WorldWideScience

Sample records for technology mit emissions

  1. Material Identification Technology (MIT) concept technical feasibility study

    Energy Technology Data Exchange (ETDEWEB)

    Jones, J.L.; Harker, Y.D.; Yoon, W.Y.; Johnson, L.O.

    1993-09-01

    The Idaho National Engineering Laboratory (INEL) has initiated the design and development of a novel pulsed accelerator-based, active interrogation concept. The proposed concept, referred to as the Material Identification Technology (MIT), enables rapid (between accelerator pulses), non-destructive, elemental composition analysis of both nuclear and non-nuclear materials. Applications of this technique include material monitoring in support of counter-proliferation activities, such as export controls (at domestic and international inspection locations), SNM controls, nuclear weapon dismantlement, and chemical weapon verification. Material Identification Technology combines a pulsed, X-ray source (an electron accelerator) and a gamma detection system. The accelerator must maximize neutron production (pulse width, beam current, beam energy, and repetition rate) and minimize photon dose to the object. Current available accelerator technology can meet these requirements. The detection system must include detectors which provide adequate gamma energy resolution capability, rapid recovery after the initial X-ray interrogation pulse, and multiple single gamma event detection between accelerator pulses. Further research is required to develop the detection system. This report provides the initial feasibility assessment of the MIT concept.

  2. MIT Lincoln Laboratory: Physics and Technology in the National Interest

    Science.gov (United States)

    Ralston, Richard

    2001-03-01

    This year, MIT is celebrating the 50th anniversary of the founding of Lincoln Laboratory, which was formed at the request of the DoD with the initial goal of developing a national air defense system. In its 50 years, the Laboratory staff have made significant contributions in diverse areas including radar imaging, satellite communications, digital signal processing, computer science, semiconductor materials and solid state physics. The Laboratory has been true to its mission statement, which places strong emphasis on the application of advanced electronics to R&D in the national interest. Much of the technology is transitioned to U.S. industry for both government and commercial use. Annually more than 500 publications and meeting speeches are given, and cooperative developments with industry have targeted technology transitions ranging from next-generation photolithographic tools to microchip lasers. The Laboratory staff have been granted over 400 patents, and license to this intellectual property is at the core of many of the over 70 spin-off companies. MIT employs 2,300 people at Lincoln, including 1,200 professionals with degrees in physics, math, computer science, materials science and the engineering disciplines. Two-fifths of the professional staff are at the doctoral level; over two-thirds hold advanced degrees. This presentation will describe recent examples of research challenges for physicists in a multidisciplinary project-oriented environment.

  3. Operating experience with innovative environmental technologies; Betriebserfahrungen mit innovativen Umwelttechnologien

    Energy Technology Data Exchange (ETDEWEB)

    Spindler, H.; Bauermeister, U.; Kliche, H.; Seiffarth, K. (comps.)

    2000-03-01

    The MUT '99 (Merseburger Umwelt-Tag) discussed modern processes, technologies and plants for treatment and utilisation of waste. The conference was attended by industrial organisations and scientific institutions. [German] Der 9. Merseburger Umwelt-Tag MUT '99 steht unter dem Motto 'Betriebserfahrungen mit innovativen Umwelttechnologien - Moderne wirtschaftliche Verfahren, Technologien und Anlagen zur Behandlung/Verwertung nichtvermeidbaren Abfalls', wobei der Begriff 'Abfall' sich letztlich auf alle Umweltmedien bezieht. Entsprechend dem Motto dieser Tagung stellen Unternehmen, Betriebe und wissenschaftliche Einrichtungen ihre Erfahrungen auf dem Gebiet der Umwelttechnologien vor, um Entwicklungen auf diesem Gebiet einer breiten Diskussion zu eroeffnen. Dabei soll es insbesondere um die Behandlung nicht vermeidbarer Abfaelle und Abwaesser gehen. (orig.)

  4. The trade in emission permits; Der Handel mit Emissionszertifikaten

    Energy Technology Data Exchange (ETDEWEB)

    Ates, Aynur

    2011-07-01

    The emissions trading system creates a market incentive to reduce emissions of CO{sub 2}, a climate-damaging gas, in those places where their avoidance is least expensive. This way of optimising resource efficiency is the basic idea underlying the emissions trading system. However, in practice the concept of emissions trading has failed. A fundamental legislative reform is needed in order to eliminate the existing ambiguities and risks associated with emissions trading. The present dissertation examines the complex problems encountered at the interface between European legislation and its implementation at national level as well as the imperfect meshing between public and private law with its resulting legal uncertainties.

  5. [R]MIT Research Centre at Delft University of Technology: A Bridge between Research, Education, Society and Profession

    Science.gov (United States)

    Zijlstra, Hielkje

    2009-01-01

    In 2006, we launched the [R]MIT Research Centre (Modification, Intervention Transformation) at the Faculty of Architecture at Delft University of Technology. [R]MIT was founded to respond to the need for an integrated, multi-disciplinary approach to the transformation of the built environment. [R]MIT aims to bring momentum to the renewal of…

  6. Negative Emissions Technology

    Science.gov (United States)

    Day, Danny

    2006-04-01

    Although `negative emissions' of carbon dioxide need not, in principle, involve use of biological processes to draw carbon out of the atmosphere, such `agricultural' sequestration' is the only known way to remove carbon from the atmosphere on time scales comparable to the time scale for anthropogenic increases in carbon emissions. In order to maintain the `negative emissions' the biomass must be used in such a way that the resulting carbon dioxide is separated and permanently sequestered. Two options for sequestration are in the topsoil and via geologic carbon sequestration. The former has multiple benefits, but the latter also is needed. Thus, although geologic carbon sequestration is viewed skeptically by some environmentalists as simply a way to keep using fossil fuels---it may be a key part of reversing accelerating climate forcing if rapid climate change is beginning to occur. I will first review the general approach of agricultural sequestration combined with use of resulting biofuels in a way that permits carbon separation and then geologic sequestration as a negative emissions technology. Then I discuss the process that is the focus of my company---the EPRIDA cycle. If deployed at a sufficiently large scale, it could reverse the increase in CO2 concentrations. I also estimate of benefits --carbon and other---of large scale deployment of negative emissions technologies. For example, using the EPRIDA cycle by planting and soil sequestering carbon in an area abut In 3X the size of Texas would remove the amount of carbon that is being accumulated worldwide each year. In addition to the atmospheric carbon removal, the EPRIDA approach also counters the depletion of carbon in the soil---increasing topsoil and its fertility; reduces the excess nitrogen in the water by eliminating the need for ammonium nitrate fertilizer and reduces fossil fuel reliance by providing biofuel and avoiding natural gas based fertilizer production.

  7. Development of a technology of completely prefabricated heat-isolating facade panels; Fassadendaemm- und Sanierungstechnik mit vorgefertigten Komplettplatten

    Energy Technology Data Exchange (ETDEWEB)

    Reyer, E.; Bamberger, C.; Sieder, M. [Fakultaet fuer Bauingenieurwesen, Inst. fuer Konstruktiven Ingenieurbau, Ruhr-Univ. Bochum, Bochum (Germany)

    2003-02-01

    Due to rising prices of energy, worldwide efforts to reduce the CO{sub 2}-emission and sustainable use of decreasing energy resources, the reduction of - for our buildings required - heat energy is getting more and more important. So the ministry of urban development and house building, culture and sport (MSWKS) of the federal state Nordrhein-Westfalen promoted the research project ''Development of a technology of completely prefabricated heat-isolating facade panels - called complete panel''. In the context of this research project an innovative technology of facade insulation and renovation was developed. The Complete-Panel-technology is based on completely in factory prefabricated (therefore the designation ''Complete Panel'') facade panels with high heat insulation for the use in new and old house building facades. The craftsmanlike application of ''Complete Panels'' depends on a plug-in technology based on a bar-shaped fasteners at the wall. As main advantages offers the Complete-Panel-technology high production quality, low construction time and low restrictions on the occupant during the redevelopment measure of the frontage of the buildings. This summary of indicates the essential aspects of the Complete-Panel-technology. (orig.) [German] Aufgrund steigender Energiepreise, weltweiter Bestrebungen zur Reduzierung des CO{sub 2}-Ausstosses und zum nachhaltigen Umgang mit den begrenzten Energieressourcen gewinnt die Reduzierung des Heizenergiebedarfs unserer Gebaeude staendig an Bedeutung. Vor diesem Hintergrund foerderte das Ministerium fuer Staedtebau und Wohnen, Kultur und Sport (MSWKS) des Landes Nordrhein-Westfalen das Forschungsvorhaben Entwicklung einer Fassadendaemm- und Sanierungstechnik mit vorgefertigten Komplettplatten. Im Rahmen dieses Forschungsvorhabens wurde eine innovative Fassadendaemm- und Sanierungstechnik auf der Basis werkseitig voellig vorgefertigter (daher die Bezeichnung &apos

  8. Assessment of myocardial metabolism by positron emission tomography; Stoffwechseluntersuchungen des Herzens mit der Positronenemissionstomographie

    Energy Technology Data Exchange (ETDEWEB)

    Bengel, F.M.; Schwaiger, M. [Technische Univ. Muenchen (Germany). Nuklearmedizinische Klinik und Poliklinik

    1999-06-01

    In combination with a variety of tracers, positron emission tomography does provide noninvasive quantitative information not only about myocardial utilisation of substrates such as glucose or free fatty acids, but also about overall oxidative metabolism. PET studies of myocardial metabolism have substantially contributed to an improved understanding of regulatory mechanism as well as interaction between different substrates under normal conditions as well as under pathologic conditions such as ischemia, heart failure or diabetes mellitus, and will continue to do so in the future. (orig.) [German] Fuer die Positronenemissionstomographie stehen verschiedene Tracer zur Verfuegung, die am menschlichen Herzen nichtinvasive Quantifizierung der Utilisation von Substraten wie Glukose oder freien Fettsaeuren, aber auch des gesamten sauerstoffabhaengigen Metabolismus ermoeglichen. Stoffwechseluntersuchungen des Herzens mit der PET haben zu einem genaueren Verstaendnis von Regulationsmechanismen und Interaktionen zwischen verschiedenen Substraten sowohl im Normalzustand als auch unter pathologischen Bedingungen wie etwa bei ischaemischen Syndromen, Herzinsuffizienz oder Diabetis mellitus beigetragen. Insbesondere durch Untersuchungen von metabolischen Auswirkungen verschiedener Therapieansaetze bei Herzerkrankungen und zur Vorhersage der Effektivitaet solcher therapeutischer Strategien kann die PET auch in Zukunft einen Beitrag zur Weiterentwicklung der Kardiologie leisten. (orig.)

  9. Assessing public forecasts to encourage accountability: The case of MIT's Technology Review.

    Science.gov (United States)

    Funk, Jeffrey

    2017-01-01

    Although high degrees of reliability have been found for many types of forecasts purportedly due to the existence of accountability, public forecasts of technology are rarely assessed and continue to have a poor reputation. This paper's analysis of forecasts made by MIT's Technology Review provides a rare assessment and thus a means to encourage accountability. It first shows that few of the predicted "breakthrough technologies" currently have large markets. Only four have sales greater than $10 billion while eight technologies not predicted by Technology Review have sales greater than $10 billion including three with greater than $100 billion and one other with greater than $50 billion. Second, possible reasons for these poor forecasts are then discussed including an over emphasis on the science-based process of technology change, sometimes called the linear model of innovation. Third, this paper describes a different model of technology change, one that is widely used by private companies and that explains the emergence of those technologies that have greater than $10 billion in sales. Fourth, technology change and forecasts are discussed in terms of cognitive biases and mental models.

  10. FORFAHRT - autonomous, infrastructure-supported driving with an innovative drive technology. Final report; FORFAHRT - Fahrzeugautonome und infrastrukturgestuetzte Fahrweise mit innovativer Antriebstechnologie. Abschlussbericht

    Energy Technology Data Exchange (ETDEWEB)

    Neunzig, D.; Wallentowitz, H.

    2001-10-01

    Apart from technical measures, adapted vehicle operation and driver actions are the most promising measures for reduction of pollutant emissions. The FORFAHRT project aims at the development of a vehicle concept combined with concepts for optimisation of traffic. The new vehicle concept will include a driver supporting system which will reduce emissions on a short-term or medium-term basis by checking ahead to avoid sudden driving manoeuvres. For this, the ika program system PELOPS was used in a simulation study for developing and analyzing a vehicle concept with appropriate drive and telematics technologies. Another part of the project involved an investigation of the information required on road layout and traffic conditions for the purpose of emission minimisation, and of the effects of checking ahead on the traffic situation. The analyses of the new driver assistance concept suggest a practically relevant consumption reduction of more than 20 percent for the FORFAHRT system. [German] Zur Minimierung der Emissionen des Strassenverkehrs werden heute hauptsaechlich zwei Ansaetze verfolgt: Mit Hilfe umfangreicher technischer Massnahmen wird einerseits der Schadstoffausstoss des Motors weiter reduziert und andererseits werden die auf das Fahrzeug wirkenden Fahrwiderstaende durch z.B. Leichtbau verringert. Neben rein technischen Optimierungsmassnahmen besteht ein erhebliches Emissionsminderungspotential in der Anpassung des Fahrzeugbetriebs und der Fahrweise des Fahrzeugfuehrers an die jeweilige Verkehrssituation. Das vorliegende Projekt FORFAHRT nimmt diesen Gedanken auf und verknuepft technische Massnahmen mit Konzepten zur Optimierung des Verkehrsablaufs. Ziel von FORFAHRT ist die Entwicklung eines Fahrzeugkonzeptes, welches kurz- bzw. mittelfristig mit Hilfe eines geeigneten Fahrerassistenzsystems eine deutliche Minimierung der Emissionen durch eine vorausschauende und damit ruhige Fahrweise ermoeglicht. Hierzu wird im Rahmen einer Simulationsstudie mit dem ika

  11. Variable Emissivity Through MEMS Technology

    Science.gov (United States)

    Darrin, Ann Garrison; Osiander, Robert; Champion, John; Swanson, Ted; Douglas, Donya; Grob, Lisa M.; Powers, Edward I. (Technical Monitor)

    2000-01-01

    This paper discusses a new technology for variable emissivity (vari-e) radiator surfaces, which has significant advantages over traditional radiators and promises an alternative design technique for future spacecraft thermal control systems. All spacecraft rely on radiative surfaces to dissipate waste heat. These radiators have special coatings, typically with a low solar absorptivity and a high infrared-red emissivity, that are intended to optimize performance under the expected heat load and thermal sink environment. The dynamics of the heat loads and thermal environment make it a challenge to properly size the radiator and often require some means of regulating the heat rejection rate of the radiators in order to achieve proper thermal balance. Specialized thermal control coatings, which can passively or actively adjust their emissivity offer an attractive solution to these design challenges. Such systems would allow intelligent control of the rate of heat loss from a radiator in response to heat load and thermal environmental variations. Intelligent thermal control through variable emissivity systems is well suited for nano and pico spacecraft applications where large thermal fluctuations are expected due to the small thermal mass and limited electric resources. Presently there are three different types of vari-e technologies under development: Micro ElectroMechanical Systems (MEMS) louvers, Electrochromic devices, and Electrophoretic devices. This paper will describe several prototypes of micromachined (MEMS) louvers and experimental results for the emissivity variations measured on theses prototypes. It will further discuss possible actuation mechanisms and space reliability aspects for different designs. Finally, for comparison parametric evaluations of the thermal performances of the new vari-e technology and standard thermal control systems are presented in this paper.

  12. Bluetec. The concept for diesel engines with lowest emissions; Bluetec. Das Konzept fuer Dieselmotoren mit niedrigsten Emissionen

    Energy Technology Data Exchange (ETDEWEB)

    Schommers, Joachim; Reichel, Stephan [Daimler AG, Stuttgart (Germany); Zygan, Andreas; Binz, Ralf; Eckert, Dietmar; Paule, Markus; Kempka, Karl-Heinz [Daimler AG, Sindelfingen (Germany)

    2008-05-15

    In October 2006 when Mercedes-Benz introduced the model E 320 Bluetec, it brought the first production diesel passenger car to the market that met US Tier 2 Bin8 emission standards. Mercedes-Benz will continue its Bluetec offensive in 2008, offering the V6 diesel engine in the M, GL and R Classes in the USA, using the SCR/AdBlue technology which meets the US Tier 2 Bin5 emission standards and thereby all currently valid emission standards for diesel passenger cars worldwide. (orig.)

  13. Automation technology with future perspectives. Natural gas underground storage with ABB Advant {sup trademark} OCS; Automatisierungswelt mit Zukunft. Untertageerdgasspeicherung mit ABB-Advant {sup trademark} OCS

    Energy Technology Data Exchange (ETDEWEB)

    Kerscht, S.M. [SK Automation AG, Basel (Switzerland); Katzenbach, B. [VEW Energie AG, Dortmund (Germany). Abt. Leittechnik

    1996-09-13

    The natural gas underground storage Kalle, operated by the Vereinigte Elektrizitaetswerke at Dortmund is used for the reduction of natural gas peaks. The installed control plant (PSI) consists of UNIX-work stations and server (DEC alpha series) with a modular control system. Thus the preconditions have been established in order to observe and if necessary control all VEW storage from Dortmund by means of peer-to-peer connections based on TCP/IP. In comparison to classic remote control systems, peer-to-peer connections are more flexible, more efficient and cost-effective because standard hardware can be applied. (MSK) [Deutsch] Der Untertageerdgasspeicher Kalle, der von den Vereinigten Elektrizitaetswerken mit Sitz in Dortmund betrieben wird, dient zur Reduzierung von Erdgasspitzen. Die dort installierten Leitanlage (PSI) besteht aus UNIX-Workstations und -Servern (DEC-alpha-Serie) mit einem modularen Leitsystemaufsatz. Damit sind die Voraussetzungen geschaffen, um mit Hilfe von Rechner-Rechner-Kopplungen auf Basis TCP/IP von Dortmund aus alle VEW-Speicher zu beobachten und bei Bedarf auch zu steuern. Die Rechner-Rechner-Kopplungen sind gegenueber klassischen Fernwirkstrecken wesentlich flexibler, leistungsfaehiger und letztlich auch preiswerter, da Standardhardware verwendet werden kann. (MSK)

  14. [Diesel emission control technologies: a review].

    Science.gov (United States)

    He, Hong; Weng, Duan; Zi, Xin-Yun

    2007-06-01

    The authors reviewed the researches on diesel emission control for both new engine technologies and aftertreatment technologies. Emphases were focused on the recent advancements of the diesel particulate filter (DPF) and the selective catalytic reduction (SCR) of NO(x). In addition, it was explored for the future development in this field.

  15. Emission and operating performance of a biomethane tractor with dual fuel engine; Emissions- und Betriebsverhalten eines Biomethan-Traktors mit Zuendstrahlmotor

    Energy Technology Data Exchange (ETDEWEB)

    Mautner, Sebastian [Technologie- und Foerderzentrum (TFZ), Straubing (Germany); Emberger, Peter; Thuneke, Klaus; Remmele, Edgar

    2016-08-01

    The use of biomethane as fuel for agricultural machinery with dual fuel technology is contributing to climate protection and ensures safe fuel supply. So far, hardly any documented operational experiences are known. The aim of the project, funded by the Bavarian Ministry of Economic Affairs and Media, Energy and Technology, was to investigate practicability for daily use and the emission behaviour of a Valtra N101 prototype tractor (exhaust stage IIIA). The retrofitted dual-fuel technology of the former conventional diesel tractor simultaneously uses biomethane or natural gas and diesel as ignition fuel. During the field test over 590 working hours, the tractor showed overall high reliability. On average the operating range in dual-fuel mode with one complete filling of the gas tanks was about 11.5 hours. On the tractor test bench a significant improvement of the exhaust emissions could be observed, since the gas ECU had been optimized and changed by the manufacturer. For dual-fuel operation, nitrogen oxides (NO{sub x}) are lower, whereas carbon monoxide (CO), hydrocarbons (HC) and particulate matter emissions (PM) are higher compared to solely diesel operation. In particular, HC emissions exceed the proposed limiting value, submitted by the European Commission. This is due to incomplete gas combustion and insufficient conversion by the exhaust after-treatment-system (methane slip). A big potential for optimization is expected by adjusting the operating point-specific gasdiesel ratio and improving the exhaust gas aftertreatment system.

  16. Advanced technology development reducing CO2 emissions

    Energy Technology Data Exchange (ETDEWEB)

    Kim, Dong Sup

    2010-09-15

    Responding to Korean government policies on green growth and global energy/ environmental challenges, SK energy has been developing new technologies to reduce CO2 emissions by 1) CO2 capture and utilization, 2) efficiency improvement, and 3) Li-ion batteries. The paper introduces three advanced technologies developed by SK energy; GreenPol, ACO, and Li-ion battery. Contributing to company vision, a more energy and less CO2, the three technologies are characterized as follows. GreenPol utilizes CO2 as a feedstock for making polymer. Advanced Catalytic Olefin (ACO) reduces CO2 emission by 20% and increase olefin production by 17%. Li-ion Batteries for automotive industries improves CO2 emission.

  17. Mit kokkeri

    DEFF Research Database (Denmark)

    Ejlersen, Søren; Lorang, Louisa

    MIT kokkeri er resultatet af et samarbejde mellem Komiteen for Sundhedsoplysning, Institut for Uddannelse og Pædagogik/Aarhus Universitet og Haver til Maver. Projektet støttes af Nordea-fonden. Bag kogebogens mange opskrifter står en række erfarne madeksperter bestående af Søren Ejlersen, Louisa...

  18. Cement plant gaseous pollutant emission reduction technologies

    Directory of Open Access Journals (Sweden)

    Andrés Emilio Hoyos Barreto

    2010-10-01

    Full Text Available A brief description of SOX, NOX and CO2 formation is presented, these being the main pollutants emitted in the cement industry gas stream Several technologies for reducing NOX, SOX and CO2 emissions in long wet kilns are introduced: primary measures preventing contaminant formation and secondary/tube end emission reduction measures. Strategies for preventing CO2 (green-house effect gas formation are also addressed, such as fuel and raw material substitution and CO2 capture technologies which are still being developed.

  19. The new Class 611 diesel railcar with active tilting technology; Der neue Dieseltriebzug Baureihe 611 mit aktiver Neigetechnik

    Energy Technology Data Exchange (ETDEWEB)

    Sauer, B.; Schoenberg, S; Waetzold, S. [ABB Daimler-Benz Transportation GmbH, Henningsdorf (Germany)

    1996-06-01

    Starting with the successful Class 610, AEG Schienenfahrzeuge GmbH has been developing and building a new vehicle class with the AEG neicontrol-E active tilt technology - the Class 611. Deutsche Bahn AG has ordered 50 railcars, of which the first go into service in spring 1996. They will operate on lines that are mostly non-electrified and have frequent curves and they will run at up to 160 km/h. The new design incorporates much expertise derived from the building and operation of the VT 610, the result being a vehicle that meets the requirements of passenger- and environment-friendliness and is also easy to maintain and is economical. The electrical tilting technology has been jointly developed by AEG Schienenfahrzeuge and the Daimler-Benz subsidiary ESW. A space-saving arrangement underfloor was chosen, and it is also low in weight and largely maintenance-free. The components used have proved themselves over many years in military applications under extreme climatic conditions. (orig.) [Deutsch] Aufbauend auf der bewaehrten Baureihe 610 entwickelt und baut die ABB Daimler-Benz Transportation (Deutschland) GmbH eine neue Generation von Fahrzeugen mit der aktiven elektrischen Neigetechnik AEG neicontrol-E - die Baureihe 611. Adtranz baut unter Beteiligung der DWA 50 Triebzuege fuer die Deutsche Bahn AG, von denen die ersten im Fruehjahr 1996 in Betrieb gesetzt werden. Die Einsatzgebiete werden bogenreiche, ueberwiegend nicht elektrifizierte Strecken sein, die das neue Fahrzeug mit 160 km/h befaehrt. Viele Erfahrungen aus Bau und Betrieb des VT 610 flossen in die Konzeption ein, so dass ein den Anforderungen von Fahrgast- und Umweltfreundlichkeit, Wartung und Wirtschaftlichkeit entsprechendes Fahrzeug bereitsteht. Die elektrische Neigetechnik ist eine gemeinsame Entwicklung der ABB Daimler-Benz Transportation (Deutschland) GmbH und der Daimler Benz Tochter EXTEL SYSTEMS WEDEL (ESW). Sie ist platzsparend unterflur angebracht und zeichnet sich durch geringes Gewicht

  20. Tourism Transport, Technology, and Carbon Dioxide Emissions

    NARCIS (Netherlands)

    Peeters, P.M.

    2010-01-01

    Technological development from horse-drawn carriages to the new Airbus A380 has led to a remarkable increase in both the capacity and speed of tourist travel. This development has an endogenous systemic cause and will continue to increase carbon dioxide emissions/energy consumption if left

  1. Tourism Transport, Technology, and Carbon Dioxide Emissions

    NARCIS (Netherlands)

    Peeters, P.M.

    2010-01-01

    Technological development from horse-drawn carriages to the new Airbus A380 has led to a remarkable increase in both the capacity and speed of tourist travel. This development has an endogenous systemic cause and will continue to increase carbon dioxide emissions/energy consumption if left unchecked

  2. State-of-the-art turbine technology enabling extremely high steam temperatures in unit R of the Boxberg power plant. Significantly contributing to a reduction of CO{sub 2} emissions; Modernste Turbinentechnologie mit hoechsten Dampftemperaturen fuer das Kraftwerk Boxberg, Block R. Ein signifikanter Beitrag zur Reduktion der CO{sub 2}-Emissionen

    Energy Technology Data Exchange (ETDEWEB)

    Tremmel, A.; Brandt, C. [ALSTOM Power Generation AG, Mannheim (Germany); Mandel, H. [Vattenfall Europe Generation AG und Co. KG, Cottbus (Germany); Klauke, U. [Vattenfall Europe Powerconsult GmbH, Vetschau (Germany)

    2006-07-01

    This paper will describe the steam turbo-generator set designed for the Boxberg Power Plant, Unit R. Consistent measures of improvement have been taken, based on field-proven technology. For instance, the use of state-of-the-art materials, developed by European research groups, allows the plant to be run with extremely high steam parameters. In addition, the flow configuration in the turbine is optimised in all areas. This includes the use of advanced aerodynamic profiles for the blading and an optimised design for the low-pressure last stages, combined with a downstream diffuser. (orig.)

  3. MIT Lincoln Laboratory Facts 2013

    Science.gov (United States)

    2012-12-01

    6 years old. Technology Children’s Centers are managed by Bright Horizons and overseen by the MIT Center for Work, Family & Personal Life. Health...service-disabled veteran-owned small business, HUBZone small business, small disadvantaged business, and woman- owned small business concerns, as well...MIT $13,780 Raised for the Multiple Sclerosis Society in the Bike & Hike the Berkshires fundraiser $23,600 Raised at the annual Alzheimer’s

  4. Technological options in regard to reducing harmful environmental effects of road traffic. Fuel cell technology compared with combustion engines; Technische Optionen zur Verminderung der Verkehrsbelastungen. Brennstoffzellenfahrzeuge im Vergleich zu Fahrzeugen mit Verbrennungsmotoren

    Energy Technology Data Exchange (ETDEWEB)

    Kolke, R. [comp.

    1999-05-01

    The German Umweltbundesamt (federal environmental agency) commissioned a cost-benefit analysis to be made, testing the practical performance of fuel cell-driven automobiles, for state-of-the-art assessment of their benefits and drawbacks as compared to other available automotive fuel systems. Results available so far of calculations based on the cost-benefit analysis show that the targets involved, such as cutback of emissions and conservation of resources, can be realised within the foreseeable future at much lesser expense through the use of fuel consumption-optimized Otto engines offering lowest emission levels (of the type ULEV, ultra-low emission vehicle, or EURO 4 standard), as compared to the relevant contributions to emission reduction and other targets offered by the fuel cell-driven automobiles.(orig./CB) [Deutsch] Das Umweltbundesamt hat die Brennstoffzellentechnik im Verkehr einer Kosten-Nutzen-Betrachtung unterzogen, um zu ermitteln, welche Vor- und Nachteile sie im Vergleich zu anderen Antriebskonzepten im Verkehr nach derzeitigem Wissensstand hat. Nach den bisherigen Berechnungen am Beispiel einer Kosten-Nutzen-Analyse zeichnet sich ab, dass Emissionsminderungen und Ressourcenschutz fuer die absehbare Zeit wesentlich kostenguenstiger durch verbrauchsoptimierte Fahrzeuge mit Ottomotor mit niedrigsten Abgasemissionen (ULEV-`Ultra Low Emission Vehicle` oder EURO 4-Standard) realisiert werden koennen als durch Fahrzeuge mit Brennstoffzellenantrieb. (orig.)

  5. ZERO EMISSION POWER GENERATION TECHNOLOGY DEVELOPMENT

    Energy Technology Data Exchange (ETDEWEB)

    Ronald Bischoff; Stephen Doyle

    2005-01-20

    Clean Energy Systems (CES) was previously funded by DOE's ''Vision 21'' program. This program provided a proof-of-concept demonstration that CES' novel gas generator (combustor) enabled production of electrical power from fossil fuels without pollution. CES has used current DOE funding for additional design study exercises which established the utility of the CES-cycle for retrofitting existing power plants for zero-emission operations and for incorporation in zero-emission, ''green field'' power plant concepts. DOE funding also helped define the suitability of existing steam turbine designs for use in the CES-cycle and explored the use of aero-derivative turbines for advanced power plant designs. This work is of interest to the California Energy Commission (CEC) and the Norwegian Ministry of Petroleum & Energy. California's air quality districts have significant non-attainment areas in which CES technology can help. CEC is currently funding a CES-cycle technology demonstration near Bakersfield, CA. The Norwegian government is supporting conceptual studies for a proposed 40 MW zero-emission power plant in Stavager, Norway which would use the CES-cycle. The latter project is called Zero-Emission Norwegian Gas (ZENG). In summary, current engineering studies: (1) supported engineering design of plant subsystems applicable for use with CES-cycle zero-emission power plants, and (2) documented the suitability and availability of steam turbines for use in CES-cycle power plants, with particular relevance to the Norwegian ZENG Project.

  6. Decreasing of emissions and word protection during the cleaning process of crude oil tanks (including calculation examples). Follow up; Immissionsschutz und Arbeitsschutz bei der Reinigung von Rohoeltanks (mit Berechnungsbeispielen). Fortschreibung

    Energy Technology Data Exchange (ETDEWEB)

    Mueller-Heuser, G. [Ministerium fuer Umwelt, Raumordnung und Landwirtschaft des Landes Nordrhein-Westfalen, Duesseldorf (Germany); Altmann, B.R. [Deutsche Wissenschaftliche Gesellschaft fuer Erdoel, Erdgas und Kohle e.V., Hamburg (Germany); Arp, J. [Staatliches Umweltamt, Itzehoe (Germany); Schoenwald, H. [Landesamt fuer Gesundheit und Arbeitssicherheit des Landes Schleswig-Holstein, Itzehoe (Germany)

    2000-09-01

    Since the publication of DGMK Research Report 499 in October 1977 the knowledge of the technology for cleaning cruide oil tanks has improved, so that it appears possible that emissions of hydrocarbons less than 0,5 kg/m2 tank bottom area, according to the attached calculation examples, can be achieved. Secondary measures for cleaning crude oil tanks are currently under development so that further emission reductions of hydrocarbons up to 90% of the remaining emissions from working and evaporating can be expected. By increasing installation of double bottoms and time extension with regard to the inside inspections the number of the annual crude oil tank cleaning procedures is decreasing. The follow up of DGMK-Research Report 499 extensively describes the questions of work protection. An additional important item is the information of relevant authorities with a special paper for instructions. (orig.) [German] Seit dem Erscheinen der Erstausgabe des DGMK-Forschungsberichtes 499 im Oktober 1997 hat sich der Stand der Rohoeltankreinigungstechnik fortentwickelt, so dass Emissionen an Kohlenwasserstoffen {<=}0,5 kg je m{sup 2} Tankbodenflaeche nach den anliegenden Berechnungsbeispielen sicher einhaltbar erscheinen. Sekundaermassnahmen bei der Rohoeltankreinigung befinden sich gegenwaertig in der Entwicklung und lassen eine weitere Minderung der Kohlenwasserstoffemissionen bis zu 90% der verbleibenden Emission aus Verdraengung und Belueftung erwarten. Durch den zunehmenden Einbau von Doppelboeden sowie Fristverlaengerung in Bezug auf die Innenbesichtigungspflichten sinkt die Zahl der jaehrlichen Rohoeltankreinigungen. In der Fortschreibung des DGMK-Forschungsberichtes 499 wird auf die Belange des Arbeitsschutzes ausfuehrlich eingegangen. Ein weiterer wesentlicher Punkt ist die Mitteilung an die zustaendigen Behoerden, fuer die ein Formblatt mit Hinweisen erarbeitet worden ist. (orig.)

  7. Decreasing of emissions and word protection during the cleaning process of crude oil tanks (including calculation examples). Follow up; Immissionsschutz und Arbeitsschutz bei der Reinigung von Rohoeltanks (mit Berechnungsbeispielen). Fortschreibung

    Energy Technology Data Exchange (ETDEWEB)

    Mueller-Heuser, G. [Ministerium fuer Umwelt, Raumordnung und Landwirtschaft des Landes Nordrhein-Westfalen, Duesseldorf (Germany); Altmann, B.R. [Deutsche Wissenschaftliche Gesellschaft fuer Erdoel, Erdgas und Kohle e.V., Hamburg (Germany); Arp, J. [Staatliches Umweltamt, Itzehoe (Germany); Schoenwald, H. [Landesamt fuer Gesundheit und Arbeitssicherheit des Landes Schleswig-Holstein, Itzehoe (Germany)

    2000-09-01

    Since the publication of DGMK Research Report 499 in October 1977 the knowledge of the technology for cleaning cruide oil tanks has improved, so that it appears possible that emissions of hydrocarbons less than 0,5 kg/m2 tank bottom area, according to the attached calculation examples, can be achieved. Secondary measures for cleaning crude oil tanks are currently under development so that further emission reductions of hydrocarbons up to 90% of the remaining emissions from working and evaporating can be expected. By increasing installation of double bottoms and time extension with regard to the inside inspections the number of the annual crude oil tank cleaning procedures is decreasing. The follow up of DGMK-Research Report 499 extensively describes the questions of work protection. An additional important item is the information of relevant authorities with a special paper for instructions. (orig.) [German] Seit dem Erscheinen der Erstausgabe des DGMK-Forschungsberichtes 499 im Oktober 1997 hat sich der Stand der Rohoeltankreinigungstechnik fortentwickelt, so dass Emissionen an Kohlenwasserstoffen {<=}0,5 kg je m{sup 2} Tankbodenflaeche nach den anliegenden Berechnungsbeispielen sicher einhaltbar erscheinen. Sekundaermassnahmen bei der Rohoeltankreinigung befinden sich gegenwaertig in der Entwicklung und lassen eine weitere Minderung der Kohlenwasserstoffemissionen bis zu 90% der verbleibenden Emission aus Verdraengung und Belueftung erwarten. Durch den zunehmenden Einbau von Doppelboeden sowie Fristverlaengerung in Bezug auf die Innenbesichtigungspflichten sinkt die Zahl der jaehrlichen Rohoeltankreinigungen. In der Fortschreibung des DGMK-Forschungsberichtes 499 wird auf die Belange des Arbeitsschutzes ausfuehrlich eingegangen. Ein weiterer wesentlicher Punkt ist die Mitteilung an die zustaendigen Behoerden, fuer die ein Formblatt mit Hinweisen erarbeitet worden ist. (orig.)

  8. A Model of Technological Growth under Emission Constraints

    OpenAIRE

    Rovenskaya, E.

    2006-01-01

    We suggest and analyze a model of global technological growth under a prescribed constraint on the annual emission of greenhouse gases (GHG). The model assumes that industrial GHG emission is positively related to the world's production output driven by the development of the "production"technology stock. "Cleaning" technology is developed in parallel to keep the annual GHG emission within a "safety" zone. The ratio between annual investment in "cleaning" technology and annual investment in "...

  9. Characterization and comparison of emissions from rudimentary waste disposal technologies

    Science.gov (United States)

    Results from 2011 simulation of burn pit emissions and air curtain incinerator emissions, recent developments in methods for open air sampling, comparison of waste energy technologies, current SERDP programs in this area.

  10. Pressurized fluidized-bed power stations. Combined cycle power plants with fluidized-bed combustion, with particular regard to emissions; Druckwirbelschicht-Kraftwerke. Kombikraftwerke mit Druckwirbelschichtfeuerung - Entwicklung fuer Braunkohle unter besonderer Beruecksichtigung des Emissionsverhaltens

    Energy Technology Data Exchange (ETDEWEB)

    Chalupnik, R.W.

    1999-07-01

    Investigations were carried out to find whether this technology is suited for lignite. The state of the art of the pressurized fluidized bed technology for coal is presented. The planning of the experimental programme is explained, including unresolved problems of thermal calculation, raw lignite transport characteristics, and emissions. Emissions of atmospheric and pressurized fluidized bed combustion of coal and lignite are compared, and the results of a theoretical investigation of the potential performance are presented. Recommendations are made for further studies, and an outlook is given to future 'second generation' concepts with higher efficiencies resulting from higher gas turbine inlet temperatures. [German] Die vorliegende Arbeit berichtet ueber die Entwicklung der Kombikraftwerkstechnik mit Druckwirbelschichttechnik. Nachdem die bisherigen Aktivitaeten weltweit fast ausschliesslich fuer den Einsatz von Steinkohle betrieben wurden, bestand die Aufgabenstellung in der Erarbeitung von ersten grundlegenden Ergebnissen, aufgrund derer zu beurteilen war, ob die Druckwirbelschichttechnik fuer den Einsatz von Braunkohle geeignet ist. Kapitel 2 stellt den Stand der Technik der Druckwirbelschichtverbrennung fuer Steinkohle dar. In Kapitel 3 wird die Planung des Versuchsprogramms erlaeutert, die sich an den offenen Fragestellungen zu den waermetechnischen Rechnungen, zum Foerderverhalten von Rohbraunkohle und zum Emissionsverhalten orientierte. In der Diskussion der Ergebnisse in Kapitel 4 erfolgt eine Einordnung und Bewertung der ermittelten Emissionswerte im Vergleich zur Wirbelschichtverbrennung unter atmosphaerischen und druckaufgeladenen Bedingungen von Stein- und Braunkohle. In Kapitel 5 schliesslich werden die Ergebnisse einer durchgefuehrten theoretischen Untersuchung zur Ermittlung des Wirkungsgradpotentials dargestellt. Ferner werden Empfehlungen fuer ergaenzende, weiterfuehrende Untersuchungen gegeben. Fuer die langfristige potentielle

  11. Market structure and technology diffusion incentives under emission taxes and emission reduction subsidies

    NARCIS (Netherlands)

    de Vries, F.P.

    2007-01-01

    This paper compares emission taxes with emission reduction subsidies regarding the incentives they create to enhance technology diffusion under imperfect competition. Finns can adopt a "dirty" technology or a "clean" abatement technology. If the clean and dirty products are perfect substitutes, and

  12. Wrestling with Pedagogical Change: The TEAL Initiative at MIT

    Science.gov (United States)

    Breslow, Lori

    2010-01-01

    In the late 1990s, the physics department at the Massachusetts Institute of Technology (MIT) had a problem. The department was responsible for teaching the two required physics courses that are part of the General Institute Requirements (GIRs), MIT's core curriculum--Physics I (mechanics, or in MIT parlance, 8.01) and Physics II (electricity and…

  13. Wrestling with Pedagogical Change: The TEAL Initiative at MIT

    Science.gov (United States)

    Breslow, Lori

    2010-01-01

    In the late 1990s, the physics department at the Massachusetts Institute of Technology (MIT) had a problem. The department was responsible for teaching the two required physics courses that are part of the General Institute Requirements (GIRs), MIT's core curriculum--Physics I (mechanics, or in MIT parlance, 8.01) and Physics II (electricity and…

  14. 75 FR 80833 - Shipboard Air Emission Reduction Technology Report

    Science.gov (United States)

    2010-12-23

    ... existing technology for reducing air emissions from cargo and passenger vessels regulated under the Clean... SECURITY Coast Guard Shipboard Air Emission Reduction Technology Report AGENCY: Coast Guard, DHS. ACTION... cargo and passenger vessels that operate in United States waters and ports. For this study, the Coast...

  15. Climate Change Technology Scenarios: Energy, Emissions, and Economic Implications

    Energy Technology Data Exchange (ETDEWEB)

    Placet, Marylynn; Humphreys, Kenneth K.; Mahasenan, N Maha

    2004-08-15

    This report describes three advanced technology scenarios and various illustrative cases developed by staff of Pacific Northwest National Laboratory (PNNL) for the U.S. Climate Change Technology Program. These scenarios and illustrative cases explore the energy, emissions and economic implications of using advanced energy technologies and other climate change related technologies to reduce future emissions of greenhouse gases (GHGs). The cases were modeled using the Mini Climate Assessment Model (MiniCAM) developed by PNNL. The report describes the scenarios, the specifications for the cases, and the results. The report also provides background information on current emissions of GHGs and issues associated with stabilizing GHG concentrations.

  16. Efficient high-resolution X-ray emission spectrometry using synchrotron radiation; Effiziente hochaufloesende Roentgenemissionssprektrometrie mit Synchrotronstrahlung

    Energy Technology Data Exchange (ETDEWEB)

    Unterumsberger, Rainer

    2015-07-01

    The aim of the present work is to get access to high-resolution X-Ray Emission Spectrometry (XES) at nanoscaled materials, consisting of light elements and transition metals, by the increase of the sensitivity of a Wavelength-Dispersive Spectrometer (WDS) in the soft X-Ray range. The increase of the sensitivity was achieved by a refocusing of the incident radiation. With the increased sensitivity of the WDS, it was possible to determine the chemical species of different, nominal 100 nm thin titanium oxides. The combination of the refocusing optic and calibrated spectrometer enabled the detection and deconvolution of the L-fluorescence radiation of these nanoscaled titanium oxides. Due to the calibration of the spectrometer, a reliable determination of the transition probabilities of the titanium La- and Ll-fluorescence lines as a function of the chemical state is possible. To the best of my knowledge, the determination of the transition probabilities as a function of the chemical state in the soft X-Ray range has not been investigated yet. The quality of the refocusing was characterized using different diagnostic tools. Vertical full width at half maximum (FWHM) values of the focused beam between 10 μm to 20 μm and horizontal FWHM values between 12 μm and 25 μm could be achieved over an energy range of 180 eV to 1310 eV. Using calibrated photodiodes, it was possible to determine the absolute transmission of the used single bounce monocapillary as well as to monitor the absolute photon flux. By means of the refocusing, it was possible to increase the photon flux by a factor of 4.9 experimentally. The increase of the photon flux enables the analysis of nanoscaled materials with the used spectrometer. This could be shown based on the determination of the lower limit of detection of boron Ka and titanium La. In both cases, the lower limit of detection of 0.4 nm equivalent layer thickness was achieved (about 1.10{sup -7} g/cm{sup 2} to 2.10{sup -7} g/cm{sup 2} or 3

  17. AdBlue as a reducing agent for the decrease of NO{sub x} emissions from diesel engines of commercial vehicles; AdBlue als Reduktionsmittel fuer die Absenkung der NO{sub x}-Emissionen aus Nutzfahrzeugen mit Dieselmotor

    Energy Technology Data Exchange (ETDEWEB)

    Trautwein, W.P.

    2003-09-01

    The Parliament of the European Union has issued stricter emission standards (Euro 4 and 5) for diesel engines of HD (heavy duty) commercial vehicles for the years 2005 and 2008. After comparing and testing various technical options the European manufactures of HD commercial vehicles have agreed on one method, the ''selective catalytic reduction'' (SCR) and on one reducing agent, AdBlue, an aqueous solution of urea. The European automobile industry plans to successively equip HD vehicles with the SCR technology. The automobile industry assumes that mineral oil industry and trade will make available the reducing agent AdBlue via a separate tanking system at their public service stations - eventually in a balanced distribution throughout Europe. This report describes the activities of national and international committees engaged in the introduction of the SCR/urea technology. It also outlines questions as yet unresolved with respect to the new technical and logistic requirements. (orig.) [German] Das Parlament der Europaeischen Union hat fuer die Jahre 2005 und 2008 verschaerfte Abgasnormen fuer Dieselmotoren von schweren Nutzfahrzeugen (EURO 4 und EURO 5) verabschiedet. Nach Vergleich und Erprobung verschiedener technischer Moeglichkeiten haben sich die europaeischen Hersteller von schweren Nutzfahrzeugen auf ein Verfahren, die ''selektive katalytische Reduktion'' (SCR) und ein Reduktionsmittel ''waessrige Harnstoffloesung'' (AdBlue) geeinigt. Die europaeische Automobilindustrie plant, ab dem Jahr 2004 schwere Nutzfahrzeuge mit der SCR-Technik sukzessive auszuruesten. Die Automobilindustrie geht davon aus, dass die Mineraloelwirtschaft das Reduktionsmittel AdBlue ueber ein separates Betankungssystem an ihren oeffentlichen Tankstellen schliesslich flaechendeckend zur Verfuegung stellt. Der Bericht schildert die Aktivitaeten nationaler und internationaler Gremien, die sich mit der Einfuehrung der SCR

  18. Clean heating with wood. An electrostatic separator reduces particulate matter emissions from biomass boilers; Sauber heizen mit Holz. Ein elektrostatischer Abscheider senkt die Feinstaub-Emissionen von Biomassekesseln

    Energy Technology Data Exchange (ETDEWEB)

    Meyer, Franz

    2016-08-01

    Despite considerable advances in firing technology, harmful particulate matter is produced when wood is combusted. Electrostatic precipitators, however, filter up to 90 per cent of particulate emissions from biomass boilers. These therefore enable wood burners to use a wider range of fuel and still meet the tightened requirements of Germany's 1st Ordinance on the Implementation of the Federal Immission Control Act. The major advantage: Both new and old heating plants can benefit from the new system.

  19. Modern firing technology with primary emission reduction

    Energy Technology Data Exchange (ETDEWEB)

    Juergen Willmann; Detlef Boese [Babcock Borsig Service GmbH (Germany)

    2004-07-01

    Cleaning of the flue gases of power station plants has increased enormously in the context of the environmental protection. Besides the cleaning of the flue gases of dust emissions by electrostatic precipitators the reduction of NOx emissions will become more and more important. The limit value of NOx emissions in Germany for boiler with a high steam capacity is 200mg/m{sup 3}n. Babcock has great experience of primary reduction of NOx emissions for different firing systems. For the choice of the firing system an exact knowledge about the coal and the ash composition is required. The significant properties of the coal are the calorific value and volatile matter content. The influence of firing systems and milling systems on combustion is discussed. 7 figs.

  20. Optimal deployment of emissions reduction technologies for construction equipment.

    Science.gov (United States)

    Bari, Muhammad Ehsanul; Zietsman, Josias; Quadrifoglio, Luca; Farzaneh, Mohamadreza

    2011-06-01

    The objective of this research was to develop a multiobjective optimization model to deploy emissions reduction technologies for nonroad construction equipment to reduce emissions in a cost-effective and optimal manner. Given a fleet of construction equipment emitting different pollutants in the nonattainment (NA) and near -nonattainment (NNA) counties of a state and a set of emissions reduction technologies available for installation on equipment to control pollution/emissions, the model assists in determining the mix of technologies to be deployed so that maximum emissions reduction and fuel savings are achieved within a given budget. Three technologies considered for emissions reduction were designated as X, Y, and Z to keep the model formulation general so that it can be applied for any other set of technologies. Two alternative methods of deploying these technologies on a fleet of equipment were investigated with the methods differing in the technology deployment preference in the NA and NNA counties. The model having a weighted objective function containing emissions reduction benefits and fuel-saving benefits was programmed with C++ and ILOG-CPLEX. For demonstration purposes, the model was applied for a selected construction equipment fleet owned by the Texas Department of Transportation, located in NA and NNA counties of Texas, assuming the three emissions reduction technologies X, Y, and Z to represent, respectively, hydrogen enrichment, selective catalytic reduction, and fuel additive technologies. Model solutions were obtained for varying budget amounts to test the sensitivity of emissions reductions and fuel-savings benefits with increasing the budget. Different mixes of technologies producing maximum oxides of nitrogen (NO(x)) reductions and total combined benefits (emissions reductions plus fuel savings) were indicated at different budget ranges. The initial steep portion of the plots for NO(x) reductions and total combined benefits against budgets

  1. Measurements of emission rates of hydrocarbons from sunflower as a function of temperature, light intensity and stress (ozone levels); Bestimmung von Emissionsraten pflanzlicher Kohlenwasserstoffe bei Sonnenblumen in Abhaengigkeit von Temperatur, Lichtintensitaet und Stress, insbesondere von der Belastung mit Ozon

    Energy Technology Data Exchange (ETDEWEB)

    Schuh, G.; Wildt, J.; Kley, D.

    1996-08-01

    Monoterpene, Sesquiterpene und zwei unbekannte oxygenierte Substanzen auf. In Abhaengigkeit von der Temperatur zeigten alle Emissionsraten einen exponentiellen Anstieg mit zunehmender Temperatur. Erstmals konnte eine Zunahme der Temperaturabhaengigkeit der Emissionsrate bei hoeherer Lichtintensitaet beobachtet werden. Bei Sonnenblumen wurde eindeutig die Lichtabhaengigkeit der Monoterpen- und BOVOC-, sowie der Sesquiterpen-Emissionrate gezeigt. Fuer alle Substanzen wurde waehrend stressfreier Perioden eine positive Korrelation der Emissionsraten mit der Transpirationsrate beobachtet. Allerdings wurde widerlegt, dass die Transpirationsrate der dominierende Faktor fuer die Emission ist. Erstmals wurde eine positive Korrelation der Emissionsraten der Mono- und Sesquiterpene mit der Nettophotosyntheserate beobachtet. Der Einfluss von mechanischem Stress, Verletzungsstress, Nahrungsmangel und der Belastung der Pflanzen mit Ozon machte sich in einer extremen Erhoehung der VOC-Emissionsraten um einen Faktor von 10-300 bemerkbar. Fuer die Stresssituationen Verletzung, mechanische Beanspruchung und Ozonbelastung wurden jeweils substanzspezifische Aenderungen der Emissionsrate beobachtet, die aber unabhaengig von der Stressart waren. Die Auswirkung von Ozon auf die Emissionsraten der Kohlenwasserstoffe konnte dabei erst nach einer Verzoegerungszeit von 3-4 Stunden festgestellt werden. Ozonstress hatte bei den Sonnenblumen jeweils nur am 1. Expositionstag eine Erhoehung der Emissionsraten um das 5-100-fache zur Folge, eine Wiederholung der VOC-Emissionserhoehung als Folge von Ozonstress wurde nicht beobachtet. Da eine zweite Ozonexposition keinen Einfluss auf die Emissionsrate hat, muss Ozonstress eine untergeordnete Rolle der Auswirkung auf die Atmosphaere zugeordnet werden. (orig./MG)

  2. Combustion chambers for wood furnaces with low particle emissions; Brennkammern fuer Holzfeuerstaetten mit geringen Partikelemissionen. Erste Messergebnisse zum Stand der Technik

    Energy Technology Data Exchange (ETDEWEB)

    Gaegauf, Ch.; Sattler, M.

    2007-12-15

    This interim report for the Swiss Federal Office of Energy (SFOE) takes a look at the results of a study made on the particle emissions of wood-burning ovens and furnaces by the Eco-Centre Langenbruck, Switzerland, in co-operation with the North-West Switzerland University of Applied Sciences. The work concentrated on finding innovative ways of reducing the emission of fine dust and aerosols by domestic heating units. Initial analysis has shown that present-day installations exhibit a potential for improvement both when firing-up as well as when in full operation. The measurement and analysis methods used in the tests are described. The results obtained are presented in graphical form and discussed. Measurements made on a storage-oven are presented and the results of extended particle analysis are discussed. Further development of the combustion technologies used in this area is suggested in the report's conclusions.

  3. Technology Opportunities to Reduce U.S. Greenhouse Gas Emissions

    Energy Technology Data Exchange (ETDEWEB)

    National Lab Directors, . .

    2001-04-05

    The rise in greenhouse gas emissions from fossil fuel combustion and industrial and agricultural activities has aroused international concern about the possible impacts of these emissions on climate. Greenhouse gases--mostly carbon dioxide, some methane, nitrous oxide and other trace gases--are emitted to the atmosphere, enhancing an effect in which heat reflected from the earth's surface is kept from escaping into space, as in a greenhouse. Thus, there is concern that the earth's surface temperature may rise enough to cause global climate change. Approximately 90% of U.S. greenhouse gas emissions from anthropogenic sources come from energy production and use, most of which are a byproduct of the combustion of fossil fuels. On a per capita basis, the United States is one of the world's largest sources of greenhouse gas emissions, comprising 4% of the world's population, yet emitting 23% of the world's greenhouse gases. Emissions in the United States are increasing at around 1.2% annually, and the Energy Information Administration forecasts that emissions levels will continue to increase at this rate in the years ahead if we proceed down the business-as-usual path. President Clinton has presented a two-part challenge for the United States: reduce greenhouse gas emissions and grow the economy. Meeting the challenge will mean that in doing tomorrow's work, we must use energy more efficiently and emit less carbon for the energy expended than we do today. To accomplish these goals, President Clinton proposed on June 26, 1997, that the United States ''invest more in the technologies of the future''. In this report to Secretary of Energy Pena, 47 technology pathways are described that have significant potential to reduce carbon dioxide emissions. The present study was completed before the December 1997 United Nations Framework Convention on Climate Change and is intended to provide a basis to evaluate technology

  4. Emission of low-energetic electrons in collisions of heavy ions with solid targets; Emission niederenergetischer Elektronen in Stoessen von schweren Ionen mit Festkoerpertargets

    Energy Technology Data Exchange (ETDEWEB)

    Lineva, Natallia

    2008-07-15

    At the UNILAC accelerator, we have initiated a project with the objective to investigate lowenergy electrons, emitted from solid, electrically conductive targets after the impact of swift light and heavy ions. For this purposes, we have installed, optimized, and put into operation an electrostatic toroidal electron spectrometer. First, investigations of electrons, emitted from solid-state targets after the bombardment with a monochromatic electron beam from an electron gun, has been carried out. The proposed method combines the results of the measurements with the results of dedicated Monte Carlo simulations. The method has been elaborated in a case study for carbon targets. The findings have been instrumental for the interpretation of our measurements of electrons emitted in collisions of swift ions with the same carbon targets. Our investigations focused on following ion beams: protons and (H{sup +}{sub 3})-molecules of the same energy, as well as on carbon ions with two different energies. Thin carbon, nickel, argon and gold foils has been used as targets. Electrons in the energy range between 50 eV and 1 keV have been investigated. The measured electron distributions, both integral as well as differential with respect to the polar angle, have been compared to simple standard theories for gases as well as to the results of TRAX simulations, the latter being based on data from gaseous targets. Dedicated TRAX simulations have been performed only for the carbon targets, applying the method mentioned above. Within our experimental uncertainties, we observe a good agreement of the measured and TRAX simulated data. That leads us to the conclusion that - as a first order approximation - the electron emission pattern from ion-atom collisions in solid-state targets and the one from single collisions in gases are similar. (orig.)

  5. Innovative Technology Reduces Power Plant Emissions - Commercialization Success

    Science.gov (United States)

    Parrish, Clyde

    2004-01-01

    Emission control system development includes: (1) Development of new oxidizer scrubber system to eliminate NOx waste and produce fertilizer (2) Technology licensed and a 1 to 3 MWatt-scale prototype installed on. power plant (3) Development of method to oxidize NO. to N02 (4) Experience gained from licensing NASA technology

  6. Developments and advances in emission control technology. SP-1120

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1995-12-31

    Automotive emission control is an increasingly complex subject that continues to be of vital importance. Tighter emission standards as well as requirements for increased emission system performance and durability have resulted in ongoing development and continuing advances in emission control technology. A great deal of attention continues to be focused on technologies for emission control during cold-start. Detailed analyses are required to determine fundamental mechanisms which govern emission control under a wide variety of operating conditions. Effects of possible catalyst poisons as well as the mechanical durability of aftertreatment systems are being evaluated. Engine, vehicle, and aftertreatment sensors are being utilized to monitor and ensure emission control performance. Improved analytical techniques are being used to help understand emissions problems and to suggest avenues to solutions. Papers assembled in this volume touch on all of these areas. Catalyst durability papers address issues related to hot vibration testing and catalyst durability based on substrate surface area. A variety of papers related to the chemical composition of fuels address issues such as fuel hydrocarbon and NO conversion in three-way catalysts, fuel composition effects on emissions in urban traffic, and fuel sulfur effects on catalysts and on-board diagnostics (OBD-II) systems. Information useful for understanding the performance of cold-start technologies is described in papers on a numerical method for predicting warm-up characteristics of catalysts systems, axial characterization of warmup and underfloor catalytic converters, and EHC impact on extended soak times. Other approaches for reducing cold-start emissions are addressed in papers on in-cylinder catalysts and the use of intake air oxygen enrichment technology. All papers have been processed separately for inclusion on the database.

  7. Timelines for mitigating methane emissions from energy technologies

    CERN Document Server

    Roy, Mandira; Trancik, Jessika E

    2015-01-01

    Energy technologies emitting differing proportions of methane and carbon dioxide vary in their relative climate impacts over time, due to the different atmospheric lifetimes of the two gases. Standard technology comparisons using the global warming potential (GWP) emissions equivalency metric do not reveal these dynamic impacts, and may not provide the information needed to assess technologies and emissions mitigation opportunities in the context of broader climate policy goals. Here we formulate a portfolio optimization model that incorporates changes in technology impacts as a radiative forcing (RF) stabilization target is approached. An optimal portfolio, maximizing allowed energy consumption while meeting the RF target, is obtained by year-wise minimization of the marginal RF impact in an intended stabilization year. The optimal portfolio calls for using certain higher methane-emitting technologies prior to an optimal switching year, followed by methane-light technologies as the stabilization year approac...

  8. Investment and emission control under technology and pollution externalities

    Energy Technology Data Exchange (ETDEWEB)

    Heal, Geoffrey [Graduate School of Business, Columbia University, 616 Uris Hall, New York, NY 10027 (United States); Tarui, Nori [Department of Economics, University of Hawaii at Manoa, 2424 Maile Way, Honolulu, HI 96822 (United States)

    2010-01-15

    This paper studies incentives to develop advanced pollution abatement technology when technology may spillover across agents and pollution abatement is a public good. We are motivated by a variety of pollution control issues where solutions require the development and implementation of new pollution abatement technologies. We show that at the Nash equilibrium of a simultaneous-move game with R and D investment and emission abatement, whether the free rider effect prevails and under-investment and excess emissions occur depends on the degree of technology spillovers and the effect of R and D on the marginal abatement costs. There are cases in which, contrary to conventional wisdom, Nash equilibrium investments in emissions reductions exceed the first-best case. (author)

  9. Technology for CO{sub 2} emission monitoring and control

    Energy Technology Data Exchange (ETDEWEB)

    Joyce, E.L. Jr.; Unkefer, P.J.; Pendergrass, J.H.; Parkinson, W.J.; Loose, V.W.; Brainard, J.R.

    1998-12-31

    The authors examined three specific areas relative to CO{sub 2} emissions and controls: (1) the effect of deregulation of the utility industry on emissions, (2) the role of advanced power systems in reducing emissions, and (3) developing CO{sub 2} mitigation technologies. In this work the Energy Technologies program office at Los Alamos attempted to initiate an integrated approach that includes a range of tasks involving both point and distributed CO{sub 2} control. The authors have examined evolving mitigation (separation and sequestration) technologies for CO{sub 2} disposal. The separation of hydrogen gas from high-temperature CO{sub 2}-containing streams is a critical component of carbon dioxide mitigation technology, and cost-effective point sequestration will require separation of CO{sub 2} from H{sub 2}. They investigated four types of separation techniques: two high-temperature membrane technologies, an intermediate-temperature membrane technology, and a separation technology based on the formation of CO{sub 2} hydrate compounds through reaction of CO{sub 2} with water at near freezing conditions. At Los Alamos, sequestration technologies are being developed along three principal areas: mineral sequestration of CO{sub 2}, the enhancement of natural sinks using biotechnology methods, and the conversion of CO{sub 2} to methanol using high-temperature photolysis.

  10. Alternative control technology document for bakery oven emissions. Final report

    Energy Technology Data Exchange (ETDEWEB)

    Sanford, C.W.

    1992-12-01

    The document was produced in response to a request by the baking industry for Federal guidance to assist in providing a more uniform information base for State decision-making with regard to control of bakery oven emissions. The information in the document pertains to bakeries that produce yeast-leavened bread, rolls, buns, and similar products but not crackers, sweet goods, or baked foodstuffs that are not yeast leavened. Information on the baking processes, equipment, operating parameters, potential emissions from baking, and potential emission control options are presented. Catalytic and regenerative oxidation are identified as the most appropriate existing control technologies applicable to VOC emissions from bakery ovens. Cost analyses for catalytic and regenerative oxidation are included. A predictive formula for use in estimating oven emissions has been derived from source tests done in junction with the development of the document. Its use and applicability are described.

  11. Technology Opportunities to Reduce U.S. Greenhouse Gas Emissions

    Energy Technology Data Exchange (ETDEWEB)

    1997-10-01

    This report serves as the technology basis of a needed national climate change technology strategy, with the confidence that a strong technology R&D program will deliver a portfolio of technologies with the potential to provide very substantial greenhouse gas emission reductions along with continued economic growth. Much more is needed to define such a strategy, including identification of complementary deployment policies and analysis to support the seeping and prioritization of R&D programs. A national strategy must be based upon governmental, industrial, and academic partnerships.

  12. Innovative technologies for greenhouse gas emission reduction in steel production

    Directory of Open Access Journals (Sweden)

    D. Burchart-Korol

    2016-01-01

    Full Text Available The main goal of the study was to present the most significant technological innovations aiming at reduction of greenhouse gas emission in steel production. Reduction of greenhouse gas and dust pollution is a very important aspect in the iron and steel industry. New solutions are constantly being searched for to reduce greenhouse gases (GHG. The article presents the most recent innovative technologies which may be applied in the steel industry in order to limit the emission of GHG. The significance of CCS (CO2 Capture and Storage and CCU (CO2 Capture and Utilization in the steel industry are also discussed.

  13. Cycle update : advanced fuels and technologies for emissions reduction

    Energy Technology Data Exchange (ETDEWEB)

    Smallwood, G. [National Research Council of Canada, Ottawa, ON (Canada)

    2009-07-01

    This paper provided a summary of key achievements of the Program of Energy Research and Development advanced fuels and technologies for emissions reduction (AFTER) program over the funding cycle from fiscal year 2005/2006 to 2008/2009. The purpose of the paper was to inform interested parties of recent advances in knowledge and in science and technology capacities in a concise manner. The paper discussed the high level research and development themes of the AFTER program through the following 4 overarching questions: how could advanced fuels and internal combustion engine designs influence emissions; how could emissions be reduced through the use of engine hardware including aftertreatment devices; how do real-world duty cycles and advanced technology vehicles operating on Canadian fuels compare with existing technologies, models and estimates; and what are the health risks associated with transportation-related emissions. It was concluded that the main issues regarding the use of biodiesel blends in current technology diesel engines are the lack of consistency in product quality; shorter shelf life of biodiesel due to poorer oxidative stability; and a need to develop characterization methods for the final oxygenated product because most standard methods are developed for hydrocarbons and are therefore inadequate. 2 tabs., 13 figs.

  14. Isolation and maintenance at Evonik using RFID technology; Freischaltung und Wartung mit Einsatz der RFID-Technologie bei Evonik

    Energy Technology Data Exchange (ETDEWEB)

    Rall, Hueseyin [Evonik Steag GmbH, Herne (Germany). Kraftwerksgruppe Ruhr-Ost; Stephan, Martin [Evonik Energy Services GmbH, Essen (Germany). Betriebsmanagement

    2010-07-01

    Work orders or permits of maintenance and/or control systems are partly dealt with manually. The benefit that is achieved by introducing mobile devices to display all required information at the work place will further be increased by use of the RFID-technology. This is achieved through better work assistance, reduced probability for errors and a significantly reduced amount of working hours. Evonik has developed several RFID-supported applications for mobile maintenance that support different backend-systems (e.g. SAP). This article concentrates on applications for work permit and maintenance that have been introduced at several power plant sites. (orig.)

  15. GHG emission mitigation measures and technologies in the Czech Republic

    Energy Technology Data Exchange (ETDEWEB)

    Tichy, M. [Energy Efficiency Center, Prague (Czech Republic)

    1996-12-31

    The paper presents a short overview of main results in two fields: projection of GHG emission from energy sector in the Czech Republic and assessment of technologies and options for GHG mitigation. The last part presents an overview of measures that were prepared for potential inclusion to the Czech Climate Change Action Plan.

  16. Semiconductor technology for reducing emissions and increasing efficiency

    Energy Technology Data Exchange (ETDEWEB)

    Duffin, B.; Frank, R. [Motorola Semiconductor Products Sector, Phoenix, AZ (United States)

    1997-12-31

    The cooperation and support of all industries are required to significantly impact a worldwide reduction in gaseous emissions that may contribute to climate change. Each industry also is striving to more efficiently utilize the resources that it consumes since this is both conservation for good citizenship and an intelligent approach to business. The semiconductor industry is also extremely concerned with these issues. However, semiconductor manufacturer`s products provide solutions for reduced emissions and increased efficiency in their industry, other industries and areas that can realize significant improvements through control technology. This paper will focus on semiconductor technologies of digital control, power switching and sensing to improve efficiency and reduce emissions in automotive, industrial, and office/home applications. 10 refs., 13 figs.

  17. New technologies reducing emissions from combustion of biofuels

    Energy Technology Data Exchange (ETDEWEB)

    Oravainen, H.

    1997-12-31

    In reducing CO{sub 2} emissions, bioenergy will be the most important source of renewable energy in the next few decades. In principle, combustion of biomass is friendly to the environment because CO{sub 2} released during combustion is recycled back into natural circulation. Biofuels normally contain little nitrogen and sulphur. However, depending on the combustion technology used, emissions may be quite high. This is true of combustion of biomass fuels in small appliances like wood stoves, fireplaces, small boilers etc. When fuels having high content of volatile matter are burnt in appliances using batch type combustion, the process is rather an unsteady-state combustion. Emissions of carbon monoxide, other combustible gases and particulates are quite difficult to avoid. With continuous combustion processes this is not normally a problem. This conference paper presents some means of reducing emissions from combustion of biofuels. 5 refs., 4 figs.

  18. Proceedings of the 2. MIT international conference on the next generation of nuclear power technology. Final report

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1993-12-31

    The goal of the conference was to try to attract a variety of points of view from well-informed people to debate issues concerning nuclear power. Hopefully from that process a better understanding of what one should be doing will emerge. In organizing the conference lessons learned from the previous one were applied. A continuous effort was made to see to it that the arguments for the alternatives to nuclear power were given abundant time for presentation. This is ultimately because nuclear power is going to have to compete with all of the energy technologies. Thus, in discussing energy strategy all of the alternatives must be considered in a reasonable fashion. The structure the conference used has seven sessions. The first six led up to the final session which was concerned with what the future nuclear power strategy should be. Each session focused upon a question concerning the future. None of these questions has a unique correct answer. Rather, topics are addressed where reasonable people can disagree. In order to state some of the important arguments for each session`s question, the combination of a keynote paper followed by a respondent was used. The respondent`s paper is not necessarily included to be a rebuttal to the keynote; but rather, it was recognized that two people will look at a complex question with different shadings. Through those two papers the intention was to get out the most important arguments affecting the question for the session. The purpose of the papers was to set the stage for about an hour of discussion. The real product of this conference was that discussion.

  19. Differentialtherapie mit Kalziumantagonisten

    Directory of Open Access Journals (Sweden)

    Dörffel Y

    2004-01-01

    Full Text Available Der antihypertensive Effekt der Kalziumantagonisten ist bei allen Altersgruppen und Rassen seit längerem erwiesen. Darüber hinaus sind verschiedene andere positive Wirkungen dokumentiert, wie z. B. die Verbesserung der Endothelfunktion, Reduktion der Atheroskleroseprogression in der A. carotis, Reduktion der linksventrikulären und der arteriolären Hypertrophie sowie eine Verbesserung der arteriellen Compliance. Kalziumantagonisten verschlechtern nicht den Lipid- oder Glukosestoffwechsel. Für den Einsatz in der Praxis ist die Kenntnis der Heterogenität der Substanzklasse mit sich daraus ableitenden Vor- und Nachteilen sowie unterschiedlichen Indikationen von großer Relevanz. Den Prototypen der Non-Dihydropyridine Verapamil (chem. Phenylalkylamin und Diltiazem (chem. Benzothiazepine steht die umfangreiche Substanzklasse der Dihydropyridine (DHP gegenüber. Zu den DHPs zählen neben dem Prototyp Nifedipin die neueren Substanzen wie Nitrendipin, Nisoldipin, Amlodipin, Felodipin, Lacidipin und Lercanidipin. DHPs sind in erster Linie Vasodilatatoren, die durch eine Reduktion des peripheren vaskulären Widerstandes den arteriellen Blutdruck senken. Insbesondere bei älteren Präparaten mit schnellem Wirkungseintritt, wie z. B. beim unretardierten Nifedipin, einem DHP der ersten Generation, kann eine autonome Gegenregulation ausgelöst werden. Bei den modernen DHPs mit längerer Wirkungsdauer und bei den Non-DHPs ist dieser Effekt bedeutend abgeschwächt oder gar nicht mehr nachweisbar. In mehreren prospektiven, randomisierten und placebokontrollierten Studien konnte bei Patienten mit isolierter systolischer Hypertonie eine Reduktion der Schlaganfallrate dokumentiert werden (Syst-Eur, Syst-China, signifikante Unterschiede bezüglich Mortalität und Morbidität ergaben sich im Vergleich mit anderen Antihypertensiva (Diuretika, Betablocker, ACE-Hemmer nicht (STOP-2, INSIGHT, NORDIL, ALLHAT, INVEST. In der meist erforderlichen antihypertensiven

  20. Emission and technology Europe/NAFTA; Emission and Technologie Europa/NAFTA

    Energy Technology Data Exchange (ETDEWEB)

    Flotho, A.; Kuespert, A.; Schmid, W. [DaimlerChrysler AG, Stuttgart (Germany)

    2002-07-01

    One of the main tasks in engine development heavy-duty motor cars at DaimlerChrysler, who are the world's biggest manufacturer in this field, is the development of optimised engine technologies to meet the varied emission regulations world-wide. The on-highway emission specifications for heavy-duty engines in Europe and NAFTA states have significantly influenced the engine technology. This technology intends to show and evaluate possible future technology scenarios. (orig.) [German] Eine wesentliche Aufgabe der Nfz-Motorenentwicklung von DaimlerChrysler - des weltweit groessten Herstellers von Nutzfahrzeugen - besteht darin, fuer die regional unterschiedlichen Fahrzeuge die optimal passende Motorentechnologie zur Erfuellung der weltweiten Emissionsanforderungen bereitzustellen. Die On-Highway-Emissionsvorschriften fuer schwere Nutzfahrzeugmotoren in Europa und NAFTA haben bisher die Motorentechnologie wesentlich beeinflusst. Der Vortrag soll moegliche zukuenftige Technologieszenarien aufzeigen und bewerten. (orig.)

  1. Particulate emissions from diesel engines: correlation between engine technology and emissions.

    Science.gov (United States)

    Fiebig, Michael; Wiartalla, Andreas; Holderbaum, Bastian; Kiesow, Sebastian

    2014-03-07

    In the last 30 years, diesel engines have made rapid progress to increased efficiency, environmental protection and comfort for both light- and heavy-duty applications. The technical developments include all issues from fuel to combustion process to exhaust gas aftertreatment. This paper provides a comprehensive summary of the available literature regarding technical developments and their impact on the reduction of pollutant emission. This includes emission legislation, fuel quality, diesel engine- and exhaust gas aftertreatment technologies, as well as particulate composition, with a focus on the mass-related particulate emission of on-road vehicle applications. Diesel engine technologies representative of real-world on-road applications will be highlighted.Internal engine modifications now make it possible to minimize particulate and nitrogen oxide emissions with nearly no reduction in power. Among these modifications are cooled exhaust gas recirculation, optimized injections systems, adapted charging systems and optimized combustion processes with high turbulence. With introduction and optimization of exhaust gas aftertreatment systems, such as the diesel oxidation catalyst and the diesel particulate trap, as well as NOx-reduction systems, pollutant emissions have been significantly decreased. Today, sulfur poisoning of diesel oxidation catalysts is no longer considered a problem due to the low-sulfur fuel used in Europe. In the future, there will be an increased use of bio-fuels, which generally have a positive impact on the particulate emissions and do not increase the particle number emissions.Since the introduction of the EU emissions legislation, all emission limits have been reduced by over 90%. Further steps can be expected in the future. Retrospectively, the particulate emissions of modern diesel engines with respect to quality and quantity cannot be compared with those of older engines. Internal engine modifications lead to a clear reduction of the

  2. MIT's interferometer CST testbed

    Science.gov (United States)

    Hyde, Tupper; Kim, Ed; Anderson, Eric; Blackwood, Gary; Lublin, Leonard

    1990-12-01

    The MIT Space Engineering Research Center (SERC) has developed a controlled structures technology (CST) testbed based on one design for a space-based optical interferometer. The role of the testbed is to provide a versatile platform for experimental investigation and discovery of CST approaches. In particular, it will serve as the focus for experimental verification of CSI methodologies and control strategies at SERC. The testbed program has an emphasis on experimental CST--incorporating a broad suite of actuators and sensors, active struts, system identification, passive damping, active mirror mounts, and precision component characterization. The SERC testbed represents a one-tenth scaled version of an optical interferometer concept based on an inherently rigid tetrahedral configuration with collecting apertures on one face. The testbed consists of six 3.5 meter long truss legs joined at four vertices and is suspended with attachment points at three vertices. Each aluminum leg has a 0.2 m by 0.2 m by 0.25 m triangular cross-section. The structure has a first flexible mode at 31 Hz and has over 50 global modes below 200 Hz. The stiff tetrahedral design differs from similar testbeds (such as the JPL Phase B) in that the structural topology is closed. The tetrahedral design minimizes structural deflections at the vertices (site of optical components for maximum baseline) resulting in reduced stroke requirements for isolation and pointing of optics. Typical total light path length stability goals are on the order of lambda/20, with a wavelength of light, lambda, of roughly 500 nanometers. It is expected that active structural control will be necessary to achieve this goal in the presence of disturbances.

  3. Sensitivity and Cost-benefit Analyses of Emission-constrained Technological Growth Under Uncertainty in Natural Emissions

    OpenAIRE

    Rovenskaya, E.

    2005-01-01

    The paper addresses the issue of control of world technological development under prescribed constraints on the emission of greenhouse gases. We use a stylized mathematical model of the world GDP whose growth leads to the increase of industrial emission provided in investment in "cleaning" technology acts as a control parameter in the model. The optimal control maximizing a standard economic utility index is described. Two components in total emission are distinguished: industrial emission a...

  4. NMR magnet technology at MIT

    Energy Technology Data Exchange (ETDEWEB)

    Williams, J.E.C.; Bobrov, E.S.; Iwasa, Y.; Punchard, W.F.B.; Wrenn, J.; Zhukovsky, A. (Massachusetts Inst. of Tech., Cambridge, MA (United States). Francis Bitter National Magnet Lab.)

    1992-01-01

    The design and construction of high field superconducting NMR magnets has much in common with other types of adiabatic superconducting magnets. However, two issues have a particular relevance to NMR magnets. They are field drift and homogeneity. In this paper the control of these factors in the particular context of high field NMR spectrometer magnets is examined.

  5. Electrical machines, in particular generators: superconductor technology in competition with improved conventional technology; Elektrische Maschinen, insbesondere Generatoren: Supraleiter-Technologie im Wettbewerb mit verbesserter konventioneller Technologie

    Energy Technology Data Exchange (ETDEWEB)

    Joho, R.; Ginet, C.; Schleussinger, A.

    2006-07-01

    This final report for the Swiss Federal Office of Energy (SFOE) summarises work done within the framework of a second project on the use of superconductor technology and conventional technology in electrical machines. The two variants, a generator using second-generation high-temperature superconductors (HTSC) and one using improved conventional technology are described and compared. The use of various coolants for the windings of generators of various types and usage is described and the optimisation of winding-geometry is discussed. The refrigeration equipment used to provide low-temperature coolant is looked at and the energy balance for the combination of generator and cooling system is discussed. The conclusions drawn by the project are presented and the advantages offered by both variants are discussed.

  6. Coating mit Biopolymeren

    Science.gov (United States)

    Kumpugdee-Vollrath, Mont; Nunthanid, Jurairat; Sriamornsak, Pornsak

    Biopolymere sind Polymere, die in der Natur vorkommen bzw. mit einigen Prozessen weiter bearbeitet werden, sodass sie für bestimmte Zwecke eingesetzt werden können. Häufig sind sie durch ihre Bioabbaubarkeit, Biokompatibilität und nicht vorhandene bzw. geringe Toxizität von Interesse für den Einsatz in der Medizin bzw. Pharmazie.

  7. Experience with system safety approach in railroad technology in Europe and Far East and in aerospace technology; Erfahrungen mit Ansaetzen zur Systemsicherheit in der Bahntechnik in Europa und im Fernen Osten sowie in der Raumfahrttechnik

    Energy Technology Data Exchange (ETDEWEB)

    Schaebe, H. [Technischer Ueberwachungs-Verein InterTraffic GmbH, Koeln (Germany). Inst fuer Software, Elektronik, Bahntechnik

    2000-07-01

    Safety analyses play an important role in assessing railroad technology, especially in the light of the CENELEC Standards EN 50126 and EN 50129. The European approach to system safety is based on the EN standards, whereas in Asia we had to deal with the British DEF-STAN standards. Although the approach is inspired by the European one, in the particular case specific changes have been observed. On the other hand there is a long tradition in space technology which is based in Europe on the PSS standards edited by ESA and the ECSS standards which have followed them. The EN series of standards focuses on the safety case approach. It must be shown that the system is sufficiently safe. Analyses as hazard analyses, Failure Modes, Effects, and Criticality Analyses and Risk analyses are used together with other methods. An important problem is the definition of the target for safety characteristics. We present experience from assessment of driverless people mover systems. On the other hand we have performed analyses for locomotives that have been supplied for the North East Line and the Changi Airport Line of the metro in Singapore. Here, the approach was based on the British DEF-STAN series. In this particular project, however, the approach led to a larger number of exhaustive analyses for a workshop locomotive which is equipped with a driver. In aerospace, often a large number of analyses is necessary. However, the analyses are adopted regarding their number and level of detail depending on the system. As an example, test facilities used at ESTEC (technical centre of the European Space Association) are presented. The experience gained in different areas of technology and in different geographic areas are compared. It will be shown how the EN standards can be used effectively. (orig.) [German] Sicherheitsanalysen spielen eine wichtige Rolle bei der Beurteilung der Bahntechnik, insbesondere im Rahmen der CENELEC Normen EN 50126 und EN 50129. Der Europaeische Ansatz der

  8. Results of positron emission tomography with fluorine-18-labelled fluorodeoxyglucose in staging and differential diagnosis of pancreatic cancer; Ergebnisse der Positronenemissionstomographie mit Fluor-18-markierter Fluordesoxyglukose bei Differentialdiagnose und Staging des Pankreaskarzinoms

    Energy Technology Data Exchange (ETDEWEB)

    Bares, R. [Abt. fuer Nuklearmedizin, Radiologische Universitaetsklinik Tuebingen (Germany); Dohmen, B.M. [Abt. fuer Nuklearmedizin, Radiologische Universitaetsklinik Tuebingen (Germany); Cremerius, U. [Technische Hochschule Aachen (Germany). Klinik fuer Nuklearmedizin; Fass, J. [Technische Hochschule Aachen (Germany). Chirurgische Klinik; Teusch, M. [Abt. fuer Nuklearmedizin, Radiologische Universitaetsklinik Tuebingen (Germany); Buell, U. [Technische Hochschule Aachen (Germany). Klinik fuer Nuklearmedizin

    1996-05-01

    Although the detection of pancreatic carcinoma has been considerably improved by recently developed imaging procedures, differential diagnosis between cancer and benign tumor masses, as well as lymph node staging, is still difficult. In vivo evaluation of regional glucose metabolism by means of positron emission tomography (PET) and fluorine-18-labelled fluorodeoxyglucose (FDG) is a new approach utilizing metabolic instead of morphological tumor properties for diagnosis. A total of 85 patients with suspected pancreatic carcinoma were investigated by FDG-PET prior to surgery. Static PET scans were evaluated visually as well as quantitatively, taking increased FDG uptake as a sign of malignancy. PET results were correlated with intraoperative findings and histopathology of surgical specimens. Forty-seven out of 55 (85%) malignant tumors and 23 out of 30 (77%) benign lesions were correctly classified by PET. Lymph node metastases were present in 31 patients, 19 of them (61%) positive in PET. In 7 our of 13 (54%) patients with liver metastases, PET detected hypermetabolic lesions. False-negative findings were mainly due to disturbance of glucose metabolism in diabetic patients, while most false-positive results could be attributed to acute inflammatory lesions in chronic pancreatitis. Our results indicate that classification of pancreatic masses can be improved by use of FDG-PET, which might lead to a reduction of unnecessary laparotomies in patients with benign or incurable disease. (orig.) [Deutsch] Trotz methodischer Verbesserungen in der Diagnostik des Pankreaskarzinoms ist die Differentialdiagnose pankreatischer Raumforderungen bei bestehender chronischer Pankreatitis sowie der Nachweis etwaiger Lymphknotenmetastasen bislang nur unvollstaendig geloest. Die Bestimmung des regionalen Glukosestoffwechsels mit Hilfe der Positronenemissionstomographie (PET) und Fluor-18-markierter Flurodesoxyglukose (FDG) stellt einen neuen diagnostischen Ansatz dar, der nicht auf dem

  9. MIT gets good marks for fighting gender discrimination

    Science.gov (United States)

    Gwynne, Peter

    2011-05-01

    The Massachusetts Institute of Technology (MIT) has made "significant progress" in increasing the number of female faculty members, with their numbers in science and engineering almost doubling over the last decade.

  10. Climate impacts of energy technologies depend on emissions timing

    Science.gov (United States)

    Edwards, Morgan R.; Trancik, Jessika E.

    2014-05-01

    Energy technologies emit greenhouse gases with differing radiative efficiencies and atmospheric lifetimes. Standard practice for evaluating technologies, which uses the global warming potential (GWP) to compare the integrated radiative forcing of emitted gases over a fixed time horizon, does not acknowledge the importance of a changing background climate relative to climate change mitigation targets. Here we demonstrate that the GWP misvalues the impact of CH4-emitting technologies as mid-century approaches, and we propose a new class of metrics to evaluate technologies based on their time of use. The instantaneous climate impact (ICI) compares gases in an expected radiative forcing stabilization year, and the cumulative climate impact (CCI) compares their time-integrated radiative forcing up to a stabilization year. Using these dynamic metrics, we quantify the climate impacts of technologies and show that high-CH4-emitting energy sources become less advantageous over time. The impact of natural gas for transportation, with CH4 leakage, exceeds that of gasoline within 1-2 decades for a commonly cited 3 W m-2 stabilization target. The impact of algae biodiesel overtakes that of corn ethanol within 2-3 decades, where algae co-products are used to produce biogas and corn co-products are used for animal feed. The proposed metrics capture the changing importance of CH4 emissions as a climate threshold is approached, thereby addressing a major shortcoming of the GWP for technology evaluation.

  11. Engine Validation of Noise and Emission Reduction Technology Phase I

    Science.gov (United States)

    Weir, Don (Editor)

    2008-01-01

    This final report has been prepared by Honeywell Aerospace, Phoenix, Arizona, a unit of Honeywell International, Inc., documenting work performed during the period December 2004 through August 2007 for the NASA Glenn Research Center, Cleveland, Ohio, under the Revolutionary Aero-Space Engine Research (RASER) Program, Contract No. NAS3-01136, Task Order 8, Engine Validation of Noise and Emission Reduction Technology Phase I. The NASA Task Manager was Dr. Joe Grady of the NASA Glenn Research Center. The NASA Contract Officer was Mr. Albert Spence of the NASA Glenn Research Center. This report is for a test program in which NASA funded engine validations of integrated technologies that reduce aircraft engine noise. These technologies address the reduction of engine fan and jet noise, and noise associated with propulsion/airframe integration. The results of these tests will be used by NASA to identify the engineering tradeoffs associated with the technologies that are needed to enable advanced engine systems to meet stringent goals for the reduction of noise. The objectives of this program are to (1) conduct system engineering and integration efforts to define the engine test-bed configuration; (2) develop selected noise reduction technologies to a technical maturity sufficient to enable engine testing and validation of those technologies in the FY06-07 time frame; (3) conduct engine tests designed to gain insight into the sources, mechanisms and characteristics of noise in the engines; and (4) establish baseline engine noise measurements for subsequent use in the evaluation of noise reduction.

  12. Combustion experiments in a small furnace using natural biogenic solid fuels. Emissions and ash quality. Final report; Verbrennungsversuche mit naturbelassenen biogenen Festbrennstoffen in einer Kleinfeuerungsanlage. Emissionen und Aschequalitaet. Abschlussbericht

    Energy Technology Data Exchange (ETDEWEB)

    Launhardt, T.; Hartmann, H.; Link, H.; Schmid, V.

    2000-09-01

    Emissions and ash qualities of the fuels were compared in order to assess their pollutant emissions CO, dust, C{sub n}H{sub m}, NO{sub x}, particle size distribution of airborne dust, organic and inorganic chlorinated pollutants (including PCDD/F), PAH and heavy metals. Quality characteristics of the fuels and ashes were investigated as well (nutrient and pollutant concentrations including heavy metals, chlorine, PCDD/F, PAH). The focus was on agricultural biomass, which was compared with chopped pinewood. [German] Ziel des Messvorhabens ist eine umfassende Analyse der Emissionen und der Aschenqualitaet beim Einsatz verschiedener biogener Festbrennstoffe in einer Kleinfeuerungsanlage (50 kW{sub th}). Dadurch soll eine vergleichende Bewertung der unterschiedlichen Brennstoffarten und Aufbereitungsformen (Pellet, Haeckselgut) moeglich werden und eine generelle Aussage ueber das Niveau des Schadstoffausstosses inklusive hochtoxischer organischer Komponenten abgeleitet werden. Ergaenzend dazu soll eine Quantifizierung moeglicher Einfluesse durch den Wassergehalt im Brennstoff und die Heizlast der Feuerungsanlage vorgenommen werden. Zielgroessen der Untersuchung sind der Wirkungsgrad der Feuerungsanlage, die Standard-Emissionsgroessen CO, Staub, C{sub n}H{sub m} und NO{sub x}, die Partikelgroessenverteilung des Flugstaubes, organisch und anorganisch chlorierte Schadstoffe (u.a. PCDD/F), PAK und Schwermetalle. Zusaetzlich werden eine Reihe von Qualitaetsmerkmalen im Brennstoff und in den Aschen betrachtet (Naehr- und Schadstoffgehalte, einschliesslich Schwermetalle, Chlor, PCDD/F, PAK). Im Vordergrund stehen die Biomassebrennstoffe, die speziell in der Landwirtschaft erzeugt werden. Sie werden mit dem Referenzbrennstoff Fichtenhackgut verglichen. (orig.)

  13. Positron Emission Tomography: Principles, Technology, and Recent Developments

    Science.gov (United States)

    Ziegler, Sibylle I.

    2005-04-01

    Positron emission tomography (PET) is a nuclear medical imaging technique for quantitative measurement of physiologic parameters in vivo (an overview of principles and applications can be found in [P.E. Valk, et al., eds. Positron Emission Tomography. Basic Science and Clinical Practice. 2003, Springer: Heidelberg]), based on the detection of small amounts of posi-tron-emitter-labelled biologic molecules. Various radiotracers are available for neuro-logical, cardiological, and oncological applications in the clinic and in research proto-cols. This overview describes the basic principles, technology, and recent develop-ments in PET, followed by a section on the development of a tomograph with ava-lanche photodiodes dedicated for small animal imaging as an example of efforts in the domain of high resolution tomographs.

  14. Technologies and policies for "hard to scrub" emissions sources

    Science.gov (United States)

    Friedmann, J.

    2016-12-01

    The science of climate change yields harsh math regarding atmospheric accumulations of GHGs. The world is far from target trajectories for 2C or 1.5C, and the global carbon budget is severe. To achieve those targets requires two things. First, we must field technologies that reduce emissions from the "hard to scrub" parts of the US and global economies, such as heavy industry (cement and steel), aviation, ocean shipping, and household cooking and heating. Second, we will likely need negative emissions pathways for those sources that prove extremely difficult to remove or reduce - the climate equivalent of adding revenue to one's budget. Such pathways may well need to convert GHG emissions (especially CO2 and methane) into useful products with minimal infrastructure builds. Dramatic advances in advanced manufacturing, 3D printing, simulation, modeling, and data analytics have made possible solutions which were previously unthinkable or impossible. This include "bespoke reactors", which can simultaneously perform separations and conversions; low-cost modular chemical systems of any scale; biologically inspired or biologically mediated energy services; direct air carbon-capture systems; and electrochemical pathways for emissions reduction and conversion. However, these approaches are unlikely to be fielded without policy actions or reforms that support such systems in competitive global energy markets. Such policy measures do NOT require a carbon price. Rather, they could include individual or combined measures such as emission or performance standards, financial incentives (like tax credits or low-cost access to capital), border adjustable tariffs, creation of CO2 utilities, ands public good surcharges. Innovation in both technical and policy arenas are needed to achieve the goals of the Paris agreement signatories, and these innovations can be simultaneously configured to deliver substantive greenhouse gas mitigation.

  15. Centre for Low Emission Technology 05-06 annual report

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2006-07-01

    Since its inception, the Centre for Low Emission Technology (cLET) has been joined by Australian Coal Research Program, Stanwell Corporation, Tarong Energy Corporation Ltd. and the University of Queensland. The Centre's third annual report records key achievements, has a message from the Chairman and the CEO, Dr Thambimuthu and gives details of Board members. An outline is given of projects in the 4 programs: gasification core facility; gas cleaning; gas processing; gas separation; and social and economic integration. The annual accounts to 30 June 2006, and the budget and forecast for 2005-2006 are included.

  16. Determination of radon emission rate with regard to energetic reconstruction of buildings; Bestimmung der Radonquellstaerke im Zusammenhang mit Massnahmen zur energetischen Sanierung von Gebaeuden

    Energy Technology Data Exchange (ETDEWEB)

    Neugebauer, Thomas; Grund, A.L.; Hingmann, H.; Buermeyer, J.; Grimm, V.; Breckow, J. [Technische Hochschule Mittelhessen (THM), Giessen (Germany). Inst. fuer Medizinische Physik und Strahlenschutz (IMPS)

    2015-07-01

    In frame of a project funded by the Federal Office for Radiation Protection (BfS) the influence of meteorological and room climate parameters and energetic reconstruction on the radon concentration inside buildings has been investigated. For this purpose parameters like temperature, air pressure, relative humidity and carbon dioxide concentration have been measured. The daily and seasonal variations of the radon concentration were influenced by the behaviour of the residents. A parameter less influenced by this behaviour is the radon emission rate. Complementary to the above mentioned project the method of determination of the radon emission rate has been developed in frame of a project funded by the Ministry of the Environment of Hesse (HMUKLV). With the improved method, it is possible to determine the radon emission rate on a continuous base. Therefore both, the radon concentration and the air exchange rate of a building have to be determined. For the verification of the method simulations and measurements have been performed. Additionally meteorological parameters have been recorded in order to evaluate possible influences on the radon emission rate.

  17. Aircraft gas turbine low-power emissions reduction technology program

    Science.gov (United States)

    Dodds, W. J.; Gleason, C. C.; Bahr, D. W.

    1978-01-01

    Advanced aircraft turbine engine combustor technology was used to reduce low-power emissions of carbon monoxide and unburned hydrocarbons to levels significantly lower than those which were achieved with current technology. Three combustor design concepts, which were designated as the hot-wall liner concept, the recuperative-cooled liner concept, and the catalyst converter concept, were evaluated in a series of CF6-50 engine size 40 degree-sector combustor rig tests. Twenty-one configurations were tested at operating conditions spanning the design condition which was an inlet temperature and pressure of 422 K and 304 kPa, a reference velocity of 23 m/s and a fuel-air-ration of 10.5 g/kg. At the design condition typical of aircraft turbine engine ground idle operation, the best configurations of all three concepts met the stringent emission goals which were 10, 1, and 4 g/kg for CO, HC, and Nox, respectively.

  18. Zero-emission vehicle technology assessment. Final report

    Energy Technology Data Exchange (ETDEWEB)

    Woods, T.

    1995-08-01

    This is the final report in the Zero-Emission Vehicle (ZEV) Technology Assessment, performed for NYSERDA by Booz-Allen & Hamilton Inc. Booz-Allen wrote the final report, and performed the following tasks as part of the assessment: assembled a database of key ZEV organizations, their products or services, and plans; described the current state of ZEV technologies; identified barriers to widespread ZEV deployment and projected future ZEV technical capabilities; and estimated the cost of ZEVs from 1998 to 2004. Data for the ZEV Technology Assessment were obtained from several sources, including the following: existing ZEV industry publications and Booz-Allen files; major automotive original equipment manufacturers; independent electric vehicle manufacturers; battery developers and manufacturers; infrastructure and component developers and manufacturers; the U.S. Department of Energy, the California Air Resources Board, and other concerned government agencies; trade associations such as the Electric Power Research Institute and the Electric Transportation Coalition; and public and private consortia. These sources were contacted by phone, mail, or in person. Some site visits of manufacturers also were conducted. Where possible, raw data were analyzed by Booz-Allen staff and/or verified by independent sources. Performance data from standardized test cycles were used as much as possible.

  19. Light-Duty Automotive Technology, Carbon Dioxide Emissions, and Fuel Economy Trends Data

    Data.gov (United States)

    U.S. Environmental Protection Agency — The Light-Duty Automotive Technology, Carbon Dioxide Emissions, and Fuel Economy Trends report is the authoritative reference for carbon dioxide (CO2) emissions,...

  20. The use of urea to combat nitrogen oxides; Selective catalytic denitrification of Diesel emissions. Mit Harnstoff gegen Stickoxide; Selektive katalytische Entstickung von Dieselabgasen

    Energy Technology Data Exchange (ETDEWEB)

    Koebel, M.; Elsener, M.; Eicher, H. (Paul Scherrer Inst. (PSI), Villigen (Switzerland))

    1990-01-01

    Reports available deal with efforts to denitrify Diesel emissions by the use of urea instead of ammonia and applying an SCT (selective catalytic reduction) process. These efforts are pursued in a common project carried out by the Paul Scherrer Institute and the Eicher + Pauli AG, and promoted by the Federal Office of Energy. The Paul Scherrer Institute is dedicated mainly to basic research, and technique of analyzing and laboratory work, while Eicher + Pauli AG are responsible for the construction and operation of the pilot plant.

  1. MIT App Inventor: Enabling Personal Mobile Computing

    OpenAIRE

    Pokress, Shaileen Crawford; Veiga, José Juan Dominguez

    2013-01-01

    MIT App Inventor is a drag-and-drop visual programming tool for designing and building fully functional mobile apps for Android. App Inventor promotes a new era of personal mobile computing in which people are empowered to design, create, and use personally meaningful mobile technology solutions for their daily lives, in endlessly unique situations. App Inventor's intuitive programming metaphor and incremental development capabilities allow the developer to focus on the logic for programming ...

  2. Investment Strategy of Emission-Reduction Technology in a Supply Chain

    Directory of Open Access Journals (Sweden)

    Gao Xiang Lou

    2015-08-01

    Full Text Available Greenhouse gas emissions have serious impacts on the natural environment. Therefore, the restrictions imposed on carbon emission force enterprises to take carbon emission into consideration when making production decisions. In this paper, in the context of allowing emission trading and investment of emission reduction technology, models were presented for a two-stage supply chain to analyze the optimal investment and pricing decisions. The results indicate that manufacturer’s endurance capacity of reduction difficulty is higher in the cooperation model than in the Stackelberg game model, and that perfect coordination of supply chains can be realized by a revenue sharing contract. From the perspective of a consumer, low-carbon products mean higher price, so that subsidies or tax exemptions should be provided to keep low prices. Meanwhile, the government can promote investment in emission-reduction technologies and achieve its emission reduction targets by controlling emission trading price, strengthening emission reduction publicity and providing technology investment subsidies.

  3. Effects of airplane emissions on the composition of the atmosphere: Investigations using a mesoscale chemical transport model; Der Einfluss von Flugzeugabgasen auf die Zusammensetzung der Atmosphaere: Untersuchungen mit einem mesoskaligen Chemie-Transport-Modell

    Energy Technology Data Exchange (ETDEWEB)

    Lippert, E.

    1996-12-31

    In the present work the impact of aircraft emissions on the atmospheric composition is studied using a mesoscale chemistry transport model. To simulate the impact of aircraft exhausts several modifications on the EURAD model system have been performed. The upper boundary of the model has been extended from 100 hPa up to 10 hPa. The vertical resolution of the model has been refined especially in tropopause altitudes extending the number of model layers from 15 to 29. Additionally the initialization and the treatment of the boundary conditions has been improved by coupling the trace gas concentration fields with the individual meteorological situation. To guarantee an adequate representation of the atmospheric chemistry the chemical mechanism CHEST has been developed and implemented into the chemistry transport model. CHEST treats the most important chemical processes of the troposphere and lower stratosphere. In the frame of the present work sensitivity studies with a box model and with the threedimensional chemistry transport model have been performed to investigate the impact of aircraft emissions upon the atmosphere. (KW) [Deutsch] In der vorliegenden Arbeit werden die Auswirkungen der Flugzeugemissionen auf die Zusammensetzung der Atmosphaere mit Hilfe eines mesoskaligen Chemie-Transport-Modells untersucht. Zur Simulation der Ausbreitung der Flugzeugabgase wurden am EURAD-Modell-System umfangreiche Veraenderungen vorgenommen. Der obere Modellrand des Chemie-Transport-Modells ist von 100 hPa auf 10 hPa erhoeht worden. Die vertikale Aufloesung des Modells wurde insbesondere im Tropopausenbereich durch eine Erhoehung der Gesamtzahl der Modellschichten von 15 auf 29 wesentlich verfeinert. Ausserdem ist die Initialisierung der Spurenstoffverteilung im Modell an die Dynamik gekoppelt worden. Dem Chemie-Transport-Modell stehen damit an die jeweilige meteorologische Situation angepasste Konzentrationsfelder zur Initialisierung und zur Behandlung der Fluesse durch den

  4. Technologies for the Reduction of Nitrogen Oxides Emissions

    Directory of Open Access Journals (Sweden)

    Paulica Arsenie

    2015-06-01

    Full Text Available When it comes to gas turbines, their main problem concerning pollutant emissions is represented by nitric oxides. Among other emissions, sulphur oxides being much reduced due to the use of liquid distilled and gas fuels with a low content of sulphur. Using water or steam injection became the favourite method during the '80s and especially the '90s since "dry" methods and catalytic reduction were both at the beginning of the development phase. Catalytic convertors have been used since the '80s and they are still used although the costs of renewing the catalyst are very high. In the last twenty years a gradual decrease has been registered on the limits of nitric oxides from 75 ppm to 25 ppm, and now the target is oriented towards the 9 ppm level. The evolution of burning technologies of combustion makes it possible to control the level of production of nitric oxides even from the source without being necessary to use "humid" methods. This, of course, opened the market for gas turbines because they can function even in areas with limited quality water reserves, such as maritime platforms and in the desert. In this paper, we are going to show that, although water injection is still used, "dry" control technologies of burning became favourite methods for the majority of users on the industrial power generators market. The great dependency between the creation of nitric oxides and the temperature reveals the effect of direct water or steam injection on reducing nitric oxides. Recent research showed that a reduction up to 85% of nitric oxides may be obtained by using the water or steam injection all together with the improvement of aerodynamic character of the burning room.

  5. The international research progress of Ammonia(NH3) emissions and emissions reduction technology in farmland ecosystem

    Science.gov (United States)

    Yang, W. Z.; Jiao, Y.

    2017-03-01

    NH3 is the important factor leading to the grey haze, and one of the main causes of environmental problems of serious ecological imbalance, such as acid rain and air quality deterioration. The fertilizer excessive application of the current farmland results NH3 emissions intensity greatly. In order to clear the farmland NH3 emissions research status and achievements, the literature of farmland NH3 emission related were retrievaled by the SCI journals and Chinese science citation database. Some factors of NH3 emission were analyzed such as soil factors, climate factors and farmland management measures. The research progress was inductived on farmland NH3 emission reduction technology. The results will help to clarify farmland NH3 emissions research progress. The theoretical guidance was provided on the future of farmland NH3 emissions research.

  6. Virtual bronchoscopy using image data sets from positron-emission-tomography and computed-tomography; Virtuelle Bronchoskopie mit Positronenemissions- und Computertomographie-Bilddaten

    Energy Technology Data Exchange (ETDEWEB)

    Englmeier, K.H.; Jovanovic, A.; Muehling, M.; Seemann, M.D. [Nuklearmedizinische Klinik und Poliklinik, rechts der Isar, Technische Univ. Muenchen (DE). Inst. fuer Medizinische Informatik (Germany)

    2006-07-01

    Cancer is the second leading cause of death in the western world. Early diagnosis and targeted therapy provide the basis for planning effective treatment. Diseases like cancer generally begin with alterations at the molecular level. When the number of affected cells reaches the threshold for anatomical change, the disease can already be so advanced that it is too late for successful treatment. Equally, morphological change is not necessarily associated with malignancy. Diagnosis and staging of cancer, and evaluation of therapeutic success, depend today to a large extent on imaging techniques like computed tomography (CT) and magnetic resonance tomography (MRT). However, these can only be used to identify anatomical changes in lesions. Increasingly, imaging techniques like positron emission tomography (PET) are used that are based at the molecular level. Functional imaging techniques detect functional changes in tissues that play a role in the diagnosis and staging of the disease. Virtual reality techniques, especially virtual endoscopy, have also become more important in PET-CT diagnostics. On the one hand, these methods enable simultaneous visualisation of morphological and metabolic relationships; on the other hand, the enormous amount of image data from PET-CT can be made understandable in an intuitive form with the aid of endoluminal three-dimensional (3-D) images and scenes. The prerequisite is that the image data from PET and CT are segmented after fusion using image analysis techniques and subsequently projected using a 3-D imaging system and virtual reality techniques. Together with the Department of Nuclear Medicine of the Technical University, Munich, a system has been developed for virtual bronchoscopy that is intended to improve diagnostic precision in cases of bronchial carcinoma. (orig.)

  7. Air Pollutant Emissions Projections for the Cement and Steel Industry in China and the Impact of Emissions Control Technologies

    Energy Technology Data Exchange (ETDEWEB)

    Hasanbeigi, Ali [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Khanna, Nina [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Price, Lynn [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

    2017-03-01

    China’s cement and steel industry accounts for approximately half of the world’s total cement and steel production. These two industries are two of the most energy-intensive and highest carbon dioxide (CO2)-emitting industries and two of the key industrial contributors to air pollution in China. For example, the cement industry is the largest source of particulate matter (PM) emissions in China, accounting for 40 percent of its industrial PM emissions and 27 percent of its total national PM emissions. The Chinese steel industry contributed to approximately 20 percent of sulfur dioxide (SO2) emissions and 27 percent of PM emissions for all key manufacturing industries in China in 2013. In this study, we analyzed and projected the total PM and SO2 emissions from the Chinese cement and steel industry from 2010–2050 under three different scenarios: a Base Case scenario, an Advanced scenario, and an Advanced EOP (end-of-pipe) scenario. We used bottom-up emissions control technologies data and assumptions to project the emissions. In addition, we conducted an economic analysis to estimate the cost for PM emissions reductions in the Chinese cement industry using EOP control technologies, energy efficiency measures, and product change measures. The results of the emissions projection showed that there is not a substantial difference in PM emissions between the Base Case and Advanced scenarios, for both the cement and steel industries. This is mainly because PM emissions in the cement industry caused mainly by production process and not the fuel use. Since our forecast for the cement production in the Base Case and Advanced scenarios are not too different from each other, this results in only a slight difference in PM emissions forecast for these two scenarios. Also, we assumed a similar share and penetration rate of control technologies from 2010 up to 2050 for these two scenarios for the cement and steel industry. However, the Advanced EOP

  8. Particle reduction strategies - PAREST. Evaluation of emission reduction scenarios using chemical transport calculations. Traffic model TREMOD and traffic model TREMOVE. Sub-report.; Strategien zur Verminderung der Feinstaubbelastung - PAREST. Bewertung von Emissionsminderungsszenarien mit Hilfe chemischer Transportberechnungen. Verkehrsmodell TREMOD und Verkehrsmodell TREMOVE. Teilbericht

    Energy Technology Data Exchange (ETDEWEB)

    Stern, Rainer [Freie Univ. Berlin (Germany). Inst. fuer Meteorologie, Troposphaerische Umweltforschung

    2013-06-15

    The calculation of transport emissions in PAREST project is made with traffic model TREMOD 4.17 (Transport Emission Model) used by the Federal Environment Agency based on the emission factors of HBEFA 2.1 (Handbook on Emission Factors for Road Traffic). For the PAREST reference scenario 2010-2020 (CLE scenario, ''current legislation'') TREMOD 4.17 was changed (TREMOD 4.17M) in such way that measures ''Introduction of Euro 5 and 6 limit levels for passenger cars and light commercial vehicles'', ''Introduction of a limit value stage Euro VI for heavy commercial vehicles'' and ''Existing truck tolls including promoting the purchase of low-emission heavy duty vehicles'' are integrated in the reference scenario and are no longer treated as an additional measure (Joerss et al., 2010). As an alternative to TREMOD 4.17M emission data sets were created for the project, in which the traffic emissions were calculated with the TREMOVE, version 2.7 (Kugler et al., 2010). TREMOVE is the traffic model used by the European Commission for the development of traffic scenarios. This report documents the differences between the immission distributions of PM10 and NO{sub 2}, resulting from the application of the European transport model. Considered are the reference 2005, which describes the current state for the year 2005 and the 2020 reference that describes the emission state in 2020 to be achieved. [German] Die Berechnung der Verkehrsemissionen erfolgt im PAREST-Projekt mit dem vom Umweltbundesamt verwendeten Verkehrsmodell TREMOD 4.17 (Transport Emission Model) auf der Grundlage der Emissionsfaktoren des HBEFA 2.1. Fuer das PAREST-Referenzszenario 2010-2020 (CLE-Szenario, ''current legislation'') wurde TREMOD 4.17 so veraendert (TREMOD 4.17M), dass die Massnahmen ''Einfuehrung der Grenzwertstufen Euro 5 und 6 fuer Pkw und leichte Nutzfahrzeuge'', &apos

  9. Compilation of an emissions data base for Europe, base year 1995, and development of large scale emissions reduction scenarios for the chemical transport model REM/CALGRID. Final report; Modellierung und Puefung von Strategien zur Verminderung der Belastung durch Ozon. Erstellung einer europaweiten Emissionsdatenbasis mit Bezugsjahr 1995 und die Erarbeitung von Emissionsszenarien fuer die grossraeumigen Ausbreitungsrechnungen mit REM/CALGRID. Schlussbericht

    Energy Technology Data Exchange (ETDEWEB)

    Stern, R.

    2003-02-01

    The report describes the emissions data base created by TNO, Netherlands, which is used for the chemical transport model REM/CALGRID. Base year is 1995. The data base covers Europe with grids of 0.5 x 0.25 lat long and contains the anthropogenic emissions of SO{sub 2}, NO{sub x}, NMVOC, CO, CH{sub 4}, NH{sub 3}, PM{sub 10}, PM{sub 2.5}. The data base uses CORINAIR and CEPMEIP information and the SNAP source group classifiction of CORINAIR. For emissions scenario calculations, 3 scenarios were developed based on information provided by IIASA: situation 2005, CLE-scenario 2010 and MFR-scenario 2010. The CLE-scenario is based on the current legislation and the national emissions ceilings, NEC. The MFR-scenario describes the maximum feasible reduction measures. (orig.)

  10. Mercury Emission Control Technologies for PPL Montana-Colstrip Testing

    Energy Technology Data Exchange (ETDEWEB)

    John P. Kay; Michael L. Jones; Steven A. Benson

    2007-04-01

    The Energy & Environmental Research Center (EERC) was asked by PPL Montana LLC (PPL) to provide assistance and develop an approach to identify cost-effective options for mercury control at its coal-fired power plants. The work conducted focused on baseline mercury level and speciation measurement, short-term parametric testing, and week long testing of mercury control technology at Colstrip Unit 3. Three techniques and various combinations of these techniques were identified as viable options for mercury control. The options included oxidizing agents or sorbent enhancement additives (SEAs) such as chlorine-based SEA1 and an EERC proprietary SEA2 with and without activated carbon injection. Baseline mercury emissions from Colstrip Unit 3 are comparatively low relative to other Powder River Basin (PRB) coal-fired systems and were found to range from 5 to 6.5 g/Nm3 (2.9 to 3.8 lb/TBtu), with a rough value of approximately 80% being elemental upstream of the scrubber and higher than 95% being elemental at the outlet. Levels in the stack were also greater than 95% elemental. Baseline mercury removal across the scrubber is fairly variable but generally tends to be about 5% to 10%. Parametric results of carbon injection alone yielded minimal reduction in Hg emissions. SEA1 injection resulted in 20% additional reduction over baseline with the maximum rate of 400 ppm (3 gal/min). Week long testing was conducted with the combination of SEA2 and carbon, with injection rates of 75 ppm (10.3 lb/hr) and 1.5 lb/MMacf (40 lb/hr), respectively. Reduction was found to be an additional 30% and, overall during the testing period, was measured to be 38% across the scrubber. The novel additive injection method, known as novel SEA2, is several orders of magnitude safer and less expensive than current SEA2 injection methods. However, used in conjunction with this plant configuration, the technology did not demonstrate a significant level of mercury reduction. Near-future use of this

  11. Control technology for radioactive emissions to the atmosphere at US Department of Energy facilities

    Energy Technology Data Exchange (ETDEWEB)

    Moore, E.B.

    1984-10-01

    The purpose of this report is to provide information to the US Environmental Protection agency (EPA) on existing technology for the control of radionuclide emissions into the air from US Department of Energy (DOE) facilities, and to provide EPA with information on possible additional control technologies that could be used to further reduce these emissions. Included in this report are generic discussions of emission control technologies for particulates, iodine, rare gases, and tritium. Also included are specific discussions of existing emission control technologies at 25 DOE facilities. Potential additional emission control technologies are discussed for 14 of these facilities. The facilities discussed were selected by EPA on the basis of preliminary radiation pathway analyses. 170 references, 131 figures, 104 tables.

  12. MIT-CSR XIS Project

    Science.gov (United States)

    1998-01-01

    This report outlines the proposers' progress toward MIT's contribution to the X-Ray Imaging Spectrometer (XIS) experiment on the Japanese ASTRO-E mission. The report discusses electrical system design, mechanical system design, and ground support equipment.

  13. Die Last mit der Lust

    Directory of Open Access Journals (Sweden)

    Lutz Sauerteig

    2004-03-01

    Full Text Available Robert Jütte legt mit Lust ohne Last eine umfassende, allgemeinverständliche und spannend zu lesende Geschichte der Empfängnisverhütung von der Antike bis in die unmittelbare Gegenwart vor.

  14. Kleben von Kunststoff mit Metall

    CERN Document Server

    Brockmann, W; Käufer, H

    1989-01-01

    Das Buch behandelt das Kleben von Kunststoffen mit Metallen in einer fur den Praktiker verstandlichen und umsetzbaren Form. Es leitet zu Klebeverfahren an, die optimale Ergebnisse hinsichtlich Qualitat, Dauerhaftigkeit und Wirtschaftlichkeit liefern.

  15. Spillerum og mit eget rum

    DEFF Research Database (Denmark)

    2014-01-01

    Undervisningsmaterialet Spillerum udviklet som APP til Ipad med interaktive muligheder. Spillerum som APP - et interaktivt undervisningsmateriale, hvor man ud over at bruge det originale materiale Spillerum elektronisk kan skabe sit eget billedbaserede rum "Mit eget rum" som udgangspunkt for dialog....

  16. Investigation of dynamic load changes of a combined cycle power plant with circulating pressurized fluidized bed using a simulation model; Untersuchungen zum dynamischen Lastaenderungsverhalten eines Kombi-Kraftwerks mit zirkulierender Druckwirbelschicht mit Hilfe eines Simulationsmodells

    Energy Technology Data Exchange (ETDEWEB)

    Bockamp, S.; Krumm, W.

    2001-07-01

    Fluidized bed combustion technology offers high efficient power plants with low emissions using coal, biomass or waste as fuel input. Mathematical models support the optimisation and design of power plants. The mathematical fluidized bed system model developed at the Institut fuer Energietechnik, Universitaet Siegen, allows the simulation of steady state or dynamic process operation behaviour. This model is used for detailed examining of the overall combined cycle power plant and the interactions between the single components gas turbine, furnace and water-/steam cycle. The described simulation model presented in this paper is applied for the determination of the transient operation behaviour of a combined cycle power plant based on pressurized circulating fluidized bed combustion. The effects of a step function load change on the temperature profile, the emissions and on process reaction of water/steam cycle and on gas turbine is analysed and discussed in detail at different component outlets. (orig.) [German] Das Kombi-Kraftwerk mit zirkulierender Druckwirbelschichtfeuerung stellt ein effizientes und emissionsarmes Konzept dar. Neben den wirbelschichtinhaerenten Eigenschaften wie geringerer Schadstoffbildung durch niedrige Feuerraumtemperaturen und der integrierten Schadstoffreduktion durch die Zugabe von Zuschlagstoffen verspricht die druckaufgeladenen Variante aufgrund der hohen Querschnittsbelastung eine kompakte Bauart sowie einen fuer die Verstromung von Kohlen hohen Wirkungsgrad. Kohle kann mit diesem Verfahren direkt innerhalb eines Gasturbinenprozesses genutzt werden. Mit Hilfe der mathematischen Modellbildung koennen die dynamischen Auswirkungen auf das Gesamtsystem Kombi-Kraftwerk untersucht werden. (orig.)

  17. Verbalsuffixe mit Liquida

    Directory of Open Access Journals (Sweden)

    Marina Zorman

    1995-12-01

    Full Text Available Der vorliegende Beitrag stellt eine Zusammenfassung bzw. vervollständigte Ver­ sion einiger Kapitel der Magisterarbeit der Autorin mit dem Titel Expressive Wort­ bildung beim Verb (Ältere, wahrscheinlich ererbte Kombinationen -V/C- + -r/l- - das Grundtypus -dr- - im Slowenischen dar. Die wesentlichen Erkenntnisse der Arbeit hinsichtlich der morphologischen und semantischen Gestalt derartiger Verben, ihrer dialektologischen Verbreitung und der Genese, Funktion und Austauschbarkeit dieser Suffixe sollen unter dem Titel "Ekspresivne glagolske pripone tipa -V/C + -r/l-" in den "Razprave XV II. razreda SAZU" (Dissertationes Classis II, XV. Ljubljana, Academia scientiarium et artium Slovenica (in Druck veröffentlicht werden, deshalb werden sie hier nur so weit aufgenommen, wie das für das Verständnis des behandelten Gegen­ stands unbedingt notwendig ist. Eingehender werden Fragen erortert, die im erwähnten Artikel nicht behandelt werden, die jedoch auch für andere Linguisten interessant sein könnten. So ist der vorliegende Beitrag in vier Teile gegliedert

  18. Environmental Emissions From Energy Technology Systems: The Total Fuel Cycle

    Energy Technology Data Exchange (ETDEWEB)

    San Martin, Robert L.

    1989-04-01

    This is a summary report that compares emissions during the entire project life cycle for a number of fossil-fueled and renewable electric power systems, including geothermal steam (probably modeled after The Geysers). The life cycle is broken into Fuel Extraction, Construction, and Operation. The only emission covered is carbon dioxide. (DJE 2005)

  19. Reduction of vaporous emissions during transport of petrol and mineral oil products by river tank ships (20. BImSchV); Verminderung gasfoermiger Emissionen beim Transport von Ottokraftstoffen und Mineraloelprodukten mit Binnenschiffen (20. BImSchV)

    Energy Technology Data Exchange (ETDEWEB)

    Schaefer, K.; Hoffmann, H.; Emeis, S.; Jahn, C.; Sedlmaier, A.; Wilhelm, H.; Dormuth, I.

    2001-11-01

    The gas-free ventilation of the tanks of river tank ships by the common praxis to ventilate the tank atmosphere into ambient air is a big emission source of VOCs and a strong deterioration of air quality. It was shown during several measurement campaigns that the ventilation of the tank atmosphere of river tank ships via the loading / unloading pipes into the land-site vapour recovery unit is a technical solution. The measured emission source strengths during this type of ventilation are of the same amount as the measured emission source strengths during loading and unloading of petrol and are caused by attachment and detachment of loading / unloading pipes only. Furthermore, the concentrations of petrol in the tank atmosphere were measured by the PTB during these experiments. As result of the investigations a leaflet as instruction of environment friendly ventilation of tank atmosphere of river tank ships for the inland sailors and operators of tank storage plants was composed. On the basis of an inquiry of the available vapour recovery units the required capacity of land-site vapour recovery units for the replacement of all ventilation of tank atmosphere to open air was estimated. The capacity of the available vapour recovery units is too low for a preferably short time period of tank atmosphere ventilation. Solving this problem not only the enhancement of the capacity of the available vapour recovery units up to a capacity of 2,200 m{sup 3}/h must be considered but their availability at loading / unloading points of petrol as well as the availability of berthing place must be taken into account also. The necessary enhancement of the capacity and the number of possible new installations of vapour recovery units cannot be defined now because a new amendment for the execution of the 20. BImSchV came into force on 25 August 2001 which allows the ventilation of tank atmosphere of river tank ships to open air under certain conditions until 31 December 2005. To draw

  20. Regional on-road vehicle running emissions modeling and evaluation for conventional and alternative vehicle technologies.

    Science.gov (United States)

    Frey, H Christopher; Zhai, Haibo; Rouphail, Nagui M

    2009-11-01

    This study presents a methodology for estimating high-resolution, regional on-road vehicle emissions and the associated reductions in air pollutant emissions from vehicles that utilize alternative fuels or propulsion technologies. The fuels considered are gasoline, diesel, ethanol, biodiesel, compressed natural gas, hydrogen, and electricity. The technologies considered are internal combustion or compression engines, hybrids, fuel cell, and electric. Road link-based emission models are developed using modal fuel use and emission rates applied to facility- and speed-specific driving cycles. For an urban case study, passenger cars were found to be the largest sources of HC, CO, and CO(2) emissions, whereas trucks contributed the largest share of NO(x) emissions. When alternative fuel and propulsion technologies were introduced in the fleet at a modest market penetration level of 27%, their emission reductions were found to be 3-14%. Emissions for all pollutants generally decreased with an increase in the market share of alternative vehicle technologies. Turnover of the light duty fleet to newer Tier 2 vehicles reduced emissions of HC, CO, and NO(x) substantially. However, modest improvements in fuel economy may be offset by VMT growth and reductions in overall average speed.

  1. Scratch that: MIT's Mitchel Resnick Says Kids Should Do It for Themselves

    Science.gov (United States)

    Traylor, Scott

    2008-01-01

    Mitchel Resnick is a researcher, inventor, and professor at MIT's Media Laboratory in Cambridge, MA, and the founder of the Lifelong Kindergarten Group at MIT. He is the lead innovator behind many cutting-edge learning technologies and projects for children, including the Computer Clubhouse, PicoCrickets, and the wildly successful consumer…

  2. Scratch that: MIT's Mitchel Resnick Says Kids Should Do It for Themselves

    Science.gov (United States)

    Traylor, Scott

    2008-01-01

    Mitchel Resnick is a researcher, inventor, and professor at MIT's Media Laboratory in Cambridge, MA, and the founder of the Lifelong Kindergarten Group at MIT. He is the lead innovator behind many cutting-edge learning technologies and projects for children, including the Computer Clubhouse, PicoCrickets, and the wildly successful consumer…

  3. Kasuistik 2: 54-jähriger LKW-Fernfahrer mit Verdacht auf Schilddrüsenunterfunktion

    Directory of Open Access Journals (Sweden)

    Jockenhövel F

    2003-01-01

    Full Text Available 54-jähriger LKW-Fernfahrer mit Leistungsschwäche, Rückenschmerzen, erektiler Dysfunktion, vermehrter Müdigkeit. Wird vom Hausarzt mit der Frage einer eventuellen Schilddrüsenunterfunktion (Hypothyreose vorgestellt. Keine relevanten Vorerkrankungen, gelegentlich Voltaren als Medikation gegen Rückenschmerzen. Auf Befragen erektile Dysfunktion mit mangelnder Rigidität zur Emission, bzw. zu schnellem Verlust der Rigidität.

  4. Hydropower pump storage - AC- excitation using ANPC technology; AC-Erregung mit ANPC-Stromrichtertechnologie. Einsatz von ANPC-Stromrichten fuer Pumpspeicherwerke

    Energy Technology Data Exchange (ETDEWEB)

    Haemmerli, A.; Odegard, B. [ABB Schweiz AG, Turgi (Switzerland)

    2010-07-01

    This article takes a look at the use of Active Neutral Point Clamped (ANPC) technology in power converters used for the control of pump/generators as used in hydropower installations. The functioning of the electronics of such converters and their operation are discussed in detail. As an example, the authors also discusses the use of such technology in a pump-storage hydropower facility in Slovenia. The limited frequency variability made available by the ANPC technology is discussed for the optimal operation of the turbines. The electronics also make it possible to optimise the operation in pump mode too: Here, the authors state that the optimal speed is somewhat higher than mains frequency.

  5. Life cycle greenhouse gas emissions of current oil sands technologies: GHOST model development and illustrative application.

    Science.gov (United States)

    Charpentier, Alex D; Kofoworola, Oyeshola; Bergerson, Joule A; MacLean, Heather L

    2011-11-01

    A life cycle-based model, GHOST (GreenHouse gas emissions of current Oil Sands Technologies), which quantifies emissions associated with production of diluted bitumen and synthetic crude oil (SCO) is developed. GHOST has the potential to analyze a large set of process configurations, is based on confidential oil sands project operating data, and reports ranges of resulting emissions, improvements over prior studies, which primarily included a limited set of indirect activities, utilized theoretical design data, and reported point estimates. GHOST is demonstrated through application to a major oil sands process, steam-assisted gravity drainage (SAGD). The variability in potential performance of SAGD technologies results in wide ranges of "well-to-refinery entrance gate" emissions (comprising direct and indirect emissions): 18-41 g CO(2)eq/MJ SCO, 9-18 g CO(2)eq/MJ dilbit, and 13-24 g CO(2)eq/MJ synbit. The primary contributor to SAGD's emissions is the combustion of natural gas to produce process steam, making a project's steam-to-oil ratio the most critical parameter in determining GHG performance. The demonstration (a) illustrates that a broad range of technology options, operating conditions, and resulting emissions exist among current oil sands operations, even when considering a single extraction technology, and (b) provides guidance about the feasibility of lowering SAGD project emissions.

  6. Driving into Euroland with AdBlue. Environmental friendly diesel technology for utility vehicles; Mit AdBlue ins Euroland. Umweltfreundliche Dieseltechnologie fuer Nutzfahrzeuge

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2006-07-01

    The SCR-diesel technology introduced by DaimlerChrysler has already established itself successfully in the field of utility vehicles under the name BlueTec. This drive technique already meets today the exhaust gas limiting values of tomorrow and is now also available for buses. (orig.)

  7. Soil carbon sequestration and biochar as negative emission technologies.

    Science.gov (United States)

    Smith, Pete

    2016-03-01

    Despite 20 years of effort to curb emissions, greenhouse gas (GHG) emissions grew faster during the 2000s than in the 1990s, which presents a major challenge for meeting the international goal of limiting warming to carbon capture and storage and afforestation/deforestation, showed that all NETs have significant limits to implementation, including economic cost, energy requirements, land use, and water use. In this paper, I assess the potential for negative emissions from soil carbon sequestration and biochar addition to land, and also the potential global impacts on land use, water, nutrients, albedo, energy and cost. Results indicate that soil carbon sequestration and biochar have useful negative emission potential (each 0.7 GtCeq. yr(-1) ) and that they potentially have lower impact on land, water use, nutrients, albedo, energy requirement and cost, so have fewer disadvantages than many NETs. Limitations of soil carbon sequestration as a NET centre around issues of sink saturation and reversibility. Biochar could be implemented in combination with bioenergy with carbon capture and storage. Current integrated assessment models do not represent soil carbon sequestration or biochar. Given the negative emission potential of SCS and biochar and their potential advantages compared to other NETs, efforts should be made to include these options within IAMs, so that their potential can be explored further in comparison with other NETs for climate stabilization.

  8. MIT Mints a Valuable New Form of Academic Currency

    Science.gov (United States)

    Carey, Kevin

    2012-01-01

    The Massachusetts Institute of Technology (MIT) has invented or improved many world-changing things--radar, information theory, and synthetic self-replicating molecules, to name a few. Last month the university announced, to mild fanfare, an invention that could be similarly transformative, this time for higher education itself. It is called MITx.…

  9. MIT Orients Course Materials Online to K-12

    Science.gov (United States)

    Cavanagh, Sean

    2008-01-01

    Many science and mathematics educators across the country are taking advantage of a Web site created by the Massachusetts Institute of Technology (MIT), the famed research university located in Cambridge, Massachusetts, which offers free video, audio, and print lectures and course material taken straight from the school's classes. Those resources…

  10. MIT Mints a Valuable New Form of Academic Currency

    Science.gov (United States)

    Carey, Kevin

    2012-01-01

    The Massachusetts Institute of Technology (MIT) has invented or improved many world-changing things--radar, information theory, and synthetic self-replicating molecules, to name a few. Last month the university announced, to mild fanfare, an invention that could be similarly transformative, this time for higher education itself. It is called MITx.…

  11. Robotisches Elektromobil mit kamerabasiertem Autonomieansatz

    OpenAIRE

    2011-01-01

    Autonomes Fahren erfährt in den vergangenen Jahren durch verschiedene Forschungsprojekte ein gesteigertes öffentliches Interesse. Dabei werden meist herkömmliche Pkw mit großem Aufwand umgebaut und mit Dachaufbauten voller Sensorik bestückt. Der Vormarsch der Elektromobilität bietet die Chance für grundlegend neue Fahrzeugkonzepte. Löst man sich von klassischen Ansätzen, so ist es möglich, die Autonomie von Anfang an in die Automobilarchitektur hinsichtlich IT- und Sensor-Systemen, Energieman...

  12. Coal-fueled diesel technology development Emissions Control

    Energy Technology Data Exchange (ETDEWEB)

    Van Kleunen, W.; Kaldor, S.; Gal, E.; Mengel, M.; Arnold, M.

    1994-01-01

    GEESI Emissions Control program activity ranged from control concept testing of 10 CFM slipstream from a CWS fuel single cylinder research diesel engine to the design, installation, and operation of a full-size Emissions Control system for a full-size CWS fuel diesel engine designed for locomotive operation.Early 10 CFM slipstream testing program activity was performed to determine Emissions Characteristics and to evaluate Emissions Control concepts such a Barrier filtration, Granular bed filtration, and Cyclone particulate collection for reduction of particulate and gaseous emissions. Use of sorbent injection into the engine exhaust gas upstream of the barrier filter or use of sorbent media in the granular bed filter were found to provide reduction of exhaust gas SO{sub 2} and NO{sub x} in addition to collection of ash particulate. Emergence of the use of barrier filtration as a most practical Emissions Control concept disclosed a need to improve cleanability of the filter media in order to avoid reduction of turbocharger performance by excessive barrier filter pressure drop. The next progression of program activity, after the slipstream feasibility state, was 500 CFM cold flow testing of control system concepts. The successful completion of 500 CFM cold flow testing of the Envelope Filter led to a subsequent progression to a similar configuration Envelope Filter designed to operate at 500 CFM hot gas flow from the CWS fuel research diesel engine in the GETS engine test laboratory. This Envelope Filter included the design aspect proven by cold flow testing as well as optimization of the selection of the installed filter media.

  13. Environmentally friendly heat from modern heating technology. Optimal heat distribution using jet pumps; Umweltschonende Waerme durch moderne Heiztechnik. Optimale Waermeverteilung mit Strahlpumpen

    Energy Technology Data Exchange (ETDEWEB)

    Kilpper, Renate; Baelz, Uwe [W. Baelz und Sohn GmbH und Co., Heilbronn (Germany)

    2011-07-15

    The wood chip fired district heating plant in Olang in South Tyrol produces environmentally friendly heat from domestic wood. Its heat is delivered directly to the consumer using electricity-saving, durable jet pumps in combination with reliable, low-maintenance heating equipment as well as modern control technology. Consumers can regulate the jet pumps individually and use the heat optimally according to their demand.

  14. Adoption of Emissions Abating Technologies by U.S. Electricity Producing Firms Under the SO2 Emission Allowance Market

    Science.gov (United States)

    Creamer, Gregorio Bernardo

    The objective of this research is to determine the adaptation strategies that coal-based, electricity producing firms in the United States utilize to comply with the emission control regulations imposed by the SO2 Emissions Allowance Market created by the Clean Air Act Amendment of 1990, and the effect of market conditions on the decision making process. In particular, I take into consideration (1) the existence of carbon contracts for the provision of coal that may a affect coal prices at the plant level, and (2) local and geographical conditions, as well as political arrangements that may encourage firms to adopt strategies that appear socially less efficient. As the electricity producing sector is a regulated sector, firms do not necessarily behave in a way that maximizes the welfare of society when reacting to environmental regulations. In other words, profit maximization actions taken by the firm do not necessarily translate into utility maximization for society. Therefore, the environmental regulator has to direct firms into adopting strategies that are socially efficient, i.e., that maximize utility. The SO 2 permit market is an instrument that allows each firm to reduce marginal emissions abatement costs according to their own production conditions and abatement costs. Companies will be driven to opt for a cost-minimizing emissions abatement strategy or a combination of abatement strategies when adapting to new environmental regulations or markets. Firms may adopt one or more of the following strategies to reduce abatement costs while meeting the emission constraints imposed by the SO2 Emissions Allowance Market: (1) continue with business as usual on the production site while buying SO2 permits to comply with environmental regulations, (2) switch to higher quality, lower sulfur coal inputs that will generate less SO2 emissions, or (3) adopting new emissions abating technologies. A utility optimization condition is that the marginal value of each input

  15. METEV: Measurement Technologies for Emissions from Ethanol Fuelled Vehicles

    Energy Technology Data Exchange (ETDEWEB)

    Sandtroem-Dahl, Charlotte

    2009-11-15

    The interest of using alcohols, and especially ethanol, as vehicle fuel is high in Sweden. The advantages are many, such as; being renewable, the ethanol can be produced locally and it is easily mixed with gasoline. Alcohol fuels are considered to be a substantial part of the alternative fuel market, especially in Brazil, USA and Sweden. With this growing interest it is of most importance to investigate the emission performance of vehicles fuelled with alcohols. The focus in this study is on measurement and calculation of hydrocarbon emissions. The emission regulations in different countries have different ways to treat alcohol fuelled vehicles. When alcohols are used as blending components in gasoline, uncombusted alcohols from the fuel are emitted in the exhaust in various amounts. If a Flame Ionization Detector (FID) is used to measure hydrocarbons, the uncombusted alcohol will be included in the measurement. The alcohol is, per definition, however not a hydrocarbon (hydrocarbons contains only hydrogen and carbon). In the US regulations, the alcohol content is measured separately, and the FID measurement is adjusted for the alcohol part. This is not performed in the European regulations. The aim of this project is to highlight the need for a discussion regarding the methodology for measuring hydrocarbon and alcohol emissions from flexible fuelled vehicles operating on alcohol fuel blends.

  16. Development of air conditioning technologies to reduce CO2 emissions in the commercial sector

    Science.gov (United States)

    Yoshida, Yukiko

    2006-01-01

    Background Architectural methods that take into account global environmental conservation generally concentrate on mitigating the heat load of buildings. Here, we evaluate the reduction of carbon dioxide (CO2) emissions that can be achieved by improving heating, ventilating, and air conditioning (HVAC) technologies. Results The Climate Change Research Hall (CCRH) of the National Institute for Environmental Studies (NIES) is used as a case study. CCRH was built in line with the "Green Government Buildings" program of the Government Buildings Department at the Ministry of Land, Infrastructure and Transport in Japan. We have assessed the technology used in this building, and found that there is a possibility to reduce energy consumption in the HVAC system by 30%. Conclusion Saving energy reduces CO2 emissions in the commercial sector, although emission factors depend on the country or region. Consequently, energy savings potential may serve as a criterion in selecting HVAC technologies with respect to emission reduction targets. PMID:17062161

  17. Development of air conditioning technologies to reduce CO2 emissions in the commercial sector

    Directory of Open Access Journals (Sweden)

    Yoshida Yukiko

    2006-10-01

    Full Text Available Abstract Background Architectural methods that take into account global environmental conservation generally concentrate on mitigating the heat load of buildings. Here, we evaluate the reduction of carbon dioxide (CO2 emissions that can be achieved by improving heating, ventilating, and air conditioning (HVAC technologies. Results The Climate Change Research Hall (CCRH of the National Institute for Environmental Studies (NIES is used as a case study. CCRH was built in line with the "Green Government Buildings" program of the Government Buildings Department at the Ministry of Land, Infrastructure and Transport in Japan. We have assessed the technology used in this building, and found that there is a possibility to reduce energy consumption in the HVAC system by 30%. Conclusion Saving energy reduces CO2 emissions in the commercial sector, although emission factors depend on the country or region. Consequently, energy savings potential may serve as a criterion in selecting HVAC technologies with respect to emission reduction targets.

  18. Development of air conditioning technologies to reduce CO2 emissions in the commercial sector.

    Science.gov (United States)

    Yoshida, Yukiko

    2006-10-25

    Architectural methods that take into account global environmental conservation generally concentrate on mitigating the heat load of buildings. Here, we evaluate the reduction of carbon dioxide (CO2) emissions that can be achieved by improving heating, ventilating, and air conditioning (HVAC) technologies. The Climate Change Research Hall (CCRH) of the National Institute for Environmental Studies (NIES) is used as a case study. CCRH was built in line with the "Green Government Buildings" program of the Government Buildings Department at the Ministry of Land, Infrastructure and Transport in Japan. We have assessed the technology used in this building, and found that there is a possibility to reduce energy consumption in the HVAC system by 30%. Saving energy reduces CO2 emissions in the commercial sector, although emission factors depend on the country or region. Consequently, energy savings potential may serve as a criterion in selecting HVAC technologies with respect to emission reduction targets.

  19. MIT - Mighty Steps toward Energy Sustainability

    Energy Technology Data Exchange (ETDEWEB)

    Robinson, Alastair [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Regnier, Cindy [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Settlemyre, Kevin [Sustainable IQ, Inc., Arlington, MA (United States); Bosnic, Zorana [HOK, San Francisco, CA (United States)

    2012-07-01

    Massachusetts Institute of Technology (MIT) partnered with the U.S. Department of Energy (DOE) to develop and implement solutions to retrofit existing buildings to reduce energy consumption by at least 30% as part of DOE’s Commercial Building Partnerships (CBP) Program.1 Lawrence Berkeley National Laboratory (LBNL) provided technical expertise in support of this DOE program. MIT is one of the U.S.’s foremost higher education institutions, occupying a campus that is nearly 100 years old, with a building floor area totaling more than 12 million square feet. The CBP project focused on improving the energy performance of two campus buildings, the Ray and Maria Stata Center (RMSC) and the Building W91 (BW91) data center. A key goal of the project was to identify energy saving measures that could be applied to other buildings both within MIT’s portfolio and at other higher education institutions. The CBP retrofits at MIT are projected to reduce energy consumption by approximately 48%, including a reduction of around 72% in RMSC lighting energy and a reduction of approximately 55% in RMSC server room HVAC energy. The energy efficiency measure (EEM) package proposed for the BW91 data center is expected to reduce heating, ventilation, and air-conditioning (HVAC) energy use by 30% to 50%, depending on the final air intake temperature that is established for the server racks. The RMSC, an iconic building designed by Frank Gehry, houses the Computer Science and Artificial Intelligence Laboratory, the Laboratory for Information and Decision Systems, and the Department of Linguistics and Philosophy.

  20. Dictionary food technology. English-German. With about 10,000 entries. Fachwoerterbuch Lebensmitteltechnologie. Englisch-Deutsch. Mit etwa 10000 Wortstellen

    Energy Technology Data Exchange (ETDEWEB)

    Bratfisch, R.

    1992-01-01

    This dictionary contains about 10,000 entries of the following fields: Raw Materials: Meat - fish - milk - cereals - fruit and vegetables - sugar and starch - oils and fats - tobacco - spices - cocoa - coffee - tea - water. Additives: Colouring agents - aroma substances - preservatives etc. Technology and Equipment of Food Processing: General and specific processing methods - food processing machinery - biotechnology - safety appliances - production hygiene, cleaning appliances - waste-water treatment - waste recovery - environmental protection. Filling and Packaging, Transportation, Cooling and Storage, Quality Assurance, Food Legislation. Appendix: Field-specific British and American weights and measures. (orig.).

  1. Digital station control technology with system bus in RWE's transmission network; Digitale Stationsleittechnik mit Systembus im RWE-Transportnetz

    Energy Technology Data Exchange (ETDEWEB)

    Tessmer, Kai [Siemens Energy Automation, Dortmund (Germany). RWE Transportnetzprojekte; Friedrich, Wolfgang [Helmut Mauell GmbH, Velbert (Germany); Krueger, Roland; Ruemenapp, Peter [RWE Westfalen Weser Ems Netzservice GmbH (Germany). Bereich Grundsatzplanung Sekundaertechnik

    2009-10-15

    As early as the 1990s RWE began equipping its transmission network stations with digital station control technology, this involving control station linkage and a proprietary station bus. Ten years later, however, a market analysis taking account of the costs and the technical possibilities found that the use of a standardised RWE-profile station bus in accordance with 60870-5-104 offers substantial advantages. Integration tests followed to determine how this might be implemented. The experiences gained in these tests will go into the development of a migration concept for the introduction of IEC 61850 in transmission network stations.

  2. Small-scale hydropower with gravitation water vortex. New technology for the use of water power; Kleinwasserkraftwerk mit Gravitationswirbel. Neue Technologie zur Nutzung der Wasserkraft

    Energy Technology Data Exchange (ETDEWEB)

    Rathke, Joern [Kompetenzzentrum Holz GmbH, Linz (Austria); Zotloeterer, Franz [Unternehmen Zotloeterer, Obergrafendorf (Austria); Wendland, Martin [Univ. fuer Bodenkultur, Wien (Austria)

    2012-07-01

    For the development and exploitation of new, alternative and renewable energy sources mainly biomass and wind energy are taken into consideration. Nevertheless, the usage of hydro power, especially small scale hydro power, has a high development potential. Still it is because of ecological, economical and social reasons restricted in its acceptance. In this study a new technology, the gravitation water vortex power plant, is presented. This type of hydro power plant is characterized by a small effect on rivers, positive influence on flora and fauna and the profitable usability with small head water.

  3. Fossil furnace with solar support. Part 1. Paths towards a forward-looking plant technology; Fossile Heizkessel mit solarer Unterstuetzung. Teil 1. Wege zu einer zukunftsfaehigen Anlagentechnik

    Energy Technology Data Exchange (ETDEWEB)

    Wagnitz, M. [Zentralverband Sanitaer Heizung Klima, Potsdam (Germany)

    2007-03-15

    Kyoto, climate targets, energy price discussions - the list of keywords is long. However the effects are mostly unclear. The only thing, which is for sure, nothing will remain as it is.This three-part series explains, how the different heating systems can be incorporated into the logic of the new Regulation for Renewable Energy and into which direction the development in the field of plant technology will go. Different systems for one-family houses are compared with each other as an example. (orig.)

  4. Chemical characterization of emissions from advanced technology light-duty vehicles

    Science.gov (United States)

    Graham, Lisa

    Results of detailed emissions measurements of seven 2000 model year advanced technology vehicles are reported. Six of the seven vehicles were imported from Europe and Japan and are not yet available for sale in Canada. Three of the vehicles were with direct injection diesel (DDI) technology, three with gasoline direct injection (GDI) technology and one vehicle was a gasoline-electric hybrid. It is expected that vehicles with these technologies will be forming a larger fraction of the Canadian light-duty vehicle fleet in the coming years in response to requirements to reduce greenhouse gas emissions from the transportation sector in support of Canada's ratification of the Kyoto Protocol; and as a result of improving fuel quality (most notably reducing the sulphur content of both diesel and gasoline). It is therefore important to understand the potential impacts on air quality of such changes in the composition of the vehicle fleet. The emissions from these vehicles were characterized over four test cycles representing different driving conditions. Samples of the exhaust were collected for determining methane, non-methane hydrocarbons and carbonyl compounds for the purposes of comparing ozone-forming potential of the emissions. Although these vehicles were not certified to Canadian emissions standards as tested, all vehicles met the then current Tier 1 emission standards, except for one diesel vehicle which did not meet the particulate matter (PM) standard. The DDI vehicles had the highest NO X emissions, the highest specific reactivity and the highest ozone-forming potential of the vehicles tested. When compared to conventional gasoline vehicles, the ozone-forming potential was equivalent. The GDI vehicles had lower NO X emissions, lower specific reactivity and lower ozone-forming potential than the conventional gasoline vehicles. Both the diesel and GDI vehicles had higher PM emissions than the conventional gasoline vehicles. The gasoline-electric hybrid vehicle

  5. MIT January Operational Internship Experience

    Science.gov (United States)

    Bosanac, Natasha; DeVivero, Charlie; James, Jillian; Perez-Martinez, Carla; Pino, Wendy; Wang, Andrew; Willett, Ezekiel; Williams, Kwami

    2010-01-01

    This viewgraph presentation describes the MIT January Operational Internship Experience (JOIE) program. The topics include: 1) Landing and Recovery; 2) Transportation; 3) Shuttle Processing; 4) Constellation Processing; 5) External Tank; 6) Launch Pad; 7) Ground Operations; 8) Hypergolic Propellants; 9) Environmental; 10) Logistics; 11) Six Sigma; 12) Systems Engineering; and 13) Human Factors.

  6. Current and future technological trends in positron emission tomography.

    Science.gov (United States)

    Karp, J S; Freifelder, R

    1992-04-01

    Current trends in positron emission tomography (PET) instrumentation are examined, with an emphasis on providing information suitable to the prospective PET user. Basic principles underlying PET are explained and information on performance measurements, techniques, and quantitation are given in order to allow the user to compare and contrast different types of PET scanners. These scanner designs are described. Specific examples are given and the combination of PET with other modalities is discussed.

  7. Control of mercury emissions: policies, technologies, and future trends

    OpenAIRE

    Rhee, Seung-Whee

    2015-01-01

    Seung-Whee Rhee Department of Environmental Engineering, Kyonggi University, Suwon, Republic of Korea Abstract: Owing to the Minamata Convention on Mercury and the Global Mercury Partnership, policies and regulations on mercury management in advanced countries were intensified by a mercury phaseout program in the mercury control strategy. In developing countries, the legislative or regulatory frameworks on mercury emissions are not established specifically, but mercury management is designed...

  8. Control of mercury emissions: policies, technologies, and future trends

    OpenAIRE

    Rhee, Seung-Whee

    2015-01-01

    Seung-Whee Rhee Department of Environmental Engineering, Kyonggi University, Suwon, Republic of Korea Abstract: Owing to the Minamata Convention on Mercury and the Global Mercury Partnership, policies and regulations on mercury management in advanced countries were intensified by a mercury phaseout program in the mercury control strategy. In developing countries, the legislative or regulatory frameworks on mercury emissions are not established specifically, but mercury management is designed...

  9. Neutron-Activated Gamma-Emission: Technology Review

    Science.gov (United States)

    2012-01-01

    defined in MCNPX to simulate the -spectra collected by NaI detectors (cell 6) from target (cell 3...numerical simulation. Safety issues are of great interest to users and are calculated in section 6. Ideas to increase target distance and reduce...neutron emission, target scatter, and gamma collection processes were simulated using MCNPX . MCNPX is a legacy code from Los Alamos National

  10. Zero-emission wood chip drier with terpene recovery. Project 2: Condensate treatment and terpene production. Final report; Emissonsfreier Holzspaenetrockner mit Rueckgewinnung von Terpenen. Teilvorhaben 2: Kondensataufbereitung und Terpengewinnung. Schlussbericht

    Energy Technology Data Exchange (ETDEWEB)

    Bormann, H.; Sievers, M.

    2002-07-01

    The wood drying process releases volatile constituents, of which terpene compounds are the most important as they can be used as feedstocks for the chemical industry (odorants and aromatic substances). Closed-cycle steam drying of wood chips (pinewood) with vapour condensation and integrated production of terpenes was investigated on a pilot scale and semi-industrial scale. The project was successful. An economic assessment of the pilot experiments showed that integrated terpene production may be economically interesting, especially if the condensates are used as process fluids and the process heat is recycled at least partly. (orig.) [German] Bei der Trocknung von Holz werden fluechtige orginaere Holzinhaltsstoffe freigesetzt. Besondere Bedeutung kommt den Terpenverbindungen zu, da diese als Rohstoffe in der chemischen Industrie (Duft- und Aromastoffherstellung) eingesetzt werden. Mit der Dampftrocknung im geschlossenen Gaskreislauf bietet sich erstmals die Moeglichkeit einer wirtschaftlichen produktionsintegrierten Gewinnung von Terpenverbindungen ueber eine Kondensation der angereicherten Brueden. Im Rahmen eines Verbundvorhabens wurde deshalb a) die technische Umsetzung eines Spaenetrockners (hier: Kiefernholz) wissenschaftlich und messtechnisch begleitet (Teilvorhaben 1, Bearbeitung: Wilhelm-Klauditz-Institut (FhG), Braunschweig) und b) die integrierte Gewinnung von Terpenen im Pilot- und halbtechnischen Massstab untersucht (Teilvorhaben 2, CUTEC-Institut). Mit Hilfe einer zweistufigen Abluftbehandlung aus Absorption und Kondensation im halbtechnischen Massstab konnte eine Vorfraktionierung der Holzinhaltsstoffe dahingehend erreicht werden, dass sich Staub, Harze und Wachse im Waschwasser anreichern, waehrend die fuer die Duftstoffindustrie interessanten Holzoele (Terpene) mit dem Kondensat abgeschieden werden. Die Abtrennung der Holzoele aus dem Kondensat wurde mit einem Leichtstoffabscheider realisiert. Bei Kondensatmengen von 200 bis 500 L/h wurden

  11. Short radius horizontal wells - a new technology to improve recovery from old reservoirs. Horizontalbohrungen mit kleinem Radius - neue Technologie zur intensiven Ausbeutung alter Felder

    Energy Technology Data Exchange (ETDEWEB)

    Ehlers, R.; Picksak, A.; Krueger, V.; Witte, J. (Eastman Teleco, Celle (Germany))

    1992-10-01

    Horizontal technology proved to be a very effective method to improve recovery from old reservoirs besides other methods of enhanced oil recovery. Since the introduction of steerable short radius drilling systems in 1989, the industry holds now the ability to drill horizontal intervals exeeding 300 m below a 12 m radius curve. The system's main components are an articulated downhole motor and a flexible wireline steering tool. The achieved results confirmed the new system's efficiency. Flexible MWDs are currently under extensive field testing and will provide the necessary member for a modern steerable drilling system. Following an introduction to the drilling system, recent case histories from Italy and the Middle East are presented. A future outlook and further applications are given. (orig.).

  12. S 400 BlueHYBRID. First hybrid vehicle with Li-ion technology; S 400 BlueHYBRID. Erstes Hybridfahrzeug mit Li-Ionen-Technologie

    Energy Technology Data Exchange (ETDEWEB)

    Vollrath, Oliver; Armstrong, Neil; Schenk, Juergen; Bitsche, Otmar; Lamm, Arnold [Daimler AG, Stuttgart (Germany)

    2009-07-01

    Mercedes Benz advances the electrification of the drive strand in all performance classes and in all models from the start-stop system till to the full hybrid. Thereby, the S 400 BlueHYBRID presents the first Mercedes-Benz hybrid. Equipped with the characteristics of a start-stop system, with a recovery of the brake energy and with an electrical support of the drive, this hybrid obtains a saving of the consumption of approximately 20 %. By means of the design of the components and by means of the selection of a standard installation size, all hybrid-specific construction units in the vehicle porch could be arranged. Here, a special role comes to the used battery technology, since it became possible to arrange the hybrid battery in the size and the building area of a conventional starter battery accordingly.

  13. Reduction of vaporous emissions during transport of petrol and mineral oil products by river tank ships (20. BImSchV); Verminderung gasfoermiger Emissionen beim Transport von Ottokraftstoffen und Mineraloelprodukten mit Binnenschiffen (20. BImSchV)

    Energy Technology Data Exchange (ETDEWEB)

    Schaefer, K.; Hoffmann, H.; Emeis, S.; Jahn, C.; Sedlmaier, A.; Wilhelm, H.; Dormuth, I.

    2001-11-01

    The gas-free ventilation of the tanks of river tank ships by the common praxis to ventilate the tank atmosphere into ambient air is a big emission source of VOCs and a strong deterioration of air quality. It was shown during several measurement campaigns that the ventilation of the tank atmosphere of river tank ships via the loading / unloading pipes into the land-site vapour recovery unit is a technical solution. The measured emission source strengths during this type of ventilation are of the same amount as the measured emission source strengths during loading and unloading of petrol and are caused by attachment and detachment of loading / unloading pipes only. Furthermore, the concentrations of petrol in the tank atmosphere were measured by the PTB during these experiments. As result of the investigations a leaflet as instruction of environment friendly ventilation of tank atmosphere of river tank ships for the inland sailors and operators of tank storage plants was composed. On the basis of an inquiry of the available vapour recovery units the required capacity of land-site vapour recovery units for the replacement of all ventilation of tank atmosphere to open air was estimated. The capacity of the available vapour recovery units is too low for a preferably short time period of tank atmosphere ventilation. Solving this problem not only the enhancement of the capacity of the available vapour recovery units up to a capacity of 2,200 m{sup 3}/h must be considered but their availability at loading / unloading points of petrol as well as the availability of berthing place must be taken into account also. The necessary enhancement of the capacity and the number of possible new installations of vapour recovery units cannot be defined now because a new amendment for the execution of the 20. BImSchV came into force on 25 August 2001 which allows the ventilation of tank atmosphere of river tank ships to open air under certain conditions until 31 December 2005. To draw

  14. Step change approaches in coal technology and fugitive emissions research

    Institute of Scientific and Technical Information of China (English)

    Aminossadati S.M.; Amanzadeh M.; Prochon E.; Kok J.; Adam S.

    2014-01-01

    Multi-factor productivity (MFP) in underground coal mining has been on the decline for the last decade. The mining industry requires a viable and sustainable approach to overcome the current downtrend. This is only possible by concurrently focussing on productivity improvement and operating costs reduction, delivered through both incremental and step change technology development. Four technologies are pre-sented in this paper:fibre optic borehole sensing has been demonstrated to reveal detailed information about gas flow influx, water level and borehole blockage events occurring along the length of a surface-to-inseam lateral. Fibre optic gas sensing has also been investigated, and this technology promises a remote, intrinsically safe, distributed solution. Recent developments in continuous water jet drilling tech-nology have demonstrated a step change increase in drilling rates and flexibility for coal seam degassing, applicable in both surface-to-inseam and underground in-seam applications. The application of water jet technology to the cable bolt drilling problem offers potential to address a serious health and safety and productivity issue in the roadway development process.

  15. Unregulated greenhouse gas and ammonia emissions from current technology heavy-duty vehicles.

    Science.gov (United States)

    Thiruvengadam, Arvind; Besch, Marc; Carder, Daniel; Oshinuga, Adewale; Pasek, Randall; Hogo, Henry; Gautam, Mridul

    2016-11-01

    The study presents the measurement of carbonyl, BTEX (benzene, toluene, ethyl benzene, and xylene), ammonia, elemental/organic carbon (EC/OC), and greenhouse gas emissions from modern heavy-duty diesel and natural gas vehicles. Vehicles from different vocations that included goods movement, refuse trucks, and transit buses were tested on driving cycles representative of their duty cycle. The natural gas vehicle technologies included the stoichiometric engine platform equipped with a three-way catalyst and a diesel-like dual-fuel high-pressure direct-injection technology equipped with a diesel particulate filter (DPF) and a selective catalytic reduction (SCR). The diesel vehicles were equipped with a DPF and SCR. Results of the study show that the BTEX emissions were below detection limits for both diesel and natural gas vehicles, while carbonyl emissions were observed during cold start and low-temperature operations of the natural gas vehicles. Ammonia emissions of about 1 g/mile were observed from the stoichiometric natural gas vehicles equipped with TWC over all the driving cycles. The tailpipe GWP of the stoichiometric natural gas goods movement application was 7% lower than DPF and SCR equipped diesel. In the case of a refuse truck application the stoichiometric natural gas engine exhibited 22% lower GWP than a diesel vehicle. Tailpipe methane emissions contribute to less than 6% of the total GHG emissions. Modern heavy-duty diesel and natural gas engines are equipped with multiple after-treatment systems and complex control strategies aimed at meeting both the performance standards for the end user and meeting stringent U.S. Environmental Protection Agency (EPA) emissions regulation. Compared to older technology diesel and natural gas engines, modern engines and after-treatment technology have reduced unregulated emissions to levels close to detection limits. However, brief periods of inefficiencies related to low exhaust thermal energy have been shown to

  16. Life cycle Greenhouse gas emissions of current Oil Sands Technologies: surface mining and in situ applications.

    Science.gov (United States)

    Bergerson, Joule A; Kofoworola, Oyeshola; Charpentier, Alex D; Sleep, Sylvia; Maclean, Heather L

    2012-07-17

    Life cycle greenhouse gas (GHG) emissions associated with two major recovery and extraction processes currently utilized in Alberta's oil sands, surface mining and in situ, are quantified. Process modules are developed and integrated into a life cycle model-GHOST (GreenHouse gas emissions of current Oil Sands Technologies) developed in prior work. Recovery and extraction of bitumen through surface mining and in situ processes result in 3-9 and 9-16 g CO(2)eq/MJ bitumen, respectively; upgrading emissions are an additional 6-17 g CO(2)eq/MJ synthetic crude oil (SCO) (all results are on a HHV basis). Although a high degree of variability exists in well-to-wheel emissions due to differences in technologies employed, operating conditions, and product characteristics, the surface mining dilbit and the in situ SCO pathways have the lowest and highest emissions, 88 and 120 g CO(2)eq/MJ reformulated gasoline. Through the use of improved data obtained from operating oil sands projects, we present ranges of emissions that overlap with emissions in literature for conventional crude oil. An increased focus is recommended in policy discussions on understanding interproject variability of emissions of both oil sands and conventional crudes, as this has not been adequately represented in previous studies.

  17. Dioxin emission of road traffic; Dioxin-Emission des Strassenverkehrs

    Energy Technology Data Exchange (ETDEWEB)

    Buehler, U. [Antriebstechnik Ferretti GmbH (Germany); Essers, U. [Stuttgart Univ. (Germany). Inst. fuer Verbrennungsmotoren und Kraftfahrwesen]|[Forschungsinstut fuer Kraftfahrwesen und Fahrzeugmotoren, Stuttgart (Germany).; Greiner, R. [Stuttgart Univ. (Germany). Inst. fuer Verbrennungsmotoren und Kraftfahrwesen

    1997-07-01

    The well-founded determination of the dioxin and furan emission (PXDD/PXDF) of road traffic was the aim of a research project jointly conducted by the Chair of Ecological Chemistry and Geochemistry at the University of Bayreuth (Prof. Hutzinger), the Institute for Organic Chemistry at the University of Tuebingen (Prof. Hagenmaier) and the IVK (Prof. Essers). The non-standardised examinations of an otto engine, a passenger car and a truck diesel engine required the development of sample-taking and analysis methods as well as of engine test technology. The otto engine driven with leaded gasoline containing scavengers showed the highest dioxin and furan emission while, on the other hand, the otto engine driven with unleaded gasoline, the diesel engines and in particular the otto engine with three-way catalytic converter showed much lower values. (orig.) [Deutsch] Die fundierte Ermittlung der Dioxin- und Furan-Emissionen (PXDD/PXDF) des Strassenverkehrs war das Ziel eines vom Lehrstuhl fuer Oekologische Chemie und Geochemie der Universitaet Bayreuth, dem Institut fuer Organische Chemie der Universitaet Tuebingen und dem IVK der Universitaet Stuttgart gemeinsam bearbeiteten Forschungsprojekts. Die nicht standardisierten Untersuchungen an einem Ottomotor, einem Pkw- und einem Lkw-Dieselmotor erforderten die Entwicklung von Probenahme- und Analyseverfahren sowie der motorischen Prueftechnik. Der mit verbleitem, scavengerhaltigem Benzin betriebene Ottomotor wies die hoechsten Dioxin- und Furanemissionen auf. Demgegenueber waren die Emissionen des mit unverbleitem Benzin betriebenen Ottomotors, der Dieselmotoren und besonders des Ottomotors mit Drei-Wege-Katalysator deutlich geringer. (orig.)

  18. Environmentally Benign Technology for Efficient Warm-White Light Emission

    Science.gov (United States)

    Shen, Pin-Chun; Lin, Ming-Shiun; Lin, Ching-Fuh

    2014-06-01

    Nowadays efficient down conversion for white light emission is mainly based on rare-earth doped phosphors or cadmium-containing quantum dots. Although they exhibit high luminescence efficiency, the rare-earth mining and cadmium pollution have so far led to extremely high environmental cost, which conflicts the original purpose of pursuing efficient lighting. Here, we explore a new strategy to achieve efficient luminescence conversion based on polymer-decorated nanoparticles. The ZnO and Mn2+ doped ZnS nanoparticles are encapsulated by poly(9,9-di-n- hexylfluorenyl-2,7-diyl). The resultant core-shell nanocomposites then encompass three UV-to-visible luminescence conversion routes for photon emissions at blue, green, and orange colors, respectively. As a result, the color temperature is widely tunable (2100 K ~ 6000 K), so candle light or pure white light can be generated. The quantum yield up to 91% could also be achieved. Such rare-earth-element free nanocomposites give the bright perspectives for energy-saving, healthy, and environmentally benign lighting.

  19. MTU series 1600 HCCI engine with extremely low exhaust emissions over the entire engine map; HCCI-Motor der MTU Baureihe 1600 mit extrem niedrigen Abgasemissionen im gesamten Motorkennfeld

    Energy Technology Data Exchange (ETDEWEB)

    Teetz, Christoph; Bergmann, Dirk; Sauer, Christina; Schneemann, Arne [MTU, Friedrichshafen (Germany); Eichmeier, Johannes; Spicher, Ulrich [Karlsruhe Institute of Technology (KIT), Karlsruhe (Germany). IFKM

    2012-11-01

    The main challenge when developing off-highway engines is to keep emissions within the limits to apply in the future while maintaining low fuel consumption and low CO{sub 2} output. In the USA in particular, diesel engines in the 130 - 560 kW power range are to be subject from 2014 to EPA Tier 4 legislation, which imposes limits of 0.4 g/kWh for NO{sub x} and 0.02 g/kWh for particulate matter. Diesel units can only satisfy those requirements using a combination of in-engine measures and exhaust aftertreatment systems (SCR, particulate filters), which makes them a good deal more complex and expensive. In the face of CO{sub 2} emissions regulations and the growing demand for diesel fuel, greater emphasis is now being placed on alternative fuels. Homogeneous Charge Compression Ignition or 'HCCI' provides an alternative to complex exhaust aftertreatment systems which generates virtually no soot or nitrous oxide emissions. It does, however, present new challenges with respect to combustion control and engine load. Up to the present, it has not been possible to exploit the full potential of this combustion process over the entire engine map, since the high ignition performance of diesel fuel at high loads results in excessively early combustion and inadmissible pressure gradients. The pre-development department of MTU Friedrichshafen worked with the Institute of Internal Combustion Engines at the Karlsruhe Institute of Technology (KIT) to devise a research prototype for an industrial application which would allow semi-homogenous combustion with controlled self-ignition over the full engine map. The engine is based on a 6-cylinder version of the MTU Series 1600 unit and has a rated output of 300 kW. The fuels - gasoline or ethanol and diesel - are mixed in such a way as to avoid the disadvantages associated with most HCCI processes. Since the use of ethanol also enhances combustion efficiency, it has a two-fold positive effect on the CO{sub 2} situation. With

  20. TECHNOLOGIES TO REDUCE EMISSIONS OF NOXIOUS GASES RESULTING FROM LIVESTOCK FARMING

    Directory of Open Access Journals (Sweden)

    Anna Smurzyńska

    2016-05-01

    Full Text Available During the animal production, which is increasingly expanding, it comes to harmful gas emissions. These emissions relate to both greenhouse and odorous gases emissions. The resulting volatile compounds also contribute to the formation of acid rain, eutrophication of water aquens and soils, corrosion in livestock buildings and damage of the ozone layer. Considering the existing problem, solutions neutralizing the impact of animal production on the environment, are being looked for. Moreover, numerous activities in the way of nutritional and technological solutions are undertaken. Nutritional techniques are based on diet modification and require continuous monitoring of livestock animals. On the other hand, technological solutions are taking action to reduce emissions of gases from livestock buildings and slurry management. The proposed ways of disposing slurry result in different effects in terms of reduction of dangerous gases. They require the implementation of additional actions leading, among other things, to the proper animal waste disposal.

  1. Zero emissions trucks. An overview of state-of-the-art technologies and their potential

    Energy Technology Data Exchange (ETDEWEB)

    Den Boer, E.; Aarnink, S. [CE Delft, Delft (Netherlands); Kleiner, F.; Pagenkopf, J. [German Aerospace Center DLR, Cologne (Germany)

    2013-07-15

    The study by CE Delft and the German Aerospace Center (DLR), commissioned by the International Council on Clean Transportation (ICCT), surveys the technology potential for zero-emission road freight transport in the EU. For short distance transport, battery electric technology is feasible, as distribution trucks have lower range requirements and recharging can occur at scheduled downtimes (e.g. overnight). For long haul applications, battery electric vehicles coupled with overhead wires (catenary) or in-road charging (dynamic) infrastructure are possible, as well as fuel cell drivelines. The cost differential between conventional and zero emission HDVs will diminish over the next 10-15 years, as fuel savings offset other costs. If zero-emission technologies are introduced on a large scale in the onroad freight transport sector beginning in 2020, the total end-user costs will not significantly increase. The total cost of ownership within this study do not consider required infrastructure investments. All zero emission technologies require major infrastructure investments, whether hydrogen refuelling stations, in-road inductive charging, or other systems. Broad policy support is needed to encourage the development and evaluation of various technology options. Over time, the policy focus must shift from stimulating innovation and technology adoption to regulation, if it is to spur a successful transformation of the truck market.

  2. Global emission projections for the transportation sector using dynamic technology modeling

    Science.gov (United States)

    Yan, F.; Winijkul, E.; Streets, D. G.; Lu, Z.; Bond, T. C.; Zhang, Y.

    2014-06-01

    In this study, global emissions of gases and particles from the transportation sector are projected from the year 2010 to 2050. The Speciated Pollutant Emission Wizard (SPEW)-Trend model, a dynamic model that links the emitter population to its emission characteristics, is used to project emissions from on-road vehicles and non-road engines. Unlike previous models of global emission estimates, SPEW-Trend incorporates considerable detail on the technology stock and builds explicit relationships between socioeconomic drivers and technological changes, such that the vehicle fleet and the vehicle technology shares change dynamically in response to economic development. Emissions from shipping, aviation, and rail are estimated based on other studies so that the final results encompass the entire transportation sector. The emission projections are driven by four commonly-used IPCC (Intergovernmental Panel on Climate Change) scenarios (A1B, A2, B1, and B2). With global fossil-fuel use (oil and coal) in the transportation sector in the range of 128-171 EJ across the four scenarios, global emissions are projected to be 101-138 Tg of carbon monoxide (CO), 44-54 Tg of nitrogen oxides (NOx), 14-18 Tg of non-methane total hydrocarbons (THC), and 3.6-4.4 Tg of particulate matter (PM) in the year 2030. At the global level, a common feature of the emission scenarios is a projected decline in emissions during the first one or two decades (2010-2030), because the effects of stringent emission standards offset the growth in fuel use. Emissions increase slightly in some scenarios after 2030, because of the fast growth of on-road vehicles with lax or no emission standards in Africa and increasing emissions from non-road gasoline engines and shipping. On-road vehicles and non-road engines contribute the most to global CO and THC emissions, while on-road vehicles and shipping contribute the most to NOx and PM emissions. At the regional level, Latin America and East Asia are the two

  3. Global emission projections for the transportation sector using dynamic technology modeling

    Directory of Open Access Journals (Sweden)

    F. Yan

    2013-09-01

    Full Text Available In this study, global emissions of gases and particles from the transportation sector are projected from the year 2010 to 2050. The Speciated Pollutant Emission Wizard (SPEW-Trend model, a dynamic model that links the emitter population to its emission characteristics, is used to project emissions from on-road vehicles and non-road engines. Unlike previous models of global emission estimates, SPEW-Trend incorporates considerable details on the technology stock and builds explicit relationships between socioeconomic drivers and technological changes, such that the vehicle fleet and the vehicle technology shares change dynamically in response to economic development. Emissions from shipping, aviation, and rail are estimated based on other studies so that the final results encompass the entire transportation sector. The emission projections are driven by four commonly-used IPCC scenarios (A1B, A2, B1, and B2. We project that global fossil-fuel use (oil and coal in the transportation sector will be in the range of 3.0–4.0 Gt across the four scenarios in the year 2030. Corresponding global emissions are projected to be 101–138 Tg of carbon monoxide (CO, 44–54 Tg of nitrogen oxides (NOx, 14–18 Tg of total hydrocarbons (THC, and 3.6–4.4 Tg of particulate matter (PM. At the global level, a common feature of the emission scenarios is a projected decline in emissions during the first one or two decades (2010–2030, because the effects of stringent emission standards offset the growth in fuel use. Emissions increase slightly in some scenarios after 2030, because of the fast growth of on-road vehicles with lax or no emission standards in Africa and increasing emissions from non-road gasoline engines and shipping. On-road vehicles and non-road engines contribute the most to global CO and THC emissions, while on-road vehicles and shipping contribute the most to NOx and PM emissions. At the regional level, Latin America and East Asia are the two

  4. Technology Roadmap: High-Efficiency, Low-Emissions Coal-Fired Power Generation

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2012-07-01

    Coal is the largest source of power globally and, given its wide availability and relatively low cost, it is likely to remain so for the foreseeable future. The High-Efficiency, Low-Emissions Coal-Fired Power Generation Roadmap describes the steps necessary to adopt and further develop technologies to improve the efficiency of the global fleet of coal. To generate the same amount of electricity, a more efficient coal-fired unit will burn less fuel, emit less carbon, release less local air pollutants, consume less water and have a smaller footprint. High-efficiency, low emissions (HELE) technologies in operation already reach a thermal efficiency of 45%, and technologies in development promise even higher values. This compares with a global average efficiency for today’s fleet of coal-fired plants of 33%, where three-quarters of operating units use less efficient technologies and more than half is over 25 years old. A successful outcome to ongoing RD&D could see units with efficiencies approaching 50% or even higher demonstrated within the next decade. Generation from older, less efficient technology must gradually be phased out. Technologies exist to make coal-fired power generation much more effective and cleaner burning. Of course, while increased efficiency has a major role to play in reducing emissions, particularly over the next 10 years, carbon capture and storage (CCS) will be essential in the longer term to make the deep cuts in carbon emissions required for a low-carbon future. Combined with CCS, HELE technologies can cut CO2 emissions from coal-fired power generation plants by as much as 90%, to less than 100 grams per kilowatt-hour. HELE technologies will be an influential factor in the deployment of CCS. For the same power output, a higher efficiency coal plant will require less CO2 to be captured; this means a smaller, less costly capture plant; lower operating costs; and less CO2 to be transported and stored.

  5. Use of modern and clean coal technologies for reduction of greenhouse gas emissions

    Energy Technology Data Exchange (ETDEWEB)

    Popescu, A.; Lavrov, G.; Costea, D. [Institutul de Stuidii Si Proiectari Energetice S.A. (ISPE), Bucharest (Hungary)

    2002-07-01

    Cleaner coal technologies are available now to reduce emissions. After an introductory paragraph, the paper presents a summary of the 'green taxes' on CO{sub 2} emissions and energy use in Europe and the OECD. It then explores the influence of CO{sub 2} taxes on the expansion plan of capacities for power generation in Romania. 1 ref., 1 tab.

  6. Technology Demonstration of the Zero Emissions Chromium Electroplating System

    Science.gov (United States)

    2008-02-01

    blanket technology for electroplating tanks. When no liquid blanket is used, evaporation of water, especially during warm weather conditions, requires...0.007 0.004 0.002 Tank 12A had noticeable blobs floating on the surface and also at the interfacial layer of PRD fluid and the chromium acid solution...Tank 12B did not have any such blobs . All the parts removed after plating looked fairly good. There were no visible streaks, water breaks, etc. The

  7. Technology Reinvestment Program/Advanced ``Zero Emission'' Control Valve (Phase II)

    Energy Technology Data Exchange (ETDEWEB)

    J. Napoleon

    1998-12-01

    The objectives of this effort are to determine, develop and demonstrate the feasibility of significantly reducing the cost and expanding the applications for a family of Advanced Zero Emissions Control Valves that meets the fugitive emissions requirements of the 1990 Amendments to the Clean Air Act. This program is a direct technology spin-off from the valve technology that is critical to the US Navy's Nuclear Powered Fleet. These zero emissions valves will allow the Hydrocarbon and Chemical Processing Industries, etc., to maintain their competitiveness and still meet environmental and safety requirements. Phase 2 is directed at refining the basic technologies developed during Phase 1 so that they can be more readily selected and utilized by the target market. In addition to various necessary certifications, the project will develop a full featured digital controller with ``smart valve'' growth capability, expanding valve sizes/applications and identifying valve materials to permit applications in severe operational environments.

  8. Technology and Greenhouse Gas Emissions: An IntegratedScenario Analysis

    Energy Technology Data Exchange (ETDEWEB)

    Koomey, J.G.; Latiner, S.; Markel, R.J.; Marnay, C.; Richey, R.C.

    1998-09-01

    This report describes an analysis of possible technology-based scenarios for the U.S. energy system that would result in both carbon savings and net economic benefits. We use a modified version of the Energy Information Administration's National Energy Modeling System (LBNL-NEMS) to assess the potential energy, carbon, and bill savings from a portfolio of carbon saving options. This analysis is based on technology resource potentials estimated in previous bottom-up studies, but it uses the integrated LBNL-NEMS framework to assess interactions and synergies among these options. The analysis in this paper builds on previous estimates of possible "technology paths" to investigate four major components of an aggressive greenhouse gas reduction strategy: (1) the large scale implementation of demand-side efficiency, comparable in scale to that presented in two recent policy studies on this topic; (2) a variety of "alternative" electricity supply-side options, including biomass cofiring, extension of the renewable production tax credit for wind, increased industrial cogeneration, and hydropower refurbishment. (3) the economic retirement of older and less efficient existing fossil-find power plants; and (4) a permit charge of $23 per metric ton of carbon (1996 $/t),l assuming that carbon trading is implemented in the US, and that the carbon permit charge equilibrates at this level. This level of carbon permit charge, as discussed later in the report, is in the likely range for the Clinton Administration's position on this topic.

  9. Mit der Technik auf du

    OpenAIRE

    Gleitsmann, Rolf-Jürgen; Kunze, Rolf-Ulrich

    2017-01-01

    Im Vordergrund auch dieses dritten Bandes mit Technikessays steht die Bildinterpretation und die Erschließung von Bildquellen für die kontextualisierende, sozialkonstruktivistische Kulturgeschichte der Technik, die bislang noch wenig oder gar nicht Gegenstand historischer Betrachtung waren: u. a. der Graphiken von Carl G. Evers aus den 1950er Jahren, amerikanischer und deutscher Modellbahnzeitschriften, von Industriewerbung und einem Verkehrsbilderbuch. Zeitlich liegt der Schwerpunkt auf der ...

  10. Mit Rechten am rechten Ort?

    OpenAIRE

    Bräuß, Katharina

    2010-01-01

    Kann pädagogisch sinnvoll mit rechtsextremen Jugendlichen in einer Gedenkstätte für die Opfer des Nationalsozialismus gearbeitet werden? Diese Frage steht im Zentrum der vorliegenden Arbeit, die sich im interdisziplinären Feld von Erinnerungs- und Gedenkstättenpädagogik, Rechtsextremismusforschung und pädagogischer Intervention/Prävention gegenüber Rassismus und Rechtsextremismus bewegt.

  11. MIT Lincoln Laboratory Facts 2015

    Science.gov (United States)

    2015-01-01

    either middle- or high- school students. These programs are aimed at encouraging students, particularly in underserved populations , to pursue...useful information to fellow employees who are experiencing the significant impact Alzheimer’s disease has on indi- viduals and families . They also...support educational programs and Community Giving at MIT $7420 Raised for the Multiple Sclerosis Society in the Bike & Hike the Berkshires

  12. Optimizing Technology to Reduce Mercury and Acid Gas Emissions from Electric Power Plants

    Energy Technology Data Exchange (ETDEWEB)

    Jeffrey C. Quick; David E. Tabet; Sharon Wakefield; Roger L. Bon

    2004-07-31

    County-average hydrogen values are calculated for the part 2, 1999 Information Collection Request (ICR) coal-quality data, published by the U.S. Environmental Protection Agency. These data are used together with estimated, county-average moisture values to calculate average net heating values for coal produced in U.S. counties. Finally, 10 draft maps of the contiguous U.S. showing the potential uncontrolled sulfur, chlorine and mercury emissions of coal by U.S. county-of-origin, as well as expected mercury emissions calculated for existing emission control technologies, are presented and discussed.

  13. Development potential of the DEUTZ 2013 engine with Common Rail injection system; Weiterentwicklungspotential der DEUTZ Baureihe 2013 mit Common Rail Einspritzsystem

    Energy Technology Data Exchange (ETDEWEB)

    Pfeifer, A.; Knuth, H.W.; Miebach, R.; Feuser, W. [DEUTZ AG, Koeln (Germany)

    2000-07-01

    On the last year's Wiener Motorensymposium a description of the new DEUTZ 2013 engine was given. The basic engine concept was designed to include enough potential for further development steps that will be necessary to cope with future emission demands. For this reason the 2013 engine was chosen as base engine in a research program funded by the German Ministry of Education and Science (BMBF) aiming at the fulfilment of the EURO 4 standards with internal combustion means only. This article covers the applied technical measures as well as the achieved results (emission level, noise reduction potential). Elementary technology is the Common Rail fuel injection system, which plays its optimum role in combination with variable geometry turbocharging and exhaust gas recirculation. (orig.) [German] Anlaesslich des letzten Wiener Motorensymposiums wurde die neue DEUTZ Nutzfahrzeug-Motorbaureihe 2013 vorgestellt. Das Grundkonzept des Motors bietet Potential fuer Weiterentwicklungen zur Darstellung zukuenftiger Emissionsanforderungen. Fuer ein vom Bundesministerium fuer Bildung, Wissenschaft und Forschung (BMBF) an die DEUTZ AG vergebenes Forschungsvorhaben mit dem Ziel der innermotorischen Darstellung der EURO 4 Abgasgesetzgebung wurde aus diesem Grund der Motor 2013 als Basis herangezogen. In diesem Beitrag werden die eingesetzten Techniken beschrieben und das damit erzielte Emissionsminderungs- und Akustikpotential dargestellt. Kerntechnologie ist das Nutzfahrzeug-Common-Rail-Einspritzsystem, das sein volles Potential zur Emissionsreduktion in Verbindung mit Turboladern mit variabler Turbinengeometrie und Abgasrueckfuehrung zeigt. (orig.)

  14. Comparative Analysis of Passenger Traffic Fleets in Asian Cities: Technology, Driving Activities, and Emission

    Science.gov (United States)

    KIM Oanh, N. T.; Huynh, H. V.; Saikawa, E.

    2015-12-01

    The road transport sector is the major emission source of toxic air pollutants and greenhouse gases (GHGs) in large Asian cities. This paper comparatively analyzed on-road passenger traffic fleets (cars, buses, taxis, motorcycles), using local data collected in cities of Bangkok (BKK), Kathmandu, Hanoi, Ho Chi Minh City (HCMC), and Yangon. Surveys were done in 2010-2014 to obtain information on vehicle technology, driving activities (speed, distance, number, and types of starts), traffic density, and fuel characteristics. Large shares of pre-Euro vehicles were still observed, especially for public buses. The most advanced technology was Euro4, which was observed in small shares (car fleets in BKK, HCMC, and Yangon. Euro3 was generally the most advanced technology found in other fleets in these cities. Motorcycles (MC) was the most dominant fleet in all cities, except in Yangon, where they were not allowed. Low vehicle speeds, mainly below 25 km/h, were observed for all vehicle types, indicating traffic jams. Natural gas and LPG had considerable shares in BKK and Yangon while for other cities diesel and gasoline were still the two major fuels used in transportation. Running emission factors (EF) of buses and taxis in Kathmandu were considerably higher than other cities due to its hilly topography, low speeds, high mileage, and less advanced vehicle technologies. The number of passenger vehicles per 1000 people were 400-500 in HCMC and Hanoi (mainly by MC) and in BKK (also by cars), moderate in Kathmandu (200) and the lowest in Yangon (40) because of the MC ban. Annual emissions of the passenger fleets were calculated for each city using the International Vehicle Emission (IVE) for 14 species. BC and OC emissions were estimated using their fractions of PM10 emission. Annual emission per capita of toxic air pollutants and GHGs was analyzed. For example, the emission in kg/year/person for CO, VOC, NOx and PM10 in these cities was 24-150 for CO, 0.9-23 for VOC, 2

  15. Valuation of clean energy investments: The case of the Zero Emission Coal (ZEC) technology

    Science.gov (United States)

    Yeboah, Frank Ernest

    Today, coal-fired power plants produce about 55% of the electrical energy output in the U.S. Demand for electricity is expected to grow in future. Coal can and will continue to play a substantial role in the future global energy supply, despite its high emission of greenhouse gases (e.g. CO2 etc.) and low thermal energy conversion efficiency of about 37%. This is due to the fact that, it is inexpensive and global reserves are abundant. Furthermore, cost competitive and environmentally acceptable energy alternatives are lacking. New technologies could also make coal-fired plants more efficient and environmentally benign. One such technology is the Zero Emission Carbon (ZEC) power plant, which is currently being proposed by the ZECA Corporation. How much will such a technology cost? How competitive will it be in the electric energy market when used as a technology for mitigating CO2 emission? If there were regulatory mechanisms, such as carbon tax to regulate CO2 emission, what would be the minimum carbon tax that should be imposed? How will changes in energy policy affect the implementation of the ZEC technology? How will the cost of the ZEC technology be affected, if a switch from coal (high emission-intensive fuel) to natural gas (low emission-intensive fuel) were to be made? This work introduces a model that can be used to analyze and assess the economic value of a ZEC investment using valuation techniques employed in the electric energy industry such as revenue requirement (e.g. cost-of-service). The study concludes that the cost of service for ZEC technology will be about 95/MWh at the current baseline scenario of using fuel cell as the power generation system and coal as the primary fuel, and hence will not be competitive in the energy markets. For the technology to be competitive, fuel cell capital cost should be as low as 500/kW with a lifetime of 20 years or more, the cost of capital should be around 10%, and a carbon tax of 30/t of CO2 should be in place

  16. Evaluation of the MIT RMID 1000 system for the identification of Listeria species.

    Science.gov (United States)

    Ricardi, John; Haavig, David; Cruz, Lasaunta; Paoli, George; Gehring, Andrew

    2010-01-01

    The Micro Imaging Technology (MIT) 1000 Rapid Microbial Identification (RMID) System is a device that uses the principles of light scattering coupled with proprietary algorithms to identify bacteria after being cultured and placed in a vial of filtered water. This specific method is for pure culture identification of Listeria spp. A total of 81 microorganisms (55 isolates) were tested by the MIT 1000 System, of which 25 were Listeria spp. and 30 a variety of other bacterial species. In addition, a total of 406 tests over seven different ruggedness parameters were tested by the MIT 1000 System to determine its flexibility to the specifications stated in the MIT 1000 System User Guide in areas where they might be deviated by a user to shorten the test cycle. Overall, MIT concluded that the MIT 1000 System had an accuracy performance that should certify this Performance Test Method for the identification of Listeria spp. This report discusses the tests performed, results achieved, and conclusions, along with several reference documents to enable a higher understanding of the technology used by the MIT 1000 System.

  17. Biofuels vs. emission problems; Biosprit ringt mit Emission

    Energy Technology Data Exchange (ETDEWEB)

    Wiedemann, Karsten

    2011-11-15

    Discussions concerning the climate balance of biofuels have been going on for several years. Now, studies made on behalf of the EU show problematic aspects, especially for biodiesel. The findings are now discussed controversially in Brussels.

  18. Emissions from international shipping: 2. Impact of future technologies on scenarios until 2050

    Science.gov (United States)

    Eyring, V.; KöHler, H. W.; Lauer, A.; Lemper, B.

    2005-09-01

    In this study the today's fleet-average emission factors of the most important ship exhausts are used to calculate emission scenarios for the future. To develop plausible future technology scenarios, first upcoming regulations and compliance with future regulations through technological improvements are discussed. We present geographically resolved emission inventory scenarios until 2050, based on a mid-term prognosis for 2020 and a long-term prognosis for 2050. The scenarios are based on some very strict assumptions on future ship traffic demands and technological improvements. The four future ship traffic demand scenarios are mainly determined by the economic growth, which follows the IPCC SRES storylines. The resulting fuel consumption is projected through extrapolations of historical trends in economic growth, total seaborne trade and number of ships, as well as the average installed power per ship. For the future technology scenarios we assume a diesel-only fleet in 2020 resulting in fuel consumption between 382 and 409 million metric tons (Mt). For 2050 one technology scenario assumes that 25% of the fuel consumed by a diesel-only fleet can be saved by applying future alternative propulsion plants, resulting in a fuel consumption that varies between 402 and 543 Mt. The other scenario is a business-as-usual scenario for a diesel-only fleet even in 2050 and gives an estimate between 536 and 725 Mt. Dependent on how rapid technology improvements for diesel engines are introduced, possible technology reduction factors are applied to the today's fleet-average emission factors of all important species to estimate future ship emissions. Combining the four traffic demand scenarios with the four technology scenarios, our results suggest emissions between 8.8 and 25.0 Tg (NO2) in 2020, and between 3.1 to 38.8 Tg (NO2) in 2050. The development of forecast scenarios for CO2, NOx, SOx, CO, hydrocarbons, and particulate matter is driven by the requirements for global model

  19. Pulsed Corona Plasma Technology for Treating VOC Emissions from Pulp Mills

    Energy Technology Data Exchange (ETDEWEB)

    Fridman, Alexander A.; Gutsol, Alexander; Kennedy, Lawrence A.; Saveliev, Alexei V.; Korobtsev, Sergey V.; Shiryaevsky, Valery L.; Medvedev, Dmitry

    2004-07-28

    Under the DOE Office of Industrial Technologies Forest Products program various plasma technologies were evaluated under project FWP 49885 ''Experimental Assessment of Low-Temperature Plasma Technologies for Treating Volatile Organic Compound Emissions from Pulp Mills and Wood Products Plants''. The heterogeneous pulsed corona discharge was chosen as the best non-equilibrium plasma technology for control of the vent emissions from HVLC Brownstock Washers. The technology for removal of Volatile Organic Compounds (VOCs) from gas emissions with conditions typical of the exhausts of the paper industry by means of pulsed corona plasma techniques presented in this work. For the compounds of interest in this study (methanol, acetone, dimethyl sulfide and ? -pinene), high removal efficiencies were obtained with power levels competitive with the present technologies for the VOCs removal. Laboratory experiments were made using installation with the average power up to 20 W. Pilot plant prepared for on-site test has average plasma power up to 6.4 kW. The model of the Pilot Plant operation is presented.

  20. Greenhouse gas emissions reductions in Ukraine through energy efficiency policies and technologies implementation

    Energy Technology Data Exchange (ETDEWEB)

    Rapstun, M. [Agency for Rational Energy Use and Ecology, Kiev (Ukraine)

    2005-07-01

    This paper reviewed potential strategies for reducing greenhouse gas (GHG) emissions in the Ukraine as a result of the country's recent ratification of the Kyoto Protocol. The Ukraine has been identified as a key supplier to the carbon market due to the fact that many of its energy technologies need to be modernized. Key sources of greenhouse gas (GHG) emissions in the Ukraine were presented, as well as the emissions reduction potential of existing technologies in various sectors. An ENPEP model was used to examine emissions levels under different development scenarios. A summary of the main environmental and economic parameters of energy efficiency investment projects developed by ARENA-ECO were also presented. Results of the study showed that the Ukraine has the potential to supply more than 650 million tonnes of carbon dioxide (CO{sub 2}) emission reductions over the 2008-2012 Kyoto Protocol commitment period. Priority sectors included the power and heat production sector; the metallurgy industry; the natural gas industry; petroleum and petroleum refining industries; chemical and petrochemical industries; the construction industry; municipal utility services; agriculture; and transport. It was concluded that many of the proposed emissions abatement projects suggested in the paper were also cost-effective. Payback periods ranged from between 1 and 8 years, and investment requirements for the projects ranged between $4 to $20 per tonne of CO{sub 2} equivalent. 8 refs., 1 tab., 2 figs.

  1. Transformative Reduction of Transportation Greenhouse Gas Emissions. Opportunities for Change in Technologies and Systems

    Energy Technology Data Exchange (ETDEWEB)

    Vimmerstedt, Laura [National Renewable Energy Laboratory (NREL), Golden, CO (United States); Brown, Austin [National Renewable Energy Laboratory (NREL), Golden, CO (United States); Newes, Emily [National Renewable Energy Laboratory (NREL), Golden, CO (United States); Markel, Tony [National Renewable Energy Laboratory (NREL), Golden, CO (United States); Schroeder, Alex [National Renewable Energy Laboratory (NREL), Golden, CO (United States); Zhang, Yimin [National Renewable Energy Laboratory (NREL), Golden, CO (United States); Chipman, Peter [U.S. Department of Transportation, Washington, D.C. (United States); Johnson, Shawn [U.S. Department of Transportation, Washington, D.C. (United States)

    2015-04-30

    The transportation sector is changing, influenced by concurrent, ongoing, dynamic trends that could dramatically affect the future energy landscape, including effects on the potential for greenhouse gas emissions reductions. Battery cost reductions and improved performance coupled with a growing number of electric vehicle model offerings are enabling greater battery electric vehicle market penetration, and advances in fuel cell technology and decreases in hydrogen production costs are leading to initial fuel cell vehicle offerings. Radically more efficient vehicles based on both conventional and new drivetrain technologies reduce greenhouse gas emissions per vehicle-mile. Net impacts also depend on the energy sources used for propulsion, and these are changing with increased use of renewable energy and unconventional fossil fuel resources. Connected and automated vehicles are emerging for personal and freight transportation systems and could increase use of low- or non-emitting technologies and systems; however, the net effects of automation on greenhouse gas emissions are uncertain. The longstanding trend of an annual increase in transportation demand has reversed for personal vehicle miles traveled in recent years, demonstrating the possibility of lower-travel future scenarios. Finally, advanced biofuel pathways have continued to develop, highlighting low-carbon and in some cases carbon-negative fuel pathways. We discuss the potential for transformative reductions in petroleum use and greenhouse gas emissions through these emerging transportation-sector technologies and trends and present a Clean Transportation Sector Initiative scenario for such reductions, which are summarized in Table ES-1.

  2. ENVIRONMENTAL TECHNOLOGY VERIFICATION REPORT, FRANCE COMPRESSOR PRODUCTS EMISSIONS PACKING, PHASE I REPORT

    Science.gov (United States)

    The report presents results of a Phase I test of emissions packing technology offered by France Compressor Products which is designed to reduce methane leaks from compressor rod packing when a compressor is in a standby and pressurized state. This Phase I test was executed betwee...

  3. 78 FR 59903 - Emission Mask Requirements for Digital Technologies on 800 MHz NPSPAC Channels; Analog FM...

    Science.gov (United States)

    2013-09-30

    ... COMMISSION 47 CFR Part 90 Emission Mask Requirements for Digital Technologies on 800 MHz NPSPAC Channels; Analog FM Capability on Mutual Aid and Interoperability Channels AGENCY: Federal Communications... Petition for Rulemaking filed by Harris Corporation (Harris). The NPRM proposes to require digital...

  4. The Strategy and Technology Selection for Non-CO2 Greenhouse Gas Emission Control

    Institute of Scientific and Technical Information of China (English)

    ZHOU Ya-Min; FENG Yong-Sheng

    2014-01-01

    The emission control of non-CO2 greenhouse gases is conducive to slowing down global warming. It is also helpful in controlling environmental pollution, and beneficial in improving the local health benefits. This paper aims at six kinds of non-CO2 greenhouse gases under United Nations Framework Convention on Climate Change, namely methane (CH4), nitrous oxide (N2O), hydrofluorocarbons (HFCs), perfluorocarbons (PFCs), sulfur hexafluoride (SF6), and nitrogen trifluoride (NF3). This paper analyzes the emission status and trend of China’s non-CO2 greenhouse gases, and provides some technology selections for non-CO2 emission reduction. Through strategic policy arrangements and appropriate technology choices, China can gain environmental protection and greenhouse gas control.

  5. Diskriminierung von Enantiomeren mit chiralen Selektoren

    OpenAIRE

    Würthner, Stefan

    2007-01-01

    Die vorliegende Dissertation befasst sich mit der systematischen Aufklärung von zwischenmolekularen Wirt-Gast-Wechselwirkungen von Arzneistoffen mit Cyclodextrinen. In einem sich trichterförmig verengenden Erkenntnisprozeß wird im ersten Schritt eine breite Datenbasis von Kapillarelektrophorese-Daten von 86 chiralen Arzneistoffen mit 3 nativen CDs (alpha, beta und gamma) sowie 11 CD-Derivaten gewonnen. Sowohl die Trennfaktoren der Enantiomeren (alpha_m) als auch die Retardierungsfaktoren (R_m...

  6. Research on Forecast Technology of Mine Gas Emission Based on Fuzzy Data Mining(FDM)

    Institute of Scientific and Technical Information of China (English)

    XU Chang-kai; WANG Yao-cai; WANG Jun-wei

    2004-01-01

    The safe production of coalmine can be further improved by forecasting the quantity of gas emission based on the real-time data and historical data which the gas monitoring system has saved. By making use of the advantages of data warehouse and data mining technology for processing large quantity of redundancy data, the method and its application of forecasting mine gas emission quantity based on FDM were studied. The constructing fuzzy resembling relation and clustering analysis were proposed, which the potential relationship inside the gas emission data may be found. The mode finds model and forecast model were presented, and the detailed approach to realize this forecast was also proposed, which have been applied to forecast the gas emission quantity efficiently.

  7. Reduced emissions of greenhouse gases 2050: Technological wedges - Input to the Commission on Low Emissions; Reduserte klimagassutslipp 2050: Teknologiske kiler - Innspill til Lavutslippsutvalget

    Energy Technology Data Exchange (ETDEWEB)

    Rosenberg, Eva; Espegren, Kari Aamodt; Finden, Per; Hageman, Rolf; Stenersen, Dag

    2006-09-15

    The Commission on Low Emissions was established in March 2005 and has been charged with the task of describing how Norway can achieve a 50-80 percent reduction in emissions of greenhouse gases by 2050. The commission describes the desired total reduction in emissions to be a set of actions or 'wedges', meaning that the reduction in emissions are linked to an array of technological and behavioural changes. The technological wedges are described here, while the behavioural wedges are treated in a different report. The potentials described are based on the Low Emission's reference line. Possible changes in the reference line will result in changed potentials. The technological wedges studied comprise to a great extent a potential of 50-80 percent reduction in greenhouse gases by 2050. This depends on considerable effort from research and development, and a determination to change external conditions.

  8. New technologies reduce greenhouse gas emissions from nitrogenous fertilizer in China.

    Science.gov (United States)

    Zhang, Wei-Feng; Dou, Zheng-Xia; He, Pan; Ju, Xiao-Tang; Powlson, David; Chadwick, Dave; Norse, David; Lu, Yue-Lai; Zhang, Ying; Wu, Liang; Chen, Xin-Ping; Cassman, Kenneth G; Zhang, Fu-Suo

    2013-05-21

    Synthetic nitrogen (N) fertilizer has played a key role in enhancing food production and keeping half of the world's population adequately fed. However, decades of N fertilizer overuse in many parts of the world have contributed to soil, water, and air pollution; reducing excessive N losses and emissions is a central environmental challenge in the 21st century. China's participation is essential to global efforts in reducing N-related greenhouse gas (GHG) emissions because China is the largest producer and consumer of fertilizer N. To evaluate the impact of China's use of N fertilizer, we quantify the carbon footprint of China's N fertilizer production and consumption chain using life cycle analysis. For every ton of N fertilizer manufactured and used, 13.5 tons of CO2-equivalent (eq) (t CO2-eq) is emitted, compared with 9.7 t CO2-eq in Europe. Emissions in China tripled from 1980 [131 terrogram (Tg) of CO2-eq (Tg CO2-eq)] to 2010 (452 Tg CO2-eq). N fertilizer-related emissions constitute about 7% of GHG emissions from the entire Chinese economy and exceed soil carbon gain resulting from N fertilizer use by several-fold. We identified potential emission reductions by comparing prevailing technologies and management practices in China with more advanced options worldwide. Mitigation opportunities include improving methane recovery during coal mining, enhancing energy efficiency in fertilizer manufacture, and minimizing N overuse in field-level crop production. We find that use of advanced technologies could cut N fertilizer-related emissions by 20-63%, amounting to 102-357 Tg CO2-eq annually. Such reduction would decrease China's total GHG emissions by 2-6%, which is significant on a global scale.

  9. A High Resolution Technology-based Emissions Inventory for Nepal: Present and Future Scenario

    Science.gov (United States)

    Sadavarte, P.; Das, B.; Rupakheti, M.; Byanju, R.; Bhave, P.

    2016-12-01

    A comprehensive regional assessment of emission sources is a major hindrance for a complete understanding of the air quality and for designing appropriate mitigation solutions in Nepal, a landlocked country in foothills of the Himalaya. This study attempts, for the first time, to develop a fine resolution (1km × 1km) present day emission inventory of Nepal with a higher tier approach using our understanding of the currently used technologies, energy consumption used in various energy sectors and its resultant emissions. We estimate present-day emissions of aerosols (BC, OC and PM2.5), trace gases (SO2, CO, NOX and VOC) and greenhouse gases (CO2, N2O and CH4) from non-open burning sources (residential, industry, transport, commercial) and open-burning sources (agriculture and municipal solid waste burning) for the base year 2013. We used methodologies published in literatures, and both primary and secondary data to estimate energy production and consumption in each sector and its sub-sector and associated emissions. Local practices and activity rates are explicitly accounted for energy consumption and dispersed often under-documented emission sources like brick manufacturing, diesel generator sets, mining, stone crushing, solid waste burning and diesel use in farms are considered. Apart from pyrogenic source of CH4 emissions, methanogenic and enteric fermentation sources are also accounted. Region-specific and newly measured country-specific emission factors are used for emission estimates. Activity based proxies are used for spatial and temporal distribution of emissions. Preliminary results suggest that 80% of national energy consumption is in residential sector followed by industry (8%) and transport (7%). More than 90% of the residential energy is supplied by biofuel which needs immediate attention to reduce emissions. Further, the emissions would be compared with other contemporary studies, regional and global datasets and used in the model simulations to

  10. Ship Compliance in Emission Control Areas: Technology Costs and Policy Instruments.

    Science.gov (United States)

    Carr, Edward W; Corbett, James J

    2015-08-18

    This paper explores whether a Panama Canal Authority pollution tax could be an effective economic instrument to achieve Emission Control Area (ECA)-like reductions in emissions from ships transiting the Panama Canal. This tariff-based policy action, whereby vessels in compliance with International Maritime Organisation (IMO) ECA standards pay a lower transit tariff than noncompliant vessels, could be a feasible alternative to petitioning for a Panamanian ECA through the IMO. A $4.06/container fuel tax could incentivize ECA-compliant emissions reductions for nearly two-thirds of Panama Canal container vessels, mainly through fuel switching; if the vessel(s) also operate in IMO-defined ECAs, exhaust-gas treatment technologies may be cost-effective. The RATES model presented here compares current abatement technologies based on hours of operation within an ECA, computing costs for a container vessel to comply with ECA standards in addition to computing the Canal tax that would reduce emissions in Panama. Retrofitted open-loop scrubbers are cost-effective only for vessels operating within an ECA for more than 4500 h annually. Fuel switching is the least-cost option to industry for vessels that operate mostly outside of ECA regions, whereas vessels operating entirely within an ECA region could reduce compliance cost with exhaust-gas treatment technology (scrubbers).

  11. Precision Agriculture Technologies Positively Contributing to GHG Emissions Mitigation, Farm Productivity and Economics

    Directory of Open Access Journals (Sweden)

    Athanasios Balafoutis

    2017-07-01

    Full Text Available Agriculture is one of the economic sectors that affect climate change contributing to greenhouse gas emissions directly and indirectly. There is a trend of agricultural greenhouse gas emissions reduction, but any practice in this direction should not affect negatively farm productivity and economics because this would limit its implementation, due to the high global food and feed demand and the competitive environment in this sector. Precision agriculture practices using high-tech equipment has the ability to reduce agricultural inputs by site-specific applications, as it better target inputs to spatial and temporal needs of the fields, which can result in lower greenhouse gas emissions. Precision agriculture can also have a positive impact on farm productivity and economics, as it provides higher or equal yields with lower production cost than conventional practices. In this work, precision agriculture technologies that have the potential to mitigate greenhouse gas emissions are presented providing a short description of the technology and the impacts that have been reported in literature on greenhouse gases reduction and the associated impacts on farm productivity and economics. The technologies presented span all agricultural practices, including variable rate sowing/planting, fertilizing, spraying, weeding and irrigation.

  12. Radiative Forcing associated with Particulate Carbon Emissions resulting from the Use of Mercury Control Technology

    Science.gov (United States)

    Clack, H.; Penner, J. E.; Lin, G.

    2013-12-01

    Mercury is a persistent, toxic metal that bio-accumulates within the food web and causes neurological damage and fetal defects in humans. The U.S. was the first country to regulate the leading anthropogenic source of mercury into the atmosphere: coal combustion for electric power generation. The U.S. EPA's 2005 Clean Air Mercury Rule (CAMR) was replaced and further tightened in 2012 by the Mercury and Air Toxics Standard (MATS), which required existing coal-fired utilities to reduce their mercury emissions by approximately 90% by 2015. Outside the U.S., the Governing Council of the United Nations Environment Programme (UNEP) has passed the legally binding Minamata global mercury treaty that compels its signatory countries to prevent and reduce the emission and release of mercury. The most mature technology for controlling mercury emissions from coal combustion is the injection into the flue gas of powdered activated carbon (PAC) adsorbents having chemically treated surfaces designed to rapidly oxidize and adsorb mercury. However, such PAC is known to have electrical properties that make it difficult to remove from flue gas via electrostatic precipitation, by far the most common particulate control technology used in countries such as the U.S., India, and China which rely heavily on coal for power generation. As a result, PAC used to control mercury emissions can be emitted into the atmosphere, the sub-micron fraction of which may result in unintended radiative forcing similar to black carbon (BC). Here, we estimate the potential increases in secondary BC emissions, those not produced from combustion but arising instead from the use of injected PAC for mercury emission reduction. We also calculate the radiative forcing associated with these secondary BC emissions by using a global atmospheric chemical transport model coupled with a radiative transfer model.

  13. Trajectories towards clean technology. Example of volatile organic compound emission reductions

    Energy Technology Data Exchange (ETDEWEB)

    Belis-Bergouignan, Marie-Claude; Oltra, Vanessa; Saint Jean, Maider [IFREDE-E3i, University Montesquieu-Bordeaux IV, Avenue Leon Duguit, Pessac 33608 (France)

    2004-02-20

    This article is based on the observation that, up until now, corporate investment has been limited in clean technologies despite the will of governmental authorities to stimulate them in order to cope with the demands of sustainable development. The paper deals with the issue of the development of clean technologies and the role of regulations as clean technology promoters. It tries to apprehend the characteristics and specificity of clean technology from both an empirical and a theoretical point of view, so as to understand which are the most favourable (or inversely, the most detrimental) conditions for their development. We use case studies concerning the reduction of volatile organic compound (VOC) emissions in the chemical and metallurgical industries. These two examples highlight the problems created by the shift from a 'with-solvent paradigm' to a 'solvent-free paradigm' and the way clean technology trajectories may spread within such paradigms. We show that the problem of clean technology development primarily resides in some factors that impede technological adoption, although a strong and mixed incentives framework prevails. Such impediments are sector-specific, leading to different clean technology trajectories among sectors and indicating areas of sectoral intervention that could become the cornerstones of complementary technology policy.

  14. Europaeische Klimapolitik mit handelbaren Emissionslizenzen

    OpenAIRE

    Fritz Rahmeyer

    2004-01-01

    With the adoption of the „Directive 2003/87/EU of the European Parliament and the Council …“ greenhouse gas emission allowance trading within the community will begin in 2005. Emission trading is a flexible instrument to abate emissions within the framework of the Kyoto-Protocol that provides besides the first binding agreement concerning emission abatement above all an institutional lead-in to a preventive protection against anthropogenic climate change. At present command-and-control regula...

  15. Growth promoting technologies reduce greenhouse gas, alcohol, and ammonia emissions from feedlot cattle.

    Science.gov (United States)

    Stackhouse-Lawson, K R; Calvo, M S; Place, S E; Armitage, T L; Pan, Y; Zhao, Y; Mitloehner, F M

    2013-11-01

    Increased animal productivity has the potential to reduce the environmental impact per unit of consumable product and is believed to be the most promising and sustainable mitigation technique to meet increasing demand for high quality protein. The feedlot industry uses ionophores, antibiotics, growth implants, and β2-adrenergic agonists to improve health and growth performance of cattle. These technologies not only increase productivity but also alter microbes in the rumen and increase nitrogen retention in the animal, which may lead to changes in greenhouse gas (GHG), volatile organic compound (VOC), and ammonia (NH3) emissions from feedlot cattle. The present study investigated GHG, VOC, and NH3 emissions from 160 Angus crossbred steers. Steers were blocked by weight in a randomized block design and assigned to 16 pens of 10 animals each. Treatments applied were 1) control (CON; no technology application), 2) monensin and tylosin phosphate (MON), 3) monensin, tylosin phosphate, and growth implant (IMP), and 4) monensin, tylosin phosphate, growth implant, and zilpaterol hydrochloride (fed during the last 20 d of the feeding period; BAA). Cattle were on feed for an average of 107 d. Performance variables (DMI, BW, ADG, and G:F) and carcass traits (HCW, dressing percent, KPH, LM area, fat thickness, marbling score, yield grade, and quality grade) were measured. Gaseous emissions were measured during the last 10 d of the feeding period when animals were housed in 4 totally enclosed identical cattle pen enclosures. To quantify gaseous emissions a 4×4 Latin square design (n=4) was used. Gaseous emissions were analyzed using Proc Mixed in SAS and reported in grams per kilogram HCW per day and grams per kilogram per animal per hour. Treatment with IMP and BAA increased (PMethane emissions were similar for CON and IMP treated cattle. Nitrous oxide emissions were similar across CON, MON, and IMP treated cattle and were higher in BAA treated cattle (Papplication of growth

  16. Microbial methane oxidation processes and technologies for mitigation of landfill gas emissions

    DEFF Research Database (Denmark)

    Scheutz, Charlotte; Kjeldsen, Peter; Bogner, J.E.;

    2009-01-01

    utilizing oxygen that diffuses into the cover layer from the atmosphere. The methane oxidation process, which is governed by several environmental factors, can be exploited in engineered systems developed for methane emission mitigation. Mathematical models that account for methane oxidation can be used...... to predict methane emissions from landfills. Additional research and technology development is needed before methane mitigation technologies utilizing microbial methane oxidation processes can become commercially viable and widely deployed.......Landfill gas containing methane is produced by anaerobic degradation of organic waste. Methane is a strong greenhouse gas and landfills are one of the major anthropogenic sources of atmospheric methane. Landfill methane may be oxidized by methanotrophic microorganisms in soils or waste materials...

  17. Technology for reduced emission of climate gases; Teknologi for reduserte klimagassutslipp

    Energy Technology Data Exchange (ETDEWEB)

    Soerheim, Hans-Roar [Christian Michelsen Research A/S, Bergen (Norway)

    1998-07-01

    The presentation discusses the emission sources and possible technological measures, describes the KLIMATEK programme, surveys status and results and points out further challenges. Instruments are green taxes and quota systems, regulations and voluntary agreements, research and development and new technology, and flexible implementation mechanisms. In Norway, possible measures can be taken in (1) offshore oil and gas production, (2) refineries and gas processing plants, (3) petrochemical industry, (4) aluminium and ferro-industry, (5) cement production, (6) ammonia production, (7) production of nitric acid, (8) pulp and paper industry, (9) landfills and waste processing, (10) transport.

  18. Will Aerosol Hygroscopicity Change with Biodiesel, Renewable Diesel Fuels and Emission Control Technologies?

    Science.gov (United States)

    Vu, Diep; Short, Daniel; Karavalakis, Georgios; Durbin, Thomas D; Asa-Awuku, Akua

    2017-02-07

    The use of biodiesel and renewable diesel fuels in compression ignition engines and aftertreatment technologies may affect vehicle exhaust emissions. In this study two 2012 light-duty vehicles equipped with direct injection diesel engines, diesel oxidation catalyst (DOC), diesel particulate filter (DPF), and selective catalytic reduction (SCR) were tested on a chassis dynamometer. One vehicle was tested over the Federal Test Procedure (FTP) cycle on seven biodiesel and renewable diesel fuel blends. Both vehicles were exercised over double Environmental Protection Agency (EPA) Highway fuel economy test (HWFET) cycles on ultralow sulfur diesel (ULSD) and a soy-based biodiesel blend to investigate the aerosol hygroscopicity during the regeneration of the DPF. Overall, the apparent hygroscopicity of emissions during nonregeneration events is consistently low (κ < 0.1) for all fuels over the FTP cycle. Aerosol emitted during filter regeneration is significantly more CCN active and hygroscopic; average κ values range from 0.242 to 0.439 and are as high as 0.843. Regardless of fuel, the current classification of "fresh" tailpipe emissions as nonhygroscopic remains true during nonregeneration operation. However, aftertreatment technologies such as DPF, will produce significantly more hygroscopic particles during regeneration. To our knowledge, this is the first study to show a significant enhancement of hygroscopic materials emitted during DPF regeneration of on-road diesel vehicles. As such, the contribution of regeneration emissions from a growing fleet of diesel vehicles will be important.

  19. Assessment of Current and Future Air Pollutant Emission Reduction Technologies for Marine Diesel Engines

    Science.gov (United States)

    2014-02-01

    sulphur present in fuel: the less sulphur content in the fuel, the less SOx in the exhaust. SOx cause acid rain and SOx oxidation in the atmosphere...gases contain gaseous sulphur species that form sulphuric acid , causing corrosion problems [9]. Presentations to the cruise industry in 2009 by MAN...emerging. Most of the air pollutant emission control technologies focus on reducing concentration of nitrogen oxides (NOx), sulphur oxides (SOx), or

  20. Study of the technology of the plasma nanostructuring of silicon to form highly efficient emission structures

    Energy Technology Data Exchange (ETDEWEB)

    Galperin, V. A.; Kitsyuk, E. P. [“Technological Center” Research-and-Production Company (Russian Federation); Pavlov, A. A. [Russian Academy of Sciences, Institute of Nanotechnologies in Microelectronics (Russian Federation); Shamanaev, A. A., E-mail: artemiy.shamanaev@tcen.ru [“Technological Center” Research-and-Production Company (Russian Federation)

    2015-12-15

    New methods for silicon nanostructuring and the possibility of raising the aspect ratios of the structures being formed are considered. It is shown that the technology developed relates to self-formation methods and is an efficient tool for improving the quality of field-emission cathodes based on carbon nanotubes (CNTs) by increasing the Si–CNT contact area and raising the efficiency of the heat sink.

  1. Regional increase in value with vegetable oil as motor fuel and raw material; Regionale Wertschoepfung mit Pflanzenoel als Kraft- und Rohstoff

    Energy Technology Data Exchange (ETDEWEB)

    Wolf, J.; Santruschek, R.; Oettel, E.

    2001-07-01

    The Incentive Association Renewable Energies (Foerdergesellschaft Erneuerbare Energien e.V) and Charitable Association for Education and Development (Gemeinnuetzige Bildungs- und Entwicklungsgesellschaft) 'Schliebener Land mbH' took the initiative in the Land Brandenburg three years ago to build a regional chain of increase in value with rape oil in conjunction with the retrofitting of diesel operated vehicles (with chamber engines) to vegetable oil operation. Core of this joint initiative is the use of natural rape oil as motor fuel that is supplemented with the use of the rape oil substances and other vegetable oil gained from regional cultivation. The authorisation of the peripheral retrofitting in terms of operation technology and emission by certified state authorities was the absolute pre-condition. (orig.) [German] Gemeinsam haben die Foerdergesellschaft Erneuerbare Energien e.V. und die Gemeinnuetzige Bildungs- und Entwicklungsgesellschaft (GBE) 'Schliebener Land' mbH, Hohenbucko vor drei Jahren im Land Brandenburg die Initiativen ergriffen, eine regionale Wertschoepfungskette mit Rapsoel in Verbindung mit der Umruestung von Dieselfahrzeugen (mit Kammermotoren) auf Pflanzenoelbetrieb aufzubauen. Kern dieser gemeinsamen Initiative ist die Nutzung von naturbelassenem Rapsoel als Kraftstoff, das durch die Stoffliche Nutzung von Rapsoel und anderen Pflanzenoelen aus regionalem Anbau ergaenzt wird. Absolute Voraussetzung war dabei die betriebstechnische und emissionsrechtliche Zulassung der peripheren Umruestung durch zertifizierte staatliche Stellen. (orig.)

  2. Health effects of measures and technologies of the energy transition. The views expressed in this paper need not necessarily coincide with those of the Environment Agency; Gesundheitliche Auswirkungen von Massnahmen und Technologien der Energiewende. Die in diesem Beitrag geaeusserten Ansichten muessen nicht notwendigerweise mit denen des Umweltbundesamtes uebereinstimmen

    Energy Technology Data Exchange (ETDEWEB)

    Plass, Dietrich [Umweltbundesamt, Berlin (Germany). Fachrichtung: Expositionsschaetzung, gesundheitsbezogene Indikatoren; Conrad, Andre

    2017-06-01

    A sustainable supply of future generations with energy is not possible on the basis of fossil and nuclear energy sources. With the measures and technologies used, energy transition offers the opportunity to gradually reduce the use of these energy sources and to convert the energy supply system to the use of renewable energies. This chapter has shown that the departure from the existing system can contribute to a significant improvement in the health of the population. However, it is important parallel to the nationwide implementation of measures and technologies of the energy transition to ensure a continuous monitoring of possible health effects in order to be able to respond to potential risks at an early stage and to take adequate measures to reduce them. [German] Eine nachhaltige Versorgung zukuenftiger Generationen mit Energie ist auf Basis fossiler und nuklearer Energiequellen nicht moeglich. Die Energiewende bietet mit den eingesetzten Massnahmen und Technologien die Moeglichkeit, die Nutzung dieser Energiequellen sukzessiv abzubauen und das Energieversorgungssystem auf die Verwendung erneuerbarer Energien umzustellen. Das vorliegende Kapitel hat aufgezeigt, dass die Abkehr vom bestehenden System zu einer deutlichen Verbesserung der Bevoelkerungsgesundheit beitragen kann. Es ist jedoch wichtig, bei der flaechendeckenden Einfuehrung von Massnahmen und Technologien der Energiewende eine kontinuierliche Beobachtung moeglicher Effekte auf die Gesundheit sicherzustellen, um fruehzeitig auf potenzielle Risiken reagieren zu koennen und adaequate Massnahmen zu ihrer Reduktion zu ergreifen.

  3. GENERIC VERIFICATION PROTOCOL FOR DETERMINATION OF EMISSIONS REDUCTIONS FROM SELECTIVE CATALYTIC REDUCTIONS CONTROL TECHNOLOGIES FOR HIGHWAY, NONROAD, AND STATIONARY USE DIESEL ENGINES

    Science.gov (United States)

    The protocol describes the Environmental Technology Verification (ETV) Program's considerations and requirements for verification of emissions reduction provided by selective catalytic reduction (SCR) technologies. The basis of the ETV will be comparison of the emissions and perf...

  4. Greenhouse gas emissions reduction in China by cleaner coal technology towards 2020

    DEFF Research Database (Denmark)

    Zhao, Guangling; Chen, Sha

    2015-01-01

    the complete life cycle modeling of CCTs. The advanced technologies include super-critical (super-C), ultra super-critical (USC) and integrated gasification combined cycle (IGCC). The results show that the higher efficiency technologies have lower potential impacts. Compared with the average level of power...... generation technology, CO2 emissions reduction is 6.4% for super-C, 37.4% for USC and 61.5% for IGCC. Four coal power scenarios are developed based on the assumption of potential investment power for CCTs in 2020, which are super-C, USC, USC and old low efficiency generation substitution by USC, IGCC...... and carbon capture and storage (CCS). The CO2 emissions intensity is 1.93 kg/kWh for super-C, 1.69 kg/kWh for USC, 1.59 kg/kWh for USC + replacement and 1.29 kg/kWh for IGCC + CCS. The CO2 emissions intensity was 1.95 kg/kWh in 2010, which had decreased 5.5% compared with the level in 2005. The energy...

  5. The micro turbine: the MIT example; La micro turbine: l'exemple du MIT

    Energy Technology Data Exchange (ETDEWEB)

    Ribaud, Y. [Office National d' Etudes et de Recherches Aerospatiales (ONERA-DEFA), 92 - Chatillon (France)

    2001-10-01

    The micro turbine study began a few years ago at the MIT, with the participation of specialists from different fields. The purpose is the development of a MEMS (micro electro mechanical systems) based, 1 cm in diameter, micro gas turbine. Potential applications are devoted to micro drone propulsion, electric power generation for portable power sources in order to replace heavy Lithium batteries, satellite motorization, the surface distributed power for boundary suction on plane wings. The manufacturing constraints at such small scales lead to 2-D extruded shapes. The physical constraints stem from viscous effects and from limitations given by 2-D geometry. The time scales are generally shorter than for conventional machines. Otherwise the material properties are better at such length scales. Transposition from conventional turbomachinery laws is no more applicable and new design methods must be established. The present paper highlights the project progress and the technology breakthroughs. (author)

  6. Effectiveness of emission control technologies for auxiliary engines on ocean-going vessels.

    Science.gov (United States)

    Jayaram, Varalakshmi; Nigam, Abhilash; Welch, William A; Miller, J Wayne; Cocker, David R

    2011-01-01

    Large auxiliary engines operated on ocean-going vessels in transit and at berth impact the air quality of populated areas near ports. This paper presents new information on the comparison of emission ranges from three similar engines and the effectiveness of three control technologies: switching to cleaner burning fuels, operating in the low oxides of nitrogen (NOx) mode, and selective catalytic reduction (SCR). In-use measurements of gaseous (NOx, carbon monoxide [CO], carbon dioxide [CO2]) and fine particulate matter (PM2.5; total and speciated) emissions were made on three auxiliary engines on post-PanaMax class container vessels following the International Organization for Standardization-8178-1 protocol. The in-use NOx emissions for the MAN B&W 7L32/40 engine family vary from 15 to 21.1 g/kW-hr for heavy fuel oil and 8.9 to 19.6 g/kW-hr for marine distillate oil. Use of cleaner burning fuels resulted in NOx reductions ranging from 7 to 41% across different engines and a PM2.5 reduction of up to 83%. The NOx reductions are a consequence of fuel nitrogen content and engine operation; the PM2.5 reduction is attributed to the large reductions in the hydrated sulfate and organic carbon (OC) fractions. As expected, operating in the low-NOx mode reduced NOx emissions by approximately 32% and nearly doubled elemental carbon (EC) emissions. However, PM2.5 emission factors were nearly unchanged because the EC emission factor is only approximately 5% of the total PM2.5 mass. SCR reduced the NOx emission factor to less than 2.4 g/kW-hr, but it increased the PM2.5 emissions by a factor of 1.5-3.8. This increase was a direct consequence of the conversion of sulfur dioxide to sulfate emissions on the SCR catalyst. The EC and OC fractions of PM2.5 reduced across the SCR unit.

  7. Carbon dioxide emission in hydrogen production technology from coke oven gas with life cycle approach

    Directory of Open Access Journals (Sweden)

    Burmistrz Piotr

    2016-01-01

    Full Text Available The analysis of Carbon Footprint (CF for technology of hydrogen production from cleaned coke oven gas was performed. On the basis of real data and simulation calculations of the production process of hydrogen from coke gas, emission indicators of carbon dioxide (CF were calculated. These indicators are associated with net production of electricity and thermal energy and direct emission of carbon dioxide throughout a whole product life cycle. Product life cycle includes: coal extraction and its transportation to a coking plant, the process of coking coal, purification and reforming of coke oven gas, carbon capture and storage. The values were related to 1 Mg of coking blend and to 1 Mg of the hydrogen produced. The calculation is based on the configuration of hydrogen production from coke oven gas for coking technology available on a commercial scale that uses a technology of coke dry quenching (CDQ. The calculations were made using ChemCAD v.6.0.2 simulator for a steady state of technological process. The analysis of carbon footprint was conducted in accordance with the Life Cycle Assessment (LCA.

  8. Cost-Benefit Analysis For Alternative Low-Emission Surface Preparation/ Depainting Technologies for Structural Steel

    Science.gov (United States)

    Lewis, Pattie

    2007-01-01

    Stennis Space Center (SSC), Kennedy Space Center (KSC) and Air Force Space Command (AFSPC) identified particulate emissions and waste generated from the depainting process of steel structures as hazardous materials to be eliminated or reduced. A Potential Alternatives Report, Potential Alternatives Report for Validation of Alternative Low Emission Surface Preparation/Depainting Technologies for Structural Steel, provided a technical analyses of identified alternatives to the current coating removal processes, criteria used to select alternatives for further analysis, and a list of those alternatives recommended for testing. The initial coating removal alternatives list was compiled using literature searches and stakeholder recommendations. The involved project participants initially considered approximately 13 alternatives. In late 2003, core project members selected the following depainting processes to be further evaluated: (1) Plastic Blast Media-Quickstrip(R)-A. (2) Hard Abrasive-Steel-Magic(R). (3) Sponge Blasting-Sponge-Jet(R). (4) Liquid Nitrogen-NItroJet(R). (5) Mechanical Removal with Vacuum Attachment-DESCO and OCM Clean-Air (6) Laser Coating Removal Alternatives were tested in accordance with the Joint Test Protocol for Validation of Alternative Low-Emission Surface Preparation/Depainting Technologies for Structural Steel, and the Field Evaluation Test Plan for Validation of Alternative Low-Emission Surface Preparation/Depainting Technologies for Structural Steel. Results of the testing are documented in the Joint Test Report. This Cost-Benefit Analysis (CBA) focuses on the three alternatives (Quickstrip(R)-A, SteelMagic (R), and Sponge-Jet(R)) that were considered viable alternatives for large area operations based on the results of the field demonstration and lab testing. This CBA was created to help participants determine if implementation of the candidate alternatives is economically justified. Each of the alternatives examined reduced Environmental

  9. Carbon Dioxide Separation from Flue Gases: A Technological Review Emphasizing Reduction in Greenhouse Gas Emissions

    Science.gov (United States)

    Songolzadeh, Mohammad; Soleimani, Mansooreh; Takht Ravanchi, Maryam; Songolzadeh, Reza

    2014-01-01

    Increasing concentrations of greenhouse gases (GHGs) such as CO2 in the atmosphere is a global warming. Human activities are a major cause of increased CO2 concentration in atmosphere, as in recent decade, two-third of greenhouse effect was caused by human activities. Carbon capture and storage (CCS) is a major strategy that can be used to reduce GHGs emission. There are three methods for CCS: pre-combustion capture, oxy-fuel process, and post-combustion capture. Among them, post-combustion capture is the most important one because it offers flexibility and it can be easily added to the operational units. Various technologies are used for CO2 capture, some of them include: absorption, adsorption, cryogenic distillation, and membrane separation. In this paper, various technologies for post-combustion are compared and the best condition for using each technology is identified. PMID:24696663

  10. Carbon dioxide separation from flue gases: a technological review emphasizing reduction in greenhouse gas emissions.

    Science.gov (United States)

    Songolzadeh, Mohammad; Soleimani, Mansooreh; Takht Ravanchi, Maryam; Songolzadeh, Reza

    2014-01-01

    Increasing concentrations of greenhouse gases (GHGs) such as CO2 in the atmosphere is a global warming. Human activities are a major cause of increased CO2 concentration in atmosphere, as in recent decade, two-third of greenhouse effect was caused by human activities. Carbon capture and storage (CCS) is a major strategy that can be used to reduce GHGs emission. There are three methods for CCS: pre-combustion capture, oxy-fuel process, and post-combustion capture. Among them, post-combustion capture is the most important one because it offers flexibility and it can be easily added to the operational units. Various technologies are used for CO2 capture, some of them include: absorption, adsorption, cryogenic distillation, and membrane separation. In this paper, various technologies for post-combustion are compared and the best condition for using each technology is identified.

  11. Resistor dividers on the march; Vorwaerts mit ohmschen Spannungsteilern

    Energy Technology Data Exchange (ETDEWEB)

    Wollschlaeger, P. [Siemens AG, Erlangen (Germany). Bereich Energieuebertragung und -verteilung

    2000-02-07

    Rising costs and the growing scope of functions demanded nowadays of a medium-voltage switchpanel are forcing manufactures to turn to innovative, intelligent solutions. Frequently, customer specifications cannot be costeffectively met with conventional technology; new ground has to be broken. A typical example is the superseding of conventional voltage transformers (with separate cores for protection and measurement) by a voltage sensor with interface to an instrument amplifier. The advantages are clear: Voltage sensors that no longer need to be configured according to network data and purpose of use. It is time for sensorics to find their way into medium voltage equipment; in industrial processes sensors are already long established. (orig.) [German] Steigender Kostendruck bei gleichzeitig zunehmender Funktionalitaet, die heute von einem Mittelspannungsschaltfeld gefordert wird, zwingt den Hersteller zu neuen, intelligenten Loesungen. Zunehmend sind die Kundenwuensche mit konventioneller Technik nicht mehr kostenguenstig zu realisieren, sondern erfordern es, neue Wege zu beschreiten. Ein Beispiel dafuer ist der Ersatz konventioneller Spannungswandler mit getrennten Kernen fuer Schutz und Messung durch einen Spannungssensor mit Schnittstelle zu einem Messverstaerker. Der Vorteil sind Spannungssensoren, die nicht mehr individuell nach Netzdaten und Verwendungszweck projektiert werden muessen. Es wird Zeit, dass die Sensortechnik auch in der Mittelspannung einzieht - in industriellen Prozessen sind Sensoren schon lange im Einsatz. (orig.)

  12. Time Resolved Measurements of Speciated Tailpipe Emissions from Motor Vehicles: Trends with Emission Control Technology, Cold Start Effects, and Speciation.

    Science.gov (United States)

    Drozd, Greg T; Zhao, Yunliang; Saliba, Georges; Frodin, Bruce; Maddox, Christine; Weber, Robert J; Chang, M-C Oliver; Maldonado, Hector; Sardar, Satya; Robinson, Allen L; Goldstein, Allen H

    2016-12-20

    Experiments were conducted at the California Air Resources Board Haagen-Smit Laboratory to understand changes in vehicle emissions in response to stricter emissions standards over the past 25 years. Measurements included a wide range of volatile organic compounds (VOCs) for a wide range of spark ignition gasoline vehicles meeting varying levels of emissions standards, including all certifications from Tier 0 up to Partial Zero Emission Vehicle. Standard gas chromatography (GC) and high performance liquid chromatography (HLPC) analyses were employed for drive-cycle phase emissions. A proton-transfer-reaction mass spectrometer measured time-resolved emissions for a wide range of VOCs. Cold-start emissions occur almost entirely in the first 30-60 s for newer vehicles. Cold-start emissions have compositions that are not significantly different across all vehicles tested and are markedly different from neat fuel. Hot-stabilized emissions have varying importance depending on species and may require a driving distance of 200 miles to equal the emissions from a single cold start. Average commute distances in the U.S. suggest the majority of in-use vehicles have emissions dominated by cold starts. The distribution of vehicle ages in the U.S. suggests that within several years only a few percent of vehicles will have significant driving emissions compared to cold-start emissions.

  13. Greenhouse gas emissions reduction in China by cleaner coal technology towards 2020

    DEFF Research Database (Denmark)

    Zhao, Guangling; Chen, Sha

    2015-01-01

    The Chinese energy system, a major CO2 emitter, relies heavily on fossil fuels, especially coal. Coal will continue to play a major role in the new installed power generation capacity in the future, which will cause unavoidable environmental problems. Clean coal technologies (CCTs) are essential...... generation technology, CO2 emissions reduction is 6.4% for super-C, 37.4% for USC and 61.5% for IGCC. Four coal power scenarios are developed based on the assumption of potential investment power for CCTs in 2020, which are super-C, USC, USC and old low efficiency generation substitution by USC, IGCC...... and carbon capture and storage (CCS). The CO2 emissions intensity is 1.93 kg/kWh for super-C, 1.69 kg/kWh for USC, 1.59 kg/kWh for USC + replacement and 1.29 kg/kWh for IGCC + CCS. The CO2 emissions intensity was 1.95 kg/kWh in 2010, which had decreased 5.5% compared with the level in 2005. The energy...

  14. Faster, deeper and safer drilling with tailor-made ``designer tools`` - a new approach in borehole technology; Schneller, weiter und sicherer Bohren mit massgeschneiderten ``Designer Garnituren`` - Ein neuer Ansatz in der Bohrtechnologie

    Energy Technology Data Exchange (ETDEWEB)

    Reich, M. [Technical Services Baker Hughes INTEQ, Celle (Germany)

    1998-12-31

    In the past few years, progress has been made in all deep drilling components, but a systemic approach tends to be neglected. Combinations of optimized components alone will not ensure maximum heading rates, long life and economic efficiency. Since about two years ago, research is being made into ``designer tool combinations``. The contribution describes a typical example along with the software used to select the components. (orig.) [Deutsch] In den vergangenen Jahren sind deutliche Fortschritte bei der Entwicklung aller fuer Tiefbohrungen erforderlicher Komponenten erzielt worden. Vermisst wird aber ein Ansatz zum Systemdenken, da leider haeufig das Zusammenspiel dieser Komponenten im praktischen Einsatz nicht beruecksichtigt wird. Die Kombination optimierter Einzelkomponenten allein fuehrt weder zu maximalem Bohrfortschritt noch zu hoechster Lebensdauer oder einem wirtschaftlichen Optimum. Beste Ergebnisse sind vielmehr von Bohrgarnituren zu erwarten, die nach mechanischen und hydraulischen Gesetzmaessigkeiten fuer eine maximale Leistung des Gesamtsystems zusammengestellt werden. Diese relativ einfache Erkenntnis wird erst seit kurzem systematisch in die Praxis umgesetzt. In den letzten zwei Jahren wurden mehrere umfassende Programme zur Optimierung von Bohrgarnituren durchgefuehrt. Die Ergebnisse, die mit diesen `Designer-Bohrgarnituren` erzielt wurden, demonstrieren in eindrucksvoller Weise das Verbesserungspotential. Nachfolgend werden die typischen Komponenten einer `Designer-Garnitur` beschrieben und ein Einblick in die Software gegeben, die zur Optimierung eingesetzt wird. Die erreichten Verbesserungen gegenueber den zuvor benutzten konventionellen Garnituren werden mit Fallbeispielen belegt. (orig.)

  15. A Close Analysis of Developments in Diesel Engine Emission Reduction Technologies

    Directory of Open Access Journals (Sweden)

    Raghav Ahuja

    2013-06-01

    Full Text Available Diesel engines have the potential to significantly increase vehicle fuel economy and decrease CO 2 emissions; however, efficient removal of NO x and particulate matter from the engine exhaust is required to meet stringent emission standards. Diesel aftertreatment systems being used consists of a Diesel Oxidation Catalyst (DOC, a urea-based Selective Catalyst Reduction (SCR catalyst and a diesel particulate filter (DPF, and is widely used to meet the most recent NO x (nitrogen oxides comprising NO and NO 2 and particulate matter (PM emission standards for medium and heavy-duty sport utility and truck vehicles. The most efficient way and the best available technology (BAT to radically reduce the critical Diesel emission components particles (PM&NP and nitric oxides (NO x are combined exhaust gas aftertreatment systems (DPF+SCR. SCR (selective catalytic reduction is regarded as the most efficient deNO x -system, diesel particle filters are most efficient for soot abatement. Today, several suppliers offer combined systems for retrofitting of HD vehicles.

  16. Reviews on current carbon emission reduction technologies and projects and their feasibilities on ships

    Science.gov (United States)

    Wang, Haibin; Zhou, Peilin; Wang, Zhongcheng

    2017-06-01

    Concern about global climate change is growing, and many projects and researchers are committed to reducing greenhouse gases from all possible sources. International Maritime (IMO) has set a target of 20% CO2 reduction from shipping by 2020 and also presented a series of carbon emission reduction methods, which are known as Energy Efficiency Design Index (EEDI) and Energy Efficiency Operation Indicator (EEOI). Reviews on carbon emission reduction from all industries indicate that, Carbon Capture and Storage (CCS) is an excellent solution to global warming. In this paper, a comprehensive literature review of EEDI and EEOI and CCS is conducted and involves reviewing current policies, introducing common technologies, and considering their feasibilities for marine activities, mainly shipping. Current projects are also presented in this paper, thereby illustrating that carbon emission reduction has been the subject of attention from all over the world. Two case ship studies indicate the economic feasibility of carbon emission reduction and provide a guide for CCS system application and practical installation on ships.

  17. Ätzen von Titannitrid mit Halogenverbindungen

    OpenAIRE

    Hellriegel, Ronald

    2009-01-01

    Mit zunehmender Miniaturisierung mikroelektronischer Bauelemente steigen die Anforderungen an reproduzierbare qualitätskonforme Schichten. Um die zur Herstellung notwendigen ALD/PVD/CVD-Schichtabscheideanlagen in einen zuverlässigen Zustand zu versetzen, ist eine regelmäßige Kammerreinigung notwendig. Während des Abscheideprozesses werden nicht nur das Substrat, sondern auch die umliegenden Kammerteile beschichtet. Diese Schichten wachsen mit jedem Beschichtungszyklus weiter an. Der Stres...

  18. Photovoltaik Hybrid-Solarzellen mit Nanopartikeln

    Science.gov (United States)

    Leute, Angelika

    2004-09-01

    Die organische Photovoltaik auf der Basis halbleitender Polymere bietet eine kostengünstige Alternative zu Solarzellen aus Silizium. Allerdings weisen die organischen Materialien relativ schlechte Ladungstransporteigenschaften auf. Hybrid-Solarzellen, in denen Polymere mit geeigneten anorganischen Halbleitern kombiniert sind, besitzen einerseits die praktischen Vorteile der Organik und andererseits die hohe Elektronenbeweglichkeit der anorganischen Materialien. Wissenschaftler der Technischen Universität Eindhoven haben kürzlich Hybrid-Solarzellen vorgestellt, die aus einem halbleitenden Polymer mit Zinkoxid-Nanopartikeln bestehen.

  19. Dual-fuel natural gas/diesel engines: Technology, performance, and emissions

    Science.gov (United States)

    Turner, S. H.; Weaver, C. S.

    1994-11-01

    An investigation of current dual-fuel natural gas/diesel engine design, performance, and emissions was conducted. The most pressing technological problems associated with dual-fuel engine use were identified along with potential solutions. It was concluded that dual-fuel engines can achieve low NO(sub x) and particulate emissions while retaining fuel-efficiency and BMEP levels comparable to those of diesel engines. The investigation also examined the potential economic impact of dual-fuel engines in diesel-electric locomotives, marine vessels, farm equipment, construction, mining, and industrial equipment, and stand-alone electricity generation systems. Recommendations for further additional funding to support research, development, and demonstration in these applications were then presented.

  20. Emission model for landfills with mechanically-biologically pretreated waste, with the emphasis on modelling the gas balance; Emissionsprognosemodell fuer Deponien mit mechanisch-biologisch vorbehandelten Abfaellen - Schwerpunkt: Modellierung des Gashaushaltes

    Energy Technology Data Exchange (ETDEWEB)

    Danhamer, H.

    2001-07-01

    The objective of this work was to determine influence factors on processes going on in landfills with mechanically-biologically pretreated waste (MBP-landfills) in order to predict emissions. For this purpose a computer based model has been developed. The model allows to simulate the gas, water and heat balance as well as settlement processes and was called DESIM2005 (version MB). It is based on theoretical modeling approaches as well as data from lab and reactor experiments. The main focus of model application was to determine factors influencing the gas phase and the emissions of landfill gas and methane during operation and aftercare of MBP-landfills. By performing simulations the effects of changing parameters for the processes gas transport and biological degradation as well as the effects of different qualities in waste pretreatment and of varying landfill operation techniques were investigated. Possibilities for increasing the environmental sustainability of landfills containing mechanically-biologically pretreated waste were shown. (orig.)

  1. Mini-PROven. Reduced emissions from small and medium-size coke ovens thanks to single-chamber pressure control; Mini-PROven. Emissionsreduzierung an kleinen und mittleren Koksoefen mit einer Einzelkammerdruckregelung

    Energy Technology Data Exchange (ETDEWEB)

    Huhn, Friedrich; Krebber, Frank; Kuehn-Gajdzik, Joanna; Ueberschaer, Kerstin [ThyssenKrupp Uhde GmbH, Dortmund (Germany). Coke Plant Technologies Div.

    2012-07-01

    For environment and occupational health reasons it is becoming increasingly important for coke plants to be operated with the lowest possible level of emissions. In the past, changing pressure conditions in each individual oven, with particularly high values at the beginning of the coking period, often resulted in considerable emissions at the oven closures. To prevent this happening on modern large-scale ovens, ThyssenKrupp Uhde developed the PROven trademark (Pressure Regulated Oven), a single-chamber pressure control system which regulates the pressure in the individual coke chambers down to a constantly low level. In the meantime, after many years of successful service, the system has been upgraded in both its design and process engineering. The result is Mini-PROven, which in future can also be retro-fitted to old small and medium-size coke oven batteries in the interest of better environmental protection. (orig.)

  2. Low Emissions Burner Technology for Metal Processing Industry using Byproducts and Biomass Derived Liquid Fuels

    Energy Technology Data Exchange (ETDEWEB)

    Agrawal, Ajay; Taylor, Robert

    2013-09-30

    This research and development efforts produced low-emission burner technology capable of operating on natural gas as well as crude glycerin and/or fatty acids generated in biodiesel plants. The research was conducted in three stages (1) Concept definition leading to the design and development of a small laboratory scale burner, (2) Scale-up to prototype burner design and development, and (3) Technology demonstration with field vefiication. The burner design relies upon the Flow Blurring (FB) fuel injection based on aerodynamically creating two-phase flow near the injector exit. The fuel tube and discharge orifice both of inside diameter D are separated by gap H. For H < 0.25D, the atomizing air bubbles into liquid fuel to create a two-phase flow near the tip of the fuel tube. Pressurized two-phase fuel-air mixture exits through the discharge orifice, which results in expansion and breakup of air bubbles yielding a spray with fine droplets. First, low-emission combustion of diesel, biodiesel and straight VO (soybean oil) was achieved by utilizing FB injector to yield fine sprays for these fuels with significantly different physical properties. Visual images for these baseline experiments conducted with heat release rate (HRR) of about 8 kW illustrate clean blue flames indicating premixed combustion for all three fuels. Radial profiles of the product gas temperature at the combustor exit overlap each other signifying that the combustion efficiency is independent of the fuel. At the combustor exit, the NOx emissions are within the measurement uncertainties, while CO emissions are slightly higher for straight VO as compared to diesel and biodiesel. Considering the large variations in physical and chemical properties of fuels considered, the small differences observed in CO and NOx emissions show promise for fuel-flexible, clean combustion systems. FB injector has proven to be very effective in atomizing fuels with very different physical properties, and it offers a

  3. Wah Fung Knitters Is Accredited China's Model Textile Enterprise for Energy Saving and Emissions Reduction Technology%Wah Fung Knitters Is Accredited China's Model Textile Enterprise for Energy Saving and Emissions Reduction Technology

    Institute of Scientific and Technical Information of China (English)

    2012-01-01

    Wah Fung Knitters, one of the leasers of utilizing new production technology and improving production facilities to promote energy saving and environment protection in the knitting, dyeing and finishing industry, has been accredited for China's Model Textile Enterprise for Energy Saving and Emissions Reduction Technology.

  4. Real-driving emissions of circulating Spanish car fleet in 2015 using RSD Technology.

    Science.gov (United States)

    Pujadas, M; Domínguez-Sáez, A; De la Fuente, J

    2017-01-15

    In this paper we present the results corresponding to on-road traffic emissions measurements obtained during two field campaigns developed in the Madrid region (Spain) during 2014 and 2015 in the framework of the CORETRA project. The experimental strategy was based on the use of a RSD 4600 remote sensor in interurban roads. These measurements have produced a global database of >190,000 vehicles with their associated emission data (NO/CO2, HC/CO2 and CO/CO2), which can be considered representative of the current Spanish circulating fleet. The results of M1 vehicles were analysed according to their distribution by Euro Standard and engine model. One of the relevant findings is that, despite the progressive introduction of increasingly stringent standards, no NO emission reduction is observed for diesel vehicles with time, although this behavior shows significative differences among brands and engine models. We have also investigated the presence of "high emitter" (HE) vehicles in the Spanish M1 circulating fleet and most of the HE detected corresponded to diesel vehicles with very high NO/CO2 values. With these results at hand, we strongly propose the future incorporation of the "high emitter vehicle" definition into the European environmental legislation, as well as the establishment of specific strategies in each country/region in order to identify these anomalous vehicles. Identification and repair of HE vehicles within the European circulating fleets, although are not easy tasks, should be considered very important for the improvement of air quality in the EU. The use of non-intrusive optical technologies (i.e. RSD) is an excellent option to provide instantaneous real emission data of each individual vehicle without disturbing traffic and for on-road fleet monitoring. In summary, it is a good strategy to obtain valuable information about the long term surveillance of real vehicle emission trends, specially after the introduction of new standard.

  5. Examination of the e{sup +} and e{sup +}e{sup -} pair emission from heavy ion collisions at the EPoS II spectrometer; Untersuchung der e{sup +}- und e{sup +}e{sup -}-Paaremission aus Schwerionenkollisionen mit dem EPoS II Spektrometer

    Energy Technology Data Exchange (ETDEWEB)

    Baumann, J.

    1996-12-01

    In the course of examination of the positron and positron-electron pair emission from heavy ion collisions at the Coulomb barrier, the research groups EPOS I and ORANGE have found a number of line structures in the measured positron energy and cumulative pair energy spectra which up to present could not be fully explained, as theoretical interpretations so far remain inconsistent in some respects. For clarification, further measurements have been made at the completely new designed EPoS II spectrometer. Reproducibility of the lines is possible at a high level of statistical significance. (orig./CB) [Deutsch] Bei Untersuchungen der Positron- und Positron- Elektron- Paaremissionaus Schwerionenkollisionen an der Coulombbarriere wurde von den Gruppen EPOS I und ORANGE eine Reihe von Linienstrukturen in den gemessenen Positronenenergie- und Paarsummenenergiespektren beobachtet, fuer die bislang keine in allen Punkten konsistente, theoretische Erklaerunggefunden werden konnte. Um ihre Ursachen zu klaeren, wurden mit dem voellig neu aufgebauten EPoS II Spektrometer weitere Messreihen durgefuehrt. Die Reproduzierbarkeit der Linien ist auf einem hohen statistischen Signifikanzniveau moeglich.

  6. Theoretical and experimental investigations of on-board control of combustion air and/or fuel for emission reduction in internal combustion engines. Final report; Durchfuehrung theoretischer und experimenteller Untersuchungen zu den Moeglichkeiten der On-Board-Beeinflussung der Verbrennungsluftzusammensetzung und/oder des Kraftstoffs fuer Verbrennungsmotoren mit dem Ziel der Emissionsminderung. Abschlussbericht

    Energy Technology Data Exchange (ETDEWEB)

    Velji, A.; Hofmann, U.

    2001-11-01

    Theoretical and experimental investigations were made in order to find the optimal composition of combustion air for simultaneous reduction of NOx and particulate emissions. The effect was found to be in the same order of magnitude as with exhaust recirculation. 'Optimized' air should have an oxygen content of more than 20 percent and a CO2 content of more than 10 percent, with nitrogen more or less accounting for the rest. [German] Ausgehend von der Abgasrueckfuehrung wurde in theoretischen und experimentellen Untersuchungen die optimale Zusammensetzung der Verbrennungsluft zur gleichzeitigen Reduktion der NO{sub x}- und Partikelemission ermittelt. Es konnte gezeigt werden, dass es mit dieser Verbrennungsluft moeglich ist, eine aehnlich hohe NO{sub x}-Reduktion wie bei der Abgasrueckfuehrung zu erzielen, ohne dass die Partikelemission drastisch ansteigt. Die 'optimale' Verbrennungsluft muss einen Sauerstoffgehalt groesser als 20% und einen CO{sub 2}-Gehalt groesser als 10% aufweisen. Der Rest besteht im Wesentlichen aus Stickstoff. (orig.)

  7. OPTIMIZING TECHNOLOGY TO REDUCE MERCURY AND ACID GAS EMISSIONS FROM ELECTRIC POWER PLANTS

    Energy Technology Data Exchange (ETDEWEB)

    Jeffrey C. Quick; David E. Tabet; Sharon Wakefield; Roger L. Bon

    2005-10-01

    Maps showing potential mercury, sulfur, chlorine, and moisture emissions for U.S. coal by county of origin were made from publicly available data (plates 1, 2, 3, and 4). Published equations that predict mercury capture by emission control technologies used at U.S. coal-fired utilities were applied to average coal quality values for 169 U.S. counties. The results were used to create five maps that show the influence of coal origin on mercury emissions from utility units with: (1) hot-side electrostatic precipitator (hESP), (2) cold-side electrostatic precipitator (cESP), (3) hot-side electrostatic precipitator with wet flue gas desulfurization (hESP/FGD), (4) cold-side electrostatic precipitator with wet flue gas desulfurization (cESP/FGD), and (5) spray-dry adsorption with fabric filter (SDA/FF) emission controls (plates 5, 6, 7, 8, and 9). Net (lower) coal heating values were calculated from measured coal Btu values, and estimated coal moisture and hydrogen values; the net heating values were used to derive mercury emission rates on an electric output basis (plate 10). Results indicate that selection of low-mercury coal is a good mercury control option for plants having hESP, cESP, or hESP/FGD emission controls. Chlorine content is more important for plants having cESP/FGD or SDA/FF controls; optimum mercury capture is indicated where chlorine is between 500 and 1000 ppm. Selection of low-sulfur coal should improve mercury capture where carbon in fly ash is used to reduce mercury emissions. Comparison of in-ground coal quality with the quality of commercially mined coal indicates that existing coal mining and coal washing practice results in a 25% reduction of mercury in U.S. coal before it is delivered to the power plant. Further pre-combustion mercury reductions may be possible, especially for coal from Texas, Ohio, parts of Pennsylvania and much of the western U.S.

  8. Laser cleaning of steam generator tubing based on acoustic emission technology

    Energy Technology Data Exchange (ETDEWEB)

    Hou, Su-xia; Luo, Ji-jun; Shen, Tao; Li, Ru-song [Xi' an Hi-Tech Institute, Xi' an (China)

    2015-12-15

    As a physical method, laser cleaning technology in equipment maintenance will be a good prospect. The experimental apparatus for laser cleaning of heat tubes in the steam generator was designed according to the results of theoretical analysis. There are two conclusions; one is that laser cleaning technology is attached importance to traditional methods. Which has advantages in saving on much manpower and material resource and it is a good cleaning method for heat tubes. The other is that the acoustic emission signal includes lots of information on the laser cleaning process, which can be used as real-time monitoring in laser cleaning processes. When the laser acts for 350 s, 100 % contaminants of heat tubes is cleaned off, and the sensor only receives weak AE signal at that time.

  9. Development and Application of a Life Cycle-Based Model to Evaluate Greenhouse Gas Emissions of Oil Sands Upgrading Technologies.

    Science.gov (United States)

    Pacheco, Diana M; Bergerson, Joule A; Alvarez-Majmutov, Anton; Chen, Jinwen; MacLean, Heather L

    2016-12-20

    A life cycle-based model, OSTUM (Oil Sands Technologies for Upgrading Model), which evaluates the energy intensity and greenhouse gas (GHG) emissions of current oil sands upgrading technologies, is developed. Upgrading converts oil sands bitumen into high quality synthetic crude oil (SCO), a refinery feedstock. OSTUM's novel attributes include the following: the breadth of technologies and upgrading operations options that can be analyzed, energy intensity and GHG emissions being estimated at the process unit level, it not being dependent on a proprietary process simulator, and use of publicly available data. OSTUM is applied to a hypothetical, but realistic, upgrading operation based on delayed coking, the most common upgrading technology, resulting in emissions of 328 kg CO2e/m(3) SCO. The primary contributor to upgrading emissions (45%) is the use of natural gas for hydrogen production through steam methane reforming, followed by the use of natural gas as fuel in the rest of the process units' heaters (39%). OSTUM's results are in agreement with those of a process simulation model developed by CanmetENERGY, other literature, and confidential data of a commercial upgrading operation. For the application of the model, emissions are found to be most sensitive to the amount of natural gas utilized as feedstock by the steam methane reformer. OSTUM is capable of evaluating the impact of different technologies, feedstock qualities, operating conditions, and fuel mixes on upgrading emissions, and its life cycle perspective allows easy incorporation of results into well-to-wheel analyses.

  10. A Modeled Carbon Emission Analysis Of Rampal Power Plant In Bangladesh And A Review Of Carbon Reduction Technologies

    Directory of Open Access Journals (Sweden)

    Gour Chand Mazumder

    2015-08-01

    Full Text Available todays most important concern of Bangladesh is power generation. Government has planned a 1320 MW coal-fired power station at Rampal near Sundarbans. Environmentalists have indicated that this plant will face environmental issues. So we tried finding the capability of Sundarbans to face carbon emissions. We figured out approximate carbon emission of that power plant using an arbitrary operational model. We found 3.16MKg of carbon emission daily. We used mangroves carbon sequestration rate to calculate the carbon tolerance level of Sundarbans and found approximately 4.2 MKg of carbon per day.The amount of emission we found here is marginal with the ability of Sundarbans as it is already contributing to sequester carbon from other sources. We studied and showed technology wise carbon reductions. It is possible to reduce 90 to 95 carbon emissioby using these technologies. We recommend these advanced technologies to ensure sundarbans environmental safety.

  11. The effects of deterioration and technological levels on pollutant emission factors for gasoline light-duty trucks.

    Science.gov (United States)

    Zhang, Qingyu; Fan, Juwang; Yang, Weidong; Chen, Bixin; Zhang, Lijuan; Liu, Jiaoyu; Wang, Jingling; Zhou, Chunyao; Chen, Xuan

    2017-07-01

    Vehicle deterioration and technological change influence emission factors (EFs). In this study, the impacts of vehicle deterioration and emission standards on EFs of regulated pollutants (carbon monoxide [CO], hydrocarbon [HC], and nitrogen oxides [NOx]) for gasoline light-duty trucks (LDTs) were investigated according to the inspection and maintenance (I/M) data using a chassis dynamometer method. Pollutant EFs for LDTs markedly varied with accumulated mileages and emission standards, and the trends of EFs are associated with accumulated mileages. In addition, the study also found that in most cases, the median EFs of CO, HC, and NOx are higher than those of basic EFs in the International Vehicle Emissions (IVE) model; therefore, the present study provides correction factors for the IVE model relative to the corresponding emission standards and mileages. Currently, vehicle emissions are great contributors to air pollution in cities, especially in developing countries. Emission factors play a key role in creating emission inventory and estimating emissions. Deterioration represented by vehicle age and accumulated mileage and changes of emission standards markedly influence emission factors. In addition, the results provide collection factors for implication in the IVE model in the region levels.

  12. MIT Lincoln Laboratory 2011 Facts

    Science.gov (United States)

    2011-01-01

    as offer- ing flexible work schedules, part-time employment, and telecommuting opportunities. Child Care The Technology Children’s Center facility...10,000 sq ft of class-100 cleanroom areas. The equipment set in this laboratory is continually updated and includes a production -class complementary metal...technology companies have evolved from the Laboratory’s technology development. These companies’ services and products range from multimedia software

  13. Greenhouse Gas and Particulate Emissions and Impacts from Cooking Technologies in Africa

    Science.gov (United States)

    Kammen, D. M.; Bailis, R.; Kituyi, E.; Ezzati, M.

    2003-12-01

    In much of Africa, the largest fraction of energy consumption occurs within the residential sector and is derived primarily from woodfuels burned in simple stoves with poor combustion characteristics. Many of the products of incomplete combustion (PICs) are damaging to human health, particularly when they are concentrated in poorly ventilated indoor environments. Incomplete combustion also has potentially harmful impacts on the climate. Prevalent PICs include methane, a potent greenhouse gas (GHG) that is among the pollutants subject to controls under the Kyoto Protocol as well as carbon monoxide (CO), non-methane hydrocarbons (NMHCs) and particulate matter (PM), which can all have an effect on climate, but are not subject to controls under Kyoto. In addition, when woodfuels are used at a rate that reduces standing stocks of trees over the medium or long term, the CO2 released by combustion also has an impact. The choice of stove and fuel technology can have a significant impact on the emission of GHGs as well as on human exposure to health damaging pollutants. In this paper we analyze the emissions of different household energy technologies on a life-cycle basis. We use emission factors to estimate the emissions associated with production, distribution and end-use of common household fuels and assess the likely impacts of these emissions on public health and the global environment. We focus largely on charcoal, a popular fuel in many sub-Saharan African countries. Charcoal is produced by heating wood in the absence of sufficient air for complete combustion to occur. This process removes moisture and most of the volatile compounds. The compounds driven off in the process consist of condensable tars as well as many gaseous hydrocarbons, including ~40 g CH4 per kg of charcoal produced. Combining upstream and end-use emissions, every meal cooked with charcoal has 2-10 times the global warming effect of cooking the same meal with firewood and 5-12 times the effect of

  14. Emerging biorefinery technologies for Indian forest industry to reduce GHG emissions.

    Science.gov (United States)

    Sharma, Naman; Nainwal, Shubham; Jain, Shivani; Jain, Siddharth

    2015-11-01

    The production of biofuels as alternative energy source over fossil fuels has gained immense interest over the years as it can contribute significantly to reduce the greenhouse gas (GHG) emissions from energy production and utilization. Also with rapidly increasing fuel price and fall in oil wells, the present scenario forces us to look for an alternative source of energy that will help us in the operation of industrial as well as the transportation sector. The pulp mills in India are one of the many options. The pulp mills in India can help us to produce bio-fuels by thermo-chemical/biochemical conversion of black liquor and wood residues. These technologies include extraction of hemi-cellulose from wooden chips and black liquor, lignin from black liquor, methanol from evaporator condensates, biogas production from waste sludge, syngas production from biomass using gasification and bio-oil production from biomass using pyrolysis. The objective of this paper is to overview these emerging bio-refinery technologies that can be implemented in Indian Forest Industry to get bio-fuels, bio-chemicals and bio-energy to reduce GHG emissions.

  15. Electron beam technology for multipollutant emissions control from heavy fuel oil-fired boiler.

    Science.gov (United States)

    Chmielewski, Andrzej G; Ostapczuk, Anna; Licki, Janusz

    2010-08-01

    The electron beam treatment technology for purification of exhaust gases from the burning of heavy fuel oil (HFO) mazout with sulfur content approximately 3 wt % was tested at the Institute of Nuclear Chemistry and Technology laboratory plant. The parametric study was conducted to determine the sulfur dioxide (SO2), oxides of nitrogen (NO(x)), and polycyclic aromatic hydrocarbon (PAH) removal efficiency as a function of temperature and humidity of irradiated gases, absorbed irradiation dose, and ammonia stoichiometry process parameters. In the test performed under optimal conditions with an irradiation dose of 12.4 kGy, simultaneous removal efficiencies of approximately 98% for SO2, and 80% for NO(x) were recorded. The simultaneous decrease of PAH and one-ringed aromatic hydrocarbon (benzene, toluene, and xylenes [BTX]) concentrations was observed in the irradiated flue gas. Overall removal efficiencies of approximately 42% for PAHs and 86% for BTXs were achieved with an irradiation dose 5.3 kGy. The decomposition ratio of these compounds increased with an increase of absorbed dose. The decrease of PAH and BTX concentrations was followed by the increase of oxygen-containing aromatic hydrocarbon concentrations. The PAH and BTX decomposition process was initialized through the reaction with hydroxyl radicals that formed in the electron beam irradiated flue gas. Their decomposition process is based on similar principles as the primary reaction concerning SO2 and NO(x) removal; that is, free radicals attack organic compound chains or rings, causing volatile organic compound decomposition. Thus, the electron beam flue gas treatment (EBFGT) technology ensures simultaneous removal of acid (SO2 and NO(x)) and organic (PAH and BTX) pollutants from flue gas emitted from burning of HFO. This technology is a multipollutant emission control technology that can be applied for treatment of flue gas emitted from coal-, lignite-, and HFO-fired boilers. Other thermal processes such

  16. Greenhouse Emission Reductions and Natural Gas Vehicles: A Resource Guide on Technology Options and Project Development

    Energy Technology Data Exchange (ETDEWEB)

    Orestes Anastasia; NAncy Checklick; Vivianne Couts; Julie Doherty; Jette Findsen; Laura Gehlin; Josh Radoff

    2002-09-01

    Accurate and verifiable emission reductions are a function of the degree of transparency and stringency of the protocols employed in documenting project- or program-associated emissions reductions. The purpose of this guide is to provide a background for law and policy makers, urban planners, and project developers working with the many Greenhouse Gas (GHG) emission reduction programs throughout the world to quantify and/or evaluate the GHG impacts of Natural Gas Vehicle (NGVs). In order to evaluate the GHG benefits and/or penalties of NGV projects, it is necessary to first gain a fundamental understanding of the technology employed and the operating characteristics of these vehicles, especially with regard to the manner in which they compare to similar conventional gasoline or diesel vehicles. Therefore, the first two sections of this paper explain the basic technology and functionality of NGVs, but focus on evaluating the models that are currently on the market with their similar conventional counterparts, including characteristics such as cost, performance, efficiency, environmental attributes, and range. Since the increased use of NGVs, along with Alternative Fuel Vehicle (AFVs) in general, represents a public good with many social benefits at the local, national, and global levels, NGVs often receive significant attention in the form of legislative and programmatic support. Some states mandate the use of NGVs, while others provide financial incentives to promote their procurement and use. Furthermore, Federal legislation in the form of tax incentives or procurement requirements can have a significant impact on the NGV market. In order to implement effective legislation or programs, it is vital to have an understanding of the different programs and activities that already exist so that a new project focusing on GHG emission reduction can successfully interact with and build on the experience and lessons learned of those that preceded it. Finally, most programs

  17. Untersuchungen an Eisen- und Lanthanoidhaltigen Koordinationsclustern mit Triazolat- sowie Semiquinonato-Liganden

    OpenAIRE

    Kriese, Thomas

    2016-01-01

    Magnetische Untersuchungen an Lanthanoiddimeren mit Semiquinonato-Liganden. Gemischtvalente Eisen-Koordinationsclustern. Lanthanoid-Koordinationscluster mit zwölf Lanthanoiden aber mit verschiedenen Clusterladungen.

  18. An innovative concept for mixed-material construction in vehicle design: self-piercing riveting of aluminium and steel in combination; Innovatives Konzept fuer Mischbauweisen im Fahrzeugbau: Stanznieten von Aluminium mit Stahl

    Energy Technology Data Exchange (ETDEWEB)

    Hahn, O.; Doelle, N. [Paderborn Univ. (Gesamthochschule) (Germany). Lab. fuer Werkstoff- und Fuegetechnik; Rahde, A. [Continental Gummi-Werke AG, Hannover (Germany)

    2001-02-01

    A 'mixed construction' with different materials whose properties have been optimised in combination and new construction and production technologies represent a solution for optimising light-weight construction in the manufacture of motor vehicles in relation to the reduction of waste gas emissions, improvement in acoustics, as well as a reduction in the consumption of fuel. (orig.) [German] Eine 'Mischbauweise' mit verschiedenen eigenschaftsoptimierten Werkstoffen im Verbund sowie neue Konstruktions- und Fertigungstechnologien stellen eine Loesung fuer den optimierten Leichtbau bei der Herstellung von Fahrzeugen im Hinblick auf die Reduzierung von Abgasemissionen, die Verbesserung der Akustik sowie die Reduzierung des Kraftstoffverbrauches dar. (orig.)

  19. Quantifying Fugitive Methane Emissions from Natural Gas Production with Mobile Technology

    Science.gov (United States)

    Tsai, T.; Rella, C.; Crosson, E.

    2013-12-01

    Quantification of fugitive methane (CH4) emissions to determine the environmental impact of natural gas production is challenging with current methods. We present a new mobile method known as the Plume Scanner that can quickly quantify CH4 emissions of point sources. The Plume Scanner is a direct measurement technique which utilizes a mobile Picarro cavity ring-down spectrometer and a gas sampling system based on AirCore technology [1]. As the Plume Scanner vehicle drives through the plume, the air is simultaneously sampled at four different heights, and therefore, the spatial CH4 distribution can be captured (Fig. 1). The flux of the plume is then determined by multiplying the spatial CH4 distribution data with the anemometer measurements. In this way, fugitive emission rates of highly localized sources such as natural gas production pads can be made quickly (~7 min). Verification with controlled CH4 releases demonstrate that under stable atmospheric conditions (Pasquill stability class is C or greater), the Plume Scanner measurements have an error of 2% and a repeatability of 15% [2]. Under unstable atmospheric conditions (Class A or B), the error is 6%, and the repeatability increases to 70% due to the variability of wind conditions. Over two weeks, 275 facilities in the Barnett Shale were surveyed from public roads by sampling the air for elevations in CH4 concentration, and 77% were found leaking. Emissions from 52 sites have been quantified with the Plume Scanner (Fig. 2), and the total emission is 4,900 liters per min (lpm) or 39,000 metric tons/yr CO2e. 1. Karion, A., C. Sweeney, P. Tans, and T. Newberger (2010), AirCore: An innovative atmospheric sampling system, J. Atmos. Oceanic Tech, 27, 1839-1853. 2. F. Pasquill (1961), The estimation of the dispersion of wind borne material, Meterol. Mag., 90(1063), 33-49 Figure 1. Plume Scanner Cartoon Figure 2. Distribution of methane fugitive emissions with error bars associated with the Pasquill stability classes

  20. Programmatic Need for a Zero Emission Steam Technology (ZEST) Research Facility

    Energy Technology Data Exchange (ETDEWEB)

    Meltzer, M; Followill, F; Johnson, J

    2001-06-30

    Lawrence Livermore National Laboratory (LLNL) is proposing to construct an on-site research facility for a novel electric power generation system that exploits clean-burning fossil fuels. This system, termed Zero Emission Steam Technology (ZEST), offers unique economic and environmental benefits, including: (1) Highly efficient power generation using the most advanced combustion and turbine technologies. (2) Ability to burn a range of fossil fuels, including natural gas, synthetic gas from coal (''coal syngas''), and coal-bed methane. (3) No oxides of nitrogen generated that would contribute to air pollution. (4) No greenhouse gases emitted. (5) Secure geologic sequestration of the carbon dioxide (CO{sub 2}) combustion product. (6) Use of the CO{sub 2} combustion product to enhance oil recovery in mature fields. The proposed research facility will provide a necessary step toward commercialization of ZEST. Despite the technology's promise, it will not be implemented by the U.S. electric power industry unless an agency such as DOE takes on the task of demonstrating its scientific and economic viability. The U.S. electric power industry typically requires 50,000 hours of operational data--nearly six years of continuous duty--before investing in a major new technology. Hence, there is a strong programmatic need for DOE to provide such data for ZEST, to accelerate commercial investment in this technology. The ZEST combustion process is based on rocket engine technology. It burns pure oxygen with a hydrocarbon fuel under stoichiometric conditions to produce power with virtually no oxides of nitrogen generated. The flexibility of ZEST's gas generator, which has independent temperature and pressure control, will allow modular upgrading of turbine systems as new, more efficient technology becomes available. It is envisioned that the ZEST research facility will serve as a testing laboratory for new turbine technology being designed by the U

  1. Minimally invasive thyroidectomy (MIT): indications and results.

    Science.gov (United States)

    Docimo, Giovanni; Salvatore Tolone, Salvatore; Gili, Simona; d'Alessandro, A; Casalino, G; Brusciano, L; Ruggiero, Roberto; Docimo, Ludovico

    2013-01-01

    To establish if the indication for different approaches for thyroidectomy and the incision length provided by means of pre-operative assessment of gland volume and size of nodules resulted in safe and effective outcomes and in any notable aesthetic or quality-of-life impact on patients. Ninehundred eightytwo consecutive patients, undergoing total thyroidectomy, were enrolled. The thyroid volume and maximal nodule diameter were measured by means of ultrasounds. Based on ultrasounds findings, patients were divided into three groups: minimally invasive video assisted thyroidectomy (MIVAT), minimally invasive thyroidectomy (MIT) and conventional thyroidectomy (CT) groups. The data concerning the following parameters were collected: operative time, postoperative complications, postoperative pain and cosmetic results. The MIVAT group included 179 patients, MIT group included 592 patients and CT group included 211 patients. Incidence of complications did not differ significantly in each group. In MIVAT and MIT group, the perception of postoperative pain was less intense than CT group. The patients in the MIVAT (7±1.5) and MIT (8±2) groups were more satisfied with the cosmetic results than those in CT group (5±1.3) (p= MIT is a technique totally reproducible, and easily convertible to perform surgical procedures in respect of the patient, without additional complications, increased costs, and with better aesthetic results.

  2. Calculation of emissions into rivers in Germany using the MONERIS model. Nutrients, heavy metals and polycyclic aromatic hydrocarbons; Berechnung von Stoffeintraegen in die Fliessgewaesser Deutschlands mit dem Modell MONERIS. Naehrstoffe, Schwermetalle und Polyzyklische aromatische Kohlenwasserstoffe

    Energy Technology Data Exchange (ETDEWEB)

    Fuchs, Stephan; Scherer, Ulrike; Wander, Ramona [Karlsruher Institut fuer Technologie, Karlsruhe (Germany). Inst. fuer Wasser und Gewaesserentwicklung; Behrendt, Horst; Venohr, Markus; Optiz, Dieter [Leibniz-Institut fuer Gewaesseroekologie und Binnenfischerei im Forschungsverbund Berlin e.V., Berlin (Germany); Hillenbrand, Thomas; Marscheider-Weidemann, Frank; Goetz, Thomas [Fraunhofer-Institut fuer System- und Innovationsforschung, Karlsruhe (Germany)

    2010-09-15

    The aim of both projects was a methodological development of the MONERIS model to quantify emissions from point and diffuse sources into Germany's surface waters. Both projects are based on consistent sub-basins and the according basic data as well as homogenous calculation algorithms that are adapted to the specifications of each substance group. The research encompasses Germany's large river basins as well as their catchment areas outside Germany and in total covers an area of 650,000 km{sup 2}. This was divided into 3456 analytical units (2759 of those in Germany), the average catchment areas being 190 km{sup 2} (135 km{sup 2} in Germany). All input data was collected and preprocessed with the highest spatial and temporal resolution possible based on the detailed topology. The modelling was performed in individual annual steps for the period between 1983-2005. For the evaluation of the temporal trends the data was aggregated for the periods 1983-1987 (''1985''), 1993-1997 (''1995''), 1998-2002 (''2000'') and 2003-2005 (''2005'') to soften the impact of hydrological influences. The basic data and model results for all sub-basins, years and substance groups of both projects were merged into one database. Additionally, a web-based graphical user interface was developed to visualise the emissions for any area aggregation can be visualised. The completion of both projects delivered for the first time ever homogenous instruments that can identify the most important sources and contamination hotspots for different relevant substance groups in larger river basins which can then serve as a basis for further analyses to achieve efficient measures to reduce pollution. (orig.)

  3. Trends in multi-pollutant emissions from a technology-linked inventory for India: I. Industry and transport sectors

    Science.gov (United States)

    Sadavarte, Pankaj; Venkataraman, Chandra

    2014-12-01

    Emissions estimation, for research and regulatory applications including reporting to international conventions, needs treatment of detailed technology divisions and high-emitting technologies. Here we estimate Indian emissions, for 1996-2015, of aerosol constituents (PM2.5, BC and OC) and precursor gas SO2, ozone precursors (CO, NOx, NMVOC and CH4) and greenhouse gases (CO2 and N2O), using a common fuel consumption database and consistent assumptions. Six source categories and 45 technologies/activities in the industry and transport sectors were used for estimating emissions for 2010. Mean emission factors, developed at the source-category level, were used with corresponding fuel consumption data, available for 1996-2011, projected to 2015. New activities were included to account for fugitive emissions of NMVOC from chemical and petrochemical industries. Dynamic emission factors, reflecting changes in technology-mix and emission regulations, were developed for thermal power plants and on-road transport vehicles. Modeled emission factors were used for gaseous pollutants for on-road vehicles. Emissions of 2.4 (0.6-7.5) Tg y-1 PM2.5, 0.23 (0.1-0.7) Tg y-1 BC, 0.15 (0.04-0.5) Tg y-1 OC, 7.3 (6-10) Tg y-1 SO2, 19 (7.5-33) Tg y-1 CO, 1.5 (0.1-9) Tg y-1 CH4, 4.3 (2-9) Tg y-1 NMVOC, 5.6 (1.7-15.9) Tg y-1 NOx, 1750 (1397-2231) Tg y-1 CO2 and 0.13 (0.05-0.3) Tg y-1 N2O were estimated for 2015. Significant emissions of aerosols and their precursors were from coal use in thermal power and industry (PM2.5 and SO2), and on-road diesel vehicles (BC), especially superemitters. Emissions of ozone precursors were largely from thermal power plants (NOx), on-road gasoline vehicles (CO and NMVOC) and fugitive emissions from mining (CH4). Highly uncertain default emission factors were the principal contributors to uncertainties in emission estimates, indicating the need for region specific measurements.

  4. Kompressionstherapie bei Patienten mit Ulcus cruris venosum.

    Science.gov (United States)

    Dissemond, Joachim; Assenheimer, Bernd; Bültemann, Anke; Gerber, Veronika; Gretener, Silvia; Kohler-von Siebenthal, Elisabeth; Koller, Sonja; Kröger, Knut; Kurz, Peter; Läuchli, Severin; Münter, Christian; Panfil, Eva-Maria; Probst, Sebastian; Protz, Kerstin; Riepe, Gunnar; Strohal, Robert; Traber, Jürg; Partsch, Hugo

    2016-11-01

    Wund-D.A.CH. ist der Dachverband deutschsprachiger Fachgesellschaften, die sich mit den Thematiken der Wundbehandlung beschäftigen. Experten verschiedener Fachgesellschaften aus Deutschland, Österreich und der Schweiz haben nun einen aktuellen Konsens der Kompressionstherapie für Patienten mit Ulcus cruris venosum erstellt. In Europa ist das Ulcus cruris venosum eine der häufigsten Ursachen für chronische Wunden. Neben der konservativen und interventionellen Wund- und Venentherapie, ist die Kompressionstherapie die Basis der Behandlungsstrategien. Die Kompressionstherapie kann heute mit sehr unterschiedlichen Materialien und Systemen durchgeführt werden. Während in der Entstauungsphase insbesondere Verbände mit Kurzzugbinden oder Mehrkomponentensysteme zur Anwendung kommen, sind es anschließend überwiegend Ulkus-Strumpfsysteme. Eine weitere, bislang wenig verbreitete Alternative sind adaptive Kompressionsbandagen. Insbesondere für die Rezidivprophylaxe werden medizinische Kompressionsstrümpfe empfohlen. Durch die Vielzahl der heute zur Verfügung stehenden Behandlungsoptionen, kann für nahezu alle Patienten ein Konzept entwickelt werden, dass sich an den individuellen Bedürfnissen und Fähigkeiten orientiert und daher auch akzeptiert und durchgeführt wird. Die Kompressionstherapie ist für die Behandlung von Patienten mit Ulcus cruris venosum essentiell. In den letzten Jahren sind viele verschiedene Therapieoptionen verfügbar, die in den deutschsprachigen Ländern unterschiedlich angewendet oder durchgeführt werden. Daher soll dieser Expertenkonsens dazu beitragen, konkrete Empfehlungen für die praktische Durchführung der Kompressionstherapie von Patienten mit Ulcus cruris venosum darzustellen. © 2016 Deutsche Dermatologische Gesellschaft (DDG). Published by John Wiley & Sons Ltd.

  5. Is Optical Gas Imaging Effective for Detecting Fugitive Methane Emissions? - A Technological and Policy Perspective

    Science.gov (United States)

    Ravikumar, A. P.; Wang, J.; Brandt, A. R.

    2016-12-01

    Mitigating fugitive methane emissions from the oil and gas industry has become an important concern for both businesses and regulators. While recent studies have improved our understanding of emissions from all sectors of the natural gas supply chain, cost-effectively identifying leaks over expansive natural gas infrastructure remains a significant challenge. Recently, the Environmental Protection Agency (EPA) has recommended the use of optical gas imaging (OGI) technologies to be used in industry-wide leak detection and repair (LDAR) programs. However, there has been little to no systematic study of the effectiveness of infrared-camera-based OGI technology for leak detection applications. Here, we develop a physics-based model that simulates a passive infrared camera imaging a methane leak against varying background and ambient conditions. We verify the simulation tool through a series of large-volume controlled release field experiments wherein known quantities of methane were released and imaged from a range of distances. After simulator verification, we analyze the effects of environmental conditions like temperature, wind, and imaging background on the amount of methane detected from a statistically representative survey program. We also examine the effects of LDAR design parameters like imaging distance, leak size distribution, and gas composition. We show that imaging distance strongly affects leak detection - EPA's expectation of a 60% reduction in fugitive emissions based on a semi-annual LDAR survey will be realized only if leaks are imaged at a distance less than 10 m from the source under ideal environmental conditions. Local wind speed is also shown to be important. We show that minimum detection limits are 3 to 4 times higher for wet-gas compositions that contain a significant fraction of ethane and propane, resulting a significantly large leakage rate. We also explore the importance of `super-emitters' on the performance of an OGI-based leak

  6. GlasKon `99 - 7th Innovation Forum for Glass, Architecture, and Technology from January 18 to 23, 1999; GlasKon `99: 7. Innovations-Forum Glas, Architektur, Technik - Kongress und Ausstellung in Verbindung mit der Bau `99; GlasKon `99 - 7th Innovation Forum for Glass, Architecture, and Technology from January 18 to 23, 1999

    Energy Technology Data Exchange (ETDEWEB)

    Krewinkel, H.W.; Seger, P.E.; Achenbach, J. [comps.

    1999-10-01

    Thanks to its basic properties, i.e. transparency, weather resistance, and easy recyclability, glass is very well suited as a ``solar radiation-trapping`` building material. This congress and exhibition report presents, amongst other things, a solar glass of variable light and energy transmission, possibilities of passivsolar energy recovery in non-transparent facades, glazing for intelligent daylight utilisation, and innovative facades with photovoltaics. Four contributions have been abstracted individually for the Energy Database. [Deutsch] Der Baustoff Glas mit seinen grundlegenden Eigenschaften - Transparenz, Wetterbestaendigkeit sowie problemlose Recyclebarkeit dient auch als `` solare Strahlenfalle``. Im Folgenden werden ein Sonnenschutzglas mit veraenderbarer Licht-und Energietransmission, Moeglichkeiten der passiven solaren Energiegewinnung im nicht-transparentern Fassadenbereich, Verglasungen fuer die intelligente Tageslichtnutzung sowie innovative Fassaden mit Photovoltaik vorgestellt. Fuer die Datenbank Energy wurden vier Beitraege einzeln aufgenommen.

  7. How Much Have They Retained? Making Unseen Concepts Seen in a Freshman Electromagnetism Course at MIT

    Science.gov (United States)

    Dori, Yehudit Judy; Hult, Erin; Breslow, Lori; Belcher, John W.

    2007-01-01

    The introductory freshmen electromagnetism course at MIT has been taught since 2000 using a studio physics format entitled TEAL--Technology Enabled Active Learning. TEAL has created a collaborative, hands-on environment where students carry out desktop experiments, submit web-based assignments, and have access to a host of visualizations and…

  8. Emerging Energy-efficiency and CO{sub 2} Emission-reduction Technologies for Cement and Concrete Production

    Energy Technology Data Exchange (ETDEWEB)

    Hasanbeigi, Ali; Price, Lynn; Lin, Elina

    2012-04-06

    Globally, the cement industry accounts for approximately 5 percent of current anthropogenic carbon dioxide (CO{sub 2}) emissions. World cement demand and production are increasing significantly, leading to an increase in this industry's absolute energy use and CO{sub 2} emissions. Development of new energy-efficiency and CO{sub 2} emission-reduction technologies and their deployment in the market will be key for the cement industry's mid- and long-term climate change mitigation strategies. This report is an initial effort to compile available information on process description, energy savings, environmental and other benefits, costs, commercialization status, and references for emerging technologies to reduce the cement industry's energy use and CO{sub 2} emissions. Although studies from around the world identify a variety of sector-specific and cross-cutting energy-efficiency technologies for the cement industry that have already been commercialized, information is scarce and/or scattered regarding emerging or advanced energy-efficiency and low-carbon technologies that are not yet commercialized. This report consolidates available information on nineteen emerging technologies for the cement industry, with the goal of providing engineers, researchers, investors, cement companies, policy makers, and other interested parties with easy access to a well-structured database of information on these technologies.

  9. How Well Do We Know the Future of CO2 Emissions? Projecting Fleet Emissions from Light Duty Vehicle Technology Drivers.

    Science.gov (United States)

    Martin, Niall P D; Bishop, Justin D K; Boies, Adam M

    2017-03-07

    While the UK has committed to reduce CO2 emissions to 80% of 1990 levels by 2050, transport accounts for nearly a fourth of all emissions and the degree to which decarbonization can occur is highly uncertain. We present a new methodology using vehicle and powertrain parameters within a Bayesian framework to determine the impact of engineering vehicle improvements on fuel consumption and CO2 emissions. Our results show how design changes in vehicle parameters (e.g., mass, engine size, and compression ratio) result in fuel consumption improvements from a fleet-wide mean of 5.6 L/100 km in 2014 to 3.0 L/100 km by 2030. The change in vehicle efficiency coupled with increases in vehicle numbers and fleet-wide activity result in a total fleet-wide reduction of 41 ± 10% in 2030, relative to 2012. Concerted internal combustion engine improvements result in a 48 ± 10% reduction of CO2 emissions, while efforts to increase the number of diesel vehicles within the fleet had little additional effect. Increasing plug-in and all-electric vehicles reduced CO2 emissions by less (42 ± 10% reduction) than concerted internal combustion engines improvements. However, if the grid decarbonizes, electric vehicles reduce emissions by 45 ± 9% with further reduction potential to 2050.

  10. Fuel Savings and Emission Reductions from Next-Generation Mobile Air Conditioning Technology in India

    Energy Technology Data Exchange (ETDEWEB)

    Chaney, L.; Thundiyil, K.; Andersen, S.; Chidambaram, S.; Abbi, Y. P.

    2007-01-01

    Up to 19.4% of vehicle fuel consumption in India is devoted to air conditioning (A/C). Indian A/C fuel consumption is almost four times the fuel penalty in the United States and close to six times that in the European Union because India's temperature and humidity are higher and because road congestion forces vehicles to operate inefficiently. Car A/C efficiency in India is an issue worthy of national attention considering the rate of increase of A/C penetration into the new car market, India's hot climatic conditions and high fuel costs. Car A/C systems originally posed an ozone layer depletion concern. Now that industrialized and many developing countries have moved away from ozone-depleting substances per Montreal Protocol obligations, car A/C impact on climate has captured the attention of policy makers and corporate leaders. Car A/C systems have a climate impact from potent global warming potential gas emissions and from fuel used to power the car A/Cs. This paper focuses on car A/C fuel consumption in the context of the rapidly expanding Indian car market and how new technological improvements can result in significant fuel savings and consequently, emission reductions. A 19.4% fuel penalty is associated with A/C use in the typical Indian passenger car. Car A/C fuel use and associated tailpipe emissions are strong functions of vehicle design, vehicle use, and climate conditions. Several techniques: reducing thermal load, improving vehicle design, improving occupants thermal comfort design, improving equipment, educating consumers on impacts of driver behaviour on MAC fuel use, and others - can lead to reduced A/C fuel consumption.

  11. Development of coal mine methane concentration technology for reduction of greenhouse gas emissions

    Institute of Scientific and Technical Information of China (English)

    Takahisa; UTAKI

    2010-01-01

    In coal mines in such countries as China and Russia,most of the coal mine methane(CMM) generated during mining is emitted to the atmosphere without any effective usage,because the methane concentration of CMM is relatively low and not allowed to be used as fuel for safety reasons.Methane is one of the greenhouse gases.Therefore,if it becomes possible to concentrate CMM to an acceptable level for use as fuel,this will greatly contribute to reduction of greenhouse gas emissions.With the aim of gaining approval as a greenhouse gas emission reduction of the clean development mechanism(CDM) or joint implementation(JI) project,we developed a CMM concentration system to apply the vacuum pressure swing adsorption(VPSA) technology using a high methane-selective adsorbent by Osaka Gas Co.,Ltd.The pilot-scale plant of a CMM concentration system was installed in a coal mine in Fuxin City in the northeastern China and a demonstration test was commenced in December 2008.As the result,the pilot-scale plant successfully concentrated the raw material gas with a methane concentration of 21% and a flow rate of 1000 Nm3/h to 48%,which exceeded the target of the methane concentration performance(a 25% increase).The methane recovery rate reached 93%.

  12. Genomic insights into growth and survival of supercritical-CO2 tolerant bacterium MIT0214 under conditions associated with geologic carbon dioxide sequestration

    Science.gov (United States)

    Peet, K. C.; Freedman, A. J.; Hernandez, H.; Thompson, J. R.

    2011-12-01

    Carbon capture and storage (CCS) of CO2 has the potential to significantly reduce the emissions of greenhouse gasses associated with fossil fuel combustion. The largest potential for storing captured CO2 in the United Sates is in deep geologic saline formations. Currently, little is known about the effects of CO2 storage on biologically active microbial communities found in the deep earth biosphere. Therefore, to investigate how deep earth microbial communities will be affected by the storage of CO2 we have enriched for a microbial consortium from the saline formation waters of the Frio 2 project site (Texas Gulf Coast) that is capable of growth in nutrient media under a supercritical CO2 headspace (Hernandez, et al). The cultivation of actively growing cells in an environment containing scCO2 is unexpected based on previous experimental evidence of microbial sterilization attributed to the acidic, desiccating, and solvent-like properties of scCO2. We have isolated strain MIT0214 from this supercritical CO2 based enrichment and have sequenced its genome using the Illumina platform followed by de novo assembly of reads and targeted Sanger sequencing to reduce gaps in the draft assembly. The genome of strain MIT0214 is approximately 5,551,062 base pairs with 35% GC-content and is most similar to nonpathogenic Bacillus cereus strain ATCC 14597. Annotation of the draft assembly of the MIT0214 genome by the Rapid Annotation using Subsystem Technology (RAST) server revealed 5538 coding sequences where 4145 of the coding sequences were assigned putative functions. These functions were enriched in cell wall and capsule formation, phage/prophage and plasmids, gene regulation and signaling, and nitrogen and sulfur metabolism relative to the genome of the most closely-related surface-isolated B. cereus reference (ATCC 14597) and in total 773,416 bp of the MIT0214 genome content was distinct from the B. cereus reference. Notably, this set of distinct sequences were most

  13. Grosse Axiallager mit Hybridschmierung - Theoretische und experimentelle Betrachtungen

    DEFF Research Database (Denmark)

    Santos, Ilmar; Fuerst, Axel

    2003-01-01

    Der vorliegende Artikel praesentiert die Simulation eines grossen axialen Kippsegmentlagers unter Beruecksichtigung der hybriden Schmierung, d.h. gleichzeitige hydrodynamische und hydrostatische Schmierung. Ein Vergleich mit Messungen zeigt, dass fuer das betrachtete Lager mit 2,2 m Durchmesser d...

  14. Technology priorities for transport in Asia: assessment of economy-wide CO2 emissions reduction for Lebanon

    DEFF Research Database (Denmark)

    Dhar, Subash; Marpaung, Charles O. P.

    2015-01-01

    mitigations actions (NAMA) given their strong contribution for development and therefore a methodology based on in-put out-put decomposition analysis is proposed for analysing economy wide CO2 emissions reductions. The methodology has been applied for the transport sector of Lebanon where alternative fuels......,improvement to cars (private and taxis) and buses for public transport were prioritized by stakeholders. The economy-wide CO2 emission reduce by 2,269 thousand tons by 2020 if the prioritized technologies are implemented in Lebanon. Fuel mix effect and structural effect would reduce CO2 emission by 2,611 thousand...

  15. Technology priorities for transport in Asia: assessment of economy-wide CO2 emissions reduction for Lebanon

    DEFF Research Database (Denmark)

    Dhar, Subash; Marpaung, Charles O. P.

    2015-01-01

    This paper analyses the technology choices of countries that prioritized transport as a sector in Asia under the Technology Needs Assessment project. The countries used a wide variety of criteria to prioritize technologies which were related to the benefits technologies would provide, costs...... mitigations actions (NAMA) given their strong contribution for development and therefore a methodology based on in-put out-put decomposition analysis is proposed for analysing economy wide CO2 emissions reductions. The methodology has been applied for the transport sector of Lebanon where alternative fuels...

  16. Emission control measures for precursors of tropospheric ozone. Pt. 1 and 2; Emissionsminderungsmoeglichkeiten bei Vorlaeufersubstanzen von bodennahem Ozon. Bd. 1: Systemanalyse der Ozonminderungsmassnahmen in den USA. Bd. 2: Luftreinhaltemassnahmen in den USA zur Minderung von VOC-Emissionen aus Kleinanlagen und Produkten und Vergleich mit europaeischen Regelungen

    Energy Technology Data Exchange (ETDEWEB)

    Leclaire, T.; Schiefer, C.; Bergmann, S.; Hrabovski, Z. [Institut fuer Umwelttechnologie und Umweltanalytik e.V. (IUTA), Duisburg (Germany)

    1998-08-01

    emissions are compared and discussed. Advantages and disadvantages of the described strategies are highlighted. Based on the actual VOC emission inventory of Germany suggestions for future reduction measures are supposed. (orig.) [Deutsch] In den USA liegen Erfahrungen aus der Ozonbekaempfung ueber einen Zeitraum von 20 bis 30 Jahren vor. Aufgrund besonders hoher Ozonbelastungen in vielen Regionen werden grosse Anstrengungen zur VOC-Minderung unternommen. Wesentliches Ziel des Vorhabens war es, die Schwerpunkt im Hinblick auf die Minderung von VOC-Emissionen herauzufinden und zu pruefen, ob und inwieweit eine Uebertragung von Strategien und Massnahmen auf die Verhaeltnisse in Deutschland moeglich ist. Hauptaugenmerk wurde auf kleinere Anlagen und Produkte gelegt, weil in diesen Bereichen in Deutschland momentan vordringlich Handlungsbedarf gesehen wird. Im ersten Band sind die Strategien und Massnahmen zur Ozonminderung in den USA (bundesweit) sowie in fuenf Regionen mit besonders hoher Ozonimmissionsbelastung beschrieben. Hierzu erfolgte eine Darstellung der Zustaendigkeitsbereiche auf nationaler, einzelstaatlicher, regionaler und lokaler Ebene, der Gesetzgebung und Regelwerke, der Schwerpunktsetzung hinsichtlich NO{sub x}- und VOC-Minderung und eine kurze Darstellung der quellenbezogenen Massnahmen auf nationaler Ebene und in den betrachteten Regionen. In Band 2 erfolgt eine ausfuehrliche Beschreibung der Massnahmen zur VOC-Emissionsminderung bei Produkten und im gewerblichen Bereich in den USA anhand der nationalen Regelungen fuer Anstrichstoffe und Konsumgueter, der von der kalifornischen Luftreinhaltebehoerde erlassenen VOC-bezogenen Regelungen fuer Anstrichstoffe, Konsumgueter und Gewerbebetriebe sowie der Regelungen des suedkalifornischen South Coast Air Quality Management Districts (Los Angeles und Umgebung). Zur Darstellung der regionalen Bestimmung wurde diese Region ausgewaehlt, da die Regelungen dort aufgrund der besonders hohen Immissionsbelastung

  17. Emission control measures for precursors of tropospheric ozone. Pt. 1 and 2; Emissionsminderungsmoeglichkeiten bei Vorlaeufersubstanzen von bodennahem Ozon. Bd. 1: Systemanalyse der Ozonminderungsmassnahmen in den USA. Bd. 2: Luftreinhaltemassnahmen in den USA zur Minderung von VOC-Emissionen aus Kleinanlagen und Produkten und Vergleich mit europaeischen Regelungen

    Energy Technology Data Exchange (ETDEWEB)

    Leclaire, T.; Schiefer, C.; Bergmann, S.; Hrabovski, Z. [Institut fuer Umwelttechnologie und Umweltanalytik e.V. (IUTA), Duisburg (Germany)

    1998-08-01

    emissions are compared and discussed. Advantages and disadvantages of the described strategies are highlighted. Based on the actual VOC emission inventory of Germany suggestions for future reduction measures are supposed. (orig.) [Deutsch] In den USA liegen Erfahrungen aus der Ozonbekaempfung ueber einen Zeitraum von 20 bis 30 Jahren vor. Aufgrund besonders hoher Ozonbelastungen in vielen Regionen werden grosse Anstrengungen zur VOC-Minderung unternommen. Wesentliches Ziel des Vorhabens war es, die Schwerpunkt im Hinblick auf die Minderung von VOC-Emissionen herauzufinden und zu pruefen, ob und inwieweit eine Uebertragung von Strategien und Massnahmen auf die Verhaeltnisse in Deutschland moeglich ist. Hauptaugenmerk wurde auf kleinere Anlagen und Produkte gelegt, weil in diesen Bereichen in Deutschland momentan vordringlich Handlungsbedarf gesehen wird. Im ersten Band sind die Strategien und Massnahmen zur Ozonminderung in den USA (bundesweit) sowie in fuenf Regionen mit besonders hoher Ozonimmissionsbelastung beschrieben. Hierzu erfolgte eine Darstellung der Zustaendigkeitsbereiche auf nationaler, einzelstaatlicher, regionaler und lokaler Ebene, der Gesetzgebung und Regelwerke, der Schwerpunktsetzung hinsichtlich NO{sub x}- und VOC-Minderung und eine kurze Darstellung der quellenbezogenen Massnahmen auf nationaler Ebene und in den betrachteten Regionen. In Band 2 erfolgt eine ausfuehrliche Beschreibung der Massnahmen zur VOC-Emissionsminderung bei Produkten und im gewerblichen Bereich in den USA anhand der nationalen Regelungen fuer Anstrichstoffe und Konsumgueter, der von der kalifornischen Luftreinhaltebehoerde erlassenen VOC-bezogenen Regelungen fuer Anstrichstoffe, Konsumgueter und Gewerbebetriebe sowie der Regelungen des suedkalifornischen South Coast Air Quality Management Districts (Los Angeles und Umgebung). Zur Darstellung der regionalen Bestimmung wurde diese Region ausgewaehlt, da die Regelungen dort aufgrund der besonders hohen Immissionsbelastung

  18. Deeskalation der Immuntherapie bei Patienten mit Multipler Sklerose

    OpenAIRE

    2016-01-01

    Die vorliegende Arbeit ist die erste, die sich mit der Frage beschäftigt, mit welcher zur Deeskalation eingesetzten Therapie nach Beendigung einer Eskalationstherapie mit Mitoxantron am besten Krankheitsstabilität erreicht werden kann bzw. ob Patienten-/Krankheitscharakteristika existieren, die eine bestimmte Nachfolge-Therapie favorisieren. Trotz neuer Behandlungsmöglichkeiten der hochaktiven MS mit Fingolimod, Natalizumab und Alemtuzumab hat Mitoxantron im klinischen Alltag nach wie vor ...

  19. Particle reduction strategies - PAREST. Evaluation of emission reduction scenarios using chemical transport calculations. PM10- and PM2.5-reduction potentials by package of measures for further immission reduction in Germany. Sub-report.; Strategien zur Verminderung der Feinstaubbelastung - PAREST. Bewertung von Emissionsminderungsszenarien mit Hilfe chemischer Transportberechnungen. PM10- und PM2,5-Minderungspotenziale von Massnahmenpaketen zur weiteren Reduzierung der Immissionen in Deutschland. Teilbericht

    Energy Technology Data Exchange (ETDEWEB)

    Stern, Rainer [Freie Univ. Berlin (Germany). Inst. fuer Meteorologie, Troposphaerische Umweltforschung

    2013-06-15

    This report documents the effects of additional emission control measures the PM10 and PM2.5 air quality in Germany (PM = particulate matter). The immission effects of the planned measures were calculated with the Chemistry-Aerosol-Transport Model REM CALGRID (RCG). [German] Dieser Bericht dokumentiert die Auswirkungen zusaetzlicher emissionsmindernder Massnahmen auf die PM10 und PM2.5-Luftqualitaet in Deutschland. Die immissionsseitigen Auswirkungen der geplanten Massnahmen wurden auf der Basis von Berechnungen mit dem Chemie-Aerosol-Transportmodell REM-CALGRID (RCG) bestimmt. Grundlage der Szenarienrechnungen sind die im Rahmen des F and E-Vorhabens entwickelten Emissionsabschaetzungen, die die Aenderung der Emissionen aufgrund von technischen oder nicht-technischen Massnahmen beschreiben. Die den Berechnungen zugrunde liegende horizontale Aufloesung betraegt 0.125 Laenge und 0.0625 Breite oder circa 7 km x 8 km. Das meteorologische Referenzjahr ist 2005.

  20. Particle Reduction Strategies - PAREST. Evaluation of emission reduction scenarios using chemical transport calculations. NO{sub 2}- and O{sub 3} reduction potentials of package of measures for further reduction of immissions in Germany; Strategien zur Verminderung der Feinstaubbelastung - PAREST. Bewertung von Emissionsminderungsszenarien mit Hilfe chemischer Transportberechnungen. NO{sub 2}- und O{sub 3}-Minderungspotenziale von Massnahmenpaketen zur weiteren Reduzierung der Immissionen in Deutschland. Teilbericht

    Energy Technology Data Exchange (ETDEWEB)

    Stern, Rainer [Freie Univ. Berlin (Germany). Inst. fuer Meteorologie, Troposphaerische Umweltforschung

    2013-06-15

    This report documents the effects of additional emission control measures the NO{sub 2}- and ozone-air quality in Germany (PM = particulate matter). The immission effects of the planned measures were calculated with the Chemistry-Aerosol-Transport Model REM CALGRID (RCG). [German] Dieser Bericht dokumentiert die Auswirkungen zusaetzlicher emissionsmindernder Massnahmen auf die NO{sub 2}- und die Ozon-Luftqualitaet in Deutschland. Die immissionsseitigen Auswirkungen der geplanten Massnahmen wurden auf der Basis von Berechnungen mit dem Chemie- Aerosol-Transportmodell REM-CALGRID (RCG) bestimmt. Grundlage der Szenarienrechnungen sind die im Rahmen des F and E-Vorhabens entwickelten Emissionsabschaetzungen, die die Aenderung der Emissionen aufgrund von technischen oder nicht-technischen Massnahmen beschreiben. Die den Berechnungen zugrunde liegende horizontale Aufloesung betraegt 0.125 Laenge und 0.0625 Breite oder circa 7 km x 8 km. Das meteorologische Referenzjahr ist 2005.

  1. Negative Emissions Technologies, the Paris Agreement, and the Need for a Human-Rights Based Approach

    Science.gov (United States)

    Burns, W. C. G.

    2016-12-01

    The new Paris Agreement under the United Nations Framework Convention on Climate Change contemplates that its prospective Parties will balance emissions and sinks by 2050 as a means to effectuate the goal of holding temperature increases to well below 2°C from pre-industrial levels, as well as the more aspirational goal of holding temperature increases to 1.5°C. Most of the IPCC's AR5 scenarios that achieve these objectives contemplate the large-scale deployment of so-called "negative emissions technologies," with an emphasis on bioenergy and carbon capture and storage (BECCS), and to a lesser degree afforestation. BECCS could assuredly help society avoid passing critical climatic thresholds, or address overshoot scenarios in this century and beyond. However, it could also profound implications for food production, the status of forests, access to lands for livelihoods by vulnerable populations, and the integrity of critical ecosystems. This, in turn could have serious ramifications for human rights of some of the world's most vulnerable populations, including the rights to food, water, livelihoods and the benefits of biodiversity. The Preamble to the Paris Agreement acknowledges the need to take into consideration the potential impact of responses to climate change, providing that "Parties should, when taking action to address climate change, respect, promote and consider their respective obligations on human rights." This presentation will outline how application of a human rights-based approach to assessing such options could help to reconcile the objectives of ameliorating potential climatic impacts while protecting the human rights of potentially affected individuals and groups. This will include the potential role of Human Rights Impacts Assessments and potential configuration of HRIAs at the national and international level. It will also briefly suggest how to operationalize this approach within the Paris Agreement framework, including institutional

  2. MIT professor wins major international math prize

    CERN Multimedia

    Allen, S

    2004-01-01

    Mathematicians Isadore Singer of MIT and Sir Michael Francis Atiyah of the University of Edinburgh will share an $875,000 award as winners of the second Abel Prize, which some hope will come to be seen as a Nobel Prize for math.

  3. Mit Kindergartenkindern Medientechnologien ergründen

    DEFF Research Database (Denmark)

    Chimirri, Niklas Alexander

    2012-01-01

    Erklärungen für die Kind-Technik-Interaktion. Der Beitrag bezieht in einem Kindergarten erhobenes Datenmaterial ein, um das Konzept der alltäglichen Lebensführung für eine subjektwissenschaftliche Technikforschung mit Kindern fruchtbar zu machen. Die hier vorgeschlagene Erweiterung betont die Relevanz einer...

  4. Editorial 3/2015: Handeln mit Symbolen

    Directory of Open Access Journals (Sweden)

    Alessandro Barberi

    2015-09-01

    Full Text Available Die paradigmatische Unterscheidung zwischen Sozial- und Kulturwissenschaften, die spätestens seit den 1980er Jahren eingehend diskutiert wurde, lässt sich anhand des Bereichs des Symbolischen auf den Punkt bringen: Ist das Symbolische nur ein Effekt von sozialen, ökonomischen oder medialen Strukturen einer gegebenen Gesellschaft oder reproduzieren sich Strukturen nur durch die symbolischen Handlungen der AkteurInnen innerhalb einer gegebenen Kultur? So hatte etwa der klassische "harte" Strukturalismus bei Claude Lévi-Strauss, Jacques Lacan und dem frühen Michel Foucault symbolische Ordnungen (und d. i. hier die Sprache als eine unbewusst determinierende Voraussetzung von menschlicher Interaktion begriffen, woraufhin mit dem Post- bzw. Neostrukturalismus die Rückkehr der individuellen Äußerung, der parole, des speech acts (und d. i. hier das Sprechen, also der symbolischen Handlung in den Mittelpunkt rückte. Medienpädagogisch ist diese Unterscheidung gerade dann von Interesse, wenn es darum geht, wie Lehrende und Lernende sich zueinander verhalten, interagieren und dabei eben mit Symbolen handeln. Insofern ist es bemerkenswert, dass – fast parallel zu Foucaults Unterscheidung von diskursiven und nicht-diskursiven Praktiken – auch Dieter Baacke 1973 von diskursiven und nicht-diskursiven Symbolen gesprochen hat. Denn – wie auch im Rahmen des "Symbolischen Interaktionismus" von George Herbert Mead argumentiert wurde – können Symbole nur im Rahmen einer gegebenen Diskursökonomie von AkteurInnen diskursiv ausgetauscht werden und konstituieren dabei Erfahrungen bzw. Wahrnehmungen und somit auch die soziale bzw. kulturelle Wirklichkeit. Insofern ist die Frage nach dem Symbolischen immer auch eine Frage nach den Möglichkeiten der Handlungstheorie (im Sinne Jürgen Habermas’ bzw. der Praxeologie (im Sinne Pierre Bourdieus. Die Redaktion der MEDIENIMPULSE geht in diesem Zusammenhang theoretisch und praktisch von Entscheidungsimpulse

  5. Low background high efficiency radiocesium detection system based on positron emission tomography technology

    Science.gov (United States)

    Yamamoto, Seiichi; Ogata, Yoshimune

    2013-09-01

    After the 2011 nuclear power plant accident at Fukushima, radiocesium contamination in food became a serious concern in Japan. However, low background and high efficiency radiocesium detectors are expensive and huge, including semiconductor germanium detectors. To solve this problem, we developed a radiocesium detector by employing positron emission tomography (PET) technology. Because 134Cs emits two gamma photons (795 and 605 keV) within 5 ps, they can selectively be measured with coincidence. Such major environmental gamma photons as 40K (1.46 MeV) are single photon emitters and a coincidence measurement reduces the detection limit of radiocesium detectors. We arranged eight sets of Bi4Ge3O12 (BGO) scintillation detectors in double rings (four for each ring) and measured the coincidence between these detectors using PET data acquisition system. A 50 × 50 × 30 mm BGO was optically coupled to a 2 in. square photomultiplier tube (PMT). By measuring the coincidence, we eliminated most single gamma photons from the energy distribution and only detected those from 134Cs at an average efficiency of 12%. The minimum detectable concentration of the system for the 100 s acquisition time is less than half of the food monitor requirements in Japan (25 Bq/kg). These results show that the developed radiocesium detector based on PET technology is promising to detect low level radiocesium.

  6. Low background high efficiency radiocesium detection system based on positron emission tomography technology

    Energy Technology Data Exchange (ETDEWEB)

    Yamamoto, Seiichi; Ogata, Yoshimune [Department of Radiological and Medical Laboratory Sciences, Nagoya University Graduate School of Medicine, 1-1-20 Daiko-Minami, Higashi-ku, Nagoya 461-8673 (Japan)

    2013-09-15

    After the 2011 nuclear power plant accident at Fukushima, radiocesium contamination in food became a serious concern in Japan. However, low background and high efficiency radiocesium detectors are expensive and huge, including semiconductor germanium detectors. To solve this problem, we developed a radiocesium detector by employing positron emission tomography (PET) technology. Because {sup 134}Cs emits two gamma photons (795 and 605 keV) within 5 ps, they can selectively be measured with coincidence. Such major environmental gamma photons as {sup 40}K (1.46 MeV) are single photon emitters and a coincidence measurement reduces the detection limit of radiocesium detectors. We arranged eight sets of Bi{sub 4}Ge{sub 3}O{sub 12} (BGO) scintillation detectors in double rings (four for each ring) and measured the coincidence between these detectors using PET data acquisition system. A 50 × 50 × 30 mm BGO was optically coupled to a 2 in. square photomultiplier tube (PMT). By measuring the coincidence, we eliminated most single gamma photons from the energy distribution and only detected those from {sup 134}Cs at an average efficiency of 12%. The minimum detectable concentration of the system for the 100 s acquisition time is less than half of the food monitor requirements in Japan (25 Bq/kg). These results show that the developed radiocesium detector based on PET technology is promising to detect low level radiocesium.

  7. Cost-efficient emission abatement of energy and transportation technologies: mitigation costs and policy impacts for Belgium

    OpenAIRE

    De Schepper, Ellen; Van Passel, Steven; Lizin, Sebastien; Wouter M. J. Achten; Van Acker, Karel

    2014-01-01

    In the light of global warming, this paper develops a framework to compare energy and transportation technologies in terms of cost-efficient GHG emission reduction. We conduct a simultaneous assessment of economic and environmental performances through life cycle costing and life cycle assessment. To calculate the GHG mitigation cost, we create reference systems within the base scenario. Further, we extend the concept of the mitigation cost, allowing (i) comparision of technologies given a li...

  8. Cost-efficient emission abatement of energy and transportation technologies: Mitigation costs and policy impacts for Belgium

    OpenAIRE

    Ellen De Schepper; Steven Van Passel; Sebastien Lizin; Wouter Achten; Karel Van Acker

    2014-01-01

    In the light of global warming, this paper develops a framework to compare energy and transportation technologies in terms of cost-efficient GHG emission reduction. We conduct a simultaneous assessment of economic and environmental performances through life cycle costing and life cycle assessment. To calculate the GHG mitigation cost, we create reference systems within the base scenario. Further, we extend the concept of the mitigation cost, allowing (i) comparision of technologies given a li...

  9. Behandlung von Herzrhythmusstörungen mit Magnesium bei Patienten mit Herzinsuffizienz

    Directory of Open Access Journals (Sweden)

    Wink K

    2002-01-01

    Full Text Available Die medikamentöse Behandlung von Herzrhythmusstörungen ist unbefriedigend, da bei guter Wirksamkeit durch die Proarrhythmie eine Verbesserung der Prognose gefährdet und nicht gesichert ist. Man kann davon ausgehen, daß Magnesiumsalze keine arrhythmogene Effekte aufweisen. Bei Patienten mit einer Herzinsuffizienz besteht häufig ein Mg-Mangel, der durch gastrointestinale Störungen, neurohormonale Regulationen, aber auch durch die Therapie (Diuretika,Digitalisbedingt ist. An Patienten mit einer Herzinsuffizienz müßte sich demnach zeigen lassen, ob die Mg-Substitution einen antiarrhythmischen Effekt aufweist. In fünf placebokontrollierten Studien konnte gezeigt werden, daß sich teil weise signifikant und mit ausreichen der Aussagekraft (PowerArrhythmien bei Patienten mit Herzinsuffizienz durch orale und parenterale Gabe von Mg-Salzen reduzieren lassen. Trotz Einschränkungen wie z.B. inadäquates Design, fehlende Vermeidung von Bias, ungenügende Vergleichbarkeit der Behandlungsgruppen, inadäquate Auswertung und ungenügende Berücksichtigung der Spontanvariation läßt sich aufgrund der Ergebnisse der Studien die Hypothese aufstellen, daß Magnesiumsalze bei Patienten mit Herzinsuffizienz Herzrhythmusstörungen günstig beeinflussen können. Prospektive, randomisierte,verblindete und kontrollierte konfirmatorische Studien mit ausreichenden Fallzahlen sind jedoch notwendig, um diese Hypothese zu bestätigen.

  10. Broadcasting studios Radio Bremen becomes residence rehabilitation clinic. Energy efficient retrofitting with economic building services technology; Funkhaus Radio Bremen wird Residenz Reha-Klinik. Energieeffiziente Sanierung mit wirtschaftlicher Gebaeudetechnik

    Energy Technology Data Exchange (ETDEWEB)

    Hinz, Thomas [Siemens AG, Bremen (Germany). Building Technologies Div.

    2012-07-01

    Hardly any building project is as sustainable as the rededication of a building. A recent example: The former site of Radio Bremen in the district Schwachhausen with approximately 10,000 square meters of studios, production facilities and offices were committed to the residence rehabilitation clinic with 200 beds and 100 outpatient rehab places. In order to support the economic efficiency of this measure, the existing infrastructure of the heating technology, ventilation technology and air conditioning technology was adopted and modernized.

  11. Emerging Energy-efficiency and Carbon Dioxide Emissions-reduction Technologies for the Iron and Steel Industry

    Energy Technology Data Exchange (ETDEWEB)

    Hasanbeigi, Ali [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Energy Analysis and Environmental Impacts Dept.. China Energy Group; Price, Lynn [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Energy Analysis and Environmental Impacts Dept.. China Energy Group; Arens, Marlene [Fraunhofer Inst. for Systems and Innovation Research (ISI), Karlsruhe (Germany)

    2013-01-31

    Iron and steel manufacturing is among the most energy-intensive industries and accounts for the largest share, approximately 27 percent, of global carbon dioxide (CO2) emissions from the manufacturing sector. The ongoing increase in world steel demand means that this industry’s energy use and CO2 emissions continue to grow, so there is significant incentive to develop, commercialize and adopt emerging energy-efficiency and CO2 emissions-reduction technologies for steel production. Although studies from around the world have identified a wide range of energy-efficiency technologies applicable to the steel industry that have already been commercialized, information is limited and/or scattered regarding emerging or advanced energy-efficiency and low-carbon technologies that are not yet commercialized. This report consolidates available information on 56 emerging iron and steel industry technologies, with the intent of providing a well-structured database of information on these technologies for engineers, researchers, investors, steel companies, policy makers, and other interested parties. For each technology included, we provide information on energy savings and environmental and other benefits, costs, and commercialization status; we also identify references for more information.

  12. The potential of natural gas as a bridging technology in low-emission road transportation in Germany

    Directory of Open Access Journals (Sweden)

    Wang-Helmreich Hanna

    2012-01-01

    Full Text Available Greenhouse gas emission reductions are at the centre of national and international efforts to mitigate climate change. In road transportation, many politically incentivised measures focus on increasing the energy efficiency of established technologies, or promoting electric or hybrid vehicles. The abatement potential of the former approach is limited, electric mobility technologies are not yet market-ready. In a case study for Germany, this paper focuses on natural gas powered vehicles as a bridging technology in road transportation. Scenario analyses with a low level of aggregation show that natural gas-based road transportation in Germany can accumulate up to 464 million tonnes of CO2-equivalent emission reductions until 2030 depending on the speed of the diffusion process. If similar policies were adopted EU-wide, the emission reduction potential could reach a maximum of about 2.5 billion tonnes of CO2-equivalent. Efforts to promote natural gas as a bridging technology may therefore contribute to significant emissions reductions.

  13. Effect of electricity tariffs and cooling technologies on dairy farm electricity consumption, related costs and greenhouse gas emissions

    NARCIS (Netherlands)

    Upton, J.R.; Shalloo, L.; Murphy, M.; Groot Koerkamp, P.W.G.; Boer, de I.J.M.

    2014-01-01

    The aim of this study was to provide insight into the variations in dairy farm electricity costs across five electricity tariffs. The effect of four milk cooling scenarios is also simulated to illustrate the effect of technologies on the electricity consumption, related costs and CO2 emissions of a

  14. Effect of electricity tariffs and cooling technologies on dairy farm electricity consumption, related costs and greenhouse gas emissions

    NARCIS (Netherlands)

    Upton, J.R.; Shalloo, L.; Murphy, M.; Groot Koerkamp, P.W.G.; Boer, de I.J.M.

    2014-01-01

    The aim of this study was to provide insight into the variations in dairy farm electricity costs across five electricity tariffs. The effect of four milk cooling scenarios is also simulated to illustrate the effect of technologies on the electricity consumption, related costs and CO2 emissions of a

  15. Optimization and reconstruction technology of SCR flue gas denitrification ultra low emission in coal fired power plant

    Science.gov (United States)

    Li, Xinhao

    2017-09-01

    In recent decades, nitrogen oxides (NOx) emissions from thermal power plant increased year by year in China. A large number of nitrogen oxides (NOx) emissions caused by the growing environmental problems have been widely attached importance to people. SCR denitrification technology has the advantages of cleanliness and high efficiency. At present, it has been the major technology to control NOx emission because of its high denitrification efficiency, reliable operation, no by-products and simple structure of the device. The denitrification efficiency can be stabilized at 70%. In this paper, three different denitrification methods are compared. The factors influencing the denitrification efficiency, the system arrangement and the key factors of the denitrification system are discussed in detail. And the numerical simulation of how to use this calculation software in the SCR reactor flue, baffle, reactor, spray ammonia grille and spray ammonia, mixer, etc. are reviewed, as well as the effect of system operation control on the deoxidation performance.

  16. Technology demonstration for reducing mercury emissions from small-scale gold refining facilities.

    Energy Technology Data Exchange (ETDEWEB)

    Habegger, L. J.; Fernandez, L. E.; Engle, M.; Bailey, J. L.; Peterson, D. P.; MacDonell, M. M.; U.S. Environmental Protection Agency

    2008-06-30

    Gold that is brought from artisanal and small-scale gold mining areas to gold shops for processing and sale typically contains 5-40% mercury. The uncontrolled removal of the residual mercury in gold shops by using high-temperature evaporation can be a significant source of mercury emissions in urban areas where the shops are located. Emissions from gold shop hoods during a burn can exceed 1,000 mg/m{sup 3}. Because the saturation concentration of mercury vapor at operating temperatures at the hood exhaust is less than 100 mg/m{sup 3}, the dominant component of the exhaust is in the form of aerosol or liquid particles. The U.S. Environmental Protection Agency (EPA), with technical support from Argonne National Laboratory (Argonne), has completed a project to design and test a technology to remove the dominant aerosol component in the emissions from gold shops. The objective was to demonstrate a technology that could be manufactured at low cost and by using locally available materials and manufacturing capabilities. Six prototypes designed by Argonne were locally manufactured, installed, and tested in gold shops in Itaituba and Creporizao, Brazil. The initial prototype design incorporated a pebble bed as the media for collecting the mercury aerosols, and a mercury collection efficiency of over 90% was demonstrated. Though achieving high efficiencies, the initial prototype was determined to have practical disadvantages such as excessive weight, a somewhat complex construction, and high costs (>US$1,000). To further simplify the construction, operation, and associated costs, a second prototype design was developed in which the pebble bed was replaced with slotted steel baffle plates. The system was designed to have flexibility for installation in various hood configurations. The second prototype with the baffle plate design was installed and tested in several different hood/exhaust systems to determine the optimal installation configuration. The significance of

  17. Technology demonstration for reducing mercury emissions from small-scale gold refining facilities.

    Energy Technology Data Exchange (ETDEWEB)

    Habegger, L. J.; Fernandez, L. E.; Engle, M.; Bailey, J. L.; Peterson, D. P.; MacDonell, M. M.; U.S. Environmental Protection Agency

    2008-06-30

    Gold that is brought from artisanal and small-scale gold mining areas to gold shops for processing and sale typically contains 5-40% mercury. The uncontrolled removal of the residual mercury in gold shops by using high-temperature evaporation can be a significant source of mercury emissions in urban areas where the shops are located. Emissions from gold shop hoods during a burn can exceed 1,000 mg/m{sup 3}. Because the saturation concentration of mercury vapor at operating temperatures at the hood exhaust is less than 100 mg/m{sup 3}, the dominant component of the exhaust is in the form of aerosol or liquid particles. The U.S. Environmental Protection Agency (EPA), with technical support from Argonne National Laboratory (Argonne), has completed a project to design and test a technology to remove the dominant aerosol component in the emissions from gold shops. The objective was to demonstrate a technology that could be manufactured at low cost and by using locally available materials and manufacturing capabilities. Six prototypes designed by Argonne were locally manufactured, installed, and tested in gold shops in Itaituba and Creporizao, Brazil. The initial prototype design incorporated a pebble bed as the media for collecting the mercury aerosols, and a mercury collection efficiency of over 90% was demonstrated. Though achieving high efficiencies, the initial prototype was determined to have practical disadvantages such as excessive weight, a somewhat complex construction, and high costs (>US$1,000). To further simplify the construction, operation, and associated costs, a second prototype design was developed in which the pebble bed was replaced with slotted steel baffle plates. The system was designed to have flexibility for installation in various hood configurations. The second prototype with the baffle plate design was installed and tested in several different hood/exhaust systems to determine the optimal installation configuration. The significance of

  18. Estimating CO{sub 2} Emission Reduction of Non-capture CO{sub 2} Utilization (NCCU) Technology

    Energy Technology Data Exchange (ETDEWEB)

    Lee, Ji Hyun; Lee, Dong Woog; Gyu, Jang Se; Kwak, No-Sang; Lee, In Young; Jang, Kyung Ryoung; Shim, Jae-Goo [KEPCO Research Institute, Daejon (Korea, Republic of); Choi, Jong Shin [Korea East-West Power Co., LTD(ETP), Ulsan (Korea, Republic of)

    2015-10-15

    Estimating potential of CO{sub 2} emission reduction of non-capture CO{sub 2} utilization (NCCU) technology was evaluated. NCCU is sodium bicarbonate production technology through the carbonation reaction of CO{sub 2} contained in the flue gas. For the estimating the CO{sub 2} emission reduction, process simulation using process simulator (PRO/II) based on a chemical plant which could handle CO{sub 2} of 100 tons per day was performed, Also for the estimation of the indirect CO{sub 2} reduction, the solvay process which is a conventional technology for the production of sodium carbonate/sodium bicarbonate, was studied. The results of the analysis showed that in case of the solvay process, overall CO{sub 2} emission was estimated as 48,862 ton per year based on the energy consumption for the production of NaHCO{sub 3} (7.4 GJ/tNaHCO{sub 3}). While for the NCCU technology, the direct CO{sub 2} reduction through the CO{sub 2} carbonation was estimated as 36,500 ton per year and the indirect CO{sub 2} reduction through the lower energy consumption was 46,885 ton per year which lead to 83,385 ton per year in total. From these results, it could be concluded that sodium bicarbonate production technology through the carbonation reaction of CO{sub 2} contained in the flue was energy efficient and could be one of the promising technology for the low CO{sub 2} emission technology.

  19. Ultra-High Efficiency and Low-Emissions Combustion Technology for Manufacturing Industries

    Energy Technology Data Exchange (ETDEWEB)

    Atreya, Arvind

    2013-04-15

    The purpose of this research was to develop and test a transformational combustion technology for high temperature furnaces to reduce the energy intensity and carbon footprint of U.S. manufacturing industries such as steel, aluminum, glass, metal casting, and petroleum refining. A new technology based on internal and/or external Flue Gas Recirculation (FGR) along with significant enhancement in flame radiation was developed. It produces "Radiative Flameless Combustion (RFC)" and offers tremendous energy efficiency and pollutant reduction benefits over and above the now popular "flameless combustion." It will reduce the energy intensity (or fuel consumption per unit system output) by more than 50% and double the furnace productivity while significantly reducing pollutants and greenhouse gas emissions (10^3 times reduction in NOx and 10 times reduction in CO & hydrocarbons and 3 times reduction in CO2). Product quality improvements are also expected due to uniform radiation, as well as, reduction in scale/dross formation is expected because of non-oxidative atmosphere. RFC is inexpensive, easy to implement, and it was successfully tested in a laboratory-scale furnace at the University of Michigan during the course of this work. A first-ever theory with gas and particulate radiation was also developed. Numerical programs were also written to design an industrial-scale furnace. Nine papers were published (or are in the process of publication). We believe that this early stage research adequately proves the concept through laboratory experiments, modeling and computational models. All this work is presented in the published papers. Important conclusions of this work are: (1) It was proved through experimental measurements that RFC is not only feasible but a very beneficial technology. (2) Theoretical analysis of RFC was done in (a) spatially uniform strain field and (b) a planar momentum jet where the strain rate is neither prescribed nor uniform. Four important non

  20. Urban Form and Greenhouse Gas Emissions: Findings, Strategies, and Design Decision Support Technologies

    Directory of Open Access Journals (Sweden)

    Michael West Mehaffy

    2015-11-01

    Full Text Available The research reported in this dissertation contains three complementary and overlapping parts:One, “findings”: It assesses the factors of urban morphology that contribute to increased rates of greenhouse gas emissions per capita, and the ways they interact. It finds a significant but underrepresented set of factors, distinct from but relating the factors at the individual building scale and the scale of regional transportation systems.Two, “strategies”: It assesses the methodologies by which such findings might be put to use in identifying and achieving reductions through changes in urban design, and proposes new strategies to do so using innovative forms of design decision support tools.Three, “design decision support tools”: It then proposes a specific new technology, namely a new class of open-source scenario-modelling tool, embodied in new prototype software. The tool utilizes a new kind of “federated” web-based wiki technology incorporating design pattern languages, which was developed in collaboration with the software engineer and wiki inventor Ward Cunningham.As part of this research, it has been necessary to examine fundamental methodological questions, and to account for limitations of current data as well as current significant gaps in research. In the process, this research has made a modest contribution to the state of knowledge about additional research needed.For me, this work has also highlighted the need for urgent and effective reforms to current “business as usual” practices. The need is all the more urgent given unprecedented rates of urbanisation – much of it sprawling and resource-inefficient – taking place in many parts of the world today.

  1. Hamlet er manden i mit liv

    DEFF Research Database (Denmark)

    Rösing, Lilian Munk

    2009-01-01

    Hamlet er manden i mit liv. Min elskede. Jeg har en drøm om at frelse ham. At redde ham ud af sin mors soveværelse og ind i mit. Væk fra det ødipale Helvede han befinder sig i, fastlåst mellem et svin af en faderskikkelse (Claudius) og en alt for idealiseret far (gamle Hamlet), vågende over sin...... jeg bare skrige tilbage at han var en håbløs lille Ødipus, og så kunne vi skændes inderligt og forsones ømt. Hamlet er min elskede. Og derfor græder jeg trøstesløst hver gang han dør, hver gang han hengiver sig til det store gruppeorgie af en mordscene hjemme hos mor og far, i stedet for at holde...

  2. Modernization of heating systems. System solutions by renewabel heat in residnetial buildings. Consultant package; Heizungsmodernisierung. Systemloesungen mit erneuerbarer Waerme in Wohngebaeuden. Beratungspaket

    Energy Technology Data Exchange (ETDEWEB)

    Hartmann, F.

    2008-07-01

    Energy conservation measures in the area of buildings can considerably contribute to the planned reduction of CO{sub 2} emissions particularly if they are not only carried out in the field of new buildings but also in existing buildings. In this booklet technical possibilities and bases of constructional thermal insulation in modern construction engineering are described in detail. In this connection the following subjects are gone into: Low-energy houses, bases of heat and humidity technology, correct heating and ventilating, thermal insulation of heating systems and water heaters, renewable energy sources, legal obligations like energy passport, support possibilities, energy diagnosis and counselling. (GL) [German] Das Beratungspaket Heizungsmodernisierung wird Sie bei der Beratung und Kundeninformation rund um die Modernisierung von Heizungsanlagen unterstuetzen. Ansprechende Grafiken erleichtern die Orientierung in den technischen Details und geben Einblick in die Komplexitaet der Heizungsmodernisierung mit Hilfe regenerativer Energietechnik. Die Komponenten eines modernen, zeitgemaessen Heizsystems werden ebenso behandelt wie Investitionskosten, Betriebskosten und staatliche Foerderung. Von allgemeinen Informationen zur Waermeerzeugung fuer Heizung und Warmwasser bis hin zu wirtschaftlichen Alternativen durch Sonnenwaerme, Waermepumpen oder Heiztechnik mit Holz finden Sie alles, was der Kunde ueber moderne Heizsysteme fuer den Bestand wissen moechte. Auf der beiligenden CD-ROM finden Sie anschauliche Praesentationsgrafiken sowie Checklisten, die Sie zur Vorbereitung und im Kundengespraech nutzen oder Ihrem Kunden als Informationsmaterial ueberreichen koennen. (orig./GL)

  3. Use of modern and clean coal technologies for reduction of greenhouse gas emissions

    Energy Technology Data Exchange (ETDEWEB)

    Anca Popescu; George Lavrov; Diana Costea [Institute of Power Studies, Bucharest (Romania)

    2003-07-01

    The article reviews the status of CO{sub 2} taxes and other environmental taxes in the European Union. It concludes that the economic impacts of the CO{sub 2} tax are likely to be small but positive and if tax revenues were utilized for implementing measures to reduce energy use and introduce renewables and cogeneration, CO{sub 2} emission could be reduced much further. Reasons are given for a CO{sub 2}/energy tax in Central and Eastern Europe. The effect of a CO{sub 2} tax on the expansion plan of capacities for electricity generation in Romania is explored under different scenarios. It is concluded that in the period 2002 to 2020 combined cycle gas turbines and nuclear power are the preferred means of power generation but after 2010 coal would be favoured (because of the escalation of natural gas prices and the taxes). In these conditions more efficient technologies should be employed, using domestic lignite resources. A series of 12 PowerPoint slides are included. 9 refs., 2 figs., 2 tabs.

  4. Effects of After-Treatment Control Technologies on Heavy-Duty Diesel Truck Emissions

    Science.gov (United States)

    Preble, C.; Dallmann, T. R.; Kreisberg, N. M.; Hering, S. V.; Harley, R.; Kirchstetter, T.

    2015-12-01

    Diesel engines are major emitters of nitrogen oxides (NOx) and the black carbon (BC) fraction of particulate matter (PM). Diesel particle filter (DPF) and selective catalytic reduction (SCR) emission control systems that target exhaust PM and NOx have recently become standard on new heavy-duty diesel trucks (HDDT). There is concern that DPFs may increase ultrafine particle (UFP) and total particle number (PN) emissions while reducing PM mass emissions. Also, the deliberate catalytic oxidation of engine-out NO to NO2 in continuously regenerating DPFs may lead to increased tailpipe emission of NO2 and near-roadway concentrations that exceed the 1-hr national ambient air quality standard. Increased NO2 emissions can also promote formation of ozone and secondary PM. We report results from ongoing on-road studies of HDDT emissions at the Port of Oakland and the Caldecott Tunnel in California's San Francisco Bay Area. Emission factors (g pollutant per kg diesel) were linked via recorded license plates to each truck's engine model year and installed emission controls. At both sites, DPF use significantly increased the NO2/NOx emission ratio. DPFs also significantly increased NO2 emissions when installed as retrofits on older trucks with higher baseline NOx emissions. While SCR systems on new trucks effectively reduce total NOx emissions and mitigate these undesirable DPF-related NO2 emissions, they also lead to significant emission of N2O, a potent greenhouse gas. When expressed on a CO2-equivalent basis, the N2O emissions increase offsets the fuel economy gain (i.e., the CO2 emission reduction) associated with SCR use. At the Port, average NOx, BC and PN emission factors from new trucks equipped with DPF and SCR were 69 ± 15%, 92 ± 32% and 66 ± 35% lower, respectively, than modern trucks without these emission controls. In contrast, at the Tunnel, PN emissions from older trucks retrofit with DPFs were ~2 times greater than modern trucks without DPFs. The difference

  5. MIT Lincoln Laboratory Annual Report 2014

    Science.gov (United States)

    2014-01-01

    Key Partners; Life member, MIT Corporation; Former member, President’s Foreign Intelligence Advisory Board VADM David E. Frost , USN (Ret...President, Frost & Associates, Inc.; Former Deputy Commander, U.S. Space Command Dr. Arthur Gelb President, Four Sigma Corporation; Former Chairman and...Stenbit Former Assistant Secretary of Defense (C3I); Former Executive Vice President, TRW GEN Gordon R. Sullivan , USA (Ret) President of the

  6. Integrierte Produktions- und Distributionsplanung mit Routingentscheidungen

    OpenAIRE

    Wendt, Rolf

    2016-01-01

    Die zentrale Problemstellung dieser Arbeit entstammt dem operationellen Supply Chain Management. Es liegen Bestellungen von Kunden vor, für die jeweils zu entscheiden ist, ob sie angenommen werden sollen. Die angenommenen Bestellungen sind auf einem vorhandenen Maschinenpark zu produzieren und fertiggestellte Bestellungen sind an den jeweiligen Kunden auszuliefern. Zu diesem Zwecke steht eine Transporterflotte bereit, wobei die Auslieferung in der Form "Sammelauslieferung mit Rundreise" erfol...

  7. Grundlegende Steuerungsverfahren im heterogenen Logistiknetz mit Kanban

    Science.gov (United States)

    Dickmann, Eva; Dickmann, Philipp; Lödding, Hermann; Möller, Niklas; Rücker, Thomas; Schneider, Herfried M.; Zäh, Michael F.

    In vielen Unternehmen werden heterogene (verschiedene) Steuerungen in einem abgestimmten Konzept kombiniert. Je nach Anwendungsfall und Rahmenbedingungen werden Kombinationen allgemein bekannter Steuerungen oder Steuerungsvarianten gemischt eingesetzt, um eine optimale Steuerung für unterschiedliche Fälle zu erreichen. Hierbei stehen neben den bekannten und weit verbreiteten Methoden, wie Material Requirements Planning (MRP) oder Kanban, auch weniger bekannte oder neue Methoden zur Auswahl, wie die Produktionssteuerung mit dezentraler, bestandsorientierter Fertigungsregelung (DBF). Kanban ist ein simples und effizientes Steuerungskonzept, das in der klassischen Form für spezifische einfache Anwendungsfälle umsetzbar ist. Hochentwickelte Steuerungsalgorithmen können helfen, komplexe Abläufe optimal abzubilden. Mit einer grundlegenden Vereinfachung der Abläufe kann allerdings in vielen Fällen ein wesentlich stärkerer und umfassender Verbesserungseffekt erzielt werden. Die wesentliche Fragestellung sollte folglich lauten: Warum ist der Ablauf nicht mit einer einfachen Steuerung wie Kanban abzubilden? Um die Vorteile des Konzepts auch in untypischen Bereichen anwenden zu können, sind jedoch verschiedene Varianten oder Kanban-ähnliche Steuerungsmethoden entstanden. Darüber hinaus sind in der Praxis hybride Steuerungen im Einsatz, welche so kombiniert werden, dass die Zusammensetzung anspruchsvolle Eigenschaftsbilder noch exakt abbildet. In der Praxis basieren die Steuerungsentscheidungen nur zu einem kleinen Teil auf den eigentlichen Steuerungsalgorithmen, wie sie uns das MRP-System zur Verfügung stellt. Moderne Steuerungswelten" schließen alle relevanten Informationsquellen in eine heterogene Entscheidungsmatrix mit ein. Letztlich zählt nicht, ob die Entscheidung auf den Informationen aus dem MRP-System oder auf Softfacts basierend getroffen wurde, sondern nur, ob die Entscheidung erfolgreich war.

  8. The combustion of biomass - the impact of its types and combustion technologies on the emission of nitrogen oxide

    Directory of Open Access Journals (Sweden)

    Mladenović Milica R.

    2016-01-01

    Full Text Available Harmonization of environmental protection and the growing energy needs of modern society promote the biomass application as a replacement for fossil fuels and a viable option to mitigate the green house gas emissions. For domestic conditions this is particularly important as more than 60% of renewables belongs to biomass. Beside numerous benefits of using biomass for energy purposes, there are certain drawbacks, one of which is a possible high emission of NOx during the combustion of these fuels. The paper presents the results of the experiments with multiple biomass types (soybean straw, cornstalk, grain biomass, sunflower oil, glycerin and paper sludge, using different combustion technologies (fluidized bed and cigarette combustion, with emphasis on the emission of NOx in the exhaust gas. A presentation of the experimental installations is given, as well as an evaluation of the effects of the fuel composition, combustion regimes and technology on the NOx emissions. As the biomass combustion took place at temperatures low enough that thermal and prompt NOx can be neglected, the conclusion is the emissions of nitrogen oxides primarily depend on the biomass composition- it is increasing with the increase of the nitrogen content, and decreases with the increase of the char content which provides catalytic surface for NOx reduction by CO. [Projekat Ministarstva nauke Republike Srbije, br. TR33042: Improvement of the industrial fluidized bed facility, in scope of technology for energy efficient and environmentally feasible combustion of various waste materials in fluidized bed i br. III42011: Development and improvement of technologies for efficient use of energy of several forms of agricultural and forest biomass in an environmentally friendly manner, with the possibility of cogeneration

  9. Institute a modest carbon tax to reduce carbon emissions, finance clean energy technology development, cut taxes, and reduce the deficit

    Energy Technology Data Exchange (ETDEWEB)

    Muro, Mark; Rothwell, Jonathan

    2012-11-15

    The nation should institute a modest carbon tax in order to help clean up the economy and stabilize the nation’s finances. Specifically, Congress and the president should implement a $20 per ton, steadily increasing carbon excise fee that would discourage carbon dioxide emissions while shifting taxation onto pollution, financing energy efficiency (EE) and clean technology development, and providing opportunities to cut taxes or reduce the deficit. The net effect of these policies would be to curb harmful carbon emissions, improve the nation’s balance sheet, and stimulate job-creation and economic renewal.

  10. The MIT Integrated Global System Model: A facility for Assessing and Communicating Climate Change Uncertainty (Invited)

    Science.gov (United States)

    Prinn, R. G.

    2013-12-01

    The world is facing major challenges that create tensions between human development and environmental sustenance. In facing these challenges, computer models are invaluable tools for addressing the need for probabilistic approaches to forecasting. To illustrate this, I use the MIT Integrated Global System Model framework (IGSM; http://globalchange.mit.edu ). The IGSM consists of a set of coupled sub-models of global economic and technological development and resultant emissions, and physical, dynamical and chemical processes in the atmosphere, land, ocean and ecosystems (natural and managed). Some of the sub-models have both complex and simplified versions available, with the choice of which version to use being guided by the questions being addressed. Some sub-models (e.g.urban air pollution) are reduced forms of complex ones created by probabilistic collocation with polynomial chaos bases. Given the significant uncertainties in the model components, it is highly desirable that forecasts be probabilistic. We achieve this by running 400-member ensembles (Latin hypercube sampling) with different choices for key uncertain variables and processes within the human and natural system model components (pdfs of inputs estimated by model-observation comparisons, literature surveys, or expert elicitation). The IGSM has recently been used for probabilistic forecasts of climate, each using 400-member ensembles: one ensemble assumes no explicit climate mitigation policy and others assume increasingly stringent policies involving stabilization of greenhouse gases at various levels. These forecasts indicate clearly that the greatest effect of these policies is to lower the probability of extreme changes. The value of such probability analyses for policy decision-making lies in their ability to compare relative (not just absolute) risks of various policies, which are less affected by the earth system model uncertainties. Given the uncertainties in forecasts, it is also clear that

  11. Final Report on Testing of Off-Gas Treatment Technologies for Abatement of Atmospheric Emissions of Chlorinated Volatile Organic Compounds

    Energy Technology Data Exchange (ETDEWEB)

    Jarosch, T.R.; Haselow, J.S.; Rossabi, J.; Burdick, S.A.; Raymond, R.; Young, J.E.; Lombard, K.H.

    1995-01-23

    The purpose of this report is to summarize the results of the program for off-gas treatment of atmospheric emissions of chlorinated volatile organic compounds (CVOCs), in particular trichloroethylene (TCE) and perchloroethylene (PCE). This program was funded through the Department of Energy Office of Technology Development`s VOC`s in Non-Arid Soils Integrated Demonstration (VNID). The off-gas treatment program was initiated after testing of in-situ air stripping with horizontal wells was completed (Looney et al., 1991). That successful test expectedly produced atmospheric emissions of CVOCs that were unabated. It was decided after that test that an off-gas treatment is an integral portion of remediation of CVOC contamination in groundwater and soil but also because several technologies were being developed across the United States to mitigate CVOC emissions. A single platform for testing off-gas treatment technologies would facilitate cost effective evaluation of the emerging technologies. Another motivation for the program is that many CVOCs will be regulated under the Clean Air Act Amendments of 1990 and are already regulated by many state regulatory programs. Additionally, compounds such as TCE and PCE are pervasive subsurface environmental contaminants, and, as a result, a small improvement in terms of abatement efficiency or cost will significantly reduce CVOC discharges to the environment as well as costs to United States government and industry.

  12. An EKC-pattern in historical perspective. Carbon dioxide emissions, technology, fuel prices and growth in Sweden 1870-1997

    Energy Technology Data Exchange (ETDEWEB)

    Lindmark, Magnus [Department of Economic History, Umea University, SE-901 87 Umea (Sweden)

    2002-08-01

    The environmental Kuznets curve (EKC) has been subject to research and debate since the early 1990s. This article examines the inverted-U trajectory of Swedish CO{sub 2} emissions during an extended time period beginning in 1870. The basis for the investigation is a structural time series approach that utilizes a stochastic trend as an indicator of technological and structural change, and GDP growth and changes in the price of fuel and cement price as independent variables. Finally, the development of technological and structural change with respect to CO{sub 2} emissions is interpreted within the context of growth regimes. The result suggests that the period 1920-1960, with high, sustained growth rates was associated with less technological and structural changes relating to CO{sub 2} emissions than periods with lower growth rates, such as the late 1800s and the post-1970 period. Furthermore, it is suggested that time-specific technological clusters may affect EKC patterns.

  13. Emission rates of regulated pollutants from current technology heavy-duty diesel and natural gas goods movement vehicles.

    Science.gov (United States)

    Thiruvengadam, Arvind; Besch, Marc C; Thiruvengadam, Pragalath; Pradhan, Saroj; Carder, Daniel; Kappanna, Hemanth; Gautam, Mridul; Oshinuga, Adewale; Hogo, Henry; Miyasato, Matt

    2015-04-21

    Chassis dynamometer emissions testing of 11 heavy-duty goods movement vehicles, including diesel, natural gas, and dual-fuel technology, compliant with US-EPA 2010 emissions standard were conducted. Results of the study show that three-way catalyst (TWC) equipped stoichiometric natural gas vehicles emit 96% lower NOx emissions as compared to selective catalytic reduction (SCR) equipped diesel vehicles. Characteristics of drayage truck vocation, represented by the near-dock and local drayage driving cycles, were linked to high NOx emissions from diesel vehicles equipped with a SCR. Exhaust gas temperatures below 250 °C, for more than 95% duration of the local and near-dock driving cycles, resulted in minimal SCR activity. The low percentage of activity SCR over the local and near-dock cycles contributed to a brake-specific NOx emissions that were 5-7 times higher than in-use certification limit. The study also illustrated the differences between emissions rate measured from chassis dynamometer testing and prediction from the EMFAC model. The results of the study emphasize the need for model inputs relative to SCR performance as a function of driving cycle and engine operation characteristics.

  14. Alternative technologies for the reduction of greenhouse gas emissions from palm oil mills in Thailand.

    Science.gov (United States)

    Kaewmai, Roihatai; H-Kittikun, Aran; Suksaroj, Chaisri; Musikavong, Charongpun

    2013-01-01

    Alternative methodologies for the reduction of greenhouse gas (GHG) emissions from crude palm oil (CPO) production by a wet extraction mill in Thailand were developed. The production of 1 t of CPO from mills with biogas capture (four mills) and without biogas capture (two mills) in 2010 produced GHG emissions of 935 kg carbon dioxide equivalent (CO2eq), on average. Wastewater treatment plants with and without biogas capture produced GHG emissions of 64 and 47% of total GHG emission, respectively. The rest of the emissions mostly originated from the acquisition of fresh fruit bunches. The establishment of a biogas recovery system must be the first step in the reduction of GHG emissions. It could reduce GHG emissions by 373 kgCO2eq/t of CPO. The main source of GHG emission of 163 kgCO2eq/t of CPO from the mills with biogas capture was the open pond used for cooling of wastewater before it enters the biogas recovery system. The reduction of GHG emissions could be accomplished by (i) using a wastewater-dispersed unit for cooling, (ii) using a covered pond, (iii) enhancing the performance of the biogas recovery system, and (iv) changing the stabilization pond to an aerated lagoon. By using options i-iv, reductions of GHG emissions of 216, 208, 92.2, and 87.6 kgCO2eq/t of CPO, respectively, can be achieved.

  15. Technology Being Developed at Lawrence Berkeley National Laboratory: Ultra-Low- Emission Combustion Technologies for Heat and Power Generation

    Science.gov (United States)

    Cheng, Robert K.

    2001-01-01

    The Combustion Technologies Group at Lawrence Berkeley National Laboratory has developed simple, low-cost, yet robust combustion technologies that may change the fundamental design concept of burners for boilers and furnaces, and injectors for gas turbine combustors. The new technologies utilize lean premixed combustion and could bring about significant pollution reductions from commercial and industrial combustion processes and may also improve efficiency. The technologies are spinoffs of two fundamental research projects: An inner-ring burner insert for lean flame stabilization developed for NASA- sponsored reduced-gravity combustion experiments. A low-swirl burner developed for Department of Energy Basic Energy Sciences research on turbulent combustion.

  16. Power plants in competition 2011. Perspectives of future generation portfolio. Technology-system, stability-market, conditions, with technical exhibition; Kraftwerke im Wettbewerb 2011. Perspektiven des kuenftigen Erzeugungs-Portfolios. Technologie, Systemstabilitaet, Marktbedingungen, mit Fachausstellung

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2011-07-01

    The proceedings on the VGB conference ''power plants in competition 2011'' includes the following contributions: status of European energy policy; market and climate protection; setting up new conventional capacity in Europe and EU regulation; perspectives of power generation in Germany and Europe; market for power generation - challenges and chances for suppliers; development of a European ''network code'' for integration of power plants; impact of ''EU network code'' for design and operation of power plants; outcome of investigation of grid/generation; impact of intermitting generation on power system stability; consequences of low-load operation for coal fired power plants; pro quality - an approach for project management; Sumitomos R and D activities for advanced USC boilers; V and M innovative contribution to the challenges of present and future conventional power plants; steam side oxidation at austenitic boiler tubes; OL3 project - a multicultural challenge; knowledge management - preservation and maintenance of implicit knowledge within a company; competition about green investments - the European targets for renewables; retrofitting of CEZ power plants (coal and gas); power sector skill - addressing the challenges; requirements on structural maintenance in power plants; usage of corrugated tubes in heat exchangers; technical plant documentation; technologies for off-shore wind turbines; solar thermal plants; renewable energy from biomass and integration into the grid; environmentally friendly future power generation with fossil fuels; storage technologies; large-scale underground energy storage; assessment of risk - an insurance company view; human resources as multiplier for a company's value; post-combustion capture pilot plant experiences; CCS strategy of Vattenfall; optimizing plant process management; Enel activities on carbon capture and sequestration; bachelor studies on power plant

  17. Thermal emissions and climate change: Cooler options for future energy technology

    OpenAIRE

    Cowern, Nick E. B.; Ahn, Chihak

    2008-01-01

    Global warming arises from 'temperature forcing', a net imbalance between energy fluxes entering and leaving the climate system and arising within it. Humanity introduces temperature forcing through greenhouse gas emissions, agriculture, and thermal emissions from fuel burning. Up to now climate projections, neglecting thermal emissions, typically foresee maximum forcing around the year 2050, followed by a decline. In this paper we show that, if humanity's energy use grows at 1%/year, slower ...

  18. Thermal emissions and climate change: Cooler options for future energy technology

    OpenAIRE

    Cowern, Nick E.B.; Ahn, Chihak

    2008-01-01

    Global warming arises from 'temperature forcing', a net imbalance between energy fluxes entering and leaving the climate system and arising within it. Humanity introduces temperature forcing through greenhouse gas emissions, agriculture, and thermal emissions from fuel burning. Up to now climate projections, neglecting thermal emissions, typically foresee maximum forcing around the year 2050, followed by a decline. In this paper we show that, if humanity's energy use grows at 1%/year, slower ...

  19. Monte Carlo simulation of a compact microbeam radiotherapy system based on carbon nanotube field emission technology.

    Science.gov (United States)

    Schreiber, Eric C; Chang, Sha X

    2012-08-01

    Microbeam radiation therapy (MRT) is an experimental radiotherapy technique that has shown potent antitumor effects with minimal damage to normal tissue in animal studies. This unique form of radiation is currently only produced in a few large synchrotron accelerator research facilities in the world. To promote widespread translational research on this promising treatment technology we have proposed and are in the initial development stages of a compact MRT system that is based on carbon nanotube field emission x-ray technology. We report on a Monte Carlo based feasibility study of the compact MRT system design. Monte Carlo calculations were performed using EGSnrc-based codes. The proposed small animal research MRT device design includes carbon nanotube cathodes shaped to match the corresponding MRT collimator apertures, a common reflection anode with filter, and a MRT collimator. Each collimator aperture is sized to deliver a beam width ranging from 30 to 200 μm at 18.6 cm source-to-axis distance. Design parameters studied with Monte Carlo include electron energy, cathode design, anode angle, filtration, and collimator design. Calculations were performed for single and multibeam configurations. Increasing the energy from 100 kVp to 160 kVp increased the photon fluence through the collimator by a factor of 1.7. Both energies produced a largely uniform fluence along the long dimension of the microbeam, with 5% decreases in intensity near the edges. The isocentric dose rate for 160 kVp was calculated to be 700 Gy∕min∕A in the center of a 3 cm diameter target. Scatter contributions resulting from collimator size were found to produce only small (<7%) changes in the dose rate for field widths greater than 50 μm. Dose vs depth was weakly dependent on filtration material. The peak-to-valley ratio varied from 10 to 100 as the separation between adjacent microbeams varies from 150 to 1000 μm. Monte Carlo simulations demonstrate that the proposed compact MRT system

  20. Trends in multi-pollutant emissions from a technology-linked inventory for India: II. Residential, agricultural and informal industry sectors

    Science.gov (United States)

    Pandey, Apoorva; Sadavarte, Pankaj; Rao, Anand B.; Venkataraman, Chandra

    2014-12-01

    Dispersed traditional combustion technologies, characterized by inefficient combustion and significant emissions, are widely used in residential cooking and "informal industries" including brick production, food and agricultural product processing operations like drying and cooking operations related to sugarcane juice, milk, food-grain, jute, silk, tea and coffee. In addition, seasonal agricultural residue burning in field is a discontinuous source of significant emissions. Here we estimate fuel consumption in these sectors and agricultural residue burned using detailed technology divisions and survey-based primary data for 2010 and projected between 1996 and 2015. In the residential sector, a decline in the fraction of solid biomass users for cooking from 79% in 1996 to 65% in 2010 was offset by a growing population, leading to a nearly constant population of solid biomass users, with a corresponding increase in the population of LPG users. Emissions from agriculture followed the growth in agricultural production and diesel use by tractors and pumps. Trends in emissions from the informal industries sector followed those in coal combustion in brick kilns. Residential biomass cooking stoves were the largest contributors to emissions of PM2.5, OC, CO, NMVOC and CH4. Highest emitting technologies of BC were residential kerosene wick lamps. Emissions of SO2 were largely from coal combustion in Bull's trench kilns and other brick manufacturing technologies. Diesel use in tractors was the major source of NOx emissions. Uncertainties in emission estimates were principally from highly uncertain emission factors, particularly for technologies in the informal industries.

  1. Control technology for fine-particulate emissions. [71 references; novel devices considered but rejected

    Energy Technology Data Exchange (ETDEWEB)

    1978-10-01

    This report presents a detailed review and critical evaluation of current control technologies as applied to fine particulate emissions from coal-fired utility boilers. Topics reviewed are: sources and characteristics of coals and fly ash; performance characteristics of various types of coal-fired utility boilers; design, operation, performance and maintenance features of the conventional control devices (electrostatic precipitator, fabric filter baghouse, wet scrubber), and descriptions of (and where available, performance data on) novel control devices. The report also includes quantitative assessments of the capabilities of both conventional novel devices to meet three different performance standards - the present New Source Performance Standard (NSPS) of 0.1 lb particulate per MBtu heat input, and standards of 0.05 and 0.03 lb particulate per MBtu. Each of the three conventional devices is compared and rated with respect to eight different performance categories. This information is presented in charts, which can be used to determine the relative effectiveness and attractiveness of these three control devices. The novel devices are compared and rated in the same manner. The major conclusions of the report are: (1) The use of conventional scrubbers for fine particulate control on coal-fired utility boilers will no longer be feasible should a more stringent NSPS be promulgated. (2) At the present NSPS, conventional electrostatic precipitators and baghouses are competitive. For a stricter standard, however, the baghouse will become a more attractive alternative than the precipitator. (3) Novel devices appear to offer almost no hope for this particular application (at a commercial level) between now and 1985 and only little hope before 1990.

  2. An Assessment Of The Life Cycle Costs And GHG Emissions For Alternative Generation Technologies

    Energy Technology Data Exchange (ETDEWEB)

    Donnelly, C. Richard; Carias, Anibal; Ali, Mohammad; Wood, Nicholas; Morgenroth, Michael; Bridgeman, Andrew

    2010-09-15

    The best choices for supplying energy in a manner that can reduce emissions at a reasonable cost while still ensuring grid stability and reliability of supply is a matter of some debate. In this paper, a first principles analysis is performed to look at life-cycle costs and emissions as well as the amount of energy that is provided to the system from various low-emission alternatives, including wind, water, solar and nuclear power. These low-emission sources are then benchmarked against coal-fired energy production to establish a normalized assessment of the clean energy alternatives currently available.

  3. Focal points 2010. Mobility with future - correct investment today. Environmental protection - investment restraint for agriculture? Engine for the climate policy: emission trading; Schwerpunkte 2010. Mobilitaet mit Zukunft - heute richtig investieren. Umweltschutz - Investitionshemmnis fuer die Landwirtschaft? Motor fuer die Klimapolitik: Der Emissionshandel

    Energy Technology Data Exchange (ETDEWEB)

    Ittershagen, Martin; Mavromati, Fotini (comps.)

    2010-04-14

    The publication of the German Federal environmental agency on the focal points 2010 covers the following topics: impetus for an ecological-economic policy; mobility with future -best investment for today: more environmentally compatible investments in traffic infrastructure, better technology - more efficiency, missing charging of environmental cost induces wrong stimuli; environmental protection - investment restraints for agriculture? Engine for climate policy: emission trading; the Federal environmental agency: bridge between science and politics, the Federal environmental agency for mankind and environment; data and facts; publications of the employees.

  4. Fuel and Greenhouse Gas Emission Reduction Potentials by Appropriate Fuel Switching and Technology Improvement in the Canadian Electricity Generation Sector

    Directory of Open Access Journals (Sweden)

    Farshid Zabihian

    2010-01-01

    Full Text Available Problem statement: In recent years, Greenhouse Gas (GHG emissions and their potential effects on global climate change have been a worldwide concern. According to International Energy Agency (IEA, power generation contributes more than half of the global GHG emissions. Approach: Purpose of this study is to examine GHG emission reduction potentials in the Canadian electricity generation sector through fuel switching and adoption of advanced power generation systems. To achieve this objective, eight different scenarios were introduced. In the first scenario, existing power stations’ fuel was switched to natural gas. Existing power plants were replaced by Natural Gas Combined Cycle (NGCC, Integrated Gasification Combined Cycle (IGCC, Solid Oxide Fuel Cell (SOFC, hybrid SOFC and SOFC-IGCC hybrid power stations in scenario numbers 2 to 6, respectively. In last two scenarios, CO2 capture systems were installed in the existing power plants and in the second scenario, respectively. Results: The results showed that Canada’s GHG emissions can be reduced by 33, 59, 20, 64, 69, 29, 86 and 94% based on the first to eighth scenarios, respectively. On the other hand, the second scenario is the most practical and its technology has already matured and is available. In this scenario by replacing existing power plants by NGCC power plants, Canada can fulfill more than 25% of its 238,000 kt year-1 commitment of GHG emission reduction to the Kyoto Protocol. In addition, the GHG emission reduction potentials for each province and Canada as a whole were presented and compared. Based on the results, Alberta, Ontario and Saskatchewan are the biggest producers of GHG in Canada by emitting 49, 21 and 14% of Canada’s GHG emissions, respectively. Therefore, they have higher potential to reduce GHG emissions. The comparison of the results for different provinces revealed that based on efficiency of electricity generation and consumed fuel distribution; specific scenario

  5. MIT-Skywalker: On the use of a markerless system.

    Science.gov (United States)

    Goncalves, Rogerio S; Hamilton, Taya; Krebs, Hermano I

    2017-07-01

    This paper describes our efforts to employ the Microsoft Kinect as a low cost vision control system for the MIT-Skywalker, a robotic gait rehabilitation device. The Kinect enables an alternative markerless solution to control the MIT-Skywalker and allows a more user-friendly set-up. A study involving eight healthy subjects and two stroke survivors using the MIT-Skywalker device demonstrates the advantages and challenges of this new proposed approach.

  6. Assessing income, population, and technology impacts on CO{sub 2} emissions in Canada. Where's the EKC?

    Energy Technology Data Exchange (ETDEWEB)

    Lantz, V.; Feng, Q. [Faculty of Forestry and Environmental Management and Department of Economics, University of New Brunswick, Fredericton, NB (Canada)

    2006-05-01

    This study investigates the macroeconomic forces underlying carbon dioxide (CO{sub 2}) emissions from fossil fuel use in Canada. In keeping with the relevant literature on environmental degradation, three forces are expected to influence CO{sub 2} emissions: gross domestic product per capita (GDP/capita), population and technological change. While previous work has employed reduced-form models that allow for non-linear relationships between CO{sub 2} and GDP/capita, it has been common practice to assume linear relationships between CO{sub 2} and the latter two variables. This study tests a more flexible model using a five-region panel data set in Canada over the period 1970-2000. Findings indicate that GDP/capita is unrelated to CO{sub 2}, that an inverted U-shaped relationship exists with population, and that a U-shaped relationship exists with technology. Thus, technological and population changes are supported over the commonly hypothesized environmental Kuznets curve (EKC, an inverted U-shaped relationship between GDP/capita and environmental degradation) for affecting CO{sub 2} emissions from fossil fuel use in Canada. (author)

  7. [Bernt Ahrenholz : Verweise mit Demonstrativa im Gesprochenen Deutsch...] / Klaus Geyer

    Index Scriptorium Estoniae

    Geyer, Klaus

    2008-01-01

    Arvustus: Ahrenholz, Bernt. Verweise mit Demonstrativa im gesprochenen Deutsch : Grammatik, Zweitspracherwerb und Deutsch als Fremdsprache. Berlin ; New York : de Gruyter, 2007. (Linguistik - Impulse & Tendenzen ; 17)

  8. [Bernt Ahrenholz : Verweise mit Demonstrativa im Gesprochenen Deutsch...] / Klaus Geyer

    Index Scriptorium Estoniae

    Geyer, Klaus

    2008-01-01

    Arvustus: Ahrenholz, Bernt. Verweise mit Demonstrativa im gesprochenen Deutsch : Grammatik, Zweitspracherwerb und Deutsch als Fremdsprache. Berlin ; New York : de Gruyter, 2007. (Linguistik - Impulse & Tendenzen ; 17)

  9. AN ENVIRONMENTAL TECHNOLOGY VERIFICATION (ETV) TESTING OF FOUR MERCURY EMISSION SAMPLING SYSTEMS

    Science.gov (United States)

    CEMs - Tekran Instrument Corp. Series 3300 and Thermo Electron's Mercury Freedom System Continuous Emission Monitors (CEMs) for mercury are designed to determine total and/or chemically speciated vapor-phase mercury in combustion emissions. Performance for mercury CEMs are cont...

  10. An integrated assessment modeling framework for uncertainty studies in global and regional climate change: the MIT IGSM-CAM (version 1.0)

    OpenAIRE

    Monier, E.; Scott, J R; A. P. Sokolov; C. E. Forest; C. A. Schlosser

    2013-01-01

    This paper describes a computationally efficient framework for uncertainty studies in global and regional climate change. In this framework, the Massachusetts Institute of Technology (MIT) Integrated Global System Model (IGSM), an integrated assessment model that couples an Earth system model of intermediate complexity to a human activity model, is linked to the National Center for Atmospheric Research (NCAR) Community Atmosphere Model (CAM). Since the MIT IGSM-CAM framework (version 1.0) inc...

  11. Multi-Pollutant Emissions Control: Pilot Plant Study of Technologies for Reducing Hg, SO3, NOx and CO2 Emissions

    Energy Technology Data Exchange (ETDEWEB)

    Michael L. Fenger; Richard A. Winschel

    2005-08-31

    A slipstream pilot plant was built and operated to investigate technology to adsorb mercury (Hg) onto the existing particulate (i.e., fly ash) by cooling flue gas to 200-240 F with a Ljungstrom-type air heater or with water spray. The mercury on the fly ash was then captured in an electrostatic precipitator (ESP). An alkaline material, magnesium hydroxide (Mg(OH){sub 2}), is injected into flue gas upstream of the air heater to control sulfur trioxide (SO{sub 3}), which prevents acid condensation and corrosion of the air heater and ductwork. The slipstream was taken from a bituminous coal-fired power plant. During this contract, Plant Design and Construction (Task 1), Start Up and Maintenance (Task 2), Baseline Testing (Task 3), Sorbent Testing (Task 4), Parametric Testing (Task 5), Humidification Tests (Task 6), Long-Term Testing (Task 7), and a Corrosion Study (Task 8) were completed. The Mercury Stability Study (Task 9), ESP Report (Task 11), Air Heater Report (Task 12) and Final Report (Task 14) were completed. These aspects of the project, as well as progress on Public Outreach (Task 15), are discussed in detail in this final report. Over 90% mercury removal was demonstrated by cooling the flue gas to 200-210 F at the ESP inlet; baseline conditions with 290 F flue gas gave about 26% removal. Mercury removal is sensitive to flue gas temperature and carbon content of fly ash. At 200-210 F, both elemental and oxidized mercury were effectively captured at the ESP. Mg(OH){sub 2} injection proved effective for removal of SO{sub 3} and eliminated rapid fouling of the air heater. The pilot ESP performed satisfactorily at low temperature conditions. Mercury volatility and leaching tests did not show any stability problems. No significant corrosion was detected at the air heater or on corrosion coupons at the ESP. The results justify larger-scale testing/demonstration of the technology. These conclusions are presented and discussed in two presentations given in July and

  12. Power train and emission control: allocation procedure by OBD-II system for automotive technology

    Science.gov (United States)

    Kalita, Porag

    2017-06-01

    OBD-II, systems were designed to maintain low emissions of in use vehicles, including light and medium duty vehicles. In 1989, the California code of Regulations (CCR) known as OBD - II was adopted by the California Air Resource Board (CARB) and the objective to reduce hydrocarbon (HC) emission caused by malfunction of the vehicles emission control systems. OBD-II provides additional information to engineer for diagnosis and repair of emissions related problems. OBD-II, standardizes on the amount of memory (Freeze Frame) it uses to store the readings of the vehicle sensor when it logs on emission related Intermittent Trouble code (IT). The intent of OBD-II, systems is to detect most vehicle malfunctions when performance of a power train component or system deteriorates to the point that the vehicle’s HC emission exceed standard. The vehicle operator is notified at the time when the vehicle begins to marginally exceed emission standards, by illuminating the Malfunctions Indicator Light (MIL).

  13. Characteristics of NOx emission from Chinese coal-fired power plants equipped with new technologies

    Science.gov (United States)

    Ma, Zizhen; Deng, Jianguo; Li, Zhen; Li, Qing; Zhao, Ping; Wang, Liguo; Sun, Yezhu; Zheng, Hongxian; Pan, Li; Zhao, Shun; Jiang, Jingkun; Wang, Shuxiao; Duan, Lei

    2016-04-01

    Coal combustion in coal-fired power plants is one of the important anthropogenic NOx sources, especially in China. Many policies and methods aiming at reducing pollutants, such as increasing installed capacity and installing air pollution control devices (APCDs), especially selective catalytic reduction (SCR) units, could alter NOx emission characteristics (NOx concentration, NO2/NOx ratio, and NOx emission factor). This study reported the NOx characteristics of eight new coal-fired power-generating units with different boiler patterns, installed capacities, operating loads, and coal types. The results showed that larger units produced less NOx, and anthracite combustion generated more NOx than bitumite and lignite combustion. During formation, the NOx emission factors varied from 1.81 to 6.14 g/kg, much lower than those of older units at similar scales. This implies that NOx emissions of current and future units could be overestimated if they are based on outdated emission factors. In addition, APCDs, especially SCR, greatly decreased NOx emissions, but increased NO2/NOx ratios. Regardless, the NO2/NOx ratios were lower than 5%, in accordance with the guidelines and supporting the current method for calculating NOx emissions from coal-fired power plants that ignore NO2.

  14. Comparison of life cycle carbon dioxide emissions and embodied energy in four renewable electricity generation technologies in New Zealand.

    Science.gov (United States)

    Rule, Bridget M; Worth, Zeb J; Boyle, Carol A

    2009-08-15

    In order to make the best choice between renewable energy technologies, it is important to be able to compare these technologies on the basis of their sustainability, which may include a variety of social, environmental, and economic indicators. This study examined the comparative sustainability of four renewable electricity technologies in terms of their life cycle CO2 emissions and embodied energy, from construction to decommissioning and including maintenance (periodic component replacement plus machinery use), using life cycle analysis. The models developed were based on case studies of power plants in New Zealand, comprising geothermal, large-scale hydroelectric, tidal (a proposed scheme), and wind-farm electricity generation. The comparative results showed that tidal power generation was associated with 1.8 g of CO2/kWh, wind with 3.0 g of CO2/kWh, hydroelectric with 4.6 g of CO2/kWh, and geothermal with 5.6 g of CO2/kWh (not including fugitive emissions), and that tidal power generation was associated with 42.3 kJ/kWh, wind with 70.2 kJ/kWh, hydroelectric with 55.0 kJ/kWh, and geothermal with 94.6 kJ/kWh. Other environmental indicators, as well as social and economic indicators, should be applied to gain a complete picture of the technologies studied.

  15. EPA-developed, patented technologies related to vehicles and fuel emissions

    Data.gov (United States)

    U.S. Environmental Protection Agency — Under the Federal Technology Transfer Act (FTTA), Federal Agencies can patent inventions developed during the course of research. These technologies can then be...

  16. Fuel Savings and Emission Reductions from Next-Generation Mobile Air Conditioning Technology in India: Preprint

    Energy Technology Data Exchange (ETDEWEB)

    Chaney, L.; Thundiyil, K.; Chidambaram, S.; Abbi, Y. P.; Anderson, S.

    2007-05-01

    This paper quantifies the mobile air-conditioning fuel consumption of the typical Indian vehicle, exploring potential fuel savings and emissions reductions these systems for the next generation of vehicles.

  17. Effects of Aftermarket Control Technologies on Gas and Particle Phase Oxidative Potential from Diesel Engine Emissions

    Science.gov (United States)

    Particulate matter (PM) originating from diesel combustion is a public health concern due to its association with adverse effects on respiratory and cardiovascular diseases and lung cancer. This study investigated emissions from three stationary diesel engines (gensets) with var...

  18. Rapid identification of Listeria spp.: an AOAC performance test of the MIT 1000 rapid microbial identification system

    Science.gov (United States)

    Methods that rapidly confirm the identification of foodborne pathogens are highly desired. The Micro Imaging Technology (MIT) 1000 Rapid Microbial Identification (RMID) System is a benchtop instrument that detects laser light scattered from individual bacterial cells in solution with an array of 35 ...

  19. Low CO{sub 2} emission technologies for iron and steelmaking as well as titania slag production

    Energy Technology Data Exchange (ETDEWEB)

    Orth, A.; Anastasijevic, N.; Eichberger, H. [Outokumpu Technol GmbH, Oberursel (Germany)

    2007-08-15

    Outokumpu Technology has developed direct reduction technologies that allow in combination with smelting reduction processes or electric arc furnaces a substantial lowering of CO{sub 2} emissions. In this paper three examples are given: The Circofer process, already demonstrated in pilot plant scale, uses coal as reductant in a two stage CFB (circulating fluidized bed)/FB (fluidized bed) reactor configuration to obtain a highly metallized product suitable for charging into smelting processes. One possible application of Circofer is, in a single stage configuration, as prereduction unit in combination with HIsmelt a smelting reduction technology to produce hot metal using iron ore and coal fines. Using Circofer as prereduction step, the capacity of a given HIsmelt installation can be increased by the factor three to four compared to cold feed and CO, emission can be lowered to values about 20% below the standard of a modern blast furnace, as this combination of technologies requires no agglomeration plant or coke ovens. A second application of Circofer is the combination with an electric arc furnace (EAF) to produce steel directly from direct reduced iron (DRI). Charging hot DRI into an EAF decreases drastically electric power consumption and thus further lowers CO, emission. Applying Circosmelt, the combination of a single stage Circofer system with an electric reduction furnace for ilmenite processing, only half of the electric power consumption required today for titania slag production using cold, unreduced feed material is required. A common additional advantage of all Circofer based routes is that a 99% pure CO{sub 2} stream is removed for process reasons from the process gas and can be used for enhanced crude oil production or sequestration methods.

  20. Dioxin and furan emissions from energy-from-waste plants. Emerging technologies in bioenergy, 3

    Energy Technology Data Exchange (ETDEWEB)

    1984-12-19

    This report reviews the production, measurement and health effects of dioxin and furan emissions from energy-from-waste plants. Laboratory tests have shown that chronic exposure to very low dosages of these materials promotes cancer in rats and mice. Data on human exposure are available only as a result of industrial accidents. One known result of exposure is chloracne, a skin disorder which has resulted in all cases of acute exposure. There are no reports of death, however, and there does not appear to be any convincing evidence that any incident of dioxin exposure has caused the humans involved to develop cancer or to adversely affect their ability to bear normal children. Over 40 refuse-burning plants in 9 countries have been tested and results show that recently-built, well-run facilities have emissions of 1 to 2 mg per ton of refuse burned. Older plants have emissions with values over 20 mg per ton. In a test where poor operating conditions were deliberately established, dioxin levels over 120 mg per ton were detected. It was concluded that dioxin and furan emissions from a properly designed and operated energy-from-waste plant are not a credible health rish as complete thermal destruction is achieved in about one second at temperatures above 800/sup 0/C. If emissions comply with the Ontario provisional standards, there is no likelihood that dioxin or furan emissions will cause a public health problem.

  1. Quantifying Fugitive Methane Emissions at an Underground Coal Fire Using Cavity Ring-Down Spectroscopy Technology

    Science.gov (United States)

    Fleck, D.; Gannon, L.; Kim-Hak, D.; Ide, T.

    2016-12-01

    Understanding methane emissions is of utmost importance due to its greenhouse warming potential. Methane emissions can occur from a variety of natural and anthropogenic sources which include wetlands, landfills, oil/gas/coal extraction activities, underground coal fires, and natural gas distribution systems. Locating and containing these emissions are critical to minimizing their environmental impacts and economically beneficial when retrieving large fugitive amounts. In order to design a way to mitigate these methane emissions, they must first be accurately quantified. One such quantification method is to measure methane fluxes, which is a measurement technique that is calculated based on rate of gas accumulation in a known chamber volume over methane seepages. This allows for quantification of greenhouse gas emissions at a localized level (sub one meter) that can complement remote sensing and other largescale modeling techniques to further paint the picture of emission points. High performance analyzers are required to provide both sufficient temporal resolution and precise concentration measurements in order to make these measurements over only minutes. A method of measuring methane fluxes was developed using the latest portable, battery-powered Cavity Ring-Down Spectroscopy analyzer from Picarro (G4301). In combination with a mobile accumulation chamber, the instrument allows for rapid measurement of methane and carbon dioxide fluxes over wide areas. For this study, methane fluxes that were measured at an underground coal fire near the Four Corners region using the Picarro analyzer are presented. The flux rates collected demonstrate the ability for the analyzer to detect methane fluxes across many orders of magnitude. Measurements were accompanied by simultaneously geotagging the measurements with GPS to georeferenced the data. Methane flux data were instrumental in our ability to characterize the extent and the migration of the underground fire. In the future

  2. Characterizing ammonia emissions from swine farms in eastern North Carolina: part 2--potential environmentally superior technologies for waste treatment.

    Science.gov (United States)

    Aneja, Viney P; Arya, S Pal; Rumsey, Ian C; Kim, D-S; Bajwa, K; Arkinson, H L; Semunegus, H; Dickey, D A; Stefanski, L A; Todd, L; Mottus, K; Robarge, W P; Williams, C M

    2008-09-01

    The need for developing environmentally superior and sustainable solutions for managing the animal waste at commercial swine farms in eastern North Carolina has been recognized in recent years. Program OPEN (Odor, Pathogens, and Emissions of Nitrogen), funded by the North Carolina State University Animal and Poultry Waste Management Center (APWMC), was initiated and charged with the evaluation of potential environmentally superior technologies (ESTs) that have been developed and implemented at selected swine farms or facilities. The OPEN program has demonstrated the effectiveness of a new paradigm for policy-relevant environmental research related to North Carolina's animal waste management programs. This new paradigm is based on a commitment to improve scientific understanding associated with a wide array of environmental issues (i.e., issues related to the movement of N from animal waste into air, water, and soil media; the transmission of odor and odorants; disease-transmitting vectors; and airborne pathogens). The primary focus of this paper is on emissions of ammonia (NH3) from some potential ESTs that were being evaluated at full-scale swine facilities. During 2-week-long periods in two different seasons (warm and cold), NH3 fluxes from water-holding structures and NH3 emissions from animal houses or barns were measured at six potential EST sites: (1) Barham farm--in-ground ambient temperature anaerobic digester/energy recovery/greenhouse vegetable production system; (2) BOC #93 farm--upflow biofiltration system--EKOKAN; (3) Carrolls farm--aerobic blanket system--ISSUES-ABS; (4) Corbett #1 farm--solids separation/ gasification for energy and ash recovery centralized system--BEST; (5) Corbett #2 farm--solid separation/ reciprocating water technology--ReCip; and (6) Vestal farm--Recycling of Nutrient, Energy and Water System--ISSUES-RENEW. The ESTs were compared with similar measurements made at two conventional lagoon and spray technology (LST) farms (Moore

  3. Optimizing Technology to Reduce Mercury and Acid Gas Emissions from Electric Power Plants

    Energy Technology Data Exchange (ETDEWEB)

    Jeffrey C. Quick; David E. Tabet; Sharon Wakefield; Roger L. Bon

    2005-01-31

    Revised maps and associated data show potential mercury, sulfur, and chlorine emissions for U.S. coal by county of origin. Existing coal mining and coal washing practices result in a 25% reduction of mercury in U.S. coal before it is delivered to the power plant. Selection of low-mercury coal is a good mercury control option for plants having hot-side ESP, cold-side ESP, or hot-side ESP/FGD emission controls. Chlorine content is more important for plants having cold-side ESP/FGD or SDA/FF controls; optimum net mercury capture is indicated where chlorine is between 500 and 1000 ppm. Selection of low-sulfur coal should improve mercury capture where carbon in fly ash is used to reduce mercury emissions.

  4. Positron Emission Tomography: Current Challenges and Opportunities for Technological Advances in Clinical and Preclinical Imaging Systems.

    Science.gov (United States)

    Vaquero, Juan José; Kinahan, Paul

    2015-01-01

    Positron emission tomography (PET) imaging is based on detecting two time-coincident high-energy photons from the emission of a positron-emitting radioisotope. The physics of the emission, and the detection of the coincident photons, give PET imaging unique capabilities for both very high sensitivity and accurate estimation of the in vivo concentration of the radiotracer. PET imaging has been widely adopted as an important clinical modality for oncological, cardiovascular, and neurological applications. PET imaging has also become an important tool in preclinical studies, particularly for investigating murine models of disease and other small-animal models. However, there are several challenges to using PET imaging systems. These include the fundamental trade-offs between resolution and noise, the quantitative accuracy of the measurements, and integration with X-ray computed tomography and magnetic resonance imaging. In this article, we review how researchers and industry are addressing these challenges.

  5. STATE-OF-THE-ART AND EMERGING TRUCK ENGINE TECHNOLOGIES FOR OPTIMIZED PERFORMANCE, EMISSIONS AND LIFE CYCLE COSTS

    Energy Technology Data Exchange (ETDEWEB)

    Schittler, M

    2003-08-24

    The challenge for truck engine product engineering is not only to fulfill increasingly stringent emission requirements, but also to improve the engine's economical viability in its role as the backbone of our global economy. While societal impact and therefore emission limit values are to be reduced in big steps, continuous improvement is not enough but technological quantum leaps are necessary. The introduction and refinement of electronic control of all major engine systems has already been a quantum leap forward. Maximizing the benefits of these technologies to customers and society requires full use of parameter optimization and other enabling technologies. The next big step forward will be widespread use of exhaust aftertreatment on all transportation related diesel engines. While exhaust gas aftertreatment has been successfully established on gasoline (Otto cycle) engines, the introduction of exhaust aftertreatment especially for heavy-duty diesel engines will be much mo re demanding. Implementing exhaust gas aftertreatment into commercial vehicle applications is a challenging task but the emission requirements to be met starting in Europe, the USA and Japan in the 2005-2007 timeframe require this step. The engine industry will be able to implement the new technology if all stakeholders support the necessary decisions. One decision has already been taken: the reduction of sulfur in diesel fuel being comparable with the elimination of lead in gasoline as a prerequisite for the three-way catalyst. Now we have the chance to optimize ecology and economy of the Diesel engine simultaneously by taking the decision to provide an additional infrastructure for a NOx reduction agent needed for the introduction of the Selective Catalytic Reduction (SCR) technology that is already implemented in the electric power generation industry. This requires some effort, but the resulting societal benefits, fuel economy and vehicle life cycle costs are significantly better

  6. Dentinhaftung von Zementen. Der Haftverbund von Zementen mit Dentin in Kombination mit verschiedenen indirekten Restaurationsmaterialien

    OpenAIRE

    Peutzfeldt, Anne; Sahafi, Alireza; Flury, Simon

    2011-01-01

    Einleitung: Die Anzahl zahnärztlicher Zemente sowie Restaurationsmaterialien steigt stetig. Die richtige Zementwahl für einen zuverlässigen Haftverbund zwischen Restaurationsmaterial und Zahnsubstanz ist von Interesse für den Kliniker. Ziel der vorliegenden in vitro-Studie war es daher, den Dentinhaftverbund von verschiedenen Zementen in Kombination mit verschiedenen indirekten Restaurationsmaterialien zu untersuchen. Material und Methoden: Zylindrische Probekörper aus sechs Restaurations...

  7. Teaching ``The Physics of Energy'' at MIT

    Science.gov (United States)

    Jaffe, Robert

    2009-05-01

    New physics courses on energy are popping up at colleges and universities across the country. Many require little or no previous physics background, aiming to introduce a broad audience to this complex and critical problem, often augmenting the scientific message with economic and policy discussions. Others are advanced courses, focussing on highly specialized subjects like solar voltaics, nuclear physics, or thermal fluids, for example. About two years ago Washington Taylor and I undertook to develop a course on the ``Physics of Energy'' open to all MIT students who had taken MIT's common core of university level calculus, physics, and chemistry. By avoiding higher level prerequisites, we aimed to attract and make the subject relevant to students in the life sciences, economics, etc. --- as well as physical scientists and engineers --- who want to approach energy issues in a sophisticated and analytical fashion, exploiting their background in calculus, mechanics, and E & M, but without having to take advanced courses in thermodynamics, quantum mechanics, or nuclear physics beforehand. Our object was to interweave teaching the fundamental physics principles at the foundations of energy science with the applications of those principles to energy systems. We envisioned a course that would present the basics of statistical, quantum, and fluid mechanics at a fairly sophisticated level and apply those concepts to the study of energy sources, conversion, transport, losses, storage, conservation, and end use. In the end we developed almost all of the material for the course from scratch. The course debuted this past fall. I will describe what we learned and what general lessons our experience might have for others who contemplate teaching energy physics broadly to a technically sophisticated audience.

  8. Fuel cycle analysis based evaluation of the fuel and emissions reduction potential of adapting the hybrid technology to tricycles

    Energy Technology Data Exchange (ETDEWEB)

    Biona, J.B.M. [Don Bosco Technical College, Mandaluyong City (Philippines); De La Salle University, Center for Engineering and Sustainable Development Research, Manila (Philippines); Culaba, A.B. [De La Salle University, Center for Engineering and Sustainable Development Research, Manila (Philippines); Purvis, M.R.I. [University of Portsmouth, Department of Mechanical Design and Engineering, Portsmouth (United Kingdom)

    2008-02-15

    A preliminary analysis has been conducted to investigate the fuel use and emissions reduction potential of incorporating hybrid systems to two stroke powered tricycles in Metro Manila. Carbureted and direct injection two stroke engine hybrid systems were investigated and compared with the impact of shifting to four stroke engines. Results showed that hybridized direct injection retrofitted two stroke powered systems would be able to provide far better environmental and fuel reduction benefits than the shift to new four strokes tricycles. It is thus recommended that the development of such technology specifically for tricycles be seriously pursued. (orig.)

  9. Efficiency Analysis of Technological Methods for Reduction of NOx Emissions while Burning Hydrocarbon Fuels in Heat and Power Plants

    Directory of Open Access Journals (Sweden)

    S. Kabishov

    2013-01-01

    Full Text Available The paper contains a comparative efficiency analysis pertaining to application of existing technological methods for suppression of nitric oxide formation in heating boilers of heat generators. A special attention has been given to investigation of NOx  emission reduction while burning hydrocarbon fuel with the help of oxygen-enriched air. The calculations have demonstrated that while enriching oxidizer with the help of oxygen up to 50 % (by volume it is possible to reduce volume of NOx formation (while burning fuel unit by 21 %.

  10. Reducing electric sector CO{sub 2} emissions under competition: Facilitating technology development and turnover on both sides of the meter

    Energy Technology Data Exchange (ETDEWEB)

    Connors, S.R. [Massachusetts Institute of Technology, Cambridge, MA (United States)

    1997-12-31

    This paper reviews the technological and institutional factors involved in achieving long-term reductions in CO{sub 2} emissions in the electric sector. A case study of the New England electric sector is used to illustrate factors associated with energy infrastructure turnover and technology development and use. Opportunities for joint implementation of CO{sub 2} reductions are identified, as well as strategies which leverage CO{sub 2} emissions reductions to achieve reductions in other emissions, and to facilitate cost and environmental risk mitigation. Impacts of environmental performance constraints on the electric industry are also identified and analyzed. 5 figs., 1 tab.

  11. Development of Technologies for a High Efficiency, Very Low Emission, Diesel Engine for Light Trucks and Sport Utility Vehicles

    Energy Technology Data Exchange (ETDEWEB)

    Stang, John H.

    2005-12-19

    Cummins Inc., in partnership with the Department of Energy, has developed technology for a new highly efficient, very low emission, diesel engine for light trucks and sport utility vehicles. This work began in April 1997, and started with very aggressive goals for vehicles in the 5751 to 8500 pound GCW weight class. The primary program goals were as follows: (1) EMISSIONS -- NOx = 0.50 g/mi; PM = 0.05 g/mi; CO = 2.8 g/mi; and NMHC = 0.07 g/mi. California decided to issue new and even tougher LEV II light truck regulations late in 1999. EPA also issued its lower Tier 2 regulations late in 2000. The net result was that the targets for this diesel engine project were lowered, and these goals were eventually modified by the publication of Federal Tier 2 emission standards early in 2000 to the following: NOx = 0.07 g/mi; and PM = 0.01 g/mi. (2) FUEL ECONOMY -- The fuel economy goal was 50 percent MPG improvement (combined city/highway) over the 1997 gasoline powered light truck or sport utility vehicle in the vehicle class for which this diesel engine is being designed to replace. The goal for fuel economy remained at 50 percent MPG improvement, even with the emissions goal revisions. (3) COOPERATIVE DEVELOPMENT -- Regular design reviews of the engine program will be conducted with a vehicle manufacturer to insure that the concepts and design specifics are commercially feasible. (DaimlerChrysler has provided Cummins with this design review input.) Cummins has essentially completed a demonstration of proof-of-principle for a diesel engine platform using advanced combustion and fuel system technologies. Cummins reported very early progress in this project, evidence that new diesel engine technology had been developed that demonstrated the feasibility of the above emissions goals. Emissions levels of NOx = 0.4 g/mi and PM = 0.06 g/mi were demonstrated for a 5250 lb. test weight vehicle with passive aftertreatment only. These results were achieved using the full chassis

  12. Development of Technologies for a High Efficiency, Very Low Emission, Diesel Engine for Light Trucks and Sport Utility Vehicles

    Energy Technology Data Exchange (ETDEWEB)

    John H. Stang

    2005-12-31

    Cummins Inc., in partnership with the Department of Energy, has developed technology for a new highly efficient, very low emission, diesel engine for light trucks and sport utility vehicles. This work began in April 1997, and started with very aggressive goals for vehicles in the 5751 to 8500 pound GCW weight class. The primary program goals were as follows: (1) EMISSIONS--NO{sub x} = 0.50 g/mi; PM = 0.05 g/mi; CO = 2.8 g/mi; and NMHC = 0.07 g/mi. California decided to issue new and even tougher LEV II light truck regulations late in 1999. EPA also issued its lower Tier 2 regulations late in 2000. The net result was that the targets for this diesel engine project were lowered, and these goals were eventually modified by the publication of Federal Tier 2 emission standards early in 2000 to the following: NO{sub x} = 0.07 g/mi; and PM = 0.01 g/mi. (2) FUEL ECONOMY--The fuel economy goal was 50 percent MPG improvement (combined city/highway) over the 1997 gasoline powered light truck or sport utility vehicle in the vehicle class for which this diesel engine is being designed to replace. The goal for fuel economy remained at 50 percent MPG improvement, even with the emissions goal revisions. (3) COOPERATIVE DEVELOPMENT--Regular design reviews of the engine program will be conducted with a vehicle manufacturer to insure that the concepts and design specifics are commercially feasible. (DaimlerChrysler has provided Cummins with this design review input.) Cummins has essentially completed a demonstration of proof-of-principle for a diesel engine platform using advanced combustion and fuel system technologies. Cummins reported very early progress in this project, evidence that new diesel engine technology had been developed that demonstrated the feasibility of the above emissions goals. Emissions levels of NOx = 0.4 g/mi and PM = 0.06 g/mi were demonstrated for a 5250 lb. test weight vehicle with passive aftertreatment only. These results were achieved using the full

  13. CO{sub 2} capture - technologies for greenhouse gas emissions abatement; Le captage du CO{sub 2} - des technologies pour reduire les emissions de gaz a effet de serre

    Energy Technology Data Exchange (ETDEWEB)

    Lecomte, F.; Broutin, P.; Lebas, E

    2009-07-01

    CO{sub 2} capture and geologic sequestration is now recognized as one of the technologies to implement for the abatement of greenhouse gas emissions and to fight against global warming. Where, how and at what price CO{sub 2} can be captured? This book tries to answer these questions by taking stock of the state-of-the-art of the technologies needed. It presents the three main ways involving CO{sub 2} capture technologies that have been considered: the post-combustion way which aims at extracting the CO{sub 2} content of industrial smokes; the oxi-combustion way which consists in using oxygen combustion to obtain CO{sub 2}-enriched smokes; and the pre-combustion way which is used to extract carbon from the source fuel for the production of hydrogen. For each of these ways, the technologies available today or under development are described with precision and with their respective costs. (J.S.)

  14. Technologies and policies for controlling greenhouse gas emissions from the U. S. automobile and light truck fleet.

    Energy Technology Data Exchange (ETDEWEB)

    Plotkin, S.

    1999-01-01

    The message conveyed by the above discussion is that there are no shortages of technologies available to improve the fuel efficiency of the U.S. fleet of autos and light trucks. It clearly is technically feasible to improve greatly the fuel economy of the average new light-duty vehicle. Many of these technologies require tradeoffs, however, that manufacturers are unwilling or (as yet) unable to make in today's market and regulatory environment. These tradeoffs involve higher costs (that might be reduced substantially over time with learning and economies of scale), technical risk and added complexity, emissions concerns (especially for direct injection engines, and especially with respect to diesel engine technology), and customer acceptance issues. Even with current low U.S. oil prices, however, many of these technologies may find their way into the U.S. market, or increase their market share, as a consequence of their penetration of European and Japanese markets with their high gasoline prices. Automotive technology is ''fungible'' that is, it can be easily transported from one market to another. Nevertheless, it probably is unrealistic to expect substantial increases in the average fuel economy of the U.S. light-duty fleet without significant changes in the market. Without such changes, the technologies that do penetrate the U.S. market are more likely to be used to increase acceleration performance or vehicle structures or enable four wheel drive to be included in vehicles without a net mpg penalty. In other words, technology by itself is not likely to be enough to raise fleet fuel economy levels - this was the conclusion of the 1995 Ailomar Conference on Energy and Sustainable Transportation, organized by the Transportation Research Board's Committees on Energy and Alternative Fuels, and it is one I share.

  15. Description of emission control using fluidized-bed, heat-exchange technology

    Energy Technology Data Exchange (ETDEWEB)

    Vogel, G.J.; Grogan, P.J.

    1980-06-01

    Environmental effects of fluidized-bed, waste-heat recovery technology are identified. The report focuses on a particular configuration of fluidized-bed, heat-exchange technology for a hypothetical industrial application. The application is a lead smelter where a fluidized-bed, waste-heat boiler (FBWHB) is used to control environmental pollutants and to produce steam for process use. Basic thermodynamic and kinetic information for the major sulfur dioxide (SO/sub 2/) and NO/sub x/ removal processes is presented and their application to fluidized-bed, waste heat recovery technology is discussed. Particulate control in fluidized-bed heat exchangers is also discussed.

  16. Ammonia Emissions from the Agriculture Sector of Argentina in a Context of Changing Technologies and Practices

    Science.gov (United States)

    Dawidowski, L. E.

    2015-12-01

    Agriculture is a key sector of the Argentinean economy, accounting for 6 to 8 5% of the GDP in the last ten years. Argentina switched in the 90´s from an articulated co-evolution between extensive livestock and crop farming, with annual rotation of crops and livestock, to intensive decoupled practices. Under these new production schemes, ecosystems were supplied with more nutrients, generating increasing levels of wastes. Other changes have also occurred, associated with the shift of the agricultural frontier and the consequent reduction in the cattle stock. In addition, changes related to climate through the strong increase in rainfall in the 80s and 90s in the west Pampas, helped to boost agricultural development. The agriculture sector accounts for practically all NH3 emissions in Argentina, however no inventory has been thus far available. To bridge this gap and particularly to have accurate input information to run coupled atmospheric chemistry models for secondary inorganic aerosols, we estimated 2000-2012 NH3 emissions, both at national and spatially disaggregated levels. Of particular interest for us was also temporal disaggregation as crops growing and temperature exhibit strong seasonal variability. As no NH3 inventory was available we also estimated related N2O emissions to verify our estimates with those of national GHG emission inventory (NEI). National NH3 emissions in 2012 amounted to 309.9 Gg, use of fertilizers accounted for 43.6%, manure management 18,9%, manure in pasture 36,0% and agricultural waste burning 1.5%. Our N2O estimates are in good agreement with the GHG-NEI. NH3 estimates in the EDGAR database for 2008 are 84.0% higher than ours for this year, and exhibit more significant differences per category, namely 113,6% higher for use of fertilizers and about 500% higher for agricultural waste burning. Urea dominates national NH3 emissions, accounting for 32,8% of the total and its use for wheat and corn crops dominates the trend.

  17. How does green technology influence CO2 emission in China?--An empirical research based on provincial data of China.

    Science.gov (United States)

    Ding, Weina; Han, Botang; Zhao, Xin; Mazzanti, Massimiliano

    2015-07-01

    This paper investigates the role of green innovations aimed at reducing carbon dioxide emissions as a factor that compensates for growth and population effects. It has been shown from tests that the positive effect of green innovations on carbon emissions exists within a STIRPAT framework from a local perspective. The panel data is derived from China Statistical Yearbook and China Intellectual Property Office covered from 1999 to 2013. In addition,the static panel model was run to estimate the diversity among three typical regions of China. The main result shows that the green technology change has not played a dominant role yet in promoting environmental protection, while a scale effect (Affluence and Population)still prevails, although green patents show positive influences on the CO2 emission reduction inthe whole country as well as the East and West regions, except the Central region. Moreover, it turns out that the classical EKC hypothesis does stand in China, referring to the three regions with the inverted "U" shape. The analysis gives suggestions to the policy makers, which would support enlarging the investment scale on green patents and encourage international corporation with environmental related innovations.

  18. Stochastic noise characteristics in matrix inversion tomosynthesis (MITS).

    Science.gov (United States)

    Godfrey, Devon J; McAdams, H P; Dobbins, James T Third

    2009-05-01

    Matrix inversion tomosynthesis (MITS) uses known imaging geometry and linear systems theory to deterministically separate in-plane detail from residual tomographic blur in a set of conventional tomosynthesis ("shift-and-add") planes. A previous investigation explored the effect of scan angle (ANG), number of projections (N), and number of reconstructed planes (NP) on the MITS impulse response and modulation transfer function characteristics, and concluded that ANG = 20 degrees, N = 71, and NP = 69 is the optimal MITS imaging technique for chest imaging on our prototype tomosynthesis system. This article examines the effect of ANG, N, and NP on the MITS exposure-normalized noise power spectra (ENNPS) and seeks to confirm that the imaging parameters selected previously by an analysis of the MITS impulse response also yield reasonable stochastic properties in MITS reconstructed planes. ENNPS curves were generated for experimentally acquired mean-subtracted projection images, conventional tomosynthesis planes, and MITS planes with varying combinations of the parameters ANG, N, and NP. Image data were collected using a prototype tomosynthesis system, with 11.4 cm acrylic placed near the image receptor to produce lung-equivalent beam hardening and scattered radiation. Ten identically acquired tomosynthesis data sets (realizations) were collected for each selected technique and used to generate ensemble mean images that were subtracted from individual image realizations prior to noise power spectra (NPS) estimation. NPS curves were normalized to account for differences in entrance exposure (as measured with an ion chamber), yielding estimates of the ENNPS for each technique. Results suggest that mid- and high-frequency noise in MITS planes is fairly equivalent in magnitude to noise in conventional tomosynthesis planes, but low-frequency noise is amplified in the most anterior and posterior reconstruction planes. Selecting the largest available number of projections (N

  19. Final Technical Report for the MIT Annular Fuel Research Project

    Energy Technology Data Exchange (ETDEWEB)

    Mujid S. Kazimi; Pavel Hejzlar

    2008-01-31

    MIT-NFC-PR-082 (January 2006) Abstract This summary provides an overview of the results of the U.S. DOE funded NERI (Nuclear Research ENergy Initiative) program on development of the internally and externally cooled annular fuel for high power density PWRs. This new fuel was proposed by MIT to allow a substantial increase in poer density (on the order of 30% or higher) while maintaining or improving safety margins. A comprehensive study was performed by a team consisting of MIT (lead organization), Westinghuse Electric Corporation, Gamma Engineering Corporation, Framatome ANP(formerly Duke Engineering) and Atomic Energy of Canada Limited.

  20. Particulate emissions from modern and old technology wood combustion induce distinct time-dependent patterns of toxicological responses in vitro.

    Science.gov (United States)

    Happo, Mikko S; Hirvonen, Maija-Riitta; Uski, Oskari; Kasurinen, Stefanie; Kelz, Joachim; Brunner, Thomas; Obernberger, Ingwald; Jalava, Pasi I

    2017-10-01

    Toxicological characterisation of combustion emissions in vitro are often conducted with macrophage cell lines, and the majority of these experiments are based on responses measured at 24h after the exposure. The aim of this study was to investigate how significant role time course plays on toxicological endpoints that are commonly measured in vitro. The RAW264.7 macrophage cell line was exposed to PM1 samples (150μg/ml) from biomass combustion devices representing old and modern combustion technologies for 2, 4, 8, 12, 24 and 32h. After the exposure, cellular metabolic activity, cell membrane integrity, cellular DNA content, DNA damage and production of inflammatory markers were assessed. The present study revealed major differences in the time courses of the responses, statistical differences between the studied samples mostly limiting to differences between modern and old technology samples. Early stage responses consisted of disturbances in metabolic activity and cell membrane integrity. Middle time points revealed increases in chemokine production, whereas late-phase responses exhibited mostly increased DNA-damage, decreased membrane integrity and apoptotic activity. Altogether, these results implicate that the time point of measurement has to be considered carefully, when the toxicity of emission particles is characterised in in vitro study set-ups. Copyright © 2017 Elsevier Ltd. All rights reserved.

  1. Application of automobile emission control technology to light piston aircraft engines

    Science.gov (United States)

    Tripp, D.; Kittredge, G.

    1976-01-01

    The possibility was evaluated for achieving the EPA Standards for HC and CO emissions through the use of air-fuel ratio enleanment at selected power modes combined with improved air-fuel mixture preparation, and in some cases improved cooling. Air injection was also an effective approach for the reduction of HC and CO, particularly when combined with exhaust heat conservation techniques such as exhaust port liners.

  2. Assessment of Anisotropic Semiconductor Nanorod and Nanoplatelet Heterostructures with Polarized Emission for Liquid Crystal Display Technology

    Energy Technology Data Exchange (ETDEWEB)

    Cunningham, Patrick D.; Souza, João B.; Fedin, Igor; She, Chunxing; Lee, Byeongdu; Talapin, Dmitri V.

    2016-06-28

    Semiconductor nanorods can emit linear-polarized light at efficiencies over 80%. Polarization of light in these systems, confirmed through single-rod spectroscopy, can be explained on the basis of the anisotropy of the transition dipole moment and dielectric confinement effects. Here we report emission polarization in macroscopic semiconductor polymer composite films containing CdSe/CdS nanorods and colloidal CdSe nanoplatelets. Anisotropic nanocrystals dispersed in polymer films of poly butyl-co-isobutyl methacrylate (PBiBMA) can be stretched mechanically in order to obtain unidirectionally aligned arrays. A high degree of alignment, corresponding to an orientation factor of 0.87, was achieved and large areas demonstrated polarized emission, with the contrast ratio I-parallel to/I-perpendicular to= 5.6, making these films viable candidates for use in liquid crystal display (LCD) devices. To some surprise, we observed significant optical anisotropy and emission polarization for 2D CdSe nanoplatelets with the electronic structure of quantum wells. The aligned nanorod arrays serve as optical funnels, absorbing unpolarized light and re-emitting light from deep-green to red with quantum efficiencies over 90% and high degree of linear polarization. Our results conclusively demonstrate the benefits of anisotropic nanostructures for LCD backlighting. The polymer films with aligned CdSe/CdS dot-in-rod and rod-in-rod nanostructures show more than 2-fold enhancement of brightness compared to the emitter layers with randomly oriented nanostructures. This effect can be explained as the combination of linearly polarized luminescence and directional emission from individual nanostructures.

  3. A computationally assisted spectroscopic technique to measure secondary electron emission coefficients in technological rf plasmas

    Science.gov (United States)

    Berger, Birk; Schulze, Julian; Daksha, Manaswi; Schuengel, Edmund; Koepke, Mark; Korolov, Ihor; Derzsi, Aranka; Donko, Zoltan

    2016-09-01

    A Computationally Assisted Spectroscopic Technique to measure secondary electron emission coefficients (y-CAST) in capacitive rf plasmas is proposed. This non-intrusive, sensitive diagnostic is based on a combination of Phase Resolved Optical Emission Spectroscopy and PIC simulations. Under most conditions in electropositive plasmas the spatio-temporally resolved electron-impact excitation rate features two distinct maxima adjacent to each electrode at different times within one rf period. One maximum is the consequence of an energy gain of the electrons due to sheath expansion. The second maximum is produced by electrons accelerated towards the plasma bulk by the sheath electric field at the time of maximum voltage drop across the sheath. Due to the different excitation mechanisms the ratio of the intensities of these maxima is very sensitive to y, which allows for its determination via comparing the experimentally measured excitation profiles with corresponding simulation data obtained with various y-coefficients. This diagnostic is tested here in a geometrically symmetric reactor, for stainless steel electrodes and argon gas. An effective secondary electron emission coefficient of y = 0.067+-0.010 is obtained, which is in excellent agreement with previous experimental results.

  4. MIT Lincoln Laboratory: Technology in Support of National Security

    Science.gov (United States)

    2011-01-01

    called “hit-to-kill” interceptors that use the enormous kinetic energy of a high-velocity impact to destroy the warhead without requiring any...struck with high-speed kinetic warheads, were used to generate lethality models. These models were then used to develop algorithms that were later...of emitters operating in the low VHF band as targets. A network of distance-measuring equipment ( DME ) transmitters located the aircraft position

  5. Research on Emissions, Air quality, Climate, and Cooking Technologies in Northern Ghana (REACCTING): study rationale and protocol.

    Science.gov (United States)

    Dickinson, Katherine L; Kanyomse, Ernest; Piedrahita, Ricardo; Coffey, Evan; Rivera, Isaac J; Adoctor, James; Alirigia, Rex; Muvandimwe, Didier; Dove, MacKenzie; Dukic, Vanja; Hayden, Mary H; Diaz-Sanchez, David; Abisiba, Adoctor Victor; Anaseba, Dominic; Hagar, Yolanda; Masson, Nicholas; Monaghan, Andrew; Titiati, Atsu; Steinhoff, Daniel F; Hsu, Yueh-Ya; Kaspar, Rachael; Brooks, Bre'Anna; Hodgson, Abraham; Hannigan, Michael; Oduro, Abraham Rexford; Wiedinmyer, Christine

    2015-02-12

    Cooking over open fires using solid fuels is both common practice throughout much of the world and widely recognized to contribute to human health, environmental, and social problems. The public health burden of household air pollution includes an estimated four million premature deaths each year. To be effective and generate useful insight into potential solutions, cookstove intervention studies must select cooking technologies that are appropriate for local socioeconomic conditions and cooking culture, and include interdisciplinary measurement strategies along a continuum of outcomes. REACCTING (Research on Emissions, Air quality, Climate, and Cooking Technologies in Northern Ghana) is an ongoing interdisciplinary randomized cookstove intervention study in the Kassena-Nankana District of Northern Ghana. The study tests two types of biomass burning stoves that have the potential to meet local cooking needs and represent different "rungs" in the cookstove technology ladder: a locally-made low-tech rocket stove and the imported, highly efficient Philips gasifier stove. Intervention households were randomized into four different groups, three of which received different combinations of two improved stoves, while the fourth group serves as a control for the duration of the study. Diverse measurements assess different points along the causal chain linking the intervention to final outcomes of interest. We assess stove use and cooking behavior, cooking emissions, household air pollution and personal exposure, health burden, and local to regional air quality. Integrated analysis and modeling will tackle a range of interdisciplinary science questions, including examining ambient exposures among the regional population, assessing how those exposures might change with different technologies and behaviors, and estimating the comparative impact of local behavior and technological changes versus regional climate variability and change on local air quality and health outcomes

  6. Educational Outreach at the MIT Plasma Science and Fusion Center

    Science.gov (United States)

    Rivenberg, Paul; Thomas, Paul

    2006-10-01

    At the MIT PSFC, student and staff volunteers work together to increase the public's knowledge of fusion science and plasma technology. Seeking to generate excitement in young people about science and engineering, the PSFC hosts a number of educational outreach activities throughout the year, including Middle and High School Outreach Days. The PSFC also has an in-school science demonstration program on the theme of magnetism. The Mr. Magnet Program, headed by Mr. Paul Thomas, has been bringing lively demonstrations on magnetism into local elementary and middle schools for 15 years. This year Mr. Magnet presented the program to nearly 30,000 students at over 67 schools and other events, reaching kindergartners through college freshmen. In addition to his program on magnetism, he is offering an interactive lecture about plasma to high schools. The "Traveling Plasma Lab" encourages students to learn more about plasma science while having fun investigating plasma properties using actual laboratory techniques and equipment. Beyond the classroom, Paul Thomas has provided technical training for Boston Museum of Science staff in preparation for the opening of a Star Wars exhibit. His hands-on demos have also been filmed by the History Channel for a one-hour program about Magnetism, which aired in June 2006.

  7. Analysis on carbon dioxide emission reduction during the anaerobic synergetic digestion technology of sludge and kitchen waste: Taking kitchen waste synergetic digestion project in Zhenjiang as an example.

    Science.gov (United States)

    Guo, Qia; Dai, Xiaohu

    2017-08-30

    With the popularization of municipal sewage treatment facilities, the improvement of sewage treatment efficiency and the deepening degree of sewage treatment, the sludge production of sewage plant has been sharply increased. Carbon emission during the process of municipal sewage treatment and disposal has become one of the important sources of greenhouse gases that cause greenhouse effect. How to reduce carbon dioxide emissions during sewage treatment and disposal process is of great significance for reducing air pollution. Kitchen waste and excess sludge, as two important organic wastes, once uses anaerobic synergetic digestion technology in the treatment process can on the one hand, avoid instability of sludge individual anaerobic digestion, improve sludge degradation rate and marsh gas production rate, and on the other hand, help increase the reduction of carbon dioxide emissions to a great extent. The paper uses material balance method, analyzes and calculates the carbon dioxide emissions from kitchen waste and sludge disposed by the anaerobic synergetic digestion technology, compares the anaerobic synergetic digestion technology with traditional sludge sanitary landfill technology and works out the carbon dioxide emission reductions after synergetic digestion. It takes the kitchen waste and sludge synergetic digestion engineering project of Zhenjiang city in Jiangsu province as an example, makes material balance analysis using concrete data and works out the carbon dioxide daily emission reductions. The paper analyzes the actual situation of emission reduction by comparing the data, and found that the synergetic digestion of kitchen waste and sludge can effectively reduce the carbon dioxide emission, and the reduction is obvious especially compared with that of sludge sanitary landfill, which has a certain effect on whether to promote the use of the technology. Copyright © 2017 Elsevier Ltd. All rights reserved.

  8. Nichterkennen von Vorhofflimmern bei Patienten mit kardialer Resynchronisationstherapie

    Directory of Open Access Journals (Sweden)

    Strohmer B

    2005-01-01

    Full Text Available Obwohl eine Intoleranz der kardialen Resynchronisationstherapie (CRT unüblich ist, sollten entsprechende Symptome auf ihre Ursache hin genau abgeklärt werden. Atriale Tachyarrhythmien (AT werden bei Patienten mit chronischer Herzinsuffizienz relativ häufig beobachtet. Dieser Bericht beschreibt ein rhythmologisches Problem, welches oft unerkannt bleibt und in unserem CRTKollektiv bei knapp 8 % der Patienten aufgetreten ist. Paroxysmales Vorhofflattern wurde durch den CRT-Schrittmacher nicht erkannt, da jede zweite Flatterwelle exakt mit der atrialen Ausblendzeit (PVAB = postventrikuläres atriales Blanking zusammenfiel. Dies führte zu einem Versagen der Mode-Switch-Funktion durch Nichterkennung von stabilem Vorhofflattern, welches mit sehr stabiler Zykluslänge auftrat. Dieses sog. "2:1-lock-in"-Phänomen resultierte in rascher und anhaltender biventrikulärer Stimulation, welche sich bei den betroffenen Patienten klinisch als unangenehmes Herzklopfen mit zunehmender Atemnot bemerkbar machte.

  9. Russisch: Weltsprache mit Trauma - gleichberechtigte Sprache im FMF

    OpenAIRE

    Schröder, Konrad

    1998-01-01

    Russisch: Weltsprache mit Trauma - gleichberechtigte Sprache im FMF. - In: Russisch in den alten und neuen Bundesländern / Bernhard Frenzel ... (Hrsg.). - Berlin ; München : Langenscheidt, 1998. - S. 5-8. - (Fachverband Moderne Fremdsprachen: FMF-Schriften ; 2)

  10. Emission Inventories of Carbon-containing Greenhouse Gases in and Technological Measures for Their Abatement

    Institute of Scientific and Technical Information of China (English)

    Zhuang Yahui; Zhang Hongxun; Wang Xiaoke; Li Changsheng

    2004-01-01

    The report summarizes surveys on carbon inventories and initiatives on sustainable carbon cycling taken by the Research Center for EcoEnvironmental Sciences, where the authors work/worked. The first part of the report, which appeared in the preceding issue of this journal, deals with the concept of sustainable carbon cycling, the historic evolution of carbon cycling processes in China, carbon pool enhancement, value addition,carbon sequestration and carbon balance. This very paper, as the second part of the report, covers the results of carbon dynamics modeling, emission inventories of various carbon-containing greenhouse gases and their potential abatement measures.

  11. Measurement of Oil and Natural Gas Well Pad Enclosed Combustor Emissions Using Optical Remote Sensing Technologies

    Science.gov (United States)

    The U.S. Environmental Protection Agency (EPA), Office of Research and Development (ORD) and EPA Region 8 are collaborating under the EPA’s Regional Applied Research Effort (RARE) program to evaluate ground-based remote sensing technologies that could be used to characterize emis...

  12. Measurement of Oil and Gas Well Pad Enclosed Combustor Emissions Using Optical Remote Sensing Technologies

    Science.gov (United States)

    The U.S. EPA Office of Research and Development and U.S. EPA Region 8 are collaborating to investigate the impact of energy production under the EPA’s Regional Applied Research Effort (RARE) program. As part of this effort, a research study was conducted to evaluate technologies...

  13. Entwicklung einer Spurendriftkammer mit Mikrostreifenauslese für Schwerionenexperimente

    OpenAIRE

    Frankenfeld, Ulrich

    1996-01-01

    Im Rahmen dieser Arbeit wurde ein Prototyp einer Spurendriftkammer mit Mikrostreifenauslese, wie sie als hochauflösende Spurendetektoren in der Kern- und Teilchenphysik zum Einsatz kommen sollen, konstruiert und getestet. Besonderes Augenmerk lag hierbei auf der Signalform und -verteilung, sowie auf dem Langzeitverhalten. Für die verschiedenen Messungen dieser Arbeit wurden die Mikrostreifen-Gasdetektoren in ein Edelstahlrohr eingebaut, das mit einem Vakuumpumpen-System verbunden ist. Durch E...

  14. Field Evaluations Test Plan for Validation of Alternative Low-Emission Surface Preparation/Depainting Technologies for Structural Steel

    Science.gov (United States)

    Lewis, Pattie

    2005-01-01

    Headquarters National Aeronautics and Space Administration (NASA) chartered the Acquisition Pollution Prevention (AP2) Office to coordinate agency activities affecting pollution prevention issues identified during system and component acquisition and sustainment processes. The primary objectives of the AP2 Office are to: (1) Reduce or eliminate the use of hazardous materials (HazMats) or hazardous processes at manufacturing, remanufacturing, and sustainment locations. (2) Avoid duplication of effort in actions required to reduce or eliminate HazMats through joint center cooperation and technology sharing. To achieve a substrate condition suitable for the application of a coating system, both new and old (in-situ) substrates must undergo some type of surface preparation and/or depainting operation to ensure adhesion of the new coating system. The level of cleanliness or anchor profile desired is typically a function of the type of coating to be applied and the specification being adhered to. In high performance environments, cleanliness and surface profile requirements for carbon steel (the dominant substrate for facilities, structures and equipment) dictates the use of abrasive media. Many of the abrasive media currently used across NASA and Air Force Space Command (AFSPC) installations generate large quantities of fugitive particulate emissions and waste. The high quantities of airborne dust and waste generated from these operations pose significant environmental concern. Efforts to contain emissions and the reduce quantity of waste generated have significant implications on project cost; this is often a deterrent to engaging in maintenance activities. In response to recent technological developments and NASA's and AFSPC's need to undertake environmentally conscious corrosion prevention projects, a review of the industry needs to be undertaken to evaluate surface preparation technologies (materials and processes) for embrace. This project will identify, evaluate

  15. Therapie mit Vitamin D: Gibt es Grenzen?

    Directory of Open Access Journals (Sweden)

    Scharla SH

    2014-01-01

    Full Text Available Vitamin D wird in der Leber zum 25-Hydroxyvitamin D umgewandelt, welches die Speicherform darstellt. Die Serumkonzentration von 25-Hydroxyitamin D ist ein Maß für die Vitamin- D-Versorgung. In der Niere wird die Hormonform von Vitamin D, das 1,25-Dihydroxyvitamin D (= Calcitriol oder D-Hormon, hergestellt (endokrine Funktion, aber auch einige extrarenale Gewebe können Calcitriol lokal bilden (autokrine und parakrine Wirkung. Calcitriol hat pleiotrope Effekte: Neben dem Mineralhaushalt werden auch Immunsystem, Zelldifferenzierung, Insulinwirkung und kardiovaskuläres System beeinflusst. Die Therapie mit Vitamin D wird deshalb heute nicht nur zur Behandlung von Störungen des Mineralhaushaltes, sondern auch zur Prävention und Therapie von Infektionen, Autoimmunerkrankungen, Krebs, Bluthochdruck und Herzerkrankungen propagiert. Derzeit fehlen jedoch noch vielfach kontrollierte Studien, die den Nutzen einer Vitamin-D-Behandlung außerhalb von Risikogruppen nachweisen oder die prophylaktische Vitamin-D-Supplementation der allgemeinen Bevölkerung rechtfertigen würden. Überdies ist Vorsicht bei zu hohen Dosierungen geboten, da hohe Vitamin-D-Konzentrationen möglicherweise auch negative Effekte haben können. Die Anwendung einer Vitamin-D-Stoßtherapie (hohe Einmaldosierung ist obsolet.

  16. High-resolution inventory of technologies, activities, and emissions of coal-fired power plants in China from 1990 to 2010

    Science.gov (United States)

    Liu, F.; Zhang, Q.; Tong, D.; Zheng, B.; Li, M.; Huo, H.; He, K. B.

    2015-12-01

    This paper, which focuses on emissions from China's coal-fired power plants during 1990-2010, is the second in a series of papers that aims to develop a high-resolution emission inventory for China. This is the first time that emissions from China's coal-fired power plants were estimated at unit level for a 20-year period. This inventory is constructed from a unit-based database compiled in this study, named the China coal-fired Power plant Emissions Database (CPED), which includes detailed information on the technologies, activity data, operation situation, emission factors, and locations of individual units and supplements with aggregated data where unit-based information is not available. Between 1990 and 2010, compared to a 479 % growth in coal consumption, emissions from China's coal-fired power plants increased by 56, 335, and 442 % for SO2, NOx, and CO2, respectively, and decreased by 23 and 27 % for PM2.5 and PM10 respectively. Driven by the accelerated economic growth, large power plants were constructed throughout the country after 2000, resulting in a dramatic growth in emissions. The growth trend of emissions has been effectively curbed since 2005 due to strengthened emission control measures including the installation of flue gas desulfurization (FGD) systems and the optimization of the generation fleet mix by promoting large units and decommissioning small ones. Compared to previous emission inventories, CPED significantly improved the spatial resolution and temporal profile of the power plant emission inventory in China by extensive use of underlying data at unit level. The new inventory developed in this study will enable a close examination of temporal and spatial variations of power plant emissions in China and will help to improve the performances of chemical transport models by providing more accurate emission data.

  17. Rigiscan®-Monitoring der Erektion unter audiovisueller sexueller Stimulation ohne/mit Viagra™ bei Patienten mit erektiler Dysfunktion

    Directory of Open Access Journals (Sweden)

    Perabo FGE

    2000-01-01

    Full Text Available Die orale Medikation mit Sildenafil (Viagra™ hat sich zur Therapie der erektilen Dysfunktion etabliert und relativiert die Differentialdiagnose zwischen psychogener und organischer Dysfunktion mit den entsprechenden therapeutischen Konsequenzen. Diesem Problem widmet sich diese Studie zur Prüfung der erektilen Antwort unter RigiScan®-Monitoring ohne/mit 50 mg Viagra™. 64 Patienten (mittleres Alter 48 Jahre mit einer erektilen Dysfunktion arteriogener (n = 10, venöser (n = 7, gemischt neurogen/vaskulärer (n = 15 und psychogener (n = 32 Genese von mehr als 6 Monaten Dauer wurden in die Studie aufgenommen. Alle Patienten wurden eingehend diagnostisch abgeklärt, inklusive Hormonlabor, dynamischer Pharmako-Duplexsonographie und, falls indiziert, mit einer Cavernosometrie/ -graphie. Zur Testung der penilen Rigidität und zur Objektivierung der Erektion wurde das "real-time" RigiScan® verwendet. In zwei konsekutiven Messungen wurden sowohl die direkte erektile Antwort auf visuelle Stimulation als auch die nächtlichen Erektionen abgeleitet und die Meßergebnisse mit den Begleiterkrankungen, "lifestyle"-Faktoren und dem Ergebnis der Pharmako-Duplexsonographie korreliert. Es fand sich keine Korrelation zwischen der Ätiologie der erektilen Dysfunktion in bezug auf organische oder psychogene Genese und dem Alter der Patienten, der Dauer der Erektionsstörung, dem Nikotinabusus, den Blutfetten, den Testosteronwerten, dem klinischen Ergebnis der Pharmakotestung (Erektionsgrad und dem duplexsonographisch gemessenen Fluß der penilen Arterien. Hingegen zeigte sich eine positive Korrelation zwischen Genese der erektilen Dysfunktion (organisch bzw. psychogen und dem RigiScan®-Meßergebnis (r = 0,29. Patienten mit psychogen bedingter Erektionsstörung profitierten am meisten von Viagra™, während Patienten mit vaskulärer Genese oder gemischt neurogener/vaskulärer Genese deutlich schlechter auf Viagra™ ansprachen. Es bestand keine Korrelation

  18. Certification, with some shortcomings; Mit Luecken zertifiziert

    Energy Technology Data Exchange (ETDEWEB)

    Schott, Christina

    2012-03-15

    Cleared forests, dislodged farmers, and high emissions: There are serious doubts concerning the ecological quality of palm oil from Indonesia and Malaysia has serious. There are few producers that meet the EU sustainability criteria.

  19. Coupled Physical/Chemical and Biofiltration Technologies to Reduce Air Emissions from Forest Products Industries

    Energy Technology Data Exchange (ETDEWEB)

    Gary D. McGinnis

    2001-12-31

    The research is a laboratory and bench-scale investigation of a system to concentrate and destroy volatile organic compounds (VOCs), including hazardous air pollutants, formed from the drying of wood and the manufacture of wood board products (e.g., particle board and oriented strandboard). The approach that was investigated involved concentrating the dilute VOCs (<500 ppmv) with a physical/chemical adsorption unit, followed by the treatment of the concentrated voc stream (2,000 to 2,500 ppmv) with a biofiltration unit. The research program lasted three years, and involved three research organizations. Michigan Technological University was the primary recipient of the financial assistance, the USDA Forest Products Laboratory (FPL) and Mississippi State University (MSU) were subcontractors to MTU. The ultimate objective of this research was to develop a pilot-scale demonstration of the technology with sufficient data to provide for the design of an industrial system. No commercialization activities were included in this project.

  20. Using Web Technology to Teach Students about Their Digital World

    Science.gov (United States)

    Braender, Lynn M.; Kapp, Craig M.; Yeras, Jeddel

    2009-01-01

    In the School of Business at The College of New Jersey, students are required to take two courses in Management Information Technology (MIT). All students enroll in the same first course. This course focuses on Emerging Technologies and intermediate level data analysis skills. Students are then free to choose their second course. Each MIT course…

  1. Assessment of the application of acoustic emission technology for monitoring the presence of sand under multiphase flow condition

    Energy Technology Data Exchange (ETDEWEB)

    El-Alej, M., E-mail: m.elalej@cranfield.ac.uk; Mba, D., E-mail: m.elalej@cranfield.ac.uk; Yeung, H., E-mail: m.elalej@cranfield.ac.uk [School of Engineering, Cranfield University, Cranfield, Bedfordshire, MK43 OAL (United Kingdom)

    2014-04-11

    The monitoring of multiphase flow is an established process that has spanned several decades. This paper demonstrates the use of acoustic emission (AE) technology to investigate sand transport characteristic in three-phase (air-water-sand) flow in a horizontal pipe where the superficial gas velocity (VSG) had a range of between 0.2 ms{sup −1} to 2.0 ms{sup −1} and superficial liquid velocity (VSL) had a range of between 0.2 ms{sup −1} to 1.0 ms{sup −1}. The experimental findings clearly show a correlation exists between AE energy levels, sand concentration, superficial gas velocity (VSG) and superficial liquid velocity (VSL)

  2. Trends in OMI NO2 observations over the United States: effects of emission control technology and the economic recession

    Science.gov (United States)

    Russell, A. R.; Valin, L. C.; Cohen, R. C.

    2012-12-01

    Observations of tropospheric NO2 vertical column densities over the United States (US) for 2005-2011 are evaluated using the OMI Berkeley High Resolution (BEHR) retrieval algorithm. We assess changes in NO2 on day-of-week and interannual timescales to assess the impact of changes in emissions from mobile and non-mobile sources on the observed trends. We observe consistent decreases in cities across the US, with an average total reduction of 32 ± 7% across the 7 yr. Changes for large power plants have been more variable (-26 ± 12%) due to regionally-specific regulation policies. An increasing trend of 10-20% in background NO2 columns in the northwestern US is observed. We examine the impact of the economic recession on emissions and find that decreases in NO2 column densities over cities were moderate prior to the recession (-6 ± 5% yr-1), larger during the recession (-8 ± 5% yr-1), and then smaller after the recession (-3 ± 4% yr-1). Differences in the trends observed on weekdays and weekends indicate that prior to the economic recession, NO2 reductions were dominated by technological improvements to the light-duty vehicle fleet but that a decrease in diesel truck activity has contributed to emission reductions since the recession. We use the satellite observations to estimate a 34% decrease in NO2 from mobile sources in cities for 2005-2011 and use that value to infer changes in non-mobile sources. We find that reductions in NO2 from non-mobile sources in cities have been both more modest and more variable than NO2 reductions from mobile sources (-10 ± 13%).

  3. Technology Status and Expected Greenhouse Gas Emissions of Battery, Plug-In Hybrid, and Fuel Cell Electric Vehicles

    Science.gov (United States)

    Lipman, Timothy E.

    2011-11-01

    Electric vehicles (EVs) of various types are experiencing a commercial renaissance but of uncertain ultimate success. Many new electric-drive models are being introduced by different automakers with significant technical improvements from earlier models, particularly with regard to further refinement of drivetrain systems and important improvements in battery and fuel cell systems. The various types of hybrid and all-electric vehicles can offer significant greenhouse gas (GHG) reductions when compared to conventional vehicles on a full fuel-cycle basis. In fact, most EVs used under most condition are expected to significantly reduce lifecycle GHG emissions. This paper reviews the current technology status of EVs and compares various estimates of their potential to reduce GHGs on a fuel cycle basis. In general, various studies show that battery powered EVs reduce GHGs by a widely disparate amount depending on the type of powerplant used and the particular region involved, among other factors. Reductions typical of the United States would be on the order of 20-50%, depending on the relative level of coal versus natural gas and renewables in the powerplant feedstock mix. However, much deeper reductions of over 90% are possible for battery EVs running on renewable or nuclear power sources. Plug-in hybrid vehicles running on gasoline can reduce emissions by 20-60%, and fuel cell EV reduce GHGs by 30-50% when running on natural gas-derived hydrogen and up to 95% or more when the hydrogen is made (and potentially compressed) using renewable feedstocks. These are all in comparison to what is usually assumed to be a more advanced gasoline vehicle "baseline" of comparison, with some incremental improvements by 2020 or 2030. Thus, the emissions from all of these EV types are highly variable depending on the details of how the electric fuel or hydrogen is produced.

  4. Trends in OMI NO2 observations over the US: effects of emission control technology and the economic recession

    Directory of Open Access Journals (Sweden)

    R. C. Cohen

    2012-06-01

    Full Text Available Observations of tropospheric NO2 vertical column densities over the United States (US for 2005–2011 are evaluated using the OMI Berkeley High Resolution (BEHR retrieval algorithm. We assess changes in NO2 on day-of-week and interannual timescales to assess the impact of changes in emissions from mobile and non-mobile sources on the observed trends. We observe consistent decreases in cities across the US, with an average total reduction of 32 ± 7%. Changes for large power plants have been more variable (−26 ± 12% due to regionally-specific regulation policies. An increasing trend of 10–20% in background NO2 columns in the Northwestern US is observed. We examine the impact of the economic recession on emissions and find that decreases in NO2 column densities over cities were moderate prior to the recession (−6 ± 5 % yr−1, larger during the recession (−8 ± 5 % yr−1, and then smaller after the recession (−3 ± 4 % yr−1. Differences in the trends observed on weekdays and weekends indicate that prior to the economic recession, NO2 reductions were dominated by technological improvements to the light-duty vehicle fleet but that a decrease in diesel truck activity has dominated emission reductions since the recession. We use the satellite observations to estimate a 34% decrease in NO2 from mobile sources in cities for 2005–2011 and use that value to infer changes in non-mobile sources. We find that reductions in NO2 from non-mobile sources in cities have been more variable than NO2 reductions from mobile sources (−10 ± 13%.

  5. The technology for creating of decorative plywood with low formaldehyde emission

    Science.gov (United States)

    Safin, R. R.; Khasanshin, R. R.; Shaikhutdinova, A. R.; Ziatdinov, R. R.

    2015-10-01

    The development of new technologies of processing of industrial art products to improve their functional, ergonomic and aesthetic properties is one of the important directions of improvement of product design. The article presents the technology of preliminary contact thermal modification of sheets of veneer in the production of low-toxic decorative plywood and laminated products, which lets significantly improve their water resistance. It has been established that thermal modification of wood material causes a decrease in density with increasing temperature and duration of treatment. A mathematical model describing the process of heat treatment of wood veneer and allowing predicting the degree of thermal modification of wood material depending on the modes of modification has been developed. Several studies to determine the basic properties of plywood made on the basis of heat-treated veneer were conducted in the work. Studies have shown that the thermal effect on veneer in the manufacture of plywood provides improves water-repellent properties of it, while not increasing its toxicity. It has also been found that the alternating of layers of wood with varying degrees of heat treatment when creating laminated products greatly enhances the decorative features of the products.

  6. Integrated Motion Planning and Autonomous Control Technology for Autonomous ISR Project

    Data.gov (United States)

    National Aeronautics and Space Administration — SSCI and MIT propose to design, implement and test a comprehensive Integrated Mission Planning & Autonomous Control Technology (IMPACT) for Autonomous ISR...

  7. Developing an early laekage detection system for thermal power plant boiler tubes by using acoustic emission technology

    Energy Technology Data Exchange (ETDEWEB)

    Lee, Sang Bum [RECTUSON, Co., LTD, Masan (Korea, Republic of); Roh, Seon Man [Samcheonpo Division, Korea South-East Power Co., Samcheonpo (Korea, Republic of)

    2016-06-15

    A thermal power plant has a heat exchanger tube to collect and convert the heat generated from the high temperature and pressure steam to energy, but the tubes are arranged in a complex manner. In the event that a leakage occurs in any of these tubes, the high-pressure steam leaks out and may cause the neighboring tubes to rupture. This leakage can finally stop power generation, and hence there is a dire need to establish a suitable technology capable of detecting tube leaks at an early stage even before it occurs. As shown in this paper, by applying acoustic emission (AE) technology in existing boiler tube leak detection equipment (BTLD), we developed a system that detects these leakages early enough and generates an alarm at an early stage to necessitate action; the developed system works better that the existing system used to detect fine leakages. We verified the usability of the system in a 560 MW-class thermal power plant boiler by conducting leak tests by simulating leakages from a variety of hole sizes (⌀2, ⌀5, ⌀10 mm). Results show that while the existing fine leakage detection system does not detect fine leakages of ⌀2 mm and ⌀5 mm, the newly developed system could detect leakages early enough and generate an alarm at an early stage, and it is possible to increase the signal to more than 18 dB.

  8. Demonstration of SCR technology for the control of NOx emissions from high-sulfur coal-fired utility boilers

    Energy Technology Data Exchange (ETDEWEB)

    Hinton, W.S. [W.S. Hinton and Associates, Cantonment, FL (United States); Maxwell, J.D.; Healy, E.C.; Hardman, R.R. [Southern Company Services, Inc., Birmingham, AL (United States); Baldwin, A.L. [Dept. of Energy, Pittsburgh, PA (United States)

    1997-12-31

    This paper describes the completed Innovative Clean Coal Technology project which demonstrated SCR technology for reduction of flue gas NO{sub x} emissions from a utility boiler burning US high-sulfur coal. The project was sponsored by the US Department of Energy, managed and co-funded by Southern Company Services, Inc. on behalf of the Southern Company, and also co-funded by the Electric Power Research Institute and Ontario Hydro. The project was located at Gulf Power Company`s Plant Crist Unit 5 (a 75 MW tangentially-fired boiler burning US coals that had a sulfur content ranging from 2.5--2.9%), near Pensacola, Florida. The test program was conducted for approximately two years to evaluate catalyst deactivation and other SCR operational effects. The SCR test facility had nine reactors: three 2.5 MW (5,000 scfm), and operated on low-dust flue gas. The reactors operated in parallel with commercially available SCR catalysts obtained from suppliers throughout the world. Long-term performance testing began in July 1993 and was completed in July 1995. A brief test facility description and the results of the project are presented in this paper.

  9. Process systems engineering issues and applications towards reducing carbon dioxide emissions through conversion technologies

    DEFF Research Database (Denmark)

    Roh, Kosan; Frauzem, Rebecca; Gani, Rafiqul

    2016-01-01

    This paper reviews issues and applications for design of sustainable carbon dioxide conversion processes, specifically through chemical conversion, and the integration of the conversion processes with other systems from a process systems engineering (PSE) view-point. Systematic and computer......-aided methods and tools for reaction network generation, processing route generation, process design/optimization, and sustainability analysis are reviewed with respect to carbon dioxide conversion. Also, the relevant gaps and opportunities are highlighted. In addition, the integration of carbon dioxide...... conversion processes with other systems including coexisting infrastructure and carbon dioxide sources is described.Then, the importance of PSE based studies for such application is discussed. Finally, some perspectives on the status and future directions of carbon dioxide conversion technology...

  10. Indian emissions of technology-linked NMVOCs with chemical speciation: An evaluation of the SAPRC99 mechanism with WRF-CAMx simulations

    Science.gov (United States)

    Sarkar, M.; Venkataraman, C.; Guttikunda, S.; Sadavarte, P.

    2016-06-01

    Non-methane volatile organic compounds (NMVOCs) are important precursors to reactions producing tropospheric ozone and secondary organic aerosols. The present work uses a detailed technology-linked NMVOC emission database for India, along with a standard mapping method to measured NMVOC profiles, to develop speciated NMVOC emissions, which are aggregated into multiple chemical mechanisms used in chemical transport models. The fully speciated NMVOC emissions inventory with 423 constituent species, was regrouped into model-ready reactivity classes of the RADM2, SAPRC99 and CB-IV chemical mechanisms, and spatially distributed at 25 × 25 km2 resolution, using source-specific spatial proxies. Emissions were considered from four major sectors, i.e. industry, transport, agriculture and residential and from non-combustion activities (use of solvents and paints). It was found that residential cooking with biomass fuels, followed by agricultural residue burning in fields and on-road transport, were largest contributors to the highest reactivity group of NMVOC emissions from India. The emissions were evaluated using WRF-CAMx simulations, using the SAPRC99 photochemical mechanism, over India for contrasting months of April, July and October 2010. Modelled columnar abundance of NO2, CO and O3 agreed well with satellite observations both in magnitude and spatial distribution, in the three contrasting months. Evaluation of monthly and spatial differences between model predictions and observations indicates the need for further refinement of the spatial distribution of NOX emissions, spatio-temporal distribution of agricultural residue burning emissions.

  11. Technical and economic investigation of the combined transport of district heat and refuse by rail. Final report; Technische und wirtschaftliche Untersuchung des kombinierten Transportes von Fernwaerme und Muell mit der Bahn (KTFM). Schlussbericht

    Energy Technology Data Exchange (ETDEWEB)

    Schleyer, A. [GEF Ingenieurgesellschaft fuer Energietechnik und Fernwaerme mbH, Leimen (Germany); Krebs, A.W. [Regional- und Energieplanung Andreas W. Krebs, Frankfurt am Main (Germany); Goeddeke, H. [Ingenieurbuero fuer Rationellen Energieeinsatz und Technologietransfer, Boppard (Germany)

    1993-03-01

    In past years a number of preliminary studies have been done on ``District Heat Transport by Rail``: they have not, however, answered the question of economic viability. The main task of this study is to see if district heat transport by rail (possibily in combination with refuse transport) can be done economically. The aim of the investigation was to assess the chances of realisation of a combination of different technologies which appeared economically and environmentally sound. With this in mind, the technical, economical and ecological aspects of the ``Combined Transport of District Heat and Refuse`` by rail were investigated. The main findings are as follows: The sum of emissions in built-up areas can thus be reuced. Within the present price structure of the German rail system, the combined transport of district offers no price advantage over separate transport. Cheaper transport could be achieved if private rail companies were allowed to transport district heat and refuse on DB and DR track and pay toll. Although the concept is ecologically desirable, we sadly must conclude that heating costs for this concept would greatly exceed acceptable limits. On the other hand, politicak changes, e.g. the compulsion for heat generation from incinerators, mith lead to increased costs for district heat supply. (orig.) [Deutsch] Zum Thema ``Fernwaermetransport mit der Eisenbahn`` sind in den vergangenen Jahren bereits verschiedene Voruntersuchungen durchgefuehrt worden, wobei aber bisher die Frage der Wirtschafftlichkeit unbeantwortet blieb. Vordringliche Aufgabe dieser Studie ist es daher, zu erklaeren, ob der Fernwaermetransport mit der Eisenbahn (evtl. in Verbindung mit Muelltransporten) wirtschaftlich durchgefuehrt werden kann. Ziel dieses Forschungsvorhabens war es, die Realisierungschancen einer gesamtwirtschaftlich sinnvoll und umweltfreundlich erscheinenden Verbindung verschiedener Techniken zu ermitteln. Dazu sollte der ``Kombinierte Transport von Fernwaerme und

  12. Alcohol-fueled vehicles: An alternative fuels vehicle, emissions, and refueling infrastructure technology assessment

    Energy Technology Data Exchange (ETDEWEB)

    McCoy, G.A.; Kerstetter, J.; Lyons, J.K. [and others

    1993-06-01

    Interest in alternative motor vehicle fuels has grown tremendously over the last few years. The 1990 Clean Air Act Amendments, the National Energy Policy Act of 1992 and the California Clean Air Act are primarily responsible for this resurgence and have spurred both the motor fuels and vehicle manufacturing industries into action. For the first time, all three U.S. auto manufacturers are offering alternative fuel vehicles to the motoring public. At the same time, a small but growing alternative fuels refueling infrastructure is beginning to develop across the country. Although the recent growth in alternative motor fuels use is impressive, their market niche is still being defined. Environmental regulations, a key driver behind alternative fuel use, is forcing both car makers and the petroleum industry to clean up their products. As a result, alternative fuels no longer have a lock on the clean air market and will have to compete with conventional vehicles in meeting stringent future vehicle emission standards. The development of cleaner burning gasoline powered vehicles has signaled a shift in the marketing of alternative fuels. While they will continue to play a major part in the clean vehicle market, alternative fuels are increasingly recognized as a means to reduce oil imports. This new role is clearly defined in the National Energy Policy Act of 1992. The Act identifies alternative fuels as a key strategy for reducing imports of foreign oil and mandates their use for federal and state fleets, while reserving the right to require private and municipal fleet use as well.

  13. Development of ITM Oxygen Technology for Low-cost and Low-emission Gasification and Other Industrial Applications

    Energy Technology Data Exchange (ETDEWEB)

    Fogash, Kevin [Air Products and Chemicals, Inc., Allentown, PA (United States)

    2017-05-17

    Air Products carried out a scope of work under DOE Award No. DE-FE0012065 “Development of ITM Oxygen Technology for Low-cost and Low-emission Gasification and Other Industrial Applications” with subcontractors Ceramatec, Penn State, and WorleyParsons. The scope of work under this award was aimed at furthering the development of the Ion Transport Membrane (ITM) Oxygen production process toward a demonstration-scale facility known as the Oxygen Development Facility (ODF). Specific activities will help to enable design and construction of the ODF through advancement of a number of challenging technical elements that are required to manage risk in the initial deployment of ITM technology. Major objectives of the work included developing ITM Oxygen ceramic membrane materials with improved performance and reliability, optimizing ceramic module geometry and fabrication methods, testing module performance, trialing the improved fabrication process at commercial scale in the Ceramic Membrane Module Fabrication Facility (CerFab), and advancing engineering development of the ITM oxygen production process, including vessel design and contaminant control measures to prepare for deployment of the ODF. The comprehensive report that follows details the team’s work, which includes several notable accomplishments: 1) compressive creep, a likely limiter of ceramic module lifetime in service, was demonstrated to be retarded by an order of magnitude by changes in material formulation, module joining dimensions, and internal wafer geometry; 2) two promising new materials were shown to be superior to the incumbent ITM material in a key material parameter related to oxygen flux; 3) module degradation mechanisms were identified following operation in large pilot-scale equipment; 4) options for utilizing ITM in a coal-to-liquids (CTL) facility to enable liquids production with carbon capture were identified and studied; and 5) the benefits of potential improvements to the technology

  14. Investigations of the causes of hydrocarbon emissions in spark ignition engines with homogeneous charge compression ignition (HCCI). A report of the Institute for Internal Combustion Engines and Automotive Engineering, TU Vienna (IVK); Untersuchung der Ursachen fuer Kohlenwasserstoff-Emissionen beim Ottomotor mit homogener Selbstzuendung (HCCI). Bericht des Instituts fuer Verbrennungskraftmaschinen und Kraftfahrzeugbau derTechnischen Universitaet Wien (IVK)

    Energy Technology Data Exchange (ETDEWEB)

    Geringer, B. (ed.) [Technische Univ., Vienna (Austria); Loch, A.

    2007-07-01

    The main aim of research and development in the field of internal combustion engine is to create an engine with low fuel consumption and hence low carbon dioxide emissions to meet future emissions regulations as well as providing a good driving experience. Homogeneous charge compression ignition (HCCI) is an alternative combustion process being currently developed that promises a good fuel consumption rate and low nitrogen oxide emissions for the gasoline engine. The only legally restricted exhaust gas emissions for this combustion process are carbon monoxide (CO) and hydrocarbons (HC). The aim of this research was a better understanding of the causes and sources of hydrocarbon emissions with HCCI using gasoline so as to further reduce hydrocarbon emissions. A description of the HCCI combustion process is followed by a list of the known sources of hydrocarbon emission in conventional gasoline engines and current knowledge of the causes of hydrocarbon emission with HCCI. It is assumed that many of the known causes of hydrocarbon emissions in the conventional gasoline combustion process are the same for HCCI. For this reason, this study focused on combustion and carburation, which is where the combustion processes differ the most. (orig.)

  15. Demenz und Depression bei Patienten mit idiopathischem Parkinson-Syndrom

    Directory of Open Access Journals (Sweden)

    Herting B

    2007-01-01

    Full Text Available Das idiopathische Parkinson-Syndrom (IPS ist eine progressive neurodegenerative Erkrankung mit motorischen und nicht-motorischen Symptomen. Bei Patienten mit IPS sind kognitive Defizite und Demenzen mit einer Prävalenz von 20–40 % nachgewiesen worden. Risikofaktoren für das Auftreten einer Parkinson-Demenz (PDe sind hohes Alter bei Krankheitsbeginn, schwere und/oder beidseitige motorische Symptomatik, Verwirrtheitszustände unter Levodopa-Medikation, aber auch Demenzerkrankungen in der Familie und niedriges Bildungsniveau. Patienten mit PDe weisen eine erhöhte Morbidität und Mortalität im Vergleich zu Patienten mit IPS ohne Demenz und der altersgleichen Normalbevölkerung auf, die unabhängig von der Schwere der motorischen Einbußen zweifach erhöht ist. Die Depression ist das häufigste psychiatrische Symptom beim IPS (die Angaben zur Prävalenz schwanken zwischen 4 % und 70 % und beeinflußt neben den Aktivitäten des täglichen Lebens wesentlich die Lebensqualität der Betroffenen. Darin liegt auch die Herausforderung, kognitive und affektive Symptome effizient zu behandeln.

  16. Pellet as a Technological Nutrient within the Circular Economy Model: Comparative Analysis of Combustion Efficiency and CO and NOx Emissions for Pellets from Olive and Almond Trees

    Directory of Open Access Journals (Sweden)

    Valentín Molina-Moreno

    2016-09-01

    Full Text Available This study analyzes the operation of Biomass System (BIO System technology for the combustion of pellets from almond and olive trees within the circular economy model. Its aims are the reduction of greenhouse gas emissions as well as waste removal and its energy use by reintroducing that waste into the production process as technological nutrient. In order to do so, combustion efficiency under optimal conditions at nominal power was analyzed. In addition, a TESTO 350-XL analyzer was employed to measure CO and NOx emissions. High combustion efficiency values were obtained, 87.7% and 86.3%, for pellets from olive tree and almond tree, respectively. The results of CO and NOx emission levels were very satisfactory. Under conditions close to nominal power, CO emission levels were 225.3 ppm at 6% O2 for pellet from almond tree and 351.6 ppm at 6% O2 for pellet from olive tree. Regarding NOx emissions, the values were 365.8 ppm at 6% O2 and 333.2 ppm at 6% O2 for pellets from almond tree and olive tree, respectively. In general, these values were below those legally established by current legislation in European countries. Therefore, BIO System technology is a perfectly feasible option in terms of energy use and circular economy.

  17. The Berkeley High spatial Resolution (BEHR) OMI NO2 retrieval: Effects of emission control technology and the economic recession over the U.S.

    Science.gov (United States)

    Cohen, R. C.; Russell, A. R.; Valin, L. C.

    2012-12-01

    We describe the Berkeley High Spatial Resolution OMI NO2 retrieval and analyses of trends in urban and rural locations in the U.S. based on that retrieval. The role of catalytic convertors and other emission control technologies and the global recession of the last 5 years will be assessed.

  18. Islam, Migration und Integration: Konflikte jugendlicher Migranten mit islamischem Hintergrund

    Directory of Open Access Journals (Sweden)

    Ilhan Kizilhan

    2008-04-01

    Full Text Available Der Islam mit seinen verschiedenen Verhaltensweisen und Verboten spielt direkt oder indirekt immer noch eine wichtige Rolle im alltäglichen Leben vieler Migranten. Religiöse Vorschriften zeichnen sich dadurch aus, dass ihrer Achtung nicht juristisch, sondern durch sozialen Druck Nachdruck verliehen wird (Verwandtschaft, religiöse Lehrer, islamische Gemeinde, religiöse Vereine etc. und dass ihre Missachtung mit Folgen in Form von Ausgrenzung, Missachtung und Diskriminierung einhergeht. Die kulturellen Vorstellungen der ersten Generation unterscheiden sich auf Grund der unterschiedlichen Biografien von denen der zweiten und dritten durch den Grad der Verwurzelung in der kulturellen Identität und der Verbundenheit mit traditionellen Wertvorstellungen. Fehlende Integrationskonzepte, Ausgrenzung im Migrationsland auf der einen und weltweite staatliche und halbstaatliche Konflikte im Namen des Islams bis hin zum Terrorismus auf der anderen Seite haben einen erheblichen Einfluss auf den Integrationsgrad von jugendlichen Migranten im Aufnahmeland.

  19. Professionell entwickeln mit Java EE 7 das umfassende Handbuch

    CERN Document Server

    Salvanos, Alexander

    2014-01-01

    Ein praxisorientiertes Lehrbuch zur JEE 7 und zugleich ein Standardwerk, das Sie auf Ihrem Weg zum Enterprise-Entwickler begleitet. Inklusive Best Practices für leichtgewichtige Enterprise Applications, Standards zu servicebasierten Anwendungen, Persistence API, Dependency Injection, HTML5 und Performance-Tuning. Aus dem Inhalt: Grundlagen und Installation Software-Architektur mit Java EE Webanwendungen mit HTML5 und CSS3 Java Standard Tag Library Asynchrone Servlets und Non-blocking I/O Datenbanken anbinden mit der JDBC API Java Server Faces Datenbank-Organisation Java Persistence API Objektrelationales Mapping Transaktionssicherheit Performance-Tuning Internationalisierung Enterprise Java Beans WebSockets PrimeFaces Deployment Galileo Press heißt von jetzt an Rheinwerk Verlag.

  20. EOP MIT General Circulation Model (MITgcm)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This data contains a regional implementation of the Massachusetts Institute of Technology general circulation model (MITgcm) at a 1-km spatial resolution for the...

  1. JV Task 107- Pilot-Scale Emission Control Technology Testing for Constellation Energy

    Energy Technology Data Exchange (ETDEWEB)

    Michael Jones; Brandon Pavlish; Stephen Sollom; John Kay

    2007-06-30

    An Indonesian, Colombian, and Russian coal were tested in the Energy & Environmental Research Center's combustion test facility for their performance and an evaluation of mercury release and capture with selected additives in both electrostatic precipitator and baghouse configurations. Sorbents included the carbon-based materials NORIT DARCO Hg, Sorbent Technologies B-PAC and B-PAC LC, STI Rejects provided by Constellation Energy, and Envergex e-Sorb, along with ChemMod's high-temperature additive. Each coal was evaluated over several days and compared. Ash-fouling tests were conducted, and mercury levels were monitored using continuous mercury monitors (CMMs). The Ontario Hydro mercury sampling method was also utilized. The Indonesian coal had the lowest ash content, lowest sulfur content, and lowest energy content of the three coals tested. The Colombian coal had the highest mercury content and did contain a significant level of selenium which can interfere with the ability of a CMM to monitor mercury in the gas stream. All sorbents displayed very favorable results. In most cases, mercury removal greater than 86% could be obtained. The Indonesian coal displayed the best mercury removal with sorbent addition. A maximum removal of 97% was measured with this coal using Envergex's carbon-based sorbent at a rate of 4 lb/Macf across an electrostatic precipitator. The high ash and selenium content of the Colombian coal caused it to be a problematic fuel, and ash plugging of the test furnace was a real concern. Problems with the baghouse module led to limited testing. Results indicated that native capture across the baghouse for each coal type was significant enough not to warrant sorbent addition necessary. The fouling potential was the lowest for the Indonesian coal. Low sulfur content contributes to the poor potential for fouling, as witnessed by the lack of deposits during testing. The Russian and Colombian coals had a much higher potential for fouling

  2. „Schloss mit der Debatte!“?

    OpenAIRE

    Birkholz, Tim

    2008-01-01

    Am 19. Januar 2006 beschloss der Deutsche Bundestag mit überwältigender Mehrheit den Abriss des Palastes der Republik. Kurz darauf wurde auf dem Schlossplatz im historischen Zentrum von Berlin mit dem Abtragen des in der Ära Honecker errichteten Gebäudes begonnen. In ähnlicher Deutlichkeit war bereits die Rekonstruktion des Berliner Schlosses beschlossen worden, welches zuvor an gleicher Stelle stehend von der DDR-Regierung unter Walter Ulbricht abgerissen worden war. Die Mehrheitsverhältniss...

  3. Fallstudie SIG - Supply Chain Prototyp mit Coca Cola Beverages

    OpenAIRE

    Senger, Enrico

    2003-01-01

    SIG, ein führender Lieferant von Verpackungsmaterialien für Getränke, hat mit Coca Cola CPFR, collaborative planning, forecasting and replenishment realisiert. Das Unternehmen kann elektronisch und ohne Zeitverzug (vorher mit bis zu 15 Tagen Verspätung) auf die Lagerbestände und Verkaufsvorhersagen bei Coca Cola zugreifen. Coca Cola erhält die exakten Liefermengen und zeiten. Coca Cola konnte dadurch den Lagerbestand von Verpackungsmaterial um 50% senken. Dies reduziert die Bearbeitungszeit d...

  4. Fallstudie SIG - Supply Chain Prototyp mit Coca Cola Beverages

    OpenAIRE

    Senger, Enrico

    2003-01-01

    SIG, ein führender Lieferant von Verpackungsmaterialien für Getränke, hat mit Coca Cola CPFR, collaborative planning, forecasting and replenishment realisiert. Das Unternehmen kann elektronisch und ohne Zeitverzug (vorher mit bis zu 15 Tagen Verspätung) auf die Lagerbestände und Verkaufsvorhersagen bei Coca Cola zugreifen. Coca Cola erhält die exakten Liefermengen und zeiten. Coca Cola konnte dadurch den Lagerbestand von Verpackungsmaterial um 50% senken. Dies reduziert die Bearbeitungszeit d...

  5. Modern engine management using neuronal nets; Modernes Motormanagement mit Neuronalen Netzen

    Energy Technology Data Exchange (ETDEWEB)

    Mueller, R.O.

    1998-07-01

    The author focuses on the theoretical analysis, description and extension of neuronal control technology and its applications in engine management. Definitions and methods are presented for forward and recurrent nets. The fundamentals of control technology are described, and neuronal methods for modelling and control are presented. The first part of the report ends with a stability calculation which leads to the extension of existing learning methods. The second part discusses neuronal methods in the control of an external combustion engine. The investigated engine system is described, the combustion process is analyzed, and the fundamentals of engine management are presented. Ignition point and momentum control are presented as examples to illustrate the applicability of neuronal methods. [German] Das Ziel der vorliegenden Arbeit war die theoretische Aufarbeitung, Darstellung und Erweiterung der neuronalen Regelungstechnik und ihre moegliche Anwendung im Motormanagement. Im grundlagenorientierten Teil wurden zuerst die wichtigsten Definitionen und Verfahren fuer vorwaertsgekoppelte und rekurrente Netze praesentiert. Anschliessend folgte eine kurze Einfuehrung in die Regelungstechnik, bevor ausfuehrlich verschiedene Methoden zur neuronalen Modellierung und Regelung vorgestellt wurden. Der erste Teil der Arbeit endete mit einer Stabilitaetsbetrachtung und einer darauf aufbauenden Erweiterung der bestehenden Lernverfahren. Der zweite Teil beschaeftigte sich mit der Anwendung der neuronalen Methoden in der Steuerung eines Verbrennungsmotors. Zur Motivation wurde das betrachtete System genau beschrieben, die Verbrennung analysiert und die Grundlagen des Motormanagements vorgestellt. Beispielhaft wurden im letzten Kapitel die Zuendzeitpunkt- und die Momentenregelung herausgegriffen und an ihnen die Anwendbarkeit der neuronalen Verfahren aufgezeigt. (orig.)

  6. Pump-turbines with constant flow direction; Pumpenturbinen mit gleicher Durchstroemrichtung

    Energy Technology Data Exchange (ETDEWEB)

    Mollenkopf, G. [Zentrale Forschung Engineering, KSB AG, Frankenthal (Germany)

    1997-12-31

    This research project was sponsored by the federal ministry of science and technology BMFT (product owner: New Materials and Chemical Technologies - NMT). Its aim was to develop a novel unit that can work both as a pump and a turbine with a constant flow direction through internal blade adjustment. This specifically high-speed pump-turbine is suited for plants where a liquid in one case needs to be hauled against a rising pressure and where, in another case, there is a pressure drop in the same direction. So far, either a separate pump and turbine each are used which are temporarily stopped, involving corresponding effort, or - almost as a rule - the turbine is dispensed with, so that the energy locked up in the pressure drop goes unused. (orig.) [Deutsch] Die Zielsetzung unseres Forschungsvorhabens, das vom BMFT (Produkttraeger: Neue Materialien und Chemische Technologien - NMT) gefoerdert wird, war die Entwicklung eines neuartigen Aggregats, das durch interne Schaufelverstellung in der Lage ist, sowohl als Pumpe als auch als Turbine mit gleichbleibender Durchstroemrichtung zu arbeiten. Diese spezifisch schnellaeufige Pumpturbine kommt fuer Anlagen in Frage, in denen eine Fluessigkeit im einen Fall gegen einen anstehenden Druck gefoerdert werden muss und im anderen Fall in gleicher Richtung ein Druckgefaelle zur Verfuegung steht. Entweder werden bisher getrennt aufgestellte Pumpen und Turbinen mit zeitweisem Stillstand und entsprechendem Aufwand eingesetzt oder es wird - fast in der Regel - auf die Turbine und damit auf die im Druckgefaelle enthaltene Energie verzichtet. (orig.)

  7. The new German Electrosmog Ordinance. 26th Ordinance for implementation of the German Federal Emission Control Act (Ordinance on protection against electromagnetic fields - 26th BImSchV), as of 16 December 1996. Edition comprising explanations, legislative text, and statement of legislative intent; Die neue Elektrosmog-Verordnung. Sechsundzwanzigste Verordnung zur Durchfuehrung des Bundes-Immissionsschutzgesetzes (Verordnung ueber elektromagnetische Felder - 26. BImSchV) vom 16. Dezember 1996. Ausgabe mit Erlaeuterungsteil, Verordnungstext und amtlicher Begruendung

    Energy Technology Data Exchange (ETDEWEB)

    Kemmer, W.

    1997-10-01

    This Ordinance is the first of its kind in the Federal Republic of Germany, establishing legally binding limiting values for electromagnetic fields emanating from low-frequency and high-frequency systems. The Ordinance is based on the internationally accepted restrictions published by the International Commission for Protection From Non-Ionizing Radiation (ICNIRP). The Ordinance relates exclusively to commercial systems, as e.g. radio and radar systems in the range from 10 to 300 000 Megahertz, and high-voltage systems and electric railway systems in the range up to 50 Hertz. In compliance with the Ordinance, operation of these systems must not exceed the regulatory limits in buildings and places destined to accommodate people for time periods exceeding a temporary stay. The Ordinance is of particular significance against the background of the rapidly developing telecommunications market. Passing the 26th ordinance for implementation of the German Emission Control Act (26th BImSchV), the Federal Government has taken the lead in legislation in this field in Europe. Germany is the first country in Europe to have established regulatory provisions of the scope and legal effect of the German Ordinance, there is no comparable provision to date even at EU level. (orig./AJ) [Deutsch] Erstmals hat der Bundesgesetzgeber eine Verordnung zur Festlegung von Grenzwerten fuer elektromagnetische Felder der Nieder- und Hochfrequenz erlassen. Als Grundlage dienten die weltweit anerkannten Werte der Internationalen Kommission zum Schutz vor nichtionisierenden Strahlen (ICNIRP). Die Verordnung bezieht sich allerdings nur auf Anlagen, die gewerblichen Zwecken dienen. Hierzu gehoeren Sende- und Radareinrichtungen im Bereich von 10 bis 300 000 Megahertz und Hochspannungsanlagen und Bahnstromanlagen im Bereich bis 50 Hertz. Diese Anlagen sind so zu betreiben, dass die Grenzwerte der Verordnung in Gebaeuden und auf Grundstuecken, die zum nicht nur voruebergehenden Aufenthalt von Menschen

  8. Development of ITM Oxygen Technology for Low-cost and Low-emission Gasification and Other Industrial Applications

    Energy Technology Data Exchange (ETDEWEB)

    Armstrong, Phillip

    2014-11-01

    Air Products is carrying out a scope of work under DOE Award No. DE-FE0012065 “Development of ITM Oxygen Technology for Low-cost and Low-emission Gasification and Other Industrial Applications.” The Statement of Project Objectives (SOPO) includes a Task 4f in which a Decision Point shall be reached, necessitating a review of Tasks 2-5 with an emphasis on Task 4f. This Topical Report constitutes the Decision Point Application pertaining to Task 4f. The SOPO under DOE Award No. DE-FE0012065 is aimed at furthering the development of the Ion Transport Membrane (ITM) Oxygen production process toward a demonstration scale facility known as the Oxygen Development Facility (ODF). It is anticipated that the completion of the current SOPO will advance the technology significantly along a pathway towards enabling the design and construction of the ODF. Development progress on several fronts is critical before an ODF project can commence; this Topical Report serves as an early update on the progress in critical development areas. Progress was made under all tasks, including Materials Development, Ceramic Processing Development, Engineering Development, and Performance Testing. Under Task 4f, Air Products carried out a cost and performance study in which several process design and cost parameters were varied and assessed with a process model and budgetary costing exercise. The results show that the major variables include ceramic module reliability, ITM operating temperature, module production yield, and heat addition strategy. High-temperature compact heat exchangers are shown to contribute significant cost benefits, while directly firing into the feed stream to an ITM are even a mild improvement on the high-temperature recuperation approach. Based on the findings to-date, Air Products recommends no changes to the content or emphasis in the current SOPO and recommends its completion prior to another formal assessment of these factors.

  9. Determination of the uncertainties of air pollutant emissions of land bound traffic in Germany, computed with the models TREMOD and TREMOD MM; Ermittlung der Unsicherheiten der mit den Modellen TREMOD und TREMOD-MM berechneten Luftschadstoffemissionen des landgebundenen Verkehrs in Deutschland

    Energy Technology Data Exchange (ETDEWEB)

    Knoerr, Wofram [ifeu - Institut fuer Energie- und Umweltforschung Heidelberg gGmbH, Heidelberg (Germany); Heldstab, Juerg; Kasser, Florian; Keller, Mario [INFRAS, Zuerich (Switzerland)

    2010-05-15

    Germany is obligated to the implementation of emission inventories for climatic gases and air pollutants. This requires the proof and documentation of the data quality and uncertainties. In the project under consideration the uncertainties of the ZSE data records (ZSE = central system emissions) of the source groups road traffic, rail traffic, inland navigation traffic and residual traffic of the emission inventory are to be determined for all fuel methods, greenhouse gases and air pollutants. The basis of the ZSE data records are the programs TREMOD and TREMOD MM as well as the sales figures of fuels. Provisional results of the actual mineral oil statistics, updated road performances and stocks of vehicles as well as the actual emission factor data base of traffic are used as a fundament for the determination of uncertainties.

  10. Combined effects of ozone and other air pollutants, especially allergens; Kombinationswirkung von Ozon mit anderen Luftschadstoffen, insbesondere mit Allergenen

    Energy Technology Data Exchange (ETDEWEB)

    Nowak, D. [Muenchen Univ. (Germany). Inst. fuer Arbeits- und Umweltmedizin; Joerres, R.; Magnussen, H. [Krankenhaus Grosshansdorf (Germany). Zentrum fuer Pneumologie und Thoraxchirurgie

    2000-07-01

    Ozone effects in humans may either be examined in epidemiological or in clinical exposure studies. In the natural environment ozone does not occur alone but only in combination with other noxious agents. The present summary gives an overview of the literature on combined effects of ozone and allergens. [German] Ozoneffekte auf den Menschen koennen zum einen in epidemiologischen, zum anderen in klinischen Expositionsstudien untersucht werden. In der natuerlichen Umwelt des Menschen tritt Ozon nicht allein auf, sondern mit anderen Noxen kombiniert. Die vorliegende Zusammenfassung ist eine Literaturuebersicht ueber die Kombinationswirkung von Ozon mit Allergenen. (orig.)

  11. Carbon nanotubes, a megatrend in materials engineering with good application prospects; Carbon Nanotubes. Megatrend der Werkstofftechnologie mit aussichtsreichen Anwendungsperspektiven

    Energy Technology Data Exchange (ETDEWEB)

    Hoffschulz, Holger [Bayer Technology Services GmbH, Leverkusen (Germany). Process Technology - Innovation Management; Krueger, Peter [Bayer MaterialScience AG (Germany). Business Unit Coatings, Adhesives and Specialities

    2009-10-15

    Carbon nanotubes (CNT) are an international megatrend with fascinating perspectives. CNTs can improve the mechanical, electronic and thermal properties of materials significantly and have the potential to produce novel materials and products that cannot be achieved with conventional technologies. In Germany, a close-meshed research association has been founded by about 80 renowned partners of science, small business and industry to generate a basis for a leading market for this material. The initiative will bridge the gap between innovative technology and practical applications. In 18 projects, innovative applications will be developed in the fields of energy, environment, mobility, and lightweight construction. (orig.) [German] Carbon Nanotubes (CNT) sind weltweit ein Megatrend der Werkstofftechnologie mit faszinierenden Perspektiven. CNTs koennen dazu beitragen, die mechanischen, elektronischen und thermischen Eigenschaften von Werkstoffen grundlegend zu verbessern und haben das Potenzial, voellig neue Werkstoffe und Produkte hervorzubringen, die mit bisheriger Technologie nicht realisierbar sind. In Deutschland hat sich kuerzlich ein eng vernetzter Forschungsverbund mit rund 80 namhaften Partnern aus Wissenschaft, Mittelstand und Grossindustrie zusammen gefunden, um die Basis fuer einen Leitmarkt fuer diesen Werkstoff zu legen. Die Initiative schlaegt eine Bruecke zwischen wegweisender Technologie und praxisnahen Anwendungen und entwickelt in 18 Projekten innovative Applikationen auf den Gebieten Energie/Umwelt, Mobilitaet sowie Leichtbau. (orig.)

  12. MIT Experiments with Joint Venture Contract.

    Science.gov (United States)

    American School and University, 1981

    1981-01-01

    A new dormitory at Massachusetts Institute of Technology was constructed using a joint venture contract with safeguards and incentives that brought university, architect, and building contractor into a closer and more productive relationship than under conventional contract arrangements. (Author/MLF)

  13. MIT Experiments with Joint Venture Contract.

    Science.gov (United States)

    American School and University, 1981

    1981-01-01

    A new dormitory at Massachusetts Institute of Technology was constructed using a joint venture contract with safeguards and incentives that brought university, architect, and building contractor into a closer and more productive relationship than under conventional contract arrangements. (Author/MLF)

  14. MIT Adopts a Quiet Global Strategy

    Science.gov (United States)

    Fischer, Karin

    2012-01-01

    Back in the 1960s and 1970s, the Massachusetts Institute of Technology was in the university-building business. The elite institute is back in the university-building business. In addition to the thousands of faculty research collaborations around the globe, the university over the past five years has once more engaged in ambitious efforts to…

  15. Wie ich mich mit dem äthiopischen Regime anlegte

    DEFF Research Database (Denmark)

    Hagmann, Tobias

    2016-01-01

    Als Forscher und Kritiker der äthiopischen Politik habe ich viel über das Verhältnis gelernt, in dem Wahrheit und Macht, aber auch Moral und persönliche Interessen zueinander stehen. In den Niederungen der Realpolitik wird mit harten Bandagen um die Deutungshoheit gekämpft wird. Auch Wissenschafter...

  16. MIT Laboratory for Computer Science Progress Report 27

    Science.gov (United States)

    1990-06-01

    C. Waldspurger B. Gates M. Williams Undergraduate Students M. Levine A. Rhee V. Nicotina M. Sexton C. Poelman R. Stata Support Staff A. Rubin 113...Science, May 1990. [5] V. Nicotina . Implementing Mobile Guardians in Argus. Bachelor’s thesis, MIT Department of Electrical Engineering and Computer Science

  17. Numerische Berechnung von Wirbelstromproblemen mit der Cell-Methode

    Directory of Open Access Journals (Sweden)

    K. Frenner

    2006-01-01

    Full Text Available In dieser Arbeit wird die Cell-Methode auf die quasistatischen Maxwellgleichungen angewendet. Dabei werden für die notwendige Transformation vom Primärgitter auf das duale Gitter reziproke Basisvektoren verwendet. Anhand der Felddiffusion der magnetischen Induktion in einen zylindrischen Leiter werden Ergebnisse der Cell-Methode mit einer analytischen Vergleichsrechnung präsentiert.

  18. Interaktion mit RFID Ausleih- und Rückgabeautomaten

    DEFF Research Database (Denmark)

    Greifeneder, Elke; Heyroth, Melanie; Klingbeil, Karin

    2011-01-01

    Der Artikel untersucht mittels Beobachtung die Interaktion zwischen RFID-Ausleih- und Rückgabeautomaten sowie Bibliotheksbenutzern in vier deutschen Bibliotheken. Die Ergebnisse belegen, dass die Interaktion grundsätzlich funktioniert. Die Benutzer zeigten Gelassenheit und Routine im Umgang mit den...

  19. The Creation of OpenCourseWare at MIT

    Science.gov (United States)

    Abelson, Hal

    2008-01-01

    This paper traces the genesis of the MIT OpenCourseWare project from its initial strategic precursors in 1999 and 2000, through its launch in 2001 and its subsequent evolution. The story told here illuminates the interplay among institutional leadership, and strategic planning, and with university culture in launching major educational technology…

  20. MIT CSAIL and Lincoln Laboratory Task Force Report

    Science.gov (United States)

    2016-08-01

    operational capabilities. DARPA has used Challenge Events (2004/2005 Grand Challenge, 2007 Urban Challenge, 2012–15 DRC) to focus and accelerate...Atmospheric and Planetary Sciences EECS Electrical Engineering and Computer Science, MIT FHC Fully Homomorphic Computing FPGA Field-Programmable Gate Array

  1. Interaktion mit RFID Ausleih- und Rückgabeautomaten

    DEFF Research Database (Denmark)

    Greifeneder, Elke; Heyroth, Melanie; Klingbeil, Karin

    2011-01-01

    Der Artikel untersucht mittels Beobachtung die Interaktion zwischen RFID-Ausleih- und Rückgabeautomaten sowie Bibliotheksbenutzern in vier deutschen Bibliotheken. Die Ergebnisse belegen, dass die Interaktion grundsätzlich funktioniert. Die Benutzer zeigten Gelassenheit und Routine im Umgang mit den...

  2. Die Last mit der Lust The burden of lust

    Directory of Open Access Journals (Sweden)

    Lutz Sauerteig

    2004-03-01

    Full Text Available Robert Jütte legt mit Lust ohne Last eine umfassende, allgemeinverständliche und spannend zu lesende Geschichte der Empfängnisverhütung von der Antike bis in die unmittelbare Gegenwart vor.In Lust without Burden, Robert Jütte has written a comprehensive, accessible and gripping history of contraception from antiquity to the present.

  3. Acid emissions from conventional power stations. Pt. 2. Illustrated by the example of a heavy fuel oil-fired power plant unit with flue gas cleaning plant; Saure Emissionen aus konventionellen Kraftwerken. T. 2. dargestellt am Beispiel eines schweroelbefeuerten Kraftwerksblockes mit Rauchgasreinigungsanlagen (RRA)

    Energy Technology Data Exchange (ETDEWEB)

    Kleffner, W. [Bayernwerk AG, Muenchen (Germany)

    1998-04-01

    Part 1 reported on experiments aimed at preventing the frequent discharge of acid droplets and particles from the chimney of Ingolstadt power station of Bayernwerk AG, fired by fuel oil S (up to 3.3% sulphur). Sulphuric acid, which is not separated to the same extent as SO{sub 2} in the flue gas cleaning plant, was recognised as the cause of the discharges. The brick chimney was regarded as the source of the discharges. Those discharges have been prevented for more than three years by individual operational measures and - substantially - by the installation of a pipe of glass fibre reinforced plastic. The paper describes the design of the brick and renovated chimney. During the total rehabilitation period of ten weeks, a new flue gas pipe, resistant to temperatures up to and exceeding 180 C, comprising 465 glass fibre reinforced plastic chambers, 228 ring segments, 7 belt compensators and about 1700 connection laminates, has been pulled, on site, into the existing brickwork piping. (orig.) [Deutsch] Im Teil 1 wurde ueber Versuche berichtet, haeufige Auswuerfe von sauren Tropfen und Partikeln aus dem Schornstein des Kraftwerks Ingolstadt der Bayernwerk AG, befeuert mit Heizoel-S (bis zu 3,3% Schwefel), zu vermeiden. Als Auswurfursache wurde Schwefelsaeure erkannt, die in der Rauchgasreinigungsanlage nicht in gleicher Hoehe wie SO{sub 2} abgeschieden wird. Als Quelle der Auswuerfe war der gemauerte Schornstein anzusehen. Die genannten Auswuerfe werden seit mehr als drei Jahren durch einzelne betriebliche Massnahmen und - wesentlich - durch den Einbau einer Roehre aus glasfaserverstaerktem Kunstoff (GFK) vermieden. Die Konstruktion des gemauerten und des sanierten Schornsteins wird dargestellt. Waehrend der insgesamt zehnwoechigen Sanierungszeit wurde vor Ort eine neue, bis ueber 180 C temperaturbestaendige Rauchgasroehre, bestehend aus 465 GFK-Kassetten, 228 Ringsegmenten, sieben Bandkompensatoren und rund 1700 Verbindungslaminaten, in die weiterhin bestehende

  4. Parallelization experience with four canonical econometric models using ParMitISEM

    NARCIS (Netherlands)

    Baştürk, N.; Grassi, S.; Hoogerheide, L.; van Dijk, H.K.

    2016-01-01

    This paper presents the parallel computing implementation of the MitISEM algorithm, labeled Parallel MitISEM. The basic MitISEM algorithm, introduced by Hoogerheide et al. (2012), provides an automatic and flexible method to approximate a non-elliptical target density using adaptive mixtures of

  5. Parallelization experience with four canonical econometric models using ParMitISEM

    NARCIS (Netherlands)

    Bastürk, Nalan; Grassi, S.; Hoogerheide, L.; van Dijk, Herman K.

    2016-01-01

    This paper presents the parallel computing implementation of the MitISEM algorithm, labeled Parallel MitISEM. The basic MitISEM algorithm provides an automatic and flexible method to approximate a non-elliptical target density using adaptive mixtures of Student-t densities, where only a kernel of

  6. Parallelization Experience with Four Canonical Econometric Models Using ParMitISEM

    NARCIS (Netherlands)

    N. Basturk (Nalan); S. Grassi (Stefano); L.F. Hoogerheide (Lennart); H.K. van Dijk (Herman)

    2016-01-01

    textabstractThis paper presents the parallel computing implementation of the MitISEM algorithm, labeled Parallel MitISEM. The basic MitISEM algorithm, introduced by Hoogerheide, Opschoor and Van Dijk (2012), provides an automatic and flexible method to approximate a non-elliptical target density

  7. Parallelization experience with four canonical econometric models using ParMitISEM

    NARCIS (Netherlands)

    Baştürk, N.; Grassi, S.; Hoogerheide, L.; van Dijk, H.K.

    2016-01-01

    This paper presents the parallel computing implementation of the MitISEM algorithm, labeled Parallel MitISEM. The basic MitISEM algorithm, introduced by Hoogerheide et al. (2012), provides an automatic and flexible method to approximate a non-elliptical target density using adaptive mixtures of Stud

  8. Operating experience with low-NO{sub x} burners in the Netherlands; Betriebserfahrungen mit Low-NO{sub x}-Brennern in kohlenbefeuerten Kesseln in den Niederlanden

    Energy Technology Data Exchange (ETDEWEB)

    Kluyver, J.P. de [N.V. Elektriciteits-Produktiemaatschappij Zuid-Nederland (EPZ), Limburg (Netherlands); Gast, C.H. [N.V. KEMA, Arnheim (Netherlands)

    1995-07-01

    In June 1990, a plan was agreed between operators and the government to reduce NO{sub x} emissions from power stations in the Netherlands from 74 million kilograms in the year 1989 to 55 million kilograms in the year 1994 and 35 million kilograms in the year 2000. For coal-fired power stations, this meant: conversion of burners to low-NO{sub x} burners, improvements in existing pulverized coal mills, application of secondary measures in some coal-fired power stations, use of the latest low-NO{sub x} technology in the design of new plant. The results so far obtained are compared with the targets set and further developments are described. (orig.) [Deutsch] Im Juni 1990 wurde zwischen Betreibern und Regierung ein Plan vereinbart, die NO{sub x}-Emissionen aus niederlaendischen Kraftwerken von 74 Mill. kg im Jahre 1989 auf 55 Mill. kg im Jahre 1994 und 35 Mill. kg im Jahre 2000 zu senken. Fuer die Kohlekraftwerke hiess das: Umbau der Brenner zu Low-NO{sub x}-Brennern, Verbesserungen der vorhandenen Kohlenstaubmuehlen. Anwendung sekundaerer Massnahmen in einigen kohlebefeuerten Kraftwerken. Einsatz der neuesten Low-NO{sub x}-Techniken beim Bau neuer Anlagen. Die bis jetzt erreichten Ergebnisse werden mit den Zielsetzungen verglichen und die weiteren Entwicklungen beschrieben. (orig.)

  9. Etap Hotel Augsburg City with green technology. VRV heat recovery technology in low-budget hotels: 2-conductor and 3-conductor systems; Etap Hotel Augsburg City mit gruenen Extras. VRV-Technologie in Low-Budgets-Hotels in 2- und 3-Leiter Ausfuehrung

    Energy Technology Data Exchange (ETDEWEB)

    Graupensberger, Thomas; Huhn, Ole [Daikin Airconditioning Germany GmbH, Muenchen (Germany)

    2011-11-15

    Etap Hotel, the low-budget hotels of the Accor Group and the European leader in this segment, opened a new hotel in Augsburg city on 1 March 2010. the building was constructed according to ecological criteria and boasts state-of-the-art technology. The contribution presents details.

  10. First field experiences with OBD II; Erste Felderfahrungen mit OBD II

    Energy Technology Data Exchange (ETDEWEB)

    Zander, W. [AUDI AG, Ingolstadt (Germany)

    1994-12-31

    A report is given on first field experiences of the diagnosis technology (OBD II) with the help of examples. Since the vehicles which were sold to customers have not done enough miles yet the experience report mainly refers to AUDI`s own vehicles. The results are positive. Hence the company AUDI AG can claim that a sensitive, reliable system for assessing important engine components is available due to this new technology. (orig.) [Deutsch] Es wird anhand von Beispielen aus der Diagnosetechnik (OBD II) ueber erste Felderfahrungen berichtet. Da ausgelieferte Fahrzeuge beim Kunden noch zu geringe Laufstrecken hinter sich haben, beziehen sich die Erfahrungen in erster Linie auf eigene Dauerlaeufer. Die Ergebnisse sind positiv, so dass wir behaupten koennen, mit dieser Technik ein sensibles, zuverlaessiges System zur Beurteilung wesentlicher Motorkomponenten zur Verfuegung zu haben. (orig.)

  11. Carbon dioxide sequestration by mineral carbonation. Feasibility of enhanced natural weathering as a CO2 emission reduction technology

    Energy Technology Data Exchange (ETDEWEB)

    Huijgen, W.J.J. [ECN Biomass, Coal and Environmental Research, Petten (Netherlands)

    2007-07-01

    A possible technology that can contribute to the reduction of carbon dioxide emissions is CO2 sequestration by mineral carbonation. The basic concept behind mineral CO2 sequestration is the mimicking of natural weathering processes in which calcium or magnesium containing minerals react with gaseous CO2 and form solid calcium or magnesium carbonates. Potential advantages of mineral CO2 sequestration compared to, e.g., geological CO2 storage include (1) the permanent and inherently safe sequestration of CO2, due to the thermodynamic stability of the carbonate product formed and (2) the vast potential sequestration capacity, because of the widespread and abundant occurrence of suitable feedstock. In addition, carbonation is an exothermic process, which potentially limits the overall energy consumption and costs of CO2 emission reduction. However, weathering processes are slow, with timescales at natural conditions of thousands to millions of years. For industrial implementation, a reduction of the reaction time to the order of minutes has to be achieved by developing alternative process routes. The aim of this thesis is an investigation of the technical, energetic, and economic feasibility of CO2 sequestration by mineral carbonation. In Chapter 1 the literature published on CO2 sequestration by mineral carbonation is reviewed. Among the potentially suitable mineral feedstock for mineral CO2 sequestration, Ca-silicates, more particularly wollastonite (CaSiO3), a mineral ore, and steel slag, an industrial alkaline solid residue, are selected for further research. Alkaline Ca-rich residues seem particularly promising, since these materials are inexpensive and available near large industrial point sources of CO2. In addition, residues tend to react relatively rapidly with CO2 due to their (geo)chemical instability. Various process routes have been proposed for mineral carbonation, which often include a pre-treatment of the solid feedstock (e.g., size reduction and

  12. Erdmessung mit Quanten und Relativit\\"at

    CERN Document Server

    Müller, Jürgen

    2016-01-01

    Recent developments in fundamental physics (in theory as well as in technology) provide novel capabilities for geodetic applications such as refined observations of the Earth`s gravity field. We will focus on two new concepts: one applies atomic interferometry for (satellite) gravimetry, the other uses clock measurements for observing potential values. In the first case, gravity anomalies are determined by observing free-falling atoms (quantum gravimetry), such technique can also be applied for future gradiometric measurements in space. In the second case according to Einstein`s theory of general relativity, frequency comparisons of highly precise optical clocks give access to differences of the gravity potential, even over long distances (relativistic geodesy). Also laser interferometry between test masses in space with nanometer accuracy belongs to these novel concepts. For the latter, technology developed for gravitational wave detection and successfully tested in the LISA/pathfinder mission is being prepa...

  13. MIT Lincoln Laboratory Annual Report 2011

    Science.gov (United States)

    2011-01-01

    Multiple Sclerosis Bike & Hike the Berkshires The 15-member team of the Greater New England Chapter of the National Multiple Sclerosis Society raised...items collected for the Hannah’s Socks drive 9,031 dollars raised to help strike out multiple sclerosis 17,000+ dollars raised to fund research...technology development in support of national security. To ensure that this proud heritage continues, the Laboratory is also looking toward the future

  14. SPECT Imaging of patients with parkinsonian syndromes; SPECT-Untersuchungen bei Patienten mit Parkinson-Syndromen

    Energy Technology Data Exchange (ETDEWEB)

    Tatsch, K. [Klinik und Poliklinik fuer Nuklearmedizin, Klinikum der Univ. Muenchen-Grosshardern (Germany)

    2002-09-01

    Stimulated by the commercial availability of specific radioligands in vivo characterization of the dopaminergic system with single-photon emission tomography (SPECT) has gained clinical importance in the diagnostic work-up of patiens with parkinsonism. Currently interest is focused on two aspects of the dopaminergic neurotransmission: Cocaine analogues bind to the presynaptically located striatal dopamine transporter and herewith allow to assess the structural integrity of the presynaptic terminals which are the striatal projections of neurons originating in the substantia nigra. For functional assessment of the postsynaptic aspect of the dopaminergic synapse binding of specific receptor antagonists to postsynaptically located D2 receptors is analyzed. Depending on the clinical question and the pathology expected both methods - either each one alone or a combination of both - provide valuable diagnostic information. Currently those SPECT methods are applied to confirm or exclude a Parkinsonian syndrome, in the early and differential diagnosis of Parkinsonian syndromes, to assess disease severity and measure disease progression, and to monitor the effects of therapy e.g. with potentially neuroprotective drugs. This paper offers a comprehensive summary of the SPECT results reported in the literature dealing with the mentioned clinical applications. (orig.) [German] Stimuliert durch die kommerzielle Verfuegbarkeit spezifischer Radioliganden gewinnt die In-vivo-Charakterisierung des dopaminergen Systems mit der single-photon-emissions-computertomographie (SPECT) bei der diagnostischen Abklaerung von Parkinson-Syndromen zunehmend an Bedeutung. Hierbei stehen zwei Aspekte der dopaminergen Neurotransmission im Blickpunkt des Interesses: Die Bindung von Kokainanaloga an den praesynaptischen Dopamintransporter laesst Rueckschluesse auf die Integritaet von Neuronen der Substantia nigra mit ihren zum Corpus striatum projizierenden Axonen (praesynaptische Nervenfasern) zu. Die

  15. Feasibility of Technologies to Produce Coal-Based Fuels with Equal or Lower Greenhouse Gas Emissions than Petroleum Fuels

    Science.gov (United States)

    2014-12-22

    Estimated carbon dioxide (CO2) emissions over the life cycle of alternative fuels, from the mining and harvesting of resources to the conversion process...utilization, and storage CO2 Carbon dioxide CO2eq CO2 equivalent (metric measure used to compare the emissions from various greenhouse gases based upon their...been reported for oil palm biofuels), the GHG emissions factor for biomass feedstocks may even exceed that of petroleum. Additionally, incorporating

  16. Time value of emission and technology discounting rate for off-grid electricity generation in India using intermediate pyrolysis

    Energy Technology Data Exchange (ETDEWEB)

    Patel, Amit, E-mail: amitrp@iitrpr.ac.in [Indian Institute of Technology Ropar, Nangal Road, Rupnagar 140001, Punjab (India); Faculty of Technology and Engineering, The Maharaja Sayajirao University of Baroda, Vadodara 390001, Gujarat (India); Sarkar, Prabir; Tyagi, Himanshu; Singh, Harpreet [Indian Institute of Technology Ropar, Nangal Road, Rupnagar 140001, Punjab (India)

    2016-07-15

    The environmental impact assessment of a process over its entire operational lifespan is an important issue. Estimation of life cycle emission helps in predicting the contribution of a given process to abate (or to pollute) the environmental emission scenario. Considering diminishing and time-dependent effect of emission, assessment of the overall effect of emissions is very complex. The paper presents a generalized methodology for arriving at a single emission discounting number for a process option, using the concept of time value of carbon emission flow. This number incorporates the effect of the emission resulting from the process over the entire operational lifespan. The advantage of this method is its quantitative aspect as well as its flexible nature. It can be applied to any process. The method is demonstrated with the help of an Intermediate Pyrolysis process when used to generate off-grid electricity and opting biochar route for disposing straw residue. The scenarios of very high net emission to very high net carbon sequestration is generated using process by careful selection of process parameters for different scenarios. For these different scenarios, the process discounting rate was determined and its outcome is discussed. The paper also proposes a process specific eco-label that mentions the discounting rates. - Highlight: • Methodology to obtain emission discounting rate for a process is proposed. • The method includes all components of life cycle emission converts into a time dependent discounting number. • A case study of Intermediate Pyrolysis is used to obtain such number for a range of processes. • The method is useful to determine if the effect from the operation of a process will lead to a net absorption of emission or net accumulation of emission in the environment.

  17. How Much Have They Retained? Making Unseen Concepts Seen in a Freshman Electromagnetism Course at MIT

    Science.gov (United States)

    Dori, Yehudit Judy; Hult, Erin; Breslow, Lori; Belcher, John W.

    2007-08-01

    The introductory freshmen electromagnetism course at MIT has been taught since 2000 using a studio physics format entitled TEAL—Technology Enabled Active Learning. TEAL has created a collaborative, hands-on environment where students carry out desktop experiments, submit web-based assignments, and have access to a host of visualizations and simulations. These learning tools help them visualize unseen electromagnetic concepts and develop stronger intuition about related phenomena. A previous study has shown that students who took the course in the TEAL format (the experimental group) gained significantly better conceptual understanding than those who took it in the traditional lecture-recitation format (the control group). The present longitudinal study focuses on the extent to which these two research groups (experimental and control) retain conceptual understanding about a year to 18 months after finishing the course. It also examines students attitudes about whether the teaching format (TEAL or traditional) contributes to their learning in advanced courses. Our research has indicated that the long-term effect of the TEAL course on students' retention of concepts was significantly stronger than that of the traditional course. This research is significant because it documents the long-term cognitive and affective impact of the TEAL studio physics format on learning outcomes of MIT students.

  18. 化肥生产节能减排新技术%New Technology Energy Conservation and Emission Reduction in Fertilizer Production

    Institute of Scientific and Technical Information of China (English)

    汪家铭

    2012-01-01

    To introduce several advanced, applicable, mature, energy conservation and emission reduction technology in the chemical fertilizer production in recent years. These technologies will promote the development of the chemical fertilizer industry in terms of technical progress, energy-saving and emission reduction, recycling economy and low-carbon economy.%介绍了化肥生产近年来开发并取得成功应用的几项先进、适用、成熟的节能减排新技术,这些技术作为行业振兴支撑技术将对促进化肥行业的技术进步、节能减排、发展循环经济和低碳经济起到重要的作用。

  19. Carbon Dioxide Emission Reduction Technologies for Coal-fired Power Plants%燃煤电厂烟气中二氧化碳的减排技术

    Institute of Scientific and Technical Information of China (English)

    彭卫华

    2012-01-01

    Due to the growth emissions of CO2 and other greenhouse gases from fossil fuel combustion,greenhouse effect has brought significant influences on the world environment and social economic development.Then,the mitigation of CO2 emissions has drawn more attention all over the world.The paper had reviewed four main CO2 emission reduction technologies and various typical separation techniques for a major CO2 emission source,coal-fired power plants.In the end,CO2 capture technologies have been prospected.%由于CO2等温室气体引发的温室效应对全球生态环境和社会经济发展造成了显著影响,使得CO2减排受到了国际社会的密切关注。文章针对CO2的集中排放源,介绍燃煤电厂烟气中CO2减排技术路线和目前国际上常用的CO2捕集分离技术,最后分析和展望CO2捕集分离技术的发展前景。

  20. Zero emission city. Preliminary study; Null-Emissions-Stadt. Sondierungsstudie

    Energy Technology Data Exchange (ETDEWEB)

    Diefenbach, N.; Enseling, A.; Werner, P.; Flade, A.; Greiff, R.; Hennings, D.; Muehlich, E.; Wullkopf, U.; Sturm, P.; Kieslich, W.; Born, R.; Grossklos, M.; Hatteh, R.; Mueller, K.; Ratschow, A.; Valouch-Fornoff, C.

    2002-10-01

    The idea of a 'zero emission city' is investigated by the Institut Wohnen und Umwelt on behalf of the Federal Minister of Education and Research. After describing the current situation and defining the key parameters of a 'zero emission city', settlement structures, power supply, production processes and transportation are analyzed and linked with the communal action level to obtain a framework for research, activities and actions. The study ends with recommendations for a research programme 'zero emission city'. (orig.) [German] Die von den Staedten der Industrielaender ausgehenden Emissionen stellen im Hinblick auf die globalen Belastungen wie z.B. Treibhauseffekt, Ozonabbau und Versauerung das Hauptproblem dar. Aus diesem Grunde bietet es sich an, den Gedanken der 'Null-Emissions-Stadt', der Vision einer moeglichst emissionsfreien Stadt, aufzugreifen und auf seine Tragfaehigkeit fuer innovative Handlungsmodelle forschungsstrategisch zu ueberpruefen. Das Bundesministerium fuer Bildung und Forschung hat das Institut Wohnen und Umwelt beauftragt, in einer Sondierungsstudie dieser Fragestellung nachzugehen. Nach der Festlegung der Ausgangsbedingungen und Eckpunkte der Vision 'Null-Emissions-Stadt' und der Analyse der vier Handlungsfelder Siedlungsstrukturen, Energieversorgung, Produktionsprozesse (Kreislaufwirtschaft) und Verkehr werden diese aufgegriffen und mit der kommunalen Handlungsebene verknuepft und zu einem Forschungs-, Handlungs- und moeglichen Aktionsrahmen zusammengefuegt. Die Studie schliesst mit Hinweisen fuer die Gestaltung eines Forschungsprogramms 'Null-Emissions-Stadt'. (orig.)

  1. Impacts of pre-treatment technologies and co-products on greenhouse gas emissions and energy use of lignocellulosic ethanol production

    OpenAIRE

    Pourbafrani, Mohammad; McKechnie, Jon; Shen, Timothy; Saville, Bradley A.; MacLean, Heather L.

    2014-01-01

    Life cycle environmental performance of lignocellulosic ethanol produced through different production pathways and having different co-products has rarely been reported in the literature, with most studies focusing on a single pre-treatment and single co-product (electricity). The aim of this paper is to understand the life cycle energy use and greenhouse gas (GHG) emissions implications of alternative pre-treatment technologies (dilute acid hydrolysis, ammonia fiber expansion and autohydroly...

  2. Impacts of pre-treatment technologies and co-products on greenhouse gas emissions and energy use of lignocellulosic ethanol production

    OpenAIRE

    Pourbafrani, Mohammad; McKechnie, Jon; Shen, Timothy; Saville, Bradley A.; MacLean, Heather L.

    2014-01-01

    Life cycle environmental performance of lignocellulosic ethanol produced through different production pathways and having different co-products has rarely been reported in the literature, with most studies focusing on a single pre-treatment and single co-product (electricity). The aim of this paper is to understand the life cycle energy use and greenhouse gas (GHG) emissions implications of alternative pre-treatment technologies (dilute acid hydrolysis, ammonia fiber expansion and autohydrol...

  3. Climate technology strategies. Vol. 2. The macro-economic cost and benefit or reducing greenhouse gas emissions in the European Union

    Energy Technology Data Exchange (ETDEWEB)

    Capros, P.; Georgakopoulos, P. [National Technical Univ., Athens (Greece). Dept. of Electrical and Computer Engineering; Regemorter, D. van; Proost, S. [Catholic Univ., Leuven (Belgium). Center for Economic Studies; Schmidt, T.F.N.; Koschel, H. [Zentrum fuer Europaeische Wirtschaftsforschung GmbH (ZEW), Mannheim (Germany); Conrad, K. [Mannheim Univ. (Germany). Fakultaet fuer Volkswirtschaftslehre und Statistik; Vouyoukas, E.L.

    1999-07-01

    Climate technology becomes more and more relevant in international environmental policy negotiations. At the Kyoto conference binding emission reduction targets have been established for several regions of the world. The major challenge is how to realize these reduction goals with minimum costs without generating new distributional and social difficulties. The book analyses the macroeconomic structural and distributional impacts of greenhouse gas mitigation strategies for the EU and the member states. (orig.)

  4. Real-world energy use and emission rates for idling long-haul trucks and selected idle reduction technologies.

    Science.gov (United States)

    Frey, H Christopher; Kuo, Po-Yao

    2009-07-01

    Long-haul freight trucks typically idle for 2000 or more hours per year, motivating interest in reducing idle fuel use and emissions using auxiliary power units (APUs) and shore-power (SP). Fuel-use rates are estimated based on electronic control unit (ECU) data for truck engines and measurements for APU engines. Engine emission factors were measured using a portable emission measurement system. Indirect emissions from SP were based on average utility grid emission factors. Base engine fuel use and APU and SP electrical load were analyzed for 20 trucks monitored for more than 1 yr during 2.76 million mi of activity within 42 U.S. states. The average base engine fuel use varied from 0.46 to 0.65 gal/hr. The average APU fuel use varied from 0.24 to 0.41 gal/hr. Fuel-use rates are typically lowest in mild weather, highest in hot or cold weather, and depend on engine speed (revolutions per minute [RPM]). Compared with the base engine, APU fuel use and emissions of carbon dioxide (CO2) and sulfur dioxide (SO2) are lower by 36-47%. Oxides of nitrogen (NO(x)) emissions are lower by 80-90%. Reductions in particulate matter (PM), carbon monoxide (CO), and hydrocarbon emissions vary from approximately 10 to over 50%. SP leads to more substantial reductions, except for SO2. The actual achievable reductions will be lower because only a fraction of base engine usage will be replaced by APUs, SP, or both. Recommendations are made for reducing base engine fuel use and emissions, accounting for variability in fuel use and emissions reductions, and further work to quantify real-world avoided fuel use and emissions.

  5. Effect of CO{sub 2} and emissions-trading on the Swiss national economy - Analysis using a multi-country equilibrium model; Volkswirtschaftliche Auswirkungen von CO{sub 2}-Abgaben und Emissionshandel fuer das Jahr 2020 - Analyse der volkswirtschaftlichen Auswirkungen mit Hilfe eines allgemeinen Mehrlaender-Gleichgewichtsmodell

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2008-09-15

    This report elaborated for the Swiss Federal Office for the Environment (FOEN) deals with questions concerning Swiss climate policy after 2012. In 2012, existing climate legislation as defined in CO{sub 2} emissions legislation is to be revised and brought in line with European legislation on greenhouse gases. The report presents and discusses the proposals of the Swiss government that are to make Switzerland climate-neutral. These questions include how high a steering-tax must be in order to provide a 20% reduction in CO{sub 2} emissions, the amount of finance needed to do this, which effects on the economy in general (GDP) and on particular sectors are to be expected, how households will be affected and how large the positive secondary side-effects of an active climate policy are. The methods used in the study and their limitations are examined. A multi-country equilibrium model is introduced and various scenarios are discussed

  6. Endokrinologische Behandlung der Geschlechtsdysphorie bei Menschen mit Geschlechtsinkongruenz

    Directory of Open Access Journals (Sweden)

    Flütsch N

    2015-01-01

    Full Text Available Es gibt Menschen, die die innere Gewissheit besitzen, dass ihre Geschlechtsidentität nicht zu ihrem biologischen Ursprungsgeschlecht passt. Durch die Entwicklungen in der Medizin in den letzten hundert Jahren ist es möglich geworden, die körperlichen Geschlechtsmerkmale an das innerlich erlebte Geschlecht anzupassen. Die Zahl der Hilfesuchenden in den ärztlichen Ambulanzen und Privatpraxen hat in den vergangenen Jahren deutlich zugenommen. Das Vorgehen bei der Diagnostik und Therapieeinleitung erlebt zurzeit eine deutliche Veränderung hin zu mehr Patientenzentriertheit und Individualisierung des Transitionsprozesses. Dabei bildet die geschlechtsangleichende Hormontherapie ein wesentliches Standbein in der körperlichen Angleichung an das Gegengeschlecht. Unter Beachtung von bestimmten Sicherheitsaspekten ist eine Hormontherapie mit Sexualhormonen sicher und einfach durchzuführen. Regelmäßige Verlaufskontrollen sowie der offene und affirmative Umgang mit den Betroffenen tragen zudem wesentlich zur Sicherheit in der Behandlung bei.

  7. Supermarket refrigerators with natural refrigerants; Supermarktkaelteanlagen mit natuerlichen Kaeltemitteln. Erfahrungsbericht

    Energy Technology Data Exchange (ETDEWEB)

    Haaf, S.; Heinbokel, B. [Linde AG, Koeln (Germany). Gechaeftsbereich Linde Kaeltetechnik

    2002-09-01

    In view of the high contribution to global warming of H-CFC refrigerants, substitution has been a key concern for several years now. Leakage protection measures were enhanced, and Linde also installed many supermarket refrigerators with natural refrigerants, i.e. ammonia, propene and carbon dioxide. The environmental and economic aspects are assessed on the basis of the experience gained, and the systems are compared with H-CFC refrigeration systems. [German] Wegen des betraechtlichen Treibhauspotentials von HFKW-Kaeltemitteln werden seit Jahren Anstrengungen unternommen, um den von diesen Stoffen ausgehenden Treibhauseffekt zu reduzieren. Neben Massnahmen zur Verminderung von Leckagen sowie zur Verringerung von Kaeltemittel-Fuellmengen wurden im Laufe der letzten 10 Jahre von Linde auch zahlreiche Kaelteanlagen mit den natuerlichen Kaeltemitteln Ammoniak, Propen und Kohlendioxid in Supermaerkten installiert. Auf Basis der gesammelten Erfahrungen wird eine Einschaetzung der umweltspezifischen und wirtschaftlichen Aspekte im Vergleich zu Anlagen mit HFKW-Kaeltemitteln vorgenommen. (orig.)

  8. Therapiemonitoring mit bildgebenden Verfahren im modernen Management von Hirntumoren

    Directory of Open Access Journals (Sweden)

    Gerigk L

    2010-01-01

    Full Text Available Bildgebende Verfahren sind eine wichtige Grundlage der Therapieplanung und -kontrolle bei Hirntumoren. Bislang diente hierzu in erster Linie die Größenbeurteilung auf herkömmlichen morphologischen MRT-Aufnahmen. Sowohl zur besseren Therapieplanung und -kontrolle im Rahmen etablierter Therapieschemata als auch zur Evaluation neuer Therapieverfahren ist die Erfassung physiologischer Parameter wie der Perfusion, Diffusion oder Permeabilität mithilfe von MRT und PET eine vielversprechende Entwicklung. Mit der PET und entsprechenden Tracern können zusätzlich auch Targets zur Tumorklassifikation oder gezielten Therapie nachgewiesen werden. Mit der Spektroskopie können für Tumorgewebe typische Metabolite nachgewiesen werden. Bei einigen Tumorentitäten wie den niedergradigen Gliomen zeigten Studien, dass die Perfusionsbildgebung hilfreich zur Planung des weiteren therapeutischen Vorgehens sein kann. Ziel ist, durch eine Kombination geeigneter Verfahren zu einer frühen und treffsicheren Diagnostik beizutragen.

  9. MIT-Skywalker: Evaluating comfort of bicycle/saddle seat.

    Science.gov (United States)

    Goncalves, Rogerio S; Hamilton, Taya; Daher, Ali R; Hirai, Hiroaki; Krebs, Hermano I

    2017-07-01

    The MIT-Skywalker is a robotic device developed for the rehabilitation of gait and balance after a neurological injury. This device has been designed based on the concept of a passive walker and provides three distinct training modes: discrete movement, rhythmic movement, and balance training. In this paper, we present our efforts to evaluate the comfort of a bicycle/saddle seat design for the system's novel actuated body weight support device. We employed different bicycle and saddle seats and evaluated comfort using objective and subjective measures. Here we will summarize the results obtained from a study of fifteen healthy subjects and one stroke patient that led to the selection of a saddle seat design for the MIT-Skywalker.

  10. Summary of performance data for technologies to control gaseous, odor, and particulate emissions from livestock operations: Air management practices assessment tool (AMPAT

    Directory of Open Access Journals (Sweden)

    Devin L. Maurer

    2016-06-01

    Full Text Available The livestock and poultry production industry, regulatory agencies, and researchers lack a current, science-based guide and data base for evaluation of air quality mitigation technologies. Data collected from science-based review of mitigation technologies using practical, stakeholders-oriented evaluation criteria to identify knowledge gaps/needs and focuses for future research efforts on technologies and areas with the greatest impact potential is presented in the Literature Database tab on the air management practices tool (AMPAT. The AMPAT is web-based (available at www.agronext.iastate.edu/ampat and provides an objective overview of mitigation practices best suited to address odor, gaseous, and particulate matter (PM emissions at livestock operations. The data was compiled into Excel spreadsheets from a literature review of 265 papers was performed to (1 evaluate mitigation technologies performance for emissions of odor, volatile organic compounds (VOCs, ammonia (NH3, hydrogen sulfide (H2S, particulate matter (PM, and greenhouse gases (GHGs and to (2 inform future research needs.

  11. Hochauflösende Verarbeitung von Radardaten mit synthetischer Apertur

    OpenAIRE

    Mittermayer, Josef

    2006-01-01

    Diese Arbeit stellt das neuartige Frequenz-Skalierungs-Verfahren zur effizienten und genauen Verarbeitung von Spotlight-SAR-Daten ohne Interpolation vor. Es wird eine genaue Modellierung der Spotlight-Abbildungsgeometrie eingeführt. Eine neue analytische Formulierung für SAR-Rohdaten mit Dechirp on Receive-Operation wird abgeleitet. Aufbauend auf dieser Formulierung erfolgt die Entwicklung einer interpolationsfreien Korrektur der Zielentfernungsänderung, der sogenannten Frequenz-Skalierung. ...

  12. Unverarbeitete Trauer in Familien mit einem psychosomatisch kranken Kind

    OpenAIRE

    Perinelli, Karin; Günther, Charlotte

    1983-01-01

    In einer Untersuchungsstudie über die psychosoziale Abwehr in psychosomatischen Familien interessierte der Befund, daß Eltern von Kindern, die psychosomatisch erkrankt sind, weitaus häufiger als Eltern in einer Vergleichsgruppe frühe Personenverluste zu verkraften hatten, die sie heute empfindlich gegen Trennung machen. Es wird gezeigt, wie das Auftreten eines psychosomatischen Symptoms beim Kind mit unverarbeiteter Trauer in seiner Familie in Zusammenhang stehen konnte. Der von Minuchin für ...

  13. Phytoremediation organischer Schadstoffe mit Hilfe von Phragmites australis

    OpenAIRE

    Neustifter, Juliane Erika

    2007-01-01

    Praxisorientierte Projekte an einer Kläranlage lieferten umfassende Einblicke in einen mit Phragmites australis, dem Schilfrohr, bepflanzten Bodenfilter und seine jahreszeitlichen Rhythmen. Es wurde festgestellt, dass der Filter eine ausgezeichnete Restreinigung und Pufferwirkung hat und sogar verschiedene endokrin wirksame Substanzen zurückhält. Es konnte gezeigt werden, dass Phragmites australis organische Schadstoffe aufnehmen kann und wichtige Entgiftungsenzyme für den Abbau dieser Xenobi...

  14. Third Culture Kids? Auslandsentsendung mit Kindern und Jugendlichen

    OpenAIRE

    2006-01-01

    Die Arbeit untersucht die langfristigen Auswirkungen von Auslandsaufenthalten im Kindesalter. Das Interesse richtet sich auf die Frage, welche Rolle der Auslandsaufenthalt für die Identität im Erwachsenenalter spielt. Zu diesem Zweck wurden qualitative Interviews mit Erwachsenen geführt, die in ihren Entwicklungsjahren durch den Umzug von ihrem Ursprungsland in ein fremdes Land – und wieder zurück – Transitionserfahrungen gemacht haben.

  15. Topologie und Dynamische Netzwerke: Anwendungen Der Optimierung MIT Zukunft

    Science.gov (United States)

    Leugering, Günter; Martin, Alexander; Stingl, Michael

    Die optimale Auslegung von Infrastrukturen z. B. bei der Verkehrsplanung und bei der Planung von Versorgungssystemen, die optimale Strukturierung bzw. Formgebung von Materialien und Werkstücken z. B. im Leichtbau sind aktuelle Themen angewandter Forschung. In beiden Bereichen wurde bis in die jüngste Zeit vornehmlich eine simulationsbasierte Optimierung auf der Grundlage einer Parameterjustierung vorgenommen, die oft wenig systematisch und zeit- und kostenintensiv ist. Stattdessen erweisen sich modellbasierte mathematische Optimierungsalgorithmen zusammen mit moderner numerischer Simulations-und Visualisierungstechnologie zunehmend als Katalysator neuer Technologien. Eine so verstandene Mathematische Optimierung kann bereits auf beeindruckende Erfolgsgeschichten verweisen und so den Anspruch als eine Zukunftsdisziplin behaupten. Diesem Anspruch trägt die Einrichtung des DFG-Schwerpunktprogramms 1253, Optimierung mit partiellen Differentialgleichungen’ im Jahre 2006 Rechnung, in dem über 25 Projekte im Bundesgebiet sowohl auf die theoretische Fundierung, als auch und insbesondere auf die Verzahnung zwischen Methodenentwicklung und numerischer Realisierung fokussieren. Forschung im Bereich der mathematischen Optimierung und Steuerung von Prozessen bzw. Eigenschaften, die mit Hilfe partieller Differentialgleichungen, so genannten, verteilten Systemen’, beschrieben werden, erfolgt im Kontext konkreter und exemplarischer Anwendungssituationen, die neue mathematische Herausforderungen markieren: Sicherheitsvorgaben etwa bei der Belastung von Gas- und Frischwasserleitungen oder solche für die Belastbarkeit von Verkehrsflugzeugen führen auf Druckbeschränkungen bzw.

  16. Nagelbefall kann bei Patienten mit Psoriasis auf eine Enthesiopathie hinweisen.

    Science.gov (United States)

    Castellanos-González, Maria; Joven, Beatriz Esther; Sánchez, Julio; Andrés-Esteban, Eva María; Vanaclocha-Sebastián, Francisco; Romero, Pablo Ortiz; Díaz, Raquel Rivera

    2016-11-01

    Obwohl subklinische Enthesiopathie ein gut etabliertes diagnostisches Merkmal der Psoriasisarthritis (PsA) ist, wird sie häufig übersehen, da viele Patienten asymptomatisch sind. Gäbe es klinische Hinweise auf das Vorliegen einer Enthesiopathie, würde dies den Klinikern die Möglichkeit eröffnen, eine PsA frühzeitig zu diagnostizieren. Es wurde eine monozentrische prospektive Studie mit insgesamt 90 Psoriasis-Patienten durchgeführt, um mittels Ultraschall das Vorliegen von Enthesenanomalien zu untersuchen und eine Korrelation mit dem Befall der Nägel festzustellen. Enthesenanomalien wurden bei 23 Patienten (25,5 %) gefunden, von denen 19 (82,6 %) Nagelbefall aufwiesen. Bei 4 Patienten waren die Nägel nicht betroffen. Enthesiopathie lag bei 31,1 % (19/61) der Patienten mit Onychopathie vor, von den Patienten ohne Nagelbefall litten nur 13,8 % (4/29) an Enthesiopathie (p = 0,07). Zwischen dem Target-NAPSI-Score und dem Vorliegen einer Enthesiopathie bestand eine signifikante Korrelation. Eine signifikante Korrelation bestand darüber hinaus auch zwischen dem Vorliegen einer Enthesiopathie und der Anzahl der betroffenen Nägel (p = 0,035). Klinische Belege für eine Onychopathie können der Schlüssel für die frühe Diagnose einer Enthesiopathie bei Psoriasis-Patienten sein. © 2016 Deutsche Dermatologische Gesellschaft (DDG). Published by John Wiley & Sons Ltd.

  17. Phylogenetic relationships of the Gomphales based on nuc-25S-rDNA, mit-12S-rDNA, and mit-atp6-DNA combined sequences

    Science.gov (United States)

    Admir J. Giachini; Kentaro Hosaka; Eduardo Nouhra; Joseph Spatafora; James M. Trappe

    2010-01-01

    Phylogenetic relationships among Geastrales, Gomphales, Hysterangiales, and Phallales were estimated via combined sequences: nuclear large subunit ribosomal DNA (nuc-25S-rDNA), mitochondrial small subunit ribosomal DNA (mit-12S-rDNA), and mitochondrial atp6 DNA (mit-atp6-DNA). Eighty-one taxa comprising 19 genera and 58 species...

  18. Science and History Banham versus Rowe [Saarinen on the MIT Campus

    Directory of Open Access Journals (Sweden)

    Luis Rojo de Castro

    2016-05-01

    However, what neither Saarinen nor MIT did foresee was the difficulty for the integration of humanism and science in a coherent and stable architectural image, precisely in the 1950’s. The integration of such confronted paradigms, characterized within architecture discipline as the opposition between the operational lore and technological advances led to a long and thorough debate only to be somehow concluded by 1975 with the ephemeral and temporary victory of the arguments of tradition. A controversy between two diverse however distinctive architectural components, confronted by Modernism in a skewed debate from both sides and, by 1950, made explicit in the differences between Reyner Banham’s and Colin Rowe’s writings. Their conflicting arguments, contemporary to the Chapel and Kresge Auditorium, provide the critical context in which to inscribe Saarinen’s buildings and the wide international controversy they triggered.

  19. Rapid Speech Transmission Index predictions and auralizations of unusual instructional spaces at MIT's new Stata Center

    Science.gov (United States)

    Conant, David A.

    2005-04-01

    The Stata Center for Computer, Information and Intelligence Sciences, recently opened at the Massachusetts Institute of Technology, includes a variety of oddly-shaped seminar rooms in addition to lecture spaces of somewhat more conventional form. The architects design approach prohibited following conventional, well understood room-acoustical behavior yet MIT and the design team were keenly interested in ensuring that these spaces functioned exceptionally well, acoustically. CATT-Acoustic room modeling was employed to assess RASTI through multiple design iterations for all these spaces. Presented here are computational and descriptive results achieved for these rooms which are highly-regarded by faculty. They all sound peculiarly good, given their unusual form. In addition, binaural auralizations for selected spaces are provided.

  20. Kasuistik 1: 62-jähriger Rentner mit Altershypogonadismus therapiert mit Pflaster und Gel im Vergleich

    Directory of Open Access Journals (Sweden)

    Behre HM

    2003-01-01

    Full Text Available 62-jähriger Rentner mit normogonadotropem Altershypogonadismus. Der Patient leidet seit 2 Jahren vermehrt unter Schweißausbrüchen und Hitzewallungen, Schlafstörungen, einer zunehmenden Leistungsminderung und einer Erektionsschwäche. Aufgrund des Altershypogonadismus wurde vor der Vorstellung in der andrologischen Sprechstunde vom Hausarzt eine Substitutionstherapie mit Androderm® 2 x 2,5 mg/d begonnen. Unter dieser Therapie wurden keine normwertigen Testosteron-Serumspiegel erreicht, da die Testosteronpflaster aufgrund vermehrten Schwitzens des Patienten nicht an der Haut haften. Bei den Kontrolluntersuchungen unter Androderm-Medikation sind die Testosteronwerte kontinuierlich im hypogonadalen Bereich (Ausgangswert: 3,7 nmol/l [Normbereich 12-35 nmol/l, Blutabnahmen jeweils am Morgen]; Kontrolluntersuchungen unter Androdermtherapie (ca. 12 Stunden nach Applikation: 4,9 nmol/l, 5,1 nmol/l. Unter der Androderm-Medikation besserten sich die oben beschriebenen Beschwerden nicht.

  1. Opportunities to integrate solar technologies into the Chilean lithium mining industry - reducing process related GHG emissions of a strategic storage resource

    Science.gov (United States)

    Telsnig, Thomas; Potz, Christian; Haas, Jannik; Eltrop, Ludger; Palma-Behnke, Rodrigo

    2017-06-01

    The arid northern regions of Chile are characterized by an intensive mineral mining industry and high solar irradiance levels. Besides Chile's main mining products, copper, molybdenum and iron, the production of lithium carbonate from lithium containing brines has become strategically important due to the rising demand for battery technologies worldwide. Its energy-intensive production may affect the ecological footprint of the product and the country's climate targets. Thus, the use of solar technologies for electricity and heat production might constitute an interesting option for CO2 mitigation. This study aims to quantify the impacts of the lithium carbonate production processes in Chile on climate change, and to identify site-specific integration options of solar energy technologies to reduce GHG life-cycle emissions. The considered solar integration options include a parabolic trough power plant with a molten salt storage, a solar tower power plant with molten salt receiver and molten salt storage, a one-axis tracking photovoltaic energy system for electricity, and two solar thermal power plants with Ruths storage (steam accumulator) for thermal heat production. CSP plants were identified as measures with the highest GHG mitigation potential reducing the CO2 emissions for the entire production chain and the lithium production between 16% and 33%. In a scenario that combines solar technologies for electricity and thermal energy generation, up to 59% of the CO2 emissions at the lithium production sites in Chile can be avoided. A comparison of the GHG abatement costs of the proposed solar integration options indicates that the photovoltaic system, the solar thermal plant with limited storage and the solar tower power plant are the most cost effective options.

  2. Effects of idle reduction technologies on real world fuel use and exhaust emissions of idling long-haul trucks.

    Science.gov (United States)

    Frey, H Christopher; Kuo, Po-Yao; Villa, Charles

    2009-09-01

    Idling long-haul freight tucks may consume nearly one billion gallons of diesel fuel per year in the U.S. There is a need for real-world data by which to quantify avoided fuel use and emissions attributable to idle reduction techniques of auxiliary power units (APUs) and shore-power (SP). Field data were obtained from 20 APU-equipped and SP-compatible trucks observed during 2.8 million miles of travel in 42 states. Base engine fuel use and emission rates varied depending on ambient temperature. APU and SP energy use and emission rates varied depending on electrical load. APUs reduced idling fuel use and CO2 emissions for single and team drivers by 22 and 5% annually, respectively. SP offers greater reductions in energy use of 48% for single drivers, as well as in emissions, except for SO2. APUs were cost-effective for single drivers with a large number of APU usage hours per year, but not for team drivers or for single drivers with low APU utilization rates. The findings support more accurate assessments of avoided fuel use and emissions, and recommendations to encourage greater APU utilization by single drivers and to further develop infrastructure for SP.

  3. Using learning curves on energy-efficient technologies to estimate future energy savings and emission reduction potentials in the U.S. iron and steel industry

    Energy Technology Data Exchange (ETDEWEB)

    Karali, Nihan [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Park, Won Young [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); McNeil, Michael A. [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

    2015-06-18

    Increasing concerns on non-sustainable energy use and climate change spur a growing research interest in energy efficiency potentials in various critical areas such as industrial production. This paper focuses on learning curve aspects of energy efficiency measures in the U.S iron and steel sector. A number of early-stage efficient technologies (i.e., emerging or demonstration technologies) are technically feasible and have the potential to make a significant contribution to energy saving and CO2 emissions reduction, but fall short economically to be included. However, they may also have the cost effective potential for significant cost reduction and/or performance improvement in the future under learning effects such as ‘learning-by-doing’. The investigation is carried out using ISEEM, a technology oriented, linear optimization model. We investigated how steel demand is balanced with/without the availability learning curve, compared to a Reference scenario. The retrofit (or investment in some cases) costs of energy efficient technologies decline in the scenario where learning curve is applied. The analysis also addresses market penetration of energy efficient technologies, energy saving, and CO2 emissions in the U.S. iron and steel sector with/without learning impact. Accordingly, the study helps those who use energy models better manage the price barriers preventing unrealistic diffusion of energy-efficiency technologies, better understand the market and learning system involved, predict future achievable learning rates more accurately, and project future savings via energy-efficiency technologies with presence of learning. We conclude from our analysis that, most of the existing energy efficiency technologies that are currently used in the U.S. iron and steel sector are cost effective. Penetration levels increases through the years, even though there is no price reduction. However, demonstration technologies are not economically

  4. Design instructions for condensers and recirculation coolers with axial blowers; Auslegungshinweis fuer Verfluessiger und Rueckkuehler mit Axialventilatoren

    Energy Technology Data Exchange (ETDEWEB)

    Handschuh, R. [Hans Guentner GmbH, Fuerstenfeldbruck (Germany)

    2003-07-01

    Apart from an explanation of the selectrion criteria for condensers and recirculation coolers with axial blowers for outside installation, information is presented on sound propagation. Selection according to the condensing capacity O{sub c}, the recooling rate Q{sub H} and the available floor space can be made with the aid of the Guentner Product Calculator GPC. Permissible noise emissions and adjacent installation of condensers and recoolers are gone into as well as noise propagation as a function of external noise, noise direction, noise reflection, the number of noise sources, the distance of the noise source from the emission point, and possible noise abatement factors are gone into as well. (orig.) [German] Neben der Erlaeuterung der Auswahlkriterien fuer Verfluessiger und Rueckkuehler mit Axialventilatoren zur Aufstellung im Freien werden Hinweise fuer die Schallausbreitung gegeben. Die Auswahl nach der Verfluessigungsleistung Q{sub c} bzw. der Rueckkuehlleistung Q{sub H} und der vorhandenen Aufstellflaeche kann mit dem Guentner Product Calculator GPC geschehen. Es wird auf die zulaessige Geraeuschimmission auf die Nachbarschaft von Verfluessigern und Rueckkuehlern eingegangen und deren Schallausbreitung in Abhaengigkeit von Fremdgeraeuscheinwirkungen, Schallrichtwirkung, der Schallreflexion, der Anzahl der Schallquellen, der Entfernung der Schallquelle zur Emissionsstelle und moegliche Daempfungen betrachtet. (orig.)

  5. Continuing educattion by means of the internet; Aus- und Weiterbildung mit dem Internet

    Energy Technology Data Exchange (ETDEWEB)

    Jurasszovich, H.; Lischka, M. [Wien Univ. (Austria). Inst. fuer Medizinische Aus- und Weiterbildung

    2000-04-01

    A world wide homogenous level of knowledge for all members of an expert community is the proposed aim of academic education. The potential of the World Wide Web (WWW) with respect to under- and postgraduate education maybe accomplished if its use will become a definite part of cultural skills. Additionally, the process of simple collection of information should be added by the process of gaining knowledge and experience. Adaptation to the target group and a high degree of interactivity are the two main characteristics of high-quality technology-based learning materials. Considering both most of the web-ressources show deficits. Instructional design as well as information technology have means to overcome these deficits. With respect to the didactic principles of materials for beginners and advanced students, the architecture of computerised learning programs plays a significant role. However, costs to develop high-level learning materials is extremely high. Therefore it is necessary, to use synergetic effects with other digitized clinical and scientific materials. (orig.) [German] Ein weltweit homogener Wissensstand fuer alle Mitglieder einer Expertengemeinschaft ist das anzustrebende Ziel der akademischen Aus- und Weiterbildung. Das Potential des Internets im Bildungsbereich kann dann einer Nutzung zugefuehrt werden, wenn seine Anwendung in das Spektrum der Kulturfertigkeiten aufgenommen wird und, zweitens, ueber das Sammeln von Informationen hinaus auch Wissen und Erfahrung erworben werden koennen. Zielgruppenorientierung und hohe Interaktivitaet sind die beiden zentralen Qualitaetsmerkmale technologiebasierter Materialien fuer den Wissenserwerb. Webbasierte Ressourcen erweisen sich jedoch gerade in dieser Hinsicht meist als defizitaer. Mit Mitteln des Instruktionsdesign und der Informationstechnologie koennen diese Defizite ueberwunden werden. Im Hinglick auf die Lernbeduerfnisse von Anfaengern und Fortgeschrittenen kommt der Architektur von Lernanwendungen hohe

  6. Chemical and toxicological properties of emissions from CNG transit buses equipped with three-way catalysts compared to lean-burn engines and oxidation catalyst technologies

    Science.gov (United States)

    Yoon, Seungju; Hu, Shaohua; Kado, Norman Y.; Thiruvengadam, Arvind; Collins, John F.; Gautam, Mridul; Herner, Jorn D.; Ayala, Alberto

    2014-02-01

    Chemical and toxicological properties of emissions from compressed natural gas (CNG) fueled transit buses with stoichiometric combustion engines and three-way catalyst (TWC) exhaust control systems were measured using a chassis dynamometer testing facility and compared to the data from earlier CNG engine and exhaust control technologies. Gaseous and particulate matter emissions from buses with stoichiometric engines and TWC were significantly lower than the emissions from buses with lean-burn engines. Carbonyls and volatile organic compounds (VOCs) from buses with stoichiometric engines and TWC were lower by more than 99% compared to buses with lean-burn engines. Elemental and organic carbons (EC and OC), polycyclic aromatic hydrocarbons (PAHs), and trace elements from buses with stoichiometric engines and TWC were effectively controlled and significantly lower than the emissions from buses with lean-burn engines. Potential mutagenicity measured using a microsuspension modification of the Salmonella/microsome assay was lower by more than 99% for buses with stoichiometric engines and TWC, compared to buses with lean-burn engines and OxC.

  7. DOE Project: Optimization of Advanced Diesel Engine Combustion Strategies "University Research in Advanced Combustion and Emissions Control" Office of FreedomCAR and Vehicle Technologies Program

    Energy Technology Data Exchange (ETDEWEB)

    Reitz, Rolf; Foster, D.; Ghandhi, J.; Rothamer, D.; Rutland, C.; Sanders, S.; Trujillo, M.

    2012-10-26

    The goal of the present technology development was to increase the efficiency of internal combustion engines while minimizing the energy penalty of meeting emissions regulations. This objective was achieved through experimentation and the development of advanced combustion regimes and emission control strategies, coupled with advanced petroleum and non-petroleum fuel formulations. To meet the goals of the project, it was necessary to improve the efficiency of expansion work extraction, and this required optimized combustion phasing and minimized in-cylinder heat transfer losses. To minimize fuel used for diesel particulate filter (DPF) regeneration, soot emissions were also minimized. Because of the complex nature of optimizing production engines for real-world variations in fuels, temperatures and pressures, the project applied high-fidelity computing and high-resolution engine experiments synergistically to create and apply advanced tools (i.e., fast, accurate predictive models) developed for low-emission, fuel-efficient engine designs. The companion experiments were conducted using representative single- and multi-cylinder automotive and truck diesel engines.

  8. ABS生产污水的减排及控制新技术%Emission reduction and new control technology of ABS production wastewater

    Institute of Scientific and Technical Information of China (English)

    左立娟

    2016-01-01

    This paper expounded the generation cause for wastewater in ABS resin production with emulsion method. By analyzing the wastewaters of different types and combining production process characteristics ,emission reduction and new control technology of ABS production wastewater was implemented,ideal emission reduction and control result was obtained.%阐述了乳液法生产ABS树脂过程中污水的产生原因,通过对不同类型污水进行分析,结合生产工艺特点,实施了ABS生产污水减排及控制新技术,收到了理想的减排控制效果。

  9. An assessment of electric vehicles: technology, infrastructure requirements, greenhouse-gas emissions, petroleum use, material use, lifetime cost, consumer acceptance and policy initiatives.

    Science.gov (United States)

    Delucchi, M A; Yang, C; Burke, A F; Ogden, J M; Kurani, K; Kessler, J; Sperling, D

    2014-01-13

    Concerns about climate change, urban air pollution and dependence on unstable and expensive supplies of foreign oil have led policy-makers and researchers to investigate alternatives to conventional petroleum-fuelled internal-combustion-engine vehicles in transportation. Because vehicles that get some or all of their power from an electric drivetrain can have low or even zero emissions of greenhouse gases (GHGs) and urban air pollutants, and can consume little or no petroleum, there is considerable interest in developing and evaluating advanced electric vehicles (EVs), including pure battery-electric vehicles, plug-in hybrid electric vehicles and hydrogen fuel-cell electric vehicles. To help researchers and policy-makers assess the potential of EVs to mitigate climate change and reduce petroleum use, this paper discusses the technology of EVs, the infrastructure needed for their development, impacts on emissions of GHGs, petroleum use, materials use, lifetime costs, consumer acceptance and policy considerations.

  10. Untersuchung von Verbesserungspotentialen hinsichtlich Verbrauch und Drehmoment bei Ottomotoren mit Hilfe 1-dimensionaler Simulationsrechnung

    OpenAIRE

    Schreiber, Gert

    2006-01-01

    Im Rahmen dieser Arbeit wurden verschiedene Verbesserungspotentiale von Ottomotoren mit besonderer Berücksichtigung von Verbrauch und Drehmoment mit Hilfe der Motorprozeßrechnung untersucht. Insbesondere wurden die Zusammenhänge von Ursache und Wirkung einzelner Verbesserungsmaßnahmen herausgestellt. Zur Modellierung realer Motoren wurde die Simulationssoftware GT-Power verwendet, wobei die Regelung über Matlab/Simulink vorgenommen wurde. Aber auch mit vereinfachten Rechenmodellen, die unter ...

  11. The development of form two mathematics i-Think module (Mi-T2)

    Science.gov (United States)

    Yao, Foo Jing; Abdullah, Mohd Faizal Nizam Lee; Tien, Lee Tien

    2017-05-01

    This study aims to develop a training module i-THINK Mathematics Form Two (Mi-T2) to increase the higher-order thinking skills of students. The Mi-T2 training module was built based on the Sidek Module Development Model (2001). Constructivist learning theory, cognitive learning theory, i-THINK map and higher order thinking skills were the building blocks of the module development. In this study, researcher determined the validity and reliability of Mi-T2 module. The design being used in this study was descriptive study. To determine the needs of Mi-T2 module, questionnaires and literature review were used to collect data. When the need of the module was determined, the module was built and a pilot study was conducted to test the reliability of the Mi-T2 module. The pilot study was conducted at a secondary school in North Kinta, Perak. A Form Two class was selected to be the sample study through clustered random sampling. The pilot study was conducted for two months and one topic had been studied. The Mi-T2 module was evaluated by five expert panels to determine the content validity of the module. The instruments being used in the study were questionnaires about the necessity of the Mi-T2 module for guidance, questionnaires about the validity of the module and questionnaires concerning the reliability of the module. Statistical analysis was conducted to determine the validity and reliability coefficients of the Mi-T2 module. The content validity of Mi-T2 module was determined by Cohen's Kappa's (1968) agreement coefficient and the reliability of Mi-T2 module was determined by Cronbach Alpha's value scale. The content validity of Mi-T2 module was 0.89 and the Cronbach Alpha's value of Mi-T2 module was 0.911.

  12. Delir, postoperative kognitive Verschlechterung und Charles Bonnet-Syndrom bei Patienten mit Kataraktoperationen

    OpenAIRE

    Hämmerl, Thomas

    2005-01-01

    In der Klinik für Augenheilkunde an der TU München wurden 92 Patienten mit Kataraktoperationen zu Delir, postoperativer kognitiver Verschlechterung und Charles Bonnet-Syndrom untersucht. Ein Patient hatte ein Delir bei Aufnahme, keiner entwickelte ein postoperatives Delir. Eine Risikogruppe für einen komplizierten postoperativen Verlauf stellten die Patienten mit präoperativer kognitiver Beeinträchtigung (n=11) und die Patienten mit postoperativer kognitiver Verschlechterung (n=8) dar. Risiko...

  13. Interaktion systemisch wirksamer Antimykotika mit der Aggregation humaner Thrombozyten in vitro

    OpenAIRE

    2011-01-01

    Patienten mit Krebserkrankungen und invasiven Pilzinfektionen haben ein hohes Risiko für Blutungen sowohl aufgrund verminderter Thrombozytenzahlen als auch der Neigung einiger Pilze zur Gefäßarrosion. In dieser Studie wurde Blut von zehn gesunden Freiwilligen in vitro mit den i.v.-Zubereitungen von 11 verschiedenen Antimykotika versetzt. Anschließend wurde die Thrombozytenaggregation mit der Methode der Impedanzaggregometrie untersucht. Amphotericin B Colloidal Dispersion, Amphotericin B ...

  14. Wirksamkeit und Sicherheit von Fumarsäureestern in Kombination mit Phototherapie bei Patienten mit moderater bis schwerer Plaque-Psoriasis (FAST).

    Science.gov (United States)

    Weisenseel, Peter; Reich, Kristian; Griemberg, Wiebke; Merten, Katharina; Gröschel, Christine; Gomez, Natalie Nunez; Taipale, Kirsi; Bräu, Beate; Zschocke, Ina

    2017-02-01

    Die Behandlung von Psoriasis-Patienten mit einer Kombination aus Fumarsäureestern (FSE, Fumaderm(®) ) und Phototherapie (UV) ist verbreitet, wurde aber im Rahmen von Studien wenig untersucht. Bisher liegen lediglich Daten aus einer kleinen Pilotstudie vor. Intention dieser Studie war, eine FSE/UV-Kombinationsbehandlung an einem größeren Patientenkollektiv mit mittelschwerer bis schwerer Psoriasis zu untersuchen. In dieser prospektiven, multizentrischen, nichtinterventionellen Studie wurden Daten von Patienten mit FSE/UV-Kombinationstherapie hinsichtlich der Wirksamkeit (PGA' PASI, DLQI, EQ-5D), Sicherheit und Dosierung über einen Zeitraum von zwölf Monaten erfasst und mit Daten einer retrospektiven Studie mit FSE-Monotherapie verglichen. Es wurden Daten von 363 Patienten ausgewertet. Unter der Kombinationstherapie verbesserten sich alle Wirksamkeitsparameter deutlich. Im Vergleich zur Monotherapie mit FSE konnte durch die Kombination mit UV ein schnellerer Wirkeintritt erzielt werden, wobei nach zwölf Monaten kein Unterschied in der Wirksamkeit bestand. Die Dauer und Art der Phototherapie zeigte keinen Einfluss auf die Wirksamkeitsparameter. Allgemein wurde die Kombinationstherapie gut vertragen. Unerwünschte Ereignisse wurden bei 7 % der Patienten berichtet. Die FSE/UV Kombinationstherapie zeigt eine gute Wirksamkeit und Verträglichkeit und kann zu einem schnelleren Wirkeintritt führen. Eine Kombinationstherapie erscheint vor allem in den ersten drei Monaten der FSE Behandlung sinnvoll. © 2017 Deutsche Dermatologische Gesellschaft (DDG). Published by John Wiley & Sons Ltd.

  15. A Chinese literature overview on ultra-weak photon emission as promising technology for studying system-based diagnostics

    NARCIS (Netherlands)

    He, M.; Sun, M.; Wijk, E. van; Wietmarschen, H. van; Wijk, R. van; Wang, Z.; Wang, M.; Hankemeier, T.; Greef, J. van der

    2016-01-01

    To present the possibilities pertaining to linking ultra-weak photon emission (UPE) with Chinese medicine-based diagnostics principles, we conducted a review of Chinese literature regarding UPE with respect to a systems view of diagnostics. Data were summarized from human clinical studies and animal

  16. Vermicomposting as a technology for reducing nitrogen losses and greenhouse gas emissions from small-scale composting

    NARCIS (Netherlands)

    Nigussie, Abebe; Kuijper, Thomas; Bruun, Sander; Neergaard, de Andreas

    2016-01-01

    Thermophilic composting produces a significant amount of greenhouse gases. The objectives of this study were (i) to evaluate the effectiveness of vermicomposting to reduce nitrogen losses and greenhouse gases emissions compared to thermophilic composting, and (ii) to determine the effect of

  17. Fluorescence Aggregation-Caused Quenching versus Aggregation-Induced Emission: A Visual Teaching Technology for Undergraduate Chemistry Students

    Science.gov (United States)

    Ma, Xiaofeng; Sun, Rui; Cheng, Jinghui; Liu, Jiaoyan; Gou, Fei; Xiang, Haifeng; Zhou, Xiangge

    2016-01-01

    A laboratory experiment visually exploring two opposite basic principles of fluorescence of aggregation-caused quenching (ACQ) and aggregation-induced emission (AIE) is demonstrated. The students would prepared two salicylaldehyde-based Schiff bases through a simple one-pot condensation reaction of one equiv of 1,2-diamine with 2 equiv of…

  18. Net greenhouse gas emissions from manure management using anaerobic digestion technology in a beef cattle feedlot in Brazil

    Energy Technology Data Exchange (ETDEWEB)

    Costa Junior, Ciniro, E-mail: cinirojr@hotmail.com [University of São Paulo, Center of Nuclear Energy in Agriculture, Laboratory of Biogeochemistry, Avenida Centenário, 303, Piracicaba, SP 13416-000 (Brazil); Cerri, Carlos E.P., E-mail: cepcerri@usp.br [University of São Paulo, “Luiz de Queiroz” College of Agriculture, Department of Soil Science, Avenida Pádua Dias, 11, Piracicaba, SP 13418-900 (Brazil); Pires, Alexandre V., E-mail: pires.1@usp.br [University of São Paulo, “Luiz de Queiroz” College of Agriculture, Department of Animal Science, Avenida Pádua Dias, 11, Piracicaba, SP 13418-900 (Brazil); Cerri, Carlos C., E-mail: cerri@cena.usp.br [University of São Paulo, Center of Nuclear Energy in Agriculture, Laboratory of Biogeochemistry, Avenida Centenário, 303, Piracicaba, SP 13416-000 (Brazil)

    2015-02-01

    As part of an agreement during the COP15, the Brazilian government is fostering several activities intended to mitigate greenhouse gas (GHG) emissions. One of them is the adoption of anaerobic digester (AD) for treating animal manure. Due to a lack of information, we developed a case study in order to evaluate the effect of such initiative for beef cattle feedlots. We considered the net GHG emissions (CH{sub 4} and N{sub 2}O) from the manure generated from 140 beef heifers confined for 90 days in the scope “housing to field application” by including field measurements, literature values, and the offset generated by the AD system through the replacement of conventional sources of nitrogen (N) fertilizer and electricity, respectively. Results showed that direct GHG emissions accounted for 0.14 ± 0.06 kg of carbon dioxide equivalent (CO{sub 2}eq) per kg of animal live weight gain (lwg), with ∼ 80% originating from field application, suggesting that this emission does not differ from the conventional manure management (without AD) typically done in Brazil (0.19 ± 0.07 kg of CO{sub 2}eq per kg lwg{sup −1}). However, 2.4 MWh and 658.0 kg of N-manure were estimated to be generated as a consequence of the AD utilization, potentially offsetting 0.13 ± 0.01 kg of CO{sub 2}eq kg lwg{sup −1} or 95% (± 45%) of total direct emissions from the manure management. Although, by replacing fossil fuel sources, i.e. diesel oil, this offset could be increased to 169% (± 47%). In summary, the AD has the potential to significantly mitigate GHG emissions from manure management in beef cattle feedlots, but the effect is indirect and highly dependent on the source to be replaced. In spite of the promising results, more and continuous field measurements for decreasing uncertainties and improving assumptions are required. Identifying shortcomings would be useful not only for the effectiveness of the Brazilian government, but also for worldwide plans in mitigating GHG emissions

  19. Effect of Fuel Wobbe Number on Pollutant Emissions from Advanced Technology Residential Water Heaters: Results of Controlled Experiments

    Energy Technology Data Exchange (ETDEWEB)

    Rapp, Vi H.; Singer, Brett C.

    2014-03-01

    The research summarized in this report is part of a larger effort to evaluate the potential air quality impacts of using liquefied natural gas in California. A difference of potential importance between many liquefied natural gas blends and the natural gas blends that have been distributed in California in recent years is the higher Wobbe number of liquefied natural gas. Wobbe number is a measure of the energy delivery rate for appliances that use orifice- or pressure-based fuel metering. The effect of Wobbe number on pollutant emissions from residential water heaters was evaluated in controlled experiments. Experiments were conducted on eight storage water heaters, including five with “ultra low-NO{sub X}” burners, and four on-demand (tankless) water heaters, all of which featured ultra low-NO{sub X} burners. Pollutant emissions were quantified as air-free concentrations in the appliance flue and fuel-based emission factors in units of nanogram of pollutant emitter per joule of fuel energy consumed. Emissions were measured for carbon monoxide (CO), nitrogen oxides (NO{sub X}), nitrogen oxide (NO), formaldehyde and acetaldehyde as the water heaters were operated through defined operating cycles using fuels with varying Wobbe number. The reference fuel was Northern California line gas with Wobbe number ranging from 1344 to 1365. Test fuels had Wobbe numbers of 1360, 1390 and 1420. The most prominent finding was an increase in NO{sub X} emissions with increasing Wobbe number: all five of the ultra low-NO{sub X} storage water heaters and two of the four ultra low-NO{sub X} on-demand water heaters had statistically discernible (p<0.10) increases in NO{sub X} with fuel Wobbe number. The largest percentage increases occurred for the ultra low-NO{sub X} water heaters. There was a discernible change in CO emissions with Wobbe number for all four of the on-demand devices tested. The on-demand water heater with the highest CO emissions also had the largest CO increase

  20. Kompressionstherapie - Versorgungspraxis: Informationsstand von Patienten mit Ulcus cruris venosum.

    Science.gov (United States)

    Protz, Kerstin; Heyer, Kristina; Dissemond, Joachim; Temme, Barbara; Münter, Karl-Christian; Verheyen-Cronau, Ida; Klose, Katharina; Hampel-Kalthoff, Carsten; Augustin, Matthias

    2016-12-01

    Eine Säule der kausalen Therapie bei Patienten mit Ulcus cruris venosum ist die Kompressionstherapie. Sie unterstützt die Abheilung, reduziert Schmerzen und Rezidive und steigert die Lebensqualität. Bislang existieren kaum wissenschaftliche Daten zu dem Versorgungsstand und fachspezifischem Wissen von Patienten mit Ulcus cruris venosum. Standardisierte Fragebögen wurden bundesweit in 55 Pflegediensten, 32 Arztpraxen, vier Wundzentren und -sprechstunden sowie einem Pflegetherapiestützpunkt von Patienten mit Ulcus cruris venosum bei Erstvorstellung anonym ausgefüllt. Insgesamt nahmen 177 Patienten (Durchschnittsalter 69,4 Jahre; 75,1 % Frauen) teil. Ein florides Ulcus cruris venosum bestand im Mittel 17 Monate. 31,1 % hatten keine Kompressionstherapie, 40,1 % Binden und 28,8 % Strümpfe. Bei der Bestrumpfung hatten 13,7 % Kompressionsklasse III, 64,7 % Kompressionsklasse II und 19,6 % Kompressionsklasse I. 70,6 % legten die Strümpfe nach dem Aufstehen an, 21,1 % trugen sie Tag und Nacht. 39,2 % bereiteten die Strümpfe Beschwerden. Lediglich 11,7 % hatten eine An- und Ausziehhilfe. Die Binden wurden im Mittel 40,7 Wochen getragen und bei 69 % nicht unterpolstert. Bei 2,8 % wurde der Knöchel- und Waden-Umfang zur Erfolgskontrolle gemessen. Venensport machten 45,9 %. Ein Drittel hatte keine Kompressionsversorgung, obwohl diese eine Basismaßnahme der Therapie des Ulcus cruris venosum ist. Zudem ist deren korrekte Auswahl und Anwendung angesichts der langen Bestandsdauer der Ulzerationen zu hinterfragen. Weiterführende Fachkenntnisse bei Anwendern und Verordnern sowie Patientenschulungen sind erforderlich. © 2016 Deutsche Dermatologische Gesellschaft (DDG). Published by John Wiley & Sons Ltd.

  1. Fallstudie zur Informationskompetenz beim Lernen mit neuen Medien

    Directory of Open Access Journals (Sweden)

    Udo Hinze

    2017-08-01

    Full Text Available In der Debatte um die Medienkompetenz werden zunehmend die neuen Medien als unterstützende Mittel im E-Learningprozess thematisiert. Das selbstgesteuerte und flexible E-Learning ist auf eine hohe Handlungskompetenz der Lernenden angewiesen. Diese umfasst insbesondere die Fähigkeit, Informationen zu recherchieren, zu evaluieren und zu reduzieren. In einer Fallstudie wird exemplarisch aufgezeigt, wie sich divergente Kompetenz im Umgang mit Informationen manifestiert. Außerdem werden die Auswirkungen auf den Lernerfolg, die Lernzufriedenheit und die Nutzungsmodi der Medien dargestellt.

  2. Mit Mathematik zu Mehr Intelligenz in der Logistik

    Science.gov (United States)

    Möhring, Rolf H.; Schenk, Michael

    Die Lösung logistischer Probleme ist ein wichtiger Aspekt menschlichen Handelns seit Menschen gemeinsam zielgerichtet tätig wurden. Die Grundlagen dessen, was wir heute Logistik nennen, entstammen dem militärischen Bereich. So basierte z. B. das römische Imperium in starkem Maße auf militärisch-logistischen Glanzleistungen. Ob damals bereits mathematische Überlegungen eine Rolle spielten, wissen wir heute nicht. Jedoch versuchte z. B. Napoleon, der mit den bedeutendsten Mathematikern seiner Zeit befreundet war, den Transport seiner Truppen und die Verbreitung von Informationen zu optimieren und strategisch einzusetzen.1,2

  3. Therapie des metastasierten kastrationsresistenten Prostatakarzinoms mit Abirateronacetat im klinischen Alltag.

    Science.gov (United States)

    Wolff, Johannes Maria

    2017-01-01

    Abirateronacetat, das in Kombination mit Prednison/Prednisolon verabreicht wird, spielt eine wichtige Rolle in der Therapie des metastasierten kastrationsresistenten Prostatakarzinoms. Im Folgenden wurden besondere Aspekte der Therapie im klinischen Alltag zusammengestellt. Sie betreffen unter anderem die Dosierung - auch vor dem Hintergrund der Markteinführung einer neuen Formulierung von Abirateronacetat. Hinzu kommt die Verträglichkeit, vor allem in Bezug auf kardiovaskuläre und Kortikoid-bedingte Nebenwirkungen. Des Weiteren werden Kriterien genannt, nach denen die Therapie nicht zu früh umgestellt werden sollte. © 2017 S. Karger GmbH, Freiburg.

  4. Antikoagulation bei Vorhofflimmern: Wie und mit welchem Medikament?

    Directory of Open Access Journals (Sweden)

    Gary T

    2015-01-01

    Full Text Available Direkte orale Antikoagulantien (DOAKs sind Alternativen zu Vitamin-K-Antagonisten (VKA bei Vorhofflimmerarrhythmie- (VHFA- Patienten und werden diese in dieser Indikation zu weiten Teilen ersetzen. Bei VHFA-Patienten mit Dialyse oder mechanischen Herzklappen sind VKA nach wie vor die einzige Option. Bei der Gabe von DOAKs sollte vor Therapieeinleitung auf das Vorhandensein von Begleiterkrankungen (z. B. Niereninsuffizienz, stattgehabte gastrointestinale Blutungen etc. sowie auf die Begleittherapie der Patienten (z. B. Amiodaron etc. geachtet werden, um die passende Substanz in der richtigen Dosierung zu wählen.

  5. Innovative facades with photovoltaics; Innovative Fassaden mit Photovoltaik

    Energy Technology Data Exchange (ETDEWEB)

    Eicker, U. [Hochschule fuer Technik, Stuttgart (Germany)

    1999-10-01

    Having grown at a rate of 15% since the middle of the 1980s the photovoltaic market today commands an annual module production of more than 100 MW{sub p}. In Germany altogether 10,000 PV systems with a total power output of 10 MW{sub p} were newly installed in 1997 alone. In 1990 the market was boosted by the heavily subsidised 1000 roofs programme, under which in the end more than 2,000 systems were installed on the roofs of mostly one-family houses. With power ratings ranging from 1 to 5 kW these decentral plants require roof surface areas between 10 and 50 m-2. On average they generate 800 kWh of electricity per kW of installed power. According to a number of studies carried out in the early 1990s the total surface area on buildings available for photovoltaics amounts to an enormous potential of 1,000 km-2, which is equivalent to an electricity generating potential of 130 TWh (100 TWh on roofs and 30 TWh on facades), or 25% of Germany`s total electricity demand. The degree to which this potential will be realised in the long term will notably depend on whether convincing architectural solutions are found for integrating photovoltaic plants in roofs and facades. [Deutsch] Der Photovoltaikmarkt waechst weltweit seit Mitte der 80er Jahre um durchschnittlich 15% und liegt heute bei einer Jahresmodulproduktion ueber 100 MW{sub p}. In Deutschland wurden alleine 1997 etwa 10.000 PV-Systeme mit einer Gesamtleistung von 10 MW{sub p} installiert. Die Marktentwicklung wurde 1990 mit dem stark subventionierten 1000-Daecher Programm angestossen, in welchem schliesslich mehr als 2000 Systeme meist auf Daechern von Einfamilienhaeusern installiert wurden. Diese dezentralen Anlagen mit Leistungen zwischen 1 und 5 kW erfordern Dachflaechen zwischen 10 und 50 m{sup 2} und erzeugen im Schnitt 800 kWh Strom pro kW installierter Leistung. Das verfuegbare Flaechenpotential von Gebaeuden wurde Anfang der 90er Jahre in einer Reihe von Studien ermittelt und stellt mit etwa 1000 km{sup 2

  6. Content Management von Leittexten mit XML Topic Maps

    Directory of Open Access Journals (Sweden)

    Johannes Busse

    2003-07-01

    Full Text Available Die Autoren definieren den Umgang mit internet- basierten Informations- und Kommunikationstechnologien als Schlüsselqualifikation für Studierende aller Fachrichtungen. Im vorliegenden Aufsatz beschreiben sie ein Projekt, das der Fachbereich Erziehungswissenschaften der Universität Heidelberg seit 2001 durchführt. Hier werden Studierende der Geistes- und Sozialwissenschaften zu "Lernberatern" ausgebildet, die als Multiplikatoren die notwendigen Kenntnisse erwerben. Die Teilnehmenden erarbeiten nach der "Leittextmethode" selbstgesteuert xml-basierte Contents. Dies setzt den Erwerb von informationstechnischen Kenntnissen voraus, der neben dem Aufbau eines (sowohl technischen als auch sozialen Netzwerks einen Schwerpunkt bildet.

  7. A Single Channel Measurement Svstem For Brain MIT

    Institute of Scientific and Technical Information of China (English)

    QINMing-xing; JIAOLi-cheng; WANGCong; LIShi-jun; DONGXiu-zhen; LUHua

    2004-01-01

    A single channel measurement system for brain MIT has been built. The system is composed of an exciting source unit, a detecting unit, a rotating and controlling unit, and imaging unit. The experiment results of single channel measurements show that the system output versus the conductivity of the objects was an approximate linear relationship when the diameter of an object was about 9cm and its conductivity was in 0.1 S/m, 0.7 S/m, 2S/m, 6S/m. The sensitivit yof the phase detector was 53 mV/degree from -10 to+10 degree.

  8. Patron-Driven Acquisition (PDA - ein Modell mit Zukunft?

    Directory of Open Access Journals (Sweden)

    Rainer Plappert

    2015-12-01

    Full Text Available Gestützt auf eine dreijährige Erfahrung mit der nutzergesteuerten Erwerbung an der UB Erlangen-Nürnberg beleuchtet der Beitrag die verschiedenen Rollen der an dieser Erwerbungsform beteiligten Akteure. Vor dem Hintergrund geänderter Geschäftsmodelle werden die zukünftigen Perspektiven der nutzergesteuerten Erwerbung in Deutschland kritisch hinterfragt. Based on a three years experience with Patron-Driven Acquisition at University library Erlangen-Nuremberg the article discusses the roles of the protagonists at this acquisition form. Regarding to modified business models the perspectives of Patron-Driven Acquision in Germany seems to be unconfident.

  9. Kaufbereitschaft für Lebensmittel mit Claims

    DEFF Research Database (Denmark)

    Aschemann-Witzel, Jessica

    2010-01-01

    Auf Lebensmitteln finden sich zunehmend nährwert- und gesundheitsbezogene Angaben ("Health Claims"). Oft sind diese nach Ansicht der Verbraucherorganisationen missverständlich und irreführend. Dem soll die neue EU-Verordnung EG 1934/2006 Abhilfe schaffen. Die Forschung zu Konsumentenverhalten und...... Claims ist jedoch noch lückenhaft. Eine Studie zeigt, dass Lebensmittel mit Claims bevorzugt gewählt und positiv beurteilt werden. Dies unterstreicht die Wichtigkeit des Einbezugs der Verbraucherperspektive bei der Gesetzgebung zu Lebensmittelinformationen....

  10. Programmierung graphischer Benutzerschnittstellen mit Tcl/Tk. - 4. Aufl.

    OpenAIRE

    Wegner, Lutz

    2009-01-01

    Das hier frei verfügbare Skript und die Sammlung an Klausuren mit Musterlösungen aus den Jahren 2005 bis 2015 geht auf die gleichnamige Vorlesung im Masterstudium Informatik an der Universität Kassel zurück. Kenntnisse in der Programmierung graphischer Oberflächen sind offensichtlich sehr nützlich, da es kaum noch Anwendungen gibt, die auf eine ansprechend gestaltete Benutzeroberfläche verzichten können. Andererseits ist die Programmierung auch heute noch sehr aufwendig. Als Ausweg empfiehlt ...

  11. Mobile Diabetes Management for USAF Active and Retired Military Spouses: Lessons Learned in the Integration of Mobile Integrated Therapies (MIT) into Electronic Medical Records (EMR)

    Science.gov (United States)

    2013-09-24

    MIT, regardless of the environment. Also, when the patient’s device, which may integrate such emerging technologies as NFC ( near - field ...results from External Field Tests  Conducted and documented results from User Acceptance Tests  Reviewed and documented a Clinical Assessment of...Grotz K, Castro C, Bindman AB Closing the loop: physician communication with diabetic patients who have low health literacy. Arch Intern Med. 2003

  12. Rehabilitation of deaf persons with cochlear implants; Rehabilitation Hoergeschaedigter mit Cochlearimplantaten

    Energy Technology Data Exchange (ETDEWEB)

    Gstoettner, W.; Hamzavi, J. [Universitaetsklinik fuer Hals-Nasen-Ohrenheilkunde, Wien (Austria); Czerny, C. [Universitaetsklinik fuer Radiologie, Wien (Austria)

    1997-12-01

    In the last decade, the rehabilitation of postlingually deaf adults and prelingually deaf children with cochlear implants has been established as a treatment of deafness. The technological development of the implant devices and improvement of the surgical technique have led to a considerable increase of hearing performance during the last years. The postlingually deaf adults are able to use the telephone and may be integrated in their original job. Prelingually deaf children can even visit normal schools after cochlear implantation and hearing rehabilitation training. In order to preoperatively establish the state of the cochlear, radiological diagnosis of the temporal bone is necessary. High resolution computerized tomography imaging of the temporal bone with coronar and axial 1 mm slices and MRI with thin slice technique (three dimensional, T2 weighted turbo-spinecho sequence with 0.7 mm slices) have proved to be valuable according to our experience. Furthermore a postoperative synoptical X-ray, in a modified Chausse III projection, offers good information about the position of the implant and insertion of the stimulating electrode into the cochlea. (orig.) [Deutsch] In der letzten Dekade hat sich der operative Einsatz von Cochlearimplantaten fuer die Rehabilitation taubgeborener Kinder und ertaubter Erwachsenen als erfolgreiche Therapie etabliert. Durch technische Weiterentwicklung der Implantatsysteme und Verbesserung der Operationstechnik konnten in den letzten Jahren die Hoerleistungen der Patienten deutlich verbessert werden. Postlingual ertaubte Erwachsene koennen nun oftmals wieder ins Berufsleben eingegliedert werden und praelingual ertaubte Kinder koennen regulaere Schulen besuchen. Im Rahmen der Voruntersuchung fuer die Cochlearimplantation ist die radiologische Felsenbeindiagnostik von besonderer Bedeutung. Hochaufloesendes CT des Felsenbeins in koronaren und axialen Ebenen mit 1 mm Schichtdicke und MRT in Duennschichttechnik (dreidimensionale, T2

  13. Benefits of using biogas technology in rural area: karo district on supporting local action plan for greenhouse gas emission reduction of north sumatera province 2010-2020

    Science.gov (United States)

    Ginting, N.

    2017-05-01

    Indonesia committed to reduce its greenhouse gas (GHG) by 26% in 2020. At the UNFCCC (Conference of the United Nation Framework Convention on Climate Change) held in Paris in December 2015 Indonesia committed to reduce GHG; one way by promoting clean energy use for example biogas. Agricultural industry produces organic waste which contributes to global warming and climate change. In Karo District, mostly the people were farmers, either horticulture or fruit and produces massive organic waste. Biogas research was conducted in Karo District in May until July 2016 used 5 biodigesters. The purpose was to determine benefits of using biogas technology in order to reduct GHG emissions. The used design was Completely Randomized Design (CRD) with treatments: T1 (100% cow feces), T2 (75% cow feces + 25% horticultural waste), T3 (50% cow feces + 50% horticultural waste), T4 (25% cow feces + 75% horticultural waste) and T5 (100% horticultural waste). Parameter research were gas production, pH and temperature. The research result showed that T1 produced the highest methane ( Pbiogas on agricultural waste supported local action plan for greenhouse gas emission reduction of North Sumatera Province 2010-2020. From horticultural waste, there were 2.1 × 106 ton CO2 eq in 2014 which were not calculated in RAD GRK (Regional Action Plan for Greenhouse Gas Emissions Reduction).

  14. Emissions Performance and In-Use Durability of Retrofit After-Treatment Technologies (SAE Paper 2014-01-2347)

    Science.gov (United States)

    In-use testing of diesel emissoin control technologies is an integral component of EPA's verification program. EPA identified and recovered a variety of retrofit devices, installed on heavy-duty vehicles for test.

  15. Waste decomposition and off-gas emissions of dry, single-stage anaerobic digestion processes followed by a composting stage: The example of the KOMPOGAS process; Abbauleistung und Abluftemissionen bei trockenen, einstufigen Vergaerungsverfahren mit nachgeschalteter Rotte am Beispiel des KOMPOGAS-Verfahrens

    Energy Technology Data Exchange (ETDEWEB)

    Fricke, K. [Technische Univ. Braunschweig (Germany). Leichtweiss-Institut fuer Wasserbau; Leisner, R. [KOGAS AG, Uzwil (Switzerland); Wallmann, R. [Ingenieurgemeinschaft Witzenhausen, Fricke und Turk GmbH, Witzenhausen (Germany)

    2001-07-01

    The working group IGW/LWI (Ingenieurgemeinschaft Witzenhausen Fricke and Turk GmbH and Leichtweiss Institute of TU Brunswick University) carried out scientific and technical investigations of anaerobic digestion and subsequent composting at the mechanical-biological waste treatment plant at Kufstein/Tyrol on behalf of KOGAS GmbH. The investigations started in May 2000; they were to provide information for analysis and optimisation of the process and products with a view to the minimisation of residues for dumping or incineration. The following subjects were investigated: Mass balance; decomposition rate; gas yields and gas quality; quality of residues for dumping (biological stability and calorific value); off-gas emissions; process control. Performance data of the plant will provide a basis for further planning and will be interpreted against the background of current legal boundary conditions. [German] Die Arbeitsgemeinschaft IGW/LWI (Ingenieurgemeinschaft Witzenhausen Fricke and Turk GmbH und Leichtweiss-Institut der TU Braunschweig) wurde im Mai 2000 von der KOGAS GmbH beauftragt, die wissenschaftlich-technische Begleitung eines Versuches zur Vergaerung und Nachrotte von Restmuell auf dem Gelaende der MBA Kufstein/Tirol durchzufuehren. Ziel der Untersuchung war die Ueberpruefung und Optimierung des Vergaerungs- und Nachrotteprozesses sowie der Materialaufbereitung und Konfektionierung im Hinblick auf die Minimierung von Stofffluessen in die energetische Verwertung bzw. thermische Behandlung. Im Rahmen des Vorhabens wurden folgende Thermokomplexe bearbeitet: - Massenbilanz, - Abbauleistung, - Gasertrag und Gasqualitaet, - Qualitaet der zu deponierenden Abfaelle (biologische Stabilitaet und Heizwert), - Abluftemissionen, - Prozesssteuerung. Leistungsdaten der Verfahren sollten als Planungsgrundlagen bereitgestellt und vor dem Hintergrund der aktuellen rechtlichen Rahmenbedingungen bewertet werden. (orig.)

  16. CONTAMINATION AND EMISSION REDUCTION TECHNOLOGIES OF ETHYLENE CRACKING FURNACE%乙烯裂解炉污染物及减排技术

    Institute of Scientific and Technical Information of China (English)

    李昌力; 李进锋

    2013-01-01

    This paper introduces different contamination types of ethylene cracking furnace. It makes a systematic introduction to the emission reduction technologies of sulfide (SOx), nitrogen oxides (NOx) ,particulate matter (coke) ,carbon dioxide (CO2) and noise. NOx reduction is discussed as a key point including pre-burning treatment, low NOx burners and after burning treatment together with different decoking drum type and associated particle reduction. Meanwhile, the paper presents some thoughts and suggestions on the future research direction and key points for emission reduction technologies of cracking furnace.%介绍了乙烯裂解炉污染物排放的种类,对硫化物、氮氧化物、颗粒物、CO2和噪音的减排措施进行了系统的介绍.着重介绍了氮氧化物的减排技术,包括燃烧前、燃烧中及燃烧后的不同减排技术在乙烯裂解炉上的应用,以及不同清焦罐对颗粒物的脱除效果.并对乙烯裂解炉减排今后研究的方向及重点提出了建议.

  17. An integrated assessment modeling framework for uncertainty studies in global and regional climate change: the MIT IGSM-CAM (version 1.0)

    Science.gov (United States)

    Monier, E.; Scott, J. R.; Sokolov, A. P.; Forest, C. E.; Schlosser, C. A.

    2013-12-01

    This paper describes a computationally efficient framework for uncertainty studies in global and regional climate change. In this framework, the Massachusetts Institute of Technology (MIT) Integrated Global System Model (IGSM), an integrated assessment model that couples an Earth system model of intermediate complexity to a human activity model, is linked to the National Center for Atmospheric Research (NCAR) Community Atmosphere Model (CAM). Since the MIT IGSM-CAM framework (version 1.0) incorporates a human activity model, it is possible to analyze uncertainties in emissions resulting from both uncertainties in the underlying socio-economic characteristics of the economic model and in the choice of climate-related policies. Another major feature is the flexibility to vary key climate parameters controlling the climate system response to changes in greenhouse gases and aerosols concentrations, e.g., climate sensitivity, ocean heat uptake rate, and strength of the aerosol forcing. The IGSM-CAM is not only able to realistically simulate the present-day mean climate and the observed trends at the global and continental scale, but it also simulates ENSO variability with realistic time scales, seasonality and patterns of SST anomalies, albeit with stronger magnitudes than observed. The IGSM-CAM shares the same general strengths and limitations as the Coupled Model Intercomparison Project Phase 3 (CMIP3) models in simulating present-day annual mean surface temperature and precipitation. Over land, the IGSM-CAM shows similar biases to the NCAR Community Climate System Model (CCSM) version 3, which shares the same atmospheric model. This study also presents 21st century simulations based on two emissions scenarios (unconstrained scenario and stabilization scenario at 660 ppm CO2-equivalent) similar to, respectively, the Representative Concentration Pathways RCP8.5 and RCP4.5 scenarios, and three sets of climate parameters. Results of the simulations with the chosen

  18. Helicobacter sp. MIT 01-6451 infection during fetal and neonatal life in laboratory mice.

    Science.gov (United States)

    Yamanaka, Hitoki; Nakanishi, Tai; Takagi, Toshikazu; Ohsawa, Makiko; Kubo, Noriaki; Yamamoto, Naoto; Takemoto, Takahira; Ohsawa, Kazutaka

    2015-01-01

    Helicobacter sp. MIT 01-6451 has been detected in SPF mice kept in Japan. To characterize strain MIT 01-6451, its infection route during fetal and neonatal life and effects on pregnancy were investigated using immunocompetent and immunodeficient mouse strains (BALB/c, C57BL/6, and SCID). MIT 01-6451 was detected in the uterus, vagina, and mammary glands of 50% of infected SCID mice, whereas these tissues were all negative in immunocompetent mice. No fetal infections with MIT 01-6451 were detected at 16-18 days after pregnancy in any mouse strain. In newborn mice, MIT 01-6451 was detected in intestinal tissue of C57BL/6 and SCID mice at 9-11 days after birth, but not in BALB/c mice. The IgA and IgG titers to MIT 01-6451 in sera of C57BL/6 female mice were significantly lower than those of BALB/c mice. Although no significant differences in the number of newborns per litter were observed between MIT 01-6451-infected and MIT 01-6451-free dams, the birth rate was lower in infected SCID mice than in control SCID mice. The present results indicated that MIT 01-6451 infects newborn mice after birth rather than by vertical transmission to the fetus via the placenta and that MIT 01-6451 infection shows opportunistically negative effects on the birth rate. In addition, the maternal immune response may affect infection of newborn mice with MIT 01-6451 through breast milk.

  19. Abatement Technologies for Volatile Organic Compounds in Emissions from Biofuel Driers; Reningsteknik foer organiska aemnen i utslaepp till luft vid biobraensletorkning

    Energy Technology Data Exchange (ETDEWEB)

    Nielsen, Karin; Ehrstedt, Thomas [Sycon Energikonsult AB, Malmoe (Sweden)

    2000-06-01

    This report is a part of a program at Vaermeforsk called Drying of Biofuels and deals with abatement technologies for volatile organic compounds (VOC) in biofuel drier emissions. The report gives an account of the amount of organic matter in wood and in drying gases and also of different abatement technologies for VOC. Processes from about 20 contractors are briefly described. The conclusions from this work are that thermal or catalytic oxidizing technologies in connection with regenerative heat recovery seems to be the most suitable technique for this application. Both technologies should give a degree of purification above 95 %. The purification cost for a typical case has been estimated to about 22 SEK per kg removed organic matter in both cases. The investment cost is higher for the catalytic oxidizer (6-20 MSEK for a 60.000 Nm{sup 3} /h catalytic plant compared to 4-6,5 MSEK for a thermal plant) but the fuel cost is lower. Condensation is a usable technique but it suffers from bad degree of purification. By using a wet electrostatic precipitator (WESP) the degree of purification can be enhanced but it will still be lower than for the oxidizers. Adsorption and absorption are not suitable for gases at high temperatures containing several different organic compounds at low concentrations, which is the case in biofuel drying. This means high purification costs and low degree of purification. Other technologies that have been found less suitable are biological purification and membrane technology. World-wide there are a few reference plants based on thermal oxidizing in connection with biofuel drying. Otherwise the experiences are very limited. According to this, tests in pilot plant scale are recommended before investment in a full-scale plant for biofuel driers.

  20. Technology.

    Science.gov (United States)

    Online-Offline, 1998

    1998-01-01

    Focuses on technology, on advances in such areas as aeronautics, electronics, physics, the space sciences, as well as computers and the attendant progress in medicine, robotics, and artificial intelligence. Describes educational resources for elementary and middle school students, including Web sites, CD-ROMs and software, videotapes, books,…

  1. Quark Orbital Angular Momentum in the MIT Bag Model

    CERN Document Server

    Courtoy, A

    2016-01-01

    We present the results for the Generalized Transverse Momentum Distribution related to quark Orbital Angular Momentum, {\\it i.e.} $F_{14}$, in the MIT bag model. This model has been modified to include the Peierls--Yoccoz projection to restore translational invariance. Such a modification allows to fulfill more satisfactorily basic sum rules, that would otherwise be less elegantly carried out with the original version. Using the same model, we have calculated the twist-$3$ GPD that corresponds to Orbital Angular Momentum \\`a la Ji, through the Penttinen--Polyakov--Shuvaev--Strikman sum rule. Recently, a new relation between the two definitions of the quark Orbital Angular Momentum at the density level has been proposed, which we illustrate here within the model. The sum rule is fulfilled. Still within the framework of the MIT bag model, we analyze the Wandzura--Wilczek expression for the GPD of interest. The genuine quark-gluon contribution is evaluated directly thanks to the equation of motion of the bag, wh...

  2. Treatment planning with functional MRI; Strahlentherapieplanung mit der funktionellen MRT

    Energy Technology Data Exchange (ETDEWEB)

    Georg, P. [EBG MedAustron GmbH, Wiener Neustadt (Austria); Medizinische Universitaet Wien, Christian Doppler Labor fuer die Medizinische Strahlenforschung, Wien (Austria); Andrzejewski, P.; Georg, D. [Medizinische Universitaet Wien, Christian Doppler Labor fuer die Medizinische Strahlenforschung, Wien (Austria); Medizinische Universitaet Wien, Abteilung fuer medizinische Strahlenphysik, Univ. Klinik fuer Strahlentherapie, Wien (Austria); Pinker, K. [Medizinische Universitaet Wien, Christian Doppler Labor fuer die Medizinische Strahlenforschung, Wien (Austria); Medizinische Universitaet Wien, Abteilung fuer molekulare Bildgebung, Univ. Klinik fuer Radiologie und Nuklearmedizin, Wien (Austria)

    2015-12-15

    The aim of magnetic resonance imaging (MRI) guided radiotherapy is high precision in treatment delivery. With new developments it is possible to focus the high dose irradiation on the tumor while sparing the surrounding tissue. The achievements in precision of the treatment planning and delivery warrant equally precise tumor definition. In conventional radiation therapy it is necessary to carry out a planning computed tomography (CT). For many tumors there is also need for an additional morphological MRI because of more accurate tumor definition. In standard radiotherapy the tumor volume is irradiated with a homogeneous dose. The aim of functional multiparametric MRI is to visualize and quantify biological, physiological and pathological processes at the cellular and molecular levels. Based on this information it is possible to elucidate tumor biology and identify subvolumes of more aggressive behavior. They are often radiotherapy-resistant, leading to tumor recurrence thus requiring further dose escalation. The concept of inhomogeneous tumor irradiation according to its biological behavior is called dose painting. Dose painting is technically feasible. The expected clinical benefit is motivated by selective treatment adaptations based on biological tumor characteristics. Tumors show variable response to therapy underlining the need for individual treatment plans. This approach may lead not only to higher local control but also to better sparing of normal surrounding tissue. With the clinical implementation of dose painting, improvements in the therapeutic outcome can be expected. Due to the existing technical challenges, extensive collaboration between radiation oncologists, radiologists, medical physicists and radiation biologists is needed. (orig.) [German] Die Strahlentherapieplanung mit der funktionellen Magnetresonanztomographie (fMRT) zielt auf eine Hochpraezisionsradiotherapie ab. Mit den modernen Technologien ist es moeglich, die Strahlentherapie nahezu

  3. Design and characterization of a multi-beam micro-CT scanner based on carbon nanotube field emission x-ray technology

    Science.gov (United States)

    Peng, Rui

    In this dissertation, I will present the results for my Ph.D. research for the past five years. My project mainly focuses on advanced imaging applications with a multi-beam x-ray source array based on carbon nanotube field emission technology. In the past few years, research in carbon nanotubes gradually changed from the raw material science to its application. Field emission x-ray application is one of the hottest research areas for carbon nanotube. Compared to traditional thermionic x-ray sources, the carbon nanotube field emission x-ray source has some natural advantages over traditional thermionic x-ray sources such as instantaneous x-ray generation, programmability and miniaturization. For the past few years, the research and development of carbon nanotube field emission x-ray has shifted from single x-ray beam applications to spatially distributed multi-beam x-ray sources. Previously in Zhou group, we have already built a gated micro-CT system with single beam micro-focus x-ray tube for higher spatial and temporal resolution as required in live animal imaging and a multi-beam tomosynthesis system targeting for faster and more stable breast imaging. Now my project mainly focused on the design, characterization and optimization of a multi-beam micro-CT imaging system. With the increase of gantry rotation speed approaching the mechanical limit, it is getting more and more difficult to further speed up the CT scanning. My new system promises a potential solution for the problem, and it serves as a great test platform for truly stationary micro-CT geometry. The potential capabilities it showed during the characterization and imaging measurements was promising. The dissertation is composed of five chapters. In Chapter 1, I will generally review the physics principles of x-ray generation and interaction with matter. Then the discovery of carbon nanotube and its great potential to serve as an excellent field emission electron source will be introduced in the second

  4. Contactless measurement of phase and concentration distributions in bubble columns using positron emitting radionuclides; Beruehrungslose Messung von Phasen- und Konzentrationsverteilungen in Blasensaeulen mit positronenemittierenden Radionukliden

    Energy Technology Data Exchange (ETDEWEB)

    Zippe, C.; Hoppe, D.; Fietz, J.; Hampel, U.; Hensel, F.; Maeding, P.; Prasser, H.M.; Zippe, W.

    2003-09-01

    Positron emission tomography (PET) is a well-established method for studying metabolic processes in humans and in use as a medical diagnostic procedure (metabolism, blood perfusion, metastasis detection). The present project was dedicated to a nonmedical application of this imaging method, namely to the development and use of a PET tomograph for studying the behaviour of foam in bubble columns on the ''SchaumPET'' test stand. This paper deals in particular with the technical realisation of the project and the image acquisition methods used. The capacity of positron emission tomography to detect the accumulation of a surfactant in a foam layer is demonstrated for the example of sodium capronate. [German] Die Positronen-Emissions-Tomographie (PET) ist eine etablierte Untersuchungsmethode zur Untersuchung von Stoffwechselvorgaengen im Menschen und wird als medizinisches Diagnoseverfahren (Stoffwechsel, Durchblutung, Metastasenerkennung) eingesetzt. Dieses Projekt beschaeftigt sich mit einer nichtmedizinischen Anwendung dieses bildgebenden Verfahrens - dem Aufbau und der Anwendung eines PET-Tomographen zur Untersuchung des Verhaltens von Schaum in Blasensaeulen, dem Versuchsstand SchaumPET. Insbesondere wird auf die technische Realisierung des Projektes und die angewendeten Verfahren zur Bildgewinnung eingegangen. Am Beispiel von Natriumcapronat wird gezeigt, dass sich die Anreicherung eines Tensids in einer Schaumschicht mit der Positronen-Emissions-Tomographie nachweisen laesst. (orig.)

  5. Messung der Vorwärts-Rückwärts-Ladungsassymetrie von b-Quarks bei Energien nahe der Z0-Resonanz. Untersuchung von Ereignissen mit initialem b-Quark unter Verwendung der Jetladungstechnik mit dem DELPHI Detektor

    CERN Document Server

    Schwering, Britta

    Messung der Vorwärts-Rückwärts-Ladungsassymetrie von b-Quarks bei Energien nahe der Z0-Resonanz. Untersuchung von Ereignissen mit initialem b-Quark unter Verwendung der Jetladungstechnik mit dem DELPHI Detektor

  6. Combined cycle power plant with circulating fluidized bed combustion. Final report; Kombikraftwerk mit zirkulierender Druckwirbelschicht-Feuerung. Abschlussbericht

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1994-05-01

    In the frame of this study the concept of a combined cycle power plant with circulating fluidized bed combustion was investigated for the application of national brown coal. The aims of this study which is subsidised by the FMTR are the following: - evaluation of the experiences which have been made so far in the frame of developing circulating fluidized bed combustion; - reaching of reliable statements about the process technology, about technical risks as well as about the time frame and the costs; - developing a task for a possible realisation of a 150 MW{sub el}-pilot plant in the new Laender. The present study shows that combined cycle power plants which are fuelled by brown coal can be realised according to the principle of circulating fluidized bed combustion with a plant net efficiency of 45% for a power of 150 MW{sub el} (pilot plant) and a plant net efficiency clearly above 47% for a power of 500 MW{sub el} (reference power plant). The combination of this efficient combined cycle power plant technology with a simple brown coal gasification module, that is integrated into a combustion reactor will almost certainly lead to plant net efficiencies of 50% and more, especially for ZDSWF plants of the second generation. (orig./GL) [Deutsch] Im Rahmen dieser Studie ist fuer den Einsatz einheimischer Braunkohle das Konzept eines Kombikraftwerkes auf der Basis der zirkulierenden Druckwirbelschichtfeuerung untersucht worden. Ziele dieser mit BMFT-Mitteln gefoerderten Studie sind: - die Bewertung der bisher im Rahmen der Entwicklung von Druckwirbelschichtfeuerungen gesammelten Erfahrungen, - die Gewinnung belastbarer Aussagen zum verfahrenstechnischen Konzept, zu technischen Risiken sowie zum Zeit- und Kostenrahmen sowie - die Ausarbeitung einer Aufgabenstellung fuer die moegliche Realisierung einer 150-MW{sub el}-Pilotanlage in den neuen Bundeslaendern. Die vorliegende Studie zeigt, dass mit Braunkohle befeuerte Kombikraftwerksanlagen nach dem Prinzip der

  7. Rapid-Prototyping hydraulisch härtender Calcium- und Magnesiumphosphatzemente mit lokaler Wirkstoffmodifikation

    OpenAIRE

    2012-01-01

    Ziel dieser Arbeit war die Herstellung individuell formbarer Strukturen mittels des 3D-Pulverdrucks auf Basis von bei Raumtemperatur hydraulisch abbindenden Knochenzementpulvern. Neben der Entwicklung neuartiger Zementformulierungen auf Basis von Magnesiumphosphaten war vor allem die gleichzeitige Ausstattung der Werkstoffe mit temperaturlabilen und bioaktiven Verbindungen ein wichtiger Entwicklungsschritt. Die Lokalisation der Wirkstoffe korreliert dabei mit entsprechenden Farbinformationen ...

  8. MIT(1), a black mamba toxin with a new and highly potent activity on intestinal contraction.

    Science.gov (United States)

    Schweitz, H; Pacaud, P; Diochot, S; Moinier, D; Lazdunski, M

    1999-11-19

    Mamba intestinal toxin (MIT(1)) isolated from Dendroaspis polylepis venom is a 81 amino acid polypeptide cross-linked by five disulphide bridges. MIT(1) has a very potent action on guinea-pig intestinal contractility. MIT(1) (1 nM) potently contracts longitudinal ileal muscle and distal colon, and this contraction is equivalent to that of 40 mM K(+). Conversely MIT(1) relaxes proximal colon again as potently as 40 mM K(+). The MIT(1)-induced effects are antagonised by tetrodotoxin (1 microM) in proximal and distal colon but not in longitudinal ileum. The MIT(1)-induced relaxation of the proximal colon is reversibly inhibited by the NO synthase inhibitor L-NAME (200 microM). (125)I-labelled MIT(1) binds with a very high affinity to both ileum and brain membranes (K(d)=1.3 pM and 0.9 pM, and B(max)=30 fmol/mg and 26 fmol/mg, respectively). MIT(1) is a very highly selective toxin for a receptor present both in the CNS and in the smooth muscle and which might be an as yet unidentified K(+) channel.

  9. MIT domain of Vps4 is a Ca2+-dependent phosphoinositide-binding domain.

    Science.gov (United States)

    Iwaya, Naoko; Takasu, Hirotoshi; Goda, Natsuko; Shirakawa, Masahiro; Tanaka, Toshiki; Hamada, Daizo; Hiroaki, Hidekazu

    2013-05-01

    The microtubule interacting and trafficking (MIT) domain is a small protein module that is conserved in proteins of diverged function, such as Vps4, spastin and sorting nexin 15 (SNX15). The molecular function of the MIT domain is protein-protein interaction, in which the domain recognizes peptides containing MIT-interacting motifs. Recently, we identified an evolutionarily related domain, 'variant' MIT domain at the N-terminal region of the microtubule severing enzyme katanin p60. We found that the domain was responsible for binding to microtubules and Ca(2+). Here, we have examined whether the authentic MIT domains also bind Ca(2+). We found that the loop between the first and second α-helices of the MIT domain binds a Ca(2+) ion. Furthermore, the MIT domains derived from Vps4b and SNX15a showed phosphoinositide-binding activities in a Ca(2+)-dependent manner. We propose that the MIT domain is a novel membrane-associating domain involved in endosomal trafficking.

  10. Assessing International Product Design and Development Graduate Courses: The MIT-Portugal Program

    Science.gov (United States)

    Dori, Yehudit Judy; Silva, Arlindo

    2010-01-01

    The Product Design and Development (PDD) course is part of the graduate curriculum in the Engineering Design and Advanced Manufacturing (EDAM) study in the MIT-Portugal Program. The research participants included about 110 students from MIT, EDAM, and two universities in Portugal, Instituto Superior Técnico-Universidade Técnica de Lisboa (IST) and…

  11. Immunregulation bei aggressiver Parodontitis im Vergleich mit moderater chronischer Parodontitis und gesundem Parodontium

    OpenAIRE

    Schmidt, Jana

    2013-01-01

    Es ist davon auszugehen, dass Fehlfunktionen im Immunsystem mit der Ausprä-gung des Krankheitsbildes der aggressiven Parodontitis im Zusammenhang ste-hen. In dieser Arbeit sollen anhand klinischer, immunologischer und mikrobiologischer Untersuchungen ein immunologisches Risikoprofil bei Patienten mit aggressiver Parodontitis erschlossen, gegebenenfalls Unterschiede zur moderaten chronischen Parodontitis beleuchtet und explorativ Zusammenhänge zwischen immunologischen und mikrobiologischen Bef...

  12. Experience with water-cooled grates in waste incinerators; Erfahrungen mit dem wassergekuehlten Rost in der thermischen Abfallverwertung

    Energy Technology Data Exchange (ETDEWEB)

    Drexler, J.; Krueger, J. [Muellkraftwerk Schwandorf Betriebsgesellschaft mbH (Germany)

    1999-07-01

    The 17th Federal Nuisance Control Ordinance and the Act on Recycling and Waste Management have resulted in major changes in incinerator design and operation. The specified combustion conditions and emission quality specifications required a significant reduction of the air rating in order to raise the combustion temperature and reduce the investment cost of the projected new system. The more rigid burnout specifications made it necessary to increase the secondary air volume and reduce the primary air volume for grate cooling. The Schwandorf incinerator reported shorter grate bar lives even before the above legal regulations came into force as a result of increasing calorific values. Since 1994, experiments were made with water-cooled grates. The investigations aimed at unhurried development of a complete grate cooling system, from cooling of grate bars to heat removal, and were carried out in cooperation with component suppliers. Apart from the wear measurements, data on thermal layout were to determined as well. Three water-cooled grates from different suppliers have been tested since then. [German] Die mit der 17. Bundes-Immissionsschutz-Verordnung (BImSchV) verbundenen Vorschriften haben in Verbindung mit dem Kreislaufwirtschaftsgesetz zu einschneidenden Massnahmen beim Betrieb von Muellverbrennungsanlagen gefuehrt. Durch die in paragraph 4 der 17 BImSchV festgelegten Verbrennungsbedingungen und die strengen gesetzlichen Auflagen in der Abgasreinigung wurde eine deutliche Reduzierung der Luftzahl notwendig. Hierdurch sollte die Verbrennungstemperatur gesteigert und die Investitionskosten bei der neu zu errichtenden Rauchgasreinigungsanlage gesenkt werden. Weiterhin wurde durch die strengeren Grenzwerte hinsichtlich des Ausbrandes der Rauchgase eine Steigerung der Sekundaerluftmenge notwendig. Die zur Kuehlung des Rostes eingesetzte Primaerluft musste aus den beiden genannten Gruenden deutlich reduziert werden. Bereits vor Eintreten der Wirksamkeit der oben

  13. A methodology of the assessment of environmental and human health risks from amine emissions from post combustion CO2 capture technology

    Science.gov (United States)

    Korre, Anna; Manzoor, Saba; Simperler, Alexandra

    2015-04-01

    Post combustion CO2 capture (PCCC) technology in power plants using amines as solvent for CO2 capture, is one of the reduction technologies employed to combat escalating levels of CO2 in the atmosphere. However, amine solvents used for capturing CO2 produce negative emissions such as, nitrosamines and nitramines, which are suspected to be potent carcinogens. It is therefore essential to assess the atmospheric fate of these amine emissions in the atmosphere by studying their atmospheric chemistry, dispersion and transport pathways away from the source and deposition in the environment, so as to be able to assess accurately the risk posed to human health and the natural environment. An important knowledge gap until recently has been the consideration of the atmospheric chemistry of these amine emissions simultaneously with dispersion and deposition studies so as to perform reliable human health and environmental risk assessments. The authors have developed a methodology to assess the distribution of such emissions away from a post-combustion facility by studying the atmospheric chemistry of monoethanolamine, the most commonly used solvent for CO2 capture, and those of the resulting degradation amines, methylamine and dimethylamine. This was coupled with dispersion modeling calculations (Manzoor, et al., 2014; Manzoor et al,2015). Rate coefficients describing the entire atmospheric chemistry schemes of the amines studied were evaluated employing quantum chemical theoretical and kinetic modeling calculations. These coefficients were used to solve the advection-dispersion-chemical equation using an atmospheric dispersion model, ADMS 5. This methodology is applicable to any size of a power plant and at any geographical location. In this paper, the humman health risk assessment is integrated in the modelling study. The methodology is demonstrated on a case study on the UK's largest capture pilot plant, Ferrybridge CCPilot 100+, to estimate the dispersion, chemical

  14. Silicon solar cells with high efficiencies. Final report; Silicium-Solarzellen mit hoechsten Wirkungsgraden. Abschlussbericht

    Energy Technology Data Exchange (ETDEWEB)

    Wettling, W.; Knobloch, J.; Glunz, S.W.; Henninger, V.; Kamerewerd, F.J.; Koester, B.; Leimenstoll, A.; Schaeffer, E.; Schumacher, J.; Sterk, S.; Warta, W.

    1996-06-01

    In this report the basic activities for the development of the silicon high efficiency solar cell technology are described. The project had two main goals: (i) The improvement of efficiencies using a systematic optimization of all cell parameters and technology steps and (ii) the simplification of the technology towards the possibilities of an industrial production, keeping the cell efficiency at a high level. Starting from the LBSF technology, developed at Fraunhofer ISE, the reduction of all loss mechanisms led to efficiencies up to 22.5% on FZ-silicon. Using a modification of this technology efficiencies of up to 21.7% have been reached on Cz-silicon. Even after the reduction of the number of photolithographic steps from six to three efficiencies up to 21.6% on FZ- and 19.5% on Cz-silicon have been obtained. These are best values in an international comparison. (orig.) [Deutsch] In diesem Projektbericht werden grundlegende Arbeiten zur Entwicklung der Silicium-`Highefficiency`-Solarzellentechnologie beschrieben. Das Projekt hatte zwei Hauptziele: (i) Die Erhoehung der Wirkungsgrade durch eine systematische Optimierung aller Zellparameter und aller Technologieschritte und (ii) die Vereinfachung der Technologie unter Beibehaltung sehr hoher Wirkungsgrade mit dem Ziel einer Annaeherung an die Moeglichkeiten der Industriefertigung. Ausgehend von der im Fraunhofer ISE entwickelten LBSF-Technologie gelang es durch Reduzierung aller Verlustmechanismen, Wirkungsgrade bis zu 22.5% auf FZ-Silicium zu erreichen. Nach Anpassung der Technologie wurden auf Cz-Silicium Wirkungsgrade bis 21.7% erzielt. Ein von sechs auf drei Fotomaskenschritte reduzierter Prozess erzielte immerhin noch Werte bis 21.6% auf FZ- und 19.5% auf Cz-Material. Alle dieser Werte stellen im internationalen Vergleich Spitzenleistungen dar. (orig.)

  15. 日本柴油机排放技术的进展(英文)%Diesel Emission Technology Development in Japan

    Institute of Scientific and Technical Information of China (English)

    渡部陽[日本; 南利貴

    2013-01-01

    The pioneering research works on the high pressure fuel injection and the pilot injection technologies are introduced to overview the pathway of the engine emission technology development in Japan. In the ifrst decade of the 21 century, the diesel engine technology realized an ideal combustion as an internal combustion engine, like exhaust gas regeneration (EGR) lean burn combustion. Another breakthrough was made in new after treatment systems. The real world problems of the after treatment are discussed in pursuance of further improvement. Since the diesel passenger car market is smal in Japan, the diesel engine technology development has mostly been driven by commercial vehicle engine technologies. However, driving conditions of commercial vehicles (trucks and buses) and the sulphur content in fuel are different in different countries. These factors signiifcantly affect diesel emission control strategies and design.%该文介绍了日本在高压燃料喷射和导向喷射技术的领先研究工作,回顾日本的柴油机排放技术进展之路。柴油发动机技术方面,在本世纪初的十年内,已经实现了某种内燃机的典型燃烧,例如某种废气回收(EGR)稀薄燃烧引擎系统。新的后处理系统获得了类似的突破。讨论了后处理进一步改进的实际问题。由于日本的柴油乘用车市场不大,因此,柴油机技术在日本的进展一直受到商用机动车引擎需求的驱动。各国商业车辆(客车和卡车)驾驶条件及燃料含硫量的差别,将会明显地影响柴油机排放控制策略和柴油机设计。

  16. Air quality impacts and health-benefit valuation of a low-emission technology for rail yard locomotives in Atlanta Georgia.

    Science.gov (United States)

    Galvis, Boris; Bergin, Michael; Boylan, James; Huang, Yan; Bergin, Michelle; Russell, Armistead G

    2015-11-15

    One of the largest rail yard facilities in the Southeastern US, the Inman and Tilford yards, is located in the northwestern section of Atlanta, Georgia alongside other industries, schools, businesses, and dwellings. It is a significant source of fine particulate (PM2.5) and black carbon (BC) (Galvis, Bergin, & Russell, 2013). We calculate 2011 PM2.5 and BC emissions from the rail yards and primary industrial and on-road mobile sources in the area and determine their impact on local air quality using Gaussian dispersion modeling. We determine the change in PM2.5 and BC concentrations that could be accomplished by upgrading traditional switcher locomotives used in these rail yards to a lower emitting technology and evaluate the health benefits for comparison with upgrade costs. Emissions from the rail yards were estimated using reported fuel consumption data (GAEPD, 2012b) and emission factors previously measured in the rail yards (Galvis et al., 2013). Model evaluation against 2011 monitoring data found agreement between measured and simulated concentrations. Model outputs indicate that the line-haul and switcher activities are responsible for increments in annual average concentrations of approximately 0.5±0.03 μg/m(3) (39%) and 0.7±0.04 μg/m(3) (56%) of BC, and for 1.0±0.1 μg/m(3) (7%) and 1.6±0.2 μg/m(3) (14%) of PM2.5 at two monitoring sites located north and south of the rail yards respectively. Upgrading the switcher locomotives at the yards with a lower emitting technology in this case "mother slug" units could decrease PM2.5 and BC emissions by about 9 and 3 t/year respectively. This will lower annual average PM2.5 concentrations between 0.3±0.1 μg/m(3) and 0.6±0.1 μg/m(3) and BC concentrations between 0.1±0.02 μg/m(3) and 0.2±0.03 μg/m(3) at monitoring sites north and south of the rail yards respectively, and would facilitate PM2.5 NAAQS attainment in the area. We estimate that health benefits of approximately 20 million dollars per year

  17. Child Care is Everybody's Baby: A Comprehensive Report of Child Care Services, Past, Present, and Future at M.I.T. Final Child Care Proposals as Accepted by M.I.T.

    Science.gov (United States)

    Swartz, Marilyn S.

    The report on child care services at M.I.T. explores the following areas: (1) Planning Issues: Why Should M.I.T. Be Involved in Child Care?--educational concerns, services, benefits and costs, priorities, resource allocation; (2) Background for Planning; Current Institute Child Care Programs--a concise history, M.I.T. summer day camp, the…

  18. Technology

    Directory of Open Access Journals (Sweden)

    Xu Jing

    2016-01-01

    Full Text Available The traditional answer card reading method using OMR (Optical Mark Reader, most commonly, OMR special card special use, less versatile, high cost, aiming at the existing problems proposed a method based on pattern recognition of the answer card identification method. Using the method based on Line Segment Detector to detect the tilt of the image, the existence of tilt image rotation correction, and eventually achieve positioning and detection of answers to the answer sheet .Pattern recognition technology for automatic reading, high accuracy, detect faster

  19. The Technology of Non-thermal Plasma Assisted NH3-SCR Reduce Marine Diesel Emission and Aldehydes Byproducts Formation

    Directory of Open Access Journals (Sweden)

    Lei Jiang

    2013-12-01

    Full Text Available This study describes briefly various after-treatment technologies in marine diesel engines and application difficulties of DPF and SCR are included. An experiment has been conducted using non-thermal plasma generated by Dielectric Barrier Discharge (DBD process assisted NH3-SCR catalyst to reduce the nitrogen oxides (NOx from diesel engine exhaust. The formation mechanism of byproducts-type such as HCHO and CH3CHO in the non-thermal plasma assisted NH3-SCR hybrid system.

  20. Research on Emissions, Air quality, Climate, and Cooking Technologies in Northern Ghana (REACCTING): study rationale and protocol

    OpenAIRE

    Dickinson, Katherine L.; Kanyomse, Ernest; Piedrahita, Ricardo; Coffey, Evan; Rivera, Isaac J; Adoctor, James; Alirigia, Rex; Muvandimwe, Didier; Dove, MacKenzie; Dukic, Vanja; Mary H Hayden; Diaz-Sanchez, David; Abisiba, Adoctor Victor; Anaseba, Dominic; Hagar, Yolanda

    2015-01-01

    Background Cooking over open fires using solid fuels is both common practice throughout much of the world and widely recognized to contribute to human health, environmental, and social problems. The public health burden of household air pollution includes an estimated four million premature deaths each year. To be effective and generate useful insight into potential solutions, cookstove intervention studies must select cooking technologies that are appropriate for local socioeconomic conditio...

  1. Advances in physical study of high enthalpy plasma jets of technological interest: emission spectra and plasma characteristics

    Science.gov (United States)

    Belevtsev, A. A.; Chinnov, V. F.; Isakaev, E. Kh.; Markin, A. V.; Tazikova, T. F.; Tereshkin, S. A.

    1998-10-01

    Offers a comprehensive study of the emission spectra and plasma characteristics of high enthalpy atmospheric pressure argon and nitrogen jets produced by a high- current industrially important arc plasmatron with a vortex stabilized channel-anode (I4g/s, jet diameter at a minimum-6mm). The spectra are taken at different distances from the cathode in the 200-950nm region with a spectral resolution=3D0.01nm allowing a fine structure of vibronic bands to be essentially resolved except that due to the dublet (spin) splitting and Λ-doubling. Also derived (through the Abel inversion) are radial distributions of plasma components. The spectra obtained have been used for determining plasma composition, the electron component parameters (by atomic/ionic Stark half-widths and intensities) and the assessment of rotational and vibrational temperatures by simulating molecular bands.

  2. Pathophysiologie des Kollagenstoffwechsels bei Patienten mit Induratio penis plastica (IPP

    Directory of Open Access Journals (Sweden)

    Lahme S

    2000-01-01

    Full Text Available Die Pathogenese der IPP ist bis heute nicht geklärt. Histopathologische Untersuchungen zeigen, daß der Kollagenstoffwechsel eine Rolle spielt. Dies veranlaßte uns zur genauen Analyse der Kollagenstoffwechselparameter bei IPP. Bei 11 Patienten mit IPP und 11 Kontrollpersonen wurden Kollagenstoffwechselparameter (Prokollagen III [PIIIP], PMN-Elastase [PMN-E], Fibronektin [FN], Fibronektinrezeptor [FN-R] und alpha1-Proteinase-Inhibitor [alpha1-PI] im cavernösen und peripheren Blut bestimmt. PMN-E, PIIIP, FN und FN-R waren in den beiden Untersuchungsgruppen nicht unterschiedlich. Die peripher venösen unterschieden sich nicht von den cavernösen Blutproben. Sowohl im peripher venös (158,55 mg/dl als auch im cavernös entnommenen Blut (168,29 mg/dl war die Konzentration des a1-PI signifikant niedriger als in der Kontrollgruppe (214,82 mg/dl. An einem zweiten Kollektiv von 23 Patienten wurden Analysen des Phänotyps für alpha1-PI im Hinblick auf das Vorliegen von genetisch determinierten Mangelallelen vorgenommen. Hier zeigte sich kein signifikanter Unterschied zu einem Kontrollkollektiv von 19 gesunden Probanden. Die alpha1-PI Erniedrigung der IPP-Patienten ist signifikant und liegt unterhalb des Normalwertbereichs für die gesunde Population. Ein Mangel an alpha1-PI kann zur Aktivitätserhöhung der Proteasen und zum Umbau des Kollagengewebes führen. Möglicherweise kommt es zusammen mit einem lokal wirksamen Einflußfaktor schließlich zur dystrophen Kalzifikation. Die humangenetischen Untersuchungen sprechen nicht für eine genetische Determinierung des alpha1-PI-Mangels, sondern legen eine erworbene hepatische Störung nahe.

  3. MiT family translocation renal cell carcinoma.

    Science.gov (United States)

    Argani, Pedram

    2015-03-01

    The MiT subfamily of transcription factors includes TFE3, TFEB, TFC, and MiTF. Gene fusions involving two of these transcription factors have been identified in renal cell carcinoma (RCC). The Xp11 translocation RCCs were first officially recognized in the 2004 WHO renal tumor classification, and harbor gene fusions involving TFE3. The t(6;11) RCCs harbor a specific Alpha-TFEB gene fusion and were first officially recognized in the 2013 International Society of Urologic Pathology (ISUP) Vancouver classification of renal neoplasia. These two subtypes of translocation RCC have many similarities. Both were initially described in and disproportionately involve young patients, though adult translocation RCC may overall outnumber pediatric cases. Both often have unusual and distinctive morphologies; the Xp11 translocation RCCs frequently have clear cells with papillary architecture and abundant psammomatous bodies, while the t(6;11) RCCs frequently have a biphasic appearance with both large and small epithelioid cells and nodules of basement membrane material. However, the morphology of these two neoplasms can overlap, with one mimicking the other. Both of these RCCs underexpress epithelial immunohistochemical markers like cytokeratin and epithelial membrane antigen (EMA) relative to most other RCCs. Unlike other RCCs, both frequently express the cysteine protease cathepsin k and often express melanocytic markers like HMB45 and Melan A. Finally, TFE3 and TFEB have overlapping functional activity as these two transcription factors frequently heterodimerize and bind to the same targets. Therefore, on the basis of clinical, morphologic, immunohistochemical, and genetic similarities, the 2013 ISUP Vancouver classification of renal neoplasia grouped these two neoplasms together under the heading of "MiT family translocation RCC." This review summarizes our current knowledge of these recently described RCCs. Copyright © 2015 Elsevier Inc. All rights reserved.

  4. Plattenepithelkarzinom in Verbindung mit einer roten Tätowierung.

    Science.gov (United States)

    Schmitz, Inge; Prymak, Oleg; Epple, Matthias; Ernert, Carsten; Tannapfel, Andrea

    2016-06-01

    Obwohl Tätowierungen in den letzten Jahren außerordentlich beliebt geworden sind, wurde in der Literatur bisher nur über wenige Fälle schwerer Reaktionen berichtet, die zu einer malignen Transformation führten. Dies steht im Kontrast zu der praktisch unüberschaubaren Zahl an Tätowierungen weltweit. Die Zusammensetzung der für Tätowierungen verwendeten Farbstoffe variiert stark, und selbst gleiche Farbtöne können unterschiedliche Komponenten enthalten. Das Ziel unserer Studie war es zu untersuchen, auf welche Weise Tätowierungen möglicherweise Hautkrebs auslösen können. Wir berichten über den seltenen Fall einer 24-jährigen Frau, bei der sich sieben Monate nachdem sie eine Tätowierung auf dem Fußrücken erhalten hatte in unmittelbarer Nähe des verwendeten roten Farbstoffs ein Plattenepithelkarzinom entwickelte. Die Komplikationen begannen mit einer unspezifischen Schwellung. Die Läsion wurde histologisch untersucht. Die Zusammensetzung des inkorporierten Farbstoffs wurde mittels Rasterelektronenmikroskopie in Kombination mit energiedispersiver Elementanalyse analysiert. Zur weiteren Charakterisierung wurden Thermogravimetrie und Pulverdiffraktometrie eingesetzt. Der Tätowierungsfarbstoff enthielt hauptsächlich Bariumsulfat; Spuren von Al, S, Ti, P, Mg und Cl ließen sich ebenfalls nachweisen. Bei der Analyse zeigten sich Pigmentgranula unterschiedlicher Größe. In seltenen Fällen kann Tätowierungstinte karzinogene Effekte haben, die multifaktoriell zu sein scheinen. © 2016 Deutsche Dermatologische Gesellschaft (DDG). Published by John Wiley & Sons Ltd.

  5. Patient mit Ostiumstenose-Hauptstamm und Bifurkationsstenose - R. interventricularis anterior / R. diagonalis

    Directory of Open Access Journals (Sweden)

    Kerschner K

    2005-01-01

    Full Text Available Die Indikation zu Eingriffen am Hauptstamm und komplexen Bifurkationsstenosen wird auch nach Einführung von Drug-eluting- Stents und neuen Techniken kontrovers diskutiert. Im folgenden wird über eine kombinierte Hauptstamm- und Bifurkationsintervention berichtet. Anamnese: Ein 66jähriger Patient mit seit zwei Monaten zunehmender Belastungsdyspnoe Stadium III (NYHA, verbunden mit thorakalem Oppressionsgefühl. Zustand nach zerebralem Insult mit geringen Residuen, permanentes Vorhofflimmern, unzureichend eingestellte Hypertonie, geringe Nierenfunktionseinschränkung, Hypercholesterinämie. Invasive Abklärung: Ventrikulographie: ausgedehnte Akinese diaphragmal, Hypokinesie des Restventrikels, Auswurffraktion 29 %. Angiographie: 50 % Ostiumstenose-Hauptstamm, Bifurkationsstenose R. interventricularis anterior (LAD mit dem großen 1. diagonalen Ast jeweils 90 % (echte Bifurkation Typ IV ICPS-Klassifikation, Y konfiguriert (Abb. 1. Geringe Sklerose der klein angelegten A. circumflexa, proximaler Verschluß rechte Koronararterie mit Kollateralen von links zur diffus sklerotischen Peripherie. Nach entsprechender Aufklärung über die Therapiemöglichkeiten wurde eine Bypass-Operation vom Patienten nicht gewünscht und die Intervention durchgeführt. Intervention: Führungskatheter EBU 4 7F (Launcher, Medtronic. Sondierung beider Äste mit einem BMW-Führungsdraht (Balance Middleweight, Guidant Corp. und sequentielle Vordehnung R. diagonalis und LAD mit einem 2,5 / 20 mm-Ballon (Hypro Pegaso Sorin, Biomedica mit 16 atm. Plazierung eines 2,75 / 24 mm-Taxus-Express-2-Stent (Boston Scientific im R. diagonalis und eines 3,0 / 28 mm-Taxus-Express-2-Stent im LAD und Implantation in Crush-Technik (Abb. 2, jeweils 14 atm, mit dem Stent im R. diagonalis als gecrushtem Stent. Resondierung des R. diagonalis und Vordehnung des Abganges mit einem 1,5 und 2,5 mm-Ballon mit 20 atm und anschließende Kissing-Ballondilatation R. diagonalis 2,5 mm und LAD 3,0 mm

  6. Development of reducing CO_2 emission technologies of blast furnace ironmaking%降低高炉炼铁碳排放技术的发展

    Institute of Scientific and Technical Information of China (English)

    曾先喜; 郭豪

    2011-01-01

    Based on blast furnace operating conditions,the reducting agent consumption for an "ideal" blast furnace was calculated by Rist Operating Line model.Considering the calculation results and the potential of reducing CO2 emission in China,it is proposed that decreasing blast furnace fuel ratio is the main measure to reduce CO2 emission.In integrated iron and steel enterprises,there are many ways to reduce the fuel consumption of blast furnace,however,the energy balance of the whole enterprise should be considered.In this sense,some new technologies,such as Oxygen BF,top gas circulation,plastic injection and using prereduction burden,etc.may be adopted to reduce the CO2 emission of blast furnace ironmaking with high efficiency and good environment.%以生产高炉为基础,通过Rist操作线模型计算了"理想"高炉的还原剂消耗。针对"理想"高炉的计算和我国目前高炉碳排放潜能的分析,提出了在我国现有条件下,降低高炉燃料比是减排高炉碳排放的主要措施,然而考虑到整个钢铁厂的能量平衡,应该选择最佳的方法减少CO2排放量。氧气高炉、炉顶煤气循环、高炉喷吹废旧塑料以及使用预还原炉料都可以依靠流程的系统优化不同程度地减少CO2排放量,并保持系统的高效环保。

  7. Volatile organic compounds emission control in industrial pollution source using plasma technology coupled with F-TiO2/γ-Al2O3.

    Science.gov (United States)

    Zhu, Tao; Chen, Rui; Xia, Ni; Li, Xiaoyang; He, Xianxian; Zhao, Wenjuan; Carr, Tim

    2015-01-01

    Volatile organic compounds' (VOCs) effluents, which come from many industries, are triggering serious environmental problems. As an emerging technology, non-thermal plasma (NTP) technology is a potential technology for VOCs emission control. NTP coupled with F-TiO2/γ-Al2O3 is used for toluene removal from a gaseous influent at normal temperature and atmospheric pressure. NTP is generated by dielectric barrier discharge, and F-TiO2/γ-Al2O3 can be prepared by sol-gel method in the laboratory. In the experiment, the different packed materials were packed into the plasma reactor, including γ-Al2O3, TiO2/γ-Al2O3 and F-TiO2/γ-Al2O3. Through a series of characterization methods such as X-ray diffraction, scanning electronic microscopy and Brunner-Emmet-Teller measurements, the results show that the particle size distribution of F-TiO2 is relatively smaller than that of TiO2, and the pore distribution of F-TiO2 is more uniformly distributed than that of TiO2. The relationships among toluene removal efficiency, reactor input energy density, and the equivalent capacitances of air gap and dielectric barrier layer were investigated. The results show that the synergistic technology NTP with F-TiO2/γ-Al2O3 resulted in greater enhancement of toluene removal efficiency and energy efficiency. Especially, when packing with F-TiO2/γ-Al2O3 in NTP reactor, toluene removal efficiency reaches 99% and higher. Based on the data analysis of Fourier Transform Infrared Spectroscopy, the experimental results showed that NTP reactor packed with F-TiO2/γ-Al2O3 resulted in a better inhibition for by-products formation effectively in the gas exhaust.

  8. Towards Ideal NOx and CO2 Emission Control Technology for Bio-Oils Combustion Energy System Using a Plasma-Chemical Hybrid Process

    Science.gov (United States)

    Okubo, M.; Fujishima, H.; Yamato, Y.; Kuroki, T.; Tanaka, A.; Otsuka, K.

    2013-03-01

    A pilot-scale low-emission boiler system consisting of a bio-fuel boiler and plasma-chemical hybrid NOx removal system is investigated. This system can achieve carbon neutrality because the bio-fuel boiler uses waste vegetable oil as one of the fuels. The plasma-chemical hybrid NOx removal system has two processes: NO oxidation by ozone produced from plasma ozonizers and NO2 removal using a Na2SO3 chemical scrubber. Test demonstrations of the system are carried out for mixed oils (mixture of A-heavy oil and waste vegetable oil). Stable combustion is achieved for the mixed oil (20 - 50% waste vegetable oil). Properties of flue gas—e.g., O2, CO2 and NOx—when firing mixed oils are nearly the same as those when firing heavy oil for an average flue gas flow rate of 1000 Nm3/h. NOx concentrations at the boiler outlet are 90 - 95 ppm. Furthermore, during a 300-min continuous operation when firing 20% mixed oil, NOx removal efficiency of more than 90% (less than 10 ppm NOx emission) is confirmed. In addition, the CO2 reduction when heavy oil is replaced with waste vegetable oil is estimated. The system comparison is described between the plasma-chemical hybrid NOx removal and the conventional technology.

  9. Review on greenhouse gases emission and the reduction technology in rice fields%稻田温室气体排放与减排研究综述

    Institute of Scientific and Technical Information of China (English)

    邵美红; 孙加焱; 阮关海

    2011-01-01

    水稻是我国最重要的粮食作物之一,甲烷和氧化亚氮作为稻田两大温室气体,在全球温室效应中起着很大作用.文章综述了水分管理条件、施肥方式、品种选择差异、农作模式差异及土壤气候条件等因素对稻田甲烷和氧化亚氮排放的主要因素,并从综合温室效应方面提出品种和栽培措施、合理施肥和用药、改进农作制度、发展农村沼气能等技术措施,为发展稻田低碳提供一定的参考.%Rice is one of the most important food crops in our country. Two major greenhouse gases, methane ( CH4 ) and nitrous oxide ( N2O) , play significant roles in global greenhouse effect. This paper reviewed the effects of irrigation, fertilization, rice varieties, cropping patterns, soil-climatic conditions and other factors on emissions of CH4 and N2O from rice fields. Considering the synthetic greenhouse effect, some measures of reducing greenhouse gas emission in rice fields were also put forward such as varieties and cultivation, fertilization and pesticide application, improving farming system, development of biogas energy technologies, etc. This paper might provide some references for developing low carbon technology in rice field.

  10. Inseltransplantation als Therapieoption bei Diabetes mellitus Typ 1: Für wen, mit welchem Ziel, mit welchem Erfolg?

    Directory of Open Access Journals (Sweden)

    Ludwig B

    2014-01-01

    Full Text Available Die Inseltransplantation hat sich als Behandlungsoption für Patienten mit Diabetes mellitus Typ 1 etabliert. In den meisten Zentren wird die Indikation gestellt, wenn konventionelle Therapiemethoden versagen und Patienten durch eine hochlabile Stoffwechsellage und rezidivierende Hypoglykämien gefährdet sind. Hintergrund für diese strikte Indikationsstellung ist die Notwendigkeit einer dauerhaften Immunsuppression und der kritische Mangel an verfügbaren Spenderorganen. Durch die Wiederherstellung einer endogenen Insulinsekretion kommt es zu einer zuverlässigen Stabilisierung des Blutzuckerprofils, Vermeidung von Hypoglykämien und Verhinderung bzw. Stabilisierung von Spätkomplikationen. Damit einher geht eine deutliche Verbesserung der Lebensqualität. Das Erreichen einer kompletten Insulinunabhängigkeit ist dabei nicht vorrangiges Therapieziel.

  11. Virtual colonoscopy with multi-slice computed tomography; Virtuelle Koloskopie mit der Mehrschichtcomputertomographie. Vorlaeufige Ergebnisse

    Energy Technology Data Exchange (ETDEWEB)

    Rust, G.-F.; Eisele, O.; Reiser, M. [Institut fuer Klinische Radiologie, Klinikum Grosshadern, Muenchen Univ. (Germany); Hoffmann, J.N.; Kopp, R.; Fuerst, H. [Chirurgische Klinik und Poliklinik, Klinikum der Univ. Muenchen (Germany)

    2000-03-01

    Subject: Using multi-slice computed tomography (MSCT) large body areas can scanned with high spatial resolution. In this study, MSCT was employed for virtual colonoscopy in various pathologies of the colon. Results: Nine polyps and four of five colon carcinomas were detected using MSCT virtual colonoscopy. In three patients with ulcerative colitis virtual coloscopy revealed morphological alterations compatible with this disease. In two of four patients with multiple diverticula of the colon the true extent of the disorder could be assessed in virtual colonoscopy. (orig.) [German] Fragestellung: Die Mehrschichtcomputertomographie (MSCT) vermag, grosse Organbereiche mit hoher raeumlicher Aufloesung zu untersuchen. Daher koennen auch fuer die virtuelle Koloskopie eine bisher nicht erreichbare Ortsaufloesung und Detailtreue erwartet werden. Die ersten Ergebnisse mit der MSCT-Koloskopie bei unterschiedlichen pathologischen Veraenderungen des Kolons werden vorgestellt. Ergebnisse: 4 von 5 Kolonkarzinomen konnten mit der virtuellen Koloskopie dargestellt werden. Bei 3 Patienten wurden mit der virtuellen Koloskopie typische Veraenderungen der Colitis ulcerosa dargestellt, wovon ein Patient die konventionelle Koloskopie nicht tolerierte. Bei 9 Patienten mit Kolonpolypen stimmten die virtuelle und konventionelle Koloksopie vollstaendig ueberein. Bei 4 Patienten mit Divertikulose war mit der virtuellen Koloskopie nur in 2 Faellen der Befund vollstaendig zu sichern. (orig.)

  12. Rekonstruktion mit Netz beim komplexen Prolaps der Frau: Was hilft es der Patientin wirklich?

    Directory of Open Access Journals (Sweden)

    Hierl J

    2010-01-01

    Full Text Available Einleitung: Der komplexe Genitaldeszensus der Frau geht oftmals mit einer deutlichen Einschränkung der Lebensqualität (LQ einher. Dennoch ist der Endpunkt der meisten klinischen Analysen rein anatomischer und funktioneller Natur. In der vorliegenden Untersuchung wurden die Einflüsse der operativen Rekonstruktion mit einem Netz prospektiv auf die LQ evaluiert. Patienten und Methoden: Bei insgesamt 111 Patientinnen mit Deszensus erfolgte zwischen 08/2005 und 12/2007 eine operative Versorgung mittels vaginaler Netzeinlage (anteriorer bzw. kompletter Mesh-Repair. Die LQ wurde prospektiv prä- und postoperativ anhand standardisierter LQ-Fragebögen erfasst. Ergebnisse: Präoperativ zeigte sich bei den Patientinnen eine signifikant reduzierte LQ gegenüber einem Normalkollektiv (p 0,01. Bei 7 % der Patientinnen mit anteriorem, und bei 11 % mit komplettem Mesh-Repair lag postoperativ kein adäquates klinisches Ergebnis vor. In diesem Kollektiv zeigte sich kein signifikanter Unterschied in den LQ-Tests prä- und postoperativ. Bei gutem postoperativem Ergebnis zeigte sich in der Gruppe mit anteriorer Netzeinlage lediglich bei 45 % (p = 0,021, bei kompletter Netzeinlage nur bei 31 % (p = 0,041 eine signifikant verbesserte LQ. Bei kleiner Fallzahl und kurzem Nachbeobachtungszeitraum kann eine gültige Aussage bezüglich der LQ nach Deszensuschirurgie mit Netzeinlage jedoch noch nicht getroffen werden.

  13. Aktuelles aus der Forschung mit menschlichen embryonalen Stammzellen (Mit dem Jahresbericht 2004 der Zentralen Ethikkommission für Stammzellenforschung

    Directory of Open Access Journals (Sweden)

    Beier HM

    2005-01-01

    Full Text Available Im internationalen Diskurs über die Forschung mit menschlichen embryonalen Stammzellen und die Perspektiven, regenerative Therapien zu entwickeln, fanden sich in jüngster Zeit bemerkenswerte Beiträge, auf die wir hier zurückgreifen. In den aufstrebenden Forschungsnationen Südkorea, Taiwan, Singapur und China läuft ein enormer Wettbewerb um die umfangreichsten Forschungsressourcen und die Führung in der embryonalen Stammzellforschung ab. In Europa und in den USA investieren Wissenschaftler Zeit, Forschungsmittel und intellektuelle Kapazität in die Suche nach Wegen, humane embryonale Stammzellen herzustellen, ohne menschliche Eizellen und Embryonen für diese Verfahren opfern zu müssen. In Deutschland finden solche Bemühungen ein positives Echo, weil das Gesetz es verbietet, embryonale Stammzellen aus verwaisten Blastozysten, sog. überzähligen Embryonen, herzustellen. Dem Stammzellgesetz gemäß kann in Deutschland nur unter Ausnahmebedingungen an menschlichen embryonalen Stammzellen geforscht werden. Wissenschaftler dürfen nach Prüfung und Genehmigung eines speziellen Projektantrages durch das Robert-Koch-Institut menschliche embryonale Stammzell-Linien von bestimmten, lizensierten, ausländischen Herstellern importieren. Allerdings müssen diese Zell-Linien vor dem Stichtag, dem 1.1.2002, hergestellt worden sein. Die Zentrale Ethik-Kommission für Stammzellenforschung (ZES, die das Robert-Koch-Institut im Auftrag der Bundesregierung berät, berichtet jedes Jahr über ihre Arbeit. Im zweiten Teil dieses Artikels wird mit freundlicher Genehmigung des Bundesministeriums für Gesundheit und Soziale Sicherheit der ZES-Jahresbericht 2004 veröffentlicht.

  14. Gebrauch von Komplementärmedizin bei Patienten mit metastasierendem Melanom unter Therapie mit Ipilimumab innerhalb einer klinischen Studie.

    Science.gov (United States)

    Huebner, Jutta; Mohr, Peter; Simon, Jan-Christoph; Fluck, Michael; Berking, Carola; Zimmer, Lisa; Loquai, Carmen

    2016-05-01

    In Deutschland wenden 40-90 % aller Krebspatienten Methoden der komplementären and alternativen Medizin (KAM) an. Bis dato gibt es kein Datenmaterial zum Einsatz der KAM bei Melanompatienten. Das Ziel unserer Studie war es, Daten über den Gebrauch, die Informationsquellen und Ziele von Patienten mit metastasierendem Melanom zu erfassen. Einhundertsechsundfünfzig Patienten aus 25 Studienzentren nahmen an der DecOG-MM-PAL Multibasket Studie teil. Die beteiligten Personen wurden auch gebeten, an einer Nebenstudie teilzunehmen, die ihren Gebrauch von KAM erfassen sollte. Dazu wurde während der Behandlung ein standardisierter Fragebogen zu genau festgelegten Zeitpunkten ausgeteilt. Insgesamt gingen 55 Fragebögen von 32 (21 %) Melanompatienten ein. Von diesen gaben 17 (53 %) ein Interesse an KAM an, und sieben (22 %) machten von KAM Gebrauch. Die Hauptinformationsquellen (31 %) waren Familienmitglieder und Freunde, gefolgt von Ärzten (19 %). Die Hauptgründe für die Anwendung von KAM waren die Stärkung des Immunsystems (41 %) und des Körpers (34 %). Nahrungsergänzungsmittel (Vitamine und Spurenelemente) wurden am häufigsten angewendet (28 %). Eine relativ hohe Anzahl an Patienten mit metastasierendem Melanom machte trotz Teilnahme an einer klinischen Studie von KAM Gebrauch. Wechselwirkungen könnten durch biologisch basierte KAM auftreten, und hier besonders bei immunmodulierenden KAM- Strategien. Um Risiken zu vermeiden, sollte die Kommunikation zwischen den Ärzten und den Patienten verbessert werden. © 2016 Deutsche Dermatologische Gesellschaft (DDG). Published by John Wiley & Sons Ltd.

  15. Kombinierte radiologisch-interventionelle und radiotherapeutische Behandlung von Patienten mit zentralen Gallengangsmalignomen

    Directory of Open Access Journals (Sweden)

    Riedmann E

    2005-01-01

    Full Text Available Einleitung: In einer retrospektiven Analyse von 24 Patienten mit inoperablen oder nicht radikal resezierten Karzinomen des Gallentraktes wurde der Einfluß einer HDR-(high-dose-rate192-Ir-Brachytherapie oder der kombinierten Tele-/Brachytherapie auf Überlebenszeit und Verbesserung der Lebensqualität untersucht. Methode und Material: Von 1996 bis 2001 wurden 24 Patienten mit einem Karzinom, welches die extrahepatischen Gallenwege obstruierte (16 Klatskin-Tumoren, 6 Gallenblasenkarzinome, 2 Metastasen eines GI-Tumors, einer palliativen Radiatio unterzogen. 14 von 24 Patienten wurden bei einem lokal fortgeschrittenen inoperablen Tumor, 5 Patienten nach einer R1-Resektion und 5 Patienten im Rezidiv behandelt. Bei allen Patienten wurde eine perkutane transhepatische Cholangiographie (PTC und anschließend die Implantation eines oder mehrerer selbstexpandierbarer Stents zur Behandlung der biliären Okklusion durchgeführt. 23 Patienten erhielten eine endoluminale Brachytherapie, 10 davon kombiniert mit einer Teletherapie; ein Patient erhielt eine alleinige Teletherapie. Im ersten Jahr wurde sechs Patienten die Brachytherapie mit einer Dosis von 15 Gray (Gy in drei Fraktionen verabreicht. Ab 1997 wurden 17 Patienten mit hyperfraktionierter Brachytherapie (2 x täglich mit einer mittleren Dosis von 20 Gy (5 x 4 Gy behandelt. Die mittlere Dosis der Teletherapie in beiden Gruppen betrug 40 Gy (Range 22–60 Gy. Ergebnisse: Das mediane Überleben für alle Patienten betrug 7,7 Monate. Patienten, die mit hyperfraktionierter Brachytherapie behandelt wurden, zeigten einen Trend zu einem verlängerten Überleben mit 11,6 Monaten verglichen mit 5,7 Monaten in der konventionell behandelten Gruppe. Die akuten Nebenwirkungen waren moderat.

  16. Erhöhter oxidativer Streß bei Patienten mit instabiler Angina pectoris

    Directory of Open Access Journals (Sweden)

    Bodlaj G

    1998-01-01

    Full Text Available Die instabile Angina pectoris führt oft zum akuten Myokardinfarkt. Da die Lipid-Peroxidation im Verdacht steht, chronische und akute Ereignisse der Atherosklerose und der koronaren Herzkrankheit zu fördern, untersuchten wir die Lipid-Peroxidations-Parameter und alpha-Toco-pherol-Spiegel bei 100 KHK-Patienten und verglichen sie mit denen einer entprechenden Kontrollgruppe. 50 konsekutive Patienten mit stabiler Angina pectoris (SAP und 50 konsekutive Patienten mit instabiler Angina pectoris (IAP wurden untersucht und mit 100 klinisch gesunden Personen verglichen. Zusätzlich zur herkömmlichen Lipid- und Lipoprotein-Analyse wurden die Lipid-Peroxidations-Produkte als Hydroperoxide und Thiobarbituric acid reactive substances (TBARS gemessen. Die konjugierten Diene wurden nur bei den Patienten bestimmt. Da alpha-Tocopherol eines der wichtigsten Antioxidantien ist, wurde es ebenfalls quantifiziert. Wie erwartet hatten die Patienten wesentlich höhere Cholesterin-, Triglyzerid-, LDL-C- und Lp(a-Spiegel und niedrigere HDL-C-Spiegel als die Kontrollgruppe. Als die Patienten in Gruppen mit stabiler und instabiler Angina pectoris geteilt wurden, waren Peroxide und TBARS in der letzteren Gruppe wesentlich höher als bei den anderen Patienten und der Kontrollgruppe. Auch konjugierte Diene waren eindeutig höher bei den Patienten mit instabiler Angina pectoris. Der alpha-Tocopherol-Gesamtspiegel war in allen 3 Gruppen vergleichbar, aber der alpha-Tocopherol-Gehalt pro LDL-Partikel war bei den Patienten mit IAP am niedrigsten, gefolgt von denen mit SAP und der Kontrollgruppe. Wir schließen daraus, daß die Lipid-Peroxidations-Parameter bei Patienten mit IAP erhöht sind und SAP-Patienten von IAP-Patienten unterscheiden.

  17. A Chinese literature overview on ultra-weak photon emission as promising technology for studying system-based diagnostics.

    Science.gov (United States)

    He, Min; Sun, Mengmeng; van Wijk, Eduard; van Wietmarschen, Herman; van Wijk, Roeland; Wang, Zhihong; Wang, Mei; Hankemeier, Thomas; van der Greef, Jan

    2016-04-01

    To present the possibilities pertaining to linking ultra-weak photon emission (UPE) with Chinese medicine-based diagnostics principles, we conducted a review of Chinese literature regarding UPE with respect to a systems view of diagnostics. Data were summarized from human clinical studies and animal models published from 1979 through 1998. The research fields can be categorized as follows: (1) human physiological states measured using UPE; (2) characteristics of human UPE in relation to various pathological states; and (3) the relationship between diagnosis (e.g., Chinese syndromes) and the dynamics of UPE in animal models. We conclude that UPE has clear potential in terms of understanding the systems view on health and disease as described using Chinese medicine-based diagnostics, particularly from a biochemistry-based regulatory perspective. Linking UPE with metabolomics can further bridge biochemistry-based Western diagnostics with the phenomenology-based Chinese diagnostics, thus opening new avenues for studying systems diagnostics in the early stage of disease, for prevention-based strategies, as well as for systems-based intervention in chronic disease.

  18. 24. MPA-seminar: safety and reliability of plant technology with special emphasis on integrity and life management. Vol. 1. Papers 1-27; 24. MPA-Seminar: Sicherheit und Verfuegbarkeit in der Anlagentechnik mit dem Schwerpunkt Integritaet und Lebensdauermanagement. Bd. 1. Vortraege 1-27

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1999-08-01

    The first volume is dedicated to the safety and reliability of plant technology with special emphasis on the integrity and life management. The main topic in the volume is the contribution of nondestructive testing to the reactor safety from an international point of view. All 20 papers are separately analyzed for this database. (orig.)

  19. 24. MPA-seminar: safety and reliability of plant technology with special emphasis on integrity and life management. Vol. 1. Papers 1-27; 24. MPA-Seminar: Sicherheit und Verfuegbarkeit in der Anlagentechnik mit dem Schwerpunkt Integritaet und Lebensdauermanagement. Bd. 1. Vortraege 1-27

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1999-08-01

    The first volume is dedicated to the safety and reliability of plant technology with special emphasis on the integrity and life management. The main topic in the volume is the contribution of nondestructive testing to the reactor safety from an international point of view. All 20 papers are separately analyzed for this database. (orig.)

  20. 24. MPA-seminar: safety and reliability of plant technology with special emphasis on integrity and life management. Vol. 2. Papers 28-63; 24. MPA-Seminar: Sicherheit und Verfuegbarkeit in der Anlagentechnik mit dem Schwerpunk Integritaet und Lebensdauermanagement. Bd. 2. Vortraege 28-63

    Energy Technology Data Exchange (ETDEWEB)

    1999-09-01

    The second volume is dedicated to the safety and reliability of plant technology with special emphasis on the integrity and life management. The following topics are discussed: 1. Integrity of vessels, pipes and components. 2. Fracture mechanics. 3. Measures for the extension of service life, and 4. Online Monitoring. All 30 contributions are separately analyzed for this database. (orig.)