WorldWideScience

Sample records for modeling system oms

  1. The OMS3 JGrass-NewAge Environmental Modelling System

    Science.gov (United States)

    Formetta, G.; David, O.; Rigon, R.

    2012-12-01

    The need for integrated analysis, and the multiplicity of possible goals in analyses that require hydro-biophysical modelling, necessitates more than ever the capability of composing modelling solutions with parts of known quality, which are transparent to users and consist of reusable model components. Moreover, modern hydrological modelling requires interaction with GIS tools to allow visualizations and the data-processing necessary to synthesise knowledge from high volumes of inputs and outputs data. Last but not least, doing science that is reproducible has requirements that go beyond the computational issues to embrace the possibility to inspection the tools, and easy compare modelling solutions by third party groups. The JGrass-NewAge system was born in order to satisfy these requirements. It is based on the geographic information system uDig-JGrass, and is composed of two parts: (i) the system of visualization of the data and of the results based on uDig; (ii) the modelling components. The latter are implemented as OMS3 components which can be connected or excluded at runtime, according to the needs and works seamlessly inside the uDig Spatial Toolbox. The system is based on a hillslope-link geometrical partition of the landscape, thus the basic unit, where the water budget is evaluated, is the hillslope, and each one of them drains into a single associated link rather than cells or pixels. To this conceptual partition corresponds an implementation of informatics that uses vectorial features for channels, and raster data for hillslopes. The mass budget for each hillslope can be performed in two ways: according to a modification of Duffy dynamical model of hillslope runoff or according to HyMod lumped model. Differently from traditional rainfall-runoff models where the discharge is usually given at the outlet of a catchment, the discharge is evaluated in each link of the river network according to a procedure presented in Cuencas model. The system includes

  2. PV O&M Cost Model and Cost Reduction

    Energy Technology Data Exchange (ETDEWEB)

    Walker, Andy

    2017-03-15

    This is a presentation on PV O&M cost model and cost reduction for the annual Photovoltaic Reliability Workshop (2017), covering estimating PV O&M costs, polynomial expansion, and implementation of Net Present Value (NPV) and reserve account in cost models.

  3. User documentation for the MSK and OMS intelligent tutoring systems

    Science.gov (United States)

    Fink, Pamela K.; Herren, L. Tandy; Lincoln, David T.

    1991-01-01

    This user's guide describes how to use the Intelligent Tutoring Systems for the Manual Select Keyboard (MSK) and the Orbital Maneuvering System (OMS) and how to use the C code that runs the mockup version of the MSK.

  4. Space Shuttle OMS engine valve technology. [Orbital Maneuvering System

    Science.gov (United States)

    Wichmann, H.

    1974-01-01

    Valve technology program to determine shutoff valve concepts suitable for the Orbital Maneuvering System (OMS) engine of the Space Shuttle. The tradeoff studies selected the electric torque motor operated dual poppet and ball valves as the most desirable valve concepts for the OMS Engine Shutoff Valve. A prototype of one of these concepts was built and subjected to a design verification program. A number of unique features were designed to include the required contamination insensitivity, operating fluid compatibility, decontamination capability, minimum maintenance requirement and long service life capability.

  5. O&M Modeling of Offshore Wind Farms - State of the Art and Future Developments

    DEFF Research Database (Denmark)

    Asgarpour, Masoud; Sørensen, John Dalsgaard

    2016-01-01

    In this paper the state of the art in O&M models for O&M cost estimation of offshore wind farms is discussed and then, a case study for O&M cost estimation of an 800 MW reference offshore wind farm is given. Moreover, a framework for an ideal O&M strategy optimizer to achieve the maximum possible O...

  6. Planning of O&M for Offfshore Wind Turbines using Bayesian Graphical Models

    DEFF Research Database (Denmark)

    Nielsen, Jannie Jessen; Sørensen, John Dalsgaard

    2010-01-01

    The costs to operation and maintenance (O&M) for offshore wind turbines are large, and riskbased planning of O&M has the potential of reducing these costs. This paper presents how Bayesian graphical models can be used to establish a probabilistic damage model and include data from imperfect...

  7. Non-Toxic Orbiter Maneuvering System (OMS) and Reaction Control System

    Science.gov (United States)

    Hurlbert, Eric A.; Nicholson, Leonard S. (Technical Monitor)

    1999-01-01

    NASA is pursuing the technology and advanced development of a non-toxic (NT) orbital maneuvering system (OMS) and reaction control system (RCS) for shuttle upgrades, RLV, and reusable first stages. The primary objectives of the shuttle upgrades program are improved safety, improved reliability, reduced operations time and cost, improved performance or capabilities, and commonality with future space exploration needs. Non-Toxic OMS/RCS offers advantages in each of these categories. A non-toxic OMS/RCS eliminates the ground hazards and the flight safety hazards of the toxic and corrosive propellants. The cost savings for ground operations are over $24M per year for 7 flights, and the savings increase with increasing flight rate up to $44M per year. The OMS/RCS serial processing time is reduced from 65 days to 13 days. The payload capability can be increased up to 5100 Ibms. The non-toxic OMS/RCS also provides improved space station reboost capability up to 20 nautical miles over the current toxic system of 14 nautical miles. A NT OMS/RCS represents a clear advancement in the SOA over MMH/NTO. Liquid oxygen and ethanol are clean burning, high-density propellants that provide a high degree of commonality with other spacecraft subsystems including life support, power, and thermal control, and with future human exploration and development of space missions. The simple and reliable pressure-fed design uses sub-cooled liquid oxygen at 250 to 350 psia, which allows a propellant to remain cryogenic for longer periods of time. The key technologies are thermal insulation and conditioning techniques are used to maintain the sub-cooling. Phase I successfully defined the system architecture, designed an integrated OMS/RCS propellant tank, analyzed the feed system, built and tested the 870 lbf RCS thrusters, and tested the 6000 lbf OMS engine. Phase 11 is currently being planned for the development and test of full-scale prototype of the system in 1999 and 2000

  8. $Om$ diagnostic applied to scalar field models and slowing down of cosmic acceleration

    CERN Document Server

    Shahalam, M; Agarwal, Abhineet

    2015-01-01

    We apply the $Om$ diagnostic to models for dark energy based on scalar fields. In case of the power law potentials, we demonstrate the possibility of slowing down the expansion of the Universe around the present epoch for a specific range in the parameter space. For these models, we also examine the issues concerning the age of Universe. We use the $Om$ diagnostic to distinguish the $\\Lambda$CDM model from non minimally coupled scalar field, phantom field and generic quintessence models. Our study shows that the $Om$ has zero, positive and negative curvatures for $\\Lambda$CDM, phantom and quintessence models respectively. We use an integrated data base (SN+Hubble+BAO+CMB) for bservational analysis and demonstrate that $Om$ is a useful diagnostic to apply to observational data.

  9. Om Journalistik

    DEFF Research Database (Denmark)

    Andersen, Michael Bruun

    2007-01-01

    Om forandringer i journalistikkens basisparadigme: Nyheds- eller objektivitetsparadigmet forandringer i 20. århundrede......Om forandringer i journalistikkens basisparadigme: Nyheds- eller objektivitetsparadigmet forandringer i 20. århundrede...

  10. An advanced regulator for the helium pressurization systems of the Space Shuttle OMS and RCS

    Science.gov (United States)

    Wichmann, H.

    1973-01-01

    The Space Shuttle Orbit Maneuvering System and Reaction Control System are pressure-fed rocket propulsion systems utilizing earth storable hypergolic propellants and featuring engines of 6000 lbs and 900 lbs thrust, respectively. The helium pressurization system requirements for these propulsion systems are defined and the current baseline pressurization systems are described. An advanced helium pressure regulator capable of meeting both OMS and RCS helium pressurization system requirements is presented and its operating characteristics and predicted performance characteristics are discussed.

  11. Closeup of STS-26 Discovery, OV-103, orbital maneuvering system (OMS) leak

    Science.gov (United States)

    1988-01-01

    Closeup of STS-26 Discovery, Orbiter Vehicle (OV) 103, orbital maneuvering system (OMS) reaction control system (RCS) nitrogen tetroxide gas leak was captured by a Cobra borescope and displayed on a video monitor. The borescope has a miniature videocamera at the end of a flexible rubber tube and is able to be maneuvered into other inaccessible locations.

  12. O&M Cost Modeling for the Department of Defense

    Science.gov (United States)

    2015-01-01

    IDA Document D-5279 January 2015 O &M Cost Modeling for the Department of Defense Brian G. Gladstone, Project Leader Brandon R. Gould Karen L...Johnson Log: H 14-000973 INSTITUTE FOR DEFENSE ANALYSES 4850 Mark Center Drive Alexandria, Virginia 22311-1882 I N S T I T U T E F O R D E F E N S E A N...Analyses (IDA) under contract DASW01-04-C-0003, Task AO-7-3688, “ O &M Cost Modeling for the Department of Defense,” for the Director, Acquisition

  13. Om forundringsparathed

    DEFF Research Database (Denmark)

    Christensen, Poul Rind

    2009-01-01

    Overfor begrebet forandringsparathed kan man sætte begrebet forundringsparathed. Denne artikel handler om det paradoksale samspil mellem disse to begreber som grundlag for de standende ideer om de videregående uddannelser.......Overfor begrebet forandringsparathed kan man sætte begrebet forundringsparathed. Denne artikel handler om det paradoksale samspil mellem disse to begreber som grundlag for de standende ideer om de videregående uddannelser....

  14. Om Spil

    DEFF Research Database (Denmark)

    Kristiansen, Erik

    2007-01-01

    Introduktion til spil som performances, herunder især computerspil. Om spillets særlige verden og nyere typer af spil, herunder "performative spil", "stedsforankrede spil" og "alternate reality games"....

  15. Metroplex Optimization Model Expansion and Analysis: The Airline Fleet, Route, and Schedule Optimization Model (AFRS-OM)

    Science.gov (United States)

    Sherry, Lance; Ferguson, John; Hoffman, Karla; Donohue, George; Beradino, Frank

    2012-01-01

    This report describes the Airline Fleet, Route, and Schedule Optimization Model (AFRS-OM) that is designed to provide insights into airline decision-making with regards to markets served, schedule of flights on these markets, the type of aircraft assigned to each scheduled flight, load factors, airfares, and airline profits. The main inputs to the model are hedged fuel prices, airport capacity limits, and candidate markets. Embedded in the model are aircraft performance and associated cost factors, and willingness-to-pay (i.e. demand vs. airfare curves). Case studies demonstrate the application of the model for analysis of the effects of increased capacity and changes in operating costs (e.g. fuel prices). Although there are differences between airports (due to differences in the magnitude of travel demand and sensitivity to airfare), the system is more sensitive to changes in fuel prices than capacity. Further, the benefits of modernization in the form of increased capacity could be undermined by increases in hedged fuel prices

  16. Water isotope variations in the global ocean model MPI-OM

    Directory of Open Access Journals (Sweden)

    X. Xu

    2012-02-01

    Full Text Available The stable water isotopes H218O and HDO are incorporated as passive tracers into the oceanic general circulation model MPI-OM, and a control simulation under present-day climate conditions is analyzed in detail. Both δ18O and δD distributions at the ocean surface and deep ocean are generally consistent with available observations on the large scale. The modelled δD-δ18O relations in surface waters slightly deviates from the slope of the global meteoric water line in most basins, and a much steeper slope is detected in Arctic Oceans. The simulated deuterium excess of ocean surface waters shows small variations between 80° S and 55° N, and a strong decrease north of 55° N. The model is also able to capture the quasi-linear relationship between δ18O and salinity S, as well as δD and S, as seen in observational data. Both in the model results and observations, the surface δ–S relations show a steeper slope in extra-tropical regions than in tropical regions, which indicates relatively more addition of isotopically depleted water at high latitudes.

  17. Modeling and simulation of offshore wind farm O&M processes

    Energy Technology Data Exchange (ETDEWEB)

    Joschko, Philip, E-mail: joschko@informatik.uni-hamburg.de [University of Hamburg, Dept. of Informatics, Vogt-Kölln-Straße 30, 22527 Hamburg (Germany); Widok, Andi H., E-mail: a.widok@htw-berlin.de [University of Hamburg, Dept. of Informatics, Vogt-Kölln-Straße 30, 22527 Hamburg (Germany); Appel, Susanne, E-mail: susanne.appel@hs-bremen.de [HSB Bremen, Institute for Environment and Biotechnology, Neustadtswall 30, 28199 Bremen (Germany); Greiner, Saskia, E-mail: saskia.greiner@hs-bremen.de [HSB Bremen, Institute for Environment and Biotechnology, Neustadtswall 30, 28199 Bremen (Germany); Albers, Henning, E-mail: henning.albers@hs-bremen.de [HSB Bremen, Institute for Environment and Biotechnology, Neustadtswall 30, 28199 Bremen (Germany); Page, Bernd, E-mail: page@informatik.uni-hamburg.de [University of Hamburg, Dept. of Informatics, Vogt-Kölln-Straße 30, 22527 Hamburg (Germany)

    2015-04-15

    This paper describes a holistic approach to operation and maintenance (O&M) processes in the domain of offshore wind farm power generation. The acquisition and process visualization is followed by a risk analysis of all relevant processes. Hereafter, a tool was designed, which is able to model the defined processes in a BPMN 2.0 notation, as well as connect and simulate them. Furthermore, the notation was enriched with new elements, representing other relevant factors that were, to date, only displayable with much higher effort. In that regard a variety of more complex situations were integrated, such as for example new process interactions depending on different weather influences, in which case a stochastic weather generator was combined with the business simulation or other wind farm aspects important to the smooth running of the offshore wind farms. In addition, the choices for different methodologies, such as the simulation framework or the business process notation will be presented and elaborated depending on the impact they had on the development of the approach and the software solution. - Highlights: • Analysis of operation and maintenance processes of offshore wind farms • Process modeling with BPMN 2.0 • Domain-specific simulation tool.

  18. OMS event evaluator and scheduler

    Science.gov (United States)

    Eckelkamp, Richard E.

    1990-01-01

    An Operations Management System (OMS) is being designed for Space Station Freedom to improve productivity, reliability, and safety while reducing operations and maintenance costs. Central to the concept is a short term plan containing mixes of man-readable and machine-executable procedures used in an environment of distributed processing and execution. An OMS event evaluator to check upcoming short-term plan events for validity of execution is under development. The first version checks time and resource constraints against operational conditions for current or expected stations. In work are the handling of environmental and other operational constraints, as well as detailed modeling of resources and station operational states. The Ada Program also has the ability to reschedule all or part of the events.

  19. OMS FDIR: Initial prototyping

    Science.gov (United States)

    Taylor, Eric W.; Hanson, Matthew A.

    1990-01-01

    The Space Station Freedom Program (SSFP) Operations Management System (OMS) will automate major management functions which coordinate the operations of onboard systems, elements and payloads. The objectives of OMS are to improve safety, reliability and productivity while reducing maintenance and operations cost. This will be accomplished by using advanced automation techniques to automate much of the activity currently performed by the flight crew and ground personnel. OMS requirements have been organized into five task groups: (1) Planning, Execution and Replanning; (2) Data Gathering, Preprocessing and Storage; (3) Testing and Training; (4) Resource Management; and (5) Caution and Warning and Fault Management for onboard subsystems. The scope of this prototyping effort falls within the Fault Management requirements group. The prototyping will be performed in two phases. Phase 1 is the development of an onboard communications network fault detection, isolation, and reconfiguration (FDIR) system. Phase 2 will incorporate global FDIR for onboard systems. Research into the applicability of expert systems, object-oriented programming, fuzzy sets, neural networks and other advanced techniques will be conducted. The goals and technical approach for this new SSFP research project are discussed here.

  20. M, Membranes, and OM

    CERN Document Server

    García, J A; Vergara, J D; Guijosa, Alberto

    2003-01-01

    We examine the extent to which the action for the membrane of M-theory (the eleven-dimensional construct which underlies and unifies all of the known string theories) simplifies in the so-called Open Membrane (OM) limit, a limit which lies at the root of the various manifestations of noncommutativity in the string context. In order for the discussion to be relatively self-contained, we start out by reviewing why the strings of ten-dimensional string theory are in fact membranes (M2-branes) living in eleven dimensions. After that, we recall the definition of OM theory, as well as the arguments showing that it is part of a larger, eleven-dimensional structure known as Galilean or Wrapped M2-brane (WM2) theory. WM2 theory is a rich theoretical construct which is interesting for several reasons, in particular because it is essentially a toy model of M-theory. We then proceed to deduce a membrane action for OM/WM2 theory, and spell out its implications for the four different types of M2-branes one can consider in ...

  1. OMS engine firing

    Science.gov (United States)

    1983-01-01

    An Orbital maneuvering system (OMS) engine firing caused this bright glow at the aft end of the shuttle Challenger during STS-7. Also visible in the open payload bay are parts of the Shuttle pallet satellite (SPAS-01), the experiment package for NASA's Office of Space and Terrestrial Applications (OSTA-2), the protective cradles for the Indonesian Palapa-B and Telesat Canada Anik C2 satellites, some getaway special (GAS) canisters and the Canadian built remote manipulator system (RMS). The earth's horizon can be seen above the orbiter.

  2. Fra massemedier til mediesystem - om kodediskussionen i systemteoretisk medieforskning Fra massemedier til mediesystem - om kodediskussionen i systemteoretisk medieforskning [From mass media to media system - code discussions in systems theoretical media research

    Directory of Open Access Journals (Sweden)

    Mikkel Fugl Eskjær

    2010-11-01

    Full Text Available Systemteoretisk medieforskning rejser spørgsmålet om, hvorvidt massemedierne udgør en samlet institution, eller om medierne, i kraft af deres indbyrdes forskelle, skal betragtes uafhængigt af hinanden. Ved at indskrive medierne i en generel samfundsteori fremstiller systemteorien medierne som et autonomt funktionssystem. Denne bestræbelse kommer tydeligst til udtryk i identifikationen af en fælles kode for massemediernes system. Med udgangspunkt i Niklas Luhmanns medieteori foretager nærværende artikel en kritisk gennemgang af den systemteoretiske medieforsknings kodediskussion. Første del præsenterer kort systemteoriens kodebegreb og Luhmanns bestemmelse af mediesystemet som organiseret omkring koden information. Den midterste del gennemgår en række alternative forslag til denne kodedefinition, hvilket illustrerer omfanget, men også nogle af begrænsningerne, ved systemteoretisk medieforskning. Sidste del foretager en kritisk diskussion af systemteoriens kodeproblematik og viser, hvordan en ensidig kodefokusering står i vejen for en fortsat udforskning af vilkårene for mediesystemets udvikling og autonomi.Systems theoretical media research raises the question whether the mass media constitute a unified institution, or whether the media, due to their internal differences, should be considered individually and independent of each other. By inscribing the media in a general social theory, systems theory conceptualises the media as an autonomous functional system. This intention is most clearly illustrated by the efforts to identify a shared code for the entire media system. Based on the media theory of Niklas Luhmann, this paper offers a critical presentation of the code discussion within systems theoretical media research. The first part of the paper briefly introduces the systems theoretical notion of a code as well as Luhmann’s definition of the media system as organised and regulated by the code of information. The second part

  3. Om Chr. Petersen

    DEFF Research Database (Denmark)

    Rasborg, Klaus

    1992-01-01

    Om en i dag næsten glemt skikkelse i dansk sociologi, der i sin samtid især blev kendt for sin doktordisputats om den franske sociolog Émile Durkheim......Om en i dag næsten glemt skikkelse i dansk sociologi, der i sin samtid især blev kendt for sin doktordisputats om den franske sociolog Émile Durkheim...

  4. Striden om Tiden

    DEFF Research Database (Denmark)

    Vaaben, Nana Katrine; Bjerg, Helle

    2015-01-01

    Samtidig med skolereformen blev der indført nye arbejdstidsregler på folkeskoleområdet. LDette kapitel handler om de styringsrationaler, der kom til udtryk med Lov nr. 409 og lockouten i 2013 – og om lærernes reaktioner på denne styring af tid og arbejdsopgaver. Ved at bruge begreber om fantasi, ...

  5. On-Orbit Propulsion OMS/RCS

    Science.gov (United States)

    Hurlbert, Eric A.

    2001-01-01

    This slide presentation reviews the Space Shuttle's On-Orbit Propulsion systems: the Orbital Maneuvering System (OMS) and the Reaction Control System (RCS). The functions of each of the systems is described, and the diagrams of the systems are presented. The OMS/RCS thruster is detailed and a trade study comparison of non-toxic propellants is presented.

  6. OMS engine shutoff valve and actuation system design and evaluation. [for space shuttles

    Science.gov (United States)

    Wichmann, H.

    1974-01-01

    Shutoff valve and actuation system concepts that are most suitable for the Orbital Maneuvering Systems engine application were determined. Emphasis was placed on the ten year and 100 mission life requirement, propellant and propellant residue compatibility and weight. It was found that poppet or ball valves utilizing electric or electropneumatic actuation were most applicable. Preliminary design layouts of a number of valve and actuation concepts were prepared and analyzed to make the optimum concept selection. Pneumatic actuation systems were required to feature their own pneumatic supply so that for the quad redundant valve, it was necessary to include two pneumatic supply systems, one for each of the series legs of the quad redundant package. The requirement for the pneumatic package placed heavy reliability, weight, and maintenance penalties upon electropneumatic actuation systems. The two valve and actuation systems concepts selected featured electric torque motor operation and a poppet as well as a ball valve concept with a retractable seal.

  7. Actuation and system design and evaluation OMS engine shutoff valve, Volume 1. [space shuttles

    Science.gov (United States)

    Dunn, V. B.

    1975-01-01

    A technology program was conducted to identify and verify the optimum valve and actuation system concept for the Space Shuttle Orbit Maneuvering System engine. Of major importance to the valve and actuation system selection was the ten-year, 100-mission, 10,000-cycle life requirement, while maintaining high reliability, low leakage, and low weight. Valve and actuation system concepts were comparatively evaluated against past valve failure reports and potential failure modes due to the shuttle mission profile to aid in the selection of the most optimum concept for design, manufacture and verification testing. Two valve concepts were considered during the preliminary design stage; i.e., the moving seat and lifting ball. Two actuation systems were manufactured and tested. Test results demonstrate the viability of a lifting ball concept as well as the applicability of an ac motor actuation system to best meet the requirements of the shuttle mission.

  8. Lidt om billeder

    DEFF Research Database (Denmark)

    Widell, Peter

    2007-01-01

    Artiklen kritiserer to af de mest udbredte billedteorier i dag, nemlig dels Ernst Hans Gombrichs Popper-inspirerede teori om billeder som gisninger, dels Nelson Goodmans teori om billeder som symboler (den semiotiske billedteori). Billeder er hverken gisninger eller symboler, og de refererer ikke...

  9. Samarbejde om indsamling

    DEFF Research Database (Denmark)

    Teglhus, Hanne

    2012-01-01

    Artiklen handler om Steno Museet samarbejde med Svendborg Museum om en indsamling af fysikudstyr fra Skårup Seminarium, som blev nedlagt i 2011. Steno Museet besøgte de nu tomme seminariebygninger på Sydfyn flere gange og hjemtog en del historiske fysikinstrumenter og kemiudstyr....

  10. Begreber om verdensrummet

    DEFF Research Database (Denmark)

    Wahlgreen, Gert

    1991-01-01

    Børns begreber om og forståelse af verdensrummet sættes ind i Piagets og Vygotskys teorier. Hverdagsforestillinger beskrives og forklares.......Børns begreber om og forståelse af verdensrummet sættes ind i Piagets og Vygotskys teorier. Hverdagsforestillinger beskrives og forklares....

  11. Om religion og evolution

    DEFF Research Database (Denmark)

    Geertz, Armin W.

    2011-01-01

    for kulturens kausale virkning på den menneskelige kognition og ikke mindst den hominine evolution. Ud fra, hvad vi ved om den menneskelige evolution, ses det, at den hominine evolution har en dybde, som sjældent medtænkes i teorier og hypoteser om den menneskelige evolution. Den menneskelige evolution er...

  12. Om evalueringsforskningens relative autonomi

    DEFF Research Database (Denmark)

    2008-01-01

    Det empiriske udgangspunkt for artiklen "Om evalueringsforskningens relative autonomi - dansk normal evalueringsforskning som et ikke-autonomt (sub)felt i magtens felt" er en række tekster af fire dominerende danske evalueringsforskere. Det teoretiske udgangspunkt er især Pierre Bourdieus teori om...

  13. Om evalueringsforskningens relative autonomi

    DEFF Research Database (Denmark)

    Nørholm, Morten

    2008-01-01

    Det empiriske udgangspunkt for artiklen "Om evalueringsforskningens relative autonomi - dansk normal evalueringsforskning som et ikke-autonomt (sub)felt i magtens felt" er en række tekster af fire dominerende danske evalueringsforskere. Det teoretiske udgangspunkt er især Pierre Bourdieus teori om...

  14. Forestillinger om lykke

    DEFF Research Database (Denmark)

    Storm, Ida Marie; From, Ditte-Marie

    2016-01-01

    forlængelse heraf diskuterer artiklen, hvordan mødrene positionerer sig selv og andre i forhold til normen om det lykkelige moderskab. Analyserne peger på, at antagelser om, at den normale mor er den lykkelige mor, indsnævrer normalområdet og stiller potentielt både mistrivende og afvigende positioner til...

  15. Handbook of retrofit insulation systems. EFP - knowledge dissemination program; Haandbog om efterisoleringssystemer. EFP - Videnformidlingsprogram

    Energy Technology Data Exchange (ETDEWEB)

    Schultz, J.M.

    1999-11-01

    The handbook presents definitions and methods of calculations connected with calculations of heat losses from buildings. Methods of evaluating, moisture conditions and risk of condensation in construction are also presented. Retrofit insulation not only influences the energy consumption of a building, but also in the thermal condition in the building, which is why the terms thermal comfort and over temperature problematic are shortly described. There has been continuous attempts to illustrate the different subjects with examples. Subsequently the most used retrofit insulation methods, stating superior constructions, thermal conditions, moisture conditions, possibilities for energy conservation, and the advantages and disadvantages are described. The descriptions are intended to give an insight into the conditions, which are important in connection with retrofit insulation of buildings, but in the concrete case some more detailed analyses have to be presented. The handbook also describes fitted calculation programmes for calculation of detail solutions and calculation of resulted indoor climate and energy consumption, a view of measurement methods for thermal characterisation of construction, a view of relevant Danish and international standards and a view of research projects in the North relating to retrofit insulation systems. (EHS)

  16. Structural Health and Prognostics Management for Offshore Wind Turbines: Sensitivity Analysis of Rotor Fault and Blade Damage with O&M Cost Modeling

    Energy Technology Data Exchange (ETDEWEB)

    Myrent, Noah J. [Vanderbilt Univ., Nashville, TN (United States). Lab. for Systems Integrity and Reliability; Barrett, Natalie C. [Vanderbilt Univ., Nashville, TN (United States). Lab. for Systems Integrity and Reliability; Adams, Douglas E. [Vanderbilt Univ., Nashville, TN (United States). Lab. for Systems Integrity and Reliability; Griffith, Daniel Todd [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States). Wind Energy Technology Dept.

    2014-07-01

    Operations and maintenance costs for offshore wind plants are significantly higher than the current costs for land-based (onshore) wind plants. One way to reduce these costs would be to implement a structural health and prognostic management (SHPM) system as part of a condition based maintenance paradigm with smart load management and utilize a state-based cost model to assess the economics associated with use of the SHPM system. To facilitate the development of such a system a multi-scale modeling and simulation approach developed in prior work is used to identify how the underlying physics of the system are affected by the presence of damage and faults, and how these changes manifest themselves in the operational response of a full turbine. This methodology was used to investigate two case studies: (1) the effects of rotor imbalance due to pitch error (aerodynamic imbalance) and mass imbalance and (2) disbond of the shear web; both on a 5-MW offshore wind turbine in the present report. Sensitivity analyses were carried out for the detection strategies of rotor imbalance and shear web disbond developed in prior work by evaluating the robustness of key measurement parameters in the presence of varying wind speeds, horizontal shear, and turbulence. Detection strategies were refined for these fault mechanisms and probabilities of detection were calculated. For all three fault mechanisms, the probability of detection was 96% or higher for the optimized wind speed ranges of the laminar, 30% horizontal shear, and 60% horizontal shear wind profiles. The revised cost model provided insight into the estimated savings in operations and maintenance costs as they relate to the characteristics of the SHPM system. The integration of the health monitoring information and O&M cost versus damage/fault severity information provides the initial steps to identify processes to reduce operations and maintenance costs for an offshore wind farm while increasing turbine availability

  17. Tre teser om en legende

    DEFF Research Database (Denmark)

    Pedersen, Ove K.

    2013-01-01

    Hvordan at studere Grundtvig om deltager i opbygning af den danske nation? I bidrag præsenteres tre teser om nationsbygning og om legenders rolle i den sammenhæng. Bidrag er skrevet i forbindelse med internationalt komparativt projekt om nationsbygning......Hvordan at studere Grundtvig om deltager i opbygning af den danske nation? I bidrag præsenteres tre teser om nationsbygning og om legenders rolle i den sammenhæng. Bidrag er skrevet i forbindelse med internationalt komparativt projekt om nationsbygning...

  18. Fejder om Fortiden

    DEFF Research Database (Denmark)

    Gjerløff, Anne Katrine

    Fejder om fortiden udgives i forbindelse med Museeet på Sønderborgs Slots udstilling af samme navn. Bogen behandler de mangfoldige måder oldtiden bruges i nutiden på, og fortæller historien om den sønderjyske arkæologi historie og arkæologiens betydning i den sønderjyske identitet. Bogen indeholder...

  19. Fakta om integration

    DEFF Research Database (Denmark)

    Frederiksen, Hanne Winther; Nørredam, Marie

    Afsnit i Social- og Integrationsministeriets årlige publikation "Fakta om integration". Bygger på et litteraturreview foretaget i 2012 i samarbejde med Forskningscenter for Migration, Etnicitet og Sundhed (MESU) på opdrag af Social- og Integrationsministeriet.......Afsnit i Social- og Integrationsministeriets årlige publikation "Fakta om integration". Bygger på et litteraturreview foretaget i 2012 i samarbejde med Forskningscenter for Migration, Etnicitet og Sundhed (MESU) på opdrag af Social- og Integrationsministeriet....

  20. "Omsætningsproblemet"

    DEFF Research Database (Denmark)

    Jensen, Niels Rosendal

    2010-01-01

    Artiklen beskriver og analyserer med udgangspunkt i forskningsprojektet "Handlekompetence i pædagogisk arbejde" (HPA), hvordan professionelle har prøvet at omsætte ny, forskningsbaseret viden i deres dagligdag.......Artiklen beskriver og analyserer med udgangspunkt i forskningsprojektet "Handlekompetence i pædagogisk arbejde" (HPA), hvordan professionelle har prøvet at omsætte ny, forskningsbaseret viden i deres dagligdag....

  1. Barns tankar om ekologiska processer

    DEFF Research Database (Denmark)

    Helldén, Gustav

    Bogen indledes med en oversigt over forskning om læring i naturvidenskab, herunder gennemgås blandt andet Piagets teorier. Herefter følger Helldéns undersøgelser af elevforestillinger om økologiske processer. Helldén har interviewet eleverne om livsbetingelser og vækst, nedbrydning i naturen og om...

  2. Skovlovens bestemmelser om naturbeskyttelse

    DEFF Research Database (Denmark)

    Baaner, Lasse; Overby, Helene

    2013-01-01

    Det er ikke kun naturbeskyttelseslo­ven, men også skovloven, der beskyt­ter særlige naturtyper. Der er tale om egekrat, løvtræsskovbryn og det, der ofte kaldes småbiotoper.......Det er ikke kun naturbeskyttelseslo­ven, men også skovloven, der beskyt­ter særlige naturtyper. Der er tale om egekrat, løvtræsskovbryn og det, der ofte kaldes småbiotoper....

  3. Integration of a Three-Dimensional Process-Based Hydrological Model into the Object Modeling System

    Directory of Open Access Journals (Sweden)

    Giuseppe Formetta

    2016-01-01

    Full Text Available The integration of a spatial process model into an environmental modeling framework can enhance the model’s capabilities. This paper describes a general methodology for integrating environmental models into the Object Modeling System (OMS regardless of the model’s complexity, the programming language, and the operating system used. We present the integration of the GEOtop model into the OMS version 3.0 and illustrate its application in a small watershed. OMS is an environmental modeling framework that facilitates model development, calibration, evaluation, and maintenance. It provides innovative techniques in software design such as multithreading, implicit parallelism, calibration and sensitivity analysis algorithms, and cloud-services. GEOtop is a physically based, spatially distributed rainfall-runoff model that performs three-dimensional finite volume calculations of water and energy budgets. Executing GEOtop as an OMS model component allows it to: (1 interact directly with the open-source geographical information system (GIS uDig-JGrass to access geo-processing, visualization, and other modeling components; and (2 use OMS components for automatic calibration, sensitivity analysis, or meteorological data interpolation. A case study of the model in a semi-arid agricultural catchment is presented for illustration and proof-of-concept. Simulated soil water content and soil temperature results are compared with measured data, and model performance is evaluated using goodness-of-fit indices. This study serves as a template for future integration of process models into OMS.

  4. Om distributionen af hvidhed

    DEFF Research Database (Denmark)

    Frello, Birgitta

    2007-01-01

    Med udgangspunkt i John Fords Western, Forfølgeren fra 1956, præsenteres en analyse af repræsentationer af race og overskridelse af raceskel, særligt i relation til konstitueringen af subjektpositioner, hvorfra spørgsmål om hvidhed og ikke-hvidhed kan afgøres....

  5. Evalueringsrapport om Stressbehandlingskonferencen 2016

    DEFF Research Database (Denmark)

    Ladegaard, Yun Katrine; Jensen, Christian Gaden

    2016-01-01

    Vision for konferencen Stressbehandlingsforløb udbydes på hospitaler og arbejdspladser, i såvel kommunalt som privat regi. En tværgående vidensudvikling om de tilgængelige behandlinger og deres resultater har imidlertid manglet. Ved at samle forskere og praktikere i dansk stressbehandling er det ...

  6. Arbejdspapir om dogmeproduceret etnografi

    DEFF Research Database (Denmark)

    Kristensen, Regnar Albæk

    2016-01-01

    Etnografien har været antropologens varemærke, siden Boas og Malinowski gjorde monografierne til fagets kerneprodukt. Der har været meget diskussion om, hvor godt og præcist disse monografier beskrev de verdener, som antropologerne studerede, og siden bølgerne gik højest i 1980erne og 1990erne, har...

  7. Om musik og multimedier

    DEFF Research Database (Denmark)

    Knakkergaard, Martin

    1998-01-01

    Artiklen søger, gennem eksemplificering og diskussion, at problematisere forholdet musik og multimedia. Der er ikke tale om et forsøg på at nå til nogen endegyldig afgrænsning og bestemmelse af de karakteristika og betingelser, der kendetegner feltet. Formålet er derimod at belyse og præcisere...

  8. Legender om Norden

    DEFF Research Database (Denmark)

    Jensen-Rix, Robert William

    2015-01-01

    Gennem Middelalderen og indtil nyere tid har Skandinavien altid fremstået som et land i det fjerne - et udkants-Europa, om man vil. Hvis Skandinavien blev omtalt, var det ofte i forbindelse med de brutale vikingetogter der hærgede kontinentet og ikke mindst England... Weekendavisen, Sektion: 4, S...

  9. Om erkendelsesprocessernes historiske udvikling

    DEFF Research Database (Denmark)

    Lyhne, Jørgen

    2011-01-01

    I artiklen Om erkendelsesprocessernes historiske udvikling, reflekterer Jørgen Lyhne over indholdet i et 80 år gammelt forskningsprojekt. Den sovjet-russiske neuropsykolog A.R. Luria foretog i 1930-1931 et enestående forskningsprojekt, der gjorde et spændende forsøg på at belyse sammenhængen mellem...

  10. Historien om samspillet

    DEFF Research Database (Denmark)

    Clematide, Bruno

    2004-01-01

    arbejdsmarkedsuddannelserne og læringsaktiviteterne i virksomhederne er et centralt element i denne strategi. Med henblik på at give et bud på hvilke historiske erfaringer udviklingen af praksisnær kompetenceudvikling kan bygge på, handler denne artikel om samspillets historie i AMU-systemet. Artiklen slutter af med...

  11. Het roer moet om

    NARCIS (Netherlands)

    Wiegman, H.

    2013-01-01

    De recente gebeurtenissen rond de invoering en afschaffing van vrije tarieven in de mondzorg nopen tot bezinning. Een in deze donkere dagen actuele bezigheid. De dagen lengen overigens en wellicht gloort er ook voor de tandheelkunde licht aan de horizon. Maar dan moet het roer wel om, bepleit Herman

  12. OMS Annual Report, 1983.

    Science.gov (United States)

    Association of Research Libraries, Washington, DC. Office of Management Studies.

    This report describes 1983 Office of Management Studies (OMS) programs and services, including: (1) the Academic Library Program (ALP), which covered the Public Services Project, the Collection Analysis Project (CAP), the Small College Collection Assessment Project, the Preservation Planning Program, the Organizational Screening Program, the…

  13. OMS Annual Report, 1986.

    Science.gov (United States)

    Association of Research Libraries, Washington, DC. Office of Management Studies.

    This report describes the following 1986 Office of Management Studies (OMS) programs and services: (1) the Academic Library Program, which includes the Management Review and Analysis Program, the Public Services Study, the Planning Program for Small Academic Libraries, the Collection Analysis Project, the Leadership Development Program, the…

  14. OMS Annual Report, 1985.

    Science.gov (United States)

    Association of Research Libraries, Washington, DC. Office of Management Studies.

    This report describes the following 1985 Office of Management Studies (OMS) programs and services: (1) the Academic Library Program (ALP), which includes the Organizational Screening Program, the Collection Analysis Project (CAP), the Preservation Planning Program (PPP), the Public Services Study (PSS), the Management Review and Analysis Program…

  15. Arbejdspapir om dogmeproduceret etnografi

    DEFF Research Database (Denmark)

    Kristensen, Regnar Albæk

    2016-01-01

    Etnografien har været antropologens varemærke, siden Boas og Malinowski gjorde monografierne til fagets kerneprodukt. Der har været meget diskussion om, hvor godt og præcist disse monografier beskrev de verdener, som antropologerne studerede, og siden bølgerne gik højest i 1980erne og 1990erne, har...

  16. Mindfulness handler ikke om individualisering

    DEFF Research Database (Denmark)

    Jensen, Christian Gaden

    2013-01-01

    Kommentar til indlæg i Ugebrevet A4 om, at mindfulness virker individualiserende på arbejdspladsen.......Kommentar til indlæg i Ugebrevet A4 om, at mindfulness virker individualiserende på arbejdspladsen....

  17. Undervisning om energi

    DEFF Research Database (Denmark)

    Hoffmann, Birgitte; Carlsson, Monica

    Rapporten belyser, hvordan undervisning om energi kan bidrage til elevers lyst og evne til at handle på energiområdet. Projektet har særligt fokus på de mange aktører uden for folkeskolen, der på forskellig vis søger at sætte energi på dagsorden for børn og skole – fx energiselskaber og NGO...... Pædagogiske Universitet og Danmarks Tekniske Universitet og knytter således perspektiver fra to forskningsområder til en tværfaglig forståelsesramme for undervisning om energi. _________The general focus is to research children’s roles and possibilities for taking action in the energy area. The project deals...

  18. Evalueringsrapport om Stressbehandlingskonferencen 2017

    DEFF Research Database (Denmark)

    Ladegaard, Yun Katrine; Jensen, Christian Gaden; Andersen, Malene Friis

    2017-01-01

    Stressbehandlingskonferencen 2017 havde til formål at samle forskere og praktikere inden for forebyggelse og behandling af stress i Danmark for at sikre vidensdeling, udvikling og debat. Stressbehandlingskonferencen afholdes en gang årligt og tilsigter at skabe rum og netværk for at kvalificere og...... videreudvikle forebyggende interventioner og behandlingsmetoder på området. I 2016 var konferencens fokus kun på stressbehandling. Konferencen blev en stor succes med over 300 deltagere og evalueringen af konferencen var meget positiv. Deltagerne efterlyste dog mere viden om stressforebyggelse og...... stresshåndtering på arbejdspladserne. Stressbehandlingskonferencen (SBK) 2017 blev derfor udvidet til to dage. Den første dag fokuserede på at forstå, forebygge og håndtere stress på arbejdspladserne med udgangspunkt i forskning og praksis, mens den anden dag fokuserede på forskningsbaseret viden om...

  19. Om David Harvey

    DEFF Research Database (Denmark)

    Czeskleba-Dupont, Rolf; Schultz Jørgensen, Peter

    2015-01-01

    Harvey's geografiopfattelse præsenteres fra 'Explanation in Geography' (1969) til de seneste værker, hvor faget er hivet ud af elfenbenstårnet for at udgøre fundamentet til en 'people's geography'. Samtidigt er der sket en sammensmeltning af historisk og geografisk materialisme. Studier over...... 'kapitalen' gennemgås, hvor den geografiske dimension i kapitalens akkumulation er udarbejdet. Harvey's måde at videreføre Henri Lefebvre's tænkning om retten til byen bliver omtalt. Spørgsmålet rejses om arbejderklassen og byen. Og der fokuseres afsluttende på organisering af modstanden i et klassekamps-perspektiv....

  20. Designeres viden om plast

    OpenAIRE

    Eriksen, Kaare

    2013-01-01

    Industrielle designeres viden om plastmaterialer og plastindustriens fremstillingsprocesser er meget vigtige for den innovative styrke i dansk industri ifølge danske plastproducenter, designstuderende og praktiserende industrielle designere. Disse tre grupper besvarede den første danske landsdækkende undersøgelse, PD13, som undersøgte betydningen af industrielle designeres plastviden og samarbejdet mellem designere og plastindustrien. Dette paper beskriver en række resultater fra denne unders...

  1. En bevidsthed om sprog

    DEFF Research Database (Denmark)

    Tranekjær, Louise; Lassen, Nelima

    2002-01-01

    Denne artikel diskuterer, på baggrund af en rapport udarbejdet på Kultur- og Sprogmødestudier på RUC, hvordan kritisk sproglig bevidsthed kan bruges som et udgangspunkt for dialog om og med etniske minoriteter. Tesen er, at den tætte relation mellem vores syn på verden og vores måde at beskrive d...

  2. Lad os tale om INNOVATION

    DEFF Research Database (Denmark)

    Torfing, Jacob

    2014-01-01

    Der er behov for innovation i den offentlige sektor, og behov for at vi taler om INNOVATION uden sproglige omsvøber og forviklinger. Vi skal udvikle et klart og præcist sprog om innovation, for kun derigennem kan vi komme videre til de brændende spørgsmål om, hvordan vi fremmer offentlig innovati...

  3. Viden om inklusion

    DEFF Research Database (Denmark)

    Dyssegaard, Camilla Brørup; Larsen, Michael Søgaard

    Denne publikation er et bearbejdet uddrag af publikationen "Effekt og pædagogisk indsats ved inklusion af børn med særlige behov i grundskolen", der blev afsluttet i december 2012. Formålet med denne publikationer at præsentere lærere og skoleledere for den viden, vi nu har om hvilke strategier, ......, der har positiv virkning for inklusion i grundskolen på en praksisorienteret, kort, præcis og læsbar måde....

  4. Kampen om sandheden

    DEFF Research Database (Denmark)

    Glerup, Cecilie; Degnbol, Marie Chimwemwe

    2014-01-01

    Hvad betyder politiske kulturer for brugen af videnskab? Cecilie Glerup og Marie Degnbol undersøger, hvordan en dansk klima-NGO inddrager videnskab i sine forsøg på at skabe hårdtslående kritik på klimaområdet. Ifølge de to forfattere forsøger NGO’en at bekæmpe „falsk konfliktualitet“ – at folk e...... uenige om klimaforandringernes omfang, fordi de ikke kender den sande karakter af katastrofen. NGO’en ser med andre ord enighed og fællesskab som en betingelse for forandring, noget forfatterne mener, er levn fra Grundtvig og Højskolebevægelsen....

  5. Effects of complexation between organic matter (OM) and clay mineral on OM pyrolysis

    Science.gov (United States)

    Bu, Hongling; Yuan, Peng; Liu, Hongmei; Liu, Dong; Liu, Jinzhong; He, Hongping; Zhou, Junming; Song, Hongzhe; Li, Zhaohui

    2017-09-01

    The stability and persistence of organic matter (OM) in source rocks are of great significance for hydrocarbon generation and the global carbon cycle. Clay-OM associations commonly occur in sedimentation and diagenesis processes and can influence the pyrolytic behaviors of OM. In this study, clay-OM complexes, i.e., interlayer clay-OM complexes and clay-OM mixture, were prepared and exposed to high-pressure pyrolysis conditions in confined gold capsule reactors to assess variations in OM pyrolysis products in the presence of clay minerals. Three model organic compounds, octadecanoic acid (OA), octadecy trimethyl ammonium bromide (OTAB), and octadecylamine (ODA), were employed and montmorillonite (Mt) was selected as the representative clay mineral. The solid acidity of Mt plays a key role in affecting the amount and composition of the pyrolysis gases generated by the clay-OM complexes. The Brønsted acid sites significantly promote the cracking of hydrocarbons through a carbocation mechanism and the isomerization of normal hydrocarbons. The Lewis acid sites are primarily involved in the decarboxylation reaction during pyrolysis and are responsible for CO2 generation. Mt exhibits either a catalysis effect or pyrolysis-inhibiting during pyrolysis of a given OM depending on the nature of the model organic compound and the nature of the clay-OM complexation. The amounts of C1-5 hydrocarbons and CO2 that are released from the Mt-OA and Mt-ODA complexes were higher than those of the parent OA and ODA, respectively, indicating a catalysis effect of Mt. In contrast, the amount of C1-5 hydrocarbons produced from the pyrolysis of Mt-OTAB complexes was lower than that of OTAB, which we attribute to an inhibiting effect of Mt. This pyrolysis-inhibiting effect works through the Hoffmann elimination that is promoted by the catalysis of the Brønsted acid sites of Mt, therefore releasing smaller amounts of gas hydrocarbons than the nucleophilic reaction that is induced by the

  6. Space shuttle auxiliary propulsion system design study. Phase C report: Oxygen-hydrogen RCS/OMS integration study

    Science.gov (United States)

    Bruns, A. E.; Regnier, W. W.

    1972-01-01

    A comparison of the concepts of auxiliary propulsion systems proposed for the space shuttle vehicle is discussed. An evaluation of the potential of integration between the reaction control system and the orbit maneuvering system was conducted. Numerous methods of implementing the various levels of integration were evaluated. Preferred methods were selected and design points were developed for two fully integrated systems, one partially integrated system, and one separate system.

  7. Space shuttle auxiliary propulsion system design study. Phase C and E report: Storable propellants, RCS/OMS/APU integration study

    Science.gov (United States)

    Anglim, D. D.; Bruns, A. E.; Perryman, D. C.; Wieland, D. L.

    1972-01-01

    Auxiliary propulsion concepts for application to the space shuttle are compared. Both monopropellant and bipropellant earth storable reaction control systems were evaluated. The fundamental concepts evaluated were: (1) monopropellant and bipropellant systems installed integrally within the vehicle, (2) fuel systems installed modularly in nose and wing tip pods, and (3) fuel systems installed modularly in nose and fuselage pods. Numerous design variations within these three concepts were evaluated. The system design analysis and methods for implementing each of the concepts are reported.

  8. Internationalt samarbejde om BIM og digitale vejmodeller

    DEFF Research Database (Denmark)

    Rasmussen, Christian Fuglsang; Kjems, Erik

    2016-01-01

    Begrebet BIM (BygningsInformationsModellering) har for alvor ramt infrastruktursektoren, og der arbejdes i mange lande på at optimere håndteringen og udnyttelsen af data. Der er en generel enighed om effektiviseringspotentialet, samt at der er behov for internationale standarder. Følgende giver et...

  9. Internationalt samarbejde om BIM og digitale vejmodeller

    DEFF Research Database (Denmark)

    Rasmussen, Christian Fuglsang; Kjems, Erik

    2016-01-01

    Begrebet BIM (BygningsInformationsModellering) har for alvor ramt infrastruktursektoren, og der arbejdes i mange lande på at optimere håndteringen og udnyttelsen af data. Der er en generel enighed om effektiviseringspotentialet, samt at der er behov for internationale standarder. Følgende giver et...

  10. STS-39: OMS Pod Thruster Removal/Replace

    Science.gov (United States)

    1991-01-01

    Shown is the removal and replacement of the Discovery's orbital maneuvering systems (OMS) pod thruster. The OMS engine will be used to propel Discovery north, off of its previous orbital groundtrack, without changing the spacecraft's altitude. A burn with this lateral effect is known as "out-of-plane."

  11. View of OMS burn from the payload bay

    Science.gov (United States)

    1982-01-01

    View of Orbital Maneuvering System (OMS) burn from the payload bay. The closed cradles which held the communication satellites Columbia deployed are visible in the center of the frame. Parts of the spacecraft's wings can be seen on both the port and starboard sides can be seen. The vertical stabilizer is flanked by the twin OMS pods.

  12. A Model to Estimate the Operating and Maintenance (O&M) Costs of the Mine Resistant Ambush Protected (MRAP) Vehicles

    Science.gov (United States)

    2010-12-01

    September 28, 2010 from http://www.globalsecurity.org/military/systems/ground/mrap-var.htm Heizer , J., & Render, B. (2008). Operations Management ...Visibility & Management of Operation & Support Cost xv EXECUTIVE SUMMARY The role of High Mobility Multi-purpose Wheeled Vehicles (HMMWVs) in the United... Operating and Support Management Information System (OSMIS) and the Marine Corps’ Visibility and Management of Operating and Support Costs (VAMOSC

  13. Tro og viden om verden

    DEFF Research Database (Denmark)

    Buhl, Hans; Lauridsen, Kamma; Kristensen, Mette Maria

    2013-01-01

    Lærervejledning til undervisningsprojektet "Tro og Viden om verden". Projektet består af iBogen Tro og viden om verden og et tilhørende undervisningsforløb. Det er et tværfagligt projekt til 4.-6. klasse, som sætter fokus på forholdet mellem religion og naturvidenskab, ikke mindst i relation til....... Lærervejledningen er opbygget af tre dele. Første del indeholder forskellige oplysninger om projektets mål og muligheder. Dernæst følger en del med baggrundslæsning til læreren om tro, viden og verdensbilleder. Endelig er der en del med en introduktion til iBogen og en konkret undervisningsvejledning til de enkelte...

  14. Han digtede om det uudsigelige

    DEFF Research Database (Denmark)

    svendsen, erik

    2015-01-01

    Paul Celan skrev det vigtigste litterære vidnesbyrd om holocaust, inden han druknede sig i Seinen. Ny samling af hans uafrystelige og virtuost forfærdende poesi på dansk.......Paul Celan skrev det vigtigste litterære vidnesbyrd om holocaust, inden han druknede sig i Seinen. Ny samling af hans uafrystelige og virtuost forfærdende poesi på dansk....

  15. Nationalstaten taber kampen om eliteuddannelser

    DEFF Research Database (Denmark)

    Weirsøe, Mathilde

    2010-01-01

    EU kaster sig ind i kampen om at tiltrække de bedste studerende fra hele verden, for der er både penge og prestige i eliteuddannelser. De danske universiteter vil gerne med på det globale marked, men ryger ind i problemer med det danske princip om gratis uddannelse for alle. Men spørgsmålet er, h...

  16. Om akademisk dannelse i dag

    DEFF Research Database (Denmark)

    Hansen, Finn Thorbjørn

    2012-01-01

    Om den dimension i akademisk dannelse, der omhandler de etisk-eksistentielle aspekter ved højere uddannelses undervisning med udgangspunkt i Gadamers syn på dannelse og sandhed og erfaring.......Om den dimension i akademisk dannelse, der omhandler de etisk-eksistentielle aspekter ved højere uddannelses undervisning med udgangspunkt i Gadamers syn på dannelse og sandhed og erfaring....

  17. Shuttle performance enhancements using an OMS payload bay kit

    Science.gov (United States)

    Templin, Kevin C.; Mallini, Charles J.

    1991-01-01

    The study focuses on the use of an orbital maneuvering system (OMS) payload bay kit (PBK) designed to utilize OMS tanks identical to those currently employed in the Orbiter OMS pods. Emphasis is placed on payload deployment capability and payload servicing/reboost capability augmentation from the point of view of payload mass, maximum deployment altitudes, and initial retrieval and final deployment altitudes. The deployment, servicing, and reboost requirements of the Hubble Space Telescope and Advanced X-ray and Astrophysics Facility are analyzed in order to show the benefits an OMS PBK can provide for these missions. It is shown that OMS PBKs can provide the required capability enhancement necessary to support deployment, reboost, and servicing of payloads requiring altitudes greater than 325 nautical miles.

  18. XMM-Newton observations of OY Car III: OM light curve modelling, X-ray timing and spectral studies

    CERN Document Server

    Hakala, P; Hakala, Pasi; Ramsay, Gavin

    2003-01-01

    We revisit the XMM-Newton observations of the dwarf nova OY Car taken in July 2000 which occured shortly after an outburst. Ramsay et al (2001a) found a prominent energy dependent modulation at a period of 2240 sec: this modulation was only seen for app. 1/3 of the observation duration. In our new analysis, we examine this time interval in greater detail. In addition to the 2240 sec period we find evidence for other periods, the most prominent being near 3500 sec. Both these modulations are most likely due to changes in photoelectric absorption over this period: this is supported by phase-resolved spectroscopy. This may indicate the presence of matter above the accretion disc or a presence of a magnetic accretion curtain. In this case the 2240 sec period could represent a spin period of the white dwarf and the 3500 sec period a beat period between the spin and orbital periods. We also model the B band and UV eclipse profiles and light curves using a new technique to map the spatial extent of the accretion dis...

  19. Om visse køberetlige regler om sikkerhedsmangler

    DEFF Research Database (Denmark)

    Møgelvang-Hansen, Peter

    2008-01-01

    mangler ved salgsgenstanden. Bestemmelsen indebærer, at en køber, der lider tab som følge af mangler ved salgsgenstanden, ikke alene kan rejse krav om erstatning for udgifter forbundet med dækningskøb, afsavnserstatning, erstatning for driftstab mv., men også erstatning for det tab, køberen måtte have...... at disse frister ikke finder anvendelse, hvis salgsgenstanden lider af en sikkerhedsmangel. Ved sådanne mangler vil køberens mangelskrav herefter alene være reguleret af de almindelige forældelsesregler, jf. lov nr. 522 af 6. juni 2007 om forældelse af fordringer. Endelig har udvalget drøftet, om der bør...

  20. Når vi taler om 68

    DEFF Research Database (Denmark)

    Jensen, Henrik; Metz, Georg

    Når vi taler om 68 er en intellektuel samtale mellem to ligeværdige gentlemen og skallesmækkere. En essayistisk dyst om porno, RAF, Pittelkow og livsfilosofi......Når vi taler om 68 er en intellektuel samtale mellem to ligeværdige gentlemen og skallesmækkere. En essayistisk dyst om porno, RAF, Pittelkow og livsfilosofi...

  1. Om universiteternes organisering

    DEFF Research Database (Denmark)

    Foss, Nicolai Juul

    English summary: The paper analyzes the Danish university system,using a property rights/organizational economics approach. Particularattention is devoted the complicated agency problem in the system. Thepaper recommends more differentiation of pay structures within thesystem, more use of tournam......English summary: The paper analyzes the Danish university system,using a property rights/organizational economics approach. Particularattention is devoted the complicated agency problem in the system. Thepaper recommends more differentiation of pay structures within thesystem, more use...

  2. Glow phenomenon surrounding the vertical stabilizer and OMS pods

    Science.gov (United States)

    1994-01-01

    This 35mm frame, photographed as the Space Shuttle Columbia was orbiting Earth during a 'night' pass, documents the glow phenomenon surrounding the vertical stabilizer and the Orbital Maneuvering System (OMS) pods of the spacecraft.

  3. Forestillinger om kvinden i sygeplejefaget

    DEFF Research Database (Denmark)

    Holen, Mari

    2008-01-01

    Kapitlet analyserer forestillingen om at kvindelighed og sygeplejefaget hører sammen. Den teoretiske optik er Judith Butlers opgør med forestillingen om, at kønnet har en biologisk komponent og en social/kulturel komponent. Kapitlet er en analyse af forskellige tekster skrevet af tre forskellige...... forbinder kvinden til sygeplejefaget. Denne forbindelselinje er dog på mange måder paradoksal, hvilket fremkommer ved at læse teksterne i lyset af Butlers kritik af skellet mellem sex og gender. For på den ene side beskrives det kvidnelige om særlig værdifuldt i forhold til sygeplejefaget, og på den anden...

  4. Kampen om ressourcerne

    DEFF Research Database (Denmark)

    Czeskleba-Dupont, Rolf

    2013-01-01

    Ud fra verdens-system analysen af I.Wallerstein, politiske geografer og tidsskriftet Journal of world systems research skitseres globaliseringens bølger siden 1500-tallet. Latinamerikas betydning fremhæves som pionerer i afkolonisering både før og nu, dog stadig underlagt verdensmarkedets...

  5. Kampen om ressourcerne

    DEFF Research Database (Denmark)

    Czeskleba-Dupont, Rolf

    2013-01-01

    Ud fra verdens-system analysen af I.Wallerstein, politiske geografer og tidsskriftet Journal of world systems research skitseres globaliseringens bølger siden 1500-tallet. Latinamerikas betydning fremhæves som pionerer i afkolonisering både før og nu, dog stadig underlagt verdensmarkedets...

  6. Forskning om tvang i misbrugsbehandling

    DEFF Research Database (Denmark)

    Deding, Mette

    I Danmark er der begrænset mulighed for brug af tvang i behandlingen af stof- og alkoholmisbrugere. Det kan kun finde sted i forbindelse med en kontrakt om ”frivillig tvang” i behandlingen af gravide alkoholmisbrugere. I Sverige og Norge giver loven mulighed for brug af tvang, og i USA er tvang l...... anvendelse af tvang blandt det faglige personale. Kortlægningen er foretaget efter principperne i Campbell-metoden og udført af SFI Campbell. Den inddrager 70 studier, heraf 42 om effekten af tvang i behandlingen. Undersøgelsen er bestilt og finansieret af Socialministeriet....

  7. Syv myter om begyndersprog

    DEFF Research Database (Denmark)

    Kirkebæk, Mads Jakob; Lund, Karen

    2014-01-01

    In the article the authors have selected seven myths about beginners’ language for discussion, re-flection and possible rejection. These are (1) the myth about the necessity of mastering the system before being able to speak the language, (2) the myth about limited capacity on the ‘hard disc’, (3...... something out of) say(ing)s it?...

  8. Om guldbiller, Bach og basepar

    DEFF Research Database (Denmark)

    Mogensen, T.E.

    2003-01-01

    I sin stærkt encyklopædiske roman The Gold Bug Variations søger den amerikanske forfatter Richard Powers gennem utallige detaljer, synekdoker og intrikate forbindelser at inddrage al verden og radikalt udvide romanens rum. Men romanen er også, eller især, en fortælling om kærlighed....

  9. Bogen om GIS og geodata

    DEFF Research Database (Denmark)

    Balstrøm, Thomas; Jacobi, Ole; Bodum, Lars

    OM INDHOLDET: Kort har gennem århundreder været brugt til at afbilde fænomener på vores runde Jord på papir, men i dagens IT-samfund håndteres de i computere ved brug af geografiske informationssystemer - forkortet GIS. I dem er det for eksempel muligt at koble kortinformationer med registeroplys......OM INDHOLDET: Kort har gennem århundreder været brugt til at afbilde fænomener på vores runde Jord på papir, men i dagens IT-samfund håndteres de i computere ved brug af geografiske informationssystemer - forkortet GIS. I dem er det for eksempel muligt at koble kortinformationer med...... kriterier osv. I systemerne findes der også værktøjer til beregning af korteste vej i vejnetværk og analyser på cellebaserede data som eksempelvis digitale højdemodeller. I denne første dansksprogede lærebog gives der en introduktion til de basale begreber i forståelsen af GIS eksemplificeret ved fokus på...... geodata i databaser, analysemetoder, kartografiske principper, metadata (data om data) og udvalgte eksempler på geodata til brug for den offentlige forvaltning, private virksomheder og borgere. Bogen afrundes med en perspektivering om mulighederne i fremtidens brug af GIS og geodata, som desværre ikke har...

  10. Bogen om GIS og geodata

    DEFF Research Database (Denmark)

    Balstrøm, Thomas; Jacobi, Ole; Bodum, Lars

    OM INDHOLDET: Kort har gennem århundreder været brugt til at afbilde fænomener på vores runde Jord på papir, men i dagens IT-samfund håndteres de i computere ved brug af geografiske informationssystemer - forkortet GIS. I dem er det for eksempel muligt at koble kortinformationer med registeroplys......OM INDHOLDET: Kort har gennem århundreder været brugt til at afbilde fænomener på vores runde Jord på papir, men i dagens IT-samfund håndteres de i computere ved brug af geografiske informationssystemer - forkortet GIS. I dem er det for eksempel muligt at koble kortinformationer med...... kriterier osv. I systemerne findes der også værktøjer til beregning af korteste vej i vejnetværk og analyser på cellebaserede data som eksempelvis digitale højdemodeller. I denne første dansksprogede lærebog gives der en introduktion til de basale begreber i forståelsen af GIS eksemplificeret ved fokus på...... geodata i databaser, analysemetoder, kartografiske principper, metadata (data om data) og udvalgte eksempler på geodata til brug for den offentlige forvaltning, private virksomheder og borgere. Bogen afrundes med en perspektivering om mulighederne i fremtidens brug af GIS og geodata, som desværre ikke har...

  11. Rundt om logistikstrategien med Coloplast

    DEFF Research Database (Denmark)

    Englyst, Linda

    2005-01-01

    I denne artikel illustreres et udviklingsforløb i Coloplast A/S om hvordan strategiudvikling og strategiformulering kan gribes an i en afbalanceret top-down og bottom-up tilgang, der drager nytte af en flerstrenget, eksperimenterende organisatorisk læring. Der diskuteres, hvordan forløbet adskiller...

  12. Orbiter OMS and RCS technology

    Science.gov (United States)

    Boudreaux, R. A.

    1982-01-01

    Orbiter Orbital Maneuver Subsystem (OMS) and Reaction Control Subsystem (RCS) tankage has proved to be highly successful in shuttle flights on-orbit propellant transfer tests were done. Tank qualification tests along with flight demonstrations were carried out future uses of storable propellants are cited.

  13. Om guldbiller, Bach og basepar

    DEFF Research Database (Denmark)

    Mogensen, T.E.

    2003-01-01

    I sin stærkt encyklopædiske roman The Gold Bug Variations søger den amerikanske forfatter Richard Powers gennem utallige detaljer, synekdoker og intrikate forbindelser at inddrage al verden og radikalt udvide romanens rum. Men romanen er også, eller især, en fortælling om kærlighed....

  14. Hvordan bibliotekarer tenker om litteraturformidling

    DEFF Research Database (Denmark)

    Kann-Christensen, Nanna; Balling, Gitte

    2013-01-01

    Et nyt dansk forskningsprojekt viser at litteraturformidling tjener mange andre formål end bare at give læsere oplevelse gennom bibliotekbesøg og læsning. Elementer som bibliotekets synlighed i lokalsamfundet og bibliotekarenes egen kærlighed til litteraturen figurerer side om side med det biblio...

  15. World energy projection system: Model documentation

    Energy Technology Data Exchange (ETDEWEB)

    1992-06-01

    The World Energy Project System (WEPS) is an accounting framework that incorporates projects from independently documented models and assumptions about the future energy intensity of economic activity (ratios of total energy consumption divided by gross domestic product) and about the rate of incremental energy requirements met by hydropower, geothermal, coal, and natural gas to produce projections of world energy consumption published annually by the Energy Information Administration (EIA) in the International Energy Outlook (IEO) (Figure 1). Two independently documented models presented in Figure 1, the Oil Market Simulation (OMS) model and the World Integrated Nuclear Evaluation System (WINES) provide projections of oil and nuclear power consumption published in the IEO. Output from a third independently documented model, and the International Coal Trade Model (ICTM), is not published in the IEO but is used in WEPS as a supply check on projections of world coal consumption produced by WEPS and published in the IEO. A WEPS model of natural gas production documented in this report provides the same type of implicit supply check on the WEPS projections of world natural gas consumption published in the IEO. Two additional models are included in Figure 1, the OPEC Capacity model and the Non-OPEC Oil Production model. These WEPS models provide inputs to the OMS model and are documented in this report.

  16. Main: 1OM1 [RPSD[Archive

    Lifescience Database Archive (English)

    Full Text Available 1OM1 トウモロコシ Corn Zea mays L. Casein Kinase Ii, Alpha Chain Name=Ack2; Zea Mays Mole...ELLVDLQDYDYSLDMWSLGCMFAGMIFRKEPFFYGHDNHDQLVKIAKVLGTDGLNVYLNKYRIELDPQLEALVGRHSRKPWLKFMNADNQHLVSPEAIDFLDKLLRYDHQERLTALEAMTHPYFQQVRAAENSRTRA corn_1OM1.jpg ...

  17. Til fiktiv samtale om dannelse og kompetencer

    DEFF Research Database (Denmark)

    Brok, Lene Storgaard

    2016-01-01

    Grundtvig, Brandes og andre betydningsfulde personer deltager i fiktiv samtale om dannelse og kompetencer......Grundtvig, Brandes og andre betydningsfulde personer deltager i fiktiv samtale om dannelse og kompetencer...

  18.  Blogger du om vejledning?

    DEFF Research Database (Denmark)

    Thomsen, Rie; Hohwü-Christensen, Stine

    2007-01-01

    Blog om vejledning på http://www.guidance-europe.org/ Hvad er vejledning, og hvad ved man om det? Hvordan skulle Sokrates' tanker om det gode liv kunne hjælpe med at træffe uddannelses- eller karrierevalg i 2007?  Hvad betyder egentlig VidensCenter for Vejledning? Og hvorfor i det hele taget al d...

  19. Using the object modeling system for hydrological model development and application

    Directory of Open Access Journals (Sweden)

    S. Kralisch

    2005-01-01

    Full Text Available State of the art challenges in sustainable management of water resources have created demand for integrated, flexible and easy to use hydrological models which are able to simulate the quantitative and qualitative aspects of the hydrological cycle with a sufficient degree of certainty. Existing models which have been de-veloped to fit these needs are often constrained to specific scales or purposes and thus can not be easily adapted to meet different challenges. As a solution for flexible and modularised model development and application, the Object Modeling System (OMS has been developed in a joint approach by the USDA-ARS, GPSRU (Fort Collins, CO, USA, USGS (Denver, CO, USA, and the FSU (Jena, Germany. The OMS provides a modern modelling framework which allows the implementation of single process components to be compiled and applied as custom tailored model assemblies. This paper describes basic principles of the OMS and its main components and explains in more detail how the problems during coupling of models or model components are solved inside the system. It highlights the integration of different spatial and temporal scales by their representation as spatial modelling entities embedded into time compound components. As an exam-ple the implementation of the hydrological model J2000 is discussed.

  20. Hvorfor al den snak om etik?

    DEFF Research Database (Denmark)

    Hjort, Katrin

    2010-01-01

    Denne artikel handler om pædagogers professionsetik, og om hvordan pædagoger – som andre velfærdsprofessionelle inden for uddannelse, sundhed og socialt arbejde – i dag er spændt ud mellem på den ene side den klassiske velfærdsstats pligtetik, kravet om at give ”alt det bedste til alle”, og på de...

  1. Space Shuttle AFRSI OMS pod environment test using model 81-0 test fixture in the Ames Research Center 9x7-foot supersonic wind tunnel (OS-314A/B/C)

    Science.gov (United States)

    Collette, J. G. R.

    1984-01-01

    A test was conducted in the NASA/Ames Research Center 9x7-foot Supersonic Wind Tunnel to help resolve an anomaly that developed during the STS-6 orbiter flight wherein sections of the Advanced Flexible Reusable Surface Insulation (AFRSI) covering the OMS pods suffered some damage. A one-third scale two-dimensional shell structure model of an OMS pod cross-section was employed to support the test articles. These consisted of 15 AFRSI blanket panels form-fitted over the shell structures for exposure to simulated flight conditions. Of six baseline blankets, two were treated with special surface coatings. Two other panels were configured with AFRSI sections removed from the OV099 orbiter vehicle after the STS-6 flight. Seven additional specimens incorporated alternative designs and repairs. Following a series of surface pressure calibration runs, the specimens were exposed to simulated ascent and entry dynamic pressure profiles. Entry conditions included the use of a vortex generator to evaluate the effect of shed vortices on the AFRSI located in the area of concern.

  2. Omsætning af fast ejendom

    DEFF Research Database (Denmark)

    Edlund, Hans Henrik

    Bogen er en systematisk gennemgang af lov om omsætning af fast ejendom, der regulerer ejendomsmægleres virke. Følgende emner er bl.a. behandlet: Hvem kan drive ejendomsmæglervirksomhed og ejendomsmæglernes pligter og ansvar.......Bogen er en systematisk gennemgang af lov om omsætning af fast ejendom, der regulerer ejendomsmægleres virke. Følgende emner er bl.a. behandlet: Hvem kan drive ejendomsmæglervirksomhed og ejendomsmæglernes pligter og ansvar....

  3. Den brede, folkelige debat om EU

    DEFF Research Database (Denmark)

    Dosenrode, Søren

    2005-01-01

    I Danmark er EUropa noget fjernt på trods af, at EU er rammen om dansk politik, både udenrigs og indenrigs. Danmark er medlem af en de facto føderation, men de brede folkelige debater om hvordan EU skal gestaltes har manglet.......I Danmark er EUropa noget fjernt på trods af, at EU er rammen om dansk politik, både udenrigs og indenrigs. Danmark er medlem af en de facto føderation, men de brede folkelige debater om hvordan EU skal gestaltes har manglet....

  4. Kampen om matfatet og matproduksjonen

    Directory of Open Access Journals (Sweden)

    Hans Morten Haugen

    2013-05-01

    Full Text Available Antallet sultne i verden har økt, selv om det kan diskuteres om det i dag er en høyere eller lavere andel som lider under sult enn for seks år siden – før matprisøkningen. Alle er uansett enige om at det samlet sett produseres nok mat i verden til at alle kan få dekket sine ernæringsbehov. Artikkelen viser at to hovedretninger i debatten om matproduksjon står mot hverandre. Den dominerende retningen fokuserer primært på matsikkerhet, forstått som økt matproduksjon og økt handel med mat. Den andre retningen argumenterer for at interessene og rettighetene for de mest sårbare må ha forrang i politiske prioriteringer, og at de sårbare sikres best med en strategi basert på menneskerettigheter. Artikkelen drøfter landfordeling, økt bruk av genteknologi i landbruket og nedbygging av handelshindre for landbruksprodukter. Industrialisering av landbruket og liberalisering av handelen med landbruksvarer kan gi gode resultater på makronivå – på kort sikt. Dersom målet er å fremme situasjonen for de mest sårbare og samtidig møte klimautfordringene er løsningen en nedenfra-tilnærming, som til nå er blitt ignorert av de fleste stater.Nøkkelord: retten til mat, matsikkerhet, klima, Verdens handelsorganisasjon, FNs tusenårsmålEnglish summary: The struggle over food intake and food productionThe number of hungry persons in the world has increased – although it is debatable whether there is currently a higher or lower proportion of suffering from hunger than six years ago – before the food price increases. All agree that the overall production of food in the world is adequate for everyone's nutritional needs. The article demonstrates that there are two main approaches in the debate on food production. The dominant approach focuses primarily on food security, understood as increased food production and increased food trade. The other approach argues that the interests and rights of the most vulnerable must prevail, and that

  5. A comparison of observed extreme water levels at the German Bight elaborated through an extreme value analysis (EVA) with extremes derived from a regionally coupled ocean-atmospheric climate model (MPI-OM)

    Science.gov (United States)

    Möller, Jens; Heinrich, Hartmut

    2017-04-01

    As a consequence of climate change atmospheric and oceanographic extremes and their potential impacts on coastal regions are of growing concern for governmental authorities responsible for the transportation infrastructure. Highest risks for shipping as well as for rail and road traffic originate from combined effects of extremes of storm surges and heavy rainfall which sometimes lead to insufficient dewatering of inland waterways. The German Ministry of Transport and digital Infrastructure therefore has tasked its Network of Experts to investigate the possible evolutions of extreme threats for low lands and especially for Kiel Canal, which is an important shortcut for shipping between the North and Baltic Seas. In this study we present results of a comparison of an Extreme Value Analysis (EVA) carried out on gauge observations and values derived from a coupled Regional Ocean-Atmosphere Climate Model (MPI-OM). High water levels at the coasts of the North and Baltic Seas are one of the most important hazards which increase the risk of flooding of the low-lying land and prevents such areas from an adequate dewatering. In this study changes in the intensity (magnitude of the extremes) and duration of extreme water levels (above a selected threshold) are investigated for several gauge stations with data partly reaching back to 1843. Different methods are used for the extreme value statistics, (1) a stationary general Pareto distribution (GPD) model as well as (2) an instationary statistical model for better reproduction of the impact of climate change. Most gauge stations show an increase of the mean water level of about 1-2 mm/year, with a stronger increase of the highest water levels and a decrease (or lower increase) of the lowest water levels. Also, the duration of possible dewatering time intervals for the Kiel-Canal was analysed. The results for the historical gauge station observations are compared to the statistics of modelled water levels from the coupled

  6. Methodology - evaluation of strategies -and the system for taking care of spent nuclear fuel; Metodval - utvaerdering av strategier och system foer att ta hand om anvaent kaernbraensle

    Energy Technology Data Exchange (ETDEWEB)

    2010-10-15

    This report deals with the question of how the Swedish spent nuclear fuel is to be disposed of. What are the requirements? What are the alternatives? In the main chapter of the report, an evaluation is made of the KBS-3 method compared with other strategies and systems for final disposal of spent nuclear fuel. An appendix to the report presents in general terms how the KBS-3 method has developed from the end of the 1970s up to today. The report is one of a number of supporting documents for SKB's applications for construction and operation of the final repository for spent nuclear fuel. In parallel with and as a basis for the present report, SKB has prepared the reports 'Principer, strategier och system foer slutligt omhaendertagande av anvaent kaernbraensle' ('Principles, strategies and systems for final disposal of spent nuclear fuel') /Grundfelt 2010a/, 'Jaemfoerelse mellan KBS-3-metoden och deponering i djupa borrhaal foer slutlig foervaring av anvaent kaernbraensle' ('Comparison between the KBS-3 method and deposition in deep boreholes for final disposal of spent nuclear fuel') /Grundfelt 2010b/ and 'Utvecklingen av KBS-3-metoden. Genomgaang av forskningsprogram, saekerhetsanalyser, myndighetsgranskningar samt SKB:s internationella forskningssamarbete' ('Development of the KBS-3 method. Review of research programmes, safety assessments, regulatory reviews and SKB's international research cooperation') /SKB 2010a/. The reports are in Swedish, but contain summaries in English. The first report is an update of the comprehensive account of alternative methods presented by SKB in 2000. The second report presents a comparison between the KBS-3 method and the Deep Boreholes concept, plus a status report on research and development in the area of Deep Boreholes. The last report describes how the KBS-3 method has been developed from the end of the 1970s up to today. It further describes how the

  7. Glow experiment documentation of OMS/RCS pods and vertical stabilizer

    Science.gov (United States)

    1982-01-01

    Glow experiment documentation of orbital maneuvering system (OMS) reaction control system (RCS) pods and vertical stabilizer shows chemoluminescent effect resulting from atomic oxygen impacting the spacecraft and building to the point that the atomic oxygen atoms combine to form molecules of oxygen. Image intensifier on NIKON 35mm camera used to record glow on vertical tail and OMS pods.

  8. XML Schema of PaGE-OM: fuge.xsd [

    Lifescience Database Archive (English)

    Full Text Available cters that identifies an abstract or physical resource. FuGE (http://fuge.sourceforge.net/) is a model of the shared compon...://www.omg.org/spec/PAGE-OM/20090722/snp schemaLocation=snp.xsd/> ... type=fuge:Ontology_source/> rce> The source... maxOccurs=1> A URI is short for Uniform Resource Identifier.

  9. Model Systems

    Directory of Open Access Journals (Sweden)

    Francisco Rodríguez-Trelles

    1998-12-01

    Full Text Available Current efforts to study the biological effects of global change have focused on ecological responses, particularly shifts in species ranges. Mostly ignored are microevolutionary changes. Genetic changes may be at least as important as ecological ones in determining species' responses. In addition, such changes may be a sensitive indicator of global changes that will provide different information than that provided by range shifts. We discuss potential candidate systems to use in such monitoring programs. Studies of Drosophila subobscura suggest that its chromosomal inversion polymorphisms are responding to global warming. Drosophila inversion polymorphisms can be useful indicators of the effects of climate change on populations and ecosystems. Other species also hold the potential to become important indicators of global change. Such studies might significantly influence ecosystem conservation policies and research priorities.

  10. Om arkitektur - en kort indledende promenade

    DEFF Research Database (Denmark)

    Oxvig, Henrik

    2013-01-01

    Introduktion til arkitektur og rum for unge, nysgerrige mennesker. Vægten er lagt på bevægelse; introduktionen promenerer gennem arkitekturhistorien og søger at pege på, at historien - fortællingen - handler om noget som ikke er historie, nemlig om arkitektur, rum....

  11. Rapport om DanDiaSyn-projektet

    DEFF Research Database (Denmark)

    Jørgensen, Henrik; Hagedorn, Karen

    2009-01-01

    Artiklen gør rede for hovedprincipperne bag det indsamlingsarbejde om dansk dialektsyntaks som forfatterne deltog i 2007-9......Artiklen gør rede for hovedprincipperne bag det indsamlingsarbejde om dansk dialektsyntaks som forfatterne deltog i 2007-9...

  12. Methoden om allergenen in voedsel te detecteren

    NARCIS (Netherlands)

    Ezendam, J.; Bremer, M.G.E.G.; Loveren, van H.

    2005-01-01

    Vanuit Europese regelgeving geldt per1 november 2005 de verplichting om de aanwezigheid van allergie opwekkende stoffen (allergenen) op de etiketten van voedingsproducten te vermelden. Om dit beleid goed te handhaven moet bekend zijn hoeveel allergenen een mens binnen mag krijgen voordat er een alle

  13. Omsættelige forureningstilladelser i USA

    DEFF Research Database (Denmark)

    Svendsen, Gert Tinggaard

    1992-01-01

    I en tidligere artikel i Samfundsøkonomen, har Hjorth-Andersen på overbevisende måde beskrevet de teoretiske fordele ved en eventuel inddragelse af "omsættelige forureningstilladelser" i miljøreguleringen. Spørgsmålet er, om de teoretiske forventninger kan indfries i praksis. Her kan erfaringerne...

  14. Viden om strategiske partnerskaber i byggeriet

    DEFF Research Database (Denmark)

    Kristiansen, Kristian

    i byggeriet. Imidlertid er forskningen indenfor området begrænset af omfang, ligesom der i det hele taget ikke er skrevet meget om emnet. Men i andre brancher tog udviklingen af strategiske partnerskaber fart allerede i 1980`erne. Litteraturen om og forskningen i strategiske partnerskaber generelt...

  15. Folkeoplysning om bæredygtig udvikling

    DEFF Research Database (Denmark)

    Læssøe, Jeppe

    2007-01-01

    folkelige engagement i bæredygtig udvikling - trods indsatsen i 90'erne - har været faldende, er denne harmoni-forestilling ikke blevet udfordret. Artiklen slutter med et forslag om at nytænke didaktikken i folkeoplysningen om bæredygtig udvikling med udgangspunkt i en erkendelse af de dilemmaer, der...

  16. Rapport om DanDiaSyn-projektet

    DEFF Research Database (Denmark)

    Jørgensen, Henrik; Hagedorn, Karen

    2009-01-01

    Artiklen gør rede for hovedprincipperne bag det indsamlingsarbejde om dansk dialektsyntaks som forfatterne deltog i 2007-9......Artiklen gør rede for hovedprincipperne bag det indsamlingsarbejde om dansk dialektsyntaks som forfatterne deltog i 2007-9...

  17. ARL/OMS Consultant Training Program.

    Science.gov (United States)

    Euster, Joanne R.

    1982-01-01

    Describes Academic Library Consultant Training Program begun in 1979, sponsored by Office of Management Studies (OMS) and designed to provide 80 consultants to aid academic libraries in improving performance. Viewpoints are included from OMS Director and participants concerning program objectives, trainee selection, workshops, internships, and the…

  18. Costo/efficacia della prevenzione di infezioni alle prime vie aeree mediante un estratto batterico immunostimolante aspecifico (OM-85

    Directory of Open Access Journals (Sweden)

    Orietta Zaniolo

    2005-09-01

    Full Text Available OBJECTIVES: To estimate the pharmacoeconomical impact of preventing recurrent upper respiratory tract infections (URTIs with OM-85, a non-specific immunostimulating agent, in at-risk children. METHODS: Implementation of a decisional model. The evaluation of effectiveness (number of prevented URTIs/therapeutic cycle was based on weighted average of the results of four randomized, double-blind, placebo-controlled trials identified by literature reviewing. The clinical events considered in the model were natural resolution of the infection, onset of complications (acute otitis media, sinusitis, others and their evolution. Baseline event probabilities were derived by reviewing published data in the literature. URTI-related direct and indirect costs supported by patient, by Italian health system and by community were structured according with the principal guidelines and implemented with current Italian prices and tariffs. The cost/ effectiveness of OM-85 was calculated for five scenarios, differing in the number of therapeutic cycles, grade of patient co-payment and other secondary assumptions. Sensibility analyses were performed to evaluate the model robustness. RESULTS: Immunostimulation with one cycle of OM-85 prevented on average 1,60 URTI/patient in six months (RR = 0,515. In the basic scenario, this preventive action induced savings for 107,42 euro/patient in the perspective of the patient’s family, for 48,52 euro/patient in the perspective of Italian health system and for 231,26 in the community perspective. Sensibility analyses confirmed the robustness of basic scenario results. Threshold analyses showed that OM-85 prophylaxis is economically convenient as long as more than 7% of infections are prevented or global cost of one episode of URTI is greater than 10,00 euro. CONCLUSIONS: Non-specific immunotherapy with OM-85 induces a reduction in the incidence of URTIs in atrisk children with a concurrent saving for patient and health system.

  19. View of the firing of a single engine OMS

    Science.gov (United States)

    1985-01-01

    View of a single engine orbital maneuvering system (OMS) firing on the Discovery. The payload bay is open and the protective canisters for the AUSSAT communications satellite (open) and the ASC-1 are visible. A cloudy Earth's horizon can be seen above the orbiter.

  20. Om de såkaldte fejlslutninger

    DEFF Research Database (Denmark)

    Widell, Peter

    2008-01-01

    I artiklen, der er et bidrag til logik og argumentationsteori, tages de såkaldte fejlslutninger op til behandling. Det hævdes, at den nylige litteratur om emnet i Danmark ikke er opdateret om de sidste 30 års internationale debat. I et forsøg på at rode bod på denne tingenes tilstand gives et rids...

  1. Overall view of PLB and OMS / RCS engine thrusting

    Science.gov (United States)

    1983-01-01

    Overall payload bay (PLB) view shows Inertial Upper Stage (IUS) Airborne Support Equipment (ASE) forward frame and aft frame tilt actuator (AFTA) table after IUS Tracking and Data Relay Satellite (TDRS) deploy. Vertical tail and Orbital Maneuvering System (OMS) pods with rear reaction control system (RCS) thruster firing (sidefiring) appears in background against blackness of space. Right right jet firing was photographed from more than 18 meters (60 feet) away in the cabin of the Earth-orbiting Challenger, Orbiter Vehicle (OV) 099.

  2. Nonparametric reconstruction of the Om diagnostic to test LCDM

    CERN Document Server

    Escamilla-Rivera, Celia

    2015-01-01

    Cosmic acceleration is usually related with the unknown dark energy, which equation of state, w(z), is constrained and numerically confronted with independent astrophysical data. In order to make a diagnostic of w(z), the introduction of a null test of dark energy can be done using a diagnostic function of redshift, Om. In this work we present a nonparametric reconstruction of this diagnostic using the so-called Loess-Simex factory to test the concordance model with the advantage that this approach offers an alternative way to relax the use of priors and find a possible 'w' that reliably describe the data with no previous knowledge of a cosmological model. Our results demonstrate that the method applied to the dynamical Om diagnostic finds a preference for a dark energy model with equation of state w =-2/3, which correspond to a static domain wall network.

  3. Overtone Mobility Spectrometry: Part 4. OMS-OMS Analyses of Complex Mixtures

    Science.gov (United States)

    Kurulugama, Ruwan T.; Nachtigall, Fabiane M.; Valentine, Stephen J.; Clemmer, David E.

    2011-11-01

    A new, two-dimensional overtone mobility spectrometry (OMS-OMS) instrument is described for the analysis of complex peptide mixtures. OMS separations are based on the differences in mobilities of ions in the gas phase. The method utilizes multiple drift regions with modulated drift fields such that only ions with appropriate mobilities are transmitted to the detector. Here we describe a hybrid OMS-OMS combination that utilizes two independently operated OMS regions that are separated by an ion activation region. Mobility-selected ions from the first OMS region are exposed to energizing collisions and may undergo structural transitions before entering the second OMS region. This method generates additional peak capacity and allows for higher selectivity compared with the one-dimensional OMS method. We demonstrate the approach using a three-protein tryptic digest spiked with the peptide Substance P. The [M + 3H]3+ ion from Substance P can be completely isolated from other components in this complex mixture prior to introduction into the mass spectrometer.

  4. TEC MAX System. Operation and Maintenance Manual for the TEC Model 4005 MAX (Miniature Apparatus for X-Ray Diffraction System)

    Science.gov (United States)

    2005-03-31

    Model 4005) TEC has found that residual stress measurements can be made through thin layers of paint on steel surfaces (but not lead-based paints ...indicator lamp Operation and Maintenance Manual 5-11 TEC MAX System (Model 4005) 4005-OM-01 Revision 0, March 31, 2005 XRay Tube Status @ 0 20 40 60

  5. Theory and Observations of Plasma Waves Excited Space Shuttle OMS Burns in the Ionosphere

    Science.gov (United States)

    Bernhardt, P. A.; Pfaff, R. F.; Schuck, P. W.; Hunton, D. E.; Hairston, M. R.

    2010-12-01

    Measurements of artificial plasma turbulence were obtained during two Shuttle Exhaust Ionospheric Turbulence Experiments (SEITE) conducted during the flights of the Space Shuttle (STS-127 and STS-129). Based on computer modeling at the NRL PPD and Laboratory for Computational Physics & Fluid Dynamics (LCP), two dedicated burns of the Space Shuttle Orbital Maneuver Subsystem (OMS) engines were scheduled to produce 200 to 240 kg exhaust clouds that passed over the Air Force Research Laboratory (AFRL) Communications, Navigation, and Outage Forecast System (C/NOFS) satellite. This operation required the coordination by the DoD Space Test Program (STP), the NASA Flight Dynamics Officer (FDO), the C/NOFS payload operations, and the C/NOFS instrument principal investigators. The first SEITE mission used exhaust from a 12 Second OMS burn to deposit 1 Giga-Joules of energy into the upper atmosphere at a range of 230 km from C/NOFS. The burn was timed so C/NOFS could fly though the center of the exhaust cloud at a range of 87 km above the orbit of the Space Shuttle. The first SEITE experiment is important because is provided plume detection by ionospheric plasma and electric field probes for direct sampling of irregularities that can scatter radar signals. Three types of waves were detected by C/NOFS during and after the first SEITE burn. With the ignition and termination of the pair of OMS engines, whistler mode signals were recorded at C/NOFS. Six seconds after ignition, a large amplitude electromagnetic pulse reached the satellite. This has been identified as a fast magnetosonic wave propagating across magnetic field lines to reach the electric field (VEFI) sensors on the satellite. Thirty seconds after the burn, the exhaust cloud reach C/NOFS and engulfed the satellite providing very strong electric field turbulence along with enhancements in electron and ion densities. Kinetic modeling has been used to track the electric field turbulence to an unstable velocity

  6. An Analysis of the Effect of the Implementation of an Integrated Management System (IMS) on Work Ergonomics in an O&M Power Plant Company

    OpenAIRE

    Dewi Permata Ifadiana; Juli Soemirat

    2016-01-01

    Ergonomics has developed significantly for the prevention of related accidents. Its implementation, however, depends on the existing management system within a company. The integrated management system (IMS) is frequently implemented in industry, which is an integration of ISO 9001, ISO 14001, and OHSAS 18001. The objectives of this research were to analyze the effects of IMS implementation on work ergonomics and to find the influencing factors. The methods used were the 4x4 method for invest...

  7. Continuous system modeling

    Science.gov (United States)

    Cellier, Francois E.

    1991-01-01

    A comprehensive and systematic introduction is presented for the concepts associated with 'modeling', involving the transition from a physical system down to an abstract description of that system in the form of a set of differential and/or difference equations, and basing its treatment of modeling on the mathematics of dynamical systems. Attention is given to the principles of passive electrical circuit modeling, planar mechanical systems modeling, hierarchical modular modeling of continuous systems, and bond-graph modeling. Also discussed are modeling in equilibrium thermodynamics, population dynamics, and system dynamics, inductive reasoning, artificial neural networks, and automated model synthesis.

  8. Impact of EfOM size on competition in activated carbon adsorption of organic micro-pollutants from treated wastewater.

    Science.gov (United States)

    Zietzschmann, Frederik; Worch, Eckhard; Altmann, Johannes; Ruhl, Aki Sebastian; Sperlich, Alexander; Meinel, Felix; Jekel, Martin

    2014-11-15

    The competitive impacts of different fractions of wastewater treatment plant effluent organic matter (EfOM) on organic micro-pollutant (OMP) adsorption were investigated. The fractionation was accomplished using separation by nanofiltration (NF). The waters resulting from NF were additionally treated to obtain the same dissolved organic carbon (DOC) concentrations as the initial water. Using size exclusion chromatography (LC-OCD) it could be shown that the NF treatment resulted in an EfOM separation by size. Adsorption tests showed different competitive effects of the EfOM fractions with the OMP. While large EfOM compounds that were retained in NF demonstrated a reduced competition as compared to the raw water, the NF-permeating EfOM compounds showed an increased competition with the majority of the measured OMP. The effects of small size EfOM are particularly negative for OMP which are weak/moderate adsorbates. Adsorption analysis was carried out for the differently fractionized waters. The small sized EfOM contain better adsorbable compounds than the raw water while the large EfOM are less adsorbable. This explains the observed differences in the EfOM competitiveness. The equivalent background compound (EBC) model was applied to model competitive adsorption between OMP and EfOM and showed that the negative impacts of EfOM on OMP adsorption increase with decreasing size of the EfOM fractions. The results suggest that direct competition for adsorption sites on the internal surface of the activated carbon is more substantial than indirect competition due to pore access restriction by blockage. Another explication for reduced competition by large EfOM compounds could be the inability to enter and block the pores due to size exclusion.

  9. Lingvistik, dialogism, hermeneutik: Om språkvetenskapens kunskapsobjekt

    Directory of Open Access Journals (Sweden)

    Andreas Widoff

    2012-04-01

    Full Text Available En stor del av språkvetenskapen vilar sedan länge på en snäv idé om sitt kunskapsobjekt. Inställningen är nomotetisk och logocentrisk. Med språk avses ett regelbundet system. Fastän denna inställning mött mycket motstånd, har den väl i praktiken aldrig skakats i grunden. Denna undersökning försöker därför ännu en gång att presentera ett alternativt språkbegrepp. Teorin är dialogisk och hermeneutisk: den språkliga betydelsens plats i världen och tolkningen som grunden för all betydelse är vägledande principer. Genom dessa principer introduceras två begreppsliga ramverk. Det första lägger grunden för en kontinuerlig språkmodell som försöker att upplösa dikotomin mellan system och bruk. Till denna modell fogas sedan en tolkningstypologi. Denna har ett dubbelt syfte. Å ena sidan möjliggör den en systematisk jämförelse av språkvetenskapens discipliner. Å andra sidan är den en beskrivning av språkets betydelsestruktur.

  10. ISAL experiment documentation of vertical tail and OMS pods

    Science.gov (United States)

    1983-01-01

    Investigation of Space Transportation System (STS) Atmospheric Luminosities (ISAL) experiment documentation includes vertical tail and orbital maneuvering system (OMS) pods with surface glow against the blackness of space. This glowing scene was provided by a long duration exposure with a 35mm camera aimed toward the tail of the Earth-orbiting Challenger, Orbiter Vehicle (OV) 099. OV-099 was maneuvered to a 120-nautical-mile altitude and flown with open payload bay (PLB) in the velocity vector for the conducting of a test titled, 'Evaluation of Oxygen Interaction with Materials (EOIM)'. Atomic oxygen within the low orbital environment is known to be extremely reactive when in contact with solid surfaces. In the darkened area between the camera and the glowing OMS pods and vertical stabilizer are two trays of test materials.

  11. Om den sociale og symbolske funktion af uddannelsesevalueringer

    DEFF Research Database (Denmark)

    Nørholm, Morten

    Ph.d.-afhandlingen handler om evalueringer, om evalueringer af uddannelse med et fokus og perspektiv som er begrænset til en afdækning af forhold om evalueringer, til en formulering af en teori om evalueringer. I afhandlingens analyser og diskussioner anvendes teorier af Émile Durkheim, Pierre...

  12. Om den sociale og symbolske funktion af uddannelsesevalueringer

    DEFF Research Database (Denmark)

    Nørholm, Morten

    Ph.d.-afhandlingen handler om evalueringer, om evalueringer af uddannelse med et fokus og perspektiv som er begrænset til en afdækning af forhold om evalueringer, til en formulering af en teori om evalueringer. I afhandlingens analyser og diskussioner anvendes teorier af Émile Durkheim, Pierre...

  13. Opsigtsvækkende nyt om derivater fra USA

    DEFF Research Database (Denmark)

    Thinggaard, Frank

    1997-01-01

    Der er opsigsvækkende nyt fra USA om den regnskabsmæssige behandling af derivater som terminskontrakter, futures, optioner, swaps m.v. Glem alt om historiske anskaffelsespriser. For derivater er der kun ét mål, som kan bruges: markedsværdier (fair-values). Glem alt om snakken om 'off-balance-sheet...

  14. Ramme- og lokalaftaler om organisering af virksomheders sikkerheds- og sundhedsarbejde

    DEFF Research Database (Denmark)

    Sørensen, Ole Henning; Hasle, Peter

    En undersøgelse af ramme aftaler mellem arbejdsmarkedets parter om alternative organisering af sikkerhedsorganisationen, samt en række virksomheders lokale aftaler om samme emne.......En undersøgelse af ramme aftaler mellem arbejdsmarkedets parter om alternative organisering af sikkerhedsorganisationen, samt en række virksomheders lokale aftaler om samme emne....

  15. Design of operations management internships across organizations - learning OM by doing OM

    NARCIS (Netherlands)

    Wouters, Marc; van Donselaar, K.H.

    2000-01-01

    To teach operations management (OM), we had students work full time in companies, analyzing problems and developing solutions. Fifteen students worked in different companies but onrelated OM topics, and we created many opportunities for them to exchange knowledge, ideas, and experiences. We organize

  16. An Analysis of the Effect of the Implementation of an Integrated Management System (IMS on Work Ergonomics in an O&M Power Plant Company

    Directory of Open Access Journals (Sweden)

    Dewi Permata Ifadiana

    2016-05-01

    Full Text Available Ergonomics has developed significantly for the prevention of related accidents. Its implementation, however, depends on the existing management system within a company. The integrated management system (IMS is frequently implemented in industry, which is an integration of ISO 9001, ISO 14001, and OHSAS 18001. The objectives of this research were to analyze the effects of IMS implementation on work ergonomics and to find the influencing factors. The methods used were the 4x4 method for investigating accidents; interviews; and a questionnaire for workers and managers at an electricity company. The subjects were divided into three levels, namely: top management, middle management, and workers. Logistic regression was used to analyze and estimate the effects of one or more management variables on ergonomics related accidents. The results showed that the implementation of IMS has supported work ergonomics very well based on the average scores, which ranged from 2.99 to 3.38. The logistic regression showed that the most influential IMS on work ergonomics was the Do (D of Deming’s PDCA cycle, whereas the most influential parameter for ergonomics accident prevention was Policy (P and Do (D at the top management level.

  17. STS-26 Discovery, Orbiter Vehicle (OV) 103, OMS pod leak repair at KSC

    Science.gov (United States)

    1988-01-01

    At the Kennedy Space Center (KSC), Rockwell manufacturing engineering specialist Claude Willis (left) and Rockwell manufacturing supervisor George Gallagher begin installation of a 'clamshell' device in the left orbital maneuvering system (OMS) pod reaction control system (RCS) of Discovery, Orbiter Vehicle (OV) 103. Gallagher performed the OMS pod nitric acid oxidizer leak repair operation using the two newly cut access ports in the Orbiter's aft bulkhead.

  18. A Best Practice for Developing Availability Guarantee Language in Photovoltaic (PV) O&M Agreements.

    Energy Technology Data Exchange (ETDEWEB)

    Klise, Geoffrey Taylor [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Balfour, John [High Performance PV, Phoenix, AZ (United States)

    2015-11-01

    This document outlines the foundation for developing language that can be utilized in an Equipment Availability Guarantee, typically included in an O&M services agreement between a PV system or plant owner and an O&M services provider, or operator. Many of the current PV O&M service agreement Availability Guarantees are based on contracts used for traditional power generation, which create challenges for owners and operators due to the variable nature of grid-tied photovoltaic generating technologies. This report documents language used in early PV availability guarantees and presents best practices and equations that can be used to more openly communicate how the reliability of the PV system and plant equipment can be expressed in an availability guarantee. This work will improve the bankability of PV systems by providing greater transparency into the equipment reliability state to all parties involved in an O&M services contract.

  19. Review af arbejdsmarkedsstyrelsen survey om rekruttering

    DEFF Research Database (Denmark)

    Bach, Henning Bjerregaard; Milhøj, Anders

    Arbejdsmarkedsstyrelsen har bestilt konsulentfirmaet Rambøll Management til to gange årligt at gennemføre en survey om danske virksomheders rekruttering af medarbejdere. I dette review gennemgår og vurderer SFI surveyens design, herunder udformningen af spørgeskemaer og vejledninger, dataindsamli......Arbejdsmarkedsstyrelsen har bestilt konsulentfirmaet Rambøll Management til to gange årligt at gennemføre en survey om danske virksomheders rekruttering af medarbejdere. I dette review gennemgår og vurderer SFI surveyens design, herunder udformningen af spørgeskemaer og vejledninger...

  20. Corporate responsibility – det handler om redelighed

    DEFF Research Database (Denmark)

    Thomsen, Steen

    2009-01-01

    Virksomhedsansvar – corporate responsibility – kan blive et fællesbegreb for selskabsledelse, bæredygtighed og corporate social responsibility, der hver især drejer sig om forskellige former for bæredygtighed – finansiel, social og miljømæssig......Virksomhedsansvar – corporate responsibility – kan blive et fællesbegreb for selskabsledelse, bæredygtighed og corporate social responsibility, der hver især drejer sig om forskellige former for bæredygtighed – finansiel, social og miljømæssig...

  1. Thermochemical Modeling of the Uranium-Cerium-Oxygen System

    Energy Technology Data Exchange (ETDEWEB)

    Voit, Stewart L [ORNL; Besmann, Theodore M [ORNL

    2010-10-01

    The objective of the Fuel Cycle R&D Program, Advanced Fuels campaign is to provide the research and development necessary to develop low loss, high quality nuclear fuels for ultra-high burnup reactor operation. Primary work in this area will be focused on the ceramic and metallic fuel systems. The goal of the current work is to enhance the understanding of ceramic nuclear fuel thermochemistry to support fuel research and development efforts. The thermochemical behavior of oxide nuclear fuel under irradiation is dependent on the oxygen to metal ratio (O:M). In fluorite-structured fuel, the actinide metal cation is bonded with {approx}2 oxygen atoms on a crystal lattice and as the metal atoms fission, fission fragments and free oxygen are created. The resulting fission fragments will contain some oxide forming elements, however these are insufficient to bind to all the liberated oxygen and therefore, there is an average increase in O:M with fuel burnup. Some of the fission products also form species that will migrate to and react with the cladding surface in a phenomenon known as Fuel Clad Chemical Interaction (FCCI). Cladding corrosion is life-limiting so it is desirable to understand influencing factors, such as oxide thermochemistry, which can be used to guide the design and fabrication of higher burn up fuel. A phased oxide fuel thermochemical model development effort is underway within the Advanced Fuels Campaign. First models of binary oxide systems are developed. For nuclear fuel system this means U-O and transuranic systems such as Pu-O, Np-O and Am-O. Next, the binary systems will be combined to form pseudobinary systems such as U-Pu-O, etc. The model development effort requires the use of data to allow optimization based on known thermochemical parameters as a function of composition and temperature. Available data is mined from the literature and supplemented by experimental work as needed. Due to the difficulty of performing fuel fabrication development

  2. Niklas Luhmanns teori om samfundets kommunikationssystemer

    DEFF Research Database (Denmark)

    Harste, Gorm

    2009-01-01

    Artiklen gennemgår Luhmanns kommunikationsteori og rekonstruerer den ud fra Dirk Baeckers reformulering af teorien om distinktioner, koder og mening. Artiklen hæfter sig i særlig grad ved organisationssystemerne og deres betydning i den historiske udfoldelse af kommunikation som semantik. Artikle...

  3. En fortælling om AMU

    DEFF Research Database (Denmark)

    Pedersen, Villy Hovard; Andresen, Susanne; Lassen, Morten

    bedre muligheder for et aktivt arbejdsliv på et omskifteligt arbejdsmarked. Det er også historien om et skolesystem med nogle meget engage­rede medarbejdere og ledere, der igennem årene har arbejdet for at tilrettelægge og gennemføre uddannelser, der giver mening for både kursister og virksomheder. Og...

  4. Antologi om Visuelle Felt-& Analyse Metoder

    DEFF Research Database (Denmark)

    Lundberg, Pia

    andet baseret på det poetiske princip, af Edgar Allan Poe, som blev udgivet posthumt i 1850. Derudover anvendes antropologerne Victor Turner & Edward Bruners teoretiske arbejder om forskellige kulturæstetiske fænomener og udtryk (fx Bruner 1986). Sidst men ikke mindst anvendes de kulturvidenskabelige...

  5. Overleven: De strijd om het bestaan

    NARCIS (Netherlands)

    Oost, van der J.

    2011-01-01

    Biologische systemen (virussen, micro-organismen, hogere organismen) streven er naar om hun genetisch materiaal te vermeerderen. Dat is de basis van de natuurlijke evolutie, zo is het leven ontstaan en zo ontwikkelt het zich nog steeds. Echter, in alle natuurlijke ecosystemen zijn de essentiële comp

  6. En fortælling om AMU

    DEFF Research Database (Denmark)

    Pedersen, Villy Hovard; Andresen, Susanne; Lassen, Morten

    bedre muligheder for et aktivt arbejdsliv på et omskifteligt arbejdsmarked. Det er også historien om et skolesystem med nogle meget engage­rede medarbejdere og ledere, der igennem årene har arbejdet for at tilrettelægge og gennemføre uddannelser, der giver mening for både kursister og virksomheder. Og...

  7. Antologi om Visuelle Felt-& Analyse Metoder

    DEFF Research Database (Denmark)

    Lundberg, Pia

    andet baseret på det poetiske princip, af Edgar Allan Poe, som blev udgivet posthumt i 1850. Derudover anvendes antropologerne Victor Turner & Edward Bruners teoretiske arbejder om forskellige kulturæstetiske fænomener og udtryk (fx Bruner 1986). Sidst men ikke mindst anvendes de kulturvidenskabelige...

  8. OM-X®, Fermented Vegetables Extract Suppresses Antigen-Stimulated Degranulation in Rat Basophilic Leukemia RBL-2H3 Cells and Passive Cutaneous Anaphylaxis Reaction in Mice.

    Science.gov (United States)

    Itoh, Tomohiro; Miyake, Yasuyoshi; Kasashima, Takuya; Shimomiya, Yoshie; Nakamura, Yuki; Ando, Masashi; Tsukamasa, Yasuyuki; Takahata, Muneaki

    2015-09-01

    OM-X® is a hand-made and naturally manufactured probiotic supplement. This fermented food product is made from vegetables, fruits, seaweeds and mushrooms, using 12 strains of lactic acid bacteria and bifidobacteria. OM-X® is also known to have beneficial health properties, and some of its components show effects on antigen (Ag)-stimulated degranulation activity, indicating that OM-X® may be useful in the treatment of allergy responses and symptoms. In this study, we evaluated the inhibitory effects of OM-X® on Ag-stimulated degranulation in rat basophilic leukemia RBL-2H3 cells, clarified the underlying mechanisms, and determined the active compounds in OM-X® for suppression of degranulation. Treatment with OM-X® gradually suppressed Ag-stimulated degranulation throughout the maturation period. OM-X® also gradually produced melanoidins by lactic acid bacterial fermentation during the maturation process. There was a high correlation between the suppression levels of Ag-stimulated degranulation and the browning of OM-X®. Furthermore, the inhibition of Ag-stimulated degranulation by OM-X® was found to be partially due to the direct inactivation of NADPH oxidase. To elucidate the in vivo effects of OM- X®, type I allergy model mice were orally administered with OM-X®, and the passive cutaneous anaphylaxis (PCA) reaction was measured. OM-X® intake remarkably suppressed the PCA reaction. Taken together, our findings suggest that OMX® could be a beneficial food to ameliorate allergic reactions.

  9. OMS, OM(η2-SO), and OM(η2-SO)(η2-SO2) molecules (M = Ti, Zr, Hf): infrared spectra and density functional calculations.

    Science.gov (United States)

    Liu, Xing; Wang, Xuefeng; Wang, Qiang; Andrews, Lester

    2012-07-02

    Infrared spectra of the matrix isolated OMS, OM(η(2)-SO), and OM(η(2)-SO)(η(2)-SO(2)) (M = Ti, Zr, Hf) molecules were observed following laser-ablated metal atom reactions with SO(2) during condensation in solid argon and neon. The assignments for the major vibrational modes were confirmed by appropriate S(18)O(2) and (34)SO(2) isotopic shifts, and density functional vibrational frequency calculations (B3LYP and BPW91). Bonding in the initial OM(η(2)-SO) reaction products and in the OM(η(2)-SO)(η(2)-SO(2)) adduct molecules with unusual chiral structures is discussed.

  10. Temperature & wood source control PyOM turnover in a Northern American forest

    Science.gov (United States)

    Hatton, Pierre-Joseph; Le Moine, James; Auclerc, Apolline; Gormley, Mark; Filley, Tim R.; Nadelhoffer, Knute J.; Bird, Jeff. A.

    2016-04-01

    Surprisingly little is known about how pyrolysis temperature and wood source affect the stability of forest-fire derived pyrogenic organic matter (PyOM). Here, we show that wood source and temperature affect in situ mineralization rates of PyOM in soils for two co-occurring gymnosperm (jack pine; JP [Pinus banksiana]) and angiosperm (red maple; RM [Acer rubrum])¬ species from North American boreal-temperate ecotones. We assess the effect of pyrolysis temperature on PyOM fates by following the decay of 13C/15N-enriched JP wood (JPwood) and PyOM produced at 300 °C (JP300) and 450 °C (JP450); and assess the effect of PyOM wood source by comparing fates of JP450 and RM450. JPwood mineralized 18× faster than JP300 and 44× faster than JP450 after 2.8y. RM450 mineralized initially faster than JP450 during the first ~2y, but became equivalent afterwards (1.1±0.2% of CO¬2 losses after 2.8y). Modeled turnover times suggest that this can be attributed to ~1% of fast-cycling PyOM (wood source (yet); N recoveries did not differ. PLFA-(13)C data reveal that (i) treatments have similar microbial communities after 1y, (ii) JPwood is preferentially utilized by fungi, and (iii) bacteria increasingly utilize PyOM as pyrolysis temperature increases. Estimated carbon use efficiency decreased with increasing pyrolysis temperature (JPwood~JP300>JP450~RM450). Although insignificant, potential phenol oxidase and peroxidase activities decrease with increasing pyrolysis temperature. Neither PyOM nor wood additions (~11% of soil C stock 0-20 cm depth) affected pH or Ec after 1y. We provide the first, field experimental evidence that pyrolysis temperature and wood source affect the turnover of PyOM in soil. We show faster, initial decay for PyOM produced at lesser temperature and RM (angiosperm) compared with JP (gymnosperm). This study offers realistic insights on (i) the controls underlying in situ PyOM turnover, and on (ii) how ongoing/projected changes in tree species composition

  11. Hva handler menighetsutvikling egentlig om?

    Directory of Open Access Journals (Sweden)

    Lars Råmunddal

    2015-11-01

    Full Text Available This article aims to provide an academic founded answer to the question why it is imperative that con-siderations concerning church development should be grounded on a holistic ecclesiological thinking – and not only on the attempt to develop one or a selective range of church developing factors. The model (Fig. 1 serves both as a starting point for classifying four different approaches to church devel-opment thinking and practice, and as theoretical basis for a critical theological assessment of the cur-rent approaches to church development. Thus, the assessment is made in light of what Fig.1 calls the church’s double context and two dimensions, and it shows that all the four approaches captures im-portant ecclesiological and strategic issues concerning church development – but it also shows that the strength of each approach is their weakness too – namely one-sidedness. In light of a holistic ecclesio-logical thinking, each approach can be judged as reductionist, since they all restrict the congregation’s potential for development to a specific part of church life. The last part of the article argues for the importance of developing the church: a both as a Spirit-made, unique entity and a «real» human com-munity, and b as simultaneously biblically and historically rooted and culturally relevant. One main standpoint defended here is that the church’s theological dimension must never be detached from the sociological context – and vice versa. If this happens, it may have serious consequences – not only for views on the organization and management of the church, but also for the spiritual character of the church. Regarding the question of how one can conceive a congregation in the sense b above, the article argues for what might be called a normative-contextual approach. This implies that the church always must relate itself to contemporary culture – and at the same time must show resistance to ele-ments in contemporary

  12. Ultra-Wideband Optical Modulation Spectrometer (OMS) Development

    Science.gov (United States)

    Gardner, Jonathan (Technical Monitor); Tolls, Volker

    2004-01-01

    The optical modulation spectrometer (OMS) is a novel, highly efficient, low mass backend for heterodyne receiver systems. Current and future heterodyne receiver systems operating at frequencies up to a few THz require broadband spectrometer backends to achieve spectral resolutions of R approximately 10(exp 5) to 10(exp 6) to carry out many important astronomical investigations. Among these are observations of broad emission and absorption lines from extra-galactic objects at high redshifts, spectral line surveys, and observations of planetary atmospheres. Many of these lines are pressure or velocity broadened with either large half-widths or line wings extending over several GHz. Current backend systems can cover the needed bandwidth only by combining the output of several spectrometers, each with typically up to 1 GHz bandwidth, or by combining several frequency-shifted spectra taken with a single spectrometer. An ultra-wideband optical modulation spectrometer with 10 - 40 GHz bandwidth will enable broadband ob- servations without the limitations and disadvantages of hybrid spectrometers. Spectrometers like the OMS will be important for both ground-based observatories and future space missions like the Single Aperture Far-Infrared Telescope (SAFIR) which might carry IR/submm array heterodyne receiver systems requiring a spectrometer for each array pixel. Small size, low mass and small power consumption are extremely important for space missions. This report summarizes the specifications developed for the OMS and lists already identified commercial parts. The report starts with a review of the principle of operation, then describes the most important components and their specifications which were derived from theory, and finishes with a conclusion and outlook.

  13. Modelling Railway Interlocking Systems

    DEFF Research Database (Denmark)

    Lindegaard, Morten Peter; Viuf, P.; Haxthausen, Anne Elisabeth

    2000-01-01

    In this report we present a model of interlocking systems, and describe how the model may be validated by simulation. Station topologies are modelled by graphs in which the nodes denote track segments, and the edges denote connectivity for train traÆc. Points and signals are modelled by annotatio...

  14. MAPP-konference om brugerdrevet innovation

    DEFF Research Database (Denmark)

    Stacey, Julia

    2005-01-01

    Er fødevareinnovation kun et spørgsmål om ny teknologi? Nej - for ny teknologi skal anvendes i produkter, som matcher markedets behov. Fødevarevirksomheder kan også være innovative bare ved at bruge kendt teknologi på nye måder, hvis produktet rammer de rigtige nicher på markedet. Innovationen er...

  15. Drømmen om transfaglighed

    DEFF Research Database (Denmark)

    Henriksen, Carsten

    2013-01-01

    Fagene er under pres. Tidens krav om grænseløse kompetencer truer med at rive faggrænserne ned for at slå porten op til transfaglighedens forjættede land. Men der findes ingen genvej bagom fagene, for selvom fagene er kunstige grænser i en grænseløs, moderne verden, kan vi ikke undvære dem. Hans ...

  16. Psykologiske teorier om intelligens og folkeskolens elevdifferentiering

    DEFF Research Database (Denmark)

    Bendixen, Carsten

    Afhandlingen er en historisk analyse af, hvordan teorier og metoder om intelligens er blevet transformeret til folkeskolens hverdagspraksis. I tre historiske perioder vises det, hvordan begrundelser for anvendelsen af henholdsvis skolepsykologiens intelligenstestning, Piagets forståelse af barnets...... fra 1930’erne frem til i dag. Introduktionen af såvel Piagets som Howard Gardners teorier er sket igennem en modstilling til skolepsykologiens intelligenstestning. Der foretages vurderinger og drages konklusioner over intelligensteoriens og intelligenstestningens rolle i folkeskolen. Dette...

  17. Teorier om læring

    DEFF Research Database (Denmark)

    Det er en fornøjelse at præsentere Teorier om læring - en læringspsykologisk antologi. Den store interesse for læringsbegrebet i dag understreger behovet for en udgivelse, der præsenterer nogle af de mest centrale teorier på området i en kort og overskuelig form. Bogen præsenterer derfor en række...

  18. Om: One tool for many (Indian) languages

    Institute of Scientific and Technical Information of China (English)

    GANAPATHIRAJU Madhavi; BALAKRISHNAN Mini; BALAKRISHNAN N.; REDDY Raj

    2005-01-01

    Many different languages are spoken in India, each language being the mother tongue of tens of millions of people.While the languages and scripts are distinct from each other, the grammar and the alphabet are similar to a large extent. One common feature is that all the Indian languages are phonetic in nature. In this paper we describe the development of a translit eration scheme Om which exploits this phonetic nature of the alphabet. Om uses ASCⅡ characters to represent Indian language alphabets, and thus can be read directly in English, by a large number of users who cannot read script in other Indian languages than their mother tongue. It is also useful in computer applications where local language tools such as email and chat are not yet available. Another significant contribution presented in this paper is the development of a text editor for Indian languages that integrates the Om input for many Indian languages into a word processor such as Microsoft WinWord(R). The text editor is also developed on Java(R) platform that can run on Unix machines as well. We propose this transliteration scheme as a possible standard for Indian language transliteration and keyboard entry.

  19. Johannes Sløk - historien om en undtagelse

    DEFF Research Database (Denmark)

    Liisberg, Sune

    2006-01-01

    bliver således til historien om en guddommeligt berettiget undtagelse - eller historien om en 'idiot' (en privatmand, et individ) kunne man også sige med slet skjult reference til Sartres filosofiske værk om Gustave Flaubert, L'Idiot de la famille. Andre for artiklen centrale tænkere er Kierkegaard og...

  20. Johannes Sløk - historien om en undtagelse

    DEFF Research Database (Denmark)

    Liisberg, Sune

    2006-01-01

    bliver således til historien om en guddommeligt berettiget undtagelse - eller historien om en 'idiot' (en privatmand, et individ) kunne man også sige med slet skjult reference til Sartres filosofiske værk om Gustave Flaubert, L'Idiot de la famille. Andre for artiklen centrale tænkere er Kierkegaard og...

  1. The O&M Personnel Shortage and University Training Programs.

    Science.gov (United States)

    Wiener, William R.; Joffee, Elga

    1993-01-01

    Measures taken during the 1980s to increase the number of orientation and mobility (O&M) specialists to work with persons with visual impairments were evaluated, by means of a telephone survey of 15 university O&M programs. Survey findings indicated that efforts to address critical shortages in O&M personnel have been effective. (DB)

  2. Entropy of Reissner-Nordstr\\"om-de Sitter black hole

    CERN Document Server

    Zhang, Li-Chun; Ma, Meng-Sen

    2016-01-01

    Based on the consideration that the black hole horizon and the cosmological horizon of Reissner-Nordstr\\"om black hole in de Sitter space are not independent each other, we conjecture the total entropy of the system should have an extra term contributed from the entanglement between the two horizons, except for the sum of the two horizon entropies. Making use of the globally effective first law and the effective thermodynamic quantities, we derive the total entropy and find that it will diverge as the two horizons tends to coincide.

  3. Solar PV O&M Standards and Best Practices - Existing Gaps and Improvement Efforts

    Energy Technology Data Exchange (ETDEWEB)

    Klise, Geoffrey Taylor [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Balfour, John R. [High Performance PV, Phoenix, AZ (United States); Keating, T. J. [SunSpec Alliance, San Jose, CA (United States)

    2014-11-01

    As greater numbers of photovoltaic (PV) systems are being installed, operations & maintenance (O&M) activities will need to be performed to ensure the PV system is operating as designed over its useful lifetime. To mitigate risks to PV system availability and performance, standardized procedures for O&M activities are needed to ensure high reliability and long-term system bankability. Efforts are just getting underway to address the need for standard O&M procedures as PV gains a larger share of U.S. generation capacity. Due to the existing landscape of how and where PV is installed, including distributed generation from small and medium PV systems, as well as large, centralized utility-scale PV, O&M activities will require different levels of expertise and reporting, making standards even more important. This report summarizes recent efforts made by solar industry stakeholders to identify the existing standards and best practices applied to solar PV O&M activities, and determine the gaps that have yet to be, or are currently being addressed by industry.

  4. Solar PV O&M Standards and Best Practices – Existing Gaps and Improvement Efforts

    Energy Technology Data Exchange (ETDEWEB)

    Klise, Geoffrey Taylor [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Balfour, John R. [High Performance PV, Phoenix, AZ (United States); Keating, T. J. [SunSpec Alliance, San Jose, CA (United States)

    2014-11-01

    As greater numbers of photovoltaic (PV) systems are being installed, operations & maintenance (O&M) activities will need to be performed to ensure the PV system is operating as designed over its useful lifetime. To mitigate risks to PV system availability and performance, standardized procedures for O&M activities are needed to ensure high reliability and long-term system bankability. Efforts are just getting underway to address the need for standard O&M procedures as PV gains a larger share of U.S. generation capacity. Due to the existing landscape of how and where PV is installed, including distributed generation from small and medium PV systems, as well as large, centralized utility-scale PV, O&M activities will require different levels of expertise and reporting, making standards even more important. This report summarizes recent efforts made by solar industry stakeholders to identify the existing standards and best practices applied to solar PV O&M activities, and determine the gaps that have yet to be, or are currently being addressed by industry.

  5. Numerical Modeling of Thermal EOR: Comprehensive Coupling of an AMR-Based Model of Thermal Fluid Flow and Geomechanics Modélisation numérique d’EOR thermique : couplage complet entre un modèle d’écoulement thermique basé sur une discrétisation adaptative et la géomécanique

    Directory of Open Access Journals (Sweden)

    Guy N.

    2013-02-01

    Full Text Available Modeling Steam Assisted Gravity Drainage (SAGD can involve significant CPU (Central Processing Unit time when both thermal fluid flow and geomechanics are coupled in order to take into account variations of permeability and porosity inside the reservoir due to stress changes. Here, a numerical procedure that performs thermo-hydro-mechanical simulations, in an efficient way, is presented. This procedure relies on an iterative coupling between a thermal reservoir simulator based on a finite volume method and a geomechanical one based on a finite element method. A strong feature of this procedure is that it allows handling the case when the reservoir simulations are performed using Adaptive Mesh Refinements (AMR. It thus provides an accurate description of the steam front evolution and allows taking geomechanical effects into account without performing the geomechanical simulations on a refined mesh. The efficiency of this coupling procedure is illustrated on a synthetic but realistic SAGD test case. La modélisation du procédé SAGD (Steam Assisted Gravity Drainage peut impliquer un temps de calcul important lorsque l’écoulement thermique et la géomécanique sont couplés pour tenir compte des variations de perméabilité et de porosité à l’intérieur du réservoir induites par l’évolution des contraintes. Une procédure numérique qui effectue des simulations thermo-hydro-mécaniques, d’une manière efficace, est présentée. Cette procédure repose sur un processus de couplage itératif entre un simulateur réservoir thermique basé sur la méthode des volumes finis et un simulateur géomécanique basé sur une discrétisation par éléments finis. Une caractéristique forte de cette procédure est qu’elle permet de traiter des cas où les simulations de réservoir sont réalisées en utilisant un raffinement de maillage adaptatif. Elle fournit ainsi une description précise de l’évolution du front de vapeur d’eau et permet

  6. Seabed Filter Feasibility Study of Om Almisk Island

    KAUST Repository

    Sesler, Kathryn

    2012-06-01

    Freshwater access has always been and is continuing to be a severe problem in desert coastal regions, despite the fact that they have an unlimited supply of easily accessible saline water. Water desalination plants are well established and heavily relied upon throughout the Middle East, Saudi Arabia in particular. However, water desalination tends to be a very expensive and energy intensive solution to the problem. The transition from using open water intake systems and all of the pretreatment processes that they require, to using seabed water filters as an intake, would potentially reduce the lifetime costs, energy consumption, and environmental impacts commonly associated with water desalination. This is because the filtration process that the seabed filter generates, serves as sufficient pretreatment for seawater as well as eliminating any risk of entrainment or impingement of marine organisms. The main objective of this research is to conduct a feasibility study on Om Almisk Island, an island off the coast of King Abdullah University of Science and Technology (KAUST), to determine if it would be a suitable location to construct a seabed water filter as a replacement for the current open water intake. The Om Almisk Island site was evaluated through collection of sand samples over a radial grid around Om Almisk Island and sample analysis using grain size distribution, porosity, and hydraulic conductivity. The lack of mud, high hydraulic conductivity, proximity to KAUST, and the shallow waters of the sandy apron surrounding Om Almisk Island make this an ideal location for a seabed water filter to be used as an intake and pretreatment for the KAUST desalination plant. This location also has low tide change and the presence of benthic macrofauna to create bioturbation in the sediments, which could inhibit the growth of a schmutzdecke. If this biological layer forms, it could drastically reduce the hydraulic conductivity of the system. Due to the high hydraulic

  7. Selected System Models

    Science.gov (United States)

    Schmidt-Eisenlohr, F.; Puñal, O.; Klagges, K.; Kirsche, M.

    Apart from the general issue of modeling the channel, the PHY and the MAC of wireless networks, there are specific modeling assumptions that are considered for different systems. In this chapter we consider three specific wireless standards and highlight modeling options for them. These are IEEE 802.11 (as example for wireless local area networks), IEEE 802.16 (as example for wireless metropolitan networks) and IEEE 802.15 (as example for body area networks). Each section on these three systems discusses also at the end a set of model implementations that are available today.

  8. Modeling cellular systems

    CERN Document Server

    Matthäus, Franziska; Pahle, Jürgen

    2017-01-01

    This contributed volume comprises research articles and reviews on topics connected to the mathematical modeling of cellular systems. These contributions cover signaling pathways, stochastic effects, cell motility and mechanics, pattern formation processes, as well as multi-scale approaches. All authors attended the workshop on "Modeling Cellular Systems" which took place in Heidelberg in October 2014. The target audience primarily comprises researchers and experts in the field, but the book may also be beneficial for graduate students.

  9. Multiscale Cloud System Modeling

    Science.gov (United States)

    Tao, Wei-Kuo; Moncrieff, Mitchell W.

    2009-01-01

    The central theme of this paper is to describe how cloud system resolving models (CRMs) of grid spacing approximately 1 km have been applied to various important problems in atmospheric science across a wide range of spatial and temporal scales and how these applications relate to other modeling approaches. A long-standing problem concerns the representation of organized precipitating convective cloud systems in weather and climate models. Since CRMs resolve the mesoscale to large scales of motion (i.e., 10 km to global) they explicitly address the cloud system problem. By explicitly representing organized convection, CRMs bypass restrictive assumptions associated with convective parameterization such as the scale gap between cumulus and large-scale motion. Dynamical models provide insight into the physical mechanisms involved with scale interaction and convective organization. Multiscale CRMs simulate convective cloud systems in computational domains up to global and have been applied in place of contemporary convective parameterizations in global models. Multiscale CRMs pose a new challenge for model validation, which is met in an integrated approach involving CRMs, operational prediction systems, observational measurements, and dynamical models in a new international project: the Year of Tropical Convection, which has an emphasis on organized tropical convection and its global effects.

  10. Dynamic Systems Modeling

    Directory of Open Access Journals (Sweden)

    Sorin Dan ŞANDOR

    2003-01-01

    Full Text Available System Dynamics was introduced by Jay W. Forrester in the 1960s. Since then the methodology was adopted in many areas of natural or social sciences. This article tries to present briefly how this methodology works, both as Systems Thinking and as Modelling with Vensim computer software.

  11. Om digital dannelse og digitale kompetencer

    DEFF Research Database (Denmark)

    Hansen, Thomas Illum

    2016-01-01

    argumenterer for, hvilke digitale kompetencer eleverne må udvikle i forhold til digital dannelse, mens det næste henter eksempler fra en amerikansk kontekst på, hvordan integration af it ikke i sig selv fører til omfattende ændringer i undervisningspraksis. Herefter følger fire kapitler, der retter sig direkte......I de forenklede Fælles Mål fra 2014 har fire tværgående temaer fået særlig opmærksomhed med en selvstændig vejledning samt ved at være integreret i målene og omtalt i læseplanen for de enkelte fag. Omdrejningspunktet for bogen It-didaktik i teori og praksis elevpositioner og digitale kompetencer i......, Aarhus Universitet, som professor i fagdidaktik og it med særligt henblik på dansk. Jeppe har deltaget i en lang række forskningsprojekter om it i undervisningen, og han rådgiver jævnligt ministerier og kommuner om it i undervisningen, ligesom han har bidraget til udviklingen af flere digitale læremidler...

  12. Innledningsartikkel til temanummer om Barn og rom

    Directory of Open Access Journals (Sweden)

    Ellen Beate Sandseter

    2015-07-01

    Full Text Available I lys av utviklingen av barnehagens posisjon i det norske samfunnet og debatten om effekter av barnehagens fysiske miljø og organisering, dannet en gruppe tverrfaglige og tverrinstitusjonelle barnehageforskere i 2004 forskningsnettverket Barn og Rom. Nettverkets mål har vært å "skape ny og forskningsbasert kunnskap om det fysiske miljøets betydning for barn, og samtidig være et forum for kunnskapsdeling, utvikling av felles forskningsprosjekter, formidling og publisering, samt internasjonalt samarbeid med andre aktører og forskningsgrupper". Forskningsnettverket opererer med en definisjon av "Barn og Rom" som i vid forstand omfatter hele det fysiske miljøet barn vokser opp i. Dette inkluderer ulike landskap, for eksempel byen og naturen, steder, bygninger, ute- og innerom, innredning, møbler, utstyr, installasjoner og lekeapparater. Likevel har nettverket hatt et særlig fokus på barnehagens fysiske miljø og dets betydning for barn, personalet og den pedagogiske virksomheten og hvordan miljøet forstås, organiseres, skapes og endres av personalet og barn i barnehagen. Dette temanummeret er et resultat av noen av nettverksmedlemmenes arbeid de siste årene og presenterer en stor bredde både i metodisk tilnærming så vel som tematisk tilnærming til temaet "Barn og rom".

  13. Modeling Sustainable Food Systems

    Science.gov (United States)

    Allen, Thomas; Prosperi, Paolo

    2016-05-01

    The processes underlying environmental, economic, and social unsustainability derive in part from the food system. Building sustainable food systems has become a predominating endeavor aiming to redirect our food systems and policies towards better-adjusted goals and improved societal welfare. Food systems are complex social-ecological systems involving multiple interactions between human and natural components. Policy needs to encourage public perception of humanity and nature as interdependent and interacting. The systemic nature of these interdependencies and interactions calls for systems approaches and integrated assessment tools. Identifying and modeling the intrinsic properties of the food system that will ensure its essential outcomes are maintained or enhanced over time and across generations, will help organizations and governmental institutions to track progress towards sustainability, and set policies that encourage positive transformations. This paper proposes a conceptual model that articulates crucial vulnerability and resilience factors to global environmental and socio-economic changes, postulating specific food and nutrition security issues as priority outcomes of food systems. By acknowledging the systemic nature of sustainability, this approach allows consideration of causal factor dynamics. In a stepwise approach, a logical application is schematized for three Mediterranean countries, namely Spain, France, and Italy.

  14. Dynamical formation of a Reissner-Nordstr\\"om black hole with scalar hair in a cavity

    CERN Document Server

    Sanchis-Gual, Nicolas; Herdeiro, Carlos; Font, José A; Montero, Pedro J

    2016-01-01

    In a recent letter, we presented numerical relativity simulations, solving the full Einstein--Maxwell--Klein-Gordon equations, of superradiantly unstable Reissner-Nordstr\\"om black holes (BHs), enclosed in a cavity. Low frequency, spherical perturbations of a charged scalar field, trigger this instability. The system's evolution was followed into the non-linear regime, until it relaxed into an equilibrium configuration, found to be a $\\textit{hairy}$ BH: a charged horizon in equilibrium with a scalar field condensate, whose phase is oscillating at the (final) critical frequency. Here, we investigate the impact of adding self-interactions to the scalar field. In particular, we find sufficiently large self-interactions suppress the exponential growth phase, known from linear theory, and promote a non-monotonic behaviour of the scalar field energy. Furthermore, we discuss in detail the influence of the various parameters in this model: the initial BH charge, the initial scalar perturbation, the scalar field char...

  15. Data i stakkevis om døde grise

    DEFF Research Database (Denmark)

    Serup, Tove; Rangstrup-Christensen, Lena

    2015-01-01

    Eksperter er i gang med at samle data fra 6000 faringer og 4000 obduktioner af døde pattegrise. Det gælder om at klarlægge hvornår i diegivningsperioden pattegrisene dør, og hvad de dør af. Der er tale om den hidtil største datamængde i Danmark om emnet.......Eksperter er i gang med at samle data fra 6000 faringer og 4000 obduktioner af døde pattegrise. Det gælder om at klarlægge hvornår i diegivningsperioden pattegrisene dør, og hvad de dør af. Der er tale om den hidtil største datamængde i Danmark om emnet....

  16. Glow experiment documentation of OMS/RCS pod and vertical stabilizer

    Science.gov (United States)

    1982-01-01

    Glow experiment documentation of one of the orbital maneuvering system (OMS) reaction control system (RCS) pods and a portion of the vertical stabilizer shows chemoluminescent effectresulting from atomic oxygen impacting the spacecraft and building to the point that the atomic oxygen atoms combine to form molecules of oxygen. The Image Intensifier on NIKON 35mm camera was used to record the glow.

  17. Modeling Complex Systems

    CERN Document Server

    Boccara, Nino

    2010-01-01

    Modeling Complex Systems, 2nd Edition, explores the process of modeling complex systems, providing examples from such diverse fields as ecology, epidemiology, sociology, seismology, and economics. It illustrates how models of complex systems are built and provides indispensable mathematical tools for studying their dynamics. This vital introductory text is useful for advanced undergraduate students in various scientific disciplines, and serves as an important reference book for graduate students and young researchers. This enhanced second edition includes: . -recent research results and bibliographic references -extra footnotes which provide biographical information on cited scientists who have made significant contributions to the field -new and improved worked-out examples to aid a student’s comprehension of the content -exercises to challenge the reader and complement the material Nino Boccara is also the author of Essentials of Mathematica: With Applications to Mathematics and Physics (Springer, 2007).

  18. Distributed generation systems model

    Energy Technology Data Exchange (ETDEWEB)

    Barklund, C.R.

    1994-12-31

    A slide presentation is given on a distributed generation systems model developed at the Idaho National Engineering Laboratory, and its application to a situation within the Idaho Power Company`s service territory. The objectives of the work were to develop a screening model for distributed generation alternatives, to develop a better understanding of distributed generation as a utility resource, and to further INEL`s understanding of utility concerns in implementing technological change.

  19. Modeling the earth system

    Energy Technology Data Exchange (ETDEWEB)

    Ojima, D. [ed.

    1992-12-31

    The 1990 Global Change Institute (GCI) on Earth System Modeling is the third of a series organized by the Office for Interdisciplinary Earth Studies to look in depth at particular issues critical to developing a better understanding of the earth system. The 1990 GCI on Earth System Modeling was organized around three themes: defining critical gaps in the knowledge of the earth system, developing simplified working models, and validating comprehensive system models. This book is divided into three sections that reflect these themes. Each section begins with a set of background papers offering a brief tutorial on the subject, followed by working group reports developed during the institute. These reports summarize the joint ideas and recommendations of the participants and bring to bear the interdisciplinary perspective that imbued the institute. Since the conclusion of the 1990 Global Change Institute, research programs, nationally and internationally, have moved forward to implement a number of the recommendations made at the institute, and many of the participants have maintained collegial interactions to develop research projects addressing the needs identified during the two weeks in Snowmass.

  20. Stop den tåbelige talkrig om flygtningejob

    DEFF Research Database (Denmark)

    Post, Bettina

    2015-01-01

    valgkampen er nær og politikerne slås om, hvorvidt nytilkomne skal arbejde 10 eller 37 timer om ugen fra dag ét. Men kan vi ikke først få at vide, hvor jobbene skal komme fra?......valgkampen er nær og politikerne slås om, hvorvidt nytilkomne skal arbejde 10 eller 37 timer om ugen fra dag ét. Men kan vi ikke først få at vide, hvor jobbene skal komme fra?...

  1. Klima, apokalypse og en topos om sted

    DEFF Research Database (Denmark)

    Nielsen, Esben Bjerggaard

    2013-01-01

    Klimadebatten er fuld af forudsigelser om fremtiden og lurende katastrofe. Al Gore har eksempelvis gjort brug af en apokalyptisk fortælling i sin klimaretorik. Tid er en vigtig topos i denne type retorik. Forfatteren viser her, hvordan skiftet til en topos om Sted forandrer den klassiske apokalyp......Klimadebatten er fuld af forudsigelser om fremtiden og lurende katastrofe. Al Gore har eksempelvis gjort brug af en apokalyptisk fortælling i sin klimaretorik. Tid er en vigtig topos i denne type retorik. Forfatteren viser her, hvordan skiftet til en topos om Sted forandrer den klassiske...

  2. Meditation on OM: Relevance from ancient texts and contemporary science

    Directory of Open Access Journals (Sweden)

    Kumar Sanjay

    2010-01-01

    Full Text Available Background: In Indian scriptures the sacred syllable Om is the primordial sound from which all other sounds and creation emerge which signifies the Supreme Power. Aims: To explore the significance of the syllable OM from ancient texts and effects of OM meditation in contemporary science. Descriptions from ancient texts: The descriptions of Om have been taken from four Upanisads (Mundaka, Mandukya, Svetasvatara, and Katha, the Bhagvad Gita, and Patanjali′s Yoga Sutras. Scientific studies on Om: Autonomic and respiratory studies suggest that there is a combination of mental alertness with physiological rest during the practice of Om meditation. Evoked potentials studies suggest a decrease in sensory transmission time at the level of the auditory association cortices, along with recruitment of more neurons at mesencephalic-diencephalic levels. Conclusion: It is considered that a person who realizes Om, merges with the Absolute. Scientific studies on Om suggest that the mental repetition of Om results in physiological alertness, and increased sensitivity to sensory transmission.

  3. Kan Batman dateres? Om massekommunikasjonen som kulturhistorie

    Directory of Open Access Journals (Sweden)

    Hans Frederik Dahl

    1990-08-01

    Full Text Available Hans Frederik Dahls artikel er et bud på om massekommunikationen kan tænkes ind i kulturhistorien.Første halvdel af artiklen fremhæver de prob- lemer, det rejser, når massekommunikation med dens karakteristika i form af serialitet, triviatitet og internationalitet skal reflekteres i forhold til en kulturhistorisk tradition, som normalt tænker i begreber som tidsånd, kunstnerisk originalitet og nationalt særpræg. Sidste halvdel focuserer på tre centrale aspekter ved massekommunikationen, som også er af- gørende for dens kulturhistorie: dens nære forbindelse til musikken, dens internationale karakter og dens konstante tilbagevenden til tidligere pro- dukter.

  4. Bayesian Networks as a Decision Tool for O&M of Offshore Wind Turbines

    DEFF Research Database (Denmark)

    Nielsen, Jannie Jessen; Sørensen, John Dalsgaard

    2010-01-01

    Costs to operation and maintenance (O&M) of offshore wind turbines are large. This paper presents how influence diagrams can be used to assist in rational decision making for O&M. An influence diagram is a graphical representation of a decision tree based on Bayesian Networks. Bayesian Networks...... offer efficient Bayesian updating of a damage model when imperfect information from inspections/monitoring is available. The extension to an influence diagram offers the calculation of expected utilities for decision alternatives, and can be used to find the optimal strategy among different alternatives...

  5. Infoteket om funktionshinder : Information om funktionshinder som vägen till empowerment

    OpenAIRE

    Akne, Eva

    2012-01-01

    The aim of this master’s thesis is to investigate a information center called ”Infoteket om funktionshinder”. The purpose of Infoteket is to collect information about disabilities and make it accessible to people with disabilities, their relatives and public. In this survey I will analyze how Infoteket can help people with disabilities to achieve empowerment. I use empowerment as a theoretical framework as Jay A. Conger and Rabindra N. Kanungo describes it in terms of sense of control and sel...

  6. Asymptotic Reissner-Nordstr\\"om solution within nonlinear electrodynamics

    CERN Document Server

    Kruglov, S I

    2016-01-01

    A model of nonlinear electrodynamics coupled with the gravitational field is studied. We obtain the asymptotic black hole solutions at $r\\rightarrow 0$ and $r\\rightarrow \\infty$. The asymptotic at $r\\rightarrow 0$ is shown, and we find corrections to the Reissner-Nordstr\\"om solution and Coulomb's law at $r\\rightarrow\\infty$. The mass of the black hole is evaluated having the electromagnetic origin. We investigate the thermodynamics of charged black holes and their thermal stability. The critical point corresponding to the second-order phase transition (where heat capacity diverges) is found. If the mass of the black hole is greater than the critical mass, the black hole becomes unstable.

  7. Mechanical Systems, Classical Models

    CERN Document Server

    Teodorescu, Petre P

    2009-01-01

    This third volume completes the Work Mechanical Systems, Classical Models. The first two volumes dealt with particle dynamics and with discrete and continuous mechanical systems. The present volume studies analytical mechanics. Topics like Lagrangian and Hamiltonian mechanics, the Hamilton-Jacobi method, and a study of systems with separate variables are thoroughly discussed. Also included are variational principles and canonical transformations, integral invariants and exterior differential calculus, and particular attention is given to non-holonomic mechanical systems. The author explains in detail all important aspects of the science of mechanics, regarded as a natural science, and shows how they are useful in understanding important natural phenomena and solving problems of interest in applied and engineering sciences. Professor Teodorescu has spent more than fifty years as a Professor of Mechanics at the University of Bucharest and this book relies on the extensive literature on the subject as well as th...

  8. NEP systems model

    Science.gov (United States)

    George, Jeffrey A.

    A new nuclear electric propulsion (NEP) systems analysis code is discussed. The new code is modular and consists of a driver code and various subsystem models. The code models five different subsystems: (1) reactor/shield; (2) power conversion; (3) heat rejection; (4) power management and distribution (PMAD); and (5) thrusters. The code optimizes for the following design criteria: minimum mass; minimum radiator area; and low mass/low area. The code also optimizes the following parameters: separation distance; temperature ratio; pressure ratio; and transmission frequency. The discussion is presented in vugraph form.

  9. Huisartsen motiveren om samen te werken met bedrijfsartsen

    NARCIS (Netherlands)

    Heuvel, F.M.M. van den; Buijs, P.C.; Putten, D.J. van

    2003-01-01

    De stuurgroep van het ZonMw-Deskundigheidsbevorderingsproject ‘Leren samenwerken bij Sociaal Medische Begeleiding’ heeft TNO Arbeid gevraagd om een beknopt, kwalitatief onderzoek uit te voeren naar wat huisartsen kan motiveren om aandacht te besteden aan samenwerking met bedrijfsartsen. In dit kader

  10. Om afstanden mellem EU-systemet og dets borgere

    DEFF Research Database (Denmark)

    Nielsen, Peter Heyn

    2016-01-01

    Artiklen diskuterer EU's demokratiske opbygning i forlængelse af debatten om EU-skepsis, der senest opstod som følge af Brexit-afstemningen.......Artiklen diskuterer EU's demokratiske opbygning i forlængelse af debatten om EU-skepsis, der senest opstod som følge af Brexit-afstemningen....

  11. Et undervisningsforløb om uddannelse i postkoloniale selvbiografier

    DEFF Research Database (Denmark)

    Rasch, Astrid

    2015-01-01

    Denne artikel udspringer af et ph.d.-projekt om selvbiografier, som er skrevet efter opløsningen af det britiske imperium. I dette projekt undersøger jeg samspillet mellem individuel og kollektiv erindring og ser på, hvordan erindringer om imperiet bliver påvirket af afkoloniseringen og den postk...

  12. Huisartsen motiveren om samen te werken met bedrijfsartsen

    NARCIS (Netherlands)

    Heuvel, F.M.M. van den; Buijs, P.C.; Putten, D.J. van

    2003-01-01

    De stuurgroep van het ZonMw-Deskundigheidsbevorderingsproject ‘Leren samenwerken bij Sociaal Medische Begeleiding’ heeft TNO Arbeid gevraagd om een beknopt, kwalitatief onderzoek uit te voeren naar wat huisartsen kan motiveren om aandacht te besteden aan samenwerking met bedrijfsartsen. In dit kader

  13. To udviklings-projekter om beton og arkitektur

    DEFF Research Database (Denmark)

    Manelius, Anne-Mette

    2009-01-01

    Artikel om to udviklingsprojekter på Teknologisk Institut med fokus på cnc-fræsede støbeforme til beton: Unika Beton og TailorCrete......Artikel om to udviklingsprojekter på Teknologisk Institut med fokus på cnc-fræsede støbeforme til beton: Unika Beton og TailorCrete...

  14. Status quo for partier - tvivl om S-styrke

    DEFF Research Database (Denmark)

    Thomsen, Søren Risbjerg

    2007-01-01

    ANALYSE: Selv om snittet af martsmålingerne akkurat flytter ét mandat fra S til V, hæfter Altingets valgforsker sig ved stabiliteten. Udgivelsesdato: 9. april 2007......ANALYSE: Selv om snittet af martsmålingerne akkurat flytter ét mandat fra S til V, hæfter Altingets valgforsker sig ved stabiliteten. Udgivelsesdato: 9. april 2007...

  15. National Energy Modeling System

    Energy Technology Data Exchange (ETDEWEB)

    Skinner, C.W. (Energy Information Administration, Washington, DC (United States))

    1993-01-01

    The Energy Information Administration is developing a new National Energy Modeling System to provide annual forecasts of energy supply, demand, and prices on a regional basis in the United States and, to a limited extent, in the rest of the world. The design for the system was based on a requirements analysis, a comparison of requirements with existing modeling capabilities, and a series of widely circulated issue papers defining the choices and tradeoffs for 13 key design decisions. An initial prototpye of the new NEMS was implemented in late 1992, with a more complete, operational version in 1993. NEMS is expected to provide EIA and other users with a greatly enhanced ability to illustrate quickly and effectively the effects of a wide range of energy policy proposals.

  16. Modeling Novo Nordisk Production Systems

    DEFF Research Database (Denmark)

    Miller, Thomas Dedenroth

    1997-01-01

    This report describes attributes of models and systems, and how models can be used for description of production systems. There are special attention on the 'Theory of Domains'.......This report describes attributes of models and systems, and how models can be used for description of production systems. There are special attention on the 'Theory of Domains'....

  17. Om medier og terror i 'Mad City'

    DEFF Research Database (Denmark)

    Carstensen, Martin B.

    2010-01-01

    Populærkulturens spillefilm er meget mere end blot underholdning. I denne bog demonstrerer 10 yngre forskere, hvordan en række udvalgte spillefilm kan tjene som ramme om en analyse og diskussion af væsentlige spørgsmål relateret til terror og terrorbekæmpelse: Hvad er præventiv krig, og hvilke...... medierne og terroristerne - se Mad City! Filmmediet fungerer som en form for eksperimentarium i forhold til komplicerede moralske og politiske spørgsmål. Derfor kan film anvendes som en pædagogisk løftestang i forståelsen og diskussionen af mulige løsninger på udfordringerne for nutidens samfund. Terror og...... film åbner for en anderledes og sjovere måde at lære på - og dermed for en mere varieret og inspirerende undervisning i fx gymnasiet. Ved at tage udgangspunkt i, hvad vi allerede ved fra timerne foran lærredet eller skærmen, men måske ikke har begreber for, letter bogen forståelsen af, hvad terror er...

  18. Selective hydrogenation of halogenated arenes using porous manganese oxide (OMS-2) and platinum supported OMS-2 catalysts.

    Science.gov (United States)

    McManus, Iain J; Daly, Helen; Manyar, Haresh G; Taylor, S F Rebecca; Thompson, Jillian M; Hardacre, Christopher

    2016-07-04

    Porous manganese oxide (OMS-2) and platinum supported on OMS-2 catalysts have been shown to facilitate the hydrogenation of the nitro group in chloronitrobenzene to give chloroaniline with no dehalogenation. Complete conversion was obtained within 2 h at 25 °C and, although the rate of reaction increased with increasing temperature up to 100 °C, the selectivity to chloroaniline remained at 99.0%. Use of Pd/OMS-2 or Pt/Al2O3 resulted in significant dechlorination even at 25 °C and 2 bar hydrogen pressure giving a selectivity to chloroaniline of 34.5% and 77.8%, respectively, at complete conversion. This demonstrates the potential of using platinum group metal free catalysts for the selective hydrogenation of halogenated aromatics. Two pathways were observed for the analogous nitrobenzene hydrogenation depending on the catalyst used. The hydrogenation of nitrobenzene was found to follow a direct pathway to aniline and nitrosobenzene over Pd/OMS-2 in contrast to the OMS and Pt/OMS-2 catalysts which resulted in formation of nitrosobenzene, azoxybenzene and azobenzene/hydrazobenzene intermediates before complete conversion to aniline. These results indicate that for Pt/OMS-2 the hydrogenation proceeds predominantly over the support with the metal acting to dissociate hydrogen. In the case of Pd/OMS-2 both the hydrogenation and hydrogen adsorption occur on the metal sites.

  19. OM14 is a mitochondrial receptor for cytosolic ribosomes that supports co-translational import into mitochondria.

    Science.gov (United States)

    Lesnik, Chen; Cohen, Yifat; Atir-Lande, Avigail; Schuldiner, Maya; Arava, Yoav

    2014-12-09

    It is well established that import of proteins into mitochondria can occur after their complete synthesis by cytosolic ribosomes. Recently, an additional model was revived, proposing that some proteins are imported co-translationally. This model entails association of ribosomes with the mitochondrial outer membrane, shown to be mediated through the ribosome-associated chaperone nascent chain-associated complex (NAC). However, the mitochondrial receptor of this complex is unknown. Here, we identify the Saccharomyces cerevisiae outer membrane protein OM14 as a receptor for NAC. OM14Δ mitochondria have significantly lower amounts of associated NAC and ribosomes, and ribosomes from NAC[Δ] cells have reduced levels of associated OM14. Importantly, mitochondrial import assays reveal a significant decrease in import efficiency into OM14Δ mitochondria, and OM14-dependent import necessitates NAC. Our results identify OM14 as the first mitochondrial receptor for ribosome-associated NAC and reveal its importance for import. These results provide a strong support for an additional, co-translational mode of import into mitochondria.

  20. DESIGNING, MODELLING AND OPTIMISING OF AN INTEGRATED RELIABILITY REDUNDANT SYSTEM

    Directory of Open Access Journals (Sweden)

    G. Sankaraiah

    2012-01-01

    Full Text Available

    ENGLISH ABSTRACT: The reliability of a system is generally treated as a function of cost; but in many real-life situations reliability will depend on a variety of factors. It is therefore interesting to probe the hidden impact of constraints apart from cost – such as weight, volume, and space. This paper attempts to study the impact of multiple constraints on system reliability. For the purposes of analysis, an integrated redundant reliability system is considered, modelled and solved by applying a Lagrangian multiplier that gives a real valued solution for the number of components, for its reliability at each stage, and for the system. The problem is further studied by using a heuristic algorithm and an integer programming method, and is validated by sensitivity analysis to present an integer solution.

    AFRIKAANSE OPSOMMING: Die betroubaarheid van ‘n sisteem word normaalweg as ‘n funksie van koste beskou, alhoewel dit in baie gevalle afhang van ‘n verskeidenheid faktore. Dit is dus interessant om die verskuilde impak van randvoorwaardes soos massa, volume en ruimte te ondersoek. Hierdie artikel poog om die impak van meervoudige randvoorwaardes op sisteem-betroubaarheid te bestudeer. Vir die ontleding, word ‘n geïntegreerde betroubaarheid-sisteem met oortolligheid beskou, gemodelleer en opgelos aan die hand van ‘n Lagrange-vermenigvuldiger. Die problem word verder bestudeer deur gebruik te maak van ‘n heuristiese algoritme en heeltalprogrammering asook gevalideer by wyse van ‘n sensitiwiteitsanalise sodat ‘n heeltaloplossing voorgehou kan word.

  1. System of systems modeling and analysis.

    Energy Technology Data Exchange (ETDEWEB)

    Campbell, James E.; Anderson, Dennis James; Longsine, Dennis E. (Intera, Inc., Austin, TX); Shirah, Donald N.

    2005-01-01

    This report documents the results of an LDRD program entitled 'System of Systems Modeling and Analysis' that was conducted during FY 2003 and FY 2004. Systems that themselves consist of multiple systems (referred to here as System of Systems or SoS) introduce a level of complexity to systems performance analysis and optimization that is not readily addressable by existing capabilities. The objective of the 'System of Systems Modeling and Analysis' project was to develop an integrated modeling and simulation environment that addresses the complex SoS modeling and analysis needs. The approach to meeting this objective involved two key efforts. First, a static analysis approach, called state modeling, has been developed that is useful for analyzing the average performance of systems over defined use conditions. The state modeling capability supports analysis and optimization of multiple systems and multiple performance measures or measures of effectiveness. The second effort involves time simulation which represents every system in the simulation using an encapsulated state model (State Model Object or SMO). The time simulation can analyze any number of systems including cross-platform dependencies and a detailed treatment of the logistics required to support the systems in a defined mission.

  2. Results of investigations with an 0.015-scale model (49-0) of the Rockwell International space shuttle vehicle 140A/B configuration with modified OMS pods and elevons in the AEDC VKF tunnel B (0A79)

    Science.gov (United States)

    Esparza, V.; Lindsay, A. I.

    1975-01-01

    Aerodynamic data obtained from wind tunnel tests of an 0.015-scale space shuttle vehicle Orbiter model of a 140A/B configuration with modified orbital manuevering system pods and elevons are documented. Force data was obtained at various control surface settings and Reynolds numbers in the angle of attack range of 15 deg to 45 deg and at angles of sideslip of -5 deg to +5 deg. Control surface variables included elevon, rudder, speed brake, and body flap configurations.

  3. View of the starboard OMS pod of the STS-6 Challenger

    Science.gov (United States)

    1983-01-01

    This view centers on the starboard orbital maneuvering system (OMS) pod of the shuttle Challenger during its STS-6 mission. Two pieces of thermal protection system tile appear to have loosened. The view also shows one of the cargo bay television cameras, part of the extravehicular activity (EVA) slide wire system, three handrails and other features on the aft bulkhead. Part of the airborne support equipment (ASE) is in the lower right foreground.

  4. Ny ph.d.-afhandling om fald og faldforebyggelse

    DEFF Research Database (Denmark)

    Evron, Lotte

    2015-01-01

    Lotte Evron forsvarede d. 18. Marts 2015 sin ph.d.-afhandling: Egenomsorg som selvteknologi i multifaktoriel faldforebyggelse – et feltstudie med diskursanalyse på Institut for Kommunikation, Aalborg Universitet. Undersøgelsen studerer egenomsorg som styringsteknologi i et bestemt multifaktoriel ...... underviser og forsker på Professionshøjskolen Metropol og holder gerne foredrag om sin forskning. Desuden blogger hun om fald og faldforebyggelse på Faldnørden: https://sygeplejerskelotte.wordpress.com og tweeter om sygepleje på: https://twitter.com/sygeplejerskele...

  5. LHCb: Evaluation of 400m, 5Gbit Versatile Link lengths over OM3 and OM4 fibres for the LHCb upgrade

    CERN Multimedia

    Schwemmer, R; Neufeld, N; Soos, C; Troska, J; Wyllie, K

    2013-01-01

    The LHCb experiment will upgrade its DAQ system to a trigger less, 40MHz read-out after LS2. To be able to process the approximately 40Tbit/s of data we will require a massive computing farm. This computing farm can not be installed underground, in the vicinity of the detector anymore due to the enormous power and cooling requirements. An affordable data transport solution has to be found to carry the data from the detector to the new data center on the surface. The distance to cover is estimated to be between 300 and 400 meters. We evaluated the feasibility of using the 5Gbit/s Versatile Link to cover the full distance over OM3 and OM4 quality fibres and will present our results.

  6. Effects of effluent organic matter (EfOM) on the removal of emerging contaminants by ozonation.

    Science.gov (United States)

    Cai, Ming-Jhih; Lin, Yi-Pin

    2016-05-01

    Removal of emerging contaminants in wastewater treatment is essential to ensure the ecological health of the receiving water bodies. Ozonation is a promising technology to achieve this purpose but important wastewater characteristics affecting the optimal removal efficiency need to be elucidated. Secondary effluents contain effluent organic matter (EfOM), which can react directly with ozone as well as react as the initiator, promoter and inhibitor in the hydroxyl radical (.OH) chain reactions resulting from ozone decomposition. These different reaction modes of EfOM, coupled with alkalinity and pH value, collectively determine the ozone and .OH exposures and the degradation of pharmaceutical compounds by ozonation. In this study, we determined the rate constants of EfOM collected from two municipal wastewater treatment plants in terms of direct ozone reaction, initiation, promotion and inhibition at various pH values (pH 6.0-7.5) and temperatures (10-30 °C). The rate constants of direct reaction and initiation generally increased with the increasing pH value while the rate constants of promotion and inhibition did not vary significantly. All rate constants increased with the increasing temperature. The removal of ibuprofen, acetylsulfamethoxazole and metoprolol in diluted secondary effluent by ozonation can be fairly-well modeled by using the determined rate constants of EfOM.

  7. Evaluation of Local Ensemble Transform Kalman Filter System for the Global FSU Atmospheric Model

    Science.gov (United States)

    Cintra, R. S.; Cocke, S.

    2014-12-01

    This paper shows the results of a implementation of the data assimilation system to obtain the initial condition to the atmospheric general circulation model (AGCM) for the Florida State University/USA. The better quality of forecasts is given the more accurate the estimate of the initial conditions. The process of combining observations and short-range forecast to obtain an analysis is called data assimilation. The data assimilation system called "Local ensemble transform Kalman filter (LETKF) is implemented. A prediction estimates ensemble in state space represents the model errors in that scheme. The LETKF is tested with the AGCM Florida State University Global Spectral Model (FSUGSM). The model is a multilevel (27 vertical levels) spectral primitive equation model with a vertical σ-coordinate. All variables are expanded horizontally in a truncated series of spherical harmonic functions (at resolution T63) and a transform technique is applied to calculate the physical processes in real space. The LETKF data assimilation experiments are based in two types of the synthetic observations data (surface pressure, absolute temperature, zonal component wind, meridional component wind and humidity) to evaluate the LETKF system for FSUGSM. The data assimilation experiments are based on observational systems simulation experiments where the "nature" is assumed to be known, and adding random noise to the nature run. The first experiment, the "nature" fields are the FSUGSM forecasts without data assimilation, afterwards, we use the "National Centers for Environment Prediction" reanalysis to obtain the "nature" fields. The observations are localized at every other grid point of the model. The forecast ensemble size is 20 members. The numerical experiments have a one-month assimilation cycle, for the period 01/01/2001 to 31/01/2001 at (00, 06, 12 and 18 GMT) for each day. We compare the behavior of the model by comparing with its forecast, observations and nature fields. A

  8. MARVEL om de effecten van IGP in kaart te brengen

    NARCIS (Netherlands)

    Hengst-Bruggeling, M. den; Heesmans, S.; Graaf, H.A.L.M. de

    2010-01-01

    Informatiegestuurde politie betekent dat op basis van actuele en betrouwbare informatie en analyses, rationele keuzes worden gemaakt, waardoor mensen en middelen optimaal kunnen worden ingezet en de bedrijfsdoelen worden bereikt. Een belangrijke reden om informatiegestuurde politie (IGP) te

  9. O&M of services infrastructure by social franchising partnerships

    CSIR Research Space (South Africa)

    Wall, K

    2012-09-01

    Full Text Available -1 International Water Association (IWA) Conference, South Korea, September 2012 O&M of services infrastructure by social franchising partnerships Wall, Kevin*, Bhagwan, Jay**, Ive, Oliver***, Kirwan, Frank**** * CSIR Built Environment, P.O. Box 395...

  10. Om forskning og kreative miljøer i Danmark

    DEFF Research Database (Denmark)

    Rehfeld, Jens F.

    Zeneca, Sony Ericsson, ST-Ericsson, Sony Mobile, SAAB, Volvo, Gambro osv. Krisen tvingar politikerna att agera. För dem är det en ryggmärgsreflex att lösa problem genom att skjuta till pengar. Men i det här fallet handlar det egentligen inte om brist på pengar, det handlar mer om att använda pengarna på rätt...

  11. Om børsretlig misbrug af intern viden

    DEFF Research Database (Denmark)

    Werlauff, Erik; Schaumburg-Müller, Peer

    2010-01-01

    Artiklen analyserer med afsæt i betænkning nr. 1521/2010 om insiderhandel en række centrale spørgsmål om misbrug af intern viden i børs- og kapitalmarkedsretten. Artiklen underkaster nogle af de centrale spørgsmål i betænkningen, herunder vedrørende formodningsreglen og misbrugsreservationen, en...

  12. ECO-BIOLOGICAL SYSTEM MODELING

    Directory of Open Access Journals (Sweden)

    T. I. Burak

    2015-01-01

    Full Text Available The methodology for computer modeling of complex eco-biological models is presented in this paper. It is based on system approach of J. Forrester. Developed methodology is universal for complex ecological and biological systems. Modeling algorithm considers specialties of eco-biological systems and shows adequate and accurate results in practice. 

  13. Adjuvant treatment with the bacterial lysate (OM-85) improves management of atopic dermatitis: A randomized study

    Science.gov (United States)

    Bodemer, Christine; Guillet, Gerard; Cambazard, Frederic; Boralevi, Franck; Ballarini, Stefania; Milliet, Christian; Bertuccio, Paola; La Vecchia, Carlo; Bach, Jean-François; de Prost, Yves

    2017-01-01

    Background Environmental factors play a major role on atopic dermatitis (AD) which shows a constant rise in prevalence in western countries over the last decades. The Hygiene Hypothesis suggesting an inverse relationship between incidence of infections and the increase in atopic diseases in these countries, is one of the working hypothesis proposed to explain this trend. Objective This study tested the efficacy and safety of oral administration of the bacterial lysate OM-85 (Broncho-Vaxom®, Broncho-Munal®, Ommunal®, Paxoral®, Vaxoral®), in the treatment of established AD in children. Methods Children aged 6 months to 7 years, with confirmed AD diagnosis, were randomized in a double-blind, placebo-controlled trial to receive, in addition to conventional treatment with emollients and topical corticosteroids, 3.5mg of the bacterial extract OM-85 or placebo daily for 9 months. The primary end-point was the difference between groups in the occurrence of new flares (NF) during the study period, evaluated by Hazard Ratio (HR) derived from conditional Cox proportional hazard regression models accounting for repeated events. Results Among the 179 randomized children, 170 were analysed, 88 in the OM-85 and 82 in the placebo group. As expected most children in both treatment groups experienced at least 1 NF during the study period (75 (85%) patients in the OM-85 group and 72 (88%) in the placebo group). Patients treated with OM-85 as adjuvant therapy had significantly fewer and delayed NFs (HR of repeated flares = 0.80; 95% confidence interval (CI): 0.67–0.96), also when potential confounding factors, as family history of atopy and corticosteroids use, were taken into account (HR = 0.82; 95% CI: 0.69–0.98). No major side effect was reported, with comparable and good tolerability for OM-85 and placebo. Conclusions Results show an adjuvant therapeutic effect of a well standardized bacterial lysate OM-85 on established AD. PMID:28333952

  14. The Use of Management Control Systems and Operations Management Techniques

    Directory of Open Access Journals (Sweden)

    Edelcio Koitiro Nisiyama

    2016-01-01

    Full Text Available It is well known that both management control systems (MCSs and operations management (OM are related to firm performance; however, an integrated st udy that involves MCS and OM within the context of firm performance is still lacking. This research aimed to examine the relationships among the use of MCSs and OM techniques and firm performance in the Brazilian auto parts industry. Simons’ levers of cont rol framework was used to characterise the uses of MCSs, and OM techniques, such as total quality management (TQM and continuous improvement programmes, were adopted. The results obtained through the structural equation modelling indicated that the diagno stic use of MCSs is positively associated with the goals of cost reduction. In addition, the interactive use of MCSs is positively associated with the objectives of introducing new products, which is consistent with previous research. Additionally, OM tech niques are positively related to cost reduction but have no direct relationship with the introduction of new products.

  15. Mathematical System Theory and System Modeling

    OpenAIRE

    1980-01-01

    Choosing models related effectively to the questions to be addressed is a central issue in the craft of systems analysis. Since the mathematical description the analyst chooses constrains the types of issues he candeal with, it is important for these models to be selected so as to yield limitations that are acceptable in view of the questions the systems analysis seeks to answer. In this paper, the author gives an overview of the central issues affecting the question of model choice. To ...

  16. STS-46 Atlantis', OV-104's, vertical tail and OMS pods lit up by RCS jet firing

    Science.gov (United States)

    1992-01-01

    STS-46 Atlantis', Orbiter Vehicle (OV) 104's, vertical tail and orbital maneuvering system (OMS) pods are highlighted by the glow of the reaction control system (RCS) jet firings. OV-104 was at an altitude of 128 nautical miles. The remote manipulator system (RMS) arm is partially visible stowed along the port side sill longeron.

  17. Loop Quantum effects on Om-diagnostic and its Cosmological Implications

    CERN Document Server

    Rudra, Prabir

    2014-01-01

    In this paper we study the Loop quantum effects on the \\textit{Om} diagnostic and subsequently on the universe. We reconstruct the \\textit{Om} diagnostic in the background of Loop quantum gravity and then study the behaviour of various Chaplygin gas dark energy models using the modified diagnostic in a comparative scenario. The trajectories discriminate the various dark energy models from each other both in the Einstein gravity as well as Loop quantum gravity. The Loop quantum effects are also clearly noticeable from the trajectories in past, present and future universe. We see that the Loop quantum deviations are highly pronounced in the early universe, but alleviates as we tend towards the present universe and continue to decay in future. Thus it puts a big question on the effectiveness and consequently the suitability of loop quantum cosmology to explain the future universe.

  18. Model Reduction of Hybrid Systems

    DEFF Research Database (Denmark)

    Shaker, Hamid Reza

    systems are derived in this thesis. The results are used for output feedback control of switched nonlinear systems. Model reduction of piecewise affine systems is also studied in this thesis. The proposed method is based on the reduction of linear subsystems inside the polytopes. The methods which......High-Technological solutions of today are characterized by complex dynamical models. A lot of these models have inherent hybrid/switching structure. Hybrid/switched systems are powerful models for distributed embedded systems design where discrete controls are applied to continuous processes...... of hybrid systems, designing controllers and implementations is very high so that the use of these models is limited in applications where the size of the state space is large. To cope with complexity, model reduction is a powerful technique. This thesis presents methods for model reduction and stability...

  19. Modelling on fuzzy control systems

    Institute of Scientific and Technical Information of China (English)

    LI; Hongxing(李洪兴); WANG; Jiayin(王加银); MIAO; Zhihong(苗志宏)

    2002-01-01

    A kind of modelling method for fuzzy control systems is first proposed here, which is calledmodelling method based on fuzzy inference (MMFI). It should be regarded as the third modelling method thatis different from two well-known modelling methods, that is, the first modelling method, mechanism modellingmethod (MMM), and the second modelling method, system identification modelling method (SlMM). Thismethod can, based on the interpolation mechanism on fuzzy logic system, transfer a group of fuzzy inferencerules describing a practice system into a kind of nonlinear differential equation with variable coefficients, calledHX equations, so that the mathematical model of the system can be obtained. This means that we solve thedifficult problem of how to get a model represented as differential equations on a complicated or fuzzy controlsystem.

  20. Thermodynamic Geodesics of a Reissner Nordstr\\"om Black Hole

    CERN Document Server

    Farrugia, Christine

    2016-01-01

    Starting from a Geometrothermodynamics metric for the space of thermodynamic equilibrium states in the mass representation, we use numerical techniques to analyse the thermodynamic geodesics of a supermassive Reissner Nordstr\\"om black hole in isolation. Appropriate constraints are obtained by taking into account the processes of Hawking radiation and Schwinger pair-production. We model the black hole in line with the work of Hiscock and Weems. It can be deduced that the relation which the geodesics establish between the entropy $S$ and electric charge $Q$ of the black hole extremises changes in the black hole's mass. Indeed, at any given point along a geodesic, the value of $\\text{d}S/\\text{d}Q$ is of the same order of magnitude as the rate at which entropy changes with charge during a constant-mass perturbation. Our claim is further justified by the fact that the expression for the entropy of an extremal black hole is an exact solution to the geodesic equation.

  1. Energy System Modeling with REopt

    Energy Technology Data Exchange (ETDEWEB)

    Simpkins, Travis; Anderson, Kate; Cutler, Dylan; Olis, Dan; Elgqvist, Emma; DiOrio, Nick; Walker, Andy

    2016-07-15

    This poster details how REopt - NREL's software modeling platform for energy systems integration and optimization - can help to model energy systems. Some benefits of modeling with REopt include optimizing behind the meter storage for cost and resiliency, optimizing lab testing, optimizing dispatch of utility scale storage, and quantifying renewable energy impact on outage survivability.

  2. Decentralizing decision making in modularization strategies: Overcoming barriers from dysfunctional accounting systems

    DEFF Research Database (Denmark)

    Israelsen, Poul; Jørgensen, Brian

    2011-01-01

    Research on product modularity is dominated by an operations management (OM) perspective, through which numerous models to predict optimal modularization strategies have been developed. However, we argue that implementation of these predictions is hampered by prevailing project accounting systems...

  3. New insights into the structure of Om Ali-Thelepte basin, central Tunisia, inferred from gravity data: Hydrogeological implications

    Science.gov (United States)

    Harchi, Mongi; Gabtni, Hakim; El Mejri, Hatem; Dassi, Lassaad; Mammou, Abdallah Ben

    2016-08-01

    This work presents new results from gravity data analyses and interpretation within the Om Ali-Thelepte (OAT) basin, central Tunisia. It focuses on the hydrogeological implication, using several qualitative and quantitative techniques such as horizontal gradient, upward continuation and Euler deconvolution on boreholes log data, seismic reflection data and electrical conductivity measurements. The structures highlighted using the filtering techniques suggest that the Miocene aquifer of OAT basin is cut by four major fault systems that trend E-W, NE-SW, NW-SE and NNE-SSW. In addition, a NW-SE gravity model established shows the geometry of the Miocene sandstone reservoir and the Upper Cretaceous limestone rocks. Moreover, the superimposition of the electrical conductivity and the structural maps indicates that the low conductivity values of sampled water from boreholes are located around main faults.

  4. Modeling soft interface dominated systems

    NARCIS (Netherlands)

    Lamorgese, A.; Mauri, R.; Sagis, L.M.C.

    2017-01-01

    The two main continuum frameworks used for modeling the dynamics of soft multiphase systems are the Gibbs dividing surface model, and the diffuse interface model. In the former the interface is modeled as a two dimensional surface, and excess properties such as a surface density, or surface energy

  5. Validation of systems biology models

    NARCIS (Netherlands)

    Hasdemir, D.

    2015-01-01

    The paradigm shift from qualitative to quantitative analysis of biological systems brought a substantial number of modeling approaches to the stage of molecular biology research. These include but certainly are not limited to nonlinear kinetic models, static network models and models obtained by the

  6. Modeling of deterministic chaotic systems

    Energy Technology Data Exchange (ETDEWEB)

    Lai, Y. [Department of Physics and Astronomy and Department of Mathematics, The University of Kansas, Lawrence, Kansas 66045 (United States); Grebogi, C. [Institute for Plasma Research, University of Maryland, College Park, Maryland 20742 (United States); Grebogi, C.; Kurths, J. [Department of Physics and Astrophysics, Universitaet Potsdam, Postfach 601553, D-14415 Potsdam (Germany)

    1999-03-01

    The success of deterministic modeling of a physical system relies on whether the solution of the model would approximate the dynamics of the actual system. When the system is chaotic, situations can arise where periodic orbits embedded in the chaotic set have distinct number of unstable directions and, as a consequence, no model of the system produces reasonably long trajectories that are realized by nature. We argue and present physical examples indicating that, in such a case, though the model is deterministic and low dimensional, statistical quantities can still be reliably computed. {copyright} {ital 1999} {ital The American Physical Society}

  7. Modelling of wastewater systems

    DEFF Research Database (Denmark)

    Bechmann, Henrik

    In this thesis, models of pollution fluxes in the inlet to 2 Danish wastewater treatment plants (WWTPs) as well as of suspended solids (SS) concentrations in the aeration tanks of an alternating WWTP and in the effluent from the aeration tanks are developed. The latter model is furthermore used...

  8. Modelling Epistemic Systems

    CERN Document Server

    Martins, Andre C R

    2012-01-01

    In this Chapter, I will explore the use of modeling in order to understand how Science works. I will discuss the modeling of scientific communities, providing a general, non-comprehensive overview of existing models, with a focus on the use of the tools of Agent-Based Modeling and Opinion Dynamics. A special attention will be paid to models inspired by a Bayesian formalism of Opinion Dynamics. The objective of this exploration is to better understand the effect that different conditions might have on the reliability of the opinions of a scientific community. We will see that, by using artificial worlds as exploring grounds, we can prevent some epistemological problems with the definition of truth and obtain insights on the conditions that might cause the quest for more reliable knowledge to fail.

  9. From Numeric Models to Granular System Modeling

    Directory of Open Access Journals (Sweden)

    Witold Pedrycz

    2015-03-01

    To make this study self-contained, we briefly recall the key concepts of granular computing and demonstrate how this conceptual framework and its algorithmic fundamentals give rise to granular models. We discuss several representative formal setups used in describing and processing information granules including fuzzy sets, rough sets, and interval calculus. Key architectures of models dwell upon relationships among information granules. We demonstrate how information granularity and its optimization can be regarded as an important design asset to be exploited in system modeling and giving rise to granular models. With this regard, an important category of rule-based models along with their granular enrichments is studied in detail.

  10. 20 CFR 229.52 - Age reduction when a reduced age O/M is effective before DIB O/M.

    Science.gov (United States)

    2010-04-01

    ... 20 Employees' Benefits 1 2010-04-01 2010-04-01 false Age reduction when a reduced age O/M is effective before DIB O/M. 229.52 Section 229.52 Employees' Benefits RAILROAD RETIREMENT BOARD REGULATIONS... Minimum Rate § 229.52 Age reduction when a reduced age O/M is effective before DIB O/M. If an...

  11. Den chipløse man og andre noveller om sex, magt og informationsteknologi

    DEFF Research Database (Denmark)

    Strøm, Georg

    Disse noveller handler om hvad du kan vente dig de næste ti år, og om de mennesker som skaber rammerne for din tilværelse. Hvis du tror, der er tale om nørder som sidder alene og hamrer løs på en computer, mens de drikker cola og spiser kold pizza, må du tro om igen. Der er tale om mænd og kvinder...

  12. Pluralistic Modeling of Complex Systems

    CERN Document Server

    Helbing, Dirk

    2010-01-01

    The modeling of complex systems such as ecological or socio-economic systems can be very challenging. Although various modeling approaches exist, they are generally not compatible and mutually consistent, and empirical data often do not allow one to decide what model is the right one, the best one, or most appropriate one. Moreover, as the recent financial and economic crisis shows, relying on a single, idealized model can be very costly. This contribution tries to shed new light on problems that arise when complex systems are modeled. While the arguments can be transferred to many different systems, the related scientific challenges are illustrated for social, economic, and traffic systems. The contribution discusses issues that are sometimes overlooked and tries to overcome some frequent misunderstandings and controversies of the past. At the same time, it is highlighted how some long-standing scientific puzzles may be solved by considering non-linear models of heterogeneous agents with spatio-temporal inte...

  13. Activities of the O&M committee history & future perspectives

    Energy Technology Data Exchange (ETDEWEB)

    Poulis, D.S.

    1996-12-01

    This paper gives an overview of the Committee on Operation and Maintenance of Nuclear Power Plants, hereafter referred to as the O&M Committee, formed in June 1975 when the American National Standard Institute`s Committee on Reactor Plants and their Maintenance was disbanded. The O&M Committee`s history, structure, current focus and future perspectives will be presented. The purpose of this paper is to give information to industry and the public of the Committee`s on-going effort to make accurate and timely responses to the needs of the nuclear industry.

  14. Integrated O&M for energy generation and exchange facilities; O&M integral para instalaciones de generación e intercambio de energía

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2016-07-01

    Ingeteam Service, part of the Ingeteam Group, is a leading company in the provision of integrated O&M services at energy generation and exchange facilities worldwide. From its head office in the Albacete Science and Technology Park, it manages the work of the 1,300 employees that make up its global workforce, rendering services to wind farms, PV installations and power generation plants. In addition, it maintains an active participation strategy in a range of R&D+i programmes that improve the existing technologies and are geared towards new production systems and new diagnostic techniques, applied to renewables installation maintenance. (Author)

  15. Integrated Modeling Systems

    Science.gov (United States)

    1989-01-01

    American Economic Review , 71:1 (March 1981). 181 J.M. Jones and F. Zufryden. "Adding Explanatory Variables to a Consumer Purchase Behavior Model: An...McCall. "An Operational Measure of Liquidity," The American Economic Review , 761 (March 1986). WMSI Working Paper 329. 212 Nelson, R., R. Sarin, and R

  16. Robust Disaster Recovery System Model

    Institute of Scientific and Technical Information of China (English)

    2006-01-01

    Highly security-critical system should possess features of continuous service. We present a new Robust Disaster Recovery System Model (RDRSM). Through strengthening the ability of safe communications, RDRSM guarantees the secure and reliable command on disaster recovery. Its self-supervision capability can monitor the integrality and security of disaster recovery system itself. By 2D and 3D real-time visible platform provided by GIS, GPS and RS, the model makes the using, management and maintenance of disaster recovery system easier. RDRSM possesses predominant features of security, robustness and controllability. And it can be applied to highly security-critical environments such as E-government and bank. Conducted by RDRSM, an important E-government disaster recovery system has been constructed successfully. The feasibility of this model is verified by practice. We especially emphasize the significance of some components of the model, such as risk assessment, disaster recovery planning, system supervision and robust communication support.

  17. Mechanical Systems, Classical Models

    CERN Document Server

    Teodorescu, Petre P

    2007-01-01

    All phenomena in nature are characterized by motion; this is an essential property of matter, having infinitely many aspects. Motion can be mechanical, physical, chemical or biological, leading to various sciences of nature, mechanics being one of them. Mechanics deals with the objective laws of mechanical motion of bodies, the simplest form of motion. In the study of a science of nature mathematics plays an important role. Mechanics is the first science of nature which was expressed in terms of mathematics by considering various mathematical models, associated to phenomena of the surrounding nature. Thus, its development was influenced by the use of a strong mathematical tool; on the other hand, we must observe that mechanics also influenced the introduction and the development of many mathematical notions. In this respect, the guideline of the present book is precisely the mathematical model of mechanics. A special accent is put on the solving methodology as well as on the mathematical tools used; vectors, ...

  18. Size-controlled synthesis and formation mechanism of manganese oxide OMS-2 nanowires under reflux conditions with KMnO4 and inorganic acids

    Science.gov (United States)

    Zhang, Qin; Cheng, Xiaodi; Qiu, Guohong; Liu, Fan; Feng, Xionghan

    2016-05-01

    This study presents a simplified approach for size-controlled synthesis of manganese oxide octahedral molecular sieve (OMS-2) nanowires using potassium permanganate (KMnO4) and different inorganic acids (HCl, HNO3, and H2SO4) under reflux conditions. The morphology and nanostructure of the synthesized products are characterized by X-ray diffraction, Ar adsorption, and electron microscopy analysis, in order to elucidate the controlling effects of acid concentration and type as well as the formation mechanism of OMS-2 nanowires. The concentration of inorganic acid is a crucial factor controlling the phase of the synthesized products. OMS-2 nanowires are obtained with HCl at the concentration ≥0.96 mol/L or with HNO3 and H2SO4 at the concentrations ≥0.72 mol/L. Differently, the type of inorganic acid effectively determines the particle size of OMS-2 nanowires. When the acid is changed from HCl to HNO3 and H2SO4 in the reflux system, the average length of OMS-2 declines significantly by 60-70% (1104-442 and 339 nm), with minor decreased in the average width (43-39 and 34 nm). The formation of OMS-2 nanowires under reflux conditions with KMnO4 and inorganic acids involves a two-step process, i.e., the initial formation of layered manganese oxides, and subsequent transformation to OMS-2 via a dissolution-recrystallization process under acidic conditions. The proposed reflux route provides an alternative approach for synthesizing OMS-2 nanowires as well as other porous nano-crystalline OMS materials.

  19. XML Schema of PaGE-OM: snp.xsd [

    Lifescience Database Archive (English)

    Full Text Available org/2001/XMLSchema xmlns:fuge=http://www.omg.org/spec/PAGE-OM/20090722/fuge> in public... The DNA sequence of a Genomic_variation as it appears in the public databa...e> Biological sequence. A sequence accessioned by a public...name who is involved with creating or disseminating publications. Possible roles

  20. Genetica en beweging – De moeite waard om te leren

    NARCIS (Netherlands)

    Jong, de J.H.S.G.M.

    2012-01-01

    Het tiende boek in de NVON-reeks heeft als titel Genetica in beweging, de moeite waard om te leren. Op 25 april 2012 zal dit boek worden gepresenteerd tijdens een studiemiddag. Ter gelegenheid daarvan heeft prof. Hans de Jong het volgende artikel voor NVOX geschreven.

  1. Waar Piketty om vraagt is een betere inkomstenbelasting

    NARCIS (Netherlands)

    Wijtvliet, L.W.D.

    2014-01-01

    De tekortkomingen in het belastingstelsel waar Piketty op wijst zijn op te lossen door het wegnemen van de ongelijke fiscale behandeling van verschillende vormen van inkomen. Dat idee is al in 1896 uitgewerkt en later verfijnd; nu is de tijd rijp om dit te realiseren, stelt fiscaal econoom Laurens W

  2. Konstant online og fantasien om ’individuel balance’

    DEFF Research Database (Denmark)

    Villadsen, Kaspar

    2015-01-01

    Smartphones og andre mobile kommunikationsteknologier indføres med løfter om at give øget handlekraft og individuel frihed i arbejdslivet. Men et voksende forskningsfelt påviser, at indførelse af disse teknologier ledsages af øget netværksbaseret kontrol og selv-pålagt arbejdsintensivering. Artik...

  3. Temadag om registrering/katalogisering til Web-katalogen

    DEFF Research Database (Denmark)

    Hansen, Hanne Hørl; Hammershøi, Lene

    2002-01-01

    Referat fra temadag om registrering/katalogisering til Web-katalogen afholdt af DFs Interessekreds for Registrering på RUC d. 13.marts 2002. Oplægsholdere fra Danmark og England gav deres bud på status og udviklingstendenser for arbejdet med at skabe og forbedre web-baserede bibliotekskataloger...

  4. Globale byer kæmper om investeringer

    DEFF Research Database (Denmark)

    Geisler Asmussen, Christian; Nielsen, Bo Bernhard

    2013-01-01

    Vækst. Der er en reel risiko for, at Danmark går glip af milliarder i jobskabende investeringer i løbet af de næste år. Det sker, hvis multinationale selskaber går uden om København, når de skal beslutte, hvor nye datterselskaber og regionale hovedkvarterer skal ligge....

  5. Groen in en om de stad : onderzoek GIOS 2006

    NARCIS (Netherlands)

    Timmermans, W.; Hiddes, E.; Visschedijk, P.A.M.; Gerritsen, E.; Woestenburg, M.

    2006-01-01

    Alterra heeft samen met LNV een flexibele werkvorm ontwikkeld om het belang van groen in de moderne metropool in de praktijk te tonen. Een deel van het overzicht is agenderend uitgevoerd. Een deel is gericht op concrete en actuele beleidsvragen van het ministerie en van meefinancierende gemeenten. D

  6. Historien om den kostbare læringstid

    DEFF Research Database (Denmark)

    Henriksen, Carsten

    2015-01-01

    Danmarkshistorien har aldrig rigtig haft plads til de mindste børn. Men nu fortæller forskere fra DPU for første gang historien om, hvordan nutidens daginstitutioner og den moderne pædagogprofession er blevet til. Overraskende viser det sig, at politikere og pædagogiske tænkere gennem de sidste 2...

  7. Danske droner - en nuancering af debatten om ubemandede fly

    DEFF Research Database (Denmark)

    Ringsmose, Jens

    I et interview med Information i sommeren 2012 åbnede tidligere forsvarsminister, Nick Hækkerup, for alvor debatten om en mere udstrakt dansk brug af droner til militære formål. Siden da er adskillige mere eller mindre valide argumenter for anvendelsen af ubemandede fly blevet bragt i spil. Denne...

  8. Cinemateket - et projekt om ekstern kommunikation

    OpenAIRE

    Kirchhoff, Daniel Pilpel; Bang, Thomas Holmboe; Hansen, Martin Thenning; McGhie, Steffen Nyboe; Sørensen, Kristine Halken; Nielsen, Stina Bach; Kristensen, Nicoline Kjelbjerg

    2007-01-01

    Our focus in this project is defining the target audience of the Cinemateque. Furthermore we have looked at their communication strategy, in order to give advice on ways in which they can optimize their marketing. Using the theories of Jan Krag Jacobsen and Preben Sepstrup amongst others, we can conclude that a company must aim their marketing activities towards carefully specified target audiences. We have chosen Henrik Dahl's segmentation model to define their target audience, and have foun...

  9. Studies of Catalytic Model Systems

    DEFF Research Database (Denmark)

    Holse, Christian

    The overall topic of this thesis is within the field of catalysis, were model systems of different complexity have been studied utilizing a multipurpose Ultra High Vacuum chamber (UHV). The thesis falls in two different parts. First a simple model system in the form of a ruthenium single crystal...... is investigated. Second the development of a complex Cu/ZnO nanoparticle model system is described and gas-induced dynamical changes in the model system is investigated. The ruthenium crystal serves as an extremely simple model for studying CO dissociation which is the rate limiting step of the methanation...... process. The Ru(0 1 54) surface is studied by means of Scanning Tunneling Microscopy (STM), Temperature Programmed Desoprtion (TPD), and Oxygen Titration (OT) experiments. Real space evidence of periodic features on every second monatomic step is observed via STM when the a clean ruthenium surface...

  10. Relocatable Coastal Modeling System

    Science.gov (United States)

    2016-06-07

    These relationships are stored on a variable-resolution grid (illustrated in figure 1b below) with sampling of 1 degree in deep water (and in data...version is referred to as MODAS2.1, which is now operational at NAVO. The NOMADS interface is being replaced by a system-independent, web -based version...inside the user’s web browser plus Perl CGI scripts which ran on a webserver. This permitted the user to run MODAS (and POM and other modules as they are

  11. Hvad sagde vi! ...om "De Andre"

    DEFF Research Database (Denmark)

    Jørgensen, Lars

    This PhD.-dissertation has investigated the political debate on immigration-, refugee and integration policies in Denmark between 1961 and 1998. Focus has been on parliamentary debates and the main purpose has been to clarify the development of attitudes among the political parties towards...... and the labour market system of the Danish welfare state. The concept of political culture in Denmark is investigated and it is argued that there exists a historically dependent and particular Danish notion of the relations between State, Nation and the People. This notion has influenced the ways issues...... the concept of integration of ethnic minorities and discuss how these changes affected the actual policies. The theoretical approach concentrates partly on how the political system in Denmark works on various levels, and partly on mainly cultural studies of the encounter between ethnic minorities...

  12. Engineering description of the OMS/RCS/DAP modes used in the HP-9825A High Fidelity Relative Motion Program (HFRMP)

    Science.gov (United States)

    Wilson, S. W.

    1978-01-01

    Simplified mathematical models are reported for the space shuttle's Orbital Maneuvering System (OMS), Reaction Control System (RCS), and on-orbit Digital Autopilot (DAP) that have been incorporated in the High-Fidelity Relative Motion Program (HFRMP) for the HP-9825A desk-top calculator. Comparisons were made between data generated by the HFRMP and by the Space Shuttle Functional Simulator (SSFS), which models the cited shuttle systems in much greater detail. These data include propellant requirements for representative translational maneuvers, rotational maneuvers, and attitude maintenance options. Also included are data relating to on-orbit trajectory deviations induced by RCS translational cross coupling. Potential close-range stationkeeping problems that are suggested by HFRMP simulations of 80 millisecond (as opposed to 40 millisecond) DAP cycle effects are described. The principal function of the HFRMP is to serve as a flight design tool in the area of proximity operations.

  13. Hydronic distribution system computer model

    Energy Technology Data Exchange (ETDEWEB)

    Andrews, J.W.; Strasser, J.J.

    1994-10-01

    A computer model of a hot-water boiler and its associated hydronic thermal distribution loop has been developed at Brookhaven National Laboratory (BNL). It is intended to be incorporated as a submodel in a comprehensive model of residential-scale thermal distribution systems developed at Lawrence Berkeley. This will give the combined model the capability of modeling forced-air and hydronic distribution systems in the same house using the same supporting software. This report describes the development of the BNL hydronics model, initial results and internal consistency checks, and its intended relationship to the LBL model. A method of interacting with the LBL model that does not require physical integration of the two codes is described. This will provide capability now, with reduced up-front cost, as long as the number of runs required is not large.

  14. Data management system performance modeling

    Science.gov (United States)

    Kiser, Larry M.

    1993-01-01

    This paper discusses analytical techniques that have been used to gain a better understanding of the Space Station Freedom's (SSF's) Data Management System (DMS). The DMS is a complex, distributed, real-time computer system that has been redesigned numerous times. The implications of these redesigns have not been fully analyzed. This paper discusses the advantages and disadvantages for static analytical techniques such as Rate Monotonic Analysis (RMA) and also provides a rationale for dynamic modeling. Factors such as system architecture, processor utilization, bus architecture, queuing, etc. are well suited for analysis with a dynamic model. The significance of performance measures for a real-time system are discussed.

  15. Kommunikasie as metode om verpleegsorg te verbeter

    Directory of Open Access Journals (Sweden)

    G. Postmus

    1984-09-01

    Full Text Available With the large number of patients in particularly academic hospital wards and the shortage of nursing staff total patient care is not possible. This is leading to increasing task-orientation and a widening of communication gaps which are affecting the quality of nursing care. One of the main problems is that it is impossible for nurses to remember all the details given during the regular reports off by heart. Neither does the nurse know which regular oral medications each patient is receiving. The nurse is thus unable to make the required observations while doing patient care and does not provide the necessary feedback. The author suggests a simple system, based mainly on the use of patient bed lists and a note book carried by each nurse to improve communication and achieve a higher standard of nursing care within a short period.

  16. Effects of aeration rate on degradation process of oil palm empty fruit bunch with kinetic-dynamic modeling.

    Science.gov (United States)

    Talib, Ahmad Tarmezee; Mokhtar, Mohd Noriznan; Baharuddin, Azhari Samsu; Sulaiman, Alawi

    2014-10-01

    The effect of different aeration rates on the organic matter (OM) degradation during the active phase of oil palm empty fruit bunch (EFB)-rabbit manure co-composting process under constant forced-aeration system has been studied. Four different aeration rates, 0.13 L min(-1) kg(DM)(-1),0.26 L min(-1) kg(DM)(-1),0.49 L min(-1) kg(DM)(-1) and 0.74 L min(-1) kg(DM)(-1) were applied. 0.26 L min(-1) kg(DM)(-1) provided enough oxygen level (10%) for the rest of composting period, showing 40.5% of OM reduction that is better than other aeration rates. A dynamic mathematical model describing OM degradation, based on the ratio between OM content and initial OM content with correction functions of moisture content, free air space, oxygen and temperature has been proposed.

  17. Hvilket barn? Om barn, barndom og barnehage

    Directory of Open Access Journals (Sweden)

    Agnes Andenæs

    2012-01-01

    Full Text Available Title: What kind of a child? On children’s everyday life, Early Childhood Education, and psychological developmentAbstract: Public discussions about day care more or less explicitly refer to models about children’s development. My argument is that the field of Early Childhood Education does need understandings offered by the discipline of developmental psychology, but that the hegemonic ones strongly restrict ways of talking about what is going on at the day care institutions, and what day care means to the participants, included parents and other caretakers. A more context sensitive and meaning making oriented version of developmental psychology is presented, and empirical examples are used to demonstrate how this way of understanding children widens up ways of talking about day care: as an arena for children’s participation, as a link in parents’ chain of care for their child, and as a meeting point for diversity. Keywords: Developmental psychology; Day care; Everyday life; Parenthood; Chain of care; Social participation

  18. Corrections to Reissner-Nordstr\\"om black hole solution due to exponential nonlinear electrodynamics

    CERN Document Server

    Kruglov, S I

    2016-01-01

    An exponential model of nonlinear electrodynamics coupled with the gravitational field is analyzed. It was shown that weak, dominant, and strong energy conditions are satisfied. We obtain corrections to Coulomb's law at $r\\rightarrow\\infty$. It was demonstrated that electric-magnetic duality between ${\\cal F}$ and ${\\cal P}$ frames is violated. The asymptotic black hole solution at $r\\rightarrow \\infty$ is found that contains corrections to the Reissner-Nordstr\\"om solution. The electromagnetic mass of the black hole is calculated, expressed through the parameter $\\beta$ of the model.

  19. National Energy Outlook Modelling System

    Energy Technology Data Exchange (ETDEWEB)

    Volkers, C.M. [ECN Policy Studies, Petten (Netherlands)

    2013-12-15

    For over 20 years, the Energy research Centre of the Netherlands (ECN) has been developing the National Energy Outlook Modelling System (NEOMS) for Energy projections and policy evaluations. NEOMS enables 12 energy models of ECN to exchange data and produce consistent and detailed results.

  20. ABSTRACT MODELS FOR SYSTEM VIRTUALIZATION

    Directory of Open Access Journals (Sweden)

    M. G. Koveshnikov

    2015-05-01

    Full Text Available The paper is dedicated to issues of system objects securing (system files and user system or application configuration files against unauthorized access including denial of service attacks. We have suggested the method and developed abstract system virtualization models, which are used toresearch attack scenarios for different virtualization modes. Estimation for system tools virtualization technology effectiveness is given. Suggested technology is based on redirection of access requests to system objects shared among access subjects. Whole and partial system virtualization modes have been modeled. The difference between them is the following: in the whole virtualization mode all copies of access system objects are created whereon subjects’ requests are redirected including corresponding application objects;in the partial virtualization mode corresponding copies are created only for part of a system, for example, only system objects for applications. Alternative solutions effectiveness is valued relating to different attack scenarios. We consider proprietary and approved technical solution which implements system virtualization method for Microsoft Windows OS family. Administrative simplicity and capabilities of correspondingly designed system objects security tools are illustrated on this example. Practical significance of the suggested security method has been confirmed.

  1. PLB, vertical tail, OMS pods above Earth with moon in distant background

    Science.gov (United States)

    1983-01-01

    Payload bay (PLB) equipment, payloads, and experiments include remote manipulator system (RMS) stowed on port side sill longeron, Development Flight Instrument (DFI) pallet with High Capacity Heat Pipe Experiment, Special Philatelic Covers in two large storage (mail) boxes, Evaluation of Oxygen Interaction with Materials (EOIM) experiment trays, and Advanced Flexible Reusable Surface Insulation (AFRSI) blanket in foreground and Payload Flight Test Article (PFTA) behind DFI pallet. Vertical tail with orbital maneuvering system (OMS) pods at base points to Earth's cloud-covered surface with gibbous moon in distance.

  2. Aerodynamic and Mechanical System Modelling

    DEFF Research Database (Denmark)

    Jørgensen, Martin Felix

    This thesis deals with mechanical multibody-systems applied to the drivetrain of a 500 kW wind turbine. Particular focus has been on gearbox modelling of wind turbines. The main part of the present project involved programming multibody systems to investigate the connection between forces, moments...

  3. Experimental Modeling of Dynamic Systems

    DEFF Research Database (Denmark)

    Knudsen, Morten Haack

    2006-01-01

    An engineering course, Simulation and Experimental Modeling, has been developed that is based on a method for direct estimation of physical parameters in dynamic systems. Compared with classical system identification, the method appears to be easier to understand, apply, and combine with physical...

  4. An extensible analysable system model

    DEFF Research Database (Denmark)

    Probst, Christian W.; Hansen, Rene Rydhof

    2008-01-01

    , this does not hold for real physical systems. Approaches such as threat modelling try to target the formalisation of the real-world domain, but still are far from the rigid techniques available in security research. Many currently available approaches to assurance of critical infrastructure security...... allows for easy development of analyses for the abstracted systems. We briefly present one application of our approach, namely the analysis of systems for potential insider threats....

  5. Summary of LO2/Ethanol OMS/RCS Technology and Advanced Development 99-2744

    Science.gov (United States)

    Curtis, Leslie A.; Hurlbert, Eric A.

    1999-01-01

    NASA is pursuing non-toxic propellant technologies applicable to RLV and Space Shuttle orbital maneuvering system (OMS) and reaction control system (RCS). The primary objectives of making advancements in an OMS/RCS system are improved safety, reliability, and reduced operations and maintenance cost, while meeting basic operational and performance requirements. An OMS/RCS has a high degree of direct interaction with the vehicle and crew and requires subsystem and components that are compatible with integration into the vehicle with regard to external mold-line, power, and thermal control. In July 1997, a Phase I effort for the technology and advanced development of an upgrade of the space shuttle was conducted to define the system architecture, propellant tank, feed system, RCS thrusters, and OMS engine. Phase I of the project ran from July 1997 to October 1998. Phase II is currently being planned for the development and test of full-scale prototype of the system in 1999 and 2000. The choice of pressure-fed liquid oxygen (LO2) and ethanol is the result of numerous trade studies conducted from 1980 to 1996. Liquid oxygen and ethanol are clean burning, high-density propellants that provide a high degree of commonality with other spacecraft subsystems including life support, power, and thermal control, and with future human exploration and development of space missions. The key to this pressure-fed system is the use of subcooled liquid oxygen at 350 psia. In this approach, there is 80 degrees R of subcooling, which means that boil-off will not occur until the temperature has risen 80 R. The sub-cooling results naturally from loading propellants at 163 R, which is the saturation temperature at 14.7 psia, and then pressurizing to 350 psia on the launch pad. Thermal insulation and conditioning techniques are then used to limit the LO2 temperature to 185 R maximum, and maintain the sub-cooling. The other key is the wide temperature range of ethanol, -173 F to +300 F, which

  6. Modeling Multi-Level Systems

    CERN Document Server

    Iordache, Octavian

    2011-01-01

    This book is devoted to modeling of multi-level complex systems, a challenging domain for engineers, researchers and entrepreneurs, confronted with the transition from learning and adaptability to evolvability and autonomy for technologies, devices and problem solving methods. Chapter 1 introduces the multi-scale and multi-level systems and highlights their presence in different domains of science and technology. Methodologies as, random systems, non-Archimedean analysis, category theory and specific techniques as model categorification and integrative closure, are presented in chapter 2. Chapters 3 and 4 describe polystochastic models, PSM, and their developments. Categorical formulation of integrative closure offers the general PSM framework which serves as a flexible guideline for a large variety of multi-level modeling problems. Focusing on chemical engineering, pharmaceutical and environmental case studies, the chapters 5 to 8 analyze mixing, turbulent dispersion and entropy production for multi-scale sy...

  7. Fremmedkrigere i terroristers tjeneste - internationale, europæiske og danske regler om foreign terrorist fighters

    DEFF Research Database (Denmark)

    Vestergaard, Jørn

    2016-01-01

    Fremmedkrigere i terroristers tjeneste – internationale, europæiske og danske regler om foreign terrorist fighters......Fremmedkrigere i terroristers tjeneste – internationale, europæiske og danske regler om foreign terrorist fighters...

  8. Modellering af elforbrug til netanalyse

    DEFF Research Database (Denmark)

    Østergaard, Jacob

    I denne rapport undersøges mulighederne for at etablere en model for elforbruget, der kan anvendes ved analyser af det østdanske transmissionsnet. Rapporten henvender sig til ingeniører og beslutningstagere, der ønsker viden om betydningen af en nøjagtig elforbrugsmodel og om mulighederne for i p...... simuleringsresultater med mindre usikkerhed, og der opnås en integration mellem eksisterende systemer, idet data fra en række systemer bl.a. Panda, elforbrugsprognoser, elforbrugspaneler og stationsprognoser kan udnyttes til etableringen af en model....

  9. New directions and challenges for the O&M committee

    Energy Technology Data Exchange (ETDEWEB)

    Pelletier, J.P.

    1996-12-01

    In the second half of the decade of the nineties, the imperative of finding new ways to improve efficiency while maintaining safety is taking on a new urgency. The looming deregulation of the electric industry and the expected competition in the power production business fuels this urgency. The recently completed ASME research in the area of Risk-Based Inservice Testing offers the Operations and Maintenance (O&M) Committee an opportunity to meet this challenge. This opportunity, however, offers its own challenges. New ways of thinking about inservice testing and new technical skills will be needed to successfully incorporate this technology into Code documents. It will not be adequate to rely solely on incorporation of risk-based methods into the Code to meet this challenge. A thorough self assessment of what O&M does, how it is done, and the value added will help assure that the directions which are pursued do, indeed, meet the challenge ahead.

  10. Gentagelse vs. Genbeskrivelse. Om forholdet mellem instrumentelle og artistiske praksisser

    Directory of Open Access Journals (Sweden)

    Jacob Storch

    2012-10-01

    Full Text Available Coachingfeltet flyder over med metoder og teknikker til udvikling i og af samtaler. Men sjældent stilles derkritisk lys på metodernes grænser og begrænsninger, og diskuteres en metodes begrænsninger gøres det stortset altid for at pege på et alternativ. Heroverfor peger vi i artiklen på, med afsæt i Rorty’s neopragmiatisme,at der er noget principielt uforeneligt mellem på den ene side idealet om coaching som en frisættende praksisog på den anden side tanken om, at frisættelsen kan ske ved at samtalen følger en bestemt struktur. Artiklenslutter af med, stadig med Rorty, at pege på metaforen, improvisationen og ironien som alternative frihedsunderstøttendesamtalepraksisser.

  11. Distribution system modeling and analysis

    CERN Document Server

    Kersting, William H

    2002-01-01

    For decades, distribution engineers did not have the sophisticated tools developed for analyzing transmission systems-often they had only their instincts. Things have changed, and we now have computer programs that allow engineers to simulate, analyze, and optimize distribution systems. Powerful as these programs are, however, without a real understanding of the operating characteristics of a distribution system, engineers using the programs can easily make serious errors in their designs and operating procedures.Distribution System Modeling and Analysis helps prevent those errors. It gives re

  12. Om at bo sammen i et multietnisk boligområde

    DEFF Research Database (Denmark)

    Hansen, Knud Erik; Hansen, Annette Heron; Kalkan, Hakan

    De historier, der fortælles om livet i de multietniske boligområder er ofte historier om ballade, ødelæggelser og  utryghed. Det er ofte historier om unge, der har en aparteadfærd. Der er meget få historier om, hvordan de voksne agerer i boligområdet. Denne rapport dykker ned i livet de voksne im...

  13. Stirling Engine Dynamic System Modeling

    Science.gov (United States)

    Nakis, Christopher G.

    2004-01-01

    The Thermo-Mechanical systems branch at the Glenn Research Center focuses a large amount time on Stirling engines. These engines will be used on missions where solar power is inefficient, especially in deep space. I work with Tim Regan and Ed Lewandowski who are currently developing and validating a mathematical model for the Stirling engines. This model incorporates all aspects of the system including, mechanical, electrical and thermodynamic components. Modeling is done through Simplorer, a program capable of running simulations of the model. Once created and then proven to be accurate, a model is used for developing new ideas for engine design. My largest specific project involves varying key parameters in the model and quantifying the results. This can all be done relatively trouble-free with the help of Simplorer. Once the model is complete, Simplorer will do all the necessary calculations. The more complicated part of this project is determining which parameters to vary. Finding key parameters depends on the potential for a value to be independently altered in the design. For example, a change in one dimension may lead to a proportional change to the rest of the model, and no real progress is made. Also, the ability for a changed value to have a substantial impact on the outputs of the system is important. Results will be condensed into graphs and tables with the purpose of better communication and understanding of the data. With the changing of these parameters, a more optimal design can be created without having to purchase or build any models. Also, hours and hours of results can be simulated in minutes. In the long run, using mathematical models can save time and money. Along with this project, I have many other smaller assignments throughout the summer. My main goal is to assist in the processes of model development, validation and testing.

  14. Ph.d. om interne sociale medier : Det sociale intranet

    DEFF Research Database (Denmark)

    Madsen, Vibeke Thøis

    2017-01-01

    Det sociale intranet eller interne sociale medier vækker drømme hos virksomheder, som ser en mulighed for at involvere og engagere medarbejderne. Det sociale intranet bliver opfattet som en genvej til mere innovative og effektive virksomheder. En ny ph.d. om medarbejderne som kommunikatører på...... interne sociale medier viser imidlertid, at virksomheder kæmper med at skabe en aktiv og levende kommunikation på det sociale intranet...

  15. Complexity of OM factorizations of polynomials over local fields

    CERN Document Server

    Bauch, Jens-Dietrich; Stainsby, Hayden D

    2012-01-01

    Let $k$ be a locally compact complete field with respect to a discrete valuation $v$. Let $\\oo$ be the valuation ring, $\\m$ the maximal ideal and $F(x)\\in\\oo[x]$ a monic separable polynomial of degree $n$. Let $\\delta=v(\\dsc(F))$. The Montes algorithm computes an OM factorization of $F$. The single-factor lifting algorithm derives from this data a factorization of $F \\md{\\m^\

  16. Graphisme et géométrie

    CERN Document Server

    Fleury, Michel

    1986-01-01

    Une introduction à l'étude des rythmes visuels d'un point de vue géométrique et algorithmique. L'auteur montre le rôle de l'informatique dans la réalisation des dessins rythmiques et explique que la variété des rythmes visuels s'ordonne en classes distinctes associées à des algorithmes de production.

  17. Circular motion in Reissner-Nordstr\\"om spacetime

    CERN Document Server

    Pugliese, Daniela; Ruffini, Remo

    2010-01-01

    We study the motion of neutral test particles along circular orbits in the Reissner-Nordstr\\"om spacetime. We use the method of the effective potential with the constants of motion associated to the underlying Killing symmetries. A comparison between the black hole and naked singularity cases is performed. In particular we find that in the naked singularity case for $rQ^2/M$ and $1\\sqrt{5}/2$ there are all stable circular orbits for $r>Q^2/M$.

  18. Udspil om læring i arbejdslivet

    DEFF Research Database (Denmark)

    . Der mangler dog et generelt overblik over feltet arbejdspladslæring. Det råder antologien UDSPIL OM LÆRING I ARBEJDSLIVET nu bod på. Bogen er den første udgivelse fra Learning Lab Denmark. Bag bogen står en række forskere tilknyttet konsortiet Workplace Learning. I bogen gennemgår forfatterne...

  19. Om strukturledighed og Phillips-kurver i SMEC og ADAM

    DEFF Research Database (Denmark)

    Harck, Søren H.

    2001-01-01

    Denne note er et upubliceret indlæg i en diskussion om strukturledighed, Phillips-kurver og dansk økonomisk-politisk debat, som udspandt sig i Nationaløkonomisk Tidsskrift i 1996/1997, og som blev udløst af en artikel af Peter Skott (PS), der skulle vise sig at være meget kontroversiel. Indlægget...

  20. Oplevelsens Kvalitet. Om kvalitetskriterier i kunst og kulturindustri

    Directory of Open Access Journals (Sweden)

    Kim Schrøder

    1988-08-01

    Full Text Available De fleste af os har en helt klar fornemmelse for, hvad der er skidt og kanel på kulturmarkedet, hvadenten det drejer sig om maleri, musik, litteratur eller TV-fiktion. Kim Schrøder plæderer i denne artikel for, at den øgede indsigt i tekstoplevelser, som receptionsforskningen har skabt i de senere år, må føre frem til en rehabilitering af "den folkelige smag" og til et opgør med "den gode smags tyranni": med den herskende opfat- telse af kulturel kvalitet, der ser bort fra oplevelseskvaliteten og udelukkende baserer sin kvalitetsvurdering på værkets formelle æstetiske træk. Han rejser bl.a. det spørgsmål, om man ikke bliver nødt til at opgive en almengyldig forestilling om, hvad kvalitet er, så både "godt" og "dårligt" altid er godt og dårligt for nogen? - Men hvis man virkelig accepterer, at "smag og behag er forskellig", må det få kulturpoliti- ske konsekvenser, som artiklen til slut kommer ind på.

  1. Begreber og indfaldsvinkler i forskningsprogrammet om social arv

    DEFF Research Database (Denmark)

    Ploug, Niels

    opvækstvilkår og livschancer. Tværtimod ser denne sammenhæng ud til at være relativt stabil jf Erikson & Goldthorpe (1992), Hansen (1995). Den hidtidige forskning har således bidraget til at slå fast, at udbygningen af velfærdsstaten – mod forventning - ikke har elimineret den negative sociale arv. Den......Forskningsprogrammet om social arv er igangsat ud fra en politisk målsætning om at opnå ny forskningsbaseret viden som et input til politiske bestræbelser på at bekæmpe ’den negative sociale arv’. Politisk er det således en klar målsætning med programmet at opnå viden om forhold, der bidrager til...... forskningsmæssige udfordring bliver derfor at finde forhold, der kan forklare hvorfor en bevidst satsning på lighed gennem afskaffelse af fattigdom og satsning på uddannelse, ikke har ført til et samfund med lige chancer for alle. I den forbindelse er det relevant at overveje på, hvad begrebet ’social arv’ kan...

  2. Begreber og indfaldsvinkler i forskningsprogrammet. Forskningsprogrammet om social arv

    DEFF Research Database (Denmark)

    Ploug, Niels

    opvækstvilkår og livschancer. Tværtimod ser denne sammenhæng ud til at være relativt stabil jf Erikson & Goldthorpe (1992), Hansen (1995). Den hidtidige forskning har således bidraget til at slå fast, at udbygningen af velfærdsstaten – mod forventning - ikke har elimineret den negative sociale arv. Den......Forskningsprogrammet om social arv er igangsat ud fra en politisk målsætning om at opnå ny forskningsbaseret viden som et input til politiske bestræbelser på at bekæmpe ’den negative sociale arv’. Politisk er det således en klar målsætning med programmet at opnå viden om forhold, der bidrager til...... forskningsmæssige udfordring bliver derfor at finde forhold, der kan forklare hvorfor en bevidst satsning på lighed gennem afskaffelse af fattigdom og satsning på uddannelse, ikke har ført til et samfund med lige chancer for alle. I den forbindelse er det relevant at overveje på, hvad begrebet ’social arv’ kan...

  3. Kinetic Modeling of Biological Systems

    Energy Technology Data Exchange (ETDEWEB)

    Resat, Haluk; Petzold, Linda; Pettigrew, Michel F.

    2009-04-21

    The dynamics of how its constituent components interact define the spatio-temporal response of a natural system to stimuli. Modeling the kinetics of the processes that represent a biophysical system has long been pursued with the aim of improving our understanding of the studied system. Due to the unique properties of biological systems, in addition to the usual difficulties faced in modeling the dynamics of physical or chemical systems, biological simulations encounter difficulties that result from intrinsic multiscale and stochastic nature of the biological processes. This chapter discusses the implications for simulation of models involving interacting species with very low copy numbers, which often occur in biological systems and give rise to significant relative fluctuations. The conditions necessitating the use of stochastic kinetic simulation methods and the mathematical foundations of the stochastic simulation algorithms are presented. How the well-organized structural hierarchies often seen in biological systems can lead to multiscale problems, and possible ways to address the encountered computational difficulties are discussed. We present the details of the existing kinetic simulation methods, and discuss their strengths and shortcomings. A list of the publicly available kinetic simulation tools and our reflections for future prospects are also provided.

  4. Atomic Hydrogen Surrounded by Water Molecules, H(H2O)m, Modulates Basal and UV-Induced Gene Expressions in Human Skin In Vivo

    Science.gov (United States)

    Shin, Mi Hee; Park, Raeeun; Nojima, Hideo; Kim, Hyung-Chel; Kim, Yeon Kyung; Chung, Jin Ho

    2013-01-01

    Recently, there has been much effort to find effective ingredients which can prevent or retard cutaneous skin aging after topical or systemic use. Here, we investigated the effects of the atomic hydrogen surrounded by water molecules, H(H2O)m, on acute UV-induced responses and as well as skin aging. Interestingly, we observed that H(H2O)m application to human skin prevented UV-induced erythema and DNA damage. And H(H2O)m significantly prevented UV-induced MMP-1, COX-2, IL-6 and IL-1β mRNA expressions in human skin in vivo. We found that H(H2O)m prevented UV-induced ROS generation and inhibited UV-induced MMP-1, COX-2 and IL-6 expressions, and UV-induced JNK and c-Jun phosphorylation in HaCaT cells. Next, we investigated the effects of H(H2O)m on intrinsically aged or photoaged skin of elderly subjects. In intrinsically aged skin, H(H2O)m application significantly reduced constitutive expressions of MMP-1, IL-6, and IL-1β mRNA. Additionally, H(H2O)m significantly increased procollagen mRNA and also decreased MMP-1 and IL-6 mRNA expressions in photoaged facial skin. These results demonstrated that local application of H(H2O)m may prevent UV-induced skin inflammation and can modulate intrinsic skin aging and photoaging processes. Therefore, we suggest that modifying the atmospheric gas environment within a room may be a new way to regulate skin functions or skin aging. PMID:23637886

  5. Executive Information Systems' Multidimensional Models

    Directory of Open Access Journals (Sweden)

    2007-01-01

    Full Text Available Executive Information Systems are design to improve the quality of strategic level of management in organization through a new type of technology and several techniques for extracting, transforming, processing, integrating and presenting data in such a way that the organizational knowledge filters can easily associate with this data and turn it into information for the organization. These technologies are known as Business Intelligence Tools. But in order to build analytic reports for Executive Information Systems (EIS in an organization we need to design a multidimensional model based on the business model from the organization. This paper presents some multidimensional models that can be used in EIS development and propose a new model that is suitable for strategic business requests.

  6. Numerical Modeling of Microelectrochemical Systems

    DEFF Research Database (Denmark)

    Adesokan, Bolaji James

    for the reactants in the bulk electrolyte that are traveling waves. The first paper presents the mathematical model which describes an electrochemical system and simulates an electroanalytical technique called cyclic voltammetry. The model is governed by a system of advection–diffusion equations with a nonlinear...... reaction term at the boundary. We investigate the effect of flow rates, scan rates, and concentration on the cyclic voltammetry. We establish that high flow rates lead to the reduced hysteresis in the cyclic voltammetry curves and increasing scan rates lead to more pronounced current peaks. The final part...... of the paper shows that the response current in a cyclic voltammetry increases proportionally to the electrolyte concentration. In the second paper we present an experiment of an electrochemical system in a microfluidc system and compare the result to the numerical solutions. We investigate how the position...

  7. Salivary Tick Cystatin OmC2 Targets Lysosomal Cathepsins S and C in Human Dendritic Cells

    Directory of Open Access Journals (Sweden)

    Tina Zavašnik-Bergant

    2017-06-01

    Full Text Available To ensure successful feeding tick saliva contains a number of inhibitory proteins that interfere with the host immune response and help to create a permissive environment for pathogen transmission. Among the potential targets of the salivary cystatins are two host cysteine proteases, cathepsin S, which is essential for antigen- and invariant chain-processing, and cathepsin C (dipeptidyl peptidase 1, DPP1, which plays a critical role in processing and activation of the granule serine proteases. Here, the effect of salivary cystatin OmC2 from Ornithodoros moubata was studied using differentiated MUTZ-3 cells as a model of immature dendritic cells of the host skin. Following internalization, cystatin OmC2 was initially found to inhibit the activity of several cysteine cathepsins, as indicated by the decreased rates of degradation of fluorogenic peptide substrates. To identify targets, affinity chromatography was used to isolate His-tagged cystatin OmC2 together with the bound proteins from MUTZ-3 cells. Cathepsins S and C were identified in these complexes by mass spectrometry and confirmed by immunoblotting. Furthermore, reduced increase in the surface expression of MHC II and CD86, which are associated with the maturation of dendritic cells, was observed. In contrast, human inhibitor cystatin C, which is normally expressed and secreted by dendritic cells, did not affect the expression of CD86. It is proposed that internalization of salivary cystatin OmC2 by the host dendritic cells targets cathepsins S and C, thereby affecting their maturation.

  8. A Xhosa language translation of the CORE-OM using South African university student samples.

    Science.gov (United States)

    Campbell, Megan M; Young, Charles

    2016-10-01

    The translation of well established psychometric tools from English into Xhosa may assist in improving access to psychological services for Xhosa speakers. The aim of this study was to translate the Clinical Outcomes in Routine Evaluation - Outcome Measure (CORE-OM), a measure of general distress and dysfunction developed in the UK, into Xhosa for use at South African university student counselling centres. The CORE-OM and embedded CORE-10 were translated into Xhosa using a five-stage translation design. This design included (a) forward-translation, (b) back-translation, (c) committee approach, (d) qualitative piloting, and (e) quantitative piloting on South African university students. Clinical and general samples were drawn from English-medium South African universities. Clinical samples were generated from university student counselling centres. General student samples were generated through random stratified cluster sampling of full-time university students. Qualitative feedback from the translation process and results from quantitative piloting of the 34-item CORE-OM English and Xhosa versions supported the reduction of the scale to 10 items. This reduced scale is referred to as the South African CORE-10 (SA CORE-10). A measurement and structural model of the SA CORE-10 English version was developed and cross-validated using an English-speaking university student sample. Equivalence of this model with the SA CORE-10 Xhosa version was investigated using a first-language Xhosa-speaking university sample. Partial measurement equivalence was achieved at the metric level. The resultant SA CORE-10 Xhosa and English versions provide core measures of distress and dysfunction. Additional, culture- and language-specific domains could be added to increase sensitivity and specificity.

  9. Quark Model and multiquark system

    CERN Document Server

    da Silva, Cristiane Oldoni

    2010-01-01

    The discovery of many particles, especially in the 50's, when the firsts accelerators appeared, caused the searching for a model that would describe in a simple form the whole of known particles. The Quark Model, based in the mathematical structures of group theory, provided in the beginning of the 60's a simplified description of hadronic matter already known, proposing that three particles, called quarks, would originate all the observed hadrons. This model was able to preview the existence of particles that were later detected, confirming its consistency. Extensions of the Quark Model were made in the beginning of the 70's, focusing in describing observed particles that were excited states of the fundamental particles and others that presented new quantum numbers (flavors). Recently, exotic states as tetraquarks and pentaquarks types, also called multiquarks systems, previewed by the model, were observed, what renewed the interest in the way as quarks are confined inside the hadrons. In this article we pre...

  10. 对象管理系统%The Object Management System

    Institute of Scientific and Technical Information of China (English)

    宋擒豹; 沈钧毅

    2001-01-01

    As the kernal of the Integrated Software Engineering Environment,The Object Management System(OMS)manages various objects in a universal style.An OMS model,The Object-Relationship-Attribute(ORA)model,is proposed in this paper.And the archtecture of the Object Base and the OMS services are also discussed.%对象管理系统(Object Management System,OMS)是集成化软件工程环境的核心和纽带,它以统一的方式管理各种对象(Object)。文章提出了一种OMS模型即对象-关系-属性(ORA)模型,并介绍了相应的对象库结构及其服务设施。

  11. GENERIC model for multiphase systems

    NARCIS (Netherlands)

    Sagis, L.M.C.

    2010-01-01

    GENERIC is a nonequilibrium thermodynamic formalism in which the dynamic behavior of a system is described by a single compact equation involving two types of brackets: a Poisson bracket and a dissipative bracket. This formalism has proved to be a very powerful instrument to model the dynamic behavi

  12. Aerosol-climate interactions in the Norwegian Earth System Model - NorESM1-M

    Science.gov (United States)

    Kirkevåg, A.; Iversen, T.; Seland, Ø.; Hoose, C.; Kristjánsson, J. E.; Struthers, H.; Ekman, A. M. L.; Ghan, S.; Griesfeller, J.; Nilsson, E. D.; Schulz, M.

    2013-02-01

    The objective of this study is to document and evaluate recent changes and updates to the module for aerosols and aerosol-cloud-radiation interactions in the atmospheric module CAM4-Oslo of the core version of the Norwegian Earth System Model (NorESM), NorESM1-M. Particular attention is paid to the role of natural organics, sea salt, and mineral dust in determining the gross aerosol properties as well as the anthropogenic contribution to these properties and the associated direct and indirect radiative forcing. The aerosol module is extended from earlier versions that have been published, and includes life-cycling of sea salt, mineral dust, particulate sulphate, black carbon, and primary and secondary organics. The impacts of most of the numerous changes since previous versions are thoroughly explored by sensitivity experiments. The most important changes are: modified prognostic sea salt emissions; updated treatment of precipitation scavenging and gravitational settling; inclusion of biogenic primary organics and methane sulphonic acid (MSA) from oceans; almost doubled production of land-based biogenic secondary organic aerosols (SOA); and increased ratio of organic matter to organic carbon (OM/OC) for biomass burning aerosols from 1.4 to 2.6. Compared with in situ measurements and remotely sensed data, the new treatments of sea salt and dust aerosols give smaller biases in near-surface mass concentrations and aerosol optical depth than in the earlier model version. The model biases for mass concentrations are approximately unchanged for sulphate and BC. The enhanced levels of modeled OM yield improved overall statistics, even though OM is still underestimated in Europe and overestimated in North America. The global anthropogenic aerosol direct radiative forcing (DRF) at the top of the atmosphere has changed from a small positive value to -0.08 W m-2 in CAM4-Oslo. The sensitivity tests suggest that this change can be attributed to the new treatment of biomass

  13. Aerosol-climate interactions in the Norwegian Earth System Model - NorESM

    Science.gov (United States)

    Kirkevåg, A.; Iversen, T.; Seland, Ø.; Hoose, C.; Kristjánsson, J. E.; Struthers, H.; Ekman, A. M. L.; Ghan, S.; Griesfeller, J.; Nilsson, E. D.; Schulz, M.

    2012-09-01

    The objective of this study is to document and evaluate recent changes and updates to the module for aerosols and aerosol-cloud-radiation interactions in the atmospheric module CAM4-Oslo of the Norwegian Earth System Model (NorESM). Particular attention is paid to the role of natural organics, sea salt, and mineral dust in determining the gross aerosol properties as well as the anthropogenic contribution to these properties and the associated direct and indirect radiative forcing. The aerosol module is extended from earlier versions that have been published, and includes life-cycling of sea-salt, mineral dust, particulate sulphate, black carbon, and primary and secondary organics. The impacts of most of the numerous changes since previous versions are thoroughly explored by sensitivity experiments. The most important changes are: modified prognostic sea salt emissions; updated treatment of precipitation scavenging and gravitational settling; inclusion of biogenic primary organics and methane sulphonic acid (MSA) from oceans; almost doubled production of land-based biogenic secondary organic aerosols (SOA); and increased ratio of organic matter to organic carbon (OM / OC) for biomass burning aerosols from 1.4 to 2.6. Compared with in-situ measurements and remotely sensed data, the new treatments of sea salt and dust aerosols give smaller biases in near surface mass concentrations and aerosol optical depth than in the earlier model version. The model biases for mass concentrations are approximately unchanged for sulphate and BC. The enhanced levels of modeled OM yield improved overall statistics, even though OM is still underestimated in Europe and over-estimated in North America. The global direct radiative forcing (DRF) at the top of the atmosphere has changed from a small positive value to -0.08 W m-2 in CAM4-Oslo. The sensitivity tests suggest that this change can be attributed to the new treatment of biomass burning aerosols and gravitational settling. Although

  14. Aerosol-climate interactions in the Norwegian Earth System Model – NorESM

    Directory of Open Access Journals (Sweden)

    J. Griesfeller

    2012-09-01

    Full Text Available The objective of this study is to document and evaluate recent changes and updates to the module for aerosols and aerosol-cloud-radiation interactions in the atmospheric module CAM4-Oslo of the Norwegian Earth System Model (NorESM. Particular attention is paid to the role of natural organics, sea salt, and mineral dust in determining the gross aerosol properties as well as the anthropogenic contribution to these properties and the associated direct and indirect radiative forcing. The aerosol module is extended from earlier versions that have been published, and includes life-cycling of sea-salt, mineral dust, particulate sulphate, black carbon, and primary and secondary organics. The impacts of most of the numerous changes since previous versions are thoroughly explored by sensitivity experiments. The most important changes are: modified prognostic sea salt emissions; updated treatment of precipitation scavenging and gravitational settling; inclusion of biogenic primary organics and methane sulphonic acid (MSA from oceans; almost doubled production of land-based biogenic secondary organic aerosols (SOA; and increased ratio of organic matter to organic carbon (OM / OC for biomass burning aerosols from 1.4 to 2.6. Compared with in-situ measurements and remotely sensed data, the new treatments of sea salt and dust aerosols give smaller biases in near surface mass concentrations and aerosol optical depth than in the earlier model version. The model biases for mass concentrations are approximately unchanged for sulphate and BC. The enhanced levels of modeled OM yield improved overall statistics, even though OM is still underestimated in Europe and over-estimated in North America. The global direct radiative forcing (DRF at the top of the atmosphere has changed from a small positive value to −0.08 W m−2 in CAM4-Oslo. The sensitivity tests suggest that this change can be attributed to the new treatment of biomass burning aerosols and gravitational

  15. Aerosol–climate interactions in the Norwegian Earth System Model – NorESM1-M

    Directory of Open Access Journals (Sweden)

    A. Kirkevåg

    2013-02-01

    Full Text Available The objective of this study is to document and evaluate recent changes and updates to the module for aerosols and aerosol–cloud–radiation interactions in the atmospheric module CAM4-Oslo of the core version of the Norwegian Earth System Model (NorESM, NorESM1-M. Particular attention is paid to the role of natural organics, sea salt, and mineral dust in determining the gross aerosol properties as well as the anthropogenic contribution to these properties and the associated direct and indirect radiative forcing.

    The aerosol module is extended from earlier versions that have been published, and includes life-cycling of sea salt, mineral dust, particulate sulphate, black carbon, and primary and secondary organics. The impacts of most of the numerous changes since previous versions are thoroughly explored by sensitivity experiments. The most important changes are: modified prognostic sea salt emissions; updated treatment of precipitation scavenging and gravitational settling; inclusion of biogenic primary organics and methane sulphonic acid (MSA from oceans; almost doubled production of land-based biogenic secondary organic aerosols (SOA; and increased ratio of organic matter to organic carbon (OM/OC for biomass burning aerosols from 1.4 to 2.6.

    Compared with in situ measurements and remotely sensed data, the new treatments of sea salt and dust aerosols give smaller biases in near-surface mass concentrations and aerosol optical depth than in the earlier model version. The model biases for mass concentrations are approximately unchanged for sulphate and BC. The enhanced levels of modeled OM yield improved overall statistics, even though OM is still underestimated in Europe and overestimated in North America.

    The global anthropogenic aerosol direct radiative forcing (DRF at the top of the atmosphere has changed from a small positive value to −0.08 W m−2 in CAM4-Oslo. The sensitivity tests suggest that this

  16. Aerosol–climate interactions in the Norwegian Earth System Model – NorESM1-M

    Energy Technology Data Exchange (ETDEWEB)

    Kirkevåg, A.; Iversen, T.; Seland, Ø.; Hoose, C.; Kristjánsson, J. E.; Struthers, H.; Ekman, A. M. L.; Ghan, S.; Griesfeller, J.; Nilsson, E. D.; Schulz, M.

    2013-01-01

    The objective of this study is to document and evaluate recent changes and updates to the module for aerosols and aerosol–cloud–radiation interactions in the atmospheric module CAM4-Oslo of the core version of the Norwegian Earth System Model (NorESM), NorESM1-M. Particular attention is paid to the role of natural organics, sea salt, and mineral dust in determining the gross aerosol properties as well as the anthropogenic contribution to these properties and the associated direct and indirect radiative forcing. The aerosol module is extended from earlier versions that have been published, and includes life-cycling of sea salt, mineral dust, particulate sulphate, black carbon, and primary and secondary organics. The impacts of most of the numerous changes since previous versions are thoroughly explored by sensitivity experiments. The most important changes are: modified prognostic sea salt emissions; updated treatment of precipitation scavenging and gravitational settling; inclusion of biogenic primary organics and methane sulphonic acid (MSA) from oceans; almost doubled production of land-based biogenic secondary organic aerosols (SOA); and increased ratio of organic matter to organic carbon (OM/OC) for biomass burning aerosols from 1.4 to 2.6. Compared with in situ measurements and remotely sensed data, the new treatments of sea salt and dust aerosols give smaller biases in near-surface mass concentrations and aerosol optical depth than in the earlier model version. The model biases for mass concentrations are approximately unchanged for sulphate and BC. The enhanced levels of modeled OM yield improved overall statistics, even though OM is still underestimated in Europe and overestimated in North America. The global anthropogenic aerosol direct radiative forcing (DRF) at the top of the atmosphere has changed from a small positive value to -0.08 W m-2 in CAM4-Oslo. The sensitivity tests suggest that this change can be attributed to the new treatment of biomass

  17. Solar Desalination System Model for Sizing of Photovoltaic Reverse Osmosis (PVRO)

    KAUST Repository

    Habib, Abdulelah

    2015-06-28

    The focus of this paper is to optimize the solar energy utilization in the water desalination process. Due to variable nature of solar energy, new system design is needed to address this challenge. Here, reverse osmosis units, as the electrical loads, are considered as an ON/OFF units to track these solar energy variations. Reverse osmosis units are different in sizes and numbers. Various combinations of reverse osmosis units in size and capacity provide different water desalination system performances. To assess each scenario of reverse osmosis units, the total capital cost and operation and maintenance (O&M) cost are considered. The implemented optimization algorithm search all of the possible scenarios to find the best solution. This paper deploys the solar irradiance data which is provided from west coast (Red Sea) of Saudi Arabia for model construction and optimization algorithm implementation.

  18. Cotangent Models for Integrable Systems

    Science.gov (United States)

    Kiesenhofer, Anna; Miranda, Eva

    2017-03-01

    We associate cotangent models to a neighbourhood of a Liouville torus in symplectic and Poisson manifolds focusing on b-Poisson/ b-symplectic manifolds. The semilocal equivalence with such models uses the corresponding action-angle theorems in these settings: the theorem of Liouville-Mineur-Arnold for symplectic manifolds and an action-angle theorem for regular Liouville tori in Poisson manifolds (Laurent- Gengoux et al., IntMath Res Notices IMRN 8: 1839-1869, 2011). Our models comprise regular Liouville tori of Poisson manifolds but also consider the Liouville tori on the singular locus of a b-Poisson manifold. For this latter class of Poisson structures we define a twisted cotangent model. The equivalence with this twisted cotangent model is given by an action-angle theorem recently proved by the authors and Scott (Math. Pures Appl. (9) 105(1):66-85, 2016). This viewpoint of cotangent models provides a new machinery to construct examples of integrable systems, which are especially valuable in the b-symplectic case where not many sources of examples are known. At the end of the paper we introduce non-degenerate singularities as lifted cotangent models on b-symplectic manifolds and discuss some generalizations of these models to general Poisson manifolds.

  19. Spatially-Distributed Stream Flow and Nutrient Dynamics Simulations Using the Component-Based AgroEcoSystem-Watershed (AgES-W) Model

    Science.gov (United States)

    Ascough, J. C.; David, O.; Heathman, G. C.; Smith, D. R.; Green, T. R.; Krause, P.; Kipka, H.; Fink, M.

    2010-12-01

    The Object Modeling System 3 (OMS3), currently being developed by the USDA-ARS Agricultural Systems Research Unit and Colorado State University (Fort Collins, CO), provides a component-based environmental modeling framework which allows the implementation of single- or multi-process modules that can be developed and applied as custom-tailored model configurations. OMS3 as a “lightweight” modeling framework contains four primary foundations: modeling resources (e.g., components) annotated with modeling metadata; domain specific knowledge bases and ontologies; tools for calibration, sensitivity analysis, and model optimization; and methods for model integration and performance scalability. The core is able to manage modeling resources and development tools for model and simulation creation, execution, evaluation, and documentation. OMS3 is based on the Java platform but is highly interoperable with C, C++, and FORTRAN on all major operating systems and architectures. The ARS Conservation Effects Assessment Project (CEAP) Watershed Assessment Study (WAS) Project Plan provides detailed descriptions of ongoing research studies at 14 benchmark watersheds in the United States. In order to satisfy the requirements of CEAP WAS Objective 5 (“develop and verify regional watershed models that quantify environmental outcomes of conservation practices in major agricultural regions”), a new watershed model development approach was initiated to take advantage of OMS3 modeling framework capabilities. Specific objectives of this study were to: 1) disaggregate and refactor various agroecosystem models (e.g., J2K-S, SWAT, WEPP) and implement hydrological, N dynamics, and crop growth science components under OMS3, 2) assemble a new modular watershed scale model for fully-distributed transfer of water and N loading between land units and stream channels, and 3) evaluate the accuracy and applicability of the modular watershed model for estimating stream flow and N dynamics. The

  20. INTEGRATED HYDROGEN STORAGE SYSTEM MODEL

    Energy Technology Data Exchange (ETDEWEB)

    Hardy, B

    2007-11-16

    Hydrogen storage is recognized as a key technical hurdle that must be overcome for the realization of hydrogen powered vehicles. Metal hydrides and their doped variants have shown great promise as a storage material and significant advances have been made with this technology. In any practical storage system the rate of H2 uptake will be governed by all processes that affect the rate of mass transport through the bed and into the particles. These coupled processes include heat and mass transfer as well as chemical kinetics and equilibrium. However, with few exceptions, studies of metal hydrides have focused primarily on fundamental properties associated with hydrogen storage capacity and kinetics. A full understanding of the complex interplay of physical processes that occur during the charging and discharging of a practical storage system requires models that integrate the salient phenomena. For example, in the case of sodium alanate, the size of NaAlH4 crystals is on the order of 300nm and the size of polycrystalline particles may be approximately 10 times larger ({approx}3,000nm). For the bed volume to be as small as possible, it is necessary to densely pack the hydride particles. Even so, in packed beds composed of NaAlH{sub 4} particles alone, it has been observed that the void fraction is still approximately 50-60%. Because of the large void fraction and particle to particle thermal contact resistance, the thermal conductivity of the hydride is very low, on the order of 0.2 W/m-{sup o}C, Gross, Majzoub, Thomas and Sandrock [2002]. The chemical reaction for hydrogen loading is exothermic. Based on the data in Gross [2003], on the order of 10{sup 8}J of heat of is released for the uptake of 5 kg of H{sub 2}2 and complete conversion of NaH to NaAlH{sub 4}. Since the hydride reaction transitions from hydrogen loading to discharge at elevated temperatures, it is essential to control the temperature of the bed. However, the low thermal conductivity of the hydride

  1. Probabilistic models for feedback systems.

    Energy Technology Data Exchange (ETDEWEB)

    Grace, Matthew D.; Boggs, Paul T.

    2011-02-01

    In previous work, we developed a Bayesian-based methodology to analyze the reliability of hierarchical systems. The output of the procedure is a statistical distribution of the reliability, thus allowing many questions to be answered. The principal advantage of the approach is that along with an estimate of the reliability, we also can provide statements of confidence in the results. The model is quite general in that it allows general representations of all of the distributions involved, it incorporates prior knowledge into the models, it allows errors in the 'engineered' nodes of a system to be determined by the data, and leads to the ability to determine optimal testing strategies. In this report, we provide the preliminary steps necessary to extend this approach to systems with feedback. Feedback is an essential component of 'complexity' and provides interesting challenges in modeling the time-dependent action of a feedback loop. We provide a mechanism for doing this and analyze a simple case. We then consider some extensions to more interesting examples with local control affecting the entire system. Finally, a discussion of the status of the research is also included.

  2. Modeling Advance Life Support Systems

    Science.gov (United States)

    Pitts, Marvin; Sager, John; Loader, Coleen; Drysdale, Alan

    1996-01-01

    Activities this summer consisted of two projects that involved computer simulation of bioregenerative life support systems for space habitats. Students in the Space Life Science Training Program (SLSTP) used the simulation, space station, to learn about relationships between humans, fish, plants, and microorganisms in a closed environment. One student complete a six week project to modify the simulation by converting the microbes from anaerobic to aerobic, and then balancing the simulation's life support system. A detailed computer simulation of a closed lunar station using bioregenerative life support was attempted, but there was not enough known about system restraints and constants in plant growth, bioreactor design for space habitats and food preparation to develop an integrated model with any confidence. Instead of a completed detailed model with broad assumptions concerning the unknown system parameters, a framework for an integrated model was outlined and work begun on plant and bioreactor simulations. The NASA sponsors and the summer Fell were satisfied with the progress made during the 10 weeks, and we have planned future cooperative work.

  3. Minisuperspace models of discrete systems

    CERN Document Server

    Baytaş, Bekir

    2016-01-01

    A discrete quantum spin system is presented in which several modern methods of canonical quantum gravity can be tested with promising results. In particular, features of interacting dynamics are analyzed with an emphasis on homogeneous configurations and the dynamical building-up and stability of long-range correlations. Different types of homogeneous minisuperspace models are introduced for the system, including one based on condensate states, and shown to capture different aspects of the discrete system. They are evaluated with effective methods and by means of continuum limits, showing good agreement with operator calculations whenever the latter are available. As a possibly quite general result, it is concluded that an analysis of the building-up of long-range correlations in discrete systems requires non-perturbative solutions of the dynamical equations. Some questions related to stability can be analyzed perturbatively, but suggest that matter couplings may be relevant for this question in the context o...

  4. Utredning om CO2-opptak i marine naturtyper

    OpenAIRE

    Gundersen, H.; Christie, H.; de Wit, H; Norderhaug, K.; Bekkby, T.; Walday, M.

    2011-01-01

    Betydningen av marine naturtyper i å binde og pumpe CO2 fra atmosfæren og ned i havbunnen langs norskekysten er sannsynligvis stor. Rapporten sammenfatter dagens kunnskap om stående biomasse og potensial for ytterligere binding for sukkertare, stortare, tang og ålegras. Karbon lagres ved deponering av overskuddsproduksjon i sedimentene, og denne mengden kan økes ved potensiell økt utbredelse av tareskog som skyldes tilbakegang av kråkebolleutbredelsen og endrede eutrofi-/klimaforhold. Betydni...

  5. Tidal Forces in Reissner-Nordstr\\"om Spacetimes

    CERN Document Server

    Crispino, Luís C B; Oliveira, Leandro A; de Oliveira, Ednilton S

    2016-01-01

    We analyze the tidal forces produced in the spacetime of Reissner-Nordstr\\"om black holes. We point out that the radial component of the tidal force changes sign just outside the event horizon if the charge-to-mass ratio is close to $1$ unlike in Schwarzschild spacetime of uncharged black holes, and that the angular component changes sign between the outer and inner horizons. We solve the geodesic deviation equations for radially falling bodies towards the charged black hole. We find, for example, that the radial component of the geodesic deviation vector starts decreasing inside the event horizon unlike in the Schwarzschild case.

  6. Læring i videnssamfundet - Om vidensformidling, videnskonstruktion og vidensdeling

    Directory of Open Access Journals (Sweden)

    Jørgen Bang

    2010-10-01

    Full Text Available Denne antologi fremlægger resultaterne fra forskningsprojektet Videnskonstruktion, vidensdeling og vidensformidling i videnssamfundets uddannelsessystem under Det Humanistiske Fakultets satsningsområde Videnssamfundet. Artiklerne er skrevet af forskere ved Aarhus Universitet samt af forskere udefra, som har deltaget i projektet med oplæg dels på seminarer og workshops afholdt af Center for IT ved Institut for informations- og medievidenskab, Aarhus Universitet, dels på den afsluttende konference om "Knowledge Media", Aarhus Universitet (Januar 19-20, 2009.

  7. Diagnostic of $f(R)$ under the $Om(z)$ function

    CERN Document Server

    Jaime, Luisa G

    2015-01-01

    We perform the two$-$point diagnostic for the $Om(z)$ function proposed by Sahni ${\\it et al}$ in 2014 for the Starobinsky and Hu & Sawicki models in $f(R)$ gravity. We show that the observed values of the $Omh^2$ function can be explained in $f(R)$ models while in LCDM the $Omh^2$ funticon is expected to be a redshift independent number. We perform the analysis for some particular values of $\\Omega_m^0$ founding a cumulative probability ($P(\\chi^2 \\leq \\chi^2_{{\\it model}})$) $P \\sim 0.16$ or $\\sim0.09$ for the better cases versus a cumulative probability of $P \\sim 0.98$ in the $\\Lambda$CDM scenario. We also show that these models present a characteristic signature around the interval between $z\\sim 2$ and $z\\sim 4$, that could be confronted with future observations using the same test.

  8. The Control System Modeling Language

    CERN Document Server

    Zagar, K; Sekoranja, M; Tkacik, G; Vodovnik, A; Zagar, Klemen; Plesko, Mark; Sekoranja, Matej; Tkacik, Gasper; Vodovnik, Anze

    2001-01-01

    The well-known Unified Modeling Language (UML) describes software entities, such as interfaces, classes, operations and attributes, as well as relationships among them, e.g. inheritance, containment and dependency. The power of UML lies in Computer Aided Software Engineering (CASE) tools such as Rational Rose, which are also capable of generating software structures from visual object definitions and relations. UML also allows add-ons that define specific structures and patterns in order to steer and automate the design process. We have developed an add-on called Control System Modeling Language (CSML). It introduces entities and relationships that we know from control systems, such as "property" representing a single controllable point/channel, or an "event" specifying that a device is capable of notifying its clients through events. Entities can also possess CSML-specific characteristics, such as physical units and valid ranges for input parameters. CSML is independent of any specific language or technology...

  9. Contextual Modelling of Collaboration System

    Directory of Open Access Journals (Sweden)

    Wafaa DACHRY

    2012-03-01

    Full Text Available Faced with new environmental constraints, firms decide to collaborate in collective entities and adopt new patterns of behavior. So, this firms’ collaboration becomes an unavoidable approach. Indeed, our aim interest in our study is to propose a collaborative information system for supply chain. Our proposed platform ensures cooperation and information sharing between partners in real time. In fact, several questions have to be asked: What is the information nature may be shared between partners? What processes are implemented between actors? What functional services are supported by the platform? In order to answer these questions, we present, in this article, our methodological approach of modelling, called CMCS (Contextual Modelling of Collaborative System

  10. Stochastic Models of Polymer Systems

    Science.gov (United States)

    2016-01-01

    field limit of a dynamical model for polymer systems, Science China Mathematics , (11 2012): 0. doi: TOTAL: 1 Number of Non Peer-Reviewed Conference...4.0 (4.0 max scale): Number of graduating undergraduates funded by a DoD funded Center of Excellence grant for Education , Research and Engineering...undergraduates funded by your agreement who graduated during this period and will receive scholarships or fellowships for further studies in science

  11. Model reduction of parametrized systems

    CERN Document Server

    Ohlberger, Mario; Patera, Anthony; Rozza, Gianluigi; Urban, Karsten

    2017-01-01

    The special volume offers a global guide to new concepts and approaches concerning the following topics: reduced basis methods, proper orthogonal decomposition, proper generalized decomposition, approximation theory related to model reduction, learning theory and compressed sensing, stochastic and high-dimensional problems, system-theoretic methods, nonlinear model reduction, reduction of coupled problems/multiphysics, optimization and optimal control, state estimation and control, reduced order models and domain decomposition methods, Krylov-subspace and interpolatory methods, and applications to real industrial and complex problems. The book represents the state of the art in the development of reduced order methods. It contains contributions from internationally respected experts, guaranteeing a wide range of expertise and topics. Further, it reflects an important effor t, carried out over the last 12 years, to build a growing research community in this field. Though not a textbook, some of the chapters ca...

  12. Computational models of complex systems

    CERN Document Server

    Dabbaghian, Vahid

    2014-01-01

    Computational and mathematical models provide us with the opportunities to investigate the complexities of real world problems. They allow us to apply our best analytical methods to define problems in a clearly mathematical manner and exhaustively test our solutions before committing expensive resources. This is made possible by assuming parameter(s) in a bounded environment, allowing for controllable experimentation, not always possible in live scenarios. For example, simulation of computational models allows the testing of theories in a manner that is both fundamentally deductive and experimental in nature. The main ingredients for such research ideas come from multiple disciplines and the importance of interdisciplinary research is well recognized by the scientific community. This book provides a window to the novel endeavours of the research communities to present their works by highlighting the value of computational modelling as a research tool when investigating complex systems. We hope that the reader...

  13. Lidt om DØRS' selvforståelse: om lønrelationerne i SMEC

    DEFF Research Database (Denmark)

    Harck, Søren H.

    1997-01-01

    at all: if the wage-to-price elasticity is taken to be equal to one (as stipulated by DØRS), the model turns out to imply, even in the long run, an old-fashioned, stable Phillips curve; and if, more realistically, this elasticity is taken to be smaller than one, the error-correction specification by DØRS...

  14. Identification and Modelling of Linear Dynamic Systems

    Directory of Open Access Journals (Sweden)

    Stanislav Kocur

    2006-01-01

    Full Text Available System identification and modelling are very important parts of system control theory. System control is only as good as good is created model of system. So this article deals with identification and modelling problems. There are simple classification and evolution of identification methods, and then the modelling problem is described. Rest of paper is devoted to two most known and used models of linear dynamic systems.

  15. Erfaringer fra undervisning om diagnostik på en masteruddannelse

    DEFF Research Database (Denmark)

    Hildebrandt, Malene

    Læringsmål Opnåelse af: • Teoretisk viden om og forståelse for diagnostiske begreber • Kompetencer til kritisk vurdering af diagnostisk videnskabelig litteratur Prøveformer Prøveformen var bygget op som en portfolio med aktiviteter på Diskussionsforum (DF) og Blackboard (BB) og bestod af følgende...... gruppearbejdet fra undervisningen, hvor der blev anvendt strukturerede tjeklister, som bidrog til at konkretisere læringsmålene. Feedbackaktivitet på DF Studerende fra den ene gruppe blev parret med studerende fra den anden gruppe, således at alle skulle give og modtage feedback til/fra en medstuderende....... Formålet var, at alle skulle give og modtage relevant kritik og feedback. I gruppearbejdet undervejs blev der også arbejdet med feedback. MCQ på BB Denne bestod af en række spørgsmål, dels teoretiske og dels eksempler fra artikler og undervisning. Formålet var at afprøve de studerendes viden om...

  16. Acides gras oméga-3 et dyslexie

    Science.gov (United States)

    Zelcer, Michal; Goldman, Ran D.

    2015-01-01

    Résumé Question À la lumière de la hausse du nombre d’enfants d’âge scolaire ayant reçu un diagnostic de dyslexie, quel est le rôle des suppléments d’acides gras oméga-3 dans la prise en charge de cette affection? Réponse La dyslexie est le trouble d’apprentissage le plus répandu et elle est connue pour ses causes multifactorielles. De récentes données probantes pointent vers une corrélation entre le métabolisme défectueux des acides gras polyinsaturés et les troubles de neurodéveloppement, tels que la dyslexie. Bien que l’administration de suppléments d’acides gras oméga-3 aux enfants dyslexiques ait fait l’objet d’études, les données probantes sont limitées. Les critères diagnostiques homogènes de dyslexie, les mesures objectives de carence en acides gras et la surveillance étroite de l’apport alimentaire ne sont que quelques-uns des facteurs pouvant améliorer la qualité de la recherche dans ce domaine.

  17. Feeding pattern a dual risk? otitis media (OM and early childhood caries (ECC

    Directory of Open Access Journals (Sweden)

    P. Sangeetha

    2014-04-01

    Full Text Available Purpose: To determine the prevalence of Otitis media (OM and Early childhood caries (ECC and their coexistence in children with a history of faulty feeding patterns. Method: Children aged 5 years and below were recruited at random from dental and medical hospitals. Parents of these children were posed with questions about the feeding methods, feeding patterns such as duration, frequency, position, burping, specific childhood illness etc. Children (120 were examined for ECC by a Paedodontist and OM by an Otolaryngologist and were segregated into three groups i.e. Control group, ECC group and OM group respectively. The ECC group was sub grouped into ECC only and ECC&OM group. The OM group was also similarly sub grouped into OM group and OM&ECC group. Collected data were tabulated and subjected for statistical analysis using Pearson Chi – square test. Results: Prevalence of ECC, OM, and their coexistence increased with age P < 0.001, whereas gender difference was not statistically significant. Overall Prevalence of their coexistence in children was 51.25%. Significant percentages (25% of children in the OM group were fed in supine position. Children fed on demand (47.5% experienced ECC. overall 85% (p=.017 of children had coexistence of ECC&OM fed on demand and during bed time. Significant numbers of children who were burped occasionally after feeding (35% or were not burped at all (12.5% were affected with both ECC and OM. Conclusion: Prevalence of their coexistence was higher in children with OM. Significant association existed between on demand feeding and ECC; supine feeding position and OM. Risk factors in common for both the disease were combined feeding position, on demand, bed time feeding and occasionally burping.

  18. Het recht om relaties aan te gaan en te ontwikkelen : uitgangspunt voor rechtsvergelijking inzake (homo-)seksuele gerichtheid

    NARCIS (Netherlands)

    Waaldijk, C.

    2013-01-01

    In het (vergelijkende) seksuelegerichtheidsrecht gaat het steeds om gerichtheid op anderen - ongeacht geslacht. Deze oratie betoogt dat ‘the right to relate' hierbij het uitgangspunt kan zijn. Dit recht om relaties aan te gaan en te ontwikkelen impliceert een recht om uit de kast te komen en om same

  19. Effects of management and pore characteristics on organic matter composition of macroaggregates: evidence from characterization of organic matter and imaging: Pore characteristics and OM composition of macroaggregates

    Energy Technology Data Exchange (ETDEWEB)

    Toosi, E. R. [Department of Plant, Soil and Microbial Sciences, Michigan State University, 1066 Bogue St., East Lansing MI 48823 USA; Kravchenko, A. N. [Department of Plant, Soil and Microbial Sciences, Michigan State University, 1066 Bogue St., East Lansing MI 48823 USA; Mao, J. [Department of Chemistry and Biochemistry, Old Dominion University, 4541 Hampton Blvd, Norfolk VA 23529 USA; Quigley, M. Y. [Department of Plant, Soil and Microbial Sciences, Michigan State University, 1066 Bogue St., East Lansing MI 48823 USA; Rivers, M. L. [Center for Advanced Radiation Sources, Argonne National Laboratory, The University of Chicago, 9700 South Cass Ave., Argonne IL 60439 USA

    2017-02-07

    Macroaggregates are of interest because of their fast response to land management and their role in the loss or restoration of soil organic carbon (SOC). The study included two experiments. In Experiment I, we investigated the effect of long-term (27 years) land management on the chemical composition of organic matter (OM) of macroaggregates. Macroaggregates were sampled from topsoil under conventional cropping, cover cropping and natural succession systems. The OM of macroaggregates from conventional cropping was more decomposed than that of cover cropping and especially natural succession, based on larger δ15N values and decomposition indices determined by multiple magic-angle spinning nuclear magnetic resonance (13C CP/MAS NMR) and Fourier transform infrared (FTIR) spectroscopy. Previous research at the sites studied suggested that this was mainly because of reduced diversity and activity of the decomposer community, change in nutrient stoichiometry from fertilization and contrasting formation pathways of macroaggregates in conventional cropping compared with cover cropping and, specifically, natural succession. In Experiment II, we investigated the relation between OM composition and pore characteristics of macroaggregates. Macroaggregates from the natural succession system only were studied. We determined 3-D pore-size distribution of macroaggregates with X-ray microtomography, for which we cut the macroaggregates into sections that had contrasting dominant pore sizes. Then, we characterized the OM of macroaggregate sections with FTIR and δ15N methods. The results showed that within a macroaggregate, the OM was less decomposed in areas where the small (13–32 µm) or large (136–260 µm) pores were abundant. This was attributed to the role of large pores in supplying fresh OM and small pores in the effective protection of OM in macroaggregates. Previous research at the site studied had shown increased abundance of large and small

  20. ISSM: Ice Sheet System Model

    Science.gov (United States)

    Larour, Eric; Schiermeier, John E.; Seroussi, Helene; Morlinghem, Mathieu

    2013-01-01

    In order to have the capability to use satellite data from its own missions to inform future sea-level rise projections, JPL needed a full-fledged ice-sheet/iceshelf flow model, capable of modeling the mass balance of Antarctica and Greenland into the near future. ISSM was developed with such a goal in mind, as a massively parallelized, multi-purpose finite-element framework dedicated to ice-sheet modeling. ISSM features unstructured meshes (Tria in 2D, and Penta in 3D) along with corresponding finite elements for both types of meshes. Each finite element can carry out diagnostic, prognostic, transient, thermal 3D, surface, and bed slope simulations. Anisotropic meshing enables adaptation of meshes to a certain metric, and the 2D Shelfy-Stream, 3D Blatter/Pattyn, and 3D Full-Stokes formulations capture the bulk of the ice-flow physics. These elements can be coupled together, based on the Arlequin method, so that on a large scale model such as Antarctica, each type of finite element is used in the most efficient manner. For each finite element referenced above, ISSM implements an adjoint. This adjoint can be used to carry out model inversions of unknown model parameters, typically ice rheology and basal drag at the ice/bedrock interface, using a metric such as the observed InSAR surface velocity. This data assimilation capability is crucial to allow spinning up of ice flow models using available satellite data. ISSM relies on the PETSc library for its vectors, matrices, and solvers. This allows ISSM to run efficiently on any parallel platform, whether shared or distrib- ISSM: Ice Sheet System Model NASA's Jet Propulsion Laboratory, Pasadena, California uted. It can run on the largest clusters, and is fully scalable. This allows ISSM to tackle models the size of continents. ISSM is embedded into MATLAB and Python, both open scientific platforms. This improves its outreach within the science community. It is entirely written in C/C++, which gives it flexibility in its

  1. Integrated Modeling for Flood Hazard Mapping Using Watershed Modeling System

    National Research Council Canada - National Science Library

    Seyedeh S. Sadrolashrafi; Thamer A. Mohamed; Ahmad R.B. Mahmud; Majid K. Kholghi; Amir Samadi

    2008-01-01

    ...) with the Watershed Modeling System (WMS) for flood modeling is developed. It also interconnects the terrain models and the GIS software, with commercial standard hydrological and hydraulic models, including HEC-1, HEC-RAS, etc...

  2. Proof of linear instability of the Reissner-Nordstr\\"om Cauchy horizon under scalar perturbations

    CERN Document Server

    Luk, Jonathan

    2015-01-01

    It has long been suggested that solutions to linear scalar wave equation $$\\Box_g\\phi=0$$ on a fixed subextremal Reissner-Nordstr\\"om spacetime with non-vanishing charge are generically singular at the Cauchy horizon. We prove that generic smooth and compactly supported initial data on a Cauchy hypersurface indeed give rise to solutions with infinite nondegenerate energy near the Cauchy horizon in the interior of the black hole. In particular, the solution generically does not belong to $W^{1,2}_{loc}$. This instability is related to the celebrated blue shift effect in the interior of the black hole. The problem is motivated by the strong cosmic censorship conjecture and it is expected that for the full nonlinear Einstein-Maxwell system, this instability leads to a singular Cauchy horizon for generic small perturbations of Reissner-Nordstr\\"om spacetime. Moreover, in addition to the instability result, we also show as a consequence of the proof that Price's law decay is generically sharp along the event horiz...

  3. Lidt om DØRS' selvforståelse: om lønrelationerne i SMEC

    DEFF Research Database (Denmark)

    Harck, Søren H.

    1997-01-01

    at all: if the wage-to-price elasticity is taken to be equal to one (as stipulated by DØRS), the model turns out to imply, even in the long run, an old-fashioned, stable Phillips curve; and if, more realistically, this elasticity is taken to be smaller than one, the error-correction specification by DØRS...... does in fact entail a horizontal Phillips curve, the level of which is determined by the exchange rate adjusted foreign inflation rate. Evidently, the policy implications of getting the interpretation right are, potentially, huge....

  4. Network models in anatomical systems.

    Science.gov (United States)

    Esteve-Altava, Borja; Marugán-Lobón, Jesús; Botella, Héctor; Rasskin-Gutman, Diego

    2011-01-01

    Network theory has been extensively used to model the underlying structure of biological processes. From genetics to ecology, network thinking is changing our understanding of complex systems, specifically how their internal structure determines their overall behavior. Concepts such as hubs, scale-free or small-world networks, common in the complexity literature, are now used more and more in sociology, neurosciences, as well as other anthropological fields. Even though the use of network models is nowadays so widely applied, few attempts have been carried out to enrich our understanding in the classical morphological sciences such as in comparative anatomy or physical anthropology. The purpose of this article is to introduce the usage of network tools in morphology; specifically by building anatomical networks, dealing with the most common analyses and problems, and interpreting their outcome.

  5. Thermodynamic modeling of complex systems

    DEFF Research Database (Denmark)

    Liang, Xiaodong

    Offshore reservoirs represent one of the major growth areas of the oil and gas industry, and environmental safety is one of the biggest challenges for the offshore exploration and production. The oil accidents in the Gulf of Mexico in 1979 and 2010 were two of the biggest disasters in history...... after an oil spill. Engineering thermodynamics could be applied in the state-of-the-art sonar products through advanced artificial technology, if the speed of sound, solubility and density of oil-seawater systems could be satisfactorily modelled. The addition of methanol or glycols into unprocessed well...

  6. Models for Gaze Tracking Systems

    Directory of Open Access Journals (Sweden)

    Villanueva Arantxa

    2007-01-01

    Full Text Available One of the most confusing aspects that one meets when introducing oneself into gaze tracking technology is the wide variety, in terms of hardware equipment, of available systems that provide solutions to the same matter, that is, determining the point the subject is looking at. The calibration process permits generally adjusting nonintrusive trackers based on quite different hardware and image features to the subject. The negative aspect of this simple procedure is that it permits the system to work properly but at the expense of a lack of control over the intrinsic behavior of the tracker. The objective of the presented article is to overcome this obstacle to explore more deeply the elements of a video-oculographic system, that is, eye, camera, lighting, and so forth, from a purely mathematical and geometrical point of view. The main contribution is to find out the minimum number of hardware elements and image features that are needed to determine the point the subject is looking at. A model has been constructed based on pupil contour and multiple lighting, and successfully tested with real subjects. On the other hand, theoretical aspects of video-oculographic systems have been thoroughly reviewed in order to build a theoretical basis for further studies.

  7. Models for Gaze Tracking Systems

    Directory of Open Access Journals (Sweden)

    Arantxa Villanueva

    2007-10-01

    Full Text Available One of the most confusing aspects that one meets when introducing oneself into gaze tracking technology is the wide variety, in terms of hardware equipment, of available systems that provide solutions to the same matter, that is, determining the point the subject is looking at. The calibration process permits generally adjusting nonintrusive trackers based on quite different hardware and image features to the subject. The negative aspect of this simple procedure is that it permits the system to work properly but at the expense of a lack of control over the intrinsic behavior of the tracker. The objective of the presented article is to overcome this obstacle to explore more deeply the elements of a video-oculographic system, that is, eye, camera, lighting, and so forth, from a purely mathematical and geometrical point of view. The main contribution is to find out the minimum number of hardware elements and image features that are needed to determine the point the subject is looking at. A model has been constructed based on pupil contour and multiple lighting, and successfully tested with real subjects. On the other hand, theoretical aspects of video-oculographic systems have been thoroughly reviewed in order to build a theoretical basis for further studies.

  8. A FIELD CONTROL TRIAL OF CULEX QUINQUEFASCIATUS LARVAE BY POLYMER FORMULATIONS OF OMS-786 AND OMS-971 IN JAKARTA

    Directory of Open Access Journals (Sweden)

    IG. Seregeg

    2012-09-01

    Full Text Available Suatu uji coba lapangan penggunaan larvisida OMS-971a (chlorpyrifos dan OMS-786b (temephos dalam formulasi lepas terkendali (controlled release formulation = CRF terhadap larva Culex quinquefasciatus telah dilakukan dalam selokan-selokan di Kampung Sunter, Jakarta Utara. Tidak ada penurunan yang nyata baik kerapatan larva maupun kerapatan pupa, segera setelah penebaran larvisida tersebut dalam dosis 1 ppm. Akan tetapi penurunan kerapatan larva baru terlihat selama satu sampai dua bulan sesudah penebaran. Pada penelitian ini chlorpyrifos terlihat sedikit lebih berpengaruh (effective dibandingkan dengan temephos. Pengaruh dari temephos" sa'nd granules" sebagai formulasi pem­banding hanya berlangsung paling lama satu minggu, pada penggunaan dosis sebesar lppm. Keadaan dasar selokan dengan endapan lumpur yang tebal diperkirakan telah melumpuhkan daya kerja temephos SG, yang langsung tenggelam ke dasar selokan setelah penebaran. Hal ini berbeda dengan formulasi chlorpyrifos dan temephos yang bersifat lepas terkendali (CRF, berada dalam suatu keadaan yang tetap mengapung di atas permukaan air. Chlorpyrifos dapat memberikan daya kendali terhadap larva sebesar 70 - 94% pada minggu ke 5-8 dan terhadap pupa sebesar 87% pada minggu ke 6 dan 92% pada minggu ke 7. Temephos CRF memberikan daya kendali terhadap larva sebesar 90-96 % pada minggu ke 4-8 dan menurun menjadi 75-96% pada minggu ke 8-9.

  9. Area Logistics System Based on System Dynamics Model

    Institute of Scientific and Technical Information of China (English)

    GUI Shouping; ZHU Qiang; LU Lifang

    2005-01-01

    At present, there are few effective ways to analyze area logistics systems. This paper uses system dynamics to analyze the area logistics system and establishes a system dynamics model for the area logistics system based on the characteristics of the area logistics system and system dynamics. Numerical simulations with the system dynamic model were used to analyze a logistic system. Analysis of the Guangzhou economy shows that the model can reflect the actual state of the system objectively and can be used to make policy and harmonize environment.

  10. Enterprise Modelling supported by Manufacturing Systems Theory

    OpenAIRE

    MYKLEBUST, Odd

    2002-01-01

    There exist today a large number of enterprise models or enterprise modelling approaches. In a study of standards and project developed models there are two approaches: CIMOSA “The Open Systems Architecture for CIM” and GERAM, “Generalised Enterprise Reference Architecture”, which show a system orientation that can be further followed as interesting research topics for a system theory oriented approach for enterprise models. In the selection of system theories, manufacturing system theory...

  11. 20 CFR 229.68 - Reduction of DIB O/M.

    Science.gov (United States)

    2010-04-01

    ... 20 Employees' Benefits 1 2010-04-01 2010-04-01 false Reduction of DIB O/M. 229.68 Section 229.68..., State, or Local Law or Plan § 229.68 Reduction of DIB O/M. A reduction for entitlement to worker's compensation or a public disability benefit is applied after the DIB O/M is reduced for age and the...

  12. O&M Best Practices - A Guide to Achieving Operational Efficiency (Release 2.0)

    Energy Technology Data Exchange (ETDEWEB)

    Sullivan, Gregory P.; Pugh, Ray; Melendez, Aldo P.; Hunt, W. D.

    2004-07-31

    This guide, sponsored by DOE's Federal Energy Management Program, highlights operations and maintenance (O&M) programs targeting energy efficiency that are estimated to save 5% to 20% on energy bills without a significant capital investment. The purpose of this guide is to provide the federal O&M energy manager and practitioner with useful information about O&M management, technologies, energy efficiency and cost-reduction approaches.

  13. Modeling learning technology systems as business systems

    NARCIS (Netherlands)

    Avgeriou, Paris; Retalis, Symeon; Papaspyrou, Nikolaos

    2003-01-01

    The design of Learning Technology Systems, and the Software Systems that support them, is largely conducted on an intuitive, ad hoc basis, thus resulting in inefficient systems that defectively support the learning process. There is now justifiable, increasing effort in formalizing the engineering o

  14. Modeling learning technology systems as business systems

    NARCIS (Netherlands)

    Avgeriou, Paris; Retalis, Symeon; Papaspyrou, Nikolaos

    2003-01-01

    The design of Learning Technology Systems, and the Software Systems that support them, is largely conducted on an intuitive, ad hoc basis, thus resulting in inefficient systems that defectively support the learning process. There is now justifiable, increasing effort in formalizing the engineering

  15. Cosmological reconstruction and {\\it Om} diagnostic analysis of Einstein-Aether Theory

    CERN Document Server

    Pasqua, Antonio; Momeni, Davood; Raza, Muhammad; Myrzakulov, Ratbay

    2015-01-01

    Cosmological reconstruction technique is applied to study the cosmology of the Einstein-Aether (EA) gravity. We reconstructed an analytical model of EA theory for a type of Hubble dependent dark energy density proposed by Granda and Oliveros. The reconstructed cosmological scale factors are comprised of power-law, future singular model, emergent scale factor, intermediate scale factor, a unified theory for matter and dark energy dominated phases and finally for a type of non-extensive exponential scale factor, the q-de Sitter scale factor. In each cosmological epoch, we reconstruct the Lagrangian of the vector part of theory $F(K)$. Furthermore, \\emph{Om} diagnostic analysis technique is applied to fit parameters using recent observational data, namely Type Ia Supernovae, BAO, and data of Hubble parameter.

  16. Nonlinear System Identification and Behavioral Modeling

    CERN Document Server

    Huq, Kazi Mohammed Saidul; Kabir, A F M Sultanul

    2010-01-01

    The problem of determining a mathematical model for an unknown system by observing its input-output data pair is generally referred to as system identification. A behavioral model reproduces the required behavior of the original analyzed system, such as there is a one-to-one correspondence between the behavior of the original system and the simulated system. This paper presents nonlinear system identification and behavioral modeling using a work assignment.

  17. A View of Earth System Model Development

    Institute of Scientific and Technical Information of China (English)

    ZHOU Tianjun; YU Yongqiang; WANG Bin

    2009-01-01

    This paper gives a definition of earth system model and shows three development phases of it, including physical climate system model, earth climate system model, and earth system model, based on an inves-tigation of climate system models in the world. It provides an expatiation on the strategic significance of future development of earth system model, an introduction of some representative scientific research plans on development of earth system model home and abroad, and a review of its status and trends based on the models of the fourth assessment report (AR4) of the Intergovernmental Panel on Climate Change (IPCC).Some suggestions on future development of earth system model in China are given, which are expected to be helpful to advance the development.

  18. Professor håber på åbenhed om CRISPR/Cas9

    DEFF Research Database (Denmark)

    Hokland, Peter

    2016-01-01

    CRISPR/Cas9 er navnet på en ny, revolutionerende genteknologi, der på sigt kan ændre menneskeheden. Forhåbentligt vil processen være være løbende opdateringer om frem- og tilbageskridt om teknikken, skriver professor.......CRISPR/Cas9 er navnet på en ny, revolutionerende genteknologi, der på sigt kan ændre menneskeheden. Forhåbentligt vil processen være være løbende opdateringer om frem- og tilbageskridt om teknikken, skriver professor....

  19. CSF neurofilament light chain is elevated in OMS (decreasing with immunotherapy) and other pediatric neuroinflammatory disorders.

    Science.gov (United States)

    Pranzatelli, Michael R; Tate, Elizabeth D; McGee, Nathan R; Verhulst, Steven J

    2014-01-15

    Using a panel of seven brain cell-specific biomarkers in cerebrospinal fluid (CSF), pediatric opsoclonus-myoclonus syndrome (OMS) (n=234) was compared to pediatric non-inflammatory neurological controls (n=84) and other inflammatory neurological disorders (OIND) (n=44). Only CSF NFL was elevated in untreated OMS versus controls (+83%). It was 87% higher in OIND than in OMS. On combination treatment with front-loaded ACTH, IVIg, rituximab, median CSF NFL decreased by 60% to control levels. These biochemical data suggest neuronal/axonal injury in some children with OMS without indicators of astrogliosis, and reduction on sufficient immunotherapy.

  20. Tidlige skrifter om musik og musikterapi (1983-89)

    DEFF Research Database (Denmark)

    Bergstrøm-Nielsen, Carl

    2011-01-01

    størrelser i kulturen og historien. "Lyd og arketyper" (1983) er skrevet som afløsningsopgave til magisterkonferens i musikvidenskab ved Københavns Universitet. Den er en opsamling af hvad Jung i bogen Forvandlingens Symboler skriver om lyd. Det sættes i yderligere perspektiv med egne tilføjelser, dels...... snævert i fortsættelse af Jung, dels ved betragtning af bønner, poesi og mantraer samt musik. Skema s.40 (s.42 i pdf) sammenfatter. - Afhandlingen knytter psykologisk stof til musik og tilgrænsende områder på en måde der umiddelbart mere er systematisk end historisk. Den har været nyttig i arbejdet med...

  1. Striden om typografiens sjel – Max Bill versus Jan Tschichold

    Directory of Open Access Journals (Sweden)

    Øyvin Rannem

    2009-08-01

    Full Text Available Den korte og følelsesladede debatten mellom den tyske typografen og designeren Jan Tschichold og den sveitsiske arkitekten og designeren Max Bill fra 1946 berører noen sentrale estetiske og funksjonelle aspekter ved typografi og grafisk design. Foranledningen for debatten var at Tschichold i løpet av krigsårene 1940–45 hadde vendt seg mot sine tidligere standpunkter og gått til angrep på funksjonalismen og «den nye typografien». Isteden tok han den tradisjonelle, symmetriske typografien i forsvar og gav den en fornyelse og en kvalitetsheving. Artikkelen tar for seg debatten og kommenterer de ulike standpunktene i lys av den senere faghistorien, og fokuserer spesielt på hvordan ideologi og tidsavhengig tanke­gods kan påvirke argumenter om funksjonalitet og estetikk. 

  2. Mentaliseringsbegrebet og dets arv fra Freuds begreb om binding

    DEFF Research Database (Denmark)

    Pedersen, Signe Holm

    2011-01-01

    Artiklen undersøger og diskuterer forskelle og ligheder mellem mentaliseringsbegrebet og Freuds bindingsbegreb. Begrebet mentalisering, som betegner en evne til at forholde sig refleksivt til egne og andres mentale tilstande, har indenfor de sidste fem- ti år vundet en central placering i klinisk...... psykologiske teoridannelser. Dets ophavsmænd Fonagy et al. forsøger imidlertid ikke at tage patent på begrebet, men peger på, at en række teoretikere har understreget betydningen af en refleksiv funktion. Alle disse begreber kan ifølge Fonagygruppen føres tilbage til Freuds begreb om binding. På baggrund af en...... udlægning af det oprindelige bindingsbegreb hos Freud, ønskes det i denne artikel at tydeliggøre den grundlæggende forskel på Freuds – og Fonagys subjektopfattelse....

  3. Lær om læring

    DEFF Research Database (Denmark)

    Ambjørn, Lone

    Det overordnede formål med kompendiet er at introducere den didaktik, der ligger til grund for disciplinen 'Spansk kommunikation', 1.-3. sem., BA-studiet i spansk. Desuden rummer kompendiet forskellige aspekter omkring sproglig læring med henblik på: at ruste de studerende til studiet på en højere...... læreranstalt; at højne effektiviteten i deres sproglige læringsproces; at bevidstgøre de studerende om e-læring; at lære de studerende at arbejde uafhængigt af underviseren; at give de studerende de nødvendige redskaber til at tage et ægte medansvar for deres egen læringsproces; at lære de studerende...

  4. Likestilt og forskjellig? Om menn og likestilling i barnehagen

    Directory of Open Access Journals (Sweden)

    Olav Kasin

    2015-03-01

    Full Text Available This article highlight the goal of 20 percent male employees in Norwegian kindergartens as a contribution to promoting gender equality. We conducted two studies showing different expectations towards men and women. Informants are positive to increasing the number of men, but in the two surveys they expressed conflicting expectations towards the role of men in kindergartens. In the survey among male preschool students they have objections to recruit men as a group because they are men (Kasin et al. 2010. In the survey among employees in kindergartens they desire men just because they are men, different from women. Their rationale is that this creates diversity (Kasin and Slåtten 2011. We discuss this seeming contradiction in the informants' views on the basis of different perceptions about gender. By using different levels of analysis we show how male employees can be understood in several ways that promotes gender equality. At the societal level, several men in kindergarten can be seen as part of a liberal policy to promote equal rights and opportunities for labor force participation. At the institutional level, gender equality depends on activities in the educational program. At the individual level equality can be understood as practices among each employee that prevent stereotyped gender understanding, and through these practices give children equal opportunities across gender divides. Our own research indicates that exclusive focuses on the representation of male employees in kindergartens are likely to conceal rather than to clarify a need to develop educational practices that promote gender equality. Artikkelen belyser målsettingen om 20 prosent menn i norske barnehager som bidrag til å fremme likestilling i barnehagen. Vi har gjennomført to undersøkelser som viser at det eksisterer ulike forventinger til menn og kvinner i barnehagen. Informantene er positive til flere menn, men i de to undersøkelsene uttrykkes det motstridende

  5. Samtal om estetiska aspekter i textilslöjden

    Directory of Open Access Journals (Sweden)

    Siri Homlong

    2011-11-01

    Full Text Available I slöjdundervisningen i Sverige är ett av målen att eleven skall utveckla förmågan att göra och motivera personliga ställningstaganden kring estetiska värden. I en studie med elever i grundskolan (Homlong, 2006a,b visade det sig att eleverna hade klara åsikter om vad de tyckte om några olikt mönstrade tyger, men saknade formalestetiska begrepp för att förklara dessa åsikter. De begrundade i stor grad sina ställningstaganden med funktionella användningsområden eller hänvisning till personliga erfarenheter av liknande mönster, färger eller textilier.Undersökningsmetoden som användes i studien The Language of Textiles (Homlong, 2006a var en modifierad Repertory Grid där eleven i flera omgångar skulle välja mellan tre olikt mönstrade tyger och motivera valen. Metoden bygger på att den jämförande analysen lyfter fram likheter och olikheter i en process där begrepp och deras motsatsbenämningar lyfts fram. Denna artikel visar exempel på hur eleverna i studien motiverade sina ställningstagande, i vilka situationer och på vilka områden de hade problem med att förklara orsaken till sina ställnings-taganden, och föreslår hur en jämförande analysmetod kan bidra till utveckling av kommunikation kring estetiska aspekter i slöjdundervisningen. Sökord: metod, slöjd, intervju, repertory grid, kommunikationURN:NBN:no-29967

  6. System identification application using Hammerstein model

    Indian Academy of Sciences (India)

    SABAN OZER; HASAN ZORLU; SELCUK METE

    2016-06-01

    Generally, memoryless polynomial nonlinear model for nonlinear part and finite impulse response (FIR) model or infinite impulse response model for linear part are preferred in Hammerstein models in literature. In this paper, system identification applications of Hammerstein model that is cascade of nonlinear second order volterra and linear FIR model are studied. Recursive least square algorithm is used to identify the proposed Hammerstein model parameters. Furthermore, the results are compared to identify the success of proposed Hammerstein model and different types of models

  7. Modeling of economic systems with Petri nets

    Directory of Open Access Journals (Sweden)

    Pavel Valeryevich Skorodumov

    2014-09-01

    Full Text Available Modeling is one of the most important tools to study complex systems. Components of both continuous and discrete nature are present in the behavior of contemporary economic systems. The article uses formalism of nested hybrid Petri nets as a tool to study complex economic systems. The author describes basic approaches of simulation modelling, concepts of classical Petri nets, modified means of nested hybrid Petri nets, benefits of their use for systems modeling. The article presents the concept of a universal system of simulation modeling. On the basis of considered approaches the article proposes to develop a universal system of simulation modeling on the basis of the modified machine Petri nets

  8. Modeling Power Systems as Complex Adaptive Systems

    Energy Technology Data Exchange (ETDEWEB)

    Chassin, David P.; Malard, Joel M.; Posse, Christian; Gangopadhyaya, Asim; Lu, Ning; Katipamula, Srinivas; Mallow, J V.

    2004-12-30

    Physical analogs have shown considerable promise for understanding the behavior of complex adaptive systems, including macroeconomics, biological systems, social networks, and electric power markets. Many of today's most challenging technical and policy questions can be reduced to a distributed economic control problem. Indeed, economically based control of large-scale systems is founded on the conjecture that the price-based regulation (e.g., auctions, markets) results in an optimal allocation of resources and emergent optimal system control. This report explores the state-of-the-art physical analogs for understanding the behavior of some econophysical systems and deriving stable and robust control strategies for using them. We review and discuss applications of some analytic methods based on a thermodynamic metaphor, according to which the interplay between system entropy and conservation laws gives rise to intuitive and governing global properties of complex systems that cannot be otherwise understood. We apply these methods to the question of how power markets can be expected to behave under a variety of conditions.

  9. Neuman systems model in holland: an update.

    Science.gov (United States)

    Merks, André; Verberk, Frans; de Kuiper, Marlou; Lowry, Lois W

    2012-10-01

    The authors of this column, leading members of the International Neuman Systems Model Association, provide an update on the use of Neuman systems model in Holland and document the various changes in The Netherlands that have influenced the use of the model in that country. The model's link to systems theory and stress theory are discussed, as well as a shift to greater emphasis on patient self-management. The model is also linked to healthcare quality improvement and interprofessional collaboration in Holland.

  10. New model systems for experimental evolution.

    Science.gov (United States)

    Collins, Sinéad

    2013-07-01

    Microbial experimental evolution uses a few well-characterized model systems to answer fundamental questions about how evolution works. This special section highlights novel model systems for experimental evolution, with a focus on marine model systems that can be used to understand evolutionary responses to global change in the oceans.

  11. Performance modeling of automated manufacturing systems

    Science.gov (United States)

    Viswanadham, N.; Narahari, Y.

    A unified and systematic treatment is presented of modeling methodologies and analysis techniques for performance evaluation of automated manufacturing systems. The book is the first treatment of the mathematical modeling of manufacturing systems. Automated manufacturing systems are surveyed and three principal analytical modeling paradigms are discussed: Markov chains, queues and queueing networks, and Petri nets.

  12. Modeling human operator involvement in robotic systems

    NARCIS (Netherlands)

    Wewerinke, P.H.

    1991-01-01

    A modeling approach is presented to describe complex manned robotic systems. The robotic system is modeled as a (highly) nonlinear, possibly time-varying dynamic system including any time delays in terms of optimal estimation, control and decision theory. The role of the human operator(s) is modeled

  13. Visual computing model for immune system and medical system.

    Science.gov (United States)

    Gong, Tao; Cao, Xinxue; Xiong, Qin

    2015-01-01

    Natural immune system is an intelligent self-organizing and adaptive system, which has a variety of immune cells with different types of immune mechanisms. The mutual cooperation between the immune cells shows the intelligence of this immune system, and modeling this immune system has an important significance in medical science and engineering. In order to build a comprehensible model of this immune system for better understanding with the visualization method than the traditional mathematic model, a visual computing model of this immune system was proposed and also used to design a medical system with the immune system, in this paper. Some visual simulations of the immune system were made to test the visual effect. The experimental results of the simulations show that the visual modeling approach can provide a more effective way for analyzing this immune system than only the traditional mathematic equations.

  14. Externalizing Behaviour for Analysing System Models

    NARCIS (Netherlands)

    Ivanova, Marieta Georgieva; Probst, Christian W.; Hansen, René Rydhof; Kammüller, Florian

    Systems models have recently been introduced to model organisationsandevaluate their vulnerability to threats and especially insiderthreats. Especially for the latter these models are very suitable, since insiders can be assumed to have more knowledge about the attacked organisation than outside

  15. CONTROL SYSTEM IDENTIFICATION THROUGH MODEL MODULATION METHODS

    Science.gov (United States)

    identification has been achieved by using model modulation techniques to drive dynamic models into correspondence with operating control systems. The system ... identification then proceeded from examination of the model and the adaptive loop. The model modulation techniques applied to adaptive control

  16. Slowly decaying resonances of charged massive scalar fields in the Reissner-Nordstr\\"om black-hole spacetime

    CERN Document Server

    Hod, Shahar

    2016-01-01

    We determine the characteristic timescales associated with the linearized relaxation dynamics of the composed Reissner-Nordstr\\"om-black-hole-charged-massive-scalar-field system. To that end, the quasinormal resonant frequencies $\\{\\omega_n(\\mu,q,M,Q)\\}_{n=0}^{n=\\infty}$ which characterize the dynamics of a charged scalar field of mass $\\mu$ and charge coupling constant $q$ in the charged Reissner-Nordstr\\"om black-hole spacetime of mass $M$ and electric charge $Q$ are determined {\\it analytically} in the eikonal regime $1\\ll M\\muom-black-...

  17. Two sustainable energy system analysis models

    DEFF Research Database (Denmark)

    Lund, Henrik; Goran Krajacic, Neven Duic; da Graca Carvalho, Maria

    2005-01-01

    This paper presents a comparative study of two energy system analysis models both designed with the purpose of analysing electricity systems with a substantial share of fluctuating renewable energy.......This paper presents a comparative study of two energy system analysis models both designed with the purpose of analysing electricity systems with a substantial share of fluctuating renewable energy....

  18. Ny krigsførelse i informationsalderen? Om ‘Revolution in Military Affairs’ og Irakkrigen

    Directory of Open Access Journals (Sweden)

    Jens Claus Hansen

    2005-09-01

    Full Text Available Artiklen diskuterer, hvorvidt man efter Golfkrigen kan tale om en ‘Revolu- tion in Military Affairs’ – RMA – som nogle amerikanske krigsteoretikere hævder har fundet sted med anvendelsen af ny teknologi i moderne krigs- førelse. Forfatteren viser, hvordan moderne krigsstrategier har inkorpore- ret ny teknologi og mediebrug som bl.a. informationskrig, ‘Systems of Sys- tems’ og Network Centric Warfare. Forfatteren påpeger, at den strategiske anvendelse af informationsoperationer – herunder ‘embedded’ journalister – ikke har medført en demokratisering af nyhedsdækningen og heller ikke indebærer en øget sandhedsværdi. Afslutningsvis peger forfatteren på behovet for en ‘Revolution in Diplomatic Affairs’.

  19. Origami microfluidic paper-analytical-devices (omPAD) for sensing and diagnostics.

    Science.gov (United States)

    Punjiya, Meera; Chung Hee Moon; Yu Chen; Sonkusale, Sameer

    2016-08-01

    Recent research activities in the area of low-cost sensing and diagnostics that are realized on cellulosic paper substrate are presented. First a three-dimensional origami paper-based analytical device (omPAD) with multiple electrochemical sensors, an integrated sample reservoir and tight integration with a custom CMOS potentiostat is presented. Second, an optical sensor array with built-in microfluidic channel for sample delivery is presented. The sensors are fabricated using a combination of wax printing and screen-printing using a solution based approach in ambient conditions without the need for expensive fabrication equipment or a cleanroom. Readout is based on using existing consumer grade electronic devices like flatbed scanner (for optical sensor) or custom designed CMOS potentiostat (for electrochemical sensors). Together the 3D paper-based analytical device with integrated sensor, microfluidics and portable readout instrumentation demonstrates a low-cost, self-contained system suitable for sensing and point-of-care diagnostics.

  20. An engineering evaluation of the Space Shuttle OMS engine after 5 orbital flights

    Science.gov (United States)

    David, D.

    1983-01-01

    Design features, performances on the first five flights, and condition of the Shuttle OMS engines are summarized. The engines were designed to provide a vacuum-fed 6000 lb of thrust and a 310 sec specific impulse, fueled by a combination of N2O4 and monomethylhydrazine (MMH) at a mixture ratio of 1.65. The design lifetime is 1000 starts and 15 hr of cumulative firing duration. The engine assembly is throat gimballed and features yaw actuators. No degradation of the hot components was observed during the first five flights, and the injector pattern maintained a uniform, enduring level of performance. An increase in the take-off loads have led to enhancing the wall thickness in the nozzle in affected areas. The engine is concluded to be performing to design specifications and is considered an operational system.

  1. Warm Paleocene/Eocene climate as simulated in ECHAM5/MPI-OM

    Directory of Open Access Journals (Sweden)

    M. Heinemann

    2009-12-01

    Full Text Available We investigate the late Paleocene/early Eocene (PE climate using the coupled atmosphere-ocean-sea ice model ECHAM5/MPI-OM. The surface in our PE control simulation is on average 297 K warm and ice-free, despite a moderate atmospheric CO2 concentration of 560 ppm. Compared to a pre-industrial reference simulation (PR, low latitudes are 5 to 8 K warmer, while high latitudes are up to 40 K warmer. This high-latitude amplification is in line with proxy data, yet a comparison to sea surface temperature proxy data suggests that the Arctic surface temperatures are still too low in our PE simulation.

    To identify the mechanisms that cause the PE-PR surface temperature differences, we fit two simple energy balance models to the ECHAM5/MPI-OM results. We find that about 2/3 of the PE-PR global mean surface temperature difference are caused by a smaller clear sky emissivity due to higher atmospheric CO2 and water vapour concentrations in PE compared to PR; 1/3 is due to a smaller planetary albedo. The reduction of the pole-to-equator temperature gradient in PE compared to PR is due to (1 the large high-latitude effect of the higher CO2 and water vapour concentrations in PE compared to PR, (2 the lower Antarctic orography, (3 the smaller surface albedo at high latitudes, and (4 longwave cloud radiative effects. Our results support the hypothesis that local radiative effects rather than increased meridional heat transports were responsible for the "equable" PE climate.

  2. Mogelijkheden om vroeg tijdig bladrandproblemen te signaleren met MIPS bij Hortensia

    NARCIS (Netherlands)

    Noort, van F.R.; Jalink, H.

    2010-01-01

    Met geavanceerde camera technieken zijn beelden vast te leggen van fotosynthese activiteit en het is ook mogelijk gebleken om bladgedeelten met stress vast te leggen, zonder dat deze stress met het blote oog al te zien is. Dit opent perspectieven om monitorringonderzoek te doen naar het ontstaan van

  3. Fantasier om pædagogen i skolen i en reformtid

    DEFF Research Database (Denmark)

    Pedersen, Rikke; Feilberg, Ane Vester

    2016-01-01

    læringsdagsordenen qua skolereformen slår igennem i skolens praksis som særlige idealer eller organisatoriske fantasier, som vi kalder dem, om pædagogen i skolen. Artiklen viser, hvordan samtidigt tilstedeværende organisatoriske fantasier om fleksibilitet og læringsproduktivitet udfordrer dele af den pædagogiske...

  4. One size fits all? Onderzoek naar initiatieven om vrouwen in de informatiesamenleving te betrekken

    NARCIS (Netherlands)

    Rommes, E.W.M.

    2004-01-01

    Hoe betrek je vrouwen in de informatiesamenleving van websites, mobiele telefoons en digitaal speelgoed? De verleiding om 'roze websites' met advies over lipstick en veel chat mogelijkheden te ontwerpen blijkt groot. Els Rommes onderzocht welke strategieën succesvol zijn om vrouwen meer te betrekken

  5. On Embedding N2R Structures in Optical Fiber OMS-SP Ring

    DEFF Research Database (Denmark)

    Riaz, Muhammad Tahir; Pedersen, Jens Myrup; Nielsen, Rasmus Hjorth

    2006-01-01

    The objective of this paper is to propose methods for embedding N2R structures in optical fiber OMS-SP rings. The OMS-SP ring supports full mesh structure and restoration on the optical level. The N2R structures have been proven to be superior to other degree 3 network structures. Two main mapping...

  6. Fra troldmandens værksted: Historien om forskerne, der skrev den politiske instruktionsbog til atombomben

    DEFF Research Database (Denmark)

    Rasmussen, Mikkel Vedby

    2011-01-01

    Fred Kaplans The Wizards of Armageddon handler om denne gruppe forskere og hvordan de lærte de amerikanske beslutningstagere om ikke ‘at elske bomben og glemme deres bekymringer', som Dr. Strangelove's filmplakat i sin tid lovede, men så dog at forstå bomben og vide hvordan man skulle bekymre sig...

  7. De kans om een tenniswedstrijd te winnen: Federer-Nadal in de finale van Wimbledon 2007

    NARCIS (Netherlands)

    Klaassen, F.J.G.M.; Magnus, J.R.

    2008-01-01

    De simpelste methode om de winnaar te voospellen, is te kijken naar eerdere prestaties. Dit artikel beschrijft een methode om de winnaar van een tenniswedstrijd te voorspellen, niet alleen bij aanvang van de wedstrijd, maar (juist) ook gedurende de wedstrijd. De kans dat een speler de wedstrijd zal

  8. An algorithm and a Tool for Wavelength Allocation in OMS-SP Ring Architecture

    DEFF Research Database (Denmark)

    Riaz, Muhammad Tahir; Pedersen, Jens Myrup; Madsen, Ole Brun

    2006-01-01

    OMS-SP ring is one of the well known architectures in Wavelength Division Multiplexing based optical fiber networks. The architecture supports a restorable full mesh in an optical fiber ring using multiple light wavelengths. The paper presents an algorithm to allocate wavelengths in the OMS-SP ring...

  9. Teaching OM at an Action-based Learning Program for Top Executives

    DEFF Research Database (Denmark)

    Perunovic, Zoran; Staffensen, Lasse

    2013-01-01

    The paper discusses design and execution of OM module in an intensive program for top executives. The participants are working as consultants in six different host companies on developing growth strategies. The OM module is designed to enable the participants to develop operations strategy...

  10. Providing O&M Services to Children and Youth with Severe Multiple Disabilities.

    Science.gov (United States)

    Bailey, Brent R.; Head, Daniel N.

    1993-01-01

    This article argues that orientation and mobility (O&M) training should be part of functional and meaningful activities for children and youth with severe multiple disabilities including a visual impairment. Evidence is provided that out-of-context instruction has not been effective, and the role of the O&M instructor is discussed. (DB)

  11. Facilitating Successful Outdoor O&M Instruction of Multihandicapped Blind Travelers.

    Science.gov (United States)

    Ehresman, Paul

    1994-01-01

    An orientation and mobility (O&M) instructor presents a case study of a blind 14 year old with mild cognitive deficits and emotional and behavioral problems. The case study demonstrates the importance of individualizing the O&M curriculum, including changing the usual sequence of instruction. (DB)

  12. Graphical Model Debugger Framework for Embedded Systems

    DEFF Research Database (Denmark)

    Zeng, Kebin; Guo, Yu; Angelov, Christo K.

    2010-01-01

    Model Driven Software Development has offered a faster way to design and implement embedded real-time software by moving the design to a model level, and by transforming models to code. However, the testing of embedded systems has remained at the code level. This paper presents a Graphical Model...... Debugger Framework, providing an auxiliary avenue of analysis of system models at runtime by executing generated code and updating models synchronously, which allows embedded developers to focus on the model level. With the model debugger, embedded developers can graphically test their design model...

  13. Epidemiologisk forskning om uførepensjon i Norden

    Directory of Open Access Journals (Sweden)

    Johan Håkon Bjørngaard

    2010-01-01

    Full Text Available En relativ stor andel av befolkningen i yrkesaktiv alder i de nordiske landene mottar uførepensjon, og i Norge er det en klar tendens til økning. Parallelt med dette har interessen for forskning rundt uførepensjon som fenomen økt. Vi har i denne studien beskrevet den epidemiologiske forskningen om uførepensjon i Norden. I en systematisk litteraturgjennomgang fant vi 118 aktuelle artikler. Alle de nordiske landene er godt representert. Kohortstudier med uførepensjon som endepunkt utgjorde hovedvekten av materialet, hvor 67 var populasjonsbaserte mens 29 tok utgangspunkt i selekterte pasientpopulasjoner. I alt seks kohortstudier benyttet uførepensjon som eksponering. Vi fant videre syv kasus-kontrollstudier og ni forsøk. Det er betydelig dokumentasjon på at ulike sykdommer og helseplager er assosiert med økt risiko for uførhet, i tillegg til at sosioøkonomiske og arbeidsrelaterte forhold er av betydning. Gjennomgangen viser at den epidemiologiske forskningen for det meste har rettet blikket mot individuelle årsaker til uførepensjonering. Selv om denne forskningen er viktig, kan den neppe forklare økningen vi har sett i det siste tiåret. Den videre forskningen bør utforske nærmere hvordan individuell sårbarhet ender i utstøtelse fra arbeidslivet. Med tanke på den omfattende forskningen om årsaker på dette feltet, bør man også i større grad gjennomføre forsøk for å bedre utsatte gruppers arbeidsdeltakelse.Bjørngaard JH, Krokstad S, Johnsen R, Karlsen AO, Pape K, Støver M, Sund E, Westin S. Epidemiological research on disability benefits in the Nordic countries. Nor J Epidemiol 2009; 19 (2: 103-114 ENGLISH SUMMARYA substantial part of the workforce in the Nordic countries receives a disability benefit, and in Norway this beneficiary rate is growing. As a result, disability benefit has been the subject of new interest and research. In this study we have reviewed the epidemiological research on disability benefit in the

  14. Ultra-Wideband Optical Modulation Spectrometer (OMS) Development: Study of the Optical Setup of a Wide-Band Optical Modulation Spectrometer

    Science.gov (United States)

    Tolls, Volker; Stringfellow, Guy (Technical Monitor)

    2001-01-01

    The purpose of this study is to advance the design of the optical setup for a wide-band Optical Modulation Spectrometer (OMS) for use with astronomical heterodyne receiver systems. This report describes the progress of this investigation achieved from March until December 2001.

  15. Particle Tracking Model (PTM) with Coastal Modeling System (CMS)

    Science.gov (United States)

    2014-10-31

    System ( CMS ) 5a. CONTRACT NUMBER 5b. GRANT NUMBER 5c. PROGRAM ELEMENT NUMBER 6. AUTHOR(S) 5d. PROJECT NUMBER 5e. TASK NUMBER 5f. WORK UNIT NUMBER...www.erdc.usace.army.mil/Missions/WaterResources/CIRP.aspx Coastal Inlets Research Program Particle Tracking Model (PTM) with Coastal Modeling System ( CMS ) The...System ( CMS ), which provides coupled wave and current forcing for PTM simulations. CMS -PTM is implemented in the Surface-water Modeling System, a

  16. Fjernsynet som shaman: Om store mediebegivenheders transformative virkninger

    Directory of Open Access Journals (Sweden)

    Daniel Dayan

    1988-08-01

    Full Text Available Den direkte transmission af levende begivenheder har altid været TV- mediets særlige styrke, hvad enten det drejer sig om fodboldkampe, Lørdagskanalen eller kongebrylluper. Medieforskerne har da også interesseret sig for fjernsynets formidling af sportsbegivenheder og der er blevet lavet analyser af Kanaludsendelserne. Men hverken i Danmark eller andre steder har forskerne fundet det interessant at undersøge de store, ceremonielle mediebegivenheder. Det er Dayan & Katz´ projekt at udfylde dette tomrum i medie- og kul- turforskningen: Hvad er det, der fascinerer millioner ved disse TV- ceremonier, der ofte ikke blot henvender sig til et enkelt lands seere, men transmitteres til og ses af store dele af verden? Hvordan fungere disse begivenheder - hvad enten det drejer sig om Præsident Kennedys begravelse, Sadats besøg i Jerusalem, Månelandingen eller Watergate- høringerne - ideologisk, og hvilke interesser tjener de dermed i den politiske offentlighed? I denne artikel, der er et bearbejdet uddrag af den bog, projektet skal munde ud i, beskæftiger Dayan & Katz sig især med det de kalder "transformative" mediebegivenheder, dvs. TV-ceremonier der markerer, at et samfund står ved en tærskel mellem den herskende orden og en ny mulig orden, og som selv er et aktivt og aktiverende bidrag til forvand- lingen af kulturelle opfattelser og værdier. Artiklens perpektiv er udpræget tværvidenskabeligt, idet der trækkes på såvel kulturantropologiske (Levi-Strauss, Geertz, Turner som filosofiske (Bakhtin, Baudrillard, sprogteoretiske (Austin og traditionelt samfunds- videnskabelige/mediesociologiske (Boorstin arbejder. I artiklens første halvdel foretages der en afgrænsning af transformative over for andre ceremonielle begivenheder. I anden halvdel gennemgås de fem faser, som udgør transformative begivenheders typiske struktur. Artiklen er bearbejdet af Jørgen Bang og Kim Schrøder. Den er oversat af Kim Schrøder.

  17. Analysis hierarchical model for discrete event systems

    Science.gov (United States)

    Ciortea, E. M.

    2015-11-01

    The This paper presents the hierarchical model based on discrete event network for robotic systems. Based on the hierarchical approach, Petri network is analysed as a network of the highest conceptual level and the lowest level of local control. For modelling and control of complex robotic systems using extended Petri nets. Such a system is structured, controlled and analysed in this paper by using Visual Object Net ++ package that is relatively simple and easy to use, and the results are shown as representations easy to interpret. The hierarchical structure of the robotic system is implemented on computers analysed using specialized programs. Implementation of hierarchical model discrete event systems, as a real-time operating system on a computer network connected via a serial bus is possible, where each computer is dedicated to local and Petri model of a subsystem global robotic system. Since Petri models are simplified to apply general computers, analysis, modelling, complex manufacturing systems control can be achieved using Petri nets. Discrete event systems is a pragmatic tool for modelling industrial systems. For system modelling using Petri nets because we have our system where discrete event. To highlight the auxiliary time Petri model using transport stream divided into hierarchical levels and sections are analysed successively. Proposed robotic system simulation using timed Petri, offers the opportunity to view the robotic time. Application of goods or robotic and transmission times obtained by measuring spot is obtained graphics showing the average time for transport activity, using the parameters sets of finished products. individually.

  18. Utilização do modelo FPEEEA (OMS para a análise dos riscos relacionados ao uso de agrotóxicos em atividades agrícolas do estado do Rio de Janeiro Using the 'Driving Force - Pressure - State - Exposure - Effects - Action' (DPSEEA model of the World Health Organization (WHO for the analysis of risks related to the use of pesticides in agricultural activities in the state of Rio de Janeiro

    Directory of Open Access Journals (Sweden)

    Mariana de Araújo-Pinto

    2012-06-01

    Full Text Available O presente trabalho utiliza como instrumento de análise o Modelo de FPEEEA (OMS visando a caracterização dos riscos à saúde do trabalhador rural e ao ambiente decorrentes do uso intensivo de agrotóxicos no estado do Rio de Janeiro, a partir do levantamento de documentos oficiais públicos e de revisão de literatura (nacional e internacional. Enfatizam-se os dois principais ramos representativos do estado: a agricultura familiar na Região Serrana e a monocultura da cana-de-açúcar na região Norte Fluminense. Resultados mostram que grande parte dos determinantes identificados na Matriz FPEEEA encontra-se relacionada às deficiências nas ações de fiscalização e vigilância do uso de agrotóxicos e de assistência técnica por parte do Poder Público, no estado do RJ. A maioria das ações desenvolvidas, no estado, se concentra no enfrentamento dos efeitos e, em menor escala, da exposição, deixando de focar os níveis mais superiores da matriz (como as forças motrizes e a pressão, apontados por diferentes autores como mais adequados ao enfrentamento de problemas complexos e sistêmicos como o objeto do presente estudo. Buscou-se habilitar a aplicação do Modelo FPEEEA para o subsídio de ações de vigilância em saúde ambiental e em saúde do trabalhador.This paper seeks to apply the DPSEEA model (WHO to identify major health risks to rural workers and the environment associated with the intensive use of pesticides in the State of Rio de Janeiro, based on an analysis of official public documents and a review of the (national and international literature. It emphasizes the two main representative branches of agriculture in the state: family farming in the mountain region and the monoculture of sugarcane in the flatlands. Results show that the bulk of the determinants identified in the DPSEEA Matrix are related to deficiencies in actions for monitoring and surveillance of pesticide use, as well as a lack of technical assistance

  19. Maltose- and maltotriose-modified, hyperbranched poly(ethylene imine)s (OM-PEIs): Physicochemical and biological properties of DNA and siRNA complexes.

    Science.gov (United States)

    Höbel, Sabrina; Loos, Andrea; Appelhans, Dietmar; Schwarz, Simona; Seidel, Jürgen; Voit, Brigitte; Aigner, Achim

    2011-01-20

    Polycationic non-viral polymers are widely employed as delivery platforms of plasmid DNA, or of small interfering RNAs (siRNAs) for the induction of RNA interference (RNAi). Among those, poly(ethylene imine)s (PEIs) take a prominent position due to their relatively high efficacy; however, their biodistribution profiles upon systemic delivery and their toxicity pose limitations which can be addressed by the introduction of PEI modifications. In this paper, we systematically analyse physicochemical and biological properties of DNA and siRNA complexes prepared from a set of maltose-, maltotriose- or maltoheptaose-modified hyperbranched PEIs (termed (oligo-)maltose-modified PEIs; OM-PEIs). We show that pH-dependent charge densities of the OM-PEIs correlate with the structure and degree of grafting, and the length of the oligomaltose. Decreased zeta potentials of OM-PEI-based complexes and changes in the thermodynamics of DNA complex formation are observed, while the complex sizes are largely unaffected by maltose grafting and the presence of serum proteins. Furthermore, although complexation efficacies of siRNAs are not altered, complex stabilities are markedly increased in OM-PEI complexes. DNA complex uptake and transfection kinetics are slowed down upon maltose-grafting of the PEI which can be attributed to decreased zeta potentials, and alterations in the uptake mechanisms (clathrin-dependent/clathrin-independent endocytosis) are observed. Independent of the maltose architecture, DNA and siRNA complexes based on maltose-grafted PEI show considerably lower cytotoxicity as compared to PEI complexes. While maltose grafting generally leads to reduced in vitro transfection efficacies, this effect is less profound in some OM-PEI/siRNA complexes as compared to OM-PEI/DNA complexes. Importantly, upon their systemic application in vivo, OM-PEI/siRNA complexes show marked differences in the siRNA biodistribution profile with e.g. substantially decreased siRNA levels in the

  20. 小号旗舰奥林巴斯OM-DE-M10

    Institute of Scientific and Technical Information of China (English)

    2014-01-01

    OM-DE-M5发售两年后,OM-D系列奥林巴斯相继发布了E-M10,OM-D系列充实起来。新品E-M10定位入门级,外形更加紧凑,尺寸为119×82.3×45.9(mm),重量为396g。便携性出色的同时,E-M10的操控性并没有缩水,依旧保持了OM-D系列一贯的高水准。前后双拔轮、自定义快捷键、视频拍摄键和可触摸屏幕,OM-D的经典元素一个也不少。

  1. Extensions in model-based system analysis

    OpenAIRE

    Graham, Matthew R.

    2007-01-01

    Model-based system analysis techniques provide a means for determining desired system performance prior to actual implementation. In addition to specifying desired performance, model-based analysis techniques require mathematical descriptions that characterize relevant behavior of the system. The developments of this dissertation give ex. tended formulations for control- relevant model estimation as well as model-based analysis conditions for performance requirements specified as frequency do...

  2. Inductive modelling of an entrepreneurial system

    OpenAIRE

    Yearworth, M

    2010-01-01

    We describe the development of a novel approach to generating theory about the behaviour of an entrepreneurial or start-up system. The new technology business creation system in and around the cities of Bath and Bristol in the UK was analysed using an inductive modelling approach that hybridises grounded theory with system dynamics, a technique we have called grounded systems modelling. Three models that represent the stages of development of an idea through to successful exploitation have be...

  3. Control model for reconfigurable assembly systems

    Institute of Scientific and Technical Information of China (English)

    Yu Jianfeng; Yin Yuehong; Chen Zhaoneng

    2005-01-01

    This paper proposes knowledge based object-oriented timed colored Petri net, a modeling method for reconfigurable assembly systems. Combining knowledge and object-oriented method into timed colored Petri net, a comprehensive and powerful representation model for control of RAS is obtained. With object-oriented method the whole system can be decomposed into concrete objects explicitly, and their relationships are constructed according to the system assembly requirements. Finally, a simple assembly system modeled by the KTCOPN is presented.

  4. Modelling Immune System: Principles, Models,Analysis and Perspectives

    Institute of Scientific and Technical Information of China (English)

    Xiang-hua Li; Zheng-xuan Wang; Tian-yang Lu; Xiang-jiu Che

    2009-01-01

    The biological immune system is a complex adaptive system. There are lots of benefits for building the model of the immune system. For biological researchers, they can test some hypotheses about the infection process or simulate the responses of some drugs. For computer researchers, they can build distributed, robust and fault tolerant networks inspired by the functions of the immune system. This paper provides a comprehensive survey of the literatures on modelling the immune system. From the methodology perspective, the paper compares and analyzes the existing approaches and models, and also demonstrates the focusing research effort on the future immune models in the next few years.

  5. Comparison of Photovoltaic Models in the System Advisor Model: Preprint

    Energy Technology Data Exchange (ETDEWEB)

    Blair, N. J.; Dobos, A. P.; Gilman, P.

    2013-08-01

    The System Advisor Model (SAM) is free software developed by the National Renewable Energy Laboratory (NREL) for predicting the performance of renewable energy systems and analyzing the financial feasibility of residential, commercial, and utility-scale grid-connected projects. SAM offers several options for predicting the performance of photovoltaic (PV) systems. The model requires that the analyst choose from three PV system models, and depending on that choice, possibly choose from three module and two inverter component models. To obtain meaningful results from SAM, the analyst must be aware of the differences between the model options and their applicability to different modeling scenarios. This paper presents an overview the different PV model options and presents a comparison of results for a 200-kW system using different model options.

  6. Graphical Model Debugger Framework for Embedded Systems

    DEFF Research Database (Denmark)

    Zeng, Kebin

    2010-01-01

    Debugger Framework, providing an auxiliary avenue of analysis of system models at runtime by executing generated code and updating models synchronously, which allows embedded developers to focus on the model level. With the model debugger, embedded developers can graphically test their design model......Model Driven Software Development has offered a faster way to design and implement embedded real-time software by moving the design to a model level, and by transforming models to code. However, the testing of embedded systems has remained at the code level. This paper presents a Graphical Model...... and check the running status of the system, which offers a debugging capability on a higher level of abstraction. The framework intends to contribute a tool to the Eclipse society, especially suitable for model-driven development of embedded systems....

  7. Modeling and Identification of Multirate Systems

    Institute of Scientific and Technical Information of China (English)

    Feng DING; Tongwen CHEN

    2005-01-01

    Multirate systems are abundant in industry; for example, many soft-sensor design problems are related to modeling, parameter identification, or state estimation involving multirate systems. The study of multirate systems goes back to the early 1950's, and has become an active research area in systems and control. This paper briefly surveys the history of development in the area of multirate systems, and introduces some basic concepts and latest results on multirate systems, including a polynomial transformation technique and the lifting technique as tools for handling multirate systems, lifted state space models, parameter identification of dual-rate systems, how to determine fast single-rate models from dual-rate models and directly from dual-rate data, and a hierarchical identification method for general multirate systems. Finally, some further research topics for multirate systems are given.

  8. On Problems of Multicomponent System Maintenance Modelling

    Institute of Scientific and Technical Information of China (English)

    Tomasz Nowakowski; Sylwia Werbinka

    2009-01-01

    We present an overview of some recent developments in the area of mathematical modeling of maintenance decisions for multi-unit systems. The emphasis is on three main groups of multicomponent maintenance optimization models: the block replacement models, group maintenance models, and opportunistic maintenance models. Moreover, an example of a two-unit system maintenance process is provided in order to compare various maintenance policies.

  9. Traffic Modeling in WCDMA System Level Simulations

    Institute of Scientific and Technical Information of China (English)

    2002-01-01

    Traffic modeling is a crucial element in WCDMA system level simulations. A clear understanding of the nature of traffic in the WCDMA system and subsequent selection of an appropriate random traffic model are critical to the success of the modeling enterprise. The resultant performances will evidently be of a function that our design has been well adapted to the traffic, channel and user mobility models, and these models are also accurate. In this article, our attention will be focused on modeling voice and WWW data traffic with the SBBP model and Victor model respectively.

  10. Out! : Om Dansk Tennis Club og tennisspilleren Leif Rovsing

    DEFF Research Database (Denmark)

    Kural, René

    2012-01-01

    I bogen “Out!” forenes et fascinerende portræt af en excentriker med en næsten ukendt, arkitektonisk perle. En af Danmarks mest kendte tennisspillere, rigmanden Leif Rovsing, er hovedpersonen, den danske sportsverden er scenen, og Dansk Tennis Club er det monument, han selv rejser og som bliver et...... svensk og norsk international single mester – er udelukket fra at deltage i tennisturneringer i Danmark, stifter han sin egen tennisturnering og bygger sin egen hal, den utroligt smukke og usædvanlige Dansk Tennis Club i Hellerup. ”Out!” er en fotografisk bog med et omfattende og unikt historisk og...... nutidigt fotografisk materiale. Dansk Tennis Club er beliggende i et smukt kvarter af pragtvillaer, lave rækkehuse og gamle haver. Her rager hallen majestætisk i vejret svøbt i okkergule og okseblodsrøde farver. Allerede i indgangspartiet afslører ægyptiske motiver på væggene, at her er tale om noget helt...

  11. Revolution i detailhandlen? Om Marshall-plan, studierejser og selvbetjeningsbutikker.

    Directory of Open Access Journals (Sweden)

    Sissel Bjerrum Fossat

    2013-11-01

    Full Text Available Artiklen undersøger, hvordan udbredelsen af selvbetjeningsbutikker i Danmark var en del af Marshall-planens målsætning. Ved at fokusere på en af de rejser om selvbetjening, der blev arrangeret i Marshall-regi, kan det vises, hvordan oprettelsen af selvbetjeningsbutikker både var i overensstemmelse med amerikanske og danske ønsker. I den danske detailhandel var især kooperationen interesseret i de nye principper, men der fandtes også skeptiske stemmer, der advarede mod de amerikanske ideer. Abstract The article explores how the dissemination of self-service shops in Denmark was an integral part of the Marshall Plan. Focusing on one of those journeys under the auspices of the Marshall Plan to study such self-service shops in the USA, the article shows how the creation of self-service shops was in accordance with American as well as Danish aspirations. In the Danish retailing business, particularly the cooperative movement was interested in the new principles, even if sceptical voices cautioned against these American ideas. Outside these circles, the Danish unions and employers’ organizations supported the intentions to modernize what they considered an expensive link in the retail trade. The gain in productivity pursued by the industry was considered to depend not only on increasing consumption, but also on standardized goods and mass consumption.

  12. Revolution i detailhandlen? Om Marshall-plan, studierejser og selvbetjeningsbutikker.

    Directory of Open Access Journals (Sweden)

    Sissel Bjerrum Fossat

    2013-11-01

    Full Text Available Artiklen undersøger, hvordan udbredelsen af selvbetjeningsbutikker i Danmark var en del af Marshall-planens målsætning. Ved at fokusere på en af de rejser om selvbetjening, der blev arrangeret i Marshall-regi, kan det vises, hvordan oprettelsen af selvbetjeningsbutikker både var i overensstemmelse med amerikanske og danske ønsker. I den danske detailhandel var især kooperationen interesseret i de nye principper, men der fandtes også skeptiske stemmer, der advarede mod de amerikanske ideer.AbstractThe article explores how the dissemination of self-service shops in Denmark was an integral part of the Marshall Plan. Focusing on one of those journeys under the auspices of the Marshall Plan to study such self-service shops in the USA, the article shows how the creation of self-service shops was in accordance with American as well as Danish aspirations. In the Danish retailing business, particularly the cooperative movement was interested in the new principles, even if sceptical voices cautioned against these American ideas. Outside these circles, the Danish unions and employers’ organizations supported the intentions to modernize what they considered an expensive link in the retail trade. The gain in productivity pursued by the industry was considered to depend not only on increasing consumption, but also on standardized goods and mass consumption.

  13. Towards Modelling of Hybrid Systems

    DEFF Research Database (Denmark)

    Wisniewski, Rafal

    2006-01-01

    The article is an attempt to use methods of category theory and topology for analysis of hybrid systems. We use the notion of a directed topological space; it is a topological space together with a set of privileged paths. Dynamical systems are examples of directed topological spaces. A hybrid...... system consists of a number of dynamical systems that are glued together according to information encoded in the discrete part of the system. We develop a definition of a hybrid system as a functor from the category generated by a transition system to the category of directed topological spaces. Its...... directed homotopy colimit (geometric realization) is a single directed topological space. The behavior of hybrid systems can be then understood in terms of the behavior of dynamical systems through the directed homotopy colimit....

  14. Advances in the spatially distributed ages-w model: parallel computation, java connection framework (JCF) integration, and streamflow/nitrogen dynamics assessment

    Science.gov (United States)

    AgroEcoSystem-Watershed (AgES-W) is a modular, Java-based spatially distributed model which implements hydrologic and water quality (H/WQ) simulation components under the Java Connection Framework (JCF) and the Object Modeling System (OMS) environmental modeling framework. AgES-W is implicitly scala...

  15. Service systems concepts, modeling, and programming

    CERN Document Server

    Cardoso, Jorge; Poels, Geert

    2014-01-01

    This SpringerBrief explores the internal workings of service systems. The authors propose a lightweight semantic model for an effective representation to capture the essence of service systems. Key topics include modeling frameworks, service descriptions and linked data, creating service instances, tool support, and applications in enterprises.Previous books on service system modeling and various streams of scientific developments used an external perspective to describe how systems can be integrated. This brief introduces the concept of white-box service system modeling as an approach to mo

  16. Hydrological modelling in forested systems

    Science.gov (United States)

    This chapter provides a brief overview of forest hydrology modelling approaches for answering important global research and management questions. Many hundreds of hydrological models have been applied globally across multiple decades to represent and predict forest hydrological p...

  17. Modeling, Control and Coordination of Helicopter Systems

    CERN Document Server

    Ren, Beibei; Chen, Chang; Fua, Cheng-Heng; Lee, Tong Heng

    2012-01-01

    Modeling, Control and Coordination of Helicopter Systems provides a comprehensive treatment of helicopter systems, ranging from related nonlinear flight dynamic modeling and stability analysis to advanced control design for single helicopter systems, and also covers issues related to the coordination and formation control of multiple helicopter systems to achieve high performance tasks. Ensuring stability in helicopter flight is a challenging problem for nonlinear control design and development. This book is a valuable reference on modeling, control and coordination of helicopter systems,providing readers with practical solutions for the problems that still plague helicopter system design and implementation. Readers will gain a complete picture of helicopters at the systems level, as well as a better understanding of the technical intricacies involved. This book also: Presents a complete picture of modeling, control and coordination for helicopter systems Provides a modeling platform for a general class of ro...

  18. Electronic Education System Model-2

    Science.gov (United States)

    Güllü, Fatih; Kuusik, Rein; Laanpere, Mart

    2015-01-01

    In this study we presented new EES Model-2 extended from EES model for more productive implementation in e-learning process design and modelling in higher education. The most updates were related to uppermost instructional layer. We updated learning processes object of the layer for adaptation of educational process for young and old people,…

  19. Network and adaptive system of systems modeling and analysis.

    Energy Technology Data Exchange (ETDEWEB)

    Lawton, Craig R.; Campbell, James E. Dr. (.; .); Anderson, Dennis James; Eddy, John P.

    2007-05-01

    This report documents the results of an LDRD program entitled ''Network and Adaptive System of Systems Modeling and Analysis'' that was conducted during FY 2005 and FY 2006. The purpose of this study was to determine and implement ways to incorporate network communications modeling into existing System of Systems (SoS) modeling capabilities. Current SoS modeling, particularly for the Future Combat Systems (FCS) program, is conducted under the assumption that communication between the various systems is always possible and occurs instantaneously. A more realistic representation of these communications allows for better, more accurate simulation results. The current approach to meeting this objective has been to use existing capabilities to model network hardware reliability and adding capabilities to use that information to model the impact on the sustainment supply chain and operational availability.

  20. On Verification Modelling of Embedded Systems

    NARCIS (Netherlands)

    Brinksma, Ed; Mader, Angelika

    2004-01-01

    Computer-aided verification of embedded systems hinges on the availability of good verification models of the systems at hand. Such models must be much simpler than full design models or specifications to be of practical value, because of the unavoidable combinatorial complexities in the verificatio

  1. Applying Modeling Tools to Ground System Procedures

    Science.gov (United States)

    Di Pasquale, Peter

    2012-01-01

    As part of a long-term effort to revitalize the Ground Systems (GS) Engineering Section practices, Systems Modeling Language (SysML) and Business Process Model and Notation (BPMN) have been used to model existing GS products and the procedures GS engineers use to produce them.

  2. Estimation of the multidimensional transient functions oculo-motor system of human

    Science.gov (United States)

    Pavlenko, Vitaliy; Salata, Dmytro; Dombrovskyi, Mykola; Maksymenko, Yuri

    2017-09-01

    Proposed a new method of constructing nonparametric dynamic models of the oculomotor system system (OMS) in the form of human multidimensional transition functions on the basis of experimental data "input-output". As the test signals used bright points on the long duration of the computer screen. OMS response is measured using information technology Eye-tracking and recorded on video. As a result data processing of the experiment we receive function based "pupil coordinate - time". Using the method of least squares (Ordinary Least Squares, OLS) defined transition functions of the first, second and third order - integral transformations of Volterra kernels, representing a model of OMS. Completed experimental studies using computer simulations confirm the adequacy of the constructed approximation model as a real system.

  3. System Level Modelling and Performance Estimation of Embedded Systems

    DEFF Research Database (Denmark)

    Tranberg-Hansen, Anders Sejer

    is simulation based and allows performance estimation to be carried out throughout all design phases ranging from early functional to cycle accurate and bit true descriptions of the system, modelling both hardware and software components in a unied way. Design space exploration and performance estimation...... an efficient system level design methodology, a modelling framework for performance estimation and design space exploration at the system level is required. This thesis presents a novel component based modelling framework for system level modelling and performance estimation of embedded systems. The framework...... is performed by having the framework produce detailed quantitative information about the system model under investigation. The project is part of the national Danish research project, Danish Network of Embedded Systems (DaNES), which is funded by the Danish National Advanced Technology Foundation. The project...

  4. EXPOSURE ANALYSIS MODELING SYSTEM (EXAMS): USER MANUAL AND SYSTEM DOCUMENTATION

    Science.gov (United States)

    The Exposure Analysis Modeling System, first published in 1982 (EPA-600/3-82-023), provides interactive computer software for formulating aquatic ecosystem models and rapidly evaluating the fate, transport, and exposure concentrations of synthetic organic chemicals - pesticides, ...

  5. Pǎun's systems as models of economic systems

    Institute of Scientific and Technical Information of China (English)

    Waldemar Korczynski

    2007-01-01

    In the paper a concept for modeling the economic systems by the formalism of Pǎun's systems is proposed. The main idea is to represent economic systems as homomorphic images of Petri nets corresponding to the (super) cells of Pǎun's systems.

  6. Optimal Vehicle Design Using the Integrated System and Cost Modeling Tool Suite

    Science.gov (United States)

    2010-08-01

    Space Vehicle Costing ( ACEIT ) • New Small Sat Model Development & Production Cost O&M Cost Module  Radiation Exposure  Radiation Detector Response...Reliability OML Availability Risk l l Tools CEA, SRM Model, POST, ACEIT , Inflation Model, Rotor Blade Des, Microsoft Project, ATSV, S/1-iABP...space STK, SOAP – Specific mission • Space Vehicle Design (SMAD) • Space Vehicle Propulsion • Orbit Propagation • Space Vehicle Costing ( ACEIT ) • New

  7. Principles for scaling of distributed direct potable water reuse systems: a modeling study.

    Science.gov (United States)

    Guo, Tianjiao; Englehardt, James D

    2015-05-15

    Scaling of direct potable water reuse (DPR) systems involves tradeoffs of treatment facility economy-of-scale, versus cost and energy of conveyance including energy for upgradient distribution of treated water, and retention of wastewater thermal energy. In this study, a generalized model of the cost of DPR as a function of treatment plant scale, assuming futuristic, optimized conveyance networks, was constructed for purposes of developing design principles. Fractal landscapes representing flat, hilly, and mountainous topographies were simulated, with urban, suburban, and rural housing distributions placed by modified preferential growth algorithm. Treatment plants were allocated by agglomerative hierarchical clustering, networked to buildings by minimum spanning tree. Simulations assume advanced oxidation-based DPR system design, with 20-year design life and capability to mineralize chemical oxygen demand below normal detection limits, allowing implementation in regions where disposal of concentrate containing hormones and antiscalants is not practical. Results indicate that total DPR capital and O&M costs in rural areas, where systems that return nutrients to the land may be more appropriate, are high. However, costs in urban/suburban areas are competitive with current water/wastewater service costs at scales of ca. one plant per 10,000 residences. This size is relatively small, and costs do not increase significantly until plant service areas fall below 100 to 1000 homes. Based on these results, distributed DPR systems are recommended for consideration for urban/suburban water and wastewater system capacity expansion projects.

  8. Modeling Control Situations in Power System Operations

    DEFF Research Database (Denmark)

    Saleem, Arshad; Lind, Morten; Singh, Sri Niwas

    2010-01-01

    Increased interconnection and loading of the power system along with deregulation has brought new challenges for electric power system operation, control and automation. Traditional power system models used in intelligent operation and control are highly dependent on the task purpose. Thus, a model...... for intelligent operation and control must represent system features, so that information from measurements can be related to possible system states and to control actions. These general modeling requirements are well understood, but it is, in general, difficult to translate them into a model because of the lack...... of explicit principles for model construction. This paper presents a work on using explicit means-ends model based reasoning about complex control situations which results in maintaining consistent perspectives and selecting appropriate control action for goal driven agents. An example of power system...

  9. Modeling Control Situations in Power System Operations

    DEFF Research Database (Denmark)

    Saleem, Arshad; Lind, Morten; Singh, Sri Niwas

    2010-01-01

    Increased interconnection and loading of the power system along with deregulation has brought new challenges for electric power system operation, control and automation. Traditional power system models used in intelligent operation and control are highly dependent on the task purpose. Thus, a model...... for intelligent operation and control must represent system features, so that information from measurements can be related to possible system states and to control actions. These general modeling requirements are well understood, but it is, in general, difficult to translate them into a model because of the lack...... of explicit principles for model construction. This paper presents a work on using explicit means-ends model based reasoning about complex control situations which results in maintaining consistent perspectives and selecting appropriate control action for goal driven agents. An example of power system...

  10. Increased prevalence of autoimmune disorders and autoantibodies in parents of children with opsoclonus-myoclonus syndrome (OMS).

    Science.gov (United States)

    Krasenbrink, I; Fühlhuber, V; Juhasz-Boess, I; Stolz, E; Hahn, A; Kaps, M; Hero, B; Blaes, F

    2007-06-01

    Opsoclonus-myoclonus syndrome (OMS) is a rare neurological disease in childhood which can be associated with neuroblastoma. Since autoantibodies have been detected in some patients with OMS, an autoimmune etiology is suspected. We compared the prevalence of autoimmune disorders and autoantibodies in parents of children with OMS and in a group of controls of same age and sex. Autoimmune diseases were found in 15.8% of the parents of OMS children, but only in 2.0% of the controls (pOMS parents (42.8% vs. 8.0%, pOMS parents also had significantly more autoantibodies against CNS structures than the controls (pOMS and may also hint to a genetic susceptibility for OMS.

  11. Modeling noisy resonant system response

    Science.gov (United States)

    Weber, Patrick Thomas; Walrath, David Edwin

    2017-02-01

    In this paper, a theory-based model replicating empirical acoustic resonant signals is presented and studied to understand sources of noise present in acoustic signals. Statistical properties of empirical signals are quantified and a noise amplitude parameter, which models frequency and amplitude-based noise, is created, defined, and presented. This theory-driven model isolates each phenomenon and allows for parameters to be independently studied. Using seven independent degrees of freedom, this model will accurately reproduce qualitative and quantitative properties measured from laboratory data. Results are presented and demonstrate success in replicating qualitative and quantitative properties of experimental data.

  12. Generic Model Host System Design

    Energy Technology Data Exchange (ETDEWEB)

    Chu, Chungming; /SLAC; Wu, Juhao; /SLAC; Qiang, Ji; /LBL, Berkeley; Shen, Guobao; /Brookhaven

    2012-06-22

    There are many simulation codes for accelerator modelling; each one has some strength but not all. A platform which can host multiple modelling tools would be ideal for various purposes. The model platform along with infrastructure support can be used not only for online applications but also for offline purposes. Collaboration is formed for the effort of providing such a platform. In order to achieve such a platform, a set of common physics data structure has to be set. Application Programming Interface (API) for physics applications should also be defined within a model data provider. A preliminary platform design and prototype is discussed.

  13. Four MATLAB-Simulink models ofphotovoltaic system

    Directory of Open Access Journals (Sweden)

    Jawad Radhi Mahmood, Nasir Hussein Selman

    2016-01-01

    Full Text Available This paper presents four different MATLAB models to simulate the output I-V and P-V characteristics of photovoltaic (PV cells or systems. All of the models are implemented with Matlab-Simulink. Detailed modeling procedure for one-diode equivalent circuit model with all equations and numerical values is presented. The parameters required for the modeling have been taken from manufacturer's datasheet for 240W SOLIMPEKS solar panel. I-V and P-V characteristics of a typical 1.92 kW PV system have been simulated using the proposed models. The simulation took into account the sunlight insolation and temperature effect. Results of the models are validated with I-V and P-V curves provided by the manufacturer(s. The proposed models are very useful for those interested in working in the field of solar systems because they emulate and analyze the characteristics of all the solar systems easily.

  14. CTL Model Update for System Modifications

    CERN Document Server

    Ding, Yulin; Zhang, Yan; Zhang, Y; 10.1613/jair.2420

    2011-01-01

    Model checking is a promising technology, which has been applied for verification of many hardware and software systems. In this paper, we introduce the concept of model update towards the development of an automatic system modification tool that extends model checking functions. We define primitive update operations on the models of Computation Tree Logic (CTL) and formalize the principle of minimal change for CTL model update. These primitive update operations, together with the underlying minimal change principle, serve as the foundation for CTL model update. Essential semantic and computational characterizations are provided for our CTL model update approach. We then describe a formal algorithm that implements this approach. We also illustrate two case studies of CTL model updates for the well-known microwave oven example and the Andrew File System 1, from which we further propose a method to optimize the update results in complex system modifications.

  15. Computational Models for Nonlinear Aeroelastic Systems Project

    Data.gov (United States)

    National Aeronautics and Space Administration — Clear Science Corp. and Duke University propose to develop and demonstrate new and efficient computational methods of modeling nonlinear aeroelastic systems. The...

  16. Model Updating Nonlinear System Identification Toolbox Project

    Data.gov (United States)

    National Aeronautics and Space Administration — ZONA Technology (ZONA) proposes to develop an enhanced model updating nonlinear system identification (MUNSID) methodology that utilizes flight data with...

  17. Modeling and analysis of biomass production systems

    Energy Technology Data Exchange (ETDEWEB)

    Mishoe, J.W.; Lorber, M.N.; Peart, R.M.; Fluck, R.C.; Jones, J.W.

    1984-01-01

    BIOMET is an interactive simulation model that is used to analyze specific biomass and methane production systems. The system model is composed of crop growth models, harvesting, transportation, conversion and economic submodels. By use of menus the users can configure the structure and set selected parameters of the system to analyze the effects of variables within the component models. For example, simulations of a water hyacinth system resulted in yields of 63, 48 and 37 mg/ha/year for different harvest schedules. For napier grass, unit methane costs were $3.04, $2.86 and $2.98 for various yields of biomass. 10 references.

  18. Error Propagation in a System Model

    Science.gov (United States)

    Schloegel, Kirk (Inventor); Bhatt, Devesh (Inventor); Oglesby, David V. (Inventor); Madl, Gabor (Inventor)

    2015-01-01

    Embodiments of the present subject matter can enable the analysis of signal value errors for system models. In an example, signal value errors can be propagated through the functional blocks of a system model to analyze possible effects as the signal value errors impact incident functional blocks. This propagation of the errors can be applicable to many models of computation including avionics models, synchronous data flow, and Kahn process networks.

  19. Hydrological modeling in forested systems

    Science.gov (United States)

    H.E. Golden; G.R. Evenson; S. Tian; Devendra Amatya; Ge Sun

    2015-01-01

    Characterizing and quantifying interactions among components of the forest hydrological cycle is complex and usually requires a combination of field monitoring and modelling approaches (Weiler and McDonnell, 2004; National Research Council, 2008). Models are important tools for testing hypotheses, understanding hydrological processes and synthesizing experimental data...

  20. Stochastic Modelling of Energy Systems

    DEFF Research Database (Denmark)

    Andersen, Klaus Kaae

    2001-01-01

    equations are expressed in terms of stochastic differential equations. From a theoretical viewpoint the techniques for experimental design, parameter estimation and model validation are considered. From the practical viewpoint emphasis is put on how this methods can be used to construct models adequate...

  1. Stochastic Modelling of Hydrologic Systems

    DEFF Research Database (Denmark)

    Jonsdottir, Harpa

    2007-01-01

    In this PhD project several stochastic modelling methods are studied and applied on various subjects in hydrology. The research was prepared at Informatics and Mathematical Modelling at the Technical University of Denmark. The thesis is divided into two parts. The first part contains an introduct......In this PhD project several stochastic modelling methods are studied and applied on various subjects in hydrology. The research was prepared at Informatics and Mathematical Modelling at the Technical University of Denmark. The thesis is divided into two parts. The first part contains...... an introduction and an overview of the papers published. Then an introduction to basic concepts in hydrology along with a description of hydrological data is given. Finally an introduction to stochastic modelling is given. The second part contains the research papers. In the research papers the stochastic methods...

  2. Hypervirial Models of Stellar Systems

    CERN Document Server

    Evans, N W

    2005-01-01

    A family of cusped potential-density pairs is introduced for modelling galaxies and dark haloes. The density profile is cusped like 1/r^(2-p) at small radii. The distribution function takes the simple form L^(p-2) E^([3p+1]/2) (where E is the binding energy and L is the angular momentum). The models all possess the remarkable property that the virial theorem holds locally, from which they earn their name as the hypervirial family. Famously, this property was first discovered by Eddington to hold for the Plummer model in 1916. In fact, the seductive properties of the Plummer model extend to the whole hypervirial family, including the members possessing the cosmologically important cusps with density behaving like 1/r or 1/r^1.5 or 1/r^1.33. The intrinsic and projected properties of the family of models are discussed in some detail.

  3. Semantic models for adaptive interactive systems

    CERN Document Server

    Hussein, Tim; Lukosch, Stephan; Ziegler, Jürgen; Calvary, Gaëlle

    2013-01-01

    Providing insights into methodologies for designing adaptive systems based on semantic data, and introducing semantic models that can be used for building interactive systems, this book showcases many of the applications made possible by the use of semantic models.Ontologies may enhance the functional coverage of an interactive system as well as its visualization and interaction capabilities in various ways. Semantic models can also contribute to bridging gaps; for example, between user models, context-aware interfaces, and model-driven UI generation. There is considerable potential for using

  4. Model reduction of linear conservative mechanical systems

    NARCIS (Netherlands)

    Schaft, van der A.J.; Oeloff, J.E.

    1990-01-01

    An approach for model reduction of linear conservative or weakly damped mechanical systems is proposed. It is based on the balancing of an associated gradient system. It uses the joint knowledge of the system matrix and the input and output matrices of the Hamiltonian system. The key idea is to asso

  5. Modeling complex work systems - method meets reality

    OpenAIRE

    Veer, van der, C.G.; Hoeve, Machteld; Lenting, Bert F.

    1996-01-01

    Modeling an existing task situation is often a first phase in the (re)design of information systems. For complex systems design, this model should consider both the people and the organization involved, the work, and situational aspects. Groupware Task Analysis (GTA) as part of a method for the design of complex systems, has been applied in a situation of redesign of a Dutch public administration system. The most feasible method to collect information in this case was ethnography, the resulti...

  6. Spectroscopic Investigation of O-,M-, and P-Cyanostyrenes

    Science.gov (United States)

    Korn, Joseph A.; Knezz, Stephanie N.; McMahon, Robert J.; Zwier, Timothy S.

    2014-06-01

    The atmosphere of Titan contains nitrogen, methane, and a rich mixture of more complex hydrocarbons and nitriles produced by photochemical processing. Data from the 2005 Cassini-Huygens mission suggests that among the more complex compounds are substituted benzenes that are themselves precursors to large polymeric tholins. Nitriles are particularly prevalent in Titan's atmosphere due to the dominance of N2 in the atmosphere. The cyanostyrenes are of particular interest, in part because they have the same molecular formula (C9H7N) as quinoline, a prototypical heteroaromatic, and therefore could engage in photochemical isomerization to form this molecule of significant pre-biotic relevance. As a first step in understanding the pathways leading to heteroaromatics, we have studied the isotope-selective spectroscopy of o-,m-, and p-cyanostyrene under jet-cooled conditions relevant to Titan's atmosphere. In this talk, the excitation and emission spectra for the three isomers will be presented. Using a combination of resonant two-photon ionization, LIF excitation, and dispersed fluorescence spectroscopies, the vibronic spectroscopy of the three isomers were recorded and compared. The meta isomer has two conformational isomers, which have been distinguished and studied using hole-burning methods. The talk will compare and contrast the UV spectral signatures of the set of structural and conformational isomers of the cyanostyrenes, using the ethynylstyrene counterparts as points of comparison. Sebree, J. A.; Kidwell, N. M.; Selby, T. M.; Amberger, B. K.; McMahon, R. J.; Zwier, T. S., Photochemistry of Benzylallene: Ring-Closing Reactions to Form Naphthalene. Journal of the American Chemical Society 2012, 134 (2), 1153-1163. Selby, T. M.; Clarkson, J. R.; Mitchell, D.; Fitzpatrick, J. A. J.; Lee, H. D.; Pratt, D. W.; Zwier, T. S., Isomer-Specific Spectroscopy and Conformational Isomerization Energetics of o-, m-, and p-Ethynylstyrenes. The Journal of Physical Chemistry A 2005

  7. Modeling of power electronic systems with EMTP

    Science.gov (United States)

    Tam, Kwa-Sur; Dravid, Narayan V.

    1989-01-01

    In view of the potential impact of power electronics on power systems, there is need for a computer modeling/analysis tool to perform simulation studies on power systems with power electronic components as well as to educate engineering students about such systems. The modeling of the major power electronic components of the NASA Space Station Freedom Electric Power System is described along with ElectroMagnetic Transients Program (EMTP) and it is demonstrated that EMTP can serve as a very useful tool for teaching, design, analysis, and research in the area of power systems with power electronic components. EMTP modeling of power electronic circuits is described and simulation results are presented.

  8. Models of the venous system

    DEFF Research Database (Denmark)

    Mehlsen, J

    2000-01-01

    of the venous system require at least three elements: a resistor, a capacitor and an inductor, with the latter being of more importance in the venous than in the arterial system. Non-linearities must be considered in pressure/flow relations in the small venules, during venous collapse, or low flow conditions...

  9. Kortisonskepsis : En studie om holdninger til kortisonkrem blant foreldre av barn med atopisk eksem

    OpenAIRE

    Gustavsen, Hanne Engstrøm

    2010-01-01

    Bakgrunn: Kortisonkremer er en viktig del av behandlingen mot atopisk eksem. Mange foreldre er skeptiske til bruken av kortisonkremer, fordi de har lest eller hørt om bivirkninger. Pasienters og pårørendes holdninger til bruk av kortisonkrem kan påvirke gjennomføringen av behandlingen. Formål: Vi ønsket å undersøke holdninger til bruk av kortisonkrem blant foreldre og pårørende av barn med atopisk eksem. Vi ville også undersøke om det er en sammenheng mellom kunnskapsnivå om kortisonkreme...

  10. Wood source and pyrolysis temperature interact to control PyOM degradation rates

    Science.gov (United States)

    Bird, J. A.; Hatton, P. J.; Filley, T. R.; Chatterjee, S.; Auclerc, A.; Gormley, M.; Dastmalchi, K.; Stark, R. E.; Nadelhoffer, K. J.

    2015-12-01

    Surprisingly little is known about how shifts in tree species composition and increased forest fire frequency and intensity will affect one of the most stable pools of soil organic matter, i.e. the pyrogenic organic matter (PyOM or char). In a previous study, we showed that wood source and pyrolysis temperature interact to control PyOM structure and potential reactivity for two tree species common in high-latitude forests, jack pine (JP) and red maple (RM). Here, we investigate whether these differences affect PyOM turnover by examining the fates of 13C/15N-enriched JP wood and PyOM pyrolyzed at 300 (JP300) and 450 °C (JP450) and RM pyrolyzed at 450 °C (RM450). The substrates were applied 1-3 cm below the O/A interface of a well-drained Spodosol in a long-term forest fire study located at the University of Michigan Biological Station (Pellston, MI, USA). 13C-CO2effluxes from the first 996 days of decay showed a significant wood source by pyrolysis temperature interaction on PyOM field mineralisation rates, with RM450 mineralising twice faster than JP450 during the first 90 days. Increasing pyrolysis temperature substantially decreased field mineralization rates during the first 996 days, with mineralisation rates 24 and 80 times slower for JP300 and JP450 compared with JP wood. After 1 year, (i) bacterial groups were large sinks for PyOM-derived C as pyrolysis temperature increased and as substrate use efficiency decreased; (ii) potential phenol oxidase and net peroxidase activities were unaffected by the PyOM addition, although net peroxidase activities measured tended to lesser for soils amended with JP450 and RM450; and (iii) Collembola detritivores appeared less likely to be found for soils amended with JP450 and RM450. PyOM-derived C and N recoveries did not differ after 1 year; we will present 3-y recovery data. Our results suggest that the composition of angiosperms (e.g. RM) and gymnosperms (e.g. JP) in high-latitude forests is an underappreciated but

  11. Determinantes sociales de la salud de la OMS en mujeres mexicanas con el virus de papiloma

    OpenAIRE

    Soltero-Rivera, Silvia Guadalupe; Cerda-Flores, Ricardo Martin; Cárdenas-Villarreal, Velia Margarita; Guevara-Valtier, Milton Carlos; Paz Morales, María de los Angeles; Patton-Leal, Adrián Carlos; Ramírez-García, Esther Justina

    2016-01-01

    Uno de los temas centrales de la OMS es el análisis de los problemas de salud mediante el modelo de Determinantes Sociales de la Salud (DSS: inadecuadas condiciones económicas, ambientales y de alimentación). El sistema sanitario de la OMS ha asociado algunas enfermedades tal como el Virus de Papiloma Humano (VPH) con losDSS. Desde el punto de vista de investigación cuantitativa, los DSS reportados por la OMS son: 1) edad de inicio de la actividad sexual, 2) múltiples compañeros sexuales, 3) ...

  12. 隐钾锰矿(K-OMS-2)的人工合成与表征

    Institute of Scientific and Technical Information of China (English)

    刘金华; 付廷明

    2009-01-01

    回流法制备了隐钾锰矿型氧化锰八面体分子筛(OMS-2),并对合成的OMS-2进行了XRD、SEM、BET表征,结果表明,通过酸回流方法制备的氧化锰材料具有典型的隐钾锰矿结构,合成的锰系微孔材料OMS-2具有纳米棒状结构,BET显示其具有微孔结构.

  13. Role of inflammation in the relationship between OM and regeneration of optic nerves

    Directory of Open Access Journals (Sweden)

    Lin-Kun Ma

    2017-07-01

    Full Text Available Oncomodulin(OMis known by us progressively as a Calcium binding protein. Recently, OM has been found that it is secreted by inflammatory cells(neutrophilic granulocyte, and a signal which can promote cell growth between innate immunity and neurons, and a key to regenerate the damaged optical nerves by activating inflammation. The function of promoting the regeneration progress of axons has become a hot issue in recent years. This article summarized the mechanism of OM and the relationship between inflammation-induced OM and optic nerve regeneration research and progress were reviewed.

  14. Learning Markov models for stationary system behaviors

    DEFF Research Database (Denmark)

    Chen, Yingke; Mao, Hua; Jaeger, Manfred

    2012-01-01

    Establishing an accurate model for formal verification of an existing hardware or software system is often a manual process that is both time consuming and resource demanding. In order to ease the model construction phase, methods have recently been proposed for automatically learning accurate...... system models from data in the form of observations of the target system. Common for these approaches is that they assume the data to consist of multiple independent observation sequences. However, for certain types of systems, in particular many running embedded systems, one would only have access...... the learned model. Experiments demonstrate that system properties (formulated as stationary probabilities of LTL formulas) can be reliably identified using the learned model....

  15. Integrating systems biology models and biomedical ontologies

    Directory of Open Access Journals (Sweden)

    de Bono Bernard

    2011-08-01

    Full Text Available Abstract Background Systems biology is an approach to biology that emphasizes the structure and dynamic behavior of biological systems and the interactions that occur within them. To succeed, systems biology crucially depends on the accessibility and integration of data across domains and levels of granularity. Biomedical ontologies were developed to facilitate such an integration of data and are often used to annotate biosimulation models in systems biology. Results We provide a framework to integrate representations of in silico systems biology with those of in vivo biology as described by biomedical ontologies and demonstrate this framework using the Systems Biology Markup Language. We developed the SBML Harvester software that automatically converts annotated SBML models into OWL and we apply our software to those biosimulation models that are contained in the BioModels Database. We utilize the resulting knowledge base for complex biological queries that can bridge levels of granularity, verify models based on the biological phenomenon they represent and provide a means to establish a basic qualitative layer on which to express the semantics of biosimulation models. Conclusions We establish an information flow between biomedical ontologies and biosimulation models and we demonstrate that the integration of annotated biosimulation models and biomedical ontologies enables the verification of models as well as expressive queries. Establishing a bi-directional information flow between systems biology and biomedical ontologies has the potential to enable large-scale analyses of biological systems that span levels of granularity from molecules to organisms.

  16. Integrating systems biology models and biomedical ontologies

    Science.gov (United States)

    2011-01-01

    Background Systems biology is an approach to biology that emphasizes the structure and dynamic behavior of biological systems and the interactions that occur within them. To succeed, systems biology crucially depends on the accessibility and integration of data across domains and levels of granularity. Biomedical ontologies were developed to facilitate such an integration of data and are often used to annotate biosimulation models in systems biology. Results We provide a framework to integrate representations of in silico systems biology with those of in vivo biology as described by biomedical ontologies and demonstrate this framework using the Systems Biology Markup Language. We developed the SBML Harvester software that automatically converts annotated SBML models into OWL and we apply our software to those biosimulation models that are contained in the BioModels Database. We utilize the resulting knowledge base for complex biological queries that can bridge levels of granularity, verify models based on the biological phenomenon they represent and provide a means to establish a basic qualitative layer on which to express the semantics of biosimulation models. Conclusions We establish an information flow between biomedical ontologies and biosimulation models and we demonstrate that the integration of annotated biosimulation models and biomedical ontologies enables the verification of models as well as expressive queries. Establishing a bi-directional information flow between systems biology and biomedical ontologies has the potential to enable large-scale analyses of biological systems that span levels of granularity from molecules to organisms. PMID:21835028

  17. Very Large System Dynamics Models - Lessons Learned

    Energy Technology Data Exchange (ETDEWEB)

    Jacob J. Jacobson; Leonard Malczynski

    2008-10-01

    This paper provides lessons learned from developing several large system dynamics (SD) models. System dynamics modeling practice emphasize the need to keep models small so that they are manageable and understandable. This practice is generally reasonable and prudent; however, there are times that large SD models are necessary. This paper outlines two large SD projects that were done at two Department of Energy National Laboratories, the Idaho National Laboratory and Sandia National Laboratories. This paper summarizes the models and then discusses some of the valuable lessons learned during these two modeling efforts.

  18. Precipitation-runoff modeling system; user's manual

    Science.gov (United States)

    Leavesley, G.H.; Lichty, R.W.; Troutman, B.M.; Saindon, L.G.

    1983-01-01

    The concepts, structure, theoretical development, and data requirements of the precipitation-runoff modeling system (PRMS) are described. The precipitation-runoff modeling system is a modular-design, deterministic, distributed-parameter modeling system developed to evaluate the impacts of various combinations of precipitation, climate, and land use on streamflow, sediment yields, and general basin hydrology. Basin response to normal and extreme rainfall and snowmelt can be simulated to evaluate changes in water balance relationships, flow regimes, flood peaks and volumes, soil-water relationships, sediment yields, and groundwater recharge. Parameter-optimization and sensitivity analysis capabilites are provided to fit selected model parameters and evaluate their individual and joint effects on model output. The modular design provides a flexible framework for continued model system enhancement and hydrologic modeling research and development. (Author 's abstract)

  19. Network model of security system

    Directory of Open Access Journals (Sweden)

    Adamczyk Piotr

    2016-01-01

    Full Text Available The article presents the concept of building a network security model and its application in the process of risk analysis. It indicates the possibility of a new definition of the role of the network models in the safety analysis. Special attention was paid to the development of the use of an algorithm describing the process of identifying the assets, vulnerability and threats in a given context. The aim of the article is to present how this algorithm reduced the complexity of the problem by eliminating from the base model these components that have no links with others component and as a result and it was possible to build a real network model corresponding to reality.

  20. Evaluation Model of System Survivability

    Institute of Scientific and Technical Information of China (English)

    LIU Yuling; PAN Shiying; TIAN Junfeng

    2006-01-01

    This paper puts forward a survivability evaluation model, SQEM(Survivability Quantitative Evaluation Model), based on lucubrating the main method existed. Then it defines the measurement factors and parses the survivability mathematically, introduces state change probability and the idea of setting the weights of survivability factors dynamically into the evaluating process of SQEM, which improved the accuracy of evaluation. An example is presented to illustrate the way SQEM works, which demonstrated the validity and feasibility of the method.

  1. Brief history of agricultural systems modeling.

    Science.gov (United States)

    Jones, James W; Antle, John M; Basso, Bruno; Boote, Kenneth J; Conant, Richard T; Foster, Ian; Godfray, H Charles J; Herrero, Mario; Howitt, Richard E; Janssen, Sander; Keating, Brian A; Munoz-Carpena, Rafael; Porter, Cheryl H; Rosenzweig, Cynthia; Wheeler, Tim R

    2017-07-01

    Agricultural systems science generates knowledge that allows researchers to consider complex problems or take informed agricultural decisions. The rich history of this science exemplifies the diversity of systems and scales over which they operate and have been studied. Modeling, an essential tool in agricultural systems science, has been accomplished by scientists from a wide range of disciplines, who have contributed concepts and tools over more than six decades. As agricultural scientists now consider the "next generation" models, data, and knowledge products needed to meet the increasingly complex systems problems faced by society, it is important to take stock of this history and its lessons to ensure that we avoid re-invention and strive to consider all dimensions of associated challenges. To this end, we summarize here the history of agricultural systems modeling and identify lessons learned that can help guide the design and development of next generation of agricultural system tools and methods. A number of past events combined with overall technological progress in other fields have strongly contributed to the evolution of agricultural system modeling, including development of process-based bio-physical models of crops and livestock, statistical models based on historical observations, and economic optimization and simulation models at household and regional to global scales. Characteristics of agricultural systems models have varied widely depending on the systems involved, their scales, and the wide range of purposes that motivated their development and use by researchers in different disciplines. Recent trends in broader collaboration across institutions, across disciplines, and between the public and private sectors suggest that the stage is set for the major advances in agricultural systems science that are needed for the next generation of models, databases, knowledge products and decision support systems. The lessons from history should be

  2. Information modeling system for blast furnace control

    Science.gov (United States)

    Spirin, N. A.; Gileva, L. Y.; Lavrov, V. V.

    2016-09-01

    Modern Iron & Steel Works as a rule are equipped with powerful distributed control systems (DCS) and databases. Implementation of DSC system solves the problem of storage, control, protection, entry, editing and retrieving of information as well as generation of required reporting data. The most advanced and promising approach is to use decision support information technologies based on a complex of mathematical models. The model decision support system for control of blast furnace smelting is designed and operated. The basis of the model system is a complex of mathematical models created using the principle of natural mathematical modeling. This principle provides for construction of mathematical models of two levels. The first level model is a basic state model which makes it possible to assess the vector of system parameters using field data and blast furnace operation results. It is also used to calculate the adjustment (adaptation) coefficients of the predictive block of the system. The second-level model is a predictive model designed to assess the design parameters of the blast furnace process when there are changes in melting conditions relative to its current state. Tasks for which software is developed are described. Characteristics of the main subsystems of the blast furnace process as an object of modeling and control - thermal state of the furnace, blast, gas dynamic and slag conditions of blast furnace smelting - are presented.

  3. MODELING AND ANALYSIS OF REGIONAL BOUNDARY SYSTEM

    Institute of Scientific and Technical Information of China (English)

    YAN Guangle; WANG Huanchen

    2001-01-01

    In this paper, the problems of modeling and analyzing the system with change able boundary are researched. First, a kind of expanding system is set up, in which the changeable boundary is dealt with as a regional boundary. Then some relative models are developed to describe the regional boundary system. Next, the transition or the driftage of bifurcation points in the system is discussed. A fascinating case is studied in which two or more than two classes of chaotic attractive points coexist together or exist alternatively in the same system. Lastly, an effective new method of chaos avoidance for the system is put forward.

  4. Formal heterogeneous system modeling with SystemC

    DEFF Research Database (Denmark)

    Niaki, Seyed Hosein Attarzadeh; Jakobsen, Mikkel Koefoed; Sulonen, Tero;

    2012-01-01

    Electronic System Level (ESL) design of embedded systems proposes raising the abstraction level of the design entry to cope with the increasing complexity of such systems. To exploit the benefits of ESL, design languages should allow specification of models which are a) heterogeneous, to describe...... different aspects of systems; b) formally defined, for application of analysis and synthesis methods; c) executable, to enable early detection of specification; and d) parallel, to exploit the multi- and many-core platforms for simulation and implementation. We present a modeling library on top of System......C, targeting heterogeneous embedded system design, based on four models of computation. The library has a formal basis where all elements are well defined and lead in construction of analyzable models. The semantics of communication and computation are implemented by the library, which allows the designer...

  5. Grey Box Modelling of Hydrological Systems

    DEFF Research Database (Denmark)

    Thordarson, Fannar Ørn

    The main topic of the thesis is grey box modelling of hydrologic systems, as well as formulation and assessment of their embedded uncertainties. Grey box model is a combination of a white box model, a physically-based model that is traditionally formulated using deterministic ordinary differential...... the lack of fit in state space formulation, and further support decisions for a model expansion. By using stochastic differential equations to formulate the dynamics of the hydrological system, either the complexity of the model can be increased by including the necessary hydrological processes...... in the model, or formulation of process noise can be considered so that it meets the physical limits of the hydrological system and give an adequate description of the embedded uncertainty in model structure. The thesis consists of two parts: a summary report and a part which contains six scientific papers...

  6. A Model-Based Systems Engineering Methodology for Employing Architecture In System Analysis: Developing Simulation Models Using Systems Modeling Language Products to Link Architecture and Analysis

    Science.gov (United States)

    2016-06-01

    ENGINEERING METHODOLOGY FOR EMPLOYING ARCHITECTURE IN SYSTEM ANALYSIS: DEVELOPING SIMULATION MODELS USING SYSTEMS MODELING LANGUAGE PRODUCTS TO LINK... ENGINEERING METHODOLOGY FOR EMPLOYING ARCHITECTURE IN SYSTEM ANALYSIS: DEVELOPING SIMULATION MODELS USING SYSTEMS MODELING LANGUAGE PRODUCTS TO LINK...to model-based systems engineering (MBSE) by formally defining an MBSE methodology for employing architecture in system analysis (MEASA) that presents

  7. System Advisor Model: Flat Plate Photovoltaic Performance Modeling Validation Report

    Energy Technology Data Exchange (ETDEWEB)

    Freeman, J.; Whitmore, J.; Kaffine, L.; Blair, N.; Dobos, A. P.

    2013-12-01

    The System Advisor Model (SAM) is a free software tool that performs detailed analysis of both system performance and system financing for a variety of renewable energy technologies. This report provides detailed validation of the SAM flat plate photovoltaic performance model by comparing SAM-modeled PV system generation data to actual measured production data for nine PV systems ranging from 75 kW to greater than 25 MW in size. The results show strong agreement between SAM predictions and field data, with annualized prediction error below 3% for all fixed tilt cases and below 8% for all one axis tracked cases. The analysis concludes that snow cover and system outages are the primary sources of disagreement, and other deviations resulting from seasonal biases in the irradiation models and one axis tracking issues are discussed in detail.

  8. Modeling Cytoskeletal Active Matter Systems

    Science.gov (United States)

    Blackwell, Robert

    Active networks of filamentous proteins and crosslinking motor proteins play a critical role in many important cellular processes. One of the most important microtubule-motor protein assemblies is the mitotic spindle, a self-organized active liquid-crystalline structure that forms during cell division and that ultimately separates chromosomes into two daughter cells. Although the spindle has been intensively studied for decades, the physical principles that govern its self-organization and function remain mysterious. To evolve a better understanding of spindle formation, structure, and dynamics, I investigate course-grained models of active liquid-crystalline networks composed of microtubules, modeled as hard spherocylinders, in diffusive equilibrium with a reservoir of active crosslinks, modeled as hookean springs that can adsorb to microtubules and and translocate at finite velocity along the microtubule axis. This model is investigated using a combination of brownian dynamics and kinetic monte carlo simulation. I have further refined this model to simulate spindle formation and kinetochore capture in the fission yeast S. pombe. I then make predictions for experimentally realizable perturbations in motor protein presence and function in S. pombe.

  9. Systemic change increases model projection uncertainty

    NARCIS (Netherlands)

    Verstegen, Judith; Karssenberg, Derek; van der Hilst, Floortje; Faaij, André

    2014-01-01

    Most spatio-temporal models are based on the assumption that the relationship between system state change and its explanatory processes is stationary. This means that model structure and parameterization are usually kept constant over time, ignoring potential systemic changes in this relationship re

  10. Dynamic modeling of the INAPRO aquaponic system

    NARCIS (Netherlands)

    Karimanzira, Divas; Keesman, Karel J.; Kloas, Werner; Baganz, Daniela; Rauschenbach, Thomas

    2016-01-01

    The use of modeling techniques to analyze aquaponics systems is demonstrated with an example of dynamic modeling for the production of Nile tilapia (Oreochromis niloticus) and tomatoes (Solanum lycopersicon) using the innovative double recirculating aquaponic system ASTAF-PRO. For the management and

  11. Modeling complex work systems - method meets reality

    NARCIS (Netherlands)

    van der Veer, Gerrit C.; Hoeve, Machteld; Lenting, Bert

    1996-01-01

    Modeling an existing task situation is often a first phase in the (re)design of information systems. For complex systems design, this model should consider both the people and the organization involved, the work, and situational aspects. Groupware Task Analysis (GTA) as part of a method for the

  12. Modeling complex work systems - method meets reality

    NARCIS (Netherlands)

    Veer, van der Gerrit C.; Hoeve, Machteld; Lenting, Bert F.

    1996-01-01

    Modeling an existing task situation is often a first phase in the (re)design of information systems. For complex systems design, this model should consider both the people and the organization involved, the work, and situational aspects. Groupware Task Analysis (GTA) as part of a method for the desi

  13. System dynamics modelling of situation awareness

    CSIR Research Space (South Africa)

    Oosthuizen, R

    2015-11-01

    Full Text Available . The feedback loops and delays in the Command and Control system also contribute to the complex dynamic behavior. This paper will build on existing situation awareness models to develop a System Dynamics model to support a qualitative investigation through...

  14. Statistical Model Checking for Stochastic Hybrid Systems

    DEFF Research Database (Denmark)

    David, Alexandre; Du, Dehui; Larsen, Kim Guldstrand

    2012-01-01

    This paper presents novel extensions and applications of the UPPAAL-SMC model checker. The extensions allow for statistical model checking of stochastic hybrid systems. We show how our race-based stochastic semantics extends to networks of hybrid systems, and indicate the integration technique ap...

  15. Models of the venous system

    DEFF Research Database (Denmark)

    Mehlsen, J

    2000-01-01

    Cardiac output is largely controlled by venous return, the driving force of which is the energy remaining at the postcapillary venous site. This force is influenced by forces acting close to the right atrium, and internally or externally upon the veins along their course. Analogue models....... The venous capacitance is also non-linear, but may be considered linear under certain conditions. The models have to include time varying pressure sources created by respiration and skeletal muscles, and if the description includes the upright position, the partly unidirectional flow through the venous...

  16. Systematic modelling and simulation of refrigeration systems

    DEFF Research Database (Denmark)

    Rasmussen, Bjarne D.; Jakobsen, Arne

    1998-01-01

    The task of developing a simulation model of a refrigeration system can be very difficult and time consuming. In order for this process to be effective, a systematic method for developing the system model is required. This method should aim at guiding the developer to clarify the purpose of the s......The task of developing a simulation model of a refrigeration system can be very difficult and time consuming. In order for this process to be effective, a systematic method for developing the system model is required. This method should aim at guiding the developer to clarify the purpose...... of the simulation, to select appropriate component models and to set up the equations in a well-arranged way. In this paper the outline of such a method is proposed and examples showing the use of this method for simulation of refrigeration systems are given....

  17. Heating, ventilation and air conditioning system modelling

    Energy Technology Data Exchange (ETDEWEB)

    Whalley, R.; Abdul-Ameer, A. [British University in Dubai (United Arab Emirates)

    2011-03-15

    Heating, ventilation and air conditioning modelling methods, for large scale, spatially dispersed systems are considered. Existing techniques are discussed and proposals for the application of novel analysis approaches are outlined. The use of distributed-lumped parameter procedures enabling the incorporation of the relatively concentrated and significantly dispersed, system element characteristics, is advocated. A dynamic model for a heating, ventilation and air conditioning system comprising inlet and exhaust fans, with air recirculation, heating/cooling and filtration units is presented. Pressure, airflow and temperature predictions within the system are computed following input, disturbance changes and purging operations. The generalised modelling advancements adopted and the applicability of the model for heating, ventilation and air conditioning system simulation, re-configuration and diagnostics is emphasised. The employment of the model for automatic, multivariable controller design purposes is commented upon. (author)

  18. Model Driven Development of Data Sensitive Systems

    DEFF Research Database (Denmark)

    Olsen, Petur

    2014-01-01

    Model-driven development strives to use formal artifacts during the development process. Formal artifacts enables automatic analyses of some aspects of the system under development. This serves to increase the understanding of the (intended) behavior of the system as well as increasing error...... detection and pushing error detection to earlier stages of development. The complexity of modeling and the size of systems which can be analyzed is severely limited when introducing data variables. The state space grows exponentially in the number of variable and the domain size of the variables...... to the values of variables. This theses strives to improve model-driven development of such data-sensitive systems. This is done by addressing three research questions. In the first we combine state-based modeling and abstract interpretation, in order to ease modeling of data-sensitive systems, while allowing...

  19. Modeling and analysis of stochastic systems

    CERN Document Server

    Kulkarni, Vidyadhar G

    2011-01-01

    Based on the author's more than 25 years of teaching experience, Modeling and Analysis of Stochastic Systems, Second Edition covers the most important classes of stochastic processes used in the modeling of diverse systems, from supply chains and inventory systems to genetics and biological systems. For each class of stochastic process, the text includes its definition, characterization, applications, transient and limiting behavior, first passage times, and cost/reward models. Along with reorganizing the material, this edition revises and adds new exercises and examples. New to the second edi

  20. System Convergence in Transport Modelling

    DEFF Research Database (Denmark)

    Rich, Jeppe; Nielsen, Otto Anker; Cantarella, Guilio E.

    2010-01-01

    -of-successive-averages (MSA) have been proposed. Convergence of the MSA under fairly weak regularity conditions was shown in Robbins and Monro (1951). The iteration between demand and assignment ? the external equilibrium ? are in many models either decoupled or follow a very simple iteration pattern. However, as demand...

  1. Models of the venous system

    DEFF Research Database (Denmark)

    Mehlsen, J

    2000-01-01

    . The venous capacitance is also non-linear, but may be considered linear under certain conditions. The models have to include time varying pressure sources created by respiration and skeletal muscles, and if the description includes the upright position, the partly unidirectional flow through the venous...

  2. Systems Engineering Model for ART Energy Conversion

    Energy Technology Data Exchange (ETDEWEB)

    Mendez Cruz, Carmen Margarita [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Rochau, Gary E. [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Wilson, Mollye C. [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

    2017-02-01

    The near-term objective of the EC team is to establish an operating, commercially scalable Recompression Closed Brayton Cycle (RCBC) to be constructed for the NE - STEP demonstration system (demo) with the lowest risk possible. A systems engineering approach is recommended to ensure adequate requirements gathering, documentation, and mode ling that supports technology development relevant to advanced reactors while supporting crosscut interests in potential applications. A holistic systems engineering model was designed for the ART Energy Conversion program by leveraging Concurrent Engineering, Balance Model, Simplified V Model, and Project Management principles. The resulting model supports the identification and validation of lifecycle Brayton systems requirements, and allows designers to detail system-specific components relevant to the current stage in the lifecycle, while maintaining a holistic view of all system elements.

  3. Follow-On Shaft Seal Evaluation for Future OMS Engine Series Valve Derivations Project

    Data.gov (United States)

    National Aeronautics and Space Administration — Evidence of nitrogen tetroxide (NTO) and monomethylhydrazine (MMH) propellant vapor leakage across the primary and secondary shafts seals of the four OMS-E series...

  4. ”Hvorledes tales der om rehabilitering inden for børneområdet?”

    DEFF Research Database (Denmark)

    Møller, Mette Lund

    2004-01-01

    for børneområdet. Undersøgelsen baseres på tekster om WHO’s ”International klassifikation af funktions-evne, funktionsevnenedsættelse og helbredstilstand” (ICF) og tekster om Pædagogisk Psykologisk Rådgivning (PPR). Afhandlingen omhandler besvarelse af følgende problemformulering: Med baggrund i Foucaults...... analytiske begreber om diskurs og magt analyseres diskursive aspekter inden for børnerehabilitering med udgangspunkt i tekster om PPR og ICF. Der fremtrækkes udsagn, som kan karakterisere/illustrere en diskursiv formation inden for børnerehabilitering. Dernæst fremsættes forklaringer på, hvorledes den...

  5. Argyrophilic nucleolar organizer regions (AgNORs) in odontogenic myxoma (OM) and ameloblastic fibroma (AF).

    Science.gov (United States)

    Martins, C; Carvalho, Y R; do Carmo, M A

    2001-09-01

    Ten cases of odontogenic myxoma (OM) and six cases of ameloblastic fibroma (AF) were subjected to comparative analysis by the AgNOR technique, in order to determine a possible difference in cell proliferation index between these lesions. The mean AgNOR number of the mesenchymal component of AF was compared with its epithelial component and the difference was not found to be statistically significant. The mean AgNOR index of the AF group was significantly higher than that of the OM group. Moreover, the mesenchymal component of AF demonstrated increased AgNOR numbers compared with that of OM (P<0.05). These results suggest that the epithelial and mesenchymal components of AF may have similar cell proliferative activity. However, the cell proliferative index of this lesion seems to be higher than that of OM.

  6. The effect of Ce ion substituted OMS-2 nanostructure in catalytic activity for benzene oxidation

    Science.gov (United States)

    Hou, Jingtao; Li, Yuanzhi; Mao, Mingyang; Zhao, Xiujian; Yue, Yuanzheng

    2014-11-01

    The nanostructure of Ce doped OMS-2 plays a very important role in its catalytic property. We demonstrate by density functional theory (DFT) calculations that the unique nanostructure of the Ce ion substituted OMS-2 with Mn vacancy in the framework is beneficial for the improvement of catalytic activity, while the nanostructure of the Ce ion substituted OMS-2 without defects are detrimental to the catalytic activity. We establish a novel and facile strategy of synthesizing these unique Ce ion substituted OMS-2 nanostructure with Mn vacancies in the framework by hydrothermal redox reaction between Ce(NO3)3 and KMnO4 with KMnO4/Ce(NO3)3 at a molar ratio of 3 : 1 at 120 °C. Compared to pure OMS-2, the produced catalyst of Ce ion substituted OMS-2 ultrathin nanorods exhibits an enormous enhancement in the catalytic activity for benzene oxidation, which is evidenced by a significant decrease (ΔT50 = 100 °C, ΔT90 = 129 °C) in the reaction temperature of T50 and T90 (corresponding to the benzene conversion = 50% and 90%), which is considerably more efficient than the expensive supported noble metal catalyst (Pt/Al2O3). We combine both theoretical and experimental evidence to provide a new physical insight into the significant effect due to the defects induced by the Ce ion substitution on the catalytic activity of OMS-2. The formation of unique Ce ion substituted OMS-2 nanostructure with Mn vacancies in the framework leads to a significant enhancement of the lattice oxygen activity, thus tremendously increasing the catalytic activity.The nanostructure of Ce doped OMS-2 plays a very important role in its catalytic property. We demonstrate by density functional theory (DFT) calculations that the unique nanostructure of the Ce ion substituted OMS-2 with Mn vacancy in the framework is beneficial for the improvement of catalytic activity, while the nanostructure of the Ce ion substituted OMS-2 without defects are detrimental to the catalytic activity. We establish a novel

  7. Setting up an Asbestos Operations and Maintenance (O&M) Program

    Science.gov (United States)

    Covers steps a buidling's O&M plan should including: appointing an asbestos program manager, inspecting the building, developing a plan, and if necessary selecting and implementing larger repair or abatement projects.

  8. Elements of an Asbestos Operations and Maintenance (O&M) Program

    Science.gov (United States)

    Links to descriptions of Elements of an Operations and Maintenance (O&M) Program: Training, Occupant Notification, Monitoring ACM, Job-Site Controls for Work Involving ACM, Safe Work Practices, Recordkeeping, Worker Protection.

  9. Building multivariate systems biology models

    NARCIS (Netherlands)

    Kirwan, G.M.; Johansson, E.; Kleemann, R.; Verheij, E.R.; Wheelock, A.M.; Goto, S.; Trygg, J.; Wheelock, C.E.

    2012-01-01

    Systems biology methods using large-scale "omics" data sets face unique challenges: integrating and analyzing near limitless data space, while recognizing and removing systematic variation or noise. Herein we propose a complementary multivariate analysis workflow to both integrate "omics" data from

  10. Models of complex attitude systems

    DEFF Research Database (Denmark)

    Sørensen, Bjarne Taulo

    production, food and the environment, technological progress, animal welfare, local employment and the local economy. In addition, the survey included a conjoint task by which participants’ evaluations of the importance of production system attributes were measured. The data were analysed by means of causal...

  11. Adsorption Rate Models for Multicomponent Adsorption Systems

    Institute of Scientific and Technical Information of China (English)

    姚春才

    2004-01-01

    Three adsorption rate models are derived for multicomponent adsorption systems under either pore diffusion or surface diffusion control. The linear driving force (LDF) model is obtained by assuming a parabolic intraparticle concentration profile. Models I and Ⅱ are obtained from the parabolic concentration layer approximation. Examples are presented to demonstrate the usage and accuracy of these models. It is shown that Model I is suitable for batch adsorption calculations and Model Ⅱ provides a good approximation in fixed-bed adsorption processes while the LDF model should not be used in batch adsorption and may be considered acceptable in fixed-bed adsorption where the parameter Ti is relatively large.

  12. Modeling approach suitable for energy system

    Energy Technology Data Exchange (ETDEWEB)

    Goetschel, D. V.

    1979-01-01

    Recently increased attention has been placed on optimization problems related to the determination and analysis of operating strategies for energy systems. Presented in this paper is a nonlinear model that can be used in the formulation of certain energy-conversion systems-modeling problems. The model lends itself nicely to solution approaches based on nonlinear-programming algorithms and, in particular, to those methods falling into the class of variable metric algorithms for nonlinearly constrained optimization.

  13. Development and application of earth system models

    OpenAIRE

    Prinn, Ronald G.

    2012-01-01

    The global environment is a complex and dynamic system. Earth system modeling is needed to help understand changes in interacting subsystems, elucidate the influence of human activities, and explore possible future changes. Integrated assessment of environment and human development is arguably the most difficult and most important “systems” problem faced. To illustrate this approach, we present results from the integrated global system model (IGSM), which consists of coupled submodels address...

  14. Statistical Model Checking for Stochastic Hybrid Systems

    DEFF Research Database (Denmark)

    David, Alexandre; Du, Dehui; Larsen, Kim Guldstrand

    2012-01-01

    This paper presents novel extensions and applications of the UPPAAL-SMC model checker. The extensions allow for statistical model checking of stochastic hybrid systems. We show how our race-based stochastic semantics extends to networks of hybrid systems, and indicate the integration technique...... applied for implementing this semantics in the UPPAAL-SMC simulation engine. We report on two applications of the resulting tool-set coming from systems biology and energy aware buildings....

  15. A model for international border management systems.

    Energy Technology Data Exchange (ETDEWEB)

    Duggan, Ruth Ann

    2008-09-01

    To effectively manage the security or control of its borders, a country must understand its border management activities as a system. Using its systems engineering and security foundations as a Department of Energy National Security Laboratory, Sandia National Laboratories has developed such an approach to modeling and analyzing border management systems. This paper describes the basic model and its elements developed under Laboratory Directed Research and Development project 08-684.

  16. A Conceptual Data Model of Datum Systems

    Science.gov (United States)

    McCaleb, Michael R.

    1999-01-01

    A new conceptual data model that addresses the geometric dimensioning and tolerancing concepts of datum systems, datums, datum features, datum targets, and the relationships among these concepts, is presented. Additionally, a portion of a related data model, Part 47 of STEP (ISO 10303-47), is reviewed and a comparison is made between it and the new conceptual data model.

  17. Modelling of Generic Slung Load System

    DEFF Research Database (Denmark)

    Bisgaard, Morten; Bendtsen, Jan Dimon; La Cour-Harbo, Anders

    2006-01-01

    This paper presents the result of modelling and verification of a generic slung load system using a small-scale helicopter. The model is intended for use in simulation, pilot training, estimation, and control. The model is derived using a redundant coordinate formulation based on Gauss Principle ...

  18. Human performance modeling for system of systems analytics.

    Energy Technology Data Exchange (ETDEWEB)

    Dixon, Kevin R.; Lawton, Craig R.; Basilico, Justin Derrick; Longsine, Dennis E. (INTERA, Inc., Austin, TX); Forsythe, James Chris; Gauthier, John Henry; Le, Hai D.

    2008-10-01

    A Laboratory-Directed Research and Development project was initiated in 2005 to investigate Human Performance Modeling in a System of Systems analytic environment. SAND2006-6569 and SAND2006-7911 document interim results from this effort; this report documents the final results. The problem is difficult because of the number of humans involved in a System of Systems environment and the generally poorly defined nature of the tasks that each human must perform. A two-pronged strategy was followed: one prong was to develop human models using a probability-based method similar to that first developed for relatively well-understood probability based performance modeling; another prong was to investigate more state-of-art human cognition models. The probability-based modeling resulted in a comprehensive addition of human-modeling capability to the existing SoSAT computer program. The cognitive modeling resulted in an increased understanding of what is necessary to incorporate cognition-based models to a System of Systems analytic environment.

  19. Complex system modelling for veterinary epidemiology.

    Science.gov (United States)

    Lanzas, Cristina; Chen, Shi

    2015-02-01

    The use of mathematical models has a long tradition in infectious disease epidemiology. The nonlinear dynamics and complexity of pathogen transmission pose challenges in understanding its key determinants, in identifying critical points, and designing effective mitigation strategies. Mathematical modelling provides tools to explicitly represent the variability, interconnectedness, and complexity of systems, and has contributed to numerous insights and theoretical advances in disease transmission, as well as to changes in public policy, health practice, and management. In recent years, our modelling toolbox has considerably expanded due to the advancements in computing power and the need to model novel data generated by technologies such as proximity loggers and global positioning systems. In this review, we discuss the principles, advantages, and challenges associated with the most recent modelling approaches used in systems science, the interdisciplinary study of complex systems, including agent-based, network and compartmental modelling. Agent-based modelling is a powerful simulation technique that considers the individual behaviours of system components by defining a set of rules that govern how individuals ("agents") within given populations interact with one another and the environment. Agent-based models have become a recent popular choice in epidemiology to model hierarchical systems and address complex spatio-temporal dynamics because of their ability to integrate multiple scales and datasets.

  20. The effect of Ce ion substituted OMS-2 nanostructure in catalytic activity for benzene oxidation.

    Science.gov (United States)

    Hou, Jingtao; Li, Yuanzhi; Mao, Mingyang; Zhao, Xiujian; Yue, Yuanzheng

    2014-12-21

    The nanostructure of Ce doped OMS-2 plays a very important role in its catalytic property. We demonstrate by density functional theory (DFT) calculations that the unique nanostructure of the Ce ion substituted OMS-2 with Mn vacancy in the framework is beneficial for the improvement of catalytic activity, while the nanostructure of the Ce ion substituted OMS-2 without defects are detrimental to the catalytic activity. We establish a novel and facile strategy of synthesizing these unique Ce ion substituted OMS-2 nanostructure with Mn vacancies in the framework by hydrothermal redox reaction between Ce(NO3)3 and KMnO4 with KMnO4/Ce(NO3)3 at a molar ratio of 3 : 1 at 120 °C. Compared to pure OMS-2, the produced catalyst of Ce ion substituted OMS-2 ultrathin nanorods exhibits an enormous enhancement in the catalytic activity for benzene oxidation, which is evidenced by a significant decrease (ΔT(50) = 100 °C, ΔT(90) = 129 °C) in the reaction temperature of T50 and T90 (corresponding to the benzene conversion = 50% and 90%), which is considerably more efficient than the expensive supported noble metal catalyst (Pt/Al2O3). We combine both theoretical and experimental evidence to provide a new physical insight into the significant effect due to the defects induced by the Ce ion substitution on the catalytic activity of OMS-2. The formation of unique Ce ion substituted OMS-2 nanostructure with Mn vacancies in the framework leads to a significant enhancement of the lattice oxygen activity, thus tremendously increasing the catalytic activity.

  1. NFL Symposium om Ordforbindelser i monolingvale nordiske ordbøger

    DEFF Research Database (Denmark)

    Schoonderbeek Hansen, Inger

    2009-01-01

    Referat af NFL Symposium om Ordforbindelser i monolingvale nordiske ordbøger, afholdt på Schæffergården, København 16.-18. januar 2009. Udgivelsesdato: april 2009......Referat af NFL Symposium om Ordforbindelser i monolingvale nordiske ordbøger, afholdt på Schæffergården, København 16.-18. januar 2009. Udgivelsesdato: april 2009...

  2. Fortællingen om skizofreni som en hjernesygdom og behovet for et nyt paradigme

    DEFF Research Database (Denmark)

    Ringer, Agnes

    2014-01-01

    Ideen om at skizofreni er en hjernesygdom er udbredt både i psykiatrien, i media og i den brede offentlighed. Men hvad er egentlig belægget for denne ide? Og hvilke implikationer har den for psykiatrisk praksis? I artiklen ser jeg på idéen om skizofreni som en hjernesygdom som en Fortælling, og u...

  3. Projekt om sikre fødevareemballager af trykt papir og pap

    DEFF Research Database (Denmark)

    Petersen, Jens Højslev; Jensen, Lisbeth Krüger; Sørensen, Frank;

    2013-01-01

    Ny rapport og analysekoncept fra en tværfaglig projektgruppe hjælper trykkerier til at dokumentere om emballager af trykt pap til fødevarer lever op til lovgivningens og fødevareindustriens krav.......Ny rapport og analysekoncept fra en tværfaglig projektgruppe hjælper trykkerier til at dokumentere om emballager af trykt pap til fødevarer lever op til lovgivningens og fødevareindustriens krav....

  4. En pose blandet slik - fortællinger om livet som plejebarn

    DEFF Research Database (Denmark)

    Warming, H.

    Bogen handler om livet som plejebarn på godt og ondt - som børnene selv oplever og fortæller om det. En rød tråd i fortællingerne er, at uanset hvor ked af det eller glad, man er for at være i pleje, føler stort set alle plejebørn sig anderledes end deres kammerater, omend i større eller mindre...

  5. Ansvar for egen aldring – om bevægelsesfremme i senlivet

    DEFF Research Database (Denmark)

    Fristrup, Tine

    2013-01-01

    Kapitlet handler om, hvordan gerontopædagogiske erfaringer af grænsen mellem det selvfølgelige i at være i bevægelse og det mærkelige i at gå i stå, når man endnu ikke er død, muliggøres i tidens forskellige aldringsdiskurser særligt i diskursen om aktiv aldring. Fire socialpædagogiske problemati...

  6. Bill Gates køber sig til positive historier om udviklingsbistanden

    DEFF Research Database (Denmark)

    Fejerskov, Adam Moe

    2014-01-01

    Flere store og velansete medier får penge af Bill Gates' fond for at at bringe positive historier om udviklingsbistanden. Men det medfører en risiko for at journalistikken bliver ukritisk og overfladisk......Flere store og velansete medier får penge af Bill Gates' fond for at at bringe positive historier om udviklingsbistanden. Men det medfører en risiko for at journalistikken bliver ukritisk og overfladisk...

  7. Pierre Trudeau og den radikale vision om det identitetsløse folk

    DEFF Research Database (Denmark)

    Böss/Bøss, Michael

    2012-01-01

    En redegørelse for Pierre Trudeaus syn på det nationale og hans vision om canadierne som et folk, som ikke er baseret på kultur, men på borgerlige rettigheder.......En redegørelse for Pierre Trudeaus syn på det nationale og hans vision om canadierne som et folk, som ikke er baseret på kultur, men på borgerlige rettigheder....

  8. Synthesis of single crystal manganese oxide octahedral molecular sieve (OMS) nanostructures with tunable tunnels and shapes.

    Science.gov (United States)

    Li, Wei-Na; Yuan, Jikang; Gomez-Mower, Sinue; Sithambaram, Shantakumar; Suib, Steven L

    2006-02-23

    A new and facile route is reported to manipulate the self-assembly synthesis of hierarchically ordered Rb-OMS-2 and pyrolusite with an interesting flowerlike morphology by a direct and mild reaction between rubidium chromateand manganese sulfate without any organic templates. The crystal forms, morphologies, and tunnel sizes of the obtained OMS materials can be controlled. A mechanism for the growth of manganese dioxides with flowerlike architectures was proposed. The obtained products exhibit potential for use in catalysis and other applications.

  9. The Cost of Culture: Controlling DOD’s Runaway O&M Spending

    Science.gov (United States)

    2013-01-01

    operating at steady- state, in a war, or absorbing a postconflict drawdown. Potential solutions for each case are presented herein. Background O&M... postconflict drawdowns. Use It or Lose It: Steady- state o&M Growth Upon entering the main gate of nearly any operational Air Force base, one of the first...for which DOD plans are fully specified. Key: a. For 2002 to 2013, supplemental and emergency funding for overseas contingency operations, such as

  10. Using Interaction Scenarios to Model Information Systems

    DEFF Research Database (Denmark)

    Bækgaard, Lars; Bøgh Andersen, Peter

    The purpose of this paper is to define and discuss a set of interaction primitives that can be used to model the dynamics of socio-technical activity systems, including information systems, in a way that emphasizes structural aspects of the interaction that occurs in such systems. The primitives...

  11. Port-based modeling of mechatronic systems

    NARCIS (Netherlands)

    Breedveld, Peter C.

    2004-01-01

    Many engineering activities, including mechatronic design, require that a multidomain or ‘multi-physics’ system and its control system be designed as an integrated system. This contribution discusses the background and tools for a port-based approach to integrated modeling and simulation of physical

  12. Lattice models of ionic systems

    Science.gov (United States)

    Kobelev, Vladimir; Kolomeisky, Anatoly B.; Fisher, Michael E.

    2002-05-01

    A theoretical analysis of Coulomb systems on lattices in general dimensions is presented. The thermodynamics is developed using Debye-Hückel theory with ion-pairing and dipole-ion solvation, specific calculations being performed for three-dimensional lattices. As for continuum electrolytes, low-density results for simple cubic (sc), body-centered cubic (bcc), and face-centered cubic (fcc) lattices indicate the existence of gas-liquid phase separation. The predicted critical densities have values comparable to those of continuum ionic systems, while the critical temperatures are 60%-70% higher. However, when the possibility of sublattice ordering as well as Debye screening is taken into account systematically, order-disorder transitions and a tricritical point are found on sc and bcc lattices, and gas-liquid coexistence is suppressed. Our results agree with recent Monte Carlo simulations of lattice electrolytes.

  13. Quantitative Models and Analysis for Reactive Systems

    DEFF Research Database (Denmark)

    Thrane, Claus

    phones and websites. Acknowledging that now more than ever, systems come in contact with the physical world, we need to revise the way we construct models and verification algorithms, to take into account the behavior of systems in the presence of approximate, or quantitative information, provided...... by the environment in which they are embedded. This thesis studies the semantics and properties of a model-based framework for re- active systems, in which models and specifications are assumed to contain quantifiable information, such as references to time or energy. Our goal is to develop a theory of approximation......, by studying how small changes to our models affect the verification results. A key source of motivation for this work can be found in The Embedded Systems Design Challenge [HS06] posed by Thomas A. Henzinger and Joseph Sifakis. It contains a call for advances in the state-of-the-art of systems verification...

  14. Simulation Model of Brushless Excitation System

    Directory of Open Access Journals (Sweden)

    Ahmed N.A.  Alla

    2007-01-01

    Full Text Available Excitation system is key element in the dynamic performance of electric power systems, accurate excitation models are of great importance in simulating and investigating the power system transient phenomena. Parameter identification of the Brushless excitation system was presented. First a block diagram for the EXS parameter was proposed based on the documents and maps in the power station. To identify the parameters of this model, a test procedure to obtain step response, was presented. Using the Genetic Algorithm with the Matlab-software it was possible to identify all the necessary parameters of the model. Using the same measured input signals the response from the standard model showed nearly the same behavior as the excitation system.

  15. Contribution of effluent organic matter (EfOM) to ultrafiltration (UF) membrane fouling: Isolation, characterization, and fouling effect of EfOM fractions

    KAUST Repository

    Zheng, Xing

    2014-11-01

    EfOM has been regarded as a major organic foulant resulting in UF membrane fouling in wastewater reclamation. To investigate fouling potential of different EfOM fractions, the present study isolated EfOM into hydrophobic neutrals (HPO-N), colloids, hydrophobic acids (HPO-A), transphilic neutrals and acids (TPI), and hydrophilics (HPI), and tested their fouling effect in both salt solution and pure water during ultrafiltration (UF). Major functional groups and chemical structure of the isolates were identified using Fourier transform infrared spectroscopy (FT-IR) and solid-state carbon nuclear magnetic resonance (13C NMR) analysis. The influence of the isolation process on the properties of EfOM fractions was minor because the raw and reconstituted secondary effluents were found similar with respect to UV absorbance, molecular size distribution, and fluorescence character. In membrane filtration tests, unified membrane fouling index (UMFI) and hydraulic resistance were used to quantify irreversible fouling potential of different water samples. Results show that under similar DOC level in feed water, colloids present much more irreversible fouling than other fractions. The fouling effect of the isolates is related to their size, chemical properties, and solution chemistry. Further investigations have identified that the interaction between colloids and other fractions also influences the performance of colloids in fouling phenomena. © 2014 Elsevier Ltd.

  16. Bistand til risikovurdering Supplerende oplysninger fra Syngenta Seeds om overvågningsplanen (evt. ændret risikovurdering). Zea mays (Bt11). Supplerende materiale om Bt11

    DEFF Research Database (Denmark)

    Kjellsson, Gøsta; Strandberg, Morten Tune; Damgaard, Christian

    2005-01-01

    "Mail: Den supplerende information om Bt-11 majsen (C/F/96/05-10) der er modtaget d. 02-03-2005, indeholder en ny udgave af den generelle overvågningsplan med enkelte ændringer (forbedringer) i forhold til forrige udgave (kommenteret 24-02-2005). Vi har ikke fundet nogen nye oplysninger der ændre...

  17. Mechatronic Systems Design Methods, Models, Concepts

    CERN Document Server

    Janschek, Klaus

    2012-01-01

    In this textbook, fundamental methods for model-based design of mechatronic systems are presented in a systematic, comprehensive form. The method framework presented here comprises domain-neutral methods for modeling and performance analysis: multi-domain modeling (energy/port/signal-based), simulation (ODE/DAE/hybrid systems), robust control methods, stochastic dynamic analysis, and quantitative evaluation of designs using system budgets. The model framework is composed of analytical dynamic models for important physical and technical domains of realization of mechatronic functions, such as multibody dynamics, digital information processing and electromechanical transducers. Building on the modeling concept of a technology-independent generic mechatronic transducer, concrete formulations for electrostatic, piezoelectric, electromagnetic, and electrodynamic transducers are presented. More than 50 fully worked out design examples clearly illustrate these methods and concepts and enable independent study of th...

  18. Improvements in continuum modeling for biomolecular systems

    CERN Document Server

    Qiao, Yu

    2015-01-01

    Modeling of biomolecular systems plays an essential role in understanding biological processes, such as ionic flow across channels, protein modification or interaction, and cell signaling. The continuum model described by the Poisson-Boltzmann (PB)/Poisson-Nernst-Planck (PNP) equations has made great contributions towards simulation of these processes. However, the model has shortcomings in its commonly used form and cannot capture (or cannot accurately capture) some important physical properties of biological systems. Considerable efforts have been made to improve the continuum model to account for discrete particle interactions and to make progress in numerical methods to provide accurate and efficient simulation. This review will summarize recent main improvements in continuum modeling for biomolecular systems, with focus on the size-modified models, the coupling of the classical density functional theory and PNP equations, the coupling of polar and nonpolar interactions, and numerical progress.

  19. Structural system identification: Structural dynamics model validation

    Energy Technology Data Exchange (ETDEWEB)

    Red-Horse, J.R.

    1997-04-01

    Structural system identification is concerned with the development of systematic procedures and tools for developing predictive analytical models based on a physical structure`s dynamic response characteristics. It is a multidisciplinary process that involves the ability (1) to define high fidelity physics-based analysis models, (2) to acquire accurate test-derived information for physical specimens using diagnostic experiments, (3) to validate the numerical simulation model by reconciling differences that inevitably exist between the analysis model and the experimental data, and (4) to quantify uncertainties in the final system models and subsequent numerical simulations. The goal of this project was to develop structural system identification techniques and software suitable for both research and production applications in code and model validation.

  20. FSM Model of a Simple Photovoltaic System

    Directory of Open Access Journals (Sweden)

    Martina Latkova

    2015-01-01

    Full Text Available The paper describes a simulation model of a simple photovoltaic system intended as a tool for testing the use of finite state machines for simulations representing a long-term operation of renewable energy sources. The mathematical model of the photovoltaic system is described first. Then it is used to build a finite state machine model that calculates a power output of the photovoltaic system for changing values of a solar irradiance and a temperature. Data measured on a real photovoltaic installation are used to verify model’s accuracy through its comparison with a previously created and verified Matlab model. The finite state machine model presented in this paper was created using Ptolemy II software.