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Sample records for max turbine temp

  1. Oxidation of Alumina-Forming MAX Phases in Turbine Environments

    Science.gov (United States)

    Smialek, James; Garg, Anita; Harder, Bryan; Nesbitt, James; Gabb, Timothy; Gray, SImon

    2017-01-01

    Protective coatings for high temperature turbine components are based on YSZ thermal barriers and oxidation resistant, alumina-forming NiAl or NiCoCrAlY bond coats. Ti2AlC and Cr2AlC MAX phases are thus of special interest because of good oxidation resistance and CTE that can match Al2O3 and YSZ. Their alumina scales grow according to cubic kinetics due to grain growth in the scale, with initial heating dominated by fast TiO2 growth. Protective cubic kinetics are also found in high pressure burner rig tests of MAXthal 211 Ti2AlC, but with reduced rates due to volatile TiO(OH)2 formation in water vapor. YSZ-coatings on bulk Ti2AlC exhibit remarkable durability up to 1300C in furnace tests and at least a 25x life advantage compared to superalloys. At another extreme, Cr2AlC is resistant to low temperature Na2SO4 hot corrosion and exhibits thermal cycling stability bonded to a superalloy disk material. Accordingly, sputtered Cr2AlC coatings on disk specimens prevented hot corrosion detriments on LCF. Breakaway oxidation (Ti2AlC), scale spallation (Cr2AlC), interdiffusion, and processing as coatings still present serious challenges. However the basic properties of MAX phases provide some unusual opportunities for use in high temperature turbines.

  2. Oxidation of Al2O3 Scale-Forming MAX Phases in Turbine Environments

    Science.gov (United States)

    Smialek, James L.

    2018-03-01

    High temperature oxidation of alumina-forming MAX phases, Ti2AlC and Cr2AlC, were examined under turbine engine environments and coating configurations. Thermogravimetric furnace tests of Ti2AlC showed a rapid initial transient due to non-protective TiO2 growth. Subsequent well-behaved cubic kinetics for alumina scale growth were shown from 1273 K to 1673 K (1000 °C to 1400 °C). These possessed an activation energy of 335 kJ/mol, consistent with estimates of grain boundary diffusivity of oxygen ( 375 kJ/mol). The durability of Ti2AlC under combustion conditions was demonstrated by high pressure burner rig testing at 1373 K to 1573 K (1100 °C to 1300 °C). Here good stability and cubic kinetics also applied, but produced lower weight gains due to volatile TiO(OH)2 formation in water vapor combustion gas. Excellent thermal stability was also shown for yttria-stabilized zirconia thermal barrier coatings deposited on Ti2AlC substrates in 2500-hour furnace tests at 1373 K to 1573 K (1100 °C to 1300 °C). These sustained a record 35 µm of scale as compared to 7 μm observed at failure for typical superalloy systems. In contrast, scale and TBC spallation became prevalent on Cr2AlC substrates above 1423 K (1150 °C). Cr2AlC diffusion couples with superalloys exhibited good long-term mechanical/oxidative stability at 1073 K (800 °C), as would be needed for corrosion-resistant coatings. However, diffusion zones containing a NiAl-Cr7C3 matrix with MC and M3B2 particulates were commonly formed and became extensive at 1423 K (1150 °C).

  3. Usaha Pemasaran Produsen Tempe

    Directory of Open Access Journals (Sweden)

    R. Nana Kusdiana

    2013-05-01

    Full Text Available Tempe is a food made from the fermentation of soybeans or some other materials using somekind of fungus Rhizopus, such as Rhizopus oligosporus, Rh. oryzae, Rh. stolonifer or also known as bread mold, or Rh. arrhizus. Fermentation preparations are commonly known as "yeast tempe". Tempe has been known since ancient times, particularly in Java as supplement staple food which is high protein and low cholesterol. Tempe and tofu selling price is still low compared to other protein food sources, such as fish and chicken. According to market research, the majority of tempe and tofu products is still the lower class’ consumption, since the quality and processing methods are traditional distribution, including in sanitation and hygiene. It is necessary to stimulate and generate interest in the bank to develop relationship with the Indonesian Tofu Tempe Producers Cooperative (KOPTI and its members to tempe producers can increase production and performance. Tempe and Tofu Development Centers Manufacturers through Integrated Partnership Program by KOPTI as a company with a core group of tempe and tofu manufacturers, which are members of the KOPTI, is the modernization of tempe and tofu small business activity to be an independent food business industry.

  4. La disparition du temps en gravitation quantique

    OpenAIRE

    Saint-Ours, Alexis de

    2012-01-01

    Le but de ce travail est d’examiner l’incidence philosophique de la gravitation quantique sur le concept de temps. Je cherche à montrer qu’elle conduit à une disparition du temps comme dimension et ouvre la voie à une compréhension du temps comme variation et même à l’idée de variation pure. En l’absence de temps mécanique, il est cependant possible de définir un temps d’origine thermodynamique. Je montre en quoi cette dissociation du temps mécanique et du temps thermodynamique, fait écho à l...

  5. Max Planck et les quanta

    CERN Document Server

    Boudenot, Jean-Claude

    2016-01-01

    « Les atomes, dit Jean Perrin en 1913, ne sont pas ces éléments éternels et insécables dont l'irréductible simplicité donnait au possible une borne, et, dans leur inimaginable petitesse, nous commençons à pressentir un fourmillement prodigieux de mondes nouveaux ». C'est bien dans un monde totalement nouveau, le monde quantique, que nous a fait pénétrer la découverte des quanta par Max Planck. Son article de 1900 est le déclencheur de l'une des plus grandes révolutions scientifiques de tous les temps. Les trente années qui suivent sont les plus riches de la physique ; Planck, Einstein, Bohr, Sommerfeld, de Broglie, Schrödinger, Heisenberg, Dirac, Born, Pauli… reconstruisent la physique sur de nouvelles bases sur fond de conflit des générations. Le monde est par ailleurs secoué par la guerre, Max Planck est tourmenté et vit des épreuves personnelles dramatiques. C'est l'homme, aussi bien que l'oeuvre, que les auteurs ont tenté de dépeindre dans cet ouvrage. Ils ont également souhait�...

  6. NOAA Global Surface Temperature (NOAAGlobalTemp)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — The NOAA Global Surface Temperature Dataset (NOAAGlobalTemp) is a merged land–ocean surface temperature analysis (formerly known as MLOST) (link is external). It is...

  7. Peut-on voyager dans le temps ?

    CERN Multimedia

    CERN. Geneva

    2008-01-01

    La possibilité de voyager dans le temps est régulièrement évoquée par les magazines scientifiques (et parfois même par les scientifiques). Elle est également le sujet de nombreux romans de science-fiction. Nous discuterons d’abord du sens qu’on peut donner à l’expression « voyager dans le temps », puis nous expliciterons ce que la physique contemporaine dit à ce propos.

  8. KADAR ZAT GIZI DALAM TEMPE BENGUK

    Directory of Open Access Journals (Sweden)

    Indrawati Gandjar

    2012-11-01

    Full Text Available Disamping kacang kedele dan kacang tanah sejumlah kacang-kacangan yang kurang dikenal juga dimakan penduduk daerah-daerah tertentu di Pulau Jawa. Diantaranya biji-biji koro benguk (Mucuna pruriens. Hasil fermentasi dari biji-biji ini dikenal sebagai tempe benguk.Dalam penelitian ini telah digunakan campuran biji koro benguk varitas abu-abu dan varitas hitam dalam perbandingan 1:1.Hasil isolasi mikroflora dari contoh-contoh tempe benguk yang dijual belikan ialah species dari marga (genus Rhizopus. Strain 90 II/3 dari desa Donomulyo Malang Selatan yang diidentifikasi sebagai R. arrhizus menghasilkan tempe benguk yang baik dan dipakai dalam penelitian ini.Telah dilakukan analisa zat gizi kedua varitas biji-biji koro benguk mentah, begitu pula dari substrat sebelum fermentasi dan tempe benguknya. Kadar protein dari tempe benguk dengan strain 90 II/3 ialah 14.1%.Proses perebusan, perendaman dan pengukusan telah menghilangkan seluruh HCN dalam substrat. Dari segi kandungan aflatoksin tempe benguk dalam penelitian ini tidak membahayakan karena kandungannya hanya 1.04 ppb.Hasil fermentasi biji-biji koro benguk dapat merupakan suatu sumber protein murah bagi penduduk yang makanan pokoknya terutama serealia dan umbi-umbian.

  9. Remembering Max Boisot

    DEFF Research Database (Denmark)

    Sanchez, Ron

    2013-01-01

    This chapter offers some reflections on Max Boisot and his extraordinary intellect drawn from our 15 years of exchanging and crafting ideas together. I first comment on the process of working with Max, and then suggest some of the remarkable qualities of thought that I believe distinguished Max's...... these qualities of thought are also reflected in Max's individual work and especially in his crowning achievement, the Information-Space Model....

  10. PEMBERDAYAAN PERAJIN TEMPE DALAM MENGEMBANGKAN SENTRA INDUSTRI KECIL TEMPE DI KOTA SEMARANG

    Directory of Open Access Journals (Sweden)

    R Rusdarti

    2015-12-01

    Full Text Available The presence of small craft industries tempe, is one of the economic pillars of the people who can provide added value economy in the city, as well as providing a significant contribution in expanding employment opportunities, as well as a force capable of improving the welfare of the people. The purpose of this study to describe the phenomenon of small industrial/tempe producers, potential and constraints of the economic empowerment of communities that can be applied and developed in a small industrial tempe, and formulate policies in accordance with the potential srategi small craft industries tempe in the city of Semarang. The results showed that: 1 The tendency of the phenomenon of changes in tempe crafter business patterns are relatively small and micro enterprises as well as conditions of low-quality human resources, which lead them to be low income, (2 Empowerment has changed the concept of economic and social development that has the potential of productive micro-economic basis. Factors expertise/ skill used in the production process significantly contributed 67.8 percent of industrial production on a small tempe. It shows the contribution of the most dominant in the small industrial tempe, that expertise is important in a small industrial tempe, (3 development strategy capable of mobilizing the various aspects of resources and the capacity and potential of the community, making empowerment can be implemented into the best tools in an effort to income artisans tempe city of Semarang. Recom­mended considering internal factors crafters tempe still weak and fundamentally, the crafters need to get guidance and the way in which one of them by learning from the experience and the concerns of various stakeholders.Keberadaan industri kecil perajin tempe, merupakan salah satu pilar ekonomi rakyat yang mampu memberikan nilai tambah ekonomi di Kota Semarang, serta memberikan sumbangan yang signifikan dalam memperluas lapangan kerja, sekaligus

  11. Manquons-nous de temps ?

    Directory of Open Access Journals (Sweden)

    Dominique Méda

    2003-06-01

    Full Text Available Les individus des sociétés développées occidentales manquent-ils objectivement et subjectivement de plus en plus de temps? (Schor, 1991; Méda et Schor, 1997 Si ces propos ont suscité, à l’époque, le débat aux États-Unis (les statistiques mobilisées par Juliet Schor avaient notamment été mises en cause par Robinson et Godbey, 1999, spécialistes des enquêtes emploi du temps aux Etats-Unis, il n’en a pas été de même en France, le poids du chômage reléguant légitimement ce genre de préoccupation aux derniers rangs. Depuis quelques années pourtant, sous l’effet de la reprise de l’emploi intervenue entre 1997 et 2000, de l’augmentation du temps de travail de certaines catégories et de la diffusion de la RTT, les enquêtes commencent à s’intéresser à ces questions et à dessiner les contours d’une population pour laquelle le manque de temps constitue un véritable problème. Loin de n’être qu’un petit inconfort personnel, qui serait l’apanage des cadres dirigeants et des wonderwomen, le sentiment de manque de temps apparaît au contraire comme le signe d’un grippage ou d’une inefficacité des mécanismes classiques de régulation, et sans doute comme une invitation à concevoir des politiques publiques capables d’aider à la mise en place d’une nouvelle concordance et d’une plus grande cohérence des différents temps individuels et sociaux.

  12. Indonesian consumers' perception of tempe in a restaurant setting traditional and modern tempe version in traditional and innovative dishes

    DEFF Research Database (Denmark)

    Fibri, Dwi Larasatie Nur; Frøst, Michael Bom

    by introducing local bean tempe in fine dining. The objective of this research was to study how different raw materials, dishes and gastronomic style affect the perception and appreciation of the food. A restaurant experiment (n=208) was carried out. Three different types of tempe (local soybean tempe, imported...

  13. Mini MAX - Medicaid Sample

    Data.gov (United States)

    U.S. Department of Health & Human Services — To facilitate wider use of MAX, CMS contracted with Mathematica to convene a technical expert panel (TEP) and determine the feasibility of creating a sample file for...

  14. MAX and Survey Linkages

    Data.gov (United States)

    U.S. Department of Health & Human Services — CMS is interested in linking MAX files with survey data, including four surveys conducted by the National Center for Health Statistics (NCHS) - the National Health...

  15. MAX Provider Characteristics

    Data.gov (United States)

    U.S. Department of Health & Human Services — The MAX Provider Characteristics (PC) File Implementation Report describes the design, implementation, and results of the MAXPC prototype, which was based on three...

  16. AuroraMAX!

    Science.gov (United States)

    Donovan, E.; Spanswick, E. L.; Chicoine, R.; Pugsley, J.; Langlois, P.

    2011-12-01

    AuroraMAX is a public outreach and education initiative that brings auroral images to the public in real time. AuroraMAX utilizes an observing station located just outside Yellowknife, Canada. The station houses a digital All-Sky Imager (ASI) that collects full-colour images of the night sky every six seconds. These images are then transmitted via satellite internet to our web server, where they are made instantly available to the public. Over the last two years this program has rapidly become one of the most successful outreach programs in the history of Space Science in Canada, with hundreds of thousands of distinct visitors to the CSA AuroraMAX website, thousands of followers on social media, and hundreds of newspaper, magazine, radio, and television spots. Over the next few years, the project will expand to include a high-resolution SLR delivering real-time auroral images (also from Yellowknife), as well as a program where astronauts on the ISS will take pictures of the aurora with a handheld SLR. The objectives of AuroraMAX are public outreach and education. The ASI design, operation, and software were based on infrastructure that was developed for the highly successful ASI component of the NASA THEMIS mission as well as the Canadian Space Agency (CSA) Canadian GeoSpace Monitoring (CGSM) program. So from an education and public outreach perspective, AuroraMAX is a single camera operating in the Canadian north. On the other hand, AuroraMAX is one of nearly 40 All-Sky Imagers that are operating across North America. The AuroraMAX camera produces data that is seamlessly integrated with the CGSM ASI data, and made widely available to the Space Science community through open-access web and FTP sites. One of our objectives in the next few years is to incorporate some of the data from the THEMIS and CGSM imagers into the AuroraMAX system, to maximize viewing opportunities and generate more real-time data for public outreach. This is an exemplar of a program that

  17. L’écriture du temps dans Robinson Crusoe

    OpenAIRE

    Bulckaen, Denise

    2018-01-01

    “Le récit est une séquence deux fois temporelle... il y a le temps de la chose-racontée et le temps du récit (temps du signifié et temps du signifiant)”. Cette citation se trouve au début du chapitre que Genette consacre à “Ordre” dans Figures III. Elle s'applique à de nombreux romans, mais elle est particulièrement intéressante quand on considère le roman de forme autobiographique. Le décalage entre “le temps du signifié” et “le temps du signifiant” est plus ou moins grand selon les romans. ...

  18. SUBSTITUSI TEPUNG TEMPE JAGUNG PADA PEMBUATAN MIE BASAH [Substitution of Corn Tempe Flour on Wet Noodle

    Directory of Open Access Journals (Sweden)

    Sri Setyani

    2017-03-01

    Full Text Available The purpose of this research was to find the best formulation of corn tempe flour and wheat flour to produce chemically, physicochemically and organoleptically acceptable sweet noodle. The formulation consisted of 4 levels ratio of 100% corn tempe flour and wheat flour L1 (10:90, L2 (20:80, L3 (30:70, L4 (40:60 w/w with 6 replications. The experiment was arranged in Complete Randomized Block Design (CRBD. Data were analyzed by using analysis of variance, further were tested by using the Least Significant Difference (LSD test in 5% level of significance. The result showed that the best formula was L3 treatment (30% corn tempe flour  and 70% wheat flour. The characteristic  of this noodle were 23.31% moisture content, 1.55% ash, 8.50% fat,   9.11% protein, 57,2% carbohydrate, 9.85% cooking loss, and 13.50 %water absorption. The wet noodle score sensory of texture was 2,88 (rather chewy, taste’s and aroma score was 3.05 (typical corn, and the overall of acceptance was  2.93 (like.Keywords: chemical-physicochemical and organoleptic characteristics, corn tempe flour,  wet noodle,wheat.

  19. WiMax taking wireless to the max

    CERN Document Server

    Pareek, Deepak

    2006-01-01

    With market value expected to reach 5 billion by 2007 and the endorsement of some of the biggest names in telecommunications, World Interoperability for Microwave Access (WiMAX) is poised to change the broadband wireless landscape. But how much of WiMAX's touted potential is merely hype? Now that several pre-WiMAX networks have been deployed, what are the operators saying about QoS and ROI? How and when will device manufacturers integrate WiMAX into their products? What is the business case for using WiMAX rather than any number of other established wireless alternatives?WiMAX: Taking Wireless

  20. Gas turbine

    International Nuclear Information System (INIS)

    Yang, Ok Ryong

    2004-01-01

    This book introduces gas turbine cycle explaining general thing of gas turbine, full gas turbine cycle, Ericson cycle and Brayton cycle, practical gas turbine cycle without pressure loss, multiaxial type gas turbine cycle and special gas turbine cycle, application of basic theory on a study on suction-cooling gas turbine cycle with turbo-refrigerating machine using the bleed air, and general performance characteristics of the suction-cooling gas turbine cycle combined with absorption-type refrigerating machine.

  1. Max Jakobson : Kommunismisse tuleb suhtuda objektiivselt / Max Jakobson

    Index Scriptorium Estoniae

    Jakobson, Max, 1923-2013

    2002-01-01

    President Rüütel andis Soome tuntud diplomaadile ja Inimsusevastaste Kuritegude Uurimise Rahvusvahelise Komisjoni (IKURK) esimehele Max Jakobsonile Maarjamaa Risti I klassi teenetemärgi. Tseremooniajärgne intervjuu Max Jakobsoniga

  2. Compositions of (max, +) automata

    Czech Academy of Sciences Publication Activity Database

    Lahaye, S.; Komenda, Jan; Boimond, J.-L.

    2015-01-01

    Roč. 25, 1-2 (2015), s. 323-344 ISSN 0924-6703 R&D Projects: GA ČR(CZ) GAP103/11/0517 Institutional support: RVO:67985840 Keywords : (max,+) automata * synchronous product * asynchronous product Subject RIV: BA - General Mathematics Impact factor: 1.268, year: 2015 http://link.springer.com/article/10.1007/s10626-014-0186-6

  3. Reassessing the Wage Penalty for Temps in Germany

    DEFF Research Database (Denmark)

    Jahn, Elke

    As a consequence of the rapid growth of temporary agency employment in Germany, the debate on the poor working conditions of temps, specifically their remuneration, has intensified recently. The paper shows that the wage gap for German temp workers is rather large and varies between occupation...

  4. Couleur de temps, fragments d’histoires.

    Directory of Open Access Journals (Sweden)

    Daniel Russo

    2003-12-01

    Full Text Available Exposition « Couleur de temps, fragments d’histoires : XIIe-XXe siècles », Dijon, Musée Archéologique, 20 juin-2 novembre 2003Le travail est le résultat d’une collaboration entre l’Université, les Services de l’Inventaire, le Musée Archéologique et l’“Association Patrimoine Ambiance et Couleurs en Bourgogne”. Dix ans après l’exposition “D’ocre et d’Azur”, en 1992, et la parution du catalogue, il était opportun de revenir sur les découvertes et les redécouvertes de peintures murales en Bourgog...

  5. Solar energy system performance evaluation: Seasonal report for Elcam Tempe Arizona State University, Tempe, Arizona

    Science.gov (United States)

    1980-01-01

    The solar system, Elcam-Tempe, was designed by Elcam Incorporated, Santa Barbara, California, to supply commercial domestic hot water heating systems to the Agriculture Department residence at Arizona State University. The building is a single story residence located at the agriculture experiment farm of the Arizona State University. The energy system's four modes of operation are described. Electrical energy savings at the site was a net of 5.54 million Btu after the 0.17 million Btu of operating energy required to operate collector loop circulating pump were subtracted. The energy savings due to solar was less than the system's potential. On an average, twice as much hot water could have been used with significant solar energy contribution. The system corrosion and deposits caused by using dissimilar metals in the collector loop was the only problem noted with the Elcam-Tempe system.

  6. Max Algebraic Complementary Basic Matrices

    Czech Academy of Sciences Publication Activity Database

    Fiedler, Miroslav; Hall, F.J.

    2014-01-01

    Roč. 457, 15 September (2014), s. 287-292 ISSN 0024-3795 Institutional support: RVO:67985807 Keywords : CB-matrix * Max algebra * Max permanent * Max eigenvalues Subject RIV: BA - General Mathematics Impact factor: 0.939, year: 2014

  7. Le temps mesurable, réversible, insaisissable ?

    CERN Document Server

    Fink, Martin; Leduc , Michèle

    2016-01-01

    Depuis l'Antiquité, la nature du temps a fasciné nombre de grands penseurs. Cet ouvrage expose ce que la physique est capable de dire aujourd'hui sur le sujet. La mesure du temps, ou plus exactement celle d'une durée, se fait grâce à des horloges atomiques dont l'exactitude peut atteindre une seconde sur plusieurs milliards d'années. Nous décrivons la façon dont s'effectue le transfert du temps qui permet la synchronisation d'horloges en différents points de la Terre ou de l'espace au milliardième de seconde près, ou même mieux. Les relativités, restreinte et générale, ont bouleversé notre conception du temps et ont un impact considérable sur certains problèmes de la vie quotidienne comme l'utilisation du GPS. On abandonne l'idée d'un temps absolu, le temps devient multiple et insaisissable, et peut-être même une illusion. Enfin la flèche du temps, ou l'irréversibilité, implique que les phénomènes physiques se déroulent toujours dans un sens déterminé, en relation avec la croissan...

  8. Turbinate surgery

    Science.gov (United States)

    Turbinectomy; Turbinoplasty; Turbinate reduction; Nasal airway surgery; Nasal obstruction - turbinate surgery ... There are several types of turbinate surgery: Turbinectomy: All or ... This can be done in several different ways, but sometimes a ...

  9. maxAlike

    DEFF Research Database (Denmark)

    Menzel, Karl Peter; Stadler, Peter F.; Gorodkin, Jan

    2011-01-01

    MOTIVATION: The task of reconstructing a genomic sequence from a particular species is gaining more and more importance in the light of the rapid development of high-throughput sequencing technologies and their limitations. Applications include not only compensation for missing data in unsequenced...... genomic regions and the design of oligonucleotide primers for target genes in species with lacking sequence information but also the preparation of customized queries for homology searches. RESULTS: We introduce the maxAlike algorithm, which reconstructs a genomic sequence for a specific taxon based...... on sequence homologs in other species. The input is a multiple sequence alignment and a phylogenetic tree that also contains the target species. For this target species, the algorithm computes nucleotide probabilities at each sequence position. Consensus sequences are then reconstructed based on a certain...

  10. Reassessing the Wage Penalty for Temps in Germany

    DEFF Research Database (Denmark)

    Jahn, Elke

    As a consequence of the rapid growth of temporary agency employment in Germany, the debate on the poor working conditions of temps, specifically their remuneration, has intensified recently. Using administrative data, the paper shows that the wage gap for German temp workers is rather large...... and varies between occupation and region. But temps already suffer from a marked wage decline before entering the temporary help sector. Nevertheless, temporary agency employment does not leave a long lasting scar. Two years after leaving the sector, temps no longer suffer from a wage penalty. A recent...... change in the law set a high incentive for temporary help agencies to pay their workers according to a sectoral collective agreement. Surprisingly, the unionization of the sector could not bring the widening wage gap to a halt....

  11. Les polítiques de temps a Europa

    OpenAIRE

    Torns, Teresa; Borràs Català, Vicent; Moreno Colom, Sara; Recio, Carolina

    2008-01-01

    En l'article es fa un balanç de les actuacions que poden ser qualificades com a polítiques de temps a diversos països europeus en els darrers vint anys, per arribar a la conclusió que el temps és una eina clau per definir els límits de l’estat del benestar. D’una banda, l’anàlisi de l’ús social del temps reflecteix una distribució desigual entre homes i dones; de l’altra, la constatació de la importància del temps de treball remunerat en l’organització de la vida de les persones dificulta el ...

  12. Les relativités espace, temps, gravitation

    CERN Document Server

    Le Bellac, Michel

    2015-01-01

    En 1905, la relativité restreinte bouleverse nos conceptions de l'espace et du temps : il n'existe pas de temps universel, et une conséquence spectaculaire est le paradoxe des jumeaux vérifié quotidiennement par le système GPS. Dix années après la relativité restreinte, la relativité générale interprète la gravitation comme une propriété géométrique de l'espace-temps. Il n'existe plus d'espace absolu où l'on pourrait disposer étoiles et galaxies et l'espace-temps est déformé au voisinage d'objets astrophysiques compacts. Dans un environnement de gravité forte, le temps diffère radicalement du temps usuel et la lumière peut faire du surplace ou même se retrouver piégée. Ce livre expose les concepts fondamentaux introduits par Einstein et il les confronte aux expériences les plus récentes en physique des particules élémentaires et en astrophysique. Le lecteur découvrira comment la relativité décrit ces objets étranges et fascinants que sont les étoiles à neutrons, les trous n...

  13. QUALITY AND SENSORY EVALUATIONS OF TEMPE PREPARED FROM VARIOUS PARTICLE SIZES OF LUPIN BEANS [Evaluasi Sensorik dan Kualitas Tempe dari Kacang Lupin Berbagai Ukuran Partikel

    Directory of Open Access Journals (Sweden)

    Sri Priatni*

    2013-12-01

    Full Text Available Tempe is an Indonesian fermented soy bean, produced by using mainly Rhizopus oligosporus. Diversification of tempe raw materials is required for better food security, e.g., using lupin. The potency of lupin bean has been studied as a substitute of soy in tempe production. Nutritionally, lupin bean offers additional advantages over soy bean, i.e., it has a lower level of many anti-nutritional factors (ANFs but contains higher protein (32-36% than most pulses. The objectives of this study were to select the most suitable lupin bean from different particle sizes for tempe production and to characterize the quality of lupin tempe. In this study, the lupin tempe samples were analyzed for moisture content, firmness, aroma, and the total count of colony after 1 and 2 days of fermentation. Sensory evaluation was conducted by 17 Indonesian untrained panelists (hedonic in three different days. The data were evaluated statistically using General Linear Model (GLM and Tukey’s Honest Significant Difference (HSD. Results showed that the moisture content of lupin tempe ranged from 60 to 66%, higher than that of soy tempe (58.90%. Meanwhile, the firmness of lupin tempe was between 21.38-30.89 N. Mostly, tempes which were produced from ≤50% of particles sized ≥5 mm (L3, L5 and L6 exhibited poor quality in terms of firmness and aroma. The mean of total count of colony in lupin tempe were 3.0x104 CFU/g, lower than that of soy tempe (218x103 CFU/g, indicating a slower growth of mycelia on lupin beans. However, the overall acceptability of lupin tempe which was prepared from whole beans (L4 and L7 was not significantly different from that of soy tempe. Based on these quality and sensory tests, lupin tempe using whole lupin beans was recommended for substitute of soy bean in tempe production.

  14. 3ds Max 2012 Bible

    CERN Document Server

    Murdock, Kelly L

    2011-01-01

    Updated version of the bestselling 3ds Max book on the market 3ds Max 2012 Bible is one of the most popular 3ds Max how-tos on the market. If you're a beginner just itching to create something right away, the Quick Start project in Part 1 is for you. If you're an experienced user checking out 3ds Max 2012's latest and greatest features, you'll love the fact that the 3ds Max 2012 Bible continues to be the most comprehensive reference on this highly complex application.Find out what's new, what's tried and true, and how creative you can get using the tips, tricks, and techniques in this must-hav

  15. Max Scheler's Phenomenology of Interrelation

    African Journals Online (AJOL)

    denise

    German phenomenologist and sociologist Max Scheler accorded sympathy a central role in his philosophy .... process of deliberation or ask myself how the other person might be feeling .... Scheler believes that Nietzsche mistakenly identifies.

  16. President Ilves kohtus Max Jakobsoniga

    Index Scriptorium Estoniae

    2008-01-01

    President Toomas Hendrik Ilves ja Soome tuntud diplomaat Max Jakobson arutasid 16. septembril 2008 Tallinnas toimunud kohtumisel julgeolekuolukorda Euroopas pärast Venemaa-Gruusia sõda, Euroopa Liidu suhteid Venemaaga ja NATO tulevikku

  17. Time-amplitude converter; Convertisseur temps-amplitude

    Energy Technology Data Exchange (ETDEWEB)

    Banner, M [Commissariat a l' Energie Atomique, Saclay (France).Centre d' Etudes Nucleaires

    1961-07-01

    It is normal in high energy physics to measure the time of flight of a particle in order to determine its mass. This can be done by the method which consists in transforming the time measurement into an analysis of amplitude, which is easier; a time-amplitude converter has therefore been built for this purpose. The apparatus here described uses a double grid control tube 6 BN 6 whose resolution time, as measured with a pulse generator, is 5 x 10{sup -11} s. The analysis of the response of a particle counter, made up of a scintillator and a photomultiplier, indicates that a time of resolution of 5 x 10{sup -10} s. can be obtained. A time of this order of magnitude is obtained experimentally with the converter. This converter has been used in the study of the time of flight of particles in a secondary beam of the accelerator Saturne. It has thus been possible to measure the energy spectrum of {pi}-mesons, of protons, and of deutons emitted from a polyethylene target bombarded by 1,4 and 2 GeV protons. (author) [French] Pour determiner la masse d'une particule, il est courant, en physique des hautes energies, de mesurer le temps de vol de cette particule. Cela peut etre fait par la methode qui consiste a transformer la mesure d'un temps en une analyse d'amplitude, plus aisee; aussi a-t-on, a cet effet, cree un convertisseur temps-amplitude. L'appareillage decrit dans cet article utilise un tube a double grille de commande 6 BN 6 dont le temps de resolution mesure avec un generateur d'impulsion est de 5.10{sup -11} s. L'analyse de la reponse d'un compteur de particules, constitue par un scintillateur et un photomultiplicateur, indique qu'un temps de resolution de 5.10{sup -10} s peut etre obtenu. Un temps de cet ordre est atteint experimentalement avec le convertisseur. Ce convertisseur a servi a l'etude du temps de vol des particules dans un faisceau secondaire de l'accelerateur Saturne. On a mesure ainsi le spectre d'energie des mesons {pi}, des protons, des deutons

  18. Hydraulic turbines

    International Nuclear Information System (INIS)

    Meluk O, G.

    1998-01-01

    The hydraulic turbines are defined according to the specific speed, in impulse turbines and in reaction turbines. Currently, the Pelton turbines (of impulse) and the Francis and Kaplan turbines (of reaction), they are the most important machines in the hydroelectric generation. The hydraulic turbines are capable of generating in short times, large powers, from its loads zero until the total load and reject the load instantly without producing damages in the operation. When the hydraulic resources are important, the hydraulic turbines are converted in the axle of the electric system. Its combination with thermoelectric generation systems, it allow the continuing supply of the variations in demand of energy system. The available hydraulic resource in Colombia is of 93085 MW, of which solely 9% is exploited, become 79% of all the electrical country generation, 21% remaining is provided by means of the thermoelectric generation

  19. SIFAT HIPOKOLESTEREMIK MINYAK KELAPA SAWIT, MINYAK KEDELAI DAN TEMPE

    Directory of Open Access Journals (Sweden)

    Mien KMS Mahmud

    2012-11-01

    Full Text Available Kadar kolesterol dan trigliserida darah merupakan salah satu indikator yang dapat digunakan untuk mendiagnosa kemungkinan adanya gangguan jantung atherosklerosis. Kadar lipida darah mempunyai korelasi yang tinggi dengan jenis lemak atau minyak yang dikonsumsi setiap hari, karena komposisi asam lemak pada setiap jenis minyak berbeda. Tempe telah lama digemari masyarakat Indonesia dan telah diketahui bermanfaat bagi kesehatan. Penelitian yang dilaporkan melalui makalah ini bertujuan mempelajari peluang kejadian penyakit atherosklerosis pada pada kelinci dengan pola konsumsi minyak makan asal kelapa sawit, minyak kedelai, minyak asal lemak babi atau minyak babi dicampur tempe. Kelinci percobaan dewasa yang sehat dikelompokkan berdasarkan kadar hemoglobin darah antara 8.2-13.6 g/dl menjadi lima kelompok percobaan. Satu kelompok sebagai kontrol diberi ronsum standar terdiri dari pelet, kangkung dan ubi merah secara adlibitum. Empat kelompok lainnya, disamping ransum standar juga diberi 2 ml minyak babi atau minyak kedelai atau minyak kelapa sawit atau minyak babi yang ditambahkan 5 gram tempe bubuk, sehari. Pengamatan dilakukan terhadap kadar kolesterol total,  LDL, HDL dan trigliserido darah. Dilakukan pula pemeriksaan histopatologi pada jaringan pembuluh darah jantung. Hasil penelitian menunjukkan bahwa minyak babi menyebabkan kenaikan kadar kolesterol total, LDL, HDL dan trigliserida didalam darah sebanyak masing-masing berturut-tuut 60%, 89%, 52% dan 42%. Minyak kelapa sawit menaikan kadar kolesterol total 15%, menurunkan kadar LDL 21%, menaikan kadar HDL 24% dan menurunkan kadar trigliserida 14%. Minyak kedelai menurunkan kolesterol total sebanyak 10%, LDL 30%, trigliserida 24% seraya menaikan kadar HDL sebanyak 3%. Penambahan tempe ke dalam minyak babi dapat menurunkan kadar kolesterol total 10%, LDL 44%, trigliserida 28% dan memelihara kadar HDL lebih tinggi dari sebelum perlakuan. Hasil pemeriksaan histopatologi menunjukkan bahwa pemberian

  20. Max Planck and modern physics

    International Nuclear Information System (INIS)

    Hoffmann, Dieter

    2010-01-01

    Max Planck (1858-1947) is according to the words of Max von Laue the ''father of quantum physics''. This characteristic has until today continuance, although Planck stood for long time sceptically in front of his quantum hypothesis and so became a revolutionary in spite of his wishes. Eclipted by this pioneer role of the scholar for the foundation of the quantum theory are the numerous further works of the scholer, by which he has in many other fields provided eminent things. Starting with his fundamental contribution to thermodynamics, which make him to an excellent researcher of the field, until the works in the early history of relativity theory and the promotion of the young Einstein, which let him become also to a pioneer of the second central pillar of modern physics. The present collection attempts to show the whole spectrum of the physical works of Max Planck and his role in the formation of modern physics. [de

  1. Analysis list: Max [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Max Blood,Muscle,Pluripotent stem cell + mm9 http://dbarchive.biosciencedbc.jp/kyus...hu-u/mm9/target/Max.1.tsv http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/target/Max.5.tsv http://dbarchive.bioscience...dbc.jp/kyushu-u/mm9/target/Max.10.tsv http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/colo/Max.Blood....tsv,http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/colo/Max.Muscle.tsv,http://dbarchive.bioscience...dbc.jp/kyushu-u/mm9/colo/Max.Pluripotent_stem_cell.tsv http://dbarchive.biosciencedbc.jp/k

  2. KANDUNGAN ASAM LEMAK, ZINK, DAN COPPER PADA TEMPE, BAGAIMANA POTENSINYA UNTUK MENCEGAH PENYAKIT DEGENERATIF?

    Directory of Open Access Journals (Sweden)

    Diah M. Utari

    2014-09-01

    that have role in increasing SOD antioxidant enzyme activity. The role of the enzyme is as a first barrier to free radical. Tempe could be considered as functional food which have benefit for address of lipid profile and prevent free radical which may reduce degenerative disease risk. Although there are no dietary recommendation of tempe for individual, it may a great benefit to consume tempe about 2-3 slice/day (100-150 g. It is better to cook with boiling or steaming to get maximal benefit of tempe for health. Key words: traditional food, tempe, fermentation

  3. Max Weber and Robert Michels.

    Science.gov (United States)

    Scaff, Lawrence A.

    1981-01-01

    This paper investigates the unique intellectual partnership of Max Weber and Robert Michels, with particular emphasis on Weber's influence on Michel's inquiry into the sociology of parties and organization. Concludes with an evaluation of the import of Weber's critique of Michels' work. (DB)

  4. De Max-Planck medaille

    NARCIS (Netherlands)

    Heijmans, H.G.; van Woerkom, P.Th.L.M.; Ankersmit, W.; Hagman, R.; Heijmans, H.G.; Olsder, G.J.; van de Schootbrugge, G.

    2017-01-01

    De Max-Planck-Medaille is een onderscheiding die sinds 1929 jaarlijks wordt uitgereikt door de toentertijd grootste vereniging van natuurkundigen ter wereld: de Deutsche Physikalische Gesellschaft. Het is als het ware de Nobelprijs voor de theoretische natuurkunde, volgens de natuurkundigen zelf. In

  5. Max Weber - bedaget og aktuel

    DEFF Research Database (Denmark)

    Eistrup, Jens

    2010-01-01

    undervisningsartiklen introducerer en række af Max Webers centrale begreber om herredømme, bureaukrati, social handlen, rationalitet og profession. dernæst illustreres hvorledes Webers begreber kan tjene til at belyse spændingsfeltet mellem politik og profession i en socialfaglig kontekst....

  6. O pensamento de Max Weber

    Directory of Open Access Journals (Sweden)

    Maurício Tragtenberg

    1966-06-01

    Full Text Available Max Weber inicia sua carreira universitária em 1893, como professor extraordinário de Direito Mercantil e Romano, na Universidade de Berlim. Em 1894 assume a Cadeira de Economia Política na Universidade de Hamburgo e em 1897 leciona na Universidade de Heidelberg.

  7. Validation of TEMP: A finite line heat transfer code for geologic repositories for nuclear waste

    International Nuclear Information System (INIS)

    Atterbury, W.G.; Hetteburg, J.R.; Wurm, K.J.

    1987-09-01

    TEMP is a FORTRAN computer code for calculating temperatures in a geologic repository for nuclear waste. A previous report discusses the structure, usage, verification, and benchmarking of TEMP V1.0 (Wurm et al., 1987). This report discusses modifications to the program in the development of TEMP V1.1 and documents the validation of TEMP. The development of TEMP V1.1 from TEMP V1.0 consisted of two major efforts. The first was to recode several of the subroutines to improve logic flow and to allow for geometry-independent temperature calculation routines which, in turn, allowed for the addition of the geometry-independent validation option. The validation option provides TEMP with the ability to model any geometry of temperature sources with any step-wise heat release rate. This capability allows TEMP to model the geometry and heat release characteristics of the validation problems. The validation of TEMP V1.1 consists of the comparison of TEMP to three in-ground heater tests. The three tests chosen were Avery Island, Louisiana, Site A; Avery Island, Louisiana, Site C; and Asse Mine, Federal Republic of Germany, Site 2. TEMP shows marginal comparison with the two Avery Island sites and good comparison with the Asse Mine Site. 8 refs., 25 figs., 14 tabs

  8. KOMPOSISI ZAT GIZI TEMPE YANG DIFORTIFIKASI ZAT BESI DAN VITAMIN A PADA TEMPE MENTAH DAN MATANG (Nutritional Composition of Soyben Tempeh Fortified with Iron and Vitamin A on Uncook and Cook Soyben Tempeh

    Directory of Open Access Journals (Sweden)

    Rahayu Astuti

    2014-07-01

    pada tempe mentah maupun masak. Pada tempe mentah, meningkatnya kadar zat besi perlakuan meningkatkan kadar zat besi tempe fortifikasi meskipun tidak signifikan. Kadar protein dan lemak menurun secara bermakna setelah diolah (dibacem (p0,05. Kata kunci: Tempe terfortifikasi, zat besi, vitamin A, komposisi zat gizi

  9. Kadar Karbohidrat, Lemak, dan Protein pada Kecap dari Tempe

    OpenAIRE

    ARTINI PANGASTUTI; TJAHJADI PURWOKO,; YONA SEPTIANI

    2004-01-01

    Soy sauce as one of the soy fermented product could be produced through fermentation by molds and then fermentation by bacteria and yeasts, in salt solution (moromi). The aims of this research were to evaluate and to compare the value of carbohydrate), lipid, and protein in soy sauce which were produced from tempe by mixing Rhizopus oligosporus and R. oryzae with and without moromi fermentation; to compare the taste, aroma and color of soy sauce have been produced and commercial so...

  10. PEMBUATAN LARU TEMPE DAN PENGAMATAN KEKUATANNYA SELAMA PENYIMPANAN

    Directory of Open Access Journals (Sweden)

    Hermana Hermana

    2012-11-01

    Full Text Available Pembuatan laru tempe dan pengamatan kekuatannja selama penjimpanan. (Preparation of tempeh mold inoculum and observation on its activity during storage. "Laru" or tempeh mold inoculum can be made by growing tempeh mold on rice or "tiwul" (steamed cassava flour. Mold grown rice or "tiwul" is dried in the sun when the spores are fully mature. It is then ground to powder. The spores may also be taken from the dried rice or "tiwul" by rubbing them off with wheat flour. Rice flour or tapioca may be used as substitutes of wheat flour. The flours are also used to dilute the concentration of the spores in inoculum. Another type of tempeh mold in­oculum can be made by grinding dried tempeh into powder. "Laru" made by growing tempeh mold on rice is the best of the three, is easy to be prepared and is inexpensive. The self-life is at least six months when stored in a closed container at room temperature (25°C Walaupun laru murni tentu sangat baik, cara pembuatan laru murni seperti dikerjakan oleh Yap dan Stanton terlalu sulit dan mahal untuk dilaksanakan oleh pedagang tempe di Indonesia pada masa ini. Pada penelitian ini dicari cara pembuatan laru tempe yang mudal dilakukan dan murah, larunya dapat ditakar dan dapat disimpan lebih lama.

  11. Sociologie du travail et critique du temps industriel The Sociology of Labor and a critical vision of industrial Time

    Directory of Open Access Journals (Sweden)

    Jens Thoemmes

    2009-07-01

    Full Text Available La sociologie du travail a développé un point de vue particulier sur l'analyse des temporalités sociales. L'objectif de cet article est de montrer l'élaboration progressive d'une critique d'un temps industriel unique et unifiant. Cette critique s'appuie sur trois éléments : la multiplicité des temporalités de l’activité professionnelle, le caractère déstructurant du travail industriel et l'émergence d'un temps des loisirs. Ce point de vue a été élaboré par la sociologie du travail en France après 1945, notamment par Georges Friedmann, Pierre Naville et William Grossin.  Avant d’aborder cette période nous voudrions  interroger le moment de la fondation de la sociologie. En mobilisant des travaux peu connus de Max Weber sur le travail, nous verrons en quoi il est un précurseur de l’analyse des attitudes diversifiées des individus et des collectifs à l’égard du temps. Cette perspective lie, dès les premières enquêtes sociologiques, le travail industriel à une interrogation sur les temporalités.The sociology of work and labor developed a particular viewpoint on the analysis of social times. The objective of this article is to show how a criticism of a unique and unifying industrial time progressively grew up. Such criticism leans on three elements: the multiplicity of social times linked to the occupational activity, the disintegrating nature of work in the manufacturing process and the emergence of leisure-time. This point of view was elaborated by the sociology of work in France after 1945, notably by Georges Friedmann, Pierre Naville and William Grossin. Before approaching this period we question the moment of the foundation of sociology. By mobilizing little known research by Max Weber on the manufacturing process, we shall see in what way he was a precursor of the analysis of diversified attitudes regarding time by individuals and groups.

  12. PENGARUH KONSENTRASI PENAMBAHAN TEPUNG TEMPE TERHADAP KARAKTERISTIK TORTILLA LABU KUNING (The Effect of Tempe Flour Addition Concentration on Pumpkin Tortilla Characteristics

    Directory of Open Access Journals (Sweden)

    Merynda Indriyani Syafutri

    2014-10-01

    Full Text Available The objective of this research was to observe the physical and chemical characteristics of pumpkin tortilla with tempe flour addition. The experiment was designed using non Factorial Randomized Design with six treatments and each treatment was replicated three times.  The treatments were 5%, 10%, 15%, 20%, 25% and 30% addition of tempe flour per 90 g of tapioca. Texture, moisture content, ash content, and protein content were analyzed.  The results showed that the addition of tempe flour had significant effect on protein content. Pumpkin tortilla with tempe flour addition had 830.70 mm/s to 1316 mm/s of texture, 3.97% to 4.92% of moisture content, 1.22% to 1.48% of ash content, and 8.96% to 13.22% of protein content. Key words : pumpkin, tempe flour, tortilla

  13. A min-max variational principle

    International Nuclear Information System (INIS)

    Georgiev, P.G.

    1995-11-01

    In this paper a variational principle for min-max problems is proved that is of the same spirit as Deville-Godefroy-Zizler's variational principle for minimization problems. A localization theorem in which the mini-max points for the perturbed function with respect top a given ε-min-max point are localized is presented. 3 refs

  14. Du temps de travail au temps des marchés From working time to the time of the marketplace

    Directory of Open Access Journals (Sweden)

    Jens Thoemmes

    2009-11-01

    Full Text Available Nous avons emprunté à Le Goff, à la suite d’un retour au Moyen Âge, la métaphore de l’irruption du temps des marchands dans un monde prédominé par les activités agricoles. Nous avons retenu deux qualités de ce temps des marchands. La première concerne le rôle fondamental qu’ont joué les marchands pour contribuer à l’instauration d’une mesure précise du temps de travail. La seconde qualité du temps des marchands porte sur la maîtrise des risques et notamment sur le contrôle de la variabilité des prix. Nous retrouvons aujourd’hui ces caractéristiques à l’occasion d’un profond remaniement des temporalités : on passe du temps de travail au temps des marchés. Consécutivement aux lois Auroux de 1982, la variabilité devient un dispositif de la négociation collective servant à la mise en marché du temps de travail. Nous avons analysé comment en 20 ans de négociation collective, le travail du législateur et des négociateurs a amené un nouveau schème de la négociation collective. Ces échanges portent sur l’introduction d’une « norme variable » de la durée de travail qui s’est généralisée et sur la situation du «marché du travail » au niveau local et au niveau sociétal. Ces deux évolutions sont liées aux mouvements des marchés, des produits et de l’emploi, que les acteurs de la négociation cherchent à contrôler en mettant en œuvre des logiques prévisionnelles et provisionnelles.Following in Le Goff’s footsteps, inspired by the Middle Ages, we use the metaphor of the eruption of merchants’ time in a world dominated by agricultural activities. We retain two qualities of this sort of time. The first relates to the fundamental role which merchants played in the introduction of a precise measurement of working time. The second quality of merchants’ time relates to risk control and especially to controlling price variability. We find these features today in France: temporalities

  15. Gas turbines

    Energy Technology Data Exchange (ETDEWEB)

    Farahan, E.; Eudaly, J.P.

    1978-10-01

    This evaluation provides performance and cost data for commercially available simple- and regenerative-cycle gas turbines. Intercooled, reheat, and compound cycles are discussed from theoretical basis only, because actual units are not currently available, except on a special-order basis. Performance characteristics investigated include unit efficiency at full-load and off-design conditions, and at rated capacity. Costs are tabulated for both simple- and regenerative-cycle gas turbines. The output capacity of the gas turbines investigated ranges from 80 to 134,000 hp for simple units and from 12,000 to 50,000 hp for regenerative units.

  16. PENERAPAN SISTEM HAZARD ANALYSIS CRITICAL CONTROL POINT (HACCP PADA PROSES PEMBUATAN KERIPIK TEMPE

    Directory of Open Access Journals (Sweden)

    Rahmi Yuniarti

    2015-06-01

    Full Text Available Malang is one of the industrial centers of tempe chips. To maintain the quality and food safety, analysis is required to identify the hazards during the production process. This study was conducted to identify the hazards during the production process of tempe chips and provide recommendations for developing a HACCP system. The phases of production process of tempe chips are started from slice the tempe, move it to the kitchen, coat it with flour dough, fry it in the pan, drain it, package it, and then storage it. There are 3 types of potential hazards in terms of biological, physical, and chemical during the production process. With the CCP identification, there are three processes that have Critical Control Point. There are the process of slicing tempe, immersion of tempe into the flour mixture and draining. Recommendations for the development of HACCP systems include recommendations related to employee hygiene, supporting equipment, 5-S analysis, and the production layout.

  17. Pelton turbines

    CERN Document Server

    Zhang, Zhengji

    2016-01-01

    This book concerns the theoretical foundations of hydromechanics of Pelton turbines from the engineering viewpoint. For reference purposes, all relevant flow processes and hydraulic aspects in a Pelton turbine have been analyzed completely and systematically. The analyses especially include the quantification of all possible losses existing in the Pelton turbine and the indication of most available potential for further enhancing the system efficiency. As a guideline the book therefore supports further developments of Pelton turbines with regard to their hydraulic designs and optimizations. It is thus suitable for the development and design engineers as well as those working in the field of turbo machinery. Many laws described in the book can also be directly used to simplify aspects of computational fluid dynamics (CFD) or to develop new computational methods. The well-executed examples help better understand the related flow mechanics.

  18. Max Reinharz (1923-2012)

    CERN Multimedia

    2013-01-01

    Max Reinharz was born in Vienna, Austria, in 1923. In 1939 he was obliged to emigrate to the UK. At the beginning of the Second World War he was interned as an enemy alien and then deported to Australia at a time when the British feared an invasion by Germany. He returned to the UK in 1943 and joined the British Army. After he was demobbed in 1947, he studied physics in Vienna, where he took his doctorate in 1953.   Max Reinharz (centre) with Gordon Munday (left) and Henri Laporte (right) in 1979. After working in Brussels, at the physics Institute of Genoa and the University of Pisa, he joined CERN in 1960 as a fellow and in 1964 became a senior physicist in the NP Division. His name is associated with many publications, such as those of the CERN neutrino experiment and the CERN-Geneva-Lund collaboration to verify T symmetry conservation in lambda decays. He then joined a small team in the Proton Synchrotron Division (MPS) responsible for assisting external physics groups to prepare and i...

  19. HuMax-CD4

    DEFF Research Database (Denmark)

    Skov, Lone; Kragballe, Knud; Zachariae, Claus

    2003-01-01

    BACKGROUND: Psoriasis is characterized by infiltration with mononuclear cells. Especially activated memory CD4+ T cells are critical in the pathogenesis. Interaction between the CD4 receptor and the major histocompatibility complex class II molecule is important for T-cell activation. OBJECTIVE......: To test safety and efficacy of a fully human monoclonal anti-CD4 antibody (HuMax-CD4) in the treatment of psoriasis. DESIGN: Multicenter, double-blind, placebo-controlled, randomized clinical trial. Patients Eighty-five patients with moderate to severe psoriasis. INTERVENTIONS: Subcutaneous infusions...... dose level, 6 (38%) of 16 patients obtained more than 25% reduction of PASI and 3 (19%) obtained more than 50% reduction of PASI. A dose-dependent decrease in total lymphocyte count was seen and was parallel to a dose-dependent decrease in CD4+ T cells. This decrease was due to a decrease in the memory...

  20. German science. Max Planck charts new path.

    Science.gov (United States)

    Koenig, R

    2000-06-09

    Germany's premier basic research organization, the Max Planck Society, released a long-awaited blueprint for change during its annual meeting this week, recommending that the society's nearly 3000 scientists embrace more interdisciplinary and international projects in a range of new research priorities. The report, called Max Planck 2000-Plus, is the product of an 18-month-long internal review. Its recommendations were formulated by some two dozen Max Planck researchers and administrators, who sought input from every institute.

  1. Wind turbine

    Science.gov (United States)

    Cheney, Jr., Marvin C.

    1982-01-01

    A wind turbine of the type having an airfoil blade (15) mounted on a flexible beam (20) and a pitch governor (55) which selectively, torsionally twists the flexible beam in response to wind turbine speed thereby setting blade pitch, is provided with a limiter (85) which restricts unwanted pitch change at operating speeds due to torsional creep of the flexible beam. The limiter allows twisting of the beam by the governor under excessive wind velocity conditions to orient the blades in stall pitch positions, thereby preventing overspeed operation of the turbine. In the preferred embodiment, the pitch governor comprises a pendulum (65,70) which responds to changing rotor speed by pivotal movement, the limiter comprising a resilient member (90) which engages an end of the pendulum to restrict further movement thereof, and in turn restrict beam creep and unwanted blade pitch misadjustment.

  2. Mastering Autodesk 3ds Max 2013

    CERN Document Server

    Harper, Jeffrey

    2012-01-01

    Get professional training in 3ds Max from this Autodesk Official Training Guide Extremely popular with video game designers as well as architects, 3ds Max offers integrated 3D modeling, animation, rendering, and compositing tools designed to streamline production. If you already have a working knowledge of 3ds Max basics, this official guide will take your skills to the next level. Detailed tutorials cover all the latest features of 3ds Max. From modeling, texturing, animation, and architectural visualization to high-level techniques for film, television, games, and more, this book provides

  3. Product information affects perception of sensory, collative properties and elicited emotions of Indonesian tempe

    DEFF Research Database (Denmark)

    Fibri, Dwi Larasatie Nur; Frøst, Michael Bom

    The effects of product information given to consumers were evaluated on sensory and collative properties of tempe, a traditional Indonesian food. A consumer test on 9 different types of tempe (5 traditionally tempe and 4 more modernized version of tempe) was carried out with 175 Indonesian...... methods, where the traditional was most different from partly modernized and fully modernized. However, interaction is not systematic whether on bean or production type. Information changed the perception on sensory and collative properties of the products. The results demonstrate the powerful effect...... of sensory properties, rating of collative properties and elicited emotions. The results show astonishingly large effects of the information (table 1 and 2). The 5 traditional tempes (produced from velvet bean, black soybean, mungbean, jackbean, and local yellow soybean, all inoculated with traditional usar...

  4. Les modalités du temps chez Benjamin Franklin

    OpenAIRE

    Marienstras, Elise

    2010-01-01

    La renommée multiséculaire de Benjamin Franklin tient surtout à sa qualité d'homme des Lumières. Cet article s'intéresse à l'extrême complexité de sa pensée sur le temps comme concept, comme mode de vie, comme outil pour s'enrichir, et comme vision générale du progrès du genre humain.The long-lasting fame of Benjamin Franklin rests principally on his characteristics as a scientist and a philosopher of the Enlightenment. This article raises the question of Franklin's conception of time and exa...

  5. Les modalités du temps chez Benjamin Franklin

    Directory of Open Access Journals (Sweden)

    Elise Marienstras

    2010-01-01

    Full Text Available La renommée multiséculaire de Benjamin Franklin tient surtout à sa qualité d'homme des Lumières. Cet article s'intéresse à l'extrême complexité de sa pensée sur le temps comme concept, comme mode de vie, comme outil pour s'enrichir, et comme vision générale du progrès du genre humain.The long-lasting fame of Benjamin Franklin rests principally on his characteristics as a scientist and a philosopher of the Enlightenment. This article raises the question of Franklin's conception of time and examines his numerous uses of « time » as a concept, as a way of living, as a means to obtain wealth, as a general vision of the progress of mankind.

  6. Reinforced flexural elements for TEMP-STRESS Program

    International Nuclear Information System (INIS)

    Marchertas, A.H.; Kennedy, J.M.; Pfeiffer, P.A.

    1987-06-01

    The implementation of reinforced flexural elements into the thermal-mechanical finite element program TEMP-STRESS is described. With explicit temporal integration and dynamic relaxation capabilities in the program, the flexural elements provide an efficient method for the treatment of reinforced structures subjected to transient and static loads. The capability of the computer program is illustrated by the solution of several examples: the simulation of a reinforced concrete beam; simulations of a reinforced concrete containment shell which is subjected to internal pressurization, thermal gradients through the walls, and transient pressure loads. The results of this analysis are relevant in the structural design/safety evaluations of typical reactor containment structures. 22 refs., 13 figs

  7. Factors Influencing Water Consumption in Multifamily Housing in Tempe Arizona

    Science.gov (United States)

    Wentz, E. A.

    2012-12-01

    Central to the "Smart Growth" movement is that compact development reduces vehicle miles traveled, carbon emissions, and water use. Empirical efforts to evaluate compact development have examined residential densities, but have not distinguished decreasing lot sizes from multifamily apartments as mechanisms for compact development. Efforts to link design features to water use have emphasized single-family at the expense of multifamily housing. This study isolates the determinants of water use in large (>50) unit apartment complexes in the city of Tempe, Arizona. In July 2007, per-bedroom water use increased with pool area, dishwashers, in-unit laundry facilities, and irrigated landscaping. We explain nearly 50% of the variation in water use with these variables. These results inform public policy for reducing water use in multifamily housing structures, suggesting strategies to construct and market "green" apartment units.

  8. Louise Fines, Recherche qualitative et cyber-espace-temps, 2011

    Directory of Open Access Journals (Sweden)

    Natalia Leclerc

    2011-07-01

    Full Text Available L’ouvrage de Louise Fines s’intéresse au recours aux médias en temps réel pour analyser les processus sociaux contemporains, et en particulier les crimes « en col blanc ». Il prend pour illustration l’affaire Enron, scandale financier qui a secoué les États-Unis en 2001. Son intérêt majeur est la présentation d’une méthodologie, celle du jeu, et le rappel des grands principes de recherche. Le lecteur peut toutefois rester sur sa faim : le discours fournit des grandes orientations, de nombreus...

  9. La quête des températures ultrabasses

    OpenAIRE

    Suchet , Daniel

    2018-01-01

    International audience; Des vendeurs de glace à l'industrie cryogénique, le froid est souvent perçu comme un produit. Pour le physicien, le froid, réduction de l'agitation aléatoire des particules, apparaît plutôt comme une force productrice, capable de faire émerger des structures complexes et de métamorphoser les propriétés des objets. Les basses températures ont été l'enjeu d'une course effrénée dont la première phase a pris fin en 1908 avec la liquéfaction de l'ensemble des gaz connus. Lo...

  10. Etudes sur le Portugal au Temps de l'Humanisme

    Directory of Open Access Journals (Sweden)

    J. Cruz Costa

    1953-06-01

    Full Text Available BATAILLON (Marcel. — Etudes sur le Portugal au Temps de l'Humanisme.  Acta Universitatis Conimbrigencis, 1952, 309 pp. (Primeiro Parágrafo do Artigo O Prof. Marcel Bataillon, erudito dos mais inteligentes da França atual, autor de uma obra que é hoje impr:scindível para quem pretenda estudar o humanismo renascentista na Espanha ou em Portugal, diríamos melhor, talvez: para quem pretenda estudar o Humanismo e a Renascença, — acaba de publicar, na coleção Acta Universitatis Conimbrigencis, êste volume no qual reune alguns trabalhos da mais alta importância para o conhecimento de muitos aspectos da vida espiritual portuguêsa do século XVI.

  11. Max Jakobson õiendab arveid ajalooga / Imbi Paju

    Index Scriptorium Estoniae

    Paju, Imbi, 1959-

    2003-01-01

    Soome politoloogi ja diplomaadi Max Jakobsoni raamatust "Tilinpäätos" ("Arve sulgemine"), milles ta käsitleb Eesti ja Soome suhteid 20. sajandil. Vt samas: Lennart Meri meelitas Jakobsoni sõjakuritegusid uurima; lühiintervjuu Max Jakobsoniga

  12. Veteranpoliitik Max Jakobson õpetab ajalugu / Sirje Kiin

    Index Scriptorium Estoniae

    Kiin, Sirje, 1949-

    1998-01-01

    Soome sõltumatu välispoliitika konsultant ja ajakirjanik Max Jakobson. Ülevaade Max Jakobsoni intervjuust soomerootsi majandusajakirjale "Forum för ekonomi och teknik" 1998. aasta aprillinumbris Venemaa Baltimaade-vastasest propagandast ning EL-i ja NATO laienemisest

  13. Comparison of loads for wind turbine down-regulation strategies

    DEFF Research Database (Denmark)

    Zhu, Jiangsheng; Ma, Kuichao; N. Soltani, Mohsen

    2017-01-01

    For wind farm active power setpoint tracking, both farm level and turbine level down regulation strategies should to be optimized. Several down regulation strategies are chosen to analyse the wind turbine load performance according to different wind speed and power reference. In this paper we...... suggest appropriate down regulation strategy to control wind turbine for active power reference tracking. we compare four different control strategies, namely Const-Ω, Const-λ, Max-Ω and Min-Ct and discuss the loads on main components and downwind speed by presenting analysis of several wind scenarios...

  14. Hydraulic turbines and auxiliary equipment

    Energy Technology Data Exchange (ETDEWEB)

    Luo Gaorong [Organization of the United Nations, Beijing (China). International Centre of Small Hydroelectric Power Plants

    1995-07-01

    This document presents a general overview on hydraulic turbines and auxiliary equipment, emphasizing the turbine classification, in accordance with the different types of turbines, standard turbine series in China, turbine selection based on the basic data required for the preliminary design, general hill model curves, chart of turbine series and the arrangement of application for hydraulic turbines, hydraulic turbine testing, and speed regulating device.

  15. Fixation à haute et moyenne température de l'hydrogène sulfuré par des masses de captation régénérables Hydrogen-Sulfide Fixation At High and Medium Temperature by Regenerable Capture Masses

    OpenAIRE

    Hotier G.

    2006-01-01

    L'intérêt de la désulfuration haute température comparée à la même opération conduite à basse température est renforcé quand la désulfuration a lieu entre deux opérations de niveau thermique élevé comme la gazéification du charbon et la production d'électricité par cycles combinés turbine à gaz-turbine à vapeur. Les masses absorbantes à base d'oxyde de fer peuvent réaliser une bonne désulfuration mais résistent mal aux chocs thermiques. Un agent de régénération particulièrement efficace est l...

  16. WiMax network planning and optimization

    CERN Document Server

    Zhang, Yan

    2009-01-01

    This book offers a comprehensive explanation on how to dimension, plan, and optimize WiMAX networks. The first part of the text introduces WiMAX networks architecture, physical layer, standard, protocols, security mechanisms, and highly related radio access technologies. It covers system framework, topology, capacity, mobility management, handoff management, congestion control, medium access control (MAC), scheduling, Quality of Service (QoS), and WiMAX mesh networks and security. Enabling easy understanding of key concepts and technologies, the second part presents practical examples and illu

  17. Introducing Autodesk 3ds Max 2011

    CERN Document Server

    Derakhshani, Dariush

    2010-01-01

    An Autodesk Official Training Guide to 3ds Max 2011. 3ds Max is a popular 3D animation-and-effects software used in movies, visual effects, games, cartoons, short films, commercials, and other animation. However, it also presents a number of challenges to newcomers. This introduction to the latest version breaks down the complexities of learning 3D software and walks you through the basics of modeling, texturing, animating, and using visual effects. Real-world examples from talented beginning 3ds max users motivate you to learn the software and helpful tutorials offer realistic, professional c

  18. Turbine stage model

    International Nuclear Information System (INIS)

    Kazantsev, A.A.

    2009-01-01

    A model of turbine stage for calculations of NPP turbine department dynamics in real time was developed. The simulation results were compared with manufacturer calculations for NPP low-speed and fast turbines. The comparison results have shown that the model is valid for real time simulation of all modes of turbines operation. The model allows calculating turbine stage parameters with 1% accuracy. It was shown that the developed turbine stage model meets the accuracy requirements if the data of turbine blades setting angles for all turbine stages are available [ru

  19. Rééquilibrage des temps autour de la retraite

    Directory of Open Access Journals (Sweden)

    Anca Boboc

    2012-06-01

    Full Text Available Le passage à la retraite ne se réduit pas à une date séparant hermétiquement deux périodes disjointes de l’existence. D’une part, ce passage présente une certaine durée, s’étendant de part et d’autre de la date formelle de « cessation d’activité ». D’autre part, le temps de la retraite est aussi l’occasion d’entreprendre des activités qui, nouvelles ou en prolongement, s’inscrivent dans le parcours antérieur des individus. Plus précisément, ce passage particulier est l’occasion de repenser l’organisation des différentes temporalités sociales, d’articuler différemment activités professionnelles — pour ceux qui cumulent emploi et retraite —, associatives, familiales, artistiques, ludiques, etc. Il en résulte une diversité des parcours de retraite, comme permet de l’apprécier la variété des activités qu’entreprennent les retraités. Si cette diversité est le reflet d’une certaine autonomie dans les choix des acteurs, elle dépend également des libertés de choix — « capacités » — qui leur sont réellement accessibles. Dans ce sens, l’article examine les apports et les limites d’un raisonnement en termes d’« environnement capacitant », pour rendre compte de l’inégale distribution des capacités à s’emparer des opportunités offertes par la retraite.Plus précisément, l’environnement capacitant désignera l’ensemble constitué des cadres temporels dans lesquels les individus construisent leurs parcours de vie avant la retraite. Dans ce sens, on peut identifier trois cadres temporels constitutifs des parcours de vie : l’axe des politiques macro-économiques, celui des politiques d’entreprise (ou sectorielles et celui des biographies familiales. Chacun de ces trois cadres est lui-même le lieu d’une tension entre « temps comptables » rigides et « temps vécus » caractérisés par une plus grande souplesse temporelle. Selon la résultante de ces

  20. La renaissance du temps pour en finir avec la crise de la physique

    CERN Document Server

    Smolin, Lee

    2014-01-01

    La question du Temps est au coeur de toutes les problématiques scientifiques, de la cosmologie à la mécanique quantique. L’un des plus grands physiciens d’aujourd’hui, Lee Smolin, expose sa conception du Temps et ses implications sur la perception de notre environnement. Le Temps est-il une illusion qui cache une vérité éternelle, ou une réalité physique de notre Univers ? Lee Smolin opte pour la réalité du Temps, s’opposant en cela à la majorité des penseurs, physiciens ou philosophes, inspirés pour les uns par la théorie de la Relativité d’Einstein et pour les autres par les idées platoniciennes.

  1. La maîtrise du temps comme enjeu de lutte

    OpenAIRE

    Bureau, Marie-Christine; Corsani, Antonella

    2012-01-01

    Le conflit social autour de la réforme du régime d'assurance chômage des intermittents du spectacle a été marqué par son intensité et par sa durée. La thèse défendue ici est que la maîtrise du temps constitue l’un des enjeux majeurs de ce conflit. L'affrontement sur le terrain économique de la régulation de l'emploi et de l'industrie culturelle s'est doublé de l'affrontement sur le temps. La question du temps ne se limite pas à la régulation du temps de travail, elle concerne la maîtrise du t...

  2. Microspectroscopy At Beamline 73 MAX-lab

    International Nuclear Information System (INIS)

    Engdahl, Anders

    2010-01-01

    Presentation of some projects at the infrared microspectroscopy experimental station at beamline 73 MAX-lab. Among the subjects are found identification of organic residues in fossil material and examination of the chemistry in an old oak wood wreck.

  3. Approximation by max-product type operators

    CERN Document Server

    Bede, Barnabás; Gal, Sorin G

    2016-01-01

    This monograph presents a broad treatment of developments in an area of constructive approximation involving the so-called "max-product" type operators. The exposition highlights the max-product operators as those which allow one to obtain, in many cases, more valuable estimates than those obtained by classical approaches. The text considers a wide variety of operators which are studied for a number of interesting problems such as quantitative estimates, convergence, saturation results, localization, to name several. Additionally, the book discusses the perfect analogies between the probabilistic approaches of the classical Bernstein type operators and of the classical convolution operators (non-periodic and periodic cases), and the possibilistic approaches of the max-product variants of these operators. These approaches allow for two natural interpretations of the max-product Bernstein type operators and convolution type operators: firstly, as possibilistic expectations of some fuzzy variables, and secondly,...

  4. Max Reinhardt Haus Berliini / Triin Ojari

    Index Scriptorium Estoniae

    Ojari, Triin, 1974-

    1998-01-01

    Arhitekt Peter Eisenmani projekteeritud multifunktsionaalne maja on planeeritud II maailmasõjas hävinud Max Reinhardti teatrihoone kohale. Ühte hoonetahukasse kui uude maamärki on 'volditud' kokku aktiivse linnaelu kõik aspektid.

  5. WiMAX technology and network evolution

    CERN Document Server

    Etemad, Kamran

    2010-01-01

    WiMAX, the Worldwide Interoperability for Microwave Access, represents a paradigm shift in telecommunications technology. It offers the promise of cheaper, smaller, and simpler technology compared to existing broadband options such as DSL, cable, fiber, and 3G wireless.

  6. L’Imaginaire du temps dans le fantastique et la science-fiction (2011

    Directory of Open Access Journals (Sweden)

    Julie Schutz

    2013-04-01

    Full Text Available Ce numéro des cahiers du LAPRIL contient vingt-deux contributions sur la question du temps en science-fiction et dans le fantastique, dans sa dimension thématique, mais aussi pour faire ressortir l'influence de cette question sur l'évolution même de ces genres. Une partie des réflexions concerne aussi les représentations d'un temps « mythique ».

  7. L’Imaginaire du temps dans le fantastique et la science-fiction (2011)

    OpenAIRE

    Julie Schutz

    2013-01-01

    Ce numéro des cahiers du LAPRIL contient vingt-deux contributions sur la question du temps en science-fiction et dans le fantastique, dans sa dimension thématique, mais aussi pour faire ressortir l'influence de cette question sur l'évolution même de ces genres. Une partie des réflexions concerne aussi les représentations d'un temps « mythique ».

  8. Tukey max-stable processes for spatial extremes

    KAUST Repository

    Xu, Ganggang; Genton, Marc G.

    2016-01-01

    We propose a new type of max-stable process that we call the Tukey max-stable process for spatial extremes. It brings additional flexibility to modeling dependence structures among spatial extremes. The statistical properties of the Tukey max

  9. PENGEMBANGAN PERSAMAAN VO2 MAX DAN EVALUASI HR MAX (STUDI AWAL PADA PEKERJA PRIA

    Directory of Open Access Journals (Sweden)

    Purnawan Adi Wicaksono

    2012-10-01

    Full Text Available Kapasitas fisik maksimum seseorang direpresentasikan dengan nilai konsumsi oksigen maksimum (VO2 Max dan denyut nadi maksimum (HR Max yang memberikan suatu informasi batasan kemampuan fisik maksimum seseorang dalam melakukan pekerjaan. Penelitian kali ini mempunyai tujuan untuk mencari nilai VO2 Max pekerja pria Indonesia untuk nantinya akan dikembangkan suatu persamaan prediksi VO2 Max yang didekati dengan hubungan linier antara denyut nadi (Heart Rate seperti yang dilakukan Astrand (2003, tinggi badan (Chatterjee et al, 2006, berat badan (Akalan et al, 2008, usia (Magrani et al, 2009 dan mengevaluasi persamaan HR Max manakah yang dapat diaplikasikan untuk mendekati nilai denyut nadi maksimum pekerja Indonesia. Responden dalam penelitian kali ini adalah 12  pekerja industri pria yang diambil dari beberapa industri di Depok dan sekitarnya. Kriteria responden yang berpartisipasi dalam penelitian kali ini adalah: berusia 20-40 tahun, bukan perokok baik aktif maupun pasif, sehat , tidak mengkonsumsi makanan, kafein, alkohol minimal 2 jam sebelum eksperimen (Balderrama et. al, 2007.Eksperimen yang dilakukan menggunakan metode maximal test dengan protokol treadmill. Adapun peralatan yang digunakan adalah seperangkat alat pengukur kondisi fisiologi Fitmate MED (COSMED srl-Italy terdiri dari Heart Rate Transmitter, Heart Rate Receiver, V mask (Hans Rudolph Inc,dan treadmill SportArt@60.  Eksperimen dilakukan menjadi dua bagian, yaitu istirahat dan tahap bekerja.Aktivitas istirahat terdiri dari tidur selama 20 menit, duduk selama 20 menit dan berdiri selama 10 menit. Eksperimen tahap kedua yaitu tahap kerja yang terdiri dari latihan selama 5 menit. Responden dipersilakan beristirahat selama 15 menit, setelah itu responden melaksanakan maximal test detik hingga responden merasa tidak sanggup lagi melanjutkan eksperimen. Hasil penelitian model prediksi VO2 max untuk pekerja industri pria mempunyai nilai 2,78 ± 0,5 liter/menit dan dengan regresi linier

  10. ANALISIS POSISI BERSAING UNTUK MENENTUKAN STRATEGI PEMASARAN INDUSTRI KRIPIK TEMPE DI KOTA MALANG

    Directory of Open Access Journals (Sweden)

    Rusno Rusno

    2014-11-01

    Full Text Available Industri kripik tempe di desa Sanan Malang merupakan bagian dari UMKM mengalami perkembang-an yang cukup baik. Hingga akhir tahun 2013 kemarin berjumlah kurang lebih 65 pengrajin, bahkan saat ini Sanan sudah menjadi sentra industri kecil penghasil kripik tempe dan menjadi salah satu pro-duk unggulan kota Malang. Namun dalam perjalanannya industri ini banyak mengalami masalah diantaranya banyak pesaing yang terus masuk dalam bisnis ini. Hal ini mengakibatkan persaingan yang semakin ketat sehingga para pelaku harus dapat menentukan strategi untuk dapat memenangkan persaingan, maka Tujuan dalam penelitian ini adalah untuk mengetahui bagaimana posisi bersaing dan penetapan strategi pemasaran produsen kripik tempe di kota Malang. Jenis penelitian ini adalah confirmatory research. Sebagai populasinya adalah pengusaha kripik tempe yang berlokasi di kecamatan Blimbing kota Malang yang berjumlah 65 pemilik home industri. Sampel dilakukan dengan teknik Simple random sampling berjumlah 33 pengusaha industri kripik tempe. Pengambilan data dilakukan dengan kuesioner, dan teknik analisis data dengan teknik deskriptif dan tabulasi silang. Berdasarkan analisis data didapatkan hasil penelitian bahwa posisi bersaing industri kripik tempe di Sanan terdapat 4 cluster yang terbagi dalam : Cluster 1 (pemimpin pasar/market leader beranggota-kan 1 perusahaan. Cluster 2(penceruk pasar/market nicher beranggotakan 13 perusahaan, Cluster 3 (penantang pasar/market challenger beranggotakan 8 perusahaan dan cluster 4 (pengikut pasar /market follower beranggotakan 11 perusahaan. 

  11. Fermented soya bean (tempe) extracts reduce adhesion of enterotoxigenic Escherichia coli to intestinal epithelial cells.

    Science.gov (United States)

    Roubos-van den Hil, P J; Nout, M J R; Beumer, R R; van der Meulen, J; Zwietering, M H

    2009-03-01

    This study aimed to investigate the effect of processed soya bean, during the successive stages of tempe fermentation and different fermentation times, on adhesion of enterotoxigenic Escherichia coli (ETEC) K88 to intestinal brush border cells as well as Caco-2 intestinal epithelial cells; and to clarify the mechanism of action. Tempe was prepared at controlled laboratory scale using Rhizopus microsporus var. microsporus as the inoculum. Extracts of raw, soaked and cooked soya beans reduced ETEC adhesion to brush border cells by 40%. Tempe extracts reduced adhesion by 80% or more. ETEC adhesion to Caco-2 cells reduced by 50% in the presence of tempe extracts. ETEC K88 bacteria were found to interact with soya bean extracts, and this may contribute to the observed decrease of ETEC adhesion to intestinal epithelial cells. Fermented soya beans (tempe) reduce the adhesion of ETEC to intestinal epithelial cells of pig and human origin. This reduced adhesion is caused by an interaction between ETEC K88 bacteria and soya bean compounds. The results strengthen previous observations on the anti-diarrhoeal effect of tempe. This effect indicates that soya-derived compounds may reduce adhesion of ETEC to intestinal cells in pigs as well as in humans and prevent against diarrhoeal diseases.

  12. Microstructure and Oxidation of a MAX Phase/Superalloy Hybrid Interface

    Science.gov (United States)

    Smialek, James L.; Garg, Anita

    2014-01-01

    Corrosion resistant, strain tolerant MAX phase coatings are of interest for turbine applications. Thin Cr2AlC MAX phase wafers were vacuum diffusion bonded to an advanced turbine disk alloy, LSHR, at 1100 C. The interface, examined by optical and scanning electron microscopy, revealed a primary diffusion zone consisting of 10 micrometers of beta-Ni(Co)Al, decorated with various NiCoCrAl, MC and M3B2 precipitates. On the Cr2AlC side, an additional 40 micrometers Al-depletion zone of Cr7C3 formed in an interconnected network with the beta-Ni(Co)Al. Oxidation of an exposed edge at 800 C for 100 h produced a fine-grained lenticular alumina scale over Cr2AlC and beta-Ni(Co)Al, with coarser chromia granules over the Cr7C3 regions. Subsequent growth of the diffusion layers was only 5 micrometers in total. A residual stress of 500 MPa was estimated for the MAX phase layer, but no interfacial damage was observed. Subsequent tests for 1000 h reveal similar results.

  13. Min-Max Spaces and Complexity Reduction in Min-Max Expansions

    Energy Technology Data Exchange (ETDEWEB)

    Gaubert, Stephane, E-mail: Stephane.Gaubert@inria.fr [Ecole Polytechnique, INRIA and CMAP (France); McEneaney, William M., E-mail: wmceneaney@ucsd.edu [University of California San Diego, Dept. of Mech. and Aero. Eng. (United States)

    2012-06-15

    Idempotent methods have been found to be extremely helpful in the numerical solution of certain classes of nonlinear control problems. In those methods, one uses the fact that the value function lies in the space of semiconvex functions (in the case of maximizing controllers), and approximates this value using a truncated max-plus basis expansion. In some classes, the value function is actually convex, and then one specifically approximates with suprema (i.e., max-plus sums) of affine functions. Note that the space of convex functions is a max-plus linear space, or moduloid. In extending those concepts to game problems, one finds a different function space, and different algebra, to be appropriate. Here we consider functions which may be represented using infima (i.e., min-max sums) of max-plus affine functions. It is natural to refer to the class of functions so represented as the min-max linear space (or moduloid) of max-plus hypo-convex functions. We examine this space, the associated notion of duality and min-max basis expansions. In using these methods for solution of control problems, and now games, a critical step is complexity-reduction. In particular, one needs to find reduced-complexity expansions which approximate the function as well as possible. We obtain a solution to this complexity-reduction problem in the case of min-max expansions.

  14. TEMPS, 1-Group Time-Dependent Pulsed Source Neutron Transport

    International Nuclear Information System (INIS)

    Ganapol, B.D.

    1988-01-01

    1 - Description of program or function: TEMPS numerically determines the scalar flux as given by the one-group neutron transport equation with a pulsed source in an infinite medium. Standard plane, point, and line sources are considered as well as a volume source in the negative half-space in plane geometry. The angular distribution of emitted neutrons can either be isotropic or mono-directional (beam) in plane geometry and isotropic in spherical and cylindrical geometry. A general anisotropic scattering Kernel represented in terms of Legendre polynomials can be accommodated with a time- dependent number of secondaries given by c(t)=c 0 (t/t 0 ) β , where β is greater than -1 and less than infinity. TEMPS is designed to provide the flux to a high degree of accuracy (4-5 digits) for use as a benchmark to which results from other numerical solutions or approximations can be compared. 2 - Method of solution: A semi-analytic Method of solution is followed. The main feature of this approach is that no discretization of the transport or scattering operators is employed. The numerical solution involves the evaluation of an analytical representation of the solution by standard numerical techniques. The transport equation is first reformulated in terms of multiple collisions with the flux represented by an infinite series of collisional components. Each component is then represented by an orthogonal Legendre series expansion in the variable x/t where the distance x and time t are measured in terms of mean free path and mean free time, respectively. The moments in the Legendre reconstruction are found from an algebraic recursion relation obtained from Legendre expansion in the direction variable mu. The multiple collision series is evaluated first to a prescribed relative error determined by the number of digits desired in the scalar flux. If the Legendre series fails to converge in the plane or point source case, an accelerative transformation, based on removing the

  15. Determination of angular rotation velocity of Dar'e wind turbine with straight blades

    International Nuclear Information System (INIS)

    Ershina, A.K.; Ershin, Sh.A.; Upnanov, T.K.

    1999-01-01

    In the report the method of angular velocity determination for wind turbine of given capacity with allowing for an average seasonal wind velocity and all geometrical and dynamical characteristics of the unit is presented. It is noted, that this wind turbine has following advantages: wind direction does not plays role due to vertical axis position of the turbine; electric generator and other equipment are arranged on the ground, that reduce construction's weight, expedite of servicing and repair; the wind turbine has high coefficient of wind energy use (ξ max =0.45)

  16. Au fil du temps (1976 ou la loi du seuil

    Directory of Open Access Journals (Sweden)

    Isabelle Singer

    2010-04-01

    Full Text Available Ayant choisi de vivre dans un camion, les héros d’Au fil du temps (film de Wim Wenders de 1976 font du seuil une expérience particulière. Celle de la rupture avec toute idée de foyer et celle du refus d’appartenance à la terre natale, cette terre allemande traversée par une frontière le long de laquelle ils vont voyager, et qui les renvoie à chaque instant aux traumatismes de l’Histoire. Sur le pare-brise du camion, l’extérieur (campagnes indifférenciées, villes à l’abandon… et l’intérieur se superposent. Au fil du temps questionne le paysage : il s’agit d’en décoller un à un les mythes qui le recouvrent. L’image alors n’est plus surface mais volume à traverser, à lacérer et découvrir ce qui est tissé dans le paysage. La démarche de Wenders est alors proche de celle d’un de ses contemporains : Anselm Kiefer. Le paysage allemand provoque le rejet parce qu’il y a là toujours plus que le visible : des strates et des strates de culpabilité que le mythe - et c’est sa fonction - a recouvert. Et qu’il s’agira ici, de soulever. Le choix du nomadisme, c’est celui d’un état de l’humanité antérieur à l’idée de patrie. Et c’est aussi celui de la solitude, comme prix à payer à ce refus d’appartenance et à cette mise à jour des mythes. L’appartenance à la terre allemande et à son Histoire est profondément problématique parce que les pères sont fondamentalement coupables. On se reconnaîtra alors des pères de substitution : des pères de cinéma (Nicholas Ray ou Fritz Lang. Et l’on substituera l’Histoire du cinéma à l’Histoire. Bruno est réparateur ambulant de projecteurs et Au fil du temps dressera, au gré de ses pérégrinations, un état des lieux du cinéma allemand des années soixante-dix : déliquescent, colonisé par les images hollywoodiennes. Il faut que cela change : état du cinéma ; état des protagonistes solitaires en quête d’une identit

  17. Turbine main engines

    CERN Document Server

    Main, John B; Herbert, C W; Bennett, A J S

    1965-01-01

    Turbine Main Engines deals with the principle of operation of turbine main engines. Topics covered include practical considerations that affect turbine design and efficiency; steam turbine rotors, blades, nozzles, and diaphragms; lubricating oil systems; and gas turbines for use with nuclear reactors. Gas turbines for naval boost propulsion, merchant ship propulsion, and naval main propulsion are also considered. This book is divided into three parts and begins with an overview of the basic mode of operation of the steam turbine engine and how it converts the pressure energy of the ingoing ste

  18. Turbine system and adapter

    Science.gov (United States)

    Hogberg, Nicholas Alvin; Garcia-Crespo, Andres Jose

    2017-05-30

    A turbine system and adapter are disclosed. The adapter includes a turbine attachment portion having a first geometry arranged to receive a corresponding geometry of a wheelpost of a turbine rotor, and a bucket attachment portion having a second geometry arranged to receive a corresponding geometry of a root portion of a non-metallic turbine bucket. Another adapter includes a turbine attachment portion arranged to receive a plurality of wheelposts of a turbine rotor, and a bucket attachment portion arranged to receive a plurality of non-metallic turbine buckets having single dovetail configuration root portions. The turbine system includes a turbine rotor wheel configured to receive metal buckets, at least one adapter secured to at least one wheelpost on the turbine rotor wheel, and at least one non-metallic bucket secured to the at least one adapter.

  19. Quantum Max-flow/Min-cut

    Energy Technology Data Exchange (ETDEWEB)

    Cui, Shawn X., E-mail: xingshan@math.ucsb.edu [Department of Mathematics, University of California, Santa Barbara, California 93106 (United States); Quantum Architectures and Computation Group, Microsoft Research, Redmond, Washington 98052 (United States); Freedman, Michael H., E-mail: michaelf@microsoft.com [Department of Mathematics, University of California, Santa Barbara, California 93106 (United States); Microsoft Research, Station Q, University of California, Santa Barbara, California 93106 (United States); Sattath, Or, E-mail: sattath@gmail.com [Computer Science Division, University of California, Berkeley, California 94720 (United States); Stong, Richard, E-mail: stong@ccrwest.org; Minton, Greg, E-mail: gtminto@ccrwest.org [Center for Communications Research, La Jolla, California 92121 (United States)

    2016-06-15

    The classical max-flow min-cut theorem describes transport through certain idealized classical networks. We consider the quantum analog for tensor networks. By associating an integral capacity to each edge and a tensor to each vertex in a flow network, we can also interpret it as a tensor network and, more specifically, as a linear map from the input space to the output space. The quantum max-flow is defined to be the maximal rank of this linear map over all choices of tensors. The quantum min-cut is defined to be the minimum product of the capacities of edges over all cuts of the tensor network. We show that unlike the classical case, the quantum max-flow=min-cut conjecture is not true in general. Under certain conditions, e.g., when the capacity on each edge is some power of a fixed integer, the quantum max-flow is proved to equal the quantum min-cut. However, concrete examples are also provided where the equality does not hold. We also found connections of quantum max-flow/min-cut with entropy of entanglement and the quantum satisfiability problem. We speculate that the phenomena revealed may be of interest both in spin systems in condensed matter and in quantum gravity.

  20. Quantum Max-flow/Min-cut

    Science.gov (United States)

    Cui, Shawn X.; Freedman, Michael H.; Sattath, Or; Stong, Richard; Minton, Greg

    2016-06-01

    The classical max-flow min-cut theorem describes transport through certain idealized classical networks. We consider the quantum analog for tensor networks. By associating an integral capacity to each edge and a tensor to each vertex in a flow network, we can also interpret it as a tensor network and, more specifically, as a linear map from the input space to the output space. The quantum max-flow is defined to be the maximal rank of this linear map over all choices of tensors. The quantum min-cut is defined to be the minimum product of the capacities of edges over all cuts of the tensor network. We show that unlike the classical case, the quantum max-flow=min-cut conjecture is not true in general. Under certain conditions, e.g., when the capacity on each edge is some power of a fixed integer, the quantum max-flow is proved to equal the quantum min-cut. However, concrete examples are also provided where the equality does not hold. We also found connections of quantum max-flow/min-cut with entropy of entanglement and the quantum satisfiability problem. We speculate that the phenomena revealed may be of interest both in spin systems in condensed matter and in quantum gravity.

  1. HIGH EFFICIENCY TURBINE

    OpenAIRE

    VARMA, VIJAYA KRUSHNA

    2012-01-01

    Varma designed ultra modern and high efficiency turbines which can use gas, steam or fuels as feed to produce electricity or mechanical work for wide range of usages and applications in industries or at work sites. Varma turbine engines can be used in all types of vehicles. These turbines can also be used in aircraft, ships, battle tanks, dredgers, mining equipment, earth moving machines etc, Salient features of Varma Turbines. 1. Varma turbines are simple in design, easy to manufac...

  2. Turbine maintenance and modernization

    Energy Technology Data Exchange (ETDEWEB)

    Unga, E. [Teollisuuden Voima Oy, Olkiluoto (Finland)

    1998-12-31

    The disturbance-free operation of the turbine plant plays an important role in reaching good production results. In the turbine maintenance of the Olkiluoto nuclear power plant the lifetime and efficiency of turbine components and the lifetime costs are taken into account in determining the turbine maintenance and modernization/improvement program. The turbine maintenance program and improvement/modernization measures taken in the plant units are described in this presentation. (orig.)

  3. Turbine maintenance and modernization

    Energy Technology Data Exchange (ETDEWEB)

    Unga, E [Teollisuuden Voima Oy, Olkiluoto (Finland)

    1999-12-31

    The disturbance-free operation of the turbine plant plays an important role in reaching good production results. In the turbine maintenance of the Olkiluoto nuclear power plant the lifetime and efficiency of turbine components and the lifetime costs are taken into account in determining the turbine maintenance and modernization/improvement program. The turbine maintenance program and improvement/modernization measures taken in the plant units are described in this presentation. (orig.)

  4. FLECH PowerMax Service Requirement Specification

    DEFF Research Database (Denmark)

    It is expected that in the future, ancillary services will be required at distribution level. This work describes how one of these ancillary services, the PowerMax service, must be spec ified within a market framework. The basis of this work is the Flexibility Clearing House (FLE CH) platform...... and the Distribution System Operator (DSO) services defined in [1]. The PowerMax service has been further discussed in [2], and this technical report seeks to clarify the implementation details first discussed in that paper. The aim of the PowerMax service it to relieve congestion issue s in the distribution system...... by establishing a maximum power that a cluster of consumer devices may draw from the syste m. The consumers will receive a payment for providing this service, and the DSO will be able to postpone grid reinfo rcement...

  5. WiMAX network performance monitoring & optimization

    DEFF Research Database (Denmark)

    Zhang, Qi; Dam, H

    2008-01-01

    frequency reuse, capacity planning, proper network dimensioning, multi-class data services and so on. Furthermore, as a small operator we also want to reduce the demand for sophisticated technicians and man labour hours. To meet these critical demands, we design a generic integrated network performance......In this paper we present our WiMAX (worldwide interoperability for microwave access) network performance monitoring and optimization solution. As a new and small WiMAX network operator, there are many demanding issues that we have to deal with, such as limited available frequency resource, tight...... this integrated network performance monitoring and optimization system in our WiMAX networks. This integrated monitoring and optimization system has such good flexibility and scalability that individual function component can be used by other operators with special needs and more advanced function components can...

  6. L’essai littéraire, devant le temps

    Directory of Open Access Journals (Sweden)

    Marielle Macé

    2008-02-01

    Full Text Available Le style de vérité accessible à l’essai est perceptible dans son mode de circulation, les souvenirs que l’on en garde, la façon dont on le résume, bref, l’usage que l’on en fait. Ce mémorable de l’essai tient à une pratique généralisée de la citation ; les essayistes partent de formes « citables », comme d’autant de pensées héritées et de savoirs doxaux ou paradoxaux qu’ils exploitent, développent ou fragilisent ; et ils en produisent à leur tour, offrant non pas des modèles applicables mais des cas remobilisables, des pensées désormais disponibles. Cette disponibilité identifie une pratique intellectuelle, les objets qu’elle fait naître (cette forme sensible que prennent dans un essai les opérations de l’esprit, un rythme propre à toute individualité pensante, bref une façon qu’a la prose d’idées de se situer devant le temps. Elle explique aussi la colère suscitée dans le monde du savoir contemporain par un genre profondément temporel, c’est-à-dire rythmé, situé, mais aussi précaire et soupçonnable à cet égard d’anachronisme.Lo stile di verità accessibile al saggio è percettibile nel modo in cui il testo circola, nei ricordi che ne abbiamo, nella maniera in cui ne facciamo riassunto, cioè nell’uso che possiamo averne. Questo aspetto “memorabile” del saggio è legato ad una prattica generalizzata della citazione. I saggisti partono di forme “citabili”, pensieri ereditati, saperi comuni o paradossali che loro mettono a prova, sviluppano, o fragilizzano; e ne producono a sua volta, non per offrire modelli da applicare, ma casi da mobilizzare, pensieri ormai disponibili. Questà disponibilità definisce una pratica intellettuale, gli oggetti che essa fa nascere (questa forma sensibile che prendono nel saggio le operazioni mentali, un ritmo legato ad ogni individualità nell’atto di pensare, un modo di porsi davanti al tempo. Spiega anche l’irritazione suscitata nel

  7. Autodesk 3ds Max 2013 essentials

    CERN Document Server

    Derakhshani, Dariush

    2012-01-01

    A four-color, task-based Autodesk Official Training Guide covering the core features of 3ds Max Beginning users of this popular 3D animation and effects software will find everything they need for a thorough understanding of the software's key features and functions in this colorful guide. The authors break down the complexities of learning 3D software and get you going right away with interesting, job-related projects. You'll learn the basics of modeling, texturing, animating, lighting, visualization, and visual effects with 3ds Max, exploring the methods and why they are used as they are.

  8. Autodesk 3ds Max 2012 Essentials

    CERN Document Server

    Derakhshani, Randi L

    2011-01-01

    Get a jump-start on Autodesk 3ds Max 2012 essentials-with the Essentials! The new Essentials books from Sybex are beautiful, task-based, full-color Autodesk Official Training Guides that help you get up to speed on Autodesk topics quickly and easily. Autodesk 3ds Max 2012 Essentials thoroughly covers the fundamentals of this popular 3D animation effects, and visualization software, teaching you what you need to become quickly productive. By following the book's clear explanations, practical tutorials, and step-by-step exercises, you'll cover all the bases. Topics include modeling, animation,

  9. Autodesk 3ds Max 2014 bible

    CERN Document Server

    Murdock, Kelly L

    2013-01-01

    A complete reference covering the newest version of 3ds Max software Autodesk 3ds Max is the popular 3D modeling, animation, rendering, and compositing software preferred by game developers and graphic designers in film and television. This comprehensive reference not only introduces beginners to this pricey and complex software, but also serves as a reference for experienced users. Packed with expert advice from popular author Kelly Murdock, it begins with a Quick Start tutorial to get you up and running, then continues with more than 150 step-by-step tutorials, advanced coverage, and plenty

  10. EVALUASI KESEPADANAN MUTU GIZI TEMPE KEDELAI PANGAN REKAYASA GENETIK (PRG DAN NON-PRG SERTA DAMPAK KONSUMSINYA PADA TIKUS PERCOBAAN

    Directory of Open Access Journals (Sweden)

    Dadi Hidayat Maskar

    2016-04-01

    Full Text Available ABSTRACTThis study was conducted to evaluate the effect of tempe that were made from Genetically Modified (GM and non-GM soybean on protein quality, malondialdehide (MDA levels, intracellular antioxidant superoxide dismutase (SOD activity in the liver and kidneys, as well as spermatozoa profile of experimental rats. Fourty five Sprague Dawley rats divided into eight treatment grups and one control, fed with tempe and soybean from GM and non-GM at 10% and 20% concentrations for 90 days. The results showed that there was no significant difference in term of protein quality, tempe made from GM soybean is substantially equivalent with tempe made from non-GM soybean. Results showed that group which was given ration of 10% protein from conventional soybean had lower liver and kidney MDA levels as compared to GM tempe 10% and 20% groups, but was not significant compared to conventional soybean 20% and casein 10% groups. While the value of liver and kidney SOD activity were not significantly different (p>0.05 between the groups of rats. There was no significant differences among the spermatozoa profiles treatment groups and control and they were within normal condition. Results of protein quality, MDA, SOD, and spermatozoa profile showed that tempe made from GM soybean was substantially equivalent with the non-GM soybean.Keywords: GM soybean, MDA, non-GM tempe, SOD, spermatozoa profileABSTRAKTujuan penelitian ini adalah untuk mengevaluasi pengaruh tempe Pangan Rekayasa Genetik (PRG dan non-PRG meliputi kualitas protein, kadar malondialdehida (MDA hati dan ginjal, aktivitas superoksida dismutase (SOD hati dan ginjal, dan profil spermatozoa pada tikus percobaan. Sebanyak 45 tikus terbagi ke dalam delapan perlakuan dan satu kontrol yang diberikan perlakuan dengan ransum tempe dan kedelai, baik PRG maupun non-PRG, dengan konsentrasi 10% dan 20% selama 90 hari. Hasil percobaan menunjukkan bahwa tidak ada perbedaan yang signifikan dalam kualitas protein

  11. Steam turbine cycle

    International Nuclear Information System (INIS)

    Okuzumi, Naoaki.

    1994-01-01

    In a steam turbine cycle, steams exhausted from the turbine are extracted, and they are connected to a steam sucking pipe of a steam injector, and a discharge pipe of the steam injector is connected to an inlet of a water turbine. High pressure discharge water is obtained from low pressure steams by utilizing a pressurizing performance of the steam injector and the water turbine is rotated by the high pressure water to generate electric power. This recover and reutilize discharged heat of the steam turbine effectively, thereby enabling to improve heat efficiency of the steam turbine cycle. (T.M.)

  12. The swirl turbine

    Science.gov (United States)

    Haluza, M.; Pochylý, F.; Rudolf, P.

    2012-11-01

    In the article is introduced the new type of the turbine - swirl turbine. This turbine is based on opposite principle than Kaplan turbine. Euler equation is satisfied in the form gHηh = -u2vu2. From this equation is seen, that inflow of liquid into the runner is without rotation and on the outflow is a rotation of liquid opposite of rotation of runner. This turbine is suitable for small head and large discharge. Some constructional variants of this turbine are introduced in the article and theoretical aspects regarding losses in the draft tube. The theory is followed by computational simulations in Fluent and experiments using laser Doppler anemometry.

  13. The Statue of Liberty Peter Max Style!

    Science.gov (United States)

    Cunningham, Kathy

    2012-01-01

    The author's school is only 30 minutes from New York City, so every year when second-graders study towns and cities, the students do a project based on New York City landmarks. This year was the Statue of Liberty. The author introduced Peter Max's famous Pop art to her students, and explained that, as the art world kept changing, artists decided…

  14. Max Roach's Adventures in Higher Music Education.

    Science.gov (United States)

    Hentoff, Nat

    1980-01-01

    Max Roach and the author discuss Roach's efforts to gain recognition of the complexity and importance of American musical forms, particularly jazz, by American university music departments. In addition, Roach describes his approach to marketing his music, an approach which avoids the economic exploitation often suffered by American jazz musicians.…

  15. Exact simulation of max-stable processes.

    Science.gov (United States)

    Dombry, Clément; Engelke, Sebastian; Oesting, Marco

    2016-06-01

    Max-stable processes play an important role as models for spatial extreme events. Their complex structure as the pointwise maximum over an infinite number of random functions makes their simulation difficult. Algorithms based on finite approximations are often inexact and computationally inefficient. We present a new algorithm for exact simulation of a max-stable process at a finite number of locations. It relies on the idea of simulating only the extremal functions, that is, those functions in the construction of a max-stable process that effectively contribute to the pointwise maximum. We further generalize the algorithm by Dieker & Mikosch (2015) for Brown-Resnick processes and use it for exact simulation via the spectral measure. We study the complexity of both algorithms, prove that our new approach via extremal functions is always more efficient, and provide closed-form expressions for their implementation that cover most popular models for max-stable processes and multivariate extreme value distributions. For simulation on dense grids, an adaptive design of the extremal function algorithm is proposed.

  16. Teaching Financial Literacy with Max and Ruby

    Science.gov (United States)

    Brown, Natalya; Ferguson, Kristen

    2017-01-01

    Teaching financial literacy is important at all stages of life, but is often neglected with elementary students. In this article, the authors describe a strategy for teaching financial literacy using the books about Max and Ruby by Rosemary Wells. These books can help introduce the five key concepts of financial literacy: scarcity, exchange,…

  17. On the spectrum in max algebra

    Czech Academy of Sciences Publication Activity Database

    Müller, Vladimír; Peperko, A.

    2015-01-01

    Roč. 485, November (2015), s. 250-266 ISSN 0024-3795 R&D Projects: GA ČR(CZ) GA14-07880S Institutional support: RVO:67985840 Keywords : non-negativ matrices * max algebra * eigenvalues Subject RIV: BA - General Mathematics Impact factor: 0.965, year: 2015 http://www.sciencedirect.com/science/article/pii/S0024379515004139

  18. Faults and ridges - Historical development in Tempe Terra and Ulysses Patera regions of Mars

    International Nuclear Information System (INIS)

    Scott, D.H.; Dohm, J.M.

    1990-01-01

    Tempe Terra and the area north of Ulysses Patera are selected to demonstrate the various stages of faulting and ridge development in local areas. This work is accomplished by using Viking photomosaics to determine crosscutting relations of structures as well as their morphology and trend orientations. Results show that from the Early Noachian through the Early Amazonian Epochs, at least eight episodes of faulting occurred at Tempe Terra and six at Ulysses Patera. Tectonic activity at Tempe Terra was expressed mainly by densely spaced faults along the northeast extension of the Tharsis rise; faulting culminated in the Middle and Late Noachian and was superseded by transverse fault systems from the Alba Patera region during the Hesperian. Ridge formation, however, was most active in the Early Hesperian. At Ulysses Patera, an early history of tectonism is recorded by complex arrays of faults in a relatively small area of Noachian rocks. 14 refs

  19. POTENSI HIDROLISAT TEMPE SEBAGAI PENYEDAP RASA MELALUI PEMANFAATAN EKSTRAK BUAH NANAS

    Directory of Open Access Journals (Sweden)

    Achmad Machin

    2012-09-01

    Full Text Available Penelitian bertujuan untuk mendeskripsikan perlunya pengembangan penyedap rasa alternatif berbahan hidrolisat tempe dan proses pembuatannya, menguji jenis asam amino, kadar protein dan uji organoleptik. Metode eksperimen digunakan pada penelitian ini. Pengujian jenis asam amino melalui teknik kromatografi, kadar protein terlarut melalui metode Biuret dan uji organoleptik produk dibandingkan penyedap rasa sintetis. Hasil yang didapatkan adalah pengembangan penyedap rasa hidrolisat tempe perlu dilakukan karena alasan dampak mengkonsumsi penyedap rasa sintetis, pengembangan teknologi, sumber penghasilan dan potensi penelitian. Proses pembuatannya melalui penambahan sari nanas pada tempe yang telah dikukus dan diblender dengan perbandingan tempe:air:sari nanas 1: 0,5:0,5. Pengovenan selama 2 jam pada suhu 55ºC, penambahan dektrin + NaCl (masing-masing sebanyak 0,5 gr/100 gr tempe, pengovenan kembali selama 2 jam pada suhu 55ºC. Perlakuan B2 (pengovenan pada suhu 55ºC selama 2 jam menghasilkan asam glutamat. Produk ini berpotensi membentuk monosodium glutamat dengan penambahan NaCl. Jumlah protein terlarut dipengaruhi oleh lama pengovenan dan suhu. Produk hidrolisat tempe sebagai penyedap rasa menghasilkan rerata kesukaan warna (3,3 = menarik, aroma (3,9 = sangat suka dan menghasilkan cita rasa sama jika ditambahakan sebanyak 2 kali dibandingkan penyedap rasa sintetis.This research was aimed to describe the need for the development of alternative flavor made from hydrolyzated tempe and its manufacturing process, to test the types of amino acid, to measure the protein levels and to test the favor organoleptically. This was an experimental study. The types of amino acid was tested using chromatographic technique, the level of soluble protein was tested using Biuret method and the products were compared organoleptically. The study showed that the development of hydrolyzated tempe flavoring needs to be performed by the reason of the impact of

  20. ANALISIS KUANTITATIF ISOFLAVON TEMPE SECARA CEPAT DAN SEDERHANA MENGGUNAKAN METODE KROMATOGRAFI LAPIS TIPIS- DENSITOMETRI

    Directory of Open Access Journals (Sweden)

    Agustina Setiawati

    2014-05-01

    Full Text Available Abstract: Rapid and simple quantitative analysis isoflavones tempe using densitometric TLC has been done. The mobile phase of the system was chloroform: methanol: ethylacetate (45: 5: 0.75. Thin layer chromatography was performed on aluminium TLC plates.Ascending distance of 1 μL sample was performanced 10 cm. Then the plate was scanned at 261 nm. A linear relationship obtained at 0.08 - 2 μg/spot with r= 0.9986. The LOD and LOQ of isoflavone were 0.014 μg/spot and 0.048 μg/spot. Genistein contained in tempe was 0.151± 0.005 % b/b. Keywords: tempe, isoflavon, TLC

  1. TEMP-M program for thermal-hydraulic calculation of fast reactor fuel assemblies

    International Nuclear Information System (INIS)

    Bogoslovskaya, C.P.; Sorokin, A.P.; Tikhomirov, B.B.; Titov, P.A.; Ushakov, P.A.

    1983-01-01

    TEMP-M program (Fortran, BESM-6 computer) for thermal-hydraulic calculation of fast reactor fuel assemblies is described. Results of calculation of temperature field in a 127 fuel element assembly of BN-600, reactor accomplished according to TEMP-N program are considered as an example. Algorithm, realized in the program, enables to calculate the distributions of coolant heating, fuel element temperature (over perimeter and length) and assembly shell temperature. The distribution of coolant heating in assembly channels is determined from a solution of the balance equation system which accounts for interchannel exchange, nonadiabatic conditions on the assembly shell. The TEMP-M program gives necessary information for calculation of strength, seviceability of fast reactor core elements, serves an effective instrument for calculations when projecting reactor cores and analyzing thermal-hydraulic characteristics of operating reactor fuel assemblies

  2. Diversity of endophytic fungi in Glycine max.

    Science.gov (United States)

    Fernandes, Elio Gomes; Pereira, Olinto Liparini; da Silva, Cynthia Cânedo; Bento, Claudia Braga Pereira; de Queiroz, Marisa Vieira

    2015-12-01

    Endophytic fungi are microorganisms that live within plant tissues without causing disease during part of their life cycle. With the isolation and identification of these fungi, new species are being discovered, and ecological relationships with their hosts have also been studied. In Glycine max, limited studies have investigated the isolation and distribution of endophytic fungi throughout leaves and roots. The distribution of these fungi in various plant organs differs in diversity and abundance, even when analyzed using molecular techniques that can evaluate fungal communities in different parts of the plants, such as denaturing gradient gel electrophoresis (DGGE). Our results show there is greater species richness of culturable endophytic filamentous fungi in the leaves G. max as compared to roots. Additionally, the leaves had high values for diversity indices, i.e. Simpsons, Shannon and Equitability. Conversely, dominance index was higher in roots as compared to leaves. The fungi Ampelomyces sp., Cladosporium cladosporioides, Colletotrichum gloeosporioides, Diaporthe helianthi, Guignardia mangiferae and Phoma sp. were more frequently isolated from the leaves, whereas the fungi Fusarium oxysporum, Fusarium solani and Fusarium sp. were prevalent in the roots. However, by evaluating the two communities by DGGE, we concluded that the species richness was higher in the roots than in the leaves. UPGMA analysis showed consistent clustering of isolates; however, the fungus Leptospora rubella, which belongs to the order Dothideales, was grouped among species of the order Pleosporales. The presence of endophytic Fusarium species in G. max roots is unsurprising, since Fusarium spp. isolates have been previously described as endophyte in other reports. However, it remains to be determined whether the G. max Fusarium endophytes are latent pathogens or non-pathogenic forms that benefit the plant. This study provides a broader knowledge of the distribution of the fungal

  3. PCR approach for rapid detection of Escherichia coli in tempe using a specific primer

    Directory of Open Access Journals (Sweden)

    Siti Harnina Bintari

    2014-12-01

    Full Text Available Tempe known as a traditional fermented food originated from Indonesia. It has a unique flavour and texture. It also contains high protein and usually serves to substitute meat, fish, or egg as a complement to rice. The manufacture process of Tempe is quite complex and mostly, the traditional process has not employed the hygienic standard. In the process of Tempe making, there are two critical stages of the whole process; i.e. soaking of soybeans and solid state fermentation by Rhizopus sp. During the process, foodborne pathogen bacteria such as Escherichia coli could contaminate the product of Tempe. The bacterial contamination could be revealed through culture dependent methods which is costly, laborious, and time consuming. Therefore, the culture-independent method such as polymerase chain reaction using a specific primer could be applied to detect target microorganism to save time and labour. In this study, thirty-one Tempe samples collected from different manufacturers in Semarang, Central Java, Indonesia were analysed by PCR. In order to obtain the bacterial genomic DNA, a modified Chelex 100-Microwave method was employed. The results of DNA extraction showed that the method was an applicable method. It gave high quantity and quality of DNA; therefore, it could be applied in the PCR reaction. The DNA samples were employed in PCR for detection of Escherichia coli using Ecoli706F/R. It was found that 27 out of 31 samples were detected having Escherichia coli contamination showed by the presence of the amplified product size 706 bp. The application of this method could significantly reduce costs and time of analysis in the laboratory. Further response after E. coli were detected could be employed, including investigation of the critical factors in Tempe manufacturing process which allowed E. coli contamination.

  4. Performance Improvement Strategic Home Based Manufacturer Tahu And Tempe Groups Based In The District Of Jember

    Directory of Open Access Journals (Sweden)

    Istatuk Budi Yuswanto

    2017-04-01

    Full Text Available Tahu dan tempe is a product of the soybean meal that has been known since long in Indonesia. Tahu is a Chinese food products in contrast to tempe an authentic Indonesian food . As tempe tahu also favored by the people of Indonesia because it has a taste that delicious nutritious and affordable price.Industries that produce tahu dan tempe are generally small-scale home-based businesses with the number of workers a little less than 2-6 people and investments that are not too large. The use of technology in small business home-based producer of tahu dan tempe quite simple and easy to learn so it can be run by anyone. The success of small business home-based manufacturers to survive and evolve toward more advanced by knowing their strengths weaknesses opportunities that can be taken by small business home-based and threat or better known as the SWOT Strength Weakness Opportunity Threath that can be retrieved strategies that affect the success and development of small business home-based manufacturer of tahu dan tempe.Constraints faced by small businesses and home-based manufacturers know that the soybean Tepe that include budget constraints limited access to banking limited human resources marketing only the scope of Jember and lack of good management. No group or cooperative does not have a good recording making it difficult to make financial reports manufacturing planning and operational supervision and finances into this industry employers group lemah.Pembentukan help solve problems and maximize its potential.

  5. Temps et espace de l'antiquité à nos jours

    CERN Document Server

    Rovelli, Carlo

    2007-01-01

    Des visions du cosmos dans la Grèce ancienne aux théories récentes sur la gravité quantique, Carlo Rovelli explore les métamorphoses de la notion d'espace et de temps. Une approche lumineuse de l'histoire des sciences par le biais de ces "coordonnées fondamentales de notre description du monde". Au terme de ce voyage, qui fait la part belle aux recherches actuelles, se dessine un Univers fascinant fait de " grains d'espace", où le temps pourrait n'être qu'un effet de notre ignorance des lois du monde.

  6. Aerodynamics of Wind Turbines

    DEFF Research Database (Denmark)

    Hansen, Martin Otto Laver

    Aerodynamics of Wind Turbines is the established essential text for the fundamental solutions to efficient wind turbine design. Now in its second edition, it has been entirely updated and substantially extended to reflect advances in technology, research into rotor aerodynamics and the structural...... response of the wind turbine structure. Topics covered include increasing mass flow through the turbine, performance at low and high wind speeds, assessment of the extreme conditions under which the turbine will perform and the theory for calculating the lifetime of the turbine. The classical Blade Element...... Momentum method is also covered, as are eigenmodes and the dynamic behavior of a turbine. The new material includes a description of the effects of the dynamics and how this can be modeled in an aeroelastic code, which is widely used in the design and verification of modern wind turbines. Further...

  7. Aerodynamics of wind turbines

    DEFF Research Database (Denmark)

    Hansen, Martin Otto Laver

    Aerodynamics of Wind Turbines is the established essential text for the fundamental solutions to efficient wind turbine design. Now in its third edition, it has been substantially updated with respect to structural dynamics and control. The new control chapter now includes details on how to design...... Turbines (VAWT). Topics covered include increasing mass flow through the turbine, performance at low and high wind speeds, assessment of the extreme conditions under which the turbine will perform and the theory for calculating the lifetime of the turbine. The classical Blade Element Momentum method...... is also covered, as are eigenmodes and the dynamic behaviour of a turbine. The book describes the effects of the dynamics and how this can be modelled in an aeroelastic code, which is widely used in the design and verification of modern wind turbines. Furthermore, it examines how to calculate...

  8. TurbinAID

    International Nuclear Information System (INIS)

    Moradian, M.A.; Chow, M.P.; Osborne, R.L.; Jenkins, M.A.

    1991-01-01

    The Westinghouse Turbine Artificial Intelligence Diagnostics system or TurbinAID, can diagnose both thermodynamic and mechanical component anomalies within the turbine, and around the turbine cycle. any monitoring system can detect that a variable is in an abnormal state, but TurbinAID can also indicate the cause, and provide recommended corrective action(s). The TurbinAID Expert Systems utilize multiple sensor and variable inputs, and their interdependencies in the generation of a diagnosis. The system performs sensor validation as part of the data acquisition scheme. The TurbinAID system has been in operation for several years. This paper describes the monitoring and diagnostic functions provided by TurbinAID, and how the utility industry both nuclear and fossil, can utilize the system to enhance unit operation

  9. Turbulence and wind turbines

    DEFF Research Database (Denmark)

    Brand, Arno J.; Peinke, Joachim; Mann, Jakob

    2011-01-01

    The nature of turbulent flow towards, near and behind a wind turbine, the effect of turbulence on the electricity production and the mechanical loading of individual and clustered wind turbines, and some future issues are discussed.......The nature of turbulent flow towards, near and behind a wind turbine, the effect of turbulence on the electricity production and the mechanical loading of individual and clustered wind turbines, and some future issues are discussed....

  10. Bioactivity of tempe by inhibiting adhesion of ETEC to intestinal cells, as influenced by fermentation substrates and starter pure cultures

    NARCIS (Netherlands)

    Roubos-van den Hil, P.J.; Nout, M.J.R.; Meulen, van der J.; Gruppen, H.

    2010-01-01

    Soya bean tempe is known for its bioactivity in reducing the severity of diarrhoea in piglets. This bioactivity is caused by an inhibition of the adhesion of enterotoxigenic Escherichia coli (ETEC) to intestinal cells. In this paper, we assessed the bioactive effect of soya tempe on a range of ETEC

  11. Sliding vane geometry turbines

    Science.gov (United States)

    Sun, Harold Huimin; Zhang, Jizhong; Hu, Liangjun; Hanna, Dave R

    2014-12-30

    Various systems and methods are described for a variable geometry turbine. In one example, a turbine nozzle comprises a central axis and a nozzle vane. The nozzle vane includes a stationary vane and a sliding vane. The sliding vane is positioned to slide in a direction substantially tangent to an inner circumference of the turbine nozzle and in contact with the stationary vane.

  12. A short period undulator for MAX

    International Nuclear Information System (INIS)

    Ahola, H.; Meinander, T.

    1992-01-01

    A hybrid undulator for generation of high brilliance synchrotron radiation in the photon energy range of 60--600 eV at the 550 MeV electron storage ring MAX in Lund, Sweden has been designed and built at the Technical Research Centre of Finland in close collaboration with MAX-lab of Lund University. At the rather modest electron energy of MAX this photon energy range can be reached only by an undulator featuring a fairly short period and the smallest possible magnetic gap. Even then, higher harmonics (up to the 13th) of the radiation spectrum must be utilized. An optimization of the magnetic design resulted in a hybrid configuration of NdFeB magnets and soft iron poles with a period of 24 mm and a minimum magnetic gap of 7--10 mm. A variable-gap vacuum chamber allows reduction of the vacuum gap from a maximum of 20 mm, needed for injection, down to 6 mm during stored beam operation. A special design of this chamber permits a magnetic gap between pole tips that is only 1 mm larger than the vacuum gap. Adequate field uniformity was ensured by calibration of magnets to equal strength at their true operating point and verification of the homogeneity of their magnetization. Magnetic measurements included Hall probe scans of the undulator field and flip coil evaluations of the field integral

  13. Perancangan Sistem Pengelolaan Limbah Cair Industri Tempe di Desa Bandungrejo –Kecamatan Mranggen – Kab. Demak

    Directory of Open Access Journals (Sweden)

    Tri Joko

    2015-12-01

    Full Text Available ABSTRACT Background : Problems  which often appear in small industrial environment especially from the central industry of tempe is lack of awareness of society in management of the environment It is associated with the limited fund to build waste water facility and also its operating expenses. The Central Industry of tempe in Bandungrejo District of Mranggen at this time. The amount of  is 26 home industries of tempe product are marketed to the region of Demak and its surroundings, amount to and also to region part of east town of Semarang. For the efficacy of product of tempe,  waste also generate problem especially related to contamination of ground water, decrease quality of wells, dig water  as the source of clean. Method : To overcome the mentioned hence, it requires a cheap waste water treatment system design, easy to operate and also with  economized  energy. Result : As conclusion of this research is that source of waste water of tempe industry comes from washing process, poaching of seed process, soaking and resolving of soy husk and seed process, debit/capacities waste water of tempe mean equal to 1,27 m3/day/industry, waste water characteristic of tempe Industry  has the character of organic with comparison of BOD/COD = 0,4 - 0,5, the proposed of IPAL design is by using batch system through anaerobic system with usage of PVC pipe media of wasp den at biofilter process. Suggested from results of this research are the importance of giving knowledge to society of central industry of tempe about tere impacts  to the  environment by activity making of tempe and also the importance of forming and stabilization of organization management of industrial waste water so that reaching of continuity of operation and maintenance of WWTP (Waste Water Treatment Plan.   Key words : anaerobic biofilter, industrial  waste water of tempe

  14. Fermented soya bean (tempe) extracts reduce adhesion of enterotoxigenic Escherichia coli to intestinal epithelial cells

    NARCIS (Netherlands)

    Roubos-van den Hil, P.J.; Nout, M.J.R.; Beumer, R.R.; Meulen, van der J.; Zwietering, M.H.

    2009-01-01

    Aims: This study aimed to investigate the effect of processed soya bean, during the successive stages of tempe fermentation and different fermentation times, on adhesion of enterotoxigenic Escherichia coli (ETEC) K88 to intestinal brush border cells as well as Caco-2 intestinal epithelial cells; and

  15. FACTORS CONTRIBUTING TO FACULTY AND STUDENT ACCEPTANCE OF INSTRUCTIONAL TELEVISION, TEMP II.

    Science.gov (United States)

    SANFORD, FILLMORE H.

    PERTINENT FACTORS WERE DELINEATED IN THE ACCEPTANCE OR REJECTION OF TELEVISED INSTRUCTIONAL PROGRAMS USED WITH THE TEXAS EDUCATIONAL MICROWAVE PROJECT (TEMP)--AN EFFORT LINKING 11 COLLEGES AND UNIVERSITIES BY MICROWAVE TRANSMITTERS TO PROVIDE AN INTEGRATED CLOSED-CIRCUIT TELEVISION SYSTEM. DATA-GATHERING INSTRUMENTS WERE INTERVIEWS,…

  16. Il est temps que le Canada rende la justice accessible à tous | CRDI ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    école ou qu'on exclut une personne d'un hôpital, les médias ne perdent pas de temps à exposer l'injustice. La privation de soins de santé ou de scolarisation est impensable pour la plupart des Canadiens; pourtant, l'accès à ...

  17. The Structure of the Temp Wage Gap in Slack Labor Markets

    DEFF Research Database (Denmark)

    Jahn, Elke

    As a consequence of the rapid growth of temporary agency employment in Germa-ny the debate on the remuneration of temporary agency workers has intensified recently. The study finds that the temp wage gap in Germany is indeed large. Decomposition reveals that the gap is mainly driven by difference...

  18. Turbine Imaging Technology Assessment

    Energy Technology Data Exchange (ETDEWEB)

    Moursund, Russell A.; Carlson, Thomas J.

    2004-12-31

    The goal of this project was to identify and evaluate imaging alternatives for observing the behavior of juvenile fish within an operating Kaplan turbine unit with a focus on methods to quantify fish injury mechanisms inside an operating turbine unit. Imaging methods are particularly needed to observe the approach and interaction of fish with turbine structural elements. This evaluation documents both the opportunities and constraints for observing juvenile fish at specific locations during turbine passage. The information may be used to acquire the scientific knowledge to make structural improvements and create opportunities for industry to modify turbines and improve fish passage conditions.

  19. Turbine related fish mortality

    International Nuclear Information System (INIS)

    Eicher, G.J.

    1993-01-01

    A literature review was conducted to assess the factors affecting turbine-related fish mortality. The mechanics of fish passage through a turbine is outlined, and various turbine related stresses are described, including pressure and shear effects, hydraulic head, turbine efficiency, and tailwater level. The methodologies used in determining the effects of fish passage are evaluated. The necessity of adequate controls in each test is noted. It is concluded that mortality is the result of several factors such as hardiness of study fish, fish size, concentrations of dissolved gases, and amounts of cavitation. Comparisons between Francis and Kaplan turbines indicate little difference in percent mortality. 27 refs., 5 figs

  20. Turbine Imaging Technology Assessment

    International Nuclear Information System (INIS)

    Moursund, Russell A.; Carlson, Thomas J.

    2004-01-01

    The goal of this project was to identify and evaluate imaging alternatives for observing the behavior of juvenile fish within an operating Kaplan turbine unit with a focus on methods to quantify fish injury mechanisms inside an operating turbine unit. Imaging methods are particularly needed to observe the approach and interaction of fish with turbine structural elements. This evaluation documents both the opportunities and constraints for observing juvenile fish at specific locations during turbine passage. The information may be used to acquire the scientific knowledge to make structural improvements and create opportunities for industry to modify turbines and improve fish passage conditions

  1. Medicaid Analytic eXtract (MAX) General Information

    Data.gov (United States)

    U.S. Department of Health & Human Services — The Medicaid Analytic eXtract (MAX) data is a set of person-level data files on Medicaid eligibility, service utilization, and payments. The MAX data are created to...

  2. Micro-turbines

    International Nuclear Information System (INIS)

    Tashevski, Done

    2003-01-01

    In this paper a principle of micro-turbines operation, type of micro-turbines and their characteristics is presented. It is shown their usage in cogeneration and three generation application with the characteristics, the influence of more factors on micro-turbines operation as well as the possibility for application in Macedonia. The paper is result of the author's participation in the training program 'Micro-turbine technology' in Florida, USA. The characteristics of different types micro-turbines by several world producers are shown, with accent on US micro-turbines producers (Capstone, Elliott). By using the gathered Author's knowledge, contacts and the previous knowledge, conclusions and recommendations for implementation of micro-turbines in Macedonia are given. (Author)

  3. Productive Liquid Fertilizer from Liquid Waste Tempe Industry as Revealed by Various EM4 Concentration

    Science.gov (United States)

    Hartini, S.; Letsoin, F.; Kristijanto, A. I.

    2018-04-01

    Recently, using of productive liquid fertilizer assumed as a proper and practical fertilizer for plant productivity purposes. Various ways of enrichment of liquid fertilizer were done to achieve certain quality. The purpose of this research was to determine the proper additional formulation in the process of making productive liquid fertilizer based on the various concentration of EM4 as well as comparated the result with SNI. Liquid tempe waste were collected from some tempe industries at Sidorejo Kidul village, Tingkir district, Salatiga. The concentration of EM4 which were added to the tempe wastewater are 0%; 0.20%; 0.40%; 0.60%; 0.80%; 1.00% respectively. The pH, temperature, C total, N total, C/N ratio, and PO4 3- were measured. Data was analyzed by using Randomize Completely Block Design (RCBD) with 6 treatments and 4 replications. Comparison between the average, the Honestly Significance Deference (HSD) 5% was used. The results showed that the addition of EM4 indicated there were a significant progress. Moreover, the most effective formula to increase the quality of productive liquid fertilizer from liquid waste tempe was found in addition of 1.00% EM4 with the gained analysis value for the C total, N total, C/N ratio, and degree of PO4 3- as follows : 4.395 ± 1.034%; 1.470 ± 0.081%; 3.01 ± 0.756; 685.28 ± 70.44 ppm . Associated with the need fulfillment of SNI hence can be concluded that result of Productive Liquid Fertilizer (PLF) from liquid waste tempe successfully fulfill SNI of liquid fertilizer for pH parameter and total N, only.

  4. Neutron Damage and MAX Phase Ternary Compounds

    Energy Technology Data Exchange (ETDEWEB)

    Barsoum, Michael [Drexel Univ., Philadelphia, PA (United States); Hoffman, Elizabeth [Savannah River Site (SRS), Aiken, SC (United States). Savannah River National Lab. (SRNL); Sindelar, Robert [Savannah River Site (SRS), Aiken, SC (United States). Savannah River National Lab. (SRNL); Garcua-Duaz, Brenda [Savannah River Site (SRS), Aiken, SC (United States). Savannah River National Lab. (SRNL); Kohse, Gordon [Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)

    2014-06-17

    The Demands of Gen IV nuclear power plants for long service life under neutron radiation at high temperature are severe. Advanced materials that would withstand high temperatures (up to 1000+ C) to high doses in a neutron field would be ideal for reactor internal structures and would add to the long service life and reliability of the reactors. The objective of this work is to investigate the response of a new class of machinable, conductive, layered, ternary transition metal carbides and nitrides - the so-called MAX phases - to low and moderate neutron dose levels.

  5. Neutron Damage and MAX Phase Ternary Compounds

    International Nuclear Information System (INIS)

    Barsoum, Michael; Hoffman, Elizabeth; Sindelar, Robert; Garcua-Diaz, Brenda; Kohse, Gordon

    2014-01-01

    The Demands of Gen IV nuclear power plants for long service life under neutron radiation at high temperature are severe. Advanced materials that would withstand high temperatures (up to 1000+ C) to high doses in a neutron field would be ideal for reactor internal structures and would add to the long service life and reliability of the reactors. The objective of this work is to investigate the response of a new class of machinable, conductive, layered, ternary transition metal carbides and nitrides - the so-called MAX phases - to low and moderate neutron dose levels.

  6. Max Raphael, dialectics and Greek art

    OpenAIRE

    Healy, P.

    2007-01-01

    The article outlines what is required for a theory of art in the late work of Max Raphael, by showing that it is a response to a problematic first formulated, but left unanswered, by Marx, and which can be seen as developed by Raphael in his writing, especially the text he devoted to a dialectic interpretation of Greek art, with special reference to temple architecture. In detailing this latter study it is possible to see how Raphael’s understanding and analysis is guided by his account of an...

  7. Max Raphael: Dialectics and Greek Art

    Directory of Open Access Journals (Sweden)

    Patrick Healy

    2014-07-01

    Full Text Available The article outlines what is required for a theory of art in the late work of Max Raphael, by showing that it is a response to a problematic first formulated, but left unanswered, by Marx, and which can be seen as developed by Raphael in his writing, especially the text he devoted to a dialectic interpretation of Greek art, with special reference to temple architecture. In detailing this latter study it is possible to see how Raphael’s understanding and analysis is guided by his account of an empirical theory of art, and contributes to its further elaboration.

  8. Wind turbine operated sailboat

    Energy Technology Data Exchange (ETDEWEB)

    Hall, R.

    1990-07-31

    A wind powered boat is disclosed which incorporates a vertical axis rotary turbine. A shaft portion extends downwardly from the turbine to a water pump, with the boat being provided with a forwardly opening inlet and a rearwardly opening outlet from the water pump. When rotating, the turbine operates the pump by the shaft to draw in water through the inlet, thereby creating a low pressure area in front of the boat, and to force the water out through the outlet for propelling the boat. In a preferred embodiment, the boat has a catamaran construction or is a large ocean going vessel with enough width to provide a buffer to either side of the turbine, and the turbine is the Darrieus rotor type. The pump is a standard centrifugal type of pump. A self adjusting braking device for the turbine is also disclosed, which prevents over-rotation and is also capable of storing heat energy generated during braking. 4 figs.

  9. The swirl turbine

    International Nuclear Information System (INIS)

    Haluza, M; Pochylý, F; Rudolf, P

    2012-01-01

    In the article is introduced the new type of the turbine - swirl turbine. This turbine is based on opposite principle than Kaplan turbine. Euler equation is satisfied in the form gHη h = −u 2 v u2 . From this equation is seen, that inflow of liquid into the runner is without rotation and on the outflow is a rotation of liquid opposite of rotation of runner. This turbine is suitable for small head and large discharge. Some constructional variants of this turbine are introduced in the article and theoretical aspects regarding losses in the draft tube. The theory is followed by computational simulations in Fluent and experiments using laser Doppler anemometry.

  10. Wind Turbines Wake Aerodynamics

    DEFF Research Database (Denmark)

    Vermeer, L.; Sørensen, Jens Nørkær; Crespo, A.

    2003-01-01

    The aerodynamics of horizontal axis wind turbine wakes is studied. The contents is directed towards the physics of power extraction by wind turbines and reviews both the near and the far wake region. For the near wake, the survey is restricted to uniform, steady and parallel flow conditions......, thereby excluding wind shear, wind speed and rotor setting changes and yawed conditions. The emphasis is put on measurements in controlled conditions.For the far wake, the survey focusses on both single turbines and wind farm effects, and the experimental and numerical work are reviewed; the main interest...... is to study how the far wake decays downstream, in order to estimate the effect produced in downstream turbines.The article is further restricted to horizontal axis wind turbines and excludes all other types of turbines....

  11. Superconducting Wind Turbine Generators

    Directory of Open Access Journals (Sweden)

    Yunying Pan

    2016-08-01

    Full Text Available Wind energy is well known as a renewable energy because its clean and less polluted characteristic, which is the foundation of development modern wind electricity. To find more efficient wind turbine is the focus of scientists around the world. Compared from conventional wind turbines, superconducting wind turbine generators have advantages at zero resistance, smaller size and lighter weight. Superconducting wind turbine will inevitably become the main trends in this area. This paper intends to introduce the basic concept and principle of superconductivity, and compare form traditional wind turbine to obtain superiority, then to summary three proposed machine concept.While superconductivity have difficulty  in modern technology and we also have proposed some challenges in achieving superconducting wind turbine finally.

  12. Multivariate Max-Stable Spatial Processes

    KAUST Repository

    Genton, Marc G.

    2014-01-06

    Analysis of spatial extremes is currently based on univariate processes. Max-stable processes allow the spatial dependence of extremes to be modelled and explicitly quantified, they are therefore widely adopted in applications. For a better understanding of extreme events of real processes, such as environmental phenomena, it may be useful to study several spatial variables simultaneously. To this end, we extend some theoretical results and applications of max-stable processes to the multivariate setting to analyze extreme events of several variables observed across space. In particular, we study the maxima of independent replicates of multivariate processes, both in the Gaussian and Student-t cases. Then, we define a Poisson process construction in the multivariate setting and introduce multivariate versions of the Smith Gaussian extremevalue, the Schlather extremal-Gaussian and extremal-t, and the BrownResnick models. Inferential aspects of those models based on composite likelihoods are developed. We present results of various Monte Carlo simulations and of an application to a dataset of summer daily temperature maxima and minima in Oklahoma, U.S.A., highlighting the utility of working with multivariate models in contrast to the univariate case. Based on joint work with Simone Padoan and Huiyan Sang.

  13. Multivariate Max-Stable Spatial Processes

    KAUST Repository

    Genton, Marc G.

    2014-01-01

    Analysis of spatial extremes is currently based on univariate processes. Max-stable processes allow the spatial dependence of extremes to be modelled and explicitly quantified, they are therefore widely adopted in applications. For a better understanding of extreme events of real processes, such as environmental phenomena, it may be useful to study several spatial variables simultaneously. To this end, we extend some theoretical results and applications of max-stable processes to the multivariate setting to analyze extreme events of several variables observed across space. In particular, we study the maxima of independent replicates of multivariate processes, both in the Gaussian and Student-t cases. Then, we define a Poisson process construction in the multivariate setting and introduce multivariate versions of the Smith Gaussian extremevalue, the Schlather extremal-Gaussian and extremal-t, and the BrownResnick models. Inferential aspects of those models based on composite likelihoods are developed. We present results of various Monte Carlo simulations and of an application to a dataset of summer daily temperature maxima and minima in Oklahoma, U.S.A., highlighting the utility of working with multivariate models in contrast to the univariate case. Based on joint work with Simone Padoan and Huiyan Sang.

  14. Flow in Pelton turbines

    OpenAIRE

    Furnes, Kjartan

    2013-01-01

    The flow in Pelton turbines is subsonic, turbulent, multiphase (water, air, and water vapor from cavitation), has high speeds, sharp gradients, free surface and dynamic boundary conditions. A static grid is unsuitable for modeling this mainly due to the turbine wheel and the liquid having a non-stationary relative motion.In recent times, significant progress in CFD simulation has been made, which also is relevant for Pelton turbines.Nevertheless, it is still common to perform costly model tes...

  15. Wind Turbine Technologies

    DEFF Research Database (Denmark)

    Hansen, Anca Daniela

    2017-01-01

    , and with or without gearboxes, using the latest in power electronics, aerodynamics, and mechanical drive train designs [4]. The main differences between all wind turbine concepts developed over the years, concern their electrical design and control. Today, the wind turbines on the market mix and match a variety......, the design of wind turbines has changed from being convention driven to being optimized driven within the operating regime and market environment. Wind turbine designs have progressed from fixed speed, passive controlled and with drive trains with gearboxes, to become variable speed, active controlled......,6] and to implement modern control system strategies....

  16. Max Jakobson : Kommunismisse tuleb suhtuda objektiivselt / Max Jakobson ; interv. Kai Tänavsuu

    Index Scriptorium Estoniae

    Jakobson, Max, 1923-2013

    2002-01-01

    Inimsusevastaste Kuritegude Uurimise Rahvusvahelise Komisjoni esimees Max Jakobson oma suhtumisest talle Maarjamaa Risti I klassi teenetemärgi andmisse, tema juhitava komisjoni tööst, eestlaste püüdlusest ühineda NATOga, kommunismi ja natsismi hukkamõistust

  17. George Herbert Mead, La Philosophie du temps en perspective(s)

    OpenAIRE

    Leclerc, Natalia

    2013-01-01

    L’ouvrage intitulé La Philosophie du temps en perspective(s) comporte plusieurs textes de G. H. Mead, précédés d’une importante introduction de Michèle Leclerc-Olive, qui présente « Les figures du temps dans la philosophie de George Herbert Mead ». Son caractère pédagogique est très appréciable : elle permet en effet d’entrer progressivement dans la pensée, ou plutôt dans les différentes facettes et étapes de la réflexion de Mead. Il est extrêmement dense, et le présent compte rendu n’a pas d...

  18. Capitalisation du temps et différenciation par le genre

    OpenAIRE

    Thoemmes , Jens; Thébault , Claire; Flautre , Anne

    1999-01-01

    18p.; International audience; En instituant un dispositif dénommé " Compte-épargne-temps " (CET), la loi française relative à l'amélioration de la participation des salariés dans l'entreprise du 27 juillet 1994 visait d'une part, à favoriser le développement de l'emploi par la prise d'un congé d'au moins 6 mois, et d'autre part, à permettre la distribution des gains de productivité aux salariés sous forme de temps libre indemnisé. Le dispositif a pour objet de permettre aux salariés d'accumul...

  19. EVALUASI FISIKOKIMIA SOSIS TEMPE-DUMBO [Physicochemical Evaluation of Tempeh-Fish Sausage

    Directory of Open Access Journals (Sweden)

    T J Moedjiharto

    2003-08-01

    Full Text Available Evaluation on the physicochemical property of “tempe-dumbo” sausage made from meat of Clarias gariepinus and tempeh flour has been carried out. Randomized design with tree replications were used. Sausages were prepared from tempeh flour and fish meat in the proportion of: 1:0; 1:0,2; 1:0,3; 1:10,4 and 1:0,5 (w /w. Hardness, total volatile bases (TVB, and taste were evaluated. The results showed that the proportion of flour tempeh influenced the content the quality of “tempe-dumbo” sausage in term of protein quality, TVB.and taste. The addition of tempeh flour had significant effect the decrease essential amino acids, of total amino acids content, and organoleptic ascore (taste and flavor. . “Tempeh-dumbo” sausage contained essential amino acid of 27,354 mg/ g, protein which was consisted of 7 essential amino acid.

  20. Temp-to-permanent employees: a longitudinal study of stress and selection success.

    Science.gov (United States)

    Bauer, T N; Truxillo, D M

    2000-07-01

    Temp-to-permanent employees are temporary workers who have the opportunity to become permanent employees after a specific amount of time (e.g., generally after a 3- to 12-month period of trial work). The authors predicted that temporary worker individual differences, self-monitoring, tolerance for ambiguity, and role adjustment are related to temporary worker physiological stress and to whether temporary employees are offered permanent employment. Longitudinal data collection (pre- and postentry) resulted in data from 136 temp-to-permanent employees. Tolerance for ambiguity and role adjustment were found to be related to temporary worker stress and selection success. Self-monitoring was related to selection success for workers in an extended probationary period. These results suggest the need for further exploration and application of models of stress in understanding factors related to temporary worker success.

  1. Standardization of the TEMPS-A in the Greek general population.

    Science.gov (United States)

    Fountoulakis, Konstantinos N; Siamouli, Melina; Magiria, Matina; Pantoula, Eleonora; Moutou, Katerina; Kemeridou, Marina; Mavridou, Eirini; Panagiotidis, Panagiotis; Loli, Efimia; Batsiari, Elena; Preti, Antonio; Tondo, Leonardo; Gonda, Xenia; Rihmer, Zoltan; Akiskal, Kareen; Akiskal, Hagop

    2014-04-01

    The current study evaluates the reliability and factor-structure replicability of the Temperament Evaluation of Memphis, Pisa, Paris and San Diego Autoquestionnaire (TEMPS-A) in its Greek Version. The TEMPS-A was administered to a convenient sample of 734 subjects from the general Greek population (436 females; 59.4% and 298 males; 40.6%). Their mean age was 40.80±11.48 years (range 25-67 years). The analysis included the calculation of Chronbach's alpha, the calculation of the threshold to define dominant temperaments (+2 standard deviations or 95th percentile), confirmatory factor analysis and the calculation of Pearson correlation coefficients between the temperament scales scores. Analysis of Covariance with age as covariate and post-hoc t-test was used to search for differences in temperament scores between males and females. Also a table of percentile values corresponding to a raw score was created. Internal consistency was excellent for the various temperaments (0.72-0.88). The factor analysis confirmed the five factor solution as the best factor solution. All TEMPS items were included in the final version of the scale in the Greek language. The study sample included subjects from the general population, but it is a convenient and not representative sample. Although the authors tried to select them on the basis of being mentally healthy and without a psychiatric history, there is always a degree of uncertainty. There is also always the possibility some of them to manifest a mental disorder in the future, thus being currently in a premorbid state. The Greek version of the TEMPS-A, has good internal consistency and factor structure similar to what was found in other translations. Overall our results are in accord with the literature and in line with theoretical considerations as well as with empirical evidence. Copyright © 2013 Elsevier B.V. All rights reserved.

  2. PENGARUH BAHAN KEMASAN DAN LAMA INKUBASI TERHADAP KUALITAS TEMPE KACANG GUDE SEBAGAI SUMBER BELAJAR IPA

    Directory of Open Access Journals (Sweden)

    Sayuti Sayuti

    2015-11-01

    Full Text Available Pigeon pea can be used as an alternative of soybeans that contain protein, fats, and carbohydrates. Objective: (1 determine the effect of various packaging on the quality of pigeon pea tempe, (2 the effect of long incubation on the quality of pigeon pea tempe, (3 the interaction of various packaging and long incubation on the quality of pigeon pea tempeh. (4 design the research results as a science learning resource for 9th grade junior high school on the topic of biotechnology. The research design used completely randomized design. Research conducted at the Laboratory of Food Products Technology in Polinela in May 11th until 25th, 2015. Data were analyzed using SPSS 16.0, the data proximate using Univariate and Tukey, the data organoleptic using Friedman test. From the results of the proximate analysis turns out there is influence between the packaging materials and the long incubation of the tempe quality. Protein content increased, while fat and carbohydrates decreases with increasing time of incubation. Organoleptic analysis of the soybean leaves are packed with incubation time 36 and 42 hours is preferred by the panelists than plastic packaging with an incubation time of 48 hours. The results of the research can be used to design learning resources of scince for junior high School, based LKPD Form based scientific approach. Kata Kunci: Bahan kemasan, lama inkubasi, kacang gude, kualitas tempe,  sumber                         belajar

  3. BluLab: Temporal Information Extraction for the 2015 Clinical TempEval Challenge

    OpenAIRE

    Velupillai, Sumithra; Mowery, Danielle L.; Abdelrahman, Samir; Christensen, Lee; Chapman, Wendy W.

    2015-01-01

    The 2015 Clinical TempEval Challenge addressed the problem of temporal reasoning in the clinical domain by providing an annotated corpus of pathology and clinical notes related to colon cancer patients. The challenge consisted of six subtasks: TIMEX3 and event span detection, TIMEX3 and event attribute classification, document relation time and narrative container relation classification. Our BluLab team participated in all six subtasks. For the TIMEX3 and event subtasks, we developed a Clear...

  4. PERAN MEDIA MASSA DALAM PENINGKATAN PARTISIPASI PEMILIH PEMULA PADA PILKADA 2013 DI KECAMATAN TEMPE KABUPATEN WAJO

    Directory of Open Access Journals (Sweden)

    Hardini Hasanuddin

    2015-04-01

    Full Text Available Mass media is one of the factors that may affect the level of participation of voters in a local election. Based on this, the researchers were motivated to prove that the mass media have an important role in increasing the participation of voters in the local elections in 2013 in District Tempe Wajo. This research is a qualitative descriptive to decipher and interpret the data obtained from the process of organizing and sorting the data obtained from the field and from informants who were 18 people into patterns, categories, and a basic outline that can be found themes and formulated the working hypothesis the results of the study show the influence of the mass media of increasing participation of voters in the 2013 election in District Tempe Wajo. Such increase is influenced by factors; information.   Media Massa merupakan salah satu faktor yang dapat memepengaruhi tingkat partisipasi pemilih pada suatu pemilihan kepala daerah. Berdasarkan hal tersebut, peneliti termotivasi untuk membuktikan bahwa media massa mempunyai peran penting dalam peningkatan partisipasi pemilih pemula pada pemilihan kepala daerah 2013 di Kecamatan Tempe Kabupaten Wajo. Jenis penelitian ini adalah Deskriptif Kualitatif dengan menguraikan serta menginterprestasikan data yang diperoleh dari proses mengorganisasikan dan mengurutkan data yang di peroleh dari lapangan dan dari para informan yang berjumlah 18 orang kedalam pola, kategori, dan suatu uraian dasar sehingga dapat di temukan tema dan dirumuskan hipotesis kerja.Hasil penelitian menunjukkan adanya pengaruh media massa terhadap peningkatan partisipasi pemilih pemula pada pilkada 2013 di Kecamatan Tempe Kabupaten Wajo. Peningkatan tersebut sangat di pengaruhi oleh faktor; informasi.

  5. Tepung Tempe Kaya Isoflavon Meningkatkan Kadar Kalsium, Posfor dan Estrogen Plasma Tikus Betina Normal

    Directory of Open Access Journals (Sweden)

    I Nyoman Suarsana

    2012-11-01

    Full Text Available This research aimed to study the effect of isoflavon-riched tempe flour on calcium (Ca, phosphate(P, and estrogen levels in plasma et normal female rats during their growth period. A level oftwenty-five 2 months old female Sprague Dawley rats with an avarage body weight of 200 g wasrandomly divided into into 5 groups: one with control group (KO: without treatment and fourtreatment groups (K1, K2, K3, K4 : animals were given tempe flour with isoflavon at 1; 2; 4; and 6 mg/200 g/bw, respectively. The treatment was conducted for two months, following this blood plasmawas collected to analyse the level of calcium, phosphor, and estrogen, respectively. The resultshowed that although the plasma level of Ca, P, and estrogen was higher in the treatment groupcompare to the control group, this was not significantly different (P>0,05. The highest plasmalevel of Ca, P, and estrogen was seen in anmal receiving tempe flour with 4 mg/ 200 g bw/dayisoflavon.

  6. 10 Contribution à la régulation de la température au sein d'un ...

    African Journals Online (AJOL)

    ALI

    Cette dégradation est influencée par plusieurs facteurs tels que : le pH, la température, la teneur en eau, etc. [2]. La température au ... Le digesteur étudié est de type batch, rempli à moitié dont l'autre moitié sert pour contenir le gaz produit. Le substrat utilisé .... coefficient d'absorption de la plaque; G éclairement solaire;.

  7. Multivariate max-stable spatial processes

    KAUST Repository

    Genton, Marc G.; Padoan, S. A.; Sang, H.

    2015-01-01

    Max-stable processes allow the spatial dependence of extremes to be modelled and quantified, so they are widely adopted in applications. For a better understanding of extremes, it may be useful to study several variables simultaneously. To this end, we study the maxima of independent replicates of multivariate processes, both in the Gaussian and Student-t cases. We define a Poisson process construction and introduce multivariate versions of the Smith Gaussian extreme-value, the Schlather extremal-Gaussian and extremal-t, and the Brown–Resnick models. We develop inference for the models based on composite likelihoods. We present results of Monte Carlo simulations and an application to daily maximum wind speed and wind gust.

  8. Multivariate max-stable spatial processes

    KAUST Repository

    Genton, Marc G.

    2015-02-11

    Max-stable processes allow the spatial dependence of extremes to be modelled and quantified, so they are widely adopted in applications. For a better understanding of extremes, it may be useful to study several variables simultaneously. To this end, we study the maxima of independent replicates of multivariate processes, both in the Gaussian and Student-t cases. We define a Poisson process construction and introduce multivariate versions of the Smith Gaussian extreme-value, the Schlather extremal-Gaussian and extremal-t, and the Brown–Resnick models. We develop inference for the models based on composite likelihoods. We present results of Monte Carlo simulations and an application to daily maximum wind speed and wind gust.

  9. Un manuscrito del taller de Max Aub

    Directory of Open Access Journals (Sweden)

    Javier Lluch Prats

    2002-11-01

    Full Text Available Max Aub's legacy has recently helped to find some of the author's autograph testimonies than enlighten his printed work. The manuscript of the historical novel Campo del Moro (1963 is here described and the contributions of a modern manuscript to a critical-genetic edition are also appreciated. The composition elements of Campo del Moro are particularly analyzed the title, the quotations, the working plan and the notes about the characters. All this results in a better knowledge of the novel, gíving us the possibility of describing the process of its writing so as to facilitate the narration of its editorial vicissitiudes. i.e. genesis, preparation, edition and, publication.

  10. Max Weber entre liberalismo y republicanismo

    Directory of Open Access Journals (Sweden)

    Villacañas Berlanga, José Luis

    2005-12-01

    Full Text Available This article attempts to analyze the differences between social democracy and political democracy as modern processes, as these were understood by Max Weber. The archetype of modernity resides, from this point of view, in a convergence of both processes, as occurred in countries like the USA and Great Britain. Weber's diagnosis is that, whereas social democracy can be organized around liberal arguments, political democracy cannot advance without republican concepts like those of virtue, rigour, responsability and representation. For Weber, these values could only become present in Germany thanks to an adequate and democratic reception of Nietzsche, and in some way this reception could make sense of the former's work.

    Este artículo pretende analizar las diferencias entre democracia social y democracia política como procesos modernos, tal y como fueron comprendidos por Max Weber. Lo arquetípico de la modernidad reside, desde este punto de vista, en una convergencia de ambos procesos, tal y como se dio en países como USA y Gran Bretaña. El diagnóstico de Weber es que, mientras la democracia social puede organizarse sobre argumentos liberales, la democracia política no puede avanzar sin conceptos republicanos como el de virtud, rigor, responsabilidad y representación. Para Weber, estos valores sólo podrían hacerse presentes en Alemania a partir de una recepción adecuada y democrática de Nietzsche y en cierto modo esta recepción daría sentido a su obra.

  11. Modcomp MAX IV System Processors reference guide

    Energy Technology Data Exchange (ETDEWEB)

    Cummings, J.

    1990-10-01

    A user almost always faces a big problem when having to learn to use a new computer system. The information necessary to use the system is often scattered throughout many different manuals. The user also faces the problem of extracting the information really needed from each manual. Very few computer vendors supply a single Users Guide or even a manual to help the new user locate the necessary manuals. Modcomp is no exception to this, Modcomp MAX IV requires that the user be familiar with the system file usage which adds to the problem. At General Atomics there is an ever increasing need for new users to learn how to use the Modcomp computers. This paper was written to provide a condensed Users Reference Guide'' for Modcomp computer users. This manual should be of value not only to new users but any users that are not Modcomp computer systems experts. This Users Reference Guide'' is intended to provided the basic information for the use of the various Modcomp System Processors necessary to, create, compile, link-edit, and catalog a program. Only the information necessary to provide the user with a basic understanding of the Systems Processors is included. This document provides enough information for the majority of programmers to use the Modcomp computers without having to refer to any other manuals. A lot of emphasis has been placed on the file description and usage for each of the System Processors. This allows the user to understand how Modcomp MAX IV does things rather than just learning the system commands.

  12. Guide to hydro turbines

    International Nuclear Information System (INIS)

    Anon.

    1991-01-01

    This listing is a guide to turbines for hydroelectric projects of independent energy projects. The listing is in directory format and includes the supplier's name, the name of the supplier's contact, address, telephone and FAX numbers and a description of the company and the types of turbines, services and expertise available for energy projects. The listing is international in scope

  13. Improvement of turbine materials

    International Nuclear Information System (INIS)

    Jakobeit, W.; Pfeifer, J.P.

    1982-01-01

    Materials for turbine blades and rotors are discussed with a view to the following subjects: Long period creep behaviour, gas/metal reactions, fatigue behaviour in long-term and creep strength testing, fracture mechanics testing, creep/fatigue interactions, development of a turbine blade of TZM, jointing of TZM, decontamination. (orig./IHOE) [de

  14. Strategi Pemasaran Agroindustri Keripik Tempe di Desa Buluh Rampai Kecamatan Seberida Kabupaten Indragiri Hulu

    Directory of Open Access Journals (Sweden)

    Nirmala Sari

    2016-03-01

    Full Text Available This study aimed to identify the aspects of the strengths, weaknesses, opportunities and threats facing the agroindustry marketing of Dua Putri tempe chips and formulate marketing strategies Dua Putri tempechips agroindustry by using SWOT analysis. The results showed that internal factors encountered in the marketing of Dua Putri tempeagro-chips in Indragiri Hulu is Strength: choose a label and branded products, entrepreneurs have a long experience, the product is attractive enough for all people, and the products do not use preservatives. Weakness: The product can be easily damaged and destroyed, packaging using a simple wrapper, product marketing has not come out Indragiri Hulu, and promotion is still limited. External factors include: Opportunities: products already well known, a product that can compete with similar products, the market is still wide open, the exhibition and promotion opportunities. Threat; Many competitors of similar products, the market demand fluctuates, and the limitations of market information and for marketing strategies Dua Putritempechips agroindustry is to maintain existing markets and seek new markets including exhibition, the exhibition is there to improve their skills in providing products with flavor worth nutrition, make packaging more attractive in order to reach the marketing of products inside and outside the district, improve the taste and quality and maximize promotion, looking for alternative marketing channels. Keywords: strategy, consumer, marketing, SWOTPenelitian ini bertujuan untuk mengidentifikasi aspek kekuatan, kelemahan, peluang dan ancaman yang dihadapi pemasaran agroindustri keripik tempe Dua Putri dan merumuskan strategi pemasaran agroindustri keripik tempe Dua Putri  dengan menggunakan analisis SWOT. Hasil penelitian menunjukkan bahwa faktor internal yang dihadapi dalam pemasaran agroindustri keripik tempe Dua Putri  di Indragiri Hulu adalah Kekuatan: memilih label dan produk bermerek

  15. Noise from wind turbines

    International Nuclear Information System (INIS)

    Andersen, B.; Larsen, P.

    1993-01-01

    Denmark has 3200 wind turbines with an installed maximum capacity of 418MW. The most important Danish research projects into wind turbine noise and the main results are listed. These date from 1983. Two comprehensive studies are currently in progress. The first is an analytical and empirical investigation of aerodynamic noise from wind turbine rotors and has so far dealt mainly with tip noise. The measurement method, using a hard board mounted microphone on the ground near the turbine, is described. Four different tip designs have been tested. Some examples of reference sound power level spectra for three of the designs are presented. During the past two years a computerbased data acquisition system has been used for real-time determination of sound power levels. The second study, which has just commenced, is on annoyance from wind turbine noise. It will include noise measurements, masking calculations and a social survey on the perceived nuisance. (UK)

  16. Graphene in turbine blades

    Science.gov (United States)

    Das, D. K.; Swain, P. K.; Sahoo, S.

    2016-07-01

    Graphene, the two-dimensional (2D) nanomaterial, draws interest of several researchers due to its many superior properties. It has extensive applications in numerous fields. A turbine is a hydraulic machine which extracts energy from a fluid and converts it into useful work. Recently, Gudukeya and Madanhire have tried to increase the efficiency of Pelton turbine. Beucher et al. have also tried the same by reducing friction between fluid and turbine blades. In this paper, we study the advantages of using graphene as a coating on Pelton turbine blades. It is found that the efficiency of turbines increases, running and maintenance cost is reduced with more power output. By the application of graphene in pipes, cavitation will be reduced, durability of pipes will increase, operation and maintenance cost of water power plants will be less.

  17. Max Weber Visits America: A Review of the Video

    OpenAIRE

    Michael Wise

    2006-01-01

    The North Carolina Sociological Society is proud to announce the long-awaited video of Max Weber's trip to North Carolina as retold by two of his cousins. Max Weber made a trip to visit relatives in Mount Airy, North Carolina, in 1904. This 2004 narrative by Larry Keeter and Stephen Hall is the story of locating and interviewing two living eyewitnesses (1976) to Max Weber's trip. The video includes information about Weber's contributions to modern sociology. Dowloadable files are provided...

  18. Tukey max-stable processes for spatial extremes

    KAUST Repository

    Xu, Ganggang

    2016-09-21

    We propose a new type of max-stable process that we call the Tukey max-stable process for spatial extremes. It brings additional flexibility to modeling dependence structures among spatial extremes. The statistical properties of the Tukey max-stable process are demonstrated theoretically and numerically. Simulation studies and an application to Swiss rainfall data indicate the effectiveness of the proposed process. © 2016 Elsevier B.V.

  19. Max Weber Visits America: A Review of the Video

    Directory of Open Access Journals (Sweden)

    Michael Wise

    2006-11-01

    Full Text Available The North Carolina Sociological Society is proud to announce the long-awaited video of Max Weber's trip to North Carolina as retold by two of his cousins. Max Weber made a trip to visit relatives in Mount Airy, North Carolina, in 1904. This 2004 narrative by Larry Keeter and Stephen Hall is the story of locating and interviewing two living eyewitnesses (1976 to Max Weber's trip. The video includes information about Weber's contributions to modern sociology. Dowloadable files are provided using the .mp4 format. The video should appeal to students and professors interested in Max Weber. It can be included in courses ranging from introductory sociology to theory.

  20. Synthesis and Characterization of MAX Ceramics (MAXCERs)

    Science.gov (United States)

    Nelson, Johnny Carl

    This research has focused on the design and development of novel multifunctional MAX reinforced ceramics (MAXCERs). These MAXCERs were manufactured with 1-50 vol% ratios of ceramics to MAX phases. Chapter II reports on the synthesis and tribological behavior of Ti3SiC2 matrix composites by incorporating (1 and 6 vol%) Al2O3, (1 and 5 vol%) BN, and (1 and 5 vol%) B4C ceramic particulate additives in the matrix. All the composites were fabricated by pressureless sintering by using 1 wt% Ni as a sintering agent at 1550 °C for 2 hours. SEM and XRD studies showed that Al2O3 is relatively inert in the Ti3SiC 2 matrix whereas BN and B4C reacted significantly with the Ti3 SiC2 matrix to form TiB2. Detailed tribological studies showed that Ti3SiC2-1wt%Ni (baseline) samples showed dual type tribological behavior where the friction coefficient (micro) was low ( 0.2) during stage 1, thereafter micro increased sharply and transitioned into stage 2 ( 0.8). The addition of Al2O3 as an additive had little effect on the tribological behavior, but the addition of B4C and BN was able to enhance the tribological behavior by increasing the transition distance (TD). Chapter III reports on the synthesis and tribological behavior of TiB2 matrix composites by incorporating (10, 30, and 50 vol%) Ti3SiC2 ceramic particulate additives in the matrix. The fabrication parameters were similar to the Ti3SiC2 samples from Chapter II. There was minimal reaction between the TiB2 and the Ti3SiC2. Detailed tribological studies showed that TiB2 (baseline) and TiB2-10%Ti 3SiC2 samples showed an average micro of 0.29 and 0.28, respectively. TiB2-30%Ti3SiC2 and TiB 2-50%Ti3SiC2 showed dual-type tribological behavior where micro was low ( 0.25) during stage 1, thereafter micro increased gradually and transitioned into stage 2 ( 0.6). Low wear rates were seen for all samples.

  1. Regard sur Le Temps des grâces, de Dominique Marchais A look at Le temps des grâces by Dominique Marchais Una mirada a Le temps des grâces, de Dominique Marchais

    Directory of Open Access Journals (Sweden)

    Christèle Dondeyne

    2013-03-01

    Full Text Available Le documentaire Le Temps des grâces de Dominique Marchais s’attache aux regards que des agriculteurs de différentes générations portent sur leur activité et aux analyses d’agronomes et d’économistes sur l’agriculture française. Il donne à voir quelques unes des multiples façons dont le travail agricole modèle les paysages et les écosystèmes et souligne le poids des politiques publiques dans ces orientations. Son constat global laisse plus de place à une industrialisation de l’agriculture qui conduit à l’uniformisation des produits et à la mort des sols qu’à des alternatives viables pour les écosystèmes. La confrontation de ce documentaire avec des travaux majeurs de la sociologie sur ce thème produit une impression de décalage et renvoie à des réflexions théoriques et méthodologiques.Dominique Marchais’ documentary, Le Temps des grâces, deals with different farmer generations’ vision of their work. It also provides an agronomic and economic analysis of French farming, showing some of the many different ways in which agricultural activity shapes landscape and ecosystems, while stressing the responsibility of public policy in such processes. The general observation highlights the growing industrialisation of agriculture, leading more to the uniformisation of products and destruction of soil fertility than to ecologically viable alternatives. When compared with major sociological studies in this area, the documentary highlights certain deviations while referring to theoretical and methodological thinking in this domain.En su documental Le Temps des grâces, Dominique Marchais se interesa en la visión que agricultores de diferentes generaciones tienen de su quehacer y en algunos análisis de la agricultura francesa realizados por agrónomos y economistas. Su trabajo permite vislumbrar algunas de las múltiples formas en que el trabajo agrícola modela los paisajes y los ecosistemas, y hace hincapié en el

  2. SpikeTemp: An Enhanced Rank-Order-Based Learning Approach for Spiking Neural Networks With Adaptive Structure.

    Science.gov (United States)

    Wang, Jinling; Belatreche, Ammar; Maguire, Liam P; McGinnity, Thomas Martin

    2017-01-01

    This paper presents an enhanced rank-order-based learning algorithm, called SpikeTemp, for spiking neural networks (SNNs) with a dynamically adaptive structure. The trained feed-forward SNN consists of two layers of spiking neurons: 1) an encoding layer which temporally encodes real-valued features into spatio-temporal spike patterns and 2) an output layer of dynamically grown neurons which perform spatio-temporal classification. Both Gaussian receptive fields and square cosine population encoding schemes are employed to encode real-valued features into spatio-temporal spike patterns. Unlike the rank-order-based learning approach, SpikeTemp uses the precise times of the incoming spikes for adjusting the synaptic weights such that early spikes result in a large weight change and late spikes lead to a smaller weight change. This removes the need to rank all the incoming spikes and, thus, reduces the computational cost of SpikeTemp. The proposed SpikeTemp algorithm is demonstrated on several benchmark data sets and on an image recognition task. The results show that SpikeTemp can achieve better classification performance and is much faster than the existing rank-order-based learning approach. In addition, the number of output neurons is much smaller when the square cosine encoding scheme is employed. Furthermore, SpikeTemp is benchmarked against a selection of existing machine learning algorithms, and the results demonstrate the ability of SpikeTemp to classify different data sets after just one presentation of the training samples with comparable classification performance.

  3. Turbine blade vibration dampening

    Science.gov (United States)

    Cornelius, C.C.; Pytanowski, G.P.; Vendituoli, J.S.

    1997-07-08

    The present turbine wheel assembly increases component life and turbine engine longevity. The combination of the strap and the opening combined with the preestablished area of the outer surface of the opening and the preestablished area of the outer circumferential surface of the strap and the friction between the strap and the opening increases the life and longevity of the turbine wheel assembly. Furthermore, the mass ``M`` or combined mass ``CM`` of the strap or straps and the centrifugal force assist in controlling vibrations and damping characteristics. 5 figs.

  4. Composite turbine bucket assembly

    Science.gov (United States)

    Liotta, Gary Charles; Garcia-Crespo, Andres

    2014-05-20

    A composite turbine blade assembly includes a ceramic blade including an airfoil portion, a shank portion and an attachment portion; and a transition assembly adapted to attach the ceramic blade to a turbine disk or rotor, the transition assembly including first and second transition components clamped together, trapping said ceramic airfoil therebetween. Interior surfaces of the first and second transition portions are formed to mate with the shank portion and the attachment portion of the ceramic blade, and exterior surfaces of said first and second transition components are formed to include an attachment feature enabling the transition assembly to be attached to the turbine rotor or disk.

  5. Intertextuality and Television Discourse: The Max Headroom Story.

    Science.gov (United States)

    Braddlee

    Max Headroom, the computer-generated media personality, presents a good opportunity for an investigation of the degree of intertextuality in television. Max combines narrative genres (science fiction and film noir), television program types (prime-time episodic narrative, made-for-TV movie, talkshows), advertising and programming, and electronic…

  6. Max Weber's Critique of the Bureaucratisation of Education

    Science.gov (United States)

    Madan, Amman

    2014-01-01

    In this commentary, the author discusses the critique by Max Weber and his views on bureaucratisation of education. The modern school, said Max Weber (1864-1920) over a hundred years ago, has as its educational ideal the bureaucrat and no longer the cultivated elite of older times. The shift to modernity and to its characteristic institution, the…

  7. Reachability analysis for timed automata using max-plus algebra

    DEFF Research Database (Denmark)

    Lu, Qi; Madsen, Michael; Milata, Martin

    2012-01-01

    We show that max-plus polyhedra are usable as a data structure in reachability analysis of timed automata. Drawing inspiration from the extensive work that has been done on difference bound matrices, as well as previous work on max-plus polyhedra in other areas, we develop the algorithms needed...

  8. Max Jakobsoni saatuseaastad, soomlased ja meie / Imbi Paju

    Index Scriptorium Estoniae

    Paju, Imbi, 1959-

    2008-01-01

    Soome politoloogist ja diplomaadist Max Jakobsonist ja tema uuest raamatust "Saatuseaastad. Soome tõusis, andis Venemaale järele ja pääses". Artiklis on juttu ka Max Jakobsoni suhetest Eesti presidentide Lennart Meri ja Toomas Hendrik Ilvesega

  9. Deterministic algorithms for multi-criteria Max-TSP

    NARCIS (Netherlands)

    Manthey, Bodo

    2012-01-01

    We present deterministic approximation algorithms for the multi-criteria maximum traveling salesman problem (Max-TSP). Our algorithms are faster and simpler than the existing randomized algorithms. We devise algorithms for the symmetric and asymmetric multi-criteria Max-TSP that achieve ratios of

  10. KOMPOSISI KIMIA DAN ORGANOLEPTIK FORMULA NUGGET BERBASIS TEPUNG TEMPE DAN TEPUNG RICEBRAN

    Directory of Open Access Journals (Sweden)

    Sufiati Bintanah

    2014-07-01

    Full Text Available Abstrak Di Indonesia terjadi perubahan pola penyakit dari infeksi dan kekurangan gizi ke degeneratif dan kanker akibat perubahan gaya hidup dan pola makan  tinggi lemak dan rendah serat serta modernisasi pola hidup. Tempe kedelai merupakan bahan makanan yang dapat menurunkan trigliserida, kolesterol total, kolesterol LDL, serta meningkatkan kolesterol HDL. Bekatul juga merupakan bahan makanan yang dapat menurunkan kadar lemak darah karena mengandung oryzanol, tokoferol, dan asam felurat. Tujuan dari penelitian ini adalah untuk menyeleksi formula nugget berdasarkan karakteristik fisik, kimia dan organoleptik serta aktifitas antioksidan. Jenis penelitian ini adalah penelitian diskriptif dengan perlakuan formulasi tepung tempe dan tepung ricebran sebanyak 10 formula. Analisis komposisi kimia dilakukan terhadap bahan mentah dan nugget meliputi analisis protein (mikro kjedhl, lemak (soxhlet, air (oven, karbohidrat (Luff Schoorl l, penetapan kadar Vitamin E (Alfa-Tokoferol, analisa aktivitas anti bakteri metode difusi agar. Pengujian organoleptik menggunakan metode scoring. Hasil menunjukkan nugget dengan formula tepung tempe 50% dan tepung bekatul 50% (formula A7, mempunyai komposisi kimia terbaik yaitu protein 19,5g%, lemak 18.33g%, air 35.59%, abu 1,62%, serat kasar 9,57g%, Karbohidrat 25,41 g%, Vitamin E 148,92 µg/g, aktifitas antioksidan 197,1 µg/ml. Hasil pengujian organoleptik terhadap warna, rasa, aroma maupun tekstur yang paling disuka pada formula A7. Kesimpulan: Optimasi tepung tempe dan rice bran yang diterima berdasarkan sifat fisik, organoleptik dan analisa zat gizi adalah dengan perlakuan sangrai 20 menit. Formula nugget yang optimum A7 dengan perbandingan tepung tempe dan rice bran 50:50 g. Kata Kunci: Komposisi Kimia, Organoleptik, Formula Nugget, Tepung Tempe, Ricebran Abstract In Indonesia, there has been a changing disease pattern from infectious and food deficiency diseases to degenerative and cancerous diseases. Soy bean cake

  11. An instrument for measuring doubling time; Un appareillage de mesure de temps de doublement

    Energy Technology Data Exchange (ETDEWEB)

    Ailloud, J; Chandanson, P [Commissariat a l' Energie Atomique, Saclay (France). Centre d' Etudes Nucleaires

    1956-07-01

    The instrument described here allows the direct and almost immediate measurement, with a precision of the order of 1 per cent, of the time taken by a reactor to double its power. The method of measurement consists of noting the instants when the power of the reactor passes the levels P{sub 1} and P{sub 2} such that P{sub 2} = 2 P{sub 1}, and of measuring the time lapse between these two instants. The instrument picks out, in the course of one rise in power, several levels, P{sub 1}, P{sub 2}, P{sub 3}... etc, chosen in such a manner as to give several successive measurements of the doubling time. It is also capable of making these same measurements when the reactor is working below the critical level. (author) [French] L'appareil decrit ici permet la mesure directe et quasi immediate du temps de doublement de la puissance d'un reacteur avec une precision de l'ordre de 1 pour cent. La methode de mesure consiste a reperer les instants de passage de la puissance du reacteur par des niveaux P{sub 1} et P{sub 2} tels que P{sub 2} = 2 P{sub 1}, et a mesurer le temps ecoule entre ces deux instants. L'appareil repere, au cours d'une meme montee en puissance, plusieurs niveaux, P{sub 1}, P{sub 2}, P{sub 3}... etc, choisis de maniere a donner plusieurs mesures successives du temps de doublement. Il est egalement utilisable pour effectuer ces memes mesures lorsque le reacteur est en regime sous-critique. (auteur)

  12. TEMP-STRESS analysis of a reinforced concrete vessel under internal pressure

    International Nuclear Information System (INIS)

    Marchertas, A.H.; Kennedy, J.M.; Pfeiffer, P.A.

    1987-01-01

    Prediction of the response of the Sandia National laboratory 1/6-scale reinforced concrete containment model test was obtained by Argonne National Laboratory (ANL) employing a computer program developed by ANL. The test model was internally pressurized to failure. The two-dimensional code TEMP-STRESS [1-5] has been developed at ANL for stress analysis of plane and axisymmetric 2-D reinforced structures under various thermal conditions. The program is applicable to a wide variety of nonlinear problems, and is utilized in the present study. The comparison of these pretest computations with test data on the containment model should be a good indication of the state of the code

  13. La PCR quantitative en temps réel : application à la quantification des OGM

    Directory of Open Access Journals (Sweden)

    Alary Rémi

    2002-11-01

    Full Text Available Suite à l’obligation d’étiquetage, au seuil de 1 %, des aliments contenant des OGM autorisés, il est nécessaire de disposer de méthodes fiables de quantification. Pour répondre à cette obligation, la technique de PCR quantitative en temps réel semble actuellement la mieux adaptée. Son principe, ses avantages et sa mise en oeuvre pour la détermination de la teneur en OGM de farines de soja sont présentés. Les PCR simplex et duplex sont comparées.

  14. LHC 2008 talks Peut-on voyager dans le temps? (Is time travel possible?)

    CERN Multimedia

    2008-01-01

    Scientific magazines (and sometimes even scientists themselves) regularly talk about the possibility of travelling through time. It has also been the subject of many science-fiction novels. We will first discuss what we mean when we talk about time travel, then explain what contemporary physics has to say about it. Thursday, 12 June 2008 at 8.00 p.m. Peut-on voyager dans le temps ? Etienne Klein Physicist at CEA and Doctor of Philosophy of Science The Globe, first floor No specialist knowledge required. Entrance free. http://www.cern.ch/globe

  15. Superconducting wind turbine generators

    DEFF Research Database (Denmark)

    Abrahamsen, Asger Bech; Mijatovic, Nenad; Seiler, Eugen

    2010-01-01

    , the main challenge of the superconducting direct drive technology is to prove that the reliability is superior to the alternative drive trains based on gearboxes or permanent magnets. A strategy of successive testing of superconducting direct drive trains in real wind turbines of 10 kW, 100 kW, 1 MW and 10......We have examined the potential of 10 MW superconducting direct drive generators to enter the European offshore wind power market and estimated that the production of about 1200 superconducting turbines until 2030 would correspond to 10% of the EU offshore market. The expected properties of future...... offshore turbines of 8 and 10 MW have been determined from an up-scaling of an existing 5 MW turbine and the necessary properties of the superconducting drive train are discussed. We have found that the absence of the gear box is the main benefit and the reduced weight and size is secondary. However...

  16. Turbine disintegration debris

    International Nuclear Information System (INIS)

    Holecek, M.; Martinec, P.; Malotin, V.; Peleska, P.; Voldrich, J.

    1997-01-01

    The determination, evaluation and analysis of possible unacceptable consequences of the disintegration turbine (turbo-set) missiles is a part of the wide conceived project put by the company Nuclear Power Plant Mochovce (NPPM), the Slovak Republic. The aim of the project is to take measures reducing the probability of striking a target of safety importance in NPPM by a turbine (turbo-set) missile below the prescribed limit of 10 -6 per turbine year. Following the IAEA Safety Guides, all potential events leading to the generation of a missile are to be analysed. It is necessary to evaluate the probability of unacceptable consequences of such missiles and analyse each event whose probability is not acceptable low. This complex problem thus carries especially: complex analysis of fragment generation; evaluation of the probability of unacceptable events; location of strike zones of possible turbine missiles; assessment the possibility of the turbo-set casing penetration; and projection of additional design requirements if necessary

  17. Monitoring of wind turbines

    Science.gov (United States)

    White, Jonathan R.; Adams, Douglas E.; Paquette, Josh

    2017-07-25

    Method and apparatus for determining the deflection or curvature of a rotating blade, such as a wind turbine blade or a helicopter blade. Also, methods and apparatus for establishing an inertial reference system on a rotating blade.

  18. Max Weber in the United States

    Directory of Open Access Journals (Sweden)

    Lawrence A. Scaff

    2014-05-01

    Full Text Available In his contribution L. Scaff outlines the reception history of Max Weber’s work from its beginnings down to the present. It highlights the importance of the first translations, including those by prominent American authors and particularly those who had studied in Germany; and then in the post-war years the role of emigrants familiar with Weber’s work. The establishment of Weber texts as compulsory reading in the curricula of American colleges also played a significant role. The striking readiness, even ease, with which Weber was received in America is something Scaff deduces from three “narratives that captured the imagination of the American audience”. The first is the narrative of voluntarism, i.e. “the way in which Weber developed his conception of the sect and its effects on the individual and society”. Next is the narrative of achievement, in the sense of “mastery of the world”, preceded by “mastery of the self”, which “when put into practice entailed the conquest of the New World’s primordial wilderness”. Finally there is the narrative of redemption as “the most potent founding myth of the American experience”: “The quest for salvation that began as a religiously inspired message became transformed into a secularized cultural theme: the search for the possibility of breaking free from constraints in order to create a better life, to renew the self, to gain a second chance by atoning for moral failures, and to find reconciliation with God, humankind, and the world.”

  19. Noise from wind turbines

    Energy Technology Data Exchange (ETDEWEB)

    Fegeant, Olivier [Royal Inst. of Tech., Stockholm (Sweden). Dept. of Building Sciences

    2002-02-01

    A rapid growth of installed wind power capacity is expected in the next few years. However, the siting of wind turbines on a large scale raises concerns about their environmental impact, notably with respect to noise. To this end, variable speed wind turbines offer a promising solution for applications in densely populated areas like the European countries, as this design would enable an efficient utilisation of the masking effect due to ambient noise. In rural and recreational areas where wind turbines are sited, the ambient noise originates from the action of wind on the vegetation and about the listener's ear (pseudo-noise). It shows a wind speed dependence similar to that of the noise from a variable speed wind turbine and can therefore mask the latter for a wide range of conditions. However, a problem inherent to the design of these machines is their proclivity to pure tone generation, because of the enhanced difficulty of avoiding structural resonances in the mechanical parts. Pure tones are deemed highly annoying and are severely regulated by most noise policies. In relation to this problem, the vibration transmission of structure-borne sound to the tower of the turbine is investigated, in particular when the tower is stiffened at its upper end. Furthermore, since noise annoyance due to wind turbine is mostly a masking issue, the wind-related sources of ambient noise are studied and their masking potentials assessed. With this aim, prediction models for wind-induced vegetation noise and pseudo-noise have been developed. Finally, closely related to the effect of masking, is the difficulty, regularly encountered by local authorities and wind farm developers, to measure noise immission from wind turbines. A new measurement technique has thus been developed in the course of this work. Through improving the signal-to-noise ratio between wind turbine noise and ambient noise, the new technique yields more accurate measurement results.

  20. A Fast Numerical Method for Max-Convolution and the Application to Efficient Max-Product Inference in Bayesian Networks.

    Science.gov (United States)

    Serang, Oliver

    2015-08-01

    Observations depending on sums of random variables are common throughout many fields; however, no efficient solution is currently known for performing max-product inference on these sums of general discrete distributions (max-product inference can be used to obtain maximum a posteriori estimates). The limiting step to max-product inference is the max-convolution problem (sometimes presented in log-transformed form and denoted as "infimal convolution," "min-convolution," or "convolution on the tropical semiring"), for which no O(k log(k)) method is currently known. Presented here is an O(k log(k)) numerical method for estimating the max-convolution of two nonnegative vectors (e.g., two probability mass functions), where k is the length of the larger vector. This numerical max-convolution method is then demonstrated by performing fast max-product inference on a convolution tree, a data structure for performing fast inference given information on the sum of n discrete random variables in O(nk log(nk)log(n)) steps (where each random variable has an arbitrary prior distribution on k contiguous possible states). The numerical max-convolution method can be applied to specialized classes of hidden Markov models to reduce the runtime of computing the Viterbi path from nk(2) to nk log(k), and has potential application to the all-pairs shortest paths problem.

  1. European wind turbine catalogue

    International Nuclear Information System (INIS)

    1994-01-01

    The THERMIE European Community programme is designed to promote the greater use of European technology and this catalogue contributes to the fulfillment of this aim by dissemination of information on 50 wind turbines from 30 manufacturers. These turbines are produced in Europe and are commercially available. The manufacturers presented produce and sell grid-connected turbines which have been officially approved in countries where this approval is acquired, however some of the wind turbines included in the catalogue have not been regarded as fully commercially available at the time of going to print. The entries, which are illustrated by colour photographs, give company profiles, concept descriptions, measured power curves, prices, and information on design and dimension, safety systems, stage of development, special characteristics, annual energy production, and noise pollution. Lists are given of wind turbine manufacturers and agents and of consultants and developers in the wind energy sector. Exchange rates used in the conversion of the prices of wind turbines are also given. Information can be found on the OPET network (organizations recognised by the European Commission as an Organization for the Promotion of Energy Technologies (OPET)). An article describes the development of the wind power industry during the last 10-15 years and another article on certification aims to give an overview of the most well-known and acknowledged type approvals currently issued in Europe. (AB)

  2. Wind turbines and health

    International Nuclear Information System (INIS)

    Rideout, K.; Copes, R.; Bos, C.

    2010-01-01

    This document summarized the potential health hazards associated with wind turbines, such as noise and low frequency sound, vibration and infrasound; electromagnetic fields (EMF); shadow flicker; and ice throw and structural failure. Various symptoms can be attributed to wind turbines, including dizziness, sleep disruption, and headaches. A review of available research regarding potential health affects to residents living in close proximity to wind turbines showed that the sound level associated with wind turbines at common residential setbacks is not sufficient to damage hearing, but may lead to annoyance and sleep disturbance. Research has shown that wind turbines are not a significant source of EMF exposure, and although shadows caused by the blades may be annoying, they are not likely to cause epileptic seizures at normal operational speeds. The risk of injury from ice throw can be minimized with setbacks of 200 to 400 m. Examples of Canadian wind turbine setback guidelines and regulations were also offered. It was concluded that setbacks and operational guidelines can be utilized in combination to address safety hazards, sound levels, land use issues, and impacts on people. 46 refs., 2 tabs., 2 figs.

  3. Wind turbines and infrasound

    International Nuclear Information System (INIS)

    Howe, B.

    2006-01-01

    This paper provided the results of a study conducted to assess the impacts of wind farm-induced infrasound on nearby residences and human populations. Infrasound occurs at frequencies below those considered as detectable by human hearing. Infrasonic levels caused by wind turbines are often similar to ambient levels of 85 dBG or lower that are caused by wind in the natural environment. This study examined the levels at which infrasound poses a threat to human health or can be considered as an annoyance. The study examined levels of infrasound caused by various types of wind turbines, and evaluated acoustic phenomena and characteristics associated with wind turbines. Results of the study suggested that infrasound near modern wind turbines is typically not perceptible to humans through either auditory or non-auditory mechanisms. However, wind turbines often create an audible broadband noise whose amplitude can be modulated at low frequencies. A review of both Canadian and international studies concluded that infrasound generated by wind turbines should not significantly impact nearby residences or human populations. 17 refs., 2 tabs., 4 figs

  4. Wind turbines and idiopathic symptoms

    DEFF Research Database (Denmark)

    Blanes-Vidal, Victoria; Schwartz, Joel

    2016-01-01

    Whether or not wind turbines pose a risk to human health is a matter of heated debate. Personal reactions to other environmental exposures occurring in the same settings as wind turbines may be responsible of the reported symptoms. However, these have not been accounted for in previous studies. We...... investigated whether there is an association between residential proximity to wind turbines and idiopathic symptoms, after controlling for personal reactions to other environmental co-exposures. We assessed wind turbine exposures in 454 residences as the distance to the closest wind turbine (Dw) and number...... of wind turbines

  5. Une brève histoire du temps du Big Bang aux trous noirs

    CERN Document Server

    Hawking, Stephen

    2017-01-01

    Stephen Hawking est universellement reconnu comme l'un des plus grands cosmologistes de notre époque et l'un des plus brillants physiciens depuis Einstein. Successeur de Newton, il occupe à l'université de Cambridge la chaire de Mathématiques, et s'est rendu célèbre pour ses travaux sur les origines de l'Univers. Une brève histoire du temps est le premier livre qu'il ait décidé d'écrire pour le non-spécialiste. Il y expose, dans un langage simple et accessible, les plus récents développements de l'astrophysique concernant la nature du temps et du monde. Retraçant les grandes théories du cosmos, de Galilée et Newton à Einstein et Poincaré, racontant les ultimes découvertes de l'espace, expliquant la nature des trous noirs, il propose ensuite de relever le plus grand défi de la science moderne : la recherche d'une théorie unitaire combinant et unifiant la relativité générale et la mécanique quantique. On sait que Stephen Hawking lutte depuis plus de trente ans contre une maladie neurolo...

  6. Les fondements de la mesure du temps comment les fréquences atomiques règlent le monde

    CERN Document Server

    Audoin, Claude

    1998-01-01

    La mesure du temps fondée sur des propriétés atomiques est née en 1955, avec le premier étalon de fréquence à jet de césium. Depuis, les horloges atomiques ne cessent de progresser et sont au coeur de nombreuses activités, telles que les comparaisons de temps, l'unification mondiale de l'heure ou la recherche en astronomie, géodésie, géophysique, télécommunications, etc. Cet ouvrage fournira des réponses détaillées au lecteur intéressé par la mesure du temps appliquée aux divers domaines cités.

  7. Digital logic circuit design with ALTERA MAX+PLUS II

    International Nuclear Information System (INIS)

    Lee, Seung Ho; Park, Yong Su; Lee, Ju Heon

    2006-03-01

    Contents of this book are the kinds of integrated circuit, design process of integrated circuit, introduction of ALTERA MAX+PLUS II, designing logic circuit with VHDL of ALTERA MAX+PLUS II, grammar and practice of VHDL of ALTERA MAX+PLUS II, design for adder, subtractor, parallel binary subtractor, BCD design, CLA design, code converter design, ALU design, register design, counter design, accumulator design, state machine design, frequency divider design, circuit design with TENMILLION counter, LCD module, circuit design for control the outside RAM in training kit and introduction for HEB-DTK-20K-240/HBE-DTK-IOK.

  8. Next Generation Wind Turbine

    Energy Technology Data Exchange (ETDEWEB)

    Cheraghi, S. Hossein [Western New England Univ., Springfield, MA (United States); Madden, Frank [FloDesign Wind Turbine Corp., Waltham, MA (United States)

    2012-09-01

    The goal of this collaborative effort between Western New England University's College of Engineering and FloDesign Wind Turbine (FDWT) Corporation to wok on a novel areodynamic concept that could potentially lead to the next generation of wind turbines. Analytical studies and early scale model tests of FDWT's Mixer/Ejector Wind Turbine (MEWT) concept, which exploits jet-age advanced fluid dynamics, indicate that the concept has the potential to significantly reduce the cost of electricity over conventional Horizontal Axis Wind Turbines while reducing land usage. This project involved the design, fabrication, and wind tunnel testing of components of MEWT to provide the research and engineering data necessary to validate the design iterations and optimize system performance. Based on these tests, a scale model prototype called Briza was designed, fabricated, installed and tested on a portable tower to investigate and improve the design system in real world conditions. The results of these scale prototype efforts were very promising and have contributed significantly to FDWT's ongoing development of a product scale wind turbine for deployment in multiple locations around the U.S. This research was mutually beneficial to Western New England University, FDWT, and the DOE by utilizing over 30 student interns and a number of faculty in all efforts. It brought real-world wind turbine experience into the classroom to further enhance the Green Engineering Program at WNEU. It also provided on-the-job training to many students, improving their future employment opportunities, while also providing valuable information to further advance FDWT's mixer-ejector wind turbine technology, creating opportunities for future project innovation and job creation.

  9. Effect of tempe waste on excreation of purine derivatives and microbial–N supply in lactating Etawah crossbred goats

    Directory of Open Access Journals (Sweden)

    D.A Astuti

    2002-10-01

    Full Text Available The aim of this study was to evaluate excretion of purine derivatives and microbial–N supply in lactating Etawah crossbred goats fed with fermented soybean waste. Sixteen first lactating goats were randomly allotted into four dietary treatment groups that received 50% king grass plus R1: 50% concentrate, R2: 25% concentrate and 25% fresh tempe waste, R3: 25% concentrate and 25% fermented tempe waste, and R4: 25% concentrate and 25% gelatinizing of liquid tempe waste. Fermented tempe waste was made by fermentation of tempe waste (seed content of soybean using Aspergillus niger, while for the gellatinizing of liquid tempe waste was made by gelatinized with maize flour. Protein balance studies were conducted during two week trial and at the end of the research. Urinary protein and purine derivatives were collected for analysis. Microbial–N supply was calculated from purine derivatives excretion. Results showed that nitrogen consumptions were significantly different between R4 and three other treatments and apparent digestible nitrogen in R3 were higher than that of R4 (P<0.05. The nitrogen retention in R1 and R3 were higher than that of R2 and R4. Urinary purine derivatives in this study showed that allantoin, xanthine and hypoxanthine in R3 were higher than that of R4, while R1 and R2 were the same and the highest uric acid excretion and total purine derivatives were observed in R3. Microbial–N supply were significantly different between all treatments where R3 was the highest. This research concluded that fermented soybean waste had the highest total purine derivatives excretion and microbial–N supply to the lactating Etawah crossbred goats.

  10. Au fil du temps. Une infrastructure évolutive dans un espace vert préservé à Fribourg

    OpenAIRE

    Ruffieux, Jessica

    2016-01-01

    La prise de conscience des enjeux environnementaux et l'accélération continue des changements sociétaux questionnent les modalités actuelles de production du bâti. Avec le développement des technologies, notre espace est devenu de plus en plus virtuel, nous faisant perdre le lien avec notre environnement direct; nous vivons la majorité du temps à l'intérieur, que ce soit pour nous déplacer, habiter ou travailler. Pour répondre à ces enjeux, le projet Au fil du temps propose une infrastructure...

  11. Gas turbine engine turbine blade damaging estimate in maintenance

    Directory of Open Access Journals (Sweden)

    Ель-Хожайрі Хусейн

    2004-01-01

    Full Text Available  The factors determining character and intensity of corrosive damages of gas turbine blades are analyzed in the article. The classification of detrimental impurities polluting gas turbine airflow duct and injuring blade erosion damages are given. Common features of the method of turbine blade corrosive damage estimation are shown in the article.

  12. Wind turbine noise diagnostics

    International Nuclear Information System (INIS)

    Richarz, W.; Richarz, H.

    2009-01-01

    This presentation proposed a self-consistent model for broad-band noise emitted from modern wind turbines. The simple source model was consistent with the physics of sound generation and considered the unique features of wind turbines. Although the acoustics of wind turbines are similar to those of conventional propellers, the dimensions of wind turbines pose unique challenges in diagnosing noise emission. The general features of the sound field were deduced. Source motion and source directivity appear to be responsible for amplitude variations. The amplitude modulation is likely to make wind-turbine noise more audible, and may be partly responsible for annoyance that has been reported in the literature. Acoustic array data suggests that broad-band noise is emitted predominantly during the downward sweep of each rotor blade. Source motion and source directivity account for the observed pattern. Rotor-tower interaction effects are of lesser importance. Predicted amplitude modulation ranges from 1 dB to 6dB. 2 refs., 9 figs.

  13. Deflector plants turbine aeration

    International Nuclear Information System (INIS)

    Miller, D.E.; Sheppard, A.R.; Widener, D.W.

    1991-01-01

    Water quality requirements have become a focal point in recent re-licensing of hydroelectric projects. The Federal Energy Regulatory Commission has significantly increased the relevance of license conditions to insure that turbine discharges meet state or other specific criteria for dissolved oxygen (D.O.). Due to naturally occurring depletion of D.O. at increased depths in large reservoirs, water withdrawn from this strata may result in unacceptably low levels of D.O. Different researchers have evaluated various methods of improving D.O. content in hydro turbine discharges, including; diffusers, weirs, oxygen injection, and variations of turbine venting. The authors describe an approach called deflector plate turbine aeration. This computer based, engineered approach allows systems to be evaluated, designed, and installed with predictable performance and costs. Many experts in this field now agree that, to the extent practical, turbine venting offers the most dependable, maintenance free, and cost effective solution to the low D.O. problem. The approach presented in this paper has resulted in proven results

  14. Floating wind turbine system

    Science.gov (United States)

    Viterna, Larry A. (Inventor)

    2009-01-01

    A floating wind turbine system with a tower structure that includes at least one stability arm extending therefrom and that is anchored to the sea floor with a rotatable position retention device that facilitates deep water installations. Variable buoyancy for the wind turbine system is provided by buoyancy chambers that are integral to the tower itself as well as the stability arm. Pumps are included for adjusting the buoyancy as an aid in system transport, installation, repair and removal. The wind turbine rotor is located downwind of the tower structure to allow the wind turbine to follow the wind direction without an active yaw drive system. The support tower and stability arm structure is designed to balance tension in the tether with buoyancy, gravity and wind forces in such a way that the top of the support tower leans downwind, providing a large clearance between the support tower and the rotor blade tips. This large clearance facilitates the use of articulated rotor hubs to reduced damaging structural dynamic loads. Major components of the turbine can be assembled at the shore and transported to an offshore installation site.

  15. Max plus at work modeling and analysis of synchronized systems a course on max-plus algebra and its applications

    CERN Document Server

    Heidergott, Bernd; van der Woude, Jacob

    2014-01-01

    Trains pull into a railroad station and must wait for each other before leaving again in order to let passengers change trains. How do mathematicians then calculate a railroad timetable that accurately reflects their comings and goings? One approach is to use max-plus algebra, a framework used to model Discrete Event Systems, which are well suited to describe the ordering and timing of events. This is the first textbook on max-plus algebra, providing a concise and self-contained introduction to the topic. Applications of max-plus algebra abound in the world around us. Traffic systems, compu

  16. Turg Tallinnas = A market for Tallinn / Max Rink

    Index Scriptorium Estoniae

    Rink, Max

    2007-01-01

    Hollandi arhitektuurikoolide lõputööde preemia Archiprix võitis 2007. a. Max Rink Delfti Tehnikaülikoolist Tallinna Balti jaama turu asemele kavandatud mitmefunktsioonilise turuhoone projektiga "Maja-turg". Juhendaja Klaske Havik

  17. Digital logic circuit design with ALTERA MAX+PLUS II

    International Nuclear Information System (INIS)

    Lee, Seung Ho; Park, Yong Su; Park, Gun Jong; Lee, Ju Heon

    2006-09-01

    This book is composed of five parts. The first part has introduction of ALTERA MAX+PLUS II and graphic editor, text editor, compiler, waveform editor simulator and timing analyzer of it. The second part is about direction of digital logic circuit design with training kit. The third part has grammar and practice of VHDL in ALTERA MAX+PLUS II including example and history of VHDL. The fourth part shows the design example of digital logic circuit by VHDL of ALTERA MAX+PLUS II which lists designs of adder and subtractor, code converter, counter, state machine and LCD module. The last part explains design example of digital logic circuit by graphic editor in ALTERA MAX+PLUS II.

  18. Projekti Min-E-Max kohtumine Saksamaal / Katrin Arge

    Index Scriptorium Estoniae

    Arge, Katrin

    2005-01-01

    Oktoobri keskel toimus Lõuna-Saksamaa väikelinnas Oberderdingenis Hispaania, Portugali, Ungari, Leedu, Eesti ja Saksamaa õpetajate kohtumine seoses Euroopa Liidu poolt rahastatava Comenius1 projektiga Min-E-Max (minimum energy input maximum output)

  19. Availability and Usability of BHO Encounter Data in MAX 2009

    Data.gov (United States)

    U.S. Department of Health & Human Services — Availability and Usability of Behavioral Health Organization Encounter Data in MAX 2009, published in Volume 4, Issue 2 of Medicare and Medicaid Research Review,...

  20. Maks Kaur : "Uverenno idti dalshe!" / Max Kaur ; interv. Viktor Volohhov

    Index Scriptorium Estoniae

    Kaur, Max, 1969-

    2006-01-01

    Noor ja poliitikas aktiivselt tegev olnud Max Kaur jätkab Majandus- ja juhtimisinstituudi prorektorina. Senisest poliitilisest tegevusest, vene kultuuri arengust ja probleemidest Eestis, poliitikas osalejate keskmise vanuse langusest, isiklikest plaanidest

  1. Efficient production of transgenic soybean (Glycine max [L] Merrill ...

    African Journals Online (AJOL)

    Efficient production of transgenic soybean (Glycine max [L] Merrill) plants mediated via whisker-supersonic (WSS) method. MM Khalafalla, HA El-Shemy, SM Rahman, M Teraishi, H Hasegawa, T Terakawa, M Ishimoto ...

  2. ELA-max: A new topical lidocaine formulation.

    Science.gov (United States)

    Goldman, Ran D

    2004-05-01

    To evaluate the role of a new formulation of lidocaine (ELA-max) in local anesthesia in children and compare it with the eutectic mixture of local anesthetics (EMLA). Relevant literature was identified by a MEDLINE search (1966-November 2003) using the search terms ELA-max and EMLA. Bibliographies of selected articles were also examined to include all relevant investigations. The product manufacturer was contacted for inclusion of the most recent data available. Topical anesthesia in children is clinically challenging. ELA-max has been shown to be as effective as EMLA for venipuncture in children, but with faster onset. Adverse effects, such as transient blanching with redness and erythema, have been reported. Further investigation is needed to determine the effectiveness of ELA-max on other painful procedures in children, as well as its safety.

  3. Wind turbine control and monitoring

    CERN Document Server

    Luo, Ningsu; Acho, Leonardo

    2014-01-01

    Maximizing reader insights into the latest technical developments and trends involving wind turbine control and monitoring, fault diagnosis, and wind power systems, 'Wind Turbine Control and Monitoring' presents an accessible and straightforward introduction to wind turbines, but also includes an in-depth analysis incorporating illustrations, tables and examples on how to use wind turbine modeling and simulation software.   Featuring analysis from leading experts and researchers in the field, the book provides new understanding, methodologies and algorithms of control and monitoring, comput

  4. Wind Turbine With Concentric Ducts

    Science.gov (United States)

    Muhonen, A. J.

    1983-01-01

    Wind Turbine device is relatively compact and efficient. Converging inner and outer ducts increase pressure difference across blades of wind turbine. Turbine shaft drives alternator housed inside exit cone. Suitable for installation on such existing structures as water towers, barns, houses, and commercial buildings.

  5. Wind turbine spoiler

    Science.gov (United States)

    Sullivan, W.N.

    An aerodynamic spoiler system for a vertical axis wind turbine includes spoilers on the blades initially stored near the rotor axis to minimize drag. A solenoid latch adjacent the central support tower releases the spoilers and centrifugal force causes the spoilers to move up the turbine blades away from the rotor axis, thereby producing a braking effect and actual slowing of the associated wind turbine, if desired. The spoiler system can also be used as an infinitely variable power control by regulated movement of the spoilers on the blades over the range between the undeployed and fully deployed positions. This is done by the use of a suitable powered reel and cable located at the rotor tower to move the spoilers.

  6. Steam turbine installations

    International Nuclear Information System (INIS)

    Bainbridge, A.

    1976-01-01

    The object of the arrangement described is to enable raising steam for driving steam turbines in a way suited to operating with liquid metals, such as Na, as heat transfer medium. A preheated water feed, in heat transfer relationship with the liquid metals, is passed through evaporator and superheater stages, and the superheated steam is supplied to the highest pressure stage of the steam turbine arrangement. Steam extracted intermediate the evaporator and superheater stages is employed to provide reheat for the lower pressure stage of the steam turbine. Only a major portion of the preheated water feed may be evaporated and this portion separated and supplied to the superheater stage. The feature of 'steam to steam' reheat avoids a second liquid metal heat transfer and hence represents a simplification. It also reduces the hazard associated with possible steam-liquid metal contact. (U.K.)

  7. Hydro turbines: An introduction

    International Nuclear Information System (INIS)

    Gordon, J.L.

    1993-01-01

    The various types of hydraulic turbines currently used in hydroelectric power plants are described. The descriptions are intended for use by non-engineers who are concerned with fish passage and fish mortality at a hydro power facility. Terminology used in the hydro industry is explained. Since the extent of cavitation is one of the factors affecting mortality rates of fish passing through hydraulic turbines, an equation is introduced which measures the extent of cavitation likely to be experienced in a turbine. An example of how the cavitation index can be calculated is provided for two typical power plants. The relation between certain parameters of power plant operation and the extent of cavitation, and therefore of fish mortality, is illustrated. 2 refs., 14 figs

  8. Variable stator radial turbine

    Science.gov (United States)

    Rogo, C.; Hajek, T.; Chen, A. G.

    1984-01-01

    A radial turbine stage with a variable area nozzle was investigated. A high work capacity turbine design with a known high performance base was modified to accept a fixed vane stagger angle moveable sidewall nozzle. The nozzle area was varied by moving the forward and rearward sidewalls. Diffusing and accelerating rotor inlet ramps were evaluated in combinations with hub and shroud rotor exit rings. Performance of contoured sidewalls and the location of the sidewall split line with respect to the rotor inlet was compared to the baseline. Performance and rotor exit survey data are presented for 31 different geometries. Detail survey data at the nozzle exit are given in contour plot format for five configurations. A data base is provided for a variable geometry concept that is a viable alternative to the more common pivoted vane variable geometry radial turbine.

  9. Noise from wind turbines

    International Nuclear Information System (INIS)

    Andersen, B.; Jakobsen, J.

    1992-11-01

    Based on a previous project concerning the calculation of the amount of noise emanating from wind turbine arrays, this one examines the subject further by investigating whether there could be significant differences in the amount of noise made by individual wind turbines in an array, and whether the noise is transmitted in varying directions - so that when it is carried in the same direction as the wind blows it would appear to be louder. The aim was also to determine whether the previously used method of calculation lacked precision. It was found that differences in noise niveaux related to individual wind turbines were insignificant and that noise was not so loud when it was not borne in the direction of the wind. It was necessary to change the method of calculation as reckoning should include the influence of the terrain, wind velocity and distance. The measuring and calculation methods are exemplified and the resulting measurements are presented in detail. (AB)

  10. Aeroservoelasticity of Wind Turbines

    DEFF Research Database (Denmark)

    Kallesøe, Bjarne Skovmose

    2007-01-01

    This thesis deals with the fundamental aeroelastic interaction between structural motion, Pitch action and control for a wind turbine blade. As wind turbines become larger, the interaction between pitch action, blade motion, aerodynamic forces, and control become even more important to understand......, and furthermore linear and therefore suitable for control design. The development of the primary aeroelastic blade model is divided into four steps: 1) Nonlinear partial differential equations (PDEs) of structural blade motion are derived together with equations of pitch action and rotor speed; the individual...... to a 2D blade section model, and it can be used instead of this in many applications, giving a transparent connection to a real wind turbine blade. In this work the aeroelastic blade model is used to analyze interaction between pitch action, blade motion and wind speed variations. Furthermore the model...

  11. Wind Turbine Acoustics

    Science.gov (United States)

    Hubbard, Harvey H.; Shepherd, Kevin P.

    2009-01-01

    Wind turbine generators, ranging in size from a few kilowatts to several megawatts, are producing electricity both singly and in wind power stations that encompass hundreds of machines. Many installations are in uninhabited areas far from established residences, and therefore there are no apparent environmental impacts in terms of noise. There is, however, the potential for situations in which the radiated noise can be heard by residents of adjacent neighborhoods, particularly those neighborhoods with low ambient noise levels. A widely publicized incident of this nature occurred with the operation of the experimental Mod-1 2-MW wind turbine, which is described in detail elsewhere. Pioneering studies which were conducted at the Mod-1 site on the causes and remedies of noise from wind turbines form the foundation of much of the technology described in this chapter.

  12. Micro turbines on gas

    International Nuclear Information System (INIS)

    Kotevski, Darko

    2003-01-01

    Microturbines are small gas turbine engines that drive a generator with sizes ranging from 30-350 kW. Although similar in function to bigger gas turbines, their simple radial flow turbine and high-speed generator offer better performance, greater reliability, longer service intervals, reduced maintenance lower emission and lower noise. Microturbines can generate power continuously and very economically to reduce electricity costs or they can be operated selectively for peak shaving. These benefits are further enhanced by the economics of using the microturbine's waste heat for hot water needs or other heating applications. That is why on-site microturbine power is widely used for independent production of electricity and heat in industrial and commercial facilities, hotels, hospitals, office buildings, residential buildings etc. (Original)

  13. Novel Approaches to Enhance Mobile WiMAX Security

    Directory of Open Access Journals (Sweden)

    Taeshik Shon

    2010-01-01

    Full Text Available The IEEE 802.16 Working Group on Broadband Wireless Access Standards released IEEE 802.16-2004 which is a standardized technology for supporting broadband and wireless communication with fixed and nomadic access. After the IEEE 802.16-2004 standard, a new advanced and revised standard was released as the IEEE 802.16e-2005 amendment which is foundation of Mobile WiMAX network supporting handover and roaming capabilities. In the area of security aspects, compared to IEEE 802.16-2004, IEEE 802.16e, called Mobile WiMAX, adopts improved security architecture—PKMv2 which includes EAP authentication, AES-based authenticated encryption, and CMAC or HMAC message protection. However, there is no guarantee that PKMv2-based Mobile WiMAX network will not have security flaws. In this paper, we investigate the current Mobile WiMAX security architecture focusing mainly on pointing out new security vulnerabilities such as a disclosure of security context in network entry, a lack of secure communication in network domain, and a necessity of efficient handover supporting mutual authentication. Based on the investigation results, we propose a novel Mobile WiMAX security architecture, called RObust and Secure MobilE WiMAX (ROSMEX, to prevent the new security vulnerabilities.

  14. PENINGKATAN AKTIVITAS ANTIOKSIDAN SUPEROKSIDA DISMUTASE PADA TIKUS HIPERGLIKEMI DENGAN ASUPAN TEMPE KORO BENGUK (Mucuna pruriens L. (Increased Superoxide Dismutase Antioxidant Activity in Hyperglycemia Rat with Velvet Bean (Mucuna pruriens L.Tempe Diet

    Directory of Open Access Journals (Sweden)

    Christiana Retnaningsih

    2013-08-01

    Hiperglikemi menimbulkan stress oksidatif dan patogenesis komplikasi diabetes. Untuk menurunkan hiperglikemi perlu dipertimbangkan kombinasi antara pengobatan modern dengan terapi tardisional melalui pangan fungsional guna mengurangi kerusakan sel beta pankreas. Bahan pangan yang memiliki potensi fungsional tersebut adalah biji koro benguk (Mucuna pruriens L yang difermentasi menjadi bentuk tempe. Tujuan dari penelitian ini adalah untuk membuktikan pengaruh asupan tempe koro benguk terhadap kadar glukosa darah dan status antioksidan serum pada tikus hiperglikemi. Penelitian ini menggunakan 50 ekor tikus jantan jenis Sprague Dawley umur 2-3 bulan. Tikus dibagi ke dalam 5 kelompok dengan cara random alokasi. Kelompok 1 kontrol negatif (C-, kelompok 2 kontrol positif (C+, kelompok 3 adalah X1-TK10%, kelompok 4 adalah X2-TK10%, kelompok 5 adalah X3-TK10%. Tikus kelompok C+, X1, X2, X3 diinduksi streptozotocin (STZ dengan dosis 40 mg/kg BB secara inta peritoneal. Penelitian dilakukan selama 30 hari. Data dianalisis dengan Paired T test, One way Anova dan dilanjutkan dengan Uji Wilayah Ganda Duncan. Hasil penelitian menunjukkan bahwa STZ meningkatkan kadar glukosa darah dan menurunkan aktivitas antioksidan SOD serum. Hasil analisis in vivo pada tkus menunjukkan bahwa asupan tempe koro benguk menurunkan kadar glukosa darah dan meningkatkan aktivitas antioksidan SOD serum. Kata kunci: Tempe koro benguk, antioksidan, hiperglikemi

  15. Steam generators, turbines, and condensers. Volume six

    International Nuclear Information System (INIS)

    Anon.

    1986-01-01

    Volume six covers steam generators (How steam is generated, steam generation in a PWR, vertical U-tube steam generators, once-through steam generators, how much steam do steam generators make?), turbines (basic turbine principles, impulse turbines, reaction turbines, turbine stages, turbine arrangements, turbine steam flow, steam admission to turbines, turbine seals and supports, turbine oil system, generators), and condensers (need for condensers, basic condenser principles, condenser arrangements, heat transfer in condensers, air removal from condensers, circulating water system, heat loss to the circulating water system, factors affecting condenser performance, condenser auxiliaries)

  16. Offshore Wind Turbine Design

    DEFF Research Database (Denmark)

    Frandsen, Sten; Hansen, Erik Asp; Ibsen, Lars Bo

    2006-01-01

    Current offshore wind turbine design methods have matured to a 1st generation state, manifested in the draft of a possible standard, IEC 61400-3 (2005). It is now time to investigate the possibilities of improving existing methods. To do so in an efficient manner a clear identification of the most...... important uncertainty drivers specific for offshore wind turbine design loads is required. Describing the initial efforts in a Danish research project, the paper points to focal points for research and development. These are mainly: soil-structure interaction, improved modelling of wave loads from deep...

  17. Vertical axis wind turbines

    Science.gov (United States)

    Krivcov, Vladimir [Miass, RU; Krivospitski, Vladimir [Miass, RU; Maksimov, Vasili [Miass, RU; Halstead, Richard [Rohnert Park, CA; Grahov, Jurij [Miass, RU

    2011-03-08

    A vertical axis wind turbine is described. The wind turbine can include a top ring, a middle ring and a lower ring, wherein a plurality of vertical airfoils are disposed between the rings. For example, three vertical airfoils can be attached between the upper ring and the middle ring. In addition, three more vertical airfoils can be attached between the lower ring and the middle ring. When wind contacts the vertically arranged airfoils the rings begin to spin. By connecting the rings to a center pole which spins an alternator, electricity can be generated from wind.

  18. Vertical axis wind turbine

    International Nuclear Information System (INIS)

    Obretenov, V.; Tsalov, T.; Chakarov, T.

    2012-01-01

    In recent years, the interest in wind turbines with vertical axis noticeably increased. They have some important advantages: low cost, relatively simple structure, reliable packaging system of wind aggregate long period during which require no maintenance, low noise, independence of wind direction, etc.. The relatively low efficiency, however, makes them applicable mainly for small facilities. The work presents a methodology and software for approximately aerodynamic design of wind turbines of this type, and also analyzed the possibility of improving the efficiency of their workflow

  19. ADVANCED TURBINE SYSTEMS PROGRAM

    Energy Technology Data Exchange (ETDEWEB)

    Gregory Gaul

    2004-04-21

    Natural gas combustion turbines are rapidly becoming the primary technology of choice for generating electricity. At least half of the new generating capacity added in the US over the next twenty years will be combustion turbine systems. The Department of Energy has cosponsored with Siemens Westinghouse, a program to maintain the technology lead in gas turbine systems. The very ambitious eight year program was designed to demonstrate a highly efficient and commercially acceptable power plant, with the ability to fire a wide range of fuels. The main goal of the Advanced Turbine Systems (ATS) Program was to develop ultra-high efficiency, environmentally superior and cost effective competitive gas turbine systems for base load application in utility, independent power producer and industrial markets. Performance targets were focused on natural gas as a fuel and included: System efficiency that exceeds 60% (lower heating value basis); Less than 10 ppmv NO{sub x} emissions without the use of post combustion controls; Busbar electricity that are less than 10% of state of the art systems; Reliability-Availability-Maintainability (RAM) equivalent to current systems; Water consumption minimized to levels consistent with cost and efficiency goals; and Commercial systems by the year 2000. In a parallel effort, the program was to focus on adapting the ATS engine to coal-derived or biomass fuels. In Phase 1 of the ATS Program, preliminary investigators on different gas turbine cycles demonstrated that net plant LHV based efficiency greater than 60% was achievable. In Phase 2 the more promising cycles were evaluated in greater detail and the closed-loop steam-cooled combined cycle was selected for development because it offered the best solution with least risk for achieving the ATS Program goals for plant efficiency, emissions, cost of electricity and RAM. Phase 2 also involved conceptual ATS engine and plant design and technology developments in aerodynamics, sealing

  20. Multiple piece turbine airfoil

    Science.gov (United States)

    Kimmel, Keith D; Wilson, Jr., Jack W.

    2010-11-02

    A turbine airfoil, such as a rotor blade or a stator vane, for a gas turbine engine, the airfoil formed as a shell and spar construction with a plurality of dog bone struts each mounted within openings formed within the shell and spar to allow for relative motion between the spar and shell in the airfoil chordwise direction while also forming a seal between adjacent cooling channels. The struts provide the seal as well as prevent bulging of the shell from the spar due to the cooling air pressure.

  1. Aerodynamics of wind turbines

    CERN Document Server

    Hansen, Martin O L

    2015-01-01

    Aerodynamics of Wind Turbines is the established essential text for the fundamental solutions to efficient wind turbine design. Now in its third edition, it has been substantially updated with respect to structural dynamics and control. The new control chapter now includes details on how to design a classical pitch and torque regulator to control rotational speed and power, while the section on structural dynamics has been extended with a simplified mechanical system explaining the phenomena of forward and backward whirling modes. Readers will also benefit from a new chapter on Vertical Axis W

  2. Ceramic gas turbine shroud

    Science.gov (United States)

    Shi, Jun; Green, Kevin E.

    2014-07-22

    An example gas turbine engine shroud includes a first annular ceramic wall having an inner side for resisting high temperature turbine engine gasses and an outer side with a plurality of radial slots. A second annular metallic wall is positioned radially outwardly of and enclosing the first annular ceramic wall and has a plurality of tabs in communication with the slot of the first annular ceramic wall. The tabs of the second annular metallic wall and slots of the first annular ceramic wall are in communication such that the first annular ceramic wall and second annular metallic wall are affixed.

  3. Max Jakobson : Vene ohtu täna veel pole / Max Jakobson ; interv. Vallo Toomet, Urmet Kook, Kaarel Tarand

    Index Scriptorium Estoniae

    Jakobson, Max, 1923-2013

    2003-01-01

    Balti riikide NATOga liitumise mõjust julgeolekule Läänemere regioonis, Euroopa Liidu kaitsepoliitikast ning Venemaa ja islamiterrorismi ohust julgeolekule. Vt. samas: Toomas Hiio ülevaade Max Jakobsoni elust ja tegevusest

  4. Ford C-Max plug-in hybrid; Ford C-Max mit Plug-in-Hybridtechnik

    Energy Technology Data Exchange (ETDEWEB)

    Schamel, Andreas; D' Annunzio, Julie; Iorio, Rob [Ford Motor Company, Dearborn, MI (United States); Schmitz, Peter [Ford-Forschungszentrum Aachen GmbH, Aachen (Germany)

    2013-03-01

    Ford provides consumers a broad choice of electrified vehicles globally, including full hybrids, plug-in hybrids and all-electric vehicles. The all-new 2013 model year C-Max Energi Plug-in Hybrid utilises the third generation of Ford hybrid technology. This article discusses the hybrid powersplit architecture and components, as well as the charging capability and human-machine interfaces, used in the C-Max Energi Plug-In Hybrid. (orig.)

  5. TEMP: a computer code to calculate fuel pin temperatures during a transient

    International Nuclear Information System (INIS)

    Bard, F.E.; Christensen, B.Y.; Gneiting, B.C.

    1980-04-01

    The computer code TEMP calculates fuel pin temperatures during a transient. It was developed to accommodate temperature calculations in any system of axi-symmetric concentric cylinders. When used to calculate fuel pin temperatures, the code will handle a fuel pin as simple as a solid cylinder or as complex as a central void surrounded by fuel that is broken into three regions by two circumferential cracks. Any fuel situation between these two extremes can be analyzed along with additional cladding, heat sink, coolant or capsule regions surrounding the fuel. The one-region version of the code accurately calculates the solution to two problems having closed-form solutions. The code uses an implicit method, an explicit method and a Crank-Nicolson (implicit-explicit) method

  6. Poema en prosa y mundos especulativos: en torno a Les Chasseurs du temps de Daniel Walther

    Directory of Open Access Journals (Sweden)

    Mariano Martín Rodríguez

    2016-04-01

    Full Text Available The prose poem has traditionally been considered above all a lyrical genre. Never-theless, there are short fictions showing the main features of the prose poem, such as brevity, intensity, autonomy, importance of connotation, visionary character and, above all, the dominance of description. The fic-tional prose poem gives shape to an imagi-nary world which is poetically described, rather than narrated. The fictional character of this kind of prose poem is especially clear when what is described is a future reality, as it is the case in Stéphane Mallarmé’s «Le Phénomène futur» and in later series of prose poems which create prospective uni-verses. Among them, the series collected by Daniel Walther in 2010 under the title of Les Chasseurs du temps stands out for its mysterious force, its fictional coherence and the beauty of its images.

  7. Penelitian pengaruh pembungkusan plastik terhadap kualitas tempe kedele dengan variasi jenis plastik dan lobang plastik

    Directory of Open Access Journals (Sweden)

    C. Yuwono Sumasto

    1998-06-01

    Full Text Available This aim of research is to find out the plastic package effects the quality soy tempeh which use comparison leaves package. The objective of kinds and holes of plastic for quality tempeh, it has two variables these are kinds of plastics each polypropylene (PP and polyethylene (PE with hole variation of plastic are 20,25 and 30 each size number was 12 cm x 24 cm. Result of the research shown kinds and holes of plastic is not to take effect water and ash contain in tempeh. Testing laboratory result shown, water and ash contain is not to take effect by variable of the object research whereas protein contain in soy tempeh with plastic package is not fulfills specification SII 0271-80 “Kulalitas Tempe Kedele” min 20%, whereas protein contain of tempeh with leave package is result 24.281%.

  8. Spectroscopie résolue en temps par continuum femtoseconde Applications en neurobiologie

    Science.gov (United States)

    Ramstein, S.; Mottin, S.

    2003-06-01

    La spectroscopie résolue en temps utilisant un laser blanc femtoseconde est appliquée à la mesure in vivo des principaux absorbeurs du cerveau. Après génération adéquate du continuum de lumière blanche femtoseconde (50mW/[580-756nm] à 1Hz), cette source se propage dans la calvaria, les méninges et le cortex chez le rat anesthésié. La transmission est étudiée sur 7mm de distance entre l'impact laser et la fibre optique de collection. Le signal transmis est analysé dans la fenêtre 580-760nm, par un spectromètre couplé à une caméra à balayage de fente permettant la décorrélation de l'absorption et de la diffusion.

  9. School Desegregation in Tempe, Arizona: A Staff Report of the U.S. Commission on Civil Rights.

    Science.gov (United States)

    Commission on Civil Rights, Washington, DC.

    This is a report on school desegregation in Tempe, Arizona. The desegregation plan focused on the Guadalupe community, specifically, the Veda B. Frank Elementary School. In 1972-73 this school had a minority student enrollment of 92%, of which 90% were Mexican Americans. The reassignment of students required by the plan affected Mexican American…

  10. Etude de l'impact de la variation de la température sur les activités ...

    African Journals Online (AJOL)

    Etude de l'impact de la variation de la température sur les activités microbiennes : application à une population de Listeria monocytogenes CIP 7831, Listeria monocytogenes Scott A CIP 103575 et Escherichia coli ATCC 25922.

  11. 76 FR 66328 - Callaway Golf Ball Operations, Inc., Including On-Site Leased Workers From Reliable Temp Services...

    Science.gov (United States)

    2011-10-26

    ... DEPARTMENT OF LABOR Employment and Training Administration [TA-W-80,110] Callaway Golf Ball... Golf Ball Operations, Inc., including on-site leased workers from Reliable Temp Services, Inc., and... production of golf balls. The notice was published in the Federal Register on July 8, 2011 (76 FR 40401). At...

  12. Mechanical (turbines and auxiliary equipment)

    CERN Document Server

    Sherry, A; Cruddace, AE

    2013-01-01

    Modern Power Station Practice, Volume 3: Mechanical (Turbines and Auxiliary Equipment) focuses on the development of turbines and auxiliary equipment used in power stations in Great Britain. Topics covered include thermodynamics and steam turbine theory; turbine auxiliary systems such as lubrication systems, feed water heating systems, and the condenser and cooling water plants. Miscellaneous station services, and pipework in power plants are also described. This book is comprised of five chapters and begins with an overview of thermodynamics and steam turbine theory, paying particular attenti

  13. FORMULASI SOSIS ANALOG SUMBER PROTEIN BERBASIS TEMPE DAN JAMUR TIRAM SEBAGAI PANGAN FUNGSIONAL KAYA SERAT PANGAN

    Directory of Open Access Journals (Sweden)

    Dewi Pratiwi Ambari

    2014-08-01

    Full Text Available ABSTRACTThe purpose of this study was to develop formula of sausage based on tempeh flour with the addition of oyster mushroom (Pleurotus ostreatus as functional food rich in protein and dietary fiber as healthy snack product for children. Sausage was formulated by addition of oyster mushroom used trial and error method. A selected formula was determined based on semi trained panelist preference. Acceptance of the selected sausage formula was examine by children using hedonic test. The contribution of protein and dietary fiber contained in sausage per serving size (50 g was calculated for general consumer. The accepted sausage with 20% oyster mushroom addition contained 24% of protein and can be claimed as source of protein and 7.64 g of dietary fiber per 100 g and can be claimed rich in dietary fiber.Keywords: dietary fiber, oyster mushroom, protein, sausage, tempehABSTRAKTujuan penelitian ini adalah untuk mengembangkan formula sosis berbasis tempe dengan penambahan jamur tiram sebagai pangan fungsional kaya protein dan serat pangan untuk produk camilan sehat bagi anak-anak. Sosis diformulasikan dengan penambahan jamur tiram melalui metode trial dan error. Formula terpilih ditentukan berdasarkan kesukaan panelis semi terlatih. Penerimaan sosis formula terpilih dilakukan terhadap anak-anak melalui uji hedonik. Kontribusi protein dan serat pangan pada sosis per takaran saji (50 g dihitung untuk konsumen umum. Sosis terpilih dengan penambahan 20% jamur tiram mengandung 24% protein sehingga dapat diklaim sebagai sumber protein dan 7.64 g serat pangan per 100 g sehingga dapat diklaim kaya serat pangan.Kata kunci: jamur tiram, protein, serat pangan, sosis, tempe

  14. G.M. counter and pre-determined dead time; Compteur G.M. et temps mort impose

    Energy Technology Data Exchange (ETDEWEB)

    Lamotte, R; Le Baud, P [Commissariat a l' Energie Atomique, Saclay (France).Centre d' Etudes Nucleaires

    1959-07-01

    This paper is divided into two main parts. - The first section recalls the principle on which a G.M. counter works, and examines the factors which lead to inaccuracies in counting. The concept of dead time, although simple risen associated with the counter alone, becomes complicated as soon as an electronic dead time is introduced to meet the demands of a measurement or an experiment. The resulting dead time, due to the coexistence of these dead times created by a single motivating factor, shows up as a function of certain laws of probability. From the analysis of the various cases of possible combinations, the conditions which must be fulfilled by a system with pre-determined dead time may be determined. This leads to a method for measuring the dead time of a G.M. counter, and the possibility of studying the latter under the utilisation conditions foreseen. - In the second part the principle, construction and characteristics of two systems with pre-determined dead time are discussed. To conclude, a comparison of several experimental results justifies an extension of the possibilities of a G.M. counter used in conjunction with such a system. (author) [French] Deux parties essentielles scindent cet expose. - La premiere partie rappelle le principe de fonctionnement d'un compteur G.M. et examine les facteurs d'imprecisions affectant les comptages. La notion de temps mort, simple quand elle est associee au compteur seul, se complique des qu'intervient un temps mort electronique introduit pour les besoins d'une mesure ou d'une experience. Le temps mort resultant, du a la coexistence de ces temps morts engendres par une meme cause, se manifeste en fonction de certaines lois de probabilites. L'analyse des differents cas de combinaisons possibles permet de preciser les imperatifs auxquels doit repondre un systeme a temps mort impose. Il en decoule une methode de mesure du temps mort d'un compteur G.M. et la possibilite d'etudier celui-ci dans les conditions d

  15. Sociographie d’un rapport au temps comme fondement de la culture professionnelle

    Directory of Open Access Journals (Sweden)

    Abou Ndiaye

    2007-12-01

    Full Text Available Signer un contrat de travail c’est convenir de louer à une entreprise, contre rétribution, une partie de son temps personnel. Cet usage est borné par la loi, les accords de branche et les accords d’entreprise. Mais, dans certaines conditions, pour certaines raisons et pour des motivations jugées plus ou moins personnelles, un travailleur peut faire des « gratuités » et des arrangements exorbitants au regard de la réglementation et semble-t-il, en accord avec ses propres principes et valeurs… C’est ce que nous nommons le rapport au temps. D’où, en signalant que l’emploi du temps individuel et sa rétribution constituent les principaux objets de transaction dans le monde salarial, on conçoit donc que le rapport au temps est l’élément structurant de la culture professionnelle. Celle-ci correspond à un ensemble de prescriptions et/ou de proscriptions, de manières de se comporter, d’agir… relevant a priori d’un bon sens (professionnel partagé par les membres d’un groupe professionnel. Cette culture professionnelle amalgame, englobe et transcende les cultures spécifiques d’entreprise. Chez les agents d’animation, par exemple, quel que soit l’employeur, chacun trouve « normal » de travailler dans un temps scandé et « déritualisé », haché et fragmenté, bref décalé de la temporalité sociale dominante, là où, ailleurs, dans un autre domaine d’activité, cette situation aurait été jugée inacceptable ou refusée… De même que l’animateur attend que son travail lui donne plaisir et respecte sa vie personnelle, ce qui n’est pas forcément vrai chez le salarié ordinaire.Sociography of a « culture of time » as a foundation of professional cultureThe example of sociocultural officersWorking for a company means renting to it for money a part of a personal time. This time is used according law, branch agreements and company level. But, in certain conditions, for some personal

  16. Great expectations: large wind turbines

    International Nuclear Information System (INIS)

    De Vries, E.

    2001-01-01

    This article focuses on wind turbine product development, and traces the background to wind turbines from the first generation 1.5 MW machines in 1995-6, plans for the second generation 3-5 MW class turbines to meet the expected boom in offshore wind projects, to the anticipated installation of a 4.5 MW turbine, and offshore wind projects planned for 2000-2002. The switch by the market leader Vestas to variable speed operation in 2000, the new product development and marketing strategy taken by the German Pro + Pro consultancy in their design of a 1.5 MW variable speed pitch control concept, the possible limiting of the size of turbines due to logistical difficulties, opportunities offered by air ships for large turbines, and the commissioning of offshore wind farms are discussed. Details of some 2-5 MW offshore wind turbine design specifications are tabulated

  17. Wind Turbine Blade

    DEFF Research Database (Denmark)

    2010-01-01

    The invention relates to a blade for a wind turbine, particularly to a blade that may be produced by an advanced manufacturing process for producing a blade with high quality structural components. Particularly, the structural components, which are preferably manufactured from fibre reinforced...

  18. Alcoa wind turbines

    Science.gov (United States)

    Ai, D. K.

    1979-01-01

    An overview of Alcoa's wind energy program is given with emphasis on the the development of a low cost, reliable Darrieus Vertical Axis Wind Turbine System. The design layouts and drawings for fabrication are now complete, while fabrication and installation to utilize the design are expected to begin shortly.

  19. Turbine imaging technology assessment

    Energy Technology Data Exchange (ETDEWEB)

    Moursund, R. A. [Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Carlson, T. J. [Pacific Northwest National Lab. (PNNL), Richland, WA (United States)

    2004-12-01

    The goal of this project was to identify and evaluate imaging technologies for observing juvenile fish within a Kaplan turbine, and specifically that would enable scientists to determine mechanisms of fish injury within an operating turbine unit. This report documents the opportunities and constraints for observing juvenile fish at specific locations during turbine passage. These observations were used to make modifications to dam structures and operations to improve conditions for fish passage while maintaining or improving hydropower production. The physical and hydraulic environment that fish experience as they pass through the hydroelectric plants were studied and the regions with the greatest potential for injury were defined. Biological response data were also studied to determine the probable types of injuries sustained in the turbine intake and what types of injuries are detectable with imaging technologies. The study grouped injury-causing mechanisms into two categories: fluid (pressure/cavitation, shear, turbulence) and mechanical (strike/collision, grinding/pinching, scraping). The physical constraints of the environment, together with the likely types of injuries to fish, provided the parameters needed for a rigorous imaging technology evaluation. Types of technology evaluated included both tracking and imaging systems using acoustic technologies (such as sonar and acoustic tags) and optic technologies (such as pulsed-laser videography, which is high-speed videography using a laser as the flash). Criteria for determining image data quality such as frame rate, target detectability, and resolution were used to quantify the minimum requirements of an imaging sensor.

  20. Small hydraulic turbine drives

    Science.gov (United States)

    Rostafinski, W. A.

    1970-01-01

    Turbine, driven by the fluid being pumped, requires no external controls, is completely integrated into the flow system, and has bearings which utilize the main fluid for lubrication and cooling. Torque capabilities compare favorably with those developed by positive displacement hydraulic motors.

  1. Gas turbine drives

    Energy Technology Data Exchange (ETDEWEB)

    1981-01-01

    Developments in gas turbine drives are reviewed, e.g., low weight per unit power and thrust-weight ratio, fast availability of the maximum speed, absolute resistance to cold and to droplet formation vibrationeless run, and low exhaust gas temperatures. Applications in aeronautic engineering (turbofan), power stations, marine propulsion systems, railways and road transportation vehicles are mentioned.

  2. Gas turbine electric generator

    International Nuclear Information System (INIS)

    Nemoto, Masaaki; Yuhara, Tetsuo.

    1993-01-01

    When troubles are caused to a boundary of a gas turbine electric generator, there is a danger that water as an operation medium for secondary circuits leaks to primary circuits, to stop a plant and the plant itself can not resume. Then in the present invention, helium gases are used as the operation medium not only for the primary circuits but also for the secondary circuits, to provide so-called a direct cycle gas turbine system. Further, the operation media of the primary and secondary circuits are recycled by a compressor driven by a primary circuit gas turbine, and the turbine/compressor is supported by helium gas bearings. Then, problems of leakage of oil and water from the bearings or the secondary circuits can be solved, further, the cooling device in the secondary circuit is constituted as a triple-walled tube structure by way of helium gas, to prevent direct leakage of coolants into the reactor core even if cracks are formed to pipes. (N.H.)

  3. Integrated turbine bypass system

    Energy Technology Data Exchange (ETDEWEB)

    Johnson, L.H.; Dickenson, R.J.; Parry, W.T.; Retzlaff, K.M.

    1982-07-01

    Turbine steam-flow bypasses have been used for years in various sizes and applications. Because of differing system requirements, their use has been more predominant in Europe than in the United States. Recently, some utilities and consulting engineers have been re-evaluating their need for various types of bypass operation in fossil-fuelled power plants.

  4. Floating offshore turbines

    DEFF Research Database (Denmark)

    Tande, John Olav Giæver; Merz, Karl; Schmidt Paulsen, Uwe

    2014-01-01

    metric of energy production per unit steel mass. Floating offshore wind turbines represent a promising technology. The successful operation of HyWind and WindFloat in full scale demonstrates a well advanced technology readiness level, where further development will go into refining the concepts, cost...

  5. Radial gas turbine design

    Energy Technology Data Exchange (ETDEWEB)

    Krausche, S.; Ohlsson, Johan

    1998-04-01

    The objective of this work was to develop a program dealing with design point calculations of radial turbine machinery, including both compressor and turbine, with as few input data as possible. Some simple stress calculations and turbine metal blade temperatures were also included. This program was then implanted in a German thermodynamics program, Gasturb, a program calculating design and off-design performance of gas turbines. The calculations proceed with a lot of assumptions, necessary to finish the task, concerning pressure losses, velocity distribution, blockage, etc., and have been correlated with empirical data from VAT. Most of these values could have been input data, but to prevent the user of the program from drowning in input values, they are set as default values in the program code. The output data consist of geometry, Mach numbers, predicted component efficiency etc., and a number of graphical plots of geometry and velocity triangles. For the cases examined, the error in predicted efficiency level was within {+-} 1-2% points, and quite satisfactory errors in geometrical and thermodynamic conditions were obtained Examination paper. 18 refs, 36 figs

  6. Wind turbine state estimation

    DEFF Research Database (Denmark)

    Knudsen, Torben

    2014-01-01

    Dynamic inflow is an effect which is normally not included in the models used for wind turbine control design. Therefore, potential improvement from including this effect exists. The objective in this project is to improve the methods previously developed for this and especially to verify the res...

  7. Water turbine technology for small power stations

    Science.gov (United States)

    Salovaara, T.

    1980-02-01

    The paper examines hydro-power stations and the efficiency and costs of using water turbines to run them. Attention is given to different turbine types emphasizing the use of Kaplan-turbines and runners. Hydraulic characteristics and mechanical properties of low head turbines and small turbines, constructed of fully fabricated steel plate structures, are presented.

  8. SMART POWER TURBINE

    Energy Technology Data Exchange (ETDEWEB)

    Nirm V. Nirmalan

    2003-11-01

    Gas turbines are the choice technology for high-performance power generation and are employed in both simple and combined cycle configurations around the world. The Smart Power Turbine (SPT) program has developed new technologies that are needed to further extend the performance and economic attractiveness of gas turbines for power generation. Today's power generation gas turbines control firing temperatures indirectly, by measuring the exhaust gas temperature and then mathematically calculating the peak combustor temperatures. But temperatures in the turbine hot gas path vary a great deal, making it difficult to control firing temperatures precisely enough to achieve optimal performance. Similarly, there is no current way to assess deterioration of turbine hot-gas-path components without shutting down the turbine. Consequently, maintenance and component replacements are often scheduled according to conservative design practices based on historical fleet-averaged data. Since fuel heating values vary with the prevalent natural gas fuel, the inability to measure heating value directly, with sufficient accuracy and timeliness, can lead to maintenance and operational decisions that are less than optimal. GE Global Research Center, under this Smart Power Turbine program, has developed a suite of novel sensors that would measure combustor flame temperature, online fuel lower heating value (LHV), and hot-gas-path component life directly. The feasibility of using the ratio of the integrated intensities of portions of the OH emission band to determine the specific average temperature of a premixed methane or natural-gas-fueled combustion flame was demonstrated. The temperature determined is the temperature of the plasma included in the field of view of the sensor. Two sensor types were investigated: the first used a low-resolution fiber optic spectrometer; the second was a SiC dual photodiode chip. Both methods worked. Sensitivity to flame temperature changes was

  9. Toughening Mechanisms in Nanolayered MAX Phase Ceramics—A Review

    Directory of Open Access Journals (Sweden)

    Xinhua Chen

    2017-03-01

    Full Text Available Advanced engineering and functional ceramics are sensitive to damage cracks, which delay the wide applications of these materials in various fields. Ceramic composites with enhanced fracture toughness may trigger a paradigm for design and application of the brittle components. This paper reviews the toughening mechanisms for the nanolayered MAX phase ceramics. The main toughening mechanisms for these ternary compounds were controlled by particle toughening, phase-transformation toughening and fiber-reinforced toughening, as well as texture toughening. Based on the various toughening mechanisms in MAX phase, models of SiC particles and fibers toughening Ti3SiC2 are established to predict and explain the toughening mechanisms. The modeling work provides insights and guidance to fabricate MAX phase-related composites with optimized microstructures in order to achieve the desired mechanical properties required for harsh application environments.

  10. iamxt: Max-tree toolbox for image processing and analysis

    Directory of Open Access Journals (Sweden)

    Roberto Souza

    2017-01-01

    Full Text Available The iamxt is an array-based max-tree toolbox implemented in Python using the NumPy library for array processing. It has state of the art methods for building and processing the max-tree, and a large set of visualization tools that allow to view the tree and the contents of its nodes. The array-based programming style and max-tree representation used in the toolbox make it simple to use. The intended audience of this toolbox includes mathematical morphology students and researchers that want to develop research in the field and image processing researchers that need a toolbox simple to use and easy to integrate in their applications.

  11. Max Aub, crítico e historiador literario

    Directory of Open Access Journals (Sweden)

    Francisco Caudet

    2002-11-01

    Full Text Available On the basis of similarities and dissimilarities in the consideration of authors dealt with in Discurso de la novela española contemporánea, Francisco Caudet points out Max Aub's poetics of realism stated in both his critical studies and fiction. This essay shows that Aub's contribution to the study of Mexican and Spanish literature is outstanding, not only because of his socio-historical approach, but also because of a specific perspective. This does not mean writing a "history" of literature but rather connecting creative processes. Committed during his youth to the avant-garde, Max Aub shifts after the Civil War to a type of new realistic writing. The author highlights Max Aub's activity as a critic discussing and commenting his sources. Aub's critical essays cannot be detached from his personal ideas about literary theory and practice.

  12. Max-Plus Stochastic Control and Risk-Sensitivity

    International Nuclear Information System (INIS)

    Fleming, Wendell H.; Kaise, Hidehiro; Sheu, Shuenn-Jyi

    2010-01-01

    In the Maslov idempotent probability calculus, expectations of random variables are defined so as to be linear with respect to max-plus addition and scalar multiplication. This paper considers control problems in which the objective is to minimize the max-plus expectation of some max-plus additive running cost. Such problems arise naturally as limits of some types of risk sensitive stochastic control problems. The value function is a viscosity solution to a quasivariational inequality (QVI) of dynamic programming. Equivalence of this QVI to a nonlinear parabolic PDE with discontinuous Hamiltonian is used to prove a comparison theorem for viscosity sub- and super-solutions. An example from mathematical finance is given, and an application in nonlinear H-infinity control is sketched.

  13. Turbine repair process, repaired coating, and repaired turbine component

    Science.gov (United States)

    Das, Rupak; Delvaux, John McConnell; Garcia-Crespo, Andres Jose

    2015-11-03

    A turbine repair process, a repaired coating, and a repaired turbine component are disclosed. The turbine repair process includes providing a turbine component having a higher-pressure region and a lower-pressure region, introducing particles into the higher-pressure region, and at least partially repairing an opening between the higher-pressure region and the lower-pressure region with at least one of the particles to form a repaired turbine component. The repaired coating includes a silicon material, a ceramic matrix composite material, and a repaired region having the silicon material deposited on and surrounded by the ceramic matrix composite material. The repaired turbine component a ceramic matrix composite layer and a repaired region having silicon material deposited on and surrounded by the ceramic matrix composite material.

  14. The interactional foundations of MaxEnt: Open questions

    Energy Technology Data Exchange (ETDEWEB)

    Harré, Michael S., E-mail: michael.harre@sydney.edu.au [Complex Systems Research Group, School of Civil Engineering, The University of Sydney, Sydney NSW 2006 (Australia)

    2014-12-05

    One of the simplest and potentially most useful techniques to be developed in the 20{sup th} century, a century noted for an ever more mathematically sophisticated formulation of the sciences, is that of maximising the entropy of a system in order to generate a descriptive, stochastic model of that system in closed form, often abbreviated to MaxEnt. The extension of MaxEnt to systems beyond the physics from which it originated is hampered by the fact that the microscopic physical interactions that are not justified or justifiable within the MaxEnt framework need to be falsifiably evaluated in each new field of application. It is not obvious that such justification exists for many systems in which the interactions are not directly based on physics. For example what is the justification for the use of MaxEnt in biology, climate modelling or economics? Is it simply a useful heuristic or is there some deeper connection with the foundations of some systems? Without further critical examination of the microscopic foundations that give rise to the success of the MaxEnt principle it is difficult to motivate the use of such techniques in other fields except through theoretically an practically unsatisfying analogical arguments. This article briefly presents the basis of MaxEnt principles as originally introduced in statistical mechanics in the Jaynes form, the Tsallis form and the Rényi form. Several different applications are introduced including that of ecological diversity where maximising the different diversity measures is equivalent to maximising different entropic functionals.

  15. The interactional foundations of MaxEnt: Open questions

    International Nuclear Information System (INIS)

    Harré, Michael S.

    2014-01-01

    One of the simplest and potentially most useful techniques to be developed in the 20 th century, a century noted for an ever more mathematically sophisticated formulation of the sciences, is that of maximising the entropy of a system in order to generate a descriptive, stochastic model of that system in closed form, often abbreviated to MaxEnt. The extension of MaxEnt to systems beyond the physics from which it originated is hampered by the fact that the microscopic physical interactions that are not justified or justifiable within the MaxEnt framework need to be falsifiably evaluated in each new field of application. It is not obvious that such justification exists for many systems in which the interactions are not directly based on physics. For example what is the justification for the use of MaxEnt in biology, climate modelling or economics? Is it simply a useful heuristic or is there some deeper connection with the foundations of some systems? Without further critical examination of the microscopic foundations that give rise to the success of the MaxEnt principle it is difficult to motivate the use of such techniques in other fields except through theoretically an practically unsatisfying analogical arguments. This article briefly presents the basis of MaxEnt principles as originally introduced in statistical mechanics in the Jaynes form, the Tsallis form and the Rényi form. Several different applications are introduced including that of ecological diversity where maximising the different diversity measures is equivalent to maximising different entropic functionals

  16. Beyond NextGen: AutoMax Overview and Update

    Science.gov (United States)

    Kopardekar, Parimal; Alexandrov, Natalia

    2013-01-01

    Main Message: National and Global Needs - Develop scalable airspace operations management system to accommodate increased mobility needs, emerging airspace uses, mix, future demand. Be affordable and economically viable. Sense of Urgency. Saturation (delays), emerging airspace uses, proactive development. Autonomy is Needed for Airspace Operations to Meet Future Needs. Costs, time critical decisions, mobility, scalability, limits of cognitive workload. AutoMax to Accommodate National and Global Needs. Auto: Automation, autonomy, autonomicity for airspace operations. Max: Maximizing performance of the National Airspace System. Interesting Challenges and Path Forward.

  17. Optimal resampling for the noisy OneMax problem

    OpenAIRE

    Liu, Jialin; Fairbank, Michael; Pérez-Liébana, Diego; Lucas, Simon M.

    2016-01-01

    The OneMax problem is a standard benchmark optimisation problem for a binary search space. Recent work on applying a Bandit-Based Random Mutation Hill-Climbing algorithm to the noisy OneMax Problem showed that it is important to choose a good value for the resampling number to make a careful trade off between taking more samples in order to reduce noise, and taking fewer samples to reduce the total computational cost. This paper extends that observation, by deriving an analytical expression f...

  18. Remote condition-based monitoring of turbines

    International Nuclear Information System (INIS)

    2005-01-01

    'Full text:' Turbines are one of the most expensive and critical pieces of equipment at a power generation facility. With high pressure stages that operate at up to 3500 psi and turn at speeds of up to 3600 rpm, minimal shaft misalignment, bearing wear, or other part breakdown can have catastrophic results. The results can include significant consequential damage to the turbine and other nearby equipment, extensive downtime for repair and purchase of replacement power, and potentially injury or death. Due to these enormous risks, virtually all turbines have built-in protection systems (e.g., Bentley Neveda, Vibro-Meter, etc.). These systems typically monitor peak-to-peak displacement of the shaft with proximity probes. Proximity probes monitor the relative motion between the shaft and the bearings. When the peak-to-peak motion exceeds a predetermined value (e.g., max peak of 7-10 mils) the protection device immediately sends a signal to shutdown the turbine. This may happen without warning, but more often there is an impending failure that develops over time from a degrading part or component. The part or component will almost invariably create abnormal movement in the system, resulting in a noticeable and detectable change in the equipment signatures (e.g., vibration, shaft 'orbit,' DC gap voltage). The protection devices usually provide information on the overall vibration trend of the turbine. While knowing the overall vibration within the system is a valuable metric, it has limited value as a diagnostic tool. It is the equivalent of a cardiologist having access only to a patient's pulse rate. The pulse rate may be significantly above normal, but - without more data - the cardiologist knows little more than that there is an impending problem. To better diagnose impending problems with a turbine, the following parameters are key: Vibration Trend: The vibration experienced by the shaft as a function of time; Spectrum: Displacement as a function of frequency at a

  19. Advanced Hydrogen Turbine Development

    Energy Technology Data Exchange (ETDEWEB)

    Marra, John [Siemens Energy, Inc., Orlando, FL (United States)

    2015-09-30

    Under the sponsorship of the U.S. Department of Energy (DOE) National Energy Technology Laboratories, Siemens has completed the Advanced Hydrogen Turbine Development Program to develop an advanced gas turbine for incorporation into future coal-based Integrated Gasification Combined Cycle (IGCC) plants. All the scheduled DOE Milestones were completed and significant technical progress was made in the development of new technologies and concepts. Advanced computer simulations and modeling, as well as subscale, full scale laboratory, rig and engine testing were utilized to evaluate and select concepts for further development. Program Requirements of: A 3 to 5 percentage point improvement in overall plant combined cycle efficiency when compared to the reference baseline plant; 20 to 30 percent reduction in overall plant capital cost when compared to the reference baseline plant; and NOx emissions of 2 PPM out of the stack. were all met. The program was completed on schedule and within the allotted budget

  20. Probabilistic Design of Wind Turbines

    DEFF Research Database (Denmark)

    Toft, Henrik Stensgaard

    During the last decades, wind turbines have been continuously developed with the aim of maximizing the life cycle benefits (production of electricity) minus the costs of planning, materials, installation, operation & maintenance as well as possible failure. In order to continue this development...... turbines and the central topics considered are statistical load extrapolation of extreme loads during operation and reliability assessment of wind turbine blades. Wind turbines differ from most civil engineering structures by having a control system which highly influences the loading. In the literature......, methods for estimating the extreme load-effects on a wind turbine during operation, where the control system is active, have been proposed. But these methods and thereby the estimated loads are often subjected to a significant uncertainty which influences the reliability of the wind turbine...

  1. Reliability Analysis of Wind Turbines

    DEFF Research Database (Denmark)

    Toft, Henrik Stensgaard; Sørensen, John Dalsgaard

    2008-01-01

    In order to minimise the total expected life-cycle costs of a wind turbine it is important to estimate the reliability level for all components in the wind turbine. This paper deals with reliability analysis for the tower and blades of onshore wind turbines placed in a wind farm. The limit states...... consideres are in the ultimate limit state (ULS) extreme conditions in the standstill position and extreme conditions during operating. For wind turbines, where the magnitude of the loads is influenced by the control system, the ultimate limit state can occur in both cases. In the fatigue limit state (FLS......) the reliability level for a wind turbine placed in a wind farm is considered, and wake effects from neighbouring wind turbines is taken into account. An illustrative example with calculation of the reliability for mudline bending of the tower is considered. In the example the design is determined according...

  2. Steam turbines for the future

    International Nuclear Information System (INIS)

    Trassl, W.

    1988-01-01

    Approximately 75% of the electrical energy produced in the world is generated in power plants with steam turbines (fossil and nuclear). Although gas turbines are increasingly applied in combined cycle power plants, not much will change in this matter in the future. As far as the steam parameters and the maximum unit output are concerned, a certain consolidation was noted during the past decades. The standard of development and mathematical penetration of the various steam turbine components is very high today and is applied in the entire field: For saturated steam turbines in nuclear power plants and for steam turbines without reheat, with reheat and with double reheat in fossil-fired power plants and for steam turbines with and without reheat in combined cycle power plants. (orig.) [de

  3. Wind Turbine Providing Grid Support

    DEFF Research Database (Denmark)

    2011-01-01

    changing the operation of the wind turbine to a more efficient working point.; When the rotational speed of the rotor reaches a minimum value, the wind turbine enters a recovery period to re-accelerate the rotor to the nominal rotational speed while further contributing to the stability of the electrical......A variable speed wind turbine is arranged to provide additional electrical power to counteract non-periodic disturbances in an electrical grid. A controller monitors events indicating a need to increase the electrical output power from the wind turbine to the electrical grid. The controller...... is arranged to control the wind turbine as follows: after an indicating event has been detected, the wind turbine enters an overproduction period in which the electrical output power is increased, wherein the additional electrical output power is taken from kinetic energy stored in the rotor and without...

  4. Superconducting wind turbine generators

    International Nuclear Information System (INIS)

    Abrahamsen, A B; Seiler, E; Zirngibl, T; Andersen, N H; Mijatovic, N; Traeholt, C; Pedersen, N F; Oestergaard, J; Noergaard, P B

    2010-01-01

    We have examined the potential of 10 MW superconducting direct drive generators to enter the European offshore wind power market and estimated that the production of about 1200 superconducting turbines until 2030 would correspond to 10% of the EU offshore market. The expected properties of future offshore turbines of 8 and 10 MW have been determined from an up-scaling of an existing 5 MW turbine and the necessary properties of the superconducting drive train are discussed. We have found that the absence of the gear box is the main benefit and the reduced weight and size is secondary. However, the main challenge of the superconducting direct drive technology is to prove that the reliability is superior to the alternative drive trains based on gearboxes or permanent magnets. A strategy of successive testing of superconducting direct drive trains in real wind turbines of 10 kW, 100 kW, 1 MW and 10 MW is suggested to secure the accumulation of reliability experience. Finally, the quantities of high temperature superconducting tape needed for a 10 kW and an extreme high field 10 MW generator are found to be 7.5 km and 1500 km, respectively. A more realistic estimate is 200-300 km of tape per 10 MW generator and it is concluded that the present production capacity of coated conductors must be increased by a factor of 36 by 2020, resulting in a ten times lower price of the tape in order to reach a realistic price level for the superconducting drive train.

  5. Gas turbine premixing systems

    Science.gov (United States)

    Kraemer, Gilbert Otto; Varatharajan, Balachandar; Evulet, Andrei Tristan; Yilmaz, Ertan; Lacy, Benjamin Paul

    2013-12-31

    Methods and systems are provided for premixing combustion fuel and air within gas turbines. In one embodiment, a combustor includes an upstream mixing panel configured to direct compressed air and combustion fuel through premixing zone to form a fuel-air mixture. The combustor includes a downstream mixing panel configured to mix additional combustion fuel with the fule-air mixture to form a combustion mixture.

  6. Airfoils for wind turbine

    Science.gov (United States)

    Tangler, James L.; Somers, Dan M.

    1996-01-01

    Airfoils for the blade of a wind turbine wherein each airfoil is characterized by a thickness in a range from 16%-24% and a maximum lift coefficient designed to be largely insensitive to roughness effects. The airfoils include a family of airfoils for a blade 15 to 25 meters in length, a family of airfoils for a blade 1 to 5 meters in length, and a family of airfoils for a blade 5 to 10 meters in length.

  7. Air Turbines for Wave Energy Conversion

    Directory of Open Access Journals (Sweden)

    Manabu Takao

    2012-01-01

    Full Text Available This paper describes the present status of the art on air turbines, which could be used for wave energy conversion. The air turbines included in the paper are as follows: Wells type turbines, impulse turbines, radial turbines, cross-flow turbine, and Savonius turbine. The overall performances of the turbines under irregular wave conditions, which typically occur in the sea, have been compared by numerical simulation and sea trial. As a result, under irregular wave conditions it is found that the running and starting characteristics of the impulse type turbines could be superior to those of the Wells turbine. Moreover, as the current challenge on turbine technology, the authors explain a twin-impulse turbine topology for wave energy conversion.

  8. Introduction to wind turbine aerodynamics

    CERN Document Server

    Schaffarczyk, Alois Peter

    2014-01-01

    Wind-Turbine Aerodynamics is a self-contained textbook which shows how to come from the basics of fluid mechanics to modern wind turbine blade design. It presents a fundamentals of fluid dynamics and inflow conditions, and gives a extensive introduction into theories describing the aerodynamics of wind turbines. After introducing experiments the book applies the knowledge to explore the impact on blade design.The book is an introduction for professionals and students of very varying levels.

  9. Tornado type wind turbines

    Science.gov (United States)

    Hsu, Cheng-Ting

    1984-01-01

    A tornado type wind turbine has a vertically disposed wind collecting tower with spaced apart inner and outer walls and a central bore. The upper end of the tower is open while the lower end of the structure is in communication with a wind intake chamber. An opening in the wind chamber is positioned over a turbine which is in driving communication with an electrical generator. An opening between the inner and outer walls at the lower end of the tower permits radially flowing air to enter the space between the inner and outer walls while a vertically disposed opening in the wind collecting tower permits tangentially flowing air to enter the central bore. A porous portion of the inner wall permits the radially flowing air to interact with the tangentially flowing air so as to create an intensified vortex flow which exits out of the top opening of the tower so as to create a low pressure core and thus draw air through the opening of the wind intake chamber so as to drive the turbine.

  10. Power turbine ventilation system

    Science.gov (United States)

    Wakeman, Thomas G. (Inventor); Brown, Richard W. (Inventor)

    1991-01-01

    Air control mechanism within a power turbine section of a gas turbine engine. The power turbine section includes a rotor and at least one variable pitch propulsor blade. The propulsor blade is coupled to and extends radially outwardly of the rotor. A first annular fairing is rotatable with the propulsor blade and interposed between the propulsor blade and the rotor. A second fairing is located longitudinally adjacent to the first fairing. The first fairing and the second fairing are differentially rotatable. The air control mechanism includes a platform fixedly coupled to a radially inner end of the propulsor blade. The platform is generally positioned in a first opening and a first fairing. The platform and the first fairing define an outer space. In a first position corresponding with a first propulsor blade pitch, the platform is substantially conformal with the first fairing. In a second position corresponding with the second propulsor blade pitch, an edge portion of the platform is displaced radially outwardly from the first fairing. When the blades are in the second position and rotating about the engine axis, the displacement of the edge portion with respect to the first fairing allows air to flow from the outer space to the annular cavity.

  11. Composite wind turbine towers

    Energy Technology Data Exchange (ETDEWEB)

    Polyzois, D. [Manitoba Univ., Winnipeg, MB (Canada). Dept. of Civil Engineering

    2008-07-01

    This paper discussed experiments conducted to optimized the advanced composite materials such as fiberglass reinforced plastics (FRP) used to fabricate wind turbine towers. FRP materials are used in tubular steel, lattice, guyed, and reinforced concrete towers. The towers and turbine blades are transported in segments and assembled on-site, sometimes in offshore or remote locations.The FRP composites are used to build towers with a high strength-to-weight ratio as well as to provide resistance to chemical attacks and corrosion. Use of the materials has resulted in towers that do not require heavy installation equipment. Experimental programs were conducted to verify the structural behaviour of the tower structure's individual-scaled cells as well as to evaluate the performance of multi-cell assemblies. Joint assembly designs were optimized, and a filament winding machine was used to conduct the experimental study and to test individual cells. Failure mode analyses were conducted to determine local buckling and shear rupture. Tension, compression, and shear properties of the FRP materials were tested experimentally, and data from the test were then used to develop finite element models of the composite towers as well as to obtain load deflection curves and tip oscillation data. A case study of a 750 kW wind turbine in Churchill, Manitoba was used to test the design. tabs., figs.

  12. Controls of Hydraulic Wind Turbine

    Directory of Open Access Journals (Sweden)

    Zhang Yin

    2016-01-01

    Full Text Available In this paper a hydraulic wind turbine generator system was proposed based on analysis the current wind turbines technologies. The construction and principles were introduced. The mathematical model was verified using MATLAB and AMsim. A displacement closed loop of swash plate of motor and a speed closed loop of generator were setup, a PID control is introduced to maintain a constant speed and fixed frequency at wind turbine generator. Simulation and experiment demonstrated that the system can connect grid to generate electric and enhance reliability. The control system demonstrates a high performance speed regulation and effectiveness. The results are great significant to design a new type hydraulic wind turbine system.

  13. Ceramics for Turbine Engine Applications.

    Science.gov (United States)

    1980-03-01

    permet de travailler en compression. 2 - LES TURBINES CONTRAROTATIVES Connues depuis plus de 50 ans dsns lea turbines A vapeur (A grilles radiales) lea...AD-AO87 594 ADVISORY GROUP FOR AEROSPACE RESEARCH AND DEVELOPMENT--ETC F/6 11/2 CERAMICS FOR TURBINE ENGINE APPICATIONS.(U) MAR 8G H M GURTE, J...for Turbine Engine Applications ( X.,, ~LAJ DISTRIBUTION AND AVAILABILITY Ths ai’-t~ ~ru O ACK COVER forp"~ ~So’ 8 6 0 40 NORTH ATLANTIC TREATY

  14. Advanced LP turbine blade design

    International Nuclear Information System (INIS)

    Jansen, M.; Pfeiffer, R.; Termuehlen, H.

    1990-01-01

    In the 1960's and early 1970's, the development of steam turbines for the utility industry was mainly influenced by the demand for increasing unit sizes. Nuclear plants in particular, required the design of LP turbines with large annulus areas for substantial mass and volumetric steam flows. Since then the development of more efficient LP turbines became an ongoing challenge. Extensive R and D work was performed in order to build efficient and reliable LP turbines often exposed to severe corrosion, erosion and dynamic excitation conditions. This task led to the introduction of an advanced disk-type rotor design for 1800 rpm LP turbines and the application of a more efficient, reaction-type blading for all steam turbine sections including the first stages of LP turbines. The most recent developments have resulted in an advanced design of large LP turbine blading, typically used in the last three stages of each LP turbine flow section. Development of such blading required detailed knowledge of the three dimensional, largely transonic, flow conditions of saturated steam. Also the precise assessment of blade stressing from dynamic conditions, such as speed and torsional resonance, as well as stochastic and aerodynamic excitation is of extreme importance

  15. Biomass combustion gas turbine CHP

    Energy Technology Data Exchange (ETDEWEB)

    Pritchard, D.

    2002-07-01

    This report summarises the results of a project to develop a small scale biomass combustor generating system using a biomass combustor and a micro-gas turbine indirectly fired via a high temperature heat exchanger. Details are given of the specification of commercially available micro-turbines, the manufacture of a biomass converter, the development of a mathematical model to predict the compatibility of the combustor and the heat exchanger with various compressors and turbines, and the utilisation of waste heat for the turbine exhaust.

  16. Wind Turbine Radar Cross Section

    Directory of Open Access Journals (Sweden)

    David Jenn

    2012-01-01

    Full Text Available The radar cross section (RCS of a wind turbine is a figure of merit for assessing its effect on the performance of electronic systems. In this paper, the fundamental equations for estimating the wind turbine clutter signal in radar and communication systems are presented. Methods of RCS prediction are summarized, citing their advantages and disadvantages. Bistatic and monostatic RCS patterns for two wind turbine configurations, a horizontal axis three-blade design and a vertical axis helical design, are shown. The unique electromagnetic scattering features, the effect of materials, and methods of mitigating wind turbine clutter are also discussed.

  17. Small Wind Turbine Technology Assessment

    International Nuclear Information System (INIS)

    Avia Aranda, F.; Cruz Cruz, I.

    1999-01-01

    The result of the study carried out under the scope of the ATYCA project Test Plant of Wind Systems for Isolated Applications, about the state of art of the small wind turbine technology (wind turbines with swept area smaller than 40 m 2 ) is presented. The study analyzes the collected information on 60 models of wind turbines from 23 manufacturers in the worldwide market. Data from Chinese manufacturers, that have a large participation in the total number of small wind turbines in operation, are not included, due to the unavailability of the technical information. (Author) 15 refs

  18. Small Wind Turbine Installation Compatibility Demonstration Methodology

    Science.gov (United States)

    2013-08-01

    wind turbine (HAWT) and one 2.9-kW vertical-axis wind turbine (VAWT), we planned to measure radar, acoustic and seismic, turbulence, bird and...non-issue for small turbines . The majority of studies of bat and bird interactions with wind turbines are for large turbines (BPA 2002; Whittam...et al. 2010). The majority of studies of bat and bird interactions with wind energy facil- ities are for utility-scale turbines (> 1 MW) with

  19. An optimal dynamic interval stabbing-max data structure?

    DEFF Research Database (Denmark)

    Agarwal, Pankaj Kumar; Arge, Lars; Yi, Ke

    2005-01-01

    In this paper we consider the dynamic stabbing-max problem, that is, the problem of dynamically maintaining a set S of n axis-parallel hyper-rectangles in Rd, where each rectangle s ∈ S has a weight w(s) ∈ R, so that the rectangle with the maximum weight containing a query point can be determined...

  20. Portrait Face-Off: Gilbert Stuart vs. Peter Max

    Science.gov (United States)

    Crumpecker, Cheryl

    2012-01-01

    When art classes are short and infrequent, it is always a challenge to meet required state and national standards. A unit comparing and contrasting Peter Max's Pop art portraits with the realistic style of Gilbert Stuart's presidential portraits provides an opportunity to address a huge number of these requirements. Focus can change with the age…

  1. IPP Max Planck Institute of Plasma of Physics at Garching

    International Nuclear Information System (INIS)

    1979-01-01

    The cost accounting system of the IPP Max Planck Institute of Plasma Physics at Garching is described with all details as there are cost class accounting, cost centers, cost units and resulting overall cost summary. Detailed instructions are given about the implementation of this cost accounting system into the organisational structure of the IPP. (A.N.)

  2. Elastic and Mechanical Properties of the MAX Phases

    Science.gov (United States)

    Barsoum, Michel W.; Radovic, Miladin

    2011-08-01

    The more than 60 ternary carbides and nitrides, with the general formula Mn+1AXn—where n = 1, 2, or 3; M is an early transition metal; A is an A-group element (a subset of groups 13-16); and X is C and/or N—represent a new class of layered solids, where Mn+1Xn layers are interleaved with pure A-group element layers. The growing interest in the Mn+1AXn phases lies in their unusual, and sometimes unique, set of properties that can be traced back to their layered nature and the fact that basal dislocations multiply and are mobile at room temperature. Because of their chemical and structural similarities, the MAX phases and their corresponding MX phases share many physical and chemical properties. In this paper we review our current understanding of the elastic and mechanical properties of bulk MAX phases where they differ significantly from their MX counterparts. Elastically the MAX phases are in general quite stiff and elastically isotropic. The MAX phases are relatively soft (2-8 GPa), are most readily machinable, and are damage tolerant. Some of them are also lightweight and resistant to thermal shock, oxidation, fatigue, and creep. In addition, they behave as nonlinear elastic solids, dissipating 25% of the mechanical energy during compressive cycling loading of up to 1 GPa at room temperature. At higher temperatures, they undergo a brittle-to-plastic transition, and their mechanical behavior is a strong function of deformation rate.

  3. Nuclear norm regularized convolutional Max Pos@Top machine

    KAUST Repository

    Li, Qinfeng; Zhou, Xiaofeng; Gu, Aihua; Li, Zonghua; Liang, Ru-Ze

    2016-01-01

    , named as Pos@Top. Our proposed classification model has a convolutional structure that is composed by four layers, i.e., the convolutional layer, the activation layer, the max-pooling layer and the full connection layer. In this paper, we propose

  4. Max Weber and the Iron Cage of Technology

    Science.gov (United States)

    Maley, Terry

    2004-01-01

    Max Weber is seen by mainstream social scientists as a sociologist, social theorist, and theorist of bureaucracy. In this reassessment of Weber's social science and its methodology, it is suggested that Weber can also be seen as a compelling early 20th-century critic of science and technology. The theme of technology, and Webers ambivalence about…

  5. MaxAlign: maximizing usable data in an alignment

    DEFF Research Database (Denmark)

    Oliveira, Rodrigo Gouveia; Sackett, Peter Wad; Pedersen, Anders Gorm

    2007-01-01

    Align. In this paper we also introduce a new simple measure of tree similarity, Normalized Symmetric Similarity (NSS) that we consider useful for comparing tree topologies. CONCLUSION: We demonstrate how MaxAlign is helpful in detecting misaligned or defective sequences without requiring manual inspection. We also...

  6. Multimedia programming using Max/MSP and TouchDesigner

    CERN Document Server

    Lechner, Patrik

    2014-01-01

    If you want to learn how to use Max 6 and/or TouchDesigner, or work in audio-visual real-time processing, this is the book for you. It is intended for intermediate users of both programs and can be helpful for artists, designers, musicians, VJs, and researchers. A basic understanding of audio principles is advantageous.

  7. Min-max event-triggered computation tree logic

    Indian Academy of Sciences (India)

    R. Narasimhan (Krishtel eMaging) 1461 1996 Oct 15 13:05:22

    Temporal logic model-checking (Clarkeet al1986) is one of the most popular and well studied ... Min-max CTL, for reasoning about such extremal timing properties and showed .... A control flow decision is taken based on the value of one or more variables (like a ... We first present a few examples to informally explain the.

  8. Supervisory control of (max,+) automata: extensions towards applications

    Czech Academy of Sciences Publication Activity Database

    Lahaye, S.; Komenda, Jan; Boimond, J.-L.

    2015-01-01

    Roč. 88, č. 12 (2015), s. 2523-2537 ISSN 0020-7179 Institutional support: RVO:67985840 Keywords : discrete event systems * logical and time d behaviors * (max,+) automata * supervisory control Subject RIV: BA - General Mathematics Impact factor: 1.880, year: 2015 http://www.tandfonline.com/doi/full/10.1080/00207179.2015.1048295

  9. Supervisory control of (max,+) automata: extensions towards applications

    Czech Academy of Sciences Publication Activity Database

    Lahaye, S.; Komenda, Jan; Boimond, J.-L.

    2015-01-01

    Roč. 88, č. 12 (2015), s. 2523-2537 ISSN 0020-7179 Institutional support: RVO:67985840 Keywords : discrete event systems * logical and timed behaviors * (max,+) automata * supervisory control Subject RIV: BA - General Mathematics Impact factor: 1.880, year: 2015 http://www.tandfonline.com/doi/full/10.1080/00207179.2015.1048295

  10. RRM Strategies in LTE&WiMAX Interworking System

    DEFF Research Database (Denmark)

    Zakrzewska, Anna; Ruepp, Sarah Renée; Berger, Michael Stübert

    , that could be applied in 4G systems (LTE interworking with WiMAX is considered). Furthermore, it will also discuss the Radio Resource Management (RRM) problem addressing the challenges of designing a RRM system for such a multi-RAT wireless environment. Different functionalities and possibilities...

  11. Nurgapoliitik kavandab kasiinode alatut riigistamist / Max Kaur ; interv. Sulev Vedler

    Index Scriptorium Estoniae

    Kaur, Max, 1969-

    2007-01-01

    Edgar Savisaare endine nõunik Max Kaur esitleb röövkapitalismi ideed, et Eesti riik ei pikenda kasiinode tegevuslubasid ja võtab seejärel nende tegevuse odavalt üle. Kaart: Tallinna mängupõrgud 2007. Lisa

  12. Max Kaur vassib oma diplomitega / Ralf-Martin Soe

    Index Scriptorium Estoniae

    Soe, Ralf-Martin

    2008-01-01

    Eraülikooli prorektor Max Kaur kinnitas kohalikel valimistel allkirjaga, et on lõpetanud Moskva Riikliku Ülikooli, kuid pärast Äripäeva järelpärimist tunnistas selle info ekslikuks. Vt. samas: Vene ülikooli diplom 1200 dollariga; Ka Reimann valetas hariduse kohta

  13. Max-plus algebraic throughput analysis of synchronous dataflow graphs

    NARCIS (Netherlands)

    de Groote, Robert; Kuper, Jan; Broersma, Haitze J.; Smit, Gerardus Johannes Maria

    2012-01-01

    In this paper we present a novel approach to throughput analysis of synchronous dataflow (SDF) graphs. Our approach is based on describing the evolution of actor firing times as a linear time-invariant system in max-plus algebra. Experimental results indicate that our approach is faster than

  14. Supervisory Control of (max,+) automata: a behavioral approach

    Czech Academy of Sciences Publication Activity Database

    Komenda, Jan; Lahaye, S.; Boimond, J.-L.

    2009-01-01

    Roč. 19, č. 4 (2009), s. 525-549 ISSN 0924-6703 Grant - others:EU Projekt(XE) EU.ICT.DISC 224498 Institutional research plan: CEZ:AV0Z10190503 Keywords : timed discrete-event systems * supervisory control * formal power series * (max,+) * automata Subject RIV: BA - General Mathematics Impact factor: 0.921, year: 2009

  15. Sympathy and the Non-human: Max Scheler's Phenomenology of ...

    African Journals Online (AJOL)

    German phenomenologist and sociologist Max Scheler accorded sympathy a central role in his philosophy, arguing that sympathy enables not only ethical behaviour, but also knowledge of animate and inanimate others. Influenced by Catholicism and especially St Francis, Scheler envisioned a broad, cosmic sympathy ...

  16. Reaction of some selected soybean varieties ( Glycine max (L) Merril)

    African Journals Online (AJOL)

    In nematode endemic ecological zones, TGX-1985 – 8F is therefore recommended as it proved to contain some specialized genes that conferred a higher level of tolerance against root- knot nematode, Meloidogyne incognita. Key Words: Glycine max, root – knot nematode, Dominant loci, Mi – 1.2, leucine zipper and R ...

  17. Soybean ( Glycine max ) as a versatile biocatalyst for organic ...

    African Journals Online (AJOL)

    A series of aliphatic and aromatic aldehydes and ketones were reduced using plant cell preparations of Glycine max seeds (soybean). The biotransformation of five aromatic aldehydes in water, at room temperature afforded the corresponding alcohols in excellent yields varying from 89 to 100%. Two prochiral aromatic ...

  18. Nouvelle procédure pour l'augmentation du temps d'usinage simulé en coupe orthogonale

    OpenAIRE

    Guediche , Mayssa; Mabrouki , Tarek; Donnet , Christophe; Bergheau , Jean-Michel; Hamdi , Hedi

    2015-01-01

    International audience; Cette étude présente une nouvelle méthodologie visant à augmenter le temps d'usinage simulé en coupe orthogonale .Le but est d'étudier ultérieurement l'évolution de l'usure des outils de coupe dans le cas de l'usinage de l'acier 42CD4. Un modèle lagrangien est donc développé sous le code de calcul ABAQUS simulant la formation du copeau. Une approche baptisée de « modélisation verticale » est développée dans le but d'augmenter le temps de coupe simulé tout en gardant un...

  19. Turbine and Structural Seals Team Facilities

    Data.gov (United States)

    Federal Laboratory Consortium — Seals Team Facilities conceive, develop, and test advanced turbine seal concepts to increase efficiency and durability of turbine engines. Current projects include...

  20. PENGARUH PEMBERIAN JUMLAH TAKARAN RAGI TERHADAP KANDUNGAN PROTEIN YANG DIHASILKAN PADA TEMPE BIJI NANGKA (Artocarpus heterophyllus

    Directory of Open Access Journals (Sweden)

    Harmoko Harmoko

    2016-05-01

    Full Text Available Jackfruit (Artocarpusheterophyllus, is well known in Indonesia, when the fruit is ripe jackfruit can be consumed. After we consume jackfruit, we'll leave the trash in the form of jackfruit seed, which has not been used by the community to the fullest. The purpose of this study are trying to explore another potential of jackfruit seeds and increasing the protein content of jackfruit seeds by processing  in to tempeh. Another purpose is knowing the number yeast of doses that can produce in tempeh of jackfruit seeds. This research uses 4 treatments (A: 0.25 grams yeast/50 grams jackfruit seed, B: 0.50 grams yeast/50 grams jackfruit seeds, C: 0.75 gram yeast/50 grams jackfruit seeds, and D: 1 grams yeast/50 grams of jackfruit seeds with 4 repetitions. Test protein content tests conducted at the Laboratory of Food Technology and Agricultural Faculty of Agricultural Technology, GadjahMada University (UGM. Treatment A produced protein average of 2,64%, B produced protein average of 3,429%, treatment C produced protein average of 4,146% and treatment D produced protein average of 5,635% protein. The highest protein content is produced by treatment D. Keywords: Takaran   ragi, tempe  biji  nangka (Artocarpusheterophyllus,kandungan protein.

  1. Couches minces supraconductrices à haute température critique pour l'électronique

    Science.gov (United States)

    Guilloux-Viry, M.; Perrin, A.

    1998-08-01

    High critical temperature superconductors (HTCS) are very promising for applications in microelectronics due to the control of high quality epitaxial thin films, in spite of a number of specific constraints. Active and passive devices are already available in various laboratories, prooving that applications are actually expected soon. We report here on the interest of HTCS thin films, on preparation processes including materials and substrates choice, and also on characterization methods which are required in order to chek the quality of the samples. Finally some illustrative examples of applications are presented. Les supraconducteurs à haute température critique ouvrent des perspectives prometteuses dans le domaine de l'électronique en raison de la maîtrise de la croissance de films minces de haute qualité cristalline et physique, malgré des difficultés spécifiques. Des dispositifs, aussi bien actifs que passifs, commencent à être réalisés dans divers laboratoires, montrant que des applications peuvent être effectivement envisagées à relativement court terme.

  2. Nouveaux supraconducteurs à haute température critique à base de mercure

    Science.gov (United States)

    Michel, C.; Hervieu, M.; Martin, C.; Maignan, A.; Pelloquin, D.; Goutenoire, F.; Huvé, M.; Raveau, B.

    1994-11-01

    Structural and superconducting properties of new cations substituted mercury based oxides are described. They are mainly characterized by [ Hg{1-x}MxOδ] infty monolayers, however a compound with doubled [ Hg{1-x}MxOδ] infty layer is described for the first time. Critical temperatures vary in a large range 0leqslant T_cleqslant 130 K, but they are lower than those of related to pure mercury oxides. The influence of annealings in various atmospheres upon T_c is discussed. Les caractéristiques structurales et supraconductrices de nouveaux oxydes à base de mercure, dans lesquels le mercure est partiellement remplacé par un autre cation, sont décrites. Dans la majorité des cas, ces oxydes sont caractérisés par une monocouche [ Hg{1-x}MxOδ] infty ; cependant, pour la première fois un composé contenant une double couche majoritaire en mercure est isolé. Les températures critiques varient dans un large domaine (0-130 K) mais restent inférieures à celles des oxydes parents ll tout mercure gg. L'influence des recuits sous des atmosphères diverses est discutée.

  3. Trous noirs et distorsions du temps l'héritage sulfureux d'Einstein

    CERN Document Server

    Thorne, Kip S

    1997-01-01

    Kip S. Thorne a été l'un des acteurs privilégiés d'une quête grandiose, qui a duré près de trente années, pour comprendre l'héritage transmis par Einstein - la théorie de la relativité générale et ses étonnantes prédictions concernant l'univers -, pour découvrir où et comment la relativité échoue, et pour trouver ce qui alors la remplace. Le lecteur est entraîné à travers un labyrinthe d'objets exotiques: trous noirs, naines blanches, étoiles à neutrons, ondes gravitationnelles, trous de ver et machines à voyager dans le temps. Il suit pas à pas l'histoire de ces découvertes scientifiques qui ont toutes été prédites par la théorie de la relativité et à certaines desquelles Einstein lui-même ne croyait pas. L'auteur écrit ainsi la chronique fascinante des efforts qui menèrent à la compréhension des objets peut-être les plus mystérieux de l'univers, en particulier les trous noirs. Jonglant avec les décennies, évoquant la multiplicité des collaborations scientifiques à...

  4. Psychometric characteristics of the long version of Slovenian temperament autoquestionnaire TEMPS-A

    Directory of Open Access Journals (Sweden)

    Barbara Dolenc

    2011-08-01

    Full Text Available Temperament Evaluation of Memphis, Pisa, Paris and San Diego – Autoquestionnaire (TEMPSA is a self-rated questionnaire that measures five dimensions of affective temperaments. It is designed for assessing affective temperaments in general and clinical population. Estimation of the affective temperaments proved to play an important role in prediction and assessment of early signs of mood disorders. The aim of our study was to translate, adapt and analyse the long version of the TEMPS-A instrument. 1167 students from different Slovenian universities participated. We analysed the results with classical test theory and Rasch model. The results showed good reliability of all five scales with alpha coefficients between .76 and .84, only the reliability of the depressive temperament was lower in comparison with other subscales (α=.66. With the principal component analysis we extracted five components. Hyperthymic temperament proved to be the most homogenous, yet less sensitive to discriminate between those with adaptive personality structure on one hand and possibility to develop mood disorder in the future on the other. The structure of anxious temperament is not very clear, since two different types of anxious temperament emerged. The first one relates to somatic items, whereas the other links more to the items of general anxiousness. Nevertheless, our results are in agreement with several previous studies in Europe, Asia and North and South America.

  5. Les secrets de l'efficacité en faire plus... en moins de temps

    CERN Document Server

    Savoyat, Bruno

    2006-01-01

    Comment gagner en efficacité grâce à une meilleure organisation et à une utilisation plus performante de l'informatique. Ce livre, rédigé par un spécialiste internationalement reconnu des méthodes d'optimisation du travail, vous fournit £ une méthode de hiérarchisation des tâches et 0 les règles qui vous permettront d'acquérir une meilleure organisation personnelle et collective. Il montre également % comment utiliser au mieux les outils informatiques (Internet, Intranet, groupware) pour parvenir à gagner en efficacité au bureau. Parce que les techniques qu'il propose ont été appliquées avec succès par plus d'1 million de personnes dans le monde, ce livre vous aidera vraiment. Grâce à ce livre vous apprendrez à : ° Mieux gérer votre emploi du temps en fonction de vos priorités, de vos responsabilités et de vos objectifs en établissant votre «carte de responsabilités» et en apprenant à déléguer. ° Mieux organiser le rangement des documents sur votre bureau, dans votre messag...

  6. TEMP-STRESS analysis of a reinforced concrete vessel under internal pressure

    International Nuclear Information System (INIS)

    Marchertas, A.H.; Kennedy, J.M.; Pfeiffer, P.A.

    1987-01-01

    The TEMP-STRESS FEM represents an axisymmetric simulation of the reinforced concrete vessel to internal pressurization. The information shows the global deformation, the state of strain/stress within the containment vessel with respect to the imposed pressures. Thus, the location and progress of concrete cracking, the stretching of the liner and the reinforcing bars and final failure are indicated through the entire loading range. Equilibrium of the entire system is assured at definite loading increments. With the progress of concrete cracking, the resisting load is continuously transferred to the reinforcing bars and the liner. Thus, after the tensile strength is exceeded and the concrete stress is set to zero, the internal pressures are entirely resisted by the liner and the reserve strength of the reinforcing bars. The reinforcing bars are mechanically connected to each other by splices, the ultimate strength of which is less than that of the rebars themselves. The corresponding strain at this limiting stress is lower than the ultimate strain of the liner. Therefore, the specified ultimate strength of the splices limits the pressurization of the vessel. Furthermore, once any of the splices fail, then load is transferred to the adjacent members, causing their failure and general failure of the vessel. (orig./HP)

  7. PENGARUH HARGA DAN KUALITAS PRODUK TERHADAP KEPUASAN PELANGGAN TEMPE PASAR TRADISIONAL LEMBANG

    Directory of Open Access Journals (Sweden)

    Tri Widyastuti

    2017-09-01

    Full Text Available Customer satisfaction is the level of customer ratings of products or services. Manufacturers and traders need to consider the level of customer satisfaction by improving product quality, service quality, price and customer emotional level, as well as production costs. Customer satisfaction measurement provides information for producers, traders and consumers of the products or services produced. This study uses descriptive quantitative method, distributing randomly questionaire to the “Tempe” customers at Pasar Lembang, Kota Tangerang. The evidence from the results obtained from the calculation showed that there is a significant influence partially and simultaneously of price and product quality to customer satisfaction of tempe at Lembang Traditional Market, Kota Tangerang. It can be concluded that the traders and producers should maintain and improve the quality of their products and give the compatible price of the products ‘Tempe” in accordance with their qualities in order to increase the purchasing power and consumer loyalty in consuming the product. Keywords: Pricing, Product Quality, Customer Satisfaction.

  8. Literature in focus: Explorer l'espace pour remonter le temps

    CERN Document Server

    2006-01-01

    Would Prof Bignami like to dance on Saturn's rings? Why not ask him? Astrophysicist, Director of the Centre d'étude spatiale des rayonnements de Toulouse, President of the Scientific Committee of the European Space Agency and member of the Accademia dei Lincei, Giovanni Bignami returns to CERN to present his new book published last month. Exploring space to rewind time: the book tells the history of the people and the organisations which have led our exploration of space, from Giotto to the present day. At CERN we might go no further than our labs to rewind time, but for astrophysicists the search for an understanding of the Universe takes a journey of a much greater distance. Who better than Prof Bignami to tell us about this extraordinary adventure? Join the library staff for an intimate discussion with Prof Bignami about the experiences and interests that led him to write this book. Giovanni Bignami 'Explorer l'espace pour remonter le temps' Monday 20 February at 4 p.m. Central Library reading room ...

  9. Simulation de la répartition de température dans un bloc en acier ...

    African Journals Online (AJOL)

    Simulation of the temperature distribution within a steel block ... Mots clés: Simulation – Fortran – Différences finies – Equation de la chaleur – Température. ..... TM = (15). La méthode de sur-relaxation successive obtenue à partir de la méthode de Gausse-Seidel est utilisée pour accélérer la convergence du système.

  10. STATIC{sub T}EMP: a useful computer code for calculating static formation temperatures in geothermal wells

    Energy Technology Data Exchange (ETDEWEB)

    Santoyo, E. [Universidad Nacional Autonoma de Mexico, Centro de Investigacion en Energia, Temixco (Mexico); Garcia, A.; Santoyo, S. [Unidad Geotermia, Inst. de Investigaciones Electricas, Temixco (Mexico); Espinosa, G. [Universidad Autonoma Metropolitana, Co. Vicentina (Mexico); Hernandez, I. [ITESM, Centro de Sistemas de Manufactura, Monterrey (Mexico)

    2000-07-01

    The development and application of the computer code STATIC{sub T}EMP, a useful tool for calculating static formation temperatures from actual bottomhole temperature data logged in geothermal wells is described. STATIC{sub T}EMP is based on five analytical methods which are the most frequently used in the geothermal industry. Conductive and convective heat flow models (radial, spherical/radial and cylindrical/radial) were selected. The computer code is a useful tool that can be reliably used in situ to determine static formation temperatures before or during the completion stages of geothermal wells (drilling and cementing). Shut-in time and bottomhole temperature measurements logged during well completion activities are required as input data. Output results can include up to seven computations of the static formation temperature by each wellbore temperature data set analysed. STATIC{sub T}EMP was written in Fortran-77 Microsoft language for MS-DOS environment using structured programming techniques. It runs on most IBM compatible personal computers. The source code and its computational architecture as well as the input and output files are described in detail. Validation and application examples on the use of this computer code with wellbore temperature data (obtained from specialised literature) and with actual bottomhole temperature data (taken from completion operations of some geothermal wells) are also presented. (Author)

  11. Wind Turbine Acoustic Day 2018

    DEFF Research Database (Denmark)

    Mogensen, Jesper; Søndergaard, Bo; Hünerbein, Sabine Von

    The bi-annual event entitled Wind Turbine Acoustic Day dealing with wind turbine noise issues organized by DTU Wind Energy took place on May, 17th 2018 as its third edition. The abstracts and slides for the presentations are reported....

  12. Gas fired advanced turbine system

    Science.gov (United States)

    Lecren, R. T.; White, D. J.

    The basic concept thus derived from the Ericsson cycle is an intercooled, recuperated, and reheated gas turbine. Theoretical performance analyses, however, showed that reheat at high turbine rotor inlet temperatures (TRIT) did not provide significant efficiency gains and that the 50 percent efficiency goal could be met without reheat. Based upon these findings, the engine concept adopted as a starting point for the gas-fired advanced turbine system is an intercooled, recuperated (ICR) gas turbine. It was found that, at inlet temperatures greater than 2450 F, the thermal efficiency could be maintained above 50%, provided that the turbine cooling flows could be reduced to 7% of the main air flow or lower. This dual and conflicting requirement of increased temperatures and reduced cooling will probably force the abandonment of traditional air cooled turbine parts. Thus, the use of either ceramic materials or non-air cooling fluids has to be considered for the turbine nozzle guide vanes and turbine blades. The use of ceramic components for the proposed engine system is generally preferred because of the potential growth to higher temperatures that is available with such materials.

  13. Technical diagnostics of steam turbines

    International Nuclear Information System (INIS)

    Vlckova, B.; Drahy, J.

    1987-01-01

    This paper deals with practical experience in application of technical diagnostics methods to steam turbines, in particular using pedestal and shaft vibration measurements as well as estimation of bearing metal temperature and ultrasound emission signals. An estimation of effectiveness of the diagnostics methods used is given on the basis of experimental investigations made on a 30-MW turbine. (author)

  14. Reliability of wind turbine subassemblies

    NARCIS (Netherlands)

    Spinato, F.; Tavner, P.J.; Bussel, van G.J.W.; Koutoulakos, E.

    2009-01-01

    We have investigated the reliability of more than 6000 modern onshore wind turbines and their subassemblies in Denmark and Germany over 11 years and particularly changes in reliability of generators, gearboxes and converters in a subset of 650 turbines in Schleswig Holstein, Germany. We first start

  15. Wind turbine supply in Canada

    International Nuclear Information System (INIS)

    Snodin, H.

    2007-01-01

    This study reported on wind turbine supplies to the Canadian market. The report was written to address concerns for Canada's supply outlook in the near future due to the booming wind energy market. Turbine shortages have arisen as a result of continued growth in both European and North American markets. Long lead-times on turbine orders are now increasing the pressure to lock in turbine supply during the initial phases of the development process. Future growth of the wind energy industry will be impacted if turbine supply difficulties continue to contribute to uncertainties in the development process. The report provided an overview of the North American and global wind energy markets, as well as a summary of telephone interviews conducted with turbine suppliers. The implications for the future of turbine supply to the Canadian market were also analyzed. It was concluded that policy-makers should focus on supporting the expansion of manufacturing facilities for small wind turbines and control infrastructure in Canada 7 refs., 3 figs

  16. Review: TASHI'S TURBINE

    Directory of Open Access Journals (Sweden)

    Alexander R O'Neill

    2018-05-01

    Full Text Available Amitabh Raj Joshi (director, producer. 2015. Tashi's Turbine. New York City, NY: Vacant Light LLC. 56 mins. http://bit.ly/2tg9fTx, Nepali and Lowa, English subtitles. Color. (Institutional use 320USD; (personal use 34.95USD. In the windswept valleys of Upper Mustang, Nepal, renewable energy is transforming lives. Micro-turbine projects have connected off-grid communities with basic electricity, providing hope for sustainable growth on the Roof of the World. The documentary Tashi's Turbine follows two friends as they experiment with these technologies in Nyamdok Village, along the Sino-Nepali border. Recognizing that high-mountain valleys, including Mustang, Palpa, and Khumbu, are rich in wind resources, Tashi and his friend, Jeevan Kumar Oli, attempt to mitigate poverty using grassroots energy. Tashi Bista was inspired in his youth by tales of "wind machines" at Kagbeni Village in Upper Mustang. In 1987, the Danish Government had funded a twenty-kilowatt turbine in the area; but, it was rapidly decommissioned due to maintenance complications. In 1996, the Government of Nepal established the Alternative Energy Promotion Center (AEPC to revive this and other wind programs and address related challenges. Nevertheless, AEPC's latest Wind Energy Resource Assessment revealed two decades of inaction. Wind programs in other parts of the country remain nascent; much of Central and Western Nepal have yet to be connected to the national grid. Director and cinematographer Amitabh Raj Joshi cultivates a nuanced vision of these developments by juxtaposing majestic landscapes against simple homes and everyday struggles for existence. The film opens with panoramas of the sapphire skies and canvas valleys of Mustang. Minutes later, kerosene fixtures illuminate paltry yields from subsistence harvests; children attempt to study under candlelight, often to no avail. Voicing the narratives of villagers like Chhimi Lhamo, Karma Lutok, and Pemba Tashi, Joshi captures

  17. NEXT GENERATION TURBINE PROGRAM

    Energy Technology Data Exchange (ETDEWEB)

    William H. Day

    2002-05-03

    The Next Generation Turbine (NGT) Program's technological development focused on a study of the feasibility of turbine systems greater than 30 MW that offer improvement over the 1999 state-of-the-art systems. This program targeted goals of 50 percent turndown ratios, 15 percent reduction in generation cost/kW hour, improved service life, reduced emissions, 400 starts/year with 10 minutes to full load, and multiple fuel usage. Improvement in reliability, availability, and maintainability (RAM), while reducing operations, maintenance, and capital costs by 15 percent, was pursued. This program builds on the extensive low emissions stationary gas turbine work being carried out by Pratt & Whitney (P&W) for P&W Power Systems (PWPS), which is a company under the auspices of the United Technologies Corporation (UTC). This study was part of the overall Department of Energy (DOE) NGT Program that extends out to the year 2008. A follow-on plan for further full-scale component hardware testing is conceptualized for years 2002 through 2008 to insure a smooth and efficient transition to the marketplace for advanced turbine design and cycle technology. This program teamed the National Energy Technology Laboratory (NETL), P&W, United Technologies Research Center (UTRC), kraftWork Systems Inc., a subcontractor on-site at UTRC, and Multiphase Power and Processing Technologies (MPPT), an off-site subcontractor. Under the auspices of the NGT Program, a series of analyses were performed to identify the NGT engine system's ability to serve multiple uses. The majority were in conjunction with a coal-fired plant, or used coal as the system fuel. Identified also was the ability of the NGT system to serve as the basis of an advanced performance cycle: the humid air turbine (HAT) cycle. The HAT cycle is also used with coal gasification in an integrated cycle HAT (IGHAT). The NGT systems identified were: (1) Feedwater heating retrofit to an existing coal-fired steam plant, which

  18. Advanced Hydrogen Turbine Development

    Energy Technology Data Exchange (ETDEWEB)

    Joesph Fadok

    2008-01-01

    Siemens has developed a roadmap to achieve the DOE goals for efficiency, cost reduction, and emissions through innovative approaches and novel technologies which build upon worldwide IGCC operational experience, platform technology, and extensive experience in G-class operating conditions. In Phase 1, the technologies and concepts necessary to achieve the program goals were identified for the gas turbine components and supporting technology areas and testing plans were developed to mitigate identified risks. Multiple studies were conducted to evaluate the impact in plant performance of different gas turbine and plant technologies. 2015 gas turbine technologies showed a significant improvement in IGCC plant efficiency, however, a severe performance penalty was calculated for high carbon capture cases. Thermodynamic calculations showed that the DOE 2010 and 2015 efficiency targets can be met with a two step approach. A risk management process was instituted in Phase 1 to identify risk and develop mitigation plans. For the risks identified, testing and development programs are in place and the risks will be revisited periodically to determine if changes to the plan are necessary. A compressor performance prediction has shown that the design of the compressor for the engine can be achieved with additional stages added to the rear of the compressor. Tip clearance effects were studied as well as a range of flow and pressure ratios to evaluate the impacts to both performance and stability. Considerable data was obtained on the four candidate combustion systems: diffusion, catalytic, premix, and distributed combustion. Based on the results of Phase 1, the premixed combustion system and the distributed combustion system were chosen as having the most potential and will be the focus of Phase 2 of the program. Significant progress was also made in obtaining combustion kinetics data for high hydrogen fuels. The Phase 1 turbine studies indicate initial feasibility of the

  19. Aeroservoelasticity of wind turbines

    Energy Technology Data Exchange (ETDEWEB)

    Skovmose Kallesoee, B.

    2007-12-14

    This thesis deals with the fundamental aeroelastic interaction between structural motion, Pitch action and control for a wind turbine blade. As wind turbines become larger, the interaction between pitch action, blade motion, aerodynamic forces, and control become even more important to understand and address. The main contribution of this thesis is the development of an aeroelastic blade model which on the one hand includes the important effects of steady state blade deformation, gravity and pitch action, and on the other it is transparent, suitable for analytical analysis and parameter studies, and furthermore linear and therefore suitable for control design. The development of the primary aeroelastic blade model is divided into four steps: 1) Nonlinear partial differential equations (PDEs) of structural blade motion are derived together with equations of pitch action and rotor speed; the individual terms in these equations are discussed and given physical interpretations; 2) Steady state blade deformation and induced velocities are computed by combining the PDEs with a steady state aerodynamic model; 3) Aeroelastic modes of motion are computed by combining the linearized PDEs with a linear unsteady aerodynamic model; this model is used to analyze how blade deformation effects the modes of motion; and 4) the linear aeroelastic blade model is derived by a modal expansion of the linearized PDEs combined with a linear unsteady aerodynamic model. The aeroelastic blade model has many similarities to a 2D blade section model, and it can be used instead of this in many applications, giving a transparent connection to a real wind turbine blade. In this work the aeroelastic blade model is used to analyze interaction between pitch action, blade motion and wind speed variations. Furthermore the model is used to develop a state estimator for estimating the wind speed and wind shear, and to suggest a load reducing controller. The state estimator estimates the wind shear very

  20. Ceramic Parts for Turbines

    Science.gov (United States)

    Jones, R. D.; Carpenter, Harry W.; Tellier, Jim; Rollins, Clark; Stormo, Jerry

    1987-01-01

    Abilities of ceramics to serve as turbine blades, stator vanes, and other elements in hot-gas flow of rocket engines discussed in report. Ceramics prime candidates, because of resistance to heat, low density, and tolerance of hostile environments. Ceramics considered in report are silicon nitride, silicon carbide, and new generation of such ceramic composites as transformation-toughened zirconia and alumina and particulate- or whisker-reinforced matrices. Report predicts properly designed ceramic components viable in advanced high-temperature rocket engines and recommends future work.

  1. Wind turbine airfoil catalogue

    OpenAIRE

    Bertagnolio, F.; Sørensen, Niels N.; Johansen, Jeppe; Fuglsang, P.

    2001-01-01

    The aim of this work is two-sided. Firstly, experimental results obtained for numerous sets of airfoil measurements (mainly intended for wind turbine applications) are collected and compared with computational results from the 2D Navier-Stokes solverEllipSys2D, as well as results from the panel method code XFOIL. Secondly, we are interested in validating the code EllipSys2D and finding out for which airfoils it does not perform well compared to the experiments, as well as why, when it does so...

  2. Reliability assessment of Wind turbines

    DEFF Research Database (Denmark)

    Sørensen, John Dalsgaard

    2015-01-01

    Wind turbines can be considered as structures that are in between civil engineering structures and machines since they consist of structural components and many electrical and machine components together with a control system. Further, a wind turbine is not a one-of-a-kind structure...... but manufactured in series production based on many component tests, some prototype tests and zeroseries wind turbines. These characteristics influence the reliability assessment where focus in this paper is on the structural components. Levelized Cost Of Energy is very important for wind energy, especially when...... comparing to other energy sources. Therefore much focus is on cost reductions and improved reliability both for offshore and onshore wind turbines. The wind turbine components should be designed to have sufficient reliability level with respect to both extreme and fatigue loads but also not be too costly...

  3. Megawatt wind turbines gaining momentum

    International Nuclear Information System (INIS)

    Oehlenschlaeger, K.; Madsen, B.T.

    1996-01-01

    Through the short history of the modern wind turbine, electric utilities have made it amply clear that they have held a preference for large scale wind turbines over smaller ones, which is why wind turbine builders through the years have made numerous attempts develop such machines - machines that would meet the technical, aesthetic and economic demands that a customer would require. Considerable effort was put into developing such wind turbines in the early 1980s. There was the U.S. Department of Energy's MOD 1-5 program, which ranged up to 3.2 MW, Denmark's Nibe A and B, 630 kW turbine and the 2 MW Tjaereborg machine, Sweden's Naesudden, 3 MW, and Germany's Growian, 3 MW. Most of these were dismal failures, though some did show the potential of MW technology. (au)

  4. TEMPS-A: validation of a short version of a self-rated instrument designed to measure variations in temperament.

    Science.gov (United States)

    Akiskal, Hagop S; Mendlowicz, Mauro V; Jean-Louis, Girardin; Rapaport, Mark H; Kelsoe, John R; Gillin, J Christian; Smith, Tom L

    2005-03-01

    To validate a short English-language version of the Temperament Evaluation of Memphis, Pisa, Paris and San Diego-autoquestionnaire version (TEMPS-A), a self-report questionnaire designed to measure temperamental variations in psychiatric patients and healthy volunteers. Its constituent subscales and items were formulated on the basis of the diagnostic criteria for affective temperaments (cyclothymic, dysthymic, irritable, hyperthymic, and anxious), originally developed by the first author and his former collaborators. Further item wording and selection were achieved at a later stage through an iterative process that incorporated feedback from clinicians, researchers, and research volunteers. A total of 510 volunteers (284 patients with mood disorders, 131 relatives of bipolar probands, and 95 normal controls) were recruited by advertisement in the newspapers, announcements on radio and television, flyers and newsletters, and word of mouth. All participants were interviewed using the Structured Clinical Interview for DSM-III-R, and completed the 110-item TEMPS-A and the Temperament and Character Inventory (TCI-125). The factorial structure, the alpha coefficients, and the item-total correlations coefficients of the TEMPS-A and the correlation coefficients between the dimensions of the TCI and the TEMPS-A subscales were then determined. A principal components analysis with a Varimax rotation found that 39 out of the 110 original items of the TEMPS-A loaded on five factors that were interpreted as representing the cyclothymic, depressive, irritable, hyperthymic, and anxious factors. Coefficients alpha for internal consistency were 0.91 (cyclothymic), 0.81 (depressive), 0.77 (irritable), 0.76 (hyperthymic), and 0.67 (anxious) subscales. We found statistically significant positive correlations between all-but the hyperthymic-subscales and harm avoidance. Positive correlations with the hyperthymic and cyclothymic, and novelty seeking and negative correlations with the

  5. Calculation of gas turbine characteristic

    Science.gov (United States)

    Mamaev, B. I.; Murashko, V. L.

    2016-04-01

    The reasons and regularities of vapor flow and turbine parameter variation depending on the total pressure drop rate π* and rotor rotation frequency n are studied, as exemplified by a two-stage compressor turbine of a power-generating gas turbine installation. The turbine characteristic is calculated in a wide range of mode parameters using the method in which analytical dependences provide high accuracy for the calculated flow output angle and different types of gas dynamic losses are determined with account of the influence of blade row geometry, blade surface roughness, angles, compressibility, Reynolds number, and flow turbulence. The method provides satisfactory agreement of results of calculation and turbine testing. In the design mode, the operation conditions for the blade rows are favorable, the flow output velocities are close to the optimal ones, the angles of incidence are small, and the flow "choking" modes (with respect to consumption) in the rows are absent. High performance and a nearly axial flow behind the turbine are obtained. Reduction of the rotor rotation frequency and variation of the pressure drop change the flow parameters, the parameters of the stages and the turbine, as well as the form of the characteristic. In particular, for decreased n, nonmonotonic variation of the second stage reactivity with increasing π* is observed. It is demonstrated that the turbine characteristic is mainly determined by the influence of the angles of incidence and the velocity at the output of the rows on the losses and the flow output angle. The account of the growing flow output angle due to the positive angle of incidence for decreased rotation frequencies results in a considerable change of the characteristic: poorer performance, redistribution of the pressure drop at the stages, and change of reactivities, growth of the turbine capacity, and change of the angle and flow velocity behind the turbine.

  6. [Psychiatry as cultural science: considerations following Max Weber].

    Science.gov (United States)

    Bormuth, M

    2010-11-01

    Psychiatry can be seen as a natural and cultural science. According to this the postulate of freedom is its strong value judgment. Since the times of enlightenment it has been described metaphorically by the myth of the expulsion from Paradise. Following Max Weber and Wilhelm Dilthey, Karl Jaspers has introduced this perspective into psychiatry. His strict dichotomy between explaining and understanding has later been critically revised by Werner Janzarik and Hans Heimann. Their concepts of structure dynamic, of pathography and of anthropology are closer to Max Weber who connected natural and cultural sciences in a much stronger way. Especially the pathographic example of Nietzsche allows to demonstrate the differences between Jaspers and the later psychopathologists of the Heidelberg and Tübingen schools.

  7. Evaluating the Performance of IPTV over Fixed WiMAX

    Science.gov (United States)

    Hamodi, Jamil; Salah, Khaled; Thool, Ravindra

    2013-12-01

    IEEE specifies different modulation techniques for WiMAX; namely, BPSK, QPSK, 16 QAM and 64 QAM. This paper studies the performance of Internet Protocol Television (IPTV) over Fixed WiMAX system considering different combinations of digital modulation. The performance is studied taking into account a number of key system parameters which include the variation in the video coding, path-loss, scheduling service classes different rated codes in FEC channel coding. The performance study was conducted using OPNET simulation. The performance is studied in terms of packet lost, packet jitter delay, end-to-end delay, and network throughput. Simulation results show that higher order modulation and coding schemes (namely, 16 QAM and 64 QAM) yield better performance than that of QPSK.

  8. IMPROVEMENT OF THE RICHNESS ESTIMATES OF maxBCG CLUSTERS

    International Nuclear Information System (INIS)

    Rozo, Eduardo; Rykoff, Eli S.; Koester, Benjamin P.; Hansen, Sarah; Becker, Matthew; Bleem, Lindsey; McKay, Timothy; Hao Jiangang; Evrard, August; Wechsler, Risa H.; Sheldon, Erin; Johnston, David; Annis, James; Scranton, Ryan

    2009-01-01

    Minimizing the scatter between cluster mass and accessible observables is an important goal for cluster cosmology. In this work, we introduce a new matched filter richness estimator, and test its performance using the maxBCG cluster catalog. Our new estimator significantly reduces the variance in the L X -richness relation, from σ lnLx 2 = (0.86±0.02) 2 to σ lnLx 2 = (0.69±0.02) 2 . Relative to the maxBCG richness estimate, it also removes the strong redshift dependence of the L X -richness scaling relations, and is significantly more robust to photometric and redshift errors. These improvements are largely due to the better treatment of galaxy color data. We also demonstrate the scatter in the L X -richness relation depends on the aperture used to estimate cluster richness, and introduce a novel approach for optimizing said aperture which can easily be generalized to other mass tracers.

  9. MAX: Development of a Laue diffraction lens for nuclear astrophysics

    International Nuclear Information System (INIS)

    Barriere, N.; Ballmoos, P. von; Skinner, G.; Smither, B.; Bastie, P.; Hinglais, E.; Abrosimov, N.; Alvarez, J.M.; Andersen, K.; Courtois, P.; Halloin, H.; Harris, M.; Isern, J.; Jean, P.; Knoedlseder, J.; Ubertini, P.; Vedrenne, G.; Weidenspointner, G.; Wunderer, C.

    2006-01-01

    The next generation of instrumentation for nuclear astrophysics will have to achieve an improvement in sensitivity by a factor of 10-100 over present technologies. With the focusing gamma-ray telescope MAX we take up this challenge and propose to combine the required sensitivity with high spectral and angular resolution, and the capability to measure the polarization of the photons. MAX is a space-borne crystal diffraction telescope, featuring a broad-band Laue lens optimized for the observation of compact sources in two wide energy bands of high astrophysical relevance. Gamma rays will be focused from the large collecting area of a crystal diffraction lens onto a very small detector volume. As a consequence, the signal to background ratio is greatly enhanced, leading to unprecedented sensitivities

  10. Sending Safety Video over WiMAX in Vehicle Communications

    Directory of Open Access Journals (Sweden)

    Jun Steed Huang

    2013-10-01

    Full Text Available This paper reports on the design of an OPNET simulation platform to test the performance of sending real-time safety video over VANET (Vehicular Adhoc NETwork using the WiMAX technology. To provide a more realistic environment for streaming real-time video, a video model was created based on the study of video traffic traces captured from a realistic vehicular camera, and different design considerations were taken into account. A practical controller over real-time streaming protocol is implemented to control data traffic congestion for future road safety development. Our driving video model was then integrated with the WiMAX OPNET model along with a mobility model based on real road maps. Using this simulation platform, different mobility cases have been studied and the performance evaluated in terms of end-to-end delay, jitter and visual experience.

  11. Impact of shade on outdoor thermal comfort—a seasonal field study in Tempe, Arizona

    Science.gov (United States)

    Middel, Ariane; Selover, Nancy; Hagen, Björn; Chhetri, Nalini

    2016-12-01

    Shade plays an important role in designing pedestrian-friendly outdoor spaces in hot desert cities. This study investigates the impact of photovoltaic canopy shade and tree shade on thermal comfort through meteorological observations and field surveys at a pedestrian mall on Arizona State University's Tempe campus. During the course of 1 year, on selected clear calm days representative of each season, we conducted hourly meteorological transects from 7:00 a.m. to 6:00 p.m. and surveyed 1284 people about their thermal perception, comfort, and preferences. Shade lowered thermal sensation votes by approximately 1 point on a semantic differential 9-point scale, increasing thermal comfort in all seasons except winter. Shade type (tree or solar canopy) did not significantly impact perceived comfort, suggesting that artificial and natural shades are equally efficient in hot dry climates. Globe temperature explained 51 % of the variance in thermal sensation votes and was the only statistically significant meteorological predictor. Important non-meteorological factors included adaptation, thermal comfort vote, thermal preference, gender, season, and time of day. A regression of subjective thermal sensation on physiological equivalent temperature yielded a neutral temperature of 28.6 °C. The acceptable comfort range was 19.1 °C-38.1 °C with a preferred temperature of 20.8 °C. Respondents exposed to above neutral temperature felt more comfortable if they had been in air-conditioning 5 min prior to the survey, indicating a lagged response to outdoor conditions. Our study highlights the importance of active solar access management in hot urban areas to reduce thermal stress.

  12. Impact of shade on outdoor thermal comfort-a seasonal field study in Tempe, Arizona.

    Science.gov (United States)

    Middel, Ariane; Selover, Nancy; Hagen, Björn; Chhetri, Nalini

    2016-12-01

    Shade plays an important role in designing pedestrian-friendly outdoor spaces in hot desert cities. This study investigates the impact of photovoltaic canopy shade and tree shade on thermal comfort through meteorological observations and field surveys at a pedestrian mall on Arizona State University's Tempe campus. During the course of 1 year, on selected clear calm days representative of each season, we conducted hourly meteorological transects from 7:00 a.m. to 6:00 p.m. and surveyed 1284 people about their thermal perception, comfort, and preferences. Shade lowered thermal sensation votes by approximately 1 point on a semantic differential 9-point scale, increasing thermal comfort in all seasons except winter. Shade type (tree or solar canopy) did not significantly impact perceived comfort, suggesting that artificial and natural shades are equally efficient in hot dry climates. Globe temperature explained 51 % of the variance in thermal sensation votes and was the only statistically significant meteorological predictor. Important non-meteorological factors included adaptation, thermal comfort vote, thermal preference, gender, season, and time of day. A regression of subjective thermal sensation on physiological equivalent temperature yielded a neutral temperature of 28.6 °C. The acceptable comfort range was 19.1 °C-38.1 °C with a preferred temperature of 20.8 °C. Respondents exposed to above neutral temperature felt more comfortable if they had been in air-conditioning 5 min prior to the survey, indicating a lagged response to outdoor conditions. Our study highlights the importance of active solar access management in hot urban areas to reduce thermal stress.

  13. Max Aub revisitado: Lugares en (torno a La gallina ciega

    Directory of Open Access Journals (Sweden)

    Federico Gerhardt

    2006-11-01

    Full Text Available In La gallina ciega, Max Aub recollects and re-elaborates impressions (of his own and of others caused by his returning to Spain in 1969, after thirty years of exile in Mexico. This article analyses some of the manifestations of the dynamic relation between memory and literature, within La gallina ciega (in Aub's trips through the peninsular geography and also in the (rereadings of Aub's work, that show its position in the Spanish modern canon.

  14. A alquimia em "Uma semana de bondade" de Max Ernst

    Directory of Open Access Journals (Sweden)

    Bernadette Lyra

    1994-12-01

    Full Text Available Neste trabalho, a minha tentativa de estabelecer liames intertextuais entre Uma Semana de Bondade ou Os Sete Elementos Capitais -livro de colagens de Max Ernst - e os procedimentos alquimícos parte de estudos sobre a intertextualidade, tal como esse processo se encaixa no espaço semiótico, tomado este último como " um mecanismo único (senão como um organismo"(LOTMAN, 1991, p. 5.

  15. Architectural visualisation toolkit for 3D Studio Max users

    OpenAIRE

    Cooper , Neil

    2012-01-01

    Architectural Visualisation has become a vital part of the design process for architects and engineers. The process of modelling and rendering an architectural visualisation can be complex and time consuming with only a few tools available to assist novice modellers. This paper looks at available solutions for visualisation specialists including AutoCAD, 3D Studio Max and Google SketchUp as well as available solutions which attempt to automate the process including Batzal Roof ...

  16. On the likelihood function of Gaussian max-stable processes

    KAUST Repository

    Genton, M. G.; Ma, Y.; Sang, H.

    2011-01-01

    We derive a closed form expression for the likelihood function of a Gaussian max-stable process indexed by ℝd at p≤d+1 sites, d≥1. We demonstrate the gain in efficiency in the maximum composite likelihood estimators of the covariance matrix from p=2 to p=3 sites in ℝ2 by means of a Monte Carlo simulation study. © 2011 Biometrika Trust.

  17. Induced mutation in soybean (Glycine max L.) breeding

    International Nuclear Information System (INIS)

    Tulmann Neto, A.; Menten, J.O.M.; Ando, A.

    1984-01-01

    The induced mutation in soybean (Glycine max, L.) breeding is studied. Seed treatment with gamma-rays or methanesulfonic acid ethyl ester (EMs) is used in the following varieties: Parana, Santa Rosa, UFV-1, Foscarin 31 and IAC-8. The study to obtain resistance to the soybean bud blight virus and mutants resistant to rust was done. Early mutants are also researched. (M.A.C.) [pt

  18. O historiador Max Weber: indologia e historicismo na obra weberiana

    Directory of Open Access Journals (Sweden)

    Arilson Silva de Oliveira

    2010-06-01

    Full Text Available Max Weber assumed the methodological requirements of German historicism against all natural illuminist philosophy and all the idealistic philosophy of history. He improved them in order to prevent the conclusions of the romanticism and the psychological deviations of the neo-historicism. Here, we observe how he equipped himself with a particular method, rescued rationality and applied it as a parameter to historically understand Indian society in opposition to the disenchanted historicism of his time.

  19. On the Hitting Probability of Max-Stable Processes

    OpenAIRE

    Hofmann, Martin

    2012-01-01

    The probability that a max-stable process {\\eta} in C[0, 1] with identical marginal distribution function F hits x \\in R with 0 < F (x) < 1 is the hitting probability of x. We show that the hitting probability is always positive, unless the components of {\\eta} are completely dependent. Moreover, we consider the event that the paths of standard MSP hit some x \\in R twice and we give a sufficient condition for a positive probability of this event.

  20. Analisis Throughput Varian TCP Pada Model Jaringan WiMAX

    Directory of Open Access Journals (Sweden)

    Medi Taruk

    2016-07-01

    Full Text Available Transmission Control Protocol (TCP is a protocol that works at the transport layer of the OSI model. TCP was originally designed more destined for a wired network. However, to meet the need for the development of a very fast network technology based on the needs of the use by the user, it needs further development to the use of TCP on wireless devices. One implementation of a wireless network based on Worldwide Interoperability for Microwave Access (WiMAX network is a model that offers a variety advantage, particularly in terms of access speed. In this case, use NS-2 to see throughput at TCP variants tested, namely TCP-Tahoe, TCP-Reno, TCP-Vegas, and TCP-SACK over WiMAX network model, with few observations scenarios. The first is a look at each of these variants throughput of TCP when only one particular variant of the work in the network. Second observe all variants of TCP throughput at the same time and have the equivalent QoS, but with the possibility of a small congestion based on the capacity of the link is made sufficient. Third observed throughput with multi congestion. In WiMAX network has scheduling services are UGS, rtPS and ertPS using UDP protocol and nrtPS and BE using the TCP Protocol. By using the software network simulator (NS-2 to obtain performance comparison TCP protocol-based services on the WiMAX network with QoS parameters are throughput, packet loss, fairness and time delay.

  1. NiMax system for hadronic event generators in HEP

    International Nuclear Information System (INIS)

    Amelin, N.S.; Komogorov, M.E.

    2001-01-01

    We have suggested a new approach to the development and use of Monte Carlo event generators in high-energy physics (HEP). It is a component approach, when a complex numerical model is composed of standard components. Our approach opens a way to organize a library of HEP model components and provides a great flexibility for the construction of very powerful and realistic numerical models. To support this approach we have designed the NiMax software system (framework) written in C++

  2. On the likelihood function of Gaussian max-stable processes

    KAUST Repository

    Genton, M. G.

    2011-05-24

    We derive a closed form expression for the likelihood function of a Gaussian max-stable process indexed by ℝd at p≤d+1 sites, d≥1. We demonstrate the gain in efficiency in the maximum composite likelihood estimators of the covariance matrix from p=2 to p=3 sites in ℝ2 by means of a Monte Carlo simulation study. © 2011 Biometrika Trust.

  3. Cogeneration steam turbines from Siemens: New solutions

    Science.gov (United States)

    Kasilov, V. F.; Kholodkov, S. V.

    2017-03-01

    The Enhanced Platform system intended for the design and manufacture of Siemens AG turbines is presented. It combines organizational and production measures allowing the production of various types of steam-turbine units with a power of up to 250 MWel from standard components. The Enhanced Platform designs feature higher efficiency, improved reliability, better flexibility, longer overhaul intervals, and lower production costs. The design features of SST-700 and SST-900 steam turbines are outlined. The SST-700 turbine is used in backpressure steam-turbine units (STU) or as a high-pressure cylinder in a two-cylinder condensing turbine with steam reheat. The design of an SST-700 single-cylinder turbine with a casing without horizontal split featuring better flexibility of the turbine unit is presented. An SST-900 turbine can be used as a combined IP and LP cylinder (IPLPC) in steam-turbine or combined-cycle power units with steam reheat. The arrangements of a turbine unit based on a combination of SST-700 and SST-900 turbines or SST-500 and SST-800 turbines are presented. Examples of this combination include, respectively, PGU-410 combinedcycle units (CCU) with a condensing turbine and PGU-420 CCUs with a cogeneration turbine. The main equipment items of a PGU-410 CCU comprise an SGT5-4000F gas-turbine unit (GTU) and STU consisting of SST-700 and SST-900RH steam turbines. The steam-turbine section of a PGU-420 cogeneration power unit has a single-shaft turbine unit with two SST-800 turbines and one SST-500 turbine giving a power output of N el. STU = 150 MW under condensing conditions.

  4. Wind turbine aerodynamics

    Energy Technology Data Exchange (ETDEWEB)

    Johnson, D.A. [Waterloo Univ., ON (Canada). Dept. of Mechanical Engineering, Wind Energy Group

    2010-07-01

    The need for clean, renewable electricity in remote communities of Canada and the world was discussed in this presentation. The University of Waterloo Wind Energy Laboratory (WEL) performs research in a large scale indoor environment on wind turbines, blade aerodynamics, and aeroacoustics. A key area of research involves developing turbines for remote off-grid communities where climatic conditions are challenging. This presentation outlined research that is underway on wind energy and off-grid renewable energy systems. Many communities in Canada and remote communities in the rest of the world are not connected to the grid and are dependent on other means to supply electrical energy to their community. Remote communities in northern Canada have no road access and diesel is the dominant source of electrical energy for these communities. All of the community supply of diesel comes from brief winter road access or by air. The presentation discussed existing diesel systems and the solution of developing local renewable energy sources such as wind, hydro, biomass, geothermal, and solar power. Research goals, wind energy activities, experimental equipment, and the results were also presented. Research projects have been developed in wind energy; hydrogen generation/storage/utilization; power electronics/microgrid; and community engagement. figs.

  5. Wind turbine power stations

    International Nuclear Information System (INIS)

    Anon.

    1992-11-01

    The Countryside Council for Wales (CCW's) policy on wind turbine power stations needs to be read in the context of CCW's document Energy:Policy and perspectives for the Welsh countryside. This identifies four levels of action aimed at reducing emission of gases which contribute towards the risk of global warming and gases which cause acid deposition. These are: the need for investment in energy efficiency; the need for investment in conventional power generation in order to meet the highest environmental standards; the need for investment in renewable energy; and the need to use land use transportation policies and decisions to ensure energy efficiency and energy conservation. CCW views wind turbine power stations, along with other renewable energy systems, within this framework. CCW's policy is to welcome the exploitation of renewable energy sources as an element in a complete and environmentally sensitive energy policy, subject to the Environmental Assessment of individual schemes and monitoring of the long-term impact of the various technologies involved. (Author)

  6. Aerodynamics of wind turbines emerging topics

    CERN Document Server

    Amano, R S

    2014-01-01

    Focusing on Aerodynamics of Wind Turbines with topics ranging from Fundamental to Application of horizontal axis wind turbines, this book presents advanced topics including: Basic Theory for Wind turbine Blade Aerodynamics, Computational Methods, and Special Structural Reinforcement Technique for Wind Turbine Blades.

  7. Aircraft propulsion and gas turbine engines

    National Research Council Canada - National Science Library

    El-Sayed, Ahmed F

    2008-01-01

    ... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xvii xxxi xxxiii xxxv Part I Aero Engines and Gas Turbines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C...

  8. Mini MAX-DOAS Measurements of Air Pollutants over China

    Science.gov (United States)

    Staadt, Steffen; Hao, Nan; Trautmann, Thomas

    2016-08-01

    This study continues the work of Clémer et al., (2010) and is aimed to improve trace gas retrievals with mini MAX-DOAS measurements in Nanjing. Based on that work, aerosol extinction vertical profiles are retrieved using the bePRO inversion algorithm developed by the Royal Belgian Institute for Space Aeronomy (BIRA- IASB). Afterwards, the tropospheric trace gas vertical profiles and vertical column densities (VCDs) are retrieved by applying the optimal estimation method to the O4 MAX-DOAS measurements. The Profiles for N O2 , S O2 , glyoxal, formaldehyde and nitrous acid are obtained with different results and different settings for the DOAS measurement. The AODs show small positive correlation against the AERONET values. For NO2, the retrieval shows reasonable concentrations in winter as opposed to summer and has small positive correlations with GOME-2 data. The SO2 VCDs are not correlated with the GOME-2 data, due to high uncertainties from MAX-DOAS and satellite retrievals, while the vertical mixing ratios (VMR) show good agreement with in-situ data (SORPES) at Nanjing. Nitrous acid shows a maximum in winter and a minimum in summer, while glyoxal has its maximum in August and September.

  9. Scalable and Flexible Multiview MAX-VAR Canonical Correlation Analysis

    Science.gov (United States)

    Fu, Xiao; Huang, Kejun; Hong, Mingyi; Sidiropoulos, Nicholas D.; So, Anthony Man-Cho

    2017-08-01

    Generalized canonical correlation analysis (GCCA) aims at finding latent low-dimensional common structure from multiple views (feature vectors in different domains) of the same entities. Unlike principal component analysis (PCA) that handles a single view, (G)CCA is able to integrate information from different feature spaces. Here we focus on MAX-VAR GCCA, a popular formulation which has recently gained renewed interest in multilingual processing and speech modeling. The classic MAX-VAR GCCA problem can be solved optimally via eigen-decomposition of a matrix that compounds the (whitened) correlation matrices of the views; but this solution has serious scalability issues, and is not directly amenable to incorporating pertinent structural constraints such as non-negativity and sparsity on the canonical components. We posit regularized MAX-VAR GCCA as a non-convex optimization problem and propose an alternating optimization (AO)-based algorithm to handle it. Our algorithm alternates between {\\em inexact} solutions of a regularized least squares subproblem and a manifold-constrained non-convex subproblem, thereby achieving substantial memory and computational savings. An important benefit of our design is that it can easily handle structure-promoting regularization. We show that the algorithm globally converges to a critical point at a sublinear rate, and approaches a global optimal solution at a linear rate when no regularization is considered. Judiciously designed simulations and large-scale word embedding tasks are employed to showcase the effectiveness of the proposed algorithm.

  10. Potential health impact of wind turbines

    International Nuclear Information System (INIS)

    2010-05-01

    In response to public health concerns about wind turbines, a study was conducted to review the scientific evidence on the potential health effects of wind turbines. Several research questions were examined, including scientific evidence on the potential health impacts of wind turbines; the relationship between wind turbine noise and health; the relationship between low frequency sound, infrasound and health; assessment of exposure to wind turbines; wind turbine health and safety hazards and Ontario wind turbine setbacks; community consultation prior to wind farm construction and data gaps and research needs. The study showed that although some people living near wind turbines reported symptoms such as dizziness, headaches, and sleep disturbance, the scientific evidence available to date does not demonstrate a direct causal link between wind turbine noise and adverse health effects. The sound level from wind turbines at common residential setbacks is not sufficient to cause hearing impairment or other direct health effects, although some people may find it annoying. 41 refs., 1 appendix.

  11. Development of a new time-amplitude converter with tunnel diodes for improving fast neutron spectrometry by time of flight; Realisation d'un nouveau convertisseur temps-amplitude a diodes ''tunnel'' ameliorant la spectrometrie des neutrons rapides par temps de vol

    Energy Technology Data Exchange (ETDEWEB)

    Van Zurk, R [Commissariat a l' Energie Atomique, Grenoble (France). Centre d' Etudes Nucleaires

    1963-11-15

    New time-amplitude converter with Esaki diodes, the events being preselected before analysis, allows for realizing a fast neutron spectrometer by time-of-flight with an 1.5 * 10{sup -9} s overall time resolution for {sup 12}C (n,n') at 14 MeV. (author) [French] Realisation d'un convertisseur temps-amplitude a diodes 'tunnel', avec preselection des impulsions; l'application pour un spectrometre de neutrons rapides a temps-de-vol permet d'obtenir une resolution totale en temps de 1,5 nanoseconde dans la diffusion {sup 12}C (n,n') a 14 MeV. (auteur)

  12. Two stage turbine for rockets

    Science.gov (United States)

    Veres, Joseph P.

    1993-01-01

    The aerodynamic design and rig test evaluation of a small counter-rotating turbine system is described. The advanced turbine airfoils were designed and tested by Pratt & Whitney. The technology represented by this turbine is being developed for a turbopump to be used in an advanced upper stage rocket engine. The advanced engine will use a hydrogen expander cycle and achieve high performance through efficient combustion of hydrogen/oxygen propellants, high combustion pressure, and high area ratio exhaust nozzle expansion. Engine performance goals require that the turbopump drive turbines achieve high efficiency at low gas flow rates. The low mass flow rates and high operating pressures result in very small airfoil heights and diameters. The high efficiency and small size requirements present a challenging turbine design problem. The shrouded axial turbine blades are 50 percent reaction with a maximum thickness to chord ratio near 1. At 6 deg from the tangential direction, the nozzle and blade exit flow angles are well below the traditional design minimum limits. The blade turning angle of 160 deg also exceeds the maximum limits used in traditional turbine designs.

  13. Steam turbines for nuclear power plants

    International Nuclear Information System (INIS)

    Kosyak, Yu.F.

    1978-01-01

    Considered are the peculiarities of the design and operation of steam turbines, condensers and supplementary equipment of steam turbines for nuclear power plants; described are the processes of steam flow in humid-steam turbines, calculation and selection principles of main parameters of heat lines. Designs of the turbines installed at the Charkov turbine plant are described in detail as well as of those developed by leading foreign turbobuilding firms

  14. The physicist. Max Planck and the decay of the world; Der Physiker. Max Planck und das Zerfallen der Welt

    Energy Technology Data Exchange (ETDEWEB)

    Fischer, Ernst Peter

    2010-06-15

    The live of the physicist Max Planck was as exciting, conflicting, and rich on catastrophes as the epoch, in which he lived. Ernst Peter Fischer draws in this fascinatingly told biography the eventful history of the Nobel-price bearer and illustrates simultaneously the unique attainment of Planck, the quantum theory of whom not only revolted the science but also changed fundamentally our picture of the world.

  15. Optimization of hydraulic turbine diffuser

    Directory of Open Access Journals (Sweden)

    Moravec Prokop

    2016-01-01

    Full Text Available Hydraulic turbine diffuser recovers pressure energy from residual kinetic energy on turbine runner outlet. Efficiency of this process is especially important for high specific speed turbines, where almost 50% of available head is utilized within diffuser. Magnitude of the coefficient of pressure recovery can be significantly influenced by designing its proper shape. Present paper focuses on mathematical shape optimization method coupled with CFD. First method is based on direct search Nelder-Mead algorithm, while the second method employs adjoint solver and morphing. Results obtained with both methods are discussed and their advantages/disadvantages summarized.

  16. Active control: Wind turbine model

    DEFF Research Database (Denmark)

    Bindner, H.

    1999-01-01

    This report is a part of the reporting of the work done in the project 'Active Control of Wind Turbines'. This project aim is to develop a simulation model for design of control systems for turbines with pitch control and to use that model to designcontrollers. This report describes the model...... validation as well as parameter estimation. The model includes a simple model of the structure of the turbine including tower and flapwise blade bending,a detailed model of the gear box and induction generator, a linearized aerodynamic model including modelling of induction lag and actuator and sensor models...

  17. Steam turbines for PWR stations

    International Nuclear Information System (INIS)

    Muscroft, J.

    1989-01-01

    The thermodynamic cycle requirements and mechanical design features applying to modern GEC 3000 rev/min steam turbines for pressurised water reactor power stations are reviewed. The most recent developments include machines of 630 MW and 985 MW output which are currently under construction. The importance of service experience with nuclear wet steam turbines associated with a variety of types of water cooled reactor and its relevance to the design of modern 3000 rev/min turbines for pressurised water reactor applications is emphasised. (author)

  18. Turbulence influence on optimum tip speed ratio for a 200 kW vertical axis wind turbine

    Science.gov (United States)

    Möllerström, E.; Eriksson, S.; Goude, A.; Ottermo, F.; Hylander, J.

    2016-09-01

    The influence of turbulence intensity (TI) on the tip speed ratio for maximum power coefficient, here called λCp_max, is studied for a 200 kW VAWT H-rotor using logged data from a 14 month period with the H-rotor operating in wind speeds up to 9 m/s. The TI - λCp_max relation is examined by dividing 10 min mean values in different turbulence intensity ranges and producing multiple CP(λ) curves. A clear positive relation between TI and λCp_max is shown and is further strengthened as possible secondary effects are examined and deemed non-essential. The established relation makes it possible to tune the control strategy to enhance the total efficiency of the turbine.

  19. Augmentative Device Helps Max Speak. PACER Center ACTion Information Sheets. PHP-c75

    Science.gov (United States)

    PACER Center, 2014

    2014-01-01

    This Action Information Sheet follows a family's process of selecting and using augmentative and alternative communication to help their young son, Max, speak. Max is affected by global dyspraxia, which makes learning new motor skills--especially speech--quite difficult. For the first years of his life, Max could not say words. Before he and his…

  20. Superconducting Wind Turbine Generators

    DEFF Research Database (Denmark)

    Mijatovic, Nenad

    A HTS machine could be a way to address some of the technical barriers offshore wind energy is about to face. Due to the superior power density of HTS machines, this technology could become a milestone on which many, including the wind industry, will rely in the future. The work presented...... in this thesis is a part of a larger endeavor, the Superwind project that focused on identifying the potentials that HTS machines could offer to the wind industry and addressing some of the challenges in the process. In order to identify these challenges, I have design and constructed a HTS machine experimental...... setup which is made to serve as precursor, leading towards an optimized HTS machine concept proposed for wind turbines. In part, the work presented in this thesis will focus on the description of the experimental setup and reasoning behind the choices made during the design. The setup comprises from...

  1. Sprayed skin turbine component

    Science.gov (United States)

    Allen, David B

    2013-06-04

    Fabricating a turbine component (50) by casting a core structure (30), forming an array of pits (24) in an outer surface (32) of the core structure, depositing a transient liquid phase (TLP) material (40) on the outer surface of the core structure, the TLP containing a melting-point depressant, depositing a skin (42) on the outer surface of the core structure over the TLP material, and heating the assembly, thus forming both a diffusion bond and a mechanical interlock between the skin and the core structure. The heating diffuses the melting-point depressant away from the interface. Subsurface cooling channels (35) may be formed by forming grooves (34) in the outer surface of the core structure, filling the grooves with a fugitive filler (36), depositing and bonding the skin (42), then removing the fugitive material.

  2. Multiple Turbine Wakes

    DEFF Research Database (Denmark)

    Machefaux, Ewan; Mann, Jakob

    and to obtain an estimate of the wake expansion in a fixed frame of reference. A comparison of selected datasets from the campaign showed good far wake agreements of mean wake expansion with Actuator Line CFD computations and simpler engineering models. An empirical relationship, relating maximum wake induction...... for modeling the resulting double wake deficit is only relevant at high turbine thrust coefficients. For high wind speed and low thrust coefficient, linear summation should be primarily used. The first iteration of a new engineering model capable of modeling the overlapped wake deficit is formulated and its...... measurement and simulation is seen in both the fixed and the meandering frame of reference. A benchmark of several wake accumulation models is performed as a basis for the subsequent development of an engineering model for wake interaction.Finally, the validated numerical CFD model is used as part...

  3. Aircraft gas turbines

    Energy Technology Data Exchange (ETDEWEB)

    Arai, M [Kawasaki Heavy Industries Ltd., Kobe (Japan)

    1995-03-01

    Recently the international relationship has been playing an important role in the research, development and production of the aircraft gas turbine. The YSX, which is supposed to be the 100-seat class commercial aircraft, has been planned by Japan Aircraft Development (JADC) as an international cooperative project. Recently many western aeroengine companies have offered the collaboration of small turbofan engines which would be installed on YSX to Japanese aeroengine companies (IHI, KHI and MHI). The YSX is powered by 16,000-20,000 1bs thrust class engines. As for medium turbofan engine (V2500), the V 2500 family of 22,000 to 30,000 1bs thrust has been developed since 1983 through international collaboration by seven aeroengine companies in five nations. In this paper, the recent Japan`s activities of the research, development and production with viewing the world-wide movement, are described. 6 figs.

  4. Wind turbine airfoil catalogue

    DEFF Research Database (Denmark)

    Bertagnolio, F.; Sørensen, Niels N.; Johansen, Jeppe

    2001-01-01

    The aim of this work is two-sided. Firstly, experimental results obtained for numerous sets of airfoil measurements (mainly intended for wind turbine applications) are collected and compared with computational results from the 2D Navier-Stokes solverEllipSys2D, as well as results from the panel...... method code XFOIL. Secondly, we are interested in validating the code EllipSys2D and finding out for which airfoils it does not perform well compared to the experiments, as well as why, when it does so. Theairfoils are classified according to the agreement between the numerical results and experimental...... data. A study correlating the available data and this classification is performed. It is found that transition modelling is to a large extent responsible forthe poor quality of the computational results for most of the considered airfoils. The transition model mechanism that leads...

  5. Réordonner l’espace et le temps :

    Directory of Open Access Journals (Sweden)

    Nicolas Senil

    2011-07-01

    Full Text Available La multiplication des objets, des acteurs et des logiques de la patrimonialisation génère un brouillage de plus en plus important sur la force et le sens de nos rapports au passé. Dans ce contexte, cet article se propose de réfléchir aux processus d’émergence de nouveaux objets patrimoniaux et aux conséquences de ces mobilisations. Il s’appuie sur l’analyse comparée de deux objets symétriques et tous deux patrimonialisés : la grotte Chauvet et le viaduc de Millau. En montrant que chaque objet est projeté dans la dimension spatiale ou temporelle dont il se trouve a priori exclu lors de son invention, l’analyse rappelle la nécessité d’intégrer une approche patrimoniale à notre lecture des dynamiques territoriales. Elle propose alors l’idée que ces mouvements croisés représentent une reconstruction d’un espace-temps maitrisé, nécessaire pour répondre au problème renouvelé de notre société : sa durabilité.The multiplication of objects, actors and underlying rationales of heritage development, or patrimonialisation, is increasingly blurring the strength and meaning of our relationship with the past. The aim of this article is to reflect on the processes involved in the emergence of new heritage objects and on the consequences of these developments. The article is based on a comparative analysis of two symmetric objects, both of which have been the subject of heritage development processes: the Chauvet cave and the Millau viaduct in Southern France. By showing that each object is projected in the spatial or temporal dimension from which it was a priori excluded at the time of its discovery, the analysis demonstrates the necessity of integrating a heritage approach to our understanding of territorial dynamics. The analysis suggests that the interplay of territorialisation and heritage development processes represents a reconstruction of a controlled time-space, a prerequisite for addressing a recurring problem

  6. Le « problème » de l’adolescence : le loisir contre le temps libre

    Directory of Open Access Journals (Sweden)

    Joël Zaffran

    2011-04-01

    Full Text Available En matière de politique publique du loisir des adolescents, deux constats s’imposent : d’une part les dispositifs d’occupation du temps libre sont légion et pléthore de contrats temps libre sont subventionnés par les communes et les collectivités territoriales ; alors qu’un large éventail d’activités est offert aux adolescents pendant le temps périscolaire, les taux de fréquentation restent désespérément faibles d’autre part. Pour cerner les enjeux politiques du loisir des adolescents ainsi que les raisons de la désaffection des structures de loisirs, l’article puise à une diversité de matériaux afin de procéder à une classification des loisirs des adolescent(es à partir du croisement de deux dimensions analytiques : la forme scolaire et l’encadrement. Ces deux axes permettent d’isoler trois types de loisir présenté successivement comme un temps de la perfection, un temps de la formation et un temps de la régulation. La matrice proposée permet ensuite de cerner la nature du temps libre qui, bien que complémentaire aux trois temps précédents, apparaît comme un temps de la subjectivation et ce faisant comme une temporalité impérieuse.The “problem” of teenage: leisure against free timeTwo reports are essential about teenager’s public policy of the leisure: on the one hand the devices of occupation of free time are legion and a plethora of contracts free time are subsidized by cities council and local governments; whereas a large range of activities is offered to the teenagers during extra-curricular time, the rates of frequentation remain hopelessly weak in addition. To determine the policy issues of teenager’s leisure as well as the reasons of the disaffection of the communities centres, the article use a material diversity in order to carry out a classification of teenager’s leisure starting from the crossing of two analytical dimensions: the school form and the social control. These two

  7. El valor del temps en els processos educatius d'integració i inclusió social

    OpenAIRE

    Alonso Pardo, Paula; Varela Crespo, Laura; Teijeiro Bóo, Yésica

    2011-01-01

    L’estudi dels temps educatius i socials des d’una perspectiva d’inclusió social i d’atenció a la diversitat suposa nous reptes per a la Pedagogia- Educació Social, tant pels múltiples elements que conformen les pràctiques educatives com per la coexistència d’identitats diferenciades. Concretament, referint-nos a la població immigrant, les accions socioeducatives orientades cap a la convivència i la inclusió han de trobar en l’escola i en els serveis socials importants referents contextuals pe...

  8. Quantification des cellules viables de P. phosphoreum dans les pavés de saumon cru par PCR temps reel

    DEFF Research Database (Denmark)

    Macé, Sabine; Mamlouk, Kelthoum; Chipchakova, Stoyka

    ’altération. Par conséquent, nous avons développé une méthode de PCR temps réel spécifique combinée avec une étape de traitement au PMA pour quantifier les cellules viable de P.phosphoreum dans le saumon cru conditionné sous atmosphère modifiée. Les amorces spécifiques ont été dessinées pour amplifier un fragment...

  9. Gas Turbine Engine Having Fan Rotor Driven by Turbine Exhaust and with a Bypass

    Science.gov (United States)

    Suciu, Gabriel L. (Inventor); Chandler, Jesse M. (Inventor)

    2016-01-01

    A gas turbine engine has a core engine incorporating a core engine turbine. A fan rotor is driven by a fan rotor turbine. The fan rotor turbine is in the path of gases downstream from the core engine turbine. A bypass door is moveable from a closed position at which the gases from the core engine turbine pass over the fan rotor turbine, and moveable to a bypass position at which the gases are directed away from the fan rotor turbine. An aircraft is also disclosed.

  10. High-efficiency wind turbine

    Science.gov (United States)

    Hein, L. A.; Myers, W. N.

    1980-01-01

    Vertical axis wind turbine incorporates several unique features to extract more energy from wind increasing efficiency 20% over conventional propeller driven units. System also features devices that utilize solar energy or chimney effluents during periods of no wind.

  11. Probabilistic Design of Wind Turbines

    DEFF Research Database (Denmark)

    Sørensen, John Dalsgaard; Toft, H.S.

    2010-01-01

    Probabilistic design of wind turbines requires definition of the structural elements to be included in the probabilistic basis: e.g., blades, tower, foundation; identification of important failure modes; careful stochastic modeling of the uncertain parameters; recommendations for target reliability....... It is described how uncertainties in wind turbine design related to computational models, statistical data from test specimens, results from a few full-scale tests and from prototype wind turbines can be accounted for using the Maximum Likelihood Method and a Bayesian approach. Assessment of the optimal...... reliability level by cost-benefit optimization is illustrated by an offshore wind turbine example. Uncertainty modeling is illustrated by an example where physical, statistical and model uncertainties are estimated....

  12. Reliability Assessment Of Wind Turbines

    DEFF Research Database (Denmark)

    Sørensen, John Dalsgaard

    2014-01-01

    Reduction of cost of energy for wind turbines are very important in order to make wind energy competitive compared to other energy sources. Therefore the turbine components should be designed to have sufficient reliability but also not be too costly (and safe). This paper presents models...... for uncertainty modeling and reliability assessment of especially the structural components such as tower, blades, substructure and foundation. But since the function of a wind turbine is highly dependent on many electrical and mechanical components as well as a control system also reliability aspects...... of these components are discussed and it is described how there reliability influences the reliability of the structural components. Two illustrative examples are presented considering uncertainty modeling, reliability assessment and calibration of partial safety factors for structural wind turbine components exposed...

  13. Boiler-turbine life extension

    Energy Technology Data Exchange (ETDEWEB)

    Natzkov, S. [TOTEMA, Ltd., Sofia (Bulgaria); Nikolov, M. [CERB, Sofia (Bulgaria)

    1995-12-01

    The design life of the main power equipment-boilers and turbines is about 105 working hours. The possibilities for life extension are after normatively regulated control tests. The diagnostics and methodology for Boilers and Turbines Elements Remaining Life Assessment using up to date computer programs, destructive and nondestructive control of metal of key elements of units equipment, metal creep and low cycle fatigue calculations. As well as data for most common damages and some technical decisions for elements life extension are presented.

  14. CFD analysis of a Darrieus wind turbine

    Science.gov (United States)

    Niculescu, M. L.; Cojocaru, M. G.; Pricop, M. V.; Pepelea, D.; Dumitrache, A.; Crunteanu, D. E.

    2017-07-01

    The Darrieus wind turbine has some advantages over the horizontal-axis wind turbine. Firstly, its tip speed ratio is lower than that of the horizontal-axis wind turbine and, therefore, its noise is smaller, privileging their placement near populated areas. Secondly, the Darrieus wind turbine does needs no orientation mechanism with respect to wind direction in contrast to the horizontal-axis wind turbine. However, the efficiency of the Darrieus wind turbine is lower than that of the horizontal-axis wind turbine since its aerodynamics is much more complex. With the advances in computational fluids and computers, it is possible to simulate the Darrieus wind turbine more accurately to understand better its aerodynamics. For these reasons, the present papers deals with the computational aerodynamics of a Darrieus wind turbine applying the state of the art of CFD methods (anisotropic turbulence models, transition from laminar to turbulent, scale adaptive simulation) to better understand its unsteady behavior.

  15. An Analysis of the Max-Min Texture Measure.

    Science.gov (United States)

    1982-01-01

    PANC 33 D2 Confusion Matrices for Scene A, IR 34 D3 Confusion Matrices for Scene B, PANC 35 D4 Confusion Matrices for Scene B, IR 36 D5 Confusion...Matrices for Scene C, PANC 37 D6 Confusion Matrices for Scene C, IR 38 D7 Confusion Matrices for Scene E, PANC 39 D8 Confusion Matrices for Scene E, IR 40...D9 Confusion Matrices for Scene H, PANC 41 DIO Confusion Matrices for Scene H, JR 42 3 .D 10CnuinMtie o cn ,IR4 AN ANALYSIS OF THE MAX-MIN TEXTURE

  16. Max Weber o el enigma emocional del origen del capitalismo

    OpenAIRE

    EDUARDO BERICAT ALASTUEY

    2001-01-01

    Se analiza el trabajo clave de Max Weber, La ética protestante y el espíritu del capitalismo, desde la perspectiva de la Sociología de las Emociones. Aunque la inclusión de las emociones de los fenómenos sociales es clave para entender la idea de Weber sobre el dogma de la predestinación, los sociólogos han trivializado el papel de la emoción. Tras detallar la creencia de Weber en que el espíritu del capitalismo parte del conocimiento de que el destino del hombre está predeterminado (la ética...

  17. 3ds Max design architectural visualization for intermediate users

    CERN Document Server

    Smith, Brian L

    2012-01-01

    Learn time-saving techniques and tested production-ready tips for maximum speed and efficiency in creating professional-level architectural visualizations in 3ds Max. Move from intermediate to an advanced level with specific and comprehensive instruction with this collaboration from nine different authors from around the world. Get their experience and skills in this full-color book, which not only teaches more advanced features, but also demonstrates the practical applications of those features to get readers ready for a real production environment. Fully updated for the most recent version o

  18. Min-Max decoding for non binary LDPC codes

    OpenAIRE

    Savin, Valentin

    2008-01-01

    Iterative decoding of non-binary LDPC codes is currently performed using either the Sum-Product or the Min-Sum algorithms or slightly different versions of them. In this paper, several low-complexity quasi-optimal iterative algorithms are proposed for decoding non-binary codes. The Min-Max algorithm is one of them and it has the benefit of two possible LLR domain implementations: a standard implementation, whose complexity scales as the square of the Galois field's cardinality and a reduced c...

  19. Chain rules for smooth min-and max-entropies

    DEFF Research Database (Denmark)

    Vitanov, Alexande; Dupont-Dupuis, Fréderic; Tomamichel, Marco

    2013-01-01

    The chain rule for the Shannon and von Neumann en- tropy, which relates the total entropy of a system to the entropies of its parts, is of central importance to information theory. Here, we consider the chain rule for the more general smooth min- and max-entropies, used in one-shot in formation...... theory. For these en- tropy measures, the chain rule no longer holds as an equality. How- ever, the standard chain rule for the von Neum ann entropy is re- trieved asymptotically when evaluating the smooth entropies for many identical and independently distributed states....

  20. Nanocrystalline MAX/Mg Composites with Exceptional Properties

    Science.gov (United States)

    2017-01-04

    hardness was 3.4±0.3 GPa, and the ultimate compressive strengths was 1028±5 MPa. The enhancements in elastic and mechanical properties are attributed to...Barsoum. Enthalpy of Formation and Thermodynamic Parameters of the MAX Phase, V2AlC., J. Alloy Compds., ( ): 218. doi: Babak Anasori, El’ad N. Caspi...Paper TOTAL: 08/28/2012 08/28/2012 Received Book 1.00 4.00 Babak Anasori, Michel W. Barsoum. ON THE EFFECT OF Ti2AlC ON THE FORMATION OF THERMALLY

  1. Max Saunders, Ford Madox Ford: a Dual Life

    OpenAIRE

    Brasme, Isabelle

    2014-01-01

    Ford Madox Ford: A Dual Life is a welcome paperback reprint of Max Saunders’s authoritative monograph, which was initially published in 1996. The history of criticism and reception for Ford Madox Ford’s writing has been far from straightforward from the early twentieth to the early twenty-first century. Ford Hermann Hueffer, then Ford Madox Hueffer, then Ford Madox Ford (1873-1939), was at the centre of intellectual circles in the first three decades of the twentieth century. A prevalent figu...

  2. Variable Pitch Darrieus Water Turbines

    Science.gov (United States)

    Kirke, Brian; Lazauskas, Leo

    In recent years the Darrieus wind turbine concept has been adapted for use in water, either as a hydrokinetic turbine converting the kinetic energy of a moving fluid in open flow like an underwater wind turbine, or in a low head or ducted arrangement where flow is confined, streamtube expansion is controlled and efficiency is not subject to the Betz limit. Conventional fixed pitch Darrieus turbines suffer from two drawbacks, (i) low starting torque and (ii) shaking due to cyclical variations in blade angle of attack. Ventilation and cavitation can also cause problems in water turbines when blade velocities are high. Shaking can be largely overcome by the use of helical blades, but these do not produce large starting torque. Variable pitch can produce high starting torque and high efficiency, and by suitable choice of pitch regime, shaking can be minimized but not entirely eliminated. Ventilation can be prevented by avoiding operation close to a free surface, and cavitation can be prevented by limiting blade velocities. This paper summarizes recent developments in Darrieus water turbines, some problems and some possible solutions.

  3. Noise immission from wind turbines

    International Nuclear Information System (INIS)

    1999-01-01

    The project has dealt with practical ways to reduce the influence of background noise caused by wind acting on the measuring microphones. The uncertainty of measured noise emission (source strength) has been investigated. The main activity was a Round Robin Test involving measurements by five laboratories at the same wind turbine. Each laboratory brought its own instrumentation and performed the measurements and analyses according to their interpretation. The tonality of wind turbine noise is an essential component of the noise impact on the environment. In the present project the uncertainty in the newest existing methods for assessing tonality was investigated. The project included noise propagation measurements in different weather conditions around wind turbines situated in different types of terrain. The results were used to validate a noise propagation model developed in the project. Finally, the project also included a study with listeners evaluating recordings of wind turbine noise. The results are intended as guidance for wind turbine manufacturers in identifying the aspects of wind turbine noise most important to annoyance. (author)

  4. Active control: Wind turbine model

    Energy Technology Data Exchange (ETDEWEB)

    Bindner, Henrik

    1999-07-01

    This report is a part of the reporting of the work done in the project `Active Control of Wind Turbines`. This project aim is to develop a simulation model for design of control systems for turbines with pitch control and to use that model to design controllers. This report describes the model developed for controller design and analysis. Emphasis has been put on establishment of simple models describing the dynamic behavior of the wind turbine in adequate details for controller design. This has been done with extensive use of measurements as the basis for selection of model complexity and model validation as well as parameter estimation. The model includes a simple model of the structure of the turbine including tower and flapwise blade bending, a detailed model of the gear box and induction generator, a linearized aerodynamic model including modelling of induction lag and actuator and sensor models. The models are all formulated as linear differential equations. The models are validated through comparisons with measurements performed on a Vestas WD 34 400 kW wind turbine. It is shown from a control point of view simple linear models can be used to describe the dynamic behavior of a pitch controlled wind turbine. The model and the measurements corresponds well in the relevant frequency range. The developed model is therefore applicable for controller design. (au) EFP-91. 18 ills., 22 refs.

  5. Improving fish survival through turbines

    International Nuclear Information System (INIS)

    Ferguson, J.W.

    1993-01-01

    Much of what is known about fish passage through hydroturbines has been developed by studying migratory species of fish passing through large Kaplan turbine units. A review of the literature on previous fish passage research presented in the accompanying story illustrates that studies have focused on determining mortality levels, rather than identifying the causal mechanism involved. There is a need for understanding how turbine designs could be altered to improve fish passage conditions, how to retrofit existing units, and how proposed hydro plant operational changes may affect fish survival. The US Army Corps of Engineers has developed a research program to define biologically based engineering criteria for improving fish passage conditions. Turbine designs incorporating these criteria can be evaluated for their effects on fish survival, engineering issues, costs, and power production. The research program has the following objectives: To gain a thorough knowledge of the mechanisms of fish mortality; To define the biological sensitivities of key fish species to these mechanisms of mortality; To develop new turbine design criteria to reduce fish mortality; To construct prototype turbine designs, and to test these designs for fish passage, hydro-mechanical operation, and power production; and To identify construction and power costs associated with new turbine designs

  6. Lightning protection of wind turbines

    Energy Technology Data Exchange (ETDEWEB)

    Soerensen, T; Brask, M H [DEFU (Denmark); Jensen, F V; Raben, N [SEAS (Denmark); Saxov, J [Nordjyllandsvaerket (Denmark); Nielsen, L [Vestkraft (Denmark); Soerensen, P E [Risoe National Lab. (Denmark)

    1999-03-01

    Lightning damage to wind turbines is a serious problem for Danish power companies, who have experienced some cases with very costly lightning damage and a large number of cases with minor damage. The most costly cases include one catastrophic damage to an entire wind turbine, and several cases of destruction of blades, main bearings, generators and control systems. Over the years there have been several hundreds of cases with minor damage - typically damage and interruptions of the control and communication systems, or the power systems. The Danish power companies anticipate that the lightning threat will be even bigger for the large off-shore wind turbine installations that are currently being planned in Denmark. Furthermore, it is known from the off-shore wind turbines at Vindeby in Denmark that the costs of inspection and particularly repair work must be expected to be much higher off-shore as compared to wind turbines on land. These considerations was the background for a two year project concerned with investigation of lighting damages and with the formulation of a DEFU Recommendation for lightning protection of wind turbines, which was published in January 1999. The project was funded by the Danish power companies Elsam, Eltra, Elkraft and by DEFU. (au)

  7. Collecting Currents with Water Turbines

    Science.gov (United States)

    Allen, J.; Allen, S.

    2017-12-01

    Our science poster is inspired by Florida Atlantic University's recent program to develop three types of renewable energy. They are using water turbines and the Gulf Stream Current to produce a renewable energy source. Wave, tidal and current driven energy. Our poster is called "Collecting Currents with Water Turbines". In our science poster, the purpose was to see which turbine design could produce the most power. We tested three different variables, the number of blades (four, six, and eight), the material of the blades and the shape of the blades. To test which number of blades produced the most power we cut slits into a cork. We used plastic from a soda bottle to make the blades and then we put the blades in the cork to make the turbines. We observed each blade and how much time it took for the water turbines to pull up 5 pennies. Currently water turbines are used in dams to make hydroelectric energy. But with FAU we could understand how to harness the Gulf Stream current off Florida's coast we could soon have new forms of renewable energy.

  8. Nanostructured plasma etched, magnetron sputtered nanolaminar Cr2AlC MAX phase thin films

    International Nuclear Information System (INIS)

    Grieseler, Rolf; Hähnlein, Bernd; Stubenrauch, Mike; Kups, Thomas; Wilke, Marcus; Hopfeld, Marcus; Pezoldt, Jörg; Schaaf, Peter

    2014-01-01

    The knowledge of the mechanical properties of new materials determines essentially their usability and functionality when used in micro- and nanostructures. MAX phases are new and highly interesting materials due to their unique combination of materials properties. In this article a new method for producing the Cr 2 AlC MAX phase is presented. Thin film elemental multilayer deposition and subsequent rapid thermal annealing forms the MAX phase within seconds. Additionally, free standing microstructures (beams and cantilevers) based on this MAX phase films are prepared by plasma etching. The mechanical properties of these MAX phase microstructures are investigated

  9. Model Predictive Control of Wind Turbines

    DEFF Research Database (Denmark)

    Henriksen, Lars Christian

    Wind turbines play a major role in the transformation from a fossil fuel based energy production to a more sustainable production of energy. Total-cost-of-ownership is an important parameter when investors decide in which energy technology they should place their capital. Modern wind turbines...... the need for maintenance of the wind turbine. Either way, better total-cost-of-ownership for wind turbine operators can be achieved by improved control of the wind turbines. Wind turbine control can be improved in two ways, by improving the model on which the controller bases its design or by improving...

  10. Tapered composite likelihood for spatial max-stable models

    KAUST Repository

    Sang, Huiyan

    2014-05-01

    Spatial extreme value analysis is useful to environmental studies, in which extreme value phenomena are of interest and meaningful spatial patterns can be discerned. Max-stable process models are able to describe such phenomena. This class of models is asymptotically justified to characterize the spatial dependence among extremes. However, likelihood inference is challenging for such models because their corresponding joint likelihood is unavailable and only bivariate or trivariate distributions are known. In this paper, we propose a tapered composite likelihood approach by utilizing lower dimensional marginal likelihoods for inference on parameters of various max-stable process models. We consider a weighting strategy based on a "taper range" to exclude distant pairs or triples. The "optimal taper range" is selected to maximize various measures of the Godambe information associated with the tapered composite likelihood function. This method substantially reduces the computational cost and improves the efficiency over equally weighted composite likelihood estimators. We illustrate its utility with simulation experiments and an analysis of rainfall data in Switzerland.

  11. Cosmological Constraints From SDSS MaxBCG Cluster Abundances

    International Nuclear Information System (INIS)

    Rozo, Eduardo; Wechsler, Risa H.; KICP, Chicago; Koester, Benjamin P.; McKay, Timothy A.; Evrard, August E.; Johnston, David; Sheldon, Erin S.; Annis, James; Frieman, Joshua A.

    2007-01-01

    We perform a maximum likelihood analysis of the cluster abundance measured in the SDSS using the maxBCG cluster finding algorithm. Our analysis is aimed at constraining the power spectrum normalization σ 8 , and assumes flat cosmologies with a scale invariant spectrum, massless neutrinos, and CMB and supernova priors (Omega) m h 2 = 0.128 ± 0.01 and h = 0.72 ± 0.05 respectively. Following the method described in the companion paper Rozo et al. (2007), we derive σ 8 = 0.92 ± 0.10 (1σ) after marginalizing over all major systematic uncertainties. We place strong lower limits on the normalization, σ 8 > 0.76 (95% CL) (> 0.68 at 99% CL). We also find that our analysis favors relatively low values for the slope of the Halo Occupation Distribution (HOD), α = 0.83 ± 0.06. The uncertainties of these determinations will substantially improve upon completion of an ongoing campaign to estimate dynamical, weak lensing, and X-ray cluster masses in the SDSS maxBCG cluster sample

  12. [Max Hirsch founder of rheumatology in Germany: banished and murdered].

    Science.gov (United States)

    Keitel, W

    2014-08-01

    The Jewish physician and scientist Dr. Max Hirsch (1875-1941) made a substantial contribution to consolidation of the foundations of his professional discipline, balneology, and in particular developed the social aspects. He recognized the economic significance of diseases of the musculoskeletal system very early on and gathered important ideas from abroad. Together with the department head in the Prussian Ministry of Education and Cultural Affairs, the Privy Councillor Prof. Dr. Eduard Dietrich and later alone, he was editor of various balneological journals. He worked as general secretary of the Deutsche Gesellschaft für Rheumatologie (German Society of Rheumatology) from the beginning of its existence (1927) and created the publication series Veröffentlichungen der Deutschen Gesellschaft für Rheumabekämpfung (Publications of the German Society against Rheumatism) and Rheuma-Jahrbuch (Annual review of rheumatology) in 1929, 1930 and 1931 and organized seven rheumatology congresses up to 1933. After the accession to power of the National Socialists, Max Hirsch and Eduard Dietrich were deposed from office. Hirsch emigrated to Latvia via Switzerland and the Soviet Union with his wife and one son where they were murdered in the course of the Jewish pogrom. The second son escaped with his family to Sweden.

  13. Pseudogap and cuprate superconductivity: MaxEnt-μSR studies

    International Nuclear Information System (INIS)

    Boekema, C.; Schwartz, R.; Love, A.; Browne, M.C.

    2013-01-01

    Highlights: • A magnetic origin of cuprate superconductivity is plausible. • Cuprate loop currents are observed, close to predictions. • Pseudogap effects are seen above and below T c . -- Abstract: The basic physics of cuprate superconductivity is still much deliberated after 27 years of research. In contrast to phononic or polaronic roots, Varma’s theory promotes a magnetic origin. To probe cuprate magnetism, we examine zero field (ZF) muon-spin-rotation (μSR) data of RBa 2 Cu 3 O 7−δ (RBCO; R = Gd, Eu) especially near T c . Possible weak effects are analyzed using Maximum Entropy (MaxEnt, ME) to transform our μSR time series. Concerning predicted pseudogap loop currents, we have observed μSR signals in zero field for GdBCO above and now also below T c . These are near predicted fields of about 100 Oe. Using MaxEnt, we analyze transverse field (TF) μSR data of optimal doped EuBCO. Our focus is also on a temperature interval above T c to comprehend precursor effects. Our results point toward magnetic roots of cuprate superconductivity

  14. Effective Bandwidth Allocation for WiMAX Mesh Network

    Directory of Open Access Journals (Sweden)

    Hung-Chin Jang

    2010-04-01

    Full Text Available The aim of this paper is to reduce the media access delay in a WiMAX mesh network. We observe that as the number of subscriber stations (SS in a neighborhood increases, the processes of transmission opportunity (TO competition and 3- way handshake are easy to fail. This may degrade transmission efficiency and increase packet transmission delay. Besides, the minislot allocation defined in the WiMAX mesh mode may cause many lower priority services reserve earlier minislots than that of higher priority services like rtPS. This may cause great negative impact on delay-sensitive traffic. In this paper, we design a QoS classifier to enqueue packets according to different QoS service classes, present a dynamic holdoff exponent mechanism to reduce control subframe delay, and propose a Neighborhood-Based Minislot Allocation (NBMA mechanism to reduce data subframe delay. Simulations show that the proposed methodology outperforms that of IEEE 802.16 and Baye's DynExp in delay, jitter and throughput.

  15. Los juegos narrativos de Max Aub en Juego de cartas

    Directory of Open Access Journals (Sweden)

    Valles Calatrava, José R.

    2007-12-01

    Full Text Available After reviewing the dates of writing and edition, the illustrations of the cards and the different thematic relationships among the 106 epistles that integrate Juego de Cartas (1964 by Max Aub, this article successively studies the playful and experimental dimensions of the novel and its opened plot, analyzing in a detailed way the narrative technical procedures used by Aub in its composition: dissociation of the author and apocryphal play, limitless retextualization of story (scattered text and opened montage, greatest interactivity and kaleidoscopic design.Tras examinar las fechas de escritura y publicación, las ilustraciones de los naipes y las vinculaciones temáticas de las 106 epístolas que integran la obra de Max Aub Juego de cartas (1964, este artículo estudia las dimensiones lúdica y experimental de la novela y su estructura abierta, analizando sucesivamente de modo detallado los procedimientos técnicos narrativos empleados por Aub en su composición: disociación autoral y presencia del apócrifo, retextualización ilimitada de la historia narrativa (texto diseminado y montaje abierto, máxima interactividad, diseño caleidoscópico.

  16. Tapered composite likelihood for spatial max-stable models

    KAUST Repository

    Sang, Huiyan; Genton, Marc G.

    2014-01-01

    Spatial extreme value analysis is useful to environmental studies, in which extreme value phenomena are of interest and meaningful spatial patterns can be discerned. Max-stable process models are able to describe such phenomena. This class of models is asymptotically justified to characterize the spatial dependence among extremes. However, likelihood inference is challenging for such models because their corresponding joint likelihood is unavailable and only bivariate or trivariate distributions are known. In this paper, we propose a tapered composite likelihood approach by utilizing lower dimensional marginal likelihoods for inference on parameters of various max-stable process models. We consider a weighting strategy based on a "taper range" to exclude distant pairs or triples. The "optimal taper range" is selected to maximize various measures of the Godambe information associated with the tapered composite likelihood function. This method substantially reduces the computational cost and improves the efficiency over equally weighted composite likelihood estimators. We illustrate its utility with simulation experiments and an analysis of rainfall data in Switzerland.

  17. Cosmological Constraints from the SDSS maxBCG Cluster Catalog

    Energy Technology Data Exchange (ETDEWEB)

    Rozo, Eduardo; /CCAPP; Wechsler, Risa H.; /KIPAC, Menlo Park /SLAC; Rykoff, Eli S.; /UC, Santa Barbara; Annis, James T.; /Fermilab; Becker, Matthew R.; /Chicago U. /KICP, Chicago; Evrard, August E.; /Michigan U. /Michigan U., MCTP; Frieman, Joshua A.; /Fermilab /KICP, Chicago /Chicago U.; Hansen, Sarah M.; /UC, Santa Cruz; Hao, Jia; /Michigan U.; Johnston, David E.; /Northwestern U.; Koester, Benjamin P.; /KICP, Chicago /Chicago U.; McKay, Timothy A.; /Michigan U. /Michigan U., MCTP; Sheldon, Erin S.; /Brookhaven; Weinberg, David H.; /CCAPP /Ohio State U.

    2009-08-03

    We use the abundance and weak lensing mass measurements of the SDSS maxBCG cluster catalog to simultaneously constrain cosmology and the richness-mass relation of the clusters. Assuming a flat {Lambda}CDM cosmology, we find {sigma}{sub 8}({Omega}{sub m}/0.25){sup 0.41} = 0.832 {+-} 0.033 after marginalization over all systematics. In common with previous studies, our error budget is dominated by systematic uncertainties, the primary two being the absolute mass scale of the weak lensing masses of the maxBCG clusters, and uncertainty in the scatter of the richness-mass relation. Our constraints are fully consistent with the WMAP five-year data, and in a joint analysis we find {sigma}{sub 8} = 0.807 {+-} 0.020 and {Omega}{sub m} = 0.265 {+-} 0.016, an improvement of nearly a factor of two relative to WMAP5 alone. Our results are also in excellent agreement with and comparable in precision to the latest cosmological constraints from X-ray cluster abundances. The remarkable consistency among these results demonstrates that cluster abundance constraints are not only tight but also robust, and highlight the power of optically-selected cluster samples to produce precision constraints on cosmological parameters.

  18. Max dD/Dt: A Novel Parameter to Assess Fetal Cardiac Contractility and a Substitute for Max dP/Dt.

    Science.gov (United States)

    Fujita, Yasuyuki; Kiyokoba, Ryo; Yumoto, Yasuo; Kato, Kiyoko

    2018-07-01

    Aortic pulse waveforms are composed of a forward wave from the heart and a reflection wave from the periphery. We focused on this forward wave and suggested a new parameter, the maximum slope of aortic pulse waveforms (max dD/dt), for fetal cardiac contractility. Max dD/dt was calculated from fetal aortic pulse waveforms recorded with an echo-tracking system. A normal range of max dD/dt was constructed in 105 healthy fetuses using linear regression analysis. Twenty-two fetuses with suspected fetal cardiac dysfunction were divided into normal and decreased max dD/dt groups, and their clinical parameters were compared. Max dD/dt of aortic pulse waveforms increased linearly with advancing gestational age (r = 0.93). The decreased max dD/dt was associated with abnormal cardiotocography findings and short- and long-term prognosis. In conclusion, max dD/dt calculated from the aortic pulse waveforms in fetuses can substitute for max dP/dt, an index of cardiac contractility in adults. Copyright © 2018 World Federation for Ultrasound in Medicine and Biology. Published by Elsevier Inc. All rights reserved.

  19. OaMAX2 of Orobanche aegyptiaca and Arabidopsis AtMAX2 share conserved functions in both development and drought responses.

    Science.gov (United States)

    Li, Weiqiang; Nguyen, Kien Huu; Watanabe, Yasuko; Yamaguchi, Shinjiro; Tran, Lam-Son Phan

    2016-09-16

    Previous studies in Arabidopsis reported that the MAX2 (more axillary growth 2) gene is a component of the strigolactone (SL) signaling pathway, which regulates a wide range of biological processes, from plant growth and development to environmental stress responses. Orobanche aegyptiaca is a harmful parasitic plant for many economically important crops. Seed germination of O. aegyptiaca is very sensitive to SLs, suggesting that O. aegyptiaca may contain components of the SL signaling pathway. To investigate this hypothesis, we identified and cloned a MAX2 ortholog from O. aegyptiaca for complementation analyses using the Arabidopsis Atmax2 mutant. The so-called OaMAX2 gene could rescue phenotypes of the Atmax2 mutant in various tested developmental aspects, including seed germination, shoot branching, leaf senescence and growth and development of hypocotyl, root hair, primary root and lateral root. More importantly, OaMAX2 could enhance the drought tolerance of Atmax2 mutant, suggesting its ability to restore the drought-tolerant phenotype of mutant plants defected in AtMAX2 function. Thus, this study provides genetic evidence that the functions of the MAX2 orthologs, and perhaps the MAX2 signaling pathways, are conserved in parasitic and non-parasitic plants. Furthermore, the results of our study enable us to develop a strategy to fight against parasitic plants by suppressing the MAX signaling, which ultimately leads to enhanced productivity of crop plants. Copyright © 2016 Elsevier Inc. All rights reserved.

  20. Multiple variables explain the variability in the decrement in VO2max during acute hypobaric hypoxia.

    Science.gov (United States)

    Robergs, R A; Quintana, R; Parker, D L; Frankel, C C

    1998-06-01

    We used multiple regression analyses to determine the relationships between the decrement in sea level (SL, 760 Torr) VO2max during hypobaric hypoxia (HH) and variables that could alter or be related to the decrement in VO2max. HH conditions consisted of 682 Torr, 632 Torr, and 566 Torr, and the measured independent variables were SL-VO2max, SL lactate threshold (SL-LT), the change in hemoglobin saturation at VO2max between 760 and 566 Torr (delta SaO2max), lean body mass (LBM), and gender. Male (N = 14) and female (N = 14) subjects of varied fitness, training status, and residential altitude (1,640-2,460 m) completed cycle ergometry tests of VO2max at each HH condition under randomized and single-blinded conditions. VO2max decreased significantly from 760 Torr after 682 Torr (approximately 915 m) (3.5 +/- 0.9 to 3.4 +/- 0.8 L.min-1, P = 0.0003). Across all HH conditions, the slope of the relative decrement in VO2max (%VO2max) during HH was -9.2%/100 mm Hg (-8.1%/1000 m) with an initial decrease from 100% estimated to occur below 705 Torr (610 m). Step-wise multiple regression revealed that SL-VO2max, SL-LT, delta SaO2max, LBM, and gender each significantly combined to account for 89.03% of the variance in the decrement in VO2max (760-566 Torr) (P decrement in VO2max during HH. The unique variance explanation afforded by SL-LT, LBM, and gender suggests that issues pertaining to oxygen diffusion within skeletal muscle may add to the explanation of between subjects variability in the decrement in VO2max during HH.

  1. Developpement d'une methode de Monte Carlo dependante du temps et application au reacteur de type CANDU-6

    Science.gov (United States)

    Mahjoub, Mehdi

    La resolution de l'equation de Boltzmann demeure une etape importante dans la prediction du comportement d'un reacteur nucleaire. Malheureusement, la resolution de cette equation presente toujours un defi pour une geometrie complexe (reacteur) tout comme pour une geometrie simple (cellule). Ainsi, pour predire le comportement d'un reacteur nucleaire,un schema de calcul a deux etapes est necessaire. La premiere etape consiste a obtenir les parametres nucleaires d'une cellule du reacteur apres une etape d'homogeneisation et condensation. La deuxieme etape consiste en un calcul de diffusion pour tout le reacteur en utilisant les resultats de la premiere etape tout en simplifiant la geometrie du reacteur a un ensemble de cellules homogenes le tout entoure de reflecteur. Lors des transitoires (accident), ces deux etapes sont insuffisantes pour pouvoir predire le comportement du reacteur. Comme la resolution de l'equation de Boltzmann dans sa forme dependante du temps presente toujours un defi de taille pour tous types de geometries,un autre schema de calcul est necessaire. Afin de contourner cette difficulte, l'hypothese adiabatique est utilisee. Elle se concretise en un schema de calcul a quatre etapes. La premiere et deuxieme etapes demeurent les memes pour des conditions nominales du reacteur. La troisieme etape se resume a obtenir les nouvelles proprietes nucleaires de la cellule a la suite de la perturbation pour les utiliser, au niveau de la quatrieme etape, dans un nouveau calcul de reacteur et obtenir l'effet de la perturbation sur le reacteur. Ce projet vise a verifier cette hypothese. Ainsi, un nouveau schema de calcul a ete defini. La premiere etape de ce projet a ete de creer un nouveau logiciel capable de resoudre l'equation de Boltzmann dependante du temps par la methode stochastique Monte Carlo dans le but d'obtenir des sections efficaces qui evoluent dans le temps. Ce code a ete utilise pour simuler un accident LOCA dans un reacteur nucleaire de type

  2. Wind turbines and human health.

    Science.gov (United States)

    Knopper, Loren D; Ollson, Christopher A; McCallum, Lindsay C; Whitfield Aslund, Melissa L; Berger, Robert G; Souweine, Kathleen; McDaniel, Mary

    2014-01-01

    The association between wind turbines and health effects is highly debated. Some argue that reported health effects are related to wind turbine operation [electromagnetic fields (EMF), shadow flicker, audible noise, low-frequency noise, infrasound]. Others suggest that when turbines are sited correctly, effects are more likely attributable to a number of subjective variables that result in an annoyed/stressed state. In this review, we provide a bibliographic-like summary and analysis of the science around this issue specifically in terms of noise (including audible, low-frequency noise, and infrasound), EMF, and shadow flicker. Now there are roughly 60 scientific peer-reviewed articles on this issue. The available scientific evidence suggests that EMF, shadow flicker, low-frequency noise, and infrasound from wind turbines are not likely to affect human health; some studies have found that audible noise from wind turbines can be annoying to some. Annoyance may be associated with some self-reported health effects (e.g., sleep disturbance) especially at sound pressure levels >40 dB(A). Because environmental noise above certain levels is a recognized factor in a number of health issues, siting restrictions have been implemented in many jurisdictions to limit noise exposure. These setbacks should help alleviate annoyance from noise. Subjective variables (attitudes and expectations) are also linked to annoyance and have the potential to facilitate other health complaints via the nocebo effect. Therefore, it is possible that a segment of the population may remain annoyed (or report other health impacts) even when noise limits are enforced. Based on the findings and scientific merit of the available studies, the weight of evidence suggests that when sited properly, wind turbines are not related to adverse health. Stemming from this review, we provide a number of recommended best practices for wind turbine development in the context of human health.

  3. Wind turbines and human health

    Directory of Open Access Journals (Sweden)

    Loren eKnopper

    2014-06-01

    Full Text Available The association between wind turbines and health effects is highly debated. Some argue that reported health effects are related to wind turbine operation (electromagnetic fields (EMF, shadow flicker, audible noise, low frequency noise, infrasound. Others suggest that when turbines are sited correctly, effects are more likely attributable to a number of subjective variables that result in an annoyed/stressed state. In this review we provide a bibliographic-like summary and analysis of the science around this issue specifically in terms of noise (including audible, low frequency noise and infrasound, EMF and shadow flicker. Now there are roughly 60 scientific peer-reviewed articles on this issue. The available scientific evidence suggests that EMF, shadow flicker, low frequency noise and infrasound from wind turbines are not likely to affect human health; some studies have found that audible noise from wind turbines can be annoying to some. Annoyance may be associated with some self-reported health effects (e.g., sleep disturbance especially at sound pressure levels >40 dB(A. Because environmental noise above certain levels is a recognized factor in a number of health issues, siting restrictions have been implemented in many jurisdictions to limit noise exposure. These setbacks should help alleviate annoyance from noise. Subjective variables (attitudes and expectations are also linked to annoyance and have the potential to facilitate other health complaints via the nocebo effect. Therefore, it is possible that a segment of the population may remain annoyed (or report other health impacts even when noise limits are enforced. Based on the findings and scientific merit of the available studies, the weight of evidence suggests that when sited properly, wind turbines are not related to adverse health. Stemming from this review, we provide a number of recommended best practices for wind turbine development in the context of human health.

  4. Wind Turbines and Human Health

    Science.gov (United States)

    Knopper, Loren D.; Ollson, Christopher A.; McCallum, Lindsay C.; Whitfield Aslund, Melissa L.; Berger, Robert G.; Souweine, Kathleen; McDaniel, Mary

    2014-01-01

    The association between wind turbines and health effects is highly debated. Some argue that reported health effects are related to wind turbine operation [electromagnetic fields (EMF), shadow flicker, audible noise, low-frequency noise, infrasound]. Others suggest that when turbines are sited correctly, effects are more likely attributable to a number of subjective variables that result in an annoyed/stressed state. In this review, we provide a bibliographic-like summary and analysis of the science around this issue specifically in terms of noise (including audible, low-frequency noise, and infrasound), EMF, and shadow flicker. Now there are roughly 60 scientific peer-reviewed articles on this issue. The available scientific evidence suggests that EMF, shadow flicker, low-frequency noise, and infrasound from wind turbines are not likely to affect human health; some studies have found that audible noise from wind turbines can be annoying to some. Annoyance may be associated with some self-reported health effects (e.g., sleep disturbance) especially at sound pressure levels >40 dB(A). Because environmental noise above certain levels is a recognized factor in a number of health issues, siting restrictions have been implemented in many jurisdictions to limit noise exposure. These setbacks should help alleviate annoyance from noise. Subjective variables (attitudes and expectations) are also linked to annoyance and have the potential to facilitate other health complaints via the nocebo effect. Therefore, it is possible that a segment of the population may remain annoyed (or report other health impacts) even when noise limits are enforced. Based on the findings and scientific merit of the available studies, the weight of evidence suggests that when sited properly, wind turbines are not related to adverse health. Stemming from this review, we provide a number of recommended best practices for wind turbine development in the context of human health. PMID:24995266

  5. High temperature turbine engine structure

    Energy Technology Data Exchange (ETDEWEB)

    Carruthers, W.D.; Boyd, G.L.

    1993-07-20

    A hybrid ceramic/metallic gas turbine is described comprising; a housing defining an inlet, an outlet, and a flow path communicating the inlet with the outlet for conveying a flow of fluid through the housing, a rotor member journaled by the housing in the flow path, the rotor member including a compressor rotor portion rotatively inducting ambient air via the inlet and delivering this air pressurized to the flow path downstream of the compressor rotor, a combustor disposed in the flow path downstream of the compressor receiving the pressurized air along with a supply of fuel to maintain combustion providing a flow of high temperature pressurized combustion products in the flow path downstream thereof, the rotor member including a turbine rotor portion disposed in the flow path downstream of the combustor and rotatively expanding the combustion products toward ambient for flow from the turbine engine via the outlet, the turbine rotor portion providing shaft power driving the compressor rotor portion and an output shaft portion of the rotor member, a disk-like metallic housing portion journaling the rotor member to define a rotational axis therefore, and a disk-like annular ceramic turbine shroud member bounding the flow path downstream of the combustor and circumscribing the turbine rotor portion to define a running clearance therewith, the disk-like ceramic turbine shroud member having a reference axis coaxial with the rotational axis and being spaced axially from the metallic housing portion in mutually parallel concentric relation therewith and a plurality of spacers disposed between ceramic disk-like shroud member and the metallic disk-like housing portion and circumferentially spaced apart, each of the spacers having a first and second end portion having an end surface adjacent the shroud member and the housing portion respectively, the end surfaces having a cylindrical curvature extending transversely relative to the shroud member and the housing portion.

  6. Optimal design of marine steam turbine

    International Nuclear Information System (INIS)

    Liu Chengyang; Yan Changqi; Wang Jianjun

    2012-01-01

    The marine steam turbine is one of the key equipment in marine power plant, and it tends to using high power steam turbine, which makes the steam turbine to be heavier and larger, it causes difficulties to the design and arrangement of the steam turbine, and the marine maneuverability is seriously influenced. Therefore, it is necessary to apply optimization techniques to the design of the steam turbine in order to achieve the minimum weight or volume by means of finding the optimum combination of design parameters. The math model of the marine steam turbine design calculation was established. The sensitivities of condenser pressure, power ratio of HP turbine with LP turbine, and the ratio of diameter with height at the end stage of LP turbine, which influence the weight of the marine steam turbine, were analyzed. The optimal design of the marine steam turbine, aiming at the weight minimization while satisfying the structure and performance constraints, was carried out with the hybrid particle swarm optimization algorithm. The results show that, steam turbine weight is reduced by 3.13% with the optimization scheme. Finally, the optimization results were analyzed, and the steam turbine optimization design direction was indicated. (authors)

  7. Wind tunnel study of helical and straight-bladed vertical-axis wind turbine wakes

    Science.gov (United States)

    Bagheri, Maryam; Araya, Daniel

    2017-11-01

    It is hypothesized that blade curvature can serve as a passive means to control fluid entrainment and wake recovery in vertical-axis wind turbine (VAWT) arrays. We test this experimentally in a wind tunnel using two different VAWT configurations, one with straight blades and another with helical blades, keeping all other experimental parameters fixed. A small-scale, commercially available VAWT (15W max power) is used as the baseline wind tunnel model in each case. The commercial VAWT blades are replaced with either straight or helical blades that are 3D-printed extrusions of the same airfoil cross-section. Results from smoke flow visualization, three-component wake velocity measurements, and turbine power data are presented. These results give insight into the potential use of VAWTs with curved blades in utility-scale wind farms.

  8. Composite Thickness Optimization of Offshore Wind Turbine Blade with Fixed outer Geometry

    DEFF Research Database (Denmark)

    Sjølund, Jonas Heidemann; Lund, Erik

    2017-01-01

    With the objective of mass minimization, a 73-m offshore wind turbine blade is optimized using a gradient based approach on a Finite Element (FE) model. Constant loads and a fixed outer geometry are assumed. Plies of the same material and same orientation are grouped together in plygroups. The th....... The thicknesses of the plygroups are chosen as design variables. Manufacturing constraints such as ply-drops are taken into account using linear constraints. Structural constraints include buckling, tip displacement and max. strain failure indices....

  9. Hybrid Turbine Electric Vehicle

    Science.gov (United States)

    Viterna, Larry A.

    1997-01-01

    Hybrid electric power trains may revolutionize today's ground passenger vehicles by significantly improving fuel economy and decreasing emissions. The NASA Lewis Research Center is working with industry, universities, and Government to develop and demonstrate a hybrid electric vehicle. Our partners include Bowling Green State University, the Cleveland Regional Transit Authority, Lincoln Electric Motor Division, the State of Ohio's Department of Development, and Teledyne Ryan Aeronautical. The vehicle will be a heavy class urban transit bus offering double the fuel economy of today's buses and emissions that are reduced to 1/10th of the Environmental Protection Agency's standards. At the heart of the vehicle's drive train is a natural-gas-fueled engine. Initially, a small automotive engine will be tested as a baseline. This will be followed by the introduction of an advanced gas turbine developed from an aircraft jet engine. The engine turns a high-speed generator, producing electricity. Power from both the generator and an onboard energy storage system is then provided to a variable-speed electric motor attached to the rear drive axle. An intelligent power-control system determines the most efficient operation of the engine and energy storage system.

  10. Aircraft gas turbines

    Energy Technology Data Exchange (ETDEWEB)

    Sekido, T [Ishikawajima-Harima Heavy Industries, Co. Ltd., Tokyo (Japan)

    1994-03-01

    Current developmental activities of aircraft gas turbines in Japan are reviewed. V2500-A5 engine with thrust of 30,000 LBF is scheduled to be used for real aircraft in 1994, and intensive developmental activities are also proceeding in larger engines over 90,000 LBF. Recently, developmental programs of engines for 75-100 seat aircraft have been actively discussed, and Japanese engine makers are having discussions towards international collaboration. Such engines will be high bypass turbofans of 12,000-22,000 LBF. Development of SST/HST engines in a speed range from subsonic to Mach 5 is under the initiative of the Agency of Industrial Science and Technology. The Technical Research and Development Institute of Japan, Defence Agency achieved the target thrust of 3.4 tons in the small turbofan engine program, and the small turboshaft engine for small helicopters is also under development. Both National Aerospace Laboratory (NAL) and Institute of Space and Aeronautical Science (ISAS) are now conducting the research programs on turbo-ramjet engines under a component test phase. 1 fig.

  11. Turbines in the ocean

    Science.gov (United States)

    Smith, F. G. W.; Charlier, R. H.

    1981-10-01

    It is noted that the relatively high-speed ocean currents flowing northward along the east coast of the U.S. may be able to supply a significant proportion of the future electric power requirements of urban areas. The Gulf Stream core lies only about 20 miles east of Miami; here its near-surface water reaches velocities of 4.3 miles per hour. Attention is called to the estimate that the energy available in the current of the Gulf Stream adjacent to Florida is approximately equivalent to that generated by 25 1,000-megawatt power plants. It is also contended that this power could be produced at competitive prices during the 1980s using large turbines moored below the ocean surface near the center of the Stream. Assuming an average ocean-current speed between 4 and 5 knots at the current core, the power density of a hydroturbine could reach 410 watts per square foot, about 100 times that of a wind-driven device of similar scale operating in an airflow of approximately 11 knots.

  12. Wind turbine airfoil catalogue

    Energy Technology Data Exchange (ETDEWEB)

    Bertagnolio, F.; Soerensen, N.; Johansen, J.; Fuglsang, P.

    2001-08-01

    The aim of this work is two-sided. Firstly, experimental results obtained for numerous sets of airfoil measurements (mainly intended for wind turbine applications) are collected and compared with computational results from the 2D Navier-Stokes solver EllipSys2D, as well as results from the panel method code XFOIL. Secondly, we are interested in validating the code EllipSys2D and finding out for which air-foils it does not perform well compared to the experiments, as well as why, when it does so. The airfoils are classified according to the agreement between the numerical results and experimental data. A study correlating the available data and this classification is performed. It is found that transition modelling is to a large extent responsible for the poor quality of the computational results for most of the considered airfoils. The transition model mechanism that leads to these discrepancies is identified. Some advices are given for elaborating future airfoil design processes that would involve the numerical code EllipSys2D in particular, and transition modelling in general. (au)

  13. Répartition de la température dans l'enceinte d'un réfrigérateur ...

    African Journals Online (AJOL)

    ... de la température d'une charge tout au long de sa conservation dans les conditions extrêmes définies par l'Organisation Mondiale de la Santé de température extérieure moyenne de 43°C. Pour ce faire, nous avons développé en laboratoire un modèle numérique basé sur les équations de Navier-Stokes, qui a été par la ...

  14. On the Potential of MAX phases for Nuclear Applications

    Science.gov (United States)

    Tallman, Darin Joseph

    Materials within nuclear reactors experience some of the harshest environments currently known to man, including long term operation in extreme temperatures, corrosive media, and fast neutron fluences with up to 100 displacements per atom, dpa. In order to improve the efficiency and safety of current and future reactors, new materials are required to meet these harsh demands. The M n+1AXn phases, a growing family of ternary nano-layered ceramics, possess a desirable combination of metallic and ceramic properties. They are composed of an early transition metal (M), a group 13--16 element (A), and carbon and/or nitrogen (X). The MAX phases are being proposed for use in such extreme environments because of their unique combination of high fracture toughness values and thermal conductivities, machinability, oxidation resistance, and ion irradiation damage tolerance. Previous ion irradiation studies have shown that Ti3SiC2 and Ti3AlC2 resist irradiation damage, maintaining crystallinity up to 50 dpa. The aim of this work was to explore the effect of neutron irradiation, up to 9 dpa and at temperatures of 100 to 1000 °C, on select MAX phases for the first time. The MAX phases Ti3SiC2, Ti 3AlC2, Ti2AlC, and Ti2AlN were synthesized, and irradiated in test reactors that simulate in-pile conditions of nuclear reactors. X-ray diffraction, XRD, pattern refinements of samples revealed a distortion of the crystal lattice after low temperature irradiation, which was not observed after high temperature irradiations. Additionally, the XRD results indicated that Ti3AlC2 and Ti2AlN dissociated after relatively low neutron doses. This led us to focus on Ti 3SiC2 and Ti2AlC. For the first time, dislocation loops were observed in Ti3SiC 2 and Ti2AlC as a result of neutron irradiation. At 1 x 1023 loops/m3, the loop density in Ti2 AlC after irradiation to 0.1 dpa at 700°C was 1.5 orders of magnitude greater than that observed in Ti3SiC2, at 3 x 1021 loops/m3. The Ti2AlC composition

  15. LES investigation of infinite staggered wind-turbine arrays

    International Nuclear Information System (INIS)

    Yang, Xiaolei; Sotiropoulos, Fotis

    2014-01-01

    The layouts of turbines affect the turbine wake interactions and thus the wind farm performance. The wake interactions in infinite staggered wind-turbine arrays are investigated and compared with infinite aligned turbine arrays in this paper. From the numerical results we identify three types of wake behaviours, which are significantly different from wakes in aligned wind-turbine arrays. For the first type, each turbine wake interferes with the pair of staggered downstream turbine wakes and the aligned downstream turbine. For the second type, each turbine wake interacts with the first two downstream turbine wakes but does not show significant interference with the second aligned downstream turbine. For the third type, each turbine wake recovers immediately after passing through the gap of the first two downstream turbines and has little interaction with the second downstream turbine wakes The extracted power density and power efficiency are also studied and compared with aligned wind-turbine arrays

  16. Turbine and its turbine control system of full scope simulator for Qinshan 300 MW Nuclear Power Unit

    International Nuclear Information System (INIS)

    Zhang Dongwei; Zhu Jinping

    1996-01-01

    The simulation for Qinshan 300 MW Nuclear Power Unit turbine and turbine control system is briefly introduced. The simulation system includes lube oil system, jacking oil pump system, turning gear system, turbine supervisor system and turbine control system. It not only correctly simulates the process of turbine normal start up, operation, and shut down, but also the response of turbine under the malfunction conditions

  17. Probabilistic Meteorological Characterization for Turbine Loads

    DEFF Research Database (Denmark)

    Kelly, Mark C.; Larsen, Gunner Chr.; Dimitrov, Nikolay Krasimirov

    2014-01-01

    Beyond the existing, limited IEC prescription to describe fatigue loads on wind turbines, we look towards probabilistic characterization of the loads via analogous characterization of the atmospheric flow, particularly for today's "taller" turbines with rotors well above the atmospheric surface...

  18. Advanced Turbine Blade Cooling Techniques, Phase I

    Data.gov (United States)

    National Aeronautics and Space Administration — Gas turbine engine technology is constantly challenged to operate at higher combustor outlet temperatures. In a modern gas turbine engine, these temperatures can...

  19. Simulating Collisions for Hydrokinetic Turbines

    Energy Technology Data Exchange (ETDEWEB)

    Richmond, Marshall C.; Romero Gomez, Pedro DJ; Rakowski, Cynthia L.

    2013-10-01

    Evaluations of blade-strike on an axial-flow Marine Hydrokinetic turbine were conducted using a conventional methodology as well as an alternative modeling approach proposed in the present document. The proposed methodology integrates the following components into a Computa- tional Fluid Dynamics (CFD) model: (i) advanced eddy-resolving flow simulations, (ii) ambient turbulence based on field data, (iii) moving turbine blades in highly transient flows, and (iv) Lagrangian particles to mimic the potential fish pathways. The sensitivity of blade-strike prob- ability to the following conditions was also evaluated: (i) to the turbulent environment, (ii) to fish size and (iii) to mean stream flow velocity. The proposed methodology provided fraction of collisions and offered the capability of analyzing the causal relationships between the flow envi- ronment and resulting strikes on rotating blades. Overall, the conventional methodology largely overestimates the probability of strike, and lacks the ability to produce potential fish and aquatic biota trajectories as they interact with the rotating turbine. By using a set of experimental corre- lations of exposure-response of living fish colliding on moving blades, the occurrence, frequency and intensity of the particle collisions was next used to calculate the survival rate of fish crossing the MHK turbine. This step indicated survival rates always greater than 98%. Although the proposed CFD framework is computationally more expensive, it provides the advantage of evaluating multiple mechanisms of stress and injury of hydrokinetic turbine devices on fish.

  20. A reference Pelton turbine design

    International Nuclear Information System (INIS)

    Solemslie, B W; Dahlhaug, O G

    2012-01-01

    The designs of hydraulic turbines are usually close kept corporation secrets. Therefore, the possibility of innovation and co-operation between different academic institutions regarding a specific turbine geometry is difficult. A Ph.D.-project at the Waterpower Laboratory, NTNU, aim to design several model Pelton turbines where all measurements, simulations, the design strategy, design software in addition to the physical model will be available to the public. In the following paper a short description of the methods and the test rig that are to be utilized in the project are described. The design will be based on empirical data and NURBS will be used as the descriptive method for the turbine geometry. In addition CFX and SPH simulations will be included in the design process. Each turbine designed and produced in connection to this project will be based on the experience and knowledge gained from the previous designs. The first design will be based on the philosophy to keep a near constant relative velocity through the bucket.

  1. A reference Pelton turbine design

    Science.gov (United States)

    Solemslie, B. W.; Dahlhaug, O. G.

    2012-09-01

    The designs of hydraulic turbines are usually close kept corporation secrets. Therefore, the possibility of innovation and co-operation between different academic institutions regarding a specific turbine geometry is difficult. A Ph.D.-project at the Waterpower Laboratory, NTNU, aim to design several model Pelton turbines where all measurements, simulations, the design strategy, design software in addition to the physical model will be available to the public. In the following paper a short description of the methods and the test rig that are to be utilized in the project are described. The design will be based on empirical data and NURBS will be used as the descriptive method for the turbine geometry. In addition CFX and SPH simulations will be included in the design process. Each turbine designed and produced in connection to this project will be based on the experience and knowledge gained from the previous designs. The first design will be based on the philosophy to keep a near constant relative velocity through the bucket.

  2. Materials for Wind Turbine Blades: An Overview

    DEFF Research Database (Denmark)

    Mishnaevsky, Leon; Branner, Kim; Petersen, Helga Nørgaard

    2017-01-01

    A short overview of composite materials for wind turbine applications is presented here. Requirements toward the wind turbine materials, loads, as well as available materials are reviewed. Apart from the traditional composites for wind turbine blades (glass fibers/epoxy matrix composites), natural...... composites, hybrid and nanoengineered composites are discussed. Manufacturing technologies for wind turbine composites, as well their testing and modelling approaches are reviewed....

  3. Simulation model of nuclear power plant turbine

    International Nuclear Information System (INIS)

    Dutta, Anu; Thangamani, I.; Chakraborty, G.; Ghosh, A.K.

    2006-04-01

    A computer code TURDYN has been developed for prediction of HP and LP turbine torque under thermodynamic transient conditions. The model is based on the conservation laws of mass and energy. All the important components of turbine systems e.g. high pressure turbine, low pressure turbine, feed heaters, reheater, moisture separator have been considered. The details of the mathematical formulation of the model and open loop responses for specific disturbances are presented. (author)

  4. Materials for Wind Turbine Blades: An Overview.

    Science.gov (United States)

    Mishnaevsky, Leon; Branner, Kim; Petersen, Helga Nørgaard; Beauson, Justine; McGugan, Malcolm; Sørensen, Bent F

    2017-11-09

    A short overview of composite materials for wind turbine applications is presented here. Requirements toward the wind turbine materials, loads, as well as available materials are reviewed. Apart from the traditional composites for wind turbine blades (glass fibers/epoxy matrix composites), natural composites, hybrid and nanoengineered composites are discussed. Manufacturing technologies for wind turbine composites, as well their testing and modelling approaches are reviewed.

  5. Repair of steam turbines by welding

    International Nuclear Information System (INIS)

    Bohnstedt, H.J.; Loebert, P.

    1987-01-01

    In some cases, turbine parts can be repaired by welding, even rotating parts such as the shaft or the blades. Practical examples of successful repair work are explained, as for instance: welding of the last web of the turbine wheel of two MD-rotors, repair of erosion damage on turbine blades, of solid-matter erosion on a medium-pressure blading, or welding repair of a high-pressure turbine casing. (DG) [de

  6. Smart Wind Turbine: Analysis and Autonomous Flap

    OpenAIRE

    Bernhammer, L.O.

    2015-01-01

    Wind turbines convert kinetic energy of the wind into electrical energy. Unfortunately, this process is everything but constant, as the wind source shows large fluctuations with high and low frequencies. This turbulence, together with the wind shear and yawed inflow, excites the turbine structure, thereby driving the loads and the design of turbines in general and blades in particular. In response to this, several control mechanisms have been applied to wind turbines since the generation of s...

  7. Min-max optimal public service system design

    Directory of Open Access Journals (Sweden)

    Marek Kvet

    2015-03-01

    Full Text Available This paper deals with designing a fair public service system. To achieve fairness, various schemes are be applied. The strongest criterion in the process is minimization of disutility of the worst situated users and then optimization of disutility of the better situated users under the condition that disutility of the worst situated users does not worsen, otherwise called lexicographical minimization. Focusing on the first step, this paper endeavours to find an effective solution to the weighted p-median problem based on radial formulation. Attempts at solving real instances when using a location-allocation model often fail due to enormous computational time or huge memory demands. Radial formulation can be implemented using commercial optimisation software. The main goal of this study is to show that the suitability solving of the min-max optimal public service system design can save computational time.

  8. Taking Your iPod touch to the Max

    CERN Document Server

    Sadun, Erica

    2010-01-01

    Unleash your iPhone and take it to the limit using secret tips and techniques from gadget hacker Erica Sadun. Fast and fun to read, Taking Your iPod touch 4 to the Max is fully updated to show you how get the most out of Apple's new OS 4. You'll find all the best undocumented tricks as well as the most efficient and enjoyable introduction to the iPhone available. Starting with an introduction to iPod touch 4 basics, you'll quickly move on to discover the iPod touch's hidden potential, like how to connect to a TV, get contract-free VOIP, and hack OS 4 so it will run apps on your iPod touch. Fro

  9. Stress-enhanced lithiation in MAX compounds for battery applications

    KAUST Repository

    Zhu, Jiajie

    2017-07-31

    Li-ion batteries are well-established energy storage systems. Upon lithiation conventional group IVA compound anodes undergo large volume expansion and thus suffer from stress-induced performance degradation. Instead of the emerging MXene anodes fabricated by an expensive and difficult-to-control etching technique, we study the feasibility of utilizing the parent MAX compounds. We reveal that M2AC (M=Ti, V and A=Si, S) compounds repel lithiation at ambient conditions, while structural stress turns out to support lithiation, in contrast to group IVA compounds. For V2SC the Li diffusion barrier is found to be lower than reported for group IVA compound anodes, reflecting potential to achieve fast charge/discharge.

  10. Elevated carbon dioxide increases salicylic acid in Glycine max.

    Science.gov (United States)

    Casteel, Clare L; Segal, Lauren M; Niziolek, Olivia K; Berenbaum, May R; DeLucia, Evan H

    2012-12-01

    Concentrations of carbon dioxide (CO(2)) are increasing in the atmosphere, affecting soybean (Glycine max L.) phytohormone signaling and herbivore resistance. Whether the impact of elevated CO(2) on phytohormones and induced defenses is a generalized response within this species is an open question. We examined jasmonic acid (JA) and salicylic acid (SA) under ambient and elevated CO(2) concentrations with and without Japanese beetle (Popillia japonica Newman) damage and artificial damage across six soybean cultivars (HS93-4118, Pana, IA 3010, Loda, LN97-15076, and Dwight). Elevated CO(2) reduced constitutive levels of JA and related transcripts in some but not all soybean cultivars. In contrast to the variation in JA, constitutive levels of salicylic were increased universally among soybean cultivars grown under elevated CO(2). Variation in hormonal signaling may underpin observed variation in the response of insect herbivores and pathogens to plants grown under elevated CO(2).

  11. BUROCRACIA E CRISE DE LEGITIMIDADE: A PROFECIA DE MAX WEBER

    OpenAIRE

    Branco, Pedro H. Villas Bôas Castelo

    2016-01-01

    Resumo A sociologia da dominação e a do direito de Max Weber representam uma mudança de paradigma no campo da teoria política. Ao deslocarem o eixo de análise dos meios de aquisição e instituição do poder dos dominadores para a crença dos dominados, operam uma notável inversão no modo de compreensão da legitimidade do poder político. A exposição da tensão entre a expansão burocrática e a estrutura da dominação democrática conferiram à reflexão weberiana um tom profético, cuja repercussão se f...

  12. [Max Weber's illness--sociologic aspects of the depressive structure].

    Science.gov (United States)

    Frommer, J; Frommer, S

    1993-05-01

    Between 1897 and 1902 the economist and sociologist Max Weber from Heidelberg suffered from a severe depressive crisis with multiple recurrences of its symptomatology in the following years. The biographic background of the disease process is examined. Questions regarding the specific diagnosis are discussed. Furthermore, his work shows that Weber was indirectly deeply concerned with the cultural, historical and social background conditions of depressive experience and behavior in the context of his study on Protestantic Ethics and the Spirit of Capitalism. Weber's definition of modern society as an iron cage, determined by Occidental Rationalism, shows that this cultural background demands a great amount of role conformity from the individual. Weber's theoretical approach should spark interest in the current psychopathological discussion of the characteristic structural features of a depressed personality.

  13. Stress-enhanced lithiation in MAX compounds for battery applications

    KAUST Repository

    Zhu, Jiajie; Chroneos, Alexander; Wang, Lei; Rao, Feng; Schwingenschlö gl, Udo

    2017-01-01

    Li-ion batteries are well-established energy storage systems. Upon lithiation conventional group IVA compound anodes undergo large volume expansion and thus suffer from stress-induced performance degradation. Instead of the emerging MXene anodes fabricated by an expensive and difficult-to-control etching technique, we study the feasibility of utilizing the parent MAX compounds. We reveal that M2AC (M=Ti, V and A=Si, S) compounds repel lithiation at ambient conditions, while structural stress turns out to support lithiation, in contrast to group IVA compounds. For V2SC the Li diffusion barrier is found to be lower than reported for group IVA compound anodes, reflecting potential to achieve fast charge/discharge.

  14. Historical Paths and Intellectual Projects: The Case of Max Weber

    Directory of Open Access Journals (Sweden)

    Sven Eliaeson

    2017-06-01

    Full Text Available Max Weber is an elusive classic, and competing traditions claim his legacy. As in other cases, the interpretation of this classic should take into account formative experiences, historical context and links to older traditions. Weber theorized rational modernity, albeit with a certain ambiguity (the “iron cage”. He reworked the legacy of German historicism, but took it in the direction of methodological individualism; at the same time, and through the very affiliation to historicism, he contributed to German nation-building. His emphasis on the state as a necessary unit of analysis now seems obsolete, and so does his inclination to take the imperialistic dominance of the European great powers for granted. He was not immune to the ideology that opposed Germany’s cultural calling to Western civilization and Russian barbarism.

  15. The Max Launch Abort System - Concept, Flight Test, and Evolution

    Science.gov (United States)

    Gilbert, Michael G.

    2014-01-01

    The NASA Engineering and Safety Center (NESC) is an independent engineering analysis and test organization providing support across the range of NASA programs. In 2007 NASA was developing the launch escape system for the Orion spacecraft that was evolved from the traditional tower-configuration escape systems used for the historic Mercury and Apollo spacecraft. The NESC was tasked, as a programmatic risk-reduction effort to develop and flight test an alternative to the Orion baseline escape system concept. This project became known as the Max Launch Abort System (MLAS), named in honor of Maxime Faget, the developer of the original Mercury escape system. Over the course of approximately two years the NESC performed conceptual and tradeoff analyses, designed and built full-scale flight test hardware, and conducted a flight test demonstration in July 2009. Since the flight test, the NESC has continued to further develop and refine the MLAS concept.

  16. NASA/Max Planck Institute Barium Ion Cloud Project.

    Science.gov (United States)

    Brence, W. A.; Carr, R. E.; Gerlach, J. C.; Neuss, H.

    1973-01-01

    NASA and the Max Planck Institute for Extraterrestrial Physics (MPE), Munich, Germany, conducted a cooperative experiment involving the release and study of a barium cloud at 31,500 km altitude near the equatorial plane. The release was made near local magnetic midnight on Sept. 21, 1971. The MPE-built spacecraft contained a canister of 16 kg of Ba CuO mixture, a two-axis magnetometer, and other payload instrumentation. The objectives of the experiment were to investigate the interaction of the ionized barium cloud with the ambient medium and to deduce the properties of electric fields in the proximity of the release. An overview of the project is given to briefly summarize the organization, responsibilities, objectives, instrumentation, and operational aspects of the project.

  17. Bureaucracy and Education: an analysis since Max Weber

    Directory of Open Access Journals (Sweden)

    João Alfredo Costa de Campos Melo Júnior

    2010-06-01

    Full Text Available This paper aims at providing a discussion on bureaucracy and education based on the comprehensive sociology developed by Weber. The choice of Max Weber seems to be the most appropriate due the diversity and depth of his intellectual production, what includes the issue of bureaucracy. The use of Weber should serve as a precise instrument of conceptual analysis on the theme addressed here. Certainly, this thinker has been one of the main scholars on bureaucracy, with focus on Germany at the time of the First World War (1914-1918. It is within such a productive theoretical framework that we intend to provide a few reflections about education and bureaucracy from a Weberian epistemological base.

  18. Taking Your iPad 2 to the Max

    CERN Document Server

    Sadun, Erica; Sande, Steve

    2011-01-01

    iPad 2: It looks different. It acts different. It connects to the world, yet it is as personal as a well-worn book. And now it has two cameras!. Taking Your iPad 2 to the Max is written so that anyone can quickly get up to speed on Apple's latest hit. As bloggers at The Unofficial Apple Weblog (TUAW.com), the authors have the happy privilege of working with Apple products every day, and they'll guide you through all of the perks of being an iPad 2 owner. This book takes you from selecting and buying an iPad, to connecting it to the Internet, to using the incredible power of the iPad and all it

  19. Taking Your iPhone 4 to the Max

    CERN Document Server

    Sadun, Erica

    2010-01-01

    Unleash your iPhone and take it to the limit using powerful tips and techniques from tech consultant Steve Sande and gadget hacker Erica Sadun. Fast and fun to read, Taking Your iPhone 4 to the Max shows you how to get the most out of Apple's new iPhone 4. You'll find all the best undocumented tricks as well as the most efficient and enjoyable introduction to the iPhone available. Starting with an introduction to iPhone basics, you'll quickly move on to discover the iPhone's hidden potential, like how to connect to a TV, use Voice Control, have video chats with FaceTime, and call friends overs

  20. Taking Your iPhoto '11 to the Max

    CERN Document Server

    Grothaus, Michael

    2011-01-01

    Taking Your iPhoto '11 to the Max walks users through Apple's most popular software application in the iLife suite - iPhoto. This book helps readers use iPhoto to its fullest to organize and create digital memories and keepsakes. * Learn all about Apple's newest version of iPhoto - iPhoto '11 * Explore iPhoto, one menu button at a time * Walk-through tutorials guide you step-by-step What you'll learn * How to import existing photo libraries from popular Windows applications * How to organize and edit your photos * How to tag your photos using iPhoto's Faces and Places features * How to create

  1. Pump Application as Hydraulic Turbine – Pump as Turbine (PaT)

    OpenAIRE

    Rusovs, D

    2009-01-01

    The paper considers pump operation as hydraulic turbine with purpose to produce mechanical power from liquid flow. The Francis hydraulic turbine was selected for comparison with centrifugal pump in reverse operation. Turbine and centrifugal pump velocity triangles were considered with purpose to evaluate PaT efficiency. Shape of impeller blades for turbine and pumps was analysed. Specific speed calculation is carried out with purpose to obtain similarity in pump and turbine description. For ...

  2. New features of the MAX IV thermionic pre-injector

    Energy Technology Data Exchange (ETDEWEB)

    Andersson, J., E-mail: joel.andersson@maxiv.lu.se; Olsson, D., E-mail: david.olsson@maxiv.lu.se; Curbis, F.; Malmgren, L.; Werin, S.

    2017-05-21

    The MAX IV facility in Lund, Sweden consists of two storage rings for production of synchrotron radiation. The smaller 1.5 GeV ring is presently under construction, while the larger 3 GeV ring is being commissioned. Both rings will be operating with top-up injections from a full-energy injector. During injection, the electron beam is first delivered to the main injector from a thermionic pre-injector which consists of a thermionic RF gun, a chopper system, and an energy filter. In order to reduce losses of high-energy electrons along the injector and in the rings, the electron beam provided by the thermionic pre-injector should have the correct time structure and energy distribution. In this paper, the design of the MAX IV thermionic pre-injector with all its sub components is presented. The electron beam delivered by the pre-injector and its dependence on parameters such as optics, cathode temperature, and RF power are studied. Measurements are here compared with simulation results obtained by particle tracking and electromagnetic codes. The chopper system is described in detail, and different driving schemes that optimize the injection efficiency for the two storage rings are investigated. During operation, it was discovered that the structure of the beam delivered by the gun is affected by mode beating between the accelerating and a low-order mode. This mode beating is also studied in detail. Finally, initial measurements of the electron beam delivered to the 3 GeV ring during commissioning are presented.

  3. Arpad Gerster and Max Thorek contributions to American surgery.

    Science.gov (United States)

    Langer, Robert M

    2009-01-01

    The legacy and the influence on American surgery is discussed of two Hungarian born surgeons: Arpad Gerster (1848-1923) and Max Thorek (1880-1960). Both of them were born in Northern Hungary, then part of the Austro-Hungarian Monarchy, today Slovakia. Gerster got his medical education in Vienna The influence of Theodor Billroth left everlasting impressions in him. In 1874 he arrived in New York and became the first doctor in town who practiced exclusively surgery. He became an attending surgeon in The German Hospital and later at Mount Sinai Hospital. Gerster modernized the hospital's functions and services, introducing the rotation system, and also made the original observation that dissemination of cancer may be caused by surgery. His aseptic methods were revolutionary at the time. Max Thorek arrived in Chicago in 1897. With a fantastic endurance he overwhelmed all barriers and became a doctor. He started his practice in one of Chicago's poor immigrant neighborhoods, but stepwise he could excel and in 1911 he co-founded The American Hospital. His ideas of modernizing surgery became reality. Thorek is one of the first who practiced plastic surgery, and his contribution by writing about surgical errors and safeguards became a great success. He founded the International College of Surgeons, a result of his widespread relations among surgeons all over the world. The parallels in the lives of these great surgeons: solid education, knowledge of languages, talent for music, literature, and arts, creative thinking combined with hard work, good humor, as well as a social conscience led them to make groundbreaking contributions to American and international surgery.

  4. ADVANCED TURBINE SYSTEMS PROGRAM

    Energy Technology Data Exchange (ETDEWEB)

    Sy Ali

    2002-03-01

    The market for power generation equipment is undergoing a tremendous transformation. The traditional electric utility industry is restructuring, promising new opportunities and challenges for all facilities to meet their demands for electric and thermal energy. Now more than ever, facilities have a host of options to choose from, including new distributed generation (DG) technologies that are entering the market as well as existing DG options that are improving in cost and performance. The market is beginning to recognize that some of these users have needs beyond traditional grid-based power. Together, these changes are motivating commercial and industrial facilities to re-evaluate their current mix of energy services. One of the emerging generating options is a new breed of advanced fuel cells. While there are a variety of fuel cell technologies being developed, the solid oxide fuel cells (SOFC) and molten carbonate fuel cells (MCFC) are especially promising, with their electric efficiency expected around 50-60 percent and their ability to generate either hot water or high quality steam. In addition, they both have the attractive characteristics of all fuel cells--relatively small siting footprint, rapid response to changing loads, very low emissions, quiet operation, and an inherently modular design lending itself to capacity expansion at predictable unit cost with reasonably short lead times. The objectives of this project are to:(1) Estimate the market potential for high efficiency fuel cell hybrids in the U.S.;(2) Segment market size by commercial, industrial, and other key markets;(3) Identify and evaluate potential early adopters; and(4) Develop results that will help prioritize and target future R&D investments. The study focuses on high efficiency MCFC- and SOFC-based hybrids and competing systems such as gas turbines, reciprocating engines, fuel cells and traditional grid service. Specific regions in the country have been identified where these

  5. A Two-Bladed Concept Wind Turbine

    DEFF Research Database (Denmark)

    Kim, Taeseong

    2012-01-01

    This article shows the potential for reducing extreme loads with an innovative design of wind turbine, a partial pitch two-bladed concept turbine. The most extreme conditions to test a turbine are considered to be stand-still combined with a grid failure in which the wind comes from all directions...

  6. A novel floating offshore wind turbine concept

    DEFF Research Database (Denmark)

    Vita, Luca; Schmidt Paulsen, Uwe; Friis Pedersen, Troels

    2009-01-01

    This paper will present a novel concept of a floating offshore wind turbine. The new concept is intended for vertical-axis wind turbine technology. The main purpose is to increase simplicity and to reduce total costs of an installed offshore wind farm. The concept is intended for deep water...... and large size turbines....

  7. Nonlinear Dynamics of Wind Turbine Wings

    DEFF Research Database (Denmark)

    Larsen, Jesper Winther

    , large wind turbines become increasingly flexible and dynamically sensitive. This project focuses on the structural analysis of highly flexible wind turbine wings, and the aerodynamic loading of wind turbine wings under large changes in flow field due to elastic deformations and changing wind conditions....

  8. Ducted wind turbine optimization : A numerical approach

    NARCIS (Netherlands)

    Dighe, V.V.; De Oliveira Andrade, G.L.; van Bussel, G.J.W.

    2017-01-01

    The practice of ducting wind turbines has shown a beneficial effect on the overall performance, when compared to an open turbine of the same rotor diameter1. However, an optimization study specifically for ducted wind turbines (DWT’s) is missing or incomplete. This work focuses on a numerical

  9. Wind turbine with lightning protection system

    DEFF Research Database (Denmark)

    2016-01-01

    The present invention relates to a wind turbine comprising a lightning protection system comprising a waveguide interconnecting a communication device and a signal-carrying structure. In other aspects, the present invention relates to the use of a waveguide in a lightning protection system...... of a wind turbine, a power splitter and its use in a lightning protection system of a wind turbine....

  10. Performance and safety of hydraulic turbines

    International Nuclear Information System (INIS)

    Brekke, H

    2010-01-01

    The first part of the paper contains the choice of small turbines for run of the river power plants. Then a discussion is given on the optimization of the performance of different types of large turbines. Finally a discussion on the safety and necessary maintenance of turbines is given with special attention to bolt connections.

  11. Development of Low Price Turbine Control System

    Energy Technology Data Exchange (ETDEWEB)

    Jeong, C.K.; Kim, J.A.; Jeong, W.J.; Choi, I.K.; Woo, J.H. [Korea Electric Power Research Institute, Taejon (Korea)

    2002-07-01

    This report is final research results of ''Development of Low Price Turbine Control System''. It describes test such as turbine startup, generator synchronization, rated load operation, simulation after manufacturing turbine control system. (author). 45 figs., 11 tabs.

  12. Microprocessor control of a wind turbine generator

    Science.gov (United States)

    Gnecco, A. J.; Whitehead, G. T.

    1978-01-01

    This paper describes a microprocessor based system used to control the unattended operation of a wind turbine generator. The turbine and its microcomputer system are fully described with special emphasis on the wide variety of tasks performed by the microprocessor for the safe and efficient operation of the turbine. The flexibility, cost and reliability of the microprocessor were major factors in its selection.

  13. Heat Transfer in Gas Turbines

    Science.gov (United States)

    Garg, Vijay K.

    2001-01-01

    The turbine gas path is a very complex flow field. This is due to a variety of flow and heat transfer phenomena encountered in turbine passages. This manuscript provides an overview of the current work in this field at the NASA Glenn Research Center. Also, based on the author's preference, more emphasis is on the computational work. There is much more experimental work in progress at GRC than that reported here. While much has been achieved, more needs to be done in terms of validating the predictions against experimental data. More experimental data, especially on film cooled and rough turbine blades, are required for code validation. Also, the combined film cooling and internal cooling flow computation for a real blade is yet to be performed. While most computational work to date has assumed steady state conditions, the flow is clearly unsteady due to the presence of wakes. All this points to a long road ahead. However, we are well on course.

  14. Vertical axis wind turbine airfoil

    Science.gov (United States)

    Krivcov, Vladimir; Krivospitski, Vladimir; Maksimov, Vasili; Halstead, Richard; Grahov, Jurij Vasiljevich

    2012-12-18

    A vertical axis wind turbine airfoil is described. The wind turbine airfoil can include a leading edge, a trailing edge, an upper curved surface, a lower curved surface, and a centerline running between the upper surface and the lower surface and from the leading edge to the trailing edge. The airfoil can be configured so that the distance between the centerline and the upper surface is the same as the distance between the centerline and the lower surface at all points along the length of the airfoil. A plurality of such airfoils can be included in a vertical axis wind turbine. These airfoils can be vertically disposed and can rotate about a vertical axis.

  15. Reliability Modeling of Wind Turbines

    DEFF Research Database (Denmark)

    Kostandyan, Erik

    Cost reductions for offshore wind turbines are a substantial requirement in order to make offshore wind energy more competitive compared to other energy supply methods. During the 20 – 25 years of wind turbines useful life, Operation & Maintenance costs are typically estimated to be a quarter...... for Operation & Maintenance planning. Concentrating efforts on development of such models, this research is focused on reliability modeling of Wind Turbine critical subsystems (especially the power converter system). For reliability assessment of these components, structural reliability methods are applied...... to one third of the total cost of energy. Reduction of Operation & Maintenance costs will result in significant cost savings and result in cheaper electricity production. Operation & Maintenance processes mainly involve actions related to replacements or repair. Identifying the right times when...

  16. Endoscopic inspection of steam turbines

    International Nuclear Information System (INIS)

    Maliniemi, H.; Muukka, E.

    1990-01-01

    For over ten years, Imatran Voima Oy (IVO) has developed, complementary inspection methods for steam turbine condition monitoring, which can be applied both during operation and shutdown. One important method used periodically during outages is endoscopic inspection. The inspection is based on the method where the internal parts of the turbine is inspected through access borings with endoscope and where the magnified figures of the internal parts is seen on video screen. To improve inspection assurance, an image-processing based pattern recognition method for cracks has been developed for the endoscopic inspection of turbine blades. It is based on the deduction conditions derived from the crack shape. The computer gives an alarm of a crack detection and prints a simulated image of the crack, which is then checked manually

  17. Type IV Wind Turbine Model

    DEFF Research Database (Denmark)

    Hansen, Anca Daniela; Margaris, Ioannis D.

    . In the project, this wind turbine model will be further incorporated in a wind power plant model together with the implementation in the wind power control level of the new control functionalities (inertial response, synchronising power and power system damping). For this purpose an aggregate wind power plant......This document is created as part of the EaseWind project. The goal of this project is to develop and investigate new control features for primary response provided by wind power plants. New control features as inertial response, synchronising power and power system damping are of interest to EaseWind...... project to be incorporated in the wind power plant level. This document describes the Type 4 wind turbine simulation model, implemented in the EaseWind project. The implemented wind turbine model is one of the initial necessary steps toward integrating new control services in the wind power plant level...

  18. Les possibilités des turbines de détente dans les industries gazière et pétrolière Application of Expansion Turbines in the Gas and Oil Industry

    Directory of Open Access Journals (Sweden)

    Verneau A.

    2006-11-01

    Full Text Available Utilisées depuis longtemps dans l'industrie cryogénique, les turbines de détente voient leur intérêt augmenter actuellement en tant que turbines de récupération de l'énergie des laminages. Cette énergie peut servir à l'entraînement de compresseurs, pompes ou générateurs électriques. Il existe surtout des turbines dans la gamme de 200 à 20 000 ch. Deux types principaux sont développés : les turbines axiales et les turbines radiales. Les particularités techniques et les domaines d'emploi de chaque type sont discutés. Ue intérêt particulier est porté au domaine des petites puissances (de 100 kW jusqu'à quelques centaines de watts. L'évolution du rendement en fonction de la puissance est étudiée et quelques types spéciaux bien adaptés à cette gamme, tels que les turbines périphériques, sont présentés. Quelques indications sur la récupération de l'énergie des liquides par turbines sont également données. Ensuite, plusieurs exemples d'applications sont exposés tels que : récupération de fractions condensables du gaz naturel (butane, propane, éthane, récupération de gaz perdu, récupération de l'énergie des laminages lors de la distribution et au niveau des stockages souterrains, turbine hydraulique de lavage de gaz, récupération de l'énergie des fumées de cracking catalytique, entraînement de petits générateurs électriques dans la gamme de quelques kilowatts à quelques centaines de watts. Enfin, nous abordons la technologie et les dispositions constructives particulières en nous attachant plus spécialement aux problèmes de régulation, étanchéité, paliers. Des techniques nouvelles telles que l'emploi de paliers à gaz et leurs avantages sont décrites. Les difficultés dues aux basses températures et à la condensation sont examinées. Nous terminons par quelques considérations d'ordre économique destinées à prévoir la rentabilité d'une installation de récupération d

  19. Rotary turbine for reduced flows

    Energy Technology Data Exchange (ETDEWEB)

    Florio, G.; Scornaienchi, N.M. (Calabria Univ., Arcavacata di Rende (Italy). Dipt. di Meccanica)

    1988-06-01

    The principal characteristics of the steam turbine are its simple design (and therefore low fabrication cost) and capability of handling very small rates in the order grams/s. Another important characteristic is that the deflector channel receives fluid without incidence for any value of relative velocity. This allows for a wider field of application as compared with bladed turbines. Taking into account losses due to the fact that the fluid works at relatively high velocities for long sections and to fluid leakage, efficiencies have been estimated at about 40%.

  20. Noise from offshore wind turbines

    Energy Technology Data Exchange (ETDEWEB)

    Soendergaard, B.; Plovsing, B.

    2005-07-01

    Noise assessment of wind turbines through calculations is based on sound power levels measured according to e.g. IEC 61400-11. With larger wind turbines and distances some of the calculation models give erroneous results. Noise propagation over water is different from propagation over land. For that reason it is important be able to make valid noise assessments for offshore wind farms. A suggestion for an offshore measurement method is described and a survey of models for noise propagation offshore has been made. (au)

  1. The aerodynamics of wind turbines

    DEFF Research Database (Denmark)

    Sørensen, Jens Nørkær; Mikkelsen, Robert Flemming; Troldborg, Niels

    2013-01-01

    In the paper we present state-of-the-art of research in wind turbine aerodynamics. We start be giving a brief historical review and a survey over aerodynamic research in wind energy. Next, we focus on some recent research results obtained by our wind energy group at Department of Mechanical...... Engineering at DTU. In particular, we show some new results on the classical problem of the ideal rotor and present a series of new results from an on-going research project dealing with the modelling and simulation of turbulent flow structures in the wake behind wind turbines....

  2. Extreme Response for Wind Turbines

    DEFF Research Database (Denmark)

    Toft, Henrik Stensgaard; Sørensen, John Dalsgaard

    2009-01-01

    The characteristic load on wind turbines during operation are among others dependent on the mean wind speed, the turbulence intensity and type and settings of the control system. The characteristic load during operation is normally estimated by statistical extrapolation of a limited number...... of simulated 10min time series of the response according to the wind turbine standard IEC 61400-1. However, this method assumes that the individual 10min time series and the extracted peaks from the time series are independent. In the present paper is this assumption investigated based on field measurements...

  3. Deformation behaviour of turbine foundations

    International Nuclear Information System (INIS)

    Koch, W.; Klitzing, R.; Pietzonka, R.; Wehr, J.

    1979-01-01

    The effects of foundation deformation on alignment in turbine generator sets have gained significance with the transition to modern units at the limit of design possibilities. It is therefore necessary to obtain clarification about the remaining operational variations of turbine foundations. Static measurement programmes, which cover both deformation processes as well as individual conditions of deformation are described in the paper. In order to explain the deformations measured structural engineering model calculations are being undertaken which indicate the effect of limiting factors. (orig.) [de

  4. Failure analysis of turbine blades

    International Nuclear Information System (INIS)

    Iorio, A.F.; Crespi, J.C.

    1989-01-01

    Two 20 MW gas turbines suffered damage in blades belonging to the 2nd. stage of the turbine after 24,000 hours of duty. From research it arises that the fuel used is not quite adequate to guarantee the blade's operating life due to the excess of SO 3 , C and Na existing in combustion gases which cause pitting to the former. Later, the corrosion phenomenon is presented under tension produced by working stress enhanced by pitting where Pb is its main agent. A change of fuel is recommended thus considering the blades will reach the operational life they were designed for. (Author) [es

  5. Aeroderivative gas turbines for cogeneration

    International Nuclear Information System (INIS)

    Horner, M.W.; Thames, J.M.

    1988-01-01

    Aircraft jet engine derivative gas turbines have gained acceptance for cogeneration applications through impressive advances in technology and especially in maintainability and reliability. The best advantages of heavy industrial turbines and of reliable commercial airline jet engines have been successfully joined to meet the requirements for industrial cogeneration service. The next generation is under development and offers improved thermal efficiencies, alternate fuel capabilities, low environmental emissions, flexibility of operation and improved competitive system economics. This paper summarizes the current aero-derivative engine features and advantages with various systems, and discusses advanced features under consideration at this time

  6. Reliability Modeling of Wind Turbines

    DEFF Research Database (Denmark)

    Kostandyan, Erik

    Cost reductions for offshore wind turbines are a substantial requirement in order to make offshore wind energy more competitive compared to other energy supply methods. During the 20 – 25 years of wind turbines useful life, Operation & Maintenance costs are typically estimated to be a quarter...... and uncertainties are quantified. Further, estimation of annual failure probability for structural components taking into account possible faults in electrical or mechanical systems is considered. For a representative structural failure mode, a probabilistic model is developed that incorporates grid loss failures...

  7. Across the dam for turbines; Over dammen etter turbiner

    Energy Technology Data Exchange (ETDEWEB)

    Bakken, Marte

    2010-07-01

    Raanaasfoss is one step closer to upgrading. Model testing in the U.S. have now shown that the upgrade can provide approximately 20 G Wh higher production per year. The power plant is 90 years old and is to be upgraded by six new turbines and generators. Buildings and dams are to remain. (AG)

  8. Discharge, water quality, and native fish abundance in the Virgin River, Utah, Nevada, and Arizona, in support of Pah Tempe Springs discharge remediation efforts

    Science.gov (United States)

    Miller, Matthew P.; Lambert, Patrick M.; Hardy, Thomas B.

    2014-01-01

    Pah Tempe Springs discharge hot, saline, low dissolved-oxygen water to the Virgin River in southwestern Utah, which is transported downstream to Lake Mead and the Colorado River. The dissolved salts in the Virgin River negatively influence the suitability of this water for downstream agricultural, municipal, and industrial use. Therefore, various remediation scenarios to remove the salt load discharged from Pah Tempe Springs to the Virgin River are being considered. One concern about this load removal is the potential to impact the ecology of the Virgin River. Specifically, information is needed regarding possible impacts of Pah Tempe Springs remediation scenarios on the abundance, distribution, and survival of native fish in the Virgin River. Future efforts that aim to quantitatively assess how various remediation scenarios to reduce the load of dissolved salts from Pah Tempe Springs into the Virgin River may influence the abundance, distribution, and survival of native fish will require data on discharge, water quality, and native fish abundance. This report contains organized accessible discharge, water quality, and native fish abundance data sets from the Virgin River, documents the compilation of these data, and discusses approaches for quantifying relations between abiotic physical and chemical conditions, and fish abundance.

  9. Étude par la méthode de Monte Carlo de la phase plastique de la quinuclidine à différentes températures

    Science.gov (United States)

    Jumeau, Daniel; André, Daniel

    La phase plastique (c.f.c.) de la quinuclidine est étudiée à différentes températures par la méthode de Monte Carlo utilisant la technique des matrices de compatibilité. Afin de ne pas modifier la symétrie moyenne du réseau, les centres de masse de molécules sont supposés fixes. Les orientations moléculaires sont choisies de façon aléatoire parmi les 48 orientations équivalentes et discernables du groupe c.f.c. Cela permet une mémorisation préalable des énergies d'interaction entre molécules voisines et un gain de temps de calcul considérable. Nous observons alors un blocage des réorientations moléculaires à basse température, tandis que la symétrie cristalline devient monoclinique. Ceci est interprété en termes de transition de phase dont la température (215 K) et la variation d'énergie (5 kJ mol-1) sont très proches des valeurs expérimentales.

  10. Temperamental dimensions of the TEMPS-A in females with co-morbid bipolar disorder and bulimia.

    Science.gov (United States)

    Rybakowski, Janusz K; Kaminska, Katarzyna; Charytonik, Jolanta; Akiskal, Kareen K; Akiskal, Hagop S

    2014-08-01

    We investigated the effect of co-morbid bipolar disorder and bulimia on temperamental dimensions measured by TEMPS-A, relative to "pure" bulimia and "pure" bipolar disorder, in female patients. The study was performed on 47 patients with bipolar disorder (BD) with a mean age of 36±10 years, 96 patients with bulimia or bulimic type of anorexia, mean age 26±9 years and 50 control healthy females (HC), mean age 29±6 years. Among bulimic patients, a group of 68 subjects with co-morbid bulimia with bipolarity (BD+B) was identified, based on positive score of the Mood Disorder Questionnaire (MDQ). The TEMPS-A questionnaire, 110 questions version, has been used, evaluating five temperament domains: depressive, cyclothymic, hyperthymic, irritable and anxious. Parametric analysis was performed for 4 groups (BD, "pure" bulimia (PB), BD+B and HC), with 28 subjects randomly chosen from each group, using analysis of variance and cluster analysis. All clinical groups significantly differed from control group by having higher scores of depressive, cyclothymic, irritable and anxious temperaments and lower of hyperthymic one. Among patients, significantly higher scores of cyclothymic and irritable temperaments were found in BD+B compared to both PB and BD. These differences were also reflected in cluster analysis, where two clusters were identified. Bipolarity in bulimic patients assessed only by the MDQ. These results show that co-morbid bulimia and bipolar disorder is characterized by extreme dimensions of both cyclothymic and irritable temperaments, significantly higher than each single diagnosis. Possible clinical implications of such fact are discussed. Copyright © 2014 Elsevier B.V. All rights reserved.

  11. WiMAX security and quality of service an end-to-end perspective

    CERN Document Server

    Tang, Seok-Yee; Sharif, Hamid

    2010-01-01

    WiMAX is the first standard technology to deliver true broadband mobility at speeds that enable powerful multimedia applications such as Voice over Internet Protocol (VoIP), online gaming, mobile TV, and personalized infotainment. WiMAX Security and Quality of Service, focuses on the interdisciplinary subject of advanced Security and Quality of Service (QoS) in WiMAX wireless telecommunication systems including its models, standards, implementations, and applications. Split into 4 parts, Part A of the book is an end-to-end overview of the WiMAX architecture, protocol, and system requirements.

  12. Apple F-box Protein MdMAX2 Regulates Plant Photomorphogenesis and Stress Response

    Directory of Open Access Journals (Sweden)

    Jian-Ping An

    2016-11-01

    Full Text Available MAX2 (MORE AXILLARY GROWTH2 is involved in diverse physiological processes, including photomorphogenesis, the abiotic stress response, as well as karrikin and strigolactone signaling-mediated shoot branching. In this study, MdMAX2, an F-box protein that is a homolog of Arabidopsis MAX2, was identified and characterized. Overexpression of MdMAX2 in apple calli enhanced the accumulation of anthocyanin. Ectopic expression of MdMAX2 in Arabidopsis exhibited photomorphogenesis phenotypes, including increased anthocyanin content and decreased hypocotyl length. Further study indicated that MdMAX2 might promote plant photomorphogenesis by affecting the auxin signaling as well as other plant hormones. Transcripts of MdMAX2 were noticeably up-regulated in response to NaCl and Mannitol treatments. Moreover, compared with the wild type, the MdMAX2-overexpressing apple calli and Arabidopsis exhibited increased tolerance to salt and drought stresses. Taken together, these results suggest that MdMAX2 plays a positive regulatory role in plant photomorphogenesis and stress response.

  13. The development of a differential game related to terrorism: Min-Max differential game

    Directory of Open Access Journals (Sweden)

    Abd El-Monem A. Megahed

    2017-07-01

    Full Text Available In this work, we study a differential game related to terrorism: Min-Max differential game taking into account the governmental activities such as the education quality, increasing the chances of labor, social justice, religious awareness and security arrangements. A Min-Max differential game between government and terrorist organizations is considered in this study. To obtain the optimal strategy of solving this problem, we study the analytic form of a Min-Max differential game and the governmental activities. Furthermore, a saddle point of a Min-Max differential game is studied.

  14. Design of Wind Turbine Vibration Monitoring System

    Directory of Open Access Journals (Sweden)

    Shoubin Wang

    2013-04-01

    Full Text Available In order to ensure safety of wind turbine operation and to reduce the occurrence of faults as well as to improve the reliability of wind turbine operation, a vibration monitoring for wind turbine is developed. In this paper, it analyses the enlargement of all the parts of the structure and the working mechanism, the research method of wind turbine operation vibration is introduced, with the focus being the use of the sensor principle. Finally the hardware design and software of this system is introduced and the main function of this system is described, which realizes condition monitoring of the work state of wind turbines.

  15. Aeroelastic instability problems for wind turbines

    DEFF Research Database (Denmark)

    Hansen, Morten Hartvig

    2007-01-01

    This paper deals with the aeroelostic instabilities that have occurred and may still occur for modem commercial wind turbines: stall-induced vibrations for stall-turbines, and classical flutter for pitch-regulated turbines. A review of previous works is combined with derivations of analytical...... stiffness and chordwise position of the center of gravity along the blades are the main parameters for flutter. These instability characteristics are exemplified by aeroelastic stability analyses of different wind turbines. The review of each aeroelastic instability ends with a list of current research...... issues that represent unsolved aeroelostic instability problems for wind turbines. Copyright (c) 2007 John Wiley & Sons, Ltd....

  16. Troubles des conduites alimentaires et tempérament cyclothymique: étude transversale à propos de 107 étudiants Tunisiens

    Science.gov (United States)

    Jaweher, Masmoudi; Sonda, Trabelsi; Uta, Ouali; Inès, Feki; Rim, Sallemi; Imene, Baati; Abdelaziz, Jaoua

    2014-01-01

    Introduction Les objectifs de notre étude ont été d'estimer la prévalence des troubles des conduites alimentaires (TCA) chez les jeunes tunisiens et étudier la relation entre le tempérament cyclothymique et les TCA. Méthodes Nous avons ainsi mené une étude transversale descriptive et analytique. Elle a concerné 107 étudiants de l'Institut de Presse et des Sciences de l'Information de la Manouba, Tunisie. Pour l’évaluation des TCA, nous avons procédé par la passation de l'auto questionnaire EAT 40, dans sa version validée en Tunisie. C'est l'outil le plus utilisé pour le dépistage des TCA dans le monde. Pour l’évaluation du tempérament cyclothymique, nous avons utilisé le TEMPS A dans sa version arabe validée. Une fiche épidémiologique associée a permis de recueillir quelques facteurs sociodémographiques et hygiéno-diététiques. Résultats La prévalence des troubles de conduites alimentaires a été de 24,3%. Le pourcentage des étudiants ayant un score de tempérament cyclothymique ≥14 a été de 37,4%. Une association a été trouvée entre les troubles de conduites alimentaires et le tempérament affectif cyclothymique que ce soit selon l'approche dimensionnelle (p=0,005) ou selon celle catégorielle (p=0,046). Le tempérament cyclothymique multiplie par deux le risque de développer un TCA chez les étudiants de sexe féminin (p=0,04). Conclusion Es TCA sont fréquents chez nos étudiants particulièrement de sexe féminin. De plus, la présence d'un tempérament cyclothymique associé permettrait de suspecter doublement une appartenance au spectre bipolaire et devrait conduire à une attention particulière de la part du clinicien pour définir au mieux les stratégies thérapeutiques. PMID:25404977

  17. Coordinated Control of Cross-Flow Turbines

    Science.gov (United States)

    Strom, Benjamin; Brunton, Steven; Polagye, Brian

    2016-11-01

    Cross-flow turbines, also known as vertical-axis turbines, have several advantages over axial-flow turbines for a number of applications including urban wind power, high-density arrays, and marine or fluvial currents. By controlling the angular velocity applied to the turbine as a function of angular blade position, we have demonstrated a 79 percent increase in cross-flow turbine efficiency over constant-velocity control. This strategy uses the downhill simplex method to optimize control parameter profiles during operation of a model turbine in a recirculating water flume. This optimization method is extended to a set of two turbines, where the blade motions and position of the downstream turbine are optimized to beneficially interact with the coherent structures in the wake of the upstream turbine. This control scheme has the potential to enable high-density arrays of cross-flow turbines to operate at cost-effective efficiency. Turbine wake and force measurements are analyzed for insight into the effect of a coordinated control strategy.

  18. Turbines for nuclear power plants. 2.ed.

    International Nuclear Information System (INIS)

    Troyanovskij, B.M.

    1978-01-01

    In the second edition of the book considered are practically all the main problems of calculation and operation of turbines and turbine installations of nuclear power plants. As compared to the first edition, essentially addes is the reproduction of the problem on combined generation of heat and electric energy. Also represented is detailed material on methods of preliminary evaluation of turbine effectiveness. Considered are peculiarities of turbine operation on wet steam and the basis of their thermal calculation. Much attention is payed to the problem of wet stream current in the turbine elements and wetness effect on their characteristics. Problems of wetness separation and moving blade erosion as well as other turbine elements are extracted in a special section. Given are structural schemes of different methods of innerchannel and periphery wet removal as well as experimental materials on their effectiveness. Given are descriptions and critical analysis of a great number of typical constructions of nuclear power plant steam turbines, produced by native plants as well as by the main foreign firms. Considered also are constructions of outside separators and steam superheaters. Separately given is the problem of rotation frequency choise of nuclear power plant wet steam turbines. Represented are materials on turbine installation tests, considered are the problems of turbine starting and manoeuvrability, analyzed are their typical jailures and damages. One of the sections of the book is devoted to gas turbine installations of nuclear power plants. Different material on this theme scattered before in various sources is summarized in the book

  19. New guidelines for wind turbine gearboxes

    Energy Technology Data Exchange (ETDEWEB)

    McNiff, B. [McNiff Light Industry, Blue Hill, ME (United States); Errichello, R. [GEARTECH, Townsend, MT (United States)

    1997-12-31

    The American Gear Manufacturers Association in cooperation with the American Wind Energy Association will soon be publishing AGMA/AWEA 921-A97 {open_quotes}Recommended Practices for Design and Specification of Gearboxes for Wind Turbine Generator Systems.{close_quotes} Much has been learned about the unique operation and loading of gearboxes in wind turbine applications since the burgeoning of the modern wind turbine industry in the early 1980`s. AGMA/AWEA 921-A97 documents this experience in a manner that provides valuable information to assist gear manufacturers and wind turbine designers, operators, and manufacturers in developing reliable wind turbine gearboxes. The document provides information on procurement specification development, wind turbine architecture, environmental considerations, and gearbox load determination, as well as the design, manufacturing, quality assurance, lubrication, operation and maintenance of wind turbine gearboxes. This paper presents the salient parts of the practices recommended in AGMA/AWEA 921-A97.

  20. Wind turbines, is it just wind?

    International Nuclear Information System (INIS)

    Boiteux, M.

    2012-01-01

    The author first outlines that wind energy is not only random, but almost absent in extreme situations when it would be needed (for example and notably, very cold weather without wind). He suggests the association of a gas turbine to each wind turbine, so that the gas turbine will replace non operating wind turbines. He notices that wind turbines are not proximity energy as they were said to be, and that profitability in fact requires tens of grouped giant wind turbines. He also outlines the high cost of construction of grids for the connection of these wind turbines. Thus, he states that wind energy is far from being profitable in the present conditions of electricity tariffs in France