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1

Probability distribution of von Mises stress in the presence of pre-load.  

SciTech Connect (OSTI)

Random vibration under preload is important in multiple endeavors, including those involving launch and re-entry. There are some methods in the literature to begin to address this problem, but there is nothing that accommodates the existence of preloads and the necessity of making probabilistic statements about the stress levels likely to be encountered. An approach to achieve to this goal is presented along with several simple illustrations.

Segalman, Daniel Joseph; Field, Richard V., [Sandia National Laboratories, Albuquerque, NM; Reese, Garth M. [Sandia National Laboratories, Albuquerque, NM

2013-04-01T23:59:59.000Z

2

Money, Banking and Dynamics: Two Wicksellian routes from Mises to Hayek and Schumpeter  

E-Print Network [OSTI]

Money, Banking and Dynamics: Two Wicksellian routes from Mises to Hayek and Schumpeter By AGNÃ?S be traced back to Wicksell, going from Mises whose Theory of Money and Credit provides, as we shall see theories of business cycles. In this connection, Mises' Theory of Money and Credit and, in particular, his

Paris-Sud XI, Université de

3

MML clustering of multi-state, Poisson, vonMises circular and Gaussian distributions  

Science Journals Connector (OSTI)

Minimum Message Length (MML) is an invariant Bayesian point estimation technique which is also statistically consistent and efficient. We provide a brief overview of MML inductive inference (Wallace C.S. and Boulton D.M. 1968. Computer Journal, 11: ... Keywords: MML, Snob, classification, clustering, coding, induction, information theory, intrinsic classification, machine learning, minimum message length, mixture modelling, numerical taxonomy, statistical inference, unsupervised learning

Chris S. Wallace; David L. Dowe

2000-01-01T23:59:59.000Z

4

Definition und Klassifizierung von Energiespeichern  

Science Journals Connector (OSTI)

Abb. 2.3 Definition von sektorenübergreifenden Energiespeichern am Beispiel von Power-to-Heat, flexibler Kraft-W...

Michael Sterner; Ingo Stadler

2014-01-01T23:59:59.000Z

5

Theodor von Oppolzer  

Science Journals Connector (OSTI)

... VON OPPOLZER, one of the most eminent of modern astronomers, died at Vienna on December 26, 1886. He was the only son of Johannes von Oppolzer, the famous pathologist ...

1887-01-06T23:59:59.000Z

6

Bereitstellen von elektrischer Energie  

Science Journals Connector (OSTI)

Für das Gestalten und Bemessen von Photovoltaik-Anlagen sind mindestens die vier folgenden Fragen... Soll eine Inselversorgung aufgebaut werden? ...

Manfred Schmidt

2013-01-01T23:59:59.000Z

7

Mathematical model of stress formation during vacuum resin infusion I.B. Sevostianov, V.E. Verijenko*, C.J. von Klemperer, B. Chevallereau1  

E-Print Network [OSTI]

Mathematical model of stress formation during vacuum resin infusion process I.B. Sevostianov, V manufacturing technology based on vacuum infusion which is also known as resin film infusion technology to be infused by the vacuum to completely wet-out the reinforcements and eliminate air voids in the laminate

Sevostianov, Igor

8

Effect of high strain rates on peak stress in a Zr-based bulk metallic glass  

SciTech Connect (OSTI)

The mechanical behavior of Zr{sub 41.25}Ti{sub 13.75}Cu{sub 12.5}Ni{sub 10}Be{sub 22.5} (LM-1) has been extensively characterized under quasistatic loading conditions; however, its mechanical behavior under dynamic loading conditions is currently not well understood. A Split-Hopkinson pressure bar (SHPB) and a single-stage gas gun are employed to characterize the mechanical behavior of LM-1 in the strain-rate regime of 10{sup 2}-10{sup 5}/s. The SHPB experiments are conducted with a tapered insert design to mitigate the effects of stress concentrations and preferential failure at the specimen-insert interface. The higher strain-rate plate-impact compression-and-shear experiments are conducted by impacting a thick tungsten carbide (WC) flyer plate with a sandwich sample comprising a thin bulk metallic glass specimen between two thicker WC target plates. Specimens employed in the SHPB experiments failed in the gage-section at a peak stress of approximately 1.8 GPa. Specimens in the high strain-rate plate-impact experiments exhibited a flow stress in shear of approximately 0.9 GPa, regardless of the shear strain-rate. The flow stress under the plate-impact conditions was converted to an equivalent flow stress under uniaxial compression by assuming a von Mises-like material behavior and accounting for the plane strain conditions. The results of these experiments, when compared to the previous work conducted at quasistatic loading rates, indicate that the peak stress of LM-1 is essentially strain rate independent over the strain-rate range up to 10{sup 5}/s.

Sunny, George; Yuan Fuping; Prakash, Vikas [Department of Mechanical and Aerospace Engineering, Case Western Reserve University, Cleveland, Ohio 44106-7222 (United States); Lewandowski, John [Department of Materials Science and Engineering, Case Western Reserve University, Cleveland, Ohio 44106-7222 (United States)

2008-11-01T23:59:59.000Z

9

Anlauf von Motoren  

Science Journals Connector (OSTI)

Beim Anlassen von Motoren spielen sich zwei Ausgleichsvorgänge ab. Durch das Anlegen der Wicklung an eine Spannung entsteht ein elektrischer Ausgleichsvorgang, welcher im wesentlichen einen überlagerten abklingen...

Dr.-Ing. W. Schuisky

1951-01-01T23:59:59.000Z

10

Handhabung von flüssigem Wasserstoff  

Science Journals Connector (OSTI)

Die sichere Handhabung von Wasserstoff ist heute im industriellen sowie kommerziellen Bereich ... im Rahmen der U.S.-Raumfahrtprogramme flüssiger Wasserstoff in großen Mengen produziert, transportiert, gespeicher...

Prof. Dr. Ing. habil. Walter Peschka

1984-01-01T23:59:59.000Z

11

Beispiele von Montagesystemen  

Science Journals Connector (OSTI)

Die nachfolgend beschriebenen Beispiele zeigen Lösungsmöglichkeiten für die Montage von Erzeugnissen und Erzeugnisbaugruppen, die in Klein-, Mittel- oder Großserien hergestellt werden.

Peter Konold; Herbert Reger

1997-01-01T23:59:59.000Z

12

Das energetische Verhalten von Traktionsbatterien  

Science Journals Connector (OSTI)

Soll die Eignung von Traktionsbatterien in elektrischen Straßenfahrzeugen beurteilt werden, werden neben wirtschaftlichen Aspekten meist die energetischen Eigenschaften von Batterien als Kriterien herangezogen...

W. Burkner

1991-01-01T23:59:59.000Z

13

Verhalten von Wasserstoff in Titanlegierungen.  

E-Print Network [OSTI]

??Ziel der vorliegenden Arbeit ist es, am Beispiel von Titanlegierungen ein besseres Verständnis über die Auswirkungen von Wasserstoff auf das Phasengleichgewicht und über die Diffusion… (more)

Keller, Thorsten

2005-01-01T23:59:59.000Z

14

Seite 1 von 64 Modulhandbuch  

E-Print Network [OSTI]

............................................... 14 Module Chemie .................................................................................................................................... 16 Chemie I, Teil 1 (von 3): Allgemeine und Anorganische Chemie ..................................................... 16 Chemie I, Teil 2 (von 3): Physikalische Chemie I - Grundlagen der Thermodynamik

Rossak, Wilhelm R.

15

DC Resistivity Survey (Mise-Á-La-Masse) | Open Energy Information  

Open Energy Info (EERE)

Mise-Á-La-Masse) Mise-Á-La-Masse) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: DC Resistivity Survey (Mise-Á-La-Masse) Details Activities (0) Areas (0) Regions (0) NEPA(0) Exploration Technique Information Exploration Group: Geophysical Techniques Exploration Sub Group: Electrical Techniques Parent Exploration Technique: Electrical Profiling Configurations Information Provided by Technique Lithology: Rock composition, mineral and clay content Stratigraphic/Structural: Detection of permeable pathways, fracture zones, faults Hydrological: Resistivity influenced by porosity, grain size distribution, permeability, fluid saturation, fluid type and phase state of the pore water Thermal: Resistivity influenced by temperature Dictionary.png

16

Einfluß von Nichtelektrolyten auf die Fällung von Kolloiden durch Elektrolyte und auf die Adsorption von Ionen  

Science Journals Connector (OSTI)

1. Es wurde die Koagulation des Mangandioxydsols durch Kupfersulfat und Silbernitrat in Gegenwart von Aethylalko...

K. C. Sen

1926-04-01T23:59:59.000Z

17

Stephanie von Numers | Department of Energy  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Stephanie von Numers About Us Stephanie von Numers - Communications and Web Coordinator, Education & Workforce Development Stephanie von Numers joined the U.S. Department of...

18

Asymmetric Yield Function Based on the Stress Invariants for Pressure Sensitive Metals  

SciTech Connect (OSTI)

A general asymmetric yield function is proposed with dependence on the stress invariants for pressure sensitive metals. The pressure sensitivity of the proposed yield function is consistent with the experimental result of Spitzig and Richmond (1984) for steel and aluminum alloys while the asymmetry of the third invariant is preserved to model strength differential (SD) effect of pressure insensitive materials. The proposed yield function is transformed in the space of the stress triaxaility, the von Mises stress and the normalized invariant to theoretically investigate the possible reason of the SD effect. The proposed plasticity model is further extended to characterize the anisotropic behavior of metals both in tension and compression. The extension of the yield function is realized by introducing two distinct fourth-order linear transformation tensors of the stress tensor for the second and third invariants, respectively. The extended yield function reasonably models the evolution of yield surfaces for a zirconium clock-rolled plate during in-plane and through-thickness compression reported by Plunkett et al. (2007). The extended yield function is also applied to describe the orthotropic behavior of a face-centered cubic metal of AA 2008-T4 and two hexagonal close-packed metals of high-purity-titanium and AZ31 magnesium alloy. The orthotropic behavior predicted by the generalized model is compared with experimental results of these metals. The comparison validates that the proposed yield function provides sufficient predictability on SD effect and anisotropic behavior both in tension and compression. When it is necessary to consider r-value anisotropy, the proposed function is efficient to be used with nonassociated flow plasticity by introducing a separate plastic potential for the consideration of r-values as shown in Stoughton & Yoon (2004, 2009).

Jeong Wahn Yoon; Yanshan Lou; Jong Hun Yoon; Michael V. Glazoff

2014-05-01T23:59:59.000Z

19

Die Knitterfestausrüstung von Zellulosefasertextilien  

Science Journals Connector (OSTI)

Im vorausgehenden „Allgemeinen Teil “wurde der Vorgang der Zellulosevernetzung mit N-haltigen und N-freien reaktiven Mitteln von theoretischer und chemischer Seite aus behandelt. Es wurden insbesondere verschi...

Prof. Dr. phil. Herbert M. Ulrich

1968-01-01T23:59:59.000Z

20

Ionisierungsspannung von Methan  

Science Journals Connector (OSTI)

In einer näher skizzierten Versuchsanordnung wird die Ionisierungsspannung von Methan zu 14,58±0,05 Volt, die...4?Molekel erforderliche Energie zu 15,40±0,05 Volt in guter Übereinstimmung mit der für den homogene...

Erich Pietsch; Gertrud Wilcke

1927-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "von mises stress" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

Hilbert von Neumann modules  

E-Print Network [OSTI]

We introduce a way of regarding Hilbert von Neumann modules as spaces of operators between Hilbert space, not unlike [Skei], but in an apparently much simpler manner and involving far less machinery. We verify that our definition is equivalent to that of [Skei], by verifying the `Riesz lemma' or what is called `self-duality' in [Skei]. An advantage with our approach is that we can totally side-step the need to go through $C^*$-modules and avoid the two stages of completion - first in norm, then in the strong operator topology - involved in the former approach. We establish the analogue of the Stinespring dilation theorem for Hilbert von Neumann bimodules, and we develop our version of `internal tensor products' which we refer to as Connes fusion for obvious reasons. In our discussion of examples, we examine the bimodules arising from automorphisms of von Neumann algebras, verify that fusion of bimodules corresponds to composition of automorphisms in this case, and that the isomorphism class of such a bimodule...

Bikram, Panchugopal; Srinivasan, R; Sunder, V S

2011-01-01T23:59:59.000Z

22

Synthese und Eigenschaften von Kohlenstoffnitriden.  

E-Print Network [OSTI]

??In der hier vorliegenden Arbeit über die „Synthese und Eigenschaften von Kohlenstoffnitriden“ wird im ersten Teil über die Synthese, die Strukturaufklärung, thermische Stabilität und die… (more)

Horvath-Bordon, Elisabeta

2004-01-01T23:59:59.000Z

23

Entwicklung von Web-Anwendungen  

Science Journals Connector (OSTI)

Die herkömmliche Technik für die Entwicklung von Anwendungen, die über eine graphische Benutzungsoberfläche bedient werden, zielt darauf ab, Programme zu entwickeln, die auf einem voll ausgestatteten Arbeitspl...

Prof. Dr.-Ing. Johannes Brauer

2014-01-01T23:59:59.000Z

24

Techniken zur energetischen Verwendung von Wasserstoff  

Science Journals Connector (OSTI)

Die folgenden Beispiele zur technischen Verwendung von Wasserstoff als Sekundär-energieträger sollen vor allem der Illustration von Anwendungen dienen. Es ist nicht beabsichtigt, hier einen geschlossenen Überb...

Walter Peschka; Hartmut Wendt

1989-01-01T23:59:59.000Z

25

Zur ultraschnellen Reaktionsdynamik von Wasserstoff und Grenzflachenstruktur von  

E-Print Network [OSTI]

Zur ultraschnellen Reaktionsdynamik von Wasserstoff und Grenzfl¨achenstruktur von Wasser auf der Ru¨achen . . . . . . . . . . . . . . . . . 30 3 Grundlagen der Adsorptionssysteme 33 3.1 Wasserstoff auf Ru(001 die Wasserstoff­Br¨uckenbindung . . . . . . . . 41 3.2.2 Kristallines Eis im Volumen

Wolf, Martin

26

Die Bedeutung von nationaler Kultur für die Gestaltung von Informationssystemen  

Science Journals Connector (OSTI)

Bereits seit den 1970er-Jahren wird der Einfluss von Kultur auf Informationssysteme untersucht (Gallivan und Srite 2005). Leidner und Kayworth (2006) identifizieren insgesamt 85 Forschungsarbeiten, die den Einflu...

Dr. Tyge-F. Kummer; Prof. Dr. Jan Marco Leimeister…

2012-12-01T23:59:59.000Z

27

Auswirkung der Verwendung von Methan an Stelle von Propan  

Science Journals Connector (OSTI)

Um zu prüfen, welche Verhältnisse sich ergeben, wenn man an Stelle von Propan, wie es in den international vorgeschlagenen Dreistoff-Gemischen vorgesehen ist, Methan heranzöge, wurden für das Normprüfgas folgende...

Prof. Dr. Ing. Fritz Schuster…

1961-01-01T23:59:59.000Z

28

Veresterungsgeschwindigkeiten von Alkoholen in Essigsäure  

Science Journals Connector (OSTI)

Für die Lösungen von Propanol-1, Propanol-2, Butanol-1, Butanol-2, Methylpropanol-1, Methylpropanol-2, Pentanol-1, Pentanol-2, Pentanol-3, Methyl-2-butanol-4, Oktanol-1, Oktanol-2, ferner der Essigsäureester d...

Anton Kailan; Rudolf Raff

1932-01-01T23:59:59.000Z

29

Bewegungsverlauf und Abstimmbedingungen von Nachführgetrieben  

Science Journals Connector (OSTI)

Abschließend läßt sich sagen, daß die Einhaltung der Stabilität, wenn man von Getriebe A nach C fortschreitet, immer höhere Anforderungen stellt, was durch den zunehmend verwickeiteren Aufbau der Getriebe in dyna...

Dr.-Ing. C. A. Traenkle

1950-01-01T23:59:59.000Z

30

Reaktionen zur Frühdiagnose von Krebserkrankungen  

Science Journals Connector (OSTI)

Im Jahre 1955 hat der Minister für Wirtschaft und Verkehr uns Mittel für Reaktionen zur Frühdiagnose von Krebserkrankungen zur Verfügung gestellt. Die Untersuchungen waren ursprünglich auf 3 Jahre geplant und ...

Prof. Dr. Karl Hinsberg

1958-01-01T23:59:59.000Z

31

Das Prsidium Abgabe von Gerten  

E-Print Network [OSTI]

Das Pr�sidium Abgabe von Ger�ten 1. Das Institut f�r Stahlbau hat folgendes abzugeben: 1 Tafel gr�n Schiebemechanismus Grundfl�che Ca. 2m x 1 m Ausklappbar (ca. Fl�che 4m x 1 m). 1 Tafel gr�n Fix ca. 3m x 1,45m

Nejdl, Wolfgang

32

Studies of solid high-power targets Goran Skoro  

E-Print Network [OSTI]

VonMisesStress[MPa] Comparison of the simulations results: Stress in real target vs. stress in tungsten wire Stress in tungsten or 3) cm in diameter. · Energy density per pulse ~ 300 J/cc. · Rotating toroidal ring (operating-beam lifetime/fatigue tests hardly possible · Shock can be modelled: Finite Element Software (FES) · Target

McDonald, Kirk

33

L'église catholique au Gabon. De l'entreprise missionnaire à la mise en place d'une église locale 1844 - 1982.  

E-Print Network [OSTI]

??La naissance des Eglises locales en Afrique, disons-le, est sans conteste l’œuvre première de vaillants missionnaires parfois désintéressés. La mise en place des premières structures… (more)

Assoumou Nsi, Michel

2011-01-01T23:59:59.000Z

34

Perturbation theory of von Neumann Entropy  

E-Print Network [OSTI]

In quantum information theory, von Neumann entropy plays an important role. The entropies can be obtained analytically only for a few states. In continuous variable system, even evaluating entropy numerically is not an easy task since the dimension is infinite. We develop the perturbation theory systematically for calculating von Neumann entropy of non-degenerate systems as well as degenerate systems. The result turns out to be a practical way of the expansion calculation of von Neumann entropy.

Xiao-yu Chen

2009-02-27T23:59:59.000Z

35

Einsatzmöglichkeiten und spezifischer Energieverbrauch von Elektrostraßenfahrzeugen  

Science Journals Connector (OSTI)

Das Elektrostraßenfahrzeug hat heute einen Entwicklungsstand erreicht, der es für eine Vielzahl von Anwendungen interessant macht. Dabei kann die Elektrotraktion nicht nur einen wirksamen Beitrag zur Lärm- und...

U. Wagner

1991-01-01T23:59:59.000Z

36

Primärenergieeinsatz und Emissionsvergleich von Elektrostraßen-Fahrzeugen  

Science Journals Connector (OSTI)

Elektrostraßenfahrzeuge fahren emissionsfrei und im Geschwindigkeitsbereich bis 50 km/h auch praktisch geräuschlos. Dennoch ist mit der Nutzung von Elektrofahrzeugen in der Bundesrepublik Deutschland die Emiss...

B. Sporckmann

1991-01-01T23:59:59.000Z

37

Sicherheitsaspekte von Wasserstoff als Energieträger und Energiespeicher  

Science Journals Connector (OSTI)

Wasserstoff ist Grundstoff der Chemietechnik und wird in der chemischen Industrie seit Jahrzehnten großtechnisch sicher beherrscht. Herstellung, Speicherung, Transport und Nutzung von Wasserstoff sind dort im ...

Manfred Fischer; Helmut Eichert

1989-01-01T23:59:59.000Z

38

Sicherheitsaspekte von Wasserstoff als Energieträger und Energiespeicher  

Science Journals Connector (OSTI)

Wasserstoff ist Grundstoff der Chemietechnik und wird in der chemischen Industrie seit Jahrzehnten großtechnisch sicher beherrscht. Herstellung, Speicherung, Transport und Nutzung von Wasserstoff sind dort im ...

Prof. Dr.-Ing. Carl-Jochen Winter; Dr.-Ing. Joachim Nitsch

1986-01-01T23:59:59.000Z

39

Steuerung, Regelung und Betriebsführung von Windkraftanlagen  

Science Journals Connector (OSTI)

Die Westernmill war die erste Windkraftanlage, die ohne menschliche Betreuung auskam. Bei ihr sind allerdings die Aufgaben von Steuerung, Regelung und Betriebsführung noch völlig miteinander verwoben. Zwar ste...

Prof. Dr.-Ing. Robert Gasch; Prof. Dr.-Ing. Jochen Twele…

2005-01-01T23:59:59.000Z

40

GDI-Sigma-Technik von Mitsubishi  

Science Journals Connector (OSTI)

Mitsubishi hat mit dem „Sigma-Projekt“ untersucht, inwieweit der Kraftstoffverbrauch von Ottomotoren mit direkter Kraftstoffeinspritzung durch die Kombination mit peripheren Systemen gesenkt werden kann. Dabei...

Richard Backhaus

2000-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "von mises stress" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

Labormedizinische Diagnostik von Lebererkrankungen: Neue Erkenntnisse  

Science Journals Connector (OSTI)

Die während der vorausgegangenen 30 Jahre erzielten Fortschritte auf dem Gebiet der labormedizinischen Diagnostik von Lebererkrankungen sollen am Beispiel akuter und chronischer Hepatitiden, insbesondere der V...

H. P. Seelig; R. Seelig

1988-01-01T23:59:59.000Z

42

Mise en place du systme de TMA dans les croles du Surinam : dveloppement interne ou contact de langues1 ?  

E-Print Network [OSTI]

1 Mise en place du système de TMA dans les créoles du Surinam : développement interne ou contact de anglaise du Surinam, et du ndyuka en particulier, montre une régularité à la fois dans les formes et dans différentes époques de contact. Les créoles de base lexicale anglaise du Surinam, résultat du contact entre

Paris-Sud XI, Université de

43

TUDE SPECTROMTRIQUE DE LA LUMIRE MISE PAR LE PLA SMA ANODIQUE PENDANT L'EFFET D'ANODE  

E-Print Network [OSTI]

99 �TUDE SPECTROM�TRIQUE DE LA LUMI�RE �MISE PAR LE PLA SMA ANODIQUE PENDANT L'EFFET D'ANODE DANS. Abstract. 2014 One can determine fundamental properties of anodic plasma by studiing Li and K isolated travaux ont eu pour objet l'étude électrochimique de l'effet d'anode (voir, par exemple [1

Boyer, Edmond

44

Spektroskopische Vorgänge in Explosionszonen von Methan und anderen Kohlenwasserstoffen  

Science Journals Connector (OSTI)

Zur Untersuchung gelangen stehende Explosionen von Methan-Sauerstoff und vergleichsweise die von Acetylen- bzw. Benzoldampf-Sauerstoff. Die einzelnen Zonen bei der Verbrennung werden spektrographisch festgehal...

F. J. Lauer

1933-01-01T23:59:59.000Z

45

Bestimmung kleiner Mengen von Beimengungen in Wasserstoff und die Bereitung von reinem Wasserstoff mit der Durchfluß-Sorptionsmethode  

Science Journals Connector (OSTI)

Es wurde über die analytische Bestimmung von Spurenbeimengungen in elektrolytischem Wasserstoff mittels der Methode der Wärmedesorption, sowie über die Bereitung von reinem Gas mit der Durchfluß-Sorptionsmetho...

Eva Smolková; Ladislav Feltl; Ota Grubner

1962-01-01T23:59:59.000Z

46

Seite 1 von 3 Fachgebiet Rechnerarchitektur  

E-Print Network [OSTI]

-Zahl Zweikomplement-Zahl 0100 1101 1001 0001 i) BCD (Binary coded decimal) stellt jede (vorzeichenlose) Dezimalziffer mittels 4 Bit dar. In der ungepackten Version (unpacked BCD) ist je Byte eine Ziffer, in EBCDIC (von IBM) werden die oberen 4 Bits mit 1111 belegt. Bei der gepackten #12;Seite 2 von 3 Version (packed BCD) sind

Hoffmann, Rolf

47

Zur Frage der Analyse von Hydrogenisierungsgasen (Gewichtsbestimmung der gesättigten Kohlenwasserstoffe)  

Science Journals Connector (OSTI)

1. Durchgeführt wurden Analysen verschiedener Proben von Hydrogenisierungsgasen, die in diskontinuierlich betrie...

P. W. Putschkow

1936-01-01T23:59:59.000Z

48

E-Print Network 3.0 - anwendung von neutronenstreuung Sample...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Ornamenten und chinesischen Codes. Praktische Anwendung findet der Turm von Hanoi als Test in der... von Hanoi - Graphen weisen den rechten Weg Der Turm von Hanoi ist ein...

49

E-Print Network 3.0 - anwendung von uhpfrc-tubbingen Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Ornamenten und chinesischen Codes. Praktische Anwendung findet der Turm von Hanoi als Test in der... von Hanoi - Graphen weisen den rechten Weg Der Turm von Hanoi ist ein...

50

E-Print Network 3.0 - anwendung von radiopharmaka Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Ornamenten und chinesischen Codes. Praktische Anwendung findet der Turm von Hanoi als Test in der... von Hanoi - Graphen weisen den rechten Weg Der Turm von Hanoi ist ein...

51

Einfluss von Stoffdatenmodellen auf die Simulation von Prozessen mit verflüssigtem Erdgas (LNG).  

E-Print Network [OSTI]

??Die Wertschöpfungskette von LNG (verflüssigtes Erdgas) besteht aus den Prozessen der Verflüssigung, dem Transport und der Verdampfung. Voraussetzung für die optimale Auslegung dieser Prozesse ist… (more)

Dauber, Florian

2011-01-01T23:59:59.000Z

52

Theodor Ritter von Oppolzer (1841–1886)  

Science Journals Connector (OSTI)

... of the Austrian astronomer Theodor Ritter von Oppolzer who from 1876 until his death on December 26, 1886, held the chair of astronomy at Vienna. Born at Prague, he was ...

1941-11-01T23:59:59.000Z

53

Von den Simultanreaktionen und der reaktionslosen Pause  

Science Journals Connector (OSTI)

Im Anschluß an eine kritische Untersuchung vonF. Halla 2 wird gezeigt, daß es in der chemischen Simultankinetik “reaktionslose Pausen” geben kann, was man unter solchen zu verstehen hat und wie si...

A. Skrabal

1953-01-01T23:59:59.000Z

54

Der Palast von Iraq al-Amir.  

E-Print Network [OSTI]

??In der vorliegenden Arbeit wurde der Qasr el-Abd von Iraq al-Amir nach typologischen und stilistischen Kriterien untersucht und eine Verbindung mit dem antiken Bericht des… (more)

Bürge, Teresa

2011-01-01T23:59:59.000Z

55

Strukturelle Charakterisierung von Galliumnitrid-Nanopartikeln.  

E-Print Network [OSTI]

??In dieser Arbeit wurden azidische Single-Molecule-Precursoren zur Herstellung von GaN-Halbleiternanoteilchen verwendet. Die erzeugten Teilchen können als Kompositmaterial beschrieben werden und konnten über einen weiten Kristallitgrößenbereich… (more)

Stowasser, Frank

2004-01-01T23:59:59.000Z

56

Elektrische und optische Charakterisierung von Galliumnitrid.  

E-Print Network [OSTI]

??Bei der elektrischen Charakterisierung der untersuchten LPCVD-n-GaN-Schichten stand die Klärung der Herkunft der hohen residuären Dotierung im Vordergrund. Mit Hilfe von SIMS-Untersuchungen wurde gezeigt, da߅ (more)

Meister, Dirk

2001-01-01T23:59:59.000Z

57

Charakterisierung von Grapefruitöl und -saft durch HPLC  

Science Journals Connector (OSTI)

Es wird eine schnelle und zuverlässige HPLC-Methode zur Charakterisierung von Grapefruitöl und -saft vorgestellt. Der individuelle Gehalt an Nootkaton,...1H- und13C-NMR-Spektroskopie identifiziert. Eine der ident...

Hartwig Schulz; Gerd Albroscheit…

1992-09-01T23:59:59.000Z

58

Agnes von Matuschka Centre for Entrepreneurship  

E-Print Network [OSTI]

�ndungsunterst�tzung an der TU Berlin Unter dem Dach des Centre for Entrepreneurship (CfE) b�ndelt die TU Berlin ihre Aktivit�ten rund um das Thema Entrepreneurship. Zum CfE geh�ren der Gr�ndungsservice und das #12;Fachgebiet f�r Entrepreneurship und Innovationsmanagement. Das CfE wird gemeinsam geleitet von Agnes von Matuschka (Leitung Gr

Nabben, Reinhard

59

The role of von Neumann and Lüders postulates in the EPR-Bohm-Bell considerations: Did EPR make a mistake?  

E-Print Network [OSTI]

We show that the projection postulate plays a crucial role in the discussion on the so called "quantum nonlocality", in particular in the EPR-argument. We stress that the original von Neumann projection postulate was crucially modified by extending it to observables with degenerate spectra (the L\\"uders postulate) and we show that this modification is highly questionable from a physical point of view, and it is the real source of "quantum nonlocality". The use of the original von Neumann postulate eliminates this problem: instead of "action at the distance"-nonlocality, we obtain a classical measurement nonlocality. It seems that EPR did mistake in their 1935-paper: if one uses correctly von Neumann projection postulate, no ``elements of reality'' can be assigned to entangled systems. Our analysis of the EPR and projection postulate makes clearer Bohr's considerations in his reply to Einstein.

Andrei Khrennikov

2008-01-02T23:59:59.000Z

60

Zündung und Verbrennung beim Einblasen von Brenngas in heiße Überschallströmungen  

Science Journals Connector (OSTI)

Bei einer experimentellen Untersuchung der Vorgänge bei der Zündung und der Verbrennung von Wasserstoff und Methan, die transversal durch Düsen und durch Bohrungen...Ma=3 und statische Temperaturen von 700 K bis ...

Herbert Wilhelmi

1974-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "von mises stress" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

Tierexperimentelle Untersuchungen zur Frage einer chronischen Toxizität von 5-Hydroxymethylfurfural  

Science Journals Connector (OSTI)

Nach den bislang vorliegenden Untersuchungen scheint die Toxizität von 5-Hydroxymethylfurfural sehr gering zu sein (1). Sowohl ... 50 bei Mäusen betrug bei intravenöser Applikation von 5-Hydroxymethylfurfural 0,7...

Prof. Dr. G. Czok; Prof. Dr. H. Förster

1973-01-01T23:59:59.000Z

62

Energiemethoden der Mechanik / Prof. Popov / Vorlesung 11. Das Verfahren von Castigliano II. Die Stze von Betti und Maxwell. Literatur: 1. W.H. Mller, Technische Mechanik, 21.4 (Stze von M&B)  

E-Print Network [OSTI]

Sätze von Betti und Maxwell. Literatur: 1. W.H. Müller, Technische Mechanik, 21.4 (Sätze von M&B) oder 2 von Maxwell: ij ji = . II. Der Satz von Betti (auch Reziprozitäts- satz von Betti). Wenn ein unter der Einwirkung des Kräftepaars. Nach dem Satz von Betti: p FF h p V = . Unter der Wirkung des

Berlin,Technische Universität

63

Graphenbisection bei der Generierung von Clusterbaumen  

E-Print Network [OSTI]

von G ist definiert als die mini- malen Kosten aller Bisectionen (A, B). c) MinBisection ist das dessen Kanten alle Verbindungen der L¨ange 1 dieser Punkte sind. Ein Grid-Graph ist ein Teilgraph des) Es gibt einen Algorithmus mit Laufzeit O(n5 ), der f¨ur Grid-Graphen die Bisectionsweite berechnet

Jäger, Gerold

64

Normalizers of Finite von Neumann Algebras  

E-Print Network [OSTI]

\\subseteq M is an inclusion of separable II_1 factors. We show that N_M(B) imposes a certain "discrete" structure on the generated von Neumann algebra. By analyzing the bimodule structure of certain subalgebras of N_M(B)'', this leads to a "Galois...

Cameron, Jan Michael

2010-10-12T23:59:59.000Z

65

Seite 1 von 7 Safeguarding good academic  

E-Print Network [OSTI]

Seite 1 von 7 Safeguarding good academic practice Reacting to spectacular cases of misconduct (German Research Foundation, DFG) presented "Proposals for safeguarding good academic practice") of November 1997 and the DFG memorandum "Safeguarding good academic practice" of 1998. Rules for safeguarding

Heermann, Dieter W.

66

Von Economo Neurons in the Elephant Brain  

E-Print Network [OSTI]

Von Economo Neurons in the Elephant Brain ATIYA Y. HAKEEM,1 * CHET C. SHERWOOD,2 CHRISTOPHER J elephants. The VENs in the elephant are primarily found in similar locations to those in the other species- nids, cetaceans, and elephants, and may reflect a specialization for the rapid transmission of crucial

Allman, John M.

67

Seite 1 von 7 Fachgebiet Rechnerarchitektur  

E-Print Network [OSTI]

0100 1101 1001 0001 1110 1110 1110 1111 i) BCD (Binary coded decimal) stellt jede (vorzeichenlose) Dezimalziffer mittels 4 Bit dar. In der ungepackten Version (unpacked BCD) ist je Byte eine Ziffer, in EBCDIC (von IBM) werden die oberen 4 Bits mit 1111 belegt. Bei der gepackten Version (packed BCD) sind zwei

Hoffmann, Rolf

68

3D Postprozessor Diplomarbeit von Samuel Gerber  

E-Print Network [OSTI]

3D Postprozessor Diplomarbeit von Samuel Gerber Fachhochschule Aargau FHA University of Applied¨angsschnitt . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.3.4 Querschnit . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2.3.5 3D-Bilder . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2.4 3D Ansicht . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2.5 Bericht

Gerber, Samuel

69

On Koopman-von Neumann Waves  

E-Print Network [OSTI]

In this paper we study the classical Hilbert space introduced by Koopman and von Neumann in their operatorial formulation of classical mechanics. In particular we show that the states of this Hilbert space do not spread, differently than what happens in quantum mechanics. The role of the phases associated to these classical "wave functions" is analyzed in details. In this framework we also perform the analog of the two-slit experiment and compare it with the quantum case.

D. Mauro

2001-05-23T23:59:59.000Z

70

Integrierte Treibhausgasbewertung der Prozessketten von Erdgas und industriellem Biomethan in Deutschland  

Science Journals Connector (OSTI)

Gemis geht von Verteilnetzverlusten von 0,4?% aus (Öko-Institut 2006); laut Angaben von E.ON-Ruhrgas belaufen sich die Verluste auf 0,5?%. Dieser Wert wurde für die Berechnungen konstant für die Verteilverluste i...

K. Arnold; C. Dienst; S. Lechtenböhmer

2010-04-01T23:59:59.000Z

71

MagLab - Pioneers in Electricity and Magnetism: Klaus von Klitzing  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Klaus von Klitzing (1943-Present) Klaus von Klitzing Klaus von Klitzing is a Nobel laureate who won the prestigious award in 1985 for his discovery of the quantized Hall effect,...

72

Regulation von Apoptose in Ebolavirus-infizierten Zellen.  

E-Print Network [OSTI]

??In der vorliegenden Arbeit wurde die Regulation von Apoptose in Ebolavirus Zaire (ZEBOV)-infizierten Zellen untersucht. Studien an infizierten Affen ergaben, dass mit ZEBOV infizierte Zellen… (more)

Olejnik, Judith

2008-01-01T23:59:59.000Z

73

Effiziente Modellierung und Simulation von Kommunikationsnetzen in Modelica  

Science Journals Connector (OSTI)

Technische Systeme werden zunehmend mit Rechnern und Kommunikationsnetzen ausgestattet. Aus der Kopplung von informationellen und physikalischen Teilsystemen ergibt sich der hybride dynamische Charakter solche...

Liu Liu; Georg Frey

2013-01-01T23:59:59.000Z

74

Ingenieurgeologische Untersuchungen zur Hinterfüllung von Geothermie-Bohrungen mit Erdwärmesonden.  

E-Print Network [OSTI]

??Im Rahmen der Arbeit wurden Untersuchungen an Baustoffen, die zur Verfüllung von Erdwärmesonden-Bohrungen im Bereich der oberflächennahen Geothermie eingesetzt werden, durchgeführt. Die Langzeitbeständigkeit sowie der… (more)

Herrmann, Verena Johanna

2008-01-01T23:59:59.000Z

75

Vom Komponenten- zum Systemlieferanten Perspektiven für Hersteller von Industriemotoren  

Science Journals Connector (OSTI)

Verbunden mit dem Ausbau von regenerativen Energien gewinnt künftig Wasserstoff und daraus erzeugtes Methan an Bedeutung. Power-to-Gas beschreibt ein Verfahren, bei dem überschüssiger Strom...

Thorsten Herdan

2014-07-01T23:59:59.000Z

76

Bestimmung von Kohlenstoff und Wasserstoff in organischen Verbindungen  

Science Journals Connector (OSTI)

Die Oxydationswirksamkeit von 28 Katalysatoren für die Elementar analyse wurde unter Standardbedingungen untersucht. Als Testsubstanz wurde Methan im Gemisch mit Sauerstoff (4 Vol.-%) verwendet und die niedrig...

Ji?í Horá?ek; Ji?í Körbl; Václav Pechanec

1960-01-01T23:59:59.000Z

77

E-Print Network 3.0 - ausbringung von kofermentationsrckstnden...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Planeten wird wrmer. Um eine deutliche Klimaerwrmung von... Atmosphre oder die solare Einstrahlung verringern. Die Bandbreite der Manahmen, die bereits ... Source:...

78

E-Print Network 3.0 - abschaetzung von klimaschutzstrategien...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Mathematics 2 Zusammenfassung This is a tutorial on teaching and programming in MATLAB. Summary: Inhaltsverzeichnis 1 Vektoren und Matrizen 5 1.1 Definition von Vektoren......

79

Investieren in die Technologie von morgen — das Beispiel der Brennstoffzelle  

Science Journals Connector (OSTI)

Die Brennstoffzelle hat das Potenzial, die Strukturen einer ganzen ... Nach Einschätzung von Experten wird der Marktdurchbruch der Brennstoffzelle neben den portablen Anwendungen wie z. B...

Andreas Ballhausen; Roland Diethelm…

2004-01-01T23:59:59.000Z

80

Die unter- und übersynchrone Regelung von Asynchronmotoren durch Mehrphasenkommutatormaschinen  

Science Journals Connector (OSTI)

Die rein untersynchrone Regelung von Asynchronmotoren durch Mehrphasen-Kommutatormaschinen erlaubt, bei zweckentsprechender Ausführung der Maschinen, auch für weit größere Regelbereiche als die üblichen, sehr ...

Dr.-Ing. E. h. A. Heyland

1931-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "von mises stress" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

Darstellung aromatischer Monomere auf Basis von 5-Hydroxymethylfurfural.  

E-Print Network [OSTI]

??Auf Grund der Endlichkeit fossiler Rohstoffe, ist ein Wechsel von der Petrochemie hin zu einer Chemie auf Basis nachwachsender Rohstoffe letztlich unvermeidlich. Eine der Hauptaufgaben… (more)

Neumann, Christopher Noël Dietmar

2010-01-01T23:59:59.000Z

82

Verzeichnis von Veröffentlichungen über Gibberelline (1926–1960)  

Science Journals Connector (OSTI)

Das Verzeichnis enthält Veröffentlichungen über Gibberelline, die seit der Auffindung der Wirkung zellfreier Filtrate von Gibberella-Kulturen durch Kurosawa (1926) bis zum Jahr 1960 erschienen sind. Veröffentlich...

R. Knapp

1962-01-01T23:59:59.000Z

83

Verfahrensentwicklung zur Synthese von 5-Hydroxymethylfurfural und Kohlenhydratcarbonsäuren auf Basis Nachwachsender Rohstoffe.  

E-Print Network [OSTI]

??Zur industriellen Nutzung von Kohlenhydraten wurden zwei prinzipielle Möglichkeiten untersucht: Der Abbau an Funktionalisierung durch Dehydratisierung, wie die Synthese von 5-Hydroxymethylfurfural (HMF) oder Glucosyloxymethylfurfural (GMF),… (more)

Hirth, Joachim

2003-01-01T23:59:59.000Z

84

Engpassmanagement im hoch ausgelasteten Übertragungsnetz von Verbund-Austrian Power Grid  

Science Journals Connector (OSTI)

Aufgrund von regionalen Erzeugungsdefiziten oder -überschüssen in Verbindung mit einer unzureichenden Netzinfrastruktur entstehen Engpässe bzw. unzulässig hohe Belastungen von Betriebsmitteln (z. B. Leitungen und...

A. Dummer Dipl.-Ing.; H. Popelka Dipl.-Ing.

2004-11-01T23:59:59.000Z

85

E-Print Network 3.0 - andrew von eschenbach Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

results for: andrew von eschenbach Page: << < 1 2 3 4 5 > >> 1 Charles Brenner, Norris Cotton Cancer Center, Dartmouth Medical School Summary: Stratton, and NCI Director Andrew von...

86

E-Print Network 3.0 - air erfassung von Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Technologies and Information Sciences 34 Feature Net ein Ansatz zur Modellierung von automobil-spezifischem Domnenwissen und Anforderungen Summary: Erfassung von Anforderungen und...

87

Die energiewirtschaftliche Wettbewerbssituation der elektrischen Raumheizung bei der Versorgung von großen Wohnsiedlungen  

Science Journals Connector (OSTI)

Wie die Ergebnisse von ausgeführten allelektrischen Siedlungen auf Basis von Elektrospeicherheizung nach Pkt. 10.3 und die Untersuchungen über die Gestehungskosten der direkten elektrischen Raumheizung nach Pk...

Dipl.-Ing. Dr. techn. Herbert Moditz

1975-01-01T23:59:59.000Z

88

E-Print Network 3.0 - austritt von ellbogen-saugrohren Sample...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

den Kreisringen austritt und an den Randern der Ringe in die Atmosphare entweicht (Atmosph... ? Fortsetzung nachstes Blatt. Seite 2 von 4 12;4. Ortung von Sturmen auf...

89

E-Print Network 3.0 - auswirkungen von klimaabhaengigen Sample...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Prof. Dr. Hans von Storch (Institut fr Kstenforschung, GKSS Forschungszentrum, Geesthacht und Source: von Storch, Hans - Institute of Coastal Research, GKSS School of...

90

E-Print Network 3.0 - abhaengigkeit von klima Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Prof. Dr. Hans von Storch (Institut fr Kstenforschung, GKSS Forschungszentrum, Geesthacht und Source: von Storch, Hans - Institute of Coastal Research, GKSS School of...

91

E-Print Network 3.0 - auswirkungen kartierung von Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Prof. Dr. Hans von Storch (Institut fr Kstenforschung, GKSS Forschungszentrum, Geesthacht und Source: von Storch, Hans - Institute of Coastal Research, GKSS School of...

92

Die Bedeutung von Schiffsschleusen für den Fischaufstieg — Untersuchungen am Elbwehr bei Geesthacht  

Science Journals Connector (OSTI)

Die Erkenntnis über die Bedeutung von Schiffsschleusen als alternative Fischwanderwege im Bereich von Staustufen ist noch sehr lückenhaft. So beschränken sich die wenigen vorliegenden Untersuchungen meist nur ...

Hans-Jochaim Schubert

1998-01-01T23:59:59.000Z

93

Reduce Stress!  

Broader source: Energy.gov (indexed) [DOE]

Stress! Stress! x Take a break every hour. Do some relaxation or stretching exercises or talk with someone about topics unrelated to work. Give your body and mind a rest. x Massage your hands and forearms several times a day with a vitamin E lotion. The massage will improve circulation and break up adhesions. Since you can't touch a keyboard until the lotion is absorbed, it also enforces a good break. x Massage the muscles in your neck working your way down from the skull to the shoulders, applying more force to the larger muscles as you go down. x Periodically evaluate your environment for ways to reduce stress. Try to keep your desk uncluttered so you can always find things. Make sure programs are set up correctly on the computer, and see if you can use a macro program to reduce

94

ON CARDINAL INVARIANTS AND GENERATORS FOR VON NEUMANN ALGEBRAS  

E-Print Network [OSTI]

ON CARDINAL INVARIANTS AND GENERATORS FOR VON NEUMANN ALGEBRAS DAVID SHERMAN Abstract. We the decomposability number, dec(M), and the minimal cardinal- ity of a generating set, gen(M). Applications include the equivalence of the well-known generator problem, "Is every separably-acting von Neumann algebra singly-generated

Sherman, David

95

Von Neumann Betti numbers and Novikov type inequalities  

E-Print Network [OSTI]

It is shown that the Novikov inequalities for critical points of closed 1-forms hold with the von Neumann Betti numbers replacing the Novikov numbers. As a corollary we obtain a vanishing theorem for $L^2$ cohomology, generalizing a theorem of W. Lueck. We also prove that von Neumann Betti numbers coincide with the Novikov numbers for free abelian coverings.

Michael Farber

1998-10-18T23:59:59.000Z

96

On Koopman-von Neumann Waves II  

E-Print Network [OSTI]

In this paper we continue the study, started in [1], of the operatorial formulation of classical mechanics given by Koopman and von Neumann (KvN) in the Thirties. In particular we show that the introduction of the KvN Hilbert space of complex and square integrable "wave functions" requires an enlargement of the set of the observables of ordinary classical mechanics. The possible role and the meaning of these extra observables is briefly indicated in this work. We also analyze the similarities and differences between non selective measurements and two-slit experiments in classical and quantum mechanics.

E. Gozzi; D. Mauro

2003-06-04T23:59:59.000Z

97

Approximate von Neumann entropy for directed graphs  

Science Journals Connector (OSTI)

In this paper, we develop an entropy measure for assessing the structural complexity of directed graphs. Although there are many existing alternative measures for quantifying the structural properties of undirected graphs, there are relatively few corresponding measures for directed graphs. To fill this gap in the literature, we explore an alternative technique that is applicable to directed graphs. We commence by using Chung's generalization of the Laplacian of a directed graph to extend the computation of von Neumann entropy from undirected to directed graphs. We provide a simplified form of the entropy which can be expressed in terms of simple node in-degree and out-degree statistics. Moreover, we find approximate forms of the von Neumann entropy that apply to both weakly and strongly directed graphs, and that can be used to characterize network structure. We illustrate the usefulness of these simplified entropy forms defined in this paper on both artificial and real-world data sets, including structures from protein databases and high energy physics theory citation networks.

Cheng Ye; Richard C. Wilson; César H. Comin; Luciano da F. Costa; Edwin R. Hancock

2014-05-12T23:59:59.000Z

98

Quantitative gas-chromatographische Simultanbestimmung von Wasserstoff, Methan, Äthan und Äthylen  

Science Journals Connector (OSTI)

Die quantitative gas-chromatographische Bestimmung von Wasserstoff, Methan, Äthan und Äthylen führt bei Verwendung einer...

H. W. Dürbeck

99

Niederdruck-Überschallexpansionen. Eine studie zur formation von kalten wasserstoff und deuteriumatomstrahlen für polarisierte gastargets  

E-Print Network [OSTI]

Niederdruck-Überschallexpansionen. Eine studie zur formation von kalten wasserstoff und deuteriumatomstrahlen für polarisierte gastargets

Nass, A

2002-01-01T23:59:59.000Z

100

Strahlenchemie von alkoholen—VII die methanbildung bei der UV-photolyse von deuterierten isopropanolen  

Science Journals Connector (OSTI)

Zusammenfassung Fünf verschiede deuterierte Isopropanole wurden mit Licht der Wellenlänge ? = 185 nm bestrahlt und die Isotopenverteilung des gebildeten Methans gemessen. Im Gegensatz zur ?-Radiolyse von Isopropanol [C. von Sonntag und W. Brüning, Int. J. radiat. Phys. Chem. 1969, 1, 25], bei der das Methan zu etwa 95 Prozent über Methylradikale als Vorläufer entsteht, beträgt dieser Anteil bei der UV-Photolyse nur ca. 8 Prozent. Der Hauptanteil wird molekular abgespalten: 66 Prozent unter Abspaltung einer Methylgruppe zusammen mit dem Wasserstoff der OH-Gruppe, 26 Prozent unter Abspaltung einer Methylgruppe und einem Wasserstoff der anderen Methylgruppe. Im ersten Fall entsteht neben dem Methan Acetaldehyd, im zweiten Fall die Enolform des Acetaldehyds. The photolysis of several deuterated isopropanols has been studied with light of the wavelength ? = 185 nm. The isotopic composition of the methane formed has been measured. In contrast to the ?-radiolysis of isopropanol [C. von Sonntag and W. Brüning, Int. J. radiat. Phys. Chem. 1969, 1, 25] where methylradicals are the precursors of 95 per cent of the methane formed, methyl radicals yield only ca. 8 per cent of the methane in UV-photolysis (? = 185 nm). The major part is formed in a molecular fragmentation process: 66 per cent by a simultaneous elimination of a methyl group and the OH-hydrogen and 26 per cent by the elimination of one methyl group and a hydrogen of the other methyl group. In the first case acetaldehyde, in the second case the enol-form of acetaldehyde is the other product.

C. von Sonntag

1969-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "von mises stress" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
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We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

Förderung von Deutsch als Zweitsprache durch generatives Schreiben auf Basis einer Sprachstandsdiagnose nach USB DaZ in Ö im morphologisch-syntaktischen Bereich.  

E-Print Network [OSTI]

??Diese Masterarbeit beschäftigt sich mit dem Zusammenspiel von Sprachstandsdiagnose und Sprachförderung. Praktisch umgesetzt wurde dies in der Erstellung von Übungen, die der Förderung von Deutsch… (more)

Scharinger, Ursula

2013-01-01T23:59:59.000Z

102

The Amalgamated Free Product of Hyperfinite von Neumann Algebras  

E-Print Network [OSTI]

of a hyperfinite von Neumann algebra and a finite number of interpolated free group factors. We then show that this class is closed under this type of amalgamated free product. After that we allow amalgamation over possibly infinite dimensional...

Redelmeier, Daniel

2012-07-16T23:59:59.000Z

103

C.F.von Weizsäcker-High Energy Physics  

ScienceCinema (OSTI)

C.F.von Weizsäcker (1912-2007),physicien,philosophe et "chercheur de paix", prit la décision de faire des études de physique sous l'influence de W.Heisenberg qu'il rencontra en 1927.

None

2011-04-25T23:59:59.000Z

104

Die Bestimmung von Kupfer- und Nickelspuren in Gallium  

Science Journals Connector (OSTI)

Nickel- und Kupferkontaminierungen in Gallium im ppm-Bereich und darunter stören empfindlich bei der Verwendung in der Halbleiterphysik. Der Chloridkomplex des Galliums in 6-n HC1 wird von einem stark basische...

H. Titze

1977-01-01T23:59:59.000Z

105

Zwischen Skylla und Charybdis: Motive von Maß und Mitte  

Science Journals Connector (OSTI)

Das Bild der maßvollen Mitte geht begründungslogisch der Rede von den Extremen voraus. Mit Mitte wird bis heute Ebenmaß, Wohlgestalt und Harmonie assoziiert, und das nicht nur politisch wie im Hufe...

Tobias Prüwer

2011-01-01T23:59:59.000Z

106

Experimentelle Untersuchung über die Koeffizienten der inneren Reibung von Stickoxyd und Propan und deren Mischungen mit Wasserstoff  

Science Journals Connector (OSTI)

Es wird also die innere Reibung von Stickoxyd nachgeprüft, die Messung von Propan neu ausgeführt. Ferner wird die innere Reibung von Mischungen NO-H2 und C3H8-H2 gemessen und gezeigt, inwieweit Übereinstimmung mi...

Alfons Klemenc; Walter Remi

1923-01-01T23:59:59.000Z

107

Introduction to foundations of probability and randomness (for students in physics), Lectures given at the Institute of Quantum Optics and Quantum Information, Austrian Academy of Science, Lecture-1: Kolmogorov and von Mises  

E-Print Network [OSTI]

The education system for students in physics suffers (worldwide) from the absence of a deep course in probability and randomness. This is the real problem for students interested in quantum information theory, quantum optics, and quantum foundations. Here the primitive treatment of probability and randomness may lead to deep misunderstandings of theory and wrong interpretations of experimental results. Since during my visits (in 2013 and 2014) to IQOQI a number of students (experimenters!) asked me permanently about foundational problems of probability and randomness, especially inter-relation between classical and quantum structures, this year I gave two lectures on these problems. Surprisingly the interest of experiment-oriented students to mathematical peculiarities was very high. This (as well as permanent reminding of prof. Zeilinger) motivated me to write a text based on these lectures which were originally presented in the traditional black-board form. I hope that this might be useful for students from...

Khrennikov, Andrei

2014-01-01T23:59:59.000Z

108

Topics in Koopman-von Neumann Theory  

E-Print Network [OSTI]

In this thesis we study several features of the operatorial approach to classical mechanics pionereed by Koopman and von Neumann (KvN) in the Thirties. In particular in the first part we study the role of the phases of the KvN states. We analyze, within the KvN theory, the two-slit experiment and the Aharonov-Bohm effect and we make a comparison between the classical and the quantum case. In the second part of the thesis we study the extension of the KvN formalism to the space of forms and Jacobi fields. We first show that all the standard Cartan calculus on symplectic spaces can be performed via Grassmann variables or via suitable combinations of Pauli matrices. Second we study the extended Hilbert space of KvN which now includes forms and prove that it is impossible to have at the same time a positive definite scalar product and a unitary evolution. Clear physical reasons for this phenomenon are exhibited. We conclude the thesis with some work in progress on the issue of quantization.

D. Mauro

2003-01-30T23:59:59.000Z

109

E-Print Network 3.0 - ableitung von abwaessern Sample Search...  

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von R in die Dichten auf R heit Hellinger-dieren- zierbar in t mit Ableitung a, wenn f12 s - f... mit derselben Ableitung. 44. Fr jedes aus einer oenen Teilmenge von R sei p...

110

Zwischen Skylla und Charybdis – Psychodramatische Reflexionen zur Kompetenzentwicklung am Beispiel von Hochschullehrenden  

Science Journals Connector (OSTI)

Praxiserfahrungen sind es hier also, die die Befähigung hervorbringen. Ein solches Verständnis von Lernen ist tief eingelassen in ein überliefertes Verständnis von ‚Praxis‘, das der Sprache der jonischen Seefahrt...

Prof. Dr. Dr. h.c. Johannes Wildt

2011-04-01T23:59:59.000Z

111

E-Print Network 3.0 - analyse von ribo- Sample Search Results  

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of Science Collection: Chemistry 69 Unsere Motivation Trotz intensiver Bemhungen der Automobil- Summary: Integrationsprozess, die Analyse von Echtzeit- und...

112

E-Print Network 3.0 - analyse von ladungsschichtung Sample Search...  

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and Information Sciences 27 Unsere Motivation Trotz intensiver Bemhungen der Automobil- Summary: Integrationsprozess, die Analyse von Echtzeit- und...

113

E-Print Network 3.0 - auer-haus-verpflegung analyse von Sample...  

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and Information Sciences 27 Unsere Motivation Trotz intensiver Bemhungen der Automobil- Summary: Integrationsprozess, die Analyse von Echtzeit- und...

114

E-Print Network 3.0 - analyse von handlungsstrukturen Sample...  

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and Information Sciences 33 Unsere Motivation Trotz intensiver Bemhungen der Automobil- Summary: Integrationsprozess, die Analyse von Echtzeit- und...

115

E-Print Network 3.0 - analyse von grnden Sample Search Results  

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and Information Sciences 39 Unsere Motivation Trotz intensiver Bemhungen der Automobil- Summary: Integrationsprozess, die Analyse von Echtzeit- und...

116

E-Print Network 3.0 - analyse von p53 Sample Search Results  

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and Information Sciences 56 Unsere Motivation Trotz intensiver Bemhungen der Automobil- Summary: Integrationsprozess, die Analyse von Echtzeit- und...

117

(as) Verbessert eine Infusion von Knochenmarkzellen in die Kranzgefe die Herzfunktion nach einem Infarkt? Wenn ja,  

E-Print Network [OSTI]

(as) Verbessert eine Infusion von Knochenmarkzellen in die Kranzgefä�e die Herzfunktion nach einem

Manstein, Dietmar J.

118

E-Print Network 3.0 - abfallhaltung von natuerlicher Sample Search...  

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Universitt Hamburg Summary: Prof. Dr. Hans von Storch GKSS-Forschungszentrum Geesthacht Max-Planck-Strae 21502 Geesthacht Prof. Dr... - - - - - - - - - - - - - - - - - -...

119

Sorption von Wasserstoff an kondensierten Titanschichten bei niedrigen Drücken  

Science Journals Connector (OSTI)

In der vorliegenden Arbeit wurden mittels der massenspektrometrischen Methode die Gleichgewichts-Drücke von Wasserstoff über kondensierten Titanschichten bei Drücken von 10-10 bis 10?7 Torr und bei Temperaturen von 77,2, 113,4 und 178°K untersucht Equilibrium pressures of hydrogen over evaporated Ti-films were investigated with mass-spectrometer in the pressure range of 10?10—10?7 torr, and at temperatures of 77.2°K, 113.4°K and 178°K. Cet ouvrage décrit les recherches qui ont été faites à l'aide du spectromètre de masse concernant les pressions d'équilibre de l'hydrogène régnant à des pressions de 10?10 à 10?7 Torr et des températures de 77,2°K; 113,4°K et 178°K au-dessus des couches de titane condensées.

G F Iwanovski; A T Schirjaev

1967-01-01T23:59:59.000Z

120

Dirichlet problems for stationary von Neumann-Landau wave equations  

E-Print Network [OSTI]

It is known that von Neumann-Landau wave equation can present a mathematical formalism of motion of quantum mechanics, that is an extension of Schr\\"{o}dinger's wave equation. In this paper, we concern with the Dirichlet problem of the stationary von Neumann-Landau wave equation: {(- \\triangle_x + \\triangle_y) \\Phi (x, y) = 0, x, y \\in \\Omega, \\Phi|_{\\partial \\Omega \\times \\partial \\Omega} = f, where $\\Omega$ is a bounded domain in $\\mathbf{R}^n.$ By introducing anti-inner product spaces, we show the existence and uniqueness of the generalized solution for the above Dirichlet problem by functional-analytic methods.

Zeqian Chen

2007-05-25T23:59:59.000Z

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121

Strahlenchemie von alkoholen—IX : Die UV-photolyse (? = 185 nm) von methanol in flüssiger phase  

Science Journals Connector (OSTI)

Zusammenfassung Bei der Photolyse (? = 185 nm) von flüssigem Methanol entstehen Wasserstoff, Glykol, Formaldehyd und Methan sowie Spuren Äthan. Die Quantenausbeuten (bezogen auf ?(H2) = 0·4 des Äthanol -Aktinometers (5 mol/1 in Wasser)) betragen 0·83, 0·78, 0·058, 0·05 bzw. 0·002. Die Isotopenverteilung des bei der Photolyse von CH3OD entstehenden Wasserstoffs (85% HD) zeigt, dass in der flüssigen Phase, ähnlich wie in der Gasphase,2 die Spaltung der O?H-Bindung (1) der wichtigste Zerfallsprozess ist. CH3OH + hv (? = 185 nm) ? CH3O• + H• (1) In Mischungen mit Wasser, in denen das Wasser fast keinen Anteil der Strahlung absorbiert, werden die Quantenausbeuten der Produkte Wasserstoff, Glykol, Methan und Äthan stark erniedrigt, während die Formaldehydausbeute konstant bleibt. In 1 molarer Lösung beträgt ?(H2) = 0·42, ?(Glykol) = 0·32, ?(CH4) = 6·10?4. Äthan ist nicht mehr nachweisbar. The UV photolysis (? = 185 nm) of liquid methanol yields hydrogen, glycol, formaldehyde, methane and traces of ethane in quantum yields of 0·83, 0·78, 0·058, 0·05 and 0·002 resp. (related to ?(H2) = 0·4 of the ethanol-actinometer (5 mole/1 in water)). The isotopic distribution of the hydrogen (85% HD) formed in the photolysis of CH3OD shows, that as in the gasphase2 the scission of the O?H-bond (1) is the major process. CH3OH + hv (? = 185 nm) ? CH3O• + H• (1) In methanoi-water mixtures (nearly all the light of the wavelength ? = 185 nm is absorbed by methanol) the quantum yields of hydrogen, glycol, methane and ethane are greatly reduced, while the formaldehyde yield remains unaffected. In 1 molar solution ?(H2) = 0·42, ?(glycol) = 0·32 and ?(CH4) = 6 x 10?4 is obtained. Ethane cannot be detected.

C. Von Sonntag

1969-01-01T23:59:59.000Z

122

Ab Frhjahr 2009 startet hier der Bau von sechs Offshore-  

E-Print Network [OSTI]

Ab Frühjahr 2009 startet hier der Bau von sechs Offshore- Windenergieanlagen (OWEA) vom Typ Ent- wicklung der Offshore-Wind- energie besondere Bedeutung zu. Derzeit laufen in der Aus Vorhaben durchgeführt. Acht Einleitung Ziel der Bundesregierung ist es, bis zum Jahr 2030 Offshore

Vollmer, Heribert

123

Bestimmung des ep{Wirkungsquerschnittes von Beauty-Quarks  

E-Print Network [OSTI]

Bestimmung des ep{Wirkungsquerschnittes von Beauty-Quarks durch ihren semileptonischen Zerfall in Myonen mit dem H1-Detektor bei HERA Determination of the ep Cross Section for Beauty Quarks via werden die sichtbaren ep-Wirkungsquerschnitte fur schwere Quarks in dem kinematischen Bereich Q2

124

John von Neumann Institute for Computing Monte Carlo Protein Folding  

E-Print Network [OSTI]

John von Neumann Institute for Computing Monte Carlo Protein Folding: Simulations of Met://www.fz-juelich.de/nic-series/volume20 #12;#12;Monte Carlo Protein Folding: Simulations of Met-Enkephalin with Solvent-Accessible Area difficulties in applying Monte Carlo methods to protein folding. The solvent-accessible area method, a popular

Hsu, Hsiao-Ping

125

Die Verbrennung an einer Düse, eine sehr wirksame Oxydationsmethode für die Bestimmung von Kohlenstoff, Wasserstoff, Fluor, Chlor, Brom, Jod, Schwefel und Phosphor in organischen Verbindungen  

Science Journals Connector (OSTI)

Die Grundlagen für die Verbrennung an einer Düse wurden geklärt. Der Umsatz an der Düse hängt von der Temperatur der Düse, von der Verdünnung der Probedämpfe mit Spülgas, von der Verbrennungswärme der Probe so...

Gerald Kainz; Franz Scheidl

1964-01-01T23:59:59.000Z

126

E-Print Network 3.0 - ausfuhr von mineraloel Sample Search Results  

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Summary: exemplari- schen Losung von MU-Problemen am Beispiel der Sprachpaare Deutsch-Englisch und Deutsch... -Franzosisch zu entwickeln. Die zentralen Themen der...

127

Heizsysteme im Quervergleich — Aspekte zum Energieaufwand bei der Raumkonditionierung von Wohngebäuden  

Science Journals Connector (OSTI)

Zur Beurteilung der Energiedienstleistung Beheizen von Wohngebäuden sind Gesamtbilanzen dienlich, die sowohl die Gebäu-deerstellung, die Entsorgung, vor allem aber den Betriebsenergieverbrauch berücksichtigen....

B. Geiger

1991-01-01T23:59:59.000Z

128

E-Print Network 3.0 - auslese von delaylinedetektoren Sample...  

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Co-Investigator von eROSITA, Projektmanager des Nieder- energiedetektors auf Simbol Source: Astrophysikalisches Institut Potsdam Collection: Physics 25 MAGAZINder...

129

E-Print Network 3.0 - aenderung von anlagenteilen Sample Search...  

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von anlagenteilen Page: << < 1 2 3 4 5 > >> 1 A. WORMANN. 2014 Die Neutralisations wrme starker Suren und Basen und ihre Aenderung mit Temperatur und Konzentration (Chaleur de...

130

E-Print Network 3.0 - anaerobe ammoniakoxidation von Sample Search...  

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Otto-Von-Guericke-UniVersitat Magdeburg, UniVersitatsplatz 2, D-39106 Magdeburg, Germany... acid (MA) under aerobic and anaerobic conditions was investigated. The Ce(IV)...

131

E-Print Network 3.0 - alexander von humboldt Sample Search Results  

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Information Summary: initiatives I. Programme Every year, the Alexander von Humboldt Foundation grants up to three Humboldt Alumni... . The award is designed to promote initiatives...

132

Probennahme und Quantifizierung von LHKW, Ethen und Methan in Grundwasser  

Science Journals Connector (OSTI)

Der Einsatz aktiver (Pumpprobennahme, Schöpfprobennahme) und passiver (Diffusionsprobennahme) Probennahmetechniken zur Gehaltsbestimmung von LHKW sowie Ethen und Methan in Grundwasser wird aus ordnungsbehördli...

Ute Dorgerloh; Hubert Theissen; Roland Becker; Dipl.-Geol. Sabine Hilbert…

2010-12-01T23:59:59.000Z

133

E-Print Network 3.0 - absorption von wasserstoff Sample Search...  

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Hrsaal B, Fachbereich Chemie, Martin-Luther-King-Platz 6 Die RNA-Welt Theorie - von... Wasserstoff waren vor al- lem Methan, Kohlenmonoxid aber auch Formaldehyd und...

134

Optimierung von Redoxpolymeren für Biosensoren und Biobrennstoffzellen und ihre Stabilisierung auf Elektrodenoberflächen.  

E-Print Network [OSTI]

??Im Rahmen dieser Arbeit wurde eine neue, optimierte Synthesestrategie für die modlulare Herstellung von Redoxpolymeren auf Basis einer Epoxidöffnungsreaktion entwickelt. Es wurden Methoden zur Stabilisierung… (more)

Pöller, Sascha

2013-01-01T23:59:59.000Z

135

Das Abschätzen der Wasserversorgung von Waldbeständen auf durchlässigen Standorten ohne Grund- und Hangzugwasser  

Science Journals Connector (OSTI)

Zur Beurteilung der Wasserversorgung von Waldbeständen leicht durchlässiger Böden wird ein halbquantitatives Verfahren vorgeschlagen. Es ergibt einen Schätzwert für die Zahl der Tage mit nicht ausreichender Wa...

W. Laatsch

1969-12-01T23:59:59.000Z

136

E-Print Network 3.0 - aspects bildung von Sample Search Results  

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Zukunft nicht in der zunehmenden Abhngigkeit von staatlichen Vorgaben sehen will... private Investition in Wissenschaft und Bildung ist Kapital fr die Zukunft unseres...

137

E-Print Network 3.0 - abhaengigkeit von der Sample Search Results  

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von ,stereo vision als Basis zur ... Source: Folgheraiter, Michele - Robotics Innovation Center, DFKI Bremen Collection: Engineering 5 Die Ziege auf der kreisfoermigen...

138

E-Print Network 3.0 - angiographischen quantifizierung von Sample...  

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hat. Unterstutzt wurde er bei den numerischen Untersuchungen von Dr. Romer (TP C1 Source: Chemnitz, Technische Universitt - Fakultaet fuer Mathematik, Numerische...

139

E-Print Network 3.0 - aus sicht von Sample Search Results  

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D3.201 Geometrische Mechanik und Summary: Variationsprinzipien beruht, basiert der Hamilton-Formalismus auf der Beobachtung von Energien im System. In dieser... Veranstaltung...

140

E-Print Network 3.0 - antitumorale wirkung von Sample Search...  

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Storch ist Direktor des Instituts fr Kstenforschung am GKSS-Forschungszentrum in Geesthacht... . Bitte erlutern Sie warum. Hans von Storch: Ich halte das IPCC fr eine sehr...

Note: This page contains sample records for the topic "von mises stress" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

E-Print Network 3.0 - applications wirkungen von Sample Search...  

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Storch ist Direktor des Instituts fr Kstenforschung am GKSS-Forschungszentrum in Geesthacht... . Bitte erlutern Sie warum. Hans von Storch: Ich halte das IPCC fr eine sehr...

142

E-Print Network 3.0 - acquired von willebrand Sample Search Results  

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and Hans von Storch, Institute for Coastal Research, GKSS Research Centre Geesthacht, Germany The Institute... .huenicke@gkss.de) at GKSS. References Bindoff, N.L.,...

143

E-Print Network 3.0 - activates von willebrand Sample Search...  

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and Hans von Storch, Institute for Coastal Research, GKSS Research Centre Geesthacht, Germany The Institute... .huenicke@gkss.de) at GKSS. References Bindoff, N.L.,...

144

Virtuelles Eigentum – Der Dualismus von Rechten am Werk und am Werkstück in der digitalen Welt  

Science Journals Connector (OSTI)

Die Entwicklung und zunehmende wirtschaftliche Bedeutung von virtuellen Welten und Onlinerollenspielen, in denen virtuelle Gegenstände gegen reales Entgelt gehandelt werden, wirft die Frage ihrer rechtlichen E...

Matthias Berberich

2010-01-01T23:59:59.000Z

145

E-Print Network 3.0 - application konditionierung von Sample...  

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konditionierung von Page: << < 1 2 3 4 5 > >> 1 Influence of moisture content on EPR parameters of copper in impregnated wood Summary: gnierung mit drei verschiedenen...

146

Die Beeinflussung der Zusammenarbeit von deutschen und niederländischen Studenten durch kulturelle Unterschiede.  

E-Print Network [OSTI]

??Diese Arbeit hat die Frage welche kulturelle Unterschiede das Zusammenarbeiten zwischen deutschen und niederländischen Studenten beeinflussen, beantwortet. Anhand von Interviews mit deutschen Studenten, die in… (more)

Rademakers, A.M.

2013-01-01T23:59:59.000Z

147

E-Print Network 3.0 - atomare vielteilchendynamik von Sample...  

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Sig-Algebrag 12; Atomare Spezifikationen Initiale Spezifikationen... ffl Folien + Tafel ffl Kopien von Folien, Notizen (Tafel) und speziellen Papieren werden zur Verf......

148

E-Print Network 3.0 - auslegung von kernkraftwerken Sample Search...  

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wir nun von ... Source: Lygeros, John - Nondeterministic and Stochastic Hybrid Systems, ETH Zurich Collection: Engineering 4 A. E. K. Ris Rktt-M-I lei? Title and authors)...

149

DGPF Tagungsband 18 / 2009 Genauigkeitsanalyse der 3D-Trajektorie von Mini-UAVs  

E-Print Network [OSTI]

DGPF Tagungsband 18 / 2009 407 Genauigkeitsanalyse der 3D-Trajektorie von Mini-UAVs HENRI EISENBEISS 1 , WERNER STEMPFHUBER 1 & MICHAEL KOLB 2 Zusammenfassung: Nach einer Einführung über UAVs und einer Beschreibung von ver- schiedenen UAV-Systemen wird im vorliegenden Artikel eine Methode für die

150

Das vorliegende Buch ist das dritte in einer Reihe von Bnden, die der organische Che-  

E-Print Network [OSTI]

seit etwa zehn Jahren schrieb er eine Reihe von Aufsätzen in der Zeitschrift Chemie in unserer Zeit über die Chemie von Lebensmitteln, über Gifte und Arzneimittel, über den Zitronen- säurezyklus als

151

Remote Tomography Via von Neumann-Arthurs-Kelly Interaction  

E-Print Network [OSTI]

Teleportation usually involves entangled particles 1,2 shared by Alice and Bob, Bell-state measurement on particle 1 and system particle by Alice, classical communication to Bob, and unitary transformation by Bob on particle 2. We propose a novel method: interaction-based remote tomography. Alice arranges an entanglement generating von Neumann-Arthurs-Kelly interaction between the system and two apparatus particles, and then teleports the latter to Bob. Bob reconstructs the unknown initial state of the system not received by him by quadrature measurements on the apparatus particles .

S. M. Roy; Abhinav Deshpande; Nitica Sakharwade

2013-08-23T23:59:59.000Z

152

Stress Test | Open Energy Information  

Open Energy Info (EERE)

Stress Test Stress Test Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Stress Test Details Activities (1) Areas (1) Regions (0) NEPA(0) Exploration Technique Information Exploration Group: Downhole Techniques Exploration Sub Group: Well Testing Techniques Parent Exploration Technique: Well Testing Techniques Information Provided by Technique Lithology: Stratigraphic/Structural: Fracture distribution and ambient tectonic stresses Hydrological: Fluid flow direction Thermal: Dictionary.png Stress Test: A geologic stress analysis based on images of a borehole wall and hydraulic fracturing tests to characterize fracture orientations and stress magnitudes in order to identify stress planes and zones of potential permeability. Other definitions:Wikipedia Reegle

153

Adsorption und anodische oxydation von wasserstoff an wolframcarbid  

Science Journals Connector (OSTI)

Zusammenfassung Es wird die anodische Oxydation von Wasserstoff an glatten Wolframcarbidelektroden beschrieben. Weiter wird die Austauschstromdichte bestimmt und das Adsorptionsverhalten des Wasserstoffs an Wolframcarbid ermittelt. Im Vergleich zu Wasserstoff an Platin erfolgt die Adsorption an Wolframcarbid langsamer und die Austauschstromdichte ist geringer. Aus den kinetischen Messungen ergibt sich die Reaktion \\{H2ad\\} ? 2Had als geschwindigkeitsbestimmender Schritt bei der Adsorption des Wasserstoffs an Wolframcarbid. The anodic oxidation of hydrogen at smooth tungsten carbine electrodes is described. The exchange cd and the adsorption behaviour of hydrogen at tungsten carbide is determined. As compared to hydrogen at platinum the adsorption at tungsten carbide is slower and the exchange cd is smaller. From kinetic measurements it follows that the reaction \\{H2ad\\} ? 2Had is the rate-determining step for the adsorption of hydrogen at tungsten carbide.

H. Böhm

1970-01-01T23:59:59.000Z

154

Unsicherheitsanalysen zur Parametrisierung von Prozessen der Biosphre und Hydrosphre in atmosphrischen Modellen  

E-Print Network [OSTI]

Zustandsvariablen zu berechnen und Fehlerbalken anzugeben. Unsicherheiten in den Strahlungs-, Wärme- und. Wegen der vielen verschiedenen empirischen Parameter, von denen der Fluss latenter Wärme abhängt

Moelders, Nicole

155

Untersuchungen zur N2-Binding bei der Verrottung von Waldgräserwurzeln unter Mikroaeroben Bedingungen  

Science Journals Connector (OSTI)

Es sollte geprüft werden, ob verrottende Wurzeln von Waldgräsern in einem mikroaeroben Milieu den N-Bindern wesentliche Mengen ausnutzbarer C-Quelle zur Verfügung stellen, so daß N-Gewinne mit dem Kjeldahlverf...

H. J. Dubber

1965-10-01T23:59:59.000Z

156

bungsaufgaben zum Freitag 14.6 1) Rntgen-Bragg Reflexion von Silizium  

E-Print Network [OSTI]

Sie die Rydberg Formel 3.2 aus 3.1 her! d) Die ersten Linien der Paschen-Serie im Wasserstoff-Konstanten von Wasserstoff RH nm. Blatt09 #12;

Wünsche, Hans-Jürgen "Ede"

157

E-Print Network 3.0 - akzeptanz von rentenreformen Sample Search...  

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OG) Summary: , Berlin N.N. 08.11.2011 Prof. Dr. Hans von Storch Helmholtz-Zentrum Geesthacht Institut fr... -Luther-Universitt Halle - Wittenberg Institut fr Psychologie...

158

Zur gesundheitlichen Situation von Familien mit nichtdeutscher Staatsangehörigkeit in der Bundesrepublik  

Science Journals Connector (OSTI)

Migration und Gesundheit bedeutet zunächst und allgemein, dass Beobachtungen und Erfahrungen im Kontext von Gesundheit, Krankheit und Versorgung bei Migranten Thema dieser Arbeit sind. Dabei wird auf der einen...

Johannes Korporal; Bärbel Dangel-Vogelsang

2000-01-01T23:59:59.000Z

159

E-Print Network 3.0 - auslegung von hybrid- Sample Search Results  

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hybrid- Search Powered by Explorit Topic List Advanced Search Sample search results for: auslegung von hybrid- Page: << < 1 2 3 4 5 > >> 1 Termin Aktion Anfang April Versand der...

160

Die aquotisierung von [Cren3]3+ in wässriger perchlorsaurer Lösung  

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Die in wässriger perchlorsaurer Lösung (pH = 1) zum cis-[Cr en2(H2O2)3+ verlaufende Aquotisierung von [Cren3]3+ wird spektrophotometrisch, polarimetrisch und refraktometrisch untersucht. Die Reaktion läuft als Zweistufenreaktion mit zwei Schritten erster Ordnung ab, von denen der erste ca. 25 mal schneller ist als der zweite, der nach kurzer Anlaufzeit praktisch geschwindigkeitsbestimmend wird. Die kinetischen Daten für den zweiten Schritt werden angegeben. Es wird ein Reaktionsmechanismus für die Aquotisierung diskutiert.

Hans L. Schläfer; Ottmar Kling

1958-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "von mises stress" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

Thermal stresses in laminated beams  

E-Print Network [OSTI]

24. Normal Stress Distribution for a Cantilever Laminated Beam, T-Z sinzx/L --------------- 58 m. i 25. Axial Stress Distribution for a Cantilever Laminated Bearq, T-T (2z/8+1) 2 mi 27. Normal Stress Distribution for ("/L) ? ---- 6 O 2 a... 80 100 Stress o (psi) xz. i Fig. 14. Normal Stress Distribution for a Simply-Supported Laminated Beam, T=z (2z/H+1) (x/L) 2 2 m. 1 6 4 x Classical Solution o Present Solution Load: Sinusoidal I F 0 100 200 300 400 Stress c (ps&) XX. 1 500...

Marcano, Victor Manuel

2012-06-07T23:59:59.000Z

162

Ozone and ethylene stress  

Science Journals Connector (OSTI)

... SIRá"In a recent News and Views article1 "Adding ethylene to injury", M. Unsworth discussed the results of Mehlhorn and Wellburn2, who reported ... M. Unsworth discussed the results of Mehlhorn and Wellburn2, who reported that both endogenous ethylene (a stress-hormone) and exogenous ozone are cooperating prerequisites for injury to pea plants ...

E. F. ELSTNER

1987-08-06T23:59:59.000Z

163

Theoria 49: 107-114, 2004. Apuntes sobre la vida y la obra de Georg Henrik von Wright*  

E-Print Network [OSTI]

Theoria 49: 107-114, 2004. Apuntes sobre la vida y la obra de Georg Henrik von Wright* (Georg Henrik von Wright. In Memoriam) Daniel GONZÁLEZ LAGIER BIBLID [0495-4548 (2004) 19: 49; pp. 107-114] I Georg Henrik von Wright nació en Helsinki el 14 de Junio de 1916 y falleció en esa misma ciudad el 16 de

Machery, Edouard

164

Health Psychology Chapter Six: Stress  

E-Print Network [OSTI]

- individual X environment 2) Some Definitions: a) Generic- demands exceed capacity - engineering origins b stress responses, and (e) physical and mental health outcomes #12;Person-Environment Fit Sufficient by a nonspecific response. #12;What is Stress? Stress is a negative emotional experience accompanied

Meagher, Mary

165

Health Psychology Chapter Six: Stress  

E-Print Network [OSTI]

environment 2) Some Definitions: a) Generic- demands exceed capacity - engineering origins b) Biological stress responses, and (e) physical and mental health outcomes #12;Person-Environment Fit ! Sufficient by a nonspecific response. #12;What is Stress? ! Stress is a negative emotional experience accompanied

Meagher, Mary

166

Transformation von Multiphysics-Modellen in einen FPGA-Entwurf für den echtzeitfähigen HiL-Test eingebetteter Systeme.  

E-Print Network [OSTI]

??Mit der vorliegenden Arbeit wird eine durchgängige Werkzeugkette von der Modellbildung physikalischer Simulationen bis zur Entwurfsautomatisierung für FPGA-basierte Echtzeitsimulationen etabliert. Modelica wurde als vielseitige, intuitive… (more)

Köllner, Christian

2013-01-01T23:59:59.000Z

167

Über die Wirksamkeit von Bariumchromat als Verbrennungskatalysator bei der Kohlenstoff- und Wasserstoff-Mikrobestimmung in organischen Verbindungen  

Science Journals Connector (OSTI)

Die Oxydationsleistung von Bariumchromat, Kobalt(II,III)-oxid, Zersetzungsprodukt des Silberpermanganats und Kupferoxid als Verbrennungskatalysatoren bei der CH-Bestimmung in organischen Verbindungen wurde unt...

A. Campiglio

1976-01-01T23:59:59.000Z

168

Das Mischungsverhalten von Nb3Sn mit Mo3Si, Mo3Ge und Nb3Ge  

Science Journals Connector (OSTI)

Mittels homogenisierter Sinter-und Schmelzproben wird die Bildung von lückenlosen Mischreihen zwischen Nb3Sn mit Mo3Si, Mo3Ge und Nb3Ge nachgewiesen.

H. Holleck; F. Benesovsky; H. Nowotny

1962-01-01T23:59:59.000Z

169

Contact stress sensor  

DOE Patents [OSTI]

A method for producing a contact stress sensor that includes one or more MEMS fabricated sensor elements, where each sensor element of includes a thin non-recessed portion, a recessed portion and a pressure sensitive element adjacent to the recessed portion. An electric circuit is connected to the pressure sensitive element. The circuit includes a pressure signal circuit element configured to provide a signal upon movement of the pressure sensitive element.

Kotovsky, Jack

2014-02-11T23:59:59.000Z

170

Minimal Coupling in Koopman-von Neumann Theory  

E-Print Network [OSTI]

Classical mechanics (CM), like quantum mechanics (QM), can have an operatorial formulation. This was pioneered by Koopman and von Neumann (KvN) in the 30's. They basically formalized, via the introduction of a classical Hilbert space, earlier work of Liouville who had shown that the classical time evolution can take place via an operator, nowadays known as the Liouville operator. In this paper we study how to perform the coupling of a point particle to a gauge field in the KvN version of CM. So we basically implement at the classical operatorial level the analog of the minimal coupling of QM. We show that, differently than in QM, not only the momenta but also other variables have to be coupled to the gauge field. We also analyze in details how the gauge invariance manifests itself in the Hilbert space of KvN and indicate the differences with QM. As an application of the KvN method we study the Landau problem proving that there are many more degeneracies at the classical operatorial level than at the quantum one. As a second example we go through the Aharonov-Bohm phenomenon showing that, at the quantum level, this phenomenon manifests its effects on the spectrum of the quantum Hamiltonian while at the classical level there is no effect whatsoever on the spectrum of the Liouville operator.

E. Gozzi; D. Mauro

2001-05-23T23:59:59.000Z

171

Bei Abgabe per Email (helmut.buergmann@eawag.ch) bitte "Vorlesung Stoffwechsel" in den Header! Stoffwechsel von Mikroorganismen HS 2013  

E-Print Network [OSTI]

verschiedene Gärungsprozesse bei denen Wasserstoff entsteht. A) Geben Sie ein Beispiel (Reaktionsgleichung oder Schema) B) Welchen Zweck erfüllt die Herstellung von Wasserstoff für den gärenden Organismus? C) Welche anderen Stoffwechselwege nutzen den von Gärern hergestellten Wasserstoff? #12;

Wehrli, Bernhard

172

John von Neumann, 1956 | U.S. DOE Office of Science (SC)  

Office of Science (SC) Website

John von Neumann, 1956 John von Neumann, 1956 The Enrico Fermi Award Fermi Award Home Nomination & Selection Guidelines Award Laureates 2010's 2000's 1990's 1980's 1970's 1960's 1950's Ceremony The Life of Enrico Fermi Contact Information The Enrico Fermi Award U.S. Department of Energy SC-2/Germantown Building 1000 Independence Ave., SW Washington, DC 20585 P: (301) 903-9395 E: fermi.award@science.doe.gov 1950's John von Neumann, 1956 Print Text Size: A A A RSS Feeds FeedbackShare Page Citation For his scientific contribution to the theory of fast computing machines and for his original contributions to their design and construction. More than anyone else he foresaw the important and necessary role they would play in the control and use of atomic energy and to the general advancement of the arts and sciences for the benefit of mankind

173

Logic and Philosophy in the Century That Was It is a great pleasure to write in honour of Georg-Henrik von Wright. We met around  

E-Print Network [OSTI]

-Henrik von Wright. We met around 1980, when he came as a distinguished visitor to the philosophical institute in Groningen, where a Dutch student defended a dissertation on von Wright's intellectual Werdegang. The student taught Jaakko Hintikka". Von Wright's address makes many points which I would consider `received history

Amsterdam, University of

174

A luminescent nanocrystal stress gauge  

SciTech Connect (OSTI)

Microscale mechanical forces can determine important outcomes ranging from the site of material fracture to stem cell fate. However, local stresses in a vast majority of systems cannot be measured due to the limitations of current techniques. In this work, we present the design and implementation of the CdSe/CdS core/shell tetrapod nanocrystal, a local stress sensor with bright luminescence readout. We calibrate the tetrapod luminescence response to stress, and use the luminescence signal to report the spatial distribution of local stresses in single polyester fibers under uniaxial strain. The bright stress-dependent emission of the tetrapod, its nanoscale size, and its colloidal nature provide a unique tool that may be incorporated into a variety of micromechanical systems including materials and biological samples to quantify local stresses with high spatial resolution.

Choi, Charina; Koski, Kristie; Olson, Andrew; Alivisatos, Paul

2010-10-25T23:59:59.000Z

175

Holographic in situ stress measurements  

Science Journals Connector (OSTI)

......Stress-relief data have been obtained from our initial field deployment of the stressmeter in a horizontal borehole in an oil shale mine. These data establish the viability of holographic interferometry for deducing the level of in situ stress in boreholes......

Jay D. Bass; Douglas Schmitt; Thomas J. Ahrens

1986-04-01T23:59:59.000Z

176

Post-Traumatic Stress Disorder  

E-Print Network [OSTI]

Post-Traumatic Stress Disorder (PTSD) National Institute of Mental Health U.S. Department of HealtH anD HUman ServiceS · national institutes of Health #12;Contents What is post traumatic stress disorder after seeing or living through a dangerous event. When in danger, it's natural to feel afraid. This fear

Bandettini, Peter A.

177

ANALYSE POLLINIQUE DES MIELS DU QUBEC Pollenanalyse von Honigen aus Quebec  

E-Print Network [OSTI]

ANALYSE POLLINIQUE DES MIELS DU QU�BEC Pollenanalyse von Honigen aus Quebec Marie-José FELLER Rimouski (Québec) G5L 3Al; Canada SUMMARY POLLEN ANALYSIS OF HONEYS FROM QUEBEC Microscopic pollen analysis was made from 206 honey samples collected in all the beekeeping areas of Quebec during 1974 and 1975. Four

Paris-Sud XI, Université de

178

BIOMETRISCHE UNTERSUCHUNGEN ÜBER DIE MORPHOLOGISCHEN MERKMALE VON RANA RIDIBUNDA PALL (AMPHIBIA, SALIENTIA)  

Science Journals Connector (OSTI)

......sich die Mo'glichkeit, filr die in Rede stehende Froschspezies die nachstehenden...069 0-05; also ist auch hier keine Rede von einem Unterechied. Offenbar sind die FroschkOrperabschnitte iu der in Rede stehenden Beziehung zu wenig differenziert......

VON PAUL V. TERENTJEV

1931-11-01T23:59:59.000Z

179

Press Release Von Roll Inova to build the UK's largest energy-from-waste  

E-Print Network [OSTI]

, and regenerative heat recovery is used to boost the plant's overall energy efficiency. The majority of the wastePress Release Von Roll Inova to build the UK's largest energy-from-waste plant Zürich, September, 1 Roll Inova will build the UK's largest energy-from-waste facility. The contract is worth approximately

Columbia University

180

famelab-germany.de FameLab Germany wird prsentiert von  

E-Print Network [OSTI]

famelab-germany.de FameLab Germany wird präsentiert von Du ... studierst oder arbeitest in den Wissenschaftskommunikation #12;Anmeldung & Videos famelab-germany.de Let's taLK science! FameLab-Vorentscheid 22. März Medien- und Kommuni- kationstraining 5. + 6. April Berlin Finale FameLab Germany: 10. Mai Bielefeld

Hamburg,.Universität

Note: This page contains sample records for the topic "von mises stress" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

Formblatt LM Ma Informatik Version Oktober 2012 Zuordnung von Lehrmodulen im Masterstudium Informatik  

E-Print Network [OSTI]

Formblatt LM Ma Informatik Version Oktober 2012 Zuordnung von Lehrmodulen im Masterstudium Komplexität Modul-Nr. Name (Kurzform) KP Note PR Programmierung LM 1 VI Verteilte Informationssysteme LM 2 PV Parallele und Vert. Systemarchitekturen LM 3 OC Organic Computing LM 4 IE Intelligente eingebettete Systeme

Lübeck, Universität zu

182

Formblatt LM Ma Informatik Version Mai 2010 Zuordnung von Lehrmodulen im Masterstudium Informatik  

E-Print Network [OSTI]

Formblatt LM Ma Informatik Version Mai 2010 Zuordnung von Lehrmodulen im Masterstudium Informatik-Nr.^+ KP LZF Note PR Programmierung LM 1 VI Verteilte Informationssysteme LM 2 PV Parallele und Vert. Systemarchitekturen LM 3 OC Organic Computing LM 4 IE Intelligente eingebettete Systeme Summe KP SB Signal- und

Lübeck, Universität zu

183

MEAN DIMENSION, MEAN RANK, AND VON NEUMANN-L UCK RANK  

E-Print Network [OSTI]

MEAN DIMENSION, MEAN RANK, AND VON NEUMANN-L ¨UCK RANK HANFENG LI AND BINGBING LIANG Abstract. We introduce an invariant, called mean rank, for any module M of the integral group ring of a discrete amenable group , as an analogue of the rank of an abelian group. It is shown that the mean dimension

Li, Hanfeng

184

Einzigartige energiesparende Lsungen mit einem Stromverbrauch von 0,0 Watt im Standby und  

E-Print Network [OSTI]

Einzigartige energiesparende Lösungen mit einem Stromverbrauch von 0,0 Watt im Standby und ECO,9 cm (22 Zoll) TFT Bildschirm 0-Watt-Energiesparmodus Datenblatt Ausgabedatum April 2009 Genie�en Sie Merkmale IPS (In Plane Switching), 0 Watt im Energiesparmodus, ECO-Taste, ECO-Status-LED: 3 Farben für 3

Ott, Albrecht

185

Einzigartige energiesparende Lsungen mit einem Stromverbrauch von 0,0 Watt im Standby und  

E-Print Network [OSTI]

Einzigartige energiesparende Lösungen mit einem Stromverbrauch von 0,0 Watt im Standby und ECO P Line mit 0-Watt-Energiesparmodus DaTEnBLaTT Ausgabedatum Oktober 2009 Genie�en Sie die perfekte dieses 66 cm (26 Zoll)-Widescreen-Displays der P Line. #12;P26W-5 ECO IPS Besondere Merkmale 0 Watt im

Ott, Albrecht

186

E-Print Network 3.0 - adelbert von chamisso Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

(fl.), F. W. H. A. von Humboldt et A. J. A. Bonpland s.n. (B-W 02374 -00 0... here): SURINAME. Loco non indicato, (fl.), C. G. Dahlberg s.n. (SBT 4.2.7.83). As Chamisso... ), and...

187

400 Jahre Chemie als Wissenschaft in Hamburg Von der Grndung des Akademischen Gymnasiums bis zu aktuellen  

E-Print Network [OSTI]

6 REIHE 1 400 Jahre Chemie als Wissenschaft in Hamburg Von der Gründung des Akademischen Gymnasiums bis zu aktuellen Forschungsthemen am Fachbereich Chemie der Universität Hamburg ZEIT UND ORT 08 als Wissenschaft in Hamburg zurückbli- cken. Der heutige Fachbereich Chemie der Universität Hamburg

Hamburg,.Universität

188

NANOTECHNOLOGY CENTER Eine Partnerschaft in Nanotechnologie von IBM Research und ETH Zrich  

E-Print Network [OSTI]

NANOTECHNOLOGY CENTER Eine Partnerschaft in Nanotechnologie von IBM Research und ETH Zürich and Rohrer Nanotechnology Center is part of a strategic partnership in nanosciences with ETH Zurich, one FACT SHEET Above: The campus of IBM Research - Zurich Right: The Binnig and Rohrer Nanotechnology

Cachin, Christian

189

Universal Remote Boot and Administration Service Sebastian Schmelzer, Dirk von Suchodoletz  

E-Print Network [OSTI]

Universal Remote Boot and Administration Service Sebastian Schmelzer, Dirk von Suchodoletz: {danielw,bona}@inf.ufpr.br carlos@fisica.ufpr.br Abstract--Booting operating systems over the network. Remote booting Linux and using PXE based environments for large scale system deployments are widely

190

Aufbau eines Frequenz-vervierfachten Diodenlasers fr die Photoionisation von Magnesium  

E-Print Network [OSTI]

Aufbau eines Frequenz-vervierfachten Diodenlasers für die Photoionisation von Magnesium this work, the construction and implementation of a laser-system for photo- ionization of magnesium is described. Finally, spectroscopic measurements of dierent magnesium isotopes are discussed with particular

Blatt, Rainer

191

John von Neumann Institute for Computing Different Types of Protein Folding Identified with  

E-Print Network [OSTI]

John von Neumann Institute for Computing Different Types of Protein Folding Identified://www.fz-juelich.de/nic-series/volume40 #12;Different Types of Protein Folding Identified with a Coarse-Grained Heteropolymer Model Stefan The identification of folding channels is one of the key tasks of protein folding studies. While secondary structures

Janke, Wolfhard

192

DT/GTI -SS 2009 47Darstellung von Information Bits und Bytes  

E-Print Network [OSTI]

· 7 Bit pro Zeichen EBCDIC (Extended Binary Coded Decimal Interchange Code) · IBM Erweiterung des BCD Information Darstellung von Zeichen ASCII (American Standard Code for Information Interchange), ISO, DIN 66003 Codes · 8 Bit pro Zeichen · 0000 0000 - 0011 1111 Kontrollzeichen 0100 0000 - 0111 1111 Satzzeichen 1000

Hellebrand, Sybille

193

DT/GTI -SS 2011 49Darstellung von Information Bits und Bytes  

E-Print Network [OSTI]

BCD Codes · 8 Bit pro Zeichen · 0000 0000 - 0011 1111 Kontrollzeichen 0100 0000 - 0111 1111 Information Darstellung von Zeichen ASCII (American Standard Code for Information Interchange), ISO, DIN 66003 · 7 Bit pro Zeichen EBCDIC (Extended Binary Coded Decimal Interchange Code) · IBM Erweiterung des

Hellebrand, Sybille

194

Stress bij eerstejaars geneeskundestudenten in Groningen  

Science Journals Connector (OSTI)

Veel geneeskundestudenten ervaren stress. Stress kan een negatieve invloed hebben op de gezondheid, de studie en de carrière. In dit onderzoek werd de prevalentie van stresservaring bij eerstej...

A. H. Hornstra; J. P. C. Jaspers…

2003-12-01T23:59:59.000Z

195

Category:Stress Test | Open Energy Information  

Open Energy Info (EERE)

Category Edit History Facebook icon Twitter icon Category:Stress Test Jump to: navigation, search Geothermalpower.jpg Looking for the Stress Test page? For detailed information...

196

Intergranular stresses in ZIRCALOY-2  

Science Journals Connector (OSTI)

The development of the understanding of the intergranular stresses in ZIRCALOY-2 is reviewed. Neutron diffraction measurements of the intergranular strains were made on rod-textured material and highly texture...

T. M. Holden; J. W. L. Pang; R. A. Holt

2002-03-01T23:59:59.000Z

197

Schindler, Jörg; Held, Martin (unter Mitarbeit von Gerd Würdemann) (2009): Postfossile Mobilität. Wegweiser für die Zeit nach dem Peak Oil  

Science Journals Connector (OSTI)

Ausgehend von diesem Motto spannen die Autoren den Rahmen ihrer Untersuchung auf: fossil = Verkehr, prä-/postfossil = Mobilität. Ziel ist es, eine „neue mentale Landkarte“ für die postfossile Mobilität (S. 20) zu...

Prof. Dr. Sabine Hofmeister

2010-12-01T23:59:59.000Z

198

Pheochromocytoma in von hippel-lindau disease: Distinct histopathologic phenotype compared to pheochromocytoma in multiple endocrine neoplasia type 2  

Science Journals Connector (OSTI)

Pheochromocytomas are rare neuroendocrine tumors that arise from chromaffin tissue. In a small subset of patients, pheochromocytomas occur as a manifestation of von Hippel-Lindau (VHL) disease. The histology o...

Christian A. Koch MD; David Mauro MD; PhD; McClellan M. Walther MD…

2002-03-01T23:59:59.000Z

199

Universit at Konstanz Entwurf und Analyse von Algorithmen Lehrstuhl f ur Praktische Informatik WS 2000/2001  

E-Print Network [OSTI]

Gewichts. (b) Gilt die Umkehrung von (a)? (c) Zeigen oder widerlegen Sie: Wenn in einem Graph G mit reellen oglichst klein ist. Zeigen Sie, da#25; dieses Problem durch das Bestimmen eines MST in G gel ost werden

Brandes, Ulrik

200

Exkursion zur Geschichte und Kultur Italiens am Beispiel von Rom und Venedig vom 14.-18.12.2012  

E-Print Network [OSTI]

Exkursion zur Geschichte und Kultur Italiens am Beispiel von Rom und Venedig vom 14 . AbendlichesTreffen in Rom mit Dr. Vani Ravipati (ehemalige PhDStudentin in Ulm) und ihrem Mann Mohan

Pfeifer, Holger

Note: This page contains sample records for the topic "von mises stress" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

Reaktive Molekularstrahlepitaxie und Charakterisierung von GaN/(Al,Ga)N-Heterostrukturen auf SiC(0001).  

E-Print Network [OSTI]

??Thema dieser Arbeit ist die Synthese von hexagonalen GaN/(Al,Ga)N-Heterostrukturen mittels reaktiver Molekularstrahlepitaxie (MBE) auf SiC(0001)-Substraten. Der Einfluß der Wachstumsbedingungen auf die strukturellen, morphologischen, optischen und… (more)

Thamm, Andreas

2001-01-01T23:59:59.000Z

202

Desmoceras (Pseudouhligella) intrapunctatum n. sp. (Ammonoidea) aus dem Unter-Albium von NW-Madagaskar mit Ritzstreifen  

Science Journals Connector (OSTI)

Aus den glaukonitischen Mergeln des Unter-Albiums von Ambatolafia im Mahajanga-Becken NW-Madagaskars wirdDesmoceras (Pseudouhligella) intrapunctatum als neue Ammoniten-Art (DesmoceratoideaZittel, 1895) eingeführt...

Helmut Keupp

2008-12-01T23:59:59.000Z

203

Über Metallalkyl- und -aryl-Verbindungen: XXXVII. Strukturverfeinerung von Methylkalium. Darstellung von KCD3 und Neutronenbeugungsuntersuchung bei 1.35 und 290 K  

Science Journals Connector (OSTI)

The crystal structure of methylpotassium has been refined by neutron diffraction carried out on powder samples of KCD3 at 1.35 and 290 K. Pyramidal methyl ions were found with bond angles of 105° at 1.35 K and of 109° at 290 K, which are comparable to those of NH3. In the crystal the methyl ions have alernating orientations and each carbanion is coordinated by six K ions in a distorted trigonal-prismatic array. The three K ions close to the sp3 lone electron pair have short K?C contacts (2 × 295, 1 × 302 pm), whereas the K iions close to the H atoms have longer K?C distances (2 × 344, 1 × 330 pm). An orthorhombic umit cell (Pmcn, Nr. 62, a 419.56(2), b 730.73(3), c 816.44(3) pm, Z = 4, 1.35 K) has now been found as compared to the smaller hexagonal cell (Z = 2) detected previously by X-ray methods (without precise location of the H atoms). The preparation of KCD3 and LiCD3 is described and IR data of KCD3 are given. Zusammenfassung Die Kristallstruktur von Methylkalium wurde an Pulverproben von KCD3 durch Neutronenbeugung bei 1.35 und 290 K bestimmt. Es ergaben sich pyramidale Methyl-Anionen mit Bindungswinkeln 105° (1.35 K) bzw. 109° (290 K), ähnlich denen von NH3. Im Kristall haben die Methyl-Ionen alternierende Orientierungen; jedes Carbanion ist verzerrt trigonal-prismatisch durch sechs K-Ionen koordiniert. Drei dem freien sp3-Elektronenpaar benachbarte K-Ionen haben kurze K?C-Kontakte (2 × 295, 1 × 302 pm), wogegen die den H-Atomen benachbarten K-Ionen längere K?C-Abstände zeigen (2 × 344, 1 × 330 pm). Eine orthorhombische Elementarzelle (Pmcn, Nr. 62, a 419.56(2), b 730.73(8), c 816.44(3) pm, Z = 4, 1.35 K) wurde jetzt gefunden anstelle der früher röntgenographisch ermittelten kleineren hexagonalen Zelle (ohen genaue H-Atomlagen). Die Darstellung von KCD3 und LiCD3 wird beschrieben und IR-Daten für KCD3 werden mitgeteilt.

Erwin Weiss; Thomas Lambertsen; Bernd Schubert; Jeremy Karl Cockcroft

1988-01-01T23:59:59.000Z

204

Original article Growth stresses in tension wood  

E-Print Network [OSTI]

Original article Growth stresses in tension wood: role of microfibrils and lignification T Okuyama the growth stress generation in the region of normal and tension woods. growth stress/ tension wood in normal and ten- sion wood. The compressive stress from the deposition of lignin controls the level

Paris-Sud XI, Université de

205

Chronic stress elevates telomerase activity in rats  

Science Journals Connector (OSTI)

...Chronic stress elevates telomerase activity in rats Annaliese K. Beery 1 * Jue Lin 2 Joshua...unpredictable stress on telomerase activity in male rats. Telomerase activity was 54 per cent higher in stressed rats than in controls, and associated with stress-related...

2012-01-01T23:59:59.000Z

206

Projektarbeit Basisjahr 2010 12. Mrz 2010 Installation von Bluetooth-Dongle und Serial-Port  

E-Print Network [OSTI]

Projektarbeit Basisjahr 2010 12. März 2010 Installation von Bluetooth-Dongle und ­Serial-Port Mini CD · Dongle anbringen Im Geräte Manager überprüfen · BlueSoleil starten Serial Port · Gerät Parani. Benutzt dazu eine Büroklammer und drückt einige Zeit auf auf dem Bluetooth COM- Port. · Merkt

207

Seite 1 von 2 Virtual Trained-in-GermanY China  

E-Print Network [OSTI]

Seite 1 von 2 Einladung Virtual Trained-in-GermanY China 17.04.2014, 10h00 - 18h00 CST www.trained-in-germany Virtual Trained in GermanY in Brasilien, Indien und Südafrika findet die nächste virtuelle Jobmesse für Deutschland-Alumni in China statt: www.trained-in-germany.com/china. Die Trained in German

Hellebrand, Sybille

208

Von Neumann-Lueders projection, and its applicability to EPR experiments  

E-Print Network [OSTI]

Notwithstanding it is well known that von Neumann's projection postulate is inapplicable to most realistic measurement procedures, it keeps haunting the foundations of quantum mechanics. In particular its applicability to EPR experiments is often assumed. In the present contribution this problem is considered from the point of view of a quantum mechanical theory of measurement, allowing a treatment of projection in EPR experiments as a special case of conditional preparation. The conditions are spelled out under which the postulate may be applicable.

Willem M. de Muynck

2008-10-06T23:59:59.000Z

209

von Willebrand Factor–Cleaving Protease in Thrombotic Thrombocytopenic Purpura and the Hemolytic–Uremic Syndrome  

Science Journals Connector (OSTI)

...fibrinolysis, and platelet-aggregating agents have been implicated in the development of thrombotic thrombocytopenic purpura–hemolytic–uremic syndrome. Moake et al. and Charba et al. attributed the enhanced intravascular platelet clumping in these syndromes to the presence of unusually large polymers of von... Thrombotic thrombocytopenic purpura, a disseminated thrombotic microangiopathy, was initially described by Moschcowitz in 1924.1 Three decades later, Gasser et al.2 reported a similar disorder in children that they called the hemolytic–uremic syndrome. ...

Furlan M.; Robles R.; Galbusera M.

1998-11-26T23:59:59.000Z

210

Linkage disequilibrium patterns vary with chromosomal location: A case study from the von Willebrand factor region  

SciTech Connect (OSTI)

Linkage disequilibrium analysis has been used as a tool for analyzing marker order and locating disease genes. Under appropriate circumstances, disequilibrium patterns reflect recombination events that have occurred throughput a population's history. As a result, disequilibrium mapping may be useful in genomic regions of <1 cM where the number of informative meioses needed to detect recombinant individuals within pedigrees is exceptionally high. Its utility for refining target areas for candidate disease genes before initiating chromosomal walks and cloning experiments will be enhanced as the relationship between linkage disequilibrium and physical distance is better understood. To address this issue, the authors have characterized linkage disequilibrium in a 144-kb region of the von Willebrand factor gene on chromosome 12. Sixty CEPH and 12 von Willebrand disease families were genotypes for five PCR-based markers, which include two microsatellite repeats and three single-base-pair substitutions. Linkage disequilibrium and physical distance between polymorphisms are highly correlated (r[sub m] = -.76; P<.05) within this region. None of the five markers showed significant disequilibrium with the von Willebrand disease phenotype. The linkage disequilibrium/physical distance relationship was also analyzed as a function of chromosomal location for this and eight previously characterized regions. This analysis revealed a general trend in which linkage disequilibrium dissipates more rapidly with physical distance in telomeric regions than in centromeric regions. This trend is consistent with higher recombination rates near telomeres. 52 refs., 3 figs., 4 tabs.

Watkins, W.S.; Zenger, R.; O'Brien, E.; Jorde, L.B. (Univ. of Utah School of Medicine, Salt Lake City, UT (United States)); Nyman, D. (Aland Central Sjukhus (Finland)); Eriksson, A.W. (Free Univ., Amsterdam (Netherlands)); Renlund, M.

1994-08-01T23:59:59.000Z

211

Über einfache, allgemein anwendbare Mikromethoden zur Bestimmung von Kohlenstoff-Wasserstoff, Stickstoff und Sauerstoff und eine hierzu entwickelte, automatisch gesteuerte Verbrennungsapparatur  

Science Journals Connector (OSTI)

Einfache, universell anwendbare Mikromethoden zur Bestimmung von Kohlenstoff-Wasserstoff, Stickstoff und Sauerstoff werden beschrieben, die zur Analyse aller organischen und vieler metallorganischer Verbindung...

Irene Monar

1965-01-01T23:59:59.000Z

212

Health Psychology What is Stress?  

E-Print Network [OSTI]

environment 2) Some Definitions: a) Generic- demands exceed capacity - engineering origins b) Biological stress responses, and (e) physical and mental health outcomes #12;Person-Environment Fit ! Sufficient-capability imbalance in the organism's vital adjustment and which is partially manifested by a nonspecific response

Meagher, Mary

213

Holographic in situ stress measurements  

Science Journals Connector (OSTI)

......surrounding a single borehole. (2) To...require a drilling rig to operate...so that a large amount of...obtained in a borehole farther removed...instrument is too large for deployment...model of the borehole wall response to drilling a stress-relief......

Jay D. Bass; Douglas Schmitt; Thomas J. Ahrens

1986-04-01T23:59:59.000Z

214

Heat Stress - HPMC Occupational Health Services  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Awareness Cold and Flu Prevention Hand Washing Healthy Sleep Heat Stress Radon Signs of a Heart Attack Signs of a Stroke Distracted Driving Coping with Stress & Change Skin Cancer...

215

Social buffering: relief from stress and anxiety  

Science Journals Connector (OSTI)

...Lundeberg, T2002Social stress blocks energy conservation in rats exposed to an oxytocin-injected...unwanted pregnancies. Am. J. Public Health. 63, 935-938. Morris...relief from stress and anxiety. | Communication is essential to members of a...

2006-01-01T23:59:59.000Z

216

Determination of Longitudinal Stress in Rails  

E-Print Network [OSTI]

The objective of this research is to determine the longitudinal stress in rails by using the polarization of Rayleigh waves. Analytical models are developed to describe the effect of applied stress on wave speed and on the polarization of Rayleigh...

Djayaputra, Ferdinand

2012-02-14T23:59:59.000Z

217

Cell Component Accelerated Stress Test Protocols for PEM Fuel...  

Broader source: Energy.gov (indexed) [DOE]

Cell Component Accelerated Stress Test Protocols for PEM Fuel Cells Cell Component Accelerated Stress Test Protocols for PEM Fuel Cells Accelerated Stress Test Protocols for PEM...

218

Membrane and MEA Accelerated Stress Test Protocols | Department...  

Broader source: Energy.gov (indexed) [DOE]

Membrane and MEA Accelerated Stress Test Protocols Membrane and MEA Accelerated Stress Test Protocols This presentation on fuel cell membrane and MEA stress test protocols was...

219

Butz, T. and von Stryk, O.: Modelling and Simulation of ER and MR Fluid Dampers 1 ZAMM Z. angew. Math. Mech. 78 (1998) 0, 122  

E-Print Network [OSTI]

Butz, T. and von Stryk, O.: Modelling and Simulation of ER and MR Fluid Dampers 1 ZAMM · Z. angew. Math. Mech. 78 (1998) 0, 1­22 Butz, T.; von Stryk, O. Modelling and Simulation of Electro, phenomenological models, numerical simulation, pas- sive suspension MSC (1991): 65C20, 76A05 1 Introduction Electro

Stryk, Oskar von

220

3 Grundlagen der Darstellung und Verarbeitung von Information 3.2 Codes 3-21(39) 3.2.3 Basis--Darstellung natrlicher Zahlen  

E-Print Network [OSTI]

Anwendungen wird oft dezimal gerechnet ­ dann meist in BCD-Darstellung (binary coded decimals), d. h. jede3 Grundlagen der Darstellung und Verarbeitung von Information 3.2 Codes 3-21(39) 3.2.3 Basis.2 Codes 3-22(40) Beweis: Wir verwenden den Satz von der Division mit Rest: Zu 0 und gibt es einen

Arndt, Holger

Note: This page contains sample records for the topic "von mises stress" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

Kinetische energie von produktionen aus ionen-molekül-reaktionen bei thermischen energien  

Science Journals Connector (OSTI)

Zusammenfassung Geschwindigkeitsverteilungen von Sckund?r-Ionen aus Ionen-Molekül-Reaktionen in Wasserstoff, Methan und Gemischen von Wasserstoff mit Edel-gasen wurden mit der Ablenkmethode gemessen. Durch Pulsen der Ionenquelle wurde erreicht, dass die meisten der Sekundär-Ionen in einem feldfreien Raum gebildet wurden, d.h., die meisten der reagierenden Ionen hatten thermische kinetische Energie, Es ergab sich, dass die mittlere kinetische Energie einiger Produktionen im Laborsystem zweimal oder dreimal grösser was als die mittlere thermische Energie der Prim?r-Ionen. Das bedeutet, dass die Nachweiswahrscheinlichkeit für sekundäre und primäre Ionen in einem konventionellen Massenspektrometer ver-schieden sein kann. Die beobachtete kinetische Energie der HeH+-, NeH+- und CD5+-Ionen kann erklärt werden, wenn man eine Umwandlung von innerer Energie der Reaktanten in kinetische Energie der Produkte annimmt. Velocity distributions of secondary ions formed by ion-molecule reactions in hydrogen, methane, and mixtures of hydrogen and noble gases were measured using the deflection method. The ion-source was pulsed; therefore, most of the secondary ions were formed in a field-free region, i.e. most of the reacting ions had thermal kinetic energy. The mean kinetic energy of some product ions in the laboratory system was found to be twice or three times larger than the thermal energy of the primary ions. That means that the collection efficiency for secondary and primary ions may be different in a conventional mass spectrometer. The observed kinetic energy of the HeH+, NeH+ and CD5+ ions can be explained if the internal energy of the reactants is assumed to be transformed into translational energy of the products.

Paul-Jörg Bauer; Hans-Joachim Drewitz

1970-01-01T23:59:59.000Z

222

Tensile Effective Stresses in Hydrocarbon Storage Caverns  

E-Print Network [OSTI]

Tensile Effective Stresses in Hydrocarbon Storage Caverns Hippolyte Djizanne and Pierre Bérest LMS, Germany,1-2 October 2012 TENSILE EFFECTIVE STRESSES IN HYDROCARBON STORAGE CAVERNS Hippolyte Djizanne1 that effective tensile stresses can be generated at a cavern wall after a rapid increase or decrease in pressure

Paris-Sud XI, Université de

223

Tensile effective stresses in hydrocarbon storage caverns  

E-Print Network [OSTI]

The "no-tensile effective stress" criterion is discussed. It is proven that effective tensile stresses can be generated at a cavern wall after a rapid increase or decrease in pressure. The Etzel K-102 test, performed in Germany more than 20 years ago, is revisited using the notion of effective tensile stresses.

Djizanne, Hippolyte; Brouard, Benoît

2013-01-01T23:59:59.000Z

224

von Neumann-Landau equation for wave functions, wave-particle duality and collapses of wave functions  

E-Print Network [OSTI]

It is shown that von Neumann-Landau equation for wave functions can present a mathematical formalism of motion of quantum mechanics. The wave functions of von Neumann-Landau equation for a single particle are `bipartite', in which the associated Schr\\"{o}dinger's wave functions correspond to those `bipartite' wave functions of product forms. This formalism establishes a mathematical expression of wave-particle duality and that von Neumann's entropy is a quantitative measure of complementarity between wave-like and particle-like behaviors. Furthermore, this extension of Schr\\"{o}dinger's form suggests that collapses of Schr\\"{o}dinger's wave functions can be regarded as the simultaneous transition of the particle from many levels to one.

Zeqian Chen

2007-03-22T23:59:59.000Z

225

StressSense: Detecting Stress in Unconstrained Acoustic Environments using Smartphones  

E-Print Network [OSTI]

-life conversational situations us- ing smartphones. Author Keywords mHealth, stress, sensing, user modeling, model

Campbell, Andrew T.

226

Method for deriving information regarding stress from a stressed ferromagnetic material  

DOE Patents [OSTI]

A nondestructive evaluation technique is disclosed for deriving stress in ferromagnetic materials including deriving anhysteretic and hysteresis magnetization curves for the material in both unstressed and stressed states. The anhysteretic curve is expressed as a Langevin function. The stress is expressed as an equivalent magnetic field dependent on stress and change of magnetostriction with magnetization. By measurement of these bulk magnetic properties, stress can be derived.

Jiles, D.C.

1991-04-30T23:59:59.000Z

227

Method for deriving information regarding stress from a stressed ferromagnetic material  

DOE Patents [OSTI]

A non-destructive evaluation technique for deriving stress in ferromagnetic materials including deriving anhysteretic and hysteresis magnetization curves for the material in both unstressed and stressed states. The anhysteretic curve is expressed as a Langevin function. The stress is expressed as an equivalent magnetic field dependent on stress and change of magnetostriction with magnetization. By measurement of these bulk magnetic properties, stress can be derived.

Jiles, David C. (Ames, IA)

1991-04-30T23:59:59.000Z

228

Stress analysis of piping elbows  

SciTech Connect (OSTI)

The problem undertaken in this paper is the investigation of the stresses generated in circular piping elbows of variable thickness, under the influence of uniform internal pressure. It is observed now that the material region and the imposed loading conform to the same axial symmetry. This fact strongly suggests the employment of toroidal coordinates and the Boussinesq-Papkovitch-Neuber (BPN) potential function approach towards obtaining the solution to the above posed problem. The results obtained by this BPN approach are compared with the numerical solution generated by a boundary integral equation approach. The comparison yields a good agreement.

Choi, J.; Rentzepis, G.M. [Georgia Inst. of Tech., Atlanta, GA (United States). George W. Woodruff School of Mechanical Engineering

1996-12-31T23:59:59.000Z

229

A phonetic study of stress in Korean  

Science Journals Connector (OSTI)

Stress in Korean (Seoul) has been controversial for many years: Some linguists believe there is word?level stress and others do not. Among those who believe that word?level stress exists there has been controversy regarding its location: the first or second syllable (H. Lee 1973) the second syllable (Huh 1985) or the final syllable (Choi 1935). Even though it has been shown that there is no fixed acoustic property of stress researchers have found that stress is detectable based on duration amplitude and F0 [Fry (1958) Lea (1977) Beckman (1986)]. By examining these prosodic features this paper investigates whether there is stress in Korean and if so what its domain and location are. Words with a reiterated syllable /na/ or /ta/ were uttered by native Seoul speakers in different prosodic positions. The preliminary results show that Korean stress is not a word?level but a phrase?level stress: The location of the stressed syllable depends on its position in an accentual phrase (Jun 1993). In addition the stress falls on either the first or the second syllable of the phrase depending on the number of syllables in the phrase syllable weight and the position of the phrase in the sentence.

Sun?Ah Jun

1995-01-01T23:59:59.000Z

230

bersicht ber evaluierte Lehrveranstaltungen und Dozierende der Lehreinheit Chemie Seite 1 von 1 Anrede Vorname Name Anmel  

E-Print Network [OSTI]

�bersicht über evaluierte Lehrveranstaltungen und Dozierende der Lehreinheit Chemie Seite 1 von 1 Prof. Dr. Uwe Beginn nein Chemie Frau Brigitte HartmannAzanza nein Chemie Herr Dr. Dereje Hailu Taffa nein Chemie Herr Dr. Ulrich Wahlbrink nein Chemie Herr Prof. Dr. Lorenz Walder nein

Kallenrode, May-Britt

231

X-ray diffraction experiments with femtosecond time D. VON DER LINDE and K. SOKOLOWSKI-TINTEN  

E-Print Network [OSTI]

X-ray diffraction experiments with femtosecond time resolution D. VON DER LINDE and K. SOKOLOWSKI-essen.de (Received 4 March 2002) Abstract. Intense ultrashort laser pulses enable the generation of subpico- second X-ray pulses in the multi-kilovolt range of photon energies. These X- ray pulses have opened the door

von der Linde, D.

232

Residual stresses in annealed zircaloy  

SciTech Connect (OSTI)

Neutron diffraction has been used to measure the lattice constants of single crystal and rod-textured polycrystalline Zircaloy-2 in the temperature range 300-900 K. While the single crystal remains strain-free during heating or cooling, large residual grain-interaction strains occur in the polycrystalline sample as the result of compatibility being maintained among grains with anisotropic thermal expansion coefficients. These residual thermal strains have been determined as a function of temperature from the difference between the single and polycrystal lattice constants. Analysis of the data has been done using a polycrystalline deformation model, QUEST, which accounts for anisotropic elasticity, plasticity and thermal expansion, and for crystallographic texture of the sample. It is found that slow cooling from 900 K introduces residual stresses of the order of 100 MPa in the polycrystalline sample. The calculations demonstrate that these residual stresses can explain not only the difference in the proportional limits in tension and compression (strength differential) but also differences in the initial work hardening behaviour when Zircaloy-2 is deformed in tension or compression.

Tome, C.; Faber, J.; MacEwen, S.R.

1989-03-01T23:59:59.000Z

233

Viscosity, Shear Waves, and Atomic-Level Stress-Stress Correlations  

SciTech Connect (OSTI)

The Green-Kubo equation relates the macroscopic stress-stress correlation function to a liquid's viscosity. The concept of the atomic-level stresses allows the macroscopic stress-stress correlation function in the equation to be expressed in terms of the space-time correlations among the atomic-level stresses. Molecular dynamics studies show surprisingly long spatial extension of stress-stress correlations and also longitudinal and transverse waves propagating in liquids over ranges which could exceed the system size. The results reveal that the range of propagation of shear waves corresponds to the range of distances relevant for viscosity. Thus our results show that viscosity is a fundamentally nonlocal quantity. We also show that the periodic boundary conditions play a nontrivial role in molecular dynamics simulations, effectively masking the long-range nature of viscosity.

Levashov, Valentin A [ORNL; Morris, James R [ORNL; Egami, Takeshi [ORNL

2011-01-01T23:59:59.000Z

234

Koopman-von Neumann Formulation of Classical Yang-Mills Theories: I  

E-Print Network [OSTI]

In this paper we present the Koopman-von Neumann (KvN) formulation of classical non-Abelian gauge field theories. In particular we shall explore the functional (or classical path integral) counterpart of the KvN method. In the quantum path integral quantization of Yang-Mills theories concepts like gauge-fixing and Faddeev-Popov determinant appear in a quite natural way. We will prove that these same objects are needed also in this classical path integral formulation for Yang-Mills theories. We shall also explore the classical path integral counterpart of the BFV formalism and build all the associated universal and gauge charges. These last are quite different from the analog quantum ones and we shall show the relation between the two. This paper lays the foundation of this formalism which, due to the many auxiliary fields present, is rather heavy. Applications to specific topics outlined in the paper will appear in later publications.

P. Carta; E. Gozzi; D. Mauro

2005-08-31T23:59:59.000Z

235

Optical stress generator and detector  

DOE Patents [OSTI]

Disclosed is a system for the characterization of thin films and interfaces between thin films through measurements of their mechanical and thermal properties. In the system light is absorbed in a thin film or in a structure made up of several thin films, and the change in optical transmission or reflection is measured and analyzed. The change in reflection or transmission is used to give information about the ultrasonic waves that are produced in the structure. The information that is obtained from the use of the measurement methods and apparatus of this invention can include: (a) a determination of the thickness of thin films with a speed and accuracy that is improved compared to earlier methods; (b) a determination of the thermal, elastic, and optical properties of thin films; (c) a determination of the stress in thin films; and (d) a characterization of the properties of interfaces, including the presence of roughness and defects.

Maris, Humphrey J. (Barrington, RI); Stoner, Robert J. (Duxbury, MA)

2001-01-01T23:59:59.000Z

236

Optical stress generator and detector  

DOE Patents [OSTI]

Disclosed is a system for the characterization of thin films and interfaces between thin films through measurements of their mechanical and thermal properties. In the system light is absorbed in a thin film or in a structure made up of several thin films, and the change in optical transmission or reflection is measured and analyzed. The change in reflection or transmission is used to give information about the ultrasonic waves that are produced in the structure. The information that is obtained from the use of the measurement methods and apparatus of this invention can include: (a) a determination of the thickness of thin films with a speed and accuracy that is improved compared to earlier methods; (b) a determination of the thermal, elastic, and optical properties of thin films; (c) a determination of the stress in thin films; and (d) a characterization of the properties of interfaces, including the presence of roughness and defects.

Maris, Humphrey J. (Barrington, RI); Stoner, Robert J. (Duxbury, MA)

1998-01-01T23:59:59.000Z

237

Optical stress generator and detector  

DOE Patents [OSTI]

Disclosed is a system for the characterization of thin films and interfaces between thin films through measurements of their mechanical and thermal properties. In the system light is absorbed in a thin film or in a structure made up of several thin films, and the change in optical transmission or reflection is measured and analyzed. The change in reflection or transmission is used to give information about the ultrasonic waves that are produced in the structure. The information that is obtained from the use of the measurement methods and apparatus of this invention can include: (a) a determination of the thickness of thin films with a speed and accuracy that is improved compared to earlier methods; (b) a determination of the thermal, elastic, and optical properties of thin films; (c) a determination of the stress in thin films; and (d) a characterization of the properties of interfaces, including the presence of roughness and defects. 32 figs.

Maris, H.J.; Stoner, R.J.

1998-05-05T23:59:59.000Z

238

Optical stress generator and detector  

DOE Patents [OSTI]

Disclosed is a system for the characterization of thin films and interfaces between thin films through measurements of their mechanical and thermal properties. In the system light is absorbed in a thin film or in a structure made up of several thin films, and the change in optical transmission or reflection is measured and analyzed. The change in reflection or transmission is used to give information about the ultrasonic waves that are produced in the structure. The information that is obtained from the use of the measurement methods and apparatus of this invention can include: (a) a determination of the thickness of thin films with a speed and accuracy that is improved compared to earlier methods; (b) a determination of the thermal, elastic, and optical properties of thin films; (c) a determination of the stress in thin films; and (d) a characterization of the properties of interfaces, including the presence of roughness and defects.

Maris, Humphrey J. (Barrington, RI); Stoner, Robert J (Duxbury, MA)

1999-01-01T23:59:59.000Z

239

Optical stress generator and detector  

DOE Patents [OSTI]

Disclosed is a system for the characterization of thin films and interfaces between thin films through measurements of their mechanical and thermal properties. In the system light is absorbed in a thin film or in a structure made up of several thin films, and the change in optical transmission or reflection is measured and analyzed. The change in reflection or transmission is used to give information about the ultrasonic waves that are produced in the structure. The information that is obtained from the use of the measurement methods and apparatus of this invention can include: (a) a determination of the thickness of thin films with a speed and accuracy that is improved compared to earlier methods; (b) a determination of the thermal, elastic, and optical properties of thin films; (c) a determination of the stress in thin films; and (d) a characterization of the properties of interfaces, including the presence of roughness and defects.

Maris, Humphrey J. (Barrington, RI); Stoner, Robert J (Duxbury, MA)

2002-01-01T23:59:59.000Z

240

Stress corrosion cracking under low stress: Continuous or discontinuous Longkui K. Zhu a  

E-Print Network [OSTI]

Stress corrosion cracking under low stress: Continuous or discontinuous cracks? Longkui K. Zhu a , Yu Yan a , Jinxu X. Li a , Lijie J. Qiao a, , Alex A. Volinsky b,a a Corrosion and Protection Center. Stress corrosion C. Anodic dissolution a b s t r a c t Two-dimensional and three-dimensional crack

Volinsky, Alex A.

Note: This page contains sample records for the topic "von mises stress" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

StressSense: detecting stress in unconstrained acoustic environments using smartphones  

Science Journals Connector (OSTI)

Stress can have long term adverse effects on individuals' physical and mental well-being. Changes in the speech production process is one of many physiological changes that happen during stress. Microphones, embedded in mobile phones and carried ubiquitously ... Keywords: mHealth, model adaptation, sensing, stress, user modeling

Hong Lu; Denise Frauendorfer; Mashfiqui Rabbi; Marianne Schmid Mast; Gokul T. Chittaranjan; Andrew T. Campbell; Daniel Gatica-Perez; Tanzeem Choudhury

2012-09-01T23:59:59.000Z

242

Residual Stresses in Weldments by Neutron Diffraction  

E-Print Network [OSTI]

Residual Stresses in Weldments by Neutron Diffraction Shanmukha Rao M, Jon James, Shirley Northover :- The neutron diffraction is determined from Bragg's law. When neutron propagate through crystal sample, Coherent, Incoherent and Absorption Scattering phenomena take place Weld MaterialsPlate materials Stress

Bandara, Arosha

243

THE STRESS-STRAIN RELATIONS OF RUBBER  

Science Journals Connector (OSTI)

THE STRESS-STRAIN RELATIONS OF RUBBER 10.1126/science.8.202.673-a C. M. BROOMALL M EDIA , P A. THE STRESS-STRAIN RELATIONS OF RUBBER. | Journal Article SCIENCE. Prominent as the object is thus likely to become...

C. M. BROOMALL

1898-11-11T23:59:59.000Z

244

MANAGING JOB LOSS and FINANCIAL STRESS  

E-Print Network [OSTI]

-hunting strategy. Put time and energy into planning actions that will lead to your next job such as preparingMANAGING JOB LOSS and FINANCIAL STRESS a Personal and Family Guide CENTER ON THE FAMILY #12;2 Managing Job Loss and Financial Stress The issues associated with losing one's job or having hours cut

245

Over Core Stress | Open Energy Information  

Open Energy Info (EERE)

Over Core Stress Over Core Stress Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Over Core Stress Details Activities (1) Areas (1) Regions (0) NEPA(0) Exploration Technique Information Exploration Group: Lab Analysis Techniques Exploration Sub Group: Rock Lab Analysis Parent Exploration Technique: Rock Lab Analysis Information Provided by Technique Lithology: Stratigraphic/Structural: Hydrological: Thermal: Dictionary.png Over Core Stress: No definition has been provided for this term. Add a Definition Related Techniques Rock Lab Analysis Core Analysis Cuttings Analysis Isotopic Analysis- Rock Over Core Stress Paleomagnetic Measurements Petrography Analysis Rock Density X-Ray Diffraction (XRD) X-Ray Fluorescence (XRF) References Page Area Activity Start Date Activity End Date Reference Material

246

Residual stress patterns in steel welds  

SciTech Connect (OSTI)

Neutron strain scanning of residual stress is a valuable nondestructive tool for evaluation of residual stress in welds. The penetrating characteristic of neutrons permits mapping of strain patterns with a spatial resolution approaching 1mm at depths of 20mm in steels. While the overall patterns of the residual stress tensor in a weld are understood, the detailed patterns depend on welding process parameters and the effects of solid state transformation. The residual strain profiles in two multi-pass austenitic welds and a ferritic steel weld are presented. The stress-free lattice parameters within the fusion zone and the adjacent heat affected zone in the two austenitic welds show that the interpretation of residual stress from strains are affected by welding parameters. An interpretation of the residual strain pattern in the ferritic steel plate can be made using the strain measurements of a Gleeble test bar which has undergone the solid state austenite decomposition.

Spooner, S.; Hubbard, C.R.; Wang, X.L.; David, S.A.; Holden, T.M. [Oak Ridge National Lab., TN (United States); Root, J.H.; Swainson, I. [Atomic Energy of Canada Ltd., Chalk River, ON (Canada)

1994-12-31T23:59:59.000Z

247

Predicting Thermal Stress in Diesel Particulate Filters | Department...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Thermal Stress in Diesel Particulate Filters Predicting Thermal Stress in Diesel Particulate Filters 2004 Diesel Engine Emissions Reduction (DEER) Conference Presentation: Corning...

248

Structure, tectonics and stress field of the Coso Range, Inyo...  

Open Energy Info (EERE)

been produced by the regional stress field rather than to have been of volcanogenic origin. Focal mechanisms of small-magnitude earthquakes support the stress directions...

249

DOE Cell Component Accelerated Stress Test Protocols for PEM...  

Broader source: Energy.gov (indexed) [DOE]

Cell Component Accelerated Stress Test Protocols for PEM Fuel Cells DOE Cell Component Accelerated Stress Test Protocols for PEM Fuel Cells This document describes test protocols...

250

Science Against Stress: Research Shows Way to Some Cellular Relief...  

Energy Savers [EERE]

Science Against Stress: Research Shows Way to Some Cellular Relief Science Against Stress: Research Shows Way to Some Cellular Relief December 30, 2011 - 10:14am Addthis...

251

The Role of Geochemistry and Stress on Fracture Development and...  

Broader source: Energy.gov (indexed) [DOE]

The Role of Geochemistry and Stress on Fracture Development and Proppant Behavior in EGS Reservoirs The Role of Geochemistry and Stress on Fracture Development and Proppant...

252

W.-C. RONTGEN. 2014 Neue Versuche ber die Absorption von Wrme durch Was-serdampf (Absorption de la chaleur par la vapeur d'eau ) ; Annalen der Physik  

E-Print Network [OSTI]

181 W.-C. RONTGEN. 2014 Neue Versuche über die Absorption von Wärme durch Was- serdampf (Absorption

Boyer, Edmond

253

Predicting residual stresses in gas turbine components  

Science Journals Connector (OSTI)

This article describes work carried out by a major aircraft-engine builder and one of its suppliers to validate the numerical prediction of heat-treatment-induced residual stresses. For verification, the proje...

R. A. Wallis Ph.D.; I. W. Craighead B.Sc. Eng.

1995-10-01T23:59:59.000Z

254

Stress corrosion cracking of power boiler drums  

Science Journals Connector (OSTI)

This paper deals with the study, analysis and technical diagnosis fundamentals concerning damage induced by stress corrosion cracking. The main repair and safe operation methods for power boiler drums are described; this work being based on plant experience.

Alecsandru Pavel; Alexandru Pelle; Alexandru Epure; Cornel Radulescu; Petric? Baciu; Alexandru Bogdan; Mihai Stefanescu

1991-01-01T23:59:59.000Z

255

Grading of lumber using stress waves  

E-Print Network [OSTI]

The goal of this research was to develop stress wave grading technology suitable for small lumber mills. Specific goals include: 1) develop an ultrasonic probe configuration to facilitate real-time grain angle and edge knot measurement, 2) determine...

Bethi, Rajeshwar

2012-06-07T23:59:59.000Z

256

Membrane and MEA Accelerated Stress Test Protocols  

Broader source: Energy.gov (indexed) [DOE]

and MEA Accelerated Stress Test Protocols Presented at High Temperature Membrane Working Group Meeting Washington, DC May 14, 2007 T.G. Benjamin Argonne National Laboratory 2 0 10...

257

Definition: Stress Test | Open Energy Information  

Open Energy Info (EERE)

1426&contextusgsstaffpub Ret Like Like You like this.Sign Up to see what your friends like. rieved from "http:en.openei.orgwindex.php?titleDefinition:StressTest&oldid688731...

258

Stress corrosion crack growth in porous sandstones.   

E-Print Network [OSTI]

Stress corrosion crack growth occurs when the chemical weakening of strained crack tip bonds facilitates crack propagation. I have examined the effect of chemical processes on the growth of a creack population by carrying out triaxial compression...

Ojala, Ira O

259

Microbes and Agrochemicals to Stress Tolerance  

Science Journals Connector (OSTI)

Global climatic change significantly modulates physiology of drought. Related are increase in CO2 concentration and mineral deficiency. Drought is one of the major stresses that limit agriculture productivity. Dr...

Asghari Bano; Noshin Ilyas

2010-01-01T23:59:59.000Z

260

Experimental Verification of Solidification Stress Theory  

SciTech Connect (OSTI)

A research program is being conducted to develop a crack-free ceramic waste form (CWF) to be used for long term encasement of fission products and actinides resulting from processing spent nuclear fuel. Cracking usually occurs in the cooldown phase of the glass or ceramic formations. A crack-free formation should have more resistance to leaching than one with many cracks. In the research leading up to producing a CWF, a model was developed that proposes a permanent stress develops when the melt solidifies and that this stress can cause failure as the CWF nears room temperature. This paper reports on how the formation, CWF2, confirms the existence of this stress. The solidification stress is in addition to and of opposite sign of the thermal stress. Its derivation is reported on in Ref. 1. Cracking of the CWF would occur at low temperatures if solidification stress exists but at high temperatures if it doesn’t. If solidification stress occurs, then the cooldown rate during solidification should be reduced. If not, it should be reduced when the thermal stresses are highest. Recording cracking sounds confirm the existence of this solidification stress since cracking occurred during the low temperature phase of the cooldown. As a side purpose of this paper, a cooldown rate is proposed that should eliminate cracking in the next experiment, CWF3. CWF2 is a prototype vertical ceramic waste cylinder formed over a period of 10 days by heating a mixture of 75% zeolite, 25% glass frit in an argon atmosphere furnace through melting to 925 C and then cooling through solidification to room temperature. It is approximately 1 m high, 0.5 m in diameter, weighs about 400 kg, and is formed in a stainless steel can 0.5 cm thick. This cylinder developed many cracks on cooldown. At least 15 loud cracks were recorded over a period of 4 days at the end of cooldown when the temperatures were below 400 C. The CWF2 surface and centerline temperatures at mid height were measured which allowed the stress to be calculated. The timing of the cracks was compared to the time the calculated total stress exceeded the tensile stress limit and verified that the cause of the cracking was solidification stress and not thermal stress. Since the CWF is encased in a can in a furnace, the cracks cannot be easily observed but can be detected with sound measurements. Similarly, the stress cannot be measured but only estimated with analysis. Destructive examination of the CWF after cooldown was used to determine the pattern of the cracking which appeared to be initiated mainly in the inner region which is evidence the cracking is due to solidification stress.

C.W. Solbrig; M.C. Morrison; M.F. SImpson; K.J. Bateman

2012-04-01T23:59:59.000Z

Note: This page contains sample records for the topic "von mises stress" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

Residual stress in nanocrystalline nickel tungsten electrodeposits  

E-Print Network [OSTI]

Characterizing the residual stress of thick nanocrystalline electrodeposits poses several unique challenges due to their fine grain structure, thickness distribution, and matte surface. We employ a three-dimensional ...

Ziebell, Tiffany D. (Tiffany Dawn)

2011-01-01T23:59:59.000Z

262

Calculator programs for pipe stress engineering  

SciTech Connect (OSTI)

This book contains a collection of programs for solving a wide variety of stress problems using both the TI-59 and HP-41CV calculators. Each program is prefaced with a description of the problem to be solved, nomenclature, code restrictions and program limitations. Solutions are explained analytically and then followed by the complete program listing, documentation and checklists. Topics include calculations for pipewall thickness, pressure vessel analysis, reinforcement pads, allowable span, vibration, stress, and two-anchor piping systems.

Morgan, K.S.

1985-01-01T23:59:59.000Z

263

Enhanced von Weizsäcker Wang-Govind-Carter kinetic energy density functional for semiconductors  

SciTech Connect (OSTI)

We propose a new form of orbital-free (OF) kinetic energy density functional (KEDF) for semiconductors that is based on the Wang-Govind-Carter (WGC99) nonlocal KEDF. We enhance within the latter the semi-local von Weizsäcker KEDF term, which is exact for a single orbital. The enhancement factor we introduce is related to the extent to which the electron density is localized. The accuracy of the new KEDF is benchmarked against Kohn-Sham density functional theory (KSDFT) by comparing predicted energy differences between phases, equilibrium volumes, and bulk moduli for various semiconductors, along with metal-insulator phase transition pressures. We also compare point defect and (100) surface energies in silicon for a broad test of its applicability. This new KEDF accurately reproduces the exact non-interacting kinetic energy of KSDFT with only one additional adjustable parameter beyond the three parameters in the WGC99 KEDF; it exhibits good transferability between semiconducting to metallic silicon phases and between various III-V semiconductors without parameter adjustment. Overall, this KEDF is more accurate than previously proposed OF KEDFs (e.g., the Huang-Carter (HC) KEDF) for semiconductors, while the computational efficiency remains at the level of the WGC99 KEDF (several hundred times faster than the HC KEDF). This accurate, fast, and transferable new KEDF holds considerable promise for large-scale OFDFT simulations of metallic through semiconducting materials.

Shin, Ilgyou [Department of Chemistry, Princeton University, Princeton, New Jersey 08544-1009 (United States)] [Department of Chemistry, Princeton University, Princeton, New Jersey 08544-1009 (United States); Carter, Emily A., E-mail: eac@princeton.edu [Department of Mechanical and Aerospace Engineering, Program in Applied and Computational Mathematics, and Andlinger Center for Energy and the Environment, Princeton University, Princeton, New Jersey 08544-5263 (United States)

2014-05-14T23:59:59.000Z

264

Cell Component Accelerated Stress Test Protocols for PEM Fuel Cells  

Broader source: Energy.gov [DOE]

Accelerated Stress Test Protocols for PEM Fuel Cells, Electrocatalysts, Supports, Membranes, and Membrane Electrode Assemblies

265

Are stress distributions along faults the signature of asperity squeeze? J. Schmittbuhl,1  

E-Print Network [OSTI]

earthquakes roughen the stress fields, or that strong heterogeneities of the stress field persist along

Schmittbuhl, Jean

266

Stress-dependent surface reactions and implications for a stress measurement technique  

E-Print Network [OSTI]

to roughen. This phenomenon has recently led to a novel experimental technique to determine the stress state is also known to change the mobility of a reaction. By this mechanism, the stress may either roughen at the troughs than at the crests, so that the wave amplitude grows over time, and the surface roughens. When

Suo, Zhigang

267

Yield stress and elastic modulus of suspensions of noncolloidal particles in yield stress fluids  

E-Print Network [OSTI]

this yield stress; above the yield stress they behave as liquids, and their flow behavior is usually well more complex at the approach of the transition between the liquid and the solid regimes [Coussot (2005 and Jorrot (2001)], a cement paste [Geiker et al. (2002)], a foam [Cohen-Addad et al. (2007)] or coal

Paris-Sud XI, Université de

268

Internal Stress in a Model Elasto-Plastic Fluid  

E-Print Network [OSTI]

Plastic materials can carry memory of past mechanical treatment in the form of internal stress. We introduce a natural definition of the vorticity of internal stress in a simple two-dimensional model of elasto-plastic fluids, which generates the internal stress. We demonstrate how the internal stress is induced under external loading, and how the presence of the internal stress modifies the plastic behavior.

Takeshi Ooshida; Ken Sekimoto

2005-12-03T23:59:59.000Z

269

Matter sourced anisotropic stress for dark energy  

Science Journals Connector (OSTI)

Usually a dark energy as a perfect fluid is characterized by the ratio of pressure to energy density (w=p/?) and the ratio of their perturbations in its rest frame (cs2=?p/??). However, a dark energy would have other characteristics beyond its equation of state and the effective speed of sound. Here the extra property is the anisotropic stress sourced by matter as a simple extension to the perfect fluid model. At the background level, this anisotropic stress is zero with respect to the cosmological principle, but not at the first-order perturbation. We tested the viability of the existence of this kind of anisotropic stress by using the currently available cosmic observations through the geometrical and dynamical measurements. Using the Markov-chain Monte Carlo method, we found that the upper bounds on the anisotropic stress which enters into the summation of the Newtonian potentials should be of the order O(10?3)?m. We did not find any strong evidence for the existence of this matter-sourced anisotropic stress, even in the 1? region.

Baorong Chang; Jianbo Lu; Lixin Xu

2014-11-24T23:59:59.000Z

270

A High shear stress segment along the San Andreas Fault: Inferences based on near-field stress direction and stress magnitude observations in the Carrizo Plain Area  

SciTech Connect (OSTI)

Nearly 200 new in-situ determinations of stress directions and stress magnitudes near the Carrizo plain segment of the San Andreas fault indicate a marked change in stress state occurring within 20 km of this principal transform plate boundary. A natural consequence of this stress transition is that if the observed near-field ``fault-oblique`` stress directions are representative of the fault stress state, the Mohr-Coulomb shear stresses resolved on San Andreas sub-parallel planes are substantially greater than previously inferred based on fault-normal compression. Although the directional stress data and near-hydrostatic pore pressures, which exist within 15 km of the fault, support a high shear stress environment near the fault, appealing to elevated pore pressures in the fault zone (Byerlee-Rice Model) merely enhances the likelihood of shear failure. These near-field stress observations raise important questions regarding what previous stress observations have actually been measuring. The ``fault-normal`` stress direction measured out to 70 km from the fault can be interpreted as representing a comparable depth average shear strength of the principal plate boundary. Stress measurements closer to the fault reflect a shallower depth-average representation of the fault zone shear strength. If this is true, only stress observations at fault distances comparable to the seismogenic depth will be representative of the fault zone shear strength. This is consistent with results from dislocation monitoring where there is pronounced shear stress accumulation out to 20 km of the fault as a result of aseismic slip within the lower crust loading the upper locked section. Beyond about 20 km, the shear stress resolved on San Andreas fault-parallel planes becomes negligible. 65 refs., 15 figs.

Castillo, D. A., [Department of Geology and Geophysics, University of Adelaide (Australia); Younker, L.W. [Lawrence Livermore National Lab., CA (United States)

1997-01-30T23:59:59.000Z

271

Energy plan stresses free market approach  

Science Journals Connector (OSTI)

Energy plan stresses free market approach ... The current policy embodies a commitment to assist the market in efficiently distributing all the nation's energy resources. ... It emphasizes removing impediments to market activity and continuing a basic and applied research program that is supposed to increase the number of energy options for private sector development. ...

JOSEPH HAGGIN

1983-03-14T23:59:59.000Z

272

Parasite stress promotes homicide and child maltreatment  

Science Journals Connector (OSTI)

...chromosomes 1p22 and 6q27 control visceral leishmaniasis in Sudan. PLoS Genet. 3, 679-688. 10.1371/journal.pgen...www.census.gov . 49 Simister, J. , Cooper, C. 2005 Thermal stress in the U.S.A.: effects on violence and on employee...

2011-01-01T23:59:59.000Z

273

SANDIA REPORT SAND98-0260 UC-705 Unlimited Release  

Office of Scientific and Technical Information (OSTI)

8-0260 UC-705 8-0260 UC-705 Unlimited Release Printed February 1998 An Efficient Method for Calculating RMS von Mises Stress in a Random Vibration Environment Daniel J. Segalman, Clay W. G. Fulcher, Garth M. Reese, R Prepared by Sandia National Labora Sc2900Q18-81) Issued by Sanma National Laboratories, operated for the United States Department of Energy by Sandia Corporation. NOTICE: This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Govern- ment nor any agency thereof, nor any of their employees, nor any of their contractors, subcontractors, or their employees, makes any warranty, express or implied, o r assumes any legal liability or responsibility for the accuracy, completeness, o

274

Sequential water stress in cotton: yield response to stress in early and peak flowering stages  

E-Print Network [OSTI]

*) was determined independently of SD and CS* was defined as the reduction in yield per unit of stress day factor (SD) for each period of growth. A stress day index analysis was performed using data from a 1985 study (Clark, 1986) and the 1986 study. Plots.... . . . . . . . . . . . . . . . . . . . . . . . . . . . , . . . . . . . . . . . . . . . . Daily average wind runs for sheltered and unsheltered treatment areas. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . , . . . . . . . . . Table 6. Comparison of 1985 and 1986 yield, water use, and water use...

Prochaska, James Frank

2012-06-07T23:59:59.000Z

275

Stress-Strain Model of Unconfined and Confined Concrete and Stress-block Parameters  

E-Print Network [OSTI]

identified that concrete compressive strength, confining reinforcement ratio and section geometry as the major parameters that control the stress-strain relation of confined concrete. The authors identified that a convenient way of expressing... consideration within spacing 21 , = yield stress of confining reinforcement, = center distance between hoop/ties confining reinforcement. The influence of the section geometry was represented by the ?section geometry factor?, , which expresses...

Murugesan Reddiar, Madhu Karthik

2010-07-14T23:59:59.000Z

276

Stress Test At Coso Geothermal Area (2004) | Open Energy Information  

Open Energy Info (EERE)

Stress Test At Coso Geothermal Area (2004) Stress Test At Coso Geothermal Area (2004) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Stress Test At Coso Geothermal Area (2004) Exploration Activity Details Location Coso Geothermal Area Exploration Technique Stress Test Activity Date 2004 Usefulness not indicated DOE-funding Unknown Exploration Basis EGS potential of Coso Geothermal Region Notes A hydraulic fracturing stress test at 3,703 feet TVD was used to constrain a normal faulting and strike-slip faulting stress tensor for this reservoir. The shear and normal stresses resolved on the fracture and fault planes were calculated and used to identify the subset of critically stressed planes that act to maintain permeability within the Coso Geothermal Field. References

277

Exploratory test of utility of magnetic insulation for electrostatic accelerators L. R. Grisham, A. von Halle, A. F. Carpe, Guy Rossi, K. R. Gilton et al.  

E-Print Network [OSTI]

Exploratory test of utility of magnetic insulation for electrostatic accelerators L. R. Grisham, A;Exploratory test of utility of magnetic insulation for electrostatic accelerators L. R. Grisham,a) A. von of the electrodes in an electrostatic accelerator, along with their support structures, might suppress field

Gilson, Erik

278

Abbildung 22: Blick auf die HERMES Eisen/Szintillator-Wand zur Identifikation von hoch-energetischenMyonen. Im Zentrum erkenntman einen der beiden HERA-Quadrupole,in die  

E-Print Network [OSTI]

Datensatz aus den Jahren 1996/97 an longitudinal polarisiertem Wasserstoff, einen ex- perimentellen Zugang polarisierten Wasserstoff-Target durchgeführt. Mit diesem Target sollen zu einem späteren Zeit- punkt weitere Analyse auf den Daten der Jahre 1996 und 1997 mit dem polarisier- ten Wasserstoff-Target. Eine Reihe von

279

3 Grundlagen der Darstellung und Verarbeitung von Information 3.2 Codes 3-19(43) Noch mehr Zeichen darstellbar, indem man  

E-Print Network [OSTI]

dezimal gerechnet -- dann meist in BCD-Darstellung (binary coded decimals), d. h. jede Dezimalziffer wird3 Grundlagen der Darstellung und Verarbeitung von Information 3.2 Codes 3-19(43) ­ Noch mehr"), z. B. 0001033016 = (gotischer Buchstabe ,,ahsa") * einige der 16-bit-Codes reserviert, um damit auf

Arndt, Holger

280

3 Grundlagen der Darstellung und Verarbeitung von Information 3.2 Codes 3-24(47) Quiz 3.19: Wie lautet die Dualdarstellung ( = 2) der Zahl = 3710?  

E-Print Network [OSTI]

. · In kaufmännischen Anwendungen wird oft dezimal gerechnet ­ dann meist in BCD-Darstellung (binary coded decimals), d3 Grundlagen der Darstellung und Verarbeitung von Information 3.2 Codes 3-24(47) Quiz 3.19: Wie Information 3.2 Codes 3-25(48) Praktisch relevante Basen: · = 10 (Dezimaldarstellung) ­ im Alltag übliche

Arndt, Holger

Note: This page contains sample records for the topic "von mises stress" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

3 Grundlagen der Darstellung und Verarbeitung von Information 3.2 Codes 3-18(43) Unicode: einheitliches Codierungsschema fr alle Zeichen aller Sprachen  

E-Print Network [OSTI]

meist in BCD-Darstellung (binary coded decimals), d. h. jede Dezimalziffer w3 Grundlagen der Darstellung und Verarbeitung von Information 3.2 Codes 3-18(43) · Unicode verschiedene Zeichen (,,Ebene 0"): * 000016­007F16: entsprechen dem 7-bit ASCII-Code * 008016­00FF16

Arndt, Holger

282

3 Grundlagen der Darstellung und Verarbeitung von Information 3.2 Codes 3-24(47) Quiz 3.19: Wie lautet die Dualdarstellung ( = 2) der Zahl = 3710?  

E-Print Network [OSTI]

Anwendungen wird oft dezimal gerechnet ­ dann meist in BCD-Darstellung (binary coded decimals), d. h. jede3 Grundlagen der Darstellung und Verarbeitung von Information 3.2 Codes 3-24(47) Quiz 3.19: Wie Information 3.2 Codes 3-25(48) Praktisch relevante Basen: · = 10 (Dezimaldarstellung) ­ im Alltag übliche

Arndt, Holger

283

Original article A study on growth stresses, tension wood  

E-Print Network [OSTI]

Original article A study on growth stresses, tension wood distribution and other related wood variations of wood structure (specific gravity and pulp yield), and the transverse mechanical resistance of wood. To investigate growth stresses, longitudinal displacements after stress release were estimated

Paris-Sud XI, Université de

284

TURBULENT SHEAR STRESS IN HETEROGENEOUS SEDIMENT-LADEN FLOWS  

E-Print Network [OSTI]

TURBULENT SHEAR STRESS IN HETEROGENEOUS SEDIMENT-LADEN FLOWS By Hyoseop Woo,1 Associate Member are the beginning of motion of sediment particles and sediment transport in alluvial channels. If shear stress can be well defined in clear-water flows, compar- atively little is known about shear stresses in sediment

Julien, Pierre Y.

285

Stress distribution under heavy haul transporters  

SciTech Connect (OSTI)

In a previous cited paper, comparisons were made between the relationship of maximum vertical compressive stress generated with depth by various vehicles, including an automobile, a fully-loaded 18-wheel tractor-trailer combination, a test-loaded 12-axle, 96-wheel heavy transporter trailer, and the transporter prime mover, also test loaded. This paper extends the usefulness of those comparisons by adding a 12-axle, 144-wheel heavy transporter trailer. The transporter is a one-and-one-half-wide hydraulic platform trailer test loaded to 110% of the loading from a Westinghouse steam generator. The total weight on the transporter trailer tires is just over 675 tons. This trailer will be used in an upcoming steam generator replacement project. In addition to examining the distribution of maximum vertical stress with depth, the paper looks at the variation of loading beneath the maximum loaded axle of the transporter at different depths.

Davie, J.R.; Senapathy, H. [Bechtel Power Corp., Gaithersburg, MD (United States)

1999-11-01T23:59:59.000Z

286

Method and apparatus for measuring stress  

DOE Patents [OSTI]

A method and apparatus for determining stress in a material independent of micro-structural variations and anisotropies. The method comprises comparing the velocities of two horizontally polarized and horizontally propagating ultrasonic shear waves with interchanged directions of propagation and polarization. The apparatus for carrying out the method comprises periodic permanent magnet-electromagnetic acoustic transducers for generating and detecting the shear waves and means for determining the wave velocities.

Thompson, R.B.

1983-07-28T23:59:59.000Z

287

Municipal solid waste effective stress analysis  

SciTech Connect (OSTI)

The mechanical behavior of municipal solid waste (MSW) has attracted the attention of many researchers in the field of geo-environmental engineering in recent years and several aspects of waste mechanical response under loading have been elucidated. However, the mechanical response of MSW materials under undrained conditions has not been described in detail to date. The knowledge of this aspect of the MSW mechanical response is very important in cases involving MSW with high water contents, seismic ground motion and in regions where landfills are built with poor operation conditions. This paper presents the results obtained from 26 large triaxial tests performed both in drained and undrained conditions. The results were analyzed taking into account the waste particles compressibility and the deformation anisotropy of the waste samples. The waste particles compressibility was used to modify the Terzaghi effective stress equation, using the Skempton (1961) proposition. It is shown that the use of the modified effective stress equation led to much more compatible shear strength values when comparing Consolidated-Drained (CD) and Consolidated-Undrained (CU), results, explaining the high shear strength values obtained in CU triaxial tests, even when the pore pressure is almost equal to the confining stress.

Shariatmadari, Nader, E-mail: shariatmadari@iust.ac.i [Dept. of Civil Engineering, Iran University of Science and Technology, Narmak, 16846-13114 Teharn (Iran, Islamic Republic of); Machado, Sandro Lemos, E-mail: smachado@ufba.b [Dept. of Materials Science and Technology, Federal University of Bahia, 02 Aristides Novis St., 40210-630 Salvador-BA (Brazil); Noorzad, Ali, E-mail: noorzad@pwut.ac.i [Faculty of Water Engineering, Power and Water University of Technology, Tehranpars, 1719-16765 Tehran (Iran, Islamic Republic of); Karimpour-Fard, Mehran, E-mail: karimpour_mehran@iust.ac.i [Dept. of Civil Engineering, Iran University of Science and Technology, Narmak, 16846-13114 Teharn (Iran, Islamic Republic of)

2009-12-15T23:59:59.000Z

288

Models of Stochastic, Spatially Varying Stress in the Crust Compatible with Focal-Mechanism Data, and How Stress Inversions  

E-Print Network [OSTI]

Models of Stochastic, Spatially Varying Stress in the Crust Compatible with Focal-Mechanism Data. Heaton Abstract Evidence suggests that slip in earthquakes and the resultant stress changes are spatially heterogeneous. If crustal stress from past earthquakes is spatially hetero- geneous, then earthquake focal

Greer, Julia R.

289

Microseismicity, stress, and fracture in the Coso geothermal field,  

Open Energy Info (EERE)

Microseismicity, stress, and fracture in the Coso geothermal field, Microseismicity, stress, and fracture in the Coso geothermal field, California Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: Microseismicity, stress, and fracture in the Coso geothermal field, California Details Activities (1) Areas (1) Regions (0) Abstract: Microseismicity, stress, and fracture in the Coso geothermal field are investigated using seismicity, focal mechanisms and stress analysis. Comparison of hypocenters of microearthquakes with locations of development wells indicates that microseismic activity has increased since the commencement of fluid injection and circulation. Microearthquakes in the geothermal field are proposed as indicators of shear fracturing associated with fluid injection and circulation along major pre-existing

290

The determination of thru-thickness residual bending stresses  

E-Print Network [OSTI]

cross section; modules of elasticity; separation between outcr bars of discrete model or height of continuous cross section; ratio between stress change induced by N'th cycle reloading in top outer bar to yield stress; ks i = ratio between stress... change induced by N'th cycle reloading in top inner bar to yield stress; applied moment; AM = virtual moment applied as part of elastic unloading; ratio of induced change in curvature to change in curvature required to yield an initially stress free...

Rinehart, Adam James

2012-06-07T23:59:59.000Z

291

Stress State of the Earth's Crust in Azerbaijan  

SciTech Connect (OSTI)

The study of the crustal stress has a practical implication in hazard mitigation. Knowledge on stress-related ground motion may help to improve the stability of public and private buildings. The stress state of the crust in Azerbaijan is studied in this paper by means of focal mechanism analysis and using different methods to determine the principal stress orientations. Two types of stress states were revealed in the studied regions. The territory of Great and Lesser Caucasus and Talysh folded zone are characterized by near-horizontal compression. The territories of Caspian Sea and Kura depression are characterized by near-horizontal tension. For both types of stress state, the predominant stress axes are oriented perpendicular to the regional geological structures.

Agayeva, Solmaz T. [Geology Institute, Azerbaijan National Academy of Sciences, 29A, H. Javid Ave., Baku 1143 (Azerbaijan)

2006-03-23T23:59:59.000Z

292

The model of stress distribution in polymer electrolyte membrane  

E-Print Network [OSTI]

An analytical model of mechanical stress in a polymer electrolyte membrane (PEM) of a hydrogen/air fuel cell with porous Water Transfer Plates (WTP) is developed in this work. The model considers a mechanical stress in the membrane is a result of the cell load cycling under constant oxygen utilization. The load cycling causes the cycling of the inlet gas flow rate, which results in the membrane hydration/dehydration close to the gas inlet. Hydration/dehydration of the membrane leads to membrane swelling/shrinking, which causes mechanical stress in the constrained membrane. Mechanical stress results in through-plane crack formation. Thereby, the mechanical stress in the membrane causes mechanical failure of the membrane, limiting fuel cell lifetime. The model predicts the stress in the membrane as a function of the cell geometry, membrane material properties and operation conditions. The model was applied for stress calculation in GORE-SELECT.

Atrazhev, Vadim V; Dmitriev, Dmitry V; Erikhman, Nikolay S; Sultanov, Vadim I; Patterson, Timothy; Burlatsky, Sergei F

2014-01-01T23:59:59.000Z

293

The model of stress distribution in polymer electrolyte membrane  

E-Print Network [OSTI]

An analytical model of mechanical stress in a polymer electrolyte membrane (PEM) of a hydrogen/air fuel cell with porous Water Transfer Plates (WTP) is developed in this work. The model considers a mechanical stress in the membrane is a result of the cell load cycling under constant oxygen utilization. The load cycling causes the cycling of the inlet gas flow rate, which results in the membrane hydration/dehydration close to the gas inlet. Hydration/dehydration of the membrane leads to membrane swelling/shrinking, which causes mechanical stress in the constrained membrane. Mechanical stress results in through-plane crack formation. Thereby, the mechanical stress in the membrane causes mechanical failure of the membrane, limiting fuel cell lifetime. The model predicts the stress in the membrane as a function of the cell geometry, membrane material properties and operation conditions. The model was applied for stress calculation in GORE-SELECT.

Vadim V. Atrazhev; Tatiana Yu. Astakhova; Dmitry V. Dmitriev; Nikolay S. Erikhman; Vadim I. Sultanov; Timothy Patterson; Sergei F. Burlatsky

2014-01-17T23:59:59.000Z

294

Core stress distribution of phase shifting multimode polymer optical fiber  

SciTech Connect (OSTI)

Poly-(methyl methacrylate-co-benzyl methacrylate) polarization-maintaining optical fibers are known for their high response to normal stress. In this report, responses to higher stress levels up to 0.45?MPa were investigated. The stress amplitude and direction in the fiber cross section were calculated and analyzed with a coincident mode-field obtained from the near-field pattern. The stress amplitude varies significantly in the horizontal direction and is considered to create multiple phases, explaining the measurement results. To investigate possible permanent deformation, the core yield point profile was analyzed. Although it largely exceeds the average applied stress, the calculated stress distribution indicates that the core could partially experience stress that exceeds the yield point.

Furukawa, Rei, E-mail: furukawa@ee.uec.ac.jp; Matsuura, Motoharu [Center for Frontier Science and Engineering, The University of Electro-Communications, Chofugaoka 1-5-1, Chofu, Tokyo 182-8585 (Japan)] [Center for Frontier Science and Engineering, The University of Electro-Communications, Chofugaoka 1-5-1, Chofu, Tokyo 182-8585 (Japan); Nagata, Morio; Mishima, Kenji [Research Center for Advanced Science and Technology, The University of Tokyo, Meguro-ku, Tokyo 153-8904 (Japan)] [Research Center for Advanced Science and Technology, The University of Tokyo, Meguro-ku, Tokyo 153-8904 (Japan); Inoue, Azusa; Tagaya, Akihiro; Koike, Yasuhiro [Keio Photonics Research Institute, Keio University, Saiwaiku Shinkawasaki 7-1, Kawasaki, Kanagawa 212-0032 (Japan)] [Keio Photonics Research Institute, Keio University, Saiwaiku Shinkawasaki 7-1, Kawasaki, Kanagawa 212-0032 (Japan)

2013-11-18T23:59:59.000Z

295

Environmental Stress and The Expression of Inbreeding Depression in Drosophila melanogaster  

E-Print Network [OSTI]

high competition conditions, and male mating success (Tablesuccess under benign and stressful conditions………………………………………………………………..success after exposure to stressful conditions……………………..

Enders, Laramy Sherian

2010-01-01T23:59:59.000Z

296

Der Briefwechsel zwischen Sidonie Na?dherny? und Albert Bloch : September 1947-September 1950 : mit einer Einfu?hrung in die Widmungsgedichte von Karl Kraus an Sidonie Na?dherny?  

E-Print Network [OSTI]

Die Aufgabe dieser Arbeit besteht darin, Sidonie Na?dherny? Einfluß auf das Werk von Karl Kraus, vor allem auf seine Lyrik, an Hand der Albert Bloch/Sidonie Na?dherny?-Korrespondenz auszuwerten. Neben den eigentlichen ...

Champion, Elke Lorenz

1998-01-01T23:59:59.000Z

297

Jürgen Weber, Martina Bender, Oliver Eitelwein und Pascal Nevries: Von Private Equity Controllern lernen. Wie Controller und Manager mit Finanzinvestoren erfolgreich zusammenarbeiten. Wiley-VCH Verlag, Weinheim 2009, 272 Seiten, ISBN 978-3-527-50426-8, 59 Euro  

Science Journals Connector (OSTI)

Das Buch gliedert sich in fünf Hauptkapitel. Zunächst wird geklärt, was die Besonderheiten von Private Equity sind. Als charakteristisch wird herausgearbeitet, dass die Investition zeitlich beschränkt ist und, da...

Prof. Dr. Stefan Behringer

2010-09-01T23:59:59.000Z

298

Surgery versus Physiotherapy for Stress Urinary Incontinence  

Science Journals Connector (OSTI)

...pelvic-organ prolapse of stage 2 or higher (according to the Pelvic Organ Prolapse Quantification system) were excluded. The ethics committee of the Utrecht Medical Center and the institutional review boards at the individual sites approved the study protocol (available at NEJM.org). The last author assumes... In this multicenter trial comparing physiotherapy and sling surgery in women with stress urinary incontinence, the surgery group had higher rates of subjective improvement and cure at 1 year; 49% of the women in the physiotherapy group crossed over to surgery.

Labrie J.; Berghmans B.L.C.M.; Fischer K.

2013-09-19T23:59:59.000Z

299

Effects of Prenatal Stress on Insulin Sensitivity, Physiological Stress Responses, Growth, and Temperament of Brahman Calves  

E-Print Network [OSTI]

prior to the ACTH infusion. .............................................................................. 39 Figure 4. Mean serum cortisol concentrations following an intravenous ACTH challenge in both control (C; open circle) and prenatally stressed... = 0.13), had an effect on serum cortisol concentrations following the infusion. ............................................................. 40 Figure 5. Mean serum cortisol concentrations before and after an intravenous corticotropin...

Schmidt, Sarah Erin

2014-04-24T23:59:59.000Z

300

CHAPTER 9 - The Stress Analysis Environment  

Science Journals Connector (OSTI)

Publisher Summary The finite element method (FEM) is a mathematical/computer-based numerical technique for calculating the strength and behavior of engineering structures. Autodesk Inventor— and much other analysis software—is based on the FEM, where, simply, a component is broken down into many small elements. There are three methods within Autodesk Inventor Simulation that can be used to enhance the accuracy of the results: P-refinement, H-refinement, and higher order elements. Autodesk Inventor Simulation is only capable of performing linear analysis, where components have small deformations, under operational loading conditions. On the other hand, nonlinear analysis is typically involved when components are experiencing large deformations and thus component material can deform beyond the elastic limit. This chapter describes static analysis. It is an engineering discipline that determines the stress in materials and structures subjected to static or dynamic forces or loads. The aim of the analysis is usually to determine whether the element or collection of elements, usually referred to as a structure or component, can safely withstand the specified forces and loads. This is achieved when the determined stress from the applied force(s) is less than the yield strength the material is known to be able to withstand.

Wasim Younis

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "von mises stress" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

Stress-Assisted Corrosion in Boiler Tubes  

SciTech Connect (OSTI)

A number of industrial boilers, including in the pulp and paper industry, needed to replace their lower furnace tubes or decommission many recovery boilers due to stress-assisted corrosion (SAC) on the waterside of boiler tubes. More than half of the power and recovery boilers that have been inspected reveal SAC damage, which portends significant energy and economic impacts. The goal of this project was to clarify the mechanism of stress-assisted corrosion (SAC) of boiler tubes for the purpose of determining key parameters in its mitigation and control. To accomplish this in-situ strain measurements on boiler tubes were made. Boiler water environment was simulated in the laboratory and effects of water chemistry on SAC initiation and growth were evaluated in terms of industrial operations. Results from this project have shown that the dissolved oxygen is single most important factor in SAC initiation on carbon steel samples. Control of dissolved oxygen can be used to mitigate SAC in industrial boilers. Results have also shown that sharp corrosion fatigue and bulbous SAC cracks have similar mechanism but the morphology is different due to availability of oxygen during boiler shutdown conditions. Results are described in the final technical report.

Preet M Singh; Steven J Pawel

2006-05-27T23:59:59.000Z

302

Stress anisotropy and velocity anisotropy in low porosity shale  

Science Journals Connector (OSTI)

Shales are known for often marked intrinsic anisotropy of many of their properties, including strength, permeability and velocity for example. In addition, it is well known that anisotropic stress fields can also have a significant impact on anisotropy of velocity, even in an isotropic medium. This paper sets out to investigate the ultrasonic velocity response of well-characterised low porosity shales from the Officer Basin in Western Australia to both isotropic and anisotropic stress fields and to evaluate the velocity response to the changing stress field. During consolidated undrained multi-stage triaxial tests on core plugs cut normal to bedding, Vpv increases monotonically with increasing effective stress and Vs1 behaves similarly although with some scatter. Vph and Vsh remain constant initially but then decrease within each stage of the multi-stage test, although velocity from stage to stage at any given differential stress increases. This has the impact of decreasing both P-wave (?) and S-wave anisotropy (?) through application of differential stress within each loading stage. However, increasing the magnitude of an isotropic stress field has little effect on the velocity anisotropies. The intrinsic anisotropy of the shale remains reasonably high at the highest confining pressures. The results indicate the magnitude and orientation of the stress anisotropy with respect to the shale microfabric has a significant impact on the velocity response to changing stress fields.

U. Kuila; D.N. Dewhurst; A.F. Siggins; M.D. Raven

2011-01-01T23:59:59.000Z

303

Effects of Shared Activity on Dyadic Stress Response.  

E-Print Network [OSTI]

??The purpose of this study was to assess sex differences in stress responses to cooperative and competitive activities within same-sex dyads. Participants included 90 undergraduate… (more)

Auer, Brandon John

2011-01-01T23:59:59.000Z

304

Surge Nozzle NDE Specimen Mechanical Stress Improvement Analysis  

SciTech Connect (OSTI)

The purpose of this project was to perform a finite element analysis of a pressurized water reactor pressurizer surge nozzle mock-up to predict both the weld residual stresses created in its construction and the final stress state after the application of the Mechanical Stress Improvement Process (MSIP). Strain gages were applied to the inner diameter of the mock-up to record strain changes during the MSIP. These strain readings were used in an attempt to calculate the final stress state of the mock-up as well.

Fredette, Lee F.

2011-07-14T23:59:59.000Z

305

Determination of stress levels for dynamic fracture of oil shale  

Science Journals Connector (OSTI)

The dynamic tensile-stress amplitudes necessary to cause complete spall in unconfined oil-shale samples were experimentally determined in the laboratory...

Michael P. Felix

1977-10-01T23:59:59.000Z

306

Thermal Stress and Reliability for Advanced Power Electronics...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Thermal Stress and Reliability for Advanced Power Electronics and Electric Machines Power Electronic Thermal System Performance and Integration Thermal Performance and...

307

Thermal Stress and Reliability for Advanced Power Electronics...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Performance and Reliability of Bonded Interfaces Physics of Failure of Electrical Interconnects Thermal Stress and Reliability for Advanced Power Electronics and Electric Machines...

308

DOE Cell Component Accelerated Stress Test Protocols for PEM...  

Broader source: Energy.gov (indexed) [DOE]

CELL COMPONENT ACCELERATED STRESS TEST PROTOCOLS FOR PEM FUEL CELLS (Electrocatalysts, Supports, Membranes, and Membrane Electrode Assemblies) March 2007 Fuel cells, especially for...

309

Cell Component Accelerated Stress Test Protocols for PEM Fuel...  

Broader source: Energy.gov (indexed) [DOE]

USCAR FUEL CELL TECH TEAM CELL COMPONENT ACCELERATED STRESS TEST PROTOCOLS FOR PEM FUEL CELLS (Electrocatalysts, Supports, Membranes, and Membrane Electrode Assemblies) Revised May...

310

Drought Stress Response in Enzymatic Activities of Cowpea Nodules  

Science Journals Connector (OSTI)

Summary The response to drought stress of several nodule enzymes in cowpea (Vigna unguiculata (L.) Walp.) cv. IPA 204 at different stages of N2 fixation development, as well as their changes during the period of stress recovery are described. Stress was applied continuously by the control of water potential through a porous cup. Stress applied during the P2 stage (15–30 d) interfered most. The recovery in nodule metabolic activity at the P1 stage (0–15 d) was higher than at other stages. There was a slight reduction in PEPC activity with increased stress. NADH-GOGAT activity was the enzyme most sensitive to drought stress and most closely associated with \\{N2ase\\} (ARA in closed systems). The coupling between GS and NADH-GOGAT activities was lost as drought stress progressed. GDH activity remained not only insensitive to the stress but its activity even increased, indicating that cowpea nodules maintain sufficient activity of some assimilatory enzymes under drought stress.

M.V.B. Figueiredo; H.A. Burity; F.P. De França

1999-01-01T23:59:59.000Z

311

Measuring depth profiles of residual stress with Raman spectroscopy  

SciTech Connect (OSTI)

Knowledge of the variation of residual stress is a very important factor in understanding the properties of machined surfaces. The nature of the residual stress can determine a part`s susceptibility to wear deformation, and cracking. Raman spectroscopy is known to be a very useful technique for measuring residual stress in many materials. These measurements are routinely made with a lateral resolution of 1{mu}m and an accuracy of 0.1 kbar. The variation of stress with depth; however, has not received much attention in the past. A novel technique has been developed that allows quantitative measurement of the variation of the residual stress with depth with an accuracy of 10nm in the z direction. Qualitative techniques for determining whether the stress is varying with depth are presented. It is also demonstrated that when the stress is changing over the volume sampled, errors can be introduced if the variation of the stress with depth is ignored. Computer aided data analysis is used to determine the depth dependence of the residual stress.

Enloe, W.S.; Sparks, R.G.; Paesler, M.A.

1988-12-01T23:59:59.000Z

312

Microseismicity, stress, and fracture in the Coso geothermal...  

Open Energy Info (EERE)

Microseismicity, stress, and fracture in the Coso geothermal field, California Jump to: navigation, search OpenEI Reference LibraryAdd to library Journal Article: Microseismicity,...

313

The Role of Geochemistry and Stress on Fracture Development and...  

Broader source: Energy.gov (indexed) [DOE]

The Role of Geochemistry and Stress on Fracture Development and Proppant Behavior in EGS Reservoirs Principal Investigator (Joseph Moore) Presenter Name (John McLennan)...

314

Residual Stresses for Structural Analysis and Fatigue Life Prediction...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Analysis and Fatigue Life Prediction in Vehicle Components: Success stories from the High Temperature Materials Laboratory (HTML) User Program Residual Stresses for Structural...

315

Consequences of Prenatal Ethanol Exposure and Maternal Stress on Offspring.  

E-Print Network [OSTI]

??Extensive evidence in humans suggests that exposure to insults during gestation, such as ethanol or maternal stress, can negatively impact the developing fetus in manners… (more)

Staples, Miranda

2014-01-01T23:59:59.000Z

316

Water, Light and Heat Stress Effects on Fremont Cottonwood Photosynthesis.  

E-Print Network [OSTI]

?? Seedlings of Fremont cottonwood (Populus fremontii), a California native riparian foundation species, are vulnerable to water stress from rapid water-table declines and the interactions… (more)

Tozzi, Emily Sharp

2011-01-01T23:59:59.000Z

317

Thin Silicon MEMS Contact-Stress Sensor  

SciTech Connect (OSTI)

This thin, MEMS contact-stress (CS) sensor continuously and accurately measures time-varying, solid interface loads in embedded systems over tens of thousands of load cycles. Unlike all other interface load sensors, the CS sensor is extremely thin (< 150 {micro}m), provides accurate, high-speed measurements, and exhibits good stability over time with no loss of calibration with load cycling. The silicon CS sensor, 5 mm{sup 2} and 65 {micro}m thick, has piezoresistive traces doped within a load-sensitive diaphragm. The novel package utilizes several layers of flexible polyimide to mechanically and electrically isolate the sensor from the environment, transmit normal applied loads to the diaphragm, and maintain uniform thickness. The CS sensors have a highly linear output in the load range tested (0-2.4 MPa) with an average accuracy of {+-} 1.5%.

Kotovsky, J; Tooker, A; Horsley, D

2010-03-22T23:59:59.000Z

318

Adjustable shear stress erosion and transport flume  

DOE Patents [OSTI]

A method and apparatus for measuring the total erosion rate and downstream transport of suspended and bedload sediments using an adjustable shear stress erosion and transport (ASSET) flume with a variable-depth sediment core sample. Water is forced past a variable-depth sediment core sample in a closed channel, eroding sediments, and introducing suspended and bedload sediments into the flow stream. The core sample is continuously pushed into the flow stream, while keeping the surface level with the bottom of the channel. Eroded bedload sediments are transported downstream and then gravitationally separated from the flow stream into one or more quiescent traps. The captured bedload sediments (particles and aggregates) are weighed and compared to the total mass of sediment eroded, and also to the concentration of sediments suspended in the flow stream.

Roberts, Jesse D. (Carlsbad, NM); Jepsen, Richard A. (Carlsbad, NM)

2002-01-01T23:59:59.000Z

319

Neuroendocrine mechanisms for immune system regulation during stress in fish  

Science Journals Connector (OSTI)

Abstract In the last years, the aquaculture crops have experienced an explosive and intensive growth, because of the high demand for protein. This growth has increased fish susceptibility to diseases and subsequent death. The constant biotic and abiotic changes experienced by fish species in culture are challenges that induce physiological, endocrine and immunological responses. These changes mitigate stress effects at the cellular level to maintain homeostasis. The effects of stress on the immune system have been studied for many years. While acute stress can have beneficial effects, chronic stress inhibits the immune response in mammals and teleost fish. In response to stress, a signaling cascade is triggered by the activation of neural circuits in the central nervous system because the hypothalamus is the central modulator of stress. This leads to the production of catecholamines, corticosteroid-releasing hormone, adrenocorticotropic hormone and glucocorticoids, which are the essential neuroendocrine mediators for this activation. Because stress situations are energetically demanding, the neuroendocrine signals are involved in metabolic support and will suppress the “less important” immune function. Understanding the cellular mechanisms of the neuroendocrine regulation of immunity in fish will allow the development of new pharmaceutical strategies and therapeutics for the prevention and treatment of diseases triggered by stress at all stages of fish cultures for commercial production.

Gino Nardocci; Cristina Navarro; Paula P. Cortés; Mónica Imarai; Margarita Montoya; Beatriz Valenzuela; Pablo Jara; Claudio Acuña-Castillo; Ricardo Fernández

2014-01-01T23:59:59.000Z

320

Stresses generated in cooling viscoelastic ice shells: Application to Europa  

E-Print Network [OSTI]

Stresses generated in cooling viscoelastic ice shells: Application to Europa F. Nimmo Department to cooling and the expansion of the shell due to the ice-water volume change. The former effect generates Citation: Nimmo, F. (2004), Stresses generated in cooling viscoelastic ice shells: Application to Europa, J

Nimmo, Francis

Note: This page contains sample records for the topic "von mises stress" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

Thermally Induced Stresses in Functionally Graded Thick Tubes  

E-Print Network [OSTI]

thermal barrier coating for high temperature applications, a discrete layer of ceramic material is bondedThermally Induced Stresses in Functionally Graded Thick Tubes Senthil S. Vel and Rajeev Baskiyar method to obtain the temperature, displacements and thermal stresses. In addition to the thermal

Vel, Senthil

322

Dog-eat-dog stress found in animals National Post  

E-Print Network [OSTI]

reproduce in large numbers, and they carry high levels of stress hormones along with low levels of energy. "The question is, do they know it? Do they know that after the peak [in hare numbers] the tide stress-hormone levels. They lacked the energy to fly well. Sparrows with only moderate problems

Zanette, Liana

323

Active control of underground stresses through rock pressurization  

SciTech Connect (OSTI)

To significantly increase the stability of underground excavations while exploiting the full advantages of confined rock strength, methods must be developed to actively control the distribution of stresses near the excavation. This US Bureau of Mines study examines theoretical and practical aspects of rock pressurization, an active stress control concept that induces compressive stress in the wall rock through repeated hydraulic fracturing with a settable fluid. Numerical analyses performed by incorporating the rock pressurization concept into a variety of boundary-element models indicate that rock pressurization has the potential to improve underground excavation stability in three ways: (1) by relocating stress concentrations away from the weak opening surface to stronger, confined wall rock; (2) by inducing additional stresses in a biaxial stress field to reduce the difference between the principal stress components near the surface of the opening, and (3) by counteracting the tensile stresses induced in the rock around internally loaded openings. Practical aspects of the rock pressurization concept were investigated through a series of hydraulic fracturing experiments. The use of sulfur as a settable fluid for hydraulic fracturing was demonstrated, although problems related to sulfur viscosity suggest that other molten materials, such as wax, may be better suited to practical field application of the rock pressurization concept.

Vandergrift, T.L.

1995-06-01T23:59:59.000Z

324

Analysing Web-Orchestrations Under Stress Using Uncertainty Profiles  

Science Journals Connector (OSTI)

......research-article Section A ORIGINAL ARTICLES Analysing Web-Orchestrations Under Stress Using Uncertainty...In practice, the responsiveness of a web-service fluctuates with demand; during...effects of stress on an orchestration of web-services; it describes a strategic situation......

Joaquim Gabarro; Maria Serna; Alan Stewart

2014-11-01T23:59:59.000Z

325

Using Rough Sets Theory to predict German Word Stress  

E-Print Network [OSTI]

Using Rough Sets Theory to predict German Word Stress Stefan Rapp Michael Jessen Grzegorz Dogil 14 Rough Set Theory [Paw82, Paw91] is a framework for reasonably deal­ ing with imprecise or uncertain data application of a Rough Set based machine learning algorithm is presented that can predict german word stress

Reyle, Uwe

326

Effect of 1-MCP on Cotton Plants Under Abiotic Stress  

E-Print Network [OSTI]

to stress conditions (heat and drought) and 1-MCP treatment at the seven-true-leaf stage. The heat stress study consisted of two 1-MCP rates (0 and 10 g a.i. ha-1) and two temperature regimes (optimum temperature: 30/20 ºC (day/night temperature) and high...

Chen, Yuan

2013-05-06T23:59:59.000Z

327

Mathematical Modeling of Stress Fiber Reorganization Induced by Cyclic Stretch  

E-Print Network [OSTI]

patterns of strain. There is much evidence that cyclic uniaxial strain results in a perpendicular orientation of ECs and their stress fibers, while no such alignment occurs in response to cyclic equaibiaxial stretch. It is unclear how cells and their stress...

Hsu, Hui-Ju

2010-01-14T23:59:59.000Z

328

Heat Stress Creates Many Challenges for Milk Producers  

E-Print Network [OSTI]

Heat Stress Creates Many Challenges for Milk Producers There are a variety of factors that can influence a cow's milk production. In Texas, two of these factors are heat stress and reproduction. External heat accumulates from solar radiation, high ambient air temperature, and high relative humidity

329

Secretary Chu Stresses Global Cooperation on Energy, Economic and Climate  

Broader source: Energy.gov (indexed) [DOE]

Stresses Global Cooperation on Energy, Economic and Stresses Global Cooperation on Energy, Economic and Climate Challenges in Talks with World Energy Ministers Secretary Chu Stresses Global Cooperation on Energy, Economic and Climate Challenges in Talks with World Energy Ministers March 13, 2009 - 12:00am Addthis Washington, DC - In recent discussions with a broad range of world energy ministers, U.S. Energy Secretary Steven Chu has stressed the need for global cooperation on energy, economic and climate challenges. Over the past several weeks, Secretary Chu's dialogue with representatives of both energy producing and consuming nations has reinforced the Obama Administration's commitment to energy independence and stressed the shared opportunities to create jobs and boost the global economy through energy

330

Correlation of ultraviolet-induced stress changes and negative index growth in type IIa germanosilicate waveguide gratings  

Science Journals Connector (OSTI)

The stress anisotropy in planar germanosilicate waveguides is used to follow the changes in stress, measured as a birefringence, with UV irradiation. Compressive stress increases...

Canning, J; Åslund, M

1999-01-01T23:59:59.000Z

331

Lipocalin 2 regulation by thermal stresses: Protective role of Lcn2/NGAL against cold and heat stresses  

SciTech Connect (OSTI)

Environmental temperature variations are the most common stresses experienced by a wide range of organisms. Lipocalin 2 (Lcn2/NGAL) is expressed in various normal and pathologic conditions. However, its precise functions have not been fully determined. Here we report the induction of Lcn2 by thermal stresses in vivo, and its role following exposure to cold and heat stresses in vitro. Induction of Lcn2 in liver, heart and kidney was detected by RT-PCR, Western blot and immunohistochemistry following exposure of mice to heat and cold stresses. When CHO and HEK293T cells overexpressing NGAL were exposed to cold stress, cell proliferation was higher compared to controls. Down-regulatrion of NGAL by siRNA in A549 cells resulted in less proliferation when exposed to cold stress compared to control cells. The number of apoptotic cells and expression of pro-apoptotic proteins were lower in the NGAL overexpressing CHO and HEK293T cells, but were higher in the siRNA-transfected A549 cells compared to controls, indicating that NGAL protects cells against cold stress. Following exposure of the cells to heat stress, ectopic expression of NGAL protected cells while addition of exogenous recombinant NGAL to the cell culture medium exacerbated the toxicity of heat stress specially when there was low or no endogenous expression of NGAL. It had a dual effect on apoptosis following heat stress. NGAL also increased the expression of HO-1. Lcn2/NGAL may have the potential to improve cell proliferation and preservation particularly to prevent cold ischemia injury of transplanted organs or for treatment of some cancers by hyperthermia.

Roudkenar, Mehryar Habibi, E-mail: roudkenar@ibto.ir [Research Center, Iranian Blood Transfusion Organization, Tehran (Iran, Islamic Republic of); Halabian, Raheleh [Research Center, Iranian Blood Transfusion Organization, Tehran (Iran, Islamic Republic of)] [Research Center, Iranian Blood Transfusion Organization, Tehran (Iran, Islamic Republic of); Roushandeh, Amaneh Mohammadi [Department of Anatomy, Faculty of Medicine, Medical University of Tabriz, Tabriz (Iran, Islamic Republic of)] [Department of Anatomy, Faculty of Medicine, Medical University of Tabriz, Tabriz (Iran, Islamic Republic of); Nourani, Mohammad Reza [Chemical Injury Research Center, Baqiyatallah Medical Science University, Tehran (Iran, Islamic Republic of)] [Chemical Injury Research Center, Baqiyatallah Medical Science University, Tehran (Iran, Islamic Republic of); Masroori, Nasser [Research Center, Iranian Blood Transfusion Organization, Tehran (Iran, Islamic Republic of)] [Research Center, Iranian Blood Transfusion Organization, Tehran (Iran, Islamic Republic of); Ebrahimi, Majid [Research Center, Iranian Blood Transfusion Organization, Tehran (Iran, Islamic Republic of) [Research Center, Iranian Blood Transfusion Organization, Tehran (Iran, Islamic Republic of); Chemical Injury Research Center, Baqiyatallah Medical Science University, Tehran (Iran, Islamic Republic of); Nikogoftar, Mahin; Rouhbakhsh, Mehdi; Bahmani, Parisa [Research Center, Iranian Blood Transfusion Organization, Tehran (Iran, Islamic Republic of)] [Research Center, Iranian Blood Transfusion Organization, Tehran (Iran, Islamic Republic of); Najafabadi, Ali Jahanian [Department of Molecular Biology, Pasteur Institute of Iran, Tehran (Iran, Islamic Republic of)] [Department of Molecular Biology, Pasteur Institute of Iran, Tehran (Iran, Islamic Republic of); Shokrgozar, Mohammad Ali [National Cell Bank of Iran, Pasteur institute of Iran, Tehran (Iran, Islamic Republic of)] [National Cell Bank of Iran, Pasteur institute of Iran, Tehran (Iran, Islamic Republic of)

2009-11-01T23:59:59.000Z

332

Twisting and Bending Stress in DNA Minicircles  

E-Print Network [OSTI]

The interplay between bending of the molecule axis and appearance of disruptions in circular DNA molecules, with $\\sim 100$ base pairs, is addressed. Three minicircles with different radii and almost equal content of AT and GC pairs are investigated. The DNA sequences are modeled by a mesoscopic Hamiltonian which describes the essential interactions in the helix at the level of the base pair and incorporates twisting and bending degrees of freedom. Helix unwinding and bubble formation patterns are consistently computed by a path integral method that sums over a large number of molecule configurations compatible with the model potential. The path ensembles are determined, as a function of temperature, by minimizing the free energy of the system. Fluctuational openings appear along the helix to release the stress due to the bending of the molecule backbone. In agreement with the experimental findings, base pair disruptions are found with larger probability in the smallest minicircle of \\textit{66-bps} whose bending angle is $\\sim 6^{o} $. For this minicircle, a sizeable untwisting is obtained with the helical repeat showing a step-like increase at $\\tau =\\,315K$. The method can be generalized to determine the bubble probability profiles of open ends linear sequences.

Marco Zoli

2014-03-25T23:59:59.000Z

333

Threshold Stress Creep Behavior of Alloy 617 at Intermediate Temperatures  

SciTech Connect (OSTI)

Creep of Alloy 617, a solid solution Ni-Cr-Mo alloy, was studied in the temperature range of 1023 K to 1273 K (750 °C to 1000 °C). Typical power-law creep behavior with a stress exponent of approximately 5 is observed at temperatures from 1073 K to 1273 K (800 °C to 1000 °C). Creep at 1023 K (750 °C), however, exhibits threshold stress behavior coinciding with the temperature at which a low volume fraction of ordered coherent y' precipitates forms. The threshold stress is determined experimentally to be around 70 MPa at 1023 K (750 °C) and is verified to be near zero at 1173 K (900 °C)—temperatures directly correlating to the formation and dissolution of y' precipitates, respectively. The y' precipitates provide an obstacle to continued dislocation motion and result in the presence of a threshold stress. TEM analysis of specimens crept at 1023 K (750 °C) to various strains, and modeling of stresses necessary for y' precipitate dislocation bypass, suggests that the climb of dislocations around the y' precipitates is the controlling factor for continued deformation at the end of primary creep and into the tertiary creep regime. As creep deformation proceeds at an applied stress of 121 MPa and the precipitates coarsen, the stress required for Orowan bowing is reached and this mechanism becomes active. At the minimum creep rate at an applied stress of 145 MPa, the finer precipitate size results in higher Orowan bowing stresses and the creep deformation is dominated by the climb of dislocations around the y' precipitates.

J.K. Benz; L.J. Carroll; J.K. Wright; R.N. Wright; T. Lillo

2014-06-01T23:59:59.000Z

334

The stresses in the reels of cold reduction mills  

Science Journals Connector (OSTI)

An investigation into the stress distribution in the reels of a cold reduction mill is described. The results indicated that the distribution is nearly axially symmetrical, and it was concluded that Inglis's theory of wire winding might be adapted to give a reasonable approximation of the stresses over the surface of a reel drum in the form of a thick-walled tube. This has been confirmed by the direct measurement of tangential stress in the lap of a coil next to the reel.

R B Sims; J A Place

1953-01-01T23:59:59.000Z

335

E-Print Network 3.0 - alleviating salinity stress Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

the relative sensitivity of the two types of gametes to low-salinity stress. Materials and Methods... was restored to about 32 psu. Salinity stress ... Source: Pechenik,...

336

E-Print Network 3.0 - accelerate tibial stress Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

KNEE REPLACEMENTS Summary: may also affect the contact stresses exerted on the polyethylene tibial insert, thereby influencing... tibial insert contact stresses. The...

337

E-Print Network 3.0 - abiotic stress generates Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Understanding and Improving Salt Tolerance in Plants Summary: and repair under Salinity is one of the major abiotic stresses that ad- salt stress, and their...

338

E-Print Network 3.0 - abiotic stress conditions Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Collection: Environmental Sciences and Ecology 40 7 Synthetic Analysis of the Stress-Gradient Summary: . While it is convenient to refer to environments as stressful, more...

339

E-Print Network 3.0 - abiotic stress tolerance Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

have similar competitive' or stress-tolerant' life histories and the abiotic stress gradient... tolerant and competitive, respectively, competition should be intense at low...

340

E-Print Network 3.0 - alleviates oxidative stress Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

steel and aluminum, the resistance at the maximum stress of a cycle... increased upon load cycling, probably due to oxidation andor strain hardening, and it took more stress......

Note: This page contains sample records for the topic "von mises stress" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

E-Print Network 3.0 - acetazolamide stress brain Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

stress brain Search Powered by Explorit Topic List Advanced Search Sample search results for: acetazolamide stress brain Page: << < 1 2 3 4 5 > >> 1 doi:10.1152...

342

Brain Derived Neurotrophic Factor Modulates Behavioral and Brain Responses to Social Stress.  

E-Print Network [OSTI]

?? Social stress is a prevalent factor in society that can cause or exacerbate neuropsychiatric disorders including depression and posttraumatic stress disorder. According to the… (more)

Jeffress, Elizabeth

2015-01-01T23:59:59.000Z

343

AN ANALYSIS OF THE MEASURED VALUES FOR THE STATE OF STRESS IN THE EARTH'S CRUST  

E-Print Network [OSTI]

Report No. 1-68. Hadley, K. Personal communication.of stress. Fortunately, Hadley (1977) has made an extensiveof stress compiled by Hadley meet these criteria and have

Jamison, Dennis B.; Cook, Neville G.W.

2008-01-01T23:59:59.000Z

344

AN ANALYSIS OF THE MEASURED VALUES FOR THE STATE OF STRESS IN THE EARTH'S CRUST  

E-Print Network [OSTI]

Report No. 1-68. Hadley, K. Personal communication.of stress. Fortunately, Hadley (1977) has made an extensiveof stress compiled by Hadley meet these criteria and have

Cook, Neville G.W.

2010-01-01T23:59:59.000Z

345

E-Print Network 3.0 - air pollution stress Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

stress Search Powered by Explorit Topic List Advanced Search Sample search results for: air pollution stress Page: << < 1 2 3 4 5 > >> 1 Overall Project Description Objectives. A...

346

Stress effect on magnetoimpedance (MI) in amorphous wires at GHz frequencies and application to stress-tunable microwave composite materials  

E-Print Network [OSTI]

The effect of tensile stress on magnetoimpedance (MI) in CoMnSiB amorphous wires at microwave frequencies (0.5-3 GHz) is investigated both experimentally and theoretically. In the presence of the dc bias magnetic field of the order of the anisotropy field, the impedance shows very large and sensitive change when the wire is subjected to a tensile stress: 100% and 60% per 180 MPa for frequencies 500 MHz and 2.5 GHz, respectively. It is demonstrated that this behavior owes mainly to the directional change in the equilibrium magnetization caused by the applied stress and field, which agrees well with the theoretical results for the surface impedance. This stress effect on MI is proposed to use for creating microwave stress-tunable composite materials containing short magnetic wires. The analysis of the dielectric response from such materials shows that depending on the stress level in the material, the dispersion of the effective permittivity can be of a resonant or relaxation type with a considerable change in its values (up to 100% at 600 MPa). This media can be used for structural stress monitoring by microwave contrast imaging.

L. V. Panina; S. I. Sandacci; D. P. Makhnovskiy

2004-11-18T23:59:59.000Z

347

Surveillance Guide - OSS 19.8 Heat Stress  

Broader source: Energy.gov (indexed) [DOE]

HEAT STRESS HEAT STRESS 1.0 Objective The objective of this surveillance is to evaluate the effectiveness of actions taken by the contractor to protect workers from the effects of heat stress. The Facility Representative will observe work where heat stress is a risk and examine implementation of applicable administrative controls. The surveillance provides a basis for evaluating compliance with applicable DOE requirements and implementation of best industry practices. 2.0 References 2.1 DOE 5480.4, Environmental Protection, Safety and Health Protection Standards 2.2 DOE 5483.1A, Occupational Safety and Health Program for DOE Contractor Employees at Government-Owned Contractor- Operated Facilities 2.3 U.S. Environmental Protection Agency, Publication

348

Producing bulk residual stresses in gas turbine blades  

Science Journals Connector (OSTI)

Inhomogeneous plastic strain has been used to produce a pattern of bulk compressive stresses that counteract macrodefect formation and growth in machine components, which increases the working life. Studies ha...

V. A. Boguslaev; A. P. Lopatenko; N. B. Makarenko; N. I. Obodan

1993-02-01T23:59:59.000Z

349

Stress-induced anisotropy in brine saturated shale  

Science Journals Connector (OSTI)

......multistage triaxial tests The anisotropic nature of shales mainly results from the alignment of anisotropic plate-like clay minerals, which...applied differential stress. The shale is moderately anisotropic, with both velocities and anisotropic......

C. Delle Piane; D. N. Dewhurst; A. F. Siggins; M. D. Raven

2011-02-01T23:59:59.000Z

350

Measuring Shear Stress in Microfluidics using Traction Force Microscopy  

Science Journals Connector (OSTI)

Traction force microscopy is a previously-developed method to measure shear forces exerted by biological cells on substrates to which they are adhered (Dembo, 1999). The technique determines the shear stress a...

Bryant Mueller

2011-01-01T23:59:59.000Z

351

Full-Field Stress Measurement From Strain and Load Data  

Science Journals Connector (OSTI)

In experimental mechanics, the possibility of tracking on component surfaces the full-field stress and strain states during deformation, always stimulated the research and the study of new measurement techniqu...

Giovanni B. Broggiato; Luca Cortese

2007-01-01T23:59:59.000Z

352

Stress measurements in rock salt using hydraulic fracturing  

SciTech Connect (OSTI)

Hydraulic fracturing was applied in horizontal drillholes in the Salado salt formation near Carlsbad, New Mexico. Testing took place approximately 650 m below surface in order to support the design of a Waste Isolation Pilot Plant (WIPP) for the disposal of radioactive waste from defense activities of the United States. Hydraulic fracturing was performed primarily to determine whether the virgin in situ stress state at the WIPP site is isotropic and whether the magnitudes of the the virgin in situ stresses correspond to the weight of the overburden. Beyond these limited objectives, measurements are being analyzed to evaluate the usefulness of hydraulic fracturing in salt formations in general. Such measurements are desirable to determine stresses induced by mining and to monitor time-dependent stress changes around underground excavations in salt masses. Hydraulic fracturing measurements are also relevant to the evaluation of allowable pressures before fracturing is induced in pressurized boreholes and storage caverns.

Wawersik, W.R.; Stone, C.M.

1986-01-01T23:59:59.000Z

353

Global buckling behavior of submarine unburied pipelines under thermal stress  

Science Journals Connector (OSTI)

Buckling of submarine pipelines under thermal stress is one of the most important problems to be considered in pipeline design. And pipeline with initial imperfections will easily undergo failure due to global buckling

Lin-ping Guo ???; Run Liu ??; Shu-wang Yan ???

2013-07-01T23:59:59.000Z

354

Coking theory: Internal stress in the coal batch  

Science Journals Connector (OSTI)

The development of local internal stress in the coal batch is analyzed on the basis of ... theoretical and experimental data. Its influence on coke quality is demonstrated. The influence of mineralized ... large ...

V. I. Sukhorukov

2011-09-01T23:59:59.000Z

355

Nondestructive testing using stress waves: wave propagation in layered media  

E-Print Network [OSTI]

The use of stress waves in several civil engineering applications such as nondestructive testing of soil deposits or pavement systems has become extremely popular over the last few years. In all cases, a dynamic impulse is applied to the surface...

Ortega, Jose Alberto

2013-02-22T23:59:59.000Z

356

The “Stress-drop Jet” in Lake Mendota  

Science Journals Connector (OSTI)

This phenomenon seems to be associated with a rapid decrease of wind stress on the lake surface. It is postulated that the energy for this “jet” is stored in the.

357

Stress analysis of aspherical coated particle with inner pressure  

Science Journals Connector (OSTI)

Coated particles used in HTR fuel element sustain the inner pressure during irradiation as a pressure vessel. In actually the coated particle is not real spherical but with some asphericity, the stress distribution in the vessel is not uniform, coated layer in aspherical particle sustain more additional stress due to the asphericity. In this paper, the geometric shape distribution is summarized based on actual coated particle statistic. A mechanical analysis model is proposed for SiC layer by geometric combinations, and stress distribution of coated particle with a flat is calculated. The results show that the local maximum stress of aspherical particle increased two times than that of ideal spherical coated particle, which increase the failure probability under irradiation and high temperature.

Bing Liu; Lin Yang; Tongxiang Liang; Chunhe Tang

2012-01-01T23:59:59.000Z

358

Some Evidence of Colinear Wind Stress and Wave Breaking  

Science Journals Connector (OSTI)

Data collected during the Surface Waves and Processes Program are employed to investigate a possible interrelation between wind stress and surface wave breaking. From comparison of data from 15 half-hour long time segments, the directions of the ...

Karl F. Rieder; Jerome A. Smith; Robert A. Weller

1996-11-01T23:59:59.000Z

359

Tackling Drought Stress: RECEPTOR-LIKE KINASES Present New Approaches  

Science Journals Connector (OSTI)

...mechanisms involved in these processes remain largely unknown. BRs...developmental and stress responses are interrelated in plants via signal integration...fine-tune developmental processes involved in maintaining high...interference with biological processes brings along important advantages...

Alex Marshall; Reidunn B. Aalen; Dominique Audenaert; Tom Beeckman; Martin R. Broadley; Melinka A. Butenko; Ana I. Caño-Delgado; Sacco de Vries; Thomas Dresselhaus; Georg Felix; Neil S. Graham; John Foulkes; Christine Granier; Thomas Greb; Ueli Grossniklaus; John P. Hammond; Renze Heidstra; Charlie Hodgman; Michael Hothorn; Dirk Inzé; Lars �stergaard; Eugenia Russinova; Rüdiger Simon; Aleksandra Skirycz; Yvonne Stahl; Cyril Zipfel; Ive De Smet

2012-06-12T23:59:59.000Z

360

Transformation induced plasticity assisted steels: stress or strain affected martensitic  

E-Print Network [OSTI]

Transformation induced plasticity assisted steels: stress or strain affected martensitic transformation? S. Chatterjee and H. K. D. H. Bhadeshia* Transformation induced plasticity (TRIP) assisted steels contain a small quantity of carbon enriched retained austenite, which transforms into martensite during

Cambridge, University of

Note: This page contains sample records for the topic "von mises stress" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

Anomalous stress diffusion in earthquake triggering: Correlation length, time  

E-Print Network [OSTI]

. This is consistent with a clock advance on the failure time based on the constitutive rules for subcritical crack growth following a transient change in the loading stress. The power law scaling disappears after a few

362

A PROTEOMIC STUDY OF OXIDATIVE STRESS IN ALCOHOLIC LIVER DISEASE  

E-Print Network [OSTI]

to oxidative stress with tert-butyl hydroperoxide (TBHP) contained 17% less carbonylated proteins than the non-fat loaded control. Mass spectrometric analysis of carbonylated proteins indicated that known classical markers of protein carbonylation (e...

Newton, Billy W.

2010-01-16T23:59:59.000Z

363

Stress measurements in glass using shaped-charge jets  

Science Journals Connector (OSTI)

Stresses were measured in glass targets in the vicinity of a penetrating shaped-charge jet. Stress levels of approximately 0.3 \\{GPa\\} were measured 12–20mm away from a jet formed by a 35mm copper liner. High speed framing camera photographs showed that the penetration velocity in the glass was 2.57 km/s and the glass fracture velocity was 2.10 km/s.

William Lawrence; Robert E. Franz

1987-01-01T23:59:59.000Z

364

A study of Macrophomina phaseolina, soybean, and water stress  

E-Print Network [OSTI]

A STUDY OF MACROPHOMINA PHASEOLINA, SOYBEAN, AND WATER STRESS A Thesis by FREDERICK MILTON SHOKES Submitted to the Graduate College of Texas A8cM University in partial fulfillment of the requirement for the degree of MASTER OF SCIENCE... December 1975 Major Subject: Plant Physiology A STUDY OF MACROPHOMINA PHASEOLINA, SOYBEAN, AND WATER STRESS A Thesis by FREDERICK MILTON SHOKES Approved as to style and content by: Co-C irman o Committee o-Chairman o Committee cad artment Member...

Shokes, Frederick Milton

1975-01-01T23:59:59.000Z

365

Stress-dependent permeability on tight gas reservoirs  

E-Print Network [OSTI]

.2 Diffusivity Equation, Liquid Case?????????????.?. 8 2.3 Diffusivity Equation, Gas Case??????????????.?. 9 2.4 Stress-Dependent Formations????????????????. 11 2.5 Linear Flow???????????????????????. 14 2.6 Radial Flow???????????????????????. 14 2... laboratory data is not available. 1.3 Methodology The methodology consists of using both analytical and numerical models of a stress- sensitive formation saturated with irreducible water saturation and gas. The model considers analytical...

Rodriguez, Cesar Alexander

2005-02-17T23:59:59.000Z

366

Method to adjust multilayer film stress induced deformation of optics  

DOE Patents [OSTI]

A buffer-layer located between a substrate and a multilayer for counteracting stress in the multilayer. Depositing a buffer-layer having a stress of sufficient magnitude and opposite in sign reduces or cancels out deformation in the substrate due to the stress in the multilayer. By providing a buffer-layer between the substrate and the multilayer, a tunable, near-zero net stress results, and hence results in little or no deformation of the substrate, such as an optic for an extreme ultraviolet (EUV) lithography tool. Buffer-layers have been deposited, for example, between Mo/Si and Mo/Be multilayer films and their associated substrate reducing significantly the stress, wherein the magnitude of the stress is less than 100 MPa and respectively near-normal incidence (5.degree.) reflectance of over 60% is obtained at 13.4 nm and 11.4 nm. The present invention is applicable to crystalline and non-crystalline materials, and can be used at ambient temperatures.

Mirkarimi, Paul B. (Sunol, CA); Montcalm, Claude (Livermore, CA)

2000-01-01T23:59:59.000Z

367

Opportunities and Challenges for Nondestructive Residual Stress Assessment  

SciTech Connect (OSTI)

For a long time, nondestructive residual stress assessment has been one of the greatest opportunities as well as one of the greatest challenges for the NDE community, and probably it will remain so in the foreseeable future. The most critical issue associated with nondestructive residual stress assessment seems to be that of selectivity. Numerous NDE methods have been found to be sufficiently sensitive to the presence of residual stress, but unfortunately also rather sensitive to other spurious variations that usually accompany residual stresses, such as anisotropic texture, microstructural inhomogeneity, plastic deformation, etc., which could interfere with, or even overshadow, the elastic strain caused by the sought residual stress. The only sufficiently selective NDE method that is more or less immune from these spurious effects is X-ray diffraction measurement, which however does not have the required penetration depth in most applications unless high-energy neutron radiation is used. It is timely for the community to sit back and ask where we are in this important area. This paper presents an overview of the various indirect techniques that have been used to measure residual stress in the past. It is shown that traditional techniques have a number of limitations, which have spurred several recent research programs. Some of the new techniques that are presently being examined in the NDE community are reviewed and the current status of these research efforts is assessed.

Nagy, P. B. [Department of Aerospace Engineering and Engineering Mechanics, University of Cincinnati, Cincinnati, Ohio 45221-0070 (United States)

2006-03-06T23:59:59.000Z

368

A CAVITATION TRACKING METHOD FOR ELASTIC-PLASTIC FLOW IN SOLIDS  

E-Print Network [OSTI]

A CAVITATION TRACKING METHOD FOR ELASTIC-PLASTIC FLOW IN SOLIDS Keh-Ming Shyue Department tracking approach for the numerical simulation of one-dimensional elastic- plastic flow in solids, and the von Mises condition for the elastic-plastic phase change. To characterize the cavitation

Shyue, Keh-Ming

369

Stress Alters Rates and Types of Loss of Heterozygosity in Candida albicans  

Science Journals Connector (OSTI)

...noncommercial use, distribution, and reproduction...Types of Loss of Heterozygosity...stress, heat stress...1999. The distribution of rates...1985. Heat shock induces chromosome loss in the yeast...1949. The distribution of the numbers...types of loss of heterozygosity...stress, heat stress...

A. Forche; D. Abbey; T. Pisithkul; M. A. Weinzierl; T. Ringstrom; D. Bruck; K. Petersen; J. Berman

2011-08-01T23:59:59.000Z

370

AN ANALYSIS OF THE MEASURED VALUES FOR THE STATE OF STRESS IN THE EARTH'S CRUST  

E-Print Network [OSTI]

Jung, R. (1975). Hydraulic Fracturing Stress Measurements,measurement in hydraulic fracturing has been described by

Cook, Neville G.W.

2010-01-01T23:59:59.000Z

371

AN ANALYSIS OF THE MEASURED VALUES FOR THE STATE OF STRESS IN THE EARTH'S CRUST  

E-Print Network [OSTI]

Jung, R. (1975). Hydraulic Fracturing Stress Measurements,measurement in hydraulic fracturing has been described by

Jamison, Dennis B.; Cook, Neville G.W.

2008-01-01T23:59:59.000Z

372

Alpha-ketoglutarate dehydrogenase: a target and generator of oxidative stress  

Science Journals Connector (OSTI)

...dehydrogenase: a target and generator of oxidative stress Laszlo...therefore could contribute to the induction of oxidative stress. This...nitration. 2. alpha-KGDH as a generator of oxidative stress It is...dehydrogenase: a target and generator of oxidative stress. | Alpha-ketoglutarate...

2005-01-01T23:59:59.000Z

373

Stress and Child Development VOL. 24 / NO. 1 / SPRING 2014 41  

E-Print Network [OSTI]

of the developing brain and other biological systems, the neurobio- logical response to chronic stress can

374

Influence of target structure on film stress in WTi sputtering  

SciTech Connect (OSTI)

In this report, the effect of sputtering target microstructure on the deposited film stress was investigated. By controlling the metallurgical process, two types of W-10wt%Ti target constituents, namely single-phase and multiple-phase WTi, were prepared. The former one was composed of W-rich ({beta}Ti,W) phase only, the latter one was with W, W-rich ({beta}Ti,W) and Ti-rich ({beta}Ti,W) phases. The stress of the films deposited on 12.7 cm diameter silicon oxide wafers from the single-phase target tends to be more compressive than that from the multiple-phase target. By increasing wafer temperature, the compressive stress was linearly decreased. In addition, the level of film stress was also affected by the film thickness and other sputtering parameters. To understand the causes for the differences in film stress between the multiple-phase and single-phase derived films, an evaluation of the film structure using a field-emission scanning electron microscope (FE-SEM) and mechanical testing using a nano-indentation instrument were performed. Finer domains with denser laminar structure were observed on the films deposited from the single-phase target. However, no significant difference in mechanical properties was found between these two from the nano-indentation measurements. It is envisioned that the more uniform solid solution between the W and Ti in the films obtained by sputtering the single-phase targets generates a higher compressive stress when deposited on the silicon oxide wafers resulting in a higher compressive stress.

Lo, C.F.; Wang, H.; Gilman, P. [Materials Research Corp., Orangeburg, NY (United States)

1998-12-31T23:59:59.000Z

375

The importance of in-situ-stress profiles in hydraulic-fracturing applications  

SciTech Connect (OSTI)

In-situ stresses define the local forces acting on lithologic layers in the subsurface. Knowledge of these stresses is important in drilling, wellbore-stability, and, especially, hydraulic-fracturing applications. The measurement of in-situ stress is not straightforward and, therefore, often goes unmeasured. As such, one often assumes values of in-situ stress or estimate in-situ stresses from logging parameters. This article illustrates the importance of in-situ-stress estimates as they relate to hydraulic fracturing and outlines several techniques for estimating in-situ-stress magnitudes.

Hopkins, C.W. [S.A. Holditch and Associates, Inc., Houston, TX (United States). Houston Div.

1997-09-01T23:59:59.000Z

376

Temporal and spatial patterns in wind stress and wind stress curl over the central Southern California Bight  

Science Journals Connector (OSTI)

In 2001, the U.S. Geological Survey, together with several other federal and municipal agencies, began a series of field programs to determine along and cross-shelf transport patterns over the continental shelves in the central Southern California Bight. As a part of these programs, moorings that monitor winds were deployed off the Palos Verdes peninsula and within San Pedro Bay for six 3–4 month summer and winter periods between 2001 and 2008. In addition, nearly continuous records of winds for this 7-year period were obtained from a terrestrial site at the coast and from a basin site offshore of the long-term coastal site. The mean annual winds are downcoast at all sites. The alongshelf components of wind stress, which are the largest part of the low-frequency wind stress fields, are well correlated between basin, shelf and coastal sites. On average, the amplitude of alongshelf fluctuations in wind stress are 3–4 times larger over the offshore basin, compared to the coastal site, irrespective of whether the fluctuations represent the total, or just the correlated portion of the wind stress field. The curl in the large-scale wind stress tends to be positive, especially in the winter season when the mean wind stress is downcoast and larger at the offshore basin site than at the beach. However, since the fluctuation in wind stress amplitudes are usually larger than the mean, periods of weak negative curl do occur, especially in the summer season when the largest normalized differences in the amplitude of wind stress fluctuations are found in the nearshore region of the coastal ocean. Even though the low-frequency wind stress field is well-correlated over the continental shelf and offshore basins, out to distances of 35 km or more from the coast, winds even 10 km inshore of the beach do not represent the coastal wind field, at least in the summer months. The seasonal changes in the spatial structures in wind stress amplitudes suggest that an assessment of the amplitude of the responses of coastal ocean processes to wind forcing is complex and that the responses may have significant seasonal structures.

Marlene A. Noble; Kurt J. Rosenberger; Leslie K. Rosenfeld; George L. Robertson

2012-01-01T23:59:59.000Z

377

Overpressure prediction by mean total stress estimate using well logs for compressional environments with strike-slip or reverse faulting stress state  

E-Print Network [OSTI]

-dimensional compaction theory and depend on a relationship between porosity and vertical effective stress. Strike-slip or reverse faulting environments especially require a different way to determine pore-pressure, since the overburden is not the maximum stress...

Ozkale, Aslihan

2007-04-25T23:59:59.000Z

378

Connecting local active forces to macroscopic stress in elastic media  

E-Print Network [OSTI]

In contrast with ordinary materials, living matter drives its own motion by generating active, out-of-equilibrium internal stresses. These stresses typically originate from localized active elements embedded in an elastic medium, such as molecular motors inside the cell or contractile cells in a tissue. While many large-scale phenomenological theories of such active media have been developed, a systematic understanding of the emergence of stress from the local force-generating elements is lacking. In this paper, we present a rigorous theoretical framework to study this relationship. We show that the medium's macroscopic active stress tensor is equal to the active elements' force dipole tensor per unit volume in both continuum and discrete linear homogeneous media of arbitrary geometries. This relationship is conserved on average in the presence of disorder, but can be violated in nonlinear elastic media. Such effects can lead to either a reinforcement or an attenuation of the active stresses, giving us a glimpse of the ways in which nature might harness microscopic forces to create active materials.

Pierre Ronceray; Martin Lenz

2014-11-12T23:59:59.000Z

379

Import von Adressbchern und Verteilerlisten Autor: Tim Frodermann; CIP-Pool der Philosophischen Fakultt III; http://www.cip.phil3.uni-wuerzburg.d; Stand dieser Dokumentation: 02.  

E-Print Network [OSTI]

Import von Adressbüchern und Verteilerlisten Autor: Tim Frodermann; CIP-Pool der Philosophischen Fakultät III; http://www.cip.phil3.uni-wuerzburg.d; Stand dieser Dokumentation: 02. November 2004 Bevor Frodermann; CIP-Pool der Philosophischen Fakultät III; http://www.cip.phil3.uni-wuerzburg.d; Stand dieser

Rossak, Wilhelm R.

380

Researchers Devise New Stress Test for Irradiated Materials | Department of  

Broader source: Energy.gov (indexed) [DOE]

Researchers Devise New Stress Test for Irradiated Materials Researchers Devise New Stress Test for Irradiated Materials Researchers Devise New Stress Test for Irradiated Materials July 20, 2011 - 3:58pm Addthis Scientists conducted compression tests of copper specimens irradiated with high-energy protons, designed to model how damage from radiation affects the mechanical properties of copper. By using a specialized in situ mechanical testing device in a transmission electron microscope at the National Center for Electron Microscopy, the team could examine — with nanoscale resolution — the localized nature of this deformation. | Courtesy of Lawrence Berkeley National Laboratory Scientists conducted compression tests of copper specimens irradiated with high-energy protons, designed to model how damage from radiation affects

Note: This page contains sample records for the topic "von mises stress" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

Spray Shadowing For Stress Relief And Mechanical Locking In Thick  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Advanced Materials » Advanced Materials » Spray Shadowing For Stress Relief And Mechanical Locking Spray Shadowing For Stress Relief And Mechanical Locking In Thick Protective Coatings A method for applying a protective coating on an article. Available for thumbnail of Feynman Center (505) 665-9090 Email Spray Shadowing For Stress Relief And Mechanical Locking In Thick Protective Coatings A method for applying a protective coating on an article, comprising the following steps: selecting an article with a surface for applying a coating thickness; creating undercut grooves on the article, where the grooves depend beneath the surface to a bottom portion with the grooves having an upper width on the surface and a lower width on the bottom portion connected by side walls, where at least one of the side walls connects the

382

Develop baseline computational model for proactive welding stress  

Broader source: Energy.gov (indexed) [DOE]

Develop baseline computational model for proactive welding stress Develop baseline computational model for proactive welding stress management to suppress helium induced cracking during weld repair Develop baseline computational model for proactive welding stress management to suppress helium induced cracking during weld repair There are over 100 nuclear power plants operating in the U.S., which generate approximately 20% of the nation's electricity. These plants range from 15 to 40 years old. Extending the service lives of the current fleet of nuclear power plants beyond 60 years is imperative to allow for the environmentally-sustainable energy infrastructure being developed and matured. Welding repair of irradiated nuclear reactor materials (such as austenitic stainless steels) is especially challenging because of the

383

Quantification of residual stress from photonic signatures of fused silica  

SciTech Connect (OSTI)

A commercially available grey-field polariscope (GFP) instrument for photoelastic examination is used to assess impact damage inflicted upon the outer-most pane of Space Shuttle windows made from fused silica. A method and apparatus for calibration of the stress-optic coefficient using four-point bending is discussed. The results are validated on known material (acrylic) and are found to agree with literature values to within 6%. The calibration procedure is then applied to fused-silica specimens and the stress-optic coefficient is determined to be 2.43 ± 0.54 × 10{sup ?12} Pa{sup ?1}. Fused silica specimens containing impacts artificially made at NASA’s Hypervelocity Impact Technology Facility (HIT-F), to simulate damage typical during space flight, are examined. The damage sites are cored from fused silica window carcasses and examined with the GFP. The calibrated GFP measurements of residual stress patterns surrounding the damage sites are presented.

Cramer, K. Elliott; Yost, William T. [NASA Langley Research Center, Hampton, VA 23681 (United States); Hayward, Maurice [College of William and Mary, Williamsburg, VA 23185 (United States)

2014-02-18T23:59:59.000Z

384

Fracture Toughness and Maximum Stress in a Disordered Lattice System  

E-Print Network [OSTI]

Fracture in a disordered lattice system is studied. In our system, particles are initially arranged on the triangular lattice and each nearest-neighbor pair is connected with a randomly chosen soft or hard Hookean spring. Every spring has the common threshold of stress at which it is cut. We make an initial crack and expand the system perpendicularly to the crack. We find that the maximum stress in the stress-strain curve is larger than those in the systems with soft or hard springs only (uniform systems). Energy required to advance fracture is also larger in some disordered systems, which indicates that the fracture toughness improves. The increase of the energy is caused by the following two factors. One is that the soft spring is able to hold larger energy than the hard one. The other is that the number of cut springs increases as the fracture surface becomes tortuous in disordered systems.

Chiyori Urabe; Shinji Takesue

2008-12-29T23:59:59.000Z

385

Tensile-stressed microelectromechanical apparatus and microelectromechanical relay formed therefrom  

DOE Patents [OSTI]

A microelectromechanical (MEM) apparatus is disclosed which includes a shuttle suspended above a substrate by two or more sets of tensile-stressed beams which are operatively connected to the shuttle and which can comprise tungsten or a silicon nitride/polysilicon composite structure. Initially, the tensile stress in each set of beams is balanced. However, the tensile stress can be unbalanced by heating one or more of the sets of beams; and this can be used to move the shuttle over a distance of up to several tens of microns. The MEM apparatus can be used to form a MEM relay having relatively high contact and opening forces, and with or without a latching capability.

Fleming, James G. (Albuquerque, NM)

2008-03-04T23:59:59.000Z

386

Thermal stress on bottom hole rock of gas drilling  

Science Journals Connector (OSTI)

Gas drilling has higher penetration than mud drilling. The greatest reason for this phenomenon with gas is that the gas is greatly cooled by expansion as it passes through the bit and thereby cools the bottom of the hole. The thermal stress at bottom-hole occurs during this process. The concept of thermal crushing of rocks is analysed in this study. The theoretical methods are developed to analyse thermal stresses and fragmentation induced by cooling of rock. Then, the numerical computation is conducted for the thermal stress equations with the numerical result simulated for the temperature field at the bottom hole to explain the reason of high drilling rates in gas drilling. Furthermore, an experiment was conducted to verify the theory. Therefore, the theories and simulated results in this paper have a guiding signification for best understand the technique and possibly to extend its economic advantage still further. [Received: September 23, 2011; Accepted: November 20, 2011

Shunji Yang; Gonghui Liu; Jun Li

2012-01-01T23:59:59.000Z

387

Researchers Devise New Stress Test for Irradiated Materials | Department of  

Broader source: Energy.gov (indexed) [DOE]

Researchers Devise New Stress Test for Irradiated Materials Researchers Devise New Stress Test for Irradiated Materials Researchers Devise New Stress Test for Irradiated Materials July 20, 2011 - 3:58pm Addthis Scientists conducted compression tests of copper specimens irradiated with high-energy protons, designed to model how damage from radiation affects the mechanical properties of copper. By using a specialized in situ mechanical testing device in a transmission electron microscope at the National Center for Electron Microscopy, the team could examine — with nanoscale resolution — the localized nature of this deformation. | Courtesy of Lawrence Berkeley National Laboratory Scientists conducted compression tests of copper specimens irradiated with high-energy protons, designed to model how damage from radiation affects

388

Computational Core | VIMSS - Virtual Institute for Microbial Stress and  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Cloning of Identified Pathways Cloning of Identified Pathways Functional Genomics The goal of the Functional Genomics Core is to develop the experimental methods to elucidate the regulatory networks in the stress responses of Desulfovibrio vulgaris, Shewanella oneidensi, and Geobacter metallireducens. Specifically, we propose to: use existing DNA arrays for S. oneidensis, and to develop DNA arrays for D. vulgaris and G. metallireducens to measure the transcript profile (transcriptome) during the response to various environmental stresses; use HPLC-MS-MS to measure the protein profile (proteome) of D. vulgaris, G. metallireducens, and S. oneidensis during the response to various environmental stresses; measure the metabolite profile (metabolome) of D. vulgaris, G. metallireducens, and S. oneidensis during the response to various

389

VIMSS - Virtual Institute for Microbial Stress and Survival  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

featuredproject ESPP222 Environmental Stress Pathway Project (ESPP2) formerly known as Rapid Deduction of Stress Response Pathways in Metal/Radionuclide Reducing Bacteria Adam Arkin, co-Principal Investigator (LBNL, Physical Biosciences Division) and Terry Hazen, co-Principal Investigator (LBNL, Earth Sciences Division) ESPP2 is developing computational models that describe and predict the behavior of gene regulatory networks in microbes in response to the environmental conditions found in DOE waste sites. The research takes place within the Virtual Institute for Microbial Stress and Survival (VIMSS). >> More about ESPP2 >> View all projects featured project desufovibrio microbesonline.com MicrobesOnline is designed specifically to facilitate comparative studies on prokaryotic genomes.

390

Stress intensity factors for small fatigue cracks in tubular joints  

SciTech Connect (OSTI)

Some simple fracture mechanics models are presented for estimating stress intensity factors for small surface fatigue cracks in welded tubular joints. Model predictions are compared with large-scale experimental results for the cases of in-plane and out-of-plane bending in multi-brace tubular nodes. It is demonstrated that reasonably accurate predictions of the stress intensity factor are possible using a modified flat plate solution if the effects of weld geometry, load shedding and crack shape are adequately accounted for.

Monahan, C.C. [Memorial Univ. of Newfoundland, St. Johns, Newfoundland (Canada). Centre for Cold Ocean Resources Engineering; Dover, W.D. [University College, London (United Kingdom)

1995-12-31T23:59:59.000Z

391

A micromechanics model for environmental stress corrosion in GFRP  

Science Journals Connector (OSTI)

Understanding the mechanisms of environmental stress corrosion is very important for assessing the durability and damage tolerance predictions of composites using glass as the main reinforcement. A mechanistic model describing these mechanisms for unidirectional GFRP in tension is described. The model is based both on the chemical behaviour of glass, and in particular that of glass flaws, and on more recent models of stress corrosion. These were combined with fracture mechanics, the shear lag theory, and a probability model for flaw size. The results are very encouraging. The model shows that it is possible to obtain mechanisms of GFRP breakdown, which corresponds to observed experimental behaviour.

Amar Khennane; Robert E. Melchers

2003-01-01T23:59:59.000Z

392

An investigation of residual stress in welded joints  

E-Print Network [OSTI]

not extended beyond eight days time~ therefore the curve does not show com- plete relaxation of stress v!ith age of weld. However the figures "or the longitudinal stress compare favorably with that calculated by Houlton and iiartin (1) of 55, 000 psi... are bolted or doweled to a heavy cast iron or steel frame as shown which is of sufficient rigidity that all of the strain takes place in the specimen. The weld and the strain gage are separated sufficiently and the area between may be water cooled so II...

Moffat, William Hugh

1951-01-01T23:59:59.000Z

393

Gauge Invariant Effective Stress-Energy Tensors for Gravitational Waves  

E-Print Network [OSTI]

It is shown that if a generalized definition of gauge invariance is used, gauge invariant effective stress-energy tensors for gravitational waves and other gravitational perturbations can be defined in a much larger variety of circumstances than has previously been possible. In particular it is no longer necessary to average the stress-energy tensor over a region of spacetime which is larger in scale than the wavelengths of the waves and it is no longer necessary to restrict attention to high frequency gravitational waves.

Paul R. Anderson

1996-09-09T23:59:59.000Z

394

Accelerated Stress Testing, Qualification Testing, HAST, Field Experience  

Broader source: Energy.gov [DOE]

This presentation, which was the opening session of the NREL 2013 Photovoltaic Module Reliability Workshop held on February 26, 2013 in Golden, CO, was presented by John Wohlgemuth. Entitled "Accelerated Stress Testing, Qualification Testing, HAST, Field Experience -- What Do They All Mean?" the presentation details efforts to develop accelerated stress tests beyond the qualification test levels, which are necessary to predict PV module wear-out. The commercial success of PVs is ultimately based on the long-term reliability and safety of the deployed PV modules.

395

Physics-Based Stress Corrosion Cracking Component Reliability  

Broader source: Energy.gov (indexed) [DOE]

Physics-Based Stress Corrosion Physics-Based Stress Corrosion Cracking Component Reliability Model cast in an R7-Compatible Cumulative Damage Framework Draft Report Supporting Technology Inputs to the Risk- Informed Safety Margin Characterization Pathway of the DOE Light Water Reactor Sustainability Program Stephen D. Unwin Kenneth I. Johnson Robert F. Layton Peter P. Lowry Scott E. Sanborn Mychailo B. Toloczko PNNL-20596 July 2011 Physics-Based SCC Reliability Model in a Cumulative Damage Framework 2 Physics-Based SCC Reliability Model in a Cumulative Damage Framework 3 Table of Contents Executive Summary............................................................................... 4 1. Introduction .......................................................................... 5

396

Schalten von Motoren  

Science Journals Connector (OSTI)

Motoren für Gleich- oder Wechselstrom nehmen beim Anschalten ihrer Wicklung an die konstante Spannung eines Verteilungsnetzes nicht sprunghaft ihre volle, stationäre Drehzahl an, sondern laufen vom Stillstand ...

…

1923-01-01T23:59:59.000Z

397

Schalten von Motoren  

Science Journals Connector (OSTI)

Motoren für Gleich- oder Wechselstrom nehmen beim Anschalten ihrer Wicklung an die konstante Spannung eines Verteilungsnetzes nicht sprunghaft ihre volle, stationäre Drehzahl an, sondern laufen vom Stillstand ...

…

1926-01-01T23:59:59.000Z

398

Wirkung von Schwungmassen  

Science Journals Connector (OSTI)

Motoren für Gleich- oder Wechselstrom nehmen beim Anschalten ihrer Wicklung an die konstante Spannung eines Verteilungsnetzes nicht sprunghaft ihre volle, stationäre Drehzahl an, sondern laufen vom Stillstand ...

…

1953-01-01T23:59:59.000Z

399

Von der Nutzung  

Science Journals Connector (OSTI)

„Hier ruht F. J. Sorg, Luitnant-Kolonel der Infanterie, gefallen im Jahre 1850 im Kampf gegen die Aufständischen.“ —

Karl Helbig

1949-01-01T23:59:59.000Z

400

Stammzelltransplantation: Vorhersage von Komplikationen  

E-Print Network [OSTI]

Kapilarelektorphorese ESI-TOF Kaiser et al., Electrophoresis 2004 #12;ANALYSE: A ROHDATEN: B peak list: C Datenverarbeitung: #12;CE-MS Analyse Daten Verarbeitung MosaVisu Kalibierung mit ProteinCluster auf SQL-Server ID ,,Protein Liste" Kalibrierte ,,protein list" ID Liste Vordefinierte Biomarker Probenvorbereitung

Manstein, Dietmar J.

Note: This page contains sample records for the topic "von mises stress" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

Beispiele von Produktionszellen  

Science Journals Connector (OSTI)

In einem Montagesystem sind meist mehrere Tätigkeiten bzw. Prozesse erforderlich um den gewünschten Montagefortschritt zu erzielen.

Peter Konold; Herbert Reger

1997-01-01T23:59:59.000Z

402

Feinplanung von Montagesystemen  

Science Journals Connector (OSTI)

Komplexe Automatisierungslösungen und veränderte Gerätetechnik führen zu einer wachsenden Datenmenge. Technische Datenbanken gewinnen deshalb weiter an Bedeutung. Technische Betriebsmitteldaten, einschließlich...

Prof. Dr.-Ing. Klaus Feldmann

1992-01-01T23:59:59.000Z

403

Abkehr von fossilen Brennstoffen  

Science Journals Connector (OSTI)

Ein Kalifornier verbraucht im Schnitt rund 40 Prozent weniger an Energie als der Durchschnittsamerikaner. Der Energieverbrauch pro Kopf ist in Kalifornien in den letzten Jahren konstant geblieben, während er i...

Richard Watson

2014-01-01T23:59:59.000Z

404

Berechnungsgrundlagen von Kolbenkompressoren  

Science Journals Connector (OSTI)

Um die Hauptabmessungen eines Kompressors und dessen Leistungsbedarf berechnen zu können, müssen für das gewählte Kältemittel die gewünschte Kälteleistung Q 0 und die Betriebsverhältnisse, insbesond...

Dr.-Ing. K. Linge

1966-01-01T23:59:59.000Z

405

Residual stress profiles for mitigating fretting fatigue in gas turbine engine disks  

Science Journals Connector (OSTI)

The driving force for fretting fatigue in engine disks is the contact stresses generated by fretting of the blade and the disk surfaces in the attachment region. This paper examines the use of different residual compressive stress profiles to counteract the undesirable effects of contact stresses and to mitigate fretting fatigue. A global finite-element analysis of the disk blade assembly is first performed. The contact pressure and shear traction at the attachment region are extracted from the FEM results and used to compute the contact stress distribution. The contact stresses are then combined with the residual stresses and the bulk stresses. The overall stress distribution is then utilized in a probabilistic crack growth model to predict the risk of disk failure for a military engine under simulated loading conditions. The results are used to identify the minimum residual stress profile for mitigating fretting fatigue in engine disks.

Kwai S. Chan; Michael P. Enright; Jonathan P. Moody; Patrick J. Golden; Ramesh Chandra; Alan C. Pentz

2010-01-01T23:59:59.000Z

406

Fundamental studies of stress distributions and stress relaxation in oxide scales on high temperature alloys. [Final progress report  

SciTech Connect (OSTI)

This report summarizes a three-year study of stresses arising in the oxide scale and underlying metal during high temperature oxidation and of scale cracking. In-situ XRD was developed to measure strains during oxidation over 1000{degrees}C on pure metals. Acoustic emission was used to observe scale fracture during isothermal oxidation and cooling, and statistical analysis was used to infer mechanical aspects of cracking. A microscratch technique was used to measure the fracture toughness of scale/metal interface. A theoretical model was evaluated for the development and relaxation of stresses in scale and metal substrate during oxidation.

Shores, D.A.; Stout, J.H.; Gerberich, W.W.

1993-06-01T23:59:59.000Z

407

Waterside Stress Assisted Corrosion (SAC) of Boiler Tubes  

E-Print Network [OSTI]

Waterside Stress Assisted Corrosion (SAC) of Boiler Tubes School of Materials Science Boiler Areas Susceptible to SAC · Generally SAC initiates near weld joints on cold side of tubes · SAC cracks are difficult to detect inaccessibility · Failures Detected at Various Locations in Boilers

Das, Suman

408

The future of global water stress: An integrated assessment*  

E-Print Network [OSTI]

stress, with 80% of these located in developing countries. Uncertain regional climate change can play quantitative analysis and predictions of the risks of climate change and the challenges of limiting human to climate change. To this end, the Program brings together an interdisciplinary group from two established

409

Protein-driven membrane stresses in fusion and fission  

E-Print Network [OSTI]

hypotheses on how specific proteins act in the two types of membrane remodeling. Mechanics of fusionProtein-driven membrane stresses in fusion and fission Michael M. Kozlov1 , Harvey T. McMahon2 undergo continuous remodeling. Ex- ocytosis and endocytosis, mitochondrial fusion and fis- sion, entry

McMahon, Harvey

410

Stress and phase transformation phenomena in oxide films  

SciTech Connect (OSTI)

In situ optical methods are reviewed for characterization of phase transformation processes and evaluation of residual stress in solution- deposited metastable oxide films. Such low density films most often are deposited as disordered phases making them prone to crystallization and attendant densification when subjected to increased temperature and/or applied pressure. Inherent stress imparted during film deposition and its evolution during the transformation are evaluated from phonon frequency shifts seen in Raman spectra (TiO{sub 2}) or from changes in the laser-induced fluorescence emission spectra for films containing rare earth (Sm{sup +3}:Y{sub 3}Al{sub 5}O{sub 12}) or transition metal (Cr{sup +3}:Al{sub 2}O{sub 3}) dopants. The data in combination with measured increases in line intensities intrinsic to the evolving phase are used to follow crystallization processes in thin films. In general, film deposition parameters are found to influence the crystallite ingrowth kinetics and the magnitude of stress and stress relaxation in the film during the transformation. The utility of these methods to probe crystallization phenomena in oxide films will be addressed.

Exarhos, G.J.; Hess, N.J.

1992-04-01T23:59:59.000Z

411

Tackling Drought Stress: RECEPTOR-LIKE KINASES Present New Approaches  

Science Journals Connector (OSTI)

...The global potential of bioenergy on abandoned agriculture lands...irrigation projects: A critical review. In ILRI Annual Report 1988...water availability. Here, we review some of the classical approaches...stress responses. The available literature and analyses of available transcript...

Alex Marshall; Reidunn B. Aalen; Dominique Audenaert; Tom Beeckman; Martin R. Broadley; Melinka A. Butenko; Ana I. Caño-Delgado; Sacco de Vries; Thomas Dresselhaus; Georg Felix; Neil S. Graham; John Foulkes; Christine Granier; Thomas Greb; Ueli Grossniklaus; John P. Hammond; Renze Heidstra; Charlie Hodgman; Michael Hothorn; Dirk Inzé; Lars �stergaard; Eugenia Russinova; Rüdiger Simon; Aleksandra Skirycz; Yvonne Stahl; Cyril Zipfel; Ive De Smet

2012-06-12T23:59:59.000Z

412

Efficient Node Overlap Removal Using a Proximity Stress Model  

E-Print Network [OSTI]

Efficient Node Overlap Removal Using a Proximity Stress Model Emden R. Gansner and Yifan Hu AT the structural information inherent in a layout using little additional area. This paper presents a new node overlap removal algorithm that does well by these measures. 1 Introduction Most existing symmetric graph

Hu, Yifan

413

Optimal shapes and stresses of adherent cells on patterned substrates  

E-Print Network [OSTI]

We investigate a continuum mechanical model for an adherent cell on two dimensional adhesive micropatterned substrates. The cell is modeled as an isotropic and homogeneous elastic material subject to uniform internal contractile stresses. The build-up of tension from cortical actin bundles at the cell periphery is incorporated by introducing an energy cost for bending of the cell boundary, resulting to a resistance to changes in local curvature. Integrin-based adhesions are modeled as harmonic springs, that pin the cell to adhesive patches of a predefined geometry. Using Monte Carlo simulations and analytical techniques we investigate the competing effects of bulk contractility and cortical bending rigidity in regulating cell shapes on non-adherent regions. We show that the crossover from convex to concave cell edges is controlled by the interplay between contractile stresses and boundary bending rigidity. In particular, the cell boundary becomes concave beyond a critical value of the contractile stress that is proportional to the cortical bending rigidity. Furthermore, the intracellular stresses are found largely concentrated at the concave edge of the cell. The model can be used to generate a cell-shape phase diagram for each specific adhesion geometry.

Shiladitya Banerjee; Rastko Sknepnek; M. Cristina Marchetti

2013-12-24T23:59:59.000Z

414

Progress Report on Alloy 617 Isochronous Stress-Strain Curves  

SciTech Connect (OSTI)

Isochronous stress-strain curves for Alloy 617 up to a temperature of 1000°C will be required to qualify the material for elevated temperature design in Section III, Division 1, Subsection NH of the ASME Boiler and Pressure Vessel Code. Several potential methods for developing these curves are reviewed in this report. It is shown that in general power-law creep is the rate controlling deformation mechanism for a wide range of alloy heats, test temperatures and stresses. Measurement of the strain rate sensitivity of Alloy 617 indicates that the material is highly strain rate sensitive in the tensile deformation range above about 750°C. This suggests that the concept of a hot tensile curve as a bounding case on the isochronous stress-strain diagrams is problematic. The impact of strain rate on the hot tensile curves is examined and it is concluded that incorporating such a curve is only meaningful if a single tensile strain rate (typically the ASTM standard rate of 0.5%/min) is arbitrarily defined. Current experimentally determined creep data are compared to isochronous stress-strain curves proposed previously by the German programs in the 1980s and by the 1990 draft ASME Code Case. Variability in how well the experimental data are represented by the proposed design curves that suggests further analysis is necessary prior to completing a new draft Code Case.

Jill K. Wright; Richard N. Wright; Nancy J. Lybeck

2014-03-01T23:59:59.000Z

415

A theoretical study on stress sensitive differential amplifier (SSDA)  

E-Print Network [OSTI]

or load pair) will cause a current unmatchment in between of the two FETs which will follow the variation sensitivity is studied. The results show that both two input MOSFETs and two load MOSFETs of a SSDA can, the possibility of using active load FETs of a dif- ferential amplifier as stress sensitive element is discussed

Li, Jingjing

416

REYNOLDS STRESS MODEL IMPLEMENTATION FOR HYPERSONIC FLOW SIMULATIONS  

E-Print Network [OSTI]

REYNOLDS STRESS MODEL IMPLEMENTATION FOR HYPERSONIC FLOW SIMULATIONS Arianna Bosco, PhD student, 52056 Aachen, Germany Abstract The simulation of hypersonic flows presents some difficulties due of the model is analyzed. 1 Introduction The aerodynamic design of hypersonic inlets is a criti- cal issue

417

Analysing Web-Orchestrations Under Stress Using Uncertainty Profiles  

Science Journals Connector (OSTI)

......even broken). Risk management is a well-established...unpredictable surges in demand can occur. In this paper...stress due to over-demand, service improve- ment...interaction between over-demand and elas- ticity. We...Service calls may induce side effects. The orchestration......

Joaquim Gabarro; Maria Serna; Alan Stewart

2014-11-01T23:59:59.000Z

418

Stress tensor and bulk viscosity in relativistic nuclear collisions  

E-Print Network [OSTI]

We discuss the influence of different initial conditions for the stress tensor and the effect of bulk viscosity on the expansion and cooling of the fireball created in relativistic heavy ion collisions. In particular, we explore the evolution...however, it does not significantly increase the entropy produced....

Fries, Rainer J.; Mueller, Berndt; Schaefer, Andreas.

2008-01-01T23:59:59.000Z

419

Cell Signaling during Cold, Drought, and Salt Stress  

Science Journals Connector (OSTI)

...Frank et al., 2000 Katagiri et al., 2001). However, excess PLD activity may have a negative impact on plant stress tolerance...Accumulation of [3H] inositol 4,5 bisphosphate via a lithium-sensitive inositol polyphosphate 1-phosphatase. Pharmacology...

Liming Xiong; Karen S. Schumaker; Jian-Kang Zhu

420

On the tensile strength of water under pulsed dynamic stressing  

Science Journals Connector (OSTI)

...with a 135 mm lens, illumination being provided by a pair of Xenon flash lamps. The other system consisted of a Kodak EktaPro...Brown, S. W. J. 1997 Pressure waves arising from the oscillation of cavitation bubbles under dynamic stressing. J. Phys...

1999-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "von mises stress" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

Accelerated stress rupture lifetime assessment for fiber composites  

SciTech Connect (OSTI)

Objective was to develop a theoretical and experimental framework for predicting stress rupture lifetime for fiber polymer composites based on short-term accelerated testing. Originally a 3-year project, it was terminated after the first year, which included stress rupture experiments and viscoelastic material characterization. In principle, higher temperature, stress, and saturated environmental conditions are used to accelerate stress rupture. Two types of specimens were to be subjected to long-term and accelerated static tensile loading at various temperatures, loads in order to quantify both fiber and matrix dominated failures. Also, we were to apply state-of-the-art analytical and experimental characterization techniques developed under a previous DOE/DP CRADA for capturing and tracking incipient degradation mechanisms associated with mechanical performance. Focus was increase our confidence to design, analyze, and build long-term composite structures such as flywheels and hydrogen gas storage vessels; other applications include advanced conventional weapons, infrastructures, marine and offshore systems, and stockpile stewardship and surveillance. Capabilities developed under this project, though not completed or verified, are being applied to NIF, AVLIS, and SSMP programs.

Groves, S.E.; DeTeresa, S.J.; Sanchez, R.J.; Zocher, M.A.; Christensen, R.M.

1997-02-01T23:59:59.000Z

422

De-alloying and stress-corrosion cracking. Final report  

SciTech Connect (OSTI)

This research program has had two major areas of focus that are related: (1) alloy corrosion and (2) the role of selective dissolution in the stress corrosion cracking of alloy systems. These interrelated issues were examined using model systems such as Ag-Au and Cu-Au by conventional electrochemical techniques, in situ scanning tunneling microscopy (STM), in situ small angle neutron scattering (SANS), ultrahigh speed digital photography of fracture events, and computer simulations. The STM and SANS work were specifically aimed at addressing a roughening transition known to occur in alloy systems undergoing corrosion at electrochemical potentials greater than the so-called critical potential. Analytical models of de-alloying processes including the roughening transition were developed that specifically include curvature effects that are important in alloy corrosion processes. Stress-corrosion experiments were performed on the same model systems using rapid optical and electrochemical techniques on 50 {micro}m--250 {micro}m thick sheets and small diameter wires. The primary goal of this work was to develop a fundamental understanding of the corrosion and electrochemistry of alloys and the stress-corrosion cracking processes these alloys undergo. Computer simulations and analytical work identified surface stress and an important parameter in environmentally assisted fracture. The major results of the research on this program since the summer of 1993 are briefly summarized.

Sieradzki, K.

1998-09-01T23:59:59.000Z

423

Estimate of the stress field in Kilauea's south flank, Hawaii  

Science Journals Connector (OSTI)

......is combined with gravity and seawater pressure to give the total...2 of Table 4, gravity and seawater pressure. The shear stress...The effects of gravity and seawater pressure have been removed...1984. Magma supply and storage at Kilauea volcano, Hawaii......

Beiyuan Liang; Carl Kisslinger; Carol Bryan

1995-10-01T23:59:59.000Z

424

Actin stress fibre subtypes in mesenchymal-migrating cells  

Science Journals Connector (OSTI)

...of dorsal stress fibres and transverse fusion, as has been previously observed [30...ATP-induced contraction in fibrils isolated by laser micro-beam dissection. Cell Tissue Res...1242/jcs.072660 ) 95 Wilkinson, S , HF Paterson, and CJ Marshall. 2005 Cdc42-MRCK...

2013-01-01T23:59:59.000Z

425

Physiological and genetic responses of bacteria to osmotic stress.  

Science Journals Connector (OSTI)

...exerted on compartment 2 when the system reaches equilib- rium is the...glucose phosphotransferase system of Clositrid- iium71 pasteurianum...1987. Chemical rubber company handbook of chemistry and physics...stress: evolution of osmolyte systems. Science 217:1214-1227...

L N Csonka

1989-03-01T23:59:59.000Z

426

Early stages in the development of stress corrosion cracks  

SciTech Connect (OSTI)

Processes in growth of short cracks and stage I of long stress corrosion cracks were identified and evaluated. There is evidence that electrochemical effects can cause short stress corrosion cracks to grow at rates faster or slower than long cracks. Short cracks can grow at faster rates than long cracks for a salt film dissolution growth mechanism or from reduced oxygen inhibition of hydrolytic acidification. An increasing crack growth rate with increasing crack length could result from a process of increasing crack tip concentration of a critical anion, such as Cl{sup {minus}}, with increasing crack length in a system where the crack velocity is dependent on the Cl{sup {minus}} or some other anion concentration. An increasing potential drop between crack tip and mouth would result in an increased anion concentration at the crack tip and hence an increasing crack velocity. Stage I behavior of long cracks is another early development stage in the life of a stress corrosion crack which is poorly understood. This stage can be described by da/dt = AK{sup m} where da/dt is crack velocity, A is a constant, K is stress intensity and m ranges from 2 to 24 for a variety of materials and environments. Only the salt film dissolution model was found to quantitatively describe this stage; however, the model was only tested on one material and its general applicability is unknown.

Jones, R.H.; Simonen, E.P.

1993-12-01T23:59:59.000Z

427

1 INTRODUCTION Stressing brittle rocks leads to the development of  

E-Print Network [OSTI]

-dependent creep driven by stress corrosion and subcritical crack growth (Lockner, 1998). This creep strongly of fa- tigue and crack growth velocity function. The present experimental work was conducted at the Rock- uniform distributions of microfractures are related to fault nucleation and growth (Reches & Lockner, 1994

Ze'ev, Reches

428

inferences on stress-strength reliability from lindley distributions  

E-Print Network [OSTI]

inferences on stress-strength reliability from lindley distributions D.K. Al-Mutairi , M.E. Ghitany minimum variance unbiased estimator has explicit expression, however, its exact or asymptotic distribution be obtained in explicit form. We obtain the asymptotic distribution of the maximum likelihood estimator

Kundu, Debasis

429

Real-Time Redox Measurements during Endoplasmic Reticulum Stress Reveal  

E-Print Network [OSTI]

Real-Time Redox Measurements during Endoplasmic Reticulum Stress Reveal Interlinked Protein Folding.10.011 SUMMARY Disruption of protein folding in the endoplasmic reticulum (ER) causes unfolded proteins to accumu is active. Because ER redox po- tential is optimized for oxidative protein folding, we reasoned

Mullins, Dyche

430

Kohn-Sham Kinetic Energy Density in the Nuclear and Asymptotic Regions: Deviations from the Von Weizs\\"acker Behavior and Applications to Density Functionals  

E-Print Network [OSTI]

We show that the Kohn-Sham positive-definite kinetic energy (KE) density significantly differs from the von Weizs\\"acker (VW) one at the nuclear cusp as well as in the asymptotic region. At the nuclear cusp, the VW functional is shown to be linear and the contribution of p-type orbitals to the KE density is theoretically derived and numerically demonstrated in the limit of infinite nuclear charge, as well in the semiclassical limit of neutral large atoms. In the latter case, it reaches 12 of the KE density. In the asymptotic region we find new exact constraints for meta Generalized Gradient Approximation (meta-GGA) exchange functionals: with an exchange enhancement factor proportional to $\\sqrt{\\alpha}$, where $\\alpha$ is the common meta-GGA ingredient, both the exchange energy density and the potential are proportional to the exact ones. In addition, this describes exactly the large-gradient limit of quasi-two dimensional systems.

Della Sala, F; Constantin, L A

2014-01-01T23:59:59.000Z

431

Durational Properties of Lexical Stress and Grammatical Stress in Nanchang Chinese and Their Implications for Tonal Contrasts  

E-Print Network [OSTI]

...................................................................................................................22 3 Experiment-2: Study of tonal contrasts...........................................................................27 3.1 Methodology in the study of tonal contrasts in CV(R) monosyllables.................28 3.2 Methodology in study of tonal... contrasts in CV(R) syllables with and without lexical stress................................................................................................................30 3.2.1 Wordlist design...

Liu, Jiang

2010-03-11T23:59:59.000Z

432

Methods of classical mechanics applied to turbulence stresses in a tip leakage vortex  

SciTech Connect (OSTI)

Moore et al. measured the six Reynolds stresses in a tip leakage vortex in a linear turbine cascade. Stress tensor analysis, as used in classical mechanics, has been applied to the measured turbulence stress tensors. Principal directions and principal normal stresses are found. A solid surface model, or three-dimensional glyph, for the Reynolds stress tensor is proposed and used to view the stresses throughout the tip leakage vortex. Modeled Reynolds stresses using the Boussinesq approximation are obtained from the measured mean velocity strain rate tensor. The comparison of the principal directions and the three-dimensional graphic representations of the strain and Reynolds stress tensors aids in the understanding of the turbulence and what is required to model it.

Moore, J.G.; Schorn, S.A.; Moore, J. [Virginia Polytechnic Inst. and State Univ., Blacksburg, VA (United States)

1996-10-01T23:59:59.000Z

433

Is oxidative stress a physiological cost of reproduction? An experimental test in house mice  

Science Journals Connector (OSTI)

...cost of reproduction? An experimental test in house mice Michael Garratt 1 Aphrodite...with reproductive investment. Here, we test whether oxidative stress is a consequence...of reproductive investment. Here, we test whether oxidative stress is a consequence...

2011-01-01T23:59:59.000Z

434

Molecular cloning and characterization of important stress and redox regulatory genes from Hydra vulgaris  

E-Print Network [OSTI]

In this research, important stress and redox regulatory genes present in Hydra vulgaris were isolated and characterized to facilitate our understanding of the evolution and mechanisms of stress response. H. vulgaris heat shock protein 70 (HvHSP70...

Dash, Bhagirathi

2007-04-25T23:59:59.000Z

435

Silicon micromachined sensors and sensor arrays for shear-stress measurements in aerodynamic flows  

E-Print Network [OSTI]

In this thesis we report on a new micromachined floating-element shear-stress sensor for turbulent boundary layer research. Applications in low shear-stress environments such as turbulent boundary layers require extremely ...

Padmanabhan, Aravind

436

Restoration of hippocampal growth hormone reverses stress-induced hippocampal impairment  

E-Print Network [OSTI]

Though growth hormone (GH) is synthesized by hippocampal neurons, where its expression is influenced by stress exposure, its function is poorly characterized. Here, we show that a regimen of chronic stress that impairs ...

Vander Weele, Caitlin Miya

437

The elastic stress tensor of an axially symmetric three-layered earth model  

E-Print Network [OSTI]

everywhere. Also, equilibrium requires a strength in the material everywhere at least as great as the local stress difference. Therefore, the question he posed was, given the surface stresses what strength in the interior would be sufficient to preserve...

Rayhorn, James Edwin

2012-06-07T23:59:59.000Z

438

Effect of whipping stresses on the fatigue damage of ship structures  

Science Journals Connector (OSTI)

Fatigue failures in ships are mainly caused by waves. Higher frequent ... if this approach and the neglect of sequence effects of stress cycles are justified for these ... of the whipping stresses in fatigue anal...

Wolfgang Fricke; Hans Paetzold

2014-03-01T23:59:59.000Z

439

Radiation stress due to ocean waves and the resulting currents and set-up/set-down  

Science Journals Connector (OSTI)

The authors have developed a model to predict the radiation stresses in the coastal zone and to estimate currents and set-up/set-down of mean sea level. The values of radiation stress are calculated from veloc...

Carl Newell; Thomas Mullarkey; Mark Clyne

2005-12-01T23:59:59.000Z

440

Acrolein induces oxidative stress in brain mitochondria Jian Luo, Riyi Shi*  

E-Print Network [OSTI]

Acrolein induces oxidative stress in brain mitochondria Jian Luo, Riyi Shi* Department of Basic 2004 Available online 14 November 2004 Abstract Acrolein, a byproduct of lipid peroxidation, has been demonstrates that acrolein can directly stimulate mitochondrial oxidative stress. Specifically, exposure

Shi, Riyi

Note: This page contains sample records for the topic "von mises stress" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

Increased oxidative stress in barn swallows from the Chernobyl region Andrea Bonisoli-Alquati a,  

E-Print Network [OSTI]

Increased oxidative stress in barn swallows from the Chernobyl region Andrea Bonisoli-Alquati a Available online 5 November 2009 Keywords: Antioxidant capacity Barn swallow Chernobyl Oxidative stress Radioactive contamination Reactive oxygen species The Chernobyl nuclear accident produced the largest

Mousseau, Timothy A.

442

Plant Responses of Drip Irrigated Trees to Climate and Water Stress  

E-Print Network [OSTI]

Past irrigation research has shown that peach (prunus persica) trees vary in their field response to water stress, and the degree of stress is a function of the plants' environment. Water deficits reduce plant growth and crop yields, therefore...

Punthakey, J. F.; McFarland, M. J.; Rodrigue, P. B.; Worthington, J. W.

443

Correlations to determine in-situ stress from open-hole logging data in sandstone reservoirs  

E-Print Network [OSTI]

Knowledge of in-situ stress distribution within reservoir sandstones and the surrounding formations is recognized as one of the most important factors in the design and analysis of hydraulic fractures. In-situ stress contrast between layers of rock...

Gongora, Cesar Augusto

2012-06-07T23:59:59.000Z

444

Residual stress measurement on ductile cast iron using critically refracted longitudinal (Lcr) wave technique  

E-Print Network [OSTI]

using ultrasonics was approached. Residual stresses in castings are developed for various reasons. The presence of these stresses, coupled with applied stresses in service, sometimes results in the yield of material and subsequent failure of component.... Present work was focussed on development of an ultrasonic technique using critically refracted longitudinal (L g waves for evaluating residual stresses in ductile cast iron. An L probe suitable to work with ductile cast iron was designed and fabricated...

Chundu, Srinivasulu Naidu

2012-06-07T23:59:59.000Z

445

Tissue plasminogen activator and plasminogen mediate stress-induced decline of neuronal and  

E-Print Network [OSTI]

, and expression of growth-associated protein-43 in the cornu ammonis 1 region. Strikingly, the stress

446

Effect of external stress on moisture diffusion in an epoxy resin and its composite material  

E-Print Network [OSTI]

) Michael Chamberlain Henson, B. S. , Texas A&N University Chairman of Advisory Comnittee: Dr. Y. Weitsman The effects of stress on moisture diffusion in a graphite epoxy composrte material have been studied experimentally by examining the correspondrng... diffusion at all stress levels while the graphite epoxy generated results indicative of Non-Fickean, . concentration dependent diffusion at different levels of stress. The external stress affected both materials in a similar manner, causing...

Henson, Michael Chamberlain

2012-06-07T23:59:59.000Z

447

Abiotic Stress Effects on Physiological, Agronomic and Molecular Parameters of 1-MCP Treated Cotton Plants  

E-Print Network [OSTI]

(synthetic ethylene) was applied as a source of abiotic stress. Greenhouse treatments were two 1-MCP rates (0 and 2.4 g a.i. L-1) during a14-h overnight incubation that were then subjected to two water regimes (control and stressed) as the source of stress... point. Plants were thus kept at a constant level of stress. Bars represent SE where greater than the symbol. ........................................................................... 56 Fig. III.5. 1-MCP application by water regime...

Da Costa, Vladimir Azevedo

2012-02-14T23:59:59.000Z

448

Stress-specific signatures: expression profiling of p53 wild-type and -null human cells  

E-Print Network [OSTI]

of the transcribed genome. For instance, up to 20% of the yeast genome may be stress responsive (Jelinsky et al

449

Root-Water-Uptake Based upon a New Water Stress Reduction and an Asymptotic Root Distribution Function  

Science Journals Connector (OSTI)

A water stress–compensating root-water-uptake module was developed based upon a newly proposed water stress reduction function and an asymptotic root distribution function. The water stress reduction function takes into account both soil water ...

K. Y. Li; R. De Jong; M. T. Coe; N. Ramankutty

2006-06-01T23:59:59.000Z

450

Experimental program to assess the effect of residual stresses on fracture behavior  

SciTech Connect (OSTI)

A series of ``model material`` tests were previously undertaken on aluminium alloy tensile loaded plate specimens containing a central through-thickness crack to investigate the effect of in-plane self-balancing residual stresses on ductile tearing behavior in the context of the R6 methodology. Residual stresses were generated by an electron-beam welding method and this resulted in stress levels of the order of 1/3 yield stress in the test specimens. Provisional results of these tests were presented at the 1993 ASME PVP conference. The value of 1/3 yield is commonly considered as the level of residual stress for fracture assessments of structural components which have been stress relieved. For non stress relieved components, higher values of residual stress need to be considered. A new design of test specimen has therefore been developed. Further ductile tearing experiments have been undertaken on this new design of specimen. The results obtained from these, and the previous tests, have quantitatively demonstrated the influence of residual stress on fracture behavior in terms of both the level of residual stress and the region under consideration on the R6 failure assessment diagram. The general conservatism of the current R6 method for dealing with residual stresses has been confirmed for the type of geometry, loading and residual stress field under consideration.

Sharples, J.K.; Sanderson, D.J.; Bowdler, B.R.; Wightman, A.P. [AEA Technology, Risley (United Kingdom). Technical Services Division; Ainsworth, R.A. [Nuclear Electric plc, Berkeley (United Kingdom)

1995-11-01T23:59:59.000Z

451

Figure 1: Multiplex logarithmic microfluidic perfusion array for probing shear stress effects on stem cells. (A)  

E-Print Network [OSTI]

Figure 1: Multiplex logarithmic microfluidic perfusion array for probing shear stress effects on stem cells. (A) Microfluidic perfusion systems exhibit more defined shear stress profiles and consume. (B) A 1x6 multiplex logarithmic microfluidic array for simultaneous application of shear stress

Voldman, Joel

452

Using Uncertainty Analysis to Guide the Development of Accelerated Stress Tests (Presentation)  

SciTech Connect (OSTI)

Extrapolation of accelerated testing to the long-term results expected in the field has uncertainty associated with the acceleration factors and the range of possible stresses in the field. When multiple stresses (such as temperature and humidity) can be used to increase the acceleration, the uncertainty may be reduced according to which stress factors are used to accelerate the degradation.

Kempe, M.

2014-03-01T23:59:59.000Z

453

Rapid Loss of Stress Fibers in Chinese Hamster Ovary Cells after Hyperthermia  

Science Journals Connector (OSTI)

...biological effects of heat and, in particular, heat radiosensitization. Rapid loss of stress fibers...degrees) on the distribution of actin stress...35), and the loss of stress fibers...changes in ion distribution in response to heat could lead to...

James R. Glass; Robert G. DeWitt; and Anne E. Cress

1985-01-01T23:59:59.000Z

454

Are we there yet?: feasibility of continuous stress assessment via wireless physiological sensors  

Science Journals Connector (OSTI)

Stress can lead to headaches and fatigue, precipitate addictive behaviors (e.g., smoking, alcohol and drug use), and lead to cardiovascular diseases and cancer. Continuous assessment of stress from sensors can be used for timely delivery of a variety ... Keywords: mobile health, stress, wireless physiological sensor

Md. Mahbubur Rahman, Rummana Bari, Amin Ahsan Ali, Moushumi Sharmin, Andrew Raij, Karen Hovsepian, Syed Monowar Hossain, Emre Ertin, Ashley Kennedy, David H. Epstein, Kenzie L. Preston, Michelle Jobes, J. Gayle Beck, Satish Kedia, Kenneth D. Ward, Mustafa al'Absi, Santosh Kumar

2014-09-01T23:59:59.000Z

455

Critical Fracture Stress and Fracture Strain Models for the Prediction of Lower and  

E-Print Network [OSTI]

Critical Fracture Stress and Fracture Strain Models for the Prediction of Lower and Upper Shelf fracture stress and stress modified fracture strain models are utilized to describe the variation of lower and upper shelf fracture toughness with temperature and strain rate for two alloy steels used

Ritchie, Robert

456

Plastic cap evolution law derived from induced transverse isotropy in dilatational triaxial compression.  

SciTech Connect (OSTI)

Mechanical testing of porous materials generates physical data that contain contributions from more than one underlying physical phenomenon. All that is measurable is the “ensemble” hardening modulus. This thesis is concerned with the phenomenon of dilatation in triaxial compression of porous media, which has been modeled very accurately in the literature for monotonic loading using models that predict dilatation under triaxial compression (TXC) by presuming that dilatation causes the cap to move outwards. These existing models, however, predict a counter-intuitive (and never validated) increase in hydrostatic compression strength. This work explores an alternative approach for modeling TXC dilatation based on allowing induced elastic anisotropy (which makes the material both less stiff and less strong in the lateral direction) with no increase in hydrostatic strength. Induced elastic anisotropy is introduced through the use of a distortion operator. This operator is a fourth-order tensor consisting of a combination of the undeformed stiffness and deformed compliance and has the same eigenprojectors as the elastic compliance. In the undeformed state, the distortion operator is equal to the fourth-order identity. Through the use of the distortion operator, an evolved stress tensor is introduced. When the evolved stress tensor is substituted into an isotropic yield function, a new anisotropic yield function results. In the case of the von Mises isotropic yield function (which contains only deviatoric components), it is shown that the distortion operator introduces a dilatational contribution without requiring an increase in hydrostatic strength. In the thesis, an introduction and literature review of the cap function is given. A transversely isotropic compliance is presented, based on a linear combination of natural bases constructed about a transverse-symmetry axis. Using a probabilistic distribution of cracks constructed for the case of transverse isotropy, a compliance expression is presented that demonstrated a decrease in lateral stiffness, but leaves axial stiffness unchanged. A demonstration of how the distortion operator could be used in the elastic/plastic analysis of a von Mises surface loaded in TXC is also presented.

Macon, David James; Brannon, Rebecca Moss; Strack, Otto Erik

2014-02-01T23:59:59.000Z

457

Oxidative Stress and Skeletal Health with Low Dose, Ionizing Radiation  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Oxidative Stress and Skeletal Health with Low Dose, Ionizing Radiation Oxidative Stress and Skeletal Health with Low Dose, Ionizing Radiation Globus Ruth NASA Ames Research Center Abstract Osteoporosis profoundly affects the aging U.S. population and exposure to high doses of radiation causes bone loss similar to age-related osteoporosis, although the influence of low dose radiation exposures is not known. The central hypothesis of our DOE project (NASA supplement) is that low doses of radiation modulate subsequent skeletal degeneration via oxidative pathways. Our working hypothesis is that a prior exposure to low dose radiation regulates oxidative metabolism within bone and contributes to bone loss caused either by subsequent high, challenge doses of radiation or by aging. HZE source: Because astronauts are exposed to radiation from GCR and solar

458

Stress-corrosion cracking in BWR and PWR piping  

SciTech Connect (OSTI)

Intergranular stress-corrosion cracking of weld-sensitized wrought stainless steel piping has been an increasingly ubiquitous and expensive problem in boiling-water reactors over the last decade. In recent months, numerous cracks have been found, even in large-diameter lines. A number of potential remedies have been developed. These are directed at providing more resistant materials, reducing weld-induced stresses, or improving the water chemistry. The potential remedies are discussed, along with the capabilities of ultrasonic testing to find and size the cracks and related safety issues. The problem has been much less severe to date in pressurized-water reactors, reflecting the use of different materials and much lower coolant oxygen levels.

Weeks, R.W.

1983-07-01T23:59:59.000Z

459

Protein structure and hydration probed by SANS and osmotic stress  

SciTech Connect (OSTI)

Interactions governing protein folding, stability, recognition, and activity are mediated by hydration. Here, we use small-angle neutron scattering coupled with osmotic stress to investigate the hydration of two proteins, lysozyme and guanylate kinase (GK), in the presence of solutes. By taking advantage of the neutron contrast variation that occurs upon addition of these solutes, the number of protein-associated (solute-excluded) water molecules can be estimated from changes in both the zero-angle scattering intensity and the radius of gyration. Poly(ethylene glycol) exclusion varies with molecular weight. This sensitivity can be exploited to probe structural features such as the large internal GK cavity. For GK, small-angle neutron scattering is complemented by isothermal titration calorimetry with osmoticstress to also measure hydration changes accompanying ligand binding. These results provide a framework for studying other biomolecular systems and assemblies using neutron scattering together with osmotic stress.

Rau, Dr. Donald [National Institutes of Health

2008-01-01T23:59:59.000Z

460

Residual stress analysis of multilayer environmental barrier coatings.  

SciTech Connect (OSTI)

Silicon-based ceramics (SiC, Si{sub 3}N{sub 4}) are promising materials systems for high-temperature structural applications in gas turbine engines. However, the silica layer that forms on these materials is susceptible to attack from water vapor present in combustion environments. To protect against this degradation, environmental barrier coatings (EBCs) have been developed to shield the underlying substrate and prevent degradation. Here we report on elastic and thermal properties, as well as internal stresses of candidate multilayer coatings, as measured in situ using microfocused high-energy X-rays in a transmission diffraction geometry. Doped aluminosilicate coatings were investigated for their stability on a SiC/SiC melt-infiltrated substrate. The coatings consisted of a Ba{sub 1-x}Sr{sub x}Al{sub 2}Si{sub 2}O{sub 8} topcoat with a mullite or mullite+SrAl{sub 2}Si{sub 2}O{sub 8} interlayer, and a silicon bond coat. A numerical model was used to compare the stress results with an ideal coating system. Experiments were carried out on as-sprayed and heat-treated samples in order to analyze the strain and phase evolution as a function of multilayer depth and temperature. The phase transformation of the topcoat promoted healing of cracks in the EBC and reduced stresses in the underlying layers and the addition of SAS to the interlayer reduced stresses in thermally cycled coatings, but did not stop cracks from forming.

Harder, B.; Almer, J.; Weyant, C.; Lee, K.; Faber, K.; Northwestern Univ.; Rolls-Royce Corp.

2009-02-01T23:59:59.000Z

Note: This page contains sample records for the topic "von mises stress" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


461

Microorganisms having enhanced tolerance to inhibitors and stress  

DOE Patents [OSTI]

The present invention provides genetically modified strains of microorganisms that display enhanced tolerance to stress and/or inhibitors such as sodium acetate and vanillin. The enhanced tolerance can be achieved by increasing the expression of a protein of the Sm-like superfamily such as a bacterial Hfq protein and a fungal Sm or Lsm protein. Further, the present invention provides methods of producing alcohol from biomass materials by using the genetically modified microorganisms of the present invention.

Brown, Steven D.; Yang, Shihui

2014-07-29T23:59:59.000Z

462

Effects of family routines and family stress on child competencies  

E-Print Network [OSTI]

2006 Major Subject: School Psychology iii ABSTRACT Effects of Family Routines and Family Stress on Child Competencies. (August 2006) Crystal Rene? Hill, B.A., Francis Marion University; M.S., Francis Marion University Chair..., Fuligni, & Brooks-Gunn, 2002). Additionally, better child health (Boyce et al., 1977; Fiese & Wamboldt, 2003a; Fiese & Wamboldt, 2003b; Fiese, Wamboldt, & Anbar, 2005) and overall higher levels of child regulatory control (Fiese...

Hill, Crystal Renee

2006-10-30T23:59:59.000Z

463

Experimental stress analysis of a sphere under a diametral load  

E-Print Network [OSTI]

~ Page 1. Plaster Mold for Casting Spheres. 2, Sphere in Loading Frame. Orientation of Meridional and Equatorial Slices. 4. Orientation of Rectangular Coordinate Axes. 5 ~ Positive Stresses. If the Shear Diagonal Lies in the First and Third... in parentheses refer to references listed in the BIBLIOGRAPHY. 2. OBTAINING PHOTOELASTIC DATA Pattern and Hold. A billiard ball (2 1/4 inch diameter) was chosen for the pattern because of its symmetry, hardness and sine. Hydro- cal A-11 pattern shop plaster...

Noyes, Theodore Alvan

2012-06-07T23:59:59.000Z

464

Environmental stress cracking of plastics under dynamic conditions  

E-Print Network [OSTI]

The objective of this study was to find out if dynamic conditions have any effect on the phenomenon of environmental stress cracking (ESC). Dynamic conditions in this study include thermal shock, mechanical shock, and vibrations. Injection blow molded... resistance of blow molded polyethylene containers. The experimental data indicated that each of the dynamic conditions accelerated the ESC. Therefore, the results obtained from the static tests cannot be used to predict the service life of the containers...

Suresh, Mitta

1992-01-01T23:59:59.000Z

465

Salivary Alpha-Amylase as an Indicator of Body Stress Following an Acute Session of Repetitive Jumping.  

E-Print Network [OSTI]

??Determining body stress levels is important when developing training programs for athletes and rehab facilities. Stress levels during exercise are commonly measured using heart rate,… (more)

Allen, Shaelee

2014-01-01T23:59:59.000Z

466

Uncertainty in the maximum principal stress estimated from hydraulic fracturing Measurements due to the presence of the induced fracture  

E-Print Network [OSTI]

reopening during hydraulic fracturing stress determinations.Laboratory study of hydraulic fracturing pressure data?Howevaluation of hydraulic fracturing stress measurement

Rutqvist, Jonny; Tsang, Chin-fu; Stephansson, Ove

2000-01-01T23:59:59.000Z

467

Stress localization, stiffening and yielding in a model colloidal gel  

E-Print Network [OSTI]

We use numerical simulations and an athermal quasi-static shear protocol to investigate the yielding of a model colloidal gel. Under increasing deformation, the elastic regime is followed by a significant stiffening before yielding takes place. A space-resolved analysis of deformations and stresses unravel how the complex load curve observed is the result of stress localization and that the yielding can take place by breaking a very small fraction of the network connections. The stiffening corresponds to the stretching of the network chains, unbent and aligned along the direction of maximum extension. It is characterized by a strong localization of tensile stresses, that triggers the breaking of a few network nodes at around 30% of strain. Increasing deformation favors further breaking but also shear-induced bonding, eventually leading to a large-scale reorganization of the gel structure at the yielding. At low enough shear rates, density and velocity profiles display significant spatial inhomogeneity during yielding in agreement with experimental observations.

Jader Colombo; Emanuela Del Gado

2014-06-16T23:59:59.000Z

468

Residual Stress Evaluation within a Crimped Splice Connector Assembly  

SciTech Connect (OSTI)

In power transmission, connectors play an important role in the efficiency and reliability of the system. Due to the increase of power demand and lack of new infrastructure, existing overhead power transmission lines often need to operate at temperatures higher than the original design criteria. However, this had led to the accelerated aging and degradation of splice connectors, which has been manifested by the formation of hot-spots that have been revealed by infrared imaging during inspection of transmission lines operating at elevated temperatures. The implications of connector aging is two-fold: (1) significant increase in resistivity of the splice connector (i.e., less efficient transmission of electricity) and (2) significant reduction in the connector clamping strength, which ultimately results in separation of the power transmission line at the joint. Therefore, the splice connector has become the weakest link in the electric power transmission infrastructure. The compressive residual stresses induced by the crimping process within the splice provide the clamping forces to secure the conductor and therefore, the determination of the state of residual stresses in splice connectors is a necessary requirement to provide an accurate estimate of their service lifetime. This paper presents a protocol of utilizing finite-element analysis and neutron scattering experiments for evaluating the residual stress fields within a crimped single-stage splice connector assembly.

Wang, Jy-An John [ORNL; An, Ke [ORNL; Lara-Curzio, Edgar [ORNL; Hubbard, Camden R [ORNL; King Jr, Thomas J [ORNL; Graziano, Joe [Tennessee Valley Authority (TVA); Chan, John [Electric Power Research Institute (EPRI)

2006-01-01T23:59:59.000Z

469

Weibull Effective Area for Hertzian Ring Crack Initiation Stress  

SciTech Connect (OSTI)

Spherical or Hertzian indentation is used to characterize and guide the development of engineered ceramics under consideration for diverse applications involving contact, wear, rolling fatigue, and impact. Ring crack initiation can be one important damage mechanism of Hertzian indentation. It is caused by sufficiently-high, surface-located, radial tensile stresses in an annular ring located adjacent to and outside of the Hertzian contact circle. While the maximum radial tensile stress is known to be dependent on the elastic properties of the sphere and target, the diameter of the sphere, the applied compressive force, and the coefficient of friction, the Weibull effective area too will be affected by those parameters. However, the estimations of a maximum radial tensile stress and Weibull effective area are difficult to obtain because the coefficient of friction during Hertzian indentation is complex, likely intractable, and not known a priori. Circumventing this, the Weibull effective area expressions are derived here for the two extremes that bracket all coefficients of friction; namely, (1) the classical, frictionless, Hertzian case where only complete slip occurs, and (2) the case where no slip occurs or where the coefficient of friction is infinite.

Jadaan, Osama M. [University of Wisconsin, Platteville; Wereszczak, Andrew A [ORNL; Johanns, Kurt E [ORNL

2011-01-01T23:59:59.000Z

470

Toxicological and pharmacological concerns on oxidative stress and related diseases  

SciTech Connect (OSTI)

Although reactive oxygen species (ROS) such as superoxide, hydrogen peroxide and hydroxyl radical are generated as the natural byproduct of normal oxygen metabolism, they can create oxidative damage via interaction with bio-molecules. The role of oxidative stress as a remarkable upstream part is frequently reported in the signaling cascade of inflammation as well as chemo attractant production. Even though hydrogen peroxide can control cell signaling and stimulate cell proliferation at low levels, in higher concentrations it can initiate apoptosis and in very high levels may create necrosis. So far, the role of ROS in cellular damage and death is well documented with implicating in a broad range of degenerative alterations e.g. carcinogenesis, aging and other oxidative stress related diseases (OSRDs). Reversely, it is cleared that antioxidants are potentially able to suppress (at least in part) the immune system and to enhance the normal cellular protective responses to tissue damage. In this review, we aimed to provide insights on diverse OSRDs, which are correlated with the concept of oxidative stress as well as its cellular effects that can be inhibited by antioxidants. Resveratrol, angiotensin converting enzyme inhibitors, angiotensin receptor blockers, statins, nebivolol and carvedilol, pentaerythritol tetranitrate, mitochondria-targeted antioxidants, and plant-derived drugs (alone or combined) are the potential medicines that can be used to control OSRD.

Saeidnia, Soodabeh [Medicinal Plants Research Center, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran 1417614411 (Iran, Islamic Republic of); College of Pharmacy and Nutrition, University of Saskatchewan, Saskatoon (Canada); Abdollahi, Mohammad, E-mail: Mohammad@TUMS.Ac.Ir [Department of Toxicology and Pharmacology, Faculty of Pharmacy, Pharmaceutical Sciences Research Center, Tehran University of Medical Sciences, Tehran 1417614411 (Iran, Islamic Republic of)

2013-12-15T23:59:59.000Z

471

Research on mechanisms of stress corrosion cracking in Zircaloy  

SciTech Connect (OSTI)

The results of internal gas pressurization tests, primarily at 320/sup 0/C, on cladding tubes from two suppliers, Supplier A and Supplier B, are presented. The two lots show a substantial difference in iodine SCC susceptibility so a test matrix is used to resolve the relative contributions of surface condition, residual stress, and texture. Additional tests with constant deflection split-ring specimens and with unstressed cladding segments are used to understand crack initiation and the early crack growth stages of SCC. The difference in SCC susceptibility is due to crystallographic texture. Other variables such as surface finish, stress relief temperature, and residual stress have little or no effect. Mechanical properties, crack initiation, and crack propagation all depend on texture. Both initiation and propagation features are analyzed by scanning electron microscopy. A mechanism for crack initiation consistent with most observations in this study and with the work of other investigators is proposed. At 320/sup 0/C, lifetime is crack initiation limited while several tests at 390/sup 0/C indicate that lifetime is less initiation limited at higher temperature. 31 figures, 9 tables.

Knorr, D.B.; Pelloux, R.M.

1981-06-01T23:59:59.000Z

472

MULTI-PHASE FRACTURE-MATRIX INTERACTIONS UNDER STRESS CHANGES  

SciTech Connect (OSTI)

The main objectives of this project are to quantify the changes in fracture porosity and multiphase transport properties as a function of confining stress. These changes will be integrated into conceptual and numerical models that will improve our ability to predict and optimize fluid transport in fractured system. This report details our progress on: (a) developing the direct experimental measurements of fracture aperture and topology and fluid occupancy using high-resolution x-ray micro-tomography, (b) quantifying the effect of confining stress on the distribution of fracture aperture, and (c) characterization of shear fractures and their impact on multi-phase flow. The three-dimensional surface that describes the large-scale structure of the fracture in the porous medium can be determined using x-ray micro-tomography with significant accuracy. Several fractures have been scanned and the fracture aperture maps have been extracted. The success of the mapping of fracture aperture was followed by measuring the occupancy of the fracture by two immiscible phases, water and decane, and water and kerosene. The distribution of fracture aperture depends on the effective confining stress on the nature of the rock and the type and distribution of the asperities that keep the fracture open. Fracture apertures at different confining stresses were obtained by micro-tomography covering a range of about two thousand psig. Initial analysis of the data shows a significant aperture closure with increase in effective confining stress. Visual descriptions of the process are shown in the report while detailed analysis of the behavior of the distribution of fracture aperture is in progress. Both extensional and shear fractures are being considered. The initial multi-phase flow tests were done in extensional fractures. Several rock samples with induced shear fracture are being studies, and some of the new results are presented in this report. These samples are being scanned in order to quantify the distribution of apertures and the nature of the asperities. Low resolution images of fluids in a sample with a shear fracture were performed and they provide the confidence that flow patterns and saturations could be determined in the future. A series of water imbibition tests were conducted in which water was injected into a fracture and its migration into the matrix was monitored with CT and DR x-ray techniques. The objective is to understand the impact of the fracture, its topology and occupancy on the nature of mass transfer between the matrix and the fracture. Counter-current imbibition next to the fracture was observed and quantified, including the influence of formation layering.

A.S. Grader; D. Elsworth; P.M. Halleck; F. Alvarado; A. Alajmi; Z. Karpyn; N. Mohammed; S. Al-Enezi

2005-06-15T23:59:59.000Z

473

Stress-tuned conductor-polymer composite for use in sensors  

DOE Patents [OSTI]

A method for making a composite polymeric material with electrical conductivity determined by stress-tuning of the conductor-polymer composite, and sensors made with the stress-tuned conductor-polymer composite made by this method. Stress tuning is achieved by mixing a miscible liquid into the polymer precursor solution or by absorbing into the precursor solution a soluble compound from vapor in contact with the polymer precursor solution. The conductor may or may not be ordered by application of a magnetic field. The composite is formed by polymerization with the stress-tuning agent in the polymer matrix. The stress-tuning agent is removed following polymerization to produce a conductor-polymer composite with a stress field that depends on the amount of stress-tuning agent employed.

Martin, James E; Read, Douglas H

2013-10-22T23:59:59.000Z

474

Characterization of UHV E-beam Evaporated Low-Stress Thick Silicon Film for MEMS Application  

Science Journals Connector (OSTI)

This paper investigates various deposition and subsequent processing conditions on UHV e-beam evaporated silicon to obtain low stress film. They include substrate temperature, deposition rate, annealing, thermal oxidation and post-oxidation annealing. Film stress is measured for each condition and cantilever beams made from the films are released for evaluating stress-gradient. Films are also deposited on sloped step structures to observe step and corner coverage. The results indicate that as-deposited evaporated silicon exhibits tensile stress at substrate temperatures below 400?C and compressive stress as substrate temperature is increased above 400?C for a 100 nm/min deposition rate. For evaporated amorphous silicon films, performing thermal oxidation at 900?C and annealing at elevated temperatures has been found to be effective in reducing film stress. For fully crystallized poly-silicon films, however, annealing at 1000?C without thermal oxidation seems to be the more effective way of reducing stress in the film.

A. Michael; O. Kazuo; Y.W. Xu; C.Y. Kwok; T. Puzzer; S. Varlamov

2012-01-01T23:59:59.000Z

475

Summary Effects of water stress on fruit fresh and dry weights were investigated in peach trees, Prunus persica (L.)  

E-Print Network [OSTI]

Summary Effects of water stress on fruit fresh and dry weights were investigated in peach trees of water stress increased with increasing crop load. Water stress induced fruit fresh weight reductions at all crop loads. Fruit dry weight was not reduced by water stress in trees having light to moderate

DeJong, Theodore

476

Stressful life events, social support, and cognitive function in middle-aged adults with a family history of Alzheimer's disease  

E-Print Network [OSTI]

is evidence that both perceived stress and social support can influence brain health and cognitive function

Scharer, John E.

477

On the performance of the ASM 150 stressed membrane heliostat  

SciTech Connect (OSTI)

A single element, 150 m{sup 2} stressed-membrane central receiver heliostat was designed and manufactured by private German companies engaged in the development of commercial central receiver technology. It was installed at the Spanish-German solar test site, the Plataforma Solar de Almeria (PSA) near Tabernas in southern Spain in spring `95 (Haeger, M. et al., 1995). It is being evaluated together with two Spanish glass-metal heliostats in the frame of an extensive test program through 1996. First results of the test program are the subject of this paper. Results of beam quality measurements, performance tests of the focusing system and power consumption data are presented.

Weinrebe, G. [Plataforma Solar de Almeria, Tabernas (Spain); Schmitz-Goeb, M. [L and C Steinmueller, Gummersbach (Germany); Schiel, W. [Schlaich Bergermann and Partner, Stuttgart (Germany)

1996-12-31T23:59:59.000Z

478

Stress resultants in hyperboloid cooling tower shells subjected to foundation settlement  

SciTech Connect (OSTI)

The effect of differential settlement of columns supporting a natural draught hyperboloid cooling tower on the stress resultants in the tower shell is analyzed using discrete finite element modelling of the shell and the supporting base. The quadrilateral facet shell elements and 3-D beam elements are used to model the shell and the columns respectively. The stress resultants obtained due to an imposed settlement are compared with those reported earlier by other investigators. In the existing literature, the stress resultants are found using the Boussinesq equation to calculate the approximate edge loading (column forces) on the cooling tower shell due to differential settlement. It is shown in the present study that using the Boussinesq solution for the calculation of edge loading may lead to an over-estimation of the column forces and hence the stress resultants. The magnitude of stress resultants is also found to be dependent on the column flexibility. The paper also presents an investigation in which the local amplification of stress resultants in the vicinity of the shell column junction of the cooling towers (stress concentration) due to dead load and foundation settlement is studied. It is shown that the stress concentration can be severe, i.e., up to seven times the average stress resultants for dead load, and up to five times the average stress resultants for the foundation settlement. 28 refs.

Krishna Mohan Rao, S.V.; Appa Rao, T.V.S.R. [CSIR Campus, Madras (India)

1994-08-01T23:59:59.000Z

479

Effects of residual stresses on the fracture toughness of Zircaloy-2 tubes  

SciTech Connect (OSTI)

Data applicable to evaluating the fracture toughness of Zircaloy-2 pressure tubes were evaluated according to the criteria in ASTM Standards E399 and E813. It was found that the data did not meet the criteria specified in the standards, thus making it necessary to account for residual stress in determining the fracture toughness of the tubes. Therefore, residual stress in pressure tube specimens was experimentally determined to allow the incorporation of residual stresses in the calculation of fracture toughness. Sections of as fabricated 82.5 mm OD Zircaloy-2 tubes in the 30% cold worked condition were used in testing. Electrochemical Machining (ECM) was used to remove material from the interior of the tube, while measuring the resulting change in strain on the exterior of the tube with delta rosette strain gages. Utilization of this technique to reduce the cross sectional area of a tube without introducing additional stresses offers an accurate procedure for obtaining data to calculate the residual stress distribution. Assuming elastic anisotropy, the stress equations developed by Voyiadjis, Kiousis, and Hartley were used to determine the residual tangential, radial, and longitudinal stresses as a function of wall thickness. Additionally, these equations allow the determination of the shear stress and subsequently the principal stress profiles. It was found that the measured residual stress level was high enough that it must be accounted for when determining the fracture toughness of the subject Zircaloy-2 tubes. 7 refs., 7 figs.

Mohamadian, H.P.; Mirshams, A.R. (Southern Univ., Baton Rouge, LA (USA). Dept. of Mechanical Engineering); Cunningham, M.E. (Pacific Northwest Lab., Richland, WA (USA))

1991-05-01T23:59:59.000Z

480

Single-wave-number representation of nonlinear energy spectrum in elastic-wave turbulence of the Föppl–von Kármán equation: Energy decomposition analysis and energy budget  

Science Journals Connector (OSTI)

A single-wave-number representation of a nonlinear energy spectrum, i.e., a stretching-energy spectrum, is found in elastic-wave turbulence governed by the Föppl–von Kármán (FvK) equation. The representation enables energy decomposition analysis in the wave-number space and analytical expressions of detailed energy budgets in the nonlinear interactions. We numerically solved the FvK equation and observed the following facts. Kinetic energy and bending energy are comparable with each other at large wave numbers as the weak turbulence theory suggests. On the other hand, stretching energy is larger than the bending energy at small wave numbers, i.e., the nonlinearity is relatively strong. The strong correlation between a mode ak and its companion mode a?k is observed at the small wave numbers. The energy is input into the wave field through stretching-energy transfer at the small wave numbers, and dissipated through the quartic part of kinetic-energy transfer at the large wave numbers. Total-energy flux consistent with energy conservation is calculated directly by using the analytical expression of the total-energy transfer, and the forward energy cascade is observed clearly.

Naoto Yokoyama and Masanori Takaoka

2014-12-08T23:59:59.000Z

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481

Single-wavenumber Representation of Nonlinear Energy Spectrum in Elastic-Wave Turbulence of {F}öppl-von {K}ármán Equation: Energy Decomposition Analysis and Energy Budget  

E-Print Network [OSTI]

A single-wavenumber representation of nonlinear energy spectrum, i.e., stretching energy spectrum is found in elastic-wave turbulence governed by the F\\"oppl-von K\\'arm\\'an (FvK) equation. The representation enables energy decomposition analysis in the wavenumber space, and analytical expressions of detailed energy budget in the nonlinear interactions are obtained for the first time in wave turbulence systems. We numerically solved the FvK equation and observed the following facts. Kinetic and bending energies are comparable with each other at large wavenumbers as the weak turbulence theory suggests. On the other hand, the stretching energy is larger than the bending energy at small wavenumbers, i.e., the nonlinearity is relatively strong. The strong correlation between a mode $a_{\\bm{k}}$ and its companion mode $a_{-\\bm{k}}$ is observed at the small wavenumbers. Energy transfer shows that the energy is input into the wave field through stretching-energy transfer at the small wavenumbers, and dissipated through the quartic part of kinetic-energy transfer at the large wavenumbers. A total-energy flux consistent with the energy conservation is calculated directly by using the analytical expression of the total-energy transfer, and the forward energy cascade is observed clearly.

Naoto Yokoyama; Masanori Takaoka

2014-12-09T23:59:59.000Z

482

Stress dependent oxidation of sputtered niobium and effects on superconductivity  

SciTech Connect (OSTI)

We report on the suppression of room temperature oxidation of DC sputtered niobium films and the effects upon the superconductive transition temperature, T{sub c}. Niobium was sputter-deposited on silicon dioxide coated 150?mm wafers and permitted to oxidize at room temperature and pressure for up to two years. Resistivity and stress measurements indicate that tensile films greater than 400?MPa resist bulk oxidation with measurements using transmission electron microscope, electron dispersive X-ray spectroscopy, x-ray photoelectric spectroscopy, and secondary ion mass spectrometry confirming this result. Although a surface oxide, Nb{sub 2}O{sub 5}, consumed the top 6–10?nm, we measure less than 1 at. % oxygen and nitrogen in the bulk of the films after the oxidation period. T{sub c} measurements using a SQUID magnetometer indicate that the tensile films maintained a T{sub c} approaching the dirty superconductive limit of 8.4?K after two years of oxidation while maintaining room temperature sheet resistance. This work demonstrates that control over niobium film stress during deposition can prevent bulk oxidation by limiting the vertical grain boundaries ability to oxidize, prolonging the superconductive properties of sputtered niobium when exposed to atmosphere.

David Henry, M., E-mail: mdhenry@sandia.gov; Wolfley, Steve; Monson, Todd; Clark, Blythe G.; Shaner, Eric; Jarecki, Robert [Sandia National Labs, MESA Fabrication Facility PO Box 5800 MS 1084, Albuquerque, New Mexico 87185-1084 (United States)

2014-02-28T23:59:59.000Z

483

Graphite having improved thermal stress resistance and method of preparation  

DOE Patents [OSTI]

An improved method for fabricating a graphite article comprises the steps of impregnating a coke article by first heating the coke article in contact with a thermoplastic pitch at a temperature within the range of 250.degree.-300.degree. C. at a pressure within the range of 200-2000 psig for at least 4-10 hours and then heating said article at a temperature within the range of 450.degree.-485.degree. C. at a pressure of 200-2000 psig for about 16-24 hours to provide an impregnated article; heating the impregnated article for sufficient time to carbonize the impregnant to provide a second coke article, and graphitizing the second coke article. A graphite having improved thermal stress resistance results when the coke to be impregnated contains 1-3 wt.% sulfur and no added puffing inhibitors. An additional improvement in thermal stress resistance is achieved when the second coke article is heated above about 1400.degree. C. at a rate of at least 10.degree. C./minute to a temperature above the puffing temperature.

Kennedy, Charles R. (Oak Ridge, TN)

1980-01-01T23:59:59.000Z

484

Multi-Phase Fracture-Matrix Interactions Under Stress Changes  

SciTech Connect (OSTI)

The main objectives of this project are to quantify the changes in fracture porosity and multi-phase transport properties as a function of confining stress. These changes will be integrated into conceptual and numerical models that will improve our ability to predict and optimize fluid transport in fractured system. This report details our progress on: (a) developing the direct experimental measurements of fracture aperture and topology and fluid occupancy using high-resolution x-ray micro-tomography, (b) counter-current fluid transport between the matrix and the fracture, (c) studying the effect of confining stress on the distribution of fracture aperture and two-phase flow, and (d) characterization of shear fractures and their impact on multi-phase flow. The three-dimensional surface that describes the large-scale structure of the fracture in the porous medium can be determined using x-ray micro-tomography with significant accuracy. Several fractures have been scanned and the fracture aperture maps have been extracted. The success of the mapping of fracture aperture was followed by measuring the occupancy of the fracture by two immiscible phases, water and decane, and water and kerosene. The distribution of fracture aperture depends on the effective confining stress, on the nature of the rock, and the type and distribution of the asperities that keep the fracture open. Fracture apertures at different confining stresses were obtained by micro-tomography covering a range of about two thousand psig. Initial analysis of the data shows a significant aperture closure with increase in effective confining stress. Visual and detailed descriptions of the process are shown in the report. Both extensional and shear fractures have been considered. A series of water imbibition tests were conducted in which water was injected into a fracture and its migration into the matrix was monitored with CT and DR x-ray techniques. The objective was to understand the impact of the fracture, its topology and occupancy on the nature of mass transfer between the matrix and the fracture. Counter-current imbibition next to the fracture was observed and quantified, including the influence of formation layering. A group of Shear fractures were studied, with layers perpendicular and parallel to the main axis of the sample. The structures of the fractures as well as their impact on absolute permeability and on oil displacement by water were evaluated. Shear fractures perpendicular to the layers lead to a wide distribution of pores and to an overall increase in absolute permeability. Shear fractures parallel to the layers lead to an overall increase in absolute permeability, but a decrease in displacement efficiency. This DoE project funded or partially funded three Ph.D. and four M.Sc. students at the Pennsylvania State University. The results from the research have yielded several abstracts, presentations and papers. Much of the work is still in the process of being published.

A.S. Grader; D. Elsworth; P.M. Halleck; F. Alvarao; A. Alajmi; Z. Karpyn; N. Mohammed; S. Al-Enezi

2005-12-07T23:59:59.000Z

485

Contact and Stress Anisotropies in Start-Up Flow of Colloidal Suspensions |  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Contact and Stress Anisotropies in Start-Up Flow of Colloidal Suspensions Contact and Stress Anisotropies in Start-Up Flow of Colloidal Suspensions Submitted by Anonymous on November 3, 2011 - 12:52 Authors: Martys, N.S., Lootens, D., George, W., and H Spatiotemporal correlations in start-up flows of attractive colloids are explored by numerical simulations as a function of their volume fraction and shear rate. The suspension is first allowed to flocculate during a time tw, then the stress necessary to induce its flow is computed. We find that, at low volume fractions, the stress is a universal function of the strain. On the contrary, at high volume fractions, this scaling behavior is no longer observed and a supplementary stress becomes necessary to induce flow. To better understand the physical origin of the supplementary stress,

486

STRESS AND FAULTING IN THE COSO GEOTHERMAL FIELD: UPDATE AND RECENT RESULTS  

Open Energy Info (EERE)

STRESS AND FAULTING IN THE COSO GEOTHERMAL FIELD: UPDATE AND RECENT RESULTS STRESS AND FAULTING IN THE COSO GEOTHERMAL FIELD: UPDATE AND RECENT RESULTS FROM THE EAST FLANK AND COSO WASH Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Proceedings: STRESS AND FAULTING IN THE COSO GEOTHERMAL FIELD: UPDATE AND RECENT RESULTS FROM THE EAST FLANK AND COSO WASH Details Activities (1) Areas (1) Regions (0) Abstract: We integrate new geologic mapping and measurements of stress orientations and magnitudes from wells 34-9RD2 and 58A-10 with existing data sets to refine a geomechanical model for the Coso geothermal field. Vertically averaged stress orientations across the field are fairly uniform and are consistent with focal mechanism inversions of earthquake clusters for stress and incremental strain. Active faults trending NNW-SSE to

487

Borehole Imaging of In Situ Stress Tests at Mirror Lake Research Site |  

Open Energy Info (EERE)

Borehole Imaging of In Situ Stress Tests at Mirror Lake Research Site Borehole Imaging of In Situ Stress Tests at Mirror Lake Research Site Jump to: navigation, search OpenEI Reference LibraryAdd to library Web Site: Borehole Imaging of In Situ Stress Tests at Mirror Lake Research Site Author U.S. Geological Survey Published U.S. Geological Survey, 2013 DOI Not Provided Check for DOI availability: http://crossref.org Online Internet link for Borehole Imaging of In Situ Stress Tests at Mirror Lake Research Site Citation U.S. Geological Survey. Borehole Imaging of In Situ Stress Tests at Mirror Lake Research Site [Internet]. 2013. U.S. Geological Survey. [cited 2013/10/16]. Available from: http://water.usgs.gov/ogw/bgas/toxics/ml_bips.html Retrieved from "http://en.openei.org/w/index.php?title=Borehole_Imaging_of_In_Situ_Stress_Tests_at_Mirror_Lake_Research_Site&oldid=688729"

488

Shallow hydraulic fracturing measurements in Korea support tectonic and seismic indicators of regional stress.  

SciTech Connect (OSTI)

We have conducted five hydraulic fracturing stress measurement campaigns in Korea, involving 13 test holes ranging in depth from 30 to 250 m, at locations from North Seoul to the southern coast of the peninsula. The measurements reveal consistent crustal stress magnitudes and directions that suggest persistence throughout western and southern Korea. The maximum horizontal stress {sigma}{sub H} is oriented between ENE-WSW and E-W, in accord with plate movement and deformation, and with directions indicated by both focal mechanism solutions from earthquakes inland and offshore as well as borehole breakouts in mainland China close to its eastern coast. With respect to magnitudes, the vertical stress is the overall minimum stress at all tested locations, suggesting a thrust faulting regime within the relatively shallow depths reached by our tests. Typically, such a stress regime becomes one favoring strike-slip at greater depths, as is also indicated by the focal mechanism solutions around Korea.

Haimson, Bezalel Cecil (University of Wisconsin, Madison, WI); Lee, Moo Yul; Song, I. (Ruhr-University Bochum, Bochum, Germany)

2003-07-01T23:59:59.000Z

489

Grain-scale thermoelastic stresses and spatiotemporal temperature gradients on airless bodies, implications for rock breakdown  

E-Print Network [OSTI]

Thermomechanical processes such as fatigue and shock have been suggested to cause and contribute to rock breakdown on Earth, and on other planetary bodies, particularly airless bodies in the inner solar system. In this study, we modeled grain-scale stresses induced by diurnal temperature variations on simple microstructures made of pyroxene and plagioclase on various solar system bodies. We found that a heterogeneous microstructure on the Moon experiences peak tensile stresses on the order of 100 MPa. The stresses induced are controlled by the coefficient of thermal expansion and Young's modulus of the mineral constituents, and the average stress within the microstructure is determined by relative volume of each mineral. Amplification of stresses occurs at surface-parallel boundaries between adjacent mineral grains and at the tips of pore spaces. We also found that microscopic spatial and temporal surface temperature gradients do not correlate with high stresses, making them inappropriate proxies for investig...

Molaro, Jamie L; Langer, Steve A

2015-01-01T23:59:59.000Z

490

Seabed shear stresses under irregular waves plus current from Monte Carlo simulations of parameterized models  

Science Journals Connector (OSTI)

Shear stresses on a rough seabed under irregular waves plus current are calculated. Parameterized models valid for regular waves plus current have been used in Monte Carlo simulations, assuming the wave amplitudes to be Rayleigh-distributed. Numerical estimates of the probability distribution functions are presented. For waves only, the shear stress maxima follow a Weibull distribution, while for waves plus current, both the maximum and time-averaged shear stresses are well represented by a three-parameter Weibull distribution. The behaviour of the maximum shear stresses under a wide range of wave-current conditions has been investigated, and it appears that under certain conditions, the current has a significant influence on the maximum shear stresses. Results of comparison between predictions and measurements of the maximum bottom shear stresses from laboratory and field experiments are presented.

Lars Erik Holmedal; Dag Myrhaug; Håvard Rue

2000-01-01T23:59:59.000Z

491

In situ measurements of stress evolution in silicon thin films during  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

In situ measurements of stress evolution in silicon thin films during In situ measurements of stress evolution in silicon thin films during electrochemical lithiation and delithiation Title In situ measurements of stress evolution in silicon thin films during electrochemical lithiation and delithiation Publication Type Journal Article Year of Publication 2010 Authors Sethuraman, Vijay A., Michael J. Chon, Maxwell Shimshak, Venkat Srinivasan, and Pradeep R. Guduru Journal Journal of Power Sources Volume 195 Start Page 5062 Issue 15 Pagination 5062-5066 Date Published 08/2010 Keywords In situ stress measurement, Lithium-ion battery, Mechanical dissipation, Multi-beam optical sensor (MOS), Open-circuit relaxation, Silicon anode Abstract We report in situ measurements of stress evolution in a silicon thin-film electrode during electrochemical lithiation and delithiation by using the multi-beam optical sensor (MOS) technique. Upon lithiation, due to substrate constraint, the silicon electrode initially undergoes elastic deformation, resulting in rapid rise of compressive stress. The electrode begins to deform plastically at a compressive stress of ca. -1.75 GPa; subsequent lithiation results in continued plastic strain, dissipating mechanical energy. Upon delithiation, the electrode first undergoes elastic straining in the opposite direction, leading to a tensile stress of ca. 1 GPa; subsequently, it deforms plastically during the rest of delithiation. The plastic flow stress evolves continuously with lithium concentration. Thus, mechanical energy is dissipated in plastic deformation during both lithiation and delithiation, and it can be calculated from the stress measurements; we show that it is comparable to the polarization loss. Upon current interruption, both the film stress and the electrode potential relax with similar time constants, suggesting that stress contributes significantly to the chemical potential of lithiated silicon.

492

Surface roughening, columnar growth and intrinsic stress formation in amorphous CuTi films  

SciTech Connect (OSTI)

The growth of amorphous CuTi films, prepared by electron beam evaporation, is investigated by Scanning Tunneling Microscopy (STM), Small Angle Neutron Scattering (SANS) and in situ measurements of intrinsic mechanical stresses (ISM). In early growth stages the films develop compressive stresses and, with increasing film thickness, a crossover to tensile stresses. In the same thickness range the STM investigations show a change in the growth mode. The experiments suggest a transition from planar growth with statistical surface roughening to columnar growth.

Huelsen, U.V.; Geyer, U. [Physikalisches Inst., Goettingen (Germany); Thiyagarajan, P. [Argonne National Lab., IL (United States)

1997-11-01T23:59:59.000Z

493

On the stress distribution in a thin rectangular plate subjected to shear  

E-Print Network [OSTI]

Average Stress, g difference in these Stresses, %max (Theoretica1) ) 'f max (Experimental), gmax (Exeter. ) vs g of C~ (Theo. ), ~rs. ~ 0 ~ ~ 0 Values of "+~" Ca1culated from ELemen- tary Beam Theory for Plate- (2 x 860) ~ ~ ~ ~ ~ /1 and Mrs t 1...) '( thin rectangu3. ar plate The theory of photoelasticity vas employed throughout the observations Ordinarily, it is assumed Chat such a shear stress is distributed uniformly over the section normal to the axis of the body~ in which case...

Travis, Darol Duane

2012-06-07T23:59:59.000Z

494

Orientation of hydraulic fractures in SALT under hydrostatic and non-hydrostatic stresses  

SciTech Connect (OSTI)

A series of laboratory experiments were performed to determine the influence of deviatoric in situ stress on the form and orientation of hydraulic fractures in salt. The principal hydraulic fracturing tests were run on prismatic blocks confined in a polyaxial loading frame using flatjacks. The vertical stress and the minimum horizontal stress were 10.3 MPa for all tests. The maximum horizontal stress was varied form 10.3 MPa to 15.5 MPa to provide a range of horizontal stress ratios from 1.0 (hydrostatic) to 1.5. The fracturing oil contained a fluorescent dye that marked the fracture traces for mapping after the samples were split. At high stress ratios (1.5) the hydraulic fractures formed as two distinct traces emanating from opposite sides of the borehole in the maximum horizontal stress direction. At progressively lower stress ratios the orientations of the fractures varied about the maximum stress direction, and the fracture traces tended to branch. At stress ratios below between 1.10 and 1.13 the fracture no longer appeared to have an orientation controlled by the in situ stress directions. The results indicate that the form of the hydraulic fracture reflects whether or not the stresses are nearly hydrostatic. Fracture form can be determined by mapping dyed hydraulic fractures underground. The fractures should be made in portions of an underground facility that are to be excavated, and the fractures should be mapped as the excavation proceeds through the area of fracturing. 2 refs., 13 figs., 2 tabs.

Doe, T.W.; Boyce, G.M.; Andrews, R.

1987-06-01T23:59:59.000Z

495

Electron paramagnetic resonance effect in nylon 6 in stress: the effect of additives  

E-Print Network [OSTI]

are ruptured free radicals are formed and. can be detected directjy. An electron paramagnetic resonance (EPR) spectrometer was employed to monitor the bonds broken in nylon 6 fibers in stress. Tests were conducted on essential+ pure nylon 6 fibers... paramagnetic resonance spectrum of nylon 6 in stress. Free radical concentration versus time at constant load for nylon 6. 22 Free radical decay in nylon 6 after removal of load. Electron paramagnetic resonance spectrum produced 'hy stressing nylon 6...

Cragar, Darryl Edward

2012-06-07T23:59:59.000Z

496

E-Print Network 3.0 - acute restraint stress Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

(swim stress) produced... by acute ... Source: Spencer, Robert L. - Department of Psychology, University of Colorado at Boulder Collection: Biology and Medicine 2 ppmephysical...

497

Low Alloy Steel Susceptibility to Stress Corrosion Cracking in Hydraulic Fracturing Environment.  

E-Print Network [OSTI]

??The pipelines used for hydraulic fracturing (aka. "fracking") are often operating at a pressure above 10000psi and thus are highly susceptible to Stress Corrosion Cracking… (more)

Anyanwu, Ezechukwu John

2014-01-01T23:59:59.000Z

498

E-Print Network 3.0 - adenosine stress tl-201 Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

proteins Summary: protein; T84 cells; ADENOSINE IS A PURINE NUCLEOSIDE generated by ATP catabolism at sites of tissue stress... Agonist-induced polarized trafficking and...

499

E-Print Network 3.0 - adenosine stressed 99tcm-mibi Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

proteins Summary: protein; T84 cells; ADENOSINE IS A PURINE NUCLEOSIDE generated by ATP catabolism at sites of tissue stress... Agonist-induced polarized trafficking and...

500

E-Print Network 3.0 - ambient dehydration stress Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

of 2.5 MPa and refilled. Dehydration... ). Stressed seg- ments were ... Source: Stiller, Volker - Department of Biological Sciences, Southeastern Louisiana University...