Search Results - (Author, Cooperation:M. Richman)

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  1. 1
    M. G. Aartsen ; R. Abbasi ; Y. Abdou ; M. Ackermann ; J. Adams ; J. A. Aguilar ; M. Ahlers ; D. Altmann ; J. Auffenberg ; X. Bai ; M. Baker ; S. W. Barwick ; V. Baum ; R. Bay ; J. J. Beatty ; S. Bechet ; J. Becker Tjus ; K. H. Becker ; M. L. Benabderrahmane ; S. BenZvi ; P. Berghaus ; D. Berley ; E. Bernardini ; A. Bernhard ; D. Bertrand ; D. Z. Besson ; G. Binder ; D. Bindig ; M. Bissok ; E. Blaufuss ; J. Blumenthal ; D. J. Boersma ; S. Bohaichuk ; C. Bohm ; D. Bose ; S. Boser ; O. Botner ; L. Brayeur ; H. P. Bretz ; A. M. Brown ; R. Bruijn ; J. Brunner ; M. Carson ; J. Casey ; M. Casier ; D. Chirkin ; A. Christov ; B. Christy ; K. Clark ; F. Clevermann ; S. Coenders ; S. Cohen ; D. F. Cowen ; A. H. Cruz Silva ; M. Danninger ; J. Daughhetee ; J. C. Davis ; M. Day ; C. De Clercq ; S. De Ridder ; P. Desiati ; K. D. de Vries ; M. de With ; T. DeYoung ; J. C. Diaz-Velez ; M. Dunkman ; R. Eagan ; B. Eberhardt ; B. Eichmann ; J. Eisch ; R. W. Ellsworth ; S. Euler ; P. A. Evenson ; O. Fadiran ; A. R. Fazely ; A. Fedynitch ; J. Feintzeig ; T. Feusels ; K. Filimonov ; C. Finley ; T. Fischer-Wasels ; S. Flis ; A. Franckowiak ; K. Frantzen ; T. Fuchs ; T. K. Gaisser ; J. Gallagher ; L. Gerhardt ; L. Gladstone ; T. Glusenkamp ; A. Goldschmidt ; G. Golup ; J. G. Gonzalez ; J. A. Goodman ; D. Gora ; D. T. Grandmont ; D. Grant ; A. Gross ; C. Ha ; A. Haj Ismail ; P. Hallen ; A. Hallgren ; F. Halzen ; K. Hanson ; D. Heereman ; D. Heinen ; K. Helbing ; R. Hellauer ; S. Hickford ; G. C. Hill ; K. D. Hoffman ; R. Hoffmann ; A. Homeier ; K. Hoshina ; W. Huelsnitz ; P. O. Hulth ; K. Hultqvist ; S. Hussain ; A. Ishihara ; E. Jacobi ; J. Jacobsen ; K. Jagielski ; G. S. Japaridze ; K. Jero ; O. Jlelati ; B. Kaminsky ; A. Kappes ; T. Karg ; A. Karle ; J. L. Kelley ; J. Kiryluk ; J. Klas ; S. R. Klein ; J. H. Kohne ; G. Kohnen ; H. Kolanoski ; L. Kopke ; C. Kopper ; S. Kopper ; D. J. Koskinen ; M. Kowalski ; M. Krasberg ; K. Krings ; G. Kroll ; J. Kunnen ; N. Kurahashi ; T. Kuwabara ; M. Labare ; H. Landsman ; M. J. Larson ; M. Lesiak-Bzdak ; M. Leuermann ; J. Leute ; J. Lunemann ; J. Madsen ; G. Maggi ; R. Maruyama ; K. Mase ; H. S. Matis ; F. McNally ; K. Meagher ; M. Merck ; T. Meures ; S. Miarecki ; E. Middell ; N. Milke ; J. Miller ; L. Mohrmann ; T. Montaruli ; R. Morse ; R. Nahnhauer ; U. Naumann ; H. Niederhausen ; S. C. Nowicki ; D. R. Nygren ; A. Obertacke ; S. Odrowski ; A. Olivas ; A. O'Murchadha ; L. Paul ; J. A. Pepper ; C. Perez de los Heros ; C. Pfendner ; D. Pieloth ; E. Pinat ; J. Posselt ; P. B. Price ; G. T. Przybylski ; L. Radel ; M. Rameez ; K. Rawlins ; P. Redl ; R. Reimann ; E. Resconi ; W. Rhode ; M. Ribordy ; M. Richman ; B. Riedel ; J. P. Rodrigues ; C. Rott ; T. Ruhe ; B. Ruzybayev ; D. Ryckbosch ; S. M. Saba ; T. Salameh ; H. G. Sander ; M. Santander ; S. Sarkar ; K. Schatto ; F. Scheriau ; T. Schmidt ; M. Schmitz ; S. Schoenen ; S. Schoneberg ; A. Schonwald ; A. Schukraft ; L. Schulte ; O. Schulz ; D. Seckel ; Y. Sestayo ; S. Seunarine ; R. Shanidze ; C. Sheremata ; M. W. Smith ; D. Soldin ; G. M. Spiczak ; C. Spiering ; M. Stamatikos ; T. Stanev ; A. Stasik ; T. Stezelberger ; R. G. Stokstad ; A. Stossl ; E. A. Strahler ; R. Strom ; G. W. Sullivan ; H. Taavola ; I. Taboada ; A. Tamburro ; A. Tepe ; S. Ter-Antonyan ; G. Tesic ; S. Tilav ; P. A. Toale ; S. Toscano ; E. Unger ; M. Usner ; N. van Eijndhoven ; A. Van Overloop ; J. van Santen ; M. Vehring ; M. Voge ; M. Vraeghe ; C. Walck ; T. Waldenmaier ; M. Wallraff ; C. Weaver ; M. Wellons ; C. Wendt ; S. Westerhoff ; N. Whitehorn ; K. Wiebe ; C. H. Wiebusch ; D. R. Williams ; H. Wissing ; M. Wolf ; T. R. Wood ; K. Woschnagg ; D. L. Xu ; X. W. Xu ; J. P. Yanez ; G. Yodh ; S. Yoshida ; P. Zarzhitsky ; J. Ziemann ; S. Zierke ; M. Zoll
    American Association for the Advancement of Science (AAAS)
    Published 2013
    Staff View
    Publication Date:
    2013-11-23
    Publisher:
    American Association for the Advancement of Science (AAAS)
    Print ISSN:
    0036-8075
    Electronic ISSN:
    1095-9203
    Topics:
    Biology
    Chemistry and Pharmacology
    Computer Science
    Medicine
    Natural Sciences in General
    Physics
    Published by:
    http://www.aaas.org/

    Latest Papers from Table of Contents or Articles in Press
  2. 2
    Staff View
    Publication Date:
    2018-01-18
    Publisher:
    The American Society for Microbiology (ASM)
    Print ISSN:
    0022-538X
    Electronic ISSN:
    1098-5514
    Topics:
    Medicine
    Published by:
    http://www.asm.org/

    Latest Papers from Table of Contents or Articles in Press
  3. 3
    Jenkins, J. T. ; Richman, M. W.

    [S.l.] : American Institute of Physics (AIP)
    Published 1985
    Staff View
    ISSN:
    1089-7666
    Source:
    AIP Digital Archive
    Topics:
    Physics
    Notes:
    Grad's method of moments is employed to derive balance laws and constitutive relations for plane flows of a dense gas consisting of identical, rough, inelastic, circular disks. Two temperatures are involved; these are proportional to the kinetic energies associated with fluctuations in translational velocity and spin, respectively. When the single particle velocity distribution function is assumed to be close to a two-temperature Maxwellian, two distinct theories are obtained. One applies when the particles are almost smooth and the collisions between them are nearly elastic; the other applies to nearly elastic particles that, in a collision, almost reverse the relative velocity of their points of contact. I both cases energy is nearly conserved in collisions.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1063/1.865302

    Articles: DFG German National Licenses
  4. 4
    Staff View
    ISSN:
    0888-7543
    Source:
    Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics:
    Biology
    Medicine
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1016/0888-7543(90)90570-K

    Articles: DFG German National Licenses
  5. 5
    Richman, M. W. ; Chou, C. S.
    Springer
    Published 1989
    Staff View
    ISSN:
    1420-9039
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Mathematics
    Physics
    Description / Table of Contents:
    Zusammenfassung Wir entwickeln eine kinetische Theorie für die homogene Scherströmung von identischen Kugeln, in welcher die Zusammenstösse der Teilchen kleine Risse in ihrer Oberfläche verursachen und sich dadurch ihr mittlerer Durchmesser mit der Zeit verringert. Um die statistisch gemittelten konstitutiven Beziehungen für die Energiedissipations- und Massenverlustraten zu erhalten, verwenden wir den von Jenkins und Savage [1983] hergeleiteten Integralausdruck für die von den Kollisionen verursachte Quellenstärke einer Teilchenzustandsgrösse. Bei der Berechnung der Spannung verwenden wir jedoch einen abgeänderten Ausdruck für den Fluss durch Kollision; dadurch wird sichergestellt, dass der Spannungstensor symmetrisch ist, wenn die Kontaktkraft zwischen den Teilchen normal zur Kontaktebene wirkt. Die konstitutiven Beziehungen werden in die Gleichungen für die Erhaltung von Masse, Impuls und Energie eingesetzt, um zu berechnen, wie sich der Festkörperanteil, die Granulartemperatur und die induzierten Spannungen als Funktion der Zeit verändern; der Geschwindigkeitsgradient und die Anzahl Teilchen pro Volumen sind dabei konstant.
    Notes:
    Summary We derive a kinetic theory for homogeneous granular shear flows of identical spheres in which collisions between particles result in small fractures on their peripheries and, over time, effectively reduce their average diameter. In obtaining statistically averaged constitutive relations for the rates of energy dissipation and mass loss, we employ the integral expression derived by Jenkins and Savage [1983] for the collisional source of a particle property. However, in calculating the stress, we modify their expression for the collisional flux in order to ensure that the stress is symmetric when the particles interact through central forces. The constitutive relations are employed in the balance equations for mass, momentum, and energy in order to predict, for a fixed shear rate and particle number density, the manner in which the solid fraction, granular temperature, and induced stresses vary with time.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/BF00945809

    Articles: DFG German National Licenses
  6. 6
    Richman, M. W. ; Chou, C. S.
    Springer
    Published 1988
    Staff View
    ISSN:
    1420-9039
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Mathematics
    Physics
    Description / Table of Contents:
    Zusammenfassung Wir erhalten die Randbedingungen für die zweidimensionale Strömung identischer, beinahe elastischer, runder Scheiben, die sich in Wechselwirkung mit einer geraden Wand befinden, an der in gleichmäßigen Abständen Halbscheiben angebracht sind. Es werden Ausdrücke für die Übertragung von Impuls und Energie vom Rand auf den Strom aufgestellt, die durch den statisch errechneten Durchschnitt aller möglichen Scheibenkollisionen Wand-Strom erhalten werden. Wir verbessern die von Jenkins und Richman (1986) entwickelten Ausdrücke dadurch, daß bei der Berechnung der Mittelwerte eine erweiterte Geschwindigkeitsverteilung, die auf der Momentmethode beruht, einbezogen wurde. Außerdem entwickeln wir die Verteilungsfunktion an einem Punkt so nahe an der Wand, daß positive Gleitgeschwindigkeiten garantiert sind. Wir untersuchen eine zweidimensionale Scherströmung mit diesen Randbedingungen, die durch die parallelen unebenen Ränder getrieben wird. Die konstitutive Theorie, die wir anwenden, beinhaltet sowohl den Einfluß der Teilchenkollisionen als auch den des Teilchentransports auf die Übertragung von Impuls und Energie innerhalb der Strömung. Wir zeigen, wie die Profile der Geschwindigkeit, der Granu-lartemperatur und des Festkörperanteils, die sich ergeben, durch Veränderungen der Randgeometrie beeinflußt werden. Weiterhin können wir voraussagen, wie die erzeugten Spannungen sich mit der Randgeometrie und dem im Strom enthaltenen Festkörperanteil verändern.
    Notes:
    Summary We obtain boundary conditions for two-dimensional flows of identical, nearly elastic, circular disks that interact with a flat wall to which identical, evenly spaced half-disks have been attached. Expressions for the transfer of momentum and energy from the boundary to the flow are obtained by statistical averaging over all possible wall-flow disk collisions. We improve upon the expressions derived by Jenkins and Richman [1986] by employing in the averaging process a more elaborate velocity distribution function obtained through the method of moments. In addition we expand the distribution function about a point near the flat wall that guarantees positive slip velocities. With these boundary conditions, we analyze a two-dimensional shear flow driven by parallel bumpy boundaries. The constitutive theory employed includes both the effects of particle collisions and particle transport on the transfer of momentum and energy throughout the flow. We demonstrate how the resulting profiles of velocity, granular temperature, and solid fraction are affected by changes in the geometry of the boundary. We also predict how the induced stresses vary with the geometry of the boundary and the average solid fraction within the flow.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/BF00945125

    Articles: DFG German National Licenses
  7. 7
    Jenkins, J. T. ; Richman, M. W.
    Springer
    Published 1985
    Staff View
    ISSN:
    1432-0673
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Mathematics
    Physics
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/BF00250919

    Articles: DFG German National Licenses
  8. 8
    Staff View
    ISSN:
    1432-2218
    Keywords:
    Key Words: Cardiac hemodynamics — CO2 pneumoperitoneum — Inferior vena caval blood flow
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Medicine
    Notes:
    Abstract Background: The effects of carbon dioxide pneumoperitoneum on venous return and cardiac hemodynamics during laparoscopic surgery were studied. Methods: Twelve adult pigs underwent placement of an electromagnetic flow meter across the infrarenal vena cava (IVC) as well as placement of Swan Ganz and arterial monitoring catheters. Measurements of the flow through infrarenal IVC, cardiac output (CO), pulmonary capillary wedge pressure (PCWP), mean arterial pressure (MAP), and heart rate were recorded at baseline, 5 and 60 min following insufflation to 15 mmHg with CO2, and 5 min following desufflation. Stroke volumes and systemic vascular resistance (SVR) were calculated as well. Results: Flow through the IVC dropped by 24 and 31% at 5 and 60 min (p= 0.03 and 0.02, respectively). Paradoxically, cardiac output rose by 14 and 28% at 5 and 60 min (p= 0.03 at 60 min). Central venous and pulmonary capillary wedge pressures rose transiently by 35 and 36% at 5 min before returning to baseline (p 〈 0.01). Mean arterial pressure and heart rate remained relatively constant during insufflation. Systemic vascular resistance diminished from 938 dynes/cm/s prior to insufflation to its nadir at 60 min of 650 dynes/cm/s (p 〈 0.01). Conclusions: These observations suggest potentially complex interactions between the mechanical and systemic effects of the CO2 pneumoperitoneum on venous return. Transient elevations in cardiac filling pressures occur by an unknown mechanism, and a generalized enhanced inotropic state mediated via increased sympathetic outflow is observed in this hypercapnic anesthetized animal model.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/s004649900198

    Articles: DFG German National Licenses
  9. 9
    Staff View
    ISSN:
    1573-1480
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Geosciences
    Physics
    Notes:
    Abstract The "temperature" breakout group at the 1997 Asheville Workshop on Indicators and Indices for Climate Extremes reviewed and developed the rationale for a choice of temperature indices for monitoring changes in climate extremes, and the supporting data required. A set of basic and supplementary key indices was drawn up. The key indices are meant to be easy to interpret, be relevant to the practical concerns of policy makers and others in the public sector and provide potential inputs into the Third Assessment Review of the Intergovernmental Panel on Climate Change that is expected to report in 2001. The indices are expressed in various ways to facilitate spatial and temporal trend detection and impact analysis. There is flexibility in the number and the form of the indices identified and the choice for any particular application is subject to further analysis and prioritization. The success of this endeavor will depend on original work being done to further develop the indices and on the cooperation of organizations globally to provide the data necessary for the development and the implementation of the indices. This paper summarizes the group's recommendations.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1023/A:1005447712757

    Articles: DFG German National Licenses
  10. 10
    Danforth, S. C. ; Richman, M. H.
    Springer
    Published 1979
    Staff View
    ISSN:
    1573-4803
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/BF01028353

    Articles: DFG German National Licenses
  11. 11
    Staff View
    ISSN:
    1432-2218
    Keywords:
    Cardiac hemodynamics ; CO2 pneumoperitoneum ; Inferior vena caval blood flow
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Medicine
    Notes:
    Abstract Background: The effects of carbon dioxide pneumoperitoneum on venous return and cardiac hemodynamics during laparoscopic surgery were studied. Methods: Twelve adult pigs underwent placement of an electromagnetic flow meter across the infrarenal vena cava (IVC) as well as placement of Swan Ganz and arterial monitoring catheters. Measurements of the flow through infrarenal IVC, cardiac output (CO), pulmonary capillary wedge pressure (PCWP), mean arterial pressure (MAP), and heart rate were recorded at baseline, 5 and 60 min following insufflation to 15 mmHg with CO2, and 5 min following desufflation. Stroke volumes and systemic vascular resistance (SVR) were calculated as well. Results: Flow through the IVC dropped by 24 and 31% at 5 and 60 min (p=0.03 and 0.02, respectively). Paradoxically, cardiac output rose by 14 and 28% at 5 and 60 min (p=0.03 at 60 min). Central venous and pulmonary capillary wedge pressures rose transiently by 35 and 36% at 5 min before returning to baseline (p〈0.01). Mean arterial pressure and heart rate remained relatively constant during insufflation. Systemic vascular resistance diminished from 938 dynes/cm/s prior to insufflation to its nadir at 60 min of 650 dynes/cm/s (p〈0.01). Conclusions: These observations suggest potentially complex interactions between the mechanical and systemic effects of the CO2 pneumoperitoneum on venous return. Transient elevations in cardiac filling pressures occur by an unknown mechanism, and a generalized enhanced inotropic state mediated via increased sympathetic outflow is observed in this hypercapnic anesthetized animal model.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/BF00188484

    Articles: DFG German National Licenses
  12. 12
    Richman, M. W.
    Springer
    Published 1988
    Staff View
    ISSN:
    1619-6937
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Physics
    Notes:
    Summary We focus attention on the rapid flows of identical, smooth, nearly elastic spheres and introduce a statistical description of the spheres' velocities. Based upon a velocity distribution function that contains improvements to the Maxwellian, we calculate the rate at which momentum and energy are transferred across bumpy boundaries and obtain conditions that ensure the balance of momentum and energy at such boundaries. Using these conditions we carry out an approximate analysis of a granular shear flow driven by bumpy boundaries to obtain an explicit dependence of the slip velocity and resulting stresses on boundary roughness. Finally, we compare these results to those obtained by employing a theory based on a simple Maxwellian velocity distribution.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/BF01174637

    Articles: DFG German National Licenses
  13. 13
    Jennings, H. M. ; Danforth, S. C. ; Richman, M. H.
    Springer
    Published 1979
    Staff View
    ISSN:
    1573-4803
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/BF00550741

    Articles: DFG German National Licenses
  14. 14
    Danforth, S. C. ; Jennings, H. M. ; Richman, M. H.
    Springer
    Published 1978
    Staff View
    ISSN:
    1573-4803
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/BF00553218

    Articles: DFG German National Licenses
  15. 15
    Gregory, O. J. ; Richman, M. H.
    Springer
    Published 1984
    Staff View
    ISSN:
    1573-4811
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/BF00723090

    Articles: DFG German National Licenses