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2008

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Articles 84331 - 84360 of 92805

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Hartmann Flow With Braginsky Viscosity: A Test Problem For Plasma In The Intracluster Medium, M. Lyutikov Jan 2008

Hartmann Flow With Braginsky Viscosity: A Test Problem For Plasma In The Intracluster Medium, M. Lyutikov

Department of Physics and Astronomy Faculty Publications

We consider a Hartmann layer, stationary flow of a viscose and resistive fluid between two plates with superimposed transverse magnetic field, in the limit of gyrotropic plasma, when viscosity across the field is strongly suppressed. For zero cross-field viscosity, the problem is not well posed, since viscosity then vanishes on the boundaries and in the middle of the layer, where there is no longitudinal field. An additional arbitrarily small isotropic viscosity allows one to find magnetic field and velocity profiles that are independent of this viscosity floor and different from flows with isotropic viscosity. Velocity sharply rises in a thin …

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The Trails Of Superluminal Jet Components In 3c 111, M. Kadler, E. Ros, M. Perucho, Y. Y. Kovalev, D. C. Homan, I. Agudo, K. I. Kellermann, M. F. Aller, H. D. Aller, M. L. Lister, J. A. Zensus Jan 2008

The Trails Of Superluminal Jet Components In 3c 111, M. Kadler, E. Ros, M. Perucho, Y. Y. Kovalev, D. C. Homan, I. Agudo, K. I. Kellermann, M. F. Aller, H. D. Aller, M. L. Lister, J. A. Zensus

Department of Physics and Astronomy Faculty Publications

In 1996 a major radio flux density outburst occurred in the broad-line radio galaxy 3C 111. It was followed by a particularly bright plasma ejection associated with a superluminal jet component, which has shaped the parsec-scale structure of 3C 111 for almost a decade. Here we present results from 18 epochs of Very Long Baseline Array (VLBA) observations conducted since 1995 as part of the VLBA 2 cm Survey and MOJAVE monitoring programs. This major event allows us to study a variety of processes associated with outbursts of radio-loud AGNs in much greater detail than has been possible in other …

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The Tev Energy Spectrum Of Markarian 421 Measured In A High Flaring State, A. Konopelko, W. Cui, C. Duke, J. P. Finley Jan 2008

The Tev Energy Spectrum Of Markarian 421 Measured In A High Flaring State, A. Konopelko, W. Cui, C. Duke, J. P. Finley

Department of Physics and Astronomy Faculty Publications

The BL Lac object (blazar) Mrk 421 was observed during its outburst in 2004 April with the Whipple 10 m telescope for a total of about 24.5 hr. The measured gamma-ray rate varied substantially over the range from 4 to 10 minute(-1) and eventually exceeded the steady gamma-ray rate of the Crab Nebula (standard candle) by a factor of 3. The overall significance of the gamma-ray signal exceeded 70 sigma and the total number of excess events was more than 10,000. This unique Mrk 421 outburst enabled the measurement of a high-quality spectrum of very high energy gamma-rays in a …

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Observation Of Gamma-Ray Emission From The Galaxy M87 Above 250 Gev With Veritas, V. A. Acciari, M. Beilicke, G. Blaylock, S. M. Bradbury, J. H. Buckley, V. Bugaev, Y. Butt, O. Celik, A. Cesarini, L. Ciupik, P. Cogan, P. Colin, W. Cui, M. K. Daniel, C. Duke, T. Ergin, A. D. Falcone, S. J. Fegan, J. P. Finley, G. Finnegan, P. Fortin, L. F. Fortson, K. Gibbs, G. H. Gillanders, J. Grube, R. Guenette, G. Gyuk, D. Hanna, E. Hays, J. Holder, D. Horan, S. B. Hughes, M. C. Hui, T. B. Humensky, A. Imran, P. Kaaret, M. Kertzman, D. B. Kieda, J. Kildea, A. Konopelko, H. Krawczynski, F. Krennrich, M. J. Lang, S. Lebohec, K. Lee, G. Maier, A. Mccann, M. Mccutcheon, J. Millis, P. Moriarty, R. Mukherjee, T. Nagai, R. A. Ong, D. Pandel, J. S. Perkins, M. Pohl, J. Quinn, K. Ragan, P. T. Reynolds, H. J. Rose, M. Schroedter, G. H. Sembroski, A. W. Smith, D. Steele, S. P. Swordy, A. Syson, J. A. Toner, L. Valcarcel, V. V. Vassiliev, S. P. Wakely, J. E. Ward, T. C. Weekes, A. Weinstein, R. J. White, D. A. Williams, S. A. Wissel, M. D. Wood, B. Zitzer Jan 2008

Observation Of Gamma-Ray Emission From The Galaxy M87 Above 250 Gev With Veritas, V. A. Acciari, M. Beilicke, G. Blaylock, S. M. Bradbury, J. H. Buckley, V. Bugaev, Y. Butt, O. Celik, A. Cesarini, L. Ciupik, P. Cogan, P. Colin, W. Cui, M. K. Daniel, C. Duke, T. Ergin, A. D. Falcone, S. J. Fegan, J. P. Finley, G. Finnegan, P. Fortin, L. F. Fortson, K. Gibbs, G. H. Gillanders, J. Grube, R. Guenette, G. Gyuk, D. Hanna, E. Hays, J. Holder, D. Horan, S. B. Hughes, M. C. Hui, T. B. Humensky, A. Imran, P. Kaaret, M. Kertzman, D. B. Kieda, J. Kildea, A. Konopelko, H. Krawczynski, F. Krennrich, M. J. Lang, S. Lebohec, K. Lee, G. Maier, A. Mccann, M. Mccutcheon, J. Millis, P. Moriarty, R. Mukherjee, T. Nagai, R. A. Ong, D. Pandel, J. S. Perkins, M. Pohl, J. Quinn, K. Ragan, P. T. Reynolds, H. J. Rose, M. Schroedter, G. H. Sembroski, A. W. Smith, D. Steele, S. P. Swordy, A. Syson, J. A. Toner, L. Valcarcel, V. V. Vassiliev, S. P. Wakely, J. E. Ward, T. C. Weekes, A. Weinstein, R. J. White, D. A. Williams, S. A. Wissel, M. D. Wood, B. Zitzer

Department of Physics and Astronomy Faculty Publications

The multiwavelength observation of the nearby radio galaxy M87 provides a unique opportunity to study in detail processes occurring in active galactic nuclei from radio waves to TeV gamma-rays. Here we report the detection of gamma-ray emission above 250 GeV from M87 in spring 2007 with the VERITAS atmospheric Cerenkov telescope array and discuss its correlation with the X-ray emission. The gamma-ray emission is measured to be pointlike with an intrinsic source radius less than 4.5'. The differential energy spectrum is fitted well by a power-law function: d Phi/dE = (7.4 +/- 1.3(stat) +/- 1.5(sys))(E/TeV)((-2.31 +/- 0.17stat +/- 0.2sys)) 10(-9) …

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Hollo-Bolt®: Blind Connector For Structural Steelwork, Purdue Ect Team Jan 2008

Hollo-Bolt®: Blind Connector For Structural Steelwork, Purdue Ect Team

ECT Fact Sheets Archive

Structural steel connections for connecting to square, rectangular or circular structural tube or to conventional steel where access is available from one side only poses problems. A technology was needed which could provide a quicker and tidier installation than traditional methods such as welding, unsightly strapping or drilling and tapping holes. The invention of the Hollo-Bolt® provided such a solution.

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Smartball™: Free Swimming Leak Detection System, Purdue Ect Team Jan 2008

Smartball™: Free Swimming Leak Detection System, Purdue Ect Team

ECT Fact Sheets Archive

Leak detection systems measure ultrasonic noise, infrared temperature variances or electrical flux to detect leakage in structures like, pipes, tanks, geo-membrane retaining structures etc. SmartBall® is a free flowing leak detection system developed by Pure Technologies. It consists of a foam ball that has a smaller aluminum ball at its core. This aluminum core houses an ultrasonic device that sends ultrasonic signals and also collects the reflected sound waves.

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Gas-Phonon Interaction Model For Subcontinuum Thermal Transport Simulations, Xiaohui Guo, Dhruv Singh, Jayathi Murthy, Alina A. Alexeenko Jan 2008

Gas-Phonon Interaction Model For Subcontinuum Thermal Transport Simulations, Xiaohui Guo, Dhruv Singh, Jayathi Murthy, Alina A. Alexeenko

School of Aeronautics and Astronautics Faculty Publications

Subcontinuum thermal transport problems such as the contact thermal resistance of semiconductor-gas interactions may play an important role in micro/nano-scale devices. In present work, a gas-phonon interaction modeling approach is suggested based on Boltzmann transport equations. Verification has been conducted by comparisons with asymptotic analytical solutions as well as previously reported numerical results and experimental data. Thermal transpiration in nano-sized channels and thermal resistance of nano-sized constrictions has been studied using the current model Thermal transpiration is the main mechanism for temperature driven pumps in nano/micro-devices. In order to maintain higher temperature ratio between the two ends of the gas …

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Use Of A Cfd Code In The Analysis Of Heat Transfer Surfaces, Mohammad Shekoor Talakala, T. P. Ashlok Babu Jan 2008

Use Of A Cfd Code In The Analysis Of Heat Transfer Surfaces, Mohammad Shekoor Talakala, T. P. Ashlok Babu

International Refrigeration and Air Conditioning Conference

No abstract provided.

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Supermarkets, Indoor Climate And Energy Efficiency - Field Measurements Before And After Installation Of Doors On Refrigerated Cases, Ulla Maria Lindberg, Monica Axell, Per Fahlaen, Niklas Fransson Jan 2008

Supermarkets, Indoor Climate And Energy Efficiency - Field Measurements Before And After Installation Of Doors On Refrigerated Cases, Ulla Maria Lindberg, Monica Axell, Per Fahlaen, Niklas Fransson

International Refrigeration and Air Conditioning Conference

No abstract provided.

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Analysis Of Ground Heat Exchangers For Geothermal Heat Pumps In Old Individual Houses, Odile Cauret, Pascal Dalicieux Jan 2008

Analysis Of Ground Heat Exchangers For Geothermal Heat Pumps In Old Individual Houses, Odile Cauret, Pascal Dalicieux

International Refrigeration and Air Conditioning Conference

No abstract provided.

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Effect Of Inclination Angle On The Air-Side Performance Of Aluminum Parallel Flow Heat Exchangers Under Wet Conditions, Naehyun Kim, Doyoung Kim, Yongmin Choi, Howon Byun, Junhyun Hwang Jan 2008

Effect Of Inclination Angle On The Air-Side Performance Of Aluminum Parallel Flow Heat Exchangers Under Wet Conditions, Naehyun Kim, Doyoung Kim, Yongmin Choi, Howon Byun, Junhyun Hwang

International Refrigeration and Air Conditioning Conference

No abstract provided.

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Void Fraction Measurement In Minichannels With In-Situ Calibration, Guillermo Portillo, Timothy A. Shedd, Kathryn H. Lehrer Jan 2008

Void Fraction Measurement In Minichannels With In-Situ Calibration, Guillermo Portillo, Timothy A. Shedd, Kathryn H. Lehrer

International Refrigeration and Air Conditioning Conference

No abstract provided.

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Boiling Heat Transfer And Pressure Drop Of A Refrigerant Flowing In A Vertical Small Diameter Tube, Kazushi Miyata, Hideo Mori, Katsumi Ohishi, Yoshinori Hamamoto Jan 2008

Boiling Heat Transfer And Pressure Drop Of A Refrigerant Flowing In A Vertical Small Diameter Tube, Kazushi Miyata, Hideo Mori, Katsumi Ohishi, Yoshinori Hamamoto

International Refrigeration and Air Conditioning Conference

No abstract provided.

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Research On The Air Conditioning Water Heater System, Fei Liu, Hu Huang, Yingjiang Ma, Rong Zhuang Jan 2008

Research On The Air Conditioning Water Heater System, Fei Liu, Hu Huang, Yingjiang Ma, Rong Zhuang

International Refrigeration and Air Conditioning Conference

No abstract provided.

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Absorption Resorption Cycle For Heat Recovery Of Diesel Engines Exhaust And Jacket Heat, Said Bouazzaoui, Carlos Infante Ferreira, Jürgen Langreck, Jan Gerritsen Jan 2008

Absorption Resorption Cycle For Heat Recovery Of Diesel Engines Exhaust And Jacket Heat, Said Bouazzaoui, Carlos Infante Ferreira, Jürgen Langreck, Jan Gerritsen

International Refrigeration and Air Conditioning Conference

No abstract provided.

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In-Situ Measurement Of Absorption Rates In Horizontal-Tube Falling-Film Ammonia-Water Absorbers: Part I – Measurement Technique, Sangsoo Lee, Lalit Kumar Bohra, Srinivas Garimella Jan 2008

In-Situ Measurement Of Absorption Rates In Horizontal-Tube Falling-Film Ammonia-Water Absorbers: Part I – Measurement Technique, Sangsoo Lee, Lalit Kumar Bohra, Srinivas Garimella

International Refrigeration and Air Conditioning Conference

No abstract provided.

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Analysis On Hollow Fiber Membrane Heat Exchanger Applying To The Lithium Bromide Absorption Refrigeration System, Zanshe Wang, Shiyu Feng, Yun Li, Zhaolin Gu Jan 2008

Analysis On Hollow Fiber Membrane Heat Exchanger Applying To The Lithium Bromide Absorption Refrigeration System, Zanshe Wang, Shiyu Feng, Yun Li, Zhaolin Gu

International Refrigeration and Air Conditioning Conference

No abstract provided.

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Analysis Of Expansion Waves Appearing In The Outlets Of Two-Phase Flow Nozzles, Masafumi Nakagawa, Atsushi Harada, Menandro Serrano Berana Jan 2008

Analysis Of Expansion Waves Appearing In The Outlets Of Two-Phase Flow Nozzles, Masafumi Nakagawa, Atsushi Harada, Menandro Serrano Berana

International Refrigeration and Air Conditioning Conference

No abstract provided.

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Analysis Of A Two Phase Flow Ejector For Transcritical Co2 Cycle, Fang Liu, Eckhard A. Groll Jan 2008

Analysis Of A Two Phase Flow Ejector For Transcritical Co2 Cycle, Fang Liu, Eckhard A. Groll

International Refrigeration and Air Conditioning Conference

No abstract provided.

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Hydrophilic Treatments Of Copper Finned Tube Evaporators, Jingchun Min, Xiaomin Wu, Frank Gao Jan 2008

Hydrophilic Treatments Of Copper Finned Tube Evaporators, Jingchun Min, Xiaomin Wu, Frank Gao

International Refrigeration and Air Conditioning Conference

No abstract provided.

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Co2 Stirling Heat Pump For Residential Use, David M. Berchowitz, Martien Janssen, Roberto O. Pellizzari Jan 2008

Co2 Stirling Heat Pump For Residential Use, David M. Berchowitz, Martien Janssen, Roberto O. Pellizzari

International Refrigeration and Air Conditioning Conference

No abstract provided.

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Modeling And Design Of An Indirect Air Conditioning System Operating With Low Gwp Zeotropic Mixtures, Marian Hamdar, Assaad Zoughaib, Denis F. F. Clodic Jan 2008

Modeling And Design Of An Indirect Air Conditioning System Operating With Low Gwp Zeotropic Mixtures, Marian Hamdar, Assaad Zoughaib, Denis F. F. Clodic

International Refrigeration and Air Conditioning Conference

No abstract provided.

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Determination Of Superior Surface Strains And Stresses, And Vocal Fold Contact Pressure In A Synthetic Larynx Model Using Digital Image Correlation, Mychal Spencer, Thomas Siegmund, Luc Mongeau Jan 2008

Determination Of Superior Surface Strains And Stresses, And Vocal Fold Contact Pressure In A Synthetic Larynx Model Using Digital Image Correlation, Mychal Spencer, Thomas Siegmund, Luc Mongeau

School of Mechanical Engineering Faculty Publications

No abstract provided.

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Theoretical Analysis Of The Effect Of Oil Atomization In The Cylinder Of A Reciprocating Ammonia Compressor, Rodrigo Kremer, Cesar J. Deschamps, Jader R. Barbosa Jan 2008

Theoretical Analysis Of The Effect Of Oil Atomization In The Cylinder Of A Reciprocating Ammonia Compressor, Rodrigo Kremer, Cesar J. Deschamps, Jader R. Barbosa

International Compressor Engineering Conference

No abstract provided.

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Reciprocating Compressor Program, Christophe Ancel, Pierre Ginies Jan 2008

Reciprocating Compressor Program, Christophe Ancel, Pierre Ginies

International Compressor Engineering Conference

No abstract provided.

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Air Compressor Systems For Passenger Rail Applications, Stanley Paul Schumann Jan 2008

Air Compressor Systems For Passenger Rail Applications, Stanley Paul Schumann

International Compressor Engineering Conference

No abstract provided.

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Analysis Of Set Of Valve From Hermetic Reciprocating Compressors Under Accelerated Life Test (Alt) By Alternative Machine In Replacement Of The Usual Compressor Bench Test, Jairo Aparecido Martins, Daniel L. Leite, Luiz G. Martins Jan 2008

Analysis Of Set Of Valve From Hermetic Reciprocating Compressors Under Accelerated Life Test (Alt) By Alternative Machine In Replacement Of The Usual Compressor Bench Test, Jairo Aparecido Martins, Daniel L. Leite, Luiz G. Martins

International Compressor Engineering Conference

No abstract provided.

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Isentropic And Volumetric Efficiencies For Compressors With Economizer Port, Klaus Jurgen Lambers Jan 2008

Isentropic And Volumetric Efficiencies For Compressors With Economizer Port, Klaus Jurgen Lambers

International Compressor Engineering Conference

No abstract provided.

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Variable-Speed Centrifugal Chiller Control For Variable Primary Flow (Vpf) Applications, Joost Brasz, Lee Tetu Jan 2008

Variable-Speed Centrifugal Chiller Control For Variable Primary Flow (Vpf) Applications, Joost Brasz, Lee Tetu

International Compressor Engineering Conference

No abstract provided.

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Stress And Deformation Analyses Of Twin-Spirals Scroll Plates Based On Cae, Bin Peng, Hongsheng Zhang, Li Zhang, Zhenquan Liu Jan 2008

Stress And Deformation Analyses Of Twin-Spirals Scroll Plates Based On Cae, Bin Peng, Hongsheng Zhang, Li Zhang, Zhenquan Liu

International Compressor Engineering Conference

No abstract provided.

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