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569 Matching Results
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Nonabelian Monopoles
We study topological as well as dynamical properties of BPS nonabelian magnetic monopoles of Goddard-Nuyts-Olive-Weinberg type in $ G=SU(N)$, $USp(2N)$ and SO(N) gauge theories, spontaneously broken to nonabelian subgroups $H$. We find that monopoles transform under the group dual to $H$ in a tensor representation of rank determined by the corresponding element in $\pi_1(H)$. When the system is embedded in a $\cal N=2$ supersymmetric theory with an appropriate set of flavors with appropriate bare masses, the BPS monopoles constructed semiclassically persist in the full quantum theory. This result supports the identification of"dual quarks'' found at $r$-vacua of $\cal N=2$ theories with the nonabelian magnetic monopoles. We present several consistency checks of our monopole spectra.
Date:
June 23, 2004
Creator:
Auzzi, Roberto; Bolognesi, Stefano; Evslin, Jarah; Konishi, Kenichi & Murayama, Hitoshi
Object Type:
Article
System:
The UNT Digital Library
Evaluation of 2004 Toyota Prius Hybrid Electric Drive System Interim Report
Laboratory tests were conducted to evaluate the electrical and mechanical performance of the 2004 Toyota Prius and its hybrid electric drive system. As a hybrid vehicle, the 2004 Prius uses both a gasoline-powered internal combustion engine and a battery-powered electric motor as motive power sources. Innovative algorithms for combining these two power sources results in improved fuel efficiency and reduced emissions compared to traditional automobiles. Initial objectives of the laboratory tests were to measure motor and generator back-electromotive force (emf) voltages and determine gearbox-related power losses over a specified range of shaft speeds and lubricating oil temperatures. Follow-on work will involve additional performance testing of the motor, generator, and inverter. Information contained in this interim report summarizes the test results obtained to date, describes preliminary conclusions and findings, and identifies additional areas for further study.
Date:
November 23, 2004
Creator:
Ayers, C.W.
Object Type:
Report
System:
The UNT Digital Library
PROCEEDINGS OF RIKEN BNL RESEARCH CENTER WORKSHOP, VOLUME 62 NEW DESCOVERIES AT RHIC, MAY 14-15, 2004.
None
Date:
June 23, 2004
Creator:
BUSZA,W. GYULASSY,M. MCLERRAN,L.
Object Type:
Report
System:
The UNT Digital Library
Energy Policy: The Continuing Debate and Omnibus Energy Legislation
This report includes background and analysis of energy policy. Points of discussion include the Arctic National Wildlife Refuge, nuclear energy, and renewable energy and fuels.
Date:
December 23, 2004
Creator:
Bamberger, Robert L.
Object Type:
Report
System:
The UNT Digital Library
Energy Policy: The Continuing Debate and Omnibus Energy Legislation
This report includes background and analysis of energy policy. Points of discussion include the Arctic National Wildlife Refuge, nuclear energy, and renewable energy and fuels.
Date:
February 23, 2004
Creator:
Bamberger, Robert L.
Object Type:
Report
System:
The UNT Digital Library
Initial scientific uses of coherent synchrotron radiation inelectron storage rings
The production of stable, high power, coherent synchrotron radiation at sub-terahertz frequency at the electron storage ring BESSY opens a new region in the electromagnetic spectrum to explore physical properties of materials. Just as conventional synchrotron radiation has been a boon to x-ray science, coherent synchrotron radiation may lead to many new innovations and discoveries in THz physics. With this new accelerator-based radiation source we have been able to extend traditional infrared measurements down into the experimentally poorly accessible sub-THz frequency range. The feasibility of using the coherent synchrotron radiation in scientific applications was demonstrated in a series of experiments: We investigated shallow single acceptor transitions in stressed and unstressed Ge:Ga by means of photoconductance measurements below 1 THz. We have directly measured the Josephson plasma resonance in optimally doped Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8} for the first time and finally we succeeded to confine the sub-THz radiation for spectral near-field imaging on biological samples such as leaves and human teeth.
Date:
November 23, 2004
Creator:
Basov, D. N.; Feikes, J.; Fried, D.; Holldack, K.; Hubers, H. W.; Kuske, P. et al.
Object Type:
Article
System:
The UNT Digital Library
Measurement of cross sections for the 63Cu(alpha,gamma)67Ga reaction from 5.9-8.7 MeV
We have measured cross sections for the 63Cu(alpha,gamma)67Ga reaction in the 5.9-8.7 MeV energy range using an activation technique. Natural Cu foils were bombarded with alpha beams from the 88 Cyclotron at Lawrence Berkeley National Laboratory (LBNL). Activated foils were counted using gamma spectrometry system at LBNL's Low Background Facility. The 63Cu(alpha,gamma)67Ga cross-sections were determined and compared with the latest NON-SMOKER theoretical values. Experimental cross sections were found to be in agreement with theoretical values.
Date:
September 23, 2004
Creator:
Basunia, M. Shamsuzzoha; Norman, Eric B.; Shugart, Howard A.; Smith, Alan R.; Dolinski, Michelle J. & Quiter, Brian J.
Object Type:
Article
System:
The UNT Digital Library
Marginal Stability of Microturbulence near ITB Onset on Alcator C-Mod
Insight into microturbulence and transport in tokamak plasmas is being sought using linear simulations of drift waves near the onset time of an internal transport barrier (ITB) on Alcator C-Mod. Microturbulence is likely generated by instabilities of drift waves and causes transport of heat and particles. This transport is studied because the containment of heat and particles is important for the achievement of practical nuclear fusion. We investigate nearness to marginal stability of ion-temperature-gradient (ITG) modes for conditions in the ITB region at the trigger time for ITB formation. Data from C-Mod, analyzed by TRANSP (a time-dependent transport analysis code), is read by the code TRXPL and made into input files for the parallel gyrokinetic model code GS2. Temperature and density gradients in these input files are modified to produce new input files. Results from these simulations show a weak ITG instability in the barrier region at the time of onset, above marginal stability; the normalized critical temperature gradient is 80% of the experimental temperature gradient. The growth rate increases linearly above the critical value, with the spectrum of ITG modes remaining parabolic up to a multiplicative factor of 2. The effect of varying density gradients is found to be …
Date:
August 23, 2004
Creator:
Baumgaertel, J. A.; Redi, M. H.; Budny, R. V.; McCune, D. C.; Dorland, W. & Fiore, C. L.
Object Type:
Report
System:
The UNT Digital Library
Full System Operations of Mercury; A Diode-Pumped Solid-State Laser
Operation of the Mercury laser with two amplifiers activated has yielded 30 Joules at 1 Hz and 12 Joules at 10 Hz and over 8 x 10{sup 4} shots on the system. Static distortions in the Yb:S-FAP amplifiers were corrected by magneto rheological finishing technique.
Date:
September 23, 2004
Creator:
Bayramian, A. J.; Armstrong, P.; Beach, R. J.; Bibeau, C.; Campbell, R.; Ebbers, C. A. et al.
Object Type:
Article
System:
The UNT Digital Library
Massachusetts Emergency Management and Homeland Security Authorities Summarized
None
Date:
March 23, 2004
Creator:
Bea, Keith
Object Type:
Report
System:
The UNT Digital Library
Kentucky Emergency Management and Homeland Security Authorities Summarized
None
Date:
March 23, 2004
Creator:
Bea, Keith; Richardson, Sula P.; Runyon, L. Cheryl & Warnock, Kae M.
Object Type:
Report
System:
The UNT Digital Library
Minnesota Emergency Management and Homeland Security Authorities Summarized
None
Date:
March 23, 2004
Creator:
Bea, Keith; Richardson, Sula P.; Runyon, L. Cheryl & Warnock, Kae M.
Object Type:
Report
System:
The UNT Digital Library
Missouri Emergency Management and Homeland Security Authorities Summarized
None
Date:
March 23, 2004
Creator:
Bea, Keith; Richardson, Sula P.; Runyon, L. Cheryl & Warnock, Kae M.
Object Type:
Report
System:
The UNT Digital Library
Alabama Emergency Management and Homeland Security Statutory Authorities Summarized
This report is one of a series that profiles the emergency management and homeland security statutory authorities of the 50 states, the District of Columbia, the Commonwealth of the Northern Mariana Islands, the Commonwealth of Puerto Rico, and three territories (American Samoa, Guam, and the U.S. Virgin Islands). Each profile identifies the more significant elements of state statutes, generally as codified. This report focuses on the state of Alabama.
Date:
March 23, 2004
Creator:
Bea, Keith; Runyon, L. Cheryl & Warnock, Kae M.
Object Type:
Report
System:
The UNT Digital Library
Hawaii Emergency Management and Homeland Security Authorities Summarized
This report profiles Hawaii emergency management and Homeland Security authorities.
Date:
March 23, 2004
Creator:
Bea, Keith; Runyon, L. Cheryl & Warnock, Kae M.
Object Type:
Report
System:
The UNT Digital Library
Illinois Emergency Management and Homeland Security Authorities Summarized
The Illinois Emergency Management Agency Act outlines the state and local governments’ roles and responsibilities in emergency management. The statute authorizes disaster victims to receive special assistance from the state. The Governor’s Succession Act and the Emergency Interim Executive Successors Act outline provisions for the continuity of Illinois government operations. Other acts require emergency evacuation plans for people with disabilities and authorizations for certified local employees to take leave to provide assistance. When funds are not sufficient in the state’s disaster relief fund, the governor is authorized to transfer or borrow funds if the General Assembly is not in session, or to request legislative action if the assembly is in session. The statute authorizes municipalities to impose taxes, within limits, to fund disaster services.
Date:
March 23, 2004
Creator:
Bea, Keith; Runyon, L. Cheryl & Warnock, Kae M.
Object Type:
Report
System:
The UNT Digital Library
Kansas Emergency Management and Homeland Security Authorities Summarized
None
Date:
March 23, 2004
Creator:
Bea, Keith; Runyon, L. Cheryl & Warnock, Kae M.
Object Type:
Report
System:
The UNT Digital Library
Michigan Emergency Management and Homeland Security Authorities Summarized
None
Date:
March 23, 2004
Creator:
Bea, Keith; Runyon, L. Cheryl & Warnock, Kae M.
Object Type:
Report
System:
The UNT Digital Library
Montana Emergency Management and Homeland Security Authorities Summarized
None
Date:
March 23, 2004
Creator:
Bea, Keith; Runyon, L. Cheryl & Warnock, Kae M.
Object Type:
Report
System:
The UNT Digital Library
Nevada Emergency Management and Homeland Security Authorities Summarized
None
Date:
March 23, 2004
Creator:
Bea, Keith; Runyon, L. Cheryl & Warnock, Kae M.
Object Type:
Report
System:
The UNT Digital Library
New York Emergency Management and Homeland Security Authorities Summarized
None
Date:
March 23, 2004
Creator:
Bea, Keith; Runyon, L. Cheryl & Warnock, Kae M.
Object Type:
Report
System:
The UNT Digital Library
North Dakota Emergency Management and Homeland Security Statutory Authorities Summarized
This report is one of a series that profiles the emergency management and homeland security statutory authorities of the 50 states, the District of Columbia, the Commonwealth of the Northern Mariana Islands, the Commonwealth of Puerto Rico, and three territories (American Samoa, Guam, and the U.S. Virgin Islands). Each profile identifies the more significant elements of state statutes, generally as codified. This report focuses on the state of North Dakota.
Date:
March 23, 2004
Creator:
Bea, Keith; Runyon, L. Cheryl & Warnock, Kae M.
Object Type:
Report
System:
The UNT Digital Library
Oklahoma Emergency Management and Homeland Security Authorities Summarized
None
Date:
March 23, 2004
Creator:
Bea, Keith; Runyon, L. Cheryl & Warnock, Kae M.
Object Type:
Report
System:
The UNT Digital Library
Oregon Emergency Management and Homeland Security Statutory Authorities Summarized
This report is one of a series that profiles the emergency management and homeland security statutory authorities of the 50 states, the District of Columbia, the Commonwealth of the Northern Mariana Islands, the Commonwealth of Puerto Rico, and three territories (American Samoa, Guam, and the U.S. Virgin Islands). Each profile identifies the more significant elements of state statutes, generally as codified. This report focuses on the state of Oregon.
Date:
March 23, 2004
Creator:
Bea, Keith; Runyon, L. Cheryl & Warnock, Kae M.
Object Type:
Report
System:
The UNT Digital Library