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Search Results: 1 - 10 of 435720 matches for " J. G. Kawall "
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Finite Element Analysis of Sound Transmission Loss in One-Dimensional Solids  [PDF]
S. D. Yu, J. G. Kawall
Open Journal of Acoustics (OJA) , 2013, DOI: 10.4236/oja.2013.34017

A higher-order acoustic-displacement based finite element procedure is presented in this paper to investigate one-dimensional sound propagation through a solid and the associated transmission loss. The acoustic system consists of columns of standard air and a solid, with the upstream column of air subjected to a sinusoidal sound source. The longitudinal wave propagation in each medium is modeled using three-node finite elements. At the interfaces between the air and the solid medium, the continuity in acoustic displacements and the force equilibrium conditions are enforced. The Lagrange multipliers method is utilized to assemble the global equations of motion for the acoustic system. Numerical results obtained for various test cases using the procedure described in the paper are in excellent agreement with the analytical solutions and other independent solutions available in the literature.

A Test of CPT and Lorentz Invariance from Muonium Spectroscopy
D. Kawall,V. W. Hughes,M. Grosse Perdekamp,W. Liu,K. Jungmann,G. zu Putlitz
Physics , 2002,
Abstract: Upon a suggestion of Kostelecky et al., we have performed a test of CPT and Lorentz invariance from the microwave spectroscopy of muonium. New terms in their standard model extension violating CPT and Lorentz symmetry would appear as anti-correlated frequency shifts, oscillating at the earth's sidereal frequency, in the two ground state hyperfine transitions involving muon spin flip, $\nu_{12}$ and $\nu_{34}$, which were measured in a strong magnetic field of 1.7 T. No such time dependence was observed in $\nu_{12}$ or $\nu_{34}$ at the level of 20 Hz, limiting the size of some CPT and Lorentz violating parameters with Planck scale sensitivity, and representing almost an order of magnitude improvement over previous limits for the muon.
Test of CPT and Lorentz invariance from muonium spectroscopy
V. W. Hughes,M. Grosse Perdekamp,D. Kawall,W. Liu,K. Jungmann,G. zu Putlitz
Physics , 2001, DOI: 10.1103/PhysRevLett.87.111804
Abstract: Following a suggestion of Kostelecky et al. we have evaluated a test of CPT and Lorentz invariance from the microwave spectroscopy of muonium. Hamiltonian terms beyond the standard model violating CPT and Lorentz invariance would contribute frequency shifts $\delta\nu_{12}$ and $\delta\nu_{34}$ to $\nu_{12}$ and $\nu_{34}$, the two transitions involving muon spin flip, which were precisely measured in ground state muonium in a strong magnetic field of 1.7 T. The shifts would be indicated by anti-correlated oscillations in $\nu_{12}$ and $\nu_{34}$ at the earth's sidereal frequency. No time dependence was found in $\nu_{12}$ or $\nu_{34}$ at the level of 20 Hz, limiting the size of some CPT and Lorentz violating parameters at the level of $2\times10^{-23}$ GeV, representing Planck scale sensitivity and an order of magnitude improvement in sensitivity over previous limits for the muon.
Corpo e história do povo yurok
Ferreira, Mariana Kawall Leal;
Revista de Antropologia , 1998, DOI: 10.1590/S0034-77011998000200003
Abstract: yurok perceptions of the body as the inscribed surface of social and environmental change are explored in this paper. to the violence and brutality of spaniards, fur traders, gold miners, american soldiers, and indian policies of the us government since the eighteenth century, yurok women attribute the high incidence of degenerative diseases, drug abuse and criminality in northern california. the piece contemplates the lives of eight generations of sixteen yurok extended families, mapping intergenerational shifts in yurok social relations and political practices. it considers the mutation of knowledge in the constitution of the natural and social sciences and the effects of this knowledge when implemented in yurok country. here, critical medical anthropology values the correlation between body and history in the works of foucault (1977), sahlins (1985, 1995), and scheper-hughes & lock (1987). this historico-critical investigation shows how certain events mark their power and engrave memories on individuals? bodies. it is within a hybrid set of cross-cultural and interdisciplinary practices that a more fruitful understanding of yurok body imagery can be fashioned.
A New Method For A Sensitive Deuteron EDM Experiment
Y. K. Semertzidis,M. Aoki,M. Auzinsh,V. Balakin,A. Bazhan,G. W. Bennett,R. M. Carey,P. Cushman,P. T. Debevec,A. Dudnikov,F. J. M. Farley,D. W. Hertzog,M. Iwasaki,K. Jungmann,D. Kawall,B. Khazin,I. B. Khriplovich,B. Kirk,Y. Kuno,D. M. Lazarus,L. B. Leipuner,V. Logashenko,K. R. Lynch,W. J. Marciano,R. McNabb,W. Meng,J. P. Miller,W. M. Morse,C. J. G. Onderwater,Y. F. Orlov,C. S. Ozben,R. Prig,S. Rescia,B. L. Roberts,N. Shafer-Ray,A. Silenko,E. J. Stephenson,K. Yoshimura
Physics , 2003, DOI: 10.1063/1.1664226
Abstract: In this paper a new method is presented for particles in storage rings which could reach a statistical sensitivity of 10**(-27) e cm for the deuteron EDM. This implies an improvement of two orders of magnitude over the present best limits on the T-odd nuclear forces ksi parameter.
An Improved Limit on the Muon Electric Dipole Moment
G. W. Bennett,B. Bousquet,H. N. Brown,G. Bunce,R. M. Carey,P. Cushman,G. T. Danby,P. T. Debevec,M. Deile,H. Deng,W. Deninger,S. K. Dhawan,V. P. Druzhinin,L. Duong,E. Efstathiadis,F. J. M. Farley,G. V. Fedotovich,S. Giron,F. E. Gray,D. Grigoriev,M. Grosse-Perdekamp,A. Grossmann,M. F. Hare,D. W. Hertzog,X. Huang,V. W. Hughes,M. Iwasaki,K. Jungmann,D. Kawall,M. Kawamura,B. I. Khazin,J. Kindem,F. Krienen,I. Kronkvist,A. Lam,R. Larsen,Y. Y. Lee,I. Logashenko,R. McNabb,W. Meng,J. Mi,J. P. Miller,Y. Mizumachi,W. M. Morse,D. Nikas,C. J. G. Onderwater,Y. Orlov,C. S. Ozben,J. M. Paley,Q. Peng,C. C. Polly,J. Pretz,R. Prigl,G. zu Putlitz,T. Qian,S. I. Redin,O. Rind,B. L. Roberts,N. Ryskulov,S. Sedykh,Y. K. Semertzidis,P. Shagin,Yu. M. Shatunov,E. P. Sichtermann,E. Solodov,M. Sossong,A. Steinmetz,L. R. Sulak,C. Timmermans,A. Trofimov,D. Urner,P. von Walter,D. Warburton,D. Winn,A. Yamamoto,D. Zimmerman
Physics , 2008, DOI: 10.1103/PhysRevD.80.052008
Abstract: Three independent searches for an electric dipole moment (EDM) of the positive and negative muons have been performed, using spin precession data from the muon g-2 storage ring at Brookhaven National Laboratory. Details on the experimental apparatus and the three analyses are presented. Since the individual results on the positive and negative muon, as well as the combined result, d=-0.1(0.9)E-19 e-cm, are all consistent with zero, we set a new muon EDM limit, |d| < 1.9E-19 e-cm (95% C.L.). This represents a factor of 5 improvement over the previous best limit on the muon EDM.
A Storage Ring Experiment to Detect a Proton Electric Dipole Moment
V. Anastassopoulos,S. Andrianov,R. Baartman,M. Bai,S. Baessler,J. Benante,M. Berz,M. Blaskiewicz,T. Bowcock,K. Brown,B. Casey,M. Conte,J. Crnkovic,G. Fanourakis,A. Fedotov,P. Fierlinger,W. Fischer,M. O. Gaisser,Y. Giomataris,M. Grosse-Perdekamp,G. Guidoboni,S. Haciomeroglu,G. Hoffstaetter,H. Huang,M. Incagli,A. Ivanov,D. Kawall,B. Khazin,Y. I. Kim,B. King,I. A. Koop,R. Larsen,D. M. Lazarus,V. Lebedev,M. J. Lee,S. Lee,Y. H. Lee,A. Lehrach,P. Lenisa,P. Levi Sandri,A. U. Luccio,A. Lyapin,W. MacKay,R. Maier,K. Makino,N. Malitsky,W. J. Marciano,W. Meng,F. Meot,E. M. Metodiev,L. Miceli,D. Moricciani,W. M. Morse,S. Nagaitsev,S. K. Nayak,Y. F. Orlov,C. S. Ozben,S. T. Park,A. Pesce,P. Pile,V. Polychronakos,B. Podobedov,J. Pretz,V. Ptitsyn,E. Ramberg,D. Raparia,F. Rathmann,S. Rescia,T. Roser,H. Kamal Sayed,Y. K. Semertzidis,Y. Senichev,A. Sidorin,A. Silenko,N. Simos,A. Stahl,E. J. Stephenson,H. Stroeher,M. J. Syphers,J. Talman,R. M. Talman,V. Tishchenko,C. Touramanis,N. Tsoupas,G. Venanzoni,K. Vetter,S. Vlassis,E. Won,G. Zavattini,A. Zelenski,K. Zioutas
Physics , 2015,
Abstract: A new experiment is described to detect a permanent electric dipole moment of the proton with a sensitivity of $10^{-29}e\cdot$cm by using polarized "magic" momentum $0.7$~GeV/c protons in an all-electric storage ring. Systematic errors relevant to the experiment are discussed and techniques to address them are presented. The measurement is sensitive to new physics beyond the Standard Model at the scale of 3000~TeV.
Mu2e Conceptual Design Report
The Mu2e Project,Collaboration,:,R. J. Abrams,D. Alezander,G. Ambrosio,N. Andreev,C. M. Ankenbrandt,D. M. Asner,D. Arnold,A. Artikov,E. Barnes,L. Bartoszek,R. H. Bernstein,K. Biery,V. Biliyar,R. Bonicalzi,R. Bossert,M. Bowden,J. Brandt,D. N. Brown,J. Budagov,M. Buehler,A. Burov,R. Carcagno,R. M. Carey,R. Carosi,M. Cascella,D. Cauz,F. Cervelli,A. Chandra,J. K. Chang,C. Cheng,P. Ciambrone,R. N. Coleman,M. Cooper,M. C. Corcoran,M. Cordelli,Y. Davydov,A. L. de Gouvea,L. De Lorenzis,P. T. Debevec,F. DeJongh,C. Densham,G. Deuerling,J. Dey,S. Di Falco,S. Dixon,R. Djilkibaev,B. Drendel,E. C. Dukes,A. Dychkant,B. Echenard,R. Ehrlich,N. Evans,D. Evbota,I. Fang,J. E. Fast,S. Feher,M. Fischler,M. Frank,E. Frlez,S. S. Fung,G. Gallo,G. Galucci,A. Gaponenko,K. Genser,S. Giovannella,V. Glagolev,D. Glenzinski,D. Gnani,S. Goadhouse,G. D. Gollin,C. Grace,F. Grancagnolo,C. Group,J. Hanson,S. Hanson,F. Happacher,E. Heckmaier,D. Hedin,D. W. Hertzog,R. Hirosky,D. G. Hitlin,E. Ho,X. Huang,E. Huedem,P. Q. Hung,E. V. Hungerford,T. Ito,W. Jaskierny,R. Jedziniak,R. P. Johnson,C. Johnstone,J. A. Johnstone,S. A. Kahn,P. Kammel,T. I. Kang,V. S. Kashikhin,V. V. Kashikhin,P. Kasper,D. M. Kawall,V. Khalatian,M. Kim,A. Klebaner,D. Kocen,Y. Kolomensky,I. Kourbanis,J. Kowalkowski,J. Kozminski,K. Krempetz,K. S. Kumar,R. K. Kutschke,R. Kwarciany,T. Lackowski,M. Lamm,M. Larwill,K. Lau,M. J. Lee,A. L'Erario,T. Leveling,G. Lim,C. Lindenmeyer,V. Logashenko,T. Lontadze,M. Lopes,A. Luca,K. R. Lynch,T. Ma,A. Maffezzoli
Physics , 2012,
Abstract: Mu2e at Fermilab will search for charged lepton flavor violation via the coherent conversion process mu- N --> e- N with a sensitivity approximately four orders of magnitude better than the current world's best limits for this process. The experiment's sensitivity offers discovery potential over a wide array of new physics models and probes mass scales well beyond the reach of the LHC. We describe herein the conceptual design of the proposed Mu2e experiment. This document was created in partial fulfillment of the requirements necessary to obtain DOE CD-1 approval, which was granted July 11, 2012.
Proof of principle for a high sensitivity search for the electric dipole moment of the electron using the metastable a(1)[^3Σ^+] state of PbO
D. Kawall,F. Bay,S. Bickman,Y. Jiang,D. DeMille
Physics , 2003, DOI: 10.1103/PhysRevLett.92.133007
Abstract: The metastable a(1)[^3\Sigma^+] state of PbO has been suggested as a suitable system in which to search for the electric dipole moment (EDM) of the electron. We report here the development of experimental techniques allowing high-sensitivity measurements of Zeeman and Stark effects in this system, similar to those required for an EDM search. We observe Zeeman quantum beats in fluorescence from a vapor cell, with shot-noise limited extraction of the quantum beat frequencies, high counting rates, and long coherence times. We argue that improvement in sensitvity to the electron EDM by at least two orders of magnitude appears possible using these techniques.
High-resolution saturation spectroscopy of singly-ionized iron with a pulsed uv laser
M Ascoli,E E Eyler,D Kawall,David DeMille
Physics , 2007, DOI: 10.1088/0957-0233/19/4/045602
Abstract: We describe the design and realization of a scheme for uv laser spectroscopy of singly-ionized iron (Fe II) with very high resolution. A buffer-gas cooled laser ablation source is used to provide a plasma close to room temperature with a high density of Fe II. We combine this with a scheme for pulsed-laser saturation spectroscopy to yield sub-Doppler resolution. In a demonstration experiment, we have examined an Fe II transition near 260 nm, attaining a linewidth of about 250 MHz. The method is well-suited to measuring transition frequencies and hyperfine structure. It could also be used to measure small isotope shifts in isotope-enriched samples.
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