Results 11 to 20 of about 1,908,179 (350)

Adiabatic Berry Phase and Hannay Angle for Open Paths [PDF]

, 1998
We obtain the adiabatic Berry phase by defining a generalised gauge potential whose line integral gives the phase holonomy for arbitrary evolutions of parameters. Keeping in mind that for classical integrable systems it is hardly clear how to obtain open-
Aharonov, Anandan, Arun Kumar Pati, Berry, Berry, Berry, Berry, Golin, Gozzi, Hannay, Jain, Jarzynski, Keller, Maamache, Mead, Mukunda, Pancharatnam, Parker, Pati, Pati, Samuel, Simon, Wagh, Wigner, Wu   +24 more
core   +2 more sources

Phase shifting angle interferometer

Metrologia, 2023
Abstract A phase shifting Twymann-Green interferometer for the measurement of plane angle has been developed and characterized using a small-angle generator directly traceable to the definition of the radian. The impact of surface form on the measured angle was explored using a simple deformable mirror.
Eves, B. J., Leroux, I. D., Cen, A. J.
openaire   +1 more source

Sarcopenia in Non-Dialysis Chronic Kidney Disease Patients: Prevalence and Associated Factors

Frontiers in Medicine, 2022
BackgroundSarcopenia is related to morbidity and mortality in non-dialysis Chronic Kidney Disease (ND-CKD) patients; however, the pathophysiology of sarcopenia remains unclear.
Geraldo José de Amorim, Geraldo José de Amorim, Cinthia Katiane Martins Calado, Bruno Carlos Souza de Oliveira, Renata Patricia Oliveira Araujo, Tayrine Ordonio Filgueira, Matheus Santos de Sousa Fernandes, Angela Castoldi, Gisele Vajgel, Lucila Maria Valente, José Luiz de Lima-Filho, Paulo Roberto Cavalcanti Carvalho, Fabricio Oliveira Souto   +12 more
doaj   +1 more source

Bioimpedance Vector References Need to Be Period-Specific for Assessing Body Composition and Cellular Health in Elite Soccer Players: A Brief Report

Journal of Functional Morphology and Kinesiology, 2020
Purpose: Bioimpedance data through bioimpedance vector analysis (BIVA) is used to evaluate cellular function and body fluid content. This study aimed to (i) identify whether BIVA patters differ according to the competitive period and (ii) provide ...
Tindaro Bongiovanni, Gabriele Mascherini, Federico Genovesi, Giulio Pasta, Fedon Marcello Iaia, Athos Trecroci, Marco Ventimiglia, Giampietro Alberti, Francesco Campa   +8 more
doaj   +1 more source

Bioimpedance basics and phase angle fundamentals

Reviews in Endocrine and Metabolic Disorders, 2023
AbstractMeasurement of phase angle using bioimpedance analysis (BIA) has become popular as an index of so-called “cellular health”. What precisely is meant by this term is not always clear but strong relationships have been found between cellular water status (the relative amounts of extra- and intracellular water), cell membrane integrity and cellular
Leigh C. Ward, Steven Brantlov
openaire   +2 more sources

Impact of sarcopenia and phase angle on mortality of the very elderly

Journal of Cachexia, Sarcopenia and Muscle, 2023
Background Sarcopenia is a major component of geriatric syndrome and associated with poor clinical outcomes and mortality. However, diagnosing sarcopenia in the very elderly is difficult, and data on its epidemiology and devastating effects in this group
Young Eun Kwon, Jung Sun Lee, Jee‐young Kim, Song In Baeg, Hye Min Choi, Hong‐Bae Kim, Joon Young Yang, Dong‐Jin Oh   +7 more
doaj   +1 more source

Linear canonical transformations and quantum phase:a unified canonical and algebraic approach [PDF]

, 1999
The algebra of generalized linear quantum canonical transformations is examined in the prespective of Schwinger's unitary-canonical basis. Formulation of the quantum phase problem within the theory of quantum canonical transformations and in particular ...
Arnold V, Arnold V, Balian R, Born M, Boyer C P, Brown E, Candan C, Dirac P A M, Dirac P A M, Ellinas D, Gilmore R, Hakioglu T, Heitler W, Kogan I, Mandel L, Moshinsky M, Moshinsky M, Moyal J, Namias V, Pegg D T, Rocca F, Schwinger J, Schwinger J, Shen X, Soo-Chang Pei, Susskind L, T Hakioglu, Tanas R, Vogel W, Vourdas A, Wang S J, Weyl H, Wolf K B, Zak J   +33 more
core   +2 more sources

Active limited-angle tomographic phase microscope [PDF]

Journal of Biomedical Optics, 2015
We demonstrate an active, holographic tomography system, working with limited angle of projections, realized by optical-only, diffraction-based beam steering. The system created for this purpose is a Mach–Zehnder interferometer modified to serve as a digital holographic microscope with a high numerical aperture illumination module and a spatial light ...
Arkadiusz, Kus, Wojciech, Krauze, Malgorzata, Kujawinska   +2 more
openaire   +2 more sources

Phase diagram of $q$-deformed Yang-Mills theory on $S^2$ at non-zero $\theta$-angle [PDF]

, 2018
We study the phase diagram of $q$-deformed Yang-Mills theory on $S^2$ at non-zero $\theta$-angle using the exact partition function at finite $N$. By evaluating the exact partition function numerically, we find evidence for the existence of a series of ...
Okuyama, Kazumi
core   +2 more sources

Phase Angle Cut-Off Points and Their Association With Sarcopenia and Frailty in Adults of 50–64 Years Old and Older Adults in Mexico City

Frontiers in Medicine, 2021
Background: In recent studies, the usefulness of the phase angle (PA) to assess geriatric conditions such as sarcopenia and frailty has been evaluated.
Oscar Rosas-Carrasco, Oscar Rosas-Carrasco, Roxana E. Ruiz-Valenzuela, Miriam T. López-Teros   +3 more
doaj   +1 more source