Results 51 to 60 of about 2,946,603 (185)

Near-bandgap wavelength-dependent studies of long-lived traveling coherent longitudinal acoustic phonon oscillations in GaSb/GaAs systems

, 2007
We report first studies of long-lived oscillations in optical pump-probe measurements on GaSb-GaAs heterostructures. The oscillations arise from a photogenerated coherent longitudinal acoustic phonon wave, which travels from the top surface of GaSb ...
A. Wood, I. Perakis, J. K. Furdyna, J. K. Miller, J. Qi, N. Tolk, T. V. Shahbazyan, X. Liu, Y. Xu, Y.-J. Cho   +9 more
core   +1 more source

A generalized linear mixed model for longitudinal binary data with a marginal logit link function [PDF]

, 2011
Longitudinal studies of a binary outcome are common in the health, social, and behavioral sciences. In general, a feature of random effects logistic regression models for longitudinal binary data is that the marginal functional form, when integrated over
Fitzmaurice, Garrett M., Ghosh, Souparno, Ibrahim, Joseph G., Lipsitz, Stuart, Mallick, Bani K., Parzen, Michael, Sinha, Debajyoti   +6 more
core   +3 more sources

Structure and correlates of cognitive aging in a narrow age cohort [PDF]

, 2014
Aging-related changes occur for multiple domains of cognitive functioning. An accumulating body of research indicates that, rather than representing statistically independent phenomena, aging-related cognitive changes are moderately to strongly ...
Briley, Daniel A, Deary, Ian J, Starr, John M, Tucker-Drob, Elliot M   +3 more
core   +1 more source

Families as catalysts for peer adherence support in enhancing hope for people living with HIV/AIDS in South Africa

Journal of the International AIDS Society, 2014
Introduction Hope is an essential dimension of successful coping in the context of illnesses such as HIV/AIDS, because positive expectations for the future alleviate emotional distress, enhance quality of life and have been linked to the capacity for ...
Caroline Masquillier, Edwin Wouters, Dimitri Mortelmans, Frederik le Roux Booysen   +3 more
doaj   +1 more source

Variability and agreement of frailty measures and risk of falls, hospital admissions and mortality in TILDA

Scientific Reports, 2022
Little is known about the within-person variability of different frailty instruments, their agreement over time, and whether use of repeat assessments could improve the strength of associations with adverse health outcomes.
Dani J. Kim, M. Sofia Massa, Robert Clarke, Siobhan Scarlett, Aisling M. O’Halloran, Rose Anne Kenny, Derrick Bennett   +6 more
doaj   +1 more source

Supersymmetric effects in top quark decay into polarized W-boson

, 2003
We investigate the one-loop supersymmetric QCD (SUSY-QCD) and electroweak (SUSY-EW) corrections to the top quark decay into a b-quark and a longitudinal or transverse W-boson.
A. Axelrod, A. Brandenburg, A. Dabelstein, A. Dabelstein, A. Datta, A. Denner, A.B. Lahanas, B. Grzadkowski, B.A. Kniehl, C. Balazs, C.A. Nelson, C.A. Nelson, C.A. Nelson, C.A. Nelson, C.A. Nelson, C.S. Li, C.S. Li, C.S. Li, C.S. Li, C.S. Li, C.T. Hill, C.T. Hill, D. Garcia, D. Garcia, D. Groom, E. Boos, E.L. Berger, F. del Aguila, F. del Aguila, Fei Wang, G. Burdman, G. Eilam, G.C. Cho, H.-J. He, H.E. Haber, H.N Brown, H.P. Nilles, J. Cao, J. Cao, J. Cao, J. Fleischer, J. Fleischer, J.A. Grifols, J.F. Gunion, J.J. Cao, J.L. Lopez, J.M. Yang, Jin Min Yang, Junjie Cao, K. Cheung, K. Hikasa, K. Hikasa, K. Whisnant, K.J. Abraham, K.J. Abraham, M. Bohm, M. Carena, M. Fischer, M. Fischer, M. Fischer, M. Fischer, M. Hosch, P. Chiappetta, P.H. Chankowski, R. Barate, R. Hempfling, R.J. Oakes, Robert J. Oakes, S. Heinemeyer, S. Mrenna, S. Willenbrock, T. Affolder, T. Bhattacharya, T. Hahn, T. Hahn, T. Han, W. Hollik, X.L. Wang, Y. Bigi   +78 more
core   +1 more source

Searching for a mitochondrial root to the decline in muscle function with ageing

Journal of Cachexia, Sarcopenia and Muscle, 2018
Sarcopenia, the age‐related loss of muscle mass and strength, is linked to a range of adverse outcomes, such as impaired physical performance, cognitive function, and mortality. Preventing sarcopenia may reduce the burden of functional decline with aging
Marta Gonzalez‐Freire, Fatemeh Adelnia, Ruin Moaddel, Luigi Ferrucci   +3 more
doaj   +1 more source

Predictors of mental health help-seeking among Polish people living in the United Kingdom

BMC Health Services Research, 2018
Background Migration has been shown to be associated with negative mental health outcomes. Moreover, migrants tend to underutilise mental health services.
Dawid Gondek, James B. Kirkbride
doaj   +1 more source

Adolescents’ physical activity: cross-national comparisons of levels, distributions and disparities across 52 countries

International Journal of Behavioral Nutrition and Physical Activity, 2019
Background Despite global concerns regarding physical inactivity, limited cross-national evidence exists to compare adolescents’ physical activity participation.
David Bann, Shaun Scholes, Meg Fluharty, Nikki Shure   +3 more
doaj   +1 more source

Compensating for Missing Data from Longitudinal Studies Using WinBUGS [PDF]

Missing data is a common problem in survey based research. There are many packages that compensate for missing data but few can easily compensate for missing longitudinal data.
Adrian G. Barnett, Annette J. Dobson, Gita Mishra, Gretchen Carrigan   +3 more
core   +1 more source