Zobrazeno 1 - 10
of 130
pro vyhledávání: '"Weissman, M B"'
Autor:
Weissman, M. B.
Publikováno v:
J Royal Statistical Society Society, Series A Stat Soc YR 2024
A comparison of the distances to the Huanan Seafood Market of early Covid cases with known links to the market versus cases without known links shows results apparently incompatible with a location model lacking proximity ascertainment bias. The sign
Externí odkaz:
http://arxiv.org/abs/2401.08680
Autor:
Weissman, M. B., Robins, J. M.
A paper evaluating the effects of lessons intended to encourage high school students to continue physics studies made some important errors. One was to underestimate the width of confidence intervals by failing to use standard cluster randomization a
Externí odkaz:
http://arxiv.org/abs/2305.14156
Autor:
Weissman, M. B.
Finding good educational policies requires sound estimates of their potential effects. Methods for making such estimates, i.e. finding causal estimands, have made great progress in the last few decades. Nevertheless, serious errors in causal reasonin
Externí odkaz:
http://arxiv.org/abs/2110.04266
Autor:
Weissman, M. B.
Publikováno v:
Phys. Rev. Phys. Educ. Res. 17, 020118 (2021)
Sound educational policy recommendations require valid estimates of causal effects, but observational studies in physics education research sometimes have loosely specified causal hypotheses. The connections between the observational data and the exp
Externí odkaz:
http://arxiv.org/abs/2101.05647
Autor:
Fields, Gregory A., Cieszynski, Samuel F., Zhao, Bo, Tadesse, Kidan A., Colla, Eugene V., Weissman, M. B.
Publikováno v:
Journal of Applied Physics 125, 194102 (2019)
The anomalously large dielectric aging in ferroelectric partially deuterated potassium dihydrogen phosphate (DKDP) is found to have multiple distinct mechanisms. Two components cause decreases in dielectric response over a limited range of fields aro
Externí odkaz:
http://arxiv.org/abs/1812.00451
Non-equilibrium Strain Relaxation Noise in the Relaxor Ferroelectric (PbMg1/3Nb2/3O3)100-x( PbTiO3)x
Publikováno v:
Journal of Applied Physics 124, 234102 (2018)
Large low-frequency noise is found in some perovskite relaxor ferreoelectrics when they are polarized, regardless of whether the polarization is accompanied by an applied electric field. The noise appears both in the ferroelectric and relaxor states,
Externí odkaz:
http://arxiv.org/abs/1807.06183
Publikováno v:
Phys. Rev. Materials 1, 044403 (2017)
Anomalously large dielectric aging is found in the high-susceptibility plateau ferroelectric regime of ~95% deuterated potassium dihydrogen phosphate (DKDP). Much less aging is found in non-deuterated KDP. Optical images of the DKDP domain structure
Externí odkaz:
http://arxiv.org/abs/1706.05559
Publikováno v:
Phys. Rev. B 95, 144203 (2017)
Barkhausen current noise is used to probe the slow field-driven conversion of the glassy relaxor ferroelectric state to an ordered ferroelectric (FE) state. The frequent presence of distinct micron-scale Barkhausen events well before the polarization
Externí odkaz:
http://arxiv.org/abs/1701.07740
Autor:
Caplan, D. S., Orlyanchik, V., Weissman, M. B., Van Harlingen, D. J., Fradkin, E. H., Hinton, M. J., Lemberger, T. R.
Publikováno v:
Phys. Rev. Lett. 104, 177001 (2010)
An unusual noise component is found near and below about 250 K in the normal state of underdoped YBCO and Ca-YBCO films. This noise regime, unlike the more typical noise above 250 K, has features expected for a symmetry-breaking collective electronic
Externí odkaz:
http://arxiv.org/abs/1004.5554
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