Results 61 to 70 of about 248,275 (303)
Advanced Science, EarlyView.A semiconductor‐fabricated nanowell biosensor enables rapid, scalable, and highly reproducible detection of SARS‐CoV‐2 antigens from nasal swabs within ∼10 minutes. Clinical validation in 249 retrospective and 243 prospective patient samples demonstrates high sensitivity and specificity, minimal cross‐reactivity, and robust batch‐to‐batch ...
Yoo Min Park +11 more
wiley +1 more source
Determination of Geometrical REVs Based on Volumetric Fracture Intensity and Statistical Tests
Applied Sciences, 2018 This paper presents a method to estimate a representative element volume (REV) of a fractured rock mass based on the volumetric fracture intensity P32 and statistical tests.
Ying Liu +5 more
doaj +1 more source
Alzheimer's Disease Risk Factor APOE4 Exerts Dimorphic Effects on Female Bone
Advanced Science, EarlyView.In aging bone, osteocytes accumulate neurodegenerative risk factor Apolipoprotein E (APOE). A humanized version of the Alzheimer's disease risk allele APOE4 altered the mouse bone transcriptome and proteome, with effects in female bone surpassing the brain, including bone fragility due to suppressed osteocytic maintenance of bone quality, identifying ...
Charles A. Schurman +15 more
wiley +1 more source
BMC NursingBackground Despite their own experience of mental health issues, informal caregivers of individuals with dementia are often overlooked, and there is a limited availability of community services tailored specifically for them.
Shanshan Wang +5 more
doaj +1 more source
Wald Tests of I(1) against I(d) alternatives: some new properties and an extension to processes with trending components. [PDF]
This paper analyses the behaviour of a Wald-type test, i.e., the (E¢ cient) Fractional Dickey-Fuller (EFDF) test of I(1) against I(d); dDeterministic components; Fractional processes; Power; Unit roots;
Dolado, Juan José +2 more
core
Applied Economic Perspectives and Policy, EarlyView.ABSTRACT Rice is the main staple food for more than half of the world's population and the income from rice is an essential source for livelihoods of millions of households. We examine whether direct seed in rice production is an adaptation of rice farmers to rainfall changes and farm labor scarcity.
Manh Hung Do
wiley +1 more source
Generalized inverses and asymptotic properties of Wald tests [PDF]
Economics Letters, 1987 We consider Wald tests based on consistent estimators of g-inverses of the asymptotic covariance matrix ∑ of a statistic that is n^1/2-asymptotically normal distributed under the null hypothesis. Under the null hypothesis and under any sequence of local alternatives in the column space of ∑, these tests are asymptotically equivalent for any choice of g-
openaire +3 more sources
Finite sample inference for GMM estimators in linear panel data models [PDF]
We compare the finite sample performance of a range of tests of linear restrictions for linear panel data models estimated using Generalised Method of Moments (GMM).
Frank Windmeijer, Steve Bond
core
Applied Economic Perspectives and Policy, EarlyView.ABSTRACT We link American Community Survey and SNAP records for 185,000 units with ground‐sourced social food infrastructure data from FindFoodIL (Illinois Extension SNAP‐Ed) to examine SNAP participation determinants among eligible units. Bivariate probit models reveal, beyond SNAP offices, quantity of social infrastructure is associated with ...
Michael Lotspeich‐Yadao +3 more
wiley +1 more source
SignalsBanding the inverse of a covariance matrix has become a popular technique for estimating a covariance matrix from a limited number of samples. It is of interest to provide criteria to determine if a matrix is bandable, as well as to test the bandedness ...
Zhenghan Zhu
doaj +1 more source