Results 21 to 30 of about 13,643,061 (311)

Cathode porosity is a missing key parameter to optimize lithium-sulfur battery energy density

open access: yesNature Communications, 2019
For high-energy lithium-sulfur batteries, a dense electrode with low porosity is desired to minimize electrolyte intake, parasitic weight, and cost. Here the authors show the impact of porosity on the performance of lithium-sulfur batteries and reveal ...
Ning Kang   +6 more
doaj   +1 more source

Notes on D‑optimal Spring Balance Weighing Designs

open access: yesActa Universitatis Lodziensis. Folia Oeconomica, 2018
Spring balance weighing design is a model of an experiment in which the result can be presented as a linear combination of unknown measurements of objects with factors of this combination equalling zero or one. In this paper, we assume that the variances
Bronisław Ceranka, Małgorzata Graczyk
doaj   +1 more source

Rancangan D-Optimal Model Gompertz dengan Maple

open access: yesMedia Statistika, 2017
Gompertz model is used in many areas including biological growth studies, animal and husbandry, chemistry, and agricultural. Locally D-optimal designs for Gompertz models with three parameters is investigated.
Tatik Widiharih, Budi Warsito
doaj   +1 more source

Determination of Optimal Vitamin D Dosage in Children with Cholestasis

open access: yesBMC Pediatrics, 2023
Background Vitamin D deficiency in patients with cholestasis is due to impaired intestinal vitamin D absorption, which results from decreased intestinal bile acid concentration.
Sirada Chongthavornvasana   +3 more
doaj   +1 more source

D-Optimal Design for Network A/B Testing [PDF]

open access: yesJournal of Statistical Theory and Practice, 2019
A/B testing refers to the statistical procedure of conducting an experiment to compare two treatments, A and B, applied to different testing subjects. It is widely used by technology companies such as Facebook, LinkedIn, and Netflix, to compare different algorithms, web-designs, and other online products and services.
Victoria Pokhilko   +3 more
openaire   +2 more sources

RANCANGAN D-OPTIMAL UNTUK MODEL EKSPONENSIAL GENERAL

open access: yesMedia Statistika, 2014
Exponential model is widely used in biology, chemistry, pharmacokinetics and microbiology. D-optimal criteria is criteria with the purpuse to minimize the variance of  the estimator of parameters in the model.
Tatik Widiharih   +2 more
doaj   +1 more source

D-Optimal Design for a Causal Structure for Completely Randomized and Random Blocked Experiments

open access: yesJournal of Probability and Statistics, 2022
Most experimental design literature on causal inference focuses on establishing a causal relationship between variables, but there is no literature on how to identify a design that results in the optimal parameter estimates for a structural equation ...
Zaher Kmail, Kent Eskridge
doaj   +1 more source

D-Optimal Designs with Hadamard Matrix

open access: yesJournal of Mathematical Analysis and Applications, 1993
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Chow, K.L., Lii, K.S.
openaire   +1 more source

On the number of D-optimal designs

open access: yesJournal of Combinatorial Theory, Series A, 1994
The main result of the paper is the theorem: For \(n=18\), there are precisely three essentially different matrices with elements \(\pm 1\) having the maximum determinant. Only one of these is of the circulant type, but all are of the skew type. This means that there are three \(D\)-optimal designs for \(n=18\).
openaire   +2 more sources

Vitamin D: A comprehensive review [PDF]

open access: yesSrpski Arhiv za Celokupno Lekarstvo
Vitamin D (calciferol), i.e. its active metabolite calcitriol [1,25(OH)2D], apart from essential participation in calcium and phosphorus homeostasis, is an important factor in the regulation of cell proliferation, differentiation and apoptosis ...
Radlović Nedeljko   +6 more
doaj   +1 more source

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