Results 21 to 30 of about 7,132,675 (320)
Nuclear kinetic density from ab initio theory [PDF]
Phys. Rev. C 99, 024305 (2019), 2018 Background: The nuclear kinetic density is one of many fundamental quantities in density functional theory (DFT) dependent on the nonlocal nuclear density. Often, approximations may be made when computing the density that may result in spurious contributions in other DFT quantities.
arxiv +1 more source
The Lancet Planetary Health, 2017 Background: Obesity is a major health issue and an important public health target for urban design. However, the evidence for identifying the optimum residential density in relation to obesity has been far from compelling.
Dr Chinmoy Sarkar, PhD +2 more
doaj +1 more source
Exploration, normalization, and summaries of high density oligonucleotide array probe level data.
Biostatistics, 2003 In this paper we report exploratory analyses of high-density oligonucleotide array data from the Affymetrix GeneChip system with the objective of improving upon currently used measures of gene expression. Our analyses make use of three data sets: a small
R. Irizarry +6 more
semanticscholar +1 more source
Developing the NIS solid density hydrostatic weighing system up to 20 kg
International Journal of Metrology and Quality Engineering, 2020 This paper presents a developed design and construction to improve the performance and increasing the density measuring capability of the previous Hydrostatic Weighing Apparatus (HWA-NIS) at the National Institute of Standards (NIS) up to 20 kg.
Hamdy Mohamed +3 more
doaj +1 more source
Journal of Asian Ceramic Societies, 2021 Several studies have been conducted on energy harvesting, which involves conversion of unused environmental energy into a power source. More than half of the energy consumed is wasted as heat.
Hironari Sugiyama +14 more
doaj +1 more source
Low-Density Parity-Check Codes
, 2004 Low-density parity-check (LDPC) error correcting codes were introduced in 1963 by Robert Gallager in his Ph.D. thesis. The basic motivation came from the observation that random linear codes, cf.
Christian Schlegel, Lance C. Perez
semanticscholar +1 more source
Restoring the density-gradient expansion for exchange in solids and surfaces. [PDF]
Physical Review Letters, 2007 Popular modern generalized gradient approximations are biased toward the description of free-atom energies. Restoration of the first-principles gradient expansion for exchange over a wide range of density gradients eliminates this bias.
J. Perdew +7 more
semanticscholar +1 more source
Polytechnic, 2021 Formalin is widely used chemical substance in industry and medicine (as tissue fixative and disinfectant). It contains reactive molecules which have been known for its cytotoxic effects.
Trefa F. Ismail +3 more
doaj +1 more source
On Estimation of a Probability Density Function and Mode
, 1962 : Given a sequence of independent identically distributed random variables with a common probability density function, the problem of the estimation of a probability density function and of determining the mode of a probability function are discussed ...
E. Parzen
semanticscholar +1 more source
Self-interaction correction to density-functional approximations for many-electron systems
, 1981 exchange and correlation, are not. We present two related methods for the self-interaction correction (SIC) of any density functional for the energy; correction of the self-consistent one-electron potenial follows naturally from the variational principle.
J. Perdew, A. Zunger
semanticscholar +1 more source