Low-density parity-check codes
A low-density parity-check code is a code specified by a parity-check matrix with the following properties: each column contains a small fixed number <tex xmlns:mml="http://www....
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VI. The phenomena of rupture and flow in solids
In the course of an investigation of the effect of surface scratches on the mechanical strength of solids, some general conclusions were reached which appear to have a direct be...
Posttraumatic Stress Disorder in the National Comorbidity Survey
Posttraumatic stress disorder is more prevalent than previously believed, and is often persistent. Progress in estimating age-at-onset distributions, cohort effects, and the con...
Exact stochastic simulation of coupled chemical reactions
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTExact stochastic simulation of coupled chemical reactionsDaniel T. GillespieCite this: J. Phys. Chem. 1977, 81, 25, 2340–2361Publicat...
Raman Spectrum of Graphite
Raman spectra are reported from single crystals of graphite and other graphite materials. Single crystals of graphite show one single line at 1575 cm−1. For the other materials ...
Digital Natives, Digital Immigrants Part 1
The main purpose of this project is to develop mathematical competences through interactive educational environments of multi-device access in the ninth grade students of the In...
Titanium Dioxide Nanomaterials: Synthesis, Properties, Modifications, and Applications
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTitanium Dioxide Nanomaterials: Synthesis, Properties, Modifications, and ApplicationsXiaobo Chen and Samuel S. MaoView Author Inform...
The Cambridge Structural Database: a quarter of a million crystal structures and rising
The Cambridge Structural Database (CSD) now contains data for more than a quarter of a million small-molecule crystal structures. The information content of the CSD, together wi...
Efficacy and Safety of the mRNA-1273 SARS-CoV-2 Vaccine
The mRNA-1273 vaccine showed 94.1% efficacy at preventing Covid-19 illness, including severe disease. Aside from transient local and systemic reactions, no safety concerns were ...
The 2021 WHO Classification of Tumors of the Central Nervous System: a summary
Abstract The fifth edition of the WHO Classification of Tumors of the Central Nervous System (CNS), published in 2021, is the sixth version of the international standard for the...
Optical Properties and Electronic Structure of Amorphous Germanium
Abstract The optical constants of amorphous Ge are determined for the photon energies from 0.08 to 1.6 eV. From 0.08 to 0.5 eV, the absorption is due to k ‐conserving transition...