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Materias / palabras clave: semiconductor physics, hetero- and low-dimensional structures, physics of microelectronic devices, linear and nonlinear solid-state optics, optoelectronics and optoelectronic devices, sensors; Science: Physics

Semiconductor nanocrystals were prepared for use as fluorescent probes in biological staining and diagnostics. Compared with conventional fluorophores, the nanocrystals have a narrow, tunable, symmetric emission spectrum...

We present ab initio quantum-mechanical molecular-dynamics simulations of the liquid-metal--amorphous-semiconductor transition in Ge. Our simulations are based on (a) finite-temperature density-functional theory of the o...

It has been recognized for some time that the spontaneous emission by atoms is not necessarily a fixed and immutable property of the coupling between matter and space, but that it can be controlled by modification of the...

The electronic properties of ultrathin crystals of molybdenum disulfide consisting of N=1,2,…,6 S-Mo-S monolayers have been investigated by optical spectroscopy. Through characterization by absorption, photoluminescenc...

Materias / palabras clave: Ab initio; Hamiltonian (control theory); Basis set; Plane wave; Statistical physics; Ab initio quantum chemistry methods; Density functional theory; Electronic structure; Phonon; Degrees of freedom (physics and chemistry...

Many potential applications have been proposed for carbon nanotubes, including conductive and high-strength composites; energy storage and energy conversion devices; sensors; field emission displays and radiation sources...

Novel physical phenomena can emerge in low-dimensional nanomaterials. Bulk MoS(2), a prototypical metal dichalcogenide, is an indirect bandgap semiconductor with negligible photoluminescence. When the MoS(2) crystal is t...

This review describes a new paradigm of electronics based on the spin degree of freedom of the electron. Either adding the spin degree of freedom to conventional charge-based electronic devices or using the spin alone ha...

This paper presents evidence from three samples, two of college students and one of participants in a community smoking-cessation program, for the reliability and validity of a 14-item instrument, the Perceived Stress Sc...

Materias / palabras clave: Intraclass correlation; Reliability (semiconductor); Guideline; Inter-rater reliability; Intra-rater reliability; Medicine; Clinical Practice; Reading (process); Test (biology); Computer science; Medical physics; Data mi...

The estimation of the probability that a drug caused an adverse clinical event is usually based on clinical judgment. Lack of a method for establishing causality generates large between-raters and within-raters variabili...

The kappa statistic is frequently used to test interrater reliability. The importance of rater reliability lies in the fact that it represents the extent to which the data collected in the study are correct representatio...

This paper presents a general statistical methodology for the analysis of multivariate categorical data arising from observer reliability studies. The procedure essentially involves the construction of functions of the o...

Abstract A scale designed to assess various aspects of the burnout syndrome was administered to a wide range of human services professionals. Three subscales emerged from the data analysis: emotional exhaustion, deperson...

Materias / palabras clave: Computer science; Segmentation; Tracing; Artificial intelligence; Context (archaeology); Reliability (semiconductor); Set (abstract data type); Image segmentation; Machine learning; Physics; Power (physics); Operating sy...

We present an efficient scheme for calculating the Kohn-Sham ground state of metallic systems using pseudopotentials and a plane-wave basis set. In the first part the application of Pulay's DIIS method (direct inversion ...

Spintronics, or spin electronics, involves the study of active control and manipulation of spin degrees of freedom in solid-state systems. This article reviews the current status of this subject, including both recent ad...

Topological insulators are new states of quantum matter which cannot be adiabatically connected to conventional insulators and semiconductors. They are characterized by a full insulating gap in the bulk and gapless edge ...

Materias / palabras clave: nanomaterials, polymers, semiconductors, superconductors, metamaterials, materials science; Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of ma...

Materias / palabras clave: radiophysics, radio waves, electrodynamic structures, laser radiation, semiconductor devices, radiophysical methods of diagnosis; Science: Physics

Materias / palabras clave: electronics, electrical engineering, bioengineering, microelectronics, semiconductors; Science: Physics; Technology