Results 271 to 280 of about 2,098,248 (309)
Some of the next articles are maybe not open access.
The Formation of Spectral Lines
Annual Review of Astronomy and Astrophysics, 1971This review is addressed to the nonspecialist reader and is intended to provide an intro duction to the physi cs a nd ph enomenology of the radiation field in spectral lines. Results that give the maxi mum insight are stressed and selected , while technical details are suppr essed. Because of restrictions on space and because of the appearance or pr om
D. G. Hummer, G. Rybicki
openaire +1 more source
On Line Monitoring of Acrylamide Formation
2006A system to monitor the formation of acrylamide in model systems and from real food products under controlled conditions of temperature, time and moisture content has been developed. By humidifying the gas that flows through the sample, some control over moisture content can be affected. Results are presented to show the validity and reproducibility of
David J, Cook +2 more
openaire +2 more sources
2007
When we consider the radiation fields of stellar envelopes exposed to the photospheric UV radiation, the basic feature is their anisotropic nature. The degree of anisotropy is expressed by the geometrical dilution factor, W, defined as the ratio of the solid angle, ω, of the photosphere seen from a point of interest, P, relative to the total solid ...
Tomokazu Kogure, Kam-Ching Leung
openaire +1 more source
When we consider the radiation fields of stellar envelopes exposed to the photospheric UV radiation, the basic feature is their anisotropic nature. The degree of anisotropy is expressed by the geometrical dilution factor, W, defined as the ratio of the solid angle, ω, of the photosphere seen from a point of interest, P, relative to the total solid ...
Tomokazu Kogure, Kam-Ching Leung
openaire +1 more source
2012
This chapter gives a review of spectral line formation processes, starting with the main equations valid in thermodynamic equilibrium. The Einstein coefficients and the main spectral line profile functions are discussed.
openaire +1 more source
This chapter gives a review of spectral line formation processes, starting with the main equations valid in thermodynamic equilibrium. The Einstein coefficients and the main spectral line profile functions are discussed.
openaire +1 more source
Transient formation of forbidden lines
Journal of Physics B: Atomic, Molecular and Optical Physics, 1996An explanation of anomalously long time scales in the transient formation of forbidden lines is proposed. The concept is based on a collisionally induced density dependence of the relaxation times of metastable level populations in transient plasma. Generalization leads to an incorporation of diffusion phenomena. We demonstrate this new concept for the
F B Rosmej, O N Rosmej
openaire +1 more source
Symposium i Anvendt Statistik, 2010
Artiklen viser at en nummerering af indsamlede evalueringsskemaer kan afsløre gruppedannelse blandt de tilhørende studenter på et stort undervisningshold.Gruppedannelsen viser sig ved at sequenser med ens bedømmelse afviger fra en tilfældig fordeling defineret som en negativ binomialfordeling, der løber indtil to "succeer" er opnået.
openaire +2 more sources
Artiklen viser at en nummerering af indsamlede evalueringsskemaer kan afsløre gruppedannelse blandt de tilhørende studenter på et stort undervisningshold.Gruppedannelsen viser sig ved at sequenser med ens bedømmelse afviger fra en tilfældig fordeling defineret som en negativ binomialfordeling, der løber indtil to "succeer" er opnået.
openaire +2 more sources
Line formation in magnetic fields
Solar Physics, 1970Hyder (1968) has suggested that longitudinal magnetograph measurements of weak magnetic fields in prominences have underestimated field strengths as the result of zero-field levelcrossing interference (the Hanle effect). Hyder (1968) also suggested that resonance polarization effects have sometimes led to errors in measurements of the transverse ...
openaire +1 more source
Circuit World, 1992
Driven by the demand for higher density in electronic packaging, each signal plane of printed wiring board must accommodate more conductors. As a result, conductor width is becoming narrower each year. This chapter reviews some of the important steps of forming finer line conductors in printed wiring boards, such as surface preparation, plating/etching,
openaire +1 more source
Driven by the demand for higher density in electronic packaging, each signal plane of printed wiring board must accommodate more conductors. As a result, conductor width is becoming narrower each year. This chapter reviews some of the important steps of forming finer line conductors in printed wiring boards, such as surface preparation, plating/etching,
openaire +1 more source
Line Formation in Expanding Atmospheres
1976The current state of understanding of line formation processes in expanding atmospheres is reviewed, and the successes and limitations of current computational techniques are summarized. Some results for differential rotation are also given, although very little work has been done in this area. Special attention is given to the severe difficulties that
openaire +1 more source
The Formation of FeII Emission Lines
1988The excitation of FeII emission lines is reviewed, with special emphasis on photoionized nebulae. The physical conditions, the geometry and the techniques required to calculate FeII models are explained and the following mechanisms discussed: a: Excitation by absorption of continuum radiation. b: Excitation by inelastic collisions, and c: Excitation by
openaire +1 more source