Results 51 to 60 of about 13,845,865 (385)
InGaN multiquantum wells—problem of carrier injection
Scientific ReportsThis study addresses the issue of effective carrier injection to quantum wells in laser diode structures. The nitride light emitting structures used in this study were fabricated by Metal-Organic Vapor Phase Epitaxy (MOVPE).
Agata Bojarska-Cieślińska +4 more
doaj +1 more source
Colloids and InterfacesThe hydrophilic–lipophilic balance (HLB) is a valuable parameter used to determine the relative hydrophobicity of a compound based on its chemical structure. This semi-empirical parameter has been instrumental in formulating oil-in-water and water-in-oil
Gary Smejkal +2 more
doaj +1 more source
Sinusoidal-pressure generator for testing dynamic pressure probes [PDF]
, 1970 Generator can produce sinusoidal pressures at frequencies from 300 to 5000 Hz and peak-to-peak amplitudes up to 5.6 lbs/sq in. Amplitude and phase-angle measurements made at various frequencies are compared with measurements from a piezoelectric ...
Englund, R., Jr. +2 more
core +1 more source
The Pressure of Radiation [PDF]
Nature, 1913 WITH reference to my letter on this subject in NATURE of December 18, the majority of my correspondents complain that, although I may have indicated the possibility of my own view, I have not shown why the simpler relation, that the pressure is always one-third of the energy density, is untenable. As I cannot reply to each individually, I shall be glad
openaire +2 more sources
The unpredictably eruptive dynamics of spruce budworm populations in eastern Canada
Population Ecology, EarlyView.We examine historical population data for spruce budworm from several locations through the period 1930–1997, and use density‐dependent recruitment curves to test whether the pattern of population growth over time is more consistent with Royama's (1984; Ecological Monographs 54:429–462) linear R(t) model of harmonic oscillation at Green River New ...
Barry J. Cooke, Jacques Régnière
wiley +1 more source
New paradigm for configurational entropy in glass-forming systems
Scientific Reports, 2022 We show that on cooling towards glass transition configurational entropy exhibits more significant changes than predicted by classic relation. A universal formula according to Kauzmann temperature $${T}_{K}$$ T K is given: $$S={S}_{0}{t}^{n}$$ S = S 0 t ...
Aleksandra Drozd-Rzoska +2 more
doaj +1 more source
Mechanical compression to characterize the robustness of liquid marbles [PDF]
, 2015 In this work, we have devised a new approach to measure the critical pressure that a liquid marble can withstand. A liquid marble is gradually squeezed under a mechanical compression applied by two parallel plates.
Binks, Bernard P. +3 more
core +3 more sources
Intracranial Pressure—Theory of the Driving Pressure and a New Pressure Index
Neurologia medico-chirurgica, 1978 In order to understand the pathogenesis of increased intracranial pressure, the concept of the driving pressure (DP) from the intracranial vascular system was proposed. The DP consists of combined pressure continuously transmitted from the arterial pressure (ADP) and venous pressure (VP) systems.
Naoki Kageyama +4 more
openaire +4 more sources
Acceleration and trapping of particles by radiation pressure
, 1970 Micron-sized particles have been accelerated and trapped in stable optical potential wells using only the force of radiation pressure from a continuous laser.
A. Ashkin
semanticscholar +1 more source
Geographic variation in walking activity in the red flour beetle Tribolium castaneum
Population Ecology, EarlyView.This study examined whether there is geographic variation in field populations, focusing on the moving activity in the red flour beetle Tribolium castaneum. Results showed significant differences in moving activity among field populations but no correlation with latitude or meteorological factors.
Kentarou Matsumura
wiley +1 more source