Results 91 to 100 of about 484,828 (297)

Simple Application of Time Correlated Single Photon Counter of Picosecond Pulsed Laser to Measure Refractive Index of Saline Solution

Jurnal Penelitian Fisika dan Aplikasinya, 2019
Time correlated single photon counter was design for measuring fluorescence lifetime of emitting materials. It was designed for photonics basic research and science that is usually done in a laboratory.
Isnaeni Isnaeni, Reynaldi Gilang Mulyawan, Ahmad Reza Hakimi   +2 more
doaj   +1 more source

Thermal Characterization and Lifetime Prediction of LED Boards for SSL Lamp [PDF]

, 2013
This work presents a detailed 3-D thermo-mechanical modelling of two LED board technologies to compare their performance. LED board are considered to be used in high power 800 lumen retrofit SSL (Solid State Lighting) lamp.
Formanek, J., Jakovenko, J.
core   +1 more source

Electron Evaporation from an Ultracold Plasma in a Uniform Electric Field

, 2010
Electrons in an expanding ultracold plasma are expected to be in quasi-equilibrium, since the collision times are short compared to the plasma lifetime, yet we observe electrons evaporating out as the ion density decreases during expansion.
Rolston, S. L., Twedt, K. A.
core   +1 more source

Vestibular Patient Journey: Insights From Vestibular Disorders Association (VeDA) Registry

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Vestibular symptoms impose a high burden of disability. Understanding real‐world diagnostic and treatment pathways can identify care gaps and guide interventions. We aimed to characterize symptom profiles, diagnostic trends, provider involvement, and treatment patterns in vestibular disorders.
Ali Rafati, Sami I. Nassar, Shaun A. Nguyen, Patricia L. Gerend, Michael C. Schubert, Michael T. Teixido, Frederick A. Godley, Joel A. Goebel, Cynthia A. Ryan, Habib G. Rizk, Amir Kheradmand   +10 more
wiley   +1 more source

Calculation of positron lifetime of compound semiconductors

Acta Physica Sinica, 2010
On the basis of of local density approximation (LDA) and general gradient approximation (GGA), positron annihilation information has been calculated for five types of compound semiconductors, which are ZnO, GaN, GaAs, SiC and InP. The calculated information includes distribution of positron density, distribution of positron annihilation rate density ...
null Chen Xiang-Lei, null Zhang Jie, null Du Huai-Jiang, null Zhou Xian-Yi, null Ye Bang-Jiao   +4 more
openaire   +1 more source

Positron lifetime calculation for the elements of the periodic table

Journal of Physics: Condensed Matter, 2007
Theoretical positron lifetime values have been calculated systematically for most of the elements of the periodic table. Self-consistent and non-self-consistent schemes have been used for the calculation of the electronic structure in the solid, as well as different parametrizations for the positron enhancement factor and correlation energy.
Campillo Robles, José Miguel, Ogando Arregui, Eduardo, Plazaola Muguruza, Fernando   +2 more
openaire   +4 more sources

A Prospective Study of Individuals at Risk of Multiple Sclerosis Informs the Design of Primary Prevention Studies

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective In multiple sclerosis, the optimal time for deploying a therapeutic intervention is before the central nervous system is damaged; given the success of trials treating the earliest stage of MS, the radiologically isolated syndrome, developing primary prevention strategies is an important next challenge.
Amy W. Laitinen, Ceren Tozlu, Tina Roostaei, Fatoumata Diallo, Kaho Onomichi, Jiyeon Son, Zongqi Xia, Philip L. De Jager   +7 more
wiley   +1 more source

Dynamic energy balanced max flow routing in energy-harvesting sensor networks

International Journal of Distributed Sensor Networks, 2017
We propose a dynamic energy balanced max flow routing algorithm to maximize load flow within the network lifetime and balance energy consumption to prolong the network lifetime in an energy-harvesting wireless sensor network.
Bin Cai, Shan-Li Mao, Xiao-Hui Li, Yue-Min Ding   +3 more
doaj   +1 more source

Weapons barrel life cycle determination

Vojnotehnički Glasnik, 2013
This article describes the dynamic processes within the gun barrel during the firing process in exploitation. It generally defines the basic principles of constructing tube elements, and shows the distortion of the basic geometry of the tube interior due
Nebojša Pene Hristov, Gordana R. Jovičić   +1 more
doaj   +1 more source

The effects of the geosynchronous energetic particle radiation environment on spacecraft charging phenomena [PDF]

, 1977
The energetic electron environment at the geosynchronous orbit is responsible for a variety of adverse charging effects on spacecraft components. The most serious of these is the degradation and failure of a complementary-metal-oxide-semiconductor (CMOS)
Gaines, E. E., Imhof, W. L., Reagan, J. B.   +2 more
core   +1 more source