نتایج جستجو برای: vacuum electronic devices
تعداد نتایج: 448868 فیلتر نتایج به سال:
Nanoparticles of metals and semiconductors are promising for the implementation of a variety of photonic and electronic devices with superior performances and new functionalities. However, their successful implementation has been limited due to the lack of appropriate fabrication processes that are suitable for volume manufacturing. The current techniques for the fabrication of nanoparticles ei...
We discuss how matter-enhanced active-sterile neutrino transformation in the νe ⇀↽ νs and ν̄e ⇀↽ ν̄s channels could enable the production of the rapid neutron capture (r-process) nuclei in neutrino-heated supernova ejecta. In this scheme the lightest sterile neutrino would be heavier than the νe and split from it by a vacuum mass-squared difference of 3 eV <∼ δmes <∼ 70 eV with vacuum mixing angl...
We present a systematic approach to writing adjoint Higgs vacuum expectation values (vevs), which break a symmetry G to differently embedded isomorphic copies of a subgroup belonging to the chain G ⊃ H1 ⊃ · · · ⊃ Hl, as linear combinations of each other. Given an adjoint Higgs vacuum expectation value h breaking G → H, a full complement of vevs breaking G to different embeddings of the subgroup...
Alternative theories of gravity have been recently studied in connection with their cosmological applications, both in the Palatini and in the metric formalism. The aim of this paper is to propose a theoretical framework (in the Palatini formalism) to test these theories at the solar system level and possibly at the galactic scales. We exactly solve field equations in vacuum and find the corres...
a clinical evaluation of the gemstar® and the ambit® pumps for patient-controlled epidural analgesia
background patient-controlled analgesia is used for both labor and postoperative analgesia. objectives this study aimed to assess user satisfaction and functionality of two ambulatory, electronic patient controlled analgesia devices, the gemstar pump hospira inc., illinois, usa) and the ambit ambulatory infusion therapy pump (sorenson medical products, utah, usa). patients and methods it was a ...
This paper analyzes energy dissipation mechanisms in vacuum-operated in-phase and anti-phase actuated micromachined z-axis vibratory gyroscopes. The type of actuation is experimentally identified as the key factor to energy dissipation. For in-phase devices, dissipation through the die substrate is the dominant energy loss mechanism. This damping mechanism depends strongly on the die attachment...
The international standard for functional safety of systems involving programmable-electronic components, IEC 61508, has been valid since the late 1990's, and Version 2 has just become valid [IEC10]. The scope of the standard is, generally, everything except avionics and medical equipment. It is based on the approach, novel at that time, of quantifying and reducing risk until it is acceptable, ...
Phenomenological results of equal time, point to point spatial correlation functions of hadronic currents are used to deduce the structure of the QCD vacuum. It is found that a model with only quark condensate is not adequate to explain the observations. Inclusion of condensate fluctuations (explicit four point structure in the vacuum) leads to excellent overall agreement with the phenomenologi...
the electronic and magnetic properties of the hypothetical compounds of mc (m=al, ga and in) are investigated by using first-principle calculations and pseudopotential plane wave self-consistent field method based on density functional theory. in order to find the most stable phase of mc (m=al, ga and in), we study them in zinc-blende (zb), rocksalt (rs), wurtzite and nias crystal structures. w...
Electronic devices primarily use electronic rather than ionic charge carriers. Using soft-contact lamination, we fabricated ionic junctions between two organic semiconductors with mobile anions and cations, respectively. Mobile ionic charge was successfully deployed to control the direction of electronic current flow in semiconductor devices. As a result, these devices showed electroluminescenc...
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