نتایج جستجو برای: new energies
تعداد نتایج: 1893861 فیلتر نتایج به سال:
We present a new measurement of the cosmic-ray positron fraction e + =(e + + e) obtained from the rst balloon ight of the High Energy Antimatter Telescope (HEAT). Using a magnet spectrometer combined with a transition radiation detector, an electromagnetic calorimeter, and time-of-ight counters we have achieved a high degree of background rejection. Our results do not indicate a major contribut...
Parallel, standby and series configurations are different types of power switch configuration that can be considered in semiconductor switches to improve the reliability of power electronic converters and theirs lifetime, especially in specific application such as high power industrial applications, satellites, power electronic interface for renewable energies and etc. In this paper, the reliab...
مواد ضدعفونی کننده نقش مهمی را در کنترل باکتری های عامل فساد در صنایع غذایی و مکان های عمومی دارند. آب الکترولیز شده بعنوان یک ضدعفونی کننده جدید در سال های اخیر مورد توجه قرار گرفته است. آب الکترولیز شده ایمن، بی خطر، ارزان و بر روی بسیاری از باکتری ها، قارچ ها و ویروس ها موثر است. این مطالعه در دو بخش انجام گرفت. در مطالعه نخست، تاثیر آب الکترولیز خنثیnew))، اسید سیتریک 1%، ترکیب آب الکترولیز...
We present a new parton model approach for nuclear collisions at RHIC energies (and beyond). It is a selfconsistent treatment using the same formalism for calculating cross sections like σtot or σinel and, on the other hand, particle production. Actually, the latter one is based on an expression for the total cross section, expanded in terms of cut Feynman diagrams. Dominant diagrams are assume...
COMPTEL, aboard the Compton Gamma-Ray Observatory , has detected at MeV energies PSR B1951+32 and found indications for a signal from PSR B0656+14. In the combined COMPTEL { EGRET spectra it is apparent that the maximum luminosities of these objects are reached in the COMPTEL energy range, or at least spectral features/bumps are apparent. These spectra can be compared with those of four other p...
introduction: nowadays new radiochromic films have an essential role in radiotherapy dosimetry. properties such as high sensitivity, good reproducibility, high spatial resolution, easy readout and portability have made them attractive for dosimetry, especially in high-dose-gradient regions. material and methods: in this study, electron-beam dose distributions in homogenous and heterogeneous pha...
A recently proposed computational protocol is employed to obtain highly accurate atomization energies for the full G2/97 test set, which consists of 148 diverse molecules. This computational protocol is based on the explicitly correlated coupled-cluster method with iterative single and double excitations as well as perturbative triple excitations, using quadruple-ζ basis sets. Corrections for h...
Introduction: Cone-beam CT (CBCT) is an imaging system which offers three-dimensional (3D), multiplanar images and has many advantages over computed tomography (CT) including shorter acquisition times for the resolution desired in dentistry, lower radiation dose to the patient, reasonable price and higher spatial resolution but CBCT scanners are unable to display actual Hounsf...
We complete the analysis of meson resonance contributions to chiral low-energy constants of O(p 4) by including all quark-antiquark bound states with orbital angular momentum ≤ 1. Different tensor meson Lagrangians used in previous work are shown to produce the same final results for the low-energy constants once QCD short-distance constraints are properly implemented. We also discuss the possi...
the present study has tried to accomplish an analysis of margaret atwood’s novels oryx and crake, and the year of the flood in the light of posthuman and cyborg theories. considering posthumanism as a critical reading of some notions of humanism focus of which in this thesis has been identity, new definitions for humanity and human identity are formed. haraway’s cyborg, as one possible new figu...
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