نتایج جستجو برای: q factor measurement
تعداد نتایج: 1355681 فیلتر نتایج به سال:
We have developed a new technique for accurate measurement of the loss of superconducting microstrips at mm-wave frequencies. In this technique, we optically couple power to slot antenna, which is connected to one port of a hybrid coupler. One of the output ports of the hybrid delivers power to a series of mm-wave microstrip resonators which are capacitively coupled to a feedline followed by an...
The compact and reliable ultraviolet (UV) source has attracted remarkable attention for its potential use in optical measurement systems, high-density storage, biomedical applications. We demonstrate generation by frequency doubling a lithium-tantalate-on-insulator (LTOI) microdisk via modal phase matching. 50-µm-diameter was milled focused ion beam (FIB) followed chemo-mechanical polishing (CM...
Background: Nomophobia is the fear of being disconnected from one’s mobile phone, prevailing in modern area. To the best of our knowledge, no Persian psychometric scales are available for investigating nomophobia among Iranians. Therefore, we here aimed to translate and validate the Nomophobia Questionnaire (NMP-Q) for being used in Iran. Methods:...
در این پایان نامه روابط مربوط به المان های فشرده شامل خازن، سلف و مقاومت در روش fdtd با روابط روش split-field که از روش های بسیار مناسب برای تحلیل ساختارهای پریودیک است، ترکیب و برخی تغییرات به منظور پیاده سازی این روش با مرز جذبی upml در جهت پایدار شدن تکنیک ایجاد شده است که نتایج بدست آمده با نتایج روش fem تطابق دارند. با استفاده مناسب از المان های فشرده شامل خازن، سلف و مقاومت در ساختار سطوح...
Bound states in the continuum (BICs) offer novel mechanisms to boost quality factor (Q-factor) of resonances. Unfortunately, current studies on chiral BICs metasurfaces suffer from a fundamental trade-off between Q-factor and circular dichroism (CD), presenting significant hurdle that severely limits independent control CD Q-factors. Here, 3D plasmonic are numerically demonstrated overcome high...
There is a significant discrepancy between the values of the proton electric form factor, G(E)(p), extracted using unpolarized and polarized electron scattering. Calculations predict that small two-photon exchange (TPE) contributions can significantly affect the extraction of G(E)(p) from the unpolarized electron-proton cross sections. We determined the TPE contribution by measuring the ratio o...
2 ABSTRACT. Although extensively presented as one of the most promising silicon-based micromachined sensor adapted to real-time measurements in liquid media, the cantilevered structure still suffers from its quality factor (Q) dramatic dependence on the liquid viscosity thus lowering the measurement resolution. In this paper, micromachined piezoelectric membranes are introduced as a potential a...
Trust highlights as an important factor in helping citizens to overcome the perceived risks. Accordingly, the in-depth investigation of citizen’s trust has become a necessity for researchers and practitioners to understand citizens' acceptance of e-government in developed countries in general, and developing countries in particular. This research paper proposes a theoretical model to achieve th...
We have measured the turbidity for a series of solutions of polymethylmethacrylate in 3-octanone ~PMMA/3-OCT! with various polymer molecular weights. The obtained correlation length ~j! and the osmotic compressibility ~x! show power law dependence on both the reduced temperature e 5(T2Tc)/Tc and the degree of polymerization N of the polymer chains, i.e., j;N e and x;Ne, with the associated scal...
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