نتایج جستجو برای: insertion loss
تعداد نتایج: 503537 فیلتر نتایج به سال:
background and aims: nowadays miniscrews are widely used as skeletal anchorage in orthodontics. however the success rate of miniscrews is less than that of osseointegrated implants. the aim of this retrospective study was to evaluate factors influencing the success rate of orthodontic miniscrews. materials and methods: data of 244 miniscrews in 122 patients (99 females and 23 males, with a mean...
The effect of hearing aid experience (measured as years of hearing aid use and user insertion gain at octave frequencies from 250 Hz to 4000 Hz) on the selection of preferred insertion gain under six listening conditions and one vocalization condition was examined. Thirteen experienced hearing aid users selected their preferred insertion gain in each test condition using a modified simplex proc...
The pH-selective insertion and folding of a membrane peptide, pHLIP [pH (low) insertion peptide], can be used to target acidic tissue in vivo, including acidic foci in tumors, kidneys, and inflammatory sites. In a mouse breast adenocarcinoma model, fluorescently labeled pHLIP finds solid acidic tumors with high accuracy and accumulates in them even at a very early stage of tumor development. Th...
BACKGROUND Placing a central venous access device via the internal jugular or subclavian vein entails significant risks to both patient and healthcare worker. PURPOSE The purpose of this randomized, prospective study was to determine whether the accelerated Seldinger technique (AST) offers significant safety advantages over the modified Seldinger technique (MST) for peripherally inserted cent...
We have studied 46 patients to compare the efficacy of the auditory evoked potential (AEP) index, bispectral index (BIS), 95% spectral edge frequency (SEF) and median frequency (MF) in predicting movement in response to insertion of the laryngeal mask airway (LMA). Anaesthesia was induced with target-controlled infusions of propofol and alfentanil. After loss of eyelash reflex and adequate jaw ...
This paper presents a low loss and high selective lowpass filter which is implemented using suspended stripline (SSL) technology. The proposed structure is comprised of a 13th order generalized Chebyshev lowpass filter which enjoys integrated waveguide-to-SSL transitions. This filter is designed and fabricated to be used as lowpass channel of a U-band diplexer employed in frontend of a U-band d...
In the last two decades, various flexural plate-wave (FPW)-based biosensors with low phase velocity, low operation frequency, high sensitivity, and short response time, have been developed. However, conventional FPW transducers have low fabrication yield because controlling the thickness of silicon/isolation/metal/piezoelectric multilayer floating thin-plate is difficult. Additionally, conventi...
For V-band applications, this paper presents a fully embedded multi-layer dielectric waveguide filter (DWGF) with very low insertion loss and small size, which does not need any more assemblies such as flip-chip bonding and bond wires. The top and bottom plane are grounded, and therefore, although we make a metal housing, there will be no resonance occurrences. Especially, the proposed structur...
Background and Aim: Heterogeneous insertion of Organizational affiliations can cause loss of ranking points in the national and international levels. So, we decided to investigate the different affiliations of Shahid Beheshti University of Medical Sciences in scientific publications that indexed in Web of Science and their effect on the result of research activities evaluation in the year 2012....
In this paper, a new analytical design technique for three-section wideband Wilkinson power divider is presented. The proposed utilizes the dual-frequency behavior of commensurate transmission lines even-mode analysis and contributes set completely rigorous equations odd-mode analysis. Measurement fabricated prototype utilizing shows an excellent return-loss (>16 dB), insertion loss (<3.3...
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