نتایج جستجو برای: compound parabolic concentrators cpcs
تعداد نتایج: 148359 فیلتر نتایج به سال:
INTRODUCTION Cardiospheres (CS) are self-assembling clusters of cells that can be grown from cardiac tissue. They contain a heterogeneous cell population that includes cardiac progenitor cells (CPCs) and cardiac fibroblasts. CS and CPCs have been shown to improve cardiac function after myocardial infarction (MI) in experimental models and are now being studied in clinical trials. The effects of...
A recent phase I clinical trial (SCIPIO) has shown that autologous c-kit+ cardiac progenitor cells (CPCs) improve cardiac function and quality of life when transplanted into patients with ischemic heart disease. Although c-kit is widely used as a marker of resident CPCs, its role in the regulation of the cellular characteristics of CPCs remains unknown. We hypothesized that c-kit plays a role i...
In this paper, we study the performance of packet concentrators with input queueing. A recent concentrator model given by Gündüzhan and Oruç considers packet concentrators with different input and output packet rates and gives a minimum crosspoint complexity construction for buffered sparse crossbar concentrators. We use this model as a basis for the performance evaluation of concentrators whic...
The maximum power cast on a collector from a source of finite angular extension by a concentrator of fixed position occurs when the collector sees the concentrator as a Lambertian source. Concentrators not fully meeting this requirement are evaluated using a parameter called the shape quality factor. Lambertian concentrators can be obtained with mirrors but not with lenses of finite n. In many ...
BACKGROUND Despite the promise shown by stem cells for restoration of cardiac function after myocardial infarction, the poor survival of transplanted cells has been a major issue. Hypoxia-inducible factor-1 (HIF1) is a transcription factor that mediates adaptive responses to ischemia. Here, we hypothesize that codelivery of cardiac progenitor cells (CPCs) with a nonviral minicircle plasmid carr...
Ischemic heart disease is characterized chronically by a healed infarct, foci of myocardial scarring, cavitary dilation, and impaired ventricular performance. These alterations can only be reversed by replacement of scarred tissue with functionally competent myocardium. We tested whether cardiac progenitor cells (CPCs) implanted in proximity of healed infarcts or resident CPCs stimulated locall...
Increased apoptosis of cardiac progenitor cells (CPCs) has been proposed as a mechanism of myocardial damage and dysfunction. Glucagon-like peptide-1 (GLP-1) has been shown to improve heart recovery and function after ischemia and to promote cell survival. The protective effects of GLP-1 on oxidative stress-induced apoptosis were investigated in human CPCs isolated from human heart biopsies. Me...
Profilometry is useful in detecting surface faults on solar concentrators, which can be imperfectly manufactured, thus affecting system performance. Profilometric analyses are performed a micro-parabolic trough collector (m-PTC), with reduced sizes and greater mirror curvature than usual PTC. The peculiar dimensions shape of this micro-PTC request to develop specific configuration laser profilo...
Soft strain sensors based on conductive polymer composites (CPCs) provide a simple and feasible detection tool in wearable electronics, soft machines, electronic skin, etc. However, the CPCs-based exhibit resistive viscoelasticity (or time-dependent properties) that hinder intuitive reflection of accurate calibration process. In this paper, CPCs with different carbon nanotubes (CNTs) black (CB)...
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