هدف از این مقاله، بررسی اثر نانو ذرات بر راندمان گردآورنده های خورشیدی صفحه تخت می باشد. در این مطالعه روش سنتز مستقیم برای آماده سازی نانوسیال مس بر پایه آب به عنوان یک سیال کاری آزمایش( سیال عامل) و در یک گردآورنده خورشیدی(تخت) به کار گرفته شده است. در این شرائط روش93 ashrae برای آزمایش گردآورنده های خورشیدی مورد استفاده قرار گرفته است. با توجه به نتایج تجربی حاصل، بازده کلی زمانی که غلظت نان...

Around 18% of global carbon emissions can be attributed to building heating or cooling, driven by the adoption “international” thermal comfort standards such as ASHRAE-55, which imply an homogenous indoor environment. We argue that importation warm climates results in cold discomfort due “overcooling”: a phenomenon anecdotally recognised worldwide but not studied defined systematically. Unlike ...

The notion of choice has been characterised as one of the regulating agents of intrinsicmotivation. A study being carried out at the Université H. Poincaré is investigating the effect ofchoice on cognitive and affective engagement during listening tasks. The study compares twogroups of English language learners specialising in other disciplines. The aim of the study is toattempt...

The purpose of applying the high-energy γ-ionizing radiation with doses up to 100 kGy was to enable controllable change of mechanical properties of high impact polystyrene (PS-HI) and, at the same time, to investigate the possibility of using reprocessed irradiated polymeric material. Dielectric relaxation of radiation modifi ed high impact polystyrene (PS-HI) has been investigated below the po...

Nitrogen supplied by N2 fixation to soybean [Glycine max (L.) Merr.] may not be sufficient to maximize yield. Field studies were conducted in 2002, 2003, and 2004 on Sharkey clay soil (very-fine, smectitic, thermic Chromic Epiaquert) at Stoneville, MS (33 269 N lat). The objective was to determine the effect of high rates of N applied as a replacement for N2 fixation in nonirrigated and irrigat...

nature) can usually be explained by either increased pleural fluid formation or decreased pleural fluid absorption, or both. Pleural effusions caused by an increase in pleural fluid formation can be further subdivided into elevation in hydrostatic pressure (e.g., congestive heart failure), decreased colloid osmotic pressure (e.g., cirrhosis, nephrotic syndrome), increased capillary permeability...