نتایج جستجو برای: improved model

تعداد نتایج: 2466432  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شاهد - دانشکده دندانپزشکی 1394

مقدمه و هدف: یکی از عوامل موفقیت در درمانهای ترمیمی، ممانعت از نفوذ و رشد میکروب در حد فاصل ماده ترمیمی و دندان (ریزنشت) می باشد. افزودن 2% وزنی نانوذرات زینک اکساید (nzno) به سمان گلس آیونومر اصلاح شده با رزین با نام تجاریgc fuji ii lc (improved) خواص ضد میکروبی آن را بدون تغییر معنی داری در خواص استحکام خمشی و مدول الاستیسیته افزایش داده است. با توجه به ضرورت بررسی اثر نانوذرات زینک اکساید بر...

The most important features and phenomena of the deformation behavior of rockfills are stress-dependent stiffness, hardening and dilative (or contractive) behaviors, as well as breakage, rotation and redistribution of particle size. An elasto-plastic constitutive model has been suggested by Vermeer and de Borst to simulate the shear behavior of soils, concretes and rocks. This research has trie...

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 2010
mohammad zahedzadeh saeed abbasi mitra dadvar seyed reza shadizadeh

an improved model of mud dispersion has been introduced in this work. the advantages of this model consist of a new analytical correlation for dispersivity by using resistivity log data and using a new aspect of capacitance dispersion model. mathematical formulations were expressed, solved by numerical model taking advantage of actual log and formation data. achieved results yielded reasonable ...

Journal: :avicenna journal of phytomedicine 0
mahin dianat physiology research center and department of physiology, faculty of medicine, ahvaz jundishapur university of medical sciences, ahvaz, iran negin amini physiology research center and department of physiology, faculty of medicine, ahvaz jundishapur university of medical sciences, ahvaz, iran mohammad badavi physiology research center and department of physiology, faculty of medicine, ahvaz jundishapur university of medical sciences, ahvaz, iran yaghoub farbood physiology research center and department of physiology, faculty of medicine, ahvaz jundishapur university of medical sciences, ahvaz, iran

objective: in ventricular arrhythmias, due to their free radical scavenging action, antioxidant agents are usually used in the treatment of cardiovascular disease. since stress is considered as risk factor for increased mortality by causing malignant arrhythmias, the study was designed to evaluate the cardioprotective effects of ellagic acid (ea) on cacl2-induced arrhythmias in rat stress model...

Journal: :مجله علوم اعصاب شفای خاتم 0
fatemeh alipour shefa neuroscience research center, khatam alanbia hospital, tehran, iran. fariba karimzadeh shefa neuroscience research center, khatam alanbia hospital, tehran, iran. gholamreza hasanzadeh department of anatomy, tehran university of medical sciences, tehran, iran.

triazine derivatives are small synthetic peptides with no apparent toxicity and high target specificity in central nervous system. hippocampal tissue is the most vulnerable area in the alzheimer’s disease (ad). the aim of this study was to investigate the neuroprotective effect of triazine in ad induced by intra-cerebro-ventricular (i.c.v.) administration of streptozotocine (stz). male wistar, ...

پایان نامه :دانشگاه تربیت معلم - سبزوار - دانشکده برق و کامپیوتر 1394

پنل های خورشییدی دارای مشیه ه جریان -ولتاژ غیر خطی بوده و تنها در یک نقطه کار خاص، حداکثر توان را تولید می کنند. این نقطه بهینه توان با تغییر دما و شیدت نور تغییر می کند. روش های مهتلفی برای ردیابی نقطه حداکثر توان به صورت free model و based model معرفی شده است. این تحقیق روش جدیدی جهت بهبود عملکرد ردیابی نقطه حداکثر توان پنل های خورشیدی جدا از شبکه ارائه می دهد و الگوریتم روش پیشینهادی از دو...

Journal: :the modares journal of electrical engineering 2010
reza arablouei ayaz ghorbane

in this paper, a new propagation model based on utd for multiple diffraction paths in cellular mobile radio communications in urban environments is proposed. moreover, the most rigorous novel utd-based expressions for multiple diffractions by buildings and excess path losses are d - rived and analyzed. for this purpose, building rows are supposed to have rectangular cross-sections with the same...

Journal: :anesthesiology and pain medicine 0
kyoko sasauchi department of dental anesthesiology, school of life dentistry at tokyo, the nippon dental university, tokyo, japan; the nippon dental university, school of life dentistry at tokyo, department of dental anesthesiology, 1-9-20 fujimi chiyodaku tokyo 102-8159, japan. tel: +81-332616083, fax: +81-332220926 katsuhisa sunada department of dental anesthesiology, school of life dentistry at tokyo, the nippon dental university, tokyo, japan tatsuo nakamura department of bioartificial organs, institute for frontier medical sciences, kyoto university, kyoto, japan

background continuous epidural analgesia with catheterization is a useful technique, because it has a wide adaptation range and provides prolonged analgesia. problems that may arise from long-term epidural analgesia are changes in the analgesic area, duration of analgesia and catheter-related problems. few articles have evaluated gradual changes of long-term epidural analgesia. in the animal mo...

Journal: :تحقیقات نظام سلامت 0
آرش نجیمی کارشناس ارشد، گروه آموزش بهداشت و ارتقای سلامت، دانشکده بهداشت، دانشگاه علوم پزشکی اصفهان، اصفهان، ایران. لیلا آزاد بخت استادیار، مرکز تحقیقات امنیت غذایی، دانشگاه علوم پزشکی اصفهان، اصفهان، ایران. اکبر حسن زاده مربی، گروه آمار زیستی و اپیدمیولوژی، دانشکده بهداشت، دانشگاه علوم پزشکی اصفهان، اصفهان، ایران. غلامرضا شریفی راد دانشیار، گروه آموزش بهداشت و ارتقای سلامت، دانشکده بهداشت، دانشگاه علوم پزشکی اصفهان، اصفهان، ایران.

background: the purpose of this study was to evaluate short-term application of nutritional education program based on the basnef model on the elderly people with type-2 diabetes. methods: in this randomized controlled trial, 100 diabetic elders (≥60 years) were chosen who were divided into intervention and control groups, randomly. data of control and intervention groups were collected at base...

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