نتایج جستجو برای: لیزر er

تعداد نتایج: 57646  

با استفاده از معادلات نرخ لیزر خود سامانده نقطه کوانتومی ایندیم گالیم آرسناید - گالیم آرسناید، تابع انتقال این نوع لیزر استخراج و ارائه می شود بطوریکه با بهره گیری از آن می توان انواع تحلیلهای حوزه زمان و پایداری در حوزه فرکانس را انجام داد. در حوزه زمان، تابع انتقال ارائه شده رفتار حالت گذرا و دائمی لیزر را به صورت یکجا محاسبه می کند. همچنین این تابع انتقال می تواند در شبیه سازهای مداری نظیر ا...

ساخت افزودنی به کمک لیزر بر پایه پودر، یکی از روشهای کارآمد ساخت لایه ای است که با استفاده از توان بالای لیزر در ساخت قطعات پلیمری مورد استفاده قرار می‌گیرد. تنش‌های حرارتی ناشی از لیزر موجب بروز اعوجاج و انقباض در قطعه می‌شود. تنش‌های حرارتی لیزر از گرادیان‌های حرارتی که توسط لیزر و سایر پارامترهای دستگاه بوجود می‌آیند، ناشی می‌شود. کاهش گرادیان‌های حرارتی موجب کاهش تغییر شکل‌ها در قطعه و افزا...

Alireza Abdollahi, Issa Jahanzad Sara Sheikhbahaei Somaye Safinejad

  Background and Objectives: The most prevalent malignancy among women is known to be breast cancer (BC). Several factors contribute to determining tumor prognosis and treatment strategies. In this study, the frequency and relevance of these factors are discussed. Materials and Methods: This cross-sectional study was carried out on 214 patients with BC, who referred to the Cancer Institute of...

F Badie, M Jolehar, S Rahrotaban, S Samani,

Background and aim: Pemphigus vulgaris (PV) is an autoimmune disorder that can clinically manifest as oral mucosal ulcers. Several researchers believe that the level of female sex hormones such as estrogen and progesterone could be effective in the pathogenesis and growth of lesions such as desquamative gingivitis. Studies related to oral ulcers have revealed contradictory results regarding the...

A. Heidari, J. Raeisi , R. Kamgar,

Cumulative absolute velocity (CAV), Arias intensity (AI), and characteristic intensity (CI) are measurable characteristics to show collapse potential of structures, evaluation of earth movement magnitude, and detection of structural failure in an earthquake. In this paper, parameters which describe three characteristics of ground motion have been investigated by using wavelet transforms (WT). I...

, , Gholami, M. , Mostaan, H. , Sonboli, A. ,

In this research, gas tungsten arc welding of dissimilar joint between 4130 low alloy steel and AISI 201 austenitic stainless steel was investigated. Four filler metals i. e. ERNiCr-3, ER 309L, ER 308L and ER 80SB2 were used. After welding, microstructural features of various areas and also fracture surfaces were examined using optical microscopy and scanning electron microscopy. Tensile test w...

حقیقی, فاطمه, شریفی سیستانی, نوریه, صادقیان, محمدهادی, همایی, فاطمه,

Background and Aim: Breast carcinoma is a pervasive malignancy in the world, and in our country-Iran-as well. Extensive studies have been done on its diagnostic and therapeutic procedures and factors affecting its prognosis. The present study aimed at determining proliferative rate of cells, the condition of steroid hormone receptors, correlation of these with each other and with other factors ...

Journal: :Tidsskrift for Den norske legeforening 2018

Journal: :journal of lasers in medical sciences 0
reza fekrazad laser research center in medical sciences (lrcms) - periodontal department, faculty of dentistry, aja university of medical sciences, tehran, iran hanieh nokhbatolfoghahaei laser research center of dentistry, dental research institute, tehran university of medical sciences, tehran, iran farzaneh khoei laser research center of dentistry, dental research institute, tehran university of medical sciences, tehran, iran katayoon am kalhori iranian medical laser associations, tehran, iran

introduction: pyogenic granuloma (pg) is a common tumor-like growth of the oral cavity, considered to be of non-neoplastic nature, often caused by constant low-grade trauma as well as poor oral hygiene and maybe due to hormonal disturbances. surgical excision, and removal of underlying cause in some cases, is the preferred method of treatment as it is only a benign lesion. in order to remove th...

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