نتایج جستجو برای: defect

تعداد نتایج: 95186  

پایان نامه :وزارت علوم، تحقیقات و فناوری - پژوهشگاه دانشهای بنیادی (مرکز تحقیقات فیزیک نظری و - پژوهشکده علوم نانو 1392

among the low–dimensional allotropes of carbon, nanotubes and graphene have attracted very much attention from nano–science and nanotechnology specialists. they have been proposed as building blocks in nanometer device engineering. however, these structures are not defect–free. in this thesis, we focused on defective carbon nanotubes and graphene, and studied the effect of couple of very common...

پایان نامه :وزارت بهداشت، درمان و آموزش پزشکی - دانشگاه علوم پزشکی و خدمات بهداشتی درمانی استان کرمان 1380

ترمیم ‏‎asd primum‎‏ درافراد با رنج سنی متفاوت معمولا در برگیرنده عوارض کوتاه مدت و تاخیری می باشد. مابصورت مطالعه توصیفی و گذشته نگر در صدد تعیین نتایج جراحی با تکنیک اصلاح شده در بیماران با نقص ‏‎‏‎(partial a-v canal defect)sdprimum‎‏ در مراکز جراحی قلب کرمانشاه از سال 1373 تا مهرماه 1380 می باشیم.

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس - دانشکده مهندسی برق و کامپیوتر 1389

در این پایان نامه، رفتار استاتیک ساختارهای آرایه ای پادهدایت vcsel، شبیه سازی و آنالیز شده است. برای تحلیل مشخصه های نوری (میدان نزدیک و دور)، گرمایی (توزیع دما) و اکتریکی (چگالی حامل) ساختار، از مدل نسبتاً جامعی که شامل معادلات موج، پخش حامل و انتقال گرما و اثرات متقابل پدیده های نوری، گرمایی و الکتریکی است، استفاده گردیده است. دو گروه از vcselهای آرایه ای پادهدایت، بررسی شده اند: آرای? تزویج ...

Journal: :research in cardiovascular medicine 0
maziar gholampour-dehaki heart valve disease research center, rajaie cardiovascular medical and research center, iran university of medical sciences, tehran, ir iran asghar zareh heart valve disease research center, rajaie cardiovascular medical and research center, iran university of medical sciences, tehran, ir iran solmaz babaki heart valve disease research center, rajaie cardiovascular medical and research center, iran university of medical sciences, tehran, ir iran; department of cardiology, ludmillenstift hospital, ludmillenstraße, meppen, germany hoda javadikasgari heart valve disease research center, rajaie cardiovascular medical and research center, iran university of medical sciences, tehran, ir iran; department of thoracic and cardiovascular surgery, cleveland clinic foundation, cleveland, ohio, usa; heart valve disease research center, rajaie cardiovascular medical and research center, vali-asr st., niayesh blvd, p. o. box: 1996911151, tehran, ir iran. tel: +1-6822192494

patients and methods previously recorded data of 231 patients who underwent surgical closure of vsd between january 2009 and january 2012 at the rajaie cardiovascular medical and research center were retrospectively reviewed. vsd surgical repair was performed using continues suturing technique in group a patients (n = 163, 70.6%) and interrupted suturing technique in group b patients (n = 68, 2...

Journal: :the journal of tehran university heart center 0
bagher nikyar gorgan congenital malformations research center, golestan university of medical sciences, gorgan, iran. maliheh sedehi gorgan congenital malformations research center, golestan university of medical sciences, gorgan, iran. mostafa qorbani department of public health, alborz university of medical sciences, karaj, iran and non-communicable diseases research center, endocrinology and metabolism research insti- tute, tehran university of medical sciences, tehran, iran. arash nikyar cranfield university, london, england. mohammadjafar golalipour gorgan congenital malformations research center, golestan university of medical sciences, gorgan, iran.

background: congenital heart disease (chd) is the most common congenital anomaly in newborns. this study was performed to determine the live birth incidence of chd by ethnicity and sex in gorgan, northern iran. methods: in this longitudinal, hospital-based study, 18162 live births in dezyani hospital in gorgan, north of iran, were screened for chd, from 2007 through 2009. clinical examination, ...

Journal: :the journal of tehran university heart center 0
ali akbar zeinaloo children’s medical center, tehran university of medical sciences, tehran, iran. seyyed mahmoud meraji shaheed rajayee cardiovascular center, iran university of medical sciences, tehran, iran. keyhan sayadpour zanjani children’s medical center, tehran university of medical sciences, tehran, iran. mohammad reza mirzaaghayan imam khomeini hospital complex, tehran university of medical sciences, tehran, iran.

background: closure of patent ductus arteriosus (pda), ventricular septal defect (vsd) and atrial septal defect (asd) can be done surgically or by device. this study was designed to compare the total cost of surgical or device closures of pda, asd or vsd for iranian patients. methods: this is a cross-sectional study, conducted from january 1, 2005 until january 1, 2006 in two large heart center...

Journal: :the journal of tehran university heart center 0
ramin baghaei tehrani rajaee heart center, iran university of medical sciences, tehran, iran. alireza rostami rajaee heart center, iran university of medical sciences, tehran, iran. hosein ali basiri rajaee heart center, iran university of medical sciences, tehran, iran. hojatollah mortezaiian rajaee heart center, iran university of medical sciences, tehran, iran.

this is a case presentation of a 26-year-old woman with a moderate-sized atrial septal secundum defect (17mm) who underwent catheterism, during which an amplatzer septal occluder number 26 was inserted successfully. on the second postoperative day, she deteriorated and a clinical examination showed a typical tamponade. after a percutaneous aspiration of the pericardial cavity and transient impr...

Journal: :medical journal of islamic republic of iran 0
masoud motasaddi zarandy otolaryngology department, amiralam hospital, saadi ave.,tehran, iranسازمان اصلی تایید شده: دانشگاه علوم پزشکی تهران (tehran university of medical sciences) mojgan kiani asiabar otolaryngology department, amiralam hospital, saadi ave.,tehran, iranسازمان اصلی تایید شده: دانشگاه علوم پزشکی تهران (tehran university of medical sciences) layla mostaan otolaryngology department, amiralam hospital, saadi ave.,tehran, iranسازمان اصلی تایید شده: دانشگاه علوم پزشکی تهران (tehran university of medical sciences) arman taheri otolaryngology department, amiralam hospital, saadi ave.,tehran, iranسازمان اصلی تایید شده: دانشگاه علوم پزشکی تهران (tehran university of medical sciences) safa samadzadeh otolaryngology department, amiralam hospital, saadi ave.,tehran, iranسازمان اصلی تایید شده: دانشگاه علوم پزشکی تهران (tehran university of medical sciences)

background: lip carcinoma is a common cancer with a good prognosis and when patients refer early in the course of disease the results of treatment are acceptable. surgical procedures for reconstruction of lip defects are the use of remaining lip tissue, tissue from the opposite lip, adjacent cheek tissue, distant flaps and microvascular free flaps. the bitemporal (visor) flap is a regional flap...

Journal: :the journal of tehran university heart center 0
akbar shahmohammadi shaheed rajaie cardiovascular medical and research center, tehran, iran. nader givtaj shaheed rajaie cardiovascular medical and research center, tehran, iran. seyed mohammad dalili shaheed rajaie cardiovascular medical and research center, tehran, iran. rahman ghaffari shaheed rajaie cardiovascular medical and research center, tehran, iran.

congenital left ventricular diverticulum is a rare cardiac malformation. two categories of congenital ventricular diverticulum have been identified with regard to their localization: apical and non-apical. apical diverticula are always associated with midline thoraco-abdominal defects and other heart malformations. non-apical diverticula are always isolated defects. diagnosis is established by ...

Journal: :iranian journal of nuclear medicine 2003
mohsen saghari mohammad taghavi armaghan fard-esfahani babak fallahi mohammad eftekhari

fixed myocardial defects in both stress and rest images, could be artifactual as a result of soft tissue attenuation. to increase specificity and identify the false positive results, we used gated technique to evaluate the wall motion and wall thickening as an index to differentiate real ischemic lesions from artifactual defects. 93 patients were studied. in 46 patients (48.8%) fixed perfusion ...

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