نتایج جستجو برای: stress analysis

تعداد نتایج: 3186417  

Journal: :iran agricultural research 2007
a. shekoofa y. emam

the aim of the present investigation was to study the growth, yield and yield components of maize (zea mays l.) single cross 704 under different levels of irrigation, plant density, and ethephon in southern iran where this particular crop has not yet been studied in detail. a field experiment was performed in the 2004 5 growing season at the experimental farm of the college of agriculture, shir...

2015
Rachel Hayes-Harb

Introduction Russian belongs typologically to what are termed non-predictable stress languages (Altmann) or lexical stress languages (Kijak); that is, stress is not phonologically specified, but must be encoded in each word’s lexical representation. Pedagogical materials for beginning learners of Russian indicate the position of stress for virtually all words; the prevalent mechanism for this i...

Journal: :iranian red crescent medical journal 0
somaieh borjalilu department of e-learning in medical education, virtual school, tehran university of medical sciences, tehran, ir iran aeen mohammadi department of e-learning in medical education, virtual school, tehran university of medical sciences, tehran, ir iran rita mojtahedzadeh department of e-learning in medical education, virtual school, tehran university of medical sciences, tehran, ir iran; department of e-learning in medical education, virtual school, tehran university of medical sciences, tehran, ir iran. tel: +98-2188978088, fax: +98-2188969594

results the overall perceived stress mean was 32.02 (sd = 5.08). eighty-three percent of the medical students perceived stress. students in clinical phase perceived more stress than basic sciences ones [or 2.25, 95% ci 1.809 - 4.032]. logistic regression analysis showed demographic (including gender and residential status), psychosocial and academic factors and the phase of study as sources of ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تهران 1340

چکیده ندارد.

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی امیرکبیر(پلی تکنیک تهران) - دانشکده مهندسی 1386

بافتهای زنده در محیطهای تحت تنش زندگی می کنند و می توان گفت هنگامی که این بافتها تحت بار نیستند نیز دارای تنش می باشند. به این تنش مانده در بافت تنش پسماند(residual stress) و به کرنش ناشی از آن کرنش پسماند گفته می شود.هدف از این تحقیق مطالعه بر روی میزان تنش های پسماند موجود در دیسک بین مهره ای (intervertebral disc) می باشد.جهت دستیابی به این هدف دیسک بین مهره ای موجود در ناحیه دم گاو مورد مطال...

Canonical discriminant analysis (CDA) in combination with cluster analysis and genotype by trait (GT) biplot analysis methods were used to assess 9 wheat cultivars having different degrees of tolerance along with 36 F1 hybrids derived from partial diallel crosses, using stress tolerance indices, in two levels (well watered and cessation of irrigation at pollination stage). Cluster analysis clas...

Journal: :journal of plant physiology & breeding 2012
masoumeh nemati ali asghari omid sofalian ali rasoulzadeh hamidreza mohamaddoust chamanabad

abstract to study the effect of water stress in rapeseed cultivars at the seedling stage, 10 rapeseed cultivars were evaluated at three irrigation levels [normal irrigation (control) and irrigation after depletion of 60 and 85% of available soil water]. analysis of variance showed considerable variation among cultivars. water stress reduced all of the studied morphological characteristics, espe...

Journal: :پژوهش های تولید گیاهی 0

the effect of drought on the seed yield and some associated characteristics of common been under normal and drought stress conditions and determination of durable genotypes to drought were studied by planting 32 genotypes in two separate augmented designs in normal and stress conditions. these genotypes were evaluated in randomized complete block design with 3 replications in the field of facul...

Journal: :تولید گیاهان زراعی 0
زهرا تقی پور دانش آموخته کارشناسی ارشد، گروه اصلاح نباتات، دانشگاه محقق اردبیلی رسول اصغری ذکریا دانشیار گروه اصلاح نباتات، دانشگاه محقق اردبیلی ناصر زارع استادیار گروه اصلاح نباتات، دانشگاه محقق اردبیلی پریسا شیخ زاده مصدق استادیار گروه اصلاح نباتات، دانشگاه محقق اردبیلی

in order to evaluate drought tolerance of some aegilops triuncialis ecotypes a factorial experiment based on a completely randomized design was conducted under non-stress and drought stress (irrigation until 50% of heading) condition in the greenhouse of mohaghegh ardabili university in 2012. drought tolerance and susceptibility indices for grain yield were calculated and principal component an...

Journal: :iranian journal of materials forming 2014
mehrdad aghaie-khafri mohamad-hossen gozin

using cold working fastener holes is a simple life enhancement procedure that strengthens metallic components by retarding crack growth around a hole. in the present paper, the residual stress field that is induced by the hole expansion process is obtained based on different material models namely elastic perfect plastic, isotropic hardening and kinematic hardening using three-dimensional finit...

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