نتایج جستجو برای: primary knowledge and thrust forces

تعداد نتایج: 16956992  

پایان نامه :وزارت علوم، تحقیقات و فناوری - پژوهشگاه علوم انسانی و مطالعات فرهنگی - دانشکده ادبیات، زبانهای خارجی و تاریخ 1391

abstract english language learning in iran has become significant in recent years, and english has been included in the curriculum of iranian schools and universities, and considerable attention has been paid to this language in our society. nevertheless, teaching and learning english in iranian schools has not been able to satisfy the specified goals, so different efl institutes have been est...

Background: The present study was conducted to quantify the relationships between bone drilling process parameters(i.e., feed rate, resting time, exit rate, and drill bit diameter) and drilling outcome parameters (i.e., thrust force andmaximum temperature).Methods: This study utilized 10-cm cortical bovine samples to evaluate the effects of four independent parameters,in...

پایان نامه :دانشگاه آزاد اسلامی - دانشگاه آزاد اسلامی واحد گرمسار - پژوهشکده علوم انسانی و اجتماعی 1390

this study was an attempt to investigate and compare the effect of lexical inferencing and concept mapping on developing vocabulary retention of iranian language learners. sixty homogeneous students from different intact classes who were being taught as intermediate learners in sokhan english institute participated in this study. they were in different classes. a teacher made test as a pre-test...

پایان نامه :دانشگاه تربیت معلم - سبزوار - دانشکده ادبیات و علوم انسانی 1389

abstract this study aimed at investigating the impact of etymology strategy instruction on the development of vocabulary of iranian intermediate efl learners. etymology, knowledge of origin of words, roots, and affixes, has proved to be a controversial issue and a question of long debate with regard to its impact on the process of vocabulary learning. this study employed etymology strategy in ...

ژورنال: طلوع بهداشت یزد 2015
رشیدی جهان, حجت, سنایی نسب, هرمز, صفاری, محسن,

Introduction: Personal hygiene is one of the most important preventive tools in the field of public health, and military forces may be exposed to threats due to non-adherence to principles of personal hygiene. The aim of this study was assessing the situation of personal hygiene among military forces and identifying its determinants and related potential barriers. Methods: This is a cross-sec...

2017
Wenjuan Hao Yu Wang

Linear flux-switching permanent magnetic (LFSPM) machines are good choices for long stroke applications. These machines deliver high thrust force density in addition to the machine structure where permanent magnetics (PMs) and windings are all on the short mover. For LFSPM machines, their performance is always affected by big thrust force ripple. In this paper, for two C-core LFSPM machines of ...

Journal: :The Journal of experimental biology 2006
John O Dabiri Sean P Colin John H Costello

Fast-swimming hydromedusan jellyfish possess a characteristic funnel-shaped velum at the exit of their oral cavity that interacts with the pulsed jets of water ejected during swimming motions. It has been previously assumed that the velum primarily serves to augment swimming thrust by constricting the ejected flow in order to produce higher jet velocities. This paper presents high-speed video a...

2016
Felipe Treviso Marilia A. Silveira Aly F. Flores Filho David G. Dorrell

This paper presents a study on an induction planar actuator concept. The device uses the same principles as a linear induction motor in which the interaction between a travelling magnetic field and a conducting surface produces eddy currents that leads to the generation of a thrust force and can result in movement over a metallic surface. This can benefit the inspection of metallic surfaces bas...

Journal: :The Journal of experimental biology 2009
Jeanette L Lim M Edwin Demont

The American lobster (Homarus americanus) displays a diverse set of locomotory behaviours that includes tail flips, walking and paddling. Paddling is carried out by the four pairs of paddle-shaped pleopods on the ventral abdomen. Although it is recognized that pleopod-generated fluid flows have some locomotory role in adults, reports on their relative importance in locomotion are inconsistent. ...

1999
John S. Orme Robert L. Sims

Flight tests recently completed at the NASA Dryden Flight Research Center evaluated performance of a hydromechanically vectored axisymmetric nozzle onboard the F-15 ACTIVE. A flight-test technique whereby strain gages installed onto engine mounts provided for the direct measurement of thrust and vector forces has proven to be extremely valuable. Flow turning and thrust efficiency, as well as no...

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