نتایج جستجو برای: relations and interactions create a complicated system

تعداد نتایج: 20569476  

Journal: :Proceedings of the National Academy of Sciences 2008

H. Ahmadian, H. Jalali , S. Nazari ,

Abstract: The governing equations of motion for a drill string considering coupling between axial, lateral and torsional vibrations are obtained using a Lagrangian approach. The result leads to a set of non-linear equations with time varying coefficients. A fully coupled model for axial, lateral, and torsional vibrations of drill strings is presented. The bit/formation interactions are assumed ...

Journal: Religious Inquiries 2013

Islam as a universal religion has a special approach for establishment of international relations. Different dimensions of this approach can be found in the accounts of the Prophet’s (s) interactions with other nations. Theoretical foundations of Islamic international relations, inspired by Qur’anic principles, have consolidated the mechanism of these relations in practice. Meantime, a survey o...

Journal: :journal of biomedical physics and engineering 0
a allahverdy department of medical physics & biomedical engineering, school of medicine, tehran university of medical sciences, tehran, iran. s rahbar department of medical physics & biomedical engineering, school of medicine, tehran university of medical sciences, tehran, iran. r r mirzaei department of immunology, school of medicine, tehran university of medical sciences, tehran, iran. m ajami department of immunology, faculty of medical sciences, tarbiat modares university, tehran, iran. a namdar department of immunology, school of medicine, isfahan university of medical sciences, isfahan, iran. s habibi department of immunology, school of medicine, tehran university of medical sciences, tehran, iran.

background: there are many studies to investigate the effects of each interacting component of tumor-immune system interactions. in all these studies, the distinct effect of each component was investigated. as the interaction of tumor-immune system has feedback and is complex, the alternation of each component may affect other components indirectly. objective: because of the complexities of tum...

Journal: :علوم اجتماعی 0
ندا رضوی زاده دکتر محسن نوغانی دخت بهمنی دکتر علی یوسفی

abstract previous research have shown that physical and mental illness and mortality are influenced by class status, material life standards, genetics and infection, but today social context attracted attention. in this paper social capital as a composition of social trust, support and relations seen as a mental health determinant. the aim of this paper is examining the relationship between soc...

ژورنال: آموزش عالی ایران 2021

The student’s Life-world, as the reference groups of community in the future, must be deeply explored and described in all its complexities, dimensions, elements and details. Therefore, the place of informal interactions of students as part of this Life-world is important in this study. The main purpose of the present study is that describe the students' mental perception of their informal inte...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه سمنان - دانشکده علوم انسانی 1393

charles dickens was a voracious reader even in his childhood. his early reading of seventeenth- and eighteenth-century picaresque fiction greatly influenced his writing style. his first novel, the pickwick papers, is a tale of rogues and swindlers, adventures and quests, satire and comedy, and innocence and experience. oliver twist, dickens’ second novel, is a young boy’s progress through a cor...

In this work, we give parallel transport frame of a curve and we introduce the relations between the frame and Frenet frame of the curve in 4-dimensional Euclidean space. The relation which is well known in Euclidean 3-space is generalized for the …rst time in 4-dimensional Euclidean space. Then we obtain the condition for spherical curves using the parallel transport frame of them. The conditi...

احمدی, سید احمد, اعتمادی, عذرا, قاسمی, سیمین,

The aim of this study was to determine the relationship between negative interactions of couple and family in law with intimacy and marital conflict. In this correlation study, 36 married women of Isfahan were selected in multi-stage random sampling and completed Marital Conflict Questionnaire, Intimacy Scale (IS) and Negative Interactions of Couple and Family in Law Researcher Made Questionnai...

Journal: :مدیریت دولتی 0
حنانه محمدی کنگرانی استادیار دانشکده کشاورزی و منابع طبیعی، دانشگاه هرمزگان، ایران تقی شامخی دانشیار دانشکده منابع طبیعی، دانشگاه تهران، ایران مهناز حسین زاده دانشجوی دکترای مدیریت صنعتی، دانشکده مدیریت، دانشگاه تهران، ایران:

in managing organizations as complex social systems that their core includes of human interactions or their complicated patterns of behavior, the precise definition of problem is very important; because interactions between organizations cause to emerging complex relationship networks which in it formal patterns are always affected by informal relationship networks. this paper analyses the form...

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