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Scientific Information Database (SID) - Trusted Source for Research and Academic Resources
Scientific Information Database (SID) - Trusted Source for Research and Academic Resources
Scientific Information Database (SID) - Trusted Source for Research and Academic Resources
Scientific Information Database (SID) - Trusted Source for Research and Academic Resources
Scientific Information Database (SID) - Trusted Source for Research and Academic Resources
Scientific Information Database (SID) - Trusted Source for Research and Academic Resources
Scientific Information Database (SID) - Trusted Source for Research and Academic Resources
Scientific Information Database (SID) - Trusted Source for Research and Academic Resources
Issue Info: 
  • Year: 

    1396
  • Volume: 

    3
  • Issue: 

    6
  • Pages: 

    56-64
Measures: 
  • Citations: 

    0
  • Views: 

    302
  • Downloads: 

    0
Abstract: 

در این کار با در نظر گرفتن گرانش اصلاح یافته ی f(T) به عنوان یکی از نامزدهای گرانشی انرژی تاریک که در آن T مقدار عددی پیچش می باشد، رفتارهای دینامیکی این مدل ها را بررسی کرده و شرایط بقای کیهانی را برای آن ها بدست آورده ایم. ما نشان می دهیم که دو مسیر کیهانی با دوام در فضای فاز برای این دسته از مدل های انرژی تاریک وجود دارد: 1) عالم از یک نقطه ی ناپایدار تابشی شروع و با عبور از یک نقطه ی زینی ماده وارد دوره ی شتاب دار دوسیته می شود. 2) عالم از یک نقطه ی زینی تابشی وارد یک دور ه ی پایدار مادی شده و نمی تواند وارد دوره ی کنونی با غالبیت انرژی تاریک گردد.

Yearly Impact: مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

View 302

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Issue Info: 
  • Year: 

    1396
  • Volume: 

    3
  • Issue: 

    6
  • Pages: 

    43-55
Measures: 
  • Citations: 

    0
  • Views: 

    1510
  • Downloads: 

    0
Abstract: 

توسعه فناوری ها و گسترش صنایع از یک سو، رشد فزاینده جمعیت در سرتاسر دنیا از سوی دیگر، باعث شده بسیاری از معادلات و روابط دنیای امروز بر مبنای دادو ستد انرژی و تکنولوژی های مربوطه استوارباشد. در این بین نیاز کشورهای در حال توسعه همچون ایران به منابع انرژی برای رشد و پیشرفت در همه زمینه ها از اهمیت زیادی برخوردار است. بنابراین به نظر می رسد آشنایی با منابع انرژی، کمبودها و محدویت ها در قالب برنامه درسی می تواند به پرورش شهروندی مسئول و آگاه در آینده کمک کند. از طرفی با توجه به تغییراتی که در سال های اخیر در رویکرد کتب علوم تجربی رخ داده و بیشترین تاکید این کتاب ها بر آموزش از طریق فرایند علمی است، در این مقاله سعی شده است با استفاده از روش تحلیل محتوا کمی، میزان توجه محتوای کتب به آموزش مبحث انرژی از طریق فرایند علمی مورد بررسی قرار گیرد. برای جمع آوری اطلاعات، ابتدا صفحاتی از کتاب که به مبحث مورد نظر پرداخته اند، جدا شده و سپس جملات مربوط با توجه به مهارت به کار برده شده طبقه بندی شده اند. جدول مربوط به شمارش جملات در نرم افزار اکسل وارد شده و نمودارهای مربوط رسم گردیدند.

Yearly Impact: مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

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Issue Info: 
  • Year: 

    2017
  • Volume: 

    3
  • Issue: 

    6
  • Pages: 

    1-12
Measures: 
  • Citations: 

    0
  • Views: 

    3299
  • Downloads: 

    0
Abstract: 

Of the most important duties of teachers in the educational process, establish healthy relationships with students. The student must go through the school and the teachers, socialization, learning and social skills needed by the community, both the success and progress and the advancement of society. The present paper attempts have been made with regard to the process of action research, management principles in communicating with students in math class offer. The important results obtained, the required precision in their behavior is general and specific. This is important since it is not verbal communication aspects and all actions, gestures, pointing, etc. are all contained messages and signs. Respect for all characters in any social position of the parties and the establishment of constructive engagement is the foundation of human dignity. Overall, eight practical approach to effective communication as hypothesis was tested in the crucible of the validation and recognition of good and evil were pure hypothesis.

Yearly Impact: مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

View 3299

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Author(s): 

Tajik Farnaz | ZARE ZAHRA

Issue Info: 
  • Year: 

    2017
  • Volume: 

    3
  • Issue: 

    6
  • Pages: 

    13-22
Measures: 
  • Citations: 

    0
  • Views: 

    5087
  • Downloads: 

    0
Abstract: 

by a total sight we can find out the new education system needs. these needs are going to be more operational as educations and learning these days. to achieve these goals which make students understand better we have to use action base new methods instead of those passive education methods. in this article we have suggested some of these skills and basic techniques, specially in science. for example we can name techniques like: using poster, traffic light system, visualization, peer set question, . . . that i'll explain them widely. We need some backgrounds to do these methods as good as possible; work in a group, be good at writing, have consideration and concentration. Teachers have to help their students to achieve these backgrounds from basic levels; for being more operational. we can not separate these methods completely, and it's better to use them together. so we can improve the students skills in different dimensions.

Yearly Impact: مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

View 5087

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Issue Info: 
  • Year: 

    2017
  • Volume: 

    3
  • Issue: 

    6
  • Pages: 

    23-30
Measures: 
  • Citations: 

    0
  • Views: 

    430
  • Downloads: 

    0
Abstract: 

The dynamic topic in high school physics books is a challenging topic we decided to investigate the cause of this weakness. For this reason we checked physical exam sheets in second-high school for the first semester in two high schools in Varamin city. We found that one of the problems is how to use Newton’ s second low. We designed a questionnaire for this problem. We give the useful results from the analysis of the answer sheets. These results can be helpful for the teaching dynamic topics. The dynamic topic in high school physics books is a challenging topic we decided to investigate the cause of this weakness. For this reason we checked physical exam sheets in second-high school for the first semester in two high schools in Varamin city. We found that one of the problems is how to use Newton’ s second low. We designed a questionnaire for this problem.

Yearly Impact: مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

View 430

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic ResourcesDownload 0 مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic ResourcesCitation 0 مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic ResourcesRefrence 0
Author(s): 

Moosapoor Mansooreh

Issue Info: 
  • Year: 

    2017
  • Volume: 

    3
  • Issue: 

    6
  • Pages: 

    31-42
Measures: 
  • Citations: 

    0
  • Views: 

    550
  • Downloads: 

    0
Abstract: 

Textbooks play an important role in shaping the national identity of students. The purpose of this research is to examine and analyze the national identity in the mathematical book (1) of the 10th grade of the secondary school. The method of research is quantitative and qualitative content analysis. The information gathering tool includes a checklist in content analysis, and the analytical unit is themed. The dimensions of national identity in this research are the symbol, value, cultural heritage, celebrities and characters, events and happenings. The statistical population of the mathematical library (1) is the 10th grade of the secondary school (mathematics and physics and experimental sciences) in 1396-1395. The results of the qualitative analysis show the emphasis on national values, attention to places and buildings in the cultural heritage, and the low use of hadiths, verses, literary order, and the lack of attention to economic values and contemporary celebrities. According to the results of the quantitative analysis, 132 references to the concept of national identity are mentioned in this book. Among the dimensions of national identity, the dimension of national values with 42. 31% of the highest frequency of events and happenings with 0/76% have the lowest frequency.

Yearly Impact: مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

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Author(s): 

Mohammadi Pour Naser

Issue Info: 
  • Year: 

    2017
  • Volume: 

    3
  • Issue: 

    6
  • Pages: 

    56-63
Measures: 
  • Citations: 

    0
  • Views: 

    152
  • Downloads: 

    0
Abstract: 

In this work we consider f(T) modified teleparallel gravity where T is the torsion scalar. This has been proposed as the natural gravitational alternative for dark energy. We perform a detailed dynamical analysis of these models and find conditions for the cosmological viability of f(T) dark energy models as geometrical constraints on the derivatives of these models. We show that in the phase space exists two cosmologically viable trajectory which (i) The universe would start from an unstable radiation point, then pass a saddle standard matter point which is followed by accelerated expansion de sitter point. (ii) The universe starts from a saddle radiation epoch, then falls onto the stable matter era and the system can not evolve to the dark energy dominated epoch. Finally, for a number of f(T) dark energy models were proposed in the more literature, the viability conditions are investigated. So, this gravity is the good candidate for dark energy.

Yearly Impact: مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

View 152

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