فیلترها/جستجو در نتایج    

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متن کامل


نویسندگان: 

Baghernejhad Elnaz

اطلاعات دوره: 
  • سال: 

    1402
  • دوره: 

    11
  • شماره: 

    2
  • صفحات: 

    29-60
تعامل: 
  • استنادات: 

    0
  • بازدید: 

    174
  • دانلود: 

    29
چکیده: 

ABSTRACT Despite a wide range of components and criteria affecting travel behavior presented through empirical research, the results of these studies are inconclusive, which could be due to the difference between these components and criteria in the study areas. Therefore, this research presented a method to determine which factors in different PHYSICAL developments affect travel behavior due to the differences in various PHYSICAL developments. The required information was collected through 271 questionnaires at the level of three neighborhoods of Monirieh, Koye Bimeh, and Koye Golestan in Tehran, Iran, as the old, conventional, and new neighborhoods, respectively. ANOVA test was exerted to analyze the significant difference between different development patterns in three neighborhoods. Dunnett's T3 was applied to determine which neighborhood caused the difference between groups. Also, the factors affecting travel behavior were obtained based on exploratory factor analysis indicators. Finally, by comparing the results of the ANOVA test and regression analysis, it was discovered that factors such as car ownership, dependence and pro-liking for private cars, density and access to educational centers and parks, access to medical and service centers, and variety and density of retail stores had been introduced as the factors affecting travel behavior due to the differences in development patterns. However, proximity to the public transportation station, accessibility preferences in choosing a residence, dependence, and pro-liking for other than a private car, having a license, number of children under five years old, and age have influenced travel behavior regardless of the variation between neighborhoods. Extended Abstract Introduction Finding factors affecting travel behavior has been one of the main concerns of transportation planners. However, in the last two decades, the importance of the influence of the features of the built environment, including land use, along with demographic-economic characteristics, travel behavior, and attitudes of people, has been raised by urban planners. Studies seek to find factors affecting travel behavior, especially land use characteristics. Despite presenting a wide range of components and criteria affecting travel behavior, the results of the studies are inconclusive, which could be due to the difference between these components and criteria in the study areas. Therefore, this research presented a method to determine which factors in different PHYSICAL developments affect travel behavior due to the differences in various PHYSICAL developments. In order to do this, it must first be determined whether the study areas/different development patterns have a significant difference in terms of travel behavior or not. In case of a positive answer to the previous question, the following question is which study areas caused this difference. The next question arises: -Which PHYSICAL and non-PHYSICAL characteristics affect travel behavior due to distinctions between different development patterns?   Methodology The present research method is analytical and experimental based on quantitative methods. This research chose the frequency of travel by private car, public transportation, and walking as the travel behavior. According to the research's purpose, indicators and criteria affecting travel behavior were extracted after reviewing the theoretical and experimental literature. Then, the required information was collected through 271 questionnaires at the level of three neighborhoods of Monirieh, Koye Bimeh, and Koye Golestan as the old, conventional, and new neighborhoods, respectively. The questionnaire was compiled as a Likert scale in five parts of travel information, demographic-economic characteristics, perceptual characteristics of land use, travel habits, and access preferences of people in choosing their residence. ANOVA test was used to analyze the significant difference between different groups of a characteristic (here, different development patterns or the three case studies). Dunnett T3 was exerted to determine which neighborhood caused the difference between groups. Also, the factors affecting travel behavior were obtained based on exploratory factor analysis indicators. Finally, by comparing the results of the ANOVA test and regression analysis, it was discovered which factors affecting travel behavior were due to the differences in study areas and which factors affect travel behavior regardless of development patterns.   Results and discussion This research aims to identify the factors affecting travel behavior due to the differences in development patterns. In this regard, the findings in line with the first research question show that the frequency of three modes of travel, by private car, transportation, and pedestrian, differ significantly in the three neighborhoods. Furthermore, ANOVA test results depict that there is a significant difference between these three neighborhoods in terms of factors affecting travel behavior, such as perceptually environmental characteristics of the neighborhood, dependence and pro-liking for personal cars, variety and density of retail stores, density and access to educational units and parks, access to medical and service centers, and car ownership. Finally, by comparing the results of the ANOVA test with the regression analysis assessing the relationship between PHYSICAL and non-PHYSICAL factors (the same indicators in the same study areas) with travel behavior, the factors affecting travel behavior owing to different development patterns were identified. Factors such as car ownership, dependence and pro-liking for private cars, density and access to educational units and parks, access to medical and service centers, and variety and density of retail stores have been introduced as the factors affecting travel behavior due to the differences in development patterns. However, proximity to the public transportation station, accessibility preferences in choosing a place of residence, dependence, and pro-liking for other than a private car, having a certificate, number of children under five years old, and age have influenced on travel behavior regardless of the variation between neighborhoods (different PHYSICAL development patterns).   Conclusion In In order to discover the factors affecting travel behavior due to the differences in patterns of PHYSICAL development, this research has provided a more detailed analysis of the factors affecting travel behavior. It has achieved more accurate components than previous studies in this regard. Detailed analysis of studies related to travel behavior and finding the main components affecting it, considering the extent of variables and data, can pave the way for professionals in transportation planning and urban planning, in addition to providing detailed methods and criteria in the related literature.   Funding There is no funding support.   Authors’ Contribution Authors contributed equally to the conceptualization and writing of the article. All of the authors approved thecontent of the manuscript and agreed on all aspects of the work declaration of competing interest none.   Conflict of Interest Authors declared no conflict of interest.   Acknowledgments  We are grateful to all the scientific consultants of this paper.

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اطلاعات دوره: 
  • سال: 

    1401
  • دوره: 

    12
  • شماره: 

    47
  • صفحات: 

    75-93
تعامل: 
  • استنادات: 

    0
  • بازدید: 

    138
  • دانلود: 

    11
چکیده: 

Background: The expansion of the use of audio and video media technology has faced society with many medical, cultural and economic challenges. In the meantime, excessive use of mobile phones can cause many problems. Objective: The aim of this study was to construct and validate a questionnaire on PHYSICAL and psychological injuries of mobile phones. Method: The method of the present study was descriptive-correlational and confirmatory factor analysis. The statistical population of the study consisted of all citizens of Khorramabad with a diploma or higher in 1399, which was selected as a statistical sample by available sampling method of 200 people online and virtual. Results: The results showed that the factorized PHYSICAL and psychological harm questionnaire of cell phone with 42 questions and 10 components (fear of loss, vibration syndrome, duck syndrome, nomophobia, insomnia, hearing problem, eye syndrome, tunnel and neck syndrome SMS) and has good reliability, validity and flexibility in terms of psychometrics. Discussion and Conclusion: The questionnaire of factor analysis of PHYSICAL and psychological injuries of mobile phones can be used to identify and study the PHYSICAL and psychological injuries of mobile phones.

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نویسندگان: 

DESHPANDE S.D. | OJHA T.P.

اطلاعات دوره: 
  • سال: 

    1993
  • دوره: 

    56
  • شماره: 

    -
  • صفحات: 

    89-98
تعامل: 
  • استنادات: 

    1
  • بازدید: 

    250
  • دانلود: 

    0
کلیدواژه: 
چکیده: 

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

بازدید 250

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

DUTTA S.K. | NEMA V.K. | BHARDWAJ R.K.

اطلاعات دوره: 
  • سال: 

    1988
  • دوره: 

    39
  • شماره: 

    4
  • صفحات: 

    259-268
تعامل: 
  • استنادات: 

    1
  • بازدید: 

    202
  • دانلود: 

    0
کلیدواژه: 
چکیده: 

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بازدید 202

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اطلاعات دوره: 
  • سال: 

    1401
  • دوره: 

    12
  • شماره: 

    47
  • صفحات: 

    95-111
تعامل: 
  • استنادات: 

    0
  • بازدید: 

    178
  • دانلود: 

    27
چکیده: 

Sluggish Cognitive Tempo is used to describe a particular type of attention deficit, concentration, and slowness in information processing. The aim of this study was to investigate the psychometric PROPERTIES of the Sluggish Cognitive Tempo Scale (SCTS) of the parent form among Iranian children. The present study is a descriptive study. A sample of 1700 people was selected from the provinces of Tehran, East Azerbaijan, West Azerbaijan, Kurdistan, Fars and Khorasan using cluster sampling method. 122 subjects were excluded from statistical analysis due to incomplete answers to the questionnaires and thus the final sample was reduced to 1578 parents. The confirmatory factor analysis method and internal consistency were used to compute the Sluggish Cognitive Tempo Scale factorial validity and reliability, respectively. Also, in order to examine the construct validity of the Sluggish Cognitive Tempo Scale, we computed correlations between different dimensions of Sluggish Cognitive Tempo Scale with Attention Deficit Subscale of Mental Health Assessment Questionnaire for Children and Adolescents. The results of statistical results showed that this scale has structural validity, criterion and convergence in Iranian society. The results indicate that the scale is three factors and also the validity of the scale using Cronbach's alpha method and retest test after Approved two weeks. According to the findings of the present study, the parent form of the Sluggish Cognitive Tempo Scale (SCTS) has a good validity and reliability and it can be used in research related to slow cognitive multiplication in Iranian society.

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اطلاعات دوره: 
  • سال: 

    1402
  • دوره: 

    7
  • شماره: 

    1
  • صفحات: 

    17-31
تعامل: 
  • استنادات: 

    0
  • بازدید: 

    12
  • دانلود: 

    0
چکیده: 

موضوع تحقیق: سیستم بایندر برپایه پلی بوتادین خاتمه یافته با گروه هیدروکسیل (HTPB)، شامل دی اکتیل سباسات به عنوان نرم کننده (DOS) و تولوئن دی ایزوسیانات به عنوان عامل پخت می باشد. واکنش بین گروه هیدروکسیل رزین HTPB با گروه ایزوسیانات عامل پخت تولید شبکه پلی یورتانی می کند تا منجر به تولید یک لاستیک با خواص مطلوب شود. در این کار پژوهشی بررسی خواص رئولوژیکی و مکانیسمی سیستم بایندر در حضور سه ماده شیمیایی به عنوان تأخیرانداز پلیمریزاسیون تشکیل پلی یورتان شامل اگزالیک اسید، مالئیک اسید و تتراسایکلین انجام و خواص فیزیکی آنها بررسی و مقایسه شد. روش تحقیق: اگزالیک اسید، مالئیک اسید و تتراسایکلین با مکانیسم های ویژه ای خواص سیستم بایندر را تغییر می دهند. اگزالیک اسید و مالئیک اسید در واکنش با گروه ایزوسیانات عامل پخت تولید آمید کرده و گرانروی سیستم بایندر را کاهش می دهند. تتراسایکلین نیز با توجه به ساختار شیمیایی خود، با عامل پخت وارد واکنش شده و از پیشرفت واکنش اصلی که بین رزین HTPB و عامل پخت TDI است، جلوگیری کرده و در نتیجه باعث کاهش گرانروی می شود. همچنین برای بررسی مکانیسم عملکردی این ترکیبات از طیف سنجی تبدیل فوریه فروسرخ (FT-IR) استفاده شد. در این طیف سنجی شدت طیف های مربوط به هر نمونه با یکدیگر مقایسه و نوع عملکرد و مکانیسم هر کدام از تأخیراندازهای اگزالیک، مالئیک اسید و تتراسایکلین مشخص شد. خواص سختی و تورم نیز برای نمونه ها اندازه گیری و مقایسه شد. نتایج اصلی: نوع ساختار محصول واکنش بین رزین HTPB و تأخیراندازهای اگزالیک اسید، مالئیک اسید و تتراسایکلین با عامل پخت توسط FT-IR مشخص و تایید شد. بررسی طیف های FT-IR درجا نشان داد شدت پیک ایزوسیانات بعد از گذشت 60/90 دقیقه کاهش پیدا می کند. بررسی رفتار شیمی رئولوژیکی نشان داد که به طورکلی در غلظت 05/0% بهترین عملکرد از تأخیراندازها مشاهده می شود و در بین این سه؛ به ترتیب تتراسایکلین با حدود 54%، اگزالیک اسید با حدود 48% و مالئیک اسید با حدود 47% بیشترین میزان کاهش در افزایش ویسکوزیته را داشته است. افزودن 05/0% از تتراسایکلین به سیستم بایندر احتمالاً به علت درگیری بیشتر با عامل پخت منجر به کاهش حدود 20% دانسیته اتصالات عرضی شده که نشان دهنده عملکرد بهتر این ماده به عنوان تأخیرانداز واکنش می باشد.

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

MILLS K.C. | KEENE B.J.

اطلاعات دوره: 
  • سال: 

    1987
  • دوره: 

    32
  • شماره: 

    -
  • صفحات: 

    1-120
تعامل: 
  • استنادات: 

    1
  • بازدید: 

    220
  • دانلود: 

    0
کلیدواژه: 
چکیده: 

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بازدید 220

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نویسندگان: 

PEARSON T.C. | SLAUGHTER D.C.

نشریه: 

TRANSACTIONS OF THE ASAE

اطلاعات دوره: 
  • سال: 

    1994
  • دوره: 

    37
  • شماره: 

    3
  • صفحات: 

    913-918
تعامل: 
  • استنادات: 

    3
  • بازدید: 

    160
  • دانلود: 

    0
کلیدواژه: 
چکیده: 

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بازدید 160

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نویسندگان: 

SINGH K.K. | GOSWAMI T.K.

اطلاعات دوره: 
  • سال: 

    1996
  • دوره: 

    64
  • شماره: 

    2
  • صفحات: 

    93-98
تعامل: 
  • استنادات: 

    2
  • بازدید: 

    272
  • دانلود: 

    0
کلیدواژه: 
چکیده: 

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بازدید 272

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نویسندگان: 

FRASER B.M. | VERMA S.S. | MUIR W.E.

اطلاعات دوره: 
  • سال: 

    1978
  • دوره: 

    23
  • شماره: 

    1
  • صفحات: 

    53-57
تعامل: 
  • استنادات: 

    1
  • بازدید: 

    216
  • دانلود: 

    0
کلیدواژه: 
چکیده: 

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بازدید 216

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