Seasonal and socio-demographic determinants of school commuting
نویسندگان
چکیده
منابع مشابه
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فرض کنیمg یک گروه غیر آبلی متناهی باشد . گراف جابجایی g که با نماد نمایش داده می شود ،گرافی است ساده با مجموعه رئوس که در آن دو راس با یک یال به هم وصل می شوند اگر و تنها اگر . مکمل گراف جابجایی g راگراف نا جابجایی g می نامیم.و با نماد نشان می دهیم. گرافهای جابجایی و ناجابجایی یک گروه متناهی ،اولین بار توسطاردوش1 مطرح گردید ،ولی در سالهای اخیر به طور مفصل در مورد بحث و بررسی قرار گرفتند . در ،م...
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متن کاملPrevalence and socio-demographic correlates of active commuting to school in a nationwide representative sample of German adolescents.
OBJECTIVE To assess the prevalence and socio-demographic correlates of walking and cycling to school in a nationwide representative cross-sectional sample of German adolescents. METHODS A sample of 1828 German adolescents aged 11-17 years were examined between 2003 and 2006. Mode of commuting to school was assessed using a reliable self-report measure. Socioeconomic status, migration backgrou...
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ژورنال
عنوان ژورنال: Preventive Medicine
سال: 2011
ISSN: 0091-7435
DOI: 10.1016/j.ypmed.2010.12.006