نتایج جستجو برای: non commuting graph

تعداد نتایج: 1495573  

Journal: :Proceedings of the London Mathematical Society 2007

Journal: :BMJ 2017
Carlos A Celis-Morales Donald M Lyall Paul Welsh Jana Anderson Lewis Steell Yibing Guo Reno Maldonado Daniel F Mackay Jill P Pell Naveed Sattar Jason M R Gill

Objective To investigate the association between active commuting and incident cardiovascular disease (CVD), cancer, and all cause mortality.Design Prospective population based study. Setting UK Biobank.Participants 263 450 participants (106 674 (52%) women; mean age 52.6), recruited from 22 sites across the UK. The exposure variable was the mode of transport used (walking, cycling, mixed mode ...

2017
Ione Avila-Palencia Audrey de Nazelle Tom Cole-Hunter David Donaire-Gonzalez Michael Jerrett Daniel A Rodriguez Mark J Nieuwenhuijsen

INTRODUCTION Active commuting - walking and bicycling for travel to and/or from work or educational addresses - may facilitate daily, routine physical activity. Several studies have investigated the relationship between active commuting and commuting stress; however, there are no studies examining the relationship between solely bicycle commuting and perceived stress, or studies that account fo...

Journal: :Journal of Transport and Land Use 2021

As a sustainable mode of travel, walking for transportation has multiple environmental, social, and health-related benefits. In existing studies, however, such rarely been differentiated between commuting non-commuting trips. Using multilevel zero-inflated negative binomial regression Tobit models, this study empirically examines the frequency duration their correlates in Xiamen, China. It find...

Journal: :Algebraic structures and their applications 2017

Throughout this paper, R will denote a commutative ring with identity and M is a unitary R- module and Z will denote the ring of integers. We introduce the graph Ω(M) of module M with the set of vertices contain all nontrivial non-essential submodules of M. We investigate the interplay between graph-theoretic properties of Ω(M) and algebraic properties of M. Also, we assign the values of natura...

Prime graph of a ring R is a graph whose vertex set is the whole set R any any two elements $x$ and $y$ of $R$ are adjacent in the graph if and only if $xRy = 0$ or $yRx = 0$.  Prime graph of a ring is denoted by $PG(R)$. Directed prime graphs for non-commutative rings and connectivity in the graph are studied in the present paper. The diameter and girth of this graph are also studied in the pa...

Journal: :The journal of applied research on children : informing policy for children at risk 2010
Jason A Mendoza Kathy Watson Tom Baranowski Theresa A Nicklas Doris K Uscanga Nga Nguyen Marcus J Hanfling

BACKGROUND: Children's active commuting to school, i.e. walking or cycling to school, was associated with greater moderate-to-vigorous physical activity, although studies among ethnic minorities are sparse. OBJECTIVES: Among a low-income, ethnic minority sample of fourth grade students from eight public schools, we examined (1) correlates of active commuting to school and (2) the relationship b...

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