نتایج جستجو برای: ratio dating

تعداد نتایج: 516686  

2012
Sherry Hamby David Finkelhor Heather Turner

Objective: To examine the co-occurrence of physical teen dating violence (TDV) with other forms of victimization. Method: The sample includes 1,680 youth aged 12 to 17 from the National Survey of Children’s Exposure to Violence (NatSCEV), a nationally representative telephone survey of victimization experiences. Results: Every victim of physical TDV (100%) reported at least one other type of vi...

Journal: :journal of sciences, islamic republic of iran 2013
m. moazzen

u-pb ages obtained on zircons from the investigated migmatites place new constraints on the evolution of the crustal rocks in the takab area. shrimp u-pb dating of inherited zircon in the melanosome parts of mafic migmatites from the takab complex gives a discordant age with an upper intercept of 2961±72 ma (mswd=0.5) and a lower intercept of 24.2±5.7 ma (mswd=1.7). in the concordia diagram, th...

2007
David T. Ho Peter Schlosser

Sulfur hexafluoride (SF6) has the potential to be a valuable transient racer for dating of young ground water. However, near urban areas, there are typically numerous point sources of SF6 which have a significant impact on the temporal evolution of its atmospheric mixing ratio, thereby complicating its use as an age-dating tool. Here, we present and discuss a 12-month record of atmospheric SF6 ...

Journal: :American journal of public health 2013
Heather L McCauley Daniel J Tancredi Jay G Silverman Michele R Decker S Bryn Austin Marie C McCormick Maria Catrina Virata Elizabeth Miller

OBJECTIVES We assessed the relationship between gender attitudes, identified as a critical component of violence prevention, and abuse toward dating partners among adolescent male athletes. METHODS Our sample comprised 1699 athletes from 16 high schools in northern California who were surveyed between December 2009 and October 2010 in the larger Coaching Boys Into Men trial. We used logistic ...

Journal: :Journal of the American Academy of Child and Adolescent Psychiatry 2008
Kate B Wolitzky-Taylor Kenneth J Ruggiero Carla Kmett Danielson Heidi S Resnick Rochelle F Hanson Daniel W Smith Benjamin E Saunders Dean G Kilpatrick

OBJECTIVE Dating violence is an important but understudied public health concern in adolescents. This study sought to examine the lifetime prevalence of serious forms of dating violence in 12- to 17- year-olds, risk and protective factors associated with dating violence, and the relation between dating violence and mental health. METHOD A nationally representative sample of adolescents (N = 3...

Journal: :Computers in Human Behavior 2015
Chris Clemens David Atkin Archana Krishnan

Online dating sites (ODSs) have become popular with users trying to find partners. The purpose of this study was to determine the role that biological and personality traits play in the use of online dating websites. A cross sectional survey with 678 participants—including cohorts from college as well as the general population—provided data for this study. The Five Factor Model personality mode...

2004
Jörg Polzehl Vladimir Spokoiny

The paper develops a non-parametric, non-stationary framework for business-cycle dating based on an innovative statistical methodology known as Adaptive Weights Smoothing (AWS). The methodology is used both for the study of the individual macroeconomic time series relevant to the dating of the business cycle as well as for the estimation of their joint dynamic. Since the business cycle is defin...

2015
Mohini Singh Margaret Jackson

Online dating sites are a new lucrative B2C e-business model, however, these sites are increasingly used by felons and scammers to exploit vulnerable customers. Although the impact of online dating scams on victims is vast, and online dating sites are a growing e-business, research on this topic is almost non-existent. The few studies on online dating sites are generally from Psychology address...

Journal: :Violence against women 2008
Beverly M Black Richard M Tolman Michelle Callahan Daniel G Saunders Arlene N Weisz

This study examined factors that influence help-seeking among a diverse sample of adolescents who experienced dating violence. A sample of 57 high school students in an urban community reported on the prevalence and characteristics of dating violence in their relationships. Someone observing a dating violence incident and a survivor's attaching an emotional meaning to the event significantly in...

Journal: :Journal of aging studies 2013
Deborah Carr Kathrin Boerner

In Widowhood in an American City (1973), Helena Lopata observed that widows struggle with new romantic relationships because their children often are resentful toward these new partners. Since the publication of Lopata's classic work, however, few studies have explored empirically the ways that widow(er)'s dating affects their relationships with children. We use prospective data from the Changi...

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