The simulation of industrial robot systems

This paper describes the GRASP computer aided design system for modelling and evaluating industrial robot workplaces. GRASP satisfies a range of simulation needs within the context of designing, implementing and operating industrial robotic systems. The GRASP software may be used to investigate robots operating by themselves or, more likely, as part of an integrated cell. Facilities within GRASP assist workplace layout, position and velocity evaluations, clash detection and co-ordination between items. A robot library exists and is being extended, and an embryo off-line programming facility has been used under restricted conditions. GRASP has been used to help solve a wide range of practical industrial robot problems and has proved itself technically, and also as an educational tool, by showing how a proposed system would operate. The paper describes the facilities within GRASP.     

How do we capture 15 years of complex and meaningful data about young people's lives?

Abstract

This paper describes the development of a method of data collection, which captures the complexity of living situations, family dynamics and key life events of teenagers. This ‘Life History Calendar’ was adapted from earlier life history calendar methods for a multidisciplinary intergenerational study. The new calendar is able to record details of 15 years of teenage participants’ lives and can be administered to teenagers and their parents to show changes over individual lives and difference between individuals in a cohort. Referring to some preliminary data, we show that the calendar is a practical and effective method of data collection, which will be useful to researchers and practitioners working with young people and their families.     

Why Does Involvement in Voluntary Associations Promote Trust? Examining the Role of Network Diversity

Scholars argue that trust is fundamental to maintaining a healthy society, and consequently, recent evidence that trust may be declining in the United States has generated an interest in the determinants of trust. According to the social capital literature, particularly the work of Robert Putnam, involvement in voluntary associations influences the development of generalized trust. One way in which organizational participation is thought to foster trust is through creating more diverse, or bridging, social networks. However, scarcely any research has empirically examined this mechanism. Using data from the Social Capital Community Benchmark Survey, I test whether network diversity (ties to persons from different social backgrounds) accounts for some of the influence of organizational involvement on trust. The results suggest that the influence of involvement in multiple associations on trust is largely mediated by its influence on network diversity. In addition, while recent research observes that some predictors of trust vary by race and ethnicity, I find no differences in these relationships across non‐Hispanic white, African American, and Latino respondents.     

RELIGIOUS INVOLVEMENT AND EDUCATIONAL OUTCOMES: The Role of Social Capital and Extracurricular Participation

Previous research has observed that religious participation is positively related to a wide variety of adolescent outcomes, including academic achievement, but relatively little is known about why this is the case. We focus on a group of related potential explanations for why religious involvement improves educational outcomes. We examine whether religious participation enhances academic outcomes among teens by the way in which it shapes their social ties, or social capital, focusing on both intergenerational relationships and on relationships with peers. We also examine the potential intervening role of extracurricular participation. Using structural equation models to analyze data from the National Longitudinal Study of Adolescent Health (Add Health), we examine the potential role of social capital and extracurricular participation in mediating the relationship between religious participation and academic achievement, dropping out of high school, and attachment to school. We find that religious attendance promotes higher intergenerational closure, friendship networks with higher educational resources and norms, and extracurricular participation. These intervening variables account for a small part of the influence of adolescent religious participation on the educational outcomes in this study.     

The association of smoking with drinking pattern may provide opportunities to reduce smoking among students

There is evidence that smoking and alcohol consumption are paired behaviours among university students, but we know little about how New Zealand students engage in these behaviours. We estimated prevalence of daily and occasional smoking among university students, and associations of smoking with drinking patterns, demographics and smokefree policies of the university. This research was conducted with 2822 university students, aged 17–25, from five New Zealand universities who participated in an online health survey in 2013. Fourteen percent reported they currently smoke occasionally, and 3% reported smoking on a daily basis. Increasing age, living situation, drinking more often, and drinking more alcohol during drinking occasions were all associated with greater levels of smoking. Understanding patterns of smoking in relation to alcohol consumption may help efforts to further reduce smoking prevalence. Specifically, policy makers should consider approaches that de-couple tobacco and alcohol consumption, such as expanding the smokefree perimeter of bars and disallowing the sale of tobacco at premises licensed to sell alcohol.     

Voluntary Associations and Social Network Structure: Why Organizational Location and Type Are Important

Sociological Forum - Are voluntary associations integrative forces in our society because they promote diverse social ties, or do they primarily promote ties between socially similar people? The...     

Socio-economic status, permanent income, and fertility: a latent-variable approach

This paper examines how permanent income and other components of socio-economic status (SES) are related to fertility in less developed countries. Because permanent income cannot be measured directly, we employ a latent-variable method. We compare our results with those of the more common proxy-variable method and investigate the consequences of not accounting for measurement error. Using data from Ghana and Peru, we find that permanent income has a large, negative influence on fertility and that research must take the latent nature of permanent income into account to uncover its influence. Controlling for measurement error in the proxies for permanent income can also lead to substantial changes in the estimated effects of control variables. Finally, we examine which of the common proxies for permanent income most closely capture the concept. The results have implications beyond this specific dependent variable, providing evidence on the sensitivity of microanalyses to the treatment of long-term economic status.     

The dynamic,complex and diverse living and care arrangements of young New Zealanders: implications for policy

The living arrangements of young people in New Zealand are diverse and often complex. In this article we report the range of care and living arrangements of 209 15-year-old New Zealanders, 47 of whom identified as Māori. These young people were participants in the second generation of a cohort study. Data were collected from their parents via a life history calendar and analysed for variety and consistency of care arrangements, household membership and transitions. Few participants had a consistent pattern of parental care arrangements and most had experienced multiple changes in household composition and frequent changes of address. We conclude that the whānau/family lives of many young New Zealanders are complex and dynamic. These observations contrast with the conventional notions of family life that form the basis for New Zealand’s family policies. We argue that social policies and services impacting on young people need to reflect the lived reality of young people if they are to meet young people’s needs.     

Economic status proxies in studies of fertility in developing countries: Does the measure matter?

This paper investigates the consequences of using different economic status proxies on the estimated impact of economic status and other determinants of fertility. Using micro survey data from Ghana and Peru, we find that the proxies for income that best predict fertility are a principal components score of the ownership of consumer durable goods and a simple sum of ownership of these durable goods. Furthermore, the choice of the proxy generally has a minor influence on the predicted effects of the control variables. We compare the results from using a restricted set of proxies, such as those available in the Demographic and Health Surveys, with the results obtained using a lengthier set of proxies. Our results suggest implications beyond fertility analyses by providing researchers with an awareness of the sensitivity of microanalyses to the treatment of economic status. Our results also suggest practical recommendations for the collection of survey data.