Recommended Distributions for Exposure Factors Frequently Used in Health Risk Assessment

Although there has been nearly complete agreement in the scientific community that Monte Carlo techniques represent a significant improvement in the exposure assessment process, virtually all state and federal risk assessments still rely on the traditional point estimate approach. One of the rate-determining steps to a timely implementation of Monte Carlo techniques to regulatory decision making is the development of "standard" data distributions that are considered applicable to any setting. For many exposure variables, there is no need to wait any longer to adopt Monte Carlo techniques into regulatory policy since there is a wealth of data from which a robust distribution can be developed and ample evidence to indicate that the variable is not significantly influenced by site-specific conditions. In this paper, we propose several distributions that can be considered standard and customary for most settings. Age-specific distributions for soil ingestion rates, inhalation rates, body weights, skin surface area, tapwater and fish consumption, residential occupancy and occupational tenure, and soil-on-skin adherence were developed. For each distribution offered in this paper, we discuss the adequacy of the database, derivation of the distribution, and applicability of the distribution to various settings and conditions.     

Knowledge-based systems: A qualitative formalism

This paper examines knowledge-based systems (KBS's) and considers how they may be applied in the social sciences. KBS's are programs which use artificial intelligence techniques to solve complex problems. Characteristics of KBS's are illustrated with an example knowledge-based program (N-ACT) written in PROLOG which uses Goffman's dramaturgical model to analyze social interaction. The paper argues that KBS's offer a qualitative formalism capable of being applied to concepts and phenomena which have been beyond the scope of traditional mathematical models. KBS's can create explicit, reproducible, logically powerful knowledge systems while avoiding the Procrustean bed of mathematical formalism.This research took place in part while the author was on sabbatical leave from the University of Missouri and a post-doctorate fellow in medical computing and informatics on NIH Grant LM 07006 from the National Library of Medicine. The author would like to thank Peter H. Hall and two anonymous reviewers for their helpful comments on earlier drafts.     

The Effect of Negative and Positive Childhood Divorce Experiences on Professional Performers

The purpose of this study was to provide an in-depth analysis of divorce by comparing levels of depression, anxiety, self-esteem, and availability of resources between professional performers who were children from divorces considered negative, divorces considered positive or neutral, and professional performers raised in 2-parent households. The results of this study indicated that performers raised in divorced families reported more depression, more anxiety, and lower levels of self-esteem than those who were raised in intact families. Additionally, results indicated that those who were raised in neutral to positive divorced families reported less depression, less anxiety, and higher levels of self-esteem than did those stemming from negatively divorced families. Implications for treatment and directions for future research are presented.     

Does ‘the China Option’ influence subsidiary technology sourcing strategy?

We draw on transaction cost economics and the technology innovation management literature to advance a contextual model of the link between the perceived influence of China on technology strategy and MNC subsidiary sourcing strategy. In particular, we hypothesize that the relationship between a perceived influence of China on technology strategy and MNC subsidiary process technology sourcing strategy is moderated by the innovation context. Here, we consider the innovation context to be externally represented by the appropriability regime and dominant design, while internally it is measured by the subsidiary's level of complementary assets. We test our predictions on a multi-industry sample of 111 MNC subsidiaries from the Association of Equipment Manufacturers. We find support for the moderating influence of the innovation contexts of appropriability regime and complementary assets.     

NGOS AND THE DEVELOPMENT OF CIVIL SOCIETY IN BULGARIA AND THE USA

This study examines the development of civil society and its ability to facilitate stronger democratic practices in Bulgaria using the USA as a comparison. Using data gathered from surveys of NGOs in 2006, we examine three sets of questions. First, what is the level of NGO organizational capacity? Second, to what degree are NGOs performing their mediating roles? Third, how do NGOs perceive their effectiveness in working with the state and its citizens. Our findings suggest that Bulgarian NGOs face a number of challenges when compared with US NGOs, which affect their ability to engage in civil society activities such as establishing horizontal ties with citizens and other groups.     

Determinants of residential Firewise behaviors in Central Oregon

As a result of climate change and past management practices, wildfires are becoming larger and occurring more frequently than ever before in the Western U.S. In order to mitigate the effects of this growing threat, fire management agencies such as the U.S. Forest Service have encouraged residents in at-risk communities to protect their homes, property and communities by adopting Firewise recommendations. Using annual random sample household surveys conducted in fire-prone central Oregon from 2011 to 2013, this study examines the impact of wildfire events (i.e., wildfire exposure and evacuation), risk perception, wildfire plan informedness, proximity to wildlands, and various demographic factors on resident Firewise behavior participation. Findings indicate that residents who have experienced a wildfire event, who are familiar with their county’s Community Wildfire Protection Plan, who perceive wildfire risk to their community, and who live in proximity or within a wildland area, were significantly more likely to engage in Firewise behaviors than those residents without these experiences, orientations or household locations.     

Associations Between Friendship,Sympathy, and Prosocial Behavior Toward Friends

The current study examined the associations between multiple aspects of the friend relationship (connection, companionship, psychological control) and global prosocial behavior toward friends. Participants included 467 early adolescents (M age of child = 13.32, SD = 1.05, 49% female, 69% European American), and data were collected at two time points, roughly 1 year apart. Structural equation modeling suggested that friend psychological control was negatively associated with prosocial behavior toward friends, while friend connection was positively associated (via adolescent sympathy). Discussion focuses on the friend relationship as an important influence on adolescent sympathy and prosocial behavior toward friends.     

Interdisciplinary staff perceptions of an occupational therapy return to work program for people living with AIDS

The purpose of this qualitative study was to identify the perception of interdisciplinary staff members regarding the impact of a model work and independent living oriented program for residents in supportive living facilities. This study used focus groups and individual interviews to collect these perceptions. Staff members identified four areas of impact: utilization of a holistic and process-oriented approach, an ability to identify and work with the strengths of clients, emphasis on the learning of practical skills, and creating an intersection for all aspects of services. These findings point to the fact that staff members found the value that occupational therapy has to offer their overall programming by improving participation of clients with HIV in learning practical skills for use in their daily lives and in developing work related skills.