‘Now I See The Difference’ — The Use Of Visual News Of Difference In Clinical Practice

Differences between events, values, attitudes and relationships provide therapists with the most meaningful data in the search for a circular perspective. Systems change is believed to be dependent on the reception of relevant information by the system. Traditionally, information has been collected verbally and Tomm (1984) outlines a schema of the types of difference questions. However, clinical practice suggests that these questions are not suitable to all clients. Difference questions may be confusing and unproductive when working with young children whose language skills are not fully developed and auditory memory limited. Adults whose verbal skills are limited or whose primary mode for processing information is not auditory, also have difficulty. An alternative visual method for collecting news of difference is proposed, using Tomm's (1984) categories as a basis. Case examples are given of this technique, at the stage of data collection and as a way of marking and reinforcing change through the course of therapy.     

Are We Thinking Straight? The Politics of Straightness in a Lesbian and Gay Social Movement Organization

Daniel Cortese's book, ‘Are we thinking straight: Thepolitics of straightness in a lesbian and gay social movementorganization’ examines the political strategies of theUSA organization, the Straight and Gay Alliance (SAGA), andits efforts to promote ‘safe schools’ for lesbian,gay, bisexual and trans youth (LGBT). The book's main focusis on how SAGA deploys the involvement of ‘straight’or heterosexually-identified individuals as part of SAGA's publicpolitical agenda. As a national organization with numerous localchapters across the United States, SAGA encourages parents,teachers and students to work together to ensure that schoolsactively protect LGBT students from homophobic     

Infant Contingency/Extinction Performance After Observing Partial Reinforcement

Social information gathering by infants 6 and 12 months old was examined as a foundation for later social learning that may be uniquely human. Infant performance on a contingency/extinction task was studied following a caregiver demonstration of the contingency on varied reinforcement schedules. Infants who observed caregivers receive any reinforcing stimulation in pretraining decreased responding over their own acquisition period, possibly because they began to habituate to the reinforcer. In extinction, infants who observed caregivers receive partial reinforcement in pretraining were more persistent in responding than others. This suggested that direct experience with partial reinforcement is not needed for greater persistence in extinction. These studies revealed details of social learning in the 1st year.     

Political Incorporation Among Immigrants from Ten Areas of Origin: The Persistence of Source Country Effects

Using four years of data from the Current Population Survey, this study examines the effect of country of origin on two types of political incorporation among immigrants ‐ citizenship and voting ‐ in the contemporary United States. Results show that country of origin is a statistically significant predictor of citizenship acquisition for nine of ten immigrant groups and for voter turnout for five of ten groups, net of income, education, length of residence in the United States, and other demographic characteristics. The findings also suggest that country of origin matters as much for how it interacts with other key characteristics, such as education and income, as for the independent influence it exerts on these two political processes. For immigrants from most countries under examination, lower levels of education and income discourage citizenship acquisition. An exception is found among Britons, for whom lower levels of income encourages naturalizing. In the voting process, higher levels of education encourage voter turnout for most immigrant groups. Though country of origin has a greater effect on naturalizing than on voting, it significantly impacts both types of political incorporation. The differing effects of country of origin and other demographic factors on naturalizing and voting, respectively, suggest the two processes are distinct from one another.     

Compressed Natural Gas Bus Safety: A Quantitative Risk Assessment

This study assesses the fire safety risks associated with compressed natural gas (CNG) vehicle systems, comprising primarily a typical school bus and supporting fuel infrastructure. The study determines the sensitivity of the results to variations in component failure rates and consequences of fire events. The components and subsystems that contribute most to fire safety risk are determined. Finally, the results are compared to fire risks of the present generation of diesel-fueled school buses. Direct computation of the safety risks associated with diesel-powered vehicles is possible because these are mature technologies for which historical performance data are available. Because of limited experience, fatal accident data for CNG bus fleets are minimal. Therefore, this study uses the probabilistic risk assessment (PRA) approach to model and predict fire safety risk of CNG buses. Generic failure data, engineering judgments, and assumptions are used in this study. This study predicts the mean fire fatality risk for typical CNG buses as approximately 0.23 fatalities per 100-million miles for all people involved, including bus passengers. The study estimates mean values of 0.16 fatalities per 100-million miles for bus passengers only. Based on historical data, diesel school bus mean fire fatality risk is 0.091 and 0.0007 per 100-million miles for all people and bus passengers, respectively. One can therefore conclude that CNG buses are more prone to fire fatality risk by 2.5 times that of diesel buses, with the bus passengers being more at risk by over two orders of magnitude. The study estimates a mean fire risk frequency of 2.2 x 10(-5) fatalities/bus per year. The 5% and 95% uncertainty bounds are 9.1 x 10(-6) and 4.0 x 10(-5), respectively. The risk result was found to be affected most by failure rates of pressure relief valves, CNG cylinders, and fuel piping.     

Consideration of Background Exposures in the Management of Hazardous Waste Sites: A New Approach to Risk Assessment

The current approach to health risk assessment of toxic waste sites in the U.S. may lead to considerable expenditure of resources without any meaningful reduction in population exposure. Risk assessment methods used generally ignore background exposures and consider only incremental risk estimates for maximally exposed individuals. Such risk estimates do not address true public health risks to which background exposures also contribute. The purpose of this paper is to recommend a new approach to risk assessment and risk management concerning toxic waste sites. Under this new approach, which we have called public health risk assessment, chemical substances would be classified into a level of concern based on the potential health risks associated with typical national and regional background exposures. Site assessment would then be based on the level of concern for the particular pollutants involved and the potential contribution of site contaminants to typical background human exposures. While various problems can be foreseen with this approach, the key advantage is that resources would be allocated to reduce the most important sources of human exposure, and site remediation decisions could be simplified by focussing on exposure assessment rather than questionable risk extrapolations.