Preliminary Evaluation of the Validity and Reliability of the Spanish Version of the Therapeutic Alliance with Clinician (TAC) Questionnaire

As part of a broader study aimed at evaluating perceived alliance with service providers and level of satisfaction with services received, 103 monolingual Spanish speaking Hispanic women were interviewed. Participants were receiving ongoing behavioral health treatment at three different community service provider sites located in the greater New Haven area in Connecticut. These sites included a community health center (n = 40), a community behavioral health center (n = 40), and a faith-based agency (n = 23). As part of this study, the English version of the Therapeutic Alliance with Clinician (TAC) questionnaire was translated into Spanish and administered to our sample of Hispanic women. Results on the psychometric properties of the Spanish version of the TAC are presented in this article.     

Population and resources

Rapid growth of the world's population is recent. World food production has increased in close proportion. No one can say when or in what fashion population growth will end; whether by our deliberate choice, or by catastrophe, or by some limit of the Earth.In the United States, during a century and a half of rapid growth, farming has diminished from being the major economic activity to an almost trivial fraction. At the same time, farm production has increased many-fold. One result is that the American public spends a smaller portion of its income on food than, probably, has any society in human history. Not all of the world has shared in this agricultural revolution and, once in recent decades, and now again, evidence suggests food production may fail to increase with population. Certainly no guarantee can be offered that food production will always be adequate.Pessimism on the outcome is warranted if only because of profound disagreement among those who should be best informed. Many look only to the near future and persistently advocate growth. Only a few look to the long-run and the inescapable disasters of persistent growth.Presented at the symposium on Population and Scarcity: The Forgotten Dimensions.     

Impact of developmental variance on behavior of models for insect populations II. Models for populations with density dependent restrictions on growth

Summary The impact of variation in developmental times on behavior of models for insect populations is investigated with special reference to models which include various types of intraspecific competition. At low densities, increases in developmental variation led to decreases in reproductive rate. At high densities, increases in developmental variation led to increases in reproductive rate. There was little change in the relationship between developmental variance and generation time as density increased.     

Measuring natural resource scarcity

One fundamental index of world social welfare is the availability of natural resources relative to population. In recent years, social, policy, and even physical scientists have been unable to reach consensus on whether natural resources are becoming increasingly scarce. The prevailing pessimistic view of the 1970s has been strongly challenged in the 1980s by resource-population optimists such as Julian Simon. In this paper, we argue that one source of failure to reach consensus is the fundamental ambiguity of available measures of natural resource scarcity. Surveying measures such as unit extraction cost, relative price, and the reserves-to-production ratio, we discuss difficulties of interpretation. Some of the problems identified may yield to further research, but others appear irremediable.     

A survey of recent research on race and residential location

This article reviews the post-1975 theoretical and empirical research on race and residential location in metropolitan areas of the United States. We interrelate the main themes of recent research, focusing on the causes and consequences of racial residential segregation. Racial prejudice and discrimination, black suburbanization, school segregation, labor market discrimination, and city/surburban environmental differentials are among the issues examined.     

Integrated scheduling and inventory management of an oil products distribution system

The oil supply chain is facing new challenges due to emerging issues such as new alternative energy sources, oil sources scarcity, and price variability with high impact on demand and production and profit margins reduction. Additionally, the existence of large, complex and world wide spread businesses implies a complex system to be managed where distribution can be seen as one of the key areas that needs to be efficiently and effectively managed. Different types of distribution modes characterize the oil supply chain where the pipeline mode is one of the most complex to operate when having multiproduct characteristics. This paper addresses the planning of a generic oil derivatives transportation system characterized by a multiproduct pipeline that connects a single refinery to a storage tank farm. Two alternative mixed integer linear programming models (MILP) that aim to attain a set of planning objectives such as fulfilling costumers’ demands (which is mandatory) while minimizing the medium flow rate are developed. Additionally, final inventory levels are avoided to be excessively low. A real world scenario of a Portuguese company is used to validate and compare the two alternative MILP models developed in this paper.     

The impact of timely information on organisational performance in a supply chain

Information produced by ERP systems is termed JIT-information, since it is provided at the right time in the right place with a minimum of waste. The JIT-information construct is defined and described and a measurement scale is developed. A JIT-information performance model is proposed and assessed using a structural equation modelling methodology. The results indicate that the model fits the data well: (1) supply chain management strategy positively impacts JIT-information, (2) JIT-information directly impacts both logistics and organisational performance, and (3) logistics performance directly impacts organisational performance.