An optimal search procedure

Consider the following problem. There are exactly two defective (unknown) elements in the set X={x₁, x₂,…,x_n}, all possibilities occuring with equal probabilities. We want to identify the unknown (defective) elements by testing some subsets A of X, and for each such set A determining whether A contains any of them. The test on an individual subset A informs us that either all elements of the tested set A are good, or that at least one of them is defective (but we do not know which ones or how many). A set containing at least one defective element is said to be defective. Our aim is to minimize the maximal number of tests. For the optimal strategy, let the maximal test length be denoted by l₂(n). We obtain the value of this function for an infinite sequence of values of n.     

Is tolerance to shiftwork predictable from individual difference measures?

Abstract

This study was aimed at evaluating the most important relations between individual characteristics of shiftworkers and their subjective health complaints, obtained by cross-sectional and longitudinal procedures. A total of 604 shiftworkers and 185 young subjects who were going to enter shiftwork were examined by means of individual difference and subjective health questionnaires. The questionnaires were administered concurrently to the group of workers already involved in shiftwork. In the other group studied, the questionnaires were administered before they entered shiftwork, and subjective health was re-examined after the first and third year of work on shifts. More health complaints were reported by the group of older workers and those with longer shiftwork experience, with higher scores of neuroticism, hard-driving and competitiveness, speed and impatience, and rigidity of sleeping habits, and lower scores on relaxedness, efficiency and vigorousness. However, the correlations between these dimensions, when taken before entering shiftwork, and subjective health complaints obtained after a few years working on shifts were small or absent, indicating low validity of the individual difference measures for predicting subsequent health problems in shiftworkers.     

Proceedings of the Fifty-Eighth Annual Meeting of the American College Health Association San Diego,California, 1980

Abstract

Objective: The objective of this study was to assess dietary intakes and eating habits of female college athletes and compared them with the minimum sports nutrition standards. Participants: Data were obtained from 52 female college athletes from a National Collegiate Athletic Association (NCAA) Division I university between January 2009 and May 2010. Methods: Participants completed anthropometric measurements and dietary assessment using a 3-day food record, a 24-hour recall, and a nutrition questionnaire. Results: t tests indicated the energy and carbohydrate intakes were below the minimum recommended amount (p < .001), with only 9% of the participants meeting their energy needs. Seventy-five percent of the participants failed to consume the minimum amount of carbohydrates that is required to support training. The majority of the participants reported no regular breakfast, 36% consumed < 5 meals/day, and only 16% monitored their hydration status. Conclusions: Effective nutrition interventions are needed to improve dietary intakes and eating habits of female college athletes.     

Gendering the Bone: The Politics of Memory in Bosnia and Herzegovina1

This article explores and intervenes in the deadlock produced by the identifications of bodily remains resulting from genocide in Bosnia and Herzegovina. Every day, in that country, bodily remains are exhumed, counted, reassociated, managed and consecrated as ethnic remains. This is done through the strategic collaboration of forensic science; multiculturalist post‐conflict management, with its politics of reconciliation; and religious ritual — an uncouth alliance between the scientist, the bureaucrat and the priest. In doing so, the scientist, the bureaucrat and the priest assume the perspective of the perpetrator of the crime. For it is in the fantasy of the perpetrator that the executed person is an ethnic other. The article intervenes by posing the question: what different praxis could deactivate the reification of bones as ethnic victims, would stop the prolongation of the injurious gaze of the perpetrator and would return the bones to common use through which we can contemplate hope after genocide? In other words, what is the politics that will enable us to be hopeful subjects in relation to these bones? Drawing on cultural production in Bosnia and Herzegovina, the article both challenges and goes beyond current mainstream political choices. Thus, it identifies and strengthens hopeful politics in cultural‐as‐political practices that productively bear witness to the precariousness of life. In Bosnia and Herzegovina, it is mainly women artists who harness traumatic events and the loss of the past and present in order to announce a more hopeful politics. What this hopeful politics after genocide is, through what praxis is it enacted, and by which subjects are the main concerns of this article.     

Could Refugees Have a Significant Impact on the Future Demographic Change of Serbia?

Serbia still hosts the largest number of forced migrants in Europe. The paper examines the impact of the refugee influx from newly formed states on the territory of the Socialist Federal Republic of Yugoslavia (SFRY) into Serbia on the future demographic trends of the country. Examination of the past population projections of Serbia confirmed that the process of predicting migration flows is related to the greatest source of uncertainty compared to all other components of demographic change. The results of our projection of Serbia’s population through 2050 show that the large influx of refugees during the last decade of the 20th century should not have a significant impact on the future demographic change of Serbia. Even in the case of substantial improvement of total fertility rate (2.35 in final projection year, comparing to current 1.55), no positive demographic effect should be experienced. Continuation of the decline in Serbia’s total population size cannot be offset by recent refugee influx for several reasons. The most important of them are: too small number of migrants comparing to the total population size of Serbia; similarity in fertility behaviour between refugee and indigenous population; the large‐scaled emigration during the same period; much older refugee population compared to emigrant population; and the processes of refugee repatriation and resettlement. A purely hypothetical projection variant assuming the migration required to maintain the size of current total population size of Serbia until 2050 points out the need for almost three times the amount of average annual migration surplus caused by the refugee influx.     

Serb Returnees in Croatia – the Question of Return Sustainability1

The authors report on representative field research dealing with ethnic Serb returnees to Croatia. The total sample consisted of 1,500 randomly chosen persons from a population of 120,000 officially registered Serb returnees to Croatia. The main questionnaire was answered by 403 respondents. Drawing on references relating to the concept of sustainability, they further develop it through differentiation of seven sustainability aspects or dimensions: safety; socio‐demographic structure of returnees; socio‐economic conditions of return; refugee experiences; citizenship and minority rights; and subjective perceptions of sustainability. According to field findings, between 35 and 45 per cent of the registered returnees reside permanently at the addresses they reported upon return, and an additional 3,5 per cent moved to other locations within Croatia. At the same time, between 35 and 42 per cent actually reside in their refugee countries (mostly in Serbia and Bosnia and Herzegovina). Some 6 per cent of returnees occasionally stay in Croatia and occasionally outside of it. The interviewers were unable to get any reliable information regarding permanent stay for 15 per cent of the people from the sample. Finally, 11 per cent of them have, in the meantime, passed away since registered return started in 1996. The research results confirm the prevailing impression that Serb returnees are predominantly old people. The average age of all interviewed family members is around 51. The findings and conceptualization suggest the need for a differentiated approach to a returnee body to better understand the complexity of a return. First, we have to distinguish among refugees potential returnees from non‐returnees (political and economic ones). Returnees themselves can then be grouped into several types: I) unconditional permanent; II) conditional permanent; III) semi‐returnees or trans‐national; IV) non‐formal and V) formal or quasi‐returnees.