A spanning heuristic for the unordered and ordered matching identification problem

The matching identification problem (MIP) is a combinatoric search problem related to the fields of learning from examples, boolean functions, and knowledge acquisition. The MIP involves identifying a single “goal” item from a large set of items. Because there is commonly a cost associated with evaluating each guess, the goal item should be identified in as few guesses as possible. As in most search problems, the items have a similar structure, which allows an evaluation of each guessed item. In other words, each guessed item elicits partial information about the goal item, i.e. how similar the guess is to the goal. With this information the goal is more quickly identified.The unordered MIP has been studied by Mehrez and Steinberg (ORSA J. Comput. 7 (1995) 211) in which they proposed two different types of algorithms. The purpose of the present paper is to suggest an improved Spanning Heuristic algorithm. Its improvement increases as the problem size increases. Further results and comparisons are derived for the unordered and ordered cases.This research shows that when the search space is very large, it is better to inquire from items that are known not to be the goal (they have been ruled out by previous guesses), for the purpose of acquiring more information about the goal. As the search space is narrowed, it is better to guess items that have not been ruled out.     

Longitudinal Links between Adolescent and Peer Conduct Problems and Moderation by a Sensitivity Genetic Index

The most extensively studied influence on adolescent conduct problem behaviors is peers, and the literature points to genetics as one source of individual differences in peer influence. The purpose of this study was to test the hypothesis that an environmental sensitivity genetic index comprised of DRD4, 5‐HTTLPR, and GABRA2 variation would moderate the association between peer and adolescent conduct problems. Latent growth modeling was applied to PROSPER project longitudinal data from adolescents and their peers. Results showed the hypothesis was supported; adolescents with more copies of putative sensitivity alleles were more strongly influenced by their peers. The interaction form was consistent with differential susceptibility in follow‐up analyses. Strengths and weaknesses of genetic aggregates for sensitivity research are discussed.     

The racialized patterns of police violence: The critical importance of research as praxis

The tragic killing of George Floyd at the hands of the police resulted in hundreds of thousands of protestors marching in the streets demanding change. The call for change criticized the killing of Blacks by law enforcement and challenged White supremacy as an institution of social control and racial violence. A key component of the marches and protests was a message to the residents of the United States: “Black Lives Matter.” As society grapples with a reckoning, researchers studying police violence for the past 6 decades have been empirically and theoretically debating the reasons why use of force by law enforcement continues to have a higher proportion of Black and Brown victims compared to Whites. Although the research on fatal police killings was studied by only a small number of individuals prior to 2014, after the killing of Michael Brown in Ferguson, Missouri the research in different areas of the country increased rapidly as did the forms of analysis and research disciplines making their own contributions. The Washington Post and Guardian news agencies established that deaths at the hands of the police were occurring for at least 900 to 1100 individual deaths per year for which firearms resulted in the greatest cause of death. As US government agencies failed to produce a national data source on police involved killings, the media took a leading role in providing greater national understanding. The authors examine what role academic researchers contribute to the discussion for solutions, particularly those from marginalized backgrounds. As protestors march, lawyers sue and defend, and politicians create new forms of legislation, researchers need to play a more important role initiating critical studies, making sense of the data, and providing a theoretical framework for which police violence can be understood. This article will provide an overview of the literature on racialized police violence, point out key patterns involving racial and ethnic disparities, and emphasize how researchers can play a more important role in advocating for change.     

Where tradition and ‘modern’ knowledge meet: exploring two Islamic schools in Singapore and Britain

Muslims live in a ‘modern’ world where subjects such as the English language, mathematics, sciences, and information and communication technology (ICT) are highly valued and enthusiastically transmitted in schools. How some Islamic schools attempt to equip their students with ‘modern knowledge’ while remaining faithful to their religious traditions is the focus of this exploratory study. Using two Islamic schools in Singapore and Britain as illustrative case studies, this paper examines their history, aims, curriculum and pedagogy in their aspiration to acquire ‘modern’ knowledge within their Islamic world views. It further explores some common challenges faced by students and teachers in both schools in their quest for a balanced curriculum. By highlighting the Islamic schools in two Muslim minority countries, this paper aims to contribute towards the international literature on how religious schools assert their cultural heritage and negotiate their learning in the modern age.     

Trust and Estate Planning: The Emergence of a Profession and Its Contribution to Socioeconomic Inequality1

This article offers a new perspective on the connection between socioeconomic inequality and occupations by examining the impact of trust and estate planners on global wealth stratification. While many studies treat the professions as mirrors of inequalities in their environments, this article looks at the ways professionals participate in the creation of stratification regimes. Trust and estate planners do this by sheltering their clients' assets from taxation, thereby preserving private wealth for future generations. Using tools such as trusts, offshore banks, and shell corporations, these professionals keep a significant portion of the world’s private wealth beyond the reach of the state. Trust and estate planning thus contributes to creating and maintaining socioeconomic inequality on a global scale. The significance of the profession has grown as wealth itself has become more fungible, spurring innovation in legal, organizational, and financial strategies, and thwarting a myriad of laws and policies designed to limit enduring inequality in modern, democratic societies.     

Does generosity beget generosity? The relationships between transfer receipt and formal and informal volunteering

This paper examines whether receipt of public or private assistance is associated with recipients’ own generosity in the form of formal and informal volunteering. Using matched data from the 2007–2011 American Time Use Survey and the Annual Social and Economic Supplement to the Current Population Survey, this paper finds that receipt of private assistance from friends and relatives is negatively associated with the time women spend caring for non-household adults and the time men spend caring for non-household children. Receipt of public assistance is found to be negatively associated with men’s care of non-household adults. No associations are found between either type of assistance and time spent volunteering for a formal organization.     

Color codification: law,culture and the hue of communication

This paper explores the intersection between color, culture and the legal domain; it reveals how recent, and disturbing, developments in trademark law have allowed for corporate ownership of the powerful communicative media of color and discusses the implications of this (colorful) codification. Mapping the communication of color within our contemporary legal, political and social environment, the paper addresses how color's vibrant significatory power is hemmed in by law, by (legal) language and by corporations. Law, it is argued, stands as one of the primary and most powerful practical “tools” used to shape, standardize and contain contemporary communication – and currently laws governing trademark function to recode and constrain the presumably boundless media of color. This is troubling, since our colorful environment becomes simplified when the array of meanings attributed to a particular hue are narrowed and then granted legitimacy by the courts.     

Impact of interaction with a partner or friend on the exposure effects of pornography and erotica

Past studies on the effects of sexually explicit materials on women have tended to study them alone, in pairs, or in groups of strangers. By contrast, our study randomly assigned women to bring either a same-sex friend or a male partner to reflect more natural viewing conditions. Discussion between the participant and her companion followed exposure to the sexual images. Women who viewed pornography maintained their (quite high) level of negative mood, whereas women who viewed erotica experienced a substantial improvement in mood. The sex of the companion did not have a direct influence on participants' mood, with discussion improving mood across the board. However, participants' ratings of their satisfaction with the discussion were significantly influenced by the sex of their companion. We suggest that future research should focus more on the interpersonal aspects of male-female relationships when exploring the effects of sexually explicit materials on heterosexual women.