Hate Crime Offenders: An Expanded Typology

Little research has been conducted to determine the motivations of hate crime offenders. This article builds on an earlier work of J. Levin and McDevitt (1993) in which a typology of offender motivations was first articulated. We reanalyze 169 Boston police case files that were originally studied in order to provide empirical grounding for the typology. In this updated study, characteristics of the three original motives—thrill, defensive, and mission—are examined in relation to a new category: retaliatory motivation. In addition, the article addresses the issue of levels of culpability in explaining the most appropriate sanctions for certain kinds of hate offenders.     

Separating online scheduling algorithms with the relative worst order ratio

The relative worst order ratio is a measure for the quality of online algorithms. Unlike the competitive ratio, it compares algorithms directly without involving an optimal offline algorithm. The measure has been successfully applied to problems like paging and bin packing. In this paper, we apply it to machine scheduling. We show that for preemptive scheduling, the measure separates multiple pairs of algorithms which have the same competitive ratios; with the relative worst order ratio, the algorithm which is “intuitively better” is also provably better. Moreover, we show one such example for non-preemptive scheduling.     

The Interface Between Ethnic and Social System Attachment: The Differential Effects of Hierarchy-Enhancing and Hierarchy-Attenuating Environments

Social dominance theory distinguishes between hierarchy-enhancing environments, which promote inequality between groups (e.g., American society), and hierarchy-attenuating environments, which promote equality between groups (e.g., universities). Consistent with predictions derived from this distinction, a panel study that assessed attitudes prior to university exposure and after one year of university exposure yielded three findings: (1) exposure to the university decreased antiegalitarian attitudes; (2) at the end of their first year of college, European Americans exhibited greater national attachment than Asian Americans, Latinos, and African Americans, but members of all groups exhibited similar levels of university attachment; and (3) European Americans exhibited a more positive association between ethnic attachment and national attachment than members of the other three groups, but members of all groups exhibited similar relationships between ethnic attachment and university attachment.     

The hierarchical model for load balancing on two machines

Following previous work, we consider the hierarchical load balancing model on two machines of possibly different speeds. We first focus on maximizing the minimum machine load and show that no competitive algorithm exists for this problem. We overcome this barrier in two ways, both related to previously known models. The first one is fractional assignment, where each job can be arbitrarily split between the machines. The second one is a semi-online model where the sum of jobs is known in advance. We design algorithms of best possible competitive ratios for both these cases. Furthermore, we show that the combination of the two models leads to the existence of an optimal algorithm (i.e., an algorithm of competitive ratio 1). This algorithm is clearly optimal for the makespan minimization problem as well. For the latter problem, we consider the fractional assignment model and design an algorithm of best possible competitive ratio for it. This work was submitted as the M.Sc. thesis of the first author.     

Building the San Francisco Beacons

San Francisco's Beacon Initiative is designed to foster youth development on a large scale. Its intermediary, Community Network for Youth Development, used a theory of change process to forge consensus and create a road map to guide this large collaborative toward its long-term goals.     

"A person to talk to who really cared": high-risk mothers' evaluations of services in an intensive intervention research program

After one to four years of participation in an intensive NIMH intervention project, 30 mothers selected because of extreme high risk for difficulties in parenting gave ratings regarding changes they had made in their lives and the services they were offered. They felt that their lives had changes markedly and ranked the caring relationship with the staff clinicians and abstract rather than concrete services as most important. Training and policy implications are discussed.