Estimating the Number of Block Boundaries from Diagonal Blockwise Matrices Without Penalization

In computational biology, numerous recent studies have been dedicated to the analysis of the chromatin structure within the cell by two‐dimensional segmentation methods. Motivated by this application, we consider the problem of retrieving the diagonal blocks in a matrix of observations. The theoretical properties of the least squares estimators of both the boundaries and the number of blocks are investigated. More precisely, the contribution of the paper is to establish the consistency of these estimators. A surprising consequence of our results is that, contrary to the one‐dimensional case, a penalty is not needed for retrieving the true number of diagonal blocks. Finally, the results are illustrated on synthetic data.     

Examining the Relationship Between Level of Participation in Community Gardens and their Multiple Functions

Participation in community gardens improves health and well-being; however, few studies examine how often individuals need to participate to achieve these outcomes. This study examined the relationship between levels of participation in community gardens and health behaviors, psychological well-being, and perceptions of the community by surveying regular, occasional, and noncommunity garden participants in a disadvantage neighborhood (N = 115). Regular and occasional participates reported better mental health; occasional participants reported more vegetable intake, and regular participants reported more sense of community. Therefore, community practitioners may need to consider level of participation in gardening activities for some outcomes and not others.     

Engaging Youth in Municipal Government: Moving Toward a Youth-Centric Practice

Youth councils are one mechanism to engage youth in community governance; yet, there is scant research to guide practice. This study examined the extent to which youth are engaged in the origin, structure, and activities of municipal youth councils. Interviews were conducted with 24 adult stakeholders involved in the operations of youth councils. Data were analyzed using thematic analysis. Results demonstrated that youth-centric practice builds upon theoretical frames of positive youth development, social justice, and civic engagement. Youth-centric practice consists of youth representation, leadership, initiative, and decision-making. Results can assist practitioners and policy makers in engaging youth in municipal government.     

Mobile transitions: a conceptual framework for researching a generation on the move

This paper argues for a renewed research agenda on the transnational mobility of young people across both youth studies and migration studies. We review key literature across these fields, before arguing for a new conceptual framework that helps to further extend the emerging interdisciplinary space of ‘youth mobility studies’ (Raffaetà, Baldassar and Harris 2016). Our central proposition is that mobility has become an important marker and maker of transitions for youth in many contexts globally. We argue that a conceptual advance is required to understand the unique circumstances of a generation ‘on the move’ as they navigate diverse and non-sequential social, civic and economic practices of ‘adulthood’, and propose the conceptual framework of mobile transitions as a timely new agenda. ‘Mobile transitions’ describes transition pathways under conditions of mobility but also emphasises two key claims around the further development of transnational youth mobility research. The first is the importance of an orientation towards spatio-temporal complexity, multiplicity and fragmentation of both ‘youth transition’ and ‘migrancy’ as scholarly concepts and lived experiences. The second is an argument for understanding ‘mobile transitions’ in relation to three intersecting domains – economic opportunities, social relations and civic practices – rather than through linear notions of the achievement of economic and social autonomy.     

Acting with the best of intentions… or not: A typology and model of impression management in leadership

Impression management (IM) is important for effective leadership. Followers accept influence from individuals who meet their perceptions of what it means to be a leader, and IM is an important way of impacting those perceptions. Yet, the extant literature on leader IM is fragmented. We unify the literature in this area by creating a multi-dimensional typology and multi-level model of IM in leadership. We examine the multi-dimensional nature of IM as a construct composed of information processing, communicative, and goal-directed components, thereby creating eight IM archetypes. Then, we examine how IM can be used to impact follower perceptions of the leader through the lenses of transformational/charismatic, authentic, and leader categorization theories. This research unites a currently fragmented area of research and sparks new questions about how leader behaviors can be used to influence followers toward multi-level leadership outcomes.     

Same-Sex Marriage and the Assimilationist Dilemma: A Research Agenda on Marriage Equality and the Future of LGBTQ Activism,Politics, Communities,and Identities

ABSTRACT

This special issue of the Journal of Homosexuality, examines the impact of the marriage equality movement and the resulting landmark U.S. Supreme Court decision, Obergefell v. Hodges (2015) that legalized same-sex marriage in the U.S., on lesbian, gay, bisexual, transgender, and queer (LGBTQ) activism, politics, communities, and identities. The articles in this issue examine the complicated ways in which the discourse used in same-sex marriage court cases is related to heteronormative discursive frames; the lived reality of married same-sex couples and the complex ways in which they think about marriage and heteronormativity; the ways that heteronormativity is racialized, which affects how African Americans perceive the impact of same-sex marriage on their lives; how same-sex marriage has influenced public opinion and the likelihood of anti-gay backlash; and the impact of same-sex marriage on family law. In this article, I draw on the empirical research from these articles to develop a theoretical framework that expands a multi-institutional (MIP) approach to understanding social movements and legal change. I build on and develop three conceptual tools: the assimilationist dilemma, discursive integration and cooptation, and truth regime. I conclude by laying out an agenda for future research on the impact of same-sex marriage on LGBTQ movements, politics, identities, and communities.     

Mechanisms Linking Self-Regulation and Sexual Behaviors in Never-Married Young Adults

Little is known about specific mechanisms linking self-regulation to sexual risk taking. The present study considered four possibilities in emerging adulthood: sexual self-restraint, consideration of future consequences, substance use, and romantic competence. Never-married young adults (N = 274), ages 18 to 24, responded to anonymous Internet surveys (60.2% female, 78.8% European American, 66.3% university students). The effects of self-regulation were primarily indirect but varied by sexual behavior, suggesting that high self-regulation limits sexual risk via high sexual self-restraint and low substance use. High regulation was linked to multiple sexual partners and high-risk practices risk via high romantic competence, high self-regulation was linked to multiple sexual partners and high risk practices.     

Examining residence status as a risk factor for health risk behaviors among college students

Objective: The current study is aimed to evaluate college student residence as a unique risk factor for a range of negative health behaviors. Participants: We examined data from 63,555 students (66% females) from 157 campuses who completed the National College Health Assessment Survey in Spring 2011. Methods: Participants answered questions about the frequency of recent use of alcohol, tobacco, marijuana, and illicit drugs, as well as sexual risk behavior in the last 30 days. Sexual risk behaviors were operationalized as having unprotected vaginal sex (yes/no) and the number of sexual partners. Results: Logistic regression analyses revealed that living off-campus is a unique predictor of alcohol, tobacco, marijuana, and illicit drug use, as well as engaging in unprotected sex and a greater number of sexual partners (all ps <. 01). Conclusions: Students living off-campus exhibit more substance use and sexual risk behaviors than students living on-campus, independent of gender, age, or race.     

The faces of local TV news in America: youth,whiteness, and gender disparities in station publicity photos

TV news is a visual medium that requires its on-air journalists to look good, but a history of lawsuits and survey research suggests that this burden is spread unevenly. Critics charge that women are expected to look younger and sexier, and minority broadcasters are held to a White standard of beauty. This project investigated the reality behind those complaints by examining the faces of on-air journalists working for local stations in the US according to race, gender, and attractiveness. The resulting content analysis of more than 400 online publicity photos suggests that a certain look dominates for men and for women and that the range of appearance standards is wider for men than women.