无线传感器网络的最优安全性跳数算法研究

在分析了最小跳数路由算法的局限性基础上提出了最优跳数算法,该算法充分考虑了无线传感器网络的跳数、能量、负载问题,以求在三者平衡中达到网络路由的最优。通过对最优跳数算法进行的仿真,显示研究成果可以有效地提高无线传感器网络路由的可靠性和稳定性,能够达到平面路由算法的最好效果,即通过传输数据量较小的邻点信息表,就可以高效、可靠地传输有效数据,得到很高的有效数据率。     

W.E.B. Du Bois and Filipino/a American exposure programs to the Philippines: race class analysis in an epoch of ‘global apartheid’

The article highlights the ongoing relevance of W.E.B. Du Bois for the global analysis of race and class. Engaging scholarly debates that have ensued within the educational subfields of critical race theory (CRT) and (revolutionary) critical pedagogy, the article explores how a deeper engagement with Du Bois’s ideas contributes theoretically and methodologically to these two subfields. Of particular focus is Du Bois’s conceptualization of a ‘guiding hundredth,’ which he forwarded as a corrective to his ideas of a ‘talented tenth.’ The article also offers a case study analysis of the film Sounds of a New Hope, which documents a hip hop exposure program to the Philippines. The case study draws upon Du Bois’s ‘guiding hundredth’ for a twenty-first century context as a Filipino American cultural worker utilizes hip hop to articulate, analyze, and alter the lived experiences for Filipino/a Americans in a global diaspora.     

Freedom within bars: maximum security prisoners’ negotiations of identity through rap

This paper examines the construction of prisoners’ identity through rap in England’s high security prisons. While hip hop studies has often addressed rap’s connection to the social practices of criminalized youths, prison rap cultures have received scant attention. This paper draws on a series of rap workshops and interviews with prisoners to investigate the experiences of black prisoners in high security prisons and how identities are produced and negotiated through rap. Rap is associated with the production of a range of identities and identifications, enabling prisoners to accommodate themselves to the conditions of their incarceration and to challenge aspects of the criminal justice system that they experience as unfair or illegitimate.     

Fabulachia: urban,black female experiences and higher education in Appalachia

Abstract

This article draws on focus group conversations with black female college students attending a small, liberal arts institution in Kentucky. Based primarily on group interviews and discussions, as well as observations and analysis – a theoretical domain (referred to throughout the article as ‘Fabulachia’) emerged as a site-specific outcome of events and ideas regarding race, gender and identity experienced by the research participants. Specifically, ‘Fabulachia’ functions as a theoretical hybrid space in which urban (e.g. ‘ghetto fabulous’) black college student-voices find a sense of empowerment as they construct their own narratives of leaving ‘the hood’ to attend college in rural Appalachia. This project revises and updates previous research on race and rural identity/ies in order to situate the urban black female experience into an Appalachian context. Drawing on hip hop feminism and urban education based theoretical paradigms, the Fabulachia study seeks to give voice to black females in contemporary Appalachia, with attention to their self-proclaimed ‘ghetto fabulous’ identities honed in and through their urban upbringings. The unique experiences of (Fabulachian) black females are an important and largely absent part of larger conversations of the growing body of Urban education research that seeks to situate the black student/black youth and schooling experience in the US. In the Fabulachia study, a group of black female students shared personal narratives (part-oral history and part direct response) to prompts and queries about the role of hip hop culture, race and gender identity in their lives. They also discussed and debated what it means to be a black female in contemporary (often racist) Appalachia, and about how their families and urban surroundings influenced their processes of being and becoming in the context of higher educational achievement.     

Bayesian discrete latent spatial modeling of crack initiation in orthopaedic hip replacement bone cement

In this paper, we propose a spatial model for the initiation of cracks in the bone cement of hip replacement specimens. The failure of hip replacements can be attributed mainly to damage accumulation, consisting of crack initiation and growth, occurring in the cement mantle that interlocks the hip prosthesis and the femur bone. Since crack initiation is an important factor in determining the lifetime of a replacement, the understanding of the reasons for crack initiation is vital in attempting to prolong the life of the hip replacement. The data consist of crack location coordinates from five laboratory experimental models, together with stress measurements. It is known that stress plays a major role in the initiation of cracks, and it is also known that other unmeasurable factors such as air bubbles (pores) in the cement mantle are also influential. We propose an identity-link spatial Poisson regression model for the counts of cracks in discrete regions of the cement, incorporating both the measured (stress), and through a latent process, any unmeasured factors (possibly pores) that may be influential. All analysis is carried out in a Bayesian framework, allowing for the inclusion of prior information obtained from engineers, and parameter estimation for the model is done via Markov chain Monte Carlo techniques.     

Racial Formation Theory and Systemic Racism in Hip‐Hop Fans’ Perceptions

This work contributes empirical research to racial formation theory (RFT) and systemic racism (SR), demonstrating how these theories complement each other. There are few practical applications of these theories. This research examines RFT and SR from the perspective of hip‐hop fans. I qualitatively examine how 23 nonblack women articulate the relationships of race, class, and gender through discussion of hip‐hop music and videos that accompany it. Findings suggest that hip‐hop is a site of racial formation. Participants spoke from a color‐blind perspective and white racial frame so that they perpetuated ideals of systemic racism theory.     

GLOBAL BLACK SELF-FASHIONINGS: HIP HOP AS DIASPORIC SPACE

This essay examines how the “black” racial significance of hip hop culture is received, interpreted, and redeployed within the Afro-Atlantic world. Beyond questions of cultural consumption and reproduction, it is argued that hip hop's expanding global reach has facilitated the contemporary making and moving of black diasporic subjects themselves. Here, African descendant youth in an array of locales use the performative contours of hip hop to mobilize notions of black-self in ways that are at one time both contestive and transcendent of nationally bound racial framings. Hip hop in this way can be seen as enabling a current global (re)mapping of black political imaginaries via social dynamics of diaspora. In pursuing this argument, this essay looks toward hip hop movements in Brazil, Cuba, and South Africa as compelling, yet varying examples of how transnationally attuned identities of blackness are marshaled in the fashioning of diasporic subjects through hip hop.     

‘(What's so funny ‘bout) peace,love & understanding’: rock culture and the rebuilding of civic identity in the post-conflict Balkans

The article examines current rock culture in the Balkans as a potential vehicle for rebuilding the broken sociocultural bonds between the different post-Yugoslav societies and for creating a constructive cultural space for articulating new forms of civic and post-nationalist identities. The argument offered is that, after the sociocultural exile during the war years, rock culture in the post-conflict Balkans has considerable potential to establish itself as a popular-cultural force of ‘utopian transcendence’ of the current ethno-nationalist sociopolitical moment, and as a catalyst of the new post-Yugoslav spirit of openness, tolerance and peaceful coexistence.     

Perceptions of Misogyny in Hip Hop and Rap: What Do the Youths Think?

This article presents the results of an exploratory study conducted at a community forum sponsored by a prominent African American church and a historically Black university. These institutions are concerned with negative messages given to African American females about their appearance and their morals. The data presented describe the population of female (68.6%) and male (31.4%) participants ages 18 to 24 and inform us about their perceptions about hip hop and rap music, especially as they relate to misogyny. This study found that listening habits and age were significant in understanding youths' views about misogyny.     

老年妇女骨质疏松性髋部骨折的危险性预测

目的探讨老年妇女骨质疏松性髋部骨折的危险性因素,建立判别方程,为预测老年妇女骨质疏松性髋部骨折提供依据.方法以髋部骨折老年女性患者及保健体检的老年妇女各30例为研究对象,分为观察组和对照组.测量所有样本髋部BMD(病例组为健侧,对照组为左侧)、颈干角(NSA)、左手握拳力;根据身高体重算出BMI;确定个人及家族女性骨折史.通过logistic回归分析及判别分析,进行统计学处理.结果老年妇女骨质疏松性髋部骨折的危险因素为:ward区BMD、NSA、BMI、左手握拳力;老年妇女骨质疏松性髋部骨折的危险性判别方程:Y1=-8.802×X1 88.803×X2 9.936×X3 8.119×X4 2.634×X5 22.439×X6-691.647,Y0=-9.901×X1 93.959×X2 15.872×X3 8.045×X4 3.037×X5 23.533×X6-696.284;将判别方程进行组内回代检验,特异度为76.7%,灵敏度为86.7%,预测正确率为81.7%.结论通过判别方程能够预测老年妇女骨质疏松性髋部骨折的危险性.