“小产权房”应理性看待和恰当解决

“小产权房”问题的产生既有历史原因也有现实原因，目前在关于“小产权房”地位的论争中存在两种截然相反的观点。对“小产权房”的合法化不应一概反对，应具体分析，恰当处理与疏导“小产权房”问题，从农村内部、城市内部和城乡一体化发展中寻求解决途径。     

行政组织边界理论基础上的我国农业行政执法体制改革理论模型研究

农业行政执法正逐步成为一项重要的农业行政职能 ,农业行政综合执法是我国农业行政执法体制改革中产生的新生事物 ,在实践中受到各方利益群体的质疑。本文以我国行政体制改革是行政边界和行政组织边界的双重边界重构为理论基础 ,研究归纳出我国农业行政执法的三种理论模型 ,并阐述了模型形成的依据和模型的替代顺序 ,认为综合执法是我国现阶段提高农业行政执法效率切实可行的选择 ,从长远来看也可能是一种过渡形式。     

Personal Network Correlates and Predictors of Homelessness for Injection Drug Users in Baltimore, Maryland

Injection drug users are at high risk for homelessness and human immunodeficiency virus (HIV) infection. This study sought to examine incidence rates and the social and economic antecedents of homelessness of impoverished inner-city injection drug users. Of the 569 participants, from a nontreatment sample who participated HIV prevention study, interviewed at baseline, 324 (57%) were reinterviewed 5.2 months later. At baseline 48% of the participants reported that they had been homeless in the past 10 years. Of the 324, 18% reported that at both interviews they had been homeless within the prior 6 months, 12% reported homelessness at baseline but not at follow-up, and 8% reported homelessness at follow-up but not at baseline. At baseline personal social support network characteristic of size of material aid and size of sex network was found to be associated with self-reports of homelessness. Baseline reports of presence of mother in personal network, size of material aid network, and network density were found to be associated with reports of homelessness at follow-up. These result suggest the need for alternative approaches to addressing issues of homelessness injection drug users.     

Stressful neighborhoods and depression: a prospective study of the impact of neighborhood disorder

Quantitative and qualitative research suggests that urban disadvantaged environments may be highly stressful to their inhabitants. Social disorganization may be deleterious to both physical and mental health. The relationships among perceptions of one's neighborhood, measures of social support and social integration, and level of subsequent depressive symptoms was examined with a community sample of 818 individuals screened for an HIV prevention intervention, most of whom were current or former drug users. After adjusting for baseline levels of depressive symptoms, perceptions of neighborhood characteristics (vandalism, litter or trash, vacant housing, teenagers hanging out, burglary, drug selling, and robbery) predicted depressive symptoms at a 9-month follow-up interview. Measures of social support and social integration, entered as interactions with neighborhood perceptions, did not buffer the effect of neighborhood perceptions. However, CES-D scores at follow-up for frequent church attendees were lower. The data support theories of social disorganization and social stress and suggest the need for structural intervention.     

重构现场:新闻报道的空间叙事策略

新闻报道的空间建构是新闻报道有效叙事之重点环节,聚焦于现场的报道,是一种立足于深刻认知新闻现场和现场新闻之内在关联的选择性重构,现场既代表新闻报道的语境与情境还原,同时也是实现传受双方互动理解的一种审美超越。现场的报道空间建构不仅体现出新闻报道的时效要求对叙事策略选择的必然,更通过叙事设计的结构化、进入化策略来实践传受双方知觉场的共建,尤其在当代新媒体环境下,新闻报道的空间叙事策略将伴随社会空间的心灵感知而不断创新发展。重视并有效发掘、应用那些能够激发受众感知的想象力的空间要素,才是新闻报道未来创新的方向,空间的重构也绝非是媒介技术提供的拟态逼真,而是构建合乎受众认知需求与审美体验的空间实践,是叙事的社会参与,也是其心灵对话空间的共建。     

Transformations of Old Colony Mennonites: the making of a trans‐statal community

Through an analysis that combines the historical development of the Old Colony Mennonites, which covers their migrations from sixteenth‐century Europe to late twentieth‐century Latin America, with ethnographic field work in Bolivia and Argentina, I examine the genesis and maintenance of a religiously based trans‐statal community. I argue for the conceptual maintenance of a clear distinction between transnational and trans‐statal processes in understanding the cross‐border practices of Old Colony Mennonites. Mennonites do not move in and out of nations but between the territories over which different states claim sovereignty. I further show that the trans‐statal practices of Old Colony Mennonites are a strategic means of outmanoeuvring states in their imposition of national identities within a context of nation‐states being the dominant political formation. The case contributes to the call for a shift in emphasis from nations to faith communities in transnational and trans‐statal studies.     

产品"商家设计"的价值

由于商业经营者的积极参与而导致设计过程与设计方式发生改变,是当前产品设计活动中出现的一个新的现象,即产品设计过程中的“商家设计”现象。“商家设计”活动由特定的市场环境与技术条件所催生,其价值不仅在于能够为产品生产企业、产品营销商和产品用户带来现实的利益,同时还在于拓展了工业设计实践的领域,为工业设计应用方法研究提供了新的空间。     

血管生成素通过ERK信号通路促进HeLa细胞的增殖

目的通过细胞外信号调节激酶（extracellularregulatedproteinkinases,ERK）通路及NF-xB信号途径探讨血管生成素（angiogenin,Ang）对HeLa细胞的促增殖及抗凋亡作用机制。方法用不同浓度的重组人Ang刺激HeLa细胞,MTr法分析Ang对HeLa细胞的促增殖作用,蛋白质印迹实验检测ERK信号通路相关分子的表达情况。U0126抑制ERK信号通路,检测Ang诱导的ERKl／2的磷酸化及c—myc的表达情况,同时检测Ang对细胞增殖的影响。敲低Ang的表达,检测细胞的凋亡情况。双荧光素酶报告基因检测Ang对NF-KB报告基因的激活。蛋白水平检测Ang刺激的HeLa细胞后,NF—KB通路相关分子的表达。结果Ang能促进HeLa细胞增殖,ERKl／2的磷酸化水平及c—myc的表达随重组人Ang浓度的升高而增加。U0126能抑制Ang诱导的ERKI／2的磷酸化、c—myc的上调及细胞的增殖。Ang的低表达促进HeLa细胞的凋亡,但不影响NF-KB报告基因的激活及NF—KB通路上相关分子的表达。结论Ang能够促进HeLa细胞增殖,并通过活化ERK通路促进细胞的增殖,但其抑凋亡作用与NF-KB通路无关。     

The analysis of multiple ties in longitudinal egocentric network data: A case study on bidirectional relationships between trust and drug use

We extend multi-level models to examine single egocentric network ties to the joint analysis of paired dynamic ties. Two analytic challenges are addressed. First, inference needs to account for multiple layers of nesting: ties are nested within pairs, pairs are nested within time points, and time points are nested within egos. Second, the focus is on the relationship between two dynamic ties; specification of outcome and predictor may be difficult. Instead, we treat both ties as outcomes. Our approach is used to analyze trust and reported drug use between egos and alters over time in a Bayesian framework.