An analysis of the neighborhood impacts of a mortgage assistance program: A spatial hedonic model

Down payment or closing cost assistance is an effective program in addressing the wealth constraints of low‐and moderate‐income homebuyers. However, the spillover effect of such programs on the neighborhood is unknown. This paper estimates the impact of the City of Dallas Mortgage Assistance Program (MAP) on nearby home values using a hedonic model of home sales from 1990 to 2006. We define neighborhoods of 1,000 feet around each sale and estimate the average differences in sales prices between neighborhoods with various numbers of MAP properties before and after their appearance. We find that MAP properties tend to locate in neighborhoods with lower property values; however, unless a concentration of MAP properties forms, the infusion of MAP properties has little detrimental impact on neighboring property values. Moreover, low concentration of MAP properties has a modest positive impact on surrounding property values. © 2010 by the Association for Public Policy Analysis and Management.     

小康社会人的全面发展环境系统分析

小康社会人的全面发展离不开其生存的自然环境,并时时受社会人文环境的影响和作用。构建和优化小康社会人的全面发展系统,其实现路径主要是:以科学发展观指导人的全面发展环境系统的构建;以加强“三个文明”建设优化人的全面发展环境系统的构建;以学习型社会为平台促进人的全面发展环境系统的构建。     

Contribution of parkland trees to farmers’ livelihoods: a case study from Mali

Native species of trees and shrubs contribute significantly to farmers' livelihoods by supplying food, medicinal products, fodder, and wood. In the case study reported in this article, this contribution to farmers' annual revenue varied from 26 per cent to 73 per cent, and was as high as US$ 650 a year for households for which agroforestry products were the primary source of revenue. Household consumption was not quantified in the study, but farmers' comments confirmed that native trees also played an important role in assuring food security, especially in the ‘hunger period’ when grain stores are low and farmers are waiting for the next harvest.     

专家辅助人出庭质证规则研究

现代科学技术的迅猛发展对司法审判产生了巨大的影响,各种科学问题、技术证据、鉴定意见呈现于法庭,法官在审判案件中由于知识和经验的局限性而难以判断,在此背景下专家辅助人制度应运而生。英美法系有专家证人制度,存在完善的以交叉询问为主的专家证人出庭质证规则,大陆法系国家和地区有诉讼辅助人制度,虽然立法中没有明确的出庭质证规则,但是有完善的鉴定人出庭质证规则。我国当前专家辅助人出庭质证规则没有明确的规定,但准用证人出庭质证规则。不过目前缺乏进一步的理论阐述,且简单直接适用也存在问题,同时缺乏系统的、具体的、具有可操作性的质证规则。对此笔者提出构建专家辅助人出庭质证规则的建议。     

膜攻击复合物对继发性脑损伤的影响

脑损伤后普遍存在的炎性反应激活补体并通过多种途径导致和加重继发性脑损伤。膜攻击复合物具有直接破坏血脑屏障、促使红细胞溶解、促进释放细胞因子、氧自由基和金属基质蛋白、加剧炎症反应的生物特性,从而加重继发性脑损伤。本文对膜攻击复合物造成继发性脑损伤的研究进行综述,希望能对相关研究和法医学鉴定提供参考。     

绵羊血浆阿维菌素荧光高效液相色谱检测法的建立

建立了一种绵羊血浆中阿维菌素 (AVM )荧光高效液相色谱 (HPLC)检测法。用甲醇提取绵羊血浆中的AVM ,并用ODS C18固相萃取法进行纯化 ,纯化后的AVM经干燥处理后 ,用三氟乙酸酐和N 甲基咪唑对其进行荧光衍生化 ,用荧光HPLC进行检测。本方法的最低检测限为 0 .1ng/mL ,在血浆AVM含量 2 .5～ 5 0 .0ng/mL范围内 ,标准曲线方程为Y =2 72 12x -10 412 (r =0 .9995 ) ,样品的平均回收率为 92 .0 2 %± 6.3 3 %。批内变异系数 1.98%～ 6.2 2 % ,批间变异系数 2 .3 1%～ 8.94%。检测结果显示 ,本方法灵敏度高 ,干扰少 ,重复性好。     

企业与利益相关者关系的重新定位——基于哈贝马斯对话伦理的研究

企业与利益相关者关系的理论分析主要集于工具性视角与规范性视角.工具性视角以经济绩效为追求,由于未更好地嵌入规范的社会理论当中,其目的虽明确但方向却不然.规范性视角以阐明企业经营中利益相关者参与的应然内涵为己任,其超然的独白角色难免冷落的际遇.利益相关者的实践模式亦须超越.藉由对话伦理的分析,为重新定位和探索企业与利益相关者的关系提供了新机遇,无论是对利益相关者理论的理路承接,还是对既有命题的逻辑阐释,都显示较强的逻辑自洽性.进一步,由此构建的对话实现框架,为企业经营实践提供了新参照.这些都为进一步反思当前企业社会责任的若干问题给予了深刻警醒.     

异位方配合甲氨蝶呤治疗异位妊娠32例临床观察

目的:观察自拟异位方配合甲氨蝶呤(MTX)治疗异位妊娠的临床疗效.方法:采用随机方法将63例异位妊娠患者分为两组(治疗组32例,对照组31例),治疗组接受异位方加MTX治疗,对照组单用异位方治疗,观察两组保守治疗异位妊娠疗效.结果:治疗组治愈率(84.37%)高于对照组(64.51%)(P<0.05);治疗组β-HCG下降至正常及阴道流血停止时间短于对照组(P<0.01或P<0.05);治疗组治疗后包块缩小程度大于对照组,差异有显著性(P<0.01).结论:中西医结合治疗异位妊娠可加速β-HCG下降,减少阴道流血时间,促进包块吸收,降低保守治疗风险,缩短疗程,提高疗效,有利于输卵管功能的恢复.