美国宪法成文形式的历史渊源

本文简要地阐述美国宪法成文形式产生的历史渊源 ,认为近代首部成文宪法的诞生是美国本土长期而渐进的立宪进程的产物 ,它的成文形式可以追溯到早期开启北美殖民进程的英国王室颁发的殖民特许状和殖民者之间签署的殖民地合约 ,同时也受殖民地时期立法实践和宗教传统等方面的影响。此外 ,美国各州在独立后采用成文宪法的实践 ,以及《邦联条例》的起草、通过等事件 ,都为美国成文宪法的最终形成提供了及时的宝贵经验     

浅析阿尤布·汗执政时期的美巴关系

阿尤布·汗是巴基斯坦第一位军人统治者。从1958年就任总统直至1969年被迫下台,阿尤布·汗统治巴基斯坦超过10年。这段时期的美巴关系经历了从亲密到冷淡的转变,并且直接影响了以后美巴关系的发展。更好地了解这段时期的美巴关系,对我们深刻理解冷战时期乃至冷战后的美巴关系都是极为重要的。     

R&D人员投入与天津传统产业升级

R&D人员投入对传统产业的优化升级具有重要意义,考虑到天津在R&D人员投入方面存在的差距,天津应当以R&D人员投入为切入点,加大人才引进力度,优化R&D人员投入结构和经费支出结构,以完成天津传统产业升级这一重要历史使命。     

D18S872基因座在汉、维、蒙古、回族群体中的遗传多态性研究及其应用

目的　调查D18S872基因座在成都汉族 ,新疆维族和蒙古族 ,甘肃回族 4个民族中的遗传多态性 ,获得群体遗传学基本数据。　方法　等位基因分型标准物制备采用分子克隆技术 ,样本基因分型采用PCR和PAG垂直电泳技术、银染显色方法。　结果　获得D18S872基因座等位基因分型标准物及该基因座在 4个群体中的遗传学数据。　结论　结果表明D18S872基因座在法医学个人识别和亲子鉴定中有一定的应用价值。     

美国危机管理系统的发展及启示

美国成立了以预防、处理非自然的危机(恐怖主义)为主要目标的国土安全部,标志着美国危机管理已经结束了单一的、分散管理阶段,成为面向全方位的、以国土安全为目的的完整系统。     

口蹄疫病毒多基因片段的克隆及其杆状病毒表达载体的构建

根据定点突变原理获得了包含口蹄疫病毒P1、2A、3C、3D及部分 2B编码区的目的基因片段 ,经SpeⅠ和HindⅢ双酶切后 ,与经相同方法处理的杆状病毒转移载体 pFastBacHT连接 ,得到了重组质粒 pFB P12X3C3D。经酶切和测序鉴定后 ,将其转化入含穿梭载体Bacmid的感受态细胞DH10Bac ,经抗性及蓝白斑筛选 ,得到了含P12X3C3D多基因的重组穿梭载体 ,将其命名为Bacmid P12X3C3D ;提取其DNA并转染Sf9昆虫细胞 ,最后获得含口蹄疫病毒P12X3C3D多基因的重组杆状病毒。     

丰田零库存管理对我国企业库存管理优化的启示

零库存管理对丰田公司经营的成功发挥了重要作用,对我国现代化企业经营也具有较强的借鉴意义.鉴于我国企业对库存管理存在的认识误区,基于对丰田零库存管理的内涵及应用效果的分析,提出我国企业应学习丰田库存管理的先进经验,避免对零库存管理的认识误区,进一步转变观念、建立新型库存管理模式的观点,并在此基础上针对我国制造业企业在借鉴丰田零库存管理方面提出对策建议.     

三维立体显微镜在文件检验中的应用

目的通过应用先进的仪器设备,让我们从另一个角度观察文检痕迹特征,寻找到一个文件检验的新视角。方法利用三维立体显微镜,从微观的三维状态下分析文检的痕迹特征(上下位置)。结果能有效区别笔迹书写与印章的先后顺序;打印字迹和印章的先后顺序,同一支笔书写形成的交叉笔划的先后顺序;准确区别打印文书和复印文书等。结论借助三维立体显微镜,能使文件检验水平向前迈进一步。     

Stature estimation using foot dimensions via 3D scanning in Taiwanese male adults

In forensic identification, the use of foot dimensions to predict stature is a requisite. For Taiwanese male stature prediction, available information about stature estimation using foot dimensions is still lacking. Therefore, the primary purpose of this study was to establish Taiwanese adult male stature prediction models for various foot dimensions. A total of 2,072 male 3D foot models were collected and the subjects' ages ranged from 18 to 59 years old. Thirteen foot dimensions for each foot were utilized in this study. Bilateral differences were tested using paired t-tests. Stature predictions based on different foot dimensions were conducted using simple linear and stepwise regression methods. The results showed significant bilateral differences in the majority of the selected foot dimensions (p < 0.001). Foot length had the highest positive correlation with stature in the right and left foot. Using length-related dimensions generated better prediction accuracy (0.356 < R² < 0.533, 4.193 < SEE < 4.928), whereas the worst accuracy was observed with angle-related dimensions (0.001 < R² < 0.023; 6.072 < SEE < 6.137) when employing a single foot dimension to estimate Taiwanese male stature. Stepwise regression analysis results indicated that the coefficient of determination was improved to 0.590 and 0.593 by applying five and six foot parameters to predict stature, respectively. The findings of the present study suggest that these stature estimation equations can be applied to predict Taiwanese male stature in the forensic science field.     

Transportation Access,Rental Vouchers,and Neighborhood Satisfaction: Evidence From the Moving to Opportunity Experiment

The Housing Choice Voucher (HCV) program is designed in part to expand the neighborhood choices of assisted households, thereby enabling assisted households to find a living environment that simultaneously meets their housing and neighborhood preferences. While several studies have examined the impact of rental subsidies on neighborhood satisfaction, few have examined whether access to adequate transportation enables HCV recipients to locate housing in more desirable locations. This article relies on data from the Moving to Opportunity experiment to examine the impact of transportation access, rental housing vouchers, and geographic constraints on neighborhood satisfaction. We find that access to both vehicles and public transit positively influences neighborhood satisfaction, and the influence of vehicle access varies with transit proximity. These findings point to the importance of transportation in helping low-income assisted renter households locate housing in more desirable neighborhoods.