Age and sex related measurement of craniofacial soft tissue thickness and nasal profile in the Chinese population

The purpose of this study was to acquire accurate data of craniofacial soft tissue thickness (CFSTT) and nasal profile in Chinese people of Han population. A total of 31 anatomical landmarks and 4 nasal profile parameters were determined using magnetic resonance imaging (MRI) in 425 subjects (233 males and 192 females). In the present study, the mean CFSTT values of male subjects exceeded those of female subjects at most anatomical landmarks except at seven (22.58%) and 6 out of the 7 landmarks were bilateral anatomical landmark points. The age-related and sex × age interactions were found to be statistically significant at all landmarks. Significant differences were found in the nasal profile data of males and females, and 15 out of 20 different groups had significant differences between sexes, and the mean values of nasal length, nasal height, nasal depth and nasal breadth in males were all greater than those in females. Furthermore, both CFSTT and nasal profile showed good correlation with age. The thickest CFSTT of male and female were found at the respective ages of 45-59 and 35-44, and the nasal profile becomes more constant after 24 years of age. CFSTT of the lower part of the face shows greater variation compared to the upper part, so special care needs to be applied when reconstructing the lower portion of the face. Our data on CFSTT and nasal profile for the Chinese Xi'an Han population is important in understanding craniofacial characteristics of the Chinese population and might be potentially helpful in forensic identification.     

Analysis and application of relationship between post-braking-distance and throw distance in vehicle-pedestrian accident reconstruction

Through theoretical analysis and introduction of some empirical parameters, the relationship between post-braking-distance and throw distance was studied concentratedly. Here, the post-braking-distance is the distance a vehicle will travel from the impact position to when it comes to a complete stop. Two useful formulas which are meaningful in vehicle-pedestrian accident reconstruction were finally obtained. The first one can be used to calculate impact speed according to throw distance, while the other one can describe the relationship between post-braking-distance and throw distance. Their feasibility has been validated by comparing with other scholars' empirical formulas and simulation results of software Pc-Crash, respectively. The relationship between post-braking-distance and throw distance has very bright application perspective in vehicle-pedestrian accident reconstruction such as helping policemen obtain more useful evidences, validating credibility of the throw distance, judging whether the vehicle is fully braked or not, determining the impact position etc. Finally its application was demonstrated by three cases, in which the impact speed was also calculated. All results until now have shown that conclusions obtained in this article are feasible and helpful in vehicle-pedestrian accident reconstruction.     

广东省6～15周岁汉族人牙龄的研究

目的研究广东省6～15周岁人群牙齿钙化的规律,建立根据牙齿钙化程度推断未成年人年龄的方法。方法观测2 710例（男性1 363例,女性1 347例）广东省6～15周岁汉族人全口曲面断层影像片,对其下颌牙齿钙化程度进行评分分级,所得数据经SPSS软件统计分析,建立根据牙齿钙化程度推断年龄的方程,并以100例（男60例、女40例）研究外样本进行盲测。结果数据统计显示,两侧同名牙钙化评分分级值的差异无显著性意义（P〉0.05）,而性别间差异有显著性意义（P〈0.05）;下颌单侧8颗牙齿的钙化评分分级值与年龄相关系数（r）女性为0.552～0.759,男性为0.672～0.838;所建回归模型拟合优度（R2）均在0.7以上,估计值标准误男性为0.91～1.11岁,女性为0.92～0.98岁;盲测推测年龄与真实年龄平均误差男性为0.429±0.282岁、女性为0.399±0.252岁。结论本研究所建方法推断结果准确可靠,可用于广东地区6～15周岁人群年龄推断。     

中国汉族6-18周岁男性牙齿生长发育的年龄研究

目的研究牙齿钙化程度与年龄的关系,建立利用牙齿钙化程度推断中国汉族6～18周岁男性年龄的办程。方法通过对6568名6～18周岁汉族男性全口曲面断层影像上牙齿的钙化程度进行评分;将分级值及其对应年龄输入SPSS软件进行分析,建立推断年龄的方程模型;从研究样本外随机抽取已知年龄的样本160例进行卣测,,结果同名牙齿钙化评分值侧别间秩合检验结果P〉0．05;下颌左侧恒牙钙化评分值与年龄相关分析结果r值均存0．7以上,下颌同名牙间相关系数r均在0．9以上;所建回归模型拟合优度R^2=0．828,估计值标准误为1．23岁;阿测平均洪差为0．423±0．269岁。结论本研究所建立的方法准确可靠,可用于中国汉族6～18周岁男性人群的年龄推断。     

论宪法效力的终极依据

在法律的效力链条中,宪法常常被置于效力的终端。但是,宪法本身的效力依据,却是一个值得追问的终极性问题。宪法序言,就是宪法效力的终极依据。中国宪法序言是通过＂历史＂向宪法提供了终极性的效力依据或正当性依据。相比之下,美国宪法序言是通过＂契约＂向美国宪法提供了终极性的效力依据。     

经济增长与正式法律体系的作用

现有的关于正式法律对经济发展作用的文献大多着眼于法律的保护功能。了解中国法律和经济现状的发展的学者们的主流观点是正式法律在中国的经济发展中所起的作用不大,但是迄今为止尚无充足的证据支持上述观点。除了指出正式法律在合同履行和财产保护方面对中国的经济发展起到了一定的作用外,本文还指出了法律的其他作用,包括信号作用和自我承诺作用。     

论人权条约的保留 兼论中国对《公民权利和政治权利国际公约》的保留问题

传统国际法上存在的关于条约保留制度的"全体一致规则",经由国际法院1951年咨询意见、到1969年《维也纳条约法公约》被完全否定,从而确立了条约保留的效力由各缔约国分别判定的新制度。但人权条约的特殊性又使得条约保留制度面临着诸多新的问题。2002年中国法学界集体课题组《关于批准和实施〈公民权利和政治权利国际公约〉的建议书》所提出的对该《公约》第19条和第22条应提出符合中国法律的"解释性声明",无论从人权条约保留的性质和方式还是从该《公约》目的和宗旨之角度考虑都存在着诸多问题。     

合分之道:构成要件与违法性的阶层关系

构成要件与违法性是三阶层犯罪构成体系的两大核心部分。准确理解两者之间的关系,对于深刻把握这一体系的内在逻辑,有着极为关键的意义。沿着学术发展的脉络,本文首先对构成要件与违法性的一体化趋势进行了梳理。从行为构成要件论到违法性认识根据论,从违法性存在根据论到违法构成要件论,构成要件的观念与内涵不断扩张,违法性判断的内容则被不断掏空乃至形骸化。消极构成要件理论的出现,更是试图彻底取消构成要件与违法性之分,将两者统合为一个判断阶层。面对此种合流之势,文章指出:有必要重申构成要件与违法性之间的界限,并将其作为相互独立的阶层而认真对待。这根源于两者在法价值、法判断、实体效果及程序功能上的重大不同。进而,除了宏观上的区分,对于体系上四处游荡的若干具体要素,文章也力图对其予以体系地位上的妥善澄清。     

环境法律观检讨

当前环境法学表象繁荣的背后隐藏着专业性不强的危机,其根源在于较为落后的法律观。在一些环境法理论中作为言说基础和前提预设的“法”与作为现代法治基础的“法”存在较大差异,具体表现为法律道德主义色彩浓厚、与科学规律界限不明、主体性缺失、孤立立法、与传统法的关系失当五个方面。法律观偏失的环境法学研究在实践中只起到思想启蒙的作用,无助于环境法治的实现。要想获得理论提升和实践突破,环境法学必须对自己的核心任务和研究范围作出准确定位,牢牢把握法的本质特征,加强本土化研究,尊重现行法,采取现实主义思维,实现向法学的回归。     

激光捕获显微切割技术用于分离混合斑中精子细胞

目的 评估激光捕获显微切割(laser capture microdissection.LCM)技术在分离混合斑中少量精子细胞的应用价值.方法 配制不同比例的精液-阴道上皮细胞混合液.分别用差异裂解法和LCM法分离精子细胞,用磁珠法提取精子细胞DNA,并用IdentifilerTM试剂盒进行STR基因型检测.结果 LC...