美国“精明增长”对我国城市空间扩展的启示

论述了目前国内外讨论比较多的"精明增长"(Smart Growth)产生的背景及其主要内涵,对我国城市空间扩展的具体情况进行了分析,并结合我国城市发展的具体情况,从美国城市蔓延的前车之鉴中得到教训,从城市发展策略和技术手法上将"精明增长"的理念用来指导我国城市发展的具体实践.     

Basic research and the success of federal lab-industry partnerships

This paper examines the role that basic research plays in the strategies pursued by industry in their interactions with federal labs. It draws on questionnaire-based data of 229 federal laboratory-industry joint R&D projects with 219 companies and 27 laboratories. The study documents the relative importance of basic research in the success of the interactions by comparing the incidence of basic research on several indicators of success. The study shows that, even though projects involving basic research tend to have higher costs, they also have a high percentage of product outputs in the short term. Typical high payoff strategies for partnership were those in which the company performed several technical roles and the federal laboratory was more narrowly focused. The authors gratefully acknowledge the support of the National Science Foundation, Research on Science and Technology Program, Contract No. 9220125. The views expressed here are the authors' and do not necessarily reflect those of the National Science Foundation or any other institution.     

论行政法的宪政基础——对行政法与宪法之间关系的再认识

在对行政法与宪法之间关系的认识上,我国行政法学界的主流观点存在一定的片面性。事实上,行政法与宪法具有作为公法的同一性;两者之间也存在作为部门法的差异性;最为重要的是,“宪政国家是行政法的前提”,行政法必须构建在宪政基础之上——行政权的合法性来自于其在宪政结构中的地位与职能、宪政控制行政法治的性质与方向、宪政决定并塑造行政法的风貌与品格。中国行政法同样需要具备宪政基础。     

《公安信息系统应用》课程与警察院校计算机基础教学改革

目前,大学各专业的专业课与公共基础课在课时安排上面临较大冲突,计算机课程要如何安排才能培养学生的计算思维能力,满足不同专业学生共同面对的信息化时代的需求,是我们需要深入思考与讨论的问题。我们针对公安"二学位"学生的计算机应用水平较大差异的特点,对计算机基础课程《公安信息系统应用》从教学内容、教学大纲、教学方法与手段上进行了一系列改革探讨,为警察院校计算机基础教学改革提供新的思路。     

农用地质量是由哪些要素构成的?——农用地分等规程解读

农用地的基本功能是为社会提供农产品,其质量可以用产量水平进行度量.该文解读了《农用地分等规程》采用定量方法综合评定农用地的质量所涉及“天”、“地”、“生”、“人”四个方面因素.“天”的因素是宏观的,是决定一个地区耕地自然质量的首要条件,其连续变化的特点,是耕地等别序列全国可比性的自然基础.“地”的因素是区域性和地方性的,决定着耕地自然属性特征的多样性,也是导致耕地自然质量差异显著、评价因素复杂的主要原因.“生”的因素是耕地形成有效产出的关键,作物品种的差异不仅影响耕地的产量,更影响农产品的品质.“人”是开发、利用和改造耕地的关键因素,具有巨大的建设能力或破坏力量.最后,该文认为遵循因地制宜、合理利用的原则,通过土地整治,提高耕地质量,将是中国耕地保护与生产能力建设的重要途径.     

犯罪均值频率——一种犯罪时间分布的测度指标

犯罪在时间分布方面有其特定规律,常规的犯罪总数或平均数等统计量存在不稳定性、偏差性和数据保密性等问题,不利于犯罪时间分布特征的客观对比分析。犯罪均值频率指标克服了传统时间分布统计量存在的问题,可以用来分析犯罪是否偏好发生于特定的时间内,满足了犯罪时间分布规律分析需求。运用该指标对某市5年内的入室盗窃犯罪在星期日别、月份上的时间分布规律进行了实证研究,结果表明,入室盗窃在该市3月份和9-12月份表现为高发期,而在周末则表现为犯罪低谷期。     

GC/MS衍生化测定精浆中游离支链氨基酸和果糖

目的 建立人精浆中支链氨基酸和果糖的气相质谱衍生化分析方法.方法 精液样本液化离心后,按精子活率的临床标准分为正常组和非正常组,经TMS微波衍生化,GC/MS分析两组支链氨基酸、果糖衍生物含量差异.结果 正常组与非正常组的缬氨酸,亮氨酸,异亮氨酸在相对含量上均有一定差异.正常组3种氨基酸相对含量高于非正常组.果糖分析观察到同样的特征,正常组相对含量高于非正常组.结论 精子活率低的精浆样本仍可检出支链氨基酸和果糖,其差异有助于无精子、少精子精斑的法医学鉴别.     

Comparison of two methods for isolating DNA from human skeletal remains for STR analysis

Abstract: The quality and efficiency of a standard organic DNA isolation method and a silica‐based method using the QIAGEN Blood Maxi Kit were compared to obtain human DNA and short tandem repeats (STRs) profiles from 39 exhumed bone samples for paternity testing. DNA samples were quantified by real‐time PCR, and STR profiles were obtained using the AmpFlSTR^® Identifiler^® PCR amplification kit. Overall, the silica‐based method recovered less DNA ranging from 0 to 147.7 ng/g (average 7.57 ng/g, median = 1.3 ng/g) than did the organic method ranging from 0 to 605 ng/g (average 44.27 ng/g, median = 5.8 ng/g). Complete profiles (16/16 loci tested) were obtained from 37/39 samples (95%) using the organic method and from 9/39 samples (23%) with the silica‐based method. Compared with a standard organic DNA isolation method, our results indicate that the published silica‐based method does not improve neither the quality nor the quantity of DNA for STR profiling.     

Traumatic bilateral vertebral artery dissection

Traumatic vertebral artery dissection is not often seen by forensic pathologists, and cases investigated are scarce in the forensic literature. We present the case of a 40-year-old woman cyclist who was struck by a car while wearing a helmet, and was neurologically near normal immediately thereafter at Emergency. She presented 48 h later with acute right hemiparesis, decreasing level of consciousness, and unsteadiness. CT revealed massive cerebellar infarction. CT angiography was normal. The patient died in coma 7 days after injury and autopsy revealed bilateral edematous cerebellar infarction and bilateral vertebral artery dissection. Rotational neck injury and mural tear in the wall of the Atlantic parts of both vertebral arteries is suggested as the possible mechanism of the arterial injury. Head and neck injuries are reported as a precipitating cause of vertebral artery injury. The possible influence of trauma may be further underestimated if longer intervals between vessel dissection and ischemia occur. The current case illustrates that "talk-and-die" syndrome may be due to occult vertebral artery dissection, possibly bilateral. In forensic cases of delayed death after mild trauma to the head and neck, the vertebral arteries should be examined for the cause of death.