4株猪瘟流行野毒株病毒结构蛋白E2基因的核苷酸序列分析

应用RT-PCR和nPCR扩增由4株甘肃省近期(1997-1998)猪瘟流行野毒株的E2基因,将其克隆到pGEMTEasy载体上,经转化、筛选、鉴定后,测出核苷核序列.4株流行毒株的E2基因核苷酸序列同源性为89.2%-99.7%,相应的氨基酸序列同源性为93.8%-99.0%.这4株流行毒株;与C-株(疫苗种毒)E2基因的核苷酸序列同源性为82.2%-84.3%,相应的氨基酸序列同源性为87.9%-90.2%,表明近期猪瘟流行毒株与C-株的gp55蛋白之间存在一定的差异.     

青少年视野中的儿童参与状况调查

为了探索青少年对上海市儿童参与状况的理解,本研究对1234名上海市中学生进行了问卷调查。调查结果显示显示了儿童参与情况的一系列特点,诸如,大部分青少年不熟悉儿童参与权,青少年参与家庭重大决策的机会很少,参与期望也不高,青少年参与课堂教学的程度较低,缺乏参与学校管理的兴趣,等等。     

文莱:2016年回顾与2017年展望

2016年,文莱继续保持多年来的格局,政治社会稳定,人民生活富裕;由于受到国际油价低位徘徊的影响,导致经济没有完成年度计划,呈现了负增长;外交上,根据国家既定的对外政策尽力参与地区及世界上的外交活动.展望2017年,文莱仍然保持这种发展格局.     

世界银行的反腐败标准及其对金砖银行制度建设的启示

本文系统考察了世界银行反腐败标准的形成过程及其对金砖银行反腐败制度建设的启示,认为世界银行的反腐败政策经历了一个重要变迁,而后者的动力正是来自于世界银行主要捐款国对本国反腐败议题的重视。自世行成立以来,治理和反腐败问题一直是其不愿触及的"政治禁区",但在20世纪90年代中期后,尤其是在沃尔芬森和沃尔福威茨两任行长的推动下,世界银行日益关注借款国的国内治理和反腐败状况,并将之作为其提供贷款的重要条件,事实上,这与美欧日等主要股东国在世纪之交高度重视国内的反腐败议题以及世界银行自身以股东国导向为准的制度特征密切相关。作为发展中国家自主创立的新开发银行,金砖银行更多地强调借款国主导和采用国别体系,充分体现借款国自身的发展理念和战略,因而应该采用一套更为灵活多样、更符合借款国实际的治理与反腐败标准。     

Reciprocal Relationships between Teacher Ratings of Internalizing and Externalizing Behaviors in Adolescents with Different Levels of Cognitive Abilities

Are internalizing and externalizing behavior problems interrelated via mutually reinforcing relationships (with each behavior leading to increases over time in levels of the other behavior) or mutually suppressing relationships (with each behavior leading to decreases over time in levels of the other behavior)? Past research on the directionality of these relationships has led to ambiguous results, particularly in adolescence. Furthermore, the extent to which prior results will generalize to adolescents with low levels of cognitive abilities remains unknown. This second limit is particularly important, given that these adolescents are known to present higher levels of externalizing and internalizing behaviors than their peers with average-to-high levels of cognitive abilities, and that the mechanisms involved in the reciprocal relationships between these two types of behaviors may differ across both populations. This study examines the directionality of the longitudinal relationships between externalizing and internalizing behavior problems as rated by teachers across three measurement waves (corresponding to Grades 8–10) in matched samples of 138 adolescents (34.78?% girls) with low levels of cognitive abilities and 556 adolescents (44.88?% girls) with average-to-high levels of cognitive abilities. The results showed that the measurement structure was fully equivalent across time periods and groups of adolescents, revealing high levels of developmental stability in both types of problems, and moderately high levels of cross-sectional associations. Levels of both internalizing and externalizing behaviors were higher among adolescents with low levels of cognitive abilities relative to those with average-to-high levels of cognitive abilities. Finally, the predictive analyses revealed negative reciprocal longitudinal relationships (i.e., mutually suppressing relationships) between externalizing and internalizing problems, a result that was replicated within samples of adolescents with low, and average-to-high levels of cognitive ability.     

Population Pressures and the North–South Divide between the first century and 2100

This article examines the relationship between the populations of the more and less developed societies between the first century and 2100. Such an analysis reveals a changing dependency between the level of development (and GDP) achieved and population numbers between the first century and 1998. In relation to the past the article suggests a dynamic model for dividing the world into more and less developed areas. In relation to the present and the future it bases the population analysis on the developmental division of the world as published by one of the co-authors of this article. The article largely uses population estimates (with those referring to the past taken from Angus Maddison and those referring to the future from the most recent projections by the United Nations). Taking the 2013 UN projection as a model, it discusses three variants for demographic development in the North and South up to 2100. It argues that the more restrictive population growth variants of the UN projection predict a greater relative ‘Third Worldisation’ of the world than does the most dynamic projection.     

Development of a Novel Finger-Trigger Interface for Trigger Pull Measurement

Trigger pull is the force that needs to be exerted on the trigger to discharge a firearm. The measurement of trigger pull can assist in the evaluation of the safety, function, and manufacturing characteristics associated with a firearm during the forensic firearm examination process. Nonetheless, the accuracy and uncertainty of trigger pull measurements may be affected by the measuring device, test procedure, and environmental conditions. In this work, an innovative finger-trigger interface device was developed to facilitate accurate trigger pull measurements. The idea was to reduce the variation related to the position of the measurement device on the trigger in existing measuring methods and devices. Three force sensors based on different technologies were initially evaluated. While two of the three sensors failed to produce data, the miniature capacitive plate sensor exhibited high precision and a linear response over the range of typical trigger pulls. To examine the effects of the finger-trigger interface on trigger pull measurement, different sensor housing prototypes were designed in silico and 3D printed for the construction of three finger-trigger interface devices. The performance of each finger-trigger interface device was evaluated by measuring the trigger pulls of several selected firearms and comparing the data to a previously published study. Our preliminary results demonstrated the novel finger-trigger interface device offered a new way to measure trigger pull in situ with acceptable accuracy and precision.     

Corporate policy entrepreneurship and cross-boundary strategies: How a private corporation champions mobile healthcare payment innovation in China?

The private nature of corporate actors does not necessarily preclude them from contributing to public interest. When business strategies and genuine public motivation are favorably aligned, corporate actors from the private sector can also drive public sector innovations. For a private corporation, policy entrepreneurship inherently entails crossing not only the public–private boundary but also various policy domains. This study formulates five propositions to characterize the cross-boundary strategies of corporate policy entrepreneurship, a distinct form of policy entrepreneurship in a developing authoritarian state. The case study of mobile healthcare payment innovation in China finds that the corporate entrepreneur used a series of cross-boundary strategies adeptly that eventually made the innovation not only adopted in one locality but also rapidly diffused nationwide. These strategies were not used in isolation or in a pure stepwise fashion but appeared to be recursive and interactive, suggesting the dynamic nature of corporate policy entrepreneurship in a multilevel governance system. More studies could be done to further examine strategies and processes of other forms of policy entrepreneurship in various national and sectoral settings.     

Diffusion models over the life cycle of an innovation: A bottom-up and top-down synthesis approach

The diffusion models tend to be tested individually in isolation and remain the same over time for the studied innovations in the literature. Moreover, there is growing interest to learn from other countries in our current age of globalization. Therefore, this paper chooses the innovation of public resources trading platforms in China to fulfill above literature gaps. We have examined key events and the issuances of related laws and regulations by Chinese governments. Our contributions are twofold: (a) Our analysis and results show that the diffusion models evolve over the different stages of a life cycle of an innovation, contrasting to the literature results that diffusion models remain the same for their studied innovations. Due to major diverse characteristics among different adopter categories over a life cycle of an innovation, we argue that it is appropriate and necessary to apply different diffusion models on different adopter categories, which is missing in the current literature. (b) We find a first bottom-up and then top-down synthesis approach as an effective, efficient diffusion process for both fitting local needs (i.e., effective) and adopting innovations rapidly nationwide (i.e., efficient).     

Fatal Methemoglobinemia Due to Acute Inhalation of Methyl Nitrite in an Industrial Accident

Methyl nitrite is suggested to cause methemoglobinemia by generating methemoglobin, which may be lethal when the methemoglobin concentration exceeds 70%. However, intoxication with methyl nitrite is seldom reported compared with that with other nitrites. Here, we present an industrial accident involving methyl nitrite inhalation during its synthesis process that resulted in three fatalities and one survivor. The autopsy revealed conspicuous blue-gray discoloration in various parts of the body, including the skin, airway mucosa, vessels, brain, heart, and among other areas. The toxicological tests on the deceased showed methemoglobin concentrations in the blood over the lethal level and increased nitrite ion levels in the blood, gastric contents, liver, and lung tissue compared with those in control samples. The cause of death was determined to be methemoglobinemia-induced hypoxia due to methyl nitrite inhalation. This report provides evidence that in methyl nitrite intoxication, exposure duration has a significant influence on the postmortem changes and likelihood of a fatal outcome may be related to the age of the victim. More attention is required regarding the industrial hazards of this substance.