安全化操作与美国全球供应链政策的战略性调适

2021年美国拜登政府施政伊始就推动了一系列关于供应链的新政策,特别是以“国家安全”为叙事手段强化国内产业政策,扶持先进制造业和新兴技术研发,并联合安全盟友构建关键产业国际供应链联盟。与特朗普政府相比,拜登政府的新供应链政策进一步强调了经济安全和国家安全并重的原则。对于这种政策转变的本质,相关研究出现了战略性转变和功能性转变等两种观点。从理论逻辑看,经济政策的安全化分析路径,可以剖析全球供应链的安全效应,明晰经济和安全策略组合的类型,从而进一步揭示美国新供应链政策“混合式安全化操作”的生成机制。从政策实践看,拜登政府针对供应链问题的安全化操作主要呈现两个新的特点,一是新冠肺炎疫情冲击之下的兼顾供应链安全与大国战略竞争,二是以国内投资重塑产业链,并配合国际运作以形成关键产业供应链联盟,从而对战略对手实施经济权术。这些新政策面临着战略利益和市场力量之间的张力,存在诸多制约,其带来的政策冲击也为后疫情时代全球经济的稳定和复苏增加了不确定性。     

中国的基础设施建设援助与国际发展援助的“共生”——援助国产业结构差异的视角

发展与援助在二战后的制度化结合是现代援助体系诞生的标志,对外援助的道德属性被框定为帮助受援国实现发展。但在现实中,西方和中国常质疑彼此的援助道德动机,前者认为后者的基建援助是"新殖民主义"、"债务陷阱",后者认为前者的软性援助人员费过高、口惠而实不至、干涉他国内政。本文尝试在国际政治经济学框架下,将对外援助决策的规范建构与理性选择双重属性理论化,发掘一国产业结构与对外援助政策间的关联性,以解释西方与中国对外援助的特征差异和误解来源。概言之,发展通过中间变量产业结构可以分解出发展理念、发展资源和发展压力等作用机制,影响一国对外援助的部门分配,因而工业国倾向基础设施与生产性援助,第三产业国则偏好投放专业服务类援助。在全球价值链分工视野下,中国对外援助的偏好和结构具备合理性和正当性,不同援助方的发展援助既会产生竞争,也可互补共生,共同推动联合国"2030愿景"和新型全球治理的实现。     

聚合酶链反应检测绵羊肺炎霉形体的研究

参照基因库中已发表的绵羊肺炎霉形体Y98株的 1 6SrDNA序列 ,设计合成了 1对引物 ,建立了聚合酶链反应 (PCR)检测绵羊肺炎霉形体的方法。结果显示 ,所建立的PCR能特异扩增绵羊肺炎霉形体的DNA ,而对照的菌株均为阴性 ;其敏感性可达 1pg。经对绵羊肺炎霉形体分离株HD 1的扩增产物进行测序 ,并与绵羊肺炎霉形体标准株Y98的 1 6SrDNA序列进行比较 ,发现有 6个碱基的差异     

Service Sector Productivity: B2B Electronic Commerce as a Strategic Driver

Information technology, and especially the Internet, are exerting an increasingly large and broad influence on industrial structures and measurement and evaluation of such fundamental concepts as risk, the value and benefits of intangibles such as intellectual capital, brand-related goodwill, and service sector productivity. Identifying the key value-adding factors underpinning productivity in the service sector has always been a significant challenge but with the advent of the WWW and the broad diffusion of Internet-enabled technologies and transacting modalities such as electronic commerce, this challenge has become even harder. In this paper, we compile a number of empirical case studies from industry where the use of electronic commerce has served as a strategic differentiator in pushing the service productivity envelop and in maximizing customer value added. Specifically, we examine the impact of electronic commerce on the process and petroleum industries. We profile in detail the role of electronic commerce as a strategy-enabling, infrastructural, path-breaking and general-purpose technology that if properly leveraged, can lead to radical improvements in both quality and productivity in services, thus helping re-define and re-shape the core structure and relationships in the industries it impacts. We end by identifying best practices in deploying electronic commerce as a strategic agent of change within and across firms and industries in the pursuit of increasingly higher levels of service sector productivity and quality.     

电子证据的相关问题

在美国，使用电子证据已经成为法庭上非常普遍的现象。陪审团审案时，试图使用电子证据的检察官要想使得初审法官采纳该电子证据必须克服一些阻碍。一些证据标准被设计来限制陪审团的事实发现过程。检察官可要求法院启动庭前审理程序来决定电子证据是否可以被采纳。建立一个电子证据保管链和专门处理电子证据的既定机构程序是检方工作的关键环节，这样能确保法庭调查中获得陪审团的信任。挑选能认同电子证据重要性的人员担任陪审团成员非常重要，同时还要避免选择那些想要根据自己专业知识来主导陪审团决议的人员。     

我国互联网灰色产业链分析及其法律应对措施

在互联网成为国家经济重要组成部分的同时,互联网上的各种灰色产业链也随之兴起而不断发展,对国家网络信息安全、互联网经济等带来不可忽视的影响,给法律上如何应对也带来了新的挑战。因此,研究分析当前主要互联网灰色产业链的流程、危害、特点等,采取相应措施,加强公民个人信息的法律保护,对推进我国整体信息安全法律体系建设具有重要意义。     

Powdered Activated Carbon: An Alternative Approach to Genomic DNA Purification

Forensic evidence samples are routinely found as stains on various substrates, which may contain substances known to inhibit polymerase chain reaction (PCR). The goal of this study was to evaluate post‐Chelex^®100 purification using powdered activated carbon (PAC). Mock crime scene DNA extracts were analyzed using quantitative PCR and short tandem repeat (STR) profiling to test the DNA recovery and inhibitor removal using PAC with those of the Amicon^®Ultra 100K. For extracted bloodstains on soil and wood substrates, PAC and Amicon^®Ultra 100K generated similar DNA yield and quality. Moreover, the two methods significantly decreased the concentration of humic substances and tannins compared to nonpurified extracts (p < 0.001). In instances where extracts contained indigo dye (bloodstains on denim), Amicon^®Ultra 100K performed better than PAC due to improved amplifiability. Efficient adsorption of humic substances and tannins, which are common inhibitors, indicates PAC's potential application in the purification of high‐template DNA extracts.     

Forensic Potential of MMPs and CC Chemokines for Wound Age Determination

In this study, we investigated time-dependent expression of matrix metalloproteases (MMP)-2, MMP-9, chemokine CC motif ligand (CCL)-2, CCL-3, CCL-5, IL-1β, IL-6, and TNF-α mRNA at the skin injury site and sought their forensic potentials during the skin wound repair process. The tested wound ages in 42 mouse skin wounds were distributed at 0d, 1d, 3d, 5d, 7d, 10d, and 14d, respectively and then followed by real-time polymerase chain reaction. Ultimately, MMP-2 played an important role in the inflammation phase. On the contrary, MMP-9 became involved at a later phase during wound healing. Meanwhile, CCL-2 and CCL-3 were active throughout almost all of the process. However, CCL-5 mRNA had no significance. Collectively, an MMP-9/MMP-2 ratio of over 0.84 indicated that skin wound healing age was strongly 5 days or less. So elevated gene expressions of cytokines and chemokines in different phases of wound ages implied that combined exploration could make wound age determination more accurate and objective.     

ABO位点限制性扩增片段长度多态性的研究

建立了PCR扩增、限制性酶切、8％（T）、5％（C）聚丙烯酸胺凝胶垂直电泳和银染检测ABO位点的限制性片段长度多态性的方法体系。应用Amp-RFLP技术对185名中国人（哈尔滨）ABO位点的基因频率和基因型分布进行了调查和统计分析。ABO位点特异片段长度为140～200bp，基因频率为0．2000～0．5568。6种基因型频率为0．973～0．3135，杂合度0．5838，Dp值0．7146。经H－W平衡吻合度检测，完全符合群体遗传多态分布。通过对11个家庭33名相关个体的分析，证明完全符合孟德尔遗传定律。ABO基因型检验适用于法庭科学的个体识别和亲权鉴定。