基于DEA模型的汽车产业集群的效率研究

本文利用数据包络分析法的CCR和BBC模型,对我国长三角等六个主要汽车产业集群及六大汽车企业集团的效率进行了实证分析。结果表明,这六个主要汽车产业集群的效率是不相同的,并由此提出了若干政策建议。     

Intentional mixed buccal cell reference sample in a paternity case

We report a case where an alleged father (AF) attempted to substitute someone else's saliva sample for his reference sample in a paternity analysis. Buccal cells were collected from the AF and the child, and DNA analysis was performed using an autosomal STR loci (Identifiler). The profile from the AF showed extra peaks in some loci, as well as a much higher "X" allele peak relative to the "Y" allele peak at the amelogenin locus. After conducting reanalysis by another technician with another set of positive and negative controls, it was concluded that the only source of the mixed profile was by intentional introduction by the AF, at the time of sampling, of some foreign human biological material, most likely saliva from a woman. Owing to the inconclusive results, when the AF was called back to the lab and the peculiar results were explained to him, he admitted that he had introduced into his mouth saliva from another person in an attempt to be excluded as the father of the child. Although tampering with DNA reference samples is not common, some individuals may attempt to contaminate or otherwise adulterate specimens before DNA tests. Personnel responsible for sampling should be aware of this possibility and should try to establish procedures to avoid the problem.     

Age estimation by a dental method: a comparison of Lamendin's and Prince & Ubelaker's technique

Lamendin et al. (J Forensic Sci 1992;37:1373) developed a general technique to estimate age of adults at death using two dental features: periodontosis and translucency of the tooth root. Prince and Ubelaker (J Forensic Sci 2002;47:107) modified this method, creating a formula for each sex and for different ancestries, and obtained more precise age estimations. In the present study, the validity of each method was tested in 45 males and 34 females of Spanish Caucasian origin, and a novel formula, based on Prince and Ubelaker method, was specifically developed for a population of mixed racial origin (mestizo) from Colombia, and findings obtained were again compared with those yielded by Lamendin adult dental aging technique. The Prince and Ubelaker method proved more accurate than the Lamendin technique in the Spanish Caucasian population, and our Prince and Ubelaker-based formula was also more accurate than the Lamendin et al. In both populations, the Lamendin method showed a higher mean error in estimations of the age of youngest and oldest individuals. These findings confirm the need to create specific formulas for each human group in order to obtain more accurate age estimates.     

Speech Watermarking: An Approach for the Forensic Analysis of Digital Telephonic Recordings*

Abstract: In this article, the authors discuss the problem of forensic authentication of digital audio recordings. Although forensic audio has been addressed in several articles, the existing approaches are focused on analog magnetic recordings, which are less prevalent because of the large amount of digital recorders available on the market (optical, solid state, hard disks, etc.). An approach based on digital signal processing that consists of spread spectrum techniques for speech watermarking is presented. This approach presents the advantage that the authentication is based on the signal itself rather than the recording format. Thus, it is valid for usual recording devices in police‐controlled telephone intercepts. In addition, our proposal allows for the introduction of relevant information such as the recording date and time and all the relevant data (this is not always possible with classical systems). Our experimental results reveal that the speech watermarking procedure does not interfere in a significant way with the posterior forensic speaker identification.     

高校创业教育社会经济效果的微观分析

高校创业教育能够有效地培养受教育者的创业精神,提升其创业技能,可以通过产业结构变迁作用于经济发展,可以通过提高受教育者的创业概率而产生福利改善效应.尽管高校创业教育产生了积极的社会经济效果,但它的作用仍有待于得到社会各界的认可.     

十二生肖动物词群的词义分析

汉语中存在大量与十二生肖动物有关的词和相当于词的固定结构,它们是一类特殊的词义类聚。十二生肖动物词群的词义,既源自动物的自然属性,又源自汉民族的神话传说、文学作品和民俗心理。其语义特点是：词义引申借助隐喻手段、意义系统呈现有规律的发散状网络构成、意义与汉民族“托物寓情”的思维模式紧密相关。     

继承权放弃相关问题之探析

实践中绝大多数的继承纠纷源于继承人对遗产的争夺,但是放弃继承在实践中亦不鲜见,是继承法律制度研究的一项重要内容。我国关于继承权放弃的立法较为抽象和原则,实务中缺乏可操作性,有必要对继承权放弃的相关理论与实务问题进行阐述和探讨。     

Responding to the Structural Violence of Migrant Domestic Work: Insights from Participatory Action Research with Migrant Caregivers in Canada

This study explores international domestic workers’ response to employer abuse and exploitation following changes to Canada’s Live-in-Caregiver Program in 2014. This research followed an interpretive policy analysis research design, using feminist, participatory, and action research methods. University-based researchers, advocates, and peer researchers collaborated to develop and implement the project’s research and advocacy goals. Thirty-one caregivers in Toronto and Calgary participated in individual and/or focus group interviews to discuss access to permanent residence, working conditions and forms of support. Many shared examples of labor exploitation and psychological hardship due to precarious work conditions and long periods of family separation. Barriers to accessing services and fear of losing status led the majority of caregivers to rely primarily on informal networks for mutual aid and support. This paper identifies how changes in Canada’s temporary foreign worker program for live-in-caregivers exacerbates the structural violence of migrant care work, where the risk for abuse, exploitation, and risk of losing status is normalized. Migrant caregivers accept the precarious work conditions with the promise of permanent residence and the chance to improve their lives for themselves and their children. Towards envisioning improvements in social service delivery, our research highlighted the need for social services to increase outreach and safety planning for migrant workers who are vulnerable to abuse, exploitation, and the loss of legal immigration status. Our research also supports grassroots advocacy to call for all migrant workers to be granted permanent resident status upon arrival to ameliorate the structural violence of migrant labor.