Does price really converge among provinces in Canada？ A study using unit root tests for cross-sectional panels

This paper examines price convergences across different provinces in Canada using 1983-2006 data. We adopt the new panel unit root tests for analysis that can correct for cross-sectional correlation. Our findings are contrary to previous studies and we conclude that intra-national price convergence does not occur. We also briefly discuss the reasons for the absence of convergence within Canada.     

Comparison of glass fragments using particle-induced X-ray emission (PIXE) spectrometry

A procedure has been developed to analyze the trace element concentrations in glass fragments using particle-induced X-ray emission (PIXE) spectrometry. This method involves using accelerated protons to excite inner-shell electronic transitions of target atoms and recording the resultant X-rays to characterize the trace element concentrations. The protocol was able to identify those glass fragments that originated from different sources based on their elemental analyses. The protocol includes specific approaches to calculating uncertainties and handling measurements below the level of detection. The results indicate that this approach has increased sensitivity for several elements with higher atomic number compared with X-ray fluorescence methods. While not as sensitive as laser-ablation or inductively coupled plasma mass spectrometry methods of dissolved samples, it is entirely nondestructive and entails a much simpler sample preparation process that may be used to presort glass fragments for more comprehensive elemental analysis. As such, the technique described may have a niche role in forensic glass analysis.     

A new dynamism in Sino-Japanese security relations: Japan's strategic use of foreign aid

Abstract

In November 2004 a Chinese nuclear submarine cruised into Japan's territorial waters near the Okinawa Islands. In response, the Japanese government dispatched several Japanese naval ships and planes to chase the Chinese submarine until it navigated into international waters. This event, which potentially could have become the first exchange of fire between Japan and China since the Second World War, illuminated increasingly problematic security relations between the two neighbouring countries in the twenty-first century. In fact, deterioration of Sino-Japanese security relations is not a recent phenomenon but has already been evident since the mid-1990s, when Japan imposed a series of economic sanctions on China. Between 1995 and 2000 Japan had suspended its foreign aid to China in protest against: China's nuclear weapons tests; China's large scale war game including the launch of missiles across the Taiwan Strait; and Chinese naval activities in disputed areas in the East China Sea. This article looks at Sino-Japanese security relations since the mid-1990s through three case studies of the aid sanctions imposed by Japan on China. It clarifies the domestic political and bureaucratic interests that motivated aid sanctions and determined the decision-making process leading to these sanctions. The article argues, that with certain politico-security interests, Japanese governments actively used foreign aid as a strategic instrument to counter provocative military actions by China in the East Asian region since the mid-1990s. Despite the limited influence that Japanese aid sanctions have actually had on Chinese military behaviour, Japan's strategic use of foreign aid has undeniably created a new dynamism in security relations between the two neighbouring great powers in Asia.     

Identification of Tool Marks of a Sickle on a Telephone Cable

Linkage of a cutting tool (a sickle) with a telephone cable of 100 pairs of copper wires is reported in a case of theft of a telephone cable. Telephone cables contain numerous insulated copper wires of small diameter inside an outer covering and are stolen for the relatively precious copper. The cutting pattern of the cable can only point to the type of the tool but because of the large number of copper wires, it is practically difficult to make a definite linkage with the tool used to cut the cable by comparing the tool marks. The present work reports the successful attempt of the authors in establishing a definite linkage of a stolen telephone cable with a sickle recovered from the suspects. Spot microchemical test was performed for detection of copper on the blade of the sickle, and then tool mark comparison was performed to link the tool marks on the metal strip inside the outer covering of the cable to the blade of the sickle.     

刑事化验常见化学概念辨析

刑事化验常涉及较多的化学理论知识。对常见的、容易混淆的、有联系又有区别的十六个化学概念进行辨析。     

心理测试技术与测谎

心理测试测试技木是一项新兴的刑事检验技术,而“测谎”则更多地出现在媒体上,为大众所广泛接受。“测谎”理论无法解释被测者在沉默状态下产生的情绪反应,而且容易引起被测者的反感,而心理测试技术理论,含盖了心理学中多方面的研究成果,已经从对谎言本身的探查中解脱出来。     

PICKING CHERRIES WITH BLINDERS ON: A COMMENT ON ERICKSON ET AL. (2007) REGARDING THE USE OF TESTS IN FAMILY COURT*

Erickson, Lilienfeld, and Vitacco's (2007/this issue ) review of the suitability and limitations of psychological tests invites legal and mental health professionals to rely on it as an objective guide for selecting, using, and admitting psychological tests in family court matters. Unfortunately, their discussion is marred by a pronounced bias in favor of multiscale, objective personality inventories and against performance‐based or projective instruments. This bias is evident not only in their unbalanced emphasis on the strengths of the former and weaknesses of the latter, but also in their use of selective citations and loaded language in launching what amounts to a polemical argument in support of tests that they favor. Their discussion of the Rorschach inkblot test is particularly misleading. This article refutes their unwarranted criticisms of the theoretical underpinnings of the Rorschach test, its research base, its norms, its interscorer reliability, the validity of its scores, and its admissibility in the courtroom. The value of multimethod assessments that include the use of direct clinical observation of performance under standardized conditions in custody evaluations is highlighted.     

物证鉴定的能力验证

能力验证是物证鉴定质量保障体系的重要组成部分,可以非常有效的评估、监控和提高实验室物证鉴定能力和质量。本文论述了物证鉴定能力验证的主要方法、形式、类型和特点,以及在物证鉴定实验室质量管理中的具体应用,介绍了国外物证鉴定实验室参加能力验证活动的历史和现状,并提出在我国物证鉴定实验室广泛开展能力验证活动的思考。     

The FDA and genetic testing: improper tools for a difficult problem

The US Food and Drug Administration (FDA) has recently issued draft guidance on how it intends to regulate laboratory-developed tests, including genetic tests. This article argues that genetic tests differ from traditional targets of FDA regulation in both product as well as industry landscape, and that the FDA''s traditional tools are ill-suited for regulating this space. While existing regulatory gaps do create risks in genetic testing, the regulatory burden of the FDA''s proposal introduces new risks for both test providers and patients that may offset the benefits. Incremental expansion of current oversight outside of the FDA can mitigate many of the risks necessitating increased oversight while avoiding the creation of new ones that could undermine this industry.     

Confirmation by LC–MS of drugs in oral fluid obtained from roadside testing

The aim of this study was to assess the effectiveness of two current on-site oral fluid (OF) drug detection devices (OraLab and Dräger), as part of the Spanish participation in the Roadside Testing Assessment Project (ROSITA Project). The study was done in collaboration with the Spanish Traffic Police, in Galicia (NW Spain), during 2004 and 2005. A total of 468 drivers selected at the police controls agreed to participate through informed consent. In addition, saliva samples were collected and sent to the laboratory to confirm the on-site results. For this purpose, two different analytical liquid chromatography–mass spectrometry (LC–MS) methods were used to detect 11 drugs or metabolites in a 300 μL sample. Simultaneous analysis of morphine, 6-acetylmorphine, amphetamine, methamphetamine, MDA, MDMA, MDEA, MBDB, cocaine and benzoylecgonine was carried out using 100 μL of oral fluid, after an automated solid phase extraction. A different LC–MS method was performed to detect Δ⁹-THC in 200 μL of oral fluid using liquid–liquid extraction with hexane at pH 6. Both methods were fully validated, including linearity (1–250 ng/mL, 2–250 ng/mL) recovery (>50%), within-day and between-day precision (CV < 15%), accuracy (mean relative error < 15%), limit of detection (0.5 and 1 ng/mL), quantitation (1 and 2 ng/mL) and matrix effect. All of the positive cases and a random selection of 30% of the negatives were analyzed for confirmation analysis. Good results (sensitivity, specificity, accuracy, positive predictive value and negative predictive value > 90%) were obtained for cocaine and opiates by OraLab, and for cocaine by Dräger. However, the results for the other compounds could be improved for both detection devices. Differences in the ease of use and in the interpretation mode (visual or instrumental) were observed.