Powder X-ray diffraction (PXRD) is used widely in forensic science laboratories with the main focus of qualitative phase identification. Little is found in literature referring to the topic of validation of PXRD in the field of forensic sciences. According to EN ISO/IEC 17025, the method has to be tested for several parameters. Trueness, specificity, and selectivity of PXRD were tested using certified reference materials or a combination thereof. All three tested parameters showed the secure performance of the method. Sample preparation errors were simulated to evaluate the robustness of the method. These errors were either easily detected by the operator or nonsignificant for phase identification. In case of the detection limit, a statistical evaluation of the signal-to-noise ratio showed that a peak criterion of three sigma is inadequate and recommendations for a more realistic peak criterion are given. Finally, the results of an international proficiency test showed the secure performance of PXRD. 相似文献
Verbundförmig durchgeführte Verwaltungsverfahren im europäischen Mehrebenenverwaltungssystem nehmen zunehmend komplexere Gestaltungsformen an, was weitreichende Auswirkungen auch auf den Rechtsschutz Betroffener hat. Der vorliegende Beitrag untersucht am Beispiel des europäischen Naturschutzrechts, welche Rechtsschutzmöglichkeiten betroffene Grundstückseigentümer in verbundförmig durchgeführten Verwaltungsverfahren offen stehen. Dabei wird deutlich, dass ein kohärentes Rechtsschutzsystem durchaus vorhanden ist, wenngleich seine Inanspruchnahme nicht unerhebliche Schwierigkeiten aufwirft.相似文献
i. Islamic Bindings & Bookmaking: A Catalogue of an Exhibition, The Oriental Institute, The University of Chicago, May 18 — August 18, 1981. By Gulnar Bosch, John Carswell and Guy Petheridge. Chicago, 1981. pp.xii, 235, 177 photographs, 15 colour plates, 15 figures. $40.OO (hard cover), $20.00 (soft cover) plus postage and handling charges (foreign surface mail $3.10 and £2.80 respectively). Inquiries and orders to: The Oriental Institute (Attn.: Museum Office), 1155 E. 58th St., Chicago IL 60637, USA.
ii. A Book World Directory of the Arab Countries, Turkey and Iran. Compiled by Anthony Rudkin and Irene Butcher. London, Mansell/Detroit, Gale, 1981. pp.xiv, 143.
iii. Islamic Revolution or Revolutionary Islam in Iran, A Selected and Annotated Bibliography of Political Publications from the Overthrow of the Shah until his Death. By Wolfgang Behn. Berlin, “Ayidok”, 1980. pp.118.
iv. A Brief Guide to Sources for the Study of Afghanistan in the India Office Records. By Lesley Hall. London, India Office Library and Records, 1981. pp.v, 60. £4.00.
v. Scholars’ Guide to Washington, D.C. for Middle Eastern Studies. Egypt, Sudan, Jordan, Lebanon, Syria, Iraq, the Arabian Peninsula, Israel, Turkey, Iran. (Scholars’ Guide to Washington, D.C, No.7) . By Steven R. Dorr. Washington, D.C., Woodrow Wilson International Center for Scholars, Smithsonian Institution Press, 1981. pp.xiii, 540,2. $27.50 (cloth), $12.5O (paper). 相似文献
The number of reports on contact shots from firearms with a flash suppressor attached to the muzzle is small. On the basis of a case report (suicidal shot to the forehead with a Kalschnikow AKMS 47 assault rifle) the morphological peculiarities (characteristics soot pattern, relatively small powder cavity and only minor skin tears in the presence of a bony support) are presented and the conclusions to be drawn from the findings regarding the flash-suppressor, the shot distance, the angle of the shot and the way of holding the weapon are discussed. 相似文献
Following clinical observations in this study a comparison was undertaken between nonsexualized rapists, sexualized rapists, and pedophilic child molesters in terms of psychometric measures, criminological data, and DSM-IV diagnoses following the authors' hypotheses that nonsexualized and sexualized rapists differ in respect of psychiatric comorbidity and criminal history and sexualized rapists and pedophilic child molesters are more similar as regards to psychiatric comorbidity (anxiety, depression, and aggression) and criminal history variables than nonsexualized and sexualized rapists are. Preliminary findings confirmed the hypotheses: the authors found significant differences between paraphilic and sexualized sex offenders on one hand--regardless whether they had offended against minors or adults--and a group of sex offenders exhibiting a history of high lifestyle impulsivity on the other hand. From a psychiatric clinical point of view, paraphilic or sexualized rapists could be shown to resemble more the pedophilic child molesters. Therapeutic approaches should take these findings into account. 相似文献
The essay discusses three research perspectives in the post Cold War era, namely the prospects of European Integration, the future of the Constitutional State and the stability of both international and domestic political institutions. Geopolitical issues of hegemony and hegemonic stability in Europe, the erosion of the state as the sole legitimate coercive power, public awareness of constitutional values and related ethics, the contingencies of institutional behaviour and related prerequisites of political leadership are presented as relevant though currently under-researched topics. 相似文献
In a recent paper, Scholten and Thum (1996) analyze the impact of a pay-as-you-go (PAYG) pension system with a fixed replacement ratio on the immigration policy in a democracy. We extend the analysis of median voter's choice in two respects. First, in contrast to Scholten and Thum (1996) who assume myopic voting behavior, our paper considers fully rational agents and provides a solution under this more complex behavioral assumption. Voting with rational agents yields a more liberal immigration policy than with myopic voters. Second, we examine a different decision structure with a fixed contribution rate to the pension system. In this case the majority rule leads to a completely different solution. 相似文献