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51.
With increasing frequency, relatively small, fragmentary evidence thought to be osseous or dental tissue of human origin is submitted to the forensic laboratory for DNA analysis with the request for positive identification. Prior to performing DNA analysis, however, it is prudent to first perform a presumptive test or "screen" to determine whether the questioned material may be eliminated from further consideration. When material is shown not to be consistent with bone/teeth, DNA testing is not performed. When such determinations cannot be made from gross morphological features, elemental analysis can be indicative. This presumptive test is made possible by applying scanning electron microscopy/energy dispersive X-ray spectroscopy (SEM/EDS) in conjunction with an X-ray spectral database recently developed by the FBI laboratory. This database includes spectra for many different materials including known examples of bone and tooth from many different contexts and representing the full range of taphonomic conditions. Results of SEM/EDS analysis of evidence can be compared to these standards to determine if they are consistent with bone and/or tooth and, if not, then what the material might represent. Analysis suggests that although the proportions and amounts of calcium and phosphorus are particularly important in differentiating bone and tooth from other materials, other minor differences in spectral profile can also provide significant discrimination. Analysis enables bone and tooth to be successfully distinguished from other materials in most cases. Exceptions appear to be ivory, mineral apatite, and perhaps some types of corals. 相似文献
52.
This article uses four models to identify the best predictors of state poverty levels and changes in state poverty rates since the implementation of welfare reform. The policy decisions based on the Personal Responsibility and Work Opportunity Reconciliation Act (PRWORA) by the states are tested along with more traditional variables identified in the literature. Using several measures of state poverty, the analysis finds that those states with the lowest poverty rates are those with the healthiest economies, and the most generous state spending on Temporary Assistance for Needy Families (TANF). States with the highest percentage of their TANF rolls made up of black citizens tend to have the highest rates of poverty. Initial poverty rates are found to be important in that states with higher initial poverty levels are capable of generating a larger reduction in poverty than states with lower initial rates. With the exception of limited evidence on sanctions, none of the PRWORA–based policies were found to have any effect on poverty rates. 相似文献
53.
54.
The supply of enrollments in higher education has receivedrelatively little attention in both theoretical and empiricaleconomic research. To address this, we formulate and test amodel of the supply of enrollments in higher education inwhich administrators are modeled as utility maximizingbureaucrats. We find evidence that individual presidents andprovosts have a significant effect on enrollment supply andfaculty demand in a panel of eleven public colleges anduniversities in Maryland from 1988 to 1996, implying thatinstitutions have enough market power to permit thepreferences of administrators to influence enrollment supplyand faculty demand. 相似文献
55.
Constitutional questions have resurfaced in the last few years with regard to the European Union. The Maastricht Treaty is a kind of constitutional reform. The rejection of this treaty by Denmark in its first referendum, and the subsequent debate of the treaty that has taken place, raise questions about both the nature of the European Union, and the process by which its rules (constitution) get revised and approved. Similar questions surround the entry of Austria and the three, additional Scandinavian countries into the Union. Perhaps, no event called the European Union's constitution, or lack thereof, into question more that way in which a new President of the Commission was chosen during the summer of 1994. This paper will reexamine the European Union's structure and procedures from a constitutional perspective. Drawing upon the author's recently completed book, Constitutional Democracy, the paper will review the purpose for the Union's existence, the implications of this purpose for the structure of the Union (federalism versus confederation), the rules for making collective decisions in the Union, citizenship, and in particular, the procedures by which the European Union's “Constitution” is written and revised. The constitutional perspective adopted is taken from public choice. The political institutions of the European Union are examined relative to those rational, self-interested individuals would choose to advance their interests. 相似文献
56.
Using synthesis and an integrative approach, the article analyzes laws, policies, and institutions that protect the rights and promote the welfare of orphaned children in the Philippines. The article undertakes an exploratory review of the potential and contemporary impacts of colonialism, imperialism, feudalism, and capitalism on child and youth welfare and describes the conditions and difficulties Filipino children face in the current policy environment. To address these conditions and difficulties, the article offers a synthesis of potential and ongoing policy-capacity solutions in orphan and youth care, such as implementing a strong social supporting structure to grandparents as first caregivers, strengthening a mixed welfare system on orphan care, and legislating a national orphan policy. 相似文献
57.
Why did tax reform succeed in gaining passage while the family assistance plan failed? Using cultural theory, we argue that the active consent of elites from three political cultures is required before radical policy proposals will win political support in America. Although the Nixon administration cast the income maintenance plan in integrative terms—support for the family—it failed because egalitarian leaders demanded more. Tax reform succeeded because elites of the three cultures—individualists, egalitarians, and supporters of hierarchy—saw benefits in the plan and were willing to compromise. 相似文献
58.
Belinda Rodgers McCarthy 《American Journal of Criminal Justice》1979,4(2):16-29
Home furloughs are widely recognized as serving valid correctional aims. This was not always the case: when temporary release
programs were first established, prevailing penal philosophy emphasized isolation from the community and institutional efforts
to achieve inmate reform. It was not until penologists began to address the offender’s post-release adjustment difficulties
that temporary release came to be viewed as a valuable aid to offender rehabilitation. Today, the graduation of release that
home furloughs can provide make temporary release programs a routine and valuable aspect of correctional programming.
Home furloughs can serve a variety of correctional objectives in addition to their principal function of facilitating inmate
readjustment to the community. Temporary respites from confinement may humanize the prison experience and promote therapeutic
goals. Home visits may act as incentives for good inmate behavior and may serve broader aims than those addressed by more
narrowly focused conjugal visiting programs. Finally, observations of the offender’s performance on furlough may assist parole
officials in evaluating an offender’s readiness for release.
Although the future of temporary release programs is unclear, it appears that the multitude of functions served by home visits
will insure their place in correctional programming. However new influences on correctional managers, such as the reforms
proposed in the “justice model for corrections,” will undoubtedly modify the administration of temporary release programs
and may well lead to some unanticipated consequences for the correctional community. 相似文献
59.
Johnson RD Lewis RJ Canfield DV Dubowski KM Blank CL 《Journal of forensic sciences》2005,50(3):670-675
Specimens from fatal aviation accident victims are submitted to the FAA Civil Aerospace Medical Institute for toxicological analysis. During toxicological evaluations, ethanol analysis is performed on all cases. Care must be taken when interpreting a positive ethanol result due to the potential for postmortem ethanol formation. Several indicators of postmortem ethanol formation exist; however, none are completely reliable. The consumption of ethanol has been shown to alter the concentration of two major serotonin metabolites, 5-hydroxytryptophol (5-HTOL) and 5-hydroxyindole-3-acetic acid (5-HIAA). While the 5-HTOL/5-HIAA ratio is normally very low, previous studies using living subjects have demonstrated that the urinary 5-HTOL/5-HIAA ratio is significantly elevated for 11-19 h after acute ethanol ingestion. Recently, our laboratory developed and validated an analytical method for the simultaneous determination of both 5-HTOL and 5-HIAA in forensic urine samples using a simple liquid/liquid extraction and LC/MS/MS and LC/MS/MS/MS. In this previous work a 15 pmol/nmol serotonin metabolite ratio cutoff was established in postmortem urine, below which it could be conclusively determined that no recent antemortem ethanol consumption had occurred. In the current study this newly validated analytical method was applied to five ethanol-positive aviation fatalities where the origin of the ethanol present could not previously be conclusively determined. In four of the five cases examined the detected ethanol was demonstrated to be present due to postmortem microbial formation, and not consumption, even though some indication of ethanol consumption may have been present. 相似文献
60.