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Photoluminescent semiconductor nanocrystals for fingerprint detection   总被引:2,自引:0,他引:2  
The concept of utilizing photoluminescent semiconductor nanocrystals for latent fingerprint detection, especially in concert with phase-resolved imaging for background fluorescence suppression, is reduced to practice with CdS nanocrystals that are capped with dioctyl sulfosuccinate. The nanocrystals are dissolved in heptane or hexane and are applied in much the same way as staining with fluorescent dye, on articles that have been pre-fumed with cyanoacrylate ester and also on the sticky side of electrical tape without pre-fuming. Since CdS can form a photoluminescent nanocomposite with dendrimers, a feasibility examination of dendrimer tagging of fingerprints has also been conducted.  相似文献   

4.
Laws in the UK and the USA protect college students with disabilities from discrimination. The laws of both nations are complex and require institutions of higher education to accommodate qualified students. This article examines the requirements of both nations’ laws with respect to the kinds of inquiries that may be made of students with disabilities, how the institution must go about determining what accommodations are needed, whether the needed accommodations are reasonable and consistent with academic standards or requirements, and whether the institution is required to attempt to accommodate undisclosed disabilities. The article also discusses how the laws in each nation are enforced, addresses the remedies that are available to students in both nations, and focuses on the interpretation of these laws with respect to admission, academic accommodations, nonacademic accommodations (such as housing, student discipline, and co-curricular activities). It also discusses the institution's duty to students with psychiatric disorders who may engage in self-destructive behavior.  相似文献   

5.
The article looks at the development of parliamentary institutions and procedures in Russia and the extent to which Russian politicians have been interested in learning from ‘mature’ democracies.

There are few examples of parliamentary practices being transplanted without significant adaptation. The debate in Russia on the role of parliament indicates that the idea of imitating foreign models has to compete with the powerful notion of rediscovering a national democratic tradition and both are used rhetorically to support particular interests. Parliamentary rules and practices are organically linked with party organisation, with the balance of parties at any given time, with electoral law, and with the relationship of the executive to the legislative branch. Changes in political habits take time.

International contacts are valuable because they lend confidence and authority to those who are working to build on democratic habits, but it is more important that parliamentarians and officials should find solutions which are internally consistent, which work with the grain of their own slowly evolving political culture and which reflect the most positive of their own traditions, than that they should assemble best practice from around the world.  相似文献   

6.
Probation officers are the focal point for most interventions with delinquent youths in the juvenile justice system. The present study examines probation strategies and interventions in a sample of 308 probation officers who completed the Probation Practices Assessment Survey (PPAS) in a web-based survey. The PPAS measures six probation approaches: deterrence, restorative justice, treatment, confrontation, counseling, and behavioral tactics. Structural equation models and latent class analyses showed that probation officers use multiple approaches with delinquent youths consistent with the balanced and restorative justice movement. Younger youths, high-risk youths, and youths with prior social service involvements are likely to receive more intensive interventions. The implications of these findings for improving probation practices with delinquent youth are discussed.  相似文献   

7.
A rapid, accurate, precise, reproducible, economical, and environmentally gentle method using capillary electrophoresis (CE) is presented for the routine analysis of methamphetamine, amphetamine, MDA, MDMA, MDEA, and cocaine in seized drugs. The methodology uses a 32 cm by 50 microm capillary (length to detector 23.5 cm) with a commercially available buffer kit and diode array UV detection. Dynamic coating of the capillary surface is accomplished by flushing with base for 1 min, a proprietary polycation for 1 min, and then a proprietary polyanion for 2 min. This approach provides a relatively high and stable electroosmotic flow (EOF), even at low pHs. The background electrolyte (BGE) contains 75 mM phosphate buffer (pH 2.5) with the same polyanion as above. Using this methodology, amphetamine, methamphetamine, MDA, MDMA, MDEA, and an internal standard (n-butylamphetamine) are baseline resolved in less than 5 min. The run-to-run migration time %RSDs and peak area %RSDs are typically <0.3% and <2.1%, respectively. The day-to-day and capillary-to-capillary migration time %RSDs are <1.5% and <2.1%, respectively. The %RSDs of the relative migration times compared with the internal standard on a day-to-day and capillary-to-capillary basis are <0.2% and <0.06%, respectively. The linear dynamic range using peak areas range from 0.003 to 0.10 mg/mL. The correlation coefficients are >0.9998, with all calibration curves passing at or near the origin. Similar data are obtained for cocaine and its internal standard henyltoloxamine. None of the compounds usually encountered in illicit samples interfere with the target compound (e.g., methamphetamine and cocaine) or the internal standard. Quantitative results for synthetic mixtures and seized exhibits are in good agreement with actual values, and also with results obtained from other techniques. The relatively high EOF for the dynamically coated capillary system allows for the screening of basic, acidic, and neutral adulterants in drug seizures; identification is facilitated by the use of automated UV library searches.  相似文献   

8.
The authors describe the results obtained using the scanning electron microscope (SEM) to study drowned lungs and control lungs. Results are compared with a previous study carried out using laboratory animals. The results from both studies are analogous, in the absence of chronic pulmonary emphysema. The diagnosis of chronic pulmonary emphysema is simple with the SEM even when dealing with autoptic material obtained 24 to 48 h after death, but the diagnosis of drowning becomes difficult in lungs with chronic emphysema.  相似文献   

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Abstract

This aper considers the scant literature in the field of child sexual abuse in Asian families, and reports the authors' involvement with four male Asian sexual offenders. The therapeutic approach used with the offenders is described, and clinical themes arising from their treatment are identified. Issues and difficulties in therapy are discussed, in particular personal issues arising for the therapists. It is concluded that Asian sexual offenders are a group who have been neglected in the literature and in treatment, partly, perhaps, because they are infrequently referred to treatment services in comparison with non-Asian sexual offenders. Particular therapeutic issues relating to the treatment of immigrant Asians who do not speak English are raised and further research needs are identified in relation to this patient group.  相似文献   

10.
Toxicological and forensic medical characteristics of capsaicinoids are presented. Capsaicinoids represent a mixture of three basic compounds with similar structure: capsaicine, dihydrocapsaicine, and nordihydrocapsaicine, all of which are the primary components of red pepper extract (Oleoresin Capsicum). The advantages of this group of irritants in comparison with synthetic irritants are discussed. Probable routes of administration of the extract with regard to its hazard for the organism are considered. Results of experimental studies on nonbiological phantoms and volunteers are presented.  相似文献   

11.
The fundamental objective of this paper has been to reinvestigate the relationship between employment and crime, while taking account of deterrence, age and race effects. The data, a sample of Brooklyn arrestees, was collected by the Vera Institute of Justice simply to explore, with individual data, the relationship between employment and crime. In this research, a labor theoretic formulation is used incorporating a model that views the problem as one of rational choice between legitimate work and participation in crime. Factors affecting the diminution of crime participation with age are investigated. Changes at age 18 in economic opportunities and in deterrence effects from moving from juvenile to adult status are found to have a significant impact on crime participation. The results are important because they tend to confirm with official crime report data, results found in earlier studies using self-report data, i.e., (1) when the process is appropriately modeled, previous contacts with police are found to cause some experimenters with crime to become desisters, (2) prior work experience and economic opportunities tend to reinforce this tendency to desist, (3) even though blacks are found to have a greater prevalence of involvement in crime, when the data are standardized for all of the aforementioned factors and educational attainment, there is no significant difference between blacks and whites in their tendency to recidivate.  相似文献   

12.
The quantitative results (accuracy and precision) for determination of opiates by radioimmunoassay (RIA), enzyme immunoassay (EMIT), and spectrofluorometry on split samples are compared. A variety of physiological samples were studied, including random urine from a methadone maintenance clinic and postmortem urine, blood, bile, brain, and lung tissue from heroin-induced or heroin-related deaths. The opiate concentrations detected by the two immunoassay methods were in good agreement with each other in the absence of interfering substances which are believed to react with the antimorphine antibodies. The immunoassay results were in agreement within the relative standard deviation with the fluorometry results in 55% of the urine samples and 80% of the blood samples. The immunological methods are superior to fluorometry for quantitation of morphine in urine samples due to quenching interferences in fluorometry from urine. They were comparable to fluorometry for quantitation of morphine in blood samples.  相似文献   

13.
The building industry is a sector characterised by a large number of opportunities to commit economic crime. In Sweden, the level of tax avoidance in the building trade is estimated to be substantial, and the use of black market labour extensive. This article focuses on the organised use of black market labour in the building industry, which may be described as a form of both economic and organised crime. To date only a very small number of criminological studies have examined the use of black market labour in this sector of the economy. The article focuses on two of the central roles found in the context of organised, black market labour: the “fixer” and the “criminal entrepreneur”. The fixer is an individual with expertise in the methods of economic crime. The criminal entrepreneur acts first and foremost as a link between a client and the manpower required by this client. In this paper, fixers and criminal entrepreneurs are studied on the basis of data from the Swedish Register of Suspected Offenders. The analysis shows that the networks of fixers and criminal entrepreneurs overlap one another to some extent. There are nonetheless a number of differences between the two groups and also between their respective networks. The networks of the fixers are larger than those of the criminal entrepreneurs, and the individuals that comprise the fixers’ networks are suspected in connection with much larger numbers of offences. The fixers more often commit offences together with others and also have larger numbers of suspected co-offenders than the criminal entrepreneurs. On the other hand, the criminal entrepreneurs are suspected of having maintained their ties to suspected co-offenders for longer periods of time than the fixers. The fixers appear to specialise in fraud and forgery offences, whereas motoring offences, smuggling and drug offences are more common among the criminal entrepreneurs. The networks are highly male-dominated and on balance they are comprised of much older individuals than those of traditional offenders. Many of the fixers and criminal entrepreneurs are suspected of committing offences with the same co-offender for a long period of time. Further out in the networks, co-offenders are replaced more often. Tax offences are very common in both types of network, both in those parts of the network that are close to the fixers and criminal entrepreneurs, and also in more distant parts of the networks. In the more distant parts of the networks, there is also an increase in the proportion of offences that individual network members are suspected of committing. Judging from the material examined in the current study, violent offences do not appear to be very common among either fixers or criminal entrepreneurs. The networks examined are largely comprised of individuals suspected of economic offences. These individuals are linked together with one another by means of direct and indirect contacts that produce semi-legal networks of individuals with knowledge of organised black market labour.
Anita HeberEmail:
  相似文献   

14.
This study compares Chinese and Western employers in Hong Kong in terms of their treatment of Filipina domestic helpers in four major areas: atmosphere of work environment, consideration, social psychological distance, and personal space. The data were based on in-depth and structured interviews, mainly with Filipina helpers who have served both types of employers. A few Chinese and Western employers were also interviewed. The findings indicate that the Filipina maids, in general, are more satisfied with their Western employers, who tend to provide them with an easier and more comfortable work environment; are more considerate; are more likely to treat them on equal terms; and to allow them more personal space. Within group variations in the treatment of maids are greater among Chinese employers than Western employers. This means that, in terms of the treatment of Filipina maids, Western employers in Hong Kong are more homogeneous and tend to concentrate on the positive side, whereas Chinese employers are more diversified.  相似文献   

15.
The purposes of this study were to assess (a) the extent of attrition in the processing of sexual assault cases in the legal systems, (b) factors associated with attrition at various stages in the process, and (c) victims' experiences in the legal system and the relations between these experiences and recovery. Our results suggest that substantial attrition continues to occur in the prosecution of rape cases, that more severe assaults are prosecuted more vigorously, that victims are generally satisfied with the police (but not with the legal system in general), and that neither attitudes nor case outcomes are associated with victims' postrape recovery. Research and policy implications are discussed.  相似文献   

16.
The objective of this study is to examine the social determinants of violent victimization, with the principal focus being directed at the significance of neighbourhood conditions. By combining data from victim surveys with information on the neighbourhoods in which the survey respondents live, we have been able to study both the individual and household characteristics, and also the factors specific to different neighbourhoods that are associated with violent victimization. What we are able to show is that the violence that occurs in the residential neighbourhood constitutes only a small fraction of the violent incidents to which people are exposed. Further, the violence that occurs within the neighbourhood takes place to a large extent within the victim's home. This suggests that exposure to violence is associated with neighbourhood conditions only to a limited extent. More detailed analyses of the violence that does occur within the neighbourhood show no effects of neighbourhood conditions when controls are included for individual and household characteristics. The conclusion, therefore, is that we are unable to find any clear neighbourhood effects in relation to violent victimization. The differences that we initially note between different types of neighbourhood in the proportions reporting exposure to violence are too a large degree the result of selection processes. These do not, however, in themselves increase the risk for violent victimization.  相似文献   

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The article analyses which parties support registered partnership and same-sex marriage bills in parliament in Western Europe. Existing comparative research indicates that left parties back same-sex union laws. This article shows that support is not limited to the left camp. Liberal and even Christian democratic parties have expressed above-average support as well, albeit with certain exceptions. The chief opponents of same-sex union laws are Protestant parties and the parties of the far right; in terms of numbers, however, both are largely insignificant. Far more relevant for these laws’ chances of success are the positions of the large parties at the centre and at the right of the political spectrum. The analysis reveals considerable inter-country differences in these parties’ attitudes, which can be explained to a large extent with the two-worlds-of-morality-politics distinction introduced by Engeli, Green-Pedersen and Larsen: countries in which centre and right parties continue to oppose same-sex union laws are part of the religious world, with the exception of France. The results for France indicate a need for further research.  相似文献   

19.
The central premise is that a significant amount of sex offending stems from unusual or inappropriate sexual preferences that appear in early adolescence, are relatively stable, and immutable. In those ways, they are like more ordinary sexual preferences, generating sexual impulses that are insistent. Individuals are strongly tempted to act on them, alternatives to satisfying them are unfulfilling, and complete long-term control of such impulses is unlikely. Yet, since individuals with sexual preferences for inappropriate objects or activities are neither morally nor legally permitted to act on them, they find themselves in a terrific bind. The public is, to some extent, correct to not trust the individuals with such preferences and to attempt to monitor or control them. However, most such efforts appear ineffective and counterproductive. Recidivist sex offenders are particularly worrisome. The possibility of voluntary castration for such offenders, in lieu of preventive detention or other more restrictive measures, is explored.  相似文献   

20.
This article explores the status of crime among the American Indian population. Quantitative information regarding Indian offenses and arrest is presented and placed into the large spectrum of social problems afflicting Indian society. Some quantitative comparisons are made with a similar study conducted in 1964.Trend analyses were performed, and projections are provided relevant to total, adult, and juvenile Indian arrest; rates of arrest for Total, UCR Part I, and alcohol-related offenses are also given. Indian crime data are compared with those of other ethnic groups. The Indian propensity for arrests involving alcohol-related offenses is discussed in detail.The frequency of crimes on- and off-reservation is analyzed, particularly with respect to violent crimes; data are examined to determine the most frequent types of police contacts that Indian offenders experience.  相似文献   

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