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411.
Wieland DM Halter MJ Levine C 《Journal of psychosocial nursing and mental health services》2012,50(2):17-21
Psychoactive bath salts are a relatively new group of designer drugs sold as tablets, capsules, or powder and pur-chased in places such as tobacco and convenience stores, gas stations, head shops, and the Internet. Bath salts are stimulant agents that mimic cocaine,lysergic acid diethylamide, methamphetamine, or methylenedioxymethamphetamine (ecstasy). The most common bath salts are the cathinone derivatives 3,4-methylenedioxypyrovalerone(MDPV), 4-methylmethcathinone(mephedrone), and 3,4-methylenedioxy-N-methylcathinone (methylone). The drugs cause intense stimulation, eu-phoria, elevated mood, and a pleasurable "rush" Tachycardia, hypertension,peripheral constriction, chest pain, hallucinations, paranoia, erratic behavior,inattention, lack of memory of substance use, and psychosis have been observed in those who have used bath salts. The U.S. Drug Enforcement Administration recently exercised an emergency authority to name three key ingredients in bath salts as Schedule I, thereby making them illegal to possess or sell in the United States. Nursing implications related to both clinical and educational settings are discussed. 相似文献
412.
Asian American ethnic identification by surname 总被引:17,自引:0,他引:17
Few data sources include ethnicity-levelclassification for Asian Americans. However, it isoften more informative to study the ethnic groupsseparately than to use an aggregate Asian Americancategory, because of differences in immigrationhistory, socioeconomic status, health, and culture. Many types of records that include surnames of personsoffer the potential for inferential ethnicclassification. This paper describes the developmentof surname lists for six major Asian American ethnicgroups: Chinese, Japanese, Filipino, Korean, AsianIndian, and Vietnamese. The lists were based on SocialSecurity Administration records that include countryof birth. After they were compiled, the lists wereevaluated using an independent file of census records.The surname lists have a variety of applications forresearchers: identification of individuals to targetfor study participation; inference of ethnicity indata sources lacking ethnic detail; andcharacterization of the ethnic composition of apopulation. 相似文献
413.
Diane J. Macunovich 《Journal of population economics》1999,12(2):215-272
Using two different measures of relative cohort size – one indicating the size and placement of an individual's own birth
cohort, and the other, the ratio of young to prime age adults in the United States in that year – it has been possible to
isolate strong effects of the population age structure on wages in the United States over the past thirty-three years. These
effects have been strong enough that virtually all of the observed change in the experience premium, and a substantial proportion
of the changes in the college wage premium, can be explained by the relative cohort size variables alone. Even changes in
the amount of within-group variance in wages appear to be largely a function of changing age structure, and absolute wage
levels have been strongly affected by these demographic changes, suggesting that population growth can have positive effects
on the economy.
Received: 27 January 1998/Accepted: 6 June 1998 相似文献
414.
Cet article présente la plus grande recherche canadienne qui ait été consacrée aux femmes et au harcèlement sexuel dans le milieu du travail (N= 1990), en étudiant la frequence des différentes formes de harcèlement ainsi que les détails de ces expériences, fournis par un sous-échantillon (n= 424). Dans le cadre de cette recherche, les femmes décrivent leurs réactions à l'égard du harcèlement et ses effets sur leur travail et dans leur vie personnelle. Le but de cet article est d'étudier le lien entre les caractéristiques du harcèlement et ses répercussions. Les résultats permettent de discuter les implications susceptibles de servir à bâtir une théorie sur le harcèlement, particulièrement la façon dont la theorie sur le pouvoir organi-sationnel peut contribuer à notre compréhension des conséquences du harcèlement au travail. This paper describes the largest Canadian survey devoted to women's experiences with workplace sexual harassment (N= 1,990) including the incidence of various types of harassment and details about these experiences provided by a sub-sample (n= 424). These women described their responses to the harassment and how it affected their work and personal lives. The analyses explore the relationship between characteristics of the harassment and its consequences. The findings are used to discuss theoretical implications, particularly with respect to how organizational power theory can contribute to our understanding of the consequences of workplace harassment. 相似文献
415.
Potvin D DiLiberti CE Hauck WW Parr AF Schuirmann DJ Smith RA 《Pharmaceutical statistics》2008,7(4):245-262
The planning of bioequivalence (BE) studies, as for any clinical trial, requires a priori specification of an effect size for the determination of power and an assumption about the variance. The specified effect size may be overly optimistic, leading to an underpowered study. The assumed variance can be either too small or too large, leading, respectively, to studies that are underpowered or overly large. There has been much work in the clinical trials field on various types of sequential designs that include sample size reestimation after the trial is started, but these have seen only little use in BE studies. The purpose of this work was to validate at least one such method for crossover design BE studies. Specifically, we considered sample size reestimation for a two-stage trial based on the variance estimated from the first stage. We identified two methods based on Pocock's method for group sequential trials that met our requirement for at most negligible increase in type I error rate. 相似文献
416.
417.
Richardson D 《The British journal of sociology》2010,61(4):737-756
This article seeks to extend understandings of heterosexual masculine identities through an examination of young men's constructions of what motivates young men to engage in heterosexual practices and relationships, and what not having sex might mean for them. Using the masculinity literature and work on heterosexuality to frame the discussion and to contextualize the findings, it explores the complex dynamics that frame the relationship between masculinity and heterosexuality. Specifically, how dominant or 'hegemonic' discourses of heterosexuality shape young men's identities, beliefs and behaviour. It considers these questions using empirical data from a qualitative study of young people living in close-knit working-class communities in the North East of England, with a specific focus on cultural and social attitudes towards sexuality and sexual practices. Peer group networks are a key site for the construction and (re)production of masculinity and, therefore, an important arena within which gendered social approval and acceptance is both sought and gained. In this article, I explore the reasons why young men engage in specific types of heterosexual practice in order to gain social approval. A central question is the extent to which heterosexuality is compelling for young men. That young men do feel compelled to behave in certain ways sexually, behaviours that they may be uncomfortable with and/or dislike, and the fact that they feel they are restricted in terms of how they can talk about their experiences within their peer group networks, demonstrates the power of dominant discourses of masculinity in everyday life. This is addressed through an examination of the restrictive effects of normative discourses about male heterosexuality, including their privatizing effects, which suggest that youth masculinities are often experienced in ways that are highly contradictory requiring young men to adopt a range of strategies to deal with this. 相似文献
418.
419.
Shannon DW 《Physician executive》2008,34(1):6-11
Examine the emerging trend of price transparency in health care and learn what some states are doing to make prices widely available on the Web. 相似文献
420.
Social bookmarking, repositories, networking, and other Web 2.0 technologies have the capacity to engage enormous numbers of ordinary people in networking, sharing, and working with digital resources. The Faculty of Education at The University of Hong Kong has been pioneering new educational applications. Through grants from the University we have developed a social bookmarking and repository system based on Web 2.0 ideas. RISAL—Repository of Interactive Social Assets for Learning has an unrealized potential to support teaching and learning at the University level. It is designed to facilitate and encourage sharing and collaboration of teachers and students with similar interests or learning foci across levels and programs. This form of learning support builds on and encourages the Web 2.0 culture of social networking and contribution of the individual to the community. In addition, the system is designed to incorporate compliance with Hong Kong's Copyright Ordinance (Creative Commons). The authors discuss the RISAL and describe its features and benefits that this system can offer to teaching and learning. 相似文献