首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   37篇
  免费   0篇
管理学   6篇
人口学   1篇
社会学   30篇
  2023年   2篇
  2019年   1篇
  2017年   1篇
  2014年   2篇
  2013年   25篇
  2011年   1篇
  2010年   1篇
  2009年   1篇
  2007年   1篇
  1992年   1篇
  1982年   1篇
排序方式: 共有37条查询结果,搜索用时 15 毫秒
1.
Within 8 years, Gamblers Anonymous in Vienna evolved into a guidance center for gamblers and their relatives, with professional aid. It is a non-profit institution and the therapeutic team consists of one psychologist, one social-worker and one psychiatrist. The clients can remain anonymous, but about 90% of them reveal their identity. The treatment model integrating professional therapy and self-help is presented. The reasons we decided to base our work on an addiction model of pathological gambling are explained. All the clients consulting our center in 1990 (N=237) are described according to age, sex, types of gambling, duration of problem gambling, family status, profession, income, debts, and income/debt relationship. Finally, the treatment program of our center is presented.This article is an extension of the special issue on Gambling in Europe edited by Iver Hand, M.D.  相似文献   
2.
A class \(\mathcal{G}\) of simple graphs is said to be girth-closed (odd-girth-closed) if for any positive integer g there exists a graph \(\mathrm {G} \in \mathcal{G}\) such that the girth (odd-girth) of \(\mathrm {G}\) is \(\ge g\). A girth-closed (odd-girth-closed) class \(\mathcal{G}\) of graphs is said to be pentagonal (odd-pentagonal) if there exists a positive integer \(g^*\) depending on \(\mathcal{G}\) such that any graph \(\mathrm {G} \in \mathcal{G}\) whose girth (odd-girth) is greater than \(g^*\) admits a homomorphism to the five cycle (i.e. is \(\mathrm {C}_{_{5}}\)-colourable). Although, the question “Is the class of simple 3-regular graphs pentagonal?” proposed by Ne?et?il (Taiwan J Math 3:381–423, 1999) is still a central open problem, Gebleh (Theorems and computations in circular colourings of graphs, 2007) has shown that there exists an odd-girth-closed subclass of simple 3-regular graphs which is not odd-pentagonal. In this article, motivated by the conjecture that the class of generalized Petersen graphs is odd-pentagonal, we show that finding the odd girth of generalized Petersen graphs can be transformed to an integer programming problem, and using the combinatorial and number theoretic properties of this problem, we explicitly compute the odd girth of such graphs, showing that the class is odd-girth-closed. Also, we obtain upper and lower bounds for the circular chromatic number of these graphs, and as a consequence, we show that the subclass containing generalized Petersen graphs \(\mathrm {Pet}(n,k)\) for which either k is even, n is odd and \(n\mathop {\equiv }\limits ^{k-1}\pm 2\) or both n and k are odd and \(n\ge 5k\) is odd-pentagonal. This in particular shows the existence of nontrivial odd-pentagonal subclasses of 3-regular simple graphs.  相似文献   
3.
Abstract

Background: Young adults remain the earliest legal target for the tobacco industry. Against this, the existence of smoking policies would appear to offer some protection to students on campus. However, little research has been conducted into the outcomes of such policies from a student perspective. Methods: The authors conducted 8 focus groups at 4 selected Canadian undergraduate campuses to investigate student perceptions and behaviors resulting from campus smoking policies. Results: Results indicated that student smoking behaviors are minimally impacted by campus smoking policies due to seriously compromised implementation and enforcement. Conclusions: These findings imply that the presence of campus smoking policies and claims of “smoke-free” campuses should not be misinterpreted as achievement and without renewed focus and adequate tobacco control infrastructure, it will remain possible for young adults to initiate and maintain tobacco smoking on campus.  相似文献   
4.
There is evidence that staffing characteristics influence quality of care in nursing homes. Federal and state surveyors conduct inspections of homes to assess their compliance with regulatory standards, including requirements related to staffing. Deficiency citations are issued when these standards are not met. This article examines the relationship between operational, facility, and market characteristics and organizational performance measured as staffing-related deficiency citations. Online Survey Certification of Automated Records (OSCAR) data from 2000 through 2007 were used with multinomial logistic regression analyses to identify factors associated with deficiency citations for staffing. Chain members and facilities with poor quality of care were more likely to receive deficiency citations for staffing. Greater bed count and competition between nursing homes were associated with a decreased likelihood of deficiency citations for staffing. Staffing-related deficiencies within nursing homes vary according to various operational, facility, and market characteristics.  相似文献   
5.
This article describes the development and application of a generic approach to the comparative assessment of risks related to the production of organic chemicals by petrochemical processes versus white biotechnology. White biotechnology, also referred to as industrial biotechnology, typically uses bio-based feedstocks instead of the fossil raw materials used in the petrochemical sector. The purpose of this study was to investigate whether the production of chemicals by means of white biotechnology has lower conventional risks than their production by petrochemical processes. Conventional risks are the risks of well-established processes, and not those related to genetically modified microorganisms and plants. Our approach combines classical risk assessment methods (largely based on toxicology), as developed by the life cycle assessment (LCA) community, with statistics on technological disasters, accidents, and work-related illnesses. Moreover, it covers the total process chain for both petrochemical and bio-based products from cradle to grave. The approach was applied to five products: the plastics polytrimethylene terephthalate (PTT), polyhydroxyalkanoates (PHA), polyethylene terephthalate (PET), polyethylene (PE), and ethanol. Our results show that the conventional risks related to the white biotechnology products studied are lower than those of the petrochemical products. However, considering the uncertainties with respect to the ranges of input data, the (incomplete) coverage of emissions by the environmental priority strategies (EPS) 2000 method, and the uncertainties of the assumptions made in this study (i.e., large to very large), the differences in results between bio-based and petrochemical products fall into the uncertainty range. Because of this, future research is necessary to decrease the uncertainties before we can conclude that the conventional risks of biotechnologically produced chemicals are lower than those of fossil-fuel-derived chemicals.  相似文献   
6.
Abstract

Objective: To investigate sleep patterns and problems of university business students. Participants: Undergraduate Chinese business students in Hong Kong. Methods: Self-reported questionnaires were completed during class lectures and through online system. Results: Of the 620 participating students (mean age 19.9 years), sleep duration was significantly shorter during weekdays (6.9 hours) than weekends (8.6 hours). Two thirds of students reported sleep deprivation. The following factors were associated with being a “poor sleeper” (Pittsburgh Sleep Quality Index > 5): attending early morning lectures (odds ratio [OR] = 1.90), living on-campus (OR = 1.89), Sleep Sufficiency Index less than 0.8 (OR = 2.55), sleep debt (differences of total time-in-bed between weekday and weekend ≥ 75 minutes) (OR = 1.58), and minor psychiatric disturbances (OR = 2.82). Conclusions: Poor sleep quality and sleep deprivation were prevalent in university business students in Hong Kong, especially for those attending early morning lectures and living on-campus. Systemic education on the importance of sleep and stress and time management is needed for university students.  相似文献   
7.
Abstract

Objective: To review the literature on college student waterpipe use with a focus on undergraduates in the United States. Participants: Undergraduate students. Methods: Studies were accessed using the databases PubMed, MEDLINE, PsycINFO, and Academic Search Premier. Searches included combinations of the following keywords: “waterpipe,” “hookah,” “shisha,” “nargila,” “argileh,” “hubble bubble,” “college,” “university,” and “student.” Results: Results demonstrate that approximately 1 in 5 American college students report past-year waterpipe use. Results also suggest that there are a number of established correlates of waterpipe smoking, including male gender, Arab ethnicity, cigarette smoking, and the belief that waterpipe smoking is less harmful than cigarette smoking. Conclusions: Despite its harmful health effects, waterpipe smoking is quite common among college students. Future research with better methodologies and theoretical frameworks are needed to advance the field.  相似文献   
8.
Abstract

Objective: Given recent approval for administration of a human papillomavirus (HPV) vaccine to men, it is important to assess the HPV-related perspectives of men and women. The purpose of this study was to examine gender differences in HPV knowledge, beliefs, and vaccine acceptance among college students attending 3 historically black colleges/universities in the Southeast. Participants and Methods: A nonprobability sample of 575 students completed a self-report questionnaire. Results: Males were significantly less likely to have heard of HPV, scored lower in HPV knowledge, were less likely to perceive HPV health outcomes as severe and that there was a benefit to vaccinate, reported fewer cues for vaccine acceptance, and perceived more barriers to vaccination compared to females (all p < .05). Conclusions: The gender disparities demonstrated in this study highlight the need to increase HPV-related communication/education to include men and to extend HPV research to a broader segment of the college population.  相似文献   
9.
Abstract

Objective: This study assessed a mediational model in which negative automatic thoughts and anxiety sensitivity were hypothesized to mediate the relationship between perfectionism cognitions and depressive and anxiety symptoms. Participants: Participants were undergraduate students from an urban Canadian university. The data were collected from July 2009 to August 2010. Methods: In a cross-sectional evaluation, 992 undergraduate participants completed questionnaires that assessed perfectionism cognitions, negative automatic thinking, anxiety sensitivity, and anxiety and depressive symptoms. Results: Mediational analysis confirmed the role of anxiety sensitivity and negative automatic thoughts in mediating the association between perfectionistic cognitions, anxiety symptoms, and depressive distress. Furthermore, in line with previous studies, nearly a third of students displayed an elevated prevalence of anxiety and depressive symptoms. Conclusions: This study further clarified the associations and mediating relationships among mood states associated with perfectionism.  相似文献   
10.
ABSTRACT

This study aimed to develop and validate a brief tool for physician use to improve suspicion about the presence or absence of elder abuse. A literature review on elder abuse, obstacles to its identification, limitations of detection tools, and characteristics of screeners employed by physicians were used to generate elder abuse detection questions for critique by 31 doctors, nurses, and social workers in focus groups. Six resulting questions became the Elder Abuse Suspicion Index (EASI) administered by 104 family doctors to 953 cognitively intact seniors in ambulatory-care settings. Findings were compared to a recognized, detailed elder abuse Social Work Evaluation (SWE) later administered to participants by social workers blinded to the results of the EASI. The EASI had an estimated sensitivity and specificity of 0.47 and 0.75, usually took less than 2 minutes to ask, and 97.2% of doctors felt it would have some or big practice impact. This research is a first phase in the development and validation of a user-friendly tool that might sensitize physicians to elder abuse and promote referrals of possible victims for in-depth assessment by specialized professionals.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号