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A projective (2n,n,λ,1)-design is a set of n element subsets (called blocks) of a 2n-element set V having the properties that each element of V is a member of λ blocks and every two blocks have a non-empty intersection. This paper establishes existence and non-existence results for various projective (2n,n,λ,1)-designs and their subdesigns. 相似文献
95.
This paper examines the theoretical and empirical basis for common rank-orderings of occupational roles by raters throughout the world. From an illustrative comparison of occupational stratification in Australia and the United States we conclude tentatively that (1) commonalities in the socioeconomic characteristics of occupational roles provide the basis for interplace consistencies in “prestige” scores, (2) the structure of occupational mobility in the U.S. and Australia is largely similar, (3) this similar structure of occupational stratification manifests a common socioeconomic process which defines a (the?) major component of occupational mobility in capitalist, industrial (only?) societies. We infer that “prestige” scores for occupations are fallible estimates of the socioeconomic statuses of occupation, within the context of mobility processes in (at least) the U.S. and Australia. 相似文献
96.
The Big Five personality factors were used as a framework for examining the expected personality characteristics of individuals who are alcohol-dependent. In an experimental study, participants used a measure of the Big Five personality factors to rate two individuals, each described with either signs of alcohol dependence or not. The ratings of the participants showed that they expected the alcohol-dependent versions of both individuals to be less agreeable and less conscientious. The participants expected the alcohol-dependent college student to be more extraverted and the alcohol-dependent lawyer-father to be more neurotic. The expected personality characteristics of the alcohol-dependent versions of the two described persons were very similar to the actual personality characteristics of alcohol-dependent individuals. The results were consistent with prior findings regarding narrow-band personality traits related to the Big Five. The results help explain prior findings about the social handicap of problem drinking with regard to making friends, dating, marriage, and working. The findings have potential use in alcohol-problem prevention and treatment. 相似文献
97.
This study explored the relationship between low emotional intelligence and substance-use problems in adults. One hundred and forty-one participants completed the Self-Administered Alcoholism Screening Test, the Drug Abuse Screening Test, an emotional intelligence scale, and a measure of psychosocial coping. Low emotional intelligence was a significant predictor of both alcohol-related problems and drug-related problems. Poorer coping predicted drug-related problems, but not alcohol-related problems. Coping was not found to be a significant mediator between emotional intelligence and substance-use problems. Possible implications for intervention and treatment efforts are discussed. 相似文献
98.
Recent meta-analyses and experimental designs of batterer program evaluations suggest little or no program effect. This finding may be compromised by a variety of analytical issues. Instrumental variable analysis addresses some of these issues, especially the relationship of program dropout to batterer reassault. This method of analysis was, therefore, used to test for program effect in a multi-site evaluation. The sites were three well-established batterer programs using a gender-based, cognitive-behavioral approach (n = 640). Completing a batterer program reduced the likelihood of reassault by 44% to 64%, depending on the specification used. Completing a 3-month program appeared to be as effective as completing a 5 1/2- or 9-month program. This moderate effect is an accomplishment considering the problems associated with the program participants and the inconsistency in the criminal justice system at the research sites. The findings remain tentative because of weak instrumental variables for reassault, but do confirm the need for more complex analyses of program effect. 相似文献
99.
Jones J Ward M Wellman N Hall J Lowe T 《Journal of psychosocial nursing and mental health services》2000,38(12):10-20
1. Nursing observation is a key component of psychiatric inpatient nursing care. 2. Patients' experiences of being observed are strongly influenced by the attitudes and behaviors of the observing nurses. 3. Patients prefer to be observed by nurses they know and who talk to them. 相似文献
100.
The aim of this work is to be a useful instrument for helping finance practitioners on the selection of suitable mutual fund portfolios. The portfolio selection problem is characterized by imprecision and/or vagueness inherent in the required data and more generally, in the context where investors have to make decisions. In order to mitigate these problems, a three stage model has been proposed based on a multi-index model and considering several market scenarios described in an imprecise way by an expert. The proposed fuzzy model allows the Decision Maker to select, by means of an outranking method, a suitable portfolio taking into account the uncertainty related to the market scenarios and the imprecision and/or vagueness associated with the model data. 相似文献