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11.
This study tested models of an individual's choice to copy illegally music using survey data from a random sample of adults who acquired recorded music. It added to the short list of studies of crime based on data from a general population sample and formally tested the added predictive power of an augmented crime model containing variables from both the theory of reasoned action (TRA) and rational choice models. The results supported the desirability of using general population samples and the augmented model. Policies that change attitudes and perceived norms have the potential to reduce crime.  相似文献   
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13.
This paper addresses estimation and decomposition of productivity change, which is mostly identified as technical change under constant (unitary) returns to scale (CRS). If the CRS assumption is not made, productivity change is decomposed into technical change and scale effects.Furthermore, if inefficiency exists, it also contributes to productivity change. Here we decompose productivity change into efficiency change, technical change, and scale effects. Three alternative approaches using parametric production, cost, and profit functions, which differ in terms of behavioral assumptions on the producers and data requirements, are considered.  相似文献   
14.
Although intensive mothering ideology underscores the irreplaceable nature of mothers' time for children's optimal development, empirical testing of this assumption is scant. Using time diary and survey data from the Panel Study of Income Dynamics Child Development Supplement, the authors examined how the amount of time mothers spent with children ages 3–11 (N = 1,605) and adolescents 12–18 (N = 778) related to offspring behavioral, emotional, and academic outcomes and adolescent risky behavior. Both time mothers spent engaged with and accessible to offspring were assessed. In childhood and adolescence, the amount of maternal time did not matter for offspring behaviors, emotions, or academics, whereas social status factors were important. For adolescents, more engaged maternal time was related to fewer delinquent behaviors, and engaged time with parents together was related to better outcomes. Overall, the amount of mothers' time mattered in nuanced ways, and, unexpectedly, only in adolescence.  相似文献   
15.
The purpose of the study was to identify the stages of acquisition of gateway drugs in fourth, fifth, and sixth graders. The Stages of Acquisition model is a primary prevention application of the Stages of Change model. The subjects in the study were 811 students from seventeen elementary schools in Arkansas and Missouri. The instrument elicited information regarding the stages of acquisition and individual self-reported drug use. The data were analyzed using frequency, distribution, discriminant analysis, and correlation analyses. Stage placement was confirmed using a series of drug use measures. Results confirmed the existence of discrete stages of acquisition. Results supported the concept of gateway drugs in that subjects indicated they had progressed further through the stages of acquisition of alcohol use than through the stages of acquisition of cigarettes use, smokeless tobacco use, or marijuana use.  相似文献   
16.
The purpose of this paper is to present a quantitative posture analysis of microsurgery tasks performed with different visualization methods. Microsurgery is traditionally performed using a binocular microscope; however surgeons are constrained by the optical eyepieces and are forced to assume joint angles that deviate away from neutral postures. This may be especially problematic for the neck and can increase surgeon discomfort and fatigue. Alternative visualization methods may improve surgeon posture by eliminating the constraints imposed by the microscope. This study examines both 2D and 3D heads-up displays as possible alternatives. Six subjects performed microsurgical tasks with each visualization methods for four hours. Quantitative posture analysis was done using Maxtraq software that tracks reflective markers on the subjects. The initial analysis of neck, upper arm, and elbow angles found significant differences between each display. A biomechanical analysis found that the differences in angles can result in loads on the neck joint that are twice as high in the microscope than the headsup displays. Although the alternative displays can result in better postures, improvements the display technology is needed to improve microsurgical task performance.  相似文献   
17.
Abstract

Objective: The objective of this study was to examine clinical and epidemiological information collected by Student Health Center (SHC) providers on HIV-positive students, and benchmark this information against Infectious Disease Society of America guidelines. Participants: Students who utilized the SHC and had an ICD-9 code indicating positive HIV status between 2005 and 2015 (3?=?7). Methods: In June 2016, we accessed the free-form provider notes of the SHC’s electronic medical records to identify specific, recorded epidemiological and clinical information. Results: Seven unique students sought care at the SHC during the study period. Current sexual risk taking and other known behavioral risk factors were absent from all records, along with CD4 count and viral load. ART status was only available for one patient, and he was not on ART. The information collected failed to meet IDSA benchmarks. Conclusion: Clinically- and epidemiologically-relevant information is not systematically collected from HIV-positive students at SHCs.  相似文献   
18.
The “Mommy Wars” is a cultural frame asserting the existence of a battle between employed mothers and homemakers. We perform critical discourse analysis of U.S. and Canadian news articles using this term from 1989 through 2013 (N = 402). Building upon the concept of symbolic annihilation, we highlight how the frame distorts and trivializes mothers' experiences. First, ironically, although some authors describe the Mommy Wars as not real, usage grows rapidly over time. Moreover, the meaning expands to include “alternative wars” on a multitude of childrearing differences and on disputes outside of mothering altogether (e.g., type of water used); this serves to equate trivialities like tap versus filtered water with work‐family conditions, effectively rendering them equally inconsequential battles among “mommies.” Finally, the frame trivializes social problems through a focus on (middle‐class) mothers' individual choices as a solution to Mommy Wars. Privileging maternal “choice” with only passing mentions of fathers and the state absolves these groups of responsibilities for the next generation. The use of Mommy Wars rhetoric acts as a divisive, symbolic wedge, ultimately perpetuating a war against mothers.  相似文献   
19.
This paper addresses estimation and decomposition of productivity change, which is mostly identified as technical change under constant (unitary) returns to scale (CRS). If the CRS assumption is not made, productivity change is decomposed into technical change and scale effects.Furthermore, if inefficiency exists, it also contributes to productivity change. Here we decompose productivity change into efficiency change, technical change, and scale effects. Three alternative approaches using parametric production, cost, and profit functions, which differ in terms of behavioral assumptions on the producers and data requirements, are considered.  相似文献   
20.
Abstract

Social connectedness has been promoted as one factor that may facilitate optimal functioning for families experiencing economic adversity. Using data from 218 Australian families, the current study explored the relative importance of social connectedness to the functioning of economically diverse families. Overall, results indicated similar levels of social connectedness and family functioning across low- and high-income groups. However, important differences were identified with regards to the relative contribution of social connectedness to the functioning of families across the economic spectrum. Clinical implications arising from these findings include the potential benefit of exploring social connectedness as a routine part of clinical assessment and ongoing intervention for families experiencing economic vulnerability.  相似文献   
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