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91.
Intensity functions—which describe the spatial distribution of the occurrences of point processes—are useful for risk assessment. This paper deals with the robust nonparametric estimation of the intensity function of space–time data from events such as earthquakes. The basic approach consists of smoothing the frequency histograms with the local polynomial regression (LPR) estimator. This method allows for automatic boundary corrections, and its jump-preserving ability can be improved with robustness. We derive a robust local smoother from the weighted-average approach to M-estimation and we select its bandwidths with robust cross-validation (RCV). Further, we develop a robust recursive algorithm for sequential processing of the data binned in time. An extensive application to the Northern California earthquake catalog in the San Francisco, CA, area illustrates the method and proves its validity.  相似文献   
92.
This article reports findings from a collaborative study of UK student learning in Malaysia. We analyze the concept of liminality as a means of understanding the transitional process between states and statuses that social work students experience in practice learning. Here, in specific reference to immersion in new cultural contexts represented by international placements, the development and learning of students are explored in relation to the overlapping domains of familiar and unfamiliar ‘cultures’ and disciplinary practice. These findings carry implications in terms of the increasing popularity of international placements and the potential imposition of hegemonies of values and knowledge.  相似文献   
93.
Abstract

Objective: To examine whether young adult cigarette smokers who were in the precontemplation and contemplation stages of change for smoking cessation would differ in their evaluations of vignettes depicting 2 types of physician advice. Participants: Fifty-seven young adult cigarette smokers who were undergraduate students (49.1% female, mean age = 20.4 years) attending an urban university. Methods: Participants evaluated 2 written vignettes. Both vignettes depicted physicians using patient-centered communication styles. One vignette depicted a physician giving a patient direct advice to quit smoking and the other a physician using a motivational style of advice. Data were collected from September 2004 through May 2005. Results: Participants rated the motivational advice vignette as significantly more favorable compared to the direct advice vignette on all assessed dimensions (global satisfaction, general satisfaction, physician affective style, physician technical style, and physician communication style). Conclusion: Smokers preferred the motivational advice style to simple patent-centered advice.  相似文献   
94.
This article's core idea is that body modification can be seen as a nonstandard symbolic expression of a long-standing project of the enlightenment: to control human destiny, with the dream of conquering death. This idea is based on experimentally validated tenet of existential psychology that the denial of death is one of humanity's deepest motivations. The first highlights a common denominator in the articles by Pitts-Taylor, Sullivan, and Knafo: they courageously oppose the knee-jerk reaction that body modification necessarily entails giving in to social or gender pressure. Instead each proposes refined psychodynamic hypotheses. Knafo's analysis of body artist Orlan is taken as the starting point for an elaboration of this cultural phenomenon as a reflection of the denial of death.  相似文献   
95.
The rapid expansion of computer use and Internet connection has the potential to change patterns of family interaction, with conflicts arising over adolescents' autonomy, parental authority and control of the computer. This study applied a conceptual framework derived from family development and human ecology theory to investigate family characteristics related to the likelihood of such conflicts. A secondary analysis was conducted of a special survey of 754 children aged 12 to 17 who used the Internet, and of their parents, performed by Pew Internet and the American Life project. Adolescent-parent conflicts over Internet use proved strongly related to the perception that the adolescent was a computer expert. Families in which adolescents were considered experts in new technologies were more likely to experience conflicts. Parents' attempt to reduce adolescent autonomy by regulating the time of Internet use increased the likelihood of family arguments over the Internet. Intergenerational conflicts over the Internet were higher in families in which parents expressed concern over the potentially negative consequences of Internet use. The implications of the findings are discussed.  相似文献   
96.
The main aim of the study relates to the links between bullying and victimization on the one hand and reactive and proactive aggression on the other. In addition, we also investigated stability and incidence of bullying and victimization. At age 7, 236 children were rated on bullying and victimization using peer reports. At age 8, 242 children were rated again. Two hundred and fifteen children (114 girls and 101 boys) were present at both time points. Reactive and proactive aggression was assessed by teachers. The results showed that bullies and bully/victims were both reactively and proactively aggressive, while victims were only reactively aggressive. A moderate degree of stability of bullying and victimization was found, with bullying being more stable than victimization. Boys were more often bullies than girls and more stable than girls in victimization. Stable victims and stable bully/victims were more reactively aggressive than their unstable counterparts. The relevance of the outcomes to preventing future maladjustment and suggestions for further research are discussed.  相似文献   
97.
98.
Resource-based view research plays a prominent role in strategic management studies. In this paper we investigate the relativistic interpretation of the 'scarcity' concept, the appropriability of complementary resources, the measurability of the contribution that a specific resource brings to the overall value of the firm. The theoretical issues have been made context specific trying to show (a) how a not-scarce complementary resource like movie theatres can help build value for the distributor, mainly through the creation of reputation for the subsequent TV broadcasting; (b) that this resource can be appropriated from different companies; (c) that companies can develop different kinds of interfirm relationships in order to control complementary resources; (d) that reliable and valid parameters can be provided to measure the value of resources and the related degree of control from the distributors. Supporting empirical evidence is provided and implications for managing complementary resources are discussed.  相似文献   
99.
The present study was designed to investigate stability and changes in prosocial behavior and the parent and peer correlates of prosocial behavior in rural adolescents. Participants were from a rural, low SES community in the Eastern United States. The participants were in 7th, 8th, and 9th grades at Time 1 and 10th, 11th, and 12th grades at Time 4, and completed measures of prosocial behavior and quality of parent and peer relationships. Latent growth curve modeling revealed that despite moderate stability in individual differences in prosocial behavior and slight increases in quality of peer and parent relationships, level of prosocial behavior declined until late high school with a slight rebound in grade 12. Furthermore, increases in the quality of peer relationships predicted decreases in prosocial behavior for girls but not boys. Discussion focuses on continuity and change in prosocial behavior and the gender‐based relations between quality of parent and peer relationships and prosocial behaviors in adolescence.  相似文献   
100.
This study examined the concurrent and construct validity of the OMNI-Cycle Rating of Perceived Exertion (RPE) Scale, using elderly men and women. Seventy-six participants performed a load-incremented cycle-ergometer exercise test. Concurrent validity was determined by correlating OMNI-RPE responses with oxygen uptake, relative peak oxygen uptake, pulmonary ventilation, heart rate, respiratory rate, and respiratory-exchange ratio during a load-incremented cycle-ergometer protocol. Construct validity was established by correlating RPE derived from the OMNI-Cycle Scale with RPE from the Borg (6-20) Scale. Multilevel, mixed linear-regression models indicated that OMNI-RPE distributed as a significant (p < .05) positive linear function (r = .81-.92) for all physiological measures. OMNI-RPE was positively (p < .01) and linearly related to Borg-RPE in elderly men (r = .97) and women (r = .96). This study demonstrates both concurrent and construct validity of the OMNI-Cycle RPE Scale. These findings support the use of this scaling metric with elderly men and women to estimate RPE during cycle-ergometer exercise.  相似文献   
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