On quasivarieties and varieties as categories

Finitary quasivarieties are characterized categorically by the existence of colimits and of an abstractly finite, regularly projective regular generator G. Analogously, infinitary quasivarieties are characterized: one drops the assumption that G be abstractly finite. For (finitary) varieties the characterization is similar: the regular generator is assumed to be exactly projective, i.e., hom(G, –) is an exact functor. These results sharpen the classical characterization theorems of Lawvere, Isbell and other authors.Supported by the Czech Grant Agency (Project 201/02/0148).Special issue of Studia Logica: Algebraic Theory of Quasivarieties Presented by M. E. Adams, K. V. Adaricheva, W. Dziobiak, and A. V. Kravchenko     

医疗事故处理法律亟待统一规范

目前在我国医疗工作的实践中,医疗纠纷呈上升趋势。然而,解决和处理医疗纠纷与医疗事故的法律、法规尚不移规范统一。随着我国法制的逐步健全,法律,法规的不断完善,医疗事故处理的法律亟待统一规范,以利于全社会遵法,守法,执法的实现。     

Modeling geometric–optical illusions: A variational approach

Visual distortions of perceived lengths, angles, or forms, are generally known as “geometric–optical illusions” (goi). In the present paper we focus on a class of gois where the distortion of a straight line segment (the “target” stimulus) is induced by an array of non-intersecting curvilinear elements (“context” stimulus). Assuming local target–context interactions in a vector field representation of the context, we propose to model the perceptual distortion of the target as the solution to a minimization problem in the calculus of variations. We discuss properties of the solutions and reproduction of the respective form of the perceptual distortion for several types of contexts. Moreover, we draw a connection between the interactionist model of gois and Riemannian geometry: the context stimulus is understood as perturbing the geometry of the visual field from which the illusory distortion naturally arises. The approach is illustrated by data from a psychophysical experiment with nine subjects and six different contexts.     

Intergenerational Coresidence and Life Satisfaction in Old Age: The Moderating Role of Homeownership

Household structure for older people’s subjective well-being is important to promote healthy ageing in the context of the rapid increase of the older population. Living with adult children is known to promote older people’s life satisfaction, a key indicator of subjective well-being, whereas others claim a negative impact of such intergenerational coresidence. This study aims to empirically test these theories (family support vs. family conflict), by examining the role of homeownership–another important factor contributing to subjective well-being–in this association between intergenerational coresidence and life satisfaction. Analysing the nationally representative data on the elderly population in South Korea, the findings showed that intergenerational coresidence decreases life satisfaction when the elderly achieve a certain level of housing security by living in owner-occupied housing. Living with adult children is negatively associated with life satisfaction particularly for older old homeowners compared to younger old owners. Our findings provide implications for public policies promoting intergenerational coresidence and asset-based welfare to enhance older people’s well-being in Korea and more broadly in East Asia.

     

Personality,Perceived Occupational Stressor,and Health-Related Quality of Life Among Chinese Judges

Personality is hypothesized to have direct and indirect effects on health-related quality of life (HRQoL) through the mediating role of perceived occupational stressors. This hypothesized model was tested with Chinese judges, individuals characterized by high occupational stress. In this cross-sectional study, 330 judges undergoing professional training at the Shandong Judge Training Institute completed questionnaires assessing their personality (Big Five Inventory, BFI), perceived occupational stressors (Occupational Role Questionnaire, ORQ), and HRQoL (Medical Outcomes Study Short-Form Health Survey, SF-36). The proposed model was tested using structural equation modelling (SEM) approaches. The SEM analysis showed a good fit of the data to the hypothesized model(x ²/df = 1.52, P?P?Neuroticism also had a negative indirect effect (?0.18, P?P?P?相似文献   

Balance,Proprioception, and Gross Motor Development of Chinese Children Aged 3 to 6 Years

The authors' aim was to find the features of balance, proprioception, and gross motor development of Chinese children 3–6 years old and their correlations, provide theoretical support for promoting children's motor development, and enrich the world theoretical system of motor development. This study used a Tekscan foot pressure measurement instrument (Tekscan, Inc., Boston, MA), walking on a balance beam, Xsens 3-dimensional positional measuring system (Xsens Technologies, Enschede, the Netherlands), and Test of Gross Motor Development-2 to assess static balance, dynamic balance, knee proprioception, and levels of gross motor development (GMD) of 3- to 6-year-old children (n = 60) in Beijing. The results are as follows: children had significant age differences in static balance, dynamic balance, proprioception, and levels of GMD; children had significant gender differences in static balance, proprioception, and levels of GMD; children's static balance, dynamic balance, and proprioception had a very significant positive correlation with GMD (p < .01), but no significant correlation with body mass index.     

A Systematic Comparison of African American and Non-African American Patients on Psychosocial Aspects of Hepatitis C Infection

The purpose of this study was to compare African American and non-African American hepatitis C virus (HCV) patients on self-reported symptoms of HCV liver disease and psychosocial characteristics commonly affected by it in a sample of 309 patients enrolled in a randomized controlled trial. African Americans (n = 196) rated a higher reliance on religion/spirituality for coping with HCV compared to non-African Americans. This study’s findings are a basis for encouragement of public health efforts and programs to seek partnerships with African American faith and religious communities to identify and treat undiagnosed cases of HCV and promote HCV awareness.     

The effect of cognitive reappraisal on long‐term emotional experience and emotional memory

One's ability to properly regulate emotion is critical to psychological and physical well‐being. Among various strategies to regulate emotion, cognitive reappraisal has been shown to modulate both emotional experience and emotional memory. However, most studies of reappraisal have focused on reappraisal of negative situations, with reappraisal of positive emotion receiving considerably less attention. In addition, the effects of reappraisal on emotional reactions to stimuli are typically only assessed either immediately or after a short delay, and it remains unclear whether reappraisal effects persist over longer time periods. We investigated the effect of cognitive reappraisal on emotional reactions and long‐term episodic memory for positive and negative stimuli. Men and women viewed emotionally negative, positive, and neutral pictures while they were instructed to either increase, decrease, or maintain the initial emotional reactions elicited by the pictures. Subjective ratings of emotional valence and arousal were assessed during the regulation task and again after 1 week. Memory for the pictures was assessed with free recall. Results indicated that pictures accompanied by instructions to increase emotion were better recalled than pictures reappraised to decrease emotion. Modulation of emotional arousal elicited by stimuli persisted over a week, but this effect was observed only for men. These findings suggest that cognitive reappraisal can have long‐lasting effects on emotional reactions to stimuli. However, the sex differences observed for the effects of reappraisal on emotional reactions highlight the importance of considering individual differences in the effects of regulation.     

Helping Peers Seek Professional Treatment for Depression Among Young South Koreans: An Application of the Theory of Planned Behavior

This study examined the applicability of the theory of planned behavior to understand factors that influence whether young South Koreans help peers with depression to seek professional counseling services. The structural equation modeling on the survey data collected from 191 South Korean students suggests that subjective norms and behavioral control could be salient factors for young South Koreans to take initiative and assist their peers in need of counseling services. Este estudio examinó la aplicabilidad de la teoría del comportamiento planificado para comprender factores que influyen sobre la decisión de jóvenes surcoreanos de ayudar a sus compañeros que sufren de depresión a buscar ayuda profesional a través de servicios de consejería. El modelo de ecuación estructural de los datos de la encuesta recogidos de 191 estudiantes surcoreanos sugiere que las normas subjetivas y el control del comportamiento podrían ser factores destacados para los jóvenes surcoreanos a la hora de tomar la iniciativa y ayudar a sus compañeros que necesitan servicios de consejería.