Interactions of Sex Steroids with Gonadotropin-Releasing Hormone in the Regulation of Gonadotropin (GtH) and Growth Hormone (GH) Release in the Common Carp (Cyprinus Carpio)

Theeffectsofgonadalsteroidsonserumgonadotropin(GtH)andgrowthhormone(GH)responseto(D-Arg6,Pro9NEt)-salmongonadotropin-releasinghormone(sGnRHA)anddomperidone(DOM),adoparnine-receptorantagonistwereinvestigatedthroughouttheseasonalreproductivecycleofcommoncarp(Cyprinuscarpio).Gonad-intactfemalefishwereimplantedintraperitioneallythrougha2～3mmincisioninthebodywallwithsilasticpelletscontainingnosteroid(blank),testosterone(T,100μg/gbodyweight),orestradiol(E2,100μg/gbodyweight).Atvariousstage…     

Emergence and constructvalidation of the big five factors in early childhood: a longitudinal analysis of their ontogeny in Sweden

Researchers have shown that the five major dimensions of personality (extraversion, agreeableness, conscientiousness, neuroticism, and openness to experience) and two additional factors (irritability and positive activity) are evident from adolescence. This study attempted to replicate and extend these results in a longitudinal study of 102 Swedish children, followed from 2.3 to 15.2 years of age. Item analyses revealed consistently reliable irritability, conscientiousness, and positive activity factors, whereas the internal reliability of the extraversion, agreeableness, neuroticism, and openness to experience factors increased over time. Irritability and positive activity were not independent of the other factors. Scores on most of the personality factors were fairly stable over time. Over time, children became less extraverted, more agreeable, and more conscientious. Neuroticism and openness to experience increased in Phase III, although openness then decreased in Phase V. Validity of the original factors was demonstrated by correlations with independent assessments of the children's cognitive performance and adjustment to school.     

并联机床主模块静刚度的有限元分析(英文)

借助商用有限元分析软件 ANSYS,首先研究了并联机床主模块各主要构件对其刚度的贡献 ,发现机架起主要作用 ;进而研究了约束条件、支链长度以及不同工作方式对其刚度的影响规律 ,发现当约束机架上不含驱动单元的主侧面时 ,主模块的刚度最大 ,并且主模块用于立式机床时 ,其刚度远优于用于卧式机床 ;最后 ,分析总结了机床位于工作空间不同位置时的刚度变化规律 .该成果为并联机床主模块的设计提供了重要的理论指导 .     

Event-related potentials and consonant differentiation in newborns with familial risk for dyslexia

We measured event-related potentials (ERPs) to synthetic consonant-vowel syllables (/ba/, /da/, /ga/) from 26 newborns with familial risk for dyslexia and 23 control infants participating in the Jyv?skyl? Longitudinal Study of Dyslexia. The syllables were presented with equal probability and with interstimulus intervals ranging from 3,010 to 7,285 ms. Analyses of averaged ERPs from the latencies identified on the basis of principal component analysis (PCA) revealed significant group differences in stop-consonant processing in several latency ranges. At the latencies of 50-170 ms and 540-630 ms, the responses to /ga/ were larger and more positive than those to /ba/ and /da/ in the right hemisphere in the at-risk group. Between 740 and 940 ms, the responses to /ba/ and /da/ differed between anterior and posterior electrode sites in the control group. These results indicate that the cortical electric activation evoked by speech elements differs between children with and without risk for dyslexia even immediately after birth. Group-related effects at early and late latency ranges of ERPs suggest differences both in the early sound processing based on activation of afferent elements and in later phases of syllable encoding.     

Japanese and American children's evaluations of peer exclusion,tolerance of differences,and prescriptions for conformity

Children and adolescents (N = 1,057), divided by gender, at fourth, seventh, and tenth grades, from two mid-sized cities in the United States and in Japan, were surveyed regarding their evaluations of peer group exclusion of atypical peers. Six reasons for atypicality were being aggressive, having an unconventional appearance, acting like a clown, demonstrating cross-gender behavior, being a slow runner, and having a sad personality. Analyses revealed significant effects for age, gender, country membership, and the context of exclusion. With age, children demonstrated context sensitivity, and believed that the excluded child should not change him- or herself to be accepted by the group. Across contexts, girls were less willing to exclude than were boys, and were more tolerant of differences. The context of exclusion had an effect on all forms of judgments about exclusion, and there were very few overall effects for culture. Most children disagreed with the decision to exclude, believed that they were different from the atypical child, and believed that the excluded child should change him- or herself to be accepted by the group. The results support a theory of developmental social cognition in which multiple sources of influence have a significant effect on social decision making involving the exclusion of others.     

A scale for home visiting nurses to identify risks of physical abuse and neglect among mothers with newborn infants

OBJECTIVE: The aim was to construct and test the reliability (utility, internal consistency, interrater agreement) and the validity (internal validity, concurrent validity) of a scale for home visiting social nurses to identify risks of physical abuse and neglect in mothers with a newborn child. METHOD: A 71-item scale was constructed based on a literature review and focus group sessions with social nurses and paraprofessionals who had experience with underprivileged families. This scale was applied in a random sample of 40 home visiting social nurses, who collected data in a sample of 373 nonabusive and 18 abusive/neglectful mothers with a newborn child. RESULTS: Items with prevalence rates below 5% and items making no significant difference between maltreating and non-maltreating mothers were omitted. The final version contained 20 items. This scale showed high internal consistency (alpha = .92) and high interrater reliability (r = .97). Exploratory factor analysis yielded a three-factor solution: Isolation (8 items, explaining 62.17% of the common variance), Psychological complexity (6 items, 18.86%), and Communication problems (6 items, 8.41%). Scores on Communication problems and Isolation significantly predicted scores on a social deprivation scale, which significantly distinguished maltreating from non-maltreating mothers. Mothers scoring high on Communication problems or Isolation obtained higher scores for social deprivation than low-scoring mothers. CONCLUSIONS: Home visiting nurses can identify risks for physical abuse and neglect among mothers with a newborn infant by focusing on signs of social isolation, distorted communication and psychological problems.     

Neural correlates of face and object recognition in young children with autism spectrum disorder,developmental delay,and typical development

This study utilized electroencephalographic recordings to examine whether young children with autism spectrum disorder (ASD) have impaired face recognition ability. High-density brain event-related potentials (ERPs) were recorded to photos of the child's mother's face versus an unfamiliar female face and photos of a favorite versus an unfamiliar toy from children with ASD, children with typical development, and children with developmental delay, all 3 to 4 years of age (N = 118). Typically developing children showed ERP amplitude differences in two components, P400 and Nc, to a familiar versus an unfamiliar face, and to a familiar versus an unfamiliar object. In contrast, children with ASD failed to show differences in ERPs to a familiar versus an unfamiliar face, but they did show P400 and Nc amplitude differences to a familiar versus an unfamiliar object. Developmentally delayed children showed significant ERP amplitude differences for the positive slow wave for both faces and objects. These data suggest that autism is associated with face recognition impairment that is manifest early in life.     

中国文学研究与翻译在苏联

我国自古以来就关注中国文学,这在H·比丘林(1777一1853)的著作中早已表现出来.尽管H,比丘林并非专门研究中国文学史,然而,他的著作全面阐述了中国生活(历史、人文科学、文化、翻译和日常生活),这便为其后中国文学艺术史的专门研究奠定了基础.为进入中国文学艺术的殿堂,必须克服“汉语识字”这一语言障碍.     

Definitions of bullying: a comparison of terms used,and age and gender differences,in a fourteen-country international comparison

The study of school bullying has recently assumed an international dimension, but is faced with difficulties in finding terms in different languages to correspond to the English word bullying. To investigate the meanings given to various terms, a set of 25 stick-figure cartoons was devised, covering a range of social situations between peers. These cartoons were shown to samples of 8- and 14-year-old pupils (N = 1,245; n = 604 at 8 years, n = 641 at 14 years) in schools in 14 different countries, who judged whether various native terms cognate to bullying, applied to them. Terms from 10 Indo-European languages and three Asian languages were sampled. Multidimensional scaling showed that 8-year-olds primarily discriminated nonaggressive and aggressive cartoon situations; however, 14-year-olds discriminated fighting from physical bullying, and also discriminated verbal bullying and social exclusion. Gender differences were less appreciable than age differences. Based on the 14-year-old data, profiles of 67 words were then constructed across the five major cartoon clusters. The main types of terms used fell into six groups: bullying (of all kinds), verbal plus physical bullying, solely verbal bullying, social exclusion, solely physical aggression, and mainly physical aggression. The findings are discussed in relation to developmental trends in how children understand bullying, the inferences that can be made from cross-national studies, and the design of such studies.