Stair-rod dislocations in perovskite films on LaAlO3 substrates

Two types of stair-rod dislocation formed at junctions of {111} stacking faults in SrTiO₃-SrRuO₃ two-layer films on LaAlO₃ substrates have been studied by high-resolution transmission electron microscopy. The first type, formed by the interaction of two stacking faults situated at the flat SrRuO₃-LaAlO₃ interface without any step, has a Burgers vector (a/3)<110>. The other type, formed by the interaction of two stacking faults, of which one starts from the SrRuO₃-LaAlO₃interface area involving an interface step, has a Burgers vector (a/3)<120>. The formation mechanism of the stair-rod dislocations and the effect of the step are discussed.     

THE EFFECTS OF FUNCTIONAL ANALYSIS TEST SESSIONS ON SUBSEQUENT RATES OF PROBLEM BEHAVIOR IN THE NATURAL ENVIRONMENT

The present study was conducted to determine whether elevated response rates that occurred in an experimental functional analysis were correlated with higher post‐session response rates in the natural environment. Functional analyses indicated that the problem behavior of four children with developmental disabilities was maintained by common sources of reinforcement. Observational assessment in the natural environment showed no differences in post‐session rates compared with pre‐session rates for three participants, and the data for the fourth participant were equivocal. Overall, no convincing evidence was found to suggest that functional analyses might worsen post‐session problem behavior in the natural environment. Copyright © 2012 John Wiley & Sons, Ltd.     

Effects of Domain,Retention Interval,and Information Load on Young and Older Adults’ Visuospatial Working Memory

Age-related differences in visuospatial working memory were examined in 69 young adults and 49 older adults exposed to three pairs of tasks. Each pair consisted of one task involving information about the form or appearance of items and another task involving information about item locations. The first pair of tasks manipulated retention interval and required maintaining information about one item. The second pair also manipulated retention interval and required maintaining information about multiple items presented simultaneously. The third pair manipulated the number of sequentially presented items. Analyses of the first two pairs of tasks revealed significant age deficits in working memory for spatial locations but not in working memory for visual features. Notably, there were no age differences in the effect of retention interval on any of the four tasks, suggesting that visuospatial information is lost at similar rates in older and young adults. Analyses of the third pair of tasks revealed that, regardless of domain, increasing the amount of information impaired older adults’ memory performance to a greater extent than young adults’ performance. Thus, the present results suggest differences in basic working memory capacity in both domains, but a lack of age differences in rates of forgetting from working memory, and greater age-related deficits in the spatial domain than in the object domain.     

重组人粒细胞集落刺激因子预防肿瘤化疗后Ⅲ度以上骨髓抑制的疗效分析

探讨重组人粒细胞集落刺激因子(rhG-CSF)对初诊晚期肿瘤患者化疗后骨髓抑制的合理预防用药时机.采用前瞻性随机方法,筛选首次化疗后出现Ⅲ度～Ⅳ度骨髓抑制的肿瘤患者,以化疗前24h内给予rhG-CSF的为预防治疗组;以化疗前未预防性给药为对照组,采用组间对照法,比较两组化疗后骨髓抑制的发生情况.结果发现两组的骨髓抑制发生率,预防组明显低于对照组,且Ⅲ度以上骨髓抑制发生率也明显降低.首次化疗后出现Ⅲ度～Ⅳ度骨髓抑制的肿瘤患者,下次化疗前24h内预防性给予rhG-CSF,能有效控制肿瘤化疗后骨髓抑制的发生,降低感染的风险,值得推广.     

肠内外营养对炎症性肠病的治疗价值

炎症性肠病是一种病程长且反复的疾病,它的发病可能与环境、免疫、肠道微生态与基因有关.由于摄入减少、消化吸收不良、丢失增加、能量-蛋白质改变和药物作用等各种原因,炎症性肠病患者不管在急性期还是缓解期常常出现营养不良.然而,营养不良又妨碍炎症性肠病治疗的效果,所以肠内外营养对炎症性肠病的治疗就显得至关重要.本文归纳了肠内外营养治疗的价值及成分改良对治疗价值影响的主要进展,最后在此基础上,为了使得营养治疗更有针对性,本文对炎症性肠病患者的营养遗传学及营养基因组学研究提出了展望.     

父母冲突对青少年社交焦虑的影响：序列中介效应分析

采用父母冲突儿童知觉量表(CPIC)、父母关系安全感量表(SIS Scale)和社交焦虑分量表调查480名高中生,运用偏差矫正的百分位Bootstrap方法探索青少年对父母冲突的威胁知觉和情绪不安全感在父母冲突水平与青少年社交焦虑之间的序列中介作用。本研究同时检验认知情境理论和情绪安全感理论,发现青少年对父母冲突的威胁知觉对其情绪不安全感的不同维度存在不同影响,从而更为完善地揭示父母冲突影响青少年社交焦虑的内部机制。具体来说,父母冲突主要通过三条途径影响青少年社交焦虑:通过威胁知觉的中介作用;通过情绪不安全感,特别是消极表征的中介作用;通过依次影响威胁知觉和情绪不安全感(特别是消极表征和情绪失调)而正向预测青少年社交焦虑。     

早期乳腺癌患者术后心理状况研究

早期乳腺癌的检出率越来越高,关注治愈率同时,人们越来越关心患者术后的心理状态及生活质量.本文对保乳术及根治术后5年患者进行心理调查.保乳组患者术后心理障碍发生率明显低于根治组.保乳组患者术后心理状况影响因素主要为术后美容效果,而根治组患者心理障碍发生率与年龄、职业、家庭收入相关.两种手术方式对患者5年生存率及无病生存率的影响无明显差异,所以对于早期乳腺癌患者,在符合保乳原则的前提下,保乳手术是一种既安全又能提高生活质量的手术方式.     

反思性学习与临床技能教学的提高

反思性学习是一种终身学习方法,具有培养自学与思考能力的优点,是解决当前临床技能教学内在矛盾的有效方式之一.反思性学习理念要求教师重新设计教学环节,帮助学生养成良好的记录习惯,认真对待错误,时刻检省自身学习态度,并通过不断重复培养良好的心理素质.     

双任务干扰的注意资源限制机制:来自汉字笔画数效应的证据

该研究的两个实验采用心理不应期范式,探讨了重叠任务情境下双任务的相互干扰机制。实验中被试相继完成高低音的辨别任务(T1)和汉字外在特征(颜色或笔画数)的任务判断(T2),T1和T2间采用变化的SOA。结果发现:(1)T1的反应选择导致T2的加工成绩大幅下降,PRP效应非常显著。(2)当T1占据中枢瓶颈时,T2和T1在中枢瓶颈中并行得到加工并导致T1的加工效率显著下降。(3)由于注意资源的有限性,具有自动激活特征的汉字同样受瓶颈机制的限制。只要存在对注意资源的二次分配就会存在瓶颈的调节机制。     

Right Hemispheric Dominance of Creative Insight: An Event-Related Potential Study

The purpose of this study was to investigate the hemispheric effect of creative insight. This study used high-density ERPs to record participants' brain activity while they performed an insight task. Results showed that both insight solutions and incomprehension solutions elicited a more negative ERP deflection (N320～550) than noninsight solutions in the time window of 320～550 msec. Scalp ERPs and topographical maps revealed that the insight N320～550 exhibited a relative RH dominance, whereas the incomprehension N320～550 exhibited a relative midline dominance. Dipole source analysis showed that the generator of N320～550 elicited by insight and incomprehension solutions was localized in the right middle frontal gyrus and the right parahippocampus gyrus, respectively. These distinct spatiotemporal patterns involved in insight processing and incomprehension processing suggest that the observed N320～550 might reflect the processing of set-shift and the formation of novel associations. Moreover, the spatiotemporal pattern of brain activation associated with insight solutions supported the idea that the right hemispheric dominance theory of creative thinking also applies to creative insight.