幼儿教师工作压力与生活满意度的关联性研究

摘要:采用问卷调查法对511名幼儿教师进行调查,考察幼儿教师工作压力与生活满意度之间的关联,探讨心理资本和工作倦怠在其中的序列中介效应。结果表明:（1）幼儿教师工作压力、心理资本、工作倦怠、生活满意度两两显著相关;（2）幼儿教师工作压力对生活满意度的直接预测作用不显著,但分别通过心理资本、工作倦怠的独立中介作用以及二者的序列中介作用间接预测生活满意度。研究结果提示不仅要重视缓解幼儿教师的工作压力,降低工作倦怠,还要从提升幼儿教师心理资本、发挥个体资源的保护性作用等途径缓解工作压力对幼儿教师生活满意度的不利影响。     

仿生种植牙应力分布的有限元分析

以上颌中切牙为解剖学基础 ,提出了仿生种植牙模型。相同载荷分别作用于天然牙、仿生牙及骨性结合种植牙模型 ,用二维有限元法计算得到牙周膜和仿生牙周膜的应力分布 ,对三种模型骨界面上的应力分布进行了比较研究     

Teacher self-efficacy moderates the relations between imposed pressure from imposed curriculum changes and teacher stress

Based on the Job Demands-resources (RD-R) model, the aim of the current study was to examine how pressure arising from imposed curriculum changes and teacher self-efficacy relate to perceived stress in teachers. Participants (839 teachers working in English schools) completed an online survey that contained questions about demographics, self-reported pressure from imposed curriculum changes, teacher self-efficacy, and perceived stress. Pressure from imposed curriculum changes was positively, and teacher self-efficacy negatively, related to perceived stress. Teacher-self efficacy moderated relations between pressure from imposed curriculum changes and perceived stress. High teacher self-efficacy was associated with lower perceived stress, relative to low teacher self-efficacy, when pressure from imposed curriculum changes was low. The differential advantage offered by high self-efficacy declined as pressure from imposed curriculum changes increased.     

浅析惠州地区墙体材料的选择

本文通过对惠州地区建筑工程所用墙体材料的调查与分析, 并通过对烧结普通砖与新型墙体材料各项物理力学性能及经济指标的比较, 着重阐述了在实际工程当中惠州地区应广泛采用新型墙体材料的重要性, 以及大力推广墙体改革的必要性.     

论英语节奏

阐述了英语节奏的特点，论述了英语节奏与词重音、句重音、重音规整性，音长、元音的音质、语调和语言的可理解性三者之间的相互关系和影响。提出了掌握英语节奏的正确方法。     

不同品种黄瓜幼苗光合机构对盐胁迫的响应

研究了盐胁迫(0、25、50mmol／L)对不同品种黄瓜幼苗生长、光合作用和叶绿素荧光的影响．结果表明，盐胁迫，尤其是高浓度NaCl(50mmol／L)的胁迫，显著降低黄瓜幼苗生长量、叶绿素含量、光系统Ⅱ光合电子传递量子效率(φPSⅡ)、净光合速率(Pn)、气孔导度(Gs)以及气孔限制值(Ls)，同时显著提高叶片相对电导率、丙二醛、脯氨酸含量和细胞间CO2浓度(Ci)，光系统Ⅱ的光化学效率(Fv／Fm)变化不大．盐胁迫对耐盐黄瓜‘津研4号’幼苗生长的影响小于盐敏感黄瓜‘津绿4号’，这可能与耐盐黄瓜在盐胁迫下较高的净光合速率、光系统Ⅱ光合电子传递量子效率和较低的丙二醛(MDA)含量、相对电导率有关。     

非协调轴对称杂交应力元单元刚度矩阵的准确建立

给出新型三类用理性杂交模式、根据一种修正的Ｈｅｌｌｉｎｇｅｒ－Ｒｅｉｓｓｎｅｒ原理、建立高精度非协调轴对称实体旋转有限元时，其单元刚度矩阵的准确计算式。     

浅析企业网络安全

针对企业目前面临的网络安全问题,提出了一个网络安全模型,对网络的攻击类型和安全技术进行描述,并提出网络安全解决方案,企业可根据自己的网络制定安全策略,从而提高企业网络的安全性。     

小型空心砌块建筑墙体裂缝的控制与防治

小型空心砌块建筑墙体设计到位,并在施工中应严格按有关规范和设计要求进行,裂缝是完全可以控制和防治的。     

Effects of osmotic stress on antioxidant enzymes activities in leaf discs of P<Subscript>SAG12</Subscript>-<Emphasis Type="Italic">IPT</Emphasis> modified gerbera

Leaf senescence is often caused by water deficit and the chimeric gene PSA612-1PT is an auto-regulated gene delaying leaf senescence. Using in vitro leaf discs culture system, the changes of contents of chlorophylls, carotenoids, soluble protein and thiobarbituric acid reactive substance （TBARS） and antioxidant enzymes activities were investigated during leaf senescence of PSA612-1PT modified gerbera induced by osmotic stress compared with the control plant （wild type）. Leaf discs were incubated in 20%, 40% （w/v） polyethylene glycol （PEG） 6 000 nutrient solution for 20 h under continuous light [ 130 μmol/（m^2·s）]. The results showed that the contents of chlorophylls, carotenoids and soluble protein were decreased by osmotic stress with the decrease being more pronounced at 40% PEG, but that, at the same PEG concentration the decrease in the transgenic plants was significantly lower than that in the control plant. The activities of superoxide dismutase （SOD）, catalases （CAT）, ascorbate peroxidase （APX）, guaiacol peroxidase （GPX） and dehydroascorbate reductase （DHAR） were stimulated by PEG treatment. However, the increases were higher in PSA612-IPT transgenic plants than in the control plants, particularly at 40% PEG treatment. Lipid peroxidation （TBARS content） was increased by PEG treatment with the increase being much lower in transgenic plant than in the control plant. It could be concluded that the increases in the activities ofantioxidant enzymes including SOD, CAT, APX, GPX and DHAR were responsible for the delay of leaf senescence induced by osmotic stress.