在“经”与“权”之间——学校德育课程内容的社会学分析     

王晋 《江苏教育研究》2011,(2):32-35

当下的德育内容“厚经薄权”使得德育模式不能承受如此之重。,在主体性德育模式中．德育内容“假”框架限制主体;在活动德育模式中,德育内容“大”主题阉割活动：在“学会关心”德育模式中,德育内容“空”结构扼杀关心．。德育内容本身的理论偏差是矛盾的主要方面。它掺杂着太多的理想主义痕迹。“教育就是社会化”的命题能够在较大程度上修正德育内容表述的偏颇之处。在一定意义上,教会学生社会化就是教学生学会选择。未来的德育内容需围绕幸福教育和社会平等教育两个方面来建构。  相似文献   

反馈研究对改进教育考试分数报告的启示     

田霖  王桥影 《考试研究》2011,(1):65-71

分数报告是教育评价的关键环节,旨在向考生传递评价结果。分数报告属于学业反馈的范畴,通过控制反馈信息的传递方式对考生进行有效干预,可以促进考生的学业表现。为此须认真分析、借鉴反馈研究成果,改进现有教育考试的分数报告。本文认为,理想的教育考试分数报告应包含丰富的信息,提出认知策略的改进建议,通过内置启发性的问题引发学习者反思,并采用积极的反馈效价,从而促进考生的学习与发展。  相似文献   

Effect of epidermal growth factor on follicle-stimulating hormone-induced proliferation of granulosa cells from chicken prehierarchical follicles     

Lin JX  Jia YD  Zhang CQ 《Journal of Zhejiang University. Science. B》2011,12(11):875-883

The development of ovarian follicular cells is controlled by multiple circulating and local hormones and factors, including follicle-stimulating hormone (FSH) and epidermal growth factor (EGF). In this study, the stage-specific effect of EGF on FSH-induced proliferation of granulosa cells was evaluated in the ovarian follicles of egg-laying chickens. Results showed that EGF and its receptor (EGFR) mRNAs displayed a high expression in granulosa cells from the prehierarchical follicles, including the large white follicle (LWF) and small yellow follicle (SYF), and thereafter the expression decreased markedly to the stage of the largest preovulatory follicle. SYF represents a turning point of EGF/EGFR mRNA expression during follicle selection. Subsequently the granulosa cells from SYF were cultured to reveal the mediation of EGF in FSH action. Cell proliferation was remarkably increased by treatment with either EGF or FSH (0.1–100 ng/ml). This result was confirmed by elevated proliferating cell nuclear antigen (PCNA) expression and decreased cell apoptosis. Furthermore, EGF-induced cell proliferation was accompanied by increased mRNA expressions of EGFR, FSH receptor, and the cell cycle-regulating genes (cyclins D1 and E1, cyclin-dependent kinases 2 and 6) as well as decreased expression of luteinizing hormone receptor mRNA. However, the EGF or FSH-elicited effect was reversed by simultaneous treatment with an EGFR inhibitor AG1478. In conclusion, EGF and EGFR expressions manifested stage-specific changes during follicular development and EGF mediated FSH-induced cell proliferation and retarded cell differentiation in the prehierarchical follicles. These expressions thus stimulated follicular growth before selection in the egg-laying chicken.  相似文献   

Evaluation of the antioxidant effects of four main theaflavin derivatives through chemiluminescence and DNA damage analyses   总被引：1，自引：0，他引：1  

Wu YY  Li W  Xu Y  Jin EH  Tu YY 《Journal of Zhejiang University. Science. B》2011,12(9):744-751

Theaflavins (TFs) are the dimers of a couple of epimerized catechins, which are specially formed during black tea fermentation. To explore the differences among four main TF derivatives (theaflavin (TF₁), theaflavin-3-gallate (TF₂A), theaflavin-3′-gallate (TF₂B), and theaflavin-3,3′-digallate (TF₃)) in scavenging reactive oxygen species (ROS) in vitro, their properties of inhibiting superoxide, singlet oxygen, hydrogen peroxide, and the hydroxyl radical, and their effects on hydroxyl radical-induced DNA oxidative damage were systematically analyzed in the present study. The results show that, compared with (−)-epigallocatechin gallate (EGCG), TF derivatives were good antioxidants for scavenging ROS and preventing the hydroxyl radical-induced DNA damage in vitro. TF₃ was the most positive in scavenging hydrogen peroxide and hydroxyl radical, and TF₁ suppressed superoxide. Positive antioxidant capacities of TF₂B on singlet oxygen, hydrogen peroxide, hydroxyl radical, and the hydroxyl radical-induced DNA damage in vitro were found. The differences between the antioxidant capacities of four main TF derivatives in relation to their chemical structures were also discussed. We suggest that these activity differences among TF derivatives would be beneficial to scavenge different ROS with therapeutic potential.  相似文献   

水库淹没处理实施规划阶段农村移民身份认定问题探讨     

袁静  龙世红 《长江工程职业技术学院学报》2011,28(3):42-44

随着我国经济改革的发展,部分农村人口暂时脱离了农村土地以进城务工、经商等方式赖以生存,但在农村仍保留有户口、原承包土地或房屋等等,情况较复杂。本文对在丹江口水库大坝加高工程建设征地实施过程中,这部分移民身份认定问题进行探讨,供其他水利水电工程建设征地移民搬迁实施时参考。  相似文献   

新世纪自学考试存在的主要问题及其补正     

林双泉 《教育与考试》2011,(3):5-8

当前,自考存在着教育功利主义及应试教育倾向,存在着专业课程设置僵化、考试评价方式和自学媒体单一等弊端。新世纪,必须进一步改革和完善自考制度,明确教育培养目标,克服自考的应试教育倾向,改革考试内容,建立多元化评价体系,实行开放的课程设置体系,加强对自学媒体的建设,以促进考生综合素质的提升和全面发展。  相似文献   

焦虑情绪和适应能力对大学新生学习生活的影响     

鲍方印  王松  孙玉军  崔峰  高林  刘爱荣 《安徽科技学院学报》2011,25(2):100-103

采用焦虑自评量表和心理适应性自测量表对67名大学新生进行三次心理健康状况调查,结果显示有一般心理问题的学生占28.36%;有严重心理问题的学生占6.00%。焦虑产生的原因有生理需要不满足、安全感缺失、没有归属感、实现自我价值有压力。高校可以通过素质教育,加强校园文化建设,提高学生的适应能力,完善心理健康教育系统,缓解大学生的心理焦虑。  相似文献   

浅议高校大学生群体性突发事件的预防管理     

麦林 《贺州学院学报》2011,27(2):18-20

因社会因素、学校教育管理因素、学生自身因素等原因,高校大学生群体性突发事件时有发生,严重影响了高校的安全稳定。高校应增强危机意识,建立大学生群体性突发事件的识别、研判等机制,加强教育,提高管理水平,建立通畅的学生群体利益表达渠道,努力构建和谐校园文化,有效预防大学生群体性突发事件的发生。  相似文献   

Lumped parameter model for resonant frequency estimation of a thermoacoustic engine with gas-liquid coupling oscillation     

Ke Tang  Tian Lei  Xiao-gang Lin  Tao Jin  Yu Zhang 《浙江大学学报(A卷英文版)》2011,12(3):232-237

Gas-liquid coupling oscillation is a novel approach to reducing the resonant frequency and to elevating the pressure amplitude of a thermoacoustic engine. If a thermoacoustic engine is used to drive low-frequency pulse tube refrigerators, the frequency matching between the thermoacoustic engine and the refrigerator plays an important role. Based on an acoustic-electric analogy, a lumped parameter model is proposed to estimate the resonant frequency of a standing-wave thermoacoustic engine with gas-liquid coupling oscillation. Furthermore, a simplified lumped parameter model is also developed to reduce the computation complexity. The resonant frequency dependence on the mean pressure, the gas space volume, and the water column length is computed and analyzed. The impact of different working gases on the resonant frequency is also discussed. The effectiveness of the models is validated by comparing the computed results with the experimental data of the gas-liquid coupling oscillation system. An increase in the mean working pressure can lead to a rise in the resonant frequency, and a lower resonant frequency can be achieved by elongating the liquid column. In comparison with nitrogen and argon, carbon dioxide can realize a lower frequency due to a smaller specific heat ratio.  相似文献   

Comparison of different techniques for time-frequency analysis of internal combustion engine vibration signals     

Yang Jin  Zhi-yong Hao  Xu Zheng 《浙江大学学报(A卷英文版)》2011,12(7):519-531

In this study, we report an analysis of cylinder head vibration signals at a steady engine speed using short-time Fourier transform (STFT). Three popular time-frequency analysis techniques, i.e., STFT, analytic wavelet transform (AWT) and S transform (ST), have been examined. AWT and ST are often applied in engine signal analyses. In particular, an AWT expression in terms of the quality factor Q and an analytical relationship between ST and AWT have been derived. The time-frequency resolution of a Gaussian function windowed STFT was studied via numerical simulation. Based on the simulation, the empirical limits for the lowest distinguishable frequency as well as the time and frequency resolutions were determined. These can provide insights for window width selection, spectrogram interpretation and artifact identification. Gaussian function windowed STFTs were applied to some cylinder head vibration signals. The spectrograms of the same signals from ST and AWT were also determined for comparison. The results indicate that the uniform resolution feature of STFT is not necessarily a disadvantage for time-frequency analysis of vibration signals when the engine is in stationary state because it can more accurately localize the frequency components excited by transient excitations without much loss of time resolution.  相似文献