后现代主义与教学论的实践转向

后现代主义自它产生之日起,其影响遍及了各个领域,教学论也不可避免地受其影响而发生重大的变化。传统的教学论是一种理性主义的教学论,目前也存在一些弊端。后现代主义的出现,使传统教学论发生了向实践教学论的转向。分析后现代主义的精神主旨,以及与现代主义不同的特点,有利于教学论新局面的开展。     

盗窃网络虚拟财产的刑法规制之比较

网络游戏产业给各国带来了的不菲经济收益,与此同时,各国多发的盗窃网络虚拟财产的案件,需要刑法的规制,本文通过比较国内外网游产业发达地区关于盗窃虚拟财产的刑事立法和判例,以期给我国相对落后的刑事立法提供合理借鉴。     

张爱玲作品影视改编热之原因探究

20世纪80年代以来,影视界掀起了一股"张爱玲作品改编热",从而使之成为作品被影视改编最多的中国现当代作家之一.社会环境的变化、影视事业的发展及其作品本身与观众审美取向的契合是促成这一现象的最终原因.     

Chewing substances with or without tobacco and risk of cardiovascular disease in Asia: a meta-analysis

Objective  

To assess whether people who ever use any form of chewing substance in Asia are at increased risk of cardiovascular disease (CVD).     

Sevoflurane postconditioning reduces myocardial reperfusion injury in rat isolated hearts via activation of PI3K/Akt signaling and modulation of Bcl-2 family proteins

Sevoflurane postconditioning reduces myocardial infarct size.The objective of this study was to examine the role of the phosphatidylinositol-3-kinase(PI3K)/Akt pathway in anesthetic postconditioning and to determine whether PI3K/Akt signaling modulates the expression of pro-and antiapoptotic proteins in sevoflurane postconditioning.Isolated and perfused rat hearts were prepared first,and then randomly assigned to the following groups:Sham-operation(Sham),ischemia/reperfusion(Con),sevoflurane postconditioning(SPC),Sham plus 100 nmol/L wortmannin(Sham+Wort),Con+Wort,SPC+Wort,and Con+dimethylsulphoxide(DMSO).Sevoflurane postconditioning was induced by administration of sevoflurane(2.5%,v/v) for 10 min from the onset of reperfusion.Left ventricular developed pressure(LVDP),left ventricular end-diastolic pressure(LVEDP),maximum increase in rate of LVDP(+dP/dt),maximum decrease in rate of LVDP(?dP/dt),heart rate(HR),and coronary flow(CF) were measured at baseline,R30 min(30 min of reperfusion),R60 min,R90 min,and R120 min.Creatine kinase(CK) and lactate dehydrogenase(LDH) were measured after 5 min and 10 min reperfusion.Infarct size was determined by triphenyltetrazolium chloride staining at the end of reperfusion.Total Akt and phosphorylated Akt(phospho-Akt),Bax,Bcl-2,Bad,and phospho-Bad were determined by Western blot analysis.Analysis of variance(ANOVA) and Student-Newman-Keuls' test were used to investigate the significance of differences between groups.The LVDP,±dP/dt,and CF were higher and LVEDP was lower in the SPC group than in the Con group at all points of reperfusion(P0.05).The SPC group had significantly reduced CK and LDH release and decreased infarct size compared with the Con group [(22.9±8)% vs.(42.4±9.4)%,respectively;P0.05].The SPC group also had increased the expression of phospho-Akt,Bcl-2,and phospho-Bad,and decreased the expression of Bax.Wortmannin abolished the cardioprotection of sevoflurane postconditioning.Sevoflurane postconditioning may protect the isolated rat heart.Activation of PI3K and modulation of the expression of pro-and antiapoptotic proteins may play an important role in sevoflurane-induced myocardial protection.     

反思性教学在英语口语教学中的运用

反思性教学是以追求实践合理性为目的的教学探究活动,是以提升专业知识为目的的教师学习活动,同时也是以解决问题为导向的教师思维方式。因此,反思性教学逐渐成为外语教师专业提升和发展的有效途径。其实质是教师通过反思,在教育教学实践中逐渐形成适合自己的教学理论和发展自己的教学能力,其策略运用到口语教学中时,效果尤其明显,在提高学生动口能力及动口欲望的同时,无形当中提升了学生学习英语的积极性。     

改进的遗传算法在入侵检测中的应用

随着系统漏洞不断被发现,攻击不断发生,对入侵检测的效率提出了更高的要求。本文先采用改进的遗传算法,把关联规则应用在遗传算法的适应度函数的设计上,最后通过试验比较,得出该算法具有更好的检测效果。     

例谈化学课堂中的情景教学

文章从化学教学实践出发,阐述了利用化学实验、利用生活现象、利用设置"问题"等几方面创设情境教学的重要手段及其在课堂教学中的具体运用。     

论文化差异对商务英语翻译的影响

主要讨论中西之间的文化差异以及它们对商务英语翻译的影响。首先讨论了中西文化差异的主要原因,然后列举了一系列例子来说明如何在文化背景下翻译好商务英语,并在最后给出了一些建议。     

笑语何以幽默——论合作原则下的幽默生成机制

幽默是一种多彩多姿的语言艺术,折射出英语文化中的巧思和智慧。英语幽默致笑的根源更是多种多样,由于幽默多产生于话语交际之中,本文试从H.P.Grice的会话含义理论及合作原则对英语言语幽默试进行语用分析,从而探讨英语幽默致笑的深层动因。