Effect of deposition parameters on mechanical properties of TiN films coated on 2A12 aluminum alloys by arc ion plating (AIP)

1 Introduction Weight saving materials such as aluminum and its alloys are becoming increasingly important and have been attracting increasing attention over the past decade, specially in the automotive, aerospace and chemical industries, and electrical devices because of their high strength-to-weight ratio, high electrical and thermal conductivities, processability and recyclability and good resistance to degradation in some corrosive environments [1,2]. In the automotive industry, there is d…     

表面处理工艺在修复脱粉机分配盘的应用

引进德国进口二手设备KSΦ5．7M干式脱粉机，经修复后用于潘三矿原煤脱粉；介绍了修复脱粉机分配盘组件的表面处理工艺过程和如何做好氧化处理前表面的准备、氧化处理、涂油等工序流程；使用效果表明，分配盘的耐比性和耐磨性较好，为修复进口脱粉机和推广脱粉工艺作了有益的尝试。     

关于军用飞机着陆灯专用电源设计方案的定量计算

10 0 0 W军用飞机着陆灯的灯丝是一种非线性时变电阻 ,冷电阻极小 ( 0 .0 4Ω左右 ) ,工作几秒钟后才能达到额定阻值 ( 0 .9Ω ) ,在对该灯进行老炼及检测时 ,如何仿真飞机着陆时迅速点亮的实际情况 ,是设计这种专用电源的一大难题。本文运用非线性时变电阻理论和金陵职业大学电源专利技术 ,进行了分析和定量计算 ,成功地解决了这一难题     

人与自然的三次对话——浅论诗人生命体验的跋涉历程

人与自然的关系是文学创作的永恒母题。在人与自然的对称关系中,既有崇敬中的惶惶情愫,也有企图征服的大胆渴望,更有在平衡心境中的超越、契合。西方叙事文学用两千年记录下的人与自然的三次对话,浓缩了西方抒情诗人近二百年间的生命体验。这其中包括:一、自然崇拜情结;二、人与自然的对抗融合;三、人与自然的和谐统一;四、中西诗歌的共同指归。     

变压器套管检修与维护

通过对变压器套管发生故障的原因的分析，制定出减少套管故障的相应措施，从而获得变压器套管最佳的检修维护方式和处理此类故障的正确方法，对电力系统的稳定运行有较大的实用价值。     

Discursive Dancing: Traditionalism and Social Realism in the 2013 English History Curriculum Wars

This paper is an exploration of the debates surrounding the publication of a new National Curriculum for history in England. The draft curriculum was published in February 2013 and was withdrawn just 6 months later in the face of considerable opposition. This paper offers a tentative explanation for this example of a rare phenomenon: effective resistance to curriculum change. Using a socio-cognitive approach to discourse analysis, the paper explores the context models of the two antagonists in the contestation: new right traditionalism and social realism. While both context models are viewed as coherent, it is suggested that critics of the draft prevailed because they more fully comprehended the context model of their opponents and were prepared to adapt their strategy accordingly. The paper takes an analytical narrative approach to the contestation. Resistance to the draft is presented in two phases: an initial phase in which criticism was diffuse, instinctive and political; and a more effective mature phase in which opposition united around a depoliticised disciplinary defence of the subject in social realist terms. It is argued that this deft shift went unnoticed by Education Secretary, Michael Gove, rendering ineffective his attacks on his critics as ‘Marxists’ and ‘progressives’.     

Exploring tertiary English as a Foreign Language writing tutors’ perceptions of the appropriateness of peer assessment for writing

Despite the increasing volume of research in peer assessment for writing, few studies have been conducted to explore teachers’ perceptions of its appropriateness for writing instruction. It is essential to understand teachers’ perceptions of peer assessment as teachers play an important role in whether and how peer assessment is implemented in their instruction. The current study investigated tertiary English writing tutors’ perceptions of the appropriateness of peer assessment for English as a Foreign Language writing in China, where peer assessment has been increasingly discussed and researched but only occasionally used in teaching. The current study scrutinised the reasons behind its limited use via in-depth exploratory interviews with 25 writing tutors with different teaching backgrounds. The interview data showed tutors’ limited knowledge of peer assessment and unanimous hesitation in using it. The former was explained by insufficient instruction and training in peer assessment. The latter relates to the incompatibility of peer assessment with the examinations-oriented education system, learners’ low English language proficiency and learning motivation, and the conflict of peer assessment with the entrenched teacher-driven learning culture. Suggestions are made about training and engaging teachers to effectively use peer assessment in instruction.     

‘It doesn’t speak to me’: understanding student of color resistance to critical race pedagogy

Scholars maintain that when race and racism are addressed as factors that continue to shape inequality in the classroom, white students often deny the validity of these claims, while Students of Color tend to feel empowered by them. However, drawing on open-ended interviews, focus group discussions, and survey data, we argue that some Students of Color resist critical race pedagogy and curriculum. Specifically, we identify and analyze how this push back is articulated through three triggers: (1) an entrenchment in majoritarian ideologies; (2) a disavowal of racialized oppression; and (3) a disinclination to scrutinize personal experiences marred by race. These dynamics illustrate what we call ‘resisting decolonization’ – a reluctance to grapple with pedagogies that destabilize dominant ideologies about race and racism in schools and disrupt mainstream ideas regarding ethnic or racial identity. We introduce this concept in an attempt to hone critical race pedagogy to better address the needs of Students of Color who sometimes unknowingly participate in the marginalization of Populations of Color through deficit thinking or through the denial of the continuing significance of race.     

外源海藻糖提高黄瓜抗盐性的初步研究

文章初步研究适宜浓度的海藻糖可以提高黄瓜的抗盐性.以中农16号黄瓜幼苗为供试材料,首先分别用0mM、5mM、10mM、和20mM的海藻糖随1/2Hoagland营养液根灌两次,随后在上述各营养液中加入180mM的NaCI对幼苗进行渗透胁迫3天,自第4天开始测试下列指标:幼苗叶片的相对含水量、离体叶片电导率、MDA含量、叶绿素含量、POD、CAT酶的活性.试验结果如下:5mM、10mM、20mM的海藻糖处理都可以提高高盐渗透胁迫下幼苗叶片的相对含水量、叶绿素含量、POD、CAT酶的活性;降低叶片电导率和MDA含量.而且,10mM的海藻糖处理效果最好,而20mM的海藻糖处理效果不如5mM的海藻糖的处理效果.研究表明:适宜浓度的海藻糖可提高在渗透胁迫下黄瓜幼苗的抗性,在5mM、10mM、和20mM三个浓度中以10mM的海藻糖的处理效果最好.     

大豆β-1,3-葡聚糖酶基因转化烟草及抗病性的研究

构建了大豆β－１，３－葡聚糖酶（β－１，３－ｇｌｕｃａｎａｓｅ）基因的植物表达载体ｐＢＩ１２１－ｇｌｕ，并通过直接转化方法将其导入根癌农杆菌（Ａ．ｔｕｍｅｆａｃｉｅｎｓ）ＬＢＡ４４０４受体菌中，构建了用于植物遗传转化的工程菌株ＬＢＡ４４０４（ｐＢＩ１２１－ｇｌｕ），并以烟草为转化对象进行了遗传转儿，获得了大量再生的转基因烟草．ＰＣＲ，ＰＣＲ－Ｓｏｕｔｈｅｍ以及Ｓｏｕｔｈｅｍ杂交检测结果表明目的基因已整合到烟草基因组中．转基因植株苗期抗立枯病实验表明，部分转化β－１，３－葡聚糖酶基因的工程烟草对立枯丝核菌（Ｒｈｉｚｏｃｔｏｎｉａ　ｓｏｌａｎｉ．）表明出不同程度的抗性提高．