Recollections of sexual socialisation among marginalised heterosexual black men

This paper describes the sexual socialisation process of marginalised, drug-using heterosexual black men, focusing primarily on the sources and content of sexual information. Analysing qualitative interview data, we discovered that the men in our sample both learn about sex and become sexually active at an early age. They most often learn about sex from the media and least often learn about sex from family members. The content of sexual information varies in specifics, but overall tends to equate sex with pleasure, encourage sexual activity with multiple partners and emphasise using protection. Our goal is to use this data to better understand how sexual socialisation contributes to the prevalence of multiple sexual partners and high rates of HIV among heterosexual black men in order to inform future risk-reduction intervention programmes.     

Factors affecting the speed of free writing

Factors affecting the free writing speed of 11‐year‐old students were investigated using the Group and Individual Assessment of Handwriting Speed. Intelligence, gender, legibility and whether the student has special educational needs or speaks English as an additional language were all found to impact on writing speed to a significant extent. In one of the two schools studied, the students wrote significantly faster than the students in the other school. This ‘teacher effect’ was found to be independent of the other significant factors examined in the study and was attributed largely to instructional differences between schools and teachers. The average writing speed was 36% lower than published norms for this test, implying that 70.2% of the students would be eligible for extra time in examinations and raising doubts regarding the validity of these norms. It was concluded that vulnerability to teacher effects and other factors makes free writing an unreliable method of measuring writing speed, especially when group administered, and calls into question its use to justify the provision of examination access arrangements or accommodations.     

简易自动电阻测试仪的设计

文章介绍了一种简易自动电阻测试仪,可用于电子产品制作中电阻元件分类回收及筛选。本设计选用STC89C52型单片机作为主控芯片,介绍其硬件电路组成及软件系统的主程序流程,具有制作简单、性能可靠等优点。测试结果表明：该简易自动电阻测试仪测量结果符合设计要求,测量误差5％,为设计目标范围。     

物联网应用中802．11无线局域网拒绝服务攻击研究

针时物联网应用所面临的无线拒绝服务攻击。利用排队理论研究WiFi设备通信资源的消耗特征,探求无线拒绝服务攻击下通信资源快速耗尽的原因,研发解决拒绝服务攻击的技术。此研究将有助于物联网应用的大力推广及健康发展。     

Mg／Al／Cu类水滑石焙烧产物对茜素黄GG的吸附

采用共沉淀法以不同的Mg^2＋、Al^3＋与Cu^2＋摩尔比制备一系列的镁铝铜三元类水滑石（Cu／Mg／Al—HTLc）。并研究了镁铝铜类水滑石的焙烧产（HTLc-500）对阴离子染料茜素黄GG的吸附特征。分别考察了不同镁铝铜摩尔比的HTLc－500、吸附剂投放量、反应温度、染料的初始浓度等因素对HTLc-500吸附阴离子染料茜素黄GG的影响。结果表明,对于合有20mg／L的茜素黄GG模拟废水溶液,镁铝铜摩尔比为8：10：22的类水滑石,投放量为25mg。在25℃下反应360min。去除率可达到99．14％。     

《春阿氏》＂把／将＂字句对比研究

成书于清末民初的小说《春阿氏》用地道的北京方言写成,具有从早期现代汉语向成熟现代汉语过渡的特征,对于分析北京口语的发展历程,充分认识汉语语法演变过程具有极高的语料价值。对《春阿氏》中的“把／将”字句进行穷尽式搜索,详尽地描述“把／将”字句的句法结构、分布特征、使用的语体差异,可以较清晰地展示“把／将”句在清末民初汉语发展中的面貌。     

基于椭圆曲线的RFID标签访问安全机制研究

射频识别（Radio Frequency Identification,RFID）系统中读写器对标签的读写最为频繁,为了保证电子标签的安全,在开放信道内,读写信息不能以明文形式传输,需要采用高安全等级的密钥管理系统,弥补电子标签自身的安全设计不足,保证电子标签的安全运行。在分析各种加解密方案的基础上,提出了基于椭圆曲线的RFID标签访问安全适用的解决方案,为RFID信息安全做出探索性研究。     

举升用圆筒形直线感应电动机模型及电磁计算

根据旋转电动机工作原理,研发了基于直线感应电动机的圆筒形直线举升模型,并从能量平衡的角度建立了考虑边端效应的等效电路,计算了模型结构参数和起动特性参数,为举升模型的实用化奠定了技术基础。     

毛泽东“反特权阶层”思想与奥尔森破“分利联盟”理论的借鉴价值

一个社会失去了以群众利益为最高利益的价值观和不能为人民群众提供政治参与的渠道,在政治秩序超稳运行的条件下必定会形成由少数人共谋形成的垄断社会资源的既得利益集团,毛泽东称之为“特权阶层”,奥尔森称之为“分利联盟”。这种既得利益集团只关心如何在社会总财富中瓜分更大的份额,而不再关心如何创造更多的社会财富,其危害性一是使市场经济秩序不能扩展到全社会,阻碍市场经济的健康发展;二是造成政令不畅,政治体制出现肥大症和僵化症,最终危及政权存亡。只有批判继承毛泽东的群众思想和奥尔森的“司法一体化”原则去打破这些既得利益集团,才能有助于社会秩序的长治久安。     

SO4^2--/La2 O3-ZrO2-HZSM-5催化合成柠檬酸酯

首次合成了固体超强酸催化剂SO4^2--/La2O3-ZrO2-HZSM-5,并用其合成了六种柠檬酸酯,分析了催化剂用量、焙烧温度、反应时间、醇酸比等因素对酯化率的影响。结果表明：500℃焙烧3 h所得催化剂活性最好,柠檬酸酯的酯化率可达91.5%以上,高碳醇的酯化率高于低碳醇的酯化率,且该催化剂具有良好的重复使用和再生能力。