双液注浆锚管加固在渗水软弱围岩浅埋偏压隧道中的应用

通过乌坑坝隧道北京端左线冲沟地段的施工实例，介绍渗水软弱围岩浅埋偏压隧道地表双液注浆锚管加固的施工方法，并对加固效果及其优缺点进行分析．     

基于素质的空中交通管制生源选拔和培养研究

本文介绍了民航空中交通管制工作对从业人员的素质要求,分析了国内外在管制专业生源选拔和培养方面的不同做法,提出了适合我国国情的空管专业学生培养方法。     

西部农村留守妇女家庭压力及其影响因素分析

本文采用西部地区24个行政村千余名农村妇女的调查数据,探讨了农村留守妇女的家庭压力及影响因素。研究发现,留守确实增强了农村妇女的家庭压力,留守妇女承受的精神压力、经济压力、抚养赡养压力都要大于非留守妇女;留守妇女的年龄、家庭特征、当初择偶时对般配的重视程度、夫妻异质性、与外出丈夫的沟通状况、社会支持等因素对其家庭压力有不同程度的影响。提出建立夫妻间良好的沟通机制和构建社会支持网络的建议。     

基于单片机AT89C51的全自动变频恒压供水系统

介绍了一种新型的变频恒压供水系统.该系统根据供水管网的用水情况,调整水泵投入台数及转速,实行全自动恒压供水,达到高效节能的目的;其水泵用变频器软启动,对电网无冲击,能延长水泵的使用寿命.     

The Impact of Flexible Working Arrangements on Work–life Conflict and Work Pressure in Ireland

Recent rapid economic growth in Ireland has been accompanied by a strong surge in the number of women in employment, and this has led to a significant increase in the proportion of dual‐earner families. These changes have brought the issue of reconciliation between work and care commitments to the fore. Flexible working arrangements in firms have been identified as one important means of balancing work and other commitments. In this article we investigate the relationship between four flexible working arrangements; flexitime, part‐time hours, working from home and job sharing, and two key employee outcomes; work pressure and work–life conflict, using data from the first national survey of employees in Ireland in 2003. Our results show that while part‐time work and flexitime tend to reduce work pressure and work–life conflict, working from home is associated with greater levels of both work pressure and work–life conflict. We conclude that it is important to distinguish between flexible working arrangements to discover their potential for reducing work pressure and work–life conflict.     

仇视、狂热与压力——中古欧洲十字军反犹动机解析

关于十字军的反犹动机问题,学界观点纷呈。在各种观点中,基督教的反犹主义意识是主导因素,它推动了长达百年的反犹活动持续发生,而当时狂热浓厚的宗教氛围则为反犹暴行提供了合适＂土壤＂,商品经济所带来的巨大压力则成为了反犹的突破口。诸多因素综合作用遂导致反犹活动频繁上演。     

聚酯聚合反应分层温度控制系统

介绍了聚合釜聚酯聚合反应温度过程控制系统及其设计方法。控制系统以高性能单片机系统为直控机（DDC）,PC机为上位机（MIS）,直控机负责聚合釜釜温及夹套温度采集、分析、控制,并将参数送上位机。上位机负责控制过程的时间及温度值设定、温度监测、工作过程监控。     

AGING,RETIREMENT AND SOCIAL SECURITY IN A MODEL OF INTEREST GROUPS

The assessment of the degree of genetic variation in a natural population, and the nature of that variation, is of central importance in both theoretical and applied population studies. Two “variance” results in population genetics theory are presented. For the first, expressions are found for the expected difference in the estimates of genetic variation in a population obtained by two investigators sampling from the same population in the same generation. The second result concerns the question of whether the degree of genetic variation in a population is best estimated by using the number of alleles observed in a sample of genes or by the number of polymorphic sites observed in the sample. For some combinations of the actual degree of variation and the sample size the former is preferred while for other combinations the latter is preferred. The reason for this is discussed.     

A Fiasco of Volcanic Proportions? Eyjafjallajökull and the Closure of European Airspace

Abstract

The unprecedented and recurrent closure of much of UK and northern European airspace from 14 April 2010, following the eruption of Iceland’s Eyjafjallajökull volcano, caused the cancellation of 108,000 flights, disrupted the travel plans of 10.5 million passengers, and cost the airline industry in excess of $1.7 billion in lost revenue. The airspace closures highlighted the inherent riskiness of aviation and destabilised dominant cultural discourses of the ‘superiority’ and capability of aviation technology. It also brought issues of risk acceptability and our socio‐economic reliance on air travel into sharp relief. This paper explores how the political and media framing of the response to the airspace closures as a human ‘policy fiasco’ served to obfuscate the inherent dangers of aviation and ‘get Europe flying’ again. Thus, this paper contends that this particular fiasco was ‘necessary’ in that it served to highlight the fragility of air travel and the vulnerabilities of the mobile citizen.