Fast Forwards: 10 Years of Sustainable Initiatives in the Gulf Region

Over the last decade, sustainable initiatives have proliferated in the UAE through a disparate range of public and private sector efforts. Jeffrey Willis , Sustainability Leader for Arup in the Gulf, provides a comprehensive review of these enterprises, highlighting how momentum has been clustered in three distinct periods of activity: previous to 2006 ; 2006 to 2008 ; and then since the global financial crisis in 2008.     

Inexhaustible Ambition: Two Eras of Planning in Doha,Qatar

Architects and researchers in urban design, Kelly Hutzell, Rami el Samahy and Adam Himes , reflect on how the present structure of Doha in Qatar is a result of intermittent state interventions - failures as well as successes. They explain how these sporadic initiatives manifested themselves in two main bursts of activity: 1971-86 and 1999 to the present day.     

基于ARM11嵌入式远程监控系统的分析与设计

为了更好的降低监控成本,提高系统布防的简易性;同时提高传输速度,达到更好的监控效果.采用三星公司S3C6410开发板,及其自带功能强大的ARM11处理器来设计监控系统,利用开源软件mjpg_stream,GCC编译工具,搭建windows和linux下的网络监控系统.实验结果表明,该系统采集图像清晰,达到预期的设计目标.     

重钙超细微粉的制备及应用研究

研究了两种类型重质碳酸钙超细微粉的制备及其在涂布纸中的应用。试验结果表明：使用圆盘磨两段干磨、搅拌磨湿式超细磨制取的重钙超细微粉，粒度可达－２μｍ≥９０％；用于涂布纸生产可以取代优等硫酸钡，是较为理想的刮刀涂布白色颜料     

堆溢出的防范策略

堆溢出攻击是对系统具有致命威胁的一种攻击手段,随着对堆溢出的研究的逐步深入,更多的堆溢出漏洞被不断发现.为了防范这类攻击,提出修改编译器的方法,防范在应用程序上的堆溢出,并在IA32处理器上,基于GCC实现了这种方法.实验表明,该方法可有效的防范堆溢出攻击.     

The use of online bulletin boards by females in the Gulf Cooperation Council Countries

This paper reports the outcomes of a study that investigated the responses of 380 females from the Gulf Cooperation Council Countries (GCCCs) to a questionnaire asking them to give their reasons for using online bulletin boards (OBBs). The study also examined the influence of OBBs on these females’ attitudes to equal gender roles in social and familial settings. Principal components analysis indicated four factors among their reasons: manipulation, belonging, reciprocal exchange/expression, and autonomy. Regression tests revealed that nationality and the reciprocal exchange/expression reason were positively correlated with the endorsement of equal social gender roles, while manipulation and belonging reasons were negatively correlated with it. In addition, belonging and autonomy were negatively correlated with predicted endorsing equal familial gender roles. The study highlights the fact that, because females used the OBBs for reinforcement, attitudes are unlikely to be changed by their use. Finally, the paper concludes by inviting researchers to probe the influence of OBBs, drawing a distinction between affective and cognitive needs, as they may play different roles in predicting the impacts of OBBs.     

重质碳酸钙颗粒分散原理及分散性能评价

本文综合重质碳酸钙颗粒团聚机理,分散稳定机理及分散效果评价方法,提出产生团聚的三个力的计算方法,并提出稳定过程的空间位阻机理的不确定性原因,最后提出微观和宏观结合的分散稳定评价方法。     

GCC在高性能微处理器DSP和CPU上的移植

在分析GCC结构的基础上,总结了GCC在高性能微处理器DSP和CPU上移植的解决方案,并比较了DSP、CPU和RISC结构的处理器在移植上的差别,重点介绍了GCC对DSP和CPU信号处理功能的支持以及指令分组和指令执行分组在GCC中的实现。     

GCC基于IA-64谓词执行的IF转换技术研究

编译器在提高程序运行速度和发挥处理器性能方面起着非常关键的作用,尤其在IA-64体系结构中,其性能的发挥在很大程序上依赖于相应的编译器.IF转换利用IA-64对谓词执行的支持,删除程序中的某些控制流,将控制依赖转换为数据依赖,以便于优化.文章介绍了IA-64体系结构,并详细分析了GCC中基于IA-64谓词执行的IF转换算法.     

Steam Dewatering of Filter Cakes in a Vertical Filter Press

Steam dewatering of filter cakes is recognized as a competitive alternative to conventional air drying and thermally assisted mechanical dewatering (TAMD). The main benefit of cake dewatering with high-pressure steam is that mechanical and thermal dewatering can be efficiently performed in a single process step. The target of this study was to determine the potential of a steam-dewatering technique for two industrial mineral suspensions. The first mineral, kaolin, was very difficult to dewater using conventional mechanical dewatering techniques, whereas the second one, ground calcium carbonate (GCC), represented only moderate resistance to filtration. The secondary objective was to compare the filterability of the original kaolin slurry with the same slurry treated with a coagulant (aluminum sulphate, Al₂(SO₄)₃ · 16H₂O). Four different kinds of experiments were performed: tests without any kind of cake dewatering, tests with air drying, tests with steam drying, and tests with both coagulation and steam drying. The obtained results show that steam dewatering is an efficient technique for achieving lower cake-moisture contents. Also, the positive influence of coagulation on the filtration capacity was found to be considerable in the case of kaolin. An approximate energy balance was created for the steam-drying process and the determined energy efficiencies were compared with those obtainable with an ideal thermal drier. The main conclusion from these comparisons is that steam drying can be effectively used instead of traditional thermal drying if the large energy losses can be reduced by proper insulation and heat recovery systems.