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移动时代的阅读 发展中国家移动阅读研究 被引量:18
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作者 mark west Han Ei Chen +3 位作者 沈浠琳 薛玉贞 王晨宇 李超平 《图书馆论坛》 CSSCI 北大核心 2015年第9期4-4,6-52,共48页
序 几个世纪以来,文本获取渠道的限制一直是提高识字能力的障碍。阅读需要书籍,离开了书籍,扫盲依旧是遥不可及的。 不过在今天,得益于廉价移动技术的普及,这种障碍正在被克服。手机提供了一种新的、可负担的、易于使用的阅读材... 序 几个世纪以来,文本获取渠道的限制一直是提高识字能力的障碍。阅读需要书籍,离开了书籍,扫盲依旧是遥不可及的。 不过在今天,得益于廉价移动技术的普及,这种障碍正在被克服。手机提供了一种新的、可负担的、易于使用的阅读材料获取门户。 展开更多
关键词 阅读研究 发展中国家 识字能力 获取渠道 阅读需要 移动技术 阅读材料 书籍
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减少材料耗费——高效织物成形混凝土
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作者 mark west 《世界建筑导报》 2010年第1期48-49,共2页
项目地点:加拿大项目类型:工业产品开工日期:未定该项目展示了一种技术:用灵活柔软的织物而不是传统的刚性模具制造混凝土构件。
关键词 织物
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THE EVALUATION OF CHANGE IN CONCRETE STRENGTH DUE TO FABRIC FORMWORK
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作者 Farhoud Delijani mark west Dagmar Svecova 《Journal of Green Building》 2015年第2期113-133,共21页
Fabric,as a flexible formwork for concrete,gives builders,engineers,and architects the ability to form virtually any shape.This technique produces a superb concrete surface quality that requires no further touch up or... Fabric,as a flexible formwork for concrete,gives builders,engineers,and architects the ability to form virtually any shape.This technique produces a superb concrete surface quality that requires no further touch up or finishing.Woven polyolefin fabrics are recommended for this application.The texture of this fabric allows water from concrete mix to bleed,and therefore reduces the water-cement ratio of the mix.Due to the reduction in the water-cement ratio,a higher compressive strength in fabric-formed concrete is achieved,which is also suggested by earlier studies.The current research study was conducted to investigate and document the changes in concrete strength and overall quality due to these woven polyolefin fabrics.Use of fabric formwork will result in a decrease in construction cost,construction waste,and greenhouse gas emissions.Two sets of tests were conducted in this research study:a comparison of the compressive strength of fabric-formed versus PVC-formed concrete cylinders,and a comparison of the behaviour of the fabric-formed columns versus cardboard-formed reinforced concrete columns.Variables in this research were limited to two types of fabric that included one with coarse and one with a more refined texture,and two types of concrete that included ordinary and flyash concrete.The laboratory results revealed that the effects of fabric formwork on concrete quality in a large member are limited mostly to the surface zone and the core of the concrete remains the same as a conventionally formed concrete.Even though fabric-formed cylinder tests showed an average of a 15%increase in compressive strength of the concrete samples,the compressive strength of the reinforced columns did not dramatically change when compared to the companion cardboard formed control columns.This research confirmed that fabric formwork is a structurally safe alterna-tive for forming reinforced concrete columns. 展开更多
关键词 concrete fabric formwork flexible formwork reinforced concrete column test
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