小错误带来大麻烦——网络管理员Scott Russell追踪奇怪的DNS问题

我参考文档．两次重新安装DNS服务器．依然没有结果。最后．我打电话给主机公司．他们告诉我总公司已经把所有的DNS和MX记录都改到了他们的服务器上。”——Scott Russell,网络管理员[编者按]     

Exchange集锦

很多企业都不愿意使用SharePoint Portal Sewer的事件日历，因为他们对Exchange的公用日历十分满意并且拒绝迁移到SharePoint平台。下面我为大家提供如何将Exchange公用日历与SharePoint进行集成的办法。     

Phosphate application to firing range soils for Pb immobilization: the unclear role of phosphate

Phosphate treatment has emerged as a widely accepted approach to immobilize Pb in contaminated soils and waste media, relying on the formation of the highly insoluble mineral pyromorphite as solubility-controlling phase for Pb. As such, phosphate treatment has been proposed as a Best Management Practice (BMP) for firing ranges where Pb occurs in its metallic forms and several other phases (carbonates, oxides). While pyromorphite thermodynamically has the potential to control Pb solubility at low levels, its formation is kinetically controlled by pH, the solubility of the phosphate source, and the solubility of Pb species. Treatability studies have shown that excess quantities of soluble and acidic phosphate sources, such as phosphoric acid, are necessary for successful in situ treatment. Even under these conditions, Extended X-ray Absorption Fine Structure (EXAFS), the only reliable method to identify and quantify Pb speciation, showed that Pb conversion to pyromorphite in in situ treated soils was less than 45% after 32 months. Furthermore, the use of lime (CaO) to restore soil pH in acidified soil treatments inhibited further conversion. Additionally, phosphate treatment is known to reduce bioavailability through pyromorphite formation in the intestinal tract, and the phytoaccumulation of Pb; both desirable effects for Pb-impacted areas. Given the costs of phosphate treatment, the use of biogenic phosphate sources, such as bone meal, may be a more environmentally sustainable approach toward this end. In the many studies focusing on phosphate treatment, the attendant P leaching and eutrophication have been largely overlooked, along with other issues such as the enhanced leaching of oxyanionic contaminants, such as Se, As and W. The success and sustainability of applying phosphate as a BMP in firing range soils therefore remain questionable.     

多岛型高回弹性PA6/PET复合纤维的开发

介绍了以涤纶(PET)为岛、锦纶(PA6)为海,采用复合纺丝技术开发的多岛型高回弹性PA6/PET复合纤维的生产流程,探讨了原料的选择、切片干燥、纺丝温度、组件设计、冷却条件、拉伸加弹、PA6/PET复合比及岛个数等工艺条件,并选择24f×18～20岛、锦涤比50∶50的多岛型高回弹性纤维为最理想产品。纤维织成织物后并不象海岛纤维一样要溶去其中一组分,而是用廉价的PET替代部分昂贵的PA6。结果表明:开发的多岛型高回弹性PA6/PET复合纤维及其织物兼具了锦、涤2种纤维的优点,且原料成本是纯锦纶的2/3。     

更少的Web服务器，更多的可用时间

“控制”是Jason Cornellier的口号。Jason是福特汽车公司的高级系统工程师，负责监视公司Web服务器场的运转，这个服务器场为世界各地的福特分公司提供服务。Jason和他的IT团队在3年前将Web服务器升级为Microsoft Internet Information Services（IIS）6．0，成千上万的福特Web用户看到服务器的在线时间显著增加，停机时间非常少。更主要的是，ⅡS60具有粒度性很好的资源利用率监视和应用程序隔离功能，使IT人员可以密切监视Web场的运转情况。资深编辑AnneGrubb和Jason就ⅡS60如何帮助福特公司强化服务器，改善服务器排故，提高对最终用户的可用性，以及对Web应用程序使用系统资源做出更严密的控制等话题进行了交谈。     

分享知识——一种全新的在线支持和培训方法帮助Raytheon办公室的用户更好地工作

IT人员的主要工作之一是向用户培训关于Microsoft Office和其它应用程序的基础知识。但是这类培训能够把完成特定工作并不是一般任务时所需的正确知识传授给他们吗？按照Pamela Leal，Raytheon公司的信息知识与管理主管的说法，对于Raytheon公司的用户来说，这个问题的答案是肯定的。但是3年前，Pamela和Raytheon公司IT管理部门的其他同事都意识到用户在使用像Microsoft Excel、Word和Power Point一类的Office应用软件时并没有充分发挥它们的效率。     

2006社区英雄——2006：Windows IT创新年

2006年的九位“Windows IT Pro创新者”大奖得主向我们展示了日常技术在他们手里是如何被神奇地转化为尖端解决方案的。[编者按]     

弹力机织物的结构参数对其保形性的影响

在对氨纶弹力机织物多项参数进行测试的基础上，采用多元线性回归方法，分析了织物结构参数与保形性的关系，研究结果表明：纱线氨纶含量对织物的保形性影响最大，其次为织经和织物紧度。