计算机机房的优化管理

随着计算机教育的普及，计算机已成为实验教学重要组成部分，根据计算机机房繁重的实验教学任务，阐述了机房的优化管理，也就是合理安排实验教学、对机房进行科学化、制度化、自动化与安全化管理。     

高校计算机机房管理探讨

计算机机房是高校学生学习计算机的公共场所,科学地管理和维护机房是保证教学工作正常进行的重要环节。根据实际工作经验,从多方面对问题的解决进行了相关探讨和总结,就如何提高高校计算机机房的管理和维护水平提出了一些方法和建议。     

探析计算机网络安全与防范

根据计算机网络安全的基本概念,针对影响计算机网络安全的硬件、软件等四个方面的因素,提出四种计算机网络安全的相关防范措施与方案,解决了计算机网络中潜在的网络安全问题。     

绿色节能机房的设计与实现探讨

分析了数据中心机房主要耗能构成,得出要打造绿色节能机房必须降低机房的能源消耗大户空调和IT设备的能源消耗。在扬州市政府数据中心设计和实施建设过程中,针对机房制冷排热和IT设备选型部署,采取了多种绿色节能措施和手段。在降低机房制冷能耗方面,提出采用精确送风的封闭热通道技术将机房内冷、热气流分离,使热空气不在机房停留。同时,在空调外机加装雾化喷淋技术来降低空调能源消耗。在服务器选型及部署上,采用高性能、低功耗的服务器并运用虚拟化和云计算技术打造了一个绿色节能的数据中心机房。     

“国际计算机与计算技术在农业中应用研讨会”、“国际农产品质量安全管理、检测与溯源技术研讨会”、“中国农村信息化发展论坛”会讯

针对目前全世界计算机与计算技术在农业中的应用的日益广泛、农产品质量安全管理、检测与溯源技术的蓬勃发展和我国在农村信息化建设中面临的共同课题,大会将设立“国际计算机与计算技术在农业中应用研讨会（CCTA）”、“国际农产品质量安全管理、检测与溯源技术研讨会（SMITA）”与“中国农村信息化发展论坛”三个分论坛,旨在研讨计算机与计算技术在农业领域中应用和创新的理论、技术和方法,学习借鉴国际间农产品质量安全管理、检测与溯源技术建设经验和成果,探索农村信息化建设中的创新思路和发展方向等。     

探析高校机房管理与维护方法

介绍了一些提高高校机房维护效率的方法,探讨了对机房进行有效管理的措施,得到了一套适合当今发展的机房管理模式,并针对目前机房管理系统进行了分析和讨论,给出了适当的建议.     

电子商务中的安全研究

电子商务的安全性研究从整体上可分为计算机网络安全和商务交易安全两大部分。计算机网络安全的内容包括计算机网络设备安全、计算机网络系统安全和数据库安全等,其特征是针对计算机网络本身可能存在的安全问题,实施网络安全增强方案,从而保证计算机网络自身的安全性。商务交易安全则是传统商务在互联网络上应用时产生的各种安全问题。     

谈计算机办公局域网络安全

本文通过局域网络系统安全分析,提出计算机办公局域网络安全解决方法用以实现对办公局域网全面的安全管理。     

网络信息安全综合告警系统构建

信息安全综合告警系统的优势在于可以便捷地辅助计算机网络管理人员实现对网络中计算机进行有效的监控,又可以辅助网络管理人员对链路中的不安全因素进行分析预测。对构建一个安全综合告警系统的背景进行了分析、构建了系统模型,并对其进行了测试分析。     

学校机房维护管理新思路

机房管理员迫切需要一种新的维护管理方案来适应新形势下的Intranet／Internet环境下的教学需要,“影子系统（PowerShadow）”应运而生。它以新的思路、新的方案,为机房打造百毒不侵的黄金甲,让所有的管理员从繁复的体力劳动中解放出来,更好地服务于教学。     

独立学院计算机实验室的管理与维护

根据独立学院计算机实验教学的需要,针对如何管理和维护计算机实验室,提高软硬件运行的效率及确保满足各项上机操作实践教学的需要,做出了进一步总结和研究。     

Turbidimetric microbiological assay results calculated by a BASIC computer program

A BASIC computer program was used to calculate the results of microbiological vitamin assays. The program, which incorporates the official AOAC guidelines for microbiological methods, reduces the uncertainty inherent in manual curve plotting and interpolation and minimizes the human error of repetitive calculations. Because the BASIC programming language is well suited for use on self-contained personal computers, it can be easily adapted by small laboratories.     

Sample accountability quality assurance for the "Integrated Air Cancer Project" research program of the U.S. Environmental Protection Agency

A sample accountability quality assurance (QA) program is described for a field and laboratory research effort which resulted in collection of approximately 2000 samples for analysis by several EPA and contractor laboratories. A QA program was specifically developed for this research program to include sample transfer from collection site to storage maintenance, record development, transfer to researchers, and sample tracking at all stages. A sample identification system and sample custody records are described for field and laboratory application. The functions of a sample coordinator are also described as relating to sample custody, coordination of sample analysis with researchers, and development of computer record files to facilitate research and sample tracking.     

Analysis of fat-soluble vitamins. XIX. Collaborative studies on the chemical assay for vitamin D concentrates

In 1971, a chemical method for the assay of vitamin D in concentrates containing only vitamin D was collaboratively studied by 14 laboratories, using 6 different samples from 2 European manufacturers. On the basis of these results, the laboratories were divided into 2 groups: 5 with significant laboratory biases of greater than or equal to 2%, and 9 laboratories with nonsignificant bias. The 9 laboratories were subdivided into 2 groups which differed significantly as to reproducibility within laboratories. The reproducibility between laboratories, expressed as a standard deviation in per cent with 95% confidence limits, was 1.2% (confidence range 0.6-7.3) and 4.7% (confidence range 2.4-29.3) for 3 and 6 laboratories, respectively. A second collaborative test was performed in 1974, using 12 vitamin D resin samples in oil from 3 United States manufacturers, to compare 2 chemical vitamin D assay methods (with and without maleic anhydride) and to compare results from the chemical and biological methods; 9 laboratories participated in the chemical method study and 3 in the rat bioassay study. The correlation of results of the chemical method including maleic anhydride treatment and the rat bioassays was satisfactory. The reproducibility of the chemical method was about the same as that in the first collaborative test.     

Analysis of foods for iodine: interlaboratory study

An accurate, reproducible method for less than or equal to 1 ppm iodine in foods is required for nutritional labeling. In order to ascertain the current status of iodine analysis in foods, 7 samples, representing different food classes, were analyzed by 8 laboratories. Six laboratories used their modifications of the Ce-As-I catalytic method preceded by alkaline dry ashing. Two laboratories used neutron activation analysis (NAA), with differing radiochemical separations. The study showed wide discrepancy in analytical results. Mean relative standard deviation for all laboratories was 77.9% between laboratories; 19.1% within-laboratories. Laboratories using NAA had only slightly better precision than did laboratories using the chemical method. The lowest level reported on the entire group of samples ranged among laboratories from 0.0089 to 0.65 ppm. Figures reported by a laboratory are, in general, consistently high or consistently low. The only differences in methodology which may possibly correlate with level of iodine obtained are the use of NAA technique and use of manual, rather than automated, colorimetry.     

Semiautomated method for niacin and niacinamide in food products: collaborative study.

A collaborative study was conducted comparing a semiautomated colorimetric niacin method with a manual colorimetric and a microbiological method for 10 food products. Seven laboratories used the microbiological method, 7 laboratories used the manual colorimetric method, and 6 laboratories used the semiautomated method. The semiautomated method was more repeatable within a laboratory and more reproducible between laboratories than was either of the other methods. The semiautomated method results compared favorably with both the microbiological and manual colorimetric method results.     

Collaborative studies on cytogenetic and dominant lethal assays.

Two in vivo cytogenetic studies and one dominant lethal study were jointly conducted by members of government, academic, industrial, and independent commercial laboratories between 1970 and 1975 to determine the validity and reproducibility of the techniques. The cytogenetic studies consisted of preparations and analyses of bone marrow cells from male rats for chromosome abnormalities. In the first study, participants from 4 laboratories jointly prepared slides at a Food and Drug Administration (FDA) laboratory according to a prescribed procedure and independently analyzed the slides in their own laboratories. In the second study involving 6 laboratories, a workshop was held at Dow Chemical Co. to reduce scoring differences and to develop a joint protocol. All participants then independently performed the exact procedure in their own laboratories, using animals from a common source. In the dominant lethal study involving 6 laboratories, a workshop was held at the FDA to discuss protocol and to practice the technique. All participants then independently conducted the study in their own laboratories using rats and test chemicals from common sources. In all 3 studies, significant interlaboratory variability existed, and the differences varied with the parameters analyzed.     

International mycotoxin check sample program: Part I. Report on laboratory performance for determination of aflatoxins B1, B2, G1, and G2 in raw peanut meal, deoiled peanut meal, and yellow corn meal

Three aflatoxin-contaminated samples (raw peanut meal, deoiled peanut meal, and yellow corn meal) were analyzed by 121 laboratories in 31 countries. Sufficient data were obtained to permit a statistical comparison of the performance of laboratories using the BF, CB, and EEC methods and those using high performance liquid chromatography (HPLC) for quantitation. No significant differences were found between means for laboratories using these 4 methods for the analysis of raw peanut meal or yellow corn meal. However, for deoiled peanut meal, means were significantly different for laboratories using the BF method compared with the CB or EEC methods for B1 and B2, and for laboratories using the CB method compared with HPLC methods for G2.     

International mycotoxin check sample program: Part II. Report on laboratory performance for determination of aflatoxin M1 in milk

A sample of aflatoxin M1-contaminated lyophilized cow's milk was analyzed by 80 laboratories in 30 countries. Sufficient data were obtained to permit a statistical comparison of the performance of laboratories using AOAC methods I and II and those using high performance liquid chromatography for quantitation. A significant difference was noted between means for laboratories using AOAC method I as opposed to those using HPLC methods. Overall reproducibility (between- plus within-laboratory precision) was best for laboratories using HPLC methods and poorest for those using AOAC method II.     

Interlaboratory study of acid orange 12 dye binding for measuring protein in meat.

Six samples of beef and pork were analyzed by 4 laboratories, using the dye binding method. Dye binding protein was calculated by using a dye binding capacity of meat of 0.410 mg dye bound/g protein. Correlations of 0.976, 0.987, 0.996, and 0.995 were found between dye binding and Kjeldahl protein values. An analysis of covariance showed that the slopes of regression between dye binding and Kjeldahl protein for 3 laboratories were not significantly different at the 5% level. The adjusted means of the regression lines for the same 3 laboratories were significantly different at the 1% level. The results show that 3 of the laboratories were finding the same relationship between dye binding and Kjeldahl protein but were not in calibration with one another.