骇客帝国

《骇客帝国》是由Shiny Entertainment开发的一款第三人称动作射击游戏。同Shiny Entertainment先前开发制作的游戏相比，比如《英雄本色》（Max Payne）和《捍卫正义》（Dead to Rights），《骇客帝国》在保留传统风格的基础上有所改进，让玩家在游戏中既可以控制精力充沛且致使的飞行员Niobe，也可以控制武器专家Ghost。此外，游戏中的关卡还分为打斗关卡、飞车追逐关卡以及飞行关卡，让玩家在游戏的时候可以获得不同的感受。     

Response surface models for effects of temperature, pH, and previous growth pH on growth kinetics of Salmonella Typhimurium in brain heart infusion broth

Response surface models were developed for effects of temperature (15 to 40 degrees C), pH (5.2 to 7.4), and previous growth pH (5.7 to 8.6) on lag time (lambda) and specific growth rate (mu) of Salmonella Typhimurium in brain heart infusion broth (BHIB). Seventy-five growth curves for model development and 30 growth curves for model validation were fit to a two-phase linear growth model to obtain direct estimates of lambda and mu of Salmonella Typhimurium in BHIB. Response surface models for natural logarithm transformations of lambda and mu as a function of temperature, pH, and previous growth pH were obtained by regression analysis. Previous growth pH did not alter (P > 0.05) or interact with temperature or pH to alter subsequent growth kinetics of Salmonella Typhimurium. However, lambda and mu of Salmonella Typhimurium in BHIB were affected (P < 0.05) by linear and quadratic effects of temperature and pH. The models were validated against data not used in their development. Mean absolute relative error of predictions (model accuracy) was 7.8% for lambda and 6.6% for mu. Median relative error of predictions (model bias) was -1.8% for lambda and -2.8% for mu. Results of the current study indicated that the models developed accurately predicted growth kinetics of Salmonella Typhimurium in BHIB within the matrix of factors modeled and that the range of previous growth pH (5.7 to 8.6) investigated did not alter the subsequent growth kinetics of Salmonella Typhimurium in BHIB.     

Predictive models for growth of Salmonella typhimurium DT104 from low and high initial density on ground chicken with a natural microflora

A single strain (ATCC 700408) of Salmonella typhimurium DT104 was used to investigate and model growth from a low (1.12 log10 mpn g(-1)) and high (3.7 log10 cfu g(-1)) initial density on ground chicken with a natural microflora. Kinetic data for growth of the pathogen on ground chicken were fit to a primary model to determine lag time (lambda), maximum specific growth rate (mu) and maximum population density (Nmax). Secondary models for lambda, mu and Nmax, as a function of temperature (10-40 degrees C), were developed and compared among initial densities. Variation of pathogen growth among replicates (n=4 or 5) was higher at 10-18 degrees C than at 22-40 degrees C and was higher for Nmax than lambda and mu. Prediction problems were observed when secondary models developed with one initial density were used to predict lambda, mu and Nmax from the other initial density, especially at 10-18 degrees C and for Nmax. These results indicated that variation of growth among replicate challenge studies and initial density are important factors to consider when developing predictive models for growth of S. typhimurium DT104 on ground chicken with a natural microflora.     

Prevalence and antimicrobial resistance of Salmonella recovered from processed poultry

This study was conducted to determine the prevalence and antimicrobial resistance of Salmonella isolates recovered from processed poultry. Four hundred eighty pre- and postchill whole broiler chicken carcasses were collected from a poultry processing plant between July 2004 and June 2005. Water samples also were collected at the entrance and exit of the chiller. After preenrichment, carcass and water samples were analyzed for the presence of Salmonella using the automated BAX system followed by traditional culture methods. The proportions of pre- and postchill carcasses that were positive for Salmonella were 88.4 and 84.1%, respectively. Ninety-two percent of water samples collected at the entrance of the chiller were positive for Salmonella, but all exit samples were negative. There was no significant difference in the prevalence of Salmonella between pre- and postchill carcasses (P > 0.05). Salmonella isolates recovered were serotyped and tested for susceptibility to antimicrobials. Thirteen serotypes were identified; the most common were Salmonella Kentucky (59.5%) and Salmonella Typhimurium (17.8%). Three hundred thirty-nine (79.8%) of the isolates were resistant to at least one antimicrobial, and 53.4% were resistant to three or more antimicrobials. Resistance was most often observed to tetracycline (73.4% of isolates), ampicillin (52.9%), amoxicillin-clavulanic acid (52%), ceftiofur (51.7%), streptomycin (35.2%), and sulfisoxazole (21.8%). These results indicate the high prevalence of Salmonella contamination in whole broiler carcasses, and a large number of these Salmonella isolates were resistant to commonly used antimicrobials.     

固体燃料用于油田上生产水蒸汽

在南得克萨斯,科诺科(Conoco)公司成功地运转了一台5000万BTU/时的多固体流化床燃烧室(Multi-Solids-Fluid BedCombustor简称为MS-FBC)水蒸汽发生器。这套MS-FBC是水蒸汽提取(Steamf-lood)中试项目的一部分,该项目位于Ma-verick县的San Antonic西南125哩。科诺科的MS-FBC生产压力为2450磅/吋~2、     

管理信息系统的结构、类型和综合

本文提出一个定义 MIS 设计中各种总体设计模型的机制。主要依据对 MIS 的一般结构—各种基本功能和它们之间的关系—的识别,作为这种结构的实例定义的 MIS 的类型,以及对某一类型内和若干类型之间的各种可能的综合程度给予的说明。     

浓缩的都是精品! 天生自带萌基因的浓缩版柯利犬

正提到喜乐蒂牧羊犬很多人第一印象可能想到的是苏格兰牧羊犬,它们的确长得特别相似,但是两者的区别却很明显。外在体型的大小就可以很容易判断出来,喜乐蒂牧羊犬明显会小于苏格兰牧羊犬。它们性格忠诚、热情、开朗顺从,非常容易训练。于海富YOTOINCLUDEPICTURE乐同宠物驯导师·海富国家高级宠物驯导师多次与国外顶级驯导师面     

那些规则它们需要你来教 好习惯需要从小养成!

正很多主人在养狗的过程中发现,为什么那些又可爱又乖巧的狗狗永远是别人家的狗,而那些拥有各种坏习惯的狗狗偏偏是自己家的呢?其实不然,我们换个角度考虑,对于它们适应人类社会的要求,实则是我们的生存规则,而不是它们的生存规则。我们强行希望它们遵守我们的要求,那么我们是否有在它们幼年时期就教会它们规则呢?如果没有你又有什么理由去责怪它们!     

优化干燥参数

现行的能量价格正在促使设计工程师提出在纸机干燥系统中使用能量的优化方案。这种优化必须包括设计上的,但也包括生产操作上的。一旦纸机开始运行,我们不能让操作人员去决定如何使用纸机可能提供的干燥潜能。     

Validation of a tertiary model for predicting variation of Salmonella typhimurium DT104 (ATCC 700408) growth from a low initial density on ground chicken breast meat with a competitive microflora

Growth of a multiple antibiotic-resistant strain (ATCC 700408) of Salmonella Typhimurium definitive phage type 104 (DT104) from a low initial density (10(0.6) most probable number [MPN] or CFU/g) on ground chicken breast meat with a competitive microflora was investigated and modeled as a function of time and temperature (10 to 40 degrees C). MPN and viable counts (CFU) on a selective medium with four antibiotics enumerated the pathogen. Data from five replicate challenge studies per temperature were combined and fit to a primary model to determine maximum specific growth rate (micro), maximum population density (Nmax), and the 95% prediction interval (PI). Nonlinear regression was used to obtain secondary models as a function of temperature for micro, Nmax, and PI, which ranged from 0.04 to 0.4 h(-1), 1.6 to 9.4 log MPN or CFU/g, and 1.4 to 2.4 log MPN or CFU/g, respectively. Secondary models were combined with the primary model to create a tertiary model for predicting variation (95% PI) of pathogen growth among batches of ground chicken breast meat with a competitive microflora. The criterion for acceptable model performance was that 90% of observed MPN or CFU data had to be in the 95% PI predicted by the tertiary model. For data (n=344) used in model development, 93% of observed MPN and CFU data were in the 95% PI predicted by the tertiary model, whereas for data (n=236) not used in model development but collected using the same methods, 94% of observed MPN and CFU data were in the 95% PI predicted by the tertiary model. Thus, the tertiary model was successfully verified against dependent data and validated against independent data for predicting variation of Salmonella Typhimurium DT104 growth among batches of ground chicken breast meat with a competitive microflora and from a low initial density.