北社区医院扩建,印第安纳波利斯,美国

<正>坐落于美国印第安纳州印第安纳波利斯市的北社区医院进行了规模为9.3万m2的扩建翻修工程,其中6层的住院楼是此项工程的核心。该工程由全球顶级医疗规划设计公司RTKL设计。扩建后的医     

千叶院的数字建构——徐州彭城一号展示中心设计

<正>项目基地位于徐州市鼓楼区彭城一号时尚休闲商业广场,地处市中心核心商圈。"彭城一号"是徐州城建重点工程项目和城市十大商圈之一,业主希望我们能在商业广场沿富庶街的入口区域设计一个标志性建筑,兼具展示中心的功能。     

新加坡博览地铁站

<正>车站与机场常常是旅客抵达一座城市最先体验的建筑,因而象征着"城市门户"。博览地铁站是旅客沿樟宜机场快线抵达新加坡城所经的首个MRT地铁站,同时也是新加坡博览中心的配套服     

日本横滨太阳城公寓

<正>近十几年,日本养老方式正在悄然改变。以前老年人通常在一个大家庭中与儿女以及孙辈们共同生活,而现在他们中的不少人开始尝试安度晚年的新方式。许多老年人倾向于居住在具有酒店式福利设施和大片草地的独立社区,并乐于参与各类社交活动。     

In situ assessment of biodegradation potential using biotraps amended with 13C-labeled benzene or toluene

Stable isotope fractionation analysis of an aquifer heavily contaminated with benzene (up to 850 mg L(-1)) and toluene (up to 50 mg L(-1)) at a former hydrogenation plant in Zeitz (Saxonia, Germany) has suggested that significant biodegradation of toluene was occurring. However, clear evidence of benzene biodegradation has been lacking at this site. Determining the fate of benzene is often a determining factor in regulatory approval of a risk-based management strategy. The objective of the work described here was the demonstration of a new tool that can be used to provide proof of biodegradation of benzene or other organics by indigenous microorganisms under actual aquifer conditions. Unique in situ biotraps containing Bio-Sep beads, amended with 13C-labeled or 12C nonlabeled benzene and toluene, were deployed at the Zeitz site for 32 days in an existing groundwater monitoring well and used to collect and enrich microbial biofilms. Lipid biomarkers or remaining substrate was extracted from the beads and analyzed by mass spectrometry and molecular methods. Isotopic analysis of the remaining amounts of 13C-labeled contaminants (about 15-18% of the initial loading) showed no alteration of the 12C/13C ratio during incubation. Therefore, no measurable exchange of labeled compounds in the beads by the nonlabeled compounds in the aquifer materials occurred. Isotopic ratio analysis of microbial lipid fatty acids (as methyl ester derivatives) from labeled benzene- and toluene-amended biotraps showed 13C enrichment in several fatty acids of up to delta (13C) 13400%o, clearly verifying benzene and toluene biodegradation and the transformation of the labeled carbon into biomass by indigenous organisms under aquifer conditions. Fatty acid profiles of total lipid fatty acids and the phospholipid fatty acid fraction and their isotopic composition showed significant differences between benzene- and toluene-amended biotraps, suggesting that different microbial communities were involved in the biodegradation of the two compounds.     

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.     

首尔国立大学博物馆

首尔国立大学博物馆的建造,是为加强首尔国立大学校园和社区间的关系．并作为二者之间连接的纽带。同样．也正是这种空间上的联系决定了该建筑的形态。建筑从校园的最高处穿过,为社区和校园之间建立起一条人行的联系通道。同时,由于建造产生的悬空区域是以混凝土材质为支撑,且建筑外壳为钢悬臂结构,可以根据内部旋转通道和外部地形起伏进行整体配合。     

Transcranial ultrasound focus reconstruction with phase and amplitude correction

Therapeutic and diagnostic ultrasound procedures performed noninvasively through the skull require a reliable method for maintaining acoustic focus integrity after transmission through layered bone structures. This study used a multiple-element, phased-array transducer to reconstruct ultrasound foci through the human skull by amplitude and phase correction. It was previously demonstrated that adaptive phase correction using a multiple-element, focused transducer array yields a significant correction to an acoustic field that has been distorted by the heterogeneities of the skull bone. The introduction of amplitude correction, in a regime in which acoustic pressures from individual transducer array elements are adjusted to be normalized at the focus, has demonstrated a 6% (-0.27 dB) average decrease in acoustic sidelobe acoustic intensity relative to the focal intensity and a 2% (-0.09 dB) average decrease in the full-width-at-half-maximum (FWHM) of the acoustic intensity profile at the focus. These improvements come at the expense of significant ultrasound intensity loss--as much as 30% lower (-1.55 dB)--at the focus because the amplitude correction method requires that, at constant power, a larger proportion of energy is absorbed or reflected by regions of the skull that transmit less energy. In contrast, a second correction method that distributes pressure amplitudes such that the sections of the skull which transmit more ultrasound energy are exposed with higher ultrasound intensities has demonstrated an average sidelobe intensity decrease of 3% (-0.13 dB) with no change in the FWHM at the focus. On average, there was a 2% (0.09 dB) increase in the acoustic intensity at the focus for this inverse amplitude correction method. These results indicate that amplitude correction according to the transmission properties of various segments of the skull have a clear effect on ultrasound energy throughput into a target site within the brain parenchyma.     

面孔和指纹识别

忘记密码吧,你不需要再记住它们了。相反地,你只需要舒舒服服地安坐在转椅上,等待PC识别你的面孔并把你登陆到网络上去;或者是将你的一个手指放在键盘上以便能够访问一份秘密的内部文档。这不是一段电影情节,而是生物检测学——一种分析人体物理特征的科学。生物检测安全技术是一种可行的安全检验手段,因为我们每一个人都具有唯一的、可测量的、而且计算机系统也能够验证的特征。     

网络大玩家

万能机器人 我敢肯定，那是人们心目中的神奇玩艺儿，不过，谁不想要个机器人呢？他能提醒你“当心!”。还能按时准备好午餐，做梦吧，如今的机