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关键词： 道路交通事故   物证检验鉴定  

摘要： 以道路交通事故所具有的特点及事故处理中常见问题为基础,阐述物证检验鉴定结论在道路交通事故中的作用。

关键词： 溶血现象   干扰作用   生化检验  

摘要： 目的探讨、分析溶血现象在生化检验中的干扰作用。方法以2012年7月至2012年8月期间于我院检验科进行生化检验的60例正常人为研究对象,观察未溶血及溶血后标本的谷丙转氨酶(ALT)、总胆红素(TBIL)、谷草转氨酶(AST)、总蛋白(TP)、总胆固醇(CHO)、葡萄糖(GLU)、尿酸(UA)、三酰甘油(TG)、尿素氮(BUN)、乳酸脱氢酶(LDH)等10项常见的生化指标,并对各指标进行统计学分析,比较标本溶血前、后各检测指标的差异。结果标本中溶血前、后ALT、TBIL、AST、TP、GLU、UA、LDH的含量存在比较显著的差异,但是溶血对TG、CHO、BUN的检测值几乎无影响。结论溶血现象对生化检验的很多指标都有干扰作用,排除溶血的干扰对检验结果的准确性至关重要。

关键词： 安全文化   家禽养殖企业   禽流感   防控意愿   结构方程模型  

摘要： 本文以江苏省210位家禽养殖企业员工为样本,分析并基于结构方程模型实证检验了家禽养殖企业安全文化对员工禽流感防控意愿形成过程的作用机理。研究结果表明:安全氛围是安全文化中正向影响员工禽流感防控意愿的显著因子。安全氛围通过正向影响员工的结果信念和结果评价来形成员工的禽流感防控态度,通过正向影响员工的控制信念和知觉强度来影响员工的防控知觉行为控制,并最终正向影响员工的禽流感防控意愿。此外,员工感知的工友实施禽流感防控操作规程努力程度对安全氛围形成有较大的正向影响。

关键词： 微生物检验   医院感染   监控   临床意义  

摘要： 目的:对微生物检验在医院感染监控中的作用进行分析。方法:选取2010年5月-2012年7月医院收治的在医院进行就诊的患者68例;随机分为两组,甲组患者32例,采用常规性护理方法;乙组患者36例,在常规护理基础上,采用微生物针对检验进行监控护理,对比两组患者感染现象。结果:乙组患者在住院治疗期间的微生物感染情况显著高于甲组患者,差异性显著,具有统计学意义(P<0.05)。结论:对患者进行微生物检验检测,能有效预防医院感染,并及时发现和治疗。

关键词： 食品   标准菌株   质量控制  

摘要： 在微生物检验工作中常需要使用标准菌种作为阳性或阴性对照,本文根据食品微生物检验的特点及保种目的,探讨了标准菌种的购买、验收、标识、转种、确认、领取及销毁等程序,规范了标准菌种管理以保证其来源的可靠性和溯源性。

关键词： Sample pooling   Biomarker search   Statistical learning methods   Partial least squares discriminant analysis   Prediction error  

摘要： RNA-sample pooling is sometimes inevitable, but should be avoided in classification tasks like biomarker studies. Our simulation framework investigates a two-class classification study based on gene expression profiles to point out how strong the outcomes of single sample designs differ to those of pooling designs. The results show how the effects of pooling depend on pool size, discriminating pattern, number of informative features and the statistical learning method used (support vector machines with linear and radial kernel, random forest (RF), linear discriminant analysis, powered partial least squares discriminant analysis (PPLS-DA) and partial least squares discriminant analysis (PLS-DA)). As a measure for the pooling effect, we consider prediction error (PE) and the coincidence of important feature sets for classification based on PLS-DA, PPLS-DA and RF. In general, PPLS-DA and PLS-DA show constant PE with increasing pool size and low PE for patterns for which the convex hull of one class is not a cover of the other class. The coincidence of important feature sets is larger for PLS-DA and PPLS-DA as it is for RF. RF shows the best results for patterns in which the convex hull of one class is a cover of the other class, but these depend strongly on the pool size. We complete the PE results with experimental data which we pool artificially. The PE of PPLS-DA and PLS-DA are again least influenced by pooling and are low. Additionally, we show under which assumption the PLS-DA loading weights, as a measure for importance of features regarding classification, are equal for the different designs.

关键词： Crude oil   Photoionization   FTICR mass spectrometry   Principal component analysis   Hierarchical clustering analysis   Geochemistry  

摘要： Characterization and classification of crude oil is done following different approaches. Geochemistry investigations on one hand are focused on finding and quantifying markers characteristic of the oil, to provide detailed information about the geological history, the conditions of sedimentation of the oil and of the source rock. On the other hand Fourier transform ion cyclotron mass spectrometry (FTICR MS) has been proved to be a powerful tool in the analysis of crude oil at the molecular level. In this study, a group of fourteen samples of crude oil coming from different fields around the world has been analyzed through Atmospheric Pressure Photoionization (APPI) coupled to FTICR MS. Since the comparison of the many complex APPI FTICR mass spectra is complicated, we have applied statistical methods such as Principal Component Analysis (PCA) and hierarchical clustering (HCA) considering the peaks of the mass spectra. The statistical analysis has found to be able to group the oils according to the well where they have been extracted and from their geographical origin. (C) 2012 Elsevier B.V. All rights reserved.

关键词： Applications in subject areas   Elementary education   Computer-mediated communication  

摘要： Student academic performance and social competence are influenced positively by parent involvement;effective parent-teacher communication not builds parent reliance on a school, it enhances parent knowledge of raising children. As information technology develops rapidly, it is already a trend that e-communication is replacing traditional paper communication. Mobile phone messages could be a convenience tool to issue notices to parents and reduce conflicts due to negligence such as missing phone calls, forgotten alerts, etc. Therefore, this study investigates teacher behavior of adopting mobile phone messages as a parent-teacher communication medium by applying the TAM, C-TAM-TPB, and UTAUT models. The result posits that attitude should be treated as a mediator between perceived usefulness and behavior intention, even if the user perceives the new device is useful but does not hold a positive attitude toward the device. On the other hand, to most subjects, opinions from family and friends and expectations from superiors are important considerations when making decisions;those thoughts affect directly the intention to use the new system. The results also suggest that infrastructure maturity for mobile phone messaging improves intention to use, but actual use behavior relates to school policies, not teacher intention. To implement a messaging system successfully, authorities should provide inducements that not only attract teachers to use the system, but that foster positive attitudes toward the messaging system to further increase use intention. (C) 2012 Elsevier Ltd. All rights reserved.

摘要： Objective With the International Classification of Functioning, Disability and Health (ICF), the impact of health conditions on functioning and disability can be described. A Comprehensive and a Brief ICF Core Set for osteoarthritis (OA) were developed. Our specific aims were to validate the Brief ICF Core Set for OA using a novel approach, i.e., to identify ICF categories that best explain patients' functioning, and to propose a statistically validated version. Methods We performed a psychometric study using group lasso regression on data from a convenience sample of 879 OA patients from 20 countries. The general health subscale of the Medical Outcomes Study Short Form 36 was used as a dependent variable, and all ICF categories of the Comprehensive ICF Core Set for OA and some sociodemographic and disease-specific characteristics were used as independent variables. The most relevant ICF categories were identified as those showing a significant effect based on the pointwise 90% confidence intervals resulting from 1,000 bootstrap trials. Results The set of ICF categories that best explains patients' functioning consists of 4 body functions, 2 body structures, 2 activities and participation, and 3 environmental factors. Twelve of the original 13 Brief ICF Core Set categories were confirmed, and 3 additional ICF categories were identified. Conclusion Our findings reassure the validity of the Brief ICF Core Set for OA. The statistically validated Core Set with the additional statistically derived ICF categories will likely perform better with regard to discrimination and sensitivity to change in studies and trials, and should be further explored in the future.

ISBN: (数字)9781467359337

摘要： This study analyzes the role of collaborative information technology (CIT) on team performance. We propose that the role of CIT can be more clearly understood by examining how it functions in the particular context of departure of an individual from a work team. Using an analytical model and laboratory experiments, we show that CIT serves to moderate the negative impact of a team member’s departure, and it can play an indirect but potentially significant role in enhancing group performance. We explain why and how team performance benefits from CIT when departure occurs. Moreover, we employ transactive memory theory to explain how individuals develop and exchange knowledge in a group and how skills and knowledge can be lost due to departure.