Autonomic nervous system and subjective ratings of strain in air-traffic control

The paper is aimed at studying the perceived strain in professional air-traffic controllers both through self-evaluation and physiological indicators from the autonomic nervous system (ANS). The number of aircraft to be monitored was the main independent variable and could evolve at random within 1 and 10. Five ANS variables were recorded continuously in 25 participants while they handled real traffic: skin potential, skin conductance, skin blood flow, skin temperature and instantaneous heart rate. The tonic level of each physiological variable was averaged to match the times spent monitoring a constant number of aircraft. After the session, participants reacted in compliance with the NASA-TLX rating scale. Subjective ratings and physiological values were closely correlated to the number of aircraft, especially when data were standardized thus reducing inter-subjects differences in baseline levels. Results provide objective information to prevent air-traffic controllers from overloaded situations as well as to improve passengers’ safety.     

alt.metadata.health: Ontological Context for Data Use and Integration

Increasingly powerful computers and increased emphasis on evidence based decision making are creating a demand for merging and integrating data from different sources into a single data set. The demand for data is outstripping our ability to ensure data integrity, and sometimes analysis is performed on data that are not appropriate for the purposes they are used for. Here we describe problems that arise when data from different sources are merged, and we suggest that one way to add context to data so that users can make informed decisions about their ontological context is through ontology-based metadata. Examples of the problem are taken from health data with emphasis on difficulties in standardizing Emergency Room wait times. We describe eight fields that can be used to capture contextual metadata. These fields are captured using ethnographic methods from users and database stewards who frequently understand precisely how context and institutional usage have shaped interpretation of semantic fields. We argue that attaching a portable archive of ontological context to travel with data—based on information from users and developers—is a means of ensuring that data are integrated and compared in multiple contexts with greater integrity and more robust results.

关于Oracle数据库的安全访问及其备份管理探析

通过对Oracle数据库的安全访问与备份管理技术分析来对目前的技术与应用进行探讨,为企业提供更全面准确的思路,为实现企业的信息安全提供更多的理论依据.     

Formal modelling of organisational goals based on performance indicators

Every organisation exists or is created for the achievement of one or more goals. To ensure continued success, the organisation should monitor its performance with respect to the formulated goals. In practice the performance of an organisation is often evaluated by estimating its performance indicators. In most existing approaches for organisation modelling the relation between performance indicators and goals remains implicit. This paper proposes a formal framework for modelling goals based on performance indicators and defines mechanisms for establishing goal satisfaction, which enable evaluation of organisational performance. Methodological and analysis issues related to goals are also discussed in the paper. The described framework is a part of a general framework for organisation modelling and analysis.     

多指示剂复合pH敏感膜及其试验

采用多指示剂聚合构成 pH敏感膜 ,并用神经网络进行光谱处理 ,能有效扩大 pH的敏感范围 ,克服目前光纤化学 pH传感器量程小的缺陷 ,有助于该类传感器的实用化。     

高职《计算机文化基础》课程教学探讨

根据高职院校《计算机文化基础》课程的教学特点,结合本人三年来的教学实践,对该课程的教学内容与方法进行了探讨。     

CAD智能工程数据库系统

通过对共性工程数据及其关系的讨论,提出了一种CAD技术集成方案。采用基于C／S结构的分布式计算,引入知识工程,建立知识库,应用推机制,通过开发方便的操作工具,使得共性工程数据库中数据的使用具有智能化,从而方便设计人员的使用。     

基于Multi Agent的技术性贸易壁垒

技术性贸易壁垒成为阻碍我国出口的主要因素,建立高效的预警预测系统已经势在必行。结合MultiAgent和Ontology技术,在JADE开发平台的基础上,给出了系统的详细设计方案和实现的关键技术。     

船舶电缆密封技术

为了正确掌握船舶内置电缆密封技术，文中根据电缆密封装置的特点和具体设计要求，对常用的多种密封材料性能的优劣进行了分析，并展望密封材料及密封工艺的发展前景。     

基于边界扫描技术的抗混淆自适应测试算法

针对现有边界扫描测试快速测试算法存在征兆混淆现象的问题,在深入分析多种测试算法的基础上,提出一种抗混淆的自适应测试算法.首先,通过分析走步算法的特点,给出一种走步算法的改进方案.该方案在保证算法完备性指标不变的情况下,提高了算法的紧凑性指标.在此基础上,结合改良计数序列算法,生成抗混淆自适应测试算法.该算法解决了改良计数序列算法存在的征兆混淆问题,极大提高了算法的完备性指标,且紧凑性指标较好.