Assessing Engineering Resilience for Systems with Multiple Performance Measures

Recently, efforts to model and assess a system's resilience to disruptions due to environmental and adversarial threats have increased substantially. Researchers have investigated resilience in many disciplines, including sociology, psychology, computer networks, and engineering systems, to name a few. When assessing engineering system resilience, the resilience assessment typically considers a single performance measure, a disruption, a loss of performance, the time required to recover, or a combination of these elements. We define and use a resilient engineered system definition that separates system resilience into platform and mission resilience. Most complex systems have multiple performance measures; this research proposes using multiple objective decision analysis to assess system resilience for systems with multiple performance measures using two distinct methods. The first method quantifies platform resilience and includes resilience and other “ilities” directly in the value hierarchy, while the second method quantifies mission resilience and uses the “ilities” in the calculation of the expected mission performance for every performance measure in the value hierarchy. We illustrate the mission resilience method using a transportation systems‐of‐systems network with varying levels of resilience due to the level of connectivity and autonomy of the vehicles and platform resilience by using a notional military example. Our analysis found that it is necessary to quantify performance in context with specific mission(s) and scenario(s) under specific threat(s) and then use modeling and simulation to help determine the resilience of a system for a given set of conditions. The example demonstrates how incorporating system mission resilience can improve performance for some performance measures while negatively affecting others.     

企业并购过程中的组织认同行为

近年来,企业并购已经成为逐渐被人们所熟悉的一个词语。但是,很多企业在并购的过程中出现了大量的不适应性问题,甚至有的并购行为最终走向了失败。在并购发生前、发生过程中以及发生后员工的组织认同都受到并购行为的影响而发生变化。在并购发生后,组织认同的重新构建就成了决定并购成败的重要因素。     

Human and organizational factors in offshore safety

The role of human and organizational factors in predicting accidents and incidents has become of major interest to the UK offshore oil and gas industry. Some of these factors had been measured in an earlier study focusing on the role of risk perception in determining accident involvement. The current study sought to extend the methodology by focusing on perceptions of organizational factors that could have an impact on safety. A self-report questionnaire was developed and distributed to 11 installations operating on the UK Continental Shelf. A total of 722 were returned (33% response rate) from a representative sample of the offshore workforce on these installations. The study investigated the underlying structure and content of offshore employees' attitudes to safety, feelings of safety and satisfaction with safety measures. Correlations and step-wise regression analysis were used to test the relationships between measures. The results suggest that 'unsafe' behaviour is the 'best' predictor of accidents/near misses as measured by self-report data and that unsafe behaviour is, in turn, driven by perceptions of pressure for production.     

我国企业开展电子商务的障碍分析

本文运用辨证唯物主义的观点对我国企业开展电子商务的障碍从内因和外因两个方面进行阐述 ,作为电子商务主体的企业 ,其内在动因不足才是我国企业电子商务发展缓慢的根本原因所在 ,即内部障碍 ,主要表现为组织结构转型的困难及企业目标与个人目标的冲突等方面 ;企业的外部环境因素如安全认证 ,支付系统等的缺乏和不完善又构成企业电子商务发展的外部障碍     

Fairness and commitment to change in M&As: The mediating role of organizational identification

This paper examines the determinants of employees' affective commitment to change in the context of M&As. Based on the group engagement model (Tyler & Blader, 2000, 2003), we predicted that organizational identification with the newly formed organization mediates the positive impact of employees’ overall justice judgments and perceived change favorableness on affective commitment to change. We tested our predictions using data collected during an international merger. After controlling for country effects, results support our hypotheses. Implications for research and practice alike are discussed.     

The social construction of the meaning of acute stressors: a qualitative study of the personal accounts of police officers using a stress counselling service

The police profession is one in which acute stressors are encountered more frequently than in other occupations. Using the personal accounts of 35 police officers attending an in-house stress counselling clinic, the aim of the present study was to provide a qualitative examination of how the institutional context of policing influenced the ways in which acute stressors signified to individual police officers experiencing felt distress. Using the framework of Rational Emotive Behaviour Therapy as an analytical tool, it is argued that beliefs contributing to the experience of felt distress are related to the way in which policing as both an identity and an activity is constructed through the police organizational culture. Not only do these constructions influence the ways in which officers perceive themselves and their environments, but they also operate at the collective level to 'normalize' some emotional responses and to 'pathologize' others which, it is argued, could impact upon the outcomes of interventions such as stress counselling.     

美洲国家组织文化探析

美洲国家组织文化是一种特有的组织文化，其精神内核是一种共生质态的美洲一体化思想，一方面强调美洲各国的协调和共同发展，另一方面又高度认可各成员国的国家主权和自主对外交往。     

Critical understandings of child development: the development of a module for a post-qualifying certificate course in child protection studies

This paper explores the dilemmas involved in selecting appropriate theoretical and research material to help social workers in practice. Concentrating on the needs of those working in child care and protection, the paper uses the example of the area of child development knowledge to illustrate a process of presenting theory for practice. Specifically, the focus is on the redevelopment of a child development module for a post-qualifying certificate course in child care and protection that aims to encourage students to make critical use of current research and theory. The paper explains the reasoning behind the choice of attachment theory as the underpinning theoretical framework. It also addresses possible pitfalls in an uncritical use of such theory. The paper finally sets out how the module addresses the need social workers have for a framework to guide intervention in individual cases. The dimensions described are those of individual vulnerability or resilience and factors in the environment that are adverse or protective.     

Civic responsibility in a risk democracy

The National Research Council advocates for what they term a risk democracy, in which risk issues require community decision-making based on dialogue. This essay focuses on the promotion of civic responsibility in a risk democracy. Award-winning public awareness campaigns are analyzed to demonstrate how community partnerships and civic responsibility can improve community resilience. First, the role of a community in an emergency is discussed; second, the current focus of the Department of Homeland Security on prevention rather than preparation as illuminated by interviews with emergency managers is critically examined; and finally, public awareness campaigns are presented to show how personal and civic responsibility can assist in emergency planning and response.