Government management of two media-facilitated crises involving dioxin contamination of food     

Jacob CJ  Lok C  Morley K  Powell DA 《Public understanding of science (Bristol, England)》2011,20(2):261-269

Incidents become crises through a constant and intense public scrutiny facilitated by the media. Two incidents involving dioxin contamination of food led to crises in Belgium and the Republic of Ireland in 1999 and 2008, respectively. Thought to cause cancer in humans, dioxins reached the food supply in both incidents through the contamination of fat used for animal feed. The food and agricultural industries connected to each incident relied on crisis management activities of federal governments to limit adverse public reaction. Analysis of the management of the two crises by their respective federal governments, and a subsequent review of crisis management literature, led to the development of an effective crisis management model. Such a model, appropriately employed, may insulate industries associated with a crisis against damaged reputations and financial loss.  相似文献   

A framework for ICT-enabled real-time production planning and control     

Emrah Arica Daryl J.Powell 《上海大学学报(英文版)》2014,(2):158-164

This paper aims to develop a conceptual framework for real-time production planning and control（PPC）.Firstly,we discuss the most prominently applied contemporary information and communication technologies for PPC.Enterprise resource planning（ERP） systems that integrate the value chain in an enterprise,manufacturing execution systems that manage and control the production on shopfloor,and advanced planning and scheduling（APS）systems that develop solutions for complex planning problems are the planning and control systems that have been analyzed.We emphasize the application of radio frequency identification as the most advanced and promising emerging real-time data capture technology that is currently available to manufacturers.Having analyzed the features and shortcomings of the individual systems perse,and by considering the advantages that may be realized through effective integration of these otherwise discrete systems,we propose a framework for real-time PPC.  相似文献   

Identifying Key Features of Effective Active Learning: The Effects of Writing and Peer Discussion     

Debra L. Linton  Wiline M. Pangle  Kevin H. Wyatt  Karli N. Powell  Rachel E. Sherwood 《CBE life sciences education》2014,13(3):469-477

We investigated some of the key features of effective active learning by comparing the outcomes of three different methods of implementing active-learning exercises in a majors introductory biology course. Students completed activities in one of three treatments: discussion, writing, and discussion + writing. Treatments were rotated weekly between three sections taught by three different instructors in a full factorial design. The data set was analyzed by generalized linear mixed-effect models with three independent variables: student aptitude, treatment, and instructor, and three dependent (assessment) variables: change in score on pre- and postactivity clicker questions, and coding scores on in-class writing and exam essays. All independent variables had significant effects on student performance for at least one of the dependent variables. Students with higher aptitude scored higher on all assessments. Student scores were higher on exam essay questions when the activity was implemented with a writing component compared with peer discussion only. There was a significant effect of instructor, with instructors showing different degrees of effectiveness with active-learning techniques. We suggest that individual writing should be implemented as part of active learning whenever possible and that instructors may need training and practice to become effective with active learning.  相似文献   

歌唱呼吸与情感的联系   总被引：1，自引：0，他引：1  

笪方能 《新疆师范大学学报(哲学社会科学版)》2003,24(2):142-145

自16世纪美声唱法诞生以来，诸多声乐教育家认为：歌唱的动力是呼吸。“谁懂得了呼吸，谁就掌握了歌唱。”由此可见，呼吸在声乐演唱中的重要性。而歌唱发声的技巧是为歌唱的内容服务的，歌唱蕴藏着丰富的情感要素。但如何借助作品本身的情感因素合理地运用具体恰当的呼吸演唱好作品，充分体现作品的情感，使听众产生情感上的共鸣是声乐教学与演唱的目的之一。  相似文献   

Launch of the steamship Himalaya     

F.R.S. Powell 《Journal of The Franklin Institute》1838,26(3):187-188

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A Handbook for Social Science Field Research: Essays and Bibliographic Sources on Research Design and Methods.     

Ronald R. Powell 《Library & information science research》2007

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The public library service     

M.J. Powell O.B.E. M.A. A.L.A. 《British Journal of Religious Education》1936,3(3):160-164

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Recent experience of the application of a commercial data base management system (ADABAS) to a scientific data bank (ECDIN)     

William G. Town  John Powell  Peter R. Huitson 《Information processing & management》1980,16(2):91-108

The ECDIN (Environmental Chemicals Data and Information Network) project started in 1973. During the pilot phase of operation the feasibility of the system was demonstrated using a data base of 4000 compounds and the SIMAS information retrieval system. It was quickly realised that for ECDIN data management was as important as information retrieval and in November 1977, after a study of available software, the ADABAS data base management system was installed at JRC Ispra for ECDIN and other JRC data banks. A design exercise for the ECDIN ADABAS data base has been completed and parts of the existing ECDIN data base have been converted to the new system. The problems encountered and the solutions adopted are discussed. The user interface to ECDIN is still under development. When fully operational ECDIN will be available through EURONET to both casual and specialist users and, in consequence, at least two levels of user interface will be required: (a) a user friendly conversational language designed for the casual user and capable of dealing with the more common types of question, (b) a sophisticated query language capable of answering the more difficult questions, producing “one-off” reports and probably requiring both a specialist knowledge of the data base and a programmer oriented background. The first tentative steps in this direction are described.  相似文献   

Activity and Behavioral Development in Stunted and Nonstunted Children and Response to Nutritional Supplementation     

Julie M. Meeks Gardner  Sally M. Grantham-McGregor  Susan M. Chang  John H. Himes  Christine A. Powell 《Child development》1995,66(6):1785-1797

It is frequently assumed that undernutrition in young children leads to poor development through reduced activity. 3 groups of 26 1-year-old stunted children were studied: nutritional supplementation, supplementation with psychosocial stimulation, and controls. 26 nonstunted comparison children were also studied. Activity levels were measured by extensive observations in the homes, and development using 4 subscales of the Griffith's Mental Development Scales. Initially, stunted children were less active than nonstunted ones ( p < .01), but after 6 months they caught up regardless of treatment. The mental ages of the stunted children were lower than those of the nonstunted children initially, and improved with either treatment. Initially, activity levels made a significant contribution to the variance in the locomotor subscale only, but not 6 months later. Activity did not predict change in development over 6 or 12 months, nor did change in activity over 6 months predict change in development over 12 months.  相似文献   

Don''''t Punish Every Mistake     

Colin Powell 《海外英语》2004,(12):1

In one of my assignments as a young infantry(步兵)officer,I was sent tothe 48th Infantry near Frankfurt,Germany.In those days our prize weaponwas a huge 280-mm atomic cannon. One day Captain Tom Miller assigned my platoon to guard a 280.Ialerted my men,loaded my.45 caliber(口径)pistol and jumped into my jeep.I  相似文献