68 resultados para Multiple input and multiple output autonomous flight systems


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The implementation of various management systems and standards has become an important activity for organisations irrespective of their size, sector or nature of the business. Even with a history of implementing change across the organisation, managers continue to experience resistance and challenges when implementing and maintaining the systems/standards, whether they be in quality, occupational health and safety, environmental or any other area. Based on a major research project recently completed, this paper presents the critical success factors for successful implementation of an environmental management system. The project involved three phases of fieldwork: preliminary interviews, a questionnaire survey and in-depth interviews. A brief summary of the findings from each of these phases of research is presented. Based on the findings, the paper discusses the critical success factors for the successful implementation and maintenance of EMS.

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It is commonly assumed that solar hot water systems save energy and reduce greenhouse gas emissions. The net energy requirement of solar hot water systems has rarely been analysed, including their embodied energy. The extent to which solar hot water systems save energy compared to conventional systems in Melbourne, Australia, is shown through a comparative net energy analysis. It was shown that the embodied energy component of the net energy requirement of solar and conventional hot water systems was insignificant. The solar hot water systems provided a net energy saving compared to the conventional systems after 0.5–2 years, for electric- and gas-boosted systems respectively.

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It is commonly assumed that solar hot water systems save energy and reduce greenhouse gas emissions. Very rarely has the life-cycle energy requirements of solar hot water systems been analysed, including their embodied energy. The extent to which solar hot water systems save energy compared to conventional systems in Melbourne, Australia, is shown through a comparative net energy analysis. The solar systems provided a net energy saving compared to the conventional systems after 0.5 to 2 years, for electricity and gas systems respectively.

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In wireless mobile computing, location management is introduced whenever users move from one place to another. In order to track a mobile user, the system must store information about their current location and report new locations to a home base station. Numerous techniques have been proposed to optimally manage the location of mobile hosts in mobile networks. This paper attempts to present a more structured and comprehensive analysis of the current location management techniques architectures and their technology enablers. We discuss some of the principal issues involved in location management and present a taxonomy and survey of location management strategies that have been proposed in the literature over the years for mobile computing systems.

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Level 1 evidence for management of patients with stroke in a dedicated Stroke Care Unit (SCU) demonstrates improved outcomes by about 20%. It has been estimated that 21% of Australian hospitals provide an SCU and that these SCUs are mainly located in either metropolitan sites and/or in hospitals with more than 300 beds. To address equity issues related to access to SCUs, the National Stroke Foundation and the Australian Government undertook the National Stroke Units Program. One program outcome was the development of a conceptual model of acute stroke service delivery. The development process and initial evaluation of the model are described. Use of the model to increase capacity within the health care system to treat stroke is discussed.

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This study examines attitudes of U.S.-based Academy of Marketing Science members toward teaching, research, participation in administration (including service), and academic promotional issues. Individuals were grouped using Ward’s and K-means clustering procedures, which revealed four groups—established academics, research-focused academics, less satisfied midcareer academics, and satisfied teachers. Clusters were further profiled according to the amount of time spent on teaching, research, and administration; research output; and individual demographic and institutional characteristics. Overall, clusters were generally dissatisfied with a range of work-related issues, with workload stress appearing as an issue that needs to be addressed within marketing academia.

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The Australasian tertiary education sector has undergone significant organizational and cultural changes, which have increased pressures on academics to undertake a range of additional activities while at the same time improving research performance. These pressures impact on individuals in different ways, although there may be some groups or clusters of individuals within institutions with common characteristics. Managers may need to develop different sets of management strategies and policies to assist each group of academics to deal better with these pressures and improve their individual performance. The paper examines Australasian marketing academics’ perceptions of their work environments and whether these perceptions result in differing clusters of individuals who might also vary based on their research performance, time allocated to different academic roles, and their professional and demographic characteristics. Sixty-eight members of the Australian and New Zealand Academy of Marketing responded to a survey using a modified version of an instrument developed by Diamantopoulos et al. (1992). K-means clustering procedure identified four groups of academics – “Traditional Academics,” “Satisfied Professors,” “Newer Academics,” and “Satisfied Researchers.” While only a few significant differences among clusters were identified in relation to time allocated to academic activities and research performance, it appears that clusters differ on several professional and demographic characteristics.

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The increasing complexity and interconnectedness of critical infrastructure systems, including the information systems and communication networks that support their existence and functionality, poses questions and challenges. Particularly, in terms of modelling and analysis of the security, survivability and ultimately reliability and continued availability of critical infrastructure systems and the services they deliver to modern society. The focus of this research enquiry is with regard to critiquing and modelling critical infrastructure systems. There are numerous systems analyse and modelling approaches that outline any number of differing methodological approaches, each with their own characteristics, expertise, strengths and weaknesses. The intention of this research is to investigate the merit of applying a ‘softer’ approach to critical infrastructure system security analysis and modelling that broadly views the systems in holistic terms, including their relationships with other systems. The intention is not to discuss or criticise existing research applying quantitative approaches, but to discuss a ‘softer’ system analysis and modelling approach in a security context that is adaptable to analysis modelling of critical infrastructure systems.