Speed control of separately excited dc motor using artificial intelligent approach

This paper presents the ability of Artificial Intelligent Neural Network ANNs for the separately excited dc motor drives. The mathematical model of the motor and neural network algorithm is derived. The controller consists two parts which is designed to estimate of motor speed and the other is which to generate a control signal for a converter. The separately excited dc motor has some advantages compare to the others type of motors and there are some special qualities that have in ANNs and because of that, ANNs can be trained to display the nonlinear relationship that the conventional tools could not implemented such as proportional-integral-differential (PID) controller. A neural network controller with learning technique based on back propagation algorithm is developed. These two neural are training by Levenberg�Marquardt. The effectiveness of the proposed method is verified by develop simulation model in MATLAB-Simulink program. The simulation results are presented to demonstrate the effectiveness and the proposed of this neural network controller produce significant improvement control performance and advantages of the control system DC motor with ANNs in comparison to the conventional controller without using ANNs

Organic Farming: Status, Issues and Prospects – A Review

This review paper attempts to bring together different issues in the light of recent developments in organic farming. The after effects of green revolution have encouraged the farmers to take up organic farming. This paper has reviewed the global and Indian scenario with reference to organic farming. In India, the cultivated land under certification is 2.8 Mha only. The key issues emerging in organic farming include yield reduction in conversion to organic farm, soil fertility enhancement, integration of livestock, certification constraints, ecology, marketing and policy support. The potential for organic farming, especially in the dryland regions has been discussed. It has been argued that organic farming is productive and sustainable, but there is a need for strong support to it in the form of subsidies, agricultural extension services and research.Agricultural and Food Policy,

WATER POLICIES AND SMALLHOLDING IRRIGATION SCHEMES IN SOUTH AFRICA: A HISTORY AND NEW INSTITUTIONAL CHALLENGES

Resource /Energy Economics and Policy,

Towards an interoperable healthcare information infrastructure - working from the bottom up

Historically, the healthcare system has not made effective use of information technology. On the face of things, it would seem to provide a natural and richly varied domain in which to target benefit from IT solutions. But history shows that it is one of the most difficult domains in which to bring them to fruition. This paper provides an overview of the changing context and information requirements of healthcare that help to explain these characteristics.First and foremost, the disciplines and professions that healthcare encompasses have immense complexity and diversity to deal with, in structuring knowledge about what medicine and healthcare are, how they function, and what differentiates good practice and good performance. The need to maintain macro-economic stability of the health service, faced with this and many other uncertainties, means that management bottom lines predominate over choices and decisions that have to be made within everyday individual patient services. Individual practice and care, the bedrock of healthcare, is, for this and other reasons, more and more subject to professional and managerial control and regulation.One characteristic of organisations shown to be good at making effective use of IT is their capacity to devolve decisions within the organisation to where they can be best made, for the purpose of meeting their customers' needs. IT should, in this context, contribute as an enabler and not as an enforcer of good information services. The information infrastructure must work effectively, both top down and bottom up, to accommodate these countervailing pressures. This issue is explored in the context of infrastructure to support electronic health records.Because of the diverse and changing requirements of the huge healthcare sector, and the need to sustain health records over many decades, standardised systems must concentrate on doing the easier things well and as simply as possible, while accommodating immense diversity of requirements and practice. The manner in which the healthcare information infrastructure can be formulated and implemented to meet useful practical goals is explored, in the context of two case studies of research in CHIME at UCL and their user communities.Healthcare has severe problems both as a provider of information and as a purchaser of information systems. This has an impact on both its customer and its supplier relationships. Healthcare needs to become a better purchaser, more aware and realistic about what technology can and cannot do and where research is needed. Industry needs a greater awareness of the complexity of the healthcare domain, and the subtle ways in which information is part of the basic contract between healthcare professionals and patients, and the trust and understanding that must exist between them. It is an ideal domain for deeper collaboration between academic institutions and industry

Enhancing governance in fisheries management in southeast Asia towards 2020: issues and perspectives

This is a keynote address at the ASEAN-SEAFDEC conference on Sustainable Fisheries for Food Security Towards 2020, Fish for the People 2020: Adaptation to a Changing Environment. It addresses theme one of the conference which is Enhancing Governance in Fisheries Management. With the deteriorating state of the fishery resources and the emerging fisheries-related issues during the past decade, there is an urgent need to address concerns on weak governance as the main underlying cause of overfishing. Many social scientists believe that improved governance with strong elements of self-governance, co-management, and community-based management are required for effective management of fisheries resources.Fisheries Management, Governance, Co-management, Southeast Asia.

Knowing and doing vocational education and training reform: evidence, learning and the policy process

Much of VET policy internationally draws on a toolkit that has been seriously questioned for its logic, international relevance and effectiveness by considerable amounts of academic research. Reflecting primarily on our experiences of leading a complex, multi-country policy study, we develop an account that seeks to explore ways in which the apparent incommensurability between academic and policy knowledge can be addressed. This leads on to a broader discussion of key issues of contestation in the debates about knowledge for policy as they relate to international education and development more generally. We consider three key turns in the discourse of international education policy and research: to "governing by numbers", "what works" and policy learning, and ask what happens when these discursive trends travel to Southern and VET contexts. We suggest that this analysis implies that policymakers need both to be more modest and reflexive in their expectations of what knowledge can be mobilised for policy purposes and more serious in their commitment to supporting the generation of the types of knowledge that they claim to value. For international and comparative educators, we stress the importance of being clearer in seeking to shape research agendas; more rigorous in our approaches to research; and better in our external communication of our findings. Given the particular focus of this special issue on VET, we end by reiterating the particular challenge of reawakening research on VET-for-development from twenty years of slumbers

Report of the Global Strategy Task Force

The Global Strategy Task Force created a final report documenting its findings and recommendations. The intent of this report is to provide a framework through which the University can articulate and pursue an ambitious set of institutional goals that will increase its global connectivity and impact.To guide our work, the Task Force articulated a Global Vision for 2020:To establish Northwestern as one of the world's premier universities. To develop a culture and an infrastructure that link our intellectual communities to larger international idea and innovation networks and enable our faculty, students, and staff to lead and to learn from global advancements in research and teaching critical to human development and understanding.The Task Force identified three guiding principles for how we enact our vision.An ambitious intellectual agenda, not an economic one, must drive Northwestern's global investments. Northwestern should hire new faculty and staff, open new facilities, and initiate new dialogues and collaborations to the extent that it has a clear and compelling intellectual mission guiding each decision.Northwestern must focus on excellence to gain greater prominence in the world's leading innovation and idea networks, by identifying and investing deeply in select areas of strength and impact.Being global requires a bi-directional orientation. Northwestern must, with equal focus and vigor, expand its outward horizons while integrating global perspectives into the rich intellectual life of its US campuses and activities

Counting What Is Measured or Measuring What Counts? League Tables and Their Impact On Higher Education Institutions in England

This report investigates league tables and their impact on higher education institutions (HEIs) in England. It presents findings from two strands of research: – an analysis of five league tables selected for the study, their methodologies and the underlying data employed, and – an investigation of how higher education institutions respond to league tables generally and the extent to which they influence institutional decision-making and actions. The purpose of the research is to stimulate informed debate about the approaches and limitations of the various league tables, and greater understanding among the users and stakeholders of the implications of making decisions based on these sources of information