47,984 research outputs found

    Study On Impact Of Dust Particles Towards Planetary Ball Milling Machine's Maintenance, Reliability And Performance Using DOE.

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    Di industri pengeluaran, keupayaan untuk memenuhi kehendak pelanggan dari segi masa penghantaran dan qualiti produk merupakan objektif utama bagi setiap pengeluar. Salah satu kriteria untuk mencapai objektif ini ialah dengan memastikan mesin-mesin untuk proses pengeluaran beroperasi dengan lancar tanpa atau kurang berlakunya kerosakan secara tiba-tiba . Preventive Maintenance (PM) is one of the strategies that can be applied to reduce the machine breakdown problem due to unplanned maintenance. However, the application of PM in term of when is the best time to carry out the PM is an important issue. The answer to this question should be based on an adequate maintenance analysis

    ‘No Net Loss’ - Instrument Choice in Wetlands Protection

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    While not a high priority issue for most people, the public has long recognized the general importance of wetlands. Since President George H.W. Bush\u27s campaign in 1988, successive administration have pledged to ensure there would be no net loss of wetlands. Despite these continuous presidential pledges to protect wetlands, in recent decades, as more and more people have moved to coastal and waterside properties, the economic benefits from developing wetlands (and political pressures on obstacles to development) have significantly increased. Seeking to mediate the conflict between no net loss of wetlands and development pressures, the U.S. Environmental Protection Agency (EPA) and Army Corps of Engineers (Corps) have employed a range of policy instruments to slow and reverse wetlands conversion. Through the 1970s and 1980s, the EPA and the Corps relied on prescriptive regulation that discouraged development of wetlands and, even if a permit for wetland filling were granted, required on-site mitigation of destroyed wetlands to ensure no net loss. To defuse the growing political pressure for substantial change to this 404 Permit process for developing wetlands, however, since the 1990s the agencies and state governments have promoted a market mechanism that seeks to ensure wetlands conservation at minimum economic and political cost. This instrument is known as wetlands mitigation banking (WMB). In WMB, a bank of wetlands habitat is created, restored, or preserved and then made available to developers of wetlands habitat who must buy habitat mitigation as a condition of government approval for development. This mechanism has also provided a model for endangered species protection and is in the process of being extended to other settings including watershed protection. Given the shift in emphasis from prescriptive regulation to trading, the government\u27s longstanding pursuit of no net loss of wetlands provides a particularly useful case study for comparing the use of regulatory and market instruments for environmental protection. Indeed, WMB provides a rare example of robust trading outside the air pollution context and the trading habitat-based goods raises very different concerns than seen in trading mobile pollutants. Examining the evolution of WMB also forces us to think carefully over how to assess the success of a trading program. The traditional measure would likely be efficiency. But one must also consider effectiveness. In this regards, WMB poses two different types of failures - failure of instrument design (a front-end problem) and failure of implementation through monitoring and enforcement (a back-end problem). As many of the case studies in this book illustrate, performance of WMB depends critically both on institutional design and implementation. Another important measure of success concerns distributional equity. Who wins and who loses from banking? Such concerns are far more difficult to assess as good or bad policy in habitat trading than the traditional hot spots of pollutant trading programs. The chapter ends by drawing out key lessons for market-based approaches to watershed protection

    Lessons from the submission and approval process of energy-efficiency CDM baseline and monitoring methodologies

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    Energy efficiency is a CDM project type that suffers from high methodology rejection rates. 43 baseline and monitoring methodologies for CDM energy efficiency projects are analyzed with respect to reasons for approval / rejection by the CDM Executive Board. Most methodologies have been rejected because they did not comply with implicit quality standards regarding presentation and conservativeness. Also, tools to select the baseline scenario and to prove additionality were frequently lacking. If the level or the quality of production in the baseline or the project scenario changes, a simple before-after-comparison is not valid. Black box models are not accepted and methodologies should be sufficiently differentiated to account for specific (technical) circumstances. The remaining lifetime of equipment has to be taken into account. Often, elements of small-scale methodologies have been retained in approvals of large-scale methodologies. --

    The role of occupational pension funds in Mauritius

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    Mauritius belongs to a select group of developing countries where contractual savings-savings with insurance companies and pension funds-exceed 40 percent of GDP and represent a major potential force in the local financial system. Pension funds account for 75 percent of contractual savings. Contractual savings institutions invest in government securities, housing loans, corporate securities, real estate and bank deposits. They currently hold 35 percent of government securities and also account for 36 percent of total outstanding housing loans.Given their strong demand for long-duration assets, they can stimulate the issue of long-term government bonds (both inflation-linked and zero-coupon) and the development of corporate debentures, mortgage bonds, and mortgage-backed securities.Mauritius has a balanced and well-managed multipillar pension system. In addition to several public components, such as the Basic Retirement Pension, the National Pensions Fund (NPF), the National Savings Fund, and the Civil Service Pension Scheme, there are over 1,000 funded occupational pension schemes that play an increasingly important part in the whole system. The funded schemes are divided into two main groups-those insured and/or administered by insurance companies, and those that are self-administered and are registered with the Registrar of Associations. Coverage of the funded schemes is estimated at about 10 percent of the labor force. Together with the unfunded civil service scheme, occupational pension schemes cover about 100,000 employees or 20 percent of the labor force. All types of pension funds, including the public ones, report low operating costs. This reflects the absence of marketing and selling costs and, in the case of large private pension funds, the assumption of some costs by sponsoring employers. The investment performance of the self-administered funds was less than fully satisfactory in the late 1990s, reflecting poor returns on the local and foreign equity markets. Funds insured or administered by insurance companies as well the NPF performed better during this period because of their heavier allocations in government securities and housing loans. However, over a longer period, the private pension funds probably outperformed the NPF. The regulatory framework, though fragmented, is not unreasonable. It has many important provisions, such as observance of internationally acceptable accounting and actuarial standards and minimum vesting and portability rules, and it does not impose prescribed limits on investments. However, consolidation and modernization of the regulatory framework is required, while supervision, which is currently nonexistent, needs to be developed and to be proactive.Insurance Law,Non Bank Financial Institutions,Pensions&Retirement Systems,Payment Systems&Infrastructure,Banks&Banking Reform,Non Bank Financial Institutions,Pensions&Retirement Systems,Insurance Law,Banks&Banking Reform,Contractual Savings

    Warranty Data Analysis: A Review

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    Warranty claims and supplementary data contain useful information about product quality and reliability. Analysing such data can therefore be of benefit to manufacturers in identifying early warnings of abnormalities in their products, providing useful information about failure modes to aid design modification, estimating product reliability for deciding on warranty policy and forecasting future warranty claims needed for preparing fiscal plans. In the last two decades, considerable research has been conducted in warranty data analysis (WDA) from several different perspectives. This article attempts to summarise and review the research and developments in WDA with emphasis on models, methods and applications. It concludes with a brief discussion on current practices and possible future trends in WDA

    Reliability analysis of a repairable dependent parallel system

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    Wind turbine condition monitoring : technical and commercial challenges.

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    Deployment of larger scale wind turbine systems, particularly offshore, requires more organized operation and maintenance strategies to ensure systems are safe, profitable and cost-effective. Among existing maintenance strategies, reliability centred maintenance is regarded as best for offshore wind turbines, delivering corrective and proactive (i.e. preventive and predictive) maintenance techniques enabling wind turbines to achieve high availability and low cost of energy. Reliability centred maintenance analysis may demonstrate that an accurate and reliable condition monitoring system is one method to increase availability and decrease the cost of energy from wind. In recent years, efforts have been made to develop efficient and cost-effective condition monitoring techniques for wind turbines. A number of commercial wind turbine monitoring systems are available in the market, most based on existing techniques from other rotating machine industries. Other wind turbine condition monitoring reviews have been published but have not addressed the technical and commercial challenges, in particular, reliability and value for money. The purpose of this paper is to fill this gap and present the wind industry with a detailed analysis of the current practical challenges with existing wind turbine condition monitoring technology
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