Xem 1-20 trên 43 kết quả Including wind
  • As one of the world’s largest financial institutions, Bank of America understands the powerful role it can play in addressing the private- sector financing and economies of scale needed to build a low- carbon economy. That’s why we have made commitments to align our financial products and services to the burgeoning market for low-carbon energy, including wind, solar, biomass, nuclear and other emerging technologies. Our goal is to serve all customer audiences — from large corporate clients and institutional investors to individual consumers and small businesses.

    pdf0p yeurauxanh88 28-09-2012 29 4   Download

  • With shortages of fossil energy and heavy biomass energy use occurring in both developed and developing countries, a major focus has developed worldwide on renewable energy systems. Currently, a heavy focus is on biofuels made from crops, crop residues and wood. Though it may seem beneficial to use renewable plant materials for biofuel, their use raises many concerns about major environmental problems, including food shortages and serious destruction of vital soil resources.

    pdf513p chipmoon 19-07-2012 137 54   Download

  • This book covers the recent development and progress of the wind energy conversion system. The chapters are contributed by prominent researchers in the field of wind energy and cover grid integration issues, modern control theories applied in wind energy conversion system, and dynamic and transient stability studies.

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  • The content of this book covers several up-to-date topics in fluid dynamics, computational modeling and its applications, and it is intended to serve as a general reference for scientists, engineers, and graduate students. The book is comprised of 30 chapters divided into 5 parts, which include: winds, building and risk prevention; multiphase flow, structures and gases; heat transfer, combustion and energy; medical and biomechanical applications; and other important themes.

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  • VNU Journal of Science, Mathematics - Physics 25 (2009) 21-38 Proper Orthogonal Decomposition and its Proper Transformations has been applied widely in many engineering topics including the wind engineering recently due to its advantage of optimum approximation of multi-variate random fields using the modal decomposition and limited number of dominantly orthogonal eigenvectors.

    pdf18p tuanlocmuido 19-12-2012 26 1   Download

  • Perhaps one day the Beltsville Agricultural Research Center will stumble upon the dust’s value for growing bigger and healthier soil organism populations, crops, forests—even a fading human race. Someone, perhaps the U.S. Congress, should probably inform them immediately, however. John Hamaker and this writer have tried at length to communicate with many USDA people, including the Secretary and Assistant Secretary of Agriculture, the Chief of the Forest Service.

    pdf56p contentnew 02-05-2012 218 129   Download

  • Forensic Engineering Investigation is a compendium of the investigative methodologies used by engineers and scientific investigators to evaluate some of the more common types of failures and catastrophic events. In essence, the book provides analyses and methods for determining how an entity was damaged and when that damage may have legal consequences. The material covers 21 common types of failures, catastrophic events, and losses that forensic engineers routinely assess.

    pdf50p ken333 28-06-2012 54 18   Download

  • Wind power generation is considered as the most economic viable alternative within the portfolio of renewable energy resources. Among their advantages are the large number of potential sites for erection and the rapidly evolving technology with many suppliers offering from the individual turbine set to even turnkey projects. The disadvantages of wind energy include high capital costs and lack of controllability on the discontinuous or intermittent resource.

    pdf246p 123859674 04-07-2012 103 15   Download

  • Humanity is facing several critical global challenges at the beginning of the 21st century. One of which includes the quest for alternative energy resources that mitigate the dependence on fossil fuels. Whereas fossil fuels are available in situ at all times, the utilisation of renewal energies has to cope with large temporal fl uctuations ranging from seconds to seasons.

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  • English Heritage is the Government’s adviser on the historic environment.Central to our role is the advice we give to local planning authorities and governmentdepartments on development proposals affecting historic buildings,sites and areas,archaeology on land and underwater,designed landscapes and the historic aspects of the landscape as a whole.We also manage an estate of over 400 historic propertiesopen to the public.This guidance is intended for developers of wind energy projectswhich may affect any of these aspects of the historic environment.

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  • The increasing three-dimensionality of Schnabel’s work was shown to the public in an exhibition at the Mary Boone Gallery in 1982 which included paintings with even more clearly defined sculptural elements, for example Rest, 1982. Two other works included in that exhibition, however, represent the first steps into the realm of bronze sculpture: The Mud in Mudanza, 1982, which has a cast bronze cross and cast antlers in its centre, and The Raft, 1982, featuring a bronze tree struck boldly through its surface.

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  • Forests cover about 30 percent of total land area, but they store about 50 percent of the Earth’s terrestrial carbon (1,150 GtC) in plant biomass, litter and debris, or in the soil. About 20 percent of total GHG emissions are caused by deforestation and land use changes but in tropical regions emissions attributable to land clearance are much higher, up to 40 percent of national totals. Reducing deforestation and degradation (REDD) is the forest mitigation option with the largest potential for maintaining carbon stocks in standing forests over the short term.

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  • This study examined the clinical findings of visual display terminal (VDT) users who presented with monocular symptoms. The sample consisted of 35 people performing sustained work at VDTs. Each subject un- derwent an evaluation that included: visual acuities, determination of refractive status, ocular motor testing, the stability of fixa- tion, degree of suppressions of simulta- neous binocular perception, and ocular health status. These findings were com- pared to a control group of 100 subjects who did not habitually use a VDT.

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  • In  cases  where  a  country  received  an  insufficient  survey  response,  the  projection  base  included  respondents from the country’s continent.  A weighting system was employed to emphasize responses  from the particular country.      Caution  is  urged  when  comparing  against  prior  years,  because  studies  such  as  this  can  experience  substantial  variances  within  specific  procedures.

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  • Pipe stress analysis calculates the stress in a piping system subject to normal operating loads such as pressure, weight, and thermal expansion, and occasional loads such as wind, earthquake, and water hammer. Because all piping systems are connected to equipment such as vessels, tanks, pumps, turbines, and compressors, the piping stress analysis also involves evaluation of the effect of the piping forces and moments to the connecting equipment. As the piping stress is controlled by the arrangement of the supports and restraints, the scope of piping stress includes also pipe supports.

    pdf496p aries23 29-09-2012 126 65   Download

  • Plants are continuously affected by a variety of environmental factors. Whereas biotic environmental factors are other organisms such as symbionts, parasites, pathogens, herbivores, and competitors, abiotic factors include parameters and resources which determine plant growth like temperature, relative humidity, light, availability of water, mineral nutrients, and CO 2 , as well as wind, ionizing radiation, or pollutants (Schulze et al. 2002 ) . The effect each abiotic factor has on the plant depends on its quantity or intensity.

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  • This book includes solar energy, wind energy, hybrid systems, biofuels, energy management and efficiency, optimization of renewable energy systems and much more. Subsequently, the book presents the physical and technical principles of promising ways of utilizing renewable energies. The authors provide the important data and parameter sets for the major possibilities of renewable energies utilization which allow an economic and environmental assessment.

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  • The next chapter describes how a conventional model of ocean-atmosphere interaction can be modified to include the free convection within the air and the swell of the ocean. These effects become particularly important for low wind velocities, where the standard Charnock wind stress formula leads to a singularity. The article should be of particular interest to readers who are familiar with standard turbulence modeling, and it is important to weather modeling.

    pdf168p contentnew 12-04-2012 129 17   Download

  • Over 98 per cent of sprayed insecticides and 95 per cent of herbicides reach a destination other than their target species, including non-target species, air, water and soil. Pesticide drift occurs when pesticides suspended in the air as particles are carried by wind to other areas, potentially contaminating them. Pesticides are one of the causes of water pollution and some pesticides are persistent organic pollutants and contribute to soil contamination. Detection of pesticide molecules in the food items from plant and animal origin become imperative for safe consumption of food.

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  • Induction machines have become the staple for electromechanical energy conversion in today’s industry; they are used more often than all other types of motors combined. Several factors have made them the machine of choice for industrial applications vs. DC machines, including their ruggedness, reliability, and low maintenance [1, 2]. The cage-induction machine is simple to manufacture, with no rotor windings or commutator for external rotor connection. There are no brushes to replace because of wear, and no brush arcing...

    pdf19p daohuongthon 22-01-2010 58 15   Download

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