Xem 1-20 trên 28 kết quả Energy fluxes
  • The book contains fundamentals of solar radiation, its ecological impacts, applications, especially in agriculture, architecture, thermal and electric energy. Chapters are written by numerous experienced scientists in the field from various parts of the world. Apart from chapter one which is the introductory chapter of the book, that gives a general topic insight of the book, there are 24 more chapters that cover various fields of solar radiation.

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  • Rising prices at the pump affect everybody – workers and farmers; truck drivers and restaurant owners. Businesses see it impact their bottom line. Families feel the pinch when they fill up their tank. For Americans already struggling to get by, it makes life that much harder. Demand for oil in countries like China and India is only growing, and the price of oil will continue to rise with it. That’s why we need to make ourselves more secure and control our energy future by harnessing all of the resources that we have available and embracing...

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  • Lecture Electromechanical energy conversion - Magnetic circuits and magnetic materials presents the following content: Introduction to magnetic circuits; flux linkage, inductance, and energy; properties of magnetic materials; AC excitation; permanent magnets; application of permanent magnet materials.

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  • This chapter include contents: Introduction to Polyphase Induction Machines, currents and fluxes in Polyphase Induction Machines, induction – motor equivalent circuit, analysis of the equivalent circuit, torque and power by use of Thevenin’s theorem, parameter determination from no – load and blocked – rotor tests, effects of rotor resistance.

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  • The genesis of this book began on the sunny shores of southern France in September 1993. For five days in the delightful Mediterranean coastal town of La Londe Les Maures, a gathering occurred of a group of scientists interested in furthering both the understanding and use of thermal infrared (TIR) remote sensing data for analysis of land surface processes.

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  • I. Introduction An important aspect of nuclear reactor core analysis involves the determination of the optimal coolant flow distribution and pressure drop across the reactor core. On the one hand, higher coolant flow rates will lead to better heat transfer coefficients and higher Critical Heat Flux (CHF) limits. On the other hand, higher flows rates will also in large pressure drops across the reactor core, hence larger required pumping powers and larger dynamic loads on the core components.

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  • Nucleate pool boiling is a daily phenomenon transferring effectively high heat flux. It is, however, a very complex and illusive process because of the interrelation of numerous factors and effects as the nucleate process, the growth of the bubbles, the interaction between the heater’s surface with liquid and vapor, the evaporation process at the liquidvapor interface, and the transport process of vapour and hot liquid away from the heater’s surface.

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  • Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Wettability Modification of Nanomaterials by Low-Energy Electron Flux

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  • Tax credits, if combined with outreach and education efforts and other complementary incentives (such as net metering), can also help drive the market for renewables. Clearly, states cannot expect any one of these incentives by itself to remove all the barriers to renewable energy technology development. This study provides some potent examples of program design and implementation elements that have enhanced and limited program effectiveness.

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  • They find that the elasticity of CO2 emissions and energy are close to unity (i.e., a 1% increase in population leads to an approximately 1% increase in CO2 emissions). They do not estimate how these elasticities may vary with population levels. All of these results are based on cross-sectional data for 1 year only. Finally, Shi (2003), again in the context of the IPAT model, uses a panel of cross-sectional and time series data. Shi finds population elas- ticities for CO2 of between 1.41 and 1.

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  • The Per-Arnt-Sim (PAS) domain serine⁄threonine kinase PASKIN, or PAS kinase, links energy flux and protein synthesis in yeast, regulates glycogen synthesis and protein translation in mammals, and might be involved in insulin regulation in the pancreas.

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  • The first half of the Review considers how the evidence on the economic impacts of climate change, and on the costs and benefits of action to reduce greenhouse gas emissions, relates to the conceptual framework described above. The scientific evidence points to increasing risks of serious, irreversible impacts from climate change associated with business-as-usual (BAU) paths for emissions. The scientific evidence on the causes and future paths of climate change is strengthening all the time.

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  • Similarly, the reverse movement represents a decrease in demand. The beauty of the connection between demand and marginal value is that an increase in demand could in principle have meant either more units demanded at a given price, or a higher willingness to pay for each unit, but those are in fact the same concept – both create a movement up and to the right. For many goods, an increase in income increases the demand for the good. Porsche automobiles, yachts, and Beverly Hills homes are mostly purchased by people with high incomes. Few billionaires...

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  • This report presents evidence of the growing use of laptop computers. Because of their inherent portability, accounting for laptops is difficult, especially during an after-hours survey, but our conservative estimate is that laptops comprise at least 10% of the non-server computers in our sample. We also estimate that laptops outnumbered desktop computers at two sites: one medium and one large office. To the extent that relatively energy-efficient laptops are replacing desktop computers, significant electrical energy is saved. However, more work is...

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  • Moreover, strategies that account for predictable active management skills tilt more heavily toward mutual funds that overweight technology and energy stocks during recessions, and financial and metals stocks during expansions, indicating that business cycle variables are key to timing these industries. Remarkably, predictable skill strategies also choose individual mutual funds within the outperforming industries that, in turn, substantially outperform their industry benchmarks, even though these industry benchmarks do not account for any trading costs or fees.

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  • The in vitro Entamoeba histolytica pyruvate:ferredoxin oxidoreductase (EhPFOR) kinetic properties and the effect of oxidative stress on glycolytic pathway enzymes and fluxes in live trophozoites were evaluated.EhPFOR showed a strong preference for pyruvate as substrate over other oxoacids.

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  • Whereas the mechanical performance of plant organs has often been discussed in evolutionary biology [1,2], tree biomechanics has rarely been considered in the context of functional ecology. Functional ecology aims at understanding the functions of organisms that result in fluxes of biomass or energy within an ecosystem, e.g., a forest. This discipline studies the processes controlling these fluxes, at either the scale of an individual, community, or ecosystem, with their response to natural or anthropic environmental variations....

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  • CHAPTER 4 9 SOLAR ENERGY APPLICATIONS Jan E Kreider Jan F. Kreider and Associates, Inc. and Joint Center for Energy Management University of Colorado Boulder, Colorado 49.1 SOLAR ENERGY AVAILABILITY 1 4 5 9 49.1.1 Solar Geometry 1 4 5 9 49.1.2 Sunrise and Sunset 1552 49. 1 .3 Quantitative Solar Flux Availability 1 5 5 4 SOLAR THERMAL COLLECTORS 1 6 5 0 49.2. 1 Flat-Plate Collectors 1 560 49.2.2 Concentrating Collectors 1564 49.2.3 Collector Testing 1 6 5 8 SOLAR THERMAL APPLICATIONS 1 6 5 9 49.3.1 Solar Water Heating 1 6 5 9 49.4 49.2 49.3.2 Mechanical Solar Space Heating Systems...

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  • Simkon Poisson (1781-1840) developed the probability distribution that describes photodetector noise. A photodetector is a device that measures photon flux or optical power by converting the energy of the absorbed photons into a measurable form.

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  • Chapter 17 The Flux of Energy through Ecosystems 17.1 Introduction All biological entities require matter for their construction and energy for their activities. This is true not only for individual organisms, but also for the populations and communities that they form in nature.

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