Fiber optic systems have many advantages on the basis of the communication systems technology compare to metallic media communication. These advantages include lower interference, small signal attenuation and bandwidth characteristics. In addition, relatively small cross-section of the fiber optic cable from a substantial growth in capacity in the existing lines is replaced. Properties of optical fibers can be classified as linear and nonlinear. Non-linear properties are influenced by parameters such as bit rate, channel spacing, and the level of performance. (more…)
There are literally thousands of uses for lasers. One of the largest applications is telecommunications—sending a signal throug ...
Several passive heating systems, if provided with proper ventilation, can ensure to provide cooling. Passive heating and cooling fo ...
Most discussions of energy use in paper production and papermaking are confusing because of a failure to define exactly what is mea ...
More than 48% of the raw material fiber used for paper production (chemical pulp or mechanical pulp) in the United States in 2002 w ...
Different lasers use different materials as the active medium. The medium can be either solid, liquid, or gas, and there are ad ...
The office copy machines (photocopier) is everywhere. Seven millions unit are in used in the United States and more than 1.5 million are sold each year. Anyone who has worked in an office has probably used at least once or perhaps spend hours making many copies. The copy machines are not cheap, not just the price. Office stencils related equipment is the fastest-growing use of electricity in commercial buildings in the U.S., according to the Department of Energy. The electricity consumed by office equipment companies will cost reaching two million dollar per year and copiers play an important role in this matter. (more…)
It is known that laser printers print faster, but swallow a large amount of energy, even if the printer is in the energy saving ...
After lighting, personal computers (PC) and monitors have the highest energy use in office environments. Studies have shown tha ...
Power generation and distribution networks are built with spare capacity to meet peak periods of energy consumption is usually ...
HVAC (heating, ventilation, and air-conditioning) systems vary depending on the complexity of room units size from single rooms ...
If a space is occupied on a predictable schedule, you can use either timeclocks or setback thermostats to turn the conditioning ...
It is known that laser printers print faster, but swallow a large amount of energy, even if the printer is in the energy saving mode. Most inkjet printers work on the other side, with print speeds slower but consumes much less energy. Therefore, desktop laser printers have faster print speeds more than 40 ppm, published for the majority of energy used, while a multifunction inkjet printer print quickly you can pay a few pages the same period. So, how to measure the effectiveness of energy saving is measured printers? This can be determined on the basis of the energy consumption per printed page. (more…)
The office copy machines (photocopier) is everywhere. Seven millions unit are in used in the United States and more than 1.5 mi ...
Different lasers use different materials as the active medium. The medium can be either solid, liquid, or gas, and there are ad ...
After lighting, personal computers (PC) and monitors have the highest energy use in office environments. Studies have shown tha ...
The word “laser” is an acronym for “light amplification by the stimulated emission of radiation.” Lasers of all kinds consist o ...
There are literally thousands of uses for lasers. One of the largest applications is telecommunications—sending a signal throug ...
Green computing has forced even the largest companies to rethink and refocus to use energy more efficiently. We have low-power processors, motherboards, memory modules, hard drives and technology energy efficiency even higher. But still, there are many devices that need to be look at if they are efficient enough. You still need to look at each individual product like LCD and CRD monitor displays to decide whether their effectiveness in reducing your monthly electricity bills.
Most of the nation’s approximately 61 million monitors are associated with desktop PCs and workstations, whereas some 13 million displays rely on video input (as seen in airports). (more…)
After lighting, personal computers (PC) and monitors have the highest energy use in office environments. Studies have shown tha ...
It is a reasonable and sensible action to tighten our belts and cut spending as living cost are climbing nowadays. We have to m ...
It is known that laser printers print faster, but swallow a large amount of energy, even if the printer is in the energy saving ...
Power generation and distribution networks are built with spare capacity to meet peak periods of energy consumption is usually ...
The office copy machines (photocopier) is everywhere. Seven millions unit are in used in the United States and more than 1.5 mi ...
After lighting, personal computers (PC) and monitors have the highest energy use in office environments. Studies have shown that the power management of computers and monitors can significantly reduce the energy consumption per capita, saving hundreds or thousands of dollars per year in electricity costs. The energy consumption of computers and monitors will be needed by the amount of energy to work and how they are used is determined.
The installed base of approximately 71 million personal computers and 2.5 million workstations in 2000 consumed 17.4 and 1.8 TWh, respectively. (more…)
Green computing has forced even the largest companies to rethink and refocus to use energy more efficiently. We have low-power ...
It is known that laser printers print faster, but swallow a large amount of energy, even if the printer is in the energy saving ...
Power generation and distribution networks are built with spare capacity to meet peak periods of energy consumption is usually ...
The office copy machines (photocopier) is everywhere. Seven millions unit are in used in the United States and more than 1.5 mi ...
The pace of innovations in batteries has not matched the remarkably fast evolution in the development of portable electronic techno ...
The evolution of oil prices is typically subject to a very high degree of uncertainty, given the extremely volatile nature of conditions that affect prices. Information on the future of oil prices is, however, extremely important for market operators as well as for central banks. Central banks, in particular, have a forward-looking perspective, attaching a very important role to inflation forecasts. This uncertainty tends to reinforce the importance of the relationship between oil prices and inflation, independently of estimates of the effects of a permanent change in oil prices on inflation and how to forecast oil prices. Two alternative technical assumptions on oil prices are worth mentioning: (more…)
The focus of this section is on the quantitative assessment of the impact of oil price fluctuations on inflation. For that purp ...
The volatility in oil prices since the early 1970s is a remarkable feature of energy economics. Annual fluctuations in the oil ...
In the post-World War II period, until the beginning of the 1970s, oil price fluctuations were very small. From 1949 to 1970, a ...
Most major oil and gas firms engage in both upstream (i.e., hydrocarbon exploration and production) and downstream (i.e., hydro ...
Energy is consumed by various segments of the economy, including households, commercial establishments, manufacturing enterpris ...
The volatility in oil prices since the early 1970s is a remarkable feature of energy economics. Annual fluctuations in the oil price level, as measured by the absolute value of year-to-year price changes, averaged only 1% in the 1949–1970 period; from 1970 to date, these fluctuations increased dramatically, reaching an order of magnitude of 30% per year. Even in the relatively stable period from 1986 to 1997, oil prices were more volatile than other primary commodities. (more…)
In the post-World War II period, until the beginning of the 1970s, oil price fluctuations were very small. From 1949 to 1970, a ...
The focus of this section is on the quantitative assessment of the impact of oil price fluctuations on inflation. For that purp ...
The evolution of oil prices is typically subject to a very high degree of uncertainty, given the extremely volatile nature of c ...
Most major oil and gas firms engage in both upstream (i.e., hydrocarbon exploration and production) and downstream (i.e., hydro ...
There are many possible reasons for suspecting market failure in a product like gasoline. Throughout the world, the exploration ...
The focus of this section is on the quantitative assessment of the impact of oil price fluctuations on inflation. For that purpose, the empirical evidence provided by an OECD study is briefly described. The study considered a permanent oil price increase of about $10, vis-a`-vis a baseline where oil prices were projected to remain at the $20–25 level (this shock corresponds to a price increase of about 40–50%). The OECD study presents estimates of the impact on GDP, world trade growth, and inflation, for the G7 countries. The estimates were obtained through the simulation of the OECD macro-econometric model Interlink, assuming fixed nominal exchange rates, real interest rates kept at baseline levels, and unchanged real government expenditures. The main results of this exercise, with respect to the impact on oil prices inflation, are reported in Table I. (more…)
The volatility in oil prices since the early 1970s is a remarkable feature of energy economics. Annual fluctuations in the oil ...
The evolution of oil prices is typically subject to a very high degree of uncertainty, given the extremely volatile nature of c ...
In the post-World War II period, until the beginning of the 1970s, oil price fluctuations were very small. From 1949 to 1970, a ...
Most major oil and gas firms engage in both upstream (i.e., hydrocarbon exploration and production) and downstream (i.e., hydro ...
There are many possible reasons for suspecting market failure in a product like gasoline. Throughout the world, the exploration ...
In the post-World War II period, until the beginning of the 1970s, oil price fluctuations were very small. From 1949 to 1970, average annual fluctuations of oil prices in U.S. dollars, as measured by the absolute value of year-to-year price changes, were of the order of 1%. Therefore, the real price (i.e., inflation adjusted) slightly declined throughout this period. This so-called Golden Age peak oil impacts period was characterized by a remarkable price stability and very strong gross domestic product (GDP) growth in the main industrialized economies. The stability of oil prices was an important element behind the low inflation and strong economic growth. (more…)
The volatility in oil prices since the early 1970s is a remarkable feature of energy economics. Annual fluctuations in the oil ...
The focus of this section is on the quantitative assessment of the impact of oil price fluctuations on inflation. For that purp ...
The evolution of oil prices is typically subject to a very high degree of uncertainty, given the extremely volatile nature of c ...
Most major oil and gas firms engage in both upstream (i.e., hydrocarbon exploration and production) and downstream (i.e., hydro ...
There are many possible reasons for suspecting market failure in a product like gasoline. Throughout the world, the exploration ...
Acid deposition and the associated particulate nitrates and sulfates are implicated in the deterioration of certain sensitive ecosystems, decreased visibility, negative human health effects, and increased degradation of certain stone building materials and cultural resources, especially those made of limestone and marble. Fine particulate nitrate and sulfate particles associated with acid deposition are implicated in aggravating cardiorespiratory diseases such as asthma and chronic bronchitis, especially in urban areas. In many cases estimating the impact of acid deposition on various ecosystems can be a difficult process because acid deposition is only one of many impacts that can effect a response. However, wet and dry acid deposition has been documented as a major factor in the following ecosystem responses. (more…)
The formation of acidic deposition is largely from the combustion of fossil fuels and the smelting of sulfide ores. Minor natur ...
The increased use of fossil energy since the industrial revolution, and especially since 1950, has been the major cause of incr ...
Although underground coal mines operations are not as visible as surface mining, their overall environmental impact can be greater ...
Historically, mining companies have extracted the earth’s resources wherever economics made it feasible, secure in their knowledge ...