Tourism

Tourism is the act of travel for the purpose of recreation and business, and the provision of services for this act. Tourists are people who are "travelling to and staying in places outside their usual environment for not more than one consecutive year for leisure, business and other purposes not related to the exercise of an activity remunerated from within the place visited . The distance between these two places is of no significance.

A more comprehensive definition would be that tourism is a service industry, comprising a number of tangible and intangible components. The tangible elements include transport systems — air, rail, road, water and now, space; hospitality services — accommodation, foods and beverages, tours, souvenirs; and related services such as banking, insurance and safety and security. The intangible elements include: rest and relaxation, culture, escape, adventure, new and different experiences.
Many countries depend heavily upon travel expenditures by foreigners as a source of taxation and as a source of income for the enterprises that sell export services to these travellers. Consequently the development of tourism is often a strategy employed either by a Non-governmental organization NGO or a governmental agency to promote a particular region for the purpose of increasing commerce through exporting goods and services to non-locals.

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Immunology

Immunology is a broad branch of biomedical science that covers the study of all aspects of the immune system in all organisms. It deals with, among other things, the physiological functioning of the immune system in states of both health and disease; malfunctions of the immune system in immunological disorders autoimmune diseases, hypersensitivities, immune deficiency, allograft rejection; the physical, chemical and physiological characteristics of the components of the immune system in vitro, in situ, and in vivo. Immunology has various applications in several disciplines of science, and as such is further divided.

Classical immunology ties in with the fields of epidemiology and medicine. It studies the relationship between the body systems, pathogens, and immunity. The earliest written mention of immunity can be traced back to the plague of Athens in 430 BCE. Thucydides noted that people who had recovered from a previous bout of the disease could nurse the sick without contracting the illness a second time. Many other ancient societies have references to this phenomenon, but it was not until the 19th and 20th centuries before the concept developed into scientific theory.

The study of the molecular and cellular components that comprise the immune system, including their function and interaction, is the central science of immunology. The immune system has been divided into a more primitive innate immune system, and acquired or adaptive immune system of vertebrates, the latter of which is further divided into humoral and cellular components.

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Music

Music is an art, entertainment, or other human activity that involves organized and audible sounds and silence. It is expressed in terms of pitch, rhythm, harmony, and timbre. Music involves complex generative forms in time through the construction of patterns and combinations of natural stimuli, principally sound. As a human activity, music may be used for artistic or aesthetic, communicative, entertainment, or ceremonial purposes. The definition of what constitutes music varies according to culture and social context.

The broadest definition of music is organized sound. There are observable patterns to what is broadly labeled music, and while there are understandable cultural variations, the properties of music are the properties of sound as perceived and processed by humans.A more conservative definition would be: Music is harmonious sound created by the playing of instruments as a whole or individually. It is a direct expression of human emotions designed to manipulate and transform the emotion of the listener/listeners. Music is designed to be felt unlike sound which is heard.



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Naturism

The meanings of naturism and nudism are very similar, and refer to a cultural and political movement practicing,advocating and defending social nudity in private and public spaces. Several other terms have been proposed as a replacement of these terms, but none has yet found the same wide-spread acceptance as the older terms naturism and nudism.The movement includes a large range of variants including naturism, nudism, Freikörperkultur (FKK), the free beach movement as well as generalized public lands/public nudity advocacy. While there is a large amount of shared history and common themes, issues and philosophy, differences between these separate movements are sometimes contentious.

The usage of these terms varies geographically; people in the US often prefer the term nudism, while people in Europe more often than not refer to themselves as naturists. The predominant movement centers on established, family-friendly, non-sexualized variations. The inclusion of the topfree equality movement within this movement is under debate. Use of the word "clothes free" has also been used when preceding other words as a descriptive term, some arguing that it allows more inclusion of both the naturist and nudist philosophy, which are arguably similar in many regards.The movement also works in parallel to and sometimes influences and is influenced by popular culture as well as individuals and activists as well as organizations .

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Microphone
A microphone, sometimes referred to as a mike or mic both IPA pronunciation is an acoustic to electric transducer that converts sound into an electrical signal. Microphones are used in many applications such as telephones, tape recorders, hearing aids, motion picture production, live and recorded audio engineering, in radio and television broadcasting and in computers for recording voice, VoIP and numerous other computer applications.

All microphones capture sound waves with a thin, flexible diaphragm or ribbon in the case of ribbon microphones. The vibrations of this element are then converted by various methods into an electrical signal that is an analog of the original sound. Most microphones in use today use electromagnetic generation dynamic microphones, capacitance change condenser microphones or piezoelectric generation to produce the signal from mechanical vibration.

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Coal

Coal is primarily used as a solid fuel to produce heat through combustion.
World coal consumption is about 5,800 million short tons annually, of which about 75% is used for electricity production. The region including China and India uses about 1,700 million short tons annually, forecast to exceed 3,000 million short tons in 2025. The USA consumes about 1,100 million short tons of coal each year, using 90% of it for generation of electricity. Coal is the fastest growing energy source in the world, with coal use increasing by 25% for the three-year period ending in December 2004.
When coal is used for electricity generation, it is usually pulverized and then burned in a furnace with a boiler. The furnace heat converts boiler water to steam, which is then used to spin turbines which turn generators and create electricity, with about 35–40% thermodynamic efficiency for the entire process. Approximately 40% of the world electricity production uses coal, and the total known deposits recoverable by current technologies are sufficient for 300 years' use at current rates.
A promising, more energy-efficient way of using coal for electricity production would be via solid-oxide fuel cells or molten-carbonate fuel cells, which would be able to get 60%–85% combined efficiency, compared to 35–40% normally obtained with steam-only turbines.Currently these fuel cell technologies can only process gaseous fuels, and they are also sensitive to sulfur poisoning, issues which would first have to be worked out before large scale commercial success is possible with coal. As far as gaseous fuels go, one idea is pulverized coal in a gas carrier, especially if the resulting carbon dioxide is sequestered, and has to be separated anyway from the carrier. A better idea is coal gasification with water,and then the water recycled.

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Coal

Coal is primarily used as a solid fuel to produce heat through combustion.
World coal consumption is about 5,800 million short tons annually, of which about 75% is used for electricity production. The region including China and India uses about 1,700 million short tons annually, forecast to exceed 3,000 million short tons in 2025. The USA consumes about 1,100 million short tons of coal each year, using 90% of it for generation of electricity. Coal is the fastest growing energy source in the world, with coal use increasing by 25% for the three-year period ending in December 2004.
When coal is used for electricity generation, it is usually pulverized and then burned in a furnace with a boiler. The furnace heat converts boiler water to steam, which is then used to spin turbines which turn generators and create electricity, with about 35–40% thermodynamic efficiency for the entire process. Approximately 40% of the world electricity production uses coal, and the total known deposits recoverable by current technologies are sufficient for 300 years' use at current rates.
A promising, more energy-efficient way of using coal for electricity production would be via solid-oxide fuel cells or molten-carbonate fuel cells, which would be able to get 60%–85% combined efficiency, compared to 35–40% normally obtained with steam-only turbines.Currently these fuel cell technologies can only process gaseous fuels, and they are also sensitive to sulfur poisoning, issues which would first have to be worked out before large scale commercial success is possible with coal. As far as gaseous fuels go, one idea is pulverized coal in a gas carrier, especially if the resulting carbon dioxide is sequestered, and has to be separated anyway from the carrier. A better idea is coal gasification with water,and then the water recycled.

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Gwerful Mechain

Gwerful Mechain, who lived in Mechain in Powys during the 1400s, is perhaps the most famous female Welsh-language poet. Little is known of her life. Her work, written in the traditional strict meters, is often a celebration of religion and sex, sometimes within the same poem. Probably the most famous part of her work today is her erotic poetry, especially Cywydd y Cedor ("Ode to the Pubic Hair"), a poem praising the vulva.

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ENCYCLOPEDIA, TODAY-YESTERDAY

CD-ROMs are use with personal computers to publish encyclopedias. The supplementaton of htese articles are done through video and audio files as well as numerous high-quality images. And it also published through online. A number of employed text writers, usually people with an academic degree wrote encyclopedias, but the interactive nature of the Internet allowed for the creation of collaborative projects such as Nupedia, Everything2, Open Site, and Wikipedia some of which allowed anyone to add or improve content.

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Channel Tunnel

Many stations — unsurprisingly — date from the 19th century and reflect the architecture of the time, granlway operations. Countries where railways arrived later may still have such architecture, as later stations often imitated 19th century styles. Various forms of architecture hed in the construction of train stations, from those boasting grand and intricate almosBaroque or Gothic-style edificeude those on newer high-speed rail networks, such as the Shinkansen in Japan, TGV lines in France, Berlin's new Hauptbahnhof station, or ICE lines in Germany. Britain boasts a new modern rail terminus at Waterloo International, the end-point for the Eurostar Channel Tunnel rail services to France and Belgium.
A terminus is a station sited where a railway line ends or terminates. Thus, platforms can be reached al destination of a traist reverse out of the station to continue the tripis not a terminus, but the train service involves reversing direction anywauses some worry to travellers whines — one might assume the train has finished its journey and is rto the starting location. Some travellers prefer facile to turn the seats when the train changes direction so that all travellers face fre level of the tracks. Stations are often sited where a road crosses the raway will be at different levels. The platforms will often be raised or lowered relative to the station entrance: the station buildings may be on either lboth. The other arrangement, where the station entrance and platforms are me level, is also common, but is perhaps rarer in urban areas, except when the station irminus. Elevated stations are more common, not including metro ss. Stations located at level crossings can be problematic if the train blocks the roadway while it stops, causing drivers to wait for an extended period of time.
An unusual configuration is where the station serves railway lines at differing levels. This may be due to the station's situation at a point whereservice, e.g. intercity and sassified on the layout of the platforms. Apart from for the two directions; but even there there is a basic choice of an island platform between the tracks, or two separate platforms outside the tracks. With more tracks, the possibilieailing further examples of less usual railway station layouts and stations wipri of motor transport on Earth. Whilst in the Western World private cars dominate, in poor countries (which represent the mty of human population) most people cannot g viable for larger distances. This usually takes the form of mini-buses (jitneys) that may follow fixed routes but are usually flele, including the option of taxi-style door-to-door transportation.

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