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, Freik├Ârperkultur (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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