Bathing is the act of washing the body, usually with water, or the immersion of the body in water. It may be practiced for personal hygiene, religious ritual or therapeutic purposes. By analogy, especially as a recreational activity, the term is also applied to sun bathing and sea bathing.
People bathe at a range of temperatures, according to custom or purpose, from very cold to very hot. In the western world, bathing is usually done at comfortable temperatures in a bathtub or shower. This type of bathing is done more or less daily for hygiene purposes. A ritual religious bath is sometimes referred to as immersion or baptism. The use of water for therapeutic purposes can be called a water treatment or hydrotherapy. Recreational water activities are also known as swimming and paddling.
Throughout history, societies devised systems to enable water to be brought to population centers.
Bathing in Ancient China can be traced back to Shang Dynasty 3000 years ago (1600-1046 BCE). Archaeological findings from the Yinxu ruins show a cauldron to boil water, smaller cauldrons to draw out the water to be poured into a basin, skin scrapers to remove dirt and dead skin. 2300 year old lavish imperial bathrooms with exquisite tiles and a sewage system can be seen in Xi'an. Bathing grew in importance in the Han Dynasty (202 BC-AD 220) where officials were allowed to take a day's leave for bathing at home every five days, and bathing became the reason for a bank holiday for the first time.
The oldest accountable daily ritual of bathing can be traced to the ancient Indians. They used elaborate practices for personal hygiene with three daily baths and washing. These are recorded in the works called grihya sutras which date back to 500 BCE and are in practice today in some communities.
Ancient Greece utilized small bathtubs, wash basins, and foot baths for personal cleanliness. The earliest findings of baths date from the mid-2nd millennium BC in the palace complex at Knossos, Crete, and the luxurious alabaster bathtubs excavated in Akrotiri, Santorini.
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Public baths originated when most people in population centers did not have access to private bathing facilities. Though termed "public", they have often been restricted according to gender, religious affiliation, personal membership, and other criteria. In addition to their hygienic function, public baths have also been social meeting places. They have included saunas, massages, and other relaxation therapies, as are found in contemporary day spas.
A spa is a location where mineral-rich spring water (and sometimes seawater) is used to give medicinal baths. Spa towns or spa resorts (including hot springs resorts) typically offer various health treatments, which are also known as balneotherapy. The belief in the curative powers of mineral waters goes back to prehistoric times. Such practices have been popular worldwide, but are especially widespread in Europe and Japan. Day spas and medspas are also quite popular, and offer various personal care treatments.
A destination spa or health resort is a resort centered on a spa, such as a mineral spa. Historically, many such spas were developed at the location of natural hot springs or mineral springs. In the era before modern biochemistry and pharmacotherapy, "taking the waters" was often believed to have great medicinal powers. Even without such mystic powers, the stress relief and health education of spas also often has some degree of positive effect on health.
Traditional simulated annealing uses thermal fluctuations for convergence in optimization problems. Quantum tunneling provides a different mechanism for moving between states, with the potential for reduced time scales and different outcomes. Thermal and q ...
We analyze an open many-body system that is strongly coupled at its boundaries to interacting quantum baths. We show that the two-body interactions inside the baths induce emergent phenomena in the spin transport. The system and baths are modeled as indepe ...
In recent years, recreational waterbodies are increasingly favoured in urban areas. In spite of the growing concerns for maintaining the required bathing water quality, the impacts of stormwater drainage are still poorly controlled. In this context, this s ...