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Hygiene is the maintenance of healthy practices. In modern terminology, this is usually regarded as a particular reference to cleanliness.Outward signs of good hygiene include the absence of visible dirt or of bad smells. Since the development of the germ theory of disease, hygiene has come to mean any practice leading to the absence of harmful levels of bacteria.Good hygiene is an aid to health, beauty, comfort and social interactions. Good hygiene directly aids in disease prevention and/or diseasevarious sources: soil dust lifted up by wind, volcanic eruptions, and pollution are some examples; airborne dust is considered an aerosol and can have a strong, local radiative forcing on the atmosphere and significant effects on climate. Dust is also widely present in outer spacee interstellar dust and Zodiacal light where gas and dust clouds are primary precursors for planetary systems.The physical behavior of dust follows laws that are not always comparable with that of solid or fluid matter. For example, the pressure on a box full of dust need not be uniform See physics of granulate matter for explanation.
House dustA sample solation. That is, if you are good hygiene will help you avoid illness. If you are sick, good hygiene can reduce your contagiousness to othersWashing is the most common example of hygienic behavior. Washing is often done with soap or detergent which helps to remove oils and to break up dirt particles so they may be washed away.Hygienic practices such as frequent hand washing or the use of boiled water in medical operations -- have a profound impact on reducing the spread of disease. This is because they kill or remove disease-causing microbes in the immediate surroundings. For instance, washing one's hands after using the toilet and before handling food reduces the chance of spreading E. coli bacteria and hepatitis A, both of which are spread from fecal contamination of food.

Dust is a general name for minute solid particles of diameters less than 500 micrometers otherwise see sand or granulate) and, more generally, for finely divided matter. On Earth, dust occurs in the from various sources: soil dust lifted up by wind, volcanic eruptions, and pollution are some examples; airborne dust is considered an aerosol and can have a strong, local radiative forcing on the atmosphere and significant effects on climate. Dust is also widely present in outer spac(see interstellar dust and Zodiacal light where gas and dust clouds are primary precursors for planetary systems.The physical behavior of dust follows laws that are not always comparable with that of solid or fluid matter. For example, the pressure on a box full of dust need not be uniform (See physics of granulate matter for explanation.

House dustA sample of house dustThe dust which collects in houses is composed of atmospheric dust combined with dust generated by the inhabitants, mostly from sloughed skin cells and fibers from clothing and coverings. It can be removed with a broom, dusting cloth, or vacuum cleaner.House dust mites, often found in fibers like carpets and beds, feed on the organic components of house dust. Their feces, in turn, become part of house dust and can provoke allergic reactions in humans.

Understanding the nature and meaning of beauty is one of the key themes in the philosophical discipline known as aesthetics.The composer and critic Robert Schumann distinguished between two kinds of beauty, natural beauty and poetic beauty: the former being found in the contemplation of nature, the latter in man's conscious, creative intervention into nature. Schumann indicated that in music, or other art, both kinds of beauty appear, but the former is only sensual delthe latter begins where the former leaves off.A common theory says that beauty is the appearance of things and people that are good. This has many supporting examples. Most people judge physically attractive humto be good, both physically and on deeper levels. The phrase "beauty is in the eye of the beholder" suggests that what one person finds beautiful won't always be what another sees.Beauty as goodness" still has whole classes of significant counterexamples with no agreed solution. These include such things as a glacier, or a ruggedly dry desert mountain range. Most people find beauty in nature, despite it sometimes being "red in tooth and claw" . Another type of counterexample are comic or sarcastic works of art, which can be good, but are rarely beautiful.

It is well known that people's skills develop and change their sense of beauty. Carpenters may view an out-of-true building as ugly, and many master carpenters can see out-of-true angles as small as half a degree. Many musicians can likewise hear as dissonant a tone that's high or low by as little as two percent of the distance to the next note. Most people have similar aesthetics about the work or hobbies they've mastere
Beauty and human appearance de Milo, front and back. Studies done have found that facial symmetry may be important because it is evidence that the person grew up in a healthy way, without visible most common example of hygienic behavior. Washing is often done with soap or detergent which helps to remove oils and to break up dirt particles so they may be washed away.Hygienic practices such as frequent hand washing or the use of boiled water in medical operations -- have a profound impact on reducing the spread of disease. This is because they kill or remove disease-causing microbes in the immediate surroundings. For instance, washing one's hands after using the toilet and before handling food reduces the chance of spreading E. coli bacteria and hepatitis A, both of which are spread from fecal contamination of food.

Dust is a general name for minute solid particles of diameters less than 500 micrometers otherwise see sand or granulate and, more generally, for finely divided matter. On Earth, dust occurs in the from various sources: soil dust lifted up by wind, volcanic eruptions, and pollution are some examples; airborne dust is considered an aerosol and can have a strong, local radiative forcing on the atmosphere and significant effects on climate. Dust is also widely present in outer spacee interstellar dust and Zodiacal light where gas and dust clouds are primary precursors for planetary systems.The physical behavior of dust follows laws that are not always comparable with that of solid or fluid matter. For example, the pressure on a box full of dust need not be uniform See physics of granulate matter for explanation.

House dustA sample of house dustThe dust which collects in houses is composed of atmospheric dust combined with dust generated by the inhabitants, mostly from sloughegenetic defects. Other studies have also shown that the length and height of the cheekbones may contribute strongly to beauty. These studies were conducted by scientists who asked volunteers to rate a series of photographs on the basis of beauty. The attributes common to all images rated beautiful were then picked out.One traditional, subtle feature that is considered an indication of beautiful women of most cultures is a waist-to-hip ratio of about 70%(waist circumference that is 70% of the hips circumference. The waist-to-hip ratio theory was discovered by psychologist Dr. Devendra Singh of the University of Texas at Austin. Physiologists have shown that this ratio accurately indicates most women's fertility.

The earliest theory of beauty can be found in the works of early Greek philosophers from the pre-Socratic period, such as Pythagoras. The extant writings atributed to Pythagoras reveal that the Pythagorean school, if not Pythagoras himself, saw a strong connection between mathematics and beauty. In particular, they noted that ojects proportioned according to the golden rateemed more attrctive. Some modern research seems to confirm this, in that people whose facial features are symmetric and proportioned according the golden ratio are consistently ranked as more attractive than those whose faces are not.ccording to an ancient Indian dition, the beautiful is that which from moment to moment is always new. That is to say, it removes the mind from the world in which things grow old.Even mathematical formulae can be considered beautiful. eip + 1 = 0 is commonly considered one of the most beautiful theorems in mathematics .various sources: soil dust lifted up by wind, volcanic eruptions, and pollution are some examples; airborne dust is considered an aerosol and can have a strong, local radiative forcing on the atmosphere and significant effects on climate. Dust is also widely present in outer spacee interstellar dust and Zodiacal light where gas and dust clouds are primary precursors for planetary systems.The physical behavior of dust follows laws that are not always comparable with that of solid or fluid matter. For example, the pressure on a box full of dust need not be uniform See physics of granulate matter for explanation.House dustA sample The poet Edna St. Vincent Millay wrote that "Euclid alone has looked on beauty bare" in an allusion to the austere beauty many people have found in the reasoning in the geometer Euclid's Elements.Another connection between mathematics and beauty which played a prominent role in Pythagoras' philosophy was the way in which musical tones can be arranged in mathematical sequences, which repeat at regular intervals called octaves.Different cultures have deified beauty, typically in female forms. Here is a list of the goddesses of beauty in three different mythologies



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