Kayak
A kayak is a little human-powered boat. It classically has a covered deck, and a cockpit covered by a spray deck. It is propelled by a double-bladed paddle by sitting paddlers. The kayak was used by the inhabitant Ainu, Aleut and Eskimo hunters in sub-arctic regions of northeastern Asia, North America and Greenland. Modern kayaks come in a wide diversity of designs and materials for particular purposes. Kayaks are frequently referred to as canoes in Great Britain and Ireland.
Traditional kayaks typically accommodate one, two or infrequently three paddlers who sit facing ahead in one or more cockpits below the deck of the boat. If used the spray deck or comparable waterproof garment attach securely to the edges of the cockpit, prevent the entry of water from waves or spray, and making it possible in some styles of boat, to roll the kayak upright again without it filling with water or eject the paddler.
Kayaks differ definitely in design and history from canoes, which are more flat-bottomed boats propel by single-bladed paddles by a kneeling paddler, even though some modern canoes may be difficult for a non-expert to distinguish from a kayak. One benefit to a kayak is that with a canoe's high bow, it is harder to paddle against the wind. As Kayaks do not have such high sides, it is easier to paddle on a breezy day.
Monday, May 28, 2007
Sunday, May 20, 2007
Hovercraft
A hovercraft, or air-cushion vehicle (ACV), is a vehicle or craft that can be hold up by a cushion of air dispossessed downwards against a surface close below it, and can in principle travel over any relatively smooth surface, such as gently sloping land, water, or marshland, while having no substantial contact with it.
Hovercraft has one or more parts of engines (some craft, such as the SR-N6, have one engine with a drive split through a gearbox). One engine drives the fan (the impeller) which is in charge for exciting the vehicle by forcing air under the craft. The air therefore must exit throughout the "skirt", lifting the craft above the area which the craft resides. One or more additional engines are used to offer thrust in order to propel the craft in the favorite direction. Some hovercraft utilized ducting to allow one engine to perform both tasks by directing some of the air to the skirt, the rest of the air passing out of the back to push the craft forward.
A hovercraft, or air-cushion vehicle (ACV), is a vehicle or craft that can be hold up by a cushion of air dispossessed downwards against a surface close below it, and can in principle travel over any relatively smooth surface, such as gently sloping land, water, or marshland, while having no substantial contact with it.
Hovercraft has one or more parts of engines (some craft, such as the SR-N6, have one engine with a drive split through a gearbox). One engine drives the fan (the impeller) which is in charge for exciting the vehicle by forcing air under the craft. The air therefore must exit throughout the "skirt", lifting the craft above the area which the craft resides. One or more additional engines are used to offer thrust in order to propel the craft in the favorite direction. Some hovercraft utilized ducting to allow one engine to perform both tasks by directing some of the air to the skirt, the rest of the air passing out of the back to push the craft forward.
Sunday, May 13, 2007
Folding boat
A Folding boat is frequently a smaller boat, typically ranging between 8 to 12 feet. This style of boat must also allow for easy lifting which require a glow weight. Folding boats are made from light weight resources such as marine plywood, aluminum or more exotic man-made materials lighter and tougher than aluminum. Folding boats fill a need for people who do not have storage gap for a full-size boat or cannot transport a full-size boat.
There are more than a few folding boat makers and folding kayak makers in the world from the USA, England and Australia with several variations and models. The handyman can also produce their own unit at home with plans or buy designing their own version.
Although there is much to be thought by the advantages of a folding boat, they are not common place in boating and aluminum and inflatable alternatives are far more common despite some folding boats having been sold for several decades.
A Folding boat is frequently a smaller boat, typically ranging between 8 to 12 feet. This style of boat must also allow for easy lifting which require a glow weight. Folding boats are made from light weight resources such as marine plywood, aluminum or more exotic man-made materials lighter and tougher than aluminum. Folding boats fill a need for people who do not have storage gap for a full-size boat or cannot transport a full-size boat.
There are more than a few folding boat makers and folding kayak makers in the world from the USA, England and Australia with several variations and models. The handyman can also produce their own unit at home with plans or buy designing their own version.
Although there is much to be thought by the advantages of a folding boat, they are not common place in boating and aluminum and inflatable alternatives are far more common despite some folding boats having been sold for several decades.
Monday, April 02, 2007
Bicycle
A hybrid vehicle (HV) is a vehicle that uses two different power sources such as:
* An on-board rechargeable energy storage system (RESS) and a fueled power source for means of transportation force
* Human powered bicycle with sequence assist
* A sail boat with electric control
The term the commonly refers to petroleum electric hybrid vehicle, also called Hybrid-electric vehicle (HEV) which use internal burning engines and electric batteries to power electric motors.
The term hybrid when used in relative with cars also has other uses. Prior to its modern meaning of hybrid force, the word hybrid was used in the United States to mean a vehicle of mixed countrywide origin; generally, a European car fitted with American mechanical components. This significance has fallen out of use. In the import scene, hybrid was often used to describe an engine swap. Some have also referred to flexible-fuel vehicles as hybrids because they can use a combination of different fuels — naturally gasoline and ethanol alcohol fuel.
A hybrid vehicle (HV) is a vehicle that uses two different power sources such as:
* An on-board rechargeable energy storage system (RESS) and a fueled power source for means of transportation force
* Human powered bicycle with sequence assist
* A sail boat with electric control
The term the commonly refers to petroleum electric hybrid vehicle, also called Hybrid-electric vehicle (HEV) which use internal burning engines and electric batteries to power electric motors.
The term hybrid when used in relative with cars also has other uses. Prior to its modern meaning of hybrid force, the word hybrid was used in the United States to mean a vehicle of mixed countrywide origin; generally, a European car fitted with American mechanical components. This significance has fallen out of use. In the import scene, hybrid was often used to describe an engine swap. Some have also referred to flexible-fuel vehicles as hybrids because they can use a combination of different fuels — naturally gasoline and ethanol alcohol fuel.
Tuesday, March 20, 2007
Carts
Carts have been mention in journalism as far back as the second millennium B.C. The Indian sacred book Rig-Veda states that men and women are as corresponding as two wheels of a cart. Hand-carts pushed by humans have been used approximately the world. In the 19th century, for example, some Mormons traveling across the plains of the United States between 1856 and 1860 used handcarts.
Carts were often used for judicial punishments, both to transport the destined – a public humiliation in itself (in Ancient Rome defeated leaders were often carried in the victorious general's triumph) – and even, in England until its replacement by the whipping post under Queen Elizabeth I, to tie the condemned to the cart-tail and administer him or her a public whipping.
Carts have been mention in journalism as far back as the second millennium B.C. The Indian sacred book Rig-Veda states that men and women are as corresponding as two wheels of a cart. Hand-carts pushed by humans have been used approximately the world. In the 19th century, for example, some Mormons traveling across the plains of the United States between 1856 and 1860 used handcarts.
Carts were often used for judicial punishments, both to transport the destined – a public humiliation in itself (in Ancient Rome defeated leaders were often carried in the victorious general's triumph) – and even, in England until its replacement by the whipping post under Queen Elizabeth I, to tie the condemned to the cart-tail and administer him or her a public whipping.
Sunday, January 21, 2007
Lighthouse of Alexandria
The Pharos of Alexandria was a lighthouse built in the 3rd century BC on the island of Pharos in Alexandria, Egypt to serve as that port's landmark, and later, a lighthouse. With a height variously estimated at between 115 and 135 metres it was among the tallest man-made structures on Earth for many centuries, and was identified as one of the Seven Wonders of the World by classical writers. It ceased operating and was largely destroyed as a result of two earthquakes in the 14th century AD; some of its remains were found on the floor of Alexandria's Eastern Harbour by divers in 1994. More of the remains have subsequently been revealed by satellite imaging.
Constructed from large blocks of light-colored stone, the tower was made up of three stages: a lower square section with a central core, a middle octagonal section, and, at the top, a circular section. At its apex was positioned a mirror which reflected sunlight during the day; a fire was lit at night. Extant Roman coins struck by the Alexandrian mint show that a statue of a triton was positioned on each of the building's 4 corners. A statue of Poseidon stood atop the tower during the Roman period.
The Pharos of Alexandria was a lighthouse built in the 3rd century BC on the island of Pharos in Alexandria, Egypt to serve as that port's landmark, and later, a lighthouse. With a height variously estimated at between 115 and 135 metres it was among the tallest man-made structures on Earth for many centuries, and was identified as one of the Seven Wonders of the World by classical writers. It ceased operating and was largely destroyed as a result of two earthquakes in the 14th century AD; some of its remains were found on the floor of Alexandria's Eastern Harbour by divers in 1994. More of the remains have subsequently been revealed by satellite imaging.
Constructed from large blocks of light-colored stone, the tower was made up of three stages: a lower square section with a central core, a middle octagonal section, and, at the top, a circular section. At its apex was positioned a mirror which reflected sunlight during the day; a fire was lit at night. Extant Roman coins struck by the Alexandrian mint show that a statue of a triton was positioned on each of the building's 4 corners. A statue of Poseidon stood atop the tower during the Roman period.
Monday, January 08, 2007
Conjoined twins
Conjoined twins are monozygotic twins, whose bodies are joined together at birth. This occurs where the single zygote of identical twins fails to separate completely, and the zygote starts to split after day 13 following fertilization. This condition occurs in about 1 in 50,000 human pregnancies. Most conjoined twins are now evaluated for surgery to attempt to separate them into separate functional bodies. The degree of difficulty rises if a vital organ or structure is shared between twins, such as brain, heart or liver.
A chimera is an ordinary person or animal except that some of his or her parts actually came from his or her twin. A chimera may arise either from identical twin fetuses, or from dizygotic fetuses, which can be identified by chromosomal comparisons from various parts of the body. The number of cells derived from each fetus can vary from one part of the body to another, and often leads to characteristic mosaicism skin colouration in human chimeras. A chimera may be a hermaphrodite, composed of cells from a male twin and a female twin.
Conjoined twins are monozygotic twins, whose bodies are joined together at birth. This occurs where the single zygote of identical twins fails to separate completely, and the zygote starts to split after day 13 following fertilization. This condition occurs in about 1 in 50,000 human pregnancies. Most conjoined twins are now evaluated for surgery to attempt to separate them into separate functional bodies. The degree of difficulty rises if a vital organ or structure is shared between twins, such as brain, heart or liver.
A chimera is an ordinary person or animal except that some of his or her parts actually came from his or her twin. A chimera may arise either from identical twin fetuses, or from dizygotic fetuses, which can be identified by chromosomal comparisons from various parts of the body. The number of cells derived from each fetus can vary from one part of the body to another, and often leads to characteristic mosaicism skin colouration in human chimeras. A chimera may be a hermaphrodite, composed of cells from a male twin and a female twin.
Monday, January 01, 2007
Wildlife
The term wildlife refers to living organisms that are not in any way artificial or domesticated and which survive in natural habitats. Wildlife can refer to flora but more usually refers to fauna. Wildlife is a very general term for life in ecosystems. Deserts, rainforests, plains, and other areas including the most built-up urban sites all have distinct forms of wildlife.
Humans have historically tended to split civilization from wildlife in a number of ways; besides the obvious difference in vocabulary, there are differing expectations in the legal, social, and moral sense. This has been a reason for debate during recorded history. Religions have often declared certain animals to be sacred, and in modern times concern for the environment has aggravated activists to protest the exploitation of wildlife for human benefit or entertainment. Literature has also made use of the traditional human separation from wildlife.
The term wildlife refers to living organisms that are not in any way artificial or domesticated and which survive in natural habitats. Wildlife can refer to flora but more usually refers to fauna. Wildlife is a very general term for life in ecosystems. Deserts, rainforests, plains, and other areas including the most built-up urban sites all have distinct forms of wildlife.
Humans have historically tended to split civilization from wildlife in a number of ways; besides the obvious difference in vocabulary, there are differing expectations in the legal, social, and moral sense. This has been a reason for debate during recorded history. Religions have often declared certain animals to be sacred, and in modern times concern for the environment has aggravated activists to protest the exploitation of wildlife for human benefit or entertainment. Literature has also made use of the traditional human separation from wildlife.
Tuesday, December 26, 2006
Etymology of India
India, as a country and nation, has three principal names, in both official and popular usage, each of which is historically and culturally important. All three originally designated a single entity comprise all the modern nations of the Indian subcontinent. The first Article of the Constitution of India, which deals with the official name, states that "India, that is Bharat, shall be a union of states." Thus, not only in usage but officially India and Bharat are both accorded primary status? The name India is derived from the river Indus.
The innovative name of the river came from the fact that in the north-west of the subcontinent, there are seven main tributaries of the one river. The local inhabitants therefore called it Sapta-Sindhu, meaning the seven rivers. As the seven tributaries are part of the one river, the whole river system came to be known in time as Sindhu. In general, Sindhu also means any river or water body in Sanskrit.
India, as a country and nation, has three principal names, in both official and popular usage, each of which is historically and culturally important. All three originally designated a single entity comprise all the modern nations of the Indian subcontinent. The first Article of the Constitution of India, which deals with the official name, states that "India, that is Bharat, shall be a union of states." Thus, not only in usage but officially India and Bharat are both accorded primary status? The name India is derived from the river Indus.
The innovative name of the river came from the fact that in the north-west of the subcontinent, there are seven main tributaries of the one river. The local inhabitants therefore called it Sapta-Sindhu, meaning the seven rivers. As the seven tributaries are part of the one river, the whole river system came to be known in time as Sindhu. In general, Sindhu also means any river or water body in Sanskrit.
Monday, December 18, 2006
Heat wave
A heat wave is a prolonged period of extremely hot weather, which may be accompanied by high humidity. There is no universal definition of a heat wave the term is relative to the usual weather in the area. Temperatures that people from a hotter climate believe normal can be termed a heat wave in a cooler area if they are outside the normal climate pattern for that area. The term is applied both to routine weather variation and to extraordinary spells of heat which may occur only once a century. Severe heat waves have caused catastrophic crop failures, thousands of deaths from hyperthermia, and widespread power outages due to increased use of air conditioning.
Heat waves often occur for the period of the Dog Days of summer; indeed the French term canicule, denoting the general phenomenon of a heat wave, derives from the Italian canicula applied to the star Sirius, also known as the "Dog Star."
Some regions of the globe are more susceptible to heat waves than others, such as Mediterranean-type climates with a summer dry spell which becomes much hotter than usual during certain years
A heat wave is a prolonged period of extremely hot weather, which may be accompanied by high humidity. There is no universal definition of a heat wave the term is relative to the usual weather in the area. Temperatures that people from a hotter climate believe normal can be termed a heat wave in a cooler area if they are outside the normal climate pattern for that area. The term is applied both to routine weather variation and to extraordinary spells of heat which may occur only once a century. Severe heat waves have caused catastrophic crop failures, thousands of deaths from hyperthermia, and widespread power outages due to increased use of air conditioning.
Heat waves often occur for the period of the Dog Days of summer; indeed the French term canicule, denoting the general phenomenon of a heat wave, derives from the Italian canicula applied to the star Sirius, also known as the "Dog Star."
Some regions of the globe are more susceptible to heat waves than others, such as Mediterranean-type climates with a summer dry spell which becomes much hotter than usual during certain years
Wednesday, December 13, 2006
Hinduism
Hinduism Dharma also known as Vaidika is a religion or philosophy that originated from the Indian subcontinent and nearby close areas. The term Hinduism is heterogeneous, as Hinduism consists of several schools of thought. It encompasses many religious rituals that widely vary in practice, as well as many diverse sects and philosophies. Many Hindus, influenced by Advaita philosophy, venerate an array of deities, considering them manifestations of the one supreme monistic Cosmic Spirit, Brahman, while many others focus on a singular concept of Brahman, as in Vaishnavism, Saivism and Shaktism.
Hinduism is the third major religion in the world, with approximately 900 million adherents, of whom approximately 890 million live in India. It is also the oldest known religion in the world today. Unlike many other religions, Hinduism has no main founder. It also has no single holy book — it has many, with all pointing to the same Truth - its original scriptures were the four Vedas, but as time has passed, many other scriptures have also emerged.
Hinduism Dharma also known as Vaidika is a religion or philosophy that originated from the Indian subcontinent and nearby close areas. The term Hinduism is heterogeneous, as Hinduism consists of several schools of thought. It encompasses many religious rituals that widely vary in practice, as well as many diverse sects and philosophies. Many Hindus, influenced by Advaita philosophy, venerate an array of deities, considering them manifestations of the one supreme monistic Cosmic Spirit, Brahman, while many others focus on a singular concept of Brahman, as in Vaishnavism, Saivism and Shaktism.
Hinduism is the third major religion in the world, with approximately 900 million adherents, of whom approximately 890 million live in India. It is also the oldest known religion in the world today. Unlike many other religions, Hinduism has no main founder. It also has no single holy book — it has many, with all pointing to the same Truth - its original scriptures were the four Vedas, but as time has passed, many other scriptures have also emerged.
Monday, November 27, 2006
Synthetic rubber
Another plastic that was critical to the war attempt was "synthetic rubber", which was produced in a range of forms.
The first synthetic rubber polymer was obtained by Lebedev in 1910. Practical imitation rubber grew out of studies published in 1930 written separately by American Wallace Carothers, Russian scientist Lebedev and the German scientist Hermann Staudinger. These studies led in 1931 to one of the first winning synthetic rubbers, known as "neoprene", which was residential at DuPont under the direction of E.K. Bolton. Neoprene is highly unwilling to heat and chemicals such as oil and gasoline, and is used in fuel hoses and as an insulating material in machinery.
Worldwide natural rubber goods were limited and by mid-1942 most of the rubber-producing regions were under Japanese control. Military trucks wanted rubber for tires, and rubber was used in almost every other war machine. The U.S. government launched a major effort to expand and refine synthetic rubber. A principal scientist concerned with the effort was Edward Robbins.
Another plastic that was critical to the war attempt was "synthetic rubber", which was produced in a range of forms.
The first synthetic rubber polymer was obtained by Lebedev in 1910. Practical imitation rubber grew out of studies published in 1930 written separately by American Wallace Carothers, Russian scientist Lebedev and the German scientist Hermann Staudinger. These studies led in 1931 to one of the first winning synthetic rubbers, known as "neoprene", which was residential at DuPont under the direction of E.K. Bolton. Neoprene is highly unwilling to heat and chemicals such as oil and gasoline, and is used in fuel hoses and as an insulating material in machinery.
Worldwide natural rubber goods were limited and by mid-1942 most of the rubber-producing regions were under Japanese control. Military trucks wanted rubber for tires, and rubber was used in almost every other war machine. The U.S. government launched a major effort to expand and refine synthetic rubber. A principal scientist concerned with the effort was Edward Robbins.
Wednesday, November 08, 2006
Arthurian legend
Stonehenge is also mentioned within Arthurian legend. Geoffrey of Monmouth said that Merlin the wizard directed its removal from Ireland, where it had been constructed on Mount Killaraus by Giants, who brought the stones from Africa. After it had been rebuilt near Amesbury, Geoffrey further narrates how first Ambrosius Aurelianus, then Uther Pendragon, and finally Constantine III, were buried inside the ring of stones. In many places in his Historia Regum Britanniae Geoffrey mixes British legend and his own imagination; it is intriguing that he connects Ambrosius Aurelianus with this prehistoric monument, seeing how there is place-name evidence to connect Ambrosius with nearby Amesbury.In World Mythology: An Anthology of the Great Myths and Epics by Donna Rosenburg, on pp. 428-30, she summarizes the Stonehenge story of the definitive Arthur legend. By this the reader learns that, according to the legend of King Arthur, the rocks of Stonehenge were paganistic healing rocks from Africa. Giants brought them from Africa to Ireland for their demonic healing properties. The second King of Britain, Aurelius Ambrosias wished to erect a memorial to the nobles who had died in battle with the Saxons. Those nobles were buried near Salisbury. With the help of Merlin, Aurelius made Stonehenge that monument. So the King sent Merlin, Uther Pendragon and 15,000 knights to Ireland to retrieve the rocks. They slew 7,000 Irish. As the knights tried to move the rocks with ropes and force, they failed. Then Merlin whispered witchcraft incantations over the rocks and they became as light as pebbles. Then Stonehenge was dedicated in Britain. Shortly after, Aurelius died and was buried within the Stonehenge monument, or "The Giants' Ring of Stonehenge".
Stonehenge is also mentioned within Arthurian legend. Geoffrey of Monmouth said that Merlin the wizard directed its removal from Ireland, where it had been constructed on Mount Killaraus by Giants, who brought the stones from Africa. After it had been rebuilt near Amesbury, Geoffrey further narrates how first Ambrosius Aurelianus, then Uther Pendragon, and finally Constantine III, were buried inside the ring of stones. In many places in his Historia Regum Britanniae Geoffrey mixes British legend and his own imagination; it is intriguing that he connects Ambrosius Aurelianus with this prehistoric monument, seeing how there is place-name evidence to connect Ambrosius with nearby Amesbury.In World Mythology: An Anthology of the Great Myths and Epics by Donna Rosenburg, on pp. 428-30, she summarizes the Stonehenge story of the definitive Arthur legend. By this the reader learns that, according to the legend of King Arthur, the rocks of Stonehenge were paganistic healing rocks from Africa. Giants brought them from Africa to Ireland for their demonic healing properties. The second King of Britain, Aurelius Ambrosias wished to erect a memorial to the nobles who had died in battle with the Saxons. Those nobles were buried near Salisbury. With the help of Merlin, Aurelius made Stonehenge that monument. So the King sent Merlin, Uther Pendragon and 15,000 knights to Ireland to retrieve the rocks. They slew 7,000 Irish. As the knights tried to move the rocks with ropes and force, they failed. Then Merlin whispered witchcraft incantations over the rocks and they became as light as pebbles. Then Stonehenge was dedicated in Britain. Shortly after, Aurelius died and was buried within the Stonehenge monument, or "The Giants' Ring of Stonehenge".
Wednesday, November 01, 2006
Disk of the Milky
The major disk of the Milky Way Galaxy is about 80,000 to 100,000 light years in diameter, about 250-300 thousand light years in circumference, and outside the Galactic core, about 1,000 light years in thickness. It is calm of 200 to 400 billion stars. As a guide to the relative physical scale of the Milky Way, if the galaxy were reduced to 130 km in diameter, the solar system would be a mere 2 mm in width. The Galactic Halo enlarges out to 250,000 to 400,000 light years in diameter. As detailed in the Structure section below, new discoveries indicate that the disk extends much farther than previously thought.The Milky Way's absolute magnitude, which cannot be measured directly, is assumed by astronomical convention to be -20.5, although other authors give an absolute magnitude of -21.3.
The major disk of the Milky Way Galaxy is about 80,000 to 100,000 light years in diameter, about 250-300 thousand light years in circumference, and outside the Galactic core, about 1,000 light years in thickness. It is calm of 200 to 400 billion stars. As a guide to the relative physical scale of the Milky Way, if the galaxy were reduced to 130 km in diameter, the solar system would be a mere 2 mm in width. The Galactic Halo enlarges out to 250,000 to 400,000 light years in diameter. As detailed in the Structure section below, new discoveries indicate that the disk extends much farther than previously thought.The Milky Way's absolute magnitude, which cannot be measured directly, is assumed by astronomical convention to be -20.5, although other authors give an absolute magnitude of -21.3.
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