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Sakia
A sāqiyah or saqiya (), also spelled sakia or saqia) is a mechanical water lifting device. It is also called a Persian wheel, tablia, rehat, and in Latin tympanum. It is similar in function to a scoop wheel, which uses buckets, jars, or scoops fastened either directly to a vertical wheel, or to an endless belt activated by such a wheel. The vertical wheel is itself attached by a drive shaft to a horizontal wheel, which is traditionally set in motion by animal power ( oxen, donkeys, etc.) Because it is not using the power of flowing water, the sāqiyah is different from a noria and any other type of water wheel. The sāqiyah is still used in India, Egypt and other parts of the Middle East, and in the Iberian Peninsula and the Balearic Islands. It may have been invented in Ptolemaic Kingdom of Egypt, Iran, Kush or India. The sāqiyah was mainly used for irrigation, but not exclusively, as the example of Qusayr 'Amra shows, where it was used at least in part to provide water for ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Undershot Wheel
A water wheel is a machine for converting the kinetic energy of flowing or falling water into useful forms of power, often in a watermill. A water wheel consists of a large wheel (usually constructed from wood or metal), with numerous blades or buckets attached to the outer rim forming the drive mechanism. Water wheels were still in commercial use well into the 20th century, although they are no longer in common use today. Water wheels are used for milling flour in gristmills, grinding wood into pulp for papermaking, hammering wrought iron, machining, ore crushing and pounding fibre for use in the manufacture of cloth. Some water wheels are fed by water from a mill pond, which is formed when a flowing stream is dammed. A channel for the water flowing to or from a water wheel is called a mill race. The race bringing water from the mill pond to the water wheel is a headrace; the one carrying water after it has left the wheel is commonly referred to as a tailrace. Waterwheels ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chain Pump
The chain pump is type of a water pump in which several circular discs are positioned on an endless chain. One part of the chain dips into the water, and the chain runs through a tube, slightly bigger than the diameter of the discs. As the chain is drawn up the tube, water becomes trapped between the discs and is lifted to and discharged at the top. Chain pumps were used for centuries in the ancient Middle East, Europe, and China. In the Near East and Europe The earliest evidence for this device is in a Babylonian text from about 700 B.C. They were commonly powered by humans or animals. The device then appeared in ancient Egypt from about 200 B.C., featuring a pair of gear-wheels. A version of the chain pump was used in ancient Greece and Rome, sometimes with pots, or scoops fixed to the chain, which, as they passed over the top pulley, tipped the water out; a 2nd-century example is preserved in London. Philo of Byzantium wrote of such a device in the 2nd century B.C.; the historia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Noria
A noria (, ''nā‘ūra'', plural ''nawāʿīr'', from , ''nā‘orā'', lit. "growler") is a hydropowered '' scoop wheel'' used to lift water into a small aqueduct, either for the purpose of irrigation or to supply water to cities and villages. Name and meaning Etymology The English word ''noria'' is derived via Spanish ''noria'' from Arabic ''nā‘ūra'' (ناعورة), which comes from the Arabic verb meaning to "groan" or "grunt", in reference to the sound it made when turning. ''Noria'' versus ''saqiyah'' The term ''noria'' is commonly used for devices which use the power of moving water to turn the wheel. For devices powered by animals, the usual term is '' saqiyah'' or ''saqiya''. Other types of similar devices are grouped under the name of chain pumps. However, the names of traditional water-raising devices used in the Middle East, India, Spain and other areas are often used loosely and overlappingly, or vary depending on region. Al-Jazari's book on mechanical d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The "Persian Wheel
''The'' is a grammatical article in English, denoting nouns that are already or about to be mentioned, under discussion, implied or otherwise presumed familiar to listeners, readers, or speakers. It is the definite article in English. ''The'' is the most frequently used word in the English language; studies and analyses of texts have found it to account for seven percent of all printed English-language words. It is derived from gendered articles in Old English which combined in Middle English and now has a single form used with nouns of any gender. The word can be used with both singular and plural nouns, and with a noun that starts with any letter. This is different from many other languages, which have different forms of the definite article for different genders or numbers. Pronunciation In most dialects, "the" is pronounced as (with the voiced dental fricative followed by a schwa) when followed by a consonant sound, and as (homophone of the archaic pronoun ''thee' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Maghreb
The Maghreb (; ), also known as the Arab Maghreb () and Northwest Africa, is the western part of the Arab world. The region comprises western and central North Africa, including Algeria, Libya, Mauritania, Morocco, and Tunisia. The Maghreb also includes the territorial dispute, disputed territory of Western Sahara. As of 2018, the region had a population of over 100 million people. The Maghreb is usually defined as encompassing much of the northern part of Africa, including a large portion of the Sahara Desert, but excluding Egypt and the Sudan, which are considered to be located in the Mashriq — the eastern part of the Arab world. The traditional definition of the Maghreb — which restricted its scope to the Atlas Mountains and the coastal plains of Morocco, Algeria, Tunisia and Libya — was expanded in modern times to include Mauritania and the disputed territory of Western Sahara. During the era of al-Andalus on the Iberian Peninsula (711–1492), the Maghreb's inhabita ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Working Animal
A working animal is an animal, usually domesticated, that is kept by humans and trained to perform tasks. Some are used for their physical strength (e.g. oxen and draft horses) or for transportation (e.g. riding horses and camels), while others are service animals trained to execute certain specialized tasks (e.g. hunting and guide dogs, messenger pigeons, and fishing cormorants). They may also be used for milking or herding. Some, at the end of their working lives, may also be used for meat or leather. The history of working animals may predate agriculture as dogs were used by hunter-gatherer ancestors; around the world, millions of animals work in relationship with their owners. Domesticated species are often bred for different uses and conditions, especially horses and working dogs. Working animals are usually raised on farms, though some are still captured from the wild, such as dolphins and some Asian elephants. People have found uses for a wide variety of abili ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hot-dip Galvanizing
Hot-dip galvanization is a form of galvanization. It is the process of coating iron and steel with zinc, which alloys with the surface of the base metal when immersing the metal in a bath of molten zinc at a temperature of around . When exposed to the atmosphere, the pure zinc (Zn) reacts with oxygen (Oxygen, O2) to form zinc oxide (ZnO), which further reacts with carbon dioxide (CO2, CO2) to form zinc carbonate (Smithsonite, ZnCO3), a usually dull grey, fairly strong material that protects the steel underneath from further corrosion in many circumstances. Galvanized steel is widely used in applications where corrosion resistance is needed without the cost of stainless steel, and is considered superior in terms of cost and life-cycle. It can be identified by the crystallization patterning on the surface (often called a "spangle"). Galvanized steel can be welded; however, one must exercise caution around the resulting toxic zinc fumes. Galvanized fumes are released when the ga ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ismail Al-Jazari
Badīʿ az-Zaman Abu l-ʿIzz ibn Ismāʿīl ibn ar-Razāz al-Jazarī (1136–1206, , ) was a Muslim polymath: a scholar, inventor, mechanical engineer, artisan and artist from the Artuqid Dynasty of Jazira in Mesopotamia. He is best known for writing ''The Book of Knowledge of Ingenious Mechanical Devices'' (, also known as ''Automata'') in 1206, where he described 50 mechanical devices, along with instructions on how to construct them. One of his more famous inventions is the elephant clock. He has been described as the "father of robotics" and modern day engineering. Biography Al-Jazari was born in the area of Upper Mesopotamia in 1136. Sources state his exact location is unknown, but they speculate he could have been born in Jazirat ibn Umar, where he got the name Jazari from or Al-Jazira which was used to denote Upper Mesopotamia. The only biographical information known about him is contained in his ''Book of Knowledge of Ingenious Mechanical Devices''. Like his father ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spain
Spain, or the Kingdom of Spain, is a country in Southern Europe, Southern and Western Europe with territories in North Africa. Featuring the Punta de Tarifa, southernmost point of continental Europe, it is the largest country in Southern Europe and the fourth-most populous European Union member state. Spanning across the majority of the Iberian Peninsula, its territory also includes the Canary Islands, in the Eastern Atlantic Ocean, the Balearic Islands, in the Western Mediterranean Sea, and the Autonomous communities of Spain#Autonomous cities, autonomous cities of Ceuta and Melilla, in mainland Africa. Peninsular Spain is bordered to the north by France, Andorra, and the Bay of Biscay; to the east and south by the Mediterranean Sea and Gibraltar; and to the west by Portugal and the Atlantic Ocean. Spain's capital and List of largest cities in Spain, largest city is Madrid, and other major List of metropolitan areas in Spain, urban areas include Barcelona, Valencia, Seville, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Córdoba, Spain
Córdoba ( ; ), or sometimes Cordova ( ), is a city in Andalusia, Spain, and the capital of the Province of Córdoba (Spain), province of Córdoba. It is the third most populated Municipalities in Spain, municipality in Andalusia. The city primarily lies on the right bank of the Guadalquivir in the south of the Iberian Peninsula. Once a Colonia (Roman), Roman colonia, it was taken over by the Visigothic Kingdom followed by the Muslim conquest of the Iberian Peninsula, Muslim conquest in the eighth century. Córdoba became the capital of the Umayyad state of Córdoba, Emirate and then Caliphate of Córdoba, from which the Umayyad dynasty ruled all of al-Andalus until 1031. Under Umayyad rule, Córdoba was transformed into a centre of education and learning, and by the 10th century it had grown to be the second-largest city in Europe. The caliphate experienced a manifold political crisis in the early 11th century that brought about state collapse. Following the Siege of Córdoba ( ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Albolafia
The Albolafia, also known as the ''Molino de la Albolafia'' in Spanish language, Spanish ('the Albolafia's mill'), is a medieval noria (or Water wheel, waterwheel) on the Guadalquivir, Guadalquivir River in the Historic centre of Córdoba, historic center of Córdoba, Spain, Córdoba, Spain. It is one of several Mills of the Guadalquivir, historic watermills of Cordoba and is located close to the Roman bridge of Córdoba, Roman Bridge and to the Alcázar de los Reyes Cristianos, Christian Alcazar. It is commonly believed to date from the Al-Andalus, Islamic era of the city, though its exact origins are uncertain. Etymology According to Spanish scholar Felix Hernández Giménez, the name ''Albolafia'', with an Arabic meaning equivalent to "good luck" or "good health", came from an architect called Abu l-Afiya who renovated and improved the noria in the 12th century. The name Abu al-Afiya is also attributed to "a Jewish merchant tasked to create a more efficient chain pump that wo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Syria
Syria, officially the Syrian Arab Republic, is a country in West Asia located in the Eastern Mediterranean and the Levant. It borders the Mediterranean Sea to the west, Turkey to Syria–Turkey border, the north, Iraq to Iraq–Syria border, the east and southeast, Jordan to Jordan–Syria border, the south, and Israel and Lebanon to Lebanon–Syria border, the southwest. It is a republic under Syrian transitional government, a transitional government and comprises Governorates of Syria, 14 governorates. Damascus is the capital and largest city. With a population of 25 million across an area of , it is the List of countries and dependencies by population, 57th-most populous and List of countries and dependencies by area, 87th-largest country. The name "Syria" historically referred to a Syria (region), wider region. The modern state encompasses the sites of several ancient kingdoms and empires, including the Eblan civilization. Damascus was the seat of the Umayyad Caliphate and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
