|
Lime Plaster
Lime plaster is a type of plaster composed of sand, water, and lime, usually non-hydraulic hydrated lime (also known as slaked lime, high calcium lime or air lime). Ancient lime plaster often contained horse hair for reinforcement and pozzolan additives to reduce the working time. Traditional non-hydraulic hydrated lime only sets through carbonatation when the plaster is kept moist and access of CO2 from the air is possible. It will not set when submersed in water. When a very thick layer or several layers are applied, the lime can remain soft for weeks. The curing time of lime plaster can be shortened by using (natural) hydraulic lime or adding pozzolan additives, transforming it into artificially hydraulic lime. In ancient times, Roman lime plaster incorporated pozzolanic volcanic ash; in modern times, fly ash is preferred. Non-hydraulic lime plaster can also be made to set faster by adding gypsum. Lime production for use in plastering home-made cisterns (in making them ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plaster - Putz In Pompeji
Plaster is a building material used for the protective or decorative coating of walls and ceilings and for moulding and casting decorative elements. In English, "plaster" usually means a material used for the interiors of buildings, while "render" commonly refers to external applications. Another imprecise term used for the material is stucco, which is also often used for plasterwork that is worked in some way to produce relief decoration, rather than flat surfaces. The most common types of plaster mainly contain either gypsum, lime, or cement,Franz Wirsching "Calcium Sulfate" in Ullmann's Encyclopedia of Industrial Chemistry, 2012 Wiley-VCH, Weinheim. but all work in a similar way. The plaster is manufactured as a dry powder and is mixed with water to form a stiff but workable paste immediately before it is applied to the surface. The reaction with water liberates heat through crystallization and the hydrated plaster then hardens. Plaster can be relatively easily worked wit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diffusion
Diffusion is the net movement of anything (for example, atoms, ions, molecules, energy) generally from a region of higher concentration to a region of lower concentration. Diffusion is driven by a gradient in Gibbs free energy or chemical potential. It is possible to diffuse "uphill" from a region of lower concentration to a region of higher concentration, like in spinodal decomposition. The concept of diffusion is widely used in many fields, including physics (particle diffusion), chemistry, biology, sociology, economics, and finance (diffusion of people, ideas, and price values). The central idea of diffusion, however, is common to all of these: a substance or collection undergoing diffusion spreads out from a point or location at which there is a higher concentration of that substance or collection. A gradient is the change in the value of a quantity, for example, concentration, pressure, or temperature with the change in another variable, usually distance. A change in c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Akhenaten
Akhenaten (pronounced ), also spelled Echnaton, Akhenaton, ( egy, ꜣḫ-n-jtn ''ʾŪḫə-nə-yātəy'', , meaning "Effective for the Aten"), was an ancient Egyptian pharaoh reigning or 1351–1334 BC, the tenth ruler of the Eighteenth Dynasty. Before the fifth year of his reign, he was known as Amenhotep IV ( egy, jmn-ḥtp, links=no, meaning " Amun is satisfied", Hellenized as ''Amenophis IV''). As a pharaoh, Akhenaten is noted for abandoning Egypt's traditional polytheism and introducing Atenism, or worship centered around Aten. The views of Egyptologists differ as to whether the religious policy was absolutely monotheistic, or whether it was monolatry, syncretistic, or henotheistic. This culture shift away from traditional religion was reversed after his death. Akhenaten's monuments were dismantled and hidden, his statues were destroyed, and his name excluded from lists of rulers compiled by later pharaohs. Traditional religious practice was gradually resto ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amarna
Amarna (; ar, العمارنة, al-ʿamārnah) is an extensive Egyptian archaeological site containing the remains of what was the capital city of the late Eighteenth Dynasty. The city was established in 1346 BC, built at the direction of the Pharaoh Akhenaten, and abandoned shortly after his death in 1332 BC. The name that the ancient Egyptians used for the city is transliterated in English as Akhetaten or Akhetaton, meaning " the horizon of the Aten".David (1998), p. 125 The site is on the east bank of the Nile River, in what today is the Egyptian province of Minya. It is about south of the city of al-Minya, south of the Egyptian capital, Cairo, and north of Luxor (site of the previous capital, Thebes). The city of Deir Mawas lies directly to its west. On the east side of Amarna there are several modern villages, the chief of which are l-Till in the north and el-Hagg Qandil in the south. Activity in the region flourished from the Amarna Period until the later Roman e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tarxien Temples
The Tarxien Temples ( mt, It-Tempji ta' Ħal Tarxien, ) are an archaeological complex in Tarxien, Malta. They date to approximately 3150 BC. The site was accepted as a UNESCO World Heritage Site in 1992 along with the other Megalithic temples on the island of Malta. Description The Tarxien Temples consist of three separate, but attached, temple structures. The main entrance is a reconstruction dating from 1956, when the whole site was restored. At the same time, many of the decorated slabs discovered on site were relocated indoors for protection at the Museum of Archaeology in Valletta. The first temple has been dated to approximately 3100 BC and is the most elaborately decorated of the temples of Malta. The middle temple dates to about 3000 BC, and is unique in that, unlike the rest of the Maltese temples, it has three pairs of apses instead of the usual two. The east temple is dated at around 3100 BC. The remains of another temple, smaller, and older, having been dated to 3250 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tenth Dynasty Of Egypt
The Tenth Dynasty of ancient Egypt (Dynasty X) is often combined with the Seventh Dynasty of Egypt, 7th, Eighth Dynasty of Egypt, 8th, Ninth Dynasty of Egypt, 9th and early Eleventh Dynasty of Egypt, 11th Dynasties under the group title First Intermediate Period. Rulers The 9th Dynasty was founded at Herakleopolis Magna, and the 10th Dynasty continued there. At this time Egypt was not unified, and there is some overlap between these and other local dynasties. The Turin Canon lists eighteen kings for this royal line, but their names are damaged, unidentifiable, or lost.Sir Alan Gardiner, ''Egypt of the Pharaohs'', Oxford University Press, 1961, pp. 112-13. The following is a ''possible'' list of rulers of the Tenth Dynasty based on the Turin Canon, as Egyptologists have differing opinions about the order of succession within the two dynasties. Among them, only Wahkare Khety and Merykare are undoubtedly attested by archaeological finds: References Tenth Dynast ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ninth Dynasty Of Egypt
The Ninth Dynasty of ancient Egypt (Dynasty IX) is often combined with the 7th, 8th, 10th and early 11th Dynasties under the group title First Intermediate Period. The dynasty that seems to have supplanted the Eighth Dynasty is extremely obscure. The takeover by the rulers of Herakleopolis was violent and is reflected in Manetho's description of Achthoes, the founder of the dynasty, as 'more terrible than his predecessors', who 'wrought evil things for those in all Egypt". Rulers The Ninth Dynasty was founded at Herakleopolis Magna, and the Tenth Dynasty continued there. At this time Egypt was not unified, and there is some overlap between these and other local dynasties. The Turin Canon lists eighteen kings for this royal line, but their names are damaged, unidentifiable, or lost.Sir Alan Gardiner Sir Alan Henderson Gardiner, (29 March 1879 – 19 December 1963) was an English Egyptologist, linguist, philologist, and independent scholar. He is regarded as one of the pre ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pyramid
A pyramid (from el, πυραμίς ') is a structure whose outer surfaces are triangular and converge to a single step at the top, making the shape roughly a pyramid in the geometric sense. The base of a pyramid can be trilateral, quadrilateral, or of any polygon shape. As such, a pyramid has at least three outer triangular surfaces (at least four faces including the base). The square pyramid, with a square base and four triangular outer surfaces, is a common version. A pyramid's design, with the majority of the weight closer to the ground and with the pyramidion at the apex, means that less material higher up on the pyramid will be pushing down from above. This distribution of weight allowed early civilizations to create stable monumental structures. Civilizations in many parts of the world have built pyramids. The largest pyramid by volume is the Great Pyramid of Cholula, in the Mexican state of Puebla. For thousands of years, the largest structures on Earth were ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Qadad
''Qadad'' ( ''qaḍāḍ'') or ''qudad'' is a waterproof plaster surface, made of a lime plaster treated with slaked lime and oils and fats. The technique is over a thousand years old, with the remains of this early plaster still seen on the standing sluices of the ancient Marib Dam. Volcanic ash, pumice, scoria ( ar, شاش), in the Yemeni dialect, or other crushed volcanic aggregate are often used as pozzolanic agents, reminiscent of ancient Roman lime plaster which incorporated pozzolanic volcanic ash. Due to the slowness of some of the chemical reactions, ''qadad'' mortar can take over a hundred days to prepare, from quarrying of raw materials to the beginning of application to the building. It can also take over a year to set fully. In 2004, a documentary film ''Qudad, Re-inventing a Tradition'' was made by the filmmaker Caterina Borelli. It documents the restoration of the Amiriya Complex, which was awarded the Aga Khan Award for Architecture in 2007. Old method of p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pre-Pottery Neolithic B
Pre-Pottery Neolithic B (PPNB) is part of the Pre-Pottery Neolithic, a Neolithic culture centered in upper Mesopotamia and the Levant, dating to years ago, that is, 8800–6500 BC. It was typed by British archaeologist Kathleen Kenyon during her archaeological excavations at Jericho in the West Bank. Like the earlier PPNA people, the PPNB culture developed from the Mesolithic Natufian culture. However, it shows evidence of a northerly origin, possibly indicating an influx from the region of northeastern Anatolia. Lifestyle Cultural tendencies of this period differ from that of the earlier Pre-Pottery Neolithic A (PPNA) period in that people living during this period began to depend more heavily upon domesticated animals to supplement their earlier mixed agrarian and hunter-gatherer diet. In addition, the flint tool kit of the period is new and quite disparate from that of the earlier period. One of its major elements is the naviform core. This is the first period ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
'Ain Ghazal
El Ain ( ar, العين), Al Ain, or Ain is a village at an elevation of on a foothill of the Anti-Lebanon Mountains in the Baalbek District of the Baalbek-Hermel Governorate, Lebanon. It is famous for agriculture and trade, located on the highway connecting Syrian borders and the Hermel area with Chtaura and Beirut. Its name, Ain, refers to the old water source in it. History In 1838, Eli Smith noted El Ain's population as being predominantly Metawileh.Robinson and Smith, 1841, vol 3, 2nd appendix, p144/ref> Geography and Agriculture The altitude of this village ranges from 900 to 1300 meters above sea level. The village is 125 km away from Beirut Beirut, french: Beyrouth is the capital and largest city of Lebanon. , Greater Beirut has a population of 2.5 million, which makes it the third-largest city in the Levant region. The city is situated on a peninsula at the midpoint o ... situated between the towns of Labwe and Fakiha. Its economy is restricted to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ben-Zvi Institute
Yad Ben Zvi ( he, יד יצחק בן-צבי), also known as the Ben-Zvi Institute, is a research institute and publishing house named for Israeli president Yitzhak Ben-Zvi in Jerusalem. History Yad Ben-Zvi is a research institute established to continue the Zionist, educational and cultural activities of Israel's second and longest serving president, Yizhak Ben–Zvi. It is housed in the home and offices of Ben-Zvi and his wife, Rachel Yanait, in Jerusalem's Rehavia neighborhood. Ben-Zvi founded the institute in 1947 to explore the history and culture of the Jewish communities living in Arab countries. It houses a library of manuscripts, rare books and a photographic archive, and runs an academic publishing house. In 1956, the Institute began its publication of the Annual, '' Sefunot'', a journal that publishes articles on Jewish communities in the East, from the end of the Middle Ages In the history of Europe, the Middle Ages or medieval period lasted approximate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
