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Hindu Science
The history of science and technology on the Indian subcontinent begins with the prehistoric human activity of the Indus Valley Civilisation to the early Indian states and empires. Prehistory By 5500 BCE a number of sites similar to Mehrgarh (modern-day Pakistan) had appeared, forming the basis of later chalcolithic cultures. The inhabitants of these sites maintained trading relations with Central Asia and the Near East.Kenoyer, 230 Irrigation was developed in the Indus Valley Civilization by around 4500 BCE. The size and prosperity of the Indus civilization grew as a result of this innovation, which eventually led to more planned settlements making use of drainage and sewerage.Rodda & Ubertini, 279 Sophisticated irrigation and water storage systems were developed by the Indus Valley Civilization, including artificial reservoirs at Girnar dated to 3000 BCE, and an early canal irrigation system from c. 2600 BCE. Cotton was cultivated in the region by the 5th–4 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Technical Standard
A technical standard is an established Social norm, norm or requirement for a repeatable technical task which is applied to a common and repeated use of rules, conditions, guidelines or characteristics for products or related processes and production methods, and related management systems practices. A technical standard includes definition of terms; classification of components; delineation of procedures; specification of dimensions, materials, performance, designs, or operations; measurement of quality and quantity in describing materials, processes, products, systems, services, or practices; test methods and sampling procedures; or descriptions of fit and measurements of size or strength. It is usually a formal document that establishes uniform engineering or technical criteria, methods, processes, and practices. In contrast, a custom, convention, company product, corporate standard, and so forth that becomes generally accepted and dominant is often called a ''de facto'' standar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hearth
A hearth () is the place in a home where a fire is or was traditionally kept for home heating and for cooking, usually constituted by a horizontal hearthstone and often enclosed to varying degrees by any combination of reredos (a low, partial wall behind a hearth), fireplace, oven, smoke hood, or chimney. Hearths are usually composed of masonry such as brick or rock (geology), stone. For millennia, the hearth was such an integral part of a home, usually its central and most important feature, that the concept has been metonym, generalized to refer to a homeplace or household, as in the terms "hearth and home" and "keep the home fires burning". In the modern era, since the advent of central heating, hearths are usually less central to most people's daily life because the heating of the home is instead done by a Furnace (house heating), furnace or a heating stove, and cooking is instead done with a kitchen stove/range (combination cooktop and oven) alongside other home appliances ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kalibangan
Kalibangān is a town located at on the left or southern banks of the Ghaggar (Ghaggar-Hakra River) in Tehsil Pilibangān, between Suratgarh and Hanumangarh in Hanumangarh District, Rajasthan, India 205 km from Bikaner. It is also identified as being established in the triangle of land at the confluence of Drishadvati and Sarasvati Rivers. The prehistoric and pre-Mauryan character of Indus Valley civilization was first identified by Luigi Tessitori at this site. Kalibangan's excavation report was published in its entirety in 2003 by the Archaeological Survey of India, 34 years after the completion of excavations. The report concluded that Kalibangan was a major provincial capital of the Indus Valley Civilization. Kalibangan is distinguished by its unique fire altars and "world's earliest attested ploughed field". It is around 2900 BC that the region of Kalibangan developed into what can be considered a planned city. Kalibangan was first excavated under the Direc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oven
upA double oven A ceramic oven An oven is a tool that is used to expose materials to a hot environment. Ovens contain a hollow chamber and provide a means of heating the chamber in a controlled way. In use since antiquity, they have been used to accomplish a wide variety of tasks requiring controlled heating. Because they are used for a variety of purposes, there are many different types of ovens. These types differ depending on their intended purpose and based upon how they generate heat. Ovens are often used for cooking, usually baking, sometimes broiling; they can be used to heat food to a desired temperature. Ovens are also used in the manufacturing of ceramics and pottery; these ovens are sometimes referred to as kilns. Metallurgical furnaces are ovens used in the manufacturing of metals, while glass furnaces are ovens used to produce glass. There are many methods by which different types of ovens produce heat. Some ovens heat materials using the combustion of a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ceramic
A ceramic is any of the various hard, brittle, heat-resistant, and corrosion-resistant materials made by shaping and then firing an inorganic, nonmetallic material, such as clay, at a high temperature. Common examples are earthenware, porcelain, and brick. The earliest ceramics made by humans were fired clay bricks used for building house walls and other structures. Other pottery objects such as pots, vessels, vases and figurines were made from clay, either by itself or mixed with other materials like silica, hardened by sintering in fire. Later, ceramics were glazed and fired to create smooth, colored surfaces, decreasing porosity through the use of glassy, amorphous ceramic coatings on top of the crystalline ceramic substrates. Ceramics now include domestic, industrial, and building products, as well as a wide range of materials developed for use in advanced ceramic engineering, such as semiconductors. The word '' ceramic'' comes from the Ancient Greek word (), meaning ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Metallurgical Furnace
A metallurgical furnace, often simply referred to as a furnace when the context is known, is an industrial furnace used to heat, melt, or otherwise process metals. Furnaces have been a central piece of equipment throughout the history of metallurgy; processing metals with heat is even its own engineering specialty known as pyrometallurgy. One important furnace application, especially in iron and steel production, is smelting, where metal ores are Redox, reduced under high heat to separate the metal content from mineral gangue. The heat energy to fuel a furnace may be supplied directly by fuel combustion or by electricity. Different processes and the unique properties of specific metals and ores have led to many different furnace types. Air blast furnaces Many furnace designs for smelting combine ore, fuel, and other reagents like flux in a single chamber. Mechanisms, such as bellows or motorized fans, then drive pressurized blasts of air into the chamber. These blasts make the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kot Bala
Kot Bala, or Balakot is an archaeological site located in Lasbela District, Balochistan, Pakistan. It is near the Makran coast of the Arabian Sea, and goes back to around 4000 BC. The settlement of Balakot precedes the Indus Valley civilization by many centuries. It is located in the interior of the Sonmiani Bay, along the Lasbela coast (the Plain of Las Bela). This site is of importance due to its proximity to the Arabian Sea, and is believed to have been a main harbour, from which the Indus traders sailed to the coasts of the Arabian Peninsula. Excavations The site was excavated by Professor George F. Dales of the University of California, Berkeley in the 1970s, but full details were not published. It is the only site in the region that was professionally excavated. The upper levels of the site belong to Indus Civilization, while the lower levels feature a culture of its own. The arrival of Indus influence was rather sudden. Balakot culture The ancient Balakot culture ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Balakot
Balakot (; ; ) is a town in Mansehra district, Khyber Pakhtunkhwa, Pakistan. The town was significantly damaged during the 2005 Kashmir earthquake but was later rebuilt with the assistance of the Government of Pakistan. Geography Balakot is located on the right bank of the Kunhar River in northern Pakistan. It is almost two-thirds of the length of the river from its origin at Lake Dharam Sar deep in the Kaghan Valley before its confluence with the Jehlum River. The lower area below Balakot, sometimes referred to as Nainsukh Valley, is temperate, while Kaghan Valley above Balakot City is cold enough to turn the whole area to freezing in the winter. Kaghan valley is a pleasant summer destination. Its upper part from Naran upstream lacks the monsoon, but the lower part gets it well, and so it is forested. Climate Balakot has a humid subtropical climate (Köppen climate classification ''Cfa'') with hot summers and cool winters. Rainfall in Balakot is much higher than in mo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hydrography
Hydrography is the branch of applied sciences which deals with the measurement and description of the physical features of oceans, seas, coastal areas, lakes and rivers, as well as with the prediction of their change over time, for the primary purpose of safety of navigation and in support of all other marine activities, including economic development, security and defense, scientific research, and environmental protection. History The origins of hydrography lay in the making of charts to aid navigation, by individual mariners as they navigated into new waters. These were usually the private property, even closely held secrets, of individuals who used them for commercial or military advantage. As transoceanic trade and exploration increased, hydrographic surveys started to be carried out as an exercise in their own right, and the commissioning of surveys was increasingly done by governments and special hydrographic offices. National organizations, particularly navies, realize ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lothal
Lothal () was one of the southernmost sites of the ancient Indus Valley civilization, Indus Valley civilisation, located in the Bhal region of the Indian state of Gujarat. Construction of the city is believed to have begun around 2200 BCE. Discovery The Archaeological Survey of India (ASI), the official Government of India, Indian government List of agencies of the government of India, agency for the preservation of ancient monuments, discovered Lothal in 1954. Excavation work in Lothal commenced on 13 February 1955 and continued till 19 May 1960. According to the ASI, arguably Lothal had the world's earliest known dock (maritime), dock, which connected the city to an ancient course of the Sabarmati River on the trade route. This trade route stretched between Harappan cities in Sindh (Pakistan) and the peninsula of Saurashtra (region), Saurashtra where the surrounding Kutch desert of today was a part of the Arabian Sea. However, this interpretation has been challenged by other ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
