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98-561: Xinzheng is considered one of the birthplaces of the Chinese nation. More than 8000 years ago, neolithic people of Peiligang culture lived in the vicinity. The legendary Yellow Emperor was said to have been born in Xinzheng 5000 years ago. During the Zhou dynasty it was the capital of the state of Zheng and later, the state of Han , after the conquest of the former by the latter. It was

196-504: A location identifier , is a three-letter geocode designating many airports and metropolitan areas around the world, defined by the International Air Transport Association (IATA). The characters prominently displayed on baggage tags attached at airport check-in desks are an example of a way these codes are used. The assignment of these codes is governed by IATA Resolution 763, and it

294-581: A Circum Arabian Nomadic Pastoral Complex developed in the period from the climatic crisis of 6200 BC, partly as a result of an increasing emphasis in PPNB cultures upon domesticated animals, and a fusion with Harifian hunter gatherers in the Southern Levant, with affiliate connections with the cultures of Fayyum and the Eastern Desert of Egypt . Cultures practicing this lifestyle spread down

392-536: A culture contemporaneous with the Cishan and Xinglongwa cultures of about 6000–5000 BC, Neolithic cultures east of the Taihang Mountains , filling in an archaeological gap between the two Northern Chinese cultures. The total excavated area is more than 1,200 square yards (1,000 m ; 0.10 ha), and the collection of Neolithic findings at the site encompasses two phases. Between 3000 and 1900 BC,

490-485: A diversified economy, though agriculture and heavy industry dominate the economic landscape. Xinzheng's agriculture involves the cultivation of maize , cotton , tobacco and other industrial crops. The city is well known for its jujube or Chinese Date. At harvest time, large quantities of these fruits are sold in markets, as well as on the side of the roads into the town. Xinzheng is home to several industrial factories, namely cigarette factories, which are located near

588-515: A division into five periods. They also advanced the idea of a transitional stage between the PPNA and PPNB between 8800 and 8600 BC at sites like Jerf el Ahmar and Tell Aswad . Alluvial plains ( Sumer / Elam ). Low rainfall makes irrigation systems necessary. Ubaid culture originated from 6200 BC. The earliest evidence of Neolithic culture in northeast Africa was found in the archaeological sites of Bir Kiseiba and Nabta Playa in what

686-412: A dramatic increase in social inequality in most of the areas where it occurred; New Guinea being a notable exception. Possession of livestock allowed competition between households and resulted in inherited inequalities of wealth. Neolithic pastoralists who controlled large herds gradually acquired more livestock, and this made economic inequalities more pronounced. However, evidence of social inequality

784-402: A general lack of interest, left the project unfinished. The airport that serves the provincial capital, Zhengzhou Xinzheng International Airport ( IATA : CGO , ICAO : ZHCC ), is located in Xinzheng. This is of particular importance not only because it is an airport for a large urban center, but because it is the only international airport for the province of 100 million. On February 8, 2009,

882-551: A living tradition in small and extremely remote and inaccessible pockets of West Papua . Polished stone adze and axes are used in the present day (as of 2008 ) in areas where the availability of metal implements is limited. This is likely to cease altogether in the next few years as the older generation die off and steel blades and chainsaws prevail. In 2012, news was released about a new farming site discovered in Munam-ri , Goseong , Gangwon Province , South Korea , which may be

980-567: A new airport is built, replacing the old one, leaving the city's new "major" airport (or the only remaining airport) code to no longer correspond with the city's name. The original airport in Nashville, Tennessee, was built in 1936 as part of the Works Progress Administration and called Berry Field with the designation, BNA. A new facility known as Nashville International Airport was built in 1987 but still uses BNA. This

1078-608: A non-hierarchical system of organization existed is debatable, and there is no evidence that explicitly suggests that Neolithic societies functioned under any dominating class or individual, as was the case in the chiefdoms of the European Early Bronze Age . Possible exceptions to this include Iraq during the Ubaid period and England beginning in the Early Neolithic (4100–3000 BC). Theories to explain

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1176-597: A nonstop air route between Zhengzhou and Taipei – Taoyuan was launched; this route was initially operated by Shenzhen Airlines . As in the rest of China, rail transport in Xinzheng is handled by the China Railway Corporation . Xinzheng itself had a small railroad station, Xinzheng railway station  [ zh ] , at the edge of town that used to accommodate trains on the Beijing–Guangzhou railway , as well as to and from Zhengzhou. It

1274-637: A rarely used and not very useful concept in discussing Australian prehistory . During most of the Neolithic age of Eurasia , people lived in small tribes composed of multiple bands or lineages. There is little scientific evidence of developed social stratification in most Neolithic societies; social stratification is more associated with the later Bronze Age . Although some late Eurasian Neolithic societies formed complex stratified chiefdoms or even states , generally states evolved in Eurasia only with

1372-758: A term coined in the 1920s by the Australian archaeologist Vere Gordon Childe . One potential benefit of the development and increasing sophistication of farming technology was the possibility of producing surplus crop yields, in other words, food supplies in excess of the immediate needs of the community. Surpluses could be stored for later use, or possibly traded for other necessities or luxuries. Agricultural life afforded securities that nomadic life could not, and sedentary farming populations grew faster than nomadic. However, early farmers were also adversely affected in times of famine , such as may be caused by drought or pests . In instances where agriculture had become

1470-509: Is GSN and its IATA code is SPN, and some coincide with IATA codes of non-U.S. airports. Canada's unusual codes—which bear little to no similarity with any conventional abbreviation to the city's name—such as YUL in Montréal , and YYZ in Toronto , originated from the two-letter codes used to identify weather reporting stations in the 1930s. The letters preceding the two-letter code follow

1568-550: Is a large body of evidence for fortified settlements at Linearbandkeramik sites along the Rhine , as at least some villages were fortified for some time with a palisade and an outer ditch. Settlements with palisades and weapon-traumatized bones, such as those found at the Talheim Death Pit , have been discovered and demonstrate that "...systematic violence between groups" and warfare was probably much more common during

1666-627: Is administered by the IATA's headquarters in Montreal , Canada. The codes are published semi-annually in the IATA Airline Coding Directory. IATA provides codes for airport handling entities, and for certain railway stations. Alphabetical lists of airports sorted by IATA code are available. A list of railway station codes , shared in agreements between airlines and rail lines such as Amtrak , SNCF , and Deutsche Bahn ,

1764-652: Is an archaeological period , the final division of the Stone Age in Europe , Asia , Mesopotamia and Africa (c. 10,000 BC to c. 2,000 BC). It saw the Neolithic Revolution , a wide-ranging set of developments that appear to have arisen independently in several parts of the world. This "Neolithic package" included the introduction of farming , domestication of animals , and change from a hunter-gatherer lifestyle to one of settlement . The term 'Neolithic'

1862-617: Is available. However, many railway administrations have their own list of codes for their stations, such as the list of Amtrak station codes . Airport codes arose out of the convenience that the practice brought pilots for location identification in the 1930s. Initially, pilots in the United States used the two-letter code from the National Weather Service (NWS) for identifying cities. This system became unmanageable for cities and towns without an NWS identifier, and

1960-563: Is better explained by lineal fission and polygyny. The shelter of early people changed dramatically from the Upper Paleolithic to the Neolithic era. In the Paleolithic, people did not normally live in permanent constructions. In the Neolithic, mud brick houses started appearing that were coated with plaster. The growth of agriculture made permanent houses far more common. At Çatalhöyük 9,000 years ago, doorways were made on

2058-523: Is different from the name in English, yet the airport code represents only the English name. Examples include: Due to scarcity of codes, some airports are given codes with letters not found in their names: The use of 'X' as a filler letter is a practice to create three-letter identifiers when more straightforward options were unavailable: Some airports in the United States retained their NWS ( National Weather Service ) codes and simply appended an X at

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2156-409: Is divided to three subdistricts, nine towns and three townships. Xinzheng has one of the largest concentrations of foreign teachers in central China due to the presence of Sias International University . The school has over 27,000 students and over 120 foreign teachers and their 40 dependent family members. Along with Sias University, the city is also home to another university: ShengDa. Xinzheng has

2254-513: Is in conjunction to rules aimed to avoid confusion that seem to apply in the United States, which state that "the first and second letters or second and third letters of an identifier may not be duplicated with less than 200 nautical miles separation." Thus, Washington, D.C. area's three airports all have radically different codes: IAD for Washington–Dulles , DCA for Washington–Reagan (District of Columbia Airport), and BWI for Baltimore (Baltimore–Washington International, formerly BAL). Since HOU

2352-648: Is no longer open. However, nearby Zhengzhou is a major railway hub, with services radiating in all directions nationally. As of 2007, high-speed rail service began between Zhengzhou and Beijing. To do any travel beyond the Zhengzhou immediate area, most residents travel to Zhengzhou, then onward. The regional bus station to the north of the town's city center ( 34°26′12″N 113°45′21″E  /  34.436638°N 113.755725°E  / 34.436638; 113.755725 ) serves buses destined for Zhengzhou, Xinmi , Kaifeng , and Luoyang . All Xinzheng taxis belong to

2450-543: Is not followed outside the United States: In addition, since three letter codes starting with Q are widely used in radio communication, cities whose name begins with "Q" also had to find alternate codes, as in the case of: IATA codes should not be confused with the FAA identifiers of U.S. airports. Most FAA identifiers agree with the corresponding IATA codes, but some do not, such as Saipan , whose FAA identifier

2548-540: Is now southwest Egypt. Domestication of sheep and goats reached Egypt from the Near East possibly as early as 6000 BC. Graeme Barker states "The first indisputable evidence for domestic plants and animals in the Nile valley is not until the early fifth millennium BC in northern Egypt and a thousand years later further south, in both cases as part of strategies that still relied heavily on fishing, hunting, and

2646-1024: Is still disputed, as settlements such as Çatalhöyük reveal a lack of difference in the size of homes and burial sites, suggesting a more egalitarian society with no evidence of the concept of capital, although some homes do appear slightly larger or more elaborately decorated than others. Families and households were still largely independent economically, and the household was probably the center of life. However, excavations in Central Europe have revealed that early Neolithic Linear Ceramic cultures (" Linearbandkeramik ") were building large arrangements of circular ditches between 4800 and 4600 BC. These structures (and their later counterparts such as causewayed enclosures , burial mounds , and henge ) required considerable time and labour to construct, which suggests that some influential individuals were able to organise and direct human labour – though non-hierarchical and voluntary work remain possibilities. There

2744-416: Is used for William P. Hobby Airport , the new Houston–Intercontinental became IAH. The code BKK was originally assigned to Bangkok–Don Mueang and was later transferred to Suvarnabhumi Airport , while the former adopted DMK. The code ISK was originally assigned to Gandhinagar Airport (Nashik's old airport) and later on transferred to Ozar Airport (Nashik's current airport). Shanghai–Hongqiao retained

2842-728: The Bronze Age and Iron Age . In other places, the Neolithic followed the Mesolithic (Middle Stone Age) and then lasted until later. In Ancient Egypt , the Neolithic lasted until the Protodynastic period , c. 3150 BC. In China , it lasted until circa 2000 BC with the rise of the pre-Shang Erlitou culture , as it did in Scandinavia . Following the ASPRO chronology , the Neolithic started in around 10,200 BC in

2940-563: The Bronze Age began about 3500 BC, replacing the Neolithic cultures. Around 10,000 BC the first fully developed Neolithic cultures belonging to the phase Pre-Pottery Neolithic A (PPNA) appeared in the Fertile Crescent. Around 10,700–9400 BC a settlement was established in Tell Qaramel , 10 miles (16 km) north of Aleppo . The settlement included two temples dating to 9650 BC. Around 9000 BC during

3038-571: The Canadian transcontinental railroads were built, each station was assigned its own two-letter Morse code : When the Canadian government established airports, it used the existing railway codes for them as well. If the airport had a weather station, authorities added a "Y" to the front of the code, meaning "Yes" to indicate it had a weather station or some other letter to indicate it did not. When international codes were created in cooperation with

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3136-631: The Jordan Valley ; Israel (notably Ain Mallaha , Nahal Oren , and Kfar HaHoresh ); and in Byblos , Lebanon . The start of Neolithic 1 overlaps the Tahunian and Heavy Neolithic periods to some degree. The major advance of Neolithic 1 was true farming. In the proto-Neolithic Natufian cultures, wild cereals were harvested, and perhaps early seed selection and re-seeding occurred. The grain

3234-642: The Levant , arising from the Natufian culture , when pioneering use of wild cereals evolved into early farming . The Natufian period or "proto-Neolithic" lasted from 12,500 to 9,500 BC, and is taken to overlap with the Pre-Pottery Neolithic A (PPNA) of 10,200–8800 BC. As the Natufians had become dependent on wild cereals in their diet, and a sedentary way of life had begun among them,

3332-559: The Longshan culture existed in the middle and lower Yellow River valley areas of northern China. Towards the end of the 3rd millennium BC, the population decreased sharply in most of the region and many of the larger centres were abandoned, possibly due to environmental change linked to the end of the Holocene Climatic Optimum . The 'Neolithic' (defined in this paragraph as using polished stone implements) remains

3430-655: The Red Sea shoreline and moved east from Syria into southern Iraq . The Late Neolithic began around 6,400 BC in the Fertile Crescent . By then distinctive cultures emerged, with pottery like the Halafian (Turkey, Syria, Northern Mesopotamia) and Ubaid (Southern Mesopotamia). This period has been further divided into PNA (Pottery Neolithic A) and PNB (Pottery Neolithic B) at some sites. The Chalcolithic (Stone-Bronze) period began about 4500 BC, then

3528-539: The Rift Valley of East Africa and surrounding areas during a time period known as the Pastoral Neolithic . They were South Cushitic speaking pastoralists, who tended to bury their dead in cairns whilst their toolkit was characterized by stone bowls, pestles, grindstones and earthenware pots. Through archaeology, historical linguistics and archaeogenetics, they conventionally have been identified with

3626-502: The 10th millennium BC. Early development occurred in the Levant (e.g. Pre-Pottery Neolithic A and Pre-Pottery Neolithic B ) and from there spread eastwards and westwards. Neolithic cultures are also attested in southeastern Anatolia and northern Mesopotamia by around 8000 BC. Anatolian Neolithic farmers derived a significant portion of their ancestry from the Anatolian hunter-gatherers (AHG), suggesting that agriculture

3724-730: The Balkans from 6000 BC, and in Central Europe by around 5800 BC ( La Hoguette ). Among the earliest cultural complexes of this area are the Sesklo culture in Thessaly, which later expanded in the Balkans giving rise to Starčevo-Körös (Cris), Linearbandkeramik , and Vinča . Through a combination of cultural diffusion and migration of peoples , the Neolithic traditions spread west and northwards to reach northwestern Europe by around 4500 BC. The Vinča culture may have created

3822-531: The Bronze Age, eventually giving rise to permanently settled farming towns , and later cities and states whose larger populations could be sustained by the increased productivity from cultivated lands. The profound differences in human interactions and subsistence methods associated with the onset of early agricultural practices in the Neolithic have been called the Neolithic Revolution ,

3920-496: The Maltese archipelago) and of Mnajdra (Malta) are notable for their gigantic Neolithic structures, the oldest of which date back to around 3600 BC. The Hypogeum of Ħal-Saflieni , Paola , Malta, is a subterranean structure excavated around 2500 BC; originally a sanctuary, it became a necropolis , the only prehistoric underground temple in the world, and shows a degree of artistry in stone sculpture unique in prehistory to

4018-443: The Maltese islands. After 2500 BC, these islands were depopulated for several decades until the arrival of a new influx of Bronze Age immigrants, a culture that cremated its dead and introduced smaller megalithic structures called dolmens to Malta. In most cases there are small chambers here, with the cover made of a large slab placed on upright stones. They are claimed to belong to a population different from that which built

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4116-651: The Middle East. The neolithization of Northwestern Africa was initiated by Iberian , Levantine (and perhaps Sicilian ) migrants around 5500-5300 BC. During the Early Neolithic period, farming was introduced by Europeans and was subsequently adopted by the locals. During the Middle Neolithic period, an influx of ancestry from the Levant appeared in Northwestern Africa, coinciding with

4214-475: The Neolithic than in the preceding Paleolithic period. This supplanted an earlier view of the Linear Pottery Culture as living a "peaceful, unfortified lifestyle". Control of labour and inter-group conflict is characteristic of tribal groups with social rank that are headed by a charismatic individual – either a ' big man ' or a proto- chief – functioning as a lineage-group head. Whether

4312-781: The PPNA, one of the world's first towns, Jericho , appeared in the Levant. It was surrounded by a stone wall, may have contained a population of up to 2,000–3,000 people, and contained a massive stone tower. Around 6400 BC the Halaf culture appeared in Syria and Northern Mesopotamia. In 1981, a team of researchers from the Maison de l'Orient et de la Méditerranée , including Jacques Cauvin and Oliver Aurenche, divided Near East Neolithic chronology into ten periods (0 to 9) based on social, economic and cultural characteristics. In 2002, Danielle Stordeur and Frédéric Abbès advanced this system with

4410-481: The United States, because "Y" was seldom used in the United States, Canada simply used the weather station codes for its airports, changing the "Y" to a "Z" if it conflicted with an airport code already in use. The result is that most major Canadian airport codes start with "Y" followed by two letters in the city's name (for example, YOW for O tta w a , YWG for W innipe g , YYC for C algar y , or YVR for V ancouve r ), whereas other Canadian airports append

4508-440: The airport itself instead of the city it serves, while another code is reserved which refers to the city itself which can be used to search for flights to any of its airports. For instance: Or using a code for the city in one of the major airports and then assigning another code to another airport: When different cities with the same name each have an airport, they need to be assigned different codes. Examples include: Sometimes,

4606-418: The airport's former name, such as Orlando International Airport 's MCO (for Mc C o y Air Force Base), or Chicago's O'Hare International Airport , which is coded ORD for its original name: Or char d Field. In rare cases, the code comes from the airport's unofficial name, such as Kahului Airport 's OGG (for local aviation pioneer Jimmy H ogg ). In large metropolitan areas, airport codes are often named after

4704-531: The apparent implied egalitarianism of Neolithic (and Paleolithic) societies have arisen, notably the Marxist concept of primitive communism . Genetic evidence indicates that a drop in Y-chromosomal diversity occurred during the Neolithic. Initially believed to be a result of high incidence of violence and high rates of male mortality, more recent analysis suggests that the reduced Y-chromosomal diversity

4802-684: The area". The research team will perform accelerator mass spectrometry (AMS) dating to retrieve a more precise date for the site. In Mesoamerica , a similar set of events (i.e., crop domestication and sedentary lifestyles) occurred by around 4500 BC in South America, but possibly as early as 11,000–10,000 BC. These cultures are usually not referred to as belonging to the Neolithic; in North America, different terms are used such as Formative stage instead of mid-late Neolithic, Archaic Era instead of Early Neolithic, and Paleo-Indian for

4900-554: The area's first Afroasiatic -speaking settlers. Archaeological dating of livestock bones and burial cairns has also established the cultural complex as the earliest center of pastoralism and stone construction in the region. In southeast Europe agrarian societies first appeared in the 7th millennium BC , attested by one of the earliest farming sites of Europe, discovered in Vashtëmi , southeastern Albania and dating back to 6500 BC. In most of Western Europe in followed over

4998-608: The arrival of pastoralism in the region. The earliest evidence for pottery, domestic cereals and animal husbandry is found in Morocco, specifically at Kaf el-Ghar . The Pastoral Neolithic was a period in Africa's prehistory marking the beginning of food production on the continent following the Later Stone Age . In contrast to the Neolithic in other parts of the world, which saw the development of farming societies,

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5096-423: The bow and arrow and ceramic pottery were also introduced. In later periods cities of considerable size developed, and some metallurgy by 700 BC. Australia, in contrast to New Guinea , has generally been held not to have had a Neolithic period, with a hunter-gatherer lifestyle continuing until the arrival of Europeans. This view can be challenged in terms of the definition of agriculture, but "Neolithic" remains

5194-517: The center of town. In 2006, more than US$ 2 billion was invested in a nearby industrial project, although the status of this investment is currently unknown. Mining coal locally has also been an important source of income. Two large private universities, ShengDa University and Sias International University play a major role in the local economy as well. ShengDa has 14,000 students, and Sias University has over 27,000 students. Service industries (restaurants, hotels, banks, retail shops, etc.) to accommodate

5292-532: The city hosts a ceremony honoring the Yellow Emperor , the legendary ancestor of the Chinese nation. In 2009, this celebration attracted over 10,000 Chinese people from within the People's Republic of China , as well as many Overseas Chinese . However, many of these guests find accommodations in nearby Zhengzhou, and the economic impact to the city is minimal. Xinzheng is said to be an 'open-air' museum, and

5390-521: The climatic changes associated with the Younger Dryas (about 10,000 BC) are thought to have forced people to develop farming. The founder crops of the Fertile Crescent were wheat , lentil , pea , chickpeas , bitter vetch, and flax. Among the other major crop domesticated were rice, millet, maize (corn), and potatoes. Crops were usually domesticated in a single location and ancestral wild species are still found. [1] Early Neolithic farming

5488-502: The code SHA, while the newer Shanghai–Pudong adopted PVG. The opposite was true for Berlin : the airport Berlin–Tegel used the code TXL, while its smaller counterpart Berlin–Schönefeld used SXF; the Berlin Brandenburg Airport has the airport code BER, which is also part of its branding. The airports of Hamburg (HAM) and Hannover (HAJ) are less than 100 nautical miles (190 km) apart and therefore share

5586-504: The dead, which were plastered with mud to make facial features. The rest of the corpse could have been left outside the settlement to decay until only the bones were left, then the bones were buried inside the settlement underneath the floor or between houses. Work at the site of 'Ain Ghazal in Jordan has indicated a later Pre-Pottery Neolithic C period. Juris Zarins has proposed that

5684-608: The earliest farmland known to date in east Asia. "No remains of an agricultural field from the Neolithic period have been found in any East Asian country before, the institute said, adding that the discovery reveals that the history of agricultural cultivation at least began during the period on the Korean Peninsula ". The farm was dated between 3600 and 3000 BC. Pottery, stone projectile points, and possible houses were also found. "In 2002, researchers discovered prehistoric earthenware , jade earrings, among other items in

5782-573: The earliest system of writing, the Vinča signs , though archaeologist Shan Winn believes they most likely represented pictograms and ideograms rather than a truly developed form of writing. The Cucuteni-Trypillian culture built enormous settlements in Romania, Moldova and Ukraine from 5300 to 2300 BC. The megalithic temple complexes of Ġgantija on the Mediterranean island of Gozo (in

5880-446: The enclosures also suggest grain and meat storage. The Neolithic 2 (PPNB) began around 8800 BC according to the ASPRO chronology in the Levant ( Jericho , West Bank). As with the PPNA dates, there are two versions from the same laboratories noted above. This system of terminology, however, is not convenient for southeast Anatolia and settlements of the middle Anatolia basin. A settlement of 3,000 inhabitants called 'Ain Ghazal

5978-730: The end. Examples include: A lot of minor airfields without scheduled passenger traffic have ICAO codes but not IATA codes, since the four letter codes allow more number of codes, and IATA codes are mainly used for passenger services such as tickets, and ICAO codes by pilots. In the US, such airfields use FAA codes instead of ICAO. There are airports with scheduled service for which there are ICAO codes but not IATA codes, such as Nkhotakota Airport/Tangole Airport in Malawi or Chōfu Airport in Tokyo, Japan. There are also several minor airports in Russia (e.g., Omsukchan Airport ) which lack IATA codes and instead use internal Russian codes for booking. Flights to these airports cannot be booked through

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6076-520: The first cultivated crop and mark the invention of the technology of farming. This occurred centuries before the first cultivation of grains. Settlements became more permanent, with circular houses, much like those of the Natufians, with single rooms. However, these houses were for the first time made of mudbrick . The settlement had a surrounding stone wall and perhaps a stone tower (as in Jericho). The wall served as protection from nearby groups, as protection from floods, or to keep animals penned. Some of

6174-437: The first form of African food production was mobile pastoralism , or ways of life centered on the herding and management of livestock. The term "Pastoral Neolithic" is used most often by archaeologists to describe early pastoralist periods in the Sahara , as well as in eastern Africa . The Savanna Pastoral Neolithic or SPN (formerly known as the Stone Bowl Culture ) is a collection of ancient societies that appeared in

6272-557: The first three letters of the city in which it is located, for instance: The code may also be a combination of the letters in its name, such as: Sometimes the airport code reflects pronunciation, rather than spelling, namely: For many reasons, some airport codes do not fit the normal scheme described above. Some airports, for example, cross several municipalities or regions, and therefore, use codes derived from some of their letters, resulting in: Other airports—particularly those serving cities with multiple airports—have codes derived from

6370-425: The following format: Most large airports in Canada have codes that begin with the letter "Y", although not all "Y" codes are Canadian (for example, YUM for Yuma, Arizona , and YNT for Yantai , China), and not all Canadian airports start with the letter "Y" (for example, ZBF for Bathurst, New Brunswick ). Many Canadian airports have a code that starts with W, X or Z, but none of these are major airports. When

6468-545: The form of " YYZ ", a song by the rock band Rush , which utilizes the Morse code signal as a musical motif. Some airports have started using their IATA codes as brand names , such as Calgary International Airport (YYC) and Vancouver International Airport (YVR). Numerous New Zealand airports use codes that contain the letter Z, to distinguish them from similar airport names in other countries. Examples include HLZ for Hamilton , ZQN for Queenstown , and WSZ for Westport . Predominantly, airport codes are named after

6566-403: The gathering of wild plants" and suggests that these subsistence changes were not due to farmers migrating from the Near East but was an indigenous development, with cereals either indigenous or obtained through exchange. Other scholars argue that the primary stimulus for agriculture and domesticated animals (as well as mud-brick architecture and other Neolithic cultural features) in Egypt was from

6664-498: The increase in population above the carrying capacity of the land and a high sedentary local population concentration. In some cultures, there would have been a significant shift toward increased starch and plant protein. The relative nutritional benefits and drawbacks of these dietary changes and their overall impact on early societal development are still debated. IATA airport code An IATA airport code , also known as an IATA location identifier , IATA station code , or simply

6762-430: The international air booking systems or have international luggage transferred there, and thus, they are booked instead through the airline or a domestic booking system. Several heliports in Greenland have 3-letter codes used internally which might be IATA codes for airports in faraway countries. There are several airports with scheduled service that have not been assigned ICAO codes that do have IATA codes, especially in

6860-612: The name of the airport itself, for instance: This is also true with some cities with a single airport (even if there is more than one airport in the metropolitan area of said city), such as BDL for Hartford, Connecticut 's B ra dl ey International Airport or Baltimore's BWI, for B altimore/ W ashington I nternational Airport ; however, the latter also serves Washington, D.C. , alongside Dulles International Airport (IAD, for I nternational A irport D ulles) and Ronald Reagan Washington National Airport (DCA, for D istrict of C olumbia A irport). The code also sometimes comes from

6958-433: The nearby Shizu mountain is said to be the exact birthplace of the Yellow Emperor. The Zhengzhou Dragon realization company began construction at the turn of the 21st century of a large concrete dragon that would straddle the mountain. A giant dragon was being constructed by private investors near the city out of concrete and marble with a 29.9m tall head and a body that would have stretched 21 km (13 mi) along

7056-551: The next 1,500 years. Populations began to rise after 3500 BC, with further dips and rises occurring between 3000 and 2500 BC but varying in date between regions. Around this time is the Neolithic decline , when populations collapsed across most of Europe, possibly caused by climatic conditions, plague, or mass migration. Settled life, encompassing the transition from foraging to farming and pastoralism, began in South Asia in

7154-440: The next two thousand years, but in some parts of Northwest Europe it is much later, lasting just under 3,000 years from c. 4500 BC–1700 BC. Recent advances in archaeogenetics have confirmed that the spread of agriculture from the Middle East to Europe was strongly correlated with the migration of early farmers from Anatolia about 9,000 years ago, and was not just a cultural exchange. Anthropomorphic figurines have been found in

7252-416: The one they are located in: Other airport codes are of obscure origin, and each has its own peculiarities: In Asia, codes that do not correspond with their city's names include Niigata 's KIJ , Nanchang 's KHN and Pyongyang 's FNJ . EuroAirport Basel Mulhouse Freiburg , which serves three countries, has three airport codes: BSL, MLH, EAP. Some cities have a name in their respective language which

7350-536: The preceding period. The Formative stage is equivalent to the Neolithic Revolution period in Europe, Asia, and Africa. In the southwestern United States it occurred from 500 to 1200 AD when there was a dramatic increase in population and development of large villages supported by agriculture based on dryland farming of corn (maize), and later, beans, squash, and domesticated turkeys. During this period

7448-454: The predominant way of life, the sensitivity to these shortages could be particularly acute, affecting agrarian populations to an extent that otherwise may not have been routinely experienced by prior hunter-gatherer communities. Nevertheless, agrarian communities generally proved successful, and their growth and the expansion of territory under cultivation continued. Another significant change undergone by many of these newly agrarian communities

7546-417: The previous megalithic temples. It is presumed the population arrived from Sicily because of the similarity of Maltese dolmens to some small constructions found there. With some exceptions, population levels rose rapidly at the beginning of the Neolithic until they reached the carrying capacity . This was followed by a population crash of "enormous magnitude" after 5000 BC, with levels remaining low during

7644-496: The previous reliance on an essentially nomadic hunter-gatherer subsistence technique or pastoral transhumance was at first supplemented, and then increasingly replaced by, a reliance upon the foods produced from cultivated lands. These developments are also believed to have greatly encouraged the growth of settlements, since it may be supposed that the increased need to spend more time and labor in tending crop fields required more localized dwellings. This trend would continue into

7742-422: The region of Balochistan , Pakistan, around 7,000 BC. At the site of Mehrgarh , Balochistan, presence can be documented of the domestication of wheat and barley, rapidly followed by that of goats, sheep, and cattle. In April 2006, it was announced in the scientific journal Nature that the oldest (and first Early Neolithic ) evidence for the drilling of teeth in vivo (using bow drills and flint tips)

7840-477: The ridge line of Shizu Mountain. The hollow body of the dragon was slated to be 9m high and 6m wide and would have contained a light rail system along with facilities for sight seeing and leisure, such as shops, restaurants and luxury clubs. The project was expected to be completed before October 1, 2009, to celebrate the 60th anniversary of the founding of the People's Republic of China. However, lack of funding, and

7938-692: The rise of metallurgy, and most Neolithic societies on the whole were relatively simple and egalitarian. Beyond Eurasia, however, states were formed during the local Neolithic in three areas, namely in the Preceramic Andes with the Caral-Supe Civilization , Formative Mesoamerica and Ancient Hawaiʻi . However, most Neolithic societies were noticeably more hierarchical than the Upper Paleolithic cultures that preceded them and hunter-gatherer cultures in general. The domestication of large animals (c. 8000 BC) resulted in

8036-771: The roof, with ladders positioned both on the inside and outside of the houses. Stilt-house settlements were common in the Alpine and Pianura Padana ( Terramare ) region. Remains have been found in the Ljubljana Marsh in Slovenia and at the Mondsee and Attersee lakes in Upper Austria , for example. A significant and far-reaching shift in human subsistence and lifestyle was to be brought about in areas where crop farming and cultivation were first developed:

8134-506: The same first and middle letters, indicating that this rule might be followed only in Germany. Many cities retain historical names in their airport codes, even after having undergone an official name/spelling/transliteration change: Some airport codes are based on previous names associated with a present airport, often with a military heritage. These include: Some airports are named for an administrative division or nearby city, rather than

8232-456: The same local company, with a starting fare of 6 renminbi . Xinzheng is well connected to Zhengzhou and points south by China National Highway 107 . All inter-city roads are well maintained. Within the city limits, as in the rest of many small Chinese cities, many residential roads remain in a serious state of disrepair. Neolithic The Neolithic or New Stone Age (from Greek νέος néos 'new' and λίθος líthos 'stone')

8330-564: The seat of government for the Qin dynasty , from about 221 BCE, which is considered the beginning of a unified China. The word qin ( 秦 ), which is pronounced similar to "chin", is thought to be the basis for the word "China." Historically, this prefecture was an integrated part of Zhengzhou. However, in 1994, the Henan Provincial Council authorized the incorporation of Xinzheng into a separate municipality. As 2012, this city

8428-500: The station code of Malton, Mississauga , where it is located). YUL is used for Montréal–Trudeau (UL was the ID code for the beacon in the city of Kirkland , now the location of Montréal–Trudeau). While these codes make it difficult for the public to associate them with a particular Canadian city, some codes have become popular in usage despite their cryptic nature, particularly at the largest airports. Toronto's code has entered pop culture in

8526-445: The students have sprung out around the universities in abundance. At Sias, the administration tacitly allows students to live off campus, creating a large community of landlords around the university. The presence of 40,000 students has had an undeniable and long lasting impact on the community. Due to limited accommodation, lack of infrastructure, pollution and other factors, tourism has been slow to take off in Xinzheng. Every Spring,

8624-568: The two-letter code of the radio beacons that were the closest to the actual airport, such as YQX in Gander or YXS in Prince George . Four of the ten provincial capital airports in Canada have ended up with codes beginning with YY, including: Canada's largest airport is YYZ for Toronto Pearson (as YTZ was already allocated to Billy Bishop Toronto City Airport , the airport was given

8722-529: The use of two letters allowed only a few hundred combinations; a three-letter system of airport codes was implemented. This system allowed for 17,576 permutations, assuming all letters can be used in conjunction with each other. Since the U.S. Navy reserved "N" codes, and to prevent confusion with Federal Communications Commission broadcast call signs , which begin with "W" or "K", the airports of certain U.S. cities whose name begins with one of these letters had to adopt "irregular" airport codes: This practice

8820-580: The vicinity, and may be the oldest known human-made place of worship. At least seven stone circles, covering 25 acres (10 ha), contain limestone pillars carved with animals, insects, and birds. Stone tools were used by perhaps as many as hundreds of people to create the pillars, which might have supported roofs. Other early PPNA sites dating to around 9500–9000 BC have been found in Palestine , notably in Tell es-Sultan (ancient Jericho ) and Gilgal in

8918-478: The world, such as Africa , South Asia and Southeast Asia , independent domestication events led to their own regionally distinctive Neolithic cultures, which arose completely independently of those in Europe and Southwest Asia . Early Japanese societies and other East Asian cultures used pottery before developing agriculture. In the Middle East , cultures identified as Neolithic began appearing in

9016-419: Was adopted in site by these hunter-gatherers and not spread by demic diffusion into the region. The Neolithic 1 (PPNA) period began around 10,000 BC in the Levant . A temple area in southeastern Turkey at Göbekli Tepe , dated to around 9500 BC, may be regarded as the beginning of the period. This site was developed by nomadic hunter-gatherer tribes, as evidenced by the lack of permanent housing in

9114-572: Was coined by Sir John Lubbock in 1865 as a refinement of the three-age system . The Neolithic began about 12,000 years ago, when farming appeared in the Epipalaeolithic Near East and Mesopotamia , and later in other parts of the world. It lasted in the Near East until the transitional period of the Chalcolithic (Copper Age) from about 6,500 years ago (4500 BC), marked by the development of metallurgy , leading up to

9212-869: Was found in Mehrgarh. In South India, the Neolithic began by 6500 BC and lasted until around 1400 BC when the Megalithic transition period began. South Indian Neolithic is characterized by Ash mounds from 2500 BC in Karnataka region, expanded later to Tamil Nadu . In East Asia, the earliest sites include the Nanzhuangtou culture around 9500–9000 BC, Pengtoushan culture around 7500–6100 BC, and Peiligang culture around 7000–5000 BC. The prehistoric Beifudi site near Yixian in Hebei Province, China, contains relics of

9310-409: Was found in the outskirts of Amman , Jordan . Considered to be one of the largest prehistoric settlements in the Near East , it was continuously inhabited from approximately 7250 BC to approximately 5000 BC. Settlements have rectangular mud-brick houses where the family lived together in single or multiple rooms. Burial findings suggest an ancestor cult where people preserved skulls of

9408-455: Was ground into flour. Emmer wheat was domesticated, and animals were herded and domesticated ( animal husbandry and selective breeding ). In 2006, remains of figs were discovered in a house in Jericho dated to 9400 BC. The figs are of a mutant variety that cannot be pollinated by insects, and therefore the trees can only reproduce from cuttings. This evidence suggests that figs were

9506-431: Was limited to a narrow range of plants, both wild and domesticated, which included einkorn wheat , millet and spelt , and the keeping of dogs . By about 8000 BC, it included domesticated sheep and goats , cattle and pigs . Not all of these cultural elements characteristic of the Neolithic appeared everywhere in the same order: the earliest farming societies in the Near East did not use pottery. In other parts of

9604-402: Was one of diet . Pre-agrarian diets varied by region, season, available local plant and animal resources and degree of pastoralism and hunting. Post-agrarian diet was restricted to a limited package of successfully cultivated cereal grains, plants and to a variable extent domesticated animals and animal products. Supplementation of diet by hunting and gathering was to variable degrees precluded by

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