Au (mobile phone company)
Au, or au by KDDI, is a brand marketed by KDDI in the main islands of Japan and by Okinawa Cellular in Okinawa for their mobile cellular services. According to the brand creator, the name'au' is based on the Japanese verbs for'meet' and'unite'. However, KDDI explains that au comes from two letters which stand for few words.'A' is for access and amenity, and'U' is for unique and user. There is a phrase,'access to u' that goes along the brand name; the network that would become Au was set up as two networks: DDI and IDO. IDO's network was based upon the NTT Hi-cap analog cellular system, began operations in December 1988 in the Kanto and Tokai regions. DDI's network was run by independent phone companies, began service in 1989 using the TACS system elsewhere in Japan. Nippon Idou Tsushin was owned by Toyota. Au K. K. was established in November 2000 by the Kyocera companies as part of the DDI Cellular network. In 2001, the company was merged into KDDI, but its brand name was retained and applied to all mobile phone service under KDDI group.
Au established a nationwide 3G network in 2003, replacing its previous cdmaOne service with CDMA 1X WIN service. Au started selling the iPhone 4S from 14 October 2011. Au launched LTE service as'Au 4G LTE' in September 2012. EZweb: A service which provides various features for mobile phone users, including e-mail, web browsing and video sharing, video conferencing, access to location-based services and games; the service runs on traditional cdmaOne mobile phone networks at a data rate of 64 kbit/s or on the new 1xEV-DO Rev A network with up to 3.1 Mbit/s downstream and 1.8 Mbit/s upstream bandwidth. In spring 2004, au became the first cellular phone based data service provider to offer an unlimited use flat-rate plan in Japan. EZweb@mail: Multimedia messaging service. C-mail: Short Message Service EZchakuuta: A service which allows users to use song segments 30 seconds or less, as ring tones. Chakuuta's rights are held by Sony Music Entertainment Japan. Chaku Uta Full: A service distributing full length songs over the mobile network.
The selection offered is pop music. The coding format is 48 kbit/s HE-AAC; the size of one piece of music is about 1.5 MiB. Downloaded content is secured on a memory card plugged into the mobile. Chaku-Uta Full is the trademark of Sony Music Entertainment Japan. EZappli: BREW applications. EZmovie: Movie player. EZchannel EZ Machi Uta: A service that allows users to customize their ringback tones with music, etc. EZnavigation: A service, a component of EZWeb and allows GPS-enabled handsets to plot their position. EZnaviwalk: Gives scrolling audio navigation to guide you to your destination. Displays restaurant and weather information for the area. EZnewsflash: Using BCMCS technology. PC Site Viewer LISMO: au Listen Mobile Service.. Global Passport: Global roaming service, the first AU handset requiring a "SIM card". Global Expert: Successor to above EZ FeliCa: Osaifu-Keitai, a payment system. EZ television: An EZappli when watching analog terrestrial broadcasting. Ended on 24 July 2011 in most areas and on 31 March 2012 in Iwate and Fukushima prefectures.
EZ television 1seg: Supports 1seg digital terrestrial broadcasting for phones and mobile devices. Supports data broadcasts. EZ television 1seg does not support analog television. Au 4G LTE: FDD-LTE service. Official website
Indonesia the Republic of Indonesia, is a country in Southeast Asia, between the Indian and Pacific oceans. It is the world's largest island country, with more than seventeen thousand islands, at 1,904,569 square kilometres, the 14th largest by land area and the 7th largest in combined sea and land area. With over 261 million people, it is the world's 4th most populous country as well as the most populous Muslim-majority country. Java, the world's most populous island, is home to more than half of the country's population; the sovereign state is a constitutional republic with an elected parliament. It has 34 provinces. Jakarta, the country's capital, is the second most populous urban area in the world; the country shares land borders with Papua New Guinea, East Timor, the eastern part of Malaysia. Other neighbouring countries include Singapore, the Philippines, Australia and India's Andaman and Nicobar Islands. Despite its large population and densely populated regions, Indonesia has vast areas of wilderness that support a high level of biodiversity.
The country has abundant natural resources like oil and natural gas, tin and gold. Agriculture produces rice, palm oil, coffee, medicinal plants and rubber. Indonesia's major trading partners are China, United States, Japan and India. History of the Indonesian archipelago has been influenced by foreign powers drawn to its natural resources, it has been an important region for trade since at least the 7th century, when Srivijaya and later Majapahit traded with entities from mainland China and the Indian subcontinent. Local rulers absorbed foreign cultural and political models from the early centuries and Hindu and Buddhist kingdoms flourished. Muslim traders and Sufi scholars brought Islam, while European powers brought Christianity and fought one another to monopolise trade in the Spice Islands of Maluku during the Age of Discovery. Although sometimes interrupted by the Portuguese and British, the Dutch were the foremost European power for much of its 350-year presence in the archipelago. In early 20th century, the concept of "Indonesia" as a nation state emerged, independence movements began to take shape.
During the decolonisation of Asia after World War II, Indonesia achieved independence in 1949 following an armed and diplomatic conflict with the Netherlands. Indonesia consists of hundreds of distinct native ethnic and linguistic groups, with the largest—and politically dominant—ethnic group being the Javanese. A shared identity has developed, defined by a national language, ethnic diversity, religious pluralism within a Muslim-majority population, a history of colonialism and rebellion against it. Indonesia's national motto, "Bhinneka Tunggal Ika", articulates the diversity that shapes the country. Indonesia's economy is the world's 16th largest by nominal GDP and the 7th largest by GDP at PPP. Indonesia is a member of several multilateral organisations, including the UN, WTO, IMF and G20, it is a founding member of Non-Aligned Movement, Association of Southeast Asian Nations, Asia-Pacific Economic Cooperation, East Asia Summit, Asian Infrastructure Investment Bank and Organisation of Islamic Cooperation.
The name Indonesia derives from the Greek name of the Indos and the word nesos, meaning "Indian islands". The name dates to the 18th century, far predating the formation of independent Indonesia. In 1850, George Windsor Earl, an English ethnologist, proposed the terms Indunesians—and, his preference, Malayunesians—for the inhabitants of the "Indian Archipelago or Malayan Archipelago". In the same publication, one of his students, James Richardson Logan, used Indonesia as a synonym for Indian Archipelago. However, Dutch academics writing in East Indies publications were reluctant to use Indonesia. After 1900, Indonesia became more common in academic circles outside the Netherlands, native nationalist groups adopted it for political expression. Adolf Bastian, of the University of Berlin, popularised the name through his book Indonesien oder die Inseln des Malayischen Archipels, 1884–1894; the first native scholar to use the name was Ki Hajar Dewantara, when in 1913 he established a press bureau in the Netherlands, Indonesisch Pers-bureau.
Fossils and the remains of tools show that the Indonesian archipelago was inhabited by Homo erectus, known as "Java Man", between 1.5 million years ago and 35,000 years ago. Homo sapiens reached the region around 45,000 years ago. Austronesian peoples, who form the majority of the modern population, migrated to Southeast Asia from what is now Taiwan, they arrived around 4,000 years ago, as they spread through the archipelago, confined the indigenous Melanesians to the far eastern regions. Ideal agricultural conditions and the mastering of wet-field rice cultivation as early as the 8th century BCE allowed villages and small kingdoms to flourish by the first century CE; the archipelago's strategic sea-lane position fostered inter-island and international trade, including links with Indian kingdoms and Chinese dynasties, which were established several centuries BCE. Trade has since fundamentally shaped Indonesian history. From the 7th century CE, the powerful Srivijaya naval kingdom flourished as a result of trade and the influences of Hinduism and Buddhism that were imported with it.
Between the 8th and 10th century CE, the agricultural Buddhist Saile
KRL Commuterline, or known as KRL Jabodetabek by Indonesians, is a commuter rail system for Greater Jakarta in Indonesia. It is operated by PT Kereta Commuter Indonesia, a subsidiary of the Indonesian national railway company PT Kereta Api Indonesia; the name of the operator changed from previous PT KCJ since 19 September 2017. The current rolling stock consists of used Japanese trains from Tokyo Metro, Toyo Rapid, JR East and local-produced trains from Industri Kereta Api; the rail system uses metro/rapid transit rolling stock standard and operates at high frequency with a minimum headway of five minutes. As of June 2018, the average number of KRL users per day reaches 1,001,438 users on weekdays, with a record of the highest number of users served in one day is 1,154,080; the number is targeted to reach 1.2 million passengers per day by 2019. In 1917, a plan to introduce electrified railway in Batavia was made by Staatspoorwegen, Dutch colonial railways company; the railway between Tanjung Priok to Meester Cornelis was the first line to be electrified.
The construction began in 1923 and completed on 24 December 1924. The line was opened on 6 April 1925—in time for the SS 50th anniversary—with 3000-series locomotives from SLM–BBC, 3100-series electric locomotives from AEG Germany, 3200-series locomotives from Werkspoor Netherlands and passenger coaches from Westinghouse and General Electric; the electrification project continued and on 1 May 1927, all rail lines that surround Batavia has been electrified. Batavia Zuid station, closed temporarily in 1926, was reopened on 8 October 1929; the last part of the electrification project, Batavia Zuid - Buitenzorg, was completed in 1930. After independence in 1945, the railway operation was taken over by DKA. Transportation in Jakarta was at its lowest point during the 1960s. Tramways in Jakarta were closed in 1960 and in November 1966, railway traffic on Manggarai – Jakarta Kota was restricted; the electric train services were closed in late 1965. Electric service was revived in 1972. On 16 May 1972, PNKA ordered 10 new sets of electric multiple units from Japan.
The new trains, built by Nippon Sharyo, arrived in 1976 and replaced the old locomotives and coaches. Sets consisted with capacity of 134 passengers per car; those new trains will continue serving the passengers in Jakarta for the next 37 years. PNKA continued importing trains from South Korea and Netherlands until the late 1990s. In May 2000 the government of Japan via JICA and Tokyo Metropolitan Government donated 72 units of used Toei 6000 trains operating on Toei Mita Line; these were the first air-conditioned electric train in Indonesia. The new trains were operated on 25 August 2000 for express services; the current form of electric train service in Jakarta was begun in 2008. Jabodetabek Division, a sub-unit of Kereta Api Indonesia that handles commuter service around Jabodetabek, spun-off to form KAI Commuterline Jabodetabek. Ticket revenues, rolling stock maintenance, station management was transferred to the newly formed subsidiary, but all operational matters, rolling stock and infrastructures remained under KAI's responsibility.
The modernization of the commuter railway system, did not begin until 2011. In 2011, the number of lines were reduced from 37 point-to-point routes to six integrated lines, express services were removed, the service were simplified into two service classes: economy class and Commuter class, both stops at every station. On 17 April 2013, the commuter line extension to Maja in the Green Line commenced operation. On July 25, 2013, the economy class was discontinued, leaving the Commuter class as the sole service class throughout the network. In July 2013, the operator introduced the Commet system replacing the old paper ticket system and changing the old fare system into'progressive fare' system, as well as modernization of all 80 serving stations. Starting on April 1, 2015, the Nambo line extension operation is commenced. Three line extensions have been opened between 2015 and 2017: the extension of Pink Line to Tanjung Priok station which commenced operation on December 22, 2015, the extension of Green Line to Rangkasbitung station which commenced operation on April 1, 2017, the extension of Blue Line to Cikarang station which commenced operation on October 8, 2017.
In July 2015, KA Commuter Jabodetabek served more than 850,000 passengers per day, triple the 2011 figures, but still less than 3.5% of all Jabodetabek commutes. Until March 5, 2014, KA Commuter Jabodetabek only operates 8-car trainsets on all lines. In 2016, the operation of 12-car trainsets commenced; as of 2018, it operates 926 trips per day by 26 trains with 12 cars each, 43 trains with 10 cars each and 22 trains with eight cars. The modernization project in 2011 introduced 6 integrated commuter lines and 8 services which serve Greater Jakarta; the number of services has increased to 11 by 2017. The network route map is recognized by color destination of final station. Passengers may purchase ticket for multiple journeys. Single-journey cards may be purchased at any ticket counters or C-VIM vending machines, available in some stations. A Rp 10,000 deposit will be levied on top of the fare t
Thailand the Kingdom of Thailand and known as Siam, is a country at the centre of the Southeast Asian Indochinese peninsula composed of 76 provinces. At 513,120 km2 and over 68 million people, Thailand is the world's 50th largest country by total area and the 21st-most-populous country; the capital and largest city is a special administrative area. Thailand is bordered to the north by Myanmar and Laos, to the east by Laos and Cambodia, to the south by the Gulf of Thailand and Malaysia, to the west by the Andaman Sea and the southern extremity of Myanmar, its maritime boundaries include Vietnam in the Gulf of Thailand to the southeast, Indonesia and India on the Andaman Sea to the southwest. Although nominally a constitutional monarchy and parliamentary democracy, the most recent coup in 2014 established a de facto military dictatorship. Tai peoples migrated from southwestern China to mainland Southeast Asia from the 11th century. Various Indianised kingdoms such as the Mon, the Khmer Empire and Malay states ruled the region, competing with Thai states such as Ngoenyang, the Sukhothai Kingdom, Lan Na and the Ayutthaya Kingdom, which rivaled each other.
European contact began in 1511 with a Portuguese diplomatic mission to Ayutthaya, one of the great powers in the region. Ayutthaya reached its peak during cosmopolitan Narai's reign declining thereafter until being destroyed in 1767 in a war with Burma. Taksin reunified the fragmented territory and established the short-lived Thonburi Kingdom, he was succeeded in 1782 by Buddha Yodfa Chulaloke, the first monarch of the Chakri dynasty and founder of the Rattanakosin Kingdom, which lasted into the early 20th century. Through the 18th and 19th centuries, Siam faced pressure from France and the United Kingdom, including forced concessions of territory, but it remained the only Southeast Asian country to avoid direct Western rule. Following a bloodless revolution in 1932, Siam became a constitutional monarchy and changed its official name to "Thailand". While it joined the Allies in World War I, Thailand was an Axis satellite in World War II. In the late 1950s, a military coup revived the monarchy's influential role in politics.
Thailand became a major ally of the United States and played a key anti-communist role in the region. Apart from a brief period of parliamentary democracy in the mid-1970s, Thailand has periodically alternated between democracy and military rule. In the 21st century, Thailand endured a political crisis that culminated in two coups and the establishment of its current and 20th constitution by the military junta. Thailand is a unitary parliamentary constitutional monarchy under a military junta. Thailand is a founding member of Association of Southeast Asian Nations and remains a major ally of the US. Despite its comparatively sporadic changes in leadership, it is considered a regional power in Southeast Asia and a middle power in global affairs. With a high level of human development, the second largest economy in Southeast Asia, the 20th largest by PPP, Thailand is classified as a newly industrialized economy. Thailand the Kingdom of Thailand known as Siam, is a country at the centre of the Indochinese peninsula in Southeast Asia.
The country has always been called Mueang Thai by its citizens. By outsiders prior to 1949, it was known by the exonym Siam; the word Siam may have originated from Pali or Sanskrit श्याम or Mon ရာမည. The names Shan and A-hom seem to be variants of the same word; the word Śyâma is not its origin, but a learned and artificial distortion. Another theory is the name derives from Chinese: "Ayutthaya emerged as a dominant centre in the late fourteenth century; the Chinese called this region Xian, which the Portuguese converted into Siam." A further possibility is that Mon-speaking peoples migrating south called themselves'syem' as do the autochthonous Mon-Khmer-speaking inhabitants of the Malay Peninsula. The signature of King Mongkut reads SPPM Mongkut Rex Siamensium, giving the name "Siam" official status until 24 June 1939 when it was changed to Thailand. Thailand was renamed to Siam from 1946 to 1948. According to George Cœdès, the word Thai means "free man" in the Thai language, "differentiating the Thai from the natives encompassed in Thai society as serfs".
A famous Thai scholar argued that Thai means "people" or "human being", since his investigation shows that in some rural areas the word "Thai" was used instead of the usual Thai word "khon" for people. According to Michel Ferlus, the ethnonyms Thai/Tai would have evolved from the etymon *kri:'human being' through the following chain: *kəri: > *kəli: > *kədi:/*kədaj > *di:/*daj > *dajA > tʰajA2 or > tajA2. Michel Ferlus' work is based on some simple rules of phonetic change observable in the Sinosphere and studied for t
China the People's Republic of China, is a country in East Asia and the world's most populous country, with a population of around 1.404 billion. Covering 9,600,000 square kilometers, it is the third- or fourth-largest country by total area. Governed by the Communist Party of China, the state exercises jurisdiction over 22 provinces, five autonomous regions, four direct-controlled municipalities, the special administrative regions of Hong Kong and Macau. China emerged as one of the world's earliest civilizations, in the fertile basin of the Yellow River in the North China Plain. For millennia, China's political system was based on hereditary monarchies, or dynasties, beginning with the semi-legendary Xia dynasty in 21st century BCE. Since China has expanded, re-unified numerous times. In the 3rd century BCE, the Qin established the first Chinese empire; the succeeding Han dynasty, which ruled from 206 BC until 220 AD, saw some of the most advanced technology at that time, including papermaking and the compass, along with agricultural and medical improvements.
The invention of gunpowder and movable type in the Tang dynasty and Northern Song completed the Four Great Inventions. Tang culture spread in Asia, as the new Silk Route brought traders to as far as Mesopotamia and Horn of Africa. Dynastic rule ended in 1912 with the Xinhai Revolution; the Chinese Civil War resulted in a division of territory in 1949, when the Communist Party of China established the People's Republic of China, a unitary one-party sovereign state on Mainland China, while the Kuomintang-led government retreated to the island of Taiwan. The political status of Taiwan remains disputed. Since the introduction of economic reforms in 1978, China's economy has been one of the world's fastest-growing with annual growth rates above 6 percent. According to the World Bank, China's GDP grew from $150 billion in 1978 to $12.24 trillion by 2017. Since 2010, China has been the world's second-largest economy by nominal GDP and since 2014, the largest economy in the world by purchasing power parity.
China is the world's largest exporter and second-largest importer of goods. China is a recognized nuclear weapons state and has the world's largest standing army and second-largest defense budget; the PRC is a permanent member of the United Nations Security Council as it replaced the ROC in 1971, as well as an active global partner of ASEAN Plus mechanism. China is a leading member of numerous formal and informal multilateral organizations, including the Shanghai Cooperation Organization, WTO, APEC, BRICS, the BCIM, the G20. In recent times, scholars have argued that it will soon be a world superpower, rivaling the United States; the word "China" has been used in English since the 16th century. It is not a word used by the Chinese themselves, it has been traced through Portuguese and Persian back to the Sanskrit word Cīna, used in ancient India."China" appears in Richard Eden's 1555 translation of the 1516 journal of the Portuguese explorer Duarte Barbosa. Barbosa's usage was derived from Persian Chīn, in turn derived from Sanskrit Cīna.
Cīna was first used including the Mahābhārata and the Laws of Manu. In 1655, Martino Martini suggested that the word China is derived from the name of the Qin dynasty. Although this derivation is still given in various sources, it is complicated by the fact that the Sanskrit word appears in pre-Qin literature; the word may have referred to a state such as Yelang. The meaning transferred to China as a whole; the origin of the Sanskrit word is still a matter of debate, according to the Oxford English Dictionary. The official name of the modern state is the "People's Republic of China"; the shorter form is "China" Zhōngguó, from zhōng and guó, a term which developed under the Western Zhou dynasty in reference to its royal demesne. It was applied to the area around Luoyi during the Eastern Zhou and to China's Central Plain before being used as an occasional synonym for the state under the Qing, it was used as a cultural concept to distinguish the Huaxia people from perceived "barbarians". The name Zhongguo is translated as "Middle Kingdom" in English.
Archaeological evidence suggests that early hominids inhabited China between 2.24 million and 250,000 years ago. The hominid fossils of Peking Man, a Homo erectus who used fire, were discovered in a cave at Zhoukoudian near Beijing; the fossilized teeth of Homo sapiens have been discovered in Fuyan Cave in Hunan. Chinese proto-writing existed in Jiahu around 7000 BCE, Damaidi around 6000 BCE, Dadiwan from 5800–5400 BCE, Banpo dating from the 5th millennium BCE; some scholars have suggested. According to Chinese tradition, the first dynasty was the Xia, which emerged around 2100 BCE; the dynasty was considered mythical by historians until scientific excavations found early Bronze Age sites at Erlitou, Henan in 1959. It remains unclear whether these sites are the remains of the Xia dynasty or of another culture from the same period; the succeeding Shang dynasty is the earliest to be confirmed by contemporary records. The Shang ruled the plain of the Yellow River in eastern China from the 17th to the 11th century BCE.
Their oracle bone script
In cryptography, encryption is the process of encoding a message or information in such a way that only authorized parties can access it and those who are not authorized cannot. Encryption does not itself prevent interference, but denies the intelligible content to a would-be interceptor. In an encryption scheme, the intended information or message, referred to as plaintext, is encrypted using an encryption algorithm – a cipher – generating ciphertext that can be read only if decrypted. For technical reasons, an encryption scheme uses a pseudo-random encryption key generated by an algorithm, it is in principle possible to decrypt the message without possessing the key, for a well-designed encryption scheme, considerable computational resources and skills are required. An authorized recipient can decrypt the message with the key provided by the originator to recipients but not to unauthorized users. In symmetric-key schemes, the encryption and decryption keys are the same. Communicating parties must have the same key.
An example of a symmetric key scheme would be the one used by the German Enigma Machine that sent information from a central location to troops in various other locations in secret. When the Allies captured one of these machines and figured out how it worked, they were able to decipher the information encoded within the messages as soon as they could discover the encryption key for a given day's transmissions. In public-key encryption schemes, the encryption key is published for anyone to use and encrypt messages. However, only the receiving party has access to the decryption key. Public-key encryption was first described in a secret document in 1973. Although published subsequently, the work of Diffie and Hellman, was published in a journal with a large readership, the value of the methodology was explicitly described and the method became known as the Diffie Hellman key exchange. A publicly available public key encryption application called Pretty Good Privacy was written in 1991 by Phil Zimmermann, distributed free of charge with source code.
Encryption has long been used by governments to facilitate secret communication. It is now used in protecting information within many kinds of civilian systems. For example, the Computer Security Institute reported that in 2007, 71% of companies surveyed utilized encryption for some of their data in transit, 53% utilized encryption for some of their data in storage. Encryption can be used to protect data "at rest", such as information stored on computers and storage devices. In recent years, there have been numerous reports of confidential data, such as customers' personal records, being exposed through loss or theft of laptops or backup drives. Digital rights management systems, which prevent unauthorized use or reproduction of copyrighted material and protect software against reverse engineering, is another somewhat different example of using encryption on data at rest. In response to encryption of data at rest, cyber-adversaries have developed new types of attacks; these more recent threats to encryption of data at rest include cryptographic attacks, stolen ciphertext attacks, attacks on encryption keys, insider attacks, data corruption or integrity attacks, data destruction attacks, ransomware attacks.
Data fragmentation and active defense data protection technologies attempt to counter some of these attacks, by distributing, moving, or mutating ciphertext so it is more difficult to identify, corrupt, or destroy. Encryption is used to protect data in transit, for example data being transferred via networks, mobile telephones, wireless microphones, wireless intercom systems, Bluetooth devices and bank automatic teller machines. There have been numerous reports of data in transit being intercepted in recent years. Data should be encrypted when transmitted across networks in order to protect against eavesdropping of network traffic by unauthorized users. Encryption, by itself, can protect the confidentiality of messages, but other techniques are still needed to protect the integrity and authenticity of a message. Standards for cryptographic software and hardware to perform encryption are available, but using encryption to ensure security may be a challenging problem. A single error in system design or execution can allow successful attacks.
Sometimes an adversary can obtain unencrypted information without directly undoing the encryption. See, e.g. traffic analysis, TEMPEST, or Trojan horse. Digital signature and encryption must be applied to the ciphertext when it is created to avoid tampering. Encrypting at the time of creation is only secure if the encryption device itself has not been tampered with. Conventional methods for deleting data permanently from a storage device involve overwriting its whole content with zeros, ones or other patterns – a process which can take a significant amount of time, depending on the capacity and the type of the medium. Cryptography offers a way of making the erasure instantaneous; this method is called crypto-shredding. An example implementation of this method can be found on iOS devices, where the cryptographic key is kept in a dedicated'Effaceable Storage'; because the
Bangkok is the capital and most populous city of Thailand. It is known in Thai as Krung Thep Maha Nakhon or Krung Thep; the city occupies 1,568.7 square kilometres in the Chao Phraya River delta in central Thailand, has a population of over eight million, or 12.6 percent of the country's population. Over fourteen million people lived within the surrounding Bangkok Metropolitan Region at the 2010 census, making Bangkok the nation's primate city dwarfing Thailand's other urban centres in terms of importance. Bangkok traces its roots to a small trading post during the Ayutthaya Kingdom in the 15th century, which grew and became the site of two capital cities: Thonburi in 1768 and Rattanakosin in 1782. Bangkok was at the heart of the modernization of Siam renamed Thailand, during the late-19th century, as the country faced pressures from the West; the city was at the centre of Thailand's political struggles throughout the 20th century, as the country abolished absolute monarchy, adopted constitutional rule, underwent numerous coups and several uprisings.
The city grew during the 1960s through the 1980s and now exerts a significant impact on Thailand's politics, education and modern society. The Asian investment boom in the 1980s and 1990s led many multinational corporations to locate their regional headquarters in Bangkok; the city is now a regional force in business. It is an international hub for transport and health care, has emerged as a centre for the arts and entertainment; the city is known for cultural landmarks, as well as its red-light districts. The Grand Palace and Buddhist temples including Wat Arun and Wat Pho stand in contrast with other tourist attractions such as the nightlife scenes of Khaosan Road and Patpong. Bangkok is among the world's top tourist destinations, has been named the world's most visited city in several rankings. Bangkok's rapid growth coupled with little urban planning has resulted in a haphazard cityscape and inadequate infrastructure. An inadequate road network, despite an extensive expressway network, together with substantial private car usage, have led to chronic and crippling traffic congestion, which caused severe air pollution in the 1990s.
The city has since turned to public transport in an attempt to solve the problem. Five rapid transit lines are now in operation, with more systems under construction or planned by the national government and the Bangkok Metropolitan Administration; the history of Bangkok dates at least back to the early 15th century, when it was a village on the west bank of the Chao Phraya River, under the rule of Ayutthaya. Because of its strategic location near the mouth of the river, the town increased in importance. Bangkok served as a customs outpost with forts on both sides of the river, was the site of a siege in 1688 in which the French were expelled from Siam. After the fall of Ayutthaya to the Burmese Empire in 1767, the newly crowned King Taksin established his capital at the town, which became the base of the Thonburi Kingdom. In 1782, King Phutthayotfa Chulalok succeeded Taksin, moved the capital to the eastern bank's Rattanakosin Island, thus founding the Rattanakosin Kingdom; the City Pillar was erected on 21 April 1782, regarded as the date of foundation of the present city.
Bangkok's economy expanded through international trade, first with China with Western merchants returning in the early to-mid 19th century. As the capital, Bangkok was the centre of Siam's modernization as it faced pressure from Western powers in the late-19th century; the reigns of Kings Mongkut and Chulalongkorn saw the introduction of the steam engine, printing press, rail transport and utilities infrastructure in the city, as well as formal education and healthcare. Bangkok became the centre stage for power struggles between the military and political elite as the country abolished absolute monarchy in 1932. Allied with Japan in World War II, it was subjected to Allied bombing, but grew in the post-war period as a result of US aid and government-sponsored investment. Bangkok's role as a US military R&R destination boosted its tourism industry as well as establishing it as a sex tourism destination. Disproportionate urban development led to increasing income inequalities and migration from rural areas into Bangkok.
Following the US withdrawal from Vietnam in 1973, Japanese businesses took over as leaders in investment, the expansion of export-oriented manufacturing led to growth of the financial market in Bangkok. Rapid growth of the city continued through the 1980s and early 1990s, until it was stalled by the 1997 Asian financial crisis. By many public and social issues had emerged, among them the strain on infrastructure reflected in the city's notorious traffic jams. Bangkok's role as the nation's political stage continues to be seen in strings of popular protests, from the student uprisings in 1973 and 1976, anti-military demonstrations in 1992, successive anti-government demonstrations by opposing groups from 2008 on. Administration of the city was first formalized by King Chulalongkorn in 1906, with the establishment of Monthon Krung Thep Phra Maha Nakhon as a national subdivision. In 1915 the monthon was split into several provinces, the administrative boundaries of which have since further changed.
The city in its current form was created in 1972 with the formation of the Bangkok Metropolitan Administration, following the merger of Phra Nakhon Province on the eastern bank of the Chao Phraya and Thonburi Province on the west during the previous year. The origin of th