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Brief about Vietnam OpenCourseWare Project

Vietnam

Vietnam (Vietnamese: Việt Nam), officially the Socialist Republic of Vietnam, is the easternmost nation on the Indochinese Peninsula. It borders China to the north, Laos to the northwest, and Cambodia to the southwest. On the country's east coast lies the South China Sea. With a population of over 85 million, Vietnam is the 13th most populous country in the world. The country is listed among the "Next Eleven" economies; according to government figures GDP, growth was 8.17% in 2006, the second fastest growth rate among countries in East Asia and the fastest in Southeast Asia.

Bach dang

Bach Dang Battle

History

Pre-dynastic era

The area now known as Vietnam has been inhabited since Paleolithic times, and some archaeological sites in Thanh Hoa Province reportedly date back several thousand years. Archaeologists link the beginnings of Vietnamese civilization to the late Neolithic, early Bronze Age, Phung-nguyen culture, which was centered in Vinh Phu Province of contemporary Vietnam from about 2000 to 1400 BCE. By about 1200 BCE, the development of wet-rice cultivation and bronze casting in the Ma River and Red River plains led to the development of the Dong Son culture, notable for its elaborate bronze drums. The bronze weapons, tools, and drums of Dongsonian sites show a Southeast Asian influence that indicates an indigenous origin for the bronze-casting technology. Many small, ancient copper mine sites have been found in northern Vietnam. Some of the similarities between the Dong Sonian sites and other Southeast Asian sites include the presence of boat-shaped coffins and burial jars, stilt dwellings, and evidence of the customs of betel-nut-chewing and teeth-blackening.

The legendary Hồng Bàng Dynasty of the Hùng kings is considered by many Vietnamese as the first Vietnamese state, known as Văn Lang. In 257 BCE, Thục Phán defeated the last Hùng king and consolidated the Lạc Việt tribes with his Âu Việt tribes, forming Âu Lạc and proclaiming himself An Dương Vương. In 207 BCE, a Chinese general named Zhao Tuo defeated An Dương Vương and consolidated Âu Lạc into Nanyue. In 111 BCE, the Chinese Han Dynasty consolidated Nanyue into their empire.

For the next thousand years, Vietnam was mostly under Chinese rule. Early independence movement such as those of the Trưng Sisters and of Lady Triệu were only briefly successful. It was independent as Vạn Xuân under the Anterior Ly Dynasty between 544 and 602. By the early 10th century, Vietnam had gained autonomy, but not independence, under the Khúc family.

Dynastic era

In 939 CE, a Vietnamese lord named Ngô Quyền defeated Chinese forces at the Bạch Đằng River and gained independence after 10 centuries under Chinese control. Renamed as Đại Việt, the nation went through a golden era during the Lý and Trần Dynasties. During the rule of the Trần Dynasty, Đại Việt repelled three Mongol invasions of Vietnam. Following the brief Hồ Dynasty, Vietnamese independence was briefly interrupted by the Chinese Ming Dynasty, but was restored by Lê Lợi, the founder of the Lê Dynasty. Feudalism in Vietnam reached its zenith in the Lê Dynasty of the 15th century, especially during the reign of Emperor Lê Thánh Tông. Between the 11th and 18th centuries, the Vietnamese expanded southward in a process known as nam tiến (southward expansion). They eventually conquered the kingdom of Champa and part of the Khmer Empire.

Questions & Answers

A golfer on a fairway is 70 m away from the green, which sits below the level of the fairway by 20 m. If the golfer hits the ball at an angle of 40° with an initial speed of 20 m/s, how close to the green does she come?
Aislinn Reply
cm
tijani
what is titration
John Reply
what is physics
Siyaka Reply
A mouse of mass 200 g falls 100 m down a vertical mine shaft and lands at the bottom with a speed of 8.0 m/s. During its fall, how much work is done on the mouse by air resistance
Jude Reply
Can you compute that for me. Ty
Jude
what is the dimension formula of energy?
David Reply
what is viscosity?
David
what is inorganic
emma Reply
what is chemistry
Youesf Reply
what is inorganic
emma
Chemistry is a branch of science that deals with the study of matter,it composition,it structure and the changes it undergoes
Adjei
please, I'm a physics student and I need help in physics
Adjanou
chemistry could also be understood like the sexual attraction/repulsion of the male and female elements. the reaction varies depending on the energy differences of each given gender. + masculine -female.
Pedro
A ball is thrown straight up.it passes a 2.0m high window 7.50 m off the ground on it path up and takes 1.30 s to go past the window.what was the ball initial velocity
Krampah Reply
2. A sled plus passenger with total mass 50 kg is pulled 20 m across the snow (0.20) at constant velocity by a force directed 25° above the horizontal. Calculate (a) the work of the applied force, (b) the work of friction, and (c) the total work.
Sahid Reply
you have been hired as an espert witness in a court case involving an automobile accident. the accident involved car A of mass 1500kg which crashed into stationary car B of mass 1100kg. the driver of car A applied his brakes 15 m before he skidded and crashed into car B. after the collision, car A s
Samuel Reply
can someone explain to me, an ignorant high school student, why the trend of the graph doesn't follow the fact that the higher frequency a sound wave is, the more power it is, hence, making me think the phons output would follow this general trend?
Joseph Reply
Nevermind i just realied that the graph is the phons output for a person with normal hearing and not just the phons output of the sound waves power, I should read the entire thing next time
Joseph
Follow up question, does anyone know where I can find a graph that accuretly depicts the actual relative "power" output of sound over its frequency instead of just humans hearing
Joseph
"Generation of electrical energy from sound energy | IEEE Conference Publication | IEEE Xplore" ***ieeexplore.ieee.org/document/7150687?reload=true
Ryan
what's motion
Maurice Reply
what are the types of wave
Maurice
answer
Magreth
progressive wave
Magreth
hello friend how are you
Muhammad Reply
fine, how about you?
Mohammed
hi
Mujahid
A string is 3.00 m long with a mass of 5.00 g. The string is held taut with a tension of 500.00 N applied to the string. A pulse is sent down the string. How long does it take the pulse to travel the 3.00 m of the string?
yasuo Reply
Who can show me the full solution in this problem?
Reofrir Reply
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Source:  OpenStax, Central eurasian tag. OpenStax CNX. Feb 08, 2009 Download for free at http://cnx.org/content/col10641/1.1
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