astronomy

Hoang Thi Than

Hoang Thi Than is a astronomy topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Hoang Thi Than rather than just read about it. In short: Hoàng Thị Thân (born in 1944 at Phú Cường (Thủ Dầu Một, South Viêt Nam)) is the first woman to graduate from the Department of Geological Engineering of Laval University (Quebec, Canada), the first female Vietnamese geological engineer and archeologist. She is also a boat person.

Key takeaways

Hoang Thi Than belongs to astronomy; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Hoang Thi Than to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Hoang Thi Than from memory before moving on to harder problems.

Reference excerpt

Hoàng Thị Thân (born in 1944 at Phú Cường (Thủ Dầu Một, South Viêt Nam)) is the first woman to graduate from the Department of Geological Engineering of Laval University (Quebec, Canada), the first female Vietnamese geological engineer and archeologist. She is also a boat person.

Biography

1950–1979 Her father was from Hai Duong (North Viet Nam), her mother from Nghệ An (Centre Viet Nam), Hoàng T. T grew up in Saigon (Ho Chi Minh City). She studied at the elementary school of Da Kao and at the high school of Gia Long (currently Nguyễn Thị Minh Khai), which are the all-women’s schools. In 1964, after getting High School Diploma I and High School Diploma II, she attended the first year of the politic-business college (Chính trị Kinh doanh), newly founded at the University of Đà Lạt (300 km northeast Saigon). In 1965, she got a scholarship granted by the Canadian government for Laval University (Quebec). Among different proposed matters (chemistry, electricity, geology, mechanic), she chose geology. However, there was only geological engineering at Laval University. She was the only woman in her class with 12 other young men. On top of this, there was a very demanding schedule and difficulty relative to two foreign languages (French and English). Furthermore, the Canadian mining law at this time kept women out of the mine, so she could not make training course. After four years of study, she was the first woman to graduate of the Department of Geological Engineering of Laval University. In June 1969, Hoàng T. T. returned to Viet Nam and three months later she started to work at the Geological Survey of Saigon, which depended on the Ministry of Economy of that time. In this survey, there were two French expert geologists. One took her on the field to explain the geology of the country. The other passed on his experience about the mineral study by X-rays to her. The first expert, Henri Fontaine, became, from 1971 to 1973, director of her thesis of engineering doctor, which was carried on the study of the clays of southern Viet Nam and their industrial uses and on the history of the geological surveys of Indochina (1898-1953) and of Republic of Viet Nam (1953-1973). Many small deposits, almost kaolin, were during longtime exploited for making porcelain or ceramic products, as well as bricks and roofing tiles. On the view of mineralogy, these clays were unknown. With the help of a diffractometer, Hoàng T. T. analyzed about a hundred samples of clays from diverse origins: kaolin from alluvions of ancient Quaternary (Province of Bình Dương, Biên Hoà) ), the clays of recent alluvions (different localities between Mekong and Đông Nai river), or from the weathering of granite, rhyolite and shale of Đà Lạt area (Province of Lâm Đồng). At the same time, she mentioned for the first time in Viet Nam the existence of bentonite being under a cover of red basaltic earth at Di Linh (Province of Lâm Đồng). Of volcano-lakeside origin, this clay was reported but not analyzed by Edmond Saurin In 1974, she discovered the same bentonite at Bảo Lộc area (Province of Lâm Đồng)(mixed with fragments of brown coal) and early 1975 at Tuy Hoà area (Province of Khánh Hòa). The study of these samples was not published because of politic events. Hoàng T. T. often accompanied Dr H. Fontaine in his archeological researches. In 1971, they discovered and excavated a funeral jars site at Phú Hoà (Province of Đồng Nai). Dated roughly 500 years B.C., this site belongs to Sa Huynh culture. The study of this site permitted her to become the first Vietnamese woman archeologist. In 1974, General Agency of Oil-Gas and Mineral Resources (Tổng cục Dâù Khí và Khoáng Sản) was founded and divided in different departments, of which the Centre of Geological Research (former Geological Survey) which included three surveys: research, chemical laboratory, library & geological museum. She was required to accept to be chief of the latter (library & geological museum), to keep her X-ray lab and her research work. Between 1972 and 1974, she gave some lectures at two Universities of Huế (about 700 km northeast Saigon) and of Cần Thơ (about 150 km southwest Saigon). On 1 May 1975, the communists took power over South Viet Nam. Hoàng T.T. participated in a group of street sweepers and market cleaners near her home. All former state employees and the former military had to follow a political re-education. The duration of these courses varied from three or ten days in their survey, to one month in a camp. The latter was reserved for former chiefs of survey, directors…and military officers. Being former chief of survey, she had to go to a camp in theory for one month (in reality it was indefinite). The day before her departure, without explanation, she was authorized to stay and to follow three days of politic re-education. During four years, except some short trips on the field with new colleagues (geologists and archaeologists) from the North, she could make nothing else.

1979–2009

… excerpt ends here. Continue reading the full article.

Worked examples

Example 1 — a first encounter with Hoang Thi Than

Start with the simplest possible case. Write down what Hoang Thi Than claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In astronomy, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Hoang Thi Than before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Hoang Thi Than ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Hoang Thi Than

In research: Hoang Thi Than appears in astronomy research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Hoang Thi Than in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Hoang Thi Than is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1944 births, 21st-century Vietnamese scientists, 21st-century Vietnamese women, so understanding it makes those chapters shorter.
In everyday life: Look for Hoang Thi Than outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Hoang Thi Than in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Hoang Thi Than means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Hoang Thi Than out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Hoang Thi Than in simple terms?

Why does Hoang Thi Than matter?

Because it connects several astronomy ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Hoang Thi Than?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Hoang Thi Than.