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What keeps you up at night? Pondering deep questions? Excitement about a big trip? Stress about unfinished work? What if the very thing keeping you awake was stress about losing sleep? This seemingly unsolvable loop is at the heart of insomnia, the world’s most common sleep disorder. So what is insomnia? And is there any way to break the cycle? Dan Kwartler details the science of insomnia.
- Course related:
- APSS1L01 Tomorrow's Leader
- Subjects:
- Health Sciences
- Keywords:
- Insomnia
- Resource Type:
- Video
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Video
Social systems are quickly becoming part of the real world and a reflection of it, a means by which we can communicate with each other more efficiently. With people at the center of the web, we have the ability to transcend our limited physical reality and create something that can connect us faster than ever before. But in this brave new world, we must understand our existing social truths -- why we are social in the first place and what our true needs really are -- to be the most effective. The talk explores the fundamental psychological underpinnings of our human society -- in the greater spectrum of humanity and evolution -- that can explain how we can utilize social technology to move us closer to our self actualization.
- Subjects:
- Sociology
- Keywords:
- Social systems
- Resource Type:
- Video
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Video
《典籍裡的中國》作為總台重點文化類創新節目，聚焦中華優秀文化典籍，從中甄選最值得講述的優秀傳統文化作品，以“文化節目+戲劇+影視化”的方式，講述典籍的成書、核心思想以及流轉中的閃亮故事，讓書寫在典籍裡的文字“活”起來，展現典籍裡蘊含的中國智慧、中國精神和中國價值。
- Course related:
- CC5001 Introduction to the Study of Chinese Culture
- Subjects:
- Chinese Studies
- Keywords:
- Civilization China History
- Resource Type:
- Video
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Video
This channel contains a complete list of physics videos, as well as hundreds of chemistry, astronomy, math, and mechanical engineering videos. The physics videos explain the fundamental concepts of physics with some easy to follow examples on how to solve physics problems. The chemistry videos cover all the basic topics of chemistry, the astronomy videos explain the wonders of Earth and our Universe, and the math videos cover many topics in algebra, trigonometry, pre-calculus, calculus and differential equations.
- Subjects:
- Chemistry, Mathematics and Statistics, Cosmology and Astronomy, Physics, Mechanical Engineering, and Electrical Engineering
- Keywords:
- Chemistry Astronomy Electrical engineering Physics Mathematics Mechanical engineering Kalman filtering
- Resource Type:
- Video
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Video
This electronics video tutorial provides a basic introduction into the node voltage method of analyzing circuits. It contains circuits with voltage and current sources. It explains how to determine every current in a resistor as well as the electric potential of all nodal points in the circuit.
- Course related:
- AMA2111 Mathematics I
- Subjects:
- Electronic and Information Engineering
- Keywords:
- Electric circuits Electric network analysis
- Resource Type:
- Video
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Video
In just two decades Vietnam's exports have skyrocketed. In the same time period, their GDP per capita also took a big jump from from 3 And, this is probably the only nation in Southeast Asia whose economy remained in a good shape despite the pandemic.
In 1986 Vietnam launched a political and economic innovation campaign Doi Moi that introduced reforms intended to facilitate the transition from a centralized economy to a "socialist-oriented market economy. Doi Moi combined government planning with free-market incentives. This was similar to what China was doing at that time. At first the program abolished agricultural collectives, removed price controls on agricultural goods, and enabled farmers to sell their goods in the marketplace. It encouraged the establishment of private businesses and foreign investment, including foreign-owned enterprises. By the late 1990s, the success of the business and agricultural reforms under Doi Moi was incredible. More than 30,000 private businesses had been created, and the economy was growing at an annual rate of more than 7 percent. From the early 1990s to 2005, poverty declined from about 50 percent to 29 percent of the population. However, progress varied geographically, with most development concentrated in urban areas. While the country has shifted toward a more market-oriented economy, the Vietnamese government still continues to hold a tight rein over major sectors of the economy, such as the banking system, state-owned enterprises, and areas of foreign trade.
Also from the last 20-30 years Vietnam invested a lot in its human capital and infrastructure. Vietnam made large public investments in primary education. This was necessary, as a growing population also means a growing need for jobs. But Vietnam also invested heavily in infrastructure. And those investments paid off, with the necessary infrastructure and with market-friendly policies in place, Viet Nam became a hub for foreign investment and manufacturing in Southeast Asia.
Yet despite becoming an industrial giant, Vietnam's agricultural sector is still a major pillar of the economy. Agriculture represents 14% of GDP and employs 36% of the total workforce in 2020. Whereas Industry contributed 34.5% of GDP and employed 28% of the total workforce. Service sector represented 41.6% of GDP and employed 35% of the total workforce.
Now if you look at the trade. Today China is Vietnam’s leading trading partner with a total import and export value of US$106.7 billion, making up 22.2% of the country’s total imports and exports. Apart from China, South Korea and the US combined makes 26% of total trade which is value's 120 billion dollars.
The International trade agreements of the country have been playing a good role. In 1995, Vietnam joined the Asean free trade area. Then in the year 2000, they signed a free trade agreement with the US, and in 2007 joined the World Trade Organization. While having trade agreements with China, India, Japan and Korea. And how can we forget the recently amended Trans-Pacific Partnership. These agreements are helping the country to climb up in the value chain of the world economy.
So at the end, we can say that, in the past 30 years Vietnam has achieved tremendous growth and it is still one of the fastest growing economies. And even with all these challenges, Vietnam has potential to join the club of the high income status. And who know someday they could get near the ranks of China.
- Course related:
- AF2602 Global Economic Environment
- Subjects:
- Finance and Economics
- Keywords:
- Vietnam Economic history
- Resource Type:
- Video
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Video
We're going to take apart a plastic anatomy model and see what we can find in the abdomen. We'll identify as many organs as we can, see how they fit into the abdomen relative to one another, working our way from anterior to posterior.
- Course related:
- HTI17102 Imaging Anatomy
- Subjects:
- Health Sciences and Biology
- Keywords:
- Organs (Anatomy) Abdomen
- Resource Type:
- Video
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Video
Uniform circular motion, Coulomb's Law and angular momentum quantization are used to derive an expression for the radius in the Bohr Model.
- Course related:
- AP20015 Physics in Radiological Science
- Subjects:
- Physics
- Keywords:
- Quantum theory
- Resource Type:
- Video
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Video
課程簡介：微分表切線斜率，積分表曲線下圍出的面積，兩截然不同的東西透過微積分基本定理連結在一起。
- Course related:
- AMA1007 Calculus and Linear Algebra
- Subjects:
- Mathematics and Statistics
- Keywords:
- Calculus
- Resource Type:
- Video
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Video
Comparing initial rates to determine the order of reaction is a very common question in Kinetics.
Let's take a look at an example:
The objective is to choose a pair of experiments for comparison where the concentration of a reactant changes and ideally the concentration of other reactants remain constant. This means that any change in the initial rates of the experiments must be due to the change in the concentration of that reactant, and we can figure out the order from there.
1. Order of Reaction with respect to HCl
Comparing experiments 1 and 3, concentration of HCl doubles and there is no change in concentration of sucrose. So the change in initial rates must be due to HCl only. We can work out the change in initial rates to be 2 times. This means when concentration of HCl doubles, initial rate doubles. Therefore order of the reaction with respect to HCl will be order 1. For comparison, if order of reaction is zero, initial rate will remain unchanged when concentration of HCl doubles. If order of reaction is 2, initial rate will increase by 4 times (2^2 times) when concentration of HCl doubles. Since we only have 3 possible orders to consider, figuring out the order of reaction is quite straightforward.
2. Order of Reaction with respect to sucrose
Comparing experiments 1 and 2, concentration of sucrose increase by 1.5 times and there is no change in concentration of HCl. So the increase in initial rates by 1.5 times must be due to sucrose only. Since this is a proportionate increase, order of reaction with respect to sucrose is also order 1. Finally we can write out the rate equation for this reaction to be: rate = k [HCl][sucrose]
- Course related:
- ABCT 2701 Analytical Chemistry
- Subjects:
- Chemistry
- Keywords:
- Chemistry Physical theoretical
- Resource Type:
- Video