Jo Apr 12, 2022
From the viewpoint of interpretation and methodology, quantum mechanics as one of the greatest achievements in the field of physics in the 20th century involves two formulations, i.e., the traditional standard formalism and non-standard formalism such as quantum mechanics in phase space, quantum trajectory formulation and path integral method.
Hibert-space formalism as the standard formalism yielded an excellent mathematical formulation for explaining the microscopic world such as atoms and subatomic objects. After that, the trajectory-based quantum mechanics such as Bohmian mechanics was proposed in order to improve mathematical formulation of quantum mechanics. Quantum mechanics in phase space also attracted a great deal of interest from the aspect of mathematical formulation, but the tasks of establishing an alternative independent formalism of quantum mechanics still remained not accomplished.
After as long as 15 years of painstaking effort, Jong Chol has proposed that it would be possible to establish an alternative autonomous formalism of quantum mechanics in phase space by means of a statistical method.
The proposed theory as a new formalism of quantum mechanics in terms of ensemble in phase space leads to obtaining within the framework of its theory the fundamental quantum-mechanical equation without recourse to other formulations of quantum mechanics, and gives the idea for operators pertaining to dynamical quantities.
The theory also demonstrates that the system of operators given by quantum mechanics in phase space is a complete system of quantum operators and it is possible to explain, using the fundamental equation, the structure of quantum mechanics in phase space and the approximation of the fundamental equation of the present formalism to the Schrödinger equation. Therefore, it concludes that quantum mechanics in phase space is the general formulation comprising the formulation in configuration space as a special case.
This formalism provides reasonable results of quantization by dealing with some simple cases such as the quantization of harmonic oscillation, the two-slit interference and the uncertainty relation, which confirms the validity and generality of this formalism.
In particular, this formalism shows that it is possible to easily obtain the relativistic wave equation by making use of the relativistic phase velocity without treating the problem of linearizing the Hamiltonian operator as in the case of the deduction of the Dirac equation.
The ultimate outcome this formalism produces is that it has been confirmed that primary and general matters of quantum mechanics can be studied reasonably within the framework of statistical mechanics.
This information is from the essay “Ensemble in phase space: Statistical formalism of quantum mechanics” presented by Jong Chol, a researcher at the Faculty of Materials Science and Technology, to the SCI Journal “Pramana Journal of Physics” 92:83(2019).
...
Jo Apr 11, 2022
The contests ended on March 28, 2022.
The first contest was held on March 11-14. About 19 900 people from tens of countries and regions including our country, China and India took part. 178 participants competed in Category 1, 2 105 in Category 2, and 6 227 in Category 3 and 11 415 in Category 4. Category 1 set forth 5 problems, none of which were challenge problems.
A total of 48 contestants won the first place in Category 1 ― 18 from the DPRK, 5 from China, 15 from India, 1 from Peru, 1 from Singapore, 2 from Bangladesh, 1 from Portugal, 1 from the UK, 1 from the US and 3 from Japan.
9 out of the 18 winners of our country are students at Kim Chaek University of Technology.
37.5% of the world winners are from the DPRK, and 18.75% are from KUT.
KUT students amount to half the 18 DPRK winners.
In the meantime, a student from KUT took the first place in Category 2.
The second contest went on from 25 to 28.
About 16 900 people from tens of countries and regions including our country, China and India took part. 93, 666, 4 581 and 11 593 contestants belonged to Category 1, Category 2, Category 3 and Category 4 respectively.
4 non-challenge problems were presented in Category 1.
Category 1 witnessed a total of 21 winners ― 15 from our country, 3 from China, 1 from Bangladesh and 2 from Japan.
All of the 5 students from Kim Chaek University of Technology took the first place in Category 1.
Our country has as many winners as 71.428% of a total of 21, and 23.809% are KUT students. KUT students account for 33.3% of DPRK winners.
...
Jo Apr 7, 2022
What is important in teaching English is to develop students’ practical skills and to train them to be active in thinking in English.
To achieve this goal, you can apply the principle of discovery to teaching English like any other subjects.
In general, the application of this principle means that a teacher does not give a conclusion in advance but leads them to acquire new knowledge like concepts and principles through the self-enquiry based on their activeness and creativity.
When teaching English, a teacher has to make students read textbooks or do exercises by themselves and have a discussion, and has to give an explanation on the problems important and difficult to understand only.
This teaching method consists of 4 stages: environment and assignment, discussion, leading and solution.
Environment and assignment:
In this stage new teaching materials are shown.
On the screen a teacher displays a certain text which is suitable for the level of students and related to their majors so that it can stimulate their enthusiasm for study. Also, the materials should be up-to-date, connected to everyday life and scientific knowledge and contain new vocabulary and grammar. Such materials are worth discussion.
Discussion:
Students have a discussion between themselves or with their teacher over specific questions given by the teacher. When a teacher arranges a discussion on relatively difficult questions, students form their opinions about them. In the discussion students compare and evaluate different opinions to reach an agreement.
Leading:
This stage leads students to achieving goals. By asking leading questions, a teacher leads students’ thinking to the world of analysis and summing up activities. Then they can discover new things by themselves.
Solution:
In the stage a teacher encourages students to find as much information as possible related to the given text, to make compositions using dictionaries and to present them before the class. Then the teacher comments on them, summarizes the main point and evaluates their study activities.
In summary, this teaching method helps students discover anything necessary by themselves as well as simple grammar rules.
In order to raise the teaching effectiveness of this method, you should present assignments and thinking questions commensurate with their levels and abilities, and organize your lectures in an interesting and varied way so that students can be fully involved in them.
...
Jo Apr 1, 2022
The teaching method to combine logic with English improves the standard of theory and helps students to have a clear understanding of logic as well as developing their application abilities through the combination of linguistic knowledge such as English vocabulary and grammar with the teaching content.
When we combine logic with linguistic characteristics of English, we can further improve the ability to understand new principles and to make use of English vocabulary.
First, it is important to give students a theoretical explanation of different ways of thinking on the basis of the relationship between the two different languages ― Korean and English.
Associating the explanation of the ways of thinking in Korean with different languages like English is helpful for students to notice the relationship between inferences and statements.
Second, it is important to present English equivalents to Korean sentences or words so that students can get the point easily on their own.
For example, when they are asked to define an inference in English with its structure as an intrinsic attribute and to analyse it logically, they are given chances to think about it logically and to make an active use of English vocabulary.
Third, it’s important to provide the differences in word orders between Korean and English to improve the cognition effect.
For instance, when you explain the differences between a concept and a word, by giving the differences in the word order you can make it clear that if certain expressions with the same words are different in the word order, they are different in their meanings.
As mentioned above, improving the level of theory combining the various linguistic characteristics of English in teaching logic not only helps students have a correct understanding of the gist of the lecture by themselves but also has a great significance to improve their ability of practical use of English.
...
Jo Mar 30, 2022
A supporting system for teaching and learning developed by a research team led by Han Pun Hui, a lecturer of logic, is a superior system that makes a favorable environment for the students to have high enthusiasm for study and grasp the heart of the problem actively and positively, so that it could enhance their creative thinking and applicative abilities.
This system presents dynamic and static images along with main thinking questions so students can get the main point of the lessons easily and clearly, and leads their discussion on a scientific basis and at the same time evaluates it real-time quantitatively.
The system, first of all, suggests main thinking questions that require highly vivid imagination as a preparation task.
The thinking questions should include those related to not only the principles of logic but also basic subjects such as mathematics, physics and social subjects so that they can promote the practicality of teaching.
Secondly, it helps students grasp the heart of a problem and enquire into new principles on their own initiatives by leading their discussion and debate on the main question through a bilateral communication network. In the bilateral communication network, it simultaneously receives students’ different answers on the thinking questions, and through the interface, it sets logical relations like deductive, inductive and analogic so that it could raise cognitive effectiveness to the maximum. Through this studying process, students not only can take the initiative in understanding the main point of the lecture but at the same time can possess ability to put logic knowledge into practice.
Furthermore, they can develop a creative thinking ability to find out new principles related to a defining method and its rules voluntarily.
In this way, the system can help students learn a lot more without any limitation of time and quantity and enhance their cognitive effectiveness by presenting thinking questions with dynamic images and receiving and evaluating their answers.
...