Jo Nov 10, 2022
“Computer Application in Major Field” is a subject that studies the ways of using applications for the simulation and analysis of scientific and technological calculations in the field of materials engineering and hydrodynamical processes in hydrometallurgy.
In the past, teachers had some problems with stimulating students’ thinking for developing their creativity and raising their program application abilities.
Therefore, Kim Chol Nam, a researcher at the Faculty of Metal Engineering, has introduced problem-based learning (PBL) whereby students could seek discussion points and solutions to them on their own, in order to enhance their application abilities of simulating and analyzing hydrodynamic problems arising in process operations.
First, while he was explaining the principle of the process by using a virtual reality system, he led them to discovering problems and finding solutions from FLUENT library. It was helpful for students to have a full understanding of the hydrodynamic principles of hydrometallurgy.
After they studied the hydrodynamic quantities for turbulent kinetic energy in FLUENT library, he taught them the method of determining the agitation characteristics so that they could have a technical and hydrodynamic notion of hydrometallurgy. In a word, he emphasized that the agitating condition was an important factor in the chemical reactions made in a leacher with air agitation and the quantity was turbulent kinetic energy and that it could be calculated simply in FLUENT. As a result, they became more enthusiastic in their study with confidence that they could solve any hydrodynamic problems by utilizing applications.
Second, he designed his teaching plan in a way that students could be familiar with how to simulate and analyze the process through an understanding of the process, a determination of its factors, an analysis and a determination of reasonable parameters, and raise their application ability, all by introducing PBL.
It is the basic purpose of PBL to raise the ability of application and self-study by making the discovery of questions and solving them a process of inquiry and cooperation.
With a good understanding of the chemical reaction process in the leacher with air agitation through the virtual reality system, the students raised by themselves several questions like improving the agitating condition, an important factor that affects reaction rates, that is, the relative position between the circulating pipe and the air inlet and the ratio of the diameter of the inlet and the circulating pipe to the diameter of the leacher body. While finding ways to solve them, they were able to raise their ability of application and self-study.
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Jo Nov 8, 2022
Sinji letters are the first national letters made after several stages of letter life as a result of a long time of thinking and painstaking inquiry of the ancient Korean people who created their own language Korean to use as a powerful weapon for struggle and creation in the remote past.
Sinji letters were invented by a man called Sin Ji in Ancient Korea. The word sinji meant a big man, so it usually referred to a ruler, a master or a boss. In the historical records, the word sinji is written in several Chinese characters ―神誌 (sinji), 神志(sinji), 巨智(koji), etc. ― which have no connections with the meanings of each character but are of the same sound as the native Korean word sinji. Sinji letters are also recorded as wangmun (王文), which means that they were used by rulers including kings. It reflects the social and historical characteristics of the past societies like a slave society where the ruling classes used to hog letters, and at the same time it has some connections with the meaning of the name “sinji letters”.
Historical books “Kyuwonsahwa” and “Pyongyangji” have some records associated with sinji letters. In later national classics “Haedongryoktaemyonggaphilbo” and “Nyongbyonji” are recorded sixteen of the sinji letters of Ancient Korea, which became widely known to the world. Due to the lack of the remaining data, things like the number and system of the sinji letters, sound values of each letter and norm of use have not been fully illuminated yet. However, it is clear from the form of the letters that they were phonetic and syllabic letters and they were written downwards. The fact that similar letters are engraved on several archaeological relics such as earthenware of Ancient Korea and blocks of Rangnang old tombs proves that sinji letters were widely used in Ancient Korea.
In conclusion, sinji letters convincingly demonstrate that the Korean nation is a resourceful nation that created their independent national letters as early as in ancient times and developed their own unique civilization on the basis of them.
Kim Kwang Jo, researcher at the Academy of Social Sciences
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Jo Nov 6, 2022
“Structural engineering of thermal facility” is a subject which studies theories and techniques related to the design, fabrication and structural safety of thermal power facilities.
In the past, the cognitive faculty and the level of 3D design and structural analysis of students were low due to the lack of concrete images of thermal power equipment.
Pak Un Hyok, a researcher at the Faculty of Heat Engineering, has introduced practical 3D models and applications to his subject to ensure high cognition effect and application ability whereby students could satisfactorily solve problems arising in reality.
Firstly, he has presented practical problems for their individual tasks and asked them to solve them by using application codes.
Secondly, while giving theoretical knowledge, he has taken some minutes in his lecture to explain solutions to practical problems by application codes.
With a brief introduction of the mathematical induction, he has given detailed explanations of the ways of solving problems by ABAQUS and the results so as to enhance students' cognition and application faculty.
Thirdly, for better cognition effect, he has created, collected and edited real objects and models of ordinary thermal power facilities.
All these have proved useful in increasing the teaching intensity and the creative thinking ability of students.
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Jo Nov 4, 2022
Okryugum was invented in the 1970s as an original national flick instrument by developing wagonghu, one of the old national instruments that had been passed down from ancient times. Chairman
Okryugum consists of the body made up of a resonance box and tune adjusting pedals, and the legs. The seven tune adjusting pedals attached to the legs make variations possible in any conditions. It has a total of 33 strings. It has two bridges on the resonance box; one on the front side and the other on the eight pillars at the back.
Okryugum is a C instrument which ranges from C2 to G4. There are seven pedals that are arranged in order of C, D, E, B, A, G and F from the left.
Okryugum produces clear, elegant and beautiful tones true to the meaning of its name. Its tone is so diverse that a single pluck sounds like a harp, a piano, a kayagum or a guitar. Such tones blend well to produce a silvery one. Since it fully supports a chromatic scale and vibratos like a kayagum, it is regarded as a unique and excellent national instrument with a great power of expression. It is used as a solo instrument and plays an important part in a national instrument ensemble as well as in guaranteeing the national colouring and sentiment of the mixed orchestra of a Juche type with extraordinary tones and ample volume.
Ri Yong Ho, section head at the Academy of Social Sciences
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Jo Nov 2, 2022
“Device Driver” is a subject which deals with design technology of a program controlling peripherals connected to a computer system and interfaces.
In the past, when they taught general structures and programming methods of a character device driver, a block device driver and a network device driver, teachers failed to refer to individual devices in close combination with a control program. Without suitable examples found in reality, students confined themselves to getting a general understanding of the programming method, far from gaining knowledge of devices used in practice.
Kim Kuk Song, a researcher at the Faculty of Information Science and Technology, has associated his subject “Device Driver” with an embedded system, thus overcoming above-mentioned shortcomings.
First, he presented the information about Linux device driver of the embedded system in his teaching plan and gave specific examples in order to raise cognition effect.
As a device driver depends on I/O management of the operating system, he gave a general outline of the functions supported by Linux kernel in each section and explained with concrete examples which devices of the embedded system needed such functions.
Second, he organized practice hours in a way that students could consolidate what they learnt in lectures and develop their skills whereby they could write device drivers needed in reality by themselves.
The practical teaching content helped students understand how to write a device driver, but it still left those with lack of experiences with difficulties in practice.
Therefore, he applied a teaching method to help students to plan, design, make and control device drivers by themselves.
The first thing he did was to decide practice tasks for students to put their knowledge to practice and to show how a device driver worked in an embedded system so that students would be aware of the scale and capacity of a design object and the technological requirements to be solved. The next thing was to provide them with up-to-date data related to an embedded system so that they could select properly by themselves necessary handbooks, drawings, electronic circuits, example codes for a device driver, etc.
Until a device driver was finished, he repeatedly explained the building of cross development environment, translation, debugging, porting and downloading of source codes to the embedded system, and running methods.
As mentioned above, theoretical teaching contents on I/O management in an operating system combined with the structure and operation of peripherals and a device driver for controlling them and display of the operation of a device and a driver based on an actual one raised cognition effect among students. Students could develop their ability of utilizing the development kit for an embedded system while trying to develop device drivers by using a computer and an embedded device.
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Jo Nov 1, 2022
A mask dance that has been enjoyed by the Korean people is the oldest of all Korean folk dances. The mask dance evolved from a hunting dance that primitive people used to do wearing animal masks.
An animal mask dance was dominant in the primitive and ancient times, while a human mask dance that gave a vivid description of human life was also popular in the period of the Three Kingdoms. Some of the human mask dances were painted on some murals of the Koguryo tombs and some others were similar to “Kiak Dance” of Koguryo and Paekje. In the period of Palhae and Later Silla, there were several kinds of mask dances like Dragon Mask Dance of Palhae, “Choyong Dance” of Later Silla, Lion Mask Dance described in “Hyangak 5 Dances”, Woljon, Sokdok and Taemyon. During the Koryo dynasty, the mask dance became more diverse in kind and mask dance dramas that showed historical facts as they were also became fashionable. During the feudal Joson dynasty, the mask dance performed by village dancers, developed into a folk dance with provincial features. The mask dances in the latter half of the feudal Joson dynasty are classified with each local distinction into Pongsan Mask Dance and Haeju Mask Dance in Hwanghae Province, Lion Mask Dance in Phyongan Province and Hamgyong Province, Sandae masked drama in Kyonggi Province, Ogwangdae Dance and Field Dance in Kyongsang Province.
The folk mask dance loved by our people is valuable heritage of our national dance and an excellent cultural treasure that deserves to be boasted of to the world. As mask dances were performed mainly on outdoor stages, movements of arms and legs rather than acting or words raised artistic influence by giving a vivid and skillful portrayal of life.
To sum up, the Korean mask dance is one of the precious legacies of national culture with a long tradition and rich contents that represents the national aesthetic sense and emotions by dint of diverse and unique dancing techniques, and it is still widely danced with eternal viability.
Kim Son Yong, researcher at the Academy of Social Sciences
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