Jo Sep 15, 2023
A research team led by Song Yong Dok, a researcher at the Faculty of Distance Education, has developed a new analysis system based on face-image recognition for evaluating students’ study attitude.
The system can analyze students’ emotions by recognizing, detecting and verifying their face-images. Emotion affects study attitude to such a great degree that emotion analysis plays a big part in analysis of study attitude.
The system consists of image input module, image recognition module, emotion detection module, expression detection module, attitude analysis module, etc. In the image input module, images or real-time images taken by an IP camera and a Web camera are fed. In the image recognition module, one or more students are identified and feature points on their faces are extracted. In the emotion detection module, students’ main feelings are detected in 8 kinds including happy, sad and surprised and they are presented on value-charts. In the expression detection module, expressions like smile, laugh, blink, opened mouth, frowning, etc. are detected.
This system can put education management on a scientific basis by analyzing students’ study-attitude and automatically checking their attendance.
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Jo Sep 14, 2023
Mun Chol Su, a researcher at the Faculty of Metal Engineering, has developed an analytical method and analytical instrument for analyzing rapidly and accurately group of pitch binder that used to take a long time.
Rapid and accurate evaluation of the quality of pitch binder used for electrode production is important for scientific production and active and timely quality control of products.
Group composition is a very important parameter for evaluating the properties of binders used for electrode production and for determining the appropriate process conditions, but long analysis time limits their wide application on production sites.
In order to reduce the time spent on group composition analysis, he employed a reduced pressure filtration method, and a method of simultaneous analysis with different solvents for one sample, thus greatly shortening the analysis time.
Then, he designed and manufactured an instrument for rapid analysis of the group composition to minimize errors made by unskilled analyzers and to prevent environmental pollution inside analytical chambers by organic solvents.
The instrument consists of a thermostatic dissolver, a suction filter, and an exhaust fan, and temperature measurement and time adjustment in each section are automatically controlled by a microprocessor.
The thermostatic dissolver is designed so that solvents and samples can be heated in a water bath at a specified temperature, and temperature measurement and temperature control are carried out by an intelligent PID thermostat.
The suction filter is designed to allow rapid filtration of dissolved pitch samples and solutions in the thermostatic dissolver under reduced pressure.
The exhaust fan is placed inside the instrument to discharge volatile organic solvent to the outside and to work all the time of analysis.
Now, it only takes about five hours for one analyzer to perform a group analysis that used to take over 50 hours, which means reduction in the consumption of labour and power.
The analytical method and instrument might help the factories and enterprises that use pitch as binder quickly and actively control their production processes in accordance with the changing conditions of raw material supply.
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Jo Sep 10, 2023
The earth’s orbit around the sun is divided into 24 with a central angle of 15°. The 24 points were given names to be 24 divisions of the year.
Each month has two divisions. Although the dates differ one or two days every year, the central angle, that is, the position of the earth stays the same.
The names of the 24 divisions reflect the experiences accumulated in the course of nature study and life from olden times and the simple desire of our ancestors quite accurately.
Even in present days the divisions give a lot of help in everyday life and organizing agricultural production.
The names Chunbun, Chubun, Haji and Tongji are related to the length of the day and night while Ripchun, Ripha, Ripchu and Riptong refer to the beginning of four seasons.
Sohan, Taehan, Choso, Taeso, etc. describe the degree of coldness and warmth. Usu, Kogu, Sosol and Taesol are associated with the period of rainfall and snowfall.
Kyongchip represents revival of all things after winter while Chongmyong refers to the clearness of the sky.
Soman and Mangjong are directly connected with the farming season.
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Jo Sep 8, 2023
A research team led by Pak Kwang Hyok, a researcher at the Faculty of Distance Education, has conducted a study of GloVe (Global vector) for extracting the features of Korean.
While CBOW or skip-gram is the prediction task of a contextual word, GloVe is the presentation method by the number of co-appearance of words.
Skip-gram can reflect longer-distance information through skips between some words but this reveals a defect, that is, hard to reflect contextual information.
Therefore, Korean sentence corpora segmented by Byte Pair Encoder (BPE) are needed for extracting the features of Korean by means of GloVe.
The research team used an analysis engine based on the Long-Short Term Memory for BPE.
The research result showed that Korean feature extraction by GloVe was better in F-score estimation than that by CBOW or skip-gram.
This method can be applied to Korean sentence similarity evaluation for online exams and bibliographic search systems.
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Jo Sep 5, 2023
The Mausoleum of King Tongmyong is a tomb of King Tongmyong, the founder of the Koguryo dynasty, situated in Ryongsan ri, Ryokpho District.
The mausoleum was brought to the present site by the movement of the capital of Koguryo to Pyongyang in the fifth century.
It was rebuilt in May, Juche 82 (1993). It stands magnificently as if it was demonstrating the might of Koguryo, which was once a great power, as the mausoleum of the founder king.
It is a stone structure covered with earth facing the south. It has a huge pile of earth, which is 11.5 metres high.
On the four 34-metre-long sides of the bottom part is a platform built of properly faced stones. Around the tomb, some graveside structures are set up on the 5-metre-wide pavement of riverside gravels.
Before the tomb, several structures stand in good order as they were in the days of the Koguryo dynasty.
On the top floor in front of the tomb are a stone table, a stone lantern and two stone sculptures of tiger. Along the right and left sides stand sculptured figures of civil and military officers and their horses. A pair of stone posts and a stone stove are also found there.
Erected in the east on the lower floor are “Monument to Sage King Tongmyong, Founder of the Koguryo Dynasty” and “Historical Monument to Sage King Tongmyong, Founder of the Koguryo Dynasty” written in Chinese character with explanations in Korean. In the west is a building for memorial service and in the south is a gate.
Under the care of the Workers’ Party of Korea, the Mausoleum of King Tongmyong was rebuilt wonderfully and it has been in good preservation. It is now making a positive contribution to educating our people in the national pride and dignity and patriotic spirit.
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