Jo Sep 13, 2021
Kim Song Chol, researcher of the Faculty of Mining Engineering proposed a method to improve the accuracy of type curve for analyzing well-testing data.
It is the premise for the scientific development of the oil deposit to improve the accuracy of type curve for analyzing well-testing data.
The type curve for analyzing well-testing data, which can be obtained by solving the percolation differential equations, normally uses the Laplace transformation and numerical inverse.
In his paper, he combines the NILT based on infinite series with Levin convergence acceleration and determines necessary parameters through numerical experiments, thus improving accuracy and speed of numerical inverse Laplace transformation(NILT). And he compares the improved method with the Stehfest method using some functions such as trigonometric function.
And by applying the numerical inverse Laplace transformation and numerical inverse Stehfest Laplace transformation, he obtains and compares type curves for the analysis of well-testing data for the dual porosity reservoir respectively to indicate how that type curves plotted by the improved method are less in vibration.
His paper “Improved numerical inverse Laplace transformation to improve the accuracy of type curve for analyzing well-testing data” is carried on Sci magazine “Acta Geophysica”.
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Jo Sep 6, 2021
There has been an on-line National Public Presentation Meeting of Information Science and Technology under the joint auspices of the Central Committee of General Federation of Science and Technology of Korea and Education Commission from 17 to 19 of August.
This forum is focused on exchanging and propagandizing the achievements of educational information to provide students with constant education in such an emergency as worldwide healthcare crisis and natural calamities.
100 papers were put forth to the forum that drew teachers, researchers, postgraduate students, and students from several institutes including
The paper “Realization of off-line study-aid system for implementing the curriculum of undergraduate students during the emergency anti-epidemic period” presented by Ryu Chang Sik, head of lab, Faculty of Distance Education has been appraised as an excellent one for bringing about a practical advance in improving the educational contents and methods required by the world educational trend and the pedagogical requirements.
In addition to this, several papers of KUT have been estimated valuable.
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Jo Sep 5, 2021
Jang Kyong Wol, researcher of Robotics Institute presented a paper “A Tool Tilt Angle Calculation Method in 5-axis Flat-end Milling for Free Surface Machining” to EI Journal “International Journal of Industrial and Manufacturing Systems Engineering”.
Having analyzed the previous research results, she pointed out that CAD/CAM systems were not fully functioned in free surface machining because of the complex expressions.
Using quadric equation she succeeded in simply calculating the tool tilt angle and machining strip width produced in free surface machining with 5-axis flat-end milling. From this she proposed a calculation method to shorten the machining time by a great deal as well as to improve the effectiveness of machining.
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Jo Sep 2, 2021
Jon Min Hyok, lecturer of Faculty of Shipbuilding and Ocean Engineering presented a paper “Determination of a safety criterion via risk assessment of marine accidents based on a Markov model with five states and MCMC simulation and on three risk factors” to SCI Journal “Ocean Engineering”.
He pointed out the shortcomings of the previous research that failed to give a scientific analysis of accident risks according to their types in the correlation, and he analyzed the data of the accidents occurred in the past. On the basis of this, he proposed for the first time Markov model that has major types of marine accidents as state space and numerically assessed marine accident risks with Markov Chain Monte Carlo Method.
He also assessed the marine accident risks considering the state of the seas, traffic density and the length of the ships.
Combining these assessment methods he set the criterion of marine safety in a particular sea area.
His proposals that do not need a large scale of data collection are simple and can be applied to any marine accidents.
These methods and criterion would make it possible to ensure safe navigation by warning risks in advance on the waterways and to minimize the loss of human and material and environmental damage by dint of an immediate action in case an accident happens by laying marine rescue equipment on the waterways and sea areas with high chances of potential risks.
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Jo Sep 1, 2021
Jong Kwang Hyok, the head of Laboratory at Faculty of Applied Chemical Engineering and his research group succeeded in producing non-toxic low-cost nano micellar functional material that can be used as starch derivative for drug delivery, high purity refiner of the object material and environmental improvement material with our own raw material.
This functional polymer based on starch guarantees 15~80℃ of thermal response range, ±0.1℃ of response accuracy, 1~10.4 of pH response range, and 50~90mg/L of micelle critical concentration range.
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Jo Aug 20, 2021
Choe Yong Myong, student in the 5th grade at Faculty of Applied Mathematics, Kim Chaek University of Technology, has been a member of the family of the special class disabled soldier couple for nearly 20 years since the day of his first visit with his parents on January 1, Juche 92(2003) when he was 3 years old.
What was imprinted on the pupils of the young boy’s eyes was his father and mother, who kept running about in sweat to help the disabled soldier who was always on the bed. Today the student is following this road.
In his childhood he spent more days with the cheerful passionate disabled soldier rather than with his grandmother, who took every possible care of him. Sometimes he had to get punished before the strict “uncle” when he failed to do his homework because of himself much absorbed in play. However he was always at his side.
When he went to university after the middle school, he paid more and more attention to the disabled soldier.
The ideological and moral world of the disabled soldier, who took treatment strenuously with strong will withstanding the unbearable pain for 24 years in bed and who was even more passionate than any of his colleagues was inscribed as the mirror which the student reflected himself in.
It seems to be the reason why his heart towards the soldier got warmer and warmer as the days went by.
He did devote himself to the soldier from the childhood when he put various kinds of healthy food prepared by his mother into the soldier’s mouth, and the middle school days when he read a book at the bedside, to the university days when he gave the soldier his favourite computer, taught him how to type on the keyboard and to use application software, and translated a number of foreign books and magazines needed for his treatment.
Choe Yong Myong and his parents found the word “one family” not in the lines from a book but on their own skin and flesh.
Therefore special class disabled soldier Hong Kum Chol and his wife Ju Kum Hwa expressed their feelings in the letter to KUT as follows:
“The Workers’ Party of Korea, our socialist country training a huge army of such reliable youths is the best in the world!”
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