• YAKHAK HOEJI
• /
• v.20 no.3
• /
• pp.138-144
• /
• 1976

In previous communications$^{1-6)}$, the results of the preliminary phytochemical examinatioins of 261 plant samples which have been used in medicine in Korea were reported. In continuation of this program we now present in Table I the results of chemical examination of another 92 species, belonging to 80 genera nad 48 families, which were screened for the presence of alkaloids, saponins, terpenoids, and flavonoids. The list of folk medicines described by Lee$^{7)}$ was used as a guide in the selection of plants to be tested.

• Korean Institute of Interior Design Journal
• /
• no.14
• /
• pp.19-26
• /
• 1998

The purpose of this research is to examine the scope and effectiveness of the utilization of computer programs in universities and educational institutions teaching and training subjects related to interior construction such as interior and exterior design display coloring furniture design perspective drawing expression technique space planning lighting design and portfolio production. The list of currently available non-CAD computer programs for these purpose and the effectiveness of utilizing adobe photoshop in interior design will be examined.

• Korean Management Science Review
• /
• v.15 no.1
• /
• pp.49-62
• /
• 1998

The purpose of this paper is to develope a large-scale simplex method program LPAKO. Various up-to-date techniques are argued and implemented. In LPAKO, basis matrices are stored in a LU factorized form, and Reid's method is used to update LU maintaining high sparsity and numerical stability, and further Markowitz's ordering is used in factorizing a basis matrix into a sparse LU form. As the data structures of basis matrix, Gustavson's data structure and row-column linked list structure are considered. The various criteria for reinversion are also discussed. The dynamic steepest-edge simplex algorithm is used for selection of an entering variable, and a new variation of the MINOS' perturbation technique is suggested for the resolution of degeneracy. Many preprocessing and scaling techniques are implemented. In addition, a new, effective initial basis construction method are suggested, and the criteria for optimality and infeasibility are suggested respectively. Finally, LPAKO is compared with MINOS by test results.

• Steel and Composite Structures
• /
• v.19 no.4
• /
• pp.1035-1053
• /
• 2015

A genetic algorithm-based minimum weight design method is presented for steel frames containing composite beams, semi-rigid connections and column bases. Genetic Algorithms carry out optimum steel frames by selecting suitable profile sections from a specified list including 128 W sections taken from American Institute of Steel Construction (AISC). The displacement and stress constraints obeying AISC Allowable Stress Design (ASD) specification and geometric (size) constraints are incorporated in the optimization process. Optimum designs of three different plane frames with semi-rigid beam-to-column and column-to-base plate connections are carried out first without considering concrete slab effects on floor beams in finite element analyses. The same optimization procedures are then repeated for the case of frames with composite beams. A program is coded in MATLAB for all optimization procedures. Results obtained from the examples show the applicability and robustness of the method. Moreover, it is proved that consideration of the contribution of concrete on the behavior of the floor beams enables a lighter and more economical design for steel frames with semi-rigid connections and column bases.

• Proceedings of the Korean Operations and Management Science Society Conference
• /
• 1998.10a
• /
• pp.63-66
• /
• 1998

In the implementation of the simplex method program, the representation and the maintenance of basis matrix is very important, In the experimental study, we investigates Suhl's idea in the LU factorization and LU update of basis matrix. First, the triangularization of basis matrix is implemented and its efficiency is shown. Second, various technique in the dynamic Markowitz's ordering and threshold pivoting are presented. Third, modified Forrest-Tomlin LU update method exploiting sparsity is presented. Fourth, as a storage scheme of LU factors, Gustavson data structure is explained. Fifth, efficient timing of reinversion is developed. Finally, we show that modified Forrest-Tomlin method with Gustavson data structure is superior more than 30% to the Reid method with linked list data structure.

• Journal of Korean Library and Information Science Society
• /
• v.22
• /
• pp.277-297
• /
• 1995

Historical study on the reading in Choson has been mostly focussed on few scholar's viewpoint of reading. This research has revealed the reading process of So Myong-So, and has compared it with the reading process of other scholars. As a result of the research the following have been clarified. a. So Myong-so reorganized the reading process of Yuk Se-ui, divided it into the five steps, and made the systematic reading program. b. So Myong-so made the list of selected books which included not only confucian literature, but also taoist, buddhist, and practical. c. So's reading process and selected booklist were different in system and scale from other's : Im Sang-dok, Hwang Dok-gil, and Kang P'il-hyo.

• Korean Journal of Child Studies
• /
• v.28 no.4
• /
• pp.97-111
• /
• 2007

Children from low-income families are vulnerable to variable psychological and emotional stress related to financial issues and dysfunctional families. The subjects were 15 1st to 3rd graders who were low on the Self Esteem Scale (SES). They were attending an after-school center for elementary school students. They participated in three art therapy groups from April to October 2005. Children's depressive symptoms and self-esteem were assessed using the Children's Depression Inventory (CDI) and an observational check-list. Results showed that the group art therapy program brought about significant effects on increasing self-esteem of the children and reducing depressive symptoms, showing that group art therapy can facilitate emotional and psycho-social growth of children from low-income families and can be developed in family-based community programs.

• 전기의세계
• /
• v.23 no.1
• /
• pp.61-68
• /
• 1974

This paper attempts to develop the algorithms and computer program for load flow solution and faults analysis of large power system by small digital computer. The Conventional methods for load flow solution and fault analysis of large power system require too much amount of computer memory space and computing time. Therefore, this paper describes the methad for reducing the computer memory space and computing time as follows. (1) Load Flow Solution; This method is to store each primitive impedance of lines along with a list of bus numbers corresponding to the both terminals of lines, and to store only nonzero element of bus admittance matrix. (2) Faults Analysis: This method is to partition a large power system into several groups of subsystems, form individual bus impedance matrix, store them in the storage, and assemble the only required portion of them to original total system by algorithm.

• Proceedings of the Korean Society of Marine Engineers Conference
• /
• 2005.11a
• /
• pp.176-177
• /
• 2005

KOWACO - ChangWon Branch - have conducted the new study which aimed to improve flocculation performance in Mixers. The Purposes in this study were increasing flocculation efficiency by finding significant factor which was affected flow characteristics. In the result of this research we modified the error in equation of G-value and RPM which have been used till quite recently. Also we developed program auto-calculating G-value and RPM and then we had made their statistical list. We had conducted experiment with flocculation Mixer's model sized 1/10 by PIV's method. We analysed characteristic of all flow fields by changing case such as changing direction of flocculator roatation etc.

• Transactions on Electrical and Electronic Materials
• /
• v.16 no.1
• /
• pp.25-28
• /
• 2015

In this study, a basic research on artificial liver was performed for its application to people on the waiting list of liver transplant or patients with hepatic insufficiency. Artificial livers are generally classified into mechanic type, bioartificial type, and hybrid type. An extracorporeal circulation device was examined herein, which is indispensable in the application of an artificial liver, for its effectiveness in supporting the recovery of liver functions. Extracorporeal circulation system is a treatment and life-support system which sends out the patient's blood, removes toxicity by various methods, and then sends the blood back to the interior of the body. This study used an extracorporeal circulation system which enables the Plasma Perfusion by CVVH method, and applied the program of Bioateco corp. Animals with acute hepatic insufficiency were produced to apply the extracorporeal circulation device. As a result, their ammonia, bilirubin, SGOT, SGPT, and bile acid levels rose, confirming the liver function restoration in the experimental animals.