• Journal of the military operations research society of Korea
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• v.36 no.3
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• pp.15-27
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• 2010

Dual-use technology, upon its effective development, can be a highly efficient technology that may be utilized for both achieving industry competitiveness and building National Security. Although research needs for such development methodology and call for corresponding efforts have long been proposed, actual outputs have not reached its desired level. Hence, this paper aims to provide more concrete and quantitative process in technology planning used to activate development of dual-use technology, considering dual usability and transferability of such technologies. In such effort, we propose use of patent analysis and the Analytic Hierarchy Process (AHP) for determining priorities for spin-off defense technology. First, the necessity of R&D and potential spin-off are measured based on patent information. Second, the necessity of R&D results from a quantitative analysis and the potentials spin-off are derived from analysis of patent citations. Then, AHP is used to calculate the importance of evaluating factors, and to assess alternative scores. Finally, we present the result of spin-off priority. A case study on the Korea defense technology is presented to illustrate the proposed method. We expect this study to make contribution in vision making of the military R&D spending.

• Clinical and Experimental Pediatrics
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• v.51 no.4
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• pp.426-430
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• 2008

We report clinical, cytogenetic, and fluorescence in situ hybridization (FISH) studies of a patient with ring chromosome 9. She presented with failure to thrive, facial dysmorphysm and mild psychomotor development delay in the absence of major malformations. Peripheral blood karyotype of the patient was 46,XX,r(9)(p24q34). G-band analysis suggested no loss of material in the ring chromosomes. FISH analysis using the subtelomere-specific sequences on chromosome 9p and 9q, revealed 46,XX,r(9)(p24q34),ish r(9)(D9S913-,D9S325+). Failure to detect any hybridization of a probe for the subtelomeric sequences in the ring 9p terminal suggested that this ring arose from breakage in the distal short arm. The cytogenetic and FISH data in our case provided further evidence for the existence of a "complete ring" phenotype with incomplete subtelomeric sequences.

• Korean Journal of Microbiology
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• v.48 no.2
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• pp.57-65
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• 2012

Phosphorous is an essential element for the synthesis of various biomolecules including phospholipids, carbohydrates and nucleic acids. Bacterial cells can uptake it as forms of phosphate and phosphate-containing nutrients from extracellular environments, and reserve extra phosphate to polyphosphate inside the cell. Among five phosphate transport systems, Pst plays central roles in phosphate transport, and its expression is coordinated by the regulation of PhoB-PhoR two component signal transduction system in response to extracellular levels of phosphate. Genomic studies on the response regulator PhoB reveal many genes independent of phosphate metabolism. Based on recent findings on phenotypes of bacteria lacking proper function of each phosphate transport system, this review discusses roles of phosphate transporters in maintaining optimum intracellular phosphate levels, and presents diverse phenotypes of phosphate transporters related with other environmental signals as well as phosphate, then finally points out functional redundancy among phosphate transport systems or their regulators, which emphasize importance of phosphate homeostasis in governing metabolism, adaptation, and virulence of bacteria.

• Proceedings of the Korea Concrete Institute Conference
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• 2008.11a
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• pp.469-472
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• 2008

As a general rule, concrete has higher compression strength than bending and toughness. but Ductile fiber reinforced cementitious composite has high toughness property owing to adding a large volume fiber. Therefore uniaxial tensile strength test is imperative to evaluate high toughness property of ductile fiber reinforced cementitious composite in comparison with general concrete test. but in testing compression strength, Result is different by factor of thickness, shape and edge condition. Uniaxial tensile strength test is affected by fiber's length and section area because of cementitious composite property and factor of fiber arrangement. This study evaluates toughness property of ductile fiber reinforced cementitious composite according to thickness and edge condition. The more thickness is thin, the more high performance by fiber arrangement

• The Journal of Korean Institute of Electromagnetic Engineering and Science
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• v.25 no.3
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• pp.357-364
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• 2014

In this work, we construct a CPU cluster to implement a parallel finite-difference time domain(FDTD) algorithm for fast electromagnetic analyses. This parallel FDTD algorithm can reduce the computational time significantly and also analyze electrically larger structures, compared to a single FDTD counterpart. The parallel FDTD algorithm needs communication between neighboring processors, which is performed by the MPI(Message Passing Interface) library and a 3-D domain decomposition is employed to decrease the communication time between neighboring processors. Compared to a single-processor FDTD, the speed up factor of a-CPU-cluster-based parallel FDTD algorithm is investigated for the normal mode and the hypermode and finally analyze an electrically large concrete structure by the developed parallel algorithm.

• Journal of the Korean Society of Costume
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• v.36
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• pp.53-75
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• 1998

The kind, the structure, and the motif of the Chosun dynasty's fabrics found mainfy within the Buddhist statues were studied. The total of 62 pieces of fabrice can be classified chronologically as follows ; 27 pieces in the year of 1431, 20 pieces of 1550, 9 pieces of 1664, and 6 pieces of 1735. These 62 fabrics also categorized by the weaving method as follows; 27 plain weaved, 17 twill weaved, 10 pieces of satine weaved, 7 pieces of Leno weaved, and 1 piece of double weaved fabrics. Most of the studied fabrics were silk, the rest were 2 pieces of yam and 1 piece of cotton, Kyun, Chu, and Cho were the plain weaved silk as Nung and Ki were the twill weaved silk, Satine weaved silk was called as Dan and double weaved silk was called Chikum in the Chosun dynasty. 1. The antique fabrics were composed of mainly silk. This is believed due to the utmost devotion to the buddhist statue as an object of worship. 2. In the fabric's structural point of view, th ecrossed 4-ply threads of warp yarn which is one of Leno weaved can be observed fre-quently in the period of Korea dynasty's fabrics. But it started to disappear in the beginning of Chosun dynasty, since only one piece of Ra could be found in the 1431's fabrics. Keum, one of the double weaved structure is assumed to be extinct from the Korea dynasty. Satin weaved fabrics started to be woven from the latter period of Korea dynasty and was very popular in Chosun dynasty. 3. The widths of fabrics in the Chosun dynasty gradually decreased compared with those of Korea dynasty.

• Journal of the Korean Society of Costume
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• v.59 no.10
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• pp.1-9
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• 2009

One piece of Jeogori and several books of the Goryeo dynasty were found inside of the wooden Buddhist Goddess of Mercy Statue of the Bogwang temple and they were designated as national treasure of Korea, No. 1571. The jeogori was the Jeogsam as the kind of underwear and conjectured as for women by considering its size. The collar of the jeogori was 3cm-wide square-shaped collar without gussit and the sleeve was close to straight line. Also the jeogori was designed without breast ties and could be adjusted by knot button. The fabrics for the jeogori showed similar pattern as complex silk gauze in 1302. It has not been reported yet that the complex silk gauze was used for the Jeogsam from Goryeo Dynasty to Joseon Dynasty. Comparing the Jeogori of the Bogwang temple to those of Goryeo Dynasty, it can be appropriately estimated as the remains of the Goryeo Dynasty since its shape and materials are very similar to those found in the Jeogori's of the Goryeo Dynasty and it was found between the books of the Goryeo Dynasty inside of the knee part of the wooden Buddhist Goddess of Mercy Statue of the Bogwang temple. Although only one piece of Jeogori was found, it's importance in cultural value or in the study of the fabric history cannot be underestimated considering the fact that the Jeogories of the Goryeo Dynasty are scarce, and that the used fabric was not commonly used complex silk gauze, and especially that this Jeogori is the only existing Jeogsam made of complex silk gauze.

• Journal of the Korean Society of Costume
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• v.58 no.1
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• pp.9-16
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• 2008

Six of the Imdang tombs containing remains with imprints of ancient fabrics and textiles were investigated. Within the tombs, a total of 120 pieces of imprinted fabrics and textiles were investigated, all of which belongs to $5{\sim}6C$ Shilla period. All of the hemp textiles examined exhibited similar characteristics found in ancient hemp textiles: they were woven by plain weave technique with s-twist threads. The examined silk could be categorized into plain woven silk, cho, and double woven brocade, all of them made with non-twisted threads and degummed silk. The density of the plain woven silk ranged from 39 threads to 144 threads. Cho was also found, which showed similar characteristics to those of Gaya and Bakjae tombs. One piece of 2/1 twill weave on plain ground and 12 pieces of double woven brocade were found and their average density was $97.4{\times}33.4/cm$ with denser warp than weft. The various thickness of the threads were observed in the examined plain braid. The silk with twining technique showed thicker warp than weft. This is similar to the techniques of fabrics found in the King Muryeoung's Tomb of the Bakjae period. Fabrics with the purple-like color were observed in the some of the double woven brocades and also on the plain woven silk imprinted on the remains. The purple-like color was revealed to be purple with a tint of violet. The two tombs from which the imprinted fabrics with purple-like color were found belonged to top-class social level of the Shilla period, which informs that the purple color was used exclusively for the people of higher social status. The floss silk was found between the double woven brocade and plain woven silk of the belt, which is an important evidence that the floss silk was used for stuffing in the early 6th century.

• The Journal of Korean Institute of Electromagnetic Engineering and Science
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• v.24 no.6
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• pp.623-632
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• 2013

Electromagnetic topology simplifies a complex analysis area in accordance with electromagnetic coupling. And then electromagnetic topology divides the simplified continuous area into sub-areas and analyzes electromagnetic problems at the sub-areas. Therefore electromagnetic topology has a merit to analyze the electromagnetic coupling in large and complex systems, however simplified modeling technique can generate large errors. In this paper, power balance method is used to estimate errors and subdivide junctions in the electromagnetic topology. The method is applied to analyze conducted and radiated electromagnetic coupling in two kinds of cavity models. Improvement of accuracy was accomplished in accordance with junction subdivision. Moreover we could save computation time and memory comparing with FDTD results.

• Journal of the Korean Society of Costume
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• v.58 no.5
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• pp.153-165
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• 2008

The methods used in determining the weaving period of the textiles comprises not only radiocarbon dating but also discrimination of the motif and the textile structure. This study surveys the variation of the structure and the characteristics of the patterned textile of the Joseon dynasty to determine the weaving period. The number of twill gradually decreased in the Joseon dynasty while satin weave became more popular and the non-patterned twill almost vanished after 1600 A.D. The patterned plain weave was started to weave from the beginning of the Joseon dynasty but this has been shifted to twill, satin weave, floated weave, or the textiles with combined techniques more than 2 kinds after 1800 A.D. For the twist of threads, the number of the fabrics with Z-twisted thread in the warp and the non-twisted thread in the weft showed peak in 1600 A.D. and gradually decreased afterward. After 1600 A.D., the textile without twist became general trend.The satin weave started to appear with the 5-end satin in the beginning of the Joseon dynasty but the 8-end satin started to appear from the middle of 17th century and got more popularity with time. At the same period, the patterned textile on the ground of the satin weaved with the different techniques from the earlier period started to appear. The twist of the satin in the 1600 A.D. showed similar trends as twill, this general trend resulted from the fact that the non-twisted thread in the weaving became more popular with the time at that period.