• 한국연초학회지
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• 제29권2호
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• pp.98-103
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• 2007

This study compares menthol migration from fillers to filters and mainstream smoke in a type of leaf tobacco and according to the moisture content differences at the range of $11{\sim}15\;%$. The leaf tobacco used in this study consisted of Korea flue cured upper leaves B1O (KFUB1), A40R (KFUA4), lower leaves C1L (KFLC1), CD4L (KFLCD4), burley upper leaves A3T (KBUA3), lower leaves D3W (KBLD3), Orient Basma I/III (OB), Orient Izmir BIG (OI), expanded tobacco (KET), and reconstituted sheet (KRC). Menthol migration to the filter and mainstream was measured under constant conditions for 80 days with intervals of 20 days. In the comparison between flue cured types, there were significant differences in the filter parts, as follows. KFUB1(34.4 %) KFUA4(37.4 %), KFLC1(43 %) and KFLCD4 were 55.7 %. In the comparision between other types of leaf tobaccos, KFUB1 was 34.4 % and KET was 52.6 % at filter parts. In the methol transfer to mainstream smoke was $16.5{\sim}24.2\;%$. The menthol migration to filters was measured based on the moisture content of $11{\sim}15\;%$ for the KFUB1 after storing it for 80 days. The menthol migrations were $36{\sim}40\;%$ at the moisture content of $11{\sim}15\;%$, respectively. The transfers to mainstream smoke were $12.8{\sim}15.8\;%$.

• Journal of Biosystems Engineering
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• 제12권4호
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• pp.9-15
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• 1987

The vibrational characteristics of a radial-ply (155SR13 4PR) and a biased-ply tire (6.15-134PR) were investigated for examining the effects of tires with different structure on the ride characteristics of the vehicle. The natural frequencies at the tread band, mode shapes, and damping factors of two tires at the state of plane vibration were determined experimentally. The test work was performed at four levels of the inflation pressure, ranging from 171.7 kPa to 245.2 kPa, and three levels of the vertical load, deviating by 10% from the standard load designated by the Department of Transportation of the United States of America. The following results were drawn by the analysis of the test results: 1. The first-order natural frequencies of the radial-ply and the biased-ply tires at the tread band were 112 Hz and 159 Hz, respectively, at the state o f the free vibration when the inflation pressure of 196.2 kPa was applied. It was known that the biased-ply tire has higher resonant frequency than the radial-ply tire and the natural frequencies of the both tires move to the high frequency range as t he inflation pressure is increased. 2. The vibration modes of both tires were quite different. No big difference in mode shapes was examined as the inflation pressure was increased. But the natural frequencies of two tires were changed. For the radial-ply tire, no difference in mode shape was found whether the vertical load was applied or not. But a significant difference in mode shape was examined for the biased-ply tire. 3. Any difference was not found in damping factor as the different inflation pressures were applied. 4. When no vertical load was applied, damping factors of the radial-ply and biased-ply tire at the state of the natural vibration ranged from 2.6 to 5.9%, and from 4.1 to 7.8%, respectively. It was estimated that the radial-ply tire would have better cushioning than the biased-ply tire since the vertical spring rate of the radial-ply tire was much less than that of the biased-ply tire, even though the damping effect of the radial-ply tire was smaller than that of the biased-ply tire.

• 한국의류학회지
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• 제35권3호
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• pp.371-384
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• 2011

This study with 'trip' as a theme, aims to develop textile designs and fashion bags for travel which is widely applicable fitting traveler's T P O, applying Victor Vasarely's artwork. During the planning process of design, 'Whenever & Wherever's concept was set by analyzing fashion trend information in 2010-11 F/W proposed by Interfashion Planning and FCK; in addition, 'Bobos' were selected as research targets. It organized 4 images of 'Modern', 'Romantic', 'Classic' and 'Fantastic'. The motives are proposed textile design with '$Cross^2$', 'Falling Z', 'Cir-Classicism' and 'Skinny-holic' per each theme. The designs developed were printed out and into polyester canvas with a Polaris V6 DTP from dgen, Corp. Textile designs developed were applied for 'two-way' formed fashion bags for traveling with high practicality. Fashion bags for traveling consisted of big bags, tote bags, and hip sacks; a total of 12 works (4 sets per theme) were produced. This study sought practical plans for artworks by producing fashion goods through a DTP system. The results of this study can be used as guidelines for further studies and as a significant contribution to the creation of high values for exciting fashion products.

• 인터넷정보학회논문지
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• 제7권6호
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• pp.51-62
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• 2006

기존의 다른 어떤 종류의 게임보다도 큰 부하와 거대한 하나의 가상월드가 MMORPG(Massively Multiplayer Online Role-Playing Game)의 중요한 특징이다. 이러한 Seamless 환경에서는, 독립된 게임 서버들이 관리하는 하위의 공간들을 모아 하나의 거대한 가상 월드로 구축한다. 게임 개발자들의 노력에도 불구하고 게이머들은 여전히 클라이언트와 서버, 필드 서버들 간의 상호작용에서 비롯된 과다한 메시지 트래픽에 대해 불만을 가지고 있다. 본 논문에서는 메시지 트래픽을 줄이기 위해 MigAgent를 이용한 새로운 게임 서버 구조를 제안한다. 일반적으로 PC(Player Character)가 다른 필드 서버로 이동할 때 발생하는 메시지 트래픽이 최고조에 이른다. MigAgent는 이런 PC들을 처리하고 예기치 못한 상황에 대처하기 위한 에이전트 역할을 수행한다. 관심영역과 인접 셀의 크기 비율에 따라 그 효과를 분석함으로써 이 시스템의 효과를 분석한다.

• Korean Journal of Acupuncture
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• 제28권1호
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• pp.157-169
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• 2011

Objective : Nine classical needles have been recorded in oriental medical classics as a diversified instrument for acupuncture to treat patients with various symptoms. Recently, it has suggested that doctors didn't make full use of acupuncture and that poor understanding of the nine needles has caused the lack of usage. Methods : It has studied bibliographically about the conformation including a length & shape and application & usages of the nine classical needles presented in oriental medical classics. Results : Chamchim (shear needle) has 1.6 chon (寸) length, sharp apex treating fever in the head and trunk; Wonchim (roun-pointed needle) has 1.6 chon, eggshaped apex treating disease of flesh by massaging with it; Sichim (spoon needle) has 3.5 chon, thick body with round sharp apex treating weakness of Qi; Bongchim (lance needle) has 1.6 chon, a triangled apex treating chronic disease with bleeding; Pichim (stiletto needle) has 4 chon, razor sharp applying to surgery of big pus; Wonlichim (round-sharp needle) has 1.6 chon, thin body, sharp apex treating acute arthralgia syndromes; Hochim (filiform needle) has various lengths which treats various disease of meridians and organs; Jangchim (long needle) has 7 chon, sharp apex treating chronic arthralgia syndromes in deeper place of body; Daechim (large needle) has 4 chon, nail like apex applying to excrete artheredema in joints. Conclusions : The conformation of nine classical needles has been changed from those recorded in oriental medical classics since it was developed. However, the usage of nine classical needles has remained the same. Therefore it is considered that intrinsic attribute of the nine needles has preserved even though the conformation of nine classical needles has changed.

• 산업경영시스템학회지
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• 제37권4호
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• pp.106-115
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• 2014

Until now, because a new product (or facility) launched in market has been retired from one year of age, we can have had ASL by stub-curve method by Iowa curve. Recently, many innovative products with important role in market like display and solar-cell etc. are more durable and, what are better, they have the constant variance in ASL because of their good quality. Of course, there are some ones like smart mobile phone with relatively big dispersion in ASL. Estimating ASL of products like display and solar-cell etc., the new approach is needed. In this paper a new method applied traditional Iowa curve with accelerated reliability test (indoor/outdoor) etc. is proposed.

• 대한전자공학회논문지
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• 제12권4호
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• pp.28-34
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• 1975

텔레비젼 수신용 안테나로써 가장 널리 사용되고있는 Yagi안테나는 구조가 간단하고 지향성 이득등이 좋으나 방사주파수에 대한 반파장길이의 소자를 사용하므로 칫수가 커지고 주파수대역이 좁다. 따라서 설치 취급등에 불편을 느낄 경우가 많다. 한편 최근 일반적으로 아무곳에서나 용이하계 설치할 수 있을만큼 소형이면서 화질이 좋은 수상이 가능한 수신안테나에 대한 요망이 커지고 있는데 본 연구에서는 그 파장에 비해서 소형인 폴디드·다이폴 안테나 소자 2개를 좁은 간격으로 배열하고 이들을 이상결합하므로써 VHF텔레비젼전파의 고채널 주파수대에서 비교적 양한 단일지향성을 얻고 있다. 본 안테나에 능동소자를 이용한 저잡음광대역증폭기를 삽입한다면 다소자 Yagi안테나에 비나될 전후방비를 갖는위에 그의 이득도 크게 증가되어 일반수상안테나로 뿐만 아니라 고우스트 방지용실내안테나로서 상당한 기여틀 할것으로 생각된다. The Yagi antenna, which is most widely used for television receiving, has simple form and good directiyity as well as high gain, but it must be made with linear elements of half wave length. Therefore, the dimension of multi-element Yagi antenna becomes bulky and so a(ten it is inconvenient to install and handle, because of its big size. Moreover the frequency band width of the Yagi antenna is usually not broad enough to cover the total frequency range of VHF TV channels in our country. Recently, the aemand for an antenna which is not only small enough to install it easily anywhere but also assures good quality of pictures is generally increasing. In this study 2 elements o( folded dipole, which is small compared to its electrical ways length, are fixed parallel to each other with a narrow distance and the emfs induced in them are made to get together with some phase difference. This new phased array antenna has shown a relatively good unidirectivity through over the high channel VHF television frequency hand as well as the good PIB ratio which is comparable to that of multielements Yagi antenna. As a result this new antenna will be used as a VHF high channel TV receiving antenna and it may become better antighost antenna when used inside the room than other room antennas.

• 한국재료학회:학술대회논문집
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• 한국재료학회 2009년도 춘계학술발표대회
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• pp.38.1-38.1
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• 2009

Plasma etching is an essential process for electronic device industries and the particulate contamination during plasma etching has been interested as a big issue for the yield of productivity. The oxynitride glasses have a merit to prevent particulate contamination due to their amorphous structure and plasma etching resistance. The YSiAlON oxynitride glasses with increasing nitrogen content were manufactured. Each oxynitride glasses were fluorine-plasma etched and their plasma etching rate and surface roughness were compared with reference materials such as sapphire, alumina and quartz. The reinforcement mechanism of plasma etching resistance of the YSiAlON glasses studied by depth profiling at plasma etched surface using electron spectroscopy for chemical analysis. The plasma etching rate decreased with nitrogen content and there was no selective etching at the plasma etched surface of the oxynitride glasses. The concentration of silicon was very low due to the generation of SiF4 very volatile byproduct and the concentration of aluminum and yttrium was relatively constant. The elimination of silicon atoms during plasma etching was reduced with increasing nitrogen content because the content of the nitrogen was constant. And besides, the concentration of oxygen was very low on the plasma etched surface. From the study, the plasma etching resistance of the glasses may be improved by the generation of nitrogen related structural groups and those are proved by chemical composition analysis at plasma etched surface of the YSiAlON oxynitride glasses.

• 한국응급구조학회지
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• 제1권1호
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• pp.71-86
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• 1997

This study is to suggest some developmental policies by analyzing the activities of first aid party in Kwangju and Chonnam regions for two years from Jan. 1, 1991 to the end of December, 1995. First, the residents in Kwangju and Chonnam regions have the sufficient benefits of emergency medical center, but it will be desirable that general hospital should be established and managed in Kohung peninsula which forms the wide island area far away from big cities. Second, the classification of the degree of severe case in the field by rescue members should be strengthened as the means which can reduce the number of patients transferred to the emergency room and the legal method which rescue members can select the medical agency. Third, children less than 10 are most frequent emergent patients and it is due to parent's indifference and children's in sensibility to safety. So the safely education in the course of infant and elementary education should be strengthened and the method which can keep the self safety through the legal system. Fourth, to increase the rate of emergency measure by rescue members, the reasons of fail of emergency treatment are suggested, the treatment results of each rescue member are analyzed every year and it is desirable that the system which can evaluate the personal ability should be introduced. Fifth, the medical accidents occurred in the case of medical act, by rescue members must lake the legal responsibility, but such a problem can he solved with the compensation of insurance system by government. Sixth, to reduce the time required for transfer, traveling service system for the fixed period in beach should be complemented and extended more and service system at ordinary times should be examined at mountains, the area of traffic jams and large special industrial park. Seventh, since service system with one team of two members of 119 rescue party in expressway cannot be mobilized when multiple accidents occur at the same time, it is considered that service system of two teams of four members should be extended. Eighth, first-aid service in expressway is conducted with rescue and emergency treatment by the rescue party at the same time, but the professional rescue lacks and it may result in the injury of patients. Therefore the creation of rescue party in expressway is the urgent problem.

• 한국표면공학회지
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• 제53권6호
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• pp.351-359
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• 2020

Formation behavior and properties of PEO (Plasma Electrolytic Oxidation) film on AA2024 were investigated under application of pulsed current as a function of Na3PO4 concentration in 0.05 M Na2SiO3 solution by analyzing voltage-time behavior, in-situ observation of arc generation, observation of surface morphology and measurements of thickness and surface roughness. Arc generation voltage decreased with increasing Na3PO4 concentration. Color difference of PEO films between edge and inner part disappeared by addition of Na3PO4. It was also observed that size of nodules on PEO film decreased with increasing Na3PO4 concentration. Thickness of PEO films formed on AA2024 increased with increasing Na3PO4 concentration. Whereas, surface roughness of PEO films decreased with increasing Na3PO4 concentration up to 0.05 M of Na3PO4 which is attributed to the deceased size of nodules on the PEO films. However, the surface roughness increased with increasing Na3PO4 concentration more than 0.07 M of Na3PO4 which seems to be due to the formation of non-uniform PEO films with smooth surface and large size pores formed by orange-colored big arcs. The experimental results suggest that added sodium phosphate less than 0.2 M in an alkaline silicate solution can contribute to the formation of relatively thick and uniform thickness of PEO films under arc generation voltage lower than 300 V.