• Proceedings of the KIEE Conference
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• 2005.07b
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• pp.1150-1152
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• 2005

This paper deals with inductance profile of linear switched reluctance motor. Inductance profile of LSRM calculate at align and unalign position using magnetic equivalent circuit method. Magnetic equivalent circuit method of this paper used method of reference[3],[4], but this method used modification on account difference of design specification Also, analysis result compares with data that is derived through an experiment, and proved validity.

• Proceedings of the KIEE Conference
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• 2005.07b
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• pp.1153-1155
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• 2005

This paper deals with dynamic characteristics of LSRM according to drive condition. First, in experiment of LSRM, position of LSRM detected approximation sensor. Position choose mover of LSRM and inductance. When approved current in each phase by decided position, we made sure current and voltage according to turn-on, turn-off. Second, in dynamic characteristic of LSRM, through an experiment, we decided turn-on position of inductance profile. Also, we presented dynamic characteristic analysis model which is consisted at motor and sensor signal part, etc., and substitute circuit constant that get using magnetic equivalent circuit method, we confirmed current and voltage waveform.

• Korean Journal Plant Pathology
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• v.12 no.4
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• pp.432-436
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• 1996

역전사 중합효소 연쇄반응(RT-PCR)을 이용하여 담배(Nicotiana glutinosa)에 증식시킨 7종의 오이 모자이크 바이러스(CMV)를 검정하였다. RT-PCR을 위한 간단하고 신속한 바이러스 핵산의 조즙액 추출법이 개발되었으며, CMV 외피단백질 유전자 부위를 기초로 하여 제작한 20개의 염기로 구성된 primer를 사용하여 RT-PCR을 실시한 결과, 약 490 염기쌍의 DNA 단편들이 이병식물의 조즙액으로부터 증폭되었다. EcoRI 및 MspI을 이용한 RT-PCR 산물의 분석에 의하여, 공시한 7종의 바이러스는 모두 CMV subgroup I으로 동정되었다. Ouchterlony 한천젤 이중 확산법을 이용한 항혈청 검정에서도 7종의 바이러스 모두 CMV-Y의 항혈청과 단일의 침강선을 형성하였다.

• Proceedings of the Korea Multimedia Society Conference
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• 2002.05c
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• pp.1-5
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• 2002

본 논문에서는 UART(Universal Asynchronous Receiver-Transmitter)를 soft IP(Intellectual Property) 모듈 형태로써 VLSI 설계과정을 통하여 구현하였다. 이 모듈은 현재 각종 통신 디바이스에서 최하 말단에서 직렬 데이터를 시스템으로 받아들이거나 병렬 데이터를 직렬 라인에 실어 보내는 중요한 역할을 담당한다. 본 연구에서 설계한 UART는 간단한 모듈 형태로 제작되어 있어 Verilog-HDL을 사용하여 직렬 송ㆍ수신을 필요로 하는 시스템에 내장되어 사용될 수 있다. 본 논문에서는 설계 순서에 따라 UART를 설계하고 Simulation을 하고 Synopsys Tool을 사용하여 Compile 과 Synthesis 후 Gate Area 와 Belay를 검출해 내었다. 합성결과 0.25$\mu$m 공정의 CMOS Cell Library를 사용하였을 경우 전체 면적은 1,013 gate가 나왔다. 본 논문에서 설계한 UART의 최장경로가 최대 4.12ns로 나타났으며, 최대 동작 클럭 주파수는 200MHz 로써 150Mbps 이상의 전송 속도를 가진다.

• Journal of Animal Science and Technology
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• v.48 no.2
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• pp.227-236
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• 2006

Twenty four Hanwoo steers(average body weight=550.4±42.8kg) were used in the experiment to determine the effects of supplementing coated vitamin C+E with cottonseed on meat quality, meat color and carcass grade in Hanwoo steers fed brewers grain and cracked corn-based fermented feedstuff. Steers were randomly assigned to feeding groups of fermented feedstuff without any supplements(T1) and fermented feedstuff supplemented with coated vitamin C+E and cottonseed(T2). Ether extract content of longissimus dorsi was higher in T2 than in T1(p<0.05). Yellowness and hue-angle among surface colors of longissimus dorsi was lower(p<0.05) in T2 than in T1 but lightness was higher(p<0.05) in T2 than in T1. Ratio of yield grade ‘A’ was higher from T2 group than from T1 group. Marbling score was higher in T2 than in T1(p<0.05). Present results indicate that supplementation of coated vitamin C+E and cottonseed to brewers grain and cracked corn-based fermented feedstuff has positive effects on ether extract content, color, marbling score of longissimus dorsi in Hanwoo steers.

• The Journal of the Korea Contents Association
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• v.18 no.5
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• pp.343-356
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• 2018

The purpose of this study was to explore the domestic violence experience of military's spouses and its impacts on child abuse and child's growth retardation. Then, the social work interventions were identified to curtail domestic violence experience and its impact on family including their spouses and children. The primary data was collected in 2015 by interviewing two hundred thirty eight spouses of military personnels, the military service 3 unit, the navy service 2 unit, the airforce service 2 unit. The result showed that children of the military families experienced emotional abuse (51.4%), physical abuse (28.9%) and neglect (3.8%). And an association between childhood experience of abuse and perpetration of child abuse was found with a perfect mediation effect of family conflict. Based on the results, social welfare intervention program was suggested to reduce domestic violence among military families in South Korea.

• Journal of KIISE:Computer Systems and Theory
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• v.30 no.5_6
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• pp.319-323
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• 2003

Let P be a set of n points in the plane. A minimum spanning tree(MST) is a spanning tree connecting n points of P such that the sum of lengths of edges of the tree is minimized. A diameter of a tree is the maximum length of paths connecting two points of a spanning tree of P. The problem considered in this paper is to compute the spanning tree whose diameter is minimized over all spanning trees of P. We call such tree a minimum-diameter spanning tree(MDST). The best known previous algorithm[3] finds MDST in $O(n^2)$ time. In this paper, we suggest an approximation algorithm to compute a spanning tree whose diameter is no more than 5/4 times that of MDST, running in O(n$^2$log$^2$n) time. This is the first approximation algorithm on the MDST problem.

• Journal of Life Science
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• v.17 no.4 s.84
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• pp.498-502
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• 2007

A total of 5 female elk deer($220kg{\pm}10kg$) were included in a study on the changes in physico-chemical properties of deer meat during storage at $-4^{\circ}C\;and\;-2^{\circ}C$. The deers were exposed to normal pre-slaughter handling and put under anesthesia before slaughtered. The loin and leg cuts were deboned from the carcass after 24hrs slaughter. The samples weighing approximately 300g were packaged using wrap packaging and stored for 1, 2, 3, 4, 5 and 6 months at $-30^{\circ}C\;and\;-60^{\circ}C$. During the freezing period, the changes of moisture maintenance was slower for the meats kept at $-60^{\circ}C$ than that at $-30^{\circ}C$. The meat softness represented higher value after freezing, and it tended to be decreased with the passage of storage time. Comparing the values between freezing temperature, the value at $-30^{\circ}C$ was higher than at $-60^{\circ}C$. All meats frozen at $-30^{\circ}C\;and\;-60^{\circ}C$ were edible after storage for 6 months. Loin was inedible, and leg was edible after freezing storage for 6 months. The pH values of the meats were increased during freezing period, even though pH value of the meats stored for 6 months was less than 5.70. Luminosity of loin was significantly increased with the passage of storage time, although loin stored at $-60^{\circ}C$ was darker, and leg stored at $-30^{\circ}C$ was darker. The index of red color was rapidly decreased for loin stored at $-30^{\circ}C$, and for leg stored at $-60^{\circ}C$, respectively. There were no changes in the index of yellow color for loin stored at $-60^{\circ}C$, and the index for leg was increased with regardless of the freezing storage temperature after 6 months.

• Korean Journal of Organic Agriculture
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• v.30 no.2
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• pp.279-290
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• 2022

This study was conducted to find out that winter green manure crops could be efficient replacements of expeller cake fertilizers, which were mostly imported, on environment-friendly red pepper production. Four treatments were compared under the condition of plastic film house: 1) barley (B); 2) hairy vetch (HV); 3) mixtures of barley and hairy vetch (B/HV); 4) expeller cake (EC). Total nitrogen content in hariy vetch was 3.6%, which was higher than 1.5~1.8% in barley and mixtures of barley and hairy vetch. P₂O₅ and K₂O contents were similar in all green manures. Supplying amount of nitrogen from B, HV and B/HV plot, which were 172 kg ha^-1, 193 kg ha^-1, and 198 kg ha^-1, were higher than amount of basal nitrogen required by soil testing but were lower than that of total nitrogen, respectively. Among the green manure crops, C/N ratio of HV was the lowest at 11.8, showing a similar value to that of expeller cake, but that of B was the highest at 30.6. Total yield was no significant difference in all treatment plots although B/HV plot showed the highest yield, but initial yield in B plot with high C/N ratio was lower than that in EC plot.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2017.11a
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• pp.79-85
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• 2017

It is critical that passengers should be given timely and correct escape or evacuation guidance from captain and crews when there are hazardous situations in a ship. Otherwise the consequences could be disastrous as "SEWOL Ferry" the South Korean passenger ship which sank in southern coastal area on 16th April 2014. Due to the captain's delayed evacuation decision and lack of sufficient number of crews to guide passengers' evacuation, the accident recorded many casualties, most of whom were high school students (302 passengers sank down with the ship while 172 rescued). Building a passenger ship with well-designed physical escape routes is one thing and guiding passengers to those escape routes in real disaster situation is another. Passengers get panic and move to a wrong direction, bottleneck makes situation worse, and even crews get panic also - passive static escape route signage and small number of trained crews might not be enough to take care of them. SESS (Smart Escape Support System) is being developed sponsored by South Korea Ministry of Ocean and Fisheries starting from 2016 with 4 years of roadmap. SESS comprises multiple active dynamic signage devices which communicate with real-time escape routing server software via LoRa (Long Range) proprietary wireless network.