• 한국산학기술학회논문지
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• 제8권6호
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• pp.1465-1479
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• 2007

본 연구에서 우리나라 물류기업들은 유비쿼터스(Ubiquitous)환경을 고려한 물류정보시스템 활용의 각 주요변수들(기업환경, 기업전략, 기업정책, 물류정보시스템)이 기업성과에 기여할 것으로 가설을 설정하고 기업성과에 영향을 미치는 각 변수간의 관계를 실증적으로 검증하였다 각 주요변수간의 분석결과를 요약하면 다음과 같다. 첫째 유비쿼터스 환경을 고려한 각 주요 변수 중 기업환경은 기업성과에 밀접한 영향을 미치며, 둘째 주요 각 변수인 기업환경, 기업전략, 기업정책들은 각 변수 서로 간에 유의한 반면 물류정보시스템은 유의하지 않았다. 그러나 기업성과는 기업환경과 기업정책만이 유의함을 알 수 있었다. 결론적으로 기업성과는 기업전략, 기업정책, 물류시스템의 주요변수들 각각에 의해서 얻어지는 결과가 아니라 기업전략, 기업정책, 물류정보시스템의 여건을 아우르는 기업환경에 의해서만이 기업성과에 영향을 미친다는 사실을 확인할 수 있었다.

• 한국멀티미디어학회논문지
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• 제23권7호
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• pp.830-839
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• 2020

As a popular mathematical framework for modeling decision making, Markov decision process (MDP) has been widely used to solve problem in many engineering fields. MDP consists of a set of discrete states, a finite set of actions, and rewards received after reaching a new state by taking action from the previous state. The objective of MDP is to find an optimal policy, that is, to find the best action to be taken in each state to maximize the expected discounted reward of policy (EDR). In practice, MDP is typically unknown, so simulation-based policy improvement (SBPI), which improves a given base policy sequentially by selecting the best action in each state depending on rewards observed via simulation, can be a practical way to find the optimal policy. However, the efficiency of SBPI is still a concern since many simulation samples are required to precisely estimate EDR for each action in each state. In this paper, we propose a method to select the best action accurately in each state using a small number of simulation samples, thereby improving the efficiency of SBPI. The proposed method accumulates the simulation samples observed in the previous states, so it is possible to precisely estimate EDR even with a small number of samples in the current state. The results of comparative experiments on the existing method demonstrate that the proposed method can improve the efficiency of SBPI.

• 원예과학기술지
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• 제30권3호
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• pp.243-249
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• 2012

Hexokinase is the first enzyme in the hexose assimilation pathway; it acts as a sensor for plant sugar responses, and it is also important in determining the fruit sugar levels. The full-length cDNA of a hexokinase gene was isolated from loquat through reverse transcription polymerase chain reaction (RT-PCR) and rapid amplification of cDNA ends, which was designated as EjHXK1. EjHXK1 is 1,839 bp long and contains an entire open reading frame encoding 497 amino acids. The predicted protein of EjHXK1 shares 72%-81% similarity with other plant hexokinases. Phylogeny analysis indicated that EjHXK1 is closely related to maize and rice hexokinases. Transient expression of the 35S: EjHXK1-GFP fusion protein was observed on the cell membrane and cytoplasm. Real-time RT-PCR indicated that EjHXK1 is expressed in loquat leaves, stems, flowers, and fruits. EjHXK1 transcripts were higher during early fruit development, but decreases before maturation, which is consistent with hexokinase enzyme activity during fruit development and conducive for hexose accumulation in mature fruits. These results imply that EjHXK1 may play important roles in the regulation of sugar flux during fruit ripening.

• 한국재료학회지
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• 제14권12호
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• pp.835-839
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• 2004

The diamond thin films was deposited on Si(100) substrate by Hot Filament Chemical Vapor Deposition (HFCVD) method using supplied the $CH_{3}OH/H_{2}O$ mixtured gas with excess H_{2} gas. The role of hydrogen ion as the growth mechanism of the diamond deposit was examined and compared the $CH_{3}OH/H_{2}O$ with the $CH_4/H_2$. Pressures in the range of $1.1\sim290{\times}10^2$ Pa were applied and using $3.4\sim4.4$ kw power. It was investigated by Scanning Electron Microscopy(SEM) and Raman spectroscopy The H ion was etching the graphite and restrained from $sp^3\;to\;sp^2$. But excess $H_2$ gas was not helped diamond deposit using $CH_{3}OH/H_{2}O$ mixtured gas. It was shown that the role of hydrogen ion of deposited diamond films using $CH_{3}OH/H_{2}O$ was different from $CH_4/H_2$.

• 대한지역사회영양학회지
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• 제13권6호
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• pp.829-839
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• 2008

The purpose of this study was to investigate the relation of the fast food and beverage intake on sociality and anger expression of adolescents. Questionnaires were distributed to the adolescents of 599 middle and high school students in Busan. According to the results, the preference-intake frequency analysis (PEA) on fast food grid, high preference and high intake frequency were 'dukbokki', 'chicken' and 'mandu' and low preference and high intake frequency were 'ramyon', 'gimbab. PEA on beverage grid, high preference and high intake frequency were 'milk-dairy product', 'fruit juice', 'isotonic beverage' and low preference and high intake frequency were 'carbonate drink'. The intake frequency of 'pizza', 'sandwich', 'udong', and 'dukbokki' had a positive relationship with sociality. 'Hamburger', 'chicken', 'french fry', 'gimbab', 'mandu', and 'ramyon' showed a positive relationship with anger-out. The intake frequency of 'carbonated drink' had a negative relationship with anger-control, but 'green tea' showed a positive relation with it. 'Carbonate drink', 'isotonic beverage', 'coffee', and 'milkshake' had a negative relationship with anger-out. The explanation power ($R^2$) of intake of fast food and beverage on sociality was $0.019{\sim}0.038$, and 'carbonated drink' and 'coffee' had a negative influence on sociality. The explanation power ($R^2$) of intake of fast food and beverage on anger expression was $0.011{\sim}0.041$, and 'carbonated drink' had a negative influence on angercontrol. 'Hamburger', 'carbonated drink', and 'coffee' showed a positive influence on anger-out. From these results, it was necessary to develop the practical eating-out habits program on proper fast food and beverage choice for adolescents.

• 한국통신학회논문지
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• 제25권6A호
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• pp.839-847
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• 2000

최근 전송용량의 증대 및 가입자 수용용량의 증대에 따른 초고속 가입자선로 구현의 한 방안으로서 디지털가입자라인의 도입이 국내외적으로 추진되고 있는 실정이다. 이에 디지털가압자라인에 대한 국내표준화가 이루어지고 있지만, 이에 대한 성능분석은 주로 측정에 의한 실험치에 국한되고 있다. 따라서 본 연구에서는 이론해석과 시뮬레이션 기법 등을 제시하여 디지털가입자라인의 S/N 성능 및 BER 성능 등을 분석하였으며, 특히 S/N 성능으로부터 채널용량을 구해 일본에서 측정된 실험치와 비교하였다. 본 해석결과 이론치는 측정치의 상한 및 하한의 중심에 놓여 그 타당성이 입증되었으며, S/N성능은 정송길이가 길어지면 원단누화의 영향보다는 가우스잡음에 의해 지배적이고, 주파수가 높아지거나 전송거리가 길어짐에 따라 BER 성능은 상당히 열화함을 알 수 있었다. 한편, 본 해석의 결과는 향후 국내 디지털가입자라인의 표준화 제정에 기본적인 데이터로서 활용될 수 있을 것이다.

• 한국의류학회지
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• 제33권5호
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• pp.827-839
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• 2009

Sizing system of Korean structural firefighting protective clothing that is national approved should be met for specification of structural firefighting protective clothing that is identified by Ministry of Public Administration and Security(MOPAS). However if you look over the specification of sizing system, the standard is based on only 'height' and the others are indicated as the size of completed product. KS K ISO 13688 and EN 340 which is met on ISO 13688 which indicates sizing system about protective clothing has the standards of height, chest and waist circumference. Also NFPA 1971 that has standards of sizing system is based on chest circumference, cervical to wrist length, waist circumference and inseam. That is different from Korean standards. Therefore, fire fighting protective clothing standards which is based on only height should be compensated and not be relied on foreign standards like ISO. It is indispensable for developing our own sizing system of structural fire fighting protective clothing. In this studying, Korean new sizing system of structural fire fighting protective clothing was developed for providing basic information of ergonomic structural fire fighting protective clothing. The analyzed target age was between 20 and 59 years old fire fighter who extinguish the fire. And it was analyzed by 3D measurement among data of the $5^{th}$ Size Korea. On conclusion, in case of structural fire fighting protective clothing coat, physical dimension was to be chest circumference, cervical to wrist length. Three dimensions as 5cm space of circumference and four dimensions as 2.5cm space of cervical to wrist length were derived, which means that totally 12 dimensions were defined. Dimension standards of pants was based on the analysis of waist circumference and crotch height. Six dimensions as 5cm space of waist circumference and three dimensions as 5cm space of crotch height were derived, which means that totally 14 dimensions were defined.

• Archives of Plastic Surgery
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• 제37권6호
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• pp.839-842
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• 2010

Purpose: Ganglion cysts of peripheral nerve are uncommon. Ganglion cysts located within the nerve and extraneural ganglia that cause symptomatic nerve compression have been reported. We report an unusual case of epineural ganglion cyst confined to the epineurium of the sural nerve at the foot. Methods: A 45-year-old woman was referred because of a mass on the foot. She had six months' history of pain and numbness in the right small toe. During the examination of the lesion, multinodular cystic mass was identified arising from the epineurium of the sural nerve. The nerve fascicles were compressed by the cyst, but the cyst wall clearly did not invade the fascicle. With the aid of surgical microscope, the epineural cyst was completely excised along with epineural tissue to which it was attached, and the sural nerve was decompressed. There was no relationship between the cyst and either the joint capsule or tendon sheath. Since the cyst was on the periphery of the nerve it was possible to remove the cyst intact without damaging the underlying fascicles. Results: The postoperative course was uneventful. Pathologic examination showed a ganglion cyst with a degenerated collagen fibers and contained a yellowish, jelly-like mucinous substance. No neural elements were identified within the cystic wall. Her sensory impairment improved progressively. At the 15 months follow-up, she was asymptomatic with no neurological deficits. Conclusion: Rarely, ganglion cysts can involve peripheral nerves, leading to varing degrees of neurological deficits. Intraneural intrafascicular ganglion may be difficult to separate from the neural elements without nerve injury. Epineural ganglion, subcategorized as intraneural extrafascicular ganglion, can be removed without damage to the underlying nerve.

• 정보과학회 논문지
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• 제42권7호
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• pp.834-839
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• 2015

개인의 건강과 삶의 질의 향상을 위해 웰니스에 대한 사람들의 관심이 증가하고 있다. 개인의 건강 데이터 분석을 위해 체중, BMI, 혈압과 같은 신체 측정 데이터를 사용하거나 일상생활의 식사 기록이나 운동량 기록으로 축적된 데이터를 사용한다. 축적된 건강 데이터는 개인이 가진 잠재적인 질병을 예측하거나 식사 또는 운동 패턴의 분석이 가능하다. 식품 영양학 분야에서는 여러 명의 식이 데이터와 건강정보를 설문을 통해 수집하여 입력 데이터에 대한 하나의 가설을 세우고 여러 통계 분석을 통해 가설을 검증하는 방식으로 데이터 분석 실험을 진행한다. 한편, 과학자들의 실험의 편리성을 위한 문제풀이환경에 대한 연구가 활발히 진행되고 있다. 본 논문에서는 식품 영양학적으로 식이 데이터 분석의 효율적인 실험환경을 위한 문제풀이환경을 설계한다. 제안된 문제풀이 환경은 반복적인 실험 단계를 자동화하고 순차적인 작업을 병렬 수행 가능하도록 분산 컴퓨팅 환경에 배치하여 전체 실험의 속도를 높인다.

• 한국방사선학회논문지
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• 제15권6호
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• pp.833-839
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• 2021

한반도 비핵화 가능성이 언급되고 있는 상황에서 지리적, 언어적 이점을 고려할 때 한국의 역량을 키워 비핵화 검증에 참여 의지를 나타낼 필요가 있다. 문헌 조사를 통해 북한의 비핵화 대상 시설의 정보 및 현황을 파악하고 주요 비핵화 대상 시설이 위치한 영변 핵단지의 기후 환경, 지리 특성, 교통 여건 등 환경 분석을 수행하였다. 또한, 주요 비핵화 대상 시설인 영변 핵단지의 비핵화 검증을 위한 인력 및 기기의 운반을 위한 시나리오 개발을 위한 접근성 분석을 수행하였다. 접근성 분석은 항공, 항만, 차량 운반으로 구분하여 수행하였으며, 경로별 거리, 예상 소요시간, 경유 도로 등을 분석하였다. 이 과정에서 차량 운반 시나리오의 적합성을 확인할 수 있었으며, 운반 과정에 영향을 미칠 수 있는 인자들과 북한의 상세 도로 현황을 확인하였다. 후속 연구를 통해 최적의 운반 시나리오를 개발하고자 한다.