• 한국구조물진단유지관리공학회 논문집
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• 제15권4호
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• pp.175-184
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• 2011

구조용 형강을 사용하는 격자형 합성바닥판은 비교적 신속한 시공과 보수시 교통통제를 최소화할 수 있는 장점으로 인해 1930년대 이후 현재까지 다양한 단면상세가 연구개발 되고 있다. 강형의 상부 일부만 콘크리트와 합성된 형태를 취하는 격자형 합성바닥판은 강형이 완전히 매입되는 형태에 비해 자중이 작고 공장에서 프리캐스트 제작이 가능하여 원거리의 현장이나 산악지역과 같이 건설조건이 열악한 경우에도 적용이 가능한 구조이다. 본 연구에서는 형강이 노출된 격자형 강합성 바닥판을 각종 기반시설물의 수평지지구조에 적용하고자 형강과 콘크리트의 합성을 위한 전단연결부의 형식과 격자형 구조에서 형강을 서로 연결하는 가로막대의 간격, 상부 콘크리트 슬래브의 두께 등을 변수로 휨실험을 하였고, 휨성능 및 합성거동을 비교 평가하였다. 이를 통해 설계변수 변화에 따른 구조거동의 변화를 비교 검토할 수 있었고, 적절한 전단연결방식 및 단면제원에 대한 기본자료를 얻을 수 있었다.

• 한국자원식물학회:학술대회논문집
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• 한국자원식물학회 2001년도 The 8th International Symposium
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• pp.20-33
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• 2001

A major portion of drugs used in Ayurvedic system of medicine which has been practiced since the early human civilization in Indian subcontinent were of plant origin. It should be noted that 70% of the population in this region depends on Ayurveda for their medical treatment and 60% of the drug resources are obtained from the Himalayan region. Therefore, Nepal becomes a potential source of plant drug resource since it occupies a major portion of the Himalaya. In the present paper, in general a current status of medicinal plant resources of Himalayan region especially Nepal will be discussed. In addition to this, a typical example of antidiabetic activity of Shilajit will be taken for the discussion. Shilajit is one of the crucial elements in several formulations including those of Rasayana, a therapy in Ayurveda, which has been practiced in the prevention of ageing and mental disorder. Although, Shilaiit is widely used for the treatment of diabetes, no satisfactory scientific reports are available up to now. The crude Shilajit in the market is a dark brown or black rock-like substance collected from the Himalayan region with a strong smell of cow's stale urine. In our studies, Shilajit (collected in the central Himalayan region) prevented the diabetes in nonobese diabetic (NOD) mice model. Shilajit also prevented the diabetes in the rats against the action of multiple low-dose (10 ㎎/㎏, i.v., 5 times) of streptozotocin. On the other hand, Shilajit did not show antioxidative activity. The preventive action of Shilajit on diabetes is mainly focused on the Th1 and Th2 cell activities, since Th2 cells activity was found to be significantly upregulated. Shilajit, however, showed a mild action in controlling the blood sugar level in young, old, and mild diabetic rats, but not in the severe diabetic rats. It also stimulated the nitric oxide production in macrophages. Based on these evidences, the antidiabetic activities of Shilajit appear to be immunomodulative probably by protecting or strengthening insulin-producing b-cells In the pancreas. further systematic research on constituents of Shilajit and its quality evaluation is necessary to enable the use of natural medicines in the treatment of diabetes.

• 한국공간구조학회논문집
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• 제23권2호
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• pp.29-36
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• 2023

Reinforcement learning (RL) is widely applied to various engineering fields. Especially, RL has shown successful performance for control problems, such as vehicles, robotics, and active structural control system. However, little research on application of RL to optimal structural design has conducted to date. In this study, the possibility of application of RL to structural design of reinforced concrete (RC) beam was investigated. The example of RC beam structural design problem introduced in previous study was used for comparative study. Deep q-network (DQN) is a famous RL algorithm presenting good performance in the discrete action space and thus it was used in this study. The action of DQN agent is required to represent design variables of RC beam. However, the number of design variables of RC beam is too many to represent by the action of conventional DQN. To solve this problem, multi-agent DQN was used in this study. For more effective reinforcement learning process, DDQN (Double Q-Learning) that is an advanced version of a conventional DQN was employed. The multi-agent of DDQN was trained for optimal structural design of RC beam to satisfy American Concrete Institute (318) without any hand-labeled dataset. Five agents of DDQN provides actions for beam with, beam depth, main rebar size, number of main rebar, and shear stirrup size, respectively. Five agents of DDQN were trained for 10,000 episodes and the performance of the multi-agent of DDQN was evaluated with 100 test design cases. This study shows that the multi-agent DDQN algorithm can provide successfully structural design results of RC beam.

• 한국엔터테인먼트산업학회논문지
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• 제5권2호
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• pp.77-86
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• 2011

본 논문은 커뮤니티를 주된 목적으로 하고 있는 SNG(Social Network Game)에 대한 사용자의 행동과 그 선택적 행동을 유발하는 동기와의 연관관계를 분석하고 있다. 게임제작기술에 대한 연구 및 활용에 비해, 게임 사용자에 대한 연구는 미비했으며 그 주제 또한 게임의 특정목표(예를 들면, "전투"를 통한 레벨상승 및 보상)수행에 대한 사용자의 행동유형을 관찰하는 데 그치고 있다. 따라서 SNG 게임사용자 행동을 문제해결 방식의 관점에서 접근하는 것이 아니라, 인간의 다양한 동기로 인한 행동의 선택 관점에서 연구할 필요가 있다. 이를 위해 첫째, 사회적 속성으로써 Lazzaro의 people fun 모델과 SNS(Social Network Service) 사용자의 동기이론에 대해 고찰한다. 둘째, SNG 13종에 대한 분석 자료를 수집하고 게임이벤트와 사용자의 기능적 행동(functional actions)을 분류한다. 셋째, 분류된 자료를 근거로 SNG 사용자의 주된 행동을 8종류로 설정하고 동기-행동 패턴을 정립한다.

• 한국실내디자인학회논문집
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• 제21권5호
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• pp.217-226
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• 2012

The purpose of this study had started from trying to look for a new standard in new media era and sounding out possibility of perspective of digital poetry, and had been extracting interpretational elements based on characteristics of otology in digital poetics research in technical method. Through examination of many documentary records, we suggested interpretive elements of medial space based on meaning and the theory of digital poetics. We deduced three perspectives based on relationship between the basic thesis in poetics and interpretive elements of medial space. We used them as tool for analysis of example. We chose as an example that change of program in space is clear through connection of media and space in where new form of creation happens through digital instruments and chose article as subject to which digital technology is applied and had been since 2000, The result of this study is as following: First, epistemological analysis about a space of digital media in new media era requires poetical approach unlike aesthetic approach. We can endow creative action and creation process with significance and pay attention to technical method of manufacturing, stating appropriateness of perspective in digital poetics. Second, the justice of digital poetics and its basic thesis help derive analytic elements from medial space and study purpose of production, technical method, ontological characteristics, which are three perspectives of digital poetics. Third, it analyzed characteristics of example according to three perspectives above and we can analyze characteristics of spacial expression in space of digital media into potential, trans-active, and semiosis space. It would be possible through analyzing examples in digital poetic perspective to overlook new methods of design in 21th and various perspectives and possibilities of medial space design.

• 만화애니메이션 연구
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• 통권40호
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• pp.397-421
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• 2015

새로움은 전통의 틀을 활용함과 동시에 극복하면서 태어난다. 대표적인 고전 내러티브는 아리스토텔레스의 "시학"을 그 시작으로 삼는다. "시학"은 3막구조, 미메시스와 카타르시스, 플롯(미토스)과 캐릭터(에토스), 깨달음과 반전 등을 극작(dramatrurgy)의 근간으로 제시했다. 내러티브의 핵심은 인물을 설정하고, 그들이 겪는 사건의 원인에서 결과에 이르는 과정이다. 이때 극적 효과를 높이기 위해 플롯이 강조된다. 아리스토텔레스가 효과적인 이야기를 위해 가장 중요하다고 여긴 플롯은 고전 내러티브만이 아니라, 내러티브적 성향을 가지고 있는 현대 모든 영상물에서도 그 중요성이 두드러진다. 본 연구는 "시학" 이래 구축된 전통적인 내러티브 방식에 대한 이해와 함께, 새로운 플롯 활용의 사례로서, 2011년 칸광고제에서 인터넷영화 부문 수상작인 <데드 아일랜드>의 예고편(이하 ''로 표기)을 분석한다. 예고편은 보다 많은 관객 또는 소비자를 만들기 위한 목적을 가진 광고이다. 은 역할에 충실한 광고임과 동시에 완성된 내러티브를 가진 3D 단편 애니메이션 작품이다. 본편 게임과 시공간 배경과 세계관을 공유할 뿐, 전혀 다른 인물들과 사건으로 진행된다. 그 인물과 사건이 특별한 것만은 아니다. 대신 은 아리스토텔레스가 한 번도 다루지 않은 시간의 개념을 조정함으로써 독특한 플롯 구성을 선보인다. 특히 비선형적(non-linear)인 구조로 원인과 결과라는 시간적 연계가 독특하게 형성되어 있다. 본 연구는 시간의 배열, 방향, 속도 조정을 통해서 이 평범한 내러티브를 어떻게 극복하고, 의미 창출에 도달하는지 알아본다. 이를 위해 내러티브와 쇼트분석을 시도한다. 나아가 영상물의 내러티브가 가질 수 있는 시간 변형의 또 다른 개념의 존재를 모색한다. 이를 위해 "시학"의 주요 개념과 함께 주네트($G{\acute{e}}rard$ Genette)의 내러티브 연구를 참조한다.

• 한국응용약물학회:학술대회논문집
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• 한국응용약물학회 1994년도 춘계학술대회 and 제3회 신약개발 연구발표회
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• pp.303-303
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• 1994

ICV infusion of morphine (MOR) produces strong analgesia in man and animals. The analgesic effect is thought to be mediated by the centrifugal inhibtory control, But neural mechanisms of the analgesic effect of ICV morphine are not well understood. For example, in the previous studies, ICV morphine does not inhibit nociceptive transmission in the spinal cord. On the contrary, ICV MOR often excites activity of dorsal horn neuron in the spinal cord. In the present study, we found that ICV MOR had dust actions on activity of dorsal horn neuron that it produced both inhibition and excitation of dorsal horn neurons. Since MOR exerts i Is action via three different types of opioid receptors, we further sought to investigate if there are differential effects of opioid receptor agonists on dorsal horn neurons when administered ICV.

• The Journal of the Acoustical Society of Korea
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• 제22권3E호
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• pp.133-140
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• 2003

A time series simulation is presented by a ray approach for the simulating the received waveform of a broadband acoustical signals interacting with the ocean boundaries. The environment is assumed to be horizontally stratified, and the seafloor is described in terms of homogeneous fluid half-space. The ray approach includes the effects of reflection from the air-water, water-sediment interface and phase shifts due to boundaries interaction. To generate time series, we assume that the acoustic energy propagates from source to receiver along eigenrays and represent the action of the bottom on the incident wave by a linear filter and characterized in the frequency domain by the transfer function. As example application, the time series for an explosive source in a shallow water environment is calculated and analyzed in terms of acoustical process. good agreement with measured time series is demonstrated.

• 무역상무연구
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• 제36권
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• pp.29-46
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• 2007

The fraud exception rule allows for the issuing bank to dishonor the claim if it the documents and transactions bear fraud though the documents presented are complied with the terms and conditions of the letter of credit. A question arises whether the fraud exception rule can apply to innocent beneficiary when fraud is made by 3rd party. United City Merchants v. Royal Bank of Canada showed a good example how to handle in case of innocent beneficiary. At this case House of Lord found that innocent beneficiary deserves payment applying nullity exception rule. I believe that the nullity exception rule is employed for the benefit of innocent beneficiary as far as the issuer and applicant get no actual damage by the 3rd party's fraudulent action which is shown on documents.

• 대한수학회지
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• 제52권1호
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• pp.67-80
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• 2015

For a pomonoid S, let us denote Pos-S the category of S-posets and S-poset maps. In this paper, we consider the slice category Pos-S/B for an S-poset B, and study some categorical ingredients. We first show that there is no non-trivial injective object in Pos-S/B. Then we investigate injective objects with respect to the class of regular monomorphisms in this category and show that Pos-S/B has enough regular injective objects. We also prove that regular injective objects are retracts of exponentiable objects in this category. One of the main aims of the paper is to draw attention to characterizing injectivity in the category Pos-S/B under a particular case where B has trivial action. Among other things, we also prove that the necessary condition for a map (an object) here to be regular injective is being convex and present an example to show that the converse is not true, in general.