• Journal of Biomedical Engineering Research
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• v.25 no.6
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• pp.465-469
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• 2004

We propose a new training system for the improvement of equilibrium sense using unstable platform. This system consists of unstable platform, computer interface and various softwares. The unstable platform was a simple structure of elliptical-type which included tilt sensor and wireless RF module. To evaluate the effort of balance training, we measured the parameters such as the moving time to the target and duration to maintain cursor in the target of screen. Balance training was carried out for two weeks and we classified the subjects into two groups by the training program. As a result, the moving time was reduced and duration time was lengthened through the repeating training of equilibrium sense using training program of sine curve trace(SCT) and Block game. Especially, there was remarkable improvement at direction which was too difficult for the subjects to balance their body. It was showed that this system had an effort on improving equilibrium sense and might be applied to clinical use as an effective balance training system.

• Korean Journal of Culture and Social Issue
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• v.21 no.3
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• pp.419-455
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• 2015

In study I, Domain-Specific Risk Taking Scale(DOSPERT) was translated into Korean and was validated that it had 6 factors structure and showed adequate reliability and validity, using the data had been collected from 438 participants. In study 2, two research problems were examined using the data had been collected from 497 participants who were different from study I. First, the mediation effect of sensation seeking and perceived benefit on the relationship between narcissism and risk-taking were examined. Using path analysis, it found that sensation seeking and perceived benefit mediated the relationship between NPI narcissism and risk-taking fully, and between PNI narcissism and risk-taking partially. Seceond, the moderate effect of contingencies of self-worth(CSW) on the relationship between perceived benefit-risk and risk-taking was examined. Using multi-group analysis, it found that virtue CSW moderated the relationship between perceived benefit-risk and total risk-taking, various CSWs moderated the relationships between perceived benefit-risk and 6 sub domains of risk-taking. These results were compared with previous studies of risk-taking and discussed the relevance of the narcissistic type.

• Proceedings of the Korean Institute of Intelligent Systems Conference
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• 2002.05a
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• pp.187-190
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• 2002

인간의 두뇌에서는 갖가지 다양한 형태의 입력들을 이용하여 동시에 여러 가지의 판단, 추론 및 기억 등의 기능을 수행한다 이러한 이유로 인간 두뇌는 거대한 지능형 정보처리기라고 할 수 있다 현재 정보처리 메커니즘은 다양한 형태로 발달되고 있지만 그 중에서도 지능형 정보처리 메커니즘으로는 소프트 컴퓨팅 기법을 응용한 것이 대부분이다. 본 논문에서는 소프트 컴퓨팅 기법을 이용하여 두뇌에서의 시각, 청각의 정보처리 과정을 하나의 구조로 모델링하고자 한다. 시각에서의 정보와 청각에서의 정보는 각기 다른 모듈에서 처리되는 방식을 취하고 있으며, 최종적으로 두 감각 정보를 이용한 처리가 가능하도록 모듈형태의 전체적인 구조를 지니고 있다. 상이한 두 가지의 정보를 동시에 처리하는 과정을 모델링함으로써 복잡한 문제의 해결 및 다양한 경우에 대한 고려를 수행하여 인간 두뇌 모델링의 기초를 마련하고자 한다.

• Proceedings of the Korea Contents Association Conference
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• 2010.05a
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• pp.434-436
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• 2010

가상 세계는 현실과 유사하게 디자인된 가상 환경과 인간처럼 행동 하도록 설계된 agent들로 구성되어 있다. 이 agent는 입력된 행동들만 수행하는 기존의 시스템과는 달리, 자신의 감각 기관을 통해 지각된 정보를 자신이 가진 knowledge schema와 비교하여 판단한 후, Agent 스스로 행동하는 것이 특징이다. 이 과정에서 새로운 정보를 저장하기도 하고, 기존의 정보를 수정하기도 하며 때로는 실수를 범하기도 한다. 가상 세계에 존재하는 Agent는 지각, 인식, 판단, 행동의 단계를 끊임없이 반복한다. 이 가운데 '지각'의 주된 목적은 Agent의 인식 성공률을 높이는데 있다. 이것을 위해서는 인식에서 비교 가능한 최적의 데이터 형태로 지각의 데이터들을 전달해야한다. 이 연구에서 지각 단계의 데이터 구조는 어떻게 구성되어야하고 또, 어떤 방식으로 인식 단계에 전달되는지에 대해 소개할 것이다.

• Proceedings of the Korea Institute of Fire Science and Engineering Conference
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• 2011.04a
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• pp.188-191
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• 2011

현대사회는 기술의 발전으로 인하여 초고층 건축물과 미적 감각을 최대한 활용한 각종 구조별, 형상별 건축물들이 등장하였다. 따라서 이에 사용되는 건축 자재들이 다양화됨에 따라 화재 발생 시 유독가스생성 및 빠른 화재 확산으로 이어질 수 있는 위험성들이 잠재되어 있다. 이러한 화재위험을 최소화하기 위하여 국내에서는 KS F 2257-1:(건축 부재의 내화 시험 방법)이 제정되어 현재까지 구조물의 화재성능을 확인하고 있다. 이에 따라 내화벽 및 방화문이 건축물에 설치되어 건축물의 하중이 크게 증가하고 있다. 따라서 본 연구에서는 기존에 활용되지 않은 소재를 활용하여 목재 방화문을 제작하였으며, 이에 따른 성능을 분석하였다. 그 결과 내화 직물원단은 13분, 글라스울은 17분의 내화성능이 있는 것으로 확인되었으며, 난연 목재로 제작된 심재의 탄화를 보강할 불연 심재를 사용하여 개발 방향을 설정해야 할 것으로 분석되었다.

• Applied Microscopy
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• v.40 no.2
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• pp.109-116
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• 2010

Morphology and microstructure of the suction trap in aquatic Utricularia japonica were examined using scanning electron microscopy. Branched stems bear numerous suction traps without root formation. The traps are derived axillary from the node, and their antennae and appendages extend in a peculiar fashion. The trap walls are thin, two-celled, parenchyma tissue and simple, small glands are scattered in both internal and external surface of the trap. The entrance of the trap is surrounded by one pair of dorsal antennae and ventral appendages, where the former guides the prey to the entrance. Trap door is situated below the entrance and numerous sessile and stalked capitate trichomes cover the entrance and even on the door surface. The capitate trichomes are secretory, but four trigger hairs formed on the central areas of the door are not. They are believed to function in activating and tripping the trap door. A specialized region of the threshold come in contact with the lower portion of the door upon closing. The secretory capitate trichomes near this region are responsible for producing and secreting a mucilage-like substance which composes the velum. Two-armed bifid glands are located in the interior side of the threshold, while four-armed quadrifid glands are considerably numerous occurring over the entire inner trap wall. Bifid and quadrifid glands develop semi-spherical basal cells that connect them to the inner wall surface. Antennae, trigger hairs, capitate trichomes, bifid and quadrifid glands are more important structures in the carnivory of U. japonica.

• Journal of the Korea Convergence Society
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• v.6 no.1
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• pp.93-101
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• 2015

As the axle at the vehicle of railway has the important role for safe running, the strength, and impact-proof, safety factor, stress and deformation must be considered. There are the simulation models of 1 and 2 in this study. These models are investigated by performing the convergence technique through the design, the structural and fatigue analyses with CATIA and ANSYS. As the maximum deformation and equivalent stress of model A are lower than those of model B, model A has more durability than model B. The durability to prevent the damage can be investigated by applying the result of this study into the part design of the vehicle of rail road. And it is possible to be grafted onto the convergence technique at design and show the esthetic sense.

• Journal of Oral Medicine and Pain
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• v.30 no.1
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• pp.87-106
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• 2005

In order to evaluate the mechanism of transmission as well as processing of sensory information originating from low-threshold mechanoreceptor in oral and maxillofacial region at primary synaptic region of trigeminal nervous system, vibrissa afferent fibers of adult cat were labeled with intra-axonal HRP injection. Serial sections containing labeled boutons were obtained from the piece of trigeminal interpolar nucleus. Under electron microscope, total 30 labeled boutons were observed, and ultrastructural characteristics, frequency of occurence, synaptic organizations of vibrissa afferent terminals were analysed. The results were as follows: 1. Labeled boutons contained clear, spherical synaptic vesicles with diameter of 45$\sim$55nm. They formed asymmetrical synapse with dendrites showing definite postsynaptic density, larger synaptic cleft, multiple synaptic structures at various regions. With unlabeled axon terminals(p-ending) containing polymorphic synaptic vesicles, they formed symmetrical synapse showing indefinite postsynaptic density and narrower synaptic area. 2. Each labeled bouton formed 1 to 15 synapses, the average of 4.77$\pm$3.37 contacts per labeled bouton, with adjacent neuronal profiles. Relatively complex synaptic organization, which formed synapses with more than 5 neuronal profiles, was observed in a large number(46.7%, n=14) of labeled boutons. 3. Axo-somatic synapse was not observed. The number of axo-dendritic synapse was 1.83$\pm$1.37 per labeled bouton. Majority(85.0%) of axo-dendritic synapses were formed with dendritic shafts, nonprimary dendrites(n=47, 1.57$\pm$1.38/1 bouton), however, synapses formed with primary dendrites(n=6, 0.20$\pm$0.41/1 bouton) or dendritic spines(n=2, 0.07$\pm$0.25/1 bouton) were rare. 4. 76.7%(n=23) of labeled boutons formed axo-axonic synapse (2.93$\pm$2.36/1 bouton) with p-endings containing pleomorphic vesicles. Synaptic triad, in which p-endings formed synapses with labeled boutons and dendrites adjacent to the labeled boutons simultaneoulsy, were also observed in 60.0%(n=18) of labeled boutons. From the above results, vibrissa afferent terminals of adult cat showed distinctive synaptic organization in the trigeminal interpolar nucleus, thus, suggests their correlation with the function of the trigeminal interpolaris nucleus, which participates in processing of complex sensory information such as two-point discrimination and motivational-affective action. Further studies on physiologic functions such as quantitative analysis on ultrastructures of afferent terminals and nerve transmitters participating in presynaptic inhibition are required.

• The Journal of the Petrological Society of Korea
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• v.4 no.2
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• pp.144-152
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• 1995

The Jangsan Quartzite of the Joseon Supergroup and the foliated granite (so-called granitlc gneiss of presumed Precambrian age) of the Yeongnam massif are in direct contact at Cheondong-ri area, 6 km @SE of Danyang. sllthough it has been thought traditionally that the Jangsan Quartzite overlies unconformably the f&ted granite, it is difficult to interpret the contact as an unconformity smce the basal conglomerate in- the lower part of the Jangsan Quartzite does not have any clast of the foliated granite, Rather, recent structural studies of this area indlcate that the contact is a ductile shear zone. However, the sense and age of the shear movement are still problematic. Our mesoscopic and microscopic studies of &tre Cheondong-11 semi-brittle shear zone involving foliated cataclasite and phyllonite, which is a pa& of the Ogdong fault, indlcate a top-to-the northeast shearing, i.e., dextral strike slip. We also performed Pb-Pb dating for the age-unknown foliated granite, since the age of deformed granite ccarr emtrain the maximum age of deformation. The whole rock and feldspar Pb isotape data for the foliated granite and a micaceous xenolith define an isoc chron age of $2.16{\pm}0.15$ Ga ($2{\sigma}$;MSWD=4.4) which is interpreted as the emplacement age of the granite. This early Proterozoic age agrees with those of Precambrian igneous activity In the Yeongnam massif reported previously. The obtaiPrfid gge confirms the traditional idea about the age of the foliated granite and indicates that other methd(s) should be employed to constrain the age of the shear movement.

• Economic and Environmental Geology
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• v.50 no.6
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• pp.525-535
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• 2017

Exhumation mechanism of migmatite in orogenic belts provides insights into thermo-mechanical evolution of lithosphere in association with orogeny. This study deals with kinematics of structures in and around the Gwangcheon Gneiss, as a preliminary study on exhumation mechanism, which is a main constituent of a domal structure (viz., Oseosan Dome) in the Hongseong area, southwestern margin of the Gyeonggi massif. Geological structures in the Gwangcheon Gneiss, which mainly comprises southern and northwestern part of the Oseosan Dome, generally have kinematic component of top-outward shear. This feature is likely to represent diapiric dome-up movement. In addition, a high strain zone, by which the tectonic domain involving the Gwangcheon Gneiss is bounded on the west, show structural features with normal sense of shear component. Taking available (thermo)chronological data into account, it is interpreted that activation of the high strain zone and exhumation of the Gwangcheon Gneiss occurred during Late Triassic, when the Gyeonggi massif was widely affected by post-collisional processes. It means that the Gwangcheon Gneiss was diapirically moved up and exhumed in the footwall of extensional high strain zone in association with Triassic post-collisional processes.