• Animal cells and systems
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• 제1권2호
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• pp.371-379
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• 1997

To investigate the movement of sperm head and the role of sperm neck in forward sperm motility in the Korean striped field mouse, Apodemus agrarius coreae, the morphological characteristics of the cauda epididymal spermatozoa were examined by light microscopy and scanning and transmission electron microscopy. Spermatozoa of A. agrarius coreae were characterized by the conspicuous shape of the acrosome and the long tail compared with those of other rodents. Total length of the sperm was $133\mu{m}$. The sperm head had a curved falciform shape. The head was 8.0${\mu}$m in length, and about 4.0 ${\mu}$m in width. The shape of acrosome had an openerlike form. The sperm tail (125 ${\mu}$m) consisted of four major segments: neck (0.5 ${\mu}$m), middle piece (29.5 ${\mu}$m), and principal piece plus the end piece (95 ${\mu}$m). The outer dense fibers were arranged in a horseshoe fashion, and No. 1, 5, 6, and 9 of the outer dense fibers were larger than the others. The mitochondrial bundles of middle piece were composed of a pair of arms, which surrounded the axone of the middle piece by the 45 0 angled helical structure. The total number of mitochondrial gyres was 188. In particular, the microfilament structures existed in plasma membrane of the sperm, which was adjacent to the acrosomal region on the nuclear membrane. The segmented columns were surrounded by microfilament structures, and the microfilament bundles were adjacent to the outer membrane of the first mitochondria of middle piece. This study presents for the first time the existence of microfilament structures within the plasma membrane of sperm which is located from the adjacent acrosome region to the connecting piece in sperm neck of Korean striped field mouse, Apodemus agrarius coreae. The present result suggests that the constriction and extension of microfilament in sperm neck as well as the wave-movement of sperm tail may play a role in the movement of sperm head.

• 한국의류학회지
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• 제31권2호
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• pp.280-291
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• 2007

The purpose of this study is to research characteristics of costume which is expressed in Gustav Klimt's Paintings. In the end of 19th century and the beginning of 20century Vienna, considered to be the fashion Mecca after Paris, the creativity of such artists allowed the 'Anti-Fashion Movement' to set itself up against the frippery of the costume of the time. The Secession Movement received the effect of Art Nouveau and Symbolism and Klimt led of this movement as a forerunner in Vienna. Many women appealed in Klimt's Painting with unique costume which contrast to traditional fashion that period time. The characteristics of costume in his paintings are as follows. Firstly, Klimt drew in the women's costume which made by designers of Vienna Workshops, at one of motive of his work of art. Costume got a opportunity became a new art field, because there was no conceptual thinking of a fashion designer at that time. Secondly, the costume of Klimt' paintings had both anti-fashion design and elements of fashion, so he gained considerable support from leaders of high fashion who was the upper classes. Thirdly, both anti-fashion and fashion appeared in his painting at first period. Costume which made at the Vienne Workshop appealed portraits of Klimt paints at the second period. Klimt interested in Naturalism, Japonism, Orientalism and Greece style and expressed his characteristic techniques at the last period. Lastly, Klimt liberated the woman from a physical and spirit restriction through his various artistic presentations.

• 한국도로학회논문집
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• 제10권1호
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• pp.41-48
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• 2008

이 논문은 가파른 경사면 전면에 시공되는 낙석방지벽에 작용하는 토압의 특성에 대한 내용을 다룬다. 낙석방지벽 배면되메움 공간은 주동상태의 흙쐐기가 완전히 형성될 만큼의 공간이 없고, 토압의 특성은 벽체의 이동과 벽체와 절취사면 사이의 좁은 간격에서 발생하는 아칭 효과의 영향을 크게 받기 때문에 해석적으로 신뢰성 있는 규명이 되지 않고 있다. 연구는 실내에서 축소모형에 대한 원심력시험을 통하여 수행되었다. 연구결과는 낙석방지공 배면토압이 지반의 경사각과 벽체이동에 크게 영향 받음을 보여주었다 벽체상반부에서는 벽체이동에 의한 토압감소가. 하반부에서는 아칭 효과가 뚜렷하게 나타남을 보였다. 이 연구결과에 의하면 낙석방지벽 설계에서 벽체에 작용하는 토압은 지반경사와 공사중 또는 완공후의 벽체 이동조건을 고려하여야 함을 알 수 있었다.

• 한국운동역학회지
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• 제21권3호
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• pp.269-279
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• 2011

This study was analyzed the characteristics on the stability of posture while conducting a through two and half rotation technic of pench$\acute{e}$ in rhythmic gymnastics. Two rhythmical gymnastics player(LKH and SSJ) who is a member of the national team were selected, and for obtain the kinematic and kinetic variables were used a ProReflex MCU 240 infrared camera(Qualisys, Sweden) and a Type9286A force platform(Kistler, Switzerland). The mechanical factors were computed by using Visual3D program and Matlab R2009a. During the landing and rotation phase the results showed following characteristics; 1) In medial-lateral and horizontal displacement of the support foot, LKH showed smaller movement than SSJ, but SSJ showed smaller movement than LKH in swing foot. LKH showed bigger movement in medial-lateral axis of COP and vertical axis of COG, but SSJ showed bigger movement in horizontal axis of COP and medial-lateral axis of COG. 2) SSJ showed bigger maximum horizontal and vertical velocity at P1 and P2 than LKH. 3) In the inclination angle of COP and COG, SSJ showed smaller change than LKH, but within medial-lateral tilt of the shoulder, LKH performed rotation motion in horizontal position than SSJ. There was no differences in each force components during rotation, but on landing phase, the results showed a characteristic that SSJ exerted bigger breaking force and vertical force than LKH.

• 정보처리학회논문지B
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• 제10B권4호
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• pp.403-410
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• 2003

자율운항제어 시스템은 선박운항에 있어 항해계획을 수립하고 현재의 선박운항 상태를 파악하여 선박을 제어하는 항해 전문가 시스템이다. 이러한 자율운항제어 시스템을 테스트하기 위해서는 실제 선박을 대상으로 성능을 테스트하여야하나, 선박은 고가의 운송수단이고, 자율운항제어 시스템을 장착하기 위한 하부장치 인터페이스를 설계 및 구현하기에는 많은 시간이 소요되므로 선박시뮬레이션 시스템을 이용하는 것이 타당하다. 선박시뮬레이션 시스템은 선박의 물리적 운항특성을 모방하는 선박운동시뮬레이션 시스템과 선박 운항 주변에 변화하는 장애물을 시뮬레이션하는 주변객체 시뮬레이션 시스템으로 구성된다. 본 연구에서는 선박 운동방정식을 이용하여 선박의 물리적 및 운항 특성을 모방한 선박운동시뮬레이션 시스템을 설계 개발하였다.

• 환경영향평가
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• 제9권2호
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• pp.127-142
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• 2000

This research was performed for analyzing the transport of suspended solids during the harbor construction. In behalf of the research, we have analyzes the characteristics of suspended solids movement in sand reclamation of breakwater according to age of tide and tidal period at the construction spot of Pusan new harbor. In the process of sand reclamation, soil was dumped by a dumping device which direct soil from the barge to the bottom of the sea. According to the results from this research, suspended solid concentration was very high in the range of 5m from the dumping point right after the dumping. However these suspended solids settled very quickly and the solids concentration was very beyond 10m from the dumping point. It is deduced that the movement of solids dumped from barge has the tendencies as following; 1) Most of the dumped solids precipitated quickly after the dumping 2) The rest of the suspended solids are diffused slowly toward the bottom of the water being figured smoothing curve 3) The diffusion movement of suspended solids tend to proceed toward the shore line in a parallel motion with tidal current at the sea-bottom That is to say, most of the suspended solids precipitated very quickly even though highly concentrated solids produced at the bottom of the solids which did not precipitated spread with the tidal current horizontally along the bottom of the sea.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제12권5호
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• pp.2313-2326
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• 2018

The method of operating a game could determine the psychological distance between the player and the game character, and thus, in the Virtual Reality, players' control methodologies are important to enhance their immersion. This study has the objective of examining the difference in games according to the method of operation based on the player's movements. This study researched the effect of the method of operating movement conforming to the movement of the character and the physical operation of the body on forming game experiences for the player. The result of performing an experiment increased reality for the game player through a controller in the shape of the actual control, to increase focus in the game. As so, game play through movements, including actual movements by the player displayed to enhance game satisfaction. In the part of media remediation field, Game can be defined as media which has their own unique hypermediacy. Especially, in the motion based game, players' movement mediates players and the game, therefore, players' movement could make players' experience augmented or immediate in accordance with the characteristics of movements. Even though sports and dances genres of motion-based games are common, RPG or adventure genres are rare. It can be explained that the characteristics of the action have been explained in the immediacy. In a game of fantasy, which is difficult to experience in real-life situations, the nature of the player's motion can increase the immersion of the game, which can contribute to utilization of players' motion and experience design in the various genres and suggestion of grounds theory. In addition, through this study, it is able to design motion-based games of various genres.

• 한국지진공학회:학술대회논문집
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• 한국지진공학회 2000년도 추계 학술발표회 논문집 Proceedings of EESK Conference-Fall 2000
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• pp.33-40
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• 2000

The assessment of earthquake hazards involved consideration of earthquake magnitude, frequency, last movement and probability of occurrence. The appraisal of earthquake potential is feasible because historical data show a good correlation between earthquake size and the fault rupture parameters of length, displacement, and area. Additionally, the characteristics of fault behavior should be considered to evaluate the earthquake potential magnitude. In this study, in order to evaluate the earth quake potential by the fault behavioral patterns, based on the experimental background which the geometric characteristics of the individual domains, such as strike, width, fault tip patterns, and orientation of secondary shears reflect sliding behavioral patterns in each section, the straight sections of A, D and E domains were examined to the creeping section of stably sliding. In contrast, the curved section of B domain was examined to the locked section of stick-slip movement. These results of studies can be applied to evaluate the earthquake potential magnitude from the fault structural parameters.

• 대한안전경영과학회지
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• 제11권4호
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• pp.311-317
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• 2009

In this paper deals with behavior of the magnetic abrasive using Ba-Ferrite on polishing characteristics in a new internal finishing of STS304 pipe applying magnetic abrasive polishing. The magnetic abrasive using Ba-Ferrite grain WA used to resin bond fabricated low temperature. And Ba-Ferrite of magnetic abrasive powder fabricated that Ba-Ferrite was crused into 200 mesh. The previous research have made an experiment in the static state the movement of magnetic abrasive grain is nevertheless in the dynamic state. In this paper, We could have investigated into the changes of the movement of magnetic abrasive grain. In reference to this result, we could have made the experiment which is set under the condition of the magnetic flux density, polishing velocity according to the form of magnetic brush.

• 대한인간공학회:학술대회논문집
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• 대한인간공학회 1995년도 추계학술대회논문집
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• pp.141-155
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• 1995

To understand kinetic characteristics during the process of initation of gait from standing, from the visual cue to toe off of the stance limb, vertical ground reaction forces(GRF) and center of pressure(COP) during gait initation period were evaluate with two force platforms placed side by side in thirty two adults(young 16, elderly 16, each mean age 27.79 and 51.70 years) with no history of 7 neuromusculo-skeletal abnormality. Gaint initation period of swing and stance limbs, percentage of gait initiation period and ratio of the vertical forces to body weight at each peak of the vertical forces of both limbs, and also movement of net COP were measured and described. 2 groups, one of 16 young adults and another of 16 elderly adults, were compared statistically. These data showed the increase of initiation of gait period and the decrease of movement of net COP, nd also can now be used as a part of database when initation of gait in subjects with neuromusculoskeletal abnormalities need to be evaluated.