• 대한전자공학회논문지SP
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• 제48권6호
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• pp.68-76
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• 2011

본 논문에서는 기존 무안경식 3D 디스플레이의 제한된 시야각으로 인한 3D 시청에서의 불편함을 해소하기 위해 새로운 패렐랙스 배리어 방식을 제안한다. 제안된 방식은 기존 패렐랙스 배리어의 TN-LCD 구조에서 LC를 공유하는 이중 계층의 ITO 쌍을 추가하였으며, 시선 추적 장치에 의해 시청자의 위치를 감지하여 자동으로 3D 시야각을 시청자의 위치에 맞도록 변화 시킬 수 있는 이중 계층의 패렐랙스 구조를 갖는다. 제안한 이중 계층 패렐랙스 배리어 방식을 시제품으로 구현하고 실험한 결과, 제안한 방식의 유효성을 확인할 수 있었다.

• 동의신경정신과학회지
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• 제26권1호
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• pp.49-61
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• 2015

Post traumatic stress disorder (PTSD) is an anxiety disorder that usually occurs after suffering from a psychological trauma that can not threatening events, which is one of the individual's subjective pain and their families and the larger society due to the chronic disease burden results. Treatment with a medication, as well as cognitive behavioral therapy (CBT), exposure therapy, prolonged exposure therapy (PE), eye-movement desensitizing, and reprocessing (EMDR) are preferentially performed, including psychotherapy. Korean medical psychotherapy consists of a wide range of manual therapy, but it does not have systematically screening limits. This study was developed by Korean medical psychotherapy program for PTSD, and it was carried out as a preliminary clinical trial for validity. The Korean medical psychotherapy program for PTSD consists of four stages as follows: building chapter of safety, flow and send, accept, and integration. Based on this preliminary clinical study of PTSD, seven patients were treated for 2 hours per week for 5 weeks. We report the meaningful results gained by observing the changes in IES-RK points, questionnaire on five-faceted mindfulness, quality of life, anxiety, depression, insomnia, hwabyung scale, HRV, and EEG, before and after the Korean medical psychotherapy program.

• Maxillofacial Plastic and Reconstructive Surgery
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• 제32권6호
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• pp.563-566
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• 2010

Retrobulbar abscess is a rare, but severe complication of paranasal sinusitis. The clinical presentations are eyelid swelling, erythema, proptosis, conjunctival chemosis, restricted ocular movement, and decreased visual acuity. Diagnostic methods available for evaluating retrobulbar abscess include sinus X-ray, ultrasonography, computed tomography (CT), and bacterial culture. For the treatment of retrobulbar abscess, immediate surgical drainage and systemic antibiotic therapy are needed. Proper diagnosis and treatments are necessary for preventing visual loss, cavernous sinus thrombosis, subdural abscess, and other lifethreatening complications. A patient, a 30-year-old man, was admitted to our hospital because of progressive eyelid swelling, erythema, ptosis and decreased visual acuity on the right eye after endodontic treatment. The sinusitis occurred secondary to the infection from an upper molar tooth. The spread of the infection led to the orbit via ethmoidal sinus and posterior orbital wall. Immediate surgical intervention was performed and systemic antibiotics was administrated. The symptoms and signs are improved after treatments, so we present our case with a brief review of the literature.

• 한국융합학회논문지
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• 제9권8호
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• pp.117-125
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• 2018

본 연구에서는 각막굴절수술 후 콘택트렌즈 착용 실태, 유통 중인 콘택트렌즈의 베이스커브와 직경을 조사하여, 변형된 각막에 콘택트렌즈를 착용하였을 때 렌즈 움직임과 착용양상을 확인해보고자 하였다. 각막굴절수술 후 16.5%가 콘택트렌즈를 착용한 경험이 있었다. 또한, 콘택트렌즈의 베이스커브는 8.6 mm, 직경은 14.0 mm가 가장 많은 비중을 차지하였다. 각막굴절수술 한 24안의 각막은 편평하였으며, 콘택트렌즈를 착용했을 때 렌즈는 이측과 하측으로 모두 이동하였다. 각막굴절수술 후 콘택트렌즈 착용으로 불편함을 느낄 수 있어 렌즈 착용시 상세한 설명과 한정적인 렌즈의 종류로 정교한 피팅이 필요하며, 콘택트렌즈의 산업과 임상적인 연구에서 융합이 필요할 것이라고 생각된다.

• 대한치과보철학회지
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• 제22권1호
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• pp.72-78
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• 1984

The notion that the axis of the shaft of the articulator must coincide the patient's mandibular transverse axis tells us the importance of locating the axis precisely. When using kinematic axis to transfer a cast to an articulator, the anatomic asymmetry of the contralateral points will result in certain distortion when the axis transferred to an articulator where the mechanical axis produces symmetry. In this study, after locating the true hinge axis point with Denar hinge axis locator, the discrepancies between true hinge axis point and arbitrary hinge axis point that was 13mm anterior from the posterior margin of center of trangus to the outer canthus of eye were measured. And the discrepancies between left and right true hinge axis point in the superoinferior and anteroposterior directions were measured. For this study, 20 dental students who have no missing teeth and no difficulties of mandibular movement were selected. Upper and lower cast of subjects were mounted on Denar Mark II articulator uisng Denar Slidematic face-bow and centric relation record for the measurement of discrepancies between left and right true hinge axis points. The results obtained as follows. 1. The mean distance from the arbitrary hinge axis point to the true hinge axis point was as follows. Right: horizontal distance; 1.99mm, vertical distance; 2.12mm, linear distance; 3.36 mm. Left: horizontal distance; 1.39mm, vertical distance; 2.06mm, linear distance; 2.09mm. Total: horizontal distance; 1.69mm, vertical distance; 2.09mm linear distance; 3.06 mm. 2. The 87.5% of true hinge axis points were within 5mm of the arbitrary hinge axis point. 3. The mean discrepancies between the right and left hinge axis point were 2.92mm in superoinferior direction and 4.74mm in anteroposterior direction. 4. When transferring the axis to the articulator, anatomic asymmetry between right: and left axis point produces in dislocation of cast on the articulator, and undesirable shift in esthetic tooth position will be resulted.

• 한국운동역학회지
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• 제15권1호
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• pp.45-61
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• 2005

Stance is defined as any state in which the total mass of the body is supported by the feet. In order to maintain stance, the sum of gravito-inertial forces acting on the body must be registered by equal and opposite forces at the region of contact between the organism and the support surface. Balance is controlled by applying forces to the surface of support so as to maintain the body's center of mass vertically above the feet. for a muIti-segment organism, there can be a variety of ways in which balance can be controlled, since movements of different body segments can have similar effects on the control of balance. In general, the organism tends to have a body configuration that is aligned with gravito-inertial force when there are no external forces acting on it. If any segments of the body are not aligned with gravito-inertial force vector, a torque on that segment would tend to move the body's center of mass. The maintenance of postural stability is accomplished in humans by a complex neural control system. This requires organizing integrating and acting upon visual, vestibular, and somatosensory input, providing orientation information to the postural control system. The information necessary to control and coordinate movement is provided by the visual sense of eye position with respect to the surrounding surface layout, the vestibular sense of head orientation in the gravito-inertial space, and the somatic sense of body segment position relative to one another and to the support surface. In this study, perception and action capability was examined from various points of view. The underlying assumption of the study was that the change of postural configuration could be effected by organism, environment and task goal.

• 보건교육건강증진학회지
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• 제25권3호
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• pp.95-109
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• 2008

Objectives: The study was conducted to investigate visual display terminal(VDT) and related risk factors in office workers. Method: The study subjects were 539 officers at 3 places of business in Gwangju. The data were collected by self-administered questionnaire between October 12 and October 17, 2007. and they agreed to participate in this study. The tool was developed by Moon, Jaedong(1991) for VDT syndrome. Data analysis by using SPSS/win 10.0 was performed with descriptive statistics, t-test and ANOVA. Results: The summary of results is as follows: 1) The mean score of total VDT syndrome was $1.17{\pm}.65$ of full score 4.00, which was lower than other research. 2) For relation between general characteristics and total VDT, sex (t=-5.777, p=.000), age (F=3.516, p=.015), satisfaction of job (F=9.540, p=.000), self-awareness of health (F=25.015, p=.000) had statistically significant difference. 3) For relation between behavioral work factors and total VDT, break time of work(t=-5.363, p=.000), eye movement during computer work(t=2.176, p=.031), wrist exercise during(t=2.337, p=.020), distance between monitor and eyes(F=3.682, p=.012) had statistically significant difference. 3) For relation between environmental work factors and total VDT, height of chair(F=8.801, p=.000), space under desk(F=4.244, p=.015), reflection of monitor(t=2.697, p=.008) had statistically significant difference. Conclusion: To prevent and relieve VDT syndrome and musculoskeletal disorders in office workers, it is important to teach good posture and stretching exercise during work.

• 한국콘텐츠학회논문지
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• 제11권4호
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• pp.42-50
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• 2011

생체신호인 뇌파를 이용하여 이러닝 학습자의 학습태도를 파악하고 그에 따른 적절한 피드백을 제공하여 학습자의 학습효율을 극대화하려는 연구의 일환으로 여대생을 대상으로 학습자의 학습태도와 뇌파를 분석하여 이들의 상관관계를 밝혀보고자 한다. 학습자가 학습에 집중하는 태도와 그렇지 않은 태도에 대해 뇌파의 파워 스펙트럼을 추출하여 학습자의 뇌파가 어떻게 반응하는지에 중점을 두어 연구하였다. 학습에 집중하는 태도의 대조군으로 산만한 태도와 눈감은 태도를 설정하여 실험을 진행하였다. 학습에 집중하는 태도에서는 집중도가 산만한 태도에 비하여 높게 나타나고 이완지표는 낮게 나타나며, 클릭과 눈굴림과 같은 산만한 태도에서는 주의지표와 잡파 비율이 높게 나왔다. 특히, 눈을 감았을 때는 알파 세타 비율이 1이하로 나타나 눈을 뜬 다른 상태와 뚜렷이 구분되었다.

• 한국안광학회지
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• 제10권3호
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• pp.159-164
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• 2005

조절과 폭주기능은 밀접하게 연관된 합동운동으로 폭주와 조절 어느 한 쪽이 자극되면 양기능이 동시에 일어난다. 이 중 조절자극에 의해 일어나는 폭주를 조절성 폭주라고 하며, 눈의 굴절상태에 따라 과부족이 있다. 본 연구는 조절성 폭주비와 사위와의 관계를 규명하기 위해 그래디앤트(Gradient)법과 헤트로포리아(Heterophoria)법 둘 다 모두 사용하여 안과적 질환이 없는 성인 남녀 41명을 대상으로 검사하였다. 1. 원거리 사위분포를 조사한 결과, 정위 5명, 외사위 32명, 내사위 4명으로 외사위가 가장 많은 비율을 차지하고 있었다. 근거리 사위분포도는 원거리보다 넓게 퍼져서 분포하고 있었다. 2. 수정체의 조절력을 이완시킨 상태에서 수평사위량 측정시, 38명이 외사위량이 증가하였다. 3. 정상 AC/A ratio에 해당하는 $4{\sim}6{\Delta}/D$를 갖는 사람이 Heterophoria법에서는 27명으로 약 66%를, Gradient 법에서는 16명으로 39%를 각각 차지하고 있었다.

• 대한교통학회지
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• 제20권3호
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• pp.7-16
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• 2002

운전에 필요한 외부 정보는 90% 이상을 운전자의 시각에 의존하고 운전자의 시각활동과 이에 따른 인지, 판단, 행동에 이르는 일련의 과정을 통하여 이루어짐으로 운전자의 시각활동 특성을 파악하는 것은 중요한 의미를 갖는다 특히 곡선부에서는 원활한 운전성을 확보하고 운전중의 교통안전 증진을 위하여 시선유도 시설을 설치하고 운전자에게 전방의 상황을 사전에 제공하고 있다. 따라서 시선유도시설은 무엇보다 운전자의 시각특성이 반영된 관점에서 시선유도 시설의 설치기준, 효용 등이 재검토되어야 할 필요가 있다. 따라서 본 연구에서는 위와 같은 배경을 바탕으로 교통사고 다발지점으로 지정되어 있는 국도 34호선(진천 IC. 벽암리∼입장면 구간, 편도1차로)을 대상으로 운전자의 시각행태와 시선유도 시설을 확인하는 시각적 일련의 과정을 파악하는데 주목적을 두었다. 그리고 이 결과를 바탕으로 곡선부 교통사고 다발지점에서의 교통안전 증진을 위하여 시선유도시설에 관한 운전자 시각행태를 파악하고 향후 정비되어야 할 방향 검토에 목적을 두었다.