• 한국동물위생학회지
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• 제43권4호
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• pp.245-250
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• 2020

Infectious bovine keratoconjunctivitis (IBK) is the most common ocular disease in cattle, manifesting as corneal opacity, corneal ulcerations and potentially vision loss. The present report describes a 10-month-old Holstein Friesian heifer with IBK treated by systemic tulathromycin, and subconjunctival injection of penicillin and dexamethasone. We investigated changes in the hematological indices and microorganisms related to IBK after treatment. Neutrophils and monocytes decreased during recovery, so it was assumed that these two types of white cells are associated with IBK. Moraxella bovoculi was cleared in the eye, nasal cavity, and oral cavity after treatment. The distribution of M. bovoculi before treatment indicated that a combined systemic and subconjunctival treatment was necessary. The lesioned eye was found to be overwhelmed by Mycoplasma bovoculi, while pathogen abundance was reduced in the nasal cavity and oral cavities. These results suggest that antibiotic treatment can alter the composition and relative abundance of microorganisms.

• Archives of Plastic Surgery
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• 제50권2호
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• pp.148-152
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• 2023

Soft tissue filler injection is the second most common nonsurgical cosmetic procedure. Despite the safety of fillers, as use has grown, so has the number of patients affected by adverse events. Ophthalmoplegia following cosmetic filler injection is a rare complication, mostly occurring after injection to the glabella, nasolabial fold, periorbital, and lateral nasal site. In all cases where ophthalmoplegia has been reported following fillers, patients have simultaneously experienced vision loss and other ocular symptoms. We report a case of isolated acute ophthalmoplegia following hyaluronic acid injection solely in the temple region. A 40-year-old woman, 3 hours after the procedure, presented to our hospital with left eye ophthalmoplegia, ptosis, and hypotropia. Treatment started with hyaluronidase, steroids, and anticoagulants. After 4 weeks, left eye ophthalmoplegia remained unchanged, and through a 10-week follow-up, all left ocular movements improved, and only mild hypotropia and ptosis persisted. This case report shows that ophthalmoplegia may also happen with temple region filler injections. We also review available prevention techniques and treatments to avoid such complications when performing soft tissue fillers for gaunt appearance correction.

• Structural Monitoring and Maintenance
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• 제10권2호
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• pp.155-174
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• 2023

High performance concrete (HPC) has been extensively used in thin overlay for repair purpose due to its excellent strength and durability. This paper presents an experiment, where the sensor-instrumented HPC overlays have been followed by dynamic strain and moisture content monitoring for 1 year, under normal traffic. The vibrating wire and soil moisture sensors were embedded in overlay before construction. Four given HPC mixes (2 original mixes and their shrinkage-modified mixes) were used for overlays to contrast the strain and moisture results. A calibration method to accurately measure the moisture content for a given concrete mixture using soil moisture sensor was established. The monitoring results indicated that the modified mixes performed much better than the original mixes in shrinkage cracking control. Weather condition and concrete maturity at early age greatly affected the strain in concrete. The strain in HPC overlay was primarily in longitudinal direction, leading to transverse cracks. Additionally, the most moisture loss in concrete occurred at early age. Its rate was very dependent on weather. After one year, cracking survey was carried out by vision to verify the strain direction and no cracks observed in shrinkage modified mixes.

• 대한임베디드공학회논문지
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• 제19권2호
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• pp.91-99
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• 2024

Collision avoidance system is important to improve the robustness and functional safety of autonomous vehicles. This paper proposes an object-level distance estimation method to develop a collision avoidance system, and it is applied to golfcarts utilized in country club environments. To improve the detection accuracy, we continually trained an object detection model based on pseudo labels generated by a pre-trained detector. Moreover, we propose object-aware depth estimation (OADE) method which trains a depth model focusing on object regions. In the OADE algorithm, we generated dense depth information for object regions by utilizing detection results and sparse LiDAR points, and it is referred to as object-aware LiDAR projection (OALP). By using the OALP maps, a depth estimation model was trained by backpropagating more gradients of the loss on object regions. Experiments were conducted on our custom dataset, which was collected for the travel distance of 22 km on 54 holes in three country clubs under various weather conditions. The precision and recall rate were respectively improved from 70.5% and 49.1% to 95.3% and 92.1% after the continual learning with pseudo labels. Moreover, the OADE algorithm reduces the absolute relative error from 4.76% to 4.27% for estimating distances to obstacles.

• Archives of Plastic Surgery
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• 제34권5호
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• pp.663-666
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• 2007

Purpose: Autologous fat injection into the facial area is a frequently used technique in aesthetic plastic surgery for augmentation of the soft tissue. Fat injection is a very safe procedure because of the advantage of being autologous tissue. Minimal foreign body reaction or infections are noted after fat injection. However, there may be some complications including those as severe as blindness. There have been some case reports on visual disturbances after autologous fat injection reported in the literature. Methods: A 21-year-old female patient underwent autologous fat injection into left eyebrow area to correct depression of soft tissue. Immediately after injection of autologous fat, she complained sudden visual loss on the left eye. She had come to our emergency room and ophthalmologic evaluation showed that the patient could only recognize hand motion. There was no abnormality of the optic nerve on magnetic resonance imaging. Suspecting an ischemic optic neuritis from fat embolism of the central retinal artery, the patient was treated conservatively with occular massage, antiglaucomatic agent, anti-inflammatory drugs and antibiotics. Visual field examination showed visual defect of half the lower hemisphere. Results: While maintaining antiglaucomatic agents and non steroidal anti inflammatory drugs, fundoscopic examination showed no abnormalities on the second day of admission. Visual field examination showed an improvement on the fourth day along with decreased eyeball pain. Significant improvement of vision was noted and the patient was discharged on the fifth day of admission. The patient was followed-up 2 days afterwards with improved vision and visual field defect. Conclusion: We describe an unusual case of sudden unilateral visual disturbance following autologous fat injection into periorbital area.

• 한국안광학회지
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• 제9권2호
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• pp.257-267
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• 2004

본 연구에서는 전라남도 여수지역의 한 석유화학단지애서 적어도 6개월이상 근무한 작업자 1030명을 대상으로 Lanthony D-15-desaturated 검사법을 이용하여 유기용제노출과 후천적 색각이상간의 연관성을 조사하였다. 작업환경측정은 전 작업시간(8시간) 단시료를 각 작업자에게 부착하는 개인시료를 활용하여 각 개인별 평균, 최대, 누적 연평균 8hr TWA를 산출하였다. 연구결과 연령이 높을수록 색혼란지수(CCI)가 유의하게 높았다(P<0.005). 형태에서는 청황색각이상의 분포가 노출군과 비노출군간에 통계적으로 유의한 수준은 아니었지만, 후천적 색각이상에서 주로 나타나는 제3색형과 제4색형 그리고 복합형이 대부분 노출군에서 높은 분포(비노출군 6.16%, 7.55%, 13.71%, 노출군 5.9%, 7.86%, 14.99%)를 보였다. 마지막으로 색각이상과 관련된 변수들을 보정하였을 때, 후천적 색각이상이 좌안에서는 비노출군과 비교하여 볼 때 통계적 연관성은 없었으나 노출군의 Odds ratio가 증가함을 보였다. 또한 연령에 대하여는 좌 우안에서 모두 높은 통계적 연관성을 보였다(p<0.01). 따라서 이 상의 결과로 근로자가 유기용제 중독으로 인해 초기 신경계이상의 증상으로 후천적 색각이상이 존재할 수 있으므로 안보건 사업에서의 또 하나의 일환으로 근로자의 안보건상태에 대한 지속적인 관심과 관리가 필요하다.

• 대한한방내과학회지
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• 제28권4호
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• pp.816-829
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• 2007

Objectives : This study investigated warning signs and stroke presymptoms and their relationship with acute stroke patients in each stroke type. Methods : 217 patients with first-ever acute stroke within 2 weeks as the case group, 146 people without four major risk factors (hypertension, diabetes mellitus, hyperlipidemia and ischemic heart disease) as the healthy control group (Normals), and 160 people as the general control group (Controls) were recruited at the Stroke Medical Center in Daejeon University Oriental Medicine Hospital from July 2005 to March 2007 for this case-control study. We analyzed the odds ratio of each warning sign or presymptom by multivariate logistic analysis and evaluated each stroke type, as well as general characteristics such as age, sex, etc. Results : Paralysis or weakness of the face and limbs, visual field disorder or loss of vision or blurred and double vision in eyes or both eyes, and sudden difficulty in speaking or dysarthria showed significant increase respectively in each stroke type. In contrast, numbness or tingling sensation or lowering sensation of the face and limbs, numbness or dead sensation of 1st and 2nd fingers, tension at cervical lesion, blepharospasm, facial spasm, etc. had no significant relation with stroke occurrence. Conclusions : In this study we demonstrated that each presymptom have an influence on each stroke type and have different odds ratio for stroke. We believe this may contribute to interpreting the importance of warning signs or presymptoms for each type of stroke, and more prospective studies are needed.

• 한국안광학회지
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• 제20권4호
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• pp.511-518
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• 2015

목적: 폭주부족 증상을 가지고 있는 어린이의 주의집중력을 평가하여 폭주부족과 주의집중력과의 상관성을 알아보고자 하였다. 방법: 12-13세의 학령기 아동 74명을 대상으로 convergence insufficiency symptom survey (CISS) 도구와 폭주근점 검사를 시행하여 정상군과 폭주부족군으로 구분하였다. 모든 대상자에게 주의집중력 검사도구를 이용하여 정서적 문제, 과잉행동성 및 충동성 문제, 그리고 관리기능상의 문제에 대해 5점 척도로 설문조사를 실시하였다. CISS 문항에 포함된 폭주부족 관련 자각증상과 주의집중력 문제의 상관성을 분석하였다. 결과: 전체 대상자 중에서 폭주부족군은 29명(39.2%)이었고, 정상군과 폭주부족군의 CISS 총점에 대한 평균은 각각 $5.91{\pm}3.69$점과 $18.31{\pm}7.00$점 이었다(p<0.001). CISS 증상 설문에서 폭주부족군의 어린이들은 눈의 피로, 집중력 저하, 흐리게 보임 그리고 읽던 줄 놓침 증상을 많이 호소하였다. 주의집중력 검사에서는 폭주부족군($74.83{\pm}9.83$점)이 정상군($46.80{\pm}11.30$점)보다 주의집중력 문제가 많은 것으로 나타났다. 폭주부족 증상과 전체 주의집중력의 문제는 유의한 양의 상관관계를 보였다(r=0.798). 결론: 초등학생에서 폭주부족과 관련된 자각적 증상이 심할수록 주의집중력의 문제가 높아지는 것을 확인하였다.

• 한국콘텐츠학회논문지
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• 제18권6호
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• pp.243-256
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• 2018

본 연구는 시각장애인을 대상으로 한 음악 연구의 동향을 살펴보기 위해 1998년부터 2017년까지 국내 국제 학술지에 게재된 총 62편의 학술논문을 내용분석 하였다. 발표연대, 학술지 분야, 연구방법, 연구유형, 연구주제, 연령, 장애특성을 분석틀로 하였다. 연구결과, 최근 10년간 국내 외 모두 논문 편수가 급증하였으며, 교육학, 치료학 등 다양한 분야로 확대되는 경향을 보였다. 연구방법에서 국내는 조사연구가 압도적으로 많은 반면, 국외는 질적연구와 실험연구가 고르게 분포하였다. 연구유형과 주제를 살펴보면, 국내는 음악흥미와 적성을 주제로 한 인식 및 현황조사 연구가 다수였으나, 국외는 음악중재, 음악지각 및 인지를 주제로 한 음악의 영향과 경험 연구가 높은 빈도를 나타냈다. 연령은 국내 외 모두 성인과 아동청소년으로 조사되었고 노인 대상은 확인되지 않았다. 장애특성별 빈도에서 전맹, 저시력을 대상으로 한 연구가 많은 반면, 중도나 중복장애는 적었다. 이는 시각장애와 음악에 관한 연구 동향을 설명함으로써 해당 분야 후속연구의 방향을 제안한다는 의의를 갖는다.

• 한국광학회지
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• 제32권2호
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• pp.49-54
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• 2021

본 논문에서는 고출력 광섬유 레이저의 핵심 부품인 대구경 광섬유 엔드캡을 제작하는 장비를 설계 및 제작하였으며, 제작장비를 이용하여 대구경 광섬유 엔드캡을 제작하였다. 대구경 광섬유 엔드캡 제작장비는 레이저 광을 조사하여 접속 열원으로 사용하기 위한 CO2 레이저 광원부, 대구경 광섬유와 엔드캡의 위치를 이송하기 위한 정밀 스테이지 조립체, 스테이지 조립체와 연동되어 융착 시 정렬에 사용되는 비전 시스템으로 구성되어 있다. 레이저 광원의 출력은 스테이지 조립체와 연동되어 출력을 제어하며, 비전 시스템으로 대구경 편광유지 광섬유의 편광축을 정렬할 수 있도록 제작되었다. 자체 제작한 장비를 이용하여 클래드 직경이 400 ㎛인 대구경 편광유지 광섬유와 10(W)×5(D)×2(H) ㎣의 엔드캡을 레이저 융착하여 대구경 광섬유 엔드캡을 제작하였다. 제작된 대구경 광섬유 엔드캡의 신호광 삽입손실, 소광률 및 빔품질(M2)은 각각 0.6%, 16.7 dB, M2x=1.21, M2y=1.22로 측정되었다.