• Proceedings of the ESK Conference
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• 1997.10a
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• pp.12-22
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• 1997

본 연구는 현재 국내에서 생산되는 주요 승용차의 운전석과 운전석 주변 제어장치간의 규 격이 한국 성인의 신체에 맞게 설계되었는지를 분석하고 평가하여 한국인의 신체에 적합한 승용차 내부설계의 개선안을 제시하고자 한다. 이를 위해 최근의 한국인 인체 측정 자료를 이용하여 운전자가 운전석에서 갖추어야 할 편안한 자세를 3차원 인체 모델링 도구인 SAFEWORK을 이용하여 모델링하였다. 이 모델링을 위해 본 연구에서는 사람과 환경과의 관계를 고정적인 인체 측정 데이터와 기능적인 인체 측정 데이터를 동시에 고려하여 삼차원으로 모델링한 다음 현재 국 내에 판매중인 소형, 준중형, 중형승용차 3종류의 규격차를 적용한 시트를 SAFEWORK으로 설계하였다. 한국인 인체 측정 데이터로 만들어진 마네킨을 설계된 각각의 시트에 앉혀 시트의 규격과, 운전석 주변의 제어장치간의 규격에 대한 적합성 여부를 판단한 결과, 운전석에서 accelerator pedal까지의 거리와 volume control 까지의 거리, 운전석의 깊이와 뒷좌석 폭 등 연구대상이 된 3종류의 내수용 승용차의 주요 규격이 한국 성인의 신체에 부적합하다는 결과가 나왔다. 이에 한국 성인의 인체 측정 데이터에 적합한 시트와 주변 제어장치간의 설계 규격을 제시하고자 한다.

• Proceedings of the Computational Structural Engineering Institute Conference
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• 2010.04a
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• pp.683-686
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• 2010

본 논문은 최근 이슈가 되고 있는 대형 건축/토목구조물에 대한 동적계측, 시스템판별, 모델향상 등을 통한 건전도 평가기법에 대하여, 현재까지 개발된 혹은 개발되고 있는 기술사항 들을 소개한다. 특히, 가속도계를 사용하여 의도하는 진동기록을 획득하기 위한 합리적인 Hardware Chain 구성, 이로부터 신뢰성 있는 동적 구조성능치를 추출하기 위한 다양한 고급 모달해석기법 및 보다 자세한 구조정보 획득 및 손상감지 등을 위하여 실험치와 유한요소 해석치를 일치시키는 모델향상기법에 대하여 기술하였다. 또한 이러한 기술들을 실제 구조물인 고층건물 및 비닐하우스 아치구조에 적용하였으며, 이러한 경험에 근거하여 현 모니터링 기술의 문제점 및 향후 개선방향 등을 토의하였다.

• The Journal of Korean Society for Radiation Therapy
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• v.15 no.1
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• pp.61-65
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• 2003

I. Purpose Patient immobilization is essential factor for successful radiation therapy and major problem is reproducibility to maintain patient position during total radiation therapy period. Purpose of this study is evaluation for usefulness of the custom made immobilization device for the anteroperitoneal resection patients with rectal cancer II. Materials and Methods The object of this study were patients who underwent anteroperitoneal resection and undergo radiation therapy at present with rectal cancer. We made immobilization device for patient individually and analyzed its set up reproducibility, patient position deviation and errors. III. Results There was $5mm{\sim}10mm$ deviation in patient position without individual immobilization device, but we improved the deviation within few mm limitation with individual immobilization device. IV. Conclusion Custom made immobilization device was very helpful for anteroperitoneal resection patient with rectal cancer. We improved the patient position deviation within few mm limitation, shorten the set up time and we could give the comfort to patients.

• Journal of The Korean Society of Agricultural Engineers
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• v.52 no.1
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• pp.79-88
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• 2010

준분포형 모형인 SWAT 모형은 소유역내 수문학적 반응단위 별로 유출, 유사 등의 발생을 평가하는데 이때 Hydrological Response Unit (HRU)의 지형정보가 활용된다. 현재 SWAT 모형의 인터페이스 구조는, 각 소유역의 평균 지형인자 값이 각 소유역내의 모든 HRU의 지형정보로 사용된다. 그러므로 각 소유역내의 HRU에 있는 지형인자를 정확하게 추출하기 위해서는 수계를 자세하게 나누어야 하며, 이를 위해서 더욱 자세한 소유역 수계 인터페이스가 필요하다. 현재 SWAT 모형 인터페이스에서는 수계를 나눌 때 임계값의 최소값은 최대 flow accumulation 값의 0.1 %가 사용된다. 따라서 HRU의 지형인자를 추출하기 위해 아주 자세한 정도로 소유역의 수계를 나눈다는 것은 불가능하다. 본 연구에서는 사용자가 원하는 임계값과 농경지 경계를 근거하여 소유역 경계를 추가로 수계를 나눌 수 있는 Dual Watershed Delineation Module (DWDM) 을 개발하였다. 기존 SWAT의 수계추출 모듈로 유량을 모의한 결과 $27,219\;m^3$/month 가 산정되었고, DWDM 을 적용한 결과 $26,172\;m^3$/month 로 약 3.8 %의 미미한 차이가 생겼다. 하지만 유사의 경우 DWDM을 적용하기 전에는 0.779 ton/month, 적용 후에는 2.688 ton/month 로 약 245 %의 차이를 보였다. 즉 농경지를 추가적으로 수계를 나눌 때 유사의 가장 민감한 요소인 경사장을 실제지형에 맞게 고려함에 따라 좀 더 정확한 유사 산정을 할 수 있었다. 농경지에서의 정확한 수문 및 유사 평가 시 본 연구에서 개발한 모듈이 적용 되어야 한다고 사료된다.

• Journal of Veterinary Clinics
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• v.28 no.5
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• pp.510-515
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• 2011

This study was performed to quantitatively assess the normal lung volume and density according to the position by multi-detector computed tomography (MDCT) in dogs. Helical CT of the thorax was performed on 4 different positions with dorsal, left lateral, right lateral and ventral recumbency in 6 Pekingese and 6 Maltese dogs. During CT scanning, dogs were kept hyperventilated. Through the 3-dimensional reconstruction of CT images, the lung parameters were measured as the volume and density of the left, right including accessory lobe, and total lung. 3D images represented the different lung shape between Pekingese and Maltese dogs. Their difference of total lung volume and total lung density was not significant on the each position in both breeds. Right lung volume was significantly higher than left. The difference of left and right volume was $66.91{\pm}25.1$ ml. Linear relationship was shown between body weight and lung volume of ventral recumbency position. The dependent lung had higher density and lower volume than nondependent lung in both breed dogs. The volume of nondependent lung was not changed compared with the volume on ventral or dorsal recumbency. The total lung volume measured with MDCT is correlated with the lung density, and the lung density is useful to predict the normal total lung volume.

• Journal of the Korean Society of Propulsion Engineers
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• v.18 no.1
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• pp.42-49
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• 2014

Performance evaluation was carried out for the 70 N-class hydrazine thruster whose design performance had been already verified. The pulse-mode firing test was conducted for the development model thrusters with various thrust chamber diameters. Evaluation was made by the performance parameters such as specific impulse, impulse bit, and characteristic velocity, etc: specific impulse and characteristic velocity were deteriorated as the thrust chamber diameter deviates from a standard model. Consequently, it is revealed that the performance characteristics of standard model is most superior among the test models.

• Journal of the korean academy of Pediatric Dentistry
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• v.42 no.4
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• pp.327-330
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• 2015

The safety and success of dental sedation for children depend mainly on respiratory status of patients. A special condition, that is, nasal breathing in supine position with their oral airway blocked by rubber dam, should be considered. Therefore, irrespective of medical consultation, pediatric dentists themselves should do respiratory assessment especially adenotonsillar hypertrophy, nasal obstruction, posterior nasal drainage and airway hypersensitivity. Patients with sinusitis, allergic rhinitis, asthma, snoring and OSAS(obstructive sleep apnea syndrome) can induce the sedation failure and complete management of these can improve the safety of dental sedation.

• Journal of the Korea Convergence Society
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• v.9 no.10
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• pp.237-242
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• 2018

A micromixer is a component of a lab-on-a-chip or microfluidic device that mixes two or more chemicals together(convergence). The purpose of this study is to assess the performance of passive micromixer of various shapes. Six shapes of micromixers were compared and three dimensional modeling was carried out to have the same hydraulic diameter. The commercial code, ANSYS Fluent, was used to simulate the internal mixing flow. A numerical analysis method is described in detail in this paper. The performance of the micromixer was compared with the mixing index and pressure drop. Consequently, the CDM-8T shape showed reasonable mixing performance and relatively low pressure drop.

• Journal of the Korean Society for Library and Information Science
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• v.50 no.1
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• pp.417-435
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• 2016

Relevance judgment is important in terms of improving the effectiveness of information retrieval systems, and it has been dominant for users to search and use images utilizing internet and digital technologies. However, in the field of image retrieval, there have been only a few studies in terms of identifying relevance criteria. The purpose of this study aims to identify and characterize the non-relevance criteria from the failed image searches. In order to achieve the purpose of this study, a total of 135 participants were recruited and a total of 1,452 criteria items were collected for this study. Analyses and identification on the data set found thirteen criteria such as 'topicality', 'visual content', 'accuracy', 'visual feature', 'completeness', 'appeal to user', 'focal point', 'bibliographic information', 'impression', 'posture', 'face feature', 'novelty', and 'time frame'. Among these criteria, 'visual content' and 'focal point' were introduced in this current study, while 'action' criterion identified in previous studies was not shown in this current study. When image needs and image uses are analyzed with these criteria, there are distinctive differences depending on different image needs and uses.

• Journal of rehabilitation welfare engineering & assistive technology
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• v.5 no.1
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• pp.47-52
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• 2011

The functional loot orthoses, when wearing shoes, are in the direct contact with bottom of foots to improve and recover the correctness of abnormal lower limb musculoskeletal imbalance and the primary role of foot and also, it can act to keep the balance and weight of body and support the weakened region, so that it is very helpful to keep body balance for the standing position. In this paper, it was researched that foot orthoses which is accommodable for the function of impact absorption including the gait stability affect on the balanced performances of body in according to the formation and the material of foot part. Taking into account the balanced performances by using the sway velocity, the estimation and comparison of the effects on the balanced performances by each formation and material for foot orthoses was evaluated into significant values(p<0.006) in only the eye-opening posture with Firm state, In this posture, the static process performed by each foot formation reveals in order of normal foot(p<0.010), flat foot(p<0.000) and hollow foot(p<0.003) and then, on the base of each formation of foot part, the result that analyze the effects of the materials of foot orthoses on the balance performance appeared showing that soft materials is more effective on the normal foot and, on the other hand, rigid materials is more effective in balancing on flat foot and hollow foot.