• Journal of Yeungnam Medical Science
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• v.14 no.2
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• pp.329-336
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• 1997

만성 B형 간염의 경과중 흔히 볼 수 있는 간기능의 이상은 대부분 심한 황달의 동반없이 혈청 AST와 ALT의 증가만 보이면서 악화되는 것이다. 저자는 심한 황달을 동반한 16명의 만성 B형 간염 악화 환자(연구군)와 심한 황달없이 AST와 ALT치만 증가된 13명의 환자(비교군)를 비교관찰하였다. PMC 제재를 복용했던 환자는 연구군에서 11명(68.8%), 대조군에서 1명(7.7%)으로 나타났으며 PMC를 포함하여 각종 약제 및 알콜 섭취가 저명했던 환자가 연구군에서 15명(93.8%), 대조군에서는 2명(15.4%)이었다. 혈청 HBeAg 양성율은 급성 악화전에는 연구군에서 14명 중 7명(50.0%), 비교군에서는 13명 모두(100%)에서 양성이었으며, 급성 악화 경과후에는 연구군에서는 변함없었고 비교군에서는 13명 중 3명(23.1%)에서만 양성이었다. 연구군 중 anti-HBe 양성화는 한 사람도 생기지 않았고 6명이 사망하였으며 대조군에서는 8명의 환자에서 anti-HBe 양성화가 생겼고 아무도 간기능 부전으로 사망하지 않았다. 만성 B형 간질환에서 심한 황달을 동반한 급성 악화와 관련있는 요인은 진행된 만성 활동성 간염, 간경변 등 근본적으로 진행된 간기능 저하와 동반된 부적절한 약제나 알콜 복용이 확실히 관계있을 것으로 사료되면 간기능 부전도 그리 드물지 않다. 반면에 간경변으로 진행되기 전 상대적으로 진행이 덜 된 비교군의 만성 B형 간염 환자에서는 황달의 저명한 증가없이 간기능이 갑자기 악화될 때는 자연적인 혈청 anti-HBe 양성 전환의 동반이 흔한 것으로 나타났다.

• The Journal of the Korea Contents Association
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• v.8 no.5
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• pp.215-223
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• 2008

This study is an empirical research on what effects public tax officers' pride, external image, and organization identification as tax specialists have on their organizational commitment. The results of the verification showed that their organizational commitment gets deeper as their satisfaction about pride, external image, and organization identification get greater. In order to meet the public interest in taxation and the demand of the time with positive attitudes and facilitate the functions of the taxation administration, public tax officers' organizational commitment should be intensified by increasing their pride as tax specialists, enhancing external images of the taxation administration, making substantial and realistic efforts, and letting public tax officers have organization identification.

• Journal of the Korean Geotechnical Society
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• v.20 no.3
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• pp.67-74
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• 2004

A case study was performed to verify the applicability of existing formulae for predicting bridge scour in cases where its piers are founded in fine-grained soils. The object of study was the Kanghwa Choji Bridge area where the streambed consists of mainly clayey soil. Site investigation included: direct measurement of scour depths around piers using an ultrasonic probe; and collection of undisturbed soil samples which were later used to determine geotechnical properties and scour rate under different stream velocities. Scour depth prediction was made by employing several conventional methods and compared with the measured value. All methods, not taking soil's intrinsic property against erosion into consideration, overestimated scour depth by a factor of 3.6 to 6.5. On the other hand, the SRICOS method yielded a reasonably acceptable overestimation by a factor of 1.7.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2016.05a
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• pp.252-255
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• 2016

The objective of this paper is to find an easier and non-invasive a way of diagnosing heart diseases based on the heart sound, rigidly heart murmurs, recordings from subjects. Although most of the heart sounds can be easily heard, analysis of the findings by auscultation strongly depends on skills and experience of the physician. Therefore, the heart murmur is require quantitative analysis for automatic diagnosis equipment. For a good sound analysis, the noisy component ware filtered. This can be done using Wiener filter. Once the signal is filtered, it can be segmented into its basic components by signal energy using FFT. After segment the heart sound signal, the relative positions of the different heart sound components will be identified and will be used for quantification purposes. We are using murmur energy ratio. The experimental results are fairly good in relation to automatic diagnosis.

• Journal of Chest Surgery
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• v.29 no.12
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• pp.1377-1380
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• 1996

Severe hemodynamic dysfunction may follow after the closure of the median sternotomy in patients with myocardial edema, cardiac dilatation, and severe postoperative bleeding. In extreme cases, myocardial edema may be so severe that cardiac function is compromised merely by the edges of the open sternum touching the heart. Sternotomy remained open and delayed sternal closure is already described adjunct in complicated cardiac operations. We experi nced a case of delayed sternal closure after 16 hours of CABG using synthes DCP wide plate in a 54-year old obese female patient. Our experience conims that delayed sternal closure Is an effective at simple means of dealing with severe myocardial edema so we report this case with literature review.

• Proceedings of the Korea Water Resources Association Conference
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• 1987.07a
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• pp.87-87
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• 1987

Bridge piers are sometimes damaged by local scour. Although the problem of local scour around pier has been studied extensively, it has been difficult to estimate local scour deth quantitatively. This study is concerned with local scour around semicylindrical piers arranged in various types under the condition of clear water scour. Through dimensional analysis, it was found that scour depths were relative to Re, Fr, and Ns. In the case of semicylindrical piers, the variation of dimensionless scour depth with dimensionless time (effect of Ns, pier diameter and length, incidence angle) and the variation of scour depth with vortex intensity and resistance are investigated experimentally to obtain a formula. And forula for estimating the maximum depth of scour is obtained.

• Water for future
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• v.20 no.1
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• pp.41-47
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• 1987

Bridge piers are sometimes damaged by local scour. Although the problem of local scour around pier has been studied extensively, it has been difficult to estimate local scour depth quantitatively. This study is concerned with local scour around semicylindrical piers arranged in various types under the condition of clear water scour. Through dimensional analysis, it was found that scour depths were relative to Re, Fr, and Ns. In the case of semicylindrical piers, the variation of dimensionless scour depth with dimensionless time (effect of Ns, pier diameter and length, incidence angle) and the variation of scour depth with vortex intensity and resistance are investigated experimentally to obtain a formula. And formula for estimating the maximum depth of scour is obtained.

• Journal of the Korean Institute of Intelligent Systems
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• v.21 no.3
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• pp.302-306
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• 2011

This paper presents Takagi-Sugeno (T-S) fuzzy-model-based controller for depth control of autonomous underwater vehicles(AUVs). Through sector nonlinearity methodology, The nonlinear AUV is represented by T-S fuzzy model. By using the Lyapunov function, the design condition of controller is derived to guarantee the performance of depth control in the format of linear matrix inequality (LMI). An example is provided to illustrate the effectiveness of the proposed methodology.

• Proceedings of the Korea Water Resources Association Conference
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• 2021.06a
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• pp.49-49
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• 2021

홍수 발생 시 제내지에 존재하는 도로 및 상·하수도시설물은 저지대를 중심으로 생성되는 침수지역이 아닌 대부분 집중호우, 태풍으로 인해 발생한 유출량이 지표면 유출로 이어져 지면 경사를 따라 유하하면서 흐름을 방해하거나 노후된 시설물 등에서 피해가 발생한다. 이러한 피해발생 특성을 고려하여 홍수피해액을 추정하기에는 침수면적과 시설물 현황 등을 활용하는 기존의 손실 함수 개발 방법으로는 부족한 부분이 존재하며, 유수 흐름의 주요 인자인 침수심, 유속 등과 같은 수리특성을 고려하여 시설물에 대한 홍수피해액을 추정하는 방안이 필요하다. 본 연구에서는 수리특성을 고려한 시설물의 홍수피해액을 추정하기 위한 손실함수를 개발하고자 국가재난정보관리시스템(NDMS) DB에서 해당 시설물의 상세주소를 이용하여 피해 발생위치와 피해액을 파악하였으며, 2차원 수리해석 모형인 FLO-2D를 활용하여 시설물의 피해위치에서 발생된 수리특성 인자인 침수심과 유속을 분석하였다. 시설물의 단위면적 당 피해액을 종속변수로, 분석된 평균 침수심과 평균 유속을 독립변수로 선정한 후 변수 자료들의 신뢰성과 함수의 설명력을 향상시키기 위하여 이상자료들을 제거한 후 손실함수를 개발하였다. 본 연구에서 개발된 손실함수는 수리특성 인자인 침수심과 유속에 의하여 홍수피해액을 직접적으로 추정하는 방법으로 향후 홍수재해에 대한 사전 재산피해 추정을 통하여 합리적인 선제적 예방조치 등의 홍수재해 예방 활동 등에 활용될 수 있을 것으로 기대한다.

• Clinical and Experimental Pediatrics
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• v.51 no.5
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• pp.512-517
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• 2008

Purpose : Syncope is relatively common in children and adolescents. Among the etiologies of syncope, neurocardiogenical syncope is the most common, but it is often confounded with seizure. We investigated the clinical features of patients under the age of 15 with neurocardiogenical syncope, compared to patients with neurologic disorders including epilepsy. Methods : Among the children who visited the Department of Pediatrics at Cheongju St. Mary's Hospital and Chungbuk National University Hospital from March 2005 to February 2007, we retrospectively analyzed 69 patients whose chief complaint was syncope. We classified the patients by syncope etiology and made comparisons between the neurocardiogenical syncope (NCS) group and the neurological disorders (ND) group regarding to age; location; time and season in which syncope occurred; associated symptoms, including seizures, provocation factors; prodromes; duration of syncope; frequency of previous syncope; birth history; associated disease; past medical history; family history; neurological exam; physical exam; laboratory findings; electrocardiography; electroencephalography (EEG); head-up tilt test; brain CT; and MRI. Results : Among 69 syncope patients, 53 (76.8%) were in the NCS group and 11 (15.9%) were in the ND group. There were no statistically significant differences between the two study groups except for the presence of prodromes and EEG abnormalities. The presence of prodromes in the NCS group was more common than in the ND group [46.9% (23/49) vs. 9.1% (1/11), (P=0.038)]. The EEG abnormality in the ND group was more common than in the NCS group [90% (9/10) vs. 5.8% (3/52), (P<0.01)]. Conclusion : Our study suggests that detailed history-taking, including that concerning prodromes, is important for the accurate diagnosis of neurocardiogenical syncope, and EEG should be obtained if neurological disorders are suggested.