즐례 : 저칼슘혈증을 동반한 급성 화농성 갑상선염 1예

유승진 ( Seung Jin Yoo ),심명숙 ( Myoung Sook Shim ),김원준 ( Won Jun Kim ),김은정 ( Eun Jung Kim ),오광훈 ( Kwang Hoon Oh ),이제훈 ( Je Hoon Lee ),권준성 ( Jun Sung Kwon ) 대한내과학회 2014 대한내과학회지 Vol.86 No.1

저자들은 급성 화농성 갑상선염을 진단하고 항생제, 칼슘 제 및 1α-OH-D3 투여로 임상증상 및 부갑상선기능, 저칼슘 혈증이 호전된 1예를 경험하였기에 문헌고찰과 함께 보고하는 바이다. We report a case of acute suppurative thyroiditis complicated by idiopathic hypoparathyroidism. The patient was a 49-year-old female who visited our clinic with a painful goiter on the left lobe of the thyroid gland. She was hypocalcemic, which was accompanied unusually by acute suppurative thyroiditis. She also suffered from tetany of both hands and legs. She had undergone a right subtotal thyroidectomy at another hospital 23 years previously due to a benign thyroid nodule. Intact parathyroid hormone (PTH) levels were increased, but other laboratory findings were normal. No special treatment was administered for the acute suppurative thyroiditis, except antibiotics, to observe its natural course. Her PTH levels decreased and serum calcium returned to normal. The complication of acute suppurative thyroiditis suggested the possible involvement of idiopathic hypoparathyroidism. (Korean J Med 2014;86:79-83)

The Prevalence of Autism Spectrum Disorder in School-Aged Children

Seung-Jin Yoo(유승진),Myung-Ho Lim(임명호),Ki-Chung Paik(백기청),Ho-Jang Kwon(권호장),Mina Ha(하미나),Jee-Hyun Kim(김지현),Sung-Ja Cho(조성자),Eun-Jung Kim(김은정),kwang-hoon Choi(최광훈),Yearn-Mi Yi(이연미) 한국환경독성학회 2010 한국독성학회 심포지움 및 학술발표회 Vol.2010 No.11

저칼슘혈증을 동반한 급성 화농성 갑상선염 1예

유승진 ( Seung Jin Yoo ),심명숙 ( Myoung Sook Shim ),김원준 ( Won Jun Kim ),김은정 ( Eun Jung Kim ),오광훈 ( Kwang Hoon Oh ),이제훈 ( Je Hoon Lee ),권준성 ( Jun Sung Kwon ) 대한내과학회 2014 대한내과학회지 Vol.86 No.2

가정식 대체식품용 떡 가공상품의 유통기한 설정

유승진 ( Seung Jin Yoo ),진종언 ( Jong-eon Chin ),오성훈 ( Sung Hoon Oh ),류민정 ( Min Jung Ryu ),황권택 ( Kwontack Hwang ) 한국키틴키토산학회 2018 한국키틴키토산학회지 Vol.23 No.3

본 실험은 떡 가공상품을 가정식 대체식으로 이용하고자 유통기한을 설정하였다. 통팥찰떡과 녹두깨찰떡에 대하여 실험을 실시하였고, 떡은 편의용으로 하고자 증숙 후 바로 tray에 sealing하는 구조로 개발하였고, 증숙후 바로 처리에 따른 미생물 오염을 최소화하고자 하였다. 냉장유통을 위하여 0, 4, 10℃에서 총균수, 대장균군, 수분함량, 관능변화검사, 물성변화, 색도변화를 측정하였다. 최장 21일간의 시험에서, 2종의 시료에서 총균수는 5.87±0.09 log를 넘지 않았고, 대장균군은 두 시료 모두 검출되지 않았다. 수분함량변화에서는 통팥찰떡과 녹두깨찰떡은 3가지 온도 모두에서 시간에 따라 유의하게 차이가 나지 않았다. 색도의 변화중 특히 L값의 변화가 저장기간 중 유의적 차이가 없었다. 또한 물성의 변화가 5% 미만을 유지하여 노화에 따른 변화가 나타나지 않았다. 다만 관능적 변화에서 통팥찰떡의 21일에 유의적인 저하를 보여, 최대 설정한 여러 품질지표 중「식품공전」규격에 따라 떡의 품질한계일을 설정하였다. 실험결과 떡의 품질한계일은 0℃에서 21일, 4℃에서 21일, 10℃에서18일로 산출되었다. 제품 유통 시 여러 가지 변수를 고려하고자 안전계수 0.8을 곱하여 최종 유통기한은 16일(0℃, 4℃), 14일(10℃)로 설정하였다. In this experiment, we set the expiration date to use the rice cake processing product as a substitute for home. Experiments were carried out on the brown rice cake and green bean curd rice cake. The rice cake was developed to be sealed to the tray immediately after boiling for convenience, and it was tried to minimize microbial contamination due to the treatment immediately after boiling. Total bacterial counts, coliform group, moisture content, sensory evaluation, physical properties, and chromaticity were measured at 0, 4, and 10℃ for refrigerated distribution. In the test for up to 21 days, the total number of bacteria in the two samples did not exceed 5.87 ± 0.09 log, and the two samples were not detected in the coliform group. The changes of moisture content did not show a significant difference in time between the three kinds of temperature. There was no significant difference in the L value among the changes of chromaticity during the storage period. Also, changes in physical properties were maintained at less than 5%, indicating no change due to aging. However, the sensory change showed a significant decrease in 21 of Korean sweet rice cakes, and the quality limit date of rice cakes was set according to the “Food Codes” standard among the maximum set quality indicators. The quality limit of rice cake was 21 days at 0℃, 21 days at 4℃ and 18 days at 10℃. The final shelf life was set to 16 days (0℃, 4℃) and 14 days (10℃) by multiplying the safety factor of 0.8 by various factors in product distribution.

공간디자이너와 소비자의 감성인식의 차이에 관한 연구 -브랜드 커피전문점 공간디자인을 중심으로-

유승진 ( Seung Jin Yoo ),이재규 ( Jae Kyu Lee ) 한국공간디자인학회 2014 한국공간디자인학회논문집 Vol.9 No.4

(연구배경 및 목적) 공간을 설계하는 데 있어 공간디자이너가 소비자들에게 인지시키고자 하는 디자인의 감성이 있기 마련이다. 또한 최근의 커피전문점은 양적인 증가와 함께 단순한 식음료공간이 아닌 문화공간으로서 변화하며 차별화된 감성적인 실내공간의 중요성이 대두되고 있다. 본 연구는 커피전문점을 중심으로 실내공간에 디자이너가 의도한 감성이 소비자에게 유익하게 전달되었는지에 관해 조사하여, 공간디자이너와 소비자 간의 차이를 보이는 감성을 찾아 분석하는 것을 목적으로 한다. (연구방법)국내에 대표 브랜드 커피전문점 4곳을 선정하여 공간디자이너와 소비자로구분된 독립표본을 대상으로 감성평가를 진행한다. 감성평가의 결과가 두집단 간의 유의미한 차이를 보이는지에 대한 분석을 위해 t검증과 회귀분석을 실시한다. (결과) 공간디자이너와 소비자가 인지하는 유의미한 차이를 보이는 감성이 존재한다. 이러한 감성어휘를 공간에서 연출하고자 하는주요 개념으로 사용할 경우, 공간디자이너는 소비자 관점에서 공간을 설계하여 보다 효과적인 공간을 구성할 수 있을 것이다. (Background and Purpose) There is an emotional aspect of design, and spatial designers attempt to connect the design of a space with their customers’ emotions. Nowadays, the importance of differentiated emotional spatial design has become important in coffee franchises, which have increased in number and which have transformed into cultural spaces, not merely spaces for food or beverages. This study was undertaken to determine how efficiently spatial designers intend to reach customers of coffee franchises; a further aim was to find out the emotional differences between spatial designers and customers. (Method) We selected four representative coffee franchises in Korea and conducted a survey to evaluate the emotions of spatial designers and customers in an independent sample. To determine if emotional differences between the two groups were meaningful, an independent t-test and regression analysis were performed. (Results) A difference regarding the recognition of emotion between spatial designers and customers was revealed. Using this finding as an important concept in designing space will enable spatial designers to plan more efficiently to design space from the customer’s point of view and emotions.

EPON망에서 OPNET을 이용한 주기적 폴링 기반의 동적 대역 할당 방법의 성능평가

유승진 ( Seung Jin Yoo ),최수일 ( Su Il Choi ) 전남대학교 전자통신기술연구소 2008 전자통신기술논문지 Vol.11 No.1

EPON망은 효율적이고 경제적인 광대역 가입자망이다. EPON망에서 개별 ONU에게 상향 대역을 할당하는 여러 가지 방법이 있는데, 효율적인 대역 할당을 위해 ONU간 통계적 다중화를 고려한 동적대역할당(DBA: Dynamic Bandwidth Allocation) 방안으로 여러 가지 알고리즘이 제시되었다. 본 논문에서는 DBA 방법 중 차등 CoS(Class of Service) 제공을 위한 주기적 폴링에 기반한 동적대역할당 방법을 이용하여 OPNET을 통한 시뮬레이션 모델을 구현하였다. 그리고 OPNET 시뮬레이션 모델을 통해 주기적 폴링에 기반한 동적대역할당의 필요성 및 유용함을 보였다. 본 논문에서 구현한 시뮬레이터는 EPON망에서 논의될 수 있는 여러 가지 기술적인 측정항목을 반영하여 모의 실험을 통해 성능평가 결과를 제시할 수 있을 것이다. Ethernet Passive Optical Networks(EPONs) are an efficient and a low-cost broadband access networks. In EPON network, there are many methods allocating upstream bandwidth to each ONU and many algorithms proposed for Dynamic Bandwidth Allocation(DBA) method considering static multiflexing between ONUs. In this paper, We develop simulation model for DBA based cyclic polling providing CoS(Class of Service) by using OPNET. We present that DBA method based cyclic polling is necessary and useful method by using OPNET simulator. We expect that this simulator can help to determine various parameters and to analyze statistics which are considered for designing EPON.

게인 스케쥴링을 이용한 견실 차량 횡 안정성 제어

유승한(Seung-Han You),조준상(Joon-Sang Jo),유승진(Seungjin Yoo),한진오(Jin-Oh Hahn),이교일(Kyo Il Lee) 한국자동차공학회 2005 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2005 No.11_2

This paper deals with the design of a feedback yaw rate controller based on gain-scheduled H∞ optimal control, which enables the reduction of sideslip as well as the prevention of vehicle rollover. The uncertain factors such as vehicle mass and cornering stiffness in the vehicle yaw rate dynamics naturally call for the robustness of the feedback controller, which leads to the application of H." optimization technique to synthesize a controller with guaranteed robust stability and performance against the model uncertainty. The lumped disturbance due to the parametric uncertainties is estimated using the disturbance observer to assess the correct value of the compensating yaw moment. The braking force distribution for generating artificial yaw moment is implemented by effective actuation of braking wheels. Simulation results indicate that the proposed gain-scheduled H∞ optimal yaw rate controller can decently improve the lateral stability of an automobile.

Lichtenstein 탈장 교정술과 Bassini 탈장 교정술의 임상성적 비교

이승훈(Seung Hoon Lee),김남일(Nam Il Kim),최승혜(Seung Hye Choi),윤상섭(Sang Seob Yun),이성(Seong Lee),유승진(Seung Jin Yoo),임근우(Keun Woo Lim),김재성(Jae Sung Kim) 대한외과학회 1999 Annals of Surgical Treatment and Research Vol.57 No.4

다중 주파수 재생을 위한 광대역 수중 음향 신호 증폭기 설계 연구

이동훈,유승진,김형문,김형남,Lee, Dong-Hun,Yoo, Seung-Jin,Kim, Hyeong-Moon,Kim, Hyoung-Nam 한국음향학회 2017 韓國音響學會誌 Vol.36 No.3

본 논문에서는 수중에서 운용하는 임베디드 능동 음향탐지 시스템에 적용하기 위한 광대역 송신 전력 증폭기 설계/제작/시험 과정에서 발생된 문제를 분석하고 해결방안을 제시한다. 최근 수중음향 분야에서도 탐지 성능을 향상시키기 위해 광대역 소나(Sound Navigation and Ranging, SONAR) 신호처리 연구가 진행되고 있으며 이를 위한 광대역 수중음향 송수신 장치 개발이 이루어지고 있다. 본 논문에서는 임베디드 시스템 특성상 복잡하지 않고 구현이 간단한 2 레벨 톱니파 형태의 Class D 급 PWM(Pulse Width Modulation) 신호 생성 방식을 사용하여 광대역 수중음향 신호를 생성한 이후에, 송신 증폭기를 통하여 다양한 형태의 송신 파형을 재생하고 수중에서 실험을 하는 과정에서 두가지 이상의 주파수를 가진 소나 신호를 동시에 재생한 경우, 원신호에 두 신호의 주파수 차의 정수배만큼 더해진 기생 주파수가 나타나는 현상이 발생하여 원하지 않은 송신 음원이 재생되는 문제가 있음을 발견하였다. 이러한 문제점의 원인을 분석하기 위해 MATLAB 및 Simulink를 이용하여 송신 하드웨어 및 PWM 제어 과정을 모델링하고 시뮬레이션 하였으며, 시뮬레이션을 통해 문제점을 재현하고 해결방안을 제시한다. The problem that occurred in the design/fabrication/testing of the wideband transmitting power amplifier for an embedded active SONAR (Sound Navigation and Ranging) system operating underwater was analyzed and the solution of the problem was proposed in this paper. Wideband acoustic SONAR systems had been developed in order to improve the underwater detection performance. The underwater acoustic transmission system had been also developed to achieve the wideband SONAR system. In this paper, the wideband acoustic transmission signal was generated using a 2 Level sawtooth type Class D PWM (Pulse Width Modulation) which was not complicated to implement. When the sonar signals having two or more frequencies were simultaneously generated, parasitic frequencies were added to the original signals by integer multiples of the frequency difference of the original signal. To cope with this problem, we proposed a way to remove the parasitic frequency from the source signal through modeling and simulation of the implemented power amplifier and PWM control hardware using MATLAB and Simulink.

충수돌기 점액낭종의 임상적 고찰

조진범(Jin Bum Cho),조항주(Hang Joo Cho),신옥란(Ok Ran Shin),김기환(Kee Hawn Kim),안창혁(Chang Hyeok Ahn),김정수(Jeong Soo Kim),유승진(Seung Jin Yoo),임근우(Keun Woo Lim),김지일(Ji Il Kim) 대한외과학회 2008 Annals of Surgical Treatment and Research(ASRT) Vol.74 No.6

Purpose: A mucocele of the appendix is an uncommon pathology, representing 0.2% to 0.3% of all appendix specimens. It is often diagnosed clinically as a result of its ability to cause signs and symptoms similar to those of acute appendicitis. If it is asymptomatic, it is often detected as an incidental finding during ultrasonography, computed tomography, radiographic examination of the gastrointestinal tract, or laparotomy. The purpose of this study was to identify the clinical features of mucocele of the appendix. Methods: We describe 35 cases of mucocele of the appendix diagnosed at Uijeongbu St. Mary’s hospital between January 1993 and December 2006. We analyzed demographic, clinical, and pathologic data of all the cases. Results: A total of 12 males and 13 females with mean age of 54.7±14.9 years are described. The peak incidence occurred in the seventh decade (34.3%). Sixteen patients presented with symptoms and signs similar to those found in acute appendicitis. Ten patients complained of a palpable mass, 2 patients complained of non-specific abdominal pain, and 7 patients were asymptomatic. Fourteen cases were diagnosed preoperatively, and 3 cases were discovered incidentally. Pathologic examination revealed mucosal hyperplasia in 20% of the cases, cystadenoma in 71%, and cystadenocarcinoma in 9%. The mean age of cystadenocarcinoma patients was older than the mean age of mucosal hyperplasia patients, and the diameter of the appendix was larger in cystadenoma patients than in mucosal hyperplasia patients. Conclusion: The preoperative diagnosis of appendiceal mucocele is very important to make in order to facilitate treatment planning and avoid inadvertent rupture of the mucocele during operation. We recommend more diagnostic studies in cases of suspected mucocele. Mucocele of the appendix must be included in the differential diagnosis of patients with pain in the right iliac fossa, patients older than 40 years of age, patients suffering from long-term symptoms, and patient with a palpable mass in the right iliac fossa.