Design and Implementation of Multiple Control Server for Telemedicine Service

We can adapt telemedicine systems in advancement of information technology capabilities and increase of network bandwidth. The telemedicine service can be applied to a public health center, a school, a prison and islands in lacks of medical equipments and medical staffs. The telemedicine services which can be provided high quality medical services. We designed the multiple control server system consisting 3 sub-function, patients and doctors name list, network types, connection states and computer equipments. The telemedicine link configuration was decided as ‘Flowing’, or ‘By-passing’ in accordance the network type and bandwidth of patient systems or doctor systems. The multiple control server system was performed the best communication configuration over heterogeneous networks. This system was achieved high quality telemedicine services through dynamic wired and wireless networks at any time. This study represented a hybrid multimedia telemedicine system over heterogeneous networks. We expected that the designed system could provide not only the high quality services, tele-diagnosis and tele-consultation, but also the effective emergency telemedicine services to multi-patients in the heterogeneous network environments.ope

Parallel-connected convolutional neural network with minority and majority feature extraction for the estimation of the remaining useful life of turbofans

The prediction of remaining useful life (RUL) plays a crucial role in assessing the condition of a machine before it completely fails, ensuring performance by the execution of preventive maintenance beforehand. Recently, various deep learning models have been frequently used for RUL estimation, and they have shown good performance. However, these deep learning models face several challenges such as inefficiency owing to the selection of complex preprocessing methods, overfitting owing to model complexity, and other unresolved issues. Therefore, this study proposes a new deep-learning-based approach to address these issues by constructing a novel structure that includes a simple preprocessing step, minority feature extraction module, and majority feature extraction module. First, it explains the relatively simple preprocessing and assumptions regarding the target data of an undefined training set. Second, we describe the design of a convolution-based model using minority and majority feature extraction modules created through 2D convolutional layers. This model can learn the relationships between minority and majority sensors over time. By connecting the modules in parallel, it aggregates various types of information using multiple features from a single dataset. Finally, we present various experiments on the proposed algorithm and compare it with the latest existing methods using the NASA C-MAPSS dataset.TRUEkcikci_cand

Design of Real-time Ambulance Location Monitoring System using Open API and GPS Based on Web 2.0

Objective: The term "Open API" has been recently in use by recent trends in social media and web 2.0. It is currently a heavily sought after solution to interconnect Web sites in a more fluid user-friendly manner. We could have many benefits easily development and high efficiency. In this paper, Real-time ambulance location monitoring system including Integrated Maps was designed by using Maps Open API based on Web 2.0. Methods: Integrated Maps were used by using Google Maps Open API and Naver Maps Open API respectively. GPS Web Browser was implemented to present integrated Maps on the designed system continuously. The development environments of the designed systems were C# and ASP.NET Platform. Results: The designed systems contained three parts composed to Integrated Maps, Ambulance System, and Center Monitoring System respectively. Integrated Maps could offer Satellite, Map and Hybrid typed maps at Real-time Ambulance Location Monitoring System. Conclusion: Real-time Ambulance Location Monitoring System could be developed with low cost using a Open API at available emergency situations. We expect to more using Open API in medical systems.ope

Customized Estimating Algorithm of Physical Activities Energy Expenditure using a Tri-axial Accelerometer

The research has increased the role of physical activity in promoting health and preventing chronic disease. Estimating algorithm of physical activity energy expenditure was implemented by using a tri-axial accelerometer motion detector of the SVM(Signal Vector Magnitude) of 3-axis(x, y, z). COUNT method has been proven through experiments of validity Freedson, Hendelman, Leenders, Yngve was implemented by applying the SVM method. A total of 10 participants(5 males and 5 females aged between 20 and 30 years). The activity protocol consisted of three types on treadmill; participants performed three treadmill activity at three speeds(3, 5, 8 km/h). These activities were repeated four weeks. Customized estimating algorithm for energy expenditure of physical activities were implemented with COUNT and SVM correlation between the data.ope

An Empirical Study on the Signalling Effects of Free Bonus Issue

무상증자는 자본의 추가 유입 없이 자본계정 내의 항목 대체를 통해 이루어지는 증자정책이다. 본 연구에서는 2000년 4월부터 2017년 12월까지의 기간을 대상으로 무상주 발행기업의 공시정보가 주가수익률 및 거래량에 미치는 효과를 검증하였다. 또한, 글로벌금융위기라는 시장 변수가 공시효과에는 어떤 변화를 가져오는지 비교 분석하였다. 무상증자로 상승한 주가수익률은 기업의 어떤 재무특성에 의해 영향을 받는지 알아보기 위해 회귀분석을 실시하였다. 연구결과, 공시일 10일 이전부터 유의적인 초과수익률이 발견되었다. 초과수익률은 점차 감소하여 공시일 이후에는 변화 발생기간 이전과 같은 수준으로 회복한다. 이 같은 현상은 정보 사전유출의 영향으로 정보효과가 공시 이전부터 발휘된 결과라고 해석할 수 있다. 무상증자 공시에 따른 거래량의 변화는 공시일을 기점으로 급상승하였다가 10여 일에 걸쳐 감소하는 변화 양상이 관찰되었다. 글로벌금융위기를 기준으로 무상증자 공시에 따른 누적초과수익률은 이전과 이후에 큰 변화가 발견되지 않았다. 이는 투자시장 위축이 무상증자 정보에 대한 기대를 낮추기에는 무상증자 공시에 대한 평판이론이 강하게 작용하고 있다고 유추할 수 있다. 초과수익률과 기업특성에 대한 실증연구 결과, 기업규모가 작고 시장민감도 낮을수록 초과수익률이 더 높게 나타나는 것으로 관찰되었다. 또한, 증자비율과 부채비율이 높을수록 초과수익률과 정(+)의 관계가 나타난다는 것을 알 수 있다. 본 연구의 결과는 기업의 어떤 재무요인이 초과수익률의 증가와 유관한지 보여주고 있다.;Free Bonus Issue increases capital by modifying items in the capital account without introducing additional capital. This study examines the effects of information disclosures by bonus issuing firms on stock returns and trading volumes between April of 2000 and December of 2017. In addition, this study comparatively analyzes how the market factor in the form of global financial crisis influenced the announcement effect. Regression analysis has been conducted to examine which financial characteristics of the firms affect stock returns that have increased as results of bonus issues: This research has identified statistically significant level of abnormally high returns from ten days prior to announcements. These abnormal returns gradually decreased over time and returned to previous levels after disclosure days. These phenomena can be interpreted as announcement effect coming into effect prior to actual announcements due to information leaks. Increase in trading volumes due to announcements of bonus issues soared at disclosure days and gradually decreased over approximately the next ten days. There were no statistically significant differences between cumulative abnormal returns due to bonus issue announcements before and after the global financial crisis. It can be inferred that the effects outlined in the reputation theory regarding bonus issue announcements had such a strong influence that even a shrinking investment market could not outweigh. An empirical study on excess returns and firm characteristics led to the observation that excess returns tend to be higher when firms are smaller and are less sensitive to the market. Also, excess returns tended to be higher when debt ratio and ratio of capital increase were higher. These results show which financial characteristics are relevant to increases in excess returns.Ⅰ. 서론 1 A. 연구의 목적 1 B. 연구의 방법 2 Ⅱ. 무상증자 일반론 4 A. 무상증자의 정의 및 특성 4 1. 무상증자의 정의 4 2. 무상증자의 발행 5 3. 무상증자의 발행목적 7 4. 무상증자의 영향 8 5. 유사 주식변동사항과의 비교 8 B. 무상증자에 대한 이론적 가설 11 1. 무정보 효과가설 (No Information Content Hypothesis) 11 2. 최적거래범위가설 (Optimal Trading Price Range Hypothesis) 11 3. 유동성 가설 (Liquidity Hypothesis) 12 4. 신호화 동기가설 (Signaling Motive Hypothesis) 12 Ⅲ. 무상증자 관련 선행연구 15 A. 국외연구 15 B. 국내연구 16 Ⅳ. 가설설정 및 연구방법 19 A. 연구가설 설정 19 B. 연구대상 및 자료수집 21 C. 연구모형과 분석방법 23 1. 초과수익률(Cumulative Abnormal Return) 계산 23 2. 거래량 변동성 계산 25 3. 회귀분석을 통한 주가변동 요인분석 25 Ⅴ. 실증분석 결과 29 A. 사건연구 분석결과 29 1. 주가에 미치는 영향 29 2. 거래량의 변화 31 3. 글로벌금융위기 전후 수익률 변화 35 B. 횡단면연구 분석결과 37 Ⅵ. 결론 및 논의 39 A. 연구결과 요약 39 B. 한계점 및 향후 연구방향 40 참고문헌 42 (부록) 44 ABSTRACT 5

Neuroprotective constituents of Cornus officinalis fruits

학위논문(석사) --서울대학교 대학원 :약학과,2007.Maste

(A)study on correction generation algorithms for wide area differential GNSS

학위논문(박사) --서울대학교 대학원 :기계항공공학부,2007.Docto

초기 레벨링 단계에서 치아 변위에 따른 일반 설측 브라켓과 자가결찰 설측 브라켓의 마찰력 특성 비교에 관한 연구

학위논문 (박사)-- 서울대학교 대학원 : 치의학과, 2016. 8. 백승학.목적: 본 연구의 목적은 일반 설측 브라켓 (7th Generation, Ormco, Orange, CA, USA), 브라켓 폭을 줄인 일반 설측 브라켓 (STb, Ormco)과 자가결찰 설측 브라켓 (In-Ovation L, Dentsply GAC International, NY, USA) 에서 레벨링과 배열용 나이타이 호선을 사용하였을 때 치아변위가 마찰력에 미치는 효과를 평가하기 위함이다. 연구재료 및 방법: 브라켓은 7th Generation 결찰 설측 브라켓, STb 결찰 설측 브라켓과 In-Ovation L 자가결찰 설측 브라켓을 사용하였다. 치아의 변위는 상악 우측 측절치의 2 mm 구개측 변위 (palatal displacement), 상악 우측 견치의 2 mm 치은측 변위 (gingival displacement), 비변위 (대조군, control) 로 하여 총 9군으로 구성하였다. 치아의 치관, 치근, 치주인대의 형태를 Stereolithography apparatus (SLA) 공법으로 재현한 타이포돈트를 인스트론 (Model 4466, Instron, Canton, MA, USA) 에 고정시켰다. 브라켓 슬롯에 인공타액을 분사하고 0.013 inch Cu-NiTi호선을 삽입한 후 36.5°C 에서 호선을 0.5 mm/min의 속도로 5 분간 당기면서 정지마찰력 (static frictional force, SFF) 과 운동마찰력 (kinetic frictional force, KFF) 을 측정하였다. 정규성검정을 위해 Shapiro-Wilk 검정을 사용하였다. 치아 변위와 브라켓간의 상관관계를 위해 이원배치분석을 사용하였다. 치아변위와 브라켓 각각의 효과를 알아보기 위해 Levene 의 등분산 가정이 성립되면 일원배치분석 및 사후검정으로 Tukey`s HSD (honest significant difference) 를 사용하고 등분산 가정이 성립이 되지 않으면 Welch 일원배치분석 및 사후검정으로 Dunnetts T3 방법을 사용하여 통계처리하였다. 결과: 이로부터 다음과 같은 결과를 얻었다. (1) In-Ovation L은 7th Generation 과 STb에 비해 비변위시 가장 낮은 정지마찰력이 보였으며 변위시에서도 가장 낮은 운동마찰력을 보였다. (P<0.001) (2) 상악 측절치 2mm 구개측 변위와 상악 견치 2mm 치은측 변위시 In-Ovation L과 STb의 정지마찰력에서는 유의한 차이가 없었다 (P<0.001) (3) 7th Generation, STb와 In-Ovation L은 상악 측절치 2mm 구개측 변위보다 상악 견치 2mm치은측 변위에서 높은 정지마찰력과 운동마찰력이 나타났다. (P<0.001) 결론: STb는 치아 변위시 In-Ovation L과 비슷한 정지마찰력을 나타내고 높은 운동마찰력을 나타내므로 초기 레벨링과 배열 단계에서 정지마찰력과 운동마찰력이 자가결찰 설측 브라켓 수준으로 낮아지도록 일반 설측 브라켓과 결찰 방법을 개발하는 것이 필요하다.Objective: The purpose of this in vitro study was to evaluate the effects of tooth displacement on frictional properties when conventional ligating lingual brackets (7th Generation), conventional ligating lingual brackets with a narrow bracket width (STb), and self-ligating lingual brackets (In-Ovation L) were used with initial leveling and alignment wires. Materials and methods: 7th Generation brackets, STb brackets, and In-Ovation L brackets were tested under three tooth displacement conditions: no displacement (control)a 2-mm palatal displacement (PD) of the maxillary right lateral incisor (MXLI)and a 2-mm gingival displacement (GD) of the maxillary right canine (MXC) (nine groups, n = 7 per group). A stereolithographic typodont system and artificial saliva were used. Static and kinetic frictional forces (SFF and KFF, respectively) were measured while drawing a 0.013-inch copper-nickel-titanium archwire through brackets at 0.5 mm/min for 5 minutes at 36.5°C. Results: The In-Ovation L group exhibited lower SFF under control conditions and lower KFF under all displacement conditions than the 7th Generation and STb groups (all P < 0.001). No significant difference in SFF existed between the In-Ovation L and STb groups for a 2-mm gingival displacement of the MXC and 2-mm palatal displacement of the MXLI. A 2-mm gingival displacement of the MXC produced higher SFF and KFF than a 2-mm palatal displacement of the MXLI in all brackets (all P < 0.001). Conclusion: STb brackets exhibited similar SFF and higher KFF than In-Ovation L brackets under tooth displacement conditions. Conventional ligating lingual brackets and ligation methods should be developed to produce SFF and KFF as low as those in self-ligating lingual brackets during the initial and leveling stage.I. Introduction 1 II. Review of literature 4 III. Materials and methods 11 IV. Results 16 V. Discussion 18 VI. Conclusions 24 References 25Docto

상악 제2대구치 발거에 따른 치료 변화의 분석

학위논문(석사)--서울대학교 대학원 :치의학과 치과교정학전공,2004.Maste

뮤온입자의 자기쌍극자모멘트 이상과 그에 대한 홀로그래픽 QCD 이론의 연구

학위논문 (박사)-- 서울대학교 대학원 : 물리·천문학부(물리학전공), 2011.8. 김형도.Docto