• Journal of Ocean Engineering and Technology
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• v.32 no.1
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• pp.68-75
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• 2018

This study deals with the heading angle and depth keeping control technique for an ROV with multiple horizontal and vertical thrusters by thrust allocation. The light work class ROV URI-L, which is under development at KRISO, is a redundant actuating system with multiple thrusters that are larger than the ROV's degree of freedom. In the redundant actuating system, there are several solutions for a specific ROV motion to be performed. Therefore, a thrust allocation algorithm that considers the entire propulsion system should be regarded as important. First, this paper describes the propulsion system of the ROV and introduces the thrust allocation method of each motion controller. In addition, the performance of the controller is examined using a heading angle and depth keeping control test in a stationary state.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.38A no.6
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• pp.520-527
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• 2013

In this paper, a joint cell grouping and user association technique proposed for a semi-dynamic grouped network MIMO in a clustered heterogeneous cellular network (HCN). With the conventional macro BSs, small cells are being overlaid to increase a spectral efficiency per area and these small cells are expected to be concentrated to support exponentially increasing data traffic in hot spot areas. The main culprits of performance degradation in the clustered HCN are interference and load imbalance. The proposed scheme jointly handles them to maximize a proportional-fair metric. It is shown that the proposed technique can largely improve user average rate and proportional fairness among users than any other conventional schemes in the clustered HCN.

• Pediatric Gastroenterology, Hepatology & Nutrition
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• v.3 no.2
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• pp.212-216
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• 2000

Subacute necrotizing lymphadenitis was first reported by Kikuchi and Fujimoto in 1972. Young females no more than 30 years of age are mainly affected. It usually manifests as fever and cervical lymphadenopathy. We experienced one case of subacute necrotizing lymphadenitis with hepatic complication in an 11-year-old boy. Symptoms presented were URI signs, diarrhea, headache, and weight loss along with fever and cervical lymphadenopathy. Elevated serum AST/ALT levels were also noted up to 682/1560 (IU/L) and were normalized within one month. We performed aspiration biopsy of the liver twice (at admission and 5 months thereafter). The hepatic histopathologic findings were nonspecific.

• Journal of Chest Surgery
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• v.22 no.1
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• pp.59-66
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• 1989

Coarctation of aorta, a well known congenital cardiovascular defect, can be recognized in the most instances by simple finding of physical examination. This condition shortens life if untreated, but it can be corrected surgically to render the patient functionally normal. It seems relatively rare in Asian. During Six-Year period from January, 1982 through June, 1988, twenty four consecutive operations for the coarctation of the aorta were performed at Yonsei Medical Center. The patients included 14 males and 10 females in the range, 2 months and 34 years old. Associated Cardiac anomalies were patient ductus arteriosus, ventricular septal defect, mitral valve regurgitation, aortic stenosis, double outlet right ventricle, corrected transposition of great vessel, etc. The preoperative main symptoms were frequent URI and dyspnea. Congestive heart failure was the most common symptom at the group younger than 2 year olds. Operative techniques for the coarctation of the aorta were prosthetic patch aortoplasty in 18 patients, resection & vascular graft interposition in 4, resection and end to-end anastomosis in 2. There was no operative death. Four patients had persistent or paradoxical hypertension, and one had postoperative paraplegia.

• Clinical and Experimental Pediatrics
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• v.52 no.3
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• pp.269-276
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• 2009

Viruses are the most common cause of lower respiratory tract infections (LRTIs) in infants and young children and are a major public health problem in this age group. Viruses were identified in 54.9-70.4% of hospitalized infants and children with LRTIs in Korea. The viral pathogens identified included respiratory syncytial virus (RSV) A and RSV B, influenza (Inf) A, Inf B, parainfluenza (PIV)1, PIV2, human bocavirus (hBoV), human rhinovirus (hRV), adenovirus (ADV), human metapneumovirus (hMPV), human coronavirus (hCoV)-OC 43, hCoV-229E, hCoV-NL63, hCoV-HKU1, and human enterovirus (hEV). Coinfections with ${\geq}$2 viruses were observed in 11.5-22.8% of children. The occurrence of LRTIs was the highest in the first year of life. The specific viruses are frequently associated with specific clinical syndromes of LRTIs. LRTIs caused by RSV were predominant among younger infants. hRV accounted for a larger proportion of LRTIs in young infants than ADV and hBoV. hMPV was frequently detected in children >24 months old. The number of hMPV infections peaked between February and May, whereas hRV was detected throughout the year. Thus far, hCoV is a less common respiratory pathogen in cases of ALRI and URI in Korean children.

• Journal of Internet of Things and Convergence
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• v.2 no.1
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• pp.1-6
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• 2016

The IOT environment, people connected to the network, object, everything such as space (Things) generates data in real time. The information between the object collecting, sharing, are utilized. Currently health care, research in various fields such as smart home has been promoted. Also appeared concepts emphasized all things(IOE) Internet connection between the geographic space and the Internet. Human, while important connections between the objects, such as objects, studies of efficient and secure authentication technologies have been developed. In this paper, we propose a RADIUS (Remote Authentication Dial In User Service) protocol for improved mutual authentication between each object in the IOT environment.

• The Journal of Pediatrics of Korean Medicine
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• v.20 no.1
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• pp.195-206
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• 2006

Objective : The purpose of this study is to investigate the current trends of children patients with convulsion. Children convulsion patients who visited the Pediatric Department of the Oriental Medicine hospital were investigated and analyzed. Method : 90 children complaining convulsion who visited the Department of Pediatrics of Kyung Hee University Oriental Medicine Hospital, between March, 2005 and October 2005 were statistically analyzed. Results : The percentage of boys outnumbered the girls. The percentage of children under the age of 5 18 66.7%. The percentage of children with family history is 43%. The majority of children had visited the hospital twice (n=21). As for intercurrent diseases, there were URI, C.P., ADHD, CHD, sequela of encephalitis and etc. As for the result of EEG examinations, 25 children were normal and 18 were abnormal. As for the appearance of seizures, Tonic-Clonic seizure was the most common seizure among the children (n=13). As for the type of convulsion, simple febrile convulsion was the most common (n=35). As for the curative effect. the percentage of children who showed improvement to treatment was 41.2%. Jangdambosintang, sunbangpaedoktang, gamichodeungeunm, gamichungeumchowitang and etc were the most frequently prescribed medicines.

• Proceedings of the Korea Contents Association Conference
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• 2013.05a
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• pp.73-74
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• 2013

차세대 웹 기술인 시맨틱 웹(Semantic Web)이 각광을 받음에 따라, 시맨틱 웹과 관련된 다양한 기술들이 활발히 연구되고 있다. 특히, 시맨틱 웹의 핵심 사례인 링크드 데이터(Linked Data)는 웹으로 접근 가능한 형태의 URI로 시맨틱 데이터를 표현하고 서로 연결함으로써, 오픈 데이터로서 상호운용성 극대화 및 데이터의 통합을 용이하게 한다. 이는 바이오인포매틱스 기술 발전과 결합하여 웹에서 바로 이용 가능한 많은 의학 링크드 데이터 생산과 이를 활용한 다양한 의학용어 검색 서비스 개발 결과를 가져왔다. 하지만, 기존 의학용어 검색 서비스들은 각 기관이 보유하고 있는 의학정보를 기반으로 서비스되기 때문에 다양하고 정확한 정보를 얻기 위해서는 많은 시간과 노력을 투자해야 한다. 그래서 본 논문에서는 척추 분야 의학 관련 링크드 데이터를 활용해 정확도가 높고 확장이 용이한 척추정보 검색 서비스를 제안한다.

• Journal of Chest Surgery
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• v.24 no.1
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• pp.1-7
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• 1991

This report describes our 10-year experience with intracardiac repair in 42 patients older than 16 year with tetralogy of Fallot. The mean age was 22.0$\pm$5.18 years[range 16~41]. The preoperative clinical manifestations were cyanosis & clubbing[93%], frequent URI [55%], anoxic spell[40%], pulmonary tuberculosis[21%], tuberculous empyema[7%], chronic renal failure[7%], congestive heart failure[7%] and subacute bacterial endocarditis [2%], etc. The previous shunt procedure for palliation had been performed in 7 patients. The type of VSD were typical perimembranous type[67%], total canal defect[28%] and combined type[5%]. The right ventricular outflow tract obstruction were combined type[69%], infundibular type[21%] and valvular type[10%]. Transannular patch was used in 50% of patients. Associated cardiovascular anomalies were ASD[33%], PFO[31%], Rt. aortic arch[10%], Lt. SVC[10%], single Rt. pulmonary artery, single Lt. coronary artery, ASI, proximal stenosis of Rt. pulmonary artery and anomalous systemic venous return, etc. Hospital mortality was 7.1%[3 cases]in overall. The causes of hospital deaths were revealed low cardiac output & acute renal failure[2 cases], postoperative bleeding[1 case]. There were 2 late deaths 3 & 68 months after surgery. Residual intracardiac shunt was detected in 2 patients. one patient was successfully reoperated and another patient had Qp /Qs ratio less than 1.5.

• Journal of Chest Surgery
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• v.27 no.1
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• pp.72-75
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• 1994

The esophageal hiatal hernia is a rare disease in Korea especially in children and infant. We experienced a case of type III esophageal hiatal hernia in 9 months female. She had no specific past history and familial history except recurrent URI and postprandial habitual vomiting. The chest X-ray and Barium swallowing showed herniated stomach in Rt. thoracic cavity and posterior mediastinum. We performed modified Belsey Mark IV procedure with using the 3-0 and 4-0 Pledgeted Ticrons. In operative field, the stomach cardia portion was herniated into the Rt.thoracic cavity and posterior mediastinum with elevation of the esophagogastric junction above the diaphragm. But there was no evidence of short esophagus and combined anomaly. The postoperative courses were uneventful and good without specific complication for about 5 months to this point.