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유병철(Byung-Chul You),조인희(In-Hee Cho) 한국엔터테인먼트산업학회 2014 한국엔터테인먼트산업학회 학술대회 논문집 Vol.2014 No.5
본 연구의 목적은 뉴스 특보가 보도전문채널의 시청률 변화에 어떤 영향을 미치는지를 알아보는 것이다. 분석을 위해 세월호 침몰 사고 기간의 뉴스Y(연합뉴스TV) 뉴스 특보 시청률를 분석했다. 사고 이전과 사고 이후 특보 체제, 종일 특보 이후로 기간을 설정해 비교분석했다. 연구 결과 특보 이후 시청률이 증가했고, ‘특보-특보 후’를 제외하곤 모두 통계적으로 유의한 차이가 있었다. 시청자 층에서도 젊고, 고소득, 고학력 시청자들의 시청률이 높아졌다. 탐색적으로 홈페이지 PV(page view)를 분석한 결과 ‘특보 전-특보’ 기간의 차이가 나타났다 The object of this study is to analyze how breaking news reports effect the broadcaster"s rating. In order to get this analysis, this study drew a comparison and analyzed "News Y"(Yonhapnews TV)"s special reports, during the Sewol ferry disaster. News Y"s rating was caompared before covering the Sewol ferry disaster after the covering these reports and analyzed the channel rating. This study concluded that News Y"s rating was increased after covering the disater. Special news reports were a great factor to program rating in the news channel.
유병철 ( Byung Chul You ),정승원 ( Soung Won Jeong ),장재영 ( Jae Young Jang ),구소미 ( So Mi Goo ),김상균 ( Sang Gyune Kim ),김영석 ( Young Seok Kim ),전찬홍 ( Chan Hong Jeon ),진윤미 ( Yoon Mi Jeen ) 대한소화기학회 2012 대한소화기학회지 Vol.59 No.1
Systemic sclerosis (SSc) is a chronic systemic disease that affects the skin, lungs, heart, gastrointestinal tract, kidneys, and musculoskeletal system. Although up to 90% of patients with scleroderma have been estimated to have gastrointestinal involvement, liver disease has been reported only rarely. A 51-year-old woman was hospitalized due to esophageal variceal bleeding. Her serum was positive for anti-nuclear antibody and anti-centromere antibody. Sclerodactyly was noted on both hands, and she had recently developed Raynaud`s syndrome. Punch biopsy of the hand showed hyperkeratosis, regular acanthosis, and increased basal pigmentation in the epidermis, and thick pale collagenous bundles in the dermis. Liver biopsy showed chronic active hepatitis with bridging fibrosis. Consequently, she was diagnosed with liver cirrhosis due to autoimmune hepatitis (AIH) combined with SSc. AIH had subsided after administration of prednisolone at 40 mg per day. She received 5-10 mg/day of prednisolone as an outpatient, and her condition has remained stable. Patients with either AIH or SSc should be monitored for further development of concurrent autoimmune diseases. The early diagnosis of AIH combined with SSc will be helpful in achieving optimal management. (Korean J Gastroenterol 2012;59:48-52).
유도초음파를 이용한 강관보강다단 그라우팅의 건전도 평가
홍영호,유정동,변용훈,장현익,유병철,이종섭,Hong, Young-Ho,Yu, Jung-Doung,Byun, Yong-Hoon,Jang, Hyun-Ick,You, Byung-Chul,Lee, Jong-Sub 한국터널지하공간학회 2013 한국터널지하공간학회논문집 Vol.15 No.3
강관보강다단 그라우팅은 터널공사에 널리 적용되는 공법으로, 터널지반의 안정성 증대 및 차수효과를 얻을 수 있다. 본 연구의 목적은 유도초음파를 이용한 강관보강다단 그라우팅의 건전도 평가 기법을 제시하고, 현장 적용성을 평가하는 것이다. 강관의 그라우팅 충진률에 따른 주파수 변화를 파악하기 위해 실내실험 (자유구속조건 및 지중근입조건)을 수행하였으며, 건전도 평가시스템의 현장 적용성을 검증하기 위해 현장실험을 수행하였다. 강관의 두부를 해머로 타격하여 유도초음파가 발생되며, 발생된 유도초음파는 선단에서 반사되어 두부로 되돌아 온다. 반사된 유도초음파는 두부에 설치된 AE센서에 의해 수신된다. 강관보강다단 그라우팅의 건전도 평가 모델은 충진률 25 %, 50 %, 75 %, 100 %로 제작되었으며, 자유구속조건 및 지중근입조건의 실내실험으로 수행되었다. 신호처리를 위해 고속 푸리에 변환과 웨이브렛 변환을 수행하였다. 실내실험 결과, 유도초음파의 전파속도 변화는 크지 않았으나, 그라우팅 충진률에 따른 주 주파수의 변화가 뚜렷하게 나타났다. 강관보강다단 그라우팅의 충진률이 증가할수록 반사파의 주 주파수의 크기가 감소했다. 현장실험은 이미 설치된 강관보강다단 그라우팅에 대해 수행되었으며, 실내실험과 동일한 기법으로 분석하였다. 현장 조건의 실험체에서도 유도초음파의 반사파를 쉽게 수집할 수 있었으며, 이에 대한 주파수 영역에 대한 분석도 가능했다. 본 연구의 결과는 유도초음파를 이용한 주파수 분석 기법은 강관보강다단 그라우팅 건전도 평가에 효과적인 방법이 될 수 있음을 보여준다. Umbrella arch method (UAM) used for improving the stability of the tunnel ground condition has been widely applied in the tunnel construction projects due to the advantage of obtaining both reinforcement and waterproof. The purpose of this study is to develop the evaluation technique of the integrity of bore-hole in UAM by using a non-destructive test and to evaluate the possibility of being applied to the field. In order to investigate the variations of frequency depending on grouted length, the specimens with different grouted ratios are made in the two constraint conditions (free boundary condition and embedded condition). The hammer impact reflection method in which excitation and reception occur simultaneously at the head of pipe was used. The guided waves generated by hitting a pipe with a hammer were reflected at the tip and returned to the head, and the signals were received by an acoustic emission (AE) sensor installed at the head. For the laboratory experiments, the specimens were prepared with different grouted ratios (25 %, 50 %, 75 %, 100 %). In addition, field tests were performed for the application of the evaluation technique. Fast Fourier transform and wavelet transform were applied to analyze the measured waves. The experimental studies show that grouted ratio has little effects on the velocities of guided waves. Main frequencies of reflected waves tend to decrease with an increase in the grouted length in the time-frequency domain. This study suggests that the non-destructive tests using guided ultrasonic waves be effective to evaluate the bore-hole integrity of the UAM in the field.
이식 후 신기능 상실로 혈액투석을 시작한 환자에서 뇌경색을 동반한 감염성 심내막염 1예
정희재 ( Hee Jae Jung ),유병철 ( Byung Chul You ),명유식 ( Yu Sik Myung ),김은정 ( Eun Jung Kim ),박무용 ( Moo Yong Park ),최수정 ( Soo Jeong Choi ),김진국 ( Jin Kuk Kim ),황승덕 ( Seung Duk Hwang ),고은석 ( Eun Suk Koh ),허균 ( 대한신장학회 2011 Kidney Research and Clinical Practice Vol.30 No.5
Infective endocarditis is a dreaded complication in dialysis or kidney transplantation patients, with high morbidity and mortality. Despite the improved early survival of the transplanted kidney with new immunosuppressive agents, the number of patients returning to dialysis after a failed renal allograft is increasing. There is no consensus on the optimal management of immunosuppression in patients with a failed allograft. Continued immunosuppression is associated with infection, and the rapid discontinuation of immunosuppression may lead to acute rejection. Therefore, it is important to taper the immunosuppression properly in patients with a failed renal allograft. We report on a hemodialysis patient with a failed renal allograft who had a cerebral infarction following infective endocarditis. The patient was treated successfully with antibiotics and valve replacement.
Grinder와 Oscilloscope를 利用한 機械材料의 識別에 關한 硏究(Ⅰ)
柳炳哲 군산대학교 1968 群山水産專門大學 硏究報告 Vol.2 No.1
In order to operate a machine without delay or to handle easily its component parts when it requires the urgency of repair, we are necessary enough to be able to descriminate what are the materials of it. Until at present, we have made use of a microphotograph to discern a thing from another. Here the other two methods are given as follows besides the above. 1. Using a grinder; When a part of machines is ground by the tachometer having a circular velocity 29,4m/sec, the flame has d variety of color, thick and thin, density etc. 2, Using an oscilloscope : After the various types of wave which sounds through the grinding are recorded the photographs of them are obtained by the oscilloscope. Then each sound wave which has a difference is figure out. Now grinder and oscilloscope both do lots of important work to distinguish some materials of a machine. In the future if we should collect many kinks of the machine ports and have a continuous observation, we could recognize the relations between carbon content and flame or sound wave.
박강판(薄鋼板)의 Gas용접에서 일어나는 용접단(溶接端)의 간격에 관한 고찰(Ⅱ) : 제관(製管)에 對하여
유병철 군산대학교 1970 群山水産專門大學 硏究報告 Vol.4 No.1
When a light sheet-steel which has 1mm: thickness is made into various pipes such as funnels and tanks, the method of the oxy-acetylene welding is used for being faster and more efficient. First, the light sheet-steel needed for making pipe is ail·on to cut off according to the size by the squaring shear and to make it roll into a cylindrical shape by the slip roll forming machine. After that both sides of one end are fired slightly and let the other end have a suitable interval tailing account for the revolving strain, the abode welding is operated with weld speed 15mm/min, tip size 50, Pressure of oxygen 2kg/㎠, and diameter of welding rod 3mm. Here the several intervals(Imm) have been resulted in the following ; ***** D; Diameter of pipe. (cm) L; Length of pipe. (cm)