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고농도 중수소화 팔라디움(α'-PdDx) 의 저온영역 초음파 감쇄
조영신 대한금속재료학회(대한금속학회) 1990 대한금속·재료학회지 Vol.28 No.1
The ultrasonic attenuation of low temperature peaks in the PdD_(.67) has been studied. The peak is seen only for longitudinal waves, not for transverse ones, and it is observed only in the deuterides, not in the hydrides. The low temperature peak is correlated with relaxation phenomenon due to redistribution of LO phonons by ultrasonic waves. Ultrasonic attenuation of the PdD_(.67)H_(.02) sample was measured to see the influence of hydrogen in the PdD_(.67); the low temperature peaks of the PdD_(.67)H_(.02) and the PdD_(.67) do not show significant, difference within the limit of experimental error. Ultrasonic attenuations of the PdD_x(x=0.64-0.72) are decreased as the deutrium concentration increased.
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Electrohydraulic Lithotripsy of an Impacted Enterolith Causing Acute Afferent Loop Syndrome
조영신,이태훈,Soon Oh Hwang,Sunhyo Lee,정윤호,정일권,박상흠,김선주 대한소화기내시경학회 2014 Clinical Endoscopy Vol.47 No.4
Afferent loop syndrome caused by an impacted enterolith is very rare, and endoscopic removal of the enterolith may be difficult if a stricture is present or the normal anatomy has been altered. Electrohydraulic lithotripsy is commonly used for endoscopic fragmentation of biliary and pancreatic duct stones. A 64-year-old man who had undergone subtotal gastrectomy and gastrojejunostomy presented with acute, severe abdominal pain for a duration of 2 hours. Initially, he was diagnosed with acute pancreatitis because of an elevated amylase level and pain, but was finally diagnosed with acute afferent loop syndrome when an impacted enterolith was identified by computed tomography. We successfully removed the enterolith using direct electrohydraulic lithotripsy conducted using a transparent cap-fitted endoscope without complications. We found that this procedure was therapeutically beneficial.
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조영신,김도균,최상천,안정환,정윤석,김기운 대한응급의학회 2010 大韓應急醫學會誌 Vol.21 No.3
Purpose: The cancellation of reception in emergency department (ED) in Korea is similar to leaving without being seen in another country. But there are differences. We studied the actual conditions and reasons for cancellation of reception in the ED in each of several hospitals. Methods: Thirty-six emergency centers and one hundred sixty-seven emergency physicians participated in this survey. We obtained information through a questionnaire about total hospital bed counts, emergency center bed counts, number of emergency physicians, number of cancellations of reception for one day, and emergency physicians'opinions about cancellation of reception. Also, we prospectively investigated reasons for cancellation of reception for emergency physicians and patients. We recorded the reason for cancellation of reception at the time of cancellation and then interviewed the patient by telephone within 10 days after their leaving the ED. Results: Nine regional emergency centers, three specialized emergency centers, twenty-two local emergency centers and two local emergency facilities were involved in this study. We surveyed patient cancellation of reception from August 1, 2008, to October 31, 2008 in our hospital. The results of our study were variable but the average of cancellation of reception was 10% of all ED patients. The most common reason for cancellation of reception was the emergency physician sending the patient to an outpatient clinic,typically because they thought the patient had mild symptoms. The most common reasons causing emergency physicians to think about cancellation of reception were mild symptoms and too long a delay time. There was a significant difference of opinion between emergency physician and patient regarding cancellation of reception (p<0.01). The emergency physicians considered the reasons to be patient factors, while the patients considered the reasons to be doctor-related factors. Conclusion: There are many adverse effects from cancellation of reception in an ED for both emergency physicians and patients. We should considered methods for developing a consensus on ways to improve the situation.
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조영신,임훈,조영순,김호중,장혜영 대한응급의학회 2007 大韓應急醫學會誌 Vol.18 No.5
Purpose: To evaluation the Ischemia Modified Albumin (IMA) and Albumin-adjusted IMA (Aa IMA) as an early parameters for acute coronary syndrome. Methods: Retrospective consecutive patients admitted with suspected Acute Coronary Syndrome (ACS) were a assessed with clinical history taking, electrocardiography (EKG), serial cardiac enzyme (creatine kinase, CK-MB, Troponin T), and percutaneous cardiovascular intervention (PCI). IMA and Aa IMA were calculated by receiver operating characteristics (ROC) curve analysis: sensitivity, specificity, negative predictive value, positive predictive value. Results: A total of 396 patients (201 men, 195 women; median age 63.0 years) considered at acute coronary syndrome. The ACS was diagnosed in 114/396 (28.7%). Mean IMA level of ACS group was significantly higher than that of non-ACS group (100±15 U/mL vs 93±13 U/mL, p<0.05). ROC curve area estimated 0.64. If cut off value is 95.5, the sensitivity and specificity is calculated 62%, 62%. The negative predictive value (NPV) and positive predictive value is (PPV) 79% and 40% .The Aa IMA index was calculated 〔IMA index = serum albumin concentration (g/dL)×23+IMA (U/mL)-100〕. ROC curve area estimated 0.65 and the sensitivity and specificity was 74% and 50% at a cutoff value of Aa IMA index 90. The NPV and PPV is 82% and 37%. Conclusion: We concluded that IMA and Aa IMA are relative useful diagnostic tools as rule out ACS in Emergency Department because negative predictive value was high.
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조영신 한국방송공사 2012 방송 문화 연구 Vol.24 No.1
This paper intends to explore the possibility for General programming channels to build up their own economics by comparing economics of Terrestrial TV with economics of Program Providers in Pay-TV industries. Under market dominance of Terrestrial TV on contents markets, this paper argues that general programming channel can not survive without its own echo-system. Because contents market is characterized as high uncertainty, program cost reduction is necessary. However, program cost reduction also leads to low program quality, which can not attract viewers. To balance this kind of situation, general programming channels should be transformed into MPP system. 지상파는 지상파만의 생존 방식이 있고, 케이블 PP는 PP대로의 생존 방식이 있다. 이 글은 지상파의 경제학과 케이블 PP의 경제학을 분석하고, 이를 통해서 종합편성채널이 생존하기 위한 경제학이 무엇인지를 탐색해 보고자 했다. 이를 통해서 후발주자인 종합편성채널사업자가 안정적으로 방송서비스를 계속하기 위해서는 시청률이 높은 프로그램을 제작해서 이를 통해 광고 수익을 확보하겠다는 수익 지향적 모델보다는 자체적인 생태계를 구축하기 이전에는 비용을 줄이는 비용절감형 모델이 훨씬 현실적이라고 제언하고 있다. 또한 콘텐츠 시장의 불확실성을 감안할 때 위험 요인을 경감하기 위해서는 MPP의 전환 혹은 다른 PP들과의 연대가 필요하다고 제언하고 있다.
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