Subtraction法을 利用한 顎關節 X-線寫眞 判讀에 關한 硏究

羅椿和,劉東洙 大韓口腔顎顔面 放射線學會 1987 Imaging Science in Dentistry Vol.17 No.1

The purpose of this study is to know the value of the photographic subtraction technic in the transcranial oblique lateral projection of the TMJ. The author examined the transcranial oblique lateral projection radiographs which comprise 50 cases of 32 persons, compared the transcranial oblique lateral projection films and those subtraction films. The following results were obtained. 1) The condyle at closed jaw position had showed a reversed tone image, but the condyle at the opening position had showed a re-reversed ordinary image. Both condyles had showed one subtraction film because radiographic interpretation of TMJ was easy. 2) On 50 cases of subtraction films, 46 cases had showed same radiographic images compared with trascranial oblique lateral projection films. Four cases (3 cases of erosion, 1 cases of sclerosis) had showed additional changes of images so that capability of interpretation was improved.

AHP-Based Determination of Warning Grade in a Warranty Claims

나춘수(Na, Choon-Soo),정병수(Jung, Byeong-Soo) 한국산학기술학회 2010 한국산학기술학회논문지 Vol.11 No.12

보증 시스템의 '학습'모듈과 '우선순위' 등을 포함된 두 가지 기능을 이용하여 의사결정시스템을 개발을 할 수 있다. 본 논문은 품질보증 시스템과 신경망 학습기능을 이용한 위험분석 방법을 보여준다. 분석 방법은 신경 네트 워크뿐만 아니라, 계층 분석방법을 사용하여 경고 기준에 우선순위를 할당을 위해 적용되었다. 따라서 보증 시스템, AHP 모듈 및 신경 네트워크 시스템의 세 가지 구성 요소와 함께 통합 시스템 구축을 가능하게 한다. 사례 연구에 제공되는 자동차 회사에서 사용되는 보증 시스템 내에 많은 요인을 이용해 정확한 판단의 "경고 / 검출" 을 향상시키고자 한다. Two perspectives on developing better decision capabilities for a warranty system can be identified: one involving the inclusion of a ‘learning’ module and the other the inclusion of a ‘prioritization’ capability. This paper demonstrates how a warning process can be included in a warranty system by coupling with a neural network’s learning capabilities. In addition to the neural network, a method is employed for assigning priorities to warning criteria by using the analytic hierarchy process (AHP). Thus, it is possible to construct an integrated system with three components: the warranty system, the AHP module, and the neural network system. A case study is provided to enhance the accuracy of warning/detection judgment in a warranty system for automobile companies, having many factors related to the warranty system.

Study on Production of Poly (γ-glutamic acid) by Bacillus subtilis CH-10

Na-Yeon Gu,Choon-Hee Kim,Dong-Eun Kim,Soo-Wan Nam,Sung-Jong Jeon 한국생명과학회 2005 한국생명과학회 심포지움 Vol.45 No.-

Behavior Model of IT Governance Concerns

Byeong Soo Jung,Choon Soo Na,Byeong Ho Jeong The Research and Information Service 2010 남부대학교 논문집 Vol.10 No.-

IT governance implies a system in which all stakeholders, including the board, internal customers and related areas such as finance, have the necessary input into the decision making process. But, the concepts of IT governance are broad and ambiguous which in turn implicate difficult and inaccurate assessments. In particular, the traditional handling of IT management by board-level executives is that due to limited technical experience and IT complexity, key decisions are deferred to IT professionals. IT governance is eventually a matter of multi-criteria decision making. This article presents a hierarchical structure to understand the relationship between control structure and the complexity of collective behavior with respect to IT governance, and a corresponding fuzzy model for assessing IT governance complexity based on an extensive literature study. These can be used for a good understanding how the concerns of IT governance behave, how they interact and form the behavior of the whole system. IT governance is the preparation for, making of and implementation of IT-related decisions regarding goals, processes, people and technology on a tactical or strategic level. The model ofr assessing IT governance is employed to compare how IT governance is defined in practitioners and Cobit.

Epidermoid cyst: A single-center review of 432 cases

Kim, Choon Soo,Na, Young Cheon,Yun, Chi Sun,Huh, Woo Hoe,Lim, Bo Ra Korean Cleft Palate-Craniofacial Association 2020 Archives of Craniofacial Surgery Vol.21 No.3

Background: Epidermoid cysts are benign tumors derived from the infundibular portion of hair follicles and thus have a flattened surface epithelium and keratohyaline granules. They can occur at any age but are most frequently reported in adults, and more often occur in men than women. Most epidermoid cyst operations are performed for cosmetic purposes, or to relieve inflammation. The definitive treatment is complete excision or destruction of the cyst. The aim of this study was to improve understanding of epidermoid cysts. Methods: We analyzed 432 cases of epidermoid cyst in 398 patients that underwent complete excision and biopsy between April 2001 and March 2020, according to patient age, patient gender, and lesion location. Results: From all epidermoid cyst excisions performed, 17.6% were for patients in their 40s and 50s, 16.8% for those in their 20s, 16.1% for those in their 30s, 14.6% for those aged 60 or older, 5.0% for teenagers, and 0.5% for those under 10 years. Cases of epidermoid cysts occurred at a men-to-women ratio of about 3:2, with 59.5% of cases in men and 40.5% in women. By lesion location, 65.0% of cases were on the face, 10.9% on the trunk, 7.9% on the scalp, 7.9% on the neck, 4.3% on lower extremities, 3.9% on upper extremities, and 0.2% on genitalia. On the face, 20.8% of cases were on the cheek, 12.7% on the periauricular area, 10.9% on the periorbital area, 6.0% on the frontal area, 5.6% on the mental area, 3.7% on the perioral area, 2.8% on the nasal area, and 2.5% on the temporal area. Conclusion: The proportion of women with epidermoid cysts was higher in our study than in previous studies. Moreover, the results showed that surgery has been on the rise in recent years, with facial surgery being the most common.

개별환경제어(PEM)시스템의 운용에 따른 건물의 에너지절약성에 관한 연구

송인춘,구현덕,김기세,나기태,김병수 忠南大學校 産業技術硏究所 1999 산업기술연구논문집 Vol.14 No.1

The building energy conservation possibility by introducing personal environment module(PEM)system was analyzed by DOE-2.1E building energy analysis program on the 6 stories office building. The results showed energy consumption of the building with PEM system could be increased more than the conventional VAV system when the occupant was not decreased. But the energy consumption rate in the building with PEM could be equal to VAV system when approximately 20% of the occupant is decreased. As a result, basically PEM system can consume more about 9.2%energy than the VAV system, but it can also have the possibility to save energy about 11.4% if it is operating with energy conservative way.

MR Imaging Findings of Tamoxifen-associated Uterine Adenosarcoma: Report of Two Cases

Choi, Soo Yeon,Sung, Deuk Jae,Han, Na Yeon,Park, Beom Jin,Kim, Min Ju,Sim, Ki Choon,Cho, Sung Bum Korean Society of Magnetic Resonance in Medicine 2015 Investigative Magnetic Resonance Imaging Vol.19 No.1

Adenosarcoma of the uterus is a rare biphasic tumor containing benign glandular epithelial and malignant mesenchymal components. The tumor has been reported to be associated with antiestrogen therapy, particularly tamoxifen, but there have been a few case reports with MRI. We present two cases of MRI findings of uterine adenosarcoma after antiestrogen therapy, tamoxifen and toremifene in breast cancer patients. The tumor presents as a large polypoid mass occupying the endometrial cavity, and may protrude into the vagina. On MRI, the tumor typically shows solid components with scattered small cysts and heterogeneous enhancement. These findings are not significantly different from conventional adenosarcoma.

간경변 환자에서 위배출시간에 영향을 주는 요인

박수헌,김진일,정인식,김재광,정규원,한준열,선희식,손형선,방춘상,나종순 대한소화기학회 1998 대한소화기학회지 Vol.32 No.1

Background/Airns: Although patients with cirrhosis often complain the gastrointestinal symptoms such as indigestion, little attention has been paid to the possible effects of portal hypertension on gut function. Frequently, endoscopic feature of patients with cirrhosis included congestive gastropathy. However, it has not been shown that whether gastric emptying time is delayed in cirrhotic patients with congestive gastropathy. The aims of this study were to evaluate the gastric emptying in cirrhotic patients with congestive gastropathy and to understand the factors causing the delay of gastric emptying time in patients with cirrhosis. Methods: Between April 1996 and September 1996, 30 cirrhotic patients with congestive gastropathy, 27 cirrhotic patients without congestive gastropathy, and 15 controls were participated in this study at St, Mary Hospital. All patients were subjected to evaluation of gastrointestinal symptom score, endoscopy, Child-Pugh score, and gastric emptying time with solid meal. Results: The gastric emptying time was longer in cirrhotic patients with congestive gastropathy than in controls (105.6±9.58 vs 72.4±6.02 minutes), but there was no significant difference between cirrhotic patierits without congestive gastropathy and controls (93.7±7.93 vs 72.4±6.02 minutes). Among Factors influencing gastric emptying time in cirrhosis such as congestive gastropathy, ascites, gastric varix, AST, ALT, Child-Pugh score, prothrombin time, age, albumin level, esophageal varix, and bilirubin, only the congestive gastropathy was statistically significant (p$lt;0.05). Conclusions: The gastric emptying time was delayed in cirrhotic patients who had congestive gastropathy. Thus, congestive gastropathy may contribute to the pathogenesis of delayed gastric emptying in cirrhosis.

0.34 <tex> $\text{V}_{\mathrm {T}}$</tex> AlGaN/GaN-on-Si Large Schottky Barrier Diode With Recessed Dual Anode Metal

Hyun-Soo Lee,Dong Yun Jung,Youngrak Park,Jeho Na,Hyun-Gyu Jang,Hyoung-Seok Lee,Chi-Hoon Jun,Junbo Park,Sang-Ouk Ryu,Sang Choon Ko,Eun Soo Nam IEEE 2015 IEEE electron device letters Vol.36 No.11

<P>A large GaN-Schottky barrier diode (SBD) with a recessed dual anode metal is proposed to achieve improved the forward characteristics without a degradation of the reverse performances. Using optimized dry etch condition for a large device, the electrical characteristics of the device are demonstrated when applying the recessed dual anode metal and changing the recess depths. The device size and channel width are 4 mm(2) and 63 mm, respectively. The 16-nm recessed dual anode metal SBD has a turn-ON voltage of 0.34 V, a breakdown voltage of 802 V, and a reverse leakage current of 1.82 mu A/mm at -15 V. The packaged SBD exhibits a forward current of 6.2 A at 2 V and a reverse recovery charge of 11.54 nC.</P>

The Survival Rate of Korean Patients with COPD with or without Acute Exacerbations

Uh, Soo-Taek,Lee, Ji-Yeon,Koo, So-Mi,Kim, Yang-Ki,Kim, Ki-Up,Park, Jong-Sook,Park, Sung-Woo,Jang, An-Soo,Kim, Do-Jin,Choi, Jae-Sung,Na, Joo-Ok,Suh, Ki-Hyun,Kim, Yong-Hoon,Park, Choon-Sik The Korean Academy of Tuberculosis and Respiratory 2011 Tuberculosis and Respiratory Diseases Vol.70 No.6

Background: Chronic obstructive pulmonary disease (COPD) is characterized by air low limitation, which is one of the leading causes of mortality worldwide. There have been many studies on survival rates in the world literature, but there have been few reports regarding the survival rate in Korean patients with COPD. Acute exacerbation is regarded as a risk factor for mortality in patients with COPD. The purpose of this study was to investigate the survival rate and the effect of acute exacerbations on the survival rate of Korean patients with COPD. Methods: A total of 502 COPD patients who were diagnosed on the basis of history and lung function tests were enrolled in this study. The frequency of acute exacerbations, body mass index (BMI), C-reactive protein (CRP) and pulmonary hypertension were analyzed. Results: The 3- and 5-year survival rates were 98% and 83%, respectively. The median survival time was 78 months. The median survival time was 55 months in 322 patients with one or more acute exacerbations. The 3- and 5-year survival rates were significantly lower in the 322 patients with one or more acute exacerbations than in those without any. The mortality rate was significantly higher in patients with CRP>3 mg/L than in those with CRP ${\leq}3$ mg/L (p<0.005); it was significantly higher in patients with pulmonary hypertension than in those without it (p<0.01). Conclusion: Because the 5-year survival rate is 83% in Korean patients with COPD, the management of stable patients with COPD should focus on the prevention of acute exacerbations.