정성일과의 인터뷰

정성일,박성수 문화과학사 2000 문화과학 Vol.- No.21

평판형 검출기를 이용한 디지털 방사선 촬영의 방사선량 감소에 따른 화질에 대한 영향: 가토를 이용한 실험적 연구

정성일,구진모,이현주,문우경,임근영,조경구,김지훈,최장용,남상희,임정기 대한영상의학회 2005 대한영상의학회지 Vol.53 No.1

Purpose: To evaluate the effect of dose reduction on image quality in digital radiography using a flat-panel detector. Materials and Methods: Digital radiographs of 30 rabbits were obtained at two different dose levels (33.23 μGy for the standard dose group and 20.09 μGy for the reduced dose group). The amorphous selenium-based flatpanel detector system had a panel size of 7×8.5 inches, a matrix of 1280×1536 (pixels?), and a pixel pitch of 138 μm. Four observers evaluated the soft-copy images on a high-resolution video monitor (2560×2048×8 bits) in random order. The observers rated the visibility of 13 different anatomic structures on a 5-point scale, viz. the retrocardiac lung, subdiaphragmatic lung, heart border, diaphragmatic border, proximal airway, unobscured lung, liver border, kidney border, bowel gas, flank stripe, ribs, and vertebrae in the mediastinal and abdominal regions. Statistical significance was determined using Wilcoxon’s signed rank test. Results: There was no statistically significant difference in the visibility of the anatomic structures on digital radiography between the standard and reduced dose groups. Conclusion: Digital radiography using an amorphous selenium-based flat-panel detector can preserve the image quality, even though the does is reduced to 40% of the standard level. 목적: 평판형 검출기를 이용한 디지털 방사선 촬영에서 방사선량 감소의 화질에 대한 평가를 하고자 한다. 대상과 방법: 가토 30마리를 대상으로 표준군은 33.23 μGy, 감소군은 20.09 μGy으로2가지의 다른 방사선량으로 디지털 방사선촬영을 시행하였다. 사용된 평판형 비정질 셀레늄 검출기는 7×8.5 inch 크기와 1280×1536의 matrix, 138 μm의 pixel pitch로 구성되었다. 획득된 2군의 영상을 고해상도 모니터에서 4명의 판독자가 심장후 폐야, 횡격막후 폐야, 심장 윤곽, 횡격막 윤곽, 근위부 기도, 가리지 않은 폐야 등의 흉부 구조물, 간 윤곽, 좌우측 신장 윤곽, 장내 가스, 외측 복벽 지방선 등의 복부 구조물, 늑골, 종격동뒤 척추, 복강부위 척추 등의 골 구조물 등 총 13가지의 해부학적 구조물에 대하여 5가지 척도로 평가하였고 결과에 대하여 Wilcoxon’s signed ranks test를 이용하여 통계적 처리를 하였다. 결과: 표준군과 감소군간에 13 가지 해부학적 구조물에 대하여 영상의 질적 평가상 통계적으로 유의한 차이는 없었다. 결론: 평판형 비정질 셀레늄 검출기를 사용한 디지털 방사선촬영술은 기존의 방사선량에서 40%의 감소를 하여도 영상의 질을 유지할 수 있었다.

All-in-One, Low Cost, User-Friendly 기반의 종합 CAE SW : Femtet 소개

정성일 한국정보통신설비학회 2022 한국정보통신설비학회 학술대회 Vol.2022 No.11

주파수영역 에너지와 SFM을 이용한 잡음 환경에서의 음성구간 추출에 대한 연구

정성일,유광주,신옥근 한국해양대학교 산업기술연구소 2001 연구논문집 Vol.18 No.-

본 논문에서는 잡음이 섞인 음성신호에서 음성 추간을 찾는 새로운 방법을 제안한다. 잡음에 강인한 검출성능을 위해 주파수 스펙트럼의 각 성분이 얼마나 평활한지를 나타낼 수 있는 SFM(Spectral Flatness Measure)과 주파수 영역에서의 에너지 평균을 이용한다 제안한 음성구간 검출방법은 특정한 환경에만 한정되는 것이 아니라, 다양한 잡음환경에서도 우수한 검출성능을 갖는 것으로 확인되었다.

Validation of the Korean-Version of the Clinical Assessment Interview for Negative Symptoms of Schizophrenia (CAINS)

정성일,우정민,김양태,곽상규 대한의학회 2016 Journal of Korean medical science Vol.31 No.7

The Clinical Assessment Interview for Negative Symptoms (CAINS) was developed to overcome the limitations of existing instruments and reflect the current view of negative symptoms. The aim of the present study was to evaluate the reliability and validity of the Korean version of the Clinical Assessment Interview for Negative Symptoms (K-CAINS). Inpatients (n = 49) and outpatients (n = 70) with schizophrenia were recruited from three institutions. The confirmative factor analysis, test-retest reliability, inter-rater reliability, convergent validity, and discriminant validity were assessed. The study group consisted of 71 males (59.7%) and 48 females (40.3%). Their mean age was 42.15 years (SD = 12.2). The K-CAINS was confirmed to be divided into two subscales of 9 items related to “motivation/pleasure” and 4 items related to “expression” in concordance with the original version of the CAINS. The results showed that the K-CAINS had a good inter-rater reliability (ICC = 0.84-0.94), test-retest reliability (r = 0.90, P < 0.001). Convergent validity was proven by demonstrating a significant correlation with the Positive and Negative Syndrome Scale (PANSS) negative subscale, and the Scale for the Assessment of Negative Symptoms (SANS). Discriminant validity was proven by the lack of a significant correlation with the PANSS positive subscale, the Korean version of the Beck depression inventory (BDI), the Korean version of the Calgary depression scale for schizophrenia (K-CDSS), and the Modified Simpson Angus scale (MSAS). The K-CAINS could be a reliable and valid tool to assess the negative symptoms of Korean schizophrenia patients.

國書와 書契로 본 朝鮮後期(1600-1870) 對日外交

정성일 명청사학회 2019 명청사연구 Vol.0 No.52

This article analyzes foreign relations documents exchanged between Joseon and Japan. As foreign relations documents, there were the kukso (J. kokusho) and the sogye (J. shokei). State letters were exchanged between the King of Joseon and the Shogun of Japan's Bakufu. The kukso was the most powerful document of the King of Joseon and of the Shogun of Japan that were exchanged between the two rulers. The sogye was the next lowest step for foreign relations. Here, Joseon-Japan relations were examined from three perspectives. First, what kinds of seals were placed on foreign relations documents? Second, how were years and time expressed on foreign relations documents? Third, how was the name of Japan's shogun expressed? As results of the analysis above, Joseon and Japan together entered into foreign relations of “equal relations.” Between Joseon and Japan, as a result of already having established interaction, cooperation and confirmation were established. Both countries believed their country to be superior. Further, both countries set the other country as below their own. But, at the scene of diplomacy between the two countries, the so-called Hwa-i (J. Kai-i) view of the other ruler was difficult to express through written documents.

윤유숙 지음, <<근세 일조통교와 왜관 (近世日朝通交と倭館) >> : (일본 岩田書院, 2011.2.)

鄭成一 일본사학회 2012 일본역사연구 Vol.35 No.-

난소 종괴의 초음파 진단

정성일 대한초음파의학회 2013 ULTRASONOGRAPHY Vol.32 No.1

As a primary imaging modality for evaluation of an ovarian mass, ultrasound (US)can provide us with various diagnostic information. Using a pattern recognition approach through gray-scale transvaginal US, diagnosis of an ovarian mass can be made with high specificity and sensitivity and Doppler US may increase the confidence with which a correct diagnosis of benignity or malignancy is made. Although a hemorrhagic corpus luteal cyst, endometrioma, or mature teratoma can be readily characterized on the basis of typical sonographic findings, specific diagnosis of other ovarian masses is difficult based on US alone. In such cases, categorization as a unilocular, unilocular solid, multilocular, multilocular solid, or solid mass and assessment of the solid component in the mass is important for discrimination between benign and malignant masses. 초음파 검사는 난소 종괴의 일차적인 검사로서 다양한 진단적 정보를 제공한다. 특히 회색조 경질 초음파를 통한 형태 인지적 평가는 악성 난소 종양의 진단에 있어서 높은 민감도와특이도를 보이며 도플러 검사를 추가함으로써 진단적 신뢰도를 증가시킨다. 본 종설은 회색조 초음파 소견을 바탕으로 난소 종괴를 단방성 낭종, 단방성 고형 낭종, 다방성 낭종, 다방성고형 낭종, 고형성 종괴로 범주화하여 각 범주에 포함된 다양한 난소 질환의 대표적인 초음파 소견을 제시함과 동시에 악성난소 종괴의 특징적인 초음파 소견을 소개하고자 한다.

도시형 한옥의 주거공간 변화에 관한 연구 : 전주시 풍남동을 중심으로 the case of pungnam-dong Jeonju city

정성일,진정 대한건축학회 2000 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.20 No.2

This Study is focused on the transition of residential space. The Urban Traditional Housing is a housing type that had been built from 1920's to 1950's in the Jeonju City. It was supplied by private housing developers organized with traditional craftsmen and its form was based on the traditional housing. The cause of transition in residential space are the growth of fancily, rental income, and change of living style. The Urban Traditional Housing in Pungnam-dong shows a trend of subdivision, accumulation by an administrative restriction and socio-cultural changing

조선시대 한일 교류의 경로와 풍경 : 일본 고토렛토(五島列島)를 중심으로

정성일 역사문화학회 2010 역사문화학회 학술대회 발표자료집 Vol.2010 No.11월