췌장고형유두상피종:방사선학적-병리학적 비교 분석

김지형 대한영상의학회 1996 대한영상의학회지 Vol.34 No.4

Purpose : To report variable radiologic manifestastions and to accomplish detailed radiologic-pathologic correlation of solid and papillary epithelial neoplasm of the pancreas. Materials and Methods : In 23 patients with surgically confirmed solid and papillary epithelial neoplasm, retrospective examinations of operative records, gross and micropathologic findings, and radiologic findings including US(n = 17), CT(n = 23), ERCP(n = 9),MRI(n = 3) were carried out. On the basis of pathologic findings, detailed analysis of radiologic findings of solid and papillary epithelial neoplasm was then performed. Results : Most pancreatic solid and papillary epithelial neoplasms(n = 17) were seen as a mass with heterogeneous internal density consisting of cystic change, hemorrhagic necrosis, and tumor tissue, although the mass can also be seen to be homogeneous(n = 6). On gross specimens, a capsule which showed enhancement on the delayed phase of the enhanced CT scan was demonstrated in 22 cases. It was seen as an echogenic rim on the ultrasound images and as a low signal rim on the MR images. Calcification of the mass was seen in ten cases, nine of which showed peripheral calcification along the tumor capsule ; five cases showed calcifications within the mass. On pathologic examination, ten cases had a single or multiple cystic appearance ; in seven of these cases, this appeared on CT scan. Conclusions : In addition to usual mixed internal density caused by hemorrhagic necrosis of the tumor, enhanced capsule and internal multicystic appearance on CT scan were other characteristics of pancreatic solid and papillary epithelial neoplasm. These could be useful findings in the radiologic approach and in the differential diagnosis of pancreatic masses.

Mo - 화합물의 확산방지막으로서의 성질

김지형,이영준,염근영,송종한 한국진공학회 1996 한국진공학회 학술발표회초록집 Vol.- No.-

어름치(Hemibarbus mylodon)에서 Clinostomum complanatum 감염증

김지형,김경연,오태엽,장환,조성준,데니스 고메즈,카시아노 허모피아,박세창 한국임상수의학회 2008 한국임상수의학회지 Vol.25 No.4

The metacercariae species have often been isolated from fresh water fish in Korea. In this study, we reported Clinostomum complanatum, a species of metacercariae isolated from gill and muscle of Korean barbel (Hemibarbus mylodon), a natural monument fresh water fish in Korea, by morphological observation. The excysted metacercariae, tongue-shaped and progenetic, were 3.11-4.62 mm in length and 0.90-1.43 mm in width. Fresh water fishes are known as the second intermediate hosts of C. complanatum. This is the first isolation report from Korean barbel.

한국 수입와인 시장의 최적 수요예측법에 관한 연구 - 시계열 수요예측 모델을 중심으로 -

김지형,고재윤 한국호텔관광학회 2016 호텔관광연구 Vol.18 No.5

The purpose of this study is to find out the best forecasting model among seven different time-series models and to forecast the size of Korea’s imported wine market in 2021. 66 time-series data per quarter from January 2001 to July 2016 were used in this research from KITA(Korea International Trade Association). The accuracy of models was tested and compared based on value of MAPE. The results show that the Winters Additive Seasonality Model(MAPE=10.13%) is the most appropriate demand forecasting model in terms of the forecasting accuracy. This model predicts the size of imported wine market of Korea in 2021 could be up to USD $246,896,000, CAGR=4.49% which is 30.08% bigger than its size of 2015. Moreover, this study provides two different forecasting scenarios for both conservative(CAGR=2.34%) and optimistic(CAGR=5.46%) points of view and the average of all forecasting results(CAGR=3.98%) of the size of imported wine market in 2021. In this regards, no matter which scenarios are chosen, when marketers make their own medium and long term business plans, it has to be considered that this market is no longer thriving as over the past 5 years(CAGR=9.3%). Because the result of this study mainly implies that the imported wine market in Korea is already entering a mature stage.

Examining the Relationships between French Wine Purchasing Motivation and Satisfaction The Case of Korean Wine Consumers

김지형,구자혁,Robert John Hart 한국외식경영학회 2011 외식경영연구 Vol.14 No.3

The purpose of this paper is to identify the motivations of Korean wine consumers to purchase French wine and to examine the relationships between purchase motivations and post satisfaction. An on-site survey was conducted to Korean wine consumers who had purchased French wine more than once within the previous month. Five hundred twelve questionnaires out of a total of 553 were utilized to examine the relationships between research constructs. Eight underlying dimensions of wine purchasing motivation were delineated using factor analysis. Multiple regression analyses were conducted to examine the relationships between the eight extracted underlying factors from wine purchasing motivation and the three variables from post-purchase satisfaction. The results indicate that quality satisfaction was affected by priority, enjoyment, and mood. Price satisfaction was affected by special relation, health-related, special gift, and mood. In addition, general satisfaction with French wine was affected by enjoyment, health-related, priority, and mood. Practical implications for marketing managers are presented in the conclusion section.

열화상기법과 머신러닝을 활용한 균열 깊이 예측 모델 비교분석

김지형,장아름,박민재,주영규 한국복합신소재구조학회 2021 복합신소재학회논문집 Vol.12 No.4

30세 이하 여성의 유방암 검색에 대한 초음파검사의 유용성

김지형 대한영상의학회 1995 대한영상의학회지 Vol.32 No.4

Purposes: The purpose of this study were to compare mammography and breast sonography in detection of breastcancer and to suggest reasonable guideline of breast imaging in breast cancer patients under 30 years of age inwhom breast cancer shows different clinicopathologic characteristics compared with breast cancer in older women.Materials and Methods: Authors reviewed medical records of 27 patients under 30 years of age withpathologically-proven breast cancer. Age, family history, physical examination findings, indications for breastsonography were reviewed. Cases in whom breast cancer lesion is detectable and cases in whom not detectable usingmammography or breast sonography were reviewed. And then, authors evaluated the usefulness of each method andreasons for nonvisulaization of lesion on mammography. Results: Among 27 patients, 25 patients had palpable breastmass as indication of mammography and breast sonography. Cancer lesions were detectable in 16 of 25 patients (64%)on mammography and 24 of 25 patients (96%) on breast ultrasonography. Reasons for nonvisualization of cancerlesions on mammography were dense breast with nodular parenchyma pattern and minimal breast change of ductalcarcinoma in situ. Conclusion: In breast cancer patients under 30 years of age who have palpable breast mass as ainitial, and main clinical problem, breast ultrasonography is superior to mammography in detecting and diagnosingbreast cancer. We suggest that guidelines can avoid unnecessary mammography in these patients.

유방촬영시 필름-증감지 조합이 영상의 질에 미치는 영향에 관한 실험적 연구

김지형 대한영상의학회 1994 대한영상의학회지 Vol.31 No.2

업계기고 - 화성탐사선의 카메라 렌즈 설계

김지형,Kim, Ji-Hyeong 한국광학기기산업협회 2012 光學世界 Vol.142 No.-

17세기부터 시작된 인류의 화성탐사 역사는 광학 망원경의 발달과 함께 점점 발전하기 시작하면서 21세기에 이르러 마침내 화성에 무인 탐사선을 보내게 된다. 본고는 2012년 8월 성공적으로 화성에 착륙한 화성 탐사로봇 'Curiosity(큐리오시티)'에 탑재된 17개 카메라에 대한 설명과, 2004년 화성 탐사로봇에 탑재되었던 'Opportunity(오퍼튜니티)', 'Spirit(스피릿)'의 카메라 렌즈 설계에 대한 것으로 2006년 SPIE 출판사에서 출간한 'Camera Lenses FromBox Camera to Digital'의 발췌문으로 구성되어 있다. 미항공우주국(NASA)은 이들 카메라의 렌즈 설계를 위해 ZEMAX 광학설계 소프트웨어를 사용했으며, 국내에서도 많은 광학 설계 엔지니어들이 ZEMAX를 사용하고 있다. 멀지 않은 미래에 대한민국의 광학설계 기술이 우주탐사 역사에 한획을 그을 수 있기를 기대해 본다.

함초와 칠면초의 이화학적 특성 조사연구

김지형,송재용,이제만,오세흥,이한정,최혜진,고종명,김용희 한국식품위생안전성학회 2010 한국식품위생안전성학회지 Vol.25 No.2

This study was conducted to investigate for mineral contents, total polyphenol compounds,betaine, choline and DPPH free radical scavenging activity of halophyte. The mineral concentrations of Salicornia herbacea (top part) were Na 100,006 mg/kg, K 1,385 mg/kg, Mg 6,263 mg/kg, Ca 2,750 mg/kg, Fe 90.4 mg/kg, Mn 98.9 mg/kg, Zn 33.3 mg/kg, Cu 3.4 mg/kg respectively. And Suaeda Japonica (top part) were Na 85,332 mg/kg, K 710 mg/kg, Mg 7,005 mg/kg, Ca 4,344 mg/kg, Fe 1,434.9 mg/kg, Mn 119.1 mg/kg, Zn 19.2 mg/kg, Cu 2.7 mg/kg respectively. The betaine contents of Salicornia herbacea (top part) were 15.09 mg/g and Suaeda Japonica (top part)were 14.64 mg/g. The choline contents estimated by the DBAP-choline derivatives of Salicornia herbacea (top part)were 20.9 mg/100 g, Salicornia herbacea (root) were 23.4 mg/100 g, Suaeda Japonica (top part) were 23.1 mg/100g and Suaeda Japonica (root) were 23.8 mg/100 g. Total polyphenol compounds of Salicornia herbacea (top part) were high 36.0 mg/g in growth phase. The DPPH radical scavenging activities of methanol extract Salicornia herbacea (top part) were high 90.1% in growth phase. The frozen dried powder of Salicornia herbacea (top part) 1 g was equal to Quercetin 30.26 mg, Rutin 42.65 mg, TBHQ 20.32 mg, BHA 25.86 mg, BHT 40.75 mg, Ascorbic acid 22.86 mg in DPPH radical scavenging activities.