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이일기 대한영상의학회 1986 대한영상의학회지 Vol.22 No.2
24 cases of surgically proven ovarian teratomas were analized. 1. The most prevalent age group was 3 rd decades(57%). 2. The size of moste tumors falls into 5-15 cm (96%). 3. The site of involvement was more common on left side than right. 4 . Well developed teeth or bones were identified in 9 patients on simple abdominal films (39%). 5. Ultrasonographic findings of the tumors were purely cystic in 3 cases (12.5%), mixed in 15 cases (62.5%) and solid in cases(25%). 6. Among mixed typed masses predominant cystic tumors were 11 cases, and the remained (4 cases) were predominantly solid type. 7. Vaious ultrasonic findings were seen such as hair-fluid level, linear echoes, scattered echoes, nodular intermixed dense echoes, papillary echogenic mass, and calcifications. 8. Echogenic nodular foci on nondependant port8ion were considered to be a helpful diagnostic sign of ovarian.
반대측 난소의 성숙형 낭성기형종과 동반된 악성 난소갑상선종의 자기공명영상 소견: 증례 보고
이일기,Lee, Il-Gi 대한영상의학회 2003 대한영상의학회지 Vol.49 No.4
난소 갑상선종은 빈도가 낮은 난소 종양으로 방사선학적 검사에서 비특이적인 복합성 종괴로 관찰되어 수술 전 진단이 어렵다. 양성 난소 갑상선종의 자기공명영상 소견에 대한 보고는 있었으나, 악성 난소 갑상선종의 자기공명영상 소견에 대한 보고는 없었다. 이 증례에서 난소 갑상선종은 자기공명영상에서 주변의 낭성 부분과 조영증강이 잘 되는 고형부분을 포함한 복합성 종괴로 관찰되었고, 반대측 난소에는 성숙형 낭성 기형종이 발견되었다. 이에 저자들은 반대쪽 난소에 성숙형 낭성 기형종을 동반한 악성 난소 갑상선종 1예를 보고하는 바이다. Malignant struma ovarii is a rare form of ovarian carcinoma. Since it is often seen as a nonspecific complex mass, its preoperative diagnosis is difficult. The MR imaging findings of benign struma ovarii have been reported, but no published account has described the malignant form. In this case, MR images depicted multiple cysts with well enhanced solid portions in the left ovary, and the typical apperarance of mature cystic teratoma in the right ovary. We describe a case of malignant struma ovarii associated with mature cystic teratoma of the contralateral ovary.
CT Image Processing방법에 의한 주문형 인공고관절 설계
이일기 嶺南大學校 工業技術硏究所 1994 工業技術硏究所論文集 Vol.22 No.2
Many surgeons agree that fit and fill of the endosteal canal is critical to the sucess of cementless total hip prosthesis. However, there exists wide variation to the anatomic size and shape of this canal in the normal population. This paper reviewed the possible fit and fill of three mass-produced total hip prostheses to a patient using computer graphics and CT image technique. For this purpose, a program has been developed that allows the designer(or surgeon) to match a prosthesis to any endosteal canal. The results showed that the mass-produced total hip prostheses could not be fitted to a specific patient. It is assumed that the custom total hip prosthesis should be superior to the current use of total hip prosthesis. This is the reason why the fundamental idea of custom total hip prosthesis design is proposed in this paper.
가상자산을 이용한 실생활 결제방법 문제 해결을 위한 시스템 연구
김 정묵,최 일기,성 종엽 조선대학교 IT연구소 2021 정보기술융합공학논문지 Vol.11 No.2
가상자산이 시장에 엄청난 주목을 받기 시작하면서 비트코인 이후 수천 가지의 가상자산이 생겨났으며, 기업들과 금융업체들은 블록체인이라는 단어로 홍보하며 엄청난 성장을 이루었다. 비트코인을 활용한 결제는 이미 테슬라를 통해적용된 사례가 있으며, 이더리움 또한 가상자산 결제 수단으로써 활용되고 있다. 하지만 트랜잭션 속도 및 수수료, 가격불안정성 때문에 상용화되기 쉽지 않은 상황이다. 해당 연구를 통해 가상자산을 활용한 결제방법의 문제점을 해결하고일반 간편결제와 마찬가지로 활용될 수 있는 시스템에 대해 다음과 같이 연구하고 제안하고자 한다. As Cryptocurrency began to attract tremendous attention in the market, thousands of Cryptocurrency emerged after Bitcoin. Companies and financial companies have achieved tremendous growth by promoting the word blockchain. Payment using Bitcoin has already been applied through Tesla, and Ethereum is also used as a Cryptocurrency payment method. However, it is not easy to commercialize due to transaction speed, fees, and price instability. This study is to solve the problems of payment methods using Cryptocurrency and propose the following systems that can be used as a general simple payment.
Effects of V/III flux ratio on Curie temperature of GaMnAs
동완 고,용주 박,관수 정,광무 김,영미 김,일기 한,일우 박,정일 이,진범 박 한국물리학회 2004 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.45 No.2
We investigated the eects of V/III ux ratios on the Curie temperature, TC, in Ga1xMnxAs layers with Mn mole fractions of x = 0.03 and 0.05. Changes in the TC are observed by varying V/III ratio with a xed Mn mole fraction. The TC in the sample grown with a lower V/III ratio (25) is found to be higher than that in the sample grown with a higher V/III ux ratio (34) at a xed high Mn concentration (x = 0.05). Although the Mn concentration is increased, the TC is not much changed when the V/III ratio is high (34). These results can be explained by the existence of low-temperature growth defects, which are considered to have the main eects on the electrical and the magnetic properties of the GaMnAs layers. We elucidated the relevant defects by employing thermal annealing processes and by obtaining photoluminescence spectra.
金日基 全北大學校 師範大學 1982 사대논문집 Vol.8 No.-
This article seeks to analysis major problems of middle and high school geography education in Korea. Report suggest how those problems are improvement under Korean educational situation. This article is to report concerning seven problems of geography education such as teaching-learning method harmony of geography and geography education, curriculum, field-works, teaching, method of value education through geography curriculum. 1. We can find that most of geography education still employing teacher-led expository method. We must improve Inquiry-method and education simulation. 2. New contents and law of geography must be immediately taught in geography education. 3. The study of middle and high school geography curriculum must be carried out by professor and high school teacher in cooperation. 4. One of the important method of geography education is field-works, so we need improvement of field-works method in geography curriculum. 5. We must make program for teacher training in college of education. The program must be involved in social studies curriculum (world history, civics). 6. For the the achievement of the aims of value education in geography curriculum, we need to improve the method and contents of geography education.