Mn 첨가량 변화에 따른 Tb/Mn이 첨가된 화학양론조성 LiNbO3 단결정의 광학적 특성

이성문,윤대호,신동익,김근영,백승욱 한국세라믹학회 2004 한국세라믹학회지 Vol.41 No.1

Micro-pulling down (μ-PD) 법을 이용하여 MnO2와 Tb4O7를 첨가하여 crack, 열 strain등의 결함이 없는 화학양론조성의 LiNbO3 단결정을 c-축으로 직경 1.0 mm, 길이 25~30 mm의 크기로 성장시켰다. electron probe micro analysis (EPMA)를 이용하여 결정 내에 MnO2와 Tb4O7이 균일하게 분포되어 있음을 확인하였다. 또한 fourier transform infrared spectrophotometer (FT-IR)을 사용하여 OH- 흡수밴드를 관찰하였고, 성장된 결정의 MnO2와 Tb4O7첨가에 따른 형광특성의 변화를 측정하였다. Using the Micro-pulling down method (μ-PD), MnO2 and Tb4O7 co-doped crack-free stoichiometric LiNbO3 single crystals were grown in 1.0 mm diameter and 25~30 mm length for c-axis. The homogeneous distributions of MnO2 and Tb4O7 concentration were confirmed by the electron probe microanalysis (EPMA). Also, the infrared OH- absorption band of the single crystals observed by using a fourier transform-infrared spectrophotometer (FT-IR) at room temperature and the photoluminescence spectra was measured with respect to the MnO2 and Tb4O7 doping.

척추체내 진공열의 자기공명영상 : 2예 보고

이성문 대한영상의학회 1994 대한영상의학회지 Vol.31 No.1

Mn 첨가량 변화에 따른 Tb/Mn이 첨가된 화학양론조성 LiNbO₃ 단결정의 광학적 특성

이성문,신동익,김근영,백승욱,윤대호,Lee, Sung-Mun,Shin, Tong-Ik,Kim, Geun-Young,Back, Seung-Wook,Yoon, Dae-Ho 한국세라믹학회 2004 한국세라믹학회지 Vol.41 No.1

Micro-Pulling Down (${\mu}$-PD) 법을 이용하여 $MnO_2$와 $Tb_4O_7$를 첨가하여 crack. 열 strain 등의 결함이 없는 화학양론조성의 $LiNbO_3$ 단결정을 c-축으로 직경 1.0mm, 길이 25-30mm의 크기로 성장시켰다. Electron Probe Micro Analysis (EPMA)를 이용하여 결정 내에 $MnO_2$와 $Tb_4O_7$이 균일하게 분포되어 있음을 확인하였다. 또한 Fourier Transform-Infrared Spectrophotometer (FT-IR)을 사용하여 OH 흡수밴드를 관찰하였고, 성장된 결정의 $MnO_2$와 $Tb_4O_7$ 첨가에 따른 형광특성의 변화를 측정하였다. Using the Micro-Pulling Down (${\mu}$-PD), $MnO_2$ and $Tb_4O_7$ co-doped crack-free stoichiometric $LiNbO_3$ single crystals were grown in 1.0 mm diameter and 25-30 mm length for c-axis. The homogeneous distributions of $MnO_2$ and $Tb_4O_7$ concentration were confirmed by the Electron Probe Microanalysis (EPMA). Also, the infrared OH absorption band of the single crystals observed by using a Fourier Transform-Infrared Spectrophotometer (FT-IR) at room temperature and the photoluminescence spectra was measured with respect to the $MnO_2$ and $Tb_4O_7$ doping.

근골격계 역동적 초음파 검사 - 하지 및 기타 질환

이성문,노병학 대한초음파의학회 2009 ULTRASONOGRAPHY Vol.28 No.2

Performing dynamic ultrasonography in the lower extremity is not so popular as performing dynamic ultrasonography in the upper extremity. However, performing this modality is essential for some diseases and it is very helpful for various other disorders too. The purpose of this article is to describe the basic technique and disorders that dynamic ultrasonography is helpful for or essential for making a diagnosis in the lower extremity and for diagnosing other miscellaneous diseases as well. We also include a review of the relevant medical literature. 하지에서 역동적 초음파검사는 상지에 비해 일상적으로 많 이 이용되진 않지만 상지와 마찬가지로 몇몇 질환에서는 진단 에 필수적인 검사이며 다양한 질환에서 이용될 수 있다. 이 종 설에서는 하지와 기타 질환에서 진단에 필수적이거나 도움을 줄 수 있는 역동적 검사의 기본적인 검사방법과 증례들을 문헌 고찰과 함께 기술하고자 한다.

후복막강 종괴의 전산화단층촬영소견

이성문 대한영상의학회 1987 대한영상의학회지 Vol.23 No.5

Retrospective analysis of forty one retroperitoneal masses was made with computed tomography. All cases wereconfirmed pathologically by operation or needle aspiration biopsy. The cases were; 14 abscesses, 2 leiomyosarcomas, 2 rhabdomyosarcomas, 2 liposarcomas, 1 undifferentiated sarcoma, 3 endodernal sinus tumors, 4 teratomas, 2 neurofibromas, 1 neurilemoma, 3 neuroblastomas, 4 milignant lymphomas, 2 malignant fibrous histiocytomas and 1 hemangiopericytoma. Tumors originated fromurinary tract and pancreas were not included. Findings favor tumor rather than inflammation were; large lobulated soft tissue mass wit eccentric or heterogeneous low density, thick cavity wall, disruption of fascial planes, regional lymphnode enlargement and distant metastasis.

신세포암에 대한 경피경동맥 색전술에 관한 고찰

이성문 대한영상의학회 1987 대한영상의학회지 Vol.23 No.6

During 2-year period at the Kosin medical center, we performed trasarterial emboliztion in 11 patients with renal cell carcinoma, six preperatively and five palliatively. The occlusive material used were lvalon, absolute alcohol, and gelfoam. Nephrectomy follwed three to twelve days after TAE. Preoperative TAE of a renal cell carcinoma was helpful to the urologist especially with large, hypervascular tumors. The mean time of surgery was decreased. Mean blood loss during nephrectomy was 2.6 pints. Surgical dissecton was facilitated after TAE and was 2.6 pints. Surgical dissection was facilitated after TAE and the urologist favored alcohol as a thromboembolic agent. Symptoms and sings of patients treated palliatively were general weakness, severe pain, anemia and hematuria. 2 patients had pulmonary and bony metastases and 2 patients had tumor extension to IVC. The hematuria ceased immediately after embolizaton and general condition improved significantly. Post infarction syndrom was mild in all cases and no major complications attributable to the embolic materials were present. Transarterial embolization changed the course of the disease and offers promise in the management of patients with renal cell carcinoma.

근전도 기반의 Spider Chart와 딥러닝을 활용한 일상생활 잡기 손동작 분류

이성문,피승훈,한승호,조용운,오도창,Lee, Seong Mun,Pi, Sheung Hoon,Han, Seung Ho,Jo, Yong Un,Oh, Do Chang 대한의용생체공학회 2022 의공학회지 Vol.43 No.5

In this paper, we propose a pre-processing method that converts to Spider Chart image data for classification of gripping movement using EMG (electromyography) sensors and Convolution Neural Networks (CNN) deep learning. First, raw data for six hand gestures are extracted from five test subjects using an 8-channel armband and converted into Spider Chart data of octagonal shapes, which are divided into several sliding windows and are learned. In classifying six hand gestures, the classification performance is compared with the proposed pre-processing method and the existing methods. Deep learning was performed on the dataset by dividing 70% of the total into training, 15% as testing, and 15% as validation. For system performance evaluation, five cross-validations were applied by dividing 80% of the entire dataset by training and 20% by testing. The proposed method generates 97% and 94.54% in cross-validation and general tests, respectively, using the Spider Chart preprocessing, which was better results than the conventional methods.

정부출연 연구소 대국민 인식과 변화 방향

이성문,백창화,임성욱 한국서비스경영학회 2021 한국서비스경영학회 학술대회 Vol.2021 No.5

Czochralski법으로 Er2o3이 첨가된 Near Stoichiometric 조성 LiNbO3 단결정의 성장 및 특성 변화

이성문,신동익,김근영,Masayuki Habu,Takeshi Ito,Masakimi Natori,윤대호 한국세라믹학회 2003 한국세라믹학회지 Vol.40 No.8

Using the Czochralski method, Er2O3 doped near stoichiometric LiNbO3 single crystals were grown 15~20 mm in diameter and 30~35 mm in length for Z-axis. Lattice constants were inspected by the X-ray Diffractometer (XRD) and through Fourier Transform-Infrared Spectrophotometer (FT-IR), it observed absorption band. Also, the distributions of Er concentration were confirmed by the electron probe micro analysis (EPMA). Czochralski법을 이용하여 Er2O3가 첨가된 near stoichiometric조성의 LiNbO3 단결정을 Z-축의 방향으로 직경 15~20 mm, 길이 25~30 mm의 크기로 성장시켰다. X-ray Diffractometer (XRD)을 이용하여 격자상수를 조사하였고, Fourier Transform Infrared Spectrophotometer (FT-IR)을 통하여 흡수밴드를 관찰하였다. 또한 Electron Probe Micro Analysis (EPMA)를 이용하여 결정 내에 Er의 분포를 확인하였다.

바른 태권도 현대사 정착을 위한 담론 -김용옥의 「태권도철학의 구성원리」에 나타난 오류를 중심으로-

이성문,여인성 한국체육철학회 2012 움직임의철학 : 한국체육철학회지 Vol.20 No.3

This study is to shed new light on Taekwondo's modern history which is being misinformed by some of scholars. Especially, this study stands against「Principles Governing the Construction of the Philosophy of Taekwondo」 by Young-Oak Kim, which misinforms the modern history of Taekwondo. As a result we found following conclusions. First, as all the cultures and history, Taekwondo has a diachronie nature and it also can be called in a general term just like ancient Korean language and ancient Korean history. Second, the masters of the Taekwondo mainstay studios practiced not only Karate, but also Korean and Chinese martial arts in the period of Japanese occupation. On the basis of these, Korean martial arts developed into Taekwondo. Third, during Japanese military ruling Japanese imperialism conducted severe policies to eliminate Korean culture. So they tended to get rid of all the Korean traditional martial arts. Therefore Taekwondo had to be under Karate's influence but it doesn't mean that Taekwondo which has very rich history is subtype of Karate. 본 연구는 일부 학자들에 의해 와전되고 있는 태권도 현대사를 재조명하는데 그 목적이 있다. 특히, 수정주의적 입장을 대표하는 김용옥의 「태권도철학의 구성원리」에 나타난 태권도 현대사에 대한 오해에 반론을 제기하였으며 연구결과는 다음과 같다. 첫째, 태권도는 역사 속에 존재해온 모든 문화의 역사가 그러하듯 통시태적 성격을 지니고 있으며 보편적 원리에 의해 태권도라는 특칭명사는 고대한국어, 고대한국사와 같이 전칭명사로 환원될 수 있다. 둘째, 근대 태권도의 모체가 되었다고 할 수 있는 5개 기간도장의 전수자들은 일제 강점기에 가라테 뿐만이 아니라 전통무예와 중국무술을 수련하였으며 해방 이후 이를 토대로 전래되던 전통무예를 근대화하여 태권도로 발전시켰다. 셋째, 무단통치 기간 중 일본 제국주의는 철저한 민족말살정책의 자행으로 전래되던 전통무예의 교수매체에 대한 단절을 꾀하였고 이로 인해 태권도는 가라테의 영향을 받게 되지만 이를 근거로 유구한 역사를 가진 태권도를 가라테의 아류로 폄하할 수는 없다.