http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
낭종성 종괴로 발견된 췌체부의 원발성 선편평상피암종 1예
손준혁,이상협,차병효,황진혁,이윤빈,윤유석,김소연,김혜령 대한내과학회 2011 대한내과학회 추계학술대회 Vol.2011 No.1
서론: 췌장의 선편평상피암종은 매우 드문 종양으로 진단이 매우 어려운 것으로 알려져 있다. 이 악성 종양의 예후는 췌관선암에 비해 불량하며, 1년 이상 생존하는 경우는 드문 것으로 알려져 있다. 저자들은 췌장의 낭종성 종괴로 발견된 1 cm 크기의 선편평상피암종을 내시경초음파를 이용해 진단한 증례를 경험하였기에 이를 보고하는 바이다. 증례: 65세 남자가 내원 1주일 전부터 시작된 우상복부 동통을 주소로 내원하였다. 복부컴퓨터단층촬영 검사에서 췌체부에 낭종성 종괴가 관찰되었으며 내시경초음파 검사에서 약 1 cm 크기의 저에코를 보이며 일부 고형성분을 포함하고 주췌관의 확장을 초래하는 췌체부의 낭종성 종괴가 관찰되었다. 가성낭종을 동반한 급성췌장염 진단 하에 내시경 역행췌담관조영술을 시행하여 췌관 협착부위에 스텐트를 삽입하였고 보존적 치료를 4주간 시행하였다. 이후 추적 복부 컴퓨터단층촬영 검사에서 종괴가 여전히 남아 있는 상태로 췌장암의 가능성을 배제하기 어렵다고 판단되어 췌장 원위부 절제술을 시행하였으며 조직병리검결과에서 1기(TNM 분류)의 선편평상피암종으로 진단되었다. 환자는 이후 재발 없이 경과 관찰 중이다. 결론: 저자들은 낭성 종괴로 발현되었으나 내시경초음파 검사를 이용하여 비교적 이른 병기에 진단하여 절제술 후 재발소견 없이 1년 이상 경과관찰 중인 췌장의 선편평상피암종을 경험하였기에 보고한다.
손준혁,박성욱,서보혁,이상철 대한전기학회 2004 전기학회논문지 D Vol.53 No.4(D)
The present DC Motor or STEP Motor have been used in electronic work and products. There are many papers that let those Motor improved more conveniently in controlling and measuring those than before. By controlling and measuring those, the convenience of users and the functions of products can be improved. In addition, the responding speed of whole system can be increased by improving it of controlling and measuring. Therefore it is necessary that we develop motor motion application. Because of this necessity, neural networks was used to improve the responding speed of controlling and measuring, and a new application was developed for the convenience of users. This paper showed that efficiency of controlling methodology by neural-network is superior to others in correctness and speed. We are intend to verify its practical usefulness though experimentations.
착용형 보행 보조 로봇을 위한 센서 데이터 기반 동작 인식 알고리즘
손준혁,손진호,최승진 한국정보과학회 2023 정보과학회논문지 Vol.50 No.9
The present study aimed to comprehensively perform deep learning-based activity recognition for enabling wearable walking-assistive robots to accurately identify corresponding activities using sensor data. Dataset used for this study was obtained from rehabilitation training of walking-assistive robot wearers. To optimize the training process of deep neural networks, we conducted careful processing and refinement of the data, eliminating unnecessary segments. We systematically compared various deep neural network architectures, including Convolutional Neural Network(CNN), Long Short-Term Memory(LSTM) and CNN-Gated Recurrent Unit(GRU), to identify the most effective model for activity recognition in wearable walking-assistive robots. Our experiments conducted using real-world data demonstrated that all deep neural networks used in this study performed comparably well, with LSTMs showing a slight advantage for our specific problem. This research contributes valuable insights and advancements towards enhancing capabilities of wearable walking-assistive robots, highlighting the potential for further improvements in this domain.
A Study on Aging Fracture Behavior of Sintered Joint by Bi-Modal Cu Paste
손준혁,이창우,유동열,변동진,방정환 대한용접접합학회 2022 대한용접·접합학회지 Vol.40 No.6
Power semiconductors for automobiles were joined by high Pb soldering to joint properties at high temperatures during operations. However, this process is being replaced by low-temperature sintering. In the low-temperature sin- tering bonding method, Cu powder is low-cost and exhibits high-performance material and excellent bonding properties. In this study, the effect of high-temperature aging on Cu paste sintered joints and the failure mechanism of the shear test were investigated. Cu monomodal and bimodal pastes were manufactured, and electroless nickel immersion gold (ENIG) surface treatment was applied on the Cu chip side. In the ENIG-treated joints, a significant number of Kirkendall voids were observed at the interface under Au after 2,000 h at 200 °C, and Cu2O was also formed. This is attributed to the difference between the interdiffusion coefficients of Au and Cu, which decreases the shear strength of the junction and rapidly increases the electrical resistance. After the shear strength tests, the crack propagation pattern at the interface of the ENIG-treated joint was confirmed via cross-section scanning electron microscopy. Future studies on surface treatment are required to clarify the long-term stability of the joints.