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김예현,김동일,장호경,Kim, Ye-Hyun,Kim, Dong-Ill,Jang, Ho-Kyeong 한국음향학회 1995 韓國音響學會誌 Vol.14 No.3
실외에서 실험으로 불연속 지면의 조건을 고려하여 방음벽에 의한 삽입손실을 고찰하였다. 측정은 음원, 수음점 그리고 방음벽의 여러 기하학적 조건에 대하여 315 Hz ~ 3150 Hz 사이의 1/3옥타브밴드 주파수대역으로 수행하였다. 간섭이 일어난 주파수 영역은 방음벽 상단부에서 수음점까지의 경로차와 방음벽과 수음점 사이의 지면의 음향학적 성질에 의존하였다. 연구 결과 방음벽에 의한 삽입손실은 방음벽에 의한 회절과 함께 지면의 특성에 의존함을 확인 하였다. Outdoor experimental study is presented the insertion loss caused by barrier considering discontinuous ground condition. Measurements ware made in 1/3 octave band over the frequency range 315 Hz~3150 Hz with the various geometry of the source, receiver and barriers. The frequency range of the interference pattern depends on the phase difference between path from the edge of barrier to receiver, and hence on the acoustical properties of the ground on the receiver side of the barrier. The insertion loss by barrier, in addition to diffraction, is shown to be dependent on the ground characteristic.
Pb(Ni₁/₃Nb₂/₃)O₃-PbTiO₃-PbZrO₃계 세라믹스의 유전 및 압전특성
전건호,김예현 嶺南大學校附設 基礎科學硏究所 1989 基礎科學硏究 Vol.9 No.-
0.45Pb(Ni₁/₃Nb₂/₃)O₃-0.55[xPbTiO₃-(1-x)PbZrO₃] piezoelectric ceramics were fabricated by ordinary firing method at temperature range 1180∼1260℃. The effect of PbTiO₃contents and sintering temperature on dielectric and piezoelectric properties of the system were investigated. The experimental results indicated that the specimens containing 65mole% PbTiO₃sintered at 1240℃ showed the best dielectric and piezoelectric characteristics. The Curie temperature was increased and the grain size was enlarged with increasing of PbTiO₃contents. And the remanent polarization was decreased while coercive field was increased with increasing of PbTiO₃contents.
김예현,박주헌,임하진,최용준,최현정,최현우,기승정,김수현,신종희,신명근 대한진단검사의학회 2024 Laboratory Medicine Online Vol.14 No.1
Acute promyelocytic leukemia (APL) is a distinct acute myeloid leukemia characterized by abnormal promyelocyte predominance. Typical APL cases rarely present dysplastic changes and disease progression of de novo myelodysplastic syndrome to APL is also very uncommon, which makes APL suspicion difficult in cases with dysplasia. Here, we report a unique case of APL featuring morphologic dysplasia. As for our patient, there were several additional unusual findings: the initial bone marrow examination did not reveal an increase in promyelocytes, but rather showed a modest increase in myeloblasts with normal coagulation profiles and a normal karyotype. Moreover, decrease of initially detected ETV6 mutations as well as new FLT3 mutations were observed on repeated targeted sequencing. The possibility of APL should not be overlooked even at the slightest increase of promyelocytes, and early diagnostic tests for fusion transcripts should be considered.
金禮顯 嶺南大學校附設 基礎科學硏究所 1982 基礎科學硏究 Vol.2 No.-
The purpose of this paper is to present, in as simple and concise a form as possible, the fundamental and general principles underlying the physical aspects of absorption mechanism of acoustic waves. It has been studied especially the dependence of sound absorption on temperature and humidity.
과학기술분야 기관 연구데이터 리포지터리 운영 활성화 방안 연구
김예현,김지현 한국비블리아학회 2023 한국비블리아학회지 Vol.34 No.3
본 연구의 목적은 과학기술분야 연구기관에서 운영되는 기관 연구데이터 리포지터리 운영 현황을 파악하고 활성화 방안을 제시하는 것에 있다. 이를 위해 문헌 연구와 사례 분석, 국내외 기관 리포지터리 담당자와의 인터뷰를 수행하였으며, 리포지터리 규정 및 정책 수립, 연구데이터 공유 인식 개선, 연구데이터 품질 관리 강화를 골자로 하는 기관 연구데이터 리포지터리 운영 활성화 방안을 제안하였다. 첫째, 리포지터리 규정 및 정책 수립 측면에서는 현재 연구데이터와 관련한 규정인 국가연구개발정보 처리기준의 지위 향상과 리포지터리 근거 규정의 명시가 필요하다고 보았다. 둘째, 연구데이터 공유 인식 개선 측면에서 전반적인 연구데이터 교육과 우수 사례 발굴의 필요성을 제안하였다. 셋째, 연구데이터 품질 관리 강화 측면에서 연구자-담당자-위원회의 상호작용과 표준화 작업, 장기 보존을 위한 준비의 필요성을 제안하였다. The purpose of this study is to identify the current status of institutional research data repositories in the field of science and technology and to suggest ways to activate them. The study conducted literature research, case analysis, and interviews with repository managers both domestically and internationally. The study suggested strategies with a focus on establishing repository regulations and policies, improving awareness of research data sharing, and enhancing research data quality management. First, in terms of repository regulations and policy establishment, it was considered necessary to promote the status of the National R&D Information Processing Standards, a regulation related to research data, and clarify repository basis regulations. Second, to enhance awareness of research data sharing, the need for comprehensive research data education and the identification of exemplary cases were suggested. Third, in terms of strengthening research data quality management, the need for preparation for interaction between researchers-persons in charge-committees, standardization work, and long-term preservation was suggested.
李俊河,金禮顯 嶺南大學校附設 基礎科學硏究所 1981 基礎科學硏究 Vol.1 No.-
This paper described Acoustic Waveguide of the various type (Conical, Bessel, Exponential, Parabolic) on the cross sectional area, S of Webster's approximate wave equation.