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Bandgap Tuning and Quenching Effects of In(Zn)P@ZnSe@ZnS Quantum Dots
이상연,박수현,BYUN GYUNGSU,김창열 한국분말재료학회 2024 한국분말재료학회지 (KPMI) Vol.31 No.3
InP quantum dot (QDs) have attracted researchers’ interest due to their applicability in quantum dot light-emitting displays (QLED) or biomarkers for detecting cancers or viruses. The surface or interface control of InP QD core/shell has substantially increased quantum efficiency, with a quantum yield of 100% reached by introducing HF to inhibit oxide generation. In this study, we focused on the control of bandgap energy of quantum dots by changing the Zn/(In+Zn) ratio in the In(Zn)P core. Zinc incorporation can change the photoluminescent light colors of green, yellow, orange, and red. Diluting a solution of as-synthesized QDs by more than 100 times did not show any quenching effects by the Förster resonance energy transfer phenomenon between neighboring QDs. InP quantum dots (QDs) have attracted researchers’ interest due to their applicability in quantum dot light-emitting displays (QLED) or biomarkers for detecting cancers or viruses. The surface or interface control of InP QD core/ shell has substantially increased quantum efficiency, with a quantum yield of 100% reached by introducing HF to inhibit oxide generation. In this study, we focused on the control of bandgap energy of quantum dots by changing the Zn/(In+Zn) ratio in the In(Zn)P core. Zinc incorporation can change the photoluminescent light colors of green, yellow, orange, and red. Diluting a solution of as-synthesized QDs by more than 100 times did not show any quenching effects by the Förster resonance energy transfer phenomenon between neighboring QDs.
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Physics-Informed Neural Networks 연구 동향 및 농업 분야 발전 방향
이상연,신학종,박대헌,최원규,조성균,S.Y. Lee,H.J. Shin,D.H. Park,W.K. Choi,S.K. Jo 한국전자통신연구원 2024 전자통신동향분석 Vol.39 No.4
Mathematical modeling is the process of representing physical phenomena using equations, and it often describes various scientific phenomena through differential equations. Numerical analysis, which is capable of approximating solutions to partial differential equations representing physical phenomena, is widely utilized. However, in high-dimensional or nonlinear systems, computational costs can substantially increase, leading to potential numerical instability or convergence issues. Recently, Physics-Informed Neural Networks (PINNs) have emerged as an alternative approach. A PINN leverages physical laws even with limited data to provide highly reliable predictive performance and can address the convergence issues and high computational costs associated with numerical analysis. This paper analyzes the weak signals, research trends, patent trends, and case studies of PINNs. On the basis of this analysis, it proposes directions for the development of PINN techniques in the agricultural field. In particular, the application of PINNs in agriculture is expected to be more effective than in other industries because of their ability to reflect real-time changes in biological processes. While the technology readiness level of PINNs remains low, the potential for model training with minimal data and real-time prediction capabilities suggests that PINNs could replace traditional numerical analysis models. It is anticipated that the research and industrial applications of PINN will develop at an increasing pace while focusing on addressing the complexity of mathematical models in agriculture, mathematical modeling and the application of various biological processes; securing key patents related to PINNs; and standardizing PINN technology in the field of agriculture.
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李尙淵,李錫仁 중앙대학교 스포츠과학연구소 1994 體育硏究 Vol.- No.7
Since the Comparative physical Education has much influence upon cultural and political exchanges between the countries. defining it is a basic necessity in historical, political, social and philosophical research of Physical Education itself that our generation requires. It's object is to establish the studyt in Physical Education. 1. In order to define Comparative Physical Education, one must comprehend that is the origin. One must compare and define philolophical, historical, sociological, economical, anthropological, social scientifical domain that are in contiguity with it. 2. Comparative Education is comparing the different types of culture and education system, finding the similarities and differences, understand the problems that are common among the caluse. 3. The range of Comparative Physical Education is to research on Physical Education and social culture or humanism of sports. It muist also define the development of such things as a self-realization, sentiment about human and sports. 4. The range of Comparative Physical Education and sports must be researched relating it to the reliability of statistical data, differences and similarities between the countries, and to the studies that are in contiguity with it.
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이상연,전지훈,이강복 한국통신학회 2023 韓國通信學會論文誌 Vol.48 No.11
무인 이동체을 이용한 드론이나 로봇은 다양한 분야에서 사용되고 있으며 특히 통신 인프라가 설치되어있지 않거나 파괴된 재난 안전과 군사 분야에서 편대 및 군집 비행에 관한 관심이 높아지고 있다. 편대 및 군집 비행으로 인명 탐색 또는 정찰 같은 임무를 한정된 자원을 가진 무인 이동체 간의 협력으로 더 넓은 지역을 탐색하거나짧은 시간 내에 임무를 마칠 수 있는 이점이 있다. 통신 인프라가 설치되어있지 않은 지역 또는 통신 인프라가파괴된 재난 상황에서 안전한 편대 및 군집 비행을 이루기 위해서는 무인 이동체 간의 통신이 필수적이다. 본 논문에서는 편대비행을 위한 선도기와 추종기의 통신망으로 BLE 애드혹 망을 지원하는 BLE 통신 모듈을 사용함으로써 편대비행이 가능함을 보였다.
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