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복잡성 과학으로 본 깨달음의 과정 - 싯닷타의 수행과 팔정도 -
김명준 한국불교학회 2022 韓國佛敎學 Vol.104 No.-
본고는 과거와 다른 현세대를 위해 불교 수행을 현대 과학의 언어인 통계물리학에서 파생된 복잡성 과학으로 고찰한다. 복잡성 과학은 상호작용하는개체들의 군집에서 발생하는 창발 현상을 연구하고 예측하는 분야다. 복잡계는 1) 개체들의 상호작용, 2) 되먹임 고리, 3) 열린 시스템, 4) 비선형성, 5) 복잡적응계, 다섯 가지 특징을 가진다. 본고는 싯닷타의 수행과정으로 드러나는 복잡계의 다섯 특징을 소개한다. 이를 통해 깨달음이 어떠한 과정을 통해가능한지에 대해 고찰하며, 이 과정을 체계화 시킨 팔정도의 실용성을 도출한다. 붓다의 깨달음은 기존 인도철학의 개체중심적 사고에서 관계중심적 사고로의 전환을 통해 나타난다. 다시 말해 모든 현상은 다양한 조건들의 관계에 따라 형성된 것으로, 이 관계의 반복적이고 끊임없는 상호작용으로 말미암아 형성된 것은 무한히 변화한다. 또환 현상은 하나의 시스템으로서 언제나 다른시스템과 상호작용하는 개방된 특성을 보인다. 이러한 특성을 가지는 시스템은 매우 복잡해 변화를 예측하는 것은 쉽지 않다. 복잡계에서 변화는 기존과다른 폭발적인 창발 현상을 일으키기 때문이다. 현대는 다양성의 시대로, 이 다양한 구성요소들의 상호작용으로 말미암아점점 더 미래의 일은 예측하기 어려워지고 있다. 그래서 과거보다 복잡해진현대에 현상의 전체 구조에 대한 통찰은 어느 때 보다 중요하다. 깨달음은 일어나고 사라지는 현상에 대한 통찰이다. 따라서 본고는 팔정도의 실용성을 점점 예측이 어려워지는 현대사회를 살아가는 세대에게 불교가 제안할 수 있는하나의 가능성으로 제시한다.
그래프 신경망을 활용한 재무정보 기반 기업 신용평가모형 개발
김명준,김태겸,안영주,장봉규 한국재무학회 2024 한국재무학회 학술대회 Vol.2024 No.11
본 연구에서는 그래프 신경망 모형을 포함한 6개의 기계학습모형을 활용하 여 한국 기업의 신용변동을 예측하였다. 이를 예측하기 위해 수익성, 성장성, 안정성, 활동성 지표들을 활용하였고, 주성분 분석을 진행하여 지표별로 두 개씩 활용하였다. 또한, 신용등급변동이 없는 경우가 대다수인 불균형 데이 터를 처리하기 위해 SMOTE 방법론을 활용하여 데이터를 오버샘플링하였 다. 본 연구에서는 산업구조를 반영하기 위해 이를 나타내는 법인형태, 데이 터 시점, 현재 신용등급과 업종의 네 분류로 나누어 모형을 만들고 이를 최 종적으로 앙상블하여 예측 결과를 도출하였다. 결과를 살펴보면, 모든 모형 이 데이터 비중에 맞게 선택하는 벤치마크 모형보다 우수하고, 그래프 신경 망 모형이 특히 더 우수한 성능을 나타내는 것을 확인할 수 있다. 또한, 변 수 중요도를 분석한 결과, 성장성 지표와 활동성 지표가 중요한 것을 확인할 수 있었고, 그래프 신경망에서는 업종 그래프와 법인형태 그래프가 성능이 좋은 것을 확인할 수 있었다.
타워크레인 자율화를 위한 가상환경 플랫폼 개발에 관한 연구
김명준,윤인석,김남균,박문서,안창범,정민혁 한국건설관리학회 2022 한국건설관리학회 논문집 Vol.23 No.4
Autonomous equipment requires a large amount of data from various environments. However, it takes a lot of time and cost for an experiment in a real construction sites, which are difficulties in data collection and processing. Therefore, this study aims to develop a virtual environment for autonomous tower cranes technology development and validation. The authors defined automation functions and operation conditions of tower cranes with three performance criteria: operational design domain, object and event detection and response, and minimum functional conditions. Afterward, this study developed a virtual environment for learning and validation for autonomous functions such as recognition, decision making, and control using the Unity game engine. Validation was conducted by construction industry experts with a fidelity which is the representative matrix for virtual environment assessment. Through the virtual environment platform developed in this study, it will be possible to reduce the cost and time for data collection and technology development. Also, it is also expected to contribute to autonomous driving for not only tower cranes but also other construction equipment.
Characteristics and Geoeffectiveness of Small-scale Magnetic Flux Ropes in the Solar Wind
김명준,박경선,이대영,최정림,김록순,조경숙,최규철,김재훈 한국우주과학회 2017 Journal of Astronomy and Space Sciences Vol.34 No.4
Magnetic flux ropes, often observed during intervals of interplanetary coronal mass ejections, have long been recognized to be critical in space weather. In this work, we focus on magnetic flux rope structure but on a much smaller scale, and not necessarily related to interplanetary coronal mass ejections. Using near-Earth solar wind advanced composition explorer (ACE) observations from 1998 to 2016, we identified a total of 309 small-scale magnetic flux ropes (SMFRs). We compared the characteristics of identified SMFR events with those of normal magnetic cloud (MC) events available from the existing literature. First, most of the MCs and SMFRs have similar values of accompanying solar wind speed and proton densities. However, the average magnetic field intensity of SMFRs is weaker (~7.4 nT) than that of MCs (~10.6 nT). Also, the average duration time and expansion speed of SMFRs are ~2.5 hr and 2.6 km/s, respectively, both of which are smaller by a factor of ~10 than those of MCs. In addition, we examined the geoeffectiveness of SMFR events by checking their correlation with magnetic storms and substorms. Based on the criteria Sym-H < -50 nT (for identification of storm occurrence) and AL < -200 nT (for identification of substorm occurrence), we found that for 88 SMFR events (corresponding to 28.5 % of the total SMFR events), substorms occurred after the impact of SMFRs, implying a possible triggering of substorms by SMFRs. In contrast, we found only two SMFRs that triggered storms. We emphasize that, based on a much larger database than used in previous studies, all these previously known features are now firmly confirmed by the current work. Accordingly, the results emphasize the significance of SMFRs from the viewpoint of possible triggering of substorms.
다양한 조건의 저압 공정 모니터링을 위한 입자 집속 장치 개발
김명준,김동빈,강상우,김태성,Kim, Myungjoon,Kim, Dongbin,Kang, Sang-Woo,Kim, Taesung 한국입자에어로졸학회 2017 Particle and Aerosol Research Vol.13 No.2
As semiconductor process was highly integrated, particle contamination became a major issue. Because particle contamination is related with process yields directly, particles with a diameter larger than half pitch of gate should be controlled. PBMS (Particle beam mass spectrometry) is one of powerful nano particle measurement device. It can measure 5~500 nm particles at ~ 100 mtorr condition in real time by in-situ method. However its usage is restricted to research filed only, due to its big device volume and high price. Therefore aperture changeable aerodynamic lenses (ACALs) which can control particle focusing characteristics by changing its aperture diameter was proposed in this study. Unlike conventional aerodynamic lenses which changes particle focusing efficiency when operating condition is changed, ACALs can maintain particle focusing efficiency. Therefore, it can be used for a multi-monitoring system that connects one PBMS and several process chambers, which greatly improves the commercialization possibility of the PBMS. ACALs was designed based on Stokes number and evaluated by numerical method. Numerical analysis results showed aperture diameter changeable aerodynamic lenses can focus 5 to 100 nm standard particles at 0.1 to 10 torr upstream pressure.
스토리 검색 서비스의 사용자 기록에 나타난 창작 성향 분석 및 가시화
김명준 한국멀티미디어학회 2016 멀티미디어학회논문지 Vol.19 No.8
<Story Helper> is a service providing the story synopses that match user's query. This paper analyzes the user log of <Story Helper> which is the answers to the queries to find stories from database, and shows the tendency distribution of user creation. Specially, we analyze a joint distribution of the genres and actions of stories to get better understanding of the tendencies that cannot be found in the analysis of independent distribution. Furthermore, we define a correlation factor between genre and action, and investigate what combinations of the genres and actions are highly, less, and negatively correlated. Finally, we investigate how the tendencies of characters are related to genres and actions, and propose a visualization method to show the tendencies.
선박의 배기가스 폐열을 활용한 열전발전시스템에 관한 기초 열해석
김명준,가광진,채규훈,김인섭,Kim, Myoung-Jun,Ga, Gwang-Jin,Chea, Gyu-Hoon,Kim, In-Seup 해양환경안전학회 2016 해양환경안전학회지 Vol.22 No.5
IMO (International Maritime Organization) in the UN (United Nations) set up that aim at reducing $CO_2$ emission from ship by up to 30 percent until 2030. The final purpose of this study is the development of marine thermoelectric generation system using waste heat from vessel of internal combustion engines. Before the development of marine thermoelectric generation system, this paper carried out the fundamental heat analysis of marine thermoelectric generation system. It was able to obtain the valuable results about the efficiency improvement of the thermoelectric generation system. The results is as follows : 1) It was confirmed that the efficiency of thermoelectric generation system improves to 8.917 % with increasing the temperature difference of peltier module by reducing the temperature difference between peltier module and heat source at the hot side. 2) System efficiency according to change in the external load resistance was confirmed that the change width of about 6 % which does not significantly occur. 3) System efficiency in the case stainless steel at the same condition is 8.707 %. System efficiency could be confirmed that the stainless steel is higher than duralumin (8.605 %), copper (8.607 %).