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최명진,안병구 한국인터넷방송통신학회 2011 한국인터넷방송통신학회 논문지 Vol.11 No.2
안드로이드는 구글이 만든 모바일폰용 OS이다. 안드로이드의 등장으로 모바일 개발 공동체 양상을 바꾸어 놓았으며 현재 수많은 모바일용 프로그램이 안드로이드 플랫폼 기반으로 제작되고 있다. 본 논문에서는 위치 기반 서비스를 이용한 안드로이드 플랫폼 기반 모바일 교통 정보 시스템을 제안 개발 한다. 개발된 시스템의 주요한 특징 및 기여도는 다음과 같다. 첫째, 모바일 기반의 교통 정보 시스템 프로그램으로써 공간의 제약을 받지 않는다. 둘째, 기본적인 정보제공 외에도 전화, 홈페이지 바로가기 기능을 사용할 수가 있다. 셋째, 사용자 스스로가 자신이 자주 찾는 장소의 정보를 입력할 수 있도록 한 사용자 맞춤형 프로그램이다. 개발된 시스템의 성능평가는 안드로이드 SDK 1.5용 AVD(Android Virture Device)를 사용하였다. Android is the OS for mobile phones created by Google. Android has changed the situations of mobile developing community, and currently many of mobile programs based on the android platform are designed. In this paper, android platform based traffic information system by using LBS is proposed and developed. The main contributions and features of the proposed system are as follows. First, no space constraints as mobile based traffic information system. Second, basic information services as well as telephone service. direct homepage service. Third, user oriented suitable program that can be made by users themselves. The performance evaluation of the developed system is performed by using AVD (Android Virture Device) for Android SDK 1.5.
활성화 반응성 증착법에 의한 ${In_2}{O_3}$박막성장 및 특성
최명진,정진원,왕진석 한국전기전자재료학회 1992 電氣電子材料學會誌 Vol.5 No.4
활성화 반응성 증착법으로 비저항 1.7*$10^{-3}$-8.0*$10^{-3}$ohm.cm, 전하운반자 농도 3.4*$10^{19}$-2.8*$10^{20}$$cm^{-3}$, 이동도 12-23$cm^{2}$/V.s, 금지대역 폭 3.35eV인 In/sib 2/ $O_{3}$박막을 KBr과 실리카 기판에 성장시켰다. 광투과율은 가시광선 영역에서 80% 이상을 나타냈으며 적외선 영역에서도 양호한 특성을 나타냈다. 박막성장시는 비정질 상태였으나 150.deg.C 이상에서 열처리했을 때 결정화현상이 관찰되었다.
극대화된 밴드갭을 갖는 켈빈 격자 구조의 아이소-지오메트릭 최적 설계
최명진,오명훈,조선호,구본용,Choi, Myung-Jin,Oh, Myung-Hoon,Cho, Seonho,Koo, Bonyong 한국전산구조공학회 2019 한국전산구조공학회논문집 Vol.32 No.4
밴드갭은 기계적 파동의 전파가 금지되는 특정 주파수 범위를 의미한다. 본 연구는 경사도 기반의 설계 최적화 방법을 사용하여 낮은 가청 주파수 범위에서 밴드갭을 갖는 3차원 켈빈 격자를 설계하는 것을 목적으로 하고 있다. 블로흐 이론을 이용하여 무한주기 격자에서의 탄성파 전파를 해석하고, 기하학적으로 엄밀한 빔 이론에서 선형화를 통해 얻은 전단 변형 가능한 빔 모델을 사용하여 격자 구조 연결선을 모델링하였다. 주어진 격자 구성에서 중립 축 및 단면 두께를 B-spline 함수를 이용한 아이소-지오메트릭 매개화를 통해 설계 변수로 정의하고, 격자 구조의 밴드갭의 크기를 극대화하는 최적 설계를 수행하였다. A band gap refers to a certain frequency range where the propagation of mechanical waves is prohibited. This work focuses on engineering three-dimensional Kelvin lattices having external band gaps at low audible frequency ranges using a gradient-based design optimization method. Elastic wave propagation in an infinite periodic lattice is investigated by employing the Bloch theorem. We model the ligaments using a shear-deformable beam model obtained by consistent linearization in a geometrically exact beam theory. For a given lattice topology, we enlarge band gap sizes by controlling the configuration of the beam neutral axis and cross-section thickness that are smoothly parameterized by B-spline basis functions within the isogeometric analysis framework.
丹參을 뇌졸중 동물모델에 적용하기 위한 기초적인 네트워크 약리학 분석
최명진,양원진,이병호,조수인 대한한의학방제학회 2021 大韓韓醫學方劑學會誌 Vol.29 No.1
Objectives : The root of Salvia miltiorrhiza, known as ‘Dansam (DS, 丹參)’, is used for and treating cardiovascular diseases based on its efficacy of promoting blood circulation and breaking through a blood stasis. In this study, we would like to see if DS could be effectively used for stroke from the perspective of network pharmacology. Methods : The analysis was conducted using Traditional Chinese Medicine Systems Pharmacology Database and Analysis Platform (TCMSP) database to derive the main active compounds of DS and identify the mechanism of each compound acting on the human body. The networks between compounds, target protein and disease were expressed through Cytoscape. Protein-protein interaction (PPI) analysis was performed using STRING database. Results : Fifty two active compounds of DS were identified by screening the ingredients of DS through TCMSP. Based on the networks of these compounds with target protein and disease, it can be said that DS might be effective for preventing and treating stroke. PPI result showed that adrenergic receptor has many interactions among proteins, indicating its significance in stroke pathway. Conclusion : In this study, we derived target proteins and target diseases of DS that could be used in study of stroke. However, since it is uncertain if these targets can be controlled by DS extracts or not, we would like to confirm the results with further animal experiments.
국내 105밀리 고폭탄 추진제의 저장수명 예측에 관한 연구
최명진,박형주,양재경 한국산업경영시스템학회 2014 한국산업경영시스템학회 학술대회 Vol.2014 No.춘계
Domestic 105㎜ HE (High Explosive) shell is divided into three parts (Fuze, Projectile and Propellants). Among three parts, propelling charge of propellants part consists of single base propellants. The lifespan of single base propellants is affected by a storage period. These are because Nitrocellulose (NC) which is the main component of propelling gunpowder can be naturally decomposed to unstable substances similar with other nitric acid ester. Even though it cannot be prevented fundamentally from being disassembled, a decomposition product (NO₂, NO₃, and HNO₃) and tranquillizer DPA (Diphenylamine) having high reactivity are added into a propellant to restrain induction of automatic catalysis by a decomposition product. The decay rate of the tranquillizer is also affected by a production rate of the decomposition product of NC. Therefore, an accurate prediction of the Self-Life is required so that it is ensure against risks. Hereupon, this paper presents a new methodology to estimate the shelf-life of single base propellants using data of ASRP (Ammunition Stockpile Reliability Program) to domestic 105mm HE (propelling charge of propellants part). We selected four attributes that is inferred to have influence on distribution of the DPA amount in a propellant from the ASRP dataset through data mining processes. Then the selected attributes were used as independent variables in a regression analysis in order to estimate the shelf-life of single base propellants.
최명진,박홍을,Choi Myung-Jin,Park Hong-Eul 한국시뮬레이션학회 2005 한국시뮬레이션학회 논문지 Vol.14 No.4
To investigate the characteristics of the sound-pipe on the top of King Song-Dok bell, using computer simulation, the throat impedance was evaluated for the straight pipe and conical pipes with varying taper angles. When sound propagates in a rigid walled, unflanged circular pipe with wavelength larger than radius, the acoustic motion is planar, much as in a bar. The incident sound waves are reflected at the end of pipe and some of them are transmitted. The reflection coefficient and radiation impedance of the sound-pipe of King Song-Dok bell were calculated, and the results demonstrated that the high frequency sound is radiated through the sound-pipe. It behaves like a frequency filter.