(A) Comparision of Boolean Ranks and Their Preservers

양성대 제주대학교 대학원 1998 국내석사

말씀과 삶 교회론 분석

양성대 장로회신학대학교 1988 국내석사

실시간 차량 시뮬레이터의 개발에 관한 연구

양성대 전남대학교 대학원 2002 국내석사

컴퓨터그래픽스의 활용을 통한 모바일콘텐츠 캐릭터디자인 연구 : 휴대폰에 있어서의 제주상징물 캐릭터디자인의 적용을 중심으로

양성대 濟州大學校 産業大學院 2002 국내석사

Since the industrial revolution, the range of the graphic design has been broad from the beginning of the modern design to nowadays and developed remarkably with the introduction of the high technology society. These days people use computer tools in major graphic process. It is true that people use computer graphics vigorously in character design and among them are various drawing programs and 3D animation programs. To make a character a product, there should be the coherent strategy through the basic design, the story development, and marketing. Character industry is non-pollution and high profit industry beyond moneymaking concept. Currently, we can find that most of products are wrapped by character design if we look at them carefully. Also, within recent years, character design is used variously in the market of on-line vs. off-line and wired vs. wireless. Based on this, it is urgent to develop symbol characters of Jeju in the area of mobile contents and manage them thoroughly to maximize the profit. Mobile character has a unique characteristic and an effect though it is included in the wider range of the character industry. Mobile character design is a graphic in terms of graphic design and a product in terms of industry. Mobile character is connected to the huge marketing arena by creativity and the creativity should have the identity that is coherent. Currently, mobile character is usually made by the dot graphic technology. This thesis studies on the mobile character design using computer graphics and the way to develop it from the Jeju symbol images with the consideration of the development process. In terms of using those characters, it mainly focuses on the mobile contents of cellular phones.

A Comparison of Boolean Ranks and Their Preservers : 부울계수들에 대한 비교와 이들의 선형 연산자

양성대 濟州大學校 大學院 1998 국내박사

부울 행렬들상에서 부울계수, 열계수, 극대열계수가 이제까지 많이 연구, 개발되어 왔었고, 이들을 보존하는 선형 연산자들에 관한 특성이 부울 행렬들상에서 밝혀졌다. 이 논문에서는 부울계수와 극대열계수의 관계를 β 함수를 이용하여 비교함으로써, 각각 이항 부울대수와 양의 정수, 양의 실수, 부울대수상의 행렬들에 대한 β 함수값을 대한 그리고 부울 행렬들상에서 극대열계수를 보존하는 선형 연산자의 형태를 규명하고 특성들을 밝혔다. Boolean rank, column rank, and maximal column rank over Boolean matrices have been studied and developed so far. And their preservers also have been characterized over Boolean matrices. In this thesis, we compare Boolean rank and maximal column rank by the way of a function, i and we obtain the values of this function on the matrices over binary Boolean algebra, nonnegative integers, nonnegative reals, and general Boolean algebra, respectively. Finally we also characterize the linear operators that preserve maximal column rank over general Boolean matrices.

Shooting methods for numerical solutions of control problems constrained by linear and nonlinear hyperbolic partial differential equations

양성대 Iowa State University 2004 해외박사

본 논문에는 뉴튼방법을 기본으로한 슈팅방법을 통해 제어 가능한 문제(controllability problem)를 최적의 제어(optimal control)문제로 전환하여 해결하는 수치적 방법에 대해 연구되어졌다. 최적제어 문제는 선형(linear)과 반선형(semilinear) 미분방정식을 조건으로 갖는 문제로 제어 목표는 원하는 마지막 상태를 추적하는 것이고 제어방식은 분포된 형태(distributed type)과 경계 형태(boundary type)을 모두 다루었다. 일반적으로 최적의 문제의 해를 수치적으로 해결하는데 Gradient 알고리듬을 이용하는 것이 보편적인데, 이는 초기치의 설정에 따라 그 계산량이 크게 변하는 경향을 갖고 있어 이를 해결하기 위해 많은 연구들이 이루어지고 있다. 이 논문에서는 주어진 문제를 효과적이면서 빠르게 수치해를 구해 낼 수 있는 슈팅방법을 소개함과 동시에 최적의 수치해가 제어 가능한 문제의 해로 접근함을 증명하였다. 최적제어 문제의 해를 구하기 위해서 Lagrange의 법칙을 써서 최적화 문제를 Optimality 시스템으로 전환한다. 이 시스템은 초기치 문제와 최종치 문제를 병행하고 있어 시간이 증가함에 따라 동시에 문제를 해결할 수 없는 특징을 갖고 있다. 그리하여 슈팅방법을 통해 이 시스템을 두 개의 초기치 문제로 전환하여 시간의 증가에 따라 동시에 수치해를 구할 수 있게 해 준다. 또한 이 방법을 통해 1차원 그리고 2차원의 예를 통해 계산된 수치 결과를 제시하였다. We consider shooting methods for computing approximate solutions of control problems constrained by linear or nonlinear hyperbolic partial differential equations. Optimal control problems and exact controllability problems are both studied, with the latter being approximated by the former with appropriate choices of parameters in the cost functional. The types of equations include linear wave equations, semilinear wave equations, and first order linear hyperbolic equations. The controls considered are either distributed in part of the time-space domain or of the Dirichlet type on the boundary. Each optimal control problem is reformulated as a system of equations that consists of an initial value problem (IVP) for the state equations and a terminal value problem for the adjoint equations. The opimality systems are regarded as a system of an IVP for the state equation and an IVP for the adjoint equations with unknown initial conditions. Then the optimality system is solved by shooting methods, i.e. we attempt to find adjoint initial values such that the adjoint terminal conditions are met. The shooting methods are implemented iteratively and Newton's method is employed is employed to update the adjoint initial values. The convergence of the algorithms are theoretically discussed and numerically verified. Computational experiments are performed extensively for a variety of settings : different types of constraint equations in 1-D or 2-D, distributed or boundary controls, optimal control or exact controllability.

Combined treatment of bacteriophages, UV-C light, and lauric arginate (LAE) to inhibit listeria monocytogenes on chicken breast tissue

양성대 중앙대학교 대학원 2016 국내석사

현재 증가하는 치킨소비로 인해 L. monocytogenes의Listeriosis 발병에 대한 우려가 높아지고 있다. 농촌경제연구원의 예측 정보에 따르면 2005년부터 돼지, 계란, 닭 순으로 소비가 증가하고 있을 뿐만 아니라 소비자 가격측면에서도 가격이 한 해가 지날수록 감소된다. 이는 향후 더욱 큰 치킨의 소비 증가가 예상된다. 이에 대한 방안으로 본 연구에서는 물리적 처리방법인 UV-C light (600, 1200, 1800, and 2400 mJ/cm2), LAE (100, 200 and 400 mg/kg)와 생물학제제인 Listeria Bacteriophages를 이용하여 닭가슴살의 품질 손상 없이 Listeria monocytogenes의 살균효과를 극대화시키고자 한다. UV-C의 조사량과 LAE의 농도가 증가할수록 L. monocytogenes가 유의적으로 (p < 0.05) 감소하였고 Bacteriophages 처리의 경우 1일 경과 후 L. monocytogenes가 유의적으로 감소하였다(p < 0.05). 이에 따라 UV-C light (600, 1200, 1800, and 2400 mJ/cm2)와 bacteriophages로 병용 처리된 닭가슴살은 각각 1.48, 1.66, 1.74, 2.04 log CFU/g 감소하였다. LAE (100, 200, and 400 mg/kg)과 bacteriophages로 처리된 닭가슴살의 L. monocytogenes는 각각 1.24, 1.45, 1.96 log CFU/g 감소하였다. 두 종류의 병용처리된 닭가슴살을 4℃에서 3일 동안 저장 후 pH, TBARS, 색차를 측정한 결과, 대조군에 비해 유의적 차이가 없었다(p < 0.05). 그러나 외관을 고려한다면 UV 1,800 mJ/cm2와 bacteriophages,200 ppm LAE와 bacteriophages의 병용처리 조건이 닭가슴살의 품질을 유지하면서 L. monocytogenes를 저감화시키는데 효과적이라고 판단된다. 본 연구결과는 닭고기의 미생물학적 안전성 확보기술 개발에 기여할 것이다. The inhibitory effect of a commercial bacteriophage preparation (ListShield) on Listeria monocytogenes, alone or in combination with treatment with lauric arginate ethyl ester (LAE), Ultraviolet-C, was studied using artificially inoculated fresh chicken breast tissue. A mixture of three L. monocytogenes strains (ATCC 19113, ATCC 19115, and ATCC 13932) was inoculated in fresh chicken breast tissue at approximately 4.5 log CFU/g, followed by treatment with UV-C radiation at 260 nm (four dose 600, 1200, 1800, and 2400 mJ/cm2) and/or bacteriophage preparation Listshield. In case of LAE treatment, LAE (100, 200, and 400 mg/kg) was sprayed and/or sprayed bacteriophage preparation Listshield. Tissues samples were analyzed after 5 min, followed by storage at 4°C for 1, 2, and 3 days. The L. monocytogenes with 600-2400 mJ/cm2 of UV-C maximally reduced by 1.23, 1.47, 1.53, and 1.58 log CFU/g, respectively, compared to the untreated control samples. The counts of these bacteria were significantly difference (p < 0.05) reduced by as stepwise increasing of UV-C dosage. After a single round of treatment with bacteriophages, about 0.56, 0.84, 0.46, and 0.10 log CFU/g reduction was observed after day 0, 1, 2, and 3 days, respectively, compared to the control samples. Significant differences were noted between the treated and control samples (p < 0.05) at 0, 1, and 2 days. After combined treatment with UV-C and bacteriophage, the L. monocytogenes was reduced more significantly by 1.48, 1.66, 1.74, and 2.04 log CFU/g, at 0 day (1-3 h) respectively. In case of LAE treatment, the L. monocytogenes with 100, 200, and 400 mg/kg of LAE were reduced by 0.45, 0.69, and 1.15 log CFU/g at 1day respectively, compared to control samples. After combined treatment with bacteriophages and LAE (100, 200, and 400 mg/kg), the L. monocytogenes count was reduced more significantly by 1.24, 1.45, and 1.96 at 1 day respectively. Following 3 days of treatment, the viable bacterial count of samples of combined treatment with bacteriophages and UV-C irradiation gradually increased to approximately 4.0 log CFU/g regardless of all the UV doses. Also, in the combined LAE and Phages treated samples, reached to approximately 4.5 log CFU/g regardless of all concentrations of LAE. However, no significant difference was observed in the surface color, pH, TBARS content, and visual appearance of the treated and control samples during the 3 days post treatment. Thus, a commercial bacteriophage preparation can be very effective in reducing L. monocytogenes load in chicken fillets, either alone or in combination with UV-C light and LAE treatment.