Thickness dependence of electrical properties in charge trap flash (CTF) memory with HfO₂ trap and Al₂O₃ blacking layer

오세만,유희욱,조원주 한국진공학회 2009 한국진공학회 학술발표회초록집 Vol.37 No.-

트리 패턴 매칭 최적화

오세만,김정숙 東國大學校 1995 東國論叢 Vol.34 No.-

It is necessary to optimize target machine independent intermediate code since recent researches on complier development are interested retargetable optimization compiler that can produce the code which can be applied for various target machine. there are various kinds of intermediate languages which are designed for the structures of each compiler. We designed and implemented the intermediate code optimizer that performs the optimization with tree pattern matching techniques by selecting EM intermediate language that is abstract machine code and was used an amsterdam Compiler Kit(ACK). This optimizer system consists of two parts : the tree pattern generator and the tree pattern matcher. The tree pattern generator accepts a table which has 645 optimization patterns and was presented by ACK system. And it generates the tree pattern which is suitable for the tree pattern matcher. The tree pattern matcher produces optimized tree in accordance to constructed tree pattern and performs the actual tree pattern optimization actions. As a result, compare to the most of the traditional string pattern matching methods, it gives about 25% of the code reduction effect for the source code - EM code - and it can reduce re-scan numbers for the basic block. We also found that the optimized code affected to program execution time, and contributed to improve the execution time by about 36%.

AST의 자동적인 구성

오세만,박진기 東國大學校 1990 論文集 Vol.29 No.-

The task of constructing a complier for a particular source language is complex and large. The complexity of compilation process can be reduced if a compiler is designed modularly. So an intermediate from is needed to interface the phases of the compiler. One type of intermediate form is a tree-structured code which is a suitable form for optimization compilers. An AST is a tree-structured intermediate code which does contain the information necessary to next phase of syntax analysis. Most compliers use AST as an intermediate form because of the efficient representation of the source program. The design and obtaining of AST is important in the compiler design process. In this paper, we have implemented the automatic AST generation system. For this work, we designed GDL which is similar to grammar definition in formal language theory and able to describe the structures of AST. And then we implemented the GDLTS that generates the parser constructing the AST automatically according to the specification of GDL. This system can be used as a tool for constructing AST of source program being complied and also used as AST designing tool.

重回歸分析에 의한 勞動者 雇傭豫測에 관한 硏究 : 5人以上 事業體 勤勞者 中心으로 Based on the Employees in the Working Places which have 5 or more full-time Workers

吳世萬,李秉源 동국대학교 경영대학원 1991 經營論叢-東國大學校 經營大學院 Vol.15 No.-

The purpose of this study is to forcast the employment of the employees in the working places which have 5 or more than full-time workers. The main conclusions of this study are summarized as follows: First, the employment is decided on the three factors which are POP(population), GNP/CPI(Gross National Product divide by Consumer's Price Index), and GNP/INC(Gross National Product divide by Income). Also, the flexibilities for each factor are 0.3, 3.7 & 4.6, and GNP is considered the most flexible factor for the employment. Second, it is estimated that 6,268 thousand persons will be employed in 1995, and it is expected that the employment will grow to 2.9% yearly during 6 year 1990∼1995, while the employment has grown up by 7.1% yearly during the last 14 years between 1976∼1989.

차세대 비휘발성 메모리에 사용되는 High-k 절연막의 터널링 특성

오세만,정명호,박군호,김관수,정홍배,이영희,조원주,Oh, Se-Man,Jung, Myung-Ho,Park, Gun-Ho,Kim, Kwan-Su,Chung, Hong-Bay,Lee, Young-Hie,Cho, Won-Ju 한국전기전자재료학회 2009 전기전자재료학회논문지 Vol.22 No.6

The metal-insulator-silicon (MIS) capacitors with $SiO_2$ and high-k dielectrics ($HfO_2$, $Al_2O_3$) were fabricated, and the current-voltage characteristics were investigated. Especially, an effective barrier height between metal gate and dielectric was extracted by using Fowler-Nordheim (FN) plot and Direct Tunneling (DT) plot of quantum mechanical(QM) modeling. The calculated barrier heights of thermal $SiO_2$, ALD $SiO_2$, $HfO_2$ and $Al_2O_3$ are 3.35 eV, 0.6 eV, 1.75 eV, and 2.65 eV, respectively. Therefore, the performance of non-volatile memory devices can be improved by using engineered tunnel barrier which is considered effective barrier height of high-k materials.

병행 객체를 가진 C++ 언어의 설계 및 구현

오세만,고광만 동국대학교 산업기술연구원 1993 산업기술논문집 Vol.5 No.-

C++ 언어는 객체지향 언어의 특성인 클래스(class), 상속성(inheritance), 다형성(polymorphism)등을 지원하고 있지만 병행화를 지원하지 못하고 있다. 그러나 요사이 많은 실제 응용은 병행처리를 요구하고 있고 더욱이 하드웨어의 발달로 인하여 실질적인 다중 처리기(multiprocessor)가 등장함에 따라 병행화는 중요한 문제가 되었다. 따라서 기존의 많은 언어들에 병행화 구문을 추가하여 병행화를 지원하는 언어 확장 방법이 연구되고 있다. 본 논문에서는 객체지향 프로그래밍 언어인 C++ 언어에서 병행화를 지원하기 위해 C++ 언어의 구문에 객체의 멤버 함수가 병행 수행 가능하도록 병행화 구분을 추가하였으며 병행 C++ 프로그램을 C 프로그램으로 번역하는 번역기(translator)를 구현하였다. 번역기는 C++ 프로그램을 C 프로그램으로 바꾸는 기존의 번역기를 수정하여 구현하였다. C++ 언어는 객체지향 특성을 갖고 있기 때문에 그 특성을 유지하면서 병행화를 추구하는 일은 아주 제한적일 수 밖에 없다. 따라서 본 논문에서도 아주 제한된 병행화 구문을 추가하였으며 그 의미를 실제로 구현하였다. To support the concurrency in the object-oriented programming language, it has been studied language extension methods which combine object-oriented programming facilities with concurrent paradigms. Although the C++ programming language has object-oriented language properties such as class, inheritance, polymorphism but it does not provide concurrent programming facilities. In this work, we add the restricted language features which enable the concurrent programming in the C++ language. We also implement a translator which translates concurrent C++ programs into C programs using UNIX system call functions.

C++클래스 프로그래밍 지원 도구

오세만,연주흠 東國大學校 1992 東國論叢 Vol.31 No.-

The C++ language is object-oriented programming language which is derived from C language. Although C++ language is based on conventional programming language, it has few drawbacks in use. Particularly, the class programming which enables the reuse of the program is very hard without a supporting tool. When we program the software package using C++ ckasses, we need an information about the relating classes. To accomplish this, we have implemented a system which aids the C++ class programming. The main works of this system are that information about classes in acquired automatically and programmed classes can be added to the class library with very little effort. The system extracts information form classes by parsing the C++ source code and manages class library based on class inheritance hierarchy. And then this information about classes and the class source code are provided when the class library is browsed. So we can do the C++ class programming easily by using the system.

의료보험 민원창구 대기 시스템 시뮬레이션에 관한 연구

오세만,장태무,조성제 동국대학교 경영대학원 1987 經營論叢-東國大學校 經營大學院 Vol.12 No.-

A queuing theory is the theory for the phenomena which is waiting for a particular service. It occurs at medical insurance and is serious problem. So, it is important to keep an optimum queuing system considering the waiting time of people and idle time of servers. This paper is aimed at producing the data to determine optimal queuing system for predicting the system status of medical insurance at a certain time, average waiting time, average service time, server's idle time, etc. and queuing simulation model, utilizing stochastic process is developed in this thesis to solve the problem. Pseudo random number is generated by additive congruential method to make out the number of customer arrivals and to measure the service time, a frequency test is performed to gain the credibility of the random numbers.

대면적 그라핀 sheet 형성 방법에 관한 연구

오세만,정종완,조원주 한국진공학회 2009 한국진공학회 학술발표회초록집 Vol.36 No.-

한국의 휘발유 수요예측에 관한 연구 : A Study on the Forecasting of Gasoline Demand in Korea

오세만,홍철선 동국대학교 경영대학원 1986 經營論叢-東國大學校 經營大學院 Vol.11 No.-

The purposes of this study are developing the demand function and forecasting the demand for gasoline which mostly used in motor fuel. The main results of this study are summarizes as follows. Firstly, the gasoline demand is made by the function of income, price and lagged variable. And its elasticities are 0.9 for income, 0.6 for price and 0.5 for lagged variable. Secondly, the gasoline demand in 1991 is estimated 14161 thousand Bb1. This represents that the gasoline demand will grow rapildly by 10.3% yearly during the 5 years between 1987-1991, while the gasoline demand grew by 6.3% yearly during the last 20 years between 1966-1985.