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침지식 MBR을 이용한 유입수의 COD fraction에 따른 막오염 특성 연구
이상정,주재영,배윤선,정인호,이해군,정창화,박철휘 대한상하수도학회 2011 상하수도학회지 Vol.25 No.5
Submerged membrane bio-reactor (SMBR) has several advantages such as high MLSS, long SRT, and low F/M ratio at wastewater treatment. So, this has widely applied over the world and many studies have been conducted. However, membrane fouling remains an inevitable problem. This study was investigated using bench-scale SMBR with three poeration modes. Raw waters were prepared by addition of starch, acetic and fibric acid to recovery water of zeolite. The efficiency of nitrification and COD were very stable as about 95% and 80%, respectively. And critical flux was 128.8L/m2/hr. The result of biodegradability test was following values at the each mode : Ss+Xs/C_T=81.7%, 35.1% and 45.3%, X_I+S_I/C_T=18.3%, 64.9% and 54.7%. When particulate matters such as XI and XS in influent are increased, membrane fouling will take place more and more. A relative ratio of filtration resistance to the fouling occurred by the cake layer was increased when increased the portion of XI and polysaccharide. It was thought that the formation of cake layer was promoted due to bond between XI and vicid material s generated from the polysaccharide.
고급 마이크로프로그래밍 언어를 사용한 마이크로코드 자동 생성시스템의 설계
이상정 순천향대학교 1989 논문집 Vol.12 No.4
This paper proposes a retargetable microcode generation system which automatically generates the microcode of vairous target machines from MDIL(Machine Dependent Intermediate Language) of HLML-C(High Level Microprogramming Language C). For each target machine, translation-information process is made up of function list so as to describe such a machine efficiently. From this information target machine's microcode is generated by extending MDIL. This proposed system is implemented with C language and YACC on VAX-11/750(UNIX 4.3 BSD). The validity of the proposed system is verified by simulating the generated microcode on the target machine.
VLIW 아키텍처를 위한 효율적인 메모리 액새스 성능평가 기법
이상정 순천향대학교 1992 논문집 Vol.15 No.3
This paper proposes an effective memory access evaluation scheme for VLIW architectures, the instructions of instruction level parallel systems such as VLIW cannot execute in parallel due to memory access conflict even though there are no data dependent relations between them. So, the performance of systems is heavily dependent upon the ability of concurrent access of memory system. To reduce the number of memory access conflict, vector data items are effectively allocation in VLIW architectures which have the structure of memory interleaving. To this efficient allocation the precise memory access evaluation according to the number of banks, skew value and stride is essential. For effective memory access evaluation, this paper proposes a memory access evaluation method by calculating a parallel distributed constant (PDC) which is determined by the number of banks, skew value and stride.
호텔 회원제 고객의 공정성 지각이 자발적 고객행동에 미치는 영향
이상정 한국호텔리조트학회 2012 호텔리조트연구 Vol.11 No.3
This research looks into the effects of hotel membership system on customers’ voluntary behaviors and there was a research in deluxe class hotels to comprehend the importance of service and the role and chThe survey was completed by customers who were actually staying at the hotels. The purpose of this research was to recognize the reality of food and beverage department system and to look into how the customers’ satisfaction for food and beverage department affects the choices of hotels in the future. From the results of this research, the purpose was to expand the number of permanent customers and to increase the demand curve. However, since this research was based only upon seven hotels, generalization from this research can cause problems in accuracy. Therefore, in the future, the research should be based on more hotels in expanded area in Korea.aracteristics of hotels.
멀티미디어 저작도구를 이용한 상호작용적 코스웨어 설계 및 구현
서재선,이상정 순천향대학교 부설 산업기술연구소 1998 순천향 산업기술연구소논문집 Vol.4 No.1
The purpose of computer education in elementary school is to improve learning process by self-education with various educational function of a computer. The CAI programs which interact with students and provide them with multimedia resources accomplish the best learning effect. In this paper, the chapter of 'the structure of plants' in fifth grade of elementary curriculum is analyzed. And the CAI courseware, which has the desirable interactive processing with the multimedia data such as graphics, animations and sound, is developed. As a result of applying the program to students, it improves their learning effect.