분산시스템 구성에 관한 연구

이연식,박기홍 群山大學校自然科學硏究所 1987 自然科學硏究 Vol.2 No.-

Recently, distributed system has become the main issue in data processing system. And many researchers has supposed and presented the result of their studies. In this paper, we divided the function of distributed system into three parts-information processing, database processing and network processing. And, we supposed the configurations of each functions by analysis of their structures and characteristics.

女性 衣服 購買行動에 관한 考察 : 진주시내 거주 20대중반~30대초반을 중심으로

이연희,윤영애,강윤정 진주여자전문대학 1993 論文集 Vol.16 No.-

The market of ready-made to wear for woman in Korea has arrived at the maturation stage of 1990s through the introduction one of 1970s and the development one of 1980s. Nowadays, the ratio of brand numbers orienting the age from midtwenties to early-thirties is relatively higher than those orienting other ages at the women's fashion market. Accordingly the result of this study executed by the consumer research on clothes purchasing behavior according to these ages is as follows : Fitst, the average cost of a year in clothes purchasing was about seven hundred and forty thousand won. Second, there was no correlation between the expenditure cost of clothes, individual fashion sense and color preferences. Third, the display of fashion brand shop could increase the consumer's purchasing needs as well as the amount of their consumption Fourth, as the sale-off period is an opportunity to make the llatent consumer into a real one, the induced strategy and the offering of various service to the consumers for this period become a moment to raise the ratio of sale afterwards. Fifth, as there was a close correlation between the amount of expenditure in clothes cost and the purchasing shop of clothes, the sate promothin strategy is necessary to the group not using high fashion brand. Sixth, as there was a close correlation betwwen the payment method of clothes cost and the level of expenditure amounts, the condition of various payment method or consumer's benefit will be prepared. Seventh, it would be prepared the environment for the consumer to purchase in a good condition, a diverse distribution system, such as the establishment of department store and making that of multi-shop etc.

능동 규칙 시스템의 구성요소 설계

이연식,김광종 群山大學校 情報通信技術硏究所 1999 情報通信技術硏究論文集 Vol.3 No.-

Conventional database systems are passive, but recent trends in database technology have focused on extending conventional database systems to enhance their functionality and to accommodate novel and more advanced applications. One important enhancement is transforming database systems to be active. Active database system performs certain operations automatically in response to certain events occurring or certain conditions being satisfied. Active rule system is the most important component in an active database system. Mainly, the active rule system have several elements of event detector, condition evaluator, action executor and rule manager, etc. In this paper, we propose the design of components of active rule system which can support the active capabilities and review and evaluate the most prominent research projects in active database systems. And also, we describe the guideline for implementation of rule systems to be supported the various concepts of rules and the efficient rule processing for active database systems.

NACK 폭주 억제를 이용한 SRM 성능 개선

李演洙,金泰勳,朴惠蓮,李基鉉 明知大學校 産業技術硏究所 2003 産業技術硏究所論文集 Vol.22 No.-

In this paper, we deal with the Negative Acknowledgement(NACK)-Implosion problem that arises in the multicasting environment, and present a scheme to cope with this problem, the modified version of the Scalable Reliable Multicast(SRM) protocol, called SRM-K. This motivates this work in which the NACK message are generated depending on the congestion level inside the network. The occurrence of congestion is determined by estimating the round trip time (RTT) for each message. As an indication of the congestion level, we introduce a counter in each node, whose value K in dynamically adapted to the change of the network situation, namely increases when the congestion builds up and decreases otherwise. The proposed SRM-K scheme is evaluated by performing the simulation, showing that it outperforms the SRM, in particular, in the scenario when the network situation dynamically varies.

발 형태변화에 의해 개발된 기능화에 관한 고찰

이연희 진주여자전문대학 1997 論文集 Vol.20 No.-

The early concern about shoes market which the high preference phenomenon of 「SAS」 brand has brought, has taken an opportunity to come into contact with BMW'S of a relative systematic domestic brand in the process of research and collection of materials concerned to functionalization. Furthermore the basic concept of the brand and the structure, function and effect of the product have become the direct motivation in this study. As the fact known to everybody, shoes has become the valuable research field in the aspect of having a great influence to the health of the human body as well as being an element of clothing. So the concern about functionalization and the degree of utilization according to this are increased gradually in the young age class as well as middle or old age ones. Especially women's worng wearing habits bring about a kind of 'modern disease' which rouse up a serious deformity of feet. To protect feet from damage caused by shoes and to maintain a healthy life: First, the proper understanding to the function and its role of feet in human body is needed. Second, shoes should be considered in the aspect of maintaining human-body health rather than that of its fashion. Third, with prior knowledge to each characteristics and function in the various kind of functionalization, and with the wisdom of suitable and more effective shoe selection to each human, he/she would live a healthy life.

완도납석과 TEOS로부터 β- Sialon 세라믹스의 제조

이홍림,손연하 연세대학교 산업기술연구소 1990 논문집 Vol.22 No.2

β-sialon powder was prepared from Wando pyrophyllite by the carbothermal reduction and nitridation at 1350℃ for 10h in N₂atmosphere. Si component which was derived from TEOS was added to Wando pyrophyllite in order to control Z value. Two kinds of method were applied for synthesis of β-sialon, one was to add amorphous silica, which was derived from TEOS, to Wando pyrophyllite and TEOS(process A), the other was started from the mixture of Wando pyrophyllite and TEOS(process B). 8 wt% Y ₂O ₃was added to the synthesized β-sialon powders as a sintering aid, and the mixed powders were hot-pressed at 1750℃ for 120 min in N₂atmosphere under 30MPa. The obtained maximum values of M.O.R., hardness and ?? were 667MPa, 16GPa and ??, respectively, and they are the values obtained from β-Sialon ceramics with 0.5 of Z value prepared by process A.

『기술·가정』교과 운영에 대한 교사의 인식과 요구

이연숙,조재순,곽노선 한국 가정과 교육 학회 2002 한국가정과교육학회지 Vol.14 No.2

The goal of the study is to find the necessary measures to facilitate a desirable Technology and Home Economics curriculum by reflecting the perception and needs of the teachers from the perspective of the curriculum content, professionalism of the teacher, realistic operations of the school and administration of the school system. The results obtained from the research are as follows: 1) The background knowledge and characteristics of the two curriculums are different, and in addition there is a negative perception due to the fact that it is hard to facilitate a class with just one teacher. 2) The issues that were most serious to teachers were professionalism of the teacher, qualification of the teachers, and teaching method. Also the teachers lacked in confidence in teaching and the curriculum itself. 3) In regards to qualifications of the teacher, the teachers requested that teachers should have single qualification in 'Technology(or Home Economic)' or dual qualifications in both 'Technology' and 'Home Economics'. As for teaching methodology responded that from the teacher and student perspective the teaching should be divided whereas from the school's perspective the responsibility should be put on a single teacher. 4) Teachers responded that from the perspective of the teacher, parent or student Technology and home Economics should be separated into two subjects. Key Words : curriculum implementation, technology and home economics, subject integration, teachers, principals, educational specialists.

건축의 이미지를 응용한 구두와 핸드백 디자인 연구

이연희,차은진 진주여자전문대학 1996 論文集 Vol.19 No.-

Body ornaments have been already used even before the creation of clothings and changed variously as clothings have been developed. Nowadays, with introduction of art costumes, many objects which can exits as independent objects like three-demensional sculptures have been tried. Thus, the study as a new ornamental expression the shoe and handbag, because they become one of the new formative expressive tools as now they are used as frequently as clothes for ornamentation. And it is attempted not only to express the shoes and handbags based on the recreated traditional images applying sculptures by Kim Su-gem, who shows the beauty of Korean architectures to the world by introducing the space concept and formative concep native to Korea to his architectures and make them a sort of scultures with three dimensions but also to suggest various expressive mean for the commercial ornaments. The results of this study are as follows: First, a fuzzy bag and an interchangeable bag, a new kind of bag, can be suggested by applying to the handbags the space concept felt from Kim, Su-gem's architectures, and ornaments can be manufactured with three-dimensional effects as in sculptures. Second, a variety of expressive possibility for the commercial ornamentys can be suggested on the basis of formativeness using leather sources which are both popular and practical. Thrid, the application of traditionally recreated architectures to ordinary ornaments provides an opportunity to recognize our own merits anew. Four, the approach to shoes and handbag using architectural concepts enables to extend the expressive range in design. As mentioned before, he ornaments as a form of formative art can have infinite possibility for creation depending on the will of worker and the commercially peactical ornaments can be unique or characteristic ones depending on the expressive methods. What we should not fail to point out is we who have to maker our effort to have the people recognize the merits of our own beauties and at the same time to show the Korean beauty to the world by recreating our traditional images in terms of modem fashions.

2계통 냉각에 의한 스파크 점화기관의 열효율 향상에 관한 연구

李成烈,鄭然鍾 成均館大學校 科學技術硏究所 1987 論文集 Vol.38 No.2

The feasibility of reducing knock and thereby achieve higher thermal efficiency in a spark ignition engine has been studied by controlling cylinder head and cylinder block coolant temperatures independently, with the aim of reducing the temperature of unburned portion of mixture during flame propagation, while preventing adverse effect on the engine performance. The study was performed using a 0.667 liter O.H.V. water cooled engine equipped with a dual cooling system. In a fundamental study at the base compression ratio of 4.5 : 1, was found that when the cylinder head coolant temperature was lowered while maintaining the cylinder block coolant temperature at 80℃, engine output was increased significantly, because of considerable knock reduction without increase in friction loss. These results indicated a great potentiality of the dual cooling system for raising compression ratio. It was found that the increased engine output and thermal efficiency caused by the raised compression ratio at the coolant temperature for both circuit of 80℃ by lowering the cylinder head coolant temperature.

객체지향 데어터베이스 시스템에서 능동규칙 설계를 위한 메소드의 매개변수 이용

이연식,배석찬,홍석기 群山大學校 1996 論文集 Vol.23 No.-

The methods, class components of object- oriented database, regard as the chaining events that are able to access the states of object directly and invoke other methods. And, because these methods are composed of codes or procedures, it describe the rules which are used by means of the response of events in active database easily. In this paper, we propose and implement the method that designs the efficient methods of classes using various parameter passing mechanisms in active rule design. This proposed method describes the characteristics and activating region of rules precisely and manages those efficiently. And also, using this method, it can be easily understand the changes of semantics that occur on account of insertion or deletion of rules.