한강상수원에서 질소·인의 유입 및 분포 특성에 관한 연구

박창민 건국대학교 산업대학원 2001 論文集 Vol.13 No.-

Nitrogen and phosphorus are important nutrients necessary for life, the supply of which is potentially limiting to biological activity within stream ecosystems. Their uptake, transformation and release are influenced by a number of abiotic and biotic processes. This study was performed to investigate of the run-off characteristics of nitrogen and phosphorus in the Han river basin and the distribution pattern in the water body from January 1999 to December 1999. The mean concentration of T-N and T-P were 2.314 ㎎/L, 0.058 ㎎/L in the Han river, which T-N and T-P were measured in the six tributary streams of Han river on six times a day in dry season. The phosphorus loading from point sources were relitively higher than the nitrogen. Because the population density in its water shed is high, most of phosphorus can be assumed to come, as higher level, from domestic sewage. The concentration of nitrogen in the Han river showed relatively fixed variation, whereas, T-P increased drasticaly up to 2.7 folds in stormy season. Which implies that storm runoff from nonpoint sources tend to have high phosphorus concentration. The correlation coefficients between T-P and Paldang dam outflow were showed high significant. But it was not apparent whether the concentrations of T-N and T-P affected the growth of phytoplankton.

노인주거의 부엌공간 개선방안

김지순 건국대학교 산업대학원 2001 論文集 Vol.13 No.-

As the aged population is growing, the aging society is coming up and the changes of consciousness caused by economical development and social evolution are affecting the lifestyles of individuals and the society. Responding to th phenomenon, it is required to suggest systematically a space plan that is suitable for the activities of aged people. The objectives of this research is to suggest a plan to improve kitchen areas in response to the physical and psychological demands of aged people by reviewing literatures, analyzing theories about the kitchen areas of aged people, sorting out guidelines for each factor resulted from the investigation of actual conditions and questionnaire surveys, and studying plans to improve kitchens. The research methodologies are analyzing the kitchen areas of aged people through literature reviews, investigation of actual conditions of the kitchen areas in residences of aged people and questionnaire surveys referencing domestic and foreign master and doctoral theses, magazines and publications of public institutions, compiling the facts found through the investigation of actual conditions, and carrying out questionnaire surveys on the activity areas and demands, which cannot be identified through the investigation of actual conditions. A basic form of kitchens suitable for the characteristics of aged people and the areas of activities in kitchens are suggested systematically based on the results of literature analysis, and a recent book deals with researches on the floor and elevation for physically handicapped aged people as well as ordinary adults, which demonstrates the possibility of those researches to be extended diversely and actively. In addition, the factors to evaluate kitchen areas for aged people are reflected in th investigation of actual conditions and questionnaire surveys have been carried out for the questions concerning each factor to deliberate the improvement of kitchens. The survey outcomes are about, first, the general aspects of kitchen works, second, kitchen facilities, third, kitchen furniture and working tables, fourth, convenience and safety and lastly, kitchen environment and sanitation. These factors are selected according to a design guideline based on the characteristics of aged people, considering convenience of activities, physiological maintenance, perceptual maintenance and social easiness. These factors should be classified to facilitate examinations, be standardized and be applied to kitchen areas in residences of aged people. Because, in one's old age, the ability for daily life declines and the housework is felt to be heavy, it is required to commercialize and mechanize facility services for rationalizing and simplifying. In addition, the social consciousness for aged people should be changed and more specific measures should be prepared for them. The behaviors of aged people in the kitchens, where the accomplishment rate of labor is high within the residences of aged people, should be studied carefully and the kitchen should be designed to complement their physical handicaps and to provide safe environment without any obstacles.

공개키 認證方法을 適用한 學校情報시스템 데이터 傳送體制 設計에 관한 硏究

李斗榮 건국대학교 산업대학원 2001 論文集 Vol.13 No.-

Internet has been increasingly applied not only to a corporation and government but also to many aspects of everyday life. Recently, each department of the Government actively unfolds an enterprise which strengthens civil affairs administration as a part of an attempt to be a government for citizen. Each department also promotes efficiency of business management by applying information technology to administration. As a part of this trend, in August of 1996, Ministry of Education & Human Resources Development(MOE) made "enforcement plan for informationization of education" which included the development of "School information Management System(SIMS)" for computerization of education administration and the diffusion of SIMS in elementary, middle, and high schools throughout the whole nation. In order to increase the applicability of data that have been accumulated in SIMS and review the efficiency in college entrance administration, School Activities Records(SAR) have been used in a form of diskette or CO-ROM in cases that students enter an advanced school, move out to another school or transfer from another school, and go to college. Because SAR are important data, they are classified as the highest grade with regard to data security level. The data communication system of SAR had been managed by people, mainly because an internet-related environment was not set up completely. In March of 2001, all, elementary, middle, and high schools were connected to the internet, which made it possible to manage the data of SAR through on-line. This thesis intended to manage the data communication system of SAR through on-line by employing data encryption and authentication structure of Public Key Infrastructure(PKI). To accomplish this objective, this study adapted the standard PKI technology that the nation authorized, and designed the data communication system of SAR in a way to address digital signature for authentication, integrity, and non-repudiation of a data sende. In order to issue and acquire a user certificate of a school for digital signature, National Computerization Agency(NCA) was appointed as a certificate authority. Korea Education & Research Information service(KERIS) was designated as a registration authority(RA) and each of the 16 metropolitan & regional offices of education was appointed as a branched registration authority(BRA). Because of its practicability and applicability, a central data accumulation and delivery system was selected and designed in detail as the data communication system of SAR. KERIS, a government-funded organization for education information services, played a significant role as a central center in which all SAR were gathered and processed. The identification procedure of SAR was simplified from 3 steps to 2 steps. Time and procedure were also simplified by changing off-line management of data communication system into on-line management. This study established the data collection and communication system of SAR in on-line and simplified its related procedure, which led to reduce the administration-related work load of high school, each of the 16 metropolitan & regional offices of education, KERIS as a central center, and college. This study also presented a data communication system which is suitable for authentication and security concerns. This system can be utilized for accepting college entrance application forms and issuing all sorts of certifications through on-line. This study is expected to be a basis to fortify the services of education administration for citizen and to help people recognize PKI and use digital signature.

가상현실형 공장관리 시스템의 효과 분석 : VRML을 이용한 생산정보시스템 구축을 중심으로

김정렬 건국대학교 산업대학원 2001 論文集 Vol.13 No.-

This paper investigates possible application of virtual reality technology into manufacturing and production system, strongly advocates the implementation of the production information system equipped with the cutting-edge virtual reality technology, and specifies the detailed procedures and methods to reach the goal. This study argues that the virtual reality technology could cause the shift from traditional static linear production process to novel dynamic interactive production process, which helps to lift temporal and spatial restraints in manufacturing systems in the company by taking an example of the computer manufacturing company, for instance S computer, in Korea, Furthermore, a manager would make more comprehensive and acute decisions more quickly, based on synthetic production information gathered from the interactive Virtual Reality(VR) system. Thus, even though the current hardware in the markets remains expensive and a few technical issues should need to resolve at the present moments, the equipment of virtual reality system in production procedures could make the firm more consumer oriented and bring more profits by creating real-time digital markets in the near future.

알루미늄 5052-H34 합금 적층재의 방탄성능과 파괴모드에 관한 연구

朴泳義 건국대학교 산업대학원 2001 論文集 Vol.13 No.-

In this paper, Al 5052-H34 alloy laminates and anodized Al 5052-H34 alloy laminates is tested to investigate the fracture behaviors(penetration modes) and resistance of ballistic impact. Resistance to penetration is determined by protection ballistic limit(V_50), a statical velocity with 50% probability for complete penetration, test method. Fracture behaviors and ballistic tolerance, described by penetration modes, are observed resulting from V_50 test and Projectile Through Plates (PTP) test respectively. PTP tests were conducted with 0° obliquity at room temperature using 5.56㎜ ball projectile. V50 tests with 0° obliquity at room temperature were conducted with projectiles that were able to achieve near or complete penetration during PTP tests. Surface Hardness tests were conducted using a micro vickers hardness tester. Surface Hardness, resistance to penetration, and penetration modes of Al 5052-H34 alloy laminates compared to those of anodized Al 5052-H34 alloy laminates. As a result of Anodized Al 5052-H34 alloy laminates, it showed a superior protection ballistic limit and higher surface hardness than that of Al 5052-H34 alloy laminates.

이온검출을 위한 미소전류 측정에 관한 연구

丁一孫 건국대학교 산업대학원 2001 論文集 Vol.13 No.-

The dissolved oxygen meter is the most popular device for the determination of oxygen concentration of water. Therefore, there is urgent need to optimize the performance of dissolved oxygen meter. In this thesis, a theoretical and experimental study was performed to develope a more efficient dissolved oxygen meter. The scientific background and technical history for membrane- covered electrode was studied in the point of polarography. From this study, the electrode materials such as gold, silver and platinum was the most important factor to explain their electrochemical abilities to detect oxygen. As for the gas barrier, most of modern dissolved oxygen electrode used PTFE or FEP as a oxygen permeable membrane. Another material such as PP(polypropylene) was also used, to control a sensitivity of electrode. As for measuring system, most of meter was a digital type. In recent meter, a microprocessor and analog to digital converter was used to measure current and display a result. Moreover, a temperature and pressure compensation was more easily performed by numeric calculation in the aid of pre-stored data.

등산복 쾌적성에 대한 연구

윤준식 건국대학교 산업대학원 2001 論文集 Vol.13 No.-

To assess the comfortableness of climbing wear, this study investigated physiological responses and subjective senses by dividing the enveronmental condition into 2 types, climbing wear into 2 types and subjects into 2 groups. The indicators of physiological responses included clothing temperature by region of the body, average skin temperature, eardrum temperature, temperature and moisture whitin the clothing, the amount of sweating, heart rate, energy metabolism. The indicators of subjective senses included the sence of warmth, the sense of humidity and the sense of comfortableness. This study has the following limitations : First, only representative specimens were selected from diverse functional materials and general materials and tested. Care was taken not make an expansive interpretation of the study results. Second, climbing exercise has no special rules. Therefore, a little more diverse and extensive studies are needed in the future. Third, the state of the artificial climate room might considerably differ from the climate of the general mountainous terrain. Therefore, the laboratory researchmight be more or less different from the research under the actual environment. With these limitations in mind, the climbing wear of general materials and the climbing wear of functional materials were investigated by environmental condition and by group of subjects. As a consequence, the following findings were obtained : (1) Physiological Responses As for the skin temperature by region of the body, the skin temperature of the trunk was higher than that of the limbs. The average clothing temperature showed the temperature distribution of 31.08℃∼33.38℃ and higher than that of skin temperature. The higher temperature/moisture were, the higher this distribution of skin temperature was shown to be. The eardrum temperature was shown to be within the distribution of 36±1℃. It was found that there was not a great difference in int under the different environment because of the ability of the body to regulate its temperature. In the 'A' environment(18℃, 40%), it was found that there was a significant difference in temperature/moisture wihtin clothing between the types of climbing wear at the significance level of p <0.001. In the 'B' environment, it was found that there was not a statistically significant difference. This indicates that there was not a great difference between the climbing wear of general materials and the climbing wear of functional materials in the hot and humid environment. As for the amount of sweating by reginon of the body, the sweating amount of the trunk was higher than that of the limbs. The sweating amount of the chest and the back was shown to be highest. And the difference between the types of climbing wear showed the same tendency as the climate within climbing wear in both the 'A' environment and the 'B' environment. Therefore, they had the close relationship with each other. The higher the temperature/moisture of the environmental condition became, the higher blood pressure became. Depending on time, blood pressure tended to rise at a time of exercise and fall at a time of resting. The lowest blood pressure belonged to the normal domain, but the highest blood pressure was shown to be high at the range of 1㎜Hg∼10㎜Hg. (2) Subjective Senses It was found that there was not a difference in the sense of warmth between the climbing wear of general materials and the climbing wear of functional in both the 'A' environment(18℃, 40%) and the 'B' environment(25℃, 60%). There was a more or less difference in the sense of humidity and the sense of comfortableness in the 'A' environment condition. But it was found that there was not a difference between climbing wear of general materials and the climbing wear of functional materials in the 'B' environment(25℃, 60%). (3) The Study Results Depending on the Classification of Subjects It was found that there was a difference in the result of physiological reactions by item between the group of climbing specialists(P1) and the group of general people(P2), which indicates that physiological reactions are related to exercise ability at ordinary times. But, in case of the group of climbing specialists(P1), there was not a great difference in the figures of subjective senses between and the 'B' environmental condition. But in case of the group of general people, it was found that there was a more or less difference between the types of wear materials in each environmental condition. It was found that the group of general people was sensitive to changes in wear materials.

서해안 해성점토의 공학적 특성

朴起龍 건국대학교 산업대학원 2001 論文集 Vol.13 No.-

The physical, chemical, and mechanical properties of 2,554 soil specimens sampled in 4 regions including Kyonggi, Chungcheong, Chunbuk and Chunnam Provinces are investigated through the laboratory experiments. Soil characters are identified by comparing the relations between the characteristic coefficients. Soil in Chunnam area contains the clay in the largest amount while in the largest amount in Kyonggi area contains the of silt. As the areas moves from north to south, the clay content increases and the silt content decreases. The reason is due to the difference between the rise and fall of the tide and the different influence of incoming rivers. Pore ratio, natural water content and specific gravity of soil takes the largest values in the Chunnma area, and the tendency to increase as the areas moves from north to south. Most of the areas shows the medium-plasticity inorganic clay located on Casagrand A-Line. Observing that natural water content is higher than liquid limit, ground state in those areas are weak and unstable. There are cases that the values different from their original specific values are encountered due to causes of errors in the measured soil coefficients such as the diversity of soil characteristics, the sampling method of specimen and the difference in the interpretation of the test results. This study has the limitation in failing to sample and test data in an intensive and systematic way. However, enough data collection and analysis lead to minimizing those errors and obtain a little more accurate values.

조형양식의 변천에 따른 디자인 변화에 관한 연구 : 올림픽 포스터를 중심으로 Focused on the Olympic poster

李定姬 건국대학교 산업대학원 2001 論文集 Vol.13 No.-

The design style has diversely changed as the plastic, visual characteristic of a particular society and era up to now since the early 20the century. We can attempt to infer changes in the design value from changes in this design style. The design style of the times has been determined and formed by industrial changes and cultural development and performed a central role in the expression of design. Since the Industrial Revolution, the design style came to prefer the structural, geometrical and functional abstract form as mass production got away from the decorative and come to pursue for the functional form. The development of masscult and fine arts, beginning from the 1960s, emerged as the response of repugnance against functionalism. In the post-industrial society, post-modernism appearing throughout the fields of arts and cultures enabled designer to make a free expression in the field of design. The poster is the visual language reflecting the times and directly influenced by changes in this design style. Among other things, the Olympic poster, performing the role in making its symbolic image widely known to people by condensing the cultural and artistic levels of the nation hosting the Olympics into it, has kept abreast of industrial and cultural development and expressed it by introducing the up-to-date design style and graphic techniques. Posters of the early Olympics were deficient in the picture of the modern Olympic due to the lack of an understanding of the Olympics, the insufficient period of preparation for them and the like. But plastic and abstract posters influenced by the plastic art movement in the early 20th century emerged and came to take on the disposition of the Pure Plasticism preferring the geometrical form of functionalistic modernism since. Mass production and mass consumption came to bring about the development of the industrial society since the Second World War, and as the development of the masscult blurred the boundary between design and arts, the posters taking on a decorative character aimed at appreciation and sale emerged in addition to the functional poster aimed at the transmission of messages. Posters are showing a tendency to change into diverse and individualized design style and to return to humanity as post-modernism arising from a revolt against the uniform design thinking or modernism has come to a forefront. The Olympic posters are attempting to make a new expression of design by introducing up-to-date techniques such as photography, lithography, computer graphic and the like as well as performing a role as the symbolic lace tying the Olympics and arts and making a significant contribution to the design development of design, especially in the fields of logo, pictogram and CI. Therefore, this study sought to investigate changes in design in accordance with the evolution of the design style through Olympic posters and identify the aesthetic sense required by the masses of the times. And future studies will have to probe a new attempt and development of the expressive style of posters that connect society with arts in this diverse and pluralistic era.