개방대학 전문대학원 발전방향에 관한 연구 : 학위 제도를 중심으로

양재면,백형찬,문종만,이찬양 서울산업대학교 산업대학원 1992 大學院論文集 Vol.1 No.1

일 自動車工場의 粉塵濃度 分布 및 對策에 관한 調査 硏究

이영섭,박종근,김용철 서울産業大學校 産業大學院 1997 大學院論文集 Vol.5 No.-

우리 나라는 유해한 작업환경으로 인하여 직업병이 발생되고 있는 데도 불구하고, 아직도 직업병에 대한 정확한 원인 규명 및 대책 제시가 미흡한 실정이다. 특히 진폐의 경우 많은 연구와 노력이 있었음에도 불구하고 발생 순위에서는 가장 높은 직업병이다. 본 연구에서는 일 자동차 공장의 생산 현장 8개 부서에 대하여 1993년 9월, 1994년 2월, 1994년 8월 등 3회에 걸쳐 공기 중 분진 농도를 측정하고, 적절한 대책을 제시하기 위하여 국소배기장치의 설치 여부 및 그 적정성을 진단, 측정하여 적절한 대책을 강구함으로써 진폐증으로부터 근로자의 건강을 보호하는데 기여하기 위하여 수행하였다. While occupational diseases are caused by harmful working environment, the exact causes and control of occupational diseases are not presented yet in Korea. Especially, pneumoconiosis is the first one in occurrence of occupational diseases in spite of many researches and much efforts. Therefore, this study is conducted to measure the air-borne dust concentrations three times in September 1993, February 1994 and August 1994 and to show the control of dust for 8 departments of a motor vehicle manufacturing factory. In this study the ventilation systems are investigated to be installed appropriate types and the control methods are presented to be contributed to protect workers from pneumoconiosis.

고장력 볼트 접합부의 응력 분포

김성훈,박용걸 서울産業大學校 産業大學院 1997 大學院論文集 Vol.5 No.-

고장력 볼트 축력에 의한 접합부재의 유효단면적 산정과 이에 대한 검증을 위하여 고장력 볼트 이음 시험편에 대해 피로시험을 실시하고 반복하중 재하 후의 마찰면의 형상을 관찰하여 유효마찰 영역을 측정하였으며, 유한 요소법에 의해 수치 해석을 실시하여 내부압축응력의 분포형상을 밝히고 접촉면상에 발생하는 응력 분포영역을 근사화하므로서 마찰면의 형상과 내부 압축응력의 분포영역과의 관계 그리고 유효단면적의 산정 방법을 고찰하였다. Fatigue tests are performed to the high tension bolted joints and inspected to the phase on the friction face. And using the FEM and numerical method, it is analyzed and approximated to the compressive stress distribution and its region. Moreover, it is estimated to the effective area and to the relation the friction area to the effective compressive distribution region.

천연고분자 응집제의 개발

이경원,정병옥 서울産業大學校 産業大學院 1997 大學院論文集 Vol.5 No.-

폐자원인 게껍질을 화학처리하여 키틴을 제조한 후 탈아세틸화하여 키토산(Cs)에 acrylic acid, malic acid를 그라프트공중합시켜 CsAa와 CsMa를 합성하였다. 제조한 Cs, CsAa, CsMa의 구조 확인은 FT-IR, 전자현미경, X-Ray회절분석기로 하였으며, 응집제로서의 가능성을 검토하기 위하여 제지공장 폐수를 대상으로 투입량을 변화시켜 본 결과 투과도, COD, SS의 제거율이 투입량 40ppm에서 Cs, CsAa, CsMa의 순으로 좋게 나타났으며, pH변화를 시켜본 결과 Cs의 투과도, COD, SS의 제거율이 pH 5에서 가장 좋게 나타났다. 키토산의 그라프트공중합체인 CsAa, CsMa는 키토산에 카르복실기가 중합되어 양쪽성을 띠고 있어 투과도, COD 제거율이 pH 전영역에 걸쳐 80% 정도의 비슷한 경향을 나타내며, SS제거율은 90%를 나타내고 있다. 그라프트 공중합체인 CsAa, CsMa가 Cs보다는 월등히 좋은 제거율을 나타냈다. From crab shell, a waste material, chitin was prepared by chemical treatments and, subsequently, deacetylated into chitosan(Cs). CsAa and CsMa were then prepared from a graft copolymerization of chitosan with acrylic acid and malic acid. FT-IR spectroscopy, scanning electron microscopy, and X-ray diffraction were employed for the characterization of Cs, CsAa, and CsMa. To investigate the potent possibility of being used as a flocculant, these coploymerized chitosans were added to a paper mill waste water. When 40ppm of each kind of chitosan was added the removal rate of COD and SS increased in the order of CsMa, CsAa, and Cs, respectively. The permeability and the removal rate of COD and SS of Cs had the highest value at pH5. On the other hand CsAa and CsMa show the amphiphilicity due to the presence of carboxyl groups, which results in a 80% of permeability and COD removal rate and 90% of SS removal rate throughout the whole pH range. From these facts, it is easily seen that CsAa and CsMa, two kinds of graft-coplymerized chitosan, show far better removal rate compared with Cs.

Typography 敎育을 通한 造形原理의 認知 過程 : Typography 敎育의 事例硏究를 中心으로 Focus on case study through the typography-education

金京滿 서울産業大學校 産業大學院 1997 大學院論文集 Vol.5 No.-

Typography는 情報傳達을 위한 시각전달 媒體의 根幹으로 디자인을 연구하는 각 대학은 시각언어의 기본을 이해하는 요소로서 커리큘럼 내에 우선 순위로 포함시키고 있다. 본 연구는 타이포그라피의 활용영역을 확대하여 타이포그라피의 기본 기능인 情報傳達의 언어적 기능뿐만 아니라 형태의 美的 구성을 통한 시각적 造型原理를 익히는 소재로서 연구되었다. 연구의 대상은 디자인 대학의 新入生으로서 視覺言語를 처음 접하는 학생을 대상으로 하였으며 다음과 같은 결론을 導出시킬 수 있었다. 타이포그라피 교육은 造形原理의 綜合的 사고를 요구하는 교육으로서 타이포그라피 교육을 통해서 시각디자인의 기초 지식을 習得함은 물론 이러한 교육역량은 디자인의 원리를 이해하는 시각언어 교육의 根本으로서 이해되어야 함을 알 수 있었다. 즉, 타이포그라피의 構成은 낱말에서 문장(글자의 MASS化를 意味)에 이르기까지 다양한 조형요소로 형성되어 있어 美的 構成原理를 이해하는 중요한 視覺要素가 될 수 있었으며, 敎育後 理解力 평가 결과 美的 구성원리의 인지에 많은 영향이 있었음을 알 수 있었다. 따라서 디자인 교육에 있어 타이포그라피는 造形原理的 접근에서 시작되어야 하며 다양한 造形原理를 이해할 수 있는 學習 프로그램이 必要하였다 As typography is basic visual communication medium to furnish information, every college which studies on design includes typography as a priority curriculum in order to understand the foundation of visual language. This study is for enlarging the utility sphere of typography not only as a language function to give information but also as a medium of visual formation principles to learn through the aesthetic constructive principles. And this study made the design college freshmen an object who first meet with visual language and the following is a conclusion. Typography education demands the synthetic idea of formation principles ; therefore students should get the fundamental knowledge of visual communication design through the typography education which is the source of design principle. In other words, formation of typography is a important visual factors to understand the aesthetic formation principles because of its various formation including sentences from words. Moreover, When the education was completed; it was turned out that typography education had a great effect on recognition of formation principle by evaluating the students' creativities Consequently, typography education should start with the formation principle, which needs new education programs to understand the various formation principles.

設計와 在庫管理System의 連繫Database에 관한 연구

남궁재관,김덕중 서울産業大學校 産業大學院 1997 大學院論文集 Vol.5 No.-

The stock-control is an important factor in reducing cost on the industrial spot. It is surely necessary that some part is keeping with fit and frequently using parts are preserved with proper quantities for sending out goods. But many stock goods are difficult to control. Particularly it is closely related to employ finance of company smoothly. The suitable stock quantities are surely necessary for producing goods. But it is harmful for stock quantities to be accumulated too muck for operating the company There are various kinds to solve this problem. But first of all, We can think out the standardization of productions After that we can have control with database given peculiar codes to standardized products. If it is a designed plan using standardized products from the design of products, We can easily inquire out the sorts and numbers if articles according to article code gained from designed plans and easily control products. Also if the designing plan is made by automatic planning program, we can conveniently produce the sorts and numbers of required articles by automatic planning program. If the database, the files and stock articles are employed together with automatic planning program, We can draw up not only the designing plans but also the detailed lists of required and the total stock. Therefore it can be widen much more the utility scope of program as well as the bushiness efficiency.

변형된 MESI를 이용한 캐쉬 일관성 프로토콜

최인석,조병호,심원 서울産業大學校 産業大學院 1997 大學院論文集 Vol.5 No.-

This paper suggests a cache coherence protocol which improves the efficiency of MESI protocol. The suggested cache coherence protocol maintains 6 types of cache states and ID area. The cache states are divided into 3 valid (exclusive, modified, modified-shared, shared) and 2 invalid (invalid, invalid-by-other) states. ID area holds the identification of the processor module with valid block. We can decrease broadcasting and snooping by the suggested protocol. In addition to it, we can shorten the responce time through cache-to-cache communication. According to simulation results, We get around 2% efficiency improvement compared with MMESSII protocol which is a improved MESI protocol as the number of processors are increasing.

드릴 형상에 따른 가공성 평가에 관한 연구

정석주,이영식 서울산업대학교 산업대학원 1999 大學院論文集 Vol.6 No.-

The optimal drill helix angle, point angle, and cutting conditions are recommended in the study so as to maximize the drilling performance by investigating the experimental reaults concerning with concerning with the cutting resistance, wear of drill point, the state of chip formation, and geometry of projected burr at hole exit, which are examined under the conditions of various helix angles, drill point angles of twist drill, cutting speeds, and feeds in operional parameters. The wear of the drill point exhibits the smallest one when the helix angle is 30˚and drill point angle is 118˚or 140˚. In the easiness of chip escape, the ideal helical type of chip is producted when a helix angle is 30˚and feed is set between 0.1 and 0.15mm/rev. The height of projected burr at the button of machined hole increases when the rill point angle and helix angle becomes large.

분산처리를 이용한 웹 에이전트

곽중선,남윤혁,정화자 서울산업대학교 산업대학원 1999 大學院論文集 Vol.6 No.-

In a search engine, there are several problems what are maintenance of database, the scalability of system, a limitation of web-area where a search engine can query. A meta search engine solves that problem of existed search engine. However, a meta search engine establishing multiple connections to remote search engines has the potential to saturate the network and increase the load on the server running the search agent because of rising of search operation. In order to resolve these issues, we propose a meta search engine for client-oriented distributed processing using the high efficient machine of user who request the query to a meta search engine.

키틴계 담체를 이용한 효율적인 효소고정화법 개발

김용범,강수정,한상문 서울산업대학교 산업대학원 1999 大學院論文集 Vol.6 No.-

본 연구에서는 키토산을 담체로하고 5가지 다른 방법에 의해 단백질 가수분해 효소인 trypsin을 선정하여 효율적인 효소고정화법을 개발하고자하였다. 비교한 효소고정화 방법으로, 먼저 가교제의 변화로서 glutaraldehyde와 hexamethylenediisocyanate를 비교였고, 다음으로 프로세스의 변화로서 ⅰ)chitosan bead에 효소를 흡착한 후 glutaraldehyde로 가교하는 방법, ⅱ)chitosan bead에 효소를 흡착한 후 hexamethylenediisocyanate로 가교하는 방법, ⅲ)chitosan과 효소를 혼합하여 bead화하고 glutaraldehyde로 가교하는 방법, ⅳ)chitosan bead를 glutaraldehyde로 1차 가교 하고 효소를 흡착한 후 다시 glutaraldehyde로 2차 가교하는 방법, ⅴ)chitosan bead에 효소 흡착 후 glutaraldehyde로 가교 처리하여 NaOH로 처리하는 방법등으로 비교하여 ⅲ>ⅴ>ⅳ>ⅰ>ⅱ 의 순으로 아미노산 생성효율을 확인하므로써 보다 효율 높은 효소고정화법을 모색하였다. 가교제의 종류에서는 glutaraldehyde가 더 유리하였고, 고정화 가교방법에서는 chitosan과 효소를 미리 혼합하여 bead화한 다음 가교한 것이 기타 다른 방법들에 비해서 고정화 효율이 가장 우수함을 확인하였다. More effective methods for immobilization of enzymes(trypsin) were examined with chitosan beads, through comparison of several different immobilization methods. The methods applied in this experiment are: Firstly with different crosslinking agents : glutaraldehyde and hexamethylenediisocyanate. Secondly with different processes: ⅰ) Adsorption of enzyme on the beads, then crosslinking with glutaraldehyde. ⅱ) Adsorption of enzyme on the beads, then crosslinking with hexamethylenediisocyanate. ⅲ) Mixing chitosan with enzyme, then beads formation followed by crosslinking with glutaraldehyde ⅳ) Treatment with glutaraldehyde, then enzyme adsorption on the beads followed by crosslinking with glutaraldehyde. ⅴ) Adsorption of enzyme on the beads and then crosslinking with glutaraldehyde followed by treatment with 0.01N-NaOH aq. solution The order of superiority is ⅲ>ⅴ>ⅳ>ⅱ>ⅰ described above. The efficiencies of hydrolysis of milk protein by the immobilized enzymes were estimated by spectrophotometry of amino acids produced through hydrolysis.