논문 : 금속성 응집제와 모노클로라민의 상호작용이 Polyamide계 RO막 성능에 미치는 영향

김경화 ( Kyung Hwa Kim ),홍승관 ( Seung Kwan Hong ),박찬혁 ( Chan Hyuk Park ),윤성로 ( Seong Ro Yoon ),홍성표 ( Seong Pyuo Hong ),이종화 ( Jong Hwa Lee ) 대한상하수도학회 2006 상하수도학회지 Vol.20 No.4

The bench-scale chlorine exposure study was performed to investigate the effect of pretreatment by free chlorine and monochloramine (NH2Cl) on the performance of RO membranes made of polyamide (PA). Feed monochloramination at 2㎎/L did not cause significant productivity loss compared to free chlorine. However, metal coagulants reacted with monochloramine, the PA membrane suffered from a gradual loss of membrane integrity by chlorine oxidation, which was characterized as a decrease in salt rejection. Especially, RO membranes exposed to alum coagulants with monochloramine revealed the salt rejection lower than those exposed to iron coagulants. XPS membrane surface analysis demonstrated that the chlorine uptake on the membrane surface increased and carbon peaks were shifted significantly when exposed to alum coagulants with monochloramine.

후천성 면역 결핍증 환자의 혀에 발생한 거대세포바이러스(CMV : cytomegalovirus) 감염

송노헌,이종호,정필훈,김명진,김수경,남일우,김종원,백세미,홍삼표 大韓顎顔面成形再建外科學會 1998 Maxillofacial Plastic Reconstructive Surgery Vol.20 No.1

객체지향 데이터 모델에 기반한 해양환경 분석에 따른 어장 등급 분류

이재봉,이홍로 한국지리정보학회 2005 한국지리정보학회지 Vol.8 No.1

본 논문은 공간 통계 분석에 기반한 해양오염에 대한 영향 경가를 위해 지리적 환경에 있는 오염원에 대한 지리객체와 지리필프를 규정하고, 해양 환경 영향 평가 시스템을 구현하고자 한다. 해양 영향 평가에 따른 어장의 등급 산출을 위하여 반베리오그램을 통해 공간적 상관관계의 정도를 분석하고, 크리깅 기법을 이용하여 공간자료의 등가분포도를 예측하고자 한다. 이 공간통계분석을 통한 어장의 오염 지역의 등급을 추정하고, 어장이 속한 등급에 따른 면적의 비율을 산출하고자 한다. 그래서 효율적 어장 환경의 판정을 통한 해양 영향 평가를 하는 어장 등급 산출에 기여 할 수 있다. This paper will specify geo-objects and geo-fields of the geo-ecological contamination source and implement the system for evaluating an ocean Environmental contamination based on the spatial statistical analysis. In order to produce the grade of fishery that can evaluate the ocean effect, we will analysis the degree of the spatial correlation by semi-veriogram and predicate the elevation raster of spatial data using ordinary kriging method. This paper is to estimate the grade of fishery contamination region and produce the ratio of the area according to the fishery grade. Therefore, we can contribute to produce fishery grade that evaluates the ocean effect by means of deciding an efficient fishery environment.

表面處理 實驗의 效率化를 위한 實習敎材 開發에 關한 硏究

李鴻魯,李承遠 충남대학교 공업교육연구소 1983 論文集 Vol.6 No.2(A)

In this study, manuals for electroplating experiments during a term are developed on 12 different subjects. The main goal of this study is to develop efficient and systematic experimental manuals in the field of Metal Finishing. Also, this is applicable not only to pre-vocational education in Technical High School but also to the training of technical teachers at C.I.E.

해외 쇼핑몰 이용자의 구매만족에 관한 연구

이제홍,박노경 한국생산성학회 2001 生産性論集 Vol.15 No.3

The number of internet electronic commerce users has increased steadily and EC is now considered not only as the communication tools, but also as the economic activity. But in spite of these global trends, current studies limited to managerial approach are insufficient in the evaluation of EC policies and situations. The purpose of this study are to present satisfaction of customers who will operate foreign internet shopping mall. and to analysis after-purchase behavior on EC satisfaction As a result of making regression analysis, for its satisfaction, the hypotheses on "Shopping Mall Contents", "Information supply", "Convenience of order process", "Economy", "The reliability", "Customer Service were accepted at the p<.0.05 level of significance. for its after purchase behavior, the hypotheses on "Shopping Mall structure", "Convenience of order process", "Economy", "The reliability", etc factors were accepted at the p<0.05 level of significant in 4 factors. In order words, electronic commerce satisfaction became greater when better convenience and economy were provided, the ethics were observed better, more diverse information was supplied and better system support was given. and those who had a higher educational background or better perception of electronic commerce felt more satisfaction, Finally, more usefulness of electronic commerce led to bigger satisfaction after purchase.

스트라이크 浴中 銅電着層의 優先配向에 關한 硏究

李鴻魯 충남대학교 공업교육연구소 1981 論文集 Vol.4 No.2

Copper was electroplated until 100㎛ thickness in the Standard Strike bath at temperature from 35 to 70℃ over the range of current density from 1.5 to 18 A/dm2. Copper deposits had nearly (110) preferred orientations within these experimental conditions. Very rough surfaces with high angle pyramids were formed at low temperatures and low current densities, while smooth surfaces at high temperatures and low current densities. But at high current densities, regardless of temperatures, only smooth surfaces were formed. By increasing temperature of the bath or by increasing the current density of the bath, microthrowing power seemed to be elevated.

객체지향 지리 데이터 모델에 의한 지하수의 오취약성 분석을 위한 관리시스템 구현

이홍로 한국지리정보학회 2003 한국지리정보학회지 Vol.6 No.2

이 논문은 객체지향 데이터 모델을 이용하여 지하수 오염 취약성 평가를 위한 시스템을 설계?구현하는 것이다. 응용 지리영역에서 지형지물을 추출하여 지리-객체로 규정하고, 관정으로부터 추출된 화학적 요소들로부터 지리-필드를 규정한다. 또한 이 지리-객체와 지리-필드 사이의 위상 관계를 보여주기 위해서 토지 이용도와 지하수에 표현된 화학 성분에 등급과 가중치를 부여한다. 지형 클래스, 행정 경계 클래스, 토지 이용 클래스와 관정 클래스는 관정 객체들 사이에 공간 관계성을 가지는 클래스합성계층구조를 이루며, 이 클래스 계층구조는 편리한 오염취약성 평가를 위한 기반이 된다. 이 연구를 통해 구현된 지하수 오염 취약성 평가를 위한 효율적인 관리시스템은 다른 자연환경의 오염 취약성 평가에도 기여할 수 있다. This paper designs and implements the management system that can calibrate the contamination vulnerability of the ground water, using an object oriented data model. Geographic-objects are specified by features extracted form an applicable geographic domain, and geographic-fields are defined by chemical factors extracted from each driven water. To show the topological relationships among the geographic-objects and the geographic-fields, this paper attach the weight and the ratio of the drastic model to chemical factors represented on the land use digital map and the ground water digital map. The geographic feature class, administrative boundary class, land use class and driven water class consist of a class composition hierarchy for evaluating the convenient contamination vulnerability calibration with spatial relationships among the well objects. Therefore, this management system for evaluating the contamination vulnerability can also contribute to the application of other natural environments.

시안化銅 鑛金浴의 分極에 關한 硏究

李鴻魯 충남대학교 공업교육연구소 1983 論文集 Vol.6 No.1

Electrode polarizations were investigated in cyanide copper baths at the temperatures from 20 to 80℃ over the range of current density from 3 to 18 A/dm². Polarizations were increased with rising current densities, bath temperatures, and stirring but their increaments had not so much effects on polarizations as simple acid baths owing to high activation polarizations and hydrogen evolutions on the cathode. Because nucleation rates were very high at high polarizations, new crystals were formed continuously rather than increasing their sizes along the cathode surface or toward the electric field. So, (110) preferred orientations could be formed in cyanide copper baths. Free cyanide concentrations were potent influence on the current flow and the polarization. Limiting current density was increased with rising temperature till 60℃ and a passivity appeared at the anode current density 2A/dm²and the bath temperature 60℃.

옥소 레이저 발진기의 제작 및 출력 특성조사

노홍균,이정오 嶺南大學校附設 基礎科學硏究所 1984 基礎科學硏究 Vol.4 No.-

An optical iodine laser generation system is designed and set up, and the output characteristics for lasant gas ?? is studied. Discharged capacitor of 7.5μF low-inductance is used and Ar-flashlamp made by our laboratory is used as the pumping light source instead of Xe-flashlamp. The output energy is obtained up to 20mJ at Ar-pressure 40torr, iodine pressure 40torr, discharge voltage 17KV for transmittance partial mirror 30%.

객체 지향 데이타베이스 시스템의 질의 및 객체 관리기 인터페이스

이재봉,배석찬,이홍로,이연식 群山大學校 1993 論文集 Vol.20 No.-

객체 지향 데이타 모델을 지원하는 데이타베이스 시스템은 기존의 데이타베이스의 단점을 보완하며, 다양하고 복잡한 실세계의 정보를 처리할 수 있다. 객체 지향 데이타베이스 시스템은 사용자의 접근을 위해 질의 및 객체 관리 인터페이스를 필요로 한다. 본 논문에서는 사용자를 위한 질의 인터페이스와 질의 계획을 수행하기 위한 객체 관리 인터페이스를 설계함으로써 질의 목적을 달성토록 하였다. 설계된 객체 관리 인터페이스는 응용을 위해 "C"언어 함수로 구성하였고, 성능 항상을 위한 확장성을 제공할 수 있도록 설계 하였다. The database system that supports object oriented data model can complements conventional DBMS's drawbacks and processes complex and intensive applications. In object oriented database system, the access and management of all objects are manipulated by object manager. Therefore, a query interface as well as an Object Manager Interface(OMI) is required for interfacing between a user and an object store. In this paper, we propose the query interface which can support object oriented paradigm and design rules of OMI, and implement OMI based on the rules. The OMI have been implemented by using C language on UNIX OS machine.