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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.
중소도시 직장인의 여가활동이 생활만족에 미치는 영향 : 보령지역을 중심으로
노일환,이홍주 公州大學校스포츠科學硏究所 2001 스포츠科學硏究所論文集 Vol.- No.15
The purpose of this paper is to analyze the relationship of recreational activity and its effects on the workers in rural cities the Chung-Nam province. Two-hundred, thirty-five workers in the Boryeong-si area were randomly selected to participate in the survey. They were analyzed according to gender, religiosity, income level, age and their preferred choice of recreational activity. The level of "festyle satisfaction"as measured according to a self report question are and compared with the subject's preferred recreational choice. This survey focused on the level of reported satisfaction levels in the home and business environments. Distribution of Leisure Satisfaction: With regards to male and female respondents; the men were found to prefer physically demanding activities while the women preferred less physically demanding hobbies and crafts. Workers who claimed religious affiliation tended to engage in sports activities while those claiming no religious affiliation tended to participate in social meetings and travel activities. There were no significant differences between the respondents' economic levels. Those workers in their thirties selected activities relating to cultural awareness and recreation hobbies. The ones in their forties selected activities that were more physically demanding. As for the respondents in their fifties, social meetings and travel activities scored highest. Leisure Activities and Satisfaction : The reasons workers gave for participating in recreational activities were as follows; Rest(M=3.61), Physical Fitness(M=3.53), Socialization(M=3.47), Educational(M=3.39), Psychological Well Being(M=3.26), The most to least satisfying activities were; Sports(M=3.61), Sightseeing and Cultural Appreciation(M=3.44), Social Meetings and Travel(M=3.40), Hobbies and Cultural Awareness(M=3.30). Demographic Information and Leisure Satisfaction: The significant overall factors effecting satisfaction levels of free time were age and income. In the area of business satisfaction, gender and income levels were the most influential factors. Gender and age was most influential in the area of lifestyle satisfaction. Overall, women reported more satisfaction than men. Older respondents reported higher levels of satisfaction that younger respondents. Free Time Satisfaction and its Impact on Business, Homelife Educated professionals who reported satisfied free time activities indicated a satisfied business life(27.7% above other respondents). The same workers indicated a satisfactory home life(18.41% above other respondents) and experienced enhanced psychological well being. This groups free time satisfaction was related to cultural and lifestyle satisfaction(6.12% above other respondents). Business and homelife satisfaction impacted lifestyle satisfaction at the rate of 9.94%. It was noted that business satisfaction scored higher in the rating scales than did home satisfaction.
盧弘均 嶺南大學校附設 基礎科學硏究所 1981 基礎科學硏究 Vol.1 No.-
The effective concentration of incident light flux on conic and parabolic collecting devices was derived. The dissociation rate as a function of radius from the axis in the laser tube and that on the axis derived. And incident ratio(the ratio of incident light flux by the chopper to full incident flux) was discussed to study the rise time.
노홍균 嶺南大學校附設 基礎科學硏究所 1984 基礎科學硏究 Vol.4 No.-
The threshold kinetics is examined to understand the characteristics of the iodine laser and the products of photodissociation are summarized. The reaction terms are analyzed and the reaction rates are summarized to evaluate the optimum value.
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%.
盧澈均,裵英鎬,金洪必 慶一大學校 1991 論文集 Vol.7 No.1
This paper presents a new adaptive control algorithm which is robust with respect to unmodeled dynamics and bounded disturbances. In this algorithm the control law is augmented with a term proportional to the product of output error and the normalizing signal, but the adaptive law is the conventional one used to control the system without unmodeled dynamics and bounded disturbances. The boundedness of parameter estimates and the other signals in the overall system will be proved, and some simulation results are presented.
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.