공기연료비 변화에 있어서 기관출럭에 미치는 각 인자의 영향에 관한 해석

강우정,김문헌,이성열 한국자동차공학회 1983 한국자동차공학회 학술강연초록집 Vol.- No.-

스파아크 점화기관의 출력성능에 미치는 각 인자의 영향

姜宇政 忠州大學校 1987 한국교통대학교 논문집 Vol.21 No.-

The horsepower of internal combustion engines is influenced by three factors; Operating factor, environmental fector and design factor. This study is concerned with the horspower on the veriation of air-fuel ratio as an operating factor. The important experimental results are as follows. 1) The behavior of each factor which influences horsepower in variation of air-fuel ratio was proved. 2) The horsepower is largely influenced by the combustion efficiency in the various factors.

하수 슬러지 건조 공정의 경제성 평가에 관한 연구

姜宇政,申澈洙,梁晶模 충주대 2004 産業科學論文集 Vol.12 No.-

To solve the water pollution prevention problems, sewage and wastewater disposal system as the basic facilities are required strongly. However, the production of sewage sludge, a by-product of sewage and wastewater disposal system, is tending to increase. Therefore, efficient disposal method of sewage and wastewater is needed. At present, there are many problems in current disposal methods such as open dumping, ocean disposal, and incineration. These cause secondary environmental problems. Recycling sewage sludge is an alternative method to solve these problems thoroughly and prevent environmental disruption and maximize economic usefulness. This study presents LCA(Life Cycle Assesment) application to analyze the environmental loads and economy of sewage sludge drying process. The obtained results are applied to prepare fundamental understanding and judgement in view of environmental and economical consideration on drying process of sewage sludge by local authorities. The results are as follows; The economic assessment showed that the expense of drying process of sewage sludge was 45,603 won per ton. Among the expense items, the fuel cost is around 35%(15,961 won per ton) and it is the main cause. It is regarded that reducing the fuel can obtain the reduction of the cost and carbon dioxide, major environmental pollution discharge.

PPCP 장치에서 NOS_x 및 SO_x 의 동시저감에 따른 C₂H₄가스의 첨가효과

姜宇政 충주대 2001 한국교통대학교 논문집 Vol.36 No.1

In the case when noxious materials are NOx and SOx that have the same concentration in the sample gas, the reduction rate of NOx and SOx is increased becouse the ionization works well in the ractor and rabical reaction among NOx, SOx and C2H4.When the initial concentration of NOx and SOx is lower, the additional amount of C2H4 is higher, the flow rate is lower, the oxgen concentration is higher, and the input voltage and the frequency are higher, the reduction rate of NOx and SOx are increased similarly.

회전건조로를 이용한 하수슬러지 건조 인자에 관한 실험적연구

姜宇政,李基福 충주대 2003 産業科學論文集 Vol.11 No.-

The general methods of sewage sludge disposal Simple reclaiming, Dumping in the sea, Incineration are causing so many problems, and sewage sludge dry for safety disposal can cut down on the delivery expense from reducibility effect of the volume and weight, also can prevent the several second environmental pollution. It is a necessary process of the multiple disposal method to raise a economization and efficiency of sewage sludge final disposal. Such a point of this view, dry is a simple method, but chemical properties, heat properties, physical properties by physical law of sewage sludge have brought a difficulty of dryer operation. Therefore in this study of several factors occurred during operating a dryer has been systematically formed, and as a result of the test to draw out the optimal drying process condition with the factor the amount use of fuel, pressure, over air amount, damper opening and shutting rate, rotary kiln revolutions, transfer device revolution in the rotary dryer, by using Taguchi method. It is achieved a hight efficiency of dryer that is decided the most suitable operating condition of swage sludge dryer

펄스코로나 방전에서의 NOⅹ 저감 에너지 효율에 관한 실험적 연구

姜宇政,申昌均 충주대학교 산업과학기술연구소 2002 産業科學論文集 Vol.10 No.-

Rapid recent development in industry generated environmental issues. The NOx, the main cause for the air pollution, increases the Ozone-concentration and becomes a factor for the photochemical smog and acid-rain. Thus, the preventive method as well as the inhibitive technique for NOx have been demanded. The purpose of present study is to change the harmful gas using high voltage pulse system. In order to reduce the harmful NOx, experiments were done with changes in gas temperature, NOx initial concentration, C_2H_4 concentration, and the amount of pulse voltage.

중국 유학생의 가족건강성이 SNS 중독경향성에 미치는 영향: 자아탄력성의 매개효과를 중심으로

강우정,박정윤 한국가족자원경영학회 2023 가족자원경영과 정책 Vol.27 No.4

본 연구는 중국 유학생의 가족건강성이 SNS 중독경향성에 미치는 영향에서 자아탄력성의 매개효과를 살펴보고자 하였다. 이를 위해 한국에 재학 중인 중국 유학생 349명을 대상으로 설문조사를 진행하였고 수집된 자료는 SPSS Statistics version 28 프로그램과 SPSS Process Macro 4.3으로 분석하였다. 주요 연구결과는 다음과 같다. 첫째, 중국 유학생의 SNS 중독경향성, 가족건강성, 자아탄력성을 살펴보면 중간보다 높은 수준으로 나타났다. 둘째, 중국 유학생의 SNS 중독경향성은 SNS 하루 평균 이용 시간은 정적 상관관계를, 가족건강성과 자아탄력성과는 부적 상관관계를 나타냈다. 셋째, 위계적 회귀분석 결과, 성별, 가족과의 연락 빈도, SNS 하루 평균 이용 시간, 가족건강성 중 질적 유대감, 자아탄력성 중 통제성이 유학생들의 SNS 중독경향성에 영향을 미치는 것으로 나타났다. 넷째, 가족건강성이 SNS 중독경향성에 미치는 영향에서 자아탄력성이 완전 매개효과가 있었다. 본 연구는 중국 유학생의 SNS 중독경향성을 예방하는 변인으로 가족건강성과 자아탄력성을 밝혔으며, 이를 통해 중국 유학생의 SNS 중독경향성을 예방하기 위해 상담 개입의 방향성을 제시하였다. The purpose of this study was to examine the mediating effect of ego resilience on the relationship between family strengths of Chinese international students and Social Networking Services(SNS) addiction tendency. The data were collected through a survey of 349 Chinese international students studying in Korea and analyzed using the SPSS Statistics version 28 program and SPSS Process Macro 4.3. The main results are as follows. First, Chinese international students exhibited higher-than-average levels of SNS addiction tendency, family strengths, and ego resilience. Second, the SNS addiction tendency of Chinese international students had a significant positive correlation with the average time spend on SNS per day. while demonstrating a negative correlation with family strengths and ego resilience. Third, the hierarchical regression analysis revelated that gender, frequency of contact with family, average time spend on SNS per day, qualitative bond as a sub variable of family strengths, and control as a sub variables of ego resilience were significant factors influencing SNS addiction tendency of Chinese international students. Fourth, the study confirmed the complete mediation of ego resilience in the effect of family strengths on SNS addiction tendency. Based on the research results, this study suggested specific directions for counseling interventions aimed at mitigating SNS addiction tendencies among Chinese international students.

內燃機關에서의 熱損失에 關한 硏究

姜宇政 충주대학교 1994 한국교통대학교 논문집 Vol.29 No.1

The major objective of this study is to assume the heat loss during the combustion period. For this purpose two methods are suggested. The first is to transform p-v diagram which can be got from the indicator diagram through an experiment into the equivalent constant volume cycle, moreover being in search of the adiabatic constant volume cycle under the same initial conditions of combustion, then to utilize the differences of the peak temperatures for these two cycles. The second is to make use of the heat release through the analysis of indicator diagrams. In case of changing atmospheric conditions, the heat loss during the combustion period obtained by two methods is nearly corresponding. Therefore, it is concluded that these methods for heat loss during the combustion period are reasonable.

조종사를 대상으로한 Human Error 예방제도에 대한 연구

강우정 韓國交通大學校 2013 한국교통대학교 논문집 Vol.48 No.-

Human error has been cited as a primary cause or contributing factor in disasters and accidents in industries as diverse as nuclear power, aviation, space exploration, and medicine. The origins of Human Factors as a profession with its own domain of expertise are not all self-evident. In fact, humans have been increasing causal factor in both military and civilian aviation accidents as mechanical equipment have become more reliable. Today, a very large percentage of all aviation are attributable, directly or indirectly, to some form of human error. It is therefore intended that the ICAO Human Factors Digests will become a source of both infotmation and practical measures to be used in the effort to improve education, training and remedial measures in Human Factors. As a result of many study, a range of prevention of human error have been developed. but each of kind is lack of a precision, effectiveness and seem to be considered for aspect of deficiency as an systematic accessibility. So, we're going to sort the most effective and systematic prevenetion of human error and concentrate on consolidating method for human error and aviation safety.

하수슬러지 건조로 내부의 열유동 해석

강우정 忠州大學校 2007 한국교통대학교 논문집 Vol.42 No.-

There have been attempts to perform the sewage sludge disposal such as simple reclaiming, dumping in the sea and incineration. Currently, these methods are restricted by national or international government regulations. The drying process is adopted as an effective method for sewage sludge treatment, however sewage sludge makes it difficult to treat with large volume at the real drying process plant because of its own complicated physical, chemical and thermal properties. This paper presents the numerical analysis of sludge drying process to know the characteristics of design parameters and develop the new process plant. Finite Volume Method and turbulence model was used to analogy the sludge drying furnace. The final design value of moisture content 10% of the dried sludge can be obtained through the simulated outputs in this study.