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와인의 원산지 국가이미지와 와인 이미지, 품질지각, 태도, 만족의 영향관계 연구
박기만 ( Park Ki-man ),박기용 ( Park Ki-yong ) 한국호텔리조트학회(구 한국호텔리조트카지노산학학회) 2016 호텔리조트연구 Vol.15 No.4
This research attempts to examine the influential relationships between the concepts in the decision-making process of consumers` purchase intention to provide basic data for marketing strategies using the country of origin image and wine image, based on the existing researches on the country of origin image and country image and product image. The results of conducting the empirical analysis after establishing the structural model for the relationships between country of origin image, wine image, wine quality, attitude, and satisfaction showed that the country of origin image had statistically significant positive (+) effects on wine image and quality perceptions but had no significant effects on attitude. It was found that wine image had statistically significant positive (+) effects on quality perceptions and attitude, and quality perceptions had significant positive (+) effects on attitude. It was found that attitude had statistically significant positive (+) effects on satisfaction.
Ex-situ 화학적 산화처리 적용을 위하여 다양하게 활성화(heat, Fe<sup>2+</sup>, UV)된 persulfate를 이용한 TCE 분해에 대한 연구
김한솔,도시현,박기만,조영훈,공성호,Kim, Han-Sol,Do, Si-Hyun,Park, Ki-Man,Jo, Young-Hoon,Kong, Sung-Ho 한국지하수토양환경학회 2012 지하수토양환경 Vol.17 No.6
Rreactivity of persulfate (PS) for oxidation of TCE under various conditions such as heat, $Fe^{2+}$, and UV was investigated. It was found that degradation rate of TCE increased with increasing temperature from 15 to $35^{\circ}C$. At pH 7.0, the rate constants (k) at 15, 25, 30, and $35^{\circ}C$ were 0.07, 0.30, 0.74, and $1.30h^{-1}$, respectively. For activation by $Fe^{2+}$, removal efficiency of TCE increased with increasing $Fe^{2+}$ concentration from 1.9 mM to 11 mM. The maximum removal efficiency of TCE was approximately 85% when pH of the solution dropped from 7.0 to 2.5. Degradation of TCE by UV-activated PS was the most effective, showing that the degradation rate of TCE increased with inreasing PS dosage; the rate constants (k) at 0.5, 2.5, and 10 mM were 34.2, 40.5, and $55.9h^{-1}$, respectively. Our results suggest that PS activation by UV/PS process could be the most effective in activation processes tested for TCE degradation. For oxidation process by PS, however, pH should be observed and adjusted to neutral conditions (i.e., 5.8-8.5) if necessary.
디지털트윈 기반 발전용 고온, 고압 배관 구성품의 건전성 평가 기법에 대한 연구
이재빈(Jae-bin Lee),황원식(Won-Shik Hwang),박기만(Ki-Man Park),하승우(Seung Woo Ha) 대한기계학회 2021 대한기계학회 춘추학술대회 Vol.2021 No.4
화력 발전소의 배관은 일반적으로 최고 600℃ 고온 상태로 장기간 운전에 따른 과도한 열변형이 발생한다. 또한, 복합 화력 발전소의 경우는 일주일 또는 하루 단위로 운전과 정지를 반복하는 DSS(Daily Start Stop), WSS(Weekly Start Stop)의 운전 방식으로 인하여, 고온과 중온(약 100℃) 상태에 따른 과도한 열팽창과 열수축을 발생한다. 이러한 장기적 또는 반복적인 열변형으로 인하여 배관을 지지하고 있는 배관 지지 장치의 성능이 저하될 수 있으며, 성능 저하로 인하여 배관의 거동이 설계치와 다르게 나타날 수 있다. 발전소 배관의 이상 변위는 배관 파손을 발생할 수 있어, 이를 해결하기 위한 수치 해석적 접근이 필요하다.<sup>(1)</sup> 기존 수치 해석 상용화 프로그램인 AutoPIPE 또는 CAESAR II의 경우는 빔(beam)요소 기반으로 T-배관과 같이 분기되는 라인에서의 국부적인 응력 계산에 있어서 보수적으로 평가될 수 있다. 또한, 온도 이력에 따른 잔류 응력 해석이 어려워 배관 거동에 따른 응력 변화를 모사할 수 없다. 본 연구에서는 2020년도에 제시한 고온 고압 플랜트 현재 가동 및 비가동 상태의 변위 및 비틀림(회전) 정보를 이용한 개선된 수치 해석 기법(2)을 통하여, 실제 운전 중인 화력 발전소의 배관 및 배관 지지 장치의 건전성을 평가하였다. 개선된 수치 해석 기법에 대한 신뢰성을 검토하기 위하여 스트레인 게이지를 부착하여 변형률을 측정 비교하였다. 개선된 수치 해석 기법 결과는 측정값 대비 최대 약 15%의 오차로 나타났으며, 경향은 유사하게 나타났다. 실제 운전 중인 화력 발전소의 고온, 고압 배관 및 배관 지지 장치의 건전성 평가를 통해 개선된 수치 해석 기법의 신뢰성을 확보하였으며, 향후 배관 지지 장치의 정비에 있어 전략적인 계획 수립에 적용될 수 있을 것으로 판단된다. The piping of a thermal power plant is generally at a high temperature of 600℃, and excessive thermal deformation occurs due to long-term operation. In addition, in the case of a combined cycle power plant, excessive thermal expansion and thermal contraction occur due to high and medium temperatures due to the operation method of DSS (Daily Start Stop) and WSS (Weekly Start Stop). Due to such long-term or repetitive thermal deformation, the performance of the pipe support device supporting the pipe may be deteriorated, and the behavior of the pipe may appear different from the design value due to the deterioration of the performance. Abnormal displacement of the power plant piping can cause piping damage, and a numerical analysis approach is required to solve this. In the case of AutoPIPE or CAESAR II, which are conventional numerical analysis commercialization programs, it can be conservatively evaluated in calculating the local stress in a branching line such as a T-pipe based on the beam element. In addition, it is difficult to analyze the residual stress according to the temperature history, so it is not possible to simulate the stress change due to the pipe behavior. In this study, the structural integrity of the piping and piping support device of a thermal power plant in actual operation through an improved numerical analysis technique proposed in 2020 was evaluated. In order to examine the reliability of the improved numerical analysis technique, a strain gauge was attached, and the strain was measured and compared. The result of the improved numerical analysis technique showed an error of up to about 15% compared to the measured value, and the trend was similar. The reliability of the improved numerical analysis technique was secured by evaluating the integrity of the high-temperature and high-pressure piping and piping support devices of the thermal power plant in operation.
하승우(Seung-Woo Ha),황원식(Won-Shik Hwang),박기만(Ki-Man Park),백진수(Jin-Su Back),노정호(Jung-Ho Roh),최석준(Suk-Joon Choi),조선영(Sun-Young Cho),전현익(Hyun-Ik Jeon) 대한기계학회 2017 대한기계학회 춘추학술대회 Vol.2017 No.11
‘Hot Reheat Line’, which is the reheat steam pipeline among power plant pipe system supplies the reheated steam to the turbine and maintains the constant levels in temperature, pressure and flow rate through equalizing pipeline connected by branching from the main lines. As such a type of piping is the basic configuration of the power plant pipe, most of the coal-fired power plants have the same configuration, which thereby makes damages take place in the similar section and pattern. Similar pipe damages used to occur so repeatedly over time that the only way available would be to adjust the support devices and restore the damages tentatively through repair welding, as a sort of follow-up measure. In this study, it is assumed that the most integral state of the piping should be those initially installed based on the design, so that the pipelines in the Cold condition could be positioned close to the initial construction state, under which the changes of the stress distribution responding to changes of pipe positions would be confirmed by using AutoPIPE, a commercial pipe analysis program. thereafter, the strain gauges for high-temperature purpose are put up on the highly stressed sections to acquire the data concerned, with which the verification and evaluation processes could be carried out against the results of program analysis.
고온 플라즈마 용융을 통한 비산재의 지속가능한 재활용 적용성 평가 연구
강장현(Jang-Hyun Kang),최명규(Myung Kyu Choi),윤영삼(Young-Sam Yoon),홍수연(Soo-Yeon Hong),박기만(Ki-Man Park),유흥민(Heung-Min Yoo) 한국환경에너지공학회 2022 한국열환경공학회 학술대회지 Vol.2022 No.2
The largest domestic landfill in the Seoul metropolitan area is at capacity and the Ministry of Environment recently announced a ban on direct landfilling of municipal waste beginning in 2026. Therefore, the volume of wastes incinerated and the associated incineration ash are expected to increase. Therefore, in this study, municipal solid waste incineration fly ash (MSWIFA) was selected as a research target because it cannot be recycled in a sustainable recycling technology because of its high loss of ignition and high heavy metal content. It is mostly landfilled as designated waste, unlike bottom ash with a relatively high recycliI1g rate. Samples of MSWIFA were collected from 14 incineration facilities located in the Seoul metropolitan area. In addition, our research on the recycling of MSWIFA included a literature review, the analysis of its basic characteristics, and melting experiments. In the plasma melting process, we used the 100 Kwh plasma torch (50 kg/h) operated at 100 N220 V. The operating temperature of the torch ranged from 5,000 to 10,000°C , and the reactor temperature was maintained at 2,000°C or higher. The melting conditions adjusted for reduction conditions by N₂ gas. Under reduction conditions, the slag and metal layers were separated. Additionally, the water-cooling centrifugal bubbling apparatus reduced the temperature of flue gas and collected dust and sulfides. The flue gas was emitted through the induced draft fan/stack. In the leaching analysis, the results showed that seven heavy metals (Arsenic, Cadmium, Chromium, Copper, Cyanide, Lead, Mercury) from melted MSWIFA slag (MFAS) were not detected along with a chlorine reduction rate of 99.3%. The hazardous heavy metal contents from MFAS met all the level of soil contamination on Soil Environment Conservation Act in South Korea.
Rohrer지수에 의한 한국과 중국 연변지역 조선족 아동의 체격비교
남은우,박기만,배성권 韓國學校保健學會 1996 韓國學校保健學會誌 Vol.9 No.1
This paper was performed to comparative study with the children's body strength status of Ethinc Korean in China and Korea. The subjects of this study were the students of each elementary school located in a rural and a urban areas in China. To compared the elvel of their body strength status, we investigated to the students of 2 elementary schools as comparative group on Kojae Area in Korea. We used student's physical record in the school. The contents of the study were the body weight, the chest circumstance, and the body height of the subjects. To make out the level of the students' physique, we measured by Rohrer Index output through above body height and body weight of them. The results of this were as follows; 1. In the case of Ethinc Korean in China, the average body weight(kilogram) is 28.94±6.68 in male 28.51±7.58 in famels. Comparatively, the average body weight in the case Korean is 31.99±7.23 in male and 31.74 ±7.82 in female. The average body height of Ethnic Korean is inferior about 2~5 Kilograms to that of Korean. 2. The average chest circumstance(centimeter) is 63.51±5.21 in male 63.05±5.87 in female of Ethinc Korean, 65.54±6.43 in male and 64.57±7.81 in female of Korean. Compared to between two group, the average chest circumstance of Ethinc Korean is inferior about 2~4 centimeters to that of Korean. 3. The average body height(centimeter) of Ethinc Korean is 135.28±8.96 in male 134.82±9.74 in female, and that of Korean is 136.68±9.12 in male and 136.10±9.92 in female. Like the preceding below results, the average body height of Ethinc Korean is inferior about 2~5 centimeters to that of Korean. 4. Compared to the fullness degree of physique between two group using Rohrer Index, Ethinc Korean is thiner than Korean. 5. Temporary, in case of children from 10 to 12 years old, female is superior to male through the index contained of the body weight, the chest circumstance, and the body height. It seems that female and male had different maximum growth age.