• Journal of the Korean Society of Manufacturing Process Engineers
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• 제18권4호
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• pp.26-33
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• 2019

This study is a thermal and flow analysis of Organic Rankine Cycle (ORC) pipe line for 250 kW grade waste gas heat recovery. We attempted to obtain the boundary condition data through the process design of the ORC, which can produce an electric power of 250 kW through the recovery of waste heat. Then, we conducted a simulation by using STAR-CCM+ to verify the model for the pipe line stream of the 250 kW class waste heat recovery system. Based on the results of the thermal and flow analyses of each pipe line applied to the ORC system, we gained the following conclusion. The pressure was relatively increased at the pipe outside the refracted part due to the pipe shape. Moreover, the heat transfer amount of the refrigerant gas line is relatively higher than that of the liquid line.

• Journal of the Korean Society of Manufacturing Process Engineers
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• 제18권5호
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• pp.90-95
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• 2019

This study aims to gain the design data through the process design of the organic Rankine cycle, which can produce 250kW of electric power through waste heat recovery. In this study, a simulation was conducted using APSEN HYSYS to make the model for the process design of the 250kW-class waste heat recovery system. For the thermodynamic model, the test was conducted with hot water as the heat source, the water steam as the cooling water for the cooler, and the refrigerant R245FA in the cycle. In the final design, it was expected and found from the simulation that the cycle efficiency was 12.62% and that 250kW of power was produced considering the margin of 80%.

• Journal of the korean Society of Automotive Engineers
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• 제7권4호
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• pp.1-8
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• 1985

인류에 필수불가경한 에너지는, 석유, 석탄과 같은 화석연료에 의한 염에너지와 수력, 조력, 파력, 풍력 등의 비열에너지가 있으나, 에너지이용량중 열에너지가 절대적 우위를 점하고 있다. 열에너 지는 전기한 화석연료 뿐만 아니라, 태양집, 태양열발전소와 같은 태양열에너지의 직접이용, 핵에 너지의 열에너지전환, 지열, 해수의 온도차이용등, 열에너지는 다량하면서 막대한 에너지량을 보 유하고 있는 실정이지만, ㅈ로 석유자원에 의존하여 온 것이 현상이다. 그러나, 1970년대 초기에 엄습한 석유파동이래, 세계적으로 에너지위기감에 사로잡혀, 세계각국은 탈석유화에 따른 에너지 의 다양화와 에너지절약이 감소되게 되었다. 연료절약에 관하여 말하면, 에너지이요의 효율화를 적극적으로 도모함에 있어서 열에너지이용에 관한 평가방법에 새로운 검토가 가해져서, 더 합 리적인 평가방법의 확립이 필요하게 되었다. 이를 위해서는 종래의 열역학 제1법칙에 의한 열 에너지의 양적평가 뿐만 아니라, 열역학 제2법칙에 의한 질적평가의 중요성이 인식되어, 유효에 너지(available energy) 또는 엑세르기(Exergie)의 개념이 위상되고 있다. 물론 이 개념을 적용 하여 열역학 제2법칙에 의한 해석에 따른 일정산(heat balance)에 있어서 전혀 새로운 결과가 얻어지는 것은 아니지만, 지금까지는 열정산에 있어서 열역학 제1법칙에 의한 평가방법만이 강 조되어, 열역학 제2법칙에 의한 평가방법은 거의 도외시되어온 것이 실정이며, 우리나라에서 발 간되는 열역학에 관한 도서에서도 이에 관한 검토 내용이 거의 찾아볼수 없거나, 가령 언급된 것이 있다 하더라도 그 내용이 간략하여 그 중요성이 경시되어온 것이 사실이다. 그러나 열역학 제2법칙에 의한 에너지정산에 의하여, 제1법칙에 의한 것보다 열에너지의 합리적이고 또한 유 효한 과학적평가가 가능하게 되어, 장치나 기기의 개선에 구체적이면서 합리적인 지침이 주어 지게 된다. 그리하여 이들 개념과 방법의 소개가 필요하다고 생각되어, 지금부터 우리들이 잘 아는 용어를 사용하여 해설을 서로 하기로 한다.

• Journal of dental hygiene science
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• 제12권1호
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• pp.7-13
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• 2012

Critical thinking is a essential competency for dental hygiene education and practice. The purpose of this study was to examine critical thinking disposition between groups classified by GPA score in two dental hygiene educational program. A total 252 dental hygiene students responded. The study extracted six dimensions(intellectual eagerness/curiosity, prudence, healthy skepticism, intellectual integrity, objectivity, self-confidence) derived from 27 items with the exception of systematicity using factor analysis. The mean score for critical thinking disposition was 3.47 on a 5 point scale. The result showed a statistically significant correlation critical thinking disposition and age. Multivariate analysis of covariance(MANCOVA) was used to compare six subscales between the three groups. MANCOVA results revealed that intellectual eagerness/curiosity for three groups were significantly different(Wilks's lamda=0.914, F(6, 24)=1.869), p=0.01, partial eta square=0.044). Multiple comparison for intellectual eagerness/curiosity by Scheffe's method showed differences between high score group and mid score group(p=0.027), high score group and low score group(p=0.002). In this study, academic achievement and critical thinking tends to show significant correlations is known. Critical thinking skills by examining the actual grade compares the difference in propensity scores according to a case study in intellectual curiosity, passion, and could tell the difference to appear.

• The Safety technology
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• 제198호
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• pp.21-23
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• 2014

우리나라 주거문화는 시대적, 환경적인 요인에 따라 많은 변화를 겪어왔다. 아파트 전성시대가 계속된 가운데 주상복합, 전원주택, 땅콩주택 등 다양한 주거 형태가 나타나기 시작한 것이다. 이런 변화의 중심에는 집이라는 공간을 단순히 먹고, 잠자는 곳이 아닌 '가족 구성원들의 보다 건강하고 행복한 삶을 만들어가는 특별한 영역'이라고 생각하는 인식이 자리 잡고 있다. '꿈의숲 SK VIEW'가 많은 이들의 관심을 받고 있는 이유가 바로 여기에 있다. 강북구의 중심에 들어설 예정인 것은 물론이고 인근에 우이천, 북서울 꿈의숲, 초안산 등이 위치해 있어 도시의 편리함과 생동하는 자연을 동시에 느낄 수 있다는 것이 최대 장점으로 꼽히고 있는 것이다. 때문에 이곳을 조성하고 있는 SK건설에서는 안전관리에 만전을 기하고 있다. 작은 사고로도 명성에 금이 갈 수 있기 때문이다. 근로자 안전을 최우선으로 신 주거문화를 조성해 나가고 있는 '꿈의숲 SK VIEW' 건설현장을 찾아가 봤다.

• The Journal of the Korea Contents Association
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• 제11권7호
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• pp.448-457
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• 2011

The purpose of this research investigates the relationship among followership, organizational cynicism, and organizational citizenship behavior in Hotel employee. The data are analyzed by such frequency analysis, exploratory factor analysis, reliability analysis, confirmatory factor analysis, covariance structure analysis. The SPSS 10.1 and AMOS 4.0 for Windows program was used to investigate material. The major finding and implication can be summarized as follow: First, the analysis on relationship between followership and organizational cynicism revealed that critical thinking and active participation dimensions of but enthusiasm dimension of followership has not affected organizational citizenship behavior. Second, the analysis on relationship between organizational cynicism and organizational citizenship behavior revealed that organizational cynicism affects organizational citizenship behavior.

• The Journal of the Korea Contents Association
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• 제13권6호
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• pp.450-458
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• 2013

This study aims to suggest implications on hotel HR management through the research on the influence relation with voluntary behaviors that increase the effectiveness of work functions and also hotel employee' perceived followership contributing to achievement of hotel's goals. As study methods to achieve the study objective suggested above, we aim to conduct literature research and empirical study. The data are analyzed by such frequency analysis, validity analysis, reliability analysis, correlation analysis, confirmatory factor analysis, covariance structure analysis. The SPSS 10.1 and AMOS 4.0 for Windows program was used to investigate material. The major finding can be summarized as follow: The analysis on relationship between followership and revealed that 'critical thinking' and 'enthusiasm' dimensions of but 'active participation' dimension of followership has not affected service orientation. The expected effects through this study are like below. First, it is expected that the theory about followership will be extended by verifying the causal relation between followership and internal mental state. Second, it is also expected to be able to suggest alternatives for qualitative improvement of service and emphasis of the importance of hotel employee'.

• Korean Journal of Heritage: History & Science
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• 제54권4호
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• pp.36-59
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• 2021

This study infers the origin and production period of the , which is in the Onyang folk museum, through analysis and interpretation of the Haeju Palgyeong and exploration of the landscapes and traditions contained in the painting. The first collection of landscapes to Haeju was identified as Haeju Palgyeong by Ku Sa-meng (1531-1604). Yoo Man-ju, writing in 1782, referred to it as Go-palgyeong in 『Heumyeong』 while Haeju Palgyeong was defined as Geum-palgyeong (今八景), which is the Haeju Palgyeong in the earliest period confirmed by literature. is 'Boating on the Nam river (南江泛舟)', 'Lotus viewing at Buyongdang (芙蓉賞蓮)', 'Foot washing at Gwangseokcheon (廣石濯足)', 'Seokbyul at Haeunkyo (泣川送客)', 'Fishing at Haeunjeong (東亭釣魚)' and 'Sea view at Namsan( 南山望海)', and the final two contain a picture that contains 'Viewing the moon at Yeonghaeru (瀛海玩月)' and 'Writing contest and Archery at Baeklimjeong (栢林觀德)' The Suyang Chaemi(首陽採薇), Shingwang-jeoljeol (神光霽雪), and Jiseong falls (池城瀑布) of Gopalgyeong, which were excluded from Haeju Palgyeong, are all landscapes unfolding as a grand site of Suyangsan Mountain. is a result of the reorganization of Seunggyeong centered on Eupchi (邑治), away from the Suyangsan area. It has emerged as a seunggyeong of Haeju. The elaborateness of trying to contain the detailed prizes representing Haeju, such as the specialty sake of Haeju, is revealed. Most of the landscapes depicted in are historic and outstanding spots in Haemok, but the scenes of life related to daily life are properly arranged. In addition, Foot washing (濯足), Fishing(釣魚), Doing laundry (漂母), Lotus viewing (賞蓮), Sending guests (送客), Drinking (飮酒), sea viewing (望海), Moon viewing (玩月), Archery (射藝), Poetry (詩作), Drinking tea (飮茶), and Dancing (歌舞) are of various styles. Compared with the Gopalgyeongs, Haeju Palgyeong did not take into account the distribution of landscapes in the four seasons, and the small-sized view was also broken. When considering the time of the construction of Haeunjeong and the deterioration of Yeonghhoeru, it is believed that was produced in the early- to mid-18th century. is considered to be a painting that contributed to strengthening the sense of intimacy with the local people and promoting the pride of Haeju by showing the representative scenery of Haeju, such as scenic spots and customs, away from the ideal utopia.

• The Journal of the Convergence on Culture Technology
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• 제6권3호
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• pp.1-8
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• 2020

EuiJae Hu BaekRyun is a symbol of Honam Namjonghwa and is respected as a teacher of Honam culture. He is from JinDo and is a relative of Sochi Heo Ryun and a disciple of Misan Heo Hyeong. The spirit of traditional Namjongghwa and the dignity of painting faithful to its technique have been obtained by themselves, and have made it his own. EuiJae organized a 'Yeonjinhoe' in Gwangju to raise his students. After liberation, a house was built under Mudeungsan Mountain. And showed another aspect as a social educator who emphasized and practiced national spirit while being a tea ceremony man. He excelled in Chinese poetry and painting theory, and expressed a unique field in calligraphy. especially worked as an artist good at poetry, caligraphy, and painting. EuiJae showed exceptional talent, especially in landscape painting. His tendency to paint was to follow Ye Chan's technique of drawing with a dry brush, placing importance on the energy of learning, and constantly trying new experiments with the technique of gisaeng. The world of EuiJae's works can be divided into three periods, based on the signature using the trend of painting or the change of perspective pursued, the era of EuiJae, the era of EuiJaeSanin, and the era of EuiDoin, which had a tendency of independent painting. EuiJae's contribution surpassed the artistic historical assessment that he had formed a big stem for the authentic Namjongghwa of Korean painting culture, which was part of Oriental painting. And recognizing that he was a fundamental teacher connecting modern times through the actual scenery based on NamDohwa's universal spirit and regional characteristics and the creative succession of emotions, he should inherit his passion for artistic spirit and tradition and experimental spirit.