장거리 통신망에서 음성반향제거기의 설계

김진민,김대성,최정고,류근택,배현덕 ( Jin Min Kim,Dae Sung Kim,Jung Go Choe,Geun Teak Ryu,Hyeon Deok Bae ) 충북대학교 산업과학기술연구소 1995 산업과학기술연구 논문집 Vol.9 No.1

임펠러 형상 개선을 통한 원심형 송풍기의 유량 개선

김진민(Jin Min Kim),김재원(Jae Won Kim),장동희(Dong Hee Jang),금경필(Kyung Pil Kum),박상욱(Sang Wook Park),김병진(Byung Jin Kim) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.6

Comprehensive experimental works are carried out for the optimal design of a turbo blower adopted in an indoor unit of a handy vacuum cleaner. Impeller and its auxiliary structure are very important factor for the performance of it. The main interest lies in the fluid dynamics performance when the blower rapidly rotates in a product system. The estimations of blower performance was performed by using the wind tunnel and PIY measurement for the detail flow information of outlet side. The turbo fan shows the performances in terms of flow rate and suction pressure are important factor in a vacuum cleaner. It is found that the reduced area and inclination of fan base-plate increases the flow rate and efficiency.

GFRP 거푸집을 활용한 다운공법의 개발

김진민(Kim, Jin Min),박선치(Park, Seon Chee),홍원기(Hong, Won Kee),김희철(Kim, Hee Cheul),이호찬(Lee, Ho Chan),김점한(Kim, Jeom Han) 한국콘크리트학회 2007 한국콘크리트학회 학술대회 논문집 Vol.2007 No.11

바다모래 채취로 인한 해양환경 영향 조사의 개선 방안

김영태(Yeong Tae Kim),김귀영(Gui-Young Kim),이대인(Dae-In Lee),전경암(Kyeong-Am Jeon),엄기혁(Ki-Hyuk Eom),강성경(Seong-Gyeong Gang),김인철(In-Chul Kim),김진민(Jin Min Kim),최보람(Bo Ram Choi) 한국해양환경·에너지학회 2013 한국해양환경공학회 학술대회논문집 Vol.2013 No.11

바다모래 채취 시 해수 수질 및 생태계 영향에 대한 해양환경조사 개선 방안

김영태,김귀영,전경암,엄기혁,김인철,최보람,김희정,김진민,Kim, Yeong-Tae,Kim, Gui-Young,Jeon, Kyeong-Am,Eom, Ki-Hyuk,Kim, In-Chul,Choi, Bo-Ram,Kim, Hee-Jung,Kim, Jin-Min 해양환경안전학회 2014 해양환경안전학회지 Vol.20 No.2

본 연구에서는 우리나라의 주변 해역에서 바다모래 채취 시 발생되는 현탁류에 대해 5년간(2008년~2012년) 해양환경조사서 내 조사 현황을 검토하였다. 이 기간 동안 연 근해역 내 7곳(남해 EEZ, 서해 EEZ, 서해 EEZ 변경 단지, 태안군 관할 해역, 안산시 관할 해역, 옹진군 관할 해역 2곳)의 바다모래 채취구역 중 2곳(EEZs와 연안역 내 채취 구역 각각 1곳)에서 현탁류 내 부유토사의 확산과 이동에 관한 현장 관측이 수행되었다. 그러나 해역별 해양물리적, 지형적 특성과 기상 조건을 반영한 조사 정점 및 범위를 선정한 사례는 확인되지 않았다. 조류, 파랑, 바람장, 수심, 하계 성층화 등의 영향에 의해 부유토사는 바다모래 채취 구역을 넘어 훨씬 더 먼 거리까지 이동될 수 있다. 따라서 바다모래 채취 과정에서 해저층 퇴적물의 재부유, 그리고 준설선박의 여수토와 배사관에서 배출되는 월류수 등에서 기인한 부유토사의 확산에 대해 집중 모니터링 방안과 세부 조사 기법의 도입이 필요하다. 또한 현탁류의 확산 경로상에서 부유물질, 영양염, 중금속 등의 오염물질로 인해 주변 해양환경과 유용 수산생물이 포함된 해양생태계 등에 미치는 누적 영향을 추적하고, 환경 피해를 최소화하기 위한 통합 지침안을 마련해야 한다. We reviewed investigation status on turbidity plume in the statement of marine environmental survey(2008 to 2012) associated with marine sand extraction projects. The survey statement from seven marine sand extraction sites (extraction area of Southern EEZ, extraction area of Western EEZ, relocation zone in the Western EEZ, sea area under jurisdiction of Taean-gun, sea area under jurisdiction of Ansan City, and two discrete sea areas under jurisdiction of Ongjin-gun) in the nearshore and offshore of Korea showed that in situ observations were carried out for the dispersion and transport of suspended sediments on two areas (One is a extraction area in the EEZs, the other is an area of coastal sites). However, sampling station and range have not been selected considering physical, geographical factors (tide, wave, stratification, water depth, etc.) and weather conditions (wind direction and velocity, fetch, duration, etc). Especially turbidity plumes originating from three sources, which include suspended sediments in overflow(or overspill) discharged from spillways and reject chutes of dredging vessel, and resuspended sediments from draghead at the seabed, may be transported to a far greater distance outside the boundary of the extraction site and have undesirable impacts on the marine environment and ecosystem. We address that behaviour of environmental pollutants such as suspended solids, nutrients, and metals should be extensively monitored and diagnosed during the dispersion and transport of the plume. Finally we suggest the necessity to supplement the current system of the sea area utilization consultation and establish the combined guidelines on marine sand extraction to collect basic data, to monitor cumulative effects, and to minimize environmental damages incurred by the aftermath of sand extraction.

볼트 체결부를 갖는 깊은 수심용 실린더형 내압용기의 수압시험과 유한요소해석 결과 비교

김진민(Jinmin Kim),최혁진(Hyeukjin Choi),이승국(Seungguk Lee),이승훈(Seunghun Lee) 한국해양환경·에너지학회 2016 한국해양환경·에너지학회 학술대회논문집 Vol.2016 No.5

본 논문에서는 외압을 받는 깊은 수심용 실린더형 내압(耐壓)용기의 구조적 거동을 파악하기 위해 사용압력이 각각 20, 30 MPa인 내압용기를 설계, 제작하였다. 수압시험 전에 수행한 내압용기모델의 유한요소해석과 스트레인 게이지를 이용한 변형률 계측시험의 결과와 비교하였다. 평판 덮개를 제외한 유한요소해석과 수압시험의 결과값은 약 10% 정도의 차이를 보여 유사한 결과를 나타내었다. In this paper, the pressure vessel was designed and manufactured with operating pressure of each 20 and 30 MPa each in order to understand the structural behavior of the cylindrical pressure vessel designed for in-depth use under external pressure. The compared with the results of peformed the Finite Element Analysis of pressure vessel model and Strain measurement test using strain gauges before the hydrostatic test. The result of FEA and hydrostatic test except for the flat-cover exhibited similar result to show the difference of approximately 10 %.

미용실의 서비스 스케이프가 고객반응 및 고객만족도에 미치는 영향

김진민 ( Jin-min Kim ),진용미 ( Young- Mi Jin ) 한국미용학회 2018 한국미용학회지 Vol.24 No.4

Service is not shown in the form like physical product or structure, but consumed as soon as it is produced. As service is shown in the form like convenience, timeliness, pleasure, comfortability, and healthiness, it could be defined as all the economic activities providing the added-value. Because the beauty service business also provides the added-value, it means the physical environment, instead of meaning the internal/external design facilities of service. In the physical and spatial aspect of environment surrounding consumers, customers' perception is influenced through humans' sensory organs. Regarding the emotional expression, positive behaviors are expressed even for customers' many demands. The friendliness from inner side could be a factor having effects on the customer satisfaction and maintenance of continuous relationships. Recently, there have been active researches on emotions felt by consumers, and the influence of these roles is great by consumers. Thus, this study conducted the empirical analysis on total 400 questionnaires targeting male and female ordinary people using beauty shops in Seoul. For the collected data, the frequency analysis, multiple regression analysis, reliability analysis, and factor analysis were performed. First, the servicescape was shown as factors like internal environment, dress, and communication. In the results of examining the level of customers' emotional response and customer satisfaction, two factors like customer dissatisfaction and customer satisfaction were drawn through three factors like internal environment, dress, and communication. Second, in the results of understanding the effects of servicescape on the customer response, the factors had different effects on the response to customer dissatisfaction and customer satisfaction. Third, in the results of understanding the effects of servicescape on the customer satisfaction, the factors like internal environment, dress, and communication had the same effects on the customers' WOM intention and satisfaction. The objective of this study is to seek for measures of better service and also to secure customer response and customer satisfaction by servicescape, by understanding the influence relationships between servicescape, customer response, and customer satisfaction of beauty shop.

선택형 컨조인트 분석(Choice-based Conjoint Analysis)을 통한 제품-서비스 통합 효과 분석

김진민(Jinmin Kim),박광태(Kwangtae Park),임호순(Hosun Rhim) 한국경영과학회 2014 한국경영과학회지 Vol.39 No.1

PSS (Product-Service System) is a competitive strategy for a service company or a servitized manufacturer. We investigate the product-service integration effect in a mobile phone service industry. Using choice-based conjoint analysis, we measure main and interaction effects of product and service. We collected a sample of size 171 from a college student group in Seoul, Korea. We find the existence of the interaction effect of product and service in PSS and show the direction of PSS strategy using main and interaction effect.

국내외 학생들의 상생(相生)을 위한 교수법 개발

김진민 ( Kim Jinmin ),김재영 ( Kim Jaeyoung ),구상회 ( Koo Sanghoi ),권용현 ( Kwon Yongyun ) 고려대학교 세종경영연구소 2019 경상논집 Vol.39 No.1

국내 대학의 외국인 유학생 비중은 매년 꾸준히 증가하고 있다. 학교의 입장에서 외국인 유학생 유치는 중요한 과제이다. 유학생들이 지출하는 학비나 생활비는 국가경제에 있어서 보탬이 될 수 있으며, 국제화 수준을 가늠하는 지표로서도 유학생의 수는 의미가 있다. 대학의 입장에서도, 대학에 대한 정부의 재정지원에는 한계가 있는 상황에서 유학생 유치를 위한 새로운 재원확보는 중요한 과제가 될 수 있다. 특히 한국의 경우에는 인구구조상 대학 재학생의 수가 점점 더 줄어들 수밖에 없는 환경으로서, 유학생 유치를 위한 노력은 대학에 있어서 필수적이라고 할 수 있다. 이에 외국인 학생만이 아닌 내국인 학생과의 상생(相生)을 위한 교수법 제고 방법을 연구하고자 한다. 외국인 유학생의 학업 부적응과 외국인 학생 관리의 문제가 지속적으로 나타나고 있는 상황 하에서 내외국인간의 인식의 차이를 밝히고, 이를 통한 국내학생들이 외국인 유학생과 교환학생들과 함께 학습하고 함께 생활할 수 있도록 동기부여 방안을 연구한다. 결과적으로 외국인 학생들의 국내 생활 적응 및 학업 역량 제고를 위한 상생의 교수법 탐색과 개발에 그 목적이 있다. The proportion of international students in Korean universities is increasing every year. At the school's side, attracting international students is an important task. The tuition and living expenses that international students spend can be helpful to the national economy, and the number of international students is meaningful as an indicator of the level of globalization. From the standpoint of universities, new funding for attracting international students can be an important task, given that government funding for universities is limited. In particular, in Korea, the number of university students is gradually decreasing due to the demographic structure, and efforts to attract international students are essential for universities. In this regard, I would like to study how to improve the teaching method for coexistence with Korean students, not just foreign students. Under the circumstances of international students' maladjustment and management of international students, the difference in perceptions between Koreans and foreigners is revealed, and the motivation for domestic students to learn and live together with foreign students and exchange students. As a result, the aim is to explore and develop win-win pedagogy for foreign students' adaptation to domestic life and to enhance their academic ability.

암호화폐의 가격결정요인에 관한 실증연구: 규제리스크, 매스미디어 노출 및 신규상장 효과에 관하여

김진민(Jinmin Kim),권용현(Yonghyun Kwon) 한국정보사회학회 2019 정보사회와 미디어 Vol.20 No.2

본 연구는 금융시장에서 중대한 이슈로 부각되고 있는 암호화폐의 가격결정요인에 대한 실증분석을 시도하였다. Cheah & Fry (2015)의 연구에 의하면 암호화폐의 경우 내재가치가 존재하지 않으며 가격에 대해서 투자자들의 투기적 요인들이 가격에 중대한 영향을 미치고 있다. 본 연구는 규제리스크의 증감, 매스미디어 노출, 신규상장의 세 가지 상황에 주목하여 암호화폐의 가격의 결정요인을 실증하고자 하였다. 결과적으로 본 연구는 매스미디어 노출에 따른 신뢰도의 증가에 따라 암호화폐의 가격이 영향을 받는다는 점을 실증하였다. 또한 본 연구는 신규상장에 따른 신뢰도 및 잠재적 수요자(투자자)의 증가가 암호화폐의 가격에 긍정적인 영향을 미칠 수 있음을 확인하였다. 본 연구는 아직 명확히 밝혀지지 않은 암호화폐의 시장가격 결정요인에 대해, 자산의 펀더멘탈적 요인이나 수요-공급이 아닌 인지도와 신뢰도 관점에서 결정요인을 규명하기 위한 시도로서 학술적으로 의미가 있다. 본 연구의 결과는 객관적이고 정량적인 가격결정에 어려움을 겪고 있는 암호화폐 시장의 투명성을 제고하고, 시장의 효율성을 높이는데 기여할 수 있을 것으로 기대한다. This study is an empirical analysis on the valuation of cryptocurrency, which has recently become a serious issue in financial markets. However, investors" interest in investing is very high, but there are only a few researches on the determinant of price of cryptocurrency. Especially, because there is no official exchange as New York Stock Exchange (NYSE), and there is also no public disclosure system or regulations. Therefore, information asymmetry is extremely high. In this paper, we empirically study on the determinant of cryptocurrencies using event study method. According to a study by Cheah & Fry (2015), there is no fundamental value (intrinsic value) for cryptocurrency and speculative factors have a significant impact on the price of the cryptocurrency. Our study examines the determinants of the price of cryptocurrency by paying attention to three different situations: regulatory risk, mass media exposure and new listing. As a result, this study demonstrates that the price of cryptography is influenced by the increase in confidence according to mass media exposure. In addition, this study examines that increasing the number of potential users (investors) can positively affect the price of the cryptocurrency. According to the empirical results, the increase in the regulatory risk of the Korean government does not significantly affect the cryptocurrency market. In contrast, the increase of the trust according to the international mass media exposure positively affects the price of the cryptocurrency. It could lead to price increases of 1-8%. These empirical results are consistent with our hypothesis that the increase and decrease of the recognition and trust of the potential investors in the cryptocurrency is an important factor in determining the price of the cryptocurrency. The empirical results of this study are summarized as follows. Although the price of cryptography was expected to be very sensitive to the regulatory risks of a particular country, it was found that only the market of the country in question did not respond differentially due to the nature of the globalized cryptocurrency market. However, international mass media such as CNBC may affect the price of the cryptocurrency because of increasing the level of trust. This implies that changes in intangible value, such as awareness, can affect the price of cryptocurrency by exposure to mass media. Finally, in this study, we examined the effect of new listing on the Korean cryptocurrency exchange, such as Bithumb and Upbit, and find that the price increase occurred before and after the new listing of the cryptocurrency. The limitations of this study are that the number of previous studies on the determinants of cryptocurrency has not yet been enough and it is very difficult to standardize the characteristics of each cryptocurrency. Although several cryptocurrency exchanges provide a white paper on cryptocurrency, it is difficult to use it as a control variable because the content of the white paper is not standardized. In order to facilitate the subsequent empirical analysis, it will be necessary to attempt to collect and standardize the basic characteristics of cryptocurrency and to use them as control variables for cryptocurrency pricing.