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Performance Test of a R134a Centrifugal Water Chiller
Jinhee Jeong,Pil-Hyun Yoon,Ghil-Yeung Kim,Hyeonkoo Lee 대한설비공학회 2002 International Journal Of Air-Conditioning and Refr Vol.10 No.2
A centrifugal water chiller using alternative refrigerant R134a has been developed. The prototype was designed to have refrigerating capacity of 300 RT. Its compressor employs a single high-speed impeller, airfoil diffuser and collector. Newly developed, enhanced tubes were installed in the evaporator and the condenser to reduce the required head for the compressor. Off-design characteristics at various conditions, performance test of the compressor and analysis of the refrigeration cycle were performed. So the probability of use in part load condition was checked and the direction for revision was suggested.
Jinhee Kwon(Jinhee Kwon),Eun-Jeong Han(Eun-Jeong Han),Hyun Ki Kim(Hyun Ki Kim) 한국노인간호학회 2023 노인간호학회지 Vol.25 No.2
Purpose: The purpose of this study is to confirm how the income level of the family caregivers for recipients in long-term care (LTC) facilities are related to family caregivers’ willingness to pay out-of-pocket payments for better LTC services. Methods: This study used the 2021 survey data on cost sharing in LTC facilities, which surveyed 1,111 family caregivers of recipients. To analyze the effect of the income level of family caregivers on the willingness to pay out-of-pocket payments for better LTC services, a chi-square test, a Cochran-Mantel-Haenszel test, and a logistic regression analysis were performed. Results: We found that 39.0% of respondents were willing to pay out-of-pocket payments if better services were available to recipients. Adjusted for recipient’s and family caregivers’ variables, characteristics of out-of-pocket payment, and LTC service use, the willingness to pay in the monthly household income level of 5 million won and more was 3.28 times higher than those in the monthly household income level of less than 1 million won (95% confidence level=1.93~5.55, p<.001). As monthly household income rises, the odds ratio of willingness to pay tended to increase (p<.001). Conclusion: Family caregivers who bear the out-of-pocket payments of LTC facilities are willing to pay more for better LTC services. In addition, the higher the income level of family caregivers, the higher their willingness to pay. A full-scale review of the system reform is needed to prevent out-of-pocket payments from becoming an economic barrier to service users and to contribute to service quality improvement and financial stability.
Series Design of Compressors for Two-Stage Centrifugal Chiller
Jinhee Jeong,Hyeonkoo Lee 대한기계학회 2003 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.17 No.2
A preliminary series design of compressors for a two-stage centrifugal chiller is suggested.Six groups of hydrodynamically similar compressors, ranging from 233RT to 1,200RT, are introduced. Flow rates, impeller diameters, and wheel speeds for each group are determined from hydrodynamic similarity to share impellers of adjacent groups. It is expected that these compressors can have the same performance and efficiency from the smallest model to the largest one.<br/>
당본풀이로 당본풀이 읽기 -제주 <세화 본향당 본풀이>의 사례-
정진희 ( Jeong Jinhee ) 한국고전문학회 2018 古典文學硏究 Vol.53 No.-
이 글은 제주 세화 본향당의 세 신격에 대한 본풀이 각각을 제주 당본풀이의 전형적, 유형적 서사에 견주어 살핌으로써 <세화 본향당 본풀이>를 당본풀이 서사의 일반성과 특수성이라는 맥락에서 고찰한 것이다. 세화 본향당의 본풀이는 본향당의 근본이 천잣도에 있음을 확인하는 <천잣도 본풀이>를 토대로, 입도 여신 백주의 좌정 서사를 통해 초월성을 지닌 외부의 여성 신격이 본향당신과 위계적 관계로 내부화되는 양상과 논리를 드러내는 <백줏도 본풀이>, 외부에서 축출당해 입도한 금상의 좌정 및 돗제 설행 서사를 통해 외부의 장수신을 수용하여 내부화하는 양상과 논리를 드러내는 <금상님 본풀이>로 구성되어 있음을 보였다. 송당 본향당 본풀이와의 영향 관계에 천착해 온 선행 연구의 시야를 확장하여, <세화 본향당 본풀이>는 제주도 당본풀이의 일반적 서사 관습을 활용하고 변주하면서 신앙 대상의 확대에 따른 수용과 조정의 신화적 논리를 구성해 간 본풀이임을 주장했다. 제주 당본풀이의 일반적 서사 체계나 관습을 통해 개별 당본풀이를 읽을 때, 특정 당본풀이의 의미가 보다 잘 드러날 수 있음을 보였다는 데에서 이 글의 의의를 찾을 수 있다. The present study examines Sehwa Bonhyangdang Bonpuri (stories or songs of the origins of the guardian deities worshipped at the Sehwa village shrine) in the context of both the generality and particularity of the narratives of Jeju Island’s dang bonpuri (stories or songs of the origins of village guardian deities). It focuses on the bonpuri (stories or songs of the origins of deities) concerning the three deities worshipped at the Sehwa village shrine and examines these three bonpuri in comparison with both the typical and general patterns in the island’s dang bonpuri. The Sehwa Bonhyangdang Bonpuri consist of: Cheonjatto Bonpuri, which confirms that the origin of the Sehwa village shrine lies in Cheonjatto; Baekjutto Bonpuri, which, through a narrative of settlement by Baekju, a goddess who has entered the island, reveals the patterns and logic of the internalization of an external female deity imbued with transcendence in a hierarchical relationship with Cheonjatto already worshipped at the Sehwa village shrine; and Geumsangnim Bonpuri, which, through a narrative of settlement and performance of dotje (shamanic sacrificial rites where an entire pig is offered) by Geumsang, who has been expulsed from his original abode outside and entered the island, reveals the logic of the acceptance and internalization of an external jangsusin (military general deity). The present study sees the Sehwa Bonhyangdang Bonpuri have been reorganized according to changes in the belief in dang (village guardian deities) based on the general narrative grammar of Jeju Island’s dang bonpuri. Contrastive discussions on other dang bonpuri from the island, which have received attention as special narratives, based on the general narrative grammar of dang bonpuri likewise are expected to be valid.
공동주택의 기밀성능 및 기존 설비에 따른 실내 라돈 농도 변화
정진희(Jeong Jinhee),이윤규(Lee Yun Gyu) 한국태양에너지학회 2023 한국태양에너지학회 논문집 Vol.43 No.6
Among various indoor air pollutants, radon is a ubiquitous and imperceptible substance that has long-term harmful effects on the human body; however, it can be effectively removed through indoor/outdoor air exchange. In this study, we collected data on the variations in indoor radon levels caused by airtightness performance, window opening, and bathroom exhaust fan operation. The levels of indoor radon fluctuated more irregularly in less airtight conditions, while the highest concentrations were observed in an apartment house with good airtightness performance (<1.5 ACH50). Opening the windows to allow for cross ventilation during the first hour of the experiment significantly increased the removal efficiency. The percentage of removal increases as the size of the window opening increases. Nevertheless, accidental variations in ventilation volumes brought on by weather-related factors, such as wind, temperature, and air pressure, makes this unmaintainable. The indoor radon levels of the entire apartment house did not significantly change when the bathroom exhaust fan was operating. Smaller areas, such as a single bedroom, can have their indoor radon concentrations reduced to less than 100 Bq/㎥. This implies that in situations where the ventilation system is inadequate, the bathroom exhaust fan can function as a substitute instrument.