• 대한기계학회논문집B
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• 제32권8호
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• pp.629-635
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• 2008

Recently, microturbines have received attention as a small-scale distributed power generator. Since the exhaust gas carries all of the heat release, the microturbine CHP (combined heat and power) system is relatively compact and easy to maintain. Generating hot water or steam is usual method of heat recovery from the microturbine. In this work, a heat recovery unit producing hot water was installed at the exhaust side of a 30 kW class microturbine and its performance characteristics following microturbine power variation was investigated. Heat recovery performance has been compared for different operating conditions such as constant hot water temperature and constant water flow rate. In particular, the influence of water flow rate and hot water temperature on the recovered heat was analyzed.

• 대한전자공학회논문지TC
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• 제37권10호
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• pp.18-25
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• 2000

본 논문에서는 ATM망에서의 UBR 서비스를 이용한 네트워크 구성에서의 TCP 혼잡 제어 알고리즘에 따른 성능 분석을 하였다. TCP 혼잡 제어 알고리즘에는 Slow Start, Congestion Avoidance, Fast Recovery, Fast Retransmit등으로 이루어져 있다. TCP Reno, TCP Vanilla을 사용하여 ATM-UBR 서비스 망을 구축하여 성능을 비교 분석하였다. 그러나 Fast Retransmit, Recovery 알고리즘의 특성에 의하여 다중 패킷 손실이 발생할 때의 ATM-UBR 네트워크에서도 성능 저하 현상이 현저하게 발생하였다. 이러한 현상에 대한 해결책으로 본 논문은 새로운 Fast Retransmit, Recovery 알고리즘을 제시하여 성능을 개선하였다.

• 한국전자파학회:학술대회논문집
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• 한국전자파학회 2005년도 종합학술발표회 논문집 Vol.15 No.1
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• pp.191-196
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• 2005

A low-cost, high-performance 40 Gb/s clock recovery module using a phase-locked loop(PLL) for a 40 Gb/s optical receiver has been designed and implemented. It consists of a clock recovery circuit, a RF mixer and frequency discriminator for phase/frequency detection, a DR-VCO, a phase shifter, and a hold circuit. The recovered 40 GHz clock is synchronized with a stable 10 GHz DR-VCO. The clock stability and jitter characteristics of the implemented PLL-based clock recovery module has shown to significantly improve the performance of the conventional open-loop type clock recovery module with DR filter. The measured peak-to-peak RMS jitter is about 230 fs. When input signal is dropped, the 40 GHz clock is generated continuously by hold circuit. The implemented clock recovery module can be used as a low-cost and high-performance receiver module for 40 Gb/s commercial optical network.

• 설비공학논문집
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• 제24권12호
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• pp.875-880
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• 2012

The field of the large volume heat exchanger for wasted heat recovery ventilation system is being expanded enormously seeing as the fact that the quantity of reducing energies are huge due to the large volume heat exchanger for wasted heat recovery system at large buildings and factories, which consume large amount of energies while it has been arising huge amount of losses in Korea because of the lack of technology. To develop large volume waste heat recovery heat exchanger, rotor type heat exchanger was simulated for the surface corrugation. Based on the simulation results produced $30,000m^3/h$ grade waste heat recovery, heat exchanger was performed for the actual experiment. In addition, performance tests exceed the capacity of a large waste heat recovery heat exchanger performance test methods proposed.

• 설비공학논문집
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• 제26권11호
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• pp.541-546
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• 2014

The present study was conducted to determine whether ESCO Business is success or not. ESCO Business recovers the investment costs by the energy savings resulting from complementing existing energy facilities. The guaranteed parameters are Quantity of Heat Recovery, and Generator output drop. The results of the Performance Test show that the Quantity of Heat Recovery increased by 11.52 Gcal/h, and Generator output decreased by 0.234 MW, which satisfied the guarantee value.

• 한국정보시스템학회지:정보시스템연구
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• 제24권1호
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• pp.169-191
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• 2015

Green supply chain management(GSCM) has emerged as an organizational system which helps organizations and their parter to achieve corporate profit by reducing environmental risk and cost. The main objective of this study is to investigate the relationship among organizational factors(manager support and organizational learning), GSCM practices(investment recovery and eco-design) and GSCM performance based on the BSC. Using a sample of 125 Korean companies, path analysis is used to test the research model. The results shows that the manager support has a positive effect on the investment recovery and eco-design. The results also suggest that the organizational learning directly affect the investment recovery, but do not affect the eco-design. The investment recovery and eco-design have effect on the GSCM performance. In addition, the competitive pressure has moderating effects on most of the relationships between the organizational factors and GSCM practices. This findings provides useful insights for managers seeking to adopt GSCM practices, and also provide useful guidelines for researchers to study GSCM performance.

• 간호행정학회지
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• 제18권4호
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• pp.434-441
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• 2012

Purpose: The purpose of this study was to identify perception of recovery, self-esteem, role performance, job satisfaction and factors influencing job satisfaction of psychiatric mental heath nurses. Methods: Data were collected from 161 psychiatric nurses from G city & J province who understood the purpose of the study and agreed to participate. Data were analyzed using descriptive statistics, t-test, Pearson correlation coefficient, and multiple regression with SPSS 18.0. Results: There were significant differences in job satisfaction between upper 25% and lower 25% group for perception of recovery, self-esteem, and role performance. Results from the multiple regression analysis revealed difference in the related factors and in the magnitude of the relationship evaluated by standardized beta coefficients. Significant factors, listed by the magnitude of beta coefficients, were role performance, self esteem, roles and responsibilities in recovery, expectations regarding recovery in perception of recovery. These variables accounted for 16% of job satisfaction. Conclusion: Results indicate that to improve psychiatric nurses' job satisfaction, there is a need to develop programs including personal qualities and perception of recovery. Further research is necessary in order to establish consensus on roles of the related factors of job satisfaction.

• 디지털융복합연구
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• 제14권4호
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• pp.267-276
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• 2016

본 연구는 모바일 소셜 커머스에서 서비스 회복 노력의 공정성이 대고객 관계성과에 미치는 영향을 실증적으로 분석하였다. 이를 위하여 인지적 신뢰, 감정적 신뢰와 함께 서비스 회복 후 만족을 대고객 관계성과로 규정하였으며, 모바일 소셜 커머스에서 서비스 실패를 경험한 소비자들을 대상으로 한 설문조사 결과를 토대로 구성개념들 간의 관계를 공분산구조모형 분석을 통하여 확인하였다. 가설검증 결과, 서비스 회복 노력의 공정성 3가지 모두는 인지적 신뢰에 유의한 영향을 미치는 반면, 감정적 신뢰에는 절차 공정성만이 긍정적인 영향을 미치는 것으로 나타났다. 또한 인지적 신뢰와 감정적 신뢰는 회복 후 만족에 유의한 영향을 미치는 것으로 밝혀졌다. 본 연구결과는 전자상거래 분야의 연구에서 최근 각광받고 있는 모바일 소셜 커머스를 대상으로 서비스 실패를 경험한 고객들과의 관계유지 및 개선을 위한 시사점을 제공하고, 서비스 회복 노력의 성과인 회복 후 만족을 향상시킬 수 있는 유용한 전략으로 활용될 것이다.

• 한국조리학회지
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• 제18권2호
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• pp.118-133
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• 2012

본 연구의 목적은 국내 호텔의 접객 직원을 대상으로 하여 핵심자기평가, 서비스 회복 행동, 직장만족 그리고 이직의도의 구조적 관계를 분석함으로써 서비스 회복 행동을 보다 성공적으로 수행하게 하고, 직장만족을 높이며, 이직의도를 감소시키는 주요 요인을 규명하는 것이다. 이를 통하여 호텔의 인사관리에 효율적인 방안을 제시하고자 하였다. 본 연구를 위하여 수집된 자료를 실증적으로 분석하기 위하여 SPSS(10.0)와 AMOS(4.0) 프로그램을 활용하였으며, 빈도분석, 기술통계분석, 신뢰도 분석, 확인요인분석, 상관관계분석 그리고 공분산 구조 분석을 실시하였다. 그 결과, 핵심자기평가는 서비스 회복 행동에 정(+)의 영향이 있는 것으로 검증되었다. 또한 서비스 회복 행동은 직장만족을 높이는 것에 효과적인 요인이라는 것이 확인되었으며, 이직의도와는 관계가 없는 것으로 나타났다. 직장만족은 이직의도에 부(-)의 영향이 있는 것으로 확인되었다.

• 설비공학논문집
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• 제24권3호
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• pp.240-246
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• 2012

The supply and use of exhaust heat recovery ventilation system as effective energy saving equipment has been increasing steadily. The exhaust heat recovery ventilation system can be installed at ceiling of balcony or emergency space. However, ventilation system can not be installed at emergency space because where have to remain as empty space by law. Therefore, the proper installation space of ventilation system is needed. In this study, to install heat recovery ventilation system in the light weight wall, thickness of heat exchanger was assembled below 140 mm. One or two paper heat exchangers were installed in the ventilation system. The efficiency of heat recovery was analyzed through performance experiment on case of cooling and heating mode.