• Applied Microscopy
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• v.34 no.4
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• pp.241-254
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• 2004

Kidney had recovery functions against toxicants, ischemia, reperfusion-induced damage, acute-renal failure (ARF). Urinary epidermal growth factor (EGF) is produced by the juxtaglomerular apparatus. Kidney accumulates or excretes the EGF. In case of renal diseases, excreted EGF was decreased. The aim of this study is to evaluate the effects squalene (SQ) on the prevention of experimental acute renal failure induced by glycerol. In case of in vitro study, we investigated the expression of EGF by RT-PCR. After the proximal tubular cells was isolated, glycerol (1, 2, 4 mM) or glycerol plus squalene (0.1, 0.05 or 0.1%) was added. In case of in vivo study, we investigated the changes of BUN, creatine, and ultrastructure. Experimental groups were divided into four groups. Group 1 was normal mouse. Group 2 was injected with SQ only (180 mg/kg). Group 3 was not treated with squalene after intraperitoneal contamination of glycerol (50%, 8 ml/kg). And, Group 4 was treated with squalene (180 mg/kg) after intraperitoneal contamination of glycerol (50%, 8 ml/kg). All groups were used to 7 mice. In the results, we investigated the glycerol induced renal failure. The expression of EGF mRNA was decreased in renal proximal tubules when treated with only glycerol. SQ increased the mRNA expression of EGF in renal proximal tubules. SQ also quickly recovered the levels of BUN and creatine compared with those of mice treated with only glycerol (P<0.01). In case of ultrastructure, group 3 had heavily damaged mitochondria, but, mitochondria in group 4 had evidences of the recovery. It was concluded that SQ had the recovery effects for the glycerol-induced acute renal failure.

• Journal of Service Research and Studies
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• v.14 no.1
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• pp.1-12
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• 2024

As the service robot market grows among the food technology industry, the quality of robot service that affects consumer behavioral intentions in the restaurant industry has become important. Serving robots, which are common in restaurants, reduce employee work through order and delivery, but because they do not respond to service failures, they increase customer dissatisfaction as well as increase employee work. In order to improve the quality of service beyond the simple function of receiving and serving orders, functions of recovery effort, fairness, empathy, responsiveness, and certainty of the process after service failure, such as serving employees, are also required. Accordingly, we assumed the type of failure of restaurant serving service as two internal and external factors, and developed a serving robot with a vocational ethics module to respond with a professional ethical attitude when the restaurant serving service fails. At this time, the expression and action of the serving robot were developed by adding a failure mode reflecting failure recovery efforts and empathy to the normal service mode. And by recruiting college students, we tested whether the service robot's response to two types of service failures had a significant effect on evaluating the robot. Participants responded that they were more uncomfortable with service failures caused by other customers' mistakes than robot mistakes, and that the serving robot's professional ethical empathy and response were appropriate. In addition, unlike the robot's favorability, the evaluation of the safety of the robot had a significant difference depending on whether or not a professional ethical empathy module was installed. A professional ethical empathy response module for natural service failure recovery using generative artificial intelligence should be developed and mounted, and the domestic serving robot industry and market are expected to grow more rapidly if the Korean serving robot certification system is introduced.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.15 no.10
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• pp.6076-6083
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• 2014

Service recovery research has been conducted on the premise that service problems can be returned to the original condition. This study, however, focused on irrecoverable service problems for the first time and classified them according to the types and sub-types. The specific wants of customers who experienced unrecoverable service problems were identified by analyzing the customers' emotion, behavior pattern, and the company's responses. The results revealed three main types of problems and 2 categories in group 1, 6 categories in group 2, and 2 categories in group 3. In particular, damaged items and bodily harm were frequent problems, and bodily harm was recognized as the most severe failure. Regarding the customers' emotion, the customers were so enraged at the audacity and the company still showed many problems in terms of its response to the service failures. This study also suggested the analysis results of the customers' behavior and company evaluation.

• Culinary science and hospitality research
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• v.15 no.4
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• pp.273-285
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• 2009

In order to find how the recovery justice from the service procedure and result failure affects the quality of customer-brand relationship, we conducted this study following pre research, its correction and supplement of the customers who experienced some service failures in food restaurant. We selected the best five brands in Korean food franchise in the rank of the sales on basis of data of Korean Food Restaurant Information in year 2009. The participants of this research were the people who live in Seoul metropolitan area and ever experienced any service failure within recent 6 months. Of the 500 copies of survey questionnaires distributed, 391 were used for the analysis. The method used for this analysis was the SPSS for WIN 12.0 program and the analysis such as technical statistics analysis, reliability analysis, research element analysis and regression analysis were applied. As a result, the service shortage factor which is one of the service process failures was confirmed to affect procedural justice and distributive justice. It has been confirmed that procedural justice and distributive justice are influenced by the hygiene deficiency which is one of the result failures. It was also found that the product factor affects distribution justice. As for the effect of the quality of recovery justice and a customer-brand relationship, procedural justice and distributive justice were found to affect the mutual dependency while procedural justice affects a familiarity.

• IEMEK Journal of Embedded Systems and Applications
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• v.13 no.5
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• pp.235-243
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• 2018

NAND flash memory has been widely used for embedded systems as storage device and the flash memory file systems such as JFFS2, YAFFS/YAFFS2 have been adopted by these embedded systems. The flash memory file systems provide the high performance and overcome the limitations of flash memory. However, these file systems don't solve the slow mount time problem when a sudden power failure happens. In this paper, we proposed a flash memory management method for enhancing the recovery performance. The proposed method manages the flash memory block type and stores the block type information at recovery image block. When file operations are occurred, our method stores the file information at the metadata block before and after the file operation. When mounting the flash memory, our method only scans the recovery image blocks and metadata blocks. The proposed method reduces the mount time by seeking the metadata block locations fast by using the recovery image blocks. We implemented the proposed method and evaluation results show that our method reduces the mount time 13 ~ 46 % compared with YAFFS2.

• Journal of Electrical Engineering and Technology
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• v.13 no.1
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• pp.60-67
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• 2018

The presence of induction motor loads in a power system may cause the phenomenon of delayed voltage recovery after the occurrence of a severe fault. A high proportion of induction motor loads in the power system can be a significant influence on the voltage stability of the system. This problem referred to as FIDVR(Fault Induced Delayed Voltage Recovery) is commonly caused by stall of small HVAC unit(Heating, Ventilation, and Air Conditioner) after transmission or distribution system failure. This delayed voltage recovery arises from the dynamic characteristics associated with the kinetic energy of the induction motor load. This paper proposes the UVLS (Under Voltage Load Shedding) control strategy for dealing with FIDVR. UVLS based schemes prevent voltage instability by shedding the load and can help avoid major economic losses due to wide-ranging cascading outages. This paper review recent topic about under voltage load shedding and compare decentralized load shedding scheme with conventional load shedding scheme. The load shedding strategy is applied to an actual system in order to verify the proposed FIDVR mitigation solution. Simulations demonstrate the effectiveness of the proposed method in resolving the problem of delayed voltage recovery in the Korean Power System.

• Journal of Power System Engineering
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• v.15 no.5
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• pp.22-29
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• 2011

In this study, the damage mechanism of large scale steam turbine due to water induction was analyzed and recovery characteristics were reviewed. A turbine consists of the rotating rotor and the stationary casing, and the clearance between them is very small for the efficiency enhancement. If water induction, while relatively cold steam or water is introduced into turbine, occurs, the considerable humping is caused at the casing near the initial water induction point and that induces the rubbing between rotor and casing. Finally, it leads to the catastrophic failure. Bowed rotor has the different characteristics in the recovery depending on damage degree. The elastic deformation due to light rubbing is recovered by turning the rotor with 3 rpm under normal operation condition, but most plastic deformation due to rubbing deforms the local microstructure and that results in permanent deformation which could not be recovered under normal operation condition. Bowed rotor has diverse characteristics depending on the recovery method, and the method is empirical and needs the cutting edge technology. Careful recovery treatment of the rotor will eliminate the risks and secure the high quality rotor similar to new rotor. If any critical error is made during the recovery, the rotor would not be recovered permanently and it should be scrapped.

• The Journal of Asian Finance, Economics and Business
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• v.8 no.1
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• pp.961-970
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• 2021

This study aims to examine the impact of service recovery in building customer loyalty through the mediating role of customer satisfaction and corporate image. This study also aims to examine the reciprocal relationship between customer satisfaction and corporate image in building customer loyalty. This study uses data from 126 consumers who have received recovery for a service failure in five logistics companies which operates in Southeast Sulawesi in Indonesia, namely; JNEs; J&T Express; Pandu Logistics; MEC; and TiKi. Data was collected using a questionnaire which was then distributed to all respondents via google form. The distribution of respondents at each logistics company provider was as follows: 19 respondents were customers of JNEs; 17 respondents were customers of J&T Express; 32 respondents were customers of Pandu Logistics; 21 respondents were customers of MEC; and 37 respondents were customers of TiKi's. The structural model developed in this study was tested using Partial Least Squared (PLS) method. The research found that service recovery has a direct effect on customer satisfaction and corporate image as positive and significant. Customer satisfaction and corporate image have a reciprocal relationship which then roles in building customer loyalty. Service recovery has an indirect effect on customer loyalty through the mediating role of customer satisfaction and corporate image.

• Journal of Chest Surgery
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• v.25 no.4
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• pp.424-428
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• 1992

Post-AMI VSD is an infrequent but often catastrophic complication of acute myocardial infarction In general, the mortality is associated with end organ failure due to low output syndrome. Therefore, a stable hemodynamic is necessary to prevent the end organ failure. If a supportive therapy does not accomplish it, surgical intervention should be considered. Recently, we have experinced a case of post-AMI VSD with cardiogenic shock. Early recognition and surgical repair of post-AMI VSD gave us a good result. Postoperative result was satisfactory and recovery was uneventful. We believe that early surgical repair can be lifesaving in the case of post-AMI VSD with cardiogenic shock.

• Management & Information Systems Review
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• v.33 no.3
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• pp.59-76
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• 2014

This research tries to present the role of Jung, which is well known as Koreans' traditional emotional attachment in service recovery process. Prior research on the service recovery have focused on relationship among perceived justice, recovery satisfaction and forgiveness. Especially perceived justice including distributive, procedural, and interactional justice has addressed as most important antecedents of recovery satisfaction. Although the pivotal role of emotional factors for successful service recovery has agreed by many researchers, relatively little attention has been paid to this issue. During the service recovery process, even if customer perceived recovery effort from service provider as justice one, they might feel displeasure or dissatisfaction. It means prior researches have underestimated the importance of emotional aspect, especially for Korean perspectives. In this study, we examined customer reactions to service failure and recovery process in restaurant service settings. Specifically, we focused on the moderating effect of 'Jung' on the paths between perceived justice and outcome variables such as forgiveness and recovery satisfaction.