• Journal of fish pathology
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• v.35 no.2
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• pp.167-176
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• 2022

We injected infectious myonecrosis virus (IMNV) to pacific whiteleg shrimp, Litopenaeus vannamei, and observed closely with using light microscope and transmission electron microscope (TEM) for 4-8 days post infection (dpi). As clinical signs, abdominal bodies had mild opaque muscles at 5 dpi. And the mortality was shown at 6 dpi. At 8 dpi, most injected shrimps had severe opaque muscles and humped back that cause of movement disorder. As results of histopathological examinations, local parts of abdominal body muscle had muscle fiber hyalinization, muscle fiber atrophy, rounded muscle fibers, myofibrillar hypertrophy in size, a decrease in number of myofibrils and phagocytosis from the sarcolemmas by multiple hemocytes at 4 dpi. Especially, myofibrillar hypertrophy appeared at the whole or random part of single muscle fiber not in specific locations like the center or edge of muscle fiber. At 6-7 dpi, multiple muscle necrosis, muscle fiber segmentation, myofibril lysis ap- peared and a few hemocytes were infiltrated at lesions. At 8 dpi, extensive muscle necrosis, multiple myofibril lysis and muscle fiber atrophy were shown, and very few hemocytes were infiltrated. In early stage of infection, local viral myositis with zenker's degeneration were shown. These lesions appeared multiply after the early stage. In late stage of infection, extensive coagulative muscle necrosis appeared with few of inflammatory response such as hemocytes infiltration. The lack of hemocytes infiltration response at the late stage might be disadvantage for Litopenaeus vannamei to defense against IMNV and to recover, because hematocytes (granulocyte, semi-granulocyte) eliminate pathogen and damaged tissues from infection sites and help recover. As results of the TEM observation, IMNVs that had nonenveloped icosahedral capsid which was 30-40 nm diameter were in myofibril and beside tubules of sarcoplasmic reticulum and moved to the certain direction. The micro-tears and micro-trau- mas in myofibrils caused muscle fiber necrosis. And semi-granulocytes engulfed IMNVs to eliminate virus.

• Culinary science and hospitality research
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• v.6 no.2
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• pp.271-290
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• 2000

The objectives of this study were to develop program in education & training of dietitians and cooks in contracted foodservice management company, The instruments were developed by reviewing extensive literatures on education programs and by interviewing with dietitians and cooks who were working in contracted foodservice management company. A total of 400 questionnaires was hand delivered at 14 contracted foodservice management companies by designated coordinators. A total of 286 questionnaires was usable; resulting in a 70.0%, response rate. Statistics data analysis was completed using the SPSS program for frequency analysis, reliability, mean value, t-test, ANOVA and Crohnbach's alpha coefficient. Crohnbach's alpha coefficients for dietitian's scale and cook's scale were 0.9548 and 0.9513. A few things were suggested according to the results of the survey: 1. The dietitians and the cooks wanted to take a continuing education to improve their job. Therefore the contracted foodservice management company should provide them with the systematic education according to their job experience. 2, As the continuing education for dietitians and the continuing education for cooks were disappeared, Korean Dietitian Association and Korean Culinary Association should make a certified continuing education program and give them a new knowledge and a changeable food culture.

• Journal of the Korean Society of Safety
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• v.31 no.4
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• pp.27-34
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• 2016

Process Safety Management (PSM) system was introduced since 1996 and it makes voluntarily organizing and managing chemical accident prevention system by company itself that contributes to reduce the chemical accidents. However, large or small scaled chemical accidents had occurred frequently in these days. This trend is brought up the necessity to analyze and improve PSM system. In this study, it was conducted by the questionnaire survey and workshop for prevention of major industrial accidents in PSM sites in order to collect extensive opinions from all walks of life and identify overall operation condition. It was proposed to establish improvement plan of implementing condition assessment in PSM system. By results of the study, company's voluntary safety management will be induced by improved PSM system and management plan and it expects to prevent the major industrial accidents.

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• autumn
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• pp.468-471
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• 2001

The importance of early project planning is broadly recognized for construction projects. From the planning step, If extensive historical data related with the project is applied effectively, It can be major resource for estimating cost and project scope. However, The accumulation, analysis, and application of historical data is not sufficient in Korea. So useful information of construction project has disappeared. In order to solve the problems, Project Historical Data Management Systems is need to be developed. The purpose of this study is to analyze current problems and to find the method to utilize historical data in similar project.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2014.10a
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• pp.561-564
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• 2014

In this paper a photovoltaic energy harvesting charger with battery management circuit is proposed. The proposed circuit harvests maximum power from a solar cell by employing MPPT(Maximum Power Point Tracking) control and charges an external capacitor battery with the harvested energy. The charging state of the battery is controlled according to the signals from the battery management circuit. The proposed circuit is designed in a 0.35um CMOS process technology and its functionality has been verified through extensive simulations. The maximum efficiency of the designed entire system is 84.8%, and the chip area including pads is $1350um{\times}1200um$.

• Proceedings of the Korea Water Resources Association Conference
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• 2015.05a
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• pp.216-216
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• 2015

Frequent hydro-meteorological events caused by global climate change and human exacerbate activities, make the water resource problem more complicated. The increasing speed urbanization brings a significant impact on the city flood control and security, water supply safety, water ecological security, water environment safety and the water engineering security in China, and puts forward higher requirements to urban water integrated management, undoubtedly which become the biggest obstacle for water ecological civilization construction, thus urgent requiring an advanced methods to enhance the effectiveness of the water integrated management. The other fields of smart ideas point out a development path for water resource development. The construction demand of smart water resource is expounded in the paper, combining the philosophy of modern Internet of things with the application of cloud computing technology. The concept of smart water resource is analyzed, the connotation characteristics of smart water resource is extracted, and the general model of smart water resource is refined. Then, the frame structure of smart water resource is put forward. The connotation and the overall framework of the smart water resource represent a higher level of water resource informationization development and provide a comprehensive scientific and technological support to transform water resource management from an extensive, passive, static, branch and traditional management to a fine, active, dynamic, collaborative and modern management.

• International conference on construction engineering and project management
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• 2022.06a
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• pp.94-102
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• 2022

Construction workers are engaged in many activities that may expose them to serious hazards, such as falling, unguarded machinery, or being struck by heavy construction equipment. Despite extensive research in building information modeling (BIM) for safety management, current approaches, detecting safety issues after design completion, may limit the opportunities to prevent predictable and potential accidents when decisions of building materials and systems are made. In this respect, this research proposes a proactive approach to detecting safety issues from the early design phase. This research aims to explore accident precursors and integrate them into BIM for tracking safety hazards during the design development process. Accident precursors can be identified from construction incident reports published by OSHA using a text mining technique. Through BIM-integrated accident precursors, construction safety hazards can be identified during the design phase. The results will contribute to supporting a successful transition from the design stage to the construction stage that considers a safe construction workplace. This will advance the body of knowledge about construction safety management by elucidating a hypothesis that safety hazards can be detected during the design phase involving decisions about materials, building elements, and equipment. In addition, the proactive approach will help the Architecture, Engineering and Construction (AEC) industry eliminate occupational safety hazards before near-miss situations appear on construction sites.

• The Journal of Society for e-Business Studies
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• v.9 no.1
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• pp.221-235
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• 2004

Many organizations are implementing Knowledge Management(KM) technologies to promote knowledge sharing. An extensive review of recent articles and journals about such implementations reveals that one of the main barriers to implementation of KM technology is the absence of an organizational culture that supports knowledge sharing. The purpose of this research is to explore the possible relationship between the successful implementation of knowledge management technology and specific organizational culture attributes. The Organizational Culture Profile(OCP) and the Knowledge Management Technology Profile(KMTP) instruments were used to identify and rank the most critical organizational culture attributes and KM technology implementation successes. Data were collected from twenty six US organizations involved in a KM efforts.

• Archives of Plastic Surgery
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• v.37 no.5
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• pp.667-670
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• 2010

Purpose: The management of urethral defect represents one of the most challenging clinical problems in uroplastic surgery. Especially for defect after Fournier's Gangrene, optimal management is still a hard problem. During extensive urethral reconstruction, to overcome the poor vascularity due to periurethral scarred tissue and limitation of the choice of local flap, we report our experience with one-stage reconstruction of urethral defect using a longitudinal tubed flap of scrotal skin. Methods: A 72-year-old man with several years of diabetes mellitus history visited for swelling and pain of scrotal area. After diagnosis of Fournier's Gangrene, radical debridement was performed and 6 cm of urethral defect on border of penile-scrotal ventral area was made. Rectangular scrotal skin flap ($6{\times}2.5\;cm$) based on external spermatic fascia was elevated and tubed longitudinally. After transfer the flap to the defect area, end-to-end anastomosis was performed bilaterally. Results: 4 weeks after the operation, the patient started voiding him-self and urethrography showed good fluence of contrast agent. Long term evaluation reveals stable performance characteristics without any complications. Conclusion: We suggest a one-stage reconstruction of extensive urethral defect using a longitudinal tubed flap of scrotal skin. Advantages of this procedures are simple, one-stage reconstruction with the reliable scrotal skin flap based on external spermatic fascial vasculature, and no donor morbidity.

• Journal of Korean Society of Industrial and Systems Engineering
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• v.38 no.4
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• pp.88-97
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• 2015

Quality management system is a systematic quality improvement approach for firm-wide management for the purpose of improving performance in terms of quality, productivity, organizational characteristics, customer satisfaction, and firm's profitability. Recently, many researchers have examined the relationship between quality management system and firm's performance. The conclusion from these studies is that effective implementation of quality management system improves firm's performance. This paper extends the existing research on quality management system and firm's performance by examining how the impact of quality management system on firm's performance is moderated by organizational characteristics and customer satisfaction. The paper is organized as follows. Section 1 introduces the necessity and purpose of the research. Section 2 reviews quality management system and summarizes the results of previous studies. Section 3 present the proposed research model, the hypotheses related to the relationship between quality management system and firm's performance. Section 4 provides results from the data analysis. Section 5 presents discussions, results, further implications, and research limitations. An extensive literature research was designed to identify and retrieve empirical studies relevent to develop the hypotheses. The objectives of this study identify the factors of quality management system on business performance. The results are as follows: First, The management responsibility, resource management and product realization influenced significantly on financial performance. The management responsibility and product realization influenced significantly on non-financial performance. Second, the research showed a fact that organizational characteristics and customer satisfaction effect as a moderated between quality management system and business performance. The implications of our results are that organizational characteristics and customer satisfaction moderate the firm's performance.