• 한국식품조리과학회지
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• 제29권4호
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• pp.425-437
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• 2013

This study conducted a questionnaire survey of the current use status of central kitchen products on 198 dietitians and cooks working at a catering center of a company affiliated with group S in order to investigate the use state of the central kitchen products in catering. The largest groups of respondents answered that they use the central kitchen products once two to four days. As a reason to use it, the largest group answered that they used it because of the ease of preparation. In addition, the results show that the subjects often use sauce and processed vegetables among the central kitchen products. This study investigated the efficiency of cooking, hygiene and safety management of the central kitchen products. The results show that they have a large effect on shortening the cooking time. The quality control and service efficiency of the central kitchen products showed a positive reaction to the menu diversification and excellent quality but a negative reaction to the nutritious superiority. The operating cost efficiency of the central kitchen products generally showed a negative reaction except for the reducing effect of waste rate. As an improvement of the central kitchen products, the survey shows that the reduction in price and quality progress should be most urgently improved. Based on these results, the introduction of the central kitchen products into to the catering enables to standardize mass production, improve the taste and quality, cook without professional chefs and produce productivity increasing effect in the catering by the time shortening effect.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2002년도 추계학술대회 논문집 전력기술부문
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• pp.127-130
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• 2002

Recently, with the increasing use of power semiconductors and microprocessors which are very sensitive to little change of power quality and for coping positively with anticipating power quality disputes between power providers and consumers which are possible to occur by of power market being formed, the power quality problem has gained preponderance among the contemporary research areas. To serve these purposes, the integrated system has been researched and developed for power quality analysis and monitoring, which provides speedy and powerful functions by the growth of computer hardware and information technology. But the advent of fast and lower price hardware make little difference in an application on many systems. As a result, the key issues of constructing power quality monitoring system are in the management of data obtained, accurate algorithms, graphic representation and user-friendly-environment for easy and clear analysis results. So, in this paper it will be introduced that the standard of user-friendly-GUI(Graphic User Interface) and analysis graphic representation for intuitive understanding of results from power quality analysis based on consideration of several systems currently being in use.

• 생태와환경
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• 제40권1호
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• pp.31-39
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• 2007

본 연구에서의 대상 저수지로 유입되는 유역 내의 토지이용은 산림과 농경지가 대부분인 전형적인 농촌유역 특징을 갖고 있다. 토지이용과 수질간의 상관관계를 분석한 결과 밭에서는 모두 양의 상관관계를 나타내고 있으며, 모두 유의 수준 1%이내의 높은 상관성을 나타내었다. 주거지역은 수질과 양의 상관성을 갖는 것으로 나타나서 수질에 악영향을 미치는 것으로 평가할 수 있다. 이는 주거지역의 정화조 유출이나 처리되지 않고 유입되는 불 명수에 의한 수질오염이 원인이라고 판단할 수 있다. 본 연구대상의 48개 농업용 저수지의 수질은 크게 오염되지 않은 상태이며, 주거지역의 점유율이 상당히 낮은 수준이었으나, 주거지역과 수질과는 양의 상관성이었고, 생활하수에 의한 수질오염이 심각한 상태이었다. 밭의 경우는 상관분석 결과, 건기, 우기에서 모두 유의수준 1%이내의 양의 상관관계를 나타내고 있어 수질에 좋은 않은 영향을 미치는 것으로 평가되었다. 밭에서 많은 양의 토사가 유출되는데, 그 자체가 오염물질이고, 토사에 흡착된 오염물질들이 토사로 인해 이동하게 된다. 또한 밭이 여러 가지 작물을 연중 재배하기 때문에 많은 시비로 공급된 질소성분이 강우와 함께 유출, 침투되어 수질오염을 야기하는 것으로 사료되었다. 산지의 경우는 건기와 우기에서 모두 음의 상관관계를 나타내고 있으며, 모두 유의 수준 1%에서 음의 상관성을 갖는 것으로 평가되었다. 따라서 저수지로 유입되는 유역에서 산림의 비중이 높은 지역은 다른 지역에 비해서 저수지 수질을 관리하는데 유리할 것으로 나타났으며, 산림은 오염물질을 배출하는 오염원이기보다는 수질개선에 도움을 주는 토지 이용으로 평가되었다. 본 연구에서 논의 경우도 저수지의 수질에 좋지 않은 영향을 주는 것으로 평가되었는데, 대상 농업용 저수지가 위치 특성상 대부분 관개를 목적으로 유역의 상류에 조성되어 있기 때문에 상대적으로 깨끗한 수질에 적은 발생부하량에도 민감하게 양의 상관관계를 나타낸 것으로 판단된다. 이러한 현상은 물관리를 통해 시비하는 기간의 유출을 최소화하고, 논둑을 이용하여 오염부하량이 큰 초기 강우를 저류하는 특징을 적극 활용하는 등 논의 오염부하를 적절한 관리방법을 도입하면 농업용 저수지의 수질에 유익하게 작용할 수 있을 것으로 판단된다.

• 한국콘텐츠학회논문지
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• 제14권3호
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• pp.352-360
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• 2014

본 연구는 소셜커머스와 온라인 쇼핑몰에 대한 소비자의 수용의도와 추천의도가 어떤 요인에 의해 영향을 받는지 살펴보고자 한다. 전자상거래 및 소셜커머스 분야의 선행연구를 토대로, 지각된 유용성, 지각된 용이성, 지각된 서비스품질, 지각된 위험 등의 4가지 요인을 외생변수로 도출하여 수용의도와 추천의도를 종속변수로 선정하고 연구목적을 달성하기 위하여 연구모형과 가설을 설정하였다. 연구결과를 요약하면 다음과 같다. 첫째, 지각된 유용성과 지각된 서비스품질은 소셜커머스와 온라인 쇼핑몰에서 모두 수용의도와 추천의도에 정(+)의 영향을 미치는 것으로 확인되었다. 둘째, 지각된 위험은 소셜커머스와 온라인 쇼핑몰에서 모두 수용의도와 추천의도에 부(-)의 영향을 미치는 것으로 검증되었다. 셋째, 지각된 용이성은 온라인 쇼핑몰에서 수용의도에 영향을 미치지 않은 것으로 나타나는 반면에 소셜커머스에서 수용의도에 정(+)의 영향을 미치는 것으로 확인되었다. 본 연구결과를 토대로 소셜커머스 분야의 실무운영자들에게 소셜커머스 운영에 필요한 다양한 시사점을 제시하였다.

• 품질경영학회지
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• 제47권4호
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• pp.755-765
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• 2019

Purpose: Chatbots are widely diffusing across various industries to substitute human manpower in the industry. However as researchers only develop technology that is applied to chatbot, the diffusion is slow in progress. The purpose of this study is to propose useful implications to accelerate diffusion of chatbots across industries by analyzing the perception of customers. To achieve the research purpose this study analyzes causal effect relationship between characteristics of chatbot character, service quality, individual difference, and intention to use chatbot. Methods: This study developed a survey that contains various questionnaires for each construct based on literature review. Data collected through survey was tested for convergent validity and discriminant validity and further analyzed the relationship using PLS-SEM method to verify hypotheses. Results: Trustworthiness of the chatbot character, ease of use, application design, responsiveness, customization, assurance, inertia, and previous experience have significant influence on forming user satisfaction, consumer trust, and intention to use. The others, likability, appropriateness, technology anxiety, and need for interaction were not significant in this research. Conclusion: Although the constructs of the research model was significant in previous literatures, some do not have significant effect on intention to use chatbots. Based on the results, chatbot managers will be able to develop chatbot systems which are more appealing to users and more academic researchers will focus on analyzing user perception and intention.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2004년도 학술대회지
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• pp.55-58
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• 2004

This paper investigated the results of quality of concrete using mixed sand with grading adjustment in order to find out the applicability of fine aggregate with bad grading, According to test results, fluidity of concrete with fine level grading river sand was decreased while with coarse level grading crushed sand increased compared with that with medium level grading crushed sand. Use of mixed sand with grading adjustment(MSG) resulted in an improvement in fluidity. Increase in fineness modulus led to an increase in bleeding, For compressive strength, use of MSG increased compressive strength. For drying shrinkage, use of fine level grading river sand resulted in an increasing drying shrinkage due to the larger presence of fine particles, while use of MSG led to a reduction in drying shrinkage

• 상하수도학회지
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• 제36권5호
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• pp.289-296
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• 2022

Mangyeong River and Dongjin River are highly dependent on external regions for domestic and agricultural water, and the agricultural water supply and use system of those rivers are very complicated. For smooth water supply, rivers are used as a supply system. Of the total river water use permits (as of 2019), agricultural water accounts for 97.5%, 80.4% in Mangyeong River and Dongjin River, respectively. The excessive intake of river water as agricultural purpose is causing the stream to dry out and to deteriorate the ecological health of the river. It is necessary to minimize the water use system that takes in and utilizes river water. In both rivers, the flow rate of agricultural drainage and the load of major water quality items that flowing into the main stream are similar to or higher than those of the major tributaries, indicating that management is necessary to improve the water quality of the river. It is necessary to understand the effect of agricultural drainage on river water quality by establishing a continuous monitoring system for the form of agricultural drainage.

• 한국지하수토양환경학회:학술대회논문집
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• 한국지하수토양환경학회 2002년도 추계학술발표회
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• pp.277-279
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• 2002

In late of the 1980's, dramatic increase in water use caused over-exploitation of groundwater and deterioration of water quality in urban areas. To monitor quantity of groundwater resources and their qualities, local groundwater monitoring networks were established. Groundwater resources in urban areas are affected by various human activities including underground building construction (subway), pumping for water use, and pavements. Detailed analysis of the monitored groundwater data would provide some good implications for optimal and efficient management for groundwater resources in the urban area.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2007년도 추계학술대회 논문집
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• pp.172-178
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• 2007

The purpose of Railroad Vehicles License Management in accordance with the Railroad Safety Law is to improve the quality of railroad safety. And the train simulators come into use for training of train operation and testing to issue Railroad Vehicles License. So, It is very important that the simulators for the Railroad Vehicles License Test require to work correctly, to measure driver's operation quality in numerical system and to ensure the justice of license test. In fact, nobody can guarantee that the simulators are feasible performance to use in license test. The simulator for train driver license test can be used effectively for studying of needed performance and quality to test new driver's skill. This study hopefully provides the base for improving the quality of the simulator for train driver's license test and contributes furthermore to improve the simulator development technology and railroad safety.

• 한국건축시공학회지
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• 제8권4호
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• pp.87-93
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• 2008

With an increased use of alternative aggregate due to exhaustion of quality aggregate resources, the amount of used crushed aggregates have been increased and as a result, development of admixture materials has also been improved and its amount of use is increasing from day to day in order to secure quality in concrete. Accordingly, the purpose of this study is to make concrete of good quality by using chemical admixture developed in this study by replacement rate of fine aggregate. At first, susceptibility, compressive strength ratio and length change ratio in both fresh and hardened concrete were evaluated according to corresponding regulation. As for high performance related regulation, APC NO.3 and PC series were going to rule, and as for AE agent regulation, replacement ratio of fine aggregate of high performance chemical admixture was 10:0 and other chemical admixture met quality regulation for AE agent.