• 대한기계학회논문집B
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• 제20권1호
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• pp.237-243
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• 1996

Current low head and small scale hydroturbines have limitations in the minimum required head and flow rate for efficient operation. This study attempts to develop a new concept hydroturbine which is expected to run efficiently even in very low head and small flow rate, so that the limitations on the conventional small scale hydropower could be alleviated and competition with other alternative energy sources in the economic respect could be attained. A small scale catapillar track- hydroturbine was fabricated and the performance test was carried out in a water tunnel over the head range of H = 0.8 m ~ 1.26 m. The peak turbine efficiency was 41.3% at the speed ratio of 0.6, and the turbine loss was mostly due to the friction at the chain drive used for power transmission from the runner to the shafts. This type of turbine is expected to become competitive when some improvement in the power transmission mechanism is made.

• 유통과학연구
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• 제20권7호
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• pp.57-64
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• 2022

Purpose: The government of India has initiated the Covid-19 Vaccination drive from early January 2021. Vaccination is identified to be best option to protect the people across the globe. However, owing to fast wide spread of the Covid-19, the Vaccine Distribution is a major challenge owing various issues like temperature control, infrastructure, hesitancy, geographical diversity, and other critical factors. Various research is carried out globally to understand and study the Vaccine Distribution issues based on the respective country issues and factors. Research Design, Data, and Methodology: This research paper attempts to explore prominent factors that could be taken up on priority for better and effective vaccination program. The study tries to rank various factors and sub-factors affecting vaccine distribution in India. AHP methodology based on feedback from 22 experts from the Vaccine industry has been deployed to get the desired results. Result: The results show that factors vaccine approval process, geographical prioritization, power supply, infrastructure maintenance costs for vaccine storage, and vaccine pricing are the prominent factors of effective vaccination in the country. Conclusion: The role and need for district-level health officers towards vaccine storage has been brought forward. A long-term effective vaccination policy is needed for optimum vaccine distribution.

• 한국수자원학회:학술대회논문집
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• 한국수자원학회 2020년도 학술발표회
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• pp.121-121
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• 2020

Varying dominant processes, including Tropical Cyclone (TC) and non-TC rainfall events, have been known to drive the occurrence of precipitation in South Korea. With the changes in the pattern of the Earth's climate due to anthropogenic activities, nonstationarity or changes in the magnitude and frequency of these dominant processes have been separately observed for the past decades and are expected to continue in the coming years. These changes often cause unprecedented hydrologic events such as extreme flooding which pose a greater risk to the society. This study aims to take into account a more reliable future climate condition with two dominant processes. Diverse statistical models including the hidden markov chain, K-nearest neighbor algorithm, and quantile mappings are utilized to mimic future rainfall events based on the recorded historical data with the consideration of the varying effects of TC and non-TC events. The data generated is then utilized to the hydrologic model to conduct a flood frequency analysis. Results in this study emphasize the need to consider the nonstationarity of design rainfalls to fully grasp the degree of future flooding events when designing urban water infrastructures.

• 한국컴퓨터정보학회:학술대회논문집
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• 한국컴퓨터정보학회 2023년도 제67차 동계학술대회논문집 31권1호
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• pp.443-445
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• 2023

Following the global financial crisis, the global value chain contracted, and characteristics of "reverse globalization" of the economy and trade gradually emerged. This is due to the term "reverse globalization" referring to a shift away from globalization. Within a short period of time, the phenomenon known as "reverse globalization" developed as an inescapable obstacle, coinciding with the development and dissemination of the COVID-19 virus. At some time in the distant future, the "reverse globalization" of economic trade and the "globalization" of the digital economy will co-dominate the shifting trend of the global economic landscape. This will happen gradually over time. The goal of this research is to look at the minor changes that happened in the methods and techniques used by the economic mechanism known as "globalization against the flow." It employs Chinese smart manufacturing companies as a model and proposes a digital drive model to investigate the prospects and constraints of smart manufacturing technology enterprise innovation development under "reverse globalization," with the goal of establishing a digital innovation development path. The theoretical insights given in this study have the potential to serve as a reference for China as it attempts to build a new growth pattern based on a double-cycle and promote a new type of globalization.

• 식품보건융합연구
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• 제10권1호
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• pp.1-6
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• 2024

Purpose: The research aims to address the intricacies of AI and Big Data application within the food industry. This study explores the strategic implementation of AI and Big Data in the food industry. The study seeks to understand how these technologies can be employed to bolster consumer engagement and contribute to market expansion, while considering ethical implications. Research Method: This research employs a comprehensive approach, analyzing current trends, case studies, and existing academic literature. It focuses on the application of AI and Big Data in areas such as supply chain management, consumer behavior analysis, and personalized marketing strategies. Results: The study finds that AI and Big Data significantly enhance market analytics, consumer personalization, and market trend prediction. It highlights the potential of these technologies in creating more efficient supply chains, improving consumer satisfaction through personalization, and providing valuable market insights. Conclusion and Implications: The paper offers actionable insights and recommendations for the effective implementation of AI and Big Data strategies in the food industry. It emphasizes the need for ethical considerations, particularly in data privacy and the transparency of AI algorithms. The study also explores future trends, suggesting that AI and Big Data will continue to revolutionize the industry, emphasizing sustainability, efficiency, and consumer-centric practices.

• 지역과문화
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• 제8권3호
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• pp.27-48
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• 2021

近年来, 中国的旅游演艺进行了一系列新项目的落成, 使旅游演艺产业的票房增加, 经济收入增高, 同时带动了旅游演艺的品牌形成, 而且拥有了一定的良好口碑, 对地域的文化传播, 经济发展都有一定的推动作用, 其中大型情景体验剧就是重点项目之一。大型情景体验剧是一种以模拟真实环境空间设计为空间, 使观众在视觉, 听觉, 嗅觉, 味觉和触觉等多位感官上进行主动式体验, 互动性极强的新戏剧形式。大型情景体验剧根据中国的传统文化, 地域文化, 流传已久的故事进行了改编, 又结合了灯光, 音效, 特效, 3D效果等高科技, 使观众的体验更加真实。《又见平遥》作为中国第一部大型室内情景体验剧, 以新的表现形式和创作手段来体现山西文化的博大精深。以情景体验剧的形式, 使观众更加直观地感受到了"山西人"的"山西情"和"山西德", 推动山西旅游业的发展, 带动山西地区的经济, 逐渐形成了完整的产业链。但也有剧情连接不顺及游客管理不当等局限, 可以通过更多的观众互动及指引完善演出效果。因此可以看出, 大型情景体验剧对地域在传统文化, 价值观的传播上, 旅游产业的发展上, 地域的品牌特色形成以及经济发展上都有很大的推动作用。通过这些, 可以看出大型情景体验剧对实景演出的发展具有创新思维内容, 逐渐形成产业链闭环以及拓宽宣传渠道等启示作用。

• 농업과학연구
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• 제3권1호
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• pp.95-104
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• 1976

도입(導入)된 2조용(條用) Combine으로 통일(統一) 및 밀양(密陽) 15호(號) 수도품종(水稻品種)에 대(對)한 포장수확작업(圃場收穫作業)을 실시(實施)하여 Combine의 작업정도(作業精度) 작업성능(作業性能) 기계적(機械的)인 적응성(適應性)을 파악(把握)하고 한국(韓國)에서의 보급전망(普及展望)을 분석검토(分析檢討)한바 그 결과(結果)를 요약(要約)하면 다음과 같다. 1. 장간종(長稈種)인 밀양(密陽)15호(號)에 대(對)한 Combine 수확작업(收穫作業)은 수확적기(收穫適期)로 부터 13일(日) 경과후(經過後)까지 5회(回)에 걸쳐 시기별(時期別)로 수확작업(收穫作業)을 실시(實施)한바 완숙도(完熟度)에 관계(關係)없이 수확작업(收穫作業) 양호(良好)하였으며 포장손실율(圃場損失率) 1% 미탈곡율(未脫穀率) 1%로 양호(良好)한 편(便)이었다. 2. 단간종(短稈種)인 통일(統一)에 대(對)한 Combine 수확작업(收穫作業)은 완숙기(完熟期)로 부터 수확시기(收穫時期)가 경과(經過)될 수록 포장손실(圃場損失)이 Fig 1과 같은 경향으로 5.13%에서 10.34%로 증가(增加) 하였으며 통일(統一)벼 수확(收穫)을 위(爲)하여는 기계적(機械的)인 개선(改善)이 많이 요망(要望)되었다. 3. 공시(供試)된 Combine은 장간종용(長稈種用)의 기종(機種)이어서 벼 이삭의 높이가 균일(均一)치 못한 단간종(短稈種) 통일(統一)벼는 탈곡부(脫穀部)의 공급(供給) Chain과 급실(扱室)과의 거리가 커서 급동(扱胴)의 급치(扱齒)에 못미치는 부분(部分)이 있어 미탈곡립율(未脫穀粒率)이 평균(平均) 1.6%이었다. 4. Combine 탈곡부(脫穀部) 급동(扱胴)의 회전수(回轉數)(240~350R.P.M)와 동할미(胴割米)의 관계(關係)는 통일(統一) 및 밀양(密陽)15호(號) 양품종(兩品種) 모두 동할율(胴割率)이 1% 미만(未滿)으로 유의차(有意差)가 없었다. 5. 통일(統一)벼는 벼 이삭이 잎속에 들어 있어 탈곡시(脫穀時) 검불의 양(量)이 많으며 특(特)히 생탈곡시(生脫穀時)는 검불량이 더 많이 생기므로 양곡부(揚穀部) 및 배진구(排塵口)에서 폐쇄현상(閉鎖現像)이 자주 일어남으로 선별(選別) 및 배진장치(排塵裝置)의 개선(改善)이 요망(要望)된다. 6. Combine의 접지압(接地壓)은 $0.19kg/cm^2$로 Fig3과 같은 약(弱)한 지내력(地耐力)의 토양(土壤)에서 Combine의 Track이 25cm 침하(沈下)하여도 Combine의 주행(走行)은 가능(可能)하였다. 그러나 지내력(地耐力)은 지점(地点)에 따라 균일(均一)치 않아 침하(沈下)의 깊이가 균일(均一)치 못함으로 침하(沈下) 5cm정도(程度)에서는 예취(刈取) 높이의 조정(調整)없이 수확작업(收穫作業)이 가능(可能)할 것으로 인정(認定)된다. 7. 관행수확작업(慣行收穫作業)과 Combine 수확작업(收穫作業)의 경제성(經濟性)을 검토(檢討)한바 수도맥작(水稻麥作)의 연간(年間) 사용일수(使用日數)를 40일(日)로 하고 작업일수율(作業日數率) 60% 포장작업효율(圃場作業效率) 56%로 할 때 작업속도(作業速度)를 0.273m/sec로 하여 분석(分析)한바 1일작업시간(日作業時間)을 8시간(時間)으로 할 때 연간부담면적(年間負擔面積)이 4.7ha로 ha당(當) 수확작업비용(收穫作業費用)이 관행수확작업비용(慣行收穫作業費用)과 일치(一致)함으로 통일(統一)벼 수확작업(收穫作業)에 이용(利用)될 수 있도록 Combine의 기계적(機械的)인 보완개량(補完改良)이 뒤따르면 Combine의 흡착(吸着)은 경제적(經濟的)으로 타당(妥當)하다고 인정(認定)된다. 8. 장간종(長稈種)의 현(現) Combine을 통일품종수확(統一品種收穫) 작업(作業)에 이용(利用)키 위(爲)하여는 전면측방(前面側方)의 divider가 벼이식에 닿지 않도록 조절할 수 있게 하고 급동(扱胴)과 feed chain의 간격(間隔)을 좁히고 배진장치(排塵裝置)를 개량(改良)하고 수도간장(水稻稈長)에 따라 기계전후조정범위(機械前後調整範圍)를 넓히고 배수불량(排水不良)한 답(畓)에서의 이용(利用)을 위(爲)하여 Track의 폭(幅)을 넓히는 등(等)의 개량(改良)이 요망(要望)된다.

• 대한기계학회논문집A
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• 제40권11호
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• pp.949-954
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• 2016

제설기가 구동할 때, 센서제어에 의해 구동하다보면 역방향으로의 무한 구동에 의하여 와이어가 반대로 감기거나 인장이 크게 걸려 파손되는 경우가 종종 발생한다. 또한 기존 제설기는 제설판이 철재로 제작되고 실린더도 무겁기 때문에 자체무게에 의해 전방으로 전복되는 일이 빈번하여 차량 파손이 되는 문제점이 있다. 본 연구에서는 수동식 방향전환과 와이어 방식을 탈피한 센서 제어형 전자동 전동 제설기를 개발하였다. 노면 밀착도 유지와 충격시 삽날을 보호하여 내구성을 확보할 수 있도록 제설삽의 내구성과 제설삽을 제어하기 위하여 모터 자체의 충격방지 장치를 개발하였으며 클러치 역할을 하는 획기적인 장치인 보빈을 설계하여 장력과 피로도를 없애는 방법을 제안하고자 하며 이를 통해 차량에 무리를 주지 않고 제설기 수명을 연장시키도록 개발하였다.

• 한국유통학회지:유통연구
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• 제2권2호
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• pp.153-172
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• 1997

The distribution sector is affected by a wide range of regulations. Many of these are related to health and safety, others are related to urban planning and environmental issues, whereas some mainly have an economic basis. But, regulations many be unduly restrictive, in which case they can drive up costs and ultimately prices, or they may, in some cases, reduce consumer choice. Unduly restrictive regulations could also increase costs indirectly, by reducing competition and thus lead to lower productivity growth. In the past few years, distribution sector has gone through drastic changes due to deregulation and market opening. Implementation of regulatory reforms served as an opportunity to change laws and systems which had been an obstacle to development of distribution sector. Market opening of distribution sector became a turning point to promote competition among domestic and foreign firms. However, for small and medium scale of the typical retail enterprises which were in no position to compete in terms of prices, additional facilities, and services, faced a threat of diminished trading area, and even of their existence. Because, large firms may have greater market power than small firms, as they can more easily extract favorable terms when procuring goods, and may also be able to deter entry by advertising outlays or access to the best sites. In addition, larger chain stores armied with sufficient capital dominated trading area and reduced customer's welfare by abusing their monopoly power when competing with other shops, and are often cited as an example of adverse effects of local monopoly. In order to minimize such adverse effects and to foster competition, regulatory reforms in distribution sector should set its goal to promote sound and stable distribution activities through market principle and restoring competition principle, and ultimately to boost customers welfare. Therefore, deregulation in distribution sector should be implemented in a way to promote customers welfare, eliminate entry barriers, and expand competition principle such as productivity and efficiency competition. However, it should be also recognized that deregulation of system alone is not enough to develop the distribution sector. To compete in a increasingly concentrated industry, small enterprises increasingly engage in co-operative arrangements, such as buying groups, strategic alliances or franchise agreements.

• 융합정보논문지
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• 제8권3호
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• pp.169-174
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• 2018

오늘날 세계는 네 번째 산업혁명을 일으킬 신기술의 시대를 맞이하였고, 이는 'Industry 4.0'으로 통한다. Industry 4.0은 산업을 구성하는 다양한 요소가 서로 의사소통을 할 수 있는 스마트 체인을 구축하는데 기반을 두기 때문에 경제, 사회, 기술, 법률 등 다양한 측면에서 높은 불확실성이 존재한다. 위와 같은 사실을 바탕으로 본 논문에서는 Industry 4.0의 기본개념 수립 및 기능수행 시 발생하는 부정적 측면을 최소화시키기 위하여 선행연구자들의 연구를 바탕으로 한국 중소제조기업의 대응방안을 찾기 위한 연구를 하였다. 그 결과 Industry 4.0의 불확실성을 다양한 측면에서 정확하게 파악하고 대처하기 위한 노력을 한다면, Industry 4.0의 심장부에 해당하는 스마트 공장을 통해 기업의 영업이익 증대 및 국가의 경제성장을 이루는데 도움이 될 것이다.