• 한국정보통신학회논문지
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• 제25권1호
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• pp.20-26
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• 2021

오늘날의 시스템들은 더 빠른 실행 속도와 더 적은 전력 소모를 위해 하드웨어와 소프트웨어 요소를 함께 포함하고 있다. 기존 하드웨어 및 소프트웨어 공동 설계에서 소프트웨어와 하드웨어의 비율은 설계자의 경험적 지식에 의해 나뉘었다. 설계자들은 반복적으로 가속기와 응용 프로그램을 재구성하고 시뮬레이션하며 최적의 결과를 찾는다. 설계를 변경하며 반복적으로 시뮬레이션하는 것은 시간이 많이 소모되는 일이다. 본 논문에서는 에너지 효율적인 FPGA 가속기 설계를 위한 하드웨어 및 소프트웨어 공동 설계 플랫폼을 제안한다. 제안하는 플랫폼은 가속기를 구성하는 주요 성분을 변수화해 응용 프로그램 코드와 하드웨어 코드를 자동으로 생성하여 설계자가 적절한 하드웨어 비율을 쉽게 찾을 수 있도록 한다. 공동 설계 플랫폼은 Xilinx Alveo U200 FPGA가 탑재된 서버에서 Vitis 플랫폼을 기반으로 동작한다. 공동 설계 플랫폼을 통해 1000개의 행을 가지는 두 행렬의 곱셈 연산 가속기를 최적화한 결과 응용프로그램보다 실행 시간이 90.7%, 전력 소모가 56.3% 감소하였다.

• 급식외식위생학회지
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• 제2권2호
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• pp.67-77
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• 2021

Concerns regarding work and food safety in foodservice operations are growing. The purpose of the study is to suggest guidelines for designing foodservice facilities, including school foodservices and Korean restaurants. A case of a franchise restaurant specializing in a Korean food item, Seolleongtang, was used to explain the facility design. The contents of the manual included ways to determine space allocation, calculate the application of utilities and the diameters of supply utility pipelines, and suggestions on how to decide on air conditioning equipment. The standards of the American Gas Association and the Japan Foodservice Equipment Association (JFEA) were applied to design the restaurant space. The JFEA standards and knowledge based on experience and statistics were applied to calculate the usage of utilities like fuel and water. The standards of JFEA and the Society of Heating, Air-Conditioning, and Sanitary Engineers of Japan were applied to calculate the diameters of the water supply and drainage pipelines. For the setting of the heating, ventilation, and air conditioning systems, three ways to carry out the calculation of effective ventilation were explained, as well as options to dicide the standard parameters of the duct and ventilation fans. This manual can contribute to the design of effective and efficient foodservice facilities and help secure the work safety of foodservice employees thereby ensuring food safety.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제16권7호
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• pp.2209-2224
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• 2022

The Internet of Things (IoT) is being used in a wide variety of fields due to the recent 4th industrial revolution. In particular, research is being conducted that combines IoT with the medical field such as telemedicine. Among them, the field of shock detection is a big issue in the medical field because the causes of shock are diverse, treatments are very complex, and require a high level of medical knowledge and experience. The transmission of infectious diseases is common when treating critically ill patients, especially patients with shock. Thus, to effectively care for shock patients, we propose an architecture that continuously monitors the patient's condition, and automatically recommends a drug injection treatment according to the patient's shock condition. The patient's hemodynamic information is continuously monitored, and the patient's shock generation information is recorded periodically. With the recorded patient information, the patient's condition is determined and automatically injected with necessary medication. The medical team can find out whether the patient's condition has improved by checking the recorded information through web applications. The study can help relieve the shortage of medical personnel and help prevent transmission of infectious disease in medical staff. We look forward to playing a role in helping medical staff by making recommendations for the diagnosis and treatment of complex and difficult shocks.

• Advances in nano research
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• 제13권1호
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• pp.97-111
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• 2022

In the present article, silica nanoparticles (SNPs) were exploited to improve the tribological and mechanical properties of vinyl ester/glass fiber composites. To the best of our knowledge, there hasn't been any prior study on the wear properties of glass fiber reinforced vinyl ester SiO₂ nanocomposites. The wear resistance is a critical concern in many industries which needs to be managed effectively to reduce high costs. To examine the influence of SNPs on the mechanical properties, seven different weight percentages of vinyl ester/nano-silica composites were initially fabricated. Afterward, based on the tensile testing results of the silica nanocomposites, four wt% of SNPs were selected to fabricate a ternary composite composed of vinyl ester/glass fiber/nano-silica using vacuum-assisted resin transfer molding. At the next stage, the tensile, three-point flexural, Charpy impact, and pin-on-disk wear tests were performed on the ternary composites. The fractured surfaces were analyzed by scanning electron microscopy (SEM) images after conducting previous tests. The most important and interesting result of this study was the development of a nanocomposite that exhibited a 52.2% decrease in the mean coefficient of friction (COF) by augmenting the SNPs, which is beneficial for the fabrication/repair of composite/steel energy pipelines as well as hydraulic and pneumatic pipe systems conveying abrasive materials. Moreover, the weight loss due to wearing the ternary composite containing one wt% of SNPs was significantly reduced by 70%. Such enhanced property of the fabricated nanocomposite may also be an important design factor for marine structures, bridges, and transportation of wind turbine blades.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제16권9호
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• pp.3068-3086
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• 2022

Digital Forensics is gaining popularity in adjudication of criminal cases as use of electronic gadgets in committing crime has risen. Traditional approach to collecting digital evidence falls short when the disk is encrypted. Encryption keys are often stored in RAM when computer is running. An approach to acquire forensic data from RAM when the computer is shut down is proposed. The approach requires that the investigator immediately cools the RAM and transplant it into a host computer provisioned with a tool developed based on cold boot concept to acquire the RAM image. Observation of data obtained from the acquired image compared to the data loaded into memory shows the RAM chips exhibit some level of remanence which allows their content to persist after shutdown which is contrary to accepted knowledge that RAM loses its content immediately there is power cut. Results from experimental setups conducted with three different RAM chips labeled System A, B and C showed at a reduced temperature of -25C, the content suffered decay of 2.125% in 240 seconds, 0.975% in 120 seconds and 1.225% in 300 seconds respectively. Whereas at operating temperature of 25℃, there was decay of 82.33% in 60 seconds, 80.31% in 60 seconds and 95.27% in 120 seconds respectively. The content of RAM suffered significant decay within two minutes without power supply at operating temperature while at a reduced temperature less than 5% decay was observed. The findings show data can be recovered for forensic evidence even if the culprit shuts down the computer.

• 디지털융복합연구
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• 제19권11호
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• pp.53-62
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• 2021

원격수업은 COVID-19 확산과 함께 교육 현장에서 주요 이슈가 되었다. 원격교육 학습자의 만족을 제고하기 위해 학습자의 역량을 배양하는 노력과 함께 정보기술 인프라를 구축하고 양질의 콘텐츠 제공과 학습을 지원하는 활동도 포괄적으로 고려되어야 한다. 본 연구는 대학생 221명의 설문을 바탕으로 SmartPLS를 활용한 구조방정식모델을 통해 디지털 리터러시의 하위요인인 지식, 기술, 태도와 정보시스템의 성공 요인의 하위요인인 시스템 품질, 정보 품질, 서비스 품질 모두 원격수업의 만족도에 긍정적인 영향을 주며, 차례로 만족도 또한 원격수업의 지속 사용 의도에 긍정적인 영향을 준다는 점을 검증하였다. 본 연구는 원격수업의 만족도와 지속 사용 의도에 미치는 영향을 학습자 능력과 정보기술 인프라를 포괄적으로 고려하여 분석했다는 점에서 의의가 있다. 향후 대학생뿐만 아니라 초중등 학생 및 교수자 등으로 대상을 확대하고, 원격수업 과정의 주요 요인인 상호작용 등을 추가적으로 고려하여 연구를 심화할 필요가 있다.

• 한방안이비인후피부과학회지
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• 제35권1호
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• pp.48-57
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• 2022

Objectives : The purpose of this review study is to identify clinical indications of Hwangryunhaedok-tang(HHT) external application and to suggest directions for future research and treatment by analyzing domestic cases applying HHT external treatment except for pharmacopuncture research. Methods : We searched 235 studies published in Korean since 2000 from four domestic databases: Oriental Medicine Advanced Searching Integrated System(OASIS), Research Information Sharing Service(RISS), Korean Traditional Knowledge Portal(KTKP), and Korean studies Information Service Systems(KISS) using keywords such as 'HTT and external use', 'HHT and external agent' 'HHT and wet dressing', or 'HHT and case'. We excluded duplicate papers, papers related to acupuncture including pharmacopuncture, or papers not related to the topic. Results : We selected and analyzed seven case reports. HHT external agent was used alone in one case, as main treatment in two cases, and as adjuvant treatment in four cases. HHT external application was applied to various skin diseases accompanied by inflammation mainly in the form of wet dressings. Conclusion : HHT external agent may be effective on various skin diseases accompanied by inflammation when applied alone or in combination with other agents according to the treatment stage. Based on this results, further studies will be needed to establish the primary clinical indication of HHT external agent.

• 대한간호학회지
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• 제52권4호
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• pp.391-406
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• 2022

Purpose: The purpose of this study was to provide foundational knowledge on nursing tasks performed on patients with COVID-19 in a nationally-designated inpatient treatment unit. Methods: This study employs both quantitative and qualitative approaches. The quantitative method investigated the content and frequency of nursing tasks for 460 patients (age ≥ 18 y, 57.4% men) from January 20, 2020, to September 30, 2021, by analyzing hospital information system records. Qualitative data were collected via focus group interviews. The study involved interviews with three focus groups comprising 18 nurses overall to assess their experiences and perspectives on nursing care during the pandemic from February 3, 2022, to February 15, 2022. The data were examined with thematic analysis. Results: Overall, 49 different areas of nursing tasks (n = 130,687) were identified based on the Korean Patient Classification System for nurses during the study period. Among the performed tasks, monitoring of oxygen saturation and measuring of vital signs were considered high-priority. From the focus group interview, three main themes and eleven sub-themes were generated. The three main themes are "Experiencing eventfulness in isolated settings," "All-around player," and "Reflections for solutions." Conclusion: During the COVID-19 pandemic, it is imperative to ensure adequate staffing levels, compensation, and educational support for nurses. The study further propose improving guidelines for emerging infectious diseases and patient classification systems to improve the overall quality of patient care.

• 지능정보연구
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• 제29권1호
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• pp.203-214
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• 2023

우리나라 관세청은 효과적인 원스톱(One-stop) 업무 처리가 가능한 전자통관 시스템으로 효율적으로 업무처리를 하고 있지만 기술의 발달과 비대면 서비스의 증가로 매년 수출입건수가 증가하고 있으며 그에 따른 업무량도 폭증하고 있는 실정으로 이에 따른 보다 효과적인 방법이 매우 필요하다. 수입과 수출은 모든 물품에 대한 분류 및 세율 적용을 위한 HS Code(Harmonized system code)가 필요하고 해당 HS Code를 분류하는 품목 분류는 전문지식과 경험이 필요한 업무 난이도가 높고 관세 통관절차에서 중요한 부분이다. 이에 본 연구는 품목 분류 의뢰서의 물품명, 물품상세설명, 물품 이미지 등의 다양한 유형의 데이터 정보를 활용하여 멀티모달 표현 학습(Multimodal representation learning) 기반으로 정보를 잘 반영할 수 있도록 딥러닝 모델을 학습 및 구축하여 HS Code를 분류 및 추천해 줌으로써 관세 업무 부담을 줄이고 신속한 품목 분류를 하여 통관절차에 도움을 줄 것으로 기대한다.

• 산업경영시스템학회지
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• 제45권4호
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• pp.142-149
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• 2022

This study attempts to analyze the economic impact of the service robot industry using Input-Output analysis, which is conducted based on Demand-driven model, the Leontief price model, the Backward and Forward Linkage Effects, and the Exogenous Methods. In a Demand-driven model analysis, we can conclude that the service robot industry contains characteristics of both the manufacturing industry and the service industry, which causes a positive impact on the overall industry by compensating for the weaknesses of the two industries. The Leontief price analysis indicates when wages in the service robot industry increase, prices related to robot manufacturing also increase. Also, when profits in the service robot industry increase, prices related to service provision increase, too. The Backward and Forward Linkage Effects analysis shows that the service robot industry is highly sensitive to the current economic condition and has a great influence on the service industry. The service robot industry can highlight the aspect of service characteristics when the manufacturing industry is in recession and vice versa. In addition, the service robot industry can be regarded as a value-adding and domestic economy promoting industry which utilizes knowledge of information and communication technologies. It is important to foster the service robot industry in South Korea, which is in economic recession to provide an opportunity to stimulate the growth of both service and robot industries.