In this work, we introduce a 100 kW class mobile plasma melting system designed for non-combustible radioactive wastes treatment. To ensure mobility, the designed system consists of two 24-ft commercial containers, each in charge of the plasma utilities and melting process. In the container for plasma utilities, a 100 kW class DC power supply is installed together with a chiller and gas supply system whereas the container for melting process has a transferred type arc melter as well as off-gas treatment system consisting of a heat exchanger, filtrations, scrubber and NOx removal system. As a heat source for a transferred type arc melter, we adopted a hollow electrode plasma torch with reverse polarity discharge structure. Detailed design for a 100 kW class mobile plasma melting system will be presented together with the main specifications of the components. In addition, the basic performance data of the melting system is also presented and discussed.

As the plan for the nuclear dismantlement due to the permanent shutdown of Kori-1 and Wolseong- 1 nuclear power plants has been concretized, a “movable radionuclide analysis system” is being developed that can quickly and accurately analyze large amounts of radioactive waste generated on the sites during dismantling. This system has various advantages from the perspective of strict regulations on the radioactive waste movement and social acceptability, such as preventing unexpected accidents while moving on the national highway or expressway, reducing various documents and immediate response to dismantling plans. Currently the system is being developed to be equipped with previously developed sample pretreatment and radioactivity measuring equipment and automated volatile and nonvolatile nuclide separation equipments, but to ensure mobile stability, it needs to analyze factors and establish stability standards. In the KS Q ISO/IEC 17025:2017 standard, the requirements for “facilities and environmental conditions” are a very important factor in building reliability for consumers as part of the quality guarantee for this facility. In order to meet the requirements, the technical standards of various test equipment to be installed in this facility were investigated. The physical, chemical, and radiological hazards that could affect the safety of the equipment and workers in the process of moving the equipment between nuclear power plants or between nuclear dismantling sites were derived from vibrations, rapid changes in temperature and humidity, and the spread of contamination from radioactive waste samples. Therefore, the scope of application of the law, which is the basis for securing stability during movement, was classified into two situations: movement from facility manufacturer to installation site (non-contaminated) and movement from primary to secondary use (contaminated). And in order to investigate the Nuclear Safety Act, enforcement ordinances, and radiation safety management, and to establish standards for packaging and transportation of radioactive materials, the results of transportation tests and transport details were compared and analyzed. Finally, the air suspension systems and the automatic temperature and humidity control devices were analyzed to establish standards for securing stability against the vibration and the sharp changes in the temperature and humidity, and countermeasures such as accident measures in accordance with the Enforcement Decree of the Nuclear Safety Act were also investigated.

최근 10년간 국내에서 발생한 해양사고현황에 따르면, 총톤수 10톤 미만의 소형어선이 차지하는 비중은 전체 해양사고 중 47.51%로 높게 확인되었다. 또한 해양사고의 증가추세 역시 다른 선종/크기(총톤수)에 비해 매우 가파르게 증가하고 있어 이에 대한 대책마련이 시급한 실정이다. 한국해양교통안전공단에서는 소형어선의 선박검사제도 개선방안으로 자체검사제도의 도입을 제안한 바 있으며, 해양수산부에서는 최근 비대면 검사방법의 도입을 위해 ‘원격방식에 의한 선박검사 지침’을 마련하여 시행하였다. 본 연구에 서는 소형어선의 해양사고 감소 방안으로서 자체검사승인제도를 제시하고, 원격방식의 선박검사제도의 정형화 방안마련을 위해 모바 일 애플리케이션을 개발하여 실효성을 분석하였다. 그 결과 어선소유자의 자발적인 안전관리를 유도하기 위한 자체검사승인제도의 도 입과 함께 모바일 애플리케이션 기반 선박검사제도 도입의 필요성이 확인되었으며, 자체검사승인제도는 선박소유자의 안전의식을 고 취시켜 해양사고 감소에 대한 실효성이 있음을 확인하였다.

The role of QR Code robots in smart logistics is great. Cognitive robots, such as logistics robots, were mostly used to adjust routes and search for peripheral sensors, cameras, and recognition signs attached to walls. However, recently, the ease of making QR Codes and the convenience of producing and attaching a lot of information within QR Codes have been raised, and many of these reasons have made QR Codes recognizable as visions and others. In addition, there have been cases in developed countries and Korea that control several of these robots at the same time and operate logistics factories smartly. In this work, we are developing a robot that can recognize its current position, move and control in the directed direction through two-dimensional QR Codes with the same horizontal and vertical sides, and the error is to create a QR Code robot with accuracy to reach within 3mm. This paper focuses on experimental environments for testbeds during the development of QR Code-aware indoor mobility robots.

This study utilized Automated Speech Recognition technology to determine the potential utility and acceptance of such technology in the English as a Foreign Language classroom. Learners were made aware of the Automatic Speech Recognition potential of their mobile devices and provided with some direction in, and incentive for, its use. Participants were then scored on their assessment of the technology according to the Technology Acceptance Model. Participants showed a marked appreciation for the ease and utility of the technology with over 72% agreeing that the technology was both accessible and useful. Support for the use of Automatic Speech Recognition as a testing method was somewhat mixed, with 75% of participants agreeing that the testing was fair, but only 60% reporting that they felt they did well on the test. As a secondary point of interest, this study examined the potential use of Automatic Speech Recognition technology for teaching and testing pronunciation.

모바일 환경의 발달은 사람들이 SNS를 대인 커뮤니케이션 채널로 의존하도록 만들고 있으며 SNS를 통해 타인의 상태에 대한 논평을 하거나 언급하는 성 향을 형성하면서 이용자들간의 관계를 형성하거나 유지하도록 하는 중요한 역할을 담당하기도 한다. 한 개인이 다른 특정한 개인과 지속적인 정서적 유대를 가지는 경향을 애착이라 하는데, 특정 미디어나 브랜드를 이용하는 과정에서 애착이 발생한다는 연구가 나타났다. 이에 본 연구에서는 대인관계의 중요한 역할을 담당하고 있는 SNS와 이용자의 애착정도를 살펴보고 애착 관계에 따라 사회적 자기효능감과 대인관계 만족도에 미치는 영향을 살펴보고자 하였다. 이를 위해 온라인을 통해 203명의 SNS 이용자를 대상으로 설문을 실시하였다. 그 결과 SNS의 하위요인 중 안정감과 분리불안 요인 사회적 효능감과 대인 관계 만족도에 통계적으로 유의미한 영향을 미치는 것으로 조사되었다. 안정감의 경우 긍정적인 영향을 미치고 있었으며, 분리불안은 부정적인 영향을 미치는 것으로 조사되었다. 분리불안의 부정적인 영향은 SNS중독 연구들과 비슷한 연구 경향성을 보이고 있다. 하지만 안정성 측면에서 긍정적인 영향을 미치고 있어 SNS 이용 동기인 관계 측면에서의 긍정적인 영향관계를 살펴볼 수 있는 연 구 결과라 할 수 있다.

The role of QR Code robots in smart logistics is great. Cognitive robots, such as logistics robots, were mostly used to adjust routes and search for peripheral sensors, cameras, and recognition signs attached to walls. However, recently, the ease of making QR Codes and the convenience of producing and attaching a lot of information within QR Codes have been raised, and many of these reasons have made QR Codes recognizable as visions and others. In addition, there have been cases in developed countries and Korea that control several of these robots at the same time and operate logistics factories smartly. This representative case is the KIVA robot in Amazon. KIVA robots are only operated inside Amazon, but information about them is not exposed to the outside world, so a variety of similar robots are developed and operated in several places around the world. They are applied in various fields such as education, medical, silver, military, parking, construction, marine, and agriculture, creating a variety of application robots. In this work, we are developing a robot that can recognize its current position, move and control in the directed direction through two-dimensional QR Codes with the same horizontal and vertical sides, and the error is to create a QR Code robot with accuracy to reach within 3mm. This paper focuses a study on the speculative navigation using auxiliary encoder during the development of QR Code-aware indoor mobility robots.

모바일 기반 온실에너지 계산프로그램을 제작하기 위해 먼저 주요 단일 피복재 10종 및 보온재 16종에 대한 열관류율 측정하였다. 또한 피복 및 보온재를 이중 및 삼중으로 다층 설치할 때 열관류율 추정을 위하여 이중 설치시 24조합, 삼중설치 시 59조합에 대한 열관류율을 핫박스를 이용하여 측정하였다. 단일 피복재에서는 PE필름(0.08mm) 대비 PO필름(0.15mm) 이 가장 열관류율이 가장 작고 열절감율이 가장 큰 것으로 나타났다. 단일 보온재에서는 열관류율에서는 외피가 있는 5겹 의 다겹보온커튼이 가장 보온력이 좋은 것으로 나타났다. 또한 단일자재에 대한 열관류율 값과 열저항값을 이용한 피복 및 보온재의 다층설치시의 총 열관류율 값을 산정하였고 실측 값과의 오차를 보정하는 선형회귀식을 도출하였다. 단일재료의 열관류율값에 의한 피복 및 보온재의 다층설치시 열관류율 추정 모형을 개발한 결과 모형평가지수가 0.90(0.5 이상일 때 양호)으로 나타나 추정치가 실측치를 매우 잘 재현 하고 있는 것으로 나타났다. 또한 시험온실을 통한 실증시험결과 예측된 열절감율이 실측치보다 상대오차 2%로 작게 나타나는 것으로 평가되었다. 이러한 연구결과를 기반으로 모바일 기반의 온실 에너지계산 프로그램을 개발하였다. 이 프로그램은 HTML5 표준 웹 기반 모바일 웹 애플리케이션으로 구현하였으며 N-Screen 지원을 통해 다양한 모바일 장치 및 PC 브라우 저에서 동작이 가능하게 제작되었다. 또한 온실 피복(12종) 및 보온재(16종)의 조합별 열관류율 및 난방부하계수를 제공 하여 농민이 모바일로 온실 위치, 형태 및 피복·보온재 등을 반영한 최대 주야간 냉난방부하 및 기간 난방부하를 산정할 수 있다. 대상 온실의 에너지 소비량에 대한 평가가 가능하며 온실의 지역 및 형태에 따라 피복 및 보온재의 최적 선택으로 에너지 절감형 온실 설계가 가능할 것으로 판단되었다.

As the initial form of human civilization, games are symbolic interactive behaviors full of emotional communication. With the development of technology, mobile online games have become a new mass entertainment and social media and profoundly changed people's communication mode. Mobile online games have inherited the emotional interaction behavior in traditional games, but also opened up a new emotional interaction mode, reshaping modern people's cognition and communication. Players establish contact with other players through games to produce interactive behaviors, and the essence of interactive behaviors is the process of emotional communication. The rapid development of mobile online games has not only changed the development of social economy, but also changed the economic and social relations between people and society, as well as the emotional cognitive style. This paper holds that the essence of any interactive behavior is the process of emotional communication, which will have a far-reaching impact on society and individuals. Studying gamer and society under modern conditions from the perspective of emotional communication may better understand our life and existence. On the other hand, in the process of emotional interaction, the inevitable conflict causes one or more negative emotions to breed, which may gradually develop into serious social problems, especially adolescent health problems. Therefore, how to make better use of the positive effects of emotional communication in mobile online games in real life, work and study, and how to avoid and solve the social and personal problems that may arise in the process of emotional communication in mobile online games are practical problems that need to be further considered and solved in future research.

With the wide availability of mobile devices, efforts to accommodate these technological devices have been made in pronunciation training. This study aimed to investigate the effectiveness of mobile apps in improving the perception and production of the English vowels, /o/ and /ɔ/, which are difficult to discriminate and produce for Korean learners of English. The participants were 24 college freshmen enrolled in a general English course. They shadowed the model pronunciation from the application and corrected their production after instant feedback from the automatic speech recognition application. Their perception was evaluated in the preand post-tests, and the production was visually examined on the formant chart. The training was held for 5 minutes each day, for a month. The results showed that the training made positive effects on improving students’ perception of the target vowels. There was also some progress in their production although the improvement was not as noticeable as in perception. A discrepancy in the production was discovered between male and female participants with the latter performing better.

Mobile-assisted language learning has expanded beyond relatively humble beginnings of replicating computer-based activities assigned in formal language learning contexts, and it now often consists of a complex mix of formal and informal learning activities that take place at different times and places throughout learners’ daily lives. Decisions about what tools to use are often driven by the costs, choice of hardware, and the knowledge of what tools actually exist, and how these tools are then used will depend on learners’ skills, motivation, as well as their short- and long-term goals. Language learning no longer needs to be an activity that is separated from learners’ daily lifestyles, but can be an integral part of their lives in the long term. The complexities involved in understanding each individual learner’s own ecological context and how these ecologies shift over time will be discussed with an eye on optimising learning opportunities for learners that will keep them engaged in learning throughout their lives.

본 연구는 계획행동이론(Theory of Planned Behavior ; TPB)을 바탕으로 코로나-19 환경에서 대학생이 인식하는 생활체육과 참여의사 및 참여행동에 관하여 인과 관계(SEM)를 적용하여 대학생이 인식하는 생활체육을 탐색하고, 생활체육 종목을 예측하기 위한 기초자료를 제공하고자 하였다. 이를 위해 2020년 12월 1일 ~ 2021년 5월 1일까지 표본계획에 의해 모바일 프로그램인“서베이 몽키”를 사용하여 총 267명 분석에 사용했다. 연구결과 계획행동이론는 생활체육 참여의사와 통계적으로 유의미한 정(+)의 상 관관계가 있는 것으로 나타났다. TPB는 생활체육 참여행동에 통계적으로 유의미한 정(+)의 상관관계가 있는 것으로 나타났으며, 생활체육 참여의사는 생활체육 참여행동과 통계적으로 유의미한 정(+)의 상관관계가 있는 것으로 나타났다.

NDF (No Defect Found) is a phenomenon in which defects have been found in the manufacturing, operation and use of a product or facility, but phenomenon of defects is not reproduced in the subsequent investigation system or the cause of the defects cannot be identified. Recently, with the development of the fourth industrial revolution, convergence of hardware and software technologies in various fields is spreading to products such as aircraft, home appliances, and mobile devices, and the number of parts is increasing due to functional convergence. The application of such convergence technologies and the increase in the number of parts are major factors that lead to an increase in NDF phenomena. NDF phenomena have a significant negative impact on cost, reliability, and reliability for both manufacturers, service providers and operators. On the other hand, due to the nature of NDF phenomena such as difficult and intermittent cause identification and ambiguity in judgment, it is common to underestimate the cost of NDF or fail to take appropriate countermeasures in corporate management. Therefore, in this paper, we propose a methodology for estimating NDF costs by the PAF model which is a quality cost analysis model and ABC (Activity Based Costing) technique. The methodology of this study suggests a detailed procedure and the concept to accurately estimate the NDF costs, using ABC analysis, accounting system information, and IT system data. In addition case studies have validated the methodology. We think this could be a valid methodology to refer to when estimating the cost of other parts. And, it is meaningful to provide important judgment information in the decision-making process based on quality management and ultimately reduce NDF costs by visualizing them separately by major variable factors.

The purpose of this study is to analyze the adequacy of production capacity of the assembly process system of mobile bath vehicle’s top box panel and process design through a simulation analysis. Towards this end, the layout of the facility designed with pre-verification job using a simulation modeling and an experiment, and facility, logistics process, and personnel input method were made into a simulation model, and the design system’s adequacy was evaluated through an experiment. To produce 120 mobile bath vehicles annually, it was analyzed that 14 general workers and seven skilled workers were adequate through the experiment. It was also identified that three painting process lines carried out through outsourcing were adequate. Production lead time was 201.7 hours on average and it was 230 hours maximum. To meet customer delivery service level of 95% within the deadline when establishing a customer order and vehicle delivery plan, it was analyzed that more than 215 hours of lead time is needed minimum. If the process cycle time is reduced to 85% upon system stabilization and skillfulness improvement, it was analyzed that annual output of 147 vehicles can be achieved without additional production line expansion.

Physical activity and exercise is an important step in the journey of a healthy lifestyle. It reduces the risk of developing many diseases like diabetes, cardiovascular diseases, and even cancer. In today’s world, we spend most of our time sitting in front of a computer or mobile phones for work and entertainment. This is one of the leading factors in a lack of physical activities and thus a decrease in the fitness level of many individuals. In this paper, we design a mobile 2D platformer game where progress inside the game world is dependent on physical activity in the real world. The game has two modes namely adventure and story mode. This design can motivate people to lead an active and healthy lifestyle. The physical activity monitoring is done solely through the pedometer of a smartphone held by the user while playing the game. The number of steps walked by the user determines the number of revives inside the adventure mode of the game. There are three levels in the story mode which are unlocked by walking more than a certain number of steps in the real world.

본 연구는 모바일 홈트레이닝과 운동몰입, 지속의도에 대한 기술수용 이론을 적용한 인과관계 모형에 대한 구조분석 방법(SEM)을 적용하여 소비자을 예측하기 위한 기초자료를 제공하고자 하였다. 현재 코로나-19 팬데믹 사태로 인한 전략적 도구를 파악하기 위해 2021년 2월 1일부터 5월 21일까지 표본 계획에 의해 모바일 프로그램인 “서베이 몽키”를 사용하여 유효표본 총 287명의 소비자를 최종 분석에 사용하여 다음과 같은 결과를 도출하였다. 첫째, 수용모델이 운동몰입에 유의미한 영향(+)을 미치는 것으로 나타났으며, 둘째, 수용모델이 운동지속의도에 유의미한 영향(+)을 미치는 것으로 나타났다. 셋째, 운동몰 입이 운동지속의도에 유의미한 영향(+)을 미치는 것으로 나타났다.