Currently, agriculture in Korea is facing a manpower shortage due to a decrease in the population and an aging workforce. Involving disabled people in agriculture as a solution to the problem of manpower shortage in agriculture can help both farmers and people with disabilities. For this, it is necessary to develop agricultural tools that disabled people can use in agricultural activities. This study tried to design agricultural work equipment for the disabled by applying a design technique using a digital human body model. To this end, in this study, a human body model for the disabled was created using anthropometric data for the disabled. After that, the agricultural work simulation using human body models was used to identify the problems in agricultural work of the disabled, and design supplementation was performed to solve the problems. As a result, design dimensions such as the height of the farm work bench for the disabled, the length of the fruit harvester, the length of the sprayer, and the height of the starter switch were determined. This study has significance in that the digital human body model-based design method was applied to the design of agricultural work equipment for the disabled.

Today, we are living in an era of city. Many cities around the world are exposed and vulnerable to natural disasters and environmental pollution due to rapid urbanization and population concentration. Most of these city problems occur in space and as a solution to all these problems, Digital Twin is continuouslybeing introduced. A digital urban space infrastructure and multi-dimensional spatial data analysis are required to effectively solve and deal with various city problems. One of problem in land administration aspect, to change ownership and get a permit take a long time. In order to improve this situation, digital twin concept is proposed. It’s operation and management became possible as the information systems took a transition from paper to computerized files, from files to integrated databases, from two-dimensional to three-dimensional data, and as transition took place, the need for a virtual urban space or "DigitalTwin" that can integrate distributed urban data into one came to fore. In this study, the new preprocess was suggested to use Digital Twin concept in order to reduce time line and to make an efficient work process for land administration.

국제해사기구(IMO, International Maritime Organization)를 중심으로 자율운항선박 도입을 대비한 해사안전 및 보안관련 국제 협약 을 제정하고 있다. 국내에서도 선급 및 산업체를 중심으로 자율운항시스템 기술개발에 착수하고 있으며 연안선박에서 발생하는 사고를 줄이기 위해 연안선박을 대상으로 하는 자율운항선박 기술적용 방안 연구가 진행되고 있다. 국내외적으로 자율운항선박에 대한 관심이 크게 증가하고 있으며 실제 개발된 기술의 검증을 위한 해상실증이 본격적으로 추진되고 있다. 본 연구에서는 연안선박에 적용하기 위한 디지털트윈 기술 관련 실증선박과 육상 플랫폼(원격지원센터)의 설계를 위한 기초연구를 진행하였다. 디지털트윈 기술을 선박에 적용하 기 위해 8m 소형 배터리 전기추진선박을 대상으로 선정하였으며, 선박과 육상 플랫폼 간 통신을 통해 선박 항해 및 운전 데이터가 서버 시스템에 저장되고 전기추진선박의 원격제어 명령이 가능한 디지털트윈 통합 플랫폼의 기본 설계를 진행하였다. 이러한 디지털트윈 기술 을 적용한 선박 성능관리, 운항 및 운영 최적화, 예지제어 등이 가능할 것으로 판단되며, 위기상황에 대응이 가능한 안전하고 경제성 있는 디지털트윈 기술의 선박적용이 가능할 것이라 사료된다.

In this study, we aimed to apply 3D digital printing to basic clothing production and to propose futuristic fashion design and production methods that correspond to contemporary trends. Literature on future trends, dynamism, mechanical aesthetics, and experimentalism were used to define the characteristics of “futurism.” Based on theoretical considerations about futurism, we created fashion designs using 3D digital printing methods. These designs were produced using the aesthetic characteristics of futurism; the 3D digital clothing program; and application of digital printing technologies to futuristic silhouettes, colors, and materials. The results were as follows: First, with the application of futurism as a fashion motif, we pursued collaboration between artistic work and fashion, and we then explored the possibility of creative expression. Second, harmony between achromatic and chromatic colors revealed even better dynamism and activeness, and the potential to express dynamism was observed. Third, with the development of fashion design processes based on 3D digital printing methodologies, it was found to be possible to eliminate the limitations of time and space, solve problems related to limited budget or communication, and positively influence the fashion industry by enhancing convenience and diversity. Fourth, with the development of fashion design that utilizes digital printing, it was found that problems related to time, space, or limited budget were able to be solved, as compared to the use of traditional printing and image reproduction.

The decommissioning of a nuclear power plant is a project that consists of several stages, and various technologies are applied when performing various tasks at each stage. And it is essential to secure safety and economic feasibility. As the paradigm has changed due to digital transformation in various industries, digitalization is applied to the life cycle of nuclear power plant from construction, operation and decommissioning project. Element technologies are being developed for decommissioning plan establishment, process design, econtamination method, decommissioning work process, waste management, environmental monitoring and radiation dose simulation. The utilization of digital twin in the decommissioning stage is classified into three categories. ① Process Monitoring (decommissioning work procedure, work progress (plan/actual), real-time work status and etc.) ② Facility Monitoring (real-time sensing and video data monitoring, decommissioning SSCs information, work alarm and etc.) ③ Safety Monitoring (work safety, radiation exposure, fire monitoring, work risk and etc.) A system suitable for the decommissioning stage and work should be developed in consideration of the target of use, development function, and when to create data according to the purpose of the system. Simulation module according to user purpose should be provided. In addition, data-base management should be performed according to the decommissioning characteristics in consideration of the data associated with the existing operating system. The system to be developed should support the project management to comply with the domestic standards and regulations to be determined in the future. This will improve the competitiveness of domestic and foreign markets.

This study presents an example of creating and optimizing a task sequence required in an automated remote dismantling system using a digital manufacturing system. An automated remote dismantling system using a robotic arm has recently been widely studied to improve the efficiency and safety of the dismantling operations. The task sequence must be verified in advance through discrete eventbased process simulation in a digital manufacturing system to avoid problems in actual remote cutting operations as the main input of the automated remote dismantling system. The laser cutting method can precisely cut complicated target structures such as reactor internals with versatility, but a robot and a pre-prepared program are required to deploy sophisticated motion of the laser cutting head on the target structure. For safe and efficient dismantling operations, the robot’s program must be verified in advance in a virtual environment that can represent the actual dismantling site. This study presents creating and optimizing the task sequence of a robotic underwater laser cutting as part of the project of developing an automated remote dismantling system. A task sequence is created to implement the desired cutting path for the target structure using the automated remote dismantling system in the virtual environment. The task sequence is optimized for the posture of the laser cutting head and the robot to avoid collisions during the operation through discrete event-based process simulation since the target structure is complicated and the volume occupied by the laser cutting head and the robot arm is considerably large. The task sequence verified in the digital manufacturing system is demonstrated by experiments cutting the target structure along the desired cutting path without any problems. The various simulation cases presented in this study are expected to contribute not only to the development of the automated remote dismantling system, but also to the establishment of a safe and efficient dismantling process in the nuclear facility decommissioning.

The RPV internal structure is a high radio activated part and has very complex geometry. Therefore, it needs to be cut remotely with an automated cutting system to minimize the worker exposures. To do so, we made up the remote laser cutting system with a laser cutter, robot manipulator and control software system and the laser cutter is moved by the robot manipulator based on the command from the control software system. A laser cutter is required to keep the desired standoff position between the nozzle of the laser cutter and surface of the cut target model to cut properly. Moreover, in the remote cutting process, an exact time and sequence control of the air supply and the laser emission is required for the cutting quality and the process safety. In this study, we proposed the PERT chart-based process execution and control methodology. The PERT chart is a graph which is represented by nodes and edges. The node of the PERT chart has the information about the activity details such as activity type, execution time and related device. Using the edge we make the sequence of the desired activity execution. A PERT chart of the cutting scenario is compiled in the control software system to creates data and thread structure to operate the physical device. We built software architecture to interpret and execute the PERT chart efficiently in the digital simulation platform which enables us to use existing pre-built simulation scenario for the laser cutting process. In addition, we have tested various laser cutting test cases in our test bed to verify the performance of our system. The test bed environment has the shape of the RPV internal structure and is placed under water.

The hydro-mechanical behavior of rock mass in natural barriers is a critical factor of interest, and it is mainly determined by the characteristics of the fractures distributed in the rock mass. In particular, the aperture and contact area of the fractures are important parameters directly related to the fluid flow and significantly influence the hydro-mechanical behavior of natural barriers. Therefore, it is necessary to analyze the aperture and contact area of fractures distributed in potential disposal sites to examine the long-term evolution of the natural barriers. This study aims to propose a new technique for analyzing the aperture and contact area using the natural fractures in KURT (KAERI Underground Research Tunnel), an underground research facility for the deep geological disposal of high-level radioactive waste. The proposed technique consists of a matching algorithm for the three-dimensional point cloud of the upper and lower fracture surfaces and a normal deformation algorithm that considers the fracture normal stiffness. In the matching process of upper and lower fracture surfaces, digital images obtained from compression tests with pressure films are used as input data. First, for the primary matching of the upper and lower fracture surfaces, an iterative closest point (ICP) algorithm is applied in which rotation and translation are performed to minimize the distance error. Second, an algorithm for rotation about the x, y, and z axes and translation in the normal direction is applied so that the contact area of the point cloud is as consistent as possible with the pressure film image. Finally, by applying the normal deformation algorithm considering the fracture normal stiffness, the aperture and contact area of the fracture according to the applied normal stress are derived. The applicability of the proposed technique was validated using 12 natural fractures sampled from KURT, and it was confirmed that the initial apertures were derived similarly to the empirical equation proposed in the previous study. Therefore, it was judged that the distribution of apertures and contact areas according to applied normal stress for laboratory-scale fractures could be derived through the technique proposed in this study.

PURPOSES : Speed management is essential for enhancing children’s safety in school zones. The objectives of this study are to analyze how digital-based school zone signs and newly proposed signage for increasing visibility influence speed reductions and how the new system facilitates drivers obeying the speed limits. METHODS : A before/after analysis technique with comparison groups (widely used to evaluate safety effects) was employed. To effectively capture the safety effects of the new system, two significant measures were selected as the measures of effectiveness: the rates of change in space mean speeds and speed limit compliance. RESULTS : With three target sites and three comparison sites, the mean space speeds after installing the new systems were found to be slightly reduced for all target sites (the reduction rates of the space mean speed were found to be 5% for site A, 1% for site B, and 6% for site C). The lack of a constant tendency in speed reduction effects at all sites might be owing to the fact that the speed data collection was conducted before the driver's system adaptation was sufficiently performed. Regarding the speed limit compliance rate, significant increases were observed at two sites (10% for site A and 51% for site C), but site B did not show an increasing effect. The reason for the absence of this effect is that the installation of crosswalks and speed bumps at the target site affected the driver's compliance with the speed limit. CONCLUSIONS : An insufficient amount of evaluation results was obtained for the new guidance system. However, the new guidance system method provides an alternative approach to improving children's safety, i.e., by inducing drivers to actively slow down in school zones.

본 연구는 디지털 미디어 환경변화 속에서 평생교육 강사들의 배움경험을 알아보기 위한 질적 사례연구이다. 디지털 미디어는 미래의 정보화 사회에 중요한 수단으로 계속 발전되어 왔지만, 코로나19로 인해 그 속도가 빨라졌다. 이러한 변화는 교육 현장도 예외가 없었다. 그 가운데 가장 큰 변화는 디지털 미디어 기반 온라인 수업이라고 할 수 있다. 특히, 공교육 현장과 달리 평생교육 현장에 있는 강사들에게는 체계적 지원 없이 교육 환경변화에 따른 준비와 책임이 발생했다. 이러한 책임 앞에 놓여있는 평생교육 강사들이 디지털 미디어 환경변화에 따라 새로이 경험하게 되는 배움 과정은 학습자의 배움과 교수설계 및 평생교육 기관의 경쟁력에도 영향을 미치는 중요한 요소라고 할 수 있다. 따라서 본 연구는 디지털 미디어 환경변화라는 현상의 맥락 안에서 평생교육 강사들의 배움경험을 알아보기 위해 특정 기준을 정하고 그 기준을 중심으로 연구 대상자를 선정했다. 연구 대상자로 선정된 평생교육 강사들은 디지털 미디어 환경변화에 적응하기 위한 내적, 외적 노력을 기울인 강사들이다. 이들을 대상으로 심층면담을 진행하고 이를 분석했다. 그 결과 첫째, 사례자들은 교육환경의 변화가 두렵기도 했지만, 변화를 장애라고 생각하지 않았다. 그들은 각자 자신에게 맞는 배움 방식을 선택하고 실천하며 자기 주도적으로 환경변화에 적응하려는 모습을 보였다. 둘째, 사례자들이 디지털 미디어 환경변화에 적응을 위해 발휘한 배움의 문제해결력은 사례자들 자신을 새롭게 발견하고 성장할 수 있게 만들어 준 새로운 배움으로 이어졌다. 셋째, 사례자들은 배움을 통해 교육적 환경변화에 적응을 위해 받은 도움이 다른 누군가에 돌려줘야 할 배움의 동반성장임을 깨닫게 되었다.

제 4차 산업혁명으로 기업은 내, 외부적인 변화를 마주하고 있다. 변화에 대응하고 생존을 넘어 지속적 인 성장을 위해 기업은 ICT 기술을 도입하고 업무 효율화를 추구하며 구성원의 역량 강화 등의 디지털 트랜스포메이션을 통해 대응하고 있다. 그러나 물적, 인적 자원을 구입하고 조달하는 데 한계가 있는 중소기업은 이러한 변화에 대응하는 데 어려움을 경험한다. 이를 극복하기 위한 대안으로 중소기업 임직원의 ICT 기술 역량 강화의 필요성이 대두되고 있다. 이에 본 연구는 디지털 트렌스포메이션 시대, 중소기업 임직원의 ICT 기술 역량 강화를 위한 교육의 효과성 증진을 목표로 서울 소재 중소기업의 최고경영진이 인식하는 ICT 기술에 대한 산업별 교육 요구도를 조사 및 분석하는 데 연구의 목적을 둔다. 이를 위해 서울산업진흥원에서 진행한 ‘서울기업 디지털 리더십 과정’ 교육 수료자를 대상으로 데이터를 수집하였 다. 수집된 데이터를 기반으로 t 검정, Borich 계수, the Locus for Focus 모델을 통해 요구도를 분석하였 다. 분석 결과 산업별 최우선 순위군에 속한 ICT 기술은 상이한 것으로 나타났다. 또한, 산업별 결과를 종합하면 대다수의 업종에서 우선적으로 고려되어야 할 요인은 인공지능, 가상증강현실로 나타났으며 빅 데이터는 특정 업종에서 우선적으로 고려되어야 할 요인으로 나타났다. 연구 결과를 바탕으로 산업별 ICT 기술 교육에 대한 실천적 방안을 제시하였다.

식량에 대한 수요 증가, 날씨의 불확실성, 생산성 손실, 운영 효율성 부족으로 인한 낮은 수익률 등의 문제를 개선하기 위한 기술의 필요성이 정밀 및 스마트 농업 기술 시장 성장을 촉진하고 있다. 센서, 센서 융합 기술, 작물 재배 및 디지 털 기반 기술은 앞으로 정밀 및 스마트 농업 분야에서 성장 및 발전이 기대되는 기술로 전망된다. 2050년까지 90억명으로 증가하리라 예상되는 인구, 기후변화와 지구 온난화, 환경악화, 음식물쓰레기, 소비자 건강과 만성질환 문제, 그리고, 끊 임없이 변화하는 소비자의 요구사항 등 농식품 관련 기술 혁신의 필요성은 그 어 느 때보다도 크다. 1차 산업, 2차 산업, 3차 산업이 결합된 6차 산업으로 발전하 는 과정, 더 나아가서는 바이오 및 에너지 기술 등과의 융합으로 인한 6차 및 알 파 산업화로 새로운 부가가치 창출이 기대된다. 본 연구에서는 KISTI가 보유한 글로벌 R&D 과제정보 및 인텔리전트 분석형 콘 텐츠(DB)를 기반으로 정밀농업, 스마트농업 시스템 자동제어기술, 식품 안정성 기 술, 작물 생산성 향상 정밀농업 분야 대표적 글로벌 공공투자 과제 현황 및 주요 국 연구개발 공공투자 프로파일 분석으로 연구개발 지형분석 및 글로벌 주요영역 별 R&D기반 공공투자 규모를 비교분석하였다. 향후 글로벌 선행 공공투자 대응 국내 디지털농업 분야 미래유망기술 R&D 발굴 및 전략수립을 지원하고자 한다.

본 연구는 정서적으로 불안정한MZ세대에게 나타나는 번아웃을 치유하기 위한, 디지털시 동영상 구독이 번아웃 치유에 미치는 영향을 규명하는 데 목적이 있다. 서울과 경기 지역에 거주하는 MZ세대 300명에게 설문지를 배포 및 회수하였다. 18개 문항으로 Likert 5점 척도로 구성된 번아웃 자가진단표 점수가46점 이상인 80명을 심층면접을 통해 선정하였다. 이중에서 3개월 동안 디지털시 프로그램에 구독하고자 하는 40명을 실험집단으로 분류하고, 디지털시 프로그램에 구독하기를 원하지 않는 40명을 대조집단으로 분류하였다. 직업, 스트레스 요인, 번아웃 치유 효과가 번아웃에 미치는 요인 간의 상관관계를 규명하기 위해 SPSS 27.0을 이용하여 교차분석, 독립표본 T-검정, 요인분석, 다중회귀분석을 수행하였다. 첫째, 직업과 번아웃 사이에는 높은 상관관계가 있는 것으로 나타났다. 둘째, 디지털시를 구독한 실험집단은 구독하지 않은 대조집단에 비해 번아웃 상태가 유의하게 개선되었다. 셋째, 번아웃에 영향을 미치는 요인은 상실감, 무기력감, 부담감, 피로감, 우울감 순으로 나타났으며, 그 중 상실감과 부담감이 전체의 80.395%로 높은 설명력을 보였다. 따라서 선정된 요소인 상실감과 부담감을 기반으로 한 치유모델 개발을 통하여, MZ 세대의 스트레스 개선으로 번아웃을 극복하는 디지털 치유 프로그램 구성에 기여할 것으로 기대된다.

Background: Trunk movements are an important factor in activities of daily living; however, these movements can be impaired by stroke. It is difficult to quantify and measure the active range of motion (AROM) of the trunk in patients with stroke. Objects: To determine the reliability and validity of measurements using a digital goniometer (DG) and smart phone (SP) applications for trunk rotation and lateral flexion in stroke patients. Methods: This is an observational study, in which twenty participants were clinically diagnosed with stroke. Trunk rotation and lateral flexion AROM were assessed using the DG and SP applications (Compass and Clinometer). Intrarater reliability was determined using intraclass correlation coefficients (ICCs) with 95% confidence intervals. Pearson correlation coefficient was used to determine the validity of the DG and SP in AROM measurement. The level of agreement between the two instruments was shown by Bland–Altman plot and 95% limit of agreement (LoA) was calculated. Results: The intrarater reliability (rotation with DG: 0.96–0.98, SP: 0.98; lateral flexion with DG: 0.97–0.98, SP: 0.96) was excellent. A strong and significant correlation was found between DG and SP (rotation hemiplegic side: r = 0.95; non-hemiplegic side: r = 0.90; lateral flexion hemiplegic side: r = 0.88; non-hemiplegic side: r = 0.78). The level of agreement between the two instruments was rotation (hemiplegic side: 23.02° [LoA 17.41°, –5.61°]; non-hemiplegic side: 31.68° [LoA 23.87°, –7.81°]) and lateral flexion (hemiplegic side: 20.94° [LoA 17.48°, –3.46°]; non-hemiplegic side: 27.12° [LoA 18.44°, –8.68°]). Conclusion: Both DG and SP applications can be used as reliable methods for measuring trunk rotation and lateral flexion in patients with stroke. Although, considering the level of clinical agreement, DG and SP could not be used interchangeably for measurements.