• The Journal of Korean Institute of Information Technology
• /
• v.17 no.12
• /
• pp.125-134
• /
• 2019

As the limitations of the passive recognition domain, which is not guaranteed transparency of the operation process, AI technology has a vulnerability that depends on the data. Human error is inherent because raw data for artificial intelligence learning must be processed and inspected manually to secure data quality for the advancement of AI learning. In this study, we examine the necessity of learning data management before machine learning by analyzing inaccurate cases of AI learning data and cyber security attack method through the approach from cyber security perspective. In order to verify the learning data integrity, this paper presents the direction of data-preserving artificial intelligence system, a blockchain-based learning data environment model. The proposed method is expected to prevent the threats such as cyber attack and data corruption in providing and using data in the open network for data processing and raw data collection.

• Journal of the Regional Association of Architectural Institute of Korea
• /
• v.21 no.5
• /
• pp.141-152
• /
• 2019

A gradual increase in the number of people with disabilities and the elderly in our everyday life has changed our perceptions toward them. The concept of barrier free space has been gradually incorporated into the social system and into our everyday life, and has further developed into the universal design concept so that creating an environment where all inhabitants of a city are able to enjoy the space of everyday life. Against this backdrop, this study has conducted research on how to improve the accessibility of major public spaces in Wonju, Chuncheon, and Gangneung, or major metropolitan cities of Gangwon Province. The research has been conducted under the assumption that the conditions of utilizing public spaces in those cities will not meet public expectations compared to private spaced despite being iconic cities of Gangwon Province. The field survey results show that the concept of barrier free space is reflected, to some extent, in planning and development although its role in terms of using such space is not up to expectations. In particular, the buildings and facilities built prior to the enforcement of relevant policies are found to leave much to be desired due to unsatisfactory development plans between architecture and urban public space, which necessitates improvement on relevant policies, sincere efforts of local governments, and practical guidelines that can be useful in the implementation stage. Above all, building owners and public administrations are advised to raise their awareness on the concept of universal design so that it is firmly rooted in our everyday life as one of the universal values. It should lead to the efforts of the members of local cities in providing the environment where people are able to enjoy these utilities from the perspective of promoting public welfare.

• Journal of Digital Convergence
• /
• v.19 no.2
• /
• pp.415-423
• /
• 2021

This study is to analyze works of Memphis design in the 1980s, which captured the appearance of a diversified society since the 20th century, and to present practical designs that can communicate with the public through the formulation of indoor lighting. As a research method, the background of the occurrence of Memphis groups, the theoretical background and the formative features of Memphis designs are considered around literature and prior research. The research applied Memphis's formative characteristics, colors and patterns to incorporate newly formulated designs into lighting. Lighting lamps in the forms that have made small changes to basic shapes show not only its functionality and decorability, but also its scalability as a formative language that conveys the emotions contained within humans. In addition, the choice of materials according to the changes in sculpture in the production of the work will suggest the possibility of creating a new formative art.

• Journal of Industrial Convergence
• /
• v.18 no.6
• /
• pp.1-7
• /
• 2020

In this study, we hypothesized that the needs for start-up support services may vary depending on the founder's psychological characteristics, such as self-efficacy or his attitude toward uncertainty. To verify this, a survey was conducted on the founders of 86 companies located in Business Incubators at Seoul and Daejeon and an empirical analysis was conducted based on the data. According to the analysis, the higher the self-efficacy of the founder, the more active he expressed his willingness to accept the start-up support service, which aims to provide start-up zones to busy areas outside the university. While the founder, who has experienced failure in the past, responded positively to attracting customers located outside the university. The results of this study supported the hypothesis and suggest that differentiated start-up support services should be designed by including not only characteristics at the level of start-up companies, such as industries and growth stages, but also the psychological characteristics of start-ups in important consideration.

• Journal of Industrial Convergence
• /
• v.19 no.1
• /
• pp.137-146
• /
• 2021

In This study investigated the effects of various intensity cycling exercise on body composition, blood lipids and fat metabolism in obese middle-aged women. 17 people obesity middle - aged women aged 35 to 55 years were divided into 3 groups: 5 people in the low intensity group, 6 people in the medium intensity group, and 6 people in the high intensity group. The object of this study was to compare the effect of cycle exercise performed between 20 ~ 50 minutes per a day,1 3 day times per week on the body composition, lipid profile and lipid metabolism of obesity middle - aged women. There was not substantial difference in body construction between groups. in blood lipid changes, there was a substantial difference in glucose between groups, There was not substantial difference between groups in the change of fat metabolism. In addition, there was not substantial difference in the interaction effect between time and time × group. It is expected that the results of this study will be used as basic data for related field.

• Journal of Engineering Education Research
• /
• v.23 no.6
• /
• pp.3-16
• /
• 2020

This study aims to introduce the ENACT model, which is a systematic teaching-learning model for cultivating social responsibility of science and engineering college students, and to discuss its educational implications. For the development of the ENACT model, we conducted extensive literature reviews on RRI, STEM education, and science and technology studies (STS). In addition, we examined exemplary overseas education programs emphasizing social responsibility of scientists/engineers and citizens. The ENACT model consists of five steps; 1) Engage in SSIs, 2) Navigate SSIs, 3) Anticipate consequences, 4) Conduct scientific and engineering practice, and 5) Take action. This model links Socioscientific Issues (SSI) education with engineering education, dividing the major elements of social responsibility education for scientists and engineers into the dimensions of epistemology and praxis, and reflected them in the model. This effort enables science and engineering college students to pursue more responsible and sustainable development by carrying out the responsible problem-solving process based on an understanding of the nature of science and technology. We plan to implement ENACT model based programs for science and engineering college students and to examine the effects.

• The Journal of the Korea Contents Association
• /
• v.21 no.2
• /
• pp.140-147
• /
• 2021

EEG(electroencephalogram) are measured to accurately determine the level of sleep in various sleep examinations. In general, measurements are more accurate as the number of sensor channels increases. EEG can interfere with sleep by attaching electrodes to the skin when measuring. It is necessary for self sleep care to select the minimum number of EEG channels that take into account both the user's discomfort and the accuracy of the measurement data. In this paper, we proposed a sleep stage analysis model based on machine learning and conducted experiments for using from one channel to four channels. We obtained estimation accuracy for sleep stage as following 82.28% for one channel, 85.77% for two channels, 80.33% for three channels and 68.87% for four channels. Although the measurement location is limited, the results of this study compare the accuracy according to the number of channels and provide information on the selection of channel numbers in the EEG sleep analysis.

• Journal of Advanced Navigation Technology
• /
• v.25 no.1
• /
• pp.29-39
• /
• 2021

As a means of solving traffic congestion in the downtown of large city, the interest in urban air mobility (UAM) using electric vertical take-off landing personal aerial vehicle (eVTOL PAV) is increasing. eVTOL configurations that will be used for UAM are classified by lift-and-cruise, tilt rotors, tilt-wings, tilted-ducted fans, multicopters, depending on propulsion types. This study tries to perform preliminary conceptual design for a given mission profile using reverse engineering techniques by taking the multicopter type Airbus's CityAirbus as a basic model. Wetted area, lift to drag ratio, drag coefficients were calculated using the OpenVSP which is an aerodynamic analysis software. The power required for each mission section of CityAirbus were calculated, and the corresponding battery and motor were selected. Also, total weight was predicted by estimating component weights of eVTOL.

• Journal of Advanced Navigation Technology
• /
• v.25 no.1
• /
• pp.40-51
• /
• 2021

In this paper, the design requirements was produced by analyzing domestic and foreign regulations of the vertical takeoff and landing site required to operate the urban air mobility (UAM) system in Korea and the size of the take-off and landing pads were defined, and the configuration of vertiport was proposed. First, for the metropolitan area with high population density, pilot locations of the vertical take-off and landing site were selected based on the demonstration routes suggested by the Ministry of Land, Infrastructure and Transport and analyzed the characteristics of each location and determined the number of possible installations of vertiport by measuring each site. After that, variables necessary for the operation of the vertical takeoff and landing area were set, and the hourly, daily, monthly aircraft operating cycle, the number of acceptable people, and efficiency were calculated according to the number of simultaneous operation and the number of stand. Finally, using CATIA, the configurations of the virtual vertiport was created by applying the design requirements.

• Journal of Advanced Navigation Technology
• /
• v.25 no.1
• /
• pp.8-16
• /
• 2021

In this paper, locations of vertiports were selected and evaluated to operate urban air mobility (UAM) in the Seoul metropolitan area. Demand data were analyzed using the data from the survey of commuting population and were marked on a map using MATLAB. To cluster the data, the K-means algorithm function built in MATLAB was used to identify the center of the cluster to as the location of vertiports, and using the silhouette technique, the accuracy and reliability of the clustering were evaluated. The locations of the selected vertiports were also identified using satellite maps to ensure that the locations of the selected vertiports were suitable for the actual vertiport location, and, if the location was not appropriate, final vertiports were selected through the repositioning process.