• Archives of design research
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• v.12 no.4
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• pp.119-128
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• 1999

Product opportunity analysis in product planning is to analyze the feasibility for success over the detail product concept, and to grasp the new possible market based on exploring the trends of market and product itself. Therefore, the correct analysis and insight with various data of product and market is needed for product opportunity analysis. As product environment changes rapidly, it is especially important to collect more plentiful informations, and to put these information to practical use pertinently. It is consequently indispensible to clarify the types of information to be needed and to construct product database. However, there has no meaning to gather simple information which is lying here and there. Product database has to be systematically organized and each product information is to be transformed into contextual one. This study clarifies a conceptual framework of product design database based on product attributes and develops prototype of product database for product planning. Case study of camera is exemplified for analyzing the product trends and exploring product opportunity with developed product database.

• Asia-Pacific Journal of Business Venturing and Entrepreneurship
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• v.16 no.5
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• pp.177-187
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• 2021

This study was conducted for the purpose of exploring the experiences of workers with disabilities on job change according to the COVID-19 situation. To this end, the data from the 2020 survey on economic activity for the disabled and data from the National Statistical Office were used, and the analysis was conducted using a literature study method. The results were as follows. First, COVID-19 had caused a change in the working pattern of wage workers with disabilities. Second, the degree of employment security for the disabled had deteriorated after COVID-19. Third, non-wage workers were experiencing difficulties in business operation due to COVID-19. Fourth, it had affected the resignation due to COVID-19. Fifth, there were difficulties in finding a job due to COVID-19. Through this, it was found that the economic activities of the disabled were being greatly restricted due to COVID-19. Accordingly, a proposal for a solution was made. This study is meaningful in that it explored the instability of the domestic disabled people's labor market due to COVID-19 based on data.

• Korean Journal of School Psychology
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• v.17 no.1
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• pp.1-16
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• 2020

This study aims to investigate peer socialization processes on early adolescents' prosocial behaviors in friendship networks. A longitudinal social network model (SIENA) was used to disentangle socialization process in prosocial behavior. Participants were fourth and fifth graders in South Korea from 39 elementary school classrooms (N=1,040, 48% girls). According to results, students select friends based on similarity in prosocial behavior (peer selection) was found in both prosocial behaviors. Peer influence effects were also observed in prosocial behaviors. Also, moderating effect of social relatedness was significant. In classes with high social relatedness, influence effect of prosocial behavior was significant. As a contrast, prosocial behavior was not socialized in classes with the low social relatedness. Results suggest that peernetwork play a critical role in the co-evolution of friendships, and prosocial behaviors. Findings yielded the importance of the socialization process and promoting healthy peer socialization environment.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2022.10a
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• pp.219-221
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• 2022

In recent summer, as it is concentrated, even in mountainous areas, flooding and flooding cause casualties in pedestrian evacuation situations. To compensate for this, a system that detects the occurrence of flooding and allows pedestrians to evacuate safely is required. Therefore, in this paper, we propose a research on pedestrian path search based on the shortest distance algorithm using Map API. The pedestrian route search system outputs a map using the T Map API, selects nearby buildings as shelters, and stores data. A shelter close to the pedestrian's current location is selected, and the shortest route is output and the distance and time are provided. If there is a problem with the current route during evacuation, another shelter route is provided from the current location. Therefore, it is thought that the pedestrian route search evacuation system proposed in this paper will prevent accidents during evacuation.

• Convergence Security Journal
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• v.23 no.5
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• pp.91-100
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• 2023

Vehicles are changing in the direction of utilizing various ICT technologies. Accordingly a number of software has been installed in vehicles, resulting in cybersecurity threats such as hacking. So each country is preparing legal regulations to secure vehicles cybersecurity. However, the enactment of legal regulations is bound to be relatively slow compared to the speed of development of vehicles technology, so it is necessary to revise the legal regulations by continuously monitoring of vehicles technology development trends. In this study, we search and analyze the latest vehicles cybersecurity patent applications to explore new technologies that require supplementation of vehicles cybersecurity. Threat technologies/security requirements for new technologies are presented through patent analysis

• Journal of the HCI Society of Korea
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• v.13 no.4
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• pp.25-34
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• 2018

This study is a literature study that analyzes empirical case study of Flipped learning application which has emerged as a method of future university education in Korea. The purpose of the study is to explore the use of digital media by learners in the Flipped learning applied courses in domestic universities considering current digital-based media environment. For this purpose, we analyzed the measurement variables and statistical significance of the preceding studies and analyzed the media utilization. The most important measurement variables were 'learning achievement' and 'class satisfaction', which were measures of effectiveness on the Flipped learning classes. All studies analyzed used media, but most studies focused on verifying the effectiveness of classroom classes, resulting in separate media utilization measurements in one study and statistically meaningful results for the 'video learning recognition' variable. The qualitative measurement related to the use of media for each study was presented as a separate analysis result. In the future, in order for effective follow-up studies on application of Flipped learning and digital media utilization, there are five main issues that need to be studied, which are securing the necessary treatment period for accurate effect measurement, etc.

• The Journal of the Korea Contents Association
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• v.21 no.4
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• pp.424-433
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• 2021

The aim of this study is to explores the possibility of applying new aquaponics using guppies, a tropical fish breeding as companion fish at home, different from the aquaponics system using fish species such as loach, carp, and catfish for commercial purposes. To facilitate the application of Aquaponics at home, a system was established by connecting a water tank, water plants, hydroponic pots, plant growth LEDs, and Arduino sensors using Internet of Things(IoT) technology. As a hydroponic crops, lettuce that can be easily obtained and consumed at home was selected. In order to confirm the applicability of aquaponics using tropical fish, the growth rates of hydroponic crops in the same environment were compared as a control. The growth rate of aquaponics crops using tropical fish was about 77.4% of that of hydroponic crops. This will produce the same effect as hydroponic cultivation if conditions correspond with enough fish quantity to feed plant and appropriate pH control for growth are met. It can be seen that, and in the future, it can be used to develop an Aquaphonics standard system applicable at home.

• Proceedings of the Korean Society of Applied Pharmacology
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• 1994.04a
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• pp.183-183
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• 1994

HIV-1 protcase 를 이용한 in vitro assay system을 개발하기 위하여HIV-1 protease유전자를 Ecoli 발현 벡터를 이용하여 발현시켰다. 가능성있는 Protease유전자의 생간 및 분래를 용이하게 하기위하여 maltose binding protein 의 fusion protein을 이용하였으며 protease 의 autoprocessing을 maltose binding protein 의 polyclonal 항체로 확인하였다, 발현된 protease는 일련의 chromatography 방법 (DEAE, SE cellulose, Superose 12, Mono S) 으로 순수하게 분리되었다. 정제된 protease 는 SDS-PAGE분석으로 단일밴드를 보여주었고, 합성된 undecapeptide를 기질로 하였을때 Km 이 9.8$\mu$M 이었다. 효소 assay 를 위해 기질이 protease 에 의해 절단된 생성물을 HPLC를 사용하여 분석하였다. Protease의 억제제 탐색을 위해 유기합성한 몇개의 기질유사체와 HIV-1 증식을 억제하는 것으로 알려진 천연물의 억제정도를 조사하여 보았다. 이들 test 에 사용한 물질들은 높은 농도에서 protease 의 활성을 저해하는 것으로 보아 좋은 억제제는 아닌것으로 시료되나 본 연구를 통하여 확립된 in vitro assay system 은 추후에도 억제제 탐색을 위하여 계속 활용될 수 있을 것이다.

• Proceedings of the Korean Information Science Society Conference
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• 2007.06d
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• pp.58-62
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• 2007

기존의 무선 Ad-hoc 네트워크의 연구는 라우팅기법에 중심으로 이뤄지고 있다. 그러나 기존의 연구들은 네트워크를 구성하는 각 요소들이 우호적이며 상호 협력적인 상황을 가정하여 연구가 이루어지고 있다. 그러나 최근 연구에는 안전한 통신을 보장하기 위한 보안 알고리즘의 필요성에 집중되고 있다. 무선 Ad-hoc 네트워크에서의 악의적인 노드를 식별하는 방안들은 정상적인 노드임에도 불구하고 거짓으로 신고했을 때 확인절차 없이 경로를 재탐색하여 최적의 경로를 변경시킴으로서 최적의 전송환경을 활용하지 못하는 문제점이 있다. 본 논문에서는 다중경로 기반의 보안경로 탐색 프로토콜인 MP-SAR 프로토콜을 이용하여 보안경로에서는 악의적인 노드를 검증하고, 유효한 최단경로를 통해 데이터전송을 하는 기법을 제안하고자 한다. 제안한 기법을 적용함으로써 노드에 대한 신고가 있을 때 확인과정을 거쳐 불필요하게 경로를 재탐색하는 과정을 줄일 수 있다.

• Proceedings of the Korea Multimedia Society Conference
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• 2002.05d
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• pp.1146-1150
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• 2002

멀티미디어 데이터 처리나 암호화 알고리즘같은 계산량이 많고 마른 시간안에 처리되어야하는 어플리케이션들을 처리하기 위하여 최근의 컴퓨팅 환경은 재구성가능한 시스템과 일반적인 마이크로 프로세서가 결합된 시스템을 폭넓게 활용하고 있다. 이러한 시스템의 시장적응성을 높이기 위해서는 프로토타입을 제작하기 전에 설계변수에 따른 성능수치를 이미 예측하여 최소의 비용으로 시스템의 수행시간 및 자원제약사향을 만족할 수 있는 구조를 찾아내는 것이 필수적이다. 본 논문에서는 Y-chart 설계방법의 기본 개념을 Hybrid 시스템에 적용가능하도록 확장하여, 재구성 가능한 시뮬레이터를 개발하였고, 이를 기반으로 H.263 인코더 모델을 어플리케이션모델로 하고 FPGA와 일반적인 프로세서를 사용하는 가상의 시스템을 하드웨어 모델로하여 설계공간탐색을 진행하였다. 설계공간 탐색을 통한 시뮬레이션 결과는 시스템 설계자들에게 실제 포로토타입을 구축하지 않고 최적의 설계변수를 결정할 수 있게 하여 설계시간과 설계비용을 현저하게 줄여줄 것으로 기대된다.