• KIPS Transactions on Computer and Communication Systems
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• v.4 no.2
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• pp.41-46
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• 2015

The demand on low power and high performance system is soaring due to the extending of mobile and small electronic device market. The 3D die-stacking technology is widely studying for next generation integration technology due to its high density and low access time. We proposed the 3D die-stacked DRAM including a reconfigurable accelerator in a logic layer of DRAM. Also we discuss and suggest a cache-based local memory for a reconfigurable accelerator in a logic layer. The reconfigurable accelerator in logic layer of 3D die-stacked DRAM reduces the overhead of data management and transfer due to the characteristics of its location, so that can increase the performance highly. The proposed system archives 24.8 speedup in maximum.

• Smart Media Journal
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• v.6 no.4
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• pp.50-57
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• 2017

As the construction sites are far from the construction site offices, the construction workers perform work on the sites with a variety of reference books and materials. This inconvenience may lead to construction accidents, and as such, the demand for mobile app development for simplifying work is increasing. Therefore, in this study, the trends of mobile research and mobile app development, and their application to the construction field were investigated to develop a mobile app that would help construction workers process their work. Based on this, mobile services applicable to construction sites and work process improvement plans were proposed. To apply the proposed work process, the functions of the existing construction project management system were improved, and a mobile app that could be used in both the Android and iOS environments was developed.

• Proceedings of the Korean Information Science Society Conference
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• 2012.06d
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• pp.70-72
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• 2012

최근 휴대용 기기들이 대중화되어 한사람이 하나 이상의 휴대용 기기를 소지하고 있고 스마트폰 활용도 또한 늘어나는 추세이다. 때문에 폭발적인 스마트폰 응용 활용이 늘어나고 있지만 현재의 애플리케이션 스토어는 각 플랫폼별로 애플리케이션을 개발해줘야 하는 종속적인 면이 있다. 앱스토어는 크게 애플의 앱스토어와 구글의 안드로이드 마켓으로 양분되어 있고 각 플랫폼에 맞춰 애플리케이션이 개발되어야 한다. 각각의 플랫폼에 맞춰서 애플리케이션을 개발하면 비용도 더 들고 다른 소규모 플랫폼(Ex 바다)들은 애플리케이션 개발자들을 끌어 모아야만 자신들의 플랫폼에 맞는 애플리케이션이 나오는 단점이 있다. 각 플랫폼에 맞춰서 개발된 네이티브 애플리케이션의 범용성에 대한 해결책과 모바일에서의 다양한 요구사항을 수용하기 위해 웹 애플리케이션이 각광받고 있다. 웹 애플리케이션은 플랫폼에 종속되지 않고 어느 휴대용 기기에서도 동작하기 때문에 각 플랫폼별로 개발하지 않아도 된다. 따라서 웹 애플리케이션 스토어끼리의 연동 프로토콜을 통하여 애플리케이션들을 어느 웹 애플리케이션 스토어에서도 볼 수 있고 플랫폼에 구애받지 않는 거대한 시장이 생겨날 수 있다. 하지만 아직 웹 애플리케이션 스토어라는 표준이 없고 존재하는 웹 애플리케이션 스토어가 없다. 이를 위해 본 논문에서는 연동에 관한 프로토콜을 제안한다.

• Journal of IKEEE
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• v.19 no.1
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• pp.101-109
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• 2015

As the number of smartphone users grows, number of applications and the expected overall functionality in a smartphone grow simultaneously. With ever-so increasing expectations comes intense competition to squeeze in myriads of functions in a limited space that is only getting 'slimmer' by the year. In order to achieve this, companies often decrease the size of components in smartphones - battery connectors in particular. While they may fit, smaller battery connectors have their disadvantages due to the heat generated by the high current flow in the circuits. In collaborating with Korea's leading battery connector manufacturers, this research presents current issues and design concepts that should be considered when engineers design power connectors based on their electrical and thermal analysis.

• Journal of the Economic Geographical Society of Korea
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• v.22 no.1
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• pp.1-17
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• 2019

The purpose of this paper is to examine the spatial characteristics of the medical device industry in accordance with the promotion of regional industrial policy. For this aim, I suggest a research methodology that can examine the productivity of production activity and the profitability of sales activity by the government. As the government's large-scale support is localized by the 'selective support' method, the spatial characteristics of the productivity and profitability of the industry are different. In this context, the results of the review of the government's regional industrial policy in three aspects are as follows. First, the government's support did not come down to increased productivity and profitability. Second, high productivity at the regional level did not necessarily lead to high profitability. Finally, the high market share in terms of profitability did not guarantee high profits. Therefore, it is necessary for the government to reconsider the direction of regional industrial policy so that the link between productivity and profitability can be secured in the examination of the achievement of industrial specificity and policy support.

• Journal of Internet of Things and Convergence
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• v.8 no.3
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• pp.41-46
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• 2022

Smart home in the Internet of Things (IoT) environment aims to provide an optimal living environment for users by connecting all devices in the home. In such a smart home environment, artificial intelligence speakers are being used as a way to manage and control all devices. The existing speaker function is changing from simple music playback to the role of an interface that controls and manages all devices in the smart home space. This study dealt with the market status and usability analysis in the US and Korea, the leader in artificial intelligence speakers. The main target companies were Amazon, Google, and Apple in the US, as well as Kakao, SKT, and KT in Korea. In addition, based on the reaction results of domestic users to artificial intelligence speakers, the derivation of major problems and directions for improvement were described.

• Convergence Security Journal
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• v.22 no.2
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• pp.43-50
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• 2022

It is no exaggeration to say that mobile devices have already become an essential tool in our daily life. Among these mobile devices, a representative smart phone is overheating the market by introducing new functions and services whenever a new product is released. However, most users do not know that there are various vulnerabilities depending on the manufacturer, service, or function, and damage is occurring due to attacks that exploit the vulnerabilities.Research on this has already been conducted, but it is very difficult to predict because there are various differences depending on new devices, operating systems, services, and functions. For this reason, it is necessary to continuously monitor and study new vulnerable factors. Therefore, through this study, research so far, vulnerabilities, attack technology, and response technology were considered. In addition, it is expected that it can be used as basic data for the development of systems and response technologies in the future by proposing countermeasures.

• Information Systems Review
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• v.10 no.3
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• pp.21-38
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• 2008

After the introduction stage, Korean mobile game market is approaching to the growing stage leading mobile contents market. The environment for the mobile contents business is getting better by the expansion of the 3G mobile networks and the enhancement of the mobile devices. In this research, at a content level, not a service level, market success factors of mobile games and the differences by genres and their changes over time were investigated through the analysis of the real market data of mobile games launched by a Korean mobile carrier. The most important factors for market success, especially for the genres of RPG/Tycoon/Simulation and Shooting/Action/Arcade, were found to be the 'design' factor and its effect turned to be getting stronger as time goes by after the launch. Consumers' purchase rate was actually higher for the mobile games of popular genres or in relation with socially popular subject matters. Also 'design' and 'creativity' factors which are related to the quality of contents, have gotten more important over time. One of the most interesting results was that there existed a "blue ocean" genres like Sports/Racing/Leisure which had a steady demand but not many competing games. In the analysis of the 'convenience' factor, one interesting implication for mobile game producers was that there exists a trade off between the ease of initial adoption and the steady sales of a mobile game.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2018.10a
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• pp.400-403
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• 2018

The VR / AR market has grown significantly due to the development of Virtual Reality and Augmented Reality, the core technologies of the Fourth Industrial Revolution. According to a report released by the Korea Science and Engineering Corporation (KISTEP), the global VR / AR market will grow to $ 105 billion by 2022. An important key to the growth of the VR / AR market is user immersion. VR is dependent on technology of hardware such as display and sensor for biometric signal recognition. In order to improve user's immersion feeling, it is important to transmit sensor data to display device more accurately and quickly. In this paper, we consider various sensor hardware dependencies of VR, and compare various correction methods and filtering methods to lower the Motion to Photon (MTP) time that user movement is fully reflected on the display using sensor devices.

• Journal of Korea Port Economic Association
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• v.36 no.4
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• pp.107-120
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• 2020

This study analyzed the competitiveness of major export industries following the FTA between Korea and five Central American countries. Findings revealed that Korea mainly exports industrial products such as ships, automobiles and parts, steel, and electronic devices, and it imports raw materials and agricultural products such as coffee and copper, indicating a complementary trade structure. Similarly, the trade specialization index analysis revealed that Korea specialized in exporting industrial products such as ships, automobiles, steel, and machinery, and in importing primary products such as copper and coffee. Products such as ships, steel, and machinery, which are major export items to Central America, are expected to further strengthen their competitiveness due to tariff cuts. In addition, it is expected that the demand for medicines and medical supplies could increase in future due to the COVID-19 pandemic. This study attempted to present implications for establishing export strategies by analyzing the competitiveness of Korea's major export industries in the Central American market, in accordance with the Korean-Central American FTA. These findings could be used as basic data for future entry into South America as a bridgehead in the Central American market.