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A Study on Touchless Panel based Interactive Contents Service using IrDA Matrix
Lee, Minwoo,Lee, Dongwoo,Kim, Daehyeon,Ann, Myungsuk,Lee, Junghoon,Lee, Seungyoun,Cho, Juphil,Shin, Jaekwon,Cha, Jaesang The Institute of Internet 2015 International Journal of Internet, Broadcasting an Vol.7 No.2
Touch panel is mainly applied to pressure type touch panel but it occur a low recognition rate and error during long-term use. So, it is partly applied to capacitive touch panel to compensate for these problems but it also can occur a same problems via pollutions. Touch technology has developed a various method but it is not used because of high costs and difficult installation process. So, in this paper, we proposed an input method of touchless panel using IrDA matrix. This method is conducted using an IrDA Matrix composed of depth sensor. It is possible to offer a various contents for multi user. The proposed technology need a development of a high sensitivity sensing method and high-speed processing method of position information for Seamless operation control. And, it is required high-precision drive technology. Also, we proposed a Seamless user recognition for interactive contents service through a touchless panel using IrDA matrix.
Reducing the Memory Bandwidth Overheads of Hardware Security Support for Multi-Core Processors
Junghoon Lee,Taehoon Kim,Jaehyuk Huh IEEE 2016 IEEE Transactions on Computers Vol. No.
<P>To prevent physical attacks on systems, secure processors have been proposed to reduce trusted computing base to the processor itself. In a secure processor, all off-chip data are encrypted and their integrity is protected. This paper investigates how the limited memory bandwidth of multi-core processors affects the design of secure processors. Although the performance of a single-core secure processor has improved significantly with the counter-mode encryption combined with Bonsai Merkle Tree, our results indicate that multi-core secure processors can suffer from significant performance degradation due to the limited memory bandwidth. To mitigate the performance overheads, this paper proposes three techniques for the multi-core design of secure processors. First, the paper advocates to use a combined cache for all normal and security-supporting data. Second, the paper proposes memory scheduling and mapping schemes for secure processors. Finally, the paper investigates a type-aware cache insertion scheme considering the distinct characteristics of normal and security-supporting data. Our simulation results show that the combined techniques reduce the performance degradation for supporting full confidentiality and integrity, from 25-34 percent to less than 8-14 percent in 8-core and 16-core secure processors, with minimal extra hardware costs.</P>
Design of an Extensive Emergency Rescue Service for Electric Vehicles
Junghoon Lee,Hyobin Kim,Gyung-Leen Park 보안공학연구지원센터 2014 International Journal of Control and Automation Vol.7 No.10
This paper designs and develops an emergency rescue service for electric vehicles (EVs), which may suffer from the battery depletion during their trips. After building relevant data models on both chargers and EVs, our design defines the interaction among three parties of EV drivers, the rescue server, and rescue vehicles to responsively process the dispatch request and systematically meet the user requirement. Particularly, a comprehensive mobile application is developed on the Android operating system to help users to promptly send a rescue request to the server and monitor the request processing status. This user interface allows EV drivers to automatically specify their locations and necessary personal information as well as to view the distribution of emergency vehicles through user-friendly maps. Our design is scalable for a large number of emergency vehicles and rescue requests, accelerating the wide deployment of EVs in our daily lives. Moreover, the rescue system design can collaborate with an EV tracking system and charge reservation agents to create a more sophisticated EV information service.
Junghoon Ki,Soonae Park,Youngsung Lee,Youngmi Lee 인간식물환경학회 2019 인간식물환경학회지 Vol.22 No.3
This study presents the standards for desirable local transfer of public affairs by analyzing the perceptions of experts in the academia and research institutes, as well as public officials in the environmental sector in charge of environmental affairs. The results of this study tend to be partially consistent with the results of previous studies that there is a difference in perception among respondents depending on the affiliation of experts and public officials. Among the policy tasks, there was a statistically significant difference among the respondents in perception of responsible agent for carrying out sustainable land planning and management. Regarding general environmental affairs, there was a statistically significant difference among pubic officials in different affiliations in perception of responsible executive agent for natural environment, living environment, and resource circulation.
Lee, Junghoon 濟州大學校 基礎科學硏究所 2002 基礎科學硏究 Vol.15 No.2
본 논문은 IEEE 802.11 Wireless LAN에서의 실시간 통신에 대해 가능한 많은 손실된 메시지들을 종료시한 내에 처리할 수 있도록 폴링 스케줄을 동적으로 조절할 수 있는 에러 제어 기법을 제안한다. 조정자인 AP는 네트워크 내의 노드가 현재 오류 제어 절차를 수행하고 있는지 여부와 CP 구간마다 현재의 비동기 트래픽에 여유가 있는지 등을 감시하며 가능한 경우를 판단하여 CP를 조기에 종결시켜 다음 CFP의 기간을 연장시킨다. CFP 시간은 AP에 의해 현재 오류제어를 수행중인 노드에 더 많은 폴을 부여함으로써 종료시한 이내에 회복된 메시지의 수를 증가시킬 수 있다. SMPL을 통해 수행된 모의실험 결과는 WLAN에서의 실시간 통신을 위한 기존의 에러 제어 기법에 비해 이 적응 기법이 전송 에러 때문에 버려지는 메시지를 5.5%까지 줄일 수 있다는 것을 보였다. This paper proposes an error control scheme that dynamically adjusts the polling schedule so that more corrupted messages can be manipulated within their deadlines for real-time communication on IEEE 802.11 Wireless LAN Monitoring the current traffic on CP interval as well as inspecting whether a node is executing an error control procedure, AP terminates CP, if possible, to extend the duration of the next CFP. With the enlarged time, AP gives more polls to the node in need to increase the number of timely recovered messages. Simulation result performed via SMPL shows that this adaptation scheme can reduce the message discard due to transmission error by 5.5%, compared with the existing error controls method for real-time communication on WLAN.