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- 저자 : ( Yuefeng Ji ) (검색결과 4 건)
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Yuefeng Ji,Jigai Li,Chunping Chen,Chunxiang Piao,Xin Zhou,윤주영 한국생체재료학회 2024 생체재료학회지 Vol.28 No.00
The rapid identification of bacterial Gram types and their viability, as well as efficient bacterial elimination are crucial for managing bacterial infections yet present important challenges. In this research, we utilized long-chain-tailed BODIPY derivatives to address these hurdles. Our data indicated that these derivatives can distinguish bacteria types and their viability in aqueous solutions through a concise turn-on fluorescent response. Among them, B-8 stained both live and dead bacteria, and B-14 offered a wash-free staining. B-18 demonstrated the highest affinity to selectively fluorescent label viable gram-positive bacteria with a 53.2-fold fluorescent enhancement. Confocal imaging confirmed that B-18 can serve as an effective membrane-specific probe for facilitating the typing between gram-negative and gram-positive bacteria in a wash-free manner. Additionally, B-18 displayed selective photodynamic inactivation at 1 μM toward gram-positive bacteria. In vivo studies variformed the ideal photodynamic therapeutic efficacy of B-18 against methicillin-resistant Staphylococcus aureus in mice wound infections.
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Multipath Routing and Spectrum Allocation for Network Coding Enabled Elastic Optical Networks
Xin Wang,Yuefeng Ji,Rentao Gu 한국광학회 2017 Current Optics and Photonics Vol.1 No.5
The benefits of network coding in all-optical multicast networks have been widely demonstrated. Inthis paper, we mainly discuss the multicast service efficiently provisioning problem in the network codingenabled elastic optical networks (EONs). Although most research on routing and spectrum allocation (RSA)has been widely studied in the elastic optical networks (EONs), rare research studies RSA for multicastin the network coding enabled EON, especially considering the time delay constraint. We propose anefficient heuristic algorithm, called Network Coding based Multicast Capable-Multipath Routing andSpectrum Allocation (NCMC-MRSA) to solve the multipath RSA for multicast services in the networkcoding enabled EON. The well-known layered graph approach is utilized for NCMC-MRSA, and tworequest ordering strategies are utilized for multiple multicast requests. From the simulation results, weobserve that the proposed algorithm NCMC-MRSA performs more efficient spectrum utilization comparedwith the benchmark algorithms. NCMC-MRSA utilizing the spectrum request balancing (SRB) orderingstrategy shows the most efficient spectrum utilization performance among other algorithms in most testnetworks. Note that we also observe that the efficiency of NCMC-MRSA shows more obvious than thebenchmark algorithm in large networks. We also conduct the performance comparisons of two requestordering strategies for NCMC-MRSA. Besides, we also evaluate the impact of the number of the linkdisjointparallel w paths on the spectrum utilization performance of the proposed algorithm NCMC-MRSA. It is interesting to find that the change of the parameter w in a certain range has a significant impacton the performance of NCMC-MRSA. As the parameter w increases to a certain value, the performancesof NCMC-MRSA cannot be affected by the change of w any more.
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Zhitong Huang,Jieqing Xiong,Jianfeng Li,Yuefeng Ji 한국광학회 2015 Current Optics and Photonics Vol.19 No.4
Visible light communication (VLC) is considered to be an attractive scheme to realize the broadbandwireless communication for an indoor environment. We present a room division multiplexing (RDM)mechanism for an indoor multi-room VLC network, which utilizes the spatial position of the LED lampin different rooms as a novel dimension of network resource for multiplexing, and thus the network capacityis increased. In such a network, the service interruption caused by user cross-room movement is animportant problem, and we propose a double-area-positioning based cross-room switch solution. Anexperimental platform demonstrates the RDM-deployed VLC network, and validates the performance ofthe presented switch mechanism
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A QoS-aware Adaptive Coloring Scheduling Algorithm for Co-located WBANs
( Jingxian Wang ),( Yongmei Sun ),( Shuyun Luo ),( Yuefeng Ji ) 한국인터넷정보학회 2018 KSII Transactions on Internet and Information Syst Vol.12 No.12
Interference may occur when several co-located wireless body area networks (WBANs) share the same channel simultaneously, which is compressed by resource scheduling generally. In this paper, a QoS-aware Adaptive Coloring (QAC) scheduling algorithm is proposed, which contains two components: interference sets determination and time slots assignment. The highlight of QAC is to determine the interference graph based on the relay scheme and adapted to the network QoS by multi-coloring approach. However, the frequent resource assignment brings in extra energy consumption and packet loss. Thus we come up with a launch condition for the QAC scheduling algorithm, that is if the interference duration is longer than a threshold predetermined, time slots rescheduling is activated. Furthermore, based on the relative distance and moving speed between WBANs, a prediction model for interference duration is proposed. The simulation results show that compared with the state-of-the-art approaches, the QAC scheduling algorithm has better performance in terms of network capacity, average delay and resource utility.
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