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Localized Mobility Management in MPLS-based Access Networks
Javier Carmona-Murillo,Jose-Luis Gonzalez-Sanchez,Francisco-Javier Rodriguez-Per,David Cortes-Polo 한국산학기술학회 2012 SmartCR Vol.2 No.2
The continuous efforts made towards efficient mobility management in next-generation wireless networks are one of the major challenges for next-generation mobile systems. To track host mobility, the IETF has developed some mobility management protocols such as Mobile IP and Proxy Mobile IPv6. These protocols set up a tunnel to forward packets to the mobile node while the user is away from its home network. The tunneling method provided by Multi-Protocol Label Switching can be profitably used to take advantage of the Multi-Protocol Label Switching traffic engineering capability to achieve fast-reroute when a mobile node changes its point of attachment to the network. Moreover, service disruption during handoffs causes excessive packet loss that needs to be minimized to support quality of service requirements of emerging applications. We present a performance evaluation and numerical results of the most representative host-based and network-based mobility management approaches. We highlight the importance of the tunneling method with special attention to those protocols that have integrated Multi-Protocol Label Switching in its access network.
Leveling: an Efficient VLC for Lossless Data Compression
Javier Joglar Alcubilla 보안공학연구지원센터 2016 International Journal of Signal Processing, Image Vol.9 No.3
Many of the standard compression methods are based, at their lowest level, in coding digital words of variable length or VLC, Huffman type, designed in 1952 or in any of its versions, as canonical. This article presents an VLC with greater efficiency than Huffman encoding, named as “Leveling”, which uses two variants, “Leveled Reordering” for low redundancy, e.g. for text and, “Segmented Leveling” for middle and high redundancy, for image processing. Leveling, developed by Javier Joglar in 1995, uses the concepts of “meaning” and “ordering” of the VLC codes generated, to get optimum performance in terms of “compression ratio”, higher than any other non-adaptive VLC.
Javier Vázquez,JoséLuis Sánchez-Rojás 한국물리학회 2009 Current Applied Physics Vol.9 No.3
The present work investigates, using simulation computer tools and fluorescence microscopy experimental assays, the local distribution of short single-stranded oligonucleotide fragments accumulated on a single microelectrode after the switching of an external dc electrical stimulus for some seconds (up to 75 s). It contributes to fill the existing gap in active microelectronic DNA arrays, where due to the large number of microelectrodes contained in the devices, no or little attention has been given to the final coverage of the individual electrodes by the DNA probes transported onto them, and how it is influenced by the device geometry and other variables like the current magnitude and the transport time. All these parameters play a fundamental role in both the accumulation rate of DNA strands on a polarized electrode and the degree of symmetry of their final distribution, which is convenient to know prior to any active microarray layout design in order to optimize the device performance. The present work investigates, using simulation computer tools and fluorescence microscopy experimental assays, the local distribution of short single-stranded oligonucleotide fragments accumulated on a single microelectrode after the switching of an external dc electrical stimulus for some seconds (up to 75 s). It contributes to fill the existing gap in active microelectronic DNA arrays, where due to the large number of microelectrodes contained in the devices, no or little attention has been given to the final coverage of the individual electrodes by the DNA probes transported onto them, and how it is influenced by the device geometry and other variables like the current magnitude and the transport time. All these parameters play a fundamental role in both the accumulation rate of DNA strands on a polarized electrode and the degree of symmetry of their final distribution, which is convenient to know prior to any active microarray layout design in order to optimize the device performance.
DrivingStyles: A Mobile Platform for Driving Styles and Fuel Consumption Characterization
Javier E. Meseguer,Chai Keong Toh,Carlos T. Calafate,Juan-Carlos Cano,Pietro Manzoni 한국통신학회 2017 Journal of communications and networks Vol.19 No.2
Intelligent transportation systems (ITS) rely on connectedvehicle applications to address real-world problems. Researchis currently being conducted to support safety, mobility andenvironmental applications. This paper presents the DrivingStylesarchitecture, which adopts data mining techniques and neural networksto analyze and generate a classification of driving styles andfuel consumption based on driver characterization. In particular,we have implemented an algorithm that is able to characterize thedegree of aggressiveness of each driver. We have also developed amethodology to calculate, in real-time, the consumption and environmentalimpact of spark ignition and diesel vehicles from a set ofvariables obtained from the vehicle’s electronic control unit (ECU). In this paper, we demonstrate the impact of the driving style onfuel consumption, as well as its correlation with the greenhouse gasemissions generated by each vehicle. Overall, our platform is ableto assist drivers in correcting their bad driving habits, while offeringhelpful tips to improve fuel economy and driving safety.
Modular design and control of an upper limb exoskeleton
Javier Garrido,Wen Yu,Xiaoou Li 대한기계학회 2016 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.30 No.5
In this paper, we use modular design method to construct an upper limb exoskeleton. This new design method is more simple and easy for exoskeletons than the other techniques, and it is facility to be extended into more joints robots. We also propose a novel admittance control, which works in task space. The admittance control has PID form, and does not need the inverse kinematic and the dynamic model of the exoskeleton. The experimental results show that both the design and the controller work well for the upper limb exoskeleton.