This book, written by two major figures in adaptive control, provides a wealth of material for researchers, practitioners, and students. While some researchers in adaptive control may note the absence of a particular topic, the book‘s scope represents a high-gain instrument. It can be used by designers of control systems to enhance their work through the information on many new theoretical developments, and can be used by mathematical control theory specialists to adapt their research to practical needs. The book is strongly recommended to anyone interested in adaptive control.

Adaptive Control

A remote controlled robot system that includes a robot and a remote control station. The robot includes a binaural microphone system that is coupled to a speaker system of the remote control station. The binaural microphone system may include a pair of microphones located at opposite sides of a robot head. the location of the microphones roughly coincides with the location of ears on a human body. Such microphone location creates a mobile robot that more effectively simulates the tele-presence of an operator of the system. The robot may include two different microphone systems and the ability to switch between systems. For example, the robot may also include a zoom camera system and a directional microphone. The directional microphone may be utilized to capture sound from a direction that corresponds to an object zoomed upon by the camera system.

Mobile tele-presence system with a microphone system

A remote controlled robot with a head that supports a monitor and is coupled to a mobile platform. The mobile robot also includes an auxiliary camera coupled to the mobile platform by a boom. The mobile robot is controlled by a remote control station. By way of example, the robot can be remotely moved about an operating room. The auxiliary camera extends from the boom so that it provides a relatively close view of a patient or other item in the room. An assistant in the operating room may move the boom and the camera. The boom may be connected to a robot head that can be remotely moved by the remote control station.

Telepresence robot with a camera boom

With the rapid development of the Intelligent Transportation System (ITS), vehicular communication networks have been widely studied in recent years. Dedicated Short Range Communication (DSRC) can provide efficient real-time information exchange among vehicles without the need of pervasive roadside communication infrastructure. Although mobile cellular networks are capable of providing wide coverage for vehicular users, the requirements of services that require stringent real-time safety cannot always be guaranteed by cellular networks. Therefore, the Heterogeneous Vehicular NETwork (HetVNET), which integrates cellular networks with DSRC, is a potential solution for meeting the communication requirements of the ITS. Although there are a plethora of reported studies on either DSRC or cellular networks, joint research of these two areas is still at its infancy. This paper provides a comprehensive survey on recent wireless networks techniques applied to HetVNETs. Firstly, the requirements and use cases of safety and non-safety services are summarized and compared. Consequently, a HetVNET framework that utilizes a variety of wireless networking techniques is presented, followed by the descriptions of various applications for some typical scenarios. Building such HetVNETs requires a deep understanding of heterogeneity and its associated challenges. Thus, major challenges and solutions that are related to both the Medium Access Control (MAC) and network layers in HetVNETs are studied and discussed in detail. Finally, we outline open issues that help to identify new research directions in HetVNETs.

Heterogeneous Vehicular Networking: A Survey on Architecture, Challenges, and Solutions

As the rapid development of automotive telematics, modern vehicles are expected to be connected through heterogeneous radio access technologies and are able to exchange massive information with their surrounding environment. By significantly expanding the network scale and conducting both real time and long term information processing, the traditional Vehicular Ad- Hoc Networks U+0028 VANETs U+0029 are evolving to the Internet of Vehicles U+0028 IoV U+0029, which promises efficient and intelligent prospect for the future transportation system. On the other hand, vehicles are not only consuming but also generating a huge amount and enormous types of data, which are referred to as Big Data. In this article, we first investigate the relationship between IoV and big data in vehicular environment, mainly on how IoV supports the transmission, storage, computing of the big data, and in return how IoV benefits from big data in terms of IoV characterization, performance evaluation and big data assisted communication protocol design. We then investigate the application of IoV big data for autonomous vehicles. Finally the emerging issues of the big data enabled IoV are discussed.

Internet of vehicles in big data era

The present invention relates to a cleaning policy and a method for recovering error in a file system using flash memory; and, more particularly, to a ranked cleaning policy in a file system using flash memory which can be used effectively and longer by dividing it into segments, adopting the ranked cleaning policy and arranging cleaned spaces evenly, and to an error recovery method in a file system using flash memory which can recover error by subdividing cleaning status when sudden power error is caused, as well as to a computer-based recording medium for recording a program to embody the methods above. A method for ranked cleaning policy in file systems using flash memory, the method comprising the steps of: calculating rank values for all segments of the flash memory periodically; and if the storable space of the flash memory becomes less than a predetermined volume, a cleaner operating to clean invalid space of segments in order of their rank values obtained in the previous step high to low and thus to secure new storage space.

Ranked cleaning policy and error recovery method for file systems using flash memory

This paper proposes a medium access control (MAC) algorithm, called Cooperative Diversity MAC (CD-MAC), which exploits the cooperative communication capability to improve robustness in wireless ad hoc networks. In CD-MAC, each terminal proactively selects a relay for cooperation and lets it transmit simultaneously when it is beneficial in mitigating interference from nearby terminals and thus improving the network performance. For practicability, CD-MAC is designed based on the widely adopted IEEE 802.11 MAC. System-level simulation study shows that CD-MAC significantly outperforms the original IEEE 802.11 MAC in terms of packet delivery ratio.

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CD-MAC: Cooperative Diversity MAC for Robust Communication in Wireless Ad Hoc Networks

The field of wireless networking has received unprecedented attention from the research community during the last decade due to its great potential to create new horizons for communicating beyond the Internet. Wireless LANs (WLANs) based on the IEEE 802.11 standard have become prevalent in public as well as residential areas, and their importance as an enabling technology will continue to grow for future pervasive computing applications. However, as their scale and complexity continue to grow, reducing handoff latency is particularly important. This paper presents the Behavior-based Mobility Prediction scheme to eliminate the scanning overhead incurred in IEEE 802.11 networks. This is achieved by considering not only location information but also group, time-of-day, and duration characteristics of mobile users. This captures short-term and periodic behavior of mobile users to provide accurate next-cell predictions. Our simulation study of a campus network and a municipal wireless network shows that the proposed method improves the next-cell prediction accuracy by 23~43% compared to location-only based schemes and reduces the average handoff delay down to 24~25 ms.

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Behavior-based mobility prediction for seamless handoffs in mobile wireless networks

In a method for performing a multipoint video conference in a video conferencing system and a computer-readable record media storing a plurality of instructions for performing the method, the floor is given to participants of a conference so that the multipoint video conference can be progressed without a necessity of an MCU, and audio/video streams of the participants who actually utter in the conference can be selectively transmitted according to a capability of a transmission system. In the inventive method and recording medium, the method includes a first step of performing an initializing work so that a chairman of the conference can manage the conference based on a multipoint type; a second step of giving a given floor to a large number of participants who request the floor after the initializing work, through an active multipoint controller (MC); and a third step of selectively transmitting an audio and video stream of the participants who substantially utter in the conference according to the capability of an active transmission system in order to execute the given floor, thereby being utilized in a video conferencing system.

Method for performing multipoint video conference in video conferencing system

We describe a concept of Internet multimedia call center and discuss a collaborative multimedia middleware architecture supporting the call center. The collaborative multimedia middleware is composed of basic real-time service components for teleconferencing, screen sharing, collaborative browsing, and telepresentation so that a variety of application services can be built on it in an easy and interoperable manner. The multimedia call center as a typical application of such middleware enables Web users to communicate with any customer support agent in a Web-based shopping mall. In this paper we describe the details of the Internet multimedia call center scenario and models, and propose middleware architectures of which components composed of proprietary protocols for collaborative browsing, as well as conforms H.323 and T.120 ITU-T recommendations and SMIL W3C standard.

Seung-Min Park

Papers

Ranked cleaning policy and error recovery method for file systems using flash memory

CD-MAC: Cooperative Diversity MAC for Robust Communication in Wireless Ad Hoc Networks

Behavior-based mobility prediction for seamless handoffs in mobile wireless networks

Method for performing multipoint video conference in video conferencing system

Collaborative multimedia middleware architecture and advanced Internet call center