Editorial (1-2)
        Tran Khanh Dang
A Path-Consistency based Algorithm for Anomaly Detection of Spatial Constraints in GeoXACML Policies (3-15)
        Tuan Anh Dang and Tran Khanh Dang
Anomaly detection in GeoXACML policies supports policy designers in the policy definition process to save effort, minimize errors, improve performance. Currently, there is a lot of research focusing on anomaly detection in XACML from which GeoXACML is extended. However, no research directly solves anomaly detection problem in GeoXACML, especially in the spatial aspect. In this paper, we propose an algorithm based on the path-consistency algorithm to detect anomalies in spatial constraints of GeoXACML policies. In our approach, when a policy designer adds a new rule or updates an existing rule, an engine will automatically check if this rule is potentially conflicting or redundant to others. We also present a simple example in step-by-step to clarify how this algorithm works. Finally, to analyze the performance of this algorithm, we will consider its computational complexity.

Fault Resolution System for Inter-Cloud Environment(16-29)
        Ha Manh Tran, Synh Viet Uyen Ha, Huynh Tu Dang, and Khoa Van Huynh
Fault resolution in communication networks and distributed systems is a complicated process that demands the involvement of system administrators and supporting systems in monitoring, diagnosing, resolving and recording faults. This process becomes more challenging in inter-cloud environment where multiple cloud systems coordinate in provisioning applications and services. In this context, we propose a fault resolution system that assists system administrators in resolving faults in inter-cloud environment. The proposed system is characterized by the capability of sharing and searching fault knowledge resources among cloud systems for fault resolution. It uses a peer-to-peer network of fault managers that provide facilities to monitor faults occurring in cloud systems and search similar faults with solutions occurring in other cloud systems. We have implemented several components of the proposed system including fault monitor, fault searcher and fault updater. We have also experimented and evaluated the prototyping system on fault databases obtained from several fault sources, such as bug tracking systems, online discussion forums and vendor knowledge bases.

MDRAN: Multihop Disaster Recovery Access Network (30-42)
        Quang Tran-Minh, Kien Ngyen, Eiji Kamioka, and Shigeki Yamada
This paper proposed a novel approach to resilient wireless multihop disaster recovery access networks (MDRAN). Both virtual access point (VAP) and wireless virtualization (WV) techniques have been combined in an appropriate way thereby the networks can be automatically setup on-demand using on-site commodity mobile devices (laptops, tablet PCs, smart phones). In the proposed approach, difficulties remained from conventional access network technologies such as the requirements of installing special hardware (e.g. multiple network interface cards - NICs, particular mesh routers, etc.,) and software (e.g. network auto-configuration software including routing protocols) on each mobile node (MN) in advance have been resolved. As a result, users can connect to the proposed MDRAN as easily as connecting to conventional APs. After connecting to the proposed network, users naturally and unconsciously contribute to the network extension. This feature improves the self-supporting capability at the disaster's local communities. Experimental evaluations reveal the feasibility, effectiveness as well as the scalability of the proposed approach. As a result, the proposed scheme is ready to be realized in the actual disaster recovery applications.

Overlay upper Clothing Textures to Still Images based on Human Pose Estimation (43-57)
        Quang-Song Le and Minh-Triet Tran
This paper proposed a novel approach to resilient wireless multihop disaster recovery access networks (MDRAN). Both virtual access point (VAP) and wireless virtualization (WV) techniques have been combined in an appropriate way thereby the networks can be automatically setup on-demand using on-site commodity mobile devices (laptops, tablet PCs, smart phones). In the proposed approach, difficulties remained from conventional access network technologies such as the requirements of installing special hardware (e.g. multiple network interface cards - NICs, particular mesh routers, etc.,) and software (e.g. network auto-configuration software including routing protocols) on each mobile node (MN) in advance have been resolved. As a result, users can connect to the proposed MDRAN as easily as connecting to conventional APs. After connecting to the proposed network, users naturally and unconsciously contribute to the network extension. This feature improves the self-supporting capability at the disaster's local communities. Experimental evaluations reveal the feasibility, effectiveness as well as the scalability of the proposed approach. As a result, the proposed scheme is ready to be realized in the actual disaster recovery applications.

Improving Delay Performance for Time-Critical Communications in VANET (94-106)
        Dong Lai Sun, Hafssa Benaboud, Jianhua Li, and Noufissa Mikou
To ensure the functionality of intelligent transportation, time-critical information is of great importance in Vehicular Ad-hoc Network (VANET). Meanwhile, non-time-critical information still exists in the network, with which regular services can be provided. A key problem in VANET is to guarantee delay performance for time-critical traffic while still satisfying demand of non-time-critical traffic. To achieve this object, a multiple threshold policy derived from TEOS (Threshold Enabled Opportunistic Scheduling) is studied in this paper. With this policy, overall channel efficiency is optimized while a throughput requirement from the non-time-critical traffic is still considered. Thus, two objects can be achieved simultaneously: time-critical packets can have a better channel access probability as a result of a more free channel; and non-time-critical traffic can be transmitted as required. Numerical results and simulations show that this approach can provide smaller delay for time-critical transmissions in VANET.

Geo-Social Mobility Model for VANET Simulation (107-127)
        Nardine Basta, Amal El-Nahas, Hans-Peter Grossmann, and Slim Abdennadher
Vehicular Ad Hoc Network (VANET) is a special case of opportunistic network where nodes are moving vehicles communicating together through short range wireless transmission. VANET applications vary from safety and accident avoidance to leisure and entertainment. The data dissemination routine differs according to the delay tolerance of the application. The bandwidth usage of the application is directly proportional to the priority of the sent traffic and accordingly the routing protocols vary. Simulation is a key feature in validating the protocols dedicated for VANET applications. Since the vehicles mobility is driven by the human mobility characteristics and is controlled by the geographical restrictions of the roads, the work presented in this paper is aimed to having a realistic mobility model that incorporates both the social aspects of human mobility together with the geographical restrictions that governs the movement of the mobile nodes. This mobility model is for testing the protocols related to the delay tolerant applications where unicasting/multicasting is used for data dissemination rather than broadcasting. Thus location awareness and destination prediction is essential. The model is based on using realistic data sets rather than randomly generated data.

Design of Disaster State Presentation System Using Ultra High Resolution Display(160-178)
        Akira Sakuraba, Tomoyuki Ishida, Yasou Ebara, and Yoshitaka Shibata
Management of disaster information is identified as one of the important functions in disaster countermeasure activity once large scale disaster has broken out. Since a large number of disaster information regarding with damage state in aftermath phase are reported to Counter Disaster headquarter (CDH), officers of CDH have to consolidate those to understand the state and to do decision making for quick and correct activity. In conventional, printed large maps are used for disaster management. However, the printed maps are disadvantage because a rapid and flexible reflection of disaster association between the damage state and geographical location cannot be easily attained. On the other hand, a GIS based disaster information system which represents disaster information on a standard display device is proposed and used for small number of disaster officers with relatively small scale of disasters. In this paper we propose LIVEwall by tiled displayed System based presentation and sharing platform for a large disaster case. Our system provides aggregated functions which can visually overlay the damage information on digital map for decision making in the disaster case. The damage state is managed and consolidated and displayed on the digital map on each CDH in local governments. In addition, we propose a shared workspace on the unified shared display device to show both the detail of indicated object and the perspicuity of whole wide area. We consider various interactions between users and tiled display system for both within the same CDH and inter-CDHs as design concept.