This paper designs a smart grid energy-saving control system for real-time video streaming, named Eco-VisionGrid. According to the real-time video stream collected by the camera, through the location analysis model and intelligent lighting control model deployed on the edge device, it analyzes the location information of the person and forms the best lighting decision. Preliminary experimental results show that Eco-VisionGrid can effectively implement power regulation and management.

With the progressive augmentation of the density of 3-D processor arrays, some processor elements (PEs) often fail due to overload or overheating during massively parallel computing operations. Therefore, it is necessary to take effective fault-tolerant technology to ensure the reliability of the system. This article investigates an efficient reconfiguration method to construct 3-D fault-free logical subarray with more fault-free PEs and less interconnection length (interlength). First, we propose a novel method based on the barrel effect to find the bottleneck plane of 3-D processor arrays. Second, an efficient compensation strategy is proposed to replace faulty PEs on adjacent physical planes with fault-free PEs on the bottleneck planes, which leads to more fault-free PEs that can be used to construct the subarray. Then, we propose a heuristic to construct the subarray and optimize iteration redundancy to accelerate reconstruction. Finally, a heuristic optimization algorithm is proposed to reduce the interlength between PEs, which can reduce the dynamic power consumption and communication costs. In addition, we propose a more accurate method to calculate the lower bound of the interlength to better evaluate the performance of the algorithm. Simulation experiments show that, compared to the state-of-the-arts, on$128\times 128\times 128$host array, the utilization rate of fault-free PEs can be improved up to 15.6% and the interlength redundancy can be reduced by 78.2% for random faults. On$64\times 64\times 64$host array, the average improvement of the two indicators under clustered faults can reach 93.2% and 69.3%. Moreover, for all cases considered, the proposed new lower bound and reconstruction time can be reduced by an average of 18.47% and 76.13%, respectively.

With the ever-increasing integration and parallel computing capabilities of 3D processor arrays, the occurrence of processor elements (PEs) failures caused by various factors has become more prevalent. Therefore, the implementation of a fault-tolerant mechanism that uses the remaining fault-free PEs to reconfigure sub-array becomes critical. In this paper, we study the problem of reconfiguring a 3D subarray with as many fault-free PEs as possible, which has been shown to be NP-complete in previous work. Although prior algorithms have been effective under low fault densities, they are severely limited when faced with high fault densities. To address this, we first define the bottleneck of the 3D processor array, proposed a novel method to identify the physical bottleneck plane that restricts the reconfigurable size of the logical sub-array and prove its correctness. Then, we propose an effective compensation strategy that can fully utilize the fault-free PEs in the bottleneck plane. Under this strategy, a sliding-window weight calculation method is proposed to determine the priority of compensation. Finally, we proposed a heuristic algorithm, which can construct the maximum target array from different dimensions in polynomial time. Experimental results demonstrate that the proposed algorithm exhibits favorable performance in terms of harvest and degradation. For the random-failure model, the improvement in the harvest for fault-free PEs is up to 32.03% on a$32 \times 32 \times 32$host array with a 20% fault density. And for the clustered fault model, the improvement in harvest is up to 70.63% on a$32 \times 32 \times 32$host array distributed with 12 cluster failures of size$6 \times 6 \times 6$.

Sensors in wireless sensor network (WSN) are usually deployed in the wild or even hostile circumstance. What is worse, most of the sensors have limited communication bandwidth, computation resources and energy. Therefore, it is challenging to ensure the security of WSN without decreasing its network performance. Network coding (NC) is a promising way for improving communication capability in WSN, e.g., high throughput, robustness and low-energy. Nevertheless, network coding is vulnerable to malicious attacks. Presently, many secure detections, such as information theoretic-based or cryptographic-based techniques, have been proposed to deal with a single type of attack, but are incapable of resisting the joint attacks, e.g., the union of pollution attacks and replay attacks. In this paper, a secure detection service is presented. It is deployed on every node of WSN to monitor, manage and control the messages passing through them in real-time. In the service, a lightweight timestamp-based message authentication code, namely TMAC, is designed with Exclusive OR network coding. Based on TMAC and time synchronization technique, a joint detection is implemented to resist pollution attacks and replay attacks synchronously. The correctness of the detection service is proved. Finally, the performance evaluation shows that the detection scheme brings negligible extra-expense in communication bandwidth and computational complexity compared to MAC-based schemes, and consumes energy lowly compared to other joint detection schemes.

We present Reflector, to support both high-level and low-level I/O monitoring through user-defined interfaces such as HDF5 and NetCDF in addition to POSIX- and MPI-IO. We evaluate Reflector on both an on-premises 500-core HPC cluster and a leadership-class supercomputer at the Lawrence Berkeley National Laboratory. Preliminary results are promising as the system prototype incurs negligible performance overhead and clearly illustrates the I/O patterns and bottlenecks of multiple applications.

In this paper, we investigated the technique for improving the reliability of 3-D processor with faults by reconfiguring a 3-D fault-free subarray utilizing as many nonfaulty process elements (PEs) as possible. A novel flexible rerouting scheme is proposed, which makes the PEs can be rerouted or bypassed in three dimensions, hence increasing the number of neighbors of each element to construct a logical array. Under this scheme, an efficient heuristic algorithm is presented to construct a logical array. The experimental results show that the proposed algorithm under flexible rerouting scheme can produce logical arrays with higher harvest from the host arrays with faults for the random fault scenarios, the improvement is by up to 46.47% compared to the state-of-the-arts.

Network coding has become a promising approach to improve the communication capability for WSN, which is vulnerable to malicious attacks. There are some solutions, including cryptographic and information-theory schemes, just can thwart data pollution attacks but are not able to detect replay attacks. In the paper, we present a lightweight timestamp-based message authentication code method, called as TMAC. Based on TMAC and the time synchronization technique, the proposed detection scheme can not only resist pollution attacks but also defend replay attacks simultaneously. Finally

Internet of Things (IoT) can provide new value-added service by connecting the physical devices to virtual environments association with their context, and there is also a huge demand in ad hoc services by the end users for IoT applications. By extending mashup concept into IoT applications, we can achieve a novel and more lightweight services creation approach. This paper proposes a lightweight IoT service mashup middleware based on REST-style architecture for IoT applications, and design an uniform sensor devices access and dynamically protocol stack management framework, propose a distributed publish/subscribe based messages distribution service, and situational IoT services mashup approach, which can be integrated easily to create new composite and situational applications, and also apply the REST principles to define an extensible interface to build comprehensive and situational mashup applications. Based on proposed service mashup middleware, the end user can integrate applications and services in a more lightweight manner. We also illustrated the scenarios for RESTful Web service mashups representing for coal mine safety monitoring and control automation. In the experiments, the end-user evaluation has been conducted to evaluate the middleware, and also the performance has been measured and analyzed.

Customizable mobile services are usually expressed with complex services composed of different atomic services. Fine-grained atomic mobile services are not so convenient for end users to reuse. Considering that in identical or similar service domains, a great deal of the business logics and functions are reusable within the scope. So we present a template-based framework to allow reuse of services and to achieve rapid mobile application development. The reusable fine-grained service logics and functions are encapsulated into comparatively coarse-grained templates, from which the designers can create the personalized composite services and edit the templates efficiently.

Internet of Things(IoT) was first coined in 1999 by Kevin Ashton. However with the technologies advancement, it seems that intelligent devices will invisibly be embedded in our life in few years. Enormous amounts of data need be exchanged every seconds. It calls for a seamless effect and easily interpretable communicating architecture. The research proposal will try to address some challenges and possible path in IoT enabled smarthome. It focuses primarily on two categories. Firstly, devices in IoT field is always distributed. So, there is a distributed IoT services architecture instead of traditional control-center solution. However, those devices are also limited in a certain area (such as a home local network). In order to reduce delay and burden, those distributed devices collect context information though a self-organizing broadcast network, and determine their next action based on that context data. Secondly, using Docker (a lightweight hardware-agnostic and platform-agnostic container) to package services. In our smarthome network, IoT services are distributed across different home electronics. Docker shields all the differences, so that we can quickly deploy and update module in the smarthome network after purchasing new electronics.

The Internet of Things (IoT) infrastructure with numerous diverse physical devices are growing up rapidly, which need a dynamic services coordination approach that can integrate those heterogeneous physical devices into the context-aware IoT infrastructure. This paper proposes a situation-aware dynamic IoT services coordination approach. First, focusing on the definition of formal situation event pattern with event selection and consumption strategy, an automaton-based situational event detection algorithm is proposed. Second, the enhanced event-condition-action is used to coordinate the IoT services effectively, and also the collaboration process decomposing algorithm and the rule mismatch detection algorithms are proposed. Third, the typical scenarios of IoT services coordination for smart surgery process are also illustrated and the measurement and analysis of the platform's performance are reported. Finally, the conclusions and future works are given.

In this paper, we show an end-user oriented tool suite for mobile application development. The advantages of this tool suite are that the graphical user interface (GUI), as well as the application logic can both be developed in a rapid and simple way, and web-based services on the Internet can be integrated into our platform by end-users. This tool suite involves three sub-systems, namely ServiceAccess, EasyApp and LSCE. ServiceAccess takes charge of the registration and management of heterogeneous services, and can export different form of services according to the requirements of the other sub-systems. EasyApp is responsible for developing GUI in the form of mobile app. LSCE takes charge of creating the application logic that can be invoked by mobile app directly. Finally, a development case is presented to illustrate the development process using this tool suite. The URL of demo video: https://youtu.be/mM2WkU1_k-w

*** The rapid development of mobile internet abstracts many non-professional persons to creating mobile applications. Traditional development process cannot meet their needs. In this paper, we present a cross-platform mobile development environment based on OSGi framework, EasyApp. It provides a highly-integrated, UI-friendly and easily-operating environment. Applications are comprehensively developed with web techniques. Users could create mobile applications with draggable widgets. Native APIs of mobile phone can be invoked with abundant plugins. After designing, users could package and download applications of multiple platforms. ***