The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Modern collaborative virtual environments (CVEs) require sophisticated data exchange mechanisms to provide consistent and at the same time responsive interaction of a large number of users. While many of these mechanisms have been well studied, usually they represent isolated solutions requiring knowledge of low-level networking programming for implementation. In this regard, there is still a lack...
Information-centric networking is a communication paradigm where there is no focus on endpoint addressing; rather, it is an attempt to achieve efficient information dissemination by focusing on the content that is distributed. In this article we describe how information-centric networking can be leveraged in order to extend NATO core enterprise services (CES) into the tactical domain. The paradigm...
Although the need for the exactly-once request-response interaction pattern is ubiquitous in distributed systems, making it work in practice is anything but simple. Ensuring the at-most-once part of the invocation is relatively easy. Unfortunately, the same is not true for the at-least-once guarantee, which depends on the recovery from crashes of the client, the server and the network. This is what...
Desktop Grids have been used intensively to deploy applications at low cost. Applications types are classified into high throughput computing and high throughput data management. Desktop Grids such as Condor, BOINC, XtremWeb and Our Grid provide a wide range of high throughput computing systems. on the other hand, several data management systems such as Bit dew, GatorShare, Stork, Grid FTP, have been...
A hospital's mobile nursing cart can collect clinical data via Wi-Fi networks and save data in the server side. This service not only provides better medical care, but also enhances staff productivity. However, the coverage of Wi-Fi is limited and signal dead ends will result in wireless disconnection. This problem can be solved by switching between Wi-Fi and 3G. The physical connection must be disconnected...
Various services, such as streaming, network games and thin clients, which keep a session state of user equipments (UEs) for a long period, are provided from servers. This paper proposes a session state migration which relocates session states from one server to multiple servers where the service of the relocated session state succeeds to be processed. Distributing the session states into the multiple...
The Middleware is a piece of software lying between the operating system and the application layer. Distributed applications are gaining popularity with the widespread of reliable communication services. It is affordable to have data accessible 24/7 from almost anywhere, thanks to the well-developed mobile technology and handheld devices. Healthcare domain is one of the very demanding application...
Before a wider adoption of the Internet of Things (IoT) vision occurs, many urgent technological and social challenging issues still need to be addressed, including device interoperability, systems autonomy, privacy and security concerns, which could have a significant impact on several aspects of everyday-life or potential end-user. Due to the very large number of technologies normally in place within...
Sensor and Actuator Networks (SAN) are distributed systems deployed to sense, monitor and act on the environment. They may include any of the following: sensors, wiring, embedded system components, wireless communication and backbone servers. Given current technological advances, costs and flexibility advantages of wireless sensor networks technology, wireless SAN (WSAN) deployments are being considered...
The identification process in network environments consists of knowing who is using a resource in order to aggregate security, integrity and control to it. However, the diversification of resources in such environments implies a set of credentials for the same user as well as the requirement of authentication as many times as the resources have to be accessed. In this context, Squid is an interesting...
Providing high-speed data transfer is vital to various data-intensive applications in cloud computing systems. We design a middleware layer of high-speed communication based on Remote Direct Memory Access (RDMA) that serves as the common substrate to accelerate various data transfer applications in cloud computing, such as FTP, HTTP, file copy, sync and remote file I/O. This middleware offers higher...
Multimodality inputs are becoming increasingly popular in supporting pervasive applications, due to the demand for highly responsive and intuitive human control interfaces beyond the traditional keyboard and mouse. However, the heterogeneous nature of novel multimodal input devices and the tight coupling between input devices and applications complicate their deployment, rendering their dynamic integration...
The Internet of Things vision states that sensors and actuators shall be integrated into the global Internet to facilitate an interaction with and integration of the physical environment. The development of enabling technologies like uIPv6 and 6LoWPAN provide the basic requirements for this interconnection. However, a seamless Internet-connection and interconnection between sensors and actuators can...
The hardware and software advances of Graphics Processing Units (GPUs) have favored the development of GPGPU (General-Purpose Computation on GPUs) and its adoption in many scientific, engineering, and industrial areas. Thus, GPUs are increasingly being introduced in high-performance computing systems as well as in datacenters. On the other hand, virtualization technologies are also receiving rising...
Minix is an open-source multiserver operating system designed to be highly reliable, flexible, and secure. The kernel is small and is the only piece of software that runs in privileged-mode, on the other hand user processes, specialized servers and device drivers run as isolated processes in user-mode. System Calls use Interprocess Communications primitives to send messages requesting services from...
We present a viable communication infrastructure and protocols to support the versatile data exchange in a network of smart cameras. Each node in network is an embedded smart camera whose hardware/software architecture was carefully designed to meet the performance requirement while providing sufficient flexibility. We introduce a novel scalable clustering approach, which uses asynchronous event exchange...
The Java Remote Method Invocation (RMI) simplifies the development of distributed applications. However, the specification relies on the client/server communication paradigm, creating a single point of failure at the server side. To address this issue, some approaches extend RMI syntax and semantic to encompass fault tolerance. However, this solution is neither transparent for the application programmer...
To simplify computer management, various administration systems based on wired connections adopt advanced techniques to manage software configuration. Nevertheless, the strong relation between hardware and software makes for an individualism of that management, besides penalizing computational mobility and ubiquity. All these issues lead to degradation of scalability, flexibility and the facility...
Because of the special nature of communications systems, designing and developing a simple and targeted multimedia communications platform is the focus of this work. The main features of the platform are applying the existing messaging middleware technology to the system in order to meet the messaging needs communication system, extending the message middleware, adding configurable signaling and encryption...
Distributed Energy Resources (DERs) are rapidly penetrating in power systems including their accompanying software and hardware (SW/HW) systems that are also distributed and related to different manufacturers and owners. Information integration and interoperability are two problems in distributed systems. This paper presents a comparison between the available integration middleware and standards for...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.