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.
Scaling web applications such as e-commerce in cloud by adding or removing servers in the system is an important practice to handle workload variations, with the goal of achieving both high quality of service (QoS) and high resource efficiency. Through extensive scaling experiments of an n-tier application benchmark (RUBBoS), we have observed that scaling only hardware resources without appropriate...
For mobile devices, battery energy is the most precious resource. In the last decade, researchers have proposed various energy saving strategies from the system level to the hardware component level. In this paper, we explore how close to one week a smart phone running off of a single battery can last under normal usage. We first developed a battery lifetime prediction model that considers the influence...
We present a new device driver generation approach capable of automatically generating a large portion of device drivers code, and this for different operating systems (OSes). This approach is based on a model-driven methodology, where a tiny language is utilized to model the device features and abstract low-level complexities of a driver. The approach can handle different driver architectures. We...
Markerless technology is a game changer for motion-capture applications, such as the monitoring of patients outside the hospital, realistic face-to-face communication across continents, and observation across large spaces.
The paper reveals a trend of substituting PC with thin clients. Features and application demand of thin clients are investigated. A comprehensive evaluation system is established, which takes factors including hardware, remote concentrated management system, peripheral compatibility, performance, reliability, virtualization platform compatibility and energy consumption into account. Furthermore, we...
Battery lifetime, which is one of the most significant user experiences for mobile devices, strongly restricts the functional design of hardware architecture and applications. Among all the aspects of energy saving for mobile devices, energy-aware application design is one of the main areas that has not yet been explored comprehensively. In this paper, we argue for the case for energy-aware mobile...
OpenFlow is a new type of switch model in rapid development. This model supports the control of external policies to network process. Multi-table and multi-item group matching is the challenge in Openflow platform. Three-layer implementation model of Openflow switch is proposed in this paper. Openflow multi-table switching technique based on TCAM is studied, Iincluding the model of the multi-table...
For the stream-like applications with high-bandwidth and low latency, optimizing the memory latency can effectively improve the QoS. In this paper, we propose a dedicated adaptive loop pre-fetch mechanism to reduce the memory latency and also improve the pre-fetch accuracy. In the mechanism, when a loop sequences is detected, the stream pre-fetch engine can adaptively initiate the pre-fetch operation...
This paper introduces the principle of controller area network (CAN) bus and the structure of fuel cell vehicle control system based on CAN bus. It focuses on electrical air -condition control system for fuel cell vehicle based on CAN bus, which consists of an air condition control node and an air condition compressor drive. The design of electrical air condition control system based on CAN bus is...
With the growing needs for advanced functionalities in modern embedded systems, it is now necessary to integrate multiple processors in the system, preferably on a single chip, to support the required computing complexity. The problem is that such multiprocessor system-on-chip (MPSoC) architecture is very complex and its internal behavior is very difficult to track. An effective tool for profiling...
In contrast to current systems where the spectrum allocation is static, future cognitive radio devices will be able to seek and use in a dynamic way the frequencies for network access; this will be done by autonomous detection of vacant bands in the radio spectrum. Many of the cognitive systems use highly complex algorithms for enabling dynamic spectrum access. With a variety of hardware systems available...
Based on the demand analysis of network operation of rail transit AFC system, a new kind of contactless IC card reader middleware is designed in order to make different non-contact IC card reader equipment compatible with each other, unify the fare calculation and achieve uniform ticket process. The contactless IC card reader middleware includes initialization module, security access module, ticket-card...
Wireless sensor networks (WSN) applications have become a growing interest in recent years. Localization is an important issue in WSN because sensor nodes are randomly scattered over a region. They get connected into network by themselves. A reliable and low cost localization method will provide great advantage for the application of WSN in large area with sparse nodes. In this paper, a distributed...
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.