The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform

Eylem Ekici - One of the best experts on this subject based on the ideXlab platform.

  • mmspeed multipath multi speed protocol for qos guarantee of reliability and timeliness in wireless sensor networks
    IEEE Transactions on Mobile Computing, 2006
    Co-Authors: Emad Felemban, Changgun Lee, Eylem Ekici
    Abstract:

    In this paper, we present a novel packet Delivery Mechanism called Multi-Path and Multi-SPEED Routing Protocol (MMSPEED) for probabilistic QoS guarantee in wireless sensor networks. The QoS provisioning is performed in two quality domains, namely, timeliness and reliability. Multiple QoS levels are provided in the timeliness domain by guaranteeing multiple packet Delivery speed options. In the reliability domain, various reliability requirements are supported by probabilistic multipath forwarding. These Mechanisms for QoS provisioning are realized in a localized way without global network information by employing localized geographic packet forwarding augmented with dynamic compensation, which compensates for local decision inaccuracies as a packet travels towards its destination. This way, MMSPEED can guarantee end-to-end requirements in a localized way, which is desirable for scalability and adaptability to large scale dynamic sensor networks. Simulation results show that MMSPEED provides QoS differentiation in both reliability and timeliness domains and, as a result, significantly improves the effective capacity of a sensor network in terms of number of flows that meet both reliability and timeliness requirements up to 50 percent (12 flows versus 18 flows).

  • mmspeed multipath multi speed protocol for qos guarantee of reliability and timeliness in wireless sensor networks
    IEEE Transactions on Mobile Computing, 2006
    Co-Authors: Emad Felemban, Changgun Lee, Eylem Ekici
    Abstract:

    In this paper, we present a novel packet Delivery Mechanism called Multi-Path and Multi-SPEED Routing Protocol (MMSPEED) for probabilistic QoS guarantee in wireless sensor networks. The QoS provisioning is performed in two quality domains, namely, timeliness and reliability. Multiple QoS levels are provided in the timeliness domain by guaranteeing multiple packet Delivery speed options. In the reliability domain, various reliability requirements are supported by probabilistic multipath forwarding. These Mechanisms for QoS provisioning are realized in a localized way without global network information by employing localized geographic packet forwarding augmented with dynamic compensation, which compensates for local decision inaccuracies as a packet travels towards its destination. This way, MMSPEED can guarantee end-to-end requirements in a localized way, which is desirable for scalability and adaptability to large scale dynamic sensor networks. Simulation results show that MMSPEED provides QoS differentiation in both reliability and timeliness domains and, as a result, significantly improves the effective capacity of a sensor network in terms of number of flows that meet both reliability and timeliness requirements up to 50 percent (12 flows versus 18 flows).

  • probabilistic qos guarantee in reliability and timeliness domains in wireless sensor networks
    International Conference on Computer Communications, 2005
    Co-Authors: Emad Felemban, Eylem Ekici, R Boder, Serdar Vural
    Abstract:

    In this paper, we present a novel packet Delivery Mechanism called multi-path and multi-speed routing protocol (MMSPEED) for probabilistic QoS guarantee in wireless sensor networks. The QoS provisioning is performed in two quality domains, namely, timeliness and reliability. Multiple QoS levels are provided in the timeliness domain by guaranteeing multiple packet Delivery speed options. In the reliability domain, various reliability requirements are supported by probabilistic multipath forwarding. All these for QoS provisioning are realized in a localized way without global network information by employing localized geographic packet forwarding augmented with dynamic compensation, which compensates the local decision inaccuracy as a packet travels towards its destination. This way, MMSPEED can guarantee end-to-end requirements in a localized way, which is desirable for scalability and adaptability to large scale dynamic sensor networks. Simulation results show that MMSPEED provides QoS differentiation in both reliability and timeliness domains and, as a result, significantly improves the effective capacity of a sensor network in terms of number of flows that meet both reliability and timeliness requirements.

Emad Felemban - One of the best experts on this subject based on the ideXlab platform.

  • mmspeed multipath multi speed protocol for qos guarantee of reliability and timeliness in wireless sensor networks
    IEEE Transactions on Mobile Computing, 2006
    Co-Authors: Emad Felemban, Changgun Lee, Eylem Ekici
    Abstract:

    In this paper, we present a novel packet Delivery Mechanism called Multi-Path and Multi-SPEED Routing Protocol (MMSPEED) for probabilistic QoS guarantee in wireless sensor networks. The QoS provisioning is performed in two quality domains, namely, timeliness and reliability. Multiple QoS levels are provided in the timeliness domain by guaranteeing multiple packet Delivery speed options. In the reliability domain, various reliability requirements are supported by probabilistic multipath forwarding. These Mechanisms for QoS provisioning are realized in a localized way without global network information by employing localized geographic packet forwarding augmented with dynamic compensation, which compensates for local decision inaccuracies as a packet travels towards its destination. This way, MMSPEED can guarantee end-to-end requirements in a localized way, which is desirable for scalability and adaptability to large scale dynamic sensor networks. Simulation results show that MMSPEED provides QoS differentiation in both reliability and timeliness domains and, as a result, significantly improves the effective capacity of a sensor network in terms of number of flows that meet both reliability and timeliness requirements up to 50 percent (12 flows versus 18 flows).

  • mmspeed multipath multi speed protocol for qos guarantee of reliability and timeliness in wireless sensor networks
    IEEE Transactions on Mobile Computing, 2006
    Co-Authors: Emad Felemban, Changgun Lee, Eylem Ekici
    Abstract:

    In this paper, we present a novel packet Delivery Mechanism called Multi-Path and Multi-SPEED Routing Protocol (MMSPEED) for probabilistic QoS guarantee in wireless sensor networks. The QoS provisioning is performed in two quality domains, namely, timeliness and reliability. Multiple QoS levels are provided in the timeliness domain by guaranteeing multiple packet Delivery speed options. In the reliability domain, various reliability requirements are supported by probabilistic multipath forwarding. These Mechanisms for QoS provisioning are realized in a localized way without global network information by employing localized geographic packet forwarding augmented with dynamic compensation, which compensates for local decision inaccuracies as a packet travels towards its destination. This way, MMSPEED can guarantee end-to-end requirements in a localized way, which is desirable for scalability and adaptability to large scale dynamic sensor networks. Simulation results show that MMSPEED provides QoS differentiation in both reliability and timeliness domains and, as a result, significantly improves the effective capacity of a sensor network in terms of number of flows that meet both reliability and timeliness requirements up to 50 percent (12 flows versus 18 flows).

  • probabilistic qos guarantee in reliability and timeliness domains in wireless sensor networks
    International Conference on Computer Communications, 2005
    Co-Authors: Emad Felemban, Eylem Ekici, R Boder, Serdar Vural
    Abstract:

    In this paper, we present a novel packet Delivery Mechanism called multi-path and multi-speed routing protocol (MMSPEED) for probabilistic QoS guarantee in wireless sensor networks. The QoS provisioning is performed in two quality domains, namely, timeliness and reliability. Multiple QoS levels are provided in the timeliness domain by guaranteeing multiple packet Delivery speed options. In the reliability domain, various reliability requirements are supported by probabilistic multipath forwarding. All these for QoS provisioning are realized in a localized way without global network information by employing localized geographic packet forwarding augmented with dynamic compensation, which compensates the local decision inaccuracy as a packet travels towards its destination. This way, MMSPEED can guarantee end-to-end requirements in a localized way, which is desirable for scalability and adaptability to large scale dynamic sensor networks. Simulation results show that MMSPEED provides QoS differentiation in both reliability and timeliness domains and, as a result, significantly improves the effective capacity of a sensor network in terms of number of flows that meet both reliability and timeliness requirements.

Hyunjin Park - One of the best experts on this subject based on the ideXlab platform.

  • sonophoresis in transdermal drug Deliverys
    Ultrasonics, 2014
    Co-Authors: Donghee Park, Hyunjin Park
    Abstract:

    Abstract Transdermal drug Delivery (TDD) has several significant advantages compared to oral drug Delivery, including elimination of pain and sustained drug release. However, the use of TDD is limited by low skin permeability due to the stratum corneum (SC), the outermost layer of the skin. Sonophoresis is a technique that temporarily increases skin permeability such that various medications can be delivered noninvasively. For the past several decades, various studies of sonophoresis in TDD have been performed focusing on parameter optimization, Delivery Mechanism, transport pathway, or Delivery of several drug categories including hydrophilic and high molecular weight compounds. Based on these various studies, several possible Mechanisms of sonophoresis have been suggested. For example, cavitation is believed to be the predominant Mechanism responsible for drug Delivery in sonophoresis. This review presents details of various studies on sonophoresis including the latest trends, Delivery of various therapeutic drugs, sonophoresis pathways and Mechanisms, and outlook of future studies.

Zhiyong Chen - One of the best experts on this subject based on the ideXlab platform.

  • design and optimization of vod schemes with client caching in wireless multicast networks
    IEEE Transactions on Vehicular Technology, 2018
    Co-Authors: Hao Feng, Zhiyong Chen
    Abstract:

    Due to the explosive growth in multimedia traffic, the scalability of video-on-demand (VoD) services has become increasingly important. By exploiting the potential cache ability at the client side, the performance of VoD multicast Delivery can be improved through video segment precaching. In this paper, we address the performance limits of client-caching-enabled VoD schemes in wireless multicast networks with asynchronous requests. Both reactive and proactive systems are investigated. Specifically, for the reactive system where videos are transmitted on demand, we propose a joint cache allocation and multicast Delivery scheme to minimize the average bandwidth consumption under the zero-delay constraint. For the proactive system where videos are periodically broadcasted, a joint design of the cache-bandwidth allocation algorithm and the Delivery Mechanism is developed to minimize the average waiting time under the total bandwidth constraint. In addition to the full access pattern where clients view videos in their entirety, we further consider the access patterns with random endpoints, fixed-size intervals, and downloading demand, respectively. The impacts of different access patterns on the resource-allocation algorithm and the Delivery Mechanism are elaborated. Simulation results validate the accuracy of the analytical results and also provide useful insights in designing VoD networks with client caching.

Andrzej Przemyslaw Herman - One of the best experts on this subject based on the ideXlab platform.

  • essential oils and their constituents as skin penetration enhancer for transdermal drug Delivery a review
    Journal of Pharmacy and Pharmacology, 2015
    Co-Authors: Anna Herman, Andrzej Przemyslaw Herman
    Abstract:

    Objectives In this paper, we focused on essential oils and their constituents as skin penetration enhancers for transdermal drug Delivery, Mechanism of their action as well as their possible toxicity. Key findings Essential oils and their volatile constituents can penetrate through the skin as well as enhance penetration of different drug from topical formulation into the lower skin layers using different Mechanisms of action based on (1) disintegration of the highly ordered intercellular lipid structure between corneocytes in stratum corneum, (2) interaction with intercellular domain of protein, which induces their conformational modification, (3) increase the partitioning of a drug. After application to the skin, essential oils and their components are rapidly metabolized, not accumulated in the organism and fast excreted what strongly suggest that they can be successfully use as safe penetration enhancers. Summary Essential oils and their constituents may be preferred over the traditionally used synthetics materials as safe and suitable permeation enhancers to promote the percutaneous absorption of hydrophilic and lipophilic drugs from topical formulation into the lower skin layers.

  • essential oils and their constituents as skin penetration enhancer for transdermal drug Delivery a review
    Journal of Pharmacy and Pharmacology, 2015
    Co-Authors: Anna Herman, Andrzej Przemyslaw Herman
    Abstract:

    Objectives In this paper, we focused on essential oils and their constituents as skin penetration enhancers for transdermal drug Delivery, Mechanism of their action as well as their possible toxicity. Key findings Essential oils and their volatile constituents can penetrate through the skin as well as enhance penetration of different drug from topical formulation into the lower skin layers using different Mechanisms of action based on (1) disintegration of the highly ordered intercellular lipid structure between corneocytes in stratum corneum, (2) interaction with intercellular domain of protein, which induces their conformational modification, (3) increase the partitioning of a drug. After application to the skin, essential oils and their components are rapidly metabolized, not accumulated in the organism and fast excreted what strongly suggest that they can be successfully use as safe penetration enhancers. Summary Essential oils and their constituents may be preferred over the traditionally used synthetics materials as safe and suitable permeation enhancers to promote the percutaneous absorption of hydrophilic and lipophilic drugs from topical formulation into the lower skin layers.