introduction: lymphoscintigraphy is imaging of the lymphatic system and has been integrated into the sentinel node mapping procedures. lymphoscintigraphy usually encompasses early or delayed static images. however, immediate dynamic imaging of the lymphatic basins and tumors has also been used as an adjunct lymphoscintigraphy imaging. the aim of this study was to assess the role of early dynami...

Introduction: Lymphoscintigraphy is imaging of the lymphatic system and has been integrated into the sentinel node mapping procedures. Lymphoscintigraphy usually encompasses early or delayed static images. However, immediate dynamic imaging of the lymphatic basins and tumors has also been used as an adjunct lymphoscintigraphy imaging. The aim of this study was ...

Hierarchical architectures are more and more widely adopted for organizing wireless sensor networks. In such architectures, middle-tier nodes take important roles, and preventing a malicious node from impersonating a middle-tier node and injecting falsified messages becomes critical. In this paper, we propose an energy efficient, distributed scheme to secure the multicast messages from the midd...

Clustering is a technique that can effectively reduce the energy consumption of sensor nodes. In self-organizing clustering strategies, sensors elect themselves to be cluster-heads independently. This cannot guarantee the even distribution of cluster-heads over the entire sensor-network field or even the election of an optimal percentage of cluster-heads. We proposed Two-Tier Clustering in [1] ...

The main purpose of this paper is studying both the regenerative decode-and-forward (DF) and nonregenerative amplify-and-forward (AF) schemes for mobile wireless relay network under channel uncertainty. A wireless system consisting of one-source-one-destination mobile pair and N multihop mobile relay nodes is under investigation. The scenario being studied is appropriate for low power or widely...

Wireless sensor networks (WSNs) have been identified as a promising technology for supporting assistive environments. This article introduces PROTECT, a system that employs autonomous software objects referred to as mobile agents (MAs) able of locating and informing visually impaired persons for potential risks. PROTECT utilizes a 3-tier architecture where the first tier comprises a base statio...

The article describes parallel implementations of two parametric identification algorithms. The first algorithm is based on the estimation of Bravais unit cell parameters, and the second one estimates Wigner-Seitz cell volumes. The developed parallel implementations are based on the two-tier model of concurrency. An external tier of concurrency uses Message Passing Interface (MPI) technique to ...

Most sensornetworkarchitectures typically assume thatnodes are stationary after deployment. However, a number of recent papers have shown that theuseofmobilenodesormobiledata collectors (MDC)can significantly improve the performance of a network. In thismodel, the network can be viewed as a three-tier architecture, where the lowest-tier consists of a set of sensor nodes. Themiddle-tier contains...

The history of the development Turkish defense industry is quite instructive. Even despite weak initial positions, a consistent policy strengthening and developing military- technical cooperation in combination with flexible marketing strategy makes it possible to achieve significant progress.

We focus on network design problems in those networks which have two distinct sets or tiers of network nodes: hosts and infrastructure nodes. For instance, wireless mesh networks are often composed of the infrastructure nodes which relay the data between the client nodes. Similarly, the switches (infrastructure) in data center networks sit between the servers (hosts) to route the information fl...