BACKGROUND Hemodynamic optimization of cardiac resynchronization therapy (CRT) can be achieved reproducibly and--with bulky, nonimplantable equipment--noninvasively. We explored whether a simple photoplethysmogram signal might be used instead. METHOD Twenty patients (age 65 ± 12) with CRT underwent automatic atrioventricular (AV) delay optimization, using a multiple-transitions protocol, at t...

A Wireless sensor network of globally distributed autonomous sensors to monitor physical or environmental conditions such as temperature, noise, pressure etc. and to cooperatively pass their data through the network to a main location. CASER protocol is used to increase the lifetime of the network. Energy consumption and security are the two conflicting issues in WSN. To overcome this problem s...

Improving the energy efficiency of residential buildings can lead in reducing the energy consumption of cities. It is presented a prototype house that uses real time connectivity to enable effective energy management through the deployment of an optimization algorithm. Following the principles of the Web of Things, the devices of the house are mapped into a RESTful structure where the HTTP prot...

For the energy and computing capability of nodes are limited in Wireless sensor networks (WSNs). In order to decrease the dead speed of the nodes, proposes an uneven clustering routing protocol for wireless sensor networks based on Fruit Fly Optimization Algorithm (FOA-UCR). By using Fruit Fly Optimization Algorithm to select a set of optimal nodes as cluster heads and selects secondary nodes f...

In this paper, we propose a new concurrency control algorithm based on multi-agent systems which is an extension of majority protocol. Then, we suggest a clustering approach to get better results in reliability, decreasing message passing and algorithm’s runtime. Here, we consider n different transactions working on non-conflict data items. Considering execution efficiency of some different...

INTRODUCTION Several studies have shown that goal-directed hemodynamic and fluid optimization may result in improved outcome. However, the methods used were either invasive or had other limitations. The aim of this study was to perform intraoperative goal-directed therapy with a minimally invasive, easy to use device (FloTrac/Vigileo), and to evaluate possible improvements in patient outcome de...

In this paper we present on-demand routing algorithm Enhanced Ant Colony Optimization (ACO) for Mobile ad-hoc networks(MANETs). Ant Colony Optimization, a swarm intelligence based optimization technique, is widely used in network routing. These approaches try to map the solution capability of swarms to mathematical and engineering problems. The introduced routing protocol is highly adaptive, ef...

Due to the limited energy for sensor nodes in wireless sensor network (WSN), the clustering for nodes becomes an effective scheme to save energy, but it is premature to appear the phenomenon of blind nodes because of ignoring the state information for neighbor nodes in determining cluster-head, accordingly leads to waste energy. So a novel clustering protocol based on evolutionary computation i...

The optimization of network protocol parameters based on network simulation can be considered a “black-box” optimization problem with unknown, multi-modal and noisy objective functions. In this paper, an adaptive random search algorithm is proposed to perform efficient and robust optimization for the concerned problems. Specifically, the algorithm is designed for use by the on-line simulation s...