Rectangular waveguide is one of the earliest types of transmission lines. Rectangular waveguide can be produced by hot extrusion process. In this paper, the hot extrusion process of CuZn5 rectangular waveguide was investigated by Finite Element Method (FEM). In addition, Genetic Algorithm (GA) was used to optimize the die geometry and process conditions to achieve the lowest magnitude of extrus...

In any metal forming process, both the strain rate and deformation rate depend on the die profile. The die profile also, is responsible for the non-uniformity of the deformation along the cross-section. These affect the quality and mechanical properties of the product. Therefore, if a die is designed, in which the affecting variables can be controlled spontaneously it is hoped to obtain a produ...

Introduction: The aim of the present study was to determine direct effects of NO modulation on protective electrophysiological properties of atrioventricular node (AV node) in the experimental model of AF in rabbit. Methods: Isolated perfused rabbit AV nodal preparations were used in two groups. In the first group (N=7), LNAME (50μM) was applied. In the second group (N=12), different concent...

Liebe RE-Interessierte, das Fachgruppentreffen 2007 hat wieder sehr erfreuliches Interesse verzeichnet: Am 29/30.11.2007 trafen sich über knapp 40 TeilnehmerInnen in den Räumen der Fraunhofer FIRST. Die Organisation, die von Dr. Ramin Tavakoli von der TU Berlin übernommen wurde, war hervorragend. Das gemeinsame Abendessen in den „12 Aposteln“ wurde rege zum fachlichen und nicht-fachlichen Austa...

Digitale Displays haben sich als dynamisches und interaktives Medium in der Außenwerbung etabliert. Einige klassische Werbeträger wie die Litfaßsäule haben sich jedoch aufgrund der komplexen technischen Anforderungen bisher noch nicht als digitales Displayformat durchgesetzt. Dabei stellen die digitalen Entsprechungen eigene Formate dar, mit neuartigen Möglichkeiten der Darstellung und Interakt...

results there were 39 cases with lymph node metastasis in 59 malignant tumors, and 0 cases in 6 benign follicular type tumors. the staining scores by jt-95 of the 39 tumors with lymph node metastasis were 5+ in eight cases and 6+ in 31 cases. on the other hand, the scores of 20 malignant tumors without lymph node metastasis were < 4+ in all of the cases. in the co-cultured assay, numerous adhes...

Aiming at the problem of limited energy of sensors in Wireless Sensor Network, based on the classic clustering routing algorithm LEACH, a distance-energy cluster structure algorithm considering both the distance and residual energy of nodes is presented, which improves the process of cluster head election and the process of data transmission. This protocol can successfully prolong the network’s...

Wireless Sensor Networks (WSNs) present a new generation of real-time embedded systems for a wide variety of applications. However WSNs have limited computation, energy, and memory resources. One of the approaches to minimize the energy consumption is to allow only some nodes in a cluster of sensor nodes, called clusterheads, to communicate with the base station. Appropriate cluster-head electi...

In dieser Arbeit werden Digit-On-Line-Module für eine schnelle serielle Signalverarbeitung vorgestellt, die nach dem Most-Significant-Digit-FirstPrinzip arbeiten. Diese gestattet im Gegensatz zu der bekannten Least-Significant-Digit-First-Technik, die nur für die Addition, Subtraktion und Multiplikation ohne Einschränkungen zu verwenden ist, die Implementierung nahezu aller praktisch vorkommend...

Due to the limited resources acquired by sensor, energy consumption is one of main issues that have drawn attention researchers in field wireless sensor networks (WSN). In this paper, we propose a new protocol based on duty cycle method and threshold. The suggested aims balance traffic among all nodes. As result, entire network will be balanced prevent service interruptions portion network. Fur...