Im Forschungsprojekt iGreen werden Techniken und Strukturen entwickelt, um einen offenen Wissensaustausch in der Landwirtschaft zu ermöglichen, bei denen öffentliche und private Daten nutzbringend verknüpft werden können. Dabei greifen zahlreiche Komponenten in komplexen Szenarien ineinander. Semantische Technologien erleichtern den Datenaustausch und erlauben eine enge Verzahnung der einzelnen...

Drawing of square section rod from round bar can be done with two die shapes. In the first die shape, deformation starts from corners of the square and in second die shape, deformation starts from sides of square. This article has compared the drawing force for both die shapes and as a result optimum die shape was determined. Due to complexity of metal flow inside the die, analyzing of actual p...

Enhancing lifetime of sensor nodes should be considered as the key design objective in Wireless Sensor Networks (WSN). A sensor node can only be equipped with a limited energy supply and it loses its energy during data communication. In some application scenarios, replenishment of energy resources might be impossible since the sensor nodes are distributed in remote environment. Hence, the nodes...

Ontologien und Taxonomien sind kontrollierte, strukturierte Vokabulare für eine Domäne um Objekte darin zu beschreiben. Ontologien in der Biologie, wie beispielsweise die NCBI Taxonomie, die Klassifizierung von Lebewesen, oder die Gene Ontology sind als Bäume bzw. gerichtete, azyklische Graphen aufgebaut. Taxonomien werden häufig zusammen mit den annotierten Objekten in relationalen Datenbanken...

In this paper the properties of node-node adjacency matrix in acyclic digraphs are considered. It is shown that topological ordering and node-node adjacency matrix are closely related. In fact, first the one to one correspondence between upper triangularity of node-node adjacency matrix and existence of directed cycles in digraphs is proved and then with this correspondence other properties of ...

The cholinergic innervation of the rabbit heart was studied in vitro and in vivo. An isolated preparation, which included the combined atria, S-A node, A-V node and bundle of His, was mounted so that microelectrodes could be placed in either the specialized or nonspecialized tissues. Using a roving monopolar electrode, local transmural electrical stimulation of intracardiac nerves (nerve stimul...

In a multi-hop wireless sensor network (WSN) with a constant node density, the nodes that are one hop away from the Sink die first and cause an “energy hole,” because they must forward the traffic from the rest of the network. When this hole forms, a large amount of “excess” energy is trapped in the other nodes. In this paper, we propose that some of those other nodes use some of the excess ene...