The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The origin of the anomalous infra-red and Raman modes in acetanilide (C6H5NHCOCH3, or ACN)(1) , remains a subject of considerable controversy. One family of theoretical models involves Davydov-like solitons (2) nonlinear vibrational coupling (3), or “polaronic” localized modes (4)(5). An alternative interpretation of the extra-bands in terms of a Fermi resonance was proposed (6) and recently the existence...
The demand for location awareness and, therefore, the demand for self-localization techniques is continuously increasing. As a result, a good number of systems and methods for self-localization have been developed. Almost every system described in the literature exploits specific hardware or scenario features to solve the positioning issue, e.g. by using anchor nodes, relying on distances or angles,...
The ever-growing need for reliable sensors and microsystems that can withstand strong temperature changes as well as impacts presents new challenges for the packaging industry. Research in this field thus focuses equally on the development of high temperature stable material systems and customized packaging technologies. Wire bonding is one of the preferred techniques, but high hardness of refractory...
It has been shown that paragliders could considerably benefit from ad-hoc communication, be it for safety or the prolonging of flight times through the exchange of thermal information. The simulation of these so called Flying Ad-Hoc Networks (FANETs) can help evaluate the feasibility and performance of these and other applications inexpensively and at large scale. Their specific communication characteristics,...
Foot-launched gliders rely on thermal columns in order to stay in the air. Unfortunately, it can be a very difficult task for a pilot to find these invisible thermals as accurate off-line computation and prediction of air flows is nearly impossible. We therefore propose to wirelessly interconnect hang and paragliders to form a Flying Ad-Hoc Network (FANET). This network enables pilots to collect and...
Indoor hovering objects such as quadrotors need to be controlled continuously to hold their position in space. In order to support fully autonomous flights of these copters, the necessary position control including all related information transfers have to be provided in a fully decentralized and autonomous manner. We discuss challenges related to flight control based on our Autonomous Localization...
Self-deployment describes the task of spreading an autonomously moving swarm of mobile robots over a given area. All these robots have to move to locations such that the set of robot locations satisfies a desired property. In this work, we describe a fully distributed deployment algorithm executed locally at each robot. The approach requires only few local information per node: the distances and very...
We present a fully self-organizing approach for creating and maintaining a reference coordinate system for self-localization in Sensor and Actor Networks (SANETs). GPS technology has become a de facto standard for outdoor localization, however, self-localization in GPS denied scenarios is still extremely challenging. Typically, anchor nodes or global state information are used to update the nodes'...
A lot of algorithms and applications can benefit from position information. GPS localization has become a standard for outdoor usage. But if a higher accuracy is needed or within GPS-denied areas providing this knowledge is still an open and nontrivial topic. Especially for unknown or dynamic environments. In this paper we propose a framework which is capable of autonomously exploring unknown environments...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.