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.
A Gaussian multiple access wire-tap channel with confidential messages is studied, where multiple users attempt to transmit private messages to a legitimate receiver in the presence of an eavesdropper. While prior work focused on the case where the users were cooperative, we assume that each user is selfish and and so are modeled as playing a non-cooperative game. We assume all users send a superposition...
In lateral photo-Dember emitters pulses of coherent terahertz radiation can be generated by ultrafast above bandgap laser illumination of the surface of a partially metallic masked semiconductor. We investigate the role of the metallic mask and how the emission depends on spot size and fluence.
Parareal [1] is a recent time parallelization algorithm based on a predictor-corrector scheme. On the predictor stage, a fast coarse solver gives an approximate solution for all the simulation time. On the correction stage, the fine solver is used for correcting the result. The process is iterated until convergence. A successful application of parareal to an specific problem depend strongly on finding...
The development of supersonic retro-propulsion, an enabling technology for heavy payload exploration missions to Mars, is the primary focus for the present paper. A new experimental model, intended to provide computational fluid dynamics model validation data, was recently designed for the Langley Research Center Unitary Plan Wind Tunnel Test Section 2. Pre-test computations were instrumental for...
Compound semiconductors detectors, such as Cadmium Telluride (CdTe) and Cadmium Zinc Telluride (CdZnTe), have demonstrated spectroscopic performances for X- and Gamma-ray detection at room temperature operation. Several groups are working on using these detector materials for use in high rate photon counting / energy resolving pixelated detector systems. This paper is focused on the modelling from...
An integrated and comprehensive model of a hybrid pixel detector has been developed by using Matlab and Simulink. Prior to this streamlined model, various team members (physicists, electronics and software engineers) used different software tools to separately simulate individual entities of the system. As a consequence, it was difficult to exchange and integrate the results, as well as to interpret...
The fabricated analog application specific integrated circuit (ASIC) is a front-end circuit for multichannel pixel detector system. The designed ASIC provides signal amplification for a pixelated arrays of 1 mm and 200 ??m pitch pixel detectors made from cadmium telluride (CdTe) and cadmium zinc telluride (CZT) detector. Both the detector and ASIC are combined to target future high intensity research...
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.