Compressive Random Access Using A Common Overloaded Control Channel

We introduce a "one shot" random access procedure where users can send a message without a priori synchronizing with the network. In this procedure a common overloaded control channel is used to jointly detect sparse user activity and sparse channel profiles. The detected information is subsequently used to demodulate the data in dedicated frequency slots. We analyze the system theoretically and provide a link between achievable rates and standard compressing sensing estimates in terms of explicit expressions and scaling laws. Finally, we support our findings with simulations in an LTE-A-like setting allowing "one shot" sparse random access of 100 users in 1ms.Comment: 6 pages, 3 figures, published at Globecom 201

Development of an autonomous distributed multiagent monitoring system for the automatic classification of end users

The purpose of this study is to investigate the feasibility of constructing a software Multi-Agent based monitoring and classification system and utilizing it to provide an automated and accurate classification for end users developing applications in the spreadsheet domain. Resulting in, is the creation of the Multi-Agent Classification System (MACS). The Microsoft‘s .NET Windows Service based agents were utilized to develop the Monitoring Agents of MACS. These agents function autonomously to provide continuous and periodic monitoring of spreadsheet workbooks by content. .NET Windows Communication Foundation (WCF) Services technology was used together with the Service Oriented Architecture (SOA) approach for the distribution of the agents over the World Wide Web in order to satisfy the monitoring and classification of the multiple developer aspect. The Prometheus agent oriented design methodology and its accompanying Prometheus Design Tool (PDT) was employed for specifying and designing the agents of MACS, and Visual Studio.NET 2008 for creating the agency using visual C# programming language. MACS was evaluated against classification criteria from the literature with the support of using real-time data collected from a target group of excel spreadsheet developers over a network. The Monitoring Agents were configured to execute automatically, without any user intervention as windows service processes in the .NET web server application of the system. These distributed agents listen to and read the contents of excel spreadsheets development activities in terms of file and author properties, function and formulas used, and Visual Basic for Application (VBA) macro code constructs. Data gathered by the Monitoring Agents from various resources over a period of time was collected and filtered by a Database Updater Agent residing in the .NET client application of the system. This agent then transfers and stores the data in Oracle server database via Oracle stored procedures for further processing that leads to the classification of the end user developers. Oracle data mining classification algorithms: Naive Bayes, Adaptive Naive Bayes, Decision Trees, and Support Vector Machine were utilized to analyse the results from the data gathering process in order to automate the classification of excel spreadsheet developers. The accuracy of the predictions achieved by the models was compared. The results of the comparison showed that Naive Bayes classifier achieved the best results with accuracy of 0.978. Therefore, the MACS can be utilized to provide a Multi-Agent based automated classification solution to spreadsheet developers with a high degree of accuracy

Economic Contribution of Cultural Industries: Evidence from some Selected Countries

Cultural industries have become a significant component of modern economies There is increasing attention measuring the economic contribution of these industries at national levels particularly their impact on economic variables The objective of this study is to illustrate concepts approaches methodologies related to cultural economics Moreover to shed light on measuring methods of the economic contribution of cultural industries Using descriptive analysis we examined the use of these approaches in some selected countries These countries are UK Finland France Germany Italy and Spain from Europe Canada and USA from North America Australia China and India from the Asia-pacific region South American economic organization MERCOSUR countries for the South American region South Africa and Egypt from Africa region The main results revealed the increasing realization of measuring cultural economic contributions in developed countries rather than developing countries Yet data limitation is still the main problem of measuring the economic contribution of cultural industries Furthermore for international comparison purposes there is a real need to develop new common concepts and measurements of the economic contribution of cultural industrie

A framing analysis of Al-Jazeera\u27s coverage of the Palestinian Fatah-Hamas conflict.

By utilizing both framing and descriptive analysis, this study examined how an Arab media outlet, Al-Jazeera, with an increasingly global reach framed the Palestinian-Palestinian conflict. The 2006 Palestinian legislative elections and the 2007 fall-of-Gaza under the control of Hamas were two critical Palestinian events that warranted an examination of how coverage of these two periods was framed. Thirty frames were found in Al-Jazeera\u27s coverage of the two mentioned critical events. These frames were categorized into seven major sets of frames. The civil war and the politics\u27 sets of frames dominated Al-Jazeera\u27s coverage in the fall-of-Gaza period, and the elections and politics\u27 sets of frames dominated Al-Jazeera\u27s coverage in the elections\u27 period. The study tested the tone of the coverage to determine whether there was favoritism shown to Hamas. Overall, the channel\u27s presentation of the news related to Palestinian coverage was neutral with significant favoritism to Hamas especially in the fall-of-Gaza period. Another finding of this study was that Al-Jazeera\u27s coverage of both time periods was heavily episodic. Two compositional elements, camera angle and proximity of subject to viewer, were analyzed for this study, and Al-Jazeera conveyed a sense of credibility and objectivity by using images that act as records of events. Therefore, visual elements were not used as framing devices that would result in favoritism to Hamas

Secure Equality Test Technique Using Identity-Based Signcryption for Telemedicine Systems

For telemedicine, wireless body area network (WBAN) offers enormous benefits where a patient can be remotely monitored without compromising the mobility of remote treatments. With the advent of high capacity and reliable wireless networks, WBANs are used in several remote monitoring systems, limiting the COVID-19 spread. The sensitivity of telemedicine applications mandates confidentiality and privacy requirements. In this article, we propose a secure WBAN-19 telemedicine system to overcome the pervasiveness of contagious deceases utilizing a novel aggregate identity-based signcryption scheme with an equality test feature. We demonstrate a security analysis regarding indistinguishable adaptive chosen-ciphertext attack (IND-CCA2), one-way security against adaptive chosen-ciphertext attack (OW-CCA2), and unforgeability against adaptive chosen-message attack (EUF-CMA) under the random oracle model. The security analysis of the scheme is followed by complexity evaluations where the computation cost and communication overhead are measured. The evaluation demonstrates that the proposed model is efficient and applicable in telemedicine systems with high-performance capacities

Traffic Accidents at Hazardous Locations of Urban Roads

This study aims at highlighting the most contributing and influential factors to accident occurrence at hazardous locations of local urban roads, and correlating accident characteristics to different factors including geometric elements, traffic speed, pavement type, lighting conditions, type of collisions, pedestrian facilities existence and traffic conditions. The study was conducted using twenty-eight hazardous locations at Amman-Jordan roads. Each of the hazardous locations had at least twenty accidents and two fatality records per year. Data were collected through different sources that included Great Amman Municipality, Traffic Institute, Police Traffic Department and field studies. Different stepwise statistical regression models were developed to correlate accident characteristics with the studied variables. It was found that the logarithmic and linear models were the most significant and realistic models that can be used to predict the relationship between the accident characteristics as a dependent variable and the other studied variables as independent variables. The developed models were strong and predictable because the coefficient of multiple determinations was very close to the adjusted coefficient of multiple determinations. The following variables were found to be the most significant contributors to traffic accidents at hazardous locations: average running speed, posted speed, maximum and average degree of horizontal curves, number of vertical curves, median width, type of road surface, lighting (day or night), number of vehicles per hour, number of pedestrian crossing facilities and percentage of trucks. The study could open the door for planners and traffic engineers to overcome the problems associated with traffic accident occurrence at hazardous locations and enhance their safety. The developed models showed that accident characteristics such as number of accidents, number of fatalities, number of injuries, type of accident and number of vehicles involved in accidents, and statistics of hazardous locations could be predicted if the traffic conditions, geometric elements and environmental variables are known. The study could also be enhanced if incorporated with drivers’ characteristics including socio-economic data

Study of the Azo Hydrazone Tautomerism in the 4-(9-Anthrylazo) Phenol

The spectroscopic study on 4-(9-anthrylazo) phenol has revealed that the azo dye under study exists in two tautomeric forms which are azo phenol and hydrazo keto forms in ratio of almost (1:1). The azo hydrazone tautomerism was confirmed by the use of IR spectroscopy and HNMR in which the characteristic absorption bands and chemical shifts for both tautomers were assigned

Preparation and Characterization of a Surface Modified Amberlite IRA 402 Resin by Nano Iron Oxide and its Application for Uranium Separation

A nano-iron oxide modified Amberlite IRA402 resin was prepared by the reaction of iron(II) and iron(III) ions in the presence of ammonium solution

Effect of four irrigation solutions on the intraocular pressure and total bacterial count of the normal eye in dogs

There are numerous agents that have been used for irrigation of the ocular tissue from attached foreign bodies, inflammatory exudate and microorganisms. For evaluation of four agents of these irrigation solutions, sixteen clinically healthy dogs of both sexes were used in this study. The dogs were allocated into four equal groups. The right eye of dogs for each group was irrigated 3 times daily for three successive days. The groups were irrigated as following: The first group: ringer’s lactate, the second group: normal saline 0.9%, the third group: boric acid 2% and sodium bicarbonate 1% was used for the fourth group. The left eye was considered control one. The results revealed that the four solutions did not cause any obvious alteration of the eyes and change the intraocular pressure (IOP). According to their effects on the total bacterial count, the four irrigation solutions had not any significant effect. It could be concluded that all of these agents may be used for irrigation of the intact eye and removal of the attached exudate and foreign bodies

LASER BEAM WELDING EFFECT ON THE MICROHARDNESS OF WELDING AREA OF 304 STAINLESS STEEL & LOW CARBON STEEL

During laser beam welding focused high-capacity laser beam moved over the seam of the parts to be welded. The high intensity of the laser beam causes both parts to highly melt. In the melting bath a so-called keyhole formed, which enables the deep penetration of the laser beam. The melting bath solidifies quickly after the laser beam has passed, where strong connection with good metallurgical characteristics is the result. For this research, the laser sources applied for laser welding are mainly the CO2 laser. This research aimed to an attempt to investigate the microhardness changes of the welding area to unsimilar metals and which occur during the welding processes between unsimilar metals (304 stainless steel & low carbon steel), where the surface of laser beam welding offers deepness up to (3mm), The variables studied, which may have an effect on the welding processes, discussing the relationship between the welding parameter and Microhardness of welded joint and explaining the major effected of these variables (power) on the welding area