570 research outputs found
Connection Admission Control Issues for a CDMA Return Link in the Aeronautical Broadband Communication System
No full textOne of the hot topics in the communication world is to realize a network able to offer a combination of services complying with different requirements in every place of the world, thus achieving the concept of "entertainment everywhere". In such a context a key role is played by aeronautical world that seems to be one of the last remaining islands in which broadband communications are not available. The present paper aims at studying resource management for a CDMA-based return link via satellite to provide passengers with new generation services. We focus on the connection admission control problem for QoS guarantees, analyzing in particular, the effective bandwidth concept over CDMA discussing its applicability to a multi-service packet switched network. Two admission control algorithms are then derived, based on the effective bandwidth concept for the circuit switched-like services and on a moving average window and linear predictor model for packet switched services. Finally, the performance over aeronautical broadband communication system is evaluated. © 2005 IEEE
Resource allocation policies for QoS guarantee service provision over a CDMA satellite return link in the aircraft broadband communication system
No full textIn Next Generation Networks (NGN) a variety of services with different requirements, like real time communications, broadband Internet access, email services are expected. Consequently, Packet Scheduling mechanisms and Resource Allocation techniques for Quality of Service (QoS) guarantees will play a key role. This paper proposes two resource allocation strategies for a CDMA satellite return link, based on a Orthogonal Variable Spreading Factor (OVSF) codes with Earliest Deadline First policy (also referred to as Single Code CDMA) and Multi-Code with Generalized Processor Sharing policy (also referred to as Multi Code CDMA), respectively. Moreover a Minimum Power Allocation algorithm is implemented in order to maximize system capacity and guarantee Bit Error Rate (BER) requirements. An avionic environment has been taken as reference scenario and it is referred to as AirCom. The effectiveness of the two proposed algorithms for such a scenario is evaluated by means of software simulations using OPNET modeler. The work presented in this paper has been partially inserted in the framework of EU NATACHA project. © 2005 IEEE
3He-counter tests for a 3He-neutron monitor section: Results from a preliminary evaluation
No full textDuring the year's couple 2002-2003 several tests were performed at the SVIRCO OBSERVATORY (CNR-IFSI -UNIRomaTre collaboration) to evaluate the possible use of 3He proportional counters in standard neutr:on monitors. Preliminary results suggest the compatibility of the 3He counters with the 10BF3 ones
L'impresario burlato // Del Sig.r D.n Luigi Mosca
No full textTitre uniforme : Mosca, Luigi (1775-1824). Compositeur. [L'impresario burlato]Titre pris à la p. de titre originelle du vol. 2, sur laquelle le f. de garde a été collé, puis partiellement décollé. - Dans les 2 vol., titre "Gli Amori Teatrali" et attribution erronées à Pietro Guglielmi sur le f. de garde recouvrant la p. de titre originelle. - Identifié d'après RISM A/II no. 850012275 et I-Nc/ 29.4.1-2. - Opera buffa en 2 actes. - Livret de Francescantonio Signoretti. - 1re représentation : Naples, Théâtre Nuovo, carnaval 1797. - Rôles : Albertina (Ut 1), Madama (Ut 1), Raimondo (Ut 4), Prospero (Fa 4), Oronzio (Fa 4), Carlotta (Ut 1), Calandrino (Fa 4), Terebillo (Ut 4). - Vl 2, vla, b, ob 2, fag, cl 2, cor (en ré, mi bémol, fa, sol)Présentation musicale : [Partition]Incipit : Vanne, vanne altrove i giorni miei (Raimondo)Appartient à l’ensemble documentaire : RISM2Appartient à l’ensemble documentaire : RISMMssOpéras buffa -- +* 1700......- 1799......+:18e siècle
L'impresario burlato // Del Sig.r D.n Luigi Mosca
No full textTitre uniforme : Mosca, Luigi (1775-1824). Compositeur. [L'impresario burlato]Titre pris à la p. de titre originelle du vol. 2, sur laquelle le f. de garde a été collé, puis partiellement décollé. - Dans les 2 vol., titre "Gli Amori Teatrali" et attribution erronées à Pietro Guglielmi sur le f. de garde recouvrant la p. de titre originelle. - Identifié d'après RISM A/II no. 850012275 et I-Nc/ 29.4.1-2. - Opera buffa en 2 actes. - Livret de Francescantonio Signoretti. - 1re représentation : Naples, Théâtre Nuovo, carnaval 1797. - Rôles : Albertina (Ut 1), Madama (Ut 1), Raimondo (Ut 4), Prospero (Fa 4), Oronzio (Fa 4), Carlotta (Ut 1), Calandrino (Fa 4), Terebillo (Ut 4). - Vl 2, vla, b, ob 2, fag, cl 2, cor (en ré, mi bémol, fa, sol)Présentation musicale : [Partition]Incipit : Vanne, vanne altrove i giorni miei (Raimondo)Appartient à l’ensemble documentaire : RISM2Appartient à l’ensemble documentaire : RISMMssOpéras buffa -- +* 1700......- 1799......+:18e siècle
Downscaling of Hourly Climate Data for the Assessment of Building Energy Performance
No full textIn Italy, the calculation of the energy needs of buildings has been mainly based on quasi-steady state calculation procedures. Nowadays, the increasing interest in more detailed energy analysis for high-efficiency buildings requires more accurate calculation methods. In this work, starting from the hourly data of UNI 10349, the downscaling of a typical meteorological year was carried out by applying different mathematical and physical models for the main climate variables considered in the energy balance of a building to be used in dynamic simulation tools. All results were validated with one-minute measurements observed at the ENEA Research Centre in Rome, Italy. The results showed an MBE% of 0.008% and RMSE% of 0.114% using the interpolation spline method for the temperature, while, for the global horizontal irradiance, applying the novel sinusoidal–physical interpolation method showed an MBE% of −0.4% and an RMSE% of 31.8% for the 1 min observation data. In this paper, an easily implemented novel model for downscaling solar irradiance for all sky conditions that takes into account the physical aspects of atmospheric phenomena is presented
A phase 1 study of buparlisib and bevacizumab in patients with metastatic renal cell carcinoma progressing on vascular endothelial growth factor-targeted therapies
No full textAbstract not availableRana R. McKay, Guillermo De Velasco, Lillian Werner, Joaquim Bellmunt, Lauren Harshman, Christopher Sweeney, Jonathan E. Rosenberg, Michelle Hirsch, Sabina Signoretti, Eliezer M. Van Allen, Meghara Walsh, Ulka Vaishampayan, David F. McDermott, and Toni K. Choueir
Development of daylight availability maps in Italy: Methodology and validation
No full textThis paper describes a study aimed at providing outdoor illuminance data in Italy, to be used to evaluate daylight potential contribution in the energy performance of buildings. Starting from solar radiation data, a luminous efficacy model was implemented to derive outdoor illuminance for Italian territory. The results obtained were compared with ground measurements, carried out in three different Italian sites (Milan, Rome and Lampedusa island), and the accuracy of model, has been improved introducing specific metrics for Italian context. Typical Meteorological Years (TMYs) of global and diffused components of daylight illuminance, were built for 243 locations, considering different time profiles. Since the definition of the spatial and temporal trend of environmental variables or metrics requires the application of appropriate interpolation procedure, geostatistic methods (kriging), was used to develop Italian daylight maps. The daylight availability maps will be included in the Italian database of solar radiation (www.solaritaly.enea.it) providing an useful tool for lighting energy performances in buildings applications
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