The Mixing and Transport Properties of the Simulated ICM: a Study with Tracers (2009)
Vazza, F., Gheller, C., Brunetti, G.
We present a study of the mixing properties of the simulated Intra Cluster Medium, using tracers particles that are advected by the gas flow during the evolution of cosmic structures. Using a sample...
Unveiling radio halos in galaxy clusters in the LOFAR era (2009)
Cassano, R., Brunetti, G., Rottgering, H. J. A., Bruggen, M.
Giant radio halos are mega-parsec scale synchrotron sources detected in a fraction of massive and merging galaxy clusters. Radio halos provide one of the most important pieces of evidence for...
Giant radio halos are the most relevant examples of diffuse synchrotron emission from galaxy clusters. A number of these sources have very steep spectrum, with spectral index $\alpha \geq 1.5-1.6$...
On the evolution of giant radio halos and their connection with cluster mergers (2009)
Brunetti, G., Cassano, R., Dolag, K., Setti, G.
Giant radio halos are diffuse, Mpc-scale, synchrotron sources located in the central regions of galaxy clusters and provide the most relevant example of cluster non-thermal activity. Radio and X-ray...
A giant radio halo in the massive and merging cluster Abell 1351 (2009)
Giacintucci, S., Venturi, T., Cassano, R., Dallacasa, D., Brunetti, G.
We report on the detection of diffuse radio emission in the X-ray luminous and massive galaxy cluster A1351 (z=0.322) using archival Very Large Array data at 1.4 GHz. Given its central location,...
Testing the radio halo-cluster merger scenario. The case of RXCJ2003.5-2323 (2009)
Giacintucci, S., Venturi, T., Brunetti, G., Dallacasa, D., Mazzotta, P., Cassano, R., ...
We present a combined radio, X-ray and optical study of the galaxy cluster RXCJ2003.5-2323. The cluster hosts one of the largest, most powerful and distant giant radio halos known to date, suggesting...
Turbulent Motions and Shocks Waves in Galaxy Clusters simulated with AMR (2009)
Vazza, F., Brunetti, G., Kritsuk, A., Wagner, R., Gheller, C., Norman, M .
We have implemented an Adaptive Mesh Refinement criterion explicitly designed to increase spatial resolution around discontinuities in the velocity field in ENZO cosmological simulations. With this...
Radio Halos From Simulations And Hadronic Models I: The Coma cluster (2009)
Donnert, J., Dolag, K., Brunetti, G., Cassano, R., Bonafede, A.
We use the results from a constrained, cosmological MHD simulation of the Local Universe to predict the radio halo and the gamma-ray flux from the Coma cluster and compare it to current observations....
Deep 1.4 GHZ Follow Up of the Steep Spectrum Radio Halo in Abell 521 (2009)
Dallacasa, D., Brunetti, G., Giacintucci, S., Cassano, R., Venturi, T., Macario, G., ...
In a recent paper we reported on the discovery of a radio halo with very steep spectrum in the merging galaxy cluster Abell 521 through observations with the Giant Metrewave Radio Telescope (GMRT)....
The GMRT Radio Halo Survey and low frequency follow-up (2009)
Venturi, T., Giacintucci, S., Cassano, R., Brunetti, G., Dallacasa, D., Macario, G., ...
The GMRT Radio Halo Survey, carried out at 610 MHz to investigate the statistical properties of cluster radio halos in a complete cluster sample selected in the redshift interval z=0.2-0.4, has...
Diffuse baryonic matter beyond 2020 (2009)
Markevitch, M., Nicastro, F., Nulsen, P., Rasia, E., Vikhlinin, A., Kravtsov, A., ...
The hot, diffuse gas that fills the largest overdense structures in the Universe -- clusters of galaxies and a web of giant filaments connecting them -- provides us with tools to address a wide array...
High energy emission from galaxy clusters and particle acceleration due to MHD turbulence (2009)
Brunetti, G., Blasi, P., Cassano, R., Gabici, S.
In the next years the FERMI gamma ray telescope and the Cherenkov telescopes will put very stringent constraints to models of gamma ray emission from galaxy clusters providing crucial information on...
Gamma ray emission and stochastic particle acceleration in galaxy clusters (2008)
Brunetti, G., Blasi, P., Cassano, R., Gabici, S.
FERMI (formely GLAST) will shortly provide crucial information on relativistic particles in galaxy clusters. We discuss non-thermal emission in the context of general calculations in which...
A low-frequency radio halo associated with a cluster of galaxies (2008)
Brunetti, G., Giacintucci, S., Cassano, R., Lane, W., Dallacasa, D., Venturi, T., ...
Clusters of galaxies are the largest gravitationally bound objects in the Universe, containing about 10^15 solar masses of hot (10^8 K) gas, galaxies and dark matter in a typical volume of about 10...
NIR/Optical Counterparts of Hotspots in Radio Galaxies (2008)
Prieto, M. A., Brunetti, G., Orienti, M.
We present new high spatial resolution VLT and VLA observations of a sample of nine low-power (P_{1.4 GHz} < 10^{25} W/Hz) radio hotspots. Infrared/optical emission is definitely detected in four of...
FERMI (formely GLAST) and LOFAR will shortly provide crucial information on the non-thermal components (relativistic particles and magnetic field) in galaxy clusters. After discussing observational...
Tingay, S. J., Lenc, E., Brunetti, G., Bondi, M.
Images made with the VLBA have resolved the region in a nearby radio galaxy, Pictor A, where the relativistic jet that originates at the nucleus terminates in an interaction with the intergalactic...
A Multiple Neural Network System to Classify Solder Joints on Integrated Circuits (2008)
G. Acciani, G. Brunetti, G. Fornarelli
Abstract: The following paper introduces a diagnostic process to detect solder joint defects on Printed Circuit Boards assembled in Surface Mounting Technology. The diagnosis is accomplished by a...
Vazza, F., Brunetti, G., Gheller, C.
We analyze the properties of Large Scale Shocks in a cosmological volume of size 103Mpc/h simulated with the public 1.0.1 release of the ENZO code. Different methods to identify and characterize...
A morphological comparison between giant radio halos and radio mini--halos in galaxy clusters (2008)
Cassano, R., Gitti, M., Brunetti, G.
In this letter we present a morphological comparison between giant radio halos and radio mini-halos in galaxy clusters based on radio--X-ray luminosity, P_{1.4}-L_X, and radio luminosity-size,...
Cosmological Shocks in Eulerian Simulations: Main Properties and Cosmic Rays Acceleration (2008)
Vazza, F., Brunetti, G., Gheller, C.
Aims: morpholgies, number and energy distributions of Cosmological Shock Waves from a set of ENZO cosmological simulations are produced, along with a study of the connection with Cosmic Rays...
Venturi, T., Giacintucci, S., Dallacasa, D., Cassano, R., Brunetti, G., Bardelli, S., ...
We present the results of the GMRT cluster radio halo survey. The main purposes of our observational project are to measure which fraction of massive galaxy clusters in the redshift range z=0.2--0.4...
Shock acceleration as origin of the radio relic in A521? (2008)
Giacintucci, S., Venturi, T., Macario, G., Dallacasa, D., Brunetti, G., Markevitch, M., ...
We present new high sensitivity observations of the radio relic in A521 carried out with the Giant Metrewave Radio Telescope at 327 MHz and with the Very Large Array at 4.9 and 8.5 GHz. We imaged the...
Die Interaktion des Menschen mit seiner intelligenten Umgebung (2008)
Encarnação, J.L., Brunetti, G., Jähne, M.
Ein Trend der Informations- und Kommunikationstechnologie ist ihre zunehmende Integration in alltägliche Gebrauchsgegenstände, so dass diese zu mobilen und multimedialen Endgeräten werden....
Cybertechnologien als Werkzeug im Bauwesen (2008)
Encarnação, J.L., Brunetti, G.
Umgangssprachlich diente der Ausdruck Cyberspace vor allem in den 1990er Jahren zumeist als Synomym für das Internet oder spezieller das World Wide Web (WWW). Die technik- und...
Tingay, Steven, Lenc, E., Brunetti, G., Bondi, M.
Images made with the Very Long Baseline Array (VLBA) have resolved the region in a nearby (z = 0.035) radio galaxy, Pictor A, where the relativistic jet that originates at the nucleus terminates in...
Revised statistics of radio halos and the re-acceleration model (2007)
Cassano, R., Brunetti, G., Venturi, T., Setti, G., Dallacasa, D., Giacintucci, S., ...
Aims. The statistical properties of radio halos can be used to discriminate among the possible models for their origin. Therefore an unbiased and exhaustive investigation in this direction is...
Hard X-rays from Galaxy Clusters and SIMBOL-X (2007)
Brunetti, G., Cassano, R., Setti, G.
Non thermal emission from galaxy clusters demonstrates the existence of relativistic particles and magnetic fields in the Intra Cluster Medium (ICM). Present instruments do not allow to firmly...
Cosmic rays and Radio Halos in galaxy clusters : new constraints from radio observations (2007)
Brunetti, G., Venturi, T., Dallacasa, D., Cassano, R., Dolag, K., Giacintucci, S., ...
Clusters of galaxies are sites of acceleration of charged particles and sources of non-thermal radiation. We report on new constraints on the population of cosmic rays in the Intra Cluster Medium...
An X-ray view of Pictor A radio lobes: a spatially resolved study (2007)
Migliori, G., Grandi, P., Palumbo, G. C. G., Brunetti, G., Stanghellini, C.
A spatially resolved analysis of the lobes of the radio galaxy Pictor A has been performed for the first time starting from a 50 ksec XMM-Newton observation. Magnetic field, B_{IC}, particle density,...
New scaling relations in cluster radio halos and the re-acceleration model (2007)
Cassano, R., Brunetti, G., Setti, G., Govoni, F., Dolag, K.
In this paper we derive new expected scaling relations for clusters with giant radio halos in the framework of the re-acceleration scenario in a simplified, but physically motivated, form, namely:...
Radio Lobes of Pictor A: an X-ray spatially resolved Study (2007)
Migliori, G., Grandi, P., Palumbo, G. G. C., Brunetti, G., Stanghellini, C.
A new XMM observation has made possible a detailed study of both lobes of the radio galaxy Pictor A. Their X-ray emission is of non thermal origin and due to Inverse Compton scattering of the...
Compressible Turbulence in Galaxy Clusters: Physics and Stochastic Particle Re-acceleration (2007)
We attempt to explain the non-thermal emission arising from galaxy clusters as a result of the re-acceleration of electrons by compressible turbulence induced by cluster mergers. In our model...
Low-Frequency study of two clusters of galaxies: A2744 and A2219 (2007)
Orru', E., Murgia, M., Feretti, L., Govoni, F., Brunetti, G., Giovannini, G., ...
Spectral index images can be used to constraint the energy spectrum of relativistic electrons and magnetic field distribution in radio halos and relics, providing useful information to understand...
Constraint-based virtual conceptual design (2007)
This paper introduces an approach towards modelling and validation of mechanisms in the conceptual design phase applying virtual reality techniques and kinematics simulation. The presented system...
Segura, A., Moreno, A., Brunetti, G., Henn, T.
We present the work on a simulator of construction machinery developed to train workers in their safe use. The simulation setup consists of a real versatile cabin placed on a motion platform in order...
Cosmic rays and radio halos in galaxy clusters: new constraints from radio observations (2007)
Brunetti, G., Venturi, T., Dallacasa, D., Cassano, R., Dolag, K., Giacintucci, S., ...
Visualization for an augmented reality construction machinery simulator (2007)
Segura, A., Moreno, A., Brunetti, G., Henn, T.
This work presents a versatile real-time simulator for training workers in the operation of construction machinery. With the aim of reducing the accident rate in the construction sector, a realistic...
Come gli scienziati di Adelaide hanno sconfitto la creatura (Naegleria) della laguna nera (2007)
Vitale, E., Carbone, M., Ferrante, Antonio, Pittarelli, G., Piccirillo, C., Buontempo, S., ...
Come gli scienziati di Adelaide hanno sconfitto la creatura (Naegleria) della laguna nera (2007)
Vitale, E., Carbone, M., Ferrante, A., Pittarelli, G., Piccirillo, C., Buontempo, S., ...
GMRT Radio Halo Survey in galaxy clusters at z = 0.2 -- 0.4 I.The REFLEX sub--sample (2006)
Venturi, T., Giacintucci, S., Brunetti, G., Cassano, R., Bardelli, S., Dallacasa, D., ...
Aims. We present the first results of an ongoing project devoted to the search of giant radio halos in galaxy clusters located in the redshift range z=0.2--0.4. One of the main goals of our study is...
Statistics of Giant Radio Halos from Electron Reacceleration Models (2006)
Cassano, R., Brunetti, G., Setti, G.
The most important evidence of non-thermal phenomena in galaxy clusters comes from Giant Radio Halos (GRHs), synchrotron radio sources extended over Mpc scales, detected in a growing number of...
Turbulent Velocity Fields in SPH--simulated Galaxy Clusters (2006)
Vazza, F., Tormen, G., Cassano, R., Brunetti, G., Dolag, K.
We present a study of the turbulent velocity fields in the Intra Cluster Medium of a sample of 21 galaxy clusters simulated by the SPH--code Gadget2, using a new numerical scheme where the artificial...
Constraining B in galaxy clusters from statistics of giant radio halos (2006)
Cassano, R., Brunetti, G., Setti, G.
There are several possibilities to constrain the value of the magnetic field in the ICM, the most direct ones being the combination of inverse Compton and synchrotron observations, and the Faraday...
Computer graphics applications in virtual engineering (2006)
Binotto, A., Brunetti, G., Pereira, C.E., Santos, P.
The application of computer graphics and communication technology in the product development process leads to virtual engineering that, besides excellence in engineering, is becoming a key factor for...
Computer graphics applications in virtual engineering (2006)
Binotto, A., Brunetti, G., Gierlinger, T., Pereira, C.E., Santos, P., Stork, A.
The application of computer graphics and communication technology in the product development process leads to virtual engineering that, besides Computer-Aided Design/Engineering (CAD/CAE) and Product...
VAR-trainer: Versatile construction machinery simulator for security training (2006)
Barrera, C., Richard, S., Brunetti, G., Henn, T., Esnaola-Martinez, A.I., Arrese-Pujana, A., ...
This paper deals with the approaches used for the development of the real-time dynamic models and a mixed reality setup for simulating four different types of construction machinery in the framework...
Handling shape semantics in virtual styling (2006)
Brunetti, G., Ucelli, G., Santos, P., Amicis, R. De, Stork, A.
Multimedia content and 3D models play an important role in many industrial applications. Therefore semantic processing for the purposes of comparing, cataloging and archiving 2D and 3D shapes is a...
Constraint-based virtual conceptual design (2006)
Brunetti, G., Schneider, P., Stork, A.
The paper introduces an approach towards modeling and validation of mechanisms in the conceptual design phase applying virtual reality techniques and kinematics simulation. The presented system...
Acquiring, structuring shapes and annotating them with semantics to improve design activities (2006)
Giannini, F., Falcidieno, B., Brunetti, G., Graf, H., Stork, A., ...
Shapes incorporate geometry as well as semantics and can be defined in 2D, 3D or higher dimensions. Geometric models can be structured in such a way that they can provide a relevant framework to...
Westkämper, E., Mersinger, M., Encarnação, J.L., Rix, J., Brunetti, G.
Ziel des Projektes war die Umsetzung von Kooperationsmöglichkeiten der Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. und brasilianischen Forschungseinrichtungen zur Stärkung...
Kalantary, B., Brunetti, G., Segura, A., Moreno, A., Hofmann, U.
Machinery specific simulators are designed for realistic and immersive "look and feel" of environments and behaviors of the real artifacts they resemble. But often only the "feel" component of such...
Kalantary, B., Brunetti, G., Segura, A., Moreno, A., Hofmann, U.
Machinery specific simulators are designed for realistic and immersive "look and feel" of environments and behaviors of the real artifacts they resemble. But often only the "feel"...
Migliori, G., Grandi, P., Palumbo, G. G. C., Brunetti, G., Malaguti, G., Guainazzi, M.
X-ray emission from the eastern radio lobe of the FRII Radio Galaxy Pictor A was serendipitously discovered by a short observation of XMM-Newton in 2001. The X-ray spectrum, accumulated on a region...
The cluster relic source in A521 (2005)
Giacintucci, S., Venturi, T., Bardelli, S., Brunetti, G., Cassano, R., Dallacasa, D.
We present high sensitivity radio observations of the merging cluster A521, at a mean redsfhit z=0.247. The observations were carried out with the GMRT at 610 MHz and cover a region of $\sim$1 square...
In a previous paper (Brunetti et al. 2004) we presented the first self-consistent calculations of the time-dependent coupled equations for the electrons, hadrons and Alfv\'en waves in the...
Turbulent gas motions in galaxy cluster simulations: The role of SPH viscosity (2005)
Dolag, K., Vazza, F., Brunetti, G., Tormen, G.
Smoothed particle hydrodynamics (SPH) employs an artificial viscosity to properly capture hydrodynamical shock waves. In its original formulation, the resulting numerical viscosity is large enough to...
Spectral properties and origin of the radio halo in A3562 (2005)
Giacintucci, S., Venturi, T., Brunetti, G., Bardelli, S., Dallacasa, D., Ettori, S., ...
We present a new detailed multiband study of the merging cluster A3562, in the core of the Shapley Concentration Supercluster. We analyzed new, low frequency radio data performed at 240 MHz, 332 MHz...
Virtual conceptual design of mechanisms (2005)
Brunetti, G., Schneider, P., Prabhu, P., Schmidt, C., Stork, A.
The paper introduces an approach towards modeling and validation of mechanisms in the conceptual design phase applying virtual reality techniques and kinematics simulation. The presented system...
Feature ontologies for the explicit representation of shape semantics (2005)
CAx systems typically encode the semantics of shapes as so-called parametric features on different levels of abstraction. Here we discuss an approach that combines feature-based parametric modelling...
Shape semantics and content management for industrial design and virtual styling (2005)
Ucelli, G., Amicis, R. De, Conti, G., Brunetti, G., Stork, A.
Multimedia content and 3D models play an important role in many industrial applications. Therefore semantic processing for the purposes of comparing, cataloging and archiving 2D and 3D shapes is a...
Spectral properties and origin of the radio halo in A3562 (2005)
Giacintucci, S., Venturi, T., Brunetti, G., Bardelli, S., Dallacasa, D., Ettori, S., ...
Acquiring, structuring shapes and annotating them with semantics to improve design activities (2005)
Giannini, F., Falcidieno, B., Brunetti, G., Graf, H., Stork, A., ...
Shapes incorporate geometry as well as semantics and can be defined in 2D, 3D or higher dimensions. Geometric models can be structured in such a way that they can provide a relevant framework to...
Bow shock and radio halo in the merging cluster A520 (2004)
Markevitch, M., Govoni, F., Brunetti, G., Jerius, D.
Chandra observations of the merging galaxy cluster A520 reveal a prominent bow shock with M=2.1+0.4-0.3. This is only the second clear example of a substantially supersonic merger shock front in...
The most important evidences for non-thermal phenomena in galaxy clusters comes from the spectacular synchrotron radio emission diffused over Mpc scale observed in a growing number of massive...
Properties and Spectral Behaviour of Cluster Radio Halos (2004)
Feretti, L., Brunetti, G., Giovannini, G., Kassim, N., Orru', E., Setti, G.
Several arguments have been presented in the literature to support the connection between radio halos and cluster mergers. The spectral index distributions of the halos in A665 and A2163 provide a...
Anisotropic inverse Compton emission in the radio galaxy 3C 265 (2004)
Bondi, M., Brunetti, G., Comastri, A., Setti, G.
We present the results from a Chandra observation of the powerful radio galaxy 3C 265. We detect X-ray emission from the nucleus, the radio hotspots and lobes. In particular, the lobe X-ray emission...
Radio halos in merging clusters of galaxies (2004)
Giacintucci, S., Venturi, T., Bardelli, S., Brunetti, G., Dallacasa, D., Rao, P., ...
We present the preliminary results of 235 MHz, 327 MHz and 610 MHz observations of the galaxy cluster A3562 in the core of the Shapley Concentration. The purpose of these observations, carried out...
Cluster Mergers, Radio Halos and Hard X-ray Tails: A Statistical Magneto-Turbulent Model (2004)
There is now firm evidence that the ICM consists of a mixture of hot plasma, magnetic fields and relativistic particles. The most important evidences for non-thermal phenomena in galaxy clusters...
Spectral index maps of the radio halos in Abell 665 and Abell 2163 (2004)
Feretti, L., Orru', E., Brunetti, G., Giovannini, G., Kassim, N., Setti, G.
New radio data at 330 MHz are presented for the rich clusters Abell 665 and Abell 2163, whose radio emission is characterized by the presence of a radio halo. These images allowed us to derive the...
Stroke-input methods for immersive styling environments (2004)
Fleisch, T., Brunetti, G., Santos, P., Stork, A.
This paper introduces an immersive styling environment, which aims at closing the gap between 2D drawing and 3D modeling in the design process. The main goal of the styling system is to provide the...
Multiwavelength view of merging clusters (2004)
Bardelli, S., Giacintucci, S., Zucca, E., Venturi, T., Brunetti, G., Ettori, S., ...
INToIND: Initiative for Research, Demonstration, and Training in Virtual Rehabilitation (2004)
Piccini, P., Brunetti, G., Turrisi, M., Spampitano, R.
The initative INToIND "Innovative Technologies for Inclusion Disabilities" connects several key issues to develop and demonstrate the use of cost-effecitve interactive Virtual Worlds, to help...
Brunetti, G., Prieto, M. A., Varano, S.
We discuss, in terms of particle acceleration, the results from optical VLT observations of hot spots associated with radio galaxies. On the basis of observational and theoretical grounds, it is...
Inverse Compton X-rays from the radio galaxy 3C 219 (2003)
Comastri, A., Brunetti, G., Dallacasa, D., Bondi, M., Pedani, M., Setti, G.
We report the results from a Chandra observation of the powerful nearby (z=0.1744) radio galaxy 3C 219. We find evidence for non-thermal X-ray emission from the radio lobes which fits fairly well...
The radio halo in the merging cluster A3562 (2003)
Venturi, T., Bardelli, S., Dallacasa, D., Brunetti, G., Giacintucci, S., Hunstead, R. W., ...
we present new VLA observations at 1.4 GHz confirming the presence of a radio halo at the centre of the cluster A3562, in the core of the Shapley Concentration. We also report a detailed...
Brunetti, G., Prieto, M. Almudena, Varano, S.
We discuss, in terms of particle acceleration, the results from optical VLT observations of hot spots associated with radio galaxies. On the basis of observational and theoretical grounds, the...
Resolving optical hot spots in radio galaxies with the VLT (2003)
Prieto, M. Almudena, Brunetti, G.
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Interaktive Analyse kinematischer Mechanismen in virtuellen Umgebungen (2003)
Brunetti, G., Prabhu, P., Mihalic, L.
The article introduces an approach towards real-time, intuitive kinematics simulation in virtual environments, which extends the current state-of-the-art in virtual assembling. The objective is to...
Feature-based Virtual Engineering (2003)
In this paper the concept of Feature-based Virtual Engineering is presented as an approach to the integrated product development. The focus of the paper is on presenting the current state of our...
Modelling the non-thermal emission from galaxy clusters (2002)
We discuss the relevant processes for the relativistic electrons in the ICM and the possible mechanisms responsible for the production of these electrons. We focus on the origin of the radio halos...
Chandra detects inverse Compton emission from the radio galaxy 3C 219 (2002)
Brunetti, G., Comastri, A., Dallacasa, D., Bondi, M., Pedani, M., Setti, G.
We report the results from a {\it Chandra} observation of the powerful nearby (z=0.1744) radio galaxy 3C 219. We find evidence for non--thermal X-ray emission from the radio lobes which fits fairly...
New perspective for technological co-operation among R&D centres and enterprises: CETA-RS (2002)
Geler, E., Liberali Campana, F., Lourdes Dias Lay, M. De, Brunetti, G.
The CETA-RS (Centre of Excellence in Advanced Technologies of Rio Grande do Sul) is a joint effort between the State of Rio Grande do Sul (RS) and the Fraunhofer Society to set up an institution for...
Using virtual reality to support configuration of assembly (2002)
Georg, A., Runde, C., Brunetti, G.
Running an assembly process depends on various parameters such as material flow, information flow, life-cycle of services and environmental conditions within assembly units. The parametrization...
Rix, J., Brunetti, G., Karle, L.B., Kohlhammer, J.
The main idea for this project was created in the forum of the German American Academic Council (GAAC). A requirements report defines the needs in technology development and technology transfer....
A methodology supporting the preparation of 3D-CAD data for design reviews in VR (2002)
Graf, H., Brunetti, G., Stork, A.
In recent years a range of different VR applications have been developed for the purposes of design review and analysis. The typical data source for a design review of complex models using VR...
CAD2VR or how to efficiently integrate VR into the product development process (2002)
Graf, H., Brunetti, G., Stork, A.
Immersive real-time visualisation of complex product models has become widely used for design review within the engineering domain. In recent years a range of different VR applications have been...
Chandra Detection of the Radio and Optical Double Hot Spot of 3c 351 (2001)
Brunetti, G., Bondi, M., Comastri, A., Pedani, M., Varano, S., Setti, G., ...
Brunetti, G., Bondi, M., Comastri, A., Setti, G.
We report on the {\it Chandra} discovery of large scale non--thermal emission features in the double lobed SSRL quasar 3C 207 (z=0.684). These are: a diffuse emission well correlated with the western...
Chandra detection of the radio and optical double hot spot of 3C 351 (2001)
Brunetti, G., Bondi, M., Comastri, A., Pedani, M., Varano, S., Setti, G., ...
In this letter we report a Chandra X-ray detection of the double northern hot spot of the radio quasar 3C 351. The hot spot has also been observed in the optical with the Hubble Space Telescope...
Hard X-ray emission from the galaxy cluster A3667 (2001)
Fusco-Femiano, R., Fiume, D. Dal, Orlandini, M., Brunetti, G., Feretti, L., Giovannini, G.
We report the results of a long BeppoSAX observation of Abell 3667, one of the most spectacular galaxy cluster in the southern sky. A clear detection of hard X-ray radiation up to ~ 35 keV is...
Anisotropic inverse Compton scattering in powerful radio galaxies: the case of 3C 295 (2001)
Brunetti, G., Cappi, M., Setti, G., Feretti, L., Harris, D. E.
Inverse Compton (IC) scattering of nuclear photons with relativistic electrons in the lobes of powerful radio galaxies and quasars can give detectable extended X-ray emission from the radio lobes if...
Feature-based Virtual Engineering (2001)
In this paper the concept of Feature-based Virtual Engineering is presented as an approach to the integrated product development. The focus of the paper is on presenting the current state of our...
STEP - Datenaustausch Feature-basierter parametrischer Modelle (2001)
Studien und die Praxis vieler Ingenieure belegen, dass gerade in der Automobilindustrie bis zu 80 % der Konstruktionen Varianten existierender Lösungen sind. Trotzdem ist es noch nicht möglich, die...
Brunetti, G., Setti, G., Feretti, L., Giovannini, G.
We calculate the energy distribution of the relativistic particles injected in the ICM during a phase of reacceleration of the relativistic particles in the cluster volume. We apply our results to...
Anisotropic inverse Compton scattering in radio galaxies and particle energy distribution (2000)
In this talk we briefly review the inverse Compton (IC) scattering of nuclear photons in the lobes of radio galaxies and quasars. We concentrate on the possibility to test this model with the Chandra...
Non thermal emission from galaxy clusters: radio halos (2000)
Feretti, L., Brunetti, G., Giovannini, G., Govoni, F., Setti, G.
The number of diffuse radio halos in clusters of galaxies has grown in recent years, making it possible to derive statistical properties of these sources and of the hosting clusters. We show that...
Particle reacceleration in Coma cluster: radio properties and hard X-ray emission (2000)
Brunetti, G., Setti, G., Feretti, L., Giovannini, G.
The radio spectral index map of the Coma halo shows a progressive steepening of the spectral index with increasing radius. Such a steepening cannot be simply justified by models involving continuous...
Extended X-ray emission from FRIIs and RL quasars (2000)
Setti, G., Brunetti, G., Comastri, A.
We review the evidence that detectable fluxes of X-rays are produced by inverse Compton scattering of nuclear photons with the relativistic electrons in the radio lobes of strong FRII radio galaxies...
Due to the highly complex and informal data that has to be managed in the conceptual design this early design phase still lacks of suitable computer support. Furthermore, existing approaches towards...
Virtual Reality Techniques Supporting the Product and Process Development (2000)
Brunetti, G., Graf, H., Alves Dos Santos, L.M.
Information technology is more and more used in the product and process development. Especially virtual reality techniques are supporting the man/machine interaction as well as the dialog among the...
The Role of Product Data Technology in the Integration of PDM/CAD with Virtual Reality (2000)
Brunetti, G., Benölken, P., Rix, J.
Virtual reality is the technology for real time visualization of product data within an immersive environment that offers users an intuitive interaction with the model. In the context of virtual...
The problem of the anisotropic Inverse Compton scattering between a monochromatic photon beam and relativistic electrons is revisited and formally solved without approximations. Solutions are given...
Particle reacceleration in the Coma cluster and the radio, EUV and hard X-ray emissions (1999)
Brunetti, G., Feretti, L., Giovannini, G., Setti, G.
The radio spectral index map of the Coma halo shows a progressive steepening of the spectral index with increasing radius. Such a steepening cannot be simply justified by models involving continuous...
X-ray emission from FRII's radio lobes and the relativistic particle content (1999)
Setti, G., Brunetti, G., Comastri, A.
It is pointed out that copius X-rays from the lobes of FRII radio galaxies are expected as a natural consequence of the unification linking FRIIs and radio-loud quasars. The detection of extended...
The contribution of AGN to the X-ray background: the effect of iron features (1999)
Gilli, R., Comastri, A., Brunetti, G., Setti, G.
The contribution of the iron emission line, commonly detected in the X-ray spectra of Seyfert (Sey) galaxies, to the cosmic X-ray background (XRB) spectrum is evaluated in the framework of the XRB...
Virtual Engineering and Using Virtual Reality for Engineering (1999)
Brunetti, G., Amicis, R. De, Rix, J.
This contribution deals with the application concept of Virtual Engineering (VE), i.e. the application of virtual engineering and communication technology in the product development process....
Towards a Feature-based Conceptual Design (1999)
Brunetti, G., Jezernik, A., Golob, B.
Due to highly informal data, which is hard to maintain, the conceptual phase of the design process still lack of computer support. Also, product data management in this phase is weak. This paper...
Evidence for inverse Compton emission in the powerful radio galaxy 3C 219 (1998)
Brunetti, G., Comastri, A., Setti, G., Feretti, L.
Spectral analysis of ROSAT PSPC and ASCA archive data and a recent ROSAT HRI observation of the powerful FRII radio galaxy 3C 219 reveal an absorbed point-like source, coincident with the nucleus,...
Product-centred Intuitive 3D Interaction for Feature-based Parametric Assembly Modelling (1998)
Feature-based parametric assembly modelling is an approach to part and assembly modelling in CAD that integrates the advantages of feature-based modelling and parametric modelling. Hence, it allows...
Inverse Compton X-rays from strong FRII radio-galaxies (1997)
Brunetti, G., Setti, G., Comastri, A.
In the framework of the quasar-radio galaxies unification the radio emitting lobes of FRII radio galaxies are pervaded by an intense quasar radiation field.Inverse Compton (IC) scattering between the...
Towards a representation scheme for feature-based parametric assembly modelling (1997)
Brunetti, G., Scharr, J., Mueller, U.
Feature-based parametric assembly modelling (FbPAM) is an approach to assembly modelling in CAD/CAM that integrates the advantages of features-based modelling and parametric modelling. The...
Representation Scheme for Feature-based Parametric Design (1997)
Feature-based parametric design (FbPD) is an approach to CAD that integrates the advantages of design-by-features and parametric design. The realization of FbPD systems reqires an appropriate...
Neues aus dem Bereich der Feature-Technologie II (1997)
Brunetti, G., Rix, J., Mueller, U.
Dieser Beitrag ist der zweite in einer Reihe von Artikeln, der die Ergebnisse von FEMEX den Anwendern nd Entwicklern von CAx-Systemen bekannt machen soll.FEMEX (FEature Modeling EXperts) ist ein...
A Proposal for a Feature Description Language (1996)
Brunetti, G., Ovtcharova, J., Vieira, A.S.
To overcome current limitations in capturing user-defined-semantics in a featrue-based model a descrition language is needed, which supports both an automatic and a manual generation of feature...
Modeling shape and semantics through an intermediate model (1996)
Elter, H., Brunetti, G., Martino, T. De, Falcidieno, B.
The idea that many important design tasks and industrial applications could be performed with the help of CAD systms has led to the development of several geometric modeling techniques. Recently,...
Intuitive semantically constrained interaction in feature-based parametric design (1996)
Stork, A., Brunetti, G., Vieira, A.S.
Feature-based parametric design (FbPD) is currently one of the most discussed advanced modelling techniques in CAD. Its basic idea is to enable the user to model in a higher level of abstraction,...
A relational model for interactive manipulation of form features based on algebraic geometry (1995)
Brunetti, G., Martino, T. De, Falcidieno, B., Hassinger, S.
One of the main problems in feature-based modeling is to represent and to handel the feature semantics as well as the geometric and topological information. In this paper an algebraic representation...