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2011 Conference object Unknown

A multi-sensor network for the protection of cultural heritage
Grammalidis N., Cetin E., Dimitropoulos K., Tsalakanidou F., Kose K., Gunay O., Governeur B., Torri D., Kuruoglu E. E., Tozzi S., Benazza A., Chaabane F., Kosucu B., Ersoy C.
The paper presents a novel automatic early warning system to remotely monitor areas of archaeological and cultural interest from the risk of fire. Since these areas have been treasured and tended for very long periods of time, they are usually surrounded by old and valuable vegetation or situated close to forest regions, which exposes them to an increased risk of fire. The proposed system takes advantage of recent advances in multi-sensor surveillance technologies, using optical and infrared cameras, wireless sensor networks capable of monitoring different modalities (e.g. temperature and humidity) as well as local weather stations on the deployment site. The signals collected from these sensors are transmitted to a monitoring centre, which employs intelligent computer vision and pattern recognition algorithms as well as data fusion techniques to automatically analyze sensor information. The system is capable of generating automatic warning signals for local authorities whenever a dangerous situation arises, as well as estimating the propagation of the fire based on the fuel model of the area and other important parameters such as wind speed, slope, and aspect of the ground surface.Source: 19th European Signal Processing Conference, EUSIPCO 2011, pp. 889–893, Barcelona, Spain, 29 August - 2 September 2011
Project(s): FIRESENSE via OpenAIRE

See at: CNR People | www.eusipco2011.org


2011 Other Unknown

Collisions
Tarabella L.
Collisions is a music project born in 2010 from the meeting of two opposite sound sources: the digital technology of Leonello Tarabella and the organic drumming of Alessandro Baris. The result is a musical dialogue of structure and improvisation, jazz and rock, ambient and contemporary, yet with it's own artistic identity led by Tarabella's interactive performance of using his bare hands to manipulate a unique sound technology developed in his computer music research.

See at: CNR People | www.collisionsmusic.com


2011 Part of book or chapter of book Unknown

Surface growth processes induced by AFM debris production. A new observable for nanowear.
D'Acunto, Mario
Loss of material due to abrasion, adhesion, erosion or other types of wear mechanisms is a fundamental phenomenon occurring between two surfaces in relative motion on each other. Generally, in a wide range of length scales, from macroscale down to nanoscale, wear is quantified by measuring the volume loss after a wear test, and the quantification of the wear volume is the main observable to be measured in a wear test. In this chapter, we present some recent results showing that in precise experimental conditions, as ultrahigh vacuum (UHV) environments, surface growth processes induced by atomic force microscopy (AFM) tip sample abrasion can be estimated to have an accurate knowledge of atomic and molecular onset mechanisms involving the occurrence of wear mechanisms, mainly abrasion. In fact, recent UHV scratching AFM experiments made on ionic crystals showed the formation of small clusters, larger aggregates or regular patterns on the surface being scanned, and a theory capable of capturing the basic mechanisms producing the formation of such structures has been proposed. Such cluster structures, generally self-organised in regular structures, are mainly produced by the flux of adatoms generated by the AFM tip stripping off adatoms during the continuous passage of the probe tip on the surface being analysed. In UHV environments, surface diffusion is the dominant mass transport mechanism, and a non-equilibrium thermodynamic framework for the self-organised growth process has been developed demonstrating that the surface growth processes maintain a sort of coherence with respect to the flux rates of the adatomic debris induced by the AFM tip during the wear test making the wearing and the surface growth specular. As a consequence, the physical nature of the growth processes induced by AFM debris could represent a new observable to be measured for a new and accurate comprehension of wear mechanisms on nanoscale.Source: Scanning Probe Microscopy in Nanoscience and Nanotechnology 2, edited by Bharat Bhushan, pp. 505–531. Berlin: Springer, 2011
DOI: 10.1007/978-3-642-10497-8_17

See at: DOI Resolver | link.springer.com | CNR People


2011 Article Unknown

Good manufacturing practices-grade preformed ossicular prostheses from banked bone via computer numerically controlled micromilling
Stefano Berrettini, Luca Bruschini, Cesare Stefanini, Delfo D'Alessandro, Mario D'Acunto, Serena Danti
Objectives: The aim of this study was the fabrication of ossicular replacement prostheses (ORPs) from decellularized banked cortical bone via computer numerically controlled (CNC) ultraprecision micromilling, in order to obtain preformed clinical-grade tissue products, reproducing shape, size, and details perfectly comparable to those of synthetic devices. Methods: Banked femoral compact bone was used to fabricate partial and total ORPs via CNC micromilling according to Good Manufacturing Practices procedures. Drawings of ORPs with different shapes and sizes were uploaded to the computer interface, and different surface-finish parameters were tested. The obtained products underwent dimensional, weight, and surface characterizations. A histologic analysis was pursued to compare the bone matrix compactness of the produced ORPs to that of the ear ossicles. Results: Banked-bone ORPs were produced with high dimensional accuracy. Partial ORP weights averaged (+/- SD) 31.2 +/- 0.6 mg, and total ORP weights averaged 69.3 +/- 0.7 mg. The best-finish mode allowed microscale or nanoscale roughness free from machinery textures to be obtained. Finally, the histologic analysis confirmed that the extracellular matrix compactness of the produced ORPs was suitable for ossicular chain replacement. Conclusions: This study assesses the fabrication feasibility of novel banked-bone ORPs of extremely high dimensional accuracy. Such devices are aimed at combining the most favorable aspects of both synthetic (reproducibility, convenience, and biosafety) and biological replacements (total biocompatibility).Source: The Annals of otology, rhinology & laryngology 120 (2011): 9–16. doi:10.1177/000348941112000102
DOI: 10.1177/000348941112000102

See at: DOI Resolver | www.annals.com | CNR People


2011 Article Unknown

Nanovectors for drug delivery: long-lived pore dynamics for swelling liposomes
Mario D'Acunto
A liposome is a spherical, bilayer vesicle separating the interior volume containing an aqueous solution, from an exterior suspension. A fundamental practical application provides the liposome used as vehicles for drug delivery. In this case, liposomes are designed to contain a specific drug or a gene needed to fight the disease. If a vesicle containing high internal solute concentration is placed inside a dilute solution, the osmotic flux of solvent into the interior can lead to its rupture or a formation of pores. Such pores can be long-lived pores or short-lived pores suddenly closing after their formations. Long-lived pores lead to a well controlled drug delivery. In this paper, we show that the existence of long-lived pores is completely conditioned only by the pore dynamics, and that the long-lived pore dynamics is highly stable because sustained by a limit cycle. Moreover, we calculate analytically the frequency of a long-lived pore making use of the He's variational method.Source: Mechanics research communications 38 (2011): 34–37. doi:10.1016/j.mechrescom.2010.11.002
DOI: 10.1016/j.mechrescom.2010.11.002

See at: DOI Resolver | CNR People | www.sciencedirect.com


2011 Article Unknown

Poly(ester urethane) guides for peripheral nerve regeneration
Valeria Chiono, Susanna Sartori, Alfonsina Rechichi, Chiara Tonda-turo, Giovanni Vozzi, Federico Vozzi, Mario D'Acunto, Claudia Salvadori, Francesca Dini, Giovanni Barsotti, Fabio Carlucci, Silvia Burchielli, Silvia Nicolino, Chiara Audisio, Isabelle Perroteau, Paolo Giusti, Gianluca Ciardelli
A biocompatible and elastomeric PU was synthesized from low-molecular-weight PCL as macrodiol, CMD as chain extender and HDI as chain linker for applications in the field of peripheral nerve repair. PU cast films supported in vitro attachment and proliferation of NOBEC. The in vitro adhesion and proliferation of S5Y5 neuroblastoma cells on the inner surface of uncoated, gelatin- and PL-coated PU guides were compared. Due to their superior in vitro performance, PL-coated PU guides were tested in vivo for the repair of 1.8 cm-long defects in rat sciatic nerves. The progressive regeneration was confirmed by EMG and histological analysis showing the presence of regenerating fibers in the distal stumps. Artificial nerve guides are a promising alternative to autografting for peripheral nerve repair. A newly synthesized biocompatible elastomeric poly(ester urethane) containing poly(?-caprolactone) segments was proposed for the realization of nerve guides. PU physicochemical and biological properties were analyzed. Successful nerve regeneration was demonstrated in a rat sciatic nerve model.Source: Macromolecular bioscience (Print) 11 (2011): 245–256. doi:10.1002/mabi.201000354
DOI: 10.1002/mabi.201000354

See at: DOI Resolver | onlinelibrary.wiley.com | CNR People


2011 Article Unknown

Planck early results: the Planck mission
Salerno, E., Ade, P., D'Acqui, L. P.
The European Space Agency's Planck satellite was launched on 14 May 2009, and has been surveying the sky stably and continuously since 13 August 2009. Its performance is well in line with expectations, and it will continue to gather scientific data until the end of its cryogenic lifetime. We give an overview of the history of Planck in its first year of operations, and describe some of the key performance aspects of the satellite. This paper is part of a package submitted in conjunction with Planck's Early Release Compact Source Catalogue, the first data product based on Planck to be released publicly. The package describes the scientific performance of the Planck payload, and presents results on a variety of astrophysical topics related to the sources included in the Catalogue, as well as selected topics on di use emission.Source: Astronomy & astrophysics (Print) 536 (2011). doi:10.1051/0004-6361/201116464
DOI: 10.1051/0004-6361/201116464

See at: DOI Resolver | CNR People


2011 Conference object Unknown

Long range correlations between nucleotide triplets
Vitale D., Kuruoglu E. E., Abul O.
The study of statistical fluctuations in DNA sequences can reveal important characteristics of their organization. Particularly, in the last two decades, several studies have focused on the detection of Long Range Correlations (LRC) in DNA sequences, and on the study of particular long range dependence properties of nucleotides. Since protein coding is carried out by codons (nucleotide triplets), we conduct LRD analysis to see whether there is a long range dependence among nucleotide triplets. Our interest is not limited to auto correlations of single codons, but also extends to cross correlations over all possible pairs of nucleotide triplets. The analysis on nucleotide triplets reveal LRCs for the human Chromosomes 20 and 21. Moreover, some triplets that contain only nucleotides Adenine and Thymine are seen to exhibit correlation significantly higher than others.Source: 6th International Symposium on Health Informatics and Bioinformatics, HIBIT 2011, pp. 241–244, Izmir, Turchia, 2-5 May 2011

See at: CNR People


2011 Article Open Access OPEN

Superimposed event detection by particle filters
Urfalioglu O., Kuruoglu E. E., Cetin E. A.
In this study, the authors consider online detection and separation of superimposed events by applying particle filtering. They observe only a single-channel superimposed signal, which consists of a background signal and one or more event signals in the discrete-time domain. It is assumed that the signals are statistically independent and can be described by random processes with known parametric models. The activation and deactivation times of event signals are assumed to be unknown. This problem can be described as a jump Markov system (JMS) in which all signals are estimated simultaneously. In a JMS, states contain additional parameters to identify models. However, for superimposed event detection, the authors show that the underlying JMS-based particle-filtering method can be reduced to a standard Markov chain method without additional parameters. Numerical experiments using real-world sound processing data demonstrate the effectiveness of their approach.Source: IET signal processing (Print) 5 (2011): 662–668. doi:10.1049/iet-spr.2010.0022
DOI: 10.1049/iet-spr.2010.0022
Project(s): FIRESENSE via OpenAIRE

See at: Bilkent University Institutional Repository Open Access | Bilkent University Institutional Repository Open Access | Unknown Repository Restricted | DOI Resolver | CNR People


2011 Article Unknown

Alpha-stable channel capacity
Wang J., Kuruoglu E. E., Zhou T.
Alpha-stable distributions have found various applications in the literature especially in modelling impulsive noise in communications channels. Despite various schemes for receiver design under alpha-stable noise, the channel coding problem has not been addressed yet. In this letter, we develop the channel capacity for the alpha-stable channels both for the symmetric and the skewed cases and provide numerical bounds for its lossy coding performance. Blahut-Arimoto algorithm is used to calculate the capacity of alpha-stable channel and its efficiency is demonstrated.Source: IEEE communications letters (Print) 5 (2011): 1107–1109. doi:10.1109/LCOMM.2011.081011.110813
DOI: 10.1109/LCOMM.2011.081011.110813

See at: DOI Resolver | CNR People


2011 Article Unknown

A deterministic algorithm for optical flow estimation
Gerace I., Martinelli F., Pucci P.
In this paper we propose a new deterministic algorithm for determining optical flow through regularization techniques so that the solution of the problem is defined as the minimum of an appropriate energy function. We also assume that the displacements are piecewise continuous and that the discontinuities are variable to be estimated. More precisely, we introduce a hierarchical three-step optimization strategy to minimize the constructed energy function, which is not convex. In the first step we find a suitable initial guess of the displacements field by a gradient-based GNC algorithm. In the second step we define the local energy of a displacement field as the energy function obtained by fixing all the field with the exception of a row or of a column. Then, through an application of the shortest path technique we minimize iteratively each local energy function restricted to a row or to a column until we arrive at a fixed point. In the last step we use again a GNC algorithm to recover a sub-pixel accuracy. The experimental results confirm the goodness of this technique.Source: Comunications in Applied and Industrial Mathematics 1 (2011): 249–268. doi:10.1685/2010CAIM584
DOI: 10.1685/2010CAIM584

See at: caim.simai.eu | DOI Resolver | CNR People


2011 Article Unknown

Time varying dynamic bayesian network for nonstationary events modeling and online inference
Zhaowen Wang, Ercan E. Kuruoglu, Xiaokang Yang, Yi Xu, Thomas S. Huang
This paper presents a novel time varying dynamic Bayesian network (TVDBN) model for the analysis of nonstationary sequences which are of interest in many fields. The changing network structure and parameter in TVDBN are treated as random processes whose values at each time epoch determine a stationary DBN model; this DBN model is then used to specify the distribution of data sequence at the time epoch. Under such a hierarchical formulation, the changing state of network can be incorporated into the Bayesian framework straightforwardly. The network state is assumed to transit smoothly in the joint space of numerical parameter and graphical topology so that we can achieve robust online network learning even without abundant observations. Particle filtering is employed to dynamically update current network state as well as infer hidden data values. We implement our time varying model for data sequences of multinomial and Gaussian distributions, while the general model framework can be used for any other distribution. Simulations on synthetic data and evaluations on video sequences both demonstrate that the proposed TVDBN is effective in modeling nonstationary sequences. Comprehensive comparisons have been made against existing nonstationary models, and our proposed model is shown to be the top performer.Source: IEEE transactions on signal processing 59 (2011): 1553–1568. doi:10.1109/TSP.2010.2103071
DOI: 10.1109/TSP.2010.2103071

See at: DOI Resolver | ieeexplore.ieee.org | CNR People


2011 Article Open Access OPEN

Visual sensor networks for infomobility
Magrini M., Moroni D., Nastasi C., Pagano P., Petracca M., Pieri G., Salvadori C., Salvetti O.
The wide availability of embedded sensor platforms and low-cost cameras-together with the developments in wireless communication-make it now possible the conception of pervasive intelligent systems based on vision. Such systems may be understood as distributed and collaborative sensor networks, able to produce, aggregate and process images in order to understand the observed scene and communicate the relevant information found about it. In this paper, we investigate the peculiarities of visual sensor networks with respect to standard vision systems and we identify possible strategies to accomplish image processing and analysis tasks over them. Although the rather strong constraints in computational and transmission power of embedded platforms that may prevent the use of state of the art computer vision and pattern recognition methods, we argue that multi-node processing methods may be envisaged to decompose a complex task into a hierarchy of computationally simpler problems to be solved over the nodes of the network. These ideas are illustrated by describing an application of visual sensor network to infomobility. In particular, we consider an experimental setting in which several views of a parking lot are acquired by the sensor nodes in the network. By integrating the various views, the network is capable to provide a description of the scene in terms of the available spaces in the parking lot.Source: Pattern recognition and image analysis 21 (2011): 20–29. doi:10.1134/S1054661811010093
DOI: 10.1134/S1054661811010093
Project(s): ARTISTDESIGN via OpenAIRE

See at: ZENODO Open Access | Unknown Repository Restricted | DOI Resolver | link.springer.com | CNR People


2011 Article Unknown

Attaching semantics to document images safeguards our cultural heritage
Console E., Tonazzini A., Bruno F.
Extracting and archiving information from digital images of documents is one of the goals of the project AMMIRA (multispectral acquisition, enhancing, indexing and retrieval of artifacts), led by Tea- Sas, a service firm based in Catanzaro, Italy, with the collaboration of two Italian research teams, the Institute of Information Science and Technologies of CNR in Pisa, and the Department of Mechanical Engineering of the University of Calabria in Cosenza. AMMIRA is supported by European funding, through the Italian regional program for integrated support to enterprises.Source: ERCIM news 86 (2011): 19–20.

See at: ercim-news.ercim.eu | CNR People


2011 Article Unknown

Attività costitutiva e conoscenza
Renzo Beltrame
L'intervento espone alcune conseguenze della distinzione tra descrizione del mentale come un'attività costitutiva considerata nel suo farsi, e sua descrizione come un'attività svolta, un punto di vista, quest'ultimo, che può venir usato per le conoscenze dato il loro carattere di ripetizioni.Source: Methodologia online 242 (2011): 1–7.

See at: CNR People | www.methodologia.it


2011 Article Unknown

Le operazioni percettive (1970) - Riflessioni critiche
Renzo Beltrame
Considerazioni critiche ad un approccio alla percezione visiva nel quadro dell'indirizzo di studi sull'attività mentale della Scuola Operativa Italiana.Source: Methodologia online 245 (2011).

See at: CNR People | www.methodologia.it


2011 Article Unknown

Le operazioni percettive
Renzo Beltrame
Ripresa di un precedente lavoro che descrive un approccio alla percezione visiva nell'ambito degli studi sull'attività mentale della Scuola Operativa Italiana.Source: Methodologia online 244 (2011): 1–16.

See at: CNR People | www.methodologia.it


2011 Conference object Unknown

THESAURUS: techniques for underwater exploration and archeology through swarms of autonomous vehicles
Allotta Benedetto, Caiti Andrea, Cocco Michele, Daviddi Walter, Gualdesi Lavinio, La Monica Denise, Moroni Davide, Pieri Gabriele, Salvetti Ovidio, Tampucci Marco
The THESAURUS project (2011-2013) is financed by Regione Toscana (Italy) in the framework of the "FAS" program 2007-2013 under Deliberation CIPE (Italian government) 166/2007. The overall goal of THESAURUS project is to develop multidisciplinary methodologies and technologies to detect, catalogue and document underwater artifacts and wreckage with archaeological and ethno-anthropological value. In particular, specially designed Autonomous Underwater Vehicles (AUVs) will be used to systematically explore the sea floor in a co-operative way, by collecting and analyzing in real time heterogeneous data from acoustic, optical and magnetic sensors with the aim of promptly detecting objects of interest. Data recorded from AUVs missions will also be analyzed and integrated off-line, by building large-scale sea-floor maps and 3D reconstructions for granting virtual access to underwater sites.Source: The 12th International Symposium on Virtual Reality, Archaeology and Cultural Heritage, VAST 2011, pp. 13–16, Prato, 18-21 October 2011

See at: CNR People


2011 Conference object Unknown

Determinazione della risposta di piatti di batteria smorzati mediante metodi numerici
Genuini G., Raffaelli F., Bertini G.
RESPONSE DETERMINATION OF DAMPED BATTERY PLATES BY NUMERICAL METHODS Abstract In order to simulate the behaviour of musical instruments it has recently been identified and implemented some appropriate physical models, rather than traditional synthesis formula. Physical models were usually applied to string instruments and wind instruments. In both cases it is possible carrying out the calculations by analytical mode, due to the simplicity of the equations that governs the phenomenon. In the case of a battery plate, here considered, we must apply numerical methods. In the present paper an analysis on the numerical response of a particular battery plate to numerical pulses is presented. Our finite elements model also consider the internal damping effects. Some performance evaluations and future developments of the method is finally reported.Source: 38° Convegno Nazionale dell'Associazione Italiana di Acustica, AIA 2011, Rimini, 8-10 Giugno 2011

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2011 Conference object Unknown

Long range cross correlations between nucleotide triplets in human chromosomes
Vitale Davide, Kuruoglu Ercan Engin, Abul Osman
Long range autocorrelations of nucleotide pairs in human chromosomes have been studied widely in the literature. Long-range correlations differ from usual correlations in that they indicate underlying fractal nature. Despite the wide spread acceptance of this observation for nucleotide pairs, its biological significance has not been completely explored. Motivated by the fact that the basic unit for aminoacid synthesis are codons, composed of three nucleotides, in this paper, we calculate the correlations between pairs of nucleotide triplets. We utilise an approximation to the mutual information function suggested by Beier, which is approximately equal to correlation. We underline that we do not consider only autocorrelations but also crosscorrelations. We study the human choromosomes 22 and 23. We demonstrate that among 4096 such triplet pairs, 23 show long range dependence. Considering a Gaussian distribution for the crosscorrelation of such pairs, these 23 pairs stand out at 3 sigma distance from the mean. The list of these pairs are: AAA-AAT, AAA-ATA, AAA-ATT, AAA-TAA, AAA-TAT, AAA-TTT, AAA-ATA, AAT-ATT, AAT-TAT, AAT-TTT, ATA-ATT, ATA-TAA, ATA-TAT, ATA-TTA, ATA-TTT, ATT-TAA, ATT-TAT, ATT-TTT, TAA-TTT, TAA-TTA, TAT-TTT, TTA-TTT. The biological significance of this result is yet not clear and we believe that this conference would be an ideal platform for discussion on the interpretation of these observations.Source: Bioinformatics Italian Society VIII Annual Meeting, BITS 2011, pp. 159–159, Pisa, Italy, 20-22 Giugno 2011

See at: CNR People