2012
Other
Open Access
Software di gestione di sistemi bibliotecari "LIBERO v. 6.2.1"
Giannini S
Il corso, rivolto agli operatori/bibliotecari dell'Università Pontificia Salesiana di Roma e agli operatori/bibliotecari dell'Area della Ricerca CNR di Pisa, ha fornito un'introduzione generale alla nuova versione del sistema di automazione bibliotecaria LIBERO (6.2.1), rinnovata e completamente Web-based. In particolare sono stati introdotti i moduli del sistema, i parametri e la loro gestione. Il corso ha poi approfondito il modulo Cataloguing, i parametri e le funzioni del modulo, spiegando le icone ed il loro significato, illustrando le diverse opzioni di ricerca (di base, avanzata e booleana), le diverse modalità di catalogazione (MARC e Non-MARC, utilizzo delle interfacce di sistema, uso di un template, copia di un record, inserimento manuale, fusione di records), procedure di Import/Export.
Giannini S
Il corso, rivolto agli operatori/bibliotecari dell'Università Pontificia Salesiana di Roma e agli operatori/bibliotecari dell'Area della Ricerca CNR di Pisa, ha fornito un'introduzione generale alla nuova versione del sistema di automazione bibliotecaria LIBERO (6.2.1), rinnovata e completamente Web-based. In particolare sono stati introdotti i moduli del sistema, i parametri e la loro gestione. Il corso ha poi approfondito il modulo Cataloguing, i parametri e le funzioni del modulo, spiegando le icone ed il loro significato, illustrando le diverse opzioni di ricerca (di base, avanzata e booleana), le diverse modalità di catalogazione (MARC e Non-MARC, utilizzo delle interfacce di sistema, uso di un template, copia di un record, inserimento manuale, fusione di records), procedure di Import/Export.
See at:
CNR IRIS 
| ISTI Repository | CNR IRIS 
1993
Conference article
Open Access
A repository based tool for re-engineering towards an object oriented environment
Signore O, Loffredo M
Software re-engineering and object orientation are two areas of growing interest in the last years. However, while many researchers have focused their interest in the object-oriented design methodologies, a little attention has been paid to the re-engineering towards an object-oriented environment. In this paper we examine the motivations towards object-oriented re-engineering (extendibility, robustness and reusability of the code) and the problems found in moving from a process-based to an object oriented perspective. Finally, we describe the architecture of TROOP, a tool that implements the object oriented re-engineering, combining into a single repository information describing both the conventional and the object-oriented target environment
Signore O, Loffredo M
Software re-engineering and object orientation are two areas of growing interest in the last years. However, while many researchers have focused their interest in the object-oriented design methodologies, a little attention has been paid to the re-engineering towards an object-oriented environment. In this paper we examine the motivations towards object-oriented re-engineering (extendibility, robustness and reusability of the code) and the problems found in moving from a process-based to an object oriented perspective. Finally, we describe the architecture of TROOP, a tool that implements the object oriented re-engineering, combining into a single repository information describing both the conventional and the object-oriented target environment
2007
Contribution to journal
Open Access
Series of Workshops on Digital Library Foundations
Castelli D, Fox E
This document presents the results of the workshop on "Foundations of Digital Libraries" held in connection with the ACM-IEEE JCDL 2007 Conference in June in Vancouver. The papers presented during the workshop aimed to contribute to laying the foundations for digital libraries as a whole, as well as continuing the work on the definition of a Reference Model for Digital Libraries that was launched by the EU DELOS Network of Excellence on Digital Libraries.Source: D-LIB MAGAZINE, vol. 13, pp. 9-10
DOI: 10.1045/september2007-castelli
Metrics:
Castelli D, Fox E
This document presents the results of the workshop on "Foundations of Digital Libraries" held in connection with the ACM-IEEE JCDL 2007 Conference in June in Vancouver. The papers presented during the workshop aimed to contribute to laying the foundations for digital libraries as a whole, as well as continuing the work on the definition of a Reference Model for Digital Libraries that was launched by the EU DELOS Network of Excellence on Digital Libraries.Source: D-LIB MAGAZINE, vol. 13, pp. 9-10
DOI: 10.1045/september2007-castelli
Metrics:
See at:
D-Lib Magazine | CNR IRIS | D-Lib Magazine | CNR IRIS
1998
Other
Open Access
Sviluppo di una procedura assistita da calcolatore per la valutazione dello strabismo: studio preliminare
Azzarelli L, Chimenti M, Bozzi E, Bozzi R, Fantini E
Sommario non disponibile.
Azzarelli L, Chimenti M, Bozzi E, Bozzi R, Fantini E
Sommario non disponibile.
2014
Conference article
Open Access
Going beyond research communication and management current practices
Castelli D
This key note presentation discusses the impact of data-driven science in the research "landscape" and describes the functionality of the OpenAIRE infrastructure for research.Project(s): OPENAIREPLUS
Castelli D
This key note presentation discusses the impact of data-driven science in the research "landscape" and describes the functionality of the OpenAIRE infrastructure for research.Project(s): OPENAIREPLUS
See at:
CNR IRIS | www.cris2014.org | CNR IRIS
2014
Conference article
Open Access
Visual media for Cultural Heritage: an opportunity for assessing, finding limitations and enhancing technologies
Scopigno R
Digital technologies are now mature for producing high quality digital replicas of Cultural Heritage (CH) artifacts. The research results produced in the last two decades have shown an impressive evolution and consolidation of the technologies for acquiring high-quality digital 3D models, encompassing both geometry and color (or, better, surface reflectance properties); technologies for the interactive visualisation of complex models and the integration of different media have been also an important subject of research. In this talk, I will present the more recent progresses, focusing on practical solutions which aim at a major impact in real applications. The talk will also try to give a glance into the near future, demonstrating how geometry processing and visualization could become a major instrument in the study and dissemination of our cultural heritage.
Scopigno R
Digital technologies are now mature for producing high quality digital replicas of Cultural Heritage (CH) artifacts. The research results produced in the last two decades have shown an impressive evolution and consolidation of the technologies for acquiring high-quality digital 3D models, encompassing both geometry and color (or, better, surface reflectance properties); technologies for the interactive visualisation of complex models and the integration of different media have been also an important subject of research. In this talk, I will present the more recent progresses, focusing on practical solutions which aim at a major impact in real applications. The talk will also try to give a glance into the near future, demonstrating how geometry processing and visualization could become a major instrument in the study and dissemination of our cultural heritage.
See at:
CNR IRIS | www.cescg.org | CNR IRIS
2014
Journal article
Open Access
Thesaurus: un database per il patrimonio culturale sommerso
La Monica D, Costa S, Pace G, Martinelli M, Salvetti O, Tampucci M, Righi M
Thesaurus Project aims at promoting the knowledge of the underwater cultural heritage, ancient and modern, through the application of several typologies of tools: underwater autonomous vehicles, which will be able to explore the sea bottom in teams communicating with each other; a database, which will be useful to store and manage all the information referring to archaeological or historical objects, shipwrecks and sites. This paper aims to explain the logic structure of the database indicating the particular needs of the research, the different typologies of items which have to be managed (archaeological and historical objects; ancient, medieval or modern shipwrecks; underwater sites; written or figurative sources, etc.), the relation with other similar databases and projects. The main task of this part of Thesaurus is to plan and organize an IT system, which will allow archaeologists to describe information in detail, in order to make an efficient managing and retrieving data system available.Source: ARCHEOLOGIA E CALCOLATORI, vol. 25, pp. 51-69
La Monica D, Costa S, Pace G, Martinelli M, Salvetti O, Tampucci M, Righi M
Thesaurus Project aims at promoting the knowledge of the underwater cultural heritage, ancient and modern, through the application of several typologies of tools: underwater autonomous vehicles, which will be able to explore the sea bottom in teams communicating with each other; a database, which will be useful to store and manage all the information referring to archaeological or historical objects, shipwrecks and sites. This paper aims to explain the logic structure of the database indicating the particular needs of the research, the different typologies of items which have to be managed (archaeological and historical objects; ancient, medieval or modern shipwrecks; underwater sites; written or figurative sources, etc.), the relation with other similar databases and projects. The main task of this part of Thesaurus is to plan and organize an IT system, which will allow archaeologists to describe information in detail, in order to make an efficient managing and retrieving data system available.Source: ARCHEOLOGIA E CALCOLATORI, vol. 25, pp. 51-69
See at:
CNR IRIS | www.progettocaere.rm.cnr.it | CNR IRIS
2015
Conference article
Open Access
Experimenting an embedded-sensor network for early warning of natural risks due to fast failures along railways
Fantini A, Magrini M, Martino S, Moroni D, Pieri G, Prestininzi A, Salvetti O
This paper deals with a project for real-time monitoring of railway tracks to detect events, such as fast failures from natural risks, which may threaten the transit of trains. The paper describes a network of smart sensors for early warning of these endangering events. Three main types of fast-failure events involving railways were identified: sinkhole, rock and debris falls. A case study on a known test site and experimentation with various scenarios were carried out with a view to developing algorithms capable of spotting and localising them. Results demonstrate the good performance of the network in monitoring the investigated events.
Fantini A, Magrini M, Martino S, Moroni D, Pieri G, Prestininzi A, Salvetti O
This paper deals with a project for real-time monitoring of railway tracks to detect events, such as fast failures from natural risks, which may threaten the transit of trains. The paper describes a network of smart sensors for early warning of these endangering events. Three main types of fast-failure events involving railways were identified: sinkhole, rock and debris falls. A case study on a known test site and experimentation with various scenarios were carried out with a view to developing algorithms capable of spotting and localising them. Results demonstrate the good performance of the network in monitoring the investigated events.
See at:
CNR IRIS | ISTI Repository | www.scitepress.org | CNR IRIS | CNR IRIS
2015
Conference article
Open Access
Signal processing for underwater archaeology
Moroni D, Pascali M A, Reggiannini M, Salvetti O
About three million wrecks lie scattered on the oceans' seafloors. This huge patrimony is actually threatened by criminal enterprises having advanced tools available for localization and rescue operations. ARROWS, a currently ongoing EU FP7 project, is an example of the effective commitment between cultural institutions and the scientific community towards the safeguard of the sunken cultural heritage. ARROWS is devoted to advanced technologies and tools for mapping, diagnosing, cleaning, and securing underwater and coastal archaeological sites. A fleet of Autonomous Underwater Vehicles (AUVs) will be manufactured with the purpose of surveying the seabed and sensing the underwater environment by means of proper payload sensors (digital cameras, side scan and multi-beam sonars). This paper describes a set of underwater scene understanding procedures specifically tailored to the purposes addressed in the ARROWS frame. In particular the data collected by the AUVs during the acquisition campaigns will be processed to detect targets of interest located on the seabed. The main approach adopted in the object detection procedures is to highlight the amount of regularity in the captured data. This can be pursued by exploiting computer vision algorithms that perform i) the recognition of geometrical curves ii) the classification of seafloor areas by means of textural pattern analysis iii) a large scale map generation to return an overall view of the site and iv) a reliable object recognition process performing the integration of the available multi modal information. Moreover the collected raw data together with the analysis output results will be stored to allow for an offline deep analysis of the archaeological findings. This will represent a powerful tool to be used by expert users or by the general public to enjoy the underwater cultural heritage.Project(s): ARROWS
Moroni D, Pascali M A, Reggiannini M, Salvetti O
About three million wrecks lie scattered on the oceans' seafloors. This huge patrimony is actually threatened by criminal enterprises having advanced tools available for localization and rescue operations. ARROWS, a currently ongoing EU FP7 project, is an example of the effective commitment between cultural institutions and the scientific community towards the safeguard of the sunken cultural heritage. ARROWS is devoted to advanced technologies and tools for mapping, diagnosing, cleaning, and securing underwater and coastal archaeological sites. A fleet of Autonomous Underwater Vehicles (AUVs) will be manufactured with the purpose of surveying the seabed and sensing the underwater environment by means of proper payload sensors (digital cameras, side scan and multi-beam sonars). This paper describes a set of underwater scene understanding procedures specifically tailored to the purposes addressed in the ARROWS frame. In particular the data collected by the AUVs during the acquisition campaigns will be processed to detect targets of interest located on the seabed. The main approach adopted in the object detection procedures is to highlight the amount of regularity in the captured data. This can be pursued by exploiting computer vision algorithms that perform i) the recognition of geometrical curves ii) the classification of seafloor areas by means of textural pattern analysis iii) a large scale map generation to return an overall view of the site and iv) a reliable object recognition process performing the integration of the available multi modal information. Moreover the collected raw data together with the analysis output results will be stored to allow for an offline deep analysis of the archaeological findings. This will represent a powerful tool to be used by expert users or by the general public to enjoy the underwater cultural heritage.Project(s): ARROWS
See at:
CNR IRIS | ISTI Repository | www.scitepress.org | CNR IRIS | CNR IRIS
2015
Conference article
Open Access
PRIAR using a graph segmentation method
Righi M, D'Acunto M, Salvetti O
Recently, we have suggested a simple and general-purpose method able to combine high-resolution analysis with the classification and identification of components of microscopy imaging. The method named PRIAR (Pattern Recognition Image Augumented Resolution) is a tool developed by the authors that gives the possibility to enhance spatial and photometric resolution of low-res images. The implemented algorithm follows the scheme: 1) image classification; 2) blind super-resolution on single frame; 3) pattern-analysis; 4) reconstruction of the discovered pattern. In this paper, we suggest some improvements of the PRIAR algorithm, in particular, the definition of a segmentation method which is based on homomorphism between a processed image and a graph describing the image itself, able to identify object of interest in complex patterns. The case study is the identification of organs inside biological cells acquired with Atomic Force Microscopy Technique.
Righi M, D'Acunto M, Salvetti O
Recently, we have suggested a simple and general-purpose method able to combine high-resolution analysis with the classification and identification of components of microscopy imaging. The method named PRIAR (Pattern Recognition Image Augumented Resolution) is a tool developed by the authors that gives the possibility to enhance spatial and photometric resolution of low-res images. The implemented algorithm follows the scheme: 1) image classification; 2) blind super-resolution on single frame; 3) pattern-analysis; 4) reconstruction of the discovered pattern. In this paper, we suggest some improvements of the PRIAR algorithm, in particular, the definition of a segmentation method which is based on homomorphism between a processed image and a graph describing the image itself, able to identify object of interest in complex patterns. The case study is the identification of organs inside biological cells acquired with Atomic Force Microscopy Technique.
See at:
CNR IRIS | ISTI Repository | www.scitepress.org | CNR IRIS | CNR IRIS
2015
Contribution to book
Open Access
From EU projects to a family of model checkers. From Kandinsky to KandISTI
Ter Beek M H, Gnesi S, Mazzanti F
We describe the development of the KandISTI family of model checkers from its origins nearly two decades ago until its very recent latest addition. Most progress was made, however, during two integrated European projects, AGILE and SENSORIA, in which our FM&&T lab participated under the scientific coordination of Martin Wirsing. Moreover, the very name of the family of model checkers is partly due to Martin Wirsing's passion for art and science.DOI: 10.1007/978-3-319-15545-6_20
Metrics:
Ter Beek M H, Gnesi S, Mazzanti F
We describe the development of the KandISTI family of model checkers from its origins nearly two decades ago until its very recent latest addition. Most progress was made, however, during two integrated European projects, AGILE and SENSORIA, in which our FM&&T lab participated under the scientific coordination of Martin Wirsing. Moreover, the very name of the family of model checkers is partly due to Martin Wirsing's passion for art and science.DOI: 10.1007/978-3-319-15545-6_20
Metrics:
See at:
CNR IRIS | link.springer.com | ISTI Repository | doi.org | CNR IRIS | CNR IRIS
2019
Other
Open Access
Le radiazioni
Martinelli M, Bastiani L, Paolicchi F
Una introduzione alle radiazioni - Materiale per Bright 2019
Martinelli M, Bastiani L, Paolicchi F
Una introduzione alle radiazioni - Materiale per Bright 2019
See at:
CNR IRIS | ISTI Repository | CNR IRIS
2019
Contribution to conference
Open Access
Lo Stile di Vita del Frequentatore della Montagna
Martinelli M, Bastiani L, Valoti P, Agazzi G, Carrara B, Parigi Gb, Marina Malannino M, Spinelli A, Calderoli A, Orizio L, Righi M, Pardini F, Benassi A, D'Angelo G, Giardini G, Moroni D, Mrakic Sposta S, Pratali L
La variazione dei frequentatori della montagna degli ultimi anni sta significativamente cambiando le problematiche del territorio montano: se da un lato aumenta il numero delle presenze temporanee (turisti, lavoratori, etc...), dall'altro diminuisce quello degli abitanti. Il primo, tra le varie, sta elevando il Male Acuto di alta Montagna (MAM) a problema di salute pubblica non trascurabile; il secondo porta ad una minore gestione del territorio generando problemi diretti ed indiretti, tra questi, favorito altresì dal riscaldamento globale, anche la proliferazione delle zecche. Questa ricerca ha esaminato in particolare I fattori di rischio individuale relativo allo stile di vita e al MAM.
Martinelli M, Bastiani L, Valoti P, Agazzi G, Carrara B, Parigi Gb, Marina Malannino M, Spinelli A, Calderoli A, Orizio L, Righi M, Pardini F, Benassi A, D'Angelo G, Giardini G, Moroni D, Mrakic Sposta S, Pratali L
La variazione dei frequentatori della montagna degli ultimi anni sta significativamente cambiando le problematiche del territorio montano: se da un lato aumenta il numero delle presenze temporanee (turisti, lavoratori, etc...), dall'altro diminuisce quello degli abitanti. Il primo, tra le varie, sta elevando il Male Acuto di alta Montagna (MAM) a problema di salute pubblica non trascurabile; il secondo porta ad una minore gestione del territorio generando problemi diretti ed indiretti, tra questi, favorito altresì dal riscaldamento globale, anche la proliferazione delle zecche. Questa ricerca ha esaminato in particolare I fattori di rischio individuale relativo allo stile di vita e al MAM.
See at:
CNR IRIS | ISTI Repository | CNR IRIS
2019
Contribution to conference
Open Access
Conoscenza della popolazione sulla radioprotezione e sulla dose radiante delle principali procedure radiologiche
Bastiani L, Salvadori S, Martinelli M, Moroni D, Paolicchi F, Caramella D
Nel corso degli ultimi decenni stiamo assistendo ad una rapida evoluzione delle tecniche di indagine radiologica, al fine di fornire prestazioni sempre più elevate e performanti. Il frequente e sistematico ricorso alle tecniche di diagnostica per immagini ha fatto sì che queste abbiano assunto il ruolo di strumento indispensabile per definire il corretto percorso terapeutico dei pazienti. Tutte queste metodiche tuttavia, se da un lato aumentano la capacità diagnostica delle procedure, dall'altro possono tendere ad esporre il paziente ad elevate quantità di radiazioni ionizzanti. Spesso il luogo comune associa alla parola "radiazioni" qualcosa di pericoloso. Limitata è però la consapevolezza relativa a quante radiazioni vengono impiegate per le diverse procedure diagnostiche e a quante ciascun individuo è quotidianamente esposto anche a causa del fondo naturale di radiazione.
Bastiani L, Salvadori S, Martinelli M, Moroni D, Paolicchi F, Caramella D
Nel corso degli ultimi decenni stiamo assistendo ad una rapida evoluzione delle tecniche di indagine radiologica, al fine di fornire prestazioni sempre più elevate e performanti. Il frequente e sistematico ricorso alle tecniche di diagnostica per immagini ha fatto sì che queste abbiano assunto il ruolo di strumento indispensabile per definire il corretto percorso terapeutico dei pazienti. Tutte queste metodiche tuttavia, se da un lato aumentano la capacità diagnostica delle procedure, dall'altro possono tendere ad esporre il paziente ad elevate quantità di radiazioni ionizzanti. Spesso il luogo comune associa alla parola "radiazioni" qualcosa di pericoloso. Limitata è però la consapevolezza relativa a quante radiazioni vengono impiegate per le diverse procedure diagnostiche e a quante ciascun individuo è quotidianamente esposto anche a causa del fondo naturale di radiazione.
See at:
CNR IRIS | ISTI Repository | CNR IRIS
1992
Other
Open Access
Verifying concurrent system by talking to them
Fantechi A, Gnesi S, Ristori G, Carenini M, Marino M, Moreschini P
In this paper we present a prototype translator from Natural Language expressions into Temporal Logic formulae. The translator is realized using a general development environment for Natural Language processing and it has been interfaced with a verification environment of behavioural properties on concurrent systems specified by process algebras. This too1 can be viewed as an aid to override the many imprecisions that frequently occur in the passage from informal requirements expressed by means of Natural Language expressions to Temporal Logic formulae.
Fantechi A, Gnesi S, Ristori G, Carenini M, Marino M, Moreschini P
In this paper we present a prototype translator from Natural Language expressions into Temporal Logic formulae. The translator is realized using a general development environment for Natural Language processing and it has been interfaced with a verification environment of behavioural properties on concurrent systems specified by process algebras. This too1 can be viewed as an aid to override the many imprecisions that frequently occur in the passage from informal requirements expressed by means of Natural Language expressions to Temporal Logic formulae.
2002
Journal article
Open Access
Foraging behaviour of thick-billed murres breeding in different sectors of the North Water polynya: an intercolony comparison
Falk K., Benvenuti S ., Dall'Antonia L., Gilchrist G., Kampp K.
The North Water polynya is an area of open water that occurs year round between northwest Greenland and Canada. Oceanographic conditions differ between the western ('latent heat' polynya type) and extreme eastern ('sensible heat' polynya type) sectors of the polynya, and the effects of this variation on prey availability and foraging conditions for high trophic-level predators are unknown. Thick-billed murres Uria lomvia breed on both sides of the polynya, and we conducted inter-colony comparisons of their foraging ecology. We measured time allocation and foraging efforts of chick-rearing adults using electronic data-loggers which recorded dive profiles and flight activity. Murres on the western side of the North Water polynya foraged at relatively shallow depths and rarely (4.4% of dives) explored depths beyond 70 m. In contrast, murres on the eastern side searched for prey at >70 m in 23% of all dives, and spent a greater share of each trip actively diving. The Canadian birds made foraging trips of longer duration than the Greenland murres, but they also spent more time 'resting' at the sea surface. Rest time at sea was apparently the only time buffer available for increasing foraging effort. The Greenland birds had little room for increasing foraging effort, while the Canadian birds had spare capacity for additional work. Maximum potential foraging ranges were equal at the 2 colonies (75% within 50 km), and the murres had access to approximately equally-sized areas of open sea. We estimate that the density of foraging birds at sea within the 50 km of colonies would be 6.5 times higher on the Canadian side due to the large breeding colony at Coburg Island. Intra-specific competition for food should increase with increasing colony size because the predators may reduce food resources within their foraging range. Nevertheless, the Canadian birds worked less than Greenland murres, indicating a relatively good food availability in the western part of the polynya. However, the higher foraging effort by Greenland murres paid off in a higher chick growth rate, so it remains unclear why the Canadian birds did not also make use of their spare capacity to increase foraging effort. Since high-level zooplankton/fish stock interactions are seldom part of oceanographic studies in the Arctic, seabird foraging behaviour and breeding ecology serve as two of the few indicators of possible local variation within the polynya ecosystem.Source: Marine ecology. Progress series (Halstenbek) 231 (2002): 293–302. doi:10.3354/meps231293
DOI: 10.3354/meps231293
Metrics:
Falk K., Benvenuti S ., Dall'Antonia L., Gilchrist G., Kampp K.
The North Water polynya is an area of open water that occurs year round between northwest Greenland and Canada. Oceanographic conditions differ between the western ('latent heat' polynya type) and extreme eastern ('sensible heat' polynya type) sectors of the polynya, and the effects of this variation on prey availability and foraging conditions for high trophic-level predators are unknown. Thick-billed murres Uria lomvia breed on both sides of the polynya, and we conducted inter-colony comparisons of their foraging ecology. We measured time allocation and foraging efforts of chick-rearing adults using electronic data-loggers which recorded dive profiles and flight activity. Murres on the western side of the North Water polynya foraged at relatively shallow depths and rarely (4.4% of dives) explored depths beyond 70 m. In contrast, murres on the eastern side searched for prey at >70 m in 23% of all dives, and spent a greater share of each trip actively diving. The Canadian birds made foraging trips of longer duration than the Greenland murres, but they also spent more time 'resting' at the sea surface. Rest time at sea was apparently the only time buffer available for increasing foraging effort. The Greenland birds had little room for increasing foraging effort, while the Canadian birds had spare capacity for additional work. Maximum potential foraging ranges were equal at the 2 colonies (75% within 50 km), and the murres had access to approximately equally-sized areas of open sea. We estimate that the density of foraging birds at sea within the 50 km of colonies would be 6.5 times higher on the Canadian side due to the large breeding colony at Coburg Island. Intra-specific competition for food should increase with increasing colony size because the predators may reduce food resources within their foraging range. Nevertheless, the Canadian birds worked less than Greenland murres, indicating a relatively good food availability in the western part of the polynya. However, the higher foraging effort by Greenland murres paid off in a higher chick growth rate, so it remains unclear why the Canadian birds did not also make use of their spare capacity to increase foraging effort. Since high-level zooplankton/fish stock interactions are seldom part of oceanographic studies in the Arctic, seabird foraging behaviour and breeding ecology serve as two of the few indicators of possible local variation within the polynya ecosystem.Source: Marine ecology. Progress series (Halstenbek) 231 (2002): 293–302. doi:10.3354/meps231293
DOI: 10.3354/meps231293
Metrics:
See at:
Marine Ecology Progress Series | Marine Ecology Progress Series | CNR ExploRA
2002
Journal article
Open Access
Foraging strategies of the black-legged kittiwake Rissa tridactyla at a North Sea colony: evidence for a maximum foraging range
Daunt F., Benvenuti S., Harris M. P., Dall'Antonia L., Elston D. A., Wanless S.
Black-legged kittiwakes Rissa tridactyla on the Isle of May, southeast Scotland, feed predominantly on the lesser sandeel Ammodytes marinus, an abundant, pelagic fish that is currently the subject of the largest fishery in the North Sea. The population of black-legged kittiwakes on the Isle of May is declining, and the fishery has been implicated. In order to assess this concern, there is an urgent need to improve our understanding of the factors that affect black-legged kittiwake foraging behaviour. During 1999, we carried out a detailed study of the foraging strategies of black-legged kittiwakes using purpose-built activity loggers that allowed us to distinguish 4 key behaviours: travelling flight, foraging flight, presence on the sea surface and attendance at the nest. We used the data to model 2 key aspects of time allocation at sea: (1) the relationship between the travelling time and trip duration and (2) the ratio of time spent actively foraging to time of inactivity on the sea surface at the foraging grounds. We found that a broken-stick model with a flat asymptote was the best fit for the relationship between travelling time and trip duration. Using published flight speeds for this species, we calculate that breeding black-legged kittiwakes on the Isle of May had a maximum range of 73 ± 9 km from the colony. We speculate that this upper limit is dictated by the distribution of prey rather than any energetic constraint on flight costs: a large sand bank complex, known to have high concentrations of lesser sandeels, lies entirely within this range. There was no consistent pattern in the ratio of the active to inactive components of the foraging trip, suggesting that this species exhibits highly flexible foraging strategies at sea, probably reflecting the patchy and unpredictable distribution and availability of its prey. Our findings suggest that the birds are feeding on sandeels at the same time and in the same area as the operations of the sandeel fishery.Source: Marine ecology. Progress series (Halstenbek) 245 (2002): 239–247. doi:10.3354/meps245239
DOI: 10.3354/meps245239
Metrics:
Daunt F., Benvenuti S., Harris M. P., Dall'Antonia L., Elston D. A., Wanless S.
Black-legged kittiwakes Rissa tridactyla on the Isle of May, southeast Scotland, feed predominantly on the lesser sandeel Ammodytes marinus, an abundant, pelagic fish that is currently the subject of the largest fishery in the North Sea. The population of black-legged kittiwakes on the Isle of May is declining, and the fishery has been implicated. In order to assess this concern, there is an urgent need to improve our understanding of the factors that affect black-legged kittiwake foraging behaviour. During 1999, we carried out a detailed study of the foraging strategies of black-legged kittiwakes using purpose-built activity loggers that allowed us to distinguish 4 key behaviours: travelling flight, foraging flight, presence on the sea surface and attendance at the nest. We used the data to model 2 key aspects of time allocation at sea: (1) the relationship between the travelling time and trip duration and (2) the ratio of time spent actively foraging to time of inactivity on the sea surface at the foraging grounds. We found that a broken-stick model with a flat asymptote was the best fit for the relationship between travelling time and trip duration. Using published flight speeds for this species, we calculate that breeding black-legged kittiwakes on the Isle of May had a maximum range of 73 ± 9 km from the colony. We speculate that this upper limit is dictated by the distribution of prey rather than any energetic constraint on flight costs: a large sand bank complex, known to have high concentrations of lesser sandeels, lies entirely within this range. There was no consistent pattern in the ratio of the active to inactive components of the foraging trip, suggesting that this species exhibits highly flexible foraging strategies at sea, probably reflecting the patchy and unpredictable distribution and availability of its prey. Our findings suggest that the birds are feeding on sandeels at the same time and in the same area as the operations of the sandeel fishery.Source: Marine ecology. Progress series (Halstenbek) 245 (2002): 239–247. doi:10.3354/meps245239
DOI: 10.3354/meps245239
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Marine Ecology Progress Series | Marine Ecology Progress Series | CNR ExploRA
2002
Journal article
Open Access
Greedy algorithms for tracking mobile users in special mobility graphs
Olariu S., Pinotti M. C., Wilson L.
An important issue in wireless networks is the design and analysis of strategies for tracking mobile users. Several strategies have been proposed that aim at balancing the cost of updating the user position and the cost of locating a mobile user. The recently proposed reporting center strategy partitions the cellular network into reporting and non-reporting cells, and associates with each reporting cell a set of non-reporting cells, called its vicinity. The users report their position only when they visit a reporting cell. When a call arrives, the user is searched for only in the vicinity of the last visited reporting center. For a given constant "Z", the reporting center problem asks for a set of reporting cells of minimum cardinality such that each selected cell has a vicinity of size at most "Z" so that the update cost is minimized and the locating cost is bounded by "Z". The problem was shown to be "NP"-hard for arbitrary graphs and "Z>=2". The main contribution of this work is to propose algorithms to optimally solve the reporting center problem for vicinity 2 on interval graphs and for arbitrary vicinity on proper interval graph.Source: Discrete applied mathematics 121 (2002): 215–227. doi:10.1016/S0166-218X(01)00238-4
DOI: 10.1016/s0166-218x(01)00238-4
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Olariu S., Pinotti M. C., Wilson L.
An important issue in wireless networks is the design and analysis of strategies for tracking mobile users. Several strategies have been proposed that aim at balancing the cost of updating the user position and the cost of locating a mobile user. The recently proposed reporting center strategy partitions the cellular network into reporting and non-reporting cells, and associates with each reporting cell a set of non-reporting cells, called its vicinity. The users report their position only when they visit a reporting cell. When a call arrives, the user is searched for only in the vicinity of the last visited reporting center. For a given constant "Z", the reporting center problem asks for a set of reporting cells of minimum cardinality such that each selected cell has a vicinity of size at most "Z" so that the update cost is minimized and the locating cost is bounded by "Z". The problem was shown to be "NP"-hard for arbitrary graphs and "Z>=2". The main contribution of this work is to propose algorithms to optimally solve the reporting center problem for vicinity 2 on interval graphs and for arbitrary vicinity on proper interval graph.Source: Discrete applied mathematics 121 (2002): 215–227. doi:10.1016/S0166-218X(01)00238-4
DOI: 10.1016/s0166-218x(01)00238-4
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Discrete Applied Mathematics | CNR ExploRA
2002
Journal article
Open Access
Load balanced and optimal disk allocation strategy for partial match queries on multidimensional files
Das S. K., Pinotti M. C.
A multidimensional file is one whose data are characterized by several attributes, each specified in a given domain. A partial match query on a multidimensional file extracts all data whose attributes match the values of one or more attributes specified in the query. The disk allocation problem of a multidimensional file F on a database system with multiple disks accessible in parallel is the problem of distributing F among the disks such that the data qualifying for each partial match query are distributed as evenly as possible among the disks of the system. We propose an optimal solution to this problem for multidimensional files with pairwise prime domains based on a large and flexible class of maximum distance separable codes, namely, the redundant residue codes. We also introduce a new family of residue codes, called the redundant nonpairwise prime residue codes, to deal with files whose attribute domains are nonpairwise prime.Source: IEEE transactions on parallel and distributed systems (Print) 13 (2002): 1211–1219. doi:10.1109/TPDS.2002.1158260
DOI: 10.1109/tpds.2002.1158260
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Das S. K., Pinotti M. C.
A multidimensional file is one whose data are characterized by several attributes, each specified in a given domain. A partial match query on a multidimensional file extracts all data whose attributes match the values of one or more attributes specified in the query. The disk allocation problem of a multidimensional file F on a database system with multiple disks accessible in parallel is the problem of distributing F among the disks such that the data qualifying for each partial match query are distributed as evenly as possible among the disks of the system. We propose an optimal solution to this problem for multidimensional files with pairwise prime domains based on a large and flexible class of maximum distance separable codes, namely, the redundant residue codes. We also introduce a new family of residue codes, called the redundant nonpairwise prime residue codes, to deal with files whose attribute domains are nonpairwise prime.Source: IEEE transactions on parallel and distributed systems (Print) 13 (2002): 1211–1219. doi:10.1109/TPDS.2002.1158260
DOI: 10.1109/tpds.2002.1158260
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IEEE Transactions on Parallel and Distributed Systems | IEEE Transactions on Parallel and Distributed Systems | CNR ExploRA
2002
Journal article
Open Access
Longitudinal changes of body mass index, spirometry, and diffusion in general population
Bottai M, Pistelli F, Di Pede F, Carrozzi L, Baldacci S, Matterelli G, Scognamiglio A, Viegi G
Aim of this study was to evaluate the effects of BMI changes, over an eight-year follow-up, on longitudinal changes of VC, FVC, FEV1, and DLCO indices in a general population sample of North Italy.To avoid including weight changes possibly related to physical growth, only the 1426 (46% males) adults (over 24 years) with complete follow-up were selected. Median linear regression models were applied to estimate the medians of changes (computed as follow-up minus baseline values) of VC, FVC, FEV1, and DLCO indices as functions of changes of BMI over follow-up period, separately by gender, after considering several potential confounders and effect modifiers. The extent of lung function loss tended to be higher among those who, at baseline, reported greater BMI values. Males experienced larger losses than females (20 and 16 ml FEV1 median reduction for a BMI unit increase in males and females, respectively). Conversely, longitudinal changes of BMI caused a slight and non-significant increase in DLCO values in both sexes. Over an eight-year follow-up, the detrimental effect of gaining weight might be reversible for many adults as most of those who reduced their BMI values also increased their lung function. Overweight patients with ventilatory impairment should be routinely encouraged to lose weight for improving their lung function.DOI: 10.1183/09031936.02.01282001
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Bottai M, Pistelli F, Di Pede F, Carrozzi L, Baldacci S, Matterelli G, Scognamiglio A, Viegi G
Aim of this study was to evaluate the effects of BMI changes, over an eight-year follow-up, on longitudinal changes of VC, FVC, FEV1, and DLCO indices in a general population sample of North Italy.To avoid including weight changes possibly related to physical growth, only the 1426 (46% males) adults (over 24 years) with complete follow-up were selected. Median linear regression models were applied to estimate the medians of changes (computed as follow-up minus baseline values) of VC, FVC, FEV1, and DLCO indices as functions of changes of BMI over follow-up period, separately by gender, after considering several potential confounders and effect modifiers. The extent of lung function loss tended to be higher among those who, at baseline, reported greater BMI values. Males experienced larger losses than females (20 and 16 ml FEV1 median reduction for a BMI unit increase in males and females, respectively). Conversely, longitudinal changes of BMI caused a slight and non-significant increase in DLCO values in both sexes. Over an eight-year follow-up, the detrimental effect of gaining weight might be reversible for many adults as most of those who reduced their BMI values also increased their lung function. Overweight patients with ventilatory impairment should be routinely encouraged to lose weight for improving their lung function.DOI: 10.1183/09031936.02.01282001
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European Respiratory Journal | European Respiratory Journal | CNR IRIS | CNR IRIS