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Search Results: 1 - 10 of 211 matches for " Gaia Piperno "
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Intra-fraction setup variability: IR optical localization vs. X-ray imaging in a hypofractionated patient population
Maria Spadea, Barbara Tagaste, Marco Riboldi, Eleonora Preve, Daniela Alterio, Gaia Piperno, Cristina Garibaldi, Roberto Orecchia, Antonio Pedotti, Guido Baroni
Radiation Oncology , 2011, DOI: 10.1186/1748-717x-6-38
Abstract: We analyzed data coming from 87 patients treated with hypo-fractionated radiotherapy at cranial and extra-cranial sites. Patient setup was realized through the ExacTrac X-ray 6D system (BrainLAB, Germany), consisting of 2 infrared TV cameras for external fiducial localization and X-ray imaging in double projection for image registration. Before irradiation, patients were pre-aligned relying on optical marker localization. Patient position was refined through the automatic matching of X-ray images to digitally reconstructed radiographs, providing 6 corrective parameters that were automatically applied using a robotic couch. Infrared patient localization and X-ray imaging were performed at the end of treatment, thus providing independent measures of intra-fraction motion.According to optical measurements, the size of intra-fraction motion was (median ± quartile) 0.3 ± 0.3 mm, 0.6 ± 0.6 mm, 0.7 ± 0.6 mm for cranial, abdominal and lung patients, respectively. X-ray image registration estimated larger intra-fraction motion, equal to 0.9 ± 0.8 mm, 1.3 ± 1.2 mm, 1.8 ± 2.2 mm, correspondingly.Optical tracking highlighted negligible intra-fraction motion at both cranial and extra-cranial sites. The larger motion detected by X-ray image registration showed significant inter-patient variability, in contrast to infrared optical tracking measurement. Infrared localization is put forward as the optimal strategy to monitor intra-fraction motion, featuring robustness, flexibility and less invasivity with respect to X-ray based techniques.Over the last few years, the development of Image Guided Radiation Therapy (IGRT) technologies has resulted in the design and realization of systems allowing precise patient setup and monitoring at each therapy fraction [1-3]. The rationale is related to dose escalation and hypo-fractionated protocols, which require the precise localization of the target throughout the treatment. Morphological changes, tumor shrinkage and organ motion effects lead
La préhistoire de Melka Kunturé (éthiopie)
Marcello Piperno
Bulletin du Centre de Recherche Fran?ais de Jérusalem , 2008,
Abstract: traduction fran aise, Colette Salem Bref historique des recherchesC'est en 1963 que l'hydrologue hollandais Gérard Dekker attira l'attention du Service des Antiquités d'Addis Abéba sur le site de Melka Kunturé. La même année, G. Bailloud menait les premières recherches en surface, récoltant de nombreux objets fa onnés en pierre, ainsi que des restes d'ossements d'animaux.Depuis 1965, une mission franco-éthiopienne, dirigée par Jean Chavaillon, a entrepris des recherches systématiques sur le s...
The prehistory of Melka Kunture (Ethiopia)
Marcello Piperno
Bulletin du Centre de Recherche Fran?ais de Jérusalem , 2008,
Abstract: A brief history of discoveries and researchesThe site of Melka Kunture was discovered and proposed to the attention of the Ethiopian Archaeological Service for the first time in 1963 by G. Dekker. The same year a French prehistorian archaeologist, G. Bailloud, carried out the first surface surveys and collected important lithic materials and faunal remains. Since 1965, a French-Ethiopian mission directed by Jean Chavaillon faced to the systematic investigation of the Paleolithic site through ...
Search Space Contraction in Canonical Labeling of Graphs
Adolfo Piperno
Computer Science , 2008,
Abstract: The individualization-refinement paradigm for computing a canonical labeling and the automorphism group of a graph is investigated. A new algorithmic design aimed at reducing the size of the associated search space is introduced, and a new tool, named "Traces", is presented, together with experimental results and comparisons with existing software, such as McKay's "nauty". It is shown that the approach presented here leads to a huge reduction in the search space, thereby making computation feasible for several classes of graphs which are hard for all the main canonical labeling tools in the literature.
Recovery of Hunger Sensations Associated with Low Preprandial Blood Glucose: An Easy Exit from Diabetes?  [PDF]
Mario Ciampolini, Gaia Cecchi
Open Journal of Preventive Medicine (OJPM) , 2016, DOI: 10.4236/ojpm.2016.65014
Abstract: Background: Obesity, diabetes, asthma, autism, birth defects, dyslexia, attention deficit-hyperactivity disorder and schizophrenia have increased in children in the last half century. These increases may depend on the widespread, well known error in energy balance: the unremitting addition of fat at any will (decision) to eat. In most (60%) but not all people, the decision arises as conditioned before energy exhaustion of the energy available from previous meals. After meal suspension for few hours (up to 48 hours), healthy subjects identified the arousal of sensations of hunger that we named Initial Hunger (IH). After this identification, subjects distinguished IH from conditioned sensations before subsequent meals by mental comparison of the current arousal with the remembered IH. BG decreased to 76.6 ± 3.7 mg/dL and hunger sensations (Initial hunger, IH) arose spontaneously and corresponded to the complete exhaustion of the previous meals. Objective: Not Insulin Dependent (NID) diabetic people differ from fattening people in this: after meal suspension, they do not develop any hunger sensation nor the associated low blood glucose (BG). Methods: Meal suspension lets IH arise and after no arousal, reduction of energy intake. The two subjects consumed meals that provided at least 20 grams of animal protein and up to one kg of not-starchy vegetable (NSV) for 6 to 12 months. At reappearance of IH, we implemented an Initial Hunger Meal Pattern (IHMP). Results: We tried to implement IHMP training in two obese (BMI of 39 and 33) adults out of two consecutive recruitments of subjects who showed high fasting BG. We found an absence of BG decline to 76.6 ± 3.7 mg/dL and an absence of any hunger sensation after eating suspension. Both subjects lost 13% - 20% of their body weight and recovered 76.6 ± 3.7 mg/dL of BG and hunger sensations, i.e., went off diabetes. IHMP maintained the decreased body weight in the subsequent months. Conclusion: Diabetes develops for inveterate conditioned intake (when previous energy intake has not been fully exhausted before meals), excessive fattening (with presumed excessive post-absorption emission of fatty acids from fatty tissues), permanent loss of BG decline to 76.6 ± 3.7 mg/dL and permanent loss of physiological signals of hunger. A healthy, non-diabetic life may be recovered by painless loss of weight up to 20%. The body weight remained stable by implementing IHMP at reappearance of hunger sensations. This costs accurate energy intake planning instead of hunger endurance.
Sulle tracce della Mamá Grande. La costruzione dell'immaginario femminile nell’opera di Gabriel García Márquez
Gaia Marzo
Altre Modernità , 2010,
Abstract: Sulle tracce della Mamá Grande. La costruzione dell'immaginario femminile nell’opera di Gabriel García Márquez Scheda tesi di Gaia Marzo RELATORE: Prof. Paolo Proietti CORSO DI LAUREA: Comunicazione e gestione nei mercati dell’arte e della cultura UNIVERSITA': Libera Università di Lingue e Comunicazione IULM di Milano ANNO ACCADEMICO: 2008/2009
Due sotto l'impero. India e Australia nel XIX secolo
Gaia Giuliani
Scienza & Politica : per una Storia delle Dottrine , 2009, DOI: 10.6092/issn.1825-9618/2742
Abstract: Due sotto l’impero. India e Australia nel XIX secolo
From Land art to the “global era”
Gaia Salvatori
JCOM : Journal of Science Communication , 2008,
Abstract: In the globalisation era, arts have provided food for thought on “how latitudes became forms”, to stress again that now, at global level, one should no longer define art as a contemplation “space”, but as an “environment”, a place for experience. On the other hand, already when Bern saw the inauguration of the historic exhibition “When Attitudes became Forms” in 1969, people realised that the problem was lying in the behaviour, in the attitude, of making arts towards the world. Basically, the formalistic concept of self-referentiality in a work of art was to be overcome, and attention was to be paid to procedures and contexts. In search of a new humanism in contact with the natural universe.
From Land art to the “global era” (Italian original version)
Gaia Salvatori
JCOM : Journal of Science Communication , 2008,
Abstract: In the globalisation era, arts have provided food for thought on “how latitudes became forms”, to stress again that now, at global level, one should no longer define art as a contemplation “space”, but as an “environment”, a place for experience. On the other hand, already when Bern saw the inauguration of the historic exhibition “When Attitudes became Forms” in 1969, people realised that the problem was lying in the behaviour, in the attitude, of making arts towards the world. Basically, the formalistic concept of self-referentiality in a work of art was to be overcome, and attention was to be paid to procedures and contexts. In search of a new humanism in contact with the natural universe.
Estrategias de intervención en áreas urbanas inundables: el caso Bella Unión, Uruguay
Piperno,Adriana; Sierra,Pablo;
EURE (Santiago) , 2013, DOI: 10.4067/S0250-71612013000100009
Abstract: this study aims to characterize and provide items to operate in flooded areas of bella union city. although floodings cannot be defined as disasters, they strongly affect the local economy, as they have an impact on vulnerable sectors of the population. its floodplain has increased since 1979 by the installation of salto grande dam. compensation actions arepresented as an opportunity for developing detailed studies of the area and definingfurther con vergent and integrated actions to manage these areas. the methodology is based on the analysis of the interaction of water and territorial systems, recognizing different levels of risk in the affected area and the associated impacts. it considers both the level of hazard and vulnerability of its inhabitants. it also recognizes the potential of the area to incorporate the river to the city's collective imaginary.
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