325,666 research outputs found
Carlo Pucci e l ' Unione Matematica Italiana
No full textLa figura di Carlo Pucci ha svolto un ruolo essenziale nella vita matematica italiana della seconda metà del ventesimo secolo per la sua duplice personalità scientifica e politica. Allievo di Giovanni Sansone e di Mauro Picone egli diede notevoli contributi alla Analisi Matematica principalmente nel campo dei cosiddetti “problemi mal posti”, teoria delle equazioni differenziali, problemi varii di natura geometrica. Fu ottimo didatta ed ebbe molti allievi, tra cui ricordiamo Giorgio Talenti.
Quale nipote (figlio di una sorella) di Ernesto Rossi, fin dalla prima giovinezza ebbe modo di partecipare alla situazione politica italiana e di comprendere la natura del fascismo. Partecipò alla resistenza e fu ufficiale volontario nell’ esercito italiano distinguendosi nella battaglia di Alfonsine. Coadiuvò poi, come segretario, lo zio nel primo periodo della repubblica ancora partecipando in prima persona alla vita politica nazionale.
Egli cercò di far convivere le due vocazioni scientifica e politica, occupandosi in modo estremamente attivo alla vita politica scientifica e particolarmente matematica italiana, giungendo certo ad essere la figura centrale di riferimento nazionale in questo campo per decenni. Fu presidente dell’ Unione Matematica Italiana, presidente del Comitato Nazionale della Matematica del CNR (ideando e perseguendo un programma utilissimo di borse di studio per giovani per studi all’ estero), presidente attivissimo del COASSI, presidente dell’ Istituto Nazionale di Alta Matematica (che deve sostanzialmente a lui la sua ricostruzione), direttore (e fondatore) del centro di Analisi Globale di Firenze, ..
Nel decennale della sua scomparsa i proff. Figà Talamanca (Roma, la Sapienza) e Luigi Pepe (Università, Ferrara) hanno curato un volume, preceduto da un ampio convegno a Firenze col compito di dare dimensione storica all’ azione di Carlo Pucci.
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Compito di chi scrive è stato trattare il rapporto di Pucci con la Unione Matematica Italiana (UMI). Il lavoro, qui presentato, è stato integralmente basato sullo studio dei documenti (verbali di riunioni, testi di accordi, testimonianze personali,..) non solo del periodo della presidenza del Pucci, ma sostanzialmente dell’ ampio periodo 1959-2002.
Ho così ho potuto riconoscere nelle idee fondamentali di Carlo Pucci sulla importanza dello stato di diritto, sulla importanza di una politica aperta dell’ informazione i fondamenti della sua azione all’ UMI. Sulla base delle fonti così ho riconosciuto nel grande rilancio scientifico e politico dell’ Unione da Pucci lucidamente intrapreso e perseguito l’ attuazione delle sue idee politiche ed anche scientifiche. Scientificamente, si deve all’ azione di Pucci il lancio di una rivista di Storia della Matematica, il rilancio del Bollettino dell’ Unione, la creazione della collana dei “Quaderni dell’ UMI” e quella delle Monografie. Politicamente, la posizione allarmata e negativa dell’ UMI alle intemperanze del periodo sessantottino sono provate ed è ben provata la influenza di Pucci su queste, la azione dell’ UMI nella determinazione dei settori scientifico- disciplinari ministeriali per la matematica sentono fortemente dell’ azione organizzatrice di Pucci. Il metodo seguito dall’ UMI nell’ affrontare i tanti problemi organizzativi e scientifici (istituzione dei dottorati e loro ordinamento, rapporti tra matematica “pura” ed “applicata”, massima pubblicizzazione dei risultati delle ricerche scientifiche in Italia ed insieme delle politiche seguite dai varii organi di ricerca matematica, ...) è consistito sempre nel far precedere l’ azione politica da uno studio qualitativo e quantitativo dei problemi da affrontare.
La lettura diretta delle fonti ha quindi permesso, così spero, di illustrare un piccolo, ma interessante squarcio della Storia della Matematica italiana della seconda metà del ventesimo secolo. La prima parte del lavoro espone i più significativi episodi provati con documentazioni sicure, la seconda le conclusioni. Questo mi ha portato ad un contributo necessariamente piuttosto ampio
Antiemicranici specifici in Europa e nel mondo. Allena M, Terrazzino S, Pucci E, Tassorelli S.
No full textHyperomocisteinemia and stroke: a case report. Pucci E, Rodigari A, Bruscella S, Cristina S, Sandrini G.
No full textObservational study to assess the efficacy of "opera" in reducing polyneuropatic symptoms. Pucci E, Cristina S, Scarì G, Galante R.
No full textLa farmacoresistenza ai triptani: un problema che riguarda migliaia di persone in Italia. Cargnin S, Terrazzino S, Pucci E, Viana M.
No full textKrabbe disease: a case of late-onset form. Pucci E, Bruscella S, Rognone E, Bastianello S, Cristina S, Sandrini G.
No full textThe Düzce segment of the North Anatolian Fault Zone (Turkey): Understanding its seismogenic behavior through earthquake geology,
No full textThe area struck by the November, 12, 1999, Mw 7.1 earthquake that ruptured the Düzce segment of the North Anatolian Fault Zone (NAFZ) was investigated. In order to document the Düzce seismogenic fault characteristics, segment of the North Anatolian fault, systematic geological, geomorphological and paleoseismological analyses were integrated in this thesis.
A detailed mapping and study of the 1999 earthquake coseismic ruptures and of the short- (Holocene) long-term (Pliocene-Pleistocene) tectonic landforms, first, in a key area, then, along the whole Düzce fault was carried out. The major objective were to compare the detailed coseismic surface expressions with the short/long-term morphology and structural architecture of the Düzce fault zone. This was accomplished to explore the persistency or evolution through time of the active fault setting, at the surface, that could highlight characteristics of the seismic source, at depth.
Along the key area was possible to zoom in a scale-independent en-échelon arrangement of the coseismic surface ruptures and to evidence by the comparison with the short/long-term geomorphic expression of the Düzce Fault near the 1999 ruptures, that: 1) the principal slip zone at depth accommodates the bulk of the displacement during an individual rupture event and 2) may stay localized through many rupture episodes with persistent geometry and kinematics. At the same time, an old and complex fault arrangement has been mapped, partially coinciding with the 1999 rupturing fault, whose relationships with the coseismic fault systems suggest an evolution of the fault pattern trough time, with a tendency to simplify a geometric complexity into a straighter, mature trace.
Along the whole area, also, the older complex fault system, which involves a wider zone of deformation, was identified and the structural pattern of the simple 1999 coseismic fault trace was analyzed at the different scales of observation. Overall, two different sections of the Düzce segment were recognized: a western section, where the coseismic fault trace has a staircase trajectory and reactivated part of the older fault system; an eastern section, where the coseismic fault trace shows a straight trajectory and cross-cuts the older and complex fault system. The Düzce fault sections may represent different stages of the segment evolutionary tendency towards a simpler mature trace, as a mechanically more favorable setting. The western section of the Düzce fault segment splays out from a restraining bend of the Izmit (Karadere) fault segment of the NAFZ, and forms a releasing fault wedge. By comparing the coseismic surface deformation field with the observed long-term morphology it is clear that the present landforms and setting are the result of 1999-type coseismic deformation repeating through several seismic cycles. Because of the mechanical interaction of the faults in the release junction, the western section of the Düzce fault undergoes a transtensional strain field that may justify and cause its complexities to be a steady state of the structural arrangement.
The boundary at the surface between the two portions of the Düzce fault is not only a surface characteristic but it separates at depth a portion of fault plane characterized by a big single asperity, to the east, from a portion of plane with lower slip, to the west. Thus the peculiar arrangement of the Izmit (Karadere) and Düzce fault segments may permanently control the difference in behavior of the two portions of Düzce fault and furthermore control rupture propagation and fault loading. Under this light, the Izmit/Düzce release fault junction (1) may produce an unfavorable setting for the build up of asperities in the western part of the Düzce segment also in the future and (2) could have delayed the propagation of the 1999 August Izmit rupture on the Düzce segment that ruptured on November 1999 along the asperity of its eastern section.
These results highlight that the surface geological data contain the potential for integrating and completing the information for imaging structures also at a seismogenic depth. The integrated investigation of short/long-term tectonic morphologies and structural pattern offers a noteworthy frame to interpret the coseismic rupture kinematics and clarifies their complexities. Moreover, for a full understanding of the principal slip zone at depth, this case study shows the importance to define the strain distribution pattern and evolution of surface rupturing faults.
The geological and geomorphological map along the fault trace permitted to analyze the spectacular tectonically driven cumulative landforms and the drainage pattern settings, in order to provide new estimates on the Quaternary slip rate of this part of the active transform margin of North Anatolia. As offset geomorphic markers, right-hand stream deflections and remnant of an old alluvial fan modeled by fluvial terraces were reconstructed and described. The streams are deflected for a total of about 100 m and the onset of the offset was radiocarbon dated about 7000 yr BP. The two documented and correlated Late Pleistocene, terrace risers are offset of about 300 and 890 m, respectively. These terrace risers were dated by means of Optically Stimulated Luminescence (OSL) method about 21 000 yr BP and 60 000 yr BP. These ages and offsets translate to a constant rate of deformation of the Düzce Fault, at different time scales, of 14.0 ± 1.8 mm/yr and disproves a time-variable model at least for the last 60 000 yr. On this light, considering the GPS-measured strain accumulation due to the plate motion along this part of the North Anatolian Fault Zone, the Düzce Fault importantly participates to the North Anatolian margin deformation and assumes a relevant role in the seismic hazard of the area.
To learn about recurrence of large earthquakes on this fault, paleoseismological trench investigations were undertaken. On the basis of sedimentary and structural relations observed in the trench walls, evidence for repeated surface faulting paleoearthquakes pre-dating the 1999 event were found. By merging information obtained from all the trenches it is possible to reconstruct the seismic history of the Düzce fault for the past millennium. Coeval events between different trench sites were correlated under the assumption that, similarly to the 1999 event, paleoearthquakes ruptured the whole Düzce fault. Besides the 1999 earthquake, prior surface faulting earthquakes are dated as follows: penultimate event, possibly at the end of 19th century; third event, possibly close to AD 1700; fourth event, AD 1185-1640; fifth event, possibly AD800-1000. According to the above results, the AD1719, AD1878 and AD 1894 historical earthquakes, may have ruptured the Düzce fault and not the faults they are usually associated to or, alternatively, a cascade of events occurred on the Düzce and nearby faults (similarly to the Izmit and Düzce 1999 earthquakes). On this basis can be inferred an average recurrence time of ~300 yrs for large surface faulting events on the Düzce fault. Moreover, assuming that the slip produced by the 1999 earthquake is characteristic, the Düzce fault presents a strain release model, with a not perfectly periodic interseismic interval, and an average strain accumulation of 13.3 mm/yr, comparable with the slip rate results obtained by the geomorphic marker analysis.This work was supported by the European Commission Project Relief: Large earthquake faulting and implications for seismic hazard assessment in Europe: The Izmit-Düzce earthquake sequence of 1999, Turkey, Mw 7.4, 7.1, EVG1-CT-2002-00069.Unpublishedope
The Düzce segment of the North Anatolian Fault Zone (Turkey): Understanding its seismogenic behavior through earthquake geology,
No full textThe area struck by the November, 12, 1999, Mw 7.1 earthquake that ruptured the Düzce segment of the North Anatolian Fault Zone (NAFZ) was investigated. In order to document the Düzce seismogenic fault characteristics, segment of the North Anatolian fault, systematic geological, geomorphological and paleoseismological analyses were integrated in this thesis.
A detailed mapping and study of the 1999 earthquake coseismic ruptures and of the short- (Holocene) long-term (Pliocene-Pleistocene) tectonic landforms, first, in a key area, then, along the whole Düzce fault was carried out. The major objective were to compare the detailed coseismic surface expressions with the short/long-term morphology and structural architecture of the Düzce fault zone. This was accomplished to explore the persistency or evolution through time of the active fault setting, at the surface, that could highlight characteristics of the seismic source, at depth.
Along the key area was possible to zoom in a scale-independent en-échelon arrangement of the coseismic surface ruptures and to evidence by the comparison with the short/long-term geomorphic expression of the Düzce Fault near the 1999 ruptures, that: 1) the principal slip zone at depth accommodates the bulk of the displacement during an individual rupture event and 2) may stay localized through many rupture episodes with persistent geometry and kinematics. At the same time, an old and complex fault arrangement has been mapped, partially coinciding with the 1999 rupturing fault, whose relationships with the coseismic fault systems suggest an evolution of the fault pattern trough time, with a tendency to simplify a geometric complexity into a straighter, mature trace.
Along the whole area, also, the older complex fault system, which involves a wider zone of deformation, was identified and the structural pattern of the simple 1999 coseismic fault trace was analyzed at the different scales of observation. Overall, two different sections of the Düzce segment were recognized: a western section, where the coseismic fault trace has a staircase trajectory and reactivated part of the older fault system; an eastern section, where the coseismic fault trace shows a straight trajectory and cross-cuts the older and complex fault system. The Düzce fault sections may represent different stages of the segment evolutionary tendency towards a simpler mature trace, as a mechanically more favorable setting. The western section of the Düzce fault segment splays out from a restraining bend of the Izmit (Karadere) fault segment of the NAFZ, and forms a releasing fault wedge. By comparing the coseismic surface deformation field with the observed long-term morphology it is clear that the present landforms and setting are the result of 1999-type coseismic deformation repeating through several seismic cycles. Because of the mechanical interaction of the faults in the release junction, the western section of the Düzce fault undergoes a transtensional strain field that may justify and cause its complexities to be a steady state of the structural arrangement.
The boundary at the surface between the two portions of the Düzce fault is not only a surface characteristic but it separates at depth a portion of fault plane characterized by a big single asperity, to the east, from a portion of plane with lower slip, to the west. Thus the peculiar arrangement of the Izmit (Karadere) and Düzce fault segments may permanently control the difference in behavior of the two portions of Düzce fault and furthermore control rupture propagation and fault loading. Under this light, the Izmit/Düzce release fault junction (1) may produce an unfavorable setting for the build up of asperities in the western part of the Düzce segment also in the future and (2) could have delayed the propagation of the 1999 August Izmit rupture on the Düzce segment that ruptured on November 1999 along the asperity of its eastern section.
These results highlight that the surface geological data contain the potential for integrating and completing the information for imaging structures also at a seismogenic depth. The integrated investigation of short/long-term tectonic morphologies and structural pattern offers a noteworthy frame to interpret the coseismic rupture kinematics and clarifies their complexities. Moreover, for a full understanding of the principal slip zone at depth, this case study shows the importance to define the strain distribution pattern and evolution of surface rupturing faults.
The geological and geomorphological map along the fault trace permitted to analyze the spectacular tectonically driven cumulative landforms and the drainage pattern settings, in order to provide new estimates on the Quaternary slip rate of this part of the active transform margin of North Anatolia. As offset geomorphic markers, right-hand stream deflections and remnant of an old alluvial fan modeled by fluvial terraces were reconstructed and described. The streams are deflected for a total of about 100 m and the onset of the offset was radiocarbon dated about 7000 yr BP. The two documented and correlated Late Pleistocene, terrace risers are offset of about 300 and 890 m, respectively. These terrace risers were dated by means of Optically Stimulated Luminescence (OSL) method about 21 000 yr BP and 60 000 yr BP. These ages and offsets translate to a constant rate of deformation of the Düzce Fault, at different time scales, of 14.0 ± 1.8 mm/yr and disproves a time-variable model at least for the last 60 000 yr. On this light, considering the GPS-measured strain accumulation due to the plate motion along this part of the North Anatolian Fault Zone, the Düzce Fault importantly participates to the North Anatolian margin deformation and assumes a relevant role in the seismic hazard of the area.
To learn about recurrence of large earthquakes on this fault, paleoseismological trench investigations were undertaken. On the basis of sedimentary and structural relations observed in the trench walls, evidence for repeated surface faulting paleoearthquakes pre-dating the 1999 event were found. By merging information obtained from all the trenches it is possible to reconstruct the seismic history of the Düzce fault for the past millennium. Coeval events between different trench sites were correlated under the assumption that, similarly to the 1999 event, paleoearthquakes ruptured the whole Düzce fault. Besides the 1999 earthquake, prior surface faulting earthquakes are dated as follows: penultimate event, possibly at the end of 19th century; third event, possibly close to AD 1700; fourth event, AD 1185-1640; fifth event, possibly AD800-1000. According to the above results, the AD1719, AD1878 and AD 1894 historical earthquakes, may have ruptured the Düzce fault and not the faults they are usually associated to or, alternatively, a cascade of events occurred on the Düzce and nearby faults (similarly to the Izmit and Düzce 1999 earthquakes). On this basis can be inferred an average recurrence time of ~300 yrs for large surface faulting events on the Düzce fault. Moreover, assuming that the slip produced by the 1999 earthquake is characteristic, the Düzce fault presents a strain release model, with a not perfectly periodic interseismic interval, and an average strain accumulation of 13.3 mm/yr, comparable with the slip rate results obtained by the geomorphic marker analysis.This work was supported by the European Commission Project Relief: Large earthquake faulting and implications for seismic hazard assessment in Europe: The Izmit-Düzce earthquake sequence of 1999, Turkey, Mw 7.4, 7.1, EVG1-CT-2002-00069.Unpublishedope
Correlators of supersymmetric Wilson loops at weak and strong coupling
No full textBassetto A, Griguolo L, Pucci F, Seminara D, Thambyahpillai S, Young D. Correlators of supersymmetric Wilson loops at weak and strong coupling. Journal of High Energy Physics. 2010;2010(3): 38.We continue our study of the correlators of a recently discovered family of BPS Wilson loops in N = 4 supersymmetric U(N) Yang-Mills theory. We perform explicit computations at weak coupling by means of analytical and numerical methods finding agreement with the exact formula derived from localization. In particular we check the localization prediction at order g(6) for different BPS "latitude" configurations, the N = 4 perturbative expansion reproducing the expected results within a relative error of 10(-4). On the strong coupling side we present a supergravity evaluation of the 1/8 BPS correlator in the limit of large separation, taking into account the exchange of all relevant modes between the string worldsheets. While reproducing the correct geometrical dependence, we find that the associated coefficient does not match the localization result
Microctonus gouleti Pucci 2013, new species
No full textM. gouleti Pucci new species Figures 61–63 Etymology: In honor of Dr. Henri Goulet, an accomplished entomologist who has been especially helpful to the author with this project. Females.—Color: Head orange but flagellum and near the ocelli brown to black; mesonotum black but occasionally orange anteriorly and/or scutellar disk orange to brown, orange below but often dark brown to black ventrally; legs orange but tarsi and hind tibia often brown; propodeum black but occasionally orange laterally; petiole black but for anterior end orange; remaining metasoma orange to black. Length excluding ovipositor: approximately 3.1–4.0. Head: Occipital carina absent medially; lateral eye/gena 1.3–1.6; transverse head/face 2.1– 2.3; flagellum length 2.5–3.0, number of flagellomeres 23–26; first flagellomere/second 1.2–1.3; face smooth but for setal insertions; clypeus suboval to subtriangular; length of last four maxillary palpomeres/fore femur length 0.67–0.77. Mesosoma: Subanterior pronotum carinate, pronotum smooth to rugulose elsewhere; number of setae along widest transverse line of anterior lobe approximately 16; notaulus foveate, joined at approximately posterior 1/3 of mesoscutum; longitudinal carina on the posterior mesoscutum present or absent; lateral mesonotal lobes glabrous but for a narrow fringe, exceptionally with setae present centrally; C+SC+R length 1.2–1.5; stigma length/R1 1.4–1.7; fore wing RS a shallow arch; sternaulus formed by fovea extending diagonally dorso-anteriorly to postero-ventrally then horizontally to propodeum; propodeum areolate-rugose, median groove moderate; outline of propodeum in lateral view usually convex, sometimes posterior end vertical; setae of hind femur less than half maximum femur width; hind tibia less than C+SC+R. Metasoma: Petiole with longitudinal striae curved medially as they extend posteriorly; subbasal petiole rounded dorso-laterally; petiole length/posterior width 2.6–3.2; terga 2 + 3 length 0.67–0.80; sheath length 0.90–1.0, sheath/C+SC+R 0.62–0.78. Males differ from females by the following: length approximately 2.9; C+SC+R 1.1–1.2; transverse head/face 1.9; flagellum length 3.2, number of flagellomeres 28; petiole length/posterior width 2.3–2.7; the striae of the petiole is not as strongly curved. Specimens examined: Holotype: female, Mexico, Chiapas, 7200’, S. Crist. las Casas, VI. 1.1969, Malaise trap (CNC). Paratypes: Mexico: 1 male, Chiapas, Teopisca, route 190, H. V. Weems Jr., VIII. 20.1963, 6000–6500’ (FSCA); 1 male, Chiapas, 7200’, S. Crist. las Casas, VI. 18.1969, Malaise trap (CNC); 1 female, Chiapas, Mpio. San Cristobal, Reserva Huitepec, 7440’, VII.2–14.1997, 97/073, Wooley & Gonzales (TAMU); 1 female, Chiapas, Munic: San Cristobal, San Felipe, 2200m, VII.1991, R Jones (TAMU); 1 female, Durango, 9000’, El Salto, 10 mi. W, VI.11.1964, W.R. M. Mason (CNC); 1 female, as above but VI. 19.1964 (CNC); 1 female, as above but VI. 20.1964 (CNC); 1 female, as above but VI. 22.1964 (CNC); 1 female, Durango, 3 mi. E El Salto, 8400’, VI.21.1964, W.R. M. Mason (CNC); 2 female, Guerrero, 6.4 mi. SW Filo de Caballo, VII.8.1987, 9000’, Wooley & Zolnerowich (TAMU); 1 female, Guerrero, 6.6 mi. SW Filo de Caballo, VII.12.1985, J. Wooley & G. Zolnerowich (TAMU); 1 male, Michoacan, 6 miles N. Cheran, VII.7–8.1985, J. Wooley, G. Zolnerowich, 85/034 (TAMU); 1 male, as above but VII.8.1985, Wooley & Zolnerowich (TAMU); 1 male, Nayarit, Ahuacatlan, VIII. 6.1965, HE & MA Evans (MCZ); 1 male, Puebla, 4.7 mi. SW La Cumbre, 5100’, VII.23.1987, Wooley & Zolnerowich (TAMU); 1 male, Sinaloa, 20 mi. E Condordia, 3000’, VIII.8.1964, W.R. M. Mason (CNC); 1 female, Texpan [Tuxpan, Veracruz?], VIII.12.1954, 7500’, R. R. Dreisbach (MSUC); 1 male, Orizaba [Veracruz], Crawford (USNM). Guatemala: 1 male, Escuintla, VIII. 20.1975, N.L.H. Krauss (USNM). Flight period: June through August. Remarks: The orange dorso-posterior edge of the pronotum almost always distinctly contrasts with the black mesonotum. There are four specimens from Smokemont, NC (NCSU) that correspond with the description above but the hind wing M/r-m is 0.47–0.58 as opposed to measures of 0.75–1.0 for M. gouleti. This character is rarely used by the present author because large ranges within a species have been observed. The Smokemont specimens are designated, “near M. gouleti ” because of the disjunct distribution.Published as part of Pucci, Thomas M., 2013, Contributions to the classification of North American Microctonus (Braconidae, Euphorinae), pp. 1-150 in Zootaxa 3725 (1) on pages 16-17, DOI: 10.11646/zootaxa.3725.1.1, http://zenodo.org/record/526804
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