186,327 research outputs found
Permian tetrapod localities in the Nurra region (NW Sardinia, Italy): The State of the Art
No full textThe Nurra area in NW Sardinia is quite well known for the outcropping of a thick succession of more than 600 m of post‐ Variscan continental deposits (Fig. 1), with several dedicated studies and contribution already starting from the first half of the twentieth century (e.g. Lotti, 1931; Oosterbaan, 1936; Pecorini, 1962; Vardabasso, 1966; Gasperi and Gelmini, 1980)...Fil: Romano, Marco. University of the Witwatersrand; SudáfricaFil: Citton, Paolo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigación en Paleobiología y Geología; ArgentinaFil: Ronchi, Ausonio. Università di Pavia; ItaliaFil: Nicosia, Umberto. Università di Roma; Itali
Yves CITTON (2017), Médiarchie
No full textDans cet essai (très) dense de 385 pages, Yves Citton défend la thèse principale selon laquelle notre immersion dans les appareils techniques (et médiatiques) conditionne (presque) inconsciemment « ce que nous sentons, pensons, exprimons, faisons » (p. 138). La « médiarchie » décrite par Citton renvoie donc à « des régimes de pouvoir au sein desquels les médias sont des vecteurs d’affectations opérant ponctuellement comme des catalyseurs d’affects » (p. 97). Ces « régimes de pouvoir » sont pr..
Tetrapod ichnology in Italy. The state of the art. Guest editorial
No full textThis year, 2020, marks the 150thanniversary of the seminal work by Giulio Curioni (1870), representing the first published scientific contribution on tetrapod footprints from Italy. We took this opportunity to discuss the current state of the art on tetrapod ichnology in our country, with a jubilee issue, titled "Tetrapod ichnology in Italy: the state of the art". The issue involves the scholars who first pioneered this discipline in Italy in the seventies of the last century, along with all the authors who have worked on the topic in recent decades, and younger generations who have just started to enthusiastically contribute to vertebrate ichnology. After briefly introducing the idea at the base of the Special Issue, as well as some aspects of the discipline and the current methodologies involved in ichnological studies, we present each of the contributions to serve the Italian ichnological heritage
Paleoecology of the foraminifer Acruliammina longa (Tappan, 1940) from the upper Hauterivian of the Neuquén Basin (northern Patagonia, Argentina)
No full textHerein the epibiont agglutinated placopsilinid foraminifer Acruliammina longa from the upper Hauterivian of the Neuquén Basin is discussed. This is the first record from South America of A. longa, already known from the upper Valanginian to lower Turonian? of North America and Europe. The studied material consists of foraminiferal tests forming macroids and encrusting the valves of Ptychomya koeneni, coming from poorly lithified claystones/siltstones to marlstones forming high frequency (6th-order) depositional sequences within the upper Hauterivian Agua de la Mula Member of the Agrio Formation. This new record extends the paleobiogeographic distribution of A. longa, and allows us to investigate the paleoenvironmental and paleoecological significance of this species in a mixed carbonate and siliciclastic ramp. Energy dispersive spectroscopy and X-ray computed microtomography were used to evaluate taphonomic features of foraminiferal tests, highlighting differences between tests that encrust bivalves and those forming macroids, which also differ in their position within the 3rd-order sedimentary sequences. A. longa tests encrusting bivalves are less damaged, show coarser grain size, and occur throughout the 3rd-order regressive systems tracts, whereas tests forming macroids show higher breakage and finer grain size, occurring throughout the 3rd-order transgressive systems tracts. This distribution allows us to interpret changes in rates of terrigenous input at the time of encrustation, and also in energy conditions, highlighting the opportunistic behavior of A. longa. Low sedimentation rates represent the main paleoenvironmental condition that favored foraminiferal propagule settlement and the growth of A. longa, both on bivalve fragments exposed on the seafloor in the case of macroids, and on living Ptychomya koeneni shells.Fil: Caratelli, Martina. Universidad Nacional de Río Negro. Sede Alto Valle. Instituto de Investigaciones en Paleobiología y Geología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigación en Paleobiología y Geología; ArgentinaFil: Citton, Paolo. Universidad Nacional de Río Negro. Sede Alto Valle. Instituto de Investigaciones en Paleobiología y Geología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigación en Paleobiología y Geología; ArgentinaFil: Archuby, Fernando. Universidad Nacional de la Plata. Facultad de Cs.naturales y Museo. Centro de Estudios Integrales de la Dinamica Exogeno.; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; ArgentinaFil: Pignatti, Johannes. Università degli studi di Roma "La Sapienza"; Itali
[ CR de lecture ] - Désillusion combative: Yves Citton, Faire avec - Conflits, coalitions, contagions, Les liens qui libèrent, 2021, 192 p., 16 €
No full textInternational audienceTitre recensé: Yves Citton, Faire avec - Conflits, coalitions, contagions, Les liens qui libèrent, 2021, 192 p., 16
A review of the concepts of ‘axony’ and their bearing on tetrapod ichnology
No full textTwo meanings of the term axony are found in the ichnological literature. Multiple meanings may prove to be a double-edge sword, complicating scientific communication. In vertebrate ichnology the first meaning of axony relies on aspects of locomotion related to the body weight support and propulsive thrust. A second one concerns axony as a purely geometric and dimensional descriptor. These approaches are based on a static view of the impression process, implying the loss of much important information. Here we report an analysis of shallowly impressed footprints referred to the ichnotaxa Ichniotherium sphaerodactylum and Dimetropus osageorum. The analysis was carried out by considering the track registration as a dynamic process and attempting to identify and describe axony conditions during movements. Variations in the axony conditions can be understood in the light of the producer’s foot anatomy and the reciprocal relations between foot bone elements. The concept of axony can be a useful tool in ichnological practice only when it is related to the complex dynamic of locomotion and the resulting track registration. It can help in restoring the interconnections between track and trackmaker, re-establishing the biological significance of tetrapod footprints
Gallucci site_Río Negro, Patagonia, Argentina
No full text3D model of Gallucci site.Full reference: Béguelin M., Vazquez R.C., Citton P. and Otero F. 2024. Sitio Gallucci: primer hallazgo arqueológico de restos óseos humanos en el valle superior del Río Negro, Patagonia Argentina. Comechingonia. Revista de Archeologia, 28, https://revistas.unc.edu.ar/index.php/comechingonia/article/view/42379</p
Effect of unilateral adrenalectomy on the quality of life of patients with lateralized primary aldosteronism
No full textBackground. Previous studies reported that primary aldosteronism (PA) is associated with an increased prevalence of anxiety, depression and subnormal quality of life (QoL) scores that may be improved after surgical treatment.
Aim of the Study. The aim of the study was to assess the impact of surgery on health-related QoL and depression status of patients suffering from PA, comparing the results with a control group of patients undergoing surgery for a non-secreting adrenal tumor.
Materials and Methods. Data on QoL and depression status were prospectively collected, from January 2014 to October 2016, before, early after surgery (at 1 month) and at long term (at least 6 months) in patients with unilateral PA and in a control group of patients with non-secreting adrenal tumor submitted to unilateral transperitoneal laparoscopic adrenalectomy. QoL was assessed using the Short Form 36 (SF-36) Health Survey for Physical (PCS) and Mental Component (MCS); the depression status by a 20-item depression scale (DS) questionnaire. Results. Twenty-six PA patients and 15 controls were recruited. Biochemical cure of the disease was achieved following surgery in all PA patients; hypertension was cured in 31% of cases and improved in the remaining 69% of cases. No morbidity occurred in both groups. There were no significant differences between PA patients and controls concerning demographics, preoperative PCS, MCS and DS values. In patients with PA, MCS values improved at early (42.72±13.68 vs 51.56±9.03, p=0.0005) and long term follow up (42.72±13.68 vs 51.81±7.04, p<0.0001); also DS values improved at early (15.92±11.98 vs 8.3±8.8, p=0.0002) and long term follow up (15.92±11.98 vs 4.57± 6.11, p<0.0001). In PA patients PCS values significantly improved at long term follow up (51.02±8.04 vs 55.85±5.1, p=0.013). Also in controls an improvement of MCS and DS scores was found at early and long term follow up compared to preoperative values, while no significant differences in PCS were found.
Conclusions. Both PA and non-secreting adrenal tumors affect health-related QoL, worsening MCS and DS scores. Adrenalectomy is effective in curing PA, and improving MCS and DS scores at early and long-term follow-up, in patients with PA and non-secreting adrenal tumors. In PA patient surgery also significantly improves PCS at long term follow up
Yves Citton : Impuissances. Défaillances masculines et pouvoir politique de Montaigne à Stendhal. Coll. « Critique ». 1994
No full textDelon Michel. Yves Citton : Impuissances. Défaillances masculines et pouvoir politique de Montaigne à Stendhal. Coll. « Critique ». 1994. In: Dix-huitième Siècle, n°27, 1995. L'Antiquité. p. 647
- …
