445 research outputs found
The small-polaron crossover: Comparison between exact results and vertex correction approximation
No full textWe study the crossover from quasi-free electron to small polaron in the Holstein model for a single electron by means of both exact and self-consistent calculations in one dimension and on an infinite coordination lattice. We show that the crossover occurs when both strong coupling (lambda > 1) and multiphonon (alpha(2) > 1) conditions are fulfilled leading to different relevant coupling constants (lambda) in the adiabatic and (alpha(2)) antiadiabatic region of the parameters space. We also show that the self-consistent calculations obtained by including the first electron-phonon vertex correction give accurate results in a sizeable region of the phase diagram well separated from the polaronic crossover. RI Grimaldi, Claudio/B-1641-2010; Capone, Massimo/A-7762-200
Marriage record of Diaz, Sergio and Traina, Alfonsina
No full textMarriage license for Sergio Diaz and Alfonsina Traina. John Grimaldi was the Notary Public
Le roi et l’homme : analyse linguistique de la correspondance privée de Joachim Murat
No full textLa contribution explora la correspondance privée de Joachim Murat afin d'en dégager des éléments discursifs et rhétoriques spécifiques du genre de la lettre
Isotope effects in the Hubbard-Holstein model within dynamical mean-field theory
No full textWe study the isotope effects arising from the coupling of correlated electrons with dispersionless phonons by considering the Hubbard-Holstein model at half-filling within the dynamical mean-field theory. In particular we calculate the isotope effects on the quasiparticle spectral weight Z, the renormalized phonon frequency, and the static charge and spin susceptibilities. In the weakly correlated regime U/t less than or similar to 1.5, where U is the Hubbard repulsion and t is the bare electron half-bandwidth, the physical properties are qualitatively similar to those characterizing the Holstein model in the absence of Coulomb repulsion, where the bipolaronic binding takes place at large electron-phonon coupling and it is reflected in divergent isotope responses. On the contrary in the strongly correlated regime U/t greater than or similar to 1.5, where the bipolaronic metal-insulator transition becomes of first order, the isotope effects are bounded, suggesting that the first-order transition is likely driven by an electronic mechanism, rather then by a lattice instability. These results point out how the isotope responses are extremely sensitive to phase boundaries and they may be used to characterize the competition between the electron-phonon coupling and the Hubbard repulsion. RI Capone, Massimo/A-7762-2008; Grimaldi, Claudio/B-1641-201
Sulle canzoni del ‘Convivio’
No full textIl saggio analizza i testi danteschi collegati al 'Convivio'
Amiota zaliskoi Jones & Grimaldi 2022, sp. nov.
No full textAmiota zaliskoi, sp. nov. Figures 18E–F, 19J–K, 28, 85C DIAGNOSIS: Small to medium-sized fly (ThL 0.98–1.38 mm); dark brown, glossy; facial marking small, width 0.3× length; subepandrial sclerite cantilevered, compartmentalizing surstyli; outer paraphyses laterally flattened, with short subapical dorsal hook and pair of large, symmetrical, dorsomedial spines; inner paraphysis composed of 4 asymmetrical spines, including large, prominent one with preapical tooth, extending over complex. DESCRIPTION: Small to medium-sized fly (ThL 0.98–1.38 mm), almost black, slightly glossy, grading lighter ventrally; legs yellow. Frons black, shiny ventrally, especially ventrolateral corners. Cheek small (EL/CW 9.6–13.75), yellow to brown. Facial marking small, width 0.3× length. Palp brown. Arista: Medium, plumose; longest branch D3; A.R. 0.38.; 4 long dorsal, 2 long ventral branches; D4 pointed laterad, V1 mediad; arista trunk with long microtrichia along entire length. Male genitalia: Epandrium fused at midline, this margin faintly grading into surrounding membrane. Cercus long, pendulous, nearly diamond-shaped; dorsal margins grading into surrounding membrane. Surstylus rounded; 11 prensisetae, apices blunt, closely arranged, comblike; distinctive paddle-shaped process, curving dorsomedially, extending beyond prensisetae; distal end of process with rough, textured cuticle; row of setulae along process, curving medially in semicircular pattern to midregion of surstylus. Subepandrial sclerite distinctive; cantilevered, distal corners curving downward slightly; central membrane forming septum, surrounding surstylus. Outer paraphysis long, laterally flattened, distal end rounded; very small preapical dorsal apical hook, arising on mesal surface; 2 large, heavily sclerotized, perpendicular spines present, proximal to preapical dorsal hook, with sensilla between; 4–5 sensilla in row between large spine and inner paraphysis. Inner paraphysis composed of 4 asymmetrical spines; prominent spine, large, with preapical tooth, extending over complex. Aedeagal apodeme slightly longer than wide; distal end only slightly flared, lobes distinct; distal notch very small, shallow. Hypandrium simple, of relatively uniform thickness, anterior end narrowed. Ejaculatory apodeme not studied. Head and thorax measurements: (n = 5; Am 29, 32, 529, 638, 1168) FL/ FW 0.77 (0.70–0.85), EL/EW 1.29 (1.17–1.40), EL/ CW 11.2 (9.6–13.75), FML/FMW 0.27 (0.24–0.30), PR /RR 0.58 (0.45–0.77), ThL 1.25 (0.98–1.38 mm). TYPE MATERIAL: Holotype: male: NEW YORK: Tompkins Co., Texas Hollow, [42.386486, -76.773090], VII/26/83, D. Grimaldi and L.L Pechuman, flying about head, Am 32, [specimen glued to paper point, dissected]. Deposited in the American Museum of Natural History (AMNH). Paratypes: NEW YORK: Tompkins Co., Texas Hollow, VII/26/83, D. Grimaldi and L.L Pechuman, flying about head, 3♂ (Am 21, 29*, 30*, AMNH). OTHER MATERIAL EXAMINED: Canada: Ontario: Algonquin Provincial Park, Swan Lake Station, Scott Lake Survey, 1995-05-29 through 1995-06-16, leg. S.A. Marshall, A transect bracket. Pans on debarked snag, 1♂ (Am 576, DEBU). Lambton Co., Port Franks, 1996-08-02, leg. J. Skevington, 1♂ (Am 638*, DEBU). Quebec: Old Chelsea, 1959-09-29, leg. J. R. Vockeroth, 1♂ (Am 1437*, CNC); 1150′, 1966-07-05, leg. D.D. Monroe, 1♂ (Am 1258*, CNC); 1150′, 1966-07-08, leg. D.D. Monroe, 1♂ (Am 1259*, CNC); 1150′, 1966-08-09, leg. D.D. Monroe, 1♂ (Am 1261*, CNC); Old Chelsea, King Mt., 1969-08-13, leg. B. V. Peterson, 1♂ (Am 1582*, CNC); Old Cheslea, Summit King Mtn., 1965-06-20, leg. D.M. Wood, 2♂ (Am 1462*, 1541*, CNC); Summit King Mt. Old Chelsea, 1980- 06-23, leg. K.N. Barber, 1♂ (Am 529*, DEBU). USA: New York: Monroe Co., Rochester, Highland Pk., 43.132600, -77.602784, 2018-09-17, leg. John Jaenike, 1♂ (Am 1168*, AMNH). North Carolina: Wayah Bald, 5300′, 1957-07-14, leg. J.G. Chillcott, “ Paratype,” [never published], 1♂ (Am 1375*, CNC). ETYMOLOGY: Named for Edward Zalisko (1958–), outstanding teacher and professor of biology at Blackburn College in Carlinville, Illinois. In appreciation for introducing the first author to phylogenies and evolution while he was an undergraduate at Blackburn. Zalisko once said in class, “I am the world’s authority on something that absolutely nobody cares about!” a sentiment now understood by the first author. DISTRIBUTION: Amiota zaliskoi is found in the Great Lakes region, but one record as far south as North Carolina is known. COMMENTS: This species exhibits the characteristic behavior of attraction to the eyes and face common in many Amiota.Published as part of Jones, Lance E. & Grimaldi, David A., 2022, Revision Of The Nearctic Species Of The Genus Amiota Loew (Diptera: Drosophilidae), pp. 1-181 in Bulletin of the American Museum of Natural History 2022 (458) on pages 49-50, DOI: 10.1206/0003-0090.458.1.1, http://zenodo.org/record/740002
Instrumentation and measurement in medical, biomedical, and healthcare systems
No full textProper measurement is crucial in the medical, biomedical, and healthcare fields because it forms the basis of medical diagnosis, prognosis, and evaluation. In fact, it is known that »measuring is the cornerstone of medical research and clinical practice» [1]. Medical professionals such as doctors or clinical laboratory scientists must have confidence in the results reported by their instruments or their measurement methods to make the correct decision for their patient. While in many industries incorrect measurements would simply lead to customer dissatisfaction or loss of money, in the medical field incorrect measurements could be fatal and lead to loss of life. Hence, we can say that proper instrumentation and measurement is vital in the medical field. In this article, we take a look at the latest biomedical topics from the perspective of Instrumentation and Measurement (I&M), and we summarize the latest medical I&M topics published in IEEE Transactions on Instrumentation and Measurement (TIM), to familiarize medical practitioners and researchers in how to achieve a proper medical I&M paper. We also briefly introduce the IEEE Instrumentation and Measurement Society's (IMS) main medical conference, the IEEE Symposium on Medical Measurements and Applications (IEEE MeMeA), which promotes the I&M aspects of the medical field in general, and we present guidelines on the I and M aspects that are useful for authors with primarily biomedical backgrounds who would like to publish in IEEE TIM
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