4,960 research outputs found
We are who we are. 12 inclusions 12 transformations
No full textDocumento que ayuda a la difusión del material educativo Sánchez Sáinz, M., Penna Tosso, M. y de la Rosa Rodríguez, B. (2015). Somos como Somos 12 inclusiones 12 transformaciones. TE 350, 20-21Depto. de Estudios EducativosFac. de EducaciónFALSEpu
"La rima facile, la vita difficile": Sandro Penna e l'epifania del desiderio
No full textAnche se di aspetto chiaro e adamantino, la poesia di Sandro Penna riflette un’opacità di fondo, sotterranea ma radicale, da cui filtra il complesso umore del poeta. Essa è, infatti, il diagramma di un equilibrio emozionale saturnino, vellicato da mutevoli influssi, euforie e mestizie. Il costo della poesia è per Penna un continuo sforzo acrobatico, una ostinata coazione a ripetere i frammenti del barthesiano “discorso amoroso”, le varianti di un’ossessione che cova sotto la superficie della
leggerezza
Sandro Penna e la geografia del desiderio
No full textNon c’è stato probabilmente poeta, nel Novecento italiano, che al pari
di Sandro Penna abbia saputo annettere al teatro della città lo stesso carattere
idilliaco o, anche – al limite – escapistico, che il poeta moderno suole
attribuire per istinto e per nostalgia alla sfera perduta della natura. Penna
si colloca di fatto al di fuori del canone letterario e poetico costituitosi
nell’Italia novecentesca (lo stesso Cesare Garboli, suo acuto e «affezionato»
interprete, lo classifica come un “postumo” della linea pascoliana), ma proprio
perché si pone anche al di fuori della sfera piccoloborghese, in virtù di
una incrollabile diversità umana, oltre che culturale. A Roma, così come in
buona parte nella nativa Perugia, Penna va ricavandosi una sorta di nicchia
lirico-estetica e, ostentando un atteggiamento di inattaccabile serenità, va
creandosi un microcosmo pullulante di figure, profili, ambientazioni dolci,
gentili, morbidi, fragranti, ieratici, da compulsare a suo uso e consumo
esclusivo, privatamente, avidamente, ininterrottamente
Trichacis kaulbarsi Arias-Penna & Masner, new species
No full textTrichacis kaulbarsi Arias-Penna & Masner, new species Figures 10 F; 11 A– 11 G Female. Body length: 1.60 mm (holotype). Black; A 1 –A 10 brown and mandible yellow with apex brown; leg yellow; coxa dark brown; fore wing infuscate. Head, in dorsal view, 1.9 times as wide as long; EH LOL; antennal clava 4 -segmented; A 1 not reaching vertex dorsal margin; A 2 –A 5, A 8 –A 10 longer than wide; A 6 –A 7 as long as wide; base of mandible smooth; frons above interantennal process and torulus with four deeply marked transverse striae; interantennal process smooth and surpassing ventral border of torulus; clypeus exposed; clypeal margin truncate; gena smooth; lateral region of vertex smooth between posterior ocellus and hyperoccipital carina, and with well-marked longitudinal striae between hyperoccipital carina and occipital carina; temple projection absent; hyperoccipital carina complete, distance between posterior ocellus and hyperoccipital carina shorter than posterior ocellus diameter. Mesosoma slightly arched; antero-admedian line present; notaulus absent; anterior region of mesoscutum coriaceous; mesoscutum posteromedially acute; parapsidal line present; central pronotal area smooth; specialized area of mesoscutellum circular and elevated; mesopleural carina incomplete (length of mesopleural carina/length of mesopleuron = 0.29); fore wing distinctly surpassing apex of metasoma. Metasoma moderately elongate; combined length of T 3 –T 6 <T 2; T 1 shorter than wide; T 2 longer than wide; T 3 –T 6 wider than long; anteromedial area of T 2 smooth and flattened; T 3 –T 6 densely covered by deep punctuation; T 6 subtriangular. Male. Body length: 1.4 mm (allotype); 1.60 mm (paratype); mean ± SD = 1.50 ± 0.14 mm. Similar to female except the following: antenna filiform; A 1 yellow; A 2 –A 10 brown; leg including coxa yellow; A 8 as long as wide; T 1 shorter than wide; T 2 longer than wide; T 3 –T 5 wider than long; T 3 –T 7 densely covered by deep punctuation. Etymology. Named after M. Kaulbars, the collector of the holotype and allotype. Diagnosis. Trichacis kaulbarsi and T. colombiana have notaulus absent. However, T. kaulbarsi has a smooth interocellar area and a complete hyperoccipital carina. Material examined. Holotype: 1 Ƥ, MEXICO, SLP 400 km W, Xilitla, 1700 m, June 12 1983, M. Kaulbars (CNCI); allotype: 1 3, with the same data as holotype (CNCI); paratype: 1 3, with same data as holotype but caught in June 12 –August 6 1983, FIT, S. Peck (ICN). Holotype is deposited in CNCI.Published as part of Arias-Penna, Tania Milena, Masner, Lubomir & Delsinne, Thibaut, 2012, Revision of the Neotropical species of Trichacis Foerster (Hymenoptera: Platygastroidea: Platygastridae), with description of 24 new species, pp. 1-56 in Zootaxa 3337 on pages 23-26, DOI: 10.5281/zenodo.28132
Population structure in the Penna model
No full textNumerical simulations of growing population, based on the Penna model, are presented. We consider biological ageing as a result of the accumulation of mutations in the genotype. We present an example of simulated population structure and compare it with that of a real population. We also discuss the role of bad mutations threshold parameter T in the Penna model, to reproduce a smooth transition from the oversimplified logistic model (T --> ∞) to the Penna model
Higher order Linking Numbers, Curvature and Holonomy
No full textA differential geometric approach to Milnor-Massey higher order linking numbers
for generic links is devised, via Chen's theory of iterated path integrals. Massey linking
numbers arise from curvature forms of nilpotent "topological" connections, determined
by the link structure, and interpreted in terms of intersection theory, leading to a fairly
easy computation thereof. A version of the Turaev-Porter theorem expressing equality of
Milnor and Massey linking numbers is also exhibited along the same lines, by computing
suitable flat connection parallel transport operators in two different ways
Penna, o l'impossibilità della continuità
No full textIl costo della poesia è per Penna un continuo sforzo acrobatico, una infinita coazione a ripetere
le figure e i luoghi e i frammenti del barthesiano “discorso amoroso”, che si riflette
sintomaticamente nell'artefatto splendore della forma, apparentemente naturale. È proprio a
causa di questa intima, strutturale divisione, di questa inesatta condizione, sempre di là
dall'essere rintuzzata, colmata, risanata, che il poeta si ritrova nella continua impossibilità di
completare il proprio “discorso amoroso” e naufraga senza soluzione di continuità nella vastità
del suo immaginario omo-erotico. Nella sua personale “odissea” estetico-emotiva,
Penna trova di continuo soluzioni parziali, ovvero uniche e singolative, mai durevoli e bastevoli
al suo desiderio; il suo istinto poetico non conosce cioè soddisfazione o appagamento, se non
nella contemplazione inesausta e ininterrotta dell'amorosa visione, in un viaggio sensuale e
agrodolce nella vasta e varia costellazione dell'amor profano.
Questo motivo di ripetizione, di regressione incontrollata nella forma particolare (seppure
archetipica) del kouros, del fanciullo, è una coazione che Bigongiari chiama “immillamento”
del desiderio, scomposizione incontrollata di un solo oggetto in una congerie di filiazioni
figurative, di trasfigurazioni dell'inconscio lirico-estetico. La poesia di Penna genera da una
condizione di sospensione del desiderio, definita da alcuni critici “punto di
svuotamento” o, come dice Bigongiari sottolineandone l'accezione spirituale, “ecstasis”. Da
questo istante, topico, di “sopore”, si produce quello stato di vuoto, quel punctum dolens che
vuole essere riempito dalla rivelazione, dall'“epifania del desiderio”
Trichacis punctata Arias-Penna & Masner, new species
No full textTrichacis punctata Arias-Penna & Masner, new species Figures 16 F; 17 A– 17 E Female. Body length: 2.30 mm (holotype). Black; mandible yellow with apex brown; A 1 yellow; A 2 –A 10 brown; fore and mid legs yellow; hind leg with tarsi and apices of femur and tibia brown, otherwise yellow; hind coxa dark brown; fore wing infuscate in posterior 2 / 3, with darker and lighter patterns in basal 1 / 3. Head, in dorsal view, 2.2 times as wide as long; EH LOL; antennal clava 4 -segmented; A 1 not reaching vertex dorsal margin; A 2 –A 4, A 6, A 10 longer than wide; A 5, A 7 –A 9 as long as wide; base of mandible smooth; frons above torulus with transverse striae; interantennal process reaching, but not surpassing, ventral border of torulus; clypeus exposed; clypeal margin truncate; gena striate; vertex with scattered punctures laterally; temple projection absent; hyperoccipital carina absent; length between posterior ocellus and occipital carina line> OOL. Mesosoma arched; antero-admedian line present; notaulus anteriorly incomplete; lateral notaular area smooth; inter-notaular area with anterior 1 / 3 coriaceous; posteromedial region of inter-notaular area convex; parapsidal line present; central pronotal area smooth; specialized area of mesoscutellum heart-shaped; median projection of specialized area of mesoscutellum rectangular; mesopleural carina incomplete (length of mesopleural carina/length of mesopleuron = 0.50); fore wing distinctly surpassing apex of metasoma. Metasoma elongate; combined length of T 3 –T 6 <T 2; T 1 shorter than wide; anteromedial area of T 2 smooth and flattened; T 2 longer than wide; T 3 –T 5 densely covered by deep punctuation; T 6 densely covered by deep punctuation along its anterior border. Male: Unknown. Etymology. The name refers to the punctures present on vertex. Diagnosis. Trichacis punctata and T. acarinata are characterized by the absence of hyperoccipital carina. T. punctata can be distinguished by the combination of the following characters: combined length of T 3 –T 6 <T 2; posteromedial region of inter-notaular area convex; fore wing distinctly surpassing apex of metasoma. Material examined. Holotype: 1 Ƥ, BRAZIL, S. Bocaina, S. José Barre S.P., 1650 m, November 1968, M. Alvarenga (CNCI). Holotype is deposited in CNCI.Published as part of Arias-Penna, Tania Milena, Masner, Lubomir & Delsinne, Thibaut, 2012, Revision of the Neotropical species of Trichacis Foerster (Hymenoptera: Platygastroidea: Platygastridae), with description of 24 new species, pp. 1-56 in Zootaxa 3337 on pages 34-37, DOI: 10.5281/zenodo.28132
Trichacis dianae Arias-Penna & Masner, new species
No full textTrichacis dianae Arias-Penna & Masner, new species Figures 8 C– 8 F; 9 A Female. Body length: 1.90 mm (holotype); 1.50–2 mm (paratypes, n= 20); mean length ± SD = 1.83 ± 0.13 mm. Black; A 1 –A 5 yellow; A 6 –A 10 brown; mandible yellow with apex brown; fore and mid legs yellow; hind leg brown but with apices of femur and tibia darker; coxae dark brown; fore wing infuscate. Head, in dorsal view, 2.7 times as wide as long; EH <IOS; interocellar area with fine coriaceous sculpture; OOL <LOL; antennal clava 4 -segmented; A 1 not reaching vertex dorsal margin; A 2 –A 3, A 5, A 10 longer than wide; A 4, A 6 –A 7 as long as wide; A 8 –A 9 wider than long; base of mandible smooth; frons above torulus and interantennal process with delicate transverse striae and coriaceous sculpture; interantennal process striate and surpassing ventral border of torulus; clypeus exposed; clypeal margin convex medially; gena striate; lateral area of vertex weakly coriaceous between posterior ocellus and hyperoccipital carina and with well-marked longitudinal striae between hyperoccipital carina and occipital carina; temple projection absent; hyperoccipital carina almost complete: in dorsal view, hyperoccipital carina surpassing level of imaginary line connecting eye inner margin to posterior cephalic margin; distance between posterior ocellus and hyperoccipital carina equal or slightly longer than posterior ocellus diameter. Mesosoma arched; antero-admedian line present; notaulus anteriorly incomplete; lateral notaular area with coriaceous sculpture along its anterior margin; inter-notaular area coriaceous in its basal 1 / 3 and smooth in its posterior 2 / 3; posteromedial region of inter-notaular area convex; parapsidial line present; central pronotal area smooth; specialized area of mesoscutellum heart-shaped, median projection of specialized area of mesoscutellum triangular; mesopleural carina complete; fore wing distinctly surpassing apex of metasoma. Metasoma elongate; combined length of T 3 –T 6 <T 2; T 1 as wide as long; T 2 longer than wide; T 3 –T 6 wider than long; anteromedial area of T 2 smooth and concave; anterior pit of T 2 with longitudinal striae; T 3 smooth along its anterior margin and densely covered by shallow punctuation; T 4 –T 6 densely covered by deep punctuation; T 6 subtriangular. Male. Body length: 2 mm (allotype); 1.70–1.85 mm (paratypes, n= 4); mean length ± SD = 1.82 ± 0.12 mm. Similar to female except the following: antenna filiform and yellow; A 2 wider than long; A 4, A 6 –A 10 longer than wide; T 1 as wide as long; T 3 –T 7 densely covered by deep punctuation. Etymology. The species is named in honor of the entomologist Diana Carolina Arias-Penna. Diagnosis. Trichacis dianae and T. procera have complete mesopleural carina. T. dianae differs by the combination of the following characters: OOL <LOL; presence of longitudinal striae on vertex; anterior pit of T 2 with longitudinal striae; smooth and concave T 2 anteromedial area. Material examined. Holotype: 1 Ƥ, VENEZUELA, Lara, Yacambu, N. P., 1200 m, May 10 1981, H. Townes (CNCI); allotype: 1 3, with same data as holotype but caught May 7 1981 (CNCI); paratypes: COLOMBIA: 1 3, Magdalena, 11 º 10´N 74 º 8´W, 800 m, April 26–30 1973, J. Helava (CNCI); ECUADOR: 1 Ƥ, Sucumbios, Sacha Lodge, 0º 30´S 76 º 30´W, 270 m, August 16–23 1994, MT, P. Hibbs (CNCI); 1 Ƥ, Sucumbios, Río Napo, Sacha Lodge, 0º 30´S 76 º 30´W, 270 m, July 25 –August 3 1994, MT, Peter Hibbs (CNCI); 1 Ƥ, Napo, Limoncocha, 250 m, June 15–28 1976, S. & J. Peck (CNCI); VENEZUELA: 2 3, 3 Ƥ with the same data as allotype (CNCI); 1 3, 6 Ƥ, with same data as holotype (CNCI); 4 Ƥ, with same data as holotype but caught May 13 1981 (CNCI), 2 Ƥ Merida, Merida–Sta. Rosa, ca. 1800 m, May 11 1981. L. Masner (CNCI); 1 Ƥ, Zulia El Tucuco, 200 m, Primary rain for., April 1981, L. Masner (CNCI); 1 Ƥ, Aragua, Parque Nac. H. Pittier, Rancho Grande env., 1100 m, April 10–14 1994, YPT, L. Masner (ICN). Holotype is deposited in CNCI.Published as part of Arias-Penna, Tania Milena, Masner, Lubomir & Delsinne, Thibaut, 2012, Revision of the Neotropical species of Trichacis Foerster (Hymenoptera: Platygastroidea: Platygastridae), with description of 24 new species, pp. 1-56 in Zootaxa 3337 on pages 19-21, DOI: 10.5281/zenodo.28132
Near-infrared photoluminescence of erbium tris(8-hydroxyquinoline) spin-coated thin films induced by low coherence light sources
No full textCopyright 2007 AIP Publishing LLC. This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Applied Physics Letters [91, 021106 (2007)] and may be found at
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