6,983 research outputs found
Photoelectron spectroscopy for surface analysis: X-ray and UV excitation
No full textPodeu consultar el llibre complet a: http://hdl.handle.net/2445/32166This article summarizes the basic principles of photoelectron spectroscopy for surface analysis, with examples of applications in material science that illustrate the capabilities of the related techniques
Miradas Al Sur: a criação mitológica do bairro sur na obra de Jorge Luis Borges
No full textDissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Comunicação e Expressão, Programa de Pós-Graduação em Literatura, Florianópolis, 2014Este estudo investiga como Jorge Luis Borges constrói o Sur como espaço mítico, em seus três primeiros livros de poesia. Para tanto, analisou-se de que forma a representação de tal espaço torna-o simbólico e, posteriormente, mítico, tanto no conjunto da obra do autor, como também, a partir desse movimento individual de Borges, no imaginário coletivo da cidade. Estudou-se ainda como a memória própria e o imaginário criaram espaços afetivos, que permeiam a totalidade dos textos do autor.Abstract: This study investigates how Jorge Luis Borges builds Sur neighborhood as mythic space in his first three books of poetry. To this end, we analyzed how the representation of such a space make of it a symbolic and later a mythical space, both in the overall work of the author, but also that individual movement of Borges that achieve the collective imagination of the city. Still we have studied how the personal memory and the imagery is able to create emotional spaces, which constitute the totality of texts by the author
El Barrio, Espacio Social y Teatro Chicano: Barrioización y Barriología en la Dramaturgia Chicana
No full textabstract: En contexto del desarrollo urbano culturalmente acrítico, el cual con la gentrificación amenaza el bienestar del barrio y sus habitantes, esta disertación interpreta la dialéctica barrioización y barriología como atmósfera dramática en la dramaturgia chicana. Como tropo de supervivencia social y ontológica en la producción cultural chicana, la recurrencia literaria del barrio también queda reflejada en la temática y las formas de numerosas obras de teatro chicano. De tal modo, el análisis de la conciencia espacial chicana en Bernabé (1971) y Heroes and Saints (1994) revela la significancia de un sentido de lugar colectivo y sitúa esta interpretación dramática del barrio en torno al matiz ideológico de la evolución de la conciencia espacial chicana. Manifestada como una dialéctica entre muerte y vida social y ontológica, la representación y representatividad del barrio en La trampa sin salida (1973), Water and Power (2009) y A Drunkard’s Tale of Melted Wings and Memories (2016) ilustra el efecto dramático de la dialéctica entre barrioización y barriología. Mientras algunos estudios precedentes a este han explorado la espacialidad chicana y el significado sociocultural del barrio, esta disertación es la primera en demonstrar concomitantemente la función temática y semiótica del barrio en la configuración de la atmósfera dramática en el teatro chicano. Más aún, la intersección entre barrio, espacio social y teatro no solo revelan la significancia semiótica de la atmósfera dramática, si no que también sostienen la urgencia de fomentar la (re)producción socioespacial urbana históricamente informada y culturalmente crítica.Dissertation/ThesisDoctoral Dissertation Spanish 201
Eleutherodactylus aracamuni Barrio-Amorós & Molina, 2006, sp. nov.
No full text<i>Eleutherodactylus aracamuni</i> sp. nov. <p>(Figs. 1, 2)</p> <p> <b>Holotype</b>. MHNLS 17042; field number CG 195. A subadult or adult male from the summit of Cerro Aracamuni (01° 28’ 36’’ N; 65° 50’ 07’’ W), 1493 m, Estado Amazonas, Venezuela, collected by Carmen García on 6 November 1992.</p> <p> <b>Paratype</b>. MHNLS 17048, a 14.8 SVL juvenile of undetermined sex with same data as the holotype.</p>Published as part of <i>Barrio-Amorós, César L. & Molina, César R., 2006, A new Eleutherodactylus (Anura, Brachycephalidae) from the Venezuelan Guayana, and redescription of Eleutherodactylus vilarsi (Melin), pp. 1-20 in Zootaxa 1302</i> on page 3, DOI: <a href="http://zenodo.org/record/173647">10.5281/zenodo.173647</a>
Laguna province (Philippines), Pansol barrio road
No full textBarrios S & W of Pila, Pescador's area, Laguna. Jan. 20 '34.Pansol barrio road. 5.6 1/25 GGrayscalePendleton nitrate negative, Box 83 of 38
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Mexican Americans in a Dallas Barrio
No full textThis book vividly describes day-to-day barrio life in Dallas. Achor’s portrayal of the residents challenges stereotypes of traditional Mexican American culture and southwestern barrio life.Andrew W. Mellon Foundation, as part of the Humanities Open Book Program funded jointly by the National Endowment for the Humanities and the Andrew W. Mellon Foundation.Preface to the Fifth Printing -- Preface -- Introduction. Entering the Barrio -- 1. La Bajura: The Barrio Setting -- 2. Dallas, Texas: The City as Context -- 3. Growing Up and Growing Old: Some Notes on the Life Cycle -- 4. Crossing the Bridge: Institutions Linking La Bajura to Dallas -- 5. Varying Values: Adaptation and Change in the Barrio -- 6. Challenge and Response: Interactions With the Urban Ecosystem -- Epilogue. Going Home -- Appendix A. A Review of the Literature and
Some Theoretical Concerns -- Appendix B. The Formal Questionnaire -- References -- Index.This title from the Open Arizona collection is made available by the University of Arizona Press and University of Arizona Libraries. If you have questions about this title, please contact the UA Press at https://uapress.arizona.edu/contact
Truth without standard models: some conceptual problems reloaded
No full textA theory of truth is usually demanded to be consistent, but w -consistency is less frequently requested. Recently, Yatabe has argued in favour of w-inconsistent first-order theories of truth, minimising their odd consequences. In view of this fact, in this paper, we present five arguments against w-inconsistent theories of truth. In order to bring out this point, we will focus on two very well-known w-inconsistent theories of truth: the classical theory of symmetric truth FS and the non-classical theory of naïve truth based on ᴌukasiewicz infinitely valued logic: PAᴌT.Fil: Barrio, Eduardo Alejandro. Instituto de Investigaciones Filosóficas - Sadaf; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Da Ré, Bruno. Instituto de Investigaciones Filosóficas - Sadaf; Argentin
Phyllomedusa neildi Barrio-Amorós, 2006, sp. nov.
No full textPhyllomedusa neildi sp. nov. (Fig. 1, 2) Holotype: MBUCV 6684, adult male, from the vicinity of Murucusa, Municipio Petit (11 º 02’ N, 69 º 35 ’ W), 550 masl, spurs of Sierra de San Luís, Estado Falcón, Venezuela, collected by C. Morón in August 1994. Paratypes: CVULA 6500, 6502, adult males; CVULA 6501, 6503, adult females; EBRG 4754 – 5, adult males; MBUCV 6685 – 6, adult males (6685 cleared and stained). All with the same data as the holotype. Referred material: MHNLS 1503 Estado Falcón: Curimagua, distrito Petit. Etymology: The specific name is a patronym for Andrew Neild, lepidopterologist associated with the Natural History Museum of London (UK) in recognition of his productive work in Venezuela (Neild 1996). Diagnosis: A member of the genus Phyllomedusa sensu stricto (Gonçalves da Cruz 1990; Faivovich et al. 2005) and of the Phyllomedusa tarsius group (defined below), with the following combination of characters: (1) moderate size (= 59.8 in males; = 73.3 in females); (2): snout of males strongly sloping in lateral profile, rounded to truncate in females; (3) Finger I longer than, and opposable to FII; (4) parotoid glands not apparent; (5) dentigerous processes of vomers present; (6) calcars and dermal appendages absent; (7) palpebral membrane not reticulated; (8) iris golden with black reticulations in life; (9) dorsal coloration green; concealed surfaces of hind limbs pink with white transverse bars or spots. Comparison with other species: Compared with other species in the Phyllomedusa tarsius group, P. neildi is similar to P. trinitatis, P. tarsius and P. venusta, but can be easily distinguished by its significantly smaller size; SVL in Phyllomedusa trinitatis (Fig 3) males is from 70 to 81 mm (= 76.3); in females is from 90 to 95.5 (= 92 mm) [own data]; SVL in Phyllomedusa tarsius (Fig 4) ranges in males from 81 to 90 mm (= 84.1 mm); in females from 99.1 to 111.8 mm (= 104.0 mm) (Duellman 1974); SVL in Phyllomedusa venusta ranges in males from 69 to 86.3 mm (= 77.4 mm); the mean in females is 97.7 mm (Duellman and Trueb 1967, and own data combined). On the other hand, P. neildi has the concealed surfaces of the hind limbs coloured with white transverse bars or spots on a pink background (absent or very ill defined in other species). Phyllomedusa venusta has long and prominent parotoid glands (absent or not well developed in P. neildi). Males of P. coelestis, a rare species in the upper Amazon of Peru and Ecuador, are similar in size to those of P. neildi (53.3–64.8 mm; Duellman and Mendelson III 1995), but P. neildi also differs from P. coelestis in coloration of the flanks and concealed surfaces of hind limbs. Phyllomedusa boliviana and P. c a m b a from the south western Amazon Basin lack a golden iris with black reticulation and have conspicuous parotoid glands. Description of the type series: Phyllomedusa of moderate size (males 55.2–63.8, 59.8; females 70.5–76, 73.2). Head (Fig. 5 B) longer than wide; top of head flat; snout short, oval in males, rounded in females in dorsal view; sloping in males, and rounded to truncate in females in lateral profile; canthus rostralis rounded; loreal region slightly concave; lips thin, not flared; nostrils not protuberant, directed laterally; internarial region flat; eyes protuberant; palpebral membrane transparent; parotoid glands indistinct; supratympanic fold apparent only in females, barely developed; tympanum vertically oval, distinct, except dorsally, hidden by supratympanic fold. Tongue enormous, round or cordiform, ½ to 2 / 3 free distally; maxillary teeth present; dentigerous processes of vomers small, transverse between choanae, separated by a distance equal to 2 / 3 of one process; each bearing 2–6 teeth (usually 4–6); vocal slits absent; vocal sac single, medial, not distinct. Axillary membranes absent; arms slender, forearms moderately robust in males; ulnar fold indistinct; indistint row of protuberances, in some specimens; relative length of fingers I 4 m, around ponds. Amplectant pairs were observed in vegetation at various heights above water, but never in the water, as Langone et al. (1985) observed for P. i h e r i n g i. The same night, while in some lagoons many adults were in reproductive activity, in other pools only a few males were calling sporadically. Other species of anurans typical of savannas and xeric habitats of northern South America that were found in the pond where P. neildi was breeding include Chaunus marinus, C. granulosus complex, Dendropsophus microcephalus, D. minutus, Hypsiboas crepitans, Scinax “xsignatus”, Engystomops pustulosus, Pleurodema brachyops, and Leptodactylus insularum. Vocalization: Three types of notes can be recognized. In the audiospectrogram (Fig 7), each call corresponds to a different individual, but all were recorded at the same time (21: 30 h) from a single position (air temperature 22 °C). The first (Fig 7 A) consist of a single note of 104 ms of length and 707 Hz of dominant frequency (fundamental frequency of 168 Hz). The second (Fig 7 B) is a series of eight notes of 871 ms, with a dominant frequency of 736 Hz (fundamental 140 Hz). The third (Fig 7 C) was the most common (that night) and consists of two notes, one principal with a duration of 164 ms and a dominant frequency of 843 Hz, (fundamental 252 Hz), and a secondary of 104 ms. The length of the complete sequence is 302 ms. Rivero & Esteves (1969) showed an audioespectrogram of the call of Phyllomedusa trinitatis, but they did not described it. In their spectrogram, there is a principal note, followed by five secondary notes; as can be extrapolated, the dominant frequency is approximately at 800 Hz, while the fundamental is at 500 Hz; the duration of the sequence is of 1.1 sec. Phyllomedusa neildi can emit up to fifteen consecutive secondary notes. Kenny (1966) described a distress call for P. trinitatis that was not heard in P. n e i l d i. Calls of the Phyllomedusa tarsius group species have been never well analyzed. We cannot conclude any important difference among them. The call of P. c a m b a (out of the P. t a r s i u s group in this paper) has also a dominant frequency of 860 Hz.Published as part of Barrio-Amorós, César L., 2006, A new species of Phyllomedusa (Anura: Hylidae: Phyllomedusinae) from northwestern Venezuela, pp. 55-68 in Zootaxa 1309 on pages 57-62, DOI: 10.5281/zenodo.17382
Will Quantum Computers Scale without Inter-Chip Comms? A Structured Design Exploration to the Monolithic vs Distributed Architectures Quest
No full textBeing a very promising technology, with impressive advances in the recent years, it is still unclear how quantum computing will scale to satisfy the requirements of its most powerful applications. Although continued progress in the fabrication and control of qubits is required, quantum computing scalability will depend as well on a comprehensive architectural design considering a distributed multi-core approach as an alternative to the traditional monolithic version, hence including a communications perspective. However, this goes beyond introducing mere interconnects. Rather, it implies consolidating the full communications stack in the quantum computer structure. In this paper, we propose a double full-stack architecture encompassing quantum computation and quantum communications, which we use to address the monolithic versus distributed question with a structured design methodology. For that, we revisit the different quantum computing layers to capture and model their essence by highlighting the open design variables and performance metrics. Using behavioral models and actual measurements from existing quantum computers, the results of simulations suggest that multicore architectures may effectively unleash the full quantum computer potential.Accepted Author ManuscriptQCD/Almudever La
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