180,954 research outputs found
In memoria di César Barrientos. Riflessioni attuali su un passo di Cesare Beccaria a proposito dei delitti di prova difficile
No full textIl saggio offre una lettura attualizzata di un capitolo dell'opera di Cesare Beccaria "Dei delitti e delle pene". Lo scritto è confluito nel volume dedicato alla memoria del dr. Cesar Barrientos, già presidente del Tribunal supremo guatemalteco
Associated costs of mitigation-driven translocation in small lizards
No full textBarrientos, Rafael, Megía-Palma, Rodrigo (2021): Associated costs of mitigation-driven translocation in small lizards. Amphibia-Reptilia 42 (3): 275-282, DOI: 10.1163/15685381-bja10040, URL: http://dx.doi.org/10.1163/15685381-bja1004
CORZO, Venancio y Onésimo BARRIENTOS
No full textLetters from Gen. Plutarco Elías Calles to Francisco R. Serrano, Secretary of War and Navy and to Gen. Manuel M. Mendoza, Commander of Military Operations in Chiapas referring Venancio Corza, Onésimo Barrientos and Pompeyo Cárdenas, representatives of the rebel groups in the region to negotiate their surrender. Letter from Gen. Manuel M. Mendoza, Commander of Military Operations in Chiapas to Gen. Plutarco Elías Calles informing that he has granted guarantees to rebel representatives in the region, but they could not do any negotiations, which is why he has given them an ultimatum. / Cartas del Gral. PEC al Gral. Francisco R. Serrano, Secretario de Guerra y Marina y al Gral. Manuel M. Mendoza, Jefe de las Operaciones Militares en Chiapas, recomendando a Venancio Corzo, Onésimo Barrientos y Pompeyo Cárdenas, representantes de los grupos rebeldes de la región para tratar su rendición. Carta del Gral. Manuel M. Mendoza, Jefe de Operaciones Militares en Chiapas a Gral. PEC. Le informa que ha dado garantías a los representantes de los rebeldes de la zona, pero que nada han podido negociar, por lo que les ha impuesto un ultimátum
Appropriate Similarity Measures for Author Cocitation Analysis
No full textWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Base de expertise directiva (modelo de descriptores, identificación de componentes, orígenes, desarrollo, utilización y valoración en las funciones directivas):
No full textFil: Barrientos, Jorge Washington. Universidad de Buenos Aires. Facultad de Ciencias Económicas. Buenos Aires, Argentina.Fil: Gómez Fulao, Juan Carlos. Universidad de Buenos Aires. Facultad de Ciencias Económicas. Buenos Aires, Argentina.Fil: Cardozo, Alejandro Pablo. Universidad de Buenos Aires. Facultad de Ciencias Económicas. Buenos Aires, Argentina.Fil: Casparri, María Teresa. Universidad de Buenos Aires. Facultad de Ciencias Económicas. Buenos Aires, Argentina.Fil: Meléndez, Horacio R.. Universidad de Buenos Aires. Facultad de Ciencias Económicas. Buenos Aires, Argentina
Melanoplus parvus Barrientos-Lozano & Rocha-Sanchez, n. sp.
No full textMelanoplus parvus Barrientos-Lozano & Rocha-Sánchez n. sp. (Figs. 27 a–f– 28 a–c; 30 a–e; 31 a–c, 32 a) Type material (material examined).— Holotype 3 and allotype Ƥ. Mexico, Coahuila, El Cascajal, Los Lirios, Arteaga, 1942 m, Lat. 25 ° 22.591 ’’N, Long. 100 ° 46.17 ’’W, 26.IX. 2009, Barrientos-Lozano L., Méndez-Gómez B. R. & Rocha-Sánchez A. Y. Paratypes, Coahuila.— 2 3, 1 Ƥ, same data as holotype, coll. L Barrientos-Lozano-ITCV; 1 Ƥ, Jamé, road (rd.) Nuncio-Rayones, 2394 m, Lat. 25 ° 21.33 ”N, Long. 100 ° 35.588 ”W, 27.IX. 2009, Barrientos-Lozano L., Méndez-Gómez B. R. & Rocha-Sánchez A. Y, coll. L. Barrientos-Lozano-ITCV. Diagnosis.— M. par vus n. sp., may be distinguished from congeneric species as follows: very unique elongated and stylized cerci (Figs 27 c, d; 28 b), as long as the supra-anal plate, broad basally, incurved and narrowing about mid portion, then widening, distally the upper margin bent conspicuously upwards and inwards; the upper margin rounded laterally and, in dorsal view, the ventral acute. The supra-anal plate triangular, proximally broad, furculae obsolete, side margins almost straight, medio-longitudinal sulcus broad proximally, moderately deep, about ¾ the length of the supra-anal plate; the subgenital plate subconical, distinctly tuberculate apically (Figs. 27 d; 28 c). M. par vus n. sp., presents certain similarities with M. strumosus Morse, i.e., in general appearance, size and cerci (Fig. 29 a–c). However, we are not comparing M. par vus n. sp. with M. strumosus because the latter species occurs only in southeastern United States, as all other members of the Puer Group, to which M. strumosus is assigned. Furthermore, characters that define the Puer Group are not clearly established. Description of male.— A small species, average 15 mm in length. General body color brown, head medium size, face whitish-cream, antennae brownish, eyes relatively large for its size and prominent, interocular space rather wide, fastigium of vertex gently declevent, enlarging apically. Pronotum (Fig. 27 a, b), light brown dorsally, moderately widening posteriorly, anterior margin emarginated, posterior margin rounded and emarginated, metazona densely punctate, median carina prominent-dark brown, postocular band dark brown-blackish, diverging gently posteriorly and fading on metazona, mesoepimeron and anterior portion of metapleuron dark brownblackish, a white stripe along metaepimeron, lower portion of lateral lobes whitish-cream with this color extending on to lower portion of mesopleuron, tegmina short, ovate, attingent, brownish-half darker on lower portion, veins cream. Pro, meso and metathoracic femora tumescent, brownish, hind tibiae bluish. Abdomen with a dark brown band on each side-fading on the last three abdominal tergites, subgenital plate (Figs. 27 c, d; 28 c) subconical with a conspicuous tubercle apically. Supra-anal plate triangular, proximally broad, side margins almost straight, mediolongitudinal sulcus broad basally, moderately deep, beyond mid length, furculae obsolete (Figs. 27 d; 28 a). Cerci (Figs. 27 c, d; 28 b) elongated, as long as the supra-anal plate, broad basally, incurved and narrowing about mid portion, then widening, distally the upper margin bent conspicuously upwards and inwards; the upper margin rounded laterally and, in dorsal view, the ventral acute. Epiphallus (Figs. 27 e; 30 d, e) with medium size ancorae, shorter than the anterior process; anterior process moderately developed, distally pointed and projecting inwards; lophi large and prominent; broad bridge; posterior processes distally produced. Phallic complex as shown in Figs. 27 f; 30 a–c. Aedeagal valves (Fig. 31 a–c): Dorsal valvae tubular, distally broader and concave; ventral valvae elongated, basally broad, tapering gradually, half distal curved inwards, apex moderately expanded and rounded. Description of female.— Similar to the males, average 17 mm in length, general body color brown. The head medium size, face and genae whitish cream, eyes medium size and moderately prominent, interocular space wider than in males, antennae brownish. Pronotum dorsally brown, weakly widening posteriorly, metazone punctate, median carina prominent-dark brown, posterior margin gently emarginated, postocular band dark brown fading on metazone, lower portion of pronotal lateral lobes whitish cream, mesopleuron dark brown, metaepimeron with a white stripe. Tegmina short, ovate, attingent, brownish, lower portion darker. Pro, meso and metathoracic femora light brown, hind femora darker along the upper half of the outer face, with black apices; hind tibiae bluish. Cerci and ovipositor’ valves as shown in Fig. 32 a. Measurements (mm). Males.— Body length from vertex to end of hind femur: 15.0 (14.0–15.0). Pronotum length: 3.4 (3.1–3.8). Tegmina length: 2.8 (2.7–2.9). Hind femora length: 7.8 (7.8–7.9). Females: Body length: 17.0 (16.0–17.0). Pronotum length: 3.7 (3.5–3.9). Tegmina length: 3.2 (3.1–3.2). Hind femora length: 9.3 (9.2– 9.4). Distribution.— Species collected in Coahuila, Mexico, Sierra de Arteaga, at two localities: Jamé, 2394 m and El Cascajal, 1942 m (Fig. 32 b). Habitat.— The Sierra de Arteaga in the state of Coahuila, is part of the mountain ranges that form the northern portion of the Easter Sierra Madre (ESM), located north of the Tropic of Cancer in the temperate latitudinal zone (Fig. 33). The forest here is in a transition zone between the semiarid High Plateau and cool-temperate mountains of the ESM. Elevation ranges from 1,900 to 3,400 m. The climate in the area is sub-humid temperate. The average annual temperature and rainfall are 17 °C and 498 mm, respectively; rainfall is convective and matches with the warm months of the year (July-October). Lithosols are predominant and represent 49 % of the area, while Rendzina prevails in the foothills and valleys and represent 29 %. Vegetation types are represented by montane shrub, oak forest (Quercus), pine forest (pinyon pine forest.— P. cembroides), high altitude conifer forest (Abies and Pseudotsuga) and quaking aspen forest (Populus). M parvus n. sp., lives on herbaceous plants such as Piqueria trinervia, Anthemis sp., Senecio sp., (Asteraceae); Salvia sp., Mentha sp., Origanum sp., (Lamiaceae); Muhlenbergia sp., Buchloe dactyloides (Poaceae). Etymology.— The specific name parvus, alludes to the small size of this species.Published as part of Barrientos-Lozano, Ludivina, Rocha-Sánchez, Aurora Y. & Horta-Vega, Jorge V., 2013, Two new species of Melanoplus Stål, 1873 (Orthoptera: Acrididae: Melanoplinae) from northeastern Mexico, pp. 261-286 in Zootaxa 3669 (3) on pages 278-283, DOI: 10.11646/zootaxa.3669.3.4, http://zenodo.org/record/24756
"Closing the R&D Gap, Evaluating the Sources of R&D Spending"
No full textBoth spending and tax policies have been implemented in the United States with the goal of stimulating private sector research and development (R&D). Karier questions whether current R&D policy, especially the research and experimentation tax credit, can contribute to closing the gap between nondefense expenditures on R&D in the United States and such expenditures in other countries, such as Japan and Germany. He also explores possible changes to our current R&D policy to make it more effective.
Obolopteryx huastecana Barrientos-Lozano, Rocha-Sánchez, Zaldívar-Riverón & Correa-Sandoval, 2016, n. sp.
No full textObolopteryx huastecana n. sp., Barrientos-Lozano & Rocha-Sánchez Figs. 69–86 http://lsid.speciesfile.org/urn:lsid: Orthoptera.speciesfile.org:TaxonName:491298 Type material. Holotype ♂ and allotype ♀. México, San Luis Potosí, Valles, Poblado El Salvador, Hwy. 85, Cd. Mante-Valles, 266 m, 08.VIII.2015, Lat. 22°39’41.28”N, Long. 99°01’20.18”W, Barrientos-Lozano L. & Rocha- Sánchez A.Y. Paratypes, Tamaulipas: 1 Ƌ, 3 ♀, Rd. Tam. 66, Tula-Ocampo, 444 m, 25.VII.2002, Lat. 22°53.639’N, Long. 99°26.499’W, Barrientos-Lozano L.; 4 Ƌ, 1 ♀, Rd. Ocampo-Mante, 383 m, 25.VII.2002, 12.VII.2007, Lat. 22°49.307’N, Long. 99°15.413’W, Barrientos-Lozano L.; 1 Ƌ, Reserva de la Biosfera (RB) El Cielo, Gómez Farías-La Florida, 58 m, 20.VIII.2003, Lat. 23°59.542’N, Long. 99°09.573’W, Barrientos-Lozano L.; 1 Ƌ, Rd. Gómez Farías-Alta Cima, 440 m, 12.IX.2003, Lat. 23°03.310’N, Long. 99°10.133’W, Barrientos-Lozano L. Veracruz: 5 ♀, Rd. 39, Estación Manuel-Ébano, Km 11, Rancho El Gualul, 21 m, 10.XI.2001, Lat. 22°18’13.35”N, Long. 98°22’42.25”W, Barrientos-Lozano L. San Luis Potosí: 1 Ƌ, 2 ♀, Xilitla, Castillo Edward James, 621 m, 17.XI.2011, Lat. 21°23’45.6”N, Long. 98°59’47.8”, Barrientos-Lozano L. & Rocha-Sánchez A. Y.; 2 Ƌ, Valles, Ej. El Pujal, 106 m, 17.XI.2011, Lat. 22°00’37.6”N, Long. 99°00’04.40’’W, Barrientos-Lozano L. & Rocha-Sánchez A. Y.; 1 Ƌ, 10 ♀, Taninul, 76 m, 27.VII.2002, Lat. 21°56.764’N, Long. 99°24.037’W, Lumbreras S. L.; 1 ♀, Gómez Farías, Rancho Pico de Oro, 102 m, 05.VIII.2009, Lat. 23°03’41.1”N, Long. 99°07’07.5”W, Barrientos-Lozano L. & Rocha-Sánchez A. Y.; 1 Ƌ, 1 ♀, Mante-Antiguo Morelos, Km 193, 316 m, 20.VIII.2010, Lat. 22°33.196”N, Long. 99°08.108”W, Barrientos-Lozano L. & Rocha-Sánchez A. Y.; 1 ♀, Victoria, Altas cumbres, 916 m, 22.VII.2004, Lat. 23°35’20.3”N, Long. 99°13’10.9”W, Torres-Acosta R. I.; 1 ♀, Hwy. 85, San Roberto-El Abra, 111 m, 24.IX.2007, Lat. 22°39’41.28”N, Long.99°01’20.18”W, Barrientos-Lozano L. Diagnosis. Similar to O. poecila in general appearance, but O. huastecana n. sp., is of larger size and more robust (body length 23.4± 1.3 mm vs. 17.3± 2.9). It may be also distinguished from O. poecila as follows: fastigium of vertex more compressed and slightly shorter in dorsal view, fastigium frontalis broader and less produced distally, in frontal view (Figs. 71a, 71b vs. 88a, 88b). Eyes more prominent, pronotum more constricted mesially, tegmina delicately more produced (3.7±0.2 vs. 3.2±0.5) (Fig. 70 vs. 87). Different stridulatory file as shown in Fig. 72 vs. 89, in O. huastecana n. sp ., its estimated length is 8 mm, with ca. 106 teeth, average 13 (8–24) teeth/mm, while in O. poecila the length of the stridulatory file is 7 mm approximately, with ca. 131 teeth and an average of 18 (7–36) teeth/mm. In O. huastecana n. sp., the epiproct is widely excised distally, forming an angle of approximately 180°, therefore the epiproct distal lobes are more produced (Fig. 75 vs. 91); not so in O. poecila. Distinctive cerci (Figs. 73–76, vs. 90–93), subgenital plate (Fig. 76 vs. 93), and internal genitalia (Figs. 77–78 vs. 94–95). Females are different in size, in average larger in O. huastecana n. sp ., than in O. poecila (body length 20.3±1.8 vs. 18.4± 3.8 mm), fastigium of vertex, eyes, pronotum and tegmina (Fig. 80 vs. 96). The ovipositor, subgenital plate and basal sclerites also differ from homologous structures in O. poecila (Figs. 81 –83 vs. 97–98). Description of males (alive). Large size, compared to congeneric species (Figs. 69, 84). Body slender and robust, general color dark green, dorsum mostly dark red with tinges of brown. Fastigium of vertex compressed, yellowish-creme, almost in contact with the fastigium frontalis, in dorsal view; fastigium frontalis broad, distally rounded, in frontal view (Figs. 71a, 71b). Antennal sockets yellowish-creme, antennae reddish-brown-proximally, remaining portion darker, and flagellum with some black segments (Figs. 70, 84). Face yellowish-green, eyes rounded and prominent, white post ocular band attenuating posteriorly, extending onto sides of pronotum and abdomen, on pronotum it becomes turquoise green in color and fades towards middle portion, white on abdomen sides. Pronotum (Figs. 70, 84) dark-red or brown, constricted mesially, median carinae conspicuous not very prominent, typical sulcus on pronotal disc deep U-shape over the metazone; anterior and posterior margins moderately emarginated; lateral lobes of pronotum wider than deep, lower margin white. Tegmina slightly surpassing the posterior margin of the first abdominal tergite, mostly brown, proximal area including the stridulatory file, and a conspicuous band on ventral margin, white (Figs. 70, 84). Stridulatory file as shown in Fig. 72. Fore femora half proximal portion green color, remaining portion orange or reddish; mid femora with proximal two thirds green color, remaining third orange; half proximal portion of hind femora green, then orange, distally black. Tibiae mostly orange, except for a proximal, external portion, which is black. Abdomen with a dark red or brown, broad, dorso lateral band on each side, attenuating distally; green along mid line, abdominal tergites posterior margin with broad white marks, delicate brown spots on abdomen dorsum (Fig. 84). Tenth tergite disto– dorsal projection, cerci, epiproct, subgenital plate, and titillators as shown in Figs. 73–78. Description of females (alive). Similar to the males, slightly more robust (Figs. 79, 85). General body color dark green. Head’s dorsum (antennal sockets, scape, fastigium, vertex and occiput) greenish, the occiput bears broad brown bands on each side. In some specimens, the head dorsum is almost entirely dark brown. Pronotum greenish, less constricted mesially than in males, median carinae whitish and slightly more conspicuous than in males, a broad reddish band along midline, two large dark brown marks about mid-length, one each side, and posterior margin with white and brown conspicuous marks. Some females with pronotum entirely dark red or brown, except for the dark brown marks around mid-length and posterior lateral angles, which are dark brownblack. This dark brown color extends onto metanotum and first abdominal tergite. Tegmina very short, rounded, not reaching the caudal margin of metanotum, separated from each other for about 1,5 mm ± 0.1, about two and a half times broader than long, mostly white with tinges of brown and/or reddish. Abdomen bearing reddish-brown lateral bands, one each side (Fig. 85), proximally and distally darker and more conspicuous, dark brown-black spots on abdomen dorsum. Ovipositor (Figs. 81, 85) mostly reddish-brown, moderately curved, distally rounded. Subgenital plate, ovipositor’s lobe, and basal sclerites as shown in Figures 81 –83. Measurements (mm). Males. Body length from vertex to end of abdomen: 23.4±1.3 (21.3–24.6). Pronotum length: 4.5±0.2 (4.2–4.8). Tegmina length: 3.7±0.2 (3.4–3.8). Fore femur length: 9.5±0.4 (9.0–10.2). Mid femur length 11.1±0.8 (10.1–11.9). Hind femur length: 23.7±1.1 (21.8–24.7). Females: Body length: 20.3±1.8 (18.5– 22.6). Pronotum length: 5.1±0.5 (4.5–5.8). Tegmina length: 0.8±0.1 (0.8–0.9). Fore femur length: 9.3±0.7 (8.5– 10.0). Mid femur length: 11.1±0.4 (10.5–11.6). Hind femur length: 25.2±1.0 (24.1–26.4). Ovipositor length: 9.9±0.3 (9.6–10.4). Inter–tegmina space: 1.4±0.2 (1.2–1.6). Distribution (Fig. 130). Collected in south Tamaulipas and eastern San Luis Potosí, México, from about sea level to 650 m. Habitat (Fig. 86). O. huastecana n. sp ., inhabits also the Huasteca Region, it encompasses a portion of land rich in natural resources from the Eastern Sierra Madre (ESM) mountain range to the Gulf of Mexico. The Huasteca is characterized by a topographic and climatic complexity. O. huastecana n. sp . inhabits the lowlands feeding on thorny shrub vegetation such as Prosopis sp., Acacia farnesiana (Fabaceae), Karwinskia humboldtiana (Rhamnaceae) and/or on secondary vegetation. Climate at the Huasteca is humid temperate, average annual temperature varies between 23–25°C. Due to moisture from the Gulf of Mexico, rainfall is generally abundant; it ranges between 800–1600 mm per year, depending on altitude and location from the coast. Etymology. The specific name “ huastecana ” refers to the Huasteca region where this species has been collected.Published as part of Barrientos-Lozano, Ludivina, Rocha-Sánchez, Aurora Y., Zaldívar-Riverón, Alejandro & Correa-Sandoval, Alfonso, 2016, Additional new species of the genus Obolopteryx Cohn et al. 2014 (Ensifera: Tettigoniidae) from Northeastern Mexico, pp. 401-452 in Zootaxa 4168 (3) on pages 425-435, DOI: 10.11646/zootaxa.4168.3.1, http://zenodo.org/record/25470
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Aging, work and the demographic dividend in South Asia
No full textMuch current interest in South Asia's population structure focuses on 'the working generation' (aged 15-60) and particularly on the 'youth' who could potentially deliver a 'demographic dividend', thereby solving the conundrum of population ageing in developing economies. In contrast to this idea and the related one underlying a wide range of development strategies, that reductions of poverty at younger ages will have a meaningful impact on poverty in old age, this paper will demonstrate, first, that older people’s paid and unpaid work is needed to realise the demographic dividend, second, that older people already play an important role in reducing family poverty and sustaining national economies and, third, that only age-specific policies can address poverty in old age
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