15,669 research outputs found
New Necklaces: 400 Designs in Contemporary Jewellery
No full textAfter the successful New Rings and New Earrings, New Necklaces is the third book curated by jeweller and author Nicolas Estrada, from classic forms and materials to the most daring, experimental and surprising ideas, each of the 500 necklaces included in this book has something that makes it unique and relates strongly to today's social, cultural and artistic reality. With prefaces by German jeweller Julia Wild and Leo Caballero, owner of the Barcelona gallery Klimt 02, specialised in contemporary jewellers
Heuristic Schelling: economy of organized crime
No full textThis article proposes a reading of the armed conflict from an evolutionary design that takes into account the concept of private protection agencies in the works of Schelling. Their aim is to assess the dynamics of conflict and changes from its author's scientific output. A context of conflicts that includes new expressions of violence and the relative failure of the paramilitary reintegration involves using new analytical models (argumentation, game theory and inconsistent information). The recent evolution of emerging gangs and their expansion into areas that were paramilitary camps requires monitoring not only of the government and the authorities, but those investigating the conflict in the present tense. The author provides heuristic research support from Schelling’s theory of strategy, recent contributions to the relationship between organized crime and drug cartels.Colombia, Government, Civil War, Latin America, Security, Protection Agencies.
Arthrobrachus antonioi Estrada, 2016, n. sp.
No full textArthrobrachus antonioi n. sp. (Figure 3) Holotype: Male from Argentina Tucumán, 14 Nov. 1929; H. E. Box collector // Arthrobrachus antonioi Estrada, 2015 // Holotype (all handwritten) // circular (pink). Deposited in MLPA. Paratypes: Catamarca // L.P. // Arthrobrachus antonioi Estrada, 2015 // Paratype. Deposited in MLPA (1 ♂). Argentina, Jujuy, Tilcara, 24 /01/ 1948 // T // Arthrobrachus antonioi Estrada, 2015 // Paratype. Deposited in IMLA (1 ♂ 1 ♂). Argentina, Prov. San Luis, Villa Elena, Nov., 1976, leg. M. Viana // Colección J. E. Barriga, Chile 113779 // Arthrobrachus antonioi Estrada, 2015 // Paratype. Deposited in MNNC (1 ♂). Argentina, Prov. San Luis, Sn. Gerónimo, Dic, 1972, leg. G. Williner // Colección J. E. Barriga, Chile 115142 // JEBC // Arthrobrachus antonioi Estrada, 2015 // Paratype. Deposited in MNNC (1 ♂). Argentina, Tucumán, 14 Nov. 1929 // Col. C. Bruch // H. E. Box Collector // 3368 // Arthrobrachus antonioi Estrada, 2015 // Paratype. Deposited in MACN // circular label (black) (1 ♂). Chaco // Mus. Arg. Cs. Nat. // 6822 // 11291 // Arthrobrachus antonioi Estrada, 2015 // Paratype. Deposited in MACN // circular label (black) (1 ♂). Etymology. antonioi, in honour to Antonio Martínez L., my husband, because of his genuine curiosity for nature, specially for insects, in recognition of his unconditional and affectionate support and great stimulus for the achievement of my personal and professional goals. Diagnosis. Antenna with four dilated preapical antennomeres (Fig. 3 i); pronotum with additional carina subparallel to the lateral carina in the anterior third, and one circular impression in the basal angle; epipleura wide, with convergent margins toward the apex; male ventrite 6 with two lateral, flat, transverse, subcontiguous plates (Fig. 3 h); last tergite nearly square, with rounded distal angles (Fig. 3 h); parameres basally weakly sclerotized (Fig. 3 a); tegmen without dorsal flange at the base of the parameres, tegminal plate reduced and weakly sclerotized, apodeme reduced or inconspicuous (Fig. 3 b), tegminal arms strongly curved basally (Fig. 3 c); median lobe with membranous grooved dorsal surface (Fig. 3 d), with narrow flection area, apodeme with ventral apical protuberance (Fig. 3 e–f). The female of this species has not been recognized. Description. Average body length: 4.3 mm (range: 3.5 –5.0 mm), length: width ratio 2.12: 1, sides subparallel; punctuation coarse, dense in the head, pronotum and elytra; pubescence fine, short and inclined, dense in pronotum and scattered in the head; thick, short, erect, dense and uniformly distributed hairs on elytra; body dark-testaceous, pronotum black, with clear edges or light testaceous bottom with a black spot at the center, elytra always lighttestaceous with a black spot in the parahumeral area, antennae and legs orange. Head: Including eyes narrower than the anterior margin of pronotum (0.862: 1); antennae shorter than the pronotum (0.716: 1), with four medially dilated preapical antennomeres (Fig. 3 i). Thorax: Pronotum wider than long (1.4: 1), moderately convex transversely and slightly convex longitudinally, base wider than apex (1.31: 1) and almost as wide as humeral region (0.962: 1); from a dorsal view the anterior margin is slightly convex, anterior and posterior margins fine, lateral margins curved, hind angles marked, with adjacent circular impression, lateral edges of disc narrow and flat, with additional anterior carina subparallel to the lateral carina; elytra 1.42: 1 longer than wide; lateral margin subparallel, rounded at distal third, elytral disc moderately convex transversely and slightly descending in the distal portion, lateral sides flat, horizontal, scarcely narrower than the epipleura; epipleura wide, of constant width throughout its length, sides convergent at the apex, glabrous and almost flat, internal margin with scarce denticles; legs: all the tibiae with scarce, short spines at external margin; tarsomeres with abundant apical spines. Abdomen: Ventrite 5 flat with nearly straight distal margin; ventrite 6 with two flat lateral subcontiguous plates; last tergite subsquare, with rounded distal angles and posterior margin slightly emarginate medially, its apodemes moderately long, pubescense thick and short, scattered (Fig. 3 h); segment 9 very fine, weakly sclerotized, with fine sternal arms and long apodeme (Fig. 3 g). Genitalia: parameres wide, rounded at the apex, sides slightly convergent, slightly convex, lightly esclerotized, emarginated at base; from a lateral view the lower margin of parameres and tegmen in straight-line; tegmen without dorsal flange at the base of the parameres, tegminal arms thick, first subparallel and after curved and convergent medially, from a lateral view strongly and abruptly bent at the base, apodeme laminated and moderately reduced, tegminal plate weakly sclerotized, irregularly cut in the distal margin, extended to the base of the apodeme (Fig. 3 a,b,c); median lobe subcylindrical, lateral margin subparallel, apex pointed, grooved, dorsal surface membranous in its full extent, with narrow flection area (Fig. 3 e,fl), apodeme enlarged (Fig. 3 d,e,f). Distribution. ARGENTINA (Fig. 10): Provinces of Jujuy (IMLA), Salta (IMLA, MACN), Tucumán (IMLA, MACN), Catamarca (IMLA, MACN), Córdoba (IMLA, JEBC), San Luis (IMLA, JEBC, IADIZA); Mendoza (MACN).Published as part of Estrada, Patricia, 2016, Species of the genus Arthrobrachus Solier, 1849 (Coleoptera: Melyridae) distributed to the East of the Andes, pp. 371-387 in Zootaxa 4092 (3) on pages 375-376, DOI: 10.11646/zootaxa.4092.3.3, http://zenodo.org/record/25981
Macroscopic limit of a kinetic model describing the switch in T cell migration modes via binary interactions
No full textExperimental results on the immune response to cancer indicate that activation of cytotoxic T lymphocytes (CTLs) through interactions with dendritic cells (DCs) can trigger a change in CTL migration patterns. In particular, while CTLs in the pre-activation state move in a non-local search pattern, the search pattern of activated CTLs is more localised. In this paper, we develop a kinetic model for such a switch in CTL migration modes. The model is formulated as a coupled system of balance equations for the one-particle distribution functions of CTLs in the pre-activation state, activated CTLs and DCs. CTL activation is modelled via binary interactions between CTLs in the pre-activation state and DCs. Moreover, cell motion is represented as a velocity-jump process, with the running time of CTLs in the pre-activation state following a long-tailed distribution, which is consistent with a Lévy walk, and the running time of activated CTLs following a Poisson distribution, which corresponds to Brownian motion. We formally show that the macroscopic limit of the model comprises a coupled system of balance equations for the cell densities, whereby activated CTL movement is described via a classical diffusion term, whilst a fractional diffusion term describes the movement of CTLs in the pre-activation state. The modelling approach presented here and its possible generalisations are expected to find applications in the study of the immune response to cancer and in other biological contexts in which switch from non-local to localised migration patterns occurs
Tradiciones españolas : Valencia y su provincia
No full textEs o t.1, non se publicaron máis (Palau, 217976)Es t. I., no se publicaron más (Palau, 217976)Marca tip. na portMarca tip. en por
El Tlacuache Núm. 116 (2004). 116 Año 4 (2004) febrero. El Tlacuache
No full text- Museos I: El Mundo por Elba Estrada Hernández. - El Yauhtli por Margarita Avilés y Macrina Fuentes. - Museos II: México por Elba Estrada Hernández
Returnability in complex directed networks (digraphs)
No full textThe concept of returnability is proposed for complex directed networks (digraphs). It can be seen as a generalization of the concept of reciprocity. Two measures of the returnability are introduced. We establish closed formulas for the calculation of the returnability measures, which are also related to the digraph spectrum. The two measures are calculated for simple examples of digraphs as well as for real-world complex directed networks and are compared with the reciprocity
Every nonsingular spherical Euclidean distance matrix is a resistance distance matrix
No full textThe communicability distance (Estrada (2012) [5]) is a useful metric to characterize alternative navigational routes in graphs. Here we prove that it is the resistance distance between a pair of nodes in a weighted graph. We extend this result and prove that every nonsingular Euclidean distance matrix is the resistance distance matrix of a weighted graph. We briefly analyze some mathematical properties of the communicability Laplacian matrix which emerges from the current analysis.The author thanks anonymous referee for important corrections on the original version. Financial support by the grant PID2019-107603GB-I00 of the MCIN/AEI/0.13039/501100011033/ is also acknowledged.Peer reviewe
Parque Nacional do Iguaçu e comunidades do entorno: gestão e conflitos
No full textDissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências da Educação, Programa de Pós-Graduação em Educação, Florianópolis, 2009A dissertação aqui apresentada é expressão de uma pesquisa qualitativa, de cunho etnográfico, que teve seu princípio fundamentado em uma pergunta: como, a partir do fechamento da Estrada do Colono, acontece a relação das comunidades do entorno com o meio ambiente e os órgãos gestores do Parque Nacional do Iguaçu (PNI) e quais são as condições que dificultam a resolução dos conflitos? O objetivo proposto para o trabalho é compreender os aspectos histórico-culturais predominantes na constituição das identidades dos agentes moradores do entorno deste Parque, bem como, a relação entre estes e o IBAMA, após o fechamento da Estrada do Colono. A pesquisa de campo para coleta das informações e alargamento das observações sobre os conflitos durou quatro meses e foi realizada nos municípios de Capanema e Serranópolis do Iguaçu, situados no entorno do PNI. A dissertação está organizada de forma a problematizar três eixos dialógicos que incluem o resgate histórico dos municípios estudados e do próprio PNI; uma construção teórica sobre o tema pesquisado e alguns aportes que explicam a rede de significações transversalizada na fala dos agentes da pesquisa. A abrangência dessas falas possibilita entender que o processo de gestão do PNI, após o fechamento da Estrada do Colono agrega, de maneira precária, a participação das comunidades. Aliado a isso, os usos políticos do conflito acirraram as dificuldades de diálogo entre o órgão gestor e as populações do entorno. A questão ambiental, a partir desse olhar, adentra os discursos e se mostra vinculada, de um lado, à garantia do fechamento da Estrada pelos ambientalistas; de outro, como ônus pela reabertura da mesma, as reivindicações pró-abertura. Observa-se ainda que, mesmo com fragilidades, os programas de educação ambiental facilitaram o diálogo entre administração do PNI e as populações.La dissertation présenté ici est une expression de la recherche qualitative, l'ethnographie, qui a son principe repose sur une question: comment, à partir de la fermeture de Estrada do Colono, est la relation des communautés avoisinantes avec l'environnement et des organes de gestion du Parque Nacional do Iguaçu (PNI) et quelles sont les conditions qui font obstacle à la résolution des conflits? L'objectif pour le travail proposé est de comprendre les aspects historiques et culturels qui prévalent dans la formation de l'identité des agents résidents du parc, et la relation entre ces derniers et l'IBAMA, après la fermeture de l' Estrada do Colono. La dissertation sur le terrain pour la collecte d'informations et d'étendre les observations sur le conflit a duré quatre mois et a été menée dans les municipalités de Capanema et Serranópolis do Iguaçu, situées autour de la PNI. Le mémoire est organisé pour discuter de trois domaines qui comprennent l'examen de l'historique de sauvetage des villes étudiées et PNI, une construction théorique sur le sujet étudié et quelques contributions qui expliquent le réseau de significations dans le discours des acteurs transversalizada recherche. L'inclusion de ces lignes permet de visualiser le processus de gestion des PNI, après la fermeture de l'autoroute de l'ensemble du côlon, de façon précaire, la participation des communautés. En outre, l'utilisation des difficultés politiques de la concurrence féroce de conflit entre le gestionnaire national et de la population. La question de l'environnement, de la recherche, dans le discours tenu et est montré, d'une part, à assurer la fermeture de la route par les écologistes, d'autre part, que le coût de la réouverture, les revendications pro-ouverture. On observe que, même avec des problèmes, des programmes d'éducation environnementale afin de faciliter le dialogue entre le gouvernement et le peuple du PNI
The power to tax
No full textThis article describes the argumentative structure of Hayek on the relationship between power to tax and redistribution. It is observed throughout its work giving special attention to two works: The Constitution of Liberty (1959) and Law, Legislation and Liberty, vol3; The Political Order of Free People, 1979) Hayek describes one of the arguments most complete information bout SFP progressive tax systems (progressive tax). According to the author the history of the tax progressive system, works against such a tax model and deploys a variety of arguments in his favorite spot by critics: liberal democracy.Power to Tax, Redistribution, Government, Progressive Tax, Democracy, Hayek
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