511 research outputs found
Tablas perpetuas ... necesarias para poder arreglar perfectamente en reloxes de pendola real, de mesa ... calculadas con suma exactitud en horas minutos y segundos, para la latitud y el meridiano de Pamplona ... Navarra ..
No full textIniciais do autor tomadas de censuraD. A. D. G. son iniciais de Andrés Gilabert, según Rogers, p. 140, seguindo a I. L. McClelland, I, 26, nº 45Sign. : [], e-f, gPort. e texto fileteado
Building on the built in Maya architecture: comparative analysis of three pyramidal buildings
No full textBIA2014-53887-C2-1-P, BES-2015-071296, PAID-01-17Montuori, R.; Gilabert Sansalvador, L. (2019). La práctica de construir sobre lo construido en la arquitectura maya: análisis comparativo de tres edificios piramidales. Gangemi Editore International. 831-842. https://riunet.upv.es/handle/10251/201061S83184
Developments in Predistortion and Feedforward Adaptive Power Amplifier Linearisers
No full textKey issues in predistortion and feedforward
linearisation solutions for future complex PA systems
destined for a wide range of evolving advanced wireless
systems are reviewed in this paper. In particular, digital
techniques and adaptive schemes are discussed
Behavioral modeling and digital predistortion for the linearization of a mm-wave Power Amplifier
No full textThe use of Digital Predistortion (DPD) for linearizing a millimeter-wave
Power Amplifier (PA) is investigated. A PA operating at 38 GHz is designed using an accurate nonquasi-static transistor model taking into account both short- and long-term memory effects. A realistic test signal is then used for the identification of a Nonlinear Auto-Regressive Moving Average (NARMA) behavioral model of the PA. The NARMA-based digital predistorter is then derived and formulated in terms of Basic Predistortion Cells, especially suitable for efficient implementation in an FPGA. The performance of the predistortion solution is preliminarily assessed by means of computer
simulations
An Investigation of the Maya Vault: Methodology and Cultural Significance
No full text[ES] Este trabajo presenta la metodología empleada
y los principales resultados obtenidos en una
investigación realizada recientemente sobre la
bóveda en la arquitectura maya. Para abordar
esta investigación se registró una amplia muestra
de 391 bóvedas de diferentes áreas geográficas
y períodos cronológicos. Los datos tomados en
campo se complementaron con la información de
la bibliografía existente y se introdujeron en una
Base de Datos de Bóvedas Mayas, un sistema creado ex profeso para archivar, analizar y comparar
todas las características de las bóvedas. A partir
de la muestra registrada se realizó un estudio
arquitectónico en profundidad sobre la bóveda
maya, que contempla los aspectos formales, geométricos, funcionales y constructivos, con especial atención al estado de conservación actual de
los edificios y a los mecanismos de deterioro que
les afectan. Como resultado, se propone una novedosa clasificación de la bóveda maya que atiende
a diferentes criterios y que se establece como
una herramienta muy útil para el registro de las
bóvedas mayas. El análisis comparativo realizado
entre las características de las bóvedas de diferentes áreas geográficas permitió caracterizar las
variantes regionales de la bóveda maya y analizar
su desarrollo temporal, revelando importantes resultados para la historia cultural de la civilización
maya.[EN] This paper presents the methodology and the main results of a recently conducted research about the vault in Maya architecture. The study examined this archetypal element by recording data from a wide sample of 391 vaults from different geographical zones and chronological periods. The data collected during fieldwork were complemented by results from previous studies and put into the Maya Vault Database, a new system created to archive, analyze and compare all the features of the vaults. The sample was then analysed from an architectural perspective, taking into account aspects such as form, geometry, function and constructive features of the vaulted spaces, and paying special attention to the conservation state and the mechanisms of decay affecting this type of structures. Based on this analysis, a general classification of the Maya vault according to various criteria was proposed, which provides an efficient tool to register and document Maya vaults. The comparative study of the sample allowed to identify the particularities and the most characteristic features of the vault regional variants, as well as to study their development over time, which reveals results of great interest for cultural history.This work was funded by the Spanish Ministry of Science, Innovation and Universities by the
Aid Program for pre-doc contracts for the training of doctors (ref. BES-2015-071296), in the framework
of the I+D+i research project entitled Arquitectura maya. Sistemas constructivos, estética formal y nuevas
tecnologías (ref. BIA2014-53887-C2-1-P).Gilabert Sansalvador, L. (2020). An Investigation of the Maya Vault: Methodology and Cultural Significance. Journal of Global Archaeology. 2020:42-67. https://doi.org/10.34780/joga.v2020i0.1008S4267202
Duals of variable exponent Hörmander spaces (0 < p− ≤ p+ ≤ 1) and some applications
No full text[EN] In this paper we characterize the dual (Bc
p(·) (Ω))′ of the variable exponent Hör-
mander space Bc
p(·) (Ω) when the exponent p(·) satisfies the conditions 0 < p− ≤ p+ ≤ 1,
the Hardy-Littlewood maximal operator M is bounded on L p(·)/ p0 for some 0 < p0 < p−
and Ω is an open set in Rn . It is shown that the dual (Bc
p(·) (Ω))′ is isomorphic to the Hörmander
space Bloc
∞ (Ω) (this is the p+ ≤ 1 counterpart of the isomorphism (Bc
p(·) (Ω))′ Ω Bloc
˜p′(·) (Ω),
1 < p− ≤ p+ < ∞, recently proved by the authors) and hence the representation theorem(Bc
p(·) (Ω))′ Ω lN
∞ is obtained. Our proof relies heavily on the properties of the Banach
envelopes of the steps of Bc
p(·) (Ω) and on the extrapolation theorems in the variable Lebesgue
spaces of entire analytic functions obtained in a precedent paper. Other results for p(·) ≡ p,
0 < p < 1, are also given (e.g. Bc
p(Ω) does not contain any infinite-dimensional q-Banach
subspace with p < q ≤ 1 or the quasi-Banach space Bp ∩ E′(Q) contains a copy of l p when
Q is a cube in Rn ). Finally, a question on complex interpolation (in the sense of Kalton) of
variable exponent Hörmander spaces is proposedJ. Motos is partially supported by grant MTM2011-23164 from the Spanish Ministry of Science and Innovation. The authors wish to thank the referees for the careful reading of the manuscript and for many helpful suggestions and remarks that improved the exposition. In particular, the remark immediately following Theorem 2.1 and the Question 2 were motivated by the comments of one of them.Motos Izquierdo, J.; Planells Gilabert, MJ.; Talavera Usano, CF. (2015). Duals of variable exponent Hörmander spaces (0 < p− ≤ p+ ≤ 1) and some applications. Revista-Real Academia de Ciencias Exactas Físicas Y Naturales Serie a Matemáticas. 109(2):657-668. https://doi.org/10.1007/s13398-014-0209-zS6576681092Aboulaich, R., Meskine, D., Souissi, A.: New diffussion models in image processing. Comput. Math. Appl. 56(4), 874–882 (2008)Acerbi, E., Mingione, G.: Regularity results for stationary electro-rheological fluids. Arch. Ration. Mech. Anal. 164(3), 213–259 (2002)Bastero, J.: l q -subspaces of stable p -Banach spaces, 0 < p ≤ 1 . Arch. Math. (Basel) 40, 538–544 (1983)Boas, R.P.: Entire functions. Academic Press, London (1954)Boza, S.: Espacios de Hardy discretos y acotación de operadores. Dissertation, Universitat de Barcelona (1998)Cruz-Uribe, D., Fiorenza, A.: Variable Lebesgue spaces, foundations and harmonic analysis. Birkhäuser, Basel (2013)Cruz-Uribe, D.: SFO, A. Fiorenza, J. M. Martell, C. Pérez: The boundedness of classical operators on variable L p spaces. Ann. Acad. Sci. Fenn. Math. 31, 239–264 (2006)Diening, L., Harjulehto, P., Hästö, P., Růžička, M.: Lebesgue and sobolev spaces with variable exponents. lecture notes in mathematics, vol. 2007. Springer, Berlin, Heidelberg (2011)Hörmander, L.: The analysis of linear partial operators II, Grundlehren 257. Springer, Berlin, Heidelberg (1983)Hörmander, L.: The analysis of linear partial operators I, Grundlehren 256. Springer, Berlin, Heidelberg (1983)Kalton, N.J., Peck, N.T., Roberts, J.W.: An F -space sampler, London Mathematical Society Lecture Notes, vol. 89. Cambridge University Press, Cambridge (1985)Kalton, N.J.: Banach envelopes of non-locally convex spaces. Canad. J. Math. 38(1), 65–86 (1986)Kalton, N.J., Mitrea, M.: Stability results on interpolation scales of quasi-Banach spaces and applications. Trans. Am. Math. Soc. 350(10), 3903–3922 (1998)Kalton, N.J.: Quasi-Banach spaces, Handbook of the Geometry of Banach Spaces, vol. 2. In: Johnson, W.B., Lindenstrauss, J. (eds.), pp. 1099–1130. Elsevier, Amsterdam (2003)Köthe, G.: Topological vector spaces I. Springer, Berlin, Heidelberg (1969)Motos, J., Planells, M.J., Talavera, C.F.: On variable exponent Lebesgue spaces of entire analytic functions. J. Math. Anal. Appl. 388, 775–787 (2012)Motos, J., Planells, M.J., Talavera, C.F.: A note on variable exponent Hörmander spaces. Mediterr. J. Math. 10, 1419–1434 (2013)Stiles, W.J.: Some properties of l p , 0 < p < 1 . Studia Math. 42, 109–119 (1972)Triebel, H.: Theory of function spaces. Birkhäuser, Basel (1983)Vogt, D.: Sequence space representations of spaces of test functions and distributions. In: Zapata, G.I. (ed.) Functional analysis, holomorphy and approximation theory, Lecture Notes in Pure and Applied Mathematics, vol. 83, pp. 405–443 (1983
Architecture, creusement et évolution des hypogées à la fin du Néolithique: la nécropole de S'Elighe Entosu (Sassari, Sardaigne)
No full textIn Sardinia, hypogea were dug with increasing frequency in the 4th millennium BC, especially in the
north-western part of the island. The S’Elighe Entosu necropolis is composed of eight hypogea dug between
the Final Neolithic and the Bronze Age. Maria Grazia Melis and her team are currently studying this site.
Their research addresses various topics, including the positioning of the necropolis on the landscape, the
architecture of the tombs and the diverse phases of related human activity. The architectural data was
recently updated through a study of the excavation techniques employed to create the monuments. This
new information has been fundamental to understanding the articulation of human presence at the site
and the history of the various modifications made to the hypogea. The study of the excavation is based on
analysis of the tool marks on the monument walls and of the tools found in Tomb IV. Experimentation has
played an important role in this work. This research has led to the creation of a database of tool-marks, the
study of picks and the experimental reproduction of this type of tool.Le creusement des hypogées funéraires connaît en Sardaigne un important développement au IVe
millénaire BC, notamment dans la partie nord-ouest de l’île. La nécropole de S’Elighe Entosu est un site
présentant huit hypogées allant du Néolithique final à l’âge du bronze. Elle est le cadre de recherches menées
par Maria Grazia Melis et son équipe. Ces recherches ont vu le développement de plusieurs problématiques
liées à l’insertion de cette nécropole dans le paysage, l’architecture des tombes et les multiples phases de
fréquentation de ce site. Dernièrement les données concernant l’architecture ont connu un développement
nouveau par le biais de l’étude des techniques de creusement des monuments. Ces informations sont
fondamentales pour comprendre l’articulation du site et l’histoire des différents remaniements des hypogées.
L’étude du creusement se base sur l’analyse des traces présentes sur les parois des monuments et sur le
macro outillage découvert dans la tombe IV. Une place importante est donnée à l’expérimentation. Ces
recherches ont mené à la création d’une base de données sur les traces, l’étude des pics de creusement et
la réalisation expérimentale de ce type d’outil
Etude préliminaire de la collection céramique affiliée aux niveaux du Néolithique final de la Baume d’Oulen
No full textDans N. Teyssandier, R. Furestier, C. Gilabert, P. Guillermin, L. Slimak (dir.), Fouilles archéologiques de La Baume d’Oulen, Le Garn et Labastide-de-Virac (Gard – Ardèche). Fouille programmée annuelle 2017. Document final de synthèse, inédit. Toulouse
Etude préliminaire de la collection céramique affiliée aux niveaux du Néolithique final de la Baume d’Oulen
No full textDans Fouilles archéologiques de La Baume d’Oulen, Le Garn et Labastide-de-Virac (Gard – Ardèche). Fouille programmée annuelle 2016. Sous la direction de N. Teyssandier, R. Furestier, C. Gilabert, P. Guillermin, L. Slimak. Document final de synthèse, Toulouse
Etude préliminaire de la collection céramique affiliée aux niveaux du Néolithique final de la Baume d’Oulen
No full textDans Fouilles archéologiques de La Baume d’Oulen, Le Garn et Labastide-de-Virac (Gard – Ardèche). Fouille programmée annuelle 2016. Sous la direction de N. Teyssandier, R. Furestier, C. Gilabert, P. Guillermin, L. Slimak. Document final de synthèse, Toulouse
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