180,418 research outputs found
Unes converses amb Joan Ferraté: anys de joventut
No full textIntervenció de Laureà Bonet, professor de Literatura espanyola a la Universitat de Barcelona, sobre unes converses que va mantenir amb en Joan Ferraté5268.mp4
5268.mp
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
Erratum to: Dynamics and spectrum of the Cesàro operator on C_infty(R+)
No full textAlbanese, A.; Bonet Solves, JA.; Ricker, WJ. (2016). Erratum to: Dynamics and spectrum of the Cesàro operator on C_infty(R+). Monatshefte für Mathematik. 181(4):991-993. https://doi.org/10.1007/s00605-016-0975-0S9919931814Domański, P., Langenbruch, M.: Surjectivity of Euler type differential operators on spaces of smooth functions. Poznań (2016, Preprint
Evolución tipológica de cubiertas ventiladas ‘a la catalana’ en la obra de Antonio Bonet
No full textIn this study we analyse the evolution of a series of buildings designed by Antonio Bonet that share the same vernacular construction typology: the ‘Catalan’ ventilated roofs. We try to demonstrate the investigatory method of Bonet, who does not regard form in his projects as a purely personal invention. The pattern may mutate or transgress for different reasons, whether to adapt to the technological advances of a building system or to programmatic, topographic or climatic changes.
On the basis of the information in the architect’s archive, we create and present new graphical documentation through the redrawing of his works in order to organise archive material that is difficult to access due its dispersal, different scales and different formats. The present study will enable anyone interested to obtain basic data on each building.En este trabajo analizamos la evolución de una serie de edificios diseñados por Antonio Bonet que comparten una tipología constructiva de origen vernáculo: la cubierta ventilada ‘a la catalana’. Trataremos de demostrar el método investigador de Bonet quien no concibe la forma en sus proyectos como una pura invención personal. El patrón puede mutar o transgredirse por diferentes motivos, ya sea para adaptarse al avance tecnológico de un sistema constructivo, ya sea por adaptaciones topográficas, climáticas o programáticas.
A partir de la información del archivo del arquitecto, elaboramos y presentamos nueva documentación gráfica, a través del redibujado de las obras, con el objetivo de ordenar un material de archivo de difícil acceso por diferentes motivos: dispersión, diferencia de escalas, diferentes soportes gráficos. Con este trabajo, cualquier interesado puede obtener los datos básicos de cada edificio
"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.
Operators acting in sequence spaces generated by dual Banach spaces of discrete Cesàro spaces
No full text[EN] The dual spaces d(p), 1 p) d(r), for 1 <= p < infinity, and the (LB)-spaces d(p-) := boolean OR(1 < r < p) d(r), for 1< p <= infinity, recently introduced and investigated in [11]. Here a detailed study is made of various aspects, such as the spectrum, continuity, compactness,
mean ergodicity and supercyclicity of the Cesàro operator, multiplication operators and inclusion
operators when they act on (and between) such spaces.The research of J. Bonet was partially supported by the projects MTM2016-76647-P and GV Prometeo/2017/102 (Spain).Bonet Solves, JA.; Ricker, WJ. (2021). Operators acting in sequence spaces generated by dual Banach spaces of discrete Cesàro spaces. Functiones et Approximatio Commentarii Mathematici. 64(1):109-139. https://doi.org/10.7169/facm/1907S109139641[1] A.A. Albanese, J. Bonet, W.J. Ricker, Montel resolvents and uniformly mean ergodic semigroups of linear operators, Quaest. Math. 36 (2013), 253–290.[2] A.A. Albanese, J. Bonet, W.J. Ricker, The Cesàro operator in the Fréchet spaces and , Glasgow Math. J. 59 (2017), 273–287.[4] A.A. Albanese, J. Bonet, W.J. Ricker, The Cesàro operator on Korenblum type spaces of analytic functions, Collect. Math. 69 (2018), 263–281.[8] S.V. Astashkin, L. Maligranda, Structure of Cesàro function spaces: a survey, Function Spaces X, pp. 13–40. Banach Center Publ. 102, Polish Acad. Sci. Inst. Math., Warsaw, 2014.[9] G. Bennett, Factorizing the classical inequalities, Mem. Amer. Math. Soc. 120 (576), 1996, 1–130.[10] J. Bonet, W.J. Ricker, Operators acting in the dual spaces of discrete Cesàro spaces, Monatsh. Math. 191 (2020), 487–512.[11] J. Bonet, W.J. Ricker, Fréchet and (LB) sequence spaces induced by dual Banach spaces of discrete Cesàro spaces, Bull. Belg. Math. Soc. Simon Stevin (to appear), arXiv: 2009.01132v1.[12] P.S. Bourdon, N.S. Feldman, J.H. Shapiro, Some properties of -supercyclic operators, Studia Math., 165 (2004), 135–157.[13] G. Crofts, Concerning perfect Fréchet spaces and diagonal transformations, Math. Ann. 182 (1969), 67–76.[14] G.P. Curbera, W.J. Ricker, Solid extensions of the Cesàro operator on and , Integral Equ. Oper. Theory 80 (2014), 61–77.[15] R.E. Edwards, Functional Analysis. Theory and Applications, Holt, Rinehart and Winston, New York-Chicago-San Fransisco, 1965.[16] K.-G. Grosse-Erdmann, The Blocking Technique, Weighted Mean Operators and Hardy's Inequality, Lecture Notes in Math., vol. 1679, Springer Verlag, Berlin Heidelberg, 1998.[17] A. Grothendieck, Topological Vector Spaces, Gordon and Breach, London, 1973.[18] G.H. Hardy, J.E. Littlewood, G. Pólya, Inequalities, Cambridge University Press, Cambridge, 1934.[19] A.A. Jagers, A note on Cesàro sequence spaces, Nieuw, Arch. Wisk. 22 (1974), 113–124.[20] H. Jarchow, Locally Convex Spaces, Teubner, Stuttgart, 1981.[21] G. Köthe, Topological Vector Spaces I, 2nd printing rev., Springer, New York, 1983.[22] G. Köthe, Topological Vector Spaces II, Springer, Berlin, 1979.[23] U. Krengel, Ergodic Theorems, de Gruyter Studies in Mathematics 6, Walter de Gruyter Co., Berlin, 1985.[24] K. Leśnik, L. Maligranda, Abstract Cesàro spaces. Duality, J. Math. Anal. Appl. 424 (2015), 932–951.[25] R. Meise, D. Vogt, Introduction to Functional Analysis, Clarendon Press, Oxford, 1997.[26] A. Rodriguez-Arenas, Some results about diagonal operators on Köthe echelon spaces, Rev. R. Acad. Cienc. Exactas Fís. Nat. Ser. A Math. RACSAM 113 (2019), 2959–2968.[27] A.E. Taylor, Introduction to Functional Analysis, Wiley International Edition, John Wiley & Sons, Tokyo, 1958.[28] L. Waelbroeck, Topological Vector Spaces and Algebras, Lecture Notes in Math., vol. 230, Springer, Berlin, 1971.[3] A.A. Albanese, J. Bonet, W.J. Ricker, The Fréchet spaces , J. Math. Anal. Appl. 458 (2018), 1314–1323.[5] A.A. Albanese, J. Bonet, W.J. Ricker, Operators on the Fréchet sequence spaces , Rev. R. Acad. Cienc. Exactas Fís. Nat. Ser. A Mat. RACSAM 113 (2019), 1533–1556.[6] A.A. Albanese, J. Bonet, W.J. Ricker, Multiplier and averaging operators in the Banach spaces , Positivity 23 (2019), 177–193.[7] A.A. Albanese, J. Bonet, W.J. Ricker, Linear operators on the (LB)-sequence spaces , Descriptive topology and functional analysis II, Springer, Cham, Proc. Math. Stat. 286 (2019), 43–67
: Unravelling the Link between Formal Evaluations and Performance‐Based Rewards
No full textWe study whether organizations that reward individual performance should give autonomy or should control how managers evaluate their subordinates. The normal way to establish control is to formalize the evaluations, so that managers cannot choose when and how to evaluate. We argue that organizations face a trade-off because formalization helps reduce biases but also introduces rigidities. Using linked employer-employee data, we study the link between formal performance appraisals and firm financial performance.Jaime Ortega acknowledges financial support from the Spanish Ministry of Economics, Industry and Competitiveness (grants ECO2012-33308 and ECO2015-
2
69615-R). Rocio Bonet acknowledges financial support from the European Commission grant WSCA-Grant Agreement No. 239217-7FP-People-IRG
Sustainable Materials from Textile Waste
No full textThis thesis shows an experimental investigation carried out on different innovative materials based on pre-consumer textile waste. The research was developed at Polytechnic University of Bari (Department of Civil Engineering and Architecture) in collaboration with the Universitat Politècnica de València (Departamento de Ingeniería Textil y Papelera) and with the support of the private clothing manufacturing company Gordon Confezioni s.r.l. (Bari, Italy).
Three groups of non-woven materials were prepared in laboratory using three different binders (i.e. bi-component fibers, chitosan and gum Arabic) and following two different manufacturing processes (chemically gluing and thermally bonding techniques). All materials were tested from several perspectives and their hygrothermal, acoustic and fire resistance behaviour was discussed and correlated with the physical parameters and the non-acoustic properties of the tested materials. Furthermore, the statistical inference was used as method of comparison, generalizing the information contained in laboratory samples. The achieved scientific results allow to state that the proposed materials may represent a valid alternative for building applications, opening a new research area.
After choosing the best performing mixture, the internal atrium of the Architecture’s Building of the Polytechnic University of Bari was selected as case study in order to simulate the effect of different arrangements of the selected material in form of panels. CATT-Acoustic® software and DesignBuilder® software were used to test respectively the acoustic and thermal behaviour of the interested material. Results showed negligible effects on the thermal comfort, but important improvement of the acoustic comfort of the spaces interested by the treatment. Thus, it could be concluded that the conversion of textile residues into secondary raw materials for building components could represent a strategic solution to actualize important circularity objectives, reducing the environmental impacts of the building industry and developing a sustainable management of the textile wastes.
The thesis also includes a part designated to the industrial upscaling of the proposed materials, made possible thanks to the support of the textile machinery manufacturer Cormatex srl (Prato, Italy)
Failure analysis of a Portuguese cultural heritage masterpiece: Bonet building in Sintra
No full textThe paper addresses the failure analysis under horizontal loads of the most ancient body of the National Palace of Sintra, Portugal: the Bonet building. This is a URM construction built on top of Arabic foundations during the reign of King Denis of Portugal around 1281; since then, few alterations have been made to the building. Due to the exemplary conservation of the whole palace, a few crack patterns are identified only on the top floor of the Bonet building, an area that is not open to visitors and that will soon undergo restoration works. The seismic vulnerability assessment of this building is carried out following two different approaches, enacted in two distinct numerical models: the so-called Equivalent Frame Method (EFM) and the Finite Element Method (FEM) developed in 3Muri and ABAQUS software, respectively. Both approaches adopt a numerical procedure based on the use of nonlinear static analyses, introducing “equivalent” boundary conditions that are defined to consider, approximately and conventionally, the possible interaction effects among the different parts of the structure. To minimize the multiple uncertainties usually existing in complex masonry buildings, whether related to geometry or masonry mechanical properties, a detailed structural survey is conducted through the laser scanning technology as well as in situ experimental tests. Different types of experimental tests are carried out, both non- and semi-destructive, including a Ground Penetrating Radar test, ambient vibration tests, flat-jack tests, and the collection of masonry samples. All these tests are important to adequately characterize the building and to calibrate the numerical models. Moreover, these tests enable the extraction of values for the mechanical properties of the rubble stone masonry that are used in the later numerical simulations on the Bonet building and, most importantly, can be used as a reference for future works regarding historical Portuguese monuments of the same period. Afterwards, the results obtained from the nonlinear static analyses with the two different software 3Muri and ABAQUS are presented and discussed. Specifically, the differences in modelling strategies and characterization of materials between the two software are considered with special regard to their feasibility, required computational effort, data availability and applicability to large scale structures. Efforts to calibrate and obtain the same behavior of the building for the different software are made, involving geometry, boundary conditions and characterization of the material constitutive laws. Eventually, a nonlinear dynamic analysis is carried out in ABAQUS to further assess the seismic vulnerability of the Bonet building; a spectrum-compatible accelerogram is applied to the numerical model, and the time-history of displacements in relevant control points of the buildings are extracted and discussed
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
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