2,575 research outputs found
The chronicle of Alfonson lll and its significance for the historiography of the Asturian kingdom 718-910 AD
No full textThe Asturian kingdom provided the earliest organised
resistance in the Iberian peninsula to the Muslim invaders who overthrew the Visigothic state at the start of the 8th century. Information on the origins of the Asturian kingdom is regrettably sparse. Historians of the kingdom are totally reliant on a late 9th-century cycle of Asturian chronicles associated with the royal court, the most substantial of which is the Chronicle of Alfonso III. This work has survived in two fundamental recensions from the 10th century. Historians' gratitude for its existence is tinged with frustration at its readily apparent weaknesses, such as a chronological imprecision on events and an enigmatic brevity in the commentary.
This thesis considers the 9th-century Asturian chronicles in
the context of their own time. In particular, it examines the Chronicle of Alfonso III not as a disappointing source which fails to yield to modern scholars the information they crave on this obscure period of early Spanish history, but, rather, as an expression of the aims of a medieval author and his copyists. The Chronicle was the product of scarce and valuable resources. Its author, within the limits of his literary ability and source of information, transmitted a message which interacted with the individual understanding of its intended audience. This shift of
emphasis in analysing the Chronicle of Alfonso III rests on the assumption that its original text may be recognised in the later recensions which used it, by addition or omission, as a vehicle for their own interests
Alfonso Garcia Valdecasas Garcia Valdecasas - vita e opera
No full textLa presente tesis doctoral tiene por objetivo analizar la obra y el pensamiento de Alfonso Garcia Valdecasas y Garcia Valdecasas. El estudio se encuadra en el área del derecho romano puesto que él comenzó su carrera como iusromanista, doctorándose en Bolonia como colegial del Real Colegio de España con una tesis dirigida por Emilio Costa. Aquel trabajo recibió el premio Vittorio Emanuele Secondo y, tal y como se demostrará, fue el primer trabajo estrictamente científico de la romanística hispana moderna. Otras publicaciones del autor que se incluyen en el presente trabajo permitirán trazar las líneas del pensamiento jurídico, filosófico y –en parte- político de Alfonso Garcia Valdecasas y Garcia Valdecasas.This PhD thesis aims at analyzing both the work and the thought of Alfonso Garcia-Valdecasas Garcia-Valdecasas. The study is in the field of roman law due to the fact that he started his career as a iusromanist, receiving his PhD in Bologna as a collegiate of the Royal Spanish College with a thesis under the supervision of Professor Emilio Costa. That piece received the Vittorio Emanuele II price and, as it will be demonstrated, it represents the first purely scientific work in the modern hispanic roman law science. Other publications by the author included in this very work will allow to outline the traits of the legal, philosophical and -partly- political thought of Alfonso Garcia-Valdecasas Garcia-Valdecasas.Questa tesi di dottorato ha per obbiettivo analizzare l’opera e il pensiero di Alfonso Garcia-Valdecasas y Garcia-Valdecasas. Lo studio si presenta nell’area del diritto romano poiché egli inizió la sua traiettoria come iusromanista, dottorandosi a Bologna come collegiale del Collegio di Spagna, con una tesi diretta da Emilio Costa. Quel lavoro ricevette il Premio Vittorio Emanuele II e, come si mostrerá, rappresenta il primo lavoro prettamente scientifico della romanistica ispanica moderna. Altre pubblicazioni dell’autore incluse nel presente lavoro permetteranno di delineare i tratti del pensiero giuridico, filosofico e –in parte- político di Alfonso Garcia Valdecasas y Garcia Valdecasas
Sexual dysfunction in Parkinson's disease
No full textSexual dysfunction is one of the more disabling and poorly investigated aspects of PD. Several variables should be considered when evaluating sexual dysfunction in a disease in which physical, psychological, neurobiological and pharmacological features merge and are not easily distinguishable. Although sexual dysfunction is common in Parkinson's disease, the development of hypersexuality and aberrant sexual behaviour, probably due to dopamine replacement therapy, calls into question the role of dopamine in sexual behaviour. This paper reviews studies that have investigated sexual behaviour and dysfunction in PD patients, paying particular attention to the effect of dopamine replacement therapy. (C) 2008 Elsevier Ltd. All rights reserved
High prevalence of extrapyramidal signs and symptoms in a group of Italian dental technicians
No full textAbstract Background Occupational and chronic exposure to solvents and metals is considered a possible risk factor for Parkinson's disease and essential tremor. While manufacturing dental prostheses, dental technicians are exposed to numerous chemicals that contain toxins known to affect the central nervous system, such as solvents (which contain n-hexane in particular) and metals (which contain mercury, iron, chromium, cobalt and nickel). Methods We performed an epidemiological and clinical study on all 27 dental technicians working in a school for dental technicians. We asked all the technicians to fill in a self-administered questionnaire on extrapyramidal symptoms, and the General Health Questionnaire (GHQ), a self-administered screening instrument, to detect any psychiatric disorders. Moreover, we invited all 27 dental technicians to undergo a neurological examination and provide a detailed occupational history in our clinic. Results Of the 14 subjects who underwent the neurological examination, four had postural tremor and one had a diagnosis of Parkinson's disease. Conclusion We found a high prevalence of extrapyramidal signs and symptoms in this group of male dental technicians working in a state technical high school in Rome. We believe that this finding may be due to the presence of toxins in the dental technician's work.</p
Alfonso Shimbel, 1953, Structural Parameters of Communication Networks. Version bilingue et commentée
No full textShimbel, Alfonso. "Structural parameters of communication networks." The bulletin of mathematical biophysics 15 (1953): 501-507.This document of the group fmr presents a bilingual (English-French) and commented version of Alfonso Shimbel's article, Structural Parameters of Communication Networks, published in 1953 in the Bulletin of Mathematical Biophysics. The author pursues the avenues explored in his 1951 article (Application of Matrix Algebra to Communications Nets) and proposes various measures for qualifying a communications network. The indicators of dispersion and accessibility will be widely used, particularly in transport geography.Ce document du groupe fmr présente une version bilingue et commentée de l'article d'Alfonso Shimbel, Structural Parameters of Communication Networks, paru en 1953 dans la revue Bulletin of Mathematical Biophysics. L'auteur poursuit les pistes explorées dans son article de 1951 (Application of Matrix Algebra to Communications Nets) et propose différentes mesures permettant de qualifier un réseau de communication. Les indicateurs de dispersion et d'accessibilité seront largement repris, notamment en géographie des transports
Alfonso Shimbel, 1953, Structural Parameters of Communication Networks. Version bilingue et commentée
No full textShimbel, Alfonso. "Structural parameters of communication networks." The bulletin of mathematical biophysics 15 (1953): 501-507.This document of the group fmr presents a bilingual (English-French) and commented version of Alfonso Shimbel's article, Structural Parameters of Communication Networks, published in 1953 in the Bulletin of Mathematical Biophysics. The author pursues the avenues explored in his 1951 article (Application of Matrix Algebra to Communications Nets) and proposes various measures for qualifying a communications network. The indicators of dispersion and accessibility will be widely used, particularly in transport geography.Ce document du groupe fmr présente une version bilingue et commentée de l'article d'Alfonso Shimbel, Structural Parameters of Communication Networks, paru en 1953 dans la revue Bulletin of Mathematical Biophysics. L'auteur poursuit les pistes explorées dans son article de 1951 (Application of Matrix Algebra to Communications Nets) et propose différentes mesures permettant de qualifier un réseau de communication. Les indicateurs de dispersion et d'accessibilité seront largement repris, notamment en géographie des transports
Alfonso Shimbel, 1951, Applications of Matrix Algebra to Communication Nets. Version bilingue et commentée
No full textShimbel, Alfonso. "Applications of matrix algebra to communication nets." The bulletin of mathematical biophysics 13 (1951): 165-178.This document of the group fmr presents a bilingual (English-French) and commented version of Alfonso Shimbel's article, Applications of Matrix Algebra to Communication Nets, published in 1951 in the Bulletin of Mathematical Biophysics. The author relies on recent work in matrix analysis to propose different measures that can qualify the structure of a communication network. This article serves as a methodological basis for the 1953 article by the same author entitled Structural Parameters of Communication Networks. Although Shimbel never mentions graph theory, several of his proposals have direct applications in network analysis.Ce document du groupe fmr présente une version bilingue et commentée de l'article d'Alfonso Shimbel, Applications of Matrix Algebra to Communication Nets, paru en 1951 dans la revue Bulletin of Mathematical Biophysics. L'auteur s'appuie sur des travaux récents d'analyse matricielle pour proposer différentes mesures susceptibles de qualifier la structure d'un réseau de communication. Cet article sert de base méthodologique à l'article de 1953 du même auteur intitulé Structural Parameters of Communication Networks. Si Shimbel n'évoque à aucun moment la théorie des graphes, plusieurs de ses propositions trouvent des applications directes en analyse de réseau
Alfonso Shimbel, 1951, Applications of Matrix Algebra to Communication Nets. Version bilingue et commentée
No full textShimbel, Alfonso. "Applications of matrix algebra to communication nets." The bulletin of mathematical biophysics 13 (1951): 165-178.This document of the group fmr presents a bilingual (English-French) and commented version of Alfonso Shimbel's article, Applications of Matrix Algebra to Communication Nets, published in 1951 in the Bulletin of Mathematical Biophysics. The author relies on recent work in matrix analysis to propose different measures that can qualify the structure of a communication network. This article serves as a methodological basis for the 1953 article by the same author entitled Structural Parameters of Communication Networks. Although Shimbel never mentions graph theory, several of his proposals have direct applications in network analysis.Ce document du groupe fmr présente une version bilingue et commentée de l'article d'Alfonso Shimbel, Applications of Matrix Algebra to Communication Nets, paru en 1951 dans la revue Bulletin of Mathematical Biophysics. L'auteur s'appuie sur des travaux récents d'analyse matricielle pour proposer différentes mesures susceptibles de qualifier la structure d'un réseau de communication. Cet article sert de base méthodologique à l'article de 1953 du même auteur intitulé Structural Parameters of Communication Networks. Si Shimbel n'évoque à aucun moment la théorie des graphes, plusieurs de ses propositions trouvent des applications directes en analyse de réseau
Hierarchical Consensus: A Horizontal Scaling Framework for Blockchains (Invited Talk)
No full textIn this talk we present the Filecoin Hierarchical Consensus framework, which aims to overcome the throughput challenges of blockchain consensus by horizontally scaling the network. Unlike traditional sharding designs, based on partitioning the state of the network, our solution centers on the concept of subnets –which are organized hierarchically– and can be spawned on-demand to manage new state. Child subnets are firewalled from parent subnets, have their own specific policies, and run a different consensus algorithm, increasing the network capacity and enabling new applications. Moreover, they benefit from the security of parent subnets by periodically checkpointing state. In this paper, we introduce the overall system architecture, our detailed designs for cross-net transaction handling, and the open questions that we are still exploring.
Author Bio. Before joining Protocol Labs, Alfonso worked as a blockchain expert at Telefónica R&D, where he was responsible for the design and development of core technology based on blockchains, distributed systems, and advanced cryptography. Alfonso’s involvement in research and development began at Universidad Politécnica de Madrid, where he worked on topics related to energy efficiency in data centers. His broad R&D experience also includes research into the compression efficiency of video coding standards at Ericsson Research and projects related to securing interdomain routing protocols at KTH Royal Institute of Technology in Stockholm. https://research.protocol.ai/authors/alfonso-delarocha
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