171,487 research outputs found
Global optimization using q-gradients
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Previous issue date: 2016Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)The q-gradient vector is a generalization of the gradient vector based on the q-derivative. We present two global optimization methods that do not require ordinary derivatives: a q-analog of the Steepest Descent method called the q-G method and a q-analog of the Conjugate Gradient method called the q-CG method. Both q-G and q-CG are reduced to their classical versions when q equals 1. These methods are implemented in such a way that the search process gradually shifts from global in the beginning to almost local search in the end. Moreover, Gaussian perturbations are used in some iterations to guarantee the convergence of the methods to the global minimum in a probabilistic sense. We compare q-G and q-CG with their classical versions and with other methods, including CMA-ES, a variant of Controlled Random Search, and an interior point method that uses finite-difference derivatives, on 27 well-known test problems. In general, the q-G and q-CG methods are very promising and competitive, especially when applied to multimodal problems. (C) 2016 Elsevier B.V. All rights reserved.[Gouvea, Erica J. C.; Soterroni, Aline C.; Scarabello, Marluce C.; Ramos, Fernando M.] Natl Inst Space Res INPE, Lab Comp & Appl Math, Sao Jose Dos Campos, SP, Brazil[Gouvea, Erica J. C.] Universidade de Taubaté (Unitau), Exact Sci Inst[Regis, Rommel G.] St Josephs Univ, Dept Math, Philadelphia, PA 19131 US
Landgraf Carl von Hessen: eine deutsche Regentengeschichte aus dem siebzehnten und achtzehnten Jahrhundert (1677 - 1730)
No full textElektronische Reproduktion von: Landgraf Carl von Hessen : eine deutsche Regentengeschichte aus dem siebzehnten und achtzehnten Jahrhundert (1677 - 1730) / von Christoph v. Rommel. - Cassel : Verlag der Bertram'schen Buchhandlung, 1858. - XVIII, 160 Seiten : 3 Blätter. - (Geschichte von Hessen / durch Christoph Rommel ;; 10) (Geschichte von Hessen seit dem westphälischen Frieden bis jetzt ;; Bd. 2)
Standort: Universität Marburg, Universitätsbibliothek. -
Signatur: VIII C 177, 10. -
Bemerkungen:
(Hassiaca)
Digitalisiert 202
VISOR SISMÓMETRO
No full textEste dataset contiene los archivos necesarios para replicar el programa de Visualización de Datos elaborado en lenguaje Processing. Pero se proporciona la información necesaria del proyecto global. Que consiste de un sistema de digitalización, almacenamiento y visualización de datos proveniente de un geófono tipo SM-6. Se estudió e implementó el diseño del preamplificador presentado por Havskov & Alguacil (2006), y se agregó un sistema de acondicionamiento y filtrado de los datos compuestos por celdas tipo Sallen Key (un filtro pasa bajo y un pasa altos). La digitalización de los datos se realizó mediante una tarjeta de desarrollo PICDEMZ de compañía Microchip; que tiene incorporado un PIC 18F25K20. Para desarrollar el software referente al PIC, se utilizó el IDE MPLAB (MPLABX) de Microchip y el compilador de lenguaje C de Custom Computer Services, Inc. Para almacenar y graficar los datos en un PC vía el puerto serial, se utilizó el lenguaje Processing (The Processing Fundation); implementando un conjunto de 8 script. El prototipo fue iconstruido para participar en la Feria de Ciencias Regional Oriente 2015, convocada en Cumaná (Edo. Sucre., Venezuela). La base teórica del sistema datalogger, está documentada y explicada en el artículo anexo al proyecto: El Sensor Sísmico Geófono; publicada en el blog del autor: https://ciencia.digital.info.ve
Introduction: Locating the Mediterranean
No full textIn recent years, the Mediterranean region has reasserted itself in the world: popular uprisings have unsettled long-standing political regimes, economic crises have generated precarity, and nationalist movements have reified some borders while condemning others. The circulation and stagnation of people, ideas, and objects provoked by these events draw attention to regional connections and separations that, in turn, challenge strict geopolitical renderings of Europe, the Middle East, and North Africa. In considering this resurgence of interest in the Mediterranean, this introduction asks: what role does ‘location’ play in our conception of region and region-formations? What kinds of locations are generated in the contemporary Mediterranean? How do historical, legal, political, and social connections and separations shape the experience of being located somewhere in particular? Furthermore, the introduction explores how, by placing in dialogue diverse approaches and traditions, this collective volume works on two levels at once. First, each contribution posits its own Mediterranean ‘constellation’. Second, the collective volume presents a wider understanding of what historically inclined anthropologists might conceive of as a Mediterranean ‘constellation’. In doing this, the introduction proposes a theoretical apparatus through which we can understand cultural and historical values of region and region-making in and beyond the Mediterranean
Data: Leaching Potential of Heavy Metals from Road-deposited Sediment and Sorptive Media during Dry Periods in Storm Water Quality Improvement Devices
No full textThis dataset contains results of experiments studying the leaching potential of heavy metals from road-deposited sediment (RDS) and three sorptive media (granular activated lignite, granular ferric hydroxide and zeolite) used in storm water quality improvement devices (SQIDs) to retain heavy metals from road runoff. The contaminated RDS and pre-stressed sorptive media were exposed in quiescent batch leaching tests to three different synthetic road runoffs (SRR, SRR+NaCl, SRR+DOM), thereby the effects of de-icing salts and dissolved organic matter were assessed. Samples were withdrawn after (4), 24, 48 and 168 h. The exerted methods are described comprehensively in the associated publication. This dataset contains following items:1. Metal contents of road-deposited sediment and three pre-stressed sorptive media used in SQIDs2. Leachates of RDS: pH, electrical conductivity (EC), UVA254, SUVA254, DOC, dissolved Ca, Cd, Cr, Cu, Fe, Mg, Na, Ni, Pb and Zn, and Cl3. Leachates of three pre-stressed sorptive media: pH, EC, UVA254, DOC, dissolved Cu, Zn, Fe, and C
Philippine security in the age of terror: National, regional, and global challenges in the post-9/11 world
No full textAs the twelfth most populous nation, the Philippines’ diverse religious and ethnic population makes it an ideal example of the changing tenet of what is deemed national security—post 9/11. Issues previously considered social or public are now viewed as security issues. Food production is now analyzed in the context of food security and environmental degradation is now a part of environmental security. This broadened perspective is not unique to the Philippines, but—thanks to the island nation’s long struggle with issues of Muslim radicalism, democracy, and globalization—it serves as a model worth studying. And no one is better positioned to take on this study than Rommel C. Banlaoi, Chairman and Executive Director of the Philippine Institute for Peace, Violence, and Terrorism Research. © 2010 by Taylor & Francis Group, LLC
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
Mitomycin C in highly myopic eyes - Author reply
No full textOphthalmology. 2005 Feb;112(2):208-18; discussion 219.
Mitomycin C modulation of corneal wound healing after photorefractive keratectomy in highly myopic eyes.
Gambato C, Ghirlando A, Moretto E, Busato F, Midena E.
SourceRefractive Surgery Service and Antimetabolite Therapy Research Unit, Department of Ophthalmology, University of Padova, Padova, Italy.
Abstract
PURPOSE: To evaluate the role of topical mitomycin C in corneal wound healing (CWH) after photorefractive keratectomy (PRK) in highly myopic eyes.
DESIGN: Prospective, double-masked, randomized clinical trial.
PARTICIPANTS: Seventy-two eyes of 36 patients affected by high (>7 diopters) myopia.
METHODS: In each patient, one eye was randomly assigned to PRK with intraoperative topical 0.02% mitomycin C application, and the fellow eye was treated with a placebo. Postoperatively, mitomycin C-treated eyes received artificial tears (3 times daily, tapered in 3 months), whereas the fellow eye was treated with fluorometholone sodium 2% and artificial tears (3 times daily, tapered in 3 months).
MAIN OUTCOME MEASURES: Uncorrected visual acuity (UCVA) and best-corrected visual acuity (BCVA), contrast sensitivity, manifest refraction, and biomicroscopy. Contrast sensitivity was determined using the Pelli-Robson chart. Corneal confocal microscopy documented CWH.
RESULTS: Mean follow-up was 18 months (range, 12-36). No side effects or toxic effects were documented. At 12-month follow-up examination, UCVAs (logarithm of the minimum angle of resolution) were 0.4+/-0.48 and 0.5+/-0.53 (P = .03) in mitomycin C-treated eyes and corticosteroid-treated eyes, respectively. At 1 year, corneal haze developed in 20% of corticosteroid-treated eyes, versus 0% of mitomycin C-treated eyes. At 12, 24, and 36 months, corneal confocal microscopy showed activated keratocytes and extracellular matrix significantly more evident in untreated eyes (Ps = 0.004, 0.024, and 0.046, respectively).
CONCLUSION: Topical intraoperative application of 0.02% mitomycin C can reduce haze formation in highly myopic eyes undergoing PRK.
Comment in
Ophthalmology. 2006 Feb;113(2):357; author reply 357-8
Genetic structuring in a Neotropical palm analyzed through an Andean orogenesis-scenario
No full textAndean orogenesis has driven the development of very high plant diversity in the Neotropics through its impact on landscape evolution and climate. The analysis of the intraspecific patterns of genetic structure in plants would permit inferring the effects of Andean uplift on the evolution and diversification of Neotropical flora. In this study, using microsatellite markers and Bayesian clustering analyses, we report the presence of four genetic clusters for the palm Oenocarpus bataua var. bataua which are located within four biogeographic regions in northwestern South America: (a) Chocó rain forest, (b) Amotape-Huancabamba Zone, (c) northwestern Amazonian rain forest, and (d) southwestern Amazonian rain forest. We hypothesize that these clusters developed following three genetic diversification events mainly promoted by Andean orogenic events. Additionally, the distinct current climate dynamics among northwestern and southwestern Amazonia may maintain the genetic diversification detected in the western Amazon basin. Genetic exchange was identified between the clusters, including across the Andes region, discarding the possibility of any cluster to diversify as a distinct intraspecific variety. We identified a hot spot of genetic diversity in the northern Peruvian Amazon around the locality of Iquitos. We also detected a decrease in diversity with distance from this area in westward and southward direction within the Amazon basin and the eastern Andean foothills. Additionally, we confirmed the existence and divergence of O. bataua var. bataua from var. oligocarpus in northern South America, possibly expanding the distributional range of the latter variety beyond eastern Venezuela, to the central and eastern Andean cordilleras of Colombia. Based on our results, we suggest that Andean orogenesis is the main driver of genetic structuring and diversification in O. bataua within northwestern South America
Cabinets in Western Europe
No full textThis is the first-ever presentation of the structure and workings of the national cabinets in Western European countries today; this presentation is based on a common framework which enables the reader to compare their origins, structure, composition and activities of these cabinets and therefore to draw lessons from this comparison. Emphasis is placed on the leadership and on the character of coalitionsIntroduction / Jean Blondel. -- 1. The United Kingdom / Martin Burch. -- 2. Ireland / Brian Farrell. -- 3. The Netherlands / Rudy B. Andeweg. -- 4. Belgium / André-Paul Frognier. -- 5. France / Jean-Louis Thiébault. -- 6. Spain / Antonio Bar. -- 7. Italy / Maurizio Cotta. -- 8. Austria / Peter Gerlich and Wolfgang C. Müller. -- 9. Federal Republic of Germany / Ferdinand Müller-Rommel. -- 10. Denmark / Tove Lise Schou. -- 11. Norway / Svein Eriksen. -- 12. Sweden / Törbjörn Larsson. -- 13. Finland / Jaakko Nousiainen. -- Concluding remarks / Ferdinand Müller-Romme
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