170,881 research outputs found
Validation of electron density and temperature observed by DEMETER
No full textMeasuring electron density (Ne) and temperature (Te) using a DC Langmuir probe in the ionosphere is very often degraded by the electrode contamination. In order to examine the accuracy of DEMETER observations, we compared DEMETER Ne and Te with several other satellites observations and IRI2012 as reference data. DEMETER Ne and Te show well-known dependencies on the solar irradiance except for the range of F10.7 > 100. However, DEMETER Ne are about 70% lower than those of IRI in day time data and its solar irradiance dependency is consistent with the reference data in night time data. It was confirmed that the negative slope appears in deep solar minimum solar cycle 23/24. DEMETER Te are higher than IRI data by 500-1500 K in day time and by 800 K in night time. The relation between Ne and Te is well defined by a negative slope both in DEMETER and IRI during day time, while such a similarity is not recognized in night time data. DEMETER Te is 700 K higher than IRI Te for the same value of Ne. When Ne is less than 10(4) cm(-3) in night time, significant reductions in DEMETER Te are observed, which is close to expected values. Such discrepancies from the reference data and some peculiar behaviors of DEMETER Te and Ne data necessitate a careful attention in using them in consideration of their data alterations. However, their relative variations and averaged behavior in time contain useful information for scientific studies such as dependencies on solar irradiance and wave-4 longitudinal structure under certain conditions (Ne > 10(4) cm(-3) and F10.7 < 100). (C) 2013 COSPAR. Published by Elsevier Ltd. All rights reserved
Conflicting Values of Inquiry: Ideologies of Epistemology in Early Modern Europe
No full textHistorical research in previous decades has done a great deal to explore the social and political context of early modern natural and moral inquiries. Particularly since the publication of Steven Shapin and Simon Schaffer’s Leviathan and the Air-Pump (1985) several studies have attributed epistemological stances and debates to clashes of political and theological ideologies. The present volume suggests that with an awareness of this context, it is now worth turning back to questions of the epistemic content itself. The contributors to the present collection were invited to explore how certain non-epistemic values had been turned into epistemic ones, how they had an effect on epistemic content, and eventually how they became ideologies of knowledge playing various roles in inquiry and application throughout early modern Europ
Demeter and Aspect-Oriented Programming
No full textThe objective of the Demeter method and tools is to improve the productivity of software developers by an order of magnitude. We hope to achieve this through a methodology and tools supported by a theory of adaptive and aspect-oriented programming. To make our results practically useful, we want to leverage existing commercial technology such as Java, the Unified Modeling Language (UML [GRB97]) and design patterns. Our recent work has focused on rethinking our Demeter/C++ tools and the corresponding theory and to implement the new results in Demeter/Java. Demeter/Java is an implementation of Adaptive Programming (AP) for Java. Demeter/Java programs consist of Java code together with programs in a small language to express traversals, visitor methods, and class diagrams. Demeter/Java also includes the coordination aspect Cool and the remote invocation aspect Ridl. Demeter/Java programs are typically written in a preventive maintenance style using traversal strategies for expressing obje..
19. Bohtz (C. H.), Das Demeter-Heiligtum — Altertümer von Pergamon
No full textAnnequin Jacques. 19. Bohtz (C. H.), Das Demeter-Heiligtum — Altertümer von Pergamon. In: Revue des Études Grecques, tome 97, fascicule 460-461, Janvier-juin 1984. pp. 266-267
Thinking Adaptively: the Demeter System
No full texting distribution from the definition of objects and/or functions will be a powerful mechanism to deal with the problems inherent to these applications. The basis for this line of research has already been started, by generating CORBA IDL [OMG91] as an intermediary language for class definitions. Another issue, related with distribution, but not exclusively, is partitioning of adaptive programs into groups of collaborating propagation patterns and groups of collaborating CDGs. The commercial version of Demeter/C++ is managed by Demeter International, Inc. For further information, contact Demeter International, Inc., 56 Bennet Road, Marblehead, MA 01945 USA, (617) 631-9139 or send e-mail to [email protected]. References ..
Logarithmic L p Bounds for Maximal Directional Singular Integrals in the Plane
No full textLet K be a Calderón-Zygmund convolution kernel on R. We discuss the L p -boundedness of the maximal directional singular integral T V f(x)= sup v ε V | ∫R f(x+t v) K(t)dt|where V is a finite set of N directions. Logarithmic bounds (for 2≤p<∞) are established for a set V of arbitrary structure. Sharp bounds are proved for lacunary and Vargas sets of directions. The latter include the case of uniformly distributed directions and the finite truncations of the Cantor set. We make use of both classical harmonic analysis methods and product-BMO based time-frequency analysis techniques. As a further application of the latter, we derive an L p almost orthogonality principle for Fourier restrictions to cones. © 2012 Mathematica Josephina, Inc
Munidopsis demeter Macpherson 2007
No full textMunidopsis demeter Macpherson, 2007 Munidopsis demeter Macpherson, 2007: 63, fig. 30 (Solomon Islands, 400 m). Type data: holotype, female, MNHN Ga 5560. Type locality: Solomon Islands, 6º53´S, 156º21.4´E, 400 m.Published as part of Baba, Keiji, Macpherson, Enrique, Poore, Gary C. B., Ahyong, Shane T., Bermudez, Adriana, Cabezas, Patricia, Lin, Chia-Wei, Nizinski, Martha, Rodrigues, Celso & Schnabel, Kareen E., 2008, Catalogue of squat lobsters of the world (Crustacea: Decapoda: Anomura-families Chirostylidae, Galatheidae and Kiwaidae), pp. 1-220 in Zootaxa 1905 (1) on page 140, DOI: 10.11646/zootaxa.1905.1.1, http://zenodo.org/record/513458
Learning Object-Oriented Software Development with the Demeter Method
No full textWe describe how we teach the Demeter Method for object-oriented software development to undergraduate and graduate students. This paper presents a refinement of the teaching approach outlined in [LR89]. Keywords: Teaching object-oriented design and programming. 1 Introduction The Center for Software Sciences has been actively involved in several industrial, research and teaching projects using object-oriented technology. In this process, the Demeter System for object-oriented analysis, design and programming was developed. The Demeter System consists of the Demeter Method and the Demeter Tools. The Method is programming-language independent; the Tools support the Method on the UNIX operating system. The Demeter System/C++ applies the Method to C++ software development and the Demeter Tools/C++ allow the checking of high-level programs at several levels of abstraction and they provide C++ software for manipulating objects defined by the high-level programs. The research and the develo..
Endpoint Bounds for the Quartile Operator
No full textIt is a result by Lacey and Thiele (Ann. of Math. (2) 146(3):693-724, 1997; ibid. 149(2):475-496, 1999) that the bilinear Hilbert transform maps Lp1(R) × Lp2(R) into Lp1(R) whenever (p1,p2,p3) is a Hölder tuple with p1,p3>1 and p3>2/3. We study the behavior of the quartile operator, which is the Walsh model for the bilinear Hilbert transform, when p3=2/3. We show that the quartile operator maps Lp1(R) × Lp2(R) into L2/3,∞(R) when p1,p2>1 and one component is restricted to subindicator functions. As a corollary, we derive that the quartile operator maps Lp1(R) × Lp2,2/3(R) into L2/3,∞(R). We also provide weak type estimates and boundedness on Orlicz-Lorentz spaces near p1=1,p2=2 which improve, in the Walsh case, the results of Bilyk and Grafakos (J. Geom. Anal. 16 (4):563-584, 2006) and Carro et al. (J. Math. Anal. Appl. 357(2):479-497, 2009). Our main tool is the multi-frequency Calderón-Zygmund decomposition from (Nazarov et al. in Math. Res. Lett. 17(3):529-545, 2010). © 2013 Springer Science+Business Media New York
Development of a European Multi-Model Ensemble System for Seasonal to Inter-Annual Prediction (DEMETER)
No full textA multi-model ensemble-based system for seasonal-to-interannual prediction has been developed in a joint European project known as DEMETER (Development of a European Multimodel Ensemble Prediction System for Seasonal to Interannual Prediction). The DEMETER system comprises seven global atmosphere–ocean coupled models, each running from an ensemble of initial conditions. Comprehensive hindcast evaluation demonstrates the enhanced reliability and skill of the multimodel ensemble over a more conventional single-model ensemble approach. In addition, innovative examples of the application of seasonal ensemble forecasts in malaria and crop yield prediction are discussed. The strategy followed in DEMETER deals with important problems such as communication across disciplines, downscaling of climate simulations, and use of probabilistic forecast information in the applications sector, illustrating the economic value of seasonal-to-interannual prediction for society as a whole
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