22,277 research outputs found
Heat Is Not a Metaphor - Alexis Pauline Gumbs
No full text@alexispauline.com Alexis Pauline Gumbs se définit comme fauteuse de trouble noire queer, évangéliste de ce qu’elle nomme Black Feminist Love. Elle est une écrivaine américaine, chercheuse indépendante, poète et activiste. Elle publie ce texte, Heat Is Not a Metaphor, pendant la vague de chaleur de l'été 2023. Je lis ses textes comme je fais la planche à la surface de la mer en bas de chez moi. Un soutien, offert par ce corps aquatique énorme. Une écoute attentive, pour les cliqueticlac océa..
CE Challenges: Work to Do
No full textCE has been used for more than two decades now. Despite many successes and advantages, there are still many challenges to be addressed. These challenges are both technical and organisational. In the paper we will address the current challenges of CE. Many challenges are related to the exchange of data and knowledge and to the systems that make data and knowledge exchange possible. Although much progress has been made in enabling extensive data and knowledge exchange and use, much remains to be wished. For example, there are still barriers to data exchange. Technically, these barriers may consist of different formats, differences in infrastructures and systems, and different semantics. There are also organisational and political barriers. For example, investment in information system may heavily impact upstream suppliers, while revenues of better information exchange may predominantly be gained by downstream actors. Without sharing costs and revenues, chain-wide information exchange will not be easily realised. Another barrier is the possible lack of willingness to share information, because of potential misuse of knowledge and loss of power. The paper is organised as follows. First we will describe the current manifestation of CE as described in a recent book. Second, we will list current trends in CE. Third, we will present some Critical Success Factors (CSFs) that are considered relevant for implementing and adapting CE practices. Last, we indicate some research and practical questions to be addressed, especially for areas that have a high potential and actual impact. </p
DéamBUlation - Performance Pluri-Artistique
No full text"Les arts, les lieux, le rapport à l\u27autre...La rencontre est de tous les champs et de tous les instants, matière plurielle par excellence, "tout autant associée à l\u27éblouissement, à l\u27enthousiasme, au vertige qu\u27au désastre, à la catastrophe, au drame", selon le professeur Dominique Berthet, qui a fait de cette thématique l\u27un des axes forts de ses travaux de recherche. Cette manifestation a été l\u27occasion d\u27une rencontre des arts sous la forme d\u27une performance pluri-artistique intitulée "DéamBUlation". Autour de la question de l\u27accès au savoir (obstacles, embûches, promesses d\u27élévation), Jean-Hugues Miredin et Laurent Troudart (Cie Art&Fact), Yna Boulangé, Fred Lagnau, Michel Beroard et David Gumbs ont associé leurs talents créatifs de danseurs, comédienne, pianiste, plasticien et artiste du numérique en déambulant dans la Bibliothèque universitaire, mettant ainsi en exergue les formes, les symboles et les différents modes d\u27appropriation de ce lieu de toutes les cultures. La performance est suivie d\u27une communication de Dominique Berthet, auteur des textes lus par Yna Boulangé.
Measurement of disorder in non-periodic sequences
No full textAn information theoretic measure is introduced to compare the disorder in non-periodic sequences. It is shown that the measure correctly distinguishes quasiperiodic and aperiodic sequences which have been deduced from earlier studies using diffraction patterns, although it is often necessary to use a set of measures, depending on the order of the source used. The particular sequences studied are the Thue-Morse sequence and the generalizations of the golden mean sequence commonly studied in connection with quasicrystals.PT: J; CR: ALI MK, 1988, PHYS REV B, V38, P7091 BOMBIERI E, 1986, J PHYS-PARIS, V47, P19 BOMBIERI E, 1987, CONT MATH, V64, P241 BURROWS BL, 1989, INT J MATH ED SCI TE, V20, P913 CHENG Z, 1988, PHYS REV B, V37, P4375 GUMBS G, 1988, J PHYS A, V21, L517 GUMBS G, 1988, PHYS REV LETT, V60, P1081 GUMBS G, 1989, J PHYS A-MATH GEN, V22, P951 HAMMING RW, 1980, CODING INFORMATION T HOLZER M, 1988, PHYS REV B, V38, P1709 HOLZER M, 1988, PHYS REV B, V38, P5756 KOLAR M, 1990, PHYS REV B, V41, P7108 KOLAR M, 1991, PHYS REV B, V43, P1034 MA HR, 1988, J PHYS C SOLID STATE, V21, P4311 MERLIN R, 1985, PHYS REV LETT, V55, P1768 MORSE M, 1921, AM J MATH, V43, P35 MORSE M, 1921, T AM MATH SOC, V22, P84 NIU Q, 1986, PHYS REV LETT, V57, P2057 PENROSE R, 1974, B I MATH APPL, V10, P266 QIN MG, 1990, J PHYS-CONDENS MAT, V2, P1059 RIKLUND R, 1987, INT J MOD PHYS B, V1, P121 SHANNON CE, 1949, MATH THEORY COMMUNIC SHECHTMAN D, 1984, PHYS REV LETT, V53, P1951 THUE A, 1906, NORSKE VID SELSK IMN, V7, P1 THUE A, 1912, NORSKE VID SELSK IMN, V1, P1; NR: 25; TC: 13; J9: J PHYS-A-MATH GEN; PG: 9; GA: GC466Source type: Electronic(1
Synthesis optimization and charge carrier transfer mechanism in LiLuSiO<sub>4</sub>:Ce, Tm storage phosphor
No full textLiLuSiO4:Ce and LiLuSiO4:Ce, Tm show very efficient charge carrier storage properties upon beta irradiation after samples have received treatment in vacuum. They outperform the commercial storage phosphor BaFBr(I):Eu2+ in many aspects. The influence of the synthesis conditions, Ce and Tm concentration, nonstoichiometry and codoping with Ca, Hf, Al and Ge are reported. Based on the results of the synthesis optimization, thermoluminescence (TL) emission and TL excitation spectra a mechanism of charge carrier transfer, storage, and recombination during irradiation and thermal or optical readout is proposed.Accepted Author ManuscriptRST/Fundamental Aspects of Materials and EnergyRST/Luminescence Material
The impact of P(NDI2OD-T2) crystalline domains on the open-circuit voltage of bilayer all-polymer solar cells with an inverted configuration
No full textWe fabricated P(NDI2OD-T2)/PTB7 bilayer all-polymer solar cells with an inverted configuration, where the annealing temperature was systematically varied. The current density-voltage behavior was investigated and the structural properties of the P(NDI2OD-T2) layers were characterized. Absorption spectroscopy, surface morphology, and crystallite analysis showed that increasing phase segregation of P(NDI2OD-T2) films occurred as the annealing temperature increased. We found that, as the P(NDI2OD-T2) stacking improved, with larger domains, the open-circuit voltage decreased and the saturation dark current density increased. This work provides a guide for the processing of P(NDI2OD-T2) layers to maximize the power conversion efficiency of all-polymer solar cells. (C) 2015 Author(s).open1186sciescopu
Data and code for: Variational Graph Author Topic Modeling
No full textThis is the tensorflow implementation of KDD-2022 paper "Variational Graph Author Topic Modeling" by Delvin Ce Zhang and Hady W. Lauw.
VGATM is a Graph Neural Network model that extracts interpretable topics for documents with authors and venues. Topics of documents then fulfill document classification, citation prediction, etc.
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Updated analytical solutions of continuity equation for electron beams precipitation – I. Pure collisional and pure ohmic energy losses
No full textWe present updated analytical solutions of continuity equations for power-law beam electrons precipitating in (a) purely collisional losses and (b) purely ohmic losses. The solutions of continuity equation (CE) normalized on electron density presented in Dobranskis & Zharkova are found by method of characteristics eliminating a mistake in the density characteristic pointed out by Emslie et al. The corrected electron beam differential densities (DD) for collisions are shown to have energy spectra with the index of −(γ + 1)/2, coinciding with the one derived from the inverse problem solution by Brown, while being lower by 1/2 than the index of −γ/2 obtained from CE for electron flux. This leads to a decrease of the index of mean electron spectra from −(γ − 2.5) (CE for flux) to −(γ − 2.0) (CE for electron density). The similar method is applied to CE for electrons precipitating in electric field induced by the beam itself. For the first time, the electron energy spectra are calculated for both constant and variable electric fields by using CE for electron density. We derive electron DD for precipitating electrons (moving towards the photosphere, μ = +1) and ‘returning’ electrons (moving towards the corona, μ = −1). The indices of DD energy spectra are reduced from −γ − 1 (CE for flux) to −γ (CE for electron density). While the index of mean electron spectra is increased by 0.5, from −γ + 0.5 (CE for flux) to −γ + 1(CE for electron density). Hard X-ray intensities are also calculated for relativistic cross-section for the updated differential spectra revealing closer resemblance to numerical Fokker–Planck (FP) solutions
Introduction and Author Biographical Notes
No full textThe Introductory Notes include The Cutting EDge\u27s mission statement, editorial board, founder\u27s note, and author\u27s biographies
Recursive procedures for measuring disorder in non-periodic sequences
No full textRecursive procedures are found for calculating the kth-order entropy of non-periodic sequences. These entropies are used as measures of disorder of the sequences and we treat: the Fibonacci sequence and generalizations; the Thue-Morse sequence together with generalizations and the period-doubling sequence. A discussion of the relative ordering of the Thue-Morse and the Fibonacci sequences is given and it is found too simplistic to use any one measure for comparison.PT: J; CR: BURROWS BL, 1991, J PHYS A-MATH GEN, V24, P3979 CHENG Z, 1988, PHYS REV B, V37, P4375 DALLESSANDRO G, 1990, PHYS REV LETT, V64, P1609 GUMBS G, 1989, J PHYS A-MATH GEN, V22, P951 GYORGYI G, 1985, PHYS REV A, V31, P3477 HARTLEY RVL, 1928, BELL SYST TECH J, V7, P535 KHINCHIN AI, 1957, MATH F INFORMATION T KLUIVING R, 1992, PHYSICA A, V183, P405 KLUIVING R, 1992, PHYSICA A, V183, P67 KLUIVING R, 1992, PHYSICA A, V183, P96 QIN MG, 1990, J PHYS-CONDENS MAT, V2, P1059 RIKLUND R, 1987, INT J MOD PHYS B, V1, P121 RYU CS, 1992, PHYS REV B, V46, P5162 RYU CS, 1993, PHYS REV B, V48, P132 SHANNON CE, 1948, BELL SYST TECH J, V27, P379 SHANNON CE, 1948, BELL SYST TECH J, V27, P623 SHANNON CE, 1949, MATH THEORY COMMUNIC WELSH D, 1988, CODES CRYPTOGRAPHY; NR: 18; TC: 6; J9: PHYSICA A; PG: 15; GA: RK763Source type: Electronic(1
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