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See detailNeoformed mineral phases during clay ceramic firing
El Ouahabi, Meriam ULg; Daoudi, Lachen; Hatert, Frédéric ULg et al

in Clays and Clay Minerals (in press)

Ceramic clays are one of the most complicated ceramic systems because of the very complex relationship between the behavior of minerals during the ceramic processing and the transformations during heating ... [more ▼]

Ceramic clays are one of the most complicated ceramic systems because of the very complex relationship between the behavior of minerals during the ceramic processing and the transformations during heating. A major challenge is to predict the phase transformations in clay ceramics. The aims are to establish reference data of ceramics products that can be formed based on the mineralogical composition of the local raw materials. These data, in turn, can be compared with the archaeological ceramics in order to study their origins. The mineralogical compositions and transformations during the firing (550 to 1100ºC under oxidizing conditions) of seven clayey materials sampled from the main clay deposits of Northern Morocco were evaluated by X-ray powder diffraction. Two groups of clays were evidenced according to the type of neoformed high-temperature minerals: non-calcareous clays and calcareous clays. For the non-calcareous raw materials, spinel is produced at 950°C. Cristobalite and mullite were formed above 1000ºC from clays that contain illite, kaolinite and chlorite. In clays containing vermiculite and high amount of chlorite, hematite was formed from 950°C. Firing of calcareous clays at temperatures > 950ºC yielded Ca-silicates (diopside, gehlenite and wollastonite), spinel, cristobalite, hematite and feldspars. Mullite may also form in the calcareous clay products, when the carbonates content exceeds 10%. [less ▲]

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See detailEfficient standard error formulas of ability estimators with dichotomous item response models
Magis, David ULg

in Psychometrika (in press)

This paper focuses on the computation of asymptotic standard errors (ASE) of ability estimators with dichotomous item response models. A general framework is considered and ability estimators are defined ... [more ▼]

This paper focuses on the computation of asymptotic standard errors (ASE) of ability estimators with dichotomous item response models. A general framework is considered and ability estimators are defined from a very restricted set of assumptions and formulas. This approach encompasses most standard methods such as maximum likelihood, weighted likelihood, maximum a posteriori and robust estimators. A general formula for the ASE is derived from the theory of M-estimation. Well-known results are found back as particular cases for the maximum and robust estimators, while new ASE proposals for the weighted likelihood and maximum a posteriori estimators are presented. These new formulas are compared to traditional ones by means of a simulation study under Rasch modeling. [less ▲]

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See detailThin film superconducting shields
Claassen, John; Osofsky, Michael; Namburi, Devendra et al

in IEEE Transactions on Applied Superconductivity (in press)

To date, magnetic shields utilizing high-temperature superconductor materials mostly comprise bulk materials, usually shaped into a cylinder and then heat treated. We analyze the potential of thin-film ... [more ▼]

To date, magnetic shields utilizing high-temperature superconductor materials mostly comprise bulk materials, usually shaped into a cylinder and then heat treated. We analyze the potential of thin-film technology, whereby a layer of superconductor is deposited on a substrate, to fabricate magnetic shields. Films deposited on a curved surface are inevitably granular, leading to reduced critical current density compared with crystalline films. This limits the maximum field that can be screened. Granular films also have an enhanced penetration depth compared with the bulk value, which determines the maximum possible screening at applied fields below the maximum.We demonstrate the utility of a mutual inductancemeasurement to evaluate small flat test samples of a granular film for their potential as a shielding material in a more complex geometry. Thismeasurement predicts both themaximum magnetic field that can be screened and the residual leakage at fields below the maximum. The tested film was produced by the Electrophoretic deposition of YBCO on a silver substrate. The maximum screening field was comparable with that obtained for a similar film on a cylindrical substrate. We also show comparable results from a crystalline YBCO film. [less ▲]

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See detailBrefs propos introductifs en faveur d'une poétique de l'écart
Havelange, Carl ULg; Molina Marmol, Maïté ULg; Strivay, Lucienne ULg

in Havelange, Carl; Molina Marmol, Maïté; Strivay, Lucienne (Eds.) La lettre et l'iimage. Enquête sur les territoires du visible (in press)

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See detailMétaphysique de la représentation
Havelange, Carl ULg

in Durante, Erica (Ed.) De l'humain au post-humain (in press)

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See detailLe portrait et ses marges
Havelange, Carl ULg

in Bartholeyns, Gil (Ed.) Politiques du visuel (in press)

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See detailРаспространение стоянок ранней поры верхнего палеолита с листовидными остриями на пластинах (Линкомбьен-Ранис-Ежмановице): проблема I культурного слоя Костенок 8
Flas, Damien ULg

in Sinitsyn, A.A.; Bessudnov, A.A. (Eds.) Челидзе Л.М. 2014. Тельманская стоянка и некоторые вопросы развития верхнепалеолитической культуры в Восточной Европе (in press)

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See detailLa lettre et l'image. Enquête sur les territoires du visible
Havelange, Carl ULg; Molina Marmol, Maïté ULg; Strivay, Lucienne ULg

Book published by Presses de l’Université Chouaib Doukkali d’El Jadida (in press)

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See detail“‘Anywhere Out of This World:’ Cognition, Perversion and Arbitrariness in Paul Auster’s Metaphysical Detective Stories”
Dechene, Antoine ULg

in Time, Narrative and Imagination: Essays on Paul Auster (in press)

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See detailMonitoring Antibiotic Use and Residue in Freshwater Aquaculture for Domestic Use in Vietnam
Pham Kim, Dang; Chu, Jacqueline; Nga Thuy, Do et al

in EcoHealth (in press)

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See detailSymboles et abréviation chrétiens dans les papyrus littéraires grecs à contenu profane (IVe-VIIe siècles)
Carlig, Nathan ULg

in Derda, Tomasz; Urbanik, Jakub (Eds.) Acts of the 27th International Congress of Papyrology (Warsaw, 29th July - 3rd August 2013) (in press)

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See detailIntroduction
Dumont, Jonathan ULg; Masson, Christophe ULg

in Moyen Age (Le) (in press), 120(3-4),

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See detailLe pouvoir par les armes, le pouvoir par les idées
Dumont, Jonathan ULg; Masson, Christophe ULg

in Moyen Age (Le) (in press), 120(3-4),

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See detailExploratory Single Grain OSL data analysis of quartz from archeological mortars: on the use of an exponential distribution of light exposure of grains and consequences for dating
Guibert, Pierre; Urbanova, Petra; Blain, Sophie ULg et al

in Radiation Measurements (in press)

Dating archaeological mortar by OSL is one of the challenging objectives leading to the chronology of ancient constructions. Single grain OSL analysis is a very convenient tool to examine the bleaching ... [more ▼]

Dating archaeological mortar by OSL is one of the challenging objectives leading to the chronology of ancient constructions. Single grain OSL analysis is a very convenient tool to examine the bleaching state of the series of quartz grains extracted from a mortar sample. Indeed, during the making process, sand is extracted from a sedimentary source, transported, stored then mixed with lime and set into the walls being constructed. Experience shows that incomplete bleaching is frequent for these materials. The aim of this study is to model the distribution of single grain equivalent doses of mortars following the assumption that a population of grains corresponds to a unique distribution of heterogeneously bleached grains rather than to a mixture of well bleached quartz grains with poorly bleached ones. An exponential distribution of light exposure of grains is examined. By comparing experimental distributions of doses with simulated ones, we investigate the appropriateness of this distribution function and then we calculate the average residual dose integrated into the process of the ED determination and finally the OSL age. Limits and potentials of this approach are discussed using various case-studies of structures and buildings of known age (from the roman to the post-medieval period). Even in case of very poorly bleached samples we observed that the simulated ED distribution fits satisfactorily with the experimental one, which offers new encouraging perspectives in single grain dating of mortars. [less ▲]

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See detailLa UE: un actor de la integración regional de América latina
Parra Santamaria, Lusmiriam Andrea ULg

in LEVI CORRAL, Michel (Ed.) La Unión Europea y la integración en América del Sur, una visión en contexto de la asociación entre bloques regionales (in press)

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See detailAddressing the Specificity of Social Concepts: Rickert, Weber, and the Dual contrast Theory
Dewalque, Arnaud ULg

in Bryan, Ian; Langford, Peter; McGarry, John (Eds.) The Foundation of the Juridico-Political. Concept Formation in Hans Kelsen and Max Weber (in press)

In this chapter, it is argued that Weber's particular combination of Von Kries' naturalistic paradigm and Rickert's antinaturalistic paradigm might become less puzzling if we return to the interpretation ... [more ▼]

In this chapter, it is argued that Weber's particular combination of Von Kries' naturalistic paradigm and Rickert's antinaturalistic paradigm might become less puzzling if we return to the interpretation that emerged in the middle of the nineteen-twenties within the South-Western School of neo-Kantianism. The basic intuition which underlies this interpretation is that the social sciences are best understood as generalizing cultural sciences. On this understanding, they differ both from the natural sciences and the historical sciences. [less ▲]

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See detailM.G. Vassanji’s A Place Within: Thinking through India, Transnationally
Munos, Delphine ULg

in Sayed, Asma; Murji, Karim (Eds.) Diaspora and Literary Politics: The Transnational Imaginaries of MG Vassanji (in press)

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See detailNudge and the Law: What Can EU Law Learn from Behavioural Sciences?
Sibony, Anne-Lise ULg; Alemanno, Alberto

Book published by Hart Publishing (in press)

This book is the first to explore the potential and the challenges of behavioural rule making in an EU context

Detailed reference viewed: 14 (0 ULg)