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See detailEvery number is the beginning of a power of $2$
Perucca, Antonella UL

E-print/Working paper (n.d.)

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See detailEvery quasitrivial n-ary semigroup is reducible to a semigroup
Couceiro, Miguel; Devillet, Jimmy UL

in Algebra Universalis (2019), 80(4),

We show that every quasitrivial n-ary semigroup is reducible to a binary semigroup, and we provide necessary and sufficient conditions for such a reduction to be unique. These results are then refined in ... [more ▼]

We show that every quasitrivial n-ary semigroup is reducible to a binary semigroup, and we provide necessary and sufficient conditions for such a reduction to be unique. These results are then refined in the case of symmetric n-ary semigroups. We also explicitly determine the sizes of these classes when the semigroups are defined on finite sets. As a byproduct of these enumerations, we obtain several new integer sequences. [less ▲]

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See detailEveryday Cultures and Identities
Baltes-Löhr, Christel UL; Prüm, Agnès UL; Reckinger, Rachel UL et al

in IPSE – Identités, Politiques, Sociétés, Espaces (Ed.) Doing Identity in Luxembourg. Subjective Appropriations – Institutional Attributions – Socio-Cultural Milieus (2011)

Luxembourg – international financial center, European administrative center, destination country for immigration? This empirical study provides insights about a society that has hitherto largely eluded ... [more ▼]

Luxembourg – international financial center, European administrative center, destination country for immigration? This empirical study provides insights about a society that has hitherto largely eluded scientific investigation and observes the processes of identity construction in globalised conditions. The interdisciplinary team of authors exposes the processes of subjective appropriations and institutional attributions at work in the fields of languages, spaces, perceptions of self and others as well as everyday cultures, and identifies for the first time socio-cultural milieus in the Grand Duchy. The findings of the three-year research project uncover the ambivalences and dynamics of a multicultural and multilingual society. [less ▲]

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See detailEveryday Economic Practices as Processes of Regionalisations
Faller, Fabian UL

Scientific Conference (2013, April 12)

For rural areas the utilisation of renewable energies can support a prosperous development. Economic practices are increasingly important for understanding changes in this sector. The interplay of ... [more ▼]

For rural areas the utilisation of renewable energies can support a prosperous development. Economic practices are increasingly important for understanding changes in this sector. The interplay of economic practices with corporate and governmental policies is related to questions of space and scale, such as: which everyday economic practices form energy markets changes; which conditions frame regional policies and practices; which processes of regionalisations evolve? The core interests of the paper are to analyse processes of constitution and reproduction of different types of energy regions and markets, and how practices and policies of such “energetic regionalisations“ intertwine – applying a multi-theory and multi-method (Interviews, Document Analysis) approach, focussing on biogas production in Luxembourg and Germany. I examine institutional and structural conditions that frame processes of regionalisations in the biogas economy and how these relate to socio-technical developments – based on evolutionary institutionalism and socio-technical transition studies. Important elements are: (1) The dynamic dimension of frameworks; (2) the concurrence of political, social, economic and technical processes; (3) the spatial differences of energy related policies. Economic practices in the biogas economy (e.g. by operators, investors) are another part of investigation - following the theory of Everyday Regionalisations. The important elements here are: (1) The constitution and reproduction of regions through economic practices; and (2) the threefold relationship between economic practices and governmental energy policies as: (a) policies supporting or restricting practices; (b) practices producing and restructuring policies – and regional markets; and (c) policies as environmental drivers for practices – and vice versa. The paper focuses on the conceptual framework of an ongoing research project. Preliminary results from the field study will be presented. [less ▲]

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See detailEverything is illuminated. Zur numerischen Analyse von Farbigkeit in Filmen
Pause, Johannes UL; Walkowski, Niels-Oliver UL

in Zeitschrift für digitale Geisteswissenschaften (2018)

The article analyses the composition of colour in the mise-en-scène of the zombie-movies REC, 28 Days Later and World War Z via a computer based approach. It first evaluates some of the methodological ... [more ▼]

The article analyses the composition of colour in the mise-en-scène of the zombie-movies REC, 28 Days Later and World War Z via a computer based approach. It first evaluates some of the methodological problems of common colour-quantisation by using clustering-algorithms in the context of film studies, then a new developed process is presented which builds on the theory of colour contrasts by Johannes Itten. A simple statistical analysis of two contrast ratios for each of the movies demonstrates that this approach is capable of providing detailed insights into the composition of colour in movies in general. Furthermore, the analysis of the three movies reveals that the accentuation of colour contrast relations serves different functions: colours can support the narrative structure of the movie, emphasize repeating motifs or establish an autonomous aesthetic space. [less ▲]

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See detailEvidence based practice in education: Between science and democracy.
Biesta, Gert UL

in Reid, A; Hart, P; Peters, M.A. (Eds.) A Companion to Research in Education (2014)

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See detailL’évidence des photos aériennes d’Auschwitz
Roelens, Nathalie UL

in Recherches Sémiotiques / Semiotic Inquiry (2011), 28(1-2), 137152

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See detail«L'évidence des photos aériennes d'Auschwitz»
Roelens, Nathalie UL

in Cahier international Etudes sur le témoignage audiovisuel des victimes des crimes et génocides nazis (2008)

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See detailEvidence for a core–shell configuration in Tb-doped KY3F10 nanoparticles using synchrotron x-ray line profile and pair distribution function analyses
Ichikawa, Rodrigo; Linhares, Horacio; Peral Alonso, Inmaculada UL et al

in Materials Research Express (2018), Volume 5(Number 1),

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See detailEvidence for a direct effect of the NAD+ precursor acipimox on muscle mitochondrial function in humans.
van de Weijer, Tineke; Phielix, Esther; Bilet, Lena et al

in Diabetes (2015), 64(4), 1193-201

Recent preclinical studies showed the potential of nicotinamide adenine dinucleotide (NAD(+)) precursors to increase oxidative phosphorylation and improve metabolic health, but human data are lacking. We ... [more ▼]

Recent preclinical studies showed the potential of nicotinamide adenine dinucleotide (NAD(+)) precursors to increase oxidative phosphorylation and improve metabolic health, but human data are lacking. We hypothesize that the nicotinic acid derivative acipimox, an NAD(+) precursor, would directly affect mitochondrial function independent of reductions in nonesterified fatty acid (NEFA) concentrations. In a multicenter randomized crossover trial, 21 patients with type 2 diabetes (age 57.7 +/- 1.1 years, BMI 33.4 +/- 0.8 kg/m(2)) received either placebo or acipimox 250 mg three times daily dosage for 2 weeks. Acipimox treatment increased plasma NEFA levels (759 +/- 44 vs. 1,135 +/- 97 mumol/L for placebo vs. acipimox, P < 0.01) owing to a previously described rebound effect. As a result, skeletal muscle lipid content increased and insulin sensitivity decreased. Despite the elevated plasma NEFA levels, ex vivo mitochondrial respiration in skeletal muscle increased. Subsequently, we showed that acipimox treatment resulted in a robust elevation in expression of nuclear-encoded mitochondrial gene sets and a mitonuclear protein imbalance, which may indicate activation of the mitochondrial unfolded protein response. Further studies in C2C12 myotubes confirmed a direct effect of acipimox on NAD(+) levels, mitonuclear protein imbalance, and mitochondrial oxidative capacity. To the best of our knowledge, this study is the first to demonstrate that NAD(+) boosters can also directly affect skeletal muscle mitochondrial function in humans. [less ▲]

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See detailEvidence for a workspace model of working memory from semantic implicit processing in neglect.
Della Sala, Sergio; Van Der Meulen, Marian UL; Bestelmeyer, Patricia et al

in Journal of Neuropsychology (2010), 4(2), 147-166

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See detailEvidence for an asociation betwen an enhanced reactivity of interleukin-6 levels and reduced glucocorticoid sensitivity in patients with fibromyalgia
Geiss, Andrea; Rohleder, Nicolas; Anton, Fernand UL

in Psychoneuroendocrinology (2012), 37(5), 671-684

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See detailEvidence for individual face discrimination in non-face selective areas of the visual cortex in acquired prosopagnosia
Dricot, Laurence; Sorger, Bettina; Schiltz, Christine UL et al

in Behavioral Neurology (2008), 19(1-2), 75-79

Two areas in the human occipito-temporal cortex respond preferentially to faces: 'the fusiform face area' ('FFA') and the 'occipital face area' ('OFA'). However, it is unclear whether these areas have an ... [more ▼]

Two areas in the human occipito-temporal cortex respond preferentially to faces: 'the fusiform face area' ('FFA') and the 'occipital face area' ('OFA'). However, it is unclear whether these areas have an exclusive role in processing faces, or if sub-maximal responses in other visual areas such as the lateral occipital complex (LOC) are also involved. To clarify this issue, we tested a brain-damaged patient (PS) presenting a face-selective impairment with functional magnetic resonance imaging (fMRI). The right hemisphere lesion of the prosopagnosic patient encompasses the 'OFA' but preserves the 'FFA' and LOC. Using fMRI-adaptation, we found a larger response to different faces than repeated faces in the ventral part of the LOC both for normals and the patient, next to her right hemisphere lesion. This observation indicates that following prosopagnosia, areas that do not respond preferentially to faces such as the ventral part of the LOC (vLOC) may still be recruited to subtend residual perception of individual faces. [less ▲]

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See detailEvidence for low temperature phase transition in Rb2ZnCl4 from dielectric constant and birefringence measurements
Günter, P.; Sanctuary, Roland UL; Rohner, F. et al

in Solid State Communications (1981), 37(11), 883-888

Temperature dependences of the dielectric constants [epsilon]i and of the birefringences [Delta]ni for light propagation directions along all the three crystallographic axes (i = a, b, c) have been ... [more ▼]

Temperature dependences of the dielectric constants [epsilon]i and of the birefringences [Delta]ni for light propagation directions along all the three crystallographic axes (i = a, b, c) have been measured between 5 and 350 K. The optical measurements clearly reveal a new phase transition at TL = 75 K, below which the crystal structure is transformed from the ferroelectric Pna21 phase into an unknown low temperature phase, possibly the monoclinic space group P1121. Small peaks in the dielectric constants [epsilon]a and [epsilon]b have been observed at this transition temperature. [less ▲]

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See detailEvidence for structural transformations in polymer melts
Krüger, Jan-Kristian UL; Peetz, L.; Wildner, W. et al

in Polymer (2009), 21(6), 620-626

Crystallizing and non-crystallizing polymers have been investigated by Brillouin spectroscopy in the liquid state. The temperature gradient of the sound velocity of crystallizing polymers shows a ... [more ▼]

Crystallizing and non-crystallizing polymers have been investigated by Brillouin spectroscopy in the liquid state. The temperature gradient of the sound velocity of crystallizing polymers shows a discontinuity at ~60-110K above the melting transition. The non-crystallizing polymers investigated show no uniform behaviour. We interpret the phase between the melt temperature and the temperature of the additional transformation as a phase of locally nematic structure. This interpretation is also supported by a study of density, refractive index, viscosity and hypersonic attenuation. [less ▲]

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See detailEvidence for the formation of nanoprecipitates with magnetically disordered regions in bulk Ni50Mn45In5 Heusler alloys
Benacchio, G.; Titov, Ivan UL; Malyeyev, Artem UL et al

in Physical Review. B, Condensed Matter and Materials Physics (2019), 99

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See detailEvidence for the homothetic scaling of urban forms
Lemoy, Rémi UL; Caruso, Geoffrey UL

Scientific Conference (2017, September)

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See detailEvidence for the homothetic scaling of urban forms
Lemoy, Rémi UL; Caruso, Geoffrey UL

in Environment and Planning B: Urban Analytics and City Science (2018)

The size and form of cities influence their social and environmental impacts. Whether cities have the same form irrespective of their size is still an open question. We analyse the profile of artificial ... [more ▼]

The size and form of cities influence their social and environmental impacts. Whether cities have the same form irrespective of their size is still an open question. We analyse the profile of artificial land and population density, with respect to the distance to their main centre, for the 300 largest European cities. Our analysis combines the GMES/Copernicus Urban Atlas 2006 land use database at 5 m resolution for 300 larger urban zones with more than 100,000 inhabitants and the Geostat population grid at 1 km resolution. We find a remarkable constancy of radial profiles across city sizes. Artificial land profiles scale in the two horizontal dimensions with the square root of city population, while population density profiles scale in three dimensions with its cube root. In short, cities of different size are homothetic in terms of land use and population density, which challenges the idea that larger cities are more parsimonious in the use of land per capita. While earlier literature documented the scaling of average densities (total surface and population) with city size, we document the scaling of the whole radial distance profile with city size, thus liaising intra-urban radial analysis and systems of cities. Our findings also yield homogenous spatial definitions of cities, from which we can re-question urban scaling laws and Zipf’s law for cities. [less ▲]

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See detailEvidence for the interaction of mast cell-degranulating peptide with pertussis toxin-sensitive G proteins in mast cells
Mousli, M.; Bronner, C.; Bueb, Jean-Luc UL et al

in European Journal of Pharmacology (1991), 207(3), 249-55

K(+)-channel blocker properties have been reported for mast cell-degranulating peptide (MCD) in the central nervous system, but its action mechanism in mast cells remains unknown. We studied the effect of ... [more ▼]

K(+)-channel blocker properties have been reported for mast cell-degranulating peptide (MCD) in the central nervous system, but its action mechanism in mast cells remains unknown. We studied the effect of MCD on the membrane potential of rat peritoneal mast cells using the fluorescent probe bis-oxonol. Unexpectedly, MCD induced a decrease in bis-oxonol fluorescence, in a rapid and then a slower phase, suggesting hyperpolarization of mast cells. Other K(+)-channel blockers, tetraethylammonium and 4-aminopyridine, did not significantly modify the bis-oxonol fluorescence and did not alter the effect of MCD. The late phase of bis-oxonol fluorescence decrease was inhibited by ouabain and by potassium deprivation, whereas histamine release was not affected. The first phase of putative hyperpolarization induced by MCD coincided with histamine release and with the generation of inositol polyphosphates. Prior treatment of the cells with pertussis toxin inhibited these effects of MCD. MCD stimulated the GTPase activity of purified G proteins (G0/Gi) in a concentration-dependent manner. These results indicate that the effect of MCD on mast cells is unrelated to K+ channels but that it is relevant to the activation of pertussis toxin-sensitive G proteins leading to the activation of phospholipase C. A direct interaction of MCD with G proteins is proposed, which, unlike mastoparan, does not require positive cooperativity. [less ▲]

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See detailEvidence for the involvement of calcitonin gene-related peptide in the epithelium-dependent contraction of guinea-pig trachea in response to capsaicin
Tschirhart, Eric UL; Bertrand, C.; Theodorsson, E. et al

in Naunyn-Schmiedeberg's Archives of Pharmacology (1990), 342(2), 177-81

Capsaicin (10(-9) to 10(-5) M) contracted guinea-pig tracheal strips. Epithelium-containing tracheal strips developed a maximum active tension which was significantly higher than that observed in ... [more ▼]

Capsaicin (10(-9) to 10(-5) M) contracted guinea-pig tracheal strips. Epithelium-containing tracheal strips developed a maximum active tension which was significantly higher than that observed in epithelium-free strips. Anti-CGRP (calcitonin gene-related peptide) serum blocked the epithelium-dependent potentiation of the capsaicin-induced contraction in the intact tracheal strips, without affecting the response of the epithelium-free strips. This result suggests the occurrence of an epithelium-dependent release of CGRP. This same serum markedly reduced the contraction induced by exogenous rat CGRP in both intact and epithelium-free tracheal strips. In epithelium-free tracheal strips, capsaicin-induced contraction was abolished by spantide (10(-6) and 10(-5) M), a substance P antagonist, but, in intact tracheal strips, spantide did not abolish the capsaicin-induced contraction, showing that both CGRP and substance P release are directly induced by capsaicin. Moreover, the contractile responses to rat CGRP of intact tracheal strips from guinea pig suggest that CGRP itself might be able to release a contracting factor from the airway epithelium. Therefore, CGRP originating from the airway epithelium may play a major role in the control of airway smooth muscle tone. [less ▲]

Detailed reference viewed: 114 (0 UL)