Solar gravitational energy and luminosity variations (2009)
Fazel, Z., Rozelot, J. P., Lefebvre, S., Ajabshirizadeh, A., Pireaux, S.
Due to non-homogeneous mass distribution and non-uniform velocity rate inside the Sun, the solar outer shape is distorted in latitude. In this paper, we analyze the consequences of a temporal change...
Variations of the solar granulation motions with height using the GOLF/SoHO experiment (2008)
Lefebvre, S., Garcia, R. A., Jimenez-Reyes, S. J., Turck-Chieze, S., Mathur, S.
Below 1 mHz, the power spectrum of helioseismic velocity measurements is dominated by the spectrum of convective motions (granulation and supergranulation) making it difficult to detect the low-order...
N. Tsingos, C. Dachsbacher, S. Lefebvre, M. Dellepiane
Real-time sound rendering engines often render occlusion and early sound reflection effects using geometrical techniques such as ray or beam tracing. They can only achieve interactive rendering for...
LEAL, J, DUBOIS, Stanislas, ORVAIN, Francis, GALOIS, Robert, BLIN, J, ROPERT, Michel, ...
Food sources for cultivated marine bivalves generally are not well identified, although they are essential for a better understanding of coastal ecosystems and for the sustainability of shellfish...
Helioseismic test of non-homologous solar radius changes with the 11-year activity cycle (2007)
Lefebvre, S., Kosovichev, A. G., Rozelot, J. P.
Recent models of variations of the Sun's structure with the 11-year activity cycle by Sofia et al (2005) predict strong non-homologous changes of the radius of subsurface layers, due to subsurface...
The Sun Asphericities: Astrophysical Relevance (2006)
Rozelot, J-P., Pireaux, S., Lefebvre, S., Corbard, T.
Of all the fundamental parameters of the Sun (diameter, mass, temperature...), the gravitational multipole moments (of degree l and order m) that determine the solar moments of inertia, are still...
Rozelot, J. P., Lefebvre, S., Pireaux, S., Ajabshirizadeh, A.
Irradiance variability has been monitored from space for more than two decades. Even if data are coming from different sources, it is well established that a temporal variability exists which can be...
Hamad, I. J., Trumper, A. E., Wzietek, P., Lefebvre, S., Manuel, L. O.
We study the role played by the magnetic frustration in the antiferromagnetic phase of the organic salt \kappa-(BEDT-TTF)_ 2 Cu [N(CN)_2] Cl. Using the spatially anisotropic triangular Heisenberg...
The Sun Asphericities: Astrophysical Relevance (2004)
Rozelot, J-P., Pireaux, S., Lefebvre, S., Corbard, T.
Of all the fundamental parameters of the Sun (diameter, mass, temperature...), the gravitational multipole moments (of degree l and order m) that determine the solar moments of inertia, are still...
The Sun Asphericities: Astrophysical Relevance (2004)
Rozelot, J-P., Pireaux, S., Lefebvre, S., Corbard, T.
Of all the fundamental parameters of the Sun (diameter, mass, temperature...), the gravitational multipole moments (of degree l and order m) that determine the solar moments of inertia, are still...
The Sun Asphericities: Astrophysical Relevance (2004)
Rozelot, J-P., Pireaux, S., Lefebvre, S., Corbard, T.
Of all the fundamental parameters of the Sun (diameter, mass, temperature...), the gravitational multipole moments (of degree l and order m) that determine the solar moments of inertia, are still...
Lefebvre, S., Wzietek, P., Brown, S., Bourbonnais, C., Jerome, D., Meziere, C., ...
The phase diagram of the layered organic superconductor $\kappa$-(ET)$_{2}$Cu[N(CN)$_{2}$]Cl has been accurately measured from a combination of $^{1}$H NMR and AC susceptibility techniques under...
Giant magnetoresistance in Fe Cr superlattices with and without bulk scattering (1999)
Belien, P, Verbanck, G, Fischer, H, Lefebvre, S, ...
Giant magnetoresistance (GMR) observed in magnetic multilayers is due to spin-dependent electron scattering at interfaces and bulk defects. In order to separate these two possible contributions we...
Schad, R, Belien, P, Verbanck, G, Moshchalkov, VV, Bruynseraede, Yvan; U0011882, Fischer, HE, ...
The giant magnetoresistance (GMR) observed in magnetic multilayers, is due to spin-dependent electron transport. In order to study the influence of the interface roughness on the spin-dependent...
Schad, R, Belien, P, Verbanck, G, Potter, CD, Fischer, H, Lefebvre, S, ...
We present a quantitative characterization of the interface roughness of Fe/Cr superlattices based on specular and off-specular x-ray diffraction using anomalous scattering, We discuss the dependence...
Quantitative interface roughness analysis of Fe/Cr superlattices (1998)
Belien, P, Verbanck, G, Moshchalkov, VV, ...
The quantitative characterization of the interface roughness of Fe/Cr superlattices is necessary for the understanding of the transport properties of such structures. This must include both vertical...
EXAFS Evidence of a Phase Transition in Icosahedral AlLiCu Quasicrystals under High Pressure (1997)
Sadoc, A., Itié, J., Polian, A., Lefebvre, S.
In situ EXAFS studies, performed at the Cu K absorption edge, are reported for icosahedral Al6Li3Cu quasicrystals frorn ambient pressure up to 33 GPa. The increase in the average distance of first...
EXAFS Evidence of a Phase Transition in Icosahedral AlLiCu Quasicrystals under High Pressure (1997)
Sadoc, A., Itié, J., Polian, A., Lefebvre, S.
In situ EXAFS studies, performed at the Cu K absorption edge, are reported for icosahedral Al6Li3Cu quasicrystals frorn ambient pressure up to 33 GPa. The increase in the average distance of first...
EXAFS Evidence of a Phase Transition in Icosahedral AlLiCu Quasicrystals under High Pressure (1997)
Sadoc, A., Itié, J., Polian, A., Lefebvre, S.
In situ EXAFS studies, performed at the Cu K absorption edge, are reported for icosahedral Al6Li3Cu quasicrystals frorn ambient pressure up to 33 GPa. The increase in the average distance of first...
Schad, R, Barnas, J, Belien, P, Verbanck, G, Potter, CD, Fischer, H, ...
We present a detailed study of the influence of the interface properties on the amplitude of the GMR in Fe/Cr superlattices, including changes of the coupling, a synchrotron X-ray diffraction...
Renaud, G., Belakhovsky, M., Lefebvre, S., Bessière, M.
A quantitative analysis of the X-ray diffuse intensity scattered by an Au80Ni20 single-crystal was performed, in its metastable, homogeneous state, characteristic of the temperature of 520 K. An...
Renaud, G., Belakhovsky, M., Lefebvre, S., Bessière, M.
A quantitative analysis of the X-ray diffuse intensity scattered by an Au80Ni20 single-crystal was performed, in its metastable, homogeneous state, characteristic of the temperature of 520 K. An...
Renaud, G., Belakhovsky, M., Lefebvre, S., Bessière, M.
A quantitative analysis of the X-ray diffuse intensity scattered by an Au80Ni20 single-crystal was performed, in its metastable, homogeneous state, characteristic of the temperature of 520 K. An...
Interfacial structure and giant magnetoresistance in fe/cr superlattices (1994)
Fischer, He, Petroff, F, Belien, P, Lequien, S, Verbanck, G, Bruynseraede, Yvan; U0011882, ...
A correlation between interfacial structure and giant magnetoresistance (GMR) has been established for Fe/Cr superlattices [1-8]. However, previous studies were qualitative in that the interfacial...
Guillet, F., CÉnÉdÈse, P., Calvayrac, Y., BessiÈre, M., Lefebvre, S.
Cette étude concerne la caractérisation de l'ordre local dans une phase Ni2CoCr modèle de la phase γ des superalliages. Des mesures de diffusion diffuse anomale ont été effectuées à...
Interfacial structure and giant magnetoresistance in Fe/Cr superlattices (1994)
Fischer, H., Petroff, F., Beliën, P., Lequien, S., Verbanck, G., Bruynseraede, Y., ...
A correlation between interfacial structure and giant magnetoresistance (GMR) has been established for Fe/Cr superlattices [l-8]. However, previous studies were qualitative in that the interfacial...
Bessière, M., Lefebvre, S., Lemonnier, M., Bley, F., Lequien, S.
Anomalous X-ray scattering provides a useful way for improving the contrast between different atoms present in multi-element samples. To take full advantage of this technique, the detector has to...
Guillet, F., CÉnÉdÈse, P., Calvayrac, Y., BessiÈre, M., Lefebvre, S.
Cette étude concerne la caractérisation de l'ordre local dans une phase Ni2CoCr modèle de la phase γ des superalliages. Des mesures de diffusion diffuse anomale ont été effectuées à...
Interfacial structure and giant magnetoresistance in Fe/Cr superlattices (1994)
Fischer, H., Petroff, F., Beliën, P., Lequien, S., Verbanck, G., Bruynseraede, Y., ...
A correlation between interfacial structure and giant magnetoresistance (GMR) has been established for Fe/Cr superlattices [l-8]. However, previous studies were qualitative in that the interfacial...
Bessière, M., Lefebvre, S., Lemonnier, M., Bley, F., Lequien, S.
Anomalous X-ray scattering provides a useful way for improving the contrast between different atoms present in multi-element samples. To take full advantage of this technique, the detector has to...
Guillet, F., CÉnÉdÈse, P., Calvayrac, Y., BessiÈre, M., Lefebvre, S.
Cette étude concerne la caractérisation de l'ordre local dans une phase Ni2CoCr modèle de la phase γ des superalliages. Des mesures de diffusion diffuse anomale ont été effectuées à...
Interfacial structure and giant magnetoresistance in Fe/Cr superlattices (1994)
Fischer, H., Petroff, F., Beliën, P., Lequien, S., Verbanck, G., Bruynseraede, Y., ...
A correlation between interfacial structure and giant magnetoresistance (GMR) has been established for Fe/Cr superlattices [l-8]. However, previous studies were qualitative in that the interfacial...
Bessière, M., Lefebvre, S., Lemonnier, M., Bley, F., Lequien, S.
Anomalous X-ray scattering provides a useful way for improving the contrast between different atoms present in multi-element samples. To take full advantage of this technique, the detector has to...
Inelastic neutron scattering study of icosahedral AlFeCu quasicrystal (1992)
Quilichini, M., Hennion, B., Heger, G., Lefebvre, S., Quivy, A.
Dynamical properties of quasiperiodic structures are rather tricky and far from being understood. For quasicrystals only little information is available both theoretically and experimentally. In this...
Inelastic neutron scattering study of icosahedral AlFeCu quasicrystal (1992)
Quilichini, M., Hennion, B., Heger, G., Lefebvre, S., Quivy, A.
Dynamical properties of quasiperiodic structures are rather tricky and far from being understood. For quasicrystals only little information is available both theoretically and experimentally. In this...
Inelastic neutron scattering study of icosahedral AlFeCu quasicrystal (1992)
Quilichini, M., Hennion, B., Heger, G., Lefebvre, S., Quivy, A.
Dynamical properties of quasiperiodic structures are rather tricky and far from being understood. For quasicrystals only little information is available both theoretically and experimentally. In this...
Thermal stability of Al-Cu-Fe icosahedral alloys (1991)
Bessière, M., Quivy, A., Lefebvre, S., Devaud-Rzepski, J., Calvayrac, Y.
A stable ideally quasiperiodic phase exists in a small range of concentration, close to the composition Al62Cu25.5Fe12.5. Reducing the iron content, or replacing small amounts of copper by aluminium,...
Thermal stability of Al-Cu-Fe icosahedral alloys (1991)
Bessière, M., Quivy, A., Lefebvre, S., Devaud-Rzepski, J., Calvayrac, Y.
A stable ideally quasiperiodic phase exists in a small range of concentration, close to the composition Al62Cu25.5Fe12.5. Reducing the iron content, or replacing small amounts of copper by aluminium,...
Thermal stability of Al-Cu-Fe icosahedral alloys (1991)
Bessière, M., Quivy, A., Lefebvre, S., Devaud-Rzepski, J., Calvayrac, Y.
A stable ideally quasiperiodic phase exists in a small range of concentration, close to the composition Al62Cu25.5Fe12.5. Reducing the iron content, or replacing small amounts of copper by aluminium,...
Icosahedral AlCuFe alloys : towards ideal quasicrystals (1990)
Calvayrac, Y., Quivy, A., Bessière, M., Lefebvre, S., Cornier-Quiquandon, M., Gratias, D.
The topological and chemical long range orders in the icosahedral Al 65Cu20Fe15 alloy have been studied by X-ray powder diffraction. The spectacular enhancement of the quasicrystal-line state by...
Inelastic neutron scattering study of acoustic modes in a monodomain AlCuFe quasicrystal (1990)
Quilichini, M., Heger, G., Hennion, B., Lefebvre, S., Quivy, A.
Inelastic neutron scattering results evidenced for the first time that acoustic phonon modes can be observed for a quasicrystal. The triple-axes experiments have been performed on a small monodomain...
Icosahedral AlCuFe alloys : towards ideal quasicrystals (1990)
Calvayrac, Y., Quivy, A., Bessière, M., Lefebvre, S., Cornier-Quiquandon, M., Gratias, D.
The topological and chemical long range orders in the icosahedral Al 65Cu20Fe15 alloy have been studied by X-ray powder diffraction. The spectacular enhancement of the quasicrystal-line state by...
Inelastic neutron scattering study of acoustic modes in a monodomain AlCuFe quasicrystal (1990)
Quilichini, M., Heger, G., Hennion, B., Lefebvre, S., Quivy, A.
Inelastic neutron scattering results evidenced for the first time that acoustic phonon modes can be observed for a quasicrystal. The triple-axes experiments have been performed on a small monodomain...
Icosahedral AlCuFe alloys : towards ideal quasicrystals (1990)
Calvayrac, Y., Quivy, A., Bessière, M., Lefebvre, S., Cornier-Quiquandon, M., Gratias, D.
The topological and chemical long range orders in the icosahedral Al 65Cu20Fe15 alloy have been studied by X-ray powder diffraction. The spectacular enhancement of the quasicrystal-line state by...
Inelastic neutron scattering study of acoustic modes in a monodomain AlCuFe quasicrystal (1990)
Quilichini, M., Heger, G., Hennion, B., Lefebvre, S., Quivy, A.
Inelastic neutron scattering results evidenced for the first time that acoustic phonon modes can be observed for a quasicrystal. The triple-axes experiments have been performed on a small monodomain...
Programs for the Study of Hvdc Systems (1988)
CHAPMAN, D.G., DAVIES, J.B., Alvarado, Fernando L., Lasseter, Robert H., LEFEBVRE, S., KRISHNAYYA, P.C.S., ...
This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying...
Renaud, G., Belakhovsky, M., Hillairet, J., Wuttig, M., Bessenay, G., Lefebvre, S.
This paper reports the results of combined measurements of the resistivity and anelasticity of Au3Cu and Au70Ni30 alloys. The data show anomalies above the critical temperature for long range order...
Renaud, G., Belakhovsky, M., Hillairet, J., Wuttig, M., Bessenay, G., Lefebvre, S.
This paper reports the results of combined measurements of the resistivity and anelasticity of Au3Cu and Au70Ni30 alloys. The data show anomalies above the critical temperature for long range order...
Renaud, G., Belakhovsky, M., Hillairet, J., Wuttig, M., Bessenay, G., Lefebvre, S.
This paper reports the results of combined measurements of the resistivity and anelasticity of Au3Cu and Au70Ni30 alloys. The data show anomalies above the critical temperature for long range order...
Study of local order in Au75Cu25 and Au70Cu 30. Results of diffuse scattering measurements (1986)
Bessière, M., Calvayrac, Y., Lefebvre, S., Gratias, D., Cénédèse, P.
Local order in Au75Cu25 and Au70Cu 30 has been investigated by X-ray diffuse scattering from single crystals quenched from T/Tc ≃ 1.03 and 1.2 (T c: transition temperature between long range...
STUDY OF SHORT RANGE ORDER IN Au3 Cu BY EXAFS (1986)
Bessiere, M., Dartyge, E., Lefebvre, S.
The purpose of this study is to determine if EXAFS is a suitable method to investigate the short range order (SRO) in concentrated solid solutions. Two s.r.o. Au3Cu samples annealed at T/TC=1.02 and...
Study of local order in Au75Cu25 and Au70Cu 30. Results of diffuse scattering measurements (1986)
Bessière, M., Calvayrac, Y., Lefebvre, S., Gratias, D., Cénédèse, P.
Local order in Au75Cu25 and Au70Cu 30 has been investigated by X-ray diffuse scattering from single crystals quenched from T/Tc ≃ 1.03 and 1.2 (T c: transition temperature between long range...
STUDY OF SHORT RANGE ORDER IN Au3 Cu BY EXAFS (1986)
Bessiere, M., Dartyge, E., Lefebvre, S.
The purpose of this study is to determine if EXAFS is a suitable method to investigate the short range order (SRO) in concentrated solid solutions. Two s.r.o. Au3Cu samples annealed at T/TC=1.02 and...
Study of local order in Au75Cu25 and Au70Cu 30. Results of diffuse scattering measurements (1986)
Bessière, M., Calvayrac, Y., Lefebvre, S., Gratias, D., Cénédèse, P.
Local order in Au75Cu25 and Au70Cu 30 has been investigated by X-ray diffuse scattering from single crystals quenched from T/Tc ≃ 1.03 and 1.2 (T c: transition temperature between long range...
STUDY OF SHORT RANGE ORDER IN Au3 Cu BY EXAFS (1986)
Bessiere, M., Dartyge, E., Lefebvre, S.
The purpose of this study is to determine if EXAFS is a suitable method to investigate the short range order (SRO) in concentrated solid solutions. Two s.r.o. Au3Cu samples annealed at T/TC=1.02 and...
A NEUTRON DIFFRACTION DETERMINATION OF SHORT RANGE ORDER IN A Ni63.7Zr36.3 GLASS (1985)
Bellissent, R., Bigot, J., Calvayrac, Y., Lefebvre, S., Quivy, A.
A precise determination of the three partial structure factors for the eutectic composition Ni63.7Zr36.3 has been carried out using neutron diffraction on three isotopically substituted glasses. The...
A NEUTRON DIFFRACTION DETERMINATION OF SHORT RANGE ORDER IN A Ni63.7Zr36.3 GLASS (1985)
Bellissent, R., Bigot, J., Calvayrac, Y., Lefebvre, S., Quivy, A.
A precise determination of the three partial structure factors for the eutectic composition Ni63.7Zr36.3 has been carried out using neutron diffraction on three isotopically substituted glasses. The...
A NEUTRON DIFFRACTION DETERMINATION OF SHORT RANGE ORDER IN A Ni63.7Zr36.3 GLASS (1985)
Bellissent, R., Bigot, J., Calvayrac, Y., Lefebvre, S., Quivy, A.
A precise determination of the three partial structure factors for the eutectic composition Ni63.7Zr36.3 has been carried out using neutron diffraction on three isotopically substituted glasses. The...
Bureau, J F, Montagutelli, X, Lefebvre, S, Guénet, J L, Pla, M, Brahic, M
Theiler's murine encephalomyelitis virus is responsible for a chronic inflammatory demyelinating disease of the central nervous system of the mouse. The disease is associated with persistent viral...
Bürglen, L, Amiel, J, Viollet, L, Lefebvre, S, Burlet, P, Clermont, O, ...
The survival motor neuron (SMN) gene was lacking in 6/12 patients with arthrogryposis multiplex congenita (AMC) associated with spinal muscular atrophy (SMA). Neither point mutation in the SMN gene...
Bureau, J F, Montagutelli, X, Lefebvre, S, Guénet, J L, Pla, M, Brahic, M
Theiler's murine encephalomyelitis virus is responsible for a chronic inflammatory demyelinating disease of the central nervous system of the mouse. The disease is associated with persistent viral...
Bürglen, L, Amiel, J, Viollet, L, Lefebvre, S, Burlet, P, Clermont, O, ...
The survival motor neuron (SMN) gene was lacking in 6/12 patients with arthrogryposis multiplex congenita (AMC) associated with spinal muscular atrophy (SMA). Neither point mutation in the SMN gene...
Bürglen, L, Seroz, T, Miniou, P, Lefebvre, S, Burlet, P, Munnich, A, ...
Mutations of the survival motor neurone gene (SMN) are associated with spinal muscular atrophy (SMA), a frequent lethal autosomal recessive disorder. In spite of this, no phenotype-genotype...
Large scale deletions of the 5q13 region are specific to Werdnig-Hoffmann disease.
Burlet, P, Bürglen, L, Clermont, O, Lefebvre, S, Viollet, L, Munnich, A, ...
Spinal muscular atrophy (SMA) is characterised by degeneration of anterior horn cells of the spinal cord and represents the second most common, lethal, autosomal recessive disorder after cystic...