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Search Results: 1 - 10 of 4275 matches for " Maude Schneider "
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Online Social Skills Group Training for Adolescents and Young Adults with 22q11.2 Deletion Syndrome (22q11.2DS)  [PDF]
Bronwyn Glaser, Stephan Eliez, Hannah Cholemkery, Christine M. Freitag, Maude Schneider
Journal of Behavioral and Brain Science (JBBS) , 2018, DOI: 10.4236/jbbs.2018.83008
Abstract: Somatic, cognitive and psychiatric obstacles contribute to social impairment in 22q11.2DS and prevent adequate responses during interactions. We adapted the autism-specific SOSTA-FRA program for use during online group sessions with geographically-isolated 22q11DS adolescents or adults. The 12 weekly sessions targeted communication, emotional awareness, and reciprocity. Twenty-two participants were evaluated on behaviour, social responsiveness, and cognition pre- and post-intervention. Parents completed a questionnaire to ascertain whether the intervention met their needs. Parents were satisfied with the format and curriculum contents and reported improved emotional awareness, well-being, and reciprocity post-intervention. Pre-post results suggest large effects on social awareness and small to medium effects on social motivation. Results indicate that online social skills training is feasible and effective for individuals with 22q11.2DS.
A consistent interpretation of the low temperature magneto-transport in graphite using the Slonczewski--Weiss--McClure 3D band structure calculations
J. M. Schneider,M. Orlita,M. Potemski,D. K. Maude
Physics , 2009, DOI: 10.1103/PhysRevLett.102.166403
Abstract: Magnetotransport of natural graphite and highly oriented pyrolytic graphite (HOPG) has been measured at mK temperatures. Quantum oscillations for both electron and hole carriers are observed with orbital angular momentum quantum number up to $N\approx90$. A remarkable agreement is obtained when comparing the data and the predictions of the Slonczewski--Weiss--McClure tight binding model for massive fermions. No evidence for Dirac fermions is observed in the transport data which is dominated by the crossing of the Landau bands at the Fermi level, corresponding to $dE/dk_z=0$, which occurs away from the $H$ point where Dirac fermions are expected.
Reply to comment (arXiv:0907.2026v2) on "Consistent Interpretation of the Low-Temperature Magnetotransport in Graphite Using the Slonczewski-Weiss-McClure 3D Band-Structure Calculations" (arXiv:0902.1925)
J. M. Schneider,M. Orlita,M. Potemski,D. K. Maude
Physics , 2010,
Abstract: Reply to comment (arXiv:0907.2026v2) on "Consistent Interpretation of the Low-Temperature Magnetotransport in Graphite Using the Slonczewski-Weiss-McClure 3D Band-Structure Calculations" (arXiv:0902.1925)
Graphite from the viewpoint of Landau level spectroscopy: An effective graphene bilayer and monolayer
M. Orlita,C. Faugeras,J. M. Schneider,G. Martinez,D. K. Maude,M. Potemski
Physics , 2009, DOI: 10.1103/PhysRevLett.102.166401
Abstract: We describe an infrared transmission study of a thin layer of bulk graphite in magnetic fields up to B = 34 T. Two series of absorption lines whose energy scales as sqrtB and B are present in the spectra and identified as contributions of massless holes at the H point and massive electrons in the vicinity of the K point, respectively. We find that the optical response of the K point electrons corresponds, over a wide range of energy and magnetic field, to a graphene bilayer with an effective inter-layer coupling 2\gamma_1, twice the value for a real graphene bilayer, which reflects the crystal ordering of bulk graphite along the c-axis. The K point electrons thus behave as massive Dirac fermions with a mass enhanced twice in comparison to a true graphene bilayer.
Using the de Haas-van Alphen effect to map out the closed three-dimensional Fermi surface of natural graphite
J. M. Schneider,B. A. Piot,I. Sheikin,D. K. Maude
Physics , 2011, DOI: 10.1103/PhysRevLett.108.117401
Abstract: The Fermi surface of graphite has been mapped out using de Haas van Alphen (dHvA) measurements at low temperature with in-situ rotation. For tilt angles $\theta>60^{\circ}$ between the magnetic field and the c-axis, the majority electron and hole dHvA periods no longer follow the $\cos(\theta)$ behavior demonstrating that graphite has a 3 dimensional closed Fermi surface. The Fermi surface of graphite is accurately described by highly elongated ellipsoids. A comparison with the calculated Fermi surface suggests that the SWM trigonal warping parameter $\gamma_3$ is significantly larger than previously thought.
Reduced Fronto-Temporal and Limbic Connectivity in the 22q11.2 Deletion Syndrome: Vulnerability Markers for Developing Schizophrenia?
Marie-Christine Ottet, Marie Schaer, Leila Cammoun, Maude Schneider, Martin Debbané, Jean-Philippe Thiran, Stephan Eliez
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0058429
Abstract: The 22q11.2 deletion syndrome (22q11DS) is a widely recognized genetic model allowing the study of neuroanatomical biomarkers that underlie the risk for developing schizophrenia. Recent advances in magnetic resonance image analyses enable the examination of structural connectivity integrity, scarcely used in the 22q11DS field. This framework potentially provides evidence for the disconnectivity hypothesis of schizophrenia in this high-risk population. In the present study, we quantify the whole brain white matter connections in 22q11DS using deterministic tractography. Diffusion Tensor Imaging was acquired in 30 affected patients and 30 age- and gender-matched healthy participants. The Human Connectome technique was applied to register white matter streamlines with cortical anatomy. The number of fibers (streamlines) was used as a measure of connectivity for comparison between groups at the global, lobar and regional level. All statistics were corrected for age and gender. Results showed a 10% reduction of the total number of fibers in patients compared to controls. After correcting for this global reduction, preserved connectivity was found within the right frontal and right parietal lobes. The relative increase in the number of fibers was located mainly in the right hemisphere. Conversely, an excessive reduction of connectivity was observed within and between limbic structures. Finally, a disproportionate reduction was shown at the level of fibers connecting the left fronto-temporal regions. We could therefore speculate that the observed disruption to fronto-temporal connectivity in individuals at risk of schizophrenia implies that fronto-temporal disconnectivity, frequently implicated in the pathogenesis of schizophrenia, could precede the onset of symptoms and, as such, constitutes a biomarker of the vulnerability to develop psychosis. On the contrary, connectivity alterations in the limbic lobe play a role in a wide range of psychiatric disorders and therefore seem to be less specific in defining schizophrenia.
Magneto-transmission as a probe of Dirac fermions in bulk graphite
M. Orlita,C. Faugeras,G. Martinez,D. K. Maude,M. L. Sadowski,J. M. Schneider,M. Potemski
Physics , 2008, DOI: 10.1088/0953-8984/20/45/454223
Abstract: Far infrared magneto-transmission spectroscopy has been used to probe "relativistic" fermions in highly oriented pyrolytic and natural graphite. Nearly identical transmission spectra of those two materials are obtained, giving the signature of Dirac fermions via absorption lines with an energy that scales as \sqrt{B}. The Fermi velocity is evaluated to be c*=1.02x10^6 m/s and the pseudogap at the H point is estimated to be below 10 meV.
La gestion de l’Avastin par le bioéthicien : transfert d’une responsabilité politique?
Laliberté, Maude
BioéthiqueOnline , 2012,
Abstract: Avastin is a paradigmatic example of a common situation in the health system: the introduction of promising but very expensive new drugs. This situation disrupts the delicate balance of the health system and causes problems for various stakeholders such as patients, health professionals, bioethicists and managers.
Le débat démocratique en neurosciences : possible et nécessaire
Laliberté, Maude
BioéthiqueOnline , 2012,
Abstract: The neurosciences, a dynamic field of biomedical research, are a paradigmatic example to illustrate the responsibilities of researchers and their interactions with society. This comment highlights the importance of public debate in neurosciences.
La protección del agua: diez principios
Maude Barlow
Polis : Revista de la Universidad Bolivariana , 2006,
Abstract: Es posible un decálogo del agua en la era de la globalización y la liberalización de todos los mercados y recursos naturales? Maude Barlow así lo cree y nos propone 10 principios básicos para mantener un equilibrio del agua entre las necesidades humanas y el mundo natural. El agua no puede concebirse simplemente como un recurso explotable, sino como un patrimonio del planeta y para las próximas generaciones. Los 10 principios de Barlow, más que un código, representan una invitación a pensar la sustentabilidad a partir de lo local.
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