47 research outputs found
Fuzzy Mass Relations in the Standard Model
Recently Connes has proposed a new geometric version of the standard model
including a non-commutative charge conjugation. We present a systematic
analysis of the relations among masses and coupling constants in this approach.
In particular, for a given top mass, the Higgs mass is constrained to lie in an
interval. Therefore this constraint is locally stable under renormalization
flow.Comment: 14 pages LaTeX, one figure postscrip
Fuzzy Mass Relations for the Higgs
The non-commutative approach of the standard model produces a relation
between the top and the Higgs masses. We show that, for a given top mass, the
Higgs mass is constrained to lie in an interval. The length of this interval is
of the order of .Comment: 26 pages, LaTe
The brain signature of paracetamol in healthy volunteers: a double-blind randomized trial
International audienceBackground: Paracetamol’s (APAP) mechanism of action suggests the implication of supraspinal structures but no neuroimaging study has been performed in humans.Methods and results: This randomized, double-blind, crossover, placebo-controlled trial in 17 healthy volunteers (NCT01562704) aimed to evaluate how APAP modulates pain-evoked functional magnetic resonance imaging signals. We used behavioral measures and functional magnetic resonance imaging to investigate the response to experimental thermal stimuli with APAP or placebo administration. Region-of-interest analysis revealed that activity in response to noxious stimulation diminished with APAP compared to placebo in prefrontal cortices, insula, thalami, anterior cingulate cortex, and periaqueductal gray matter.Conclusion: These findings suggest an inhibitory effect of APAP on spinothalamic tracts leading to a decreased activation of higher structures, and a top-down influence on descending inhibition. Further binding and connectivity studies are needed to evaluate how APAP modulates pain, especially in the context of repeated administration to patients with pain
Spintronics: Fundamentals and applications
Spintronics, or spin electronics, involves the study of active control and
manipulation of spin degrees of freedom in solid-state systems. This article
reviews the current status of this subject, including both recent advances and
well-established results. The primary focus is on the basic physical principles
underlying the generation of carrier spin polarization, spin dynamics, and
spin-polarized transport in semiconductors and metals. Spin transport differs
from charge transport in that spin is a nonconserved quantity in solids due to
spin-orbit and hyperfine coupling. The authors discuss in detail spin
decoherence mechanisms in metals and semiconductors. Various theories of spin
injection and spin-polarized transport are applied to hybrid structures
relevant to spin-based devices and fundamental studies of materials properties.
Experimental work is reviewed with the emphasis on projected applications, in
which external electric and magnetic fields and illumination by light will be
used to control spin and charge dynamics to create new functionalities not
feasible or ineffective with conventional electronics.Comment: invited review, 36 figures, 900+ references; minor stylistic changes
from the published versio
Radiofréquence bipolaire et cimentoplastie combinées dans le traitement des métastases osseuses (résultats préliminaires chez 11 patients)
BESANCON-BU Médecine pharmacie (250562102) / SudocPARIS-BIUM (751062103) / SudocSudocFranceF
Infiltration scano-guidée en deux sites dans la névralgie pudendale (étude rétrospective chez 49 patients)
BESANCON-BU Médecine pharmacie (250562102) / SudocPARIS-BIUM (751062103) / SudocSudocFranceF
Neurolyse du ganglion stellaire par radiofréquence sous guidage scanographique dans le syndrome douloureux régional complexe du membre supérieur (étude chez 28 patients)
BESANCON-BU Médecine pharmacie (250562102) / SudocPARIS-BIUM (751062103) / SudocSudocFranceF
Résultats comparatifs de l'imagerie par résonance magnétique nucléaire du corps entier et de la tomodensitométrie du corps entier dans l'évaluation de patients porteurs d'un mélanome malin en stade III et IV selon la classification AJCC (American Joint Committee on Cancer)
BESANCON-BU Médecine pharmacie (250562102) / SudocSudocFranceF