4,374 research outputs found
Measurement of the inclusive semileptonic b branching ratios and the extraction of at LEP
No full textThe inclusive direct b to l/sup -/ and cascade b to c to l/sup +/ semileptonic branching ratios of the b quark were measured by the four LEP collaborations by means of several strategies. The first inclusive measurement of BR(b to c to l/sup -/) was obtained by DELPHI. From the BR(b to l/sup -/) LEP average, the most precise determination of the V/sub cb/ coupling constant was then extracted in the OPE approach. (7 refs)
Natalizumab safety in paediatric-onset multiple sclerosis at the time of SARS-Cov-2 pandemic
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Very late-onset recurrent myelitis in a patient diagnosed with antiphospholipid syndrome: A puzzle of autoimmunity
No full textWe describe the case of a man with a very-late onset neuromyelitis optica spectrum disorder syndrome (NMOSD) who was initially diagnosed as recurrent antiphospholipid syndrome-associated myelitis. This case illustrates that a puzzle of autoreactive antibodies can be detected in patients having neurological syndromes belonging to the NMOSD. Prompt identification and timely immunosuppression prevent relapses and the accumulation of irreversible disability
Ophthalmoplegic migraine: Could electroencephalogram still be a useful tool to better understand the pathogenetic mechanism?
No full textA patient studied with EEG during an ophthalmoplegic migraine (OM) attack is reported. The EEG findings in our patient with OM seem to indicate a pattern resembling migraine with aura or
complicated migraine attacks. We believe that EEG could still be useful in OM patients to clarify a central OM pathogenetic hypothesis, and to identify a possible subgroup of primary O
New DELPHI Results from Semileptonic b, c Decays
No full textThe inclusive direct and cascade semileptonic branching ratios of the b quark were measured from a fit to the lepton momentum spectrum in the B-hadron rest frame, exploiting the charge correlation between the lepton and the heavy meson. The value of the Vcb element in the CKM quark mixing matrix was computed from the differential decay width of the process B0--> D+-* l- nu, measured as a function of the product W of the B and D* 4-velocities, using an inclusive method of D* reconstruction. A measurement of the ratio Vub/Vcb has been obtained by using the reconstructed secondary hadronic mass in semileptonic decays of B hadrons. The charm semileptonic branching ratio was measured using a double tag method based on the detection of exclusively reconstructed D mesons accompanied by a lepton in the opposite hemisphere
Monitoring Progressive Multiple Sclerosis with Novel Imaging Techniques.
No full textImaging markers for monitoring disease progression in progressive multiple sclerosis (PMS) are scarce, thereby limiting the possibility to monitor disease evolution and to test effective treatments in clinical trials. Advanced imaging techniques that have the advantage of metrics with increased sensitivity to short-term tissue changes and increased specificity to the structural abnormalities characteristic of PMS have recently been applied in clinical trials of PMS. In this review, we (1) provide an overview of the pathological features of PMS, (2) summarize the findings of research and clinical trials conducted in PMS which have applied conventional and advanced magnetic resonance imaging techniques and (3) discuss recent advancements and future perspectives in monitoring PMS with imaging techniques
Eccezioni e limitazioni al diritto d'autore in Internet = Exceptions and Limitations to Copyright Law in the Internet
No full textNel diritto d'autore – e non solo – Internet rappresenta il passo forse definitivo verso la completa emancipazione del corpus misticum da quello mecanicum. Con l'avvento della tecnologia digitale, abbiamo potuto osservare un profondo mutamento nella creazione, trasmissione, e utilizzo dell'informazione e della creatività, comparabile per portata all'invenzione della stampa a caratteri mobili. Le ripercussioni che questo mutato scenario proietta sull'utilizzo delle opere della creatività e, per quanto qui rileva, sul particolare caso delle libere utilizzazioni, o eccezioni e limitazioni al diritto d'autore, sono ovviamente di notevole impatto e rappresentano l'oggetto del presente articolo. Questo paper © Copyright 2011 di Thomas Margoni è pubblicato con Licenza Creative Commons Attribuzione – Condividi allo stesso modo 3.0 Italia. Testo completo della licenza: http://creativecommons.org/licenses/by-sa/3.0/it/legalcode
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