| 1. |
- Abazov, V. M., et al.
(författare)
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Determination of the strong coupling constant from the inclusive jet cross section in pp collisions at s=1.96 TeV
- 2009
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Ingår i: PHYS REV D. - 1550-7998 .- 1550-2368. ; 80, s. 111107-
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Tidskriftsartikel (refereegranskat)abstract
- We determine the strong coupling constant alpha(s) and its energy dependence from the p(T) dependence of the inclusive jet cross section in pp collisions at s=1.96 TeV. The strong coupling constant is determined over the transverse momentum range 50 < p(T)< 145 GeV. Using perturbative QCD calculations to order O(alpha(3)(s)) combined with O(alpha(4)(s)) contributions from threshold corrections, we obtain alpha(s)(M-Z)=0.1161(-0.0048)(+0.0041). This is the most precise result obtained at a hadron-hadron collider.
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| 2. |
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| 3. |
- Ortega Ferrusola, C., et al.
(författare)
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Effect of Cryopreservation on Nitric Oxide Production by Stallion Spermatozoa
- 2009
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Ingår i: Biology of Reproduction. - : Society for the Study of Reproduction. - 0006-3363 .- 1529-7268. ; 81:6, s. 1106-1111
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Tidskriftsartikel (refereegranskat)abstract
- The ability of stallion spermatozoa to produce nitric oxide (NO) before (fresh) and after freezing and thawing (FT) was evaluated by means of flow cytometry after loading the sperm suspension with the probe, 4,5-diaminofluorescenin diacetate. The presence of NO synthase (NOS) was investigated by Western blotting using anti-NOS1, anti-NOS3, or anti-universal NOS antibodies (Abs). While NO was detected both in fresh and FT sperm suspensions, its production increased after cryopreservation only when egg yolk was removed from the extender. Anti-NOS1 Ab intensively labeled a single band with an apparent molecular mass of approximately 83 kDa. On the other hand, the Ab developed against the NOS3 showed a band of approximately 96 kDa in fresh and FT sperm lysates. NO production was positively correlated with sperm motility and velocity after thaw, suggesting an NO role for the functionality of cryopreserved stallion spermatozoa; but the production of NO is compromised in egg yolk-containing extenders.
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| 4. |
- Ortega Ferrusola, C., et al.
(författare)
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Lipid peroxidation, assessed with BODIPY-C-11, increases after cryopreservation of stallion spermatozoa, is stallion-dependent and is related to apoptotic-like changes
- 2009
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Ingår i: Reproduction. - : BioScientifica. - 1470-1626 .- 1476-3990. ; 138:1, s. 55-63
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Tidskriftsartikel (refereegranskat)abstract
- Lipid peroxidation (LPO) of stallion spermatozoa was assessed in fresh semen and in samples of the same ejaculates after freezing and thawing. Particular attention was paid to individual differences in the susceptibility to LPO and its possible relationship with freezability. Innate levels of LPO were very low in fresh spermatozoa but increased after thawing, a change that was largely stallion-dependent. The level of LPO in fresh spermatozoa was not correlated with that of the thawed spermatozoa. Negative correlations existed between LPO and intact membranes post-thaw (r= -0.789, Pless than0.001), and also between LPO and spermatozoa with high mitochondrial membrane potential (Delta psi m) post-thaw (r= -0.689, Pless than0.001). LPO was also highly and significantly correlated with caspase activity. The correlation between caspase activity in ethidium positive cells and LPO was r=0.772, Pless than0.001. This LPO is unlikely to represent, per se, a sign of cryopreservation-induced injury, but it is apparently capable of triggering apoptotic-like changes that could result in the sub-lethal cryodamage often seen among surviving spermatozoa. Reproduction (2009) 138 55-63
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| 7. |
- Cortes-Perez, O., et al.
(författare)
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Bragg difraction of optical guided waves by spin-dipole waves in double layer ferromagnetic wave guides
- 2008
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Ingår i: Revista mexicana de física. - 0035-001X. ; 54:5, s. 376-381
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Tidskriftsartikel (refereegranskat)abstract
- The peculiarities of the Bragg diffraction of optical guided waves (OGWs) by spin-dipole waves (SDWs) in a new ferrite heterostructure, based on Bi3Fe5O12(BIG) thin film deposited on a standard YIG/GGG (a Yttrium Iron Garnet thin film over a Galium Gadolinum Garnet substrate) sample, is presented. It is shown that the efficiency of waveguide magnetooptic interaction between OGWs and SDWs in BIG/YIG/GGG can be 4-14 times larger than in the standard YIG/GGG waveguide, even in the case when the interacting waves are localized in YIG waveguide layer.
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| 8. |
- Cortés-Pérez, O., et al.
(författare)
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Difracción de Bragg de ondas ópticas guiadas por ondas de dipolo de spin en guías de onda ferromagnéticas de doble capa
- 2008
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Ingår i: Revista Mexicana de Fisica. - 0035-001X. ; 54:5, s. 376-381
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Tidskriftsartikel (refereegranskat)abstract
- The peculiarities of the Bragg diffraction of optical guided waves (OGWs) by spin-dipole waves (SDWs) in a new ferrite heterostructure, based on Bi3Fe5O12(BIG) thin film deposited on a standard YIG/GGG (a Yttrium Iron Garnet thin film over a Galium Gadolinum Garnet substrate) sample, is presented. It is shown that the efficiency of waveguide magnetooptic interaction between OGWs and SDWs in BIG/YIG/GGG can be 4-14 times larger than in the standard YIG/GGG waveguide, even in the case when the interacting waves are localized in YIG waveguide layer.
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| 9. |
- Garcia-Salicetti, S., et al.
(författare)
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Biosecure reference systems for on-line signature verification : A study of complementarity
- 2007
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Ingår i: Annales des télécommunications. - : Springer. - 0003-4347 .- 1958-9395. ; 62:1-2, s. 36-61
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Tidskriftsartikel (refereegranskat)abstract
- In this paper, we present an integrated research study in On-line Signature Verification undertaken by several teams that participate in the BioSecure Network of Excellence. This integrated work, started during the First BioSecure Residential Workshop, has as main objective the development of an On-line Signature Verification evaluation platform. As a first step, four On-line Signature Verification Systems based on different approaches are evaluated and compared following the same experimental protocol on MCYT signature database, which is the largest existing on-line western signature database publicly available with 16 500 signatures from 330 clients. A particular focus of work documented in this paper is multi-algorithmic fusion in order to study the complementarity of the approaches involved. To this end, a simple fusion method based on the Mean Rule is used after a normalization phase.
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| 10. |
- Garcia-Salicetti, S., et al.
(författare)
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Online Handwritten Signature Verification
- 2009
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Ingår i: Guide to Biometric Reference Systems and Performance Evaluation. - London : Springer London. - 9781848002913 ; , s. 125-165
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Bokkapitel (övrigt vetenskapligt/konstnärligt)abstract
- In this chapter, we first provide an overview of the existing main approaches, databases, evaluation campaigns and the remaining challenges in online handwritten signature verification. We then propose a new benchmarking framework for online signature verification by introducing the concepts of “Reference Systems”, “Reference Databases” and associated “Reference Protocols.” Finally, we present the results of several approaches within the proposed evaluation framework. Among them are also present the best approaches within the first international Signature Verification Competition held in 2004 (SVC’2004), Dynamic Time Warping and Hidden Markov Models. All these systems are evaluated first within the benchmarking framework and also with other relevant protocols. Experiments are also reported on two different databases (BIOMET and MCYT) showing the impact of time variability for online signature verification. The two reference systems presented in this chapter are also used and evaluated in the BMEC’2007 evaluation campaign, presented in Chap11. ©Springer 2009
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