372 research outputs found
Calibration of surface roughness standards
No full textThe key comparison EURAMET.L-K8.2013 on roughness was carried out in the framework of a EURAMET project starting in 2013 and ending in 2015. It involved the participation of 17 National Metrology Institutes from Europe, Asia, South America and Africa representing four regional metrology organisations. Five surface texture standards of different type were circulated and on each of the standards several roughness parameters according to the standard ISO 4287 had to be determined. 32 out of 395 individual results were not consistent with the reference value. After some corrective actions the number of inconsistent results could be reduced to 20, which correspond to about 5% of the total and can statistically be expected. In addition to the material standards, two softgauges were circulated, which allow to test the software of the instruments used in the comparison. The comparison results help to support the calibraton and measurement capabilities (CMCs) of the laboratories involved in the CIPM MRA. Main text To reach the main text of this paper, click on Final Report. Note that this text is that which appears in Appendix B of the BIPM key comparison database kcdb.bipm.org/. The final report has been peer-reviewed and approved for publication by the CCL, according to the provisions of the CIPM Mutual Recognition Arrangement (CIPM MRA)
Another view of gender stereotypes in traditional fairy tales: when men are the ones who sleep: "The sleeping prince"
No full textReferencias bibliográficas:
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• Torres Begines, C. & Palomo Montiel, E. (2016). De objeto de salvación a heroínas de su propia historia. La evolución de las princesas en la literatura infantil actual. Didáctica: Lengua y Literatura, 28, 285-306. https://doi.org/10.5209/DIDA.54082
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• Vallvey, Á. (2018). Cuentos clásicos feministas. Arzalia Ediciones.En los últimos tiempos, se ha acusado a los cuentos tradicionales de sexistas y, por ello, se ha desaconsejado su lectura. En este trabajo se revisará parte de la crítica feminista, psicoanalítica y social para, a continuación, analizar de manera comparativa diversas versiones de cuentos protagonizados por durmientes masculinos y femeninos. En concreto, se partirá del análisis de la versión de "El príncipe durmiente" recogida por Rodríguez Almodóvar (1983, 2015) y, a continuación, se establecerá el análisis comparativo con otros durmientes masculinos de la tradición, como Endimión o Cupido. Asimismo, se comparará con las versiones más difundidas de "La Bella durmiente" (Perrault y Grimm). La comparación de todas estas versiones, que tendrá en cuenta el reparto de las funciones que señala Propp, nos permitirá llegar a la conclusión de que, independientemente de los personajes que cumplan la función en cada una de las versiones, el significado es el mismo: el despertar a la edad adulta, si aceptamos las interpretaciones psicoanalíticas. Igualmente, el papel de heroína buscadora de la princesa protagonista de "El príncipe durmiente" revelará que existen muchos cuentos tradicionales en los que sí predominan las mujeres activas, fuertes, rebeldes y salvadoras.In recent times, traditional tales have been accused of being sexist and, therefore, their reading has not been advised. In this work, part of the feminist, psychoanalytic and social criticism will be reviewed in order to subsequently analyze in a comparative manner various stories starring male and female sleepers. Specifically, the analysis will start from the version of “The sleeping prince” collected by Rodríguez Almodóvar (1983, 2015). Then, a comparative analysis with other male sleepers of the tradition, such as Endimión or Cupid, will be carried out. Likewise, “The Sleeping Prince” will be compared to the most widespread versions of “Sleeping Beauty” (Perrault and Grimm). The analysis will take into account the distribution of the functions that Propp points out; it will enable us to conclude that the meaning is the same, regardless of the characters that fulfill the function in each of the versions: awakening to adulthood, if we accept psychoanalytic interpretations. Also, the role of a heroine seeker of the princess protagonist of “The sleeping prince” will reveal that there are many traditional tales in which active, strong, rebellious, and savior women do predominate.Depto. de Didáctica de las Lenguas, Artes y Educación FísicaFac. de EducaciónTRUEpu
Test of Lepton Flavor Universality with B+ →k+π+π-l+l- Decays
No full textThe first test of lepton flavor universality between muons and electrons using B+→K+π+π-l+l- (l=e, μ) decays is presented. The measurement is performed with data from proton-proton collisions collected by the LHCb experiment at center-of-mass energies of 7, 8, and 13 TeV, corresponding to an integrated luminosity of 9 fb-1. The ratio of branching fractions between B+→K+π+π-e+e- and B+→K+π+π-μ+μ- decays is measured in the dilepton invariant-mass-squared range 1.1<7.0 GeV2/c4 and is found to be RKππ-1=1.31-0.17+0.18(stat) -0.09+0.12(syst), in agreement with the standard model prediction. The first observation of the B+→K+π+π-e+e- decay is also reported
Test of Lepton Flavor Universality with B+→K+π+π−l+l− Decays
No full textThe first test of lepton flavor universality between muons and electrons using Bþ → Kþπþπ−lþl−
(l 1⁄4 e, μ) decays is presented. The measurement is performed with data from proton-proton collisions
collected by the LHCb experiment at center-of-mass energies of 7, 8, and 13 TeV, corresponding to an
integrated luminosity of 9 fb−1. The ratio of branching fractions between Bþ → Kþπþπ−eþe−
and Bþ → Kþπþπ−μþμ− decays is measured in the dilepton invariant-mass-squared range
1.1 < q2 < 7.0 GeV2=c4 and is found to be R−1
Kππ 1⁄4 1.31þ0.18 −0.17 ðstatÞ þ0.12 −0.09 ðsystÞ, in agreement with the
standard model prediction. The first observation of the Bþ → Kþπþπ−eþe− decay is also reporte
Measurement of the branching fraction ratio RK at large dilepton invariant mass
No full textA test of lepton universality between muons and electrons is performed using B+ → K+l+l− decays (where l = e, μ), in the dilepton invariant-mass-squared region above 14.3 GeV2/c4. The data used for the measurement consists of beauty meson decays produced in proton-proton collisions, corresponding to an integrated luminosity of 9 fb−1, collected by the LHCb experiment between 2011 and 2018. The ratio of branching fractions for B+→ K+μ+μ− and B+→ K+e+e− decays is measured to be RK=1.08−0.09+0.11stat−0.04+0.04syst, which is consistent with the Standard Model prediction of unity. This constitutes the most precise test of lepton flavour universality using B+ → K+l+l− decays with dilepton invariant-mass-squared above the ψ(2S) mass, whilst being the first of its kind at a hadron collider
Search for decays at LHCb
No full textInternational audienceA search for decays is performed using proton-proton collision data collected by the LHCb experiment at a centre-of-mass energy of , corresponding to an integrated luminosity of . No signals are found and upper limits are set for the first time on the branching fractions and , at the 90% confidence level
Measurement of CP Violation in B0 →ψ (→l+l-) KS0 (→π+π-) Decays
No full textA measurement of time-dependent CP violation in the decays of B0 and B ̄0 mesons to the final states J/ψ(→μ+μ-)KS0, ψ(2S)(→μ+μ-)KS0 and J/ψ(→e+e-)KS0 with KS0→π+π- is presented. The data correspond to an integrated luminosity of 6 fb-1 collected at a center-of-mass energy of s=13 TeV with the LHCb detector. The CP-violation parameters are measured to be SψKS0=0.717±0.013(stat)±0.008(syst) and CψKS0=0.008±0.012(stat)±0.003(syst). This measurement of SψKS0 represents the most precise single measurement of the CKM angle β to date and is more precise than the current world average. In addition, measurements of the CP-violation parameters of the individual channels are reported and a combination with the LHCb Run 1 measurements is performed
Measurements of the branching fraction ratio B(φ→μ+μ−)/B(φ→e+e−) with charm meson decays
No full textMeasurements of the branching fraction ratio B(φ→μ+μ−)/B(φ→e+e−) with Ds+→π+φ and D+→ π+φ decays, denoted Rφπs and Rφπd, are presented. The analysis is performed using a dataset corresponding to an integrated luminosity of 5.4 fb−1 of pp collision data collected with the LHCb experiment. The branching fractions are normalised with respect to the B+ → K+J/ψ(→ e+e−) and B+ → K+J/ψ(→ μ+μ−) decay modes. The combination of the results yields (Formula presented.) The result is compatible with previous measurements of the φ → l+l− branching fractions and predictions based on the Standard Model
Test of Lepton Flavor Universality with Bs0 →φl+l- Decays
No full textLepton flavor universality in rare b→s transitions is tested for the first time using Bs0 meson decays. The measurements are performed using pp collision data collected by the LHCb experiment between 2011 and 2018, corresponding to a total integrated luminosity of 9 fb-1. Branching fraction ratios between the Bs0→φe+e- and Bs0→φμ+μ- decays are measured in three regions of dilepton mass squared, q2, with 0.1<1.1, 1.1<6.0, and 15<19 GeV2/c4. The results agree with the standard model expectation of lepton flavor universality
Angular analysis of B0→ K*0e+e− decays
No full textAn angular analysis of B0→ K*0e+e− decays is presented using proton-proton collision data collected by the LHCb experiment at centre-of-mass energies of 7, 8 and 13 TeV, corresponding to an integrated luminosity of 9 fb−1. The analysis is performed in the region of the dilepton invariant mass squared of 1.1–6.0 GeV2/c4. In addition, a test of lepton flavour universality is performed by comparing the obtained angular observables with those measured in B0→ K*0μ+μ− decays. In general, the angular observables are found to be consistent with the Standard Model expectations as well as with global analyses of other b → sl+l− processes, where l is either a muon or an electron. No sign of lepton-flavour-violating effects is observed
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