Search results for "Skewness"

showing 3 items of 43 documents

Peak capacity estimation in isocratic elution.

2008

Peak capacity (i.e. maximal number of resolved peaks that fit in a chromatographic window) is a theoretical concept with growing interest, but based on a situation rarely met in practice. Real chromatograms tend to have uneven distributions, with overlapped peaks and large gaps. The number of resolved compounds should, therefore, be known from estimations. Several equations have been reported for this purpose based on three perspectives, namely, the intuitive approach (peak capacity as the size of the retention time window measured in peak width units), which assumes peaks with the same width, and the outlines of Giddings and Grushka, which consider changes in peak width with retention time…

Work (thermodynamics)Isocratic elutionChromatographyAcetonitrilesChemistryOrganic ChemistryMean valueAdrenergic beta-AntagonistsChromatography liquidSodium Dodecyl SulfateGeneral MedicineModels TheoreticalBiochemistryAnalytical ChemistrySkewnessPhase compositionDiureticsRetention timeMicellesChromatography LiquidJournal of chromatography. A
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Uncertainties on the determination of the strong coupling αs from the energy evolution of jet fragmentation functions at low z

2014

The QCD coupling alpha_s is determined at NLO*+NMLLA accuracy from the comparison of experimental jet data to theoretical predictions of the energy-evolution of the parton-to-hadron fragmentation function moments (multiplicity, peak, width, skewness) at low fractional hadron momentum z. From the existing e+e- and e-p jet data, we obtain alpha_s(m_Z^2) = 0.1195 +/- 0.0021 (exp.) {+0.0015}_{-0.0} (scale) at the Z mass. The uncertainties of the extracted alpha_s value are discussed.

jetsNuclear and High Energy PhysicsParticle physicsElectron–positron annihilationHadronFOS: Physical sciencespQCD01 natural sciencesHigh Energy Physics - ExperimentNuclear physicsHigh Energy Physics - Experiment (hep-ex)High Energy Physics - Phenomenology (hep-ph)Fragmentation (mass spectrometry)strong coupling0103 physical sciencesMultiplicity (chemistry)010306 general physicsNuclear ExperimentParticle Physics - PhenomenologyPhysicsQuantum chromodynamicsta114deep-inelastic scattering010308 nuclear & particles physicsparton fragmentation functionsHigh Energy Physics::Phenomenologye+e− annihilationDeep inelastic scatteringHigh Energy Physics - PhenomenologySkewnessStrong couplingHigh Energy Physics::ExperimentNuclear and Particle Physics Proceedings
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THE INFLUENCE OF TEACHER-STUDENT COMMUNICATION ON THE IMPORTANCE OF PHYSICAL EDUCATION

2021

During adolescence, there is a significant risk of sports abandonment associated with sedentarism and overweight. For this reason, Physical Education (PE) classes should be an opportunity to bring physical activity and sport closer to schoolchildren developing, and consolidating healthy lifestyle habits. Considering the importance that teaching communication procedures can have in the motivation of students, and given the lack of specific studies that investigate the influence of these processes on the motivation to practice sport in the context of PE, the aim of this study is to determine the effect of the teacher's communicational dimensions (challenging, encouragement and praise, non-ver…

media_common.quotation_subjectComunicacióProfessorsMestresSample (statistics)Context (language use)030229 sport sciencesOverweightDevelopmental psychologyPhysical educationCorrelation03 medical and health sciences0302 clinical medicineSkewnessPerceptionmedicineOrthopedics and Sports MedicineEducació física030212 general & internal medicinePraisemedicine.symptomPsychologymedia_common
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