Search results for "Maxim"

Cardiorespiratory Fitness and the Risk of Serious Ventricular Arrhythmias: A Prospective Cohort Study.

2019

Cardiorespiratory fitness (CRF) is an established risk factor for cardiovascular disease outcomes. However, the relationship of CRF with risk of ventricular arrhythmias (VAs) is unknown. We aimed to assess the prospective association of CRF with the risk of serious VAs. Cardiorespiratory fitness, as measured by maximal oxygen uptake, was assessed using a respiratory gas exchange analyzer in 2299 middle-aged men in the Kuopio Ischemic Heart Disease prospective cohort. We corrected for within-person variability in CRF levels using data from repeated measurements 11 years apart. During median follow-up of 25.3 years (interquartile range, 18.7-27.2 years), 73 serious VAs were recorded. The age-…

Singular (p, q)-equations with superlinear reaction and concave boundary condition

2020

We consider a parametric nonlinear elliptic problem driven by the sum of a p-Laplacian and of a q-Laplacian (a (Formula presented.) -equation) with a singular and (Formula presented.) -superlinear reaction and a Robin boundary condition with (Formula presented.) -sublinear boundary term (Formula presented.). So, the problem has the combined effects of singular, concave and convex terms. We look for positive solutions and prove a bifurcation-type theorem describing the changes in the set of positive solutions as the parameter varies.

Attieksme pret sociālo mārketingu kā komunikācijas rīku: uzņēmumu “Rimi” un “Maxima” piemēru analīze

2021

Bakalaura darba tēma ir “Attieksme pret sociālo mārketingu kā komunikācijas rīku: uzņēmumu “Rimi” un “Maxima” piemēru analīze”. Mērķis ir noskaidrot iedzīvotāju attieksmi pret sociālajām kampaņām “Labestības diena” un “Starp cilvēku un labu darbu ir viena poga”. Īpaša uzmanība tiek pievērsta faktoriem, kas mudina indivīdus piedalīties sociālajās kampaņās un veikt ziedojumu. Teorētiskā daļa skaidro sociālā mārketinga būtību, kā arī tiek aprakstīti mārketinga rīki, motivācijas mehānismi un sociālās apmaiņas teorija. Empīriskajā daļā kvalitatīvā kontentanalīze ļauj izprast kampaņu vēstījumu. Taču aptaujas un fokusgrupu diskusiju gaitā tika noskaidrota Latvijas iedzīvotāju attieksme pret sociāl…

Spatial spillovers in France: a study on individual count data at the city level

2007

Our study aims to measure the effects of spatial R&D spillovers on firms' patent production at the city level. We use an original method to estimate the spatial dimension of spillovers using count data. The method, based on a generalized cross entropy approach, allows us to test spatial auto-correlation. The main result is that when there are local spillovers, their impact on knowledge production is different according to the geographical area and the sector.

SNP and SML estimation of univariate and bivariate binary–choice models

2008

We discuss the semi-nonparametric approach of Gallant and Nychka (1987, Econometrica 55: 363–390), the semiparametric maximum likelihood approach of Klein and Spady (1993, Econometrica 61: 387–421), and a set of new Stata commands for semiparametric estimation of three binary-choice models. The first is a univariate model, while the second and the third are bivariate models without and with sample selection, respectively. The proposed estimators are root-n consistent and asymptotically normal for the model parameters of interest under weak assumptions on the distribution of the underlying error terms. Our Monte Carlo simulations suggest that the efficiency losses of the semi-nonparametric a…

The Radó–Kneser–Choquet theorem for $p$-harmonic mappings between Riemannian surfaces

2020

In the planar setting the Rad\'o-Kneser-Choquet theorem states that a harmonic map from the unit disk onto a Jordan domain bounded by a convex curve is a diffeomorphism provided that the boundary mapping is a homeomorphism. We prove the injectivity criterion of Rad\'o-Kneser-Choquet for $p$-harmonic mappings between Riemannian surfaces. In our proof of the injecticity criterion we approximate the $p$-harmonic map with auxiliary mappings that solve uniformly elliptic systems. We prove that each auxiliary mapping has a positive Jacobian by a homotopy argument. We keep the maps injective all the way through the homotopy with the help of the minimum principle for a certain subharmonic expressio…

Performance-related physiological changes induced by one year of endurance training in young athletes

2023

IntroductionAlthough maximal oxygen uptake (VO2max) is generally recognized as the single best indicator of aerobic fitness in youth, interpretation of this parameter and the extent to which it can be improved by training remain controversial, as does the relative importance of VO2max for performance in comparison to other factors such as power production. Here, we examined the influence of endurance training on the VO2max, muscle power and sports-related performance of cross-country skiers attending a school specializing in sports, as well as potential relationships between any changes observed to one another and/or to perceived stress scale (Cohen) and certain blood parameters.MethodsOn t…

Physical performance of Finnish futsal players, analysis of game intensity and fatigue in official futsal games

2017

Introduction. Futsal has grown notably in last years and have over 12 million players worldwide. Futsal is a high-intensity indoor sport where burst of multi-planar movements varies with short periods of rest. Futsal is played on a court sized 40 x 20 m for two halves of 20 min, where clock is stopped when ball is out of play. Purpose of this study was to find out physical performance of Finnish futsal players and analyse intensity and fatigue in official futsal games. Methods. Two Finnish Futsal League teams were involved (n = 19), age 26.3 (± 3.0 years), body mass 76.4 (± 6.2 kg), height 178.7 (± 5.7 cm), BMI 23.9 (± 1.4 kg/m2) and body fat % 12.3 (± 4.0 %). Measurement were done in the m…

Rectifiability and singular integrals

1995

Weak Maximum Principle and Application to Swimming at Low Reynolds Number

2018

We refer to [9, 42, 46] for more details about the general concepts and notations introduced in this section.