Search results for "paradox"
showing 10 items of 164 documents
Impact of obesity on adverse in-hospital outcomes in patients undergoing percutaneous mitral valve edge-to-edge repair using MitraClip® procedure - R…
2019
Background and aim: The number of percutaneous edge-to-edge mitral regurgitation (MR) valve repairs with MitraClip® implantations increased exponentially in recent years. Studies have suggested an obesity survival paradox in patients with cardiovascular diseases. We investigated the influence of obesity on adverse in-hospital outcomes in patients with MitraClip® implantation. Methods and results: We analyzed data on characteristics of patients and in-hospital outcomes for all percutaneous mitral valve repairs using the edge-to-edge MitraClip®-technique in Germany 2011–2015 stratified for obesity vs. normal-weight/over-weight. The nationwide inpatient sample comprised 13,563 inpatients under…
Males influence maternal effects that promote sexual selection: a quantitative genetic experiment with dung beetles Onthophagus taurus
2003
J.S.K. was funded by the Academy of Finland, L.W.S. by the Australian Research Council, J.H. by an Australian Postgraduate Award, and J.L.T. by a postdoctoral research fellowship from the University of Western Australia. Recently, doubt has been cast on studies supporting good genes sexual selection by the suggestion that observed genetic benefits for offspring may be confounded by differential maternal allocation. In traditional analyses, observed genetic sire effects on offspring phenotype may result from females allocating more resources to the offspring of attractive males. However, maternal effects such as differential allocation may represent a mechanism promoting genetic sire effects…
Overweight, Obesity, and All-Cause Mortality
2013
Dr Flegal and colleagues1 concluded that grade 1 obesity was not associated with higher all-cause mortality and that overweight was associated with significantly lower all-cause mortality. Other studies have shown that obesity in different populations, such as elderly people and patients with cardiovascular diseases, is also paradoxically not associated with a higher but rather with a lower mortality risk.2 This has been termed the obesity paradox
Sex-specific differences in mortality and the obesity paradox of patients with myocardial infarction ages70 y.
2017
Abstract Objectives Recent studies suggest an obesity survival paradox in patients with acute myocardial infarction (MI). The aim of this study was to investigate the in-hospital mortality of patients aged ≥70 y with acute MI relative to sex and obesity. Methods We selected patients ≥70 y of age with a diagnosis of acute MI based on the International Classification of Diseases (ICD) code I21 in the nationwide database of the Federal Statistical Office of Germany in 2014. We stratified the patients for sex and obesity versus nonobesity, and obesity classes I, II, and III. We compared the in-hospital mortality of these groups. Results In 2014, 122 607 patients ≥70 y of age were diagnosed with…
The obesity paradox: Analysis from the SMAtteo COvid-19 REgistry (SMACORE) cohort
2020
Summary Background and aims Obesity has been suggested as a possible risk factor for a more severe course of COVID-19; however, conclusive evidence is lacking and few studies have investigated the role of BMI as a risk factor for admission to intensive care unit (ICU) and mortality. We retrospectively analysed a COVID-19 cohort recruited during the first 40 days of the epidemic in Italy. We examined the association between obesity and 30-day mortality, admission to ICU, mortality and length of hospital stay in patients with COVID-19. Methods and results Demographic, clinical and outcome data were retrospectively analyzed in 331 patients with COVID-19 admitted to hospital between 21 February…
Paradoxes and coping mechanisms in the servitisation journey
2022
Servitisation is conceptualised as product manufacturers' transition towards bundling products and services to offer customers enhanced value. Scholars have raised concerns regarding the potential challenges that firms face during servitisation, often termed servitisation paradoxes. Limited studies have explored the paradoxes experienced during the servitisation journey and the associated coping mechanisms. We utilise the open-ended essay methodology to unravel various paradoxes and coping mechanisms to address the gap. We collected data in two stages—from 69 participants in the first stage and 32 in the second stage. The study's findings reveal three broad paradoxes: the paradox of organis…
Analysing the fulfilment of service recovery paradox in retailing
2017
AbstractThe literature dealing with the Service Recovery Paradox (SRP) is vast, but some results are confusing and contradictory. In addition to this, scarce attention has been paid to service recovery in the context of retailing. This paper aims at verifying the compliance of the SRP in the context of retailing. Considering a sample of consumers that experienced a failure in the service delivered by a retailer and are very satisfied with the solution provided by the store employee, we test first the fulfilment of the SRP in the context of retailing. Secondly, we test the existence of significant differences in the customer satisfaction levels with the store before and after experiencing th…
Detecting multiple copies in tampered images
2010
Copy-move forgeries are parts of the image that are duplicated elsewhere into the same image, often after being modified by geometrical transformations. In this paper we present a method to detect these image alterations, using a SIFT-based approach. First we describe a state of the art SIFT-point matching method, which inspired our algorithm, then we compare it with our SIFT-based approach, which consists of three parts: keypoint clustering, cluster matching, and texture analysis. The goal is to find copies of the same object, i.e. clusters of points, rather than points that match. Cluster matching proves to give better results than single point matching, since it returns a complete and co…
The impact of moderate wine consumption on health
2014
Wine is a traditional beverage that has been associated with both healthy and harmful effects. Conceptions like the so-called "French paradox" or the beneficial impact of the Mediterranean diet suggest benefit. Wine has a complex composition, which is affected by whether it is red or white or by other variables, like the variety of grapes or others. Alcohol and phenolic compounds have been attributed a participation in the benefits ascribed to wine. The case of alcohol has been extensively studied, but the key question is whether wine offers additional benefits. Resveratrol, a non-flavonoid compound, and quercetin, a flavonol, have received particular attention. There is much experimental w…
Positron Production in Heavy Ion-Atom Collisions
1983
The question of pair creation in strong electrical fields is a very old problem. Already in 1929, within the framework of the new Dirac theory of the electron1, Klein considered the behaviour of an electron wave with a total energy E = ET + mec2 impinging on a one-dimensional step barrier potential Vo> mec2/e (fig. 1a). If the kinetic energy ET of an electron travelling on the z-axis from left to right is less than eVo, then for z>0 an exponentially damped wave function is expected as a solution of the Schrodinger equation. According to Klein’s calculations with the Dirac equation, this behaviour was also found for eVo-2mec2 <ET<eVo, but for a kinetic energy ET<eVo-2mec2 the wave function s…