Search results for "difference"
showing 10 items of 1534 documents
On lead-scandium tantalate solid solutions with high electrocaloric effect
1992
Abstract The PbSc0,5Ta0,5O3 solutions are found to be a useful material for active elements of microcryogenic devices based on electrocaloric effect. A temperature difference of ΔT = 1. 0-1.8 K at field intensities 20–30 kV/cm in the interval of 210–310 K can be achieved by simultaneous or separate introducing of Sb and Co ions in B-sites of the lattice. The most important contribution to the electrocaloric effect is due to field-induced Fn3m → R3m phase transition in the case of high ordering of B-ions in the perovskite structure ABO3.
Association between osteocalcin and cognitive performance in healthy older adults.
2016
INTRODUCTION: cognitive deterioration and reductions of bone health coincide with increasing age. We examine the relationship between bone composition and plasma markers of bone remodelling with measures of cognitive performance in healthy adults.METHODS: this cross-sectional study included 225 old (52% women, mean age: 74.4 ± 3.3 years) and 134 young (52% women, mean age: 23.4 ± 2.7 years) adult participants from the MyoAge project. Whole body bone mineral density was measured by dual-energy X-ray absorptiometry. Blood analyses included a panel of bone-related peptides (dickkopf-1, osteoprotegerin, osteocalcin (OC), osteopontin, sclerostin, parathyroid hormone and fibroblast growth factor …
Physical activity and exercise in mild cognitive impairment and dementia::an umbrella review of intervention and observational studies
2020
Objectives:\ud \ud The aim of this umbrella review was to determine the effect of physical activity/exercise on improving cognitive and noncognitive outcomes in people with MCI (mild cognitive impairment) and dementia.\ud \ud Design:\ud \ud Umbrella review of systematic reviews (SR), with or without meta-analyses (MAs), of randomized controlled trials (RCTs) and observational studies.\ud \ud Settings and Participants:\ud \ud People with MCI or dementia, confirmed through validated assessment measures. Any form of physical activity/exercise was included. As controls, we included participants not following any prespecified physical activity/exercise intervention or following the same standard…
A Collector Deceives—About the Ways of Deceiving Women by Men and Men by Women as far as Spending Money on Collecting Items Is Concerned
2022
The presented research shows that neither women nor men are honest with their partners when informing them about the amount of money spent on collecting items. Their behaviour may show signs of addiction to collecting. Men in comparison to women spend more and are less likely to lower the amounts of money spent on collected items. Those who earn more spend more on their collections. Women and men also use different techniques of hiding their expenses. Women do not inform about their expenses using denying techniques (such as saying that it was bought/borrowed a long time ago, etc.), whereas men inform about expenses but use preventive techniques (such as exchange). What is more, men tend to…
Una aproximación a las concepciones de estudiantes preuniversitarios y universitarios sobre pilas galvánicas
2014
En el presente trabajo se han investigado las concepciones alternativas sobre pilas galvánicas y las interpretaciones de los procesos que tienen lugar en una pila voltaica simple. Han participado en él 55 estudiantes del 2º de Bachillerato español (curso previo al ingreso en la universidad) y 43 estudiantes de primer año del Grado de Química. El análisis comparativo de los resultados de la administración de un test y de una pregunta abierta revela que: a) Tanto los estudiantes de 2º de bachillerato como los de 1º de Grado sostienen concepciones erróneas sobre pilas galvánicas; b) No hay diferencias significativas en las concepciones e interpretaciones entre ambos grupos de estudiantes, y c)…
R&D subsidies and productivity in SMEs
2015
This paper examines the effect of R&D subsidies on labour productivity. We use firm-level data on Finnish SMEs from 2000 to 2012 and apply a combined matching and difference-in-differences method to control for selection bias. We find no significant positive effect on labour productivity over the five-year period after a subsidy is granted. However, the results vary over time and indicate a 2–4 % negative effect on SMEs’ annual productivity growth one to 2 years after the subsidy year. Nevertheless, subsidies generate a positive employment effect and enhance firm survival. Additional scrutiny reveals that subsidies positively affect the human capital level of low-skill firms. peerReviewed
Decentering, Acceptance, and Non-Attachment : Challenging the Question "Is It Me?"
2021
Among mindfulness measures the three constructs acceptance, decentering, and non-attachment are psychometrically closely related, despite their apparent semantic differences. These three facets present robust psychometric features and can be considered core themes in most “third wave” clinical models. The aim of the present study was to explore the apparently different content domains (acceptance, decentering, and non-attachment) by administering various psychometric scales in a large sample of 608 volunteers. Resilience and depression were also assessed. Exploratory and confirmatory factor analyses performed in two randomly selected subsamples showed a bifactor approximation. The explained…
Questions and controversies in the study of time-varying functional connectivity in resting fMRI.
2020
The brain is a complex, multiscale dynamical system composed of many interacting regions. Knowledge of the spatiotemporal organization of these interactions is critical for establishing a solid understanding of the brain’s functional architecture and the relationship between neural dynamics and cognition in health and disease. The possibility of studying these dynamics through careful analysis of neuroimaging data has catalyzed substantial interest in methods that estimate time-resolved fluctuations in functional connectivity (often referred to as “dynamic” or time-varying functional connectivity; TVFC). At the same time, debates have emerged regarding the application of TVFC analyses to re…
Clinical manifestations of cancer in patients with acute pulmonary embolism
2023
Background Neoplasmatic disease increases the risk of acute pulmonary embolism (APE) by different pathophysiological mechanisms that favor thrombosis in patients with cancer. Recently, the role of cancer (active and occult) in the prevalence of venous thromboembolism has been discussed more thoroughly in the subject literature. Material Medical records of 366 consecutive patients with a diagnosis of APE (aged: mean = 65.0 ± 16.6, median = 68, range = 19–94; men = 41%/women = 59%) were collected with a wide range of demographic data, medical history of coexisting diseases, computer examination, and laboratory tests. Methods The APE patients were analyzed in two groups: negative cancer cases …
Gender differences in coronary heart disease in elderly population
2017
Coronary heart diseases (CHDs) represent one of the leading causes of death in developed countries, and particularly in elderly populations. There are several genderspecific differences in the risk factors, presentation, management, and prognosis of CHDs in middle-aged and elderly adults. Elderly women, for example, tend to present with these diseases at an older age compared to men and are characterized by a greater number of risk factors and comorbidities at diagnosis. As far as symptomatic acute coronary syndromes are concerned, older women are less likely to report critical arterial obstruction, but seem to be more frequently affected by adverse outcomes and higher mortality. These feat…