Search results for "CONST"

Calcium efflux from human erythrocyte ghosts

1970

The passive Ca efflux from human red cell ghosts was studied in media of differing ion compositions and compared to the ATP-dependent Ca efflux. Cells were loaded with(45)Ca during reversible hemolysis, and the loss of radioactivity into the non-radioactive incubation medium was measured, usually for 3 hr at 37°C. Analysis of the efflux curves revealed that(45)Ca efflux followed the kinetics of a simple two-compartment system. In the concentration range between 0 and 1MM Ca in the external solution ([Ca(++)] o ), the rate constant of passive Ca efflux (k min(-1), fraction of(45)Ca lost per minute into the medium) increased from 0.00732 to 0.0150 min(-1). There was no further increase at hig…

Diferencias entre empleabilidad, inseguridad laboral y salud en trabajadores y desempleados

2018

ResumenEl desempleo y la inseguridad laboral tienen efectos negativos sobre la salud, aunque la empleabilidad podría mediar dichos efectos. El presente artículo tiene como objetivo analizar las posibles diferencias entre trabajadores y desempleados en empleabilidad y variables de salud psicosocial, así como explorar el papel de la empleabilidad y la inseguridad laboral en la salud psicosocial. Para esto, se utilizó metodología cuasiexperimental, donde se administraron una serie de cuestionarios que evaluaban empleabilidad e inseguridad laboral a 97 trabajadores (35 desempleados y 62 en activo), junto a otras variables psicosociales y de salud. Los resultados muestran que la empleabilidad es…

Drivers of CO2 emissions in the former Soviet Union: A country level IPAT analysis from 1990 to 2010

2013

There are a small number of countries that have managed to decrease emissions over the last two decades e most of them emerged from the FSU (former Soviet Union ). CO2 emissions for these countries combined have decreased by 35% between 1990 and 2010, while global emissions increased by 44%. Most studies investigate the FSU as a single block ignoring the significant and persistent diversity among countries in the region. This study is the first providing detailed country by country analyses determining factors for changes in post-Soviet republics by applying a disaggregated version of the commonly used (IPAT) index decomposition analysis including energy intensity, affluence industrializati…

A hybrid genetic algorithm with local search

2001

Abstract A hybrid genetic algorithm with internal local search was developed for optimisations involving continuous variables. The reproduction probabilities were enhanced using the fitness values obtained when a local method was applied to each individual in the population. These estimations are more realistic, since consider not the apparent but the hidden, latent quality of each individual. The information gathered in the local search was also used to build an auxiliary population recording the successfully enhanced individuals, which allowed to detect the convergence and self-adapt the search limits. The size of this auxiliary population was kept constant by a cluster analysis strategy.…

2017

Aim of the study was the development and validation of the psychometric properties of a six-item bi-factorial instrument for the assessment of social support (emotional and tangible support) with a population-based sample. A cross-sectional data set of N = 15,010 participants enrolled in the Gutenberg Health Study (GHS) in 2007–2012 was divided in two sub-samples. The GHS is a population-based, prospective, observational single-center cohort study in the Rhein-Main-Region in western Mid-Germany. The first sub-sample was used for scale development by performing an exploratory factor analysis. In order to test construct validity, confirmatory factor analyses were run to compare the extracted …

Comparison of non-Markovianity criteria in a qubit system under random external fields

2013

We give the map representing the evolution of a qubit under the action of non-dissipative random external fields. From this map we construct the corresponding master equation that in turn allows us to phenomenologically introduce population damping of the qubit system. We then compare, in this system, the time-regions when non-Markovianity is present on the basis of different criteria both for the non-dissipative and dissipative case. We show that the adopted criteria agree both in the non-dissipative case and in the presence of population damping.

A Population-Based Approach to the Resource-Constrained Project Scheduling Problem

2004

We present a population-based approach to the RCPSP. The procedure has two phases. The first phase handles the initial construction of a population of schedules and these are then evolved until high quality solutions are obtained. The evolution of the population is driven by the alternative application of an efficient improving procedure for locally improving the use of resources, and a mechanism for combining schedules that blends scatter search and path relinking characteristics. The objective of the second phase is to explore in depth those vicinities near the high quality schedules. Computational experiments on the standard j120 set, generated using ProGen, show that our algorithm produ…

Methodology, Sources and New Evidence

2018

This chapter presents the methodology used to construct the new estimates of regional GDP in Spain, breaking down the territory into NUTS3 and NUTS2 regions (provinces and autonomous communities respectively) and dividing sectors homogeneously into five production areas: agriculture, mining, manufacturing and public utilities, construction and services. Taken as a whole in combination with data on regional population, this information provides a picture of regional inequality in per-capita income in Spain over the long term, starting from the early stages of modern economic growth. This new quantitative evidence enables to point out some of the stylized facts observed in the regional distri…

Experiences of perinatal women and public healthcare providers in a community affected by the great east Japan earthquake and tsunami: Concerns that …

2020

Abstract Particular support needs of perinatal women in a disaster have been difficult to grasp through preexisting quantitative epidemiological studies. This study aimed to extract concerns that must be considered for perinatal women's mental healthcare in postdisaster settings based on lessons from the Great East Japan Earthquake. Narrative messages regarding protective and risk factors for mothers' mental health from a representative population of mothers who had given birth and all official maternal caregivers, in a coastal town devastated by the catastrophe were subjected to qualitative analyses. Eight concerns were extracted as specific support needs: (1) improve information pathways,…

Evaluación y Calidad de la Docencia en el Marco del Derecho a la Educación de la Constitución Española

2017

Si algo caracteriza el análisis del desempeño docente y profesional en el siglo XXI, en todas las áreas de actividad, es el recurso a la evaluación como sinónimo de calidad y credibilidad. Basándonos en las investigaciones existentes la evaluación docente se percibe todavía, a pesar de la omnipresencia a la que se acaba de aludir, como una amenaza, esto es, desde una perspectiva sancionadora, creando polémica y malestar. Es interesante investigar esa tendencia, ya que, la evaluación de profesorado en el Sistema Educativo Español se utiliza sin consecuencias negativas para los docentes. Si se evalúa al profesor es en su propio beneficio (disfrutar de licencias por estudios, promoción, desarr…