Search results for "Minimum"
showing 10 items of 327 documents
European traditional tomatoes galore: a result of farmers' selection of a few diversity-rich loci
2022
A comprehensive collection of 1254 tomato accessions, corresponding to European traditional and modern varieties, early domesticated varieties, and wild relatives, was analyzed by genotyping by sequencing. A continuous genetic gradient between the traditional and modern varieties was observed. European traditional tomatoes displayed very low genetic diversity, with only 298 polymorphic loci (95% threshold) out of 64 943 total variants. European traditional tomatoes could be classified into several genetic groups. Two main clusters consisting of Spanish and Italian accessions showed higher genetic diversity than the remaining varieties, suggesting that these regions might be independent seco…
What Explains Prevalence of Informal Employment in European Countries: The Role of Labor Institutions, Governance, Immigrants, and Growth
2011
This paper looks into institutional and other macro determinants of prevalence of informal dependent employment, as well as informal self-employment, in European countries, using European Social Survey data on work without legal contract in on 30 countries, covering years 2004-2009. Consistently with theoretical predictions, quality of business environment has a significant negative impact on prevalence of both types of informal employment. The share of non-contracted employees is negatively affected by perceived quality of public services and positively related to economic growth. Informal self-employment is positively related to growth in Europe at large, as well as in Eastern and Souther…
Unemployment and the Earnings Structure in Latvia
2005
Latvia has recorded sustained GDP and productivity growth since 1997. Yet unemployment rates, despite gradual decrease, have remained high. The paper explores the mysteries of unemployment in Latvia. It analyzes labor flows between employment, unemployment, and nonparticipation and finds the following results: The type of education and the region of residence appear to be the most important determinants of success in finding jobs by the unemployed. The unemployed from ethnic minorities have lower chances to find a job within a year, other things equal, while the difference between genders is not significant. However, neither ethnicity nor gender seems to matter as far as the transition from…
What Makes for Fair Schooling?
2007
Slogans calling for “une ecole juste” (fair schooling) are often as vague as they are effective in mobilising public opinion: though there is apparent agreement on the desirability of greater fairness in education, the matter of defining fair schooling parameters is extremely complex and riddled with ambiguity.
Effects of Raising Minimum Wage: Theory, Evidence and Future Challenges
2013
Abstract Minimum wage is one of the most studied topics in economics. This paper examines some of the most important issues related to the effects of raising minimum wage, based on new contributions in theoretical and empirical research, roughly since 2008. Our purpose was to find in the literature an explanation for the recent raise of minimum wage, in some European Union countries and United States and to identify possible effects of this evolution. Most of the studies point little or no employment response to modest increases in the minimum wage, but we argue there are some other effects to consider.
Size-intensive decomposition of orbital energy denominators
2000
We introduce an alternative to Almlöf and Häser’s Laplace transform decomposition of orbital energy denominators used in obtaining reduced scaling algorithms in perturbation theory based methods. The new decomposition is based on the Cholesky decomposition of positive semidefinite matrices. We show that orbital denominators have a particular short and size-intensive Cholesky decomposition. The main advantage in using the Cholesky decomposition, besides the shorter expansion, is the systematic improvement of the results without the penalties encountered in the Laplace transform decomposition when changing the number of integration points in order to control the convergence. Applications will…
Biological Responses of <I>Rhynchophorus ferrugineus</I> (Coleoptera: Curculionidae) to <I>Steinernema carpocapsae</I> (Nemat…
2013
Rhynchophorus ferrugineus (Olivier 1790) (Coleoptera: Curculionidae) is becoming a serious problem in Mediterranean areas where it is well-adapted, and now is present even in the United States (California). The infestations are primarily in urban areas where chemical control is not advisable and million of Euros are spent to control it. The effects of the entomopathogenic nematode Steinernema carpocapsae (Nematoda: Steinernematidae) on mortality, growth, as well as the immune activity of R. ferrugineus larvae, were investigated. R. ferrugineus mortality exhibited a positive trend with the dosage and duration of exposure to S. carpocapsae. The median lethal dose and median lethal time, impor…
Economic evaluation of biogas plant size utilizing giant reed
2015
Abstract Amongst energy crops for the production of biomass feedstock for biogas plants, giant reed (Arundo donax L) has been attracting attention in recent years in Italy. Undoubtedly, this is due to its potentially high yield in terms of biomass, low agronomic inputs, as well as for being eligible for European Union energy crop incentives. The aim of this study was to perform an analysis of plant costs considering three macro-categories (biomass, plant installation and transport). Also, we aimed to describe the economic performances of biogas plants, while progressively altering two key variables. Specifically, we considered electrical power capacity (in the 100–999 kW range) and several …
Method to find the Minimum 1D Linear Gradient Model for Seismic Tomography
2016
The changes in the state of a geophysical medium before a strong earthquake can be found by studying of 3D seismic velocity images constructed for consecutive time windows. A preliminary step is to see changes with time in a minimum 1D model. In this paper we develop a method that finds the parameters of the minimum linear gradient model by applying a two-dimensional Taylor series of the observed data for the seismic ray and by performing least-square minimization for all seismic rays. This allows us to obtain the mean value of the discrete observed variable, close to zero value.
A Nonlinear Observer for Rotor Flux Estimation of Induction Motor Considering the Estimated Magnetization Characteristic
2017
This paper proposes a nonlinear observer for induction machine drives based on space-vector dynamic model of induction machine, expressed in state form, which presents the peculiarity of taking into consideration the magnetic saturation of the iron core. This observer is particularly suitable in order to obtain high accuracy in rotor flux estimation, in both amplitude and phase position, during working conditions characterized by varying flux, among which the most important are those during electrical losses minimization. A Lyapunov-based convergence analysis is proposed in order to suitably compute the numerical observer gain guaranteeing the convergence of the estimation error. The propos…