Search results for "character"

Sensitivity of SHG-FROG for the characterization of ultrahigh-repetition-rate telecommunication laser sources

2004

International audience; We analyze experimentally the sensitivity of second-harmonic generation frequency-resolved optical gating (SHG-FROG) for the complete intensity and phase characterization of both a sinusoidal beat signal and a train of 1.3 ps pulses at a repetition rate of 160 GHz at 1550 nm. Using a commercially-available optical spectrum analyzer in the SHG-FROG set-up, incident pulses with energies of only 125 and 190 fJ, which correspond to the beat signal and the 1.3 ps pulse train, respectively, have been accurately characterized.

Minimum contrast for point processes' first-order intensity estimation

2023

In this paper, we exploit some theoretical results, from which we know the expected value of the K-function weighted by the true first-order intensity function of a point pattern. This theoretical result can serve as an estimation method for obtaining the parameter estimates of a specific model, assumed for the data. The only requirement is the knowledge of the first-order intensity function expression, completely avoiding writing the likelihood, which is often complex to deal with in point process models. We illustrate the method through simulation studies for spatio-temporal point processes.

Assessment of wastewater treatment alternatives for small communities: An analytic network process approach

2015

The selection of the most appropriate wastewater treatment (WWT) technology is a complex problem since many alternatives are available and many criteria are involved in the decision-making process. To deal with this challenge, the analytic network process (ANP) is applied for the first time to rank a set of seven WWT technology set-ups for secondary treatment in small communities. A major advantage of ANP is that it incorporates interdependent relationships between elements. Results illustrated that extensive technologies, constructed wetlands and pond systems are the most preferred alternatives by WWT experts. The sensitivity analysis performed verified that the ranking of WWT alternatives…

Development of perceived competence, tactical skills, motivation, technical skills, and speed and agility in young soccer players

2015

The objective of this 1-year, longitudinal study was to examine the development of perceived competence, tactical skills, motivation, technical skills, and speed and agility characteristics of young Finnish soccer players. We also examined associations between latent growth models of perceived competence and other recorded variables. Participants were 288 competitive male soccer players ranging from 12 to 14 years (12.7 ± 0.6) from 16 soccer clubs. Players completed the self-assessments of perceived competence, tactical skills, and motivation, and participated in technical, and speed and agility tests. Results of this study showed that players' levels of perceived competence, tactical skill…

An efficient synthetic vision system for 3D multi-character systems

2003

This poster deals with the problem of sensing virtual environments for 3D intelligent multi-character simulations. As these creatures should display reactive skills (navigation or gazing), together with the necessary planning processes, required to animate their behaviours, we present an efficient and fully scalable sensor system designed to provide this information (low level + high level) to different kinds of 3D embodied agents (games, storytelling, etc).

Isolation and characterisation of autochthonous Saccharomyces cerevisiae from 'Pago' Merlot wines of Utiel-Requena (Spain) origin

2022

[EN] Background and Aims To achieve both the control of the undesirable yeasts and the improvement of the characteristics of Merlot 'Pago' wines, Saccharomyces cerevisiae yeast diversity was investigated in a spontaneous 'Pago' Merlot fermentation from the Utiel-Requena region (Spain). Isolates of S. cerevisiae were characterised by a holistic procedure using the same Merlot grape must from which they were isolated. Methods and Results Yeasts were identified by internal transcribed spacer analysis and typed by HinfI mDNA restriction analysis. Growth and metabolic characteristics of the isolates were determined by laboratory-scale (50 L) fermentations of Merlot must and the composition of th…

Survey on the prevalence of leptospira infections in the Italian population.

1994

This investigation is the first nationwide survey on the circulation of leptospira infections in human beings in Italy. In nine out of twenty Italian regions, representative samples of the population were investigated for the presence of leptospira infections. Unexpectedly, leptospira infections were found to be widespread, the number of cases being much higher than the diagnosed clinical cases. There were found to be high, medium, and low risk areas. On the whole, the risk for the rural population was no higher than the risk for urban dwellers; leisure activities, contact with animals and residence on the plain versus residence in the hills were important risk factors. There was an unident…

An Economic Characterization of the Concept of «Merit Goods»: The Case of Higher Education Service

1997

La giustificazione dei finanziamenti pubblici per l’istruzione superiore ha dato luogo a molte discussioni. Gran parte degli studi di economia dell’istruzione ne ha messo in evidenza la giustificazione economica, basata sulla presenza di effetti esterni derivanti da una maggiore istruzione. Tuttavia, perchè queste argomentazioni possano valere, è necessario che ricorrano due condizioni: che i benefici esterni siano marginali e che non possano essere internalizzati. Peraltro, la spiegazione del massiccio ricorso al finanziamento pubblico dell’istruzione superiore richiede altre argomentazioni. Tra queste sembra interessante l’impostazione secondo cui l’istruzione superiore è soggetta a due t…

The set of character degrees of a finite group does not determine its solvability

2014

Semidirect products of internal groupoids

2010

We give a characterization of those finitely complete categories with initial object and pushouts of split monomorphisms that admit categorical semidirect products. As an application we examine the case of groupoids with fixed set of objects. Further, we extend this to the internal case. (C) 2010 Elsevier B.V. All rights reserved.