Search results for "Method"

L'évolution de la représentation des médias de communication : le cas d'Internet

2008

the aim of this study is to show the evolution of the social representation of an object which gradually anchored in daily practices. Our approach is longitudinal the study took place during 5 years. 315 subjects were divided in 3 independent groups of regular users of Internet. Measurement was done at 3 times: in 2001, 2003 and 2005. Subjects are solicited for a verbal association task. Results are treated by a lexical analysis followed by a prototypic analysis (VERGES, 1992). Results show an important evolution of general organization of elements constituting the social representation. Discussion underlies two main points. First concerns modifications appearing inside the representation d…

Revista electrónica de investigación y evaluación educativa

2014

Resumen tomado de la publicación Título, resumen y palabras clave en inglés y español La igualación equipercentil es un método estadístico en el cual los puntajes crudos de dos versiones de una prueba se consideran igualados si ellos corresponden al mismo rango percentilar en un grupo de examinados. En la igualación equipercentil se presenta una curva para describir las diferencias de dificultad de versión a versión. Se tiene como objetivo estimar la igualación equipercentil sin suavizado de las versiones 3 y 4, con la versión 2, por área temática del Examen de Habilidades y Conocimientos Básicos (EXHCOBA) que utiliza la Universidad Autónoma de Baja California (UABC) para la selección de as…

Inter and intra-guild interactions in egg parasitoid species of the soybean stink bug complex

2002

Abstract – The objective of this research was to evaluate the parasitism behavior of Telenomus podisiAshmead, Trissolcus basalis (Wollaston) e Trissolcus urichi Crawford (Hymenoptera: Scelionidae) oneggs of Nezara viridula L., Euschistus heros F., Piezodorus guildinii Westwood and Acrosternumaseadum Rolston (Heteroptera: Pentatomidae), in no choice and multiple choice experiments. For allparasitoid species, the results demonstrated the existence of a main host species that maximizes thereproductive success. The competitive interactions among the parasitoid species were investigated inexperiments of sequential and simultaneous release of different combinations of parasitoid pairs on thehosts…

A comparative analysis of the sustainability of rice cultivation technologies using the analytic network process

2010

Sustainability of local farming systems and technologies is a very important issue that faces notorious measurement difficulties. Multi-criteria methods may help researchers to solve empirical problems in the construction of composite sustainability indicators and in ranking agricultural technologies according to their sustainability. This paper shows how a multi-criteria decision-making technique, the Analytic Network Process (ANP), can be fruitfully employed to this end. Contrary to simpler and hierarchical goal-criteria-alternative approaches, in ANP all the elements in the network can be related in any possible way, which means that a network can incorporate feedback and interdependent …

Mārketinga pasākumi klientu piesaistei uzņēmumā “Wake Up".

2020

Bakalaura darba tēma “Mārketinga pasākumi klientu piesaistei uzņēmumā “Wake Up.” Aktīvās atpūtas pakalpojumu sniedzēju skaitam pieaugot, nepieciešamas strukturētas darbības, kas ved pie klientu piesaistīšanas konkrētajam uzņēmumam. Informācijas kanālu daudzveidības un sabiedrības paradumu dēļ, nepieciešams pielāgot uzņēmuma mārketinga darbību. Šī bakalaura darba mērķis ir izveidot praktiskus ieteikumus, kas veicinātu klientu piesaisti uzņēmumā “Wake Up”, balstoties uz mārketinga teorētiskās informācijas analīzi, autoru viedokļiem, konkurentu darbībām un veiktā pētījuma rezultātiem. Darbs sastāv no 3 nodaļām. Pirmajā no tām tiek aplūkoti teorētiskie aspekti mērķtirgus noteikšanā un, kā iespē…

Review: Electrostatically actuated nanobeam-based nanoelectromechanical switches – materials solutions and operational conditions

2018

This review summarizes relevant research in the field of electrostatically actuated nanobeam-based nanoelectromechanical (NEM) switches. The main switch architectures and structural elements are briefly described and compared. Investigation methods that allow for exploring coupled electromechanical interactions as well as studies of mechanically or electrically induced effects are covered. An examination of the complex nanocontact behaviour during various stages of the switching cycle is provided. The choice of the switching element and the electrode is addressed from the materials perspective, detailing the benefits and drawbacks for each. An overview of experimentally demonstrated NEM swi…

Etude en champ proche et en champ lointain de composants périodiquement nanostructurés : cristaux photoniques et tamis à photons

2004

Recently, a new class of optical components is appeared. Its main characteristic is to be formed by a periodical sub-wavelength pattern, leading to the apparition of a spectral domain where propagation of light inside the structure is forbidden -- a photonic bandgap. This work is devoted to the study in the near- and far-field of two kinds of periodical optical components: photonic crystals (PCs) and nanostructured metallic films that exhibit the so-called enhanced transmission. First, we study two-dimensional PCs with a scanning near-field optical microscope (SNOM) in collection mode. With this SNOM, we directly map the intensity distribution inside PC-based microcavities. We also evidence…

STUDIO DELLE PROPRIETÀ MECCANICHE ED ELETTROMECCANICHE DI NANOCOMPOSITI E NANOFIBRE MEDIANTE APPROCCI NUMERICI

Developing emergent literacy in infant schools: a laboratory experience for the construction of the written language

2017

Research, including the educational neuroscience, has highlighted the close relationship between emerging literacy and subsequent learning of reading and writing. Early verification of symbolic and linguistic skills is essential to support the development, and recovery strategies are to be prepared in case of early signs of difficulty. In some infant schools in the Palermo area we carried out a laboratory of the last 45 hours, according to a specific methodological setting, with a dual aim: a) developing the emerging areas of literacy in preschool, b) providing teachers with an objective approach to detect in children reading and writing readiness. The study investigated phonological, lexic…

Comparison of different theory models and basis sets in the calculation of 13C NMR chemical shifts of natural products.

2004

The influence of the calculation method in mimicking experimental 13C NMR chemical shifts of 15 low-polarity natural products singularly containing 10–20 carbon atoms was investigated by employing different quantum chemistry approaches and basis sets, both in the preliminary geometry optimizations and in the following single-point 13C GIAO calculations of the NMR chemical shifts. The geometries of the involved species were optimized at the PM3, HF, B3LYP and mPW1PW91 levels whereas the 13C NMR parameters were determined at the HF, B3LYP and mPW1PW91 levels. Different combinations of basis sets were also tested. The consistency and efficiency of the considered combinations of geometry optimi…