Search results for " Theory"
showing 10 items of 23462 documents
Estudio de variación en el uso de atenuación I: Hacia una descripción de patrones dialectales y sociolectales de la atenuación en español
2020
Resumen La atenuación es un fenómeno pragmático de gran complejidad que se ha convertido en objeto de estudio priorizado en las últimas décadas, en las que se ha abordado, especialmente, desde disciplinas que trabajan con el habla, como la pragmática y el análisis del discurso. Uno de los aspectos menos trabajado en relación con las estrategias de atenuación en español, no obstante, es la variabilidad sociopragmática y geolectal en usos y recursos de atenuación. Este último es el cometido fundamental de este trabajo -que se complementa con la investigación presentada en el artículo de Albelda y Cestero (en este mismo volumen, 2020)-, en el que se pretende dar cuenta del estado actual de la …
Variational approach for analysis of harmonic vibration and stabiligy of moving panels
2014
In this paper, the stability of a simply supported axially moving elastic panel (plate undergoing cylindrical deformation) is considered. A complex variable technique and bifurcation theory are applied. As a result, variational equations and a variational principle are derived. Analysis of the variational principle allows the study of qualitative properties of the bifurcation points. Asymptotic behaviour in a small neighbourhood around an arbitrary bifurcation point is analyzed and presented. It is shown analytically that the eigenvalue curves in the (ω, V0) plane cross both the ω and V0 axes perpendicularly. It is also shown that near each bifurcation point, the dependence ω(V0) for each m…
The Effect of Predator Population Dynamics on Batesian Mimicry Complexes.
2022
Understanding Batesian mimicry is a classic problem in evolutionary biology. In Batesian mimicry, a defended species (the model) is mimicked by an undefended species (the mimic). Prior theories have emphasized the role of predator behavior and learning as well as evolution in model-mimic complexes but have not examined the role of population dynamics in potentially governing the relative abundances and even persistence of model-mimic systems. Here, we examined the effect of the population dynamics of predators and alternative prey on the prevalence of warning-signaling prey composed of models and mimics. Using optimal foraging theory and signal detection theory, we found that the inclusion …
Can warning signals be honest? : wing colouration and the strength of chemical defence in the female wood tiger moth (Parasemia plataginis)
2016
The warning displays of aposematic organisms signal to predators that they possess a secondary defence and are unprofitable. Within species variation exists in the strength of the signal and defence. As natural selection is expected to favour higher levels of defence, variation in such traits requires explanation. One hypothesis is that the strength of primary and secondary defences are correlated as they reflect the condition of the signaller. This study explores if variation in individual conspicuousness is an honest signal of the level of defence in the wood tiger moth (Parasemia plantaginis). P. plantaginis has conspicuous hind wing warning colouration, which in females varies from yell…
Egyén és közösseg : Jean-Paul Sartre Critique de la raison dialectique című műve a magyar recepció tükrében
2009
The effects of two-way communication and chat service usage on consumer attitudes in the e-commerce retailing sector
2018
In e-commerce retailing (e-retailing), where competitors are only one click away and prices are easy to compare, providing superior customer service and reciprocal communication via a company’s website are important aspects of attracting and retaining customers. One increasingly popular solution to improve customer service is a “live chat” interface that allows consumers to have real-time conversations online with customer service agents. As the literature on the impacts of real-time communication via live chat is currently very limited, this study develops and tests a model that demonstrates the moderating effects of a chat service on the relationship between two-way communication (i.e., a…
Sana-assosiaatioverkkojen koheesion yhteys ryhmädynamiikkaan
2016
Tässä pilottitutkimuksessa selvitettiin sana-assosiaatioiden koheesiota ryhmissä. Tarkoituksena oli selvittää, löytyykö yhtenäisyyttä ryhmän keskinäisen toimeen tulemisen välillä ja sen suhteen, kuinka ryhmät assosioivat sanoja. Assosiaatioiden koheesion mittaamisessa käytettiin pohjatietona muistiteorioita ja verkkoteoriaa. Koehenkilöt olivat Jyväskylän yliopistossa järjestetyn kurssin oppilaita, jotka jakaantuivat ryhmiin. Kurssin aluksi ensimmäiset assosiaatiotehtävät teetettiin oppilailla. Kurssin loputtua he tekivät kaksi uutta tehtävää sekä ensimmäiset tehtävät, jotta osalle tehtävistä saatiin kaksi eri mittauspistettä. Kurssin oppilaat sekä vetäjät täyttivät kurssin loputtua ryhmän k…