Search results for "ACCOMMODATION"
showing 10 items of 123 documents
Changes in physiological astigmatism of human eye during accommodation in emmetropes (Conference Presentation)
2017
Introduction: Most young emmetrope eyes are far from ideal and have some degree of minor spherocylindrical error including also physiological astigmatism. Because of the changes in the shape of optical interfaces, pupil size, eyelid pressure, tear film, body posture, binocularity and accommodation astigmatism is considered as constantly dynamic phenomenon (Cheng et al, 2004). The purpose of this study was to evaluate and quantify changes in physiological astigmatism during accommodation. Method: Twenty young emmetropes with mean age 24 ± 4 years were selected for the study. Refraction and accommodative response were measured monocularly for dominant eye with an open-field infrared autorefract…
Accommodation in human eye models: a comparison between the optical designs of Navarro, Arizona and Liou-Brennan.
2017
Aim To simulate and compare accommodation in accommodative and non-accommodative human eye models. Methods Ray tracing and optical design program was used. Three eye models were designed and studied: the Navarro, the Arizona and the Liou-Brennan. In order to make the Navarro and Liou-Brennan models to accommodate, specific geometric parameters of the models were altered with values that were chosen from the literature. For the Arizona model, its' mathematical functions for accommodation were used for the same accommodative demands. The simulation included four distances of accommodation for each model: at infinity, 3, 1 and 0.5 m.The results were diffraction images of a "letter F" for graph…
Akomodācijas atpalikšana pirms un pēc tuvuma darba
2015
Bakalaura darbs uzrakstīts latviešu valodā, datorsalikumā uz 39 lappusēm un satur 14 attēlus, 2 tabulas, un tajā ir izmantots 30 literatūras avoti. Darba mērķis: Darba mērķis ir noskaidrot, kā akomodācijas atpalikšanu ietekmē tuvuma darbs pie datora monitora un cik ātri normalizējas šī akomodācijas atpalikšana, izmantojot modificēto retinoskopijas metodi. Metode: ar modificētās dinamiskās retinoskopijas Nott metodi tika novērtēta akomodācijas atpalikšana un tās izmaiņas eksperimenta dalībniekiem 2 stundu gara tuvuma darba laikā pie datora monitoriem un tika mērīts laiks, cik ātri akomodācijas atpalikšanas vērtība normalizēsies pēc tuvuma darba. Rezultāti un secinājumi: Akomodācijas atpalikš…
Language Mediation and Aspects of Accommodation in the Use of ELF
2014
There are numerous varieties of English spoken in Italy today, each repre-sented by one or more of the various migrant communities living in the country. These manifestations of World englishes reflect a wide range of lexical, syntactical, phonetic, pragmatic, interpersonal and cultural features. This paper argues that an interpreter or language mediator trained in standard English may not necessarily be able to comprehend or make him/herself understood adequately in other varieties of English. Thus, the recruitment of mediators/interpreters requires a certain amount of caution in terms of language choice. In order to investigate intelligibility, comprehensibility and accommodation in the c…
Sharing economy and incumbents' pricing strategy: The impact of Airbnb on the hospitality industry
2019
Abstract In this paper, we examine how the emergence of sharing economy platforms influences incumbents' price responses. Grounding on the literature on price reactions to new entrants and on the unique characteristics of the sharing economy, we argue that the effect of the penetration of the sharing economy on incumbents' prices is not straightforward, and actually depends on the type of incumbents as well as certain product/service offer characteristics. Indeed, relying on a large sample of hotel price offerings from the Italian market, we find that the effect of the growing relevance of the sharing economy (exemplified by Airbnb) on incumbents' prices depends on the type of incumbents (l…
Work-related and personal predictors of COVID-19 transmission: evidence from the UK and USA
2021
ObjectiveTo develop evidence of work-related and personal predictors of COVID-19 transmission.Setting and respondentsData are drawn from a population survey of individuals in the USA and UK conducted in June 2020.Background methodsRegression models are estimated for 1467 individuals in which reported evidence of infection depends on work-related factors as well as a variety of personal controls.ResultsThe following themes emerge from the analysis. First, a range of work-related factors are significant sources of variation in COVID-19 infection as indicated by self-reports of medical diagnosis or symptoms. This includes evidence about workplace types, consultation about safety and union memb…
A description model for regeneration through urban tourism in rural towns with underused historic real estate
2016
Il presente contributo propone un modello di descrizione (description model) che trova applicazione in una situazione reale di aiuto alla decisione posto dall'urbanista per lo sviluppo turistico delle città rurali nelle zone dell'entroterra siciliano. Il problema decisionale riguarda la città di Cianciana (AG), che negli ultimi anni si è resa protagonista di un particolare fenomeno di turismo internazionale. In particolare, proponiamo un quadro valutativo multicriteriale per la riqualificazione fisica ed economica del centro storico della città attraverso lo sviluppo del turismo. Il modello presentato, relativo a un problema decisionale di tipo descrittivo, è orientato a supportare i deciso…
Scad-elastic net and the estimation of individual tourism expenditure determinants
2014
This paper introduces the use of scad-elastic net in the assessment of the determinants of individual tourist spending. This technique approaches two main estimation-related issues of primary importance. So far studies of tourism literature have made a wide use of classic regressions, whose results might be affected by multicollinearity. In addition, because of the absence of robust economic theory on tourism behavior, regressor selection is often left to researcher's choice when not driven by non-optimal automatic criteria. Scad-elastic net is an OLS model that accounts for both these problems by including two types of parameters constraints, namely the smoothly clipped absolute deviation …
The Role of Industry in the Prevalence of Overeducation in Europe
2015
Abstract This paper performs a detailed study on the interaction between industry and the risk of overeducation using European Social Survey Round 5 data on 27 countries. Administrative and accommodation industries have the largest overeducation levels. When macro-level variables are included in the overeducation model, finance and public administration join these industries in being significantly more open to overeducation than manufacturing. Construction is the only industry with significantly lower overeducation risk than manufacturing. The exposure to overeducation in different industries reflects clear consequences of traditional association of men and women with different industries. …
Evolution of Tourist Accommodation Structures in Romanian's Developing Regions in the Context of New Challenges at European Level
2013
Abstract This paper analyzes the evolution of tourist structures with functions of tourist accommodation in the eights development regions of Romania Romania. Given the financial crisis, the differences between regions in terms of tourism infrastructure have accentuated. Investments to modernize tourist infrastructure and resorts can certainly revive tourism in many regions, which in its turn can help the economic growth of the area.