Search results for "FACTOR"

Educational Technology Goes Mobile

2018

Recent decades have revealed that the digital educational technology that is expected to revolutionise schooling for generations to come, is fraught with challenges. One major challenge is that educational systems vastly vary between cultures and countries. The differences start from the conceptualisation of education and school. It is, therefore, quite inaccurate to handle education as a universal concept. In this article the authors evade generalisation by discussing the use of mobile technology in the schools of one single, relatively homogenous nation: Finland. The backbone of their analysis is the core national curriculum of basic education. The appropriateness of mobile technology in …

Cross-Cultural Factors in Experiencing Online Video Contents in Product Marketing

2017

Although online shops represent convenient tools to buy and sell products, they do not offer as rich multisensory experiences than physical retailing offers. Audio-visual contents could provide dynamic multisensory information and offer more engaging experiences. However, to be successful, audio-visual contents need to be adjusted to the cultural characteristics of the users. This manuscript presents a study in which Spanish and Finnish participants interacted with audiovisual products depicting videos of the brand design. Through content analysis of participants' verbalizations, the authors identified categories and subcategories that defined the representation of the video elements and th…

Operator Revenue Analysis for Device-to-Device Communications Overlaying Cellular Network

2018

Device-to-device (D2D) communications has recently gathered significant research interest due to its efficient utilization of already depleting wireless spectrum. In this article, we considered a scenario where D2D users communicate in the presence of cellular users in an overlay network setup. In order to analyze the revenue of service providers in monetary terms, the paper provides exact expressions of operator profit for both D2D and cellular users. More specifically, we take into account different network parameters including user density, transmit power and channel variations to understand their impact on the total revenue of the operator. Finally, we derive the balancing value of freq…

Visual Distraction Effects of In-Car Text Entry Methods

2017

Three text entry methods were compared in a driving simulator study with 17 participants. Ninety-seven drivers’ occlusion distance (OD) data mapped on the test routes was used as a baseline to evaluate the methods’ visual distraction potential. Only the voice recognition-based text entry tasks passed the set verification criteria. Handwriting tasks were experienced as the most demanding and the voice recognition tasks as the least demanding. An individual in-car glance length preference was found, but against expectations, drivers’ ODs did not correlate with incar glance lengths or visual short-term memory capacity. The handwriting method was further studied with 24 participants with instru…

Design of a Cleaning Program for a PV Plant Based on Analysis of Energy Losses

2015

Solar photovoltaic (PV) energy has grown significantly over the past few years. However, despite the increase in installed capacity, this energy source still raises important concerns related to the variability of power production. The short-term effects such as cloud shadowing and supply interruptions, as well as long-term effects such as dust accumulation, seasonal variation, and ageing of PV modules, can cause variability of power production. Therefore, the analysis of all the variability sources in order to provide statistically consistent power production data is an important challenge. This study presents a methodology to analyze data from a PV plant in order to have an independent ev…

How news affect the trading behavior of different categories of investors in a financial market

2015

We investigate the trading behavior of a large set of single investors trading the highly liquid Nokia stock over the period 2003-2008 with the aim of determining the relative role of endogenous and exogenous factors that may affect their behavior. As endogenous factors we consider returns and volatility, whereas the exogenous factors we use are the total daily number of news and a semantic variable based on a sentiment analysis of news. Linear regression and partial correlation analysis of data show that different categories of investors are differently correlated to these factors. Governmental and non profit organizations are weakly sensitive to news and returns or volatility, and, typica…

La ceramica sovradipinta bizantina di Gortina

2008

EMMA VITALE (2008). La ceramica sovradipinta bizantina di Gortina. p. 1-304, PADOVA:Aldo Ausilio Editore in Padova-Bottega d''Erasmo, ISBN: 978-88-6125-071-0 The Byzantine painted pottery from the Gortys excavations represents a new class among the painted pottery productions which spread over the Mediterranean basin since the end of the 6th century AD. The first finds came to light around the mid-fifties during the excavations in the Temple of Athena on the acropolis (Haghios Ioannis hill), but the greatest number of fragments comes from the upper town and, particularly, from the Byzantine quarter between the Pretorio and the Apollo Pythios temple: here, the finding of a ceramic factory si…

Tidal Gravity Observations at Mt. Etna and Stromboli: results concerning the modeled and observed tidal factors

2006

Design of mobile phones for older adults : An empirical analysis of design guidelines and checklists for feature phones and smartphones

2017

Design guidelines and checklists are suggested as a useful tool in the development and evaluation of interface design of mobile phones for older adults. Given the intense evolution of mobile phone design, understanding how the design guidelines and checklists have taken into account the advances in mobile phone usability for older adults is important for their correct application and future development. Thus, this study explores the usability dimensions of mobile phone design for older adults and the related changes in terms of time and the type of device (feature phones vs. smartphones) based on an expert coding of the eight mobile phone design guidelines and checklists for older adults pu…

Branching Ratios and Spectral Functions of $\tau$ Decays: final ALEPH measurements and physics implications

2005

The full LEP-1 data set collected with the ALEPH detector at the $Z$ pole during 1991-1995 is analysed in order to measure the $\tau$ decay branching fractions. Extensive systematic studies are performed, in order to match the large statistics of the data sample corresponding to over 300 000 measured and identified $\tau$ decays. Branching fractions are obtained for the two leptonic channels and eleven hadronic channels defined by their respective numbers of charged particles and $\pi^0$'s. Using previously published ALEPH results on final states with charged and neutral kaons, corrections are applied to the hadronic channels to derive branching ratios for exclusive final states without kao…