Search results for " Time"
showing 10 items of 3005 documents
FLUMO: FLexible Underwater MOdem
2019
The last years have seen a growing interest in underwater acoustic communications because of its applications in marine research, oceanography, marine commercial operations, the offshore oil industry and defense. High-speed communication in the underwater acoustic channel has been challenging because of limited bandwidth, extended multipath, refractive properties of the medium, severe fading, rapid time variation and large Doppler shifts. In this paper, we show an implementation of a flexible Software-Defined Acoustic (SDA) underwater modem, where modulation parameters are completely tunable to optimize performance. In particular, we develop the system architecture following two key ideas. …
Changes in students’ understanding of and visual attention on digitally represented graphs across two domains in higher education : a postreplication…
2020
Domain-specific understanding of digitally represented graphs is necessary for successful learning within and across domains in higher education. Two recent studies conducted a cross-sectional analysis of graph understanding in different contexts (physics and finance), task concepts, and question types among students of physics, psychology, and economics. However, neither changes in graph processing nor changes in test scores over the course of one semester have been sufficiently researched so far. This eye-tracking replication study with a pretest–posttest design examines and contrasts changes in physics and economics students’ understanding of linear physics and finance graphs. It analyze…
Neljäkymmentä plus : erään ikäluokan selviytymistarina
2003
The orthodox liturgical year and its theological structure
2022
The concept of ‘liturgical year’ indicates a reference to the meaning of the measuring units of civil time, and especially to the cosmic entities that determine the general rhythm of time – the sun and the moon. Interestingly, the liturgical time depends both on the structure of civil time, and, on the two discrete systems of the solar and lunar cycles, which have always been underpinnings of time measuring. The special importance and influence that the cosmical rhythms exert on the entire human life are also felt in the structure and theology of the liturgical time, where it signals the attempt to merge and reconcile the cosmical solar and lunar cycles within the liturgical year. This lead…
Tail Removal Block Validation: Implementation and Analysis
2018
In this paper a solution for the removal of long tail blocktimes in a proof-of-work blockchain is proposed, implemented and analysed. Results from the mainnet of the Bismuth blockchain demonstrate that the variances in the key variables, difficulty level and blocktime, were approximately halved after the tail removal code was enabled. Low variances in difficulty and blocktimes are desirable for timely execution of transactions in the network as well as reduction of unwanted oscillations in the feedback control problem.
Tyytyväisyys työaikapankkiin
2009
Tutkimuksessa tarkasteltiin työaikapankkiin tyytyväisyyttä ennustavia tekijöitä. Tutkimus perustuu yhdeksässä työorganisaatiossa tehdyn kyselyn aineistoon (N = 268). Analyysit suoritettiin polkuanalyysina, jolloin selittäjien kausaalinen järjestys ja keskinäinen riippuvuus pystyttiin ottamaan huomioon. Selvä enemmistö vastaajista oli tyytyväisiä työaikapankkiin. Tyytyväisyyttä lisäsivät mahdollisuus kokonaisen vapaa-päivän viettämiseen säästetyistä tunneista, korkea asema organisaatiossa sekä työntekijöiden organisaation johdolta saama tuki. Tyytyväisyyttä heikensivät ongelmat säästettyjen vapaiden käytössä sekä työaikatilin saldorajojen huono mitoitus suhteessa työtehtävien vaativuuteen. K…
Physical properties of aerosol particles measured from a bubbling fluidized bed boiler
2015
Abstract Increased use of biomass and waste fuels, and the consequent corrosion problem have led to an increased need to study and monitor the combustion processes. This study presents an extensive physical characterization of aerosol particles measured from a bubbling fluidized bed boiler with different fuel mixtures and optional ferric sulfate feeding. The fuel mixtures included bark, sludge, peat and solid recovered fuel. Previously, the characterization of the particles analyzed from a fluidized bed reactor has mainly focused on chemical off-line analysis of collected impactor samples, large coarse mode particles or laboratory-scale reactors. In this study, the focus is in the particle …
A Design-Oriented Analysis of Multimodality in English as a Foreign Language
2018
This empirical article investigates multimodality in English as a foreign language, both as seen in the use of multimodal texts as artefacts and pedagogical texts for learning, and through an analysis of the multimodal learning designs. We present observations from a year 10 classroom in Norway that worked with the novel The Absolutely True Diary of a Part-Time Indian (Alexie, 2007). We explore a four-week teaching sequence, asking how different modes were involved when the educator designed literacy events around the novel, and how multimodality is present in the students’ meaning making. Our aim is to make explicit and discuss some of the silent literacy practices in English teaching at l…
On a Fractional in Time Nonlinear Schrödinger Equation with Dispersion Parameter and Absorption Coefficient
2020
This paper is concerned with the nonexistence of global solutions to fractional in time nonlinear Schrö
Estimating finite mixtures of semi-Markov chains: an application to the segmentation of temporal sensory data
2019
Summary In food science, it is of great interest to obtain information about the temporal perception of aliments to create new products, to modify existing products or more generally to understand the mechanisms of perception. Temporal dominance of sensations is a technique to measure temporal perception which consists in choosing sequentially attributes describing a food product over tasting. This work introduces new statistical models based on finite mixtures of semi-Markov chains to describe data collected with the temporal dominance of sensations protocol, allowing different temporal perceptions for a same product within a population. The identifiability of the parameters of such mixtur…