Search results for " recognition"
showing 10 items of 3220 documents
The challenges of analysing blood stains with hyperspectral imaging
2014
Hyperspectral imaging is a potential noninvasive technology for detecting, separating and identifying various substances. In the forensic and military medicine and other CBRNE related use it could be a potential method for analyzing blood and for scanning other human based fluids. For example, it would be valuable to easily detect whether some traces of blood are from one or more persons or if there are some irrelevant substances or anomalies in the blood. This article represents an experiment of separating four persons' blood stains on a white cotton fabric with a SWIR hyperspectral camera and FT-NIR spectrometer. Each tested sample includes standardized 75 _l of 100 % blood. The results s…
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…
Curvelet-based method for orientation estimation of particles
2013
A method based on the curvelet transform is introduced for estimating from two-dimensional images the orientation distribution of small anisotropic particles. Orientation of fibers in paper is considered as a particular application of the method. Theoretical aspects of the suitability of this method are discussed and its efficiency is demonstrated with simulated and real images of fibrous systems. Comparison is made with two traditionally used methods of orientation analysis, and the new curvelet-based method is shown to perform clearly better than these traditional methods.
The use of phonemic transcriptions as a teaching method and its effects on language learning outcomes
2009
Kirjaimet ainoastaan kuvaavat kieltä. Äänteet ovat se, mitä todella kuulemme. Virheelliset ääntämistottumukset jättävät aivoihin harhaanjohtavia muistijälkiä ja edistävät näin väärinymmärrysten syntymistä. Tämä puolestaan voi johtaa siihen, että henkilö pidättäytyy puhumasta vierasta kieltä, minkä seurauksena on edistymisen hidastuminen. Oheisen tutkimuksen tarkoituksena on selvittää, voisiko foneettisen tarkekirjoituksen käytöllä opetusmenetelmänä olla myönteisiä vaikutuksia oppimistuloksiin. Tutkielmassa tarkastellaan oikeiden ääntämistottumusten roolia kieltenopiskelussa. Siinä luodaan myös katsaus aikaisempiin kokemuksin foneettisen tarkekirjoituksen pedagogisesta käytöstä. Lopuksi esi…
Performance of Lead-Acid Batteries with Nanostructured Electrodes at Different Temperature
2018
In this work we present innovative lead-acid batteries with nanostructured electrodes, which are cycled in a wide range of temperatures typically of lead-acid commercial batteries (EN 61427-1: 2013). In comparison to parameters usually used to commercial batteries, much more stressful conditions in terms of cut-off, charge/discharge rate and discharge were imposed.
On the Choice of the Extracellular Vesicles for Therapeutic Purposes
2019
Extracellular vesicles (EVs) are lipid membrane vesicles released by all human cells and are widely recognized to be involved in many cellular processes, both in physiological and pathological conditions. They are mediators of cell-cell communication, at both paracrine and systemic levels, and therefore they are active players in cell differentiation, tissue homeostasis, and organ remodeling. Due to their ability to serve as a cargo for proteins, lipids, and nucleic acids, which often reflects the cellular source, they should be considered the future of the natural nanodelivery of bio-compounds. To date, natural nanovesicles, such as exosomes, have been shown to represent a source of diseas…
Second and foreign language fluency from a cognitive perspective : inefficiency and control of attention in lexical access
2017
The present dissertation focuses on the fluency of second and foreign language (L2). Second and foreign language use is often assessed by its fluency. However, the connections between language proficiency and fluency are far from clear. The fluency reasearch has tried to establish these connections, but results are varied. In the current thesis, this question is explored within the theoretical framework of Norman Segalowitz’s division of three types of fluency: cognitive, utterance, and perceived fluency. The overall proposition here is that in relation to L2 proficiency, cognitive fluency provides important insights. This is based on the theories of limited cognitive resources, which state…
Prosody and fluency of Finland Swedish as a second language: Investigating global parameters for automated speaking assessment
2023
This study investigates prosody and fluency of Finland Swedish as a second language (L2). The main objective is to investigate global measures of prosody and fluency as predictors of overall oral proficiency, fluency, and pronunciation ratings. We analyzed parameters related to temporal fluency, timing (based on syllable durations), and f0 change from spontaneous speech produced by 30 native and 235 non-native speakers of Finland Swedish representing proficiency levels from beginner to intermediate. We used pairwise comparisons to investigate the differences between native speech (L1) and L2 samples from different proficiency levels. To study the predictability of ratings with acoustic para…
Tune recognition from melody, rhythm and harmony
2009
Earlier studies have shown that listeners recognise familiar tunes. With tunes that are manipulated in some way, melody has been shown to be more important for recognition than rhythm. The present study examined the importance of melody, rhythm and harmony for tune recognition by listeners with varying musical expertise. Forty-six participants, divided into three groups according to their musical expertise, heard the first two phrases of familiar tunes in four different versions: melody, rhythm, melody with harmony and rhythm with harmony. The participants were asked to identify the tunes. A two-factor ANOVA was conducted with the four versions of presentation and the three groups of partic…
Hydro-mechanical modelling of a natural slope affected by a multiple slip surface failure mechanism
2009
A coupled hydro-mechanical formulation is presented for the analysis of landslide motion during crisis episodes. The mathematical formulation is used to model a natural slope affected by a multiple slip surface failure mechanism, in which pore water pressure evolution was identified as the main cause for movement accelerations. An elasto-plastic constitutive model is adopted for the behaviour of slip surfaces. Material parameters are obtained by combining the available laboratory tests and the back analysis of some crisis episodes. After being calibrated and validated, the model is applied to improve the understanding of the physical processes involved and to predict the landslide behaviour…