Search results for "ECoG"
showing 10 items of 3774 documents
An Efficient Network Log Anomaly Detection System Using Random Projection Dimensionality Reduction
2014
Network traffic is increasing all the time and network services are becoming more complex and vulnerable. To protect these networks, intrusion detection systems are used. Signature-based intrusion detection cannot find previously unknown attacks, which is why anomaly detection is needed. However, many new systems are slow and complicated. We propose a log anomaly detection framework which aims to facilitate quick anomaly detection and also provide visualizations of the network traffic structure. The system preprocesses network logs into a numerical data matrix, reduces the dimensionality of this matrix using random projection and uses Mahalanobis distance to find outliers and calculate an a…
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.
Opettajat lukivaikeusriskin tunnistajina koulupolun alussa
2019
It’s Not Only What You Say, But How You Say It : Investigating the Potential of Prosodic Analysis as a Method to Study Teacher’s Talk
2018
In this study, we introduce new insights into prosodic analyses as an emerging method to study what happens in classrooms interactions. We claim that the prosodic aspects (features of speech such as intonation, volume and pace) of talk are important, but under-represented in the learning sciences. These prosodic aspects may be used to complement, intensify or even reverse the linguistic content of speech. Thus far, most research on classrooms has focused on the content (what is said) rather than on understanding the meaning of the prosodic features (how it is said) of talk. In this study, we introduce prosodic analyses as a method to study classroom discussions. Our exploratory experiment f…
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…
Validation of a Questionnaire on Work and Learning Habits for Future Professionals: Exploring Personal Learning Environments
2016
Este artículo describe el proceso completo de validación del instrumento de recogida de información del proyecto CAPPLE. La validación del instrumento –un cuestionario online- pretende garantizar la fiabilidad, validez, pertinencia y la funcionalidad del proceso de recogida. Se ha optado por un método de validación basado en tres procedimientos sucesivos y complementarios: 1) un juicio de expertos realizado por 8 profesionales en tres rondas consecutivas; 2) una ronda de entrevistas cognitivas a 24 sujetos con 10 ítems cruciales; y 3) una prueba piloto con una muestra invitada de 400 sujetos, de los que 224 se consideran muestra productora de datos. Tras la realización de los tres procedimi…
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…