Search results for " ERP"

A wavelet Methodology for EEG Time-frequency Analysis in a Time Discrimination Task

2009

EEG signals recorded by surface electrodes placed on the scalp can be thought as non- stationary stochastic processes in both time and space, especially in response to external stimuli. Cognitive tasks, in particular, are reflected by changes in EEG dynamics concerning both rhythms energy and connectivity across different brain regions. In the frequency-domain, EEG analysis is complicated and time-frequency methodologies are needed. The Wavelet Transform, in particular, represents a powerful tool for analysing, within a time-frequency embedding, the EEG. In this study we applied a wavelet-based methodology to extract quantitative time-frequency parameters from EEG signals recorded during a …

How salience enhances inhibitory control : An analysis of electro-cortical mechanisms

2023

Stop-signal tasks (SSTs) combined with human electro-cortical recordings (Event-Related Potentials, ERPs) have revealed mechanisms associated with successful stopping (relative to failed), presumably contributing to inhibitory control. The corresponding ERP signatures have been labeled stop N1 (+/- 100-ms latency), stop N2 (200 ms), and stop P3 (160–250 ms), and argued to reflect more sensory-specific (N1) versus more generic (N2, P3) mechanisms. However, stop N1 and stop N2, as well as latencies of stop-P3, appear to be quite inconsistent across studies. The present work addressed the possible influence of stop-signal salience, expecting high salience to induce clear stop N1s but reduced s…

Mapping symbols to sounds: electrophysiological correlates of the impaired reading process in dyslexia

2012

Dyslexic and control first-grade school children were compared in a Symbol-to-Sound matching test based on a non-linguistic audiovisual training which is known to have a remediating effect on dyslexia. Visual symbol patterns had to be matched with predicted sound patterns. Sounds incongruent with the corresponding visual symbol (thus not matching the prediction) elicited the N2b and P3a event-related potential (ERP) components relative to congruent sounds in control children. Their ERPs resembled the ERP effects previously reported for healthy adults with this paradigm. In dyslexic children, N2b onset latency was delayed and its amplitude significantly reduced over left hemisphere whereas P…

Pilvipohjaisten ERP -järjestelmien omaksumiseen vaikuttavia erikoispiirteitä

2016

Tämä pro gradu -tutkielma käsittelee pilvipohjaisten ERP -järjestelmien omaksumiseen liittyviä erikoispiirteitä. Pilvipohjaiset ERP -järjestelmät ovat osa 1960-luvulta alkanutta toiminnanohjausjärjestelmien luonnollista kehityskulkua. Viimeisen vuosikymmenen aikana nopeutuneet internetyhteydet ja muu internetpohjainen informaatioteknologia ovat synnyttänyt ilmiön, josta käytetään yleisesti termiä pilvilaskenta. Pilvilaskenta ja siihen liittyvät pilvipalvelut ovat esimerkki käynnissä olevasta digitalisaatiosta. Tutkielmassa esitetään tieteelliseen kirjallisuuteen sekä empiiriseen tutkimusaineistoon perustuen ERP -järjestelmien ja pilvilaskennan yhdistyessä syntyneiden pilvipohjaisen ERP -jär…

SAP konfigurēšanas iespēju izmantošana uzņēmuma biznesa procesu atbalstam

2016

Jebkuras organizācijas darbība balstās uz vairāk vai mazāk strukturētiem procesiem, jo neviens nemēģina sasniegt iecerētos rezultātus, katru reizi izmantojot citus līdzekļus, bet gan izmanto jau pārbaudītas pieejas. Un ja organizācija nodarbojas ar biznesa procesu realizēšanu SAP sistēmā, tad katram biznesa procesam ir nepieciešama iestatījumu konfigurācija sistēmā. Darbā tiek aplūkota SAP sistēmas konfigurēšana, lai to pielāgotu organizācijas biznesa procesiem un no tās izejošas problēmas ar iespēju tos atrisināt.

Neural correlates of prospective memory: a comparison between a time-based and an event-based task

2011

Does predictability matter? Effects of cue predictability on neurocognitive mechanisms underlying prospective memory

2015

Prospective memory (PM) represents the ability to successfully realize intentions when the appropriate moment or cue occurs. In this study, we used event-related potentials (ERPs) to explore the impact of cue predictability on the cognitive and neural mechanisms supporting PM. Participants performed an ongoing task and, simultaneously, had to remember to execute a pre-specified action when they encountered the PM cues. The occurrence of the PM cues was predictable (being signalled by a warning cue) for some participants and was completely unpredictable for others. In the predictable cue condition, the behavioural and ERP correlates of strategic monitoring were observed mainly in the ongoing…

Efficacy of the cloud computing technology in the management of communications and business processes of the companies

2016

W artykule zbadano tendencje rozwoju i stosowania różnych klas systemów informatycznych w zarządzaniu w relacji do rodzajów procesów biznesowych. Zaprezentowano krótki przegląd aktualnego stanu wykorzystania technologii chmury obliczeniowej na świecie i na Ukrainie. Korzyści wynikające z zastosowania modelu "SaaS - Software as a Service" zostały wyjaśnione na przykładzie innowacji międzynarodowego projektu "Bitrix 24", w którym zrealizowane zostały główne cele systemów CRM w połączeniu z szerokimi możliwościami koordynacji procesów komunikacyjnych i biznesowych nowoczesnych firm. Projekt ten został przetłumaczony na większość języków europejskich i wykorzystuje narzędzia społecznego środowi…