Search results for "PROs"

Designing a graphics processing unit accelerated petaflop capable lattice Boltzmann solver: Read aligned data layouts and asynchronous communication

2016

The lattice Boltzmann method is a well-established numerical approach for complex fluid flow simulations. Recently, general-purpose graphics processing units (GPUs) have become available as high-performance computing resources at large scale. We report on designing and implementing a lattice Boltzmann solver for multi-GPU systems that achieves 1.79 PFLOPS performance on 16,384 GPUs. To achieve this performance, we introduce a GPU compatible version of the so-called bundle data layout and eliminate the halo sites in order to improve data access alignment. Furthermore, we make use of the possibility to overlap data transfer between the host central processing unit and the device GPU with com…

Regularity for nonlinear stochastic games

2015

We establish regularity for functions satisfying a dynamic programming equation, which may arise for example from stochastic games or discretization schemes. Our results can also be utilized in obtaining regularity and existence results for the corresponding partial differential equations. peerReviewed

Visual occlusion as tool to assess attentional demand and spare capacity

2021

Event-related potentials to task-irrelevant changes in facial expressions

2009

Abstract Background Numerous previous experiments have used oddball paradigm to study change detection. This paradigm is applied here to study change detection of facial expressions in a context which demands abstraction of the emotional expression-related facial features among other changing facial features. Methods Event-related potentials (ERPs) were recorded in adult humans engaged in a demanding auditory task. In an oddball paradigm, repeated pictures of faces with a neutral expression ('standard', p = .9) were rarely replaced by pictures with a fearful ('fearful deviant', p = .05) or happy ('happy deviant', p = .05) expression. Importantly, facial identities changed from picture to pi…

Long-term physical activity modifies automatic visual processing

2019

Electrophysiologically registered visual mismatch negativity (vMMN) is known to represent automatic visual processing in human visual cortex. Since physical activity (PA) is generally beneficial to cerebrovascular function, we wanted to find out if automatic visual processing is affected by PA. We investigated the connection between long-term leisure-time PA and precognitive visual processing in 32 healthy young males. Participants were divided into active (n = 16) and inactive (n = 16) group according to their leisure-time PA records from the past three years. vMMN was recorded with electroencephalogram using passive oddball paradigm with visual bars. Standard (90%) and deviant (10%) stimu…

Sustained attention required for effective dimension-based retro-cue benefit in visual working memory

2023

In visual working memory (VWM) tasks, participants’ performances can be improved through the use of dimension-based retro-cues, which direct internal attention to prioritize a particular dimension (e.g., color or orientation) of VWM representations even after the stimuli disappear. This phenomenon is known as the dimension-based retro-cue benefit (RCB). The present study investigates whether sustained attention is required for the dimension-based RCB by inserting interference or interruption between the retro-cue and the test array to distract attention. We tested the effects of perceptual interference or cognitive interruption on dimension-based RCB when the interference (Experiments 1 and…

视觉工作记忆存储的表征单位 [The Representation Unit of Visual Working Memory]

2022

The visual working memory is a limited storage system in which people could flexibly process the representations to complete the task. Among studies on the capacity of visual working memory, the representation unit is a prior subject. Previous research employs the change-detection paradigm and the recall paradigm to explore the nature of representations when features of diverse dimensions and different-level features of the same dimension are stored in the visual working memory. These studies elicit two binary hypotheses: the object-based representation hypothesis backs that those diverse features are bound on the object and form a whole, while the feature-based representation hypothesis su…

Prospektiteoria, realisoimattomat voitot ja momentum suomalaisessa aineistossa

2017

Tässä tutkielmassa tarkastellaan Grinblattin ja Hanin (2005) mukaisesti realisoimatto-mia voittoja tulevien tuottojen selittäjänä. Tämä aiheuttaa tutkijoiden julkaisussa Fama-MacBeth -regressiolla Yhdysvaltojen pörsseissä aggregaattitasolla havaittavan momentumin kaltaisen ilmiön, kun prospektiteorian ja mentaalilaskennan mukaisesti osa sijoittajista alireagoi fundamenttihintojen muutokseen aiheuttaen hintojen ennus-tettavuutta. Momentum havaitaan sekä Jegadeeshin ja Titmanin (1993) mukaisten menneiden tuottojen että realisoimattomien voittojen avulla, joista realisoimattomat voitot toimivat huomattavasti parempana selittäjänä saaden tilastollisesti merkitse-vämmän ja arvoltaan suuremman ke…

VIOLENZA DI PROSSIMITÀ. CURA PASTORALE E VULNERABILITÀ SOCIALE

2022

Nel capitolo introduttivo vendono spiegate le ragioni scientifiche che collegano il paradigma della violenza di prossimità alle rappresentazioni culturali che orientano comportamenti proattivi e, allo stesso tempo, alle dinamiche relazionali che marginalizzano i soggetti più vulnerabili.

The impact of children’s socioemotional development on parenting styles: the moderating effect of social withdrawal

2020

This study focused on associations between children’s socioemotional development (prosocial behaviour, internalizing and externalizing problems) and parenting styles (affection, behavioural control, and psychological control), and the moderating role of children’s social withdrawal (as a temperamental characteristic) in these associations. Children’s socioemotional development (n = 314) were rated by teachers at three-time points (grades 1–3). Parents completed questionnaires measuring their parenting styles at the same three-time points. The level of social withdrawal was obtained at the end of kindergarten from teachers’ reports. Panel analysis showed that prosocial behaviour was associat…