نتایج جستجو برای: braincomputer interface

تعداد نتایج: 205771  

Hamideh Marefat Iman Sheydaii

Recent research in the area of Second Language Acquisition has proposed that bilinguals and L2 learners show syntactic indeterminacy when syntactic properties interface with other cognitive domains. Most of the research in this area has focused on the pragmatic use of syntactic properties while the investigation of compliance with a grammatical rule at syntax-related interfaces has not received...

2011
Li-Chen Shi Yang Li Rui-Hua Sun Bao-Liang Lu

Common spatial pattern (CSP) algorithm and principal component analysis (PCA) are two commonly used key techniques for EEG component selection and EEG feature extraction for EEG-based braincomputer interfaces (BCIs). However, both the ordinary CSP and PCA algorithms face a loading problem, i.e., their weights in linear combinations are non-zero. This problem makes a BCI system easy to be over-f...

2005
Le Song Evian Gordon Elly Gysels

Motor imagery attenuates EEG μ and β rhythms over sensorimotor cortices. These amplitude changes are most successfully captured by the method of Common Spatial Patterns (CSP) and widely used in braincomputer interfaces (BCI). BCI methods based on amplitude information, however, have not incoporated the rich phase dynamics in the EEG rhythm. This study reports on a BCI method based on phase sync...

Journal: :international journal of environmental research 0

the fringes areas interposed between metropolis and territorial ecosystems constitute a new sort of geography of urban sprawl. the difference between urban areas and their surroundings is at present unrecognisable.from this new context, that represent a new life environment for a large part of human population, new perceptive dynamics and new relationships emerge. various social manifestations ...

ژورنال: سلامت کار ایران 2008
ارقامی, شیرازه , تقدیسی, محمدحسین, حسن زاده رنگی, نرمین, خسروی, یحیی, فرشاد, علی اصغر, گوهری, محمودرضا,

  Background and aims   The HCS standard includes listing of chemicals, labeling of chemical  containers, preparation of material safety data sheets, writing plan and employee training  programs. The aim of this study was to determine the influence of implemented program to enhance the knowledge and safety performance level of employees.   Methods   The knowledge level and unsafe act ratio were...

Journal: :research in molecular medicine 0
nasrin amiri dash atan proteomics research center, tajrish, darband street, faculty of paramedical sciences, shahid beheshti university of medical sciences, tehran, iran reyhaneh farrokhi yekta proteomics research center, tajrish, darband street, faculty of paramedical sciences, shahid beheshti university of medical sciences, tehran, iran mehdi koushki tehran university of medical siences school of medicine

backgroud: protein-protein interaction, plays a key role in signal transduction in signaling pathways. different approaches are used for prediction of these interactions including experimental and computational approaches. in conventional node-edge protein-protein interaction networks, we can only see which proteins interact but ‘structural networks’ show us how these proteins interact which ca...

Journal: :journal of solid mechanics 0
r ghajar department of mechanical engineering, k.n. toosi university ,tehran, iran s peyman department of mechanical engineering, k.n. toosi university ,tehran, iran j sheikhi department of civil engineering ,razi university , kermanshah, iran m poorjamshidian department of mechanical engineering, kashan university ,kashan, iran

in this paper, the interface crack of two non-homogenous functionally graded materials is studied. subsequently, with employing the displacement method for fracture of mixed-mode stress intensity factors, the continuous variation of material properties are calculated. in this investigation, the displacements are derived with employing of the functional graded material programming and analysis o...

This paper contains a theoretical formulation of multiple interface cracks in two bonded dissimilar half planes subjected to in-plane traction. The distributed dislocation technique is used to construct integral equations for a dissimilar mediums weakened by several interface cracks. These equations are of Cauchy singular type at the location of dislocation, which are solved numerically to obta...

Journal: :journal of paramedical sciences 0
daryoush khoramian department of medical physics, faculty of medicine, tarbiat modares university, tehran, iran. soroush sistani department of medical physics, semnan university of medical sciences, semnan, iran.

primary and widely in use computed tomography (ct) dose descriptor is a volumetric ct dose index (ctdiv) that is usually measured by a pencil ionization chamber with active length of 100mm and polymethyl methacrylate (pmma) phantom. ctdiv depends on scan parameters such as mas, kv, collimation, tube rotation time but is independent of patient’s size and shape. for the purpose of a good estimati...

Journal: :international journal of iron & steel society of iran 2013
n. saeidi f. ashrafizadeh b. niroumand f. barlat

in the present research, damage mechanisms during room temperature uniaxial tensile testing of two different modern high strength dual phase steels,dp780 and dp980, were studied. detailed microstructural characterization of the strained and sectioned samples was performed by scanning electron microscopy (sem). the results revealed that interface decohesion, especially at the triple junctions of...

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