نتایج جستجو برای: واسط مغز کامپیوتر bci

تعداد نتایج: 15608  

2009
Minjin Ko Kyoungwoo Bae Gyuhwan Oh Taiyoung Ryu

Brain-Computer Interface (BCI) is a way to control computers by using human brain waves. As the technology has improved, BCI devices have become smaller and cheaper, making it possible for more individuals to buy them. This allows BCI to be applied to new fields outside of pure research, including entertainment. We examine whether BCI devices can be used as a new gaming device, approaching it f...

Journal: :NeuroImage 2010
Benjamin Blankertz Claudia Sannelli Sebastian Halder Eva M. Hammer Andrea Kübler Klaus-Robert Müller Gabriel Curio Thorsten Dickhaus

Brain-computer interfaces (BCIs) allow a user to control a computer application by brain activity as measured, e.g., by electroencephalography (EEG). After about 30years of BCI research, the success of control that is achieved by means of a BCI system still greatly varies between subjects. For about 20% of potential users the obtained accuracy does not reach the level criterion, meaning that BC...

Journal: :Journal of neural engineering 2013
Peng Yuan Xiaorong Gao Brendan Allison Yijun Wang Guangyu Bin Shangkai Gao

OBJECTIVE Today, the brain-computer interface (BCI) community lacks a standard method to evaluate an online BCI's performance. Even the most commonly used metric, the information transfer rate (ITR), is often reported differently, even incorrectly, in many papers, which is not conducive to BCI research. This paper aims to point out many of the existing problems and give some suggestions and met...

2013
Sonja C. Kleih Andrea Kübler

Motivation moderately influences brain-computer interface (BCI) performance in healthy subjects when monetary reward is used to manipulate extrinsic motivation. However, the motivation of severely paralyzed patients, who are potentially in need for BCI, could mainly be internal and thus, an intrinsic motivator may be more powerful. Also healthy subjects who participate in BCI studies could be i...

Journal: :Reports on Mathematical Logic 2008
Wojciech Buszkowski

We use a syntactic interpretation of MALL in BCI with ∧, defined in [5], to prove the undecidability of the consequence relations for BCI with ∧ and BCI with ∨, and the NP-completeness of BCI. Similar results are obtained for a variant of the Lambek calculus.

2009
Siamac Fazli Cristian Grozea Márton Danóczy Benjamin Blankertz Florin Popescu Klaus-Robert Müller

In the quest to make Brain Computer Interfacing (BCI) more usable, dry electrodes have emerged that get rid of the initial 30 minutes required for placing an electrode cap. Another time consuming step is the required individualized adaptation to the BCI user, which involves another 30 minutes calibration for assessing a subject’s brain signature. In this paper we aim to also remove this calibra...

Journal: :Studies in health technology and informatics 2009
Roberta Carabalona Paolo Castiglioni Furio Gramatica

A brain-computer interface (BCI) directly uses brain-activity signals to allow users to operate the environment without any muscular activation. Thanks to this feature, BCI systems can be employed not only as assistive devices, but also as neurorehabilitation tools in clinical settings. However, several critical issues need to be addressed before using BCI in neurorehabilitation, issues ranging...

2018
Regivan H.N. Santiago Benjamin Bedregal Joao Marcos Carlos Caleiro Jocivania Pinheiro

The notion of semi-BCI algebras is introduced and some of its properties are investigated. This algebra is another generalization for BCI-algebras. It arises from the “intervalization” of BCI algebras. Semi-BCI have a similar structure to Pseudo-BCI algebras however they are not the same. In this paper we also provide an investigation on the similarity between these classes of algebras by showi...

Journal: :The Journal of trauma 1992
Jess M Schultz Donald D Trunkey

In summary, the incidence of BCI following blunt thoracic trauma patients has been reported between 20% and 76%, and no gold standard exists to diagnose BCI. Diagnostic tests should be limited to identify those patients who are at risk of developing cardiac complications as a result of BCI. Therapeutic interventions should be directed to treat the complications of BCI. Finally, the prognosis an...

2013
Adrien Combaz Camille Chatelle Arne Robben Gertie Vanhoof Ann Goeleven Vincent Thijs Marc M. Van Hulle Steven Laureys

OBJECTIVES We study the applicability of a visual P3-based and a Steady State Visually Evoked Potentials (SSVEP)-based Brain-Computer Interfaces (BCIs) for mental text spelling on a cohort of patients with incomplete Locked-In Syndrome (LIS). METHODS Seven patients performed repeated sessions with each BCI. We assessed BCI performance, mental workload and overall satisfaction for both systems...

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