International Conference on Physiological Computing Systems最新文献_第8页

Towards Bidirectional Brain-computer Interfaces that Use fNIRS and tDCS 基于fNIRS和tDCS的双向脑机接口研究

International Conference on Physiological Computing Systems Pub Date : 1900-01-01 DOI: 10.5220/0006380500570064

Samuel W. Hincks, Maya DeBellis, Eun Youb Lee, R. T. Brink, Birger Moëll, R. Jacob

{"title":"Towards Bidirectional Brain-computer Interfaces that Use fNIRS and tDCS","authors":"Samuel W. Hincks, Maya DeBellis, Eun Youb Lee, R. T. Brink, Birger Moëll, R. Jacob","doi":"10.5220/0006380500570064","DOIUrl":"https://doi.org/10.5220/0006380500570064","url":null,"abstract":"We envision a future user interface that measures its user’s mental state and responds not only through a display but also by sending output directly to the brain, leading to a primitive bidirectional brain-computer interface. Previous interactive systems have measured brain state with functional near-infrared spectroscopy (fNIRS) for communication from user to computer; we now explore transcranial direct-current stimulation (tDCS) as a channel in the opposite direction. Our goal is to integrate this with brain measurements from fNIRS, so that the stimulation parameters governing tDCS may be set dynamically to enhance user cognition based on current mental state and task demands. To do this, the first step is to determine how long it takes for tDCS to register cognitive effects and how long these effects last. We present an experiment that investigates the temporal dimension of tDCS for this purpose. The findings suggest a long lag-time between the onset of stimulation and any measurable cognitive effect, which may prohibit the effectiveness of tDCS in a brainadaptive application.","PeriodicalId":326453,"journal":{"name":"International Conference on Physiological Computing Systems","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124327215","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

ERP-based Speller with a New Paradigm 基于erp的新范式拼写器

International Conference on Physiological Computing Systems Pub Date : 1900-01-01 DOI: 10.5220/0004834203410346

J. Sohn, Mi-Sook Park, Hye-Ryeon Yang, Young-Ji Eum, J. Eom

{"title":"ERP-based Speller with a New Paradigm","authors":"J. Sohn, Mi-Sook Park, Hye-Ryeon Yang, Young-Ji Eum, J. Eom","doi":"10.5220/0004834203410346","DOIUrl":"https://doi.org/10.5220/0004834203410346","url":null,"abstract":"In most implementation of an ERP-based speller, standard row-column paradigm (RCP) was used. However, RCP is susceptible to adjacency-distraction errors because items in the same row or column of the target flash at the time of a half when the target item flashes. The adjacency-distraction errors could be reduced if the number of flanking items that flash with the target is diminished. This study presents a novel P300-based stimulus presentation called row-column-diagonal paradigm (RCDP) where characters on the main diagonal and the anti-diagonal in the matrix flash in addition to characters on the row and columns. In RCDP, items in the same row, column, main diagonal, and anti-diagonal of the target flashes at the time of a quarter when the target item flashes. Using a 6×6 matrix of alphanumeric characters and keyboard commands, ten college students used RCP and RCDP. Stepwise linear discriminant analysis (SWLDA) for the EEG signals recorded in calibration phases was used to calculate discrimininant function. By applying the discrimininant function to electroencephalography (EEG) signal recorded in the test phase, the probability whether the item was the target or not was evaluated. Average accuracy was 76.6% in RCP while 84.0% in RCDP. With RCP, most errors were occurred in the same row or column of the target; on the other hand, with RCDP in the same row, column, main diagonal, or anti-diagonal of the target. These findings indicate how RCDP reduces adjacency-distraction errors and might be able to contribute to develop more advanced stimulus presentation paradigm.","PeriodicalId":326453,"journal":{"name":"International Conference on Physiological Computing Systems","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128649970","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Clinical Risk Groups Analysis for Chronic Hypertensive Patients in Terms of ICD9-CM Diagnosis Codes 基于ICD9-CM诊断码的慢性高血压患者临床危险人群分析

International Conference on Physiological Computing Systems Pub Date : 1900-01-01 DOI: 10.5220/0006218700130022

J. Fernández-Sánchez, C. Soguero-Ruíz, Pablo de Miguel-Bohoyo, F. Rivas-Flores, Ángel Gómez-Delgado, Francisco Javier Gutiérrez-Expósito, I. Mora-Jiménez

{"title":"Clinical Risk Groups Analysis for Chronic Hypertensive Patients in Terms of ICD9-CM Diagnosis Codes","authors":"J. Fernández-Sánchez, C. Soguero-Ruíz, Pablo de Miguel-Bohoyo, F. Rivas-Flores, Ángel Gómez-Delgado, Francisco Javier Gutiérrez-Expósito, I. Mora-Jiménez","doi":"10.5220/0006218700130022","DOIUrl":"https://doi.org/10.5220/0006218700130022","url":null,"abstract":"Hypertension is a chronic condition that has a considerable prevalence in the elderly. Furthermore, hypertensive patients double cost of normotensive individuals. The budget reduction and the increasing concern about the sustainability of the healthcare system have caused that improving the efficiency and use of resources are a priority in developed countries. Identification of chronic hypertensive patients, i.e., patients with high blood pressure, can be performed by means of population classification systems such as Clinical Risk Groups (CRGs). CRGs classify individuals in health status categories taking both demographic and clinical information of the encounters that individuals have with the healthcare system during a defined period of time. In this work, we determine the characteristic profile and the evolution of diagnosis codes according to the International Classification of Diseases 9th revision, Clinical Modification (ICD9-CM), focusing on healthy and chronic hypertensive patients at different chronic statuses (CRG). Our data correspond to the population associated to the University Hospital of Fuenlabrada (Madrid, Spain) during the year 2012, providing about 46000/16000 healthy/hypertensive individuals. We found that profiles associated to different health statuses have different patterns in terms of ICD-9 diagnosis codes. Furthermore, a prediction method is proposed to determine the health status of a new patient according to demographic (age and gender) and clinical (diagnosis codes) data. We conclude that gender is the less informative characteristic, though the combination of age and diagnosis codes have a great potential when they are non linearly combined.","PeriodicalId":326453,"journal":{"name":"International Conference on Physiological Computing Systems","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128046646","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

Developing Personas based on Physiological Measures 基于生理测量发展人物角色

International Conference on Physiological Computing Systems Pub Date : 1900-01-01 DOI: 10.5220/0006963201310136

Vanessa Georges, F. Courtemanche, M. Fredette, Pierre-Majorique Léger, S. Sénécal

引用次数: 1

Flow Neurophysiology in Knowledge Work: Electroencephalographic Observations from Two Cognitive Tasks 知识工作中的流动神经生理学:两种认知任务的脑电图观察

International Conference on Physiological Computing Systems Pub Date : 1900-01-01 DOI: 10.5220/0006926700420053

M. T. Knierim, Mario Nadj, Anuja Hariharan, Christof Weinhardt

引用次数: 3

A Hierarchical BCI System Able to Discriminate between Non Intentional Control State and Four Intentional Control Activities 一种能够区分非有意控制状态和四种有意控制活动的分层BCI系统

International Conference on Physiological Computing Systems Pub Date : 1900-01-01 DOI: 10.5220/0004723000910097

J. Abascal, Andoni Arruti, J. Martín, J. Muguerza

引用次数: 2

Seven Principles to Mine Flexible Behavior from Physiological Signals for Effective Emotion Recognition and Description in Affective Interactions 从生理信号中挖掘灵活行为以有效识别和描述情感互动的七项原则

International Conference on Physiological Computing Systems Pub Date : 1900-01-01 DOI: 10.5220/0004666400750082

Rui Henriques, Ana Paiva

引用次数: 4

Exploring the Feasibility and Performance of One-step Three-factor Authentication with Ear-EEG 耳-脑电一步三因素认证的可行性及性能探讨

International Conference on Physiological Computing Systems Pub Date : 1900-01-01 DOI: 10.5220/0006896300300041

Max T. Curran, Nick Merrill, Swapan Gandhi, J. Chuang

{"title":"Exploring the Feasibility and Performance of One-step Three-factor Authentication with Ear-EEG","authors":"Max T. Curran, Nick Merrill, Swapan Gandhi, J. Chuang","doi":"10.5220/0006896300300041","DOIUrl":"https://doi.org/10.5220/0006896300300041","url":null,"abstract":"Multi-factor authentication presents a robust method to secure our private information, but typically requires multiple actions by the user resulting in a high cost to usability and limiting adoption. A usable system should also be unobtrusive and inconspicuous. We present and discuss a system with the potential to engage all three factors of authentication (inherence, knowledge, and possession) in a single step using an earpiece that implements brain-based authentication using electroencephalography (EEG). We demonstrate its potential by collecting EEG data using manufactured custom-fit earpieces with embedded electrodes and testing a variety of authentication scenarios. Across all participants’ best-performing “passthoughts”, we are able to achieve 0% false acceptance and 0.36% false rejection rates, for an overall accuracy of 99.82%, using one earpiece with three electrodes. Furthermore, we find no successful attempts simulating impersonation attacks. We also report on perspectives from our participants. Our results suggest that a relatively inexpensive system using a single electrode-laden earpiece could provide a discreet, convenient, and robust method for one-step multi-factor authentication.","PeriodicalId":326453,"journal":{"name":"International Conference on Physiological Computing Systems","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116456620","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Hardware/Software Platform to Acquire Bioelectrical Signals. A Case Study: Characterizing Computer Access through Attention 采集生物电信号的硬件/软件平台。一个案例研究:通过注意力表征计算机访问

International Conference on Physiological Computing Systems Pub Date : 1900-01-01 DOI: 10.5220/0006412200760083

A. Molina, I. Gómez, Jaime Guerrero, M. Monge, J. A. Castro-García, R. Quesada, Santiago Berrazueta, M. Hermoso-de-Mendoza

{"title":"A Hardware/Software Platform to Acquire Bioelectrical Signals. A Case Study: Characterizing Computer Access through Attention","authors":"A. Molina, I. Gómez, Jaime Guerrero, M. Monge, J. A. Castro-García, R. Quesada, Santiago Berrazueta, M. Hermoso-de-Mendoza","doi":"10.5220/0006412200760083","DOIUrl":"https://doi.org/10.5220/0006412200760083","url":null,"abstract":"This paper describes a hardware/software platform to acquire human body signals. In the field of physiological computing it is desirable to have a system that allows the synchronized acquisition of signals coming from different sources. Here is described how to unify the whole process of acquiring signals from both customized hardware and low cost commercial devices such as Neurosky’s mindwave. A case study using this platform is also shown: studying the feasibility of using sustained attention to access a computer. In order to do that brain activity was measured using Neurosky’s mindwave. The participants in this study were asked to keep their attention high/low for as long as possible during several trials. Experimentation was performed by 7 normally developed subjects and 3 people with cerebral palsy (CP). Our preliminary work shows that 60% of participants might be potential users of this technology. Eventually, modulating the attention to access a communication board needs a scanning period greater than 5.76s.","PeriodicalId":326453,"journal":{"name":"International Conference on Physiological Computing Systems","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126945045","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Promoting Visual Biofeedback through a Medical Device for Physical Therapy and Physical and Rehabilitative Medicine 通过物理治疗和物理康复医学的医疗设备促进视觉生物反馈

International Conference on Physiological Computing Systems Pub Date : 1900-01-01 DOI: 10.5220/0004697002930298

C. Alcobia, Rui Costa, Luis Ferreira, Pedro Mendes

引用次数: 0