A Suitable Approach in Extracting Brain Source Signals from Disabled Patients

2015 ◽  
pp. 721-731
Author(s):  
Solomon Gotham ◽  
G. Sasibushana Rao
Keyword(s):  
Disabled Patients ◽  
Source Signals

Implementation of a single-channel active noise control system with multiple reference sensors

2020 ◽  
Vol 68 (5) ◽  
pp. 358-366
Author(s):  
H.E. Oh ◽  
W.B. Jeong ◽  
C. Hong
Keyword(s):  
Single Channel ◽  
Control Method ◽  
Reference Signal ◽  
Active Noise Control ◽  
Multiple Source ◽  
Weighted Sum ◽  
Reference Signals ◽  
Feedforward Controller ◽  
Channel Control ◽  
Source Signals

When multiple sources contribute competitively to the noise level, multi-channel control architecture is needed, leading to more cost and time for control computation. We, hence, are concerned with a single-channel control method with a single-reference signal obtained from a linear combination of the multiple source signals. First, we selected 3 source signal sensors for the reference signals and the error sensor, selected a proper actuator and designed the controllers: 3 cases of single-channel feedforward controllers with a single-reference signal respectively from the source signals, a multi-channel feedforward controller with the reference signals from the source signals, and the proposed controller with the reference signal from weighted sum of the source signals. The weighting factors and the filter coefficients of the controller were determined by the FxLMS algorithm. An experiment was then performed to confirm the effectiveness of the proposed method comparing the control performance with other methods for a tower air conditioner. The overall sound pressure level (SPL) detected by the error sensor is compared to evaluate their performance. The reduction in the overall SPL was obtained by 4.74 dB, 1.96 dB and 6.62 dB, respectively, when using each of the 3 reference signals. Also, the overall SPL was reduced by 7.12 dB when using the multi-reference controller and by 7.66 dB when using the proposed controller. Conclusively, under the multiple source contribution, a single-channel feed forward controller with the reference signal from a weighted sum of the source signals works well with lower cost than multi-channel feedforward controller.

Blind Deconvolution to Improve Classification of Transient Source Signals in Multipath

2000 ◽  
Author(s):  
Lisa A. Pflug ◽  
George B. Smith ◽  
Michael K. Broadhead
Keyword(s):  
Blind Deconvolution ◽  
Transient Source ◽  
Source Signals

scholarly journals Choice, quality and patients’ experience: evidence from a Finnish physiotherapy service

2021 ◽  
Author(s):  
Visa Pitkänen ◽  
Ismo Linnosmaa
Keyword(s):  
Positive Relationship ◽  
Competitive Bidding ◽  
Quality Data ◽  
Rehabilitation Service ◽  
Quality Information ◽  
Conditional Logit ◽  
Provider Quality ◽  
Disabled Patients ◽  
Patients Experience ◽  
The Relationship

AbstractWe study the relationship between patient choices and provider quality in a rehabilitation service for disabled patients who receive the service frequently but do not have access to quality information. Previous research has found a positive relationship between patient choices and provider quality in health services that patients typically do not have previous experience or use frequently. We contribute by examining choices of new patients and experienced patients who were either forced to switch or actively switched their provider. In the analysis, we combine register data on patients’ choices and switches with provider quality data from a competitive bidding, and estimate conditional logit choice models. The results show that all patients prefer high-quality providers within short distances. We find that the willingness to travel for quality is highest among new patients and active switchers. These results suggest that new patients and active switchers compare different alternatives more thoroughly, whereas forced switchers choose their new provider in limited time leading into poorer choices.

scholarly journals Impact of monthly headache days on anxiety, depression and disability in migraine patients: results from the Spanish Atlas

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
P. Irimia ◽  
M. Garrido-Cumbrera ◽  
S. Santos-Lasaosa ◽  
M. Aguirre-Vazquez ◽  
J. Correa-Fernández ◽  
...  
Keyword(s):  
Quality Of Life ◽  
High Risk ◽  
Psychiatric Comorbidity ◽  
Severe Disability ◽  
Anxiety And Depression ◽  
Headache Frequency ◽  
Positive Linear Correlation ◽  
Disabled Patients ◽  
Anxiety Depression

AbstractIdentifying highly disabled patients or at high risk of psychiatric comorbidity is crucial for migraine management. The burden of migraine increases with headache frequency, but the number of headache days (HDs) per month after which disability becomes severe or the risk of anxiety and depression is higher has not been established. Here, we estimate the number of HDs per month after which migraine is associated with higher risk of anxiety and depression, severe disability and lower quality of life. We analysed 468 migraine patients (mean age 36.8 ± 10.7; 90.2% female), of whom 38.5% had ≥ 15 HDs per month. Our results show a positive linear correlation between the number of HDs per month and the risk of anxiety (r = 0.273; p < 0.001), depression (r = 0.337; p < 0.001) and severe disability (r = 0.519; p < 0.001). The risk of anxiety is higher in patients having ≥ 3HDs per month, and those with ≥ 19HDs per month are at risk of depression. Moreover, patients suffering ≥ 10HDs per month have very severe disability. Our results suggest that migraine patients with ≥ 10HDs per month are very disabled and also that those with ≥ 3HDs per month should be screened for anxiety.

scholarly journals Picking up the hydrothermal whisper at Ischia Island in the Covid-19 lockdown quiet

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Mariarosaria Falanga ◽  
Paola Cusano ◽  
Enza De Lauro ◽  
Simona Petrosino
Keyword(s):  
Pressure Fluctuations ◽  
Hydrothermal Fluids ◽  
Shallow Aquifer ◽  
Two Phase ◽  
Spectral Content ◽  
Ischia Island ◽  
Continuous Noise ◽  
Organ Pipes ◽  
Source Signals ◽  
Phase Fluid

AbstractIn this paper, we analyse the seismic noise at Ischia Island (Italy) with the objective of detecting the hydrothermal source signals taking advantage of the Covid-19 quiescence due to lockdown (strong reduction of anthropogenic noise). We compare the characteristics of the background noise in pre-, during and post-lockdown in terms of spectral content, energy release (RMS) and statistical moments. The continuous noise is decomposed into two independent signals in the 1−2 Hz and 2−4 Hz frequency bands, becoming sharpened around 1 Hz and 3 Hz respectively in lockdown. We propose a conceptual model according to which a dendritic system of fluid-permeated fractures plays as neighbour closed organ pipes, for which the fundamental mode provides the persistent whisper and the first higher mode is activated in concomitance with energy increases. By assuming reasonable values for the sound speed in low vapor–liquid mass fraction for a two-phase fluid and considering temperatures and pressures of the shallow aquifer fed by sea, meteoric and deep hydrothermal fluids, we estimate pipe lengths in the range 200–300 m. In this scheme, Ischia organ-like system can play both continuous whisper and transients, depending on the energy variations sourced by pressure fluctuations in the hydrothermal fluids.

scholarly journals Chaos for communication

2021 ◽  
Author(s):  
Murilo S. Baptista
Keyword(s):  
Information Content ◽  
Lyapunov Exponents ◽  
Communication System ◽  
Linear Superposition ◽  
Chaotic Signals ◽  
Physical Medium ◽  
Periodic Signals ◽  
Low Probability ◽  
Chaotic Interference ◽  
Source Signals

AbstractThis work shows that chaotic signals with different power spectrum and different positive Lyapunov exponents are robust to linear superposition, meaning that the superposition preserves the Lyapunov exponents and the information content of the source signals, even after being transmitted over non-ideal physical medium. This work tackles with great detail how chaotic signals and their information content are affected when travelling through medium that presents the non-ideal properties of multi-path propagation, noise and chaotic interference (linear superposition), and how this impacts on the proposed communication system. Physical media with other non-ideal properties (dispersion and interference with periodic signals) are also discussed. These wonderful properties that chaotic signals have allow me to propose a novel communication system based on chaos, where information composed from and to multiple users each operating with different base frequencies and that is carried by chaotic wavesignals, can be fully preserved after transmission in the open air wireless physical medium, and it can be trivially decoded with low probability of errors.

Mental Retardation and Learning Integrating Skills

2012 ◽  
Vol 3 (2) ◽  
pp. 64-76 ◽  
Author(s):  
Annamaria Murdaca ◽  
Francesca Cuzzocrea ◽  
Patrizia Oliva ◽  
Rosalba Larcan
Keyword(s):  
Mental Retardation ◽  
Social Life ◽  
New Technologies ◽  
Teaching Method ◽  
Cognitive Styles ◽  
Self Esteem ◽  
Assistive Technologies ◽  
Precision Teaching ◽  
Training Phase ◽  
Disabled Patients

Studies have highlighted the importance of using new technologies during the planning of educational and didactic paths to develop skills and functions in disabled patients (Bruschi, 2001). Assistive technologies represent real opportunities of e-participation to social life (Calvani, 2011; Chiappetta Caiola, 2009), which also works as scaffolding to promote developing processes (Cooke & Husey, 2002). The authors’ contribution examines the importance of technologies in supporting subjects with mental retardation. It shows the usability of many inputs that offer disabled patients the possibility to exercise cognitive styles, their own characteristics and their own autonomies to increase motivation and self esteem. The aims of this research are a) verify the effectiveness of didactic software based on Precision Teaching method; b) verify gender differences. For this study 40 children have been selected (20 boys and 20 girls) with and without mental retardation. The research consisted of 3 phases: pre-training phase, training phase and post-training phase. Results show learning improvements in each group; in spite of students’ difficulties, the use of Precision Teaching has reduced significantly the initial cognitive gap, which refers to the number of correct responses (accuracy) and to time of response (fluency) relative to the learning of how to use money.

scholarly journals Internet Usage by Patients with Multiple Sclerosis: Implications to Participatory Medicine and Personalized Healthcare

2010 ◽  
Vol 2010 ◽  
pp. 1-7 ◽  
Author(s):  
Izabella Lejbkowicz ◽  
Tamar Paperna ◽  
Nili Stein ◽  
Sara Dishon ◽  
Ariel Miller
Keyword(s):  
Multiple Sclerosis ◽  
Support Groups ◽  
Disease Duration ◽  
Internet Usage ◽  
Online Health Information ◽  
Online Information ◽  
Improve Symptom ◽  
Disabled Patients ◽  
Healthcare Optimization ◽  
Participatory Medicine

Online health information and services for patients were suggested to improve symptom management and treatment adherence, thereby contributing to healthcare optimization. This paper aimed to characterize multiple sclerosis (MS) patients Internet usage. Information regarding browsing habits, Internet reliability, and the medical team's attitude to information collected online was obtained by questionnaires from MS patients. Data was compared between nonbrowsers, browsers on MS topics, and browsers on non-MS topics only. From the 96 patients recruited, 61 (63.5%) performed MS-related searches. The most viewed topics were “understanding the disease” and “treatments”. Patients reported that the information helped coping with MS and assured them of the appropriateness of their therapy. Shorter disease duration was correlated with higher Internet activity. Disabled patients were more interested in online interaction with specialists and support groups. This paper suggests that MS patients benefit from online information, and it emphasizes the importance of resources tailored to patients needs.

Sign in / Sign up

Export Citation Format

Share Document