scholarly journals Effect of eye massaging device towards brain rhythms

2018 ◽  
Vol 7 (4.44) ◽  
pp. 88
Author(s):  
F. A. Mansor ◽  
R. Sudirman
Keyword(s):  
Alpha Rhythm ◽  
Discrete Wavelet ◽  
Alpha Power ◽  
Eeg Signals ◽  
Test Analysis ◽  
Relaxation State ◽  
Brain Signals ◽  
Before And After ◽  
Visual Tasks ◽  
Positive Effect

This study aimed to examine the effectiveness of the eye massaging device in promoting mind relaxation state based on alpha rhythm in brain. This study has been conducted involving 35 participants whose their brain signals were captured by an electroencephalography (EEG) machine whilst they undergoing resting state, eye massaging session and visual tasks designed to induced stress. The signal is analyzed using Discrete Wavelet Transform (DWT) and the major concern of the study, relative power of alpha was extracted from channel point O1 and O2. T-test analysis used to validate the differences of relative alpha power produced before and after using the device. Based on the results, the average values of relative alpha power collected for EEG signals before using the eye massaging device has been increased for both channel (O1: before = 17.601, after = 19.765, O2: before = 12.577, after = 14.783) with an increment of 12.29% and 17.54% respectively. However, there is no enough evidence to prove that using the device give positive effect on improving participant’s relaxation state as there is only have 51.5% and 58.4% chances that the device might worked on mind relaxation state.  

Analysis on Visual Signal based on the Effect of Eye Massaging Device using Wavelet Transform

2015 ◽  
Vol 74 (6) ◽  
Author(s):  
Azmi Alwi ◽  
Fatin Afiqa Mansor ◽  
Rubita Sudirman
Keyword(s):  
Wavelet Transform ◽  
Visual Processing ◽  
Visual Signal ◽  
Eeg Signals ◽  
Test Analysis ◽  
Average Value ◽  
Brain Signals ◽  
Before And After ◽  
Conventional Electrode ◽  
The Brain

This study has been conducted to examine the effectiveness of the eye massaging device to reduce massive amount of eyesight problem. The electrical activity of the muscles surrounding the eyes is recorded by using Neurofax EEG-9200 machine. Electroencephalography (EEG) is a process to determine the brain signal, while Electrooculography (EOG) is used to measure the biopotential produced by the changes in eye position and eye movement occurred. The conventional electrode setting (also called 10-20) system is applied on the scalp electrodes for EEG to record the brain signals. While five electrodes on the forehead is used to record EOG signals. Channel O1 and O2 that act as visual processing is selected in order to record EEG signals. The signal is analyzed using Wavelet Transform and the useful parameter, Energy of Approximation (Ea) was extracted. In this study, t-test analysis is used to validate the differences of data produced before and after using eye massaging device. Based on the results, the average value collected for EEG signals before using the eye massaging device has been decreased for both channel with the different (O1: 5.083, O2: 3.385). Thus, it is proved that the eye massaging device exhibit difference for each movement tested. 

scholarly journals Investigating the Effect of COVID-19 Infection on P300 Based BCI Application Performance

2021 ◽  
Vol 38 (6) ◽  
pp. 1767-1773
Author(s):  
Onur Erdem Korkmaz ◽  
Onder Aydemir ◽  
Emin Argun Oral ◽  
Ibrahim Yucel Ozbek
Keyword(s):  
Occipital Region ◽  
Eeg Signals ◽  
Test Analysis ◽  
Application Performance ◽  
Single Output ◽  
Significant Difference ◽  
Before And After ◽  
Significance Levels ◽  
The Impact ◽  
Electroencephalogram Eeg

The COVID-19, which has rapidly spread and infected millions of people from all over the world, causes various problems including psychiatric, economic, educational as well as health. Many studies have been reported that COVID-19 can be characterized by vascular damage predominantly involving micro vessels. In this study, we proposed a method to examine whether COVID-19 effects on brain computer interface (BCI) performance or not. We collected P300 based electroencephalogram (EEG) signals from six subjects before and after the COVID-19 infection. For classifying the P300 and non-P300 EEG signals, single output and two-layer artificial neural network was utilized. Based on the t-test analysis, it was observed that there was a significant difference between the before and after COVID-19 infection test groups especially on Oz channel in occipital region for alpha=0.05 percent while that of for alpha=0.01 percent shows no statistical difference for P300 classification results. The latency values, on the other hand, before and after COVID-19 infection did not represent any difference for both significance levels. It is clearly understood from the literature that COVID-19 negatively effects to the microvascular bed. Therefore, it might be expected that it could cause to reduce the P300 based BCI performance. This was the first study to investigate the impact of COVID-19 on P300-based BCI performance, taking into account the EEG signals of the COVID-19 infection. The obtained results showed that although the COVID-19 infection did not generally effected P300 based BCI application performance and latency values, the performance of the occipital region electrodes slightly effected.

NON-INVASIVE BCI METHOD: EEG - ELECTROENCEPHALOGRAPHY

2019 ◽  
pp. 139-145
Author(s):  
Selma Büyükgöze
Keyword(s):  
Brain Computer Interface ◽  
Computer Interface ◽  
Electrode Placement ◽  
Eeg Signals ◽  
Non Invasive ◽  
Brain Signals ◽  
Brain States ◽  
The Brain

Brain Computer Interface consists of hardware and software that convert brain signals into action. It changes the nerves, muscles, and movements they produce with electro-physiological signs. The BCI cannot read the brain and decipher the thought in general. The BCI can only identify and classify specific patterns of activity in ongoing brain signals associated with specific tasks or events. EEG is the most commonly used non-invasive BCI method as it can be obtained easily compared to other methods. In this study; It will be given how EEG signals are obtained from the scalp, with which waves these frequencies are named and in which brain states these waves occur. 10-20 electrode placement plan for EEG to be placed on the scalp will be shown.

ANALISIS KINERJA KEUANGAN PERUSAHAAN PROPERTI YANG TERDAFTAR DI BEI SEBELUM DAN SESUDAH KEBIJAKAN LOAN TO VALUE

2019 ◽  
Vol 4 (1) ◽  
pp. 79-90
Author(s):  
Ghaniy Ridha Prima ◽  
Hermanto Siregar ◽  
Ferry Syarifuddin
Keyword(s):  
Real Estate ◽  
Financial Performance ◽  
Stock Exchange ◽  
Sample Selection ◽  
Test Analysis ◽  
Asset Return ◽  
Return On Equity ◽  
Analysis Technique ◽  
Significant Difference ◽  
Before And After

The purpose of this study is to provide empirical evidence of the effects of the Loan to Value (LTV) policy on the financial performance of property and real estate companies listed on the Indonesia Stock Exchange (IDX). The sample selection uses a purposive sampling method of 42 property and real estate companies that meet the criteria. The research period is divided into 2 namely before the Loan to Value policy (2013-2014) and after the Loan to Value policy (2016-2017) with the Paired Sample t Test analysis technique. The test results show if the current ratio, Return on Asset, Return on Equity and Debt to Asset have significant differences between before and after the LTV policy is applied. While the fast ratio, cash ratio, net profit margin and Debt to Equity did not show a significant difference. Keywords: Financial Performance, Loan to Value, Property and Real Estate, Profitability Ratio, Liquidity Ratio, Solvability Ratio.

ANALISIS EFEKTIVITAS PROGRAM USAHA AGRIBISNIS PERDESAAN (PUAP) SERTA DAMPAKNYA TERHADAP TINGKAT PENDAPATAN PETANI (STUDI KASUS PADA GABUNGAN KELOMPOK TANI TELUK JAYA)

2014 ◽  
Vol 5 (2) ◽  
Author(s):  
Yudi Triyanto
Keyword(s):  
Poverty Alleviation ◽  
F Test ◽  
Income Levels ◽  
Before And After ◽  
Program Funding ◽  
Independent Variable ◽  
Farmer Income ◽  
Positive Effect ◽  
Group Association

Study the effectivity analysis of Program Usaha Agribisnis Perdesaan (PUAP) and its impact on farmer income levels (case study of the Teluk Jaya Farmers Group Association) aims to 1. knowing how large the effectivity of PUAP funds is for income levels in poverty alleviation in Teluk Desa Sentosa Panai Hulu Subdistrict, 2. to analyze and determine the level of income of Gapoktan Teluk Jaya Farming Business in Teluk Sentosa, Panai Hulu Subdistrict before and after receiving PUAP assistance. The results showed that the effectivity of PUAP program funding is very effective and good, it can be seen from the results of the F test of 12.406 with a significant level of 0.000 while the F value of the table is 2.051. When compared to the value of F test (12.406) > Ftable (2.051) at α 5%, it was concluded that simultaneously the effectivity variable and the PUAP program had a positive effect. The increase in income of the Teluk Jaya Farmers Group in Teluk Sentosa after receiving PUAP funds can be known from the t table for the effectivity variable of 2.663 and the PUAP program for 1.270 with a significant value for each independent variable (2.051); (0.073). Whereas for the t table value in the distribution statistics t table with the level of test α = 5% and df1 = 27 of 2,051. Based on the criteria that if the value is t count> t table); namely (2.663> 2,051) (1,270> 2,051) so that it can be concluded that the effectivity variable partially has a positive and significant effect on the income level.Keywords : effectivity variable,  income level, PUAP program

scholarly journals The Demerger Impact upon Sustainable Development of Economic Entities: Evidence from Romania

2021 ◽  
Vol 13 (15) ◽  
pp. 8316
Author(s):  
Camelia Mirela Baba ◽  
Constantin Duguleană ◽  
Marius Sorin Dincă ◽  
Liliana Duguleană ◽  
Gheorghița Dincă
Keyword(s):  
Sustainable Development ◽  
Business Strategies ◽  
The Sustainable Development ◽  
Ex Post ◽  
Before And After ◽  
Almost All ◽  
The Impact ◽  
Profitability Ratios ◽  
Positive Effect

The Covid-19 induced economic crisis has significantly affected almost all businesses from nearly every sector, causing severe financial problems, lack of cash assets, and decrease of revenues. In this context, the economic entities were forced to look for adjustment and rescue solutions of their activities. One possible solution for the recovery and reorganization of economic entities’ activities is demerger. This paper evaluates the impact of demerger upon the sustainable development of economic entities in terms of economic efficiency and financial performances. To achieve this goal, a statistical analysis of profitability ratios before and after the demerger, as well as a structural analysis of 268 demerger projects for the April 2012–April 2021 period, were performed. The results attest there are no significant differences between the ex-ante and ex-post financial performances. However, demerger seems to have a positive effect upon analyzed companies helping them to overcome economic hardships, rethink their business strategies, and continue their activity in the medium and long-term time horizon.

scholarly journals Influence on Forgiveness, Character Strengths and Satisfaction with Life of a Short Mindfulness Intervention via a Spanish Smartphone Application

2021 ◽  
Vol 18 (2) ◽  
pp. 802
Author(s):  
Juan Pablo Pizarro-Ruiz ◽  
Nuria Ordóñez-Camblor ◽  
Mario Del-Líbano ◽  
María-Camino Escolar-LLamazares
Keyword(s):  
Negative Affect ◽  
Satisfaction With Life ◽  
Character Strengths ◽  
Well Being ◽  
Smartphone Application ◽  
Control Group ◽  
Psychological Practice ◽  
Before And After ◽  
Reducing Stress ◽  
Positive Effect

Mindfulness-based interventions (MBI) are a recognized effective psychological practice characterized by attention control, awareness, acceptance, non-reactivity, and non-judgmental thinking obtained through the practice of meditation. They have been shown to be useful in reducing stress and enhancing well-being in different contexts. In this research, the effectiveness of an MBI was evaluated on variables that can promote successful job performance such as mindfulness trait, positive and negative affect, forgiveness, personality strengths and satisfaction with life. The intervention was carried out through a smartphone application called “Aire Fresco” (Fresh Air) during 14 days in the middle of the quarantine produced by the Covid-19 pandemic. The study sample was composed of 164 Spanish people who were distributed in two groups: control group and experimental group, which were evaluated before and after the intervention. The MANCOVA performed showed an overall positive effect of the intervention on the variables evaluated. The different ANCOVAs carried out showed that the intervention was beneficial in increasing mindfulness trait, reducing negative affect or increasing life satisfaction, among others. Our study is, as far as we know, the first to demonstrate the effectiveness of a brief intervention in mindfulness conducted using a smartphone application in Spanish.

scholarly journals Effects of pre-extraction intermittent PTH administration on extraction socket healing in bisphosphonate administered ovariectomized rats

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Jae-Young Kim ◽  
Hyo-Won Jang ◽  
Jung-In Kim ◽  
In-Ho Cha
Keyword(s):  
Tooth Extraction ◽  
Bisphosphonate Therapy ◽  
Ovariectomized Rats ◽  
Control Group ◽  
Micro Ct ◽  
Micro Computed Tomography ◽  
Extraction Socket ◽  
Before And After ◽  
Socket Healing ◽  
Positive Effect

AbstractThe purpose of this study was to investigate the effect of administering intermittent parathyroid hormone (iPTH) before tooth extraction versus after tooth extraction on the risk of developing MRONJ in experimental animal model. Twenty-five ovariectomized rats received 6 weeks of bisphosphonate therapy. They were classified into 3 groups, based on the timing of the medication, as Control, Pre-PTH and Post-PTH groups. For Control group, normal saline was administered before and after tooth extraction. iPTH was administered during 4 weeks before tooth extraction for Pre-PTH group and after tooth extraction for Post-PTH group. The animals were euthanized 8 weeks after tooth extraction. Macroscopic, histological, micro-computed tomography (micro-CT), and histomorphometric examinations were conducted. The incidences of impaired healing were 11.11% both in Pre-PTH and Post-PTH groups, which was lower than the Control group (42.86%). Bone healing in the extraction socket, based on micro-CT and histomorphometry evaluations, was best in Post-PTH and worst in Control group. The Pre-PTH group showed moderate healing pattern. Despite of limitations in this study, the authors identified Pre-PTH group seems to have positive effect on extraction socket healing. With regard to timing, administering iPTH after tooth extraction was superior to applying it before tooth extraction.

The financial impact of the financial fair play policy on Spanish football

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Roberto Fernández-Villarino ◽  
J. Andrés Domínguez-Gómez
Keyword(s):  
Financial Performance ◽  
Fiscal Year ◽  
Professional Football ◽  
Content Type ◽  
General Terms ◽  
Football Clubs ◽  
Before And After ◽  
The Law ◽  
Compliance With The Law ◽  
Positive Effect

PurposeThis study aims to explore how responsible corporate behaviour, specifically self-imposed financial regulatory control, might subsequently be reflected in the financial performance of companies subject to such regulation.Design/methodology/approachIn this study, the authors aim to explore how financial compliance in the form of the Economic Control Regulation (ECR) has impacted on the financial performance of professional football clubs in Spain. To this purpose, the authors adopted a quasi-experimental before and after study design. This type of design assesses the object of study before and after a specific event in order to determine whether this event has had any effects on the object. In this case, the event was the coming into effect of the ECR in the fiscal year of 2012, and the object hypothetically affected was the clubs’ economic performance.FindingsThe authors can confirm that in general terms and for the whole set of clubs analysed, the ECR has had a strong and positive effect on financial performance.Research limitations/implicationsIn this study, the authors wish to establish a link between the idea of “compliance” and that of “responsible corporate management practice”. It is not just a matter of compliance with the law. The fact of complying with certain laws could, in general terms, or from the point of view of common sense, be qualified as “responsible behaviour”. However, under the contemporary concept of corporate responsibility, compliance with the law is a behaviour that must be taken for granted. Responsibility, therefore, would entail going beyond such expected behaviour to one that exceeds the environment's expectation of the corporate actor.Practical implicationsWhat extent improvements in financial performance have also boosted social performance. Confirming such a positive effect endorses the argument that ethical improvements in corporate culture have a general effect on business sustainability in its different aspects: economic, social, environmental and in governance.Social implicationsThe authors may foresee that the culture of compliance will spread from the finance departments to other management areas. Its connection with ethical business practice is directly linked to the more complex concept of the “citizen company”. There are suggest interesting bases on which professional football clubs might move from a traditional profit-oriented company model towards a more contemporary one oriented towards relationships of integrity with the sport's environment. This study shows that the ECR has been a starting point for the development of Spanish professional football clubs towards this type of “citizen company”.Originality/valueIt was a single-sector study whose principal value lies in the verification of whether responsible economic management (the main consequence of applying the ECR) had any effects on company profits, financial results and other important indicators. In addition to fostering responsibility, this new management model involves a special innovation, as it is based on self-regulation (i.e. on regulations not imposed by national or supranational states), designed and implemented to ensure the sector's viability.

scholarly journals Gender based EEG before and after acute bout of aerobic exercise

2014 ◽  
Vol 6 (2) ◽  
pp. 29-34
Author(s):  
Nirmala Limbu ◽  
Ramanjan Sinha ◽  
Meenakshi Sinha ◽  
Bishnu Hari Paudel
Keyword(s):  
Acute Exercise ◽  
Healthy Adult ◽  
Alpha Power ◽  
Medical Sciences ◽  
Acute Bout ◽  
Before And After ◽  
Eeg Changes ◽  
Gender Based ◽  
Exercise Induced ◽  
Almost All

Objective: We aimed to investigate how EEG frequency bands change in females in response to acute exercise compared to males.Methods: Consenting healthy adult females (n=15) & males (n=15) bicycled an ergometer at 50% HRmax for 20 min. EEG was recorded using 10-20 system from mid-frontal (F4 & F3), central (C4 & C3), parietal (P4 & P3), temporal (T4 & T3) & occipital (O2 & O1) regions. Exercise-induced EEG changes were compared between two sexes by Mann Whitney test. EEG power (μV2) is presented as median & interquartile range.Results: In females, as compared to males, resting right side delta, alpha, and beta activities were more in almost all recorded sites [delta: F4= 49.82 (44.23-63.56) vs. 35.5 (32.70-44.44), p < 0.001; etc], [alpha F4: 127.62 (112.89-149.03) vs. 49.36 (46.37-52.98), p < 0.001; etc], [beta F4= 18.96 (15.83-25.38)  vs. 14.77 (10.34-17.55), p < 0.05; C4= 21.16 (18.4-25.9) vs. 15.48 (9.66-19.40), p < 0.01; etc]. Similarly, females resting right theta activity was more in parietal [P4= 33.04 (25.1-42.41) vs. 22.3 (18.36-34.33), p < 0.05] & occipital [O2= 50.81 (30.64-66.8) vs. 26.85 (22.18-34.42), p < 0.001] regions than in males. They had similar picture on the left side also. The delta values of right alpha power was less in female in frontal [F4= -11.61 (-45.24 -3.64) vs. 9.48 (1.05-16.58), p < 0.01] and central [C4= -72 (-32.98-9.48) vs. 22.69 (13.03-33.05), p < 0.01] regions compared to males. Also, they had less delta values of left central alpha [C3= -8.32 (-32.65-6.1) vs. 16.5 (0.36-36.36), p < 0.01] and temporal beta [T3= -6.29 (-10.09- -1.49) vs. 1.24 (-0.84- 2.8), p < 0.001] power compared to males.Conclusion: At rest females may have high EEG powers in different bands. In response to acute exercise, they respond in reverse way as compared to males.DOI: http://dx.doi.org/10.3126/ajms.v6i2.11116Asian Journal of Medical Sciences Vol.6(2) 2015 30-35

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