A step forward in the quest for a mobile EEG-designed epoch for psychophysiological studies

2019 ◽  
Vol 64 (6) ◽  
pp. 655-667 ◽  
Author(s):  
Sebastián A. Balart-Sánchez ◽  
Hugo Vélez-Pérez ◽  
Sergio Rivera-Tello ◽  
Fabiola R. Gómez Velázquez ◽  
Andrés A. González-Garrido ◽  
...  
Keyword(s):  
Comparative Analysis ◽  
International System ◽  
Central Area ◽  
Behavioral Responses ◽  
Clinical Grade ◽  
Healthy Individuals ◽  
Eeg Data ◽  
Wide Range ◽  
Eeg Recordings ◽  
Visual Oddball

Abstract The aim of this study was to compare a reconfigurable mobile electroencephalography (EEG) system (M-EMOTIV) based on the Emotiv Epoc® (which has the ability to record up to 14 electrode sites in the 10/20 International System) and a commercial, clinical-grade EEG system (Neuronic MEDICID-05®), and then validate the rationale and accuracy of recordings obtained with the prototype proposed. In this approach, an Emotiv Epoc® was modified to enable it to record in the parieto-central area. All subjects (15 healthy individuals) performed a visual oddball task while connected to both devices to obtain electrophysiological data and behavioral responses for comparative analysis. A Pearson’s correlation analysis revealed a good between-devices correlation with respect to electrophysiological measures. The present study not only corroborates previous reports on the ability of the Emotiv Epoc® to suitably record EEG data but presents an alternative device that allows the study of a wide range of psychophysiological experiments with simultaneous behavioral and mobile EEG recordings.

QEEG Biomarkers for ECT Treatment Response in Schizophrenia

2021 ◽  
pp. 155005942110582
Author(s):  
Jiayue Cheng ◽  
Yanyan Ren ◽  
Qiumeng Gu ◽  
Yongguang He ◽  
Zhen Wang
Keyword(s):  
Negative Symptoms ◽  
Central Area ◽  
Occipital Cortex ◽  
Brain Network ◽  
Quantitative Electroencephalography ◽  
Beta Band ◽  
Eeg Data ◽  
Eeg Recordings ◽  
The Right ◽  
Response Group

Background: Electroconvulsive therapy (ECT) is a clinically effective treatment for schizophrenia (SZD). However, studies have shown that only about 50 to 80% of patients show response to ECT. To identify the most suitable patients for ECT, developing biomarkers predicting ECT response remains an important goal. This study aimed to explore the quantitative electroencephalography (QEEG) biomarkers to predict ECT efficacy. Methods: Thirty patients who met DSM-5 criteria for SZD and had been assigned to ECT were recruited. 32-lead Resting-EEG recordings were collected one hour before the initial ECT treatment. Positive and negative symptoms scale (PANSS) was assessed at baseline and after the eighth ECT session. EEG data were analyzed using mutual information. Results: In the brain network density threshold range of 0.05 to 0.2, the assortativity of the right temporal, right parietal, and right occipital cortex in the response group was significantly higher than that in the non-response group ( p  <  .05) in the beta band. In the theta band, the left frontal, parietal, right occipital cortex, and central area assortativity were higher in the response group than in the non-response group ( p  <  .05). Conclusions: QEEG might be a useful approach to identify the candidate biomarker for ECT in clinical practice.

Benchmarking the practices of flexibility with maturity models and frameworks of organizational capabilities

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Sanjai Kumar Shukla ◽  
Sushil
Keyword(s):  
Information Technology ◽  
Comparative Analysis ◽  
Business Environment ◽  
Organizational Capabilities ◽  
Maturity Model ◽  
Human Capabilities ◽  
Maturity Models ◽  
Content Type ◽  
Wide Range ◽  
Flexibility Maturity

PurposeOrganizational capabilities are crucial to achieve the objectives. A plethora of maturity models is available to guide organizational capabilities that create a perplexing situation about what stuff to improve and what to leave. Therefore, a unified maturity model addressing a wide range of capabilities is a necessity. This paper establishes that a flexibility maturity model is an unified model containing the operational, strategic and human capabilities.Design/methodology/approachThis paper does a comparative analysis/benchmarking studies of different maturity models/frameworks widely used in the information technology (IT) sector with respect to the flexibility maturity model to establish its comprehensiveness and application in the organization to handle multiple goals.FindingsThis study confirms that the flexibility maturity model has the crucial elements of all the maturity models. If the organizations use the flexibility maturity model, they can avoid the burden of complying with multiple ones and become objective-driven rather than compliance-driven.Research limitations/implicationsThe maturity models used in information technology sectors are used. This work will inspire other maturity models to adopt flexibility phenomena.Practical implicationsThe comparative analysis will give confidence in application of flexibility framework. The business environment and strategic options across organizations are inherently different that the flexibility maturity model well handles.Social implicationsA choice is put to an organization to see the comparison tables produced in this paper and choose the right framework according to the prevailing business situation.Originality/valueThis is the first study that makes a conclusion based on comparative benchmarking of existing maturity models.

scholarly journals On Harmonization of Business Accounting and the SNA

2020 ◽  
Vol 27 (5) ◽  
pp. 16-22
Author(s):  
Yu. N. Ivanov ◽  
T. A. Khomenko
Keyword(s):  
Comparative Analysis ◽  
National Accounts ◽  
Information Base ◽  
Wide Range ◽  
Analytical Work ◽  
Two Systems ◽  
The Usa ◽  
The Russian Federation ◽  
Ministry Of Finance

The article considers a wide range of questions pertaining to possible and applicable harmonization of business accounting and the SNA which would, if implemented, facilitate the improvement of the information base for the compilation of national accounts and consistency of analysis of economy at micro and macro levels. The authors note that total harmonization of the two systems of information cannot be achieved due to diff erences in their key objectives. The harmonization of selected indicators and classifi cation, however, is possible and useful. In this context, the views on this matter of internationally-recognized national accounts experts, such as R. Ruggles (the USA) and F. Bos (the Netherlands), are commented on. A comparative analysis of concepts and defi nitions of some indicators of both systems is presented in the article. In particular, the diff erences between the income defi nitions. For instance, it is noted that the SNA defi nition of income is based on the concept developed by J. Hiсks and it excludes income from sales of assets and holding gains, whereas in business accounting this method is not adopted. The diff erences between two systems in defi nitions of sale of output, input, profi t and methods of valuation of indicators are also described in the article. The authors substantiate the possible directions and sequence of individual steps to the harmonization of the SNA and business accounting in the Russian Federation. They emphasize the need for close interaction between Rosstat and the Ministry of Finance of Russia in carrying out this vital work, which is necessary for creating single information, statistical and methodological space in Russia, to improve the quality of statistics and accounting, analytical work in general and management decisions.

scholarly journals Testing the habituation assumption underlying models of parasitoid foraging behavior

PeerJ ◽  
2017 ◽  
Vol 5 ◽  
pp. e3097 ◽  
Author(s):  
Paul K. Abram ◽  
Antonino Cusumano ◽  
Katrina Abram ◽  
Stefano Colazza ◽  
Ezio Peri
Keyword(s):  
Foraging Behavior ◽  
Time Allocation ◽  
Behavioral Response ◽  
Behavioral Responses ◽  
Protein Synthesis Inhibitor ◽  
Partial Recovery ◽  
Behavioral Strategies ◽  
Atpase Inhibitor ◽  
Wide Range ◽  
Training Interval

BackgroundHabituation, a form of non-associative learning, has several well-defined characteristics that apply to a wide range of physiological and behavioral responses in many organisms. In classic patch time allocation models, habituation is considered to be a major mechanistic component of parasitoid behavioral strategies. However, parasitoid behavioral responses to host cues have not previously been tested for the known, specific characteristics of habituation.MethodsIn the laboratory, we tested whether the foraging behavior of the egg parasitoidTrissolcus basalisshows specific characteristics of habituation in response to consecutive encounters with patches of host (Nezara viridula) chemical contact cues (footprints), in particular: (i) a training interval-dependent decline in response intensity, and (ii) a training interval-dependent recovery of the response.ResultsAs would be expected of a habituated response, wasps trained at higher frequencies decreased their behavioral response to host footprints more quickly and to a greater degree than those trained at low frequencies, and subsequently showed a more rapid, although partial, recovery of their behavioral response to host footprints. This putative habituation learning could not be blocked by cold anesthesia, ingestion of an ATPase inhibitor, or ingestion of a protein synthesis inhibitor.DiscussionOur study provides support for the assumption that diminishing responses of parasitoids to chemical indicators of host presence constitutes habituation as opposed to sensory fatigue, and provides a preliminary basis for exploring the underlying mechanisms.

scholarly journals New insights on the dynamics of the Sumatra and Mariana complexes inferred from the comparative analysis of gravity data and model predictions

2020 ◽  
Author(s):  
Arcangela Bollino ◽  
Anna Maria Marotta ◽  
Federica Restelli ◽  
Alessandro Regorda ◽  
Roberto Sabadini
Keyword(s):  
Comparative Analysis ◽  
Gravity Field ◽  
Wide Spectrum ◽  
Gravity Data ◽  
Gravity Anomalies ◽  
Phase Changes ◽  
Wide Range ◽  
Model Predictions ◽  
Dip Angle ◽  
The Masses

&lt;p&gt;Subduction is responsible for surface displacements and deep mass redistribution. This rearrangement generates density anomalies in a wide spectrum of wavelengths which, in turn, causes important anomalies in the Earth's gravity field that are visible as lineaments parallel to the arc-trench systems. In these areas, when the traditional analysis of the deformation and stress fields is combined with the analysis of the perturbation of the gravity field and its slow time variation, new information on the background environment controlling the tectonic loading phase can be disclosed.&lt;/p&gt;&lt;p&gt;Here we present the results of a comparative analysis between the geodetically retrieved gravitational anomalies, based on the EIGEN-6C4 model, and those predicted by a 2D thermo-chemical mechanical modeling of the Sumatra and Mariana complexes.&lt;/p&gt;&lt;p&gt;The 2D model accounts for a wide range of parameters, such as the convergence velocity, the shallow dip angle, the different degrees of coupling between the facing plates. The marker in cell technique is used to compositionally differentiate the system. Phase changes in the crust and in the mantle and mantle hydration are also allowed. To be compliant with the geodetic EIGEN-6C4 gravity data, we define a model normal Earth considering the vertical density distribution at the margins of the model domain, where the masses are not perturbed by the subduction process.&lt;/p&gt;&lt;p&gt;Model predictions are in good agreement with data, both in terms of wavelengths and magnitude of the gravity anomalies measured in the surroundings of the Sumatra and Marina subductions. Furthermore, our modeling supports that the differences in the style of the gravity anomaly observed in the two areas are attributable to the different environments &amp;#8211; ocean-ocean or ocean-continental subduction &amp;#8211; that drives a significantly different dynamic in the wedge area.&lt;/p&gt;

scholarly journals Лексико-семантический анализ лексемы балтырған (с использованием материалов корпуса башкирского языка)

2020 ◽  
Vol 13 (5) ◽  
pp. 1406-1414
Author(s):  
Anita Sh. Ishmukhametova ◽  
Keyword(s):  
Comparative Analysis ◽  
Medicinal Plant ◽  
Cultural Heritage ◽  
Plant Species ◽  
Comparative Investigation ◽  
Medicinal Herb ◽  
Wide Range ◽  
Plant Names ◽  
The World

Identification of names of plant curatives and substances in folk and fiction texts shows close interactions between man and the world, attitudes of people towards nature. Research in phytonyms and medicinal plant names proper is most essential for the understanding of a nation’s cultural heritage. The paper examines the lexeme балтырған in Bashkir discourse. Materials. The analyzed materials include linguistic dictionaries, folklore and fiction texts of the Machine Fund of the Bashkir Language, and etymological dictionaries of Altaic languages. Goals. The study aims at a comparative investigation of the lexeme балтырған ‘hogweed’. Results. The term proves a widespread phytonym in Bashkir discourse, which is attested by that it denotes a wide range of plant species in Bashkir and has parallels in other Turkic and Mongolic languages. The lexeme is included in academic, explanatory, dialectal, phrasal, and mythological dictionaries of the Bashkir language. The comparative analysis shows that baltyrγan ‘hogweed’ usually denotes a plant of the order Apiales, a medicinal herb. Baltyrγan~ baltirγana contains the initial bal / baltïr / baldïr with the meaning ‘green, young, fresh’.

scholarly journals Signal-space projection suppresses the tACS artifact in EEG recordings

2019 ◽  
Author(s):  
Johannes Vosskuhl ◽  
Tuomas P. Mutanen ◽  
Toralf Neuling ◽  
Risto J. Ilmoniemi ◽  
Christoph S. Herrmann
Keyword(s):  
Brain Activity ◽  
Current Source ◽  
Oscillatory Activity ◽  
Signal Space ◽  
Artifact Correction ◽  
Eeg Data ◽  
Before And After ◽  
Transcranial Alternating Current Stimulation ◽  
Space Projection ◽  
Eeg Recordings

1.AbstractBackgroundTo probe the functional role of brain oscillations, transcranial alternating current stimulation (tACS) has proven to be a useful neuroscientific tool. Because of the huge tACS-caused artifact in electroencephalography (EEG) signals, tACS–EEG studies have been mostly limited to compare brain activity between recordings before and after concurrent tACS. Critically, attempts to suppress the artifact in the data cannot assure that the entire artifact is removed while brain activity is preserved. The current study aims to evaluate the feasibility of specific artifact correction techniques to clean tACS-contaminated EEG data.New MethodIn the first experiment, we used a phantom head to have full control over the signal to be analyzed. Driving pre-recorded human brain-oscillation signals through a dipolar current source within the phantom, we simultaneously applied tACS and compared the performance of different artifact-correction techniques: sine subtraction, template subtraction, and signal-space projection (SSP). In the second experiment, we combined tACS and EEG on a human subject to validate the best-performing data-correction approach.ResultsThe tACS artifact was highly attenuated by SSP in the phantom and the human EEG; thus, we were able to recover the amplitude and phase of the oscillatory activity. In the human experiment, event-related desynchronization could be restored after correcting the artifact.Comparison with existing methodsThe best results were achieved with SSP, which outperformed sine subtraction and template subtraction.ConclusionsOur results demonstrate the feasibility of SSP by applying it to human tACS–EEG data.

Proceeding on Cases with the Participation of Foreign Persons in International Procedure Law of Russia and Belarus (The end)

2021 ◽  
pp. 123
Author(s):  
William Elliott Butler
Keyword(s):  
Comparative Analysis ◽  
International Treaties ◽  
International Jurisdiction ◽  
Legal Documents ◽  
Procedural Law ◽  
Wide Range ◽  
Domestic Legislation ◽  
Recognition And Enforcement ◽  
Regional Character

This article is dedicated to one of the most interesting aspects of International Procedural Law – litigation with the participation of foreign persons. Authors focused on a comparative analysis of Russian and Belarus legislation concerning the regulation of international procedural relations. Article includes two parts: the first one considers international jurisdiction of Russian arbitrazh courts and Belarus economic courts on commercial matters; the second one examines the recognition and enforcement of foreign judgments in commercial matters on the territory of Russia and Belarus. Authors deeply scrutinized a wide range of legal documents including domestic legislation, bilateral and multilateral international treaties of regional character in order to show the convergences and divergences in Russian and Belarus procedural law concerning participation of foreign persons in international commercial litigation

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