EEG-correlates of work efficiency level among young persons with stress-induced bruxism

2021 ◽  
pp. 25-29
Author(s):  
A. E. Barulin ◽  
S. V. Klauchek ◽  
A. E. Klauchek
Keyword(s):  
Regression Models ◽  
Alpha Rhythm ◽  
Negative Relationship ◽  
Maximum Amplitude ◽  
Dominant Frequency ◽  
Regression Equations ◽  
Microsoft Excel ◽  
The Subject ◽  
Males And Females ◽  
The Relationship

Purpose of the study. To establish the relationship between neurophysiological status and the level of efficiency in young people with bruxism.Materials and methods. Two groups of 64 and 53 subjects (males and females) aged 20–35 years old with bruxism and non-bruxers were formed according to questionnaire results and physical examination. The level of efficiency was assessed by the results of sensorimotor tracking of a moving object (the ‘Smile’ model). Spectral analysis was performed for evaluation of the baseline electroencephalograms. Microsoft Excel and Statistica 10.0 programs were used for statistical data processing.Results. The level of efficiency was statistically significantly lower in the hardest test of Smile model among the individuals with bruxism (p < 0.05). The bruxers also demonstrated a significantly lower dominant frequency and maximum amplitude of alpha-rhythm (p < 0.05), and significantly higher dominant frequency of beta2 rhythm (p < 0.05). The dominant frequency and the maximum amplitude of the alpha-rhythm are parameters corresponding to significant coefficients of the regression analysis. A negative relationship was found between the degree of error during sensorimotor tracking and the frequency and amplitude of alpha-rhythm.Conclusion. Regression models present the relationship between the level of efficiency and the alpha-rhythm severity. The regression equations make it possible to determine the functional state of the subject using an electroencephalogram.

An Investigation of the Relationship Between Oregon Coho Salmon (Oncorhynchus kisutch) Hatchery Releases and Adult Production Utilizing Law of the Minimum Regression

1983 ◽  
Vol 40 (4) ◽  
pp. 516-523 ◽  
Author(s):  
Jerry Clark ◽  
Bruce McCarl
Keyword(s):  
Density Dependence ◽  
Regression Models ◽  
Coho Salmon ◽  
Oncorhynchus Kisutch ◽  
Regression Technique ◽  
Limiting Factors ◽  
Regression Equations ◽  
Simple Simulation ◽  
The Relationship

This study examines aggregate relationships between coho salmon (Oncorhynchus kisutch) adult production and hatchery releases within the Oregon Index Area (OIA). Previous analyses have indicated the presence of density dependence, and concluded with a request for a reduction in hatchery smolt releases. The hypothesis that density dependence is exhibited in the OIA is tested via a broad correlation approach. Several regression models are used including one unique one in fisheries research based on limiting factors.Analysis was done on the fitted regression equations including a simple simulation of release policies. Neither significant density dependence nor a statistically supportable technical maximum for smolt releases was found. The limiting factors regression technique generally gives the best results of all the models employed, and thus appears potentially useful in this type of fisheries work.

scholarly journals The correlations between certain features of the journal Neotropical Ichthyology and its impact factor: a comparative analysis at the thematic and national levels

2013 ◽  
Vol 11 (1) ◽  
pp. 1-8
Author(s):  
Sabrina Menezes ◽  
Letícia Strehl
Keyword(s):  
Social Sciences ◽  
Impact Factor ◽  
Quantitative Methods ◽  
Short History ◽  
Microsoft Excel ◽  
Journal Citation Reports ◽  
The Social ◽  
Two Samples ◽  
The Subject ◽  
The Relationship

The present article analyzes the relationship between characteristics of the journal Neotropical Ichthyology and its impact factor (IF) between 2006 and 2011 using bibliometric descriptive quantitative methods. To perform this analysis, two samples of journals included in Journal Citation Reports (JCR) were studied. One sample was composed of journals classified within the subject of zoology, and the other contained journals from different areas published in Brazil. The instrument used for data collection was a database created in Microsoft Excel 2007 and the Statistical Package for the Social Sciences (SPSS) version 18. The results show that despite its short history, Neotropical Ichthyologyhas exhibited a distinctive impact, as manifested in a significant progression in the IF of this journal in the field of zoology during the investigated period.

scholarly journals Parasitism patterns and the size-fecundity relationship in the acoustically orienting dipteran parasitoid Ormia ochracea

2001 ◽  
Vol 79 (6) ◽  
pp. 973-979 ◽  
Author(s):  
Gita R Kolluru ◽  
Marlene Zuk
Keyword(s):  
Clutch Size ◽  
Reproductive Biology ◽  
Empirical Studies ◽  
Negative Relationship ◽  
Host Size ◽  
Ormia Ochracea ◽  
Teleogryllus Oceanicus ◽  
The Subject ◽  
Hymenopteran Parasitoids ◽  
The Relationship

Female parasitoids are expected to distribute offspring among hosts in a manner that maximizes fitness. Several theoretical and empirical studies have focussed on clutch-size patterns in hymenopteran parasitoids. In contrast, dipteran parasitoids, which differ from hymenopterans in potentially important ways, have received little attention. The phonotactic tachinid fly Ormia ochracea has been intensively studied for its effects on host crickets, and has recently been the subject of studies of its own reproductive biology. This work suggests a negative relationship between clutch size and progeny fitness (consistent with hymenopterans), but no adjustment of clutch size to host size (different from hymenopterans). However, the repeatability of these patterns and the relationship between fly size and fitness remain to be demonstrated. We examined clutch sizes of O. ochracea larvae in the cricket Teleogryllus oceanicus. Most clutches were smaller than a cricket can support to pupation. Smaller clutches yielded larger offspring and larger wild-caught flies had higher fecundity, supporting the idea that small clutches yield higher fitness. However, although parasitised male crickets were slightly larger than unparasitised males, there was no correlation between cricket size and the number of larvae. Potential reasons for this departure from the patterns found in hymenopteran parasitoids are discussed.

scholarly journals Height Estimation Using Arm Span and Hand Length Measurements

2017 ◽  
Vol 15 (2) ◽  
pp. 23-25
Author(s):  
Biswas Satyal ◽  
Abhishek Poudel
Keyword(s):  
Body Height ◽  
Correlation Coefficients ◽  
Regression Equations ◽  
Cross Sectional ◽  
Standing Height ◽  
Arm Span ◽  
Measuring Tape ◽  
Males And Females ◽  
Hand Length ◽  
The Relationship

Introduction: Arm span and hand length can be used for the estimation of an individual stature. Arm span, hand length, foot length, head circumference etc. have been proved to be useful to correctly estimate the height of a person. It can be useful in various medico legal purposes. Objectives: The present study was undertaken to find the correlation between the arm-span and hand length with the standing height of both males and females and to derive regression equations for estimation of their height. Materials and Method: This cross sectional type of descriptive study was carried out with a total number of 200 Nepalese medical students consisting of 120 male and 80 female aged between 18 to 24 years. Stature, arm span and hand length were measured directly from the subjects by using anthropometric technique by a measuring tape and a spreading caliper. The data taken were statistically analyzed by computation. The relationship between body height, arm span and hand length were determined using simple correlation coefficients. Result and Conclusion: In this study, the correlation between the arm-span and hand length with the standing height of both males and females was found to be an accurate predictor of the height and regression formulae were derived for calculating the height of male or female with the arm-span and hand length.

scholarly journals A study on factors related to readership of scientific articles

2017 ◽  
Vol 3 (2) ◽  
pp. 1-15 ◽  
Author(s):  
Tony Xu ◽  
Shayan Khalili ◽  
Cynthia Deng
Keyword(s):  
Linear Regression ◽  
Regression Models ◽  
Scientific Research ◽  
The Other ◽  
Linear Regression Models ◽  
Research Papers ◽  
Scatter Plots ◽  
The Subject ◽  
Moderate Effect ◽  
The Relationship

This paper analyzes the relationship between the number of Twitter and Mendeley readers with the article’s subject, publisher, journal, and title length. It also looks at which country has the greatest number of readers to see if researchers can garner more visibility by publishing an article relevant to issues in those countries. The purpose of this report is to help researchers improve the visibility and impact value of their research. The data was gathered from 550,000 scientific research papers published between January 1st and July 1st of 2016. Python’s built-in JSON library was used to extract the number of Twitter and Mendeley readers, as well as the article count for each factor. The correlation between readers per article and each factor was then visualized using bubble graphs, linear regression models, and scatter plots. This paper concludes that the length of the title is the strongest factor affecting readership. In particular, titles with lengths between 51 and 90 characters have the greatest number of readers. Moreover, articles relevant to issues in countries with a higher GDP have the highest overall readership. On the other hand, the publisher and the journal did not have a significant effect on readership, while the subject of the article had a moderate effect on readership.

scholarly journals HUBUNGAN ANTARA USIA MENARCHE DENGAN USIA MENOPAUSE PADA WANITA DI KECAMATAN KAKAS SULAWESI UTARA TAHUN 2014

e-CliniC ◽  
2015 ◽  
Vol 3 (1) ◽  
Author(s):  
Mutiara Aprilia Senolinggi ◽  
Maya Mewengkang ◽  
John Wantania
Keyword(s):  
Regression Models ◽  
Sampling Method ◽  
Inclusion Criteria ◽  
Cross Sectional ◽  
Purposive Sampling ◽  
North Sulawesi ◽  
A Value ◽  
The Subject ◽  
The Relationship ◽  
Age Of Menarche

Abstract: This stuady aimed to investigate the relationship between age of menarche to menopause in women of District Kakas of North Sulawesi in year 2014. This was a cross sectional analytic approach. Samples were taken by using purposive sampling method, in which only the samples that met the inclusion criteria that can be the subject of this study. The results showed that the value of Sig. is 0043 with a value of α = 0.05 so it could be concluded that the Sig. <0.05, then Ho is rejected and Ha accepted. It is claimed that there is a relationship between age of menarche to menopause. Correlation value (R) is 0.274 can be interpreted that the relationship between age of menarche to menopause age in the weak category because the value of the correlation <0.5. Regression models obtained Y = 58.364 to 0.879 x (y = age of menopause, x = age of menarche). Conclusion: There was a relationship between the ages of menarche to the age of menopause in women. The earlier menarche occurs, the slower the menopause arises. Conversely, the slower the menarche occurs sooner menopause arises.Keywords: age, menarche, menopauseAbstrak: Penelitian ini bertujuan untuk mengetahui hubungan antara usia menarche dengan usia menopause pada wanita di Kecamatan Kakas Sulawesi Utara tahun 2014. Penelitian ini bersifat analitik dengan pendekatan cross sectional. Sampel diambil menggunakan metode purposive sampling, dimana hanya sampel yang memenuhi kriteria inklusi yang dapat menjadi subyek penelitian ini. Hasil penelitian menunjukkan bahwa nilai Sig. adalah 0.043 dengan nilai α = 0,05 sehingga dapat disimpulkan bahwa Sig. < 0,05 maka Ho ditolak dan Ha diterima. Hal ini menyatakan bahwa ada hubungan antara usia menarche dengan usia menopause. Nilai korelasi (R) adalah 0,274 dapat diinterpretasikan bahwa hubungan antara usia menarche dengan usia menopause ada di kategori lemah karena nilai korelasi < 0,5. Model regresi yang diperoleh Y = 58,364 – 0,879 X (y = usia menopause, x = usia menarche)Simpulan: Terdapat hubungan antara usia menarche dengan usia menopause pada wanita. Makin dini menarche terjadi, makin lambat menopause timbul dan sebaliknya.Kata kunci : usia, menarche, menopause

scholarly journals Voluntary disclosure and earnings management: evidence from the Brazilian capital market

2017 ◽  
Vol 28 (74) ◽  
pp. 249-263 ◽  
Author(s):  
Silvia Consoni ◽  
Romualdo Douglas Colauto ◽  
Gerlando Augusto Sampaio Franco de Lima
Keyword(s):  
Earnings Management ◽  
Voluntary Disclosure ◽  
A Priori ◽  
Negative Relationship ◽  
Market Demand ◽  
Potential Market ◽  
Significant Negative Relationship ◽  
Theoretical Assumptions ◽  
The Subject ◽  
The Relationship

ABSTRACT This study examines the association between the voluntary disclosure of economic and financial information and earnings management. The outlined arguments on the subject are based on the assumption that consistent voluntary disclosure policies may reduce earnings management. The analysis is conducted on a random sample of 66 non-financial Brazilian listed companies in the 2005-2012 period. To measure voluntary disclosure, the index proposed by Consoni and Colauto (2016) is used. As a proxy for earnings management, discretionary accruals (DA) are estimated based on the model by Dechow, Sloan, and Sweeney (1995). The relationship between these measurements is analyzed using a model of simultaneous equations and by the random effects regression method with panel data. A significant negative relationship was expected a priori; however, the main result of the study indicates that voluntary disclosure and earnings management are not simultaneously determined or associated. Although the results obtained contradict certain theoretical assumptions, there are alternative explanations for this finding. The empirical set of evidence in this research, in addition to those in previous studies, should be interpreted with caution because there is no consensus on the measures for voluntary disclosure and earnings management. Second, several companies in Brazil may not be interested in providing high-quality voluntary disclosure because most of their shareholders enjoy private benefits of control. This issue reduces the importance of the potential market demand for information, stratifies information asymmetry, and does not prevent earnings management.

scholarly journals Economic Growth and Public Indebtedness in the Last Four Decades: Is Portugal different from the other PIIGS’ economies?

2015 ◽  
Vol 61 (6) ◽  
pp. 3-11 ◽  
Author(s):  
Ricardo Ferraz ◽  
António Portugal Duarte
Keyword(s):  
Economic Growth ◽  
Linear Regression ◽  
Public Debt ◽  
Regression Models ◽  
Time Horizon ◽  
Negative Relationship ◽  
The Other ◽  
Extended Time ◽  
Linear Regression Models ◽  
The Relationship

Abstract Portugal is a member of the group known by investors as ‘PIIGS’, countries characterised by having high public debt and weak economic growth. Using an extended time horizon, 1974–2014, this study seeks to empirically explore the relationship between economic growth and public debt in the PIIGS economies, particularly in the case of Portugal. Based on the estimation of linear regression models, it was concluded that in the last four decades there has been a negative relationship between economic growth and public debt in both cases, which is consistent with the literature. The negative relationship was even more pronounced in the case of the PIIGS than it was in the case of Portugal.

scholarly journals The Relationship Between Aggressiveness of Students and Student's Cognitive Achievement in Islamic Religious Education (Pai) in Sma Negeri 1, Cirebon City

2020 ◽  
Vol 8 (2) ◽  
pp. 146-154
Author(s):  
Tuti Alawiyah
Keyword(s):  
Religious Education ◽  
Negative Relationship ◽  
The Other ◽  
Learning Activities ◽  
Cognitive Achievement ◽  
The Subject ◽  
Children's Interests ◽  
The Relationship ◽  
Emotional Level ◽  
Strong Suspicion

Learning achievement which is influenced by the emotional level and learning activities of students makes researchers want to examine whether there is a relationship between aggressiveness and student achievement. There are negative and positive influences that arise at school, not all children who enter school are of good character, on the other hand there are children who attend school who come from families who pay less attention to children's interests in learning which often affect other friends. In education, aggressive behavior not only harms others but also harms oneself. This behavior can lead to bad character of students, especially in the subject of Islamic Religious Education that has been learned about the morals of fellow friends. The results showed a strong suspicion that there was a negative relationship between student aggressiveness and cognitive achievement, so it could be concluded that the higher the student's aggressiveness the lower the student's cognitive achievement

scholarly journals The Influence of Oxygen Saturation on the Relationship Between Hemoglobin Mass and VO2max

2018 ◽  
Vol 02 (04) ◽  
pp. E98-E104 ◽  
Author(s):  
Jesse Goodrich ◽  
Benjamin Ryan ◽  
William Byrnes
Keyword(s):  
Negative Relationship ◽  
Cycle Ergometer ◽  
Endurance Athletes ◽  
Moderate Altitude ◽  
Exercise Tests ◽  
Graded Exercise ◽  
Males And Females ◽  
Hemoglobin Mass ◽  
Exercise Induced ◽  
The Relationship

AbstractHemoglobin mass (tHb) is a key determinant of maximal oxygen uptake (VO2max). We examined whether oxyhemoglobin desaturation (ΔSaO2) at VO2max modifies the relationship between tHb and VO2max at moderate altitude (1,625 m). Seventeen female and 16 male competitive, endurance-trained moderate-altitude residents performed two tHb assessments and two graded exercise tests on a cycle ergometer to determine VO2max and ΔSaO2. In males and females respectively, VO2max (ml·kg−1·min−1) ranged from 62.5–83.0 and 44.5–67.3; tHb (g·kg−1) ranged from 12.1–17.5 and 9.1–13.0; and SaO2 at VO2max (%) ranged from 81.7–94.0 and 85.7–95.0. tHb was related to VO2max when expressed in absolute terms and after correcting for body mass (r=0.94 and 0.86, respectively); correcting by ΔSaO2 did not improve these relationships (r=0.93 and 0.83). Additionally, there was a negative relationship between tHb and SaO2 at VO2max (r=–0.57). In conclusion, across a range of endurance athletes at moderate altitude, the relationship between tHb and VO2max was found to be similar to that observed at sea level. However, correcting tHb by ΔSaO2 did not explain additional variability in VO2max despite significant variability in ΔSaO2; this raises the possibility that tHb and exercise-induced ΔSaO2 are not independent in endurance athletes.

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