scholarly journals The influence of vertical disparity gradient and cue conflict on EEG omega complexity in Panum’s limiting case

2018 ◽  
Vol 119 (3) ◽  
pp. 1201-1208 ◽  
Author(s):  
Huayun Li ◽  
Huibin Jia ◽  
Dongchuan Yu
Keyword(s):  
Event Related Potential ◽  
Eeg Signal ◽  
Occipital Region ◽  
Vertical Disparity ◽  
Neural Activities ◽  
Two Factors ◽  
Disparity Gradient ◽  
Limiting Case ◽  
Different Levels ◽  
Cue Conflict

Using behavioral measures and ERP technique, researchers discovered at least two factors could influence the final perception of depth in Panum’s limiting case, which are the vertical disparity gradient and the degree of cue conflict between two- and three-dimensional shapes. Although certain event-related potential components have been proved to be sensitive to the different levels of these two factors, some methodological limitations existed in this technique. In this study, we proposed that the omega complexity of EEG signal may serve as an important supplement of the traditional event-related potential technique. We found that the trials with lower vertical gradient disparity have lower omega complexity (i.e., higher global functional connectivity) of the occipital region, especially that of the right-occipital hemisphere. Moreover, for occipital omega complexity, the trials with low-cue conflict have significantly larger omega complexity than those with medium- and high-cue conflict. It is also found that the electrodes located in the middle line of the occipital region (i.e., POz and Oz) are more crucial to the impact of different levels of cue conflict on omega complexity than the other electrodes located in the left- and right-occipital hemispheres. These evidences demonstrated that the EEG omega complexity could reflect distinct neural activities evoked by Panum’s limiting case configurations, with different levels of vertical disparity gradient and cue conflict. Besides, the influence of vertical disparity gradient and cue conflict on omega complexity may be regional dependent. NEW & NOTEWORTHY The EEG omega complexity could reflect distinct neural activities evoked by Panum’s limiting case configurations with different levels of vertical disparity gradient and cue conflict. The influence of vertical disparity gradient and cue conflict on omega complexity is regional dependent. The omega complexity of EEG signal can serve as an important supplement of the traditional ERP technique.

The neural correlates of vertical disparity gradient and cue conflict in Panum’s limiting case

2017 ◽  
Vol 114 ◽  
pp. 11-19 ◽  
Author(s):  
Huayun Li ◽  
Huibin Jia ◽  
Ashley Chung-Fat-Yim ◽  
Laipeng Jin ◽  
Dongchuan Yu
Keyword(s):  
Neural Correlates ◽  
Vertical Disparity ◽  
Disparity Gradient ◽  
Limiting Case ◽  
Cue Conflict

scholarly journals Yield and yield components of wheat as affected by phosphorus fertilization

2015 ◽  
Vol 41 ◽  
pp. 21-27 ◽  
Author(s):  
M. S. Alam ◽  
I. Jahan
Keyword(s):  
Grain Yield ◽  
Plant Height ◽  
Yield Components ◽  
Agricultural Extension ◽  
Control Treatment ◽  
Phosphorus Fertilization ◽  
Wheat Varieties ◽  
Yield And Yield Components ◽  
Two Factors ◽  
Different Levels

The experiment was conducted at the Agronomy Field laboratory, Department of Agronomy and Agricultural Extension, University of Rajshahi to study the yield and yield components of wheat as affected by phosphorus fertilization. The experiment consisted of two factors i.e. (i) three wheat varieties viz., Shatabdi, Bijoy and Prodip and (ii) five levels of phosphorus viz. 0, 30, 60, 90, 120 kg P2O5 ha-1. A RCBD design was used for the experiment with three replications. The effect of variety was significant on all the yield components and yield except plant height. Prodip gave the highest grain yield (3.67 t ha-1) followed by Bijoy (3.45 t ha-1) and Shatabdi (3.28 t ha-1). Yield and yield components of wheat were significantly influenced by different levels of phosphorus. The highest grain yield (4.47 t ha-1) was recorded from P4 (120 kg P2O5 ha-1) and the lowest one (2.43 t ha-1) from the control treatment. The highest grain yield (4.80 t ha-1) was obtained from Prodip at 120 kg P2O5 ha-1 and the lowest one (2.3 t ha-1) was found in Shatabdi at control treatment. The results suggest that the combination of V3P4 (Prodip with 120 kg P2O5 ha-1) is the best for obtaining higher yield of wheat.

scholarly journals A study in the rat of the interaction between the effects of calcium and phosphorus content of the diet at two different levels and the presence or absence of vitamin D

1966 ◽  
Vol 20 (1) ◽  
pp. 55-60 ◽  
Author(s):  
R. B. Harrand ◽  
R. M. Green ◽  
R. L. Hartles
Keyword(s):  
Vitamin D ◽  
Significant Interaction ◽  
Phosphorus Content ◽  
Incisor Tooth ◽  
Final Body Weight ◽  
Free Weight ◽  
Weanling Rats ◽  
Two Factors ◽  
Calcium And Phosphorus ◽  
Different Levels

1. Four groups of weanling rats were maintained on diets containing either 0.12% or 0.24% of both calcium and phosphorus, in the presence and absence of added ergocalciferol. 2. Increase in mineral intake or the provision of vitamin D increased the final body-weight, with a significant interaction between the two factors. 3. Serum Ca and P concentrations were raised significantly by both the vitamin and the increase in mineral intake without signi ficant interaction. 4. Measurements were made of bone and tooth weights and ash values and of the length of the humeri. For only two measurements was there any interaction between the effect of vitamin D and increase in mineral intake, namely the length of the humeri, and their ash values expressed as a percentage of the dry fat-free weight. 5. It is concluded that in relation to the amount of mineral deposited, the incisor tooth is more resistant to nutritional stress than is the bone.

scholarly journals The roles of standing genetic variation and evolutionary history in determining the evolvability of anti-predator strategies

2014 ◽  
Author(s):  
Jordan Fish ◽  
Daniel R O'Donnell ◽  
Abhijna Parigi ◽  
Ian Dworkin ◽  
Aaron P Wagner
Keyword(s):  
Genetic Variation ◽  
Evolutionary History ◽  
Relative Importance ◽  
Digital Evolution ◽  
Relative Ease ◽  
Evolutionary Response ◽  
Two Factors ◽  
The Face ◽  
Evolutionary Trajectories ◽  
Different Levels

Standing genetic variation and the historical environment in which that variation arises (evolutionary history) are both potentially significant determinants of a population’s capacity for evolutionary response to a changing environment. We evaluated the relative importance of these two factors in influencing the evolutionary trajectories in the face of sudden environmental change. We used the open-ended digital evolution software Avida to examine how historic exposure to predation pressures, different levels of genetic variation, and combinations of the two, impact anti-predator strategies and competitive abilities evolved in the face of threats from new, invasive, predator populations. We show that while standing genetic variation plays some role in determining evolutionary responses, evolutionary history has the greater influence on a population’s capacity to evolve effective anti-predator traits. This adaptability likely reflects the relative ease of repurposing existing, relevant genes and traits, and the broader potential value of the generation and maintenance of adaptively flexible traits in evolving populations.

scholarly journals Stevia (Stevia rebaudiana Bertoni ) responds to different levels of nitrogen and potassium fertilizers in loamy sand soil

2021 ◽  
Vol 8 (2) ◽  
Author(s):  
Khawla D. Gatie ◽  
Haitham A. Ali ◽  
Kareem H. Mohsen
Keyword(s):  
Stevia Rebaudiana ◽  
Potassium Sulfate ◽  
Area Index ◽  
Stevia Rebaudiana Bertoni ◽  
Loamy Sand Soil ◽  
Randomized Design ◽  
Two Factors ◽  
E Mail ◽  
Different Levels ◽  
Number Of Branches

"A study was conducted in Al-Seba Reserve / Basra Governorate to study the effect of nitrogen and potassium fertilization on growth of stevia plants during 2018-2019 agricultural season, in pots. A sandy mixture of soil was used and two factors were studied: the first factor was urea fertilizer with five levels of nitrogen (N0 0, N1100, N2150, N3 200, and N4 250 kg / ha) and the second factor was potassium sulfate with three levels of potassium (K0 0, K1 75 and K3150 kg/h( . The experiment was experimental factor using a complete randomized design (C.R.D) with three replications. The results showed a significant effect of adding nitrogen and potassium fertilizers and there interaction on: plant height, number of branches, leaf area index, and the treatment N3K2 gave the highest yield reached (1.27 tons. h-1), and N4K2 recorded a highest content of Rebaudioside A (53.26 ppm). *Part of Ph.D. thesis of the first author Corresponding author: E-mail([email protected]) Al- Muthanna University All rights reserved"

scholarly journals Effect of Biochar Application as a Soil Amendment on Growth and Yield of Sesame (Sesamumindicuml.)

2020 ◽  
Vol 22 (2) ◽  
pp. 113-127
Author(s):  
TS Roy ◽  
MT Rahaman ◽  
R Chakraborty ◽  
M Mostofa ◽  
MS Rahaman
Keyword(s):  
Plant Height ◽  
Seed Yield ◽  
Block Design ◽  
Growth And Yield ◽  
Randomized Complete Block Design ◽  
Stover Yield ◽  
Two Factors ◽  
Biological Yield ◽  
Number Of Leaves ◽  
Different Levels

The experiment was conducted to study the effect of biochar on growth and yield of sesame. In the experiment, the treatment consisted of three varieties, viz., V1 = BARI Til- 2, V2 = BARI Til-3 and V3 = BARI Til-4, and five levels of biocharviz., B0= control (no biochar application), B1= 2 t ha-1, B2= 4 t ha-1, B3= 6 t ha-1 and B4= 8 t ha-1. The experiment was laid out in two factors randomized complete block design (RCBD) with three replications.Variety, application of different levels of biochar and their interaction showed statistically significant variation in plant height, number of leaves plant-1at 55 and 80 DAS and at harvest, capsules plant-1, seeds capsule-1, 1000-seed weight, seed yield, stover yield, biological yield and harvest index.The highest plant height (70.34, 110.95 and 109.84 cm at 55 and 80 DAS and at harvest respectively), number of leaves plant-1 (80.47, 116.70 and 94.54 at 55, 80 DAS and at harvest, respectively), number of branches plant-1 (3.60), capsules plant-1(80.47), number of seeds capsule-1(56.02),seed yield(1.07tha-1)andharvestindex(36.46%)were observed in the variety BARI Til-4 cultivated with the application of biochar @ 6 t ha-1 (V3*B3) and the lowest one was observed in variety BARI Til-2 with no biochar application (V1*B0).Biochar is effective for increasing growth and yield of sesame. Bangladesh Agron. J. 2019, 22(2): 113-127

scholarly journals Testing the Efforts Model of Simultaneous Interpreting: An ERP Study

2017 ◽  
Author(s):  
Roman Koshkin ◽  
Yury Shtyrov ◽  
Alex Ossadtchi
Keyword(s):  
Working Memory ◽  
Neural Activity ◽  
Event Related Potential ◽  
Auditory Stimuli ◽  
Simultaneous Interpretation ◽  
Simultaneous Interpreting ◽  
Electrophysiological Evidence ◽  
Task Irrelevant ◽  
Different Levels

AbstractWe utilized the event-related potential (ERP) technique to study neural activity associated with different levels of working memory (WM) load during simultaneous interpretation (SI) in an ecologically valid setting. The amplitude of N1 and P1 components elicited by task-irrelevant tone probes was significantly modulated as a function of WM load but not the direction of interpretation. Furthermore, the latency of the N1 increased insignificantly with WM load. The P1 latency, however, mostly did not depend on either WM load or direction of interpretation. Larger negativity under lower WM loads suggests deeper processing of the auditory stimuli, providing tentative electrophysiological evidence in support of the Efforts Model of SI. Relationships between the direction of interpretation and median WM load are also discussed.

scholarly journals Event-Related Potential to Conscious and Nonconscious Emotional Face Perception in Females with Autistic-Like Traits

2020 ◽  
Vol 9 (7) ◽  
pp. 2306
Author(s):  
Vilfredo De Pascalis ◽  
Giuliana Cirillo ◽  
Arianna Vecchio ◽  
Joseph Ciorciari
Keyword(s):  
Event Related Potentials ◽  
Autism Spectrum ◽  
Event Related Potential ◽  
Autism Spectrum Quotient ◽  
Conscious Awareness ◽  
Adult Women ◽  
Occipital Region ◽  
Emotional Faces ◽  
Related Potentials ◽  
Emotional Face

This study explored the electrocortical correlates of conscious and nonconscious perceptions of emotionally laden faces in neurotypical adult women with varying levels of autistic-like traits (Autism Spectrum Quotient—AQ). Event-related potentials (ERPs) were recorded during the viewing of backward-masked images for happy, neutral, and sad faces presented either below (16 ms—subliminal) or above the level of visual conscious awareness (167 ms—supraliminal). Sad compared to happy faces elicited larger frontal-central N1, N2, and occipital P3 waves. We observed larger N1 amplitudes to sad faces than to happy and neutral faces in High-AQ (but not Low-AQ) scorers. Additionally, High-AQ scorers had a relatively larger P3 at the occipital region to sad faces. Regardless of the AQ score, subliminal perceived emotional faces elicited shorter N1, N2, and P3 latencies than supraliminal faces. Happy and sad faces had shorter N170 latency in the supraliminal than subliminal condition. High-AQ participants had a longer N1 latency over the occipital region than Low-AQ ones. In Low-AQ individuals (but not in High-AQ ones), emotional recognition with female faces produced a longer N170 latency than with male faces. N4 latency was shorter to female faces than male faces. These findings are discussed in view of their clinical implications and extension to autism.

The Nature and Role of Complexity in Simulation Performance

2014 ◽  
Vol 3 (1) ◽  
pp. 21-46 ◽  
Author(s):  
Paulo Figueiredo ◽  
Elisabeth Loiola
Keyword(s):  
Product Development ◽  
Online Game ◽  
System Dynamics Model ◽  
Dynamics Model ◽  
Simulation Performance ◽  
Complex Information ◽  
Two Factors ◽  
Development Pipeline ◽  
Different Levels

The objective of this study is to understand the nature and role of complexity in simulation performance. In order to do this, a system dynamics model of the product development pipeline was developed, and an online game based on that model was created. An experiment was run where subject made a series of decisions on one or two variables for many periods, with different levels of information available to them (attribute complexity). Hypotheses were proposed based on the literature. The results confirmed the hypotheses relating degree of difficulty to distance from optimality. Two factors adversely affected the subjects' performance: dealing with more complex information on performance (more than one attribute) and having to make more than one simultaneous decision, i.e. more than one decision per period. The latter condition was more detrimental to performance than the former.

Effects of Age and Level of Work Experience on Occurrence of Accidents

1995 ◽  
Vol 80 (3) ◽  
pp. 931-940 ◽  
Author(s):  
Jean-Marie Cellier ◽  
Hélène Eyrolle ◽  
Annick Bertrand
Keyword(s):  
Work Experience ◽  
Research Study ◽  
Age Groups ◽  
Food Sector ◽  
Two Factors ◽  
Different Levels

Results of a research study on the effects of age and work experience and their interaction on the occurrence of accidents in an agro-food sector are described. Three different levels of experience and six age groups were examined. Age and work experience significantly affected frequency and seriousness of accidents. A study of these two factors jointly shows that considerably higher rates of frequency and seriousness are found for the youngest and oldest subjects with low work experience. These analyses enable us to put forward several hypotheses concerning the mechanisms in the occurrence of accidents.

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