Evaluating Human Eye Features for Objective Measure of Working Memory Capacity

Eye tracking measures can provide means to understand the underlying development of human working memory. In this study, we propose to develop machine learning algorithms to find an objective relationship between human eye movements via oculomotor plant and their working memory capacity, which determines subjective cognitive load. Here we evaluate oculomotor plant features extracted from saccadic eye movements, traditional positional gaze metrics, and advanced eye metrics such as ambient/focal coefficient , gaze transition entropy, low/high index of pupillary activity (LHIPA), and real-time index of pupillary activity (RIPA). This paper outlines the proposed approach of evaluating eye movements for obtaining an objective measure of the working memory capacity and a study to investigate how working memory capacity is affected when reading AI-generated fake news

On the Efficient Calculation of a Linear Combination of Chi-Square Random Variables with an Application in Counting String Vacua

Linear combinations of chi square random variables occur in a wide range of fields. Unfortunately, a closed, analytic expression for the pdf is not yet known. As a first result of this work, an explicit analytic expression for the density of the sum of two gamma random variables is derived. Then a computationally efficient algorithm to numerically calculate the linear combination of chi square random variables is developed. An explicit expression for the error bound is obtained. The proposed technique is shown to be computationally efficient, i.e. only polynomial in growth in the number of terms compared to the exponential growth of most other methods. It provides a vast improvement in accuracy and shows only logarithmic growth in the required precision. In addition, it is applicable to a much greater number of terms and currently the only way of computing the distribution for hundreds of terms. As an application, the exponential dependence of the eigenvalue fluctuation probability of a random matrix model for 4d supergravity with N scalar fields is found to be of the asymptotic form exp(-0.35N).Comment: 21 pages, 19 figures. 3rd versio

Exploring The Effect of Online Course Design on Preservice Teachers’ Knowledge Transfer and Retention Through Learning Analytics

There is a vast amount of data collected on e-learning platforms that can provide insight and guidance to both learners and educators. However, this data is rarely used for evaluation and understanding the learning process. Hence, to fill this gap in the literature this study explored the effect of online course design on students’ transfer and retention of knowledge through learning analytics. The aim was to reveal study behaviours of participants over a short time while exploring their academic performance. Using a mixed method approach, this research is conducted in two different countries in a limited time. The results showed that the more times students visited the learning module and the longer these visits, the higher the students’ transfer knowledge scores in this module. Most importantly, the only variable found to be a significant predictor of students’ transfer learning outcome was the number of sessions in the module website

Autologous Pericardial Band for Tricuspid Valve Annuloplasty: Midterm Results

Background: Even though tricuspid regurgitation (TR) is a frequent cardiac valve disorder, and tricuspid valve annuloplasty (TVA) has been evolved to manage TR for more than 50 years, there is still a substantial controversy regarding the best durable method for TVA. We reported our midterm (3 years) outcomes of TVA using autologous pericardial (AP) band comparing it with DeVega annuloplasty for the management of functional TR. Methods: Between January 2017 and November 2018, about 175 cases with moderate or more TR underwent TVA as a part of primary left-sided valve replacement surgery. Autologous pericardial (AP) TVA was performed in 100 patients, and DeVega TVA in 75 patients. Results: Both groups are comparable as regards preoperative characteristics. Immediate postoperatively, regarding NYHA class, degree of TR, ejection fraction, and pulmonary artery systolic pressure, there was a marked improvement within the 2 groups compared to the preoperative values, without a significant difference between both groups. 94% of patients completed the follow-up period. In hospital death was 2% in the AP group, and 1% in the DeVega group. The AP group showed a marked improvement in the mean degree of TR at the same follow-up period compared to the DeVega group, 12% patients of the AP group and 21% patients of the De Vega group had 3+ or 4+ TR at 3 years postoperative follow up. There was a marked improvement in the Diastolic tricuspid annuloplasty diameter in the AP group compared to the DeVega group. There were 6.3% late deaths in our study. Conclusion:  TVA with an AP was more durable than the DeVega in avoiding postoperative TR progression on the midterm results