Does Lecture Capturing Impact Student Performance and Attendance in an Introductory Accounting Course?

The study empirically examines the interplay between lecture capturing viewership, performance and attendance for students in the Middle Eastern country of Qatar. The sample consists of 254 students enrolled in an introductory accounting class either in the Fall semester or in the Spring semester. We show a weak positive relationship between lecture capturing and performance, especially in the presence of other variables such as GPA, attendance, gender and seniority. However, we do not find that lecture capturing reduces attendance. Actual performance results are contrasted with students' perception of the usefulness and effectiveness of lecture capturing. Survey responses reveal that, overall, students attribute a great deal of credit to this pedagogical resource. They stated that lecture capturing clarifies concepts discussed in class, assists in studying for exams, enhances exam results and increases interest in the course. However, the majority of low-performing students believe lecture capturing to be a substitute for attending traditional lectures.Scopu

Design of spill tube with features for controlling air bubble generated for aircraft applicaitons

In this spill tube research paper, an analytical model is to be created of the distribution of pressure of the air trapped in the spill tube system, where fuel transfer from the sealed tank to the adjacent tanks occurs. This research is a part of a large fuel tank research project. A series of experiments were performed in order to characterize the flow of fluid in the entire spill tube with tubes of different diameters. The experiments were based on a test matrix, and results were kept in increasing order so as to obtain a simple conclusion. Also, trends can be drawn in the form of analytical models that were based on the equations obtained from fluid mechanics books. The experiments performed per spill tube were of two types: first, 0% downstream quantity was taken, and second, 50% downstream quantity was taken. An analytical model was developed using Simulink on the completion of the test matrix. The equations implemented in Simulink were compared with the experimental data so as to ensure the accuracy of the presentation. For various bell mouth geometries, the pressure was optimized with respect to the input flow of mass

Heat transfer enhancement of vapor condensation heat exchanger

A typical vapor condensation condenser consists of two major heat transfer processes, i.e., vapor condensation and forced convection. In order to enhance heat transfer, the condensation heat transfer utilizing the porous medium is investigated, and at the same time, the elliptical pin fin effect on the forced convection of nanofluid studied. The forced convective heat transfer on nanofluids in an elliptical pin-fin heat sink of two different pin orientations is numerically studied by using a finite volume method. With increasing Reynolds number, the recirculation zones behind the pins increased. There were more recirculation zones for the pins with different angular orientations than for pins with the same angular orientation. It is observed that the Nusselt number for the pins with different angular orientations was higher than that for pins with the same angular orientation. The results show that with increasing volume fraction of nanoparticles and angular orientation of pins for a given Reynolds number, Euler and Nusselt numbers as well as overall heat transfer efficiency increase. The non dimensional mass, momentum and energy equations based on non dimensional pressure, temperature, heat capacity, capillary, and bond numbers are developed for the vapor condensation occurring in the porous medium. The volumetric viscous force for the flow is described by Darcy's law. For the microscopic interfacial shear stress, a permeability term that relates flow rate and fluid physical properties (i.e. viscosity) to pressure gradient K[subscript l]=[mu][subscript l]/[subscript l]p[superscript l] is implemented. The effects of permeability, porosity, and effective pore radius parameters on porous medium performance are introduced. The occurrence of thin liquid film inside pores is addressed and the Laplace-Young equation is depicted. In calculations the Darcy-Ergun momentum relation is implemented which provide accurate means to determine the capillary performance parameters of porous medium. The dimensionless thicknesses of the two-phase and liquid regions and embodiment of unique characteristics based on the total thermal diffusivity and absolute permeability are depicted. Therefore, analyses of the phase change and two-phase flow are made by defining regions, over which appropriate approximations are made.Includes biblographical reference

Hate speech toward youngsters in online media

The 21st century has come and is ahead of us, presenting fast changes in people's ways to interact while witnessing massive progress in media and communication. Generation Z, born in 1995, has by now become part of our societies' young workers force at a time when the internet was already well installed. Their progeny, the alpha generation (born after 2010), is part of an ultra-connected world, their parents have been documenting their lives from early birth. In 2020, when the mondial pandemia started spreading, it became a worldwide urge and need to communicate online. To confront the massive societal transformations, education may be getting late raising voices about these virtual relationships and interactions. How does hate speech appear and spread in these conditions? Where to set boundaries when the “ghost is in the wire” and may remain anonymous? Who should we turn to, who is responsible for social media? What are the consequences of mental health? Eventually, which solutions can we, youth workers, implement to support youngsters and prevent hate speech from raising? Those are the questions we wish to investigate

Survey of Platforms for Massive IoT

Internet of things (IoT) becomes a prominent technology in our world. It is enabling the connection between the objects (the “things”) and the backend systems via the Internet. Everyday objects can become connected and smart. It has been adopted in different areas and applications such as smart cities, smart agriculture, smart healthcare, smart manufacturing, and others. Moreover, IoT platforms are currently growing up into the market. Each platform provides valuable and specific services and features. This paper presents a survey on IoT platforms, discussing their architectures and fundamentals of IoT building elements and communication protocols between them. The aim of this paper is to help the reader choose a suitable and adequate IoT platform for own demands in the huge number and variety of platforms available. This survey provides a comprehensive view of the components and features of the state-of-the-art IoT platforms

Simulation of fuel system with features for controlling air bubble generated for aircraft application

Title from PDF of title page (University of Missouri--Columbia, viewed on May 30, 2013).The entire thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file; a non-technical public abstract appears in the public.pdf file.Thesis advisor: Dr. Sherif El-GizawyIncludes bibliographical references.M. S. University of Missouri--Columbia 2012."May 2012"[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT REQUEST OF AUTHOR.] In this spill tube project an analytical model of the distribution of pressure of the air trapped in the siphoning tube system, where fuel transfer from sealed tank to the adjacent tanks occurs is to be created. This research is a part of large fuel tank research project and this is being sponsored by Boeing Company. A series of experiments were performed in order to characterize the flow of fluid in the entire spill tube with different diameters. The experiments were based on the test matrix that was being provided by Boeing, these were kept in increasing order so as to obtain simple conclusion and trends can be drawn in the form of analytical model that were based on the equations obtained from the fluid mechanics books. The experiments performed per spill tube were of two types first in which 0% downstream quantity were taken and second in which 50% downstream quantity were taken. The analytical model was developed using Simulink on the completion of the test matrix. The equations implemented in Simulink were compared with the experimental data so as to ensure the accuracy of the presentation. For various bell mouth geometries, pressure was optimized with respect to the input flow of mass

A Novel Approach to Enhance the Energy Efficiency of a NOMA Network

Spectral efficiency is crucial for implementing 5G cellular networks and beyond. Non-orthogonal multiple access (NOMA) is a promising scheme to enhance efficiency. This paper introduces two improvements that will further enhance the channel capacity using the NOMA algorithm. We first introduce a novel algorithm, the User Sub-Channel Fair Matching Algorithm (USFMA), by applying a new sub-channel sorting and compensations scheme and then benefiting from the well-known Hungarian algorithm to allocate users to each sub-channel in a way that guarantees an optimum overall system performance. Then, for per sub-channel power allocation, we convert the non-convex objective function into a convex sub-problem using the concave–convex procedure (CCP) by converting the objective function into convex sub-problems and using the successive convex approximation to solve the convex sub-problems to find effective sub-optimal solutions. We have built a MATLAB simulation cellular environment to evaluate and compare the system performance with other known schemes. The results are promising and showed significant improvements compared to the other capacity and energy efficiency schemes