This thesis presents a Web-based Virtual Learning Environment (VLE) called the Education through Virtual Experience (EVE) Portal which supports eScience learning for schoolchildren. The VLE guides students and teachers in the production of collaborative research papers to summarize their inquirybased activities. This thesis details the formative evaluations carried out on the VLE and provides e...

In process simulation, reliable and accurate property estimation methods play an important role in the solution of various simulation problems where convergence is often traced to failures in the reliable predictions of physical and thermodynamic properties. Convergence and reliability of the simulation is heavily dependent on the fluid package selected. Predictions of phase equilibrium using v...

in this work, a more accurate prediction of liquid evaporation flux has been achieved. the statistical rate theory approach, which is recently introduced by ward and fang and exact estimation of vapor pressure in the layer adjacent to the liquid–vapor interface have  been used for prediction of this flux. firstly, the existence of an equilibrium layer adjacent to the liquid-vapor interface is c...

This study investigates the significance of Rogers’ Diffusion of Innovations (DOI) theory with regard to the use of a Virtual Learning Environment (VLE) at the Royal University of Bhutan (RUB). The focus is on different adoption types and characteristics of users. Rogers’ DOI theory is applied to investigate the influence of five predictors (relative advantage, complexity, compatibility, triala...

Designing User Interface (UI) has an important role in user satisfaction. Students working in Virtual Learning Environment (VLE), experience great difficulties and encounter consumes most of their time attempting to learn an incomplete system design by inexperienced UI designers. The VLE system may contain analytical function and features with poor UI facility, Hence the effective use of the sy...

The single-phase instability of high-pressure, steady, laminar counterflow diffusion flame is studied using the Vapor–Liquid Equilibrium (VLE) theory. a posteriori study focuses on identification potentially unstable regions emerging throughout full combustion states represented by high-pressure solution; specific emphasis placed middle branch solutions which are characteristic intermediary sta...

in this study, liquid-liquid extraction process in a kuhni extraction column was modeled and simulated. a non-equilibrium dynamic model was developed for modeling liquid-liquid extraction processes based on a rate-based model. the model equations are inclusive of partial and ordinary differential equations which were discretized in column height direction. the population balance model was used ...

Hydrogen (H2) is a clean fuel and key enabler of energy transition into green renewable sources method achieving net-zero emissions by 2050. Underground H2 storage (UHS) prominent offering permanent solution for low-carbon economy to meet the global demand. However, UHS complex procedure where containment security, pore-scale scattering, large-scale capacity can be influenced contamination due ...

A variety of hydrofluorocarbon (HFC) compounds, both as pure substances and mixtures, are being developed as alternative refrigerants to replace the exsting chlorofluorocarbons and hydrofluorocarbons which have been linked to stratospheric ozone depletion. The use ofHFC's in refrigeration systems will require new lubricants, and polyolesters are being widely promoted as the lubricant of choice ...

Accurate vapor-liquid equilibrium data have been obtained for ethyl acetate + 2-propanol and ethyl acetate + ethanol mixtures at 84.8 kPa, and the results are discussed thermodynamically. The vapor-liquid equilibrium data are correlated with redlich-Kister, Margules, Van-Laar and Ortega, equations the parameters and standard deviation of which are calculated and reported. The best correlati...