The huge number of possible combinations of binary mixtures of alcohols and ionic liquids (ILs) make the exhaustive measurement of all these ystems impracticable requiring the use of a predictive model for their study. In this work, the predictive capability of COSMO-RS, a model based n unimolecular quantum chemistry calculations, was evaluated for the description of the liquid–liquid equilibri...

This study explores secondary school students’ competencies and motivation to engage in mathematical modelling (MM) tasks a Virtual Learning Environment (VLE). The is based theoretically on the didactical cycle sub-competencies required for its application, situated expectancy-value theory, VLEs’ design literature. Participants were 770 ninth graders who took part 5-day online summer camp, desi...

Acetaldehyde diethyl acetal (herein called acetal) is an important pollutant of anhydrous ethanol. Isobaric vapor–liquid equilibrium (VLE) ethanol–acetal binary system was measured using a vapor condensate and liquid circulation VLE still. The experimental data were correlated with Wilson, nonrandom two-liquid (NRTL), universal quasichemical (UNIQUAC) activity coefficient models, which found su...

Industrial revolution 4.0 in the 21st century, many countries have made their country's roadmaps to be able survive midst of dynamic changes. The century is marked by information that can accessed anyone, anytime and anywhere, computing or use robots, automation work done routinely communication becomes unlimited every aspect people's lives. purpose this research to, 1) find out feasibility dev...

Introduction: Medical schools face increasing challenges toaccommodate new health care needs. However, little has changedregarding the students’ education. In addition, educators face thechallenge of improving their teaching approach, making it suitableand effective for the new generation. The purpose of this work wasto describe and contextualize the application of active pedagogicalmethodologi...

Examines a project to integrate digital libraries and virtual learning environments (VLE). Conducted a user needs analysis and evaluated three reading or resource list management systems including TalisList, Sentient Discover and an open source solution, Bookworm. Reports on the technical specification for the system, but also subsequent work to develop a rights management system and a ‘library...

In this paper, the vapor-liquid equilibrium (VLE) properties of polar and nonpolar fluids are modeled by the use of a statistically-based equation of state (EOS). The equation of state used in this work is that of Ihm-Song-Mason (ISM) EOS. An alternative approach is to revise the isothermal integration on liquid. In this respect, a temperature-dependent revision factor b (T) is introduced to th...

The evaluation of virtual learning environments (VLEs) and similar applications has, to date, largely consisted of checklists of system features, phenomenological studies or measures of specific forms of educational efficacy. Although these approaches offer some value, they are unable to capture the complex and holistic nature of a group of individuals using a common system to support the wide ...