This article reviews recent evaluation studies of online learning communities to provide a systematic understanding of how such communities are evaluated. Forty-two representative studies were selected and categorized into a newly developed taxonomy of online learning community evaluations. This taxonomy is divided into four components: evaluation purpose, evaluation approach, measures for eval...

Acid mine drainage (AMD) is the outflow of acidic water from metal mines or coal mines. When exposed to air and water, metal sulfides from the deposits of the mines are oxidized and produce acid, metal ions and sulfate, which lower the pH value of the water. An open limestone channel (OLC) is a passive and low cost way to neutralize AMD. The dissolution of calcium into the water increases the p...

To establish a collaborative OLC, the sense of social presence must be created. Social presence is one of the most important factors that helps people actively collaborate, thus increasing sense of belonging and social cohesion to the community. However, the creation of social presence in an OLC can be problematic due to the limitations of the communication media used. Lean media such as asynch...

Variability management of process models is a major challenge for Process-Aware Information Systems. Process model variants can be attributed to any of the following reasons: new technologies, governmental rules, organizational context or adoption of new standards. Current approaches to manage variants of process models address issues such as reducing the huge effort of modeling from scratch, p...

Lithium-ion capacitors (LICs), potentially bring together the advantages of batteries and supercapacitors. For faradaic anodes, nanostructured carbonaceous materials hold immense potential, in contrast to graphite where limitations Li-ion diffusivity exist. Herein, onion-like carbons (OLCs), synthesized from Fe-BTC metal-organic framework (MOF), is implemented as LIC anode, owing its high charg...