In the development of power electronic devices, more and more switch mode power supplies (SMPS) are used in various fields. SMPS transfer power from a DC or AC source to DC loads. And they have many advantages, such as high conversion efficiency, low energy loss, and lighter weight than linear power supplies. However, switching current in SMPS can cause electrical noise problems and it may have a poor power factor. To solve these problems, gallium-nitride (GaN) based Totem-Pole power factor correction (PFC) has been used.
Crystallization is used to produce solid form drugs in the pharmaceutical industry. It is important to understand how operating conditions affect the crystallization process because these conditions will impact product quality. The purpose of this project is to develop a computational model that can predict crystallization process performance over a wide range of conditions. The model will help Solid State Pharma Inc. to reduce the number of experiments necessary to optimize their crystallization processes.
When a transmission cable joint in an underground vault undergoes an electrical failure this event can result in a high energy event and trigger a shock wave. Rapid and extreme pressure build up inside a manhole can cause a 200kg vault cover launching out as a dangerous projectile, which is referred as manhole incidents. The safety and reliability evaluation of the power cable joint in an underground vault has always been challenging with quite complex electromagnetic-thermal-mechanical coupling field.
The Atlantic Publisher’s Digital Youth Engagement Strategy (APDYES) is a partnership of Atlantic Canadian publishers, designed to digitally expand the reading experience of today’s “digital natives,” or youth.
The IISD-Experimental Lakes Area is currently examining the effectiveness of minimally invasive shoreline methods for cleaning spilled oil. Non-invasive methods are needed to eliminate disturbance to sensitive riparian areas that occur with typical cleanup operations. Non-invasive methods protect sensitive shoreline habitats by minimizing physical contact and they can also speed oil removal after a spill and restore ecosystems more effectively.
The project focuses on the evaluation of the arsenic-containing glass material that the new Dundee Sustainable Technologies (DST) process produces. The idea is to evaluate the stability of arsenic in the material, and through a feedback process to DST improve the quality of the process for the production of arsenical materials.
The research focuses on the crucial needs for the optimization of biofuel production process. It supports the Canadian energy and environment sectors which are seriously searching for more efficient process, targeting the increasing concern of the society with respect to the fossil fuel energy resources depletion and environmental footprints.
This research project will develop an intelligent UAV (unmanned aerial vehicle) system, which is capable of autonomous navigation, for the inspection of power lines and utility. The automated inspection is based on the technologies of computer vision and artificial intelligence. The UAV flies autonomously over the infrastructure capturing the images with high-definition RGB camera and thermal camera. The acquired image data are processed with algorithms powered by artificial intelligence for the condition assessment of the infrastructure.
The evaluation of mining projects depends on modern computational techniques. There is a demand for increasingly sophisticated techniques, due to environmental considerations and the drive toward increasingly complex ores. Without these techniques, projects may be wrongfully held back or abandoned, leading to severe socioeconomic consequences in the surrounding communities. Conversely, mining projects may be wrongfully approved, causing unfortunate environmental and socioeconomic consequences.
Fruit and vegetables are highly perishable commodities due to their high moisture content (around 80%) that deteriorate over a period of time if improperly handled. The uneaten food largely ends up in landfills, where it contributes to accumulating waste and creates methane, a powerful greenhouse gas. To recover the food waste and generate new value streams it is essential to first stabilize the food and prevent deterioration or spoilage.
To decrease the moisture content of a material, drying is required. A lower moisture leads to a decrease in the free water available for microbial activity.