Computational Study of Laminar Separation Bubble Development over Supersonic Airfoils at Subsonic Speeds

Laminar Separation Bubbles (LSBs) are regions of separated flow that start near the leading edge of an airfoil and reattach further down the airfoil surface. These regions of separation can appear at low angles of attack and can grow significantly as the angle of attack is increased heavily influencing the flow characteristics over the airfoil. Research on this topic is driven by the supersonic business jet industry which has a particular interest in this type of research due to performance requirements in both the subsonic and supersonic flight regimes. This manuscript is focused on the flow developments near the sharp leading edge of supersonic airfoils and their influence on aerodynamic performance at low subsonic speeds. Computational Fluid Dynamics was utilized to show how LSB formation, size, and shape are dependent on the turbulence model chosen and the level of free-stream turbulence present in the flow. Two turbulence models were investigated, the Spalart-Allmaras and the Menter\u27s SST. The LSB modeled by the Spalart-Allmaras turbulence model was consistently longer than the LSB modeled by the Menter\u27s SST turbulence model. Both models verified the LSB dependence on the Reynolds and Mach number of the flow

High Quality, Low Cost Egg Incubator for BIC Church in Choma, Zambia

The Egg Incubator team is partnering with the Brethren in Christ Church located in Choma, Zambia to design a high-quality, low-cost chicken egg incubator to supply the pastors and church members with a means of food and income. The design will need to take into account the accessibility and cost of the tools and materials. The current prototype features separate heating and humidity systems, a control system to maintain a set temperature and humidity, and tilting egg racks. The heating system consists of two stovetop coils to produce heat and a fan to transfer it to the air. The humidifier utilizes an atomizer in a pan of water to create a mist that mixes with the hot air to create humidity. The control system uses a proportional integral derivative controller (PID) to keep the temperature at 37 ± 1 °C and the humidity at 60–70%. The egg racks are tilted by a motor that runs every 6 hours to prevent the embryos from sticking to the shell. With a fully functioning prototype, the team has begun to incubate 60 real fertilized eggs. During the 21-day incubation process, a final prototype iteration is being designed and will be built on-site in Zambia in May 2022. Funding for this work provided by The Collaboratory for Strategic Partnerships and Applied Research.https://mosaic.messiah.edu/engr2022/1004/thumbnail.jp

Blockchain Technology: Investing in a National EMR Strategy

Improving the efficiency and sustainability of Canada’s healthcare system is currently being prioritized by the federal government. In order to achieve this, government and non-government stakeholder collaboration will be required to improve integration, universality, and equity for all populations throughout the country. Although technological innovations pose certain risks, investing in health technologies plays a major role in improving service delivery and cost-saving within healthcare. Canada has historically had a relatively low use of electronic medical records (EMR’s) in comparison to other high-income countries - which appears to be partially due to inefficiencies within the fragmented systems throughout Canada. Improving the current EMR infrastructure has the potential to save our country substantial amounts of money, improve information transfer for patients and practitioners, and enhance the overall quality of medical care Canadian citizens receive. There has been mention of developing a national EMR strategy by various organizations, including the Canadian Medical Association. Blockchain technology appears to have many desired characteristics for developing a comprehensive national EMR strategy to support the needs of our universal healthcare system. This is due to the fact that it is a secure platform to store huge amounts of information and make data transfers between a diverse group of stakeholders. It is believed that blockchain can provide a unique framework upon which a national data system can be built

Thigh-length compression stockings and DVT after stroke

Controversy exists as to whether neoadjuvant chemotherapy improves survival in patients with invasive bladder cancer, despite randomised controlled trials of more than 3000 patients. We undertook a systematic review and meta-analysis to assess the effect of such treatment on survival in patients with this disease