Whirligig Wonders
A farm machinery repairman, Vollis Simpson, created the magical, mechanical creations that became North Carolina’s official folk art. Known as “whirligigs,” the huge kinetic sculptures have been installed around the United States, but the largest collection is near the family farm in Wilson, North Carolina. Other installations include the American Visionary Art Museum in Baltimore and the […]
FEATURED TESTIMONIAL – “Great Course That Keeps You Engaged”
“I took Dr. Tom’s thermal/fluids PE prep course. Dr. Tom presents the prep course material personally. Starting from the first lesson, it’s obvious that Dr. Tom is a man that is extremely passionate about teaching. If you are serious about taking a PE and not wasting your time, I would recommend Dr. Tom’s Classroom. I […]
A New Way to Build and Insulate with Wood
Several scientists at the Nanjing Forestry University in China, as reported by the American Chemical Society’s Nano Letters publication, have created a new insulation material made of wood. The scientists connected nanocrystals of wood cellulose with silanes (silicon compounds) to create an aerogel foam that has a visible light reflectance of 96% and an emittance […]
Try DTC Courses Before You Buy for $50
With our Test Drive and Pay-As-You-Go options, you can try out our courses for only $50 before you buy the full course. We’re so sure you’ll like what you see that there’s no obligation beyond your initial purchase. “Just finished the intro and it was great! I was skeptical about subscribing to anything and was […]
Using the Fork in a Tree
Currently, when trees are harvested, the places where tree limbs fork are cut out and used for mulch or other low tech uses. Researchers at MIT are discovering that these forks in trees are actually extremely strong and have load carrying properties that cannot be duplicated even by processes like 3D printing. Dr. Caitlin Mueller, Associate […]
Researchers Create a Better Carbon Dioxide Filter
Scientists at the University of Delaware have developed a method to efficiently remove carbon dioxide from the air using technology from fuel cells and, in doing so, help solve a roadblock to adopting fuel cell technology. The research team work with hydroxide exchange membrane (HEM) fuel cells that convert hydrogen to water and produce electricity. […]
FEATURED TESTIMONIAL – “Worth Its Weight in Gold!”
“Dr. Tom’s Classroom is worth its weight in gold! After completing the 20-Week Course, I felt extremely confident and prepared walking into the exam. Using the methods taught by DTC, exam questions never felt overwhelming and I had all the tools required to quickly solve them. DTC does a fantastic job breaking down the overwhelming amount of […]
Start for Only $50 and Pay-As-You-Go
With our Pay-As-You-Go option, you can now try out our courses for only $50 before you buy the remaining course modules. We’re so sure you’ll like what you see that there’s no obligation beyond your initial purchase. Just buy the next course module when you’re ready for it – a nice way to spread out […]
Dog Saved After Drone Carrying Sausage Lures Her To Safety
We keep learning about new ways drones can be useful. In a recent dog rescue in England, the creative rescuers used a drone, with sausages attached, to lure a dog to safety and out of the way of a rising tide on mud flats. – Daniel Findley, DTC Engineering Economics Instructor PE Exam Prep That Works!Pay Up […]
New Ways to Turn Waste Heat into Electricity
Researchers at Penn State have developed a practical way to harness the energy from curved, hot surfaces and convert it to electricity. Devices known as thermoelectric generators have been around for some time. They use silicon and other compounds to convert heat into a small electric current. These devices have been mounted onto rigid metal […]
