Collaborating Authors

Modular Combat Spinning Top (no support needed) #3DPrinting #3DThursday


Aravon shared this project on Thingivere! The spinning top is modular. You can easily design your own discs and tips. The default is three layers, upper disc, lower disc and the tip. The core diameter is 10mm.

Focuser for Canon 100-400 mm Lens #3DThursday #3DPrinting


Focuser for Canon 100-400 mm lens (and possibly other lenses with similar diameter) when used with astrophotography camera. The lens clamp inner diameter is 93.7 mm. You might need to rotate some of the parts in the slicer software before printing them. Please check the snapshot from Simplify3D above for the optimal parts placement on the print bed. I recommend printing the clamp separately and using a raft for that part only.

Cost Optimal Planning as Satisfiability Artificial Intelligence

We investigate upper bounds on the length of cost optimal plans that are valid for problems with 0-cost actions. We employ these upper bounds as horizons for a SAT-based encoding of planning with costs. Given an initial upper bound on the cost of the optimal plan, we experimentally show that this SAT-based approach is able to compute plans with better costs, and in many cases it can match the optimal cost. Also, in multiple instances, the approach is successful in proving that a certain cost is the optimal plan cost.

Radiology: Artificial Intelligence


A key challenge in health informatics is "interoperability": the ability to exchange information seamlessly across disparate information systems. One must understand the meaning of the information. Imagine someone gave you a spreadsheet about a large set of patients, including the maximal diameter of the infrarenal aorta recorded in a column labeled "Aorta." Most of the values are integers that range from 23 to 55, so you assume (correctly) that these represent the diameter of the aorta in millimeters. But one patient has a value of 0, and another has 99.

City Council Passed Ordinance to Protect Large Trees

U.S. News

Landmark trees are defined by the species and the diameter of the tree 4.5 feet (1.4 meters) above the ground. Most of the species in the ordinance are not protected if they have a diameter below 2.5 feet (0.75 meters).