Shots Across No Man\u27s Land: A Response to Handgun Control, Inc.\u27s, Richard Aborn

In response to Richard Aborn\u27s article The Battle Over the Brady Bill and the Future of Gun Control Advocacy, Johnson argues that Aborn\u27s bad gun formula trivializes the Second Amendment, ignores issues vital to the gun control debate, and obfuscates what should ultimately need to be a choice between an armed citizenry or a disarmed one. Aborn\u27s article suggests no real changes and does not effectively advance the debate

Low cost underwater acoustic localization

Over the course of the last decade, the cost of marine robotic platforms has significantly decreased. In part this has lowered the barriers to entry of exploring and monitoring larger areas of the earth's oceans. However, these advances have been mostly focused on autonomous surface vehicles (ASVs) or shallow water autonomous underwater vehicles (AUVs). One of the main drivers for high cost in the deep water domain is the challenge of localizing such vehicles using acoustics. A low cost one-way travel time underwater ranging system is proposed to assist in localizing deep water submersibles. The system consists of location aware anchor buoys at the surface and underwater nodes. This paper presents a comparison of methods together with details on the physical implementation to allow its integration into a deep sea micro AUV currently in development. Additional simulation results show error reductions by a factor of three.Comment: 73rd Meeting of the Acoustical Society of Americ

Exploring the Division Algorithm in Euclidean Domains with Exploding Dots

We will give an overview of the representation of place value and arithmetic known as Exploding Dots and use this idea to explore the division algorithm. It is well-known that the ring of integers, the ring of polynomials, and the ring of Gaussian integers are all examples of Euclidean domains and therefore possess a division algorithm. Exploding Dots beautifully illustrates how one can perform division in any base and how this naturally leads us to division of polynomials. We will show how this same idea of having a “base machine” can be used to perform division in the Gaussian integers. No prior knowledge is assumed, and anyone can play and be immersed in the realm of Exploding Dots