tim As computers become powerful and solve more problems, the possibility that computers could evolve into a capability that could rise up against us and pose an existential threat is of increasing concern. After reading a recent book on artificial intelligence (AI), Superintelligence, Elon Musk recently said: I think we should be very careful about artificial … Read more
Tonight, I just finished Francis Collins’ book “The Language of God” where he lays out the basic facts of genetics and the human genome, denounces Creationism and rejects Intelligent Design theory, rebukes Richard Dawkins, and generally sets a tone for reasonableness between Christians and scientists. This is a lot of disjoint topics, and while he … Read more
Quick post, just to help others who might find themselves in a similar situation regarding a front-end loader washer with a door latch that doesn’t close Big trouble . . . door latch broke on our amana front end loader. First thing I do when I need to fix something is look for ownership so … Read more
The latest fundamental computer security vulnerability, termed Shellshock, was discovered by a vulnerability researcher Stephane Chazelas (a linux shell expert living in the UK) which allows for arbitrary code execution on linux or mac computers through creating a custom environment variable. If you haven’t already, you need to patch your system(s) and you might be … Read more
During my time on the red team, we continually discussed the role of matched filters in everything from GPS to fire control radars. While I’m having a blast at DARPA where I work in cyber, I wanted to review an old topic and put MATLAB’s phased array toolbox to the test. (Yes, radar friends this … Read more
This was much harder than it should have been. While this is the certainly the most trivial post on crypto-math on the webs, I wanted to share my MATLAB xor code in the hope that I save someone else’s time. It is a basic property of cryptography that a one time pad must be used … Read more
We are swimming in a sea of information. Without encryption this whole operation would be a very public event. Encryption enables our communications to be anonymous or secure and makes e-commerce and private communications possible. Because of this, I registered for Dan Boneth’s cryptography course. At this point, I’ve only watched one lecture, but I … Read more
From a one-star review on Amazon: The content was obvious and the tone was judgmental. The complete lack of nuance is painful. Apparently receiving an MD over 25 years ago makes this Dr. Laura-style author an expert in child psychology? Let’s leave the psychology topics to those professionally trained in that discipline. I’ve always enjoyed … Read more
If you ever have to replace your under the sink GE filter (specifically the GE GXULQR), be ready for a frustrating ride. It looks like this: You can find the manual here and the ge product page here. It is billed as the “Twist and Lock” Replacement Filter, the inside female hex socket sometimes rotates … Read more
It has been awhile since I’ve studied optimization, but gradient descent is always good to brush up on. Most optimization involves derivatives. Often known as the method of steepest descent, gradient descent works by taking steps proportional to the negative of the gradient of the function at the current point. Mathematically, gradient descent is defined … Read more