Just a quick note on a very strange issue when updating a Windows 10 Pro virtual machine on Linux using VMware Workstation from a version 15 VM to version 16. Environment and Setup Each has the latest s/w release with all patches and updates applied. Linux Fedora 33 kernel 5.10.15–200.fc33.x86_64 VMware Workstation 16 Pro, version 16.1.0, […]
Sleep Option Disappears Running Windows 10 Pro Using VMware Read More »
VMware Workstation and Player won’t compile on a Linux system, e.g., Fedora 29, running the new kernel 5.0.3. I dug around and figured out how to patch the VMware kernel modules and it appears to work. So far. The patch of hostif.c could be better but I wanted to get this published ASAP. Update on
VMware Workstation/Player 15.0.3/4 and Linux kernels 5.0.3/4 Read More »
I’ve had several Fedora servers at AWS for years. I keep the servers updated with the latest releases of packages and Fedora versions, run with SELinux enforcing, etc. Back when I first created the servers we set up paravirtual (PV) servers which use PV-GRUB (a special boot loader) to start them. The problem I ran
Converting an AWS Linux PV Server to a HVM Server Read More »
Udactity has a Deep Learning course. One of the projects is to set up and train an image classifying convolutional neural network using TensorFlow. The tensors can get rather large (GB size). The computational requirements are such that if you want to play around with things, tear them apart and put them back together again
When I updated Fedora 20 some time (but many updates) ago my sound stopped working. I don’t exactly know which update caused the problem. I don’t play audio or watch video all that often on my laptop. I expected that a pending update would resolve the problem but after a few months I figure it’s not
Getting Fedora 20 Sound Working Again Read More »
PDP: A paradigm shift for NASA Space Shuttle Flight Design During my time working on the Space Shuttle I developed at NASA/Johnson Space Center a Parallel Distributed Processing (PDP) package to distribute tasks such as Space Shuttle trajectory simulations across the Unix workstation network we had at Rockwell Space Operations. The basic idea is very
NASA Parallel Distributed Processing Project Read More »
There are many different optimization algorithms and methods. The goal of an optimization algorithm is to analyze the response of a system by varying a set of inputs (“factors”), and determining the set of factors which yields the “best” responses. To a certain extent the choice of what method to employ depends on the system
Sequential Simplex Optimization Read More »
This project researched the application of Sequential Simplex Optimization and Experimental Design concepts to the problem of optimizing some of the target values used in the Space Shuttle first stage guidance subsystem. Shuttle first stage employs “open-loop” guidance, essentially flying an attitude profile based on current speed. I first found the optimum targeting values and
Optimized Space Shuttle 1st Stage Guidance Targets Read More »
Introduction to the C Programming Language As many books do, this started out as a set of notes for a class. I taught several C classes for the staff at Rockwell Space Operations in Houston when I worked on the Space Shuttle Program. What I wanted to do was to drive home that the engineers,
Introduction to the C Programming Language Read More »
Multi-Stage Monte Carlo Optimization Monte Carlo optimization has been a widely used optimization method for many years. It’s very easy to understand: For a set of factors (independent variables), randomly select values for each factor to make a set of inputs to the system and test the system response for each set. For example, referring
Multi-Stage Monte Carlo Optimization Read More »
