Solving Cubic Equations With Python
Introduction In algebra the student learns to find the roots of cubic equations using the Rational Root Theorem. Presented here is python code implementing each of the steps the student is taught. What is...
Category: General
OpenCv and Gstreamer on the Raspberry Pi 5
Introduction Some Preliminaries Test Camera and Software Download And Build OpenCv Building the Samples Running A Test First Working Example-C++ Second Working Example-C++ Third Working Example-Python3 Fourth Working Example-Gstreamer Final Note Introduction In the...
Slamtec RPLIDAR A1M8 Correct Wiring
Introduction The purpose of this note is to share my findings regarding incorrect pin definitions found in Figure 3-4 of “LM108_SLAMTEC_rplidarkit_usermanual_A1M8_v2.2_en.pdf”. The same incorrect pin definitions are also found in earlier versions of this...
Quantifying the Energy and Infrastructure Requirements for the Planned EV Transition
IEEE recently published a detailed 49 page study that demonstrates how staggering the challenge is for this transition that policy makers have created. Below are some straightforward calculations that quantify the scale of what...
Using Python To Make A Map With Accurate Longitude/Latitude Axes From The Database At OpenStreetMap.Org
Introduction In order to work with the map database at openstreetmap.org the website has extensive information and one can find very many software packages available for developers of different kinds of uses for maps....
Mobile, Battery Operated Weather Station Using BME280 Sensor and SSD1306 OLED Display
Introduction A recent post described the prototype, its software, and results of testing to determine how/if this weather station can be battery operated. That testing clearly demonstrated that two AAA cells in series will...
How Can An ESP8266 SSD1306 OLED/BME280 Sensor Weather Station Be Battery Operated?
Introduction This post describes a work-in-progress project wherein the title question had to be answered first. The goal is to make a simple device that can be taken anywhere and does not need a...
Jet Departures from Livermore Airport: Part 2. Six Weeks of Recorded Departures
Introduction This post is a continuation of the issue of jet noise at Livermore Airport that has been described elsewhere in this Blog. While the airport experiences noise complaints for both jet and non-jet...
Jet Departures from Livermore Airport: Study of Tracks and Altitudes
This post shows maps of actual departure tracks of jet traffic leaving LVK.
UVC Lamps, Part 1: Comparison of Models for Irradiance
Introduction Keitz model Beggs model Modest model Comparison of models Conclusion References Introduction When one deploys a UVC germicidal lamp for the purpose of disinfection, there are two fundamental relationships that need to be...
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