The document proposes a new method for detecting leakage current in bipolar junction transistors. It describes how leakage current increases over time as transistors age and degrade. It then presents a testing prototype that measures the voltage drop across a transistor under test to calculate its leakage current. The prototype applies a 300V supply to the transistor through a 1k立 resistor. It then measures the voltage and uses Ohm's law to calculate the leakage current in 亮A. Testing several transistors showed some with negligible leakage current differences, while others exceeded the maximum permissible 1亮A leakage, identifying them as faulty. The method provides an easy way to measure transistor leakage current for quality control.
The document proposes a new method for detecting leakage current in bipolar junction transistors. It describes how leakage current increases over time as transistors age and degrade. It then presents a testing prototype that measures the voltage drop across a transistor under test to calculate its leakage current. The prototype applies a 300V supply to the transistor through a 1k立 resistor. It then measures the voltage and uses Ohm's law to calculate the leakage current in 亮A. Testing several transistors showed some with negligible leakage current differences, while others exceeded the maximum permissible 1亮A leakage, identifying them as faulty. The method provides an easy way to measure transistor leakage current for quality control.
Teacher's Kit for Interactive Journalism by Juliana Ruhfusjulianaruhfus
油
Learn how to conduct an interactive investigation on environmental crimes. Recommended for journalism educators interested in fact-checking and verification practices.
Based on the Pirate Fishing interactive investigation by Juliana Ruhfus at http://www.aljazeera.com/piratefishing
- EBImage is an image processing and analysis toolbox for R that was developed for segmenting cells and extracting quantitative descriptors
- It allows users to read images, apply filters like thresholding and morphological operations, label features, and extract statistics
- Filters like Gaussian blurring can be applied using structuring elements of varying sizes to smooth an image, while thresholding and morphological operations like openings and closings can be used to find edges and extract binary features for analysis
This document provides an introduction and overview of Phoenix, an web development framework built on top of Elixir. It discusses how Phoenix is similar to and different from Rails, including how models, controllers, routes and generators work. It also covers creating a basic Phoenix project, authentication, changesets and validations. The goal is to help beginners get started with Phoenix by explaining core concepts and providing examples of common tasks.
Ruby's Influence over the Elixir Language - Ruby Day 2014Paolo Montrasio
油
This is my presentation of Elixir at Ruby Day 2014 in Roncade, Italy on September 26 2014.
Elixir is a functional language that runs over the Erlang virtual machine. Despite being Erlang inside, Elixir has a Ruby-like syntax, with do...end blocks and many intentional name collisions with Ruby's keywords and library methods. This makes it easier for Rubysts to pick it up than most other functional languages with arcane syntaxes. The talk will present elements of the Elixir language. We'll also look at the Phoenix web framework and how it was influenced by Ruby on Rails.
It's worth reading the speaker notes. They are in the original files at http://connettiva.eu/rubyday plus some tutorials and a link to a Phoenix project on my GitHub page.
CC-BY-SA 4.0 plus the original licenses of the images (in the notes)