In computer programming, a weak reference is a reference that does not protect the referenced object from collection by a garbage collector, unlike a strong reference. An object referenced only by weak references – meaning "every chain of references that reaches the object includes at least one weak reference as a link" – is considered weakly reachable, and can be treated as unreachable and so may be collected at any time. Some garbage-collected languages feature or support various levels of weak references, such as C#, Java, Lisp, OCaml, Perl, Python and PHP since the version 7.4. (Wikipedia).
An introduction to the physics concept of frames of reference. The first in a series of videos on special and general relativity Let us know what you think of these videos by filling out our short survey at http://tinyurl.com/astronomy-pulsar. Thank you!
From playlist Special Relativity
What are frames of reference in physics?
What's a frame of reference and the two types? How can you tell? Watch and find out. This leads to a conundrum Einstein had about how light behaves in different frames of reference and led to a radical new way of thinking. That will be covered in subsequent videos See www.physicshigh.com
From playlist Kinematics
In this video, I define "inertial reference frame," "non-inertial reference frame," and "inertial force."
From playlist Intermediate Classical Mechanics
If macro laws and micro laws conflict, does that mean our understanding of physics is wrong?
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From playlist Science Unplugged: Physics
This video introduces similarity and explains how to determine if two figures are similar or not. http://mathispower4u.com
From playlist Number Sense - Decimals, Percents, and Ratios
What's the difference between OLD and ELDERLY?
If you're confused about when to use OLD and ELDERLY and OLDER and ELDER then in this video we explain everything. This is an English vocabulary lesson from LetThemTalkTV We go deeper If you like our videos subscribe here for more. http://www.youtube.com/user/letthemtalkparis?sub_conf
From playlist Use the right word - Useful English vocabulary
Higher Physics - in this video, I answer a question about the gravitational force between the Earth and a satellite in orbit above it. This is a good example of the trickier problem-solving questions you'll come across in Higher Physics. ---------------------------------------------------
From playlist Higher - Our dynamic Universe
Hindsight Bias in the Classroom – Why Learning Statistics is Harder Than it Looks (0-3)
Hindsight Bias is the inclination to see events that have already occurred, as being more predictable than they were before they took place. We tend to look back on events as being simple and something that we might have already known. Hindsight bias often occurs in statistics class when y
From playlist Statistics Course Introduction
Smart pointers - The Rust Book (part 57) chapter 14
I'm streaming every weekday morning on Twitch at https://www.twitch.tv/brookzerker. Please feel free to stop by and say hi! Links Rust book: https://doc.rust-lang.org/book/second-edition/ My code: https://github.com/BrooksPatton/learning-rust The Learning Wiki: https://github.com/BrooksP
From playlist Rust Book
Introduction to Rust - Part 13: Reference Counting and Interior Mutability
This is the 13th in a series of videos that cover, step by step, learning to code using the Rust programming language. In this video we'll cover Reference Counting and Interior Mutability. 0:00 - Introduction 0:23 - Directed Acyclic Graph 1:37 - Reference-counted heap pointer 2:40 - Buil
From playlist Introduction to Programming with Rust
Unified Charge Vectors (UCV Theory) by Noam Why. Grand unification of electroweak and strong forces.
A new breakthrough in theoretical physics! UCV theory is a grand unification of electroweak and strong forces based on a new idea called Unified Charge Vectors. The theory was developed by Noam Why and was first published in January 2021. Original paper: https://independent.academia.edu/W
From playlist Summer of Math Exposition Youtube Videos
Easy Rust 117: Some functions for reference counters
A few functions for reference counters, plus what strong count means. From this chapter: https://dhghomon.github.io/easy_rust/Chapter_45.html #rustlang Want to buy me a coffee? Do it here: https://www.buymeacoffee.com/mithridates
From playlist Easy Rust / Rust in a Month of Lunches: bite-sized Rust tutorials
Bob Lee, CTO Square, Inc. talks about the Java community
Bob Lee, CTO of Square, interviewed here by O'Reilly Media at Oracle's OpenWorld/JavaOne 2011 discusses his talk on Java references and his general thoughts on the direction and health of the Java community.
From playlist Java for Radar
PROG2006: Rust - Smart Pointers and Collections
Join us as we talk about collections and smart pointers in Rust. Recorded as part of the PROG2006 course.
From playlist PROG2006 - Programming
Special Relativity: 2 - Spacetime Diagrams
An introduction to spacetime diagrams which are a valuable tool used to understand special relativity. The second in a series on special and general relativity. Let us know what you think of these videos by filling out our short survey at http://tinyurl.com/astronomy-pulsar. Thank you!
From playlist Special Relativity
(IC 4.8) Optimality of Huffman codes (part 3) - sibling codes
We prove that Huffman codes are optimal. In part 3, we show that there exists a "sibling code". A playlist of these videos is available at: http://www.youtube.com/playlist?list=PLE125425EC837021F
From playlist Information theory and Coding
Science in a Sentence: Condensed Matter Physics
Strong magnets using small samples produce big science. #ScienceInASentence #NationalMagLab #Science
From playlist Sciences in a Sentence
François Métayer: Homotopy theory of strict omega-categories and its connections with...Part 1
Abstract: In the first part, we describe the canonical model structure on the category of strict ω-categories and how it transfers to related subcategories. We then characterize the cofibrant objects as ω-categories freely generated by polygraphs and introduce the key notion of polygraphic
From playlist Topology