Electronic structure methods | Electronic band structures
In solid-state physics, the tight-binding model (or TB model) is an approach to the calculation of electronic band structure using an approximate set of wave functions based upon superposition of wave functions for isolated atoms located at each atomic site. The method is closely related to the LCAO method (linear combination of atomic orbitals method) used in chemistry. Tight-binding models are applied to a wide variety of solids. The model gives good qualitative results in many cases and can be combined with other models that give better results where the tight-binding model fails. Though the tight-binding model is a one-electron model, the model also provides a basis for more advanced calculations like the calculation of surface states and application to various kinds of many-body problem and quasiparticle calculations. (Wikipedia).
Scientists tie tightest knot ever
New molecular knots like this one could mean stronger, more flexible polymers. Learn more: http://scim.ag/2jvPqz5
From playlist Materials and technology
This knot is very useful for adjusting tie downs quickly and easily. For example, a tarp could be held down by a series of these knots and be made very tight so the wind cannot make it rise, and easily be removed simply by sliding the knots later. A taut line knot is also used to keep larg
From playlist Practical Projects & Skills
Why do shoelaces untie themselves?
Failure to stay knotty is a two-stage process according to a new study of lace mechanics. Learn more: http://scim.ag/2oVypF9
From playlist Materials and technology
This step by step guide demonstrates tying 15 types: 00:36 Overhand 01:22 Square 02:36 Figure Eight 03:40 Bowline, 05:29 Running 06:19 Half, 07:45 Timber, 09:42 Rolling, 10:43 Clove Hitches 11:30 Cat's Paw 12:58 Single, 14:40 Double Sheet or Becket Bends 15:30 Fisherman's, 17:09 Doubl
From playlist How To Tutorials
The inner-workings of ski bindings are shown through the manufacturing process. The bindings are precisely constructed to hold fast during operation, yet release during an accident. | http://www.sciencechannel.com/tv-shows/how-its-made/ Catch HOW IT'S MADE Thursdays at 9/8c on Science! W
From playlist How It's Made
Tight or release orange nut for clamping or repositioning green bar.
From playlist Mechanisms
Lecture 3D - Lifting with a Pulley
Here is what pulleys are good for. They can apply the tension force multiple times for a "mechanical advantage". In this problem we go through the tensions and weights, and think about the effect on motion.
From playlist PHYS 125 | Forces
Loose the screw for moving the stopper to new position and then tighten it. The stopper is kept immobile by wedge mechnism.
From playlist Mechanisms
Introduction to Solid State Physics, Lecture 6: One-dimensional Tight Binding Model for Electrons
Upper-level undergraduate course taught at the University of Pittsburgh in the Fall 2015 semester by Sergey Frolov. The course is based on Steven Simon's "Oxford Solid State Basics" textbook. Lectures recorded using Panopto, to see them in Panopto viewer follow this link: https://pitt.host
From playlist Introduction to Solid State Physics
Student Video: Tight Binding Model
MIT RES.3-004 Visualizing Materials Science, Fall 2017 Speaker: Shixuan Shan View the complete course: https://ocw.mit.edu/RES-3-004F17 YouTube Playlist: https://www.youtube.com/playlist?list=PLUl4u3cNGP62EJXwSgoVRfh1tEiSc01bh This video briefly introduces the theoretical basics of the ti
From playlist MIT RES.3-004 Visualizing Materials Science, Fall 2017
Introduction to Solid State Physics, Lecture 11: Band Structure of Electrons in Solids
Upper-level undergraduate course taught at the University of Pittsburgh in the Fall 2015 semester by Sergey Frolov. The course is based on Steven Simon's "Oxford Solid State Basics" textbook. Lectures recorded using Panopto, to see them in Panopto viewer follow this link: https://pitt.host
From playlist Introduction to Solid State Physics
Rima Chatterjee - Knots and links in overtwisted manifolds
38th Annual Geometric Topology Workshop (Online), June 15-17, 2021 Rima Chatterjee, Louisiana State University Title: Knots and links in overtwisted manifolds Abstract: Knot theory associated to overtwisted manifolds are less explored. There are two types of knots/links in an overtwisted
From playlist 38th Annual Geometric Topology Workshop (Online), June 15-17, 2021
Bourgeois contact structures: tightness, fillability and applications. - Agustin Moreno
Symplectic Dynamics/Geometry Seminar Topic: Bourgeois contact structures: tightness, fillability and applications. Speaker: Agustin Moreno Affiliation: University of Augsburg Date: Monday, October 7 More videos on http://video.ias.edu
From playlist Mathematics
Physics - Mechanics: Ch 17 Tension and Weight (1 of 11) What is Tension?
Visit http://ilectureonline.com for more math and science lectures! In this video I will explain what is tension and how to calculate tension using the free-body diagram. Next video in this series can be seen at: https://youtu.be/BxUhaktD8PA
From playlist PHYSICS MECHANICS 1: INTRO, VECTORS, MOTION, PROJECTILE MOTION, NEWTON'S LAWS
Quantum Transport, Bonus: Introduction to Kwant
Speaker: Sergey Frolov, University of Pittsburgh; Kwant, a python package for performing quantum transport numerics based on tight binding models is introduced. For more information see http://kwant-project.org
From playlist Quantum Transport
Intestinal Permeability: the Bacterial link to Aging, Brain Barrier Dysfunction & Metabolic Disorder
The intestinal barrier serves as a gatekeeper to the human body. The loss of the health and integrity of this barrier influences multiple aspects of human health – including cardiometabolic function, neurological health, behavior, and more – in surprising and possibly unexpected ways. One
From playlist Presentations
Introduction to Solid State Physics, Lecture 13: Graphene and Carbon Nanotubes
Upper-level undergraduate course taught at the University of Pittsburgh in the Fall 2015 semester by Sergey Frolov. The course is based on Steven Simon's "Oxford Solid State Basics" textbook. Lectures recorded using Panopto, to see them in Panopto viewer follow this link: https://pitt.host
From playlist Introduction to Solid State Physics
Non-standard Contact Structures on Spheres and Applications - Agustin Moreno
Special Joint IAS/Princeton University Symplectic Geometry Seminar Topic: Non-standard Contact Structures on Spheres and Applications Speaker: Agustin Moreno Affiliation: Member, School of Mathematics Date: February 13, 2023 In this talk, I will describe the construction of contact struc
From playlist Mathematics
Michael Weinstein: Dispersive waves in novel 2d media; Honeycomb structures, Edge States ...
Abstract: We discuss the 2D Schrödinger equation for periodic potentials with the symmetry of a hexagonal tiling of the plane. We first review joint work with CL Fefferman on the existence of Dirac points, conical singularities in the band structure, and the resulting effective 2D Dirac dy
From playlist Partial Differential Equations
Rope Trick for my neighborhood
During my show, a rope is spotted in my sleeve. I pull it...
From playlist My Magic