Tags: materials

Online Presentations (41-60 of 88)

  1. Illinois PHYS 466, Lecture 5: Interatomic Potentials

    18 Feb 2009 | Contributor(s):: David M. Ceperley

    Interatomic Potentials Before we can start a simulation, we need the model! Interaction between atoms and molecules is determined by quantum mechanics But we don’t know V(R)!Content: The electronic-structure problem Born-Oppenheimer (1927) Approximation Semi-empirical potentials Atom-Atom...

  2. Illinois ECE 598EP Lecture 3.1 - Hot Chips: Electrons and Phonons

    17 Feb 2009 | | Contributor(s):: Eric Pop, Omar N Sobh

    Electrons and Phonons

  3. Illinois Center for Cellular Mechanics: Discovery through the Computational Microscope

    11 Feb 2009 | | Contributor(s):: Klaus Schulten

    Computational MicroscopeAll-atom molecular dynamics simulations have become increasingly popular as a toolto investigate protein function and dynamics. However, researchers are usuallyconcerned about the short time scales covered by simulations, the apparentimpossibility to model large and...

  4. Illinois PHYS 466, Lecture 4: Molecular Dynamics

    05 Feb 2009 | | Contributor(s):: David M. Ceperley

    Molecular Dynamics What to choose in an integrator The Verlet algorithm Boundary Conditions in Space and time Reading assignment: Frenkel and Smit Chapter 4 Content: Characteristics of simulations The Verlet Algorithm Higher Order Methods? Quote from Berendsen Long-term stability of Verlet...

  5. Illinois ECE 598EP Lecture 1 - Hot Chips: Atoms to Heat Sinks

    29 Jan 2009 | | Contributor(s):: Eric Pop

    IntroductionContent: The Big Picture Another CPU without a Heat Sink Thermal Management Methods Impact on People and Environment Packaging cost IBM S/390 refrigeration and processor packaging Intel Itanium and Pentium 4packaging Graphics Cards Under/Overclocking Environment A More Detailed Look...

  6. Illinois PHYS 466, Lecture 3: Basics of Statistical Mechanics

    31 Jan 2009 | | Contributor(s):: David M. Ceperley

    Basics of Statistical Mechanics Review of ensembles Microcanonical, canonical, Maxwell-Boltzmann Constant pressure, temperature, volume,… Thermodynamic limit Ergodicity (see online notes also) Reading assignment: Frenkel and Smit pgs. 1-22.Content: The Fundamentals according to Newton “Molecular...

  7. Illinois MatSE 280 Introduction to Engineering Materials, Lecture 9: Mechanical Failures

    09 Jan 2009 | | Contributor(s):: Duane Douglas Johnson, Omar N Sobh

    Mechanical Failure: temperature, stress, cyclic and loading effectISSUES TO ADDRESS... How do cracks that lead to failure form? How is fracture resistance quantified? How do the fracture resistances of the different material classes compare? How do we estimate the stress to fracture? How do...

  8. Illinois PHYS 466, Lecture 1: Introduction

    28 Jan 2009 | | Contributor(s):: David M. Ceperley

    Introduction to Simulation Content: Why do simulations? Moore's law Two Simulation Modes Dirac, 1929 Challenges of Simulation: Physical and mathematical underpinnings Complexity Estimation of Computer Time and Size Challenges of Simulation: Multi-scale computational materials research Short...

  9. DragonflyTV Nano – Using the Power of Television to Introduce Middle School Children to Nanotechnology

    15 Jan 2009 | | Contributor(s):: Richard Hudson, Joan Freese, Angie Prindle, Lisa Regalla

    DragonflyTV is a PBS science series for children, broadcast nationwide and on the internet. DragonflyTV models authentic science inquiry through its unique approach: In each episode, ordinary kids conduct their own inquiry-based investigations, modeling the inquiry process and communicating the...

  10. Illinois MatSE 280 Introduction to Engineering Materials, Lecture 7: Mechanical Properties

    15 Dec 2008 | | Contributor(s):: Duane Douglas Johnson, Omar N Sobh

    Mechanical PropertiesWhy Mechanical Properties? Need to design materials that will withstand applied load and in-service uses for ... Space exploration, Bridges for autos and people, skyscrapers, MEMS devices, Space elevator?Content: Stress and strain Elastic and Plastic Deformation of Metals...

  11. Illinois MATSE 280 Introduction to Engineering Materials, Lecture 6: Diffusion in Solids

    19 Nov 2008 | | Contributor(s):: Duane Douglas Johnson, Omar N Sobh

    Diffusion in SolidsISSUES TO ADDRESS... How does diffusion occur? How can the rate of diffusion be predicted forsome simple cases? How does diffusion depend on structure and temperatureContent Diffusion- Steady and Non-Steady State Simple Diffusion Inter-diffusion Self-diffusion...

  12. Illinois MATSE 280 Introduction to Engineering Materials, Lecture 5 - Part 2 : Line Defects, Dislocations and their Scale

    14 Nov 2008 | | Contributor(s):: Duane Douglas Johnson, Omar N Sobh

    Imperfections in Solids (Continue)Content: Line Defects: Dislocations and their Scale Line Defects: Dislocations Incremental Slip and Bond Breaking Edge Dislocations Exiting Crystal Form Steps Dislocations: Screw, Edge and Mixed (in handout) Formation of Steps from Screw and Edge Dislocations...

  13. Illinois MATSE 280 Introduction to Engineering Materials, Lecture 5 - Part 1 : Imperfections in Solids

    14 Nov 2008 | | Contributor(s):: Duane Douglas Johnson, Omar N Sobh

    Imperfections in Solids ISSUES TO ADDRESS... What types of defects arise in solids? Describe them Can the number and type of defects be varied and controlled? How do defects affect material properties? Are defects undesirableGiven masses or atomic weights of two or more elements in an alloy,...

  14. nano-Materials Simulation Toolkit Quick Demo

    18 Oct 2008 | | Contributor(s):: Alejandro Strachan

    Demonstraton of the nanoHUB tool "nano-Materials Simulation Toolkit."

  15. Illinois MATSE 280 Introduction to Engineering Materials, Lecture 4 : Polymer Structures

    04 Oct 2008 | | Contributor(s):: Duane Douglas Johnson, Omar N Sobh

    Issues to Address...What are the basic Classification? Monomers and chemical groups? Nomenclature? Polymerization methods? Molecular Weight and Degree of Polymerization? Molecular Structures? Crystallinity? Microstructural features?

  16. Illinois MATSE 280 Introduction to Engineering Materials, Lecture 3 Part 4: Structures via Diffusion

    28 Sep 2008 | | Contributor(s):: Duane Douglas Johnson, Omar N Sobh

    Structures via DiffractionGoals Define basic ideas of diffraction (using x-ray, electrons, or neutrons, which, although they are particles, they can behave as waves) and show how to determine: Crystal Structure Miller Index Planes and Determine the Structure Identify cell symmetry Learning...

  17. Illinois MATSE 280 Introduction to Engineering Materials, Lecture 3 Part 3: Crystallographic Points, Directions, and Planes

    22 Sep 2008 | | Contributor(s):: Duane Douglas Johnson, Omar N Sobh

    Crystallographic Points, Directions, and PlanesIssues to Address...How to define points, directions, planes, as well aslinear, planar, and volume densitiesDefine basic terms and give examples of each: Points (atomic positions) Vectors (defines a particular direction - plane normal) Miller...

  18. Illinois MATSE 280 Introduction to Engineering Materials, Lecture 3 Part 2: Structure of Ceramics

    21 Sep 2008 | | Contributor(s):: Duane Douglas Johnson, Omar N Sobh

    Structure of CeramicsIssues to Address...Structures of ceramic materials: How do they differ from that of metals?Define basic terms and give examples of each: Lattice Basis Atoms (Decorations or Motifs) Crystal Structure Unit Cell Coordination Numbers Describe hard-sphere packing and identify...

  19. Illinois MATSE 280 Introduction to Engineering Materials, Lecture 3 Part 1: Structure of Metals and Ceramics

    19 Sep 2008 | | Contributor(s):: Duane Douglas Johnson, Omar N Sobh

    Structures of Metals and CeramicsGoals Define basic terms and give examples of each: Lattice Basis Atoms (Decorations or Motifs) Crystal Structure Unit Cell Coordination Numbers Describe hard-sphere packing and identify cell symmetry Crystals density: the mass per volume (e.g. g/cm3) Linear...

  20. Illinois MatSE 280 Introduction to Engineering Materials, Lecture 2: Atomic Structure and Interatomic Bonding

    18 Aug 2008 | | Contributor(s):: Duane Douglas Johnson, Omar N Sobh

    Refortify your chemistry - Atomic scale structuresGoals Define basic concepts: Filling of Atomic Energy Levels: Pauli Exclusion Principle Atomic Orbitals (s-, p-, d-, and f- type electrons) Types of Bonding between Atoms The Periodic Table (and solid state structures) Bond Energy Curves Describe...