The Hairdryer and the Ping Pong Ball
The Hairdryer and the Ping Pong Ball
This video explains the fluid mechanics principles underlying the classic classroom demonstration of a ping pong ball suspended in the air stream of a hair dryer.
Tipping Criteria for Robots
Tipping Criteria for Robots
This video demonstrates the techniques and principles behind how to design a stable robot that will not tip in motion.
Nano-to-Macro Transport Processes - Lecture 11: Energy ...
Nano-to-Macro Transport Processes - Lecture 11: Energy Transfer by Waves: ...
Description: The main focus is the microscopic picture of waves. This lecture discusses the energy transport by waves, by using the Maxwell's equations in different electric/magnetic fields and between different interfaces. Instructor: Prof. Gang Chen
Nano-to-Macro Transport Processes - Lecture 17: Solutions ...
Nano-to-Macro Transport Processes - Lecture 17: Solutions to Boltzmann ...
Description: Students learn to solve the Boltzmann equation in the classical limit under relaxation time approximation in this lecture. Students also learn to derive the Fourier law, Newton shear law, and the electron transport process with the Ohm's Law. Instructor: ...
Nano-to-Macro Transport Processes - Lecture 20: Classical ...
Nano-to-Macro Transport Processes - Lecture 20: Classical Size Effects, ...
Description: This lecture continues discussion on energy transport when it travels perpendicularly to a film. It also provides solving Boltzmann equation with consideration of classical size effects under circumstances of heat carriers colliding with boundaries. ...
Nano-to-Macro Transport Processes - Lecture 23: Liquids: ...
Nano-to-Macro Transport Processes - Lecture 23: Liquids: Brownian Motion ...
Description: The lecture first continues discussion on liquids. It investigates transport properties of bulk liquids, and different forces and potentials between particles and surfaces in liquids. It also explores current research in solar-cells. Instructor: Prof. Gang ...
Nano-to-Macro Transport Processes - Lecture 10: Fundamental ...
Nano-to-Macro Transport Processes - Lecture 10: Fundamental of Statistical ...
Description: The discussion on statistical physics continues in this lecture. The instructor gives several examples in different ensemble cases, and also an application example in gas molecule. Instructor: Prof. Gang Chen
Nano-to-Macro Transport Processes - Lecture 14: Wave ...
Nano-to-Macro Transport Processes - Lecture 14: Wave Phenomena and ...
Description: This lecture continues previous discussion of wave propagation in thin films, and determines the energy exchange between two points. It also explores various examples in application of tunneling. Instructor: Prof. Gang Chen
Nano-to-Macro Transport Processes - Lecture 2: ...
Nano-to-Macro Transport Processes - Lecture 2: Characteristic Time and ...
Description: This lecture elaborates on the microscopic pictures of energy carriers. It explains more details on energy transfer, and compares between micro and nanoscale phenomena, including classical size effects and quantum size effects. Instructor: Prof. Gang Chen
Nano-to-Macro Transport Processes - Lecture 4: Solutions to ...
Nano-to-Macro Transport Processes - Lecture 4: Solutions to Schrödinger ...
Description: This lecture provides the example solutions to Schrodinger equation. It also investigates the quantized energy in material waves with different quantum numbers and quantum states, including 1-D quantum well and 2-D quantum wire. Instructor: Prof. Gang Chen
Nano-to-Macro Transport Processes - Lecture 8: Density of ...
Nano-to-Macro Transport Processes - Lecture 8: Density of States and ...
Description: This lecture emphasizes on density of (quantum mechanical) states in electrons, phonons, and photons, elaborating the topic with examples in the 2-D and 3-D structure. It also talks about quantum statistics. Instructor: Prof. Gang Chen
Nano-to-Macro Transport Processes - Lecture 24: Electrical ...
Nano-to-Macro Transport Processes - Lecture 24: Electrical Double Layer, ...
Description: This lecture continues to explore the repulsive force between particles and surfaces in liquids and learn more on electrokinetics. It also investigates the size effect on phase transition. Instructor: Prof. Gang Chen
Nano-to-Macro Transport Processes - Lecture 12: EM Waves: ...
Nano-to-Macro Transport Processes - Lecture 12: EM Waves: Reflection at a ...
Description: In this lecture, students learn to calculate the energy carried by electromagnetic (EM) waves, and understand how EM waves propagate in a medium and at an interface. Instructor: Prof. Gang Chen
Nano-to-Macro Transport Processes - Lecture 13: EM Wave ...
Nano-to-Macro Transport Processes - Lecture 13: EM Wave Propagation ...
Description: This lecture provides more details on the application of Snell's Law at one single interface; later, more discussion of the wave propagation in multi-layered structures, for instance thin films. It also gives out information about the first midterm exam. ...
Nano-to-Macro Transport Processes - Lecture 21: Slip ...
Nano-to-Macro Transport Processes - Lecture 21: Slip Condition, Coupled ...
Description: The lecture introduces various approximate ways to tribute all effects to different boundaries/interfaces conditions, and covers topics in energy conversion and coupled transport processes. It also provides details of the second midterm exam. Instructor: ...
Nano-to-Macro Transport Processes - Lecture 22: PN ...
Nano-to-Macro Transport Processes - Lecture 22: PN Junction, Diode and ...
Description: This lecture uncovers the basic science of semiconductor devices and solar cells, including p-n junction and photovoltaic effects. Also, it explains the phenomenon of Shockley-Queisser limit. Instructor: Prof. Gang Chen
Nano-to-Macro Transport Processes - Lecture 1: Intro to ...
Nano-to-Macro Transport Processes - Lecture 1: Intro to Nanotechnology, ...
Description: This intro lecture gives an overview of the course and the research in the field of nanoscience and technology. It starts with review of the classical laws related to energy transport processes, and introduces microscopic pictures of energy carriers. ...
Nano-to-Macro Transport Processes - Lecture 5: Electronic ...
Nano-to-Macro Transport Processes - Lecture 5: Electronic Levels in ...
Description: This lecture investigates the electron's energy levels in solids, including metals, insulators, and semiconductors. It also introduces the Bloch theorem to calculate the periodic potential in crystals. Instructor: Prof. Gang Chen