Fabrizio Scarpa : "Cellular structures for morphing wings and reflectors"

In recent years the aerospace R&D community has witnessed a significant surge in research activities connected to morphing aerospace structures. This seminar describes the results from modelling and testing prototypes of wingboxes and satellite antenna reflectors made with cellular configurations. The cellular structures used (honeycombs, truss-cores, lattices) show negative and zero Poisson’s ratio behaviours, and are made from polimeric, shape memory alloy and embedded piezoelectr
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7.6 Synaptogenesis

The formation of synaptic connections is an essential property of nervous system development. Synapses are formed between neurons and also with targets that are not part of the nervous system, e.g. muscle. Axon terminals, under the direction of a variety of extracellular cues, grow towards particular targets. Once they arrive at the target, they stop growing and the growth cone changes to form a synapse. As with axon growth, the formation of the synapse is dependent on an interaction between
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Vocales Que Son Cinco
Canción infantil para aprender las vocales. (02:56)
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Beginning Cursive Handwriting
Video for cursive handwriting practice. It shows how to join letters in writing . This video does not have sound. Writing is shown on a whiteboard. (04:23)
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6.1 Firing-rate hypothesis

Information about stimulus intensity is encoded in two ways: the firing rates of neurons and the number of active neurons.

Intensity is assumed to be encoded by an increase in discharge rate of action potentials within the auditory system. As the stimulus gets more intense, the basilar membrane vibrates at a greater amplitude causing the membrane potential of activated hair cells to be more depolarised and this causes the nerve fibres that synapse onto the hair cells to fire at a greate
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4.3 The UK's coal reserves

Production of large quantities of coal in the UK during the 19th and 20th centuries led to the progressive depletion of reserves. In 2005 underground mining was limited to the Carboniferous coalfields of Yorkshire and the East Midlands, with only one underground mine operating in South Wales. However, surface mining sites still work coal in most of the coalfields (Author(s): The Open University

Web Science from a multinational business perspective
Web Science from a multinational business perspective - JP Rangaswami
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Cleaning a Personal Computer Keyboard
Learn from our expert some great techniques for cleaning your computer keyboard.
 
You need some electronic wipes, a can of air and a toothbrush to clean the keyboard.  This video takes you through the steps to be able to clean out your keyboard.

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Chemical and Environmental Behaviour of Materials: Batteries
This animation demonstrates electron flow in a Daniell cell. From TLP: Batteries
Author(s): DoITPoMS, University of Cambridge,Emily Weal, Univ

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3.1 Overview

Scattering calculations using wave packets are so laborious that they are generally done numerically, using a computer. However, in many cases, scattering phenomena can be adequately treated using a procedure based on stationary states. This approach can give valuable insight into the scattering process without the need for computer simulations.

Session 3 introduces the stationary-state approach to scattering. The discussion is mainly confined to one dimension, so a stationary-state sol
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2.6 The surface

David A. Rothery Teach Yourself Planets, Chapter 6, pp. 66-75, Hodder Education, 2000, 2003.

Copyright © David Rothery

Look at the Moon even with the unaided eye, and you will see that it has dark patches on a paler background (Figure 2). This simple observation picks out the two distinct types of crust on the Moon. The paler areas are the lunar highlands, and the darker areas are the lunar 'seas' or maria (singular: mare). Both the highlands an
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COMP2214 - Lecture 18 - Requirements Engineering
COMP2214 - Lecture 18 - Requirements Engineering -
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2.3 Obesity – an evolutionary perspective

If you were now to take a broader biological approach to the data discussed in the previous section you might still be puzzled. Excess body weight leads to a variety of diseases, including diabetes, osteoarthritis and so on – surely this must reduce overall biological fitness.

Activity 21

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HST.721 The Peripheral Auditory System (MIT)
In this course, experimental approaches to the study of hearing and deafness are presented through lectures, laboratory exercises and discussions of the primary literature on the auditory periphery. Topics include inner-ear development, functional anatomy of the inner ear, cochlear mechanics and micromechanics, mechano-electric transduction by hair cells, outer hair cells' electromotility and the cochlear amplifier, otoacoustic emissions, synaptic transmission, stimulus coding in auditory nerve
Author(s): Liberman, Charlie,Adams, Joe C.

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THE100 Television, Film & Theater Spring 2015 Session #08
with Naomi Buckley Appreciation of the performing arts of television, film and live theater through the viewing of films. www.YouTube.com/csuDHTV [Please Subscribe]
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4 Locating high-enthalpy geothermal fields

The search for potentially useful geothermal fields focuses initially on locating rocks that have been chemically altered by natural geothermal fluids, as well as looking for obvious surface features of geothermal activity such as geysers and hot springs. Measurements of fluid flow through the field allow estimation of its likely economic potential.

When a promising resource has been located exploration wells are drilled. However, given the high pressures and temperatures typical of a g
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2.6 Underground mining

Coal extraction is of course less straightforward using underground mining techniques. The associated costs are higher, and these begin with the sinking of two shafts, an 'upcast' and a 'downcast' shaft for ventilation (Figure 22). Sinking these to a depth of a kilometre may take a few years and during this time, no coal is ex
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The Gold Of The Andes
This video clip is a short film about a journey to source one of the most luxurious materials in the world. The Incas believed the Vicuña animals were  rewarded with a coat of pure gold in return for giving life to their civilization. They called it “The Gold Of The Andes”. (07:17)
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8.4 Fragile X syndrome

Fragile X syndrome is the final example of a genetic disease considered here.

Activity 21

What does the term ‘genetic disease’ mean?

Answer
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Energy resources: Wave energy
The energy carried by ocean waves derives from a proportion of the wind energy transferred to the ocean surface by frictional drag. So, ultimately it stems from the proportion of incoming solar energy that drives air movement. Just how much energy is carried by a single wave depends on the wind speed and the area of ocean surface that it crosses; wave height, wavelength, and therefore wave energy, are functions of the distance or fetch over which the wind blows. This free course, Energy resourc
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