FOAMCARP closed cell aluminium foam
Additions such as SiC are made to molten aluminium or aluminium alloy to modify the melt viscosity and make it suitable for foaming. Calcium carbonate is then added to the melt which is solidified to form a precursor which can be foamed in a controlled manner by a subsequent heat treatment. The resulting foam has a fine and relatively uniform cell structure.
High magnification SEM image of open cell polyurethane foam
If a gas is injected into a liquid it forms a cellular foam structure. When a thermoset prepolymer of low viscosity is foamed, the polymer can drain from the cell walls (driven by surface tension) before it sets at the cell edges, leaving an open-celled foam. The cell edges have three concave sides, and some remnants of collapsed cell walls can be seen at the cell edges.
FORMGRIP closed cell aluminium foam
Additions such as SiC are made to molten aluminium or aluminium alloy to modify the melt viscosity and make it suitable for foaming. 1 to 3 wt% of pre-oxidised titanium hydride is then added to the melt which is solidified to form a precursor which can be foamed in a controlled manner by a subsequent heat treatment. The resulting foam has a relatively fine and uniform cell structure.
Providing for Gifted and Talented Youth
The announcement of a national register of gifted and talented pupils has raised questions over how we provide for the most able children. Commentators have raised concerns over elitism, how we select people for the register and even whether this is the most effective approach to dealing with gifted provision in schools. Professor Deborah Eyre is the Director of the National Academy for Gifted and Talented Youth, based at the University of Warwick. NAGTY is tasked with identifying the top 5%
"Object orientation" What's it all about?
introduction to object orientation including design and analysis methods, benefits, pros and cons To appreciate: what is meant by “object-orientation’ how it arose why it is a useful approach
9.18 Developmental Neurobiology (MIT)
This course considers molecular control of neural specification, formation of neuronal connections, construction of neural systems, and the contributions of experience to shaping brain structure and function. Topics include: neural induction and pattern formation, cell lineage and fate determination, neuronal migration, axon guidance, synapse formation and stabilization, activity-dependent development and critical periods, development of behavior.
HST.535 Principles and Practice of Tissue Engineering (MIT)
The principles and practice of tissue engineering (and regenerative medicine) are taught by faculty of the Harvard-MIT Division of Health Sciences and Technology (HST) and Tsinghua University, Beijing, China. The principles underlying strategies for employing selected cells, biomaterial scaffolds, soluble regulators or their genes, and mechanical loading and culture conditions, for the regeneration of tissues and organs in vitro and in vivo are addressed. Differentiated cell types and stem cells
18.303 Linear Partial Differential Equations (MIT)
This course covers the classical partial differential equations of applied mathematics: diffusion, Laplace/Poisson, and wave equations. It also includes methods and tools for solving these PDEs, such as separation of variables, Fourier series and transforms, eigenvalue problems, and Green's functions.
Life Cycle Analysis and Carbon Footprinting Session Outline
Part Three of Greening Business: Life cycle analysis is a relatively new approach to environmental management which seeks to understand the impact of all related aspects of a product or service over its whole life cycle from production to disposal. An understanding of life cycle analysis is essential to a holistic understanding of the impact of products and services and hence the environmental benefits of changes to processes. It also underpins the process of carbon footprinting.
E-portfolio learning lunch - Ben Cotton's Presentation
Staff and students are becoming increasingly aware of the potential use and benefits of e-portfolios and social media tools. Delegates will have the opportunity to explore the use of e-portfolios and social media through three case studies: Ben Cotton will provide a student / graduate trainee perspective focusing on the explosion of social media and its potential in terms of personal development, reflection, career planning and in terms of forging a career in the PR industry. Ben conducted his o
The look at the plants themselves - their form and the arrangement of their parts.
Model of the monoclinic ZrO2 unit cell
Rotating model of the monoclinic ZrO2 unit cell.
Apple Cup Rivals Contribute to Apple Genome Sequencing
PULLMAN, Wash. — An international team of scientists from Italy, France, New Zealand, Belgium and the USA have published a draft sequence of the domestic apple genome in the current issue of Nature Genetics. The availability of a genome sequence for apple will allow scientists to more rapidly identify which genes provide desirable characteristics to the fruit and which genes and gene variants provide disease or drought resistance to the plant. This information can be used to rapidly improve
Article :: Real World Tips For Using Illustrator's Objects, Groups, and Layers
Just as there are benefits to keeping an orderly desk, there are advantages to using groups and layers for adding structure to your files. In Adobe Illustrator CS2, groups and layers not only offer a convenient way to manage objects in a file (as they did in earlier versions of Illustrator), but now they can also control the appearance of your file. Find out more in this informative chapter by Mordy Golding.
Orchestrating cell separation in plants : what are the risks and benefits?
In this podcast, Professor Roberts from the School of Biosciences discusses his research into the mechanism responsible for regulating cell separation in plants. In particular how plants ‘shed’ parts of themselves such as leaves or fruit. Professor Roberts explores the potential application of his research, through prevention or encouraging of the ‘shedding’ process, agricultural harvests could potentially be increased or even synchronised. Professor Roberts also discusses the resistance
Life Cycle Analysis and Carbon Footprinting Question Bank
Question Bank for Part Three of Greening Business: Life cycle analysis is a relatively new approach to environmental management which seeks to understand the impact of all related aspects of a product or service over its whole life cycle from production to disposal. An understanding of life cycle analysis is essential to a holistic understanding of the impact of products and services and hence the environmental benefits of changes to processes. It also underpins the process of carbon footprint
TALAT Lecture 3210: Continuous Casting
This lecture gives an overview about the possibilities to produce aluminium foilstock and wire-bar in a continuous way. Continuous casting is the preferred casting method in modern plants because it offers higher productivity. But there are limitations in the use of this technology because not all alloys can be cast. The product shows properties that can differ from conventional material. This lecture demonstrates the principal of operation; technologies for continuous casting; types of casters;
It is necessary to form a stable dispersion of nanotubes in order to properly integrate them into polymeric systems. This can be achieved by treating them with acid to oxidise the tube surfaces. The tubes will then spontaneously disperse in an aqueous medium. The viscosity of these suspensions is analogous to that of polymers; it increases gradually with concentration up to a critical point (at about 0.7 vol%) where entanglement occurs. However, their separation is determined more by surface rep
Coarse open celled aluminium foam produced by infiltration of sintered salt (FOAM-U-LIKE)
FOAM-U-LIKE (Foaming of aluminium metal using lightly interconnected kevelled elements) is a very inexpensive route for the production of coarse open celled foams. It allows a reasonable degree of control over cell size and shape, and results in relatively uniform morphology. The interconnectivity of pores can be controlled by varying the degree of sintering of the precursor. In this case, grains of 1-4mm diameter have been sintered at 600 degrees C for just 10 minutes, giving rise to lightly in
Setting up and facilitating student focus groups
evaluating curriculum developments: Why use Student Focus Groups?Benefits and advantages: easy produces more open responses allows responses from a diverse range of people Limitations: relies on the skills of the facilitator need to be carefully planned and executed transcription and summarisation can be time-consuming