Poly (lactic-co-glycolic acid) (PLGA) porous scaffold for tissue engineering.
The patients own cells are seeded onto the scaffold and allowed to attach and start producing new bone. The construct is implanted into the defect site, where eventually the polymer will biodegrade and be completely removed, leaving a natural autogenous bone graft. This technique is particularly useful for large defects, or where the host bed is compromised due to disease, although it is still at the research stage. Average Pore Size 350-550 micrometre, porosity estimated at 35-45%.
Workshop 7: Children's Ways of Knowing
With Dr. Herbert Ginsburg. Children know a good deal of informal mathematics before they enter school. Clinical interviews help teachers understand what children know. In this session, you will see young children’s natural mathematical inclinations and watch as they construct their ideas. Observe Professor Ginsburg helping teachers of young children rethink t
Acceleration Lab Experiment
In this slow motion video for IPS Schools by Clayborn a ball is released on an inclined plane and accelerates due to the force of gravity. At the bottom of the first inclined plane to the beginning of the second inclined plane the ball stops its positive acceleration by nearly maintaining its horizontal speed. On the second ramp the ball accelerates backwards down the slope, or loses speed to a point where it momentarily comes to rest. Therefore this video demonstrates POSITIVE ACCELERATION, ZER
4.7: Quartiles and the interquartile range The first alternative measure of dispersion we shall discuss is the interquartile range: this is the difference between summary measures known as the lower and upper quartiles. The quartiles are simple in concept: if the median is regarded as the middle data point, so that it splits the data in half, the quartiles similarly split the data into quarters. This is, of course, an over-simplification. With an even number of data points, the median is defined to be the average of the middle two: de
Finding the Hypotenuse
The hypotenuse of a right triangle is the side that is opposite of its right angle. Sometimes we have problems that ask us to find the missing hypotenuse of a right triangle. This video describes how to use the Pythagorean theorem to find the hypotenuse, but only when the length measure of the two legs is known. (1:16)
Conclusion This free course provided an introduction to studying Education, Childhood & Youth qualifications. It took you through a series of exercises designed to develop your approach to study and learning at a distance and helped to improve your confidence as an independent learner.
4.3.2 Removal of CO Under fuel-lean conditions (excess O2), the oxidation of CO has been studied over a very large range of single crystals and model noble metal catalysts, one of the most intensively investigated examples being the Pd(111) surface. Although this metal is not a component of the current three-way catalyst used in the UK, it is worth considering the results in some detail for a number of reasons. The reaction on metals such as Pt is in many ways similar to that on Pd and, in any
Silk purses from sow's ears
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Acknowledgements Except for third party materials and otherwise stated (see terms and conditions ), this content is made available under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 Licence . The material acknowledged below is Proprietary and used under licence (not subje
Simplifying Level 3 Exponent Problems - Khan Academy
This instructor in this video, Sal Khan, continues with fractional exponents. Mr. Khan uses computer software (with different colors) to demonstrate how to solve Level 3 exponents. Several examples are modeled using a step by step approach. (09:13)
Abraham Lincoln
Documentary- Abraham Lincoln is credited by many with saving a nation. From humble beginnings to a tragic end, follow the events that shaped the life of the United States' 16th President.
9.3 Linear notes This is the most common form of note-taking. It involves writing in sequence the points you want to note. As with all note-taking, the aim is to pick out and record the most important points. Avoid simply writing out most or all of the text again. Try to write your notes in your own words as this will help you understand what you have been reading about. Also add a reference to which page(s) of the text your notes refer so you can easily find your way back to the relevant part of the te
Mayan Pyramids of Chichen Itza
This National Geographic video shows the Mayan Pyramids. It is part of the series Lost Temples and it tries to give an answer to the question "Why did the Maya abandon their magnificent city of Chichen Itza?" There is reference to Maya culture. (03:30)
2.2.1 Normal galaxies Normal galaxies are made up of stars and (in the case of spiral and irregular galaxies) gas and dust. Their spectra consist of the sum of the spectra of these components. The optical spectra of normal stars are continuous spectra overlaid by absorption lines (Figure 1). There are two factors to consider
3.2 Necessities and luxuries As the division of opinion between the government and low income people illustrates, definitions of poverty are the stuff of political debate. People in the Rowntree studies tended to focus on ‘paying bills and food’. Most people's list of basic needs would also include adequate food and clean water, clothing, shelter and heating. But are there also less apparently physiological, more evidently social, necessities of life? 2 2 Note taking from an audio visual text The first important point to make is that note taking is more than a process of summarising everything that you see; it must be an active process of engaging with the material and thinking it through for yourself. In the videos, the multidimensional nature of the visual images and the stories they convey means that you will not be able to take in everything on first viewing. The videos allow us to present visual as well as audio information and in a form that makes it easier for you to revisi 2.3 Other influences on market demand What about other variables which may affect demand? Let us consider four such variables. As is often the case in economics, the first two points involve understanding some rather formal relationships between variables, in this case price and income.
The price of other goods. Two goods x and y are known as substitutes if the quantity demanded of good x increases after a rise in the price of good y. The 6 Next steps After completing this unit you may wish to study another OpenLearn Study Unit or find out more about this topic. Here are some suggestions: The Science Behind Self-Control Compound & Complex Sentences
Have you ever wondered why you can't bring yourself to choose the foods that are healthy over the ones you know are unhealthy? Researchers are not only trying to find out why, but what parts of the brain govern behaviors of self-control and how we can work to improve them. Ben Hayden is a neuroscientist and Assistant Professor of Brain and Cognitive Sciences at the University of Rochester. He offers his insights based upon his research and how it has the potential to apply not only to our choice
A video powerpoint for learning the structure of compound and complex sentences. There is no sound, but there are a lot of examples. (11:05)
