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Great Writers Inspire- An Introduction to the Project Great Writers Inspire- An Introduction to the Project

Description

A short introductory video to the "Great Writers Inspire project. A short introductory video to the "Great Writers Inspire project.

Subjects

#greatwriters | #greatwriters | #ukoer | #ukoer | poetry | poetry | literature | literature | shakespeare | shakespeare | english | english | #greatwriters | #ukoer | poetry | literature | shakespeare | english | 2012-05-22 | #greatwriters | #ukoer | poetry | literature | shakespeare | english | 2012-05-22

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Prokaryotes and eukaryotes Prokaryotes and eukaryotes

Description

This RLO describes the characteristics of eukaryotic and prokaryotic cells. This RLO describes the characteristics of eukaryotic and prokaryotic cells.

Subjects

ukoer | ukoer | Science basics | Science basics

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Zn, cold rolled - mechanical twins Zn, cold rolled - mechanical twins

Description

This sample was cold rolled. Zinc has a hexagonal structure so it contains only two independent slip systems. However, for slip to occur, five slip systems are required so zinc does not undergo general plasticity. Instead it forms mechanical twins as an alternative to dislocation motion to accommodate the deformation. This sample was cold rolled. Zinc has a hexagonal structure so it contains only two independent slip systems. However, for slip to occur, five slip systems are required so zinc does not undergo general plasticity. Instead it forms mechanical twins as an alternative to dislocation motion to accommodate the deformation.

Subjects

alloy | alloy | mechanical twins | mechanical twins | metal | metal | twinning | twinning | zinc | zinc | DoITPoMS | DoITPoMS | University of Cambridge | University of Cambridge | micrograph | micrograph | corematerials | corematerials | ukoer | ukoer

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Fe, C 0.15 (wt%) steel, quenched. Fe, C 0.15 (wt%) steel, quenched.

Description

A low carbon steel quenched in order to produce martensitic plates. A low carbon steel quenched in order to produce martensitic plates.

Subjects

alloy | alloy | carbon | carbon | iron | iron | martensite | martensite | metal | metal | quenching | quenching | steel | steel | DoITPoMS | DoITPoMS | University of Cambridge | University of Cambridge | micrograph | micrograph | corematerials | corematerials | ukoer | ukoer

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Tensile failure surface of a carbon fibre composite Tensile failure surface of a carbon fibre composite

Description

This is from the region of the fracture surface which was in tension. The fibres show clean, brittle fracture surfaces (with no fibrillation or distortion and little distortion of the matrix) and have broken at varying lengths and hence some stick out while others have left holes in the matrix. This is indicative of fibre pull-out having occurred after an initial failure of the matrix, followed by failure of the fibres themselves. This is a toughening mechanism in fibre reinforced composites. It is also involved in composite crack stopping properties; each fibre has briefly slowed the progress of the crack by opening it up along the weak fibre-matrix interface and hence blunting the crack tip. The crack therefore advances relatively slowly, with much lateral meandering. This is from the region of the fracture surface which was in tension. The fibres show clean, brittle fracture surfaces (with no fibrillation or distortion and little distortion of the matrix) and have broken at varying lengths and hence some stick out while others have left holes in the matrix. This is indicative of fibre pull-out having occurred after an initial failure of the matrix, followed by failure of the fibres themselves. This is a toughening mechanism in fibre reinforced composites. It is also involved in composite crack stopping properties; each fibre has briefly slowed the progress of the crack by opening it up along the weak fibre-matrix interface and hence blunting the crack tip. The crack therefore advances relatively slowly, with much lateral meandering.

Subjects

alignment | alignment | carbon | carbon | carbon fibres | carbon fibres | CFC | CFC | composite material | composite material | epoxy | epoxy | fibre | fibre | fracture | fracture | neutral axis | neutral axis | polymer composite | polymer composite | pull-out | pull-out | reinforcement | reinforcement | DoITPoMS | DoITPoMS | University of Cambridge | University of Cambridge | micrograph | micrograph | corematerials | corematerials | ukoer | ukoer

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Changes in microstructure of a shape memory alloy (CuAlNi single crystal) Changes in microstructure of a shape memory alloy (CuAlNi single crystal)

Description

Changes in microstructure of a shape memory alloy being heat treated and also mechanically deformed. A CuAlNi single crystal (2H orthorhombic phase ) is compressed (vertical axis) at room temperature, causing activation of two sequential twinning deformations. As austenite, the crystal is cube-shaped, whereas in the martensite form it is sheared. Six different sheared martensite crystals, having well - defined prism shapes (three of which appear in this video), can be created by pressing on 3 different faces of the cube. It is essential that the loading arrangement allows lateral displacements to occur. From TLP: Microstructural Changes. Video was kindly donated by Vaclav Novak and Petr Sittner, Department of Functional Materials Institute of Physics of the ASCR, Prague, Czech Republic Changes in microstructure of a shape memory alloy being heat treated and also mechanically deformed. A CuAlNi single crystal (2H orthorhombic phase ) is compressed (vertical axis) at room temperature, causing activation of two sequential twinning deformations. As austenite, the crystal is cube-shaped, whereas in the martensite form it is sheared. Six different sheared martensite crystals, having well - defined prism shapes (three of which appear in this video), can be created by pressing on 3 different faces of the cube. It is essential that the loading arrangement allows lateral displacements to occur. From TLP: Microstructural Changes. Video was kindly donated by Vaclav Novak and Petr Sittner, Department of Functional Materials Institute of Physics of the ASCR, Prague, Czech Republic

Subjects

microstructure | microstructure | shape memory alloy | shape memory alloy | deformation | deformation | DoITPoMS | DoITPoMS | University of Cambridge | University of Cambridge | video | video | corematerials | corematerials | ukoer | ukoer

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Introduction to microscopy

Description

A short video demonstrating how to set up a light microscope.

Subjects

light microscope | microscopy | bioukoer | ukoer | virtual analytical laboratory | val | Biological sciences | C000

License

Attribution-Noncommercial-Share Alike 2.0 UK: England & Wales Attribution-Noncommercial-Share Alike 2.0 UK: England & Wales http://creativecommons.org/licenses/by-nc-sa/2.0/uk/ http://creativecommons.org/licenses/by-nc-sa/2.0/uk/

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Clinical impact of changes in drug clearance Clinical impact of changes in drug clearance

Description

Examines some of the factors which affect total body clearance of a drug and how this, in turn, influences a drug's clinical impact. Examines some of the factors which affect total body clearance of a drug and how this, in turn, influences a drug's clinical impact.

Subjects

ukoer | ukoer | Biological processes | Biological processes | Pharmacology | Pharmacology

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Organisation of organs Organisation of organs

Description

As taught Semesters 1 and 2, 2011 The learning object, used as part of the level 1 Biological Sciences module delivered by the School of Nursing, Midwifery and Physiotherapy describes how a hollow organ such as the intestine, and a compact organ such as a salivary gland, are formed from the four basic tissue types. Dr Andy Meal, Lecturer in Biological Sciences, School of Nursing, Midwifery and Physiotherapy As taught Semesters 1 and 2, 2011 The learning object, used as part of the level 1 Biological Sciences module delivered by the School of Nursing, Midwifery and Physiotherapy describes how a hollow organ such as the intestine, and a compact organ such as a salivary gland, are formed from the four basic tissue types. Dr Andy Meal, Lecturer in Biological Sciences, School of Nursing, Midwifery and Physiotherapy

Subjects

UNow | UNow | ukoer | ukoer | Histology | Histology | Cell | Cell | Biology | Biology | Tissues | Tissues | Organs | Organs

License

Except for third party materials (materials owned by someone other than The University of Nottingham) and where otherwise indicated, the copyright in the content provided in this resource is owned by The University of Nottingham and licensed under a Creative Commons Attribution-NonCommercial-ShareAlike UK 2.0 Licence (BY-NC-SA) Except for third party materials (materials owned by someone other than The University of Nottingham) and where otherwise indicated, the copyright in the content provided in this resource is owned by The University of Nottingham and licensed under a Creative Commons Attribution-NonCommercial-ShareAlike UK 2.0 Licence (BY-NC-SA)

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Fe, C 0.2 (wt%), explosively deformed - mechanical twins Fe, C 0.2 (wt%), explosively deformed - mechanical twins

Description

This sample was explosively deformed so that there was insufficient time for dislocation motion to occur. Hence, mechanical twins are produced despite the b.c.c. structure of mild steel. This sample was explosively deformed so that there was insufficient time for dislocation motion to occur. Hence, mechanical twins are produced despite the b.c.c. structure of mild steel.

Subjects

alloy | alloy | carbon | carbon | iron | iron | mechanical twins | mechanical twins | metal | metal | steel | steel | twinning | twinning | DoITPoMS | DoITPoMS | University of Cambridge | University of Cambridge | micrograph | micrograph | corematerials | corematerials | ukoer | ukoer

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Fe, C 0.15 (wt%) steel, quenched. Fe, C 0.15 (wt%) steel, quenched.

Description

A low carbon steel quenched in order to produce martensitic plates. A low carbon steel quenched in order to produce martensitic plates.

Subjects

alloy | alloy | carbon | carbon | iron | iron | martensite | martensite | metal | metal | quenching | quenching | steel | steel | DoITPoMS | DoITPoMS | University of Cambridge | University of Cambridge | micrograph | micrograph | corematerials | corematerials | ukoer | ukoer

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Kevlar fibre composite fracture surface Kevlar fibre composite fracture surface

Description

Because a relatively short beam was used, significant shear stresses existed in the beam, and failure has occurred principally by shear. In this mode, the specimen splits longitudinally along planes parallel to its neutral axis, due to shear failure within the matrix and at the weak interface between fibres and matrix. Matrix porosity (and particularly the long longitudinal voids present in this specimen), the poor wetting of fibres by the resin, and poor fibre distribution will all promote failure by shear. However, it may be that this failure mechanism has been partly inhibited by poor fibre alignment since some off-axis fibres will reinforce the matrix in shear Because a relatively short beam was used, significant shear stresses existed in the beam, and failure has occurred principally by shear. In this mode, the specimen splits longitudinally along planes parallel to its neutral axis, due to shear failure within the matrix and at the weak interface between fibres and matrix. Matrix porosity (and particularly the long longitudinal voids present in this specimen), the poor wetting of fibres by the resin, and poor fibre distribution will all promote failure by shear. However, it may be that this failure mechanism has been partly inhibited by poor fibre alignment since some off-axis fibres will reinforce the matrix in shear

Subjects

alignment | alignment | composite material | composite material | epoxy | epoxy | fibre | fibre | fibrillation | fibrillation | fracture | fracture | hackle region | hackle region | Kevlar | Kevlar | liquid crystalline polymer (LCP) | liquid crystalline polymer (LCP) | lyotropic | lyotropic | polymer | polymer | polymer composite | polymer composite | reinforcement | reinforcement | shear | shear | DoITPoMS | DoITPoMS | University of Cambridge | University of Cambridge | micrograph | micrograph | corematerials | corematerials | ukoer | ukoer

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Changes in microstructure of a shape memory alloy (bi-crystal of austenitic CuAlNi ) Changes in microstructure of a shape memory alloy (bi-crystal of austenitic CuAlNi )

Description

Changes in microstructure of a shape memory alloy being heat treated and also mechanically deformed. A bi-crystal of austenitic CuAlNi is cooled, causing transformation to the martensitic (2H orthorhombic) phase. The process is reversed in the second half of the video, as the specimen is heated again. The rate at which transformation occurs is controlled by heat flow effects. (The shear process itself tends to take place very rapidly.) The martensitic phase is internally twinned. This is very clear within the dark-coloured phase moving in from the left-hand side in the first part of this video. From TLP: Microstructural Changes. Video was kindly donated by Vaclav Novak and Petr Sittner, Department of Functional Materials Institute of Physics of the ASCR, Prague, Czech Republic Changes in microstructure of a shape memory alloy being heat treated and also mechanically deformed. A bi-crystal of austenitic CuAlNi is cooled, causing transformation to the martensitic (2H orthorhombic) phase. The process is reversed in the second half of the video, as the specimen is heated again. The rate at which transformation occurs is controlled by heat flow effects. (The shear process itself tends to take place very rapidly.) The martensitic phase is internally twinned. This is very clear within the dark-coloured phase moving in from the left-hand side in the first part of this video. From TLP: Microstructural Changes. Video was kindly donated by Vaclav Novak and Petr Sittner, Department of Functional Materials Institute of Physics of the ASCR, Prague, Czech Republic

Subjects

microstructure | microstructure | shape memory alloy | shape memory alloy | deformation | deformation | DoITPoMS | DoITPoMS | University of Cambridge | University of Cambridge | video | video | corematerials | corematerials | ukoer | ukoer

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Principles of digital systems : level 1 part 1 : exam questions

Description

This open educational resource was released through the Higher Education Academy Engineering Subject Centre Open Engineering Resources Pilot project. The project was funded by HEFCE and the JISC/HE Academy UKOER programme.

Subjects

ukoer | engscoer | cc-by | portsmouthunioer | university of portsmouth | electronic and computer engineering | examopediaukoer | Engineering | H000

License

Attribution 2.0 UK: England & Wales Attribution 2.0 UK: England & Wales http://creativecommons.org/licenses/by/2.0/uk/ http://creativecommons.org/licenses/by/2.0/uk/

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Introduction to pipettes

Description

Three videos introducing and demonstrating different types of laboratory pipette.

Subjects

pipette | gilson | micropipette | plastic pipette | graduated pipette | dilutions | bioukoer | ukoer | virtual analytical laboratory | val | Biological sciences | C000

License

Attribution-Noncommercial-Share Alike 2.0 UK: England & Wales Attribution-Noncommercial-Share Alike 2.0 UK: England & Wales http://creativecommons.org/licenses/by-nc-sa/2.0/uk/ http://creativecommons.org/licenses/by-nc-sa/2.0/uk/

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Introduction to portfolios and their uses Introduction to portfolios and their uses

Description

To identify what a portfolio is, why they are used and to identify some pieces of material that may be used to support claims for learning and development. To identify what a portfolio is, why they are used and to identify some pieces of material that may be used to support claims for learning and development.

Subjects

ukoer | ukoer | Study skills | Study skills

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Fe, C 0.2 (wt%), explosively deformed - mechanical twins Fe, C 0.2 (wt%), explosively deformed - mechanical twins

Description

This sample was explosively deformed so that there was insufficient time for dislocation motion to occur. Hence, mechanical twins are produced despite the b.c.c. structure of mild steel. This sample was explosively deformed so that there was insufficient time for dislocation motion to occur. Hence, mechanical twins are produced despite the b.c.c. structure of mild steel.

Subjects

alloy | alloy | carbon | carbon | iron | iron | mechanical twins | mechanical twins | metal | metal | steel | steel | twinning | twinning | DoITPoMS | DoITPoMS | University of Cambridge | University of Cambridge | micrograph | micrograph | corematerials | corematerials | ukoer | ukoer

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Fe, C 0.15 (wt%) steel, quenched. Fe, C 0.15 (wt%) steel, quenched.

Description

A low carbon steel quenched in order to produce martensitic plates. A low carbon steel quenched in order to produce martensitic plates.

Subjects

alloy | alloy | carbon | carbon | iron | iron | martensite | martensite | metal | metal | quenching | quenching | steel | steel | DoITPoMS | DoITPoMS | University of Cambridge | University of Cambridge | micrograph | micrograph | corematerials | corematerials | ukoer | ukoer

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Kevlar fibre composite shear surface Kevlar fibre composite shear surface

Description

This is an image of the shear surface in a failed composite beam. 'Hackles' of matrix are clearly visible where shear has occurred within the matrix and it is also clear that shear has occurred across the fibre/matrix interface. The fibres are for the most part totally unscathed, though some mis-aligned fibres have become caught between the shear surfaces and 'fibrillated' by rolling and bending actions. It may be that this failure mechanism has been partly inhibited by poor fibre alignment since some off-axis fibres will reinforce the matrix in shear. It will have been promoted, however, by the extensive longitudinal voids. This is an image of the shear surface in a failed composite beam. 'Hackles' of matrix are clearly visible where shear has occurred within the matrix and it is also clear that shear has occurred across the fibre/matrix interface. The fibres are for the most part totally unscathed, though some mis-aligned fibres have become caught between the shear surfaces and 'fibrillated' by rolling and bending actions. It may be that this failure mechanism has been partly inhibited by poor fibre alignment since some off-axis fibres will reinforce the matrix in shear. It will have been promoted, however, by the extensive longitudinal voids.

Subjects

alignment | alignment | composite material | composite material | epoxy | epoxy | fibre | fibre | fibrillation | fibrillation | fracture | fracture | hackle region | hackle region | Kevlar | Kevlar | liquid crystalline polymer (LCP) | liquid crystalline polymer (LCP) | lyotropic | lyotropic | polymer | polymer | polymer composite | polymer composite | reinforcement | reinforcement | shear | shear | DoITPoMS | DoITPoMS | University of Cambridge | University of Cambridge | micrograph | micrograph | corematerials | corematerials | ukoer | ukoer

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Fundamentals of Materials Science: Diffusion Fundamentals of Materials Science: Diffusion

Description

This set of animations provides an introduction to the mechanisms and driving forces of diffusion. It demonstartes some of the processes in which it is observed. From TLP: Diffusion This set of animations provides an introduction to the mechanisms and driving forces of diffusion. It demonstartes some of the processes in which it is observed. From TLP: Diffusion

Subjects

diffusionsubstitutional | diffusionsubstitutional | interstitial | interstitial | random walk | random walk | Fick | Fick | law | law | DoITPoMS | DoITPoMS | University of Cambridge | University of Cambridge | animation | animation | corematerials | corematerials | ukoer | ukoer

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Physical layer technology and wireless systems level 1 part 1 : past exam questions

Description

This open educational resource was released through the Higher Education Academy Engineering Subject Centre Open Engineering Resources Pilot project. The project was funded by HEFCE and the JISC/HE Academy UKOER programme.

Subjects

ukoer | engscoer | cc-by | portsmouthunioer | university of portsmouth | electronic and computer engineering | examopediaukoer | Engineering | H000

License

Attribution 2.0 UK: England & Wales Attribution 2.0 UK: England & Wales http://creativecommons.org/licenses/by/2.0/uk/ http://creativecommons.org/licenses/by/2.0/uk/

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Spectrophotometry

Description

A video introduction to the spectrophotometer and principles of the Bradford Assay for determining protein concentration.

Subjects

spectrophotometer | spectrophotometry | bioukoer | ukoer | virtual analytical laboratory | val | Biological sciences | C000

License

Attribution-Noncommercial-Share Alike 2.0 UK: England & Wales Attribution-Noncommercial-Share Alike 2.0 UK: England & Wales http://creativecommons.org/licenses/by-nc-sa/2.0/uk/ http://creativecommons.org/licenses/by-nc-sa/2.0/uk/

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Intracellular and Extracellular buffers Intracellular and Extracellular buffers

Description

This RLO outlines the main intracellular and extracellular buffering systems within the body and shows how trhe carbonic acid buffering system can be assessed This RLO outlines the main intracellular and extracellular buffering systems within the body and shows how trhe carbonic acid buffering system can be assessed

Subjects

ukoer | ukoer | Clinical skills | Clinical skills | Science basics | Science basics

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Fe, Ni 30, C 0.3 (wt%), quenched - martensite plates Fe, Ni 30, C 0.3 (wt%), quenched - martensite plates

Description

This sample was quenched to -80 C to give a metastable martensitic microstructure. The martensite plates show a lenticular morphology as the material attempts to shear as it transforms but is unable to open up voids at the grain boundaries. The plates form in a similar way to mechanical twins but the shear processes lead to changes in crystal structure as well as crystallographic orientation. This sample was quenched to -80 C to give a metastable martensitic microstructure. The martensite plates show a lenticular morphology as the material attempts to shear as it transforms but is unable to open up voids at the grain boundaries. The plates form in a similar way to mechanical twins but the shear processes lead to changes in crystal structure as well as crystallographic orientation.

Subjects

alloy | alloy | carbon | carbon | iron | iron | martensite | martensite | metal | metal | metastable | metastable | nickel | nickel | quenching | quenching | DoITPoMS | DoITPoMS | University of Cambridge | University of Cambridge | micrograph | micrograph | corematerials | corematerials | ukoer | ukoer

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Pearlitic malleable cast iron Pearlitic malleable cast iron

Description

A cast iron with a relatively low carbon content. The sample has been normalised at 900 C for 72 hours in order to refine the grain size. The microstructure consists of pearlite with graphite. A cast iron with a relatively low carbon content. The sample has been normalised at 900 C for 72 hours in order to refine the grain size. The microstructure consists of pearlite with graphite.

Subjects

alloy | alloy | carbon | carbon | cast iron | cast iron | iron | iron | metal | metal | normalising | normalising | DoITPoMS | DoITPoMS | University of Cambridge | University of Cambridge | micrograph | micrograph | corematerials | corematerials | ukoer | ukoer

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