3.4 The Eddington Limit Thus the observations require that a luminosity of around 100 times that of the entire Milky Way Galaxy be generated within a region with a diameter only about 1000 times that of the Earth's orbit! (A truly amazing statement.) The most obvious mechanism for generating such enormous luminosity within such a tiny region of space is an accretion process, but instead of perhaps more familiar compact stars with masses ~M
Acknowledgements SPECIAL RESTRICTIONS – THIS COURSE MAY NOT BE ALTERED. SEE CREATIVE COMMONS LICENCE. The materials for this course (W223) Company law in context have been made available by The College of Law for use in OpenLearn under a Creative Commons Attribution-non-commercial-No-Derivative Works 2.0 licence. This means that the materials may be used with acknowledgement to The College of Law for non-commercial purposes only and may not be altered or adapted in any way without prior permiss
3.6 Protein kinases Protein kinases phosphorylate proteins either at tyrosine residues (tyrosine kinases), or at serine and threonine residues (serine–threonine kinases), or on any of these three amino acids (dual-specificity kinases). All these activities are employed in signal transduction pathways (histidine kinases also operate in certain plant and bacterial pathways, but not in animals). You should now be familiar with receptor tyrosine kinases, and have seen in some detail how phosph
6.1 Concentrating energy As far as human needs are concerned, there is a marked difference between 'dilute' and 'concentrated' energy. Water vapour in the atmosphere, for example, has considerable Author(s):
1.3: Summing vectors given in geometric form The following activity illustrates how the conversion
processes outlined in the preceding sections may come in useful. If
two vectors are given in geometric form, and their sum is sought in
the same form, one approach is to convert each of the vectors into
component form, add their corresponding components, and then convert
the sum back to geometric form. 8.5.2 Diario hablado Rearrange the following short dialogues, each of which contains fixed expressions that you have learned in this session, and read them out on your blank tape. Ordene los diálogos y léalos en su cin 1 From drop-towers to Oblivion - some applications of linear motion We have all experienced that momentary feeling of lightness when an elevator begins its downward motion. It is almost as if our weight had suddenly been reduced or, conceivably, that the pull of the Earth's gravity had decreased for a moment. But imagine what it would be like if the lift cable had suddenly snapped and the lift, with you in it, had plummeted downward. Apart from stark terror, what else do you think you would experience during your fall? What would the physical experience 3 Somatic gene therapy There is a distinction between somatic cells, those making up almost all of the body, and germline cells, which are the eggs and sperm and the cells that produce them. Somatic gene therapy is the transfer of genes into the somatic cells of the patient, such as cells of the bone marrow, and hence the new DNA does not enter the eggs or sperm. The genes transferred are usually normal alleles that could ‘correct’ the mutant or disease alleles of the recipient (see Study Note 2: The 2 Contribution and roles Hilary Cremin et al. (2003), in their evaluation of the ways in which teachers and teaching assistants can work together in teams, suggest that, while there is enthusiasm for additional support, little attention is given to how this actually works in classrooms. It is true that learning support staff have been introduced into classrooms without clear research evidence that they can make a difference to children’s learning, but then life often moves faster than the supply of research evidenc Keep on learning   There are more than 800 courses on OpenLearn for you to choose from on a range of subjects. Find out more 1.5.1 Light-gathering power One of the key benefits of using a telescope is that it enables fainter objects to be detected than with the naked eye alone. The light-gathering power of a simple telescope used with an eyepiece is defined as where Do is the 4.2.2 Using the web more effectively: gateways A gateway on the web is a website intended to direct users to other preselected websites containing information on a particular topic. It can also refer to a computer that acts as a message router on the internet University librarians often set up gateways for particular areas of study, although they may be set up by anyone with sufficient expertise in a topic. Gateways may be fairly general, such as a gateway site for sciences, or more specific, such as a gateway for part 6.3.3 Photomultiplier tubes and detection circuitry The visible photons are collected by an array of photomultiplier tubes behind the crystal. These convert each visible photon to an electron and then multiply the number of electrons sufficiently to give a voltage pulse. Because the number of visible photons is proportional to the energy of the incoming gamma ray, the height of the pulse depends on this energy. This gives a method of counting the numbers of gamma photons at different energies that reach the crystal. A resistive network c New Virtual Reality for Architectural Investigations A Young Man's Progress - The First Book of Fashion 2.4.1 Interdependence The definition suggests that it is a simple matter to recognise the carer in a given situation. In some, perhaps most, care relationships this is true. However, the case of the Durrant family is complicated. Both Arthur and Lynne are included in categories often seen as needing the services of a carer – Lynne has a learning disability, Arthur's health is impaired by illness. But both have a claim to be seen as carers, too. Glossary Click on the link below to open the course glossary. 3.3 Thinking about modes of access Conclusion This free course provided an introduction to studying Health and Social Care. 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. 1.4 The discovery of tidal heating The Voyager fly-bys of the Jupiter system convinced planetary scientists that former preconceptions about 'dead' globes were wrong - even before Voyager 1 had got as far as Saturn, the mission had enabled them to identify a new heating mechanism to explain the discrepancies. The ease with which this revolution in thought was brought about was thanks to some of the Voyager images of Io, Jupiter's innermost Galilean satellite. Io is only a fraction larger and denser than the Moon, and so by rig
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Visually decoding and evaluating digital 3D models in proper scale on screen from within 3D modelling software can be quite difficult due to random zoom-factors, Field of View (FOV) and eye height. Motion and interactive bodily grounded examinations are helpful factors that can be enhanced with the use of Virtual Reality (VR). The purpose of this phenomenological study is to address these difficulties of perception of scale by introducing a Virtual Reality Head Mounted Display (HMD) as an explor
A Young Man's Progress is art work by London photographer Maisie Broadhead and fashion designer Isabella Newell in collaboration with Cambridge cultural historian Ulinka Rublack. This work responds to images of a Renaissance man's fashion styles recorded by Matthäus Schwarz (1497-1574), head accountant of a merchant firm in Augsburg, who put together 137 images of himself in the First Book of Fashion.
This unique series of paintings form a portrait of a life through Schwarz’s choice of clot
