2.6.1 Connectors Many techniques have been used to design connectors that align the fibre ends accurately with high reliability and a long lifetime. The development of such components, at a low enough price, has been an important part of the overall development which has made fibre a feasible proposition for commercial transmission systems. With fibre attenuation down to 0.2 dB km−1 (for single-mode fibre), the losses resulting from connectors and splices can be very significant over a whol
4.7 Summary Water in its 'natural' state supports a complex, yet fragile, ecosystem. The ability of natural watercourses to sustain aquatic life depends on a variety of physical, chemical and biological conditions. Biodegradable compounds, nutrients and dissolved oxygen must be available for the metabolic activities of the algae, fungi, bacteria and protozoa which are at the lowest level of the food chain. In addition, plant and animal growth cannot occur outside narrow ranges of temperature and pH. Susp
4.6 Tidal rivers and estuaries Most of the major cities and harbours in the world are located on estuaries. The estuarine ecosystem is a unique intermediate between the sea, the land and fresh water. A rather precise definition of an estuary is 'a semi-enclosed coastal body of water, which has a free connection with the open sea, and within which sea water is measurably diluted with fresh water derived from land drainage'. This excludes large bays with little or no freshwater flow, and large brackish seas and inland
2.8 Surface run-off In some inland drainage areas, all water is removed by evaporation and infiltration. However, precipitation not penetrating the land surface usually runs off the surface along defined channels which have been produced by geological processes, previous storms, or possibly by people. This accelerates the process. Its eventual destination is the ocean, except, of course, where it runs to inland seas such as the Dead Sea. It is in the runoff phase of the cycle that physical intervention by humans
Inuit Throat Singing
In many cultures, song is perhaps one of the most important traditions. What is extraordinary about the Inuit musical tradition is the way they create their songs - with notes originating from their throats. The song isn't interrupted even when a breath has to be taken. The 6 tracks in this album focus on Tanya Tagaq, who describes the amazing art of throat singing and how her heritage and culture, carried in her heart forever, has driven her to continue with this unique tradition. This mater
3.4 Characterisation and sexual stereotyping In attempting to characterise their sitters, 19th-century commercial photographers did not intend or attempt any serious psychoanalytical exploration of individual character such as we perceive it today in our post-Freudian world. They sought instead to stereotype by age and sex within a narrow range of positive virtues, which had previously been approved, within the conventions of painting: modesty, simplicity and chastity for women; dignity, strength and nobility for men.
2.6 Houses at Carthage, Bulla Regia and Thugga Your next activity is to watch a video on houses of the Roman élite. The video presents houses from different parts of the empire. Houses of the Roman élite (part 1 (Intro); 2 minutes) 1 Technological advancement Everything that can be invented has been invented. (The Commissioner of the United States Office of Patents, 1899, recommending that his office be abolished, quoted in The Economist, 2000, p. 5) There is nothing now to be foreseen which can prevent the United States from enjoying an era of business prosperity which is entirely 4.3.1 Confidentiality, integrity and availability To preserve the value of an information asset, an organisation needs to sustain simultaneously its scarcity and its shareability within their respective regions. This is the critical high-level information security goal for any information asset; it is the entire rationale of an information security management system. To maintain the security of an information asset, an organisation must: either make the information asset unavailable in it Chartered teachers in Scotland Introduction The underlying premise of this course is that we are all experts in different ways, and that our different experiences and understandings are of value. Inclusive education is presented and discussed as under construction, both in educational settings and as a concept. The materials to be found in this course are largely rooted in the social model of disability and human/disability rights frameworks. This OpenLearn course provides a sample of Level 2 study in Author(s): Learning outcomes After studying this course, you should be able to: demonstrate a strategy for using skills in improving learning and performance over an extended period of time monitor progress and adopt a strategy, as necessary, to achieve the quality of outcomes required evaluate this overall strategy and present the outcomes of the work. 3.1 Introduction The binding of features emerges as being a very significant process when displays are brief, because there is so little time in which to unite them. With normal viewing, such as when you examine the letters and words on this page, it is not obvious to introspection that binding is taking place. However, if, as explained above, it is a necessary precursor to conscious awareness, the process must also occur when we examine long-lived visual displays. Researchers have attempted to demonstrate th 2.6 Summary of Section 2 The results of the visual attention experiments we have considered can be interpreted as follows. Attention can be directed selectively towards different areas of the visual field, without the need to re-focus. The inability to report much detail from brief, masked visual displays appears to be linked to the need to assemble the various information components. The visual information is captured in parallel, but assemb 4.1.1 Disability discrimination legislation This activity uses the UK Disability Discrimination Act (DDA) Part 4 as the basis for discussing the concept of making reasonable adjustments. The DDA may not apply to you directly, but many countries have similar legislation. We feel the underlying principles of such legislation reflect the moral standpoint or the right thing to do, regardless of whether or not legislation exists. 4.1 Design guidelines and their limitations Having considered practical accessibility measures we can implement in creating eLearning materials, we now take a closer look at the guidelines that are available to support the development of accessible resources. Guidelines are available from many different sources and cover a variety of learning environments, however they are unlikely to resolve all accessibility issues in any given eLearning context, and should not be treated as a complete solution. 2.3.1 An essentialist perspective One way of understanding apparent differences in people’s behaviour and needs is to account for them as a direct result of their membership of a particular social group or category. For example, it might be suggested that a patient expresses herself in a very physical way because she is of African-Caribbean origin, and therefore because of certain innate biological or psychological attributes shared by all members of that ethnic group. Or it might be argued that a male manager behaves aggre 1.6.1 Introduction The process of keeping up-to-date in your chosen subject area is useful for your studies and afterwards, for your own personal satisfaction, or perhaps in your career as part of your continuing professional development. There are a great many tools available that make it quite easy to keep yourself up to date. You can set them up so that the information comes to you, rather than you having to go out on the web looking for it. Over the next few pages, you will be experimenting with some 1.4.7 T is for Timeliness The date when information was produced or published can be an important aspect of quality. This is not quite as simple as saying that 'good' information has to be up to date. Here is an example of a news item from an onli 1.6.4 D. Worker as community developer Young people are a fully contributing part of their communities already and their views and interests need to be taken as seriously as those of any other grouping. It's the adults’ role to help articulate their needs and concerns and to give them information and support to help them communicate these appropriately in the right quarters. Adults may need to act as advocates with or on behalf of young people to ensure their voice is heard. Young people also have responsibilities in relation to
Teachers often have little spare time to reflect on the day's lessons and challenges. However, this evaluation of teaching and learning experiences is vital to their professional development. This free course, Chartered teachers in Scotland, is an extract from the OU's Chartered Teacher Programme for Scotland and will help teachers to evaluate their practice and development opportunities.Author(s):
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