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1.2 Sexual reproduction

Sexual reproduction includes two distinctive processes:

  1. The production of haploid gametes, such as sperm and ova, which involves the specialized nuclear division called meiosis.

  2. The fusion of gametes at fertilisation, which results in the restoration of the diploid number of chromosomes.

The relationship between these two processes, and the changes in chromosome number that each process brings about, is
Author(s): The Open University

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Storm Adventures - Treago, KS Tornado
This tornado formed on June 5, 2005. The photographers shot this at only 200 yards away. It was moving in straight line towards them at 10 to 15 mph. (01:35) There is no sound.

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1.3.3 Ineffability

Most people who speak of their near-death experience say they have great difficulty putting it into words because, as one person put it, ‘There is no feeling you experience in normal life that is anything like this’.


Author(s): The Open University

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18.413 Error-Correcting Codes Laboratory (MIT)
This course introduces students to iterative decoding algorithms and the codes to which they are applied, including Turbo Codes, Low-Density Parity-Check Codes, and Serially-Concatenated Codes. The course will begin with an introduction to the fundamental problems of Coding Theory and their mathematical formulations. This will be followed by a study of Belief Propagation--the probabilistic heuristic which underlies iterative decoding algorithms. Belief Propagation will then be applied to the dec
Author(s): Spielman, Daniel

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Retailing in Leeds - Consumer Shopping preferences
Leeds is a major city in the UK and as such is a magnet for shoppers from the surrounding region. Around 1.7 to 1.9 million people are in the catchment area as shoppers in Leeds city centre. Consequently retail is an important business for Leeds. John Temperley Senior Lecturer in Marketing in the Business School and a retail specialist, explains the choices that face consumers and what their preferences are, based on research by students sponsored by Leeds city centre management. The results ar
Author(s): John Temperley,Leeds Metropolitan University

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2.4 Summarising conversation as what matters

Brian Wynne suggests that fundamental dichotomies associated with environmental matters underpin modern society – society versus nature, the social versus the natural, social knowledge versus natural knowledge, expert knowledge versus lay knowledge (1996, p. 45). The metaphor of conversation helps to move us beyond these dichotomous constructs and allows us to focus more on the integral relationships enmeshed in nature matters, relationships that I would argue are central to environmental r
Author(s): The Open University

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5 Conclusion

Photographs can be used as documentary data in the social sciences. Although they may seem to have a special relation to the events they depict, the social processes of image construction must be considered when we look at photographs as documents. Photographs are depictions of what took place, but are produced through a series of operations that must be understood in terms of their social organisation.

Only by understanding these operations, their social, economic, political and psycho
Author(s): The Open University

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2.3 Inverse proportion

In Section 2.2 you saw that direct proportion described relationships between two quantities, where as one increased, so did the other. Sometimes as one quantity increases the other decreases instead of increasing. This is called indirect proportion. Team tasks are often an example of this. The tim
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3.21 Conclusion

This extract has shown that CAM practice raises a variety of ethical issues. Although ethical considerations have different dimensions when applied to CAM, this extract demonstrated that ethical issues – such as consent, competence, boundaries and effective communication – remain central to good practice. CAM practitioners, like all other responsible health care workers, must be taught and encouraged to recognise the ethical dimensions of their work. All practitioners must be accountable
Author(s): The Open University

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Learning outcomes

By the end of this unit you should be able to:

  • conduct your own searches efficiently and effectively;

  • find references to material in bibliographic databases;

  • make efficient use of full text electronic journals services;

  • critically evaluate information from a variety of sources;

  • understand the importance of organising your own information;

  • identify some of the systems available;

  • describe how
    Author(s): The Open University

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The Temperaments by Ezra Pound (poetry reading)
A cuckold is a husband whose wife has been unfaithful to him. It was felt by some men to be the ultimate humiliation. The word cuckold is derived from cuckoo - a bird that lays it's eggs in other bird's nests, to be fed and nurtured by them. Impregnating another man's wife is a way of fathering children and escaping the cost and burden of fatherhood. But why did he "have to be four times cuckold". Would not once have been enough? "Wise are the Children in these dayes that know their owne
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Learning outcomes

After studying this course, you should be able to:

  • understand why and how innovation is important

  • recognise the benefits which innovation can confer on an innovating organisation.


Author(s): The Open University

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5.1 Introduction

Elite athletes are aware of the importance of heart performance and blood flow and many have specific training programmes to increase the strength and efficiency of the heart. This is not, however, just something that impacts on elite athletes. Even those of us engaged in sport at an amateur level or just for recreation will have experienced the effect of sport on the heart. After intense physical activity our heart pounds and possibly our head pounds too from the blood that is being pumped t
Author(s): The Open University

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Pinhaldigital, estrutura mnem?nica e processos multim?dia nas fazendas de caf?: Hist?ria, arquitetur
This article has two aims, first to discuss the use of mnemonic structures in multimedia processes with complex contents in the example of the research project and activity PinhalDigital. Moreover it intends to describe the transdisciplinar method used for the production of the application, developing didactic extracurricular and interdisciplinary activities in the areas of history, architecture and technology through the use of multimedia construction processes. PinhalDigital was born of an ini
Author(s): Anja Pratschke

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Study on the collaborative design process over the internet: A case study on VRML 2.0 specification
In this paper, we analyze the process of VRML 2.0 (Virtual Reality Modeling Language, Version 2.0) specification design for the deeper understanding of Internet-based collaboration. The VRML design process has the characteristics of being open to the public, geographically distributed, long-term, large-scale, and diverse. First, we examine the overall features of the design process by analyzing the VRML mailing list archive statistically. Secondly, we extract prototyping vocabulary (operational
Author(s): Ando, H., Kubota, A. and Kiriyama, T.

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1.782 Environmental Engineering Masters of Engineering Project (MIT)
This class is one of the core requirements for the Environmental Masters of Engineering program. It is designed to teach about environmental engineering through the use of case studies, computer software tools, and seminars from industrial experts. Case studies provide the basis for group projects as well as individual theses. Past case studies have included the MMR Superfund site on Cape Cod; restoration of the Florida Everglades; dredging of Boston Harbor; local watershed trading programs; app
Author(s): Lantagne, Daniele,Adams, Eric,Shanahan, Peter,Murc

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The Search for Extra-Terrestrial Intelligence
Talk given by Revd Dr David Wilkinson as part of summer course 2
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Geraldine the Giraffe Learns All About the /Yy/
In this cute video, Geraldine the Giraffe learns all about the letter /Yy/. She learns to form the letter correctly and searches her house for items that begin with letter /y/. She finds a yo-yo, yellow, yogurt, and yawn. This is a great resource to introduce and/or review alphabet sounds in the early childhood classroom. (3:24)
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3.5 Benzodiazepine tranquillisers, Prozac and the SSRIs

One of the most significant ranges of drugs ever produced is the benzodiazepine tranquillisers (usually classed as ‘minor tranquillisers’ or ‘hypnotics’), often prescribed as a remedy for ‘minor’ disorders such as depression, sleeplessness and anxiety. In effect, they extended the range of conditions that could be treated by medication. The best-known example is probably Valium.

Enabling Usage Rights for Adobe Reader
This video shows you how to take a PDF document and grant rights to Adobe Reader users. Also included, the Adobe Acrobat versions needed to enable these rights.
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