Active galaxies

Figure 6 shows a schematic optical spectrum of an active galaxy. It is immediately apparent that the emission lines are stronger and broader than in the spectrum of a normal galaxy shown in Author(s): The Open University

Active galaxies

Figure 10 shows the spectral energy distribution of an active galaxy.

Figure 10
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3.7 Protein phosphatases

Together with inositolphospholipid phosphatases, protein phosphatases are key regulators of signal transduction pathways. Like protein kinases, protein phosphatases are either tyrosine phosphatases (the majority of protein phosphatases, some of which are shown in Figure 44) or serine–threonine phosphatases (including the phosphoprotein phos
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3.4 Second messengers

In the previous section, we have discussed the principles of second messengers (Section 1.5) and, in particular, those produced by PLC (IP3 and DAG) and PI3 kinase (PI(3,4)P2 and PI(3,4,5)P3). We shall now consider the roles and mechanisms of action of the other chief mediators, which are Ca2+ ions, cAMP and cGMP
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9.1 The psychological arena

The examples in the previous section followed the traditional medical approach, namely that there is a disease, it can be diagnosed (identified), and the cause of the disease, be it viruses, bacteria, pathogens, genes or poisons, can be sought. This section moves away from the medical arena and into the psychological arena, where the symptoms are behavioural. In this case, the symptoms are socially unacceptable behaviour and to the list of causes just mentioned is added family circumstances a
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Photo Slideshow: The UA, a Local University with a Global Reach
Among other things, the University of Arizona is known for its scholarly research, the success of its athletics program and for having an active student body. But did you know that UA's community also has been praised in numerous other areas, such as community outreach, research abroad, expansive collections in the arts, the development of new technologies and methods and for its students who have gone on to become greatly successful alumni? There is so much more to know about this great institu
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A Jewish soldier from Eretz Israel in the British Army, describes meeting survivors in Italy
http://www.yadvashem.org/yv/en/exhibitions/dp_camps_italy/index.asp The exhibition “DP Camps and Hachsharot in Italy after the War”, brings the story of the many thousands of Holocaust survivors in the dozens of DP camps that operated in Italy after World War II. While these camps served as temporary transit stations for the survivors, it was there that they also started to cope with the enormity of their loss, at the same time preparing themselves for a new chapter in their lives with the
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2.4 Critical magnetic field

An important characteristic of a superconductor is that its normal resistance is restored if a sufficiently large magnetic field is applied. The nature of this transition to the normal state depends on the shape of the superconductor and the orientation of the magnetic field, and it is also different for pure elements and for alloys. In this subsection we describe the behaviour in the simplest situation; we shall discuss other more complex behaviour in Section 4.

If an increasing magnet
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7.06 Cell Biology (MIT)
This course deals with the biology of cells of higher organisms: The structure, function, and biosynthesis of cellular membranes and organelles; cell growth and oncogenic transformation; transport, receptors, and cell signaling; the cytoskeleton, the extracellular matrix, and cell movements; chromatin structure and RNA synthesis.
Author(s): Ploegh, Hidde,Orr-Weaver, Terry

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Content within individual OCW courses is (c) by the individual authors unless otherwise noted. MIT OpenCourseWare materials are licensed by the Massachusetts Institute of Technology under a Creative C

Purdue Day of Giving Krannert Challenge
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Understanding Logical Statements, Part 3 of 5 - Khan Academy
"Determine whether the statement is always, sometimes, or never true, and explain why." Sal Khan takes a mathematical statement and helps the viewer make sense out it. (03:12)
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2.7 Geological problems in coal mines

A modern coalface is a very complex operation that represents a large investment in terms of capital, labour and planning. Cutting machines and lengthy conveyors are inflexible and require uniform geological conditions to maximize output. What then are the effects of geological variations on such a mining system?

Geological factors control the selection of working areas. The two principal geological conditions that affect mining operations are, first, the nature of the coal-bearing rock
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Conclusion

This free course provided an introduction to studying Mathematics. 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.


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5 Conclusion

Domesticated organisms evolve in artificial environments under artificial selection, and opportunistic or enforced hybridisation often occurs between species that would not normally interbreed. Natural selection cannot be eliminated and continues to operate. At least two different forms of dwarfism are common in domesticated livestock and humans, but only the rarer midget type of dwarfism occurs in wild lineages. Domesticated mammals and birds have distinctive patterns of skin pigmentation th
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6.5 Summary of Section 6

Growth cones respond to proximal and distal cues. The proximal cues in the extracellular matrix or other cells affect adhesion and result in chemotactic guidance. Distal cues are also in the extracellular matrix but they diffuse through it and result in the growth cone either moving towards the source (attractants) or away from it (repellants). These distal cues are chemotropic cues and can have different effects on different growth cones; what may be an attractant to one growth cone may be r
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The Writing Process: You Can't Write Well Without It PowerPoint
This PowerPoint presentation is a review of the steps in the writing process.  It talks about prewriting, brainstorming, outlining, drafting, word choices, revising, proofing, and presenting.  This video itself is quite simple, but the information presented is very thorough.
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4.7 Build prototype/demonstrator

The physical models we talked about earlier are prototypes or demonstrators of a sort. However, for the purposes of making a clear distinction in the process, I'm referring here to prototypes or demonstrators as functioning preliminary models of the essential finished product or construction or service, bringing together all the elements of the design that may or may not have been previously physically tested (Author(s): The Open University

Up Close: Casey Coffman
The Senior Vice President, Corporate Strategy and Development for The Madison Square Garden Company discusses how sport and entertainment are closely knit, her leadership style, and her vision of how technology will influence the future of sport.

5.1 Introduction to key concepts

Before I go any further I will establish the meaning of some of the key concepts that you will encounter throughout this unit.

The key concepts elaborated in this unit are:

  • inventor

  • invention

  • design

  • product champion

  • entrepreneur

  • improver

  • innovation

  • dominant design

  • robust design

  • lean design

  • radical
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