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2.3 Exploring for coal

Early miners would have found it easy to trace the distinctive black colour of coal along an outcrop (for example, a coastline or river valley), and surface trenches were used to locate less obvious outcrops. However, tracing an outcrop underground was problematical as the only means of exploration was by digging costly trial shafts. The development of exploratory steam-powered drilling in the early 19th century improved matters, but it was not until the mid- to late- 20th century that more a
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2.6 Milestones

As the first few months of a project go by, the long lists of possible tasks often create a sobering and sometimes frightening chaos. Time planning, such as that suggested in Sections 2.2 and Author(s): The Open University

References

Anthierens, S., Habraken, H., Petrovic, M. and Christiaens, T. (2007) ‘The lesser evil? Initiating a benzodiazepine prescription in general practice’, Scandinavian Journal of Primary Health Care, vol. 25, pp. 214–9.
Barbui, C., Toshiaki, A., Furukawa, T. and Cipriani, A. (2008) ‘Effectiveness of paroxetine in the treatment of acute major depression in adults: a systematic re-examination of published and
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Juf Erica : Blog vijfde leerjaar
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Op deze site vind je:

  • extra oefeningen
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Personal branding for career success
This free course, Personal branding for career success, considers what a personal brand is and whether you currently have one. You’ll look in detail at theories and examples of personal branding, and relevant marketing processes and practices. You’ll identify the values, skills, knowledge and expertise that you want to promote to employers, and consider different ways to build and present your own brand.Author(s): Creator not set

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Except for third party materials and otherwise stated (see http://www.open.ac.uk/conditions terms and conditions), this content is made available under a http://creativecommons.org/licenses/by-nc-sa/2

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Average global aerosol concentrations during the first half of October from 1979 through 1992, from Nimbus TOMS
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References

Bozinovic, F., Gallardo, P. A., Visser, G. H., Ortes, A. (2003) Seasonal acclimatization in water flux rate, urine osmolality and kidney water channels in free-living degus: molecular mechanisms, physiological processes and ecological implications. Journal of Experimental Biology, 206, 2959–2966.
Bulova, S. (2002) How temperature, humidity, and burrow selection affect evaporative water loss in desert t
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Timeline Eons App for iOS
'A graphic representation of the entire natural and human history.'• Scrollable timeline thousands of times longer than the Earth's circumference.• Editable time range that can span trillions of years into both the past and the future.• Zoomable timeline that can display dates and times down to a fraction of a second.• Extensive and wide-ranging events, from the Big Bang to historical events and future projections.• Concise and fun facts with links to additional external
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Dossier Mediawijs gamen
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Games zijn al niet lang meer weg te denken uit het leven van kinderen en jongeren. Ze leren, communiceren en experimenteren. Ze komen soms ook in aanraking met geweld en pesterijen. De lessen die ze hieruit trekken, kunnen breder toepasbaar zijn. …


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'The Space Shuttle fleet set high marks of achievement and endurance through 30 years of missions, from its first, when STS-1 launched on April 12, 1981, to its last, when STS-135 landed on July 21, 2011. Beginning with the orbiter Columbia and continuing with Challenger, Discovery, Atlantis, and Endeavour, the National Aeronautics and Space Administration’s (NASA) Space Shuttle has carried people into orbit; launched, recovered, and repaired satellites; conducted cutting-edge re
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'Noteshelf lets you take notes, annotate PDFs, sketch ideas, sign contracts, fill forms, print documents and more right on your iPad. Syncs with Evernote and works with all popular cloud services such as Dropbox, Google Drive and Box.Noteshelf prides itself as the only note-taking app that offers the most beautiful writing effect - this is one of the key reasons why our users fall in love with Noteshelf. It perfectly mimics that intuitive ink-on-paper feeling so smoothly, its as if you’re
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Figure 1 - 3D Builder Start Screen

 

3D object can be loaded using 3 different methods. One can either pick a model from the 3D Builder Library, load them fro
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5 Biomass conversion of solar energy

Photosynthesis in the geological past was responsible for all fossil fuel reserves, but its products are buried about 2000 times more slowly than we use them at present. The total carbon content of all biomass growing on land is estimated to be 5.6 × 1014 kg and, as Figure 10 shows, about one-fifth of this mass is renewed each year. Figure 6 shows how modern plant biomass is distributed across the continents. Clearly, biological conversion of solar energy to a chemical form in com
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GS-15: Automatic selection tools
Learn about the automatic selection tools in Photoshop Elements, which select areas of an image based on color and tone. Use with either Photoshop Elements version 7 or 8.
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Learn Italian with LearnItalianPod.com – Film dubbing is a big business in Italy. Almost all foreign movies are dubbed, and they are dubbed so well and so consistently that it is common for a single dubber to shadow the career of a foreign movie star for years. All major Hollywood stars are associated with very [...]
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ISS Update commentator Brandi Dean interviews NASA astronaut Alvin Drew about the Autonomous Mission Operations Test. Drew, who is the commander for the test, talks about the past, current and future tools astronauts would use when communicating at long distances and dealing with the time delay. Questions? Ask us on Twitter @NASA_Johnson and include the hashtag #askStation. For the latest news about the space station, visit http://www.nasa.gov/station.
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La localisation d'Anderson est un phénomène quantique imaginé par Phillip Anderson il y a plus de 50 ans pour comprendre le comportements surprenant de certains matériaux désordonnés à basse température. En physique de la matière condensée, on n'a que des indications indirectes de la validité de ce modèle. En revanche, ...
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1.2 Ethical examples

But is this a tenable position? In other words, is it only the people who use the technologies who carry the ethical burden? Conversely, is ethics of any interest to engineers, programmers and scientists? What, in the first place, constitutes an ethical issue? To begin examining these questions, let's look at some examples.

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