Pages 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 9843 result(s) returned

1.5 Non-molecular substances

Non-molecular substances defy attempts to pick out discrete molecules from their structures. One example is common salt, NaCl, which is built up from the tiny cubes shown in Figure 10a. Look first at the sodium at the centre of the cube.

Question 7


Author(s): The Open University

License information
Related content

Copyright © 2016 The Open University

7.2 Free-free radiation

The blackbody spectrum is emitted when thermally emitting matter is optically thick. Optically thin matter can also emit thermal radiation. Whenever a charged particle is accelerated it emits electromagnetic radiation. When the acceleration is due to the electric field of another charged particle the emitted radiation is called free-free emission or bremsstrahlung. (Bremsstrahlung is a German word meaning ‘braking radiation’.) The radiation emitted by an optically thin, ther
Author(s): The Open University

License information
Related content

Copyright © 2016 The Open University

9.05 Neural Basis of Movement (MIT)
Surveys general principles and specific examples of motor control in biological systems. Emphasizes the neural mechanisms underlying different aspects of movement and movement planning. Covers sensory reception, reflex arcs, spinal cord organization, pattern generators, muscle function, locomotion, eye movement, and cognitive aspects of motor control. Functions of central motor structures including cerebellum, basal ganglia, and cerebral cortex considered. Cortical plasticity, motor learning and
Author(s): Moore, Chris,Bizzi, Emilio,Sur, Mriganka,Schiller,

License information
Related content

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

4 course summary

The essential points of this course are as follows.

  1. The Sun is a star, emitting all types of electromagnetic radiation. The light that reaches Earth from the Sun comes mainly from the photosphere, although on its way to Earth it must pass through the chromosphere and the corona. Each of these parts of the Sun shows signs of magnetically driven activity.

  2. Electromagnetic radiation consists of waves that can travel through empty space an
    Author(s): The Open University

    License information
    Related content

    Copyright © 2016 The Open University

3.5 Summary of Section 3

Behavioural mechanisms for reducing water loss are integrated with physiology. While Dipodomys rests in a cool burrow, the nasal counter-current heat exchanger cools exhaled air, conserving water vapour evaporated from respiratory surfaces. Long loops of Henle operate as counter-current multipliers, producing highly concentrated urine. Desert foxes use panting for evaporative cooling, but high rates of evaporative water loss cannot be sustained; hence the crucial importance of dens for
Author(s): The Open University

License information
Related content

Copyright © 2016 The Open University

Glossary

CharacterisationThe revelation of character through techniques such as physical description, action, dialogue, interaction with other characters, and the depiction of thought, emotion and belief.
DialogicDescribes a narrative in which multiple voices, perspectives or discourses are present and engage and interact with eac
Author(s): The Open University

License information
Related content

Copyright © 2013 The Open University

6.2.13 Online trading

This business model encompasses the trading of financial instruments such as bonds and stocks via the internet. Online trading has been a feature of the financial industry for some time. However, it was carried out using internal networks. The internet has enabled the individual user to trade stocks and shares from home and has given rise to the term day trading.


Author(s): The Open University

License information
Related content

Copyright © 2016 The Open University

Conclusion

This free course provided an introduction to studying sociology. 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.


Author(s): The Open University

License information
Related content

Copyright © 2016 The Open University

2 Solar thermal energy

Solar heating of trapped air, water and solids has been used for centuries, but modern architectural design can enhance all three effects for space heating, hot water supply and heat storage. Such passive solar heating relies on short-wave radiation being absorbed by materials so that they heat up and then slowly re-emit long-wave radiation. The most obvious example is inside a greenhouse, where solar radiation that passes through the glass heats the inside air to temperatures well abo
Author(s): The Open University

License information
Related content

Copyright © 2016 The Open University

Energy storage - the missing link
Professor Peter Bruce of the the University of St Andrews talks about the need for a step change in the performance of energy storage devices for the future in order to help us achieve a low-carbon world.
Author(s): No creator set

License information
Related content

EN-5. Soil biodiversity (Vidéo)

With Etienne Hainzelin and Eric Blanchart, we will discover the third biotic boundary: the soils. They give several data regarding their important biodiversity, and they relate this biodiversity with the good functioning of the agroecosystems.


Author(s): No creator set

License information
Related content

2015 MLK Community Caregiver Award Nominees Tracey Terrell and Julie Coats
Julie Coats and Tracey Terrell were nominated for the Annual MLK Community Caregiver Award at Duke University Hospital. Here's their story.
Author(s): No creator set

License information
Related content

Acknowledgements

Grateful acknowledgement is made to the following sources for permission to reproduce material in this unit:

The content acknowledged below is Proprietary and used under licence (not subject to Creative Commons licence). See Terms and Conditions.

Text

Video materials

These extracts are taken from DD208 © 2008 The Open University.

Uni
Author(s): The Open University

License information
Related content

Copyright © 2013 The Open University

1.2.6 Defining global markets

Global markets for manufactured goods, as opposed to, say, primary commodities such as oil and timber, arose largely in the second half of the twentieth century as trade between countries intensified. The lowering of transport costs and the relative fall in trade barriers enabled firms in one country to compete with a domestic rival in another. The supply of manufactured goods across the globe as a result of worldwide demand, principally from the affluent economies, thus heightened competitio
Author(s): The Open University

License information
Related content

Copyright © 2013 The Open University

Acknowledgements

All other material contained within this course originated at the Open University.

Course image: craft_uas in Flickr made available under Creative Commons Attribution-NonCommercial-ShareAlike 2.0 Licence.

Don't miss out:

If reading this text ha
Author(s): The Open University

License information
Related content

Copyright © 2016 The Open University

5.5.5 Summary

In this section I've briefly considered the very contentious question of what digital representations mean, but this debate must be left to another course. I have also described some of the devices that take digital information back into the analogue world of sight and sound, presenting it in a form that is meaningful to human eyes and ears.


Author(s): The Open University

License information
Related content

Copyright © 2016 The Open University

BizBasics: "Wisdom of Crowds" with Yael Grushka-Cockayne
Find out why crowd sourcing is more accurate than relying on one expert when it comes to predictions. Learn from Darden School of Business Assistant Professor Yael Grushka-Cockayne. Professor Grushka-Cockayne teaches Multi-Criteria Decision Analysis and Behavioral Decision Making courses in Darden's MBA program at the University of Virginia. BizBasics is a Darden School of Business series designed to explain basic business concepts and business buzz words.
Author(s): No creator set

License information
Related content

Yusef Komunyakaa reads "The Great Migration" | The Migration Series Poetry Suite
Presented in conjunction with MoMA's exhibition "One-Way Ticket: Jacob Lawrence's Migration Series and Other Visions of the Great Movement North," the Poetry Suite includes readings of new poems written in response to Jacob Lawrence’s Migration Series from 10 highly esteemed contemporary poets, who were selected by poet and essayist Elizabeth Alexander. Yusef Komunyakaa is Global Distinguished Professor of English, New York University. He won the Pulitzer Prize for Poetry in 1994. His most re
Author(s): No creator set

License information
Related content

21F.031J Topics in the Avant-Garde in Literature and Cinema (MIT)
21F.031 examines the terms "avant garde" and "Kulturindustrie" in French and German culture of the early twentieth century. Considering the origins of these concepts in surrealist and dadaist literature, art, and cinema, the course then expands to engage parallel formations across Europe, particularly in the former Soviet Union. Emphasis on the specific historical conditions that enabled these interventions. Guiding questions are these: What was original about the historical avant-garde? Wh
Author(s): Scribner, Charity

License information
Related content

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

Virtual Maths - Shapes, Space and Measure, Theodolite Survey simulation
Simulation of using a thodolite to calculate the height of a building.
Author(s): Leeds Metropolitan University

License information
Related content

http://creativecommons.org/licenses/by-nc-sa/2.0/uk/

Pages 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493