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 9534 result(s) returned

5.2 Material comparisons

I want to depart from the specific example of the bicycle to make some more general points.

In most simple structural analysis the self-weight of the structure is ignored, as it is considered to be small in comparison with the loads carried. However, as an illustration of engineering practice in the search for efficient structures to employ in product design, it is worth examining how the strength and weight of particular materials compare.

These comparisons are illustrated throug
Author(s): The Open University

License information
Related content

Copyright © 2016 The Open University

Bridging Health and Community with Pritpal Tamber

If health is an elusive concept, how much harder it must be to articulate what a healthy community should be. But that should not stop us from grappling with foundational ideas and from sketching a forward-looking vision for a better society. Our guest on this episode is Pritpal Tamber (twitter), a physician who has devoted his career to better understanding what it means to live in a healthy community.

Dr.
Author(s): No creator set

License information
Related content

The Diversity of Countries and Economies across the World
OpenStax College
By the end of this section, you will be able to: Analyze GDP per capita as a measure of the diversity of international standards of living Identify what classifies a […]

Author(s): No creator set

License information
Related content

The Sense of Taste
Do you have good taste? In this video segment, Dr. Linda Bartoshuk
explores the sense of taste in humans -- why we have it, and what
happens when we lose it. Learn why the sense of smell is also important to our experience of food. Footage from NOVA: "Mystery of the Senses: Taste."  Closed captioning included. Run time 04:18.




Author(s): No creator set

License information
Related content

Intro to Chemistry: 4.1 Converting Word Equations into Formulaic Equations (1/2)
Join award winning teachers Jonathan Bergmann and Aaron Sams as they interactively teach Chemistry: 4.1: Converting Word Equations into Formulaic Equations.  Diatomic elements are defined and a memory technique for remembering them is given ( BrINClHoF). 
( 7:44)

Author(s): No creator set

License information
Related content

9.520-A Networks for Learning: Regression and Classification (MIT)
The course focuses on the problem of supervised learning within the framework of Statistical Learning Theory. It starts with a review of classical statistical techniques, including Regularization Theory in RKHS for multivariate function approximation from sparse data. Next, VC theory is discussed in detail and used to justify classification and regression techniques such as Regularization Networks and Support Vector Machines. Selected topics such as boosting, feature selection and multiclass cla
Author(s): Poggio, Tomaso,Verri, Alessandro

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

Keep on learning

Study another free course

There are more than 800 courses on OpenLearn for you to choose from on a range of subjects. 

Find out more
Author(s): The Open University

License information
Related content

Copyright © 2016 The Open University

Acknowledgements

Except for third party materials and otherwise stated (see terms and conditions), this content is made available under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 Licence.

The material acknowledged below is Proprietary and used under licence (not
Author(s): The Open University

License information
Related content

Copyright © 2016 The Open University

2.3.3 Receptors with intrinsic enzymatic activity

Receptors with intrinsic enzymatic activity are the second biggest group of receptors after the GPCRs. They include four types according to the form of enzymatic activity of the intracellular domain (Figure 23a).

  • Receptor tyrosine kinases (RTKs) On activation, the kinase domain phosphorylates tyrosine amino
    Author(s): The Open University

    License information
    Related content

    Copyright © 2016 The Open University

3.2 Starting with learning outcomes

Figure 14

The creation of accessible eLearning or online learn
Author(s): The Open University

License information
Related content

Copyright © 2016 The Open University

1.4.2 Protein fold

Protein folds are often very extensive arrangements, combining elements of secondary and supersecondary structure. Some of the most common protein folds are described in Table 4  with examples of proteins that contain them. Notice that proteins can be conveniently divided into three classes, on the basis of the elements of secondary struct
Author(s): The Open University

License information
Related content

Copyright © 2016 The Open University

1.6.1 Thiamin (or thiamine, also known as vitamin B1)

The deficiency disease beriberi has been known for thousands of years. The name literally means ‘I can't, I can't’ in Sinhalese (a major language in Sri Lanka), and reflects the crippling effect on its victims, who suffer from neurological symptoms, including pain, fatigue and paralysis, and cardiovascular disease. The disease was most common in southeast Asia, where white or ‘polished’ rice was a major part of the diet. The main source of thiamin is in the outer layers of the grain,
Author(s): The Open University

License information
Related content

Copyright © 2013 The Open University

4.3 Who invented the telephone?

The popular image of Bell inventing the telephone, while it has some truth, is by no means the whole story. The two most significant players in the invention of a practical working telephone were Bell and Elisha Gray.

Gray was the co-owner and chief scientist of a company that manufactured telegraphic equipment. Bell's patent description had sound transmission as a minor purpose. But Gray's caveat declared that the main purpose of his device was ‘to transmit the tones of the human voi
Author(s): The Open University

License information
Related content

Copyright © 2016 The Open University

Project drift

Project drift is a common problem when one project leads into another without a clear break, or when extra tasks, which were not identified at the beginning, are added to a project. If possible, significant changes of the latter kind should be treated separately as a follow-on project: otherwise they may not be properly resourced and this can have adverse consequences for motivation of the project team.

<
Author(s): The Open University

License information
Related content

Copyright © 2016 The Open University

1.4 Decimal places

If you have less than one unit you should put a zero before the decimal point to make it easier for yourself and others to read the value (e.g. you should write 0.4 rather than just .4, as will be explained later in this course). However, how many zeros should you put after the last whole number in the series? For instance, is 0.4 the same as 0.40?

The short answer is that on one level, it is. However, by writing 0.40 we are saying that there are four tenths and zero hundredths,
Author(s): The Open University

License information
Related content

Copyright © 2016 The Open University

3.1 A two-fluid model

As was mentioned earlier, a substantial dose of quantum mechanics would be required to provide a full explanation of the properties of superconductors. This would take us too far away from electromagnetism, and we shall therefore restrict our discussion to aspects that can be discussed using classical concepts of electromagnetism.

We shall model the free electrons within a superconductor as two fluids. According to this two-fluid model, one fluid consists of ‘normal’ electron
Author(s): The Open University

License information
Related content

Copyright © 2016 The Open University

3.2 QSO spectra

It only became apparent that these quasi-stellar objects were not stars when their spectra were examined. At first astronomers could not interpret their spectra because the spectral lines did not appear at appropriate wavelengths for atoms of any known chemical element. The spectrum shown in Figure 4 provided the
Author(s): The Open University

License information
Related content

Copyright © 2016 The Open University

3.3 The London equations

A simple but useful description of the electrodynamics of superconductivity was put forward by the brothers Fritz and Heinz London in 1935, shortly after the discovery that magnetic fields are expelled from superconductors. Their proposed equations are consistent with the Meissner effect and can be used with Maxwell's equations to predict how the magnetic field and surface current vary with distance from the surface of a superconductor.

In order to account for the Meissner effect, the L
Author(s): The Open University

License information
Related content

Copyright © 2016 The Open University

Primeras impresiones sobre el cuento Apocalipsis

Actividad 21

En esta actividad podrá dar sus primeras impresiones sobre el cuento Apocalipsis y analizará en detalle lo que pasó, dónde y cuándo; también podrá descubrir desde qué punto de vista se narra el
Author(s): The Open University

License information
Related content

Copyright © 2016 The Open University

Project management: the start of the project journey
This free course, Project management: The start of the project journey, introduces projects, what they are, how they come about, responses to problems and planning. It explores the role of key players including the project manager, feasibility studies, decision making and project life cycles. First published
Author(s): Creator not set

License information
Related content

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

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