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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 15567 result(s) returned

4.1.2 Stateless servers

Web servers are what are known as stateless servers. What this means is that in their pure form they keep no memory of what has previously happened to them between requests; for example, when a request is processed by a web server for a page they have no direct knowledge about whether the page request was made by the same browser that asked for a previous page to be returned.

While this was not serious when web servers were being mainly used for dispensing documentation (their or
Author(s): The Open University

License information
Related content

Copyright © 2016 The Open University

4.1.1 Space problems

Probably the best known of these is the fact that the internet is running out of space for identifying computers. Each computer in a network needs to be identified by a unique data pattern known as an IP address. The current technology used to transport data around the internet is such that in the comparatively near future we shall run out of space to hold these unique addresses. Happily this is a problem that has been identified and groups of researchers around the globe have developed new t
Author(s): The Open University

License information
Related content

Copyright © 2016 The Open University

4.1 Legacy technology

The aim of Section 5 is to examine some of the issues and problems which affect the devekopment of Internet, e-commerce and e-business applications.

The World Wide Web was developed as a way of dispensing documentation within the large research laboratory at CERN in Geneva. I am sure that the originator of the technology, Tim Berners-Lee, did not realise at that stage how it would expand and become a major component of our economic infrastructure. Because many of the developers o
Author(s): The Open University

License information
Related content

Copyright © 2016 The Open University

3.4 Newsgroups

A newsgroup is a collection of internet users who are interested in a particular topic. The topic may be a technical one, for example the LINUX operating system, or a recreational one such as fly fishing. Members of a newsgroup send messages associated with a particular issue such as the date of release of the next version of LINUX or the efficacy of using certain fiies on certain rivers. Each message – known as a posting – will contain the user's thoughts on the topic. Once
Author(s): The Open University

License information
Related content

Copyright © 2016 The Open University

2.5.4 Change notification sites

These sites are a variation on link checking sites. Here, the customer is notified not when a web document becomes unavailable, but when the document is changed. For example, the customer might be interested in a particular page which advertises some holiday package offers to a particular destination and wants to keep abreast of any changes to the page which might signal the fact that a new improved offer has been added.


Author(s): The Open University

License information
Related content

Copyright © 2016 The Open University

2.5.3 Archive sites

These are websites which offer customers a facility for storing their files at a safe location. This guards against anything disastrous happening to the customer's computer and their losing valuable data. Often the files will be duplicated at a number of computers at different locations in order to guard against the possibility of one of the locations being affected by a natural disaster such as an earthquake, or a computer being affected by a catastrophic failure which results in its stored
Author(s): The Open University

License information
Related content

Copyright © 2016 The Open University

1.2 Commerce and the internet

There are a number of ways in which companies can make money from the internet. Probably the best known way of making money is by selling some commodity; this could be a non-IT commodity such as a CD or item of clothing or it could be some piece of application software, a font, a browser plug-in or an operating system. Other forms of revenue raising are:

  • Auction sites which auction items on the internet and make profits by taking some commission
    Author(s): The Open University

    License information
    Related content

    Copyright © 2016 The Open University

Learning outcomes

After studying this course, you should be able to:

  • detail what is meant by the term ‘e-commerce’

  • examine some typical distributed applications

  • detail some of the problems that are encountered when developing distributed applications

  • describe briefly some of the technologies that are used to support distributed applications

  • show how some of the technologies detailed in the course are used in concert to realise a typi
    Author(s): The Open University

    License information
    Related content

    Copyright © 2016 The Open University

Professional relationships with young people
In some people's eyes the development of relationships is a good end in itself, as it is in relationships that we express our humanity. Young people with few good-quality relationships in their lives often find that entering into informal relationships with adults who respect, accept, like and really listen to them is a new life experience. These relationships can offer the young people new perspectives on approaching, developing and managing quality relationships of their own. This free course
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

Youth work: Introducing policy
In this free course, Youth work: Introducing policy, we will look at the meaning of policy, how it works as a mechanism for persuading people to behave in particular ways, its role in shaping our understandings of young people, and the role practitioners can play in mediating and influencing policy. First published on T
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

Key skill assessment: Improving your own learning and performance
Learning new skills is what makes us human but can we improve how we go about learning new things in new situations? Learning how to learn can help you to understand what works for you and what doesn't when you set out to learn new skills, either for work, your education, training or everyday life. In this free course, Key skill assessment: Improving your own learning and performance, you will learn to recognise, use and adapt your skills confidently and effectively in different situations and
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

Using film music in the classroom
There are many approaches to using film music in the classroom including: a focus on pupil experience; a focus on the structure of composition; a focus on the relationship between music and image. This free course, Using film music in the classroom, explores them all. First published on Tue, 29 Mar 2016 as Author(s): Creator not set

Learning to teach: becoming a reflective practitioner
This is the third of four courses which comprise the course Learning to teach. Critical reflection is crucial to becoming a successful teacher. This free course, Becoming a reflective practitioner, explains what is meant by reflective practice and how to ensure that reflection leads to learning. As a beginner teacher you will encounter many contradictions and challenges in school; you will learn to teach in a particular context but will need to be able to transfer your learning to new contexts.
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

Introduction

This free OpenLearn course is taken from Portales: beginners' Spanish, an Open University language course that concentrates on Spanish as a tool for communication, but also provides some insights into Hispanic societies and cultures through authentic printed and audio materials. It will be of interest to all those who want to improve their language skills in order to communicate more easily and effectively in Spanish. This OpenLearn course is an adapted extract from the first edition o
Author(s): The Open University

License information
Related content

Copyright © 2016 The Open University

Attachment in the early years
This free course, Attachment in the early years, covers theory and research in the area of attachment in early childhood. In the 1950s, John Bowlby was the first person to develop a theory about the significance of early attachments between caregivers and very young children. His work has stimulated a massive and very productive field of research with important implications for childcare. This OpenLearn course describes Bowlby's theory and the work that has built on it, illustrated with video re
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

Introduction

Dance communicates ideas through movement and is an expressive art form. Students need to learn how to use their body in a safe and healthy way, whilst developing a wide-ranging movement vocabulary. This unit introduces some key skills and suggestions for how to develop these skills with students.

The use of different dance techniques can be an effective way of building vocabulary and developing different kinds of skills and abilities. Technical dance skills can form the foundation on w
Author(s): The Open University

License information
Related content

Copyright © 2016 The Open University

3.13 Stage 7: Checking and making arrangements - a week before the exam

Mistakes often happen because students are anxious and pressured for time when preparing for an exam. We suggest that, a week before the exam, you check and make notes along the following lines.

  1. The date and time of the exam.

  2. The whereabouts of the exam centre. If time is going to be at a premium on the day of the exam, it would be well worth checking how to get to the exam centre, and how long it will take. You can then decide on you
    Author(s): The Open University

    License information
    Related content

    Copyright © 2016 The Open University

3.6.2 Making learning posters

You may find that, rather than reducing notes to small summary cards, you prefer to produce large posters detailing key points on particular topics. Use pattern, colour, diagrams and drawings in your posters, and display them in parts of your home where you might have an opportunity to gaze at them for some time and absorb the information. One student we know put them around the bathroom! If you have a strong visual memory, then lively posters really help the remembering process.


Author(s): The Open University

License information
Related content

Copyright © 2016 The Open University

Keep on learning

Study another free course

There are more than 800 courses on OpenLearn for you to
Author(s): The Open University

License information
Related content

Copyright © 2016 The Open University

2.3 Coping with difficult parts

Salim and Lewis mentioned that they found some sections of Layard's article difficult. So did I; for example, anyone without a background in economics would have difficulty grasping the arguments in paragraphs 13 and 14.

So what should you do when you can't make sense of what you read? Should you search online to find out about taxation theory? For my own satisfaction I searched for a definition of ‘marginal rate of taxation’ just to get the gist of it. I also tried to write down th
Author(s): The Open University

License information
Related content

Copyright © 2016 The Open University

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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779