открытый урок "Принтеры"
план-конспект урока по английскому языку (10 класс) по теме

Урок по теме «Принтеры». 10 класс УМК “Information technology” E. Glendinning, J. McEvan

Цели урока:

1. Обучающая – обобщить знания учащихся о видах принтеров
2. Развивающая – способствовать развитию логического мышления, памяти, внимательности при выполнении заданий различного уровня сложности.
3. Воспитывающая - способствовать  формированию информационной культуры учащихся, развитию познавательной деятельности.

План урока

1. Мотивация учебной деятельности с частичным повторением. Проверка домашнего задания.
2. Обобщение знаний о внутренних устройствах компьютера.
3. Обобщение знаний о внешних устройствах компьютера.
4. Зарядка для глаз.
5. Знакомство с классификацией принтеров
6. Обзор технических новинок
7. Комментарий к домашнему заданию.
8. Подведение итогов урока.

Ход урока:
Мотивация учебной деятельности с частичным повторением.
Обсуждение плаката «Компьютер и информация». Учащимся предлагается объяснить, какие информационные процессы осуществляются устройствами компьютера и ответить на вопросы:

1. Name input devices.
2. Name output devices.
3. Name computer applications
4. What do you remember about computer architecture?.

Зарядка для глаз

Упражнение 7 страница 27.

Study this data about storage devices. Then complete the blanks in the following sentences comparing and contrasting the different types.

Упражнение97 страница 28.

Study this list of needs/ which type of peripheral would you advise in each case?

Презентация по теме «Принтеры»:

1. Dot matrix
2. Laser (Toner-based printers)
3. Liquid inkjet printers
4. Solid ink printers( a type of thermal transfer printer)
5. Dye-sublimation printers
6. A disassembled dye  with sublimation cartridge
7.  Inkless printers using special heat-sensitive paper
8. Monochrome thermal printers are used in cash registers, ATMs, gasoline dispensers and some older inexpensive fax machines. Xerox is working on an inkless printer which will use a special reusable paper coated with a few micrometres of UV light sensitive chemicals.  The text on the printed pages can only last between 16–24 hours before fading                    
9. Impact printers
   The impact printer uses a print head that either hits the surface of the ink ribbon, pressing the ink ribbon against the paper (similar to the action of a typewriter)
10. Pen-based plotters were an alternate printing technology once common in engineering and architectural firms
11. An ORDbot Quantum 3D printer Timelapse video of a hyperboloid object print (made of PLA) using a RepRap "Prusa Mendel" 3D printer for molten polymer deposition
12. Timelapse video of a hyperboloid object print (made of PLA) using a RepRap "Prusa Mendel" 3D printer for molten polymer deposition

• Additive manufacturing or 3D printing is a process of making three dimensional solid objects from a digital model. 3D printing is achieved using additive processes, where an object is created by laying down successive layers of material.[2] 3D printing is considered distinct from traditional machining techniques (subtractive processes) which mostly rely on the removal of material by methods such as cutting and drilling.
• 3D printing is usually performed by a materials printer using digital technology. Since the start of the twenty-first century there has been a large growth in the sales of these machines, and their price has dropped substantially.[3] 
• The technology is used in the fields of jewelery, footwear, industrial design, architecture, engineering and construction (AEC), automotive, aerospace, dental and medical industries, education, geographic information systems, civil engineering, and many others items.  To perform a print the machine reads in the design and lays down successive layers of liquid, powder, or sheet material, and in this way builds up the model from a series of cross sections. A model  was digitally acquired by using a 3D scanner, the scanned data processed using MeshLab, and the resulting3D model used by a rapid prototypingmachine to create a resin replica.                                        Full colour miniature face models produced on a Spectrum Z510 3D Printer
• Paper models, also called card models or papercraft, are models constructed mainly from sheets of heavy paper, paperboard, or card stock. Printer steganography is a type of steganography produced by color printers, including Brother, Canon, Dell, Epson, HP, IBM, Konica Minolta, Kyocera, Lanier, Lexmark, Ricoh, Toshiba and Xerox[1] brand color laser printers, where tiny yellow dots are added to each page. The dots are barely visible and contain encoded printer serial numbers and timestamps. Unlike many forms of steganography, the hidden information is not intended to be available from a computer file, but to allow serial number and time of printing to be determined by close examination of a printout.
• Color laser printers appear to be the type mostly involved, the measure being brought in during the 1990s by Xerox and other companies seeking to reassure governments that their printers would not be used for forgery. The identification is by means of a watermark, often using yellow-on-white, embedded in the printout of each page, and in conjunction with other information can be used to identify the printer which was used to print any document originally produced on a wide range of popular printers. It may be actual text, or a repeated pattern of dots throughout the page, more easily visible under blue light or with a magnifying glass, and is intended to produce minimal visible change to the printout, ideally being imperceptible to the naked eye.
• In 2005, the Electronic Frontier Foundation cracked the codes for Xerox DocuColor printers and published an online guide to their detection.[2] Most printers' codes have not been decoded, although the coding system framework and printer serial number encoding is the same on both DocuColor and the Epson Aculaser C1100/C1100N/A.

Now let’s watch the video: http://www.youtube.com/watch?v=1213kMys6e8

Просмотр видеоролика  “Hyperboloid Print”,

просмотр видеоролика  OMOTE 3D SASHKIN  KAN http://www.youtube.com/watch?v=POx6eWOr97I

Обзор технических новинок. (презентация)

Домашнее задание: упражнение 8 страница 28.

Write your own comparison of printer types.