2. Computational Thinking – How Stuff Works?
How does a Bank ATM work?
How does a Bar code system work?
How Google Maps work?
3. How does a Bank ATM work?
Bank’s Central
Computer
ATM
Location 1
ATM
Location n
ATM 1 ATM 1 ATM 1
Anatomy of an ATM
Other Bank’s
Central Computer
Transaction Flows
- Control hundreds of ATMs
- Keeps a master list of
transactions
One location can
have 1 or more
ATM counters
Customers of one bank
can use the ATMs of
other banks
At the close of every
business day, each bank’s
central computer calculates
- amount of money it owes
- is owed by other banks
4. Anatomy of a Bank ATM
Bank’s Central
Computer
ATM 1
Other Bank’s
Central Computer
ATM 2
Circuit Controller
Main Memory Central
Processing Unit
(CPU)
Auxiliary Storage
Controller
Satellite Circuit
Controller
Magnetic Tape Storage
Magnetic Disc Storage
Circuit Controller
Main Memory
Central
Processing Unit
(CPU) User-Machine
Interface
Controller
Keypad
Display Screen
Monitor
Unit Controller Card Reader
ATM Location – Aluva Parur Junction
5. ATM Transaction Flows
Customer inserts
Card
ATM reads Card
Code
Customer enters
PIN
Customer
requests a Cash
Withdrawal
ATM checks customer’s
account balance
ATM prints transaction
record
ATM returns Card
ATM dispenses Cash
Central Computer Update Balance
6. How does a Barcode system work?
DatabaseSupplier
Scanner Scanner
Store ComputerSales Sales
Central Computer
Computer
Link
• Scanner sends information in
the product’s bar code to the
store’s computer.
Databases, Cloud computing - hardware/software/networking as services, ERP Shared Services – Retailers / Suppliers
• The computer subtracts the
item from its inventory and
informs the central computer.
• Central computer reorders
products as needed.
7.
8. What are Barcodes?
A bar code’s secret language
Each bar code has room for 113 lines.
A black line corresponds to a binary 1, a
white line to a 0.
Every group of seven lines represents a
number, which appears below the code.
9. Anatomy of a Bar Code Scanner
Gun-type
Barcode Scanner
10. How Google Maps works?
How do Satellites map Earth?
How do Computers make Maps?
How Computers work in Cars to
show these Maps?
How Google Maps works on
Mobile?
11. How Satellites map Earth?
Computer images of Earth, as seen from orbit
- Produced by a fleet of remote sensing satellites
- Used by geologists, ecologists, cartographers, and other researchers
- Landsat, SPOT, ERS satellites
Landsat
Relay satellite
Earth station
14. How Map Databases created?
Computers completely changed Cartography
- They simplified the assembly and display of all the complex data that goes into a map
- Information on geomorphology, from aerial and satellite surveys is digitized and stored in
a computer for use in a variety of maps
- Existing maps can be scanned and digitized for use by a computer, then easily updated
- Data is digitized by moving a mouse over a map or structural drawing and entering
co-ordinates for each feature
- 3-dimensional data can be entered on a stereo digital photogrammetric station
(SDPS) by using the parallax, or apparent displacement, between aerial photographs
taken by separate cameras.
The same database that is used to make maps may also be used to create computer graphics
of the area being mapped
16. Instrumentation Panel in Cars / Google Maps on mobile
On-board Navigation System
- Car instrument displays have become increasingly computerized
- Needle gauges have been replaced by liquid crystal displays (LCDs)
- Head-up displays project readings from the car’s instruments onto a windscreen,
- helping the driver to see them while keeping his or her eyes on the road.
Google Maps APIs for Mobiles
17. Mujitha Bai K B
WhizThinkers
https://whizthinkers.com
THANK YOU!!
Editor's Notes
An ATM allows bank customers to perform simple banking functions such as deposits, withdrawals and transfers between accounts in a quick and easy manner. Introduced in the late 1960s, ATMs caught on by virtue of their convenience. Not only can they operate 24 hours a day at any location, but their small size allows them to be installed virtually anywhere.
When someone opens a bank account, the bank usually issues that patron, or customer, an ATM card. On the back of the card, in older versions, is a magnetic strip containing a coded number assigned exclusively to that card. For newer cards, there is an electronic chip. To use an ATM, the customer inserts the card into the machine and enters his or her personal identification number, or PIN, using the machine’s keypad. Then, the customer inputs his request, the transaction is carried out, and the ATM returns the access card.
An ATM allows bank customers to perform simple banking functions such as deposits, withdrawals and transfers between accounts in a quick and easy manner. Introduced in the late 1960s, ATMs caught on by virtue of their convenience. Not only can they operate 24 hours a day at any location, but their small size allows them to be installed virtually anywhere.
When someone opens a bank account, the bank usually issues that patron, or customer, an ATM card. On the back of the card, in older versions, is a magnetic strip containing a coded number assigned exclusively to that card. For newer cards, there is an electronic chip. To use an ATM, the customer inserts the card into the machine and enters his or her personal identification number, or PIN, using the machine’s keypad. Then, the customer inputs his request, the transaction is carried out, and the ATM returns the access card.
A bar code – the familiar sequence of black and white lines that appears on products sold in stores – is a binary code similar to that used by computers. The sequence of the alternating black and white bars enables manufacturers and retailers to encode and monitor a great deal of information about a product: its identity, its price, and its place of origin.
Landsat – These satellites circle the Earth at an altitude of around 700-900 kilometres. They swing from North Pole to South Pole and, as the Earth spins beneath them, they pass over each part of Earth’s surface every 15 to 20 days. With each orbit, a satellite concentrates on a single north-to-south strip of Earth below; for Landsats it is a 185-kilometre-wide strip
Instead of using cameras, some satellites have sensors called thematic mappers (TMs). Within the TMs are scanning mirrors that tilt back and forth, picking up light reflected from Earth’s surface.
This light passes through an optical system to a set of detectors that record the wavelengths and intensities of the light waves they receive, including the infrared light that is invisible to human eyes.
A computer then converts this information into digital code and transmits it through radio waves to an Earth station. When the digital signals are received on Earth, they are processed by computers and changed back into images.
The result is a remarkable graphic representation of portions of Earth, showing rivers, cities, forests, fields, glaciers, and more. Satellite images are especially helpful to scientists who study forests, the spread of agriculture, and changes in the cleanliness of the environment.
Because all this information is stored digitally in the computer, it can be rearranged in different ways to create maps for many purposes.
Different types of map information can be recorded together in separate layers of a computer database. The information can be retrieved separately or combined as needed.
Construction planning, Urban planning can use different layers of map databases (Road layer, Building layer, pipe layer)
