Technology and its Impact on Society
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Technology: Creating Practical Solutions
Technology is creating practical solutions to satisfy human needs and problems.
Factors in the Technological Process
Physical and scientific concepts
Technical drawing
Materials and their properties
Work techniques
Economic factors
Information technology
Stages of the Technological Process
Needs and problems
Collecting information
Designing (drawing)
Planning (materials-tools-time-money-people in charge)
Building
Evaluating and checking
Writing a report
Materials for technical use
MATERIALS | SOURCES | PROPERTIES |
---|---|---|
Wood | Trees | Electrical insulator/Thermal insulator |
Plastic | Raw oil | Mechanical strength/Electrical insulator |
Metal and alloy | Minerals in rocks | Hard/Electrical insulator |
Textiles | Vegetables, Animals and oil | Elastic/Resistant |
Stone | Rocks | Thermal |
Blondin crane lifting
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General cargo Terminals. Classification: - Conventional: These terminals Are very old installations, which at the beginning did not move unitized cargo. Their layout is simple and in general they do not require large extensions for Cargo handling and manipulation. Distribution and dimensions, as well as Installations needed depend on the cargo type manipulation and they have open Storage areas as well as light storage facilities, silos and horizontal Storage. ¿How do they operate? For the cargo loading and discharging, They use mobile shore cranes with high lifting capacity between 20 to 30 mt, For the storaging and interconnectitvity, depends on the cargo presentation, They use: platforms, rolling cars and reach stackers and reclaimers. A.
... Continue reading "Blondin crane lifting" »Properties of Metals and Ferrous vs. Non-Ferrous Metals
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Properties of Metals
PROPERTIES OF METALS: good electrical, thermal and acoustic conductors; ductile and malleable; tough; they melt at high temperatures, expand when the temperature rises and contract when it cools; some are magnetic; rust when they come into contact with air and oxygen (not all); can be recycled and reused, some are toxic for the environment.
Ferrous Metals
FERROUS METALS: main component is iron.
PURE IRON: greyish white colour, good magnetic properties. Disadvantages: only melts at high temperature, difficult to machine, fragile and brittle. Uses: rarely used, used in electronics and electrical components. CAST IRON: very hard and resistant. Uses: machine parts, casing for engines, stands for machines, pistons, street lamps,... Continue reading "Properties of Metals and Ferrous vs. Non-Ferrous Metals" »
Introduction to Circulators, Diodes, Transistors, and Microwave Devices
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Circulator
A nonreciprocal device, means transfer function cannot be calculated inverse (output to input). The characteristic of this device depends on which direction the applied signal. It is based on magnetic ferrite and uses a ferrite core.
MW Semiconductor Devices
- Diodes: can be used for detecting MW signals. (Until the 1960s).
- -Schottky pin diodes are passive. Varactor, tunnel are active diodes. Gun impatt, trapatt. You can't use diodes with wires because this wire becomes inductive and stops MW signal. Connect diode chips with wire bonds (without connectors.)
- Schottky barrier diode: there are no minority carriers, so there is no delay (only majority). The operation speed is high, so it can be used in MW applications as a detector.
Cutoff Frequency
... Continue reading "Introduction to Circulators, Diodes, Transistors, and Microwave Devices" »Understanding TWT and Magnetron: Microwave Amplifiers and Oscillators
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Yukardaki TWT.
Resonant cavity
which is connected to the source RF signal.TWT is an amplifier and a Magnetron is an oscillator.
"length of electromagnetic waves"
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An electric circuit is route around which electrons circulate. It consist of a generatos, a cable, a switch and a receiver. Electric current is the flow of electrons around a circuit. We need a generator to maintain the current.
There are three types of materials:
-Conductors: allow electric currents to pass through them. Metals
-Insulators: don't allo electric current to pass through them. Plastics
-Semiconductors: they have properties between conductors and insulators. Silicon ang germanium
The electrical resistance of a material is a measure of degree to which the material opposes an electric current flowing through it.
-Metals have hardly any electrical resistance; insulator have very high levels of resistance
-Its value depend
electricidad
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¡Escribe tu texto aquí!the gears or sprockets are mechnical elements designed to trasmite turning movements
electricidad
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parallel circuits
Air law
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• Rock wool• Glass wool
Divided according to material density to: – very light products (density < 50 kg/m3); – light (density from 50 kg/m3 to 200 kg/m3 ); – heavy (density From 200 kg/m3 to 400 kg/m3 ).
According to compressibility (material affected by 2 kPa load) into: – Soft (compresses more than 30 %); – half rigid (compresses from 6 to 30 %); – Rigid (compresses not more than 6 %).
according to usage for constructions into: – general purpose: • not Withstanding loads (light carcass type) • Withstanding loads (molded concrete Floors) in constructions – outer walls; – flat roofs.
Raw material type is chosen depending on resistance to temperature (basalt wool from 1000ºC, dolomite wool 650ºC, glass 550ºC), fiber... Continue reading "Air law" »
Protecting Your Digital Identity and Backing Up Your Data
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Protecting Your Digital Identity
Person’s digital identity: Is all information that you can find about a person on the internet, written by itself or other people. It is important because if you are looking for a job, everyone can see it and you have to be aware.
Best Way to Back Up Your Information
Best way to do a backup of your information: First and foremost, you need to back up your personal files. You can always reinstall your operating system and redownload your programs if your hard drive fails, but your own personal data is irreplaceable. Any personal documents, photos, home videos, and any other data on your computer should be backed up regularly. Those can never be replaced. Your operating system, programs, and other settings can... Continue reading "Protecting Your Digital Identity and Backing Up Your Data" »