Notes, summaries, assignments, exams, and problems for Technology

What is the Internet?

The internet is a worldwide system of interconnected computer networks. When you connect your computer to the internet via your Internet Service Provider (ISP), you become part of the ISP's network.

The World Wide Web Explained

The World Wide Web (WWW or 'web' for short) is the part of the internet that you can access using a web browser, such as Google Chrome, Microsoft Edge, or Firefox. It consists of a large number of web servers that host websites. Each website normally consists of a number of web pages, which can contain:

• Text
• Images
• Video
• Animation
• Sound

Understanding Intranets

An intranet is a network that works like the internet but is only available within a particular organization, not to the public. An intranet may have... Continue reading "Understanding the Internet and World Wide Web Basics" »

He has been a blacksmith for over 30 years and has created weapons for over 200 films. This is Man at Arms.

"The weapons of anime are always my favorite, and I know that the fans have been asking for this for a long time. This is Elucidator from Sword Art Online." He begins by sketching the Elucidator by hand and transferring the design onto 1075 SQT steel. Using a band saw with a bimetal blade, he cuts out the heart of the sword and refines the edges with a belt sander. He marks the internal cut with a soapstone marker and uses a plasma cutter to create the symbol. Another piece, cut from 3/8 gauge carbonized steel, will cover the main section. The edges are leveled, the surface is polished, and any leftovers are trimmed with a Dynafile.

Crafting

Mechanical Motion Transformation Systems

Rack and Pinion Mechanism

The rack and pinion mechanism has two parts: the rack, which is a straight bar, and the pinion, which is a gear. Both have teeth that interlock. When the pinion rotates, the rack moves. If the mechanism is reversible, the pinion also rotates when the rack moves.

Nut and Bolt Mechanism

This mechanism has two parts: a bolt with a spiral groove and a nut that turns around it.

• When the bolt is stationary, the nut rotates and moves along the bolt. This is used to fasten different parts together.
• When the bolt is mobile, it moves through the nut. We use this to lift loads.

Winch and Crank Mechanism

A winch is a cylinder that rotates around a horizontal axis. We attach a rope to a winch and... Continue reading "Mechanical Motion Transformation Systems Explained" »

Hello, I'm Laura and I'm going to talk about recycling.

1. Definitions of Computing Terms

• Computer: An electronic device including hardware and software used to work, play, and communicate.
• Hardware: The physical, external components that control the computer.
• Software: The intangible part of the computer that administers the components of the CPU.
• Application: A collection of code that creates a program, such as mobile apps or Microsoft Office.
• File: A computer resource used for recording data.
• File Format: A standard that defines the way information is encoded in a computer file.
• Computer Program: A collection of instructions that process data.

2. Functions of Excel Formulas

• SUM: Used to add or subtract numerical values.
• COUNT: Counts the number of cells that contain numbers.
• AVERAGE: Returns the arithmetic

Important Oracle SQL Data Dictionary Views

Important Oracle SQL tablespaces views include: dba_tablespaces, dba_data_files, dba_tables, user_types, user_source.

Creating Complex Object Types

CREATE OR REPLACE TYPE direccion AS OBJECT(
    calle VARCHAR2(50),
    numero NUMBER(3),
    piso NUMBER(2),
    puerto VARCHAR2(1),
    codpostal NUMBER(5),
    localidad VARCHAR2(50),
    provincia VARCHAR2(50)
);

CREATE OR REPLACE TYPE persona AS OBJECT(
    dni VARCHAR2(9),
    nombre VARCHAR2(50),
    apellido1 VARCHAR2(50),
    apellido2 VARCHAR2(50),
    telefono NUMBER(9),
    fecha_nac DATE,
    direccion direccion
);

Creating Tables Using Object Types

CREATE TABLE agenda OF persona;

DESC agenda; -- Visualize table structure


CREATE TABLE agenda2

Information Systems Explained

Definition of an Information System

An information system is a set of interrelated components that collect, process, store, and distribute information to support decision-making, coordination, and control within an organization.

Key Activities in an Information System

• Input: Capturing raw data from the organization or its external environment.
• Processing: Converting raw data into a more meaningful form.
• Output: Transferring processed information to the people or activities that will use it.

Understanding the Internet of Things (IoT)

Meaning and Impact of IoT

The Internet of Things (IoT) represents a revolution in the relationship between objects and people, connecting them to the network and enabling real-time data exchange.... Continue reading "Essential Digital Concepts: Information Systems, IoT, and Web Evolution" »

Azure Core Services & Features

Application Gateway & Web Application Firewall

• Service: Azure Application Gateway
• Feature: Web Application Firewall (WAF)

Messaging & Integration

• XML Message Handling: Azure Service Bus
• Recommended Serverless Solution: Azure Logic Apps and Azure Functions
• Event Grid C# Response: Azure Functions in Consumption Plan

Content Delivery & User Proximity

• Solution for Data Proximity to User: Content Delivery Network (CDN)

High-Performance Computing (HPC)

• HPC Cluster Node Management: CycleCloud

Application Hosting & Scalability

General Hosting Solutions

• App1 Hosting Solution: Load Balancer with VM Scale Set across two availability zones
• Service1 Hosting: VM Scale Set
• Deployment of Two VMs with Traffic Manager: Recommended
• VM

Resistors

• Longer side on positive
• Limit current through circuit
• Measured in ohms (Ω)

Voltage, Current, and Resistance

• Voltage (V): Exerted force to push electricity
• Current (I): Amount of electricity pushed (measured in Amps)
• Resistance (R): Constraints on the flow of electricity
• V = I*R, R=V/I, I=V/R

Diodes

• Act as stop-gap gates
• Ensure electron flow in intended direction

Motors

• Regular DC motors: Spin at various speeds
• Servo motors: Directional control, moving arm from controllable positions

Serial Communications

• Used to print values to Serial Monitor
• Good for troubleshooting

LEDs

• Light Emitting Diodes
• Light up when required forward voltage is found
• Intensity of light depends on current flow

Photodiodes

• Trip to reception of light, not emission of it
• Basics of solar