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Construction & Engineering Terminology: Definitions & Translations

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Construction and Engineering Terminology

Redesign (rediseño): Designing again in order to improve or change a design.

Regulations (Regulaciones): Laws and standards that a design must comply with, for example, safety regulations and quality standards.

Scale (Escala): The ratio between the size of items shown on a drawing and their actual size (in reality).

Schedule (horario): A list of planned activities or things to be done showing the times or dates when.

Set of (conjunto de): Collection/group.

Sketch (Boceto): A rough drawing of initial ideas, also used when production problems require engineers to amend design details and issue them to the workforce immediately.

Slab (Losa): The block of concrete that makes up a floor. It can be laid on the ground... Continue reading "Construction & Engineering Terminology: Definitions & Translations" »

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Understanding IoT: Components, Applications, and Future

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What is IoT?

Before 2010, people connected to the internet in what was called the 'Internet of People,' connecting people to apps and to other people.
In IoT 2020, people are connected to the internet, things are connected to the internet, and things are connected to things, connecting things to apps, to other things, and things to people.
IoT is about reusing the Internet Infrastructure and Technologies to connect things.
IoT is the combination of existing technologies + new opportunities + marketing and business.


Embedded Systems

Embedded systems are a combination of hardware and software that complete a specific task. Generally, they are parts of a machine and provide real-time operations with low power consumption, small size, safety, reliability,
... Continue reading "Understanding IoT: Components, Applications, and Future" »
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Understanding Electricity and Electronics: DC and AC

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Understanding Electricity and Electronics

Electricity

Matter is formed by atoms consisting of negatively charged particles (electrons) and positively charged particles (protons). Between these particles, there are forces of attraction or repulsion that generate a type of energy called electricity.

In a balanced atom, the number of protons is equal to the number of electrons. The forces of attraction and repulsion between these particles are balanced. When this balance is disturbed, the electrical forces become unbalanced and the electrons are driven by their electrical energy to other atoms in search of new balances.

We call this transfer of charges electrical current, and it is produced in conducting materials.

Conducting materials transmit electrical... Continue reading "Understanding Electricity and Electronics: DC and AC" »

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Fundamentals of Electrical Materials and Components

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Electrical Material Basics

Conductors: Materials that allow electrons to pass through them easily.

Insulators: Materials that prevent the passage of electrons. Examples include plastic, wood, ceramic, concrete, and stones.

Introduction to Electronics

Electronics is the branch of physics that studies the control of electron movement in semiconducting materials. Under normal conditions, these materials act as insulators. However, when certain factors are changed (such as electric fields, magnetic fields, or pressure), they become conductors. The most common semiconducting materials are silicon and germanium. Electronic circuits are primarily used to control and distribute information and have been crucial to progress in computing.

Key Electronic Components

  1. Resistor

    A

... Continue reading "Fundamentals of Electrical Materials and Components" »
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Search Engine Mechanics: Crawling, Indexing, and Ranking

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Search Engine Functions: Crawling, Indexing, Publishing

Crawling

The process by which search engine robots (also known as spiders or web crawlers) discover new and updated web pages and add them to the search engine index. They achieve this by performing an algorithmic scan to determine which pages to crawl, then follow links to interconnect content across the web.

Indexing

Once a document or web page is located, it is processed and stored in a vast database, making it available for user retrieval. Search engines maintain large data centers where their robots process all the pages and information gathered during crawling.

Serving Search Results

The primary goal of search engines is to provide an almost immediate and relevant answer to the user's... Continue reading "Search Engine Mechanics: Crawling, Indexing, and Ranking" »
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Mechanical Principles and Tool Applications Explained

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Mechanical Tool Usage Facts

A torque wrench is used to tighten a bolt when: The exact amount of force on the bolt has to be measured.

Taps and Dies Function

Taps and dies are tools used to: Cut threads for nuts and bolts.

Metal Pattern Creation

The type of pattern made on metal is created by a process called: Knurling.

Nail Sizing System

Which of the following uses a penny system to specify its size? Finishing nail.

Chimney Leak Prevention

What is placed around a chimney to prevent leaks? Flashing.

Sheet Metal Bending

Which tool is used to bend large sections of sheet metal? Brake.

Fastening to Sheet Metal

Self-tapping screws are primarily used when fastening objects to: Sheet metal.

Concrete Reinforcement

Anchor bolts are used to hold the: Rebar to the concrete.

... Continue reading "Mechanical Principles and Tool Applications Explained" »

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Understanding Gears: Types, Mechanisms, and Applications

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What are Gears?

Gears are mechanical elements designed to transmit turning movements.

Characteristics of Gears

Two main characteristics define a gear:

  1. Number of Teeth (Z): This characteristic represents the number of teeth on a gear.
  2. Rotational Speed (N): This characteristic represents how fast a gear rotates.

Gear Ratios and Speed Control

Different Number of Teeth

Using gears with different numbers of teeth allows us to modify a machine's rotational speed. If the output gear is larger than the motor gear, it will rotate slower. Conversely, if the output gear is smaller, it will rotate faster.

Same Number of Teeth

If two gears have the same number of teeth, they will rotate at the same speed.

Motor Gear vs. Output Gear

In a gear pair:

  • The motor gear initiates
... Continue reading "Understanding Gears: Types, Mechanisms, and Applications" »
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Essential Hand Tools for Electricians and Their Uses

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Pliars: The plier is a hand tool. It is my favorite tool. It is very useful for many kinds of different jobs; for example, it is useful for electricians. It is made of metal, plastic, steel, and other materials. It has a plastic handle, which is insulating. It is used for picking up objects and cutting wire; also, this tool is used for tightening wires. There are many kinds of pliers, like needle nose pliers, clamping pliers, lineman pliers, and side-cutting pliers.

Cutting Tools: It has a special insulating plastic handle and a steel blade. It is made of a lot of different colors. There are many kinds of cutting tools like cutters, electrician scissors, wire strippers, and hacksaws. These tools are very dangerous because they can cut your hands... Continue reading "Essential Hand Tools for Electricians and Their Uses" »

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Java List Implementation with Search, Insert, and Remove

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Java List Implementation

Class Definition

public class Lista { 
    private Object[] item;
    private int primeiro, ultimo, pos;

    public Lista(int maxTam) {
        this.item = new Object[maxTam];
        this.pos = -1;
        this.primeiro = 0;
        this.ultimo = this.primeiro;
    }
}

Search Method

public Object pesquisa(Object chave) {
    if (this.vazia() || chave == null) {
        return null;
    }
    for (int p = 0; p < this.ultimo; p++) {
        if (this.item[p].equals(chave)) {
            return this.item[p];
        }
    }
    return null;
}

Insert Method

public void insere(Object x) {
    if (this.ultimo >= this.item.length) {
        throw new Exception("Error: List is full");
    } else {
        this.item[this.ultimo]
... Continue reading "Java List Implementation with Search, Insert, and Remove" »
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MPEG Compression Standards: Video and Audio Formats

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MPEG Compression Standards

MPEG-1

  • Designed for up to 1.5 Mbit/sec.
  • Standard for the compression of moving pictures and audio.

This was based on CD-ROM video applications, and is a popular standard for video on the Internet, transmitted as .mpg files. In addition, level 3 of MPEG-1 is the most popular standard for digital compression of audio—known as MP3.

MPEG-1 is the standard of compression for Video CD, the most popular video distribution format throughout much of Asia.

MPEG-2

  • Designed for between 1.5 and 15 Mbit/sec.
  • Standard on which Digital Television set-top boxes and DVD compression is based. It is based on MPEG-1, but designed for the compression and transmission of digital broadcast television.
  • The most significant enhancement from MPEG-
... Continue reading "MPEG Compression Standards: Video and Audio Formats" »
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