Computer Engineering Archives - Page 5 of 12 - Student Notes

Multiplexers, WAN, and LAN Network Technologies

Posted by admin on Mar 7, 2025 in Computer Engineering | 0 comments

Multiplexer Types

Frequency Division Multiplexer (FDM): Divides the bandwidth of a line among several channels. Each channel occupies a portion of the total frequency bandwidth.

Time Division Multiplexer (TDM): Each channel is assigned a specific time slot within the main channel. Time slots are shared equally among all channels. A disadvantage is that if a channel is unused, its time slot remains unused; other channels cannot utilize it. Padding bits are sent instead of data.

Statistical Time Division

C++ Algorithm and Data Structure Code Examples

Posted by admin on Mar 6, 2025 in Computer Engineering | 0 comments

Eratosthenes

Prime Number Checker

This code checks if a given number is prime using the Sieve of Eratosthenes algorithm.

#include #include #include using namespace std; const int Max = 1000; int main() { vector es_primer(1000001, true); es_primer[0] = es_primer[1] = false; for (int i = 2; i < Max; ++i) { if (es_primer[i]) { for (int m = 2 * i; m <= Max * Max; m += i) { es_primer[m] = false; } } } int x; while (cin >> x) { cout << x; if (es_primer[x]) cout << " es primer" <

Java Code for Queue and Stack Data Structures

Posted by admin on Mar 5, 2025 in Computer Engineering | 0 comments

Queue Class

First, we import the ArrayList class:

import java.util.ArrayList;

This is the Cola (Queue) class, which extends ArrayList:

public class Cola extends ArrayList {
    public void encolar(Object dato) {
        if (dato != null) {
            if (!esLlena())
                this.add(dato);
            else
                System.out.println("La cola esta llena.");
        } else {
            System.out.println("Introduzca un dato no nulo");
        }
    }

    public void encolar(int pos,

Pneumatic, Hydraulic, Linear, and Piezoelectric Actuators

Posted by admin on Mar 5, 2025 in Computer Engineering | 0 comments

Pneumatic Actuators

A pneumatic actuator is a mechanical device that converts compressed air pressure into mechanical motion or force. It’s commonly used in various industrial applications to control valves, dampers, gates, and other mechanical components. Pneumatic actuators are preferred for their simplicity, reliability, and suitability for high-force applications in environments where electrical actuators may not be practical or safe.

How Pneumatic Actuators Work

Pneumatic Power Source: Pneumatic

Understanding Signals: Phase, Frequency, and Modulation

Posted by admin on Mar 2, 2025 in Computer Engineering | 0 comments

Signal: A sequence of voltage changes characterized by phase, amplitude, and frequency.

Phase: A measure of the relative position in time within a single period of a signal.

Amplitude: The instantaneous value of the signal at a given time.

Frequency: The number of repetitions per unit of time, measured in Hertz (Hz). It is the inverse of the period.

Hertz (Hz): Equivalent to one cycle per second.

Signal Spectrum: The range of signal values from minimum to maximum frequency.

Digital Signals: Discrete signals

Network Cables and Components: Types and Uses

Posted by admin on Mar 1, 2025 in Computer Engineering | 0 comments

Twisted Pair Wiring

Twisted pair cables consist of pairs of insulated copper wires twisted together. This twisting helps reduce electromagnetic interference (EMI) and crosstalk.

Types

There are two main types: Unshielded Twisted Pair (UTP) and Shielded Twisted Pair (STP). UTP is common for Ethernet, while STP has additional shielding for better EMI protection.