Mobile Communication Networks: Technologies and Protocols

Posted by on May 29, 2025 in Computer Engineering | 0 comments

Mobile Communication Challenges and Solutions

Basic Challenges of Mobile Communications and Solution Areas:

Challenges:

  1. Mobility: Mobile devices constantly change location, requiring seamless handovers between cell towers or base stations.
  2. Interference: Multiple devices sharing the same frequency spectrum can lead to signal interference.
  3. Attenuation and Fading: Radio channels can suffer from signal attenuation due to distance and obstacles, leading to signal fading.
  4. Bandwidth Limitations: Radio frequency
Read More

Essential Java Concepts for Developers

Posted by on May 28, 2025 in Computer Engineering | 0 comments

Java Platform Portability

Java is well-known for its ability to run on any device or platform thanks to the “Write Once, Run Anywhere” (WORA) philosophy. This is made possible because Java code is compiled into bytecode that runs on the Java Virtual Machine (JVM) instead of being compiled directly into machine code specific to any system.

How Java Achieves Portability

  1. Java Compiler and Bytecode: When you write Java code, it’s compiled into bytecode, which is platform-independent. This bytecode is
Read More

Essential Concepts in Computer Networking

Posted by on May 23, 2025 in Computer Engineering | 0 comments

Network Fundamentals & Data Communication

1. Understanding Computer Networks

  • A computer network is a collection of computers, servers, mainframes, network devices, and other resources that are connected together to share data and resources. Networks enable communication between devices, either locally (LAN) or over large distances (WAN).
  • Usage of Computer Networks:
    • Communication: Networks facilitate communication between computers, allowing users to send emails, chat, or transfer files over the
Read More

Understanding Set Similarity, Spatial Search, and Graph Algorithms

Posted by on May 16, 2025 in Computer Engineering | 0 comments

# 📚 Beyond Set Similarity, Spatial Similarity Search, and Graph Algorithms — DS-GA 1004: Big Data


## 🕛 Key Topics
– Locality-sensitive hashing (LSH)
– Bags/multi-sets similarity
– Spatial similarity search (vector database)
– Cosine similarity and LSH
– Graph-based relevance: PageRank


# 1. Locality-Sensitive Hashing (LSH)


## 💡 Key Use Cases
– Search: Content relevance via query-document similarity.
– Recommendation: Personalization from feedback.
– Graph algorithms: Relevance from network structure.

Read More

Java Singly Linked List Code Example

Posted by on May 15, 2025 in Computer Engineering | 0 comments

This document provides a Java code example for implementing a basic singly linked list data structure. The class is named TrainList and supports common list operations.

Java Linked List Code

The TrainList Class Structure

public class TrainList<X>
{
    Node<X> first;
    Node<X> last;

Adding Elements

The add Method

Adds an element to the end of the list.

    public void add(X value)
    {
        addLast(value);
    }
The addFirst Method

Adds an element to the beginning of the list.
Read More

Ejemplos de Código Java para Tareas Comunes

Posted by on Apr 22, 2025 in Computer Engineering | 0 comments

Método para Invertir una Cadena en Java

Este método toma una cadena de texto y devuelve una nueva cadena con los caracteres en orden inverso.


public String invertirCadena(String s) {
    String resultado = "";
    if (s == null) {
        return null; // O manejar como se prefiera
    }
    for (int i = s.length() - 1; i >= 0; i--) {
        resultado = resultado + s.charAt(i);
    }
    return resultado;
}

Método para Invertir un Array en Java

Este método invierte los elementos de un array

Read More