<?xml version="1.0" encoding="UTF-8"?>
<feed xmlns="http://www.w3.org/2005/Atom" xmlns:dc="http://purl.org/dc/elements/1.1/">
  <title>DSpace Collection:</title>
  <link rel="alternate" href="https://repositorio.ufu.br/handle/123456789/17890" />
  <subtitle />
  <id>https://repositorio.ufu.br/handle/123456789/17890</id>
  <updated>2026-07-31T05:40:56Z</updated>
  <dc:date>2026-07-31T05:40:56Z</dc:date>
  <entry>
    <title>Modulação OODN: modelagem estatística exata e avaliação de desempenho sob canais com desvanecimento</title>
    <link rel="alternate" href="https://repositorio.ufu.br/handle/123456789/48821" />
    <author>
      <name />
    </author>
    <id>https://repositorio.ufu.br/handle/123456789/48821</id>
    <updated>2026-07-15T06:26:11Z</updated>
    <published>2026-03-20T00:00:00Z</published>
    <summary type="text">Title: Modulação OODN: modelagem estatística exata e avaliação de desempenho sob canais com desvanecimento</summary>
    <dc:date>2026-03-20T00:00:00Z</dc:date>
  </entry>
  <entry>
    <title>Análise na perda de eficiência de produção de energia elétrica em usinas fotovoltaicas por efeito de sujidade</title>
    <link rel="alternate" href="https://repositorio.ufu.br/handle/123456789/47870" />
    <author>
      <name />
    </author>
    <id>https://repositorio.ufu.br/handle/123456789/47870</id>
    <updated>2025-12-18T06:23:21Z</updated>
    <published>2025-12-10T00:00:00Z</published>
    <summary type="text">Title: Análise na perda de eficiência de produção de energia elétrica em usinas fotovoltaicas por efeito de sujidade</summary>
    <dc:date>2025-12-10T00:00:00Z</dc:date>
  </entry>
  <entry>
    <title>Desenvolvimento de um sistema de levitação acústica controlado por microcontrolador</title>
    <link rel="alternate" href="https://repositorio.ufu.br/handle/123456789/47594" />
    <author>
      <name />
    </author>
    <id>https://repositorio.ufu.br/handle/123456789/47594</id>
    <updated>2025-11-07T06:23:11Z</updated>
    <published>2025-10-24T00:00:00Z</published>
    <summary type="text">Title: Desenvolvimento de um sistema de levitação acústica controlado por microcontrolador
Abstract: This work presents the development and validation of a didactic acoustic levitation &#xD;
prototype based on ultrasonic waves, aiming to provide an accessible and practical &#xD;
demonstration of standing wave concepts and acoustic resonance. The system was built using &#xD;
an Arduino Uno microcontroller, an L298N power driver, a 40 kHz ultrasonic transducer array, &#xD;
a 3D-printed structure, and a human-machine interface composed of a 16×2 LCD display and &#xD;
control buttons. The prototype allows real-time manipulation of acoustic excitation patterns, &#xD;
displaying on the LCD the active frame, nominal frequency, and relative amplitude index. Its &#xD;
low-cost, modular, and easy-to-replicate design ensures applicability in educational and &#xD;
laboratory environments. Experimental tests confirmed the formation of pressure zones capable &#xD;
of stably levitating microbeads, validating the system as a didactic tool for teaching acoustics, &#xD;
electronics, and applied physics. The prototype demonstrated simplicity, interactivity, and &#xD;
reliability, proving to be a feasible alternative for academic experiments and future &#xD;
improvements such as quantitative amplitude measurements and automated control of &#xD;
excitation patterns.</summary>
    <dc:date>2025-10-24T00:00:00Z</dc:date>
  </entry>
  <entry>
    <title>Parametrização de erros em switches de telecomunicações</title>
    <link rel="alternate" href="https://repositorio.ufu.br/handle/123456789/47320" />
    <author>
      <name />
    </author>
    <id>https://repositorio.ufu.br/handle/123456789/47320</id>
    <updated>2025-10-07T06:23:06Z</updated>
    <published>2025-09-22T00:00:00Z</published>
    <summary type="text">Title: Parametrização de erros em switches de telecomunicações</summary>
    <dc:date>2025-09-22T00:00:00Z</dc:date>
  </entry>
</feed>

