<?xml version="1.0" encoding="utf-8"?>
<export-example>
  <doc>
    <id>215</id>
    <completedYear/>
    <publishedYear>2017</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber>90</pageNumber>
    <edition/>
    <issue/>
    <volume/>
    <type>bachelorthesis</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>2018-04-09</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>2017-04-28</thesisDateAccepted>
    <title language="eng">Hardware Design and RF Performance Evaluation of a Long Range 2.4 GHz Radio Module</title>
    <abstract language="eng">Low–power, long–range wireless solutions are needed for transmission of environmental and industrial monitoring data from remote, battery–driven sensors. Chirp spread spectrum (CSS) modulation techniques are able to meet these requirements. A CSS–based radio module was designed to operate in the 2.4 GHz frequency band, whose advantages are worldwide availability, lack of duty–cycle restrictions and a broad spectrum. The module’s power consumption is satisfactory, but its range has to be improved. The accuracy of time-of-flight (ToF) distance estimation, an extra feature of the module, has not been evaluated. Impedance matching, transmission lines and printed circuit board design are among the practical aspects discussed, while ToF ranging and orthogonality of CSS signals are considered from a theoretical point of view.</abstract>
    <identifier type="urn">urn:nbn:de:hbz:1383-opus4-2158</identifier>
    <licence>CC BY-SA 4.0 International - Namensnennung-Weitergabe unter gleichen Bedingungen</licence>
    <author>Marcel Dogotari</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Long–range radio module</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Printed circuit board design</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Transmission lines and impedance matching</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Chirp spread spectrum</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Time-of-flight ranging</value>
    </subject>
    <collection role="ddc" number="51">Mathematik</collection>
    <collection role="ddc" number="53">Physik</collection>
    <collection role="ddc" number="60">Technik</collection>
    <collection role="ddc" number="62">Ingenieurwissenschaften</collection>
    <collection role="ddc" number="000">Informatik, Informationswissenschaft, allgemeine Werke</collection>
    <collection role="institutes" number="">Fakultät Kommunikation und Umwelt</collection>
    <thesisPublisher>Hochschule Rhein-Waal</thesisPublisher>
    <thesisGrantor>Hochschule Rhein-Waal</thesisGrantor>
    <file>https://opus4.kobv.de/opus4-rhein-waal/files/215/B.Sc.Thesis_Dogotari.Marcel_Publish_WS2016.pdf</file>
  </doc>
  <doc>
    <id>216</id>
    <completedYear/>
    <publishedYear>2016</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber>102</pageNumber>
    <edition/>
    <issue/>
    <volume/>
    <type>bachelorthesis</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>2018-04-09</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>2016-07-18</thesisDateAccepted>
    <title language="eng">Radar Signal Distortion caused by Directional Vibration of a 24 GHz FMCW System</title>
    <abstract language="eng">This thesis is an initial attempt to investigate the influence of mechanical vibrations on the 24 GHz FMCW radar developed by IMST GmbH and develop a simple vibration compensation model for the human tracking algorithm.&#13;
&#13;
The project objectives are to determine the radar signal distortion caused by vibrations theoretically, conduct simulations to evaluate the effects of vibrations on the human tracking process, and develop a basic model to compensate the disturbing vibrations.&#13;
&#13;
The single radar pulse simulations conclude that when the radar is vibrating at a low frequency, the signal would not be distorted if the change of phase of the intermediate frequency is less than half a resolution cell. While the results from the multiple radar pulses simulations reveal that factors like the SNR value, vibrating amplitude and the target’s velocity would influence the human tracking process. The higher the SNR value, vibrating amplitude and target’s velocity, the more the detected ghost targets when there is only one target presence. A signal demodulation method is then proposed which indicate the possibility in reducing the disturbance caused by the vibrations.</abstract>
    <identifier type="urn">urn:nbn:de:hbz:1383-opus4-2164</identifier>
    <licence>CC BY-SA 4.0 International - Namensnennung-Weitergabe unter gleichen Bedingungen</licence>
    <author>Hoi Ying Lam</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>FMCW Radar</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Vibration</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Human Tracking</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Simulation</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Compensation</value>
    </subject>
    <collection role="ddc" number="51">Mathematik</collection>
    <collection role="ddc" number="53">Physik</collection>
    <collection role="ddc" number="60">Technik</collection>
    <collection role="ddc" number="62">Ingenieurwissenschaften</collection>
    <collection role="ddc" number="000">Informatik, Informationswissenschaft, allgemeine Werke</collection>
    <collection role="institutes" number="">Fakultät Kommunikation und Umwelt</collection>
    <thesisPublisher>Hochschule Rhein-Waal</thesisPublisher>
    <thesisGrantor>Hochschule Rhein-Waal</thesisGrantor>
    <file>https://opus4.kobv.de/opus4-rhein-waal/files/216/Lam_HoiYing.pdf</file>
  </doc>
  <doc>
    <id>224</id>
    <completedYear/>
    <publishedYear>2017</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber>57</pageNumber>
    <edition/>
    <issue/>
    <volume/>
    <type>bachelorthesis</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>2018-04-25</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>2017-09-26</thesisDateAccepted>
    <title language="eng">Automated Hyperspectral Field Scanner for Vegetation Monitoring</title>
    <abstract language="eng">Vegetation monitoring is an important tool in a variety of fields, e.g. precision agriculture and plants’ phenotyping. The system design of existing non-invasive ground based systems is usually not open-source. Therefore, these systems cannot be reliably modified and thus are not suitable to advanced applications, such as prototyping of new sensors. This thesis describes the development of a ground based hyperspectral monitoring system for use in plant science and sensor testing. A well-documented and automated working prototype has been developed and initial tests show promising results. Further work in system modularity and redundancy is needed.</abstract>
    <identifier type="urn">urn:nbn:de:hbz:1383-opus4-2247</identifier>
    <licence>CC BY-SA 4.0 International - Namensnennung-Weitergabe unter gleichen Bedingungen</licence>
    <author>Moritz Prüm</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Embedded systems</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Hyperspectral imaging</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Low-power design</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>System integration</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Vegetation monitoring</value>
    </subject>
    <collection role="ddc" number="50">Naturwissenschaften</collection>
    <collection role="ddc" number="60">Technik</collection>
    <collection role="ddc" number="62">Ingenieurwissenschaften</collection>
    <collection role="ddc" number="000">Informatik, Informationswissenschaft, allgemeine Werke</collection>
    <collection role="institutes" number="">Fakultät Kommunikation und Umwelt</collection>
    <thesisPublisher>Hochschule Rhein-Waal</thesisPublisher>
    <thesisGrantor>Hochschule Rhein-Waal</thesisGrantor>
    <file>https://opus4.kobv.de/opus4-rhein-waal/files/224/B.Sc.Thesis Moritz Pruem SS2017.pdf</file>
  </doc>
  <doc>
    <id>773</id>
    <completedYear/>
    <publishedYear>2021</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber>67</pageNumber>
    <edition/>
    <issue/>
    <volume/>
    <type>bachelorthesis</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>2021-04-28</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>2021-03-25</thesisDateAccepted>
    <title language="eng">Testing the Influence of Platinum Load on Performance of Fuel Cells Using Impedance Spectroscopy and Current Voltage Measurement</title>
    <abstract language="eng">Increasing Platinum catalyst loading in proton exchange membrane fuel cell is supposed to increase the performance and lifetime. However, Platinum is an extremely expensive material. Therefore, increasing loading could contribute to the price significantly. The aim of this work is to measure the proton exchange membrane fuel cell performance under three different catalyst loading on cathode and determine the optimum loading for performance in these three tested loading levels. The tested cathodic loadings are 0.3 mg/cm2, 0.6 mg/cm2 and 0.9 mg/cm2. By applying two methods: current-voltage measurement and electrochemical impedance spectroscopy, the open circuit voltages, polarization, power output and impedance were recorded.&#13;
From the experiment, it is found that the internal resistance decreased with increasing Platinum loadings on the cathode. The simulation results indicate this change is mostly contributed by decreasing cathodic resistance. With increasing cathodic Platinum loading, the cathodic resistance decreases. It is also found during experiments, the polarization, open circuit voltage and power performance first increased and then stayed at same level. These indicators showed best performance at 0.6 mg/cm2 cathodic loading level. Combined with simulation results, the large impedance value of constant phase element in equivalent model for 0.9 mg/cm2 loading is considered as the reason why the power performance stop improving.</abstract>
    <identifier type="urn">urn:nbn:de:hbz:1383-opus4-7730</identifier>
    <enrichment key="opus.source">publish</enrichment>
    <licence>CC BY 4.0 International - Namensnennung</licence>
    <author>Chenke Dai</author>
    <collection role="institutes" number="">Fakultät Kommunikation und Umwelt</collection>
    <thesisPublisher>Hochschule Rhein-Waal</thesisPublisher>
    <thesisGrantor>Hochschule Rhein-Waal</thesisGrantor>
    <file>https://opus4.kobv.de/opus4-rhein-waal/files/773/Testing_the_influence_of_platinum_load.pdf</file>
  </doc>
</export-example>
