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  <doc>
    <id>1565</id>
    <completedYear/>
    <publishedYear>2022</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>bachelorthesis</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>2022-08-12</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>2022-08-09</thesisDateAccepted>
    <title language="eng">Comparison of wheel and rubber track drives for tractors regarding masses, mass inertias, energy demands and tractor mechanics</title>
    <abstract language="eng">Soil compaction is a major concern in agriculture. As farming machinery develops to be larger and heavier, the risk of soil compaction increases. Tractors with rubber tracks have been developed to increase the contact area with soil in order to reduce the risk of soil compaction as well as to increase tractive performance. However, tractors with rubber tracks have increased mass due to the track components. Therefore, the combined effect of rubber tracks was investigated.&#13;
Comparison of tyres and rubber tracks for tractors on mass, mass inertia, tractor mechanics, energy demand, and soil compaction were investigated. Configurations of tractors consisting of combinations of tyres and interchangeable rubber tracks are evaluated in calculations and in simulation tool Terranimo. Simplified rubber track models were built in order to investigate effect of inertia from the rotational components on energy demand. A theoretical scenario was constructed to calculate the energy demand for the predefined workload. &#13;
Experimental data in past research showed that the superior tractive performance of rubber track is more apparent in looser soil. In the energy demand calculation part of the thesis the tracked configurations resulted in a higher energy demand. The tracked configurations also showed effect on reducing risk of soil compaction in the same defined scenario. However, the increased energy demand, hence higher fuel consumption and energy efficiency is a downside of the tracked configurations, and the selection between tyre and rubber track should depend on the situation.</abstract>
    <enrichment key="opus.source">publish</enrichment>
    <enrichment key="opus.doi.autoCreate">false</enrichment>
    <enrichment key="opus.urn.autoCreate">true</enrichment>
    <licence>CC0 1.0 Universell - Gemeinfreiheit (Public Domain)</licence>
    <author>Ho Yu Cheung</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Rubber tracks</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Soil compaction</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Tractor</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Energy demand</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Agriculture</value>
    </subject>
    <collection role="ddc" number="62">Ingenieurwissenschaften</collection>
    <collection role="institutes" number="">Fakultät Technologie und Bionik</collection>
    <thesisPublisher>Hochschule Rhein-Waal</thesisPublisher>
    <thesisGrantor>Hochschule Rhein-Waal</thesisGrantor>
  </doc>
  <doc>
    <id>1279</id>
    <completedYear/>
    <publishedYear>2022</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>bachelorthesis</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>2022-01-25</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>2021-12-02</thesisDateAccepted>
    <title language="eng">Urban Agriculture: an alternative to alleviate poverty and food insecurity in Panama</title>
    <abstract language="eng">There is an evident global rapid urbanization which has also impacted Panama. People immigrate from rural areas to the cities because they are seeking for better economic opportunities and stability. Agriculture in the countryside, is in Panama a sector with low productivity and incentives. However, with an increasing urban immigration, issues such as food insecurity, in already vulnerable cities emerge. The interest of the study is to analyze the current scenario of Urban Agriculture in Panama and to link the existing gap with studies from different countries in the region that were selected. To measure the impact of Urban &amp; Peri-Urban and Family agriculture, studies which used the ‘Food Insecurity experienced-based scales’ as an assessment indicator, were included. Four out of five studies showed a positive correlation between households who produced their own food, and their Food Security levels. It is concluded that Urban Agriculture &amp; Peri-Urban and Family agriculture may not be systems that can substitute the traditional system on supplying enough food to feed everyone but with support from the estate and enough public policies it has the capability of supplying a good portion that can help alleviate food security and poverty levels.</abstract>
    <enrichment key="opus.source">publish</enrichment>
    <licence>CC BY-NC 4.0 International - Namensnennung-Nicht kommerziell</licence>
    <author>Monica Camacho</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Food security</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Agriculture</value>
    </subject>
    <collection role="institutes" number="">Fakultät Life Sciences</collection>
    <thesisPublisher>Hochschule Rhein-Waal</thesisPublisher>
    <thesisGrantor>Hochschule Rhein-Waal</thesisGrantor>
  </doc>
</export-example>
