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</head>
<body>
<a class="skip-link" href="#main-content">Skip to main content</a>
<div class="page">
<aside class="sidebar">
<div class="sidebar-top">
<h1>Devis Saputra</h1>
<p class="tagline">Learning Designer | AIEd</p>
<nav class="toc" aria-label="Research page navigation">
<a href="index.html">← Main Portfolio</a>
<a href="#overview">Overview</a>
<a href="#degree-research">Degree Research</a>
<a href="#projects">Research Projects</a>
</nav>
</div>
<div class="sidebar-bottom" aria-label="Contact links">
<div class="contact-label">Links</div>
<a href="mailto:devis.saputra@gmail.com">
<i class="fa-solid fa-envelope" aria-hidden="true"></i><span>Email</span>
</a>
<a href="https://linkedin.com/in/devissaputra" target="_blank" rel="noopener noreferrer">
<i class="fa-brands fa-linkedin" aria-hidden="true"></i><span>LinkedIn</span>
</a>
<a href="https://www.xing.com/profile/Devis_Saputra" target="_blank" rel="noopener noreferrer">
<i class="fa-brands fa-xing" aria-hidden="true"></i><span>Xing</span>
</a>
<a href="https://github.com/devissaputra/" target="_blank" rel="noopener noreferrer">
<i class="fa-brands fa-github" aria-hidden="true"></i><span>GitHub</span>
</a>
<a href="https://orcid.org/0000-0002-7133-9410" target="_blank" rel="noopener noreferrer">
<i class="ai ai-orcid" aria-hidden="true"></i><span>ORCID</span>
</a>
<a class="scholar" href="https://scholar.google.com/citations?user=EB5_ZRMAAAAJ&hl=en&oi=ao" target="_blank" rel="noopener noreferrer">
<i class="ai ai-google-scholar" aria-hidden="true"></i><span>Google Scholar</span>
</a>
</div>
</aside>
<main class="content" id="main-content">
<a class="back-link" href="index.html"><i class="fa-solid fa-arrow-left" aria-hidden="true"></i> Back to main portfolio</a>
<div class="portfolio-nav" aria-label="Portfolio areas">
<a href="research.html" class="active" aria-current="page">Research</a>
<a href="learningdevelopment.html">Learning & Development</a>
<a href="aiengineering.html">AI Engineering</a>
<a href="aieducation.html">AI in Education</a>
<a href="systemsengineering.html">Systems Engineering</a>
</div>
<section class="hero" id="overview">
<h2>Research</h2>
<p class="lede">Degree research and applied projects in information systems, engineering and tourism.</p>
</section>
<div class="item-index repo-index grid-cols-3" aria-label="Research projects and experience">
<a href="#mba_flat_organizations">Flat Organizations</a>
<a href="#geotagged_image_retrieval">Image Retrieval</a>
<a href="#greedy_traffic_light_optimization">Traffic Light Optimization</a>
<a href="#andaliman_dryer">Andaliman Dryer</a>
<a href="#geothermal_exergy">Geothermal Exergy</a>
<a href="#sport_tourism">Sport Tourism</a>
</div>
<section id="degree-research">
<div class="eyebrow-rule"><h2>Degree Research</h2></div>
<p class="repo-section-intro">An MBA thesis on organizational leadership, an Informatics thesis on geotagged image retrieval, and a coauthored undergraduate paper on traffic signals.</p>
<div class="research-list">
<article class="research-card" id="mba_flat_organizations">
<div class="meta" aria-label="MBA Thesis; Würzburg University of Applied Sciences, now THWS; 2013 thesis; degree completed 2014">
<span class="type">MBA Thesis</span>
<span class="meta-separator" aria-hidden="true">·</span>
<span>Würzburg University of Applied Sciences, now THWS</span>
<span class="meta-separator" aria-hidden="true">·</span>
<span>2013 thesis; degree completed 2014</span>
</div>
<h3>Leadership on Flat Organizational Structure: Focusing on Organization Using Self-Managing Team and Open Allocation Strategy</h3>
<ul>
<li>Conducted a qualitative comparative case study of Valve Corporation and GitHub on leadership development in flat organizations.</li>
<li>Examined self-managing teams, open allocation, peer relationships, leader retention, and decentralized decision making using secondary sources and hermeneutic analysis.</li>
</ul>
</article>
<article class="research-card" id="geotagged_image_retrieval">
<div class="meta" aria-label="B.Eng. Thesis; Institut Teknologi Bandung (ITB); 2010">
<span class="type">B.Eng. Thesis</span>
<span class="meta-separator" aria-hidden="true">·</span>
<span>Institut Teknologi Bandung (ITB)</span>
<span class="meta-separator" aria-hidden="true">·</span>
<span>2010</span>
</div>
<h3>Image Retrieval System Using Geotagged Information</h3>
<ul>
<li>Developed and evaluated an image retrieval system combining textual information with geographic metadata stored in JPEG EXIF fields.</li>
<li>Used the vector space model and compared TF, IDF, and TF-IDF weighting schemes; evaluated retrieval using precision, recall, and Non-Interpolated Average Precision.</li>
<li>Demonstrated that geotagging could be integrated with text-based retrieval to support location-aware image search.</li>
</ul>
</article>
<article class="research-card" id="greedy_traffic_light_optimization">
<div class="meta">
<span class="type">Undergraduate Technical Paper</span>
<span class="meta-separator" aria-hidden="true">·</span>
<span>Institut Teknologi Bandung (ITB)</span>
<span class="meta-separator" aria-hidden="true">·</span>
<span>2005–2006 academic year</span>
</div>
<h3>Penerapan Algoritma Greedy pada Optimasi Pengaturan Lampu Lalu Lintas Sederhana</h3>
<p class="research-title-translation translation">[Application of a Greedy Algorithm to Optimize Simple Traffic Light Control]</p>
<ul>
<li>Coauthored with Rocky Hartono and Joel THP Hutasoit a proposed greedy-algorithm approach to choosing green-light durations for a simplified four-road traffic intersection.</li>
<li>Modeled incoming and outgoing vehicle counts, estimated queue densities and candidate signal timings to explore more balanced traffic flow.</li>
<li>The paper presents an analytical model and proposed algorithm, not a validated real-world traffic deployment; its conclusions acknowledge that greedy selection does not always provide a globally optimal solution.</li>
</ul>
<div class="output"><strong>Output:</strong> Hartono, R., Saputra, D. W., & Hutasoit, J. T. H. <em>Penerapan Algoritma Greedy pada Optimasi Pengaturan Lampu Lalu Lintas Sederhana.</em> Undergraduate technical paper, Department of Informatics Engineering, Institut Teknologi Bandung (2005–2006 course archive).<br>
<a class="doi-link" href="https://informatika.stei.itb.ac.id/~rinaldi.munir/Stmik/2005-2006/Makalah2006/MakalahStmik2006-48.pdf" target="_blank" rel="noopener noreferrer"><i class="fa-solid fa-file-pdf" aria-hidden="true"></i> Full paper (ITB PDF)</a>
</div>
</article>
</div>
</section>
<section id="projects">
<div class="eyebrow-rule"><h2>Research Projects</h2></div>
<div class="research-list">
<article class="research-card" id="andaliman_dryer">
<div class="meta">
<span class="type">Applied Research & Product Development</span>
<span>2019</span>
</div>
<h3>Design and Development of an Andaliman Dryer Using Quality Function Deployment</h3>
<ul>
<li>Coauthored and contributed to the design and development of a functional Andaliman dryer using Quality Function Deployment to translate user and product requirements into an engineering solution.</li>
<li>The team built the physical dryer and formally transferred the completed machine to a local farmer for practical use.</li>
</ul>
<div class="output"><strong>Output:</strong> Peer reviewed article in <em>Jurnal Sains dan Teknologi</em>, 19(2), 133 to 140; a functional Andaliman dryer delivered for field use; and an associated intellectual property output.<br>
<a class="doi-link" href="https://doi.org/10.36275/stsp.v19i2.210" target="_blank" rel="noopener noreferrer"><i class="fa-solid fa-arrow-up-right-from-square" aria-hidden="true"></i> DOI</a>
</div>
</article>
<article class="research-card" id="geothermal_exergy">
<div class="meta">
<span class="type">Nationally Competitive Research</span>
<span>2019</span>
</div>
<h3>Performance Investigation of Geothermal Power Plant Based on Exergy and Exergoeconomic Analyses</h3>
<ul>
<li>Served as a research team member and coauthor in a quantitative evaluation of geothermal power plant performance using exergy and exergoeconomic approaches.</li>
</ul>
<div class="output"><strong>Output:</strong> Peer reviewed paper in <em>IOP Conference Series: Materials Science and Engineering</em>, 546, 072006 (2019).<br>
<a class="doi-link" href="https://doi.org/10.1088/1757-899X/546/7/072006" target="_blank" rel="noopener noreferrer"><i class="fa-solid fa-arrow-up-right-from-square" aria-hidden="true"></i> DOI</a>
</div>
</article>
<article class="research-card" id="sport_tourism">
<div class="meta">
<span class="type">Conference Research</span>
<span>2nd Global Conference on Hospitality, Tourism and Sports Management (GCHTSM 2023)</span>
<span>2023</span>
</div>
<h3>Sport Tourism in Lake Toba Area: Moving Forward</h3>
<ul>
<li>Coauthored a qualitative study of sport tourism potential across eight regencies in the Lake Toba area: Toba, Samosir, North Tapanuli, Karo, Humbang Hasundutan, Dairi, Pakpak Bharat and Simalungun.</li>
<li>The study used primary interviews and secondary literature to examine regional sport tourism trends and highlighted the need to develop tourism stakeholder capabilities.</li>
</ul>
<div class="output"><strong>Output:</strong> Simamora, N., Simanjuntak, D., & Tampubolon, N. (2023). <em>Sport Tourism in Lake Toba Area: Moving Forward.</em> Conference abstract, 2nd Global Conference on Hospitality, Tourism and Sports Management (GCHTSM 2023), Bali, Indonesia. Asia Pacific Institute of Advanced Research. ISBN 978-0-6482404-7-1. No DOI verified for this record.<br>
<a class="doi-link" href="https://apiar.org.au/wp-content/uploads/2023/08/5_GCHTSM_Jan_2023_BRRABS_806_TOUR_p.5.pdf" target="_blank" rel="noopener noreferrer"><i class="fa-solid fa-arrow-up-right-from-square" aria-hidden="true"></i> Conference abstract (PDF)</a>
</div>
</article>
</div>
</section>
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