Ostwestfalen-Lippe University of Applied Sciences and Arts
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Deep learning-based localisation of combine harvester components in thermal images
No full textIt is crucial to identify defective machine components in production to ensure quality. Some components generate heat when defective, so automating the inspection process with a thermal imaging camera can provide qualitative measurements. This work aims to use computer vision methods to locate these components in thermal images. Since there is currently no comparison of object detection and semantic segmentation algorithms for this use case, this study compares different architectures with the goal of localising these components for further defect inspection. Moreover, as there are currently no datasets for this use case, this study contributes a novel annotated dataset of thermal images of combine harvester components. The different algorithms are evaluated based on the quality of their predictions and their suitability for further defect inspection. As semantic segmentation and object detection cannot be directly compared with each other, custom weighted metrics are used. The architectures evaluated include RetinaNet, YOLOV8 Detector, DeepLabV3+, and SegFormer. Based on the experimental results, semantic segmentation outperforms object detection regarding the use case, and the SegFormer architecture achieves the best results with a weighted MeanIOU of 0.853
Task-fidelity Assessment for Programming Tasks Using Semantic Code Analysis
No full textIn computer science and related technical fields, researchers, educators, and practitioners are continuously automating recurring tasks for high efficiency in a wide variety of fields. In higher education, such tasks that educators face are the recurring review and assessment process of students' programming coursework. Thus, various attempts exist to automate the assessment and feedback generation for course homework and practicals in higher education. Those approaches for automated programming task assessment often comprise running automated tests to check for limited functional correctness and potentially style checking for various violations (LINTing). Educators familiar with large-scale automated task assessment are likely used to seeing hard-coded solutions specifically or accidentally designed to just pass the required tests, ignoring or misinterpreting the actual task requirements. Detecting such issues in arbitrary code is non-trivial and an ongoing research topic in software engineering. Software engineering research has yielded various semantic analysis frameworks, such as GitHub's CodeQL, which can be adapted for programming task assessment. We present a work-in-progress programming task analysis framework which employs CodeQL's analysis technology to identify the actual use of task-description-mandated syntactic and semantic elements such as loop structures or the use of mandated data blocks in branching conditions. This allows extending existing course work analysis frameworks to include a semantic check of an uploaded program which exceeds the relatively simple set of input-output test cases provided by unit tests. We use a running example of entry level programming tasks and several solution attempts to introduce and explain our proposed control flow and data flow -based analysis method. We discuss the benefits of including semantic analysis as an additional method in the automated programming task assessment toolbox. Our main contribution is the adaptation of an semantic analysis code framework to analyse syntactic and semantic components in students' programming coursework
Grüne Infrastruktur und Landschaft
No full textGrüne Infrastruktur ist ein neuartiger Ansatz für die Landschaftsplanung. Seine Innovationspotenziale bestehen in der umfassenden Sicht auf Natur und Landschaft, die ökologische, sozio-kulturelle, ästhetische und ökonomische Aspekte beinhaltet und vielfältige gesellschaftspolitische Ziele wie den Klimawandel oder sozialen Zusammenhalt aufgreift. Das breit aufgestellte und in Teilen vage Konzept bietet gerade aufgrund der Interpretationsmöglichkeiten Chancen, um die Entwicklung von Landschaften aus unterschiedlichen Perspektiven zu diskutieren und zu integrieren. Die Planung und Umsetzung von grüner Infrastruktur erfordert daher partizipative Ansätze, die sowohl verschiedene Disziplinen und Interessensgruppen einbeziehen, als auch zivilgesellschaftliches Engagement berücksichtigen und fördern
Entwicklung einer Corporate Identity für ein fiktives Kleingewerbe im Bereich Stricken & Häkeln
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Disciples, Devotees, Scholars, and Friends
No full textIt is a long-standing and well-appreciated tradition of Docomomo International to emphasize its diversity expressed in buildings, sites, and neighborhoods due to different geography, language, education, and personalities. The term multiple modernisms has been coined to express regional, stylistic, and constructive differences in the formal and philosophical expression of Modern Movement across the globe, within the continents, and even within countries. Docomomo conferences and Docomomo Journals have used and interpreted the term over the last 30 years to express and acknowledge the diversity in the growing community of national working parties. We only need to refer to the recent Docomomo Journal no. 67 (2022) on Multiple Modernities in Ukraine1, or no. 36 (2007) on Other Modernisms2, published in parallel with the 2006 Docomomo International Conference in Istanbul and Ankara (Turkey) with the same title. Other issues highlighted local and regional particularities together and, at the same time, referenced common roots and personal links, such as the preservation technology dossier no. 13 on Perceived Technologies in the Modern Movement 1918-1975 published by the International Specialist Committee on Technology (ISC/T) in 2014. In that publication, the specific and long-term collaborations of architects with engineers and artists were explored often leading to exceptional solutions in structure, design, and function
Rheologische Modelle – ein Beitrag für die systematische Entwicklung von Fleischersatzprodukten?
No full textCompression properties of glued laminated timber and tensile properties of gluelam lamellas from oil palm wood
No full textWhen oil palm lumber is considered for load-bearing products such as glued laminated timber (GLT), defined strength and stiffness values are required. In this investigation, combined GLT from oil palm wood is tested in compression parallel and perpendicular and glulam lamellas in tension parallel to the vascular bundles. Strength and Young´s modulus in compression and tension parallel increase with the density by power law relationship. In contrast to dicotyledons, the strength in construction size exceeds that of small, defect-free test specimens (compression strength perpendicular), are in the same range (tensile and bending strength parallel) or only a little below (compression strength parallel). The specimen size does not influence the strength. The ratio of fc,0 : fm : ft,0 is 1.2 : 0.8 … 1.7 … 2.6 : 1 and fc,0 : fc,90 = 2.7 … 13.0 … 32.6 : 1 for ρ = 200 … 400 … 600 kg/m³; the ratio of Ec,0 : Em : Et,0 is 1.2 : 1.3 : 1 for ρ = 400 kg/m³. Ashby´s performance indices for minimum weight design rise with the density; the strength-density performance indices are comparable or only slightly lower than that for structural size softwood, whereas the modulus-density performance indices are much lower. The challenge in use of oil palm wood for load-bearing construction products is the low stiffness
Branchenleitfaden des Deutschen Nachhaltigkeitskodex – Eine Analyse der sektorspezifischen Handreichung für die Fahrradindustrie
No full textDie Nachhaltigkeitsberichterstattung wird anhand zahlreicher Rahmenwerke, Standards und Leitfäden unter anwendungsorientierten Gesichtspunkten konkretisiert. Der Deutsche Nachhaltigkeitskodex (DNK) stellt einen Leitfaden dar, der Unternehmen die Berichterstattung über nachhaltigkeitsrelevante Aspekte des betrieblichen Handelns anhand von 20 Kriterien ermöglicht. Im Sommer 2023 wurde eine branchenspezifische Konkretisierung des DNK-Leitfadens für die Fahrradindustrie veröffentlicht. Der Fahrradbranche, die einen Beitrag zur Förderung der umweltfreundlichen Mobilität und infolgedessen Verkehrswende hervorzurufen vermag, wird damit ein Leitfaden für die Nachhaltigkeitsberichterstattung zur Verfügung gestellt