Browsing by Subject "Reuse"
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Item Open Access Analysis of brick wall debris for reusing(Gazi Universitesi * Muhendislik Mimarlik Fakultesi,Gazi University * Faculty of Engineering & Architecture, 2021-03-21) Üçer Erduran, Deniz; Demirel, İsmail Ozan; Elias-Ozkan, S. T.Tuğla duvarlar sağlam ve uzun ömürlü olmalarına rağmen farklı sebeplerle yıkıma maruz kalırlar. Bu çalışma Ankara Çiğdem Mahallesinde 1990’larda inşa edilmiş tuğla duvar dolgulu betonarme bir kooperatif binasının yıkım sürecini sunmaktadır. Yıkım sonrası atık olarak sahada biriken yatay delikli tuğla duvar parçaları incelenmiş ve yeniden kullanıma uygun olabilecekleri gözlenmiştir. Tuğlalar, sıva ve harç numuneleri laboratuvarda basınç testine, duvar parçaları da başlangıç kayma dayanımı testine tabi tutulmuştur. Elde edilen mukavemet değerleri ve ölçülen diğer fiziksel özellikler ilgili standartlardaki değerlerden yüksek olduğu için kullanılmalarının uygun olduğu sonucuna varılmış ve uygun bir yeniden kullanım metodu sunulmuştur. Son olarak, bu metot temel alınarak yıkımda oluşan genel duvar atıklarının kurtarılması için nasıl düzenlemeler yapılabileceği tartışılmıştır.Item Open Access Between pragmatism and ideology: spolia and spoliation practices in Byzantine and Seljuk Ankara(Bilkent University, 2023-12) Ünal, Selman OğuzcanThis thesis delves into the multifaceted phenomenon of spolia - the reuse of architectural elements from earlier structures into new premises - within the context of Ankara, Turkey. This work examines the possible practical and symbolic connotations embedded in the object and how people of the past perceived space, specifically between the ninth and thirteenth centuries. Through an interdisciplinary approach, drawing on art history, archaeology, digital tools and a comparative methodology, this piece examines spolia integrated into the walls and gates of the Ankara Castle and two thirteenth-century Rum Seljuk mosques of Ankara, namely Aslanhane and Alaeddin. The careful selection of these cases stems from a research gap in existing research regarding the centralized focus of spolia use in Western civilizations. Therefore, this work also adopts a diachronic perspective, trying to understand the use of spolia for the civilizations of the so-called East. Considering all these, this work argues that reuse practices were complex and harmonized with both practical and symbolic attributes. This statement is called under scrutiny by utilizing literary and material sources.Item Open Access Biobased sound absorptive panel system design and development using fruit seeds(Bilkent University, 2023-09) Tarman, DamlaIn order to reduce the carbon footprint due to currently applied sound absorptive materials in the building construction field, alternative sustainable systems are investigated in this research. By re-using the waste fruit seeds that are abundant in the Central Anatolia region of Turkey, a composite panel system is developed to be applied in buildings as a fine finish surface, like a wall or ceiling panel. The raw material is composed of various fruit seeds, including cherry, watermelon, olive, etc. The tree resin is combined with wood fire ash as a natural adhesive. The efficacy of the adhesive property is the subject of biological adhesive research. Wood glue is utilized as an alternative to other adhesive materials; it is considered more efficient in material production due to its practicality and accessibility. The varied combinations of seeds, tree resin, and wood glue have been tested through impedance tube measurements, and sound absorption coefficient data are acquired. To test the efficiency of produced samples, one with the maximum sound absorption performance is tested in the design studio at Bilkent University based on the data obtained, which is a current acoustic problem due to very high reverberance. An acoustical model is generated replicating the problematic studio, and the panel system is tested through ray-tracing simulations. On the generated studio model, the panel system is applied to specific surfaces, and reverberation times for the current and adjusted state of the studio is compared. The results indicate that the panels out of seeds combined with proper adhesives have a potential to be applied as a sound absorptive decorative system in various architectural spaces.Item Open Access Energy efficient boosting of GEMM accelerators for DNN via reuse(Association for Computing Machinery, Inc, 2022-06-06) Cicek, Nihat Mert; Shen, Xipeng; Özturk, ÖzcanReuse-centric convolutional neural networks (CNN) acceleration speeds up CNN inference by reusing computations for similar neuron vectors in CNN’s input layer or activation maps. This new paradigm of optimizations is, however, largely limited by the overheads in neuron vector similarity detection, an important step in reuse-centric CNN. This article presents an in-depth exploration of architectural support for reuse-centric CNN. It addresses some major limitations of the state-of-the-art design and proposes a novel hardware accelerator that improves neuron vector similarity detection and reduces the energy consumption of reuse-centric CNN inference. The accelerator is implemented to support a wide variety of neural network settings with a banked memory subsystem. Design exploration is performed through RTL simulation and synthesis on an FPGA platform. When integrated into Eyeriss, the accelerator can potentially provide improvements up to 7.75× in performance. Furthermore, it can reduce the energy used for similarity detection up to 95.46%, and it can accelerate the convolutional layer up to 3.63× compared to the software-based implementation running on the CPU.