This study sheds light on a holistic understanding of muqarnas with its historical, philosophical and conceptual backgrounds on one hand and formal, structural and algorithmic principles on the other hand. The vault-like Islamic architectural element, muqarnas, is generally considered to be a non-structural decorative element. Various compositional approaches have been proposed to reveal the inner logic of these complex geometric elements. Each of these approaches uses different techniques such as measuring, unit-based decoding or three-dimensional interpretation of two-dimensional patterns. However, the reflections of the inner logic onto different contexts, such as the usage of different initial geometries, materials or performative concerns, were neglected. In this study, we offer a new schema to approach the performative aspects of muqarnas tectonics. This schema contains new sets of elements, properties and relations deriving partly from previous approaches and partly from the technique of folding. Thus, this study first reviews the previous approaches to analyse the geometric and constructional principles of muqarnas. Second, it explains the proposed scheme through a series of algorithmic form-finding experiments. In these experiments, we question whether 'fold', as one of the performative techniques of making three-dimensional forms, contributes to the analysis of muqarnas in both a conceptual and computational sense. We argue that encoding vault-like systems via geometric and algorithmic relations based on the logic of the 'fold' provides informative and intuitive feedback for form-finding, specifically in the earlier phases of design. While focusing on the performative potential of a specific fold operation, we introduced the concept of bifurcation to describe the generative characteristics of folding technique and the way of subdividing the form with respect to redistribution of the forces. Thus, in this decoding process, the bifurcated fold explains not only to demystify the formal logic of muqarnas but also to generate new forms without losing contextual conditions.
PurposeThe aim of this study is to present design tactics (DTs) for supporting the adaptability of existing primary and middle school buildings into the emerging needs of coronavirus disease 2019 (COVID-19). The study introduces a novel algorithmic model for postoccupancy evaluation of the existing school buildings and provides solutions to enhance the adaptability of these buildings.Design/methodology/approachThis study employs the DTs defined by the authors, integration of DTs to the algorithmic model and tests the usability of the proposed model in the selected sample set. The sample set consists of four primary and middle school buildings with different architectural qualities. The degrees of flexibility of the existing sample set are evaluated depending on the outcomes of the implementation.FindingsThe degrees of flexibility are achieved as a result of execution of the algorithmic model for each selected school building. Initial results of the case studies show that the flexibility of a school building is highly related to affordances and design decisions of the plan layout which were considered in the initial phases of the design process. Architectural qualities such as open plan and having sufficient voids in the interior and exterior space become prominent factors for ensuring flexibility.Originality/valueDeveloping a systematic approach to the adaptation problem of primary and middle school buildings to postpandemic reuse is a novel research topic. Apart from this contextual originality, the proposed taxonomy for postpandemic reuse in terms of three levels of adaptation is a new conceptual framework. Moreover, the proposed algorithmic model itself can be considered as an original contribution, as well as a merge of qualitative values such as adaptation and flexibility with an algorithmic model.
RESUMO: Este estudo apresenta resultados e descobertas de uma experimentação de três passos para integrar técnicas de modelagem e design analógico e digital, com especial atenção para o aumento do rendimento do comportamento de curvatura e curvilinearidade dos materiais de superfície planar rígidos. No âmbito do processo de experimentação, o papelão foi utilizado como material, as ações de corte e flexão foram utilizadas como técnicas e o corte a laser e o ambiente de script visual foram envolvidos como ferramentas. São examinados os potenciais de técnicas de materiais subtraíveis, tais como operações de corte, curvatura, incisão. A experimentação abrange a geração de padrão, incorporação de padrões de corte ao material plano 2D e remapeamento de padrões 2D em superfícies 3D, com base nos conhecimentos adquiridos na fase anterior e na exploração de novas superfícies de forma livre em 3D tanto em ambientes físicos como digitais. O modelo de experimentação de três passos apresentado tem potenciais para contribuir com os estudos pedagógicos focados nas abordagens exploratórias e criativas para a formação e fabricação de projetos integrativos. PALAVRAS-CHAVE:Flexão; Criação; Corte a Laser; Fabricação Digital; Técnicas Materiais; Curvatura Dupla.ABSTRACT: This study presents the outcomes and findings of a three-step experimentation to integrate analog and digital design and modeling techniques, with a particular focus on augmenting the affordance of bending behavior and curvilinearity of rigid planar surface materials. In the scope of the experimentation process, cardboard was used as a material, cutting and bending actions were utilized as techniques and laser cut and visual scripting environment were involved as tools. The potentials of subtractive material techniques such as cut, bend, kerf operations are examined. The experimentation covers hands-on pattern generation, embedment of cut patterns to 2D planar material, re-mapping 2D patterns onto 3D surfaces based on the insights gained in the previous phase and exploration of new 3D freeform surfaces both in physical and digital environments. The three-step experimentation model presented has potentials to contribute to the pedagogical studies focusing on explorative and creative approaches for integrative design formation and fabrication processes.
Introduction: The World Health Organization estimates that 71 million people with chronic HCV infection lived worldwide in 2015. HCV is a globally prevalent pathogen, that genotype1 is the most common. In this study, the prevalence of anti-HCV, distributions of HCV genotype, and viremia rates in patients with chronic hepatitis C were evaluated. Methodology: In this retrospective single-center study, anti-HCV results of 197,081 patients were evaluated between 2017 and 2020. Quantitative HCV-RNA PCR tests were performed on the Rotor-Gene Q real-time PCR instrument. HCV genotypes determination of 546 samples was carried out with the Gen-C 2.0 Reverse Hybridization strip and HCV Genotype Plus Real-TM kit. Results: The prevalence of anti-HCV was 0.95% and viremic HCV infection was 0.3% (610/197,081). HCV viremia rate was 33.17%. HCV viremia rate was highest in 2017 (52.36%) and the lowest in 2020 (18.3%) (p < 0.001). Genotype1 (72%) was the most common genotype, followed by genotype3 (14.1%), and genotype4 (8.8%). The most common subtypes were determined as genotype1b (56.2%) and genotype1a (13.2%). The viral load was higher in patients infected with genotype5. Conclusions: In this study, the rate of viremic HCV infection was found to be 0.3%. This rate was lower than the worldwide rate of HCV viremia. The distribution of HCV genotypes was like the global data. The identification of circulating genotypes and subtypes is essential for epidemiological purposes and remains important in the choice of treatment in patients with chronic HCV.
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