1557063 research outputs found

    An equivalent beam approach for assessing tunnelling-induced distortions of frames with infills

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    This paper presents an approach to evaluate the response of low- and medium-rise frames with continuous foundations, either with or without infills, to tunnelling employing an equivalent beam with a behaviour dominated by shear deformations. Simplified soil-structure interaction models, consisting of a beam resting on an elastic continuum half-space, are compared against advanced three-dimensional analyses in which the tunnel, the soil, and the building are explicitly modelled. In the simplified approach, the frame is schematised as a Timoshenko beam and reliable procedures to estimate both bending and shear stiffness are discussed. In the refined modelling strategy, an advanced elastoplastic constitute law is employed, capable of reproducing fairly well the soil response to the excavation for increasing values of volume loss, while the full geometry of the structure is considered. First, the results of the proposed numerical approaches are compared in terms of tunnelling-induced foundation displacements, bay deformations and maximum tensile strains in the infills. Then, for the infill panels, the reliability of estimating the maximum tensile strain from the angular distortion of the frame bays is assessed. Finally, a meta-model is proposed to predict the maximum angular distortion based on greenfield settlements, eccentricity, and relative soil-structure stiffness

    New mechanistic insights into the role of water in the dehydration of ethanol into ethylene over ZSM-5 catalysts at low temperature

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    The low-temperature dehydration of bioethanol-to-ethylene is of great interest to reduce energy consumption and achieve high product purities in the biorefinery and olefin industry. Thermokinetic constraints, however, lead to low ethylene selectivity at low temperature. In this work, we integrate a new approach that combines a hierarchical acid H-form ZSM-5 (HZSM-5) with systematic catalytic testing to study how the physicochemical modification of the surface and intermediate catalytic species affect the ethanol-to-ethylene route at 225 °C. Four HZSM-5 zeolites were treated with OH species under basic conditions (OH−) or solely with H2O. Kinetic evidence coupled to 27Al-nuclear magnetic resonance, NH3-temperature-programmed desorption and N2 adsorption, as well as density-functional theory calculations, correlate ethylene selectivity with the appearance of new extra-framework Al(V) and Al(VI) species, acting as Lewis acid-sites. The adopted approach allows us to experimentally unveil the cooperative effect between Brønsted- and Lewis-acid sites that seem to play a key role in ethylene formation from ethanol at low-temperature via (i) a primary route via ethanol dimerization on neighboring Brønsted-acid sites to diethylether, which subsequently cracked on Lewis-acid sites to ethylene; (ii) a secondary route via the direct ethanol dehydration on Brønsted-acid sites. Theoretical calculations support the proposed catalytic cycle. These new insights shed light on the mechanism of ethanol-to-ethylene at low temperature, and on how the precise control over the strength of acid-sites and their population in HZSM-5 affects catalysis. This work progresses towards more active and stable catalysts, advancing into more mature low-temperature technologies for the dehydration of bioethanol into sustainable ethylene

    What Drives User Stickiness and Satisfaction in OTT Video Streaming Platforms? A Mixed-Method Exploration

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    This is an Accepted Manuscript of an article published by Taylor & Francis in International Journal of Human–Computer Interaction on 2023-01-02, available online: https://www.tandfonline.com/10.1080/10447318.2022.2160224. Deposited by shareyourpaper.org and openaccessbutton.org. We've taken reasonable steps to ensure this content doesn't violate copyright. However, if you think it does you can request a takedown by emailing [email protected]

    Three new shrews (Soricidae: Crocidura) from West Sumatra, Indonesia: elevational and morphological divergence in syntopic, sister taxa

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    This repository is for the manuscript "Three new species of shrew (Soricidae: Crocidura) from West Sumatra, Indonesia: elevational and morphological divergence in syntopic, sister taxa." It contains morphological data, data analysis scripts, and plotting functions needed to run the Bayesian regression models used to generate the size-corrected cranial measurements and Figure 3. The repository is split into 3 directories: `Data`, `Code`, and `Plots`. The details can be found in the READM

    The model for new data mapping to human endoderm-derived organoids cell atlas (HEOCA)

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    The model for new data mapping to human endoderm-derived organoids cell atlas (HEOCA)

    ddRAD-seq generated genomic SNP dataset of Central and Southeast European Turkey oak (Quercus cerris L.) populations

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    Turkey oak (Quercus cerris L.) is one of the most ecologically and economically significant deciduous tree species in the Central and Southeast European regions. The species has long been known to exhibit high levels of genetic and phenotypic variation. Recent climate response predictions for Turkey oak suggest a significant distribution extension in Europe under climate change. Since Turkey oak has relative drought-tolerant behavior, it is regarded as a potential alternative for other forest tree species during forestry climate adaptation efforts, not only in its native regions but also in Western Europe. For this reason, the survey of existing genetic variability, genetic resources, and adaptability of this species has great significance. Next-generation sequencing approaches, such as ddRAD-seq (Double digest restriction-site associated DNA sequencing), allow the attainment of high-resolution genome-wide simple nucleotide polymorphisms (SNPs). This study provides the first highly variable genome-wide SNP data for Turkey oak generated by ddRAD-seq. The dataset comprises 17 607 de novo and 26 059 reference-mapped SNPs for 88 individuals from eight populations, two from Bulgaria, one from Kosovo, and five from Hungary. Reference mapping was carried out by using cork oak’s reference genome. The obtained high-resolution genome-wide markers are suitable for investigating selection and local adaptation and inferring genetic diversity, differentiation, and population structure. The dataset is accessible at: https://doi.org/10.5281/zenodo.756872

    Lost in Translation: Text and Context in Economic versus Legal Concepts of the Contract

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    We examine the epistemic disjunction between economic and legal scholarship with respect to the concept of the contract. While economics continues to tend to treat the “contract” as a single, unified concept, legal studies, increasingly, acknowledges wide institutional variation in contracts in different contexts. Based on extensive analysis of the empirical evidence on contracting practices, we take a radical step in the direction of challenging a unitary theory of contract. We propose that there exist patterns of contracting across three different sectors: the high, medium and low levels of sophistication of the market economy and tease out, so far unnoticed, similarities in the high and low ends of the spectrum, i.e., instances where uncertainty is particularly salient. We argue that economic theory would provide a more accurate analysis of contracting practices, and, indeed, contracts, if these different variations, and their implications, were foregrounded

    Supplementary material 1 for Thesis Chapter 2 - An obligate aerobe hybridises hydrogen fermentation and carbon storage to adapt to hypoxia

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    Supplementary material for paired comparative metabolomics and proteomics on Mycobacterium smegmatis mc2155 during hypoxia, as part of chapter 2 for the thesis "Biochemistry and physiology of mycobacterial adaptations to energy starvation". Description below is identical to that provided in 'Summary.docx'. Proteomics_analysis.xlsx Includes raw and annotated data for comparative proteomics experiments for chapter 2. The tab ‘Annotated comparisons’ contains fold change and p values for the comparisons for each protein from Mycobacterium smegmatis mc2155 derived from LFQ-Analyst. Functional annotations are derived from KEGG pathways and modules, which utilise the spreadsheets in ‘MSMEG gene annotation’ ‘Protein ids to KEGG pathway’ and ‘KEGG Pathway and Modules’ to link KEGG annotations to MSMEG_XXXX gene identifiers and MSMEG_XXXX to Uniprot ID. Output from LFQ-Analyst is provided in the ‘Full_dataset’, ‘Imputed_matrix’ and ‘Original_matrix’ tabs. Data provided by the Monash Proteomics and Metabolomics Facility for upload into LFQ-analyst are provided as the ‘combined_protein.tsv’ and ‘LFQ-Analyst_experimental_design.txt’. Metabolism_analysis.xlsx Includes annotated data for comparative metabolomics experiments for chapter 2. Within the spreadsheet, TR refers to transition, ST refers to stationary phase and EXP refers to exponential phase. The tabs ‘TRvsEXP’, ‘STvsTR’ and ‘STvsEXP’ contain fold change and p values for each metabolite detected for each comparison. The remaining tabs categorise the metabolites based on KEGG database and IDEOM annotations. For broader categories (‘Lipid metabolism’,’ Carbohydrate metabolism’, ‘Cofactor metabolism’, ‘Nucleotide metabolism’, ‘Amino acid metabolism’ and ‘Peptides’ tabs), annotations were derived directly from filtering the ‘Map’ column of ‘Comparisons’ tab of the IDEOM worksheet (IDEOM_analysis.xlsb). Screenshots are pasted into each tab to show the filtering settings. The remaining tabs comprise narrower categories which were manually annotated with reference to KEGG pathways and maps, and also include rows corresponding to the proteomics data for these categories, so the proteomics and metabolomics data can be interpreted together. The ‘Proteomics’ tab contains the proteomics data referenced by these tabs, which is a copy of the ‘Annotated comparisons’ tab from the ‘Proteomics_analysis.xlsx’ file. A value of ‘N’ indicates the metabolite or protein (at least according to the name in the same row) was not found in these datasets. The IDEOM worksheet (IDEOM_analysis.xlsb) was provided by the Monash Proteomics and Metabolomics Facility and was used for further analysis and for annotations. ‘Data_for_MA_no_normalization.csv’ was also provided by the Monash Proteomics and Metabolomics Facility for upload into Metaboanalyst (https://www.metaboanalyst.ca/)

    FIRST GENERATION AFGHAN AMERICAN REFUGEE EXPERIENCES AND RESILIENCE

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    The purpose of this study is to understand the essence of first-generation Afghan American refugees by exploring their experiences within a social-ecological framework. Gaining a better understanding of Afghan refugee experiences could improve immigration policy and mental health treatment, encourage more research, and raise awareness of Afghan experiences. Study participants were 12 individuals (6 men and 6 women) with a mean age of 62 years who migrated from Afghanistan to the United States due to the Soviet invasion of Afghanistan in 1979. Qualitative analysis using the interpretative phenomenological analysis framework yielded four broad themes: refugee experiences, mental health, resilience, and reflections. All 12 participants reported experiences of trauma that resulted in symptoms of mental health disorders (i.e., PTSD, anxiety, depression), with only one participant obtaining professional mental health treatment. Resilience factors such as community, family and friend support, motivation, faith, and self-sufficiency provided a source of strength that aided in the successful integration of this population in the United States. Results of this study illustrate an association between social-ecological systems and refugee experiences

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