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Purpose Coronavirus disease (COVID-19) has profoundly impacted residency training and education. To date, there has not been any broad assessment of urological surgery residency changes and concerns during the COVID-19 pandemic. Materials and methods The Society of Academic Urologists distributed a questionnaire to urology residency program directors on March 30, 2020 exploring residency programs changes related to the COVID-19 pandemic. Descriptive statistics are presented. A qualitative analysis of free response questions was underta

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Rapidly growing 3D printing of hydrogels requires network materials which combine enhanced mechanical properties and printability. One of the most promising approaches to strengthen the hydrogels consists of the incorporation of inorganic fillers. In this paper, the rheological properties important for 3D printability were studied for nanocomposite hydrogels based on a rigid network of percolating halloysite nanotubes embedded in a soft alginate network cross-linked by calcium ions. Particular attention was paid to the effect of polymer