5,325 research outputs found
A mobile app and dashboard for early detection of infectious disease outbreaks: development study
No full text©Euijoon Ahn, Na Liu, Tej Parekh, Ronak Patel, Tanya Baldacchino, Tracy Mullavey, Amanda Robinson, Jinman Kim. Originally published in JMIR Public Health and Surveillance (http://publichealth.jmir.org), 09.03.2021. This is an open-access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work, first published in JMIR Public Health and Surveillance, is properly cited. The complete bibliographic information, a link to the original publication on http://publichealth.jmir.org, as well as this copyright and license information must be included
Liryczność brulionowa Zygmunta Krasińskiego w kontekście wiersza "Bóg mi odmówił tej anielskiej miary"
No full textZygmunt Krasiński’s Notebook Lyricism in the context of the poem entitled Bóg mi odmówił tej anielskiej miary The article is an interpretation of Krasiński’s poem with respect to ‘notebook romanticism’ category. The author analyses the poem in the light of Krasiński’s literary creation process, which is preserved in the Romantic art of editing
Historia mediów polskich w świetle wskaźników bibliometrycznych
No full text[History of Polish Media in Context of Bibliometric Indicators]. The article focuses on answering the question if media history is subject to bibliometric trends in ways similar to natural sciences, or does it have its own peculiar characteristics. The material for research consists of Historiographical Citation Index of Polish Media 1945-2010. Following issues were subject to study, among various aspects characteristic for history: language locality, publishing forms, differences in works' citations depending on its type (contributions, synthesis') and peculiarities of author distributions (Lorenz curve, Lotka law). A half-life indicator is also analyzed, and a HL14 indicator introduced, with related analysis. Comparison and correlation of selected parameters (citations, HL14, Hirsch index, publication number, volume, etc) was produced as well
Review on machining of additively manufactured nickel and titanium alloys
No full textThe machining of nickel and titanium-based superalloy components is very expensive and involves unusually high lead times compared with other engineering metals such as steels and aluminum. This has led to the development of most suitable additive manufacturing (AM) processes to fabricate these difficult-to-machine metals into near-net shape parts, thereby reducing the lead time and material waste, and significantly increasing productivity. Nonetheless, finish machining is still required on the AMed metal components to meet the dimensional and surface requirements of the application. Several research studies have investigated the machinability of AMed nickel and titanium alloy workpieces and have compared the results with the machining responses of wrought counterparts, which is detailed in this review. The categorization of the literature is based on the machining operations including turning, milling, drilling, and non-conventional machining, and the observations are discussed in accordance with various input parameters such as workpiece characteristics (hardness, microstructures) and anisotropy in mechanical properties due to build orientations during the AM process. Moreover, the influence of these parameters on cutting forces and temperatures, chip formation, and tool wear is analyzed and reported. From this review, it is found that the machinability of AMed nickel and titanium workpieces is quite different to the machining responses of their wrought counterparts. Further thorough experimentation is required to develop optimized machining parameters for AMed metal parts, while an exploration of different cutting tool geometries, coolant, and lubrication strategies for enhanced tool performance for machining AMed workpieces is essential. Finally, this study reviews the state of contemporary research, and offers suggestions for future research. (c) 2021 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
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Stability properties of self-propelled wakes
No full textThis thesis focuses on the stability characteristics of a momentum-less wake. Momentum-less wakes are wakes produced by self-propelled bodies and can be found in any numerous fluid flows, such as the flow behind a submarine, or fish. In this thesis we try to relate the momentum-less wake described to a wake behind a fish through specific choices in non-dimensional terms. We then look at both the temporal and spatial stability characteristics. While the temporal stability characteristics appeared to give results of interest, it appeared that the spatial stability characteristics were not as interesting. This thesis also goes into detail about two popular numerical methods of solving the Orr-Sommerfeld equation, and how to use these methods on the less common unbounded domain type flow
Learning to Reframe Problems Through Moral Sensitivity and Critical Thinking in Environmental Ethics for Engineers
No full textAs attention to the pervasiveness and severity of environmental challenges grows, technical universities are responding to the need to include environmental topics in engineering curricula and to equip engineering students, without training in ethics, to understand and respond to the complex social and normative demands of these issues. But as compared to other areas of engineering ethics education, environmental ethics has received very little attention. This article aims to address this lack and raises the question: How should we teach environmental ethics to engineering students? We argue that one key aspect such teaching should address is the tendency of engineers towards technical framing of (social) problems. Drawing then on engineering ethics pedagogy we propose that the competencies of moral sensitivity and critical thinking can be developed to help engineering students with problem (re)framing. We conclude with an example from our teaching that operationalizes these competencies.Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Ethics & Philosophy of Technolog
Body powered thermoelectric systems
No full textThesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2012.This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.Cataloged from student-submitted PDF version of thesis.Includes bibliographical references (p. 107-111).Great interest exists for and progress has be made in the effective utilization of the human body as a possible power supply in hopes of powering such applications as sensors and continuously monitoring medical devices [1]. This report furthers into the area of thermal energy harvesting, which focuses on using the temperature differential generated between the human body and the ambient environment to generate power. More specifically, a body-powered, thermoelectric-based power supply and system will be introduced and examined, with hopes that this technology will be utilized alongside low-power, medical monitoring applications in order to achieve self-sufficiency. This report also analyzes the performance of existing thermoelectric-based body-powered energy harvesting applications and compares that with the new design introduced in this work. The new designs were able to output upwards of 25[mu]W/cm2 or, equivalently, 280µW for the entire heat sink system. Additionally, this report details the physics associated with thermoelectric modules, addresses the issues with modern thermoelectric heat-sinks, introduces two new types of wearable, conformal heat sinks, quantifies the performance of the body-powered thermoelectric supply, tests a flexible EKG processing board, and analyzes future paths for this project.by Krishna Tej Settaluri.M.Eng
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