175 research outputs found
Graphene Oxide - Towards A Comprehensive Characterization Scheme
No full textUniversity of Minnesota Ph.D. dissertation. September 2015. Major: Chemical Engineering. Advisor: Christopher Macosko. 1 computer file (PDF); xiv, 193 pages.Graphene oxide (GO) is a near-2D material derived via oxidation of graphite and exploited in nanocomposites and optoelectronics. Following a literature review, the modified Tour-Dimiev (MTD) method was singled out for making GO, with the introduction of modifications tailored towards producing large sheets by starting with a large graphite size, tuning the oxidation conditions, employing temperature control and a modified wash routine. The product was characterized using wide-angle x-ray diffraction, x-ray photoelectron and Raman spectroscopy, revealing near completeness of graphite conversion, high oxygen content of GO and a comparable degree of defects to literature reports on the same. We imaged MTD-GO via fluorescence quenching microscopy (FQM) and atomic force microscopy (AFM). We compared the analytical capabilities of the image analysis software ImageJ with MATLAB, introducing several MATLAB subroutines to mitigate image analysis issues. We image-analyzed MTD-GO, concluding that GO size and thickness are statistically uncorrelated and described by lognormal and normal distributions respectively. We demonstrated that AFM captures small particles better than FQM, and that these two techniques can be combined to obtain a complete picture of polydisperse sample size distributions. Next, we modeled polydisperse dilute dispersions of oblate spheroids and discs in shear, uniaxial and biaxial extension using microhydrodynamic models found in the literature. We used the shear model to fit experimental shear data on a number of serially diluted sheet dispersions to obtain the dimensions and distributions thereof. The systems analyzed were MTD-GO, commercial GO before and after sonication, and a literature dataset on aqueous layered double hydroxides. Finally, we conducted novel Langmuir trough experiments with MTD-GO to understand the mechanisms surrounding the air-water interfacial assembly of GO. We were able to successfully transfer our films from the air-water interface onto a simple and versatile substrate such as surface-treated glass. We correlated film morphology in situ using Brewster Angle Microscopy and ex situ through FQM imaging of Langmuir-Blodgett-coated glass slides, to the pressure-area isotherm. We established that film packing occurs at low surface pressures. Finally, we showed that GO shows weak, pH-dependent intrinsic surface activity.Ismail, Issam. (2015). Graphene Oxide - Towards A Comprehensive Characterization Scheme. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/183367
MDOCS Poster-2018-02-06, Issam Nassar
No full textFebruary 6, 6pm
Location: Payne Room
Free and open to the public.
In conjunction with the exhibition This Place
Part of the Palestinian Voices series, organized and co-sponsored by the John B. Moore Documentary Studies Collaborative (MDOCS), the Environmental Studies and Sciences Program, International Affairs, Media and Film Studies, Art History, History, Hayat, and the Skidmore College Dean’s Office
Join us for a lecture by Issam Nassar on the history of Palestinian photography. Nassar is a historian of the Modern Middle East and of Photography at Illinois State University. His work focuses on the modern Middle East and the history of photography. He is the co-editor of Jerusalem Quarterly and the author and editor of a number of books, including the editor of I Would Have Smiled: Photographing the Palestinian Refugee Experience (Institute for Palestinian Studies, 2009) with Rashā Salṭī, and The Story of Jerusalem (Olive Branch Press, 2013).
Murat Yildiz, Assistant Professor of History at Skidmore College, will introduce Nassar and moderate a discussion following the talk.
This talk is part of exhibition This Place, on view February 3 through April 22, 2018, as well the Palestinian Voices series. The Palestinian Voices series is organized and co-sponsored by the John B. Moore Documentary Studies Collaborative (MDOCS), the Environmental Studies and Sciences Program, International Affairs, Media and Film Studies, Art History, History, Hayat, and the Skidmore College Dean’s Office.
This event is free and open to the public
Steel Slag Aggregate Characteristics Evaluation as Railway Ballast
No full textThe use of recycled materials is a new tendency in the field of railway engineering. Steel slag aggregates (SSA) are one of the recycled materials derived from the steel industry. The application of SSA in ballasted railway tracks requires mechanical examination. In the present paper, the shear behavior of the ballast layer constructed by SSA and basalt aggregates was considered to assess the use of SSA as a substitution for basalt. In this regard, a series of large-direct shear tests were performed on basalt and SSA under various normal stresses. Based on the results, basalt aggregates have higher shear resistance than SSA for all normal stress. However, steel slag has sufficient shear strength as well as particle abrasion resistance. Overall, it was proven that the SSA has suitable stability against shear forces that could be applied on railway ballast.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.Railway Engineerin
Problem Solving Through Emerging Technologies
No full textAbstract: This article offers a discussion of the overall role of problem management process among emerging technologies when companies attempt to solve problems that affect their revenue and profit streams. The findings of this study have shown that different technologies that have emerged over the past decade have helped companies solve problems that might be significantly harder to solve if the firm simply depended upon humans. Technologies such as Artificial Intelligence (AI) and Predictive Analytics (PA) have been especially helpful. AI can support companies become proactive to solve problems before they have become financially or technically problematic. The employment of PA can support companies predict patterns for potential technical issues and/or even predict customers’ future performance in terms of what they will buy, based on what they have already bought. The advantage of such analytics is not just for problem-solving but also to delight customers and provide better services. For the future, companies shall improve in the competency of matching up the current problem with the technology best designed to solve such a problem.
Keywords: Problem Solving Process, Information Technology Service Management, Internet of Things (IoT), Predictive Analytics, Artificial Intelligence, 4th Industrial Revolution, Public Onchain Database, Metadata, Augmented Reality.
Title: Problem Solving Through Emerging Technologies
Author: Ahmad Issam Alzahed
International Journal of Computer Science and Information Technology Research
ISSN 2348-1196 (print), ISSN 2348-120X (online)
Vol. 10, Issue 3, July 2022 - September 2022
Page No: 45-49
Research Publish Journals
Website: www.researchpublish.com
Published Date: 05-September-2022
DOI: https://doi.org/10.5281/zenodo.7050274
Paper Download Link (Source)
https://www.researchpublish.com/papers/problem-solving-through-emerging-technologiesInternational Journal of Computer Science and Information Technology Research, ISSN 2348-1196 (print), ISSN 2348-120X (online), Research Publish Journals, Website: www.researchpublish.co
Pourquoi l’élite marocaine préfère les chaussures d’origine étrangère ? Exploration des valeurs personnelles par les chainages cognitifs
No full textInternational audienc
Managing Cloud Computing Environment: Gaining Customer Trust with Security and Ethical Management
No full textAbstractThis paper aims to find out the management best practices of new hype of technology like Cloud computing. The management of such environment is highly dependent on the trust relationship between the cloud service providers and their customers (and/or other businesses). This trust is not only dependent on the latest technological tools, but rather also dependent on the management strategy in such highly critical environment. To achieve this objective, a survey was conducted related to the acceptability of the cloud services which has resulted in three main sections. These were: security, data protection and ethics in cloud computing environment. The sample size was 441 where it was resulted in highly significant relationship between ethics and security as well as ethics and data protection which are the main two motivations for any business to join the cloud. Based on this study, a guideline of managing cloud computing to maintain these three issues was described. Ten steps were proposed to protect cloud services from possible unethical behaviors as well as to protect systems from possible security breach
Recommendations on the diagnosis, treatment and monitoring of testosterone deficiency in men
No full textThe relative proportional increase of the elderly population within many countries will become one of the most significant social transformations of the twenty-first century and, for the first time in history, persons aged 65 or above outnumbered children under five years of age globally. One in four persons living in Europe and Northern America will be aged 65 or over. One of the goals of ISSAM is to raise awareness of the special health needs of older men. Since a significant number of aging men will eventually become testosterone deficient, the Hypogonadism panel of ISSAM updates its guidelines. © 2021 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group
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