175 research outputs found
Effects of pendent phenol functional groups on secondary coordination spheres of heme like Fe-salen complexes
No full textSince the beginning of industrial revolution, burning of fossil fuels has mainly led to increase in atmospheric concentration of CO2 , a Green House Gas (GHG), from 250 ppm to 400 ppm between 1800 and 2012. One way to reduce the burning of fossil fuels and CO2 emission rate is to explore alternative carbon free fuels to meet the energy demand.This project aims at the synthesis and study of metal complexes inspired by biological models that will help better design catalysts to perform water oxidation more effectively.This poster won the Dean, Faculty of Science award (2020). Advisor: Dr. Linus Chiang, Departmen of Chemistry
21st-century scholarship and Wikipedia
No full textWikipedia, the world’s fifth most-used Web site, is a good illustration of the growing credibility of online resources. In his article in Ariadne earlier this year, “Wikipedia: Reflections on Use and Academic Acceptance”, Brian Whalley described the debates around accuracy and review, in the context of geology. He concluded that ‘If Wikipedia is the first port of call, as it already seems to be, for information requirement traffic, then there is a commitment to build on Open Educational Resources (OERs) of various kinds and improve their quality.’ In a similar approach to the Geological Society event that Whalley describes, Sarah Fahmy of JISC worked with Wikimedia and the British Library on a World War One (WWI) Editathon. There is a rich discourse about the way that academics relate to Wikipedia
Research and Scientific Edition in the Social Web: The Shared Science
No full textIn this paper, the social web as a work context for scientific research and the methodological features accrued to researchers by those work contexts are analyzed. Associated concepts to e-Science, Science 2.0 and Shared Science and their characteristics are proposed. Virtual Research Environments (VREs) are defined and analyzed taking into account their historical development since the first primitive environments based on messaging service and gopher, up to the current ones that use social web tools and services, focusing on the features accrued to VREs by the social web as regards the shared nature of science and research. Special emphasis on support to digital scientific edition is made -mainly on peer review- and a proposal for revision through social networks are made. On this point, some of the most frequent objections -mainly on experimental areas- are mentioned. The coincidence of methods and objectives between these environments and those of the revisions in Social Sciences in which Formative Research has more relevance are also analyzed. Furthermore, in this sense, meaning, importance and possibility of having live information from a research beyond what is published and that is on the cloud stand out. Finally, the paper concludes with the need for support from agencies and research institutions to open edition as well as to VREs infrastructure and digital edition in environments, with standards for communication in the social network as regards funding and projects
ROMR: A ROS-based Open-source Mobile Robot
No full textROMR is an open-source modular mobile platform for research, navigation and logistics applications. Its design leveraged off-the-shelf (OTS) components, additive manufacturing technologies, aluminium profiles, and consumer hoverboard high-torque brushless direct current (BLDC) motors. It is compatible with the robot operating system (ROS) , has a maximum payload of 90kg, and costs less than $1500. It features several lidar sensor technologies for potential application for perception, simultaneous localisation and mapping, deep learning tasks, and many more. Visit the project website for updates: https://linusnep.github.io/ROS-Mobile-Robot
How Many Answers Are Enough? Optimal Number of Answers for Q&A Sites
No full textWith the proliferation of the social web, questions about information quality and optimization attract the attention of IS scholars. Question-answering (QA) sites, such as Yahoo!Answers, have the potential to produce good answers, but at the same time not all answers are good and not all QA sites are alike. When organizations design and plan for the integration of question answering services on their sites, identification of good answers and process optimization become critical. Arguing that ‘given enough answers all questions are answered successfully,’ this paper identifies the optimal number of posts that generate high quality answers. Based on content analysis of Yahoo! Answers’ informational questions (n=174) and their answers (n=1,023), the study found that seven answers per question are ‘enough’ to provide a good answer
ROMR: A ROS-based Open-source Mobile Robot
No full textROMR is an open-source modular mobile platform for research, navigation and logistics applications. Its design leveraged off-the-shelf (OTS) components, additive manufacturing technologies, aluminium profiles, and consumer hoverboard high-torque brushless direct current (BLDC) motors. It is compatible with the robot operating system (ROS) , has a maximum payload of 90kg, and costs less than $1500. It features several lidar sensor technologies for potential application for perception, simultaneous localisation and mapping, deep learning tasks, and many more
ROMR: A ROS-based Open-source Mobile Robot
No full textCurrently, commercially available intelligent transport robots that are
capable of carrying up to 90kg of load can cost \ROMRROMRROMRROMRROMR$ can be
found at https://osf.io/ku8ag
ROMR: A ROS-based open-source mobile robot
No full textCurrently, commercially available intelligent transport robots that are capable of carrying up to 90 kg of load can cost 1500. Furthermore, ROMR offers a simple yet robust framework for contextualizing simultaneous localization and mapping (SLAM) algorithms, an essential prerequisite for autonomous robot navigation. The robustness and performance of the ROMR were validated through real-world and simulation experiments. All the design, construction and software files are freely available online under the GNU GPL v3 license at https://doi.org/10.17605/OSF.IO/K83X7. A descriptive video of ROMR can be found at https://osf.io/ku8ag
Power Relations and Social Classes in Pengakuan Pariyem by Linus Suryadi AG: Reflection of Masculine Ideology
No full textThe study aims to explore power relations and social classes as the reflections of the masculine ideology of the author in the novel Pengakuan Pariyem by Linus Suryadi AG. The theories implemented in the study are van Dijk’s power relations and social classes theory and Connell’s masculinity theory. The study is qualitative descriptive and applies the Critical Discourse Analysis (CDA) method, used to dismantle the ideology that is produced and reproduced through the language within the novel. The research data are lingual units that indicate power relations and social classes which simultaneously reflect the notion of masculinity. The results of the study are as follows. First, Pariyem as the central character in the novel lives within a hierarchical and dualistic Javanese society. Her submission as the babu (housemaid) of a priyayi (noble) family does not only lead Pariyem to be dominated symbolically, but also legitimizes the priyayi (aristocrats) power over wong cilik (commoners). It is reinforced by the representations of the priyayis’ world views in terms of culture, aristocracy, bureaucracy, and education orientation. It shows that priyayis are culturally dominant. Secondly, since Pariyem is a character created by a male author, her behaviors and actions reflect the ideology of masculinity. Rather than voicing women, the power relations that Pariyem experiences through the events constructed in the novel show that she embodies the masculine ideology, or masculinity.
A Detector System for Light–Element Analysis using a Nuclear Microprobe : for Applications in Geoscience
No full textI detta arbete har två analysmetoder med mycket hög känslighet för att mäta väte och bor utvecklats. Dessa har tillämpats på geologiska material där de kan vara ett verktyg i att svara på frågeställningar gällande b.la. jordskorpans utveckling och flödet av vatten på jorden. Metoderna kan mäta en väte- eller bor-atom bland en miljon andra atomer. Jonstråleanalys är ett fält inom den tillämpade fysiken som använder sig av strålar med laddade partiklar, vanligtvis protoner (väteatomkärnor) eller alfapartiklar (heliumatomkärnor) med hög energi för att genomföra grundämnesanalys av prover. De laddade partiklarna accelereras med hjälp av en accelerator upp till en energi av ca 3 MeV, vilket motsvaras av att partikeln har accelererats av det elektriska fältet från en spänning på 3 miljoner volt över en sträcka på en meter. Då dessa partiklar skjuts in i provet sker en mängd reaktioner och kollisioner med både atomernas elektroner och med atomkärnorna i provet. I en del av dessa reaktioner uppstår högenergetisk elektromagnetiskstrålning, i form av röntgen- eller gamma-strålning. Det kan också sändas ut laddade partiklar från provet, antingen i form av kärnreaktionsprodukter eller spridda partiklar från jonstrålen. Med rätt detektorutrustning kan denna strålning mätas och slutsatser kan dras om provets massfördelning och koncentrationen av olika grundämnen. Jonstrålen kan fokuseras ner till en tusendels millimeter och flyttas över provet, och på så vis bestrålas endast en liten del av provet åt gången. Genom att sedan flytta strålen över provet kan kartor över provets grundämneskoncentration och massfördelning skapas. I de flesta fall går det även att få ut på vilket djup i provet som grundämnet befinner på. Med hjälp av denna tredimensionella information kan man t.ex. studera hur olika ämnen fördelar sig i provet.Jonstråleanalysmetoderna kan med lätthet detektera de flesta grundämnena i det periodiska systemet. De svåra grundämnena är de som är lättare än aluminium. Dessa grundämnen är svåra eftersom sannolikheten för att de laddade partiklarna växelverkar med de lätta atomerna är liten för de reaktioner som används av de vanligaste jonanalysmetoderna.Målet med detta arbete är att utveckla redan existerande jonstråletekniker för att mäta väte, tungt väte (en vätekärna med en extra neutron) och bor. Analysen av förhållandet mellan väte och tungt väte utförs genom att en tung-vätekärna skjuts in i provet och om den kolliderar med en väteatom (vanligt väte eller tungt väte) så sprids både den inkommande väteatomkärnan och väteatomen ut genom provet och detekteras samtidigt parvis i två av de 2048 detektorerna som finns bakom provet. Boranalysen genomförs istället genom att en proton sänds in i provet och när denna stöter på en boratom så sker en kärnreaktion i provet. Vid kärnreaktionen bildas tre stycken högenergetiska heliumkärnor. Genom att detektera dessa kan koncentrationen av bor bestämmas
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