686 research outputs found
Dr. Edwin Wright Letters: A. L. Sawle
No full textLetter - Mr. A. L. Sawle speaks of coming to Athabasca Landing in 1908 take over as the second manager of the Imperial Bank. He speaks of his time with the Athabasca Board of Trade and of assisting with the first Agricultural Exhibition. The names of settlers are mentioned, as well as a general description of the "early days of Athabasca" (2 pages
Reactive power support capability of flyback microinverter with pseudo-dc link
No full textThesis: S.M., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2015.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 (pages 101-102).The flyback micro-inverter with a pseudo-dc link has traditionally been used for injecting only active power in to the power distribution network. In this thesis, a new approach will be proposed to control the micro-inverter to supply reactive power to the grid which is important for grid voltage support. Circuit models and mathematical analyses are developed to explain underlying issues such as harmonic distortion, and power losses, which can limit the reactive power support capability. A novel current decoupling circuit is proposed to effectively mitigate zero crossing distortion. Simulations and experimental results are provided to support the theoretical propositions.by Edwin Fonkwe Fongang.S.M
Academic authorship: who, why and in what order?
No full textWe are frequently asked by our colleagues and students for advice on authorship for scientific articles. This short paper outlines some of the issues that we have experienced and the advice we usually provide. This editorial follows on from our work on submitting a paper1 and also on writing an academic paper for publication.2 We should like to start by noting that, in our view, there exist two separate, but related issues: (a) authorship and (b) order of authors. The issue of authorship centres on the notion of who can be an author, who should be an author and who definitely should not be an author, and this is partly discipline specific. The second issue, the order of authors, is usually dictated by the academic tradition from which the work comes. One can immediately envisage disagreements within a multi-disciplinary team of researchers where members of the team may have different approaches to authorship order
Boys of England and Edwin J. Brett, 1866-99
No full textBoys of England was a Victorian boys' periodical. It was published weekly by Edwin J. Brett from 1866 to 1899, initially from the Fleet Street offices of the Newsagents'
Publishing Company, and later from Brett's own `Boys of England Office'. It was the first periodical of its kind, and achieved a large sale amongst eager youngsters.
The purpose of this thesis is to provide a general history of BOE and Brett, neither of which has yet been attempted. More specifically, the thesis is intended to address
misconceptions regarding Brett and his work. Historians of boys' periodical literature have tended to portray Brett's papers as largely supportive of middle class hegemony. They
argue that they failed to connect with the lives of their upper working and lower middle class readers. However, this thesis contends that in actual fact BOE engaged closely with
the lives of its readership, comprised mainly of boys from the `respectable' working classes. Therefore, BOE should rightly be considered an important, indigenous component
of working class society and culture in mid to late Victorian Britain.
To provide as comprehensive an analysis as possible, the thesis is divided into three sections: `Paper and Proprietor'; `Content'; `Response'. These sections are divided into further chapters, each exploring a salient facet of BOE and Brett. Some of these engage with, and challenge, the existing historiography of boys' periodical literature. Others introduce historiographies previously remote from the study of boys' papers, widening the
remit of this relatively self-contained field. Some examine entirely unstudied, or largely understudied, subject matter.
Ultimately, this thesis is intended to make a valuable contribution not only to the historiography of boys' papers specifically, and children's literature in general, but also to the wider historiographies of Victorian social and cultural history and the Victorian working class
The differentiation of the embryonic chick otocyst on the chorioallantoic membrane, 1959
No full textPhotochemical reaction of the 5,7,7,12,14,14-hexamethyl-1,4,8,11-tetraazacyclotetradecanenickel (II)-y-diazido-5,7,7,12,14,14-hexamethyl-l,4, 8,11-tetraazacyclotetradecanenickel (II) tetrafluoroborate, 1980
No full textPhotolysis of methanolic solutions of (Ni(tet-b)N3)2^2 +, containing ammonia, various olefins and ammonium tetrafluoroborate, results in the formation of hydrazine and possibly aziridine derivatives. The data have been interpreted in terms of the formation of a coordinated nitrene. A nitrene intermediate is also implicated by the kinetic results. Quantum yields were determined at 340 nm. The kinetics of the photochemical reactions have been studied and a mechanism is proposed to explain the primary steps induced by photolysis. Scavenger concentration studies show that the quantum yield of hydrazine increases with increasing concentration of ammonia and decreases with increasing concentration of olefin. The results suggest that the olefin does effectively scavenge the intermediate to form aziride derivatives
Writer Identification in Historical Handwritten Documents: A Latin Dataset and a Benchmark
No full textWriter identification refers to the process of determining or attributing the authorship of a document to a specific individual through the analysis of various elements such as writing style, linguistic characteristics, and other textual features. This is a relevant task in heterogeneous fields such as cybersecurity, forensics, or linguistics and becomes particularly challenging when considering historical documents. In fact, the latter might present deterioration due to time, often lack signatures, and could be authored by multiple people. Complicating matters further, scribes were trained to mimic handwriting meticulously when copying manuscripts, making author identification of such documents even more difficult. In this context, this paper introduces a curated collection of Latin documents from the Genesis and Gospel of Matthew specifically gathered for the purpose of exploring the writer identification task. In particular, the dataset comprises over 400 pages, written by nine distinct persons. The primary objective is to explore the efficacy of state-of-the-art deep learning architectures in accurately ascribing historical texts to their rightful authors. To this end, this paper conducts extensive experiments, utilizing varying training set sizes and employing diverse pre-processing techniques to assess the performance and capabilities of these renowned models on the writer identification task while also providing the community with a baseline on the introduced collection
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Lord Lonsdale and his proteges: William Wordsworth and John Hardie
No full textTowards resilient plug-and-play microgrids
No full textThis electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.Thesis: Ph. D., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2019Cataloged from student-submitted PDF version of thesis.Includes bibliographical references (pages 159-164).Microgrids have the potential to increase renewable energy penetration, reduce costs, and improve reliability of the electric grid. However, today's microgrids are unreliable, lack true modularity, and operate with rudimentary control systems. This thesis research makes contributions in the areas of microgrid modeling and simulation; microgrid testing and model validation; and advanced control design and tools in microgrids. These contributions are a step toward design, commissioning, and operation of resilient plug-and-play (pnp) microgrids, which will pave the way towards a more sustainable and electric energy abundant future for all."Facebook Inc. funded a portion of my PhD trajectory (2017 - 2019) by way of a Research Fellowship"by Edwin Fonkwe Fongang.Ph. D.Ph.D. Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Scienc
Osbornellus emmeni Dominguez & Godoy 2010, sp. nov.
No full textOsbornellus emmeni Domínguez & Godoy, sp. nov. (Figs. 21a–21e) Description. Length: 5.7 mm. Member of the O. auronitens group (Fig. 1a). General description as in O. eberhardi. Male genitalia: Pygofer less than twice as long as width, moderately projected posteriorly, narrow and rounded at apex; with very long macrosetae dispersed along apical half (Fig. 21a). Valve triangular. Plates very long, rounded at apex and with filamentous setae (Fig. 21b). Style with apophysis short and truncate (Fig. 21c). Aedeagus in ventral view wide basally, then slightly narrowed; shaft with apex truncate and slightly shorter than ventral processes (Fig. 21d). Ventral processes arising at one-third the length of the aedeagus, separated distally, tapered, apices sharp. Shaft in lateral view curved dorsad; dorsal projection short and truncate. Gonopore apical. Ventral processes curved dorsad, tapered, apex sharp, separated distally from shaft (Fig. 21e). Diagnosis. Very similar in appearance to O. barletti, but in ventral view the aedeagal shaft and ventral processes of O. emmeni are slightly curved dorsad. In O. barletti they are more curved, especially the shaft. Distribution. Known only from Costa Rica; 2050 m. Etymology. This species is named in honor of Daniel Emmen in recognition of his loan of specimens and providing laboratory facilities for the first author. Type material: Holotype, male, COSTA RICA: Puntarenas, Coto Brus, Zona Protectora Las Tablas, Mellizas, La Quijada del Diablo. 2050 m, 13-IX-12-X-1996, L. Angulo (INBio). Paratype: COSTA RICA: 1 male, Cartago R.F. Rio Macho. Cerro de la Muerte, 3000, Mar-Abr. 1990. P.Hanson (MZCR). Malaise. 2 male, 7 female, Puntarenas, Coto Brus, Zona Protectora Las Tablas, Mellizas, La Quijada del Diablo. 2050 m, 13-IX-12-X-1996, L. Angulo (BMNH, CAS, INBio, USNM).Published as part of Domínguez, Edwin & Godoy, Carolina, 2010, Taxonomic review of the genus Osbornellus Ball (Hemiptera: Cicadellidae) in Central America 2702, pp. 1-106 in Zootaxa 2702 on page 2
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