1,952 research outputs found
1st international round robin test on safety characteristics of hybrid mixtures
No full textThere is no applicable existing standard for the determination of safety characteristics for hybrid mixtures. While developing a new standard in a joint research project in Germany first results from parameter studies led to a standard procedure that can be adopted by laboratories that are already testing dusts in the so called 20L-sphere with as little additional effort as necessary. In fact, one of the main objectives of this research project was to keep modifications and adjustments from the generally accepted dust testing procedures as easy and minimal as possible so as to limit potential deviations from one laboratory to another. In this first round robin test on hybrid mixtures ever, with methane as gas component and a specific corn starch as dust sample, the practicality of the whole procedure, the scattering of the results and the deviation between the testing apparatuses is investigated. This paper summarizes the experimental procedure adopted and objectives of the first round-robin phase involving three of the four original German companies, plus volunteering laboratories from Australia, Belgium, Czech Republic, France, Poland and P.R. China. The results will have an impact on the new standard and may lead to robust data for later simulation purposes.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.Fluid Mechanic
1993 New Car Data
No full textThis dataset, created by Robin H. Locke of St. Lawrence University, describes 93 new cars for the 1993 model year with 26 variables, including price, mpg ratings, and engine size. It also illustrates a broad range of statistical techniques such as box-whisker plot, confidence intervals, difference in means, one-way ANOVA, contingency table, scatterplot, regression, and correlation. If further research is required the author has included a list of references
Perceived effects of supplementary training: a phenomenographic study of math teachers' ongoing development
No full textThis phenomenographic study entitled “Perceived Effects of Supplementary Training – A Phenomenographic Study of Math Teacher’s Ongoing Development” presents the results of a survey taken by 189 math teachers regarding the perceived impact their supplementary training has had on the quality of their teaching. Five of these teachers were interviewed to provide in-depth data. The author, Robin Wilsson, is a student at the Master Program “Learning and leadership” at the department of Mathematical Sciences at Chalmers University of Technology. The survey contained questions about the types of supplementary training the teachers had participated in, and what their thoughts were on this. Matematiklyftet, a type of supplementary training developed by Skolverket, is of special importance because it aims at involving every math teacher in Sweden. A description of the phenomenographic approach is provided, and this method is used to evaluate the data from two survey questions. The semi-structured interviews are aimed at furthering the data gained from the survey by getting the personal views of teachers. The main conclusion is that Matematiklyftet was well received by the teachers involved in the study, and that supplementary training using similar methods should be implemented. Other conclusions include the fact that few of the teachers regard their official supplementary training as being effective, and that they wish to find new ways of teaching without using a text book
Cervico-thoracic kyphosis in a girl with Pierre Robin sequence
No full textCongenital cervico-thoracic kyphosis has been encountered in a girl with Pierre Robin sequence. The constellation of the spine malformation complex such as incomplete development of the vertebral bodies associated with defective ossification of the cervico-thoracic pedicles causing effectively the development of complete spinal cord injury at the kyphotic level of C7/T1 were present. Congenital kyphosis secondary to vertebral body hypoplasia has not been reported in connection with Pierre Robin sequence
Robert H. Thonhoff Collection, 1839-2013
No full textThe Robert H. Thonhoff Collection consists of research materials, newspapers, writings, artifacts, printed items, and published works representing the personal and professional activities of the Texas author, historian, teacher, and judge. The Collection also includes the papers of Thonhoff’s colleagues, fellow historians and authors: John Ogden Leal, Eric & Conchita Beerman, Ron Higginbotham, Maurice Ballard, Robin Ellis, Granville W. Hough, and Sr. Jose Ignacio Vasconcelos.
Much of the materials and research within the collection are photocopies.https://digitalcommons.tamusa.edu/findingaids/1179/thumbnail.jp
convex segmentation and mixed-integer footstep planning for a walking robot
No full textThesis: S.M., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2014.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 77-82).This work presents a novel formulation of the footstep planning problem as a mixed-integer convex optimization. The footstep planning problem involves choosing a set of footstep locations which a walking robot can follow to safely reach a goal through an environment with obstacles. Rather than attempting to avoid the obstacles, which would require nonconvex constraints, we use integer variables to assign each footstep to a convex region of obstacle-free terrain, while simultaneously optimizing its pose within that safe region. Since existing methods for generating convex obstacle-free regions were ill-suited to this task, we also present IRIS (Iterative Regional In Inflation by Semidefinite programming), a new method to generate such regions through a series of convex optimizations. Combining IRIS with the mixed-integer optimization gives a complete footstep planning architecture, which can produce complex footstep plans on height map data constructed from onboard sensors. We demonstrate the footstep planner in simulated environments and with real data sensed by the Atlas humanoid, and we discuss future applications to running robots, aerial vehicles, and robots with more than two legs.by Robin L. H. Deits.S.M
“An Author Out of Time”: Structural Parallelisms between H. P. Lovecraft and Local Color
No full text[eng] Traditional conceptions of literary history postulate that literary movements are consequent
and that the beginning of a new one means the end of the previous. Nonetheless, postmodern
revisions of the theory of literary analysis have entirely shifted the comprehension of time,
history, and literary history. Literary movements are seen as consecutive and co-influencing,
but postmodern waves of literary revisionism establish new insights on the development of
styles and stories. Such is the case of Howard Phillips Lovecraft, a United States horror and
science-fiction author who lived during the peaks of both Realism and Modernism, but whose
work cannot be encompassed within either movement. With the postmodern trend of literary
analysis, Lovecraft has been studied as a representative of 20th century Romanticism, and new
paths in his analysis have opened. This paper argues that the narrative structure of Lovecraft’s
“The Nameless City,” “The Festival,” The Shadow over Innsmouth, and The Shadow out of
Time follows that of the late 19th century local color trend of American Romanticism. Traits
such as the depth of detail in the descriptions of landscapes, traditions, and mannerisms; the
stereotypical role of the main and secondary characters; and the constant relation to the past
connect these cosmic horror texts to a style traditionally encompassing costumbrist depictions
of life in isolated rural communities. After analyzing the narrative structure of these works,
many parallelisms have been found between them and classic examples of local color
Improved cost energy comparison of permanent magnet generators for large offshore wind turbines
No full textThis paper investigates geared and direct-drive permanent magnet generators for a typical offshore wind turbine, providing a detailed comparison of various wind turbine drivetrain configurations in order to minimise the Cost of Energy. The permanent magnet generator topologies considered include a direct-drive machine and single stage, two-stage or three-stage gearbox driven generators. The cost of energy calculations are based on initial capital costs, the costs of manufacture, installation, operations and maintenance, with particular focus on improved calculations of the annual energy yield with better availability estimations and gearbox loss modelling
[Book reviews]
No full textReviews of Canadian Economic History, ed. M. H. Watkins and M. H. Grant, and Perspectives on Canadian Economic History (2nd edition), ed. D. McCalla and M. Huberman, and Farm, Factory and Fortune, ed. K. Inwoo
Theology in suspense : how the detective fiction of P.D. James provokes theological thought
No full textElectronic redacted version excludes material for which permission has not been granted by the rights holderThe following dissertation argues that the detective fiction of P.D. James
provokes her readers to think theologically. I present evidence from the body of
James’s work, including her detective fiction that features the Detective Adam
Dalgliesh, as well as her other novels, autobiography, and non-fiction work. I also
present a brief history of detective fiction. This history provides the reader with a
better understanding of how P.D James is influenced by the detective genre as well as
how she stands apart from the genre’s traditions.
This dissertation relies on an interview that I conducted with P.D. James in
November, 2008. During the interview, I asked James how Christianity has
influenced her detective fiction and her responses greatly contribute to this
dissertation. However, James’s novels should be interpreted and explored in the
manner that they are received by the reader. How the reader receives and responds to
the novels, not only how James writes the novels, is what causes her stories to
provoke theological thinking.
By examining Christian symbolism that is present in setting, character, the
Detective Adam Dalgliesh, and plot, this dissertation seeks to assert that James
contributes to a theological conversation through her popular detective fiction
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