1,720,953 research outputs found
Learners’ problem-solving processes in linear programming at selected schools of Lusaka district of Zambia.
Get PDFThesis of Master of Education in Mathematics Education.This study investigated problem-solving processes of Grade 12 learners in linear programming. A total of 24 Grade 12 learners and 2 teachers of Lusaka district of Zambia were purposively sampled for the study from two selected secondary schools. The study employed the qualitative research approach which followed a descriptive case study design. Data was collected using lesson observations, semi-structured interviews and focus group discussions. Thematic analysis was used to analyse data. Polya’s four stages of problem solving: understand the problem, devise the plan(s), execute the plan(s) and looking back, and also the cognitive process dimension of the revised Bloom’s taxonomy guided the analysis of the data. The study
was guided by the following research questions: How do Grade 12 learners engage in solving problems in linear programming? What factors affect Grade 12 learners’ problem-solving processes in linear programming problems? How can Grade 12 learners’ problem-solving processes in linear programming be enhanced? The findings showed that learners in their quest to understand linear programming questions would read the question(s) at least once, though it is not a guarantee for correct solution, they would identify key statements and list phrases with their associated mathematical symbols, and the cognitive demands at this stage were retrieving and recognising factual knowledge. At the devise-a-plan stage, learners were able to transform the conditional statements into inequalities, devise tables of values showing possible pair of coordinates and showed rough-workings. Although, some learners experienced difficulties in comprehending the language of linear programming which led to deriving incorrect inequalities. At this stage, cognitive demands included interpreting and translating the linear programming problem(s) to construct their own meaning and organise facts. At the execute the plan(s) stage, learners could graph the inequalities, identify the feasible region with its boundary points, derive the profit function, test the boundary points into the profit function to determine the pairs of coordinates (x, y) that would yield the max/minimum profit and calculate the maximum/minimum profit. However, some learners experienced difficulties in arriving at correct solutions owing to lack of procedural and conceptual knowledge on how to graph the inequalities and calculating the maximum profit. This stage involved different cognitive levels from Applying through to creating and learners would engage in different cognitive processes from applying inequalities to deriving the feasible region, to evaluating the maximum/minimum profit. The findings further showed that after solving problems in linear programming, learners made little or no effort to engage in a critical examination of the solution arrived at, so as to ascertain whether it is correct and whether the plan can be used to solve another problem(s). At this stage, learners were also operating at the evaluating cognitive level and could engage in the cognitive process of verification and reflection on the problem-solving processes applied for mistake identification and knowledge consolidation. The study showed that learners’ problem-solving processes were constrained by the misunderstanding of the mathematical language of linear programming, poor foundation in pre-requisite knowledge of linear programming, inconsistency of shading the unwanted region at junior and senior secondary levels and lack
of monitoring skills for checking the steps of their solving process affected the learners’ problem-solving processes as they were unable to identify and correct errors and mistakes. To enhance or improve learners’ problem-solving processes, it was suggested that there is need for teachers to be ensuring that learners have the prerequisite knowledge before introducing Linear Programming and there is need for consistency of shading either the unwanted or wanted region at both junior and secondary level to prevent learner misconception. It was further suggested that there is need to promote learner group-working as an approach to teaching linear programming. More learner interaction with authentic and situational problems is another measure that may enhance problem solving process in linear programming
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
Author Under Sail The Imagination of Jack London, 1893-1902
No full textIn Author Under Sail, Jay Williams offers the first complete literary biography of Jack London as a professional writer engaged in the labor of writing. It examines the authorial imagination in London's work, the use of imagination in both his fiction and nonfiction, and the ways he defined imagination in the creative process in his business dealings with his publishers, editors, and agents. In this first volume of a two-volume biography, Williams traverses the years 1893 to 1902, from London's "Story of a Typhoon" to The People of the Abyss. The Jack London who emerges in the pages of Author Under Sail is a writer whose partnership with publishers, most notably his productive alliance with George Brett of Macmillan, was one of the most formative in American literary history. London pioneered many author models during the heyday of realism and naturalism, blurring the boundaries of these popular genres by focusing on absorption and theatricality and the representation of the seen and unseen. London created an impassioned, sincere, and extremely personal realism unlike that of other American writers of the time. Author Under Sail is a literary tour de force that reveals the full range of London as writer, creative citizen, and entrepreneur at the same time it sheds light on the maverick side of machine-age literature.Intro -- Title Page -- Copyright Page -- Dedication -- Contents -- Acknowledgments -- Introduction -- 1. Spirit Truth -- 2. From Absorption to Theatricality and Back Again -- 3. "I Will Build a New Present" -- 4. Sons as Authors -- 5. Fathers as Publishers -- 6. The Daughter as Author -- 7. Lovers as Authors -- 8. At Sea with the Family -- 9. Yellow News, Yellow Stories -- 10. The Return Home -- Notes -- Bibliography -- Index -- About Jay WilliamsIn Author Under Sail, Jay Williams offers the first complete literary biography of Jack London as a professional writer engaged in the labor of writing. It examines the authorial imagination in London's work, the use of imagination in both his fiction and nonfiction, and the ways he defined imagination in the creative process in his business dealings with his publishers, editors, and agents. In this first volume of a two-volume biography, Williams traverses the years 1893 to 1902, from London's "Story of a Typhoon" to The People of the Abyss. The Jack London who emerges in the pages of Author Under Sail is a writer whose partnership with publishers, most notably his productive alliance with George Brett of Macmillan, was one of the most formative in American literary history. London pioneered many author models during the heyday of realism and naturalism, blurring the boundaries of these popular genres by focusing on absorption and theatricality and the representation of the seen and unseen. London created an impassioned, sincere, and extremely personal realism unlike that of other American writers of the time. Author Under Sail is a literary tour de force that reveals the full range of London as writer, creative citizen, and entrepreneur at the same time it sheds light on the maverick side of machine-age literature.Description based on publisher supplied metadata and other sources.Electronic reproduction. Ann Arbor, Michigan : ProQuest Ebook Central, YYYY. Available via World Wide Web. Access may be limited to ProQuest Ebook Central affiliated libraries
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