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Comparative effectiveness of actual practical and alternative practical chemistry teaching models on students’ achievement in volumetric analysis
Get PDFThis research attempts to compare the academic achievement of learners who were taught practical lessons
in volumetric analysis using conventional materials in schools with equipped laboratory facilities and practical
lessons in volumetric analysis taught using improvised materials as an alternative approach in schools without
well-equipped laboratory facilities in Sidama zone, SNNPRS, Ethiopia. A control group was taught with the
traditional method. Two schools were assigned in each group based on the purposive sampling technique, on
the criteria whether the school had laboratory facilities and/ or not. The quantitative research method was
employed in generating data through the blueprint of quasi-experimental non-equivalent group research
design. Three instruments were used for data collection such as achievement test(ATQ),SQCL-questionnaire
and TQ-questionnaire. SQC-questionnaire was administered to two hundred learners in both actual and
alternative practical chemistry teaching models schools’ groups. It compared the perceptions of learners for
only after an intervention.TQ-questionnaire was administered to sixty five teachers found in all groups. The
scores of the three instruments were analyzed by using descriptive and inferential statistics. Five hypotheses
were set based on five research questions and tested at a 0.05 significance level. According to the result of
the findings that existed among after the three interventions for academic achievements F(2,297) =3.875,
P=0.022, partial eta squared = .0254 is significant in difference. thereby using Tukey’s HSD post hoc multiple
comparisons (1) MD=4.911, P =.357, P > 0.05 indicate that there was non-significant difference in academic
achievement between practical lessons in volumetric analysis who were taught using conventional and
improvised materials as an alternative method.The hypothesis set based on the research question one was
accepted; and (2) there was a significant difference in academic achievement between learners who were
taught practical lessons in volumetric analysis using conventional materials and traditional method. The
hypothesis was also accepted since MD =1.491, P = 0.016, P < 0.05, this difference visualized as that
conventional materials (Mean=59.630, SD=10.86) and traditional method(Mean =55.48,SD =10.16) (3) there
was a non-significant difference in academic achievement between learners who were taught practical
lessons in volumetric analysis using traditional method of teaching and who were taught with improvised
materials. Thus, the hypothesis of the research question three was not accepted. since the Tukey’s HSD post hoc MD =1.491 P =.336, P > 0.05,and (4) Based on the findings for linearly combined all items after
intervention t(198) =.246, P =.004, P < 0.05 indicate a significant difference of learners’ perception between
learners who were taught practical lessons in volumetric analysis using conventional materials and
improvised materials. The hypothesis was rejected. The mean and standard deviation value indicates the
differences in learners’ perception that existed between groups were taught practical lessons in volumetric
analysis using improvised materials (M=3.5, SD=0.421) and Conventional materials (M=3.3, SD =0.453). This
difference inferred that learners perceived teaching practical lessons using improvised materials is a good
alternative in the absence of conventional materials due to occurrence of financial constraints or other
factors.(5) Finally, based on the finding for linearly combined mean values of all items, the ANOVA test result
F(2,62) =10.653, p =.000, p < 0.05 was significant in teachers’ perception. thereby using Tukey’s post hoc
multiple comparisons teachers’ perceptions between the groups who were taught practical lessons in
volumetric analysis using improvised materials and traditional method MD = -0.220, STD error =0.160, P
=0.354, P > 0.05, is non-significant. Improvised materials versus conventional materials MD =.44545, STD
error .15, P =.013, P < 0.05 is significant; conventional versus traditional method MD =.669, STD error =.141,
P =0, P < 0.05, significant. Further, the mean and standard deviation values for significant results indicate the
differences in teachers’ perception that existed between practicals were taught by improvised materials
(M=4.161,SD=0.541) and conventional materials (Mean=3.72,SD=0.435); traditional method
(M=4.385,SD,0.497) versus conventional (Mean =3.72,SD =0.435). In conclusion, teaching practical lessons
of volumetric analysis using improvised materials is a good strategy in the absence of conventional materials
or in conditions where financial constraints would not permit the use of conventional materials or some other
factors.Ph. D. (Mathematics, Science and Technology Education with specialization in Chemistry Education)Science and Technology Educatio
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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