1,720,954 research outputs found
PENGENDALIAN CHAOS MENGGUNAKAN SLIDING MODE CONTROL (SMC) PADA SISTEM PERSAMAAN RÓ¦SSLER YANG TERMODIFIKASI
Full text linkAbstrak Sistem Persamaan RÓ§ssler yang termodifikasi merupakan suatu sistem persamaan yang berkaitan dengan kinetika kimia. Pada sistem tersebut akan terjadi osilasi secara terus menerus menurut waktu t. Dalam penelitian ini, terlebih dahulu dianalisa stabilitas yang terjadi di sekitar titik setimbang. Kemudian, dengan menggunakan rata-rata Lyapunov exponent, diperoleh bahwa Sistem Persamaan RÓ§ssler yang termodifikasi merupakan suatu system yang bersifat chaos. Terakhir, diterapkan Sliding Mode Control (SMC) untuk mengontrol perilaku sistem. Dari hal tersebut perilaku sistem yang awalnya tidak stabil dan bersifat chaos dapat diarahkan menuju titik setimbang. Kata kunci : Sistem Persamaan RÓ§ssler, Chaos, Sliding Mode Control (SMC). Â Abstract Rossler Equation System is a system of modified equations associated with the chemical kinetics. In such a system will be oscillating continuously by time t. In this study, first analyzed the stability that occurs around the point of equilibrium. Then, using the average Lyapunov exponent, found that a modified Rossler Equation System is a system that is chaotic. Finally, applied to Sliding Mode Control (SMC) to control the behavior of the system. From this behavior of a system that is unstable and chaotic nature can be directed toward the equilibrium. Keywords: Rossler Equation System, Chaos, Sliding Mode Control (SMC)
Analyses of Meta-Cognition of Middle School Students Based on Gender Differences in Solving Flat-Rectangular Space Problems
Full text linkStudents with well-developed metacognition tend to excel in problem-solving. This study examines the metacognitive skills of junior high school (MTs) students in solving three-dimensional geometric problems, focusing on gender differences. The analysis involves three stages of metacognition: planning, monitoring, and evaluation. Using a qualitative descriptive approach, the study selected three male and three female students from 35 ninth-grade students. Data were gathered through mathematics learning outcome documents, metacognitive essay tests, and interview guidelines. The results reveal that male students face challenges across all three metacognitive stages when solving geometric problems, whereas female students encounter difficulties primarily at the evaluation stage. These findings highlight the need for targeted interventions to strengthen metacognitive skills, particularly in problem-solving contexts, while addressing gender-specific challenges
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
Full text link“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
Full text linkWe 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
Full text linkWe 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
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