1,720,961 research outputs found
Penerapan Project Based Learning untuk Meningkatkan Hasil Belajar Pemrograman Web Peserta Didik Kelas X Tkj B SMKN 1 Magelang Semester 2 Tahun Pelajaran 2020/2021
Get PDFPenelitian ini bertujuan mengetahui apakah penggunaan metode PBL dapat meningkatkan hasil belajar siswa dan meningkatkan ketuntasan belajar peserta didik kelas X TKJ SMKN 1 Magelang. Penelitian ini menggunakan metode penelitian tindakan kelas yang memiliki 2 siklus. Sebelum siklus dilakukan hasil belajar siswa rendah dan tingkat ketuntasan belajar siswa hanya 8,57%, hal ini belum memenuhi target ketuntasan belajar yaitu 80%. Siklus pembelajaran dilakuakn pada semester 2. Siklus pertama menerapkan PBL murni dengan menggunakan kelompok dan siklus ke 2 menggunakan PBL Asana. Hasil penelitian menunjukkan adanya peningkatan tingkat ketuntasan belajar siswa menjadi 91, 43%
A Direct Multiple Shooting Method for Missile Trajectory Optimization with The Terminal Bunt Manoeuvre
Get PDFNumerical solution of constrained nonlinear optimal control problem is an important field in a wide range of applications in science and engineering. The real time solution for an optimal control problem is a challenge issue especially the state constrained handling. Missile trajectory shaping with terminal bunt manoeuvre with state constaints is addressed. The problem can be stated as an optimal control problem in which an objective function is minimised satisfying a series of constraints on the trajectory which includes state and control constraints. Numerical solution based on a direct multiple shooting is proposed. As an example the method has been implemented to a design of optimal trajectory for a missile where the missile must struck the target by vertical dive. The qualitative analysis and physical interpretation of the numerical solutions are given
Penerapan Model Predictive Control (MPC) pada Kapal Autopilot dengan Lintasan Tertentu
Get PDFPermasalahan dalam kendali kapal salah satunya adalah path following. Path following bertujuan mengarahkan kapal untuk mengikuti jalur yang ditentukan. Pada penelitian ini dikaji bentuk pengendali untuk memperkuat kendali terhadap masalah path following. Kapal yang menjadi objek pada penelitian ini adalah kapal yang berjenis underactuated. Kapal underactuated merupakan kapal dengan jumlah variabel yang dikontrol lebih banyak dari jumlah aktuator, dimana aktuator adalah sebuah alat yang digunakan untuk mengontrol sebuah mekanisme atau sistem. Langkah pertama yang dilakukan adalah mentransformasikan model dinamik kapal terhadap lintasan sehingga didapatkan model dinamik kapal yang baru berupa error posisi kapal terhadap lintasan dan error orientasi (error sudut kapal). Selanjutnya digunakan pengendali MPC untuk menstabilkan gerak kapal.. Hasil simulasi menunjukkan bahwa dengan pengendali MPC, error dari path following konvergen ke nol dan kapal dapat mengikuti lintasan yang diharapkan
Minimum-Energy Control of Two-Link Manipulator WithPure State Constraints
Get PDFThis paper presents an analysis and numerical solutions of the minimum-energy control of two-link robot manipulator. The minimum-energy control point-to-point trajectory is investigated subject to control constraints and state constraints on the angular velocities. The numerical solutions are solved by transforming the original problem into a nonlinear programming problem. The mathematical analysis of the optimal control problems is done based on the numerical results using an indirect method. The necessary conditions can be stated as a multi-point boundary value problems
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
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