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Marwan Marwan
Jurusan Matematika, Universitas Syiah Kuala Banda Aceh
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Perubahan Bentuk pada Perambatan Signal Bi-kromatik dan Pengaruhnya terhadap Amplitudo Maksimum Marwan Marwan; Andonowati Andonowati
Jurnal Matematika & Sains Vol 8, No 2 (2003)
Publisher : Institut Teknologi Bandung

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Abstract

We consider the signal propagation from a wave generation often simulated in hydrodynamic laboratories. As a particular case, we will study a deformation from the evolution of a bi-chromatic signal. The signal is a superposition of two mono-chromatics with different of frequencies. We use a KdV equation with exact dispersion as a model for uni-directional surface gravity waves. Using a direct expansion in the form of power series of the elevation signal amplitude gives a result to resonance in the third order. We correct this expansion using a modified Linstead-Poincare technique. From this, a non linear dispersion relating the wave number, amplitude and frequency can be derived. If the frequency different between the two mono-chromatics forming the bi-chromatics signal is small then the effect of third order side bands can dominate the second order terms. The coefficient of these terms contain an expression in the form of ()2/κqq. Deformations of bi-chromatic signal are significantly effected by this non linear dispersion as well as the side band terms. In this paper we will study the deformation of bi-chromatic signal propagation through the new approach called Maximal Temporal Amplitude (MTA).
The analysis of factors influencing the motivation of subdistrict north padang high schoolers in following tuition classes program Linda oktavianti; Yunia Wardi; Marwan Marwan
International Conferences on Educational, Social Sciences and Technology
Publisher : Fakultas Ilmu Pendidikan UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29210/2018123

Abstract

The aim of the research is to establish the factors that determine motivation of students in following tuition classes. The population of the studyinclude students of senior high school in subdistrict of North Padang. The sample of the study determined by using the area sampling method with 284 people as the respondent. The tool for analyzing data in this study is factor analysis. The result of the study shows there is a reduction from 20 to 19 variables in determine the motivation ofstudents who follow the tuition classes. Those 19 variables compose 4 main factors: (a) learning competition factors, (b) motivational learning support factors, (c) learning quality factors, (d) learning achievement factors. The trial of those variables has been tested by KMO and shows a number of 0,851 which mean it is include in satisfaction chategory.
Co-Authors Andonowati Andonowati Linda oktavianti Yunia Wardi