PEMANFAATAN MEDIA DAN SUMBER BELAJAR ABAD 21

ABSTRAK Artikel ini bertujuan  untuk mendeskripsikan tentang pemanfaatan sumber dan media belajar di era modernisasi dan globalisasi seperti di abad ke 21 ini, pendidikan menjadi semakin penting untuk menjamin peserta didik memiliki keterampilan (life skills). Hal ini sesuai dengan tuntutan abad 21 dimana peserta didik harus memiliki kompetensi berpikir dan belajar. Kompetensi-kompetensi tersebut diantaranya adalah kompetensi komunikasi (communication), kolaborasi (collaboration), berpikir kritis dan memecahkan masalah (critical thinking and problem solving) kreatif dan inovatif (creativity and innovation). Dalam  pesatnya perkembangan IPTEK menuntut berbagai perubahan mendasar termasuk perubahan dalam memanfaatkan penggunaan media dan sumber belajar. Sehingga dengan adanya media dan sumber belajar yang lebih bervariatif, maka akan menjawab berbagai permasalahan pembelajaran sehingga akan menciptakan tujuan hasil pembelajaran yang lebih maksimal. Kata kunci: Media, Sumber, Belajar   ABSTRACT   This article aims to describe the use of learning resources and media in the era of modernization and globalization such as in this 21st century, Education to be more and more important to guarantee the member of education to have skills (life skills). It is in accordance with the 21st century pursuit, where they should have the competence of thinking and learning. Those competences are such as competence to communicate, collaborate, think critically, solve problems, and to be creative and innovative. Along with rapid development of Science and Technology it pursue many basic – changes including the changes in utilizing the use of media and learning resources. So that with the media and learning resources that are more varied, it will answer various learning problems so that it will create a goal of learning outcomes that is more leverage. Keyword: Media, Resources, Learning

Waves and Instabilities Due to Inhomogeneous Plasma Flows and Formation of Nonlinear Structures

The effects of the constant and space-dependant flows of plasma species on the linear and nonlinear dynamics of low frequency electrostatic and electromagnetic waves are studied by using fluid theory. The nonlinear structures such as solitons, double layers and vortices produced by plasma flows are studied under local approximation. The theoretical model is applied to space and astrophysical plasmas where the particle velocity distributions exhibit non-Maxwellian behavior, in general. Therefore the nonlinear structures have also been investigated considering kappa, qnonextensive and Cairn''s distributions etc. of lighter species. The characteristics of these structures such as the width and amplitude of solitons and double layers are modified in a non-Maxwellian plasma significantly as compared to those when the lighter particles are Maxwellian. The Sagdeev pseudo-potential appraoch has been employed to get the strongly nonlinear dynamics for the formation of solitons and double layers (DLs), while the small amplitude limits are also obtained. Both uniform and sheared flows give rise to instabilities of electrostatic and electromagnetic waves. The effects of non-Maxwellian distributions on the new type of drift wave, which appear even in density homogeneous plasmas and, appear due to sheared flow of electrons and ions in the stationary dust plasmas have been pointed out. The coupling of this mode with Alfvén wave is also investigated and electromagnetic vortices are obtained. Comparison of this research work with initial studies is also presented and theoretical model is applied to Saturn''s and Jupiter’s magnetosphere for the sake of illustrations. An analysis of the sheared flow driven instabilities with kinetic approach is also presented and comparison with fluid theory is discussed.