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All Journal International Journal of Renewable Energy Development BERKALA FISIKA Jurnal KOMUNIKA
Mukhtar Effendi
Universitas Jenderal Soedirman
Religion Chemistry Energy Library & Information Science Physics

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PERANAN INTERNET SEBAGAI MEDIA KOMUNIKASI Effendi, Mukhtar
KOMUNIKA: Jurnal Dakwah dan Komunikasi Vol 3 No 2 (2009)
Publisher : Fakultas Dakwah IAIN Purwokerto

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1669.915 KB) | DOI: 10.24090/komunika.v3i2.143

Abstract

Currently, the Internet not only become an alternative communication media, but even helped form a newcommunication patterns. Nevertheless, there has been no communication science theories that can accommodatecommunication through this internet. Meanwhile, theories of communication that already exist that can be used for runwayapproach to Internet research is the theory of the uses and gratifications which focuses on media, passive and activecommunicants. Meanwhile, supporters of reference is still a concept rather than a middle-range theory. This paper seeks toexplore existing concepts in communication via the Internet based on theories that have existed from the science ofcommunication
PENGETAHUAN ILMIAH DAN KEBENARAN DALAM ILMU KOMUNIKASI Effendi, Mukhtar
KOMUNIKA: Jurnal Dakwah dan Komunikasi Vol 6 No 2 (2012)
Publisher : Fakultas Dakwah IAIN Purwokerto

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (158.471 KB) | DOI: 10.24090/komunika.v6i2.361

Abstract

Human beings have a high curiousity that leads them to produce knowledge that willhelp them to solve their problems. Their curiousity continues to exist although they have beenable to solve their problem. Through this process, the production and reproduction ofknowledge continues to exist.From the academic perspective, the answer to the curiousity of human beings areaccepted and acknowledged when it is scientifically accepted. This leads to determine the trueand false knowledge. The true knowledge are achieved when it has scientific standards ofknowledge.This article discussed the scientific truth in knowledge, especially communicationstudy which is developing rapidly. As a new science, communication study has some criteriaand measurement of truth which have some differences with other social sciences. However,communication study is really a part of social science that makes human being as its mainstudy.
PENINGKATAN SIFAT MAGNETIK MATERIAL HEMATIT MELALUI SUBTITUSI BARIUM DAN KONTROL TEMPERATUR SINTERING Widanarto, Wahyu; Fauzi, Fuzi Nurrahman; Cahyanto, Wahyu Tri; Effendi, Mukhtar
BERKALA FISIKA 2015: Berkala Fisika Vol. 18 No. 4 Tahun 2015
Publisher : BERKALA FISIKA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (401.079 KB)

Abstract

Ferrite magnet or ceramic magnet is a competitive product in the magnet market due to low price, corrosion resistant and chemically stable. Barium hexa-ferrite magnet is one of ferrite magnet which is mostly used as magnetic storage and electronic devices based on nanotechnology. Barium hexa- ferrites are synthetized through solid state reaction method at sintering temperatures of 1100 °C with the composition (100-x)Fe2O3 : xBaCO3 , where x = 0 and 20 in mol % . Results of XRD characterization show that the diffraction peaks of XRD spectrum is dominated by the peaks of barium ferrite crystal with a hexagonal crystal system. Magnetic properties of Fe2O3 material doped with barium carbonate of 20 mol % and sintered at 1100 °C increase significantly compared to the others. This simple and inexpensive method is very promising for the manufacture of barium hexa-ferrite materials with natural ferrite as the main material.Keywords: Iron sand, barium ferrite, structure, magnetic properties
Numerical Analysis of Energy Converter for Wave Energy Power Generation-Pendulum System Aminuddin, Jamrud; Effendi, Mukhtar; Nurhayati, Nurhayati; Widiyani, Agustina; Razi, Pakhrur; Wihantoro, Wihantoro; Aziz, Abdullah Nur; Abdullatif, R Farzand; Sunardi, Sunardi; Bilalodin, Bilalodin; Arifin, A
International Journal of Renewable Energy Development Vol 9, No 2 (2020): July 2020
Publisher : Center of Biomass & Renewable Energy, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ijred.9.2.255-261

Abstract

The wave energy power generation-pendulum system (WEPG-PS) is a four-wheeled instrument designed to convert wave power into electric energy. The first wheel is connected to the pendulum by a double freewheel, the second and third are ordinary wheels, while the fourth is a converter component that is axially connected to the electric generator. This design used the Euler-Lagrange formalism and Runge-Kutta method to examine an ideal dimension and determine the numerical solution of the equation of motion related to the rotation speed of the wheels. The result showed that the WEPG-PS' converter system rotated properly when its mass, length, and moment of inertia are 10 kg, 2.0 m, and 0.25 kgm2, respectively. This is in addition to when the radius of the first, second, third, and fourth wheels are 0.5, 0.4, 0.2, and 0.01 m, with inertia values of 0.005, 0.004, 0.003, and 0.1 kgm2. The converter system has the ability to rotate the fourth wheel, which acts as the handle of an electric generator at an angular frequency of approximately 500 - 600 rad/s. The converter system is optimally rotated when driven by a minimum force of 5 N and maximum friction of 0.05. Therefore, the system is used to generate electricity at an amplitude of 0.3 - 0.61 m, 220 V with 50 Hz. Besides, the lower rotation speed and frequency of the energy converter of the WEPG-PS (300 rad/s) and induction generator (50 Hz) were able to generate electric power of 7.5 kW. 
Co-Authors - Sehah, - Abdullah Nur Aziz Aminuddin, Jamrud Arifin, A Aris Setiawan Bilalodin Bilalodin Eiji Kominama Farzand Abdullatif Fuzi Nurrahman Fauzi, Fuzi Nurrahman Hiroyuki Yokoi Nobutsuga Minami Nurhayati Nurhayati Pakhrur Razi Shojiro Takeyama Sunardi Sunardi Wahyu Tri Cahyanto Wahyu Widanarto, Wahyu Widiyani, Agustina Wihantoro Wihantoro