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All Journal Journal of Mechanical Engineering Science and Technology Jurnal Studi Komunikasi
Jatimurti, Wikan
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Arts Humanities Energy Engineering Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mechanical Engineering Social Sciences

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Media and environment: how indonesia online news portal frames biodegradable issue? Yuliarti, Monika Sri; Jatimurti, Wikan
Jurnal Studi Komunikasi Vol. 3 No. 2 (2019)
Publisher : Faculty of Communications Science, Dr. Soetomo University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25139/jsk.v3i2.1586

Abstract

Environmental problems are still an important issue and cannot be resolved completely until now, even after the 1970s the United Nations established a world environmental day. Plastic waste is considered the most responsible for the problems of environmental damage today. Therefore, an innovation that comes from biodegradable material, with its biodegradable product is considered to be the answer to this environmental problem. This study examines how reporting on the environment is framed in online mass media, especially in relation to biodegradable material and biodegradable products. This is qualitative research, with the object of two Indonesian online news sites, namely www.detik.com and www.okezone.com. Data collection techniques used is document studies and data analysis techniques employed is Robert N. Entman's Framing analysis model which involves four elements, namely: define problems, diagnose causes, make moral judgment, and treatment recommendation. The findings of this study are that environmental issues have not dominated online media coverage, and the biodegradable issue has not been framed thoroughly by online media.
The Effect of Solution Treatment Temperature and Quenching Media Variation in Heat Treatment Process Cu-Zn-Al Shape Memory Alloys on Shape Memory Effect and Microstructures Jatimurti, Wikan; Gayatri, Monica; Ramadhani, Mavindra
Journal of Mechanical Engineering Science and Technology (JMEST) Vol 4, No 1 (2020)
Publisher : Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17977/um016v4i12020p061

Abstract

Shape memory alloys (SMAs) are metal alloys with a reversible ability to recover their shape at a certain temperature after being deformed. This ability referred to as Shape Memory Effect (SME). The application of SMAs such as Ni-Ti and Cu-Zn-Al alloys usually used on automotive, biomedical, etc. The commonly used SMA is Ni-Ti because of its superior SME properties than Cu-Zn-Al, even though the price is quite higher. The SME of Cu-Zn-Al might be improved by increasing the presence of the martensite phase in its microstructure by heat treatment. The heat treatment process given to Cu-21Zn-5Al alloy is a homogenizing, annealing, solution treatment process and quenched with brine solution and dry ice. The heat-treated alloys then undergo several examination trough hardness tests, X-Ray Diffraction, metallography, SME test, and Differential Scanning Calorimetry to determine the SME and microstructure of Cu-21Zn-5Al. From the test results, the specimen with temperature treatment solution of 850oC and quenched by brine solution had the highest SME value by 36.67%. All of the microstructure contained α, β, (martensite) and γ phases.
Co-Authors Gayatri, Monica Monika Sri Yuliarti, Monika Sri Ramadhani, Mavindra