Rifqi Ikhwanuddin

Imperial College London | Imperial · Dyson School of Design Engineering

Metal industrial waste containing 50-60% Zn is treated using the hydrothermal method. The purpose of this study was to learn the effect of leaching and precipitation processes on the extraction of Zn from metal waste precursors and to determine whether ZnO products can be formed. There are two main preparation processes carried out in this study, s...

Bata diproses dengan campuran tanah liat dan air kemudian dibakar pada temperatur dan durasi tertentu. Adapun mencampur tanah liat dengan bahan limbah atau sampah diduga dapat mengubah sifat produk bata, khususnya terhadap daya serap air dan kekuatan mekanis. Bahan sampah yang potensial dapat dijumpai mudah dari bahan periklanan (spanduk vinyl). Tu...

The regional election in Lampung province has finished. The events left the amount of ex-campaign props such as banner to become waste. The final landfills and the waste reuse system are still an unsolved issue in Lampung province. A study of materials composition is required to find potential reuse of the waste. One of the traditional products in...

Desain area perpustakaan idealnya menyesuaikan kebutuhan pengunjung terhadap fungsi ruang. Ketersediaan ruang khusus di perpustakaan menjadi aspek yang penting untuk mewujudkan suasana belajar kondusif. Perbaikan kondisi akustik pada umumnya terfokus pada peredaman tingkat bunyi ekuivalen tanpa melibatkan persepsi pengguna ruang perpustakaan. Metod...

Analisis rekognisi pengucap forensik sangat rutin diperlukan di Indonesia. Pengembangan sistem dari pendekatan fonetik-akustik menuju sistem rekognisi pengucap otomatis yang tidak bergantung teks menjadi sangat penting untuk dilakukan. Dalam pengujian dan pelatihan kinerjanya, sistem rekognisi pengucap otomatis memerlukan suatu basis data. Makalah...

Bricks are regarded as important material in building constructions. Basically, brick is processed by mixing clay and water then burnt under high temperature for a certain duration. Previous study in Indonesia shows that mixing local clay with additional materials could improve its characteristic, especially in terms of water absorption potentialit...

Acoustic environment of intensive care unit (ICU) is known to be noisy and stressful. The sounds from medical equipment and staffs' activity is found out to give the most contribution in the overall sound level inside the ICU. Many study has shown its negative effect for patients and staffs, both psychologically and physiologically. However, severa...

The aim of this work was to investigate the soundscape perception in campus library. Identification of perceptual dimension has been done using in-situ assessment with 15 semantic differential scales on a questionnaire to 60 college students to achieve appropriate study space. They were bachelor and master students at Institut Teknologi Bandung. Th...