12 articles in this issue
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Hisham A. Maddah
The solar still is an emerging water distillation technology gaining popularity among the scientific community. Achieving a high throughput and/or performance in solar stills remains an unresolved challenge. In this study, the feasibility of utilizing sol... see more
Iwan Prasetiyo,Elsa Nalita Wongso,Joko Sarwono
Sub-wavelength sound absorbers are attractive for dealing with noise control at low-frequency (long-wavelength) sounds. To be efficient in absorbing the sound energy, resonator based absorbers are preferable over fibrous porous ones. In this paper, a coil... see more
Andojo Wurjanto,Julfikhsan Ahmad Mukhti,Shinta Ayuningtyas
Semarang city has been experiencing coastal flooding as a major problem. The flooding is inevitable due to the declining groundwater level as an impact of population growth and groundwater exploitation. The Indonesian Ministry of Public Works and Housing ... see more
Jeffrey Onuoma Oseh,Muhammad Noorul Anam,Adams Rasyid Sidiqi
One of the basic functions of drilling fluids is to transport drilled cuttings to the surface. Bentonite with low solids content is preferred in carrying out this task. However, a low amount of bentonite in the drilling mud is incapable of effective cutti... see more
Mona Berlian Sari,Rahadi Wirawan,Abdul Waris,Hong Joo Kim,Mitra Djamal
A simple void detection system for concrete was successfully developed using high-penetration gamma rays with Compton scattering. This research attempted to identify a void in the subsurface of a concrete volume that could not be accessed from any of the ... see more
Mohammed Shaker Mahmood,Ali Akhtarpour,Ameer Abdulridha Ajmi Alali
Installing vertical sand drains is a traditional dam foundation consolidation solution that is economical and provides good drainage efficiency. Vertical sand drains can shorten the path of water flow inside the soil and speeds up soil consolidation. This... see more
Rena Misliniyati,Andhika Sahadewa,Hendriyawan Hendriyawan,Masyhur Irsyam
Seismic site response analysis is used to estimate the response of soil deposits during seismic loading at any depth of interest and to interpret time histories as well as response spectra. This type of analysis involves many parameters that can affect th... see more
Yuantao Sun,Kaige Chen,Qing Zhang,Xianrong Qin,Jianjie Zhang
Industrial brakes pose the dilemma of weighing brake capability against brake impact since the brake torque cannot be adjusted. On the one hand, the brake torque may be insufficient to stop the movement within a limited distance or parking position. On th... see more
Prihati Sih Nugraheni,Alexander H. Soeriyadi,Ustadi Ustadi,Wahyudi Budi Sediawan,Wiratni Budhijanto
Chitosan is known as an antibacterial agent. The effective surface area ratio of chitosan can be increased by modification into nanoparticles. Nano-chitosan can be prepared with several simple methods, i.e. precipitation, ionic gelation, or the polyelectr... see more