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Nowadays, diving is done for a variety of purposes. One type of diving activity is scuba diving. In the process, time and scuba diving area are limited by the availability of gas for breathing. This research focused on the design of single passenger underwater vehicle frame. Frame is a major component of the underwater vehicle functioning as a holder of the load and a place to put all the components...
This paper discusses an early warning system of wireless electronic information board based on frequency modulation (FM) radio to display the tsunami disaster risk visually. The system will be implemented in Cilacap District located on the confluence of two major plates. The display of proposed system is designed in multicolor using dot matrix panel P10 which has 32 × 16 pixels resolution. To be implementable...
The objectives of this project are to determine the behaviour to withstand a load that is gradually increased in one position such as standing on one leg and finding the methodology in conducting this experiment. The observation is mainly focused on the UHMWPE acetabular cup. The prosthesis was made by the assembly of Titanium grade-2 femoral stem, SS316L femoral ball, and UHMWPE acetabular cup. The...
This paper presents the development of an automatic pointing system for very small aperture terminal (VSAT) antenna. The system which uses AVR microcontroller as a main controller unit (MCU) is featured with non-horizontal alignment autocorrect. User interface is implemented using android smartphone connected wirelessly to the MCU using bluetooth module. The android smartphone also reads the latitude...
Laser is one of the light sources that transmits wavelength with frequency, phase, and polarization parameters. The response of each dielectric material to light created nonlinear in strong electromagnetic field. Nonlinearity occurs within the optical fiber with high intensity of light at the core with long span. The focus of this paper was to reduce the behavior of nonlinearity SPM (Self Phase Modulation)...
This paper presents the experimental study on small scale frequency-modulated continuous-wave (FMCW) synthetic aperture radar (SAR). The FMCW SAR system which is intended for unmanned aerial vehicle (UAV) payload uses 25–35MHz chirp signal generated using Direct Digital Synthesizer (DDS) which is transmitted at L-band frequency of 1.27GHz generated by voltage controlled oscillator (VCO). The choice...
The social media has Immense and popularity among all the services today. Data from SNS (Social Network Service) can be used for a lot of objectives such as prediction or sentiment analysis. Twitter is a SNS that has a huge data with user posting, with this significant amount of data, it has the potential of research related to text mining and could be subjected to sentiment analysis. But handling...
One type of robots that is interesting to develop is climbing robot. In order to create a robot that can move vertically, observation and data gathering on caterpillar's walking movement are needed. FEA simulation was conducted to attain stress distribution pattern of caterpillar's legs. A simulation was conducted to the climbing robot design to get the stress distribution pattern of each of its legs...
This paper deals with the design, manufacture and application of NC machine for cutting 2D intricate path of plane styrofoam. The cutter uses nickel wire heated by DC electric current. The X and Y axis is moved using open loop controlled stepper motor. The path that is cut is first was taken from picture, than changed the captured picture into line graph, and then programming the machine to follow...
Determination of optimal cutting parameters is important in the CO2 laser cutting process to obtain good cutting result. In this experiment, agel leaf fiber/unsaturated polyester (ALF/UP) are being used as test specimen. Agel leaf fiber usage as composite reinforcement is in order to fulfill sustainability issue. The purpose of this study is to find the material removal rate (MRR) of laser cutting...
This paper deals with the study on equivalent circuit of wideband bandpass filter (BPF) constructed using groundplane windowed split ring resonator (SRR). The study also covers realization and characterization of wideband BPF as well as its result comparison. The proposed wideband BPF is composed of 3 cascaded groundplane windowed SRR connected with microstrip lines. The equivalent circuit comprises...
This paper discuss about the investigation of 150kV capacitor voltage transformer (CVT) breakdown which is occurred simultaneously after capacitor bank disconnecting process. Analysis is performed referring to the last routine maintenance and digital fault recorder (DFR) data. Based on the analysis of both data and transient simulation analysis from the model created to represent the condition during...
In the era of the development of mobile technology, direct communication becomes a rare thing between humans to their families, causing the spatial communication between families, be it close family, distant family, or extended family. This can lead to familial relationships disappear, so that the grandchildren do not know their family tree properly. The “Geni.com” app provides a feature to record...
Dynamic Compression Plate (DCP) Is the most popular type of implant plate that facilitate compressing the fracture bone during implantation. However, the price of DCP is still expensive according to developing contries people. The price of DCP mostly related to its manufacturing that involved many machining processes. The proposed solution offered in this study was to change DCP manufacturing process...
University Course Timetabling Problem (UCTP) is common problem on high school and university. This problem is already solved by numerous method such as genetic algorithm, reinforcement learning algorithm, ant colony algorithm, or combination between them. Although the algorithms solved the timetabling problem, the previous researches limited discuss the pseudocode implementation only. This research...
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