Browse Items (67 total)
- Collection: Vol. 18, No. 3 2020
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TELKOMNIKA Telecommunication, Computing, Electronics and Control
A hybrid algorithm for wave-front corrections applied to satellite-to-ground laser communication
Laser communications hold accurate data rate for ground satellite links.
The laser beam is transmitted through the atmosphere. The clear-air turbulence induces a number of phase distortions that damage wave-front. Adaptive optics (AO) treats wave…
The laser beam is transmitted through the atmosphere. The clear-air turbulence induces a number of phase distortions that damage wave-front. Adaptive optics (AO) treats wave…
TELKOMNIKA Telecommunication, Computing, Electronics and Control
2D mapping using omni-directional mobile robot equipped with LiDAR
A room map in a robot environment is needed because it can facilitate
localization, automatic navigation, and also object searching. In addition,
when a room is difficult to reach, maps can provide information that is helpful to humans. In this…
localization, automatic navigation, and also object searching. In addition,
when a room is difficult to reach, maps can provide information that is helpful to humans. In this…
TELKOMNIKA Telecommunication, Computing, Electronics and Control
Design of freeform lens for WLEDs on the fishing boat
In this article, a free secondary lens is designed for an LED fishing/working lamp (LFWL), which is recommended for the purpose of taking the place of a traditional high-intensity discharge (HID) fishing lamp. To serve the lighting needs of fishing…
TELKOMNIKA Telecommunication, Computing, Electronics and Control
Green-emitting Gd2O2S:Tb3+ and red-emitting Y3Al5O12:Cr3+ phosphors: a suitable selection for enhancing color quality of remote phosphor structure
This article demonstrates green-emitting phosphor Gd2O2S:Tb3+ and
red-emitting phosphor Y3Al5O12:Cr3+ application in the triple-layer phosphor WLED to enhance optical performance. The arrangement of phosphor layers in the WLED is red phosphor…
red-emitting phosphor Y3Al5O12:Cr3+ application in the triple-layer phosphor WLED to enhance optical performance. The arrangement of phosphor layers in the WLED is red phosphor…
TELKOMNIKA Telecommunication, Computing, Electronics and Control
Insomnia analysis based on internet of things using electrocardiography and electromyography
Insomnia is a disorder to start, maintain, and wake up from sleep, has many sufferers in the world. For patients in remote locations who suffer from insomnia, which requires testing, the gold standard performed requires patients to take the time and…
TELKOMNIKA Telecommunication, Computing, Electronics and Control
Cleveree: an artificially intelligent web service for Jacob voice chatbot
Jacob is a voice chatbot that use Wit.ai to get the context of the question and give an answer based on that context. However, Jacob has no variation in answer and could not recognize the context well if it has not been learned previously by the…
TELKOMNIKA Telecommunication, Computing, Electronics and Control
IoT-based guppy fish farming monitoring and controlling system
Nowadays, monitoring of guppy fish farming is still done manually.
A monitoring and control system is needed to make it easier for guppy fish farmers. This system consists of a sensor module and monitoring module. Sensor module detects the value of…
A monitoring and control system is needed to make it easier for guppy fish farmers. This system consists of a sensor module and monitoring module. Sensor module detects the value of…
TELKOMNIKA Telecommunication, Computing, Electronics and Control
Novel dependencies of currents and voltages in power system steady state mode on regulable parameters of three-phase systems symmetrization
The unbalanced mode, negative/zero sequence, variation of real power are caused by the nonlinear or unbalanced loads increase the power transmission losses in distributing power systems and also harmful to the electric devices. Reactive power…
TELKOMNIKA Telecommunication, Computing, Electronics and Control
Smart parking management system using SSGA MQTT and real-time database
Smart parking system as a part of smart city development has been widely proposed with several research. In this research, proposed a system of parking management application that functions to monitor and control the location of parking slot that can…
TELKOMNIKA Telecommunication, Computing, Electronics and Control
Maximising system throughput in wireless powered sub-6 GHz and millimetre-wave 5G heterogeneous networks
Millimetre wave (mm-Wave) bands and sub-6 GHz are key technologies in solving the spectrum critical situation in the fifth generation (5G) wireless networks in achieving high throughput with low transmission power. This paper studies the performance…