Browse Items (67 total)
- Collection: Vol. 18, No. 6 2020
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TELKOMNIKA Telecommunication, Computing, Electronics and Control
Discrete wavelet transform recursive inverse algorithm using second-order estimation of the autocorrelation matrix
The recursive least squares (RLS) algorithm was introduced as an alternative to least mean square (LMS) algorithm with enhanced performance. Computational complexity and instability in updating the autocolleltion matrix are some of the drawbacks of…
TELKOMNIKA Telecommunication, Computing, Electronics and Control
Design and implementation of fast and highly precise water magnetizer
In the last decades, researchers have widely discussed the effects of
magnetized water on many biological and industrial aspects; many studies have also examined the effects of magnetization on water physical and chemical properties and shown a…
magnetized water on many biological and industrial aspects; many studies have also examined the effects of magnetization on water physical and chemical properties and shown a…
TELKOMNIKA Telecommunication, Computing, Electronics and Control
Medical remotely caring with COVID-19 virus infected people using optimized wireless arm tracing system
A human arm makes many functions that a robotic arm always programmed to make same functions. The human limbs motion can be captured using sensors that they will always copy hand movement. The rapid spread of the Coronavirus (COVID-19) virus and…
TELKOMNIKA Telecommunication, Computing, Electronics and Control
The detection of handguns from live-video in real-time based on deep learning
Many people have been killed indiscriminately by the use of handguns in
different countries. Terrorist acts, online fighting games and mentally
disturbed people are considered the common reasons for these crimes. A real-time handguns detection…
different countries. Terrorist acts, online fighting games and mentally
disturbed people are considered the common reasons for these crimes. A real-time handguns detection…
TELKOMNIKA Telecommunication, Computing, Electronics and Control
Improved anti-noise attack ability of image encryption algorithm using de-noising technique
Information security is considered as one of the important issues in the
information age used to preserve the secret information throughout transmissions in practical applications. With regard to image encryption, a lot of schemes related to…
information age used to preserve the secret information throughout transmissions in practical applications. With regard to image encryption, a lot of schemes related to…
TELKOMNIKA Telecommunication, Computing, Electronics and Control
Direct split-radix algorithm for fast computation of type-II discrete Hartley transform
In this paper, a novel split-radix algorithm for fast calculation the discrete Hartley transform of type-II (DHT-II) is intoduced. The algorithm is established through the decimation in time (DIT) approach, and implemented by splitting a length N of…
TELKOMNIKA Telecommunication, Computing, Electronics and Control
An improved swarm intelligence algorithms-based nonlinear fractional order-PID controller for a trajectory tracking of underwater vehicles
This paper presents a nonlinear fractional order proportional integral
derivative (NL-FOPID) for autonomous underwater vehicle (AUV) to solve the path tracking problem under the unknown disturbances (model uncertainty or external disturbances). The…
derivative (NL-FOPID) for autonomous underwater vehicle (AUV) to solve the path tracking problem under the unknown disturbances (model uncertainty or external disturbances). The…
TELKOMNIKA Telecommunication, Computing, Electronics and Control
Towards better performance: phase congruency based face recognition
Phase congruency is an edge detector and measurement of the significant feature in the image. It is a robust method against contrast and illumination variation. In this paper, two novel techniques are introduced for developing a low-cost human…
TELKOMNIKA Telecommunication, Computing, Electronics and Control
Study of red-emitting LaAsO4:Eu3+ phosphor for color
rendering index improvement of WLEDs with dual-layer remote phosphor geometry
The remote phosphor structure is often disadvantageous in color quality but in terms of optics it is more convenient when compared to other phosphor structures such as conformal or in-cup ones. From this disadvantage, there are many studies to…
TELKOMNIKA Telecommunication, Computing, Electronics and Control
The application of green YPO4:Ce3+,Tb3+ and red LiLaO2:Eu3+ layers to remote phosphor LED
Remote phosphor structure is commonly limited in color quality, but has greater luminous flux when comparing to structures with in-cup or conformal coating. From this dilemma, various researches with advance modifications have been proposed to…