Browse Items (27 total)
- Collection: Vol. 20, No. 5 2022
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TELKOMNIKA Telecommunication, Computing, Electronics and Control
High-speed multi-channel long-haul coherent optical transmission system
In this work, high-speed transmission over the long-haul optical channel
using orthogonal frequency division multiplexing (OFDM) was investigated. Furthermore, we recommend mixing polarization division multiplexing (PDM) with coherent OFDM (CO-OFDM)…
using orthogonal frequency division multiplexing (OFDM) was investigated. Furthermore, we recommend mixing polarization division multiplexing (PDM) with coherent OFDM (CO-OFDM)…
TELKOMNIKA Telecommunication, Computing, Electronics and Control
A method for semantic-based image retrieval using hierarchical clustering tree and graph
Semantic extraction for images is an urgent problem and is applied in many different semantic retrieval systems. In this paper, a semantic-based image retrieval (SBIR) system is proposed based on the combination of growth partitioning tree (GP-Tree),…
TELKOMNIKA Telecommunication, Computing, Electronics and Control
Clutter reduction technique based on clutter model for automatic target classification in forward scatter radar
Classification becomes one of the important elements in the forward scatter radar (FSR) micro-sensors network. This classification performance is dependent on the target’s profile behaviour and the network’s surrounding; and one of the factors that…
TELKOMNIKA Telecommunication, Computing, Electronics and Control
Study the effect of nickel and aluminium doped ZnO photoanode in DSSC
Dye sensitized solar cells (DSSC) is one of the promising candidates which are efficient, low-cost, and clean hybrid molecular solar cell devices. Zinc oxide (ZnO) has been widely used as the phoanode in DSSC due to its excellent charge conduction…
TELKOMNIKA Telecommunication, Computing, Electronics and Control
Optimization of light source wavelength for ammonia detection in water
Optimization of light source wavelength for ammonia detection in surface water is presented in this work. For the ammonia detection, the surface water sample is mixed with sodium chloride and nessler reagent, whereas the sensor head consists of…
TELKOMNIKA Telecommunication, Computing, Electronics and Control
Using triple-layer remote phosphor structures LaVO4:Eu3+ and ZnS:Cu,Sn to improve the chromatic uniformity and luminous quality of WLEDs
This research paper investigates the novel triple remote phosphor layer for improving the remote phosphor’s angular chroma uniformity (ACU) of down-light lamps by using remote micro-patterned phosphor layers (RMPP). In addition, introducing the…
TELKOMNIKA Telecommunication, Computing, Electronics and Control
Chroma consistency and luminous efficacy for a WLED using remote phosphor configuration with a tri-layer design
The light quality of white-light-emitting diodes (WLEDs), an essential
element for the improvement of WLEDs performance, can now be estimated by the angular color uniformity (ACU). In this study, a single
micro-patterned layer is used to compare…
element for the improvement of WLEDs performance, can now be estimated by the angular color uniformity (ACU). In this study, a single
micro-patterned layer is used to compare…
TELKOMNIKA Telecommunication, Computing, Electronics and Control
A study of redesigning food delivery application in Thailand
User interface (UI) and user experience (UX) design is fundamental to the stickiness of any application. Food delivery is no exception. With the food delivery business sector on the rise during the coronavirus disease 2019 (COVID-19) pandemic, it is…
TELKOMNIKA Telecommunication, Computing, Electronics and Control
E-CityFarm: sustainable small-scale food production integrated fish and crop cultivation
E-CityFarm is an electronic system that can control the parameters needed to grow fish and plants integratedly. It can control temperature, water acidity, and utilizing the neural network method able to count the number and length of fishes also…
TELKOMNIKA Telecommunication, Computing, Electronics and Control
Performance of electronic nose based on gas sensor-partition column for synthetic flavor classification
Electronic nose (e-nose) has been developed and implemented in a wide
area, included in food industries. This study was conducted to investigate the
performance of an e-nose that utilizes a packed gas chromatography column
and a gas sensor for…
area, included in food industries. This study was conducted to investigate the
performance of an e-nose that utilizes a packed gas chromatography column
and a gas sensor for…