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Safety and Health at Work Vol. 13 Issue 1 2022
Coronavirus Disease (COVID-19) Pandemic: The Psychological Well-Being in a Cohort of Workers of a Multinational Company (Original article)
Background: The aim of the present study was to evaluate the psychological well-being (PWB) during the coronavirus disease (COVID-19) pandemic in workers of a multinational company.
Methods: Employees (aged 18 years) were recruited from Latin…
Methods: Employees (aged 18 years) were recruited from Latin…
TELKOMNIKA Telecommunication, Computing, Electronics and Control
Green Ca2La2BO6.5:Pb2+ phosphor: an innovative solution in enhancing the color quality and luminous flux of WLEDs
Light-emitting diodes devices that embedded with multiple chips (multi-
chip white LEDs (MCW-LEDs)) are an advanced lighitng solution with
much potential for improvement in the lighting industry. However, to further
the applicacations and…
chip white LEDs (MCW-LEDs)) are an advanced lighitng solution with
much potential for improvement in the lighting industry. However, to further
the applicacations and…
TELKOMNIKA Telecommunication, Computing, Electronics and Control
Application of dual-layer phosphor geometries for enhancing the optical properties of white-light LEDs
This article compares the lumen output of two packages of two-remote
phosphor (RP). The first package is flat dual-remote phosphor (FDRPS).
The second package is concave dual-remote phosphor (CDRP). The dispersion qualities of the…
phosphor (RP). The first package is flat dual-remote phosphor (FDRPS).
The second package is concave dual-remote phosphor (CDRP). The dispersion qualities of the…
TELKOMNIKA Telecommunication, Computing, Electronics and Control
Surface coated red phosphors with silica nanoparticles and silica nanocomposites: performance modifications
Surface coverings using nanomaterials of silica nanoparticles and poly
(methyl methacrylate) – abbreviated “PMMA-silica nanomaterials” – are
introduced to the Y2O2S:Eu3+ phosphor through four distinct approaches. The objective is to enhance…
(methyl methacrylate) – abbreviated “PMMA-silica nanomaterials” – are
introduced to the Y2O2S:Eu3+ phosphor through four distinct approaches. The objective is to enhance…
TELKOMNIKA Telecommunication, Computing, Electronics and Control
Benefits of using TiO2 quantum dots in producing low-cost and high-quality white light-emitting diodes
Quantum dots (QDs) is considered as a potential material for the
improvement of light-emitting diodes (LEDs). However, different from the traditional phosphor materials, they have unique scattering and absorption properties affected by their several…
improvement of light-emitting diodes (LEDs). However, different from the traditional phosphor materials, they have unique scattering and absorption properties affected by their several…
TELKOMNIKA Telecommunication, Computing, Electronics and Control
Superior hue output as well as lumen for WLEDs with dual-sheet distant layouts of phosphor
Remote phosphor constructions usually have color quality drawbacks but are more luminous in terms of lumen, surpassing conformal phosphor or in-cup layouts of phosphor. From this disadvantage, there is a great number of studies carried out to boost…
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
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
Modified moth swarm algorithm for optimal economic load dispatch problem
In this study, optimal economic load dispatch problem (OELD) is resolved by a novel improved algorithm. The proposed modified moth swarm algorithm (MMSA), is developed by proposing two modifications on the classical moth swarm algorithm (MSA). The…
TELKOMNIKA Telecommunication, Computing, Electronics and Control
Lower and upper bound intercept probability analysis in amplifier-and-forward time switching relaying half-duplex with impact the eavesdropper
In this paper, we proposed and investigated the amplifier-and-forward (AF)
time switching relaying half-duplex with impact the eavesdropper. In this
system model, the source (S) and the destination (D) communicate with each
other via a helping of…
time switching relaying half-duplex with impact the eavesdropper. In this
system model, the source (S) and the destination (D) communicate with each
other via a helping of…