scholarly journals Effects of LED Light Color and Intensity on Feather Pecking and Fear Responses of Layer Breeders in Natural Mating Colony Cages

Animals ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 814 ◽  
Author(s):  
Haipeng Shi ◽  
Baoming Li ◽  
Qin Tong ◽  
Weichao Zheng ◽  
Dan Zeng ◽  
...  
Keyword(s):  
Light Emitting Diode ◽  
Low Light ◽  
Light Emitting ◽  
Led Light ◽  
Feather Pecking ◽  
Physiological Indicators ◽  
Light Intensities ◽  
Yellow Orange ◽  
Natural Mating ◽  
Light Color

Natural mating colony cages for layer breeders have become commonplace for layer breeders in China. However, feather pecking (FP) and cannibalism are prominent in this system. The objective of this study was to investigate the effects of four light-emitting diode (LED) light colors (white: WL, red: RL, yellow-orange: YO, blue-green: BG) with two light intensities for each color, on FP, plumage condition, cannibalism, fear, and stress. A total of 32 identical cages were used for the eight treatments (four replicates for each treatment). For both light intensities, hens in RL had a lowest frequency of severe FP, whereas hens in WL had the highest frequency of severe FP. Hens in RL and BG had better plumage conditions than in WL and YO. Compared with RL and BG treatments, hens treated with WL and YO had a significantly longer tonic immobility (TI) duration. Hens treated with RL had a higher concentration of 5-hydroxytryptamine (5-HT), a lower concentration of corticosterone (CORT), and a lower heterophil to lymphocyte ratio than WL and YO. Furthermore, RL could significantly reduce mortality from cannibalism. Overall, hens treated with RL and low light intensity showed a lower frequency of severe FP, less damaged plumage, were less fearful, had lower physiological indicators of stress, and had reduced mortality from cannibalism. Transforming the light color to red or dimming the light could be regarded as an effective method to reduce the risk of FP and alleviate the fear responses of layer breeders.

Battery Charge Affects the Stability of Light Intensity from Light-emitting Diode Light-curing Units

2017 ◽  
Vol 42 (5) ◽  
pp. 497-504 ◽  
Author(s):  
A Tongtaksin ◽  
C Leevailoj
Keyword(s):  
Light Intensity ◽  
Light Emitting Diode ◽  
Resin Composite ◽  
Bottom Surface ◽  
Light Emitting ◽  
Led Light ◽  
Battery Charge ◽  
Light Intensities ◽  
Light Curing ◽  
The Stability

SUMMARY This study investigated the influence of battery charge levels on the stability of light-emitting diode (LED) curing-light intensity by measuring the intensity from fully charged through fully discharged batteries. The microhardness of resin composites polymerized by the light-curing units at various battery charge levels was measured. The light intensities of seven fully charged battery LED light-curing units—1) LY-A180, 2) Bluephase, 3) Woodpecker, 4) Demi Plus, 5) Saab II, 6) Elipar S10, and 7) MiniLED—were measured with a radiometer (Kerr) after every 10 uses (20 seconds per use) until the battery was discharged. Ten 2-mm-thick cylindrical specimens of A3 shade nanofilled resin composite (PREMISE, Kerr) were prepared per LED light-curing unit group. Each specimen was irradiated by the fully charged light-curing unit for 20 seconds. The LED light-curing units were then used until the battery charge fell to 50%. Specimens were prepared again as described above. This was repeated again when the light-curing units' battery charge fell to 25% and when the light intensity had decreased to 400 mW/cm2. The top/bottom surface Knoop hardness ratios of the specimens were determined. The microhardness data were analyzed by one-way analysis of variance with Tukey test at a significance level of 0.05. The Pearson correlation coefficient was used to determine significant correlations between surface hardness and light intensity. We found that the light intensities of the Bluephase, Demi Plus, and Elipar S10 units were stable. The intensity of the MiniLED unit decreased slightly; however, it remained above 400 mW/cm2. In contrast, the intensities of the LY-A180, Woodpecker, and Saab II units decreased below 400 mW/cm2. There was also a significant decrease in the surface microhardnesses of the resin composite specimens treated with MiniLED, LY-A180, Woodpecker, and Saab II. In conclusion, the light intensity of several LED light-curing units decreased as the battery was discharged, with a coincident reduction in the units' ability to polymerize resin composite. Therefore, the intensity of an LED light-curing unit should be evaluated during the life of its battery charge to ensure that sufficient light intensity is being generated.

scholarly journals Design of a Secondary Freeform Lens of UV LED Mosquito-Trapping Lamp for Enhancing Trapping Efficiency

Crystals ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 335 ◽  
Author(s):  
Wei-Hsiung Tseng ◽  
Diana Juan ◽  
Wei-Cheng Hsiao ◽  
Cheng-Han Chan ◽  
Hsin-Yi Ma ◽  
...  
Keyword(s):  
Light Intensity ◽  
Intensity Distribution ◽  
Light Emitting Diode ◽  
Trapping Efficiency ◽  
Axially Symmetric ◽  
Light Intensity Distribution ◽  
Light Emitting ◽  
Led Light ◽  
Uv Led ◽  
Freeform Lens

In this study, our proposed ultraviolet light-emitting diode (UV LED) mosquito-trapping lamp is designed to control diseases brought by insects such as mosquitoes. In order to enable the device to efficiently catch mosquitoes in a wider area, a secondary freeform lens (SFL) is designed for UV LED. The lens is mounted on a 3 W UV LED light bar as a mosquito-trapping lamp of the new UV LED light bar module to achieve axially symmetric light intensity distribution. The special SFL is used to enhance the trapping capabilities of the mosquito-trapping lamp. The results show that when the secondary freeform surface lens is applied to the experimental outdoor UV LED mosquito-trapping lamp, the trapping range can be expanded to 100π·m2 and the captured mosquitoes increased by about 300%.

scholarly journals PERANCANGAN ALAT PENDETEKSI KELAYAKAN OLI PADA KENDARAAN SEPEDA MOTOR BERBASIS ARDUINO UNO ATMEGA328

SIGMA TEKNIKA ◽  
2019 ◽  
Vol 2 (2) ◽  
pp. 179
Author(s):  
Muhammad Iirsyam
Keyword(s):  
Light Emitting Diode ◽  
Motor Vehicles ◽  
Light Reflection ◽  
Oil Viscosity ◽  
Light Emitting ◽  
Led Light ◽  
Detection Tool ◽  
Arduino Uno ◽  
Resistance Value ◽  
Oil Color

 AbstrakPada kendaraan bermotor pelumasan adalah suatu hal yang sangat penting. Pelumasan berfungsi untuk melumasi komponen logam atau metal yang bergesekan dalam mesin. Untuk menjaga performa mesin kendaraan tetap prima maka kita harus cermat dalam memilih jenis oli yang akan digunakan menurut tingkat kekentalan oli yang dibutuhkan oleh kendaraan yang kita gunakan. Selain itu pemeriksaan dan pergantian oli secara berkala berperan penting dalam menjaga awetnya mesin kendaraan.Untuk membantu dalam pengecekan oli bagi para pemilik kendaran bermotor dalam hal ini sepeda motor dalam itu peneliti merancang sebuah alat pendeteksi kelayakan oli pada kendaraan sepeda motor. Perubahan nilai resistansi dari sensor IR (Infrared Resistor) setelah menerima pantulan cahaya dari LED (Light Emitting Diode) yang diletakkan diatas permukaan oli menyebabkan tegangan yang diterima Arduino Uno microcontroller ATmega328 membaca perubahan warna oli pada sebuah baki oli sepeda motor. Kata kunci : Pengecekan oli, Pantulan cahaya LED, Arduino Uno   AbstractLubrication in motor vehicles is important, lubrication is not only serves to lubricate metal or metal touching or friction in the machine. To maintain the performance of the vehicle's engine is prime, we must carefully select the type of oil to be used according to the oil viscosity level required by the vehicle we use. In addition, inspection and oil change periodically play an important role in maintaining the vehicle's crew.To assist in oil checking for motorised owners in this motorcycle in this case the author devised an oil feasibility detection tool on a motorcycle vehicle. Changes in resistance value from IR sensor (Infrared Resistor) after receiving light reflection from LED (Light Emitting Diode) that is placed above the oil surface causing the received voltage Arduino Uno Microcontroller ATmega328 Read the changes Oil color on a motorcycle oil tray. Keywords: Oil checking, LED light reflection, Arduino Uno

scholarly journals Effects of Light-Emitting Diodes on the Accumulation of Glucosinolates and Phenolic Compounds in Sprouting Canola (Brassica napus L.)

Foods ◽  
2019 ◽  
Vol 8 (2) ◽  
pp. 76 ◽  
Author(s):  
Chang Park ◽  
Nam Kim ◽  
Jong Park ◽  
Sook Lee ◽  
Jong-Won Lee ◽  
...  
Keyword(s):  
Brassica Napus ◽  
Phenolic Compounds ◽  
Light Emitting Diode ◽  
Red Light ◽  
Dry Weight ◽  
Total Phenolic ◽  
Brassica Napus L ◽  
Light Emitting ◽  
Led Light ◽  
Sprout Growth

In this study, we investigated optimal light conditions for enhancement of the growth and accumulation of glucosinolates and phenolics in the sprouts of canola (Brassica napus L.). We found that the shoot lengths and fresh weights of red light-irradiated sprouts were higher than those of sprouts exposed to white, blue, and blue + red light, whereas root length was not notably different among red, blue, white, and blue + red light treatments. The accumulations of total glucosinolates in plants irradiated with white, blue, and red lights were not significantly different (19.32 ± 0.13, 20.69 ± 0.05, and 20.65 ± 1.70 mg/g dry weight (wt.), respectively). However, sprouts exposed to blue + red light contained the lowest levels of total glucosinolates (17.08 ± 0.28 mg/g dry wt.). The accumulation of total phenolic compounds was the highest in plants irradiated with blue light (3.81 ± 0.08 mg/g dry wt.), 1.33 times higher than the lowest level in plants irradiated with red light (2.87 ± 0.05 mg/g dry wt.). These results demonstrate that red light-emitting diode (LED) light is suitable for sprout growth and that blue LED light is effective in increasing the accumulation of glucosinolates and phenolics in B. napus sprouts.

scholarly journals Smart Solar-Powered LED Outdoor Lighting System Based on the Energy Storage Level in Batteries

Buildings ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 119
Author(s):  
Suhil Kiwan ◽  
Anwar Abo Mosali ◽  
Adnan Al-Ghasem
Keyword(s):  
Light Emitting Diode ◽  
Lighting System ◽  
Energy Status ◽  
Sustainable Buildings ◽  
Light Emitting ◽  
Led Light ◽  
Smart Control ◽  
Solar Powered ◽  
Conventional Systems ◽  
New System

A novel smart solar-powered light emitting diode (LED) outdoor lighting system is designed, built, and tested. A newly designed controller, that continuously monitors the energy status in the battery and, accordingly, controls the level of illumination of the LED light to satisfy the lighting requirements and/or to keep the light “on” the longest time possible, has been developed. The use of such a reliable solar energy-driven lighting system, with maximum time when the light is “on”, will eliminate the sudden-death of light problem present in conventional photovoltaic (PV) outdoor lights and, therefore, will enhance the natural surveillance and feeling of safety in sustainable buildings and cities. Furthermore, the new smart control eliminates the overdischarge of the system battery and, thus, ensures a longer lifetime of the system battery. Experimental measurements on a system using a 30 W LED light showed that the operating hours of the new system reached 29.16 h (1750 min), while the operating hours for a similar conventional system were 20.86 h (1252 min). Thus, the new lighting system was demonstrated, securing more than 40% of operating hours than the conventional systems.

Sign in / Sign up

Export Citation Format

Share Document