Enhanced brightness and extraction efficiency of Nd:YAG rod lasers resulting in 180 W output power with M2 < 1.2

2002 ◽  
Author(s):  
M. Ostermeyer ◽  
G. Klemz ◽  
P. Kubina ◽  
R. Menzel
Keyword(s):  
Output Power ◽  
Extraction Efficiency

scholarly journals Microwave and Ultrasound Effect on Ammoniacal Leaching of Deep-Sea Nodules

Minerals ◽  
2018 ◽  
Vol 8 (8) ◽  
pp. 351
Author(s):  
Anna Knaislová ◽  
Hong Vu ◽  
Petr Dvořák
Keyword(s):  
Output Power ◽  
Deep Sea ◽  
Extraction Efficiency ◽  
Ammonium Thiosulfate ◽  
Copper Nickel ◽  
Amino Complexes ◽  
Ammoniacal Leaching ◽  
Reverse Precipitation ◽  
Metals Extraction ◽  
Ultrasound Effect

The influence of ultrasound and microwaves on extraction of copper, nickel, and cobalt from manganese deep-sea nodules by reductive ammoniacal leaching in the presence of ammonium thiosulfate as a reducing agent was studied. The ultrasonic ammoniacal leaching provides higher metals extraction, while the effect of microwaves on the metals extraction under the studied leaching conditions is insignificant. In general, increasing leaching temperature increases significantly extraction of the metals of interest. At high temperatures, extraction efficiencies of copper, nickel, and cobalt decrease over longer leaching duration as a result of decomposition of the metals amino-complexes and reverse precipitation of metals. However, during the ultrasonic leaching at a temperature of 85 °C, the extraction of nickel remains almost unchanged over longer leaching durations and does not follow the decreasing course, observed in the extraction of copper and cobalt. The finding suggests that nickel can be selectively extracted from the nodules by the ultrasonic leaching. The maximal extraction efficiency of copper, nickel, and cobalt was 83%, 71%, and 32%, respectively, when the reductive ultrasonic ammoniacal leaching was carried out at 85 °C for 90 min. In the presence of microwaves, the maximal extraction efficiency of copper, nickel, and cobalt was 67%, 48%, and 8%, respectively, when the reductive ultrasonic ammoniacal leaching was carried out at the output power of 60 W for 210 min.

Influence of gain module aspect ratio on output power and extraction efficiency

2012 ◽  
Vol 24 (5) ◽  
pp. 1033-1037
Author(s):  
张骁 Zhang Xiao ◽  
刘文广 Liu Wenguang
Keyword(s):  
Aspect Ratio ◽  
Output Power ◽  
Extraction Efficiency

Moth-Eye Light-Emitting Diodes

2004 ◽  
Vol 831 ◽  
Author(s):  
Hideki Kasugai ◽  
Yasuto Miyake ◽  
Akira Honshio ◽  
Takeshi Kawashima ◽  
Kazuyoshi Iida ◽  
...  
Keyword(s):  
Theoretical Analysis ◽  
Output Power ◽  
Blue Light ◽  
Light Emitting Diodes ◽  
Extraction Efficiency ◽  
Light Extraction ◽  
Light Extraction Efficiency ◽  
Light Emitting ◽  
Conventional Structure

ABSTRACTNitride-based blue-light-emitting diodes having a moth-eye structure were fabricated on the backside of a 6H-SiC substrate. The light extraction efficiency and the corresponding output power were increased by 3.8 times compared with those of an LED having the conventional structure. The results of theoretical analysis agree with these findings.

scholarly journals SILAR-Based Application of Various Nanopillars on GaN-Based LED to Enhance Light-Extraction Efficiency

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
S. C. Shei
Keyword(s):  
Output Power ◽  
Indium Tin Oxide ◽  
Extraction Efficiency ◽  
Light Output ◽  
Contact Layer ◽  
Light Extraction ◽  
Light Extraction Efficiency ◽  
Operating Voltage ◽  
Light Output Power ◽  
The Difference

We reported the various nanopillars on GaN-based LED to enhance light-extraction efficiency prepared by successive ionic layer adsorption and reaction method (SILAR). Indium tin oxide (ITO) with thickness of 1 μm as transparent contact layer was grown to improve the electrical characteristics of the LEDs, including series resistance and operating voltage. SILAR-deposition ZnO nanoparticles on SiO2were used as etching nanomasks. Multiple nanopillars were simultaneously formed on overall surfaces of ITO p- and n-GaN by ICP etching. The proposed GaN-based LEDs with nanopillars increase light output power by 7%–20.3% (at 20 mA) over that of regular GaN-based LEDs. The difference in light output power can be attributed to differences in materials and shapes of nanopillars, resulting in a reduction in Fresnel reflection by the roughened surface of GaN-based LEDs.

Caffeine supplementation for 4-day, followed by acute ingestion, did not impact triathlete output power after submaximal intensity exercise

2019 ◽  
Vol 18 (3) ◽  
pp. 118
Author(s):  
Anderson Pontes Morales ◽  
Felipe Sampaio-Jorge ◽  
Thiago Barth ◽  
Alessandra Alegre De Matos ◽  
Luiz Felipe Da Cruz Rangel ◽  
...  
Keyword(s):  
Blood Lactate ◽  
Output Power ◽  
Body Mass ◽  
Effect Size ◽  
Power Output ◽  
Anaerobic Power ◽  
Lactate Concentration ◽  
Wingate Test ◽  
Large Effect Size ◽  
Acute Ingestion

Introduction: The aim of this study was to test the hypothesis that caffeine supplementation (6 mg·kg-1 body mass) for 4-days, followed by acute intake, would impact five male triathletes output power after performed submaximal intensity exercise. Methods: This was a randomized, double-blind, placebo-controlled crossover study, placebo (4-day) - placebo (acute) PP, placebo (4-days) -caffeine (acute) PC, and caffeine (4-day) - caffeine (acute) CC. Participants abstained from dietary caffeine sources for 4 days and ingested capsules containing either placebo or caffeine (6 mg.kg-1 body mass day in one absorption). The acute trials the capsules containing placebo or caffeine (6 mg.kg-1 body mass day in one absorption) were ingested 60min before completing exercise in a treadmill for 40min (80% VO2max) and to perform the Wingate test. Results: Blood lactate was determined before, 60min after ingestion, and immediately after the exercise on the treadmill, the Wingate test, and after the recovery (10-min). CC and PC trials did not change the cardiopulmonary variables (P>0.05) and the anaerobic power variables (peak/mean power output and fatigue index) (P>0.05). The PC trial compared with PP promoted improvements in the curve power output in 2 sec by 31.19% (large effect-size d = 1.08; P<0.05) and 3 sec by 20% (large effect-size d = 1.19; P<0.05). A 10min recovery was not sufficient to reduce blood lactate concentration in the PC trial compared with PP (PC, 13.73±2.66 vs. PP, 10.26±1.60 mmol.L-1; P<0.05, respectively) (P<0.05). Conclusion: In conclusion, these results indicate that caffeine supplementation (6 mg·kg-1 body mass) for 4 days, followed by acute ingestion, did not impact the triathletes output power after performed submaximal intensity exercise. Nutritional interventions may help researchers and athletes to adapt strategies for manipulating caffeine use.Key-words: caffeine metabolism, Wingate test, blood lactate, performance.

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