Long Time Operation of Composite Ceramic Nd:YAG/Cr:YAG Micro-chip Lasers for Ignition

2015 ◽  
Author(s):  
Masaki Tsunekane ◽  
Takunori Taira
Keyword(s):  
Composite Ceramic ◽  
Time Operation ◽  
Long Time

A New Prediction Model on the Luminance of OLEDs Subjected to Different Reverse Biases for Alleviating Degradation in AMOLED Displays

2014 ◽  
Author(s):  
Paul C.-P. Chao ◽  
Yen-Ping Hsu ◽  
Yung-Hua Kao ◽  
Kuei-Yu Lee
Keyword(s):  
Reverse Bias ◽  
High Efficiency ◽  
Life Time ◽  
Density Currents ◽  
High Brightness ◽  
Light Emitting ◽  
Wide Viewing Angle ◽  
Time Operation ◽  
Long Time ◽  
History Of

Organic light-emitting diodes (OLEDs) have drawn much attention in areas of displays and varied illumination devices due to multiple advantages, such as high brightness, high efficiency, wide viewing angle, and simple structure. However, the long-time degradation of OLED emission is a serious drawback. This degradation was investigated by past works, which pointed out that the degradation was induced by high-density currents through OLED component under the long-time operation [1][2]. Proposed by a past work [3], different reverse biases was imposed on OLED components in display frames to alleviate the long-time degradation on OLEDs. Most recently, along with the reverse bias, new pixel circuits [4][5] for AMOLED displays are designed to alleviate OLED degradation, thus successfully extending OLED life time. However, since emission luminances in different frame times during AMOLED displaying differs significantly for displaying varied images, the OLED degradation evolves in a highly unpredictable fashion. In this study, based on valid theories, the voltage across the OLED is first used as indicator for OLED degradation. Then the relation between the level of OLED degradation, in terms of OLED’s cross voltage, and the history of imposing reverse biases are precisely modeled. With the model, the degradation of the OLED under reverse bias to extend lifetime can be successfully predicted. Based on this model, engineers can then optimize the applied reverse bias on OLEDs to maximize the OLED lifetime for varied display requirement.

scholarly journals Partial nitritation treating nitrogen in old landfill leachate

2016 ◽  
Vol 19 (4) ◽  
pp. 39-49
Author(s):  
Nhat The Phan ◽  
Van Thi Thanh Truong ◽  
Son Thanh Le ◽  
Biec Nhu Ha ◽  
Dan Phuoc Nguyen
Keyword(s):  
Landfill Leachate ◽  
Retention Time ◽  
Sequencing Batch Reactor ◽  
Hydraulic Retention Time ◽  
Batch Reactor ◽  
Partial Nitritation ◽  
Time Operation ◽  
Nitrite Oxidizing Bacteria ◽  
Long Time ◽  
H 30

In this study, a lab-scale Partial Nitritation Sequencing Batch Reactor (PNSBR) was implemented for treating high-ammonium old landfill leachate to yield an appropriate NO2—N/ NH4+-N ratio from 1/1 to 1.32/1 mixture as a pretreatment for subsequent Anammox. The objective of this study was to determine the optimal hydraulic retention time (HRT) at different influent ammonia concentrations for 210 days. The experimental results showed that with the influent ammonia concentrations of 500, 1000, 1500 and 2000 mg/L, HRT is 12 h, 21 h, 30 h and 48 h, respectively. The range of free ammonia (FA) concentration from 17 to 44 mg/L completely inhibited nitrite oxidizing bacteria (NOB) for long time operation. The COD removal efficiency was very low (6±2) %.

The Effects of Microstructural Variations on Stress-Corrosion Cracking Susceptibility of Ti-8Al-1Mo-1V Alloy on Marinized Gas Turbines

1967 ◽  
Author(s):  
W. P. Danesi ◽  
R. A. Sprague ◽  
M. J. Donachie
Keyword(s):  
Titanium Alloys ◽  
Stress Corrosion ◽  
High Temperatures ◽  
Stress Corrosion Cracking ◽  
Gas Turbines ◽  
Effective Means ◽  
Corrosion Cracking ◽  
Corrosion Testing ◽  
Time Operation ◽  
Long Time

Salt can cause titanium alloys to crack, and if long-time operation of titanium hardwares in salt atmospheres is expected, effective means must be found to eliminate or control this tendency. The authors describe in detail their stress-corrosion testing of titanium alloys, and the results are plotted in a number of tables. Figures show stress-versus-temperature charts at different high temperatures, and the microstructure of the alloy after testing is illustrated. The results of the tests are evaluated and a brief summary is given.

The Integrated Aging Management System Applied to Nuclear Power Plants in Korea

2013 ◽  
Author(s):  
Se-Youl Won ◽  
Kyeong-Soo Lee ◽  
Jae-Gon Lee
Keyword(s):  
Management System ◽  
Nuclear Power ◽  
Power Plants ◽  
Nuclear Power Plants ◽  
Operating Experience ◽  
Evaluation Report ◽  
Time Operation ◽  
Standard Guideline ◽  
Periodic Safety ◽  
Long Time

According to Post Fukushima action items in Korea, KHNP has established the integrated aging management system to reinforce aging management of system, structures, and components (SSCs) effectively for seven operating units, which are in service for more than twenty years, and for Kori Unit 1 and Wolsung Unit 1, which are subject to continued operation (CO) based on NUREG-1801 GALL report. KHNP’s integrated aging management programs (AMPs) focus on the establishment of aging management system for long-lived operation of nuclear power plants in Korea. The integrated aging management system consists of the integrated AMP standard guideline, operating guideline for each plant, individual AMPs of each plant, and AMP Data Base (DB) system including implementation results, basic DB information related to facilities operating in NPPs, and operating information such as operating experience and evaluation report. The integrated aging management system is importantly utilized for Periodic Safety Review (PSR) and the renewal of CO. Therefore, it will be largely contributed to keep NPPs the level of safety for long time operation through the effective aging management.

Electrochemical noise analysis of a PEM fuel cell stack under long-time operation: noise signature in the frequency domain

2020 ◽  
Vol 24 (11-12) ◽  
pp. 3059-3071 ◽  
Author(s):  
S. Martemianov ◽  
A. Thomas ◽  
N. Adiutantov ◽  
E. Denisov ◽  
Yu Evdokimov ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Frequency Domain ◽  
Electrochemical Noise ◽  
Noise Analysis ◽  
Pem Fuel Cell ◽  
Fuel Cell Stack ◽  
Time Operation ◽  
Long Time ◽  
Noise Signature

scholarly journals Analysis of long-time operation of micro-cogeneration unit with fuel cell

2015 ◽  
Vol 92 ◽  
pp. 02061 ◽  
Author(s):  
Marek Patsch ◽  
Alexander Čaja
Keyword(s):  
Fuel Cell ◽  
Time Operation ◽  
Long Time

Long-time operation of high breaking capacity fuses

1993 ◽  
Vol 140 (4) ◽  
pp. 331
Author(s):  
D.A. Beaujean ◽  
P.G. Newbery ◽  
M.G. Jayne
Keyword(s):  
Time Operation ◽  
Long Time
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