Results 101 to 110 of about 2,177,698 (204)

Simulation of AlGaN-based DUV-LED with The Variation of Step Al-graded QWs Configuration

open access: yesScience Letters
Analysis of aluminum composition grading is presented to enhance the efficiency of AlGaN-based deep ultraviolet light emitting diodes (DUV-LEDs).  The optical performance of LEDs with varying quantum well (QW) thickness and aluminum composition grading were examined through drift-diffusion simulations.
Wan Nur Amierha Wan Ibrahim   +3 more
openaire   +1 more source

Nanostructuration par photolithographie DUV de matériaux organiques

open access: yes, 2010
L'objectif principal de ce travail de thèse a été de développer un montage de lithographie à 193 nm (Deep-UV, DUV), avec comme but d'obtenir des nanostructures de période l 00 nm sur des surfaces relativement importantes (cm2) dans différents matériaux ...
DIRANI, Ali, SOPPERA, Olivier
core   +1 more source

Verrechnungspreise zur Koordination und Erfolgsermittlung

open access: yes, 2007
Martini JT. Verrechnungspreise zur Koordination und Erfolgsermittlung. Beiträge zur betriebswirtschaftlichen Forschung. Vol 115. Wiesbaden: DUV; 2007.In Theorie und Praxis sind Verrechnungspreise seit langem ein wichtiges und aktuelles Thema.
Martini, Jan Thomas ; https://orcid.org/
core   +1 more source

Nanostructuration by DUV photolithography of organic materials

open access: yes, 2010
L'objectif principal de ce travail de thèse a été de développer un montage de lithographie à 193 nm (Deep-UV, DUV), avec comme but d'obtenir des nanostructures de période l 00 nm sur des surfaces relativement importantes (cm2) dans différents matériaux ...
Dirani, Ali
core  

The End of Import-Led Growth? North Korean Evidence [PDF]

open access: yes
In this paper, we investigate causal relationships among exports, imports, and economic growth in North Korea by using time series data for the period between 1964 and 2004.
Sumie Sato, Mototsugu Fukushige
core  

導光板LED檯燈

open access: yes, 2011
[[abstract]]以半導體發光二極體(LED)為光源的檯燈,其光源具有低 壓直流驅動、無頻閃、極低功耗、光線集中、環保、使用壽命長、 易於控制等諸多優點,LED是綠色照明理想的光源,與傳統的照 明工具相比,LED照明工具,特別是GaN基白光LED照明,在功 耗及壽命方面均有不可比擬的優越性。傳統白熾燈採用熱發光技 術,浪費了90%的能源,而發光二極體的效能轉換率卻非常 高。由於半導體照明具有節能、長壽命、免維護、環保等優點, 業內普遍認為,如同電晶體替代電子管一樣,半導體燈替代傳統 ...
李彥樺;張朝欽;莊政達;黃威銓;何宗泰;張耀輝;呂捷瑋
core  

Quantitative comparison of different mounting media for transmissive DUV imaging of label-free biological specimens. [PDF]

open access: yesBiomed Opt Express
Chen J   +10 more
europepmc   +1 more source

Simulation And Analysis Of Spectrum And Flux Of LED

open access: yes, 2012
[[abstract]]This thesis presents a compact test system to measure the spectrum and flux of unknown LED. Once we get these two parameters, we can reconstruct the LED model by using the optics simulation software TracePro to interactively verify the ...
Chen, Po-Chang
core  

Free form lens and heat sink design for LED illumination

open access: yes, 2011
[[abstract]]The aim of this thesis is to analize the light field radiated from the LED collimator based on the free form secondary optics. It also discusses the thermal distribution cased by different type of heat sink design.
Chen-Bo Yan
core  

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