نتایج جستجو برای: barrier efficiency

تعداد نتایج: 474823  

2012
Yingchao Zhang Huijuan Liu Haijiao Zhang Xiang Zhao

In this paper, a novel doubly excited brushless generator (DEBG) with outer radial laminated magnetic barrier rotor (RLMB-rotor) for wind power application was designed and analyzed. The DEBG has 10 rotor pole numbers with outer rotor. Its performance was investigated using the 2D transient finite element method. The magnetic fields, torque capability, end winding voltage characteristics, radia...

Journal: :Genes & development 2009
Ana Banito Sheikh T Rashid Juan Carlos Acosta SiDe Li Carlos F Pereira Imbisaat Geti Sandra Pinho Jose C Silva Veronique Azuara Martin Walsh Ludovic Vallier Jesús Gil

Somatic cells can be reprogrammed into induced pluripotent stem (iPS) cells by overexpressing combinations of factors such as Oct4, Sox2, Klf4, and c-Myc. Reprogramming is slow and stochastic, suggesting the existence of barriers limiting its efficiency. Here we identify senescence as one such barrier. Expression of the four reprogramming factors triggers senescence by up-regulating p53, p16(IN...

2007
AMIT KUMAR P. K. Bhatnagar

Studies light emitting devices based on MEHPPV and then performed electrical characterization over these. It has been found that light emitting efficiency of basic PLED viz. ITO/ MEHPPV/AI can be improved if added a buffer layer of Lif in between polymer and Al. This increased efficiency can be attributed to the lowering of potential barrier at AI cathode due to the presence of LiF buffer layer...

Journal: :Optics express 2014
Zi-Hui Zhang Wei Liu Swee Tiam Tan Zhengang Ju Yun Ji Zabu Kyaw Xueliang Zhang Namig Hasanov Binbin Zhu Shunpeng Lu Yiping Zhang Xiao Wei Sun Hilmi Volkan Demir

Electron overflow limits the quantum efficiency of InGaN/GaN light-emitting diodes. InGaN electron cooler (EC) can be inserted before growing InGaN/GaN multiple quantum wells (MQWs) to reduce electron overflow. However, detailed mechanisms of how the InGaN EC contributes to the efficiency improvement have remained unclear so far. In this work, we theoretically propose and experimentally demonst...

Journal: :Optics express 2014
Sabina Hatch Jiang Wu Kimberly Sablon Phu Lam Mingchu Tang Qi Jiang Huiyun Liu

The hybrid structure of GaAs/GaAsSb quantum well (QW)/InAs quantum dots solar cells (QDSCs) is analyzed using power-dependent and temperature-dependent photoluminescence. We demonstrate that placing the GaAsSb QW beneath the QDs forms type-II characteristics that initiate at 12% Sb composition. Current density-voltage measurements demonstrate a decrease in power efficiency with increasing Sb co...

2014

This study analyzes a barrier of developing Exchange named lack of information related to performance of organization. This paper proposes a combined approach to decision making that Examine companies financial performance and offers an optimal way to solve the problem of ranking and efficiency survey. FAHP-TOPSIS approach is used to rating companies and FAHP-DEA approach is used for efficiency...

2001
Chengfeng Qiu Haiying Chen Man Wong

The dependence of the current and power efficiencies of bi-layer organic light-emitting diodes (OLEDs) on the thickness of the constituent organic layers is reported. The thickness of the electron and hole transport layers was simultaneously varied to determine the optimal configuration for power efficiency. It was verified that the inclusion of a suitable electrode buffer layer reduced the eff...

2009
Susana Cardoso Zongzhi Zhang Haohua Li Ricardo Ferreira Paulo P. Freitas Peng Wei José C. Soares Etienne Snoeck Xavier Batlle

In this paper, a remote O2 ion source is used for the formation of nano-oxide layers. The oxidation efficiency was measured in CoFe-oxide films, and a decrease of the oxide layer with the pan angle and the oxidation pressure is observed. For the same oxidation pressure, the oxidation efficiency depends on the O2 content in the Ar–O2 plasma. These results were applied in optimizing the fabricati...

2012
W.H.P. Pernice C. Schuck O. Minaeva M. Li G.N. Goltsman A.V. Sergienko H.X. Tang

Ultrafast, high-efficiency single-photon detectors are among the most sought-after elements in modern quantum optics and quantum communication. However, imperfect modal matching and finite photon absorption rates have usually limited their maximum attainable detection efficiency. Here we demonstrate superconducting nanowire detectors atop nanophotonic waveguides, which enable a drastic increase...

2005
Barry Williams

This study examines the factors that determine difference in efficiency of foreign bank in the host market (Australia). The impact of home market, host market and parent bank characteristics are considered within the frameworks offered by comparative advantage and new trade theories. Parametric distance functions are used to estimate the efficiency of foreign banks in Australia, and the robustn...

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