Results 21 to 30 of about 761,695 (308)

An Efficient Forward-Biased Si CMOS LED With High Optical Power Density and Nonlinear Optical-Power-Current Characteristic

IEEE Photonics Journal, 2019
A forward-biased silicon-based light-emitting device (Si-LED) was designed and fabricated by standard 0.18 μm complementary metal-oxide-semiconductor (CMOS) technology without any modification.
Jia Cong, Luhong Mao, Rong Xie, Sheng Xie, Weilian Guo   +4 more
doaj   +1 more source

The Synthesis, Crystal Structure, DFT Calculations and Optical Properties of Orcinolic Derivatives as OH⁻ Indicators

Crystals, 2022
The structures of 2-(3-hydroxy-5-methylphenoxy)-N-(4-nitrophenyl)acetamide), B1, and 2-(3-hydroxy-5-methylphenoxy)-N-(4-(trifluoromethyl)phenyl)acetamide, B2, are crystallized in the crystal symmetry of the monoclinic structure and in the space group of ...
Boontana Wannalerse, Paradee Kwanmuang, Piangkwan Jansukra, Bussaba Pinchaipat, Tanwawan Duangthongyou, Panitat Hasin, Apisit Songsasen, Kittipong Chainok, Songwut Suramitr   +8 more
doaj   +1 more source

Color Point Tuning for (Sr,Ca,Ba) Si2O2N2:Eu2+ for White Light LEDs [PDF]

, 2009
Color point tuning is an important challenge for improving white light LEDs. In this paper, the possibilities of color tuning with the efficient LED phosphor Sr1−x−y−zCaxBaySi2O2N2:Euz2+ (0 ≤ x, y ≤ 1; 0.005 ≤ z ≤ 0.16) are investigated.
Bachmann, Volker, Meijerink, Andries, Oeckler, Oliver, Ronda, Cees, Schnick, Wolfgang   +4 more
core   +1 more source

Synthesis and Photoluminescence Properties of Tunable Green-Orange Cerium-Doped Terbium-Lutetium Aluminum Garnet

International Journal of Electrochemical Science, 2015
Cerium-doped terbium-lutetium aluminum garnet ((TbxLu1-x)2.9Al5O12: 0.1Ce) were synthesized by solid state reaction method. The crystalline phase, morphology and photoluminescence properties were characterized by using X-ray diffraction (XRD ...
Jun Wang, Tao Han, Tianchun Lang, Mingjing Tu, Lingling Peng   +4 more
doaj   +1 more source

Political risks: the “red shift” in debt sustainability analysis [PDF]

Risk Management Magazine, 2020
Political stability and economic policy uncertainty can be key determinants of sovereign debt dynamics, and we show how they can be incorporated in debt sustainability analysis.
Andrea Consiglio, Stavros Zenios
doaj   +1 more source

Analysis of Cadmium Contamination in Lettuce (Lactuca sativa L.) Using Visible-Near Infrared Reflectance Spectroscopy

Sensors, 2023
In order to rapidly and accurately monitor cadmium contamination in lettuce and understand the growth conditions of lettuce under cadmium pollution, lettuce is used as the test material.
Lina Zhou, Leijinyu Zhou, Hongbo Wu, Lijuan Kong, Jinsheng Li, Jianlei Qiao, Limei Chen   +6 more
doaj   +1 more source

More complete discussion of the time-dependence of the non-static line element for the universe [PDF]

, 1930
In a previous article,(1) I have shown that a continuous transformation of matter into radiation, occurring throughout the universe, as postulated by the astrophysicists, would necessitate a nonstatic line element for the universe, and have shown that ...
Tolman, Richard C.
core   +1 more source

Cosmological Red-shift [PDF]

Nature, 1964
Hoyle1 has shown that for a steady-state universe consisting of uniformly distributed matter of density ρ a metric of the form: applies if it is assumed that a uniform creation of matter occurs.
openaire   +2 more sources

Gravitational red-shift and deflection of slow light [PDF]

, 2008
We explore the nature of the classical propagation of light through media with strong frequency-dependent dispersion in the presence of a gravitational field.
A. N. Jordan, J. B. Hartle, J. C. Howell, J. Dressel, L. D. Landau, L. M. Barkov, M. Born, M. Göckeler, P. W. Milonni, S. G. Rajeev   +9 more
core   +3 more sources

Cosmic Concordance and Quintessence [PDF]

, 2000
We present a comprehensive study of the observational constraints on spatially flat cosmological models containing a mixture of matter and quintessence --- a time varying, spatially inhomogeneous component of the energy density of the universe with ...
Affleck I., Barreiro T., Bartelmann M., Bertschinger E., Binetruy P., Blanton M., Bloomfield-Torres L. F., Bond J. R., Burles S., Burles S., Burles S., Croft R. A. C., Davis M., Evrard A. E., Fry J. N., Fukugita M., Hill C., Hill C., Hu W., Huey G., J. P. Ostriker, Leitch E. M., Limin Wang, Linde A., Malhotra S., McDonald P., Myers S. T., Oliveira-Costa A., Paul J. Steinhardt, Peacock J., R. R. Caldwell, Ratra B., Salaris M., Spergel D., Steinhardt P. J., Waga I., Weinberg D. H., Weiss N., Wetterich C.   +38 more
core   +2 more sources