Fundamental Limitations of Wide-Bandgap Semiconductors for Light-Emitting Diodes
Sign Up to like & getrecommendations! Published in 2018 at "ACS energy letters"
DOI: 10.1021/acsenergylett.8b00002
Abstract: Fundamental limitations of wide-bandgap semiconductor devices are caused by systematic trends of the electron and hole effective mass, dopant ionization energy, and carrier drift mobility as the semiconductor’s bandgap energy increases. We show that when… read more here.
Keywords: bandgap semiconductors; bandgap; wide bandgap; light emitting ... See more keywords
Perspective: Fundamental Limitations of the Randomized Controlled Trial Method in Nutritional Research: The Example of Probiotics
Sign Up to like & getrecommendations! Published in 2018 at "Advances in Nutrition"
DOI: 10.1093/advances/nmy046
Abstract: Abstract Studies on the relation between health and nutrition are often inconclusive. There are concerns about the validity of many research findings, and methods that can deliver high-quality evidence—such as the randomized controlled trial (RCT)… read more here.
Keywords: research; randomized controlled; method; controlled trial ... See more keywords
Fundamental Limitations on the Control of Lossless Systems
Sign Up to like & getrecommendations! Published in 2022 at "IEEE Control Systems Letters"
DOI: 10.1109/lcsys.2022.3185928
Abstract: In this letter we derive fundamental limitations on the levels of $H_{2}$ and $H_{\infty {}}$ performance that can be achieved when controlling lossless systems. The results are applied to the swing equation power system model,… read more here.
Keywords: fundamental limitations; inline formula; control; tex math ... See more keywords
Erratum to “Fundamental Limitations for Antenna Radiation Efficiency” [Aug 18 3894-3901]
Sign Up to like & getrecommendations! Published in 2019 at "IEEE Transactions on Antennas and Propagation"
DOI: 10.1109/tap.2019.2925274
Abstract: Recently, a fundamental limit for antenna radiation efficiency was proposed in [1] . Although valid for most antenna applications, a clarification is needed with regard to the fundamental limit expressed by [1 eqs. (14) and… read more here.
Keywords: radiation efficiency; fundamental limitations; antenna radiation; erratum fundamental ... See more keywords
On the Fundamental Limitations of Ultra-Wideband Antennas
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DOI: 10.1134/s1064226919030185
Abstract: An electrodynamic limitation on the characteristics of antennas with a semi-infinite range as the limiting case of ultra-wideband (UWB) antennas is found. This limitation relates the directivity, the input reflection coefficient, the lowest operating frequency,… read more here.
Keywords: operating frequency; fundamental limitations; wideband antennas; ultra wideband ... See more keywords
Fundamental Limitations of the Decay of Generalized Energy in Controlled (Discrete–Time) Nonlinear Systems Subject to State and Input Constraints
Sign Up to like & getrecommendations! Published in 2019 at "International Journal of Applied Mathematics and Computer Science"
DOI: 10.2478/amcs-2019-0046
Abstract: Abstract This paper is devoted to the analysis of fundamental limitations regarding closed-loop control performance of discrete-time nonlinear systems subject to hard constraints (which are nonlinear in state and manipulated input variables). The control performance… read more here.
Keywords: discrete time; energy; time nonlinear; generalized energy ... See more keywords