Detection of THz radiation by a Field Effect Transistor InGaAs/InAlAs transistor was investigated at 4.2 K as a function of the magnetic field and gate voltage. We observed oscillations of the photovoltaic signal analogous to Shubnikov-de Haas oscillations, as well as their strong enhancement at the cyclotron resonance conditions. The results are successfully quantitatively described within the...

We recently determined the values of intrinsic spin-orbit (SO) parameters for In0.52Al0.48As/In0.53Ga0.47As(10 nm)/In0.52Al0.48As (InGaAs/InAlAs) quantum wells (QW), lattice-matched to (001) InP, from the weak localization/antilocalization analysis of the low-temperature magneto-conductivity measurements [1]. We have then studied the subband energy spectra for the InGaAs/InAlAs double QW system...

In this study, two analytical methods were evaluated to determine haloacetic acids (HAAs) in drinking water samples. Direct aqueous injection (DAI) and solid phase extraction (SPE) determination was performed by liquid chromatography tandem mass spectrometry (LC-MS/MS) with a hydrophilic interaction (HILIC) column. Limits of quantification (LOQ) between 10 500 µg L-1 DAI and, considering 125-fo...

?? Acknowledgement: Travel for Timothy C. Haas was supported by a SANParks Visiting Scholar grant. keywords: animal movement modeling, stochastic movement simulator, individual based models

Original paper: John C. Dencker, Sophie Bacq, Marc Gruber, and Melvin Haas, Reconceptualizing necessity entrepreneurship: A contextualized framework of entrepreneurial processes under the condition...

Heterocyclic aromatic amines (HAAs) are animal carcinogens and suspected human carcinogens which are formed in cooked foods at the low parts per billion level. HAAs in cooked meats were purified by either immunoaffinity chromatography or solid phase tandem extraction, which allowed for the simultaneous analysis of 11 HAAs by HPLC. The metabolism of two prominent HAAs, 2-amino-3,8-dimethylimidaz...

This research involved an investigation of the application and reaction mechanisms of UV/H2O2 for the simultaneous removal of regulated halogenated disinfection byproducts (DBPs) and odorous aldehydic algal byproducts in the presence of geosmin and 2methylisoborneol, which are earthy-musty odorants that commonly occur in drinking water. UV/H2O2 is an expensive advanced oxidation process that is...

Intersectionality of entrepreneurship has attracted significant scholarship effort over the years (Davidson, Fielden, & Omar, 2010; Gbadamosi, 2015, 2019, 2020; George, Khayesi, Haas, 2016; Hack-...