The state of Fortran

A community of developers has formed to modernize the Fortran ecosystem. In this article, we describe the high-level features of Fortran that continue to make it a good choice for scientists and engineers in the 21st century. Ongoing efforts include the development of a Fortran standard library and package manager, the fostering of a friendly and welcoming online community, improved compiler support, and language feature development. The lessons learned are common across contemporary programming languages and help reduce the learning curve and increase adoption of Fortran

Physics in Screening Environments

In the current study, we investigated atoms in screening environments likeplasmas.It is common practice to extract physical data, such as temperature andelectron densities, from plasma experiments. We present results that addressinherent computational difficulties that arise when the screening approach isextended to include the interaction between the atomic electrons. We show thatthere may arise an ambiguity in the interpretation of physical properties, suchas temperature and charge density, from experimental data due to the opposingeffects of electron-nucleus screening and electron-electron screening.The focus of the work, however, is on the resolution of inherent computationalchallenges that appear in the computation of two-particle matrix elements.Those enter already at the Hartree-Fock level. Furthermore, asexamples of post Hartree-Fock calculations, we show second-order Green'sfunction results and many body perturbation theory results of second order.A self-contained derivation of all necessary equations has been included. Theaccuracy of the implementation of the method is established by comparingstandard unscreened results for various atoms and molecules against literaturefor Hartree-Fock as well as Green's function and many body perturbationtheory.The main results of the thesis are presented in the chapter called ScreenedResults, where the behavior of several atomic systems depending onelectron-electron and electron-nucleus Debye screening was studied.The computer code that we have developed has been made available for anybody touse.Finally, we present and discuss results obtained for screened interactions. Wealso examine thoroughly the computational details of the calculations andparticular implementations of the method

Microcultivation and FTIR spectroscopy-based screening revealed a nutrient-induced co-production of high-value metabolites in oleaginous Mucoromycota fungi

publishedVersio

Transport gap in a v=1/3 quantum Hall system: a probe for skyrmions

Transport measurements of the activation gap at fractional filling factor 1/3 are compared to results of exact diagonalization, allowing identification of a small anti-skyrmion as the lowest excitation in the low-field regime. In agreement with theory, a crossover to spinless excitations at higher electron densities is observed. Two samples of different quality are investigated. A detailed description of the theoretical calculation of activation gaps is presented and features which should be taken into account are summarized: finite thickness, Landau level mixing, and comparison between different sizes of the model system and-whenever possible-also between different geometries (torus and sphere). Within the chosen model of disorder (entailing a single fit parameter) we obtain a good agreement between calculated energies and experimental results

Biotransformation of animal fat by-products into ARA-enriched fermented bioproducts by solid-state fermentation of Mortierella alpine.

Solid-state fermentation (SSF) is a powerful fermentation technology for valorizing rest materials and by-products of different origin. Oleaginous Zygomycetes fungi are often used in SSF as an effective cell factory able to valorize a wide range of hydrophilic and hydrophobic substrates and produce lipid-enriched bioproducts. In this study, for the first time, the strain Mortierella alpina was used in SSF for the bioconversion of animal fat by-products into high value fermented bioproducts enriched with arachidonic acid (ARA). Two cereals-based matrixes mixed with four different concentrations of animal fat by-product were evaluated for finding optimal conditions of a fat-based SSF. All obtained fermented bioproducts were found to be enriched with ARA. The highest substrate utilization (25.8%) was reached for cornmeal and it was almost double than for the respective wheat bran samples. Similarly, total fatty acid content in a fermented bioproduct prepared on cornmeal is almost four times higher in contrast to wheat bran-based bioproduct. Although in general the addition of an animal fat by-product caused a gradual cessation of ARA yield in the obtained fermented bioproduct, the content of ARA in fungal biomass was higher. Thus, M. alpina CCF2861 effectively transformed exogenous fatty acids from animal fat substrate to ARA. Maximum yield of 32.1 mg of ARA/g of bioproduct was reached when using cornmeal mixed with 5% (w/w) of an animal fat by-product as substrate. Furthermore, implementation of attenuated total reflectance Fourier transform infrared (ATR-FTIR) spectroscopy in characterization of obtained SSF bioproducts was successfully tested as an alternative tool for complex analysis, compared to traditional time-consuming methods