TU Bergakademie Freiberg

Non-linear mechanical field reconstruction coupling recurrent neural networks with physics-informed graph neural networks

Reconstructing local stress fields in heterogeneous microstructures under non-linear, history-dependent loading remains a major computational bottleneck in multi-scale simulations. We propose a coupled LSTM-GNN framework that links the temporal and spatial aspects of local stress...

Potassium isotopes reveal lithospheric control on the evolution of deep-sourced carbonated silicate magmas

Kimberlites and related CO2-rich ultramafic rocks such as aillikites commonly show Nd-Hf isotope decoupling (unradiogenic εHf at a given εNd), attributed to either recycled oceanic slabs or interaction with metasomatized continental lithospheric mantle (CLM). We present potassium...

Isobaric Vapor–Liquid Equilibria of Binary and Multicomponent Organic Carbonate Mixtures (DMC, EMC, DEC, EC, and PC) at 101.3, 25.0, and 5.0 kPa

Abstract Isobaric vapor–liquid equilibrium (VLE) data were determined for all ten binary combinations of dimethyl carbonate (DMC), ethyl methyl carbonate (EMC), diethyl carbonate (DEC), propylene carbonate (PC), and ethylene carbonate (EC) at 101.3 and 25.0 kPa using a dynamic re...

Heat Treatment Effects on Additively Manufactured Polymer Matrix Composites

Additive manufacturing (AM) of polymer matrix composites (PMCs) enables the fabrication of complex, structurally efficient parts, but the layer-wise thermal history intrinsic to processes such as material extrusion, vat photopolymerization, powder bed fusion, and direct ink writi...

Four‐Level Overlapping Schwarz as Multigrid Coarse Solver for Incompressible Non‐Newtonian Flow in Complex Geometries

ABSTRACT For complex geometries, the coarse problem of geometric multigrid can be too large to be solved by a direct solver. Here, we report on the use of domain decomposition applied to the multigrid coarse problem. Additive overlapping Schwarz methods are domain decomposition m...

Methanol — flexible energy and carbon vector for the achievement of the dual goals of decarbonization & carbon circularity

In a world with geopolitical conflicts and uncertainties, numerous import-dependent nations are facing a dilemma in achieving a parallel carbon transition from (1) fossils to renewables, (2) a linear to a circular carbon economy, and (3) reliance on imported to domestic carbon re...

Green hydrogen promotion in Cameroon: Implications for sustainable development

This paper argues that green hydrogen could be a driver of the technological transformation of a small open economy well integrated into the global energy market. Green hydrogen development is key to a sustainable transition of the economy. It can replace CO 2 -intensive technolo...

Evidence from alkaline magmatism for fluorine- and bromine-enriched cratonic mantle roots

The base of cratonic lithospheric mantle (cratonic root) is a key volatile-rich reservoir (e.g., carbon and halogens), formed through long-term metasomatism by deep-derived incipient melts, whose reactivation has been proposed to drive climatic change over the course of Earth his...

Caysichite-(Y) Ca4(Y,REE)4(Si8O20)(CO3)6·8H2O: Endmember Composition and Structure Established from New Occurrences Across Different Geologic Settings

Abstract The heavy rare earth element silicate-carbonate mineral caysichite-(Y) [Ca4(Y,REE)4(Si8O20)(CO3)6·8H2O] was discovered in the alkaline granite of the Golden Horn Batholith, near Washington Pass, Okanogan County, Washington, USA, as sub-millimeter euhedral orthorhombic pa...

Enhancing Asphaltene Degradation Through the Piezocatalysis Process Using Cadmium Tin Oxides Rod-Like and Cubic-Like Ceramic Nanostructures

The study focused on achieving high rates of asphaltene degradation by controlling the morphology and composition of the cadmium tin oxide (CTO) piezocatalyst. A new, fast, and clean method for asphaltene degradation was employed using the piezo-catalytic process. The performance...

Participants using GenAI in online studies: an overview and recommendations for researchers and reviewers

Participants’ use of generative artificial intelligence (GenAI) to create responses in online studies can threaten data authenticity and research validity. This issue is particularly pressing in settings where participation is paid for. In response, researchers have begun to deve...

Mechanical behavior and fracture mechanisms of rock-backfill composites under different hole geometries and backfill conditions

Abstract Rock-backfill composites, as key load-bearing structures in deep mining, exhibit mechanical behavior and failure mechanisms that are predominantly controlled by excavation-induced hole geometry and backfill conditions. In this work, a series of uniaxial compression tests...

Building Target-Language Cybergrooming Detectors from English-Language Datasets: A Machine Translation Pipeline

Automated cybergrooming detection can support the review of large volumes of online communication, but public datasets and detection approaches remain predominantly English-centered. This study presents a reproducible workflow for constructing target-language cybergrooming datase...

Unitary representations and von Neumann’s continuous geometries

We prove that the unit group of a nondiscrete irreducible, continuous ring, in the sense of John von Neumann, does not admit any nontrivial unitary representation continuous with respect to the strong operator topology.

Dynamic and Post-Deformation Static Aging as an Integrated Approach to Thermomechanical Processing of TiNi Shape Memory Alloys

The effect of thermomechanical processing (TMP) parameters on the structural-phase evolution and properties of Ni-enriched Ti–50.8 at.% Ni shape memory alloy was investigated. Compression deformation was performed at T = 300–500 °C, accompanied by the development of dynamic aging...

Assessment of anthropogenic trace metal and surfactant influence on a coastal area in the Northern Adriatic Sea using scientific diving

Abstract Thisvestigates the anthropogenic footprint on a coastal marine environment near the Istrian coast (Northern Adriatic Sea) through a scientific diving field campaign conducted in September 2025. The investigation aimed to evaluate local seawater quality by combining onsit...