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From Zdiby to Prague: Designing Tram Logistics for Alza
(IEEE eXplore, 2026) Harant M.; Šedivý M.; Horák T.; Svítek M.
Urban logistics faces increasing pressure to reduce emissions and traffic congestion while maintaining high service levels for e-commerce. This paper develops a general framework for evaluating cargo-tram integration and applies it to a Prague case study linking the planned Zdiby extension with four major Alza branches. The routing problem is formulated on a directed tram graph and solved by a state-extended Dijkstra’s algorithm with turn penalties and stop-visitation states. A second screening step evaluates night-time timetable compatibility on shared passenger infrastructure. For the Prague case, the feasible loop serves Vltavská, Dejvická, Anděl and Pankrác, departs at 03:10, and returns to Zdiby at 06:21. Under the assumed vehicle layout, one tram can transport up to 19 roll cages, corresponding to an upper bound of 4.75 t or approximately 1,710 parcels per trip. The results confirm technical feasibility for night operation, while also identifying noise, timetable coordination, infrastructure access, and
Principles of Object–Process Methodology for System Architecture Modeling in Complex Transport Systems
(IEEE eXplore, 2026) Kremlík V.; Svítek M.; Merunka V.; Kofránek J.
The paper introduces Object–Process Methodology (OPM; ISO 19450) as a unifying approach for designing a modular functional architecture of Mobility Hubs. OPM integrates the structural dimension (objects, assets, roles) and the behavioural dimension (processes, information and energy flows, control) into a single, coherent model. The paper outlines the core principles of OPM and its bimodal representation: graphical Object–Process Diagrams (OPDs) are paired with an equivalent textual specification in Object–Process Language (OPL). This duality supports intelligible communication with non-technical experts, facilitates requirements validation, and enables early detection of errors such as incompleteness, contradictions, or missing links between functions and resources. The practical value of OPM is demonstrated through a simplified case of passenger rail transport within the Czech Republic, where the end-to-end passenger journey is hierarchically decomposed. The example illustrates how OPM integrates processes with the required objects and resources (e.g., the app, ticket, travel plan, station, train, signaling) within a single coherent OPD/OPL model, enabling systematic checks of linkage completeness, decision conditions, and cross-level consistency.
Synergy of Semantic Modeling and Multi-Agent Systems for Resilient Smart City Utility Networks
(IEEE eXplore, 2026) Walletzky L.; Svítek M.; Kozhevnikov S.; Hruška Z.
Bridging the gap between conceptual service design and technical execution remains a critical challenge for Smart City resilience. This research presents a novel integration of the 4DocMod semantic framework with Multi-Agent Technology (MAT) for autonomous utility network management. Using the ”Diamond See” methodology, we deconstruct technical ontologies into dynamic semantic maps. The proposed framework enables ”paradigmatic resilience,” allowing AI agents to switch operational logics—from economic optimization to crisis survival—via a ”Context Bridge.” This approach ensures systemic stability in complex urban ecosystems without requiring modifications to the agents’ core programming.
Multiscale Modeling of Magnetic Functional Materials
(CTU in Prague. Faculty of Electrical Engineering., 2026) Zemen, J.
Magnetic materials underpin many modern technologies, including efficient energy conversion, sensing, and information processing. Simulation-driven design of novel magnetic materials is becoming increasingly important, as it reduces dependence on costly and time-consuming prototyping and experimentation. This habilitation thesis summarises the development of a multiscale simulation framework for Mn-based functional magnetic materials. It is presented as a collection of research articles, most of which also include experimental work by collaborators. This joint theoretical– experimental approach enables model validation and accelerates progress to potential device applications. The reported research follows two main strands, both rooted in the noncollinear antiferromagnetic order of Mn-based antiperovskites. The first strand targets solid-state cooling, a promising alternative to the standard vapour-compression technologies that rely on hydrofluorocarbon working fluids, which are potent greenhouse gases. These are replaced with functional materials such as magnetocaloric and elastocaloric compounds in potential refrigeration and air-conditioning applications. Large caloric responses enabled by frustrated exchange interactions between noncollinear Mn moments are explored using atomic-scale density functional theory (DFT) combined with its disordered-local-moment extension to finite temperature. In particular, a temperature–strain magnetic phase diagram with first-order phase transitions and two previously unreported phases in antiperovskite Mn3GaN has been predicted. In the second strand, the same noncollinear magnetic structure of Mn-based alloys is studied further using linear-response theory based on DFT band structure. Large spintronic effects including the anomalous Hall effect (AHE), the anomalous Nernst effect (ANE), the magneto-optical Kerr effect (MOKE), and N´eel-order spin–orbit torques (NSOT) have been predicted. Together, these provide a toolkit for investigating and subsequently controlling magnetic states of caloric materials. In addition, they open pathways towards the application of the same functional materials in energy-efficient memory, logic, and sensing. In particular, NSOT is an antiferromagnetic analogue of the widely studied spin–orbit torque in ferromagnets, enabling ultrafast, field-free writing compatible with high bit density. Strain-tunable AHE or sizable MOKE have been confirmed in thin Mn3NiN films experimentally by collaborators, while micromagnetic simulations link DFT-derived materials parameters to domain textures detected by ANE. Continuum simulations of magnetostatics, heat dissipation, and strain relaxation in microwires using the finite-element method further support test-device design. Together, the thesis delivers validated multiscale models and practical design rules that connect microscopic interactions to candidate solid-state cooling and information-processing technologies, positioning Mn-based antiperovskites as a rare-earth-free platform for both.
Diagnosis and strengthening of wall structures of a historic church
(Czech Technical University in Prague, 2026-07-07) Thomas, Ella Sinclair; Fajman, Petr; Kabele, Petr; Burgetová, Eva
Kostel Panny Marie pod řetězem, the Church of Our Lady Beneath the Chain, is located within the UNESCO Historic Center of Prague, Czech Republic. This monument holds great cultural significance, as its history dates back to the 12th century and to the founding of the Order of Malta in the Czech lands. The main load-bearing structure consists of mass masonry walls and vaulted ceilings, covered by a timber roof. Throughout its history, the church has been rebuilt or modified in four architectural styles, including Romanesque, Gothic, Renaissance, and Baroque. Since the 19th century, the structure has required only minor interventions, most recently a full roof repair over a section of the structure. After this repair, concerns were raised about significant cracking in the vaulted ceiling and out-of-plane deflection in the main load-bearing walls. A numerical model was built, and finite element software was used to perform a static structural analysis and determine possible causes of the observed damage, the structure's safety, and any required intervention procedures. Results of the complete analysis support a hypothesis that deflection correlates with past construction periods and that cracking resulted from a combination of soil settlement and recent construction. Recommendations for next steps address the roof structure, deflection, and cracking, emphasizing the installation of monitoring devices before making any further modifications to the structure.