PUBLIKACJE AGH

Permanent URI for this communityhttps://repo.agh.edu.pl/handle/AGH/102727

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artykuły, książki, fragmenty, wydane oficjalnie, jak również wersje przed publikacją (preprinty, postprinty).
publikacje powstałe w ramach realizowanych na Uczelni projektów badawczych,
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Now showing 1 - 20 of 377

Access status: Open Access ,
2030 roadmap on two-dimensional materials for energy storage and conversion
(2026) Ding, Lan; Qi, Kezhen; Huang, Zimo; Yu, Ying; Yang, Ze; Tabibi, Sepehr; Khataee, Alireza; Hao, Lei; Zhang, Qitao; Popkov, Vadim; Kaneva, Maria; Lobinsky, Artem; Yu, Zhipeng; Li, Jun; Sultan, Amir; Zheng, Kun; Qu, Gan; Ma, Dandan; Shi, Jian-Wen; Ismail, Ahmed
Wydział Energetyki i Paliw
Two-dimensional (2D) materials have rapidly emerged as transformative platforms for energy storage and conversion, owing to their atomic-scale thickness, tunable electronic structures, and versatile chemical functionalities. Over the past five years, remarkable advances in material synthesis, interface engineering, and device integration have unlocked new opportunities, yet challenges in stability, scalability, and performance optimization remain. In this roadmap, we provide an updated perspective toward 2030, systematically reviewing eleven representative 2D material classes, which can be broadly grouped into carbon-based materials, inorganic semiconductors, framework materials, and layered nanosheet systems. Their opportunities and challenges in electrochemical energy storage, photocatalysis, and electrocatalysis are highlighted. We believe this roadmap can enrich the development of 2D materials for sustainable energy technologies, and provide useful guidance for both fundamental studies and practical applications in the coming decade.
Access status: Open Access ,
3D carbon based phase change composites: A review on progress in fabrication strategies, thermal energy storage-conversion efficacy, prototypes, numerical models and applications
(2024) Das, Madhurima; Stachewicz, Urszula
Wydział Inżynierii Metali i Informatyki Przemysłowej
LHTES has emerged as an efficient and viable solution to mitigate a large amount of renewable and sustainable thermal energy wastage from solar radiation and industrial production in the twenty-first century. To date, 3D carbon/PCM composite has brought remarkable attention for achieving high performance in this field. This review provides a comprehensive outlook on the progress of 3D carbon and PCM-based composite materials as high-performance LHTES materials over the past 10 years, focusing on the synthesis strategies of 3D carbon, PCM infiltration process, and thermophysical attributes of 3D carbon/PCM composite. Furthermore, an effort has given to conduct rigorous literature to explore the utilization of different numerical assumptions and models for describing the heat transfer process between 3D carbon and PCM, thermal conductivity evaluation for the composite, and the mechanism of 3D carbon/PCM composite for battery thermal management and building application. The investigation of the advanced applications of 3D carbon/PCM composites reveals its potential utilization in building comfort, waste-heat recovery, power generation, and thermotherapy-based applications. Finally, the current shortcomings and future challenges associated with the developments of such composite are encountered. This comprehensive review will show the future pathway for researchers to develop high-performance composites in thermal management.
Access status: Open Access ,
A review of nanofiber electrodes and the in situ exsolution of nanoparticles for solid oxide cells
(2025) Lach, Jakub; Gogacz, Michał; Winiarz, Piotr; Ling, Yihan; Zhou, Mingjiong; Zheng, Kun
Wydział Energetyki i Paliw
Solid oxide cells (SOCs) can operate efficiently in solid oxide fuel cell (SOFC) and/or solid oxide electrolysis cell (SOEC) modes, and are one of the most promising electrochemical devices for energy conversion and storage, facilitating the integration of renewable energies with the electric grid. However, the SOC electrodes suffer performance and stability issues, especially in the case of fuel electrodes when SOCs are fueled by cheaper and more available fuels such as methane and natural gas. Typical Ni-YSZ cermet fuel electrodes suffer problems of coarsening, carbon deposition, and sulfur poisoning. Therefore, developing new electrodes using novel design strategies for SOCs is crucial. In this review work, the fuel electrode development strategies including the in situ exsolution of nanoparticles, multi-elemental nanocatalysts, and nanofiber materials have been reviewed and summarized for the design of new electrodes for SOCs. Nanofiber electrodes with in situ exsolved nanoparticles, which combine the advantages of a unique nanofiber microstructure and stable and active exsolved nanoparticles, are of great interest and significantly contribute to the development of high-performance fuel electrodes for SOCs.
Access status: Open Access ,
AA2024/fly ash lightweight composites fabricated by powder metallurgy
(2024) Nikiel, Piotr
The paper presents the experimental results on the fabrication of lightweight aluminum alloy AA2024 matrix composites reinforced with fly ash microspheres using powder metallurgy (PM) via hot pressing. The primary aim was to achieve a composite with the highest possible matrix density while preserving undamaged microspheres. A mixture of powders consisting of AA2024 alloy powder and 10 wt% fly ash was pressed at 550°C and pressures of 5, 10, 20, and 30 MPa for two minutes. The obtained composites had densities in the range of 1.93 - 2.31 g/cm3. Microstructural analysis revealed uniform distribution of the fly ash microspheres in the aluminum alloy matrix. The hardness of the composites was comparable only between the samples pressed at 10, 20, and 30 MPa, falling within the range of 118 to 122 HV0.1. The sample pressed at 5 MPa exhibited significantly lower hardness of 98.8 HV0.1. The composites produced by pressing at 20 and 30 MPa were characterized by high yield strength and compression strength, ranging from 211 to 216 MPa and 300 to 354 MPa, respectively. The composites pressed applying lower pressures, especially those at 5 MPa, exhibited significantly lower values of plastic yield strength and compression strength, with values of 109 MPa and 115 MPa, respectively. Taking into account the density, the number of damaged microspheres, and the microstructure of the AA2024/fly ash composite, the optimal pressing range is between 10 - 20 MPa, but superior mechanical properties were achieved after pressing at 20 and 30 MPa.
Access status: Open Access ,
Advancements in ZnO-based photocatalysts for effective rhodamine dye removal from water
(2024) Das, Madhurima; Ghatak, Avishek; Ray, Preetam Guha; Stachewicz, Urszula
Wydział Inżynierii Metali i Informatyki Przemysłowej
The escalating growth of industries, population, and urban culture has exacerbated the global challenge of contaminated water due to hazardous organic dyes. One such noxious dye, rhodamine, poses a significant threat to human health and has consequently prompted extensive research into its removal from wastewater. Nanostructured ZnO emerges as a promising photocatalyst for tackling such hazardous colorants, owing to its exceptional performance and heightened surface reactivity. This review article comprehensively examines the photocatalytic removal of rhodamine dye by various ZnO nanomaterial-based catalysts over the past few decades. The primary objective is to investigate the impact of different synthesis techniques and modifications of ZnO, including doping with metal ions, carbon, and sulfur, or the creation of composites with various low-dimensional carbon materials, metal oxides, metal sulfides, and polymers. These strategies have been explored to enhance the efficacy of rhodamine dye remediation from wastewater by harnessing the improved photocatalytic performance of ZnO nanomaterials. The review delves into recent literature reports, highlighting observed results and key findings addressing critical challenges and outlines prospects for ZnO-based photocatalysts in rhodamine dye remediation. It becomes evident that evolving synthesis methods and optimizing the heterojunction of ZnO photocatalysts are essential for advancing the efficacy of rhodamine dye removal and contributing to the creation of a cleaner and greener environment.
Access status: Open Access ,
Aerial SLAM algorithm with global alignment using satellite imagery
(Wydawnictwa AGH, 2023) Karbowski, Jakub; Bartoszewski, Bartosz; Kokot, Daria; Kwiecień, Michał Jan; Turlej, Tymoteusz
Simultaneous localization and mapping (SLAM) algorithms can be used in aerial vehicles with a down-facing camera for navigation and terrain mapping. However, they suffer from an incremental position error. Each neighbouring image pair match introduces an alignment error which accumulates to a global position error proportional to the map size. By using a reference satellite image map this error can be reduced to a constant factor. This work proposes a novel image alignment algorithm called Embed Match which can be applied to any SLAM algorithm. Embed Match uses a neural network to represent a map region as a field of embedding vectors which are a semantic representation of the area. By comparing the embedding fields of a satellite image and the camera image, an alignment function is defined. Maximising this function leads to image alignment. The proposed algorithm shows a radically different approach from keypoint-based alignment methods which usually struggle with matching drastically different images, such as satellite and real camera images.
Access status: Open Access ,
Agent-Based Metaheuristics in Search and Optimisation
(Wydawnictwa AGH, 2013) Byrski, Aleksander
In the domain of computing, an everlasting requirement for developing new metaheuristics for particular problems, coming right from the well-known no free lunch theorem, may be observed. The need for new search and optimisation methods, hybrid ones in particular, paves the way for the development of different metaheuristics, going beyond classical methods (such as population-based ones). Evolutionary multiagent systems (EMAS), which brings together interesting features of agency (such as autonomy) and inspirations coming from population-based techniques, is a good example of such promising methods. However, constructing complex metaheuristics without a detailed description of their structure and behaviour may become pointless, and novel methods, though yielding promising results in particular cases, may be underestimated, because they have not been fully understood and analysed. This dissertation focuses on the issues concerning the justification of using agent-based metaheuristics (in particular EMAS and its variants), preparing of dedicated formal model, conducting an analysis aimed at proving so-called asymptotic guarantee of success and performing experimental analysis of the considered methods. These issues may be treated as the most important and novel aspects of this dissertation. In the beginning of the monograph, a systematic state-of-the-art review is given, then the concepts of EMAS and its modifications are discussed, later the formal model of structure and dynamics of the system using Markov-chains is described. Finally, the outcomes of a broad series of experiments on selected benchmark and real-world problems are discussed. The results presented in this dissertation are useful for practitioners who would to use agent-based metaheuristics and to obtain a deeper insight into the details of their design, experimental and formal features.
Access status: Open Access ,
Agile Management
(Wydawnictwa AGH, 2023) Szyjewski, Zdzisław
The changes caused by a pandemic have a very strong impact on many areas of activity. The long-term plans set out in the operating strategy of companies and organizations have become of little use in the new business conditions. Many companies are urgently required to develop a new strategic approach that takes account of the post-pandemic situation. The question is whether the traditional approach to strategy building and strategic management can be applied. The article analyzes strategic management in new conditions and proposes a new agile approach called digital stractics.
Access status: Open Access ,
AI in higher education: academic support or ethical dilemma? Analyzing student use of GPT models during exams
(Wydawnictwa AGH, 2025) Rożek, Karolina
With the increasing integration of artificial intelligence tools, such as GPT models, in higher education, their impact on learning processes and academic integrity has become a subject of growing research interest. This article presents a qualitative analysis of students’ responses to open-ended questions from a broader survey on the use of GPT models specifically during exams, focusing on their declarations regarding AI use and the ways in which they utilized these tools in exam settings. The findings reveal that while some students perceive AI as a learning aid that reduces stress, others exploit it to bypass traditional assessment methods, particularly in subjects they deem less valuable. The analysis underscores the ethically ambiguous role of AI in education, highlighting the need to adapt evaluation strategies, and address the challenges posed by the growing presence of AI (not only) in academia. Future research should focus on disciplinary differences, institutional policies, and the long-term cognitive effects of AI use by students.
Access status: Open Access ,
Aktywność ekonomiczna Ukraińców w Krakowie i Małopolsce w latach 2022-2024: co zadziałało i dlaczego?
(2024) Bagliuk, Artur
Wydział Humanistyczny
Access status: Open Access ,
An adaptive framework for mobile robot navigation
(2017) Güzel, Mehmet Serdar; Kara, Mehmet; Beyazkılıç, Mehmet Sıtkı
Collective behaviours observed in nature bring new methodologies in proposing control algorithms for robot groups to perform a variety of complex tasks. In this article, an adaptive algorithm, allowing the safe navigation of a group of robots in a collective manner, is proposed. The algorithm, inspired from the adaptive particle swarm optimization technique, proposes an efficient control approach to overcome both static and moving obstacles. Accordingly, compared to the conventional particle swarm optimization algorithm, the proposed system allows a robot or group of robots (swarm) to complete the goal while avoiding static and moving obstacles as well as dynamic targets in a safe and collective manner. The simulation results verify the overall performance and reliability of the proposed system.
Access status: Open Access ,
An analysis of overvoltage exposures and their broadband impact on power transformers
(Wydawnictwa AGH, 2025) Kuniewski, Maciej
Access status: Open Access ,
Analiza anizotropii właściwości mechanicznych stopu magnezu typu WE43
(Wydawnictwa AGH, 2023) Dudziński, Michał; Waląg, Michał; Kula, Anna
The article presents experimental work on the anisotropy aspects of the mechanical properties of WE43 alloy and technically pure magnesium (99.95%) obtained by hot extrusion. The experimental work includes structural and phase characterisation of as-extruded materials and uniaxial compression tests conducted parallel and perpendicular to the extrusion direction. Complementary studies of the macrotexture of materials before and after plastic deformation were carried out. Based on received results the degree of anisotropy of the mechanical properties of the tested materials was determined. The texture was identified as an important factor determining the activation of particular deformation mode of the materials after extrusion. Keywords: WE43 alloy, anisotropy, texture, compression test, microstructure
Access status: Open Access ,
Analiza drgań konstrukcji fundamentu pod dmuchawę ciągu spalin
(Wydawnictwa AGH, 2024) Tokarz, Patryk
The subject of the article is an FEM model of a block reinforced concrete foundation for an exhaust gas blower. Devices of this type are used in installations discharging exhaust gases, e.g. from a heating furnace. This work analyzes the vibrations of a foundation model with distributed mechanical elements (including engine, bearings, blower) described as point masses with appropriate inertial properties. The loads of the FE model are harmonic forces resulting from the rotational motion of the shaft and the assumed mass unbalance eccentricities of the engine and blower. The displacements and vibration velocities of selected points of the foundation model were analyzed. Calculations were performed using the Hexagon.Marc program.
Access status: Open Access ,
Analiza efektywności różnych rodzajów ziem filtracyjnych w rafinacji parafiny na przykładzie przedsiębiorstwa Terra Trade
(Wydawnictwa AGH, 2024) Udaliszczew, Jan
Modern industrial production of paraffin and other hydrocarbon-based products, such as mineral oils or waxes, is extremely closely related to the process of raw material purification. One of the key stages of this process is paraffin filtration, which aims to remove impurities and undesirable substances that may affect the quality and properties of the final product. Filter earth plays an irreplaceable role in the paraffin filtration process. The paper presents the main aspects related to soil for paraffin filtration, including its physical and chemical properties, production processes and use in industry. The aim of the work is to analyze the effectiveness of types of filter soil in terms of the quality of the finished raw material and to present other methods of paraffin purification. This work provides a comprehensive look at paraffin filtration soil and provides the necessary knowledge to understand its key role in the production process.
Access status: Open Access ,
Analiza efektywności różnych strategii utrzymania ruchu
(Wydawnictwa AGH, 2023) Ziaja, Szymon; Bogacz, Paweł
Wzrastający w ostatnich latach stopień automatyzacji i zaawansowania technologicznego maszyn i urządzeń sprawia, że firmy produkcyjne mają względem nich coraz większe wymagania. Obiekty techniczne mogą je spełnić, jeżeli w organizacji wprowadzi się odpowiednie strategie zarządzania utrzymaniem ruchu. Celem artykułu jest porównanie efektywności różnych strategii utrzymania ruchu i wskazanie takiej, która po wdrożeniu może przynieść przedsiębiorstwu największe korzyści w konkretnych warunkach produkcyjnych. W artykule zostanie przedstawiony rozwój podejścia do utrzymania ruchu w przedsiębiorstwach, wady i zalety wybranych strategii oraz wskazane zostaną przykładowe determinanty wdrożenia konkretnego programu utrzymania ruchu maszyn w firmach produkcyjnych.
Access status: Open Access ,
Analiza fundamentu i korpusu elektrowni wiatrowej
(Wydawnictwa AGH, 2024) Świerczek, Jakub
In this paper, the foundation and body of a wind turbine were analyzed using Hexagon. Marc/Mentat software. A spatial FEM model of a reinforced concrete foundation slab supported on the ground and a steel body consisting of shell, perimeter and longitudinal frames was created. The reinforced concrete is formed by a coherent mesh of 8-node spatial elements, the body is formed by 4-node shell elements of the shell, longitudinal and transverse frames. The generator and rotor blades of the wind turbine were replaced by masses centered at the centers of gravity of these elements and the corresponding mass moments of inertia. Wind pressure was represented in terms of forces and pressures. An analysis of these quantities in terms of maximum operational wind speed was carried out. The purpose of the study was to create a numerical model of the foundation and body of a wind turbine, where the 750 kW Lagerwey LW58 power plant was modeled. In the calculations, the displacements from static loads, natural frequencies and vibration velocities of the foundation and body in the selected frequency range of forcing forces were determined.
Access status: Open Access ,
Analiza mikroklimatu pomieszczenia mieszkalnego
(Wydawnictwa AGH, 2024) Ciupa, Adam
This article presents the essence of ensuring appropriate conditions in living quarters, ventilation and central heating systems in the civil engineering from the period of the Polish People’s Republic (PRL) and the course of research into the microclimate of a living quarter on an actual example. Based on the obtained results, appropriate conclusions concerning the modernization were made. They can be applied to many rooms of this type in Poland. The research showed that in the indicated room, the outdated window and balcony door should be replaced with new ones with automatic air diffusers with a fine filters and a sectional cast iron radiator with a plate one. Central heating installation pipes should be insulated. In addition, it will be necessary to place an air humidifier. What’s more, it is recommended to invest in an air purifier.
Access status: Open Access ,
Analiza możliwości budowy soczewki akustycznej z wykorzystaniem metamateriałów akustycznych
(Wydawnictwa AGH, 2025) Hyla, Jadwiga
Acoustic lenses are systems designed to focus acoustic waves passing through them. They find widespread applications, particularly in medicine, for manipulating ultrasonic acoustic waves. However, the problem addressed in this lecture pertains to a lens designed for lower frequency ranges, where manipulating the incident wave requires consideration of different parameters and larger lens dimensions. The study explores the feasibility of constructing a lens using periodically arranged acoustic elements, such as Helmholtz resonators, forming a metamaterial structure. To select appropriate parameters and geometric dimensions of the system, the particle swarm optimization (PSO) method was employed, and the entire process of determining the required parameters was algorithmized.
Access status: Open Access ,
Analiza numeryczna zachowania się stalowego gazociągu usytuowanego na różnych wysokościach osuwiska
(Wydawnictwa AGH, 2023) Kowalska-Kubsik, Iwona
Praca dotyczy analizy numerycznej zachowania stalowego gazociągu na osuwisku. Osuwiska są powszechnym zjawiskiem geologicznym, mogącym uszkodzić gazociągi. Wykorzystano zaawansowane metody obliczeniowe, m.in. model gruntowy Druckera–Pragera i dynamiczny oraz statyczny model obliczeniowy. Analiza numeryczna pozwoliła ocenić wpływ miejsca położenia gazociągu na naprężenia, odkształcenia i ryzyko uszkodzeń. Wyniki badań dostarczyły wartościowych informacji inżynierskich do projektowania, konstrukcji i utrzymania gazociągu. Optymalizacja projektu, materiałów i systemów podparcia zmniejszy ryzyko uszkodzeń. Wnioski z analizy mogą pomóc instytucjom regulacyjnym i operatorom gazociągów w zarządzaniu ryzykiem związanym z osuwiskami, poprawiając bezpieczeństwo i niezawodność infrastruktury gazowej.