Browsing by Type "artykuł"

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Access status: Open Access ,
(1,2)-PDS in graphs with the small number of vertices of large degrees
(Wydawnictwa AGH, 2025) Bednarz, Urszula; Pirga, Mateusz
We define and study a perfect $(1,2)$-dominating set which is a special case of a $(1,2)$-dominating set. We discuss the existence of a perfect $(1,2)$-dominating set in graphs with at most two vertices of maximum degree. In particular, we present a complete solution if the maximum degree equals $n-1$ or $n-2$.
Access status: Open Access ,
»10 praktycznych sposobów na integrację Romów«, czyli analiza współczesnej sytuacji społeczności romskich z perspektywy antropologii darów
(Wydawnictwa AGH, 2014) Witkowski, Maciej
The article is based on the results of ethnographic fieldwork in the local Bergitka Roma settlements in Poland and their social environment conducted over the past three years Roma communities in Poland are currently a subject of intensive interactions with the »mainstream society«, whose aim is socio-economic integration. Just as in the classic study of Marcel Mauss we also have to deal with an expected value exchange here. Mainstream society gives a gift in the form of funds for »integrative practices« and hopes that on the basis of reciprocity, Roma communities abandon those elements of their traditional way of life which can be problematic in a »democratic« and »integrated« society. Ihc exchange of gifts is usually more of a symbolic action than satisfying »objective« needs. It is rather a sign of mutual recognition, a tactic to build social bonds. The text shows how the existing practice of integrating by gifts sometimes leads to moral humiliation.
Access status: Open Access ,
100-lecie Biblioteki Głównej AGH - podsumowanie obchodów
(Akademia Górniczo-Hutnicza, 2022) Imiołek-Stachura, Karolina; Podrazik, Agnieszka
Biblioteka Główna
Access status: Open Access ,
127 lat geologii inżynierskiej
(Wydawnictwa AGH, 2008) Kaczyński, Ryszard R.
127 years have elapsed in 2007 since the publication of the first manual of engineering geology marking the historical commencements of this discipline. The beginnings, scope, competences and activities of engineering geologists over the years 1880-2007 are discussed. Two basic periods can be distinguished in the history of engineering geology: the first - till 1964 that is till the foundation of the International Association of Engineering Geology and the Environment (IAEG) and the second one after 1964. The role of IAEG is coordinating and initiating engineering geological activities and its statutes define the scope of competences of engineering geologists. The beginnings and development of Polish engineering geology are discussed against the international engineering geological background. The report of the Joint European Working Group (JEWG) reviewed in the final part of the present paper defines the position of engineering geology among other geoengineering disciplines and such international bodies as ISSMGE (International Society for Soil Mechanics and Geotechnical Engineering) and ISRM (International Society for Rock Mechanics). Over the years engineering geology has become an independent discipline in scientific hierarchy equal to soil and rock mechanics.
Access status: Open Access ,
16 Międzynarodowe Sympozjum Solne Ouo Vadis Sal, 13-15 października 2011, Toruń
(Wydawnictwa AGH, 2012) Czapowski, Grzegorz; Kortas, Grzegorz
Access status: Open Access ,
2-biplacement without fixed points of (p,q)-bipartite graphs
(2005) Orchel, Beata
In this paper we consider 2-biplacement without fixed points of paths and $(p, q)$-bipartite graphs of small size. We give all $(p, q)$-bipartite graphs $G$ of size q for which the set $\mathcal{S}^{*}(G)$ of all 2-biplacements of $G$ without fixed points is empty.
Access status: Open Access ,
2-DOF piezoelectric actuator controller based on FPGA
(2013) Prusak, Daniel; Karpiel, Grzegorz; Gac, Konrad
This article presents the method for controlling the piezolegs motor with the application of the FPGA (Field-programmable gate array) system and presents the results of conducted tests of the motor slider displacement, with various steering signal configurations. It includes also the review of piezoelectric motors solutions and characteristics of systems, based on FPGA systems. Suggested steering solution can be used for subsequent tests on piezolegs drives and can constitute positioning system element.
Access status: Open Access ,
2-hyperreflexivity and hyporeflexivity of power partial isometries
(2016) Piwowarczyk, Kamila; Ptak, Marek
Power partial isometries are not always hyperreflexive neither reflexive. In the present paper it will be shown that power partial isometries are always hyporeflexive and $2$-hyperreflexive.
Access status: Open Access ,
2-splittable and cordial graphs
(2010) Cichacz-Przeniosło, Sylwia
E. Miller and G. E. Stevens proved in [E. Miller, G. E. Stevens, <i>Some graphs for which even size is sufficient for splittability</i>, Congressus Numerantium 173 (2005), 137–147] the existence of certain families of $2$-splittable caterpillars. In this paper we characterize other families of $2$-splittable caterpillars. Moreover, we show that for some of them there exists a friendly labeling inducing two isomorphic subgraphs.
Access status: Open Access ,
20 lat kruszyw w polskiej gospodarce. Historia, teraźniejszość, przyszłość
(Wydawnictwa AGH, 2010) Kabziński, Aleksander Mikołaj
Without air, water and... aggregates there is no life and economic activity. The production of aggregates, cheap, common, available building material is the answer for the economy's demand, including the construction industry. The time from political and economical transformation of 1989 is the example of cyclical downfalls, stabilizations and growth periods, even with insufficient supply times. There is a proven dependence between GDP and the demand for aggregates. Nowadays, aggregates are both natural (including crushed and sand-gravel aggregates) and artificial, including those from recycling. The quantitative majority of the former does not allow to ignore the latter. During last 20 years the aggregate industry gathered different experiences. From the processes of ownership changes, through technical and technological changes, implementing European standards of aggregate quality to becoming a decent player in the European aggregate industry. The paper presents experiences, evaluations and prognosis the come out of the activity of industry's leading organization - Polish Association of Aggregates Producers Employers that is closely related with the representative group of producers with different quality and quantity of production, but also different capital structure and way of functioning. The prognosis about market demand and production capacity is presented together with threats that may become obstacles in fulfilling the industry's most important task: providing the growing economy with aggregates. The paper describes the experiences of other countries, both old and new members of European Union and Polish experiences that come out of our six- year presence in its structures.
Access status: Open Access ,
20 lat metody georadarowej w Katedrze Geofizyki na Wydziale Geologii, Geofizyki i Ochrony Środowiska AGH w aspekcie realizowanych w niej prac naukowo-badawczych
(Wydawnictwa AGH, 2009) Gołębiowski, Tomisław
The paper presents 20 years history of development of GPR method in the Department of Geophysics at Faculty of Geology, Geophysics and Environmental Protection at AGH University of Science and Technology starting from one-channel analog georadar up to multichannel digital device. In the chronology way there is described how the advancement of GPR devices influenced in to the level of scientific works. The paper presents a brief description of realized works and there are many citations which can help the reader to find particular information about results of carried out investigations.
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 ,
25 years of Gazprom on the gas market
(2015) Kosowska, Katarzyna; Kosowski, Piotr
Gas sector was one of the best growing industries of the Soviet Union in the last two decades of its existence. This was made possible thanks to the discovery and exploitation of natural gas fields in Western Siberia, as well as the construction of transmission infrastructure - domestic and export pipelines. The history of the Russian gas industry is inextricably linked with the activity of Gazprom, the gas concern set up in 1989 in place of liquidated Ministry of Gas Industry. The article gives a summary of the 25-year history of Gazprom and its economic, social and political role. It discusses activities of the company on internal and external markets, issues of gas reserves, production and transmission, as well as the financial and political relationship with the authorities of the Russian Federation.
Access status: Open Access ,
2D Electrical Resistivity Tomography interpretation ambiguity - example of field studies supported with analogue and numerical modelling
(Wydawnictwa AGH, 2013) Bania, Grzegorz; Ćwiklik, Michał
Single Electrical Resistivity Tomography (ERT) survey was carried out in the Manor and Park Complex in Nowa Huta (Krakow Branice, Poland). It was applied at a small distance and parallel to the longer wall of a monumental building containing an empty 3 m deep basement. Analogue modelling was performed in order to recreate the field study at the proper scale. The laboratory set-up consisted of a water tank where electrodes were mounted to the particular plate, which rested on water surface. The basement model was made out of a non-conducting material. The default and robust inversions were tested and these variants were also considered with the use of numerical modelling. Laboratory experiments have confirmed that zones visible in the interpreted field section are caused by the influence of the building cellar located next to the survey line. Zones of this kind are additionally disturbed by the local geological structure. The experiment has pointed out, among others, that as the distance between the survey line and the underground body increases, the inversion results are still burdened by an object influence. Thus, similar situations can be verified with the use of analogue modelling presented in this paper or 3D numerical one.
Access status: Open Access ,
2D radar technology increasing productivity by volumetric control and hopper car positioning in brown coal mining
(Wydawnictwa AGH, 2011) Winkel, Reik; Augustin, Christian; Nienhaus, Karl
The continuous brown coal mining technology has been highly advancing by mechanical design within the last decades. The driving factor has been the demand for increasing productivity and total availability. Indurad - the industrial radar company - addresses both of these factors with its solutions in increasing the utilization of mining machinery. Indurads technological solutions are helping to optimize the brown coal flow chain from across the. Starting at the excavators working bench (cutting depth control) via the belt transfer units (positioning), on the conveyor belt (volumetric flow) and finally to the stockpile volume scan (stockpile inventory control). The key for its solutions is a highly robust unique two-dimensional radar technology which has been specially developed for the rough mining environment. Within the paper successful applications are shown for the German brown coal mining as well as other solutions realized with Indurad's technology in the global mining industry.
Access status: Open Access ,
3-biplacement of bipartite graphs
(2008) Adamus, Lech; Leśniak, Edyta; Orchel, Beata
Let $G=(L,R;E)$ be a bipartite graph with color classes $L$ and $R$ and edge set $E$. A set of two bijections $\{\varphi_1 , \varphi_2\}$, $\varphi_1 , \varphi_2 :L \cup R \to L \cup R$, is said to be a $3$-biplacement of $G$ if $\varphi_1(L)= \varphi_2(L) = L$ and $E \cap \varphi_1^*(E)=\emptyset$, $E \cap \varphi_2^*(E)=\emptyset$, $\varphi_1^*(E) \cap \varphi_2^*(E)=\emptyset$, where$\varphi_1^*$, $\varphi_2^*$ are the maps defined on $E$, induced by $\varphi_1$, $\varphi_2$, respectively. We prove that if $|L|=p$, $|R|=q$, $3 \leq p \leq q$, then every graph $G=(L,R;E)$ of size at most $p$ has a $3$-biplacement.
Access status: Open Access ,
3-dimensional surface magnetic susceptibility distributions with depth to investigate anthropogenic pollutants boundary in Abuja Metropolis
(Wydawnictwa AGH, 2016) Jatto, Solomon Sunday; Sule, Peter Ojo; Ahmed, Lawal Aminu
Changes in the magnetic susceptibility of topsoil, especially in urban areas, are greatly affected by the deposition of anthropogenic metallic dust arising from industrial activities, the burning of fossil fuels, car wear, and tyre abrasion. In this study, magnetic susceptibility measurements were carried out in vertical soil profiles of 30.0 cm depth from the surface at 10.0 cm intervals in about 431 locations within the Abuja metropolis with a view to investigate the penetration ability of magnetic pollutants in the ground. From the obtained data, 3-D surface contour maps were plotted for different depths. The results show a magnetic susceptibility decrease from the surface down the ground to the depth of 30.0cm, most of the recorded susceptibilities were of an anthropogenic origin rather than pedogenic activities. This indicates that the anthropogenic dust depositions are mostly a surface phenomenon and may therefore not pose a risk to groundwater aquifers and near surface wells.
Access status: Open Access ,
3D block modelling of the Sin Quyen IOCG deposit, North Vietnam
(Wydawnictwa AGH, 2023) Dương Văn, Hào; Nguyẽ̂n, Dinh Chau; Klityński, Wojciech; Zygo, Władysław; Nowak, Jakub
The IOCG Sin Quyen deposit is located in the Red River shear zone of North Vietnam. The ore bodies are known as hydrothermal veins and are hosted in Proterozoic metapelite. A block modelling approach was used to build a 3D model of the ore bodies. An analysis was carried out on Surfer® 11 computer software using the archival data recorded from several dozen boreholes distributed within the study area, as well as data obtained from the mineral and chemical analysis of 50 samples collected recently in the deposit. The ore bodies generally trend in a NW-SE direction with an average azimuth of 107° and dip of around 70°. The Cu content in the ore bodies is inhomogeneous. In the bed extension direction, the exponential correlation of Cu concentration in ore bodies is recognized within 2,500 m, while in the direction perpendicular to the bed strike, the exponential dependence is observed on 500 m of distance. The high-grade mineralisation of copper within the ore bodies is often at the altitude interval from ∼100 m to ∼150 m above sea level (asl). These bodies are also rich in uranium and gold bearing minerals. The total resources of Cu, U and Ag were estimated and amount to 361,000; 12.7 and 11.87 tonnes respectively. The model indicates the downward extension of some ore bodies to below 300 m beneath the ground surface.
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 ,
3D marine cadastral system to support marine spatial planning implementation in Indonesia - a case study of Penanjung Bay, Indonesia
(Wydawnictwa AGH, 2023) Kurniawan, Agung; Pranowo, Widodo Setiyo; Hardjo, Karen Slamet; Santoso, Agus Iwan; Khakhim, Nurul; Purwanto, Taufik Hery; Setiyadi, Johar
The ocean is a formation that has a volume and consists of a surface layer of water, a column, and a bottom. Visualization of the sea on a digital map is important to support the acceleration of marine spatial planning (MSP), which is generally two-dimensional on a flat plane. A marine cadastre is defined as an instrument used in managing spatial boundaries, which describes, visualizes, and realizes legally defined boundaries as well as rights, restrictions, and responsibilities related to activities in the marine environment. Therefore, visualization in 3D will open a wider perspective than conventional maps. The 3D marine cadastral system was built using the Penanjung Bay pilot project and the QGIS2ThreeJS plugin with JavaScript. The results obtained can provide a 3D visualization of the position and boundaries for each component of the marine cadastre in Penanjung Bay with a broader picture of the sea spatial layout in the region.