Materiały konferencyjne
Permanent URI for this collectionhttps://repo.agh.edu.pl/handle/AGH/106359
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Item type:Presentation, Access status: Open Access , Harmonic resonances and subquantization in the hydrogen emission spectrumSuder, MarekAn alternative method for analyzing the hydrogen spectrum is presented, based on recording orbital energies as precise fractions, which allows the identification of harmonic relationships between lines not visible in standard rounded data. Among other things, an exact 3:1 relationship between the H(5→4) and H(20→10) lines is demonstrated. The fundamental unit of photon energy ε₀ and the corresponding subquantum unit [sQ] were introduced. All analyzed lines of the Lyman , Balmer , Paschen , and Brackett series (n ≤ 7, m ≤ 4) form a discrete resonant lattice with a modulus of ~18.64 GHz , suggesting the existence of a deeper harmonic organization of the spectrum. The method provides an analytical tool allowing for more precise organization of spectroscopic data and may find applications in high-resolution spectroscopy, astrophysics, and the analysis of fundamental physical constants.Item type:Presentation, Access status: Open Access , From skin patches to scaffolds with controlled electrical environment for cell growth: engineering surface properties of electrospun fibers(2024) Stachewicz, Urszula
Wydział Inżynierii Metali i Informatyki PrzemysłowejItem type:Presentation, Access status: Open Access , Identifying the origin of water appearances in salt mines using isotope-aided methodologies: new insights through combined analyses of water leakages and atmospheric water vaporPierchala, Anna; Duliński, Marek ; Gorczyca, Zbigniew; Różański, Kazimierz; Staszczak, Waclaw
Wydział Fizyki i Informatyki StosowanejUncontrolled water appearances in salt mines pose the largest hazard to their safe operation. Two major categories of water appearances in Polish salt mines were identified: (i) syngenetic brines associated with formation of salt deposits, and (ii) meteoric waters of infiltration origin [1]. Whereas the first category of waters is generally considered safe because they are fully saturated brines and usually occur in limited quantities, meteoric waters of infiltration origin pose serious danger to mines’ operation and need to be controlled. Isotope analyses of water appearances in Polish salt mines started in the early 1970s [1]. Although it soon became clear that ²H and ¹⁸O isotope contents in mine waters constitute a powerful tool for identification of their origin, there are still some problems with unambiguous classification of those waters, resulting mainly from their unknown interaction with mines’ atmosphere. We report here the results of a dedicated study focused on quantification of spatio-temporal variability of δ²H and δ¹⁸O in atmospheric moisture present in the Klodawa Salt Mine, the largest salt mine in Poland (production of ca. 6x10⁵ tons of salts annually). Autonomous units allowing collection of monthly composite samples of mines’ atmosphere have been installed at 7 representative localities inside the mine and operated for the period of 14 months. The units were also measuring temperature and relative humidity. The ²H and ¹⁸O isotope composition of water vapour in the collected air samples was measured in the laboratory using Picarro 2140-i CRDS analyzer. References: [1] Dulinski, M., Rozanski, K., Brudnik, K., Kolonko, P., Tadych, J., 2013. Isotope monitoring of water appearances in salt mines: The Polish experience. In. Natural Analogues for Safety Cases of Repositories in Rock Salt. Nuclear Energy Agency Report, NEA/RWM/R(2013)10, OECD, 123-131.Item type:Presentation, Access status: Open Access , Single Photon Counting X-ray Detector with 25 um Pixel PitchGryboś, Paweł; Kłeczek, Rafał; Kmon, Piotr; Otfinowski, Piotr
Wydział Elektrotechniki, Automatyki, Informatyki i Inżynierii BiomedycznejThis paper presents the design and measurement results of a prototype integrated circuit called PIX25 for the readout hybrid pixel detectors operating in Single Photon Counting (SPC) mode. The IC is designed in the CMOS 40 nm process and its core is the matrix of 128 × 128 pixels. Usually, the pixel pitch in the SPC hybrid detector systems is in the range of 100 um down to 50 um. In the presented PIX25 IC the pixel pitch is only 25 um, which allows an increase in the position spatial resolution of the hybrid pixel detector and count rate per unit detector area beyond the state-of-the-art. Each pixel consists of a fast charge-sensitive amplifier with a detector leakage compensation circuit, a discriminator with a controlled threshold level, and 20-bit counters. To reduce the effects of pixel-to-pixel mismatch, each pixel contains independent blocks for offset and gain precise trimming. An important feature of the IC is its high reconfigurability. Each pixel can operate with the detector collecting holes or electrons. Thanks to the wide range of bias currents control the trade-off among power consumption, count rate, and noise performance can be obtained for a desired application. Additionally, the IC can be connected to sensors with a pixel pitch that is a multiplication of 25 um (e.g. 25 um, 50 um, 75 um, etc.). For operation with the detector pixel pitch of 50 um or higher any non-operating blocks/pixels in the readout matrix can be switched off, while their currents can be reused by working blocks/pixels only. Also each readout pixel can use up to 4 discriminators and 4 counters with different threshold settings.Item type:Presentation, Access status: Open Access , The influence of furfuryl resin type – classical and designed for sand 3D printing, on cast iron castings microstructure and surface roughness(2025) Major-Gabryś, Katarzyna; Halejcio, Dawid; Fijołek, Andrzej; Marosz, Jan; Górny, Marcin
Wydział OdlewnictwaThis conference abstract shows the results achieved within NetCastPL4.0 project. The project is being realized in cooperation between AGH Faculty of Foundry Engineering (Leader), CNR-ICMATE and Aalto University School of Engineering. This work, presented during the V International Conference of Casting and Materials Engineering ICCME 25 in Krakow, Poland on October 27-28, 2025, describes the research on molding sands for molds and cores 3D printing. The work concerns the influence of furfuryl resin type (classical and designed for 3D printing) on cast iron castings properties. The pouring parameters were elaborated on the basis of MAGMA software. The microscopic observations of castings, produced in classical and 3D printed molds were conducted as well as roughness of the samples assessment.Item type:Presentation, Access status: Open Access , The use of green molding materials in the production of advanced lightweighting castings(2025) Major-Gabryś, Katarzyna; Drożyński, Dariusz; Górny, Marcin; Marosz, Jan; Lelito, Janusz
Wydział OdlewnictwaThis conference abstract shows the results achieved within NetCastPL4.0 project. The project is being realized in cooperation between AGH Faculty of Foundry Engineering (Leader), CNR-ICMATE and Aalto University School of Engineering. This work, presented during the V International Conference of Casting and Materials Engineering ICCME 25 in Krakow, Poland on October 27-28, 2025, describes the research connected with the development of molding compounds for thin-walled castings. Two compounds with organic binders and two compounds with inorganic binders of self-curing molding sands were tested. Tests were carried out on the tensile and bending strength, permeability, and friability of the compounds. For selected molding sands, tests were carried out on their thermophysical properties (hot distortion parameter), gas emission, and thermal degradation. For castings production also molds produced using additive manufacturing (3D printing technology) were used.Item type:Presentation, Access status: Open Access , The use of green molding materials in the production of advanced lightweighting castingsMajor-Gabryś, Katarzyna; Drożyński, Dariusz; Górny, Marcin; Marosz, Jan; Lelito, Janusz
Wydział OdlewnictwaThis conference presentation shows the results achieved within NetCastPL4.0 project (Title: Networking for advancing excellence and capacity in light-weight castings for Foundry 4.0 in Poland - NetCastPL4.0; ID: 101159771; Program: Horizon Europe; Funder: Komisja Europejska (KE)). The project is being realized in cooperation between AGH Faculty of Foundry Engineering (Leader), CNR-ICMATE and Aalto University School of Engineering. This work, presented during the V International Conference of Casting and Materials Engineering ICCME 25 in Krakow, Poland on October 27-28, 2025, describes the research connected with the development of molding compounds for thin-walled castings. Two compounds with organic binders and two compounds with inorganic binders of self-curing molding sands were tested. Tests were carried out on the tensile and bending strength, permeability, and friability of the compounds. For selected molding sands, tests were carried out on their thermophysical properties (hot distortion parameter), gas emission, and thermal degradation. For castings production also molds produced using additive manufacturing (3D printing technology) were used.Item type:Presentation, Access status: Open Access , Selection of chemically cured molding sands’ with inorganic binders dedicated to 3D sand printing(2025) Halejcio, Dawid; Major-Gabryś, Katarzyna
Wydział OdlewnictwaThis conference abstract shows the results achieved within NetCastPL4.0 project. The project is being realized in cooperation between AGH Faculty of Foundry Engineering (Leader), CNR-ICMATE and Aalto University School of Engineering. The work presented during XXXI. medzinárodnej vedeckej konferencie slovenských, českých a poľských zlievačov SPOLUPRACA 2025 in Rajecke Teplice (Slovak Republik) determined the influence of molding sands’ with different inorganic binders composition on their chosen properties. The molding sands with 3 commercial inorganic binders used in traditional mold and core production technologies were tested as well as the molding sands dedicated to 3D printing with new binders based on them. Four types of hardener were used for chemical curing.Item type:Presentation, Access status: Open Access , Environmentally friendly foundry molding sands as a part of Green Deal policy(2025) Major-Gabryś, Katarzyna
Wydział OdlewnictwaThis conference abstract shows the results achieved within NetCastPL4.0 project. The project is being realized in cooperation between AGH Faculty of Foundry Engineering (Leader), CNR-ICMATE and Aalto University School of Engineering. The work presented during XXXI. medzinárodnej vedeckej konferencie slovenských, českých a poľských zlievačov SPOLUPRACA 2025 in Rajecke Teplice (Slovak Republik) aimed analyzing modern solutions for molding sands, both with organic and inorganic binders. In molding sands with organic binders, the innovative approach of replacing part of the binder with biodegradable additives reduces the harmfulness of molding sand at the stage of casting production a solution, molding sands with organic binders based on modified with furfuryl alcohol resins cured by hardeners with reduced sulfur content, molding technologies with alkyd resins hardened by catalyst based on isocyanates and alkaline phenolic resin hardened by esters. Molding sands with environmentally friendly inorganic binders based on sodium silicates and aluminosilicates were also analyzed.Item type:Presentation, Access status: Open Access , Effect of binder type on properties of molding sands dedicated to 3D printing(2025) Major-Gabryś, Katarzyna; Halejcio, Dawid
Wydział OdlewnictwaThis conference abstract shows the results achieved within NetCastPL4.0 project. The project is being realized in cooperation between AGH Faculty of Foundry Engineering (Leader), CNR-ICMATE and Aalto University School of Engineering. The work presented during ECIG 2025 European Cast Iron Group Meeting 2025 on 29 April 2025 in Milan presented the influence of binder type on the properties of molding sands, including sands dedicated to 3D printing. The authorsdemonstrated the possibility of replacing environmentally harmful organic binders with inorganic binders. Various technologies for binding molding compounds were presented, including chemical, thermal (also microwave) or combined binding. The effects of different binders on the strength, permeability, abrasion of the tested sands were presented, as well as their influence on the kinetics of binding or thermal deformation.