TESTS OF HTS 2G SUPERCONDUCTING TAPES USING THE LABVIEW ENVIRONMENT

HTS 2G superconducting tapes without stabilizer are used for the construction of superconducting fault current limiters. The characteristics R =f(T) of the superconducting tape is essential for design of superconducting current limiters and analysis of their numerical models. The article presents the experimentally determined characteristics R=f(T) of the second generation superconducting tapes SF4050 and SF12050 using the LabVIEW integrated environment. The article describes the method of sample preparation and methodology of testing of HTS 2G superconducting tapes. The LabVIEW integrated environment was used for the testing, thanks to which it was possible to download, process and save measurement data

Multilingualism in Greater Poland court records (1386-1448): tagging discourse boundaries and code-switching

No abstract available

Environmental Aspects of the Use of CNG in Public Urban Transport

This chapter concerns the problem of assessing the exhaust emission from the engines of city transport buses fuelled by CNG. It presents a comparative analysis of toxic exhaust emissions of CO, HC, NOx and PM, from urban buses powered by diesel and CNG. The measurements were carried out over the SORT standardised cycles as well as during a real drive condition on a city bus route. The research revealed that CNG bus generates significantly lower NOx emission, whereas its CO and HC emissions are higher. Taking into account low PM emissions, CNG buses should be regarded as eco-friendly means of public transport

WYZNACZANIE CHARAKTERYSTYK R = F(T) TAŚM NADPRZEWODNIKOWYCH PIERWSZEJ I DRUGIEJ GENERACJI

The experimental characteristics R = f(T) of the first (1G) and the second (2G) generation HTS tapes are presented in this paper. The paper describes samples preparation of 1G and 2G superconducting tapes, describes the measurement method and the results of experimental studies.W artykule przedstawiono eksperymentalnie wyznaczone charakterystyki R = f(T) taśm nadprzewodnikowych pierwszej (1G) i drugiej generacji (2G). W pracy opisano sposób przygotowania próbek taśm nadprzewodnikowych 1G i 2G do badań, opisano metodę pomiarową oraz przedstawiono wyniki badań eksperymentalnych

Novel approach to sample preconcentration by solvent evaporation in flow analysis

A preconcentration module operated in flow mode and integrated with a sequential injection system with spectrophotometric detection was developed. Using the system, preconcentration was performed in continuous mode and was based on a membraneless evaporation process under diminished pressure. The parameters of the proposed system were optimized and the system was tested on the example of the spectrophotometric determination of Cr(III). The preconcentration effectiveness was determined using the signal enhancement factor. In the optimized conditions for Cr(III), it was possible to obtain the signal enhancement factors of around 10 (SD: 0.9, n = 4) and determine Cr(III) with precision and intermediate precision of 8.4 and 5.1% (CV), respectively. Depending on the initial sample volume, signal enhancement factor values of about 20 were achieved. Applicability of the developed preconcentration system was verified in combination with the capillary electrophoresis method with spectrophotometric detection on the example of determination of Zn in certified reference materials of drinking water and wastewater. Taking into account the enhancement factor of 10, a detection limit of 0.025 mg L−1 was obtained for Zn determination. Zn was determined with precision less than 6% (CV) and the results were consistent with the certified values

Helicobacter pylori cytotoxin-associated gene A virulence and its association with the epithelial-mesenchymal transition in gastric cancer

Gastric cancer is currently one of the most prevalent malignancies worldwide with a high mortality rate. Helicobacter pylori (H. pylori) infection significantly contributes to the onset and progression of gastric cancer mainly due to the induction of chronic inflammatory responses. The pathogenicity of H. pylori is associated with a vast number of virulence factors among which cytotoxin-associated gene A (CagA) plays a crucial role. We conducted a literature review of PubMed, Web of Science, and Scopus on September 1st, 2021. There were no limits regarding the year and the language of publication. Articles included in this review concerned human and animal studies. The following search string was applied during the search: (gastric cancer) AND (epithelial-mesenchymal transition) AND (Helicobacter pylori) AND (cytotoxin-associated gene A). The final analysis included 135 articles independently reviewed by the authors. H. pylori CagA-positive strains seem to be more virulent compared to the CagA-negative strains. CagA pathogenicity includes the increased secretion of pro-inflammatory cytokines, induction of cancer stem cell-like properties, apoptosis prevention, or overactivation of particular oncogenic pathways. H. pylori might induce epithelial-mesenchymal transition (EMT) via numerous pathways, among which CagA-related pathogenicity is considered to be of high significance. Mechanisms associated with CagA action are involved in the maintenance of chronic H. pylori infection, subsequent EMT induction, and further onset and progression of gastric cancer. Because of a huge number of H. pylori strains with different virulence mechanisms, the clinical outcome of patients is also associated with the particular type of strain that infected a patient

System wieloaspektowej analizy ksiąg urodzeń, małżeństw i zgonów (na przykładzie parafii Osieczna, lata 1794 – 1874)

Pozna

MRI in the evaluation of the azoospermic male

PURPOSEWe aimed to show the usefulness of magnetic resonance imaging (MRI) in the evaluation of infertile men and its ability to distinguish obstructive from nonobstructive azoospermia. METHODSBetween April 2015 and February 2018, 45 azoospermic men underwent scrotal MRI. We evaluated the images with an emphasis on signal characteristics of the testis and morphologic changes typical for obstruction. Testicular volume (TV), apparent diffusion coefficient (ADC) value, T1 and T2 signal ratios (testis/muscle) were measured for every testis. On the basis of histologic results, patients were divided into two groups: obstructive azoospermia (OA) and nonobstructive azoospermia (NOA).RESULTSTestes of patients in the OA group had significantly lower ADC values (mean 0.876±101 ×10-3 mm2/s) than in the NOA group (mean, 1.114±147 ×10-3 mm2/s). TV was significantly higher in patients with OA (median, 17.61 mL; range, 11.1–38.4 mL) than in those with NOA (median, 10.5 mL; range, 5.2–22.2 mL). ROC analysis showed that both TV and ADC values were highly predictive for distinguishing between OA and NOA patients, with an area under the ROC curve of 0.82 and 0.92 respectively. A cutoff value of ≥12.4 mL could distinguish obstructive from nonobstructive azoospermia with a sensitivity of 92% and specificity of 63%, whereas for ADC measurements a cutoff value of ≥0.952 ×10-3 mm2/s exhibited a sensitivity of 81% and specificity of 90% There was no statistically significant difference in T1 and T2 signal ratios between both groups. Abnormalities typical for obstruction of the male reproductive tract (e.g., dilatation of ejaculatory ducts, prostatic or seminal vesicle cysts) were found in 78% of patients (14/18) in the obstructive group.CONCLUSIONScrotal MRI is a very effective tool for the evaluation of azoospermic men and may provide important information facilitating interventional treatment of infertility

System SINUS – otwarte narzędzie do budowy bibliograficznych baz danych

The aim of this paper is to present new open tool for building bibliographic databases. SINUS system, developed by Poznań Supercomputing and Networking Center, was initially created to fulfill the needs related to management of scientific publications of Poznań University of Technology staff. In the paper we present basic functional assumptions of the system, its current functionality and future development directions

System SINUS – otwarte narzędzie do budowy bibliograficznych baz danych

Streszczenie: Celem artykułu jest przedstawienie nowego, otwartego narzędzia do budowy bibliograficznych baz danych. System SINUS, opracowany w Poznańskim Centrum Superkomputerowo-Sieciowym (PCSS), powstał pierwotnie na potrzeby zarządzania danymi o publikacjach naukowych pracowników Politechniki Poznańskiej (PP). W referacie omówione są podstawowe założenia, jakie przyświecały twórcom systemu, jego funkcjonalność oraz dotychczasowe wykorzystanie, a także dalsze kierunki rozwoju.Abstract: The aim of this paper is to present new open tool for building bibliographic databases. SINUS system, developed by Poznań Supercomputing and Networking Center, was initially created to fulfill the needs related to management of scientific publications of Poznań University of Technology staff. In the paper we present basic functional assumptions of the system, its current functionality and future development directions