Nowe zasoby w Repozytorium PK http://suw.biblos.pk.edu.pl/ Biblioteka Politechniki Krakowskiej lipinska@biblos.pk.edu.pl 60 <![CDATA["Official" and "private" parks of the XVIII–XIX centuries through the prism of general landscape trends of the time]]> Mon, 05 Dec 2022 14:22:10 +0100 Ivashko, Yulia; Dmytrenko, Andrii; Hryniewicz, Małgorzata; Petrunok, Tetiana; Yevdokimova, Tetiana
rodzaj: artykuł w czasopiśmie
Abstrakt: The article analyzes the basic principles of landscape design of the imperial and aristocratic parks in the Russian Empire in the XVIII–XIX centuries. There were "official" parks designed to be visited by high-ranking guests, and "private" parks, which were not covered by the canons of the "official" park. In the Tsarskoye Selo imperial residence Catherine's Park performed the function of "official" with the appropriate function of pomp, and located next to it Alexander's Park –respectively, the function of "private" imperial park. Catherine's Park became a model to follow one of the mostfamous parks in modern Ukraine –Oleksandriia Park in the city of Bila Tserkva. The common and different between Tsarskoye Selo park residence and aristocratic parks in Ukraine are analyzed, the principles of planning of these parks and the main constituent elements are compared. Based on this, the basic principles of planning parks of the Classicism and Empire style era in Ukraine and the "iconic" set of pavilions are determined. The general canons of the "Ossian Park" and their specific embodiment are analyzed on the example of Sofiivka Park in Uman. It was determined that the "Ossian Park" based on the canons is opposite to the parks of Classicism-Empire style.The methods of historical and culturological analysis, method of comparative analysis, method of field surveys used.]]>
<![CDATA[Characteristics of filling material fixed with fly ash]]> Mon, 05 Dec 2022 12:23:56 +0100 Żelazny, Sylwester; Nowak, Anna
rodzaj: rozdział/fragment książki
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<![CDATA[The theory of exploitation as a support for management accounting in an enterprise]]> Mon, 05 Dec 2022 12:08:07 +0100 Drożyner, Przemysław; Młynarski, Stanisław
rodzaj: artykuł w czasopiśmie
Abstrakt: In each company operating on the market, various business processes are implemented: production, logistics, warehouse, marketing, HR and payroll and many others. In enterprises with a high organizational culture, these processes are always measured; various indicators related to the effectiveness and efficiency of these processes are measured and analyzed, and on this basis management decisions are made for the entire enterprise. The aim of this work was to verify the assumption that by properly defining the process of “exploitation” of technical objects (understood as the combination of the processes of operation and maintenance), it is possible to obtain information not only about the effectiveness of this process itself, but also about other business processes carried out in companies. For this purpose, the so-called “exploitation states” characteristic of technical objects used in two different types of small enterprises, i.e., mechanical workshops and taxi enterprises, were defined. Then, in two such workshops and three taxi companies, the time spent by the objects in defined states was measured, and the results were analyzed. We found significant differences in these values even for companies of a similar size and nature. After discussing the results with the owners of the companies, it was found that the differences resulted from different visions of the functioning of each company and—which is very important—their context. In the following, it was shown that properly defining and measuring the exploitation states of technical objects can be useful for improving not only “technical” processes but also most of the business processes carried out in enterprises.]]>
<![CDATA[Understanding the regioselectivity and the molecular mechanism of [3 + 2] cycloaddition reactions between nitrous oxide and conjugated nitroalkenes: a DFT computational study]]> Mon, 05 Dec 2022 08:51:47 +0100 Dresler, Ewa; Wróblewska, Aneta; Jasiński, Radomir
rodzaj: artykuł w czasopiśmie
Abstrakt: Regiochemical aspects and the molecular mechanism of the [3 + 2] cycloaddition between nitrous oxide and conjugated nitroalkenes were evaluated on the basis of the wb97xd/6-311 + G(d) (PCM) computational study. It was found that, independently of the nature of the nitroalkene, all considered processes are realized via polar, single-step mechanisms. All attempts at the localization of hypothetical zwitterionic intermediates were unsuccessful. Additionally, the DFT computational study suggested that, in the course of the reaction, the formation of respective Δ2-4-nitro-4-R1-5-R2-1-oxa-2,3-diazolines was preferred from the kinetic point of view.]]>
<![CDATA[Myślenie racjonalistyczne w architekturze]]> Fri, 02 Dec 2022 13:42:39 +0100 Mielnik, Anna
rodzaj: rozdział/fragment książki
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<![CDATA[On the question of the formation of nitro-functionalized 2,4-pyrazole analogs on the basis of nitrylimine molecular systems and 3,3,3-trichloro-1-nitroprop-1-ene]]> Fri, 02 Dec 2022 13:31:16 +0100 Kula, Karolina; Łapczuk, Agnieszka; Sadowski, Mikołaj; Kras, Jowita; Zawadzińska, Karolina; Demchuk, Oleg M.; Gaurav, Gajendra Kumar; Wróblewska, Aneta; Jasiński, Radomir
rodzaj: artykuł w czasopiśmie
Abstrakt: Experimental and theoretical studies on the reaction between (E)-3,3,3-trichloro-1-nitroprop-1-ene and N-(4-bromophenyl)-C-arylnitrylimine were performed. It was found that the title process unexpectedly led to 1-(4-bromophenyl)-3-phenyl-5-nitropyrazole instead of the expected Δ2-pyrazoline molecular system. This was the result of a unique CHCl3 elimination process. The observed mechanism of transformation was explained in the framework of the molecular electron density theory (MEDT). The theoretical results showed that both of the possible channels of [3 + 2] cycloaddition were favorable from a kinetic point of view, due to which the creation of 1-(4-bromophenyl)-3-aryl-4-tricholomethyl-5-nitro-Δ2-pyrazoline was more probable. On the other hand, according to the experimental data, the presented reactions occurred with full regioselectivity.]]>
<![CDATA[Nano i mikrocząstki polimerów obecne w stabilizacie z odpadów, przeszkodą GOZ]]> Fri, 02 Dec 2022 12:09:02 +0100 Grąz, Katarzyna; Gronba-Chyła, Anna; Generowicz, Agnieszka; Kwaśny, Justyna
rodzaj: materiały konferencyjne w książce
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<![CDATA[Zawartość pyłu zawieszonego w odpadach z czyszczenia ulic i chodników]]> Fri, 02 Dec 2022 12:00:59 +0100 Gronba-Chyła, Anna; Grąz, Katarzyna; Generowicz, Agnieszka
rodzaj: materiały konferencyjne w książce
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<![CDATA[Wykorzystanie narzędzi informatycznych w GOZ]]> Fri, 02 Dec 2022 11:36:59 +0100 Mala, Marcin; Generowicz, Agnieszka
rodzaj: materiały konferencyjne w książce
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<![CDATA[Bond behaviour of seven-wire non-pretensioned plain strands embedded in high-performance concrete]]> Fri, 02 Dec 2022 10:50:35 +0100 Seruga, Andrzej
rodzaj: materiały konferencyjne w książce
Abstrakt: The bond of prestressing strands can vary with regard to the size of strand, the type of concrete mixture, the age and strength of concrete and many other factors. The bond level is significant for composite action between the concrete and steel, especially in the transfer zone of the pretensioned member. Tensioning force release can usually be performed when obtaining a minimal concrete compressive strength at the level of 40 MPa. Such a strength is required for a concrete maturity of twenty-four hours or less, which is not easy. With help comes the application of modern high-performance concrete (HPC) technology. A research program to examine the bond of HPC on the concrete composition grade of C80/95 was designed. The concrete specimens with untensioned 7ɸ4 mm (12,9 mm dia.), 7ɸ5 mm (15,7 mm dia.) and 7ɸ6 mm (18,2 mm dia.) strands were precast in individual moulds. Six strandembedment lengths were tested: 40, 80, 120, 240, 330 and 460 mm. The main tests concerned measurements of slip between the strand and the concrete surface and were made with using an electronic extensometer attached to the free end of strand and concrete surface. The bond stressslip curves and bond strength versus free-end slip relationship was analysed. All specimens were tested in the laboratory of the Institute of Materials and Building Structures of Cracow University of Technology, Cracow, Poland.]]>
<![CDATA[Student competition supported by lectures from concrete technology experts as a multi-faceted teaching method]]> Fri, 02 Dec 2022 10:37:06 +0100 Mielnik, Anna
rodzaj: rozdział/fragment książki
Abstrakt: The study work aims to present a teaching method introduced in the design task for second-year undergraduate students in the Department of Architectural Composition at Cracow University of Technology in the form of a competition entitled ‘Concrete Architecture – Play of Solids – House in the Landscape’ co-organised with the Association of Cement Producers. Over the years of competition, it has been noticed that aspects related to the matter and technology of concrete pose great difficulty to the students. To equip students with the tools to understand concrete architecture, lectures given by experts in concrete technology and contracting have been organised to familiarise them with actual issues related to architectural concrete technology, both in purely theoretical and primarily practical terms. The method introduced has resulted in increased student awareness of this technology, an increase in the technical level of competition entries, and a creative approach to designing concrete matter.]]>
<![CDATA[Measurement and diagnosis of comfort in a historic building]]> Fri, 02 Dec 2022 10:18:48 +0100 Fedorczak-Cisak, Małgorzata; Kowalska-Koczwara, Alicja; Nering, Krzysztof; Pachla, Filip; Radziszewska-Zielina, Elżbieta; Stecz, Piotr; Tatara, Tadeusz; Jeleński, Tomasz
rodzaj: artykuł w czasopiśmie
Abstrakt: Historic buildings constitute a specific group of buildings where the possibilities of improving energy efficiency and comfort are significantly limited because of the existing construction features and heritage values. Each building has a different history so the scope of renovation and/or retrofitting must be determined individually for each building. This article presents the methodology of measurement and diagnosis of features of particular importance for energy performance and comfort improvements, based on the example of a historic masonry building located in southern Poland. The first research question was which of the comfort conditions have been exceeded according to measurements. The second issue concerned the necessary extension of the basic determinants of comfort, beyond measurable qualities. A multi-faceted approach to the comfort assessment is proposed, including qualitative research that applies the additional criterion of aesthetic comfort. During the case study diagnosis, the acceptable level was exceeded in thermal, acoustic and aesthetic comfort. The first two may be addressed by optimized technical measures whilst the latter through a research-through-design that addresses the complex relationship between the perceiver and what the environment affords. The solution reflects the need to meet demands for retrofits that are energy-efficient and aesthetically pleasing while minimizing any negative impacts on the heritage and the environment.]]>
<![CDATA[Concrete architecture workshops for students as a way to Project-Based Learning]]> Fri, 02 Dec 2022 10:07:46 +0100 Kozłowski, Tomasz
rodzaj: rozdział/fragment książki
Abstrakt: The author tries to describe a modification of the teaching approach during workshops conducted at the Faculty of Architecture at Cracow University of Technology. One of the reasons for the change was to improve the quality of education. During the development of projects, students usually use theoretical knowledge found in books and copy designs from architects. A lack of realism or understanding of concrete technology has been noticed. The change in the organisation of the workshops described in the study consisted of introducing project realization as a successive stage in teaching. The students were to make a concrete throne. The primary objective was the transition from theoretical to practical teaching. The change forced participants to take a different and more creative approach to designing a small architectural work and to use a specific material. The transformation of the theme enabled them to acquire new skills other than those in paper-based academic works.]]>
<![CDATA[Marchew zwyczajna (Daucus carota L.) jako źródło substancji aktywnych i jej potencjał farmakologiczny i kosmetologiczny]]> Fri, 02 Dec 2022 09:30:43 +0100 Kulawik-Pióro, Agnieszka
rodzaj: artykuł w czasopiśmie
Abstrakt: Daucus carota L. – the carrot is an orange vegetable recognized all over the world, belonging to the Apiaceae family, used in medicine since ancient times. In Poland, wild Daucus carota L. subsp. carota and the cultivated species Daucus carota L. subsp. sativus (Hoffm.) Arcang. var. sativus Hoffm (orange-colored carrot), and Daucus carota L. subsp. sativus (Hoffm.) Arcang. var. atrorubens Alef called black carrot can be distinguished. Carrot roots, leaves, flowers, and seeds are widely used in food, pharmaceutical, and cosmetic purposes as they are a source of macro and micronutrients. They contain many valuable phytonutrients such as carotenoids, derivatives of hydroxycinnamic acid, alkaloids, flavonoids, phenols, flavonols, flavones, and terpene compounds. They are used to obtain oil, extracts, macerates, essential oils, as well as pure chemical compounds from the carotenoid group. The aim of this review was to present and summarize the knowledge on the chemical composition of individual parts of carrots and the biological activity of the main raw materials obtained from Daucus carota L. Attention was also paid to their possible applications in cosmetology and safety of use. For this purpose, the botanical-anatomicalecological characteristics of the species Daucus carota were presented. The chemical composition of carrot roots, leaves, and seeds is discussed. The essential oil was characterized both in terms of its chemical composition and biological activity. The methods of obtaining oil from seeds, its physicochemical properties, and the composition of fatty acids are presented. The whole is closed with a list of carrot cosmetic raw materials available on the market. According to the CosIng database, cosmetic raw materials include extracts, hydrolats, essential oils, juices, cell cultures, protoplasts, and hydrolysates. These raw materials were characterized by their INCI names, type of action, purpose, and type of products in which they are often used. The variety of raw materials obtained from Daucus carota and their high biological activity caused by the presence of such compounds as carotol, α-pinene, β-caryophyllene, sabinene, caryophyllene oxide, geranyl acetate gives a wide range of D. carota applications and also make it a popular and valued vegetable for many industries, including the pharmaceutical, food and cosmetic.]]>
<![CDATA[Corrigendum to “Theory and highly accurate computation of nonlimiting chronoamperometric currents for the ErevCirr reaction mechanism at cylindrical wire electrodes” [J. Electroanal. Chem. 895 (2021) 115410]]]> Thu, 01 Dec 2022 14:45:05 +0100 Bieniasz, L. K.
rodzaj: artykuł w czasopiśmie
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<![CDATA[Analiza lokalnej pracy zarysowanego naroża płyty sprężonego obiektu mostowego w dużym skosie w aspekcie wpływu obciążeń eksploatacyjnych]]> Thu, 01 Dec 2022 12:44:28 +0100 Betlej, Michał; Ciurej, Henryk; Gwoździewicz, Piotr
rodzaj: artykuł w czasopiśmie
Abstrakt: Przedmiotem analizy jest nietypowy rzeczywisty obiekt mostowy płytowo-belkowy sprężony w skosie ok. 40°. Po sprężeniu dźwigarów zauważono istnienie pęknięcia w obrębie kątów ostrych na górnej i dolnej powierzchni płyty pomostu. W artykule przedstawiono wyniki analizy lokalnej pracy zarysowanych naroży w rejonie kąta ostrego płyty w aspekcie wpływu obciążeń użytkowych na istniejący stan zarysowań. Opracowano model przestrzenny MES, bazujący w całości na elementach objętościowych. Siatki zbrojenia odwzorowano w postaci płaskich membran o zastępczych właściwościach anizotropowych. Zastosowano obliczenia nieliniowe fizycznie i geometrycznie z modelem pękania betonu. Odtworzono proces i sekwencję sprężania kablami oraz przykładanie pozostałych obciążeń: stałych i użytkowych w trzech ustawieniach. Na każdym etapie obserwowano stan naprężeń i pękania w płycie. Sformułowano wniosek, że rysy powstałe wskutek niewłaściwego wprowadzenia sprężenia zamykają się pod wpływem obciążeń stałych i użytkowych.]]>
<![CDATA[Efficient lightweight multimodel deep fusion based on ECG for arrhythmia classification]]> Thu, 01 Dec 2022 12:29:16 +0100 Hammad, Mohamed; Meshoul, Souham; Dziwiński, Piotr; Pławiak, Paweł; Elgendy, Ibrahim A.
rodzaj: artykuł w czasopiśmie
Abstrakt: An arrhythmia happens when the electrical signals that organize the heartbeat do not work accurately. Most cases of arrhythmias may increase the risk of stroke or cardiac arrest. As a result, early detection of arrhythmia reduces fatality rates. This research aims to provide a lightweight multimodel based on convolutional neural networks (CNNs) that can transfer knowledge from many lightweight deep learning models and decant it into one model to aid in the diagnosis of arrhythmia by using electrocardiogram (ECG) signals. Thus, we gained a multimodel able to classify arrhythmia from ECG signals. Our system’s effectiveness is examined by using a publicly accessible database and a comparison to the current methodologies for arrhythmia classification. The results we achieved by using our multimodel are better than those obtained by using a single model and better than most of the previous detection methods. It is worth mentioning that this model produced accurate classification results on small collection of data. Experts in this field can use this model as a guide to help them make decisions and save time.]]>
<![CDATA[Cellular automaton mimicking colliding bodies for topology optimization]]> Thu, 01 Dec 2022 12:22:03 +0100 Bochenek, Bogdan; Tajs-Zielińska, Katarzyna
rodzaj: artykuł w czasopiśmie
Abstrakt: Needs and demands of contemporary engineering stimulate continuous and intensive development of design methods. Topology optimization is a modern approach which has been successfully implemented in a daily engineering design practice. Decades of progress resulted in numerous applications of topology optimization to many research and engineering fields. Since the design process starts already at the conceptual stage, innovative, efficient, and versatile topology algorithms play a crucial role. In the present study, the concept of the original heuristic topology generator is proposed. The main idea that stands behind this proposal is to take advantage of the colliding bodies phenomenon and to use the governing laws to derive original Cellular Automata rules which can efficiently perform the process of optimal topologies generation. The derived algorithm has been successfully combined with ANSYS, a commercial finite element software package, to illustrate its versatility and to make a step toward engineering applications. Based on the results of the tests performed, it can be concluded that the proposed concept of the automaton mimicking colliding bodies may be an alternative algorithm to other existing topology generators oriented toward engineering applications.]]>
<![CDATA[Modeling fatigue of pre-corroded body-centered cubic metals with unified mechanics theory]]> Thu, 01 Dec 2022 12:21:24 +0100 Lee, Hsiao Wei; Fakhri, Hamidreza; Ranade, Ravi; Basaran, Cemal; Egner, Halina; Lipski, Adam; Piotrowski, Michał; Mroziński, Stanisław
rodzaj: artykuł w czasopiśmie
Abstrakt: Corrosion is a common degradation problem in engineering structures. The unified mechanics theory (UMT) was used to develop a model to predict the fatigue life of pre-corroded steel samples with BCC structure. The model was also verified experimentally. For this purpose, A656-grade steel samples were immersed in a 5 wt% sodium chloride (NaCl) solution at a pH of 7. Electrochemical measurements were made with a potentiostat to monitor corrosion. Then, a series of ultrasonic vibration fatigue tests were conducted on these corroded samples at 20 kHz. UMT is ab-initio unification of the laws of Newton and the 2nd law of thermodynamics. Hence no empirical degradation/dissipation function is needed. However, the thermodynamic fundamental equation for metal corrosion and ultrasonic vibration must be analytically derived. The thermodynamic fundamental equation formulates all the entropy generation mechanisms during the corrosion and then during ultrasonic vibrations. The cumulative entropy generation was then used to calculate the Thermodynamic State Index (TSI), which starts at zero and asymptotically approaches one at failure. Hence, TSI predicts the life span. The proposed model results agree well with the experimental results, thus proving that the UMT-based model can predict the high cycle fatigue life of previously corroded samples accurately. Ó 2022 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license.]]>
<![CDATA[Life cycle assessment for the environmental impact assessment of a city’ cleaning system. The case of Cracow (Poland)]]> Thu, 01 Dec 2022 12:06:28 +0100 Generowicz, A.; Gronba-Chyła, A.; Kulczycka, J.; Harazin, P.; Gaska, K.; Ciuła, J.; Ocłoń, P.
rodzaj: artykuł w czasopiśmie
Abstrakt: In large urban agglomerations, the composition and amount of municipal waste are diversified and depend on the level of wealth, season, number of tourists, etc. In city strategies, there is a visible search for solutions that minimize the impact on the environment and optimize costs incurred by residents. One of the municipal waste streams is street sweepings, i.e. waste generated as a result of street cleaning processes, classified under the code 200303 and is not treated as hazardous waste. Their quantity, quality, and seasonal variability have an impact on the natural environment, including air quality. Their removal reduces the amount of PM10 and PM 2.5. They are usually disposed of the landfills. In Cracow, where air emissions have been successfully reduced in recent years via different actions, experimental studies were carried out on the impact of mechanical street cleaning on air quality, and methods of their management were discussed. The article analyzes various technological solutions based on the LCA (Life Cycle Assessment) methodology for assessing the environmental impact of technologies and waste generated in the processes of street cleaning in urbanized areas. It is used to assess the impact of individual products, technologies, strategies or systems on the environment, taking into account emissions “from the cradle to the grave”. In the latest documents of the European Commission, the LCA method is recommended for the analysis of environmental performance measurement in the life cycle of products and organizations. The presented calculations in the SimaPro software showed that for the adopted assumptions, on the example of a selected street section, it is possible to reduce the impact by 5 times, as a result of city cleaning processes. The calculations take into account the consumption of water, fuel, and the operation of the machinery as well as the management of sweeping waste and wastewater treatment. The process of managing this type of waste reduces emissions related mainly to toxic effects for humans (carcinogenic and non-carcinogenic effects), reduction of solid particles and ecotoxicity for freshwater. Comparing the analyzed scenarios (scenario 1 - after cleaning the city and scenario 0 - before), scenario 1 is characterized by a much lower impact on the environment. Although there are loads in this scenario 1 in each impact category of EF 3.0, the overall result is still lower than in all scenarios 0 options. In scenario 1, the environmental impact mainly relates to the freshwater ecotoxicity, ionizing radiation and climate change categories, which are qualitatively different. From scenario 0, where the greatest environmental impact is in the particulate matter category.]]>
<![CDATA[Creativity in architecture, painting and graphic arts – selected aspects of its perception, and the rational and emotional approach]]> Thu, 01 Dec 2022 09:16:14 +0100 Makowska, Beata
rodzaj: rozdział/fragment książki
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<![CDATA[Accuracy verification of surface models of architectural objects from the iPad LiDAR in the context of photogrammetry methods]]> Wed, 30 Nov 2022 14:52:06 +0100 Łabędź, Piotr; Skabek, Krzysztof; Ozimek, Paweł; Rola, Dominika; Ozimek, Agnieszka; Ostrowska, Ksenia
rodzaj: artykuł w czasopiśmie
Abstrakt: The creation of accurate three-dimensional models has been radically simplified in recent years by developing photogrammetric methods. However, the photogrammetric procedure requires complex data processing and does not provide an immediate 3D model, so its use during field (in situ) surveys is infeasible. This paper presents the mapping of fragments of built structures at different scales (finest detail, garden sculpture, architectural interior, building facade) by using a LiDAR sensor from the Apple iPad Pro mobile device. The resulting iPad LiDAR and photogrammetric models were compared with reference models derived from laser scanning and point measurements. For small objects with complex geometries acquired by iPad LiDAR, up to 50% of points were unaligned with the reference models, which is much more than for photogrammetric models. This was primarily due to much less frequent sampling and, consequently, a sparser grid. This simplification of object surfaces is highly beneficial in the case of walls and building facades as it smooths out their surfaces. The application potential of the IPad LiDAR Pro is severely constrained by its range cap being 5 m, which greatly limits the size of objects that can be recorded, and excludes most buildings.]]>
<![CDATA[Development of chitosan/gelatin-based hydrogels incorporated with albumin particles]]> Wed, 30 Nov 2022 10:54:59 +0100 Bańkosz, Magdalena
rodzaj: artykuł w czasopiśmie
Abstrakt: The research subject of this paper are natural polymer-based hydrogels modified with albumin particles. The proteins were obtained via the salt-induced precipitation method, and next characterized using dynamic light scattering (DLS), UV-Vis spectroscopy and FT-IR spectroscopy. The most favorable composition showing monodispersity and particles with a size lower than 40 nm was selected for modification of hydrogels. Such systems were obtained via the photopolymerization performed under the influence of UV radiation using diacrylate poly(ethylene glycol) as a crosslinking agent and 2-hydroxy-2-methylpropiophenone as a photoinitiator. Next, the hydrogels’ swelling ability, mechanical properties, wettability and surface morphology were characterized. Moreover, FT-IR spectroscopy, incubation studies in simulated physiological liquids, pro-inflammatory activity analysis and MTT reduction assay with L929 murine fibroblasts were performed. The release profiles of proteins from hydrogels were also verified. Materials modified with proteins showed higher swelling ability, increased flexibility even by 50% and increased surface hydrophilicity. Hydrogels’ contact angles were within the range 62–69◦ while the tensile strength of albumin-containing hydrogels was approx. 0.11 MPa. Furthermore, the possibility of the effective release of protein particles from hydrogels in acidic environment (approximately 70%) was determined. Incubation studies showed hydrogels’ stability and lack of their degradation in tested media. The viability of fibroblasts was 89.54% for unmodified hydrogel, and approx. 92.73% for albumin-modified hydrogel, and such an increase indicated the positive impact of the albumin on murine fibroblast proliferation.]]>
<![CDATA[A study on accuracy of micro-holes drilled in Ti-6Al-4V alloy by using electrical discharge machining process]]> Wed, 30 Nov 2022 09:23:31 +0100 Machno, Magdalena; Trajer, Marcin; Bizoń, Wojciech; Czeszkiewicz, Adrian
rodzaj: artykuł w czasopiśmie
Abstrakt: Thermophysical properties of the Ti-6Al-4V titanium alloy make it difficult to process with electro discharge machining (EDM) process. The aim of this experimental work was to investigate manufacturing of micro-holes in titanium alloy by means of EDM . Further investigation the accuracy of drilled holes was performed in order to improve the EDM drilling method in this alloy. As a part of the research, the impact of four EDM process parameters on performance factors such as: material removal rate (MMR), linear tool wear (LTW) was verified in parallel to accuracy metrics of the micro-hole: radial overcut (ROC), cylindricity (CYL), recast layer thickness (RLT). The analysis of the obtained relationships showed that the properties of the Ti-6Al-4V alloy, such as low thermal conductivity, and low electrical conductivity significantly affect the EDM process efficiency. It is clearly visible through increased electrode wear, as well as the accuracy and quality reduction of the drilled holes. When analyzing the accuracy of the hollow micro-holes, it was observed that the highest current amplitude resulted in a smaller amount of microcracks in the layer around the hole entrance. The optimal process parameters to obtain a satisfactory geometry of micro-holes have been found such as: current amplitude 3.33–4.65 A, pulse time duration 550–1000 μs, open voltage 100 V, and tool rotation speed 300 rpm.]]>
<![CDATA[New, eco-friendly method for synthesis of 3-chlorophenyl and 1,1′-biphenyl piperazinylhexyl trazodone analogues with dual 5-HT1A/5-HT7 affinity and its antidepressant-like activity]]> Tue, 29 Nov 2022 14:52:36 +0100 Zaręba, Przemysław; Partyka, Anna; Latacz, Gniewomir; Satała, Grzegorz; Zajdel, Paweł; Jaśkowska, Jolanta
rodzaj: artykuł w czasopiśmie
Abstrakt: Serotonin 5-HT1A and 5-HT7 receptors play an important role in the pathogenesis and pharmacotherapy of depression. Previously identified N-hexyl trazodone derivatives, 2-(6-(4-(3-chlorophenyl)piperazin-1-yl)hexyl)-[1,2,4]triazolo[4,3-a]pyridin-3(2H)-one hydrochloride (7a·HCl), with high affinity for 5-HT1AR and 2-(6-(4-([1,1′-biphenyl]-2-yl)piperazin-1-yl)hexyl)-[1,2,4]triazolo[4,3-a]pyridin-3(2H)-one hydrochloride (7b·HCl), a dual-acting 5-HT1A/5-HT7 receptor ligand, were prepared with a new microwave-assisted method. The protocol for the synthesis of 7a and 7b involved reductive alkylation under a mild reducing agent. We produced the final compounds with yield of 56–63% using ethanol or 51–56% in solvent-free conditions in 4 min. We then determined the 5-HT7R binding mode for compounds 7a and 7b using in silico methods and assessed the preliminary ADME and safety properties (hepatotoxicity and CYP3A4 inhibition) using in vitro methods for 7a·HCl and 7b·HCl. Furthermore, we evaluated antidepressant-like activity of the dual antagonist of 5-HT1A/5-HT7 receptors (7b·HCl) in the forced swim test (FST) in mice. The 5-HT1AR ligand (7a·HCl) with a much lower affinity for 5-HT7R compared to that of 7b·HCl was tested comparatively. Both compounds showed antidepressant activity, while 5-HT1A/5-HT7 double antagonist 7b·HCl showed a stronger and more specific response.]]>
<![CDATA[TOP 23 w 2023 roku – produkty i usługi, które powinieneś znać : Rozwiązania firmy HERZ]]> Tue, 29 Nov 2022 13:26:31 +0100 Muniak, Damian
rodzaj: publikacja w serwisie internetowym
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<![CDATA[Rozwój maszyn i urządzeń chłodniczych w badaniach teoretycznych i eksperymentalnych : praca zbiorowa. T. 2]]> Tue, 29 Nov 2022 12:14:53 +0100 rodzaj: książka
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<![CDATA[Synthesis of rail vehicles dynamical structures : workshop of computer simulation, Zakopane, January 22-25 1997]]> Tue, 29 Nov 2022 11:42:25 +0100 rodzaj: materiały konferencyjne - redakcja książki
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<![CDATA[Lighting of pedestrian and pedestrian-driving routes in a housing estate as a source of light pollution]]> Tue, 29 Nov 2022 11:00:48 +0100 Ściężor, Tomasz
rodzaj: artykuł w czasopiśmie
Abstrakt: This paper is devoted to the extremely important issue of lighting pedestrian and pedestrian-driving routes within a housing estate. Both aspects are discussed with regard to the safety of route users and the potential impact on the natural environment through the phenomenon of light pollution. It was found that most of the outdated high-pressure sodium lamps present in the analysed Podwawelskie housing estate in Kraków do not fulfil their basic purpose, which is to sufficiently illuminate the ground below. Nevertheless, the light of these lamps does not make a noticeable contribution to the basic form of light pollution, which is the city's sky glow. It has been suggested that it would be best to replace these types of lamps with LED lighting, which has already been partly done. The LED lamps provide lighting that is sufficient to ensure the safety of residents. However, their improper installation may cause glare for pedestrians or residents of neighbouring houses. Additionally, their light reflected from an excessively bright pavement makes a significant contribution to the artificial sky glow. Solutions are proposed that minimise the negative impact of this lighting on the environment while ensuring comfort for the residents of the estate, which is in line with the principles of sustainable development.]]>
<![CDATA[Investigating urban form, and walkability measures in the new developments. The case study of Garnizon in Gdansk]]> Mon, 28 Nov 2022 14:12:38 +0100 Poklewski-Koziełł, Damian; Dudzic-Gyurkovich, Karolina; Marmolejo Duarte, Carlos
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Abstrakt: Sustainable transport choices are gaining much attention as they may support the global shift towards reducing the carbon footprint and developing more energy-efficient cities. The relation between urban form and sustainable transport has been discussed by academics and practitioners and there is a consensus that specific parameters of urban form can encourage walking and discourage car use. Following global recommendations on sustainable development, countries take steps towards strengthening pedestrian accessibility by implementing spatial characteristics of walkable neighbourhoods, but also by mobility and urban design strategies. This issue, however, is not properly recognised in countries with short experience in sustainable urban development, such as former socialist countries. In Poland no studies on walkability-related parameters of urban form have been carried out, hence the knowledge in this field is limited. This paper aims to address this gap by providing evidence of a newly built urban district located in Gdansk, Poland. We present the Polish case with three examples of new urban districts from Western Europe, that are designed as sustainable and walkable environments. The methodology is based on the descriptive case study. It includes characteristics of design parameters namely the components of the “walkability index” as well as mobility solutions and urban design guidelines. The results show the current position of Garnizon development in relation to the Western European cases with regard to the existing post-communist legacy and allow for indicating differences and possible shortcomings. Additionally, the study results can be discussed in the context of improving the quality of the housing environment in Poland through pedestrian-oriented development strategies.]]>
<![CDATA[Effect of purification from sulfates on phase composition of sodium tripolyphosphate obtained from wet-process phosphoric acid derived from Kola apatite]]> Mon, 28 Nov 2022 12:24:27 +0100 Kijkowska, R.; Kowalski, Z.; Pawlowska-Kozinska, D.; Wzorek, Z.; Gorazda, K.
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<![CDATA[Biodrukowanie z wykorzystaniem biotuszy na bazie alginianów]]> Mon, 28 Nov 2022 10:06:15 +0100 Słota, Dagmara; Głąb, Magdalena
rodzaj: artykuł w czasopiśmie
Abstrakt: W ostatnich latach nastąpił znaczny rozwój techniki biodrukowania 3D, będącej jednym z rozwiązań współczesnej inżynierii materiałowej. Biodrukowane struktury trójwymiarowe doskonale odwzorowują naturalne warunki panujące w organizmie. Szczególną rolę przypisuje się regeneracji tkanek i narządów w wykorzystaniem biotuszy zawierających żywe komórki. Jednym z głównych składników biotuszów są alginiany – polisacharydy charakteryzujące się biokompatybilnością oraz możliwością tworzenia struktury hydrożelowej. W pracy zaprezentowano najnowsze doniesienia literaturowe dotyczące alginianów stosowanych jako biotusze do odbudowy tkanki kostnej i chrzęstnej. Ponadto omówiono pokrótce właściwości tych polimerów oraz typy biodruku, takie jak biodruk ekstruzyjny, kropelkowy (inkjet) czy też wspomagany laserem.]]>