Nowe zasoby w kolekcji Materiały konferencyjne http://suw.biblos.pk.edu.pl/ Biblioteka Politechniki Krakowskiej lipinska@biblos.pk.edu.pl 60 <![CDATA[Yellow color in European architecture and the built environment: traditions and contemporary applications]]> Fri, 09 Apr 2021 13:42:46 +0200 Tarajko-Kowalska, Justyna
rodzaj: materiały konferencyjne w książce
Abstrakt: This paper aims to summarize the most important facts concerning the use of the yellow color in architecture and the built environment, considering its symbolic, functional, and decorative aspects, with particular emphasis on Europe. To understand the diverse impact of yellow in space, its rich semantic layers, and various issues of preferences, two main research questions were formulated: 1) Does the ambivalence of yellow in European culture affect its present use in architecture? 2)What functions has yellow hue performed in architecture over the years? The research paper is divided into two main sections. The first part is dedicated to yellow in traditional architecture, while the second deals with its use in the contemporary built environment. The results conclude that although over the centuries the rationale and ways for using yellow in architecture were diverse, it was always present in many varieties, due to its positive connotations with sun, light, gold, and popularity of ochre pigments. Overcoming the role of visual stigma of some socially marginalized people, yellow could signify loyalty to governmental power and later became a kind of a symbol of social status e.g. in the Habsburg Dynasty. In contemporary built environments, yellow plays an important role in the city visual communication system and corporate identity. It is also the common color of mailboxes, taxis and tramways. Thanks to new materials and technologies yellow as a visual attractor appears at a large scale both in buildings and public spaces, being modern and an intriguing color in architecture. ]]>
<![CDATA[Kinetic and calorimetric studies of photopolymerization reaction of TMPTA acrylic monomer using new molecular luminescent sensors]]> Fri, 09 Apr 2021 13:04:20 +0200 Pilch, Maciej; Ortyl, Joanna; Popielarz, Roman
rodzaj: materiały konferencyjne w książce
Abstrakt: Due to the rapid development of technology, the need for new types of measurement systems for thermodynamic measurements of state parameters such as temperature is growing. In the field of high technology industry, the control of the distribution of thermodynamic state parameters on the surfaces of real objects is of particular importance [1]. Methods based on the measurement of body thermal radiation in the infrared range are currently commonly used for mapping the temperature distribution on surfaces [2]. Despite the widespread use of infrared temperature measurement technology, these techniques still have significant disadvantages. These include, above all, high costs of measuring equipment such as thermal imaging cameras, in particular when high accuracy and resolution of results are required. What's more, the results of temperature rise using infrared imaging can be disturbed by changes in other medium parameters, such as polarity or microlessness of the system. This feature of infrared radiation methods makes it difficult or completely eliminates the possibility of using these techniques to measure the temperature of the medium in which changes of these physicochemical parameters occur [2]. A potential solution to this type of problems may be the use of Fluorescent Probe Technology (FPT) for temperature measurement of such systems. In connection with the above a series of usefulness tests of selected europium(III) complexes for the role of luminescent temperature sensitive sensors was carried out and potential practical applications of such systems have been investigated.]]>
<![CDATA[Finding the way at Katowice railway station: an eye tracking experiment]]> Fri, 09 Apr 2021 12:45:09 +0200 Pashkevich, Anton; Bairamov, Eduard; Kłos, Marcin J.; Burghardt, Tomasz E.; Šucha, Matúš
rodzaj: materiały konferencyjne w książce
Abstrakt: A wearable eye tracker was utilised to study paths and observation of directional signs at main railway station in Katowice. For the purpose of identifying confusion points due to inadequate signage, the task of finding the railway station from a tram stop, finding train schedule, ticket office, and then platform was assigned to 16 young people who were either familiar or not familiar with the area. No meaningful differences were found between the two groups in terms of time to complete the task and the distance travelled. The simple and logical layout of Katowice railway station made the task easy, which is in stark contrast with prior similar experiment done at Kraków Główny railway station, where the differences were very significant and major confusions were recorded. Approximately 50% of directional signs and displays that were visible to test participants were observed, with no meaningful difference between the two groups, which is similar to the prior experiment. The outcome confirms that simplicity of transportation hub design is critical in minimising confusion amongst passengers.]]>
<![CDATA[Solving the last mile problem by creating DSS to manage bike sharing infrastructure development]]> Fri, 09 Apr 2021 11:25:08 +0200 Makarova, Irina; Boyko, Aleksey; Pashkevich, Anton; Tsybunov, Eduard
rodzaj: materiały konferencyjne w książce
Abstrakt: The paper deals with the relevant problem: ensuring safety and sustainability of urban transport systems. Authors have considered existing positive world-wide experience of both infrastructure and managerial solutions. Using the city of Naberezhnye Chelny as an example, a method is proposed for improving the safety of transport systems by improving cycle structures. Proposed system is aimed at evaluating cycling infrastructure development projects, including the development or adaptation of a management system. In the system presented in the article, it is accepted that cyclist safety can be assessed using a risk coefficient. The danger degree is affected by the presence of intersections, the density and speed of the traffic flow, the bike path type, as well as its width.]]>
<![CDATA[Applicability of selected 2-amino-4,6-diphenyl-pyridine-3-carbonitrile derivatives for monitoring of free-radical and thiol-ene photopolymerization by Fluorescence Probe Technology]]> Fri, 09 Apr 2021 11:18:27 +0200 Szymaszek, Patryk; Ortyl, Joanna; Fiedor, Paweł; Chachaj-Brekiesz, Anna; Pilch, Maciej
rodzaj: materiały konferencyjne w książce
Abstrakt: Fluorescence Probe Technology (FPT) is a recently developed method, which offers a possibility of online applications for monitoring of polymerization processes by means of appropriate fluorescent molecular probes that change their fluorescence characteristics upon changes occurring in their environment. Depending on the type of the process monitored and the monitored parameters, appropriate structure and characteristics of the probe are required. Therefore, development of new probes and/or identification of the probes suitable for particular systems among fluorophors available commercialy is important for their practical applications. In this research applicability of 2-amino-4,6-diphenyl-pyridine-3-carbonitrile derivatives as molecular probes for monitoring photoinitiated free-radical and thiol-ene polymerization of multifunctional monomers is reported. The progress of the photo-polymerization was monitored using a specially designed cure monitoring system, and fluorescence intensity ratios as the progress indicator. Relative kinetic parameters were determined from the kinetics profiles. It has been found that all of the 2-amino-4,6-diphenyl-pyridine-3-carbonitrile derivatives shifted their fluorescence spectra towards shorter wavelengths with polymerization progress, which was critical for application of these fluorophores as fluorescent probes.]]>
<![CDATA[New highly efficient photoinitiating systems for cationic and free-radical photopolymerization reactions under soft conditions]]> Fri, 09 Apr 2021 10:58:03 +0200 Jankowska, Magdalena; Ortyl, Joanna; Galek, Mariusz; Hola, Emilia
rodzaj: materiały konferencyjne w książce
Abstrakt: The applicability of stilbene derivatives for the role of co-initiators of photopolymerization processes of cationic monomers and free-radical promoted thiol-ene photopolymerization has been tested. The following compounds were used as co-initiators: 1-[(E)-2-(2,5-dimethoxyphenyl)vinyl]-2,3,4,5,6-pentafluoro-benzene and 1,2,3,4,5-pentafluoro-6-[(E)-2-(2,4,5-trimethoxyphenyl)-vinyl]benzene. To monitor the kinetics of photopolymerization reactions, infrared spectroscopy with Fourier transform (real-time FT-IR) was used - this method allowed to determine the degree of conversion of monomer functional groups as a function of time. Based on the conducted research, it was shown that the studied stilbene derivatives show accelerating effects in the case of photopolymerization processes using light sources in the UV-A range.]]>
<![CDATA[Stability study of new europium(III) complexes for the role of highly selective luminescent sensors for monitoring the temperature of the system]]> Fri, 09 Apr 2021 10:51:06 +0200 Pilch, Maciej; Ortyl, Joanna; Chachaj-Brekiesz, Anna; Popielarz, Roman
rodzaj: materiały konferencyjne w książce
Abstrakt: Due to the rapid development of technology, the need for new types of measurement systems for thermodynamic measurements of state parameters such as pressure and temperature is growing. As part of the research works, several series of europium(III) complexes were tested for the role of luminescent molecular sensors for monitoring the temperature of the system. In the first stage of work, the spectroscopic characteristics of the analyzed luminophores were examined. For this purpose, their absorption and emission spectra were measured in acetonitrile. Then the temperature calibration of these sensors was made, by measuring their emission spectra in hardened polymer matrices at different temperatures ranging from 10°C to 40°C. In the next stage of the work, the photostability and the immunity of the analyzed temperature sensors for disturbances of the system parameters in the form of polarity and microviscosity fluctuations of the medium were tested. The photostability and immunity of the sensors for disturbances of the system were measured by measuring the change in emission characteristics of the sensors during the radical photopolymerization process of the model acrylic monomer - TMPTA, during light irradiation at 320 nm for 750 seconds, at a constant temperature of 25°C. These measurements were made using a specially adapted system for kinetic measurements using Fluorescent Probe Technology. Finally, the possibility of using the proposed new europium(III) complexes for the role of luminescent sensors to monitor the system temperature was determined and their potential practical applications were proposed.]]>
<![CDATA[Applicability of amino 3-(2-pirydyl)chromen-2-one derivatives as a fluorescent molecular sensors for on-line and in-situ monitoring photopolymerization processes]]> Fri, 09 Apr 2021 09:08:54 +0200 Krok, Dominika; Topa, Monika; Ortyl, Joanna
rodzaj: materiały konferencyjne w książce
Abstrakt: Nowadays, various photochemical techniques are more and more popular in polymer chemistry. Photoinduced processes are the object of intense studies, because they are widely used in many industrial areas including coatings, printing inks, dental applications and 3D printing. One of the method which can be used for monitoring of different types of photopolymerization is FPT (Fluorescence Probe Technology). [1] This method is based on the use of fluorescent compounds, called probes, as molecular sensors for monitoring changes occurring in a polymerizing medium in real time, and the use of quanta of light for information transfer between the probe molecules and the monitoring system. The sensors applicable for polymeric materials processes usually respond to changes in polarity and microviscosity occurring in the polymerizing system. During the progress of the polymerization reaction the polarity of the reactive system decreases. At the same time, the viscosity of the system increases. [2], [3] Applicability of a group of amino 3-(2-pirydyl)chromen-2-one derivatives as fluorescent probes for monitoring of cationic, free-radical and thiol-ene photopolymerization of monomers by Fluorescence Probe Technology (FPT) has been studied. Based on researches new compounds can be used for monitoring fast photopolimeryzation proccess. These compounds are suitable for monitoring the kinetics of cationic and free-radical photopolymerization by used FPT (Fluorescence Probe Technology) method. ]]>
<![CDATA[Quinoline derivatives as highly efficient photosensitizers for cationic and thiol-ene photopolymerization]]> Fri, 09 Apr 2021 09:02:52 +0200 Jankowska, Magdalena; Ortyl, Joanna; Topa, Monika; Pilch, Maciej
rodzaj: materiały konferencyjne w książce
Abstrakt: The photopolymerization is a process which is widely used in many technologically important areas including coatings, printing inks, dental applications, electronic circuits, digital storage, solar cells and 3D printing. [1] In the industry different types of photopolymerization process are widely used, namely radical, cationic, hybrid and thiol-ene photopolymerization. Photoinitiated cationic polymerization reactions have some advantages over other types of photoinduced polymerization. Cationic photopolymerization is a method which is very fast and first of all environmentally friendly. Widely used cationic monomers like epoxides and vinyl ethers have low volatility and a negligible toxicity. Products of cationic photopolymerization have good adhesion and also good mechanical properties. [2] Thiol-ene photopolymerization occurs between two different functional groups: ene and thiol, this process occurs by means of free radical propagation steps. Thiol-ene reaction is known as a promising technique to synthesize materials for a broad set of applications including surface and molecule functionalization, cross-linking, grafting, UV-curable coatings, dental resins and recently even for polymeric biomaterials production. [3] In this paper, applicability of various substituted quinoline derivatives as photosensitizers in bimolecular photoinitiating system for cationic and thiol-ene photopolymerization processess is evaluated. To monitor the kinetics of photopolymerization reactions, infrared spectroscopy with Fourier transform (real-time FT-IR) was used. This method allowed to determine the degree of conversion of monomer functional groups as a function of time. Based on the conducted research, it was shown that the studied derivatives show accelerating effects in the case of photopolymerization processes using light sources in the UV-A range. ]]>
<![CDATA[Nowe wytyczne projektowania skrzyżowań drogowych – założenia i zmiany]]> Thu, 08 Apr 2021 14:45:59 +0200 Bąk, Radosław; Chodur, Janusz; Kieć, Mariusz; Gaca, Stanisław
rodzaj: materiały konferencyjne w czasopiśmie
Abstrakt: W artykule przedstawiono nowe wytyczne do projektowania skrzyżowań drogowych na drogach publicznych, które po okresie konsultacji publicznych będą rekomendowane do stosowania przez Ministerstwo Infrastruktury. Opisano zakres koniecznych zmian w nowym opracowaniu, zidentyfikowany na podstawie analizy dotychczasowych przepisów i wytycznych. Przedstawiono najważniejsze zmiany w podejściu do projektowania skrzyżowań oraz wskazano wybrane założenia przyjęte w nowych wytycznych.]]>
<![CDATA[Aspekty bezpieczeństwa ruchu w przepisach techniczno-budowlanych dotyczących infrastruktury drogowej]]> Thu, 08 Apr 2021 14:44:22 +0200 Gaca, Stanisław; Sandecki, Tadeusz; Jamroz, Kazimierz
rodzaj: materiały konferencyjne w czasopiśmie
Abstrakt: W artykule przedstawiono sposoby ujęcia wymagań bezpieczeństwa ruchu w standardach projektowania infrastruktury drogowej. Na podstawie analizy wybranych projektów i badań ankietowych zidentyfikowano braki w obowiązujących przepisach projektowania dróg. Na podstawie wniosków z tej analizy i stanu współczesnej wiedzy technicznej opisano zalecenia z zakresu bezpieczeństwa ruchu drogowego, które zostały wykorzystane przy opracowywaniu zbioru nowych wytycznych projektowania infrastruktury drogowej.]]>
<![CDATA[Wpływ składu mieszanki i rzeźby bieżnika opon bieżnikowanych na bezpieczeństwo czynne pojazdów]]> Thu, 08 Apr 2021 13:01:03 +0200 Zębala, Jakub; Ciępka, Piotr; Reza, Adam; Janczur, Robert
rodzaj: materiały konferencyjne w książce
Abstrakt: W artykule przedstawiono wyniki badań drogowych opon fabrycznych i opon bieżnikowanych, które obejmowały: awaryjne hamowanie, jazdę po okręgu i podwójną zmianę pasa ruchu. Badania wykonano w warunkach letnich i zimowych. Do badań zastosowano opony fabryczne firmy Michelin oraz opony tej samej firmy bieżnikowane mieszanką letnią i zimową. Wyniki badań wykazały wpływ bieżnikowania opon bezpieczeństwo czynne pojazdów. Różnice w uzyskiwanych opóźnieniach hamowania wskazują, że dla celów rekonstrukcji przebiegu wypadku celowe jest wykonywanie prób hamowania na miejscu wypadku na oponach, w które był wyposażony pojazd uczestniczący w zdarzeniu.]]>
<![CDATA[Widoczność w światłach mijania pojazdów innych niż typowe samochody osobowe. Wyniki badań]]> Thu, 08 Apr 2021 13:00:39 +0200 Janczur, Robert; Świder, Piotr
rodzaj: materiały konferencyjne w książce
Abstrakt: W artykule podano wyniki badań widoczności w światłach mijania samochodów, w których reflektory umieszczone są wyżej niż w typowych samochodach osobowych. Przy badaniach zastosowano metodykę podobną jak podczas wcześniejszych , publikowanych przez IES wyników badań. Artykuł stanowi więc uzupełnienie dostępnej literatury w tym zakresie.]]>
<![CDATA[Przechyły poprzeczne pojazdów - wyniki badań i symulacji komputerowych]]> Thu, 08 Apr 2021 13:00:16 +0200 Janczur, Robert; Świder, Piotr
rodzaj: materiały konferencyjne w książce
Abstrakt: W artykule podano wyniki badań przechyłów poprzecznych dla kilku wybranych samochodów osobowych i ciężarowych, wykonanych z wykorzystaniem żyroskopów i głowic Correvit H. Wyniki te są efektem prób drogowych prowadzonych w ramach badań stateczności i kierowalności. Podano też przykładowe wyniki symulacji ruchu badanych samochodów wykonanych najpopularniejszymi w Polsce programami, a w których przechyły poprzeczne są możliwe do określenia.]]>
<![CDATA[VBOX i V-SIM - od badań drogowych samochodu do komputerowej symulacji jego ruchu]]> Thu, 08 Apr 2021 13:00:00 +0200 Janczur, Robert
rodzaj: materiały konferencyjne w książce
Abstrakt: W artykule przedstawiono badania drogowe samochodu osobowego z wykorzystaniem aparatury pomiarowej VBOX firmy Racelogic oraz wyniki komputerowej symulacji ruchu samochodu wykonanej w oparciu o zarejestrowane w czasie badań manewry kierowcy. Dokonano porównania oraz oceny jakościowej i ilościowej czasowych przebiegów podstawowych parametrów ruchu pojazdu uzyskanych w badaniach drogowych i komputerowej symulacji.]]>
<![CDATA[Wpływ ciśnienia w ogumieniu na sterowność samochodu]]> Thu, 08 Apr 2021 12:59:48 +0200 Janczur, Robert; Świder, Piotr
rodzaj: materiały konferencyjne w książce
Abstrakt: W referacie przedstawiono wyniki badań wpływu obniżenia ciśnienia w ogumieniu kół przedniej i tylnej osi na sterowność samochodu. Przedstawiono wykresy zastępczych kątów znoszenia osi dla różnych ciśnień, w zależności od przyspieszenia poprzecznego. Przeliczono zastępcze współczynniki wspomnianych charakterystyk odporności na boczne znoszenie, w zakresie liniowym. Obliczono względną zmianę promienia toru jazdy samochodu z obniżonym ciśnieniem w kołach osi przedniej lub tylnej, w stosunku do toru przy ciśnieniu nominalnym.]]>
<![CDATA[Nowe pochodne terfenylu jako fotosensybilizatory soli jodoniowej do inicjowania procesu fotopolimeryzacji]]> Thu, 08 Apr 2021 12:40:04 +0200 Jankowska, Magdalena; Ortyl, Joanna; Hola, Emilia
rodzaj: materiały konferencyjne w książce
Abstrakt: Popularność procesów fotopolimeryzacji wzrasta z roku na rok, ze względu na szerokie zastosowanie w wielu dziedzinach przemysłu. Procesy fotopolimeryzacji odgrywają niezwykle istotną rolę w chemii polimerów. Produkty fotopolimeryzacji mają szerokie zastosowanie w przemyśle powłok. Fotoindukowane procesy są również stosowane do otrzymywania hydrożelowych materiałów polimerowych oraz w stomatologii do wytwarzania wypełnień fotoutwardzalnych. Ponadto procesy indukowane światłem odgrywają kluczową rolę w przemyśle mikroelektronicznym i elektronicznym, a także w przemyśle lakierniczym i motoryzacyjnym. Nowoczesne technologie stosowane do produkcji polimerowych materiałów powłokowych są oparte na procesach inicjowanych fotochemicznie. Procesy fotopolimeryzacji, ze względu na szereg zalet, jakie posiadają, są wykorzystywane w wielu gałęziach przemysłu. Główną zaletą procesu fotopolimeryzacji jest jej szybkość, co daje jej przewagę nad innymi metodami stosowanymi do produkcji ochronnych powłok polimerowych na różnych powierzchniach. Proces utwardzania powłoki trwa nawet do kilku sekund. Jest to również metoda przyjazna oraz przede wszystkim bezpieczna dla środowiska, ponieważ proces odbywa się bez emisji lotnych rozpuszczalników do atmosfery. Te cechy sprawiają, że procesy te są z powodzeniem stosowane w najnowocześniejszych technologiach stosowanych do produkcji materiałów polimerowych, na przykład w druku 3D, szczególnie w stereolitografii (ang. stereolithography - SLA), która jest najbardziej wszechstronną techniką druku 3D. Głównym celem badań było sprawdzenie przydatności opracowanych układów inicjujących opartych na pochodnych terfenylu do roli fotosensybilizatorów soli jodoniowej do inicjowania procesu fotopolimeryzacji kationowej i rodnikowej. Aby monitorować kinetykę reakcji fotopolimeryzacji, zastosowano spektroskopię w podczerwieni z transformacją Fouriera (FT-IR w czasie rzeczywistym). Na podstawie przeprowadzonych badań wykazano, że badane związki wykazują działanie sensybilizujące w przypadku procesów fotopolimeryzacji z wykorzystaniem źródeł światła UV-VIS.]]>
<![CDATA[Modern polymeric materials for environmental applications. Vol. 7, 7th International Seminar including Special Session 'Recent advances in polymer nanocomposites and hybrid materials', Kraków, 15-17 May 2019]]> Thu, 08 Apr 2021 12:32:46 +0200 rodzaj: materiały konferencyjne - redakcja książki
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<![CDATA[Wytyczne projektowania węzłów drogowych]]> Thu, 08 Apr 2021 12:32:03 +0200 Budzyński, Marcin; Jamroz, Kazimierz; Gaca, Stanisław
rodzaj: materiały konferencyjne w czasopiśmie
Abstrakt: W artykule przedstawiono wytyczne do projektowania skrzyżowań drogowych na drogach publicznych, które po okresie konsultacji publicznych będą rekomendowane do stosowania przez Ministerstwo Infrastruktury. Wskazano na potrzeby zmian i uzupełnienie obowiązujących przepisów. Przedstawiono podstawowe założenia związane z wyborem rozwiązania projektowego. Omówiono kryteria doboru podstawowych parametrów projektowych dla elementów węzłów oraz zasady projektowania wyposażenia technicznego węzłów.]]>
<![CDATA[High performance photoinitiating systems dedicated to photocurable coatings]]> Thu, 08 Apr 2021 12:28:27 +0200 Tomal, Wiktoria; Ortyl, Joanna
rodzaj: materiały konferencyjne w książce
Abstrakt: In this article, novel biphenyl derivatives (BPs) were proposed as a highly effective co-initiators for used in bimolecular photoinitiating system upon ultraviolet UV-A and visible light exposure using LEDs at 365, 405 and 420 nm. Remarkably, these structures perform exceptional initiating abilities for i) the cationic photopolymerization of epoxides, ii) the free radical photopolymerization of acrylic. Excellent polymerization profiles for all of the monomers, along with high final conversions where obtained. The photoinitiation mechanism of these bimolecular system based on BPs and diaryliodonium salts were investigated using the real time FT-IR technique, steady state photolysis and cyclic voltammetry.]]>
<![CDATA[Badania efektywności systemów fotoinicjujących do procesów fotopolimeryzacji działających poprzez mechanizm fotoredukująco-fotoutleniający]]> Thu, 08 Apr 2021 10:59:50 +0200 Hola, Emilia; Ortyl, Joanna
rodzaj: materiały konferencyjne w książce
Abstrakt: Najnowocześniejsze technologie wytwarzania materiałów polimerowych opierają się na procesach inicjowanych fotochemicznie. Wzrastające zainteresowanie fotopolimeryzacją skłania do poszukiwań nowych typów wysokowydajnych systemów fotoinicjujących, gdyż to właśnie od ich właściwości zależy efektywność oraz szybkość polimeryzacji. Aktualnie bardzo istotne jest, aby nowe systemy inicjujące pozwalały na pracę przy wykorzystaniu światła ultrafioletowego (UV) oraz widzialnego (Vis) w zakresie emisji diod UV-LED oraz Vis-LED. Działanie dwuskładnikowych systemów inicjujących, zawierających w swoim składzie sól jodoniową oraz fotosensybilizator, polega na fotoindukowanym procesie przeniesienia elektronu pomiędzy fotosensybilizatorem oraz solą oniową. Systemy inicjujące wykorzystujące procesy fotoredox charakteryzują się wszechstronnością działania dzięki czemu znajdują zastosowanie do inicjowania polimeryzacji rodnikowej, kationowej, tiol-en oraz do otrzymywania IPN (Interpenetrating Polymer Networks).]]>
<![CDATA[Zwiększenie efektywności procesu fotopolimeryzacji dla standardowych monomerów stosowanych w produkcji kompozytów stomatologicznych]]> Thu, 08 Apr 2021 10:49:14 +0200 Topa, Monika; Ortyl, Joanna
rodzaj: materiały konferencyjne w książce
Abstrakt: Fotopolimeryzacja, czyli proces polimeryzacji zachodzący pod wpływem promieniowania UV lub światła widzialnego posiada szereg istotnych zalet (m.in. dużą szybkość reakcji i łatwość jej kontrolowania) i znajduje szerokie zastosowanie, w tym także w stomatologii. W pracy zbadano nowy system fotoinicjujący składający się z soli jodoniowej Sylanto 7M-P i 4-(dimetyloamino)benzoesanu etylu (EDAB) do inicjacji fotopolimeryzacji 2,2-bis-4-(2’-hydroksy-3-metakryloksypropoksy)-fenylu (BisGMA) i dimetakrylanu glikolu trietylenowego (TEGDMA). Jako wzorzec zastosowano kamforochinon (CQ) i 4-(dimetyloamino)benzoesan etylu (EDAB). ]]>
<![CDATA[New terphenyl derivatives used as molecular sensors in Fluorescent Probe Technology (FPT)]]> Thu, 08 Apr 2021 10:11:12 +0200 Gruchała, Alicja; Hola, Emilia; Ortyl, Joanna
rodzaj: materiały konferencyjne w książce
Abstrakt: Fluorescent Probe Technology (FPT) is used to monitor the kinetics of photopolymerization processes. This issue is very important for many branch of industry, for example for motorization, electronics or medicine because knowledge about the tenor of the process is essential to obtain high quality products with desirable properties. This technique is becoming more and more popular nowadays, mostly because of her advantages – is nondestructive, sensitive and the survey is quick. Moreover measurements can by done on-line during the production of polymers. This method based on changes of fluorescence characteristics of molecular sensors witch are added to photo-curable compositions These changes are induced by increase of viscosity during the process and also by decrease of medium polarity of microenvironment. Both spectrum shift and fluorescence intensity can be used as indicators of the process. There aren’t universal fluorescent probes because the type of sensor depends mostly on the microenvironment. Hence there is a need to search for new compounds capable to act as molecular probes. Research of terphenyl derivatives as fluorescent molecular probes for cationic photopolymerization of triethylene glycol divinyl ether monomer (TEGDVE), free-radical photopolymerization of trimethylolpropane triacrylate monomer (TMPTA) and thiol-ene photopolymerization of 1,3,5-triallyl-1,3,5-triazine-2,4,6-trione (TATATO) and trimethylolpropane tris(3-mercaptopropionate) (MERCAPTO) as monomers have been realized. Molecular probes were added to compositions in small concentration. All of the terphenyl derivatives can be used as fluorescent probes for foregoing types of photopolymerization. ]]>
<![CDATA[Three-dimensional bending analysis of multi-layered orthotropic plates using two-dimensional numerical model]]> Thu, 08 Apr 2021 09:53:09 +0200 Pluciński, Piotr; Jaśkowiec, Jan
rodzaj: materiały konferencyjne w książce
Abstrakt: This paper presents numerical model in which the bending of the multi-layered laminated plates with orthotropic properties are considered. Such kind of plates are usually used in fibrous composites and are issue of scientific research. The modelling in this paper is fully three-dimensional (3D), however the two-dimensional (2D) finite element method is applied and so the method is called FEM23. In the analysis the number of the layers, their thickness and the orientation of the orthotropic layers may be arbitrary. For each layer, the numerical model is firstly prepared. Subsequently, these all single layer models are assembled to the one global model. In such an approach each layer can have different properties, especially various orthotropic orientation. The numerical model is helpful in analysis of modern multilayer structures that consist of thick and very thin layers. Although, the layers are 3D modeled, their orthotropic properties are only in-plane 2D. The layers are described using orthotropic Hooke’s tensor defined in the coordinate system associated with the orthotropic directions. The transformation to the global coordinate system is required to construct the single global numerical model. In the tailored post-processing for each layer, the stresses in their local coordinates can be easily retrieved. The correctness and robustness of the presented method has been confirmed comparing to other results known in literature as well as those obtained in Abaqus system. In this paper various examples are presented in which some configurations of the orthotropic multi-layered plates are modelled with FEM23. The full 3D results can be presented for each of the layers.]]>
<![CDATA[Heat transfer optimization of end winding rotor generator by the use of modified axial spacer: a case study]]> Thu, 08 Apr 2021 09:32:41 +0200 Baskoro, Y.; Jaya, I.; Glowacz, A.; Sułowicz, M.; Caesarendra, W.
rodzaj: materiały konferencyjne w czasopiśmie
Abstrakt: This paper presents a case study of a rotor fault occurring in the rotor generator of a steam power plant located in Lontar, Banten Province, Indonesia. The steam power plant has 3 x 315 MV capacity and uses hydrogen in the cooling system. The issue arising during the operation was caused by heat transfer exceeding the normal level. The grounding of the rotor occurred through rising vibration and temperature, tripping the generator unit. During repairs, the axial spacer was replaced with a new model, where it is longer than the original, adding a bar spacer at a previously unavailable position and creating a cooling track profile. This is a case study on the replacement of the axial spacer model aimed at preventing the expansion of the winding, so as not to touch with each other, through the installation of a longer axial spacer and the addition of the spacer bar, and lastly adding the track profile to the cooling hydrogen gas flow thereby maximizing the cooling process from the end winding rotor generator. Heat transfer is an analysed parameter related to the model change of the axial spacer. The addition of a track cooling gas flow has been able to maximize the heat transfer process, which is simulated in this paper. The performance of the rotor generator increased through several parameters after the replacement of the axial spacer model.]]>
<![CDATA[Stress redistribution mechanism in concrete elements with polymer flexible joint: experimental results ]]> Thu, 08 Apr 2021 08:43:08 +0200 Zdanowicz, Łukasz; Tekieli, Marcin; Kwiecień, Arkadiusz
rodzaj: materiały konferencyjne w książce
Abstrakt: This paper describes the application of a Polymer Flexible Joint (PFJ) as a method of repairing concrete members. Prismatic specimens were concreted and tested in four-point bending up to failure to simulate damage. After failure they were repaired with PFJ with PT-type polymer and tested in flexure again. The aim of the research was to assess the repair effectiveness regarding load bearing capacity and strain capacity before and after repair and to show the stress redistribution phenomenon. Furthermore, during the tests two methods of measurements were applied – conventional measurements with extensometers and Digital Image Correlation (DIC) method. Results of load – crack mouth opening displacement (CMOD) and load – displacement obtained from both methods were compared and their compliance is presented. Moreover, it is shown that the DIC method is capable of presenting the developing crack pattern even before the maximum force is achieved. Failure mode can be thus better described and understood. Finally, the repair effectiveness was calculated as 87% in terms of load-bearing capacity and 278% in terms of strain capacity. The phenomenon of stress redistribution in concrete was explained and described.]]>
<![CDATA[Fluorescent Probe Technology (FPT), jako nieinwazyjna metoda badań jakości tworzyw polimerowych]]> Wed, 07 Apr 2021 14:14:53 +0200 Gruchała, Alicja; Hola, Emilia; Ortyl, Joanna
rodzaj: materiały konferencyjne w książce
Abstrakt: W ramach realizowanych prac badawczych zbadano zastosowanie pochodnych terfenylowych do roli sond fluorescencyjnych stosowanych w spektroskopii fluorescencyjnej. Przydatność sond do monitorowania kinetyki fotopolimeryzacji metodą FPT sprawdzono zarówno dla fotopolimeryzacji kationowej, jak i rodnikowej. Spektroskopia fluorescencyjna jest innowacyjną metodą kontroli jakości gotowych powłok polimerowych oraz kinetyki reakcji w czasie rzeczywistym, np. podczas produkcji – czym przewyższa większość technik stosowanych w tym celu. Posiada wiele zalet – otrzymujemy precyzyjne wyniki, pomiar jest szybki, jest to metoda wszechstronna. Możemy prowadzić pomiary, zarówno w przypadku fotopolimeryzacji kationowej, rodnikowej, a także typu tiol-en. Jednak nie ma uniwersalnych sond, ponieważ ich działanie opiera się na zmianie widma emisji w wyniku zmian mikrośrodowiska, w jakim się znajdują.1 W przypadku fotopolimeryzacji obserwujemy zmiany mikropolarności oraz lepkości, które wpływają na intensywność fluorescencji sondy molekularnej oraz na położenie widma fluorescencyjnego. Na tej podstawie możemy wyznaczyć parametry będące wyznacznikami procesu polimeryzacji. Metoda ta jest niedestruktywna, co znaczy, że sonda nie reaguje z badaną kompozycją, nie pobieramy próbek. Z tego powodu spektroskopię fluorescencyjną można uznać za metodę nieinwazyjną. Nie generuje ona odpadów, nie są stosowane szkodliwe substancje oraz rozpuszczalniki. FPT jest metodą przyjazną środowisku. Technika ta może z powodzeniem zostać zastosowana w medycynie, elektronice, dentystyce, przemyśle motoryzacyjnym i wielu innych, gdzie obserwujemy wzrost zainteresowania procesami fotopolimeryzacji.]]>
<![CDATA[Model of errors of touch-trigger probe installed on the industrial robot]]> Wed, 07 Apr 2021 13:55:30 +0200 Ostrowska, K.; Krawczyk, M.; Kupiec, R.; Gromczak, K.; Sładek, J.
rodzaj: materiały konferencyjne w czasopiśmie
Abstrakt: The paper presents the redundant coordinate system consisting of Kawasaki RS010N Industrial Robot (IR) equipped with Heidenhein touch-trigger probe. The probe was mounted on the IR instead of a gripper and it was connected to a controller. This probe generates a binary signal at the moment of contact with a measuring surface. When the probe gives the signal the controller calculates coordinates of a measuring point thanks to encoders mounted in rotary axis. The signal also affects drivers and machine control. In addition, a special program in AS language was written. The program allows for coordinate measurements using this system. As part of the research an attempt to define a mathematical errors model of acquisition points system was made. For this purpose the model first developed by prof. Jerzy Sładek was used. The errors model of the touch trigger probe describes a relationship between an approach vector and a deviation for each measuring point, taking into account the approach from different directions. For this purpose, tests were performed using material standards of size to identify this function, both as measured internally and externally. An attempt was made to model this function using approximation methods based on the artificial neural networks.]]>
<![CDATA[Sucha zabudowa wnętrz - teoria i praktyka]]> Wed, 07 Apr 2021 12:53:45 +0200 Kram, Dorota
rodzaj: materiały konferencyjne w książce
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<![CDATA[Smart composite rebars based on DFOS technology as nervous system of hybrid footbridge deck: a case study]]> Thu, 01 Apr 2021 14:23:24 +0200 Sieńko, Rafał; Bednarski, Łukasz; Howiacki, Tomasz
rodzaj: materiały konferencyjne w książce
Abstrakt: The article presents smart arch footbridge in Nowy Sącz (Poland) with hybrid composite-concrete deck. Composite stay-in-place formwork reinforced only with composite rebars was continuously concreted over entire span length of 80 m. The structure was equipped with unique structural health monitoring system based on distributed fibre optic sensing (DFOS) technology. Smart composite EpsilonRebars were used for this purpose providing comprehensive knowledge about strains profile over the entire length with spatial resolution starting from as fine as 5 mm. This rebars play a dual role in the structure: as a reinforcement they are included in load bearing capacity calculations and on the other hand they monitor strain state inside the concrete deck. Composite DFOS rebars integrated with the hybrid deck during construction stage allow for the analysis of its structural behaviour from the very beginning, including the thermal-shrinkage strains of early-age concrete or its deadweight. This approach in bridge engineering can be compared to the human nervous system able to detect threats in every point of the object.]]>
<![CDATA[Presentation of non-existent city monuments: a study on marking medieval fortifications]]> Thu, 01 Apr 2021 12:27:30 +0200 Stachura, E.
rodzaj: materiały konferencyjne w książce
Abstrakt: The urban layout of many European cities was shaped in the Middle Ages. Cities first evolved within their walls and as they developed and expanded larger rings of fortifications were constructed, which overlapped the original defence systems. Medieval fortifications often followed the natural terrain in order to strengthen their defensive potential. While in many cities and towns, the city fortifications have survived only in part the course of the walls, location of city gates and towers can be determined by archaeological research. Tangible urban and architectural heritage forms the essential element of local identity and inspires the imagination of the residents and tourists. Tangible urban and architectural heritage forms an essential element of local identity and inspires the imagination of residents and tourists. The loss of an original plan form of a walled town circuit threatens the identity of the medieval precinct within the modern city while even only fragmentary traces of a medieval wall system enable recognition and understanding of the original urban layout, past buildings and landscapes. For this reason, even non-existent phantom buildings and their hidden underground remnants will bear testimony to the original layout and should be marked in the cityscape. The paper presents the case study of the City of Raciborz (Poland) founded in the Middle Ages. Primarily, the city fortifications system included a perimeter of defensive walls with nine towers and three city gates. Today only remnants of walls and one tower are evident. The location and appearance of two out of three gates are well documented also the underground remains have been preserved. This paper aims to study the possibility of marking and displaying the non-existent city gates. Concept projects will illustrate this study.]]>
<![CDATA[Speech quality measurement methods and models over ip-networks]]> Thu, 01 Apr 2021 12:25:26 +0200 Tymchenko, Oleksandr; Khamula, Orest; Havrysh, Bohdana; Vasiuta, Svitlana; Jagiełło, Adam
rodzaj: materiały konferencyjne w książce
Abstrakt: The MOS-based speech quality measurement methods allow us to determine generic encoder quality assessments on IP networks. However, they have several cautions to working within real-time, as they require the involvement of highly qualified experts. The paper considers alternative methods of quality assessment based on PESQ PSQM algorithms, taking into account network factors such as delay, jitter, and packet loss during network congestion. Also, the paper shows the efficiency of using MSE calculation. Conducted an experimental study of the relationship between MSE and PESQ score for different speech signal encoders and performed conversion of MSE – MOS. The results are easily adaptable to new types of encoders and to assess the deterioration of voice signal transmission when exposed to a variety of network factors.]]>
<![CDATA[Investigation of ring and star polymers in confined geometries: theory and simulations]]> Wed, 31 Mar 2021 13:26:26 +0200 Halun, Joanna; Karbowniczek, Paweł; Kuterba, Piotr; Danel, Zoriana
rodzaj: materiały konferencyjne w czasopiśmie
Abstrakt: The calculations of the dimensionless layer monomer density profiles for a dilute solution of phantom ideal ring polymer chains and star polymers with f = 4 arms in a Theta-solvent confined in a slit geometry of two parallel walls with repulsive surfaces and for the mixed case of one repulsive and the other inert surface were performed. Furthermore, taking into account the Derjaguin approximation, the dimensionless layer monomer density profiles for phantom ideal ring polymer chains and star polymers immersed in a solution of big colloidal particles with different adsorbing or repelling properties with respect to polymers were calculated. The density-force relation for the above-mentioned cases was analyzed, and the universal amplitude ratio B was obtained. Taking into account the small sphere expansion allowed obtaining the monomer density profiles for a dilute solution of phantom ideal ring polymers immersed in a solution of small spherical particles, or nanoparticles of finite size, which are much smaller than the polymer size and the other characteristic mesoscopic length of the system. We performed molecular dynamics simulations of a dilute solution of linear, ring, and star-shaped polymers with N = 300, 300 (360), and 1201 (4 x 300 + 1-star polymer with four arms) beads accordingly. The obtained analytical and numerical results for phantom ring and star polymers are compared with the results for linear polymer chains in confined geometries.]]>
<![CDATA[Simulation of train run along a selected route taking into account optimal control]]> Tue, 30 Mar 2021 12:01:29 +0200 Mańka, Adam; Konieczny, Jarosław; Kisielewski, Piotr
rodzaj: materiały konferencyjne w książce
Abstrakt: The article presents the results of works aimed at developing a train travel simulator on a selected route with a multi-criteria optimization module, the set of objective functions of which allows for the minimization of time, energy consumption, total costs or reduction of the negative impact on the natural environment. The optimization module also allows the determination of travel parameters to achieve the optimum of the function created from the combination of these goals, taking into account the weights proving their importance for the railway undertaking. The simulation tool presented in the article, together with the optimization module, gives completely new possibilities to the railway carrier, as it allows it to increase the economic efficiency of the travel while taking care of the human factor and safety as well as the natural environment. The basis of the system presented in the article is a simulator of a railway vehicle running along a defined route, for which it was required to define a mathematical model that would allow for consideration a number of input data allowing for the full formulation of the equation of train motion together with resistance to motion, traction characteristics, braking curves, and mapping of the railway infrastructure, but also taking into account rail traffic control, legal restrictions and the human factor. The article describes the mathematical model of a vehicle travel together with the basic assumptions of its implementation in the numerical version.]]>