Nowe zasoby w Repozytorium PK http://suw.biblos.pk.edu.pl/ Biblioteka Politechniki Krakowskiej lipinska@biblos.pk.edu.pl 60 <![CDATA[Characteristics of the complex modulus of recycled cold mix with foamed bitumen and recycled concrete aggregate]]> Sat, 15 Jun 2019 11:46:38 +0200 Buczyński, Przemysław; Iwański, Marek
rodzaj: referat opublikowany w czasopiśmie
Abstrakt: This article presents research on recycled cold mix with foamed bitumen (MCAS) containing recycled concrete aggregate. The primary concept driving this research was to determine if recycled concrete aggregate (RC) could be used as a substitute for reclaimed asphalt pavement (RAP). Recycled concrete aggregate was used in the MCAS mix in amounts ranging from 20%, 60% and 80%. The reference mix was the MCAS mix containing 50% reclaimed asphalt pavement (RAP) and virgin aggregate. Identical 0/31.5-mm continuously graded dolomite virgin aggregate was used in all mixes. 2.5% foamed bitumen (FB) and 2.0% CEM I 42.5R Portland cement (PC) were used to increase the cohesion of the mineral mix. Foamed bitumen was produced from 50/70 penetration paving bitumen. The behaviour of the recycled base course was tested in the range of cyclic sinusoidal strain with amplitude εo = 25–50 με. The tests were carried out in the (-7°C, 5°C, 13°C, 25°C, 40°C) temperature and (0.1 Hz, 0.3 Hz, 1 Hz, 3 Hz, 10 Hz, 20 Hz) loading time range. The complex modulus was tested in a direct tension-compression test on cylindrical samples (DTC-CY) in accordance with EN 12697-26. The results of the tests were used to assess the complex modulus (E*), phase angle (φ) and complex modulus components (E1) and (E2).Tests of the mixes indicate that recycled concrete aggregate can be used in recycled cold mixes in amounts of up to 80%. Increasing the amount of recycled concrete aggregate does not cause excessive stiffness of the recycled mix in comparison with the reference mix. The tests did not demonstrate a significant difference in terms of the phase angle (φ), which indicates a similar content of the viscous part and elastic part in the obtained complex modulus for the reference mix (RAP + MCAS) and the mix containing recycled concrete aggregate (RC + MCAS).]]>
<![CDATA[Assessment of Gilsonite and Trinidad Epuré natural asphalt-modified binders ability to relaxation at low temperature]]> Sat, 15 Jun 2019 10:42:57 +0200 Bilski, Marcin; Słowik, Mieczyslaw
rodzaj: referat opublikowany w czasopiśmie
Abstrakt: The paper presents the results of the tests conducted on asphalt binders modified with additives of natural Gilsonite and Trinidad Epuré asphalts, as well as the 20/30, 35/50 and 50/70 penetration grade bitumens by use of an original observation method of the relaxation phenomenon in low temperature. In the tests the authors used a ductilometer equipped with a dynamometer and a bath filled up with a liquid with the temperature of-16°C. Relaxation of the asphalt binder was observed in the period of 20 minutes in the conditions of constant deformation of the sample caused by its prior extension with the constant speed of 1 mm/min. The value of the normal stress occurring in the asphalt binder is calculated on the basis of the measured value of the normal (tensile) force. It has been noted that asphalt binders with higher penetration values are characterised by a better relaxation ability at low temperature, that is relaxation takes place faster and has higher values of sample stress reduction in the domain of time, at constant strain. With approximate penetration values (the maximum penetration difference at 25°C amounting to ±2 mm/10), modified binders comprising Gilsonite are characterised by better relaxation abilities in comparison to binders containing the Trinidad Epuré additive.]]>
<![CDATA[Geotechnical characteristics of unburnt colliery spoils after coal-recovery]]> Sat, 15 Jun 2019 09:56:08 +0200 Zydroń, Tymoteusz; Gruchot, Andrzej; Zawisza, Eugeniusz
rodzaj: referat opublikowany w czasopiśmie
Abstrakt: The aim of the study was to determine the geotechnical characteristics of the unburnt colliery spoils after coal-recovery from the dumping site of one of the mines of the Upper Silesian Coal Basin in Poland. Due to grain-size distribution of tested spoils their geotechnical properties were determined using medium-sized apparatuses. In order to verify the suitability of the studied spoils for the construction of hydraulic embankments, the seepage and stability calculations were conducted for models of hydraulic embankments including the effect of flood wave passage on stress conditions within the construction and their slope stability. The test results revealed, that the studied colliery spoils are characterized by favourable values of geotechnical parameters and they fulfil the requirements for soil materials used in the analysed type of constructions. The spoils are characterized by good compactibility, relatively low water permeability and average susceptibility to mechanical disintegration, which in the case of using this material for the construction of hydraulic embankments and using proper compaction technology, should reduce their susceptibility to weathering. The results of seepage and slope stability calculations for hydraulic embankments built of the studied spoils confirmed their suitability for that type of constructions, retaining the proper inclination of slopes, whereas the variant of embankment without sealing is safer from the stability viewpoint.]]>
<![CDATA[Cluster analysis in research of accident rate in construction sector]]> Fri, 14 Jun 2019 14:46:03 +0200 Drozd, W.
rodzaj: artykuł w czasopiśmie
Abstrakt: The construction site and its elements create circumstances that are conducive to the formation of risks to work safety during the execution of works. Analysis indicates the critical importance of these factors in the set of characteristics that describe the causes of accidents in the construction industry. This paper attempts to analyse the characteristics of the construction site to indicate their importance in defining the circumstances of an accident at work. The research was carried out on the basis of data from the register kept by the District Labour Inspectorate in Krakow, Poland. Main substantive tasks include isolating patterns of accidents on site and identifying those of the analysed characteristics that are important in defining these patterns. In terms of methodology, the paper presents a method of analysing data resources by using means of conceptual grouping in the form of cluster analysis.]]>
<![CDATA[Zastosowanie miedziowych kompleksów chlorofilu jako barwników naturalnych]]> Fri, 14 Jun 2019 14:41:50 +0200 Vogt, Elżbieta; Vogt, Otmar; Poręba, Ewelina; Malaca, Anna
rodzaj: artykuł w czasopiśmie
Abstrakt: Otrzymano metodami ekstrakcyjnymi chlorofilowe barwniki z surowców naturalnych. Dodatek barwników chlorofilowych zarówno do spoiwa temperowego, jak i do farby olejnej umożliwia uzyskanie farb w kolorze zielonym. Rodzaj dodawanego barwnika wpływa na właściwości użytkowe otrzymanych farb i polepsza przebadane właściwości wymalowanych powłok.]]>
<![CDATA[Bazowa defnicja modelu w SOLIDWORKS®]]> Fri, 14 Jun 2019 14:38:21 +0200 Malik, Maciej; Przytocka, Magdalena; Karpiuk, Michał
rodzaj: artykuł w czasopiśmie
Abstrakt: Potrzeba wymiany informacji oprojektowanej konstrukcji między kooperującymi zakładami oraz zapotrzebowanie na integrację różnych systemów informatycznych wymusiły na producentach oprogramowania CAx zmianę podejścia do dokumentacji technicznej. Opisano metodę zapisu danych źródłowych MBD (model based documentation) oraz jej imple-mentację wSOLIDWORKS® MBD.]]>
<![CDATA[Postprocessing and reliability evaluation of one-dimensional numerical simulation results in mechanical problems]]> Fri, 14 Jun 2019 14:10:05 +0200 Wojtas, Jan
rodzaj: artykuł w czasopiśmie
Abstrakt: The work addresses extended formulation of a new approach proposed to control numerical data error [9, 10]. It includes: development of postprocessing techniques for approximation of data given in a discrete form and estimation (evaluation) of this data a posteriori error and the reliability index. Theoretical consideration and numerical analysis are based on the Adaptive Meshless Finite Difference (MFDM) approach.]]>
<![CDATA[Najnowsze kierunki rozwoju stropów betonowych]]> Fri, 14 Jun 2019 14:01:42 +0200 Derkowski, Wit; Walczak, Rafał
rodzaj: artykuł w czasopiśmie
Abstrakt: Przegląd najnowszych światowych innowacji w dziedzinie stropów pokazuje, że aktualnie motorem dalszych poszukiwań są potrzeby odciążania konstrukcji, łatwego rozprowadzania wszelkich typów instalacji w grubości stropu, a także wykorzystanie konstrukcji stropowej do poprawy komfortu użytkowania pomieszczeń. W artykule omówiono i podano przykłady możliwych sposobów osiągania takich celów zarówno w stropach z prefabrykatów betonowych, jak i tych wykonywanych na miejscu budowy.]]>
<![CDATA[Data fusion in cloud computing: big data approach]]> Fri, 14 Jun 2019 13:56:54 +0200 Szuster, Piotr; Molina, Jose M.; García-Herrero, Jesús; Kołodziej, Joanna
rodzaj: materiały konferencyjne w książce
Abstrakt: Data Fusion System should maximize throughput during the complex fusion analytics in order to extract the critical information from a huge amount of data. Therefore, there is an immediate need to leverage efficient and dynamically scalable data processing infrastructure for the analysis of the Big Data streams from multiple sources in a timely and scalable manner. This is necessary for establishing the accurate Situation Awareness (SA) during the real time processes or real time simulations.]]>
<![CDATA[Finite-dimensional approximation for steady state nonlinear analysis of biochemical systems with axial dispersion]]> Fri, 14 Jun 2019 13:54:18 +0200 Tabiś, Bolesław
rodzaj: artykuł w czasopiśmie
Abstrakt: A problem concerning finite-dimensional approximation for some group of continuous bioreactors with axial dispersion was discussed. An oxidation ditch with partial recirculation of biomass was assumed as a case study. The presented methods were used to obtain steady states and steady-state branches as well as to analyse their linear stability. Three methods were tested and compared: equivalent tkans-in-series approximation, finite difference algorithm and orthogonal collocation.]]>
<![CDATA[Data fixing algorithm in radiosonde monitoring process]]> Fri, 14 Jun 2019 13:48:16 +0200 Szuster, Piotr
rodzaj: artykuł w czasopiśmie
Abstrakt: Earth surface monitoring can give information that may be used in complex analysis of the air conditions, temperature, humidity etc. Data from a vertical profile of the atmosphere is also essential for accurate thunderstorm forecasting. That data is collected by radiosondes – telemetry instruments carried into the atmosphere usually by balloons. Sometimes, due to the hostile conditions of upper troposphere, incorrect data can be generated by radiosonde sensors. In this paper, a new algorithm is developed for fixing the incorrect data, i.e. missing or out of specific range values. The proposed algorithm was tested both on benchmarks and real data generated by radiosondes. About 70% of significantly damaged test data volume was recovered. Up to 100% of real data was fixed.]]>
<![CDATA[Development of the range extender for a 48 V electric vehicle]]> Fri, 14 Jun 2019 10:26:05 +0200 Noga, Marcin; Gorczyca, Paweł
rodzaj: artykuł w czasopiśmie
Abstrakt: The article deals with the concept, development and results of preliminary tests of a range extender for an electric light commercial vehicle Melex with a 48 V electrical system. The purpose of the project is to build a prototype of the range extender powered by an internal combustion engine that will increase the range of the vehicle with electric drive, and at the same time will be characterized by a high efficiency and low exhaust emissions. The developed range extender is a combination of a 163cc single-cylinder combustion engine with a generator joined through a ribbed belt transmission. The 3-phase generator from a heavy-duty vehicle was used. In order to match the output voltage of the generator to the system voltage of the electric vehicle, an external adjustable regulator and a rectifier bridge with an increased operating voltage were used. The range extender was attached to a body of the electric vehicle by means of a welded frame made of thin-walled steel profiles. Initial tests of the developed range extender showed its proper interaction with both the lead-acid battery of the vehicle as well as with the nickel-metal hydride battery (NiMH) adapted to 48 V voltage from a hybrid electric vehicle. A maximum output power exceeding 2 kW was obtained. Maximum value of the overall efficiency of the range extender reaches up to 18.8%, which is a high value considering the small size of the used engine and the type of generator. The directions for further development of the range extender were also revealed in this paper.]]>
<![CDATA[Architektura produkcyjna jako przestrzeń ekspozycyjna. Projekt farmy pionowej dla Muzeum Żup Krakowskich w Wieliczce]]> Thu, 13 Jun 2019 13:24:55 +0200 Korzeniowska, Agata
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<![CDATA[Produkcja żywności w obiektach i na obszarach poprzemysłowych]]> Thu, 13 Jun 2019 12:20:14 +0200 Drożdż-Szczybura, Małgorzata
rodzaj: rozdział/fragment książki
Abstrakt: Na skutek zmian zachodzących na światowym rynku towarów, czynników produkcji, dóbr konsumpcyjnych i przemysłowych, starzenia się stosowanych technologii oraz zdarzeń losowych od końca lat 50. XX w. ustaje produkcja zarówno w pojedynczych zakładach, jak i całych miejskich dzielnicach przemysłowych. Zaistnienie opuszczonych obiektów przemysłowych wywołuje potrzebą ich zagospodarowania poprzez wprowadzanie nowych funkcji. Wśród licznych inicjatyw rewitalizacyjnych coraz powszechniej taką nową funkcją jest rolnictwo miejskie. Wczorajszy przemysł staje się jutrzejszym rolnictwem. Żywność wytwarzana jest najczęściej w byłych biurowcach i magazynach oraz budynkach, w których wcześniej prowadzono produkcję związaną z technologiami elektrycznymi, elektronicznymi i informacyjnymi. Jednym z istotnych ograniczeń rozwoju rolnictwa miejskiego i produkcji żywności w obiektach oraz na terenach poprzemysłowych są skażenia stanowiące skutek prowadzonej wcześniej industrialnej działalności gospodarczej.]]>
<![CDATA[The special economic zones – space architecture and people]]> Thu, 13 Jun 2019 09:50:02 +0200 Błachut, Jakub
rodzaj: materiały konferencyjne w książce
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<![CDATA[Chrzanów on nineteenth-century Austrian maps]]> Thu, 13 Jun 2019 09:46:37 +0200 Ślusarczyk, Marta
rodzaj: materiały konferencyjne w książce
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<![CDATA[Central Airport in Poland - Polish HUB in the global air transport system]]> Thu, 13 Jun 2019 09:42:55 +0200 Błachut, Jakub
rodzaj: materiały konferencyjne w książce
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<![CDATA[Architecture as the art of discovering a location]]> Thu, 13 Jun 2019 09:40:03 +0200 Kozień-Woźniak, Magdalena
rodzaj: materiały konferencyjne w książce
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<![CDATA[Between tradition and modernity and in search of a national style at the beginning of 20th century – a chapel of our lady of Częstochowa at the institution for nervously and mentally ill in Krakow-Kobierzyn]]> Thu, 13 Jun 2019 09:35:52 +0200 Staniewska, Anna
rodzaj: materiały konferencyjne w książce
Abstrakt: The paper deals with the issue of the design of a hospital chapel from early 20th century built as one of the buildings comprising the Institution for Nervously and Mentally Ill in Krakow-Kobierzyn. The whole complex was built as a pavilion style mental hospital starting from 1908 on the outskirts of Krakow. It was opened in 1917 and still operates. The hospital grounds cover ca.50 hectares and house a dozen of pavilions for patients and many background facilities such as administration buildings, pharmacy, kitchen and other service buildings together with villa of the director and houses for staff. The hospital complex was designed by a group of architects led by Władysław Klimczak, an architect who represented local building authority in Lviv. The Chapel of Our Lady of Częstochowa was designed by Antoni Budkowski and is an important element of the overall layout of the hospital but at the same time the values of its architecture and interior design are underestimated. The polychromy of the chapel was designed by an important, although not commonly known, artist Jan Bukowski. An analysis of architectural drawings of the chapel is compared with studies of church projects of that time published in contemporary architectural press. Moreover, a study of architectural details of the hospital buildings of the complex shows that the architects used a palette of common elements to keep the consistency of the architectural language of the whole ensemble. A reference is made to the competition entries for the projects for churches where architects attempted to represent the so called „national style”. The interior decoration is an example of a creative interpretation of folk motifs characteristic of art and artistic craft of the early twentieth century typical of Krakow's artistic milieu, which was inspired by similar movements in Europe, but created its own individual works. The initial design drawings of the chapel and its comparison with other buildings of the hospital complex and contemporary church designs prove that a Chapel of Our Lady of Czestochowa is an important example of the search for a national Polish architectural style from the modernism of the early 20th century.]]>
<![CDATA[Expression and delicacy – temporary architecture of Carmody Groarke studio]]> Thu, 13 Jun 2019 09:27:54 +0200 Gierbienis, Marcin
rodzaj: materiały konferencyjne w książce
Abstrakt: The reception of temporary architecture objects, which until now were treated only as substitutes for an existing buildings, has changed during recent years. Many realizations are characterized by high aesthetic values, as well by the fact that they positively affect the space in which they operate. Furthermore they can be considered the first step to the revitalization of degraded areas. Usually, the realization of a temporary pavilion is associated with cultural events, accompanying festivals or functioning during summer periods or at unusual locations. From the architects' perspective, designing temporary architecture is an opportunity to demonstrate their creativity by experimenting with a function, form or material, considering the fact, that they are aware that their work will not be subjected to an evaluation in hindsight. Carmody Groarke design studio, founded in London, owes its stature in the architectural industry to temporary objects. In the first years of its operation, these realizations allowed architects to present a specific manifesto of style and a unique approach to aesthetics. Formally cohesive and at the same time expressive buildings represent the consistency of vision of architects in the field of promotion of contemporary architecture, which is conceived to be close to a human, while remaining functional and economical, and intriguing and creative at the same time. Not without significance is their approach to technology and materials used, which with regard to the studio's realizations is in line with the idea of sustainable construction - a trend nowadays put in a line with aesthetics and functionality. The result is a positive reception of their realizations by the public opinion and the appreciation of the studio's activities in the industry, among others thanks to the received prizes. The purpose of this paper is to present temporary realizations carried out by Carmody Groarke design studio, which can be used as a model design method, confirming how the features of sustainable design should be used in a creative way while taking into account economic and social factors. The overriding aim of the work is to show a wide range of possibilities of temporary architecture design, which should not be marginalized, and objects that are created nowadays can be treated equally with permanent objects of architecture. ]]>
<![CDATA[Finite-difference distributions for the Ginibre ensemble]]> Thu, 13 Jun 2019 08:24:47 +0200 Duras, Maciej M
rodzaj: artykuł w czasopiśmie
Abstrakt: The Ginibre ensemble of complex random matrices is studied. The complex-valued random variable of the second difference of complex energy levels is defined. For the N = 3 dimensional ensemble, we calculate distributions of the second difference real and imaginary parts, as well as its radius and of its argument (angle). For the generic N-dimensional Ginibre ensemble an exact analytical formula for the second difference's distribution is derived. Comparison with the real-valued random variable of the second difference of adjacent real-valued energy levels for a Gaussian orthogonal, unitary and symplectic ensemble of random matrices, as well as for a Poisson ensemble, is provided.]]>
<![CDATA[Statistical properties of sparse gaussian random symmetrical ensemble]]> Thu, 13 Jun 2019 08:22:15 +0200 Duras, M. M.; Sokalski, K.; Sułkowski, P.
rodzaj: artykuł w czasopiśmie
Abstrakt: Sparse Gaussian Random Symmetrical Ensemble has been introduced. Its statistical properties have been investigated. Transition from chaotic sub-ensemble to integrable one versus fraction of the matrix elements not equal to zero has been found. Jump of cumulative distribution function at energy E = 0 has been interpreted as an order parameter which differentiates between chaotic and integrable ensembles.]]>
<![CDATA[Unexpected molecular mechanism of trimethylsilyl bromide elimination from 2-(trimethylsilyloxy)-3-bromo-3-methyl-isoxazolidines]]> Thu, 13 Jun 2019 08:08:29 +0200 Kącka-Zych, Agnieszka; Jasiński, Radomir
rodzaj: artykuł w czasopiśmie
Abstrakt: The molecular mechanism of elimination of the trimethylsilyl bromide (2) from 2-(trimethylsilyloxy)-3-bromo-3-methyl-isoxazolidines (1a–d) has been analyzed within the molecular electron density theory using density functional theory calculations at the M06-2X(PCM)/6-31+G(d) computational level. These elimination reactions take place via a two-step mechanism involving an intermediate. Bonding evolution theory analysis allows to set apart seven phases along the reaction path. Elimination of trimethylsilyl bromide starts with rupture of the C1–Br2 bond of 2-(trimethylsilyloxy)-3-bromo-3-methyl-isoxazolidine (1a). Thereafter, we observed the formation of the N5–C1 double bond and the last step of this elimination is associated with formation of a new Br2–Si3 bond and breaking of the Si3–O4 bond.]]>
<![CDATA[Quantum chaos in continuous spectrum]]> Thu, 13 Jun 2019 08:03:04 +0200 Duras, M. M.; Sokalski, K.
rodzaj: artykuł w czasopiśmie
Abstrakt: The continuous analogy to the spacing is introduced: the first derivative of energy with respect to its continuous labelling index and its distribution is calculated. As an example of application the Schroedinger particle with a random effective mass is investigated. The notion of quantum chaos and quantum integrability in continuous spectrum is widely discussed.]]>
<![CDATA[Wolność zaczęła się w Prokocimiu. Udział mieszkańców Prokocimia w wyzwoleniu Krakowa w 1918 r.]]> Wed, 12 Jun 2019 13:39:10 +0200 Ściężor, Tomasz
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<![CDATA[Potential studies of waterjet cavitation peening on surface treatment, fatigue and residual stress]]> Wed, 12 Jun 2019 13:27:08 +0200 Manoj Kumar, P.; Balamurugan, K.; Uthayakumar, M.; Thirumalai Kumaran, S.; Słota, Adam; Zając, Jerzy
rodzaj: materiały konferencyjne w książce
Abstrakt: Machining is undeniable in the manufacturing firm. In order to meet the emerging needs of engineering applications, new materials are developedand they create a complication in the machining owing to its extensive properties. The manufacturing industries are being pulled to use the unconventional machining to machine these materials. To improve the life of the end product,engineers adopt various technologies and follow different methodologies. Waterjet Peening (WJP) is one among the technologies where the surfaces arehardened by means of high-pressure water thereby provoking the beneficialresidual stress into the surface layers for some thickness. WJP is also be calledas the green technology because of its various advantages like eco-friendly, non-pollutant, no HAZ, ability to machine any materials, etc., then another uncon-ventional machining. In this paper, the potential study has been carried out onWJP by considering the surface treatment, residual stress, and the fatigue.As WJP is governed by various parameters, the influences of some significant parameters are detailed in this work. Only a considerable amount of work has been exposed on this machining practice. Hence, the researchers have felt that the review of WJP machine will enhance the machine utilization to a greater extent.]]>
<![CDATA[Fortyfikacje Prokocimia i ich udział w walkach I wojny światowej]]> Wed, 12 Jun 2019 13:02:21 +0200 Ściężor, Tomasz
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<![CDATA[ICT, innovations, regional growth and wages in Poland]]> Wed, 12 Jun 2019 12:32:50 +0200 Żyra, Joanna; Shevchuk, Viktor
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<![CDATA[„Wirtualna rzeczywistość” w strukturze miasta – ochrona dziedzictwa przemysłowego w procesie dydaktycznym]]> Tue, 11 Jun 2019 10:30:43 +0200 Zin, Barbara
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<![CDATA[Śródmieście Radomia – problemy i kierunki rewitalizacji]]> Tue, 11 Jun 2019 09:59:30 +0200 Derlatka, Adam
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<![CDATA[Application of hybrid drives in diesel locomotives]]> Tue, 11 Jun 2019 09:36:03 +0200 Rasiński, Tymoteusz; Michnej, Maciej
rodzaj: artykuł w czasopiśmie
Abstrakt: Ograniczenie emisji toksycznych substancji do atmosfery w transporcie jest jednym z głównych priorytetów Komisji Europejskiej. Coraz większy udział w zanieczyszczeniu powietrza ma transport. Rozwiązaniem tego problemu są alternatywne źródła energii oraz popularyzacja zrównoważonych sposobów podróżowania i transportu ładunków. Pozwoli to nie tylko na ograniczenie emisji zanieczyszczeń i zmniejszenie zużycia paliwa, ale również na obniżenie kosztów eksploatacji pojazdów szynowych. W niniejszym artykule autorzy dokonali analizy rozwiązań konstrukcyjnych napędów hybrydowych w pojazdach szynowych oraz przeprowadzili ocenę tych rozwiązań pod względem funkcjonalności i eksploatacji. W wyniku przeprowadzonej analizy przedstawiono koncepcję napędów hybrydowych dla podstawowych serii lokomotyw spalinowych eksploatowanych w Polsce. ]]>
<![CDATA[Influence of laser boriding on the friction and wear of sliding couples with bearing alloys]]> Tue, 11 Jun 2019 09:32:39 +0200 Dudek, Kazimiera; Szczypiński-Sala, Wojciech; Lubas, Janusz
rodzaj: artykuł w czasopiśmie
Abstrakt: The present study discusses the influence of laser borided surface layer on the parameters of sliding couples lubricated by engine oil. The borided layer was created by laser remelting of a surface layer of steel samples coated with amorphous boron. The study of friction, wear, and lubrication was conducted on the pairs made of steel AISI 5045 and SAE-783 and SAE-48 bearing alloys which were lubricated with 15W/40 engine oil. The research showed important differences in the friction coefficient and temperature in the tested couple with laser borided surface layer. In the couples containing the counterparts with SAE-783 bearing alloy, the tested parameter of friction was higher than in the couple composed of counterparts with SAE-48 bearing alloy. The counterparts with SAE-48 showed more intensive wear in contact with the laser borided surface layer than the counterpart with SAE 783. The process of friction at the contact area of the sliding couple with laser borided surface layer leads to the destruction of the lubricating properties of 15W/40 engine oil and reduces its resistance to scuffing and seizure. ]]>
<![CDATA[Polska architektura późnego modernizmu – plomby miejskie: dziedzictwo na pozór znane i niekoniecznie rewitalizowane]]> Mon, 10 Jun 2019 14:03:28 +0200 Urbańska, Marta
rodzaj: rozdział/fragment książki
Abstrakt: Architektura krakowskich plomb mieszkalnych, z okresu późnego modernizmu, kojarzonego zwykle z brutalizmem, przeskalowaniem i brakiem respektu dla kontekstu, zdecydowanie wyprzedza swą epokę w sensie poszanowania tegoż kontekstu. Lub raczej, cofa się do pełnej kultury architektonicznej międzywojnia, a nawet przełomu wieku XIX i XX. Nie znaczy to, że jest anachroniczna – wręcz przeciwnie, prezentuje cechę, którą po raz pierwszy w sensie architektury wyartykułował, i to w Krakowie, znakomity i nagradzany japoński architekt Kengo Kuma: to architektura site-specific, indywidualna, charakterystyczna dla miejsca, w którym powstaje. Architekturę tę, czy raczej postawę twórczą, nazwał kontekstualizmem (i krytycznym regionalizmem, w ślad za Kennethem Framptonem), Krzysztof Ingarden, autor słynnego już Małopolskiego Ogrodu Sztuki w Krakowie, architekt poświęcający bardzo wiele uwagi filozoficznej refleksji nad architekturą. Inspirowana tymi ideami, z uwagi na współpracę z ich autorami, autorka opracowała kilka utworów – esejów, jak i obszernych wystaw 29 – opisując i prezentując polską architekturę najnowszą jako „architekturę powściągliwości i umiarkowania, architekturę pełną respektu wobec wielowarstwowego kontekstu, historii, topografii, kultury miejsca – genius loci”.]]>
<![CDATA[Mało znane oblicze wybitnego artysty]]> Mon, 10 Jun 2019 13:59:59 +0200 Przybyszewski, Wojciech
rodzaj: opis bibliograficzny artykułu
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<![CDATA[Metody homogenizacji inteligentnych ośrodków dwufazowych umacnianych cząstkami]]> Mon, 10 Jun 2019 13:36:58 +0200 Barski, Marek
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<![CDATA[Wpływ zmiany ciśnienia porowego w czasie na osiadanie gruntu przy obciążeniu dynamicznym]]> Mon, 10 Jun 2019 09:19:44 +0200 Pietrzak, Natalia
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<![CDATA[Pretensioned concrete long span girders – directions of development]]> Mon, 10 Jun 2019 08:50:30 +0200 Dobisz, Kacper
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<![CDATA[Ścinanie belek sprężonych z niskim stopniem zbrojenia poprzecznego]]> Mon, 10 Jun 2019 08:23:31 +0200 Walczak, Rafał
rodzaj: rozdział/fragment książki
Abstrakt: W artykule przedstawiono badanie niszczące kablobetonowej, prefabrykowanej belki podsuwnicowej po ponad 50-ciu latach eksploatacji. Pomimo niskiego stopnia zbrojenia poprzecznego nośność eksperymentalna elementu na ścinanie jest kilkukrotnie wyższa niż nośność wyznaczona na drodze obliczeniowej. Przedstawiono podstawowe modele do obliczenia nośności na ścinanie podane w obecnie stosowanych normach oraz zbieżność wyznaczonych na ich podstawie nośności obliczeniowych z rzeczywistą nośnością elementu. Podkreślono rolę badań eksperymentalnych w procesie podejmowania decyzji dotyczących dalszej eksploatacji konstrukcji po okresie ich projektowanej trwałości.]]>
<![CDATA[Double layer sol-gel derived antireflective coatings on silicon – design, optical and Auger Electron Spectroscopy characterization]]> Mon, 10 Jun 2019 08:21:29 +0200 Skolik, M.; Domanowska, A.; Karasiński, P.; Gondek, E.; Michalewicz, A.
rodzaj: artykuł w czasopiśmie
Abstrakt: Double layer, silica – titania, antireflective coatings were fabricated on silicon substrates using sol-gel method and dip coating technique. 2 × 2 transfer matrix formalism was applied to optimize these structures. Spectrophotometric measurements of reflectance were performed to determine reflective properties of fabricated structures. Their chemical homogeneity was examined by Auger Electron Spectroscopy (AES)method. It was demonstrated that weighted average reflectance from the structures can be reduced to 3.71% over spectral range 300–1100 nm.]]>
<![CDATA[The minimizing vector theorem in symmetrized max-plus algebra]]> Mon, 10 Jun 2019 08:09:25 +0200 Özel, Cenap; Piękosz, Artur; Wajch, Eliza; Zekraoui, Hanifa
rodzaj: artykuł w czasopiśmie
Abstrakt: Assuming ZF and its consistency, we study some topological and geometrical properties of thesymmetrized max-plus algebra in the absence of the axiom of choice in order to discuss theminimizing vector theorem for finite products of copies of the symmetrized max-plus algebra. Several relevant statements that follow from the axiom of countable choice restricted to sequencesof subsets of the real line are shown. Among them, it is proved that if all simultaneously complete and connected subspaces of the plane are closed, then the real line is sequential. Abrief discussion about semidenrites is included. Older known proofs in ZFC of several basicfacts relevant to proximinal and Chebyshev sets in metric spaces are replaced by new proofs in ZF. It is proved that a nonempty subset C of the symmetrized max-plus algebra is Chebyshevin this algebra if and only if C is simultaneously closed and connected. An application of it to a version of the minimizing vector theorem for finite products of the symmetrized max-plus algebra is shown. Open problems concerning some statements independent of ZF and other statements relevant to Chebyshev sets are posed.]]>
<![CDATA[Analiza dostępności niektórych obiektów użyteczności publicznej dla osób niepełnosprawnych]]> Mon, 10 Jun 2019 07:57:33 +0200 Drozd, Wojciech
rodzaj: artykuł w czasopiśmie
Abstrakt: W artykule przedstawiono wybrane aspekty oceny dostępności obiektów użyteczności publicznej dla osób niepełnosprawnych. W tym kontekście przedstawiono wyniki badań przeprowadzonych na grupie osób niepełnosprawnych, identyfikując bariery architektoniczne dla nich w obiektach użyteczności publicznej aglomeracji krakowskiej. Wyniki ankiet pozwoliły także zapoznać się z ogólnymi badanych w zakresie dostępności budynków dla osób niepełnosprawnych. Z uwagi na wagę i skalę problemu oraz znikomąliczbę publikacji na ten temat podjęte badania wydają się być jak najbardziej potrzebne i uzasadnione.]]>
<![CDATA[Transport wewnętrzny w halach wielkopowierzchniowych na przykładzie przemysłu ciężkiego]]> Fri, 07 Jun 2019 13:56:48 +0200 Lorenc, Augustyn
rodzaj: artykuł w czasopiśmie
Abstrakt: Transport wewnętrzny w branży produkcyjnej ma szczególne znaczenie, które wynika zarówno z potrzeby przemieszczania surowców i wyrobów gotowych, efektywności jak również i bezpieczeństwa pracy. W artykule pokazano sposób organizacji transportu wewnętrznego typowego dla przemysłu ciężkiego, czyli branży w której niezawodność urządzeń transportowych ma szczególne znaczenie. Aby jak najlepiej przybliżyć to zagadnienie zastosowanie suwnic do transportu wewnętrznego omówiono na przykładzie firmy zajmującej się obróbką i wytwarzaniem stali.]]>
<![CDATA[Recognition of repulsive and attractive regions of selected serotoninreceptor binding site using FMO-EDA approach]]> Fri, 07 Jun 2019 13:23:36 +0200 Śliwa, Paweł; Kurczab, Rafał; Kafel, Rafał; Drabczyk, Anna; Jaśkowska, Jolanta
rodzaj: materiały konferencyjne w czasopiśmie
Abstrakt: The complexes of selected long-chain arylpiperazines with homology models of 5-HT1A, 5-HT2A, and 5-HT7 receptors were investigated using quantum mechanical methods. The molecular geometries of the ligand–receptor complexes were firstly optimized with the Our own N-layered Integrated molecular Orbital and molecular Mechanics (ONIOM) method. Next, the fragment molecular orbitals method with an energy decomposition analysis scheme (FMO-EDA) was employed to estimate the interaction energies in binding sites. The results clearly showed that orthosteric binding sites of studied serotonin receptors have both attractive and repulsive regions. In the case of 5-HT1A and 5-HT2A two repulsive areas, located in the lower part of the binding pocket, and one large area of attraction engaging many residues at the top of all helices were identified. Additionally, for the 5-HT7 receptor, the third area of destabilization located at the extracellular end of the helix 6 was found.]]>
<![CDATA[Wyspiański – odsłona druga]]> Fri, 07 Jun 2019 12:52:47 +0200 Bosak, Marta
rodzaj: opis bibliograficzny artykułu
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<![CDATA[Dwór "z darów bożych"]]> Fri, 07 Jun 2019 11:03:57 +0200 Nazar, Andrzej
rodzaj: opis bibliograficzny artykułu
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<![CDATA[Dmuchawy w oczyszczalni ścieków]]> Fri, 07 Jun 2019 10:13:17 +0200 Cyklis, Piotr
rodzaj: artykuł w czasopiśmie
Abstrakt: W publikacji przedstawiono ogólne warunki dla dmuchaw stosowanych w oczyszczalniach ścieków. Przedstawiono krótko konstrukcje możliwe do zastosowania. Najważniejszą częścią publikacji jest stadium przypadku oparte na warunkach pomiarów dmuchaw na rzeczywistym obiekcie przemysłowym w oczyszczalni ścieków w Chrzanowie.Pokazano porównanie bezpośrednich wyników pomiarów oraz ich analizę. Przedstawiono także wyniki analizy ekonomicznej zastosowania dmuchawy śrubowej w porównaniu z poprzednio eksploatowaną dmuchawą promieniową ]]>
<![CDATA[Improving the dimensional stability and mechanical properties of AISI 316L + B sinters by Si3N4 addition]]> Fri, 07 Jun 2019 10:06:03 +0200 Skałoń, Mateusz; Buzolin, Ricardo ; Kazior, Jan; Sommitsch, Christof ; Hebda, Marek
rodzaj: artykuł w czasopiśmie
Abstrakt: The following paper describes a new and e ective method to obtain high-density sinters with simultaneously decreased distortions, produced by one press and sinter operation. This e ect was achieved through the induced disappearance of the eutectic liquid phase. The study was carried out on AISI 316L stainless steel powder that was mixed with elemental boron and silicon nitride. Boron was used as a sintering process activator. The scientific novelty of this publication consists of the use of a silicon nitride as a solid-state nitrogen carrier that was intended to change the borides’ morphology by binding boron. Based on the thermodynamic calculations, 20 blends of various compositions were tested for physical properties, porosity, microstructure, and mechanical properties. Moreover, phase compositions for selected samples were analyzed. It was shown that the addition of silicon nitride as a nitrogen carrier decreases the boron-based eutectic phase volume and both increases the mechanical properties and decreases after-sintering distortions. An explanation of the observed phenomena was also proposed.]]>
<![CDATA[Porìvnâlʹnij analìz mečetej Persìï ì Magribu (VІI- ХVІІІ st.)]]> Fri, 07 Jun 2019 09:23:00 +0200 Papržica, Kristina
rodzaj: artykuł w czasopiśmie
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<![CDATA[Link between hydric potential and predictability of maximum flow for selected catchments in Western Carpathians]]> Fri, 07 Jun 2019 09:10:54 +0200 Wojkowski, Jakub; Młyński, Dariusz; Lepeška, Tomáš; Wałęga, Andrzej; Radecki-Pawlik, Artur
rodzaj: artykuł w czasopiśmie
Abstrakt: This study aimed to determine the link between a hydric potential of catchments (LHP) and the predictability (P) of maximum flow of selected rivers in southern Poland (within the Upper Vistula basin) and Slovakia. The LHPmethod refers to the ability of ecosystems to slowdown runoff and retainwater. The LHP method is focused on the analysis of the following indicators, shaping the geosphere at the catchment scale: hydrogeological conditions, soil conditions,meteorological conditions, geomorphological conditions, and land use. The predictability of river flows, calculated as one of the Colwell's indices, represents a measure of confidence with regard to the state of a flood event at a given point. To determine links between the LHP and P, a cluster analysis was used with the Ward method of agglomeration. The mean LHP varied between 1.2 for the Skawa River and 20.1 for the Vistula River. Only the Vistula River has very high LHP. The rest of the investigated rivers had medium and low values of LHP. The mean predictability of maximum flows for all rivers was relatively high (0.54), with the highest value obtained for theWisłok River (0.69) and the lowest one for the Białka River (0.40). Cluster analysis showed that the studied catchments may be aggregated into four homogeneity clusters: first - catchments with high P and limited LHP, second - catchments with mean P and low LHP, third - with low P and average LHP and fourth - with very high P andmediumand excellent LHP. The results are important for themanagement of catchments, especially for planning of any land use changes and investment projects related to water retention.]]>
<![CDATA[Aerodynamic effects on a non-typical steel chimney 120 m high]]> Fri, 07 Jun 2019 08:45:11 +0200 Ciesielski, R.; Flaga, A.; Kawecki, J.
rodzaj: artykuł w czasopiśmie
Abstrakt: Two identical steel chimneys, 120 m high were erected about 5 years ago. During exploitation of the chimneys, occurrence of considerable cross vibrations of the whole supporting structure and of the chimney shaft were noticed. Similar observation results were obtained for each of these chimneys. Observation results constituted the basis for carrying out a computational analysis, which aimed at determination of the causes of occurrence of this phenomenon and finding the possibility of reduction of chimney vibration. Results of these detailed analysis are presented and confronted with observation results. In order to eliminate considerable chimney vibrations caused by the described aerodynamic phenomenon, specially designed turbulizers and, subsequently, mechanical vibration dampers were applied. Effects of the treatments will be presented in the paper.]]>
<![CDATA[Coupling of inertial measurement units with a virtual world model for supporting navigation in bronchoscopy]]> Fri, 07 Jun 2019 08:37:19 +0200 Michalski, Dariusz; Nabagło, Tomasz; Tabor, Zbisław
rodzaj: artykuł w czasopiśmie
Abstrakt: Background and objective The purpose of this paper is to provide a method for supporting navigation in bronchoscopy based on measurements of absolute orientation of a tip of a bronchoscope and the length a bronchoscope is pushed in the lumen of an examined bronchial structure. Methods A hardware solution is designed and developed for collecting the data related to the absolute orientation of a tip of a bronchoscope and the length a bronchoscope is pushed in the lumen of an examined structure. A software which processes these data and visualizes in real-time the actual location of a bronchoscope tip in the lumen of a digital model of the examined structure (i.e. virtual bronchoscopy) is also designed and implemented. Results A calibration procedure is developed which constitutes a basis for the operation of the proposed system. A phantom of a tree-like structure is build, imitating the anatomy of a bronchial tree, and the proposed method of navigation is tested for the task of navigating in the lumen of the phantom to user-selected target locations. Conclusion A method has been proposed and tested for Inertial Measurement Unit (IMU)-based support of navigation in bronchoscopy.]]>
<![CDATA[Cosmetic emulsions : monograph]]> Thu, 06 Jun 2019 17:43:34 +0200 Sikora, Elżbieta
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<![CDATA[Instalacje oświetleniowe a problem zanieczyszczenia świetlnego]]> Thu, 06 Jun 2019 14:09:59 +0200 Ściężor, Tomasz
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<![CDATA[Pretekst : zeszyty Zakładu Architektury Mieszkaniowej i Kompozycji Architektonicznej]]> Thu, 06 Jun 2019 14:08:52 +0200 rodzaj: redakcja numeru czasopisma
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<![CDATA[A general phenomenon of spontaneous amplification of optical purity under achiral chromatographic conditions]]> Thu, 06 Jun 2019 13:55:51 +0200 Pietrusiewicz, K. Michał; Borkowski, Mariusz; Strzelecka, Dorota; Kielar, Katarzyna; Kicińska, Wioleta; Karevych, Sergei; Jasiński, Radomir; Demchuk, Oleg M.
rodzaj: artykuł w czasopiśmie
Abstrakt: This work explores the behavior of chiral compound mixtures enriched in one of the enantiomers whilst a typical chromatography on the achiral stationary phase is employed. The influence of several factors, such as the eluent composition, ratio of the compound to the stationary phase, and the initial enatiomeric purity of the compound used on the distribution of the enantiomers in the collected chromatographic fraction, was studied. The obtained results indicate that the phenomenon of Self Disproportionation of Enantiomer (SDE) occurred in all cases, and some of the collected fractions got higher optical purities than the initial one. Thus, achiral column chromatography could be applied in some cases as the simplest approach for chiral purification. Based on the experimental results and DFT calculations, an alternative concept explaining the SDE phenomenon was proposed. Due to its generality and simplicity, SDE may also be responsible for the formation of the first chiral non-racemic compounds on the early Earth.]]>
<![CDATA[Color-tunable carbon dots via control the degree of self-assembly in solution at different concentration]]> Thu, 06 Jun 2019 13:11:47 +0200 Song, Tong; Zhao, Yue; Matras-Postolek, Katarzyna; Yang, Ping
rodzaj: artykuł w czasopiśmie
Abstrakt: Using carbon spheres and sucrose as the carbon sources, two kinds of color-tunable carbon dots (Cdots) named as Cdots-C and Cdots-S were prepared via change the solution concentration. As the concentration of Cdots solution increased, varying degrees of self-assembly occur between monodisperse Cdots. Hence aggregates with different types formed, which can be observed. Appearance of new excitation bands at 465 and 520 nm caused by H- and J-type Cdots aggregates caused the emission at long wavelengths. At the same time, the excitation band at 300–400 nm induced blue-green emission and the competitions of three excitation bands resulted in the color-tunable PL behaviour which cover the region from green to red emission. The difference of carbon sources of Cdots-C, Cdots-S and Cdots-G (graphite) explained the reason why concentration-dependent PL behaviour were not observed in Cdots-G at a high solution concentration. The process of self-assembly were ascribed to hydrogen bonding interaction between abundant hydroxyl groups on the surface of Cdots-C and Cdots-S. This work provided a simple approach to modulate photoluminescence (PL) color of Cdots and will extend the application in bioimaging.]]>
<![CDATA[Właściwości reologiczne pian spożywczych z dodatkiem wybranych hydrokoloidów spożywczych otrzymanych metodą ciągłą ®]]> Thu, 06 Jun 2019 13:03:41 +0200 Kabziński, Maciej; Neupauer, Krzysztof; Nowak, Marcelina; Kruk, Joanna; Kaczmarczyk, Kacper
rodzaj: artykuł w czasopiśmie
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<![CDATA[The Applicability of 2-amino-4,6-diphenyl-pyridine-3-carbonitrile sensors for monitoring different types of photopolymerization processes and acceleration of cationic and free-radical photopolymerization under near UV light]]> Thu, 06 Jun 2019 09:12:22 +0200 Ortyl, Joanna; Fiedor, Paweł; Chachaj-Brekiesz, Anna; Pilch, Maciej; Hola, Emilia; Galek, Mariusz
rodzaj: artykuł w czasopiśmie
Abstrakt: The performance of a series of 2-amino-4,6-diphenyl-pyridine-3-carbonitrile derivatives as fluorescent molecular sensors for monitoring photopolymerization processes of different monomers by the Fluorescence Probe Technique (FPT) was studied. It has been shown that the new derivatives are characterized by much higher sensitivity than the commercially available 7-diethylamino-4-methylcoumarin (Coumarin 1) and trans-2-(2′,5′-dimethoxyphenyl)ethenyl-2,3,4, 5,6-pentafluorobenzene (25ST) probes. It has been discovered that the 2-amino-4,6-diphenyl-pyridine-3-carbonitrile derivatives accelerate the cationic photopolymerization process initiated with diphenyliodonium photoinitiators at the wavelength where the photoinitiator alone does not work. They are particularly efficient for the photoinitiation of cationic photopolymerization of an epoxide and vinyl monomers. Consequently, the application of the 2-amino-4,6-diphenyl-pyridine-3-carbonitrile derivatives in a dual role: (a) as fluorescent sensors for monitoring the free-radical, thiol-ene and cationic polymerization progress, and (b) as long-wavelength co-initiators for diphenyliodonium salts initiators, is proposed.]]>