2016 - Repozytorium publikacji - Politechnika Gdańska

Pokaż publikacje z roku

Publikacje z roku 2016

Pokaż wszystkie

Strategiczne i operacyjne uwarunkowania wdrożeń innowacji w kontekście gospodarki sieciowej
- Radosław Drozd
- Wioleta Kucharska
2016 Pełny tekst Management Forum
Innowacyjność, relacje, współpraca i wiedza stanowią kluczowe czynniki determinujące przewagę konkurencyjną w gospodarce sie- ciowej [Tapscott 1999; Perechuda 2007; Mazurek 2012]. Celem artykułu jest wskazanie elementów wpływających na sukces procesu identyfikacji, a następnie wdrożenia nowych produktów na podstawie zidentyfikowanych powyżej determinant. Autorzy wskazują, iż nie każda innowacja jest źródłem wartości, podają definicję tzw. innowacji wartościowej. Artykuł ma charakter teoretycznych rozwa- żań nad istotą skutecznych wdrożeń innowacji. Opracowany przez autorów schemat procesu zarządzania innowacyjnością ze względu na dedykowaną sieć wartości wskazuje na kluczową rolę strategii innowacji w skutecznym jej wdrażaniu, co stanowi główną tezę artykułu Autorzy wskazują również na metodę zarządzania projektami jako skuteczny sposób operacyjnego wdrażania zmian.
Strategie miast powiatowych na obszarze peryferyjnym województwa pomorskiego.
- Jacek Sołtys
2016 Pełny tekst PRACE NAUKOWE UNIWERSYTETU EKONOMICZNEGO WE WROCŁAWIU
Artykuł nawiązuje do badań problemów rozwoju obszarów peryferyjnych (czyli poza obszarami metropolitalnymi) prowadzonych przez autora od 2009 r. Postawił on hipotezę, że rozwój miast powiatowych może zaktywizować gospodarczo ich otoczenie. W 2013 r. zbadał czynniki rozwojowe wskazane w planach strategicznych miast powiatowych na obszarze peryferyjnym województwa pomorskiego, obecnie - strategie tych miast w części dotyczącej rozwoju gospodarczego, w tym wykorzystanie czynników oraz ponownie czynniki - w dokumentach zaktualizowanych. Celem badań było sprawdzenie, czy i w jakim stopniu strategie wykorzystują rozpoznane czynniki rozwojowe. Źródłem informacji były plany strategiczne badanych miast, metodą - analiza tych planów. Odpowiedź na postawione w artykule pytania jest na ogół pozytywna. Wiele treści jest jednak zbyt ogólnych, nieeksponujących specyfiki miasta. Niektóre treści są nieprawidłowo sformułowane, niektóre - wątpliwe merytorycznie.
Strategies for Achieving Energy Neutrality in Biological Nutrient Removal Systems – a Case Study of the Slupsk WWTP (northern Poland)
- Ewa Zaborowska
- Krzysztof Czerwionka
- Jacek Mąkinia
2016
The paper presents a model-based evaluation of technological upgrades on the energy and cost balance in a large biological nutrient removal wastewater treatment plant (WWTP) in the city of Slupsk (northern Poland). The proposed upgrades include chemically enhanced primary sludge removal and reduction of the nitrogen load in the deammonification process employed for reject water treatment. Simulations enabled to estimate the increased biogas generation and decreased energy consumption for aeration. The proposed upgrades may lead the studied WWTP from the energy deficit to energy neutrality and positive cost balance, while still maintaining the required effluent standards for nitrogen. The operating cost balance depends on the type of applied coagulants/flocculants and specific costs of electric energy. The choice of the coagulant/flocculant was found as the main factor determining a positive cost balance.
Strategies for computationally feasible multi-objective simulation-driven design of compact RF/microwave components
- Sławomir Kozieł
- Adrian Bekasiewicz
2016 ENGINEERING COMPUTATIONS
Multi-objective optimization is indispensable when possible trade-offs between various (and usually conflicting) design objectives are to be found. Identification of such design alternatives becomes very challenging when performance evaluation of the structure/system at hand is computationally expensive. Compact RF and microwave components are representative examples of such a situation: due to highly compressed layouts and considerable electromagnetic (EM) cross-couplings between the circuit building blocks, high-fidelity EM simulation is the only reliable way of their accurate analysis. Unfortunately, it is a time consuming process. Consequently, direct multi-objective optimization of EM simulation models is impractical. In this work, we investigate strategies for computationally feasible multi-objective optimization of such structures. The presented solution approaches rely on surrogate-based optimization (SBO) paradigm, where the design speedup is obtained by shifting the optimization burden into a cheap replacement model (the surrogate). Two SBO techniques are considered: (i) structure decomposition and surrogate construction through cascading of (global) approximation models of the individual building blocks of the compact structure of interest, and (ii) design space confinement and approximation model construction using coarse-discretization EM simulation data. In both cases, design refinement is executed using space mapping. The presented techniques are illustrated using examples of wideband matching transformers. Numerical results and qualitative comparison of the methods are also provided.
STRĄCANIE WĘGLANU WAPNIA Z WYKORZYSTANIEM ODPADOWEGO ROZTWORU CHLORKU WAPNIA
- Donata Konopacka-Łyskawa
- Szymańska Paulina
2016
Węglan wapnia strącano z modelowych roztworów chlorku wapnia w reaktorze typu gaz(CO2)-lift za pomocą gazowego dwutlenku węgla w obecności amoniaku. Wydajność strącanego węglanu wapnia wynosiła około 70%. Cząstki CaCO3 charakteryzowały się monomodalnymi rozkładami wielkości, a ich średnia średnica wynosiła od 11,8 do 28 um. Zaproponowana metoda pozwala na wykorzystanie roztworu chlorku wapnia, który jest odpadem w technologii Solvay'a i otrzymywanie wysokiej jakości węglanu wapnia o kontrolowanej charakterystyce.
Street Art and Urban Regeneration. Case Study Gdansk and Rome.
- Justyna Borucka
- Claudia Mattogno
2016
Street art plays an important role in urban planning as a transforming engine to regenerate the public spaces and in the processes of participation. The article analyzes two main topics. The first one focuses on the urban serving as a support for spatial and cultural strategies in urban redevelopment projects. The second one is related to the potential of micro urban interventions as a strategy for a wider involvement of inhabitants and other social subjects. This study’s focus is on the comparison of two distinct social housing districts in Gdansk and Rome, analyzed to find out if urban art can improve the existing state of uncontrolled contemporary transformation and their spatial disorder in the urban landscape. The data for the comparative study of two suburban areas (San Basilio district in Rome, Italy and Zaspa – Młyniec district in Gdansk, Poland) was gathered during several workshops on location, investigation and interviews with the neighbors and the local administrators. The analysis is based on the comparison of public cultural and artistic interventions in these two locations, and issues of presence of art in public space and their consequences in practice with special emphasis on street art. The questions posed by this study are: What are the consequences of such public art interventions for the regeneration and transformation of the public space? Does the participation of local actors and inhabitants in creating public art have the potential to positively impact future development of the neglected urban areas? Does public art play a role in protecting the urban landscape, in affecting town planning? The political and economic changes in European cities have resulted in dramatic transformations of public space. Many instruments, including public art, support the existing urban planning tools. In turn, public art plays a crucial role in promoting social participation and raising public awareness. This understanding of the importance of local actors is a crucial step for protecting cultural heritage and the unique character of the place and the regeneration processes of cities.
Strefy ochrony ujęć wody podziemnej
- Ziemowit Suligowski
2016 Instal
Ogólne problemy ochrony sanitarnej ujęć wody. Ochrona bezpośrednia i pośrednia. Strefy ochrony ujęć wody powierzchniowej i podziemnej. Braki w zakresie ochrony ujęć wód podziemnych. Strategia unikania.
Strengthening the local communities’ competence for engaging in participatory planning
- Gabriela Maria Rembarz
- Justyna Martyniuk-Pęczek
2016 Pełny tekst Przestrzeń Ekonomia Społeczeństwo
The article describes the genesis of undertaking the subject of improving the planning competencies in local communities, in order to eliminate communication gaps to strengthen the civil attitudes. It puts forward a thesis that innovation in this issue involves creation of new participatory planning techniques, i.e. the described urban mentoring model. Describing the inclinations for undertaking the subject of the “Quo Vadis Gdansk? The citizens plan their city” project systematizes the knowledge on similar foreign practices and documents the development of an authorial method involving implementation of didactics in the process of realizing scientific research.
Structural analysis and physico-chemical characterization of mononuclear manganese(II) and polynuclear copper(II) complexes with pyridine-based alcohol
- Małgorzata Zienkiewicz-Machnik
- Joanna Masternak
- Katarzyna Kazimierczuk
- Barbara Barszcz
2016 JOURNAL OF MOLECULAR STRUCTURE
Two novel manganese(II) and copper(II) complexes, mononuclear [Mn(H2O)2(2-(CH2)2OHpy)2](NO3)2 (1) and polynuclear [Cu(SO4)(2-(CH2)2OHpy)2]n (2), based on 2-(hydroxyethyl)pyridine (2-(CH2)2OHpy) were synthesised and fully characterised using X-ray structure analysis as well as spectroscopic, magnetic and thermal methods. Both central metal ions Mn(1) and Cu(1) are coordinated by two N,O-donor 2-(CH2)2OHpy ligands and possess an almost perfect octahedral geometry (a chromophore of {MN2O4} type). The coordination sphere of Mn(II) is completed by two molecules of water, whereas, in polynuclear complex 2, Cu(II) atoms are linked along the a crystallographic direction by bridging sulfate ligands in a μ2-κ2 binding mode to form chains. The intermolecular interactions in 1 and 2 have been interpreted in view of the 3D Hirshfeld surface analysis and associated 2D fingerprint plots. Furthermore, the complexes have been tested with ABTSradical dot+ assay in order to assess their antioxidant activity. In addition, the IC50 values calculated for 1 and 2 revealed that the complexes show a higher antioxidant activity than corresponding ligand.
Structural and Transportation Properties of Strontium Titanate Composites with Ion Conductive Oxides
- Beata Bochentyn
2016 Pełny tekst Acta Energetica
This paper has been written based on the author’s doctoral dissertation “Structural and transportation properties of strontium and titanate composites with ion conductive oxides”, prepared under the supervision of Prof. Dr. Hab. Eng. Bogusław Kusz at the Department of Solid State Physics of Gdańsk University of Technology. It reports the idea of the thesis and conclusions from the study. Niobium doped strontium titanate (Sr(Ti,Nb)O3) composites with selected ion conductive oxides (yttrium oxide-stabilized zirconium oxide YSZ and cerium oxide CeO2) were developed for the dissertation and their properties examined.. It was shown that Sr(Ti,Nb)O3-YSZ composite as the anode in an oxide fuel cell leads to its improved performance compared to a cell with a singlephase Sr(Ti,Nb)O3 anode. Microscopic observation confirmed that Sr(Ti,Nb)O3-YSZ composite as the functional layer between a Sr(Ti,Nb)O3 anode and YSZ electrolyte mitigates the problem of the composite anode’s delamination from the electrolyte surface. It was also shown that an appropriate modification of the Sr(Ti,Nb)O3-YSZ composite anode surface structure by infusing the process of hydrogen’s electrochemical oxidation with a catalyst (e.g. with nickel) can lead to further improvement of the fuel cell performance.
Structural Dynamics and Stability of Composite Structures
- Sung-Cheon Han
- Ireneusz Kreja
- Guillermo Rus
- Gilson Lomboy
2016 Pełny tekst Advances in Materials Science and Engineering
This an editorial for a special Issue devoted to the application of dynamic and stability analysis of composite structures. In structural applications, past few decades have seen outstanding advances in the use of composite materials including Functionally Graded Materials (FGM). Most structures, whether they are used in civil, marine, or aerospace engineering, are subjected to dynamic loads during their operation.Therefore, dynamic and stability analysis is receiving much attention in academia and industries.
Structural Health Monitoring of Composite Shell Footbridge for Its Design Validation
- Mikołaj Miśkiewicz
- Łukasz Pyrzowski
- Jacek Chróścielewski
- Krzysztof Wilde
2016
The paper presents the structural health monitoring system of the composite bridge for pedestrians and cyclists. The footbridge was designed and manufactured within the FOBRIDGE project. It is the first bridge in the world, which is classified as a consistent single element structural girder, made of sandwich shells, entirely produced in a single cycle. The developed structural health monitoring system, supported design process, gave a possibility to confirm assumed capacity and to observe long-term rheological changes in structural material. The proposed SHM system contains three subsystems: monitoring of strains, vibrations and displacements. It is based on different kind of measurement sensors and precision levelling. The paper contains introduction to the topic, detailed description of the monitoring system and example results with reference to theoretical values.
Structural properties of hypothetical CeBa2Cu3O7 compound from LSDA+DMFT calculations
- Maciej Łuszczek
2016 Pełny tekst MATERIALS SCIENCE-POLAND
The hypothetical stoichiometric CeBa2Cu3O7 (Ce123) compound, which has not been synthesized as a single phase yet, was studied by the density functional theory (DFT). We utilized a method which merges the local spin density approximation (LSDA) with the dynamical mean-field theory (DMFT) to account for the electronic correlations. The LSDA+DMFT calculations were performed in the high-temperature range. The particular emphasis was put on the pressure-induced changes in the electronic band structure related to strongly correlated 4f states. The computational results indicate the occurrence of a large negative volumetric thermal expansion coefficient near T = 500 K and a trace of a low-volume isostructural metastable state at high temperatures.
Structural studies of a cold-adapted dimeric Beta-D-galactosidase from Paracoccus sp. 32d
- Maria Rutkiewicz-krotewicz
- Agnieszka Pietrzyk-Brzezińska
- Bartosz Sekuła
- Hubert Cieśliński
- Anna Wierzbicka-Woś
- Józef Kur
- Anna Bujacz
2016 Acta Crystallographica Section D-Structural Biology
The crystal structure of a novel dimeric [beta]-D-galactosidase from Paracoccus sp. 32d (Par[beta]DG) was solved in space group P212121 at a resolution of 2.4 Å by molecular replacement with multiple models using the BALBES software. This enzyme belongs to glycoside hydrolase family 2 (GH2), similar to the tetrameric and hexameric [beta]-D-galactosidases from Escherichia coli and Arthrobacter sp. C2-2, respectively. It is the second known structure of a cold-active GH2 [beta]-galactosidase, and the first in the form of a functional dimer, which is also present in the asymmetric unit. Cold-adapted [beta]-D-galactosidases have been the focus of extensive research owing to their utility in a variety of industrial technologies. One of their most appealing applications is in the hydrolysis of lactose, which not only results in the production of lactose-free dairy, but also eliminates the `sandy effect' and increases the sweetness of the product, thus enhancing its quality. The determined crystal structure represents the five-domain architecture of the enzyme, with its active site located in close vicinity to the dimer interface. To identify the amino-acid residues involved in the catalytic reaction and to obtain a better understanding of the mechanism of action of this atypical [beta]-D-galactosidase, the crystal structure in complex with galactose (Par[beta]DG-Gal) was also determined. The catalytic site of the enzyme is created by amino-acid residues from the central domain 3 and from domain 4 of an adjacent monomer. The crystal structure of this dimeric [beta]-D-galactosidase reveals significant differences in comparison to other [beta]-galactosidases. The largest difference is in the fifth domain, named Bgal_windup domain 5 in Par[beta]DG, which contributes to stabilization of the functional dimer. The location of this domain 5, which is unique in size and structure, may be one of the factors responsible for the creation of a functional dimer and cold-adaptation of this enzyme.
Structure and hyperfine interactions in Bi1−xNdxFeO3 solid solutions prepared by solid-state sintering
- Tomasz Pikula
- Jolanta Dzik
- Agata Lisińska-Czekaj
- Dionizy Czekaj
- Elżbieta Jartych
2016 JOURNAL OF ALLOYS AND COMPOUNDS
The series of polycrystalline ceramic powders, Bi1xNdxFeO3 (x = 0.11) was successfully synthesized by mixed oxide method followed by pressureless sintering. X-ray diffraction and Mössbauer spectroscopy were used as complementary methods to study structure and hyperfine interactions of the samples. It was found that with an increase of Nd content, within the range of x = 0.20.3 a structural phase transition from rhombohedral to orthorhombic system occurs. The lattice parameters and unit-cell volume decrease with an increase of Nd concentration. The Mössbauer spectra registered for Bi1xNdxFeO3 are characterized by sextets with slightly broadened lines and reveal distributions of hyperfine magnetic fields. It was found that the value of the hyperfine magnetic field induction monotonically increases with Nd content. The mean values of isomer shift are typical for Fe3+ ions in a high spin state and slightly decrease from 0.40 mm s1 for x = 0.3 to 0.37 mm s1 for x = 0.9. The small value of quadrupole shift confirms octahedral coordination of the iron ions. The structural transition is accompanied by an increase of isomer shift and a change of sign of quadrupole shift.
STRUCTURE AND MAGNETIC PROPERTIES OF Bi5Ti3FeO15 CERAMICS PREPARED BY SINTERING, MECHANICAL ACTIVATION AND EDAMM PROCESS. A COMPARATIVE STUDY
- Elżbieta Jartych
- Tomasz Pikula
- Mariusz Mazurek
- Wojciech Franus
- Agata Lisińska-Czekaj
- Dionizy Czekaj
- Dariusz Oleszak
- Zbigniew Surowiec
- A Aksenczuk
- Andrzej Całka
2016 Pełny tekst ARCHIVES OF METALLURGY AND MATERIALS
Three different methods were used to obtain Bi5Ti3FeO15 ceramics, i.e. solid-state sintering, mechanical activation (MA) with subsequent thermal treatment, and electrical discharge assisted mechanical milling (EDAMM). The structure and magnetic properties of produced Bi5Ti3FeO15 samples were characterized using X-ray diffraction and Mössbauer spectroscopy. The purest Bi5Ti3FeO15 ceramics was obtained by standard solid-state sintering method. Mechanical milling methods are attractive because the Bi5Ti3FeO15 compound may be formed at lower temperature or without subsequent thermal treatment. In the case of EDAMM process also the time of processing is significantly shorter in comparison with solid-state sintering method. As revealed by Mössbauer spectroscopy, at room temperature the Bi5Ti3FeO15 ceramics produced by various methods is in paramagnetic state.
Structure and properties of liquid Al–Cu alloys: Empirical potentials compared
- Jacek Dziedzic
- Szymon Winczewski
- Jarosław Rybicki
2016 Pełny tekst COMPUTATIONAL MATERIALS SCIENCE
We report on the structure and mass transport properties of liquid Al–Cu alloys predicted by two recently-developed empirical many-body potentials: MEAM (Jelinek et al., 2012) and EAM-ADP (Apostol and Mishin, 2011), and by the well-known Gupta potential. Total and partial pair correlation functions, angular distribution functions, densities, coordination numbers and self-diffusion coefficients are compared with published experimental and ab initio results for a number of temperatures above the liquidus. Prevalent local orderings are characterized by means of Voronoi analysis. Densities and the temperature coefficient of density are compared with experiment for different compositions of the alloy. All three studied potentials, and EAM-ADP and MEAM in particular, display marked difficulty in describing mixed (Al–Cu) interactions. EAM-ADP mispredicts Cu-rich alloys to re-solidify at all temperatures studied, while MEAM’s predictions for the density and its temperature dependence are poor for Al-rich compositions. Overall, the best description of liquid Al–Cu is offered by the Gupta potential, which is found to give a reasonable picture of short-range order and predicts mass transport coefficients and densities in moderately good agreement with experiment.
Structure and thermoelectric properties of Te/Ag/Ge/Sb (TAGS) materials obtained by reduction of melted oxide substrates
- Bogusław Kusz
- Tadeusz Miruszewski
- Beata Bochentyn
- Marcin Stanisław Łapiński
- Jakub Karczewski
2016 Pełny tekst JOURNAL OF ELECTRONIC MATERIALS
The Ge0.77Ag0.1Sb0.13Te1alloy was fabricated by a novel two step route. For that purpose firstly the oxide reagents were melted at high temperature and quenched into pellets. After that pellets were milled to the powder and then reduced in hydrogen at various temperatures and for various periods of time. Energy dispersive X-ray analysis indicated the possibility of successful fabrication of stoichiometric thermoelectric materials from Te-Ag-Ge-Sb (TAGS) group. The electrical conductivity and Seebeck coefficient have been determined over temperature range from +20 °C up to +340 °C in argon atmosphere. It was also shown that for most of the fabricated samples the size of crystallites as well as electrical parameters like electrical conductivity, Seebeck coefficient and figure of merit (ZT) increases with the increasing time of reduction.The highest value of ZT (~1.0 at 340oC) was obtained for samples reduced in hydrogen atmosphere at 400oC for 20h and 40h.
Structure of solvation water around the active and inactive regions of a type III antifreeze protein and its mutants of lowered activity
- Joanna Grabowska
- Anna Kuffel
- Jan Zielkiewicz
2016 Pełny tekst JOURNAL OF CHEMICAL PHYSICS
Water molecules from the solvation shell of the ice-binding surface are considered important for the antifreeze proteins to perform their function properly. Herein, we discuss the problem whether the extent of changes of the mean properties of solvation water can be connected with the antifreeze activity of the protein. To this aim, the structure of solvation water of a type III antifreeze protein from Macrozoarces americanus (eel pout) is investigated. A wild type of the protein is used, along with its three mutants, with antifreeze activities equal to 54% or 10% of the activity of the native form. The solvation water of the ice-binding surface and the rest of the protein are analyzed separately. To characterize the structure of solvation shell, parameters describing radial and angular characteristics of the mutual arrangement of the molecules were employed. They take into account short-distance (first hydration shell) or long-distance (two solvation shells) effects. The obtained results and the comparison with the results obtained previously for a hyperactive antifreeze protein from Choristoneura fumiferana lead to the conclusion that the structure and amino acid composition of the active region of the protein evolved to achieve two goals. The first one is the modification of the properties of the solvation water. The second one is the geometrical adjustment of the protein surface to the specific crystallographic plane of ice. Both of these goals have to be achieved simultaneously in order for the protein to perform its function properly. However, they seem to be independent from one another in a sense that very small antifreeze activity does not imply that properties of water become different from the ones observed for the wild type. The proteins with significantly lower activity still modify the mean properties of solvation water in a right direction, in spite of the fact that the accuracy of the geometrical match with the ice lattice is lost because of the mutations. Therefore, we do not observe any correlation between the antifreeze activity and the extent of modification of the properties of solvation water.
Structure-based design and evaluation of novel N-phenyl-1H-indol-2-amine derivatives for fat mass and obesity-associated (FTO) protein inhibition
- Monikaben Padariya
- Umesh Kalathiya
2016 COMPUTATIONAL BIOLOGY AND CHEMISTRY
Fat mass and obesity-associated (FTO) protein contributes to non-syndromic human obesity which refers to excessive fat accumulation in human body and results in health risk. FTO protein has become a promising target for anti-obesity medicines as there is an immense need for the rational design of potent inhibitors to treat obesity. In our study, a new scaffold N-phenyl-1H-indol-2-amine was selected as a base for FTO protein inhibitors by applying scaffold hopping approach. Using this novel scaffold, different derivatives were designed by extending scaffold structure with potential functional groups. Molecular docking simulations were carried out by using two different docking algorithm implemented in CDOCKER (flexible docking) and AutoDock programs (rigid docking). Analyzing results of rigid and flexible docking, compound MU06 was selected based on different properties and predicted binding affinities for further analysis. Molecular dynamics simulation of FTO/MU06 complex was performed to characterize structure rationale and binding stability. Certainly, Arg96 and His231 residue of FTO protein showed stable interaction with inhibitor MU06 throughout the production dynamics phase. Three residues of FTO protein (Arg96, Asp233, and His231) were found common in making H-bond interactions with MU06 during molecular dynamics simulation and CDOCKER docking.