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Mentor&Student Research Lab – Urban Transformations – Introduction
PublikacjaMentor&Student Research Lab - "Urban Transformations" is a common initiative of the members of Gdańsk University of Technology student research club, Urban Revolution Laboratory and the International Society of City and Regional Planners ISOCARP. The aim of the event was to promote collaboration of professionals and the students in the area of research on the city and the region. During three months’ Workshop five groups leaded...
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Features extraction from the electrocatalytic gas sensor responses
PublikacjaOne of the types of gas sensors used for detection and identification of toxic-air pollutant is an electrocatalytic gas sensor. The electrocatalytic sensors are working in cyclic voltammetry mode, enable detection of various gases. Their response are in the form of I-V curves which contain information about the type and the concentration of measured volatile compound. However,...
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Innovative cold-formed GEB section under compression
PublikacjaCold-formed steel sections extensively affect the modern steel construction industry. Not only are they used as secondary elements like purlins or sheeting, but also they can serve as primary load-bearing members in fabricated steel panels and trusses. A new cross-section called shortly a GEB may serve as that member. However, its existence of the metal building structures industry depends on the exact, optimal dimensional parameters...
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Temperature Fiber-Optic Sensor with ZnO ALD Coating
PublikacjaThis study presents a microsphere-based fiber-optic sensor with a ZnO Atomic Layer Deposition (ALD) coating thickness of 100 nm for temperature measurements. Metrological properties of the sensor were investigated over the temperature range of 100 °C to 300 °C, with a 10 °C step. An interferometric signal is used to control whether the microstructure is whole. Spectrum shift of a reflected signal is used to ascertain changes in...
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A model of the response of the MGS-6 gravity sensor to tilting
PublikacjaThe reliable interpretation of the measurements made by the Micro-g marine gravimetric system (MGS-6) depends on how the temporary changes of the scale coefficients such as gravimeter scale factor, vertical cross-coupling (VCC) effect, tiltmeter cross and tiltmeter long are compensated for during the signal analysis. The listed coefficients cannot be determined from readings during the measurements or by analysing the final data....
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Planar Microwave Bragg Reflector Resonant Dielectric Sensor
PublikacjaIn this paper, a periodic structure is used to design a microwave Bragg reflector with the help of hexagonal lattice, which provides a 5 GHz wide stopband between the low-pass band with cut-off frequency 2.6 GHz and the bandpass response with start and stop frequency 7.8 GHz and 10.5 GHz, respectively. A defect in lattice allows passing a narrowband signal at 6 GHz which is found, from the dispersion relation, to be in the region...
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Trajectories detection in a distributed multi-sensor tracking system
PublikacjaW pracy rozważono problem śledzenia obiektów poruszających się za pomocą rozproszonego systemu wieloczujnikowego. Głównym zadaniem systemu śledzenia jest detekcja i estymacja trajektorii obiektów poruszających się w obserwowanej przestrzeni. Trajektoria obiektu to ciąg estymat kinematycznego stanu obiektu, jego pozycji, prędkości, itp. Klasyczne systemy śledzenia oparte są na filtrze Kalmana korzystającym z danych z pojedynczego...
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Optimized Space Vector Modulation strategy for five phase voltage source inverter with third harmonic injection
PublikacjaThis paper presents a simple and an effective SVM algorithm for five-phase Voltage-Source Inverters with the possibility to control independently the voltage vectors for fundamental and auxiliary orthogonal subspaces. The essential benefit is that output voltage is generated using only four active voltage vectors with limited numbers of switching. In the proposed solution, four active vectors are arbitrary chosen, independent of...
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Entangled Histories vs. the Two-State-Vector Formalism - Towards a Better Understanding of Quantum Temporal Correlations
PublikacjaThe Two-State-Vector formalism and the Entangled Histories formalism are attempts to betterunderstand quantum correlations in time. Both formalisms share some similarities, but they are notidentical, having subtle differences in their interpretation and manipulation of quantum temporalstructures. However, the main objective of this paper is to prove that, with appropriately definedscalar products, both formalisms can be...
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Sektor usług wiedzochłonnych oraz jego dynamika i struktura zatrudnienia w krajach Unii Europejskiej
PublikacjaNiniejszy artykuł dotyczy sektora usług wiedzochłonnych oraz jego dynamiki i struktury zatrudnienia. W części teoretycznej opracowania przedstawiono zagadnienia definicyjne oraz klasyfikacyjne związane z sektorem usług wiedzochłonnych, a także omówiono kwestie wiedzochłonności tego sektora. W części badawczej zaprezentowano analizę dynamiki i struktury zatrudnienia w sektorach usług wiedzochłonnych krajów należących do Unii Europejskiej....
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Going all in or spreading your bet: a configurational perspective on open innovation interaction channels in production sectors
PublikacjaUsing different interaction channels within open innovation partnerships holds the potential to enhance the chance of success in production sectors. However, our comprehension of how open innovation partnerships are affected by varying combinations of interaction channels, and how this corelates with their level of open innovation output, remains limited. There are discrepancies in the current literature regarding the individual...
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Market Size, Competitiveness and Technological Frontier - the Impact of Trade Integration with the UE on Productivity in Polish Manufacturing Sectors
PublikacjaThis paper addresses the relationship between growth of relative productivity in Polish manufacturing sectors and forces stemming from trade integration with the EU. We look at the productivity growth from the perspective of relations between Polish manufacturing sectors and the foreign ones, focusing on partner countries from the enlarged EU. Empirical analysis is based on sector level bilateral data concerning both domestic (Polish)...
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space-vector pulse width modulation for three-level npc converter with the neutral point voltage control
PublikacjaPrzedstawiono strategię modulacji PWM dla trójpoziomowych falowników NPC z predykcją i kompensacją asymetrii rozkładu napięcia na kondensatorach obwodu pośredniczącego
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Sektor B2C w Polsce - badanie działań rynkowych stosowanych przez wybrane serwisy e-commerce
PublikacjaPoznanie preferencji konsumentów w odniesieniu do czynników, poprzez które serwisy handlowe starają się oddziaływać na internautów, pozwala na ich lepsze dopasowanie do oczekiwań konsumentów oraz na opracowanie skutecznych form komunikacji wspierającej sprzedaż. Artykuł prezentuje wybrane wyniki trzech etapów badań empirycznych.
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DNA-reactive anticancer imidazoacridinone C-1311 is a new inhibitor of hypoxia-inducible factor 1 alpha, vascular endothelial growth factor and tumor angiogenesis
PublikacjaHypoxia-inducible factor 1 (HIF-1) plays a critical role for tumor adaptation to hypoxia and promotes angiogenesis. Antitumor imidazoacridinone C-1311 is a DNA reactive topoisomerase II and FLT3 receptor tyrosine kinase inhibitor selected for phase II clinical trials for breast cancer. Here, we demonstrate the new mechanism of C-1311 action involving HIF-1a, vascular endothelial growth factor (VEGF) and angiogenesis as additional...
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Leveraging food waste for electricity: A low-carbon approach in energy sector for mitigating climate change and achieving net zero emission in Hong Kong (China)
PublikacjaIn recent years, food waste has been a global concern that contributes to climate change. To deal with the rising impacts of climate change, in Hong Kong, food waste is converted into electricity in the framework of low-carbon approach. This work provides an overview of the conversion of food waste into electricity to achieve carbon neutrality. The production of methane and electricity from waste-to-energy (WTE) conversion are...
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Detection of immunological agent by optical fiber sensor: preliminary study
PublikacjaThe objective of this study is the application of optical methods for detection of immunological agent concentration. As the agent we used the Cyclaid, produced by Apotex Inc. In this article we investigated different Cyclaid concentrations in water. We used a Fabry-Pérot interferometer working in a reflective mode, the measurements were performed with source with central wavelength λ = 1550 nm. The preliminary investigation have...
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Scaling of numbers in residue arithmetic with the flexible selection of scaling factor
PublikacjaA scaling technique of numbers in resudue arithmetic with the flexible selection of the scaling factor is presented. The required scaling factor can be selected from the set of moduli products of the Residue Number System (RNS) base. By permutation of moduli of the number system base it is possible to create many auxilliary Mixed-Radix Systems associated with the given RNS with respect to the base, but they have different sets...
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Properties of Nasicon-based CO2 sensor with Bi8Nb2O17 reference electrode
PublikacjaGas sensors are useful for the carbon dioxide concentration monitoring in many applications. The major challenge is to develop a potentiometric sensor working without the necessity of a reference gas and without a need of the reference electrode encapsulation. Important issue is a selection of reference electrode material, which should provide stable reference potential. For example as reference electrode material in sensor based...
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Transmission protocol simulation framework for the resource-constrained sensor network
PublikacjaIn this paper the simulation framework for simulation of the sensor network protocol is presented. The framework enables the simultaneous development of the sensor network software and the protocol for the wireless data transmission. The advantage of using the framework is the convergence of the simulation with the real software, because the same software is used in real sensor network nodes and in the simulation framework. The...
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Power quality conditioners with minimum number of current sensor requirement
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A study on the use of the BioBall® as a biofilm carrier in a sequencing batch reactor
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Shading of River Channels as an Important Factor Reducing Macrophyte Biodiversity
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Gesture Recognition With the Linear Optical Sensor and Recurrent Neural Networks
PublikacjaIn this paper, the optical linear sensor, a representative of low-resolution sensors, was investigated in the multiclass recognition of near-field hand gestures. The recurrent neural network (RNN) with a gated recurrent unit (GRU) memory cell was utilized as a gestures classifier. A set of 27 gestures was collected from a group of volunteers. The 27 000 sequences obtained were divided into training, validation, and test subsets....
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Wavelet Transform Analysis of Temperature Modulated Gas Sensor Response
PublikacjaThe aim of the study was to evaluate whether it is possible to extract the information about the gas concentration despite the influence of humidity. Commercial semiconductor sensor response was examined under the application of a periodic temperature change. The data was collected using measurement protocol for different concentrations of ammonia at specified levels of relative humidity. In this work we focused on the evaluation...
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Sektory kluczowe w polskiej gospodarce - analiza input-output
PublikacjaArtykuł stanowi próbę identyfikacji sektorów kluczowych w gospodarce polskiej z wykorzystaniem dostępnych tablic input-output za lata 1995, 2000 i 2004.Stosując podejście tradycyjne do identyfikacji kluczowych sektorów autorka wykorzystała dwie różne metody. Z wykorzystaniem metody nieważonej Rasmussena, pozwalającej na wskazanie technicznych powiązań między sektorami, sektory produkcji i dystrybucji elektryczności, gazu i wody,...
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Identification of volatile compounds based on the electrocatalytic gas sensor responses
PublikacjaMeasured response in case of electrocatalytic gas sensors is in form of a voltamperometric characteristic. Current-voltage (I-V) response shape depends on the gas type and its concentration. Such response contains significantly more information comparing with typical electrochemical sensors, but is quite difficult to analyze. When I-V curve contains current peaks, position of such peaks can be used...
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Prototype of electrochemical sensor for measurements of volatile organic compounds in gases
PublikacjaThe paper presents a laboratory prototype of an electrochemical sensor for measurements of volatile organic compounds (VOCs) in gases, utilizing ionic liquids and commercial screen printed electrodes by DropSens. The following ionic liquids have been tested as the electrolyte and redox reaction environment: 1-butyl, 3-methylimidazolium dicyanoamide ([BMIM][N(CN)2]), 1-octyl, 3-methylimidazolium tetrafluoroborate ([OMIM][BF4]),...
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Comparison of Downdraft and Updraft Gasification of Biomass in a Fixed Bed Reactor
PublikacjaThe aim of this study was to compare and analyze the gasification process of beech wood. The experimental investigation was conducted inside a gasifier, which can be operated in downdraft and updraft gasification system. The most important operating parameter studied in this paper was the influence of the amount of supply air on the temperature distribution, biomass consumption and syngas calorific value. The results show that...
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Pose classification in the gesture recognition using the linear optical sensor
PublikacjaGesture sensors for mobile devices, which have a capability of distinguishing hand poses, require efficient and accurate classifiers in order to recognize gestures based on the sequences of primitives. Two methods of poses recognition for the optical linear sensor were proposed and validated. The Gaussian distribution fitting and Artificial Neural Network based methods represent two kinds of classification approaches. Three types...
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Modelling of sequencing batch reactor operating at various aeration modes
PublikacjaThe presented study involved designing a computer model of a sequencing batch reactor (SBR) at laboratory scale. The data pertaining to the technical aspects of the bioreactor and quality indicators of wastewater constituted the input for the employed simulation tool, i.e. GPS-X software package. The results of a simulation involving a 12-hour operation cycle are presented in this work; each cycle included 6 phases: filling, mixing,...
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CFGFRPT Piles with a Circular Cross-Section and their Application in Offshore Structures
PublikacjaThe possibilities of using concrete piles in a polymer composite reinforced with glass fibres in offshore facilities were shown. Laboratory tests of CFGFRPT type piles compressed axially and in eccentric compression for the analysis of CFGFRPT piles were used. Methods of analysis of dynamic systems for mathematical modelling of the displacement of the hammer in the pile driving process were applied. The possibilities of combining...
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Struktura sektora bankowego w wybranych krajach Bałkanów Zachodnich
PublikacjaW sektorze bankowym zjawisko konkurencji pojawiło się później niż w tradycyjnych sektorach przemysłowych, lecz w warunkach współczesnych rozwija się bardzo dynamicznie i przybiera często agresywne formy. Sektory bankowe równią się pod względem struktur konkurencyjnych, jak i poziomów koncentracji. Celem artykułu jest zaprezentowanie struktury rynków bankowych w wybranych krajach Europy Bałkańskiej, przechodzących transformację...
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Bioaugmentation of a sequencing batch reactor with Archaea for the treatment of reject water
PublikacjaIn this study, the bioaugmentation of a sequencing batch reactor (SBR) for the treatment of reject water from wastewater treatment plant was evaluated. For the bioaugmentation step a product containing an enrichment of microorganisms from the Archaea domain was used to enhance the performance of the reactor for treating reject water. The experiment was carried out in two parallel lab-scale sequencing batch reactors. The first one...
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Low cost electrochemical sensor module for measurement of gas concentration
PublikacjaThis paper describes a low cost electrochemical sensor module for gas concentration measurement. A module is universal and can be used for many types of electrochemical gas sensors. Device is based on AVR ATmega8 microcontroller. As signal processing circuit a specialized integrated circuit LMP9l000 is used. The proposed equipment will be used as a component of electronic nose system employed for classifying and distinguishing...
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Ecological trends in machining as a key factor in sustainable production – A review
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Serum levels of stem cell factor for predicting embryo quality
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Immobilized TiO2for Phenol Degradation in a Pilot-Scale Photocatalytic Reactor
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Differential cross section minima in elastic scattering of electrons fromzinc
PublikacjaZostały obliczone położenia minimów różniczkowych przekrojów czynnych na sprężyste rozpraszanie elektronów na atomach cynku. Metoda obliczeniowa oparta jest na równaniach relatywistycznej mechaniki kwantowej. Wyniki obliczeń zostały porównane z ostatnimi danymi doświadczalnymi grupy z Uniwersytetu Belgradzkiego.
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Electron scattering on N2O - from cross section to diffusion coefficients.
PublikacjaW pracy przedstawiono wyniki pomiarów współczynników transportu: stosunek współczynnika dyfuzji w kierunku prostopadłym do pola elektrycznego do ruchliwości, stosunek współczynnika dyfuzji podłużnej do ruchliwości oraz prędkość dryfu elektronów w funkcji zredukowanego pola elektrycznego. Współczynniki zmierzono metodą Townsenda-Huxley´a a prędkość dryfu otrzymano wykorzystując metodę Bradbury - Nielsena. Zmierzone współczynniki...
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Modeling of active fiber Bragg grating underwater acoustic sensor.
PublikacjaW pracy przedstawiono wyniki modelowania nowego typu przetwornika hydroakustycznego wykorzystującego światłowodową siatkę Bragga. Siatka ta, domieszkowana jonami pierwiastków ziem rzadkich, pracuje jako laser z rozłożonym sprzężeniem zwrotnym, co pozwala na znaczne zwiększenie czułości tego prztwornika w porównaniu z rozwiązaniami wykorzystującymi siatki pasywne. W celu uzyskania równomiernego rozkładu naprężeń siatki zastosowano...
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Wdrażanie Lean Six Sigma w MŚP sektora produkcyjnego
PublikacjaW opracowaniu przedstawiono rozważania dotyczące wprowadzania metodyki Lean Six Sigma w sektorze małych i średnich przedsiębiorstw produkcyjnych. Zaprezentowano odwołującą się do kontekstu tej metodyki charakterystykę MŚP oraz zaproponowano 5 etapowy model implementacyjny uwzględniający czynniki wpływające na skuteczne i adekwatne do możliwości i potrzeb MŚP adaptowanie tego podejścia.
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Portable reactor with LTCC electrodes for production of plasma activated water
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The Tourism Sector’s Development and Popularization of Sharing Economy. The Impact on Cooperation
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A Novel Reactor for Microwave Hydrothermal Scale-up Nanopowder Synthesis
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The mycobiota of landfill leachates in the pretreatment process in a sequencing batch reactor
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C-reactive Protein as a Diagnostic and Prognostic Factor of Endometrial Cancer
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Substance P – a potent risk factor in childhood lymphoblastic leukaemia
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C-reactive protein as a diagnostic and prognostic factor of endometrial cancer
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Modeling of truss with cold-formed section and positive eccentricity in the node
PublikacjaThis work is dedicated to establishing the load carrying capacity of tensed and compressed truss’ nodes made of cold-formed open cross sections. The occurrence of bending in the truss’ nodes is the result of a specific production technology for system lattice girders assumed by the designer and the producer. The aim of this research is to present the methodology of conduct for creation of computational models that best depict the...