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Search results for: SP
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Bifunctional catalyst based on molecular structure: Spherical mesoporous TiO2 and gCN for photocatalysis
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Specificity of Infant Digestive Conditions: Some Clues for Developing Relevant In Vitro Models
PublicationDigestion of nutrients is an essential function of the newborn infant gut to allow growth and development and understanding infant digestive function is essential to optimize nutrition and oral drug delivery. Ethical considerations prohibit invasive in vivo trials and as a consequence in vitro assays are often conducted. However, the choice of in vitro model parameters are not supported by an exhaustive analysis of the literature...
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Spatial Information Research
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Journal of Spatial Science
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NETWORKS & SPATIAL ECONOMICS
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Spatial Economic Analysis
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Spatial Cognition and Computation
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Cultural Heritage in Spatial Planning
PublicationThe cultural heritage objects of each country should have a major impact on the development of space. Unfortunately, most often the investment needs prevail and only the most precious historical objects are protected. Thus often a monument is preserved, but its surroundings (which put it in context) are lost forever. This article addressed the issues of cultural heritage in relation to the spatial planning system in Poland. The...
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Spatial planning on regional level
PublicationPolish spatial planning results from typical for countries of Central and Eastern Europe transition . They have undergone the transformation from decentralized management system based on the dominance of state to the system of representative democracy, based on self-government administration; also territorial on regional level.
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Spectroscopic evaluation of a low power atmospheric pressure mixed argon–helium microwave induced plasma combined with the chemical generation of volatile species for the optical emission spectrometric determination of arsenic, antimony and mercury
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ZzP - W świecie dziesiętnym i binarnym - Spotkanie Akademickie 14.11.2020 r.
e-Learning CoursesSpotkanie będzie się składać z trzech części: wykładu, ćwiczeń i laboratoriów. Na wykładzie poznamy i nauczymy się algorytmów zamiany zapisu liczb naturalnych między systemami o różnych podstawach, w szczególności systemami binarnym, dziesiętnym i szesnastkowym. Rozumiejąc system binarny omówimy jego zastosowanie do kodowania informacji. Porozmawiamy o kodach ASCII oraz o adresach IP. Ćwiczenia praktyczne pozwolą uczniom przetestować...
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Zdolni z Pomorza - Fizyka skoków narciarskich - Spotkanie Akademickie 15.05.2021 r.
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Italian Journal of Gender-Specific Medicine
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Spotkanie i spacer po kampusie z autorami albumu
EventsSpotkanie i spacer po kampusie z autorami albumu KAMPUS POLITECHNIKI GDAŃSKIEJ. Szczegóły: https://pg.edu.pl/pg-otwarta/
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Determination of resonances by the optimized spectral approach
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Categorization of Wikipedia articles with spectral clustering
PublicationAbstract. The article reports application of clustering algorithms for creating hierarchical groups withinWikipedia articles.We evaluate three spectral clustering algorithms based on datasets constructed with usage ofWikipedia categories. Selected algorithm has been implemented in the system that categorize Wikipedia search results in the fly.
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Spectral splittings in the Conley index theory
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Spectral sequences and detailed connection matrices
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The Maslov index and the spectral flow—revisited
PublicationWe give an elementary proof of a celebrated theorem of Cappell, Lee and Miller which relates the Maslov index of a pair of paths of Lagrangian subspaces to the spectral flow of an associated path of self-adjoint first-order operators. We particularly pay attention to the continuity of the latter path of operators, where we consider the gap-metric on the set of all closed operators on a Hilbert space. Finally, we obtain from Cappell,...
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On a comparison principle and the uniqueness of spectral flow
PublicationThe spectral flow is a well-known quantity in spectral theory that measures the variation of spectra about 0 along paths of selfadjoint Fredholm operators. The aim of this work is twofold. Firstly, we consider homotopy invariance properties of the spectral flow and establish a simple formula which comprises its classical homotopy invariance and yields a comparison theorem for the spectral flow under compact perturbations. We apply...
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From Hollow to Solid Carbon Spheres: Time-Dependent Facile Synthesis
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Template method synthesis of mesoporous carbon spheres and its applications as supercapacitors
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Converting mixed plastics into mesoporous hollow carbon spheres with controllable diameter
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Architecture of ecumenical spaces in public buildings in the 21st century: Links among the architecture of multi-faith spaces, their names, and the functions they serve in Polish airports
PublicationThis study explores the architecture and arrangement of prayer spaces in public buildings. It examines whether Polish airports have prayers spaces and whether a correlation exists between the name (e.g., “multi-faith space,” “place of prayer,” and “place of focus”) and design. The study is supported by analyses of ecumenical spaces, which have recently been brought into service andwhere a visible symbiosis exists between their...
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Spectroscopic and Wireless Sensor of Hematocrit Level
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Heptaene macrolides biosynthesis by Streptomyces species
PublicationPolyene macrolides are one of the groups of secondary metabolites, generated by microorganisms belonging to the Streptomyces genus. These compounds, containing 3 - 7 conjugated double bonds systems in their molecules exhibit high antifungal activity against a broad spectrum of fungal pathogens with heptaenes demonstrating the highest antifungal potential. At the large extent, efficiency of biosynthesis of these natural products...
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Aggregation of imidazoacridinones - spectroscopic and microcalorimetric approach
PublicationImidazoacridinones (IA) belong to a group of polycyclic heteroaromatic antitumor compounds. IA create the aggregated form in water solution. Self-association of substances is a very important phenomenon in many fields of applied chemistry. It is also fundamental model reaction of many kinds of molecular interactions such as the micelle formation of amphiphilic substances and the binding of small organic molecules to macromolecules....
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Species in the wild: a typology of innovation ecosystems
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Analysis of arsenic species in environmental samples
PublicationMany analytical methods for determining arsenic in various forms in environmental samples have been developed in recent years. The main objective of this review article is the presentation and comparison of the three principal techniques for the determination arsenic compounds, namely: hydride generation (HG), voltammetry and chromatography (liquid chromatography including high-performance liquid chromatography (HPLC), and gas...
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Spectroscopic evaluation on pseudopolymorphs of sodium naproxen
PublicationThis paper demonstrates the assessment of vibrational spectroscopy methods such as middle infrared, near infrared and Raman spectroscopy (FTIR, FT-NIR, Raman) for the identification of pseudopolymorphic forms of a model active pharmaceutical ingredient (API) - sodium naproxen (NpxNa). NpxNa, in the form of three different pseudopolymorphs, was investigated by methods dedicated for solid state characterization: DSC (differential...
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Spectroscopic evaluation on pseudopolymorphs of sodium naproxen
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Spectroscopic and wireless sensor of hematocrit level
PublicationAn optical method for hematocrit measurement has been presented. the sensor, designed and developed by authors, consists of spectroscopic set-up controlled by a microcontroller. measurement results are sent via wireless module. experiment has confirmed the ability of the sensor to determine the hematocrit with appropriate measurementaccuracy.
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Spectroscopic wireless sensor of hematocrit level
PublicationAn optical method for hematocrit measurement is presented. The sensor, designed and developed by authors, consists of a spectroscopic set-up and a microcontroller. The work of the sensor is based on measurement of intensity of two selected spectral bands. Tests confirmed the ability of the sensor to determine the hematocrit level with appropriate measurement accuracy. Measurement results can be transmitted via wireless module to...
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Application of Multivariate Adaptive Regression Splines (MARSplines) Methodology for Screening of Dicarboxylic Acids Cocrystal Using 1D and 2D Molecular Descriptors
PublicationDicarboxylic acids (DiAs) are probably one of the most popular cocrystals formers. Due to the high hydrophilicity and non-toxicity, they are promising solubilizes of active pharmaceutical ingredients (APIs). Although DiAs appear to be highly capable of forming multicomponent crystals with various compounds, some systems reported in the literature are physical mixtures the solid state without forming stable intermolecular complex....
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Quality Improvement of Wear-Resistant Coatings in Plasma Spraying Integrated with High-Energy Heating by High Frequency Currents
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Application of wet powder spraying for anode supported solid oxide fuel cell with a perowskite SrTi0.98Nb0.02O3-d anode
PublicationAnode-supported solid oxide fuel cell with SrTi0.98Nb0.02O3–d anode, yttria-stabilized zirconia electrolyte and La(Ni0.6Fe0.4) O3d cathode has been successfully fabricated and evaluated. Process of anode support fabrication has been presented. Wet powder spraying and high temperature sintering method have been studied and applied to deposit the thin electrolyte layer.In order to improve catalytic properties of the anode, it has...
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Simulation and experiments of high speed milling vibration surveillence with a use of changing spindle speed
PublicationPraca poświęcona jest nowemu podejściu do nadzorowania drgań wirujących narzędzi w nowoczesnych frezarkach. Przeprowadzono analizy dynamiczne skrawania smukłym frezem kulistym. Opisano dynamikę sterowanego układu nistacjonarnego. Jako rezultat sterowania optymalno-liniowego otrzymano program chwilowych zmian prędkości obrotowej pozwalający uzyskać redukację drgań. Metodę zweryfikowano eksperymentalnie na frezarce Alcera Gambin...
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Application of speed and load torque observers in high-speed train drive for diagnostic purposes
PublicationW artykule przedstawiono zastosowanie diagnostyczne obserwatorów prędkości obrotowej i momentu obciążenia w układzie napędowym z silnikiem asynchronicznym. System diagnostyczny jest dedykowany do napędu pociągu szybkiego. Celem diagnostycznym jest monitorowanie stanu czujnika prędkości obrotowej wału silnika oraz układu przeniesienia momentu trakcyjnego. Analiza sygnałów obliczanych w obserwatorach stanu pozwala na wykrycie uszkodzeń...
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Acoustic journal bearing – Performance under various load and speed conditions speed conditions
PublicationThe paper presents results of experimental testing aiming at finding out what effect system of piezo-electric actuators (PZTs)attached to an aerodynamic journal bearing has on the magnitude of shaft's motion within the bearing operating at specified speed and load. The results clearly demonstrate effectiveness of PZTs in mitigating the shaft's motion thus contributing to the increased stability of the bearing. This stabilizing...
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Towards simulations and experiments of high speed milling vibration surveillance by the spindle speed control
PublicationPraca poświęcona jest nowemu podejściu do nadzorowania drgań wirujących narzędzi we współczesnych frezarkach. Przeprowadzono analizę skrawania smukłym frezem kulistym. Jako rezultat sterowania optymlano-liniowego otrzymano program chwilowych zmian prędkości obrotowej pozwalający uzyskać redukację drgań. Metodę zweryfikowano eksperymentalnie.
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Speed observer of induction machine based on backstepping and sliding mode for low‐speed operation
PublicationThis paper presents a speed observer design based on backstepping and slidingmode approaches. The inputs to the observer are the stator current and thevoltage vector components. This observer structure is extended to the integra-tors. The observer stabilizing functions contain the appropriate sliding surfaceswhich result from the Lyapunov function. The rotor angular speed is obtainedfrom the non‐adaptive formula with a sliding...
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Bal Sportowca
EventsW piątek, 1 lutego br. w Gmachu Głównym Politechniki Gdańskiej odbędzie się Bal Sportowca. Impreza ta odbędzie się na naszej Uczelni już po raz czwarty. Podczas balu zostaną uhonorowane zostaną najbardziej usportowione
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Bal Sportowca
EventsBal Sportowca jest uhonorowaniem najbardziej usportowionych wydziałów naszej Uczelni oraz najlepszych sportowców reprezentujących PG na Akademickich Mistrzostwach Polski. Termin: 10.02.2017, godz. 20.00.
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Schweizerische Zeitschrift für Sportmedizin und Sporttraumatologie
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Periodicity Matters: Grating or lattice resonances in the scattering by sparse arrays of subwavelength strips and wires.
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Sparse vector autoregressive modeling of audio signals and its application to the elimination of impulsive disturbances
PublicationArchive audio files are often corrupted by impulsive disturbances, such as clicks, pops and record scratches. This paper presents a new method for elimination of impulsive disturbances from stereo audio signals. The proposed approach is based on a sparse vector autoregressive signal model, made up of two components: one taking care of short-term signal correlations, and the other one taking care of long-term correlations. The method...
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Adaptive identification of sparse underwater acoustic channels with a mix of static and time-varying parameters
PublicationWe consider identification of sparse linear systems with a mix of static and time-varying parameters. Such systems are typical in underwater acoustics (UWA), for instance, in applications requiring identi- fication of the acoustic channel, such as UWA communications, navigation and continuous-wave sonar. The recently proposed fast local basis function (fLBF) algorithm provides high performance when identi- fying time-varying systems....
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Influence of geosmin, dimethyl trisulfide, 2- and 3-methylbutan-1-ol on raw spirits quality
PublicationJakość napojów alkoholowych jest bardzo istotna dla konsumentów. Destylarnie, chcąc wytwarzać wysokiej jakości trunki, muszą określić, które składniki są odpowiedzialne za nieprzyjemny zapach pogarszając jakość otrzymywanych alkoholi. Głównym celem przeprowadzonych badań było określenie profili zapachowych próbek destylatów rolniczych różniących się jakością organoleptyczną oraz wskazanie tych składników, których obecność może...
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ANALIZA ŁOŻYSKOWANIA MŁYNÓW ORAZ ORAZ OKREŚLENIE SPOSOBÓW I CH MODERNIZACJI ETAP1/2
PublicationCelem pracy było wykonanie analizy warunków pracy łożysk młynów rudy typu MSZC, 41.02, 41.03 oraz 41.04 wraz z określeniem możliwości zwiększenia ich nośności oraz niezawodności poprzez modernizację lub zmianę konstrukcji. Przeprowadzono symulacje komputerowe czterech typów łożysk młynów określając ich nośność, wartości grubości filmu, temperaturę w filmie olejowym, straty tarcia itp. Wykonano również analizę wpływu ukosowania...
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Evaluation of headspace solid-phase microextraction for the analysis of volatile carbonyl compounds in spirits and alcoholic beverages
PublicationOpracowano metodę oznaczania C1-C6 związków karbonylowych w układzie GC-ECD w roztworach alkoholowych poprzez derywatyzację pentafluorobenzylohydroksy-aminą i mikroekstrakcję w fazie stacjonarnej z fazy nadpowierzchniowej. Zoptymalizowano warunki eksperymantalne: zawartość alkoholu, czas ekspozycji, temperaturę i sposób mieszania próbki. W metodzie tej najpierw przeprowadza się rozcieńczenie spirytusu lub napojów alkoholowych do...