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Effects of La0.8Sr0.2MnO3 and Ag electrodes on bismuth-oxide-based low-temperature solid electrolyte oxygen generators
PublicationIn this study, La0.8Sr0.2MnO3 (LSM) was used as the ceramic electrode in a (Bi1.50Y0.50)0.98Zr0.04O3+δ (BYO)-based solid electrolyte oxygen generator (SEOG) and its performance was compared with that of a previously studied high-fire Ag electrode. Among La0.6Sr0.4Co0.2Fe0.8O3, LaNi0.6Fe0.4O3, Cu1.4Mn1.6O4, and LSM materials, only LSM materials did not trigger any chemical reaction or interdiffusion with BYO at temperatures up to...
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Tomasz Maria Boiński dr inż.
PeopleI’m associated with the University since the year 2000 when I started my studies in Computer Science on the Faculty of Electronics, Telecommunications and Informatics. After graduating with honors in 2005, I applied for doctoral studies. During his studies and immediately afterward I was involved in cooperation with Hogart from Warsaw, in the implementation of business solutions in Gdynia company Elektronika SA (Infor FMS SunSystems)...
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Procesy i efektywność usuwania zanieczyszczeń z odcieków ze składowisk odpadów komunalnych w oczyszczalniach hydrofitowych
PublicationOczyszczanie odcieków z SOK jest jednym z najbardziej istotnych problemów ekologicznych na świecie. Odprowadzenie odcieków do oczyszczalni ścieków komunalnych jest przeważnie niemożliwe, ze względu na ich zmienną ilość oraz skład, bardzo wysokie stężenia ChZT i azotu amonowego, a także obecność trwałych zanieczyszczeń organicznych (TZO) oraz metali ciężkich. Najlepszym rozwiązaniem jest oczyszczanie wód odciekowych na terenie składowiska....
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Production of certified reference materials - homogeneity and stability study based on the determination of total mercury and methylmercury
PublicationReference materials (RMs) play an important role in all elements of the quality assurance system of measurements. In this work, ``package'' 4 new CRMs (bottom sediment, herring tissue, cod tissue, cormorant tissue) were prepared and characterised to carry out the quality control in monitoring analysis of mercury and methylmercury in environmental samples. Materials - candidates were collected in Poland and south part of the Czech...
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Organic-inorganic materials for fast charging-discharging processes in energy storage devices
PublicationPraca dotyczy materiału kompozytowego złożonego z poli(3,4-etylenodioksytiofenu) i heksacyjanokobaltanu żelaza. Materiał został otrzymany elektrochemicznie bezpośrednio na elektrodzie tytanowej metodą jednoetapowa z zawiesiny zawierającej monomer (EDOT) oraz Fe3[Co(CN)6]2 w postaci proszku. Warstwy pEDOT/FehcCo otrzymane potencjostatycznie ładunkiem od 0,6 do 1,5 C/cm2 charakteryzują się różną grubością (od 1,9 do 4 μm) zależną...
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Radiosensitization of DNA in presence of Pt(II)-based compounds
PublicationX-ray irradiation of plasmid DNA in presence of platinum (II)-based compounds was carried out in order to assess the radiosensitization capabilities of these drugs. In present investigations pBR322 plasmid DNA was used to monitor the effectiveness of chosen compounds in inducing strand breaks. Samples were incubated in the presence of potential radiosensitisers: platinum (II) bromide and cis-diamminedibromoplatinum (II). The results...
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Arylated carbon nanotubes for biobatteries and biofuel cells
PublicationSinglwalled carbon nanotubes (swcnts)covalently phenylated, napthylated or terphenylated were used for the construction of cathodes in a biobattery and in a biofuel cell. zn is the anode in the biobaterry and single-walled carbon nanotubes are covalently modified with glucose oxidase/catalase (swcnt-gox/cat) and the biofuel cell anode. the cell parameters were determined and the potentials of each of the electrodes under cell working...
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CGO as a barrier layer between LSCF electrodes and YSZ electrolyte fabricated by spray pyrolysis for solid oxide fuel cells
PublicationPerovskite La0.6Sr0.4Co0.2Fe0.8O3 − δ (LSCF) is often used as a cathode material for solid oxide fuel cells (SOFC) due to high mixed ionic and electronic conductivity and good catalytic activity. Unfortunately, sintering of the LSCF cathode together with the yttria stabilized zirconia (YSZ) electrolyte, leads to formation of the La2Zr2O7 and SrZrO3 phases in the interface. These phases increase the resistance of the cell. To avoid...
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Dopants and gas modifiers in ion mobility spectrometry
PublicationThe ion mobility techniques, including the most commonly used drift-tube ion mobility spectrometry (IMS) and differential mobility spectrometry (DMS), are used successfully for the detection of a wide range of organic compounds in the gas phase. In order to improve detection quality, admixtures are added to gas streams flowing through the detector. Dopants mostly prevent the ionization of interfering chemicals however, better detection...
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Dawid Ryś dr hab. inż.
PeopleCourses PRINCE2® Foundation Certificate in Project Management Tire-Pavement Interaction course Micromechanical Analysis of Asphalt Concrete
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Metrologiczne Zastosowanie CPS 2022/2023
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Metrologiczne Zastosowanie CPS 2023/2024
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Locust bean gum as green and water-soluble binder for LiFePO4 and Li4Ti5O12 electrodes
PublicationLocust Bean Gum (LBG, carob bean gum) was investigated as an environmentally friendly, natural, and water-soluble binder for cathode (LFP) and anode (LTO) in lithium-ion batteries (Li-ion). For the frst time, we show LBG as an electrode binder and compare to those of the most popular aqueous (CMC) and conventional (PVDF) binders. The electrodes were characterized using TGA/DSC, the galvanostatic charge–discharge cycle test, cyclic...
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A novel concept of negative CO2 emission power plant for utilization of sewage sludge
PublicationCarbon Capture and Storage (CSS) technology is considered an important “bridge technology”, allowing effective abatement of CO2 emissions for power units using fossil fuels. However, if biomass is used in a power plant, equipped with CCS system, negative CO2 emissions can be achieved. In practice, wide development of such technologies would enable not only reduction of CO2 emissions, but also reversal of the harm done so far. In...
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Development of Local IDF-formula Using Controlled Random Search Method for Global Optimization
PublicationThe aim of the study is to present the effective and relatively simple empirical approach to rainfall Intensity-Duration-Frequency-formulas development, based on Controlled Random Search (CRS) for global optimization. The approach is mainly dedicated to the cases in which the commonly used IDF-relationships do not provide satisfactory fit between simulations and observations, and more complex formulas with higher number of parameters...
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Rural domestic wastewater treatment in Norway and Poland: experiences, cooperation and concepts on the improvement of constructed wetland technology
PublicationThis article describes Norwegian and Polish experiences concerning domestic wastewatertreatment obtained during nearly 20 years of operation for constructed wetland (CW) systemsin rural areas and scattered settlements. The Norwegian CW systems revealed a highperformance with respect to the removal of organic matter, biogenic elements and faecalindicator bacteria. The performance of the Polish CW systems was unstable, and varied...
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Structure and electrical properties of Y, Fe-based perovskite mixed conducting composites fabricated by a modified polymer precursor method
PublicationIn this work, samples of Y0.07Sr0.93Ti1-xFexO3-d with 20, 40, 60 and 80 mol% of iron amount were prepared by a low-temperature polymer precursor method. The SEM-EDS analysis proved that analyzed Y0.07Sr0.93Ti1-xFexO3-d samples were composites of two Ti- and Fe-rich perovskite samples. This kind of composite consists of two phases in which one has a good ionic and the other electronic conductivity, which makes such a composite a...
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Preferences and Transport Behavior of Gdansk Residents in the Light of the Result of Complex Traffic Survey
PublicationPreferences and transport behavior of the population are a fundamental aspect of research in public transport. Identifying the basic postulates of transport, the factors determining the specific behavior of transport and modal split allow to analyze the differences between the groups singled passengers and to prepare better offer of an urban transport. In Poland, still in many cities urban transport research is conducted ad hoc,...
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“Dilute & Shoot” approach for rapid determination of trace amounts of nicotine in zero-level e-liquids by reversed phase liquid chromatography and hydrophilic interactions liquid chromatography coupled with tandem mass spectrometry-electrospray ionization
PublicationTwo analytical procedures are proposed where HILIC and RPLC techniques are coupled with tandem mass spectrometry detection for rapid determination of trace amounts of nicotine in zero-level liquids for electronic cigarettes. Samples are prepared on the basis of the approach “dilute & shoot” which makes this important step quick and not complicated. The chromatographic separation was carried out on a Zorbax XDB column (RPLC method)...
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Kinetics of photochromic reactions in a 10-membered dibenzoazo crown ether
PublicationPrzedstawiono rezultaty pomiarów kinetyki fotochromowych reakcji dla jednego z serii eterów koronowych zawierających fragment azobenzenowy. Badano 10-członową dibenzoazokoronę, która ulega odwracalnej foto i termicznej izomeryzacji, podobnie jak macierzysty azobenzen. Eksperymenty były prowadzone w matrycy pMMA. Reakcja izomeryzacji monitorowana była spektrofotometrycznie. Czynnik przedwykładniczy dla termicznej izomeryzacji cis-trans...
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Neuroprotective Effects of Cannabidiol in Hypoxic Ischemic Insult. The Therapeutic Window in Newborn Mice
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Modeling two phase flow in large scale fractured porous media with an extended multiple interacting continua method
PublicationWe present a two phase flow conceptual model, the corresponding simulator (2pMINC) and a workflow for large-scale fractured reservoirs, based on a continuum fracture approach which uses the multiple interacting continua (MINC) method complemented with an improved upscaling technique. The complex transient behavior of the flow processes in fractured porous media is captured by subgridding the coarse blocks in nested volume elements...
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Analiza działania blokady kołysaniowej zabezpieczenia odległościowego w przekaźniku RED670 ABB
PublicationReferat podejmuje tematykę działania zabezpieczeń impedancyjnych linii elektroenergetycznej typu RED670 w czasie kołysań mocy. Przedstawiono wyniki działania zabezpieczenia przy wielokryterialnych analizach wykonanych z wykorzystaniem testera CMC 256-6. Analizy uzupełnione są o badania symulacyjne dotyczące dużej elektrowni wodnej.
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Analogowe filtry pasma podstawowego scalonych odbiorników telefonii komórkowej.
PublicationDążenie do obniżenia poboru mocy w odbiornikach telefonii komórkowej zmusza do poszukiwania nowych rozwiązań układowych. Jednym z bloków odbiornika GSM jest dolnoprzepustowy filtr pasma podstawowego. W referacie przedstawiono trzy scalone analogowe filtry pasma podstawowego wykonane w technologii CMOS.
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Opinia naukowo-techniczna dotycząca wyników badań statycznych i dynamicznych nośności pali prefabrykowanych wbijanych o wym. 40×40 cm podpór obiektów mostowych na budowie drogi ekspresowej S61, Ostrów Mazowiecka – Szczuczyn
PublicationOpiniowanie wyników badań nośności pali
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Multiple access in ad-hoc wireless LANs with noncooperative stations
PublicationA class of contention-type MAC protocols (e.g., CSMA/CA) relies on random deferment of packet transmission, and subsumes a deferment selection strategy and a scheduling policy that determines the winner of each contention cycle. This paper examines contention-type protocols in a noncooperative an ad-hoc wireless LAN setting, where a number of stations self-optimise their strategies to obtain a more-than-fair bandwidth share. Two...
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Thermodynamics of micellization of imidazolium ionic liquids in aqueous solutions
PublicationPodobieństwo pomiędzy strukturami niektórych cieczy jonowych, a surfaktamtami jonowymi wskazuje na możliwość wykazywania, przez te związki, tendencji do agregacji i adsorpcji na powierzchniach międzyfazowych. Mierząc w różnych temperaturach przewodnictwo elektryczne w funkcji stężenia oznaczono temperaturę Kraffta i zależność temperaturową krytycznego stężenia micelizacji (CMC) dla czterech, różniących się długościami łańcucha,...
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Bile conjugation and its effect on in vitro lipolysis of emulsions
PublicationBile Salts (BS) are responsible for stimulating lipid digestion in our organism. Gut microbiota are responsible for the deconjugation process of primary conjugated to secondary unconjugated BS. We use two structurally distinct BS and characterize the rate of lipolysis as a compound parameter. A static in-vitro digestion model as well as meta-analysis of literature data has been performed to determine the most influential factors...
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Synthesis of Combretastatin A-4 Analogs and their Biological Activities
PublicationCombretastatin A-4 (CA-4) is a natural product, which consists of two phenyl rings, linked by an ethylene bridge. CA-4, inhibitor of polymerization of tubulin to microtubules, possesses a strong antitumor and anti-vascular properties both in vitro and in vivo. Previous studies showed that disodium phosphate salt of CA-4, a water-soluble prodrug is well tolerated at therapeutically useful doses. However, it should be noted that...
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ZnO-decorated green-synthesized multi-doped carbon dots from Chlorella pyrenoidosa for sustainable photocatalytic carbamazepine degradation
PublicationThe promising green synthesis of carbon dots (CDs) from microalga Chlorella pyrenoidosa was achieved using simple hydrothermal and microwave-assisted methods. Doping of nanomaterials by nonmetals (N, S, and P) was confirmed by X-ray photoelectron spectroscopy (XPS), while the existence of metals in the CDs was confirmed by inductively coupled plasma optical emission spectroscopy (ICP-OES) and transmission electron microscopy (TEM),...
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Tuning Electrochemical Performance by Microstructural Optimization of the Nanocrystalline Functional Oxygen Electrode Layer for Solid Oxide Cells
PublicationFurther development of solid oxide fuel cell (SOFC) oxygen electrodes can be achieved through improvements in oxygen electrode design by microstructure miniaturisation alongside nanomaterials implementation. In this work, improved electrochemical performance of an La0.6Sr0.4Co0.2Fe0.8O3-d (LSCF) cathode was achieved by the controlled modification of the La0.6Sr0.4CoO3-d (LSC) nanocrystalline interlayer introduced between a porous...
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Polyurethane based hybrid ciprofloxacin-releasing wound dressings designed for skin engineering purpose
PublicationPurpose Even in the 21st century, chronic wounds still pose a major challenge due to potentially inappropriate treatment options, so the latest wound dressings are hybrid systems that enable clinical management, such as a hybrid of hydrogels, antibiotics and polymers. These wound dressings are mainly used for chronic and complex wounds, which can easily be infected by bacteria. Materials and methods Six Composite Porous Matrices...
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System load impact on VRRP advertisements delay
PublicationThe aim of the paper is to show how system load can affect network tasks (especially VRRP advertising depending on factors such as kernel schedu-ler [3] version, kernel settings and load priority. Two versions of the Linux kernel will be used: 2.6.22 (with "O(1) scheduler) and 2.6.23 (with "CFS" scheduler). "vrrpd" version 0.4 is used as an VRRP protocol implementation.
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Inteligentny planista systemu operacyjnego Linux zorientowany na obsługę zadań sieciowych
PublicationZaprezentowano nowy algorytm planisty systemu operacyjnego Linux zorientowanego na obsługę zadań sieciowych. Przedstawiono koncepcje algorytmu takiego planisty. Dokonano analizy możliwości adaptacji jądra systemu Linux do automatycznego wykrywania zadań sieciowych. Zaprezentowano testy porównawcze prototypu implementacji autorskiego algorytmu z obecnie używanym planistą Linuksa CFS.
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Series of MI[Co(bpy)3][Mo(CN)8]·nH2O (MI = Li (1), K (2), Rb (3), Cs (4); n = 7−8) Exhibiting Reversible Diamagnetic to Paramagnetic Transition Coupled with Dehydration−Rehydration Process
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Wzmacniacz triodowy CMOS
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Simulation of electric hearing - influence of simulation parameters on quality of output signal
PublicationW środowisku programistycznym Matlab stworzono symulację słuchu elektrycznego pacjenta implantowanego. W symulacji zastosowano algorytm przetwarzania wykorzystywany w komercyjnych systemach implantów ślimakowych - CIS (Continuous Interleaved Sampling). W pracy zbadano wpływ ilości kanałów, jak i innych parametrów sygnałów wyjściowych przy zastosowaniu sygału mowy jako sygnału wejściowego symulacji.
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Reactive Sintering of Ground Tire Rubber (GTR) Modified by a Trans-Polyoctenamer Rubber and Curing Additives
PublicationThe proposed method of ground tire rubber (GTR) utilization involves the application of trans-polyoctenamer rubber (TOR), a commercially available waste rubber modifier. The idea was to investigate the influence of various curing additives (sulfur, N-cyclohexyl-2-benzothiazole sulfenamide (CBS), dibenzothiazole disulfide (MBTS) and di-(2-ethyl)hexylphosphorylpolysulfide (SDT)) on curing characteristics, physico-mechanical, thermal,...
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Kolmatacja złóż hydrofitowych z pionowym przepływem ścieków w warunkach niedotlenienia
PublicationNa podstawie uzyskanych wyników badań dotyczących wpływu ograniczonego natlenienia złóż VF-CW na kolmatację sformułowano następujące wnioski:1. Obecność zawiesiny w ściekach miała wpływ na szybkość biodegradacji doprowadzanej substancji organicznej. Ścieki dopływające do Wieszyna ulegały stabilizacji biochemicznej dwukrotnie wolniej niż ścieki pochodzące z Wiklina. Przyczyną niższej szybkości biodegradacji było wyższe stężenie...
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Processes of enhancing the intelligence of Learning Organizations on the basis of Competence Centers
PublicationThe process of organizational learning and proper knowledge management became today one of the major challenges for the organization acting in the knowledge-based economy. According to the observations of the authors of this paper the demand for formalization of knowledge management processes and organizational learning is particularly evident in research institutions, established either by the universities, or the companies. The...
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Nonreciprocal properties of elliptical ferrite coupled line junction
PublicationIn this paper the nonreciprocal properties of el-liptical ferrite coupled line (EFCL) junction are examined. In the analysis the technique combining spectral-domain approach (SDA) with coupled-mode method (CMM) is applied. The nu-merical results concerning gyromagnetic coupling coefficient of ferrite coupled lines and scattering matrix of EFCL junction are presented. The obtained results are validated with the use of commercial...
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Lateral diffusion coefficients in membranes measured by resonance energy transfer and a new algorithm for diffusion in two dimentions
PublicationOpisano wyniki pomiarów współczynników dyfuzji w membranach przy wykorzystaniu rezonansowego przekazywania energii wzbudzania. Donorem był kompleks metaloorganiczny renu o czasie życia ok. 3ćs, co pozwalało na pomiary współczynników dyfuzji mniejszych od 10 cm2/s. Zmierzono współczynniki dyfuzji w membranach typu DMPG i DOPC w różnych temperaturach.
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Oscylator sinusoidy zespolonej z bezpośrednią syntezą cyfrową (DDS)
PublicationIdea oscylatora DDS zakłada generowanie liniowej fazy chwilowej w układzie akumulatora. Przebieg ten przy użyciu funkcji trygonometrycznych sin(.) i cos(.) przekształcony jest do współrzędnych kartezjańskich. W pracy szczególną uwagę poświęcono prostocie implementacji w układach programowalnych, przy zachowaniu dobrych parametrów. Opisany został również dodatkowy układ precyzyjnego strojenia częstotliwości.
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Wpływ azotowania jarzeniowego na niszczenie wodorowe stali przy stałym obciążeniu = Influence of plasma nitriding on steelhydrogen degradation under constant load
PublicationPrzedstawiono wyniki badań wpływu warstwy azotowanej jarzeniowo na podatność stali stopowej 34CrAlNi7-10 na niszczenie wodorowe, wyznaczoną w próbie stałego obciążenia w środowisku kwaśnym przy polaryzacji katodowej o gęstości prądu 1 mA/cm2.Określano odporność na pękanie w czasie 200 godz. dla obciążeń równych 0,88-0,96 siły zrywającej.
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Sulfonated poly(benzoyl paraphenylene) as a membrane for PEMFC: Ex situ and in situ experiments of thermal and chemical stability
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A Comprehensive Analysis of Deep Neural-Based Cerebral Microbleeds Detection System
PublicationMachine learning-based systems are gaining interest in the field of medicine, mostly in medical imaging and diagnosis. In this paper, we address the problem of automatic cerebral microbleeds (CMB) detection in magnetic resonance images. It is challenging due to difficulty in distinguishing a true CMB from its mimics, however, if successfully solved it would streamline the radiologists work. To deal with this complex three-dimensional...
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Importance of Conjugation of the Bile Salt on the Mechanism of Lipolysis
PublicationWe aim to advance the discussion on the significance of the conjugation of bile salts (BS) in our organism. We hypothesize that conjugation influences the rate of lipolysis. Since the rate of lipolysis is a compound parameter, we compare the effect of conjugation on four surface parameters, which contribute to the rate. Since deconjugation is due to gut microbiota, we hypothesize that microbiota may affect the rate of lipolysis....
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Application of Analytic Signal and Smooth Interpolation in Pulse Width Modulation for Conventional Matrix Converters
PublicationThe paper proposes an alternative and novel approach to the PWM duty cycles computation for Conventional Matrix Converters (CMC) fed by balanced, unbalanced or non–sinusoidal AC voltage sources. The presented solution simplifies the prototyping of direct modulation algorithms. PWM duty cycles are calculated faster by the smooth interpolation technique, using only vector coordinates, without trigonometric functions and angles. Both...
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Escherichia coli Strains with Virulent Factors Typical for Uropathogens were Isolated from Sinuses from Patients with Chronic Rhinosinusitis—Case Report
PublicationEscherichia coli were isolated from three patients with chronic rhinosinusitis (CRS) by intraoperative sinus tissue biopsy. Taking into account the unusual replicative niche and previous treatment failures, it was decided to focus on the virulence and drug resistance of these bacteria. The strains turned out to be multi-sensitive, but the rich virulence factors profile of bacteria typical for phylogenetic group B2 deserved attention....
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Novel Complementary Multiple Concentric Split Ring Resonator for Reliable Characterization of Dielectric Substrates with High Sensitivity
PublicationAccurate characterization of dielectric substrates with high sensitivity remains an important challenge in a variety of industrial applications. This paper proposes an innovative strategy to address this challenge by developing and optimizing a unique Complementary Multiple Concentric Split Ring Resonator (CMC-SRR). The major goal is to propose a sensor design with increased sensitivity and reliability for dielectric characterization....