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The Conference Report of Why R? Turkey 2022: The First R Conference with Call For Papers in Turkey
PublikacjaWhy R? Turkey 2022 was a non-profit conference that aimed to bring Turkish R users together and encourage them to attend the R conferences. The targeted audience of the conference consisted of, data scientists, data analysts, and all R users from academia and industry. The three-day conference, which consisted of several events such as workshops, regular talks, lightning talks, short tutorials, and panels, was free of charge and...
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Identification of pollutants at the adjacent areas to the landfill site using two dimensional gas chromatography with mass spectrometry technique
PublikacjaMunicipal landfills are considered one of the main sources of air pollutants. In this article is presented the use of a modern analytical technique: a two dimensional gas chromatography to identify the substances in the atmospheric air near a waste processing plant located in Gdansk. In order to determine the types of substances occurring in different atmospheric conditions, the study was conducted from February to April 2016....
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Practical issues for the implementation of survivability and recovery techniques in optical networks
PublikacjaFailures in optical networks are inevitable. They may occur during work being done for the maintenance of other infrastructures, or on a larger scale as the result of an attack or large-scale disaster. As a result, service availability, an important aspect of Quality of Service (QoS), is often degraded. Appropriate fault recovery techniques are thus crucial to meet the requirements set by the Service Level Agreements (SLAs) between...
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Hybrid Algorithm to Protect Java’s Code from Reverse Engineering
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Automatyzacja procesu pozyskiwania wiedzy dla systemów ekspertowych.**2003,187 s. 24 rys. 7 tab. bibliogr. 248 poz. Rozprawa doktorska (2003.12.02) PG, Wydz. Elektroniki, Telekomunikacji i Aytomatyki. Promotor: Prof. dr. hab. M. Białko
PublikacjaPodczs tworzenia systemow ekspertowych występuje problem pozyskania wiedzy zdanej dziedziny. Duże korzyści daje zastosowanie szkieletowych systemów eks-pertowych z wbudowanym modulem automatycznego pozyskiwania wiedzy z istnie-jacych baz danych. Zbudowano i opisano w pracy system CLIPS-XT posiadajacyoryginalne moduły: indukcyjnego wydobywania wiedzy z baz danych za pomocą generowania drzew decyzyjnych i ich konwersji na reguły...
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Optymalne sterowanie drganiami poprzecznymi wirników maszyn.**2003, 139 s. 92 rys. 9 tab. bibliogr. 83 poz. maszyn. Rozprawa doktorska /24.05.2004/. P. Gdań., Wydz. Mechaniczny. Promotor: prof. dr hab. inż. E. Wittbrodt.
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Nowe rozwiązania metodyczne w zakresie wykorzystania denuderów w analityce zanieczyszczeń powietrza.**2002, 110 s. bibliogr. 171 poz. maszyn. Rozprawa doktorska /27.03.2002/. P. Gdań., Wydz. Chemiczny. Promotor: dr hab. inż. M. Pilarczyk.
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Nieklasyczne metody operatorowe w układach dynamicznych.**2002, 139 s. 24 rys. 2 tab. 1 tabl. bibliogr. 79 poz. maszyn. Rozprawa doktorska (26.06.2002) Promotor: dr hab. inż. Eligiusz Mieloszyk, prof. nadzw. PG
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Gospodarstwo domowe na rynku finansowym.**2002, 213 s. 12 rys. 54 tab. 14 wykr. bibliogr. 233 poz. Rozprawa doktorska (06.03.2002) Wydz. Ekon. i Zarz. PG Promotor: prof. dr hab. H. Zalewski
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Filtracja perceptualna sygnału fonicznego z zastosowaniem inteligentnychalgorytmów decyzyjnych.**2003, 160 s. 82 rys. 4 tab. bibliogr. 209 poz. ma- szyn. Rozprawa doktorska /29.04.2003./ Wydz. ETI Promotor: prof. dr hab. inż. A. Czyżewski.
PublikacjaCelem prac badawczych było opracowanie i przebadanie nowatorskiej metody re-dukcji szumu akustycznego, również i szumu niestacjonarnego, w nagraniachdźwiękowych. W tym celu opracowano metodę przetwarzania sygnału fonicznego woparciu o modelowanie matematyczne systemu słuchowego człowieka, tzw. fil-trację perceptualną, a także - metodę estymacji szumu niestacjonarnego w o-parciu o parametryzację i kwantyzację zakłócenia oraz...
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Badania nad wykorzystaniem rekombinantowego białka MutS do wykrywania muta-cji punktowych.**2002, ????s. ???rys. ??? tab. bibliogr.???poz. maszyn. Rozprawa doktorska 10.04.2002, P. Gdań. Wydz. Chem. Promotor: prof. dr hab. J. Kur.
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Metody i mikrosystemy pomiarowe impedancji do diagnostyki grubowarstwowychpowłok antykorozyjnych.**2003, 104 s. 90 rys. 18 tab. bibliogr. 106 poz. Rozprawa doktorska (04.03.2003 r.), Wydz. ETI. Promotor: prof. dr inż. R. Zielonko.
PublikacjaPraca jest rozprawą doktorską, której celem było opracowanie nowych metodpomiarowych i procedur diagnostycznych powłok antykorozyjnych, zwłaszczagrubowarstwowych, drogą identyfikacji parametrów impedancyjnych ich modeli(układów zastępczych), nadających się do realizacji praktycznej w mikrosys-temach pomiarowych przeznaczonych do pracy w terenie oraz realizacja przyk-ładowego mikrosystemu pomiarowo-diagnostycznego powłok...
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Modelowanie właściwości termicznych tkanek żywych dla potrzeb termografii dynamicznej.**2003, 134 s. 115 rys. 40 tab. bibliogr. 138 poz. maszyn. Rozprawa doktorska /14.10.2003./ Wydz. ETI Promotor: prof. dr hab. inż. A. Nowakowski
PublikacjaCelem rozprawy jest opracowanie nowych metod diagnostyki obrazowej, nieinwa-zyjnej w wybranych aplikacjach medycznych, takich jak: diagnostyka i klasy-fikacja oparzeń, kardiochirurgia, diagnostyka nowotworów piersi. Metoda ba-zuje na analizie stanów przejściowych rozkładu temperatury na powierzchnitkanki po zadziałaniu zewnętrznego źródła pobudzenia termicznego. Estymowaneparametry zastępczego modelu termicznego są skorelowane...
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Bezzałogowe środki latające (BSL) w układzie czterowirnikowego helikoptera
PublikacjaRozwój układów sterowania, kamer pracujących w świetle widzialnym oraz w podczerwieni doprowadził do wzrostu znaczenia bezpilotowych środków latających. Bezpilotowe środki latające wykorzystywane są do realizacji celów zarówno wojskowych, jak i cywilnych. Podstawowymi zaletami bezpilotowych środków latających są: małe wymiary, duża mobilność, niskie koszty wytworzenia i eksploatacji. Użytkowanie bezpilotowych środków latających...
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Removal of BTEX Compounds From Waste Gases; Destruction and Recovery Techniques
PublikacjaThe tendency for BTEX compounds (benzene, toluene, ethylbenzene, xylenes) to spread into all compartments of the environment together with their influence on both ecosystem and human health means that the emission of thesecompounds into the air is becoming the matter of worldwide concern. The legal regulations introduced by the European Union governing the assessment and management of air quality obliges member states to systematically...
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APPLICATION OF ULTRAFAST GAS CHROMATOGRAPHY TO RECOGNIZE ODOR NUISANCE
PublikacjaPotentialities of ultrafast gas chromatography applied to periodical monitoring of odor nuisance originating from a municipal landfill have been examined. The results of investigation on classification of the atmospheric air samples collected in a vicinity of the landfill during winter and summer season have been presented. The investigation was performed using ultrafast gas chromatography of Fast/Flash GC type HERACLES II by Alpha...
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Characteristics of odors emitted from municipal wastewater treatment plant and methods for their identification and deodorization techniques
PublikacjaOdors emitted from municipal wastewater treatment plants belong to a group of pollutants, which is the main cause of people complaining about atmospheric air quality. The limitation of emissions of unpleasant odors generated by wastewater treatment plants by using appropriate deodorization methods is omitted on numerous occasions. This can have a negative inflence on public trust and the quality of atmospheric air. The article...
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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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Perspektywy wykorzystania olfaktometrii i elektronicznego nosa w badaniach stanu środowiska
PublikacjaIn environmental state investigations the two approaches are dominate: field olfactometry and instrumental methods. In contradiction to classical chromatographic methods, both field olfactometry and electronic nose (e-nose) in based on the analysis of the aroma as a whole, without separating gaseous mixture (air) to individual aromatic compounds. With respect to simplicity of use and relatively short time of analysis, both systems...
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Identification of aromatic compounds in odours mixture by gas chromatography and field olfactometry techniques
PublikacjaThis paper shows the results of investigation on identification aromatic compounds present in odorous mixture in atmospheric air samples collected in a vicinity of the oil refinery LOTOS S.A., located in Gdansk, during March and April period have be presented. The studies were conducted by the use of comprehensive two-dimensional gas chromatograph equipped with a cryogenic modulator and coupled with a time-of-flight mass spectrometer,...
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Numerical Analysis of Recharge Rates and Contaminant Travel Time in Layered Unsaturated Soils
PublikacjaThis study focused on the estimation of groundwater recharge rates and travel time of conservative contaminants between ground surface and aquifer. Numerical simulations of transient water flow and solute transport were performed using the SWAP computer program for 10 layered soil profiles, composed of materials ranging from gravel to clay. In particular, sensitivity of the results to the thickness and position of weakly permeable...
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Pressure effects on the electronic structure and superconductivity of (TaNb)0.67(HfZrTi)0.33 high entropy alloy
PublikacjaEffects of pressure on the electronic structure, electron-phonon interaction, and superconductivity of the high entropy alloy ( TaNb ) 0.67 ( HfZrTi ) 0.33 are studied in the pressure range 0–100 GPa. The electronic structure is calculated using the Korringa-Kohn-Rostoker method with the coherent potential approximation. Effects of pressure on the lattice dynamics are simulated using the Debye-Grüneisen model and the Grüneisen...
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Full scale CFD seakeeping simulations for case study ship redesigned from V-shaped bulbous bow to X-bow hull form
PublikacjaIncreasing propulsion efficiency, safety, comfort and operability are of the great importance, especially for small ships operating on windy sites like the North Sea and the Baltic Sea. Seakeeping performance of ships and offshore structures can be analysed by different methods and the one that is becoming increasingly important is CFD RANS. The recent development of simulation techniques together with rising HPC accessibility...
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Influence of orientational disorder on the optical absorption properties in hybrid metal‐halide perovskite CH3NH3PbI3. A combined DFT/TD‐DFT and experimental study.
PublikacjaAn experimental and theoretical investigation is reported to analyze the relation between the structural and absorption properties of CH3NH3PbI3 in the tetragonal phase. More than 3000 geometry optimizations were performed in order to reveal the structural disorder and to identify structures with the lowest energies. The electronic structure calculations provide an averaged band gap of 1.674 eV, which is in excellent agreement...
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Electron-impact dissociation of molecular hydrogen: benchmark cross sections
PublikacjaWe present a joint experimental and theoretical investigation of a fundamental process in atomic and molecular physics: electron impact excitation of molecular hydrogen’s (H2) most dominant transition (X1Σg+ → b3Σu+). Excitation of this state is by far the main channel that causes the dissociation of H2 into H + H atoms at low energies. The Convergent Close-Coupling (CCC) calculations predicted significant, more than factor of...
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DFT study of low-energy electron interaction with pyridine, pyrazine and their halo derivatives
PublikacjaIn this work, the density functional theory with B3LYP hybrid functional was employed to calculate quantities useful for estimating the behavior of pyridine, pyrazine and their derivatives monosubstituted with Cl or Br atom, when exposed to low-energy electron impact. Vertical electron affinities obtained in several Pople basis sets and in aug-cc-pVTZ basis set are reported. Although some of the investigated molecules do not form...
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Simple 60 GHz Switched Beam Antenna for 5G Millimeter-Wave Applications
PublikacjaA new 60 GHz band single-input switched beam antenna is proposed for the fifth-generation (5G) millimeter-wave network applications. The presented design is capable of electronically switching the main beam in two different directions via a proposed microstrip-line-to-slotline single-pole dual-throw (SPDT) switch based on commercially available p-i-n diodes. The antenna is fabricated in a low-cost printed circuit board process...
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Miniature reconfigurable antenna
PublikacjaThis work concerns the design of a miniature, low-profile reconfigurable antenna based on Huygens metamaterial sources for frequency f0 = 2.45 GHz. Two planar Huygens sources were designed consisting of near-field resonators. Sources are excited from a specially designed reconfigurable control system. Thanks to the two PIN diodes, the system can realize two cardioid radiation characteristics with...
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Adsorption of Cr(VI) in aqueous solution using sago bark (Metroxylon sagu) as a new potential biosorbent
PublikacjaThis paper investigated the ability of sago bark (Metroxylon sagu) as a new potential biosorbent in removing Cr(VI) in batch system. The optimum adsorption capacity of sago bark (Metroxylon sagu) was 61.73 mg/g achieved at pH 3, agitation rate of 100 rpm, contact time 60 min, particle size ≤32 μm, and initial concentration of Cr(VI) 1,000 mg/L at room temperature (25°C). The adsorbent regeneration was carried out using 0.01 M HNO3...
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Theory versus experiment for vacuum Rabi oscillations in lossy cavities
PublikacjaThe 1996 experiment by Brune et al. [Phys. Rev. Lett. 76, 1800 (1996)] on vacuum Rabi oscillation is analyzed by means of alternative models of atom-reservoir interaction. Agreement with experimental Rabi oscillation data can be obtained if one defines jump operators in the dressed-state basis and takes into account thermal fluctuations between dressed states belonging to the same manifold. Such low-frequency transitions could...
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Numerical Estimation of Hull Hydrodynamic Derivatives in Ship Maneuvering Prediction
PublikacjaPrediction of the maneuvering characteristics of the ship at the design stage can be done by means of model tests, computational simulations or a combination of both. The model tests can be realized as direct simulation of the standard maneuvers with the free running model, which gives the most accurate results, but is also the least affordable as it requires very large tank or natural lake, as well as complex equipment of the...
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MRI-Derived Subcutaneous and Visceral Adipose Tissue Reference Values for Children Aged 6 to Under 18 Years
PublikacjaThe assessment of body composition in pediatric population is essential for proper nutritional support during hospitalization. However, currently available methods have limitations. This study aims to propose a novel approach for nutrition status assessment and introduce magnetic resonance imaging (MRI)-derived subcutaneous and visceral fat normative reference values. A total of 262 healthy subjects aged from 6 to 18 years underwent...
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Dielectric properties of modified graphene oxide filled polyurethane nanocomposites and its correlation with rheology
PublikacjaThis study aims at investigating the dynamic mechanical, dielectric and rheological properties of reinforced polyurethane (PU) nanocomposites containing hydrophilic graphene oxide (GO) and/or hydrophobic modified graphene oxide (mGO) sheets. The organic modification of GO was performed with 4,4′-methylenebis (phenyl isocyanate) (MDI) and the samples were prepared by solvent mixing. We found that addition of mGO provides a more...
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Negocjacyjna metoda generowania protokołu uzgodnień na platformie EBXML
PublikacjaCelem standardu ebXML jest ustanowienie globalnej platformy dla biznesu elektronicznego, umożliwiającej dowolnym przedsiębiorstwom( bez względu na ich wielkość i lokalizację)poszukiwanie partnerów handlowych i realizowanie transakcji kupna-sprzedaży w oparciu o wymianę dokumentów elektronicznych o strukturze logicznej opisanej w XML.Podstawą do nawiązania kontaktu przez dowolny podmiot jest publikowany przez niego w specjalnym...
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Generalized Einstein relation in disordered organic semiconductors: Influence of the acoustic phonons–charge carriers scattering
PublikacjaIn this work, we analyze the generalized Einstein relation for disordered organic semiconductors with a non-equilibrium Druyvesteyn-type distribution function. The Druyvesteyn behavior of hot electrons in a solid state is associated with the acoustic phonons–charge carriers scattering. Such a case has been experimentally demonstrated in electroluminescent inorganic rare–earth–doped zinc chalcogenides. Therefore, we can assume that,...
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A procedure for the identification of effective mechanical parameters of additively manufactured elements using integrated ultrasonic bulk and guided waves
PublikacjaThe subject of the current work was a simple but robust novel two-stage procedure for the non-destructive determination of effective elastic constants using ultrasonic wave propagation. First, ultrasonic bulk wave velocities measured on cubic samples were used to calculate most of the elements of the stiffness matrix. Secondly, the remaining elements were determined using the dispersion curves of elastic guided waves measured on...
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Collision Strengths of Astrophysical Interest for Multiply Charged Ions
PublikacjaThe electron impact excitation and ionization processes are crucial for modeling the spectra of different astrophysical objects, from atmospheres of late-type stars to remnants of supernovae and up to the light emission from neutron star mergers, to name just a few. Despite their signifi- cance, however, little is known quantitatively about these processes for low- and medium-impact energies of, say, Ekin . 5000 eV of the free...
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A methodology for ultimate strength assessment of ship hull girder accounting for enhanced corrosion degradation modelling
PublikacjaThe presented work shows a methodology for the ultimate strength assessment of a ship hull, considering enhanced corrosion modelling. The approach is based on the classical Smith method. However, the recent findings regarding the impact of corrosion degradation on ultimate strength are incorporated. To this end, the stress–strain relationships for particular elements composing ship hull cross-section are modified using a specially...
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Double-diffusive natural convection energy transfer in magnetically influenced Casson fluid flow in trapezoidal enclosure with fillets
PublikacjaThe prime motive of this disquisition is to deal with mathematical analysis of natural convection energy transport driven by combined buoyancy effects of thermal and solutal diffusion in a trapezoidal enclosure. Casson fluid rheological constitutive model depicting attributes of viscoelastic liquids is envisioned. The influence of the inclined magnetic field governed by Lorentz field law is also considered. To raise the essence...
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Size effect at aggregate level in microCT scans and DEM simulation – Splitting tensile test of concrete
PublikacjaThe paper describes an experimental and numerical study of size effect on concrete cylindrical specimens in splitting tensile test. Own experimental campaign was performed on specimens with 5 various diameters from D = 74, 105, 150, 192 and 250 mm with hardboard loading strips (distributed load according to standard methods) scaled proportionally to the specimen diameter. The crack opening-control system was applied to obtain the...
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Investigations of size effect in concrete at aggregate level - experiments and calculations results using discrete element method
PublikacjaSize effect is a fundamental phenomenon in concrete. It is characterised by decreasing strength and increasing brittleness of concrete with increasing size. The thesis includes experimental and theoretical elements. The main goal of the thesis were investigations of a size effect at the aggregate level by taking fracture into account with the discrete element method (DEM) for various failure modes. Comprehensive experiments on...
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Experimental and Quantum Chemical Evaluation of 8-Hydroxyquinoline as a Corrosion Inhibitor for Copper in 0.1 M HCl
PublikacjaThe corrosion inhibition properties of 8-hydroxyquinoline (8-HQ) in 0.1 M HCl for copper have been investigated by using experimental (electrochemical impedance spectroscopy (EIS), dynamic electrochemical impedance spectroscopy (DEIS), and potentiodynamic polarization) and theoretical methods complemented by surface morphological examination with the aid of scanning electron microscopy (SEM) and electron dispersive X-ray spectroscopy...
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INNOVATIVE RUN FLAT SYSTEMS
PublikacjaOne of the most essential threats to the mobility of wheeled vehicles is their relatively high sensitivity to tire damage. Tires can be damaged as a result at vehicle-targeting fire, after running on a mine or an improvised charge. The purpose of the article is to analyze the current technical solutions in wheeled vehicle tires, allowing for the unobstructed use of the vehicle despite the damage of one or several tires (RUN FLAT...
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Co-simulation strategy of transient CFD and heat transfer in building thermal envelope based on calibrated heat transfer coefficients
PublikacjaThe paper presents a strategy to develop a fully transient numerical model of a heat transfer in building, using a transient CFD model of indoor air and a thermal envelope model, running in a co-simulation. The strategy relies on the utilization of RANS with a high-Re turbulence model and a wall function, which enables to use a coarse computational mesh limiting the computational time. Since wall functions give invalid heat transfer...
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Składowiska odpadów komunalnych jako źródła emisji zanieczyszczeń do środowiska
PublikacjaCelem pracy było przeprowadzenie badań mających na celu określenie związków uwalnianych do powietrza ze składowisk odpadów komunalnych oraz charakterystyka ich właściwości zapachowych i toksycznych. Próbki powietrza analizowano za pomocą techniki TD-GC-MS. Przeprowadzone badania pozwoliły na zidentyfikowanie następujących związków: styren, benzen, ksylen, toluen, etylobenzen, disiarczek dimetylu, dekan, kwas butanowy i octowy....
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Indeks jakości powietrza
PublikacjaW artykule przedstawiono użyteczne narzędzie do przekazywania informacji na temat poziomu zanieczyszczęń powietrza opinii publicznej za pośrednictwem mediów i internetu - indeks jakości powietrza. Kolejno przedstawiono; historię indeksu jakości powietrza, metodykę jego wyznaczania i przykłady zastosowań w monitoringu powietrza.
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The Role of Thermal Monitoring in Cardiosurgery Interventions
PublikacjaThe results of a research project devoted to the analysis of the value of IR-thermal imaging in monitoring the quality of cardiosurgery interventions are presented. The role of the ADT is underlined.
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„Zakochałam się w Finach, w Finlandii, w ich języku...”. Rozmowa Sabiny Lech z kierownikiem Pracowni Języka, Kultury i Gospodarki Finlandii prof. nadzw. dr hab. Katarzyną Wojan, przeprowadzona w Gdańsku w dniu 16.03.2017
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Perspektywy żeglugi promowej w Polsce na tle rozwoju rynku bałtyckiego.** 2003, 234 s. 21 rys. 65 tab, 1 wykr. bibliogr. 213 poz. Rozprawa doktorska (10.12.2003). Promotor: dr hab. A. Tubielewicz, prof. nadzw. PG
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Synteza i zastosowanie ditiofosforanów acylowych w reakcji tioacylowania.** 2002, 92 s. 86 rys. 26 tab. bibliogr. 107 poz. maszyn. Rozprawa doktorska /28.12.2001/. P. Gdań., Wydz. Chemiczny. Promotor: prof. dr hab. J. Rachoń.
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