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Large dynamic range high frequency fully differential CMOS transconductanceamplifier.
PublicationW pracy zaproponowano nową koncepcję układową w pełni różnicowego wzmacniacza transkonduktancyjnego CMOS o dużym zakresie dynamiki i szerokim pasmie częstotliwości. Przeprowadzone badania teoretyczne i symulacyjne potwierdziły małe zniekształcenia harmoniczne (THD), szerokie pasmo przenoszonych częstotliwości oraz duży zakres dynamiki dla sygnałów różnicowych.
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Determination of some off-flavors for vodka quality assessment
PublicationW pracy zostały przedstawione wyniki analizy wybranych związków karbonylowych w wódkach czystych z wykorzystaniem procedury HS-SPME/GC-ECD poprzedzonej derywatyzacją aldehydów za pomocą odczynnika PFBHA. Przeprowadzone badania wykazały, że obecność 2,3-pentanodionu i 2-butenalu skutkuje pogorszeniem jakości analizowanych wódek.
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Implementation of failover and load balancing algorithms in SIP PBX High Availability system
PublicationGoal of the project was to design a High Availability SIP VoIP system that guarantees access to additional services like auto-attendent and automatic call distribution. The realization of the project required system to have load balancing and failover algorithms implemented. From the end users’ point of view the whole system had to figure as a single element. After taking under consideration the known methods of implementations...
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Algorytmy Optymalizacji Dyskretnej - ed. 2021/2022
e-Learning CoursesIn real-world applications, many important practical problems are NP-hard, therefore it is expedient to consider not only the optimal solutions of NP-hard optimization problems, but also the solutions which are “close” to them (near-optimal solutions). So, we can try to design an approximation algorithm that efficiently produces a near-optimal solution for the NP-hard problem. In many cases we can even design approximation algorithms...
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Nowoczesne metody rekrutacji - ZZL ed. 50
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POSADZKI ANTYELEKTROSTATYCZNE W OBIEKTACH PRZEMYSŁOWYCH
PublicationZainteresowanie antyelektrostatycznymi systemami posadzkowymi jest coraz większe przede wszystkim ze względu na konieczność dostosowania obiektów do wymagań stawianych w wydanej przez Unię Europejską dyrektywy ATEX (ATmosphères EXplosibles), określającej wymagania dotyczące ochrony przeciwwybuchowej oraz przed wyładowaniami elektrostatycznymi ESD (Electro Static Discharge) na stanowisku; pracy zawarte w ESD Standard. Dotyczy...
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Thermochemistry of rare earth perovskites Na3xRE0.67−xTiO3 (RE = La, Ce)
PublicationHigh-temperature oxide melt solution calorimetry using sodium molybdate (3Na2O·4MoO3) solvent at 973 K was performed for the Na3xRE0.67−xTiO3 (RE = La, Ce) perovskite series. The enthalpies of formation of lanthanum perovskites from oxides (La2O3, Na2O, TiO2), are −107.25 ± 2.56, −93.83 ± 6.06, −80.68 ± 5.93, and −33.49 ± 4.26 kJ/mol and enthalpies of formation from elements are −1614.05 ± 5.37, −1596.44 ± 7.68, −1594.03 ± 7.58,...
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Looking for a minimum exergy destruction in hierarchical cycle
PublicationThe paper presents results of energy analysis, complemented with an exergy balance, of hierarchical thermodynamic cycle. Proposed cycle is a binary vapour cycle based on a model of real supercritical steam power plant. Energy analysis is used to preliminary optimization of the cycle and the exergy losses analysis is proposed to perform optimization of heat transfer processes, which are essential for hierarchical cycles. Proposed...
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Mn-Co spinel coatings on Crofer 22 APU by electrophoretic deposition: Up scaling, performance in SOFC stack at 850 °C and compositional modifications
PublicationCeramic coatings for metallic interconnects play a key role in limiting corrosion and chromium evaporation in solid oxide cells. This study presents the upscaling of the electrophoretic deposition (EPD) technique to process Mn-Co spinels on real-dimension Crofer 22 APU interconnects and the test in a SOFC stack. Area specific resistance of long-term test conducted for 5000 h at 850 °C demonstrated that two-steps sintering has a...
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A Simplified Method of Trend Removal to Determine Noise Observed During a Supercapacitor’s Discharging
PublicationIn this paper, new method of trend removal is proposed. This is a simplified method based on Empirical Mode Decomposition (EMD). The method was applied for voltage time series observed during supercapacitor discharging process. It assured the determination of an additive noise component after subtracting the identified trend component. We analyzed voltage time series observed between the terminals of the supercapacitor when discharged...
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Opinions and view of entrepreneurs regerding the single european Market-Analytical Model. W: Entrepreneurship and small business development in the21st century. Przedsiębiorczość i rozwój małych i średnich przedsiebiorstww XI wieku. Ed. B. Piasecki. Łódź: Uniw. Łódź**2002 s. 109-117.**2002 s. 109 - 117 Opinie i poglądy przedsiębiorców na temat Jednolitego Rynku Europejskiego - model analityczny.
PublicationArtykuł zawiera propozycje modelu czynników kształtujących świadomość pol-skich przedsiębiorców odnośnie szans i zagrożeń w związku z otwarciem gospodarki Polski na Jednolitu Rynek Europejski. Model ten musi być wykorzystany przy projektowaniu badań opinii i poglądów przedsiębiorców.
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Production activity control in a flexible machining cell considering part measuring condition. W: Computer integrated manufacturing. Advanced design and management. Ed.: B. Skołud, D. Krenczyk. Warszawa: Wydaw. Nauk.-Tech. **2003 s. 494-501, 6 rys. 1 tabl. bibliogr. 9 poz. Sterowanie procesu produkcyjnego w elastycznym gnieździe obróbkowym z uwzg- lędnieniem funkcji kontroli wytwarzanych przedmiotów.
PublicationPrzedstawiono modele struktur organizacyjnych przebiegu procesu organizacyj-nego w rzeczywistym zrobotyzowanym elastycznym gnieździe obróbki (EGO) z udziałem współrzędnościowej maszyny pomiarowej CNC. Badano eksperymentalnie występujące współzależności pomiędzy analizowanymi planami kontroli przed-miotów wytwarzanych i strategiami szeregowania operacji procesu technologi-cznego obróbki, z wykorzystaniem zintegrowanych modeli...
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User -friendly E-learning Platform: a Case Study of a Design Thinking Approach Use
PublicationE-learning systems are very popular means to support the teaching process today. These systems are mainly used by universities as well as by commercial training centres. We analysed several popular e-learning platforms used in Polish universities and find them very unfriendly for the users. For this reason, the authors began the work on the creation of a new system that would be not only useful, but also usable for students, teachers...
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Development and evaluation of headspace gas chromatography method for the analysis of carbonyl compounds in spirits and vodkas
PublicationPrzedstawiono wyniki oznaczania związków karbonylowych (po przeprowadzeniu w pochodne przy użyciu odczynnika derywatyzującego - o-PFBHA) przy wykorzystaniu techniki analizy fazy nadpowierzchniowej w połączeniu z chromatografią gazową i detektorem wychwytu elektronów(ECD). Przedstawiono optymalizację metodyki oraz wyniki uzyskane podczas próbek rzeczywistych wybranych wyrobów spirytusowych.
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The structure of the data flow in integrated urban traffic management systems – the case of TRISTAR system
PublicationThe purpose of the article is to offer some insight into the data flow architecture in the Tri-City’s integrated traffic management system called TRISTAR. To that end selected elements of TRISTAR are identified and described as well as the structure for collecting and exchanging data within different sub-systems. Finally, the article highlights how the TRISTAR system can be extended by adding new elements and modules.
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On the effective properties of foams in the framework of the couple stress theory
PublicationIn the framework of the couple stress theory, we discuss the effective elastic properties of a metal open-cell foam. In this theory, we have the couple stress tensor, but the microrotations are fully described by displacements. To this end, we performed calculations for a representative volume element which give the matrices of elastic moduli relating stress and stress tensors with strain and microcurvature tensors.
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TIME SERIES MODELING 2023/2024
e-Learning Coursesprowadzący: assoc. prof. Ján Dvorský, PhD
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Superconductivity at 2.2 K in the layered oxypnictide La3Ni4P4O2
PublicationW pracy przedstawiamy odkrycie nowego, warstwowego, związku nadprzewodzącego La3Ni4P4O2.
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Ni2X2 (X=pnictide, chalcogenide, or B) based superconductors
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Rheology of Variable Viscosity‐Based Mixed Convective Inclined Magnetized Cross Nanofluid with Varying Thermal Conductivity
PublicationCross nanofluid possesses an extraordinary quality among the various fluidic models to explore the key characteristics of flowing fluid during very low and very high shear rates and its viscosity models depend upon shear rate. The current study establishes the numerical treatment regarding variable viscosity‐based mixed convective inclined magnetized Cross nanofluid with var‐ ying thermal conductivities over the moving permeable...
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Spotkanie informacyjne dla kandydatów do Szkoły Doktorskiej
EventsW dniu 29 czerwca, o godz. 11:00 (UTC+2) , odbędzie się spotkanie informacyjne dla kandydatów, dotyczące rekrutacji do Szkoły Doktorskiej PG na r.a. 2021/2022. Dostęp na hasło: PhD
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Katarzyna Smolarz PhD
People -
Tadeu Da Silva PhD
PeopleTadeu C. da Silva, PhD in Mechanical Engineering, is an Associate Researcher at the INSA Institut national des sciences appliquées (France) and Fluminense Federal University (Brazil). https://www.researchgate.net/profile/T_Da_Silva/experience Web of Science ResearcherID P-7769-2015
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Dr. Asmaa Mahfoud Al-Hakimi PhD
PeopleDr. ASMA’A MAHFOUD HEZAM AL-HAKIMY from Yemen was born in Egypt 9th October. Received Diploma in Computer Programming in 2006 from University of Science and Technology Sanaa Yemen. Received Bachelor’s Degree in Computer Studies in 2008 from NORTHUMBRIA Newcastle University UK. Received master’s degree in Software Engineering in 2011 from STAFFORDSHIRE University, UK. Received PhD in Software Engineering from Universiti Putra Malaysia....
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Kifayat Ullah
PeoplePh.D. Scholar in the department of electrical and control engineering at Gdansk University of Technology, Poland. My research interest includes Electric drives, Power Electronics, and Renewable Energy Resources. I hold My Master of Engineering degree in Electronics and Communications Engineering from the Liaoning University of Technology, China, and a Bachelor's degree in Electrical Engineering from International Islamic University...
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Pozwolić odejść, czyli... Granice interwencji
PublicationCelem tekstu jest zwrócenie uwagi na problem ostatecznej granicy interwencji konserwatorskich wobec zabytków architektury w kontekście holistycznej koncepcji ochrony dziedzictwa. Tekst adresowany jest do polskich czytelników ze względu na szczególne odniesienia do sytuacji polskiego systemu ochrony dziedzictwa. Choć architektura należy do sfery sztuk użytkowych, większość budynków nie powstawała...
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Experience Visualizaton
PublicationSet of Experience Knowledge Structure (SOEKS) has proved its capability of storing substantial part of experience at a particular decision point. The management of SOEKS record is also proposed in many papers for example referring to concepts of Decisional DNA knowledge representation, that is a collection of a number of SOEKS. The aim of this paper is to focus on visualization and practical aspects of presenting gathered knowledge...
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Outdoor photographic documentation of the Castle in Oświęcim (Małopolskie Voivodeship)
Open Research DataThis dataset contains outdoor images of the Castle in Oświęcim (Małopolskie Voivodeship). Retrieved documentation dates from the 19th to 21st centuries. The castle consists of an early Gothic bergfried tower, built at the end of the 13th century, a two-story basement building built on a rectangular plan, and an annexe. The latest image in the dataset...
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Number of mobile banking users who log into the bank at least once a month from a mobile device (telephone or smartphone) - 2017
Open Research DataElectronic banking should be understood broadly. Therefore, taking into account also other channels, the number of users using mobile electronic devices (smartphone, tablet) should be mentioned. Also in this case, there was an increase in the number of people using this channel of access to their bank account. At the end of 2017, nearly 9 million people...
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Model analityczny budżetu czasu opóźnienia w sieci IP QoS
PublicationPodstawowym celem artykułu jest przedstawienie i przebadanie sposobu podziału opóźnienia end-to-end dla danego strumienia pakietów wzdłuż łączy ścieżki, tak aby wolne zasoby przydzielane były w sposób gwarantujący jakość, a jednocześnie miała miejsce na tej ścieżce maksymalizacja liczby przyjętych do obsługi strumieni pakietów. Proces ten może dotyczyć zarówno łańcucha domen jak i łańcucha łączy. Opisany model LSS oparty jest na...
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Comparison of Selected Neural Network Models Used for Automatic Liver Tumor Segmentation
PublicationAutomatic and accurate segmentation of liver tumors is crucial for the diagnosis and treatment of hepatocellular carcinoma or metastases. However, the task remains challenging due to imprecise boundaries and significant variations in the shape, size, and location of tumors. The present study focuses on tumor segmentation as a more critical aspect from a medical perspective, compared to liver parenchyma segmentation, which is the...
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The need for new transport protocols on the INTERNET
PublicationThe TCP/IP protocol suite is widely used in IP networks, regardless of diverse environments and usage scenarios. Due to the fact of being the basic concept of organizing the work of the Internet, it is the subject of interest and constant analysis of operators, users, network researchers, and designers. The Internet is a "living" organism in which new needs appear all the time. This is particularly important due to the emerging...
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Aplikacja do zarządzania zasobami domeny pakietowej z IP QoS
PublicationWraz z upublicznieniem Internetu i jego globalizacją pojawiła się potrzeba realizacji usług czasu rzeczywistego, a co za tym idzie potrzeba zapewnienia jakości poprzez rozróżnienie klas ruchu i traktowanie każdej z tych klas według innych reguł obsługi. W artykule przedstawiono system zarządzania zasobami domeny pakietowej opartej na architekturze DiffServ. Omawiany system pracuje w strukturze warstwowej - w warstwie zarządzania,...
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An approach to improve the time efficiency of disjoint paths calculation
PublicationFailures of network elements can be appropriately dealt with by utilization of alternate disjoint paths to provide redirection of flows affected by failures of the respective working paths. Known approaches can be broadly divided by decision on backup paths installation into proactive and reactive mechanisms, as well as based on the scope of recovery actions into local and global rerouting. There are several important scenarios...
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Cellular network quality evaluation at a university campus on the eve of 5G
PublicationThanks to the availability of mobile devices and the spread of broadband access around the world, the number of network users continues to grow. This has raised user awareness when it comes to the quality of content they consume. Many service providers and operators focus on monitoring QoN (Quality of Network) and QoS (Quality of Service) parameters, particularly those influenced by bandwidth and latency. However, for most end-users,...
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Modelowanie zmiennej krzywizny na długości toru zwrotnego rozjazdu
PublicationW pracy została przedstawiona analityczna metoda wyznaczania krzywizny toru zwrotnego rozjazdu kolejowego posiadającego na swojej długości odcinki zmiennej krzywizny. Taki rozjazd jest dedykowany w głównym stopniu kolejom dużych prędkości. Rozpatrzono dwa odrębne przypadki obejmujące liniowy przebieg krzywizny oraz przebieg nieliniowy, w postaci wielomianowej. Uzyskane rozwiązania problemu pozwalają na przyjmowanie dowolnych wartości...
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Przebieg prywatyzacji polskich przedsiębiorstw państwowych w latach 1990 - 2002
PublicationProces przekształceń własnościowych jest w Polsce konsekwentnie realizowany od kilkunastu lat. Celem artykułu było przedstawienie skali i dynamiki prywatyzacji polskich przedsiębiorstw państwowych na przełomie 13 lat, z uwzględnieniem jej podstawowych metod i ze względu ich struktury według EKD, w przekroju terytorialnym, oraz pod wzgledem ich rozmiarów.
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MSRL 2.0. as a new method for research education on urban issues
PublicationThe MSRL 2.0. research is focused on the Baltic Sea Region (BSR) as a multidimensional urban phenomenon with Gdansk acting as a hub for the research teams. The idea of the MSRL 2.0. is to promote the collaboration of professionals and graduate and PhD students by bringing together the mentor(s) with a local research team sharing experiences and proposing strategic recommendations to strengthen sustainable urban development initiatives...
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Seaweed as a resource for Anaerobic Digestion
PublicationExtensive growth of algae contributes to disruptive changes to the water ecosystems. This is mainly caused by redundant nutrients that are washed off the land and end up in waters. Tackling eutrophication by recovery of nutrients can be a solution to the problem. Cast marine biomass can be a resource for renewable energy technologies like anaerobic digestion. Such approach can contribute to the transition to a circular bio-economy and...
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Modal FEM Analysis of Ferrite Resonant Structures
PublicationThe finite-element method (FEM) is applied for modal analysis of ferrite-loaded spherical resonators. To improve the efficiency of the numerical calculations, the body-of-revolution (BOR) technique is utilized. Due to the frequency-dependent ferrite permeability, FEM leads to a nonlinear eigenvalue problem that is challenging to solve. To this end, Beyn’s method is proposed. The effectiveness of the proposed approach is confirmed...
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A collection of directed graphs for the minimum cycle mean weight computation
Open Research DataThis dataset contains definitions of the 16 directed graphs with weighted edges that were described in the following paper: Paweł Pilarczyk, A space-efficient algorithm for computing the minimum cycle mean in a directed graph, Journal of Mathematics and Computer Science, 20 (2020), no. 4, 349--355, DOI: 10.22436/jmcs.020.04.08, URL: http://dx.doi.org/10.22436/jmcs.020.04.08 These...
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Number of active debit cards issued to individual customers (2017)
Open Research DataAt the end of the fourth quarter of 2017, financial institutions (including non-banking ones, e.g. SKOK) serviced 25.8 million debit cards (excluding credit card data) of individual clients. This means an increase by 1.3 million cards compared to the same period in 2016. The largest number of cards was issued and serviced by Bank PKO BP - 6.81 million,...
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[Soft Skills] Intellectual Property Protection
e-Learning Courses{mlang pl} Soft Skills Zajęcia obowiązkowe dla doktorantów I roku Prowadzący: Justyna Pawłowska, PhD, Rzecznik Patentowy PG Liczba godzin: 5 {mlang} {mlang en} Soft Skills Obligatory course for 1st -year PhD students Academic teacher: Justyna Pawłowska, PhD, Rzecznik Patentowy PG Total hours of training: 5 teaching hours {mlang}
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Michał Stopa
PeoplePhD Candidate & Officer Of the Watch PhD Student at Gdansk University of Technology, searching for innovative solutions in navigation to improve safety of the ship and support navigators. Experience of Ro-Ro/Passengers ships and Tankers.
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A wireless network for off-shore marine research
PublicationThis paper presents functionality, the most important technology developments and potential use cases of digital communication system, developed to facilitate selected tasks commonly required during off-shore operations and marine research, including: broadband information sharing between platforms isolated from an on-shore communication infrastructure, acquisition of large data-sets from variety of off-shore...
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Remote command and control capabilities for data acquisition systems provided by delay-tolerant network mechanisms
PublicationThe paper presents an assessment of a remote device reconfiguration service employing a Delay Tolerant Network (DTN) mechanisms. This service has been implemented as a part of a communication appliance dedicated to marine data transfer in off-shore and open sea areas. The service has been successfully deployed and validation test have been completed. The practical use-case has been defined as remote access to the equipment operating...
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Evaluation of time-efficiency of disjoint paths calculation schemes
PublicationThe concept of alternate paths has been shown in the literature to provide fast response of a network to failures of its elements (nodes/links) affecting flows along the primary communication paths. Various approaches have been proposed to reduce the time necessary to redirect the respective flows onto the alternate paths. In this paper, we focus on another important objective, that so far has not received much attention, i.e.,...
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The protective properties of graphene oxide coatings functionalized with phosphorus atoms.
PublicationRecently, electrophoretically deposited graphene oxide coatings are commonly applied as an anti-corrosion layer. However, improper adjustment of electrophoretic deposition (EPD) parameters as well as the hydrophilic nature of graphene oxide contribute to the formation of defects in the coatings and the increase in the wetting properties, respectively, and thus lead to a reduction of protective properties. The growth of wetting...
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Fabrication of anti-corrosion nitrogen doped graphene oxide coatings by electrophoretic deposition
PublicationThis work assesses anti-corrosion properties of graphene and N-doped graphene coatings deposited on copper by an electrophoretic method. Graphene oxide (GO) precursor was synthesized by an improved Hummers' method, whereas N-doping was performed hydrothermally in the presence of ammonia. After nitrogenation, doped graphene oxide samples (NGO) contained a reduced amount of oxygen and about 9% w/w nitrogen as pyridinic, pyrrole,...
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Assessment of the Environmental Impact of a Car Tire throughout Its Lifecycle Using the LCA Method
PublicationThere are numerous threats to the natural environment that pose a significant risk both to the environment and to human health, including car tires. Thus, there is a need to determine the impact of the life cycle of car tires on the environment, starting with the processes of raw materials acquisition, production, and ending with end-of-life management. Therefore, the authors of this study chose to do research on passenger car...