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Results of the “DPDT-Auger” Research Project on Screw Displacement Piles
PublicationThe main objective of the “DPDT-Auger” research project was to test the prototype DPDT auger for forming screw displacement piles in the ground (patented in Poland in 2020). An additional aim was to develop design methods and rules for the making of such piles. The augers and piles were first tested on a model scale, and then more extensively in the real scale on experimental field plots. The results found the overall functionality...
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Artificial intelligence in architectural education - green campus development research
PublicationThe rapid advancement of artificial intelligence (AI) technologies has introduced new possibilities and challenges in design education. This article explores the need for changes and adaptations in the teaching process of design as AI-related technologies, based on image generation, transform the creative process and offer novel opportunities. In a research-by-design studio in an architectural faculty in Poland, students who utilised...
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Biological and mechanical research of titanium implants covered with bactericidal coating
PublicationThe paper concerns the biological and mechanical properties of titanium implants with an antibacterial coating. The Ti13Zr13Nb alloy samples were coated with hydroxyapatite (HAp) coatings using the electrophoretic deposition technique (EPD). Subsequently, the surface of the samples was modified with silver, copper, and nickel nanoparticles by the immersion method. Different titanium sample types (i.e. HAp-only and nanometals-enriched...
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Towards more inclusive qualitative research: the practice of interviewing neurominorities
PublicationManagement scholars increasingly focus their efforts on the development of neurodivergent human capital and the promotion of inclusive employment and decent work. However, it may be argued that existing research still suffers from the lack of a comprehensive appreciation of what neurominorities may find difficult in the research process or how they interpret what the researchers are doing. In the light of only fragmented advice...
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RESEARCH ON HYDRODYNAMIC PEEK JOURNAL BEARINGS LUBRICATED WITH WATER AND OIL
PublicationThe main purpose of the research was to determine the possibilities and experimentally test the benefits of replacing conventional oil lubrication with ecological water lubrication. Tests were carried out on a test rig for hydrodynamic radial bearings under conditions representative of the expected applications for the bearing in water turbines. Bearings made from the polymer material PEEK (polyether ether ketone) were tested under static...
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Methodology of experimental research on efficiency of hydro-mechanical automatic gearbox
PublicationThe article shortly describes the design and principle of operation of the hydromechanical gearbox and presents the methodology and design of test stands used for testing hydromechanical proto-type gearbox developed at Technical University of Gdansk. The article presents an approach according to which, in order to obtain reliable measurement data, it is necessary to separate the tests of the hydraulic and mechanical parts of the...
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Security of Cryptocurrencies: A View on the State-of-the-Art Research and Current Developments
Publication[Context] The goal of security is to protect digital assets, devices, and services from being disrupted, exploited or stolen by unauthorized users. It is also about having reliable information available at the right time. [Motivation] Since the inception in 2009 of the first cryptocurrency, few studies have been undertaken to analyze and review the state-of-the-art research and current developments with respect to the security...
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Enthalpies of formation of rare earth niobates, RE3NbO7
PublicationHigh-temperature oxide melt solution calorimetry was used to investigate energetics of a series of rare earth niobates RE3NbO7. All of investigated compounds were found to be stable in enthalpy in respect to their oxides. The enthalpy of formation from oxides becomes more exothermic as the size of the RE cation increases, a trend seen previously in other RE compounds including pyrochlores, perovskites, and phosphates. For smaller...
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Entropia w badaniach zaburzeń rytmu serca
PublicationArtykuł prezentuje zastosowanie ''Approximate Entropy'', będącej miarą stopnia złożoności szeregów czasowych, do analizy zmiennosci rytmu serca.
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Rare-earth elements in human colostrum milk
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Cutaneous larva migrans in a beach volleyball player
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Lattice dynamics of the rare-earth element samarium
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Wystawa plastyczna, XXIII Aukcja Wielkiego Serca
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Serce miasta jako muzeum sztuki narodowej
PublicationSerce miasta to przestrzeń obok bycia gdzieś, będąca kiedyś. Tak rozumiana specyfika serca miasta prowadzi do pytania o jego kompozycję rozgrywającą się w wymiarze czasowym. Rytmiczność i unikatowość składają się na kompozycję serca miasta rozumianą jako uporządkowana przestrzeń wydarzeń. Te cechy zbliżają myślenie o sercu miasta i rozumienie jego specyfiki do współczesnych teorii kształtowania muzeum sztuki. Współczesne muzeum...
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Earth wires currents calculation by tableau analysis
PublicationThe paper presents a new method to compute a phase-to-earth fault current distribution in overhead transmission line. The method is based on the tableau analysis of an unbalanced, multi-wire model of a transmission line. It allows for the calculation of current distribution in overhead earth wires along the transmission line. Additionally, it may be used to calculate currents in a tower’s earthing system as well as voltages over...
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Węzły cierne stabilizatora pola operacyjnego serca
PublicationZbudowany w wyniku współpracy gdańskiej Politechniki i Akademii Medycznej stabilizator pola operacyjnego na pracującym sercu to urządzenie niezbędne do prowadzenia operacji kardiochirurgicznych bez włączania krążenia pozaustrojowego. W pracy przedstawiono jego konstrukcję oraz badania oporów tarcia w przegubach i symulacyjne badania sztywności jego struktury. Urządzenie poprzez chwytak z parą przyssawek unosi serce i unieruchamia...
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Polski stabilizator do zabiegów by-passowania serca
PublicationW Politechnice Gdańskiej skonstruowano pierwszy polski stabilizator pola operacyjnego na pracującym sercu. Urządzenie to jest niezbędne do prowadzenia operacji kardiochirurgicznych bez włączania krążenia pozaustrojowego. Badania doświadczalne prototypów urządzenia, prowadzone na sercach zwierzęcych, jak też próby kliniczne, umożliwiły dobór elementów stabilizatora, w tym chwytaka z przyssawkami, będącego podstawowym jego członem.
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Tomografia wielorzędowa w diagnostyce czynnościowej serca.
PublicationW artykule przedstawiono skanery rentgenowskiej tomografii komputerowej wykorzystujące detektory wielowarstwowe/wielorzędowe. Zaprezentowano znaczenie wykorzystania tej nowej techniki pomiarowej w diagnostyce czynnościowej serca.
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Polyurethanes modified with natural polymers for medical application. Part II. Polyurethane/gelatin, polyurethane/starch, polyurethane/cellulose
PublicationThis paper is a literature overview of biomedical PUR modifications with natural polymers such as starch, cellulose and gelatin. Properties like biodegradability and biocompatibility of modified PUR cause that these materials may be used as wound dressings, tissue scaffolds, tissue implants and also vascular grafts.
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The electrochemical impedance spectroscopy studies of the anode material based on polymer and starch derived ceramic for lithium ion batteries
PublicationThe anode materials derived of preceramic polymer poly(1,2-dimethylsilazane) (PSN) and starch was study. Commercially available polysilazane (poly(1,2-dimethylsilazane (PSN 2M01 Gelest) was mixed with commercially available starch (POCH Gliwice). The ratio polymer/starch (PSN/starch) was 1/1 or 3/7. The polysialazane/starch blend was cross-linked at 230 ºC for 2 h followed by heating to the final temperature (500 ºC, 700 ºC and...
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Determination of Chemical Diffusion Coefficient of Lithium Ions in Ceramics Derived from Pyrolysed Poly(1,2-dimethylsilazane) and Starch
PublicationThe apparent chemical diffusion coefficient Li+ (DappLI+) in pyrolysed poly(1,2-dimethylsilazane)/starch (PSN/S) (weight ratio: 30/70) ceramic anode composite is determined by galvanostatic intermittent titration technique (GITT). The electrode material composition is C6.00N0.14H0.47O0.12Si0.13. The calculated values of DappLI+, depend on the applied potential, vary from 10-14 to 10-9 [cm2/s]. The diffusion coefficient of lithium...
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Carboxymethyl Starch/Medium Chain Fatty Acid Compositions: Rheological Changes During Storage and Selected Film Properties
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Effect of Co-Encapsulated Natural Antioxidants with Modified Starch on the Oxidative Stability of β-Carotene Loaded within Nanoemulsions
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Physico-Chemical Characterization and Biological Tests of Collagen/Silk Fibroin/Chitosan Scaffolds Cross-Linked by Dialdehyde Starch
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Clay-filled starch films. Part I: Effect of clay kind and glycerol concentration on functional properties of composites
PublicationThe aim of this work was to improve the mechanical and water barrier properties of composite filmsprepared from starch and clays, plasticized with glycerol at different concentrations. The effects ofhydrophilic Closite Naþand Nanomer PGV were compared with that exerted by organicallymodifiedmorehydrophobicNanofil2 and NanoBent ZR-1. The antimicrobial activity of compositescontaining hydrophobic clays was also investigated. The hydrophilic...
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The impact of cooking method on the phenolic composition, total antioxidant activity and starch digestibility of rice (Oryza sativa L.)
PublicationThis study investigated changes in the phenolic composition, total antioxidant activity (TAA) and starch digestibility in white and brown rice due to three different cooking procedures, and subsequent reheating of cooked rice after storage. Among the analyzed samples, brown rice showed the highest TAA and phenolic content (622.5 mg kg-1 DW). All cooking methods resulted in significant decrease of phenolic content and TAA of rice...
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Helicobacter pylori infection is associated with oxidatively damaged DNA in human leukocytes and decreased level of urinary 8-oxo-7,8-dihydroguanine
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Substantial decrease of urinary 8-oxo-7,8-dihydroguanine, a product of the base excision repair pathway, in DNA glycosylase defective mice
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The Reception of the Copernican Universe by Representatives of 17th-Century Jewish Philosophy and Their Search for Harmony Between the Scientific and Religious Images of the World (David Gans and Joseph Solomon Delmedigo)
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Research and Development at the Department of Energy and Industrial Apparatus of Gdansk University of Technology
PublicationIn the paper presented are the research and development activities at the Department of Energy and Industrial Apparatus of Gdansk University of Technology
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STABILITY OF THE INNER SLOPE OF THE POLISH DREDGDIKES RESEARCH DIKE AT STATIONARY FLOW
PublicationFor long duration of the flood the water table can appear on the slope with a problem of out-wash in the case of sand type dike. If the dike corps is covered with less permeable layer some additional push-off forces and shearing can rise in the cover. In both cases the micro stability of the inner slope should be considered at normative high water for homogeneous sand type dike or sand type dike with less permeable covers. The...
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Knowledge-Based Management as the Key Success Factor for Research and Development Organizations
PublicationA key to achieving success in project organizations lies in exemplary management of processes within those organizations, while the ongoing projects are mainly characterized by their uniqueness. The situation is no different in commercial research and development organizations (R&D) where accuracy and repeatability of elementary processes guarantees efficient and productive realization of all enterprises. R&D organizations are...
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Ekologiczna sanitacja. Część I – rozdział i zagospodarowanie ścieków szarych
PublicationW ostatnich latach, szczególnie w Europie Zachodniej (Niemcy, Austria, Szwajcaria) i krajach skandynawskich (Szwecja, Norwegia), zaobserwować można coraz większe zainteresowanie sanitacją ekologiczną (w jęz. ang. Ecological Sanitation). Zrównoważoną sanitację można zdefiniować jako sanitację, która chroni i promuje zdrowie ludzkie, nie przyczyniając się do degradacji środowiska, jest technicznie dopasowana oraz ekonomicznie akceptowalna....
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Experimental research on helical coil biomass boiler with oil as a heating fluid
PublicationThis paper presents an experimental research of helical coil biomass boiler with thermal oil heating agent. Heat exchanger consists of two coaxial helical coils swept by the flue gases. The burner is a single vertical retort connected to the fuel tank (wooden pellets). The boiler is a part of micro-power plant in which the heat from the boiler is exchanged with low-boiling HFE7100 to produce steam for a custom steam turbine. The...
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Water-Lubricated Sintered Bronze Journal Bearings—Theoretical and Experimental Research
PublicationWater lubricated bearings are used from many years in shipbuilding, hydro power and other industries because of their advantages such as: extensive serviceable life, low coefficient of friction, longevity of shaft sleeve, good abrasion resistance, low maintenance required, unit simplicity, no danger of pollution and low price. Various types of water lubricated sliding bearings have been tested at the Technical University of Gdansk...
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Development of particle accelerator technology in Europe: digest of infrastructural and research projects
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Missing Verification of Source Data in Hypertension Research: The HYGIA PROJECT in Perspective
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A comprehensive review on environmental transformation of selenium: recent advances and research perspectives
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Extraction of information from born-digital PDF documents for reproducible research
PublicationBorn-digital PDF electronic documents might reasonably be expected to preserve useful data units of their source originals that suffice to produce executable papers for reproducible research. Unfortunately, developers of authoring tools may adopt arbitrary PDF generation strategies, producing a plethora of internal data representations. Such common information units as text paragraphs, tables, function graphs and flow diagrams,...
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Research on assessment of bolted joint state using elastic wave propagation
PublicationThe work contains results of experimental investigation of elastic wave propagation in a bolted single-lap joint. Tests were carried out for the excitation perpendicular to the connection plane. In experimental studies, PZT transducers were used for both excitation and registration of ultrasonic waves. The analyses took into account varying contact conditions between the elements of the connection depending on the value of the...
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Research on a permanent magnet assisted synchronous reluctance machine with hybrid excitation
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Competences of academic tutors – research among participants of the project “Masters of Didactics”
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Research of the Theban limestone: The case of Temple of Hatshepsut in Deir el-Bahari
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Agomelatine's antiglycoxidative action—In vitro and in silico research and systematic literature review
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The relationship between entrepreneurship and economic growth: a review of recent research achievements
PublicationRozdział przedstawia przedląd najnowszych badań światowych dotyczących relacji zachodzących pomiędzy przedsiębiorczością a wzrostem gospodarczym. Autorzy prezentują własną propozycję ujęcia powiązań pomiędzy przedsiębiorczością a makroekonomicznymi efektami wzrostu z uwzględnieniem różnorodnych - tak zwanych - ''powiązań pośrednich''(intermediate linkages).
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Sustainability reporting in justice systems: a comparative research in two European countries
PublicationPurpose – That on accountability in public organizations is quite an old debate. Its introduction in judicial systems is, however, still viewed with some suspicion, due to its potential trade-off with independence and impartiality. Nevertheless, the need to respond to the demands for greater transparency and accountability has also pushed judicial organizations to establish a dialogue with a wide range of subjects. This study aims...
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Research of Accuracy of RSSI Fingerprint-Based Indoor Positioning BLE System
PublicationRadio localization in indoor environment is still a challenging task due to environment volatility. In the paper are compared achieved localization accuracies for RSSI-Fingerprinting method utilizing Bluetooth Low Energy (BLE) for two different environments: large empty hall and narrow corridor. Measurements were done by 6 different smartphones of 3 different producers, which makes those measurements unique as accuracies achieved...
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Research of Emergency Modes of Wind Power Plants Using Computer Simulation
PublicationThe aim of this study is to investigate changes in the wind power plant energy production parameters under the conditions of sudden wind changes and voltage drop. To achieve these goals, a simulation of operation of wind power plants was performed. Twelve wind turbines with variable rotational speed equipped with a Fuhrländer FL 2500/104 asynchronous double-fed induction generator (DFIG) were used, each with an installed capacity...
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Sustainability reporting in the airline industry: Current literature and future research avenues
PublicationSustainability reporting (SR) allows organisations to communicate their non-financial impacts to stakeholders. It has also become a widespread business practice in aviation, a transport sector that contributes significantly to global warming. Academia has begun to examine SR in the context of airlines surprisingly late, and no comprehensive reviews of its respective developments have been made so far. Consequently, a systematic...
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Blood Pressure celebrates 20 years of dedication to Nordic hypertension research
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