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Search results for: Archimedean copula
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The complexity of bicriteria tree-depth
PublicationThe tree-depth problem can be seen as finding an elimination tree of minimum height for a given input graph G. We introduce a bicriteria generalization in which additionally the width of the elimination tree needs to be bounded by some input integer b. We are interested in the case when G is the line graph of a tree, proving that the problem is NP-hard and obtaining a polynomial-time additive 2b-approximation algorithm. This particular...
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Carbonized Lanthanum-Based Metal-Organic Framework with Parallel Arranged Channels for Azo-Dye Adsorption
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Finding small-width connected path decompositions in polynomial time
PublicationA connected path decomposition of a simple graph $G$ is a path decomposition $(X_1,\ldots,X_l)$ such that the subgraph of $G$ induced by $X_1\cup\cdots\cup X_i$ is connected for each $i\in\{1,\ldots,l\}$. The connected pathwidth of $G$ is then the minimum width over all connected path decompositions of $G$. We prove that for each fixed $k$, the connected pathwidth of any input graph can be computed in polynomial-time. This answers...
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Michał Strankowski dr hab. inż.
PeopleJest zatrudniony w Katedrze Technologii Polimerów na Wydziale Chemicznym od 2006 roku. W tym samym roku uzyskał stopień doktora nauk technicznych w zakresie technologii chemicznej. Stopień doktora habilitowanego w dziedzinie nauk ścisłych i przyrodniczych uzyskał w 2019 roku. W okresie 2013-2015 pełnił funkcję kierownika projektu „PUR-GRAF” pt. „Nanokompozyty poliuretanowe zawierające zredukowany tlenek grafenu”. Za opracowane...
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Jacek Namieśnik prof. dr hab. inż.
PeopleScientific discipline: chemistryRector in 2016-2019 He was born on 10 December, 1949 in Mogilno. He graduated in 1972 at the Faculty of Chemistry at Gdańsk University of Technology, obtaining a master's degree in chemical engineering. In 1972 he started working at Gdańsk University of Technology, where in 1978 he defended his doctoral thesis and in 1985 he completed his habilitation. He was appointed an associate professor in 1991...
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Stanisław Ropela dr
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Stanisław Ropela dr
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Paweł Ropela
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Oliwia Gomuła
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Clearing directed subgraphs by mobile agents
PublicationWe study several problems of clearing subgraphs by mobile agents in digraphs. The agents can move only along directed walks of a digraph and, depending on the variant, their initial positions may be pre-specified. In general, for a given subset S of vertices of a digraph D and a positive integer k, the objective is to determine whether there is a subgraph H=(V,A) of D such that (a) S is a subset of V, (b) H is the union of k directed...
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Characteristics of Particles Emitted from Waste Fires—A Construction Materials Case Study
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Kacper Radziszewski mgr inż. arch.
PeopleIn 2016, he completed his master's studies at the Faculty of Architecture of the Gdańsk University of Technology. Architect. Co-organizer and leader of research workshops in the field of parametric architecture and modern fabrication methods, e.g. at the Faculty of Architecture at the Gdańsk University of Technology, at the Sopot University of Technology, at the Faculty of Architecture at the University of Technology in Bratislava,...
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Surface Properties and Photocatalytic Activity of KTaO3, CdS, MoS2 Semiconductors and Their Binary and Ternary Semiconductor Composites
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Contribution of landfill fires to air pollution – An assessment methodology
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AkademiaETI
e-Learning CoursesAkademia ETI to zajęcia z informatyki (a także z technologii pozostających w naukowo-dydaktycznych obszarach działalności Wydziału Elektroniki, Telekomunikacji i Informatyki Politechniki Gdańskiej) dla uczniów szkół średnich regionu prowadzone przez nauczycieli akademickich (ewentualnie przez doktorantów i studentów) Wydziału Elektroniki, Telekomunikacji i Informatyki Politechniki Gdańskiej.
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Modal analysis of cylindrical steel tanks
PublicationCylindrical steel tanks are very popular structures used for storage of products of chemical and petroleum industries. Their safety and reliability is crucial because any failure could have serious consequences. The aim of present paper is to show the results of the first phase of investigation of seismic behaviour such structures. Modal analysis using Finite Element Method (FEM) for three models of real tanks used in Poland has...
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Trait anxiety moderates the association between estradiol and dominance in women
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Robert Okuła mgr inż.
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The form of employment or business activity of the Gdańsk University of Technology graduates – years 2010-2018
Open Research DataThe dataset includes data from the survey on the Gdańsk University of Technology graduates from years 2010-2018 on their form of employment or business activity. The survey was conducted in the period from 2012 to 2020, two years after the respondents obtained graduate status. The research sample included 12776 respondents. To summarize, the most popular...
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Testing impedance analyzer with potentiostat using RC model with Si diode at 200 mV
Open Research DataThe dataset presents impedance spectrum non-linear RC model with diode presented in the figure below. This model was used as a test engine of the impedance analyzer with potentiostat described in the referenced paper. When changing the DC polarisation of the model the non-linear phenomena could be observed. Thanks to this, the model can be used as a...
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Testing impedance analyzer with potentiostat using RC model with Si diode at 0 V
Open Research DataThe dataset presents impedance spectrum non-linear RC model with diode presented in the figure below. This model was used as a test engine of the impedance analyzer with potentiostat described in the referenced paper. When changing the DC polarisation of the model the non-linear phenomena could be observed. Thanks to this, the model can be used as a...
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Testing impedance analyzer with potentiostat using RC model with Si diode at 600 mV
Open Research DataThe dataset presents impedance spectrum non-linear RC model with diode presented in the figure below. This model was used as a test engine of the impedance analyzer with potentiostat described in the referenced paper. When changing the DC polarisation of the model the non-linear phenomena could be observed. Thanks to this, the model can be used as a...
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Testing impedance analyzer with potentiostat using RC model with Si diode at 400 mV
Open Research DataThe dataset presents impedance spectrum non-linear RC model with diode presented in the figure below. This model was used as a test engine of the impedance analyzer with potentiostat described in the referenced paper. When changing the DC polarisation of the model the non-linear phenomena could be observed. Thanks to this, the model can be used as a...
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Current Practice of Global Bariatric Tourism—Survey-Based Study
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The critical factors of landfill fire impact on air quality
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Selected Metals in Urban Road Dust: Upper and Lower Silesia Case Study
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Quasi Real-Time XRF Spectrometer in Source Apportionment of PM10 in a Typical Suburban Area
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Optimized Protocol for RNA Isolation from Penicillium spp. and Aspergillus fumigatus Strains
PublicationEfficient RNA isolation from filamentous fungi is crucial for gene expression studies, but it poses significant technical challenges due to the robust cell walls and susceptibility of RNA to degradation by ribonucleases. This study presents the effectiveness of two RNA isolation protocols for four species of filamentous fungi: Penicillium crustosum, Penicillium rubens, Penicillium griseofulvum, and Aspergillus fumigatus. Both protocols...
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Chitosan-protein scaffolds loaded with lysostaphin as potential antistaphylococcal wound dressing materials.
PublicationAIMS: The development of technology for preparing chitosan-protein scaffolds loaded with lysostaphin, which potentially could be used as dressing for wound treatment and soft tissue infections caused by Staphylococcus aureus. METHODS AND RESULTS: The unique technology of chitosan solubilization using gaseous CO(2) instead of organic or inorganic acids was used for the incorporation of lysostaphin, the enzyme that exhibits bactericidal...
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More than just a beer—the potential applications of by-products from beer manufacturing in polymer technology
PublicationBeer is the most popular alcoholic beverage in the world, and its popularity is continuously growing. Currently, global beer production is estimated at around 2 billion hectoliters. Nevertheless, the increasing production capacity implicates the rising issue of generated by-products—brewers’ spent grain, spent hops, spent yeast, and wastewater. They are generated in massive amounts, so having in mind the current pro-ecological...
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Tomasz Wąsowicz dr hab.
PeopleTomasz Wąsowicz's research was first related to high-resolution atomic spectroscopy and focused on measurements and analysis of the transition probabilities of the forbidden lines, the hyperfine and isotopic structure of spectral lines of heavy elements, Stark effect in the helium atom. Tomasz Wąsowicz currently studies physicochemical processes occurring during interactions of various forms of radiation with atoms and molecules...
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The Snow Team Problem
PublicationWe study several problems of clearing subgraphs by mobile agents in digraphs. The agents can move only along directed walks of a digraph and, depending on the variant, their initial positions may be pre-specified. In general, for a given subset~$\cS$ of vertices of a digraph $D$ and a positive integer $k$, the objective is to determine whether there is a subgraph $H=(\cV_H,\cA_H)$ of $D$ such that (a) $\cS \subseteq \cV_H$, (b)...
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On the connected and weakly convex domination numbers
PublicationIn this paper we study relations between connected and weakly convex domination numbers. We show that in general the difference between these numbers can be arbitrarily large and we focus on the graphs for which a weakly convex domination number equals a connected domination number. We also study the influence of the edge removing on the weakly convex domination number, in particular we show that a weakly convex domination number...
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Recent Advancements in Cyclodextrin-Based Adsorbents for the Removal of Hazardous Pollutants from Waters
PublicationWater is an essential substance for the survival on Earth of all living organisms. However, population growth has disturbed the natural phenomenon of living, due to industrial growth to meet ever expanding demands, and, hence, an exponential increase in environmental pollution has been reported in the last few decades. Moreover, water pollution has drawn major attention for its adverse effects on human health and the ecosystem....
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Wyniki sulfammox (SRAO)
Open Research DataTwo granular sequencing batch reactors were operated for 160 days under anammox conditions, comparing the Anammox process and Sulfate Reduction Ammonium Oxidation process. The study aimed to investigate whether increasing the concentration of SO42- could enhance N removal rates under anaerobic conditions, and whether SO42- reduction and anammox processes...
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Marta Śliwa-Cebula
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Piotr Samól dr hab. inż. arch.
PeoplePiotr Samól is an associate professor (profesor uczelni) in the Department of History of Architecture and Conservation of Monuments at Gdansk University of Technology. He graduated in architecture (M.Sc. Eng.) and history (B.A.). His researches are focused on the architectural and urban history of Gdansk and Baltic Sea region. He defended his doctoral thesis (scientifc field: architecture and urban planning) on the architecture...
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Alina Guzik mgr
PeoplePhD candidate at Gdańsk University of Technology Doctoral School. EdTech, digital education and innovative didactics expert, senior product manager, product designer, certified e-learning designer. Conducts scientific research in educational technology, digital education, e-learning, modern teaching methods, innovation and new product development. An author of more than a dozen award-winning EdTech products implemented in international...
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Akademia ETI
e-Learning CoursesAkademia ETI to zajęcia z informatyki (a także z technologii pozostających w naukowo-dydaktycznych obszarach działalności Wydziału Elektroniki, Telekomunikacji i Informatyki Politechniki Gdańskiej) dla uczniów szkół średnich regionu prowadzone przez nauczycieli akademickich (ewentualnie przez doktorantów i studentów) Wydziału Elektroniki, Telekomunikacji i Informatyki Politechniki Gdańskiej.
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Effect of multiaxial bending-torsion loading on fracture surface parameters in high-strength steels processed by conventional and additive manufacturing
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Multiaxial fatigue behaviour of maraging steel produced by selective laser melting
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Exploring the Relationship between Particulate Matter Emission and the Construction Material of Road Surface: Case Study of Highways and Motorways in Poland
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Magnetic Susceptibility of Spider Webs and Dust: Preliminary Study in Wrocław, Poland
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The effect of UV-C irradiation on lipids and selected biologically active compounds in human milk
PublicationThe effect of UV-C irradiation of human milk on lipid oxidation, content of antioxidants (vitamin C and catalase, CAT) and bactericidal compounds (lysozyme), as well as the total antioxidant capacity (TAC), of the breast milk was investigated. In parallel, the extent of inactivation of some bacteria was also determined. UV-C at doses from 85 to 740 J L−1 caused total inactivation of Escherichia coli and Staphylococcus aureus, but...
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Management Strategy for Seaports Aspiring to Green Logistical Goals of IMO: Technology and Policy Solutions
PublicationRecently, because of serious global challenges including the consumption of energy and climate change, there has been an increase in interest in the environmental effect of port operations and expansion. More interestingly, a strategic tendency in seaport advancement has been to manage the seaport system using a model which balances environmental volatility and economic development demands. An energy efficient management system...
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Three-Dimensional Fractography for Conventional and Additive Manufactured Steels After Bending-Torsion Fatigue
PublicationIn this study, fracture surface topography parameters were measured to investigate the effects of multiaxial loading. In order to assess the metrological aspects of fracture for notched specimens made of high-strength steels processed by both conventional and additively manufacturing (AM) techniques, an optical surface profilometer was used. Three bending moment to torsion moment ratios (B/T) were studied, i.e. 2, 1 and 2/3. The...
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Multiaxial Fatigue Behaviour of SLM 18Ni300 Steel
PublicationFatigue behaviour of SLM 18Ni300 steel under proportional bending-torsion loading is studied. The fatigue tests are conducted under pulsating loading conditions using tubular specimens with a transversal circular hole. Three ratios of the normal stress to shear stress are considered, namely σ/τ=4,σ/τ=2 and σ/τ = 4/3. Crack initiation sites were found for two diametrically opposite points around the hole, whose locations are governed...
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Mechanika płynów, W/C, MiBM niest., sem. 04, letni 21/22 (M:31920W0)
e-Learning CoursesWYKŁAD Wprowadzenie i podstawowe definicje. Właściwości płynów. Modele płynów. Stan równowagi płynu. Wyznaczanie naporu hydrostatycznego. Prawo Archimedesa. Sposoby opisu ruchu płynu. Ruch ogólny płynu. Deformacja elemetu płynu. Ruch wirowy płynu. Zasady zachowania masy, pędu i energii. Bilans entropii. Równanie Naviera-Stokesa. Równanie Bernoulliego. ĆWICZENIA PRAKTYCZNE Kinematyka przepływów. Przepływy laminarne i turbulentne...
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Top 10 Iran Export Partners in 2011
Open Research DataLifting of Iranian sanctions could lead to a rapid improvement in the economic situation of Iran. This will not only remove the barriers of international transactions, but also enable the investments of foreign entities on the territory of Iran, increasing the competitiveness of operators, including in the key mining sector.
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Analytical and legislative challenges of sewage sludge processing and management
PublicationThis article presents the most popular methods of sewage sludge management and analytical techniques which could be a powerful tool in designing new sewage sludge management methods. Chemical analysis is also described as a vital point at the subsequent stages of technological processes control and sewage sludge quality assessment. It is also an instrument essential to maintaining control of processed sewage sludge introduced to...