2018 - Repozytorium publikacji - Politechnika Gdańska

Pokaż publikacje z roku

Publikacje z roku 2018

Pokaż wszystkie

Krótka historia Sympozjum Historii Elektryki
- Dariusz Świsulski
2018 Pełny tekst Śląskie Wiadomości Elektryczne
Przedstawiono historię dotychczasowych edycji Sympozjum Historia Elektryki. Pierwsze Sympozjum zostało zorganizowane w Gdańsku z inicjatywy Centralnej Komisji Historycznej Stowarzyszenia Elektryków Polskich. Było okazją do spotkania osób interesujących się historią z wyższych uczelni technicznych i przemysłu, ale również zajmujących się historią zawodowo. Sukces pierwszego spotkania spowodował, że stała się to cykliczna impreza, organizowana przez rożne ośrodki: Szczecin (2016), Wrocław (2017), Kraków (2018). Przedstawiono również krótkie omówienie tematyki referatów prezentowanych w ramach dotychczasowych konferencji.
Kryteria doboru przewodu uziemiającego ograniczników przepięć w stacjach elektroenergetycznych WN
- Stanisław Czapp
- Krzysztof Kujawski
2018 INPE: Informacje o Normach i Przepisach Elektrycznych
W artykule przedstawiono najważniejsze kryteria doboru przewodu uziemiającego ograniczników przepięć w stacjach elektroenergetycznych o napięciu 110 kV i wyższym. Rozważono narażenia cieplne przewodu uziemiającego i ich wpływ na dobór jego przekroju. Omówiono zasady izolowania tego przewodu, aby zapewnić poprawną rejestrację liczby zadziałań ogranicznika.
Kształcenie kompetencji społecznych inżynierów z wykorzystaniem e-technologii
- Agnieszka Kaczmarek-Kacprzak
2018 Pełny tekst Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej
Kompetencje społeczne to jedne z najbardziej poszukiwanych umiejętności w połączeniu z wiedzą techniczną pośród pracodawców. Na uczelniach technicznych przedmioty humanistyczne częściej traktowane są marginalnie, niż jako szansa na współpracę ze studentami na zupełnie innej płaszczyźnie. Artykuł prezentuje doświadczenia autorki w kreowaniu kompetencji społecznych pośród inżynierów studiujących na II stopniu studiów stacjonarnych. W trakcie realizacji przedmiotu zostały wykorzystane e-technologie i interaktywne formy kształcenia, których celem była realizacja projektu społecznego i rozwój umiejętności miękkich.
KSZTAŁTOWANIE ZABUDOWY I SYSTEMÓW ZIELENI NA TERENACH MIEJSKICH
- Magdalena Grochulska-salak
- Katarzyna Zielonko-Jung
- Kinga Zinowiec-Cieplik
2018 Pełny tekst PRACE NAUKOWE UNIWERSYTETU EKONOMICZNEGO WE WROCŁAWIU
Dynamika wzrostu miast i problemy jakości ich środowiska skłaniają do badań nad możliwościami tworzenia efektywnych użytkowo systemów zieleni zintegrowanej z zabudową. Rozwijane są rozwiązania integrujące roślinność z rozwiązaniami architektonicznymi (tzw. zielona infrastruktura). Przejawem nowego podejścia do funkcji zieleni w mieście są farmy miejskie pozwalające na produkcję roślin na potrzeby społeczności lokalnej. Podjęte zostały interdyscyplinarne badania w celu rozpoznania problematyki kształtowania nowoczesnej struktury i parametrów zabudowy oraz zielonej infrastruktury jako systemu współzależnych elementów środowiska miejskiego. Prezentowane są wyniki w odniesieniu do współczesnego planowania przestrzennego. Publikacja stanowi głos w dyskusji dotyczącej planowania przestrzennego, wskazując na uwarunkowania i sposób kształtowania zabudowy zintegrowanej z formami zieleni dla zachowania środowiskowej równowagi przestrzeni miejskich.
Ku zeroemisyjnej energetyce gazowej
- Paweł Ziółkowski
2018 Rynek Energii
W pracy krótko omówiono trendy wprowadzane w obiegach gazowych z zastosowaniem oksyspalania. Następnie przed-stawiono rozwiązanie nowego układu opartego na wykorzystaniu dwóch urządzeń o wzmożonej konwersji energii, a mia-nowicie „mokrej komory spalania” i „skraplacza natryskowo-strumieniowego”. Zaproponowany obieg gazowo-parowy realizowany jest w jednej turbinie, która ma zalety zarówno turbiny gazowej (wysokie temperatury wlotowe) jak i turbiny parowej (pełna ekspansja do próżni). W oparciu o analizy termodynamiczne (przeprowadzane kodami CFM) określono sprawność układu z zastosowaniem oksyspalania i wychwytem dwutlenku węgla. Motywacją do podjęcia niniejszej pracy jest potrzeba dywersyfikacji źródeł energii oraz poszukiwanie nowych rozwiązań elektrowni również kompaktowych. Aby uzyskać kompaktowość obiektu, należy pozbyć się największych gabarytowo aparatów obiegu, którymi są: parowy kocioł odzyskowy oraz konwencjonalny kondensator pary. Wymaga to opracowania nowych, nietypowych urządzeń, ale w za-mian otrzymuje się na tyle istotne zmniejszenie gabarytów, że takie elektrownie mogą być przyszłością miast, gdzie łatwo można byłoby je dopasować do potrzeb użytkowników, w tym również do produkcji ciepła.
La 15 Nb x Ge 9 : a superstructure of the Mn 5 Si 3 structure type with interstitial Nb atoms
- Joanna Bławat
- Marta Roman
- Weiwei Xie
- Robert J. Cava
- Tomasz Klimczuk
2018 JOURNAL OF SOLID STATE CHEMISTRY
The crystal structure and elementary properties of La15NbxGe9 are reported. Single-crystal X-ray diffraction,from a crystallite with only 0.12 Nb/formula unit, reveals that this compound, although transition metal deficient, crystallizes in a hexagonal “15-1-9”-like structure type, space group P63mc (no. 186) with lattice parameters a = b = 15.5017(2) Å, c = 6.9173(2) Å. The physical properties were examined by specific heat and resistivity measurements. La15Nb0.4Ge9 shows metallic behavior, and no superconductivity is observed above 0.4 K. The Sommerfeld coefficient (γ = 62.41(8) mJ mol−1 K−2) and the Debye temperature (θD = 267(1) K) were estimated from a fit to the low temperature heat capacity data. La15Nb0.4Ge9 is the first reported compound in the ternary La-Nb-Ge system.
Laboratory research on the influence of swelling clay on the quality of borehole cementing and evaluation of clay-cutting wellbore tool prototype
- Mateusz Kmieć
- Bartłomiej Karpiński
- Michał Antoszkiewicz
- Marek Szkodo
2018 Pełny tekst APPLIED CLAY SCIENCE
Swelling clay phenomenon is frequently observed during oil and gas drilling operations and has a significant impact on the quality of cementing procedure. Certain types of clayey minerals increase their volume in contact with water-based drilling fluids. After drilling is completed, borehole remains unsupported and filled with waterbased drilling fluids for several hours, before a casing string is inserted and secured with cement. In the period of time between completing the drilling and inserting the casing string the clay can expand hindering proper cementing or blocking the casing string in a wellbore. Filling the annular space between a casing pipe and wellbore walls with cement is crucial for further exploitation of a well. An improper performance of displacement work (primary cementing) may cause both financial losses and environmental damage. The aim of this study is to describe the impact of distorted annular space geometry on cement sheath quality and to examine the possibility of improving the distorted geometry with a prototype wellbore tool. The tool was designed to be mounted as a first pipe section on the casing string (cementing shoe/reamer shoe). Two test stands were designed and constructed. The first one simulates the well cementing process, while the second one simulates the downward movement of the casing pipe in the well (run in hole process) drilled in expansive clay. Six distorted annular space sections were cemented using the first test stand. The sections were scanned with μXCT (computed micro-tomography) to locate discontinuities in the cement sheath. This research has confirmed an adverse influence of annular space obstructions on the cement sheath quality, thus the necessity of removing them before cementing. The obstructions can be removed by means of newly designed clay cutting wellbore tool. Therefore, the prototype of such a tool was tested on the second test stand. The experiment allowed to evaluate an influence of a swollen clay obstruction on the force needed to push the prototype tool through the obstruction. The same experiment was conducted with a standard cementing shoe in order to obtain comparative data. Hole geometry improvement, ability to fragment and remove clay cuttings have been observed. The research has confirmed that the prototype tool efficiently improves the borehole geometry and, consequently, improves the cement sheath quality.
Laboratory test rig for examining aggregate mining from seabed using the AIRLIFT method
- Czesław Dymarski
- Tomasz Pająk
2018 Pełny tekst Polish Maritime Research
The use of the Airlift method for transporting the mined aggregate from the seabed to the deck of the mining ship is an alternative for presently used solutions, such as suction pumps or scoop transport for instance. Building the laboratory test rig was preceded by tests in natural conditions. The rig was designed in such a way as to model these conditions as close as possible, and to have potential for further development
Lamb wave propagation in a single lap adhesive joint
- Magdalena Rucka
- Jacek Lachowicz
- Erwin Wojtczak
2018
The aim of the paper is the analysis of Lamb wave propagation in adhesive joints. The research was performed on a single lap adhesive joint of two steel plates. Two types of joints, namely an intact and with defect were considered. In experimental investigations the condition assessment of the joint was performed with the use of antisymmetric Lamb waves excited by a plate piezo actuators and measured by a laser vibrometer. Numeri-cal analysis was carried out using the finite element method in Abaqus/Explicit environment. The results of experimental and numerical investigations indicated the changes in signals collected after passing through the joints with different areas of bonding.
Lamb wave-based monitoring of shear failure of an adhesive lap joint
- Magdalena Rucka
- Erwin Wojtczak
- Jacek Lachowicz
2018 Pełny tekst Diagnostyka
The paper presents a study on the elastic wave propagation in adhesive joints of steel plates subjected to tensile loading. A single lap joint was chosen for analysis because of its simplicity and plurality of applications. Experimental investigations consisted of the uniaxial extension of prepared specimens. Force and displacement values were recorded by a testing machine. Simultaneously, guided Lamb waves were excited and signals of their propagation were collected in a number of points by piezoelectric transducers attached to the specimen surface. Further processing of signals allowed to determine some disturbances in gathered data. The continuous wavelet transform revealed discontinuities in force-displacement relations. The Fourier transform showed changes in frequency values of recorded signals. Large disturbances of the root mean square values was also observed. The results of all analyses allowed to conclude that the identification of partial degradation state before the sample destruction was possible.
Land of New Towns
- Izabela Mironowicz
2018 disP
Reflexions on new towns throught the history.
Landscape as the tool of coherence in the land management of rural communes
- Anna Górka
2018 Pełny tekst Annals of Warsaw University of Life Sciences - SGGW Horticulture and Landscape Architecture
Economic and social transformation of rural areas in Poland after 1990 reveals itself through disintegration of previous spatial order. Building a new pattern requires a vision, which would counteract complex causes of disintegration. The latter belong to institutional domain of planning strategies and the area of common practices. Therefore, agreement on aims and means between spatial policy strategies and tactics of space users would favour the protection and sustainable shaping of environmental resources. The attempt which will merge both aforementioned life domains may be successfully realized only within landscape and at the level of commune, where local development takes place. The article refers to symptoms and causes of deformations in rural landscapes. It describes landscape rurality as desired development vision and utility of landscape tools in space management of a small commune. The article defines the idea of public space in a landscape aspect and indicates directions and areas of explorations, which would need to be developed according to the suggested perspective.
Language of Benefits as a Novel Tool for Improving Website Personalization
- Katarzyna Ossowska
- Anna Czaja
- Marcin Sikorski
2018 Lecture Notes in Business Information Processing
A properly designed website allows the user to search for information faster, and more accurately. The information content of the website should be also adapted to the needs of the user. The purpose of this article is to present a novel Language of Benefits (LoB) approach to facilitate the use of websites for individual user groups. The LoB approach is an approach addressed to IT Analysts, to facilitate the process of web design, so that designed websites can better satisfy the many expected benefits of users themselves.
Large deformation modelling of CPT probing in soft soil—pore water pressure analysis
- Jakub Konkol
- Lech Bałachowski
2018 Pełny tekst
This paper presents the results of finite element modelling with Updated Lagrangian formulation of the Cone Penetration Test in soft soil deposit located in Jazowa, Poland. The numerical calculations are carried out for homogenous, normally consolidated, organic soil layer. The Modified Cam Clay constitutive model for soft soil and Coulomb model for interface are used. The study compares the registered pore water pressure distributions for type-2 piezocone observed during in-situ penetration and corresponding numerical model. The numerical dissipation test is carried out and the results are confronted with in-situ registered data. The influence of orthotropic soil hydraulic conductivity on pore water pressure development at shoulder filter element during dissipation tests is examined. Finally, the distribution of pore water pressures around the piezocone obtained from numerical simulations is compared with high quality literature database.
Laser granulometer as an useful tool for selection of appropriate membranes used in the MIEX®DOC-UF/MF hybrid process
- Mariola Rajca
- Rafał Bray
- Karolina Fitobór
- Klaudiusz Gołombek
2018 Pełny tekst ARCHIVES OF METALLURGY AND MATERIALS
In the study, particle size distribution of the MIEX® resin was presented. Such analyses enable to determinate whether presence of fine resin fraction may be the reason for unfavorable membrane blocking during water purification by the hybrid MIEX®DOC-microfiltration/ultrafiltration systems. Granulometric analysis of resin grains using the laser diffraction particle size analyzer (laser granulometer) was carried out as well as the microscopic analysis with scanning electron microscope. The following samples were analyzed: samples of fresh resin (a fresh resin – not used in water treatment processes) and samples of repeatedly used/regenerated resin that were collected to analysis during mixing and after sedimentation process. Particle size distribution was slightly different for fresh resin and for repeatedly used/regenerated resin. The grains sizes of fresh resin reached approximately 60 μm (d10), 120 μm (d50) and 220 μm (d90). Whereas the sizes of repeatedly used/regenerated resin were about 15 μm (d10), 40 μm (d50) and 115-130 μm (d90). The smallest resin grains sizes were in the range of 0.3-0.45 μm. This ensures that the ultrafiltration membranes retain all resin grains, even the smallest ones. Whereas the microfiltration membranes must be appropriately selected to guarantee full separation of the resin grains and at the same time to exclude a membrane pores blocking.
Launching of steel bridge girder. Application of nonlinear shell models
- Krzysztof Żółtowski
- Mikołaj Binczyk
2018
The paper describes the final technology of launching the steel bridge superstructure. The original technology failed in the first construction stage. Local damage of steel webs caused by plastic buckling stopped the procedure. In the effect of damage a new consulting team was employed to solve the problem and redesign a technology of constructing. The key element of the new solution was developed with great help of non-linear shell FEM model of a span. The paper presents construction methods, applied theoretical analysis and a number of conclusions resulting from the collected experience.
LCT, PIV and IR Imaging Detection in Selected Technical and Biomedical Applications
- Jan Stąsiek
- Marcin Jewartowski
2018 Pełny tekst
Thermochromic liquid crystals (TLC), Particle Image Velocimetry (PIV) and Infrared Imaging Themography (IR) have been successfully used in non-intrusive technical, industrial and biomedical studies and applications. These four tools (based on the desktop computers) have come together during the past two decades to produce a powerful advanced experimental technique as a judgment of quality of information that cannot be obtained from any other imaging procedure. The brief summary of the history of this technique is reviewed, principal methods and tools are described and some examples are presented. With this objective, a new experimental technique have been developed and applied to the study of heat and mass transfer and for biomedical diagnosis. Automated evaluation allows determining the heat and flow visualisation and locate the area of suspicious tissue of human body.
LDFEM analysis of FDP auger installation in cohesive soil
- Jakub Konkol
- Lech Bałachowski
- Jan Linowiecki
2018
This paper deals with large deformation finite element (LDFE) preliminary modelling of Full Displacement Pile (FDP) installation in cohesive soil deposit located in Jazowa, Poland. The detailed FDP auger geometry is applied and the drilling process is modelled with full 3D Coupled Eulerian-Lagrangian (CEL) formulation. The total stress approach and elastic-perfectly plastic model with rate-dependent Mises plasticity is used. The interaction between auger and surrounding soil is controlled by adhesive contact algorithm. The radial total stress distributions along FDP auger in selected distances from the pile axis are investigated. The reaction force and rotational moment which act on the auger are determined and the results of numerical analysis are compared with data registered by drilling rig. The aim of this paper is to clarify the installation effects which take place during FDP pile installation in soft cohesive soil.
Le trasformazioni economiche globali
- Luciano Segreto
2018
The chapter highlights the main economic trasformations of the world economy after the end of Cold War until 2018
Lead(II) coordination polymers with imidazole-4- and pyrazole-3-carboxylate isomeric linkers: Structural diversity and luminescence properties
- Mateusz Kowalik
- Joanna Masternak
- Katarzyna Kazimierczuk
- Oleksiy Khavryuchenko
- Bogumiła Kupcewicz
- Barbara Barszcz
2018 JOURNAL OF SOLID STATE CHEMISTRY
Using 1H-imidazole-4-carboxylic acid (4imCOOH) and 1H-pyrazole-3-carboxylic acid (3pyrCOOH) coordination polymers [Pb(4imCOO)2(H2O)]n (1) and [Pb2(3pyrCOO)4]n (2) were constructed. Obtained polymers were characterized via FT-IR, X-ray, PL and TG methods. The coordination polyhedron around Pb(II) in 1 is described as distorted pentagonal pyramid with hemidirected coordination sphere (based on DFT calculations). Compound 2 consists of two crystallographically independent Pb(II) centres: Pb1 forms distorted monocapped pentagonal pyramid polyhedron (CN = 7, hemidirected), whereas the coordination polyhedron of Pb2 is distorted monocapped pentagonal pyramid (CN = 7) or tricapped octahedron (CN = 9, including secondary bonds) with holodirected geometry (confirmed by DFT calculations). Crystal structure of polymer 1 demonstrates a 1D structural motif with 2C1 topology while polymer 2 is a 2D compound with cpf topology. Polymer 1 presents blue-green emission at 485 nm at RT in the solid state, whereas polymer 2 exhibits two emission centres with maximum at 449 nm (blue fluorescence) and at 532 nm (green-yellow fluorescence), respectively.