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Gdańsk University of Technology

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Publications from the year 2021

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  • Shear fracture of longitudinally reinforced concrete beams under bending using Digital Image Correlation and FE simulations with concrete micro-structure based on X-ray micro-computed tomography images
    • Łukasz Skarżyński
    • Ireneusz Marzec
    2021 Full text CONSTRUCTION AND BUILDING MATERIALS

    The paper presents experimental and numerical investigations of the shear fracture in rectangular concrete beams longitudinally reinforced with steel or basalt bar under quasi-static three point bending. Shear fracture process zone formation and development on the surface of beams was investigated by Digital Image Correlation (DIC) whereas thorough analyses of 3D material micro-structure, air voids, width and curvature of shear cracking were carried out by X-ray micro-computed tomography (micro-CT). Moreover, the 2D shear fracture patterns in beams were numerically simulated with the finite element method (FEM) using isotropic coupled elasto-plastic-damage constitutive model for concrete enhanced by a characteristic length of micro-structure. Concrete meso-structure was modelled as a random heterogeneous four-phase material composed of aggregate particles, cement matrix, ITZ zones and air voids on the basis of X-ray micro-CT images. Experimental and numerical results revealed a satisfactory agreement regarding to the mechanism of failure, load-bearing capacity as well as cracking pattern.

  • Short-Term Price Reaction to Filing for Bankruptcy and Restructuring Proceedings—The Case of Poland
    • Błażej Prusak
    • Marcin Potrykus
    2021 Full text Risks

    This study aims to check market reaction to filing for bankruptcy and restructuring proceedings and to verify the short-term effect of a price reversal in the Polish market in the years 2004–2019. The research was conducted by dividing the analysed companies according to the procedure (bankruptcy and restructuring) and market (the main market and the NewConnect market). The research methodology used in the study is the event analysis method (AR, CAR, AAR and CAAR rates were used in the research), with a few statistical tests (T-test, Generalized rank Z Test, Gen-eralized rank T-Test, Patell or Standardized Residual Test, Kolari and Pynnönen adjusted Patell or Standardized Residual Test). It was found that share prices in the Polish share market react quickly to public information about filing an application for bankruptcy or restructuring. For all analysed companies, the mean rate of return on the event day was equal to −14%, and on the next day, it was −3%. Regardless of the type of share market and the form of proceedings, the reversal effect was not confirmed in the short term. It was found that cumulative above-average rates of return fall more strongly for companies listed on the less liquid Newconnect market (−23.6%), and when information on the filing for bankruptcy proceedings is provided (−28.5%), as opposed to the main market (−19.1%) and restructuring proceedings (−17%). The cumulative average rate of return for all analysed companies in the research period (−2, +10 days) was equal to −20.6%.

  • Siderofory bakteryjne – rola w patogenezie i potencjał wykorzystania w diagnostyce
    • Beata Krawczyk
    • Aleksandra Rosińska
    2021 Full text

    Do prawidłowego funkcjonowania i wzrostu organizmów żywych zarówno ludzi, jak i bakterii niezbędne jest żelazo. Mikroelement ten występuje na dwóch różnych stopniach utlenienia: jako jon żelazawy (Fe2+) rozpuszczalny w roztworach fizjolo-gicznych oraz jako jon żelazowy (Fe3+), który nie tworzy roztworów wodnych [1]. Dzięki swoim właściwościom oksydo-redukcyjnym, żelazo wpływa na poprawne funkcjonowanie bardzo licznej grupy enzymów, m.in. cytochromów, oksydoreduktaz NADH-CoQ10, oksydoreduktazy bursztynianu-CoQ10. Enzymy te biorą udział w ważnych dla życia procesach metabolicznych, w czasie których produkowane są cząsteczki ATP. Bez udziału żelaza niemożliwe jest oddychanie. Żelazo wchodzi w skład hemoglobiny – białka transportującego tlen z płuc do wszystkich komórek w ludzkim organizmie. Ponadto bierze udział w neurogenezie, różnicowaniu komórek mózgu oraz jest kofaktorem licznych enzymów uczestniczących w syntezie neuro-przekaźników. W sytuacji niedoboru żelaza odpowiedź układu odpornościowego jest bardzo osłabiona [1, 2]. W komórkach bakteryjnych rola tego pierwiastka jest równie istotna i opiera się na zdolności jonów żelaza do utleniania i redukcji. Enzymy redoks znajdują się w cytozolu lub związane są z błoną komórkową, a jednym z ważniejszych jest reduktaza rybo-nukleotydowa – kluczowy enzym w procesie syntezy DNA. Ponadto jon żelazowy często jest końcowym akceptorem elektronów w łańcuchu oddechowym bakterii beztlenowych [3]. Do prawidłowego funkcjonowania i wzrostu komórka bakteryjna wymaga 10-7 M wolnych jonów żelazowych. W organizmie żywiciela bakteria musi zmierzyć się z bardzo ograniczonym dostępem do tego kluczowego pierwiastka. Większość komórko-wego żelaza gospodarza jest związana z jego białkami, a stężenie wolnych jonów żelaza we krwi jest o wiele za niskie do swobodnej dyfuzji. Aby zaspokoić zapotrzebowanie na ten mikroelement, mikroorganizmy produkują siderofory, czyli różnorodne che-micznie cząsteczki chelatujące jony i rozpoczynają konkurencję z gospodarzem o do-stępną pulę żelaza [3].

  • Sieci neuronowe oparte na prawach fizyki
    • Marek Moszyński
    • Bartłomiej Borzyszkowski
    • Karol Damaszke
    • Jakub Romankiewicz
    • Marcin Świniarski
    2021

    Wiele fizycznie nieuzasadnionych sieci neuronowych, mimo zadowalają- cej wydajności, generuje sprzeczności z logiką i prowadzi do rozbieżno- ści wyników z rzeczywistością. Jedną z metod poprawy funkcjonowania typowego modelu typu “black-box” na etapie uczenia, jest rozszerzenie jego funkcji kosztu o zależność bezpośrednio inspirowaną wzorem fizycz- nym. Niniejszy rozdział wyjaśnia koncepcję budowy sieci neuronowych opartych na prawach fizyki, zawiera przegląd zaproponowanych rozwią- zań w tej dziedzinie oraz opisuje możliwości implementacji funkcji strat wykorzystujących wzory fizyczne. Ponadto przedstawione badania poka- zują, że przewidywania algorytmów inspirowanych przez fizykę mogą być nie tylko optymalne, ale również naukowo spójne z równaniami dziedzi- nowymi. Ostatecznie wykorzystanie wiedzy naukowej zawartej w dosto- sowanych funkcjach kosztów pokazuje, że metodyka ta gwarantuje wy- niki spójne z prawami fizyki, a także lepszą generalizację w porównaniu z klasycznymi sieciami neuronowymi.

  • Signal Propagation in Electromagnetic Media Modelled by the Two-Sided Fractional Derivative
    • Jacek Gulgowski
    • Dariusz Kwiatkowski
    • Tomasz Stefański
    2021 Full text Fractal and Fractional

    In this paper, wave propagation is considered in a medium described by a fractional-order model, which is formulated with the use of the two-sided fractional derivative of Ortigueira and Machado. Although the relation of the derivative to causality is clearly specified in its definition, there is no obvious relation between causality of the derivative and causality of the transfer function induced by this derivative. Hence, causality of the system is investigated; its output is an electromagnetic signal propagating in media described by the time-domain two-sided fractional derivative. It is demonstrated that, for the derivative order in the range [1,+∞), the transfer function describing attenuated signal propagation is not causal for any value of the asymmetry parameter of the derivative. On the other hand, it is shown that, for derivative orders in the range (0,1), the transfer function is causal if and only if the asymmetry parameter is equal to certain specific values corresponding to the left-sided Grünwald–Letnikov derivative. The results are illustrated by numerical simulations and analyses. Some comments on the Kramers–Krönig relations for logarithm of the transfer function are presented as well.

  • Significant Production of Thermal Energy in Partially Ionized Hyperbolic Tangent Material Based on Ternary Hybrid Nanomaterials
    • Umar Nazir
    • Muhammas Sohail
    • Muhammad Bilal Hafeez
    • Marek Krawczuk
    2021 Full text ENERGIES

    Nanoparticles are frequently used to enhance the thermal performance of numerous materials. This study has many practical applications for activities that have to minimize losses of energy due to several impacts. This study investigates the inclusion of ternary hybrid nanoparticles in a partially ionized hyperbolic tangent liquid passed over a stretched melting surface. The fluid motion equation is presented by considering the rotation effect. The thermal energy expression is derived by the contribution of Joule heat and viscous dissipation. Flow equations were modeled by using the concept of boundary layer theory, which occurs in the form of a coupled system of partial differential equations (PDEs). To reduce the complexity, the derived PDEs (partial differential equations) were transformed into a set of ordinary differential equations (ODEs) by engaging in similarity transformations. Afterwards, the converted ODEs were handled via a finite element procedure. The utilization and effectiveness of the methodology are demonstrated by listing the mesh-free survey and comparative analysis. Several important graphs were prepared to show the contribution of emerging parameters on fluid velocity and temperature profile. The findings show that the finite element method is a powerful tool for handling the complex coupled ordinary differential equation system, arising in fluid mechanics and other related dissipation applications in applied science. Furthermore, enhancements in the Forchheimer parameter and the Weissenberg number are necessary to control the fluid velocity

  • Similarities and differences in the production of renewable energy in Central and Eastern Europe countries
    • Agnieszka Wałachowska
    2021

    Research background: In the era of climate change, environmental degradation, but also growing pub-lic awareness, there is a need to look for new ecological energy sources. This condition can be met by renewable energy sources (RES). The EU seeks to have a 32% share of its gross final energy consumption from renewable sources by 2030. While the EU as a whole is on course to meet its tar-gets, the question is if production of renewable energy at a given level is not a chal-lenge for selected Central and Eastern Europe countries (CEECs) trsdi-tionslly dependent on fossil fuels. In order to take steps to develop RES in the studied countries, there is a need to analyze their diversity in terms of the potential. The results of such analyses should support the implementation of adopted strate-gies. Purpose of the article: The article divides the CEECs into similar groups by the structure and volume of energy production from RES. This production was com-pared with the value of Gross Domestic Product (GDP) of each studied country, the number of in-habitants and its area. Methods: Cluster analysis. The research based on the data provided by Euro-stat. Findings & Value added: The division of the studied region into subgroups de-pends on how the RES energy production is related to the GDP value, the number of inhabitants and the area of individual country. This reference allows to reflect the specificity of individual countries in more appropriate way than just an analysis of the absolute values of this production. The applied approach allows for a broad-er look at RES production for selected countries in the region. The obtained results can be used for the development of a common energy and climate policy to create and develop their own renewable energy markets.

  • Simple 60 GHz Switched Beam Antenna for 5G Millimeter-Wave Applications
    • Kamil Trzebiatowski
    • Mateusz Rzymowski
    • Łukasz Kulas
    • Krzysztof Nyka
    2021 Full text IEEE Antennas and Wireless Propagation Letters

    A 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 on a CuClad 217 substrate. Measurements were carried out in an anechoic chamber and experimental results show good agreement with numerical simulations. The antenna is capable of switching the main beam to the +45 $^\circ$ and −45 $^\circ$ directions in the horizontal plane with a gain of about 3 dBi and a beamwidth of 80 $^\circ$ in both states. The presented prototype shows several advantages over other state-of-the-art millimeter-wave reconfigurable antennas such as a simple electrical switching mechanism, low-cost manufacturing, a low profile, and a small footprint. These features make the presented antenna ideal for low-cost millimeter-wave 5G applications, particularly in end-devices working under the Internet-of-Things paradigm.

  • Simple SIR models with Markovian control
    • Krzysztof Bartoszek
    • Wojciech Bartoszek
    • Michał Krzemiński
    2021 Full text Japanese journal of statistics and data science

    We consider a random dynamical system, where the deterministic dynamics are driven by a finite-state space Markov chain. We provide a comprehensive introduction to the required mathematical apparatus and then turn to a special focus on the susceptible-infected-recovered epidemiological model with random steering. Through simulations we visualize the behaviour of the system and the effect of the high-frequency limit of the driving Markov chain. We formulate some questions and conjectures of a purely theoretical nature.

  • Simple sufficient condition for subspace to be completely or genuinely entangled
    • Maciej Demianowicz
    • Grzegorz Rajchel-Mieldzioć
    • Remigiusz Augusiak
    2021 Full text NEW JOURNAL OF PHYSICS

    We introduce a simple sufficient criterion, which allows one to tell whether a subspace of a bipartite or multipartite Hilbert space is entangled. The main ingredient of our criterion is a bound on the minimal entanglement of a subspace in terms of entanglement of vectors spanning that subspace expressed for geometrical measures of entanglement. The criterion is applicable to both completely and genuinely entangled subspaces. We explore its usefulness in several important scenarios. Further, an entanglement criterion for mixed states following directly from the condition is stated. As an auxiliary result we provide a formula for the generalized geometric measure of entanglement of the $d$--level Dicke states.

  • Simplified approach to assess the dynamic response of a container ship subjected to bow slamming load
    • Krzysztof Wołoszyk
    • Marian Bogdaniuk
    2021 Full text

    Simplified approach to assess the dynamic response of a container ship subjected to the bow slamming load, resulting in a transient vibratory response, typically called a 'whip-ping', is presented. The accurate numerical modelling is very complex and involves cou-pling of the hydrodynamic and structural solution at every time step, leading to huge com-putational and workload cost. Thus, the one-way coupling methodology is adopted, and hydrodynamic loads are derived using linear strip theory in the first step and applied to the FE beam model. Structural response is obtained in the time domain using an explicit dy-namic solver. Extreme bending moment is derived and compared with the normative val-ues of the wave-induced bending moment. Comparing to more accurate methods, the pre-sented approach seems to overestimate the bending moment and leads to a conservative design. Thus, it may be used in the early stages of the design, where fast and reliable methods are essential.

  • Simplified Method of Modelling Behaviour of Ship in Waves with Partially Flooded Compartments
    • Peter Szulczewski
    2021 Full text Transactions on Maritime Science-ToMS

    This paper contains a description of a numerical model for calculating behaviour of ships in waves. There are many models available, but the one described here can be characterised with a set of parameters that have a decisive impact on the final values of roll motion amplitude and frequency. In this paper, it is shown how a fitting of a standard-shape hull characterised by certain readily available parameters affects the final roll and frequency of the motion. In addition, calculations for a flooded tank were made, and a range of results for the maximum dynamic heeling forces from this tank is shown. This calculation can further be verified for a range of hull dimensions and geometries to present a viable method to the industry.

  • Simulation investigation of perovskite-based solar cells
    • Maciej Łuszczek
    • Grzegorz Łuszczek
    • Dariusz Świsulski
    2021 Full text Przegląd Elektrotechniczny

    Three models of thin-layer lead-halide perovskite solar cells with different electron-transport layers (TiO2,SnO2,ZnO) were investigatedby the simulation method. The perovskite layer thickness was optimized for all the systems. The analysis of the standard photovoltaic cell performanceparameters at various operating temperatures was performed. The best performance was achieved for the system with theSnO2conductive layer.

  • Simulation of the number of storm overflows considering changes in precipitation dynamics and the urbanisation of the catchment area: a probabilistic approach
    • Bartosz Szeląg
    • Roman Suligowski
    • Jakub Drewnowski
    • Francesco De Paola
    • Francisco-Jesus Fernandez-Morales
    • Łukasz Bąk
    2021 Full text JOURNAL OF HYDROLOGY

    This paper presents a probabilistic methodology that allows the study of the interactions between changes in rainfall dynamics and impervious areas in urban catchment on a long- and short-term basis. The proposed probabilistic model predict future storm overflows while taking into account the dynamics of changes in impervious areas and rainfall. In this model, a logistic regression method was used to simulate overflow resulting from precipitation events based on average rainfall intensity and impervious area. The adopted approach is universal (as it can be used in other urban catchments) and is a significant simplification of classic solutions; a hydrodynamic model is used to analyse the operation of the overflow. For the rainfall simulations, a rainfall generator based on the Monte Carlo method was used. In this method, a modification that allows the simulation of changes taking place in rainfall dynamics, including the effects of climate change, was introduced. This method provides the opportunity to expand and modify probabilistic models in which outflow from the catchment is modelled to predict the functioning of reservoirs and to design sewer networks that have the ability to deal with future rainfall dynamics, including moderate, strong, and violent downpours according to the Sumner scale. To verify the simulation results with a probabilistic model, an innovative concept using a hydrodynamic model was considered. This verification considers the changes in the impervious area in the period covered by the simulations and is limited using standard calculation procedures. In practice, the model presented in this work creates opportunities for defining the concept of sustainable development in urban catchments while taking into account the factors mentioned above. From the perspective of landscaping, this is important because it creates the opportunity to limit the impacts of climate change and area urbanization on the receiving waters.

  • Simulation Studies of Control Systems for Doubly Fed Induction Generator Supplied by the Current Source Converter
    • Paweł Kroplewski
    • Marcin Morawiec
    • Andrzej Jąderko
    • Charles Odeh
    2021 Full text ENERGIES

    The control system for a Doubly Fed Induction Generator (DFIG) supplied by a grid-connected Current Source Converter (CSC) is presented in this paper. Nonlinear transformation of DFIG model to the multi-scalar form is proposed. The nonlinear control strategy of active and reactive power of DFIG is realized by feedback linearization. In the proposed control scheme, the DFIG model and CSI parameters are included. Two Proportional-Integral (PI) controllers are dedicated for the control of the respective active and reactive powers. The control variables are the dc-link input voltage vector and the angular speed of the inverter output current. The proposed control approach is characterized by satisfactional dynamics and provides enhanced quality of the power transferred to the grid. In the simulation, evaluation of the characteristic operating states of the generator system, correctness of the feedback linearization and the dynamics of active and reactive power control loops are studied. Simulation results are adequately provided.

  • Simulator for Performance Evaluation of ASON/GMPLS Network
    • Sylwester Kaczmarek
    • Magdalena Młynarczuk
    2021 Full text IEEE Access

    The hierarchical control plane network architecture of Automatically Switched Optical Network with utilization of Generalized Multi-Protocol Label Switching protocols is compliant to next generation networks requirements and can supply connections with required quality of service, even with incomplete domain information. Considering connection control, connection management and network management, the controllers of this architecture could perform the same operations on the transport plane resources and could support control functions for Software Defined Networking controllers, which are considered as the future networking solutions. Therefore, it is very important to determine factors that have an influence on service control and resource management. One of the tools for achieving this goal is computer simulation. The paper proposes a simulator for the hierarchical control plane networks in an open source OMNeT++ environment, in order to evaluate network architecture performance for different network structures and traffic parameters. To demonstrate simulator capabilities, examples of typical simulations performance results for Polish and European network structures are presented and discussed. Performance metrics which have been used to evaluate the performance of this architecture are: mean values of Call Set-up Time, Connection Set-up Time, Call Release Time, Connection Release Time, loss probability for inter-domain connection requests and loss probability for low and high priority requests. General remarks concerned with presented simulator are also provided.

  • Simultaneous opto-electrochemical monitoring of carbamazepine and its electro-oxidation by-products in wastewater
    • Mattia Pierpaoli
    • Anna Dettlaff
    • Małgorzata Szopińska
    • Katarzyna Karpienko
    • Maciej Wróbel
    • Aneta Łuczkiewicz
    • Sylwia Fudala-Książek
    • Robert Bogdanowicz
    2021 Full text JOURNAL OF HAZARDOUS MATERIALS

    The growing human impact on aquatic environments, due to the extensive use of pharmaceuticals and the release of persistent pollutants, makes it necessary to implement new widespread methods for the characterisation and quantification of such contaminants and relative degradation products. Carbamazepine, 5H-dibenzo[b,f]azepine-5-carboxamide, (CBZ) is a widely used anti-epileptic drug, characterised by its limited removal by conventional wastewater treatments and high persistency in the environment. In this work, CBZ detection and quantification was performed in phosphate buffer as well as in samples of complex matrix like landfill leachates and treated wastewater originating from a medical facility, and simultaneously by optical and electrochemical methods using a novel transparent carbon-based nanostructured electrode. Coupling electrochemical (differential pulse voltammetry) with optical (UV-visible spectroscopy) methods, it has been possible to reach a limit of detection (LOD) for CBZ detection at the level of 4.7 μM for the electrochemical method, 10.3 μM for the spectroscopic method, and 3.6 μM for the opto-electrochemical method. Raman spectroscopy and ultra-high performance liquid chromatography coupled with tandem mass spectrometry techniques were employed to support and validate the combined technique. The novel developed technique showed high selectivity to carbamazepine and its by-products, even in environmental samples. Thus, this environmentally friendly, fast and accurate detection method is believed to be successfully implemented in the investigation of other pharmaceutical and chemical contaminates of concern.

  • Simultaneous Removal of Al, Cu and Zn Ions from Aqueous Solutions Using Ion and Precipitate Flotation Methods
    • Piotr Rybarczyk
    • Bożenna Kawalec-Pietrenko
    2021 Full text Processes

    This paper presents the results of investigations concerning the simultaneous removal of Al(III), Cu(II), and Zn(II) from dilute aqueous solutions using ion and precipitate flotation methods. The effects of initial solution pH, surface active substance concentration, and the gas velocity on the flotations’ efficiency and course are studied. Experimental results are discussed in terms of physicochemical aspects related to aqueous solutions of metal salts. The results indicate that satisfying simultaneous flotations of aluminum, copper and zinc species are observed if the pH value ranges between 7.0 and 9.0. It was found that an increase in collector concentration results in a decrease in the flotation rate constants. An increase in the gas velocity results in an increase in the ion and precipitate flotation rates.

  • Skuteczność klasyfikacji gatunków muzycznych za pomocą sieci neuronowej w zależności od typu danych wejściowych
    • Maciej Blaszke
    • Damian Koszewski
    • Bożena Kostek
    2021

    Rozpoznawanie gatunku muzycznego jest jednym z podstawowych elementów inteligentnych systemów tworzenia automatycznych list muzyki. Platformy strumieniowe oferujące taką usługę wymagają rozwiązań, które umożliwią jak najdokładniej określić przynależność utworu do gatunku muzycznego. Zgodnie z aktualnym stanem wiedzy – najskuteczniejszym klasyfikatorem są sztuczne sieci neuronowe (w tym w wersji uczenia głębokiego), dla których wejście może stanowić spektrogram (postać 2D wektora wejściowego), współczynniki MFCC czy wektor parametrów. We wcześniejszych pracach autorzy opisali opracowaną przez siebie sztuczną sieć neuronową, która z 5-procentowym błędem pozwoliła wyznaczyć zestaw deskryptorów standardu MPEG-7. Mogą one zostać wykorzystane między innymi jako dane wejściowe do klasyfikatora gatunku muzycznego. W rozdziale zaprezentowano porównanie skuteczności klasyfikatora wykorzystującego architekturę głęboką w zależności od typu danych wejściowych, takich jak: sygnał w postaci czasowej, spektrogram, MFCC, wektor parametrów oraz deskryptory niskopoziomowe standardu MPEG-7 zarówno występujące w bazie danych, jak i te obliczone z wykorzystaniem sieci neuronowej.

  • SMAKI ZIEMI ZABORSKIEJ. dziedzictwo przyrodnicze i kulturowe
    • Agnieszka Kurkowska
    2021

    Seminarium naukow „Smaki ziemi zaborskiej. Dziedzictwo przyrodnicze i kulturowe” współorganizowane było przez Wydział Architektury Politechniki Gdańskiej oraz Wielewski Dom Kultury im. Hieronima Derdowskiego/ Muzeum Ziemi Zaborskiej. Partnerami były Pomorski Zespół Parków Krajobrazowych, Centrum Edukacji i Informacji Ekologicznej w Gdańsku, Zaborski Park Krajobrazowy, Zaborskie Towarzystwo Naukowe, Muzeum Historyczno-Etnograficzne im. Juliusza Rydzkowskiego w Chojnicach, Lasy Państwowe: Nadleśnictwo Czersk, Nadleśnictwo Kościerzyna. Patronatu wydarzeniu udzielili Pomorska Okręgowa Izba Architektów RP oraz Oddział Wybrzeże Stowarzyszenia Architektów Polskich. Prelegenci odnieśli się do dziedzictwa wspólnoty, historii Zaborów, haftu zaborskiego, czasoprzestrzeni Anny Łajming w literackich zaborskich wędrówkach, wysmakowanego krajobrazu przyrodniczego i kulturowego wsi zaborskiej, zióła i związanych z nimi tradycji, obrazu domu zaborskiego w literaturze, smaku tajemniczych podań zaborskich, kaszubskiego domu tradycyjnego i współczesnego, zaborskiego lasu i smaków, które stamtąd pochodzą.