2022 - Publications Repository - Gdańsk University of Technology

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Displacement Sensors Based on the Phase of the Reflection Coefficient of a Split Ring Resonator Loaded Transmission Line
- Zahra Shaterian
- Michał Mrozowski
2022 IEEE SENSORS JOURNAL
— In this paper, novel displacement sensors using a microstrip loaded with a pair of split ring resonators (SRRs) are proposed. It is shown that the phase of the reflection coefficient from the loading SRRs can be used for displacement sensing. The paper also proposes a differential version of the sensor that benefits from a higher sensitivity and reference zero, which is useful for alignment purposes. It is further shown that the concept of interferometry can be used to convert the output variable of the sensor from changes in the phase to variation in the amplitude of the reflected wave, which can be easily measured. To this end, the proposed single-ended or differential sensors are used along with a branch-line coupler. The proposed sensing mechanism is validated through EM simulation of the structures. The concept is further validated through the fabrication and measurement of a prototype
Divulging the anti-acetylcholinesterase activity of Colletotrichum lentis strain KU1 extract as sustainable AChE active site inhibitors
- Anoop Kallingal
- Aravind Ayyolath
- Varun Thachan Kundil
- Akshay M S
- Tomy Muringayil
- Józef Haponiuk
- Sabu Thomas
- Anu Augustine
2022 Full text ARCHIVES OF MICROBIOLOGY
Alzheimer’s disease (AD), also called senile dementia is a neurodegenerative disease seen commonly in the elderly and is characterised by the formation of β-amyloid plaques and neurofbrillary tangles (NFT). Though a complete understanding of the disease is lacking, recent studies showed the role of the enzyme acetylcholinesterase (AChE) in pathogenesis. Finding new lead compounds from natural sources has always been a quest for researchers. Endophytic fungi are a set of microbes that reside within plants without causing any harm. This study focuses on screening endophytes for the production of active acetylcholinesterase inhibitors. Five endophytic fungi were isolated from Catharanthus roseus and screened for AChE inhibitory activity. Three isolates were found to inhibit AChE inhibitory activity and were distinguished based on molecular and microscopic methods. The mycelial extract was taken for the bioassay-guided column chromatography and TLC was performed on the active fraction. The GC–MS and NMR analysis identifed the active compounds in the extract as 9-hexadecen-1-ol and erucamide. Molecular docking studies revealed that the compounds are thermodynamically feasible and have signifcant glide scores. Computational studies revealed that the hydroxyl group of 9-hexadecen-1-ol forms a hydrogen bond with Ser 293 in the active site of AChE, whereas the active site interactions were predominantly hydrophobic in the case of erucamide and are refected in AChE inhibition assays.
DMSO and TMAO—Differences in Interactions in Aqueous Solutions of the K-Peptide
- Julia Godlewska
- Bartosz Cieśla
- Jarosław Wawer
- Piotr Bruździak
2022 Full text INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
Interactions between a solvent and their co-solute molecules in solutions of peptides are crucial for their stability and structure. The K-peptide is a synthetic fragment of a larger hen egg white lysozyme protein that is believed to be able to aggregate into amyloid structures. In this study, a complex experimental and theoretical approach is applied to study systems comprising the peptide, water, and two co-solutes: trimethylamide N-oxide (TMAO) or dimethyl sulfoxide (DMSO). Information about their interactions in solutions and on the stability of the K-peptide was obtained by FTIR spectroscopy and differential scanning microcalorimetry. The IR spectra of various osmolyte–water–model-peptide complexes were simulated with the DFT method (B3LYP/6-311++G(d,p)). The FTIR results indicate that both solutes are neutral for the K-peptide in solution. Both co-solutes affect the peptide to different degrees, as seen in the shape of its amide I band, and have different influences on its thermal stability. DFT calculations helped simplify the experimental data for easier interpretation.
DNAffinity: a machine-learning approach to predict DNA binding affinities of transcription factors
- Sandro Barissi
- Alba Sala
- Miłosz Wieczór
- Federica Battistini
- Modesto Orozco
2022 Full text NUCLEIC ACIDS RESEARCH
We present a physics-based machine learning approach to predict in vitro transcription factor binding affinities from structural and mechanical DNA properties directly derived from atomistic molecular dynamics simulations. The method is able to predict affinities obtained with techniques as different as uPBM, gcPBM and HT-SELEX with an excellent performance, much better than existing algorithms. Due to its nature, the method can be extended to epigenetic variants, mismatches, mutations, or any non-coding nucleobases. When complemented with chromatin structure information, our in vitro trained method provides also good estimates of in vivo binding sites in yeast.
Do Leonardo da Vinci’s drawings, room acoustics and radio astronomy have anything in common?
- Andrzej Kulowski
2022 Full text Heritage Science
After introducing Leonardo da Vinci’s (LdV) predecessors in the field of light propagation research, his drawings on the topic of reflecting light by a spherical mirror are analysed. The discovery of LdV is presented, according to which, at an infinitely distant source of rays, a small fragment of the canopy is enough to generate a focus, while the rest of the mirror forms a caustic for which LdV did not indicate an application. An analytical description of the energy concentration in the focus and on the caustic is given, together with its reference to the geometric representation of the acoustic field in rooms. Based on the general principles of wave motion, symmetry is shown in the description of energy relations in acoustics and electromagnetism. It is explained why in the sound field in existing halls, instead of a whole caustic only its cusp is observed, which is perceived as a point-like sound focus. The size of the mirror aperture, shown graphically by LdV, is determined. How the development of receiving techniques increased the mirror aperture compared to the LdV estimate is also shown. The implementation of these improvements is presented via the example of the Arecibo and FAST radio telescopes.
Do We Need a Lighting Detox for Sustainable Cities in the 21st Century?
- Karolina Zielińska-Dąbkowska
2022 Full text ARC Lighting In Architecture
This article looks at relearning our connection to light and dark in context of sustainability, climate change and urban lighting.
Dobre praktyki Spółdzielni Otwartej Edukacji : Jak uczyć kompetencji cyfrowych w bibliotece
- Andrzej Dominiowski
- Paulina Gawrych
- Agnieszka Kaczmarek
- Agnieszka Kajdaniak
- Kamila Kokot-Kanikuła
- Anna Małczuk-Wakulińska
- Anna Michniuk
- Iwona Sójkowska
- Jolanta Tokarek
- Małgorzata Trąmpczyńska
2022 Full text
Rozwój Spółdzielni Otwartej Edukacji jest możliwy dzięki wspólnej pracy i wiedzy kilkudziesięciu zaangażowanych w nią osób. To samo dotyczy tworzonej przez ostatni rok publikacji podsumowującej dobre praktyki nauczania kompetencji cyfrowych w bibliotece. Do współpracy zostały zaproszone bibliotekarki, które już od pewnego czasu uczestniczyły w projekcie, a teksty merytoryczne powstały między innymi na podstawie materiałów wypracowanych przez trenerki/trenerów i w czasie kursów internetowych.
Document centric knowledge processes
- Magdalena Godlewska
2022
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Does being socially good save firms from bankruptcy? A systematic literature review and bibliometric analysis
- Muhammad Mushafiq
- Błażej Prusak
2022 Full text Ekonomia i Środowisko
The purpose of the review was to find out, does being responsible saves firms from bank-ruptcy? What is the relationship between corporate social responsibility and default risk? What meth-ods and measures are used in the literature to evaluate this relationship? And what is the theoretical underpinning of the studies? Moreover, to explore what are the gaps for future work, Web of Science and Scopus databases were utilised to obtain the relevant articles for review. A total of 24 articles were reviewed using PRISMA systematic literature review and bibliometrics. This review finds that the liter-ature has an unidirectional inverse relationship between corporate social responsibility and default risk. Moreover, most literature utilises the stakeholder perspective as the theoretical framework. A research gap exists in explaining the relationship between different theories and extending the model with various aspects of macro- and micro-economics as well as finance. This article contributes to the theoretical aspect by classifying methods, proxies, and theoretical underpinnings used in the research for corporate social responsibility and default risk.
Don't forget the dark side of green transformation
- Małgorzata Zięba
- Susanne Durst
- Martyna Gonsiorowska
2022 Full text
Design/methodology/approach – The study is a continuation of the research by Durst and Zieba (2019) related to knowledge risks and their potential outcomes. This present study makes an update on the literature on knowledge risks and green transformation and describes knowledge risks that can be faced in this process. Originality/value – The paper offers new insights for researchers dealing with the topic of knowledge risks in the context of green transformation and ways of handling them. Practical implications – The study provides useful information for managers and owners of companies who are not always aware of the dark side of knowledge and risks related to it. Additionally, companies are more and more often challenged with the need to make the green transformation and this process can also be a tricky one. Limitations – At this stage of development, the proposed study is of theoretical character. This limitation will be overcome in future research activities that involve a large sample of organizations from various countries and sectors.
Dopływ wód podziemnych do Zatoki Puckiej
- Maciej Matciak
- Małgorzata Pruszkowska-Caceres
- Beata Szymczycha
- Justyna Kobos
- Żaneta Kłostowska
- Marta Misiewicz
- Paweł Owsianny
2022
W rozdziale opisano zjawisko SGD czyli dopływu wód podziemnych do akwenu morskiego Zatoki Puckiej. Scharakteryzowano warunki wystepowania i krążenia wód podziemnych, ich skład chemiczny, wielkość i miejsca dopływu oraz obecność i charakter wód wypełniajacych osady denne.
Doświadczalno-numeryczna analiza wpływu średnicy pręta na przyczepność w teście pull-out
- Marcin Burdziński
- Maciej Niedostatkiewicz
2022
W pracy zaprezentowano podstawowe informacje oraz wyniki doświadczalno-numerycznej analizy wpływu średnicy pręta na zachowanie przyczepność w badaniu bezpośredniego wyciąganie pręta z betonowego bloku zwanego testem pull-out (POT).
Double ZIF-L structures with exceptional CO2 capacity
- Iwona Cichowska-Kopczyńska
- Joanna Mioduska
- Jakub Karczewski
2022 Full text CHEMICAL ENGINEERING RESEARCH & DESIGN
Carbon dioxide emission is an emerging problem nowadays and new methods are designed for its control. In this article, a report on the formation of zeolitic imidazole framework with an apparent double leaf-like morphology DZIF-L is given. The special structure of the materials prevents from aggregation of the particles providing remarkable CO2 capacity. At 0.1 MPa the CO2 uptake was 2.99 ± 0.06 mmol/g. The capacity of synthesized material is higher than that of any other structure that was so far identified between single ZIF-L and ZIF-8. Fourier transform infrared (FT-IR), X-ray diffraction (XRD), scanning electron microscopy (SEM) and Brunauer-Emmett-Teller surface area analysis were used to characterize the material.
Double-diffusive natural convection energy transfer in magnetically influenced Casson fluid flow in trapezoidal enclosure with fillets
- Hasan Shahzad
- Qurrat Ul Ain
- Amjad Ali Pasha
- Kashif Irshad
- Imtiaz Ali Shah
- Abuzar Ghaffari
- Muhammad Bilal Hafeez
- Marek Krawczuk
2022 Full text INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
The prime motive of this disquisition is to deal with mathematical analysis of natural convection energy transport driven by combined buoyancy effects of thermal and solutal diffusion in a trapezoidal enclosure. Casson fluid rheological constitutive model depicting attributes of viscoelastic liquids is envisioned. The influence of the inclined magnetic field governed by Lorentz field law is also considered. To raise the essence of the presently used computational and physical domain, an innovative structural design called fillet is capitalized at the edges of the cavity. A numerical solution of the leading formulation is sought through Galerkin finite element discretization. Momentum, temperature, and concentration equations are interpolated by quadratic polynomials, whereas pressure distribution is approximated by a linear interpolating function. Domain discretized version is evaluated in view of triangular and rectangular elements. Newton's scheme is employed to resolve the non-linearly discretized system and a matrix factorization-based non-linear solver renowned as PARADISO is used. Validation of results is ascertained by forming an agreement with existing studies. Streamlines, isothermal and iso concentration contours patterns are portrayed to evaluate variation inflow distributions. Kinetic energy, local heat, and mass fluxes are also divulged in graphical and tabular formats.
Drukowanie trwałych elementów z żywic utwardzanych światłem lasera w technologii SLA
- Dawid Zieliński
2022 Full text Materiały & Maszyny Technologiczne
Żywice stanowią ważny materiał służących do wytarzania określonych elementów technicznych w wielu obszarach współczesnego i nowoczesnego przemysłu. Niniejsze opracowanie poświęcono charakterystyce najstarszej z metod druku 3D na świecie – technologii stereolitografii. Omówiono zasadę działania i budowy modelu fizycznego, a także dokonano charakterystyki jej kluczowych czynników związanych z parametrami drukarki wraz z porównaniem jej różnych konfiguracji, generowaniem struktur podporowych oraz najczęściej występującymi defektami drukowanych części. Ponadto wskazano i scharakteryzowano główne grupy materiałów wykorzystywanych w procesie druku 3D oraz najważniejsze korzyści i ograniczenia w szerszym zastosowaniu technologii stereolitografii. Końcowa część opracowania stanowi podsumowanie, w którym zawarto wykaz praktycznych wskazówek umożliwiających wytwarzanie trwałych elementów żywicznych.
Duhem and Natanson: Two Mathematical Approaches to Thermodynamics
- Janusz Badur
- Michel Feidt
- Paweł Ziółkowski
2022 Full text ENERGIES
In this article, the previously unrecognized contributions of Pierre Duhem and Ladislavus Natanson in thermodynamics are shown. The mathematical remodelling of a few of their principal ideas is taken into consideration, despite being neglected in the literature. To emphasize these ideas in an appropriate epistemological order, it would be crucial to first revalue and reconstruct some underrepresented parts of the proceedings process through which Duhem and Natanson created their thermodynamics. Duhem and Natanson’s scientific works are against the background of modern continuum mechanics, presenting relevant approaches. In line with the long-held beliefs of many French and Polish researchers, the article mentions that Duhem and Natanson’s ideas dated back to one century ago. Both scientists were qualified in the same Royal Way, which in this case includes chemistry, mechanic of fluid and solid, electro-chemistry, thermodynamics, electrodynamics, and relativistic and quantum mechanics. Therefore, it is possible to connect and then compare the results of their conceptions and approaches. Duhem and Natanson are both in firm opposition with Newtonian mechanisms. Thus, the Maupertuis least action principle created the ground for their efforts, in which they flourished as an elementary quantum.
Dwa dni
- Krzysztof Wróblewski
2022
Dwa Dni, 1995 r., olej/płótno, 116 x 179 cm (dyptyk), sygnowany, datowany i opisany na odwrocie: KRZYSZTOF WRÓBLEWSKI | olej, płótno | "DWA DNI" | 116 x 179 cm | 1995 | monogram KW | wskazówki montażowe
Dynamic fracture of brittle shells in a space-time adaptive isogeometric phase field framework
- Karsten Paul
- T.j.r. Hughes
- Chad Landis
- Roger Sauer
2022
Phase field models for fracture prediction gained popularity as the formulation does not require the specification of ad-hoc criteria and no discontinuities are inserted in the body. This work focuses on dynamic crack evolution of brittle shell structures considering large deformations. The energy contributions from in-plane and out-of-plane deformations are separately split into tensile and compressive components and the resulting coupled system is discretized within the isogeometric analysis framework. The resulting system is solved fully monolithically and adaptive local refinement is used in space and time.
Dynamic Positioning Capability Assessment for Ship Design Purposes
- Agnieszka Piekło
- Anna Witkowska
- Tomasz Zubowicz
2022 Full text
The article focuses on solving a problem of optimal thrust distribution over the actuators in a ship Dynamic Positioning, according to DNV-ST-0111 standard, Level 1. The classic Quadratic Programming approach is combined with the numerical solusion used to handle the propeller with the rudder constraints in the optimization task and the influence between thrusters and skeg. It is presented as an efficient method of minimizing the power consumption. The resulting tool for performing a Dynamic Positioning capability assessment allows for fast calculations to qualitatively compare different designs. The study has proven that the Quadratic Programming based method gives less optimistic solution in comparison with DNV tool and can be safely applied at an early design stage. Further validation of the tool with the time-domain simulations would contribute to increasing confidence in its application to the daily routine calculations.
Dynamical nonlocality in quantum time via modular operators
- I. L. Paiva
- Marcin Nowakowski
- Eliahu Cohen
2022 Full text PHYSICAL REVIEW A
We formalize the concept of the modular energy operator within the Page and Wootters timeless framework. As a result, this operator is elevated to the same status as the more studied modular operators of position and momentum. In analogy with dynamical nonlocality in space associated with the modular momentum, we introduce and analyze the nonlocality in time associated with the modular energy operator. Some applications of our formalization are provided through illustrative examples.