2022 - Repozytorium publikacji - Politechnika Gdańska

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The potential of computational methods for the categorization of architectural objects on the example of media architecture
- Karolina Życzkowska
- Marcin Życzkowski
2022 Pełny tekst TASK Quarterly
The paper presents an example of the categorization of architectural objects and assessment of the characteristics of urban space, based on the analysis of specific features of architectural objects and urban landscape. The conducted analysis refers to media architecture and is presented in the complex context of the development of media solutions. The field of influence of IT on architecture is also stressed, both on the architect’s work and the image of the city, including with regard to smart city strategies. Agradual simplification approach was proposed for atargeted analysis. Data on media architecture were collected and, on their basis, significant features of each architectural object and its surrounding space were identified. The qualification of representative categories of media solutions was made based on the function of the object and the role of the media archi-tecture object in the visual structure of the space, indicating the method of determining the degree of legibility of the space for agiven category. The proposed process of categorization is astarting point in the discussion about the need and opportunities to use computational methods and databases supporting the assessment of the architectural typologies and characteristics of space, in reference to urban development.
The Practice of Dyadic Interviewing: Strengths, Limitations and Key Decisions
- Joanna Szulc
- Nigel King
2022 Pełny tekst Forum Qualitative Sozialforschung / Forum: Qualitative Social Research (FQS)
Dyadic interviews, in which two participants are interviewed together, are becoming more popular in qualitative research, but are much less discussed in the methodological literature than individual and group forms. In this article, we consider the nature and value of dyadic interviews, recognizing them as active, relational encounters, shaped by what all parties bring to them, and infused with issues of power. Drawing on our research on altruistic motivation which involved 47 dyadic interviews conducted with 94 individuals and post-interview feedback from participants, we demonstrate the strengths and point out some of the potential pitfalls associated with the dyadic format, focusing on the practical and ethical issues in defining and recruiting dyads and the practice of conducting such interviews. We provide recommendations for researchers interested in using this method, and suggest research priorities for the further development of dyadic interviewing.
THE PROTECTIVE MEASURES AGAINST SARS-COV-2 INFECTION IN THE SEAFOOD COMPANY FROM THE PERSPECTIVE OF THE EMPLOYEES
- Piotr Grudowski
- Tomasz Grybek
- Małgorzata Wiśniewska
2022 Pełny tekst Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska
Purpose: To identify and discuss the protective measures implemented to prevent SARS-CoV-2 infection among employees. Design/methodology/approach: The four-stage course of research. Case study and structured interviews with all employees, directly and indirectly, involved in food processing. Research questions: (R1) What measures have been taken to prevent the risk of infection among employees? (R2) What activities and responsibilities were the most difficult and easiest for employees to follow when implementing these measures? Findings: Administrative protective measures dominate in the organization. Wearing additional protective equipment, keeping distance, and following new hygienic procedures are the most difficult issues. Temperature self-measurement and signing of health declarations are not a problem for employees. It is a need to listen to employees about the protective measures. Research limitations/implications: The results refer to one unique case and should not be generalized. However, it is clear that protective measures and their implementation seem to make employees more aware of potential hazards. Therefore, the questions included in our interview can be recommended for use in other organizations, not only in food companies. Originality/value: The article fills in the research gap. According to the authors' knowledge, this is the first study in Poland that is based on the experience of a food company.
The role and scope of architectural and conservation research procedures in the process of restoring the splendour of an architectural monument created after 1945 on the example of the Suburban Railway Station in Gdynia
- Anna Orchowska-Smolińska
- Anna Kriegseisen
2022 Pełny tekst Architectus
Modern Movement buildings, despite their relatively recent construction, are sometimes affected by radical transformations of layout and form. The railway stations being one of the most important public buildings in the city are a special group of them. Due to long-term and intensive use they may bear the signs of exploitation of parts of its substance and have secondary transformations disharmony with the building. The subject of the article are architectural and conservation studies of the Suburban Railway Station in Gdynia, built in the mid-1950s. The authors of the article set themselves the goal of presenting the research procedures developed for it in the years 2016–2022, which are an introduction to revaluation process. The research methods used during the field work made it possible to identify the originally used techniques of execution and finishing methods and to determine the procedures for their reconstruction using conservation methods. The results of the conducted research became the basis for determining the scope of conservation protection of the station building, as well as the possibility of interfering with its partly “functionless” substance through adaptation and modernization activities.
The role of centrifugal partition chromatography in the removal of β-asarone from Acorus calamus essential oil
- Paweł Szczeblewski
- Mateusz Wróblewski
- Julia Borzyszkowska-Bukowska
- Tetiana Bairamova
- Justyna Górska
- Tomasz Laskowski
- Anna Samulewicz
- Michał Kosno
- Łukasz Sobiech
- Justyna Polit
- Wirginia Kukula-Koch
2022 Pełny tekst Scientific Reports
Β-asarone is a phenylpropane derivative present in the rhizomes of Acorus calamus, that was proved to exhibit toxic effects in humans. Because of its presence the whole plant that is commonly used in traditional medicine for its sedative, anti-inflammatory, neuroprotective and other properties has limited application nowadays. In the study, qualitative and quantitative analysis of a collection of nine essential oil (EO) samples of European and Asian origin was performed. The final content of β-asarone in the tested samples ranged between 0.265 and 1.885 mg/mL. Having in mind a possible application of the EO as a biopesticide, this research aimed at the development of CPC-based purification protocol that could help remove β-asarone from EO. It was proved that the biphasic solvent system composed of n-hexane/EtOAc/MeOH/water, 9:1:9:1 (v/v/v/v) was capable of the removal of the toxic constituent in the CPC chromatograph operated in the ascending elution mode with 2200 rpm and a flow rate of 5 mL/min. The chromatographic analysis that lasted only 144 min effectively separated β-asarone (purity of 95.5%) and α-asarone (purity of 93.7%) directly from the crude Acorus calamus rhizome EO.
The role of electrolysis and enzymatic hydrolysis treatment in the enhancement of the electrochemical properties of 3D-printed carbon black/poly(lactic acid) structures
- Adrian Koterwa
- Iwona Kaczmarzyk
- Szymon Mania
- Mateusz Cieślik
- Robert Tylingo
- Tadeusz Ossowski
- Robert Bogdanowicz
- Pawel Niedzialkowski
- Jacek Ryl
2022 Pełny tekst APPLIED SURFACE SCIENCE
Additive manufacturing, also known as 3D printing, is beginning to play an unprecedented role in developing many applications for industrial or personalized products. The conductive composite structures require additional treatment to achieve an electroactive surface useful for electrochemical devices. In this paper, the surfaces of carbon black/poly(lactic acid) CB-PLA printouts were activated by electrolysis or enzymatic digestion with proteinase K, or a simultaneous combination of both. The proposed modification protocols allow the tailoring of electrochemically active surfaces and electron transfer kinetics determined by electrochemical techniques (CV, EIS) by [Fe(CN)6]4-/3- redox probe. X-ray photon spectroscopy and SEM imaging were applied to determine the delivered surface chemistry. CB-PLA hydrolysis under alkaline conditions and anodic polarization greatly impacted the charge transfer kinetics. The enzymatic hydrolysis of PLA with proteinase K led to highly efficient results, yet requires an unsatisfactory prolonged activation duration of 72 h, which can be efficiently reduced by electrolysis carried out in the presence of the enzyme. Our studies hint that the activation protocol originates from surface electropolymerization rather than a synergistic interaction between the electrolysis and enzymatic hydrolysis. The detailed mechanism of CB-PLA hydrolysis supported by electrolysis is a promising new route to achieve time-efficient and environmentally-friendly activation procedure.
The role of the One-Belt One-Road initiative in China's exports and global value chains
- Joanna Wolszczak-Derlacz
- Yuxin Lu
2022 Pełny tekst EQUILIBRIUM Quarterly Journal of Economics and Economic Policy
Research background: China is regarded as the “world factory” highly involved in international trade and plays an increasingly important role in the global value chains (GVC). Additionally, the “One-Belt One-Road” (OBOR) initiative was proposed by the Chinese government to further promote China in the international market. Purpose of the article: The article explores the role of the OBOR in China’s exports and global value chain. It aims at: 1) verifying how OBOR impacts the volume of China's export and valueadded export to its partners. 2) checking whether or not OBOR strengthens the industrial connection between China and its participants at the GVC level. 3) examining the different roles of corridors in China's exports and GVC. Methods: The empirical analysis is based on the augmented gravity model of international trade, which comprises China and its 197 partners in the period 2000–2018. The model is estimated for gross export as well GVC measured by domestic value added in export and the value contributed by a partner to China’s exports. Findings & value added: In general, there is a significant positive correlation between OBOR and the volumes of China’s export, domestic value-added trade and the value of partner’s contributed in China’s export. However, some of the results are blurred by OLS and FE methods. The author points out that FE-PPML estimation methods are more adequate. Among the six economic corridors, Bangladesh-China-India-Myanmar (BCIM), China-Pakistan (CP) and China IndochinaPeninsula (CIP) were proven to play a prominent role in promoting China’s export, DVA and strengthening the links of global value chains. It is worth noting that the China-Mongolia-Russian Federation (CMRF) corridor harms China's export and DVA trade, and at the same time promotes countries in its region that benefit from trade with China
The Rule-Based Model of Negentropy for Increasing the Energy Efficiency of the City’s Digital Transformation Processes into a Smart City
- Cezary Orłowski
- Piotr Cofta
- Aleksander Orłowski
2022 Pełny tekst ENERGIES
The aim of the article is to build a rule-based model (RMFDN) for increasing the energy efficiency of Smart Cities’ digital transformation processes. The problem that arises during the implementation of digital transformation processes concerns the measures that should be assigned to estimate the duration of the digital transformation. Previous studies of digital transformation have been based on the analysis of design processes based on key performance indicators (KPIs), their place and role in the digital transformation processes, and their monitoring with the use of information architecture. The analysis of the digital transformation processes of cities into Smart Cities shows that they seem inappropriate to the complexity and uncertainty of the digital transformation carried out. The new approach presented in the article is based on three key aspects: rule-based description of the state of digital transformation processes enabling their energy assessment, introducing energy maturity capsules to describe the state of these processes and application of measures based on project negentropy increments for maturity capsules.
The use of a two-phase Monte Carlo material model to reflect the dispersion of asphalt concrete fracture parameters
- Cezary Szydłowski
- Łukasz Smakosz
- Marcin Stienss
- Jarosław Górski
2022 Pełny tekst THEORETICAL AND APPLIED FRACTURE MECHANICS
The work covers comprehensive laboratory tests of semi-circular bending (SCB) of asphalt concrete samples. The results of two test series, including four and 32 SCB specimens, indicate a substantial scatter of force–deflection (F-d) histories. The numerical analysis is aimed to reflect the maximum breaking load and fracture energy of the samples, pointing out their random character. The original simulation-based fictitious Monte Carlo material model was introduced. The authors’ algorithm randomly assigns asphalt mortar and coarse aggregate parameters to the finite elements of the numerical model. As a result, sets of random fields are generated to reflect the two-phase material distribution in the samples. The model parameters are numerically adjusted based on laboratory test results of the initial four SCB specimens. In the course of model verification, the 32-sample computations were compared with the laboratory data. The results of FEM simulations are consistent with laboratory test results, including dispersion of fracture parameters. The proposed computational algorithm with a two-phase material model is ready to be implemented in the analysis of actual road pavement constructions and may support the design process.
The Use of Direct Shear Test for Optimization of Interlayer Bonding Under a Poroelastic Layer
- Piotr Jaskuła
- Dawid Ryś
- Marcin Stienss
- Cezary Szydłowski
2022
Poroelastic Road Surfaces (PERS) are characterised by porous structure with air void content of 20% or higher and stiffness almost 10 times lower than that of a standard asphalt course. Such properties enable noise reduction by up to 12 dB in comparison to SMA 11 mixture. However, the disadvantage of a poroelastic pavement is its low durability, which partially results from delamination from the lower layer. The paper aims to investigate the effect of type and amount of tack coat used as well as the texture of the lower layer on interlayer bonding, to better recognise the issue of bonding under the poroelastic layer. For this purpose, direct shear test with monotonic and cyclic load was performed for 44 types of layer interfaces. The effect of type and amount of bituminous emulsion used for tack coat as well as the impact of lower layer surface were distinguished. The results of the analysis indicated that tack coats made from softer residual bitumen (70/100) exhibited better fatigue resistance, while polymer modification had minor effect. Moreover, milling of the lower layer resulted in a significant increase in shear strength. Finally, several types of layer interfaces were selected to be constructed in the full-scale test sections.
The use of GFRP tubes as load-bearing jackets in concrete-composite columns
- Marcin Abramski
- Błażej Chmielnicki
2022 Pełny tekst Civil and Environmental Engineering Reports
The paper presents the fields of applications of polymer composites in building structures. The use of composite glass fibre tubes is discussed in more detail. The laboratory methods used to test the mechanical properties of these pipes are presented. An original research program is presented, including six concrete-filled glass fibre tubes. The cylinders and columns made in this way were tested for their axial load capacity. Conclusions were formulated regarding the relationship between the load-bearing capacity of the test elements and their length, as well as the angle of glass fibres arrangement in the tube composite.
The use of machine learning for face regions detection in thermograms
- Mariusz Kaczmarek
- Julia Guzik
2022
The aim of this study is to analyse the methods of detecting characteristic points of the face in thermographic images. As part of the implementation an extensive analysis of scientific publications covering similar issues both for the analysis of images made in visible light and thermographic images was carried out. On the basis of this analysis, 3 models were selected and then they were implemented and tested on the basis of test images. Finally, two models were selected, the operation of which was documented on thermographic images - DAN and AAM, as well as one model that was tested for RGB images - the ERT model. Satisfactory detection parameters were achieved in the experiment.
The valance state of vanadium-key factor in the flexibility of potassium vanadates structure as cathode materials in Li-ion batteries
- M. Prześniak-Welenc
- Małgorzata Nadolska-Dawidowska
- Kacper Jurak
- J. Li
- K. Górnicka
- A. Mielewczyk-Gryń
- M. Rutkowska
- A. P. Nowak
2022 Pełny tekst Scientific Reports
Potassium hexavanadate (K2V6O16·nH2O) nanobelts have been synthesized by the LPE-IonEx method, which is dedicated to synthesis of transition metal oxide bronzes with controlled morphology and structure. The electrochemical performance of K2V6O16·nH2O as a cathode material for lithium-ion batteries has been evaluated. The KVO nanobelts demonstrated a high discharge capacity of 260 mAh g−1, and long-term cyclic stability up to 100 cycles at 1 A g−1. The effect of the vanadium valence state and unusual construction of the nanobelts, composed of crystalline and amorphous domains arranged alternately were also discussed in this work. The ex-situ measurements of discharged electrode materials by XRD, MP-AES, XAS and XPS show that during the subsequent charge/discharge cycle the potassium in the K2V6O16·nH2O structure are replacing by lithium. The structural stability of the potassium hexavandate during cycling depends on the initial vanadium valence state on the sample surface and the presence of the “fringe free” domains in the K2V6O16·nH2O nanobelts.
The vibration-based assessment of the influence of elevated temperature on the condition of concrete beams with pultruded GFRP reinforcement
- Beata Zima
- Marcin Krajewski
2022 Pełny tekst COMPOSITE STRUCTURES
Concrete beams reinforced with glass fiber reinforced polymer (GFRP) bars subjected to elevated temperature have been experimentally studied. The influence of high temperatures on GFRP-reinforced concrete beams condition has been check both, destructively and nondestructively. The nondestructive tests foresaw vibration-based tests to obtain the natural frequency values after exposure to varying temperatures. The vibration-based tests allowed for the indirect observation of beams stiffness reduction after exposure to elevated temperature. The approach based on frequency response function (FRF) turned out to be efficient even in the case of relatively low temperatures (120⁰C). The investigation involved also destructive tests which were conducted in various conditions: once the bending load and elevated temperature were applied at the same time and in the next case, the destructive tests were conducted after heating and cooling down the experimental objects. The study proved that the increase of the temperature causes the reduction of characteristic mechanical parameters, regardless the beams were cooled down or not. However, the simultaneous action of bending load and elevated temperature resulted in a greater reduction of the ultimate strength of tested objects.
The Way One Defines Specification Matters: On the Performance Criteria for Efficient Antenna Optimization in Aggregated Bi-Objective Setups
- Adrian Bekasiewicz
- Michał Czyż
2022 Pełny tekst
Design of antenna structures for real-world applications is a challenging task that often involves addressing multiple design requirements at a time. Popular solution approaches to this class of problems include utilization of composite objectives. Although configuration of such functions has a significant effect on the cost and performance of the optimization, their specific structure is normally determined based on engineering experience and does not involve auxiliary investigations oriented towards adjustment of process efficiency. In this work, the effects of used functions and their composition on performance and cost of the bi-objective optimization process are investigated. The balance between the requirements is tailored to the problem at hand based on visual inspection of functional landscapes. The analyses are performed on a case study basis using a planar, multi-parameter antenna optimized for minimization of footprint and reflection within the 3.1 GHz to 10.6 GHz range. The numerical results show significant differences between the performance of the obtained solutions, as well as the computational cost of the optimization. The best geometry found using one of the considered objective functions is characterized by an in-band reflection of –9.6 dB and the footprint of only 171 mm2.
Theoretical designing of selenium heterocyclic non-fullerene acceptors with enhanced power conversion efficiency for organic solar cells: a DFT/TD-DFT-based prediction and understanding
- Muhammad Khan
- Hameed Haq
- Saira Abbasi
- Shan E Zehra Syeda
- Muhammad Arshad
2022 JOURNAL OF MOLECULAR MODELING
In this study, we have designed and explored a new series of non-fullerene acceptors for possible applications in organic solar cells. We have designed four molecules named as APH1 to APH4 after end-capped modification of recently synthesized Y6-Se-4Cl molecule. Density functional theory and time dependent-density functional theory have been employed for computing geometric and photovoltaic parameters of the designed molecules. Designed molecules have displayed high values of fill factor and FF%. Further, high mobility of electrons and holes between metal electrodes are also noted for designed molecules. Good values of open circuit voltage enhance the power conversion efficiency in the APH1–APH4. Frontier molecular orbitals analysis and excitation energy values suggested easy transportation of charges between molecular orbitals. Moreover, red-shifting in the absorption spectrum with high oscillating strength is also noted in APH1 to APH4 as compared to reference molecules. Results of different opto-electronic and photovoltaic parameters recommended that APH1 to APH4 are effective contributors for the development of high performance organic solar cells.
Theoretical examination of the fracture behavior of BC3 polycrystalline nanosheets: Effect of crack size and temperature
- Ali Dadrasi
- Alireza Albooyeh
- Sasan Fooladpanjeh
- Azam Salmankhani
- Amin Hamed Mashhadzadeh
- Mohammad Saeb
2022 INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
2D carbon graphene nanostructures are elements of advanced materials and systems. This theoretical survey provides explanation to the mechanical and fracture behavior of mono- and polycrystalline BC3 nanosheets (denoted as MC- and PCBC3NS, respectively) as a function of temperature and the type of crack defects. The mechanical performance of PCBC3NS at elevated temperatures was monitored varying the number of grain boundaries (the main source of stress concentration) by considering structural defects forming during the crystal growth. Molecular dynamics (MD) simulation was applied as a cost-effective technique to model and test MC- and PCBC3NS by selecting the proper potential function and boundary conditions. The results demonstrated that the mechanical properties of the perfect crystalline PCBC3NS was decreased by increase of the number of grains, particularly when the grain numbers were equal to or more than 36. For defective PCBC3NS, the mechanical properties were decreased by the crack length and the temperature. The lowest values of the Young's modulus, failure stress, and failure strain were assigned to the PCBC3NS having the crack length of L/2 at 1000 K, respectively by 23%, 46%, and 33% lower than the corresponding defect-free PCBC3NS. The crack tip played a key role in failure behavior, even more that the number of grain boundaries. Eventually, the critical stress intensity was decreased gradually by increasing the temperature. The results of this work can be generalized to more complicated cases to deepen understanding and predict fracture fingerprint of the next generations of 2D nanostructures.
Thermal buckling of functionally graded piezomagnetic micro- and nanobeams presenting the flexomagnetic effect
- Mohammad Malikan
- Tomasz Wiczenbach
- Victor Eremeev
2022 Pełny tekst CONTINUUM MECHANICS AND THERMODYNAMICS
Galerkin weighted residual method (GWRM) is applied and implemented to address the axial stability and bifurcation point of a functionally graded piezomagnetic structure containing flexomagneticity in a thermal environment. The continuum specimen involves an exponential mass distributed in a heterogeneous media with a constant square cross section. The physical neutral plane is investigated to postulate functionally graded material (FGM) close to reality. Mathematical formulations concern the Timoshenko shear deformation theory. Small scale and atomic interactions are shaped as maintained by the nonlocal strain gradient elasticity approach. Since there is no bifurcation point for FGMs, whenever both boundary conditions are rotational and the neutral surface does not match the mid-plane, the clamp configuration is examined only. The fourth-order ordinary differential stability equations will be converted into the sets of algebraic ones utilizing the GWRM whose accuracy was proved before. After that, by simply solving the achieved polynomial constitutive relation, the parametric study can be started due to various predominant and overriding factors. It was found that the flexomagneticity is further visible if the ferric nanobeam is constructed by FGM technology. In addition to this, shear deformations are also efficacious to make the FM detectable.
Thermal cooling process by nanofluid flowing near stagnating point of expanding surface under induced magnetism force: A computational case study
- Faisal Shahzad
- Wasim Jamshed
- Amjad Ali Pasha
- Rabia Safdar
- Md. Mottahir Alam
- Misbah Arshad
- Syed M. Hussain
- Muhammad Bilal Hafeez
- Marek Krawczuk
2022 Pełny tekst Case Studies in Thermal Engineering
This paper is dedicated to the exam of entropy age and research of the effect of mixing nanosolid additives over an extending sheet. In this review, Newtonian nanofluid version turned into researched at the actuated appealing field, heat radiation and variable heat conductivity results. With becoming modifications, the proven PDEs are moved into popular differential situations and paintings mathematically making use of a specific mathematical plan called the Keller box method (KBM). The ranges of different dimensionless parameters used in our study are volume fraction of nanoparticles 0.01≤ϕ≤0.04, magnetic parameter 0.5≤Λ≤2, heat source/sink parameter 0.5≤Q0≤2, Prandtl number 5.7≤Pr≤6.2, Reynolds number 5≤Re≤15, which shows up during mathematical arrangement are shown as tables and charts. Positive modifications in heat radiation and heat conductivity affects increment the hotness pass coefficient of solar primarily based totally plane wings. Titanium alloy primarily based totally water (H2O) are taken into consideration for our research. We can see that because the Reynolds range and Brinkman range increment, the entropy increments. The thermodynamic exhibition of Titanium alloy-water (Ti6Al4V- H2O) nanofluid has been portrayed higher that of base nanofluid with comparable situations. Recorded hypothetical reproductions may be greater beneficial to similarly increase daylight primarily based totally nuclear strength frameworks
Thermal degradation of polylactic acid (PLA)/polyhydroxybutyrate (PHB) blends: A systematic review
- Mael Kervran
- Christelle Vagner
- Marianne Cochez
- Marc Ponçot
- Mohammad Saeb
- Henri Vahabi
2022 POLYMER DEGRADATION AND STABILITY
Polylactic acid (PLA) and polyhydroxybutyrate (PHB) are two biopolyesters obtained from renewable resources like corn or sugar under bacterial fermentation. PLA is the most widely used biopolymer in diverse applications. Addition of PHB to PLA can improves the crystallinity of PLA, and thereby its mechanical strength. However, both PLA and PHB suffer from poor thermal stability, which limits their potential industrial application. The purpose of this review is to explain thermal decomposition behavior and mechanism of these polymers and systematically categorize available reports on thermal degradation of the neat PLA and PHB, and also as-processed PLA/PHB blends along with PLA/PHB blends modified/reinforced with plasticizers, additives or crosslinkers. The characteristic temperatures (Tonset, and peak temperature or Tmax) of PLA and PHB are taken as the key parameters governing thermal degradation behavior of PLA/PHB blends and composites with variable composition. From this survey we can conclude that the thermal stability of PLA in PLA/PHB blend is lower than the neat PLA, contrary to the PHB with higher thermal stability in PLA/PHB blend. Therefore, thermal degradation mechanism of PLA/PHB blends must be taken as a complex physico-chemical phenomenon. Moreover, the selection of additive severely affects the thermal stability of PLA/PHB blends. Processing method and localization of additive in different phases or at the interface of the phases are factors determining the ultimate thermal stability of blend.