Repozytorium publikacji - Politechnika Gdańska

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Repozytorium publikacji
Politechniki Gdańskiej

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  • Oznaczenie rtęci w tytoniu cygarowym jako wyzwanie analityczne
    • Paweł Hać
    • Bartłomiej Cieślik
    • Piotr Konieczka
    2020 Pełny tekst Analityka: Nauka i Praktyka

    Przed wybuchem pandemii COVID-19 obserwowano wyraźny i systematyczny wzrost rynku cygarowego, a co za tym idzie, również i grona cigar aficionado, czyli miłośników cygar. W pracy poruszono tematykę zawartości rtęci w cygarach i przedstawiono wyniki przeprowadzonych badań. Z racji wielu podobieństw porównano ją z zawartością tego pierwiastka w tytoniu papierosowym. Stężenie Hg w tytoniu papierosowym na przestrzeni kilkudziesięciu lat wyraźnie spadło. Analizując literaturę zauważyć można, że stężenie rtęci w cygarach jest większe aniżeli w papierosach, od czego odbiegają wyniki przeprowadzonych badań własnych. Większość uzyskanych stężeń mieści się w zakresie odpowiadającemu tytoniowi papierosowemu z przytaczanych prac, choć niektóre wartości są nawet kilkukrotnie wyższe. Przyczyny tego doszukiwać się można najprawdopodobniej w ewentualnym stosowaniu środków ochrony roślin lub nawozów zawierających rtęć.

  • Paenibacillus alvei MP1 as a Producer of the Proteinaceous Compound with Activity against Important Human Pathogens, Including Staphylococcus aureus and Listeria monocytogenes
    • Magdalena Pajor
    • Zirui Ray Xiong
    • Randy Worobo
    • Piotr Szweda
    2020 Pełny tekst Pathogens

    An emerging need for new classes of antibiotics is, on the one hand, evident as antimicrobial resistance continues to rise. On the other hand, the awareness of the pros and cons of chemically synthesized compounds’ extensive use leads to a search for new metabolites in already known reservoirs. Previous research showed that Paenibacillus strain (P. alvei MP1) recovered from a buckwheat honey sample presented a wide spectrum of antimicrobial activity against both Gram-positive and Gram-negative pathogens. Recent investigation has confirmed that P. alvei MP1 (deposited at DDBJ/ENA/GenBank under the accession WSQB00000000) produces a proteinaceous, heat-stable compound(s) with the maximum antimicrobial production obtained after 18 h of P. alvei MP1 growth in LB medium at 37 °C with continuous shaking at 200 RPM. The highest activity was found in the 40% ammonium sulfate precipitate, with high activity also remaining in the 50% and 60% ammonium sulfate precipitates. Moderate to high antimicrobial activity that is insensitive to proteases or heat treatment, was confirmed against pathogenic bacteria that included L. monocytogenes FSL – X1-0001 (strain 10403S), S. aureus L1 – 0030 and E. coli O157: H7. Further studies, including de novo sequencing of peptides by mass spectrometry, are in progress

  • Paired domination subdivision and multisubdivision numbers of graphs
    • Joanna Raczek
    • Magda Dettlaff
    2020 Pełny tekst Journal of Combinatorial Mathematics and Combinatorial Computing

    The paired domination subdivision number sdpr(G) of a graph G is the minimum number of edges that must be subdivided (where an edge can be subdivided at most once) in order to increase the paired domination number of G. We prove that the decision problem of the paired domination subdivision number is NP-complete even for bipartite graphs. For this reason we define the paired domination muttisubdivision number of a nonempty graph G, denoted by msdpr(Cr), as the minimum positive integer k such that there exists an edge which must be subdivided k times to increase the paired domination number of G. We show that msdpr(Gr) < 4 for any graph G with at least one edge. We also determine paired domination multisubdivision numbers for some classes of graphs. Moreover, we give a constructive characterizations of all trees with paired domination multisubdivision number equal to 4.

  • PAM-Panorama
    • Luciano Segreto
    2020

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  • PARAMETERS OF THE ELECTROPHORETIC DEPOSITION PROCESS AND ITS INFLUENCE ON THE MORPHOLOGY OF HYDROXYAPATITE COATINGS. REVIEW
    • Aleksandra Laska
    • Michał Bartmański
    2020 Pełny tekst Inżynieria Materiałowa

    Metallic materials intended for bone implants should exhibit not only appropriate mechanical properties, but also high biocompatibility. The surface treatment modifications, for example acidic treatment, laser treatment, ion implantation and deposition of highly biocompatible coatings, are practiced. One of the most popular methods of surface modification is to deposit hydroxyapatite (HAp) coatings. HAp naturally occurs in human body, but can be also synthesized in laboratory conditions. Among diverse deposition techniques, electrophoretic deposition (EDP) is a cost-effective method in which charged particles, dispersed in an organic medium, after applying voltage migrate to the counter charged electrode forming a thin coating. There are several parameters that can be controlled during the process and that directly affect the morphology of the surface. The zeta potential and pH of prepared colloidal suspension are closely related to suspension stability and affect the susceptibility for agglomeration of the particles. Electrical settings, especially applied voltage, affect primarily the mass of deposition, but also the porosity of the coating, as well as its homogeneity. One of the basic parameters of EDP method is time of process. With increasing process time, the thickness of the deposited coating increases. Importantly, its mechanical properties also decrease. Moreover, the particles shape and size also affect the morphology of the deposited coating. The analysis of many variables is necessary to choose the right parameters to obtain the coating with desired morphology. In this paper, the influence of each parameter on the morphology of hydroxyapatite coatings is discussed.

  • Parametric method applicable in assessing breakout force and time for lifting slender bodies from seabed
    • Jan Michalski
    2020 Pełny tekst Polish Maritime Research

    The article presents a parametric method applicable in assessing the suction force of a slender body to the seabed, and prognosing the body extrication time. Along with the body weight in water, the information on the suction force is essential for assessing the force needed to lift the object from the seabed. Based on the Foda theory and the resulting integral equation, which relates the maximum suction force with basic parameters of the issue of concern, the parametric method has been developed which can be widely applied in engineering practice of lifting objects. A set of discrete values of parameters selected from the range of typical values for engineering practice was the basis for developing algebraic formulas approximating the integral Foda equation for slender bodies. The included results of tests present the variability of suction force characteristics and the envelopes of maximum forces needed to extricate the body from the seabed.

  • Parametric optimization of sandwich composite footbridge with U-shaped cross-section
    • Tomasz Ferenc
    • Tomasz Mikulski
    2020 Pełny tekst COMPOSITE STRUCTURES

    Parametric optimization of sandwich composite footbridge was presented in the paper. Composite footbridge has 14,5 m long and has U-shaped cross-section with inner dimensions 2,6 × 1,3 m. The sandwich structure in made from GFRP laminate as a faces and PET foam as a core. The aim of analysis was to minimize the mass of the new footbridge that can lead to minimize the cost of structure. After optimization was conducted, the new structure was compare with the realized one. The results show that while mass can be decreased the state variables of structure like maximum displacement, strain or natural frequency do not change significantly. Moreover, results show that, although the mass is decreased, stiffness of the new structure is even higher. Optimization and sensitivity analysis, the divisions of theory of designing, provide the designer a significant support. Despite presented optimization, also sensitivity analysis can additionally be effectively used in issues related to strengthening or modernizing structures as well as in the process of identifying quantities describing the computational model.

  • Parametric Study on a Performance of a Small Counter-Rotating Wind Turbine
    • Michał Pacholczyk
    • Dariusz Karkosiński
    2020 Pełny tekst ENERGIES

    A small Counter-Rotating Wind Turbine (CRWT) has been proposed and its performancehas been investigated numerically. Results of a parametric study have been presented in this paper.As parameters, the axial distance between rotors and a tip speed ratio of each rotor have been selected.Performance parameters have been compared with reference to a Single Rotor Wind Turbine (SRWT).Simulations were carried out with Computational Fluids Dynamics (CFD) solver and a Large EddyScale approach to model turbulences. An Actuator Line Model has been chosen to represent rotors inthe computational domain. Summing up the results of simulation tests, it can be stated that whenconstructing a CRWT turbine, rotors should be placed at a distance of at least 0.5 D (where D is rotorouter diameter) or more. One can then expect a noticeable power increase compared to a singlerotor turbine. Placing the second rotor closer than 0.5 D guarantees a significant increase in power, butin such configurations, dynamic interactions between the rotors are visible, resulting in fluctuationsin torque and power. Dynamic interactions between rotor blades above 0.5 D are invisible.

  • Particle swarm optimization algorithms for autonomous robots with deterministic leaders using space filling movements
    • Doina Logofătu
    • Gil Sobol
    • Christina Andersson
    • Daniel Stamate
    • Kristiyan Balabanov
    • Tymoteusz Cejrowski
    2020 Pełny tekst Evolving Systems

    In this work the swarm behavior principles of Craig W. Reynolds are combined with deterministic traits. This is done by using leaders with motions based on space filling curves like Peano and Hilbert. Our goal is to evaluate how the swarm of agents works with this approach, supposing the entire swarm will better explore the entire space. Therefore, we examine different combinations of Peano and Hilbert with the already known swarm algorithms and test them in a practical challenge for the harvesting of manganese nodules on the sea ground with the use of autonomous agents. We run experiments with various settings, then evaluate and describe the results. In the last section some further development ideas and thoughts for the expansion of this study are considered.

  • Partycypacja obywatelska młodzieży w opinii gmin polskich na przykładzie projektu South Baltic Youth Core Group Network
    • Krystyna Gomółka
    • Izabela Borucińska
    2020 Pełny tekst

    Celem badań było ukazanie partycypacji obywatelskiej młodzieży w opinii gmin polskich na przykładzie projektu South Baltic Youth Core Group Network

  • Path Loss Analysis for the IoT Applications in the Urban and Indoor Environments
    • Piotr Rajchowski
    • Jarosław Sadowski
    • Olga Błaszkiewicz
    • Krzysztof Cwalina
    • Alicja Olejniczak
    2020

    The Internet of Things (IoT) networks concept implies their presence in a various and untypical locations, usually with a disturbed radio signals propagation. In the presented paper an investigation of an additional path loss observed in an underground environment was described. The proposed measurement locations correspond to the operation areas of rapidly growing narrowband IoT (NBIoT) networks, the ones using the Long Term Evolution (LTE) network resources. During the measurement campaign the received signal power (RSP) in an outdoor-to-indoor (OUT2IN) and outdoor-to-outdoor radio link was measured. After analysis of the measurement results obtained in the building floors and in a basement, it was possible to derive an assessment of the observed additional 11.4 dB - 18.3 dB attenuation of the RSP in the outdoor-to-basement communication regarding the typical signal reception on a building floor (OUT2IN).

  • Pathogenesis of psoriasis in the “omic” era. Part II. Genetic, genomic and epigenetic changes in psoriasis
    • Bogusław Nedoszytko
    • Aneta Szczerkowska-Dobosz
    • Marta Stawczyk-Macieja
    • Agnieszka Owczarczyk-Saczonek
    • Adam Reich
    • Joanna Bartosińska
    • Aleksandra Batycka-Baran
    • Rafał Czajkowski
    • Iwona T. Dobrucki
    • Lawrence W. Dobrucki
    • Magdalena Górecka-Sokołowska
    • Anna Janaszak-Jasiecka
    • Leszek Kalinowski
    • Dorota Krasowska
    • Dorota Purzycka-Bohdan
    • Adrianna Radulska
    • Edyta Reszka
    • Dominik Samotij
    • Marta Sobalska-Kwapis
    • Andrzej Słominski
    • Dominik Strapagiel
    • Justyna Szczęch
    • Michał Żmijewski
    • Roman J. Nowicki
    • Michal Zmijewski
    2020 Pełny tekst Postępy Dermatologii i Alergologii

    Psoriasis is a multifactorial disease in which genetic, environmental and epigenetic factors regulating gene expression play a key role. In the “genomic era”, genome-wide association studies together with target genotyping platforms performed in different ethnic populations have found more than 50 genetic susceptible markers associated with the risk of psoriasis which have been identified so far. Up till now, the strongest association with the risk of the disease has been proved for HLA-C*06 gene. The majority of other psoriasis risk SNPs are situated near the genes encoding molecules involved in adaptive and innate immunity, and skin barrier function. Many contemporary studies indicate that the epigenetic changes: histone modification, promoter methylations, long non-coding and micro-RNA hyperexpression are considered as factors contributing to psoriasis pathogenesis as they regulate abnormal keratinocyte differentiation and proliferation, aberrant keratinocytes - inflammatory cells communication, neoangiogenesis and chronic inflammation. The circulating miRNAs detected in the blood may become specific markers in the diagnosis, prognosis and response to the treatment of the disease. The inhibition of expression in selected miRNAs may be a new promising therapy option for patients with psoriasis.

  • Pathogenesis of psoriasis in the “omic” era. Part III. Metabolic disorders, metabolomics, nutrigenomics in psoriasis
    • Agnieszka Owczarczyk-Saczonek
    • Dorota Purzycka-Bohdan
    • Bogusław Nedoszytko
    • Adam Reich
    • Aneta Szczerkowska-Dobosz
    • Joanna Bartosińska
    • Aleksandra Batycka-Baran
    • Rafał Czajkowski
    • Iwona T. Dobrucki
    • Lawrence W. Dobrucki
    • Magdalena Górecka-Sokołowska
    • Anna Janaszak-Jasiecka
    • Leszek Kalinowski
    • Dorota Krasowska
    • Adrianna Radulska
    • Edyta Reszka
    • Dominik Samotij
    • Andrzej Słominski
    • Radomir Słominski
    • Marta Sobalska-Kwapis
    • Marta Stawczyk-Macieja
    • Dominik Strapagiel
    • Justyna Szczęch
    • Michał Żmijewski
    • Roman J. Nowicki
    2020 Pełny tekst Postępy Dermatologii i Alergologii

    Psoriasis is a systemic disease that is strictly connected with metabolic disorders (insulin resistance, atherogenic dyslipidemia, arterial hypertension, and cardiovascular diseases). It occurs more often in patients with a more severe course of the disease. Obesity is specially an independent risk factor and it is associated with a worse treatment outcome because of the high inflammatory activity of visceral fatty tissue and the production of inflammatory me - diators involved in the development of both psoriasis and metabolic disorders. However, in psoriasis the activation of the Th17/IL-17 and the abnormalities in the Th17/Treg balance axis are observed, but this pathomechanism does not fully explain the frequent occurrence of metabolic disorders. Therefore, there is a need to look for better biomarkers in the diagnosis, prognosis and monitoring of concomitant disorders and therapeutic effects in psoriasis. In addition, the education on the use of a proper diet as a prophylaxis for the development of the above disorders is an important element of holistic care for a patient with psoriasis. Diet may affect gene expression due to epigenetic modification which encompasses interactions of environment, nutrition and diseases. Patients with psoriasis should be advised to adopt proper diet and dietician support.

  • Peptide dendrimers as antifungal agents and carriers for potential antifungal agent—N3‐(4‐methoxyfumaroyl)‐(S)‐2,3‐ diaminopropanoic acid—synthesis and antimicrobial activity
    • Magdalena Stolarska
    • Katarzyna Gucwa
    • Zofia Urbańczyk-Lipkowska
    • Ryszard Andruszkiewicz
    2020 JOURNAL OF PEPTIDE SCIENCE

    A series of peptide dendrimers and their conjugates with antimicrobial agent FMDP (N3‐(4‐methoxyfumaroyl)‐(S)‐2,3‐diamino‐propanoic acid) were synthesized. The obtained compounds were tested for the antibacterial and antifungal activity. All novel dendrimers displayed much better activity against the tested strains than FMDP itself. Moreover, their conjugates with FMDP also exhibited antimicrobial activity. The most promising molecules were tested against a broad selection of fungal strains. The analysis of their antifungal properties indicates that the examined molecules are efficient growth inhibitors of fluconazole‐resistant hospital‐acquired strains. Moreover, an application of amphiphilic branched peptides such as FMDP carriers suggests that transport mechanism involves more likely the cell membrane perturbation than the mediation of the specific transport proteins. The activity of obtained compounds strongly depends on the specific structure of the molecule.

  • Perceptual and Motor Effects of Muscle Co-activation in a Force Production Task
    • Cristian Cuadra
    • Wiktoria Wojnicz
    • Mark Latash
    • Ziga Kozinc
    2020 NEUROSCIENCE

    We tested several predictions of the theory of motor control with spatial referent coordinates related to effects of muscle coactivation on force production and perception. In particular, we predicted that subjects would produce unintentional force increase by finger flexors and be unaware of this force increase. Healthy subjects performed steady force production task in isometric conditions with visual feedback on the force level. They coactivated muscles of the arm trying to keep the force constant in the absence of visual feedback. This led to a consistent force increase not perceived by the subjects as reflected by their verbal reports. In contrast, when asked to match the force with the contralateral hand, adequate force matching was observed. Using the ‘‘inverse piano” apparatus confirmed no change in the referent coordinate of the fingers and an increase in its apparent stiffness. The results confirm the earlier hypothesis on the reciprocal command being hierarchically higher than the coactivation command. The observations suggest that verbal reports and force matching use different neural mechanisms of force perception; the former are dominated by sense of effort, which reflects primarily the magnitude of the reciprocal command. There were only minor differences between the dominant and non-dominant hands, likely reflecting the faster unintentional drifts of control variables in the dominant hand.

  • Performance Analysis of Convolutional Neural Networks on Embedded Systems
    • Łukasz Grzymkowski
    • Tomasz Stefański
    2020

    Machine learning is no longer confined to cloud and high-end server systems and has been successfully deployed on devices that are part of Internet of Things. This paper presents the analysis of performance of convolutional neural networks deployed on an ARM microcontroller. Inference time is measured for different core frequencies, with and without DSP instructions and disabled access to cache. Networks use both real-valued and complex-valued tensors and are tested using different inference engines. We conclude that the system must be tuned in a holistic way to achieve optimal efficiency.

  • Performance of isotropic constitutive laws in simulating failure mechanisms in scaled RC beams
    • Ireneusz Marzec
    • Jerzy Bobiński
    2020 Pełny tekst ARCHIVES OF MECHANICS

    Results of numerical calculations of reinforced concrete (RC) beams are presented. Based on experimental results on longitudinally reinforced specimens of different sizes and shapes are investigated. Four different continuum constitutive laws with isotropic softening are used: one defined within continuum damage mechanics, an elasto-plastic with the Rankine criterion in tension and the Drucker-Prager criterion in compression, a formulation coupling elasto-plasticity and damage mechanics and the concrete damaged plasticity (CDP) model implemented in Abaqus. In a softening regime, a non-local theory of integral format is applied to the first three constitutive laws. A fracture energy approach is utilised in CDP model. An ability to reproduce different failure mechanisms observed in experiments for each constitutive model is analysed. A comparison of force-displacement curves and crack patterns between numerical and experimental outcomes is performed.

  • Performance of organic coatings upon cyclic mechanical load
    • Michał Szociński
    • Kazimierz Darowicki
    2020 Pełny tekst PROGRESS IN ORGANIC COATINGS

    A number of engineering structures fail due to the fatigue damage resulting from cyclic mechanical stress. However, as far as organic coatings are concerned this degradation factor remains underestimated. In the paper the authors propose a methodology combining global electrochemical impedance spectroscopy and local atomic force microscopy measurements for evaluation of coating resistance to an impact of repetitive mechanical stress. Typical epoxy coating designated for ship hull protection has been tested in as-received state as well as after preexposure to elevated temperature. Application of atomic force microscopy-based approach helped to reveal and spatially localize the spots of organic coating degradation onset. The mechanism and process of defect formation and propagation has been shown on a microscopic scale.

  • Performance-Driven Surrogate Modeling of High-Frequency Structures
    • Sławomir Kozieł
    • Anna Pietrenko-Dąbrowska
    2020

    The development of modern high-frequency structures, including microwave and antenna components, heavily relies on full-wave electromagnetic (EM) simulation models. Notwithstanding, EM-driven design entails considerable computational expenses. This is especially troublesome when solving tasks that require massive EM analyzes, parametric optimization and uncertainty quantification be-ing representative examples. The employment of fast replacement models, also referred to as surrogates, has been fostered as a way of mitigating these issues. Unfortunately, conventional modeling meth-ods are of limited applicability for handling nonlinear outputs of high-frequency devices. The reason is the curse of dimensionality but also a fundamental requirement that design-ready surrogates are to cover wide ranges of the system parameters and its operating con-ditions. This book offers a different methodological perspective on modeling of high-frequency structures, specifically, the concept and implementation of constrained or performance-driven surrogates. The presented approach addresses the issues of dimensionality and parameter ranges through appropriate confinement of the model do-main, focused on the regions that are promising from the point of view of the relevant design objectives. The performance-driven par-adigm enables the construction of reliable surrogates at a fraction of cost required by conventional methods, and to accomplish the mod-eling tasks where other techniques routinely fail. The book provides a broad selection of specific frameworks, extensively illustrated us-ing examples of real-world microwave and antenna structures. Ap-plications, including parametric optimization and multi-objective de-sign, are also discussed, along with the exposition of inverse model-ing methods. Furthermore, the book contains introductory material on data-driven and physics-based surrogates. Practical aspects of high-frequency surrogate modeling and recommendations concern-ing particular techniques are discussed as well.

  • Performance/energy aware optimization of parallel applications on GPUs under power capping
    • Adam Krzywaniak
    • Paweł Czarnul
    2020 Pełny tekst

    In the paper we present an approach and results from application of the modern power capping mechanism available for NVIDIA GPUs to the bench- marks such as NAS Parallel Benchmarks BT, SP and LU as well as cublasgemm- benchmark which are widely used for assessment of high performance computing systems’ performance. Specifically, depending on the benchmarks, various power cap configurations are best for desired trade-off of performance and energy con- sumption. We present two: both energy savings and performance drops for same power caps as well as a normalized performance-energy consumption product. It is important that optimal configurations are often non-trivial i.e. are obtained for power caps smaller than default and larger than minimal allowed limits. Tests have been performed for two modern GPUs of Pascal and Turing generations i.e. NVIDIA GTX 1070 and NVIDIA RTX 2080 respectively and thus results can be useful for many applications with profiles similar to the benchmarks executed on modern GPU based systems.

  • Person Tracking in Ultra-Wide Band Hybrid Localization System Using Reduced Number of Reference Nodes
    • Piotr Rajchowski
    • Jacek Stefański
    • Jarosław Sadowski
    • Krzysztof Cwalina
    2020 Pełny tekst SENSORS

    In this article a novel method of positional data integration in an indoor hybrid localization system combining inertial navigation with radio distance measurements is presented. A point of interest is the situation when the positional data and the radio distance measurements are obtained from less than thee reference nodes and it is impossible to unambiguously localize the moving person due to undetermined set of positional equations. The presented method allows to continuously provide localization service even in areas with disturbed propagation of the radio signals. Authors performed simulation and measurement studies of the proposed method to verify the precision of position estimation of a moving person in an indoor environment. It is worth noting that to determine the simulation parameters and realize the experimental studies the hybrid localization system demonstrator was developed, combining inertial navigation and radio distance measurements. In the proposed solution, results of distance measurements taken to less than three reference nodes are used to compensate the drift of the position estimated using the inertial sensor. In the obtained simulation and experimental results it was possible to reduce the localization error by nearly 50% regarding the case when only inertial navigation was used, additionally keeping the long term root mean square error at the level of ca. 0.50 m. That gives a degradation of localization precision below 0.1 m with respect to the fusion Kalman filtration when four reference nodes are present.

  • Perspektywa jakości w szkolnictwie wyższym. O modelu QualHE
    • Piotr Grudowski
    2020

    Kategoria jakości w szkolnictwie wyższym, choć tak ważna dla zapewnienia oczekiwanego tempa rozwoju państw i społeczeństw, ciągle jeszcze nie znajduje odpowiadającego jej randze odzwierciedlenia w pracach przedstawiających tę problematykę w sposób holistyczny, w odniesieniu do stale zmieniających się możliwości i wyzwań. Oddawana do rąk Czytelników monografia wnosi wkład w wypełnianie wspomnianej luki, przede wszystkim poprzez: • przedstawienie szerokiego kontekstu ogólnoświatowego dyskursu dotyczącego kategorii jakości w szkolnictwie wyższym w ujęciu teoriopoznawczym i w wynikach badań empirycznych; • określenie potencjału i uwarunkowań aplikacyjnych dotyczących takich koncepcji jak TQM Lean Management, Six Sigma czy Lean Six Sigma; • przedstawienie aktualnych trendów w zarządzaniu usługami publicznymi jako zbioru impulsów do zmian oraz tła dla projakościowej transformacji uczelni; • wskazanie możliwości wykorzystania opracowanych przez ISO najnowszych normatywnych systemów zarządzania; • zaakcentowanie roli kultury jakości jako elementu determinującego powodzenie wszelkich inicjatyw związanych z doskonaleniem procesów uczelni; • przedstawienie wyników kompleksowych badań interesariuszy polskiego systemu szkolnictwa wyższego na temat całokształtu projakościowych regulacji i zmian w uczelniach; • odniesienie perspektyw i wyzwań dotyczących zmian w szkolnictwie wyższym do koncepcji Przemysłu 4.0 i Jakości 4.0. Zaproponowany w książce oryginalny model systemu zarządzania jakością na uczelni – QualHE – odnosi się do wymienionych elementów, pokazując ich wzajemne relacje i dynamiczny charakter. Książka jest adresowana do badaczy zainteresowanych funkcjonowaniem systemów szkolnictwa wyższego, uczelni i poszczególnych jednostek organizacyjnych oraz kierunkami ich modernizacji. Powinna też spotkać się z zainteresowaniem praktyków – przedstawicieli kadry kierowniczej oraz pracowników działów jakości, coraz powszechniej tworzonych w strukturach uczelni. Może także stanowić kompendium wiedzy i inspirację do identyfikacji działań związanych z doskonaleniem organizacji dla osób reprezentujących różne grupy interesariuszy szkół wyższych, np. studentów, absolwentów, pracowników uczelni czy pracodawców.

  • Phage therapy as a novel strategy in the treatment of urinary tract infections caused by E. coli
    • Beata Zalewska-Piątek
    • Rafał Piątek
    2020 Pełny tekst Antibiotics-Basel

    Urinary tract infections (UTIs) are regarded as one of the most common bacterial infections affecting millions of people, in all age groups, annually in the world. The major causative agent of complicated and uncomplicated UTIs are uropathogenic E. coli strains (UPECs). Huge problems with infections of this type are their chronicity and periodic recurrences. Other disadvantages that are associated with UTIs are accompanying complications and high costs of health care, systematically increasing resistance of uropathogens to routinely used antibiotics, as well as biofilm formation by them. This creates the need to develop new approaches for the prevention and treatment of UTIs, among which phage therapy has a dominant potential to eliminate uropathogens within urinary tract. Due to the growing interest in such therapy in the last decade, the bacteriophages (natural, genetically modified, engineered, or combined with antibiotics or disinfectants) represent an innovative antimicrobial alternative and a strategy for managing the resistance of uropathogenic microorganisms and controlling UTIs.

  • Phenolic compounds from Nerium oleander leaves: microwave assisted extraction, characterization, antiproliferative and cytotoxic activities
    • Siham Ayouaz
    • Sheila Cristina Oliveira-Alves
    • Khalef Lefsih
    • Ana Teresa Serra
    • Andreia Bento da Silva
    • Madani Samah
    • Jakub Karczewski
    • Khodir Madani
    • Maria Rosário Bronze
    2020 Food & Function

    A microwave-assisted extraction (MAE) method was used for the extraction of phenolic compounds from Nerium oleander leaves. The influence of variables such as ethanol concentration, microwave power, irradiation time and liquid/solid ratio on polyphenol extraction was modelled using a second-order regression equation based on response surface methodology (RSM). The optimal conditions for MAE were: extraction solvent 35% ethanol concentration, 500 W microwave power, 60 s irradiation time and a solvent/material ratio of 20 mL g−1. Under optimal MAE conditions, the recovery of TPC was 25.752 mg GAE per g dw. 19 compounds have been identified by HPLC-ESI-MS/MS analysis; the main compounds identified were chlorogenic acid, rutin and quinic acid esters, such as caffeoylquinic acids and dicaffeoylquinic acids. Additionally, the optimized extract demonstrated potential to inhibit HT29 colorectal cancer cell growth (EC50 = 2.432 μg mL−1) without presenting cytotoxicity in confluent Caco-2 cells, a model of human intestinal epithelium. These results supply new information about the phenolic composition of Nerium oleander leaves and their antiproliferative effect.

  • Photochemical Rearrangement of a 19-Membered Azoxybenzocrown: Products and their Properties
    • Ewa Wagner-Wysiecka
    • Paulina Szulc
    • Elżbieta Luboch
    • Jarosław Chojnacki
    • Katarzyna Szwarc-Karabyka
    • Natalia Łukasik
    • Miłosz Murawski
    • Michał Kosno
    2020 Pełny tekst ChemPlusChem

    The preparation and characterization of products of the chemical and photochemical rearrangements of a 19-membered o,o'-azoxybenzocrown were presented. In photochemical rearrangement, besides expected product i.e. 19-membered o-hydroxy-o,o'-azobenzocrown (19-o-OH), obtained under defined conditions with 75% yield, also other macrocyclic products were isolated and identified, namely: 19-membered p-hydroxy-o,o'-azobenzocrown (19-p-OH), 21-membered o'-hydroxy-o,p'-azobenzocrown (21-o'-OH) and 19-membered macrocycle containing 5-membered ring bearing an aldehyde group (19-al). The structures of two atypical products of the photochemical rearrangement - 21-o'-OH and 19-al - were determined in the solid state by the X-ray method and in solution using NMR spectroscopy. Tautomeric equilibrium of the formed hydroxyazobenzocrowns and its change depending on acidity/basicity of the environment and alkali and alkaline earth metal cations complexation were studied using UV-Vis spectrophotometry, spectrofluorimetry and 1H NMR spectroscopy.

  • Photoinduced K+ Intercalation into MoO3/FTO Photoanode—the Impact on the Photoelectrochemical Performance
    • Mariusz Szkoda
    • Konrad Trzciński
    • Marcin Stanisław Łapiński
    • Anna Lisowska-Oleksiak
    2020 Pełny tekst Electrocatalysis

    In this work, thin layers of MoO3 were tested as potential photoanodes for water splitting. The influence of photointercalation of alkali metal cation (K+) into the MoO3 structure on the photoelectrochemical properties of the molybdenum trioxide films was investigated for the first time. MoO3 thin films were synthesized via thermal annealing of thin, metallic Mo films deposited onto the FTO substrate using a magnetron sputtering system. The Tauc and Mott–Schottky plots analysis were performed in order to determine the energy bands position of the investigated material. The photointercalation effect of K+ on photoelectrochemical properties of FTO/MoO3 photoanodes was studied using electrochemical techniques performed under simulated solar light illumination. It was proven that pristine MoO3 layers cannot act as effective photoanodes for water splitting due to the utilization of the photoexcited electrons in the intercalation process. The photochromic phenomenon related to Mo6+ centers reduction, and K+ intercalation occurs at a potential range in which the photoanode exhibits photoelectrochemical activity towards water photooxidation.

  • Photoplethysmographic Time-Domain Heart Rate Measurement Algorithm for Resource-Constrained Wearable Devices and its Implementation
    • Marek Wójcikowski
    • Bogdan Pankiewicz
    2020 Pełny tekst SENSORS

    This paper presents an algorithm for the measurement of the human heart rate, using photoplethysmography (PPG), i.e., the detection of the light at the skin surface. The signal from the PPG sensor is processed in time-domain; the peaks in the preprocessed and conditioned PPG waveform are detected by using a peak detection algorithm to find the heart rate in real time. Apart from the PPG sensor, the accelerometer is also used to detect body movement and to indicate the moments in time, for which the PPG waveform can be unreliable. This paper describes in detail the signal conditioning path and the modified algorithm, and it also gives an example of implementation in a resource-constrained wrist-wearable device. The algorithm was evaluated by using the publicly available PPG-DaLia dataset containing samples collected during real-life activities with a PPG sensor and accelerometer and with an ECG signal as ground truth. The quality of the results is comparable to the other algorithms from the literature, while the required hardware resources are lower, which can be significant for wearable applications.

  • Photoresponsive, amide-based derivative of embonic acid for anion recognition
    • Natalia Łukasik
    • Jarosław Chojnacki
    • Elżbieta Luboch
    • Andrzej Okuniewski
    • Ewa Wagner-Wysiecka
    2020 Pełny tekst JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY

    The synthesis and ion-binding properties of amide-based derivative of embonic acid andp-aminoazobenzenewere described. The new compound was characterized by X-ray structural analysis and spectroscopic methods.Ligand interacts in acetonitrile with Y-shaped anions (benzoates and acetates) and dihydrogen phosphatesforming complexes of 1:1 stoichiometry. In more polar DMSO the complexes stoichiometry changes to 2:1(L:anion). Light-inducedtranstocisisomerization was studied. The effect of anions on thermal back iso-merization was investigated.

  • Photosensitive and pH-dependent activity of pyrazine-functionalized carbazole derivative as promising antifungal and imaging agent
    • Agnieszka Chylewska
    • Aleksandra Dąbrowska
    • Sandra Ramotowska
    • Natalia Maciejewska
    • Mateusz Olszewski
    • Maciej Bagiński
    • Mariusz Makowski
    2020 Pełny tekst Scientific Reports

    Carbazole skeleton plays a significant role as a structural scaffold of many pharmacologically active compounds. Pyrazine-functionalized carbazole derivative was constructed by coupling 2-amino-5-bromo-3-methylaminepyrazine (ABMAP) into 3 and 6 positions of the carbazole ring. Multi-experimental methods were used, e.g., potentiometric, spectroscopic (ATR, UV, XRD powder,1H and13C NMR), electrochemical (cyclic voltammetry), and optical techniques, to receive the complete structural analysis, physicochemical (pKa, logP) and biological profile of a new carbazole derivative with acronym 3,6-PIRAMICAR. The interaction ability of the compound studied with potential cellular targets like Calf Thymus DNA (CT-DNA), or Bovine Serum Albumin (BSA) were also taken into account. Experiments showed the existence of strong binding, but no DNA or BSA cleavage was observed. The comparative analyzes of compounds anti-Candida action clearly show pH-dependent antifungal activity of 3,6-PIRAMICAR, which was strongly stimulated in the acidic media. Surprisingly, the titled compound turn out to be much more effective (14 times by MIC50; 8 times by MIC; c.a. 4 times by MFC) against Candida krusei than fluconazole at pH 4.

  • Physicochemical and Mechanical Performance of Freestanding Boron-Doped Diamond Nanosheets Coated with C:H:N:O Plasma Polymer
    • Michał Rycewicz
    • Łukasz Macewicz
    • Jiri Kratochvil
    • Alicja Stanisławska
    • Mateusz Ficek
    • Mirosław Sawczak
    • Vitezslav Stranak
    • Marek Szkodo
    • Robert Bogdanowicz
    2020 Pełny tekst Materials

    The physicochemical and mechanical properties of thin and freestanding heavy boron-doped diamond (BDD) nanosheets coated with a thin C:H:N:O plasma polymer were studied. First, diamond nanosheets were grown and doped with boron on a Ta substrate using the microwave plasma-enhanced chemical vapor deposition technique (MPECVD). Next, the BDD/Ta samples were covered with nylon 6.6 to improve their stability in harsh environments and flexibility during elastic deformations. Plasma polymer films with a thickness of the 500–1000 nm were obtained by magnetron sputtering of a bulk target of nylon 6.6. Hydrophilic nitrogen-rich C:H:N:O was prepared by the sputtering of nylon 6.6. C:H:N:O as a film with high surface energy improves adhesion in ambient conditions. The nylon–diamond interface was perfectly formed, and hence, the adhesion behavior could be attributed to the dissipation of viscoelastic energy originating from irreversible energy loss in soft polymer structure. Diamond surface heterogeneities have been shown to pin the contact edge, indicating that the retraction process causes instantaneous fluctuations on the surface in specified microscale regions. The observed Raman bands at 390, 275, and 220 cm−1 were weak; therefore, the obtained films exhibited a low level of nylon 6 polymerization and short-distance arrangement, indicating crystal symmetry and interchain interactions. The mechanical properties of the nylon-on-diamond were determined by a nanoindentation test in multiload mode. Increasing the maximum load during the nanoindentation test resulted in a decreased hardness of the fabricated structure. The integration of freestanding diamond nanosheets will make it possible to design flexible chemical multielectrode sensors.

  • Phytoremediation—From Environment Cleaning to Energy Generation—Current Status and Future Perspectives
    • Anna Grzegórska
    • Piotr Rybarczyk
    • Andrzej Rogala
    • Dawid Zabrocki
    2020 Pełny tekst ENERGIES

    :Phytoremediationis a technology based on the use of green plants to remove, relocate, deactivate, or destroy harmful environmental pollutants such as heavy metals, radionuclides, hydrocarbons, and pharmaceuticals. Under the general term of phytoremediation, several processes with distinctively different mechanisms of action are hidden. In this paper, the most popular modes of phytoremediation are described and discussed. A broad but concise review of available literature research with respect to the dominant process mechanism is provided. Moreover, methods of plant biomass utilization after harvesting, with particular regard to possibilities of “bio-ore” processing for metal recovery, or using energy crops as a valuable source for bio-energy production (bio-gas, bio-ethanol, bio-oil) are analyzed. Additionally, obstacles hindering the commercialization of phytoremediation are presented and discussed together with an indication of future research trends.

  • Pierwsze laboratoria wysokich napięć na ziemiach polskich
    • Krystian Chrzan
    • Marek Olesz
    • Stanisław Wojtas
    2020 Pełny tekst Przegląd Elektrotechniczny

    W publikacji przedstawiono pierwsze laboratoria wysokich napięć w Gdańsku, Wrocławiu, Lwowie, Warszawie, Gródku oraz osoby, które przyczyniły się do ich powstania. Alfons Hoffmann na Pomorzu, Ignacy Mościcki i Stanisław Jasilkowski we Lwowie i Kazimierz Drewnowski w Warszawie należą do pionierów i propagatorów techniki wysokich napięć w Polsce. Podczas budowy na początku ubiegłego stulecia nowoczesnych laboratoriów wykorzystywali nowatorskie pomysły oraz produkty wiodących firm, m in. fabryki transformatorów Siemens-Schuckert.

  • Plan zarządzania danymi–jak skutecznie współpracować z naukowcami? Doświadczenia Centrum Kompetencji Otwartej Nauki przy Bibliotece Politechniki Gdańskiej
    • Piotr Krajewski
    • Magdalena Szuflita-Żurawska
    2020 Pełny tekst Biuletyn EBIB

    Każdy projekt naukowy wiąże się z gromadzeniem i przetwarzaniem danych badawczych. Zaplanowanie całego procesu zarządzaniaoraz udostępniania danych stanowi obecnie nie tylko dobryzwyczaj, ale i konieczność. Od 2019 r. wszystkie wnioski składane w konkursach o granty Narodowego Centrum Nauki (NCN) muszą zawierać plan zarzą-dzania danymi z najważniejszymi informacjami dotyczącymi miejsca przechowywania danych, jak będą one opisywane igdzie udostępniane. Przygotowanie takiego planu może niejednokrotnie stanowić wyzwaniedla naukowców, zwłaszcza waspekcie praw własności intelektualnej czy też odpowiedniego zabezpieczenia danych. Artykuł przedstawia działania Centrum Kompetencji Otwartej Nauki działającego przy Bibliotece Politechniki Gdańskiej,podjęte w celu wsparcia naukowców w tym zadaniu. Działalność pracowników centrum przebiega dwutorowo: z jednej strony prowadzone są szkolenia, na których naukowcy mogą zapoznać się z najważniejszymi elementami procesu zarządzania danymi, z drugiej strony wszystkie plany przygotowane przez naukowców Politechniki Gdańskiej są konsultowane oraz weryfikowane. Ponadto na zaproszenie NCN pracownicy Centrum Kompetencji przeprowadzili szkolenia dla bibliotekarzy oraz pracowników administracji z innych uczelni, którzy dzięki zdobytej wiedzy mogą teraz wspierać naukowców w swoich macierzystych instytucjach.

  • Planty, promenady, ringi. Śródmiejskie założenia pierścieniowe Gdańska, Poznania, Wrocławia i Krakowa
    • Łukasz Bugalski
    2020

    [notka wydawnicza] Okalają centra miast, określają ich strukturę urbanistyczną i wpływają na codzienne życie mieszkańców. Planty, promenady i ringi – które autor nazywa ogólnie założeniami pierścieniowymi – są charakterystyczne dla wielu polskich miast. Powstały w miejscu dawnej granicy miasta – średniowiecznych murów lub nowożytnych bastionów ziemnych. Dziś stanowią atrakcyjną przestrzeń publiczną wypełnioną alejami, bulwarami i parkami bądź jej przeciwieństwo: jednorodny obszar zdominowany przez arterie komunikacyjne. Łukasz Bugalski definiuje, czym są założenia pierścieniowe, i zarysowuje szeroki kontekst ich powstawania – zarówno historyczny, jak i teoretyczny. Książkę wieńczy analiza czterech przypadków obrazujących zróżnicowany charakter założeń pierścieniowych: Gdańska, Poznania, Wrocławia i Krakowa.

  • Plasticity of Bead-On-Plate Welds Made with the Use of Stored Flux-Cored Wires for Offshore Applications
    • Aleksandra Świerczyńska
    • Michał Landowski
    2020 Pełny tekst Materials

    Extreme atmospheric conditions in the marine and offshore industry are harmful to engineering materials, especially to welded joints, and may cause degradation of their properties. This article presents the results of research on the plasticity of bead-on-plate welds made using two types of seamless, copper plated flux-cored wires. Before welding, spools with wire were stored for 1 month in two distinct locations with different geographical and industrial conditions in Poland, and then subjected to visual examination. Bead-on-plate welds were subjected to a static tensile test and on this basis plasticity indexes showing the effect of storage on plasticity were determined. The fractures after tensile tests and the surfaces of the wires were examined on an electron scanning microscope. Additionally, diffusible hydrogen content in deposited metal measurements for each condition were carried out. The highest degradation level was found for wire stored in an agricultural building in north-eastern Poland—there was an almost fourfold decrease in the plasticity index value and the highest diffusible hydrogen content. For the same wire and the same location, the largest difference was also observed in fracture morphology after the tensile test—ductile fracture was obtained for wire at delivery condition while an almost full cleavage fracture was found after relatively short (1 month) storage of wire.

  • Playing the Sprint Retrospective: A Replication Study
    • Yen Ying Ng
    • Jędrzej Skrodzki
    • Maciej Wawryk
    2020

    The Sprint Retrospective is a vehicle for continuous process improvement. Even though it is a well established agile practice, running effective retrospective meetings is challenging. There have been a lot of identified problems that commonly occur during these meetings. To address them, Przybyłek & Kotecka [20] successfully revitalized retrospective meetings by adopting collaborative games, which represent a powerful tool in improving interactions among team members. In this paper, we report on a replication of their study in Bluebay Poland and IHS Markit Gdańsk. The received feedback confirms the original findings and indicates that game-based retrospectives improve team members’ creativity, involvement, and communication as well as produce better results than the standard retrospectives. This paper is an extended version of our previous work [25].

  • Płynne przestrajanie pasma filtru ułamkowoopóźniającego z wykorzystaniem funkcji sklejanych
    • Marek Blok
    2020 Pełny tekst Przegląd Telekomunikacyjny + Wiadomości Telekomunikacyjne

    Przedstawiona metoda projektowania filtrów ułamkowoopóźniających definiowanych w dziedzinie częstotliwości umożliwia, poza określeniem jego opóźnienia, swobodne sterowanie szerokością pasma. Przestrajanie pasma filtru jest tu realizowane z użyciem funkcji sklejanych trzeciego stopnia, interpolujących współczynniki definiujące charakterystykę częstotliwościową. Zaproponowane rozwiązanie odpowiada użyciu metody okien przesuwanych, stąd użycie tych filtrów pozwala na sterowanie chwilową szerokością pasma w algorytmie zmiany szybkości próbkowania.

  • Początki i rozwój Katedry Automatyki na Wydziale Elektrycznym Politechniki Gdańskiej
    • Franciszek Milkiewicz
    • Kazimierz Kosmowski
    • Marcin Śliwiński
    2020 Pełny tekst Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej

    Niniejszy artykuł obejmuje historię powstawania i rozwoju Katedry Automatyki na Wydziale Elektrotechniki i Automatyki Politechniki Gdańskiej oraz związanego z tym powstawania i rozwoju na Wydziale kierunku studiów automatyka i robotyka. W kształceniu studentów tego kierunku studiów uczestniczyły także i inne katedry Wydziału. Zajęcia dydaktyczne z zastosowań automatyki prowadzili również pracownicy: Katedry Miernictwa Elektrycznego, Katedry Trakcji Elektrycznej, Katedry Maszyn Elektrycznych, Katedry Napędów Elektrycznych, Katedry Energoelektroniki i Maszyn Elektrycznych, Katedry Systemów Elektroenergetycznych. Oczywiście, w kształceniu studentów brały też udział katedry przekazujące studentom wiedzę ogólną oraz podstawową wiedzę techniczną.

  • Podstawowe procedury pomiarowe w ochronie katodowej
    • Kazimierz Darowicki
    • Krzysztof Żakowski
    2020

    Opracowanie zawiera opis podstawowych procedur pomiarowych stosowanych przez personel ochrony katodowej w sektorze lądowych konstrukcji metalowych. Znajomość opisanych metod jest wymagana od personelu na poziomie 1 oraz na poziomie 2 kompetencji zgodnie z wymogami normy PN-EN ISO 15257:2017-10: "Ochrona katodowa -- Poziomy kompetencji osób zajmujących się ochroną katodową -- Podstawa systemu certyfikacji". Opracowanie przeznaczone jest przede wszystkim dla personelu zajmującego się ochroną katodową podziemnych rurociągów stalowych. Opisane procedury pomiarowe mogą być jednak stosowane na dowolnej metalowej konstrukcji podziemnej.

  • Podstawy technologii selektywnego spiekania laserowego proszków polimerowych – SLS
    • Dawid Zieliński
    2020 Pełny tekst Tworzywa Sztuczne w Przemyśle

    W pracy zaprezentowano zbiór informacji oraz praktycznych wskazówek związanych z drukowaniem elementów metodą selektywnego spiekania laserowego proszków polimerowych – SLS. Zawarte treści dotyczą omówienia zasady działania, charakterystyki poszczególnych czynników procesu oraz powszechnie stosowanych materiałów. Przedstawiono ponadto najważniejsze korzyści i ograniczenia związane z wykorzystaniem metody SLS.

  • Poland's economic relations with Kazakhstan
    • Krystyna Gomółka
    2020 Pełny tekst Studia Wschodnioeuropejskie

    Before 2019, economic relations between Poland and Kazakhstan were regulated by 22 international agreements. Poland has been trading with Kazakhstan since the 1990s. Overall, Kazakhstan had a positive trade balance with Poland, with the exception of the 1996–1998 and 2006–2007 periods. Polish foreign investment in Kazakhstan was not very impressive; the first investments started only in 2005. In 2019, about 200 companies with Polish capital were registered in Kazakhstan, but only 100 of them started their own business. In 2005-2019, eight meetings of the Polish-Kazakh Intergovernmental Commission for Economic Cooperation were held. Their participants discussed investment projects, trade development strategies and proposals for regional cooperation.

  • Polarimetric studies of L-arginine-doped potassium dihydrogen phosphate single crystals
    • Mykola Shopa
    • Yaroslav Shopa
    • Michael Shribak
    • I. Pritula
    • E. Kostenyukova
    • O. Bezkrovnaya
    2020 Pełny tekst Journal of Applied Crystallography

    Conoscopic interference patterns, channelled spectra and polarimetric techniques have been used for the characterization of pure and doped (with L-arginine amino acid) potassium dihydrogen phosphate (KDP) single crystals. Experimental polarimetric data have been obtained for the frequently used wavelength of 633 nm and for two close wavelengths of 532 and 543 nm in a high-accuracy dual-wavelength polarimeter. The measurement of eigenwave ellipticity in the [100] and [010] directions and between 295 and 340 K shows small differences in the absolute values of the specific optical rotations of KDP crystals doped with L-arginine in the range of 0.7–3.8 wt%. It is found that the gyration tensor component g11, specific optical rotation and eigenwave ellipticity show different dispersion in the visible spectral region.

  • Polish Academic Libraries in the Face of the Covid-19 Pandemic: Crisis Management and Communication within the Organisation
    • Anna Wałek
    2020 Pełny tekst Przegląd Biblioteczny

    The developing SARS-CoV-2 coronavirus pandemic, which was announced in March 2020, has had a significant impact on the activities of universities and their academic libraries. The article aims to present the activities of academic libraries at the time of introducing restrictions on their activities and closing for several months to users and reformulating the services they provide, on the example of the Library of the Gdańsk University of Technology. First of all, attention was paid to how the principles of crisis and problem management were introduced at universities. It was also essential to examine how the changes and management decisions were perceived by the library employees who worked according to the new rules in the indicated period. The article is based on the analysis of available scientific publications in Polish on crisis management, especially in the era of epidemiological threats. Legal acts and regulations dealing with both crisis management in general and issued in connection with the announcement of the SARS-CoV2 pandemic were also taken into account. The method of survey research based on a questionnaire was also used. Since the survey was addressed only to employees of one institution, it had a limited record. It aimed to collect the respondents’ opinions on the work of the GUT Library in the period from March 12 to May 24, 2020, when remote work in special conditions was in force. A sudden change in the work mode of the GUT Library itself and its employees, a change in tools and forms of services provided, the need to purchase appropriate equipment and personal protective equipment, the introduction of remote work and other factors became the subject of management decisions made during the emerging crisis. These decisions were in line with the applicable guidelines, both the laws and regulations issued at the national level, as well as the policies and recommendations regarding the functioning of libraries issued by various state institutions and the National Library (book quarantine). However, many of the decisions were individual due to the lack of guidelines and benchmarks on which to base. The reason was also the delayed emergence of procedures. A survey conducted among the employees of the Gdańsk University of Technology Library in May 2020, after the employees returned to stationary work, showed that the adopted solutions were well assessed.

  • Polish Polar Research: Green-and-White Paper under the aegis of the Polish Polar Consortium (PPC)
    • Robert Józef Bialik
    • Marek Ewertowski
    • Piotr Głowacki
    • Dariusz Gotlib
    • Agata Goździk
    • Mariusz Grabiec
    • Katarzyna Jankowska
    • Luks Bartłomiej
    • Michał Łuszczuk
    • Wojciech Majewski
    • Krzysztof Migała
    • Jerzy Nawrocki
    • Rajmund Przybylak
    • Krzysztof Pabis
    • Ireneusz Sobota
    • Mateusz Strzelecki
    • Waldemar Walczowski
    • Michał Węgrzyn
    • Marek Lewandowski
    • Żaneta Polkowska
    • Wiesław Ziaja
    2020

    Polar research is a colloquial term for cross-area, cross-domain and interdisciplinary research in the Arctic and Antarctic. Polar research is mainly the domain of natural sciences, but technical sciences and humanities also grow in importance. Being vulnerable to climate change, polar regions are commonly considered as a kind of litmus paper of changes in geosystems, hence the importance of research done there. It aims at a better understanding of the processes taking place in the polar environment and the search for links between the bio-, litho-, atmo- and hydrosphere on the one hand, and the anthroposphere on the other, which would provide a better knowledge on the genesis of the present glaciation and then a reliable forecast of future global changes. The document is composed of three main parts. The “Introduction” and presentation of the legal and organizational framework is followed by Part I, describing the potential of the polar scientific community in Poland along with the infrastructure and logistical means (on land and sea). Part II presents the research topics implemented in Polish scientific entities. In Part III we outline the future of polar research in Poland, trying to specify the most important directions, feasible with a view to the existing research potential. At the end of the document, the achievements of polar community are displayed collectively in the form of a bibliography of over 800 scientific publications through the years 2007–2018, covered by the Journal Citation Reports. Keeping in mind that it is an output of about 300 scientists managing just two active polar stations (in the Arctic and Antarctic) and operating two small (though brave) research vessels, this is a respectable achievement. Worth emphasizing is also an additional yet not minor aspect of our polar activities, namely, the daily effort put into organization, logistics and maintenance of the material research base in the extreme natural environment. To sum up, the general message of this document is a strong argument for promoting polar research in Poland, because the ratio of expenditures to cognitive and social effects seems to be very attractive from the point of view of the Polish Polar Policy and general scientific policy of the country

  • Polish waterfront in the process of transformation: The case of Elbląg port city
    • Justyna Breś
    2020 Pełny tekst PORTUSPlus

    The topic of waterfront transformation is a vast and challenging issue, which in small and medium-sized cities is still unexplored. With growing global interest in the matter of regeneration of city-water relationship and increasing public awareness of the value of waterfront public spaces, actions to transform abandoned waterfront areas have been undertaken in many Polish port cities. City of Elbląg, located in northern Poland, is an interesting example in which historic waterfront is undergoing process of transformation. The article presents the case of waterfront transformation in this medium-sized city, focusing on historic part of the waterfront, which has been significantly destroyed during World War. The article analyses the land use of the waterfront area, the usage of the wharf, the level of access to the water and municipal policy towards waterfront development in order to better understand the current state of waterfront area and water-land relation, to identify its weak points and to indicate possible future directions for its development. The research reveals a significant disproportion in development of eastern and western riverside, underdevelopment of large part of waterfront area and lack of coherent, comprehensive municipal strategy towards waterfront along the river. This lack of planning is not conducive to strengthening the water-land relationship. The article identifies key opportunities and threats for central waterfront and general directions for sustainable development of the city.

  • Politics and urban artifacts in cities: what are they and how are they interconected?
    • Saira Abbasi
    • Justyna Martyniuk-Pęczek
    2020 Pełny tekst Przestrzeń Ekonomia Społeczeństwo

    This research, analyses the effect of politics on a city and its image, via their control over the formation or changes on urban artifacts. It analyses the concepts introduced in Aldo Rossi’s architectural monograph, The Architecture of the City, in the chapter titled ‘Politics as Choice’, and his idea that a city’s image is a reflection of its political institutions and the choices people in authority make. Monuments and architecture of various cities world over are taken into consideration, and in the authors opinion it becomes evident that over the ages, irrespective of the location, architecture and urban planning are used as tools in achieving or furthering political goals and agendas. These choices made by people in authoritative positions can have long lasting effects on the shape, identity or image of the city. Qualitative analysis based on review of existing literature and urban plans has been done, along with semi-directed interview with experts in the urban history of Rome, Bilbao and Sydney. This approach was adopted as the study analyses concepts which are more analytical and a qualitative methodology is more appropriate for use. Lastly, this study is preliminary research in better understanding the urban artifacts of the 20th century and researches one of the factors that influence their formation, that is politics. Other aspects of socio-economic, historical and cultural factors will be researched in future studies.

  • Poloxamer: A versatile tri-block copolymer for biomedical applications
    • Payam Zarrintaj
    • Joshua D. Ramsey
    • Ali Samadi
    • Zhaleh Atoufi
    • Mohsen Khodadadi Yazdi
    • Mohammad Ganjali
    • Leila Mohammadi Amirabad
    • Ehsan Zangene
    • Mehdi Farokhi
    • Krzysztof Formela
    • Mohammad Saeb
    • Masoud Mozafari
    • Thomas Sabu
    2020 Pełny tekst Acta Biomaterialia

    Poloxamers, also called Pluronic, belong to a unique class of synthetic tri-block copolymers containing central hydrophobic chains of poly(propylene oxide) sandwiched between two hydrophilic chains of poly(ethylene oxide). Some chemical characteristics of poloxamers such as temperature-dependent self-assembly and thermo-reversible behavior along with biocompatibility and physiochemical properties make poloxamer-based biomaterials promising candidates for biomedical application such as tissue engineering and drug delivery. The microstructure, bioactivity, and mechanical properties of poloxamers can be tailored to mimic the behavior of various types of tissues. Moreover, their amphiphilic nature and the potential to self-assemble into the micelles make them promising drug carriers with the ability to improve the drug availability to make cancer cells more vulnerable to drugs. Poloxamers are also used for the modification of hydrophobic tissue-engineered constructs. This article collects the recent advances in design and application of poloxamer-based biomaterials in tissue engineering, drug/gene delivery, theranostic devices, and bioinks for 3D printing.

  • Polski PR-owiec w świecie ponowoczesnym – wyniki badań i ich analiza. Poza dobrem i złem
    • Ewa Hope
    2020

    W artykule analizuję wyniki badania Profesjonalizm public relations w Polsce, przeprowadzonego na potrzeby budowanego dokumentu Standardy profesjonalnego public relations – prezentowanego w tej pracy. Stawiam również pytanie o przyczynę częstych odpowiedzi respondentów „czasami” czy „nie mam zdania” i wykazuję niespójność systemów wartości respondentów zestawiając ich odpowiedzi na poszczególne pytania. Stawiam tezę, że niespójności te – i brak jednoznacznych odpowiedzi - są efektem sposobu funkcjonowania instytucji w społeczeństwie płynnej ponowoczesności, gdzie adiaforyzacja działań – sytuowanie ich poza kategorią oceny dobro-zło jest powszechnym zabiegiem. W czasach interregnum – pomiędzy epokami - bardzo trudno jest w związku z tym budować standardy etyczne zachowań zawodowych – szczególnie tych zawodów, mających bezpośredni wpływ na kondycję społeczeństw – jak zawód specjalisty public relations. Jednocześnie mamy świadomość konieczności i wagi takiego dokumentu dla środowiska osób zajmujących się budowaniem relacji organizacji ze społeczeństwem, komunikacją i mamy też świadomość nieuchronnych zmian, jakie zajdą po okresie pandemii, a których pierwsze oznaki można już dostrzec.

  • Polski rynek telekomunikacyjny – uwarunkowania społeczno-gospodarcze
    • Józef Woźniak
    2020

    Zaprezentowano rolę i znaczenie telekomunikacji we współczesnym świecie, prezentując wybrane aspekty konwergencji systemowej i usługowej, mając na względzie potrzeby i oczekiwania użytkownika indy­widualnego, instytucjonalnego oraz biznesowego. Zaprezentowano, na podstawie dostępnych danych, stan aktualny i perspektywy rynku telekomunikacyjnego w Polsce. Przedstawiono wybrane inicjatywy podejmowane na rzecz rozwoju rynku telekomunikacyjnego i usług informatycznych. Zasygnalizowano perspektywy wdrażania 5G w Polsce. Uwagę zwrócono też na stan zaawansowania przetwarzania w chmurze, a także wielu inicjatyw odnoszących się do rozwoju zasobów obliczeniowych i infrastruktury teleinformatycznej. Słowa kluczowe: telekomunikacja i teleinformatyka, konwergencja i synergia, stan i perspektywy rozwoju rynku telekomunikacyjnego, wybrane inicjatywy rządowe, rozwój infrastruktury badawczej, sieć PUIONIER, usługi w chmurze, stan wdrażania 5G.

  • Polybrominated diphenyl ether (PBDE) concentrations in dust from various indoor environments in Gdańsk, Poland: Prediction of concentrations in indoor air and assessment of exposure of adults
    • Monika Śmiełowska
    • Bożena Zabiegała
    2020 SCIENCE OF THE TOTAL ENVIRONMENT

    Monitoring of polybrominated diphenyl ethers (PBDEs) in indoor environments involves the determination of their concentrations in air, airborne particles, and settled dust. Each of these is a source of human exposure to PBDEs. In this study, we attempted to model PBDEs concentrations in various typical indoor environments on the basis of real PBDEs measurements in dust collected from them. The analytical procedure for determining the contents of eight analytes in dust was based on the matrix solid-phase dispersion (MSPD) technique. Based on the results obtained, the concentrations of other components of commercial PBDEs blends in dust were estimated. The obtained model of PBDEs distribution between dust and air was used to estimate the exposure of adults to PBDEs in the studied indoor environments. For each tested environment, the dominant route of exposure was dust ingestion. For congeners with log Koa > 12, this was practically the only exposure pathway. A comparison between total PBDEs exposure and oral reference dose (RfD) values enabled an assessment of the risks arising from PBDEs exposure. In all of the studied indoor environments, no risk associated with exposure to PBDEs was noted. However, there is still the need for the extension of environmental PBDEs monitoring in Poland.