2020 - Repozytorium publikacji - Politechnika Gdańska

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Outsourcing w wybranych podmiotach leczniczych województwa pomorskiego.
- Mateusz Muchlado
2020
Celem badawczym, przyjętym w niniejszej pracy jest identyfikacja procesów zlecanych na zewnątrz w badanej populacji wraz z czynnikami warunkującymi ich skuteczność. Celem utylitarnym jest opracowanie narzędzia umożliwiającego dobór dostawców oraz ocenę procesów poddanych outsourcingowi. W rozdziale pierwszym pracy omówiono pojęcie outsourcingu oraz jego wykorzystanie w zarządzaniu procesami organizacji. Zidentyfikowano również czynniki wpływające na to, że organizacje decydują się na zlecanie procesów na zewnątrz. Przedstawiono również aktualne metody oceny skuteczności procesów. W rozdziale drugim przedstawiono charakterystykę podmiotu badań oraz wnioski z przeglądu literatury dotyczącej outsourcingu w podmiotach leczniczych w Polsce i za granicą. Zaprezentowano również i poddano krytycznej analizie istniejące już modele oceny skuteczności outsourcingu oraz odpowiednie uwarunkowania prawne i normatywne. W rozdziale trzecim opisano zastosowaną metodykę badań, w tym hipotezy sformułowane na podstawie studium literatury przedmiotu. Zawarto tu też wyniki badań ilościowych oraz jakościowych, które posłużyły do weryfikacji hipotez. Przedstawione zostały procesy zlecane na zewnątrz przez badane podmioty wraz z czynnikami warunkującymi skuteczność tych procesów. Przedstawiono również arkusz oceny dostawcy outsourcingowego, który jest wynikiem nawiązującym do celu utylitarnego niniejszej pracy. W podsumowaniu zawarto ujęte syntetycznie rezultaty przeprowadzonych badań, wnioski i rekomendacje oraz ograniczenia dotyczące wyników tej pracy.
Oversizing the photovoltaic generator capacity in a micro photovoltaic plant
- Zbigniew Lubośny
2020 Pełny tekst Acta Energetica
A significant part of photovoltaic micro installations in Poland is characterized by photovoltaic generator oversizing in relation to the inverter. The idea of oversizing, however, still raises doubts among some plant owners. In the paper, the energy yield of installation with an oversized and not oversized photovoltaic generator is presented on selected examples, showing the legitimacy of oversizing.
Overview of the three multicriteria approaches applied to a global assessment of analytical methods
- Paweł Mateusz Nowak
- Paweł Kościelniak
- Marek Tobiszewski
- Ana Ballester-Caudet
- Pilar Campíns-Falcó
2020 Pełny tekst TRAC-TRENDS IN ANALYTICAL CHEMISTRY
Critical and global evaluation of analytical methods should be one of the primary goals in analytical chemistry. A holistic approach, however, requires a look at the varied features: commonly discussed validation criteria, often underrated practical and economic aspects, and typically overlooked compliance with the principles of green analytical chemistry. Carrying out such an assessment in a critical and transparent way is extremely difficult without special tools. The purpose of this work is to discuss and compare the three different approaches that seem to be potential candidates: multi-criteria decision analysis methods (MCDA), HEXAGON, and RGB model. The basic principles of each methodology, individual possibilities offered, and the results of the assessment of selected model methods will be presented. Ultimately, the potential compatibility of assessing the same group of methods using different tools will be examined. This contribution can help to select optimal tool and conduct more thorough and insightful assessments.
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.