2023 - Repozytorium publikacji - Politechnika Gdańska

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Using Continuous Integration Techniques in Open Source Projects – An Exploratory Study
- Michał Wróbel
- Jarosław Szymukowicz
- Paweł Weichbroth
2023 Pełny tekst IEEE Access
For a growing number of software projects, continuous integration (CI) techniques are becoming an essential part of the process. However, the maturity of their adoption in open source projects varies. In this paper, we present an empirical study on GitHub repositories to explore the use of continuous integration techniques in open source projects. Following the Goal-Question-Metric (GQM) approach, 3 research questions and 7 metrics were defined for such a goal. We mined 10 repositories of open source projects with 101,149 pull requests, 399,671 commits from 20,432 developers. This was followed by exploratory data analysis for each metric. In summary, our results indicate that (RQ1) most failed CI builds required a small change in the pull request to fix the code; (RQ2) CI builds of smaller pull requests are more likely to succeed than larger ones; (RQ3) there was no correlation found between developer experience in committing to the project and the success rate of CI builds. Most of the projects studied have not yet developed a mature approach to using continuous integration techniques. In these cases, developers do not thoroughly test code before submitting pull requests. Furthermore, the results of the study confirmed that developers tend to submit pull requests with small amounts of new or modified code.
Using creative approaches for discovering biomorphic forms for appropriate human habitation in natural environments. Case study of Kashubian Lake District
- Agnieszka Kurkowska
2023 Pełny tekst Cogent Arts & Humanities
The research process consisted of studies of natural and cultural conditions of the Kashubian Lake District This is an area of exceptional natural conditions. For centuries, it has seen human habitation with respect to landscape values. Given its extensive forest cover and the lack of heterogeneity of natural conditions, the area has become an interesting inspiration for the author’s original project. The project is aimed at searching for appropriate forms of human habitation. Creative activities, owing to the creation of a large number of drawings and paintings that feature diagrams of initial forms, followed by sculptures inspired by them, aim at identifying biomorphic solutions, spatial forms that match the site of the study. Methodically, in order to achieve the goal, an original research and artistic concept was designed whose non-obvious results make it possible to treat the given task as a divergence problem. The essential artistic part comprised creating small-scale sculptures of clay, which were later to be placed in appropriately selected places. The photographic documentation offered the possibility to work at the analytical and comparative level, with an account of the obtained effects and their potential. Ultimately, the author seeks an answer to how to design houses in this region. The results come in the form of a complete multi-element set of biomorphic forms; directly or indirectly transformable into architectural objects, they provide model hints to classifiable sets of features conducive to arriving at a match with a place. The creative method proves appropriate for architectural design, as it constitutes its initial stage in the case of inhabiting natural environments. It yields favourable forecasts for creating a catalogue of design guidelines for residential buildings located in the area of the Kashubian Lake District.
Using Isolation Forest and Alternative Data Products to Overcome Ground Truth Data Scarcity for Improved Deep Learning-based Agricultural Land Use Classification Models
- Agustín Pereira García
- Lukasz Porwol
- Adegboyega Ojo
2023
High-quality labelled datasets represent a cornerstone in the development of deep learning models for land use classification. The high cost of data collection, the inherent errors introduced during data mapping efforts, the lack of local knowledge, and the spatial variability of the data hinder the development of accurate and spatially-transferable deep learning models in the context of agriculture. In this paper, we investigate the use of Isolation Forest (IF), an anomaly detection algorithm, to reduce noise in a large-scale, low-resolution alternative ground truth dataset used to train land use deep learning models. We use a modestsize, high-resolution and high-fidelity manually collected ground-truth dataset to calibrate Isolation Forest parameters and evaluate our approach, highlighting the relatively low cost of the methodology. Our data-centric methodology demonstrates the efficacy of deep learning methods coupled with IF to create mid-resolution land-use models and map products for agriculture using an alternative groundtruth dataset. Moreover, we compare our deep learning approach with a traditional algorithm used in remote sensing and evaluate the spatial transferability of the created models. Finally, we reflect upon the lessons learnt and future work
Using water sources extent during inundation as a reliable predictor for vegetation zonation in a natural wetland floodplain
- Tomasz Berezowski
- Martin Wassen
2023 Pełny tekst ECOLOGICAL INDICATORS
Distinctive zones of inundation water during floods were shown to originate from different sources in some major floodplains around the world. Recent research showed that the zonation of water in rivers and floodplains is related to vegetation patterns. In spite of this, water source zones were not used for vegetation modeling due to difficulties in their delineation. In this study, we used simulation results of a fully-coupled groundwater-surface water integrated hydrological model (IHM) HydroGeoSphere and the Hydraulic Mixing-Cell method to provide standard hydrological predictors (e.g. water depth, inundation length, groundwater depth, exchange flux) and the extent of inundation zones having a certain water source (discharged groundwater, river, rainfall, and snowmelt). These variables were used to train a vegetation model for the lower Biebrza floodplain (about 290 km2) using vegetation maps from 1960, 1980, and 2000. We used a one-at-a-time (OAT) approach, where each map was validated based on a model trained on the remaining two maps to obtain realistic error estimates. We also used a fractional approach in which a fraction of each map was used for training and validation. The single model from the fractional approach was used to assess the importance of predictors and to predict vegetation for the 20th century and for the 21st century using IHM simulation forced by the Twentieth Century Reanalysis data and EURO-CORDEX RCP 2.6, 4.5, and 8.5 model ensembles. The model which used both water sources extent and standard predictors performed the best overall and was sensitive to the future trends. The extent of river water within the inundation area was by far the most important vegetation predictor. The models that neither used the water sources extent predictors nor the exchange flux were not able to predict the trends of areas covered by certain vegetation types under future climate. The advantage of the water sources extent predictors was their ability to represent the spatial effect of local hydrological phenomena. This was not possible with the standard predictors, because they show only the source of the phenomena (e.g. groundwater discharge zone), but do not indicate the actual area affected by its physical and chemical properties, which is more relevant for vegetation development. Our results highlight the relevance of using water extent predictors due to their ability to explain spatiotemporal ecological processe
UWB-Based Indoor Navigation in a Flexible Manufacturing System Using a Custom Quadrotor UAV
- Petros Savvakis
- George-Ch. Vosniakos
- Emmanuel Stathatos
- Axel Debar-monclair
- Marek Chodnicki
- Panorios Benardos
2023
A novel solution for indoor navigation of a transportation drone in flexible manufacturing is presented in this paper. To address the challenges of accurate and robust drone navigation in occluded environments, an ultra-wideband (UWB) navigation system has been integrated with a commercially available open source control platform. The system offers high accuracy (± 20 mm), low power consumption, resistance to electronic interference, and support for automatic navigation. UWB technology has not been applied to drone navi-gation in flexible manufacturing before. Acceptable navigation accuracy was demonstrated in preliminary testing, which is expected to have significant im-plications for the efficiency and safety of manufacturing operations.
Validation of Interpolation Algorithms for Multiscale UV-VIS Imaging Using UAV Spectrometer
- Tomasz Berezowski
- Marcin Kulawiak
- Marek Kulawiak
2023
In this study, we present a comparison of popular methods for the interpolation of irregular spatial data in order to determine the applicability of each algorithm for hyperspectral reflectance estimation. The algorithms were benchmarked against a very high-resolution orthoimage from an RGB camera and medium-resolution satellite imagery from Sentinel-2A. We tested five interpolation algorithms: Triangulated Irregular Network (TIN), Inverse Distance Weighting (IDW), Ordinary Kriging (OK), Universal Kriging (UK), and Kriging with external drift (KED) for transformation of spectrometer reflectance footprint into reflectance images. Next we tested four downsampling methods: Box filtering, Gaussian, Catmull-Rom (Catrom) and Lanczos to compare the interpolated reflectance images with Sentinel-2 reflectance. Overall the best interpolation was achieved with the KED algorithm, and the lowest errors were achieved with the Gaussian downsampling method.
Vascular stents - materials and manufacturing technologies
- Klaudia Malisz
- Beata Świeczko-Żurek
2023 Pełny tekst Engineering of Biomaterials / Inżynieria Biomateriałów
The objective of this article is to present materials and technology for the manufacture of vascular stents with appropriate design requirements. The use of the right material is very important in implantology. A biomaterial introduced into the circulatory system must be biocompatible and hemocompatible. At the same time, it should not initiate toxic, mutagenic, or immunological reactions. Currently, 316L stainless steel (316L SS), nitinol (Ni-Ti alloy) and cobalt-chromium alloy (Co-Cr) are used as standard stent materials. Additionally, drug-containing coatings are used to provide antithrombotic properties. Nowadays, scientists are trying to create biodegradable stents (BDS) using magnesium (Mg) or zinc (Zn) alloys. Laser methods are generally used to manufacture stents using Nd:YAG lasers with a pulse length in the range of several milliseconds. Material removal is based on the ejection of the melt using a high-pressure gas. The result is remelting and heat-affected zones. Various post-processing procedures are necessary to remove residues, including etching and electropolishing. Minimizing the heat-affected zone could be achieved by using femtosecond lasers. Additionally, immersion of the material in water prevents the deposition of residues on the workpiece. Interesting alternatives used in the manufacture of vascular stents are electrospinning or additive techniques. 3D printing enables obtaining of geometrically complex and personalized implants and reduces the consumption of materials and the production of waste.
Very accurate time propagation of coupled Schrödinger equations for femto- and attosecond physics and chemistry, with C++ source code
- Jan Kozicki
2023 Pełny tekst COMPUTER PHYSICS COMMUNICATIONS
In this article, I present a very fast and high-precision (up to 33 decimal places) C++ implementation of the semi-global time propagation algorithm for a system of coupled Schrödinger equations with a time-dependent Hamiltonian. It can be used to describe time-dependent processes in molecular systems after excitation by femto- and attosecond laser pulses. It also works with an arbitrary user supplied Hamiltonian and can be used for nonlinear problems. The semi-global algorithm is briefly presented, the C++ implementation is described and five sample simulations are shown. The accompanying C++ source code package is included. The high precision benchmark (long double and float128) shows the estimated calculation costs. The presented method turns out to be faster and more accurate than the global Chebyshev propagator.
Vessel Energy Requirement Prediction from Acceleration Stage Towing Tests on Scale Models
- Klaudia Wrzask
2023 Pełny tekst Polish Maritime Research
One of the most crucial tasks for naval architects is computing the energy required to meet the ship’s operational needs. When predicting a ship’s energy requirements, a series of hull resistance tests on a scale model vessel is carried out in constant speed stages, while the acceleration stage measurements are ignored. Another important factor in seakeeping analysis is the ship’s hydrodynamic added mass. The second law of dynamics states that all this valuable information, that is, the dependence of the hull resistance on the vessel’s speed and the added mass, is accessible from just one acceleration stage towing test done up to the maximum speed. Therefore, the acceleration stage, often overlooked in traditional towing experiments, can be a valuable source of information. For this reason, this work aims to generalise Froude’s scaling procedure to full-scale vessels for the accelerated stage towing tests.
Vibration monitoring of structures in the light of the Polish and international requirements
- Aneta Herbut
- Anna Jakubczyk-Gałczyńska
- Marek Wyjadłowski
2023 Pełny tekst Studia Geotechnica et Mechanica
The paper concerns the wide range of strategies used to protect structures against man-made dynamic excitation. The most popular approaches applied worldwide are compared, and the main differences and similarities are summarized. The literature studies are supported by the results of the measurements performed on different types of real structures, which are sensitive and insensitive to the dynamic load. To make the conclusions more general, various types of excitation forces are examined (long-term and shortterm excitations, traffic load, and loads resulting from geotechnical works). The main issue raised in the paper is the problem of unequivocal and accurate assessment of the potential structure damage, based on the different legislations. It can be seen that the application of different codes can even result in opposite conclusions about the safety of the structure.
Vibrational Properties of LaNb0.8M0.2O4-δ (M=As, Sb, V, and Ta)
- Aleksandra Mielewczyk-Gryń
- Sebastian Wachowski
- Kacper Dzierzgowski
- Iga Szpunar
- Judyta Strychalska-Nowak
- Tomasz Klimczuk
- Sawczak Mirosław
- Maria Gazda
2023 Pełny tekst CHEMPHYSCHEM
LaNb0.8M0.2O4-δ (where M=As, Sb, V, and Ta) oxides with pentavalent elements of different ionic sizes were synthesized by a solid-state reaction method. The vibrational properties of these oxides have been investigated. These studies revealed that the substituent element influences both Debye temperature value as well as the Raman active vibrational modes. Additionally, the low-temperature vibrational properties of LaNb0.8Sb0.2O4-δ have been determined to show the phase transition occurrence at 260 K which is lower than previously reported.
Vibrational Quenching of Optically Pumped Carbon Dimer Anions
- Markus Nötzold
- Robert Wild
- Christine Lochmann
- Tanja Rahim
- Sruthi Purushu Melath
- Katrin Dulitz
- Barry P. Mant
- Jan Franz
- Francesco Antonio Gianturco
- Roland Wester
2023 Pełny tekst PHYSICAL REVIEW LETTERS
Careful control of quantum states is a gateway to research in many areas of science such as quantum information, quantum-controlled chemistry, and astrophysical processes. Precise optical control of molecular ions remains a challenge due to the scarcity of suitable level schemes, and direct laser cooling has not yet been achieved for either positive or negative molecular ions. Using a cryogenic wire trap, we show how the internal quantum states of C2- anions can be manipulated using optical pumping and inelastic quenching collisions with H2 gas. We obtained optical pumping efficiencies of about 96% into the first vibrational level of C2- and determined the absolute inelastic rate coefficient from v=1 to 0 to be k_q = (3.2±0.2stat±1.3sys)×10−13 cm3/s at 20(3) K, over 3 orders of magnitude smaller than the capture limit. Reduced-dimensional quantum scattering calculations yield a small rate coefficient as well, but significantly larger than the experimental value. Using optical pumping and inelastic collisions, we also realized fluorescence imaging of negative molecular ions. Our work demonstrates high control of a cold ensemble of C2−, providing a solid foundation for future work on laser cooling of molecular ions.
Virtual reality as a tool for development and simulation. Research projects and experience of the Gdańsk University of Technology
- Jacek Lebiedź
2023
By supporting the human imagination, virtual reality technology can be applied in almost every human activity. This is evidenced by the cooperation of the Immersive 3D Visualization Lab with specialists representing such different professions from architects and artists, astronomers and chemists, through historians and museologists, criminologists and military educators, mechanical and ship engineers, up to physicians and psychologists. The results of this cooperation are presented with an emphasis on architectural applications including not only building prototyping. New applications are welcome.
Virulence analysis and antibiotic resistance of Klebsiella pneumoniae isolates from hospitalised patients in Poland
- Barbara Kot
- Małgorzata Piechota
- Piotr Szweda
- Joanna Mitrus
- Jolanta Wicha
- Agata Grużewska
- Małgorzata Witeska
2023 Pełny tekst Scientific Reports
Klebsiella pneumoniae (KP) is a nosocomial pathogen causing difficult-to-treat infections. The presence of virulence genes and antibiotic resistance of 109 KP isolates from hospitalized patients were investigated. Among them, 68.8% were multi-drug resistant (MDR) and 59.6% produced extended-spectrum beta-lactamases (ESBLs). Metallo-β-lactamases (MBLs) were produced by 22% of isolates (mainly from anus), including 16.5% of isolates producing New Delhi metallo-β-lactamase (NDM-1). The genes encoding adhesins (fimH-91.7%, mrkD-96.3%), enterobactin (entB-100%) and yersiniabactin (irp-1-88%) were frequently identified. The genes encoding salmochelin (iroD-9.2%, iroN-7.3%) and colibactin (clbA, clbB-0.9%) were identified rarely. Iron acquisition system-related kfu gene and wcaG gene involved in capsule production were identified in 6.4% and 11% of isolates, respectively. The rmpA gene associated with hypermucoviscosity was present in 6.4% of isolates. In 19.2% of isolates magA gene was detected, specific for K1 capsule serotype, while 22.9% of isolates showed K2 capsule serotype. The rmpA, iroD or iroN genes being diagnostic biomarkers for hypervirulent KP (hvKP) were detected in 16.5% of isolates. We found that 55.5% of hvKP were MDR and produced ESBLs, thus hospital KP isolates pose a serious threat to the healthcare system.
Visual Features for Improving Endoscopic Bleeding Detection Using Convolutional Neural Networks
- Adam Brzeski
- Tomasz Dziubich
- Henryk Krawczyk
2023 Pełny tekst SENSORS
The presented paper investigates the problem of endoscopic bleeding detection in endoscopic videos in the form of a binary image classification task. A set of definitions of high-level visual features of endoscopic bleeding is introduced, which incorporates domain knowledge from the field. The high-level features are coupled with respective feature descriptors, enabling automatic capture of the features using image processing methods. Each of the proposed feature descriptors outputs a feature activation map in the form of a grayscale image. Acquired feature maps can be appended in a straightforward way to the original color channels of the input image and passed to the input of a convolutional neural network during the training and inference steps. An experimental evaluation is conducted to compare the classification ROC AUC of feature-extended convolutional neural network models with baseline models using regular color image inputs. The advantage of feature-extended models is demonstrated for the Resnet and VGG convolutional neural network architectures.
VOCs absorption from gas streams using deep eutectic solvents – A review
- Patrycja Makoś-Chełstowska
2023 Pełny tekst JOURNAL OF HAZARDOUS MATERIALS
Volatile organic compounds (VOCs) are one of the most severe atmospheric pollutants. They are mainly emitted into the atmosphere from anthropogenic sources such as automobile exhaust, incomplete fuel combustion, and various industrial processes. VOCs not only cause hazards to human health or the environment but also adversely affect industrial installation components due to their specific properties, i.e., corrosive and reactivity. Therefore, much attention is being paid to developing new methods for capturing VOCs from gaseous streams, i.e., air, process streams, waste streams, or gaseous fuels. Among the available technologies, absorption based on deep eutectic solvents (DES) is widely studied as a green alternative to other commercial processes. This literature review presents a critical summary of the achievements in capturing individual VOCs using DES. The types of used DES and their physicochemical properties affecting absorption efficiency, available methods for evaluating the effectiveness of new technologies, and the possibility of regeneration of DES are described. In addition, critical comments on the new gas purification methods and future perspectives are included.
Volatile Compound Emissions from Stereolithography Three-Dimensional Printed Cured Resin Models for Biomedical Applications
- Y Lan Pham
- Wojciech Wojnowski
- Jonathan Beauchamp
2023 CHEMICAL RESEARCH IN TOXICOLOGY
Stereolithography three-dimensional printing is used increasingly in biomedical applications to create components for use in healthcare and therapy. The exposure of patients to volatile organic compounds (VOCs) emitted from cured resins represents an element of concern in such applications. Here, we investigate the biocompatibility in relation to inhalation exposure of volatile emissions of three different cured commercial resins for use in printing a mouthpiece adapter for sampling exhaled breath. VOC emission rates were estimated based on direct analysis using a microchamber/thermal extractor coupled to a proton transfer reaction-mass spectrometer. Complementary analyses using comprehensive gas chromatography–mass spectrometry aided compound identification. Major VOCs emitted from the cured resins were associated with polymerization agents, additives, and postprocessing procedures and included alcohols, aldehydes, ketones, hydrocarbons, esters, and terpenes. Total VOC emissions from cubes printed using the general-purpose resin were approximately an order of magnitude higher than those of the cubes printed using resins dedicated to biomedical applications at the respective test temperatures (40 and 25 °C). Daily inhalation exposures were estimated and compared with daily tolerable intake levels or standard thresholds of toxicological concerns. The two resins intended for biomedical applications were deemed suitable for fabricating an adapter mouthpiece for use in breath research. The general-purpose resin was unsuitable, with daily inhalation exposures for breath sampling applications at 40 °C estimated at 310 μg day–1 for propylene glycol (tolerable intake (TI) limit of 190 μg day–1) and 1254 μg day–1 for methyl acrylate (TI of 43 μg day–1).
VREA PROJECT - A DIGITAL CURATOR FOR ARCHITECTURE AND DIGITAL PERSPECTIVES FOR HERITAGE MANAGEMENT AND ENHANCEMENT
- Justyna Borucka
- Sandro Parrinello
2023 Pełny tekst International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences
Thinking about architectural education, one must face the challenges of the ever-changing and digital world and bear in mind the figure of the architect of the future - the curator of digital data. Nowadays the aim is to train specialists who know how to manage the production of digital products and are able to face the challenges of digital change in the field of architecture and architectural heritage management. Virtual Reality Engineering and Game Design for Architecture and Cultural Heritage (VREA) will be a new Master’s degree course designed to generate a new professional figure in charge of the technological evolution and at the same time having critical sensitivity towards the architectural heritage, its conservation, and enhancement. These objectives received funding as part of the call of European Erasmus Mundus Design Measures (ERASMUS-EDU-2021-EMJM-DESIGN) for the development of new, innovative, high-level integrated transnational study programmes at the Master level. VREA project aims to create a basis for a new international joint Master level course to create a new generation of architects and engineers equipped with the cultural and technical knowledge for managing Digital Twins in the field of Cultural Heritage, outlining at the same time the future course of study for architects and engineers. The result of the work is an innovative, international and comprehensive programme, strengthening the competences of all project participants and aimed at educating architects and engineers of the future, prepared for the challenges of the 21st century.
W poszukiwaniu równowagi: aplikacja do nauki analizy statycznej układów prętowych
- Katarzyna Szepietowska
- Violetta Konopińska-Zmysłowska
- Magdalena Oziębło
- Anna Pestka
- Mateusz Sondej
- Karol Winkelmann
- Łukasz Żmuda-Trzebiatowski
- Agnieszka Tomaszewska
2023
Praca dotyczy interaktywnej aplikacji mającej wesprzeć naukę analizy statycznej układów prętowych. Aplikacja jest tworzona z myślą o studentach I roku budownictwa i kierunków pokrewnych. Wyznaczenie wykresów sił wewnętrznych jest podstawą procesu projektowania konstrukcji. Chociaż współcześnie stosuje się programy do komputerowej analizy konstrukcji, to projektant nadal musi potrafić zinterpretować wynik i ocenić jego poprawność. Aplikacja ma służyć jako narzędzie treningowe do nauki wyznaczania wykresów sił wewnętrznych w układach statycznie wyznaczalnych oraz oferować system natychmiastowej informacji zwrotnej i wskazówek służących nauce samodzielnej kontroli poprawności rozwiązania. W pierwszym etapie pracy z aplikacją użytkownik może rozwiązywać zadania sprawdzając wyniki cząstkowe i uzyskując szczegółowe podpowiedzi w przypadku uzyskiwania złych wyników. Po przejściu na wyższe poziomy zaawansowania, cząstkowe informacje zwrotne będą stopniowo ograniczane, a system będzie podpowiadał, jak samodzielnie weryfikować wyniki. Cześć analizowanych schematów statycznych będzie wprost odzwierciedlała rzeczywiste konstrukcje budowlane, co pomoże studentom lepiej zrozumieć połączenie mechaniki (teorii) z obiektami fizycznymi. Proponowana interaktywna aplikacja ma wyjść naprzeciw potrzebom współczesnych studentów i ułatwić im systematyczną i efektywną pracę własną.
W stronę postliberalizmu. Filozofia społeczna i polityczna Johna Milbanka
- Jakub Gużyński
2023
Celem rozprawy jest krytyczna analiza programu postliberalnego anglikańskiego teologa Johna Milbanka. Jego twórczość nie tylko wpisuje się w nurt teologii postliberalnej, która przyjmuje kulturowo-językową interpretację religii, uwydatniając pierwotność narracji w poznaniu, lecz także stanowi istotny wkład w postliberalną filozofię polityczną, który porzuca charakterystyczny dla liberalizmu indywidualizm, uniwersalizm i racjonalizm, szukając inspiracji w tradycyjnym rozumieniu polityki. Łącząc te dwa wymiary, Milbank przedstawia niezwykle oryginalną perspektywę, która być może najpełniej wyraża ideę postliberalizmu, oferując spójną wizję polityki chrześcijańskiej. W toku wywodu zwracam uwagę na szereg wątpliwości, problemów i obaw, które towarzyszą teologiczno-politycznej wizji Milbanka. Większość z nich wynika z jego skrajnego dualizmu, który tworzy fałszywe dychotomie – chrześcijaństwo albo nihilizm, ortodoksja albo sekularyzm, socjalizm albo faszyzm – upraszczając wiele skomplikowanych kwestii i utrudniając otwartą dyskusję. Co za tym idzie, mimo wielu cennych spostrzeżeń, trafnych diagnoz i interesujących postulatów Milbanka w mojej ocenie jego program postliberalny nie jest jeszcze gotowy do zastąpienia liberalizmu jako dominującego systemu ideowego. Mimo to daje on wskazówkę, jak może wyglądać nasza przyszłość polityczna i oferuje godną uwagi, postsekularną wizję chrześcijaństwa.