2020 - Repozytorium publikacji - Politechnika Gdańska

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Open Data Capability Architecture - An Interpretive Structural Modeling Approach
- Adegboyega Ojo
2020 Pełny tekst
Despite of increasing availability of open data as a vital organizational resource, large numbers of startups and organizations fail when it comes to utilizing open data effectively. This shortcoming is attributable to the poor understanding of what types of capabilities are required to successfully conduct data related activities. At the same time, research on open data capabilities and how they relate to one another remains sparse. Guided by extant literature, interviews of these organizations, and drawn from Interpretive Structural Modeling (ISM) approach which are pair comparison methods to evolve hierarchical relationships among a set of elements to convert unclear and unstructured mental models of systems into well-articulated models that act as base for conceptualization and theory building, this study explores open data capabilities and the relationships and the structure of the dependencies among these areas. Findings from this study reveal hitherto unknown knowledge regarding how the capability areas relate one another in these organizations. From the practical standpoint, the resulting architecture has the potential to transform capability management practices in open data organizations towards greater competitiveness through more flexibility and increased value generation. From the research point of you, this paper motivates theory development in this discipline
Open-Source Coprocessor for Integer Multiple Precision Arithmetic
- Kamil Rudnicki
- Tomasz Stefański
- Wojciech Żebrowski
2020 Pełny tekst Electronics
This paper presents an open-source digital circuit of the coprocessor for an integer multiple-precision arithmetic (MPA). The purpose of this coprocessor is to support a central processing unit (CPU) by offloading computations requiring integer precision higher than 32/64 bits. The coprocessor is developed using the very high speed integrated circuit hardware description language (VHDL) as an intellectual property (IP) core. Therefore, it can be implemented within field programmable gate arrays (FPGAs) at various scales, e.g., within a system on chip (SoC), combining CPU cores and FPGA within a single chip as well as FPGA acceleration cards. The coprocessor handles integer numbers with precisions in the range 64 bits–32 kbits, with the limb size set to 64 bits. In our solution, the sign-magnitude representation is used to increase the efficiency of the multiplication operation as well as to provide compatibility with existing software libraries for MPA. The coprocessor is benchmarked in factorial ( n! ), exponentiation ( nn ) and discrete Green’s function (DGF) computations on Xilinx Zynq-7000 SoC on TySOM-1 board from Aldec. In all benchmarks, the coprocessor demonstrates better runtimes than a CPU core (ARM Cortex A9) executing the same computations using a software MPA library. For sufficiently large input parameters, our coprocessor is up to three times faster when implemented in FPGA on SoC, rising to a factor of ten in DGF computations. The open-source coprocessor code is licensed under the Mozilla Public License.
Open-source software (OSS) and hardware (OSH) in UAVs
- Paweł Burdziakowski
- Navid Razmjooy
- Vania Estrela
- Jude Hemanath
2020 Pełny tekst
The popularity of the Open Source Tool (OST) has expanded significantly. This is the case for Unmanned Aerial Vehicles (UAVs) based on open-source hardware (OSH) as well. Open-source software (OSS) and OSH can be applied in a wide range of applications and can improve several technologies. The chapter begins with an introduction to OSS depicting its rationale, description of fundamental differences between OSS and proprietary software (PS), what benefits OSSs provide to overall UAV community, the motives leading people to pick up an OSS instead of a PS, which helps the academic and research community. This chapter also covers some OSSs used within the UAV community to support all aspects of UAV technology and the Remote Sensing (RS) and photogrammetry data post-processing chain. It is possible to build fully autonomous and operational UAV based only on OSH and OSS. The chapter describes the state of the art for OSS widely used in UAV technology, the software used in all aspects of UAV technology such as ARDUPILOT-based Autopilot firmware, MISSION PLANNER-based ground station, OPENTX transmitter software, MINIM On-Screen Data (OSD) software, Open Drone Map photogrammetry data processing suite, Web drone data-processing suite WebODM. This chapter describes several concepts and characteristics of open software/hardware, built-in functions, and particular features as well as platform requirements. A typical UAV photogrammetry workflow for drone construction with flight planning/execution and OSS data processing is provided.
Operation of the Hybrid Photovoltaic-Battery System on the Electricity Market—Simulation, Real-Time Tests and Cost Analysis
- Robert Małkowski
- Marcin Jaskólski
- Wojciech Pawlicki
2020 Pełny tekst ENERGIES
This paper presents research on a hybrid photovoltaic-battery energy storage system, declaring its hourly production levels as a member of a balancing group submitting common scheduling unit to the day-ahead market. It also discusses the variability of photovoltaic system generation and energy storage response. The major research questions were whether the operation of a hybrid photovoltaic-battery energy storage system is viable from the technical and economic viewpoint and how to size battery energy storage for that purpose. The DIgSILENT PowerFactory environment was used to develop the simulation model of postulated hybrid system. Then, tests were conducted on real devices installed in the LINTE^2 laboratory at Gdańsk University of Technology, Poland. Firstly, power generation in the photovoltaic system was modeled using hardware in the loop technique and tested in cooperation with emulated photovoltaic and real battery energy storage system (lithium-ion battery, 25 kWh). Secondly, a real photovoltaic power plant (33 kW) and real battery energy storage were applied. The results obtained from laboratory experiments showed that market operation of hybrid photovoltaic-battery energy storage system is feasible. However, developing a control strategy constitutes a great challenge, as the operator is forced to intervene more frequently than the simulation models indicate in order to keep the parameters of battery storage within accepted ranges, especially in view of a sudden weather breakdown. Levelized cost of electricity from photovoltaic-battery energy storage system varied from 314 to 455 $/MWh, which has proven to be from two to three times higher than the current annual average day-ahead market price in Poland.
Opinia historyczno-konserwatorska o projekcie koncepcyjnym przebudowy wnętrz zabytkowego budynku centrali Banku Gospodarstwa Krajowego w Warszawie autorstwa przcowni JEMS Architekci z 2020 r. w świetle ochrony modernistycznego dziedzictwa kulturowego
- Maria Sołtysik
2020
Opinia o projekcie koncepcyjnym przebudowy wnętrz zabytkowego budynku centrali Banku Gospodarstwa Krajowego w Warszawie autorstwa pracowni JEMS Architekci z 2020 r została wykonana w świetle ochrony modernistycznego dziedzictwa kulturowego. Opinia zawiera 6 głównych rozdziałów: 1. Informacje wstępne; 2. Główne kierunki i idee modernizmu w architekturze okresu międzywojennego; 3. Historyczne wnętrza gmachu centrali BGK - wybitne dzieło polskiego modernizmu, symbol nowoczesności Polski międzywojennej i świadectwo ważnej roli Banku w życiu gospodarczym kraju; 4. Cel konserwatorski przebudowy wnętrz gmachu BGK i rola w tym procesie współczesnego BGK jako gospodarza obiektu; 5. Specyfika ochrony dziedzictwa modernizmu i opinia dotycząca głównych wytycznych ochrony konserwatorskiej wnętrz BGK w świetle celu konserwatorskiego przebudowy; 6. Analiza projektu koncepcyjnego przebudowy wnętrz centrali BGK autorstwa JEMS Architekci pod kątem zachowania historycznego dziedzictwa materialnego i niematerialnego wnętrz BGK z lat 1928-31; 7. Podsumowanie opinii. Wykonana opinia stała się podstawą dla zasadniczej korekty pierwotnego projektu koncepcyjnego przebudowy wnętrz gmachu BGK i podstawą do wykonania realizowanego obecnie projektu budowlanego tej przebudowy.
Opportunities and challenges for exploiting drones in agile manufacturing systems
- Mariusz Deja
- Mieczysław S. Siemiątkowski
- George-Ch. Vosniakos
- Gerasimos Maltezos
2020 Pełny tekst Procedia Manufacturing
Drones have become an advanced supply chain implementation instrument, especially in connecting warehouses to outlet points or even individual customers. However, their potential application in an intra-logistics framework has not been studied, let alone explored so far. Modeling and simulations in virtual environments can help explore and evaluate the opportunities for practical and profitable applications of drones in manufacturing systems. This paper considers use of drones in replacing or supplementing industrial robots, transportation systems and humans in factories, especially regarding agile manufacturing under the requirements of flexibility, reconfigurability and collaboration. Currently available drone technology regarding positioning, navigation and communication is examined in order to define possible individual tasks and general operations that they can perform, as well as pertinent limitations. A typical scenario of a flexible manufacturing system is simulated and conceptually presented for discussing drone integration and missing links. The main issues refer to mechanical integration with machinery and parts, information integration in the manufacturing system, especially in an Industrial Internet of Things direction, scheduling and collaboration with humans and robots including safety.
Optical sensor of a person sitting on a chair and dressed in multi-layered clothes vital signs monitoring
- Adam Bujnowski
- Mariusz Kaczmarek
- Kamil Osiński
- Michal Gramowski
- Jerzy Wtorek
2020 Pełny tekst
An optoelectronic device enhancing a smart chair functionality is presented in the paper. Its essential purpose is a detection of a sitting person presence on the chair by means of detecting the vital signs. Additionally, it could be used for determining of clothes layer parameters useful in adjusting a system of a capacitive electrocardiography.
Optimisation of turbine shaft heating process under steam turbine run-up conditions
- Krzysztof Dominiczak
- Marta Drosińska-Komor
- Romuald Rządkowski
- Jerzy Głuch
2020 Pełny tekst Archives of Thermodynamics
An important operational task for thermal turbines during run-up and run-down is to keep the stresses in the structural elements at a right level. This applies not only to their instantaneous values, but also to the impact of them on the engine lifetime. The turbine shaft is a particularly important element. The distribution of stresses depends on geometric characteristics of the shaft and its specific locations. This means a groove manufactured for fixing the rotor blades. The extreme stresses in this place occur during the start-up and the shaft heating to normal operating temperature. The process needs optimisation. Optimization tasks are multidisciplinary issues and can be carried out using different methods. In recent years, particular attention in optimisation has been paid to the use of artificial intelligence methods. Among them, a special role is assigned to genetic algorithms. The paper presents a genetic algorithm method to optimise the steam turbine shaft heating process during its start-up phase. The presented optimization task of this algorithm is to carry out the process of the shaft heating as soon as possible at the conditions of not exceeding the stresses at critical locations at any heating phase.
OPTIMISING RIG DESIGN FOR SAILING YACHTS WITH EVOLUTIONARY MULTIOBJECTIVE ALGORITHM
- Mikołaj Pawłusik
- Rafał Szłapczyński
- Artur Karczewski
2020 Pełny tekst Polish Maritime Research
The paper presents a framework for optimising a sailing yacht rig using Multi-objective Evolutionary Algorithms and for filtering obtained solutions by means of a Multi-criteria Decision Making method. A Bermuda sloop with discontinuous rig is taken under consideration as a model rig configuration. It has been decomposed into its elements and described by a set of control parameters to form a responsive model which can be used for optimisation purposes. Considering the contradictory nature of real optimisation objectives, a multi-objective approach has been chosen to address this issue. Once the optimisation process is over, a Multi-criteria Decision Making method based on a w-dominance relation is applied for filtering out the most interesting solutions from the obtained Pareto set. The proposed method has been implemented, and selected results are provided and discussed.
Optimization of liquid chromatographic separation of pharmaceuticals within green analytical chemistry framework
- Aysegul Dogan
- Marek Tobiszewski
2020 Pełny tekst MICROCHEMICAL JOURNAL
The contribution is aimed at the development of methodology that allows to consider green analytical chemistry criteria during optimization of liquid chromatographic separation with design of experiment. The objectives of the optimization are maximization of peak areas of five non-steroid anti-inflammatory drugs, maximization of resolution between peaks, with simultaneous shortening of chromatographic separation time and minimization of mobile phase environmental impact. This is obtained with design of experiment to consider many experimental conditions and Derringer's desirability function to combine many optimization objectives. The possibilities of introduction different green analytical chemistry metrics are discussed and the methodology of mobile phase greenness assessment is proposed. The optimal response for all objectives is obtained for 0.96 mL min−1 of mobile phase flow rate, 61% of MeOH content, temperature of 25°C and pH equal to 4.5. The separation takes less than 9 min.
Optimization of Stabilizing Systems in Protection of Cultural Heritage: The Case of the Historical Retaining Wall in the Wisłoujście Fortress
- Piotr Chudoba
- Jarosław Przewłócki
- Piotr Samól
- Lesław Zabuski
2020 Pełny tekst Sustainability
The aim of the paper is to propose new quantitative criteria for selecting the optimal method of securing and repairing a historical object, which take into account Structural, Conservation and Architectural aspects (the S–C–A method). Construction works on cultural heritage sites tend to be challenging and require an interdisciplinary approach. Therefore, they are strictly related to the philosophy of sustainable development which seeks adequate proportions between factors indicated on the natural and social environment. Optimization of several systems stabilizing retaining structure that are a historic object was considered in the paper. Appropriate formulas for scores meeting additional conservation and aesthetic requirements were proposed. The method is used in the stabilization of the brick retaining wall, a part of the Wisłoujście Fortress located in Gdańsk, Poland. In order to compute the displacement of the wall and its stability, numerical analysis was performed by the two-dimensional explicit Finite Difference Method (using the FLAC2D software). The algorithm proposed could be beneficial to the protection of cultural heritage since it could also be applied to other structures, such as roof trusses, masonry walls, pillars, etc.
Optimization of Wireless Networks for Resilience to Adverse Weather Conditions
- Michał Pióro
- Emma Fitzgerald
- Ilya Kalesnikau
- Dritan Nace
- Jacek Rak
2020
In this chapter, we consider how adverse weather conditions such as rain or fog affect the performance of wireless networks, and how to optimize these networks so as to make them robust to these conditions. We first show how to analyze the weather conditions in order to make them useful for network optimization modelling. Using an example realistic network, we show how to optimize two types of wireless networks: free-space optical (FSO) networks and wireless mesh networks (WMN). The key difference between the two network types is that in WMNs, links interfere with each other, while in FSO networks, link rates may be assumed independent. We formulate optimization problems to protect each network type against adverse weather conditions, discuss solution methods to solve them and present a numerical study illustrating the considerations of the chapter.
Optimized Space-Vector Modulation Schemes for Five-Phase Precision Low-Speed Drives with Minimizing the Stator Current Ripple
- Valentin Tomasov
- Aleksander Usoltsev
- Denis Vertegel
- Paweł Szczepankowski
- Ryszard Strzelecki
- Nikolai Poliakov
2020 Pełny tekst
One of the main ways to improve the quality of a precision electric drive is minimization of the stator current pulsations generated by the voltage inverter. The solution of this problem can be achieved by using of multiphase inverters, as well as improving control algorithms. This paper considers the influence of the space-vector modulation algorithm with different switching sequences of basic vectors on the stator current pulsations generated by the five-phase voltage inverter.
Optymalizacja prędkości obrotowej narzędzia podczas frezowania przedmiotów wielkogabarytowych
- Krzysztof Kaliński
- Marek Galewski
- Michał Mazur
- Natalia Stawicka-Morawska
2020
Przedstawiono nową metodę wyznaczania optymalnej prędkości obrotowej narzędzia podczas frezowania przedmiotów wielkogabarytowych. Parametry modelu obliczeniowego (modalnego) przedmiotu obrabianego są wyznaczane z wykorzystaniem jedynie eksperymentalnej analizy modalnej. To ostatnie umożliwia eliminację pracochłonnego etapu modelowania przedmiotu, jakim jest stosowane dotychczas tworzenie i walidacja modelu MES. Otrzymany w ten sposób model jest następnie wykorzystywany do symulacji procesu obróbkowego. Ponadto, podczas symulacji uwzględniany jest model obliczeniowy wirującego narzędzia oraz przyjęty model dynamiki procesu skrawania. Skuteczność metody potwierdzono na podstawie wyników badań eksperymentalnych procesu.
Orbital blowout trauma occurring at the workplace – clinical, biomechanical and legal aspects
- Andrzej Skorek
- Paweł Kłosowski
- Krzysztof Żerdzicki
- Piotr Skorek
- Paweł Lemski
- Marcin Zmuda Trzebiatowski
2020 Pełny tekst Journal of Pre-Clinical and Clinical Research
Introduction and objective: Craniofacial injury at the workplace may lead to orbital blowout fractures. The aim of the study is the development of own numerical model of the eye orbit, assessment of the damage zones, and comparing them with clinical examinations. In addition, the current legal status of patients after injuries is presented Material and methods: In laboratory tests performed on bones collected from the upper and medial orbital wall (examination on fresh corpses), the Young’s modulus was determined for these bones. Based on the CT image, a numerical model of the eye orbit was created. The damage zones within the eye socket were assessed after a blow (dynamic model) to the inferior and lateral walls, and only to the inferior wall. Comparative clinical material were 9 patients with orbital blowout fracture treated at the Clinic of Otolaryngology Results: Experiment 1: the damage zone covered an area of 0.54cm2, and was located medially and laterally from the infraorbital nerve canal. Experiment 2: the damage zone was smaller – 0.38 cm2, and located medially to the infraorbital nerve canal. The results obtained in the experiment were compared with the CT image of the eye sockets of patients after injuries. On this basis, presumptions were made concerning the mechanism of the trauma. Conclusions: The finite element method is a good tool for assessing the pathomechanism of trauma, as well as for an attempt to determine the circumstances of the event. Based on analysis of the numerical and clinical images, the necessity for using protective measures which absorb the impact to the inferior wall and temporal areas should be emphasised, as well as the fact that using merely goggles is insufficient protection of the eye orbit.
Organisational Competence vs Transferability of Knowledge in Cluster Organisations and Technology Parks
- Anna Lis
- Jolanta Žemgulienė
2020 Pełny tekst Engineering Management in Production and Services
Purpose. The main paper aims to evaluate the impact of organisational competence on knowledge and information flows within cluster organisations and technology parks, with particular emphasis on innovative content knowledge. The paper addresses the research question: “What set of competencies of cooperating companies allows access to information and knowledge in cluster and parks structures?" Methodology. The authors report their findings from a quantitative study carried out in four cluster organisations and three technology parks functioning in Poland. The research sample covered a total of 269 enterprises: 132 cluster members and 137 park tenants. The primary method of data collection was a survey questionnaire. Data analysis was conducted using the interdependence of variables, ANOVA, and logistic regression. Results. The research showed that the surveyed enterprises from both analysed groups preferred cooperation with partners of a similar level of competence development and the same or complementary scope of competence. This set of competencies of cooperating organisations also guaranteed better access to information and knowledge resources, including confidential information and new knowledge. This study additionally indicated that the knowledge creation activities performed by the cooperating cluster organisations depended on the proximity of the competencies of organisations as well as on the nature of the information, disseminated within the cluster organisations. The theoretical contribution. The theoretical contribution is related to the results obtained by analysing the phenomenon of information and knowledge dissemination in cluster and park structures, revealing the impact made by the competence proximity of cooperating organisations on the access to this such resources. Thus, the findings supplement the state-of-the-art knowledge of the concept of industrial clusters by presenting a broader view on cooperation developed in geographical proximity, based on a set of various partner competencies.
Organizacja systemu opieki nad seniorami wyzwaniem dla samorządów lokalnych
- Anita Richert-Kaźmierska
2020 Pełny tekst Acta Universitatis Lodziensis Folia Oeconomica
A significant part of the activities undertaken so far under the senior policy, also at the local level, have been focused on seniors’ social (physical and educational) activation. The growing number of the oldest seniors, with limited independence, living alone in single‑person households, away from their families, will force the policy priorities to be reoriented in such a way as to develop efforts to provide different types of support and care for older citizens. The results of research carried out by different researchers confirm that the system of care for seniors with independence restrictions, based mainly on the family members support, is no longer applicable. However, finding a good solution in new conditions will be extremely difficult. First of all, due to the seniors’ preferences (the desire to spend old age in their own home, in familiar surroundings), social conditions and family relationships (singularization in old age, loosening family and social relationships, transferring social relationships into the virtual sphere inaccessible for many seniors), labor market situation (staff deficit in the care system) and public finances (the need to rationalize the growing public expenditure related to the provision of health and care services). The aim of the article is to present selected aspects of seniors’ care system organization in Poland in local territorial units’ perspective. In the article author presents the results of literature analysis of seniors’ care system in Poland, discusses the results of an interview conducted among the seniors of one of the Pomeranian communes regarding availability of care from the closest family members, as well as proposes the concept of organizing the local care system for seniors
Organizational Wisdom: The Impact of Organizational Learning on the Absorptive Capacity of an Enterprise
- Agata Pierścieniak
- Monika Stelmaszczyk
2020 Pełny tekst European Research Studies Journal
Purpose: In this article, we analyze the concept of organizational wisdom, indicating its key elements and verifieng the relationships between them. Design/Methodology/Approach: The study was conducted at Vive Textile Recycling Sp. z o.o in Poland. Empirical data was collected from 138 managers using the PAPI technique. Structural equation modelling (SEM) was performed to test the research hypotheses. Additionally, the significance of indirect effects was checked, using the bootstrap method. Findings: Our findings show that organizational wisdom can, from the perspective of management sciences, be considered as a configuration of two elements: organizational learning and absorptive capacity. Our analysis shows that exploitative organizational learning plays an important role in shaping both potential and realized absorptive capacity. Exploratory organizational learning, in contrast, only affects the realized absorptive capacity. Practical Implications: Our research in practice will allow managers to understand that for the company to successfully achieve its goals, considering the changing environment, it should show organizational wisdom. To shape the ability to acquire, assimilate, transform, and make use of valuable external knowledge, they ought to rely on procedures (processes, databases, competences, etc.) that they know well. Their recent procedures or processes will only be capable of influencing their ability to transform and apply external knowledge. Originality/Value: The value of our research is drawing attention to the categories of organizational wisdom, which is not often analyzed in management sciences. The originality of our considerations consists in our attempt to describe the phenomenon not only by indicating its main elements, but also by establishing the relationship between them.
Oscylacyjna metoda oceny oporu toczenia opon samochodowych na nawierzchniach drogowych o różnej teksturze i sztywności
- Wojciech Owczarzak
2020 Pełny tekst
Opór toczenia jest jednym z trudniejszych do wyznaczenia parametrów opon samochodowych. Jest to spowodowane tym, iż w przypadku nowoczesnych opon siła oporu toczenia odpowiada 0,5–1% obciążenia opony, dlatego pomiary bardzo małych sił muszą być wykonywane w silnie obciążonym układzie. Stanowi to ogromny problem, szczególnie w warunkach drogowych. Pomiary laboratoryjne są łatwiejsze do wykonania, ze względu na możliwość kontrolowania warunków otoczenia, jednakże w większości przypadków maszyny bieżne nie mogą być wyposażone w prawdziwe nawierzchnie drogowe. Zazwyczaj są to stalowe bębny lub w najlepszym wypadku bębny pokryte replikami nawierzchni. Niniejsza rozprawa doktorska opisuje laboratoryjną metodę oceny oporu toczenia, którą można zastosować do wstępnej oceny nawierzchni drogowych (na podstawie małych próbek nawierzchni) oraz opon. Metoda opiera się na pośrednim pomiarze strat energetycznych występujących w wyniku cyklicznego dociskania opony do nawierzchni, wymuszonego swobodnym spadaniem powodującym oscylacje układu zawierającego masę, sprężystość i tłumienie.
Otopy Classification of Gradient Compact Perturbations of Identity in Hilbert Space
- Piotr Bartłomiejczyk
- Piotr Nowak-Przygodzki
2020 FILOMAT
We prove that the inclusion of the space of gradient local maps into the space of all local maps from Hilbert space to itself induces a bijection between the sets of the respective otopy classes of these maps, where by a local map we mean a compact perturbation of identity with a compact preimage of zero.