Wyniki wyszukiwania - BazTech

1

Analysis and evaluation of the behavior of the distance behind a vehicle at a motorway exit

Olejnik Krzysztof

Zeszyty Naukowe Politechniki Morskiej w Szczecinie

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2025

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nr 83 (155)

80--87

EN

This paper presents considerations for maintaining the necessary distance behind the preceding vehicle in traffic. The special case of the need to exit a motorway from the left-hand lane when there is heavy traffic is analyzed and evaluated. The legislation uniquely does not address such a case. In addition, the special case of entering a motorway has been analyzed and evaluated. When operating vehicles on the roads, we are exposed to non-compliance with the rules and the resulting offences and accidents. The human factor and unreasonable and “out of life” rules contribute enormously to their occurrence. These are from the area of the active safety system in the operation of vehicles on the road. The conclusions point to the need to change the provisions in the current road traffic law and to provide training for car drivers.

2

The triangle of harmonious development of a modern organization - an integrated approach

Suchacka Małgorzata, Żak Monika

Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska

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2025

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z. 218

621--635

EN

Purpose: The aim of this article is to underline and explain the need for comprehensive scientific reflection on the functioning model of organization based on two factors: work and family life with a third element - technology. Design/methodology/approach: The article is a review and discussion. The conclusions presented in the article are the result of non-reactive research based on the analysis of secondary sources - scientific literature. The method of scientific inference was inductive. Sources of information used to write this article are interdisciplinary in nature: in the field of management sciences, sociology, psychology and ethics. Findings: The value of the analysis is the attention focused on an attempt to maintain a balance between all components, i.e. working time, family/private life and technology (tech-life balance. The authors prepared a model in the form of a diagram of overlapping areas and their characteristics that can be used in subsequent empirical studies. For this purpose, the most important theoretical approaches present in the literature of various scientific disciplines concerning, among others, the concepts of work-life balance, sustainable digital footprint and tech-life harmony were conceptualized. Research implications: Future research should consider examining the impact of the highlighted factors on organizational development, providing a more comprehensive analysis of the impact of individual areas on entrepreneurs' decisions. Originality/value: This article presents a holistic perspective of conscious management within the distinguished areas of a harmoniously developing organization. Entrepreneurs can benefit from implementing a holistic management strategy that can improve business efficiency, encourage innovation, and improve coping with business challenges.

3

The role of work-life-balance in effective business management

Kasperczuk Anna, Ćwiąkała Michał, Górka Ernest, Ręczajski Piotr, Mrzygłód Piotr, Frasunkiewicz Maciej, Darcińska-Głębocka Agnieszka, Piwnik Jan, Gardocki Grzegorz

Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska

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2025

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z. 215

149--158

EN

Purpose: This paper explores the role of work-life balance (WLB) in enhancing employee motivation. It also examines how balancing professional and personal life impacts business management. Design/methodology/approach: The research used a quantitative methodology and an online survey of 102 individuals. It focused on flexible working hours, private medical care, and company cars. Findings: Flexible working hours were the most effective tool for improving WLB. A positive correlation was found between WLB perception and employee motivation. Research limitations/implications: The study is limited to a specific demographic and geographic scope. Future research could explore diverse cultural and occupational contexts. Practical implications: Flexible working hours and private medical care significantly enhance employee satisfaction. These strategies also strengthen employer branding and reduce turnover. Social implications: Promoting WLB can reduce stress and improve societal well-being. Organisations adopting WLB strategies set benchmarks for corporate social responsibility. Originality/value: This study evaluates WLB tools and their impact on employee motivation. It provides valuable insights for HR managers and organisational leaders.

4

Regioselektywna c−h funkcjonalizacja izoksazoli katalizowana metalami przejściowymi : postęp i spostrzeżenia mechanistyczne

Kumar Pravin

Wiadomości Chemiczne

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2025

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[Z] 79, 5-6

359--379

PL

Izoksazole są układem heterocyklicznym powszechnym w ratujących życie lekach, produktach farmaceutycznych oraz wykazujących aktywność biologiczną związkach naturalnych. Katalizowana metalami przejściowymi C−H funkcjonalizacja izoksazoli zyskała znaczną uwagę ze względu na jej potencjał do bezpośredniej modyfikacji tych związków bez konieczności wcześniejszej funkcjonalizacji. Niniejszy artykuł przedstawia najnowsze postępy w regioselektywnej C−H funkcjonalizacji izoksazoli, skupiając się na układzie katalitycznym, strategii wykorzystującej grupy kierujące oraz zrozumieniu mechanizmów tych procesów.

EN

Isoxazoles are a versatile heteroaromatic scaffold prevalent in various life-saving drugs, pharmaceuticals, and biologically active natural products. Transition metal-catalyzed C−H functionalization of isoxazole has gained significant attention due to its potential for direct modification without pre-functionalization. This review highlights the recent advances in the regioselective C−H functionalization of isoxazoles, focusing on the catalyst system, directing group strategy, and mechanistic understanding.

5

Integrating ADS-B Data for Enhanced Airport Noise Modeling and Environmental Management

Kazhan Kateryna

Transactions on Aerospace Research

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2025

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Nr 1 (278)

55--70

EN

Although the COVID-19 crisis reduced the total number of people suffering from aviation noise, along with significant noise reduction achieved through the effective implementation of the ICAO Balanced Approach, aviation noise continues to be a sensitive environmental factor for local communities. Developing a comprehensive management strategy requires realistic input data for accurate noise modeling and management. This study explores the integration of ADS-B data to improve aviation noise management and multicriteria optimization. The maximum entropy approach is applied to incorporate environmental and operational interrelationships, including noise criteria from various sources. This proposed methodology presents a holistic approach that unites aviation noise modeling, monitoring/measuring, and management to identify and substantiate the best noise reduction practices for a specific airport. The study specifically examines the sensitivity of noise modeling results to realistic flight tracks (ADS-B data) for urban airports in Ukraine, focusing on both lateral (approach and departure stages) and vertical dispersion. Test cases are outlined to demonstrate the efficiency of the entropy-based optimization model.

6

Implementacja gry wirtualnej rzeczywistości z wykorzystaniem silnika Unity

Cieślicka Julia, Przybyłek Bartosz, Kazimierska-Drobny Katarzyna, Prokopowicz Piotr

Studia i Materiały Informatyki Stosowanej

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2025

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T. 17, nr 2

15--20

PL

W niniejszym artykule szczegółowo omówiono proces projektowania i implementacji gry wirtualnej rzeczywistości z wykorzystaniem silnika Unity oraz dodatkowych narzędzi programistycznych. Skupiono się na zagadnieniach technicznych, takich jak wykorzystanie XR Interaction Toolkit, Blender oraz Visual Studio, jednocześnie zwracając uwagę na wyzwania związane z projektowaniem ergonomicznego interfejsu i optymalizacji środowiska VR. Głównym celem pracy było stworzenie intuicyjnej i immersyjnej gry skierowanej do szerokiej grupy odbiorców, w tym osób nieposiadających wcześniejszego doświadczenia z wirtualną rzeczywistością. Wyniki pracy wskazują na duży potencjał technologii VRw kontekście edukacyjnym, rozrywkowym i przemysłowym.

EN

This article provides a detailed discussion of the processof designing and implementing a virtual reality game using the Unity engine and additional programming tools. The focus is placed on technical aspects, such as the use of XR Interaction Toolkit, Blender, and Visual Studio, while also addressing challengesrelated to designing an ergonomic interface and optimizing the VR environment. The main goal of the project was to create an intuitive and immersive game targeted at a wide audience, including individuals with no prior experience in virtual reality. The results of the work highlight the significant potential of VR technology in educational, entertainment, and industrial contexts.

7

Aplikacja webowa dla serwisu elektronicznego

Jaskulski Kacper, Zych Grzegorz

Studia i Materiały Informatyki Stosowanej

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2025

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T. 17, nr 2

48--54

PL

Aplikacja webowa dla serwisu elektronicznego stworzona z uwagi na rosnące zainteresowanie wśród Polaków elektroniką używaną. Moduł logowania na bazie tokenów i przypisanych im ról dostępu pracowników do systemu. Panel pracowniczy umożliwia tworzenie, edycję zleceń naprawy, tworzenie potrzebnych dokumentów np. faktur. Panel administracyjny daje dostęp do zakładek zarządzania danymi pracowników, edycji opisów i obrazów wyświetlanych na stronie, dodawanie dostępnych usług czy dostępnych części. Klient ma możliwość sprawdzenia stanu swojego zlecenia poprzez wpisanie danych w odpowiednim oknie. Aplikacja ma charakter trójwarstwowy tj. interfejs oparty o język js z nakładką React, Rest API wykonane w języku c# odpowiada za poprawne wykonywanie funkcji i komunikację z bazą danych Ms SQL 2022 Express. Testy zostały przeprowadzone z pomocą biblioteki Swagger oraz aplikacji PostMan i zakończyły się pomyślnie.

EN

A web application for an electronics service created due to the growing interest among Poles in used electronics. The login module is based on tokens and their assigned employee roles for system access. The employee panel allows for creating and editing repair orders, as well as creating necessary documents such as invoices. The admin panel provides access to employee data management tabs, editing descriptions and images displayed on the site, adding available services, and available parts. The client can check the status of their order by entering the relevant data in a dedicated window. The application has a three-tier architecture: a JavaScript interface with a React overlay, a Rest API written in C# responsible for proper function execution and communication with the Ms SQL 2022 Express database. Tests were conducted using the Swagger library and the PostMan application and were successfully completed.

8

Preparing commanders in a military organisation in the context of threats and security requirements

Sylwestrzak Bartosz

Scientific Journal of the Military University of Land Forces

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2025

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Vol. 57, No.2(216)

85--99

EN

Challenges caused by the destabilisation of the global security system and crises of both military and non-military nature in the modern world are forcing an innovative approach to personnel management in uniformed services responsible for internal security (i.e. public order and rescue services) as well as external security (military). Team leaders in these services should have specific qualifications and competencies in relation not only to the tasks they perform, but also to expectations and attitudes of the rest of society. The changes taking place in individual social groups, the professional mobility of society, the mixing of cultures and traditions mean that academic solutions for training and preparing officers and commanders to lead teams in such services should be thoroughly modified and supplemented with new solutions stemming from social needs and expectations.

PL

Wyzwania spowodowane destabilizacją systemu bezpieczeństwa światowego oraz kryzysami o charakterze militarnym i niemilitarnym we współczesnym świecie wymuszają nowatorskie podejście do zarządzania kadrami w służbach mundurowych, odpowiedzialnych za bezpieczeństwo wewnętrzne (tj. porządek publiczny, ratownictwo) oraz bezpieczeństwo zewnętrzne (militarne). Liderzy zespołów w tych służbach powinni legitymować się określonymi kwalifikacjami i kompetencjami w odniesieniu nie tylko do wykonywanych zadań, ale także w stosunku do oczekiwań i postaw pozostałej części społeczeństwa. Zmiany zachodzące w poszczególnych grupach społecznych, mobilność zawodowa społeczeństwa, mieszanie się kultur i tradycji powodują, że akademickie rozwiązania w zakresie szkolenia i przygotowywania oficerów oraz dowódców do kierowania zespołami w takich służbach powinny zostać gruntownie zmodyfikowane i uzupełnione o nowe rozwiązania wynikające z potrzeb i oczekiwań społecznych.

9

Wpływ zakresu napięcia ładowania kondensatora C-dump na parametry napędu SR

Rataj Daniel

Przegląd Elektrotechniczny

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2025

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R. 101, nr 3

111--114

PL

W artykule przedstawiono wyniki badań wpływu zakresu napięcia ładowania kondensatora w układzie C-Dump na parametry napędu z przełączalnym silnikiem reluktancyjnym (SRM). Badania przeprowadzono w określonych punktach pracy. Analizę oparto o dwa kryteria oceny: uzyskanie maksymalnej moc wyjściowej oraz uzyskanie maksymalnej sprawności napędu. Badania przeprowadzono metodą symulacji dla trójpasmowego silnika SRM o mocy 750 W, zasilanego napięciem sieciowym z układu typu C-Dump. Poprawność wyników obliczeń została zweryfikowana pomiarowo na stanowisku badawczym.

EN

The article presents the results of research on the impact of the capacitor charging voltage range in the C-Dump supply system on the performance parameters of a switched reluctance motor (SRM) drive. The study was conducted at defined operating points. The analysis was based on two evaluation criteria: achieving maximum output power and obtaining maximum drive efficiency. The research was carried out using simulation methods for a three-phase 750 W SRM powered by a mains voltage from a C-Dump system. The accuracy of the simulation results was verified experimentally on a test bench.

10

Using logistic mapping to determine the size of the set of autonomous vehicles in the monitored area

Więckowski Dariusz

Przegląd Elektrotechniczny

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2025

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R. 101, nr 3

281--285

EN

The work is related to the issue of collecting and processing data on the number and type of vehicles in the monitored area. Attention was paid to mobility not only on roads, but also in space, without traffic jams and stress and without a driver. It was noted that, regarding drivers, many publications refer to research related to their physical fitness, mental fitness, knowledge, skills and attitudes. Very often, a characteristic parameter is selected, i.e. reaction time (braking, avoiding obstacles). The paper presents a method for supporting the management of autonomous vehicle traffic organization. Issues such as maintaining an appropriate distance between vehicles to avoid collisions were taken into account, making it possible to achieve driving velocities appropriate to given traffic conditions. The attention was paid to maintaining a smooth ride by limiting acceleration and braking, which results in energy reduction, and at the same time it is possible to optimize the energy recovery process in the case of electric drives. For this purpose, a control and management model was proposed. Logistic mapping was used also for this purpose. The logistic mapping allows us to explain specific processes with planned flow parameters. A function describing the model was proposed. A model for analysing the growth of the vehicle fleet on a year-to-year basis over a 12-year period is presented. The model proposed in this work eliminates subjective issues because it refers to objects moving without the participation of the operator (driver). A stability criterion was proposed. A logistic mapping stability process was carried out.

PL

Praca dotyczy zagadnienia gromadzenia i przetwarzania danych o liczbie i rodzaju pojazdów na monitorowanym obszarze. Zwrócono uwagę na mobilność nie tylko na drogach, ale także w przestrzeni, bez korków i stresu oraz bez kierowcy. Zauważono, że w odniesieniu do kierowców wiele publikacji odwołuje się do badań związanych z ich sprawnością fizyczną, sprawnością psychiczną, wiedzą, umiejętnościami i postawami. Bardzo często wybierany jest charakterystyczny parametr, tj. czas reakcji (hamowanie, omijanie przeszkód). W artykule przedstawiono metodę wspomagania zarządzania organizacją ruchu pojazdów autonomicznych. Uwzględniono takie zagadnienia, jak utrzymanie odpowiedniej odległości między pojazdami w celu uniknięcia kolizji, co pozwala na osiągnięcie prędkości jazdy odpowiednich do danych warunków ruchu. Zwrócono uwagę na utrzymanie płynności jazdy poprzez ograniczenie przyspieszania i hamowania, co skutkuje redukcją energii, a jednocześnie możliwa jest optymalizacja procesu odzyskiwania energii w przypadku napędów elektrycznych. W tym celu zaproponowano model sterowania i zarządzania. Wykorzystano w tym celu mapowanie logistyczne. Mapowanie logistyczne pozwala na wyjaśnienie określonych procesów z zaplanowanymi parametrami przepływu. Zaproponowano funkcję opisującą model. Przedstawiono model do analizy wzrostu floty pojazdów w ujęciu rok do roku w okresie 12 lat. Model zaproponowany w tej pracy eliminuje kwestie subiektywne, ponieważ odnosi się do obiektów poruszających się bez udziału operatora (kierowcy). Zaproponowano kryterium stabilności. Przeprowadzono proces mapowania stabilności logistycznej.

11

Performance examination of CIGS thin-film photovoltaic system: a case study

Al-Ghzaiwat Mutaz, Sami Hamzeh, Avam Athuk Homam, As’ad Samer, Andruszkiewicz Artur, Alsaqoor Sameh

Przegląd Elektrotechniczny

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2025

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R. 101, nr 4

238--246

EN

This work conducts performance analysis on a thin-film based photovoltaic (PV) solar system located on the Middle East University (MEU) campus in Jordan. The analysis includes gauging the performance of the PV system using established industry performance parameters, and studying the energy production trends. After investigating different aspects affecting the PV solar system such as the PV modules temperature losses and component availability, several causes of low energy output are hypothesized and discussed. Afterwards, a new PV system that relies on crystalline silicon technology was proposed and designed with proper system components along with an economic feasibility study. The new system is designed to provide a comparison to the currently installed system under the same site conditions and to be presented as a future project proposal for the university to pursue. As a result, we have found that the performance ratio of the new proposed PV solar system is five times higher in comparison with the currently installed system.

PL

W tej pracy przeprowadzono analizę wydajności cienkowarstwowego systemu fotowoltaicznego (PV) zlokalizowanego na terenie kampusu Middle East University (MEU) w Jordanii. Analiza obejmuje pomiar wydajności systemu PV przy użyciu ustalonych parametrów wydajnościowych branży oraz badanie trendów produkcji energii. Po zbadaniu różnych aspektów wpływających na system PV, takich jak straty temperatury modułów PV i dostępność komponentów, wysunięto hipotezę i omówiono kilka przyczyn niskiej wydajności energetycznej. Następnie zaproponowano i zaprojektowano nowy system PV, który opiera się na technologii krzemu krystalicznego, z odpowiednimi komponentami systemu wraz ze studium wykonalności ekonomicznej. Nowy system ma zapewnić porównanie z obecnie zainstalowanym systemem w tych samych warunkach na miejscu i zostać przedstawiony jako przyszła propozycja projektu, którą uniwersytet będzie mógł realizować. W rezultacie odkryliśmy, że współczynnik wydajności nowego proponowanego systemu PV jest pięć razy wyższy w porównaniu z obecnie zainstalowanym systemem.

12

Experimental and Numerical Investigation of the Stiffness of the FPR Composite Mast of an A-Class Catamaran (A-Cat) with Sensitivity Analysis

Ferenc Tomasz, Mikulski Tomasz

Polish Maritime Research

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2025

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nr 4

132--141

EN

The paper presents an experimental and numerical investigation of the stiffness of an A-class catamaran (A-Cat) mast. The structure has a constant, prismatic cross-section and is made from fibre-reinforced plastic (FRP) multilayered laminate. The material parameters of the structure were identified. Then, static tests were conducted using a simply supported beam configuration, where supports were established at the beginning of the mast length and at the rigging attachment point. A computational model of the mast was created and analysed using the finite element method (FEM). A sensitivity analysis was performed on a validated model, from which sensitivity coefficients were obtained. On this basis, it was possible to determine how the structure could be modified to obtain the expected deformation, i.e. the maximum displacement of a selected point on the mast or the shape of the mast bending under a given load.

13

Prawne aspekty organizacji budowy lub przebudowy dróg publicznych spowodowanych inwestycjami prywatnymi

Pernal Arleta, Harat Andrzej

Polish Journal of Materials and Environmental Engineering

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2025

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Vol. 9 (29)

23--32

EN

The development and implementation of road and transport infrastructure is not always a goal in the public interest. Private entities implementing their own projects are frequently interested in the possibility of building new road sections or adapting the existing road systems to their own plans and transport needs. The existing regulations contained in art. 16 of the Public Roads Act and the Civil Code enable cooperation in this field between road managers and private investors, offering numerous benefits to the parties that enter into mutual agreement in this matter, but also imposing on them certain obligations. The agreements in question may constitute one of the factors promoting a dynamic development of administrative units and enabling the construction of housing estates, office buildings, commercial facilities, warehouses, logistics centers and many other facilities in areas without a convenient road system. Everything is done in cooperation with public administration bodies. Naturally, the process of preparing, implementing and managing a construction project is a complicated and difficult issue. The current circumstances of economic, resource and material uncertainty may pose a significant threat to the implementation of a construction project. Nevertheless, a factor necessary to achieve satisfactory goals is mutual involvement of the parties in the appropriate preparation of the project, as well as finding an optimal solution that does not place an excessive financial burden on the private investor and, at the same time, guarantees the achievement of the assumed goal.

14

Ocena stanu troficznego wód zbiornika Tresna na podstawie stężenia chlorofilu

Jachniak Ewa, Wilman Marek

Polish Journal of Materials and Environmental Engineering

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2025

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Vol. 9 (29)

39--50

EN

The aim of this research was to assess the state of eutrophication of the Tresna dam reservoir. Knowledge of the degree of eutrophication of the reservoir water is very important, because water with a high degree of eutrophication is often unsuitable for use (especially recreational and water supply). The trophic state was determined based on chlorophyll a concentrations. In addition, the species composition of planktonic algae in the reservoir water was also analyzed in the summer period. The water samples for research were taken during the vegetation season in 2023 year during 5 months (from May to September) from two research points – T1 (the beach area in Zarzecze) and T2 (the area of the dam in Tresna). Chlorophyll a concentrations in the area of the beach in Zarzecze exceeded the lower limit values for mesotrophy for most of the study period. In turn, in May and August, they indicated the eutrophic nature of the reservoir water. The average concentration of chlorophyll a in the study period in this region (7.24 μg/dm3) indicates the mesotrophic character of the water. In turn, chlorophyll a concentrations at the research site in Tresna (near the reservoir dam) were more variable during the research period and they indicated a state from oligotrophy to eutrophy. The average chlorophyll a concentration (5,27 μg/dm3) while allowed to classify the water of this region as mesotrophic. The dominant taxa of algae in the water samples were Fragilaria crotonensis, Asterionella formosa (diatoms), Pediastrum duplex and Gloeotil-la (green algae) and Ceratium hirundinella (dinoflagellates). The numerous presence of Fragi-laria crotonensis and Asterionella formosa in the samples may indicate an increase in the level of eutrophication, because they live in large numbers in eutrophic water and sometimes creating blooms. In turn, the presence of the dinoflagellate Ceratium hirundinella may confirm a more temporarily moderate the level of fertility in the reservoir water and a small amount of organic compounds.

15

Quantum key distribution-as-a-service for end-to-end security in multi-orchestrated 6G networks

Lasota Mikołaj, Batalla Jordi Mongay, Sujecki Sławomir, Ahmadian Azadeh, Pajewski Łukasz, Kolenderski Piotr

Opto-Electronics Review

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2025

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Vol. 33, No. 3

art. no. e155875

EN

This paper introduces quantum key distribution-as-a-service (QKDaaS) to address the end-to-end security challenges posed by the involvement of multiple orchestrators in 6G networks. These networks require seamless coordination of processes from endpoints to services, with tiered components supporting data-driven and cross-layer predictive procedures. While multi-party (spanning multiple domains, tenants, and providers) enhances local security through advanced controls, it also complicates the implementation of an end-to-end security framework that is essential for mobile network operators. To address this issue, we propose QKDaaS, a secure platform that leverages a fibre transport network for credential and encryption key distribution in multi-party environments. The solution uses wavelength multiplexing to integrate quantum and classical channels within a single fibre. Both C-band and O-band quantum channels are considered, with classical communication in the C-band. The simulation results show that with the currently available experimental setup and mobile network requirements, secure keys can be generated for distances approaching 100 km in the C-band and 60 km in the O-band case. This means that QKDaaS can be deployed in mobile network operators’ current transport infrastructures.

16

Comparison of different methods of extinguishing of the group A fire

Drzymała Tomasz, Mortka Piotr, Gałaj Jerzy

Materiały Budowlane

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2025

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nr 7

202--212

EN

The article presents a comparative analysis of various methods used in practice to extinguish group A fires in terms of their effectiveness and usefulness. The scope of the article includes performing tests of extinguishing group A fires, in accordance with the available methods discussed in Polish Standards. During the tests, various means were used to combat group A fires, including: ABC powder in a fire extinguisher and water supplied as a mist. Additionally, sprays, blankets and fire extinguishing sheets were used, as well as sorbent and CO2 and BC powder extinguishers. All tests were performed in accordance with the conditions of the PN-EN 3-7:2004+A1:2008 standard. This allowed obtaining comparable results. During the tests, the extinguishing effectiveness of water in the form of mist, extinguishing spray and ABC powder was confirmed. As an alternative extinguishing method, the best proved to be the application of a sheet and fire blankets, which effectively cut off the oxygen supply. The use of CO2 and BC powder extinguishers allowed for the delay of wood burning. The remaining extinguishing agents were ineffective as they did not fully extinguish the fire.

PL

W artykule przedstawiono analizę porównawczą różnych sposobów gaszenia pożarów grupy A stosowanych w praktyce pod względem ich skuteczności i przydatności. Zakres artykułu obejmuje badania gaszenia pożarów grupy A, zgodnie z dostępnymi metodami omówionymi w Polskich Normach. Podczas badań wykorzystane zostały różne środki mające na celu zwalczanie pożarów grupy A, m.in.: proszek ABC w gaśnicy oraz woda podawana jako mgła. Dodatkowo zastosowano spraye, koce i płachty gaśnicze, a także użyto sorbentu i gaśnic na CO2 oraz proszkowych BC. Wszystkie badania wykonano z zachowaniem warunków zgodnych z normą PN-EN 3-7:2004+A1:2008. Pozwoliło to na otrzymanie porównywalnych wyników. Podczas badań potwierdzono skuteczność gaśniczą wody w postaci mgły, sprayu gaśniczego oraz proszku ABC. Jako alternatywna metoda gaśnicza najlepiej sprawdziło się nakładanie płachty i koców gaśniczych, które skutecznie odcinały dopływ tlenu. Zastosowanie gaśnic na CO2 oraz gaśnic proszkowych BC spowodowało opóźnienie palenia się drewna. Pozostałe środki gaśnicze były nieskuteczne, ponieważ nie ugasiły w pełni pożaru.

17

Solving the Problem of Large Construction Safe Operation

Panda Anton, Nahornyi Volodymyr, Shcherbina Sergey, Mostovoy Vasily

Management Systems in Production Engineering

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2025

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nr 4 (33)

525--530

EN

Bridge construction has a significant amount of data on the periods of trouble-free operation of bridges of various designs and purposes. These data serve as a reliable basis for developing schedules of planned preventive inspections and repairs of bridge structures. However, the statistical nature of this information does not exclude the occurrence of seemingly unpredictable events (destruction of the road surface, loss of stability and destruction of the load-bearing elements of the bridge structure). These events usually occur suddenly, although this is only an external manifestation of hidden processes that occur naturally in the structure up to a certain point in time starting from the moment it is put into operation. To outline these processes, the presented article proposes to describe the bridge structure as a dynamic system developing in an “acute mode”. The mathematical model describing such a dynamic system contains a parameter equal to the time coordinate when a radical change in the law of development of the controlled dynamic system occurs. The testing of the bridge life using forecasting methodology was carried out on the example of a cable-stayed bridge and confirmed its effectiveness.

18

Possibilities of Increasing the Efficiency of Production Systems by Using an Additional Capacitive Element

Michlowicz Edward

Management Systems in Production Engineering

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2025

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nr 3 (33)

393--400

EN

The continuity of the flow of materials needed for correct operation of manufacturing systems can be achieved using different means and control methods. These objectives can be achieved through the use of Total Productive Maintenance (TPM). Specific effects can also be achieved by using additional capacitive elements in device systems (manufacturing lines). In this paper to be considered is a system with a serial structure and an additional capacitive element (the position within the system and the capacity of the element are determined). The capacitive element divides the system into two subsystems: the part delivering the material to the buffer (DP) and the part receiving the material (RP). The time lost due to unplanned interruptions in the operation of the production system equipment is described by the MTTR (Mean Time to Repair) indicator. The analysis of the system’s operation used the failure index, which is directly related to the MTTR index. To study the system, a method involving the analysis of states and a digital simulation are used. To assess the system with an additional capacitive, a production performance indicator is used. The obtained results allow for conclusions on the possibilities for improving the effectiveness of manufacturing systems using the proposed method.

19

Improvement of Thermophysical Characteristics of Polymer Coatings for Protecting Water Transport by Using a Mixture of Discrete Organic Fibers

Sapronov Oleksandr, Buketov Andriy, Sapronova Lyudmila, Mokiy Oleksandr, Vorobiov Pavlo, Banha Mykhailo, Straka Ľuboslav

Management Systems in Production Engineering

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2025

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nr 4 (33)

576--585

EN

This work presents the technological aspects of the reinforcement of the thermosetting binder to improve the thermophysical characteristics of polymeric materials and protective coatings based on them. Epoxy binder ED-20 was used to form polymer materials, which were polymerized with polyethylene polyamine (PEPA) in the ratio: 100 parts by weight of ED-20 epoxy oligomer and 10 parts by weight of PEPA hardener. A mixture of discrete organic fibers with the content of q = 0.25-2.00 wt.% was used to improve the thermophysical properties of polymer materials. The key parameters for determining the temperature range for the future operation of the designed composite materials without changing their properties were defined by thermogravimetric analysis (TGA) and differential thermal analysis (DTA). The maximum temperature of the mass loss beginning is Т0 = 624.0°K; the relative mass loss is εm = 65.7%; the initial temperature of the exoeffect is Тn = 475.5°K; and the maximum temperature of the exoeffect peak is Tmax = 545.5°K. The mathematical calculation of the activation energy of thermal destruction was performed to determine the resistance to the degradation of chemical bonds under the temperature influence. It has been proven that composites filled with a discrete organic fiber mixture with the content of q = 0.75 wt.% are characterized by the maximum activation energy (Ea = 167.2 kJ/mol), which indicates the thermal stability of reinforced composites.

20

Wzloty i upadki. Czyli o marzeniach na huśtawce, kosztach, w tle o UR lub jego braku

Nowicki Ryszard

Kierunek Chemia

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2025

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Nr 1

100--102

PL

Im inwestycja większa, tym trudniej ją precyzyjne zaplanować, a do tego planiści zbyt często podchodzą do kosztów zbyt optymistycznie, co może być konsekwencją różnych przyczyn. Przyjrzyjmy się kilku przykładom.