Wyniki wyszukiwania - BazTech

1

Value in short food supply chains

Domagała Wojciech, Zawadzki Wojciech

Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska

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2025

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z. 218

127--147

EN

Purpose: This study examines consumer preferences in Short Food Supply Chains (SFSCs) to identify key factors influencing purchasing decisions. The research aims to bridge the gap in understanding consumer-perceived value in SFSCs and provide practical insights for producers and policymakers. Design/methodology/approach: The study employs Q-methodology, integrating quantitative and qualitative analysis, to classify consumer viewpoints. A structured survey was conducted among 340 Polish consumers from the Małopolska and Mazowieckie regions who actively purchase via SFSCs. Principal Component Analysis (PCA) was applied to identify distinct consumer perspectives. Findings: The analysis reveals five consumer viewpoints regarding SFSCs. The most critical purchasing factors are food quality, freshness, and safety, followed by local patriotism. Convenience is moderately important, while direct relationships with producers are ranked lower. The study suggests that marketing efforts should focus on quality assurance, certification, and local product origin, rather than emphasizing producer-consumer interactions. Research limitations/implications: This study focuses on two Polish regions, which may limit the applicability of its findings to other areas or populations. Selection bias may arise, as only active SFSCs consumers were surveyed, excluding those deterred by price or convenience. Future research should explore broader demographics, regional differences, and alternative SFSC models, including digital platforms. Practical implications: Producers should emphasize product freshness, safety, and local sourcing in marketing strategies. Expanding distribution options (e.g., home delivery, subscription boxes) could attract convenience-driven consumers. Certification and quality labels can enhance consumer trust and support premium pricing. Originality/value: This study provides a novel application of Q-methodology to SFSC consumer analysis. Unlike prior studies, it offers a data-driven segmentation of consumer motivations, guiding businesses toward strategic marketing and distribution improvements to enhance SFSC viability. Furthermore, the study expands the understanding of consumer trust, ethnocentric purchasing behavior, and value perception in SFSCs, offering actionable insights for both producers and policymakers aiming to strengthen local food systems.

2

Digital skills in selected European Union countries in the context of digital exclusion

Grzenkowicz Alicja

Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska

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2025

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z. 218

271--295

EN

Purpose: The purpose of this paper is to analyse the key factors of the digital exclusion in selected European Union countries. Specifically, it examines the economic, social, and demographic determinants that shape digital accessibility and digital literacy in these nations. Design/Methodology/Approach: This study analyses the factors associated with the level of digital skills, as measured by the DSI indicator, which is considered a key representation of digital exclusion. The analysis covers the 27 European Union countries from 2014 to 2023, enabling the identification of trends and changes over the examined period. Furthermore, correlations between the DSI levels and selected factors are investigated to determine the primary determinants of digital exclusion. Findings: Significant variation in digital skill levels and the factors influencing them was observed across European Union countries. Strong correlations were identified between digital skills, GDP, and the level of education (both formal and informal). Additionally, the average age of the population was found to be a negative factor, which, in the context of aging societies, may play a crucial role in shaping future policies aimed at promoting digital inclusion for this demographic group. Research Limitations/Implications: The conducted study provides a starting point for further analysis using a cross-sectional and temporal approach, focusing on digital exclusion in Europe. Practical Implications: The results of the study have facilitated the identification of socio- economic factors associated with digital exclusion in European Union countries. These findings highlight key areas that require targeted action by policy-makers, particularly in addressing social inequalities and the digital marginalization of certain demographic groups. Social Implications: The studies highlight the need for comprehensive education to develop key digital skills, enabling individuals to engage effectively and safely with the digital transformation of society and to prevent digital exclusion. They also indicate that, despite significant advancements in the availability of Internet technology over the years, digital exclusion remains unresolved, pointing to various underlying determinants of this issue. Originality/Value: The paper identifies the factors associated with digital exclusion and provides recommendations for actions aimed at reducing digital inequality.

3

Analysis of intentions to use the deposit system in Poland pilot studies

Zdonek Iwona, Zdonek Dariusz, Hysa Beata

Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska

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2025

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z. 216

631--645

EN

Purpose: The purpose of the article was to develop and validate scales that measure factors influencing intentions to use the deposit system, and then examine the determinants of these intentions. The scales were developed based on the Theory of Planned Behavior. Design/methodology/approach: Scale items were developed based on the literature analysis, and then each scale was validated based on questionnaire surveys. Validation was carried out based on Confirmatory Factor Analysis. In addition, based on structural equation modelling, a pilot analysis was conducted to validate the hypotheses regarding the influence of factors derived from the Theory of Planned Behavior on intentions to use the deposit system in Poland. Findings: Due to the complexity of factors resulting from the theory of rational behavior, it was necessary to develop eight measurement scales. Based on the research, six multi-item scales and two single-item scales were established that meet the criteria of convergent and discriminant validity. Pilot verification of the hypotheses allowed us to state that: 1) attitudes and social norms are significant factors determining the intention to use the deposit system, 2) ecological awareness is a significant factor determining attitudes towards the deposit system and social pressure to use this system, 3) convenience significantly affects the perceived control associated with using the deposit system. Research limitations/implications: The research presented in the article should not be generalized to the entire population due to its pilot nature. The sample of respondents participating in the research is not representative of the Polish population. Practical implications: The questionnaire and measurement scales proposed in the article can be used to study the factors determining the use of the deposit system in targeted studies on a larger and representative sample. Social implications: The article is relevant to research on factors influencing the use of plastic packaging in the food and beverage industry consistent with the circular economy. Originality/value: The article's novelty is the presentation of scales measuring the factors determining the use of the deposit system in Poland.

4

Prediction of school travel mode choice and its determinants – a machine learning approach

Ali Mujahid, Yuen Choon Wah

Transport Problems

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2025

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T. 20, z. 2

125--137

EN

Prediction of travel mode choice (TMC) is crucial for urban planners and policymakers to promote sustainable transportation systems and reduce traffic congestion. In recent decades, the prediction of TMC to schools, which involves daily commuting, has attracted the interest of researchers in green urban planning and a better society. Statistical models are based on many unrealistic premises about the data distribution and are typically used to perform mode choice analysis, which might result in biased model predictions. Moreover, machine learning algorithms that are assumption-free can handle complex, imbalanced, and multiclass datasets with high interpretability and outperform conventional techniques; thus, they have received much attention. Therefore, the present study intends to use modern techniques, such as Naďve Bayes, random forest, gradient boost, support vector machine, and linear regression, to predict the TMC to school (highest level of education) and its influencing factors. The current study contributes to the existing literature through (1) the application of modern techniques for the prediction of school TMC, (2) feature importance to predict the most significant feature of school TMC, (3) a proposal of the best predictive model, and (4) a discussion of the effectiveness of modern techniques over traditional methods. A total of 2756 samples from the NextGen 2022 National Household Travel Survey – California dataset was utilized to predict school TMC and its influencing factors. Based on the predictions, it was found that gradient boost outperformed other machine learning models with an accuracy of 98.9% in training and 83% in testing. Moreover, random forest achieved an accuracy of 77.8% and 71.1% in training and testing. Based on the sensitivity analysis, it was found that age is the most significant factor in determining the TMC to school, followed by the type of school. The findings will help policymakers and can be used to better understand modeling TMCs to schools, promoting sustainable transportation options.

5

Evaluation of the total cost of charging electric vehicles through dedicated photovoltaic installations

Sendek-Matysiak Ewelina

Transport Problems

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2025

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T. 20, z. 2

59--71

EN

Currently, the share of BEVs (Battery Electric Vehicle) in the automotive market in Poland is relatively small - 0.1%. That is caused by a number of barriers; one of them being the undoubted fact that BEVs are exceptionally expensive. Electric Vehicle enthusiasts express the opinion that the cost is offset by reduced running costs, in particular in cases where the electricity is generated from a photovoltaic (PV) installation. This article determines the cost of charging a battery electric vehicle with an electricity generated from a domestic photovoltaic installation consisting of various numbers of modules. The optimal yield of electricity generated by PV was determined, and then the charging costs in the current conditions in Poland. It was assumed that the electricity produced would be used exclusively for BEV charging, with the surplus sold to the power grid. The analysis shows that even for the maximum number of photovoltaic modules which can be installed on the study area, in some months the battery electric vehicle charging costs will not be zero. The issue related to the cost of charging BEVs with PV - generated electricity in the Polish conditions has not yet been addressed in any scientific publication and its problems concerning the issues may provide a source of preliminary analysis for other countries.

6

Romanian Maritime Ports in the Digital Transformation Era: The Shift from Fourth-Generation to Smart Ports and the Impact on the Global Logistics Ecosystem

Burmambet Alev

TransNav : International Journal on Marine Navigation and Safety of Sea Transportation

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2025

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Vol. 19 No. 1

125--133

EN

Romanian maritime ports play a pivotal role in the national and regional economy, acting as crucial logistical and commercial hubs in the Black Sea region. This study investigates the ongoing digital transformation of these ports, focusing on the shift from traditional fourth-generation ports to innovative smart ports. It examines the challenges, opportunities, and strategies employed in this transformation, emphasizing the integration of cutting-edge technologies such as automation, digitalization, and green innovations. In light of global trends in the logistics sector, alongside the increasing demand for efficiency, sustainability, and resilience, the research highlights how these advancements contribute to enhancing the operational performance of Romanian ports. Furthermore, the study explores the broader implications of this transition on the global logistics ecosystem, analyzing its potential to improve connectivity, reduce environmental impact, and stimulate economic growth. By evaluating the evolution of Romanian maritime ports over the past two decades, the study offers strategic insights into how these ports can evolve into intelligent, sustainable transport hubs capable of meeting the future demands of a globalized and environmentally conscious supply chain.

7

Lifetime Corrosion Loss of Bulk Carriers

Momčilović Nikola, Kovač Nataša, Ivošević Špiro

TransNav : International Journal on Marine Navigation and Safety of Sea Transportation

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2025

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Vol. 19 No. 1

243--249

EN

This paper analyzes the total steel replacement due to corrosion degradation in four Handymax-class bulk carriers, based on corrosion measurements recorded throughout their operational lifespan. Each ship was divided into 11 lightship mass subgroups, enabling detailed examination of cumulative lifetime corrosion losses for both entire ships and individual subgroups. Utilizing similar ship data obtained from the shipyard, the study also provides estimations of the total steel weights of each of lightship subgroups. The findings offer valuable insights into the overall aging effects on ship structures, crucial for maintenance planning, structural integrity assessments, and recycling, especially from the perspective of sustainable shipping. Additionally, the estimated weights of lightship subgroups can serve as reference data for preliminary ship design, aiding in the estimation of lightship weights and potential steel loss due to corrosion.

8

Properties of Slag-Based Geopolymer-Stabilized Indian Lithomargic Soil Using Sugarcane Bagasse Ash for Sustainable Pavement Design

Marathe Shriram, Nieświec Martyna, Bhat Arun Kumar, Shetty Srinath

Studia Geotechnica et Mechanica

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2025

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Vol. 47, nr 1

36--47

EN

This investigation examines the feasibility of stabilizing lithomargic soil subgrades through the utilization of geopolymerized slag (GGBS) and sugarcane bagasse ash (SCBA). Through a series of compaction experiments, the best dry density was obtained by maintaining a constant slag dosage of 10% by weight of the soil while altering the dosage of SCBA. The geopolymeric aqueous solution is produced by combining water glass (Na2SiO3) and caustic soda (NaOH). The soil mixtures were subjected to both unstabilized and stabilized UCS and CBR experiments. The experiments suggest that the strength of subgrade soil enhances with the inclusion of SCBA up to a specific threshold (i.e., 15%), after which it decreases due to a constant dosing of slag. In order to comprehend the hardening performance subsequent to geopolymer stabilization, the microstructural analysis is implemented. The establishment of co-relationships among the strength parameters (UCS and CBR) facilitated the formulation of a simple linear regression model in order to comprehend the relationship among the strength parameters of geopolymer-stabilized lithomargic soil. The long-term effectiveness of mechanical performance was disclosed by the boost of strength performance, as evidenced by the prolonged CBR and UCS achievement. This study also suggests a pavement design that adheres to the Indian Roads Congress principles for low-volume roadways, which results in a substantial reduction (45%) of entire pavement thickness while maintaining performance. The economic benefits of geopolymer stabilization in rural pavement construction were revealed through a comprehensive cost analysis that compared the conventional and modified pavement designs while also maintaining the sustainability element.

9

Advantages of using ultra-high-performance concrete (UHPC) link slabs as an alternative to dowel bar joints in rigid road surfaces

Al-Jelawy Haider M., Kinaine Alaa Faisal, Mousa Mohammed Abbas, Muhaisin Muthana Hussein

Roads and Bridges - Drogi i Mosty

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2025

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Vol. 24, no. 1

69--101

EN

The presented experimental study evaluates the possibility of replacing rigid pavement joints by a link slab made of ultra-high-performance concrete (UHPC) and shows advantages of it. Connection between the link slab and the pavement is provided by using shear studs. The tests focusing on evaluation of the load-deflection performance of UHPC link slabs was done using full-scale models. Twelve model structures containing UHPC link slabs were fabricated, tested and compared with specimens containing steel dowel bars. Parameters investigated in this study included link slab length and thickness, the number of shear studs, and joint width. The experimental results showed less deflection at the joint face, especially when the link slabs were 450 mm long and 70 mm thick, displaying a reduction in deflection by 47.46%-61.54% compared with steel dowel joint, at the load of 60 kN. Moreover the UHPC link slab ultimate load and relative deflection were more sensitive to changes in link slab thickness and length. Compared with model including shear stud connector, the ultimate load increased by 38.24%-88.52% and the relative deflection RD decreased by 56.12%-81.81% when the UHPC link slab was 450-mm-long and 70-mm-thick. Load transfer efficiency LTE of specimens with UHPC link slabs was slightly greater than that of specimens with dowel bars, which was in the range of 70%-90%. The values of LTE were more advantageous when two shear studs were used instead of one shear stud on each side. Mode of failure of specimens with UHPC link slabs consisted in shearing or flexural cracking near the joint region. The study indicated that UHPC link slabs could be a superior substitute for the traditional steel dowels in rigid pavements.

PL

W artykule przedstawiono wyniki eksperymentu badawczego polegającego na zastąpieniu stalowych dybli jako łączników betonowych płyt zwykłych w sztywnych nawierzchniowych drogowych, płytami łącznikowymi z betonu o bardzo wysokiej wytrzymałości UHPC (ang. ultra high performance concrete). Do połączeń płyt łącznikowych UHPC z sąsiednimi płytami z betonu zwykłego zastosowano ścinane dyble. Badania realizowano na modelach naturalnej wielkości. Celem eksperymentu było określenie charakterystyki obciążenie-przemieszczenie dla płyt łącznikowych z betonu UHPC. Wykonano dwanaście stanowisk z próbkami zawierającymi betonowe płyty nawierzchni sztywnej połączone płytą z betonu wysokowartościowego UHPC, zróżnicowaną w układzie pod względem długości, grubości płyty, liczby dybli ścinanych oraz szerokości szczeliny złączeniowej. Wyniki przeprowadzonych eksperymentów obciążeniowych płyty z betonu UHPC porównano odpowiednio z wynikami testów na próbkach zawierających jako łączniki stalowe dyble. Na podstawie przeprowadzonych badań wyznaczono dla każdego stanowiska badawczego krzywe obciążenie-przemieszczenie uwzględniając przy tym różne konfiguracje wymiarów płyty łącznikowej UHPC. W przypadku połączeń płyt betonowych z wykorzystaniem jako łączników płyty UHPC wykazano ich mniejsze ugięcie pod wpływem obciążenia monotonicznego (szczególnie w pobliżu krawędzi łączenia) niż przy zastosowaniu do tego celu stalowych dybli. Dla płyt łącznikowych UHPC o długości 450 mm i grubości 70 mm, przy obciążeniu 60 kN, odnotowano mniejsze ugięcie o 47,46-61,54% w porównaniu do połączenia płyt stalowymi dyblami. Nośność graniczna i ugięcie względne płyty łącznikowej wykonanej z betonu UHPC wykazywały większą podatność na zmiany zarówno jej grubości jak i długości. W porównaniu do próbek zawierających połączenia płyt za pomocą dybli, w przypadku płyty łączącej z betonu UHPC o długości 450 mm i grubości 70 mm jej nośność graniczna wzrosła o 38,24%-88,52%, a ugięcie względne RD zmniejszyło się o 56,12-81,81%. Wskaźnik efektywności przenoszenia obciążenia LTE dla stanowisk zawierających płyty łącznikowe z betonu UHPC był nieco wyższy niż w przypadku próbek zawierających połączenia dyblowe i mieścił się w zakresie 70-90%. Wartości tego wskaźnika były korzystniejsze w przypadku zastosowania dwóch łączników ścinanych zamiast jednego po każdej stronie płyty. Mechanizm zniszczenia próbek zawierających płyty łącznikowe z betonu UHPC uwzględniał ścinanie lub zginanie płyt w pobliżu krawędzi łączenia. Badanie wykazało, że płyty łącznikowe z betonu UHPC mogą być alternatywnym rozwiązaniem do zastosowania w sztywnych nawierzchniach betonowych w stosunku do tradycyjnych połączeń stalowymi dyblami.

10

Zastosowanie zielonej technologii chemicznej w inżynierii chemicznej i technologii : wkład w zrównoważony rozwój i cel koncepcji „dual-carbon” w Chinach

Xiaoyun Wu, Hui Zhao, Kesi Lin

Przemysł Chemiczny

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2025

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T. 104, nr 4

481--485

PL

Przegląd podstawowych pojęć i wymogów zrównoważonego rozwoju w warunkach chińskich wraz z 12 odniesieniami literaturowymi. Przeanalizowano konkretne zastosowania, funkcjonalność i wartości zielonej technologii chemicznej. Uwzględniono również dobór surowców i katalizatorów, czystą produkcję, optymalizację procesów biotechnologicznych i ochronę środowiska.

EN

A review, with 12 refs., of fundamental concepts and requirements of sustainable development under Chinese conditions. Specific applications, functionalities, and values of green chem. technol. were examd. Selection of raw materials and catalysts, clean prodn., biotechnol. process optimization and environmental protection were also taken into consideration.

11

Zrównoważony rozwój przemysłu w erze cyfrowej: nowe wyzwania i perspektywy dla inżynierów

Biegasiewicz Piotr

Przegląd Techniczny : Gazeta Inżynierska

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2025

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nr 3

24--27

PL

Zrównoważony rozwój opiera się na trzech filarach: dążeniu do wzrostu gospodarczego, poszanowaniu środowiska naturalnego oraz zapewnieniu dobrostanu społeczeństwa. W sytuacji postępującej cyfryzacji i automatyzacji oraz urbanizacji istnieje konieczność poszukiwania innowacyjnych rozwiązań, które będą jednocześnie opłacalne ekonomicznie i przyjazne dla środowiska. Inżynierowie pełnią w tych poszukiwaniach kluczową rolę.

EN

Sustainable development is based on three pillars: pursuing economic growth, respecting the environment and ensuring the well-being of society. With increasing digitalisation and automation and urbanisation, there is a need to search for innovative solutions that are both economically viable and environmentally friendly. Engineers play a key role in this search.

12

Górnictwo w erze ESG. Nowe możliwości dla innowacji

Kruczek Mariusz, Bondaruk Jan

Przegląd Górniczy

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2025

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T. 82, nr 1-2

143--149

PL

Sektor górniczy w Polsce stoi przed wyzwaniami transformacji energetycznej, regulacji UE i rosnącej presji na zrównoważony rozwój. Zasady raportowania niefinansowego ESG (Environmental, Social, Governance) stały się kluczowym narzędziem restrukturyzacji, integrując aspekty środowiskowe, społeczne i zarządcze w strategiach podmiotów współtworzących łańcuch wartości sektora górniczego. W artykule omówiono rolę ESG w polskim górnictwie i znaczenie GIG-PIB w transformacji sektora. Przedstawiono wyzwania związane z redukcją emisji gazów cieplarnianych, rekultywacją terenów pogórniczych i wdrażaniem innowacyjnych technologii. Wskazano na konieczność długofalowej strategii ESG oraz współpracy sektora przemysłowego, naukowego i administracji publicznej w skutecznej transformacji branży.

EN

The Polish mining sector faces challenges related to energy transition, EU regulations, and growing sustainability pressures. ESG (Environmental, Social, Governance) has become a key restructuring tool, integrating environmental, social, and governance aspects into mining strategies. This article discusses ESG's role in Polish mining and the importance of GIG-PIB in the sector's transformation. It examines challenges such as greenhouse gas emission reduction, post-mining land reclamation, and implementing innovative technologies. The need for a long-term ESG strategy and collaboration among industry, research, and public administration to ensure effective transformation is highlighted.

13

Economic evaluation of environmental protection activities in the context of sustainable development: the experience of Ukraine

Kaletnik Grygorii, Sakhno Andrii, Pryshliak Natalia, Lutkovska Svitlana, Kolomiiets Tetiana

Polityka Energetyczna

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2025

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T. 28, z. 3

217--236

EN

This paper explores the challenges of economically evaluating environmental protection measures, emphasizing their role in shaping sustainable national economic development. These measures contribute to ecological safety, quality of life, and economic growth while conserving natural resources. Effective economic evaluation ensures long-term benefits from ecosystem preservation and sustainable resource use. The study proposes evaluating efficiency using indicators like service payment costs, current expenses, and the volume of services rendered. Using the coefficient method, the analysis focuses on Ukraine and calculates ratios of payment and current expenses to service volume. Findings show that only the water supply, sewage, and waste management sectors fully offset their costs through services rendered. In other sectors (construction, finance, public administration, defense), only partial cost recovery occurs. An environmental functional analysis method was also applied, assessing efficiency by comparing service volume to costs. A total efficiency coefficient was calculated against inefficiency metrics, revealing sector-specific trends and cost-related drivers. The paper highlights the importance of adjusting costs when higher service volumes are unattainable, ensuring more accurate efficiency assessments. While grounded in Ukraine’s context, the findings are relevant to EU countries prioritizing sustainable development. Applying these methods across the EU could support more effective, adaptable strategies for economic evaluation of environmental protection and advance the implementation of ecologically sustainable economies.

PL

W niniejszym artykule omówiono wyzwania związane z ekonomiczną oceną środków ochrony środowiska, podkreślając ich rolę w kształtowaniu zrównoważonego rozwoju gospodarczego kraju. Środki te przyczyniają się do bezpieczeństwa ekologicznego, jakości życia i wzrostu gospodarczego, jednocześnie chroniąc zasoby naturalne. Skuteczna ocena ekonomiczna zapewnia długoterminowe korzyści wynikające z ochrony ekosystemów i zrównoważonego wykorzystania zasobów. W badaniu zaproponowano ocenę efektywności przy użyciu wskaźników takich jak koszty płatności za usługi, bieżące wydatki i wolumen świadczonych usług. Wykorzystując metodę współczynników, analiza koncentruje się na Ukrainie i oblicza stosunek płatności i bieżących wydatków do wolumenu usług. Wyniki pokazują, że tylko sektory zaopatrzenia w wodę, kanalizacji i gospodarki odpadami w pełni pokrywają swoje koszty poprzez świadczone usługi. W innych sektorach (budownictwo, finanse, administracja publiczna, obrona) następuje tylko częściowe pokrycie kosztów. Zastosowano również metodę analizy funkcjonalnej środowiska, oceniając efektywność poprzez porównanie wolumenu usług z kosztami. Obliczono całkowity współczynnik efektywności w odniesieniu do wskaźników nieefektywności, ujawniając trendy charakterystyczne dla poszczególnych sektorów i czynniki związane z kosztami. W artykule podkreślono znaczenie dostosowania kosztów w przypadku, gdy nie można osiągnąć wyższego wolumenu usług, co zapewnia dokładniejszą ocenę efektywności. Chociaż wyniki badań odnoszą się do sytuacji Ukrainy, mają one znaczenie dla krajów UE, które priorytetowo traktują zrównoważony rozwój. Zastosowanie tych metod w całej UE mogłoby wspierać skuteczniejsze i bardziej elastyczne strategie oceny ekonomicznej ochrony środowiska oraz przyspieszyć wdrażanie ekologicznie zrównoważonych gospodarek.

14

Optimising the Operation of Ships with Artificial Intelligence Systems

Bolkvadze Nugzar, Verdzadze Ruslan, Bazaian Aram, Bolkvadze Levan, Gabedava George

Polish Maritime Research

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2025

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nr 4

119--131

EN

The objective of this study was to conduct an empirical evaluation of the effectiveness of artificial intelligence systems in optimising the operation of commercial maritime vessels. The methodology involved collecting and processing telemetry from 58 synchronised onboard measurement channels, including temperatures, vibration metrics, gyroscopic data, trim and heel angles, and data from automatic identification systems, differential global positioning systems, and radar signals. Data were sampled at intervals of 1 s, filtered using the Hampel method, and aggregated into frames of 3 min. A hybrid deep learning model was developed to forecast vessel speed, fuel usage, and stability. Experiments were conducted on 16 vessels: six container carriers (3,000 20-foot equivalent units class) and 10 Handymax bulk carriers (40,000–55,000 deadweight tons). These vessels completed 97 voyages between March 2023 and February 2024, 45% of which took place in the Black Sea and 55% in the North Sea. A validation campaign comprising 9,230 h of simulator trials and real-world deployment was carried out to test the artificial intelligence model under variable sea states and in scenarios involving disruptions to automatic identification and differential global positioning systems. The results showed a 12.4% reduction in average fuel consumption and an 8.2% decrease in voyage duration. Ship stability improved, with a 22% reduction in roll amplitude. Predictive maintenance algorithms achieved 95% accuracy, enabling early fault detection and reducing unscheduled downtime. Only three manual interventions were recorded during deployment, and course deviations remained below 1.3°. An environmental analysis revealed a 4.2% improvement in carbon intensity, demonstrating compliance with the International Maritime Organization Carbon Intensity Indicator standards.

15

Sustainable development in organization of urban transport: Environmental approach based on tricity area

Rzesny-Cieplinska Jagienka Jowanka, Kuczewska Joanna, Kawamura Kazuya

LogForum

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2025

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Vol. 21, no 1

123--140

EN

Background: The urban transport system is a complex network involving various stakeholders, each with distinct roles and objectives. Consequently, the tasks of local authorities regarding urban transport are becoming increasingly challenging, especially with the growing focus on sustainable development. Methods: This paper aims to define the key functions of urban transport organizers that significantly impact environmental sustainability. The primary goal is to assess the importance and impact of urban transport organizers in enhancing environmental sustainability in Tricity (Gdansk, Gdynia, and Sopot). The study, conducted in 2022, engaged a range of Polish stakeholder groups, including urban transport organizers from Tricity’s public transport companies, local authorities, freight transport companies, and local residents. A total of 342 observations were collected using Paper-and-Pencil Interviewing (PAPI), In-Depth Interviewing (IDI), and Computer-Assisted Web Interviewing (CAWI) methods. Results: The study reveals a differentiated impact of urban transport organizer functions on environmental sustainability indicators. The most significant influence comes from financial, infrastructural and space management functions. Conclusions: Improving processes related to passenger mobility and urban freight transport is particularly complex yet essential for sustainable urban development. Integration processes in urban transport, occurring at different levels and in various areas, can unify all aspects of city transport management without distinguishing between types of transportation.

16

Climate change vulnerability of Drâa-Tafilalet oases : A survey and ground-level perspective

Bouzelmate Hicham, Jaiti Fatima, El Bakouri Zineb, Meziani Reda, Hssaini Lahcen, Rhazi Mouhssine

Journal of Water and Land Development

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2025

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no. 65

164--176

EN

This research investigates the impacts of climate change on date palm cultivation in the Drâa-Tafilalet oases of southeastern Morocco, employing a mixed-methods approach that combines on-the-ground observations and semistructured interviews with 120 date palm farmers. Field observations across three key oases document widespread hazards and effects of climate-related stress on date palms, including disrupted flowering synchronicity, increased incidence of parthenocarpy, and heightened vulnerability to pests and diseases. A survey of these 120 farmers revealed the severity and interconnected nature of these impacts. Several farmers (30% in Boudnib, 40% in Errachidia and 40% in Zagora) observed multiple asynchronous flowering cycles per year, while parthenocarpy emerged as a significant concern, with prevalence ranging from 20% in Zagora to 40% in Boudnib. While 10-15% of farmers reported inflorescence rot, a concerning knowledge gap exists regarding effective preventative treatments, with only 315% of farmers employing them. Farmer surveys further revealed that wind-driven mite infestations pose a growing threat, with 50% of farmers in Zagora reporting significant issues. The research explores ways to reduce the effects of climate change through methods like creating crops resistant to climate conditions, enhancing water supply systems, combining pest and pollinator control methods, and implementing new pollination approaches. Nevertheless, it highlights the need for tailored adaptation and mitigation strategies that incorporate both scientific knowledge and local, farmer-driven insights. The study emphasises the urgency of proactive measures to address the socioeconomic consequences of climate change on these culturally and economically vital oases.

17

Challenges in artisanal small-scale gold mining: perspectives and transformations to sustainability along BR-163 in Brazil

Araujo Carlos H.X., Ullah Irfan, de Tomi Giorgio

Journal of Sustainable Mining

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2025

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Vol. 24, iss. 2

333--345

EN

Artisanal Small-scale Gold Mining (ASGM) is a sector beset with unique and complex challenges. Recent literature highlights the growing acknowledgment of the critical need for reforms in how the ASGM industry interacts with communities and the environment. Discussions about sustainable transformations go beyond theoretical and conceptual borders, attempting to understand how local transformative events might reflect global developments. Thus, the goal of this article is to give an analysis from the perspective of the actors participating in artisanal gold mining activities. A survey was carried out along BR-163, which runs from Sinop (Mato Grosso) to Santarém (Pará). Fifty-five (55) interviews were done with various groups of actors directly and indirectly related to gold mining. The findings highlight the importance of formalizing gold mining operations, organizing social activities around cooperatives, and continuously pursuing technical and educational efforts. Furthermore, strengthening control structures and ensuring traceability of generated gold is critical. Finally, for transitions towards gold mining sustainability to occur, it is essential to emphasize the necessity of recognizing multiple viewpoints and narratives that shape sustainability challenges and solutions.

18

Double Materiality as a Basis for Identifying Impacts Related to Sustainability Issues

Piętka Konrad, Ziaja Szymon

Inżynieria Mineralna

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2025

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Vol. 1, no. 1

35--40

EN

Sustainability is a major challenge for organizations, both in terms of its reporting and in terms of conducting environmentally and socially sustainable activities themselves. This article addresses sustainability with a particular focus on the environmental part. The concept of sustainable development is presented in the context of challenges arising from international and European law. The aim of the article is to analyze and present the most important determinants, legal regulations and guidelines for conducting and reporting the sustainability process based on a double materiality analysis, which results from the Corporate Sustainability Reporting Directive (CSRD) and the related European Sustainability Reporting Standards (ESRS). It also discusses the constituent elements of a double materiality analysis based on two perspectives: impact materiality and financial materiality. This analysis provides the basis for guiding an organization’s sustainability process.

PL

Zrównoważony rozwój stanowi duże wyzwanie dla organizacji, zarówno w aspekcie jego raportowania, jak również samego prowadzenia działalności zrównoważonej środowiskowo i społecznie. Artykuł porusza problematykę zrównoważonego rozwoju ze szczególnym uwzględnieniem części dotyczącej środowiska naturalnego. Koncepcja zrównoważonego rozwoju została przedstawiona w kontekście wyzwań wynikających z prawa międzynarodowego oraz europejskiego. Celem artykułu jest analiza i prezentacja najważniejszych determinant, regulacji prawnych oraz wytycznych dotyczących prowadzenia i raportowania procesu zrównoważonego rozwoju w oparciu o analizę podwójnej istotności, co wynika z Dyrektywy dot. sprawozdawczości przedsiębiorstw w zakresie zrównoważonego rozwoju (CSRD) i związanych z nią Europejskich Standardów Sprawozdawczości Zrównoważonego Rozwoju (ESRS). Omówiono także składowe elementy analizy podwójnej istotności opartej na dwóch perspektywach: istotności wpływu oraz istotności finansowej. Analiza ta stanowi podstawę do prowadzenia procesu zrównoważonego rozwoju w organizacji.

19

Evaluation of construction changes in concrete tanks for storage of livestock slurry

Barwicki Jan, Mazur Kamila E., Borek Kinga, Wardal Witold J., Roman Kamil K., Kierończyk Marek

Inżynieria Materiałowa

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2025

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Vol. 46, nr 1

6--15

EN

In connection with the applied technique of acidification slurry in order to reduce the emission of ammonia, the anticipated research problem became the issue of durability of concrete tanks used for storing liquid manure. The aim of study was to investigate the microstructural changes and corrosion behavior of steel reinforced concrete, especially in aggressive and corrosive environments like animal slurry. During experiment, the samples are periodically inspected to determine any changes occurring as a result of the corrosion process. Strength tests were carried out in the intervals of: 28 days after forming samples, 6, 12 and 21 months (with the exception of non-acidified slurry). ANOVA analysis was used in order to compare physical parameters according to the concrete mix. After strength tests concrete samples were taken for microscopic examination, to find and evaluate any changes in the concrete structure. Chemical composition of tested samples show the lack of crystals calcium hydroxide and residual cement and a clear start to the formation of ettringite crystals. Ettringite was quantified by using both differential scanning calorimetry and X-ray diffraction; the resulting volume changes in the samples were measured. If we take into consideration two concrete mixtures C 25/30 and C 30/37, the second one is more resistant to activity of acidified slurry, what is presented in crystals formation. The structure of crystals of concrete C 25/30 are bigger compare to crystals of concrete C 30/37. Concrete type C 30/37 after 21 month of storage in acidified slurry meet comprehensive strength of concrete type C 45/55. The final conclusion of the study: the acidified slurry did not cause a significant reduction in the strength of the C30/37 concrete specimens compared to the non-acidified slurry during the two-year storage period. As a result of macroscopic evaluation, no corrosion changes were observed for the 17 mm lagging when the acidified slurry was stored. The above results allow us to conclude that the durability of reinforced concrete tanks intended for storing slurry with sulfuric acid addition will not decrease, and as a result, there will be no need to increase the production of construction cement for agricultural purposes. Thus, there will be no increase in global CO2 emissions.

PL

W związku ze stosowaną techniką zakwaszania gnojowicy w celu ograniczenia emisji amoniaku, przewidywanym problemem badawczym stała się kwestia trwałości zbiorników betonowych wykorzystywanych do przechowywania gnojowicy. Przedmiotem opracowania było zbadanie zmian konstrukcyjnych i odporności na korozję betonu zbrojonego stalą w zbiornikach do przechowywania gnojowicy zwierzęcej. Próbki były okresowo kontrolowane w celu zbadania zmian zachodzących w wyniku procesu korozji. Badania wytrzymałościowe przeprowadzono po 28 dniach od uformowaniu próbek oraz po 6, 12 i 21 miesiącach. Analizę ANOVA zastosowano w celu oceny parametrów fizycznych w zależności od wykorzystanego betonu C30/37 lub C45/55. Podczas badań nie zaobserwowano znaczącego wzrostu porowatości badanych próbek w porównaniu z próbkami referencyjnymi i zjawisk powodujących rozległą degradację struktury betonu. Zaobserwowano, że gdy porowatość betonu wzrasta, odporność na korozję maleje. Na podstawie badań można wnioskować, że podczas 2-letniego okresu przechowywania zakwaszona gnojowica nie spowodowała znaczącego zmniejszenia wytrzymałości próbek betonu C30/37 w porównaniu z niezakwaszoną gnojowicą. Trwałość zbiorników żelbetowych przeznaczonych do magazynowania gnojowicy z dodatkiem kwasu siarkowego nie ulegnie zmniejszeniu, a co za tym idzie, nie będzie potrzeby zwiększania produkcji cementu budowlanego do celów rolniczych o wyższych parametrach wytrzymałościowych C45/55. Tym samym nie nastąpi wzrost globalnej emisji CO2.

20

Comparative analysis of water consumption in twinned indoor swimming pools in a Silesian Voivodeship of Poland

Mika-Shalyha Anna, Wyczarska-Kokot Joanna, Lempart-Rapacewicz Anna

Instal

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2025

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nr 2

35--40

EN

Swimming pools, due to their specific nature, are sports facilities for which demand is highest for water of a quality subject to restrictive regulations. The objective of this study is to provide a detailed characterisation of the structure of water consumption in three ‘twin’ swimming pool facilities located in Poland, in the Silesian Voivodeship. Each of the analysed facilities includes a sports pool, a recreational pool with water attractions, a water slide, a whirlpool and a children’s paddling pool. The findings of this study demonstrate a strong correlation between water consumption and the type of users and water management practices employed. In particular, it was found that recreational pools with water attractions (slides, whirlpools) used significantly more water than traditional sports pools. The findings of this case study offer a valuable foundation for the development of strategies aimed at enhancing the efficiency of water management in swimming pool facilities.

PL

Obiekty basenowe, ze względu na swoją specyfikę, są obiektami sportowymi o największym zapotrzebowaniu na wodę o jakości regulowanej restrykcyjnymi przepisami. Niniejsza praca ma na celu szczegółową charakterystykę struktury zużycia wody w trzech „bliźniaczych” obiektach basenowych zlokalizowanych w Polsce, w województwie śląskim. W każdym z analizowanych obiektów znajduje się basen sportowy, basen rekreacyjny z atrakcjami wodnymi, zjeżdżalnia wodna, wanna z hydromasażem i brodzik dla dzieci. Wyniki badań dowodzą, że istnieje silna korelacja między zużyciem wody a rodzajem użytkowników i stosowanymi praktykami zarządzania wodą. W szczególności dla basenów rekreacyjnych wyposażonych w atrakcje wodne (zjeżdżalnie, hydromasaże) wykazano znacznie wyższe zużycie wody w porównaniu z tradycyjnymi basenami typu sportowego. Wyniki niniejszego studium przypadku mogą zostać wykorzystane do opracowania strategii optymalizacji efektywnego zarządzania wodą w obiektach basenowych.