Repozytorium publikacji - Politechnika Gdańska

Ustawienia strony

english
Repozytorium publikacji
Politechniki Gdańskiej

Pokaż publikacje z roku

Publikacje z roku 2024

Pokaż wszystkie
  • Innowacyjne zarządzanie transportem w miastach
    • Daniel Kaszubowski
    2024

    Współczesne miasta i aglomeracje koncentrują najważniejsze funkcje społeczne i gospodarcze dla blisko 75% mieszkańców Unii Europejskiej i odsetek ten systematycznie wzrasta (o 16% w ciągu ostatniego półwiecza). Podstawowym czynnikiem umożliwiającym pełne wykorzystanie ich potencjału jest zrównoważone zarządzanie mobilnością miejską, bezpośrednio wpływającą na jakość życia mieszkańców i funkcje gospodarcze. Europejskie miasta i aglomeracje są bardzo zróżnicowane pod względem wielkości i struktury przestrzennej , jednak wszystkie napotykają podobne problemy dotyczące rozwoju transportu, poszukując jednocześnie skutecznych metod ich długofalowego rozwiązania . Wobec złożoności wyzwań dotyczących transportu w miastach coraz wyraźniejsza staje się konieczność zintegrowanego planowania wszystkich jego rodzajów . Dotyczy to zarówno planowania strategicznego (np. przez plany zrównoważonej mobilności miejskiej, tzw. SUMP, Sustainable Urban Mobility Plan), jak i koordynacji zarządzania transportem na poziomie instytucjonalnym. W zaawansowanej formie może to oznaczać powołanie miejskiego lub aglomeracyjnego zarządu transportu o kompetencjach wykraczających poza typowe zadania dotyczące organizacji transportu zbiorowego , obejmujących również transport ładunków. Wykorzystanie zasad logistyki, opartej na integracji i usprawnieniu przepływów o różnym charakterze, może usprawnić zarządzanie miejskim systemem transportowym . Może to również przyczynić się do pokonywania barier funkcjonowania i rozwoju miast przez zintegrowane kształtowanie przepływów osób i ładunków . Systemowe podejście do planowania transportu w miastach, poza już wymienionymi zagadnieniami, wymaga również lepszej koordynacji działań sektora publicznego i prywatnego. Jest to zadanie szczególnie istotne z punktu widzenia zarządzania transportem ładunków, traktowanego przez długi czas wyłącznie jako domena sektora prywatnego

  • INNOWACYJNY SYSTEM NAGRZEWANIA PREFORM PET ZMNIEJSZAJĄCY ZUŻYCIE ENERGII ELEKTRYCZNEJ W TECHNOLOGII WYTWARZANIA OPAKOWAŃ METODĄ ROZDMUCHU
    • Waldemar Karaszewski
    • Paweł Wawrzyniak
    2024 Przemysł Chemiczny

    W artykule przedstawiono wybrane wyniki własnych badań doświadczalnych nad zastosowaniem nowego kształtu reflektora w celu zmniejszenia zużycia energii elektrycznej niezbędnej do nagrzania preform PET. Opisano zmodyfikowany proces technologiczny oraz zdefiniowano sposób transferu preform w piecu nagrzewającym skorelowany z kształtem nowego reflektora. Zdefiniowano parametry procesu technologicznego oraz zdefiniowano uzyskane oszczędności energii elektrycznej.

  • Inorganic membrane: a game changer for gas separation and purification
    • Tonni Agustiono Kurniawan
    • Mamoona Riaz
    • Ayesha Mohyuddin
    • Ahtisham Haider
    • Shahnoor Ali
    • G. Abdulkareem-Alsultan
    • Mohd Hafiz Dzarfan Othman
    • Hui Hwang Goh
    • Abdelkader Anouzla
    • Hussein Al-Hazmi
    • Faissal Aziz
    • Yusuf Wibisono
    • Tutuk Djoko Kusworo
    • Sadeq Abdullah Abdo Alkhadher
    • Md. Rajibur Rahaman Khan
    2024 CHEMICAL PAPERS

    This review explores the advancements and remaining challenges in inorganic membrane science, particularly focusing on their potential for industrial applications. It delves into the fundamental principles of inorganic membrane design, fabrication, and characterization techniques. The review also critically analyzes key challenges faced by inorganic membranes, such as physical aging, plasticization, defective formation, and fouling. Strategies for overcoming the limitations to enhance permeability and long-term stability are discussed. Specific examples are provided to illustrate the applications of inorganic membranes in gas separation and wastewater treatment, emphasizing their high chemical stability, as compared to conventional polymeric membranes. The energy efficiency of inorganic membranes for volatile organic compound (VOC) removal at ambient temperatures is highlighted with PDMS (polydimethylsiloxane) serving as an example for removing toluene, xylene, and acetone from gas streams. Finally, the review assesses future research directions to further enhance the engineering applicability of inorganic membranes for wastewater treatment and gas separation, solidifying their position as a promising technology for diverse industrial processes.

  • Insights in microbiotechnology: 2022.Editorial
    • Muhammad Bilal
    2024 Pełny tekst Frontiers in Microbiology

    This Research Topic serves as an invaluable resource for readers interested in staying updated with the latest progress and developments in the field of microbiotechnology. It spotlights the innovative research conducted by up-and-coming experts in the field, specifically emphasizing the transforming abilities of microorganisms that greatly influence the scientific community. The advent of multi-omic technologies has revolutionized microbiotechnology, allowing for a comprehensive understanding of the molecular landscape. Additional research is required to explore artificial intelligence, machine learning, multidimensional statistical techniques, and user-friendly analytical tools for uncovering the correlation between microbial metabolites and the host, as well as gaining a deeper comprehension of microbial interaction with environmental pollutants.

  • INSIGHTS INTO THE PROCESSING, STRUCTURE, AND MECHANICAL PERFORMANCE OF POLYETHYLENE/GYPSUM COMPOSITES
    • Aleksander Hejna
    • Mateusz Barczewski
    • Paulina Kosmela
    • Olga Mysiukiewicz
    2024 Composites Theory and Practice

    Polymer composites are used in all branches of industry, with numerous applications. Despite the many years of modifying commodity polymers, using novel fillers allows the range of their applicability to be extended. The impact of new types of fillers on the polymer matrix is not always predictable and requires further studies. The presented study analyzed the application of gypsum as a filler for composites based on high-density polyethylene (PE). The filler was introduced in the amounts of 1-20 wt.%, and its impact on the processing, static, and dynamic mechanical performance of the composites was investigated. At lower filler loadings, the composites could be processed without any hindrance of flowability compared to the neat PE. Up to 5 wt.%, the tensile strength was maintained at a similar level to PE due to the satisfactory quality of the interface and good interfacial adhesion. Higher loadings caused a drop in the tensile strength with a simultaneous rise in Young’s modulus. A further increase in the filler loading resulted in higher values of porosity and growth of the adhesion factor, determined from the dynamic mechanical results, which led to deterioration of the mechanical performance.

  • Instalacje fotowoltaiczne w budownictwie wielorodzinnym
    • Konrad Seklecki
    • Leszek Litzbarski
    • Kuba Wójcik
    • Zuzanna Cieślikowska
    • Mirosław Włas
    • Jacek Grochowski
    2024 Pełny tekst Przegląd Elektrotechniczny

    Artykuł opisuje wpływ instalacji fotowoltaicznych na bezpieczeństwo eksploatacji budynków wielorodzinnych. W oparciu o projekty rzeczywistych obiektów przeprowadzono analizę zwiększenia ryzyka strat odgromowych, zmiany obciążenia konstrukcji dachu i wzrostu zagrożenia pożarowego na skutek montażu systemu fotowoltaicznego. Przeprowadzone obliczenia wskazują na konieczność kompleksowego podejścia do projektowania instalacji fotowoltaicznych. Dodatkowo oszacowano opłacalność takiej inwestycji w przypadku budynków wielorodzinnych.

  • Integrated Approach For Functional Safety And Cyber Security Analysis
    • Tomasz Barnert
    • Emilian Piesik
    • Jan Piesik
    • Marcin Śliwiński
    2024

    The paper is devoted to some important issues of the functional safety analysis, in particular the safety integrity level (SIL) verification process. It is related to the safety instrumented functions to be implemented within the distributed control and protection systems with regard to security aspects. A method based on quantitative and qualitative information is proposed for the SIL (IEC 61508:2010; 61511, 2015) verification with regard of the evaluation assurance levels (EAL) the security assurance levels (SAL) (IEC 62443, 2013), and the number of protection rings described in the Secure Safety (SeSa-SINTEF) methodology. The proposed approach will be composed of the following items: process and procedure-based safety and security management, integrated safety and security assessment of industrial control system (ICS) of the critical infrastructure.

  • Integration of electric vehicle into smart grid: a meta heuristic algorithm for energy management between V2G and G2V
    • G. Srihari
    • R. S. R. Krishnam Naidu
    • Przemysław Falkowski-Gilski
    • Parameshachari Bidare Divakarachari
    • Ravi Kiran Varma Penmatsa
    2024 Pełny tekst Frontiers in Energy Research

    Recently, Electric Vehicles (EV) have been providing fast response and substantial progress in the power generation model. Further, EVs are exploited as adaptable Energy Storage Systems (ESSs) and show a promising performance in ancillary service markets to increase the demand of Smart Grid (SG) integration. The expansion of Vehicle-to-Grid concept has created an extra power source when renewable energy sources are not available. Yet, numerous operational problems still are required to be considered for EV implementation to turn out to be extensive. Even the development of Photo-Voltaic (PV) technology creates a problem in SGs when used for EV charging. Because of this, the Energy Management System (EMS) is required to handle charging requirements and deal with the intermittent generation. Here, in this research, an Improved Honey Badger algorithm (IHBA) is proposed for integrating SGs with EV parking lot, solar panels, and dynamic loads at the Point of Common Coupling (PCC). The proposed IHBA uses a dynamic programming method to optimize the charging Grid-to-Vehicle (G2V) or discharging Vehicle-to-Grid (V2G) profiles of the EVs using the forecasts of PV generation. This algorithm considers user preferences while also lowering reliance on the grid and maximizing SG effectiveness. The study’s findings show that the Honey Badger method is efficient in resolving issues involving large search spaces. The developed method is used to optimize charging and discharging of EV which is tested in MATLAB to obtain a stable load profile. From the evaluation of obtained results, it is evident that the IHBA controller outperforms the WOA and EHO controllers in terms of total harmonic distortion voltage (3.12%), power loss (0.197 kW) and efficiency (98.47%).

  • Interfacial behaviour of human bile and its substitution for in vitro lipolysis studies
    • Dorota Dulko
    • Ilona Kłosowska-Chomiczewska
    • Teresa del Castillo-Santaella
    • Miguel Angel Cabrerizo-Vílchez
    • Justyna Łuczak
    • Robert Staroń
    • Łukasz Krupa
    • Julia Maldonado-Valderrama
    • Adam Macierzanka
    2024 FOOD RESEARCH INTERNATIONAL

    This study examined the interfacial evolution of individual bile salts (BSs) and their blends with phosphatidylcholine (BS/PC) to simulate the complex behaviour of human bile (HB) during lipolysis at the triglyceride/water interface. Using adsorption and desorption cycles, mimicking exposure to small intestinal fluids, we demonstrate that the interfacial behaviour of real HB can be replicated using simple mixtures of BSs and PC. Interfacial tension (IFT) measurements after lipolysis and desorption showed no significant differences (P > 0.05) between HB samples and BS/PC mixtures across the total BS concentrations analysed (2.23–7.81 mM). However, individual BSs without PC yielded significantly different IFT results (P < 0.01) compared to HB, highlighting the importance of phospholipids. Dilatation rheology further emphasised the need for accurate phospholipid representation in bile models. Our results suggest that phospholipids in HB and in BS/PC systems enhance resistance to desorption, potentially affecting lipolysis. This is important, as current in vitro digestion models often replicate only intestinal BS concentrations to mimic the behaviour of HB in the intestinal lumen. Furthermore, the specific composition of BSs in HB appears less critical than the overall BS and phospholipid contents, suggesting that the kinetics of triglyceride digestion is influenced by the combined luminal concentrations of these components. These findings have significant implications for understanding the role of bile in digestion and offer insights for designing more accurate in vitro models to study the gastrointestinal behaviour of food emulsions and lipid-based delivery systems.

  • Interventions reducing car usage: Systematic review and meta-analysis
    • Romanika Okraszewska
    • Aleksandra Romanowska
    • Dana Clarissa Laetsch
    • Anna Gobis
    • Lucia Reisch
    • Carlijn B.M. Kamphuis
    • Jeroen Lakerveld
    • Piotr Krajewski
    • Anna Banik
    • Nicolette R. Den Braver
    • Sarah Forberger
    • Hermann Brenner
    • Joanna Żukowska
    2024 Pełny tekst TRANSPORTATION RESEARCH PART D-TRANSPORT AND ENVIRONMENT

    This systematic literature review aimed to investigate the extent to which transport-related interventions induced a reduction in car use. Both qualitative synthesis and meta-analysis were employed. The synthesis included 31 original studies, while the meta-analysis included 21. Of the qualitatively synthesised studies, 74 % demonstrated that interventions were effective in reducing car use. The pooled estimates of the effects showed a significant reduction in car usage with a mean effect size of Hedges’ g = -0.117 (p = 0.024). The effect strongly varies across the studies due to considerable heterogeneity (I2 = .98, with a 95 % prediction interval from −0.589 to 0.355). At the moderator level, no significant differences were identified in the mean effect sizes for any subgroups, and the key factors could not be distinguished. The current body of evidence highlights that transport-related interventions can significantly influence car usage reduction, while literature suggests that this may benefit environment and society.

  • Introduction to the RSC Advances themed collection on nano and microscale modifications of biomaterials
    • Andrzej Zieliński
    • Beata Majkowska-Marzec
    2024 Pełny tekst RSC Advances

    The dramatically increasing development of novel biomaterials, their manufacturing techniques, and surface modications, as well as their application in in vivo tests and clinical trials, is evident. It is interesting to note in what a relatively short time the well-known long-term implants have become medical standard: titanium dental implants started in 1965, and total hip arthroplasty (not very successful) was rst attempted in 1961. Even aer about y years of research, real progress can be noticed recently thanks to composite materials and coatings, the development of their fabrication such as 3D printing, and, last but not least, the appearance of sophisticated instruments to characterize surfaces, e.g. atomic force microscopy. For implants and materials for bone repair, the role of an interface between any materials is key. The bulk properties are important to assess the durability of the implant as a whole construct, and the interface dictates the corrosion rate, hydrophilicity and biocompatibility, bioactivity, antibacterial properties, and the lack of cytotoxicity. All these surface properties determine the function and lifetime of long-term implants. And, all of them are modeled at the nano and microscale.

  • Investigating BiMeVOx compounds as potential photoelectrochemical and electrochemical materials for renewable hydrogen production
    • Mariusz Szkoda
    • Malgorzata Skorupska
    • Patrycja Grabowska
    • Marta Gajewska
    • Anna Ilnicka
    2024 INTERNATIONAL JOURNAL OF HYDROGEN ENERGY

    In this study, BiMeVOx compounds (where Me: Co, Mo, Ce, Zr) were synthesized and characterized as potential photoelectrochemical materials for solar water splitting, the hydrogen evolution reaction (HER), and oxygen evolution reaction (OER). The analysis confirmed the successful formation of phase BiMeVOx compounds with the desired crystal structure. Among the tested materials, BiCoVOx(800) showed the highest photocurrent density (674 μA cm−2) and HER/OER activity (Tafel slope: HER = 100 mV dec−1 and OER = 75 mV dec−1), followed by BiMoVOx(800), BiCeVOx(800), and BiZrVOx(800). The superior photoelectrochemical performance of BiCoVOx(800) can be attributed to its unique electronic structure and optimized band alignment, which promote efficient charge separation and facilitate the water splitting and hydrogen evolution processes. The findings of this study highlight the promising potential of the synthesized BiMeVOx materials, particularly BiCoVOx, as efficient photoelectrochemical catalysts for water splitting. These results contribute to the advancement of renewable energy technologies and provide valuable insights for the design and development of novel photoactive materials.

  • Investigating COVID-19 active pharmaceutical ingredients (APIs) degradation using Peroxydisulfate/FeMnOx binary metal oxide/Ultrasound System
    • Amin Bagheri
    • Akram Fallah
    • Jakub Karczewski
    • Akbar Eslami
    • Amir Mohammad Sheikh Asadi
    • Grzegorz Boczkaj
    2024 Pełny tekst Water Resources and Industry

    Degradation of Favipiravir using a hybrid system of peroxydisulfate, FeMnOx binary metal oxide, and ultrasound irradiation was studied. A novel catalyst was synthesized with deep eutectic solvent (DES). The effects of DES type on catalytic performance was evaluated and the catalysts were characterized using XRD, SEM, BET, XPS, and EDS. DES-based catalysts exhibited higher efficiency due to structure change, surface area enhancement and significantly improved Favipiravir adsorption. The DES-based catalyst exhibited a 30 % increase in surface area and a 20-fold increase in Mn content. Additionally, XRD and XPS analyses suggested the reduction of Fe3+ ions, possibly to Fe3O4. Optimal operational parameters (pH = 10, catalyst dose = 500 mg/L, and rox = 20) provide removal efficiency of 70.1 % after 3 h. The catalyst showed stable activity after three cycles, indicating reusability. This study presents a promising approach for the sustainable degradation of COVID-19 APIs, with implications for the pharmaceutical industry.

  • Investigating Fuel Injection Strategies to Enhance Ship Energy Efficiency in Wave Conditions
    • Mohammad Ghaemi
    • Hamid Zeraatgar
    • Mojtaba Barjasteh
    2024 Pełny tekst Polish Maritime Research

    The prediction of fuel consumption and resulting transportation costs is a crucial stage in ship design, particularly for conditions involving motion in waves. This study investigates the real-time fuel consumption of a container ship when sailing in waves. The overall ship performance is evaluated using a novel non-linear coupled hull-engine-propeller interaction model. A series of towing tank experiments for hull resistance in waves and propeller performance are conducted. The ship engine is mathematically modelled by a quasi-steady-state model equipped with a linear Proportional-Integrator (PI) governor. Various scenarios of shipping transportation are studied, and the resulting instantaneous fuel consumptions and their correlation to other dynamic particulars are demonstrated. Additionally, daily fuel consumption and fuel cost per voyage distance are presented. It is also shown that the controller can effectively adjust the fuel rate, resulting in minimum fuel consumption. The study concludes that there is no correlation between fuel consumption and the frequency of fuel rates. The present framework and mathematical model can also be employed for ship design and existing ships to predict the total required energy per voyage.

  • Investigating Layered Topological Magnetic Materials as Efficient Electrocatalysts for the Hydrogen Evolution Reaction under High Current Densities
    • Sanju Gupta
    • Hanna Świątek
    • Mirosław Sawczak
    • Tomasz Klimczuk
    • Robert Bogdanowicz
    2024 Pełny tekst Catalysts

    Despite considerable progress, high-performing durable catalysts operating under large current densities (i.e., >1000 mA/cm2) are still lacking. To discover platinum group metal-free (PGMfree) electrocatalysts for sustainable energy, our research involves investigating layered topological magnetic materials (semiconducting ferromagnets) as highly efficient electrocatalysts for the hydrogen evolution reaction under high current densities and establishes the novel relations between structure and electrochemical property mechanisms. The materials of interest include transition metal trihalides, i.e., CrCl3, VCl3, and VI3, wherein a structural unit, the layered structure, is formed by Cr (or V) atoms sandwiched between two halides (Cl or I), forming a tri-layer. A few layers of quantum crystals were exfoliated (~50−60 nm), encapsulated with graphene, and electrocatalytic HER tests were conducted in acid (0.5M H2SO4) and alkaline (1M KOH) electrolytes. We find a reasonable HER activity evolved requiring overpotentials in a range of 30–50 mV under 10 mA cm−2 and 400−510 mV (0.5M H2SO4) and 280−500 mV (1M KOH) under −1000 mA cm−2. Likewise, the Tafel slopes range from 27 to 36 mV dec−1 (Volmer–Tafel) and 110 to 190 mV dec−1 (Volmer–Herovsky), implying that these mechanisms work at low and high current densities, respectively. Weak interlayer coupling, spontaneous surface oxidation, the presence of a semi-oxide subsurface (e.g., O–CrCl3), intrinsic Cl (or I) vacancy defects giving rise to in-gap states, electron redistribution (orbital hybridization) affecting the covalency, and sufficiently conductive support interaction lowering the charge transfer resistance endow the optimized adsorption/desorption strength of H* on active sites and favorable electrocatalytic properties. Such behavior is expedited for bi-/tri-layers while exemplifying the critical role of quantum nature electrocatalysts with defect sites for industrial-relevant conditions.

  • Investigating the combined effects of devulcanization level and carbon black grade on the SBR/GTR composites
    • Agata Rodak
    • Józef Haponiuk
    • Shifeng Wang
    • Krzysztof Formela
    2024 Express Polymer Letters

    Carbon black migration between ground tire rubber (GTR) and rubber matrix is essential in developing high-performance rubber/GTR composites. In this work, carbon black N220 (surface area: 107.1 m2/g, particle size: 20–25 nm) andN660 (surface area: 33.1 m2/g, particle size: 49–60 nm) were used as the reinforcement fillers for styrene-butadiene rubber(SBR) blended with reclaimed GTR. The combined effects of GTR devulcanization level and carbon black grade on the properties of SBR/GTR composites were investigated considering curing characteristics, thermal stability, physico-mechanical properties, dynamic mechanical properties, swelling behavior, and morphology. The results showed that, regardless of GTR devulcanization level and carbon black grade, application of GTR resulted in deterioration of mechanical properties compared to a reference sample without GTR. It was observed the reinforcement effect of carbon black in SBR/GTR composites was more visible with higher devulcanization level of GTR and lower particle sizes of carbon black fillers. SBR/GTR composites reinforced with carbon black N220 were characterized by tensile strength in the range of 15.3–16.3 MPa and abrasion resistance in the range of 120–123 mm3, which justify their potential application in the manufacturing of technical rubber goods or footwear.

  • Investigating the sustainability, utilisation, consumption and conservation of sea mammals – A systematic review
    • Shahida Anusha Siddiqui
    • Sunayana Baruah
    • Yuan Seng Wu
    • Sunrixon Carmando Yuansah
    • Roberto Castro Munoz
    • Andrzej Szymkowiak
    • Piotr Kulawik
    2024 Pełny tekst Sustainable Production and Consumption

    Almost 80 % of the oceans, especially the Arctic and Subarctic are primarily inhabited by marine mammals. Marine species depend mostly on sea ice for food, raising their young ones and safeguarding themselves from predators. Consumption of marine mammals has always been recommended as healthy, but the truth is that it can be detrimental for human health because of sea water pollution from trash and chemicals. This systematic review provides an in-depth examination of sea mammals, their complex relationship with humans, and their sustainability in the face of various threats such as overexploitation and climate change. Through analysis of various aspects regarding human-sea mammal interactions - including consumption, cultural and religious beliefs, use in traditional medicine, and negative impacts from, e.g. by-catch and overfishing - the significant pressures exerted on these species are highlighted in this systematic review. Despite conservation efforts, certain sea mammal populations continue to decline, necessitating more robust research and policy action. The need for further research into the sustainable utilisation of sea mammals, considering health, ecological, economic, ethical and cultural aspects, as well as the accumulation of pollutants in sea mammals, is underscored. Additionally, a comprehensive list of knowledge gaps and future research directions are provided to enhance our understanding and conservation of these unique marine creatures.

  • Investigating trip and parking characteristics of hospitals: A case study from Tri-City, Poland
    • Marta Sochacka
    • Aleksandra Romanowska
    • Wojciech Kustra
    2024 Journal of Transport & Health

    This research aims to investigate public hospitals’ trip and parking characteristics based on the study conducted in Poland in September 2021 on the example of the Tri-City agglomeration. The main objective of the research was to build models of the relationship between the number of trips during peak transport hours and the number of beds. The second research element was the analysis of transport behavior in these areas. The research included measuring vehicle and pedestrian flow on the road network for four hospitals (2 in Gdansk and 2 in Gdynia) and analyzing data from two parking systems. Research data has shown that hospitals are large traffic generators and can negatively affect the road network’s capacity around them. This accounts for hundreds to over two thousand vehicle trips per hour generated by a single development. Traffic related to hospitals is structured with distinct peaks which partially overlap the peak hours of surrounding traffic. The results showed that trip generation rates by hospitals range from 1.25 to 2.9 per bed in the AM peak hour and 1.01 to 2.78 in the PM peak hour, and 54–68% of these trips are made by car, depending on the location of the hospital or the availability of public transport. An important element of the transport service for these facilities is the possibility of parking the vehicle in the immediate vicinity of the hospital. Parking characteristics strongly depend on parking users, with different distributions of parking times and arrival/departure times. The results may be used to predict and assess the traffic impact of existing and new developments, which is valuable knowledge for urban planners and transport engineers.

  • Investigation of antifungal and antibacterial potential of green extracts of propolis
    • Jeslin Cheruvathoor Jenny
    • Piotr Kuś
    • Piotr Szweda
    2024 Pełny tekst Scientific Reports

    Propolis extracts have been used in traditional medicines since ages due to its advantageous complex chemical composition. However, the antibacterial and antifungal activity of poplar propolis extracts prepared in Natural Deep Eutectic Solvent (NADES) are seldom studied. This study investigates suitable alternate for ethanol as a solvent for extraction for Polish poplar propolis. It also attempts to identify suitable extraction condition for the efficient transfer of compounds from propolis to the solvents. The extraction efficiency of NADES extracts was assessed in terms of total phenolic content, antioxidant activity and antimicrobial activity. The chemical composition of the extracts was analysed using UHPLC-DAD-QqTOF-MS. Four extracts, prepared in Propylene Glycol, Choline Chloride:Propylene Glycol (1:3), Choline Chloride:Propylene Glycol (1:4) and Choline Chloride:Glycerol (1:2), demonstrated activity and properties similar to ethanolic extract and extraction at 50 °C was found the most suitable for propolis. HPLC analysis confirmed that the chemical cocktail extracted by these solvents from propolis were identical with minor variations in their concentration as compared to its ethanolic extract. Thus, extracts of propolis at 50 °C in Propylene Glycol, Choline Chloride:Propylene Glycol (1:3) and Choline Chloride:Propylene Glycol (1:4) can be alternates for ethanolic extracts.

  • Investigation of Performance and Energy Consumption of Tokenization Algorithms on Multi-core CPUs Under Power Capping
    • Oksana Diakun
    • Jan Dobrosolski
    • Paweł Czarnul
    2024 Pełny tekst

    In this paper we investigate performance-energy optimization of tokenizer algorithm training using power capping. We focus on parallel, multi-threaded implementations of Byte Pair Encoding (BPE), Unigram, WordPiece, and WordLevel run on two systems with different multi-core CPUs: Intel Xeon 6130 and desktop Intel i7-13700K. We analyze execution times and energy consumption for various numbers of threads and various power caps and demonstrate that energy consumption can be minimized for both CPUs, while metrics such as EDP and EDS could be optimized for the i7-13700K CPU. We further show that percentage energy gain versus execution time loss could be optimized by 3–6% and 7–13%, depending on the algorithm, for the two CPUs respectively, by applying proper non-default power caps.