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A comparative analysis of the innovation environment in South Africa and Lithuania
No full textFor comparative research into the innovation environments of different countries a duplicatable measurable
method of analysis needs to be used to identify similarities and differences. This paper aims to analyse the environment
in which entrepreneurial innovation takes place comparatively through a duplicatable and measurable method. The
analysis method and its results set out in this article will form the basis of a larger research study that focuses on how
the ecosystem in which an entrepreneur functions influences their creativity and innovation. The analysis in this article
is done by utilising PESTLE and SWOT analyses on the Global Innovation Index (GII) rankings of South Africa (a developing
country) and Lithuania (a developed country). Utilising the PESTLE analysis on the innovation ranking data
enables a graphical representation of the environments in which innovation occurs. In turn, the SWOT analysis allows
for identifying strengths, weaknesses, opportunities and threats to innovation within the country’s environment and in
comparison, to the other. This results in a repeatable analysis method that allows for comparing different ecosystems
in which entrepreneurs function. It is this standardised method which enables the larger body of work focusing on the
ecosystem influence on an entrepreneur’s creativity and innovation.Taip / Ye
Biblioteka informuoja, 2025 Nr. 22 (719)
No full textNaujai į Web of Science ir Scopus įtrauktų Vilnius Gedimino technikos darbuotojų publikacijų sąrašai ir kitos bibliotekos aktualijos.22 (719)202
Biomasės pelenų naudojimo dirvožemio kokybei gerinti apžvalga: galimi privalumai ir taikymo galimybės
No full textThe degradation of urban soil is caused by pollution, poor land management practices, and soil sealing, all of
which lead to lower infiltration, aeration, and permeability. At the same time, there is a substantial increase in biomass
power generation, which increases ash generation, posing concerns for waste management and environmental impact.
Biomass ash presents an opportunity for an environmentally friendly amendment of soil, as it provides nutrients, stabilises
pH, and improves soil structure. The ash is rich in vital nutrients such as calcium, potassium, and phosphorus,
which can restore nutrient-stripped soil and counteract soil acidification. The porous nature of ash improves aeration,
retention of water, and root growth, especially in sandy and degenerated soil. Pelletisation makes it easier for biomass
ash utilisation by reducing airborne dissemination and ensuring nutrient release occurs in a controlled, graduated process.
Empirical evidence shows that granulated biomass ash can release its contents of nutrients in a gradual process,
hence avoiding surpassing the safety levels of maximum allowable concentrations of heavy metals. With appropriate
practices, biomass ash is a valid alternative to fertilisers, improving agricultural output and environmental sustainability
and reducing the by-product troubles of biomass power generation.Dirvožemio kokybė blogėja dėl žmogaus veiklos,
ypač dėl didėjančio užterštumo, netinkamos priežiūros ir
dirvožemio uždengimo įvairiomis dangomis. Tokie pokyčiai
mažina infiltraciją, biologinį aktyvumą ir dirvožemio pralaidumą.
Tuo pat metu, spartus biomasės energijos gamybos
augimas lėmė didesnį susidarančių biomasės pelenų kiekį,
keldamas susirūpinimą dėl atliekų apdorojimo ir poveikio aplinkai. Tačiau biomasės pelenai gali būti tvarus sprendimas
dirvožemio kokybei gerinti. Biomasės pelenai, kuriuose
gausu pagrindinių maistinių medžiagų, tokių kaip kalcis, kalis
ir fosforas, gali papildyti dirvožemį, kuriame šių maistinių
medžiagų trūksta, taip pat sušvelninti dirvožemio rūgštėjimą.
Dėl savo porėtos struktūros biomasės pelenai pagerina dirvožemio
aeraciją, vandens sulaikymą ir šaknų įsiskverbimą,
ypač smėlinguose ir degradavusiuose dirvožemiuose. Tokie
metodai kaip granuliavimas pagerina biokuro pelenų panaudojimą,
nes sumažina galimą sklaidą ore pelenams išdžiūvus
ir tiekia lėtą maistinių medžiagų išsiskyrimą. Tyrimai parodė,
kad tinkamai apdorotos pelenų granulės gali palaipsniui atiduoti
maistines medžiagas, neviršydamos leistinų sunkiųjų
metalų koncentracijos ribų. Gerai tvarkomi biomasės pelenai
yra perspektyvus cheminių trąšų pakaitalas, didinantis žemės
ūkio produktyvumą ir aplinkos tvarumą, taip pat mažinantis
biomasės energijos šalutinių produktų problemas.Taip / Ye
15th International Conference BIOMDLORE 2025
No full textThe primary objectives of this conference are to provide a dynamic forum for scientists to present their most recent research findings in the fields of biomechanics and biomedical engineering, as well as to foster the establishment of new professional contacts within these disciplines. We extend a cordial invitation to all scientists, engineers, physicians, and entrepreneurs engaged in the broad areas of biomechanics and biomedical engineering. Participants are encouraged to share their expertise, exchange knowledge, gain valuable experience, and build meaningful new relationships during the conference. Scope of Conference: Biomechanics, Locomotion, Orthopedics and Traumatology, Compensatory Equipment, Rehabilitation, Medical Diagnostics, Biosignal’s Analysis, Mathematical ModelingIntersurgicalKavitaOrtopedijos technikaSanovusAnmeda TechnaMoo
Biblioteka informuoja, 2025 Nr. 3 (700)
No full textNaujai į Web of Science ir Scopus įtrauktų Vilnius Gedimino technikos darbuotojų publikacijų sąrašai ir kitos bibliotekos aktualijos.3 (700)202
A study of decentralized finance auditing using financial technologies
No full textThis article explores the application of financial technologies in the auditing of decentralized finance (DeFi) and
how these technologies can improve the audit process. The research aims to identify the main challenges faced in DeFi auditing
and to offer recommendations for strengthening audit methodologies using financial technologies (FinTech). The article
discusses decentralized finance and its innovative management principles based on blockchain technology, which fundamentally
transforms traditional financial systems. The study identifies key risks associated with DeFi, such as vulnerabilities in
smart contracts and the lack of regulatory frameworks. The theoretical foundation includes a detailed analysis of the differences
between traditional and decentralized finance, highlighting DeFi’s advantages – lower operational costs, greater accessibility,
and transparency – while addressing regulatory and security challenges. The research methodology is based on scientific
literature analysis and the classification of FinTech tools according to established criteria to evaluate the effectiveness of
audit methods and their potential for improvement. The main findings show that FinTech tools, such as artificial intelligence
(e.g., decision tree models) and blockchain technology, enhance the reliability and speed of DeFi audits while highlighting the
need for a more robust regulatory system. This article is relevant due to the rapid growth of the DeFi sector and its importance
in the digital transformation of the financial industry. Moreover, this research aims to classify the most widely used financial
technology tools according to their functions and analyze their impact on traditional and decentralized finance auditing processes,
offering insights for improving audit methodologies.Taip / Ye
Biblioteka informuoja, 2025 Nr. 10 (707)
No full textNaujai į Web of Science ir Scopus įtrauktų Vilnius Gedimino technikos darbuotojų publikacijų sąrašai ir kitos bibliotekos aktualijos.10 (707)202
Sustainability in industry: assessing responsible production practices in Kazakhstan
No full textResponsible production is critical to sustainable industrial development, yet its implementation varies across
sectors. This study investigates the state of responsible production practices in Kazakhstan, focusing on environmental
compliance, operational efficiency, and employee well-being. A structured survey was conducted among 100 Kazakh
enterprises across key industrial sectors, including metallurgy, mechanical engineering, and energy production. The
survey utilised proportional sampling to ensure representation, and data were systematically analysed using SPSS for
statistical processing. Descriptive and comparative analyses were conducted to identify trends, challenges, and sectoral
differences. The results reveal that while most companies report moderate improvements in operational efficiency,
significant challenges remain in environmental responsibility. Only a small percentage allocate resources for ecological
investments. Waste management and reverse logistics are underdeveloped, with many companies lacking structured
recycling and sustainability initiatives. Although 80% of firms report some engagement in eco-innovations, adopting
advanced technologies remains limited. Employee well-being initiatives, including workplace improvements and insurance
coverage, are widely implemented, but psychological support services remain inconsistent. These findings highlight
both progress and persistent gaps in responsible production in Kazakhstan, underscoring the need for stronger
regulatory frameworks, increased investment in eco-innovation, and a shift toward circular economy principles.Taip / YesScience Committee of the Ministry of Science and Higher Education of the Republic of KazakhstanAP1957659
Assessment of the development of the European Union’s airport sector under economic globalization conditions
No full textObject of research: the development and assessment of the European Union’s airport sector under economic
globalization. This study conducts a comprehensive analysis of economic globalization theories, examining the key
drivers of globalization, their effects on various economic sectors, and their specific linkages to transportation infrastructure.
Considering the European Union’s economic policies and transport sector development strategies, the study
evaluates the existing assessment tools used to measure economic globalization in the airport sector. The research provides
an in-depth examination of the effects of specific globalization processes – economic integration, capital mobility,
trade liberalization, and digitalization – on the European Union’s airport sector. To empirically assess the impact
of globalization conditions on airport operations, a comparative analysis of the development of major EU airports has
been conducted. This analysis evaluates key indicators such as passenger flows, cargo volumes, infrastructure investments,
and the accessibility of air transport services, considering the influence of globalization factors. The empirical
part of the study employs Pearson correlation analysis to identify linear relationships between passenger numbers,
flight frequency, and key macroeconomic indicators, including GDP growth and inflation rates. The research focuses
on the airport sector of the Baltic states, analysed as a specific regional area that provides insights into the impact of
globalization on smaller yet strategically significant EU markets. The findings of the study contribute to a deeper understanding
of globalization trends in the air transport sector and offer policy recommendations for further integrating
the EU’s air transport system into the global economy.Taip / Ye
Aukštos temperatūros poveikiams atsparaus betono kompozito kūrimas ir mechaninių savybių analizė
No full textRefractory castables, or refractory aggregates and ultra-fine particles mixed with calcium aluminate cement and deflocculants, were created in the 1980s to protect industrial furnaces operating at high temperatures in metallurgy, chemistry, and the petrochemical industry. These materials demonstrate outstanding performance even over 1000 °C and can withstand compressive stresses, which emerge in typical applications due to high temperatures and mechanical loads. The extraordinary material performance has led to interest in using these materials for developing building protection systems against fires and explosions. Still, this application requires structural reinforcement to resist tensile stresses in the concrete caused by mechanical loads, making the bonding of reinforcement crucial. The different temperature expansion properties of the castables and reinforcement steel further complicate the bar interaction mechanisms with concrete. The dissertation conducts extensive tests to evaluate various combinations of refractory and reinforcing materials to develop a reinforced composite resilient to thermal and mechanical loads. These tests revealed the acceptable efficiency of conventional castables (CC), analysing the material cost and bond resistance balance. However, the typical CC strength of 50 MPa is insufficient to ensure the bonding performance of steel bars after treatment at 400 °C, and the plain bars lose their bond with the concrete, regardless of the concrete strength, due to the different thermal expansion properties of the materials. On the contrary, ribbed stainless Type 304 steel bars and the CC material, modified with 2.5% micro-silica (by weight of dry materials) to achieve a 100 MPa cold compressive strength (CCS), are promising candidates for developing the refractory composite. A finite element model has also been created to predict steel reinforcement’s bonding performance in refractory castables under a temperature impact of up to 1000 °C.
The dissertation includes an introduction, three chapters, general conclusions, and a list of references. The First Chapter reviews the literature on testing methodologies and reinforcement behaviour in refractory composites under high temperatures, identifying gaps in existing research. The Second Chapter describes the experimental programme, detailing the testing setup, materials used, and data collected from materials characterisation, pull-out experiments, and bending beam tests. The Third Chapter analyses experimental results and develops a finite element model to simulate the bond behaviour of stainless-steel reinforcement in refractory concrete after high-temperature treatment. The author’s list of publications on the dissertation topic consists of three journal articles (indexed in the Web of Science database with an Impact Factor) and three conference presentations.Ugniai atsparūs betonai arba ugniai atsparių užpildų ir itin smulkių priedų mišiniai su kalcio aliuminato cementu ir deflokuliantais buvo sukurti praeito amžiaus devintą dešimtmetį, siekiant apsaugoti metalurgijos ir naftos perdirbimo pramonės aukštakrosnes nuo aukštos temperatūros poveikio. Šie betonai išlaiko savo savybes esant aukštesnei nei 1000 °C temperatūrai ir atlaiko gniuždymo įtempius, atsirandančius dėl aukštų temperatūrų ir mechaninių apkrovų poveikio. Dėl išskirtinių savybių šie betonai pradėti plačiau tyrinėti, siekiant juos pritaikyti statybinėms konstrukcijoms kaip apsaugą nuo gaisrų ir sprogimų. Tuo tikslu konstrukcijas būtina armuoti ir taip užtikrinti jų atsparumą tempimo įtempiams, atsirandantiems dėl mechaninių apkrovų poveikio. Todėl itin svarbu, kad būtų užtikrintas armatūros sukibimas su betonu, nes esant aukštoms temperatūroms sukibimo įtempių būvis kinta veikiamas skirtingų betono ir plieninės armatūros šiluminio plėtimosi. Disertacijoje atlikti išsamūs tyrimai, siekiant įvertinti įvairius ugniai atsparių betonų ir armatūros derinius bei sukurti šiluminiams ir mechaniniams poveikiams atsparų kompozitą. Tyrimai atskleidė, kad tradiciniai betonai pasižymi priimtinomis savybėmis, atsižvelgiant į medžiagų kainą ir sukibimo atsparumą, tačiau įprastas jų gniuždymo stipris (50 MPa) yra nepakankamas, kad užtikrintų plieninių strypų sukibimą temperatūrai pasiekus 400 °C; lygaus paviršiaus armatūros strypai praranda sukibimą su betonu nepriklausomai nuo betono stiprio (dėl medžiagų šiluminio plėtimosi skirtumų). Priešingai, rumbuotų nerūdijančiojo plieno (304 klasės) strypų ir tradicinių ugniai atsparių betonų, modifikuotų 2,5 % masės silicio oksido mikrodalelėmis, užtikrinant 100 MPa gniuždymo stiprį (kai bandiniai buvo pakaitinti aukštoje temperatūroje ir savaime atvėso), derinys pasirodė perspektyvus kurti ugniai atsparų betono kompozitą. Be to, sukurtas baigtinių elementų modelis leidžia prognozuoti plieninės armatūros sukibimo su ugniai atspariais betonais elgseną kaitinant medžiagą iki 1000 °C.
Disertaciją sudaro įvadas, trys skyriai, bendrosios išvados ir literatūros sąrašas. Pirmame skyriuje nagrinėjamos bandymų metodikos ir armatūros elgsena ugniai atspariuose kompozituose, veikiant aukštoms temperatūroms, taip pat identifikuojamos esamos literatūros tyrimų spragos. Antrame skyriuje aprašoma eksperimentinė programa, naudotos medžiagos ir surinkti duomenys iš armatūros tempimo, armatūros ištraukimo iš betono kubelių bei sijų lenkimo bandymų. Trečiame skyriuje analizuojami gauti eksperimentiniai rezultatai ir kuriamas baigtinių elementų modelis, skirtas nerūdijančiojo plieno armatūros sukibimo su betonu elgsenai modeliuoti, kai bandinys buvo pakaitintas aukštoje temperatūroje ir savaime atvėso. Disertacijos tema parengtų publikacijų sąrašą sudaro 3 straipsniai moksliniuose žurnaluose (referuojamuose Web of Science duomenų bazėje) ir 3 straipsniai tarptautinių konferencijų medžiagoje