Mokslas – Lietuvos ateitis / Science – Future of Lithuania
type: channel
description: Science – Future of Lithuania publishes original research written by early career researchers. More information ...
publisher: Vilnius Gediminas Technical University
language: en
publication name: Mokslas – Lietuvos ateitis / Science – Future of Lithuania
issn: 2029-2341
copyright: Authors who publish with this journal agree to the following terms that this article contains no violation of any existing copyright or other third party right or any material of a libelous, confidential, or otherwise unlawful nature, and that I will indemnify and keep indemnified the Editor and THE PUBLISHER against all claims and expenses (including legal costs and expenses) arising from any breach of this warranty and the other warranties on my behalf in this agreement; that I have obtained permission for and acknowledged the source of any illustrations, diagrams or other material included in the article of which I am not the copyright owner. on behalf of any co-authors, I agree to this work being published in the above named journal, Open Access, and licenced under a Creative Commons Licence, 4.0 https://creativecommons.org/licenses/by/4.0/legalcode. This licence allows for the fullest distribution and re-use of the work for the benefit of scholarly information. For authors that are not copyright owners in the work (for example government employees), please contact VILNIUS TECH to make alternative agreements.
items: Geopolymer reinforcement of road embankment slopes under low seismic loading conditions
items: Assessing the progress of EU countries towards achieving the Sustainable Development Goals
items: Impact of influencer’s authenticity and credibility on purchase intention: case of virtual vs. human influencer
items: Reverse logistics as a means of reducing the ecological footprint
items: Evaluation of the quality management systems for aircraft and component manufacturing and maintenance organizations
items: Artificial intelligence (AI) for innovative products development
items: Evaluation of strategic alternatives for corporate-group international expansion
items: Construction development and prospects in Lithuania: a review
items: Creation of a better technological environment in the industrial enterprises
items: Feasibility study of digitalization possibilities of LEAN solutions in unit and small series production
items: The influence of the human factor in decision-making in cyber security exercises
items: Evaluation of Life Cycle Assessment (LCA) and sound absorption properties of composite materials made from coconut and sugarcane fibers
items: Material environment in transitional spaces: theoretical approaches and methodological directions
items: Quality of designed landscapes and the possibilities for their assessment
items: Deflection analysis of composite reinforced concrete elements
items: Creating employee–talent motivation systems in start-up companies
items: Analysis of the structural parameters of engineered wood
items: Dependence of cadmium, lead, and copper speciation on soil pH and temperature using VISUAL MINTEQ
items: Optimization of biogas production from Phragmites australis using first-order kinetic models
items: Investigation of the thermal conductivity of RT58 phase change material during the charging process of a thermal storage tank under natural convection conditions
items: Application of global navigation satellite systems and synthetic aperture radar technology in environmental and earth surface stability research: a reviews
items: Evaluating the integration of apartment building heating systems with low-temperature district heating networks
items: Regional public transport integration in Lithuania
items: Experimental analysis of hydrogen sulfide removal from biogas using a biofilter containing cellular concrete waste and biochar
items: Research on the composting of dog hair waste
items: Reduction of food waste odors with probiotics and baking soda
items: Detection of pneumonia from chest X-rays using convolutional neural networks
items: Integrated approaches to sustainable urban development: the synergy between landscape architecture and civil engineering
items: Lithuania’s economic trajectory in the shadow of the Ukraine conflict
items: Impact of the war in Ukraine on international trade trends

Geopolymer reinforcement of road embankment slopes under low seismic loading conditions
type: item
description: Lithuania is classified as a region of low seismic hazard; however, even low-intensity dynamic actions may affect the stability of marginally stable geotechnical structures. Road embankment slopes are particularly sensitive to changes in stress state caused by traffic loads and dynamic effects. This study evaluates the stability of a road embankment slope reinforced with geopolymer (georesin) columns under static and simplified seismic loading conditions. Slope stability analyses were performed using an analytical limit equilibrium approach implemented in the GEO5 Slope Stability software, applying the Morgenstern–Price method. Dynamic effects were introduced using pseudo-static horizontal and vertical acceleration coefficients Kh and Kv. A dense sand embankment with a height of 5.0 m and a slope angle of 40° was analyzed. Geopolymer reinforcement was simulated using columns with thicknesses of 50 mm, 100 mm, and 150 mm. Stability was evaluated using the utilization factor Vu. The results show that geopolymer reinforcement reduces the utilization factor by approximately 2.5–7.6%, while horizontal dynamic actions increase utilization by approximately 8–9%. Vertical dynamic effects were found to be less critical. The study confirms that geopolymer reinforcement is an effective solution for improving road embankment slope stability in regions of low seismic hazard. Article in English. Geopolimerais sustiprintų kelių pylimų šlaitų stabilumas mažo seisminio aktyvumo sąlygoms Santrauka Lietuva priskiriama mažo seisminio aktyvumo regionui, tačiau net ir nedideli dinaminiai poveikiai gali turėti įtakos ribinio stabilumo praradimui geotechninėse konstrukcijose. Kelių pylimų šlaitai yra ypač jautrūs transporto sukeliamiems dinaminiams poveikiams. Šiame darbe vertinamas geopolimeru sustiprinto kelių pylimo šlaito stabilumas esant statinėms ir supaprastintoms seisminėms apkrovoms. Skaičiavimai atlikti taikant analitinį ribinės pusiausvyros metodą naudojant GEO5 Slope Stability …
subject: Civil Engineering / Statybos inžinerija
  topic: section
subject: geopolymers
  topic: keywords
subject: georesin
  topic: keywords
subject: slope stability
  topic: keywords
subject: road embankments
  topic: keywords
subject: pseudo-static analysis
  topic: keywords
subject: seismic loading
  topic: keywords
subject: ground improvement
  topic: keywords
creator: Mindaugas Zakarka
creator: Aurelijus Sinkevičius
creator: Rokas Karpis
creator: Valdas Kordušas
rights: Copyright (c) 2026 The Author(s). Published by Vilnius Gediminas Technical University. http://creativecommons.org/licenses/by/4.0
date: 2026-04-09
publication date: 2026-04-09
doi: 10.3846/mla.2026.25843

Assessing the progress of EU countries towards achieving the Sustainable Development Goals
type: item
description: This study evaluates the extent to which European Union countries are meeting the Sustainable Development Goals (SDGs). It analyses a range of factors to measure the progress being made. The research pays attention to areas such as reducing poverty, promoting gender equality and examining labour markets. The AHP (Analytic Hierarchy Process) method was utilised to determine the importance of the indicators, while the COPRAS method was applied to evaluate and rank the countries according to the effectiveness of their sustainable development policies. The data indicated that Finland, Denmark, and Sweden are at the leading positions in implementing sustainable development, whereas Germany and Spain show less favourable results. The analysis also showed that the main factors impacting sustainable development are the risk of poverty, the gender unemployment gap and long-term unemployment. Article in English. ES šalių pažangos vertinimas siekiant tvarios plėtros tikslų Santrauka Šiame tyrime vertinama, kiek Europos Sąjungos šalys įgyvendina tvaraus vystymosi tikslus (TVT). Jame analizuojami įvairūs veiksniai, leidžiantys įvertinti padarytą pažangą. Tyrime dėmesys skiriamas tokioms sritims kaip skurdo mažinimas, lyčių lygybės skatinimas ir darbo rinkų tyrimas. AHP (analitinis hierarchinis procesas) metodas buvo taikomas rodiklių svarbai nustatyti, o COPRAS metodas – šalims vertinti ir reitinguoti pagal jų tvaraus vystymosi politikos veiksmingumą. Duomenys rodo, kad Suomija, Danija ir Švedija yra pirmaujančios tvaraus vystymosi įgyvendinimo srityje, o Vokietija ir Ispanija rodo mažiau palankius rezultatus. Analizė taip pat parodė, kad pagrindiniai veiksniai, darantys įtaką tvariai plėtrai, yra skurdo rizika, lyčių nedarbo skirtumas ir ilgalaikis nedarbas. Reikšminiai žodžiai: tvarus vystymasis, TVT, skurdas, lyčių nelygybė, nedarbas, korupcija, socialiniai ir ekonominiai rodikliai.
subject: Economics and Management / Ekonomika ir vadyba
  topic: section
subject: sustainable development
  topic: keywords
subject: SDGs
  topic: keywords
subject: poverty
  topic: keywords
subject: gender inequality
  topic: keywords
subject: unemployment
  topic: keywords
subject: corruption
  topic: keywords
subject: socio-economic indicators
  topic: keywords
creator: Valeriia Yakovenko
creator: Milena Seržantė
rights: Copyright (c) 2026 The Author(s). Published by Vilnius Gediminas Technical University. http://creativecommons.org/licenses/by/4.0
date: 2026-01-20
publication date: 2026-01-20
doi: 10.3846/mla.2026.25026

Impact of influencer’s authenticity and credibility on purchase intention: case of virtual vs. human influencer
type: item
description: This study investigates the influence of influencers’ authenticity and credibility on purchase intention, with a focus on the differences between virtual influencers and human influencers. Using a 2×2 factorial design experiment, the research explores the mediating role of influencer authenticity in the relationship between influencer credibility dimensions (trustworthiness, expertise, and attractiveness), message credibility and consumers’ purchase intentions under the framework of the Information Adoption Model. It further examines the moderating role of the interaction of influencer types (virtual vs. human influencer) and message frame valence (positive vs. negative). The findings reveal that influencers’ perceived trustworthiness and attractiveness are positively associated with the authenticity and purchase intention, whereas expertise does not have a significant impact. Influencer authenticity consistently predicts purchase intention for both virtual and human influencers, regardless of message valence. In contrast, message credibility does not have an impact on purchase intention for virtual influencers delivering negative-framed messages, but it remains a significant antecedent in the other three conditions. Article in English. Nuomonės formuotojo autentiškumo ir patikimumo įtaka pirkimo ketinimams: virtualiųjų ir žmogiškųjų nuomonės formuotojų atvejis Santrauka Šiame tyrime nagrinėjama nuomonės formuotojų autentiškumo ir patikimumo įtaka vartotojų pirkimo ketinimams, daugiausia dėmesio skiriant virtualiųjų ir žmogiškųjų nuomonės formuotojų skirtumams. Taikant 2×2 faktorinio dizaino eksperimentą, tiriamas nuomonės formuotojų autentiškumo tarpininkaujantis vaidmuo ryšyje tarp nuomonės formuotojų patikimumo dimensijų (patikimumo, kompetencijos ir patrauklumo), žinutės patikimumo ir vartotojų pirkimo ketinimų, remiantis informacijos įsisavinimo modeliu. Toliau nagrinėjamas nuomonės formuotojų tipų (virtualusis ir žmogiškasis) ir žinutės rėmelio valentingumo (t…
subject: Economics and Management / Ekonomika ir vadyba
  topic: section
subject: virtual influencer
  topic: keywords
subject: credibility
  topic: keywords
subject: authenticity
  topic: keywords
subject: message frame valence
  topic: keywords
subject: purchase intention
  topic: keywords
subject: factorial design of experiment
  topic: keywords
creator: Yiyuan Ying
creator: Diana Sungailaitė
creator: Vytautas Dikčius
rights: Copyright (c) 2026 The Author(s). Published by Vilnius Gediminas Technical University. http://creativecommons.org/licenses/by/4.0
date: 2026-01-19
publication date: 2026-01-19
doi: 10.3846/mla.2026.25048

Reverse logistics as a means of reducing the ecological footprint
type: item
description: Rapid technological development and related global challenges encourage the industrial sector to seek innovative solutions that would allow it to adapt to increasingly stringent environmental requirements and, at the same time, ensure the sustainability of its operations. Research shows that the industrial sector is experiencing the most significant impact due to growing requirements to reduce negative environmental impacts; therefore, the need to implement environmentally friendly processes is increasing. One of the most promising directions in this area is the integration of reverse logistics into the supply chains of industrial enterprises. Reverse logistics creates the prerequisites for reducing the ecological footprint, rational use of natural esources, reducing waste disposed of in landfills, and optimising energy costs. This article aims to analyse the possibilities of applying reverse logistics and its contribution to reducing the ecological footprint of different industrial sectors. The study is based on a systematic analysis of scientific literature and secondary data. The results of the study can be significant in shaping sustainable industrial policies and helping companies make strategic decisions related to the use of secondary raw materials, waste reduction and management of return product flows. The results of a Life Cycle Assessment (LCA) analysis comparing forward and reverse logistics processes showed that the application of reverse logistics has the potential to improve environmental performance. By modeling different situations, it was determined that reverse logistics is more efficient from an environmental point of view than traditional direct logistics. Article in English. Reversinė logistika kaip ekologinio pėdsako mažinimo priemonė Santrauka Sparti technologinė plėtra ir su ja susiję pasauliniai iššūkiai skatina pramonės sektorių ieškoti novatoriškų sprendimų, kurie padėtų prisitaikyti prie aukštų aplinkosaugos standartų ir užtikrinti veikl…
subject: Economics and Management / Ekonomika ir vadyba
  topic: section
subject: reverse logistics
  topic: keywords
subject: ecological footprint
  topic: keywords
subject: situation simulation
  topic: keywords
subject: industry
  topic: keywords
subject: life cycle assessment
  topic: keywords
creator: Monika Linkevič
rights: Copyright (c) 2025 The Author(s). Published by Vilnius Gediminas Technical University. http://creativecommons.org/licenses/by/4.0
date: 2025-12-30
publication date: 2025-12-30
doi: 10.3846/mla.2025.25017

Evaluation of the quality management systems for aircraft and component manufacturing and maintenance organizations
type: item
description: Ensuring operational efficiency is a critical condition for aviation organizations to maintain high levels of flight safety while remaining competitive. Aircraft and component manufacturing and maintenance organizations are required to comply with European Commission (EC) regulations (EU) No. 1321/2014 and No. 748/2012, which primarily focus on safety rather than broader management aspects. The EN9110:2018 standard based on ISO 9001 principles and of a recommendatory nature, offers an additional opportunity to enhance process efficiency, reduce costs, improve customer satisfaction, and support long-term sustainability. This study aimed to develop a model for assessing the effectiveness of quality management systems specifically adapted to aviation organizations. To achieve this, scientific literature was reviewed, EN9110 requirements were compared with EASA regulations, and expert surveys, interviews, and statistical data analyses were conducted. The resulting model for evaluating the impact of an integrated safety and quality management system enables the identification of relationships between operational efficiency, customer satisfaction, regulatory compliance, and audit outcomes. The findings confirm that the EN9110 standard effectively complements mandatory legal requirements, and its application provides significant benefits when leveraged as a tool for optimizing organizational performance, reducing costs, and enhancing competitive advantage within the aviation sector. Article in Lithuanian. Orlaivių ir komponentų gamybinių bei techninės priežiūros organizacijų kokybės valdymo sistemos vertinimas Santrauka Aviacijos sektoriaus organizacijoms veiklos efektyvumo užtikrinimas yra būtina sąlyga, siekiant išlaikyti skrydžių saugos lygį ir konkurencingumą. Orlaivių bei jų komponentų gamybos ir techninės priežiūros organizacijos įsipareigoja atitikti EK reglamentus (ES) Nr. 1321/2014 ir Nr. 748/2012, kurie labiau orientuoti į saugą, o ne į vadybinius aspektus. Rekom…
subject: Economics and Management / Ekonomika ir vadyba
  topic: section
subject: quality
  topic: keywords
subject: safety
  topic: keywords
subject: management
  topic: keywords
subject: system
  topic: keywords
subject: EN9110 standard
  topic: keywords
subject: evaluation
  topic: keywords
subject: effectiveness
  topic: keywords
subject: aviation
  topic: keywords
creator: Justinas Mikalainis
creator: Živilė Jezerskė
rights: Copyright (c) 2025 The Author(s). Published by Vilnius Gediminas Technical University. http://creativecommons.org/licenses/by/4.0
date: 2025-12-08
publication date: 2025-12-08
doi: 10.3846/mla.2025.25062

Artificial intelligence (AI) for innovative products development
type: item
description: In today’s economic environment, where technological progress is rapid and product life cycles are getting shorter, companies not only need an innovative product development strategy but also an understanding of the factors that determine the success of new products in the market. One solution is the development of innovative products using artificial intelligence. This article aims to investigate how the integration of artificial intelligence affects the process of innovative product development. The article explores the concept of innovation and artificial intelligence, the link between these processes and classification models. A text analysis is carried out according to the developed research methodology. Based on the literature analysis, a popular model of innovative product development is selected. By integrating artificial intelligence into this model, various aspects of its application are examined, such as process automation, data analysis techniques and decision-making improvement. Links between the chosen model and the integration of artificial intelligence are found. A simulation approach is used to propose a structured model to assess the impact of AI on innovative product development. This approach helps to understand the relationships and interconnections between the results and the elements of the empirical study. At the end of the study, a simulation approach is carried out to test the proposed structured model. The paper concludes with conclusions and suggestions. Article in Lithuanian. Dirbtinio intelekto (DI) taikymas inovatyviems produktams kurti Santrauka Dabartinėje ekonominėje aplinkoje, kurioje technologinė pažanga vyksta labai sparčiai, o produktų gyvavimo ciklas trumpėja, įmonėms reikia ne tik inovatyvios produktų kūrimo strategijos, bet ir supratimo apie veiksnius, lemiančius naujų produktų sėkmę rinkoje. Vienas iš sprendimo būdų – inovatyvaus produkto kūrimas pasitelkiant dirbtinį intelektą. Šio straipsnio tikslas – ištirti kaip dirbtini…
subject: Mechanics and Materials Engineering / Mechanika ir medžiagų inžinerija
  topic: section
subject: artificial intelligence
  topic: keywords
subject: artificial intelligence integration
  topic: keywords
subject: innovation strategy
  topic: keywords
subject: innovative product
  topic: keywords
subject: innovative product development
  topic: keywords
subject: simulation method
  topic: keywords
creator: Dovydas Alčauskas
rights: Copyright (c) 2025 The Author(s). Published by Vilnius Gediminas Technical University. http://creativecommons.org/licenses/by/4.0
date: 2025-12-08
publication date: 2025-12-08
doi: 10.3846/mla.2025.24055

Evaluation of strategic alternatives for corporate-group international expansion
type: item
description: In the mobility services sector, where economic, regulatory, technological, competitive and demand factors drive outcomes, rapid change creates a need for a clear, rational decision methodology. To ensure consistent international expansion, this study integrates strategic management and internationalization theory to design a criteria set for corporate-group market evaluation. The set is empirically validated in one mobility-services group using a panel of five senior managers who assessed three Central European markets—Poland, Czechia and Hungary. Criterion weights were obtained with AHP (pairwise comparisons on the Saaty 1–9 scale; consistency ratio CR ≤ 0.10) and alternatives were ranked using TOPSIS. Robustness was tested via sensitivity analysis by systematically varying weights ±10–20% and applying an equal-weights scenario; the ranking did not change. Based on the closeness coefficient, the results rank Czechia first (Ci = 0.626), Poland second (Ci = 0.595) and Hungary third (Ci = 0.306). The conclusions discuss portfolio implications for entry sequencing between short-term rental and long-term leasing models. The study contributes a sector-calibrated, literature-grounded and empirically validated criteria set, an AHP–TOPSIS application with real executive judgments and robustness checks, and a portfolio perspective that enables decisions for the whole corporate group rather than a single brand. Article in Lithuanian. Įmonių grupės tarptautinės plėtros strateginių alternatyvų vertinimas Santrauka Mobilumo paslaugų sektoriuje, kuriame sprendimus lemia ekonominiai, reguliaciniai, technologiniai, konkurenciniai ir paklausos / vartotojų elgsenos veiksniai, spartūs pokyčiai didina poreikį turėti aiškią metodiką sprendimams priimti. Dėl išorinių veiksnių spaudimo tampa būtina vadovautis racionaliu sprendimų priėmimu, kad tarptautinės plėtros sprendimai būtų pagrįsti ir nuoseklūs. Remiantis strateginio valdymo ir internacionalizacijos pagrindinėmis teorijomis, sufor…
subject: Economics and Management / Ekonomika ir vadyba
  topic: section
subject: strategic management
  topic: keywords
subject: internationalization
  topic: keywords
subject: market knowledge
  topic: keywords
subject: AHP
  topic: keywords
subject: TOPSIS
  topic: keywords
subject: mobility services
  topic: keywords
subject: Central Europe
  topic: keywords
subject: port­ folio perspective
  topic: keywords
subject: corporate group
  topic: keywords
creator: Ignas Gustaitis
creator: Paulius Šūmakaris
rights: Copyright (c) 2025 The Author(s). Published by Vilnius Gediminas Technical University. http://creativecommons.org/licenses/by/4.0
date: 2025-12-04
publication date: 2025-12-04
doi: 10.3846/mla.2025.25043

Construction development and prospects in Lithuania: a review
type: item
description: The paper examines the development and current state of the Lithuanian construction sector, focusing on the impact of legal, economic, and technological factors. The aim of the research is to evaluate the dynamics of sectoral growth and to identify possible future changes in line with national priorities and European Union regulations. The applied methods include legal analysis, statistical data review, and comparative analysis. The results revealed key challenges such as workforce shortages, rising costs, and uneven levels of digitalization. The paper presents proposals to promote sustainability, competitiveness, and innovation in the construction sector in the near future and summarizes the Lithuanian construction sector challenge. Article in English. Statybos plėtra ir perspektyvos Lietuvoje: apžvalga Santrauka Straipsnyje nagrinėjama Lietuvos statybos sektoriaus raida ir dabartinė būklė, daugiausia dėmesio skiriant teisinių, ekonominių ir technologinių veiksnių poveikiui. Tyrimo tikslas – pagilinti statybos sektoriaus raidos suvokimą, įvertinant jo augimo dinamiką ir nustatant galimus būsimus pokyčius, atsižvelgiant į nacionalinius prioritetus ir Europos Sąjungos reglamentus. Tyrime taikyti metodai apima teisinę analizę, statistinių duomenų apžvalgą ir lyginamąją analizę. Rezultatai atskleidė pagrindinius sektoriaus iššūkius: darbo jėgos trūkumas, didėjančios išlaidos ir netolygus skaitmeninimo lygis. Straipsnyje pateikiamos rekomendacijos, kaip artimiausiu metu skatinti statybų sektoriaus tvarumą, konkurencingumą ir inovacijas, taip pat apibendrinami pagrindiniai Lietuvos statybų sektoriaus iššūkiai. Reikšminiai žodžiai: BIM, inovacijos, Lietuvos ekonomika, statybos sektorius, teisinė sistema, tvarumas.
subject: Civil Engineering / Statybos inžinerija
  topic: section
subject: BIM
  topic: keywords
subject: innovation
  topic: keywords
subject: Lithuanian economy
  topic: keywords
subject: construction sector
  topic: keywords
subject: legal framework
  topic: keywords
subject: sustainability
  topic: keywords
creator: Darius Kalibatas
creator: Darius Mažulis
rights: Copyright (c) 2025 The Author(s). Published by Vilnius Gediminas Technical University. http://creativecommons.org/licenses/by/4.0
date: 2025-12-01
publication date: 2025-12-01
doi: 10.3846/mla.2025.25057

Creation of a better technological environment in the industrial enterprises
type: item
description: In a fast-changing world, industrial companies have less and less time to find, introduce and implement new ideas, so to keep up with competitors, it is necessary to constantly monitor the external and internal technological and organizational environment of companies, constantly improve processes and properly prepare employees. As the companies starts grow and get bigger profits, top-level leaders start to distance themselves a little from the processes and technological base problems, improvements in the enterprise, this attitude leads to the company stagnation. In order to avoid this and to ensure effective problem solving and enterprise improvements, it needs to create an internal environment improvement model for industrial companies. This article examines the creation of a more perfect technological environment in Lithuanian industrial companies, the factors which influence the improvement of the environment and ways of improvement, described technological environment definition, the employees behaviour towards changes in the company, also article present the methodology for the research, results and the simple (not detailed) model for the improvement of the technological and administrative environment. Article in English. Tobulesnės technologinės aplinkos kūrimas pramonės įmonėse Santrauka Sparčiai kintančiame pasaulyje pramonės įmonės turi vis mažiau laiko naujoms idėjoms generuoti, pristatyti ir įgyvendinti. Norint neatsilikti nuo konkurentų, būtina nuolat stebėti išorinę ir vidinę įmonių technologinę bei organizacinę aplinką, nuolat tobulinti procesus ir tinkamai parengti darbuotojus naujovėms. Įmonėms augant ir gaunant didesnį pelną, aukščiausio lygio vadovai neretai ima po truputį tolti nuo procesų valdymo technologinės bazės problemų sprendimo ir veiklos tobulinimo, o toks požiūris veda į įmonės stagnaciją. Siekiant to išvengti ir užtikrinti efektyvų problemų sprendimą bei įmonės vystymąsi, reikia sukurti pramonės įmonių vidinės aplinkos gerinimo modelį…
subject: Mechanics and Materials Engineering / Mechanika ir medžiagų inžinerija
  topic: section
subject: technological environment
  topic: keywords
subject: industrial enterprises
  topic: keywords
subject: improvement
  topic: keywords
subject: changes
  topic: keywords
subject: process
  topic: keywords
subject: company
  topic: keywords
subject: industry
  topic: keywords
subject: employees resistance
  topic: keywords
subject: implementation
  topic: keywords
subject: manufacturing
  topic: keywords
creator: Barbora Kačinskaitė
rights: Copyright (c) 2025 The Author(s). Published by Vilnius Gediminas Technical University. http://creativecommons.org/licenses/by/4.0
date: 2025-11-25
publication date: 2025-11-25
doi: 10.3846/mla.2025.21778

Feasibility study of digitalization possibilities of LEAN solutions in unit and small series production
type: item
description: Today’s digital technology takes manufacturing to the next level. Digitized systems make it possible to identify potential and existing problems in a timely manner and to discover opportunities for improving the company’s operations by customers’ requirements as quickly as possible. In mass production, digital technologies are already widely implemented and used, which allows large companies to gain production flexibility and advantage. At the same time, large manufacturing companies gaining flexibility pose a great threat to small companies, which are creating unit and small series production. This article presents a study that aims to identify the differences between different types of production, examine digitized LEAN solutions and the latest applied technologies, and relate them to each other. This analysis will allow the selection of the most appropriate solutions for small serial and unit production. A two­stage empirical study was used for this. In the first part, a questionnaire survey determines the companies’ attitude towards digitization, the LEAN tools applied, and the factors that would promote the digitization of processes. The second study compares the organization of production in a company with a low level of digitalization and in a second company with an extremely high level of digitalization. That was done by visiting companies. In a company with a low digitization level, the identified problem points are solved by applying good practices of a digitized company and by arguing from the analyzed literature sources. Article in Lithuanian. LEAN sprendimų skaitmenizacijos galimybių tyrimas vienetinėje ir smulkiaserijinėje gamyboje Santrauka Šiandien skaitmeninės technologijos perkelia gamybos procesą į aukštesnį lygmenį. Jos leidžia laiku nustatyti esamas ir potencialias problemas, atrasti įmonės veiklos gerinimo galimybes ir greičiau patenkinti kliento poreikius. Masinėje gamyboje skaitmeninės technologijos jau plačiai diegiamos ir naudojamos – tai s…
subject: Mechanics and Materials Engineering / Mechanika ir medžiagų inžinerija
  topic: section
subject: Internet of Things (IoT)
  topic: keywords
subject: cloud computing
  topic: keywords
subject: big data
  topic: keywords
subject: artificial intelligence (AI)
  topic: keywords
subject: innovation
  topic: keywords
subject: machine-­to-­machine (M2M)
  topic: keywords
subject: cyber-­physical systems
  topic: keywords
subject: LEAN
  topic: keywords
subject: Industry 4.0
  topic: keywords
subject: digitization
  topic: keywords
subject: 3D
  topic: keywords
subject: unit and small-­series production
  topic: keywords
creator: Kazimieras Masiulis
rights: Copyright (c) 2025 The Author(s). Published by Vilnius Gediminas Technical University. http://creativecommons.org/licenses/by/4.0
date: 2025-11-24
publication date: 2025-11-24
doi: 10.3846/mla.2025.21775

The influence of the human factor in decision-making in cyber security exercises
type: item
description: Cybersecurity is an interdisciplinary field that encompasses aspects of information technology, forensics, incident management, and the human factor. In cyber security, decision-making is influenced by the specialist’s technical knowledge, competencies, and professional experience. However, decisions made in extreme and complex situations are influenced by emotions, motivation, social skills, and cognitive abilities. Therefore, this paper investigated the human factor influencing decision-making of participants in cyber security exercises, and proposed a multidimensional decision-making framework. A study conducted by analyzing the data of the cyber security exercise “Amber Mist” showed that an integrated assessment of technical competencies and the human factor allows for a more accurate determination of the decision-making of a cyber security specialist and its prediction. It was determined that when analyzing decision-making in cyber security exercises, it is necessary to take the human factor into account. The results of the study can be used to improve methodologies and programs for training cyber security specialists. Article in Lithuanian. Žmogiškojo faktoriaus įtaka priimant sprendimus kibernetinės saugos pratybose Santrauka Kibernetinė sauga – tai tarpdisciplininė sritis, apimanti informacinių technologijų, kriminalistikos, incidentų valdymo aspektus bei žmogiškąjį faktorių. Kibernetinėje saugoje sprendimų priėmimą veikia specialisto techninės žinios, kompetencijos, profesinės veiklos patirtis. Tačiau ekstremaliose bei sudėtingose situacijose priimamus sprendimus veikia emocijos, motyvacija, socialiniai įgūdžiai, kognityviniai gebėjimai. Todėl šiame darbe buvo tiriamas žmogiškasis faktorius, darantis įtaką kibernetinės saugos pratybų dalyvių sprendimų priėmimui, ir pasiūlytas daugiamatis sprendimo priėmimo karkasas. Atliktas tyrimas analizuojant kibernetinių saugos pratybų „Gintarinė migla“ duomenis parodė, jog integruotas techninių kompetencijų ir žmogiško…
subject: Information Technologies & Multimedia / Informacinės technologijos ir multimedija
  topic: section
subject: cybersecurity exercises
  topic: keywords
subject: human factor
  topic: keywords
subject: decision making
  topic: keywords
creator: Karina Kulikauskaitė
rights: Copyright (c) 2025 The Author(s). Published by Vilnius Gediminas Technical University. http://creativecommons.org/licenses/by/4.0
date: 2025-11-13
publication date: 2025-11-13
doi: 10.3846/mla.2025.25252

Evaluation of Life Cycle Assessment (LCA) and sound absorption properties of composite materials made from coconut and sugarcane fibers
type: item
description: Agriculture plays a crucial part in the economic growth of several developing nations; however, it creates 1,300 million tons of waste each year, which generates environmental issues. Noise pollution, particularly in urban environments, is an expanding global health issue for emotional and physical health. Conventional synthetic sound absorption materials used for sound absorption pose environmental and health risks; therefore, agricultural wastes including coconut fiber and sugarcane fiber, are being sought for safer alternatives. Natural fibers as sustainable sound-absorbing solutions draw increasing research attention. This paper evaluates the Life Cycle Assessment of agriculture waste based on the SWM-GHG calculator to compare the waste management approaches by calculating the GHG emission related to the recycling and disposal of wastes from cradle to grave, and sound absorption properties of coconut and sugarcane fibers in composite materials. A non-toxic PVA binder was utilized to prepare samples with densities of 75, 100, and 125 kg/m3, and sound absorption was evaluated based on ISO 10534-2. The results show a cost-benefit trade-off in waste management where higher recycling reduces GHG emissions but increases costs; the Default Scenario results in the highest emissions (20,439 t CO2e/yr) at the lowest cost, and Scenario 3 results in the lowest emissions (5,148 t CO2e/yr) at the highest cost. Also, sugarcane fiber (75 kg/m³) achieved the highest absorption coefficient (0.94 at 800 Hz), while coconut fiber (125 kg/m³) reached 0.91 at 1000 Hz, making both suitable for acoustic applications, with coconut fiber excelling in mid to high frequencies and sugarcane fiber in low to mid frequencies, particularly at lower densities. Article in English. Kompozitinių medžiagų iš kokoso bei cukranendrių pluoštų gyvavimo ciklo analizė ir garso sugerties tyrimas Santrauka Žemės ūkis atlieka svarbų vaidmenį augant daugelio besivystančių šalių ekonomikai, tačiau kasmet sukuri…
subject: Environmental Engineering / Aplinkos inžinerija
  topic: section
subject: Life Cycle Assessment
  topic: keywords
subject: greenhouse gas emission
  topic: keywords
subject: coconut fiber
  topic: keywords
subject: sugarcane fiber
  topic: keywords
subject: sound absorption coefficient
  topic: keywords
subject: modelling noise pollution
  topic: keywords
creator: Nuushuun Archie Gboe
creator: Raimondas Grubliauskas
rights: Copyright (c) 2025 The Author(s). Published by Vilnius Gediminas Technical University. http://creativecommons.org/licenses/by/4.0
date: 2025-09-18
publication date: 2025-09-18
doi: 10.3846/mla.2025.24828

Material environment in transitional spaces: theoretical approaches and methodological directions
type: item
description: This article examines the role of material elements of the physical environment in the formation of transitional spaces, with particular attention to their impact on spatial perception and practical use. A review of the literature reveals that the materiality of transitional zones is often overlooked in architectural research, even though these spaces are increasingly recognized as significant components of the contemporary urban environment. The text also outlines the main methodological challenges encountered in systematically investigating the influence of the physical environment on the user‘s spatial experience. Article in English. Daiktinė aplinka pereinamosiose erdvėse: teoriniai požiūriai ir metodologinės kryptys Santrauka Straipsnyje nagrinėjamas materialiųjų daiktinės aplinkos elementų vaidmuo jungiamųjų erdvių formavimo procese, ypatingą dėmesį skiriant jų poveikiui erdvės suvokimui ir praktiniam naudojimui. Literatūros analizė rodo, kad pereinamųjų zonų materialumo aspektas architektūros tyrimuose dažnai lieka paraštėse, nors šios erdvės vis labiau išryškėja kaip reikšmingi šiuolaikinės urbanistinės aplinkos komponentai. Tekste taip pat išskiriami pagrindiniai metodologiniai iššūkiai, su kuriais susiduriama siekiant sistemiškai tirti daiktinės aplinkos įtaką vartotojo erdvinei patirčiai. Reikšminiai žodžiai: daiktinė aplinka, pereinamoji erdvė, medžiagiškumas, erdvės suvokimas, vartotojo patirtis, architektūrinė artikuliacija, aplinkos psichologija.
subject: Architecture / Architektūra
  topic: section
subject: physical environment
  topic: keywords
subject: transitional space
  topic: keywords
subject: materiality
  topic: keywords
subject: spatial perception
  topic: keywords
subject: user experience
  topic: keywords
subject: architectural articulation
  topic: keywords
subject: environmental psychology
  topic: keywords
creator: Mindaugas Užkuraitis
rights: Copyright (c) 2025 The Author(s). Published by Vilnius Gediminas Technical University. http://creativecommons.org/licenses/by/4.0
date: 2025-09-04
publication date: 2025-09-04
doi: 10.3846/mla.2025.24278

Quality of designed landscapes and the possibilities for their assessment
type: item
description: This paper explores the concept of quality and the possibilities of assessing the quality of designed landscapes in an urbanised environment. Quality is examined in the context of urban green space issues. The quality of urban green spaces is an important factor for human health, well-being and the effectiveness of urban green infrastructure. However, its assessment remains a challenge due to different terms, quality data and assessment methods. Drawing on international and national sources, the tangible and intangible dimensions of quality, objective and subjective methods of assessment, and key quality criteria are discussed. Examples from Lithuanian cities (Vilnius, Lazdijai, Naujoji Akmenė) are given, revealing discrepancies between planning decisions and user experience. The paper proposes the integration of evaluation models based on both quantitative and qualitative data, including innovative methods such as the analysis of geographic information provided by social media or smartphone apps. Article in English. Kraštovaizdžio architektūros objektų kokybė ir jos vertinimo galimybės Santrauka Šiame straipsnyje nagrinėjama kraštovaizdžio architektūros objektų kokybės samprata ir vertinimo galimybės urbanizuotoje aplinkoje. Kokybė nagrinėjama analizuojant miesto žaliosios erdvės problematiką. Miesto žaliųjų erdvių kokybė yra svarbus veiksnys žmonių sveikatai, gerovei bei žaliosios miesto infrastruktūros efektyvumui. Tačiau jos vertinimas išlieka iššūkiu dėl skirtingų terminų, kokybės sričių ir vertinimo metodų. Remiantis tarptautiniais ir nacionaliniais šaltiniais, aptariamos pamatuojamos ir nepamatuojamos kokybės dimensijos, objektyvūs ir subjektyvūs vertinimo būdai bei pagrindiniai kokybės kriterijai. Pateikiami pavyzdžiai iš Lietuvos miestų (Vilniaus, Lazdijų, Naujosios Akmenės), atskleidžiantys planavimo sprendimų ir naudotojų patirties neatitikimus. Straipsnyje siūloma integruoti kompleksinius vertinimo modelius, pagrįstus tiek kiekybiniais, tiek kokybiniais …
subject: Architecture / Architektūra
  topic: section
subject: landscape architecture
  topic: keywords
subject: urban green space
  topic: keywords
subject: quality
  topic: keywords
subject: evaluation methods
  topic: keywords
subject: visitor experience
  topic: keywords
creator: Ramunė Baniulienė
rights: Copyright (c) 2025 The Author(s). Published by Vilnius Gediminas Technical University. http://creativecommons.org/licenses/by/4.0
date: 2025-10-17
publication date: 2025-10-17
doi: 10.3846/mla.2025.24153

Deflection analysis of composite reinforced concrete elements
type: item
description: This article examines the deflections of layered reinforced concrete bending elements, which are influenced by interlayer slip. Also, the study shows the work stages of such elements and methods for calculating their deflections. The experimental part analyzes composite reinforced concrete beam stiffness, depending on the shape of reinforcement lattice girders. Based on analytical deflection calculation methods, the deflections of tested beams under various loads are found. The obtained analytical results are compared with experimental data. After analyzing the discrepancies, an analytical method for calculating the deflection of double-layer reinforced concrete elements is developed using regression analysis. The proposed calculation method is applied to both the author’s own and other researchers’ experimental specimens, and a comparison of experimental and analytical results is carried out. Article in Lithuanian. Sluoksniuotųjų gelžbetoninių elementų su erdviniu tinkleliu įlinkio tyrimai Santrauka Straipsnyje nagrinėjami sluoksniuotųjų lenkiamų gelžbetoninių elementų įlinkiai, kurie priklausomi nuo sluoksnių prasislinkimo. Taip pat analizuojami sluoksniuotųjų gelžbetoninių elementų darbo etapai ir jų įlinkių skaičiavimo metodai. Eksperimentinėje dalyje tiriama dvisluoksnio gelžbetoninio elemento erdvinio tinklelio pavidalo įtaka konstrukcijos standumui. Pasirėmus analitiniais įlinkio skaičiavimo metodais, apskaičiuojami išbandytų sijų įlinkiai esant skirtingoms apkrovoms. Gauti analitiniai duomenys palyginami su eksperimentiniais rezultatais. Išanalizavus skirtumus, kuriamas analitinis dvisluoksnių lenkiamų gelžbetoninių elementų įlinkio skaičiavimo metodas, atliekant regresinę analizę. Skaičiavimo metodas pritaikomas asmeniniams ir kitų autorių eksperimentinių tyrimų bandiniams ir atliekamas eksperimentinių ir analitinių rezultatų palyginimas. Reikšminiai žodžiai: sluoksniuotieji gelžbetoniniai elementai, įlinkis, analitinis skaičiavimas, eksperimentinis tyrimas…
subject: Civil Engineering / Statybos inžinerija
  topic: section
subject: composite reinforced concrete elements
  topic: keywords
subject: deflection
  topic: keywords
subject: analytical calculation
  topic: keywords
subject: experimental study
  topic: keywords
subject: interlayer slip
  topic: keywords
subject: interlayer stiffness
  topic: keywords
creator: Julius Viktoras Gedminas
rights: Copyright (c) 2025 The Author(s). Published by Vilnius Gediminas Technical University. http://creativecommons.org/licenses/by/4.0
date: 2025-09-22
publication date: 2025-09-22
doi: 10.3846/mla.2025.24138

Creating employee–talent motivation systems in start-up companies
type: item
description: Employee–talent motivation is a critical factor ensuring the competitiveness and success of a start-up. This article examines the challenges of creating an employee–talent motivation system, highlighting its role in fostering engagement, innovation, and long-term organizational growth. The article analyzes classical and modern motivation theories, emphasizing their importance, applicability, and relevance to the organizational environment of start-ups. It also explores distinctive features of start-ups, such as organizational structure, culture, financial constraints, and competition for talent, and how these factors influence motivation strategies. The key elements of a motivation system – reward systems, incentives, career opportunities, and workplace culture –are discussed with a focus on flexibility, autonomy, innovation, participation in decision-making, and informal work environments. The article provides valuable insights for aspiring entrepreneurs and start-up founders seeking to create effective strategies for attracting and managing talent, ensuring employee retention and engagement under limited financial resources. Article in Lithuanian. Darbuotojų-talentų motyvavimo sistemos kūrimas startuolių įmonėse Santrauka Darbuotojų-talentų motyvacija yra kritinis veiksnys, užtikrinantis startuolio konkurencingumą ir sėkmę. Šiame straipsnyje nagrinėjami darbuotojų-talentų motyvavimo sistemos kūrimo iššūkiai, pabrėžiant jos vaidmenį skatinant įsitraukimą, inovacijas ir ilgalaikį organizacijos augimą. Straipsnyje analizuojamos klasikinės ir šiuolaikinės motyvavimo teorijos, paryškinant jų svarbumą, tinkamumą, būdingą startuolių organizacinei aplinkai. Taip pat analizuojami išskirtiniai startuolių bruožai, tokie kaip organizacinė struktūra, kultūra, finansiniai suvaržymai ir konkurencija dėl talentų ir kaip šie veiksniai daro įtaką motyvavimo strategijai. Pagrindiniai motyvavimo sistemos elementai – atlygio sistema, paskatos, karjeros galimybės ir darbo vietos kultūr…
subject: Economics and Management / Ekonomika ir vadyba
  topic: section
subject: employee motivation
  topic: keywords
subject: start-ups
  topic: keywords
subject: motivation systems
  topic: keywords
subject: talent attraction
  topic: keywords
subject: competition for talent
  topic: keywords
subject: start-up challenges
  topic: keywords
subject: innovation
  topic: keywords
subject: employee engagement
  topic: keywords
creator: Akvilė Šyvokaitė
creator: Danguolė Oželienė
rights: Copyright (c) 2025 The Author(s). Published by Vilnius Gediminas Technical University. http://creativecommons.org/licenses/by/4.0
date: 2025-10-17
publication date: 2025-10-17
doi: 10.3846/mla.2025.24086

Analysis of the structural parameters of engineered wood
type: item
description: This study hypothesises that the tensile strength of wood-duroplastic composites (WDPC) is influenced by wood waste particle size and shape. The research investigated whether variations in the structural composition of wood waste particles have a significant impact on the properties of composite materials. The analysis of the three types of wood waste—door production, packaging, and demolition waste—was conducted following mechanical and chemical treatment. The characterisation of particles was conducted through granulometric analysis and morphological evaluation using ImageJ software. Composite samples were then developed using biopolyurethane binders. Tensile strength tests were conducted after 30 days of curing. The findings of the present study indicated that the morphology of the particles, especially their aspect ratio and circularity, had a significant impact on the strength of the composite materials. Despite their comparatively greater density, attributable to their aluminium content, samples of door waste did not demonstrate superior tensile strength. The present study makes a contribution to the field of sustainable waste reuse strategies and presents practical insights into the development of engineered wood products. Article in English. Dirbtinės medienos struktūrinių parametrų analizė Santrauka Šio tyrimo hipotezė teigia, kad medienos duroplastiko (WDPC) kompozitų tempiamasis stipris priklauso nuo medienos atliekų dalelių dydžio ir formos. Tyrime buvo nagrinėjama, ar skirtinga medienos atliekų dalelių struktūrinė sudėtis veikia kompozitinių medžiagų savybes. Buvo tiriamos trijų tipų medienos atliekos – durų gamybos, pakavimo pramonės bei baldų ir statybos pramonės atliekos – analizę atliekant po mechaninio ir termocheminio atliekų apdorojimo. Dalelėms charakterizuoti buvo nustatinėjama granuliometrinė sudėtis bei kiekvienos rūšies ir frakcijos medienos atliekų dalelių forma, vertinimui naudojant ImageJ programinę įrangą. Atlikus medienos atliekų daleli…
subject: Civil Engineering / Statybos inžinerija
  topic: section
subject: wood waste
  topic: keywords
subject: wood-duroplastic composites
  topic: keywords
subject: tensile strength
  topic: keywords
subject: particle morphology
  topic: keywords
subject: chemical treatment
  topic: keywords
subject: biopolyurethane
  topic: keywords
subject: sustainability
  topic: keywords
subject: granulometry
  topic: keywords
subject: recycling
  topic: keywords
subject: circularity
  topic: keywords
creator: Aurelija Rimkienė
creator: Sigitas Vėjelis
rights: Copyright (c) 2025 The Author(s). Published by Vilnius Gediminas Technical University. http://creativecommons.org/licenses/by/4.0
date: 2025-10-15
publication date: 2025-10-15
doi: 10.3846/mla.2025.24064

Dependence of cadmium, lead, and copper speciation on soil pH and temperature using VISUAL MINTEQ
type: item
description: Soil contamination by heavy metals poses a significant threat to the environment and human health, primarily due to the toxicity of these metals and their ability to accumulate in organisms. To determine how soil pH and temperature affect the chemical speciation, mobility, and immobilization potential of cadmium (Cd²⁺), lead (Pb²⁺), and copper (Cu²⁺). The main hypothesis posits that as pH increases, the concentration of free heavy metals decreases due to the formation of complexes and precipitation, whereas an increase in temperature accelerates the kinetics of chemical reactions, thereby altering metal activity. Using the Visual MINTEQ modeling tool, simulations were carried out under various pH (4–8) and temperature (15–40 °C) conditions. The results showed that at lower pH, metal activity significantly increases; however, the influence of temperature is more complex–both positive and negative trends were observed depending on the metal. These findings provide a foundation for further research, particularly for optimizing strategies to immobilize contaminated soils. Nonetheless, certain observed trends diverged from initial assumptions and called for additional investigation. Article in Lithuanian. Kadmio, švino ir vario specifikacijos priklausomybė nuo dirvožemio pH ir temperatūros naudojant VISUAL MINTEQ Santrauka Dirvožemio užterštumas sunkiaisiais metalais kelia reikšmingą grėsmę aplinkai ir žmonių sveikatai, ypač dėl metalų toksiškumo bei jų gebėjimo kauptis organizmuose. Šio tyrimo tikslas – nustatyti, kaip dirvožemio pH ir temperatūra veikia kadmio (Cd²⁺), švino (Pb²⁺) ir vario (Cu²⁺) cheminę specifikaciją, mobilumą bei imobilizacijos potencialą. Didėjant pH laisvųjų sunkiųjų metalų koncentracija mažėja dėl kompleksų susidarymo ir nusėdimo, o temperatūros padidėjimas paspartina cheminių reakcijų kinetiką, keisdamas metalų aktyvumą. Naudojant VISUAL MINTEQ modeliavimą, atlikta simuliacija esant skirtingoms pH (4–8) ir temperatūros (15–40 °C) sąlygoms. Rezult…
subject: Environmental Engineering / Aplinkos inžinerija
  topic: section
subject: chemical speciation
  topic: keywords
subject: metal mobility
  topic: keywords
subject: heavy metals
  topic: keywords
subject: contaminated soil
  topic: keywords
subject: Visual MINTEQ
  topic: keywords
creator: Vaida Paliulienė
creator: Saulius Vasarevičius
rights: Copyright (c) 2025 The Author(s). Published by Vilnius Gediminas Technical University. http://creativecommons.org/licenses/by/4.0
date: 2025-08-12
publication date: 2025-08-12
doi: 10.3846/mla.2025.23951

Optimization of biogas production from Phragmites australis using first-order kinetic models
type: item
description: This study investigates the viability of Phragmites australis, commonly known as the common reed, as a sustainable feedstock for biogas production, emphasizing the effectiveness of pretreatment techniques to enhance biogas production. Given the invasive nature of Phragmites australis, the utilization of its biomass not only addresses environmental management challenges but also contributes to renewable energy solutions. The key objective is to evaluate mechanical and thermal pretreatment techniques on the anaerobic digestion performance of Phragmites australis using the first-order kinetic model biogas’ cumulative production and volatile solids (VS) degradation were estimated. Sensitivity analysis was used to assess how different degradation rate constants and final biogas yield affected the efficiency of biogas generation. The degradation of VS was significantly accelerated by higher temperatures and finer particle sizes. Results indicate that both mechanical and thermal pretreatment significantly enhance biogas yield and degradation rates, milling (<1 cm) and moderate thermal treatment (100 °C, 2 h) providing optimal results. These studies highlight that the selection of appropriate pretreatment methods should be based on their sustainability and effectiveness in terms of reducing energy consumption and environmental impact. Article in English. Biodujų gamybos iš phragmites australis optimizavimas, taikant pirmojo laipsnio kinetinius modelius Santrauka Šiame darbe tiriamas paprastosios nendrės Phragmites australis panaudojimas biodujų gamybai. Darbe vertinami optimalūs derliaus nuėmimo laikotarpiai bei veiksmingi pirminio apdorojimo metodai, siekiant maksimaliai padidinti metano išeigą. Atsižvelgiant į invazinį Phragmites australis pobūdį, jos biomasės naudojimas ne tik sprendžia su aplinkos taršos mažinimu susijusius iššūkius, bet ir prisideda prie atsinaujinančios energijos gamybos. Šiame tyrime taikomas pirmo laipsnio kinetinis metodas, siekiant ištirti mechani…
subject: Environmental Engineering / Aplinkos inžinerija
  topic: section
subject: anaerobic digestion
  topic: keywords
subject: biogas
  topic: keywords
subject: pretreatment
  topic: keywords
subject: Phragmites australis
  topic: keywords
subject: kinetics
  topic: keywords
creator: Zamira Kazizova
creator: Alvydas Zagorskis
rights: Copyright (c) 2025 The Author(s). Published by Vilnius Gediminas Technical University. http://creativecommons.org/licenses/by/4.0
date: 2025-09-10
publication date: 2025-09-10
doi: 10.3846/mla.2025.23954

Investigation of the thermal conductivity of RT58 phase change material during the charging process of a thermal storage tank under natural convection conditions
type: item
description: As global energy demand grows, more and more attention is being paid to efficient energy storage solutions, among which Phase Change Materials (PCMs) are particularly promising. They allow efficient thermal energy storage by using the latent heat that is absorbed or released during the transformation of the aggregate state. One of the most important properties of PCM for efficient heat transfer is the thermal conductivity. Unfortunately, it is not high for organic materials. This paper presents a study of RT58 PCM, presenting an experimental evaluation of the thermal conductivity of this material and the application of the material in a storage tank. The analytical evaluation focuses on the heat transfer under natural convection conditions, where the aim is to assess the influence of the thermal conductivity of the PCM on the amount of energy stored in the storage tank. In this case, the temperature of the heating surface, the magnitude of the thermal conductivity coefficient and the choice of the other PCM are considered. The experimental results allowed to refine the value of the thermal conductivity coefficient of the RT58 material used (0.188 W/(mK)) and the analytical calculations allowed to trend towards an increase of the heat exchange efficiency of the system with the PCM. Article in Lithuanian. RT58 fazinio virsmo medžiagos šilumos laidumo koeficiento tyrimas natūralios konvekcijos sąlygomis akumuliacinės talpos įkrovimo metu Santrauka Didėjant pasaulinei energijos paklausai, vis daugiau dėmesio skiriama efektyviems energijos kaupimo sprendimams, tarp kurių itin perspektyvios yra fazinio virsmo medžiagos (FVM). Jos leidžia efektyviai saugoti šiluminę energiją naudojant latentinę šilumą, kuri sugeriama arba išskiriama agregatinės būsenos virsmo metu. Viena iš svarbiausių FVM savybių efektyviems šilumos mainams yra šilumos laidumo koeficientas. Deja, organinių medžiagų atveju jis nėra aukštas. Šiame straipsnyje pateikiama RT58 FVM tyrimas, kuriame pristatomas…
subject: Environmental Engineering / Aplinkos inžinerija
  topic: section
subject: phase change material
  topic: keywords
subject: natural convection
  topic: keywords
subject: heat transfer
  topic: keywords
subject: thermal conductivity coefficient
  topic: keywords
creator: Giedrė Streckienė
creator: Gustas Viganauskas
creator: Eldar Rynkevič
creator: Artūras Banuškevičius
rights: Copyright (c) 2025 The Author(s). Published by Vilnius Gediminas Technical University. http://creativecommons.org/licenses/by/4.0
date: 2025-08-07
publication date: 2025-08-07
doi: 10.3846/mla.2025.23942

Application of global navigation satellite systems and synthetic aperture radar technology in environmental and earth surface stability research: a reviews
type: item
description: Environmental monitoring technologies have advanced, offering reliable data to assess and mitigate the impacts of climate and ecosystem changes on the planet. Global Navigation Satellite Systems (GNSS) and Synthetic Aperture Radar (SAR) technology have contributed to this progress. The combined use of GNSS and SAR enriches environmental assessments, supporting programs for climate monitoring, water cycle analysis, and vegetation mapping. This integration is also crucial for tracking the movement of Earth’s tectonic plates and monitoring its stability, with GNSS measuring precise surface displacements and SAR providing detailed images of ground deformation. Several models and systems have been developed for large-scale global area monitoring, where GNSS and SAR data provide accurate measurements used to evaluate various parameters such as soil moisture, vegetation cover, glacier melting, and more. GNSS and SAR are widely used in monitoring tectonic plate shifts and Earth’s stability. A study conducted by the European Earth Movement Monitoring Service in the Kirkilai sinkhole area, covering 5.9 hectares, found that the system uses only four measurement points in such an area, which does not fully describe the situation of height changes over time. Therefore, it would be beneficial to create a local model or system for monitoring the Lithuanian territory using the same GNSS and SAR technologies. Article in Lithuanian. Pasaulinės navigacijos palydovų sistemų ir sintetinės apertūros radarų technologijos pritaikymas aplinkos ir žemės paviršiaus stabilumo tyrimuose: apžvalga Santrauka Aplinkos stebėjimo technologijos pažengė į priekį, siūlydamos patikimus duomenis planetos klimato ir ekosistemų pokyčiams vertinti ir pasekmėms mažinti. Pasaulinės navigacijos palydovų sistemos (GNSS) ir sintetinės apertūros radaro (SAR) technologija prisidėjo prie šio progreso. GNSS ir SAR papildomas naudojimas leidžia praturtinti aplinkos vertinimus, palaikant programas klimatui stebėti, va…
subject: Environmental Engineering / Aplinkos inžinerija
  topic: section
subject: GNSS
  topic: keywords
subject: SAR
  topic: keywords
subject: InSAR
  topic: keywords
subject: environmental monitoring
  topic: keywords
subject: climate changing
  topic: keywords
subject: land stability research
  topic: keywords
creator: Rokas Bražiūnas
creator: Jūratė Sužiedelytė Visockienė
rights: Copyright (c) 2025 The Author(s). Published by Vilnius Gediminas Technical University. http://creativecommons.org/licenses/by/4.0
date: 2025-08-08
publication date: 2025-08-08
doi: 10.3846/mla.2025.23943

Evaluating the integration of apartment building heating systems with low-temperature district heating networks
type: item
description: Any renovation of apartment buildings by replacing or keeping their heating devices usually means that high temperatures of the heat carrier are maintained, which restricts boosting the efficiency of a central heating supply system. This also limits the scope for a switch to more efficient systems such as low-temperature district heating systems. To assess the impact of reducing the heat carrier temperature on indoor heating with a constant radiator area, the article investigates several alternatives alongside a base case scenario. In one scenario, the modernization of a building is examined, either by retaining the current heating devices or by substituting them with devices of equal size. Another scenario explores the modernization of a building by exchanging the heating devices and adjusting the building’s heating system to accommodate ultra-low temperatures. The possibility to reduce the temperature of the heat carrier in the heating system without any renovation of the building has been addressed as well. This led to seven alternatives. The analysis of the hourly data of the heating system model for two typical months in a heating season has revealed that when the building retains its existing area of heating devices post-renovation, the temperature can be brought down to 60/40/20 °C. It was also discovered that lowering the heat transfer temperature to ultra-low parameters (45/25/20 °C) cannot be achieved by refurbishing the buildings without increasing the number of radiators, as the heating devices will fail to deliver adequate heat for space heating. Article in English. Daugiabučių namų šildymo sistemų integravimo į žemos temperatūros centralizuoto šilumos tiekimo tinklus vertinimas Santrauka Daugiabučių namų renovacija, keičiant ar paliekant jų šildymo prietaisus, paprastai reiškia, kad reikia išlaikyti aukštą šilumnešio temperatūrą, o tai riboja centralizuoto šilumos tiekimo (CŠT) sistemos efektyvumo didinimą. Be to, tai apriboja galimybę pereiti prie efe…
subject: Environmental Engineering / Aplinkos inžinerija
  topic: section
subject: district heating (DH)
  topic: keywords
subject: building modernization
  topic: keywords
subject: heating system
  topic: keywords
subject: low-temperature
  topic: keywords
creator: Giedrė Streckienė
creator: Juozas Bielskus
creator: Artur Rogoža
creator: Vilūnė Lapinskienė
creator: Violeta Misevičiūtė
rights: Copyright (c) 2025 The Author(s). Published by Vilnius Gediminas Technical University. http://creativecommons.org/licenses/by/4.0
date: 2025-09-12
publication date: 2025-09-12
doi: 10.3846/mla.2025.23939

Regional public transport integration in Lithuania
type: item
description: Regional public transport organization helps to avoid additional route coordination, public transport service should not be limited to the boundaries of municipalities, which is currently regulated by the Law on Local Self-Government of the Republic of Lithuania. Cooperation shortens the organization time, optimizes costs and promotes efficiency. The regional transport service network or individual routes are prepared and operated based on available unified qualitative and quantitative data, insights, and proposals. The purpose of the study is to compare and assess the level of integration of public transport between the city and the ring municipality according to selected criteria. The study was conducted by analyzing the strategic planning documents of 3 main ring municipalities of Lithuania and surveys of residents conducted during the planning processes. When comparing the three ring municipalities of Lithuania according to the selected criteria, the highest level of public transport integration was achieved in Klaipėda district municipality, where all the main integration indicators were achieved. Article in Lithuanian. Regioninė viešojo transporto integracija Lietuvoje Santrauka Regioninis viešojo transporto organizavimas padeda išvengti papildomo maršrutų derinimo, viešojo transporto paslauga neturėtų būti ribojama savivaldybių ribų, tai dabar reglamentuojama LR vietos savivaldos įstatymu. Bendradarbiaujant sutrumpinamas organizavimo laikas, optimizuojamos sąnaudos bei skatinamas efektyvumas. Regioninio transporto paslaugų tinklas ar atskiri maršrutai yra rengiami ir eksploatuojami remiantis turimais bendrais kokybiniais ir kiekybiniais duomenimis, įžvalgomis, pasiūlymais. Tyrimo tikslas –pagal pasirinktus kriterijus palyginti ir įvertinti viešojo transporto tarp miesto ir žiedinės savivaldybės integracijos lygį. Tyrimas darytas analizuojant 3 pagrindinių žiedinių Lietuvos savivaldybių strateginius planavimo dokumentus, planavimo procesuose atliktas gyventojų…
subject: Environmental Engineering / Aplinkos inžinerija
  topic: section
subject: public transport
  topic: keywords
subject: regional integration
  topic: keywords
subject: public transport data
  topic: keywords
subject: transport planning
  topic: keywords
creator: Andrius Samuilovas
creator: Rasa Ušpalytė-Vitkūnienė
rights: Copyright (c) 2025 The Author(s). Published by Vilnius Gediminas Technical University. http://creativecommons.org/licenses/by/4.0
date: 2025-09-10
publication date: 2025-09-10
doi: 10.3846/mla.2025.23940

Experimental analysis of hydrogen sulfide removal from biogas using a biofilter containing cellular concrete waste and biochar
type: item
description: This study investigates the removal efficiency of hydrogen sulfide (H₂S) from biogas using a biofilter packed with cellular lightweight concrete (CLC) waste and biochar. A laboratory-scale biofilter was designed and tested under varying operational and environmental conditions, including inlet H₂S concentrations (100–2000 ppm), gas flow rates (0.2–1.0 L/min), temperature (25–35 °C), and humidity (70–90%). The results demonstrated that H₂S removal efficiency reached 95% at low air flow rates and 91% under low H₂S concentrations. In comparison, efficiency declined to 88% at high air flow rates and 87% at high H₂S concentrations. The combination of biochar’s adsorption properties and Fe₂CO₃-modified CLC waste’s catalytic oxidation contributed to the biofilter’s high efficiency and stability. These findings suggest that hybrid biofilters incorporating waste-derived materials provide an environmentally sustainable and cost-effective alternative for biogas purification compared to conventional chemical and physical methods. Article in English. Eksperimentinis biodujų valymo nuo sieros vandenilio tyrimas, taikant biofiltrą su akytojo betono atliekų ir bioanglies įkrovomis Santrauka Šiame tyrime nagrinėjamas sieros vandenilio (H₂S) šalinimo iš biodujų efektyvumas, naudojant biofiltrą, užpildytą akytojo lengvojo betono atliekomis ir bioanglimi. Laboratorinis biofiltras buvo suprojektuotas ir išbandytas esant skirtingoms eksploatacinėms sąlygoms: keičiant pradinę H₂S koncentraciją (100–2000 ppm), dujų srautų greitį (0,2–1,0 L/min), temperatūrą (25–35 °C) ir drėgmę (70–90 %). Tyrimo rezultatai parodė, kad H₂S šalinimo efektyvumas siekė 95 % esant mažiems oro srautams ir esant nedidelėms pradinėms H₂S koncentracijoms. Palyginimui, kai dideli oro srautai – efektyvumas sumažėjo iki 88 %, o padidėjus H₂S koncentracijoms – efektyvumas sumažėjo iki 87 %. Aukštą biofiltro efektyvumą ir stabilumą lėmė bioanglies adsorbcinės savybės bei Fe₂CO₃ modifikuotų akytojo lengvojo betono atliek…
subject: Environmental Engineering / Aplinkos inžinerija
  topic: section
subject: hydrogen sulfide removal
  topic: keywords
subject: biofilter
  topic: keywords
subject: biochar
  topic: keywords
subject: cellular concrete (CLC) waste
  topic: keywords
subject: microbial desulfurization
  topic: keywords
subject: biogas purification
  topic: keywords
creator: Kamyab Mohammadi
creator: Rasa Vaiškūnaitė
rights: Copyright (c) 2025 The Author(s). Published by Vilnius Gediminas Technical University. http://creativecommons.org/licenses/by/4.0
date: 2025-08-21
publication date: 2025-08-21
doi: 10.3846/mla.2025.23937

Research on the composting of dog hair waste
type: item
description: Waste management is one of the most important environmental areas for protecting the environment and human health. Biowaste decomposes and releases pollutants into the environment if left unmanaged or improperly managed. With the increasing demand for pet (especially dog) hairdressing all over the world, it is natural that the amount of discarded waste from animal fur care is also increasing. Dog hair waste can be used for the production of yarns and insulation materials, for the production of filters, and for co-posting. Composting of dog hair was chosen for the study because of its high nitrogen content and because it is one of the simplest ways to use dog hair waste. The main parameters of the composting process are analysed in the paper: C, N, ratio, pH, temperature, moisture content and electrical conductivity measurements. Article in Lithuanian. Šunų plaukų atliekų kompostavimo tyrimas Atliekų tvarkymas yra viena svarbiausių aplinkosaugos sričių siekiant tausoti aplinką ir žmonių sveikatą. Biologiškai skaidžios atliekos, netvarkomos arba netinkamai tvarkomos, pūva ir į aplinką išskiria teršalus. Didėjant naminių gyvūnų (ypač šunų) kirpyklų paklausai visame pasaulyje, natūralu, kad didėja ir išmetamų gyvūnų kailio priežiūros atliekų kiekiai. Šunų plaukų atliekos gali būti naudojamos siūlų ir termoizoliacinių medžiagų gamybai, filtrų gamybai, kompostuojamos ir kt. Buvo atliktas kompostavimo tyrimas, nes šiose atliekose yra daug azoto (100 gramų plaukų yra apie 15 % azoto), taip pat tai yra vienas iš paprasčiausių būdų, kaip galima panaudoti šunų plaukų atliekas. Straipsnyje analizuojami pagrindiniai kompostavimo proceso parametrai: C, N, pH, temperatūra, drėgmė, elektrinis laidis. Reikšminiai žodžiai: šunų plaukai, atliekos, kompostavimas, biologiškai skaidžios atliekos.
subject: Environmental Engineering / Aplinkos inžinerija
  topic: section
subject: dog hair
  topic: keywords
subject: waste
  topic: keywords
subject: composting
  topic: keywords
subject: biodegradable waste
  topic: keywords
creator: Rugilė Balbierytė
creator: Eglė Marčiulaitienė
rights: Copyright (c) 2025 The Author(s). Published by Vilnius Gediminas Technical University. http://creativecommons.org/licenses/by/4.0
date: 2025-09-02
publication date: 2025-09-02
doi: 10.3846/mla.2025.23938

Reduction of food waste odors with probiotics and baking soda
type: item
description: Food waste management is an important challenge for environmental protection, especially due to the unpleasant odors emitted. This study analyzes the effects of probiotics and baking soda on food waste odor reduction. The research was conducted using the dynamic olfactometry method, assessing odor concentration in different types of food waste: fish waste, dairy product waste, meat waste, and plant-based waste, i.e., fruit and vegetable waste. The experiment is carried out by placing 1 kilogram of food waste in 5-liter containers. The duration of the study is 7 days. The results showed that probiotics are more effective in reducing odors than baking soda, especially in fish and fruit and vegetable waste. Article in Lithuanian. Maisto atliekų išskiriamų kvapų mažinimas probiotikais ir valgomąja soda Santrauka Maisto atliekų tvarkymas yra svarbus aplinkos apsaugos iššūkis, o kartu ir iš atliekų skleidžiami nemalonūs kvapai. Šiame tyrime analizuojamas probiotikų ir valgomosios sodos poveikis maisto atliekų kvapų mažinimui. Tyrimas atliktas taikant dinaminės olfaktometrijos metodą, vertinant kvapo koncentraciją skirtingose maisto atliekų rūšyse: žuvies atliekose, pieno produktų atliekose, mėsos atliekose bei augalinės kilmės atliekose, t. y. vaisių ir daržovių atliekose. Eksperimentas atliktas maisto atliekas sudėjus po 1 kilogramą į 5 litrų talpyklas. Tyrimo trukmė 7 dienos. Gauti rezultatai parodė, kad probiotikai efektyviau sumažina kvapus nei valgomoji soda, ypač žuvies, vaisių ir daržovių atliekose. Reikšminiai žodžiai: maisto atliekos, kvapų mažinimas, dinaminės olfaktometrijos metodas, probiotikai, valgomoji soda (NaHCO₃).
subject: Environmental Engineering / Aplinkos inžinerija
  topic: section
subject: food waste
  topic: keywords
subject: odor reduction
  topic: keywords
subject: dynamic olfactometry method
  topic: keywords
subject: probiotics
  topic: keywords
subject: baking soda (NaHCO₃)
  topic: keywords
creator: Erika Kašėtaitė
creator: Eglė Marčiulaitienė
rights: Copyright (c) 2025 The Author(s). Published by Vilnius Gediminas Technical University. http://creativecommons.org/licenses/by/4.0
date: 2025-09-02
publication date: 2025-09-02
doi: 10.3846/mla.2025.23936

Detection of pneumonia from chest X-rays using convolutional neural networks
type: item
description: Pneumonia detection from chest X-rays is crucial for early diagnosis, and deep learning models –specifically convolutional neural networks (CNNs) – have shown promise in automating this process. In this study, a CNN using the DenseNet-121 architecture was developed and trained, referred to as LDCS2, to classify chest X-ray images as pneumonia or normal, using a combined dataset from three publicly available sources. The CNN approach was chosen over Vision Transformers (ViT) due to lower computational requirements and better performance with limited data. A traditional training, validation, and testing split was used instead of k-fold cross-validation to reduce execution time. LDCS2 demonstrated excellent discrimination between pneumonia and normal images alongside high computational efficiency. These findings highlight the potential of DenseNet-based CNNs for automated pneumonia diagnosis, particularly in resource-constrained settings. Article in English. Pneumonijos nustatymas iš krūtinės ląstos rentgenogramų, naudojant konvoliucinius neuroninius tinklus Santrauka Pneumonijos nustatymas iš krūtinės ląstos rentgenogramų yra itin svarbus ankstyvajai diagnostikai, o giliojo mokymosi modeliai – ypač konvoliuciniai neuroniniai tinklai (CNN) – rodo didelį potencialą automatizuojant šį procesą. Šiame tyrime sukurtas ir apmokytas CNN, paremtas DenseNet-121 architektūra ir pavadintas LDCS2, skirtas klasifikuoti krūtinės ląstos rentgeno vaizdams, iš kurių matyti pneumonija arba sveiki plaučiai, naudojant sujungtą duomenų rinkinį iš trijų viešai prieinamų šaltinių. CNN metodas pasirinktas vietoje Vision Transformers (ViT) dėl mažesnių skaičiavimo išteklių reikalavimų ir geresnių rezultatų, kai duomenų kiekis ribotas. Siekiant sutrumpinti vykdymo laiką, vietoje k kartų kryžminės validacijos taikytas tradicinis mokymo, validacijos ir testavimo skaidymas. LDCS2 pademonstravo puikią atskyrimo gebą tarp pneumonijos ir sveikų plaučių vaizdų bei aukštą skaičiavimo efektyvumą. Šie re…
subject: Information Technologies & Multimedia / Informacinės technologijos ir multimedija
  topic: section
subject: LDCS2
  topic: keywords
subject: Convolutional Neural Networks (CNNs)
  topic: keywords
subject: chest X-ray classification
  topic: keywords
subject: pneumonia detection
  topic: keywords
subject: DenseNet-121
  topic: keywords
subject: medical imaging
  topic: keywords
subject: deep learning in healthcare
  topic: keywords
subject: data augmentation
  topic: keywords
subject: transfer learning
  topic: keywords
creator: Paulius Bundza
creator: Justas Trinkūnas
rights: Copyright (c) 2025 The Author(s). Published by Vilnius Gediminas Technical University. http://creativecommons.org/licenses/by/4.0
date: 2025-09-29
publication date: 2025-09-29
doi: 10.3846/mla.2025.23905

Integrated approaches to sustainable urban development: the synergy between landscape architecture and civil engineering
type: item
description: This research study addresses the developing synergy between landscape architecture and civil engineering in the context of sustainable urban development. The study intends to analyze how these multidisciplinary professions might collectively handle urban difficulties while assuring long-term environmental, social, and economic sustainability. Using the PRISMA technique, the study thoroughly reviewed secondary data from the Scopus database, identifying 23 relevant publications published between 2015 and 2024. The study outlines major integration techniques, obstacles, and emerging trends that impact the cooperation between various disciplines. The results emphasize major impediments to successful multidisciplinary collaboration, including policy fragmentation, inadequate cross-disciplinary education, and technology adaption issues. Additionally, the research underlines the significance of merging theoretical frameworks and practical case studies to increase the knowledge of integrated urban development techniques. By offering a comprehensive examination of the literature, this study adds to a greater knowledge of interdisciplinary urban planning solutions and gives significant insights for policymakers, academics, and practitioners working toward resilient and adaptable urban environments. Article in English. Integruotas požiūris į darnią miestų plėtrą: kraštovaizdžio architektūros ir statybos inžinerijos sinergija Santrauka Šiame tyrime nagrinėjama besivystanti kraštovaizdžio architektūros ir statybos inžinerijos sinergija darnios miestų plėtros kontekste. Tyrimu siekiama išanalizuoti, kaip šios daugiadisciplinės profesijos galėtų kartu spręsti miesto urbanistinius iššūkius, kartu užtikrindamos ilgalaikį aplinkos, socialinį ir ekonominį tvarumą. Taikant PRISMA metodą, tyrime išsamiai peržiūrėti antriniai duomenys iš Scopus duomenų bazės, nustatyti 23 susiję leidiniai, paskelbti 2015–2024 m. Tyrime nurodomi pagrindiniai integracijos būdai, kliūtys ir naujos tendenci…
subject: Architecture / Architektūra
  topic: section
subject: sustainability
  topic: keywords
subject: urban development
  topic: keywords
subject: landscape architecture
  topic: keywords
subject: civil engineering
  topic: keywords
creator: Sulaksha Wimalasena
creator: Thilina Ganganath Weerakoon
creator: Jayathma Wimalasena
rights: Copyright (c) 2025 The Author(s). Published by Vilnius Gediminas Technical University. http://creativecommons.org/licenses/by/4.0
date: 2025-04-07
publication date: 2025-04-07
doi: 10.3846/mla.2025.22836

Lithuania’s economic trajectory in the shadow of the Ukraine conflict
type: item
description: The ongoing situation between Russia and Ukraine has sent shockwaves through Europe, impacting the economies of nearby nations like Lithuania. Lithuania, a member of the European Union, finds itself in a complicated position due to its historical and political connections to Russia and Ukraine. Using such methodology as literature review, correlation, and regression analysis, structural equation modelling this research dives into how war is affecting Lithuania’s economy, including changes in trade, energy security, and relocation of investments. Because of the sanctions against Russia, an important trading partner for Lithuania, their usual trade routes have been thrown off. This has forced Lithuania to look for new markets and other places to get energy. At the same time, Lithuania has had to spend more on its military and faces greater uncertainty because of the conflict, which has changed fiscal policies and investor confidence. The conflict has also sped up Lithuania’s move towards Western markets and strengthened its employment market. This paper takes a deep dive into Lithuania’s economic journey within the changing landscape of security, economic indicators, and policy reactions. The results emphasize both the weaknesses and strengths of Lithuania’s economy in the face of ongoing geopolitical conflict. Article in English. Lietuvos ekonominė trajektorija Ukrainos konflikto šešėlyje Santrauka Šiuo metu vykstanti situacija tarp Rusijos ir Ukrainos sukėlė didelį atgarsį Europoje, paveikdama ir netoliese esančių šalių, tokių kaip Lietuva, ekonomikas. Lietuva, kaip Europos Sąjungos narė, atsidūrė sudėtingoje padėtyje dėl savo istorinių ir politinių ryšių su Rusija ir Ukraina. Taikant tokius metodus kaip literatūros apžvalga, koreliacijos ir regresinė analizė, struktūrinių lygčių modeliavimas, šiame tyrime gilinamasi į tai, kaip karas veikia Lietuvos ekonomiką – įskaitant prekybos pokyčius, energetinį saugumą ir investicijų perskirstymą. Dėl sankcijų Rusijai, kuri y…
subject: Economics and Management / Ekonomika ir vadyba
  topic: section
subject: geopolitical conflict
  topic: keywords
subject: economic growth
  topic: keywords
subject: war
  topic: keywords
subject: economic stability
  topic: keywords
creator: Kseniia Kizilova
rights: Copyright (c) 2025 The Author(s). Published by Vilnius Gediminas Technical University. http://creativecommons.org/licenses/by/4.0
date: 2025-05-22
publication date: 2025-05-22
doi: 10.3846/mla.2025.23389

Impact of the war in Ukraine on international trade trends
type: item
description: The ongoing war in Ukraine, which began in 2014, has significantly disrupted global trade, particularly in energy, agriculture, and supply chains. This study integrates economic, trade, and geopolitical theories with empirical data to analyse the conflict’s immediate and long-term effects on international trade. Key findings reveal a sharp decline in Ukraine’s agricultural exports, with grain and oilseed shipments dropping over 40% since 2022, exacerbating global shortages. Fertilizer exports from both Russia and Ukraine have also plummeted, causing a 70% increase in global prices and impacting agricultural productivity in countries like Bangladesh, Egypt, and India. In response, nations have reshuffled trade partnerships, with Egypt increasing wheat imports from India and Brazil, and Indonesia turning to Australia and China for fertilizers, albeit with higher costs and logistical challenges. The conflict has led to a 20% rise in global food prices, worsening food insecurity, especially in vulnerable regions. The study underscores the need for diversified supply sources, enhanced domestic agricultural production, and resilient supply chains to mitigate the impacts of geopolitical conflicts on global trade and food security. Article in English. Ukrainos karo įtaka tarptautinės prekybos tendencijoms Santrauka Besitęsiantis karas Ukrainoje, prasidėjęs 2014 metais, smarkiai sutrikdė pasaulinę prekybą, ypač energetikos, žemės ūkio ir tiekimo grandinių srityse. Šiame tyrime ekonominės, prekybos ir geopolitinės teorijos yra derinamos su empiriniais duomenimis, siekiant išanalizuoti konflikto tiesiogines ir ilgalaikes įtakas tarptautinei prekybai. Pagrindiniai tyrimo rezultatai atskleidžia staigų Ukrainos žemės ūkio eksporto mažėjimą, javų ir aliejinių sėklų eksportas nuo 2022 metų sumažėjo daugiau nei 40 %, dar labiau pablogindamas pasaulinį maisto produktų trūkumą. Trąšų eksportas tiek iš Rusijos, tiek iš Ukrainos taip pat smarkiai sumažėjo, dėl to pasaulinės kainos išaug…
subject: Economics and Management / Ekonomika ir vadyba
  topic: section
subject: global trade
  topic: keywords
subject: Ukraine war
  topic: keywords
subject: fertilizer and wheat market volatility
  topic: keywords
subject: agricultural exports
  topic: keywords
subject: food security implications
  topic: keywords
creator: Tymur Kosormyhin
rights: Copyright (c) 2025 The Author(s). Published by Vilnius Gediminas Technical University. http://creativecommons.org/licenses/by/4.0
date: 2025-05-23
publication date: 2025-05-23
doi: 10.3846/mla.2025.23399