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: 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
items: Application of smart technologies in water management analysis
items: Model justifying the need for professional competencies in the field of aviation
items: Evaluation of organizational commitment of military aviation pilots: the case of the Lithuanian Air Force
items: A review of aquatic plant biomass pretreatment methods for biogas production
items: Possibilities of applying a low-temperature centralized heat supply network in a multi-apartment building district
items: Improvement of incident management model using machine learning methods
items: Research and analysis of the potential use of plastic waste from the mechanical processing of plastics

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

Application of smart technologies in water management analysis
type: item
description: More and more regions of the world are suffering due to urbanization and emerging industries. Therefore, water extraction and water management become a priority issue globally. Scientists are beginning to implement the most modern technologies and use sustainable development and sustainable construction solutions which would help solve water management problems. The article analyses the application of the most advanced technologies in water management, which increase the efficiency of buildings in the operational phase and help to implement the goals of sustainable development and sustainable construction. The study found that AI (Artificial Intelligence) and IoT (Internet of Things) technologies can be applied in many areas of water management. For example, monitoring and prevention of engineering network accidents, water distribution in engineering networks, wastewater treatment, water desalination processes, selection of efficient water-saving engineering solutions, flood prevention and implementation of sustainable construction. The implementation of the most modern technologies benefit citizens, state institutions, water management companies and the ecosystem. Article in Lithuanian. Išmaniųjų technologijų taikymo vandentvarkoje analizė Santrauka Urbanizacija, naujų pramonės šakų plėtra ir auganti populiacija lemia, kad vis daugiau regionų susiduria su vandens trūkumu. Dėl to vandens gavybos ir valymo klausimai tampa prioritetiniai, o mokslininkai taiko pažangias technologijas ir darnios plėtros sprendimus vandentvarkos problemoms spręsti. Todėl šiame tyrime siekiama išsiaiškinti naujausių ir pažangiausių technologijų, didinančių pastatų efektyvumą eksploatacijos etape bei padedančių įgyvendinti darnios plėtros ir tvarios statybos tikslus, taikymo lauką vandentvarkos srityje. Tyrime nustatyta, kad dirbtinio intelekto ir daiktų interneto technologijas galima pritaikyti daugelyje vandentvarkos sričių, pavyzdžiui, inžinerinių tinklų avarijoms stebėti ir prevencijai…
subject: Civil Engineering / Statybos inžinerija
  topic: section
subject: water management
  topic: keywords
subject: wastewater treatment
  topic: keywords
subject: Internet of Things
  topic: keywords
subject: artificial intelligence
  topic: keywords
subject: water desalination
  topic: keywords
subject: sustainable construction
  topic: keywords
subject: sustainable development
  topic: keywords
creator: Gintarė Piaseckienė
creator: Jurgita Antuchevičienė
rights: Copyright (c) 2024 The Author(s). Published by Vilnius Gediminas Technical University. http://creativecommons.org/licenses/by/4.0
date: 2024-12-30
publication date: 2024-12-30
doi: 10.3846/mla.2024.21359

Model justifying the need for professional competencies in the field of aviation
type: item
description: Around 11.3 million people work in the aviation sector worldwide. During 2020 and 2021, thousands of highly skilled aviation professionals lost their jobs or were retired. After easing travel restrictions in 2022, aviation began to recover rapidly, which was and still is a major challenge for the sector. Along with financial and technological challenges, there is the issue of retraining employees and renewing their competencies. In this era of non-stop progress, the main goal of the players in the aviation sector is to keep up with the changes. Artificial intelligence (AI) tools are rapidly being integrated in aviation operations, systems are being automated and ongoing digitization helps to manage increasing flow of information or travelers. Technological, digital, or regulatory changes create a constant need for new and diverse competencies in this field, which becomes a vital need for the sector to survive in the market. This article aims to review the regulations of competencies necessary for those working in aviation and create models to justify the need for professional competencies in aviation. It would reflect the constantly changing environment and its influence on aviation organizations. Therefore, the biggest challenge is to create a model as a sufficient tool to assess the need for competence in work activities. Article in Lithuanian. Profesinių kompetencijų poreikio aviacijos srityje pagrindimo modeliai Santrauka Aviacijos sektoriuje priskaičiuojama maždaug 11,3 mln. dirbančių žmonių. Per 2020 ir 2021 metus, COVID-19 pandemijos metu, tūkstančiai aukštos kvalifikacijos aviacijos specialistų buvo atleisti arba išėjo į pensiją. 2022 metais atlaisvėjus ribojimams keliauti, aviacija sparčiai pradėjo atsigauti, nors organizacijoms vis dar išlieka iššūkių. Greta finansinių ir technologinių iššūkių atsiranda darbuotojų susigrąžinimo ir jų kompetencijų atnaujinimo klausimas. Šiuo nesustojančio progreso laikotarpiu pagrindinis aviacijos sektoriaus dalyvių tikslas…
subject: Economics and Management / Ekonomika ir vadyba
  topic: section
subject: competencies
  topic: keywords
subject: aviation
  topic: keywords
subject: regulations
  topic: keywords
subject: changes
  topic: keywords
subject: competency model
  topic: keywords
creator: Egidija Lekarevičienė
creator: Rolandas Drejeris
rights: Copyright (c) 2024 The Author(s). Published by Vilnius Gediminas Technical University. http://creativecommons.org/licenses/by/4.0
date: 2024-11-08
publication date: 2024-11-08
doi: 10.3846/mla.2024.21619

Evaluation of organizational commitment of military aviation pilots: the case of the Lithuanian Air Force
type: item
description: Commitment to the organization has a significant connection with operational productivity, turnover, employee satisfaction and loyalty, affects the quality and efficiency of work, facilitates staffing challenges, enables the organization to properly and efficiently use its human resources. Aviation professionals often change organizations in the hope of better working conditions: better pay, a safer work environment and a more favorable working climate in the workplace. Therefore, it is important to strengthen the organizational commitment of aviation personnel in order to maintain qualified employees and specialists and ensure the successful operation of the organization. In the face of new threats and tasks set for the Lithuanian Air Force (LAF), more funding is allocated for their implementation, and the number and the need for personnel is growing. The aim of the article is to study the expression of pilots‘ organizational commitment in LAF and the factors that determine it, using Meyer‘s and Allen (1991) three­dimensional model of organizational commitment. After conducting the research, it was found that the expression of organizational commitment of LAF pilots is low, emotional commitment is slightly higher, while continuous commitment is low. A negative relationship between holding civilian commercial pilot‘s license and organizational commitment was discovered. Article in Lithuanian. Karinės aviacijos pilotų organizacinio įsipareigojimo vertinimas: Lietuvos karinių oro pajėgų atvejis Santrauka Organizacinis įsipareigojimas – tai darbuotojo požiūris į organizaciją, atsikleidžiantis tikėjimą organizacijos vertybėmis, įsitraukimą į organizaciją kaip socialinę sistemą, tapatinimąsi su ja ir ketinimus likti dirbti. Įsipareigojimas organizacijai turi reikšmingą sąsają su veiklos produktyvumu, apyvarta, darbuotojų pasitenkinimu ir lojalumu, turi įtakos darbo kokybei ir efektyvumui, palengvina personalo komplektavimo iššūkius, įgalina organizaciją tinkamai ir efekt…
subject: Economics and Management / Ekonomika ir vadyba
  topic: section
subject: Lithuanian air force
  topic: keywords
subject: military aviation
  topic: keywords
subject: pilots
  topic: keywords
subject: organizational commitment
  topic: keywords
subject: factors of organizational commitment
  topic: keywords
subject: emotional commitment
  topic: keywords
subject: continuous commitment
  topic: keywords
subject: normative commitment
  topic: keywords
creator: Liudmila Lobanova
creator: Mindaugas Židonis
rights: Copyright (c) 2024 The Author(s). Published by Vilnius Gediminas Technical University. http://creativecommons.org/licenses/by/4.0
date: 2024-10-24
publication date: 2024-10-24
doi: 10.3846/mla.2024.21731

A review of aquatic plant biomass pretreatment methods for biogas production
type: item
description: The increasing global demand for renewable energy sources has led to interest in generating biogas from aquatic plant biomass. This research examines the pretreatment methods of biomass, aiming to enhance the efficiency of biogas production processes. The analysis presents mechanical, chemical, biological, or combined pretreatment techniques, assessing their respective advantages, limitations, and potential synergies. The review extends beyond individual methodologies to identify potential synergies or sequential applications that could maximize biogas production efficiency. This study ultimately facilitates moving the field forward, contributes to the transition to more sustainable energy solutions, identifies gaps in existing researches, paving the way for future investigations and combat to solve upcoming energy problems. Article in English. Vandens augalų biomasės pirminio apdorojimo biodujų gamybai metodų apžvalga Santrauka Pasaulyje didėjanti atsinaujinančių energijos išteklių paklausa paskatino susidomėjimą biodujų gamyba iš vandens augalų biomasės. Šiame darbe nagrinėjami biomasės pirminio apdorojimo metodai, kuriais siekiama padidinti biodujų gamybos procesų efektyvumą. Analizėje pateikiami mechaniniai, cheminiai, biologiniai arba kombinuoti pirminio apdorojimo būdai, įvertinami atitinkami jų pranašumai, trūkumai ir galima sinergija. Darbas apima atskirų metodų apžvalgą, kad būtų galima nustatyti galimas sinergijas arba nuoseklius pritaikymus, kurie galėtų padidinti biodujų gamybos efektyvumą. Šis darbas prisideda prie energijos gamybos sektoriaus pažangos ir tvaresnių energijos sprendimų, išryškina esamų taikymo metodų spragas bei atveria kelią sprendžiant būsimas energetikos problemas. Reikšminiai žodžiai: anaerobinis skaidymas, biodujos, mikrodumbliai, pirminis apdorojimas, vandens biomasė, bioreaktorius.
subject: Environmental Engineering / Aplinkos inžinerija
  topic: section
subject: anaerobic digestion
  topic: keywords
subject: biogas
  topic: keywords
subject: microalgae
  topic: keywords
subject: preatreament
  topic: keywords
subject: aquatic biomass
  topic: keywords
subject: biorector
  topic: keywords
creator: Zamira Kazizova
creator: Alvydas Zagorskis
rights: Copyright (c) 2024 The Author(s). Published by Vilnius Gediminas Technical University. http://creativecommons.org/licenses/by/4.0
date: 2024-06-04
publication date: 2024-06-04
doi: 10.3846/mla.2024.21313

Possibilities of applying a low-temperature centralized heat supply network in a multi-apartment building district
type: item
description: Lithuania‘s district heating (DH) network tends to maintain high heat transfer temperatures, which limit the efficiency of the system. The aim of this study is to assess the impact of DH and reduced heat transfer temperature in the building on space heating and the possibility of reducing the heat transfer temperature (down to 60 °C) in the DH network by looking at different scenarios and the heat demand of buildings. Three alternatives were analysed: the installation of a temperature-lowering module (mixing unit) in the thermal chamber and the retro-fitting of existing piping and heating appliances, where the temperature of the DH fluid is lowered up to 60 °C and the temperature of the radiators is lowered to 60/40/20. The possibility of lowering the DH heat transfer temperature without upgrading the network by installing heat pumps individually in the buildings or in the heat chamber is examined. An hourly data analysis of a 2-year heating system model for a typical building showed that lowering the DHW temperature to 60 °C and leaving the existing area of heating appliances in the building will not meet the heat demand of the buildings. Article in Lithuanian. Žemos temperatūros centralizuoto šilumos tiekimo tinklo pritaikymo galimybės daugiabučių namų kvartale Santrauka Lietuvos centralizuotuose šilumos tiekimo tinkluose dažniausiai išlaikomos aukštos šilumnešio temperatūros, kurios apriboja sistemos efektyvumo didinimą. Straipsnyje siekiama įvertinti centralizuoto šilumos tiekimo tinklo (CŠT) ir pastate sumažėjusios šilumnešio temperatūros įtaką patalpų šildymui bei šilumnešio temperatūros žeminimo galimybes (iki 60 °C) CŠT tinkle apžvelgiant skirtingus scenarijus bei siekiant užtikrinti pastatų šilumos poreikius. Buvo analizuojamos 2 alternatyvos: temperatūras žeminančio modulio (pamaišymo mazgo) šiluminėje kameroje įrengimas bei esamų vamzdynų ir šildymo prietaisų modernizacija, kai žeminama CŠT šilumnešio temperatūra iki 60 °C, o radiatorių temperatūrinis gra…
subject: Environmental Engineering / Aplinkos inžinerija
  topic: section
subject: district heating
  topic: keywords
subject: 4th generation district heating
  topic: keywords
subject: temperature of the heating system lowering
  topic: keywords
subject: heat pump
  topic: keywords
creator: Edita Rugieniūtė
creator: Juozas Bielskus
rights: Copyright (c) 2024 The Author(s). Published by Vilnius Gediminas Technical University. http://creativecommons.org/licenses/by/4.0
date: 2024-06-13
publication date: 2024-06-13
doi: 10.3846/mla.2024.21317

Improvement of incident management model using machine learning methods
type: item
description: Technical support of IT infrastructure is a crucial aspect of organizational operations, with the most challenging task being ensuring service continuity. Quality support guarantees high IT efficiency, but complex incidents reduce support quality and require effective management. Incident management includes configuration processes and control of technical solutions. To improve technical support, adhering to both quantitative and qualitative standards and considering system specifics is necessary. According to service level agreements (SLA), the resolution time of incidents is important. „Service Desk“ tools, applying machine learning methods, can help optimize these processes. Incorrectly classified user requests lead to additional work for the IT team and delay incident resolution. Machine learning methods, such as K-means clustering, Random Forest regression, and classification, can optimize incident management and speed up resolution time. The research analyzes „Service Desk“ incident data to model resolution times and improve incident management. Article in Lithuanian. Incidentų valdymo modelio tobulinimas, taikant mašininio mokymosi metodus Santrauka IT infrastruktūros techninis palaikymas yra esminis organizacijos veiklos aspektas, kurio sudėtingiausia užduotis yra užtikrinti veikimo tęstinumą. Kokybiškas palaikymas garantuoja aukštą IT efektyvumą, tačiau sudėtingi incidentai sumažina palaikymo kokybę ir reikalauja veiksmingo valdymo. Incidentų valdymas apima konfigūracijų procesus ir techninių sprendimų kontrolę. Siekiant pagerinti techninį palaikymą, būtina laikytis tiek kiekybinių, tiek kokybinių standartų ir atsižvelgti į sistemų specifiką. Pagal paslaugų lygio sutartis (SLA) svarbus incidentų sprendimo laikas. „Service Desk“ įrankiai, taikant mašininio mokymosi metodus, gali padėti optimizuoti šiuos procesus. Naudotojų neteisingai klasifikuotos užklausos lemia papildomą IT komandos darbą ir vilkina incidentų sprendimą. „K-means“ klasterizacijos, „Random …
subject: Information Technologies & Multimedia / Informacinės technologijos ir multimedija
  topic: section
subject: IT infrastructure
  topic: keywords
subject: technical support
  topic: keywords
subject: incident management
  topic: keywords
subject: incident resolution time
  topic: keywords
subject: Service Desk
  topic: keywords
subject: machine learning methods
  topic: keywords
subject: request classification
  topic: keywords
creator: Roman Jevsejev
creator: Mindaugas Bereiša
rights: Copyright (c) 2024 The Author(s). Published by Vilnius Gediminas Technical University. http://creativecommons.org/licenses/by/4.0
date: 2024-06-06
publication date: 2024-06-06
doi: 10.3846/mla.2024.21633

Research and analysis of the potential use of plastic waste from the mechanical processing of plastics
type: item
description: Plastic is increasingly used worldwide and is becoming an essential part of everyday life. There are many scientific articles on recycling or recycling methods for plastics, but so far there are few solutions for the use of the waste generated by plastic de-waste treatment processes. Proper management of plastic waste can reduce the negative impact on the environment and human beings. In this paper, the waste generated during the mechanical processing of plastic is investigated its suitability for biofilter loading. In this way, the amount of plastic waste generated could be reduced and the air could be cleaned from unpleasant odours and other pollutants generated during the treatment of plastic waste. Article in Lithuanian. Plastiko mechaninio apdorojimo atliekų tyrimai ir panaudojimo galimybių analizė Santrauka Plastikas visame pasaulyje naudojamas vis dažniau ir tampa kasdienio gyvenimo dalimi. Yra nemažai mokslinių straipsnių apie plastiko perdirbimą ar perdirbimo būdus, tačiau iki šiol yra nedaug sprendimų, kaip panaudoti plastiko atliekų apdorojimo procesuose susidarančias atliekas. Tinkamai tvarkant plastiko atliekas, galima sumažinti neigiamą poveikį aplinkai ir žmogui. Šiame darbe tiriamos plastiko mechaninio apdorojimo metu susidarančių atliekų savybės ir jų tinkamumas panaudoti kaip oro valymo biofiltro įkrova. Naudojant šias atliekas kaip biofiltro įkrovą, būtų galima mažinti susidarančių plastiko atliekų kiekį ir atsirastų galimybė valyti nemalonius kvapus ir kitus teršalus iš oro, susidarančių plastiko atliekų apdorojimo ar kituose pramonės procesuose. Reikšminiai žodžiai: plastikas, plastiko atliekos, mechaninis apdorojimas, oro valymo biofiltro įkrova.
subject: Environmental Engineering / Aplinkos inžinerija
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subject: plastic
  topic: keywords
subject: plastic waste
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subject: mechanical processing
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subject: biofilter bed
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creator: Emilija Galeckaitė
creator: Eglė Marčiulaitienė
rights: Copyright (c) 2024 The Author(s). Published by Vilnius Gediminas Technical University. http://creativecommons.org/licenses/by/4.0
date: 2024-06-06
publication date: 2024-06-06
doi: 10.3846/mla.2024.21323