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Prve analize vodnega vira iz Savinjske statistične regije
Tina Kodrin, 2024, undergraduate thesis

Abstract: V diplomskem delu je prikazana prva analiza vodnega izvira z območja Savinjske statistične regije, ki že več let preskrbuje manjše število gospodinjstev s pitno vodo. V vseh teh letih še ni bilo izvedenih ustreznih analiz, s katerimi bi potrdili ustreznost vode in primernost le te za uživanje. Cilj diplomskega dela je izvesti prvo analizo omenjenega vodnega izvira in določiti kakovost vode z uporabo fizikalno-kemijskih analiz in mikrobiološke analize. Fizikalno-kemijske analize smo izvedli v treh različnih časovnih obdobjih. Določili smo vsebnost splošnih parametrov v vodi, vsebnost kovin in trdoto vode. V sodelovanju z Nacionalnim laboratorijem za okolje in hrano Novo mesto smo določili mikrobiološko kakovost vode. Končni cilj predstavlja določitev indeksa kakovosti vode (WQI). Rezultati kažejo na zelo dobro kakovost vode. Vsebnost težkih kovin je večinoma blizu ali pod mejo določljivosti, kakor tudi rezultati vsebnosti pesticidov. Dobljeni rezultati mikrobiološke analize so ustrezni. WQI je pokazal zelo visoko kakovost pitne vode.
Keywords: Pitna voda, prvi monitoring, pesticidi, mikrobiološke analize, indeks kakovosti vode
Published in DKUM: 11.07.2024; Views: 31; Downloads: 3
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Decarbonisation of Eastern European economies : monitoring, economic, social and security concerns
Mirjana Radovanović, Sanja Filipović, Simonida Vukadinović, Milovan Trbojević, Iztok Podbregar, 2022, original scientific article

Abstract: Background Decarbonisation of the European economy is one of the main strategic goals of energy transition in the European Union (EU), which aims to become a leader in this process by 2050 and to include other European countries making thus the European continent the first carbon neutral region in the world. Although decarbonisation is an important goal of the EU, the models for monitoring the progress of this process have not yet been clearly defined, and views on the social, economic, and security implications in terms of prioritising decarbonisation are conflicting. The main objective of this paper is to determine the methodological correctness of the existing method of decarbonisation monitoring, to develop a new monitoring model indicating the differences in the EU and European countries that are non-EU and to point out the underlying social, economic and security implications that must certainly find their place in the decision-making process in this field. Results The main results showed that there is no clearly defined model for monitoring the success of decarbonisation, while the indicators that are commonly used for this purpose make a model that, as the analysis shows—is methodologically incorrect. In the case of EU countries, the following indicators proved to be the most reliable: consumption-based CO2 and share in global CO2. For non-EU countries, the best monitoring indicators are CO2 per unit of GDP, consumption-based CO2, and renewable energy consumption. These indicators can explain 99% of the variance in decarbonisation success. Conclusions The basic conclusion of the paper is that even before the implementation, the decarbonisation monitoring model should be defined and methodologically tested, and the use of a single model for all EU countries or for all countries is not recommended. It is proposed to simplify the monitoring model, with an emphasis on monitoring of consumption-based CO2, which proved to be the most efficient in all sampled countries. The current method of monitoring is based exclusively on environmentally related indicators while ignoring the fact that decarbonisation is associated with almost all aspects of development. The additional social, economic and security aspects need to be developed and included in the further monitoring process.
Keywords: decarbonisation, Eastern European economies, monitoring, social implications, security aspects
Published in DKUM: 02.07.2024; Views: 79; Downloads: 2
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Tool condition monitoring using machine tool spindle current and long short-term memory neural network model analysis
Niko Turšič, Simon Klančnik, 2024, original scientific article

Abstract: In cutting processes, tool condition affects the quality of the manufactured parts. As such, an essential component to prevent unplanned downtime and to assure machining quality is having information about the state of the cutting tool. The primary function of it is to alert the operator that the tool has reached or is reaching a level of wear beyond which behaviour is unreliable. In this paper, the tool condition is being monitored by analysing the electric current on the main spindle via an artificial intelligence model utilising an LSTM neural network. In the current study, the tool is monitored while working on a cylindrical raw piece made of AA6013 aluminium alloy with a custom polycrystalline diamond tool for the purposes of monitoring the wear of these tools. Spindle current characteristics were obtained using external measuring equipment to not influence the operation of the machine included in a larger production line. As a novel approach, an artificial intelligence model based on an LSTM neural network is utilised for the analysis of the spindle current obtained during a manufacturing cycle and assessing the tool wear range in real time. The neural network was designed and trained to notice significant characteristics of the captured current signal. The conducted research serves as a proof of concept for the use of an LSTM neural network-based model as a method of monitoring the condition of cutting tools.
Keywords: tool condition monitoring, artificial intelligence, LSTM neural network
Published in DKUM: 22.04.2024; Views: 146; Downloads: 10
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Analytical gas sensing in the terahertz spectral range
Andreja Abina, Uroš Puc, Mojca Jazbinšek, Aleksander Zidanšek, 2023, original scientific article

Abstract: Exploiting the terahertz (THz) part of the electromagnetic spectrum is attracting attention in various scientific and applied disciplines worldwide. THz technology has also revealed its potential as an effective tool for gas analysis in astronomy, biomedicine and chemical analysis. Recently, it has also become important in environmental applications for monitoring hazardous and toxic gases in the atmosphere. This paper gives an overview of THz gas detection analytical methods for environmental and biomedical applications, starting with a brief introduction to THz technology and an explanation of the interaction of THz radiation with gaseous species and the atmosphere. The review focuses on several gaseous species and groups of air pollutants that have been or can be analysed by THz spectrometry. The review concludes that different but complementary THz detection methods allow unique detection, identification and quantification of gaseous and particulate air pollutants with high selectivity, specificity and sensitivity. THz detection methods also allow further technological improvements and open new application possibilities.
Keywords: terahertz spectroscopy, gas sensing, air pollution, environmental monitoring
Published in DKUM: 28.03.2024; Views: 150; Downloads: 8
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LiDAR-Based Maintenance of a Safe Distance between a Human and a Robot Arm
David Podgorelec, Suzana Uran, Andrej Nerat, Božidar Bratina, Sašo Pečnik, Marjan Dimec, Franc Žaberl, Borut Žalik, Riko Šafarič, 2023, original scientific article

Abstract: This paper focuses on a comprehensive study of penal policy in Slovenia in the last 70 years, providing an analysis of statistical data on crime, conviction, and prison populations. After a sharp political and penal repression in the first years after World War II, penal and prison policy began paving the way to a unique "welfare sanction system", grounded in ideas of prisoners' treatment. After democratic reforms in the early 1990s, the criminal legislation became harsher, but Slovenia managed to avoid the general punitive trends characterized by the era of penal state and culture of control. The authoritarian socialist regime at its final stage had supported the humanization of the penal system, and this trend continued in the first years of the democratic reforms in the 1990s, but it lost its momentum after 2000. In the following two decades, Slovenia experienced a continuous harshening of criminal law and sanctions on the one hand and an increasing prison population rate on the other. From 2014 onwards, however, there was a decrease in all segments of penal statistics. The findings of the study emphasize the exceptionalism of Slovenian penal policy, characterized by penal moderation, which is the product of the specific local historical, political, economic, and normative developments.
Keywords: LIDAR, robot, human-robot collaboration, speed and separation monitoring, intelligent control system, geometric data registration, motion prediction
Published in DKUM: 16.02.2024; Views: 353; Downloads: 18
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Primerjava porabe energije objektov z in brez energetskega upravljanja : diplomsko delo
Nemanja Bogićević, 2023, undergraduate thesis

Abstract: Diplomsko delo preučuje primerjavo porabe energije med objekti z implementiranim energetskim upravljanjem in objekti brez njega. Obravnavali smo osnovne koncepte upravljanja z energijo v stavbah, vključno s standardom ISO 50001, stopnje energetskega upravljanja ter povezane sisteme nadzora in zbiranja podatkov. Prav tako smo se osredotočili na relevantno zakonodajo s področja energetske učinkovitosti in upravljanja z energijo. V nadaljevanju smo analizirali pogoje bivalnega in delovnega ugodja prostorov, kot so temperatura, vlaga, hrup, osvetlitev, koncentracija ogljikovega dioksida in radona. Nato smo izvedli primerjalno analizo kazalnikov dveh realnih stavb. Ena sledi dobrim praksam, druga pa kaže posledice pomanjkanja ozaveščanja in zaupanja v pomen upravljanja z energijo.
Keywords: energetsko upravljanje, energetski monitoring, energetski kazalniki
Published in DKUM: 18.01.2024; Views: 232; Downloads: 22
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Primerjava ročnega in avtomatskega merjenja frekvence dihanja s pomočjo signala ekg elektrod
Alex Trojnar, 2023, master's thesis

Abstract: Uvod: Frekvenca dihanja je ključni fiziološki parameter, ki se uporablja v številnih kliničnih okoljih. Kljub njegovi diagnostični in prognostični vrednosti se še vedno pogosto meri z ročnim štetjem frekvence dihanja. V zadnjem času je velik pomen v kliničnem okolju dobila metoda, s katero popolnoma neinvazivno preko signalov elektrokardiograma oziroma njegovih elektrod spremljamo frekvence dihanja. Metode: V zaključnem delu smo uporabili kvantitativno metodologijo z metodo opazovanja. S pomočjo zbranih podatkov iz kliničnega okolja, smo naredili opazovalno študijo. Za izvedbo raziskovalne naloge smo uporabili neslučajnostni namenski vzorec, ki je zajemal 150 pacientov, starejših od 18 let, ki so bili priključeni na EKG monitoring. Rezultati: V raziskavi je sodelovalo 150 pacientov, pri čemer je analiza meritev frekvence dihanja pokazala razlike med izmerjenimi vrednostmi brez EKG monitorja (19,89 vdiha na minuto) in z EKG monitorjem (19,99 vdihov na minuto). Statistična primerjava razlik med izmerjeno frekvenco dihanja brez in z EKG monitorjem ni pokazala statistično pomembnih razlik. Razprava in sklep: Ugotavljamo, da je natančnost merjenja frekvence dihanja ključnega pomena pri kliničnem delu. Glede na rezultate študije menimo, da je spremljanje frekvence dihanja ključnega pomena pri zgodnjem odkrivanju bolezni in napredovanju zdravstvenega stanja pacientov. Zato si želimo, da bi se zdravstveni delavci lahko zanesli na aparate, ki omogočajo natančno in zanesljivo merjenje frekvence dihanja.
Keywords: dihanje, frekvenca dihanja, EKG, monitoring
Published in DKUM: 06.12.2023; Views: 360; Downloads: 32
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Towards forty years of Krško NPP operation : an overview of population exposures to radiation
Matjaž Koželj, 2021, original scientific article

Abstract: In this article, the influence of a controlled magnetic field on gadolinium plates was modelled and simulated to be used in magnetic refrigeration installations. This is a state-of-the-art technology that does not use refrigerants and does not work based on vapour compression, which is based on the operation of the magnetocaloric properties of the material used; in the case below, this material, in the form of a flat plate, has certain magnetocaloric properties and under the influence of magnetic induction can be used successfully in such innovative installations. The advantages of using gadolinium in the form of a flat plate in a magnetic regenerator and thermal energy dissipation on its surface under the controlled magnetic field's influence were studied.
Keywords: Krško NPP, NEK, radioactivity monitoring, radioactivity releases, dose assessment, population exposures, history of doses
Published in DKUM: 10.11.2023; Views: 263; Downloads: 3
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Monitoring and assessment mechanism of just energy transition trajectories : do just transition observatories matter?
Dionysios Giannakopoulos, Ioannis Karagiannis, Lefteris Topaloglou, 2022, original scientific article

Abstract: The primary aim of the European Green Deal is to move towards climate neutrality in a socially just and inclusive way. To this end, the EU has set up the so-called ‘Just Transition Mechanism’ (JTM), which will provide funding and technical assistance to the regions of the EU most affected by the transition to a green economy. However, in addition to securing sufficient resources and providing technical assistance for their utilisation, a critical factor for the successful outcome of the transition in coal-dependent regions is the establishment of effective monitoring/assessment mechanisms and place-based governance models. This reflects the departure of European politics from horizontal and one-size-fits-all policies. This is done for two reasons: (a) the utilisation of local knowledge and local territorial capital deals better with problems and (b) the transfer of the level of decision-making and implementation of policies as close as possible to the citizens to whom they concern. An effective governance model; however, should be accompanied by an effective mechanism for scientifically monitoring, analysing, evaluating, and formulating substantiated policy proposals. Setting up and operating a Just Transition Observatory could be a valuable support mechanism, provided it has the presumption of multi-level expertise and objectivity, deep knowledge of local specificities and legitimacy to institutionally represent the public interest at the local level. Such an Observatory could function as an independent evaluation body (with periodic reports or focused studies) in the course of the Energy Transition Programmes, identifying potential difficulties, recording impacts, results and outcomes, as well as providing policy recommendations. Given that Just Transition Plans include a number of important transformational policies and transformative plans, the crucial question that arises is whether regional and central policy makers have the tools to evaluate these transformational policies and transformative projects. In this regard, it is necessary to design evaluation models based on predefined indicators and criteria that will be jointly defined in the context of public consultation. This will ensure objectivity on the basis of commonly agreed indicators and objectives, while also guaranteeing the legitimacy and acceptance of both strategic policies and specific investment plans. This paper attempts to examine to what extent there is room for the establishment of ‘Just Transition Observatories’ Platforms along the coal-dependent areas. More specifically, the potential of such mechanism to monitor, analyse and evaluate clean energy transition, and provide robust policy recommendations, will be explored. To this end, Just Transition Observatories will operate as an independent evaluation mechanism producing evidence-based reports and studies on clean energy transition. Thus, the Observatories will be able to deliver periodic reports based on indicators, comparative analysis and policy recommendations. In addition to this, such mechanisms could enhance networking at the EU, national and local level, mobilising scientific dialogue and debate on clean energy transition.
Keywords: just transition, monitoring mechanisms, observatory, governance
Published in DKUM: 30.10.2023; Views: 476; Downloads: 4
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