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Uporaba programa energy manager pro v laboratorijskem sistemu za upravljanje z energijo
Rok Pušnik, 2020, magistrsko delo

Opis: V magistrskem delu je opisan laboratorijski eksperimentalni sistem, ki se uporablja za razvoj naprednega algoritma za upravljanje z energijo. Pojasnjeno je delovanje programa Energy Manager PRO z namenom ovrednotenja njegove ustreznosti za vključitev v laboratorijski eksperimentalni sistem, kjer bo uporabljen kot pomožno orodje pri razvoju samostojne odločitvene logike sistema za upravljanje z energijo zunaj omenjenega programa. Zaključno delo je mogoče uporabiti tudi kot pomoč pri začetku uporabe programa Energy Manager PRO, čemur so prilagojeni tudi opisi. Predstavljeno je delovanje programa po njegovi vključitvi v laboratorijski eksperimentalni sistem, kar predstavlja realen primer uporabe. Na koncu so dodani nasveti, koristni za ustrezno namestitev in delovanje programa.
Ključne besede: Energy Manager PRO, sistem za upravljanje z energijo, obdelava podatkov
Objavljeno: 28.01.2021; Ogledov: 122; Prenosov: 26
.pdf Celotno besedilo (4,89 MB)

Ensemble Docking Coupled to Linear Interaction Energy Calculations for Identification of Coronavirus Main Protease (3CLpro) Non-Covalent Small-Molecule Inhibitors
Marko Jukič, Dušanka Janežič, Urban Bren, 2020, izvirni znanstveni članek

Opis: SARS-CoV-2, or severe acute respiratory syndrome coronavirus 2, represents a new strain of Coronaviridae. In the closing 2019 to early 2020 months, the virus caused a global pandemic of COVID-19 disease. We performed a virtual screening study in order to identify potential inhibitors of the SARS-CoV-2 main viral protease (3CLpro or Mpro). For this purpose, we developed a novel approach using ensemble docking high-throughput virtual screening directly coupled with subsequent Linear Interaction Energy (LIE) calculations to maximize the conformational space sampling and to assess the binding affinity of identified inhibitors. A large database of small commercial compounds was prepared, and top-scoring hits were identified with two compounds singled out, namely 1-[(R)-2-(1,3-benzimidazol-2-yl)-1-pyrrolidinyl]-2-(4-methyl-1,4-diazepan-1-yl)-1-ethanone and [({(S)-1-[(1H-indol-2-yl)methyl]-3-pyrrolidinyl}methyl)amino](5-methyl-2H-pyrazol-3-yl)formaldehyde. Moreover, we obtained a favorable binding free energy of the identified compounds, and using contact analysis we confirmed their stable binding modes in the 3CLpro active site. These compounds will facilitate further 3CLpro inhibitor design.
Ključne besede: COVID-19, SARS-CoV-2, Mpro, 3CLpro, 3C-like protease, virtual screening, inhibitors, in silico drug design, free-energy calculations
Objavljeno: 10.12.2020; Ogledov: 236; Prenosov: 49
.pdf Celotno besedilo (2,99 MB)

Analytical modelling of achieving energy efficiency with green walls
Dejan Tasić, 2019, magistrsko delo

Opis: In the last years, energy efficiency has become an important issue for the EU and Slovenia, who both strive for more sustainable use of energy in buildings. As an innovative approach to such matter, green walls are vertical structures that can serve both as a façade or an insulation layer as well as an aesthetic design for building application. This thesis contains calculated annual heat (transmission) losses through different wall assemblies with and without a constructed green wall in front of them. The goal is to compare values of heat losses between those wall assemblies and the explanation of such results which will determine if green walls present a viable energy-efficient structure for buildings.
Ključne besede: energy efficiency, green wall, heat losses, modelling
Objavljeno: 18.11.2019; Ogledov: 707; Prenosov: 66
.pdf Celotno besedilo (3,83 MB)

The development of ARM-based portable and adaptable power supply
Tomislav Brlek, 2019, magistrsko delo

Opis: This master’s thesis describes a development of a portable and adjustable power supply. The first part of the thesis introduces us to the working principle of power supplies in general. Next, we present a functional design of a portable and adjustable power supply and a list of its required functionalities. Chapter “switched-mode power supplies” introduces us to the theoretical basics of the said power supplies, while chapter “linear regulators” introduces us to different types of linear regulators and tells us more about how they work. Everything regarding which microcontroller was used and why it was used is described in the “ARM microcontroller” chapter. Besides microcontrollers, it also talks about which integrated development environment is used and how the microcontroller is programmed. A full and detailed description of each part of the analog circuitry can be found in the chapter “describing the development of the portable and adjustable power supply”. Lastly, the user interface is described in detail.
Ključne besede: portable power supply, ARM processor, variable laboratory bench power supply, LCD touchscreen, energy efficient, lithium battery, battery charger, voltage control
Objavljeno: 13.11.2019; Ogledov: 368; Prenosov: 64
.pdf Celotno besedilo (3,85 MB)

Agronomski in okoljski vidiki prekrivnih posevkov v ekološki pridelavi zelenjadnic
Martina Robačer, 2019, doktorsko delo/naloga

Opis: Cover crops can reduce the use of external inputs such as pesticides and fertilisers and can at the same time suppress weeds as well as improve or maintain soil fertility. Cover crops can also modify the microclimate which affects pest populations and diseases. Determining cover crop species and management practices is based on the needs and goals of production. The effects of introducing living mulch (LM) and management strategies on cash crop yield, product quality and energy use were studied in certain European countries (Slovenia, Italy, Germany and Denmark) in different climatic and soil conditions. In Slovenia, in organic production of cauliflower and leek, the effects of two terms of sowing white clover with additive design were compared with a production with black foil and with the usual agricultural practice by hoeing. In the field experiments the effect of LM on arthropod dynamics and activity density was investigated. The results demonstrated that the LM systems with a substitutive design, can be effectively implemented in vegetable production if the value of the ecological services (positive externalities) delivered by LM can counterbalance the yield loss due to the cash crop density reduction. If an additive design is used, the LM should be sown several weeks after the cash crop planting. Different cash crop genotypes (i.e., open pollinated/local cultivars in comparison with the hybrids) performed similarly. Use of human labor (HL) and fossil fuel (FF) energy slightly increased in LM systems (7%). The farmers’ acceptance of the LM techniques was quite high (75% of the interviewed sample). The LM technique did not affect the infestation of cabbage caterpillar Pieris spp., showing no detrimental effect of this technique on this key pest of cabbage. In Denmark, aphid populations were higher in the sole crop system than in the LM system. In Italy, a level of larval parasitization was detected and in the first year the percentage of parasitization was higher in LM (88%) than in sole crop (63%). Overall, the LM positively affected the activity density of Carabid beetles, also increasing the diversity and evenness of species (Slovenia and Italy) or activity density of some taxa (Slovenia and Denmark). Due to numerous agroecological services of cover crops, growing simultaneously with vegetables as LM, this could be promising technique for organic and others production systems in the future.
Ključne besede: organic vegetable production, cover crops, agroecological service, living mulch, energy consumption, biodiversity, soil arthropod
Objavljeno: 01.02.2019; Ogledov: 937; Prenosov: 126
.pdf Celotno besedilo (1,43 MB)

Design of geometry and numerical simulation of the operating characteristic of the rotor of the wind turbine
aljaž Janič, 2018, diplomsko delo

Opis: The diploma thesis consists of design and numerical simulation of the wind turbine. Geometries are designed according to two theories, the Betz theory and the Schmitz theory. I used Solidworks for 3D modeling of the both rotors. Using Ansys software package, we performed numerical simulations of a rigid body for two different wind speed regimes. We were interested in the angular velocity of the spinning blades, which in combination with moment give us power.
Ključne besede: Renewable energy, wind energy, numerical simulation, wind turbine, blade design, Betz and Schmitz theory
Objavljeno: 09.08.2018; Ogledov: 671; Prenosov: 145
.pdf Celotno besedilo (2,19 MB)

The response of saturated soils to a dynamic load
Stanislav Lenart, 2008, izvirni znanstveni članek

Opis: This paper presents the two most significant types of deformation behavior fordynamically loaded, saturated soil. Flow liquefaction and cyclic mobility deserve special attention because of the large deformations that accompany these two phenomena. The submergence of a railway-line embankment due to the newly built Sava-river accumulation reservoir in Boštanj and the large landslide that occurred in the Stože area in the Julian Alps are case histories in Slovenia where flow liquefaction and cyclic mobility were analyzed. The dynamic loading caused by railway traffic and possible seismic activity were taken into account. Material from these two sites, silty sand and lacustrine carbonate silt, were used in extensive laboratory research, with the objective to define a procedure for excess pore-water pressure-generation modeling in dynamically loaded saturated soil. It has been found recently that the change of the pore-water pressure is related to the dissipated energy density calculated from the hysteresis loops caused by dynamic loading. Based on the experimental results an empirical equation defining the generation of pore pressure during dynamic loading has been proposed. The equation is divided into two parts: the first part describing the residual pore-water pressure generation, and the second part describing the increment and decrement of pore-water pressure within the load cycle, the so-called temporary pore-water pressure change. The proper effective stresses and thus the stress path of the dynamically loaded soil can be defined by using the proposed energy-based numerical model. The proposed pore-pressure model can also be used in deformation-behavior modeling. It was observed from the experimental results that after a few cycles of dynamic loading the saturated soil starts to exhibit a very low stiffness at the beginning of a load cycle, after which it begins to strengthen. The strain developed during this softening phase represents the main share of the total strain. The occurrence and duration of this phase are related to the energy dissipated during the cyclic loading as well, and the relation between the dissipated energy, the excess pore pressure and the short-term flow during cyclic mobility, give us an opportunity for a simple response modeling of the dynamically loaded saturated soils.
Ključne besede: flow liquefaction, cyclic mobility, excess pore pressure, dissipated energy
Objavljeno: 05.06.2018; Ogledov: 393; Prenosov: 90
.pdf Celotno besedilo (370,70 KB)
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Ground-sourced energy wells for heating and cooling of buildings
Heinz Brandl, Dietmar Adam, Roman Markiewicz, 2006, izvirni znanstveni članek

Opis: Energy wells are thermo-active elements for an economical extraction or storage of ground energy, similar to energy piles and other deep foundation elements also used as heat exchangers. Heating and/or cooling of buildings requires a primary and secondary thermo-active circuit, commonly connected by a heat pump. The paper gives several design aspects of energy wells which can be also used for the design of deep energy foundations. Thermal response tests have proved suitable for the in-situ determination of thermal ground properties required for an optimised design. Moreover, different systems of energy wells are discussed, and a comprehensive pilot research project is described.
Ključne besede: energy wells, energy foundations, geothermal geotechnics, geothermal heating/cooling, thermo-active structures, thermal ground properties, field testing
Objavljeno: 17.05.2018; Ogledov: 326; Prenosov: 84
.pdf Celotno besedilo (4,24 MB)
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Material and energy balance in the planning of production costs
Manuela Ingaldi, Dorota Klimecka-Tatar, 2016, samostojni znanstveni sestavek ali poglavje v monografski publikaciji

Ključne besede: material, energy, manufacturing system model, production costs, planning
Objavljeno: 11.05.2018; Ogledov: 671; Prenosov: 66
.pdf Celotno besedilo (1,03 MB)
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Climate change and ecological scarcity as an urgent reason to think about the environmental policy
Edeltraud Günther, Daria Meyr, 2016, samostojni znanstveni sestavek ali poglavje v monografski publikaciji

Ključne besede: climate change, environmental policy, transport, logistics, clean energy, renewable energy
Objavljeno: 10.05.2018; Ogledov: 448; Prenosov: 50
.pdf Celotno besedilo (1,18 MB)
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