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1.
Effective microorganisms technology applied to sewage sludge and tested in short exposure on Lepidium sativum
Tanja Buh, Leja Goljat, Darian Rampih, Petra Makorič, Sara Pignattelli, 2024, izvirni znanstveni članek

Opis: Sewage sludge has fertilizer properties and can supply a large amount of necessary nutrients to the crops, because it is full of organic matter, carbon, nitrogen and other nutrients, but on the other hand, it also contains a lot of toxic compounds, derived from its origin, such as heavy metals, antibiotics and microplastics. Effective microorganisms are a collection of naturally occurring beneficial microorganisms that are able to coexist and are commonly used in agriculture and gardening to improve plant performance and production. In this study, increasing concentrations of sewage sludge alone and added with effective microorganisms were evaluated in a short exposure on Lepidium sativum L. Parameters that were evaluated are: (i) percentage inhibition of germination, (ii) root length, (iii) biomass, (iv) soil pH, (v) total organic carbon and nitrogen both at soil and at root level. Results carried out from our experiment highlighted that effective microorganisms when coupled with sludge are able to restore biometric parameters by resetting seeds germinability inhibition and improving root elongation more than 50% when compared with plants added only with sludge, restoring the values almost of those to the control plants, as well as for soil pH values. Total organic carbon and total nitrogen are boosted at soil level almost at 50% when compared with the same concentrations added only with sludge, while at root level they appear decreased only in plants directly added with sludge treated with effective microorganisms
Ključne besede: sewage sludge, effective microorganism, total organic carbon, total nitrogen, germinability, short plants exposure, acute toxicity, biomass, pH
Objavljeno v RUNG: 12.04.2024; Ogledov: 132; Prenosov: 0
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2.
Hevreka (Supernove tipa 1a)
Tanja Petrushevska, Japelj Jure, radijska ali televizijska oddaja, podkast, intervju, novinarska konferenca

Opis: V vesolju tudi poka kot za stavo. Zvezde, ki večino življenja ne počnejo nič drugega kot spreminjajo vodik v helij, si včasih zaželijo pozornosti in eksplodirajo kot supernove. Zvezda kar naenkrat postana svetlejša od celotne galaksije, zato supernove vidimo tudi, ko eksplodirajo daleč, daleč stran. Astronomi vesoljski ognjemet seveda z veseljem opazujejo. Supernove namreč niso zgolj izjemno svetle, ampak igrajo pomembno vlogo pri številnih procesih v vesolju. Kozmične eksplozije so različnih tipov in okusov, verjetno najbolj slavne med njimi pa so supernove tipa 1a. Te nam je približala doktorica Tanja Petrushevska, docentka na Fakulteti za naravoslovje Univerze v Novi Gorici. Pred mikrofon jo je povabil dr. Jure Japelj.
Ključne besede: radio, intervju, supernova
Objavljeno v RUNG: 24.11.2023; Ogledov: 444; Prenosov: 1
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STRENGTHENING ENERGY AND CLIMATE LITERACY WITH MICROLEARNING AND OPEN EDUCATIONAL RESOURCES
Mojca Drevenšek, 2023, magistrsko delo

Opis: This master’s thesis is motivated by the desire to actively engage Slovenian youth in co-creating our energy and climate future. The background is the growing interest in effective energy transition at the national, EU and global levels, and we specifically focus on the role of education in achieving this goal. The main problem we address is the need for improvement of energy- and climate-related non-formal youth education to increase their interest in the topic, and motivate their engagement in public discussions and the policy-making processes. To tackle this problem, we use the existing En-ROADS energy and climate interactive simulation tool and the accompanying online training series and complement it with new learning materials and learning activities, developed in our educational project. Our approach focuses on open education practices and the co-creation of open educational resources (OER), supported by microlearning via social media (Instagram). We develop a novel approach to address the problem by involving youth in a non-formal open educational process where they are invited to co-create the content and format of learning materials, decide on the technologies used, and affect the implementational process of the key learning activities. The main contributions of the thesis are the developed OERs, which can be adapted, reused or remixed by other stakeholders in the field of energy and climate education, and the recommendations for educators both in the field of energy and climate topics as well as in other fields, related to education for sustainable development. The main methodological finding of the thesis focuses on the importance of flexibility and adaptation of learning materials and activities according to the expressed interests and expectations of young learners. Their feedback needs to be carefully gathered and integrated into the implementation of the project.
Ključne besede: energy literacy, climate literacy, open education, OER (open educational resources), microlearning, online learning, systems thinking
Objavljeno v RUNG: 03.10.2023; Ogledov: 980; Prenosov: 17
.pdf Celotno besedilo (3,38 MB)

6.
Mikroplastika v kraških ekosistemih in njen vpliv na kakovost pitne vode
Lara Valentić, 2023, doktorska disertacija

Opis: Namen doktorske disertacije je bil opredeliti mikroplastiko (MP) ter izboljšati razumevanje o onesnaženju z MP v kraških ekosistemih in njenem vplivu na kakovost pitne vode, saj je to področje raziskav še v povojih. Obenem je bil namen doktorske disertacije določiti vire onesnaženja z MP in določiti transportne poti onesnaženja v kraških ekosistemih, da bi se preprečilo ali zmanjšalo onesnaževanje okolja, saj so kraški vodonosniki v sušnih območjih pogosto edini in najpomembnejši viri pitne vode za lokalno prebivalstvo. Izbrane so bile različne lokacije vzorčenja, s čimer smo zagotovili širok pregled nad različnimi ekosistemi (zrak, voda, deževnica in sediment). Izbrana sta bila dva od najpomembnejših kraških izvirov (Malni in Rižana, ki skupaj zagotavljata pitno vodo za celotno obalo z zaledjem in za več kot 20.000 lokalnih prebivalcev v občinah Postojna in Pivka). Nadalje so bila izbrana tri vzorčna mesta v Alpah kot referenčne točke z najbolj neokrnjenim okoljem v Sloveniji (Bohinjsko jezero, Blejsko jezero in ob Domu na Komni) ter v Lescah kot referenčni točki najbolj onesnažene lokacije, ki je hkrati tudi najbližje proučevanemu kraškemu ekosistemu. V okviru doktorske naloge so bile uporabljene različne metode vzorčenja, saj smo poskušali določiti protokol, ki je najboljši za posamezno kraško okolje. Tako so bili izviri in jezera vzorčeni z vzorčevalno mrežo, sedimenti so bili vzorčeni z uporabo sedimentnega stratigrafskega vzorčevalnika Uwitec, vzorčenje zraka je bilo izvedeno z uporabo sekvenčnega vzorčevalnika prahu Giano PMx, deževnica pa je bila vzorčena z 20-litrsko steklenico in lijem iz nerjavnega jekla. Vsi vzorci so bili filtrirani s steklenimi filtri, pregledani pod stereomikroskopom za določitev potencialnih MP-delcev in analizirani z mikroskopom Lumos II FTIR-ATR za določitev plastičnih polimerov. Kasneje smo uporabo posamezne metode vzorčenja in analize kritično ocenili. Pri vzorcih, ki so bili vzeti na izviru Malni, so rezultati pokazali, da je najvišja koncentracija MP v prvem vodnem pulzu po daljšem sušnem obdobju, medtem ko za Rižano iz dobljenih rezultatov ne moremo razbrati trendov transporta MP. Pri vzorcih deževnice in zraka je bilo pričakovano, da bodo imeli vzorci iz Lesc najvišje koncentracije MP-delcev zaradi bližine glavnih prometnih povezav: avtoceste proti Salzburgu (Avstrija) in Nemčiji, glavne železniške povezave in manjšega športnega letališča. Izkazalo se je, da so bile najvišje vrednosti MP v vzorcih deževnice na Komni, medtem ko so vsi vzorci zraka imeli zelo majhne količine MP-delcev. Vzorci sedimenta so bili odvzeti samo v Bohinjskem in Blejskem jezeru in niso vsebovali večjih količin MP-delcev, kar bi lahko bil vpliv hitrega transporta MP-delcev z vodnimi tokovi, zaradi česar delci nimajo časa za posedanje. Prav tako se celotna masa vode v obeh jezerih razmeroma hitro zamenja – v Bohinjskem jezeru se celotni volumen vode zamenja trikrat na leto, medtem ko se v Blejskem jezeru volumen vode zamenja vsako leto in pol. V splošnem je bilo mogoče sklepati na dva vira onesnaženja z MP: plastični čolni in kajaki lokalnih prebivalcev in turistov na obeh jezerih ter oblačila pomembno prispevajo k onesnaženju. To smo določili na podlagi najdenih plastičnih polimerov (v obeh jezerih) in na podlagi oblike delcev (največkrat smo našli različno debela vlakna in nitke). V vzorcih smo sicer našli veliko delcev, vendar je bila le majhna količina identificirana kot vir plastike, kar je tudi ena od ugank v tej raziskavi. Pripravili smo tudi konceptualni model za boljše razumevanje transportnih poti MP v kraškem okolju. V modelu smo združili rezultate iz doktorske disertacije in raziskave Valentić (2018). Še vedno je veliko neznank, vendar lahko z gotovostjo trdimo, da so viri onesnaženja zelo pomembni. Najvišje koncentracije MP so bile najdene v vodi iz ponvic turističnih jam in v deževnici na Komni. Koncentracije so visoke tudi v vzorcih sedimenta iz turističnih delov jam in iz alpskih jezer.
Ključne besede: mikroplastika (MP), Slovenija, alpski kras, dinarski kras, kraški vodonosnik, alpska jezera, izviri, deževnica, zrak, sedimenti, konceptualni model
Objavljeno v RUNG: 14.09.2023; Ogledov: 812; Prenosov: 30
.pdf Celotno besedilo (7,71 MB)

7.
What can we do with strongly lensed supernovae?
Tanja Petrushevska, 2023, objavljeni povzetek znanstvenega prispevka na konferenci

Ključne besede: cosmology, strong lensing, supernovae
Objavljeno v RUNG: 07.09.2023; Ogledov: 629; Prenosov: 3
.pdf Celotno besedilo (18,56 MB)

8.
Contributed talk at the international conference "Cosmology in Miramare" 2023
Tanja Petrushevska, 2023, objavljeni povzetek znanstvenega prispevka na konferenci

Opis: The searches and observations of supernovae (SNe) have been motivated by the fact that they are exceptionally useful for various astrophysical and cosmological applications. Most prominently, Type Ia SNe (SNe Ia) have been used as distance indicators showing that the expansion rate of the Universe is accelerating. The strong gravitational lensing effect provides another powerful tool and occurs when a foreground mass distribution is located along the line of sight to a background source. It can happen so that galaxies and galaxy clusters can act as “gravitational telescopes”, boosting the faint signals from distant SNe and galaxies. Thanks to the magnification boost provided by the gravitational telescope, we are able to probe galaxies and SNe that otherwise would be undetectable. Therefore, the combination of the two tools, SNe and strong lensing, in the single phenomenon of strongly lensed SNe, provides a powerful simultaneous probe of several cosmological and astrophysical phenomena. By measuring the time delays of strongly lensed supernovae and having a high-quality strong lensing model of the galaxy cluster, it is possible to measure the Hubble constant with competitive precision. In this talk, I will present some of the past and recent results that have been possible due to the observations of strongly lensed supernovae and anticipate what we can expect in the future from the upcoming telescope surveys, such as the Vera C. Rubin Observatory and Nancy G. Roman Space Telescope.
Ključne besede: cosmology, supernovae, strong lensing
Objavljeno v RUNG: 07.09.2023; Ogledov: 667; Prenosov: 2
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9.
Strong lensing as a tool to study the early universe : written report
Brankica Apostolova, 2023, raz. nal. na višji ali visoki šoli

Ključne besede: strong lensing, astrophysics, Roman Space Telescope, galaxy clustersv, galaxies
Objavljeno v RUNG: 23.08.2023; Ogledov: 626; Prenosov: 0
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10.
The rise and fall of the nuclear transient PS16dtm
Tanja Petrushevska, 2023, objavljeni povzetek znanstvenega prispevka na konferenci (vabljeno predavanje)

Opis: Thanks to the advent of large-scale optical surveys, a diverse set of flares from the nuclear regions of galaxies has recently been discovered. These include the disruption of stars by supermassive black holes at the centres of galaxies - nuclear transients known as tidal disruption events (TDEs). Active galactic nuclei (AGN) can show extreme changes in the brightness and emission line intensities, often referred to as changing-look AGN (CLAGN). Given the physical and observational similarities, the interpretation and distinction of nuclear transients as CLAGN or TDEs remains difficult. One of the obstacles of making progress in the field is the lack of well-sampled data of long-lived nuclear outbursts in AGN. I will present PS16dtm, a nuclear transient in a Narrow Line Seyfert 1 (NLSy1) galaxy which has been proposed to be a TDE candidate. I will show our multi-year spectroscopic and photometric study of PS16dtm, which can help us to better understand the outbursts originating in NLSy1 galaxies.
Ključne besede: active galactic nuclei, tidal disruption events
Objavljeno v RUNG: 10.08.2023; Ogledov: 740; Prenosov: 3
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