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11.
Kaj pa bo vas pozimi grelo?
Henrik Gjerkeš, 2019, interview

Keywords: Ogrevanje, energenti, kakovost bivalnega okolja
Published: 03.12.2020; Views: 16; Downloads: 0
.pdf Fulltext (7,05 MB)

12.
Renewables in buildings and local communities
Henrik Gjerkeš, invited lecture at foreign university

Keywords: Renewable energy sources, sustainable development, buildings, local communities
Published: 03.12.2020; Views: 18; Downloads: 0
.pdf Fulltext (2,50 MB)

13.
Household and road dust as indicators of airborne particulate matter elemental composition
Klemen Teran, 2020, doctoral dissertation

Abstract: Household dust (HD) and road dust (RD) are widespread and easily accessible urban sediments, which are influenced by deposition of airborne particulate matter (PM). Since airborne PM is considered to be one of the most important pollutants in urban areas, with significant adverse effects on human health, a better understanding of its elemental composition and dispersion mechanisms is needed. The present study examines whether the HD and RD elemental composition can be used as a quick alternative method for the determination of corresponding PM elemental composition over a selected area. In summer 2016, HD, RD, and topsoil samples were collected from 249 sampling locations distributed across rural, urban, and industrial areas in Slovenia. The collected samples were sieved for particle diameters below 63 μm and analysed for 53 elements with ICP-MS after aqua regia digestion. SEM/EDS analyses were applied for the determination of characteristic particles at the microlevel. Finally, the elemental composition of HD and RD was compared with the PM10 elemental composition obtained from National Network for Ambient Air Quality Monitoring governed by Slovenian Environmental Agency (ARSO) to determine any potential connection between them. The results show that HD and RD are considerably enriched with a large set of elements compared to the topsoil. Correlations and factor analyses show that spatial distribution of factor scores in RD revealed strong regional trends, connected with soil resuspension (Al, Ce, Ga, K, La, Li, P, Rb, Sc and Y) or with anthropogenic sources such as traffic (Ag, Bi, Cu, Sb and Sn), steel mill emissions (Cr, Mo, Mn, Ni and W) and construction material decomposition (Ca and Sr). In contrast, HD elemental composition was highly variable between sampling locations. Variability was probably caused by indoor sources, such as smoking (Ce and La), biomass combustion (K, P and Rb), construction material decomposition (Ca and Sr) and residents’ professional occupation: dental care employees (Ag, Au, Pd) and employees in the metal-processing industry (Cr, Mo, Ni). Among deposited particles in RD, urbanization processes, such as fossil fuel combustion and traffic emissions, including brake pad abrasion and tyre wear, contributed the largest share of particles with anomalous elemental composition. Brake pad abrasion, for instance, contributed Ba-, Cu-, Sn-, and Zn-enriched irregular, angular and tabular particles, while tyre wear produced elongated rubber particles with traces of Ba, Cu, and Zn. RD from urban areas showed significantly higher elemental levels of Ag, Bi, Ca, Cd, Cr, Cu, Hg, Fe, Mo, Nb, Pb, Pt, Sb, Sn, Sr, Ti, Zn, and W in comparison to the rural environment, indicating the strong impact of urbanization on RD elemental composition. Another important anthropogenic source of deposited particles in RD were steel mills. Strong anomalies of Cr, Mo and Ni were detected in their vicinity. Their elemental levels decreased with distancing from the plan location, reaching urban background levels between 15 and 20 km from the mills. SEM/EDS analyses identified enrichments of Cr, Mn, Mo, Ni, V, and W in spherical particles and particles with partially melted surfaces, which were found only in the proximity of steel mills, indicating their influence of the PM deposition. Comparison of RD and the corresponding PM10 elemental composition showed that the RD fraction with particle diameters below 63 μm reflects PM10 elemental composition for the last 30 to 90 days for Cr, Cu, Mo and Zn and can be used as a predictor for PM10 elemental levels. This is not true for HD, as indoor particle sources prevail over the deposition of ambient PM10.
Keywords: household dust, road dust, particulate matter, PM10, pollution, Slovenia, steel mills, topsoil, traffic, urbanization
Published: 02.12.2020; Views: 14; Downloads: 5
.pdf Fulltext (16,34 MB)

14.
Toplotne črpalke v kontekstu trajnostnega ogrevanja v Sloveniji
Henrik Gjerkeš, unpublished conference contribution

Abstract: Toplotne črpalke in lesna biomasa ter odpadki, slednja prvenstveno kot kogeneracijski vir sistemov daljinskega ogrevanja, pri današnji stopnji razvoja tehnologije in klimatskih danosti v Sloveniji nedvoumno predstavljajo najbolj okolju prijazen, ekonomsko učinkovit in družbeno-socialno sprejemljiv način za oskrbo stavb s trajnostno energijo. Toplotne črpalke uporabljajo od 80 do preko 90 % obnovljivih virov energije pri svojem delovanju in pri gradnji/prenovi stavb presegajo sicer stroge zakonodajne zahteve v obliki meril za skoraj nič-energijske stavbe (sNES).
Keywords: Toplotne črpalke, obnovljivi viri energije, integracija, trajnostni razvoj
Published: 01.12.2020; Views: 18; Downloads: 0
.pdf Fulltext (3,83 MB)

15.
Toplotne črpalke v kontekstu trajnostnega ogrevanja v Sloveniji
Henrik Gjerkeš, 2019, independent professional component part or a chapter in a monograph

Abstract: Toplotne črpalke in lesna biomasa ter odpadki, slednja prvenstveno kot kogeneracijski vir sistemov daljinskega ogrevanja, pri današnji stopnji razvoja tehnologije in klimatskih danosti v Sloveniji nedvoumno predstavljajo najbolj okolju prijazen, ekonomsko učinkovit in družbeno-socialno sprejemljiv način za oskrbo stavb s trajnostno energijo. Toplotne črpalke uporabljajo od 80 do preko 90 % obnovljivih virov energije pri svojem delovanju in pri gradnji/prenovi stavb presegajo sicer stroge zakonodajne zahteve v obliki meril za skoraj nič-energijske stavbe (sNES). Moderne inverterske toplotne črpalke ne potrebujejo ne zalogovnikov toplote, ne kakršnegakoli drugega podpornega sistema (t.i. bivalentnih sistemov), ampak so kot samostojni ogrevalno/hladilni sistem (ob seveda preudarnem projektiranju) primerne za vse stavbe. Trend razvoja na področju oskrbe s trajnostno energijo gre v smer integracije različnih sistemov, s čemer je mogoče kompenzirati nestalnost posameznih obnovljivih virov energije. Vključno z novimi možnostmi, ki jih takšna integracija omogoča na področju akumulacije energije, dobivajo toplotne črpalke vedno pomembnejšo vlogo tudi v sistemih daljinskega ogrevanja v kontekstu dviga stopnje lokalne energetske samooskrbe in zmanjševanju odvisnosti od tujih energetskih virov.
Keywords: Toplotne črpalke, trajnostna energija, obnovljivi viri energije
Published: 01.12.2020; Views: 21; Downloads: 0
.pdf Fulltext (700,24 KB)

16.
Koncept krožnega gospodarstva, gradbeništvo in primer občine Kočevje
Henrik Gjerkeš, 2020, independent professional component part or a chapter in a monograph

Abstract: Krožno gospodarstvo (v nadaljevanju KG) je v zadnjih letih izpostavljeni izvedbeni koncept za prehod v trajnostno družbo, ki ga promovira evropska politika, veliko nacionalnih oblasti, agencij in nevladnih organizacij, ter celo mnoga podjetja po vsem svetu. Hitrejšo implementacijo KG zavira površna, nesistematična in velikokrat pristranska razlaga koncepta, ki se zdi kot zbirka nejasnih in nepovezanih idej s številnih raziskovalnih področij. V prispevku bodo osvetljene ključne lastnosti in razlike med trajnostjo, trajnostnim razvojem in industrijsko ekologijo kot najpogosteje uporabljeni približek za KG. Po pregledu KG, kot ga razume aktualna evropska politika, bo podan predlog celovitega koncepta KG z uravnoteženo tridimenzionalnostjo in opisana uspešna implementacija v občini Kočevje z implikacijami na sektor gradbeništva.
Keywords: Krožno gospodarstvo, trajnostni razvoj, Kočevje, koncept, življenjski cikel stavbe
Published: 01.12.2020; Views: 19; Downloads: 0
.pdf Fulltext (1,65 MB)

17.
18.
Strongly Lensed Supernovae in Well-Studied Galaxy Clusters with the Vera C. Rubin Observatory
Tanja Petrushevska, 2020, original scientific article

Abstract: Strong lensing by galaxy clusters can be used to significantly expand the survey reach, thus allowing observation of magnified high-redshift supernovae that otherwise would remain undetected. Strong lensing can also provide multiple images of the galaxies that lie behind the clusters. Detection of strongly lensed Type Ia supernovae (SNe Ia) is especially useful because of their standardizable brightness, as they can be used to improve either cluster lensing models or independent measurements of cosmological parameters. The cosmological parameter, the Hubble constant, is of particular interest given the discrepancy regarding its value from measurements with different approaches. Here, we explore the feasibility of the Vera C. Rubin Observatory Legacy Survey of Space and Time (LSST) of detecting strongly lensed SNe in the field of five galaxy clusters (Abell 1689 and Hubble Frontier Fields clusters) that have well-studied lensing models. Considering the 88 systems composed of 268 individual multiple images in the five cluster fields, we find that the LSST will be sensitive to SNe Ia (SNe IIP) exploding in 41 (23) galaxy images. The range of redshift of these galaxies is between 1.01 < z < 3.05. During its 10 years of operation, LSST is expected to detect 0.2 ± 0.1 SN Ia and 0.9 ± 0.3 core collapse SNe. However, as LSST will observe many more massive galaxy clusters, it is likely that the expectations are higher. We stress the importance of having an additional observing program for photometric and spectroscopic follow-up of the strongly lensed SNe detected by LSST.
Keywords: supernovae, strong gravitational lensing, galaxy clusters
Published: 28.11.2020; Views: 33; Downloads: 1
.pdf Fulltext (863,97 KB)

19.
20.
The interplay of grammatical number and the numeral system in early language acquisition
Franc Marušič, Rok Žaucer, invited lecture at foreign university

Keywords: Slovenščina, dvojina, usvajanje pomena števil
Published: 27.11.2020; Views: 37; Downloads: 0
.pdf Fulltext (245,95 KB)

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