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71.
72.
Supernovae seen through gravitational telescopes
Tanja Petrushevska, 2018, objavljeni povzetek znanstvenega prispevka na konferenci

Opis: Galaxies, and clusters of galaxies, can act as gravitational lenses and magnify the light of objects behind them. The effect enables observations of very distant supernovae, that otherwise would be too faint to be detected by existing telescopes, and allows studies of the frequency and properties of these rare phenomena when the universe was young. Under the right circumstances, multiple images of the lensed supernovae can be observed, and due to the variable nature of the objects, the difference between the arrival times of the images can be measured. Since the images have taken different paths through space before reaching us, the time-differences are sensitive to the expansion rate of the universe. One class of supernovae, Type Ia, are of particular interest to detect. Their well known brightness can be used to determine the magnification, which can be used to understand the lensing systems. I will also report our discovery of the first resolved multiply-imaged gravitationally lensed supernova Type Ia.
Ključne besede: lensed supernovae, strong lensing
Objavljeno: 03.05.2018; Ogledov: 233; Prenosov: 0
.pdf Polno besedilo (541,15 KB)

73.
Srečanja in obsedenosti v sodobnem mestu
Helene Thümmel, 2018, magistrsko delo

Opis: Magistrsko delo se osredotoča na identiteto v urbanih prostorih, združuje teoretična prizadevanja in terensko raziskovanje z intervencijami v javnem prostoru v štirih evropskih mestih (#Gradec, #Ljubljana, #Trst, #Reka). Raziskava preizprašuje o manifestacijah in izvoru identitete v javnem prostoru, v kakšnih oblikah se ta lahko pojavi in v katerih praksah se pogosto uporablja za vizualizacijo. Besedilo dela se razvija vzdolž treh področij vedenja: Prvi del pokriva splošno raziskavo (3//sessions) o izbranih elementih in strukturah sodobnega mesta. Drugi del je študij specifične prakse in poskusov identifikacije prebivalcev mesta (4//obsessions). Praktično delo (//preveč večernih zabav) sestavlja vrsta intervencij, pri čemer so pozicije (prostorsko, čustveno, politično, družbeno) #označene z betonskimi kockami velikosti 12x12x12cm. Intervencije zastavljajo vprašanja o aktualni oziroma dominantni pripovedi. Kocke so lahko postavljene kot provokacija, kot pikselacija #urbanega prostora, kot ustvarjanje #skupnega območja ali služi kot #spomenik, itd. Tretji del (5//again!) je dokumentacija praktičnega dela magistrskega zaključnega projekta. Intervencije v javnem prostoru imajo namen osvetliti probleme urbanega okolja in težave v procesu identifikacije. Zadnji del se osredotoča na avtoričin osebni pristop k projektu in izhaja predvsem iz njene umetniške prakse v javnem prostoru.
Ključne besede: urbani prostor, javni prostor, okolje, identiteta, meščan, uporabnik, situacija, umetnost, akcija, intervencija
Objavljeno: 24.04.2018; Ogledov: 271; Prenosov: 8
.pdf Polno besedilo (13,60 MB)

74.
Vertical profiling of aerosol properties with two-wavelength polarization Raman lidar over the Vipava valley
William Eichinger, Klemen Bergant, Griša Močnik, Luka Drinovec, Samo Stamoč, Asta Gregorič, Longlong Wang, 2018, objavljeni povzetek znanstvenega prispevka na konferenci

Opis: Presence of atmospheric aerosols affects the Earth’s radiation budget and thus also atmospheric thermal structure, which in turn affects cloud and planetary boundary layer (PBL) dynamics. We combine in-situ and remote measurements to determine aerosol properties in a representative hot-spot for air pollution in a complex terrain configuration. Vertical profiles of aerosol properties were investigated using a two-wavelength polarization Raman lidar system in the Vipava valley. Using lidar-obtained particle depolarization ratio, lidar ratio and backscatter Ångström exponent (355 nm / 1064 nm), which depend on aerosol shape, size and refractive index, thus the aerosols can be identified and the roles of different aerosol types in the observed atmospheric processes were investigated. In addition, aerosol absorption coefficients were measured in-situ by Aethalometers (AE33, Magee Scientific / Aerosol d.o.o.) on the valley floor and on the adjacent mountain range, 850 m above the lidar site. Our primary goal was to study the variability of aerosol types within and above the Vipava valley, which was performed using the entire lidar dataset from August – December 2017. Primary anthropogenic aerosols within the valley is mainly emitted from two sources: individual domestic heating systems, which mostly use biomass fuel and traffic. Natural aerosols, transported by long-range transport, such as mineral dust and sea salt, were observed both above the PBL and entering into the PBL. Vertical distributions of aerosol properties, in par- ticular the particle depolarization ratio, indicated atmospheric stratification with different aerosol types occupying different height ranges. In the presence of Bora (strong down-slope wind), Kelvin-Helmholtz instabilities were observed between the PBL and the free troposphere. Using aerosol type identification capability of our system, we discovered that this instability was responsible for ejecting aerosols from the PBL up to 2 km into the free troposphere. In addition, we improved the reliability of aerosol identification in vertical profiles using absorption coeffi- cient measured by Aethalometer. Combining it with the aerosol extinction coefficient at 355 nm derived from lidar data, we derived aerosol single scattering albedo (SSA), which is an important parameter for aerosol characterization.
Ključne besede: Aerosol, Vipava valley, lidar
Objavljeno: 23.04.2018; Ogledov: 277; Prenosov: 0
.pdf Polno besedilo (35,82 KB)

75.
Primjena pivskog tropa u proizvodnji bioplina
Mario Panjicko, Gregor Drago Zupančič, Marina Tišma, Bruno Zelić, 2017, samostojni znanstveni sestavek ali poglavje v monografski publikaciji

Opis: Pivarska industrija je veliki generator otpadnih tokova. Pivski trop, kao jedan od tri glavna otpada toka, po kemijskom je sastavu lignocelulozni materijal. Zbog sve većeg porasta cijena energije i povećane brige za očuvanjem okoliša, u zadnje vrijeme se provode brojna istraživanja procesa anaerobne razgradnje (anaerobne digestije) pivskog tropa u svrhu proizvodnje bioplina. Bioplin proizveden prilikom procesa anaerobne razgradnje sastoji se najvećim dijelom od metana (CH4) i ugljikovog dioksida (CO2), s malim udjelima sumporovodika (H2S) i amonijaka (NH3) te plinova koji se mogu naći u tragovima, kao što su vodik (H2), dušik (N2), ugljikov monoksid (CO), zasićeni ili halogenirani ugljikovodici te kisik (O2). Osnovni problem primjene pivskog tropa u procesu anaerobne razgradnje u svrhu proizvodnje bioplina je njegov složen kemijski sastav. Strukturna kompleksnost lignina, njegova kemijska stabilnost i netopljivost posebice otežavaju proces anaerobne razgradnje. U ovom pregledu prikazane su osnove procesa anaerobne razgradnje, vrste reaktora za provedbu procesa anaerobne razgradnje te su opisane mogućnosti primjene pivskog tropa u procesu anaerobne razgradnje.
Ključne besede: anaerobna razgradnja, bioreaktori, lignoceluloza, bioplin, pivski trop
Objavljeno: 23.04.2018; Ogledov: 265; Prenosov: 0
.pdf Polno besedilo (6,31 MB)

76.
Prevajalčev in lektorjev imaginarij pod črto založniškim standardom
Barbara Pregelj, druga izvedena dela

Ključne besede: prevajanje, lektoriranje, normiranje jezika, praksa, založništvo
Objavljeno: 20.04.2018; Ogledov: 258; Prenosov: 0
.pdf Polno besedilo (40,98 KB)

77.
78.
Spatial terms and conditions of Sign Language Agreement
Matic Pavlič, 2018, objavljeni povzetek znanstvenega prispevka na konferenci

Ključne besede: Slovenian Sign Language, agreement, referential location, transitives, ditransitives
Objavljeno: 17.04.2018; Ogledov: 383; Prenosov: 8
.pdf Polno besedilo (236,55 KB)

79.
Do bilinguals and musicians have better ears?
Artur Stepanov, predavanje na tuji univerzi

Ključne besede: bilingualism, music, perception, discrimination task, syntax
Objavljeno: 16.04.2018; Ogledov: 275; Prenosov: 0
.pdf Polno besedilo (493,93 KB)

80.
Hemichrome Determination by Thermal Lensing with Polyethylene Glycols for Signal Enhancement in Aqueous Solutions
Mikhail Proskurnin, Mingqiang Liu, Mladen Franko, Viktoriya Galimova, 2018, izvirni znanstveni članek

Opis: The thermal lens technique is proposed for the determination of total hemoglobin in the form of reversible hemichrome. The conditions were optimized (concentration of sodium dodecyl sulfate, 2 mM) to attain the maximum sensitivity with the use of polyethylene glycols as signal enhancers. For polyethylene glycols with molecular weights 1500–35000 Da in a concentration range of 5–15% w/w (5–25 mM), the influence on thermal lens signal enhancement was estimated. It is shown that the use of 5% w/w polyethylene glycol 2000 provides the maximum increase in the thermal lens enhancement factor (by 40%) in comparison with unmodified aqueous solutions. The detection limit of iron(II) tris(1,10-phenanthrolinate) as a model system is 60 nM. Under these conditions, the thermal lens detection limit of hemichrome is 10 nM, which shows a 15-fold enhancement compared to spectro- photometry. Modification of the medium with polyethylene glycols decreases the limit of detection of hemichrome determination by 15% in comparison with unmodified aqueous solutions due to better reproducibility for the range of concentrations from 0.02 to 0.9 μM.
Ključne besede: Hemoglobin, hemikrom, optotermična spektroskopija, etilenglikol, spektrometrija s toplotnimi lečami
Objavljeno: 16.04.2018; Ogledov: 277; Prenosov: 0
.pdf Polno besedilo (722,19 KB)

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