81. Performance of microAethalometers: Real-world Field Intercomparisons from Multiple Mobile Measurement Campaigns in Different Atmospheric EnvironmentsHoney Alas, Thomas Mueller, Kay Weinhold, Sascha Pfeifer, Kristina Glojek, Asta Gregorič, Griša Močnik, Luka Drinovec, Francesca Costabile, Martina Ristorini, A. Wiedensohler, 2020, izvirni znanstveni članek Opis: Small aethalometers are frequently used to measure equivalent black carbon (eBC) mass concentrations in the context of personal exposure and air pollution mapping through mobile measurements (MM). The most widely used is the microAethalometer (AE51). Its performance in the laboratory and field is well documented, however, there is not sufficient data in the context of its performance in different environments. In this investigation, we present the characterization of the performance of the AE51 through field unit-to-unit intercomparisons (IC), and against a reference absorption photometer from three MM campaigns conducted in drastically different environments. Five IC parameters were considered: i) study area, ii) location of IC, iii) time of day, iv) duration of IC, and v) correction for the filter-loading effect. We can conclude that it is crucial where and how long the IC have been performed in terms of the correlation between the mobile and reference instruments. Better correlations (R2 > 0.8, slope = 0.8) are achieved for IC performed in rural, and background areas for more than 10 minutes. In locations with more homogenous atmosphere, the correction of the loading effect improved the correlation between the mobile and reference instruments. In addition, a newer microAethalometer model (MA200) was characterized in the field under extreme cold conditions and correlated against another MA200 (R2 > 0.8, slope ≈ 1.0), AE51(R2 > 0.9, slope ≈ 0.9), and a stationary Aethalometer (AE33) across all wavelengths (R2 > 0.8, slope ≈ 0.7). For MA200, the loading effect was more pronounced, especially at the lower wavelengths, hence the correction of the loading effect is essential to improve the correlation against the AE33. The MA200 and AE51 proved to be robust and dependable portable instruments for MM applications. Real-world quality assurance of these instruments should be performed through field IC against reference instruments with longer durations in areas of slowly changing eBC concentration.
Ključne besede: Portable instruments, Mobile monitoring, Black carbon, Instrument intercomparisons
Objavljeno v RUNG: 15.09.2020; Ogledov: 2771; Prenosov: 184
 Celotno besedilo (3,54 MB) |
82. VPLIV SONČNEGA OŽIGA IN DEHIDRACIJE GROZDJA V POZNEM DOZOREVANJU NA KAKOVOST GROZDJA (Vitis vinifera L.) IN VINA SORTE 'BARBERA'Kristina Cotič, 2019, diplomsko delo Opis: Venenje ali dehidracija grozdja opisuje nepovratno in progresivno izgubo vode v grozdni jagodi, opisuje izgubo vode iz parenhimskih celic v mesu jagode. Spremembe zaradi dehidracije so opazne v velikosti, masi ter zunanjemu izgledu jagode. V diplomskem delu smo želeli preučiti vpliv dehidracije in sončnih ožigov v poznem dozorevanju na nekatere količinske in kakovostne parametre grozdja in vina sorte 'Barbera' (Vitis vinifera L.). Grozdne jagode smo ustrezno razdelili na dve skupini, na dehidrirane in nedehidrirane. Vpliv dehidracije grozdnih jagod na kemične in senzorične parametre smo preučevali z mikro-vinifikacijo v treh ponovitvah.
Rezultati našega poskusa kažejo, da dehidracija v poznem dozorevanju vpliva na količino in kakovost grozdja in vina sorte 'Barbera' (Vitis vinifera L.). Ugotovili smo, da je bil primaren vzrok izgube mase jagod dehidracija grozdnih jagod v poznem dozorevanju in ne sončni ožig. Dehidracija jagod je značilno zmanjšala maso svežih jagod, kar je posledično vplivalo na manjši pridelek. Večjo vsebnost topne suhe snovi smo določili v grozdnem soku iz dehidriranih jagod. Prav tako smo v grozdnem soku iz dehidriranih jagod izmerili višje titrabilne kisline. Stopnja alkohola je bila višja v vinih, pridelanih iz dehidriranih jagod. Vina so se razlikovala tudi po vsebnosti skupnih antocianov, ti so bili višji v vinih iz dehidriranih jagod kar sovpada z izmerjenimi podatki o višji vsebnosti skupnih polifenolov v vinu iz dehidriranih jagod. Razlike smo opazili tudi v intenziteti barve vina, katera je bila višja v vinih iz dehidriranih jagod, medtem ko je bil odtenek barve višji v vinih iz nedehidriranih jagod. Senzorična analiza pridelanih vin je pokazala, da so bila vina, pridelana iz dehidriranih jagod, ocenjena kot bolj sadna (rdeče in temno sadje) in manj zelena, čeprav razlike niso bile statistično značilne.
Dehidracija grozdnih jagod v poznem dozorevanju je vplivala na pridelek, vsebnost topne suhe snovi in skupnih kislin v grozdju ter značilno vplivala na alkohol in barvne parametre vina. Razlike v senzorični zaznavi so bile manj izrazite.
Ključne besede: dehidracija jagod, sončni ožig, Vitis vinifera L. 'Barbera', indeks dehidracije, mikro-vinifikacija, kemijski parametri vina, antociani, senzorika vina
Objavljeno v RUNG: 14.10.2019; Ogledov: 5984; Prenosov: 176
Celotno besedilo (2,29 MB) |
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87. Predstavitev Bele knjige o prevajanju 2019 : Ljubljana, Društvo slovenskih književnih prevajalcev, 23. april 2019 ob 13. uriBarbara Pregelj, Đurđa Strsoglavec, Kristina Pučnik, Andreja Skarlovnik Ziherl, Jana Zidar, Olga Shrestha, Polona Mertelj, Polona Brumen, druga izvedena dela Ključne besede: bela knjige, prevajanje, DSKP, predstavitve
Objavljeno v RUNG: 06.05.2019; Ogledov: 3037; Prenosov: 0
Gradivo ima več datotek! Več... |
88. Zakaj potrebujemo Belo knjigo o prevajanju? : Moderiranje Debatne kavarne na Knjižnem sejmu 22. 11. 2018 ob 16hBarbara Pregelj, Polona Mertelj, Kristina Pučnik, Jana Veber, Mateja Seliškar Kenda, druga izvedena dela Ključne besede: Bela knjiga, prevajanje, Slovenija, kulturno polje, pomen prevajanja, prevajalska društva
Objavljeno v RUNG: 17.12.2018; Ogledov: 3251; Prenosov: 0
Gradivo ima več datotek! Več... |
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90. Čuvari (Keepers)Peter Purg, 2017, umetniška poustvaritev Opis: The pavement reconstructions in the Belgrade University of the Arts area at Kosančičev venac had been going on for months, and heaps of cobblestone. Sand just kept being moved from one side of the rubble-filled street to the other. Suddenly one afternoon, on the 30th of March 2017, a little bed of dry (stonewall) plants appeared on the top of the biggest sand heap. They remained there for a whole month, somebody must have been caring for them... Soon after they suddenly disappeared, another big bright flower took their place immediately -- but on the very same day (April 28th), that flower disappeared, too.
The documentary photos were taken (in the order of gallery appearance) every couple of days throughout April 2017 -- special thanks to (photo by) Rastko Čirić and Danica Bojić
Ključne besede: analog, belgrade, Beograd, drywall, installation, intervention, plants, site-specific
Objavljeno v RUNG: 13.06.2017; Ogledov: 4298; Prenosov: 0 |
