71. How to react to the necessity of a sustainable animal production? The EcoLamb projectTanja Peric, Martina Bergant Marušič, Ario De Marco, Petra Makorič, Sinan Ogun, 2018, objavljeni povzetek znanstvenega prispevka na konferenci Opis: EcoLamb assesses the sustainability of diverse European sheep production systems focusing on the ecological footprint, animal welfare aspects and nutrition value of lamb meat. The outcomes of these assessments will be used to understand the potential future barriers that limit the innovative capacity and development of the sector and the opportunities that may provide a future market niche against competitive products from other global markets. Farm solutions that incorporate consumer expectations for animal welfare and meat quality will enhance the competitiveness of Europe's lamb meat sector. The project engages trans-national research and industry stakeholders from 6 countries made up of Germany, Italy, Portugal, Slovenia, Spain and Turkey to analyse on 20 case study farms resource-efficient, competitive and low-carbon lamb production models. Direct linkage between animal welfare, meat quality and pharmaceutical use will also be determined using innovative Precision Farming techniques. The project will produce a tool-box of recommendations for productive sheep farm management, supply chain and marketing on how to improve the acceptability of lamb meat by consumers. Thus, the multidisciplinary approach and the multi-actor involvement of the EU sheep sector will assist in re-designing critical aspects to increase society acceptance and the place of lamb meat in future diets and the outcomes of the project will be used by stakeholders to promote changes in farm management, marketing and processing of meat from sheep. Additionally, results will be used by farm consultants, farmer groups and policy officers to re-design consulting approaches and plan new initiatives to make all aspects of the European sheep industry more sustainable.
Ključne besede: sustainable, animal production, lamb, sheep, Jezersko-Solčavska, EcoLamb
Objavljeno v RUNG: 05.09.2018; Ogledov: 3621; Prenosov: 0
Gradivo ima več datotek! Več... |
72. Analiza mikroplastike v izbranih površinskih in podzemeljskih kraških vodahLara Valentić, 2018, magistrsko delo Opis: V okviru magistrskega dela smo se osredotočili na postojnsko in škocjansko območje, kjer so bila opravljena vzorčenja ponikalnic Pivke in Reke z delom njunih porečij ter jamami, ki so z rekama povezane. Vzorčenja smo opravili v površinskem toku obeh ponikalnic, iztoku iz čistilne naprave v Postojni in Ilirski Bistrici, v različnih vodnih telesih v jamah (ponvicah, lužah in podzemeljskem toku ponikalnic) ter deževnici na obeh območjih. V okolici Postojne smo vzorčili izvir Malni, ki celotno Pivško kotlino oskrbuje s pitno vodo, in površinski tok reke Unice na Planinskem polju. Na škocjanskem območju smo vzorčili iztok iz smetišča Globovnik pri Ilirski Bistrici, umetno jezero Mola, izvire Timave in izvir Brojenca, ki se neposredno izlivajo v Jadransko morje. Kjer je bilo mogoče, smo odvzeli tudi vzorce sedimenta.
Skupno je bilo z obeh območij zbranih 58 vzorcev vode in 29 vzorcev sedimenta. Izmed vseh 87 vzorcev je bila mikroplastika prisotna v 31 vzorcih – 26 je bilo vodnih vzorcev, mikroplastiko pa je vsebovalo tudi 5 vzorcev sedimenta. Vzorci sedimenta z mikroplastiko so bili najdeni izključno na škocjanskem območju. Mikroplastika je bila najdena tudi v vzorcih deževnice.
Ključne besede: mikroplastika, kraške vode, Postojnska jama, Škocjanske jame, porečje, vodni vzorci, vzorci sedimenta
Objavljeno v RUNG: 30.08.2018; Ogledov: 5092; Prenosov: 257
 Celotno besedilo (22,17 MB) |
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74. Prospects for lensed supernovae behind galaxy clusters with the James Webb Space TelescopeTanja 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. I will also show the expectations
of search campaigns that can be conducted with future facilities, such as the James Webb
Space Telescope (JWST) or the Wide-Field Infrared Survey Telescope (WFIRST).
Ključne besede: Strong lensing, Hubble constant, measuring expansion history with time delays, lensed supernovae
Objavljeno v RUNG: 09.07.2018; Ogledov: 3544; Prenosov: 139
Celotno besedilo (4,14 MB) |
75. Searching for supernovae in the multiply-imaged galaxies behind the gravitational telescope A370Tanja Petrushevska, Ariel Goobar, D. J. Lagattuta, R. Amanullah, Laura Hangard, S. Fabbro, C. Lindman, K. Paech, J. Richard, J.P. Kneib, 2017, izvirni znanstveni članek Opis: Aims. Strong lensing by massive galaxy clusters can provide magnification of the flux and even multiple images of the galaxies that lie behind them. This phenomenon facilitates observations of high-redshift supernovae (SNe) that would otherwise remain undetected. Type Ia supernovae (SNe Ia) detections are of particular interest because of their standard brightness, since they can be used to improve either cluster lensing models or cosmological parameter measurements.
Methods. We present a ground-based, near-infrared search for lensed SNe behind the galaxy cluster Abell 370. Our survey was based on 15 epochs of J-band observations with the HAWK-I instrument on the Very Large Telescope (VLT). We use Hubble Space Telescope (HST) photometry to infer the global properties of the multiply-imaged galaxies. Using a recently published lensing model of Abell 370, we also present the predicted magnifications and time delays between the images.
Results. In our survey, we did not discover any live SNe from the 13 lensed galaxies with 47 multiple images behind Abell 370. This is consistent with the expectation of 0.09 ± 0.02 SNe calculated based on the measured star formation rate. We compare the expectations of discovering strongly lensed SNe in our survey and that performed with HST during the Hubble Frontier Fields (HFF) programme. We also show the expectations of search campaigns that can be conducted with future facilities, such as the James Webb Space Telescope (JWST) or the Wide-Field Infrared Survey Telescope (WFIRST). We show that the NIRCam instrument aboard the JWST will be sensitive to most SN multiple images in the strongly lensed galaxies and thus will be able to measure their time delays if observations are scheduled accordingly.
Ključne besede: gravitational lensing: strong / supernovae: general / galaxies: clusters: individual: A 370
Objavljeno v RUNG: 28.06.2018; Ogledov: 3559; Prenosov: 139
Celotno besedilo (4,14 MB) |
76. Bi-magnetic composite nanoplatelets combining hard-magnetic barium hexaferrite core covered with soft magnetic iron oxide layerBlaž Belec, Darko Makovec, Goran Dražić, Benjamin Podmiljšak, Tanja Goršak, Sašo Gyergek, Matej Komelj, Josep Nogues, vabljeno predavanje na konferenci brez natisa Ključne besede: bi-magnetic nanoparticles, composite nanoparticles, exchange coupling
Objavljeno v RUNG: 05.06.2018; Ogledov: 3790; Prenosov: 0
Gradivo ima več datotek! Več... |
77. Supernovae seen through gravitational telescopesTanja Petrushevska, 2018, objavljeni povzetek znanstvenega prispevka na konferenci (vabljeno predavanje) 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 v RUNG: 03.05.2018; Ogledov: 3250; Prenosov: 0
Gradivo ima več datotek! Več... |
78. dr. Tanja Peric in dr. Sinan Ogun o projektu EcoLamb: ekološki odtis proizvodnje jagnjetine - možnosti in danostiMarija Brecelj, Tanja Peric, Sinan Ogun, 2018, radijska ali televizijska oddaja, podkast, intervju, novinarska konferenca Ključne besede: EcoLamb, ekološki odtis, jagnjetina, ovčjereja, dobrobit, kakovost, kortizol, dlaka, LCA, meso
Objavljeno v RUNG: 20.03.2018; Ogledov: 3869; Prenosov: 0 |
79. A first survey on hair cortisol of an Alpine ibex (Capra ibex ibex) population.Tanja Peric, Alberto Prandi, Mirco Corazzin, Antonella Comin, Monica Colitti, 2018, izvirni znanstveni članek Opis: Biometric measurements of horn, body and physiological variables of 35 Alpine ibex, Capra ibex ibex, (14 females and 21 males, age range: 2-15 years) were analysed in relation to gender and area of origin. Moreover, for the first time hair cortisol concentration was evaluated in this species. The ibexes were live-captured in spring in the Maritime Alps Natural Park. All the horn and body morphometric measurements were significantly different between genders and a statistical difference was found between horn and body data considering the area of origin of ibexes, with the exception of horn circumference and height as well of body and hock length. Among the physiological variables, female ibex showed higher heart rate and glycemia, but tended to have lower respiratory rate than male. The mean hair cortisol concentration was 22.40±1.44 pg/mg (±SE). A different distribution was described for the male hair cortisol concentrations compared to that in females. Obtained data indicate that the geographical area where Alpine ibex lives could affect the endurance of an ibex population but further investigations are needed to understand if intra- and inter-specific competition and different environment could be the basis of the HPA axis activation. Hair cortisol evaluation together with biometric values could be an interesting way to obtain information on the adaptation that the animal attempts to reach in relation to environmental factors and pursuing organism homeostasis. This feature could be important in attempting to preserve wildlife biodiversity that also depends from the state of animal welfare.
Ključne besede: allostatic load, Alps, ibex, biometry, hair cortisol
Objavljeno v RUNG: 06.03.2018; Ogledov: 4387; Prenosov: 0
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80. Ecological evaluation of aquatic and terrestrial subterranean fauna in a karst cavePeter Kozel, 2018, doktorska disertacija Opis: Studies on environmental parameters−subterranean fauna relationship and spatial and temporal patterns of subterranean fauna have dealt with either aquatic or terrestrial faunas. So far, no simultaneous ecological evaluation of aquatic and terrestrial faunas has been performed. To address this issue, we conducted a pilot study dealing in parallel with these two faunas in the cave Zguba jama near Postojna, Slovenia, applying monthly sampling over one year. Aquatic fauna was sampled from permanent water drips, and terrestrial fauna by visual inspection and advanced baited pitfall trapping, along with recording the main abiotic parameters. In percolating water, we recorded aquatic fauna, Copepoda being the dominant taxon, and species-rich troglobiotic fauna, which most probably coexist with aquatic species in a semi-aquatic epikarst environment. Analyses revealed that temperature, distance from the entrance and ceiling thickness are the most important parameters that influence the presence of stygobionts; higher values of these parameters result in a higher probability of the presence of stygobionts in percolation water. The recorded spatial distribution of stygobionts varied distinctly among the sampling sites. This indicates that fauna in sampled drips originated from aquatic or semiaquatic epikarst microhabitats, being completely or nearly completely separated from each other, and probably varied according to environmental characteristics. The temporal pattern of the stygobiotic fauna dynamics presumably occurred because of variable water flow rates and the specific physical and chemical characteristics of the water. The abundance of troglobionts showed distinctive spatial distribution pattern over the seasons. In spring and summer, the highest abundances and the highest probability of presence were found near the entrance. In autumn and winter, unfavorable conditions in the entrance zone most likely triggered the migration of troglobionts towards the climatically more stable deep cave zone, and from the cave into the adjacent fissure network. The highest abundance of troglobionts was found at 7–9°C and relatively high ground substrate moisture. Additionally, we found a higher probability of the presence of troglobionts in cave sections with a larger passage cross-section size, which is probably due to the greater variability of microhabitat types in spacious cave sections. In addition, the higher probability of presence relates to higher substrate pH. One potential explanation for this could be that the specific microorganism communities present in such conditions support the nutritional needs of troglobionts. Most troglobiotic species preferred the deep cave zone where the highest species richness and diversity were also observed. Species richness, abundance and diversity of troglophiles and trogloxenes were highest in the entrance zone and showed relatively similar patterns within the cave. However, troglophiles were more abundant in the transition zone and the initial part of the inner zone. The temporal pattern of trogloxenes and presumably of most troglophiles occurred because of migration between the surface and the cave. The probability of the presence of trogloxenes was highest in the entrance zone and in winter, owing to massive overwintering in the cave. A modified technique of pitfall trapping by placing traps in two parallel sets, a ground and an upper one along the cave, resulted in recording greater species diversity in comparison with the traditional method, i.e., ground pitfall trapping alone. It turned out that such sampling contributes at the same time to both more effective and less invasive inventory of subterranean fauna. The dynamics of relative abundance and species richness of stygobionts and troglobionts within the cave showed partly comparable annual patterns. Nevertheless, our findings point toward the need for a long-term and more detailed study in future to address this question properly.
Ključne besede: biological inventories, epikarst fauna, faunal dynamics, microhabitats, stygobionts, troglobionts, troglophiles, trogloxenes, Zguba jama
Objavljeno v RUNG: 16.02.2018; Ogledov: 4536; Prenosov: 315
Celotno besedilo (5,25 MB) |
