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51.
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53.
Bistra's Adventures
Nika Simčič, Klemen Levičnik, Tina Mahnič, 2019, druge monografije in druga zaključena dela

Najdeno v: osebi
Ključne besede: environment, environmental awareness, invasive species, water pollution
Objavljeno: 28.11.2019; Ogledov: 600; Prenosov: 0
.pdf Polno besedilo (476,21 KB)

54.
Španska gripa na Goriškem v letu 1918
Martin Batagelj, 2020, diplomsko delo

Opis: V uvodu diplomske naloge bom najprej utemeljil razloge za izbrano temo ter s pomočjo literature opisal bolezen in njene značilnosti ter natančno predstavil simptome. V nadaljevanju se bom posvetil orisu problematike na globalni ravni, torej začetku širjenja pandemije po svetu, saj naj bi bolezen aprila 1918 z okuženimi ameriškimi vojaki začela svoj smrtonosni pohod po Evropi, kjer se je razširila po bojnem polju in med civilisti. Seveda bom na tem mestu predstavil tudi vlogo bolezni pri odvijanju vojne ter na kakšen način je pandemija vplivala na njen razplet. Ob tem bom izpostavil posameznika, ki je pri iskanju rešitve problema namenil veliko truda ter kot načelnik zdravstvene službe v Manchestru z daljnovidnimi nasveti in ukrepi preprečil, da bi bolezen terjala še večji davek. To je bil škotski zdravnik dr. James Niven, pri opisu njegovega prispevka proti pandemiji pa mi bodo pomagala tudi poročila njegovih opažanj obolelih. V osrednjem delu diplomske naloge se bom najprej posvetil širjenju španske gripe na področju današnje Slovenije. Na tem mestu bom predstavil odziv medijev na pojav in smrtonosnost gripe; predvsem v časopisih Slovenec, Slovenski narod, Štajerc in še drugih. V veliko pomoč mi bodo tudi šolske, župnijske in ostale kronike, ki so jih ljudje pisali v tistih dneh. Največjo pozornost pa bom namenil pojavu in posledicam pandemije na Goriškem. Na tem mestu bom na kratko orisal tudi stanje v regiji po soških bitkah, stanje beguncev in vrnitev vojakov s front ter obširno predstavil pojav in širjenje bolezni ter odziv nanjo. Pri tem si bom pomagal z lokalnimi in župnijskimi kronikami ter časopisnimi članki. Nazadnje bom predstavil resnično zgodbo o tem, kako se moji predniki soočali s špansko gripo. Diplomsko delo bom zaključil s sklepom, v katerem bom povzel celotno temo diplomske naloge, poudaril glavna spoznanja pri njeni izdelavi in predstavil medicinske raziskave povezane s špansko gripo v 21. stoletju.
Najdeno v: osebi
Ključne besede: španska gripa, Goriška, influenca, zgodovina bolezni, pandemija
Objavljeno: 08.07.2020; Ogledov: 455; Prenosov: 39
.pdf Polno besedilo (2,93 MB)

55.
Trace detection of C2H2 in ambient air using continuous wave cavity ring-down spectroscopy combined with sample pre-concentration
Orr-Ewing Andrew, Damien Martin, Iain White, Roberto Grilli, Ruth Lindley, Manik Pradhan, 2008, izvirni znanstveni članek

Opis: Continuous wave cavity ring-down spectroscopy (cw-CRDS) coupled with sample pre-concentration has been used to measure acetylene (C2H2) mixing ratios in ambient air. Measurements were made in the near-infrared region (λ∼1535.393 nm), using the P(17) rotational line of the (ν1+ν3) vibrational combination band, a region free from interference by overlapping spectral absorption features of other air constituents. The spectrometer is shown to be capable of fast, quantitative and precise C2H2 mixing ratio determinations without the need for gas chromatographic (GC) separation. The current detection limit of the spectrometer following sample pre-concentration is estimated to be 35 parts per trillion by volume (pptv), which is sufficient for direct atmospheric detection of C2H2 at concentrations typical of both urban and rural environments. The CRDS apparatus performance was compared with an instrument using GC separation and flame ionization detection (GC-FID); both techniques were used to analyze air samples collected within and outside the laboratory. These measurements were shown to be in quantitative agreement. The indoor air sample was found to contain C2H2 at a mixing ratio of 3.87±0.22 ppbv (3.90±0.23 ppbv by GC-FID), and the C2H2 fractions in the outside air samples collected on two separate days from urban locations were 1.83±0.20 and 0.69±0.14 ppbv (1.18±0.09 and 0.60±0.04 ppbv by GC-FID). The discrepancy in the first outdoor air sample is attributed to degradation over a 2-month interval between the cw-CRDS and GC-FID analyses.
Najdeno v: osebi
Ključne besede: Rotational Line, Cavity Enhance Absorption Spectroscopy, Adsorbent Trap, Trace Atmospheric Constituent, CRDS Instrument
Objavljeno: 15.07.2019; Ogledov: 801; Prenosov: 0
.pdf Polno besedilo (363,50 KB)

56.
A study of pollutant concentration variability in an urban street under low wind speeds
Adrian Dobre, Graham Nickless, Iain R White, Catheryn S Price, Damien Martin, Dudley E Shallcross, 2008, izvirni znanstveni članek

Opis: The short time‐scale variability in pollutant concentrations in an urban street under very low wind speed conditions and short source–receptor distance has been investigated using the inert tracer sulfur hexafluoride (SF6) as a continuous point‐source (release times ≥ 5 min), and fast detection using separation by gas chromatography coupled with a μ‐electron capture detector (ECD). The results are complex but can be broadly interpreted in terms of horizontal wind speed and direction coherence. Comparisons with a simple dispersion model suggest that observed time‐averaged maximum concentrations approach predicted values, whilst instantaneous maximum concentrations vary greatly and would therefore be difficult to predict.
Najdeno v: osebi
Ključne besede: dispersion, tracer, intermittency
Objavljeno: 17.07.2019; Ogledov: 796; Prenosov: 39
.pdf Polno besedilo (289,67 KB)

57.
Year-long measurements of C1-C3 halocarbons at an urban site and their relationship with meteorological parameters
Dudley E Shallcross, Brian G R Greally, Alison C Rivett, Damien Martin, Alan Knights, Graham Nickless, Ben Golledge, Iain R White, M Iqbal Mead, M Anwar K Khan, 2009, izvirni znanstveni članek

Opis: The mixing ratios of 11 C1–C3 halocarbons have been measured using a GC–twin‐linked ECD system over the period from October 2004 to December 2005 at an urban site in Bristol, UK. Time series and seasonal variations of the halocarbons were analysed over the period to determine biogenic and anthropogenic sources and sinks. Correlations between the target halocarbons were also observed, suggesting common sources within the area. Wind rose plots for all halocarbons have been used to assist in the determination of halocarbons sources. Halocarbon concentrations are highest at low‐wind speeds and decrease as wind speed increases, a few species (CCl4 and CH3Cl most notably) rise at very high‐wind speeds suggesting release from the Bristol Channel.
Najdeno v: osebi
Ključne besede: adsorption–desorption system, anthropogenic halocarbons, biogenic halocarbons, electron capture detector, gas chromatography, methyl bromide
Objavljeno: 18.07.2019; Ogledov: 678; Prenosov: 0
.pdf Polno besedilo (897,06 KB)

58.
Dispersion experiments in central London: The 2007 DAPPLE project
Curtis R Wood, Samantha J Arnold, Ahmed A Balogun, Janet F Barlow, Stephen E Belcher, Rex E Britter, Hong Cheng, Adrian Dobre, Justin J N Lingard, Damien Martin, Marina K Neophytou, Fredrik K Petersson, Alan G Robins, Dudley E. Shallcross, Robert J Smalley, James E Tate, Alison S Tomlin, Iain R White, 2009, izvirni znanstveni članek

Opis: In the event of a release of toxic gas in the center of London, emergency services personnel would need to determine quickly the extent of the area contaminated. The transport of pollutants by turbulent flow within the complex streets and building architecture of London, United Kingdom, is not straightforward, and we might wonder whether it is at all possible to make a scientifically reasoned decision. Here, we describe recent progress from a major U.K. project, Dispersion of Air Pollution and its Penetration into the Local Environment (DAPPLE; information online at www.dapple.org.uk). In DAPPLE, we focus on the movement of airborne pollutants in cities by developing a greater understanding of atmospheric flow and dispersion within urban street networks. In particular, we carried out full-scale dispersion experiments in central London from 2003 through 2008 to address the extent of the dispersion of tracers following their release at street level. These measurements complemented previous studies because 1) our focus was on dispersion within the first kilometer from the source, when most of the material was expected to remain within the street network rather than being mixed into the boundary layer aloft; 2) measurements were made under a wide variety of meteorological conditions; and 3) central London represents a European, rather than North American, city geometry. Interpretation of the results from the full-scale experiments was supported by extensive numerical and wind tunnel modeling, which allowed more detailed analysis under idealized and controlled conditions. In this article, we review the full-scale DAPPLE methodologies and show early results from the analysis of the 2007 field campaign data.
Najdeno v: osebi
Ključne besede: Air quality, Atmospheric thermodynamics, Dispersions, Experiments
Objavljeno: 18.07.2019; Ogledov: 735; Prenosov: 0
.pdf Polno besedilo (17,86 MB)

59.
CityFlux perfluorocarbon tracer experiments
Fredrik K Petersson, Damien Martin, Iain R White, Stephen J Henshaw, Graham Nickless, Ian Longley, Carl J Percival, Martin Gallagher, Dudley E. Shallcross, 2010, izvirni znanstveni članek

Opis: In June 2006, two perfluorocarbon tracer experiments were conducted in central Manchester UK as part of the CityFlux campaign. The main aim was to investigate vertical dispersion in an urban area during convective conditions, but dispersion mechanisms within the street network were also studied. Paired receptors were used in most cases where one receptor was located at ground level and one at roof level. One receptor was located on the roof of Portland Tower which is an 80m high building in central Manchester. Source receptor distances in the two experiments varied between 120 and 600 m. The results reveal that maximum concentration was sometimes found at roof level rather than at ground level implying the effectiveness of convective forces on dispersion. The degree of vertical dispersion was found to be dependent on source receptor distance as well as on building height in proximity to the release site. Evidence of flow channelling in a street canyon was also found. Both a Gaussian profile and a street network model were applied and the results show that the urban topography may lead to highly effective flow channelling which therefore may be a very important dispersion mechanism should the right meteorological conditions prevail. The experimental results from this campaign have also been compared with a simple urban dispersion model that was developed during the DAPPLE framework and show good agreement with this. The results presented here are some of the first published regarding vertical dispersion. More tracer experiments are needed in order to further characterise vertical concentration profiles and their dependence on, for instance, atmospheric stability. The impact of urban topography on pollutant dispersion is important to focus on in future tracer experiments in order to improve performance of models as well as for our understanding of the relationship between air quality and public health.
Najdeno v: osebi
Ključne besede: air quality, atmospheric chemistry, concentration (composition), convective system, dispersion, public health, street canyon, tracer, urban area
Objavljeno: 18.07.2019; Ogledov: 686; Prenosov: 0
.pdf Polno besedilo (1,07 MB)

60.
Urban tracer dispersion experiments during the second DAPPLE field campaign in London 2004
Damien Martin, Catheryn S Price, Iain R White, Graham Nickless, K Fredrik Petersson, Rex E Britter, Alan G Robins, Stephen E Belcher, Janet F Barlow, Marie Neophytou, Samantha J Arnold, Alan S Tomlin, Robert J Smalley, Dudley E. Shallcross, 2010, izvirni znanstveni članek

Opis: As part of the DAPPLE programme two large scale urban tracer experiments using multiple simultaneous releases of cyclic perfluoroalkanes from fixed location point sources was performed. The receptor concentrations along with relevant meteorological parameters measured are compared with a three screening dispersion models in order to best predict the decay of pollution sources with respect to distance. It is shown here that the simple dispersion models tested here can provide a reasonable upper bound estimate of the maximum concentrations measured with an empirical model derived from field observations and wind tunnel studies providing the best estimate. An indoor receptor was also used to assess indoor concentrations and their pertinence to commonly used evacuation procedures.
Najdeno v: osebi
Ključne besede: Dapple, dispersion
Objavljeno: 18.07.2019; Ogledov: 682; Prenosov: 0
.pdf Polno besedilo (1,69 MB)

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