Repozitorij Univerze v Novi Gorici

Iskanje po repozitoriju
A+ | A- | Pomoč | SLO | ENG

Iskalni niz: išči po
išči po
išči po
išči po
* po starem in bolonjskem študiju


1 - 10 / 5933
Na začetekNa prejšnjo stran12345678910Na naslednjo stranNa konec
Contribution of black carbon and desert dust to aerosol absorption in the atmosphere of the Eastern Arabian Peninsula
Mohamed M. K. Mahfouz, Gregor Skok, Jean Sciare, Michael Pikridas, M. R. Alfarra, Shamjad Moosakutty, Bálint Alföldy, Matic Ivančič, Martin Rigler, Asta Gregorič, Rok Podlipec, Griša Močnik, 2024, izvirni znanstveni članek

Opis: Discriminating the absorption coefficients of aerosol mineral dust and black carbon (BC) in different aerosol size fractions is a challenge because of BC's large mass absorption cross-section compared to dust. Ambient aerosol wavelength dependent absorption coefficients in supermicron and submicron size fractions were determined with a high time resolution. The measurements were performed simultaneously using identical systems at an urban and a regional background site in Qatar. At each site, measurements were taken by co-located Aethalometers, one with a virtual impactor (VI) and the other with a PM1 cyclone to respectively collect super-micron-enhanced and submicron fractions. The combined measurement of aerosol absorption and scattering coefficients enabled the particles to be classified based on their optical properties' wavelength dependence. The classification reveals the presence of BC internally/externally mixed with different aerosols. Helium ion microscopy images provided information concerning the extent of mineral dust in the submicron fraction. The determination of absorption coefficients during dust storms and non-dust periods was used to establish the absorption Ångström exponent for dust and BC. Non-parametric wind regression, potential source contribution function and back-trajectory analysis reveal major regional sources of desert dust associated with north-westerly winds and a minor local dust contribution. In contrast, major BC sources found locally were associated with south-westerly winds with a smaller contribution made by offshore emissions transported by north-easterly and easterly winds. The use of a pair of Aethalometers with VI and PM1 inlets separates contributions of BC and dust to the aerosol absorption coefficient.
Ključne besede: aerosol absorption, black carbon, mineral dust, desert dust, Arabian Peninsula
Objavljeno v RUNG: 29.02.2024; Ogledov: 11; Prenosov: 0
.pdf Celotno besedilo (3,52 MB)
Gradivo ima več datotek! Več...

Performance analysis of high-spectral-resolution lidar with/without laser seeding technique for measuring aerosol optical properties
Fengjia Gao, Fei Gao, Gaipan Li, Fan Yang, Li Wang, Song Yuehui, Dengxin Hua, Samo Stanič, 2024, izvirni znanstveni članek

Opis: High-spectral-resolution lidar (HSRL) is a powerful tool for aerosol measurements. With/without laser seeding technique in the transmitted laser, the HSRL can be distinguished as the single-longitudinal-mode (SLM) HSRL or the multi-longitudinal-mode (MLM) HSRL, and the Mach-Zehnder interferometer (MZI) with periodic transmittance function can be used as the spectral discriminator in both the SLM HSRL and MLM HSRL. To in-depth knowledge of the respective advantages of the SLM HSRL and MLM HSRL for measuring aerosol optical properties, the working principle, optimal parameter setting, and detection performance of the SLM HSRL and MLM HSRL are analyzed and discussed in detail, respectively. The working principle of the SLM HSRL and MLM HSRL indicate that the effective transmittance of MZI is the important parameter of data retrieval, the main source of retrieval uncertainties, and the key factor of MZI optical path difference (OPD) settings. To ensure that the MZI can achieve the preferable separation for aerosol Mie scattering signals and molecular Rayleigh scattering signals, the optimal OPDs of MZI are set at 165 mm and 1000 mm in the SLM HSRL and MLM HSRL from the aspects of the effective transmittance of MZI and the spectral discrimination ratio (SDR). Besides, to analyze the influence of frequency difference and divergence angle for the detection performance of HSRL, the effective transmittance of MZI and SDR are simulated and the results show that the MLM HSRL has higher requirements for the environmental parameters and the echo beam collimation than the SLM HSRL. Moreover, the HSRLs with SLM and MLM transmitted lasers are constructed in Xi'an for measuring aerosol optical properties. The preliminary measurement results show that the range square corrected signal (RSCS) of Rayleigh channel is smaller than that of Mie channel in both the SLM HSRL and MLM HSRL, while the difference between RSCS of Rayleigh channel and RSCS of Mie channel in the SLM HSRL is larger than that in the MLM HSRL, and the detection range of the SLM HSRL is lower than that of the MLM HSRL.
Ključne besede: aerosol optical properties, high-spectral-resolution lidar, single-longitudinal-mode, multi-longitudinal-mode, spectral discrimination ratio
Objavljeno v RUNG: 28.02.2024; Ogledov: 39; Prenosov: 0
URL Povezava na datoteko
Gradivo ima več datotek! Več...

Stress and morphology in the Italian verb system
Elena Guerzoni, 2000, druge monografije in druga zaključena dela

Opis: In this paper I present an analysis of stress in Italian verbs. A preliminary comparison between nouns and adjectives on the one hand and verbs on the other reveals that these the two classes of words differ in an interesting way when it comes to stress assignment: while on a noun or adjective stress can be predicted to a large extent on the basis of a stress rule that fully coincides with the main stress rule of Classical Latin, inflection affects stress position on verbs in an apparently unpredictable fashion. Although, at first sight, this difference seems to preclude a unified account of stress in the language, this paper shows that once the additional morphological complexity of verbs is factored in, it is in fact the same algorithm that assigns stress in both word classes.
Ključne besede: Italian verb, tense, stress
Objavljeno v RUNG: 27.02.2024; Ogledov: 57; Prenosov: 0
Gradivo ima več datotek! Več...

System and method for continuous wave low power laser based synthesis of metal nano particles : patent certificate IN 512589, 2024-02-20
Sankaranarayana Iyer Sankararaman, Mohanachandran Nair Sindhu Swapna, Abdul Rahim Sajeela Beevi Ashik, Ramachandran Nair Amba Devi Krishnanunni, Vadakkedathu Parameswaran Narayanan Nampoori, 2024, patent

Opis: This disclosure relates to synthesis of metal nanoparticles (NPs). In particular, the invention relates to methods of synthesizing metal nanoparticles using Laser. The invention relates to Laser assisted synthesis of metal nanoparticles using continuous wave low laser power in a liquid medium. The system [100] for synthesis of metal nanoparticles, comprises of a laser source [101], a mechanical chopper [102], a lens [103], a target metal [104], a liquid medium [106] and a heat source [107]. Additionally the invention relates to laser assisted synthesis of metal nanoparticles with silver as the metal target and water as the liquid medium. The NPs produced are characterized by UV-Visible spectrophotometer, Field-emission Scanning Electron Microscope (FESEM), Energy Dispersive X-Ray Spectroscopy (EDS), and Transmission Electron Microscopy (TEM).Figure 1.
Ključne besede: cw laser, nanoparticle, method
Objavljeno v RUNG: 26.02.2024; Ogledov: 95; Prenosov: 1
URL Povezava na datoteko
Gradivo ima več datotek! Več...

Literatura na stičišču : študijsko gradivo: pomlad 2022/2023
Primož Mlačnik, 2022, drugo učno gradivo

Opis: Dano študijsko gradivo v grobem predstavlja transkripcije predavanj doc. dr. Primoža Mlačnik pri nadomestni izvedbi študijskega predmeta Literatura na stičišču v spomladanskem semestru študijskega leta 2022/2023. Vsebuje osnovno teorijo imagološkega pristopa k preučevanju književnosti in temeljne imagološke razprave, uvod v teorijo in praktične pomene etnocentrizma in kulturnega relativizma, nabor teorij med manjšinsko književnostjo in književnostjo manjšin na primerih obmejnih slovenskih, italijanskih in istrskih pesnikov ter pisateljev (velja za oba spola) različnih generacij 20. stoletja in zapiske iz dveh temeljnih del Ane Toroš. Študijsko gradivo ni namenjeno javni uporabi.
Ključne besede: imagologija, imagološka podoba, manjšinska književnost, književnost manjšin, etnocentrizem, kulturni relativizem, tržaška književnost, študijsko gradivo
Objavljeno v RUNG: 26.02.2024; Ogledov: 103; Prenosov: 0
Gradivo ima več datotek! Več...

NPIs, questions and negation : lecture at the Lingday 2015, 8. 6. 2015, Boğaziçi University, Beşiktaş
Elena Guerzoni, 2015, prispevek na konferenci brez natisa

Ključne besede: NPIs, Questions
Objavljeno v RUNG: 22.02.2024; Ogledov: 212; Prenosov: 1
URL Povezava na datoteko
Gradivo ima več datotek! Več...

The scope of scalarity, additivity, & exclusivity in the composition of some NPIs
Elena Guerzoni, 2007, vabljeno predavanje na konferenci brez natisa

Ključne besede: Scalarity, Additivity, NPIs
Objavljeno v RUNG: 21.02.2024; Ogledov: 236; Prenosov: 1
URL Povezava na datoteko
Gradivo ima več datotek! Več...

NPI-Intervention and Alternative Questions
Elena Guerzoni, 2011, prispevek na konferenci brez natisa

Ključne besede: Intervention, NPIs, Alternative Questions
Objavljeno v RUNG: 21.02.2024; Ogledov: 217; Prenosov: 1
URL Povezava na datoteko
Gradivo ima več datotek! Več...

Iskanje izvedeno v 0.44 sek.
Na vrh