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61.
Technological and analytical review of contact tracing apps for COVID-19 management
Poonam Chaudhary, Saibal K. Pal, Rajan Gupta, Gaurav Pandey, 2021, original scientific article

Abstract: Role of technology is improving for COVID-19 management all around the world. Usage of mobile applications, web applications, cloud computing, and related technologies have helped many public administrators worldwide manage the current pandemic. Contact tracing applications are such mobile app solutions that are used by more than 100 countries today. This study presents a structured research review-based framework related to multiple contact tracing applications. The various components of the framework are related to technological working, design architecture, and feature analysis of the applications, along with the analysis of the acceptance of such applications worldwide. Also, components focusing on the security features and analysis of these applications based on Data Privacy, Security Vetting, and different attacks have been included in the research framework. Many applications are yet to explore the analytical capabilities of the data generated through contact tracing. The various use-cases identified for these applications are detecting positive case probability, identifying a containment zone in the country, finding regional hotspots, monitoring public events & gatherings, identifying sensitive routes, and allocating resources in various regions during the pandemic. This study will act as a guide for the users researching contact tracings applications using the proposed four-layered framework for their app assessment.
Found in: ključnih besedah
Summary of found: ...to technological working, design architecture, and feature analysis of the applications, along with the analysis...
Keywords: novel corona virus, location technology, contact tracing applications, Aarogya Setu App, data science, data analysis
Published: 02.04.2021; Views: 441; Downloads: 0
.pdf Fulltext (3,82 MB)

62.
Carcinogenic organic content of particulate matter at urban locations with different pollution sources
Gordana Pehnec, Ivana Jakovljević, Ranka Godec, Sabina Žero, Jasna Huremović, Katja Džepina, Zdravka Sever Štrukil, 2020, original scientific article

Abstract: Polycyclic aromatic hydrocarbons (PAHs) are compounds known for their adverse effects on human health. Many of them are proven carcinogens, especially those with 5 and 6 aromatic rings, which under normal tropospheric conditions are found in the particle-phase. Benzo(a)pyrene (BaP) is often measured as their general representative. Sarajevo, the capital of Bosnia and Herzegovina, is among the European cities with the poorest air quality. However, in Sarajevo PAHs are neither routinely measured within the air quality monitoring network nor have been a subject of extended, continuous field studies during the most polluted cold periods of the year. The capital of Croatia, Zagreb, is located approximately 300 km air distance north-west from Sarajevo. PAH mass concentrations in Zagreb have been measured continuously since 1994 within air quality monitoring networks. During winter 2017/2018, the SAFICA project (Sarajevo Canton Winter Field Campaign 2018) was carried out in order to characterize the chemical composition of organic and inorganic aerosol in the Sarajevo Canton. This paper presents the results of PAH measurements in the cities of Sarajevo and Zagreb at one urban location per city. Daily (24 h), continuous samples of PM10 (particulate matter with aerodynamic diameters ≤10 μm) were collected during heating season, from December 27, 2017 to February 27, 2018. Mass concentrations of eleven particle-phase PAHs in Sarajevo and Zagreb from filter samples collected during the same period were compared. The average BaP ambient mass concentrations in Sarajevo and Zagreb were 6.93 ng m−3 and 3.11 ng m−3, respectively. The contribution of BaP to the total PAH mass concentration was similar at both locations (11%). However, much higher contributions of particle-phase fluoranthene and pyrene were found in Sarajevo. Contributions of individual PAH, diagnostic ratios and factor analysis indicate that combustion of gasoline and diesel from vehicle traffic are a potential source of PAHs at both locations, as well as combustion of other liquid fossil fuels (petroleum and fuel oil). Wood burning was occasionally indicated as a PAH emission source in Zagreb, while in Sarajevo the contribution of PAHs from wood and coal combustion was more evident. Calculated value for total carcinogenic potency (TCP) of PAHs, which was estimated using toxic equivalence factors from the literature, in PM10 samples collected in Sarajevo was more than twice higher than in Zagreb (10.6 ng m−3 and 4.7 ng m−3, respectively). BaP had the highest contribution to the TCP at both locations (69 and 67%).
Found in: ključnih besedah
Summary of found: ...of individual PAH, diagnostic ratios and factor analysis indicate that combustion of gasoline and diesel...
Keywords: carcinogenic potency, diagnostic ratio, factor analysis, PM10, polycyclic aromatic hydrocarbons
Published: 09.04.2021; Views: 484; Downloads: 0
.pdf Fulltext (661,08 KB)

63.
Long-term ozone data analysis
Vjera Butković, Tomislav Cvitaš, Katja Džepina, Nenad Kezele, Leo Klasinc, 2002, original scientific article

Abstract: Various approaches to the analysis of 10-year continuous ozone monitoring from the EUROTRAC-TOR network station Puntijarka near Zagreb are reported. The site has a rural character (45.90degrees N; 15.97degrees E, 980 m a.s.l.) and is representative of the lower troposphere of a wider region. Mean hourly ozone volume fractions measured from 1990-1999, autocorrelation plots for all data and for data for summer periods (May-Sep.), box and whiskers representations of diurnal variations during winter (Nov.-March) and summer periods, mean monthly values and 12-month moving averages, and the Fourier transform of the complete set of 94,248 hourly mean ozone volume fractions are discussed. The data show no increase, or possibly a slight decrease, of the ozone volume fraction toward the end of the decade.
Found in: ključnih besedah
Keywords: long term ozone data, fourier analysis, ozone trend analysis, Puntijarka field station
Published: 12.04.2021; Views: 434; Downloads: 0
.pdf Fulltext (123,82 KB)

64.
Quality control of purified proteins to improve data quality and reproducibility: results from a large-scale survey
Ario De Marco, Bertrand Raynal, Kim Remans, Annabel Parret, Blanca Lopez-Mendez, André Matagne, Maria Garcia-Alai, Stefan H. Knauer, Mario Lebendiker, Stephan Uebel, Nick Berrow, 2021, original scientific article

Found in: ključnih besedah
Summary of found: ...protein quality, biophysical analysis, protein aggregates...
Keywords: protein quality, biophysical analysis, protein aggregates
Published: 22.04.2021; Views: 536; Downloads: 0
.pdf Fulltext (715,83 KB)

65.
Analiza utjecaja zagađenja zraka na zdravlje ljudi u Bosni i Hercegovini
Katja Džepina, 2018, unpublished conference contribution

Found in: ključnih besedah
Summary of found: ...Bosnia and Herzegovina, US EPA BenMAP, Cost-Benefit Analysis, Adverse health effects...
Keywords: PM2.5, Ozone, Sarajevo, Tuzla, Zenica, Bosnia and Herzegovina, US EPA BenMAP, Cost-Benefit Analysis, Adverse health effects
Published: 29.05.2021; Views: 388; Downloads: 0
.pdf Fulltext (644,83 KB)
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66.
An economic analysis of biomass potential as an opportunity to increase the share of biogas production for energy purposes in Slovenia
Stefan Dabižljević, 2021, master's thesis

Abstract: One of the biggest global problems, the solution of being put in front of the scientists around the world, is endangering the environment. To preserve it, the transition from non-renewable to renewable energy sources is a rational and necessary solution. One of the energy sources with great potential in the future is biomass. In the master’s thesis, we have studied the economic analysis of the possibility of obtaining energy from biogas in Slovenia for the production of which biomass is used. For the study to be successful, it was necessary to analyse the situation in the field of renewable energy sources and biogas in the European Union and Slovenia to obtain a general picture for further analysis. By analysing the available data from previous years, we gained insight into the situation in the given area. The master’s thesis aims to show that although Slovenia has been facing the problem of a decreasing number of biogas power plants for years, the implementation of a system for obtaining energy from biogas is an economically and environmentally viable investment. The economic analysis was done for a 1 MW plant. The choice of plant size and power was made based on the Kepner-Tregoe method and the method of comparing alternatives. For the project duration of 30 years, through cash flows, as well as through various economic indicators, such as the presentation of loan calculations with a certain interest rate, internal rate of return, repayment period method, present project value, etc., the economic side of the investment is presented, which aims to show the profitability of the project.
Found in: ključnih besedah
Keywords: Renewable energy sources, biomass, biogas, economic analysis, investment, project
Published: 07.09.2021; Views: 359; Downloads: 20
URL Fulltext (0,00 KB)
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67.
Vati, Kedumetse (PRC-JTU); Székelyhidi, László (H-LAJO-IM) Exponential monomials on hypergroup joins. (English summary) Miskolc Math. Notes 21 (2020), no. 1, 463-472
Irina Elena Cristea, 2021, review, book review, critique

Found in: ključnih besedah
Summary of found: ...spectral analysis, hypergroup join, exponential polynomial...
Keywords: spectral analysis, hypergroup join, exponential polynomial
Published: 02.07.2021; Views: 376; Downloads: 4
URL Fulltext (0,00 KB)
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68.
Improved photocatalytic activity of SnO[sub]2-TiO[sub]2 nanocomposite thin films prepared by low-temperature sol-gel method
Urška Lavrenčič Štangar, Giovanni Palmisano, Matjaž Valant, Mattia Fanetti, Samar Al Jitan, Iztok Arčon, Ksenija Maver, 2021, original scientific article

Abstract: The objective of this research was to investigate how the photocatalytic activity of pure TiO2 can be improved by SnO2 modification. Different molar ratios of tin to titanium were prepared. The correlation between tin concentration and structural properties was investigated to explain the mechanism of photocatalytic efficiency and to optimize the synthesis conditions to obtain enhanced activity of the SnO2-modified TiO2 photocatalysts under UV-irradiation. The SnO2-modified TiO2 photocatalysts were prepared by a low-temperature sol-gel method based on organic tin and titanium precursors. The precursors underwent sol-gel reactions separately to form SnO2-TiO2 sol. The sol-gels were deposited on a glass substrate by a dip-coating technique and dried at 150 ◦C to obtain the photocatalysts in the form of a thin film. To test the thermal stability of the material, an additional set of photocatalysts was prepared by calcining the dried samples in air at 500 ◦C. The photocatalytic activity of the samples was determined by measuring the degradation rate of an azo dye. An increase of up to 30% in the photocatalytic activity of the air-dried samples was obtained when the TiO2 was modified with the SnO2 in a concentration range of 0.1–1 mol.%. At higher SnO2 loadings, the photocatalytic activity of the photocatalyst was reduced compared to the unmodified TiO2. The calcined samples showed an overall reduced photocatalytic activity compared to the air-dried samples. Various characterization techniques (UV-Vis, XRD, N2-physisorption, TEM, EDX, SEM, XAS and photoelectrochemical characterization) were used to explain the mechanism for the enhanced and hindered photocatalytic performances of the SnO2-modified TiO2 photocatalysts. The results showed that the nanocrystalline cassiterite SnO2 is attached to the TiO2 nanocrystallites through the Sn-O-Ti bonds. In this way, the coupling of two semiconductors, SnO2 and TiO2, was demonstrated. Compared to single-phase photocatalysts, the coupling of semiconductors has a beneficial effect on the separation of charge carriers, which prolongs their lifetime for accessibility to participate in the redox reactions. The maximum increase in activity of the thin films was achieved in the low concentration range (0.1–1 mol.%), which means that an optimal ratio and contact of the two phases is achieved for the given physical parameters such as particle size, shape and specific surface area of the catalyst.
Found in: ključnih besedah
Keywords: photocatalytic activity, Sn-modified TiO2, low-temperature, thin films, XAS analysis
Published: 05.07.2021; Views: 364; Downloads: 0
.pdf Fulltext (5,18 MB)

69.
Untargeted molecular analysis of exhaled breath as a diagnostic test for ventilator-associated lower respiratory tract infections (BreathDx)
Murtaza Bulut, Waqar Ahmed, Antonio Artigas, Iain R. White, Hugo Knobel, Timothy Felton, Nicholas J. W. Rattray, Oluwasola Lawal, Pouline M. van Oort, Tamara M. E. Nijsen, 2021, short scientific article

Abstract: Patients suspected of ventilator-associated lower respiratory tract infections (VA-LRTIs) commonly receive broad-spectrum antimicrobial therapy unnecessarily. We tested whether exhaled breath analysis can discriminate between patients suspected of VA-LRTI with confirmed infection, from patients with negative cultures. Breath from 108 patients suspected of VA-LRTI was analysed by gas chromatography-mass spectrometry. The breath test had a sensitivity of 98% at a specificity of 49%, confirmed with a second analytical method. The breath test had a negative predictive value of 96% and excluded pneumonia in half of the patients with negative cultures. Trial registration number: UKCRN ID number 19086, registered May 2015.
Found in: ključnih besedah
Keywords: ventilator-associated pneumonia, breath analysis, volatile organic compounds, metabolomics, intensive care, hospital acquired infections
Published: 07.09.2021; Views: 304; Downloads: 0
.pdf Fulltext (352,35 KB)

70.
L'uso dell'inglese L2 e la correzione degli errori in due lezioni alla scuola media
Greta Mazzaggio, 2012, undergraduate thesis

Abstract: In our globalized and multi-cultural society, communicating between different nationalities becomes more and more important. Language remains a paramount aspect of cultural dialogue and English as lingua franca is the undisputed medium of communication, taught everywhere at an early age. In Italy English is taught since elementary school, sometimes even in kindergarten, when children’s linguistic abilities are stronger; however, teachers usually fail to make the most out of such abilities, as their lessons are primarily in Italian and the use of English is limited to some words or expressions targeted by exercises. With such an input, the children’s progress is likely to be limited. My experiment attempts to assess the interaction student-teacher in terms of use of L2 in class by means of a comparative analysis of two middle-school lessons taught by the same teacher to different age groups. Moreover, teacher’s correction techniques will be assessed in the light of frameworks established by scholars in this field, where the positive value of errors in the development of children interlanguage emerges with clarity. Since feedback is an essential part of education, special attention was paid to the teacher’s behavior in dealing with student’s mistakes. Two entire lessons were recorded and transcribed, counting the numbers of words and turns uttered respectively by students and the teacher. When collected and analyzed, such data exhibited both similarities and differences between classes. On the teacher’s side, both lessons revealed that she adopts a rather conservative style of teaching, with limited interaction. As a result, the lessons are to be considered teacher-oriented, for the distribution of turns and the amount of words exchanged; conducted along the textbook’s lines, they offer very limited room for creative language production. Moreover, the teacher’s tendency to steadily correct the students, with the only exception of pronunciation errors, impairs student’s communicative fluency at large. However, a certain progress may be observed between the 1st and 3rd class in both the increased command of English and the number of errors, decreased by almost 50%. In both cases, though, the production of English sentences is creative only for a minimal part, as English is often read and lessons are mostly based on the correction of homework and written exercises. In conclusion, the experiment offers data that confirm several assumptions of contemporary linguistics, particularly in the field of Second Language Acquisition and Error Analysis.
Found in: ključnih besedah
Summary of found: ...in class by means of a comparative analysis of two middle-school lessons taught by the...
Keywords: Second Language Acquisition, Error Analysis, Italian, English as L2
Published: 22.09.2021; Views: 172; Downloads: 0
.pdf Fulltext (612,48 KB)

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