1. Vehicles leasing operations in Lagos state, NigeriaMuse Olayiwola Solanke, Bashiru Adisa Raji, Taiwo Kareem Alli, 2019, izvirni znanstveni članek Opis: Vehicle is an important element of transport; and its financing especially in road transport comes in 3 ways; outright purchase, hire purchase and lease. Of all these three methods of road transport financing, leasing has attracted little attention in Nigeria transport research. This study was carried out to examine the development, types and form, operating characteristics and problems of vehicle lease in Lagos State, Nigeria. Aggregate number of vehicle leasing companies in Nigeria from inception to 2018 was obtained from corporate affairs commission (CAC). Four prominent vehicle leasing companies: Cashlink Leasing Plc (CLP), NIKKY Taurus Ltd (NTL), C & I Leasing (CIL) and SAMTL Leasing Ltd (SLL) were purposively selected for the operating characteristics and challenges of the leasing companies. 298 structured questionnaires were administered to the staffs of the selected companies seeking the types and forms of lease and challenges encountered in the course of operation using stratified and simple random samplings techniques. Vehicle leasing started in Nigeria from 1986 with the likes of pine hill leasing, Cashlink leasing, VT leasing in Lagos. Within 1986 and 2018, it has spread to 23 different urban cities and the number has increased to 297 companies in 2018. Operating and finance leases exist in the industry with majority of 91.6% of the companies practice operating lease. The staff strength and fleet size level of the leasing companies varies overtime but positively significant to their operations. However, poor pricing of lease service, inadequate finance of vehicle, default in payment of rental charges and high cost of maintenance minimize leasing service efficiency and effectiveness. It is recommended that government should provide subvention for vehicles acquisition, face-off of racketing vehicles from cites and legislate policy to regulate operational activities (entry and exit) of the companies. Ključne besede: leasing companies, Nigeria, operating characteristics, vehicle leasing Objavljeno v DKUM: 22.08.2024; Ogledov: 52; Prenosov: 2 Celotno besedilo (517,49 KB) Gradivo ima več datotek! Več... |
2. Presence of alien Prunus serotina and Impatiens parviflora in lowland forest fragments in NE SloveniaMirjana Šipek, Eva Horvat, Ivana Vitasović Kosić, Nina Šajna, 2022, izvirni znanstveni članek Opis: Temperate alluvial, riparian and lowland forests are the European forests with the greatest presence of invasive alien plants. Consequently, identifying the environmental conditions for and other drivers behind the establishment of invasive species in natural forest communities is crucial for understanding the invasibility of these habitats. We focused on fragments (patches) of Illyrian oak-hornbeam forest in NE Slovenia, which are the least studied in this regard. Because alien phanerophytes and therophytes are significantly over-represented compared to native plantsin lowland forests, we selected two representative invasives: the phanerophyte Prunus serotina and the therophyte Impatiens parviflora. By using logistic regression models on vegetation surveys, environmental data based on Ellenberg´s indicator values, and patch metrics, we identified patch characteristics explaining the presence of each species. Moreover, we included human impact in the models. We reveal significant characteristics differentiating P. serotina from I. parviflora. We also show that the perimeterarea ratio and soil nutrients of the forest patches correlate significantly with the presence of P. serotina, while human disturbance correlates significantly with the presence of I. parviflora. Our results and a similar approach for other invasive plant species can be applied to assess habitat invasibility on potential and species’ current geographic distribution, as well as to develop management plans. Ključne besede: biological invasions, forest fragmentation, landscape metrics, habitat characteristics, human presence, anthropogenic factors, neophytes, Slovenia Objavljeno v DKUM: 12.07.2024; Ogledov: 136; Prenosov: 6 Celotno besedilo (460,99 KB) Gradivo ima več datotek! Več... |
3. The interplay of restaurant SMEs' entrepreneurial and environmental characteristics, management of the requisite assets, and operational efficiencyTanja Planinc, Marko Kukanja, Anja Žnidaršič, 2022, izvirni znanstveni članek Opis: Background/Purpose: SMEs are subject to different factors in the business environments that influence their business performance. Considering the importance of restaurants’ environmental characteristics, entrepreneurs can also, through their entrepreneurial characteristics, influence SMEsʼ management of the requisite assets (MRA). Accordingly, this study examines the influence of restaurant SMEs’ entrepreneurial (self-efficacy, orientation, and demographics) and environmental (location, size, and competition) characteristics on MRA and, consequently, on SMEs’ operational efficiency.
Methods: Primary data relating to the environmental (location, size, and competition) and entrepreneurial (self-efficacy, orientation, and demographic) characteristics were obtained using a survey questionnaire, while the secondary data were obtained from SMEs’ official financial reports. The sample consists of 266 restaurant SMEs in the Republic of Slovenia. Efficiency was analysed using data envelopment analysis (DEA), and structural equation modelling (SEM) was used to test the research model.
Results: The results indicate that environmental characteristics have a much more significant impact on MRA than entrepreneurial characteristics. Entrepreneurial self-efficacy and most demographic characteristics (age, gender, education, and experience) proved not to influence significantly MRA and, consequently, SMEs’ operational efficiency.
Conclusion: SMEs’ external environment is generally not directly influenced by managerial decisions. Therefore, it is critical to strengthen the influence of the internal environment through an active development of entrepreneurial characteristics, which could result in a more effective MRA and higher efficiency. The conclusion provides suggestions for future research and valuable information for entrepreneurs, academia, and policymakers. Ključne besede: SMEs, restaurant industry, Slovenia, efficiency, environmental and entrepreneurial characteristics, requisite assets Objavljeno v DKUM: 28.06.2024; Ogledov: 418; Prenosov: 11 Celotno besedilo (2,05 MB) Gradivo ima več datotek! Več... |
4. Optical characteristics of directly deposited gold nanoparticle filmsJordi Sancho-Parramon, Tilen Švarc, Peter Majerič, Žiga Jelen, Rebeka Rudolf, 2024, izvirni znanstveni članek Opis: The manuscript presents the optical properties of directly deposited films of gold nanoparticles (AuNPs) prepared by the Ultrasonic Spray Pyrolysis (USP) technology. Four samples were produced, with AuNP deposition times on the glass substrate of 15 min, 30 min, 1 h and 4 h. The morphological characterisation of the deposited films showed that the size of the first deposited AuNPs was between 10 and 30 nm, while, with a longer duration of the deposition process, larger clusters of AuNPs grew by coalescence and aggregation. The prepared layers were characterised optically with Ultraviolet–visible spectroscopy (UV–vis) and ellipsometry. The ellipsometric measurements showed an increasingly denser and thicker effective thickness of the AuNP layers. The extinction spectra displayed a clear local surface plasmonic resonance (LSPR) signature (peak 520–540 nm), indicating the presence of isolated particles in all the samples. For all AuNP layers, the imaginary part of the parallel and perpendicular components of the anisotropic dielectric function was dominated by a central peak at around 2.2 eV, corresponding to the LSPR of isolated particles, and a high-energy shoulder due to Au interband transitions. It was shown that, as the density of particles increased, the extinction cross-section grew over the whole spectral range where measurements are taken. Thus, the response can be explained with an enhanced electromagnetic response between the AuNPs that can be connected to the increase in particle density, but also by the formation of clusters and irregular structures. Ključne besede: optical characteristics, gold nanoparticles’ films, UV–vis, ellipsometry measurements Objavljeno v DKUM: 28.05.2024; Ogledov: 124; Prenosov: 0 |
5. Environmental attitudes among youth : how much do the educational characteristics of parents and young people matter?Andrej Kirbiš, 2023, izvirni znanstveni članek Opis: Research shows that education increases environmental attitudes, yet there is a lack of studies examining young people’s attitudes and the role of various educational characteristics in youth’s environmental engagement. The main aim of our study was to examine how several educational characteristics of young people and their parents impact youth’s environmental attitudes. We employed a survey sample of 14–34-year-olds (N = 1508; Mage = 19.25 years) collected in January 2020. The impact of five educational variables was tested: maternal and paternal educational level; students’ educational stage (primary, secondary and tertiary school students); educational track of secondary students (vocational, professional and general); and youth’s educational status (currently in education vs. not in education). We controlled for several demographic and economic confounding factors in multivariate analyses. These indicate significant between-track differences in environmental attitudes among secondary school students, while educational status and educational stage have no significant impact on environmental attitudes. In addition, the father’s (but not the mother’s) education increases Slovenian youngsters’ environmental attitudes. As findings indicate significant differences between educational tracks of secondary students independent of their parental education and other personal and family characteristics, educators may want to revise vocational and professional secondary school syllabuses to include an increased number of environmental, climate change and sustainability topics. Ključne besede: environmental attitudes, educational characteristics, school track, parental education, young people Objavljeno v DKUM: 16.02.2024; Ogledov: 397; Prenosov: 19 Celotno besedilo (753,73 KB) Gradivo ima več datotek! Več... |
6. Assessment of the operating characteristics of brushless dc motorsVasilija Sarac, Neven Trajchevski, Roman Golubovski, 2019, izvirni znanstveni članek Opis: This paper presents the operating characteristics of brushless DC motors (BLDC) obtained via analytical, numerical, and simulation software, enabling steady-state and transient characteristics of a motor to be computed. Based on the catalogue data from the producer, Moog, a motor is simulated in a closed-loop control system fed by a voltage inverter. The accuracy of the derived models is verified by comparison with data from the producer. The developed analytical and simulation models enable the studying of various motor operating modes, such as no-load, rated load, and locked rotor, including motor starting characteristics. They are universal and can be easily applied to any brushless DC motor by simple replacement of the motor parameters. A numerical model in FEM software verifies the accuracy of previously derived models by obtaining the motor operating characteristics and the magnetic flux density distribution in a cross-section of the motor. The results obtained from all models have verified the proper design of the motor and laid out the path for further improvement with respect to the various motor parameters or operating characteristics. Ključne besede: brushless DC motor, FEM model, transient characteristics Objavljeno v DKUM: 22.12.2023; Ogledov: 593; Prenosov: 6 Celotno besedilo (663,25 KB) Gradivo ima več datotek! Več... |
7. Sprache und Stil im Werk von Alma M. Karlin2023, znanstvena monografija Opis: Alma Maksimiliana Karlin (1889–1950) was born in Celje 130 years ago. Since the mid 1920s, she was considered an important world traveler and by the end of World War II Alma Karlin became a very popular and notable German writing author. The volume provides research findings on the linguistic and stylistic aspects as well as some others specific features of Karlin’s literary heritage. The papers are classified according to theoretical, methodological and empirical background and devided into three sections. The contributions in the first part discuss the possibilities of different ap-proaches to studing literary and aesthetic characteristics in Karlin’s select-ed works. Dejan Kos (Maribor) illustrates how Alma M. Karlin’s texts are characterized by an empathetic tendency to transcend the boundaries of her own world through aesthetics and spirituality. The discussion by Sylvia Brä-sel (Erfurt) shows that Karlin does not merely convey knowledge about the world and reflects on entertaining, foreign, and exotic, but also systematically re-presents herself. Alenka Jensterle-Doležal (Prague) describes the ways in which women’s roles and identities are constructed in the novel Svetlikanje v mraku. The analysis of style and language reveals that the author critically asseses woman’s life in a patriarchal society, while advocating racist judgments and prejudices of the time. The article by Melania Larisa Fabčič (Maribor) focuses on Karlin’s autobiography and her style, which is primarily constructed through reflection of emotions, recognized by the reader even when the text does not explicitly demonstrate them. The texts in the second part focus on different approaches of Alma M. Karlin’s textual style. Vida Jesenšek (Maribor) transparently presents the complexity of the author’s style. By implying linguistic, pragmatic and cognitive aspects, the research identifies the connections and mutual correlations between general principles of text’s structure, specific stylistic »meanings« and substantive textual aspects. Inge Pohl (Schwieberdingen) presents the first comprehensive linguistic analysis of the novel Windlichter des Todes, focusing on the archi-tectonic, structure and composition of literary characters and highlightening the function of the narrative perspective and the narrative structure. One of the most outstanding feautres of Alma M. Karlin’s literary texts is conveing emotions. In her research, Hana Bergerová (Ústí nad Labem) demonstrates that Karlin’s describes emotions in different, explicit and implicit, ways. The papers in the third part examine the creative use of language in Alma M. Karlin’s selected works. The reader notices linguistic creativity when rec-ognizing those linguistic meanings or devices in a text which seem unusual, unexpected, or deviating from expected. Urška Valenčič Arh (Ljubljana) studies the use of phraseological expressions in Der blaue Mond’s and compares the original to the Slovene translation. Alja Lipavic Oštir (Maribor) resarches travel texts with a particular emphasis on geographical names. Simona Štavbar (Ma-ribor) proceeds from the assumption that Karlin’s geobiographical texts contain evaluating statements which reinforce social prejudices. It is not surprising, therefore, that there are numerous euphemisms and dysphisms which Karlin uses to »indirectly« denote things, people, and events, concealing or empha-sizing certain judgments. Karlin’s creativity is also reflected in the effective use of word-formations. Inge Pohl (Schwieberdingen) studies neologisms in the novel Windlichter des Todes and describes the word-forming patterns used by Karlin to attract readers’ attention but which also demonstrate her exceptional knowledge of German. The volume offers a scholarly insight into a number of previously unexplored topics related to language and style of Alma M. Karlin’s literary works and outlines possibilities for further researches. Ključne besede: Alma M. Karlin, language, style, literary and aesthetic characteristics, selected works Objavljeno v DKUM: 21.12.2023; Ogledov: 441; Prenosov: 13 Celotno besedilo (20,04 MB) Gradivo ima več datotek! Več... |
8. Comparative analysis of synchronous motorsVasilija Sarac, Goce Stefanov, Dragan Minovski, 2021, izvirni znanstveni članek Opis: This paper compares the parameters, steady-state and transient characteristics of two different types of synchronous motors (SM) – a motor with surface mounted magnets on the rotor, and a motor with embedded magnets and squirrel cage winding, widely known as a line-start synchronous motor. The comparison is based on results obtained from analytical, numerical and transient models of both motors for the same output power of the motors. The models for obtaining transient characteristics allow comparison of acceleration of both motors taking into consideration that the line-start SM is a self-starting motor while the SM with surface magnets is always started with the aid of a PWM inverter. The results obtained from the analytical, numerical and transient models of the motors should assist in choosing the most cost-effective solution in terms of the type of the motor for the appropriate application. Ključne besede: FEM models, synchronous motors, steady-state characteristics, transient characteristics Objavljeno v DKUM: 13.11.2023; Ogledov: 420; Prenosov: 4 Celotno besedilo (727,90 KB) Gradivo ima več datotek! Več... |
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10. Prediction of California Bearing Ratio (CBR) and Compaction Characteristics of granular soilAttique ul Rehman, Khalid Farooq, Hassan Mujtaba, 2017, izvirni znanstveni članek Opis: This research is an effort to correlate the index properties of granular soils with the California Bearing Ratio (CBR) and the compaction characteristics. Soil classification, modified proctor and CBR tests conforming to the relevant ASTM methods were performed on natural as well as composite sand samples. The laboratory test results indicated that samples used in this research lie in SW, SP and SP-SM categories based on Unified Soil Classification System and in groups A-1-b and A-3 based on the AASHTO classification system. Multiple linear regression analysis was performed on experimental data and correlations were developed to predict the CBR, maximum dry density (MDD) and optimum moisture content (OMC) in terms of the index properties of the samples. Among the various parameters, the coefficient of uniformity (Cu), the grain size corresponding to 30% passing (D30) and the mean grain size (D50) were found to be the most effective predictors. The proposed prediction models were duly validated using an independent dataset of CBR tests on sandy soils. The comparative results showed that the variation between the experimental and predicted results for CBR falls within ±4% confidence interval and that of the maximum dry density and the optimum moisture content are within ±2%. Based on the correlations developed for CBR, MDD and OMC, predictive curves are proposed for a quick estimation based on Cu , D30 and D50. The proposed models and the predictive curves for the estimation of the CBR value and the compaction characteristics would be very useful in geotechnical & pavement engineering without performing the laboratory compaction and CBR tests. Ključne besede: CBR, regression, model, prediction, compaction characteristics Objavljeno v DKUM: 18.06.2018; Ogledov: 1439; Prenosov: 224 Celotno besedilo (830,76 KB) Gradivo ima več datotek! Več... |