1. Antioxidant activity of elderberry fruits during maturationNataša Imenšek, Janja Kristl, Tadeja Kraner Šumenjak, Anton Ivančič, 2021, izvirni znanstveni članek Opis: Antioxidant activity (AOA) in fruits of Sambucus nigra and several new elderberry interspecific hybrids involving S. javanica (JA), S. nigra subsp. nigra (NI), S. nigra subsp. nigra ‘Black Beauty’ (BB), S. nigra subsp. cerulea (CER) and S. racemosa (S. racemosa subsp. racemosa (RAC), S. racemosa subsp. racemosa var. miquelii (MIQ), S. racemosa subsp. tigranii (TIG), S. racemosa subsp. kamtschatica—coreana (KOR) at five maturity stages were investigated by applying DPPH (2,2-diphenyl-1-picrylhydrazyl), ABTS (2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid)), FRAP (ferric reducing antioxidant power) and ORAC (oxygen radical absorption capacity) assays. The aim of the study was to compare different assays for estimating AOA in elderberries, to plan the appropriate harvest time and to determine whether the most promising genotypes could be predicted in advance. All assays used showed that AOA increased significantly during maturation. All assays were significantly correlated with each other and could be reliably used for the AOA determination of elderberries. In fully mature berries, significant correlations were also found between total phenolic (TP) content and AOA by all assays, but no significant correlations were found between total ascorbic acid (TAA) content and AOA by all assays. At the fully mature stage, (the most appropriate stage for harvesting), berries of (JA × NI) × BB and (JA × NI) × MIQ were found to be superior in AOA and TP content. Genotypes with higher/lower AOA and TP content could not be predicted in advance, while TAA showed the opposite.
Ključne besede: Sambucus, interspecific hybrids, maturation, ABTS, DPPH, ORAC, FRAP, total phenolic content, ascorbic acid, correlations
Objavljeno v DKUM: 20.08.2024; Ogledov: 80; Prenosov: 10
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2. Advancements in data analysis for the work-sampling methodBorut Buchmeister, Nataša Vujica-Herzog, 2024, izvirni znanstveni članek Opis: The work-sampling method makes it possible to gain valuable insights into what is happening in production systems. Work sampling is a process used to estimate the proportion of shift time that workers (or machines) spend on different activities (within productive work or losses). It is estimated based on enough random observations of activities over a selected period. When workplace operations do not have short cycle times or high repetition rates, the use of such a statistical technique is necessary because the labor sampling data can provide information that can be used to set standards. The work-sampling procedure is well standardized, but additional contributions are possible when evaluating the observations. In this paper, we present our contribution to improving the decision-making process based on work-sampling data. We introduce a correlation comparison of the measured hourly shares of all activities in pairs to check whether there are mutual connections or to uncover hidden connections between activities. The results allow for easier decision-making (conclusions) regarding the influence of the selected activities on the triggering of the others. With the additional calculation method, we can uncover behavioral patterns that would have been overlooked with the basic method. This leads to improved efficiency and productivity of the production system.
Ključne besede: work sampling, observations, analysis, proportions, correlations, interdependence between activities
Objavljeno v DKUM: 09.05.2024; Ogledov: 204; Prenosov: 19
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3. Empirical correlation between the shear-wave velocity and the dynamic probing heavy test : case study, Varaždin, CroatiaStjepan Strelec, Davor Stanko, Mario Gazdek, 2016, izvirni znanstveni članek Opis: Varaždin is located in the north-western part of Croatia in shallow quaternary alluvial sediments of the Drava River basin. Local site effects due to the alluvial soft sediments can play a crucial role in the amplification of seismic-wave ground motions. The shear-wave velocity (VS) is one of the most important parameters for determining dynamic soil properties and ground-response analyses.
The seismic surface wave method (MASW) is the simplest and a very efficient way of measuring the shear-wave velocity in the field. The Dynamic Probing Heavy (DPH) test is suited to determining the soil strength and the soil deformation properties. However, there are a lack of correlations between the shear-wave velocity and the DPH tests (VS - NDPH) in the literature. In this paper we present empirical correlations between the shear-wave velocity VS and the soil penetration resistance NDPH with: a) raw (original) NDPH data: VS = 97.839·NDPH0.395, (R2 = 0.723); b) a groundwater correction NDPH data: VS = 92.998·NDPH0.363 (R2 = 0.815). From the measured DPH data, the shear-wave velocity (VS), the shear modulus (Go) and the Young’s modulus (Eo and Er) were estimated. Two different approaches (low vs. high strain) were compared, and the results were found to be in good agreement when the relative difference between the velocities is small and smooth.
Dynamic probing tests are good for studying a discrete point of interest in a large field area based on preliminary seismic tests. The suggested correlation VS - NDPH can be used for a rough estimation of VS from NDPH (they are site-specific, and so not applicable worldwide). In this way valuable information about dynamic soil properties can be extracted for ground-response analyses and the study of local site effects.
Ključne besede: shear-wave velocity, MASW, DPH, empirical correlations, dynamic elastic moduli, dynamic soil properties
Objavljeno v DKUM: 15.06.2018; Ogledov: 1850; Prenosov: 91
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4. The recreational correlations of urbanisation process in HungaryAntal Aubert, Veronika Hegedüs, 2006, izvirni znanstveni članek Opis: The settlement network of Hungary has reached a development phase by now where not only concentration processes but also disurbanisation phenomena can be seen. This has led to the birth or urban spaces of different types, in which spaces the functions satisfying the recreational needs of the local society are becoming more and more important. Recreation, in addition to “tourism” in the classic sense of the word, is a process meeting the demands of the local population and affecting the image and the identity of the settlement, which is available for most of the people up to the level of their leisure time. (Recreation as a possibility to spend leisure time can be interpreted in a wider context that also involves tourism, but in this paper the narrower interpretation is considered as valid.) Beyond the former, mainly touristic division of the space, the paper places the recreation- related phenomena and spaces within the system of urbanisation processes; also, the by the examination of the demand and supply side it justifies the importance of the research. Following the introduction of the theoretical background, the paper focuses – through a case study – on the development of the settlement network around Kaposvár and the recreation possibilities and spaces of the respective area.
Ključne besede: urbanisation, recreational correlations, Kaposvár
Objavljeno v DKUM: 02.03.2018; Ogledov: 1355; Prenosov: 102
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5. Collective sensing of ß-cells generates the metabolic codeDean Korošak, Marjan Rupnik, 2018, izvirni znanstveni članek Ključne besede: collective sensing, pancreatic islets, spin glass models, metabolic code, Ca2+ imaging, Ca2+ signaling, correlations, intercellular communication
Objavljeno v DKUM: 25.01.2018; Ogledov: 1646; Prenosov: 129
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6. Statistics for economics, accounting and business studiesMichael Barrow, 2001, učbenik za višje in visoke šole Ključne besede: economics, economy, statistical methods, statistics, computer science, computer application, software, computer programmes, data base, index numbers, indexes, probability, realibility, distributions, hypotheses testing, data, sampling, regression analysis, correlations, time series, mistakes, problem solving, solution of problems, statistical analysis, application, business process, accounting, cases, case study, textbooks, exercises
Objavljeno v DKUM: 01.06.2012; Ogledov: 3006; Prenosov: 59
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7. Contemporary business statistics with Microsoft Excel : (Microsoft Excel 2000 and Excel 97)David Ray Anderson, Dennis J. Sweeney, Thomas Arthur WilliamsKljučne besede: economics, economy, business operation, business operation of the enterprise, statistical methods, statistics, computer science, computer application, software, computer programmes, Excel, CD-ROM, compact disc, computer diskette, Internet, computer networks, data base, probability, realibility, distributions, hypotheses testing, data, sampling, regression analysis, correlations, time series, mistakes, problem solving, solution of problems, statistical analysis, application, business process, accounting, cas
Objavljeno v DKUM: 01.06.2012; Ogledov: 2975; Prenosov: 35
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8. Contemporary business statistics with Microsoft ExcelDavid Ray Anderson, Dennis J. Sweeney, Thomas Arthur Williams, učbenik za višje in visoke šole Ključne besede: economics, economy, business operation, business operation of the enterprise, statistical methods, statistics, computer science, computer application, software, computer programmes, Excel, Internet, computer networks, data base, probability, realibility, distributions, hypotheses testing, data, sampling, regression analysis, correlations, time series, mistakes, problem solving, solution of problems, statistical analysis, application, business process, accounting, cases, case study, textbooks, exercises
Objavljeno v DKUM: 01.06.2012; Ogledov: 3097; Prenosov: 38
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