Iskanje po katalogu digitalne knjižnice

Opis: Increasing the efficiency of risk assessment for the purposes of personal insurance is impossible without using the latest achievements of modern science. This translates into a growing interest in the use of genetic research results by insurers, which manifests itself not only in legislation and insurers' practices, but also in international recommendations on personal medical data processing for insurance purposes. Based on analysis of foreign practices, the authors determine priority areas of respective legislation development, in particular, legislative recognition of a ban on insurers' access to genetic data in the context of obligatory medical insurance and group insurance programs; granting insurers the right to use genetic testing results for the purposes of life insurance, personal accident and sickness insurance, voluntary medical insurance, if the sum insured exceeds a statutory threshold.
Ključne besede: personal insurance, genetic testing, epigenetic changes, legislation, diagnostic tests, prognostic tests
Objavljeno: 15.01.2021; Ogledov: 67; Prenosov: 6
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Opis: This paper presents measurements, and an interpretation of these measurements, based on the use of bender-element probes for Boštanj silty sand. The samples were prepared at different initial void ratios and isotropically compressed up to 5 MPa. The bender-element technique was used to determine the dynamic shear modulus ($G_0$) of the soils at very small strains. The multiple bender-element probes were shot at different excitation frequencies in order to increase the reliability of the measurements. The $G_0$ stiffness was determined by using three different techniques: a) the first-time arrival, b) the phase-change method and c) the cross-correlation method. The systematic differences observed between the $G_0$ values, calculated using the three techniques, are discussed. The variation of $G_0$ in the log$G_0$ - log$p'$ plane was evaluated for the Boštanj silty sand and compared with other sands.
Ključne besede: silty sand, triaxial testing, small strain stiffness, bender elements, time-domain and frequency-domain, measurements
Objavljeno: 06.06.2018; Ogledov: 514; Prenosov: 38
Celotno besedilo (706,26 KB)
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Opis: This article focusses on mineralogical and physical characteristics of snail soil and their influence on parameter values of geomechanical characteristics.Snail soil, which got its name from fossil remains, is a typical layer observed in the Ljubljana marsh. It is distincltly porous, saturated and in a liquid consistency state. Snail soil was investigated for mineralogical and physical characteristics in the Laboratory of Soil Mechanics, Faculty of Civil Engineering of the University in Maribor. Mineral and chemical composition, visual appearance, specific surface and grain property were determined. Physical characyteristics show that snail soil is saturated in nature, highly porous and almost liquid. Geomechanical characteristics were investigated for their interdependency on physical characteristics. A series of triaxial tests were performed on snail soil samples of different porosity, density and water content. Cylindrical samples of the height of 100 mm and the diameter of 50 mm were tested using three-axial testing apparatus. The results of the tests show that interdependency exists between geomechanical characteristics and porosity. These relationships can be expressed as functions of density, porosity or water content. It is evident from the results that changes of the coefficient of permeability, the coefficient of consolidation, and the coefficient of volume compressibility are nonlinear with respect to changes in porosity. Changes of mechanical parameters, such as Young`s modulus, Poisson`s ratio andfriction angle are indistinct and almost linear at lower changes of porosity.
Ključne besede: geomechanics, properties of soils, snail soil, triaxial testing, porosity, permeability, consolidation, Young`s modulus, Poisson`s ratio, shear angle
Objavljeno: 17.05.2018; Ogledov: 661; Prenosov: 40
Celotno besedilo (486,06 KB)
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Opis: The thesis describes the development of the test environment for Ultra High Frequency receivers. The proposed test environment replaces the universal, expensive and professional measurement equipment with dedicated computer controlled integrated circuits. For radio frequency modules` testing, all functionalities from the previous test environment are supported, e.g. existing tests, used modulation and coding techniques, as well as the communication package and interference control. The proposed test environment additionally supports more coding techniques and more use cases. While developing, we tended to small dimensions, low price, specifications, functionality and reliability. At first, the previous test environment is presented, as well as its shortcomings and the specifications for the proposed test environment. Further presented are the basic theory and test methods. At the end, we introduce the proposed test environment, its development and operations.
Ključne besede: testing environment, ultra-high frequency, modulation, radio frequency systems
Objavljeno: 15.03.2018; Ogledov: 894; Prenosov: 143
Celotno besedilo (4,84 MB)

Opis: Običajna hidravlična olja na mineralni osnovi in turbinska olja, katera se uporabljajo na strojih in napravah imajo različno dolgo uporabno dobo. Ta je odvisna od vrste različnih faktorjev: od pravilnega vzdrževanja in uporabljen vrste nadzora in aktivnosti in od skrbne izbire vrste olja. Mehanizmi staranja hidravličnih olj in pa vzroki, zakaj jih je potrebno zamenjati so sicer zelo dobro znani uporabnikom, manj poznano pa je dejstvo, da so med posameznimi vrstami olj velike razlike glede njihove vzdržljivosti, ko so le ta izpostavljena delovnim pogojem stroja. Vsako podaljšanje uporabne dobe hidravličnega ali turbinskega olja ponuja tako finančne kot okoljske prednosti, a predpostavlja poznavanje dejanskega stanja olja. Za namene ocene preostale uporabne dobe olja, je v prispevku predstavljena nova metoda za primerna za on-line nadzor stanja in za testiranje vzdržljivosti oz. oksidacijske odpornosti različnih hidravličnih olj. Rezultati takšnega testiranja uporabniku nudijo možnost strateškega odločanja pri postopku nabave najprimernejšega olja z dolgo uporabno dobo.
Ključne besede: hydraulic oil, aging, on-line monitoring, testing, strategical decision-making
Objavljeno: 10.10.2017; Ogledov: 571; Prenosov: 43
Celotno besedilo (732,34 KB)