University of Ljubljana

About: University of Ljubljana is a education organization based out in Ljubljana, Slovenia. It is known for research contribution in the topics: Population & Liquid crystal. The organization has 17210 authors who have published 47013 publications receiving 1082684 citations. The organization is also known as: Univerza v Ljubljani.

Corporate entrepreneurship contingencies and organizational wealth creation

Abstract: Despite the recognized importance of entrepreneurship for organizational wealth creation, research has devoted minimal attention to investigating this area. This study contributes to a better understanding of the relationship between corporate entrepreneurship and wealth creation by developing and testing a normative model, which clarifies the nature of the influences of corporate entrepreneurship and its environmental and organizational antecedents on organizational performance. The findings of structural equation modeling, based on mail survey data from 477 Slovenian firms, demonstrate that corporate entrepreneurship and some its contingencies make a difference in organizational wealth creation, growth and profitability.

Substructure revealed by RR Lyraes in SDSS Stripe 82

Abstract: We present an analysis of the substructure revealed by RR Lyraes in Sloan Digital Sky Survey Stripe 82, which covers 2°5 in declination on the celestial equator over the right ascension range α = 20 h 7 to 3 h 3 We use the new public archive of light-motion curves in Stripe 82, published by Bramich et al in 2008, to identify a set of high-quality RR Lyrae candidates Period estimates are determined to high accuracy using a string-length method A subset of 178 RR Lyraes with spectrally derived metallicities are employed to derive metallicity-period-amplitude relations, which are then used, together with archive magnitude data and light-curve Fourier decomposition, to estimate metallicities and hence distances for the entire sample The RR Lyraes lie 5-115 kpc from the Galactic Centre, with distance estimates accurate to ∼8 per cent The RR Lyraes are further divided into subsets of 316 RRab types and 91 RRc types based on their period, colour and metallicity We fit a smooth density law to the distribution as a simple representation of the data For Galactocentric radii 5-25 kpc the number density of RR Lyraes falls as r ―2,4 , but beyond 25 kpc, the number density falls much more steeply, as r ―45 However, we stress that in practice the density distribution is not smooth, but dominated by clumps and substructure Samples of 55 and 237 RR Lyraes associated with the Sagittarius Stream and the Hercules-Aquila Cloud, respectively, are identified Hence, ∼70 per cent of the RR Lyraes in Stripe 82 belong to known substructure, and the sharp break in the density law reflects the fact that the dominant substructure in Stripe 82 - the Hercules-Aquila Cloud and the Sagittarius Stream -lie within 40 kpc In fact, almost 60 per cent of all the RR Lyraes in Stripe 82 are associated with the Hercules-Aquila Cloud alone, which emphasizes the cloud's pre-eminence Additionally, evidence of a new and distant substructure - the Pisces Overdensity ― is found, consisting of 28 faint RRLyraes centred on Galactic coordinates (l ≈ 80°, b ≈ -55°), with distances of ∼80 kpc The total stellar mass in the Pisces Overdensity is ∼10 4 M ⊙ and its metallicity is [Fe/H]∼ ―15

The Importance of Interphase Contacts in Li Ion Electrodes: The Meaning of the High-Frequency Impedance Arc

Abstract: Li insertion electrodes are made by pressing a mixture of active material and additives on a metallic substrate. Here we estimate how various interphase contacts affect the electrode kinetics. We apply variable external mechanical pressure onto different cathodes and measure their impedance response. Similar experiments are performed on dry composites in contact with: Al or Cu foil, or Ag paste. Most surprisingly, we find that the high-frequency impedance arc is due to the contact impedance between the metal and the electrode material. This is in fundamental contradiction with previous interpretations. We propose an equivalent circuit explaining the observed phenomena.

Cryogenic manufacturing processes

Abstract: Cryogenically assisted manufacturing processes are emerging as environmentally-benign, toxic-free, hazardless operations, producing functionally superior products. This paper presents an overview of major cryogenic manufacturing processes, summarizing the state-of-the-art and significant developments during the last few decades. It begins with a summary of historic perspectives, including definitions, scope, and proceeds to analysis of process mechanics and material performance covering tribological and thermo-mechanical interactions, followed by surface integrity, product quality and performance in cryogenic manufacturing. Process analysis and applications includes machining, forming and grinding. Economic, safety and health issues are then discussed. Finally, progress in developing predictive performance models and future outlook are presented.