Johannes Kepler University of Linz

About: Johannes Kepler University of Linz is a education organization based out in Linz, Oberösterreich, Austria. It is known for research contribution in the topics: Computer science & Thin film. The organization has 6605 authors who have published 19243 publications receiving 385667 citations.

Twenty-Five Years of Social Media: A Review of Social Media Applications and Definitions from 1994 to 2019

Abstract: In this article, the authors present the results from a structured review of the literature, identifying and analyzing the most quoted and dominant definitions of social media (SM) and alternative ...

Polyphosphazenes: Multifunctional, Biodegradable Vehicles for Drug and Gene Delivery.

Abstract: Poly[(organo)phosphazenes] are a unique class of extremely versatile polymers with a range of applications including tissue engineering and drug delivery, as hydrogels, shape memory polymers and as stimuli responsive materials. This review aims to divulge the basic principles of designing polyphosphazenes for drug and gene delivery and portray the huge potential of these extremely versatile materials for such applications. Polyphosphazenes offer a number of distinct advantages as carriers for bioconjugates; alongside their completely degradable backbone, to non-toxic degradation products, they possess an inherently and uniquely high functionality and, thanks to recent advances in their polymer chemistry, can be prepared with controlled molecular weights and narrow polydispersities, as well as self-assembled supra-molecular structures. Importantly, the rate of degradation/hydrolysis of the polymers can be carefully tuned to suit the desired application. In this review we detail the recent developments in the chemistry of polyphosphazenes, relevant to drug and gene delivery and describe recent investigations into their application in this field.

Risk aversion in family firms: what do we really know?

Abstract: Purpose – Risk aversion is an important characteristic associated with family firms. Despite growing literature in recent years, a consistent picture of what we know about the risk aversion of family firms has not evolved. Thus, this paper presents a systematic overview of whether family firms are found to be more risk averse than non‐family firms, the factors influencing the risk aversion of family firms and the outcomes of risk aversion.Design/methodology/approach – This paper follows the tenets of Tranfield et al. for conducting a systematic literature review. Following a keyword search and an assessment of fit for this review, 29 papers were analyzed with respect to bibliographical information, research design and findings.Findings – Most studies find that family firms are indeed more risk‐averse than non‐family firms. However, some findings advance the notion that this phenomenon strongly depends on the situation of the family firm and that the controlling family may take irrational risks to secure c...

On the stability of Poiseuille flow of a Bingham fluid

Abstract: The stability to linearized two-dimensional disturbances of plane Poiseuille flow of a Bingham fluid is considered. Bingham fluids exhibit a yield stress in addition to a plastic viscosity and this description is typically applied to drilling muds. A non-zero yield stress results in an additional parameter, a Bingham number, and it is found that the minimum Reynolds number for linear instability increases almost linearly with increasing Bingham number.