Bernhard Meindl's research while affiliated with IST Austria and other places

... Another simple encoding employs grids to encode, for instance, a sequence of states in colored cells in one or multiple rows ( 21 / 140 ). However, there also exist approaches demonstrating that word-sized graphics are not limited to these simple diagram types, for instance, graphics that encode spatial trajectories or densities [55], [56], [57], stacked quantities that form streams [58], small representations of boxplots to display statistical distributions [59], [60], [61], or glyphs that encode multivariate properties [9], [40]. Even parallel coordinates can be represented [42], and networks in simplified node-link representations [55], [62] or adjacency matrices [55]. ...

... For example, [28] and [29] use imputation processes to decompose the multidimensional joint distribution into conditional univariate distributions. [30] and [31] use parametric models in combination with conditional re-sampling to synthesize hierarchical relationships. ...

... However, at the prediction step, gaussian noise with mean = 1.2% and SD = 3,9% (minimum = 0.0% and maximum = 130.9%) was randomly added to the simulated C1 and C2 sampling times, using the sdcMicro R package. 18 The aim was to introduce uncertainty on input data so as to observe the algorithm prediction performance in more realistic conditions. In addition, we kept the interindividual variability of the PK parameters described in the initial study (eta values), as well as that brought by the most important covariate, the ideal body weight. ...

... Especially in smaller studies, budget and personnel constraints are limiting parameters. Basic statistics and descriptive plots enable researchers to identify quality problems through visualization of main characteristics as well as relationships and, therefore, facilitate monitoring and reporting quality of research data [6]. ...

... There are open -source software libraries available such as COIN -OR, GLPK and lp_solve. A comparison of the performance (speed and instances) of optimization engines was undertaken by [50]. Gearhart et al. [51] evaluate open-source linear programming solvers. ...

... Im Folgenden wird beispielhaft das Einkommensquintilverhältnis (quintile share ratio) und die Armutsrisikoquote (at-risk-of poverty rate) definiert. Weitere Definitionen der Laeken-Indikatoren, so wie sie im AMELI-Projekt verwendet wurden, sind bei Graf et al. (2011a) zu finden. ...

... Various anonymization software tools have been made available in the past. One of the most feature-rich is sdcMicro [1,2], an R package for data anonymization optimized for large datasets. For users comfortable with using R, this package provides a tool for the application of a comprehensive suite of methods commonly used and described in literature on disclosure control. ...

... Users can choose from a total of eight non-cluster-based and four cluster-based methods. The grouping can also be can be nonrobust (for example, the default algorithm Maximum Distance to Average Vector (MDAV) [3]) or robust such as the Robust Maximum Distance (RMD) algorithm [19]. ...

... Examples of such outliers might be enterprises with very high values for turnover or persons with extremely high income. Also, multivariate outliers exist (see Templ and Meindl 2008a). Unfortunately, intruders may want to disclose a large enterprise or an enterprise with specific characteristics. ...

... Additionally, even Lagrangian Relaxation (LR) based algorithms, often employed to exploit the master problem separability into several sub-problems, suffer from a slowly overall convergence that might negatively affect the optimization process (Bragin et al. 2019). Hence, although the mathematical programming related literature reports the execution times for specific algorithms and problem instances (Meindl and Templ 2013), it is difficult to establish the required time given only a MILP problem's generic formulation (IBM 2018). For instance, S. Lehmann et al. have investigated an RPO problem related to wind farm planning with multiple cable types (Lehmann 2017), while J. C. S. N. Pinheiro et al. have investigated an RPO problem related to parallel machine scheduling (Pinheiro et al. 2020), in which each machine has a certain amount of resources to process a job. ...