@article{GhahremaniGiese2020, author = {Ghahremani, Sona and Giese, Holger}, title = {Evaluation of self-healing systems}, series = {Computers}, volume = {9}, journal = {Computers}, number = {1}, publisher = {MDPI}, address = {Basel}, issn = {2073-431X}, doi = {10.3390/computers9010016}, pages = {32}, year = {2020}, abstract = {Evaluating the performance of self-adaptive systems is challenging due to their interactions with often highly dynamic environments. In the specific case of self-healing systems, the performance evaluations of self-healing approaches and their parameter tuning rely on the considered characteristics of failure occurrences and the resulting interactions with the self-healing actions. In this paper, we first study the state-of-the-art for evaluating the performances of self-healing systems by means of a systematic literature review. We provide a classification of different input types for such systems and analyse the limitations of each input type. A main finding is that the employed inputs are often not sophisticated regarding the considered characteristics for failure occurrences. To further study the impact of the identified limitations, we present experiments demonstrating that wrong assumptions regarding the characteristics of the failure occurrences can result in large performance prediction errors, disadvantageous design-time decisions concerning the selection of alternative self-healing approaches, and disadvantageous deployment-time decisions concerning parameter tuning. Furthermore, the experiments indicate that employing multiple alternative input characteristics can help with reducing the risk of premature disadvantageous design-time decisions.}, language = {en} } @article{WrightWachsHuang2020, author = {Wright, Michelle F. and Wachs, Sebastian and Huang, Zheng}, title = {Adolescents' Popularity-Motivated Aggression and Prosocial Behaviors: The Roles of Callous-Unemotional Traits and Social Status Insecurity}, series = {Frontiers in Psychology}, journal = {Frontiers in Psychology}, publisher = {Frontiers}, address = {Lausanne, Schweiz}, issn = {1664-1078}, doi = {10.3389/fpsyg.2021.606865}, pages = {1 -- 8}, year = {2020}, abstract = {As competition over peer status becomes intense during adolescence, some adolescents develop insecure feelings regarding their social standing among their peers (i.e., social status insecurity). These adolescents sometimes use aggression to defend or promote their status. The aim of this study was to examine the relationships among social status insecurity, callous-unemotional (CU) traits, and popularity-motivated aggression and prosocial behaviors among adolescents, while controlling for gender. Another purpose was to examine the potential moderating role of CU traits in these relationships. Participants were 1,047 (49.2\% girls; Mage = 12.44 years; age range from 11 to 14 years) in the 7th or 8th grades from a large Midwestern city. They completed questionnaires on social status insecurity, CU traits, and popularity-motivated relational aggression, physical aggression, cyberaggression, and prosocial behaviors. A structural regression model was conducted, with gender as a covariate. The model had adequate fit. Social status insecurity was associated positively with callousness, unemotional, and popularity-motivated aggression and related negatively to popularity-motivated prosocial behaviors. High social status insecurity was related to greater popularity-motivated aggression when adolescents had high callousness traits. The findings have implications for understanding the individual characteristics associated with social status insecurity.}, language = {en} } @article{ScherlerSchwanghart2020, author = {Scherler, Dirk and Schwanghart, Wolfgang}, title = {Drainage divide networks}, series = {Earth surface dynamics : ESURF}, volume = {8}, journal = {Earth surface dynamics : ESURF}, number = {2}, publisher = {Copernicus Publ.}, address = {G{\"o}ttingen}, issn = {2196-6311}, doi = {10.5194/esurf-8-245-2020}, pages = {245 -- 259}, year = {2020}, abstract = {We propose a novel way to measure and analyze networks of drainage divides from digital elevation models. We developed an algorithm that extracts drainage divides based on the drainage basin boundaries defined by a stream network. In contrast to streams, there is no straightforward approach to order and classify divides, although it is intuitive that some divides are more important than others. A meaningful way of ordering divides is the average distance one would have to travel down on either side of a divide to reach a common stream location. However, because measuring these distances is computationally expensive and prone to edge effects, we instead sort divide segments based on their tree-like network structure, starting from endpoints at river confluences. The sorted nature of the network allows for assigning distances to points along the divides, which can be shown to scale with the average distance downslope to the common stream location. Furthermore, because divide segments tend to have characteristic lengths, an ordering scheme in which divide orders increase by 1 at junctions mimics these distances. We applied our new algorithm to the Big Tujunga catchment in the San Gabriel Mountains of southern California and studied the morphology of the drainage divide network. Our results show that topographic metrics, like the downstream flow distance to a stream and hillslope relief, attain characteristic values that depend on the drainage area threshold used to derive the stream network. Portions along the divide network that have lower than average relief or are closer than average to streams are often distinctly asymmetric in shape, suggesting that these divides are unstable. Our new and automated approach thus helps to objectively extract and analyze divide networks from digital elevation models.}, language = {en} } @article{MeyerRichterRichteretal.2020, author = {Meyer, Andr{\´e} and Richter, Eric and Richter, Dirk and Gronostaj, Anna}, title = {Professionalisierung von Schulleitungen am Beispiel der Werkstatt „Schule leiten"}, series = {Die deutsche Schule}, volume = {112}, journal = {Die deutsche Schule}, number = {3}, publisher = {Waxmann}, address = {M{\"u}nster}, issn = {0012-0731}, doi = {10.31244/dds.2020.03.03}, pages = {277 -- 295}, year = {2020}, abstract = {Empirische Studien und schulische Rechtsvorschriften betonen die Relevanz von Schulleiter*innen f{\"u}r die Schulentwicklung. Auf diese Aufgabe m{\"u}ssen Schulleiter*innen in Aus- und Fortbildungen vorbereitet werden. Der vorliegende Beitrag untersucht in einem l{\"a}ngsschnittlichen Design Effekte der Fortbildungsreihe Werkstatt „Schule leiten". Die Teilnehmer*innen bewerten die Werkstatt zumeist positiv und es zeigen sich geringe bis moderate Ver{\"a}nderungen in ihrem selbstberichteten beruflichen Handeln. Schulleiter*innen mit wenigen Jahren Leitungserfahrung berichten dabei {\"u}ber die gr{\"o}ßten Zuw{\"a}chse. Der Beitrag diskutiert Implikationen f{\"u}r die Forschung und Fortbildung von Schulleiter*innen.}, language = {de} } @article{KurbanogluYarman2020, author = {Kurbanoglu, Sevinc and Yarman, Aysu}, title = {Simultaneous determination of hydrochlorothiazide and irbesartan from pharmaceutical dosage forms with RP-HPLC}, series = {Turkish journal of pharmaceutical sciences}, volume = {17}, journal = {Turkish journal of pharmaceutical sciences}, number = {5}, publisher = {Turkish Pharmacists Association}, address = {{\c{C}}ankaya-Ankara}, issn = {1304-530X}, doi = {10.4274/tjps.galenos.2019.76094}, pages = {523 -- 527}, year = {2020}, abstract = {Objectives: In this work, a simple and rapid liquid chromatographic method for the simultaneous determination of irbesartan (IRBE) and hydrochlorothiazide (HCT) was developed and validated by reverse phase high performance liquid chromatography (RP-HPLC). Materials and Methods: Experimental conditions such as different buffer solutions, various pH values, temperature, composition of the mobile phase, and the effect of flow rate were optimized. Results: The developed RP-HPLC method for these antihypertensive agents was wholly validated and IRBE was detected in the linear range of 0.1-25 mu g mL(-1) and HCT was detected in the linear range of 0.25-25 mu g mL(-1). Moreover, the suggested chromatographic technique was successfully applied for the determination of the drugs in human serum and pharmaceutical dosage forms with limit of detection values of 0.008 mu g mL(-1) for IRBE and 0.012 mu g mL(-1) for HCT. Conclusion: The proposed rapid analysis method of these antihypertensive drugs can be easily used and applied by pharmaceutical companies for which the analysis time is important.}, language = {en} } @article{GodessRiccitelli2020, author = {Godess-Riccitelli, Moran}, title = {The cipher of nature in Kant's third Critique}, series = {Con-Textos Kantianos : international journal of philosophy}, journal = {Con-Textos Kantianos : international journal of philosophy}, number = {12}, publisher = {Instituto de Filosof{\´i}a del Consejo Superior de Investigaciones Cient{\´i}ficas}, address = {Madrid}, issn = {2386-7655}, doi = {10.5281/zenodo.4304101}, pages = {338 -- 357}, year = {2020}, abstract = {What is it that we encountered with in our aesthetic experience of natural beauty? Does nature "figuratively speaks to us in its beautiful forms", 2 to use Kant's phrasing in the third Critique, or is it merely our way of interpreting nature whether this be its purpose or not? Kant does not answer these questions directly. Rather, he leaves the ambiguity around them by his repeated use of terminology of ciphers when it comes to our aesthetic experience in nature. This paper examines Kant's terminology of ciphers in the Critique of Judgment and demonstrate through it the intimate link aesthetic experience in natural beauty has with human morality. A link whose culmination point is embodied in the representation of beauty as a symbol of morality.}, language = {en} }