Austrian Academy of Sciences
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Dynamic Workflow Engine of Atmospheric Big Remote Sensing Data Processing Powered by Heterogenous Platform for High Performance Computing. GI_Forum|GI_Forum 2021, Volume 1|
No full textThe development of big remote sensing data related technologies and applications poses a big challenge that massive computing capability is needed to support big data processing. In order to solve this challenge, this paper proposes an architecture of heterogeneous platform of high performance computing, which employs the computer hardware resources to improve the efficiency of big remote sensing data processing by optimizing scheduling strategies and designing high-performance algorithms. Furthermore, the proposed platform can dynamically incorporated with a workflow engine regarding big remote sensing data processing. These algorithms are modular to meet the flexible combination of different processes
A Methodology for Implementing a Digital Twin of the Earth’s Forests to Match the Requirements of Different User Groups. GI_Forum|GI_Forum 2021, Volume 1|
No full textEurope has acknowledged the need to develop a very high precision digital model of the Earth, a Digital Twin Earth, running on cloud infrastructure to bring data and end-users closer together. We present results of an investigation of a proposed submodel of the digital twin, simulating the worlds’ forests. We focus on the architecture of the system and the key user needs on data content and access. The results are based on a user survey showing that the forest-related communities in Europe require information on contrasting forest variables and processes, with common interest in the status and forecast of forest carbon stock. We discuss the required spatial resolution, accuracies, and modelling tools required to match the needs of the different communities in data availability and simulation of the forest ecosystem. This, together with the knowledge on existing and projected future capabilities, allows us to specify a data architecture to implement the proposed system regionally, with the outlook to expand to continental and global scales. Ultimately, a system simulating the behaviour of forests, a digital twin, would connect the bottom-up and top-down approaches of computing the forest carbon balance: from tree-based accounting of forest growth to atmospheric measurements, respectively
Table of Contents. Corpus Fontium Historiae Byzantinae|Vitae et Miracula Sancti Christoduli Patmensis Corpus Fontium Historiae Byzantinae Series Vindobonensis 56|
No full textDas Ophthalmoskopierphantom von Maurice Perrin im Spannungsfeld zwischen Militärmedizin und Ophthalmologie. VIRUS - Beiträge zur Sozialgeschichte der Medizin|VIRUS. Beiträge zur Sozialgeschichte der Medizin Band 19. Schwerpunkt: Objekte als Quellen der Medizingeschichte|
No full textSimulation phantoms are a subclass of models. They serve to learn a demanding (medical)skill. The l’oeil artificiel ophthalmoscopique, developed in 1866 by the French surgeonMaurice Perrin (1826–1889), is regarded as the first ophthalmoscopy phantom that comesquite close to imitating the natural conditions of the eye during mirroring. Such phantoms aredeveloped in order to support the learner to operate e. g. the hand-held-ophthalmoscope. Intensivepractice on the phantom gives the budding physician more confidence in the future use ofthe mirror in a real doctor-patient ophthalmoscopy situation. Perrin’s phantom was especiallyused to train military doctors in coping with the instrument and to analyse refractive errors.However, 19th century specialists showed only little interest in this kind of skill-training for theophthalmologist-to-be
Entwicklung schwingungsisolierter Gerätefundamente für hochgradig erschütterungssensitive Rasterelektronenmikroskope
No full textDie Technische Universität Wien errichtet derzeit auf dem Gelände des österreichischenAtominstituts in der Stadionallee 2 ein neues Institutsgebäude. Im Kellergeschoss desGebäudes werden in Bezug auf Erschütterungsimmissionen hochsensible Rasterelektronenmikroskopebetrieben und die Untersuchung der zur Sicherstellung des störungsfreienBetriebs erforderlichen erschütterungsdämmenden Maßnahmen wurde bereits in derPlanungsphase des Gebäudes beauftragt. Im Artikel werden die örtlichen Anlageverhältnissedes Gebäudezubaus, die maßgebenden Erschütterungsquellen und die Ergebnisse vondurchgeführten Immissionsmessungen vor Baubeginn dargelegt. Auf Grundlage derdurchgeführten Messungen wurden Maßnahmen für den Erschütterungsschutz der Rasterelektronenmikroskopeund für die Raumausführung entwickelt und diese werden im Artikelebenfalls beschrieben
Virus 19. Schwerpunkt: Objekte als Quellen der Medizingeschichte. VIRUS - Beiträge zur Sozialgeschichte der Medizin|VIRUS. Beiträge zur Sozialgeschichte der Medizin Band 19. Schwerpunkt: Objekte als Quellen der Medizingeschichte|
No full textPreliminaries. Corpus Fontium Historiae Byzantinae|Vitae et Miracula Sancti Christoduli Patmensis Corpus Fontium Historiae Byzantinae Series Vindobonensis 56|
No full textGeneralised Poisson Distributions for Modelling Parity
No full textConventional parametric count distributions, namely the Poisson and Negative-Binomialmodels, do not offer satisfactory descriptions of empirical distributions of completed cohortparity. One reason is that they cannot model variance-to-mean ratios below unity, that is,underdispersion, which is typical of low-fertility parity distributions. Statisticians haverelatively recently revived two generalised count distributions that can model bothoverdispersion and underdispersion, but that have to date not attracted the attention ofdemographers. The objective of this note is to assess the utility of these distributions, theConway-Maxwell-Poisson and Gamma Count models, for the modelling of paritydistributions, using both simulations and maximum-likelihood fitting to empirical data fromthe Human Fertility Database (HFD). The results show that these generalised countdistributions offer a greatly improved fit compared to customary Poisson and Negative-Binomial models in the presence of underdispersion, without loss of performance in thepresence of equi- or overdispersion
