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Zinc Electrode Shape-Change in Secondary Air Batteries: A 2D Modeling Approach [article]

Tobias Schmitt, Tobias Arlt, Ingo Manke, Arnulf Latz, Birger Horstmann
2019 arXiv   pre-print
Zinc-air batteries offer large specific energy densities, while relying on abundant and non-toxic materials. In this paper, we present the first multi-dimensional simulations of zinc-air batteries. We refine our existing theory-based model of secondary zinc-air systems. The model comprises thermodynamically consistent multi-species transport in alkaline electrolytes, formation and dissolution of metallic zinc and passivating zinc oxide, as well as multi-phase coexistence in gas diffusion
more » ... des. For the first time, we simulate zinc shape-change during battery cycling by modeling convection of zinc solids. We validate our model with in-situ tomography of commercial button cells. Two-dimensional volume-averaged simulations of cell voltage and zinc electrode morphology during discharge agree with these measurements. Thus, we can study how electrolyte carbonation limits shelf-life and how zinc shape-change limits cycle-life. The charging current is found to be the major contributor to cycle-life limitations. Finally, we optimize initial anode structure and charge-discharge protocols for improved performance and cycle-ability.
arXiv:1903.00382v1 fatcat:ragguixuuradhikkbtufkt5a4y

Religiöse Aspekte von Computerspielen

Tobias Schmitt
2003 Ludwigsburger Beiträge zur Medienpädagogik  
TOBIAS SCHMITT Bereits durch das frühe Alter von ca. 6-9 Jahren 7 , in dem vielen Kinder mit dem Computerspielen beginnen, dürfen meiner Ansicht nach die Einflüsse aber auch die Gefahren von religiösen  ...  Schmitt AUSGABE 3 / 2003 Black & White, dann stellt sich mir die Frage, ob dies der religiösen Entwicklung der Kinder und Jugendlichen 9 förderlich ist.  ... 
doi:10.21240/lbzm/03/06 fatcat:pbl3lhayh5abtlvjvj2orrxr5y

Text/Conference Paper

Tobias Simon, Jana Dolan, Alexander Schmitt, Sven Pagel
2019 Jahrestagung der Gesellschaft für Informatik  
Simon, Jana Dolan, Alexander Schmitt, Sven Pagel Tobias Simon, Jana Dolan, Alexander Schmitt, Sven Pagel  ...  (Diskussion M02, 00:11:09) 3 Bisher nur als projektinterne Beta-Version verfügbar, eine Veröffentlichung wird angestrebt. 4 5 110 Tobias  ... 
doi:10.18420/inf2019_ws11 dblp:conf/gi/SimonDSP19 fatcat:rk5dk5vztza5ppllxjbdslw3eq

Proposal of a Nonlinear Interaction of Person and Situation (NIPS) model

Manfred Schmitt, Mario Gollwitzer, Anna Baumert, Gabriela Blum, Tobias Gschwendner, Wilhelm Hofmann, Tobias Rothmund
2013 Frontiers in Psychology  
They have also been demonstrated in other psychological domains such as justice judgment and behavior (Schmitt et al., 2003; Schmitt and Sabbagh, 2004) .  ...  Synergy is one concept that might help generate substantive explanations for person × situation interactions (Schmitt et al., 2003) .  ... 
doi:10.3389/fpsyg.2013.00499 pmid:23935588 pmcid:PMC3731536 fatcat:3hw2pwewqrg2jjvwidujaq6xxy

Enhanced Dispatchability Of Aircrafts Using Multi-Static Configurations

Christian Engel, Eric Jenn, Peter H. Schmitt, Rodrigo Coutinho, Tobias Schoofs
2010 Zenodo  
This paper describes the reconfiguration strategy and mechanisms adopted in the Integrated Modular Avionics (IMA) based platform designed and evaluated in the scope of the European research and development project DIANA. The mechanisms aim at improving dispatchability of aircrafts while keeping a reasonable and limited impact on certification costs. The paper first introduces the concept of multi-static reconfiguration i.e., a set of pre-qualified configurations from which the active one will
more » ... autonomously selected according to the system health state at system start-up. A configuration selection mechanism, exploiting a Byzantine Agreement algorithm, is discussed. Particular attention is paid to the proof of correctness of the adopted algorithm. Practical considerations concerning its implementation, like, for instance, the authentication protocol to be used are also considered. Finally, the implementation of the mechanism on top of an ARINC 653 Application Executive is briefly described.
doi:10.5281/zenodo.11414 fatcat:znbeo7tszzhxhc6e6ayiqs4wly

Natural blue zircon from Vesuvius

Yi Sun, Axel K. Schmitt, Tobias Häger, Marcus Schneider, Lucia Pappalardo, Massimo Russo
2020 Mineralogy and Petrology  
Alexander Varychev and Jan Schmitt (Heidelberg University) are thanked for their assistance with the scanning electron microscope and the Raman microscope, and Axel Gerdes (Goethe University Frankfurt)  ...  Oxygen isotopic compositions were analysed by SIMS following procedures in Schmitt et al. (2017) .  ...  The plot combines 21 spot analyses on 20 different crystals where homogeneous, inclusion-free domains were preferentially targeted zircon from other alkaline magma systems (e.g., Eifel; Schmitt et al.  ... 
doi:10.1007/s00710-020-00727-7 fatcat:naxtowh3nvdjnp3ilgyckqi7ry

Inverse Reinforcement Learning with Simultaneous Estimation of Rewards and Dynamics [article]

Michael Herman, Tobias Gindele, Jörg Wagner, Felix Schmitt, Wolfram Burgard
2016 arXiv   pre-print
Inverse Reinforcement Learning (IRL) describes the problem of learning an unknown reward function of a Markov Decision Process (MDP) from observed behavior of an agent. Since the agent's behavior originates in its policy and MDP policies depend on both the stochastic system dynamics as well as the reward function, the solution of the inverse problem is significantly influenced by both. Current IRL approaches assume that if the transition model is unknown, additional samples from the system's
more » ... amics are accessible, or the observed behavior provides enough samples of the system's dynamics to solve the inverse problem accurately. These assumptions are often not satisfied. To overcome this, we present a gradient-based IRL approach that simultaneously estimates the system's dynamics. By solving the combined optimization problem, our approach takes into account the bias of the demonstrations, which stems from the generating policy. The evaluation on a synthetic MDP and a transfer learning task shows improvements regarding the sample efficiency as well as the accuracy of the estimated reward functions and transition models.
arXiv:1604.03912v1 fatcat:qcuf5rjl2bf4vcoipgtl5hv4xm

Attribute-based Explanations of Non-Linear Embeddings of High-Dimensional Data [article]

Jan-Tobias Sohns, Michaela Schmitt, Fabian Jirasek, Hans Hasse, Heike Leitte
2021 arXiv   pre-print
Schmitt and H. Leitte are with the Visual Information Analysis group at TU Kaiserslautern. E-mail: • F. Jirasek and H.  ... 
arXiv:2108.08706v1 fatcat:xx2twkef3zgdpdxav5ai7ffglq

What moderates implicit—explicit consistency?

Wilhelm Hofmann, Tobias Gschwendner, Brian A. Nosek, Manfred Schmitt
2005 European Review of Social Psychology  
., Ajzen & Fishbein, 1977) and a search for psychological moderator variables that identify when attitudes or traits reliably predict behaviour (Ajzen, 1987; Bem & Allen, 1974; Block, 1977; Schmitt,  ...  For example, differences in importance positively moderated implicit -explicit correspondence in a study on stereotyping (Hofmann, Gschwendner, & Schmitt, 2005b) and in two studies on voting attitudes  ... 
doi:10.1080/10463280500443228 fatcat:k26iqfrfz5csbadunjz64pxxyy

Guilt Experience in Patients with Obsessive-Compulsive Disorder

Edgar Geissner, Lina Marie Knechtl, Anna Baumert, Tobias Rothmund, Manfred Schmitt
2019 Verhaltenstherapie (Basel)  
Verhaltenstherapie DOI: 10.1159/000503907 Geissner/Knechtl/Baumert/Rothmund/ Schmitt DOI: 10.1159/000503907 Verhaltenstherapie 4 Table 1 . 1 Obsessions-compulsions, depression, and guilt in OCD  ... 
doi:10.1159/000503907 fatcat:fifqmxk6j5bsblty3d7nnqvuwe

The Cost of Photovoltaic Forecasting Errors in Microgrid Control with Peak Pricing

Thomas Schmitt, Tobias Rodemann, Jürgen Adamy
2021 Energies  
Model predictive control (MPC) is widely used for microgrids or unit commitment due to its ability to respect the forecasts of loads and generation of renewable energies. However, while there are lots of approaches to accounting for uncertainties in these forecasts, their impact is rarely analyzed systematically. Here, we use a simplified linear state space model of a commercial building including a photovoltaic (PV) plant and real-world data from a 30 day period in 2020. PV predictions are
more » ... ved from weather forecasts and industry peak pricing is assumed. The effect of prediction accuracy on the resulting cost is evaluated by multiple simulations with different prediction errors and initial conditions. Analysis shows a mainly linear correlation, while the exact shape depends on the treatment of predictions at the current time step. Furthermore, despite a time horizon of 24h, only the prediction accuracy of the first 75min was relevant for the presented setting.
doi:10.3390/en14092569 fatcat:3r7qhsbjpfhltc7fmiahvrh43e

CASi – A Generic Context Awareness Simulator for Ambient Systems [chapter]

Jörg Cassens, Felix Schmitt, Tobias Mende, Michael Herczeg
2012 Lecture Notes in Computer Science  
In this paper, we present CASi (Context Awareness Simulator), a software system for the simulation of context-aware computer systems and environments. CASi provides an abstract framework of components for simulating smart world applications like a smart office or house with ambient sensors and actuators. Agents moving through these application worlds are tracked by sensors and their actions are influenced by actuators, both of which can be programmed to resemble the actual peripherals of the
more » ... ted system. CASi allows testing ambient, context aware computer systems even in early stages of development without the need for expensive prototyping or real world deployment.
doi:10.1007/978-3-642-34898-3_37 fatcat:llvuf6yah5bbzhqgktzyles5fa

A New Model to Ascertain Product Maturity in Product Development Processes

Alexandra Kandt, Tobias Pickshaus, Karsten Fleischer, Robert Schmitt
2016 Procedia CIRP  
Time, cost and quality are the three focused criteria in product development projects. While the factors time and costs can already be tracked very well during the entire course of a project through existing project management methods, the factor quality is by far more difficult to control. How mature the expected final product in the different development phases is, organizations seldom analyze systematically. Existing product maturity models and methods are mainly developed towards the needs
more » ... nd conditions of large companies within the automotive industry and therefore are found to be very complex and time-consuming to implement. This paper deals with the question to which extent existing quality methods are suited to monitor the product maturity during the development process of physical products. Based on established methods a new model is developed to calculate the product maturity during the development process with as less additional effort as possible. One characteristic value, which thereby highly influences the product maturity, is the uncertainty of the used decision data basis in terms of expert knowledge, technical simulation results or test results during the development process. The article ends with a practical validation of the new method, performed in an innovative, small and medium-sized company.
doi:10.1016/j.procir.2016.05.006 fatcat:rgxjnld42zatbpej5be6gno5qe

Individualised Proteogenomics Applied to Analysis of Amino Acid Variants in Malignant Melanoma [article]

Marisa Schmitt, Tobias Sinnberg, Katrin Bratl, Claus Garbe, Boris Macek, Nicolas C Nalpas
2020 bioRxiv   pre-print
Nalpas N, Schmitt M, Macek B. Whole-exome sequencing (and nanopore RNA-seq) pipeline.  ... 
doi:10.1101/2020.12.15.422879 fatcat:jvxmhjczandf7d3vi5x7v3so6e

Acoustics of open fittings

Matthias Blau, Tobias Sankowsky, Alfred Stirnemann, Hannes Oberdanner, Nicola Schmitt
2008 Journal of the Acoustical Society of America  
Acoustics 08 Paris 1259 The use of so-called "open fittings" instead of individual ear shells has become very popular in hearing aid fitting, in particular because open fittings avoid the occlusion effect, but also because they are more comfortable, easier to manufacture, and cosmetically preferred. On the other hand however, there are acoustical issues with open fittings, including the mixture of direct and amplified sound, a poor low-frequency performance, an increased risk of feedback and a
more » ... upposedly less reproducible position of the sound delivering device (tubing or speaker) in the ear canal, which in turn may result in a greater variability of acoustic parameters such as RECD and REOG. The two latter issues are addressed here in a study with 20 subjects, for individual shell and a number of open fittings, comprising closed and open domes of different diameters with tubings as well as with ear canal receivers. It was observed that in comparison to individual shell fittings, the open fittings did not exhibit a higher variability of RECD and REOG, but up to 15dB (closed domes) to 25dB (open domes) lower feedback thresholds.
doi:10.1121/1.2932603 fatcat:77tzvi74inax7na36b7qxpec54
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