A5037559713- Inertial Sensor and Navigation
- GNSS positioning and interference
- Space Satellite Systems and Control
- Geophysics and Gravity Measurements
- Target Tracking and Data Fusion in Sensor Networks
- Spacecraft Design and Technology
- Genomics and Phylogenetic Studies
- Food Allergy and Anaphylaxis Research
- vaccines and immunoinformatics approaches
- Advanced Data Storage Technologies
- Space Exploration and Technology
- Allergic Rhinitis and Sensitization
- Mosquito-borne diseases and control
- Virology and Viral Diseases
- Planetary Science and Exploration
- Aerospace Engineering and Energy Systems
- Statistical and numerical algorithms
- Distributed systems and fault tolerance
- Ionosphere and magnetosphere dynamics
- Advanced Frequency and Time Standards
- Advanced Measurement and Detection Methods
- Electromagnetic Launch and Propulsion Technology
- Security and Verification in Computing
- Distributed and Parallel Computing Systems
- Parallel Computing and Optimization Techniques
Deutsches Zentrum für Luft- und Raumfahrt e. V. (DLR)
2015-2023
Stanford University
2015-2021
Technical University of Munich
2011-2014
The University of Texas Medical Branch at Galveston
2011
Distantly related species entering similar biological niches often adapt by evolving morphological and physiological characters. How much genomic molecular convergence (particularly of highly constrained coding sequence) contributes to convergent phenotypic evolution, such as echolocation in bats whales, is a long-standing fundamental question. Like others, we find that amino acid substitutions are not more abundant echolocating mammals compared their outgroups. However, also ask informative...
Significance Everybody loves dolphins. And orcas. Mx (Myxovirus) genes. genes are important immune that help mammals fight many RNA and DNA viruses, including HIV, measles, flu. We make a surprising discovery: dolphins, orcas, likely all toothed whales lost both soon after they diverged from baleen ungulates, which preserve these intact. Because were simultaneously, we speculate viral outbreak exploiting the may have forced whale’s ancestor to sacrifice both. so important, because 56...
Timing and cache side channels provide powerful attacks against many sensitive operations including cryptographic implementations. Existing defenses cannot protect all classes of such without incurring prohibitive performance overhead. A popular strategy for defending these is to modify the implementation so that timing access patterns every hardware instruction independent secret inputs. However, this solution architecture-specific, brittle, difficult get right. In paper, we propose...
<i>Background:</i> Bla g 2, one of the major cockroach allergens, induces a strong IgE response against conformational epitopes, and on reexposure, sensitized individuals often display symptoms allergic rhinitis asthma. The aim current study was to perform test efficacy modified phage screening, characterization selected phages an automated algorithm, EpiSearch, in locating important epitope. <i>Methods:</i> monoclonal antibody 7C11, which partially inhibits binding...
Motivation: There is a need for rapid and easy-to-use, alignment-free methods to cluster large groups of protein sequence data. Commonly used phylogenetic trees based on alignments can be visualize only limited number sequences. DGraph, introduced here, an application developed generate 2-dimensional (2D) maps similarity scores The program automatically calculates graphically displays property distance (PD) physico-chemical (PCP) similarities from unaligned list FASTA files. Such “PD-graphs”...
Abstract The paper describes how the attitude of a sounding rocket, launch vehicle or satellite with respect to Earth can be estimated from camera images horizon. Details about detecting horizon in image, fitting hyperbolae ellipses detected curve and deriving nadir vector corresponding error covariance fitted conic section are given. presented method works at low heights, where projected mostly appears hyperbolic, as well large elliptic it is irrelevant if fully only partially field view...
Abstract Distantly related species entering similar biological niches often adapt by evolving morphological and physiological characters. The extent to which genomic molecular convergence, the coding mutations underlie this convergent phenotypic evolution remain unknown. Using a novel test, we ask group of functionally coherent genes is most affected amino acid substitutions between phenotypically lineages. This sets reveals 75 convergences in important that pattern highly adapted organ:...
Multi-core programming remains a major software development and maintenance challenge because of data races, deadlock, non-deterministic failures complex performance issues. In this paper, we describe EXCITE-VM, system that provides snapshot isolation transactions on shared memory to facilitate improve the parallel applications. With snapshots, an application thread is not exposed committed changes other threads until it receives updates by explicitly creating new snapshot. Snapshot enables...
Abstract Motivation There is a need for rapid and easy to use, alignment free methods cluster large groups of protein sequence data. Commonly used phylogenetic trees based on alignments can be visualize only limited number sequences. DGraph, introduced here, dynamic programming application developed generate 2D-maps similarity scores The program automatically calculates graphically displays property distance (PD) physico-chemical (PCP) similarities from an unaligned list FASTA files. Such...
Inertial navigation on spin-stabilized sounding rockets and missiles is challenging due to the high spin rate about longitudinal axis. Especially scale factor error of roll axis gyroscope causes an accumulating angle error, which may subsequently transform lateral axes if, for example, rocket actively reoriented. This orientation leads growing position velocity estimation errors whenever propulsion or aerodynamic forces act rocket. Specialized inertial platforms were developed in 1970s with...
Efforts on positioning, navigation and timing (PNT) services from low Earth orbit (LEO) have significantly increased over the last years not only within research institutions, but also by space agencies industry. Satellite mega-constellations in LEO as well increasing need for more resilient secure alternatives to GNSS are major motivations development PNT. Various concepts emerged, which aim either enhance or offer independent PNT alternatives. We present concept current status of a...
This paper gives an overview of the proposed GNC architecture for DLR's Reusability Flight Experiment (ReFEx), which is split into two main subsystems: The Guidance and Control (G&C) subsystem, determines desired trajectory from current flight state to a designated target issues necessary commands actuators (canards rudder, as well reaction control system phases outside atmosphere) by calculating forces torques based on required changes velocity attitude following this trajectory; Hybrid...
This paper focuses on the preliminary design of Hybrid Navigation System (HNS) in development for CALLISTO vehicle. The requirements and boundary conditions derived from mission are briefly introduced their impact navigation is discussed. Subsequently, baseline architecture HNS including considerations its sensor suite will be presented. features an approach that overcomes limitations conventional based purely inertial solutions by fusion measurements different sensors. In order to satisfy...
In early 2015 an inertial laboratory will be installed at TUM's Institute of Flight System Dynamics (FSD). cooperation with ACUTRONIC Switzerland Ltd. AC3350 three-axis motion simulator used to investigate sensor calibration techniques, as well error influences the whole environment. To identify and assess possible on laboratory's quality a simulation process, including models environment, unit under test has been created. The article presents overview identified sources in process. Typical...
As part of the trinational technology demonstration project CALLISTO (“Cooperative Action Leading to Launcher Innovation for Stage Toss-back Operations”), JAXA, CNES, and DLR are jointly developing key technologies a future European reusable launch vehicle (RLV). The goal is build fly vertical take-off landing (VTVL) demonstrator that returns site (RTLS) after its mission. In 2025, there will be ten different test flights with increasing apogee altitudes from several meters up 45 kilometers...