Deutsches Zentrum für Luft- und Raumfahrt e. V. (DLR)

Biomass Burning in Australia: No Evidence for Carbonyl Sulfide (OCS) Enhancement in Fire Plumes From In‐Situ Measurements During SouthTRAC

Abstract Determining the atmospheric abundance and the emission sources of carbonyl sulfide (OCS) plays a crucial role for the sulfur budget in the atmosphere. In addition to its main anthropogenic and biogenic sources, biomass burning is assumed to be an essential, but not well...

In-flight receiver calibration of the Ganymede Laser Altimeter (GALA) by passive Earth observations

Abstract. Post-launch characterization of the receiver telescope of the laser altimeter is essential for achieving precise georeferenced planetary measurements and for radiometric calibration to passively measure surface reflectance. For the Ganymede Laser Altimeter (GALA) aboard...

Characterizing lightning NO x production in the Ebro Valley with meteosat 12 LI and LMA observations

Abstract. Lightning is one of the main sources of NOₓ in the Earth’s atmosphere, yet there is considerable variability in NOₓ production during thunderstorms. In this study, we combined optical lightning data from the Meteosat Third Generation (MTG) Lightning Imaging (LI) instrum...

Time Crystals on Quantum Devices

Abstract Time crystals are nonequilibrium phases of matter characterized by the emergence of temporal ordering, in which an interacting many-body system develops robust structure in its time evolution that is not trivially dictated by the external driving or environment. While re...

Impact of control augmentation on pilot workload during shipboard helicopter hover operation

Abstract The integration of control augmentation techniques into helicopter systems aims to assist pilots during the critical phases of shipboard operations to mitigate the effects of ship motion, wind and other environmental factors that can compromise safety. The control augmen...

Mixing ventilation by in-seat air outlets for single-aisle aircraft

Abstract In recent years, alternative ventilation systems for aircraft cabins have attracted the attention of scientists and aircraft manufacturers due to their potential to save energy and increase thermal comfort. The aim of this study was to investigate whether comfortable the...

Understanding the flow behavior around Krueger flaps through the means of CFD simulations

Abstract This study aims to establish the feasibility of Krueger flaps acting as high lift devices on a natural laminar wing aircraft configuration. It is part of the German funded project ‘ULTIMATE’, aiming an aircraft wing design providing fuel savings up to 10% as compared to...

Speaking Each Other's Language: How to Pythonize the Java-Based Framework FAME

Description:We are developing a native Python interface for the Java-based modelling framework FAME. The goal is to make FAME’s existing features completely accessible from Python, without the need of programming (or understanding) any Java. This shall substantially lower the ent...

Extending robustness concepts and model formulations for the timetable-constrained railway station routing problem using absorption graphs

Abstract Ensuring the feasibility and robustness of train operations in stations and network nodes is receiving more and more attention given the trend towards a stronger integration of timetabling and network planning in railway systems. Existing approaches for robust station ro...

High-temperature oxidation and pyrolysis of 2,4-dimethylhexane: Experimental insights into Iso-alkane decomposition and aromatic formation

Iso-alkanes are key constituents of sustainable aviation fuels (SAFs) due to their favorable combustion characteristics, including high energy density and low soot formation. They are therefore widely used as model compounds to study the fundamental reaction kinetics relevant to...

Exploring Teleoperator Perception through Kinesthetic Feedback

Exploring Teleoperator Perception through Kinesthetic Feedback Background: Kinesthetic feedback is essential for effective teleoperation, enabling users to perceive and manipulate remote or virtual environments with precision. Haptic codecs exploit human perception thresholds to...

Exploring Teleoperator Perception through Kinesthetic Feedback

Exploring Teleoperator Perception through Kinesthetic Feedback Background: Kinesthetic feedback is essential for effective teleoperation, enabling users to perceive and manipulate remote or virtual environments with precision. Haptic codecs exploit human perception thresholds to...

Enceladus-like geochemistry fuels methanogenesis under extreme CO 2 limitation

Saturn’s icy moon Enceladus features chemical signatures consistent with an alkaline soda ocean with H 2 production via hydrothermal water-rock reactions. Chemolithoautotrophic methanogenesis is thermodynamically favorable under these conditions, but it is unknown whether CO 2 sc...

Consistency between zonal mean stratospheric and total column ozone trends (2000–2024)

This study presents an updated assessment of stratospheric and total column ozone trends over the 2000–2024 period using six merged limb-profile datasets and six merged total ozone datasets. Long-term changes were quantified using a multiple linear regression framework that accou...

About the influence of the use of geometric altimetry on cruise flight efficiency under nominal operations

Abstract The introduction of global navigation satellite systems (GNSS) generally enables the use of the geometric altitude for altimetry instead of the currently used barometric altitudes, which is indeed a simple and robust method for altimetry but is also subject to various me...

JuRa: The Juventas Radar on Hera Mission to Probe Internal Structure of Didymos and Dimorphos Asteroids

Abstract JuRa, the Juventas Radar, is the sounding radar of the Hera/ESA mission on cruise to the asteroid Didymos and its moon, Dimorphos. In 2027, it will, for the first time, do direct observation of the internal structure of an asteroid for the benefit of both science and pla...

Binder-conductive additive design for practical sulfurized polyacrylonitrile lithium–sulfur batteries

Abstract Lithium–sulfur batteries are widely regarded as promising next-generation energy storage owing to their high theoretical energy density and the abundance of sulfur. Sulfurized polyacrylonitrile (SPAN) has emerged as a compelling active material, retaining the advantages...

DirPA: Addressing prior shift in imbalanced few-shot crop-type classification

Real-world agricultural monitoring is often hampered by severe class imbalance and high label acquisition costs, resulting in significant data scarcity. In few-shot learning (FSL) —a framework specifically designed for data-scarce settings—, training sets are often artificially b...

Mitigating aviation’s environmental impact through alternative fuels and cleaner engines

Lean-burn engines are designed to reduce emissions, and sustainable alternative fuels provide additional potential for lowering particle emissions. However, the magnitude of the benefits from these mitigation levers remains poorly constrained, limiting robust predictions of aviat...

Structural performance of cement paste cylinders cured in microgravity on the ISS: effects of air-entraining agent and simulated microgravity conditions

Abstract As humanity looks to the stars for future colonies, mastering the science of construction in space begins with a deep understanding of how materials perform in extraterrestrial environment. This study pioneers investigations of microgravity effects on cement paste bulk p...