We report the synthesis of a fluorescent polycyclic aromatic hydrocarbon dye with a "symmetry-broken" core, derived from the related hexa-peri-benzocoronene core with a fluoranthene subunit. The fluorophore is composed of a pure carbon skeleton without heteroatoms and exhibits remarkable photoluminescence properties with a photoluminescence quantum yield of up to 67% in toluene, exceeding that of the parent hexa-peri-benzocoronene by a factor of 30. The single crystal X-ray structure reveals the distorted polycyclic aromatic hydrocarbon structure, which is responsible for the optoelectronic properties, as supported by density functional theory calculations. We show that the new fluorescent dye can be readily used for the fabrication of organic light-emitting diodes without extensive optimization, whereby solubility in a variety of solvents and successful film formation are decisive.

This study explores the stratospheric pathway of the Arctic mid-latitude linkage (AML), a mechanism that connects Arctic amplification (AA) to cold winter weather in mid-latitudes. Using the chemistry-climate model EMAC, we investigate the transition of the AML signal between the troposphere and the stratosphere, focusing on changes in wave activity. Three timeslice experiments were analyzed, covering pre-industrial (1850), present (2020), and future (2100) climates. Compared to a pre-industrial state, both climate change simulations reveal increasing wave propagation and wave breaking in the stratosphere, accompanied by a higher occurrence of sudden stratospheric warmings (SSWs). This intensified wave activity enters the stratosphere particularly from the North Pacific and the Atlantic/European region. An evaluation of subseasonal wave activity episodes reveals more frequent tropopause-level wave input events during winter. While we found a significant rise in SSW events in our climate change simulations, their downward influence on mid-latitude winter weather appears to diminish, likely due to a warmer Arctic and the reduced severity of cold air outbreaks. Furthermore, we relate the changes in planetary wave generation to tropospheric baroclinicity, which is controlled by horizontal temperature gradients and static stability. Notably, AA suppresses baroclinic wave formation by weakening horizontal temperature gradients in the lower troposphere. In contrast, the enhanced wave generation in the mid-latitude upper troposphere could be attributed to temperature modifications at nearby altitudes, driven by tropical warming and lower-stratospheric cooling. Finally, considered in isolation, the polar jet was not found to weaken or become more wavy, as proposed by the AML hypothesis.

We present sedimentological data from 3 sediment cores (RI 05, RI 12 and RI 13), which were obtained from a backfilled Weser paleo-meander near the town of Rinteln in Lower Saxony, Germany.

The sediment cores were extracted during two field campaigns in April and August of 2023 using a petrol-driven Wacker hammer (BHF 30 S) with closed steel tubes equipped with PVC liners (5 cm diameter). In the Laboratory for Physical Geography of the Freie Universität Berlin the PVC liners were opened and extracted sediments were cleaned and documented.

The presented sedimentological parameters include: raw data of elemental composition derived by a portable energy-dispersive X-ray fluorescence spectrometer (Thermo Scientific Niton XL3t, see Hoelzmann et al. 2017; https://doi.org/10.5194/gi-6-93-2017) and volume-specific magnetic susceptibility (frequency 0.46 kHz, with an MS2C core scanning sensor and an MS3 meter; Bartington Instruments), both measured on the split sediment cores. Raw measurements of grain size distributions were done using a Beckmann Coulter LS13320 with PIDS (six measurements per sample). Carbonates were dissolved using 17 % HCl and organic material was removed by applying 30 % H2O2 for several days in a 40 °C water bath. Prior to measuring, 0.5 g Na4P2O7 was added as an anti-coagulation agent, the samples were placed in an overhead shaker for 24 h and exposed to ultrasonic. Loss on Ignition was investigated following the procedure described by Dean (1974; https://doi.org/10.1306/74D729D2-2B21-11D7-8648000102C1865D) and calculated after Heiri et al. (2001; https://doi.org/10.1023/A:1008119611481). pH values and electric conductivity were determined on subsamples of 5 g in a solution of 12.5 ml bi-distilled water with the eco Testr pH2 and the HANNA DiST HI 98303. All subsamples were measured twice and the results averaged.

In the pursuit of more secure information transfer, advanced nanoelectronic technologies and nanomaterials must be developed. Here, we present a material able to undergo an unprecedented light-pumped directional charge transfer process reminiscent of toppling dominoes. The material is based on ortho-fluorinated azobenzene molecules which are organized in molecular rows by the regular array of a metal-organic framework. The azobenzene molecules undergo light-induced transcis forward as well as electrocatalytic cistrans backward isomerization. Our findings reveal that electron hopping occurs in a sequential and propagating manner between the light-generated cis isomers along with an isomerization of the sample to the trans state. Thus, light can be used to locally write information, which subsequently can be read out by the transferred charge with simultaneous deletion of the information. This freely repeatable, self-erasing domino information transfer is a groundbreaking new mechanism to process information on the molecular level that may find application in encryption.

We present data from two geoarchaeological/ethnohistorical field campaigns carried out in Tadjoura (Djibouti) in 2023 and 2024.

It accompanies the paper Hardt et al. (submitted to Archäologische Forschungen in Afrika in March 2025): Ancient routes of interaction in the historical sultanate of Tadjoura - results of two geoarcheological and ethnohistorical research seasons in 2023 and 2024

The data published here come from sediments sampled within archaeological structures and are used for their detailed description and dating. For radiocarbon dating, charcoal or other organic fragments were extracted from the sediment by floatation. The dating was carried out at the Poznan Radiocarbon Lab via AMS. The sedimentological parameters include grain size distribution curves based on laser diffraction measurements (3 measurements per sample; Beckman Coulter LS 13320) and raw data of the elemental composition obtained by a portable energy-dispersive X-ray fluorescence (XRF) spectrometer (Thermoscientific Niton XLt3). Sedimentological works were carried out in the laboratory for Physical Geography at Freie Universität Berlin. The preparation steps followed the standard laboratory procedure (cf. Hardt et al., 2023; doi.org/10.5194/egqsj-72-37-2023).

The raw XRF data include measurements of the following standard material that can be used for calibration: RF25 => NCS DC 73325 Soil, China National Analysis Center for Iron and Steel (2008) RF87 => NCS DC 73387 Soil, China National Analysis Center for Iron and Steel (2008) RF89 => NCS DC 73389 Soil, China National Analysis Center for Iron and Steel (2008)

Frühmoderne gedruckte Erzähltexte sind multimodal. ORDNEL bietet eine möglichst vollständige Druckübersicht mit detaillierten Informationen zur Multimodalität gedruckter deutscher und niederländischer Erzählliteratur bis 1800 (Griseldis; Reineke Fuchs; Fortunatus), die zu den Top Ten Erzähltexten im frühmodernen Europa gehören. Insgesamt sind 319 Drucke in 1069 Exemplaren erfasst. Jeder Eintrag bietet folgende Angaben: Autor:in/Übersetzer:in, Titel, Druckort, Drucker:in(verleger:in), Verleger:in, Entstehungsjahr, Quelle der Information, Kollation, Umfang des Drucks in Seiten, Format, Titelblattholzschnitt, Holzschnitte, Anzahl der Wiederholungen der Holzschnitte, Künstler:in. Im Hinblick auf die Überlieferung werden Angaben zur Zahl der Exemplare, zu den Exemplaren in den Bibliotheken und Archiven und zu den Digitalisaten der Drucke gemacht. Ebenso sind Angaben zur Sekundärliteratur, Bemerkungen zu inhaltlichen, formalen und paratextuellen Aspekten sowie zur Sprache erfasst (Stand: Februar 2024).

Der Datensatz enthält Messwerte im fünf Minuten Takt des 'FU- Microclimate network' (FUMiNET) aus dem Berliner Stadtgebiet. Dieses Messnetz wurde kontinuierlich seit dem Jahr 2017 aufgebaut und dient der skalenübergreifenden Erfoschung des Stadtklimas von Berlin, welches durch das BMBF 'Stadtklima im Wandel Projektes' (https://www.uc2-program.org/) gefördert wurde. Die Stationen sind so aufgebaut, dass die Stadtstruktur von Berlin gut abgebildet wird. Gemessen wird die 2m Temperatur und Feuchte. Im Datenpaket sind die Daten des Jahres 2024 enthalten. Zu jeder der Stationen gibt es eine Datei mit gepackten Daten im CSV Format. In einer Gesamtbeschreibung als eine pdf Datei sind die Standorte expliziert beschrieben.

The spin-crossover (SCO) properties of the dinuclear complex [{Fe(H2B(pz)2)2}2μ−(ac(bipy)2)] were studied as (sub)-monolayer and thin film deposited by an ultra-high vacuum liquid-jet deposition technique on highly oriented pyrolytic graphite (HOPG) by X-ray absorption spectroscopy. A comparison of the SCO properties of thin films and a dropcast sample indicates that the spin-switching probability of the thin films is limited due to substrate–molecule interactions. The maximum percentage of molecules in the low-spin (LS) state observed for 0.7 and 1.8 monolayers (ML) is approximately 43 % at a temperature of 80 K in comparison to the dropcast sample where ≈ 66 % of the complex is in the LS state. The similar switching properties of the dropcast sample as of a bulk powder sample confirm that the SCO properties are not affected by the presence of solvent necessary for deposition. The soft-X-ray-induced excited spin-state trapping (SOXIESST) effect is pronounced in all samples, although the light-induced high-spin (HS) fraction of the dropcast and the thin-film samples on HOPG is higher as compared to the HS fraction attained by SOXIESST, which confirms the sensitivity of the complex to light.

Der Datensatz enthält Minutenwerte der meteorologischen Messgrößen Luftdruck, Niederschlag, Luftfeuchtigkeit, Beleuchtungsstärke und Lufttemperatur (mittels verschiedener Sensoren gemessen und modelliert), die mit dem Messgerät MESSI erhoben wurden. Der MESSI (Mein eigenes Subskalen Messinstrument für atmosphärische Größen) ist eine kostengünstige Wetterstation für Citizen Science Projekte, die an der Freien Universität entworfen wurde.

Zudem beinhaltet der Datensatz auch Messungen von Wetterstationen der Firma Pessl Instruments, die die Messgrößen Lufttemperatur, Luftfeuchtigkeit und Niederschlag beinhalten. Bei diesen Stationen ist die minimale Messfrequenz 5 Minuten. Alle 98 Messstationen wurden dabei vornehmlich in Kleingärten von teilnehmenden Bürger:innen platziert. Die Messungen fokussierten sich jeweils auf die Sommermonate 2023, wobei vereinzelte Stationen auch über einen längeren Zeitraum gemessen haben.

This dataset presents detailed coverage information derived from catalogs of CO₂ jet deposit features—fans and blotches—observed at the Martian South Pole. Generated using high-resolution HiRISE imagery from the Mars Reconnaissance Orbiter (MRO), the dataset quantifies the spatial extent and distribution of these seasonal deposits across multiple Martian years. The coverage data is crucial for understanding the dynamics of CO₂ sublimation and its interaction with surface and atmospheric processes.

The coverage metrics were calculated from annotated features compiled through contributions from the citizen science project Planet Four and advanced clustering algorithms. Each dataset entry includes coverage percentages, and the tile and image identifiers. The data spans several key regions of interest, providing insights into Martian polar processes.

This coverage dataset is a valuable resource for planetary scientists, climate modelers, and researchers focused on Martian seasonal dynamics and atmospheric coupling.

This dataset comprises comprehensive catalogs of CO₂ jet deposit features—fans and blotches—captured at the Martian South Pole. Derived from High-Resolution Imaging Science Experiment (HiRISE) imagery onboard the Mars Reconnaissance Orbiter (MRO), the catalogs were developed as part of a thesis exploring seasonal sublimation-driven processes and their implications for Martian surface-atmosphere interactions. The data was created through an extensive workflow, including contributions from the citizen science project Planet Four, advanced density-based clustering (DBSCAN), and ground-projection techniques to generate geographic coordinates. Each entry includes detailed metadata such as location, morphology, orientation, and classification into either fan or blotch types. Additionally, we also provide multiple catalogs including more metadata. The dataset serves as a vital resource for planetary scientists, atmospheric modelers, and researchers studying Martian polar dynamics. It provides foundational data for investigating surface-atmosphere coupling, wind patterns, and the spatial-temporal behavior of seasonal CO₂ jet deposits.

Der Datensatz enthält Minutenwerte der meteorologischen Messgrößen Luftdruck, Niederschlag, Luftfeuchtigkeit, Beleuchtungsstärke und Lufttemperatur (mittels verschiedener Sensoren gemessen und modelliert), die mit dem Messgerät MESSI erhoben wurden. Der MESSI (Mein eigenes Subskalen Messinstrument für atmosphärische Größen) ist eine kostengünstige Wetterstation für Citizen Science Projekte, die an der Freien Universität entworfen wurde. Zudem beinhaltet der Datensatz auch Messungen von Wetterstationen der Firma Pessl Instruments, die die Messgrößen Lufttemperatur, Luftfeuchtigkeit und Niederschlag beinhalten. Bei diesen Stationen ist die minimale Messfrequenz 5 Minuten. Alle 38 Messstationen wurden dabei vornehmlich in Kleingärten von teilnehmenden Bürger:innen platziert. Die Messungen fokussierten sich jeweils auf die Sommermonate 2022, wobei vereinzelte Stationen auch über einen längeren Zeitraum gemessen haben.

The Mars 2020 Terrain Relative Navigation HiRISE Orthorectified Image Mosaic provided by USGS was used together with the pixel-aligned HRSC color data to produce a pan-sharpened color mosaic that retains the original spatial resolution of 50 cm per pixel. The pansharpening method used here is HSV color space conversion.

The HRSC color processing is described in Michael et al. (2016). An overview of the HRSC processing methodology and product characteristics is described in Gwinner et al., 2016.

Image credits: ESA/NASA/DLR/JPL/USGS/FUB/S.Walter

This CSV file records the search results for terms "etat AND armes" and "etat AND artillerie" (condition/inventory AND weapons, condition/inventory AND artillery) from documents relating to the Caribbean, Louisiana and Guyana colonies of the First Colonial Empire collection, held at the French Archives nationales d'outremer (Overseas archives). The results range from 1675 to 1815. The file records the search term, archive directory and code of the record, date of the record, kind of record, title, and availability online. It then records whether the record includes any remarks on the condition of weapons/artillery (as opposed to simply recording numbers), and if so whether problems are noted, whether those noted problems are related to decay or climate, and finally whether mention is specifically made of rust/oxidisation. This data is intended to support the RUSTEE project; specifically, research into how the claims made in travel narratives about the problems with rusting equipment in different climates (Ligon 1673, Ellis 1748) are or are not reflected in routine colonial administrative correspondance in France's equatorial American colonies. It should also be useful to researchers interested more generally in the role of the island environment, climate and weather in European colonial projects.

The dataset contains shape-files of the valleys and deltas in the Jezero crater on Mars: 1) initial and last incision valleys for the western inlet, northern inlet and outlet; 2) minimum, medium and maximum extents of the western and northern deltas. The mapping was done in ArcGIS 10.8.2 using CTX and HiRISE data (Planetary Data System Imaging Node https://pds-874 imaging.jpl.nasa.gov/) and HRSC data (data archives of ESA and NASA and https://maps.planet.fu-berlin.de [Walter et al., 2018]). For the minimum extent of the western delta a GIS version of the map of [Stack et al., 2020] was used. Details of mapping are described in [Ovchinnikova A. et al. A modeling approach for water and sediment transport in Jezero crater on Mars based on new geomorphological evidence. Icarus (accepted)].

The Central Mountain Range of Taiwan represents an exclusive location for palaeo-climate and palaeo-glaciation research in monsoonal East Asia as it provides high altitude terrestrial data in an oceanic environment. This study focuses on the dating of boulders and rock surfaces by means of paired (Be-10/ Al-26) in-situ produced cosmogenic nuclides in two mountain ranges - the Nenggao Shan and the Hsueh Shan - to estimate the time of previous glacier extents. The results will be presented in scientific journals available under the provided DOIs.

Here we present the original AMS nuclide concentration measurement data of Be-10 and Al-26 and their ratios from 16 samples. The sample preparation including quartz separation as well as Be and Al isolation were carried out at the Purdue Rare Isotope Measurement Laboratory (PRIME Lab), Purdue University, West Lafayette, US., nuclide concentrations of Be-10 and Al-26 were determined by accelerator mass spectrometry (AMS). Field work and sampling were funded by the German Academic Exchange Service (DAAD), Grant 57137675. The sample analysis was funded by the German Research Foundation (DFG), Grant BO 659/28-1, project-no. 424056024.

The dataset is related to the Horizon 2020 Una.Resin project Work Package 1 mapping exercise (Task 1.2) on Research & Innovation (R&I) strategies and strategic initiatives. This task was carried out from February to August 2021 by the University of Helsinki and Freie Universität Berlin. Questionnaire was targeted at the research professionals and policymakers at each of the eight Una Europa universities participating in the project (University of Edinburgh; University of Helsinki; University of Bologna; Complutense University of Madrid; Freie University Berlin; 3 Katholieke Universiteit Leuven; Jagiellonian University; Université Paris 1 Panthéon-Sorbonne) aiming to identify the complementary strengths, values, opportunities and barriers for the building the capacities for research collaboration in this alliance. Questionnaire helped us to understand specifically the university level strategic research themes or areas / thematic priorities, areas of excellence, multidisciplinary structures, strategic partnerships and the universities’ codes of conduct or other value-based regulations. The benchmarking served as a groundwork for development of the Una Europa R&I strategy that was launched in November 2023. Task was conducted together with the WP2 colleagues, who prepared the second part of the questionnaire benchmarking the existing strategies, policies and initiatives on research infrastructures. The WP2 has provided a separate dataset presenting the part 2 answers and curated by the University of Bologna. This dataset is available by request: a.franchini@unibo.it.