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Targeted stimulation of a category-selective visual region at retrieval boosts memory via enhancing category-specific reinstatement
No full textReactivation of encoding-related neural patterns during retrieval—known as encoding–pattern reinstatement (EPR)—is thought to support episodic memory. Yet, direct evidence for its functional relevance remains limited, and it is unclear whether such content-specific reinstatement can be systematically modulated. Here, we show that non-invasive stimulation of category-selective cortex enhances both memory performance and underlying neural reinstatement in a content-specific manner. Participants encoded word–face and word–scene pairs on Day 1 and received intermittent theta burst stimulation (iTBS) or sham stimulation to the right occipital face area prior to retrieval on Day 2. ITBS selectively improved memory for faces but not scenes. EEG multivariate pattern analysis revealed stronger reinstatement of encoding patterns for faces in the stimulation group. These findings suggest that category-selective cortical regions contribute to content-specific reinstatement during memory retrieval, and that modulating this mechanism may offer new leverage points for targeting representational deficits in memory-related disorders
Multispectral Imaging Data of Torah scroll "Vat. Ebr. 2" captured at Biblioteca Apostolica Vaticana
No full textThis multispectral data of the Torah scroll "Vat. Ebr 2" was captured at the Biblioteca Apostolica Vaticana in June 2023. The goal of the imaging session was to visualize reinked letters, corrections and other otherwise invisible features of the scroll. The MSI images are intended to help choose smaller areas and spots for measurements with XRF, Raman or FTIR. Additionally, they provide information about the conservation condition, for example displaying levels of mold damage. The scroll was previously digitized in great resolution from both sides. Link to digitized scroll (Biblioteca Apostolica Vaticana) In this MSI campaign only the text side of the scroll was imaged. The MSI campaign was co-organised by the Biblioteca Apostolica Vaticana, the Centre for the Study of Manuscript Cultures (CSMC), the Bundesanstalt für Materialforschung und -prüfung (BAM). Imaging was carried out using the CSMC MegaVision multispectral imaging system. The MSI system was operated by the CSMC staff, the scroll was handled by the staff of the Vatican Library digitization and conservation departments. (See contributors)
Preview JPEGs in sRGB color space are compressed and of lower quality and are only intended for quick previewing. Original, high quality, CIELAB TIF images can be found in the PROCESSED folders within each ZIP file. Each uploaded ZIP file contains the flattened, processed and color images for a single sheet of the scroll. Raw images are not included in this dataset simply for size reduction purposes. Raw images are stored internally on the servers of CSMC and, if necessary, can be separately accessed upon a reasonable request. For information about filenames and folder structure as well as MSI system, please see the files in the "info" folder and read the Brief Descriptions of Multispectral Imaging (MSI) Datasets.
Image processing was performed with Hoku image processing software. In each processed folder there are 6 images. A visible light color image called "PSC", an image highlighting the reinking called "Reinking", an image highlighting the texture called "Texture", an image showing the mold damage on sheets where mold is present called "Mold", as well as two pseudocolor images called "UVB_Composite" showing fluorescing materials present on the sheets and a "Pseudocolor" image which color-codes the reinking in blue and red for better visibility and as an alternative to the greyscale "Reinking" image
Dissertation Project Imke Grashoff
No full textThis upload contains the structured overview of the research data related to the dissertation project entitled "Socio-Technical Perspectives on Artificial Intelligence Design, Development, and Implementation", conducted by Imke Grashoff from the Professorship of Information Systems and Digital Innovation at the University of Hamburg Business School. The research data includes the empirical materials collected in the four studies and the supporting documents required for their collection. In detail, this includes:
(1) Interview transcripts
(2) Observation Protocols and Memos
(3) Trace data from a feedback channel
(4) Template consent forms for interviews
(5) Ethical approvals from the University of Hamburg and the case organizations
(6) Sample interview guidelines
(7) Excerpts from data analyse
Multistage User Studies - A Case for Hard to Reach Usergroups
No full textHCI is a swiftly advancing field, with insights gained from new studies published year round. Many studies target specific user groups that may be difficult to access, time-constrained, or small in size. Such groups may include older adults, individuals with disabilities, children, or people from diverse cultural backgrounds. In such contexts, we aim to illustrate how to adhere to guidelines, ensuring the delivery of safe, well-tested interaction methods and tailored approaches by following responsible research practices. To facilitate this process, we present our approach of four phases of multistage user studies, namely (i) lab studies, (ii) static field studies, (iii) mobile field studies, and (iv) remote online studies. We also present use cases, which evaluate the methods and tools involved in each phase and provide guidelines for selecting an approach
Aeolus + Processes, Final Report
No full textThe report presents the results of ESA Contract No. 4000139422/22/I-NS, offering in-
sights into processes and model features influenced by the assimilation of Aeolus horizontal
line-of-sight (HLOS) winds into the ECMWF system.
Using observing system experiments (OSEs), the project provides strong evidence that
Aeolus’ impact on tropical easterlies and westerlies is closely linked to the background
wind shear. The assimilation of HLOS winds enhances the vertical shear of the zonal-
mean zonal wind in the tropical upper troposphere and lower stratosphere (UTLS). This
enhancement arises from the effect on the zonal-mean balanced flow, which is strengthened
by the assimilation of HLOS wind profiles. These effects on the zonal mean state were most
pronounced during the disruption of the quasi-biennial oscillation (QBO) in the winter of
2019/2020. During this period, Aeolus assimilation led to significant changes in vertical
momentum fluxes in the lower stratosphere compared to experiments without Aeolus data.
The assimilation of Aeolus winds amplifies the zonal wind amplitudes of equatorial
Kelvin and n = 1 Rossby waves in the tropical tropopause layer (TTL). This impact is
asymmetric, reflecting the stronger background shear in easterlies, and underscores the
importance of observing shear zones within the UTLS to reduce tropical analysis uncer-
tainties. Through 4D-Var, Aeolus also affects the meridional winds associated with mixed
Rossby-gravity (MRG) waves. The largest effects on equatorial Kelvin and n = 1 Rossby
waves occur at planetary scales, while for MRG waves, they appear at synoptic scales. Ad-
ditionally, Aeolus assimilation systematically reduces the amplitude of divergent circulation
(inertia-gravity modes) and associated vertical velocity at subsynoptic scales.
The strong coupling between Aeolus’ effects and background shear highlights the im-
portance of vertical resolution in follow-on missions. It is recommended to maximize the
vertical resolution of wind profile measurements, especially within the TTL.
Aeolus and COSMIC2 exhibit complementary effects across several evaluated metrics
and processes. Both datasets influence the zonal-mean zonal wind by sharpening the verti-
cal shear zones associated with the QBO. The 4D-Var system generates pronounced effects
on meridional winds from both Aeolus and COSMIC2 data, emphasizing uncertainties in
cross-equatorial flow. However, differences in the balance properties of Aeolus and COS-
MIC2 analysis increments − Aeolus assimilation tends to reduce unbalanced meridional
wind in the stratosphere, whereas COSMIC2 assimilation tends to increase it − require
further investigation.
A special long-term OSE using an ERA6 prototype demonstrated positive impacts
of Aeolus assimilation on analyses and forecasts, with no detrimental effects from data
gaps or variations in data quality. Consequently, Aeolus winds will be assimilated into
the forthcoming European reanalysis, ERA6, ensuring the enduring scientific value of the
Aeolus dataset for climate applications.
The project also developed a novel method to quantify the predictability impact of
observing systems across scales. Applying this method to a set of forecasts from December
2022 revealed that Aeolus data increased predictability by approximately three hours within
the TTL at the 3-day forecast range
'Abǝnnat for Ethiopia's Modern Education
No full textProceedings of the Conference organized by the project Documenting an Ancient Education System in Africa: ʾAbənnat Təmhərt in Ethiopia (Hiob Ludolf Centre for Ethiopian and Eritrean Studies, Hamburg University, and Addis Ababa University
X-Ray Fluorescence and Reflectography Data from Hamburg, Staats- und Universitätsbibliothek Hamburg Carl von Ossietzky, Cod. Philol. 88
No full textXRF (Bruker M6 JetStream: 50kV, 600 µA, maps with 50 µm step and 100 ms per pixel) and reflectography (DinoLite AD4113T-I2V: x40 magnification, transmissive, visible, ultraviolet ~395 nm and Near Infrared ~940 nm light) analysis of inks from Cod. Philol. 88 from the Staats- und Universitätsbibliothek Hamburg Carl von Ossietzky.
Cod. Philol. 88 (State and University Library of Hamburg) is a multilayered Greek paper manuscript from the late 13th century, most likely produced in Constantinople. It constitutes the second part of Barb. gr. 164 (Biblioteca Apostolica Vaticana). Besides the main scribe, Alexios, several additional hands annotated the manuscript during the 15th century. Through the application of UV-VIS-NIR reflectography and μ-XRF imaging, we identified eight distinct iron-gall inks and vermilion as the red colorant. The results of this investigation are published in K. Grigoriadou, O. Bonnerot, C. Colini, "Investigating the Inks of Cod. Philol. 88 (State and University Library Hamburg) through UV-VIS-NIR reflectography and μ-XRF imaging", in: D. Deckers, L. Orlandi, J. Maksimczuk (eds.). Festschrift NN (in press, to appear in the series Transmissions, De Gruyter, in 2025).
00_CodPhilol88_Preview.jpg - photo taken during analysis of the codex, for illustration purpose
CodPhilol88_Protocol.pdf - analytical protocol
CodPhilol88_reflectography.zip - complete reflectography dataset
CodPhilol88_XRF.zip - completeX-ray fluorescence datase
Perspektiven zur Integration von Forschungsdatenmanagement in das Lehramtsstudium
No full textIm Rahmen des Digital and Data Literacy in Teaching Lab (DDLitLab) Gesamtprojektes wurden die zwei Projekte „Early Education in Data Management Decisions“ (E2D2) und „Early Education in Data Management Decisions – an adapted course“ (E2D2 adapted) 2022 bis 2024 gefördert.
In diesem Zusammenhang wurden qualitative Interviews mit drei Lehrenden durchgeführt, um ihre Perspektiven zur Integration von Forschungsdatenmanagement (FDM) in das Lehramtsstudium zu ermitteln.
Die Kohorte bestand aus Hochschuldozierenden, die bereits durch Drittmittelprojekte und in der Lehre Erfahrungen mit FDM gesammelt haben.
Von den drei Befragten war eine Person weiblich und zwei männlich. Alle Befragten waren zum Zeitpunkt der Befragung an der Erziehungswissenschaftlichen Fakultät der Universität Hamburg Dozierende und haben Studierende in verschiedenen Lehramtsstudiengängen oder im Studiengang Erziehungswissenschaft unterrichtet.
Die Befragungen wurden im Dezember 2022 in 15- bis 30-minütigen Interviews per Zoom-Meeting online durchgeführt, das vorherige Einverständnis zur Aufzeichnung wurde gegeben und die Befragten haben zuvor eine Informierte Einwilligungserklärung unterzeichnet, die über die Studie und die Datenverarbeitung informierte.
Die Interviews wurden aufgezeichnet und anschließend transkribiert. Die Anonymisierung erfolgte mit @@Name##.
Die Interviewdaten wurden für eine Publikation „Lecturers' perspectives on the integration of research data management into teacher training programmes” verwendet
Full metadata for Jerusalem guestbook of Miryam and Moshe Ya'akov Ben-Gavriêl (1927-1966)
No full textThe dataset contains all metadata collected and created in the context of a digital edition of the Jerusalem guestbook (1927-1966) of Miryam and Moshe Ya'akov Ben-Gavriêl, kept at the National Library of Israel, call no. ARC. Ms. Var. 365 1 11. The Excel file contains two spreadsheets: "entries" contains information on almost 1,200 individual entries in the guestbook and "visitors" contains information on the visitors that have been identified by name.
More information on the guestbook and direct access to the exploration environment can be found at https://csmc.demo.hcds.uni-hamburg.de/ The digital edition is part of the research project RFE22 "A Fresh Look. Visualising Digitised German-Jewish Archives" at the Cluster of Excellence Understanding Written Artefacts (UWA) and has been realized in close cooperation with the Hub of Computing and Data Science (HCDS)
When Brand Hashtags Backfire: Investigating the Impact of Brand Hashtags in User-Generated Content
No full textThe uploaded files contain all data, code and the publication (manuscript + appendix) for the paper "When Brand Hashtags Backfire: Investigating the Impact of Brand Hashtags in User-Generated Contents"