727 research outputs found
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Ground Truth data for printed Malayalam
No full textGround Truth (GT) data (JPG, PAGE and ALTO XML files) which can be used to train OCR models that recognize printed text in Malayalam script. The training material is gathered from 19th and 20th centuries prints.
The GT data was trained in Transkribus with the HTR+ and the PyLaia engine with a resulting CER of 2.29% on validation set with HTR+ and 3,20% with PyLaia. The training was performed on 43 pages with appr. 9,000 words. The validation set consisted of 5 pages (ca. 1,000 words).
Transcription was performed by Tübingen University Library, the Ground Truth data was created by Elena Mucciarelli (University of Groningen) with support and model training by Dorothee Huff (Tübingen University Library)
Neural Rerankers for Dependency Parsing
No full textThis resource contains code for different types of neural rerankers
(RCNN, RCNN-shared and GCN) from the paper: Do and Rehbein (2020). "Neural Reranking for Dependency Parsing: An Evaluation".
We also include in this resource the pre-trained models of different rerankers on 3 languages: English, German and Czech that are used to report results in the paper.</p
Ergänzungsmaterial zu: Blades, bladelets or blade(let)s? Investigating early Upper Palaeolithic technology and taxonomical considerations / Klingen, Lamellen oder beides? Untersuchungen zur früh-jungpaläolithischen Technologie und taxonomische Überlegungen
No full textThe early Upper Palaeolithic marks a technological turning point in Western Eurasia, evidenced by the increased spread of bladelet production. The two main technocomplexes, the Aurignacian and the Ahmarian, have long histories of research and have always formed part of the debate on the Homo sapiens dispersal into Europe, with changing interpretations. A large aspect of the debate surrounding the recognition of different technocomplexes revolves around the question of whether or not bladelet production is independent of blade production. Here we present a first-hand analysis of three early Upper Palaeolithic assemblages in Europe and the Levant, conventionally attributed to different technocomplexes: Al-Ansab 1, Românești-Dumbrăvița I GH3, Grotta di Fumane A1-A2. Results show that the lithic technologies at the three sites display almost identical knapping concepts, geared around bladelet production. These results and other recent reassessments support a revision of the early Upper Palaeolithic technological and taxonomical models
Codices Palatini latini – Medizinische Handschriften
No full textHere you can find the descriptions of the Latin Palatine manuscripts as published in the manuscripts catalog "Die medizinischen Handschriften der Codices Palatini Latini in der Vatikanischen Bibliothek", edited by Ludwig Schuba, Wiesbaden 1981 (Kataloge der Universitätsbibliothek Heidelberg 1). The description for each manuscript was subsequently recorded as TEI-XML file by XML encoding in accordance with TEI-P5 using GND standard vocabulary.These TEI files follow an outdated TEI schema originally developed at the Herzog August Bibliothek Wolfenbüttel and contain some ad hoc solutions which were chosen pragmatically in Heidelberg and which do not always comply with the TEI Guidelines. A future migration of the dataset into a fully TEI-compliant format is considered as desirable
Ergänzungsmaterial zu: Glycymeris molluscs in the context of the Upper Palaeolithic of Southwestern Germany / Glycymeris Mollusken im Kontext des Jungpaläolithikums Südwestdeutschlands
No full textVogelherd and Petersfels are two of the richest central European Palaeolithic sites from the Aurignacian and Magdalenian periods. Vogelherd is known for its figurative art, flutes and ornaments made of ivory, while Petersfels is known for its complex ornament assemblage, especially the female figurines made of jet. Both sites yielded Glycymeris molluscs, which can provide unique information on the mobility and social behaviour of groups from the Upper Palaeolithic of southern Germany. In this paper, we examine the Glycymeris finds from southern Germany and place them in a broader European context by summarising the finds from Belgium, Switzerland, France, and Italy. Glycymeris are one of the most common bivalve species in the Upper Palaeolithic of Central Europe and are found from the Aurignacian until the Magdalenian. The analyses presented here constitute a functional analysis of Glycymeris and an interpretation of their significance in terms of longdistance connections. Finally, we address use-traces and residues left on the Glycymeris and put forward various hypotheses for future investigation
Hexakis-TIPS-Alkynylated Nonacenes: Persistent and Processible [data]
No full textWe prepared and characterized (UV-vis, epr, X-ray) four substituted nonacenes. They are the most stable and soluble nonacenes to date – due to six strategically placed triisopropylsilyl (TIPS)-ethynyl groups. They are stable for several weeks in the solid state. In dilute solution their half-life is 5-9 h. Crystal structure analyses of two nonacenes prove their structures. A nonacene derivative was tested in a solution-processed transistor and exhibits ambipolar charge transport (µe=0.007 cm2/Vs; µh=0.023 cm2/Vs)
Benzo-Fused Perylene Oligomers with up to 13 Linearly Annulated Rings [Data]
No full textThe longer acenes with more than six linearly fused six-membered rings are still fascinating chemists and physicists because of their unique photophysical properties and their high potential for organic electronics applications. Unfortunately, with increasing size (seven and more rings) these compounds rapidly lose chemical stability. Besides kinetic and chemical stabilization approaches introducing either bulky or electron-withdrawing groups or both, such systems also have been stabilized by peri-annulation. Although strictly spoken, these peri-annulated compounds are no longer real acenes, they have fascinating properties as well. Herein, we describe the first synthesis of a new series of peri-annulated acenes with up to 13 linearly fused rings, which is unprecedented till date. Furthermore, this new series contains perylene units connected through benzene rings along their [b,k]edges, responsible for unique absorption and emission properties
Engineering a U(1) lattice gauge theory in classical electric circuits [Research Data and Code]
No full textAbstract:
Lattice gauge theories are fundamental to such distinct fields as particle physics, condensed matter, and quantum information science. Their local symmetries enforce the charge conservation observed in the laws of physics. Impressive experimental progress has demonstrated that they can be engineered in table-top experiments using synthetic quantum systems. However, the challenges posed by the scalability of such lattice gauge simulators are pressing, thereby making the exploration of different experimental setups desirable. Here, we realize a U(1) lattice gauge theory with five matter sites and four gauge links in classical electric circuits employing nonlinear elements connecting LC oscillators. This allows for probing previously inaccessible spectral and transport properties in a multi-site system. We directly observe Gauss's law, known from electrodynamics, and the emergence of long-range interactions between massive particles in full agreement with theoretical predictions. Our work paves the way for investigations of increasingly complex gauge theories on table-top classical setups, and demonstrates the precise control of nonlinear effects within metamaterial devices.
Dataset files:
MM-DD: folders with raw data, named by date in 2021.
U1 Simulations.ipynb: Numerical simulations. Produces files for U1 Figures.ipynb too.
U1 Figures.ipynb: Data analysis for figures appearing in paper.
KiCad_U1-block/: Schematic and PCB design.
redpitaya-measurements/: Measurement scripts used with Red Pitaya.
To simply retrieve the figures of paper, use the arXiv:2108.01086 source
Proving Triptycene Homoconjugation with the Same Chromophore but Different Connectivity to the Core [Data]
No full textHomoconjugation is a phenomenon discussed for various π-systems where classical conjugation is broken by e.g. methylene units but still a stabilization by electronic communication exists. In this respect, triptycene with its rigid C3 symmetric geometry is an ideal scaffold to study this phenomenon. Although several studies based on triptycene strengthen the hypothesis of homoconjugation, in all described cases the electronic communication through space relies on different π-blades. Here, two triptycenes are presented having the exact same π-extended chromophore, but differently annulated to the bicyclic core. Both compounds were investigated by spectroscopic as well as computational means and compared with the corresponding model compound, elucidating the influence of the attachment site to the triptycene core on potential homoconjugation
Crosslinking Super Yellow to produce Super OLEDs: Crosslinking with Azides Enables Improved Performance [Data]
No full textAn increasing number of organic light-emitting diodes (OLEDs) is nowadays based on the use of polymers as the emissive material. For this material class in particular, solution-processing of the OLEDs has gained traction in both research and industry. However, in order to access multilayer material systems, orthogonal solvents must be used to prevent dissolution of previously prepared layers. The use of crosslinkers can facilitate this production method by reducing the number of orthogonal solvents needed, since insoluble networks are generated. In this work, a novel bisazide crosslinker is employed to insolubilize Super Yellow, a polyphenylene-vinylene emitter. This allows the use of an additional poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine (PTAA) electron blocking layer (EBL) from the same solvent. Devices including the blocking layer show improved efficacies compared to reference devices without the additional EBL, while also maintaining the emission spectrum. Using the upscalable technique of doctor blading, OLEDs were fabricated which showed a particularly noticeable effect of the blocking layer, with a nearly twofold increase in luminance and a 56 % increase in current efficacy