cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: Characterisation of Drug-Resistant Neuroblastoma Cell Lines
Creators: name: Aderemi, Adewale Victor
Publisher: name: University of Kent
Year: 2015

description: Resistance acquisition to chemotherapy is a major cause of treatment failure in high-risk neuroblastoma. This report focused on the use of drug-adapted neuroblastoma cell lines as pre-clinical models of acquired drug resistance. Results indicated intact cell MALDI-ToF mass spectrometry (MS) fingerprinting to be a promising technique for the authentication of drug-adapted cancer cell lines that cannot be discriminated from their parental cell lines by standard methods like short tandem repeat analysis, but further optimisation is required. MS fingerprinting and the determination of platinum drug-resistance profiles in 10 single cell-derived clonal sub-lines of the docetaxel-adapted UKF-NB-3 sub-line UKF-NB-3rDOCE10 revealed a noticeable heterogeneity. Further studies need to be performed in other cell line models and including additional anti-cancer agents to learn more about the heterogeneity in drug-resistant cancer cell populations in comparison to the respective parental cancer cell populations. Newly synthesised platinum- and palladium-based compounds displayed encouraging anti-cancer efficacy in the neuroblastoma cell line UKF-NB-3 and its sub-lines adapted to cisplatin (UKF-NB-3rCDDP1000), carboplatin (UKF-NB-3rCARBO2000), or oxaliplatin (UKF-NB-3rOXALI2000) warranting further studies in additional cell lines and animal experiments. 1H-NMR-based metabonomics characterisation of UKF-NB-3, UKF-NB-3rCDDP1000, UKF-NB-3rCARBO2000, and UKF-NB-3rOXALI2000 revealed remarkable differences and did, thus, not suggest that a certain sub-population of pre-existing cancer cells was selected during UKF-NB-3 cell adaptation to these closely related platinum drugs. Further research will have to show the variability of the resistance formation process when the same cell line is adapted to the same drug in parallel independent experiments. In conclusion, the data presented here provide initial information for the further use of drug-adapted cancer cell lines.
Sound in a system of chiral one-dimensional fermions
Creators: name: Matveev, K. A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We consider a system of one-dimensional fermions moving in one direction, such as electrons at the edge of a quantum Hall system. At sufficiently long time scales the system is brought to equilibrium by weak interactions between the particles, which conserve their total number, energy, and momentum. Time evolution of the system near equilibrium is described by hydrodynamics based on the three conservation laws. We find that the system supports three sound modes. In the low temperature limit one mode is a pure oscillation of particle density, analogous to the ordinary sound. The other two modes involve oscillations of both particle and entropy densities. In the presence of disorder, the first sound mode is strongly damped at frequencies below the momentum relaxation rate, whereas the other two modes remain weakly damped.
Elicitation of directive verbs
Creators: name: Parker, Verdena
name: Fleisher, Nicholas
name: Pycha, Anne
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2021
Subjects: subject: hup

description: Audio file VP-200506-03: Elicitation of directive verbs, including a conjugation of 'push' (-ł-chwit).
Coronal Line Forest AGN I: physical properties of the emission-line regions
Creators: name: Cerqueira-Campos, F. C.
name: Rodríguez-Ardila, A.
name: Riffell, R.
name: Marinello, M.
name: Prieto, A.
name: Dahmer-Hahn, L. G.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Coronal-Line Forest Active Galactic Nuclei (CLiF AGN) are characterized by strong high-ionization lines, which contrast to what is found in most AGNs. Here, we carry out a multiwavelength analysis aimed at understanding the physical processes in the Narrow Line Region (NLR) of these objects and unveiling if they are indeed a special class of AGN. By comparing coronal emission-line ratios we conclude that there are no differences between CLiF and non-CLiF AGNs. We derive physical conditions of the narrow line region (NLR) gas and found electron densities in the range $3.6\times$10$^{2}$ - $1.7\times$10$^{4}$ cm$^{-3}$ and temperatures of $3.7\times$10$^{3}$ - $6.3\times$10$^{4}$ K, suggesting that the ionization mechanism is associated primarily with photoionization by the AGN. We suggest a NLR dominated by matter-bounded clouds to explain the high-ionization line spectrum observed. The mass of the central black hole, derived from the stellar velocity dispersion show that most of the objects have values in the interval 10$^{7-8}$~M$\odot$. Our results imply that CLiF AGN is not a separate category of AGNs. In all optical/near-infrared emission-line properties analyzed, they represent an extension to the low/high ends of the distribution within the AGN class.
description: 30 pages, 25 figures, to be published in MNRAS
ISHBILARMONLIK MUHITINI TAKOMILLASHTIRISH SUBYEKTLARINING FAOLIYATIDA BOSHQARUV JARAYONI TAHLILI
Creators: name: Xomidov, Zohidjon
Publisher: name: Zenodo
Year: 2024

description: O‘zbekiston Respublikasi Prezidentining 2018-yil 26-apreldagi “Fermer, dehqon xo‘jaliklari va tomorqa yer egalari faoliyatini takomillashtirish bo‘yicha qo‘shimcha chora-tadbirlar to‘g‘risida” gi PQ-3680-sonli Qaroriga muvofiq tijorat banklari tomonidan qariyb 7 mingta fermer, dehqon xo‘jaliklari va tomorqa yer egalariga 2018-yilda 112,6 mlrd.so‘m miqdorida imtiyozli kreditlar berildi.
Διεθνής αναπτυξιακή συνεργασία. Απόλ τη θεωρία διεθνών σχέσεων στη σύγχρονη πρακτική. Ο ρόλος της Ελλάδας. Μια πρόταση αναπτυξιακής στραγητικής:
Creators: name: Κουροπαλάτης, Χαρίδημος Θεοδώρου
Publisher: name: Aristotle University of Thessaloniki
Year: 2009
Subjects: Διεθνής ανάπτυξη
Συνεργασία
Αναπτυξιακή βοήθεια
Εξωτερική πολιτική
Ηπια ισχύς
Ελληνική στρατηγική
International development
Cooperation
Development aid
Foreign policy
Soft power
Greek strategy

description: Διεθνής αναπτυξιακή συνεργασία είναι το πλέγμα των σχέσεων των αναπτυγμένων κρατών του κόσμου με τα λιγότερο αναπτυγμένα, με το οποίο επιδιώκεται να αναπτυχθούν τα τελευταία και να καταστούν ισότιμα – με οικονομικούς και κοινωνικούς όρους - μέλη του διεθνούς συστήματος. Η έννοια της αναπτυξιακής συνεργασίας συνδέεται τόσο με το δίκαιο, όσο και με την πολιτική θεωρία και πρακτική. Φιλοδοξία του γράφοντος είναι να εντοπίσει και να αναλύσει την εννοιολογική αυτή σύνδεση και να συνδράμει στην προσπάθεια (περαιτέρω) κατανόησης του θεσμού και της συμβολής του στην ανθρώπινη εξέλιξη. Εντός αυτού του παγκόσμιου θεωρητικού και πρακτικού εγχειρήματος η Ελλάδα μπορεί και οφείλει να διαδραματίσει πρωταγωνιστικό αναπτυξιακό ρόλο. Η Ελλάδα παρουσιάζει σημαντικές αναπτυξιακές προοπτικές σε τομείς όπως: η επιχειρηματικότητα, το περιβάλλον, η ενέργεια, η ναυτιλία. Ένας τεράστιος αριθμός Ελλήνων - εντός και εκτός συνόρων - μπορούν, μέσα από πλουραλιστικούς και αξιοκρατικούς μηχανισμούς πολιτικής, επιστημονικής και επιχειρηματικής αφύπνισης, να αξιοποιηθούν από το επίσημο ελληνικό κράτος αναδεικνύοντας την “ήπια” ισχύ της Ελλάδας, καθιστώντας την ενεργό δρώντα της Διεθνούς Ανάπτυξης.
description: International developmental cooperation is the network of the relations of the world’s developed states with the least developed ones, through which the latter are aimed at developing and becoming equivalent – in economic and social terms - members of the international system. The concept of developmental cooperation is associated with law as well as political theory and practice. The writer’s aspiration is to both detect and analyze this semantic link and conduce to the attempt of (further) comprehension of the institution and its contribution to human evolution. Within this global theoretical and practical undertaking Greece can and must play a leading developmental role. Greece presents significant developmental perspectives in fields, such as: enterpreuship, environment, energy, navigation. A tremendous number of Greeks – inside and outside of the borders - can, through a pluralistic and meritocratic mechanism of political, scientific and business arousal, be utilized by the official Greek state by showing off the “mild” force of Greece, by rendering it an active actor of the International Development.
ОЛИЙ ТАЪЛИМ ТАЛАБАЛАРИНИ ИҚТИСОДИЙ САВОДХОНЛИК ДАРАЖАЛАРИНИ РИВОЖЛАНТИРИШ
Creators: name: Абдураимов, О.
Publisher: name: Zenodo
Year: 2024

description: ушбу мақолада олий таълим талабаларида иқтисодий саводхонлик иқтисодий билим кўникмаларни шаклланиши ва ривожланиш босқичлари шу билан биргаликда талабаларда иқтисодий компетенцияларини ривожлантиришда креативлик кобилиятларини ривожланиш зарурияти шакллантирилган.
About the holographic pseudo-Goldstone boson
Creators: name: Falkowski, Adam
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Pseudo-Goldstone bosons in 4D strongly coupled theories have a dual description in terms of 5D gauge theories in warped backgrounds. We introduce systematic methods of computing the pseudo-Goldstone potential for an arbitrary warp factor in 5D. When applied to electroweak symmetry breaking, our approach clarifies the relation of physical observables to geometrical quantities in five dimensions.
description: 16 pages
Noise2Context: Context-assisted Learning 3D Thin-layer Low Dose CT Without Clean Data
Creators: name: Zhang, Zhicheng
name: Liang, Xiaokun
name: Zhao, Wei
name: Xing, Lei
Publisher: name: arXiv
Year: 2020
Subjects: subject: Image and Video Processing (eess.IV)
subject: Medical Physics (physics.med-ph)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Physical sciences

description: Computed tomography (CT) has played a vital role in medical diagnosis, assessment, and therapy planning, etc. In clinical practice, concerns about the increase of X-ray radiation exposure attract more and more attention. To lower the X-ray radiation, low-dose CT is often used in certain scenarios, while it will induce the degradation of CT image quality. In this paper, we proposed a training method that trained denoising neural networks without any paired clean data. we trained the denoising neural network to map one noise LDCT image to its two adjacent LDCT images in a singe 3D thin-layer low-dose CT scanning, simultaneously In other words, with some latent assumptions, we proposed an unsupervised loss function with the integration of the similarity between adjacent CT slices in 3D thin-layer lowdose CT to train the denoising neural network in an unsupervised manner. For 3D thin-slice CT scanning, the proposed virtual supervised loss function was equivalent to a supervised loss function with paired noisy and clean samples when the noise in the different slices from a single scan was uncorrelated and zero-mean. Further experiments on Mayo LDCT dataset and a realistic pig head were carried out and demonstrated superior performance over existing unsupervised methods.
title: Evaluation von ergänzendem Einsatz von virtuellem Hands-On Training in der Hochschullehre
Creators: name: Querl, Patrick
name: Berkaoui, Djamel
name: Chandra, Raymond Leonardo
name: Castermans, Koen
name: Nacken, Heribert
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2024
Subjects: subject: Virtuelle Realität
subject: Hochschullehre
subject: Education
subject: Hands-On Learning
subject: Flood Risk Management
subject: VR
subject: Selbstständiges Lernen

description: In der vorliegenden Studie wird der Einsatz von virtueller Realität (VR) in der Hochschullehre am Beispiel von Studierenden aus dem Bauingenieurwesen untersucht. Die Studie konzentriert sich auf den Aufbau einer mobilen Hochwasserschutzwand (MFPU), einer Aufgabe, die traditionell bislang durch schriftliche Anleitungen oder Videotutorials vermittelt wird. Die Autoren führten ein Experiment durch, in dem 48 Studierende in zwei Gruppen unterteilt wurden, um den Aufbau einer MFPU mithilfe von VR-Tutorials und traditionellen Lehrvideos zu erlernen. Die Wirksamkeit dieserLehrmittel wurde sowohl in Bezug auf die theoretische als auch auf die praktische Wissensvermittlung bewertet und verglichen. Darüber hinaus wurde die persönliche Wahrnehmung der Studierenden hinsichtlich der Verwendung der VR-Software evaluiert. Ein positiver Effekt auf die theoretische Wissensvermittlung ist zu beobachten, während auf praktischer Ebene weitere Studien benötigt werden.
Αναιμία διαβητικής νεφροπάθειας τύπου ΙΙ:
Creators: name: Μπαργιώτα, Τριανταφυλλένια Ιωάννη
Publisher: name: Aristotle University of Thessaloniki
Year: 2009
Subjects: Διαβήτης
Διαβητική νεφροπάθεια
Αναιμία χρονίας νόσου
Αναιμία
Εψιδίνη
Ερυθροποιητίνη
Diabetes
Diabetic nephropathy
Anemia of chronic disease
Hepcidin
Erythropoietin

description: Στους ασθενείς με σακχαρώδη διαβήτη διαπιστώνεται συχνά αναιμία με αρνητικές συνέπειες για την ποιότητα ζωής των ασθενών και για την εξέλιξη των μικροαγγειακών και μακροαγγειακών επιπλοκών του σακχαρώδη διαβήτη. Υπάρχουν ενδείξεις ότι η αναιμία επιδεινώνει την διαβητική νεφροπάθεια, την αμφιβληστροειδοπάθεια καθώς και τον καρδιαγγειακό κίνδυνο. Στους ασθενείς με διαβητική νεφροπάθεια η αναιμία είναι πιο σοβαρή και εμφανίζεται νωρίτερα από ό,τι στους μη διαβητικούς ασθενείς με χρόνια νεφρική νόσο.Σκοπός: Σκοπός αυτής της βιβλιογραφικής ανασκόπησης είναι να διερευνήσει την παθογένεια της αναιμίας των διαβητικών ασθενών, καθώς και τις πιθανές επιπτώσεις της αναιμίας στην κλινική τους πορεία. Συμπεράσματα: Η χρόνια φλεγμονή, η λευκωματινουρία, η έκπτωση της νεφρικής λειτουργίας, η μειωμένη παραγωγή ερυθροποιητίνης και η αντίσταση στη δράση της, η νευροπάθεια του αυτόνομου νευρικού συστήματος, οι μακροαγγειακές βλάβες και η φαρμακευτική αγωγή αποτελούν παράγοντες που συνεισφέρουν στην αναιμία των ασθενών με διαβήτη. Η διόρθωση της αναιμίας βελτιώνει την ποιότητα ζωής των ασθενών και ίσως επιβραδύνει την εξέλιξη των διαβητικών επιπλοκών. Ο έλεγχος του αιματοκρίτη σε τακτική βάση αποτελεί στρατηγική έγκαιρης διάγνωσης και αντιμετώπισης της αναιμίας. Ο στόχος για τη διόρθωση της αναιμίας είναι τιμή αιμοσφαιρίνης 11-12g/dl.
description: Anemia is a common condition in patients with diabetes mellitus, which adversely affects their quality of life and the progression of microvascular and macrovascular diabetic complications. There is evidence that it might contribute to the pathogenesis and progression of cardiovascular disease and aggravate diabetic nephropathy and retinopathy. In patients with diabetic nephropathy anemia occurs earlier than in nondiabetic individuals with chronic kidney disease. Aim: The aim of this literature study is to investigate the pathogenesis of anemia in diabetic patients and its consequences in clinical outcomes. Conclusions: Chronic inflammation, albuminuria, renal function impairment, erythropoietin deficiency and erythropoietin resistance, autonomic neuropathy, macrovascular complications and medications contribute to anemia in diabetes. Correction of anemia improves quality of life and might delay the progression of diabetic complications. Routine screening for anemia is essential for early detection and correction. Target hemoglobin levels are 11-12g/dl.
Triggered or Self-Regulated Star Formation within Intermediate Redshift Luminous Infrared Galaxies (I). Morphologies and Spatially Resolved Spectral Energy Distributions
Creators: name: Melbourne, J.
name: Ammons, M.
name: Wright, S. A.
name: Metevier, A.
name: Steinbring, E.
name: Max, C.
name: Koo, D. C.
name: Larkin, J. E.
name: Barczys, M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We imaged a set of 15 intermediate redshift (z~0.8) luminous infrared galaxies (LIRGs) with the Keck Laser Guide Star (LGS) AO facility. These galaxies were selected from the GOODS-S field, allowing us to combine the high spatial resolution HST optical (B, V, i, and z-bands) images with our near-infrared (K'-band) images to study the LIRG morphologies and spatially resolved spectral energy distributions (SEDs). Two thirds of the LIRGs are disk galaxies, with only one third showing some evidence for interactions, minor, or major mergers. In contrast with local LIRG disks (which are primarily barred systems), only 10% of the LIRG disks in our sample contain a prominent bar. While the optical bands tend to show significant point-like substructure, indicating distributed star formation, the AO K-band images tend to be smooth. The SEDs of the LIRGs are consistent with distributed dusty star formation, as exhibited by optical to IR colors redder than allowed by old stellar populations alone. This effect is most pronounced in the galaxy cores, possibly indicating central star formation. We also observed a set of 11 intermediate redshift comparison galaxies, selected to be non-ellipticals with apparent K-band magnitudes comparable to the LIRGs. The "normal" (non-LIRG) systems tended to have lower optical luminosity, lower stellar mass, and more irregular morphology than the LIRGs. Half of the "normal" galaxies have SEDs consistent with intermediate aged stellar populations and minimal dust. The other half show evidence for some dusty star formation, usually concentrated in their cores. Our work suggests that the LIRG disk galaxies are similar to large disk systems today, undergoing self regulated star formation, only at 10 - 20 times higher rates. (Abridged)
description: Accepted for Publication in AJ. 27 pages, 21 figures, 3 tables
Το στοίχημα του Γκαίτε: η μεταγραφή του δραματικού προσώπου της Ελένης στο Φάουστ
Creators: name: Καραγιάννη, Αγνή Λεωνίδα
Publisher: name: Aristotle University of Thessaloniki
Year: 2009
Subjects: Μεταγραφή δραματικού προσώπου
Transcription of a dramatical persona

description: Η παρούσα μεταπτυχιακή εργασία επιχειρέι-στο πλαίσιο της Δραματολογίας-να ανιχνεύσει τη διαδικασία, τα μέσα (εκφραστικά η μη) και τη δραματική σκοπιμότητα της μεταγραφής της Ελένης στο Φάουστ του Γκαίτε. Με εφόρμηση τόσο τη διαχρονική πορεία του μύθου της ηρωίδας και τις πολιτισμικές αναζητήσεις του κύκλου της Βαιμάρης, όσο και τις έννοιες εαυτός και πρόσωπο (όπως αυτές ορίζονται για τις ανάγκες της συγκεκριμένης μελέτης κατά την πρόσληψη του δραματικού της Ελένης, αναζητείται η "Θεά του προσώπου" της αμφίσημης αυτής γυναικείας μορφής η οποία τίθεται σταδιακά επί σκηνής δίπλα στον Φάουστ, μια εξίσου δισυπόστατη φύση. Η δομή της εργασίας διαμορφώνεται με βάση τα ερωτηματικά που έμμεσα προκύπτουν σε μια μεταγραφή: αρχικά, επιχειρείται μια ενδεικτική διακειμενική προσέγγιση της ηρωίδας μέχρι την τελική διαμόρφωση της από τον Γκαίτε, και στη συνέχεια αποκωσικοποιούνται κειμενικά τα ποικίλα πρόσωπα ενός εαυτού, όπως αυτά εξυπηρετούν την τελική στοχοθεσία του δραματουργού: να απενεχοποιήσει το Ωραίο και να εναρμονίσει το ήθος με την ομορφιά.
description: The present postgraduate dissertation attempts to reveal the way that Goethe transcripts the female character of Helen in Faust, in order to disculpate the ideological 'invention'of immoral beauty and conform (harmonize) her with morality. During this metaphorical and spiritual reconstruction of the heroine, Goethe uses brilliantly literature's tradition of Helen's divine and enigmatic nature (as a brief diachronic review of the heroine's myth confirms), and to this effect he employs various stylistic codes from ancient tragedy, opera and romantic poetry. The dramatical approach of Helen's persona takes place through a decoding of self and person, as these two terms are defined for the needs of this specific research.
title: Innovation in der hochschuldidaktischen Weiterbildung durch einen virtuellen Lernraum für den Einstieg in das Thema XR in der Lehre
Creators: name: Hager, Anja
name: Würdinger, Jonas
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2024
Subjects: subject: Virtueller Lernraum
subject: Hochschuldidaktische Weiterbildung
subject: Grundlagen XR
subject: Mozilla Hubs

description: Extended Reality ist eine Technologie, die in der universitären Lehre bisher nur vereinzelt aber durchaus effektiv Anwendung findet [Zw22]. Nur wenige Dozierende fühlen sich kompetent genug, dies auch selbst einzusetzen. Dabei bietet es viele Chancen, um das Lernen zukunftsorientiert und zielgruppenorientiert zu gestalten [SK20]. Mit dem virtuellen Lernraum „XR in der Hochschullehre“ möchten wir Dozierenden einen einfachen Einstieg in das Thema und ihnen bereits bei Bearbeitung der Inhalte ein authentisches Lernerlebnis bieten. Der virtuelle Onlinekurs basiert auf Mozilla Hubs und ist inzwischen auf eine eigene Instanz umgezogen. Er schafft im Bereich der hochschuldidaktischen Weiterbildung eine Innovation, da bisherige Selbstlernmaterialien überwiegend über Lernmanagementsysteme angeboten werden und man sich darin nicht direkt mit anderen Teilnehmenden austauschen kann. Der Kurs besteht aus einzelnen Lernmaterialien zu den Themen Entwicklung von XR, Barrierefreiheit und XR, Bezug zwischen Immersion und Lernen. Die Inhalte im virtuellen Raum werden in Form von Videos, H5Ps, Audios und Texten angeboten. Sie sollen aufzeigen, wie man als Lehrperson unkompliziert und ohne viel Aufwand und Budget XR-Szenarien selbst entwickeln und in die eigene Lehre integrieren kann.
Magnetization of ballistic quantum dots induced by a linear-polarized microwave field
Creators: name: Chepelianskii, A. D.
name: Shepelyansky, D. L.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: On a basis of extensive analytical and numerical studies we show that a linear-polarized microwave field creates a stationary magnetization in mesoscopic ballistic quantum dots with two-dimensional electron gas being at a thermal equilibrium. The magnetization is proportional to a number of electrons in a dot and to a microwave power. Microwave fields of moderate strength create in a one dot of few micron size a magnetization which is by few orders of magnitude larger than a magnetization produced by persistent currents. The effect is weakly dependent on temperature and can be observed with existing experimental techniques. The parallels between this effect and ratchets in asymmetric nanostructures are also discussed.
description: 10 pages, 11 figs, research at http://www.quantware.ups-tlse.fr
title: VOLT VR - eine immersive Lernumgebung für angehende Elektrofachkräfte
Creators: name: Berger, Martin
name: Keller, Thomas
name: Brucker-Kley, Elke
name: Michot, Yanick
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2024
Subjects: subject: Virtal Reality
subject: Immersives Lernen
subject: Berufsbildung

description: VOLT VR ermöglicht es angehenden Elektrofachkräften, komplexe und potenziell gefährliche praktische Berufstätigkeiten selbstständig zu erlernen und zu üben. VOLT VR ist keine einfache VR-Simulation, sondern eine Lernumgebung, deren Kern die didaktische Rahmung ist, die auf pädagogischen Konzepten einschließlich Scaffolding, Kompetenzorientierung und Gamifcation basiert. Der Lerneffekt von VOLT VR wurde in einer Langzeit-Feldstudie evaluiert, bei der die Lernenden dank VOLT VR signifikat bessere Leistungen erreichten. Die Verbreitung von VOLT VR in der beruflichen Grundbildung in der Schweiz wird derzeit eingeleitet.
Global Fluctuations in General Beta Dyson Brownian Motion
Creators: name: Bender, Martin
Publisher: name: arXiv
Year: 2006
Subjects: subject: Probability (math.PR)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We consider a system of diffusing particles on the real line in a quadratic external potential and with repulsive electrostatic interaction. The empirical measure process is known to converge weakly to a deterministic measure-valued process as the number of particles tends to infinity. Provided the initial fluctuations are small, the rescaled linear statistics of the empirical measure process converge in distribution to a Gaussian limit for sufficiently smooth test functions. We derive explicit general formulae for the mean and covariance in this central limit theorem by analyzing a partial differential equation characterizing the limiting fluctuations.
description: 23 pages
title: Theorie trifft Realexperiment – Stromkreise verstehen mit der AR-App PUMA: Spannungslabor
Creators: name: Stolzenberger, Christoph
name: Frank, Florian
name: Trefzger, Thomas
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2024
Subjects: subject: Elektrizitätslehre
subject: Augmented Reality
subject: Simulation
subject: Messwerterfassung

description: Eine Technologie, die in der Lehre immer mehr Verbreitung findet, ist Augmented Reality (AR). Nützlich für die Physik ist dabei die Möglichkeit ein reales Experiment mit einer theoretischen Modellvorstellung oder Darstellungen zu überblenden. So lässt sich eine Verbindung zwischen Modell und Realität herstellen. Die App PUMA: Spannungslabor ermöglicht diese Verknüpfung bei einfachen Stromkreisen und steht Lehrkräften kostenfrei zur Verfügung. Sie wurde in Zusammenarbeit mit Physik-Lehrkräften entwickelt und im Rahmen einer Schülerlaborstudie auf ihre Wirksamkeit hin überprüft. Die empirischen Ergebnisse geben Hinweise für eine adressatengerechte Konzeption und Implementation von AR-Apps für den Schulunterricht. Durch eine Interventionsstudie in der Unterrichtspraxis wird der Aufwand und Nutzen des Einsatzes dieser Augmented Reality-Applikation untersucht.
Φιλολογική έκδοση των ελληνόγλωσσων νεανικών ποιημάτων του Διονυσίου Σολωμού:
Creators: name: Τσιάτσιου, Ανδρομάχη Μιχαήλ
Publisher: name: Aristotle University of Thessaloniki
Year: 2009
Subjects: Σολωμός, Διονύσιος
Πολυλάς, Ι.
Αυτόγραφα
Λίνος Πολίτης
Ξανθούλα
Solomos Dionysios
Polylas I.
Edition
Handmade
Politis, Linos
Xanthoula

description: Η εργασία είναι μια φιλολογική έκδοση όλων των ελληνόγλωσσων νεανικών ποιημάτων του εθνικού μας ποιητή, Διονυσίου Σολομού. Απευθύνεται σε μια ειδική μερίδα αναγνωστών του Σολομού που έχει διαφορετικές ανάγκες αλλά και απαιτήσεις από μια σύγχρονη φιλολογική έκδοση. Περιλαμβάνει εκτενή εισαγωγή, εισάγοντας τον αναγνώστη στην πρώτη και καίρια φάση της ποιητικής δημιουργίας του ποιητή, αφού δίνονται πληροφορίες για τη ζωή, το έργο, τα ποιήματα της νεανικής περιόδου, τις επιρροές του αλλά και την παράδοση του έργου του. Περιέχει ερμηνευτικά, φιλολογικά και εκδοτικά σχόλια για όλα τα ποιήματα της περιόδου, αλλά και ένα χρήσιμο γλωσσάρι.
description: This essay is a literary edition of all the poems our national poet Dionysios Solomos wrote in the Greek language when he was young. It is adressed to a special group of Solomo's readers, a group which has got not on;y different needs but also different demands of a modern literary edition. It includes a thorough introduction which manages to introduce the reader into the first and higly important phase of his poetic creation, due to the fact that information is given on his life, his works, his youthful poems, his influences and last but not least the tradition behind his work. It also includes explanatory. literary and publishing comments on all the poems of this period as well as a useful glossary.
Origin of the Structural and Magnetic Anomaly of the Layered Compound SrFeO2: A Density Functional Investigation
Creators: name: Xiang, H. J.
name: Wei, Su-Huai
name: Whangbo, M. -H.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The structural and magnetic anomaly of the layered compound SrFeO$_{2}$ were examined by first principles density functional calculations and Monte Carlo simulations. The down-spin Fe 3$d$ electron occupies the $d_{z^2}$ level rather than the degenerate ($d_{xz}$, $d_{yz}$) levels, which explains the absence of Jahn-Teller instability, the easy ab-plane magnetic anisotropy and the observed three-dimensional (0.5, 0.5, 0.5) antiferromagnetic order. Monte Carlo simulations show that the strong inter-layer spin exchange is essential for the high Néel temperature.
description: Published version
title: Augmented Extruder; Unsichtbares sichtbar machen
Creators: name: Renaud, Theo
name: Würdinger, Jonas
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2024
Subjects: subject: Augmented Reality
subject: Hololens
subject: interaktiv
subject: Durchsicht
subject: Simulation

description: Das Projekt „Augmented Extruder" nutzt die Hololens 2 von Microsoft, um Unsichtbares sichtbar zu machen. Am Lehrstuhl für Polymere Werkstoffe der Universität Bayreuth erhalten Studierende jedes Semester eine Einführung in den lehrstuhleigenen Schaumextruder. Diese Maschine wandelt Kunststoffgranulat in aufgeschäumte Partikel um. Die Schaumextrusion ist ein geschlossener Prozess, bei dem keine beweglichen Teile der Maschine sichtbar sind. Dadurch ist es für Studierende schwierig, die komplexen Prozesse darin zu sehen und zu verstehen. Das Projekt zielt darauf ab, mittels Augmented Reality (AR) die Maschine für Studierende zugänglicher zu machen und die praktische Ausbildung zu verbessern, ohne eine tatsächliche Maschinenbenutzung notwendig zu machen. Somit können durch die Verwendung des digitalen Praktikumversuches Zeit und Ressourcen gespart und gleichzeitig die Abfallproduktion reduziert werden. Studierende durchlaufen den Maschinenteil des Praktikums mit der Hololens an einer virtuell erweiterten Version der Maschine.
Η κινητική τέχνη. Μια εκπαιδευτική προσέγγιση. (Από τη συμβατική απεικόνιση της κίνησης μέχρι τη video art):
Creators: name: Παρασκευά, Αικατερίνη Σάββα
Publisher: name: Aristotle University of Thessaloniki
Year: 2009
Subjects: Κινούμενη εικόνα
Κινητική τέχνη
Βίντεο
Ζωοτρόπιο
Φλιπ μπουκ
Stop motion animation

description: Η εργασία παρουσιάζει την πρόταση για υλοποίηση μιας εκπαιδευτικής δράσης μέσα από ένα σώμα δραστηριοτήτων, στην τάξη του νηπιαγωγείου που πραγματεύεται τις κινούμενες εικόνες μέσα στα πλαίσια μιασ διαθεματικής προσέγγισης που σθνδιάζει την εικαστική προσέγγιση με παραδοσιακά μέσα και νέες τεχνολογίες, σε μια προσπάθεια εξοικέιωσης των παιδιών με την κινούμενη εικόνα και επικοινωνία και έκφρασης του παιδιού μέσω αυτής.
description: This paper is a suggestion of an educational approach through a corpus of activities in moving images education to work alongside the nursery children. It provides familiarization with the concept of moving images via creative activities and the use of technology.
ALGUNAS FORMAS DE REDUCIR LA QUEMA DE MADERA
Creators: name: Khakimov, X.Sh.
name: Sattarov, Z.M.
name: Artykkulov, D.Dz.
name: Kuchimov, S.U.
name: Atamurodova, S.
Publisher: name: Zenodo
Year: 2024

description: El artículo muestra que la celulosa, al igual que otros materiales fibrosos, tiene algunas desventajas, la principal de las cuales es una mayor combustibilidad y una baja resistencia al fuego.
title: Von Generieren bis Implementieren – ein Workshop als erster Schritt zum Einsatz von Augmented Reality in der universitären Lehre
Creators: name: Haller, Marcella
name: Ast, Alexander
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2024
Subjects: subject: Augmented Reality
subject: Digitale Lernumgebung
subject: E-Learning
subject: Hochschuldidaktik
subject: Interaktion
subject: Objekte digitalisieren
subject: Photogrammetrie
subject: Weiterbildung

description: Das AR-Toolkit (bestehend aus den Applikationen CYCLP und ARtemis) der E-Learning Arbeitsgruppe an der Technischen Universität Darmstadt unterstützt Lehrende und Studierende dabei, digitalisierte Objekte in eine AR-Umgebung niedrigschwellig zu integrieren, um exploratives Lernen anzuregen und interaktive sowie immersive Lernerfahrungen zu ermöglichen. CYCLP als Photogrammetrie-Software ermöglicht auf einfache Weise durch Fotoaufnahmen Objekte zu digitalisieren, als 3D-Objekt in die ARKit-App ARtemis zu importieren und darzustellen. In Verbindung mit einem Lernangebot im Kurzworkshopformat rund um Augmented Reality und das AR-Toolkit bilden sie für Einsteiger:innen einen ersten, niedrigschwelligen Schritt zum Einsatz von Augmented Reality in der universitären Lehre. Die genannten Komponenten stellen zusammen ein Ökosystem dar, welches um den Reality Composer von Apple aufgebaut wurde.
Generation possibility of gamma-ray glows induced by photonuclear reactions
Creators: name: Diniz, Gabriel Sousa
name: Ferreira, Ivan Soares
name: Wada, Yuuki
name: Enoto, Teruaki
Publisher: name: arXiv
Year: 2021
Subjects: subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: FOS: Physical sciences

description: Relativistic runaway electron avalanches (RREAs) imply a large multiplication of high energy electrons (~1 MeV). Two factors are necessary for this phenomenon: a high electric field sustained over a large distance and an energetic particle to serve as a seed. The former sustains particle energies as they keep colliding and lose energy randomly, and the latter serves as a multiplication starting point that promotes avalanches. RREA is usually connected to both terrestrial gamma-ray flashes (TGFs) and gamma-ray glows (also known as Thunderstorm Ground Enhancement (TGE) when detected at ground level) as possible generation mechanism of both events, but the current knowledge does not provide a clear relationship between these events (TGF and TGE), beyond their possible common source mechanism, still as they have different characteristics. In particular, their timescales differ by several orders of magnitude. This work shows that chain reactions by TGF byproducts can continue for the timescale of gamma-ray glows and even provide energetic particles as seeds for RREAs of gamma-ray glows.
Elicitation of stress placement
Creators: name: Parker, Verdena
name: Fleisher, Nicholas
name: Pycha, Anne
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2021
Subjects: subject: hup

description: Audio files VP-200506-04 and VP-200506-05: Elicitation based on the text "Emma Frank's Method of Doctoring," told by Emma Frank in 1927 (Sapir and Golla 2001, text #25), focusing on word-level stress/prosody.
Leptonic CP violation: zero, maximal or between the two extremes
Creators: name: Farzan, Y.
name: Smirnov, A. Yu.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Discovery of the CP-violation in the lepton sector is one of the challenges of the particle physics. We search for possible principles, symmetries and phenomenological relations that can lead to particular values of the CP-violating Dirac phase, $δ$. In this connection we discuss two extreme cases: the zero phase, $δ= 0$, and the maximal CP-violation, $δ= \pm π/2$, and relate them to the peculiar pattern of the neutrino mixing. The maximal CP-violation can be related to the $ν_μ- ν_τ$ reflection symmetry. We study various aspects of this symmetry and introduce a generalized reflection symmetry that can lead to an arbitrary phase that depends on the parameter of the symmetry transformation. The generalized reflection symmetry predicts a simple relation between the Dirac and Majorana phases. We also consider the possibility of certain relations between the CP-violating phases in the quark and lepton sectors.
description: 34 pages, no figures; v3: version appeared in JHEP
title: Virtual Field Trip – Evaluation einer paläontologischen Ausstellung als immersive 360-Lernumgebung: Historische Urzeitlebewesen hautnah erleben
Creators: name: Hart, Lukas
name: Huisgen, Maximilian
name: Blume, Anna
name: Eisenlauer, Volker
name: Ertl, Bernhard
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2024
Subjects: subject: Lernmotivation
subject: Virtuelle Exkursion
subject: 360-Lernumgebung
subject: Digitales Museum

description: Durch virtuelle 360-Exkursionen können einige positive Effekte im Bildungskontext erzielt werden. Die hier dargestellte, digitalisierte Ausstellung der bayerischen Staatssammlung für Paläontologie in München wurde mit dem Ziel, das Interesse der Lernenden zu steigern sowie die Lernmotivation zu fördern, zu einer 360-Lernumgebung als Virtual Reality entwickelt. Umgesetzt wurde diese in einem Web VR Format. Der Beitrag berichtet über eine Evaluation der Umgebung mit N = 20 Bachelorstudierenden der Bildungswissenschaften. Sowohl die Aufmerksamkeit im Sinne der Lernmotivation als auch die Akzeptanz fielen positiv aus und übertrafen jeweils die Erwartungen der Teilnehmenden. Dies könnte darauf hinweisen, dass die Attraktivität eines physischen Museumsaufenthaltes mittels virtueller Erlebnisse gesteigert werden kann.
Controlling the macroscopic electrical properties of reduced graphene oxide by nanoscale writing of electronic channels
Creators: name: Kayal, Arijit
name: Gopalakrishnan, Harikrishnan
name: Bandopadhyay, Kingshuk
name: Kumar, Amit
name: Silva, S. Ravi P.
name: Mitra, J.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The allure of all carbon electronics stems from the spread in physical properties, across all its allotropes. The scheme also harbours unique challenges, like tunability of band-gap, variability of doping and defect control. Here, we explore the technique of scanning probe tip induced nanoscale reduction of graphene oxide (GO), which nucleates conducting, sp2 rich graphitic regions on the insulating GO background. Flexibility of direct writing is supplemented with control over degree of reduction and tunability of bandgap, through macroscopic control parameters. The fabricated reduced - GO channels and ensuing devices are investigated via spectroscopic, and temperature and bias dependent electrical transport and correlated with spatially resolved electronic properties, using surface potentiometry. Presence of carrier localization effects, induced by the phase-separated sp2/sp3 domains, and large local electric field fluctuations are reflected in the non-linear transport across the channels. Together the results indicate a complex transport phenomena which may be variously dominated by tunnelling, variable range hopping or activated depending on the electronic state of the material.
Long time confinement of vorticity around a stable stationary point vortex in a bounded planar domain
Creators: name: Donati, Martin
name: Iftimie, Dragos
Publisher: name: arXiv
Year: 2020
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: In this paper we consider the incompressible Euler equation in a simply-connected bounded planar domain. We study the confinement of the vorticity around a stationary point vortex. We show that the power law confinement around the center of the unit disk obtained in [2] remains true in the case of a stationary point vortex in a simply-connected bounded domain. The domain and the stationary point vortex must satisfy a condition expressed in terms of the conformal mapping from the domain to the unit disk. Explicit examples are discussed at the end.
description: Will appear in Annales de l'Institut Henri Poincar\'e C, Analyse Non Lin\'eaire
Van der Waals quintessence stars
Creators: name: Lobo, Francisco S. N.
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The van der Waals quintessence equation of state is an interesting scenario for describing the late universe, and seems to provide a solution to the puzzle of dark energy, without the presence of exotic fluids or modifications of the Friedmann equations. In this work, the construction of inhomogeneous compact spheres supported by a van der Waals equation of state is explored. These relativistic stellar configurations shall be denoted as {\it van der Waals quintessence stars}. Despite of the fact that, in a cosmological context, the van der Waals fluid is considered homogeneous, inhomogeneities may arise through gravitational instabilities. Thus, these solutions may possibly originate from density fluctuations in the cosmological background. Two specific classes of solutions, namely, gravastars and traversable wormholes are analyzed. Exact solutions are found, and their respective characteristics and physical properties are further explored.
description: 8 pages, 1 figure, Revtex4. V2: clarifying comments and references added, now 9 pages
Κοινωνικές, οικονομικές και περιβαλλοντικές επιπτώσεις του ορεινού τουρισμού στο Νομό Ευρυτανίας:
Creators: name: Τσαμαδιάς, Γεώργιος Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2009
Subjects: Κοινωνικές επιπτώσεις
Οικονομικές επιπτώσεις
Περιβάλλον
Ορεινός τουρισμός
Social impact
Economic impact
Mountainous tourism
Environment

description: Ο τουρισμός είναι ένας τρόπος γνωριμίας διαφόρων τόπων αλλά και σημαντική πηγή εσόδων για τις περιοχές όπου και αναπτύσσεται. Μία από τις σύγχρονες μορφές του είναι αυτή του ορεινού τουρισμού . Ιδιαίτερα αξιοπρόσεκτη είναι η παρουσία του στο νομό Ευρυτανίας, έναν κατά κύριο λόγο ορεινό νομό με όλα τα προβλήματα που προκύπτουν και μία σημαντική πηγή εσόδων γι΄ αυτόν. Η ανάπτυξη του συνοδεύεται από πλεονεκτήματα και μειονεκτήματα . Στην παρούσα έρευνα διερευνήθηκαν οι κοινωνικές , οικονομικές και περιβαλλοντικές επιπτώσεις του όταν το περιβάλλον τίθεται κάτω ακριβώς από την πίεση της τουριστικής ανάπτυξης. Ο ορεινός τουρισμός είναι η πολλά υποσχόμενη μορφή τουρισμού για το νομό Ευρυτανίας αρκεί να ληφθεί μέριμνα ώστε να ενισχυθούν τα θετικά στοιχεία του και να περιοριστούν τα αρνητικά ώστε να επιτευχθεί η αειφορία και να μειωθεί στο ελάχιστο δυνατό το περιβαλλοντικό κόστος.
description: Tourism is a way of getting to know different places but also a serious economical source for the regions that grow up. One of the modern types of tourism is the mountainous .Remarkable seems to be its existence in Euritania ,a mainly mountainous region, with all the problems caused of this situation but also a serious source of income . The tourist advancement goes with advantages and disadvantages. At this investigation were examined the social, economical and environmental consequences of tourism ,when the environment is under the pressure of tourist development. Mountainous tourism is the form of tourism that gives many promises for the future of Euritania provided that the state will take care of the positive points in order to bring the negative ones under control in aim to succed duration and the reduction of the environmental cost as far as possible.
Integrals of Motion in Time-periodic Hamiltonian Systems: The Case of the Mathieu Equation
Creators: name: Tzemos, Athanasios C.
name: Contopoulos, George
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mathematical Physics (math-ph)
subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: We present an algorithm for constructing analytically approximate integrals of motion in simple time periodic Hamiltonians of the form $H=H_0+ \varepsilon H_i$, where $\varepsilon$ is a perturbation parameter. We apply our algorithm in a Hamiltonian system whose dynamics is governed by the Mathieu equation and examine in detail the orbits and their stroboscopic invariant curves for different values of $\varepsilon$. We find the values of $\varepsilon_{crit}$ beyond which the orbits escape to infinity and construct integrals which are expressed as series in the perturbation $\varepsilon$ and converge up to $\varepsilon_{crit}$. In the absence of resonances the invariant curves are concentric ellipses which are approximated very well by our integrals. Finally we construct an integral of motion which describes the hyperbolic stroboscopic invariant curve of a resonant case.
description: 15 figures
MPEC 2024-T204 : 2024 TS6
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2024
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2024 TS6

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
L-ribulose-5-phosphate 4-epimerase: epimerisation through carbon-carbon bond cleavage
Creators: name: Johnson, Anne Elizabeth
Publisher: name: University of British Columbia
Year: 2009

description: L-Ribulose-5-phosphate 4-epimerase, a bacterial enzyme which catalyses the final step in L-arabinose metabolism, interconverts L-ribulose-5-phosphate and D-xylulose-5-phosphate independently of NAD+. The labile stereocentre does not bear an acidic proton; therefore, a simple deprotonation-reprotonation mechanism cannot be followed. The epimerase was cloned from Escherichia coli into a highly efficient overexpression vector. The recombinant enzyme was found to contain a mixture of divalent zinc, manganese and copper ions. A preparation of a homogeneous sample of the Zn²+ form of the recombinant enzyme displayed kinetic constants similar to those of the naturally abundant epimerase from E. coli. Amino acid sequence similarity between the epimerase and the Class II L-fuculose-1- phosphate aldolase suggests that these two enzymes may be evolutionarily related and that the epimerisation, which is metal-dependent, may occur through carbon-carbon bond cleavage and reformation. Three conserved residues (H95, H97 and D76) which are thought to be the metal ion ligands in the epimerase have been independently altered by site directed mutagenesis to asparagine. The resulting mutant epimerases exhibit low kcat values. The H95N and H97N epimerases have a reduced affinity for Zn²+ and lose metal readily, while the D76N epimerase which has an affinity for Zn²+ comparable to that of the wild type epimerase loses metal upon extended dialysis. These observations serve to establish a structural link between the active sites of the epimerase and the aldolase. The H97N epimerase was found capable of catalysing the aldol addition between dihydroxyacetone and glycolaldehyde phosphate (the unbound forms of the proposed reaction intermediates) to form an equilibrium mixture of L-ribulose-5-phosphate and Dxylulose- 5-phosphate. In addition, the epimerase was able to release dihydroxyacetone from an equiHbrating pool of L-ribulose-5-phosphate and D-xylulose-5-phosphate. These observations of aldolase activity establish that the active site of the epimerase is capable of catalysing carbon-carbon bond cleavage, and support the notion that the epimerase and the aldolase are evolutionarily related. Glycolaldehyde phosphate was shown to be a competitive inhibitor of the H97N enzyme with a KI of 0.37 mM. The wild type enzyme was not significantly inhibited at 5 mM. The H97N mutation appears to have created a "leaky" epimerase which can bind to the normal reaction intermediates and generate them from the unbound aldol cleavage products. [Scientific formulae used in this abstract could not be reproduced.]
Decoding sequential vs non-sequential two-photon double ionization of helium using nuclear recoil
Creators: name: Horner, D. A.
name: Rescigno, T. N.
name: McCurdy, C. W.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Above 54.4 eV, two-photon double ionization of helium is dominated by a sequential absorption process, producing characteristic behavior in the single and triple differential cross sections. We show that the signature of this process is visible in the nuclear recoil cross section, integrated over all energy sharings of the ejected electrons, even below the threshold for the sequential process. Since nuclear recoil momentum imaging does not require coincident photoelectron measurement, the predicted images present a viable target for future experiments with new short-pulse VUV and soft X-ray sources.
description: 4 pages, 3 figures