cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: "Venere dormiente", attribuito a Pennacchi Girolamo da Treviso II o Monogrammista HIRT-TV, inv. 030 (ITA/EN)
title: Scheda catalogo digitale Borghese
titleType: AlternativeTitle
Creators: name: MARTINI, ELISA
name: Galleria Borghese
Publisher: name: Galleria Borghese
Year: 2024

description: Pubblicazione delle schede delle opere conservate nel museo ed estratte dal catalogo digitale di Galleria Borghese, nelle due versioni esistenti online, in italiano e inglese.

Collegamento al catalogo digitale:

ITA: https://www.collezionegalleriaborghese.it/

EN: https://www.collezionegalleriaborghese.it/en
Förderung von Interesse an der "Fischschlange" – Konzeption und Evaluation eines digital geführten Mysterys zum Europäischen Aal im Fischereimuseum Bergheim an der Sieg
Creators: name: Kortendieck, Kim
Publisher: name: Zenodo
Year: 2021
Subjects: biology education
out-of-school learning
interest development research

description: Die Untersuchung analysiert die Interessenentwicklung am außerschulischen Lernort Fischereimuseum zum Thema Aal.
EXTraS discovery of a peculiar flaring X-ray source in the Galactic globular cluster NGC 6540
Creators: name: Mereghetti, Sandro
name: De Luca, Andrea
name: Salvetti, David
name: Belfiore, Andrea
name: Marelli, Martino
name: Paizis, Adamantia
name: Rigoselli, Michela
name: Salvaterra, Ruben
name: Sidoli, Lara
name: Tiengo, Andrea
Publisher: name: arXiv
Year: 2018
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We report the discovery of a flaring X-ray source in the globular cluster NGC 6540, obtained during the EXTraS project devoted to a systematic search for variability in archival data of the XMM-Newton satellite. The source had a quiescent X-ray luminosity of the order of ~10^32 erg/s in the 0.5-10 keV range (for a distance of NGC 6540 of 4 kpc) and showed a flare lasting about 300 s. During the flare, the X-ray luminosity increased by more than a factor 40, with a total emitted energy of ~10^36 erg. These properties, as well as Hubble Space Telescope photometry of the possible optical counterparts, suggest the identification with a chromospherically active binary. However, the flare luminosity is significantly higher than what commonly observed in stellar flares of such a short duration, leaving open the possibility of other interpretations.
description: To appear in Astronomy and Astrophysics
PAM-4 Transmission at 1550nm using Photonic Reservoir Computing Post-processing
Creators: name: Argyris, Apostolos
name: Bueno, Julián
name: Fischer, Ingo
Publisher: name: arXiv
Year: 2018
Subjects: subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: The efficacy of data decoding in contemporary ultrafast fiber transmission systems is greatly determined by the capabilities of the signal processing tools that are used. The received signal must not exceed a certain level of complexity, beyond which the applied signal processing solutions become insufficient or slow. Moreover, the required signal-to-noise ratio of the received signal can be challenging, especially when adopting modulation formats with multi-level encoding. Lately, photonic reservoir computing (RC) - a hardware machine learning technique with recurrent connectivity - has been proposed as a post-processing tool that deals with deterministic distortions from fiber transmission. Here we show that RC post-processing is remarkably efficient for multilevel encoding and for the use of very high launched optical peak power for fiber transmission up to 14dBm. Higher power levels provide the desired high signal-to-noise ratio (SNR) values at the receiver end, at the expense of a complex nonlinear transformation of the transmission signal. Our demonstration evaluates a direct fiber communication link with 4-level pulse amplitude modulation (PAM-4) encoding and direct detection, without including optical amplification, dispersion compensation, pulse shaping or other digital signal processing (DSP) techniques. By applying RC post-processing on the distorted signal, we numerically estimate fiber transmission distances of 27km at 56Gb/s and of 5.5 km at 112Gb/s data encoding rates, while fulfilling the hard-decision forward error correction (HD-FEC) bit-error-rate (BER) limit for data recovery. In an experimental equivalent demonstration of our photonic reservoir, the achieved distances are 21km and 4.6km respectively.
Oral history interview with Helene L. Kaplan, 2012
Publisher: name: Columbia University
Year: 2018
Subjects: Education
Endowments
Lawyers
Charitable uses, trusts, and foundations--Political activity

description: Transition from leadership of David A. Hamburg to Vartan Gregorian as president of Carnegie Corporation: impressions of David A. Hamburg, hiring of Vartan Gregorian, changes in structure and style of Carnegie Corporation, changes in board of trustees; recollections of site visits in South Africa; leadership of D. Ellen Shuman; trustee involvement in investments; Carnegie Corporation relationship with Mayor Michael R. Bloomberg; relationship with other Carnegie institutions; discussion of philanthropic programs: immigration, Islam Initiative, journalism; ideas about the future of philanthropy: role of wealth, emerging problems, trends in private and political goals of foundations; impressions of Vartan Gregorian; left and returned to board of Carnegie Corporation; goals of Vartan Gregorian; hiring of David A. Hamburg: goals of David A. Hamburg, consultations with staff; presidential search committee: leadership of James A. Johnson; women on staff of Carnegie Corporation; comparison of nonprofit and for-profit boards; change in Carnegie Corporation investment practices; connection with other Carnegie institutions; public roles of board; criticisms of Carnegie Corporation; board procedures; increased appointments since 2003; relationship between foundations and governments; discussion of elitism.
Evolution of the Women's Movement in Contemporary Algeria Organization, Objectives and Prospects
Creators: name: Bouatta, Cherifa
name: Bouatta, Cherifa
Publisher: name: Unknown
Year: 1997
Subjects: International Development

description: The paper discusses some of the social and historical factors behind the evolution of contemporary women's organizations in Algeria. The paper states that the women question was never a priority. Yet, since the late 1980s, women became advocates of their own cause. After 1991, terrorism has also perturbed the activities of women organizations. However, amidst the turbulence, the women movement appears as the most forward looking among all other civic movements and as a necessary element to build up Algeria's democratic future.
Principles and Demonstrations of Quantum Information Processing by NMR Spectroscopy
Creators: name: Havel, T. F.
name: Somaroo, S. S.
name: Tseng, C. -H.
name: Cory, D. G.
Publisher: name: arXiv
Year: 1998
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: This paper surveys our recent research on quantum information processing by nuclear magnetic resonance (NMR) spectroscopy. We begin with a geometric introduction to the NMR of an ensemble of indistinguishable spins, and then show how this geometric interpretation is contained within an algebra of multispin product operators. This algebra is used throughout the rest of the paper to demonstrate that it provides a facile framework within which to study quantum information processing more generally. The implementation of quantum algorithms by NMR depends upon the availability of special kinds of mixed states, called pseudo-pure states, and we consider a number of different methods for preparing these states, along with analyses of how they scale with the number of spins. The quantum-mechanical nature of processes involving such macroscopic pseudo-pure states also is a matter of debate, and in order to discuss this issue in concrete terms we present the results of NMR experiments which constitute a macroscopic analogue Hardy's paradox. Finally, a detailed product operator description is given of recent NMR experiments which demonstrate a three-bit quantum error correcting code, using field gradients to implement a precisely-known decoherence model.
description: LaTeX, llncs style, 42 pages, 4 postscript figures; revisions include a greatly expanded introduction to the NMR product operator formalism, and substantial changes to the discussion of the NMR analogue of Hardy's paradox. To appear in Applicable Algebra in Engineering, Communication and Computing
New Signatures of Squarks
Creators: name: Farrar, Glennys R.
Publisher: name: arXiv
Year: 1995
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: When the gluino is light and long lived, missing energy is a poor signature for both squarks and gluinos. Instead, $S_q S_q^*$ production in $e^+ e^-$ and $p \bar{p}$ collisions characteristically results in events with $\ge 4$ jets. Methods are proposed for deciding whether an observed excess of 4-jet events is due to $S_q S_q^*$ production. The recent report by ALEPH of observation of 14 4-jet events when 7 were expected is discussed.
description: 12/22/95 version (put on net 1/1/96) elaborates remarks on squarks as possible source of ALEPH 4-jet excess and adds a ref. latex, 10 pages (including 1 figure), uufiled
La compilación Hetus, otra arrasadora de mitos
Creators: name: Martín Olalla, José María
Publisher: name: Politikon
Year: 2017
Subjects: subject: HETUS
subject: Social sciences
subject: FOS: Social sciences
subject: Physical sciences
subject: FOS: Physical sciences

description: Se presentan los datos de la Encuesta Europea de Empleo del Tiempo Armonizada (HETUS) obtenida de las páginas de Statistics Sweden, ahora inaccesibles. 

Se comparan marcas de tiempo en quince países europeos.

El conjunto de datos está accesibe en Eurostat.

Publicado originalmente en Politikon el 20 de abril del año 2017. 

 

https://politikon.es/2017/04/20/la-compilacion-hetus-otra-arrasadora-de-mitos/
title: Ð Ð°ÑÑÑÑ Ð¸ Ð¼Ð¾Ð´ÐµÐ»Ð¸ÑÐ¾Ð²Ð°Ð½Ð¸Ðµ Ð¾Ð±Ð¼Ð¾ÑÐºÐ¸ Ð¼Ð°Ð³Ð½Ð¸ÑÐ° Ñ Ð¼Ð¸Ð½Ð¸Ð¼Ð¸Ð·Ð¸ÑÐ¾Ð²Ð°Ð½Ð½Ð¾Ð¹ Ð½Ð¾ÑÐ¼Ð°Ð»ÑÐ½Ð¾Ð¹ ÐºÐ¾Ð¼Ð¿Ð¾Ð½ÐµÐ½ÑÐ¾Ð¹ Ð¸Ð½Ð´ÑÐºÑÐ¸Ð¸
title: Ð²ÑÐ¿ÑÑÐºÐ½Ð°Ñ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð±Ð°ÐºÐ°Ð»Ð°Ð²ÑÐ°
titleType: Subtitle
Creators: name: Ð¡Ð¼Ð¸ÑÐ½Ð¾Ð², ÐÐ»ÐµÐºÑÐ°Ð½Ð´Ñ
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2018
Subjects: ÐºÐ²Ð°Ð·Ð¸Ð±ÐµÑÑÐ¸Ð»Ð¾Ð²Ð¾Ð¹ Ð¼Ð°Ð³Ð½Ð¸Ñ
Ð¼Ð°Ð³Ð½Ð¸ÑÐ½Ð°Ñ ÑÐ¸ÑÑÐµÐ¼Ð°
ÑÐ°Ð·ÑÐµÐ·Ð½Ð¾Ð¹ ÑÐºÑÐ°Ð½
Ð¼Ð°Ð³Ð½Ð¸ÑÐ½ÑÐµ ÑÐ¸Ð»Ñ

description: Ð Ð´Ð°Ð½Ð½Ð¾Ð¹ ÑÐ°Ð±Ð¾ÑÐµ Ð±ÑÐ»Ð¾ Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð° Ð¼Ð°Ð³Ð½Ð¸ÑÐ½Ð°Ñ ÑÐ¸ÑÑÐµÐ¼Ð°. Ð Ð°ÑÑÐ¼Ð¾ÑÑÐµÐ½Ð¾ Ð²Ð»Ð¸ÑÐ½Ð¸Ðµ ÑÐ°Ð·ÑÐµÐ·Ð½Ð¾Ð³Ð¾ ÑÐºÑÐ°Ð½Ð° Ð½Ð° ÑÐ°ÑÐ¿ÑÐµÐ´ÐµÐ»ÐµÐ½Ð¸Ðµ Ð¼Ð°Ð³Ð½Ð¸ÑÐ½Ð¾Ð³Ð¾ Ð¿Ð¾Ð»Ñ. Ð Ð°Ð·ÑÐ°Ð±Ð¾ÑÐºÐ° Ð¼ÐµÑÐ¾Ð´Ð¸ÐºÐ¸ ÑÐ½Ð¸Ð¶ÐµÐ½Ð¸Ñ Â«Ð¸Ð½ÑÐµÐ³ÑÐ°Ð»ÑÐ½Ð¾Ð³Ð¾Â» ÑÑÑÐµÐºÑÐ°. Ð¡ÑÐ°Ð²Ð½ÐµÐ½Ð¸Ðµ Ð¿Ð¾Ð»ÑÑÐµÐ½Ð½ÑÑ ÑÐºÑÐ¿ÐµÑÐ¸Ð¼ÐµÐ½ÑÐ°Ð»ÑÐ½ÑÑ Ð¸ ÑÐ°ÑÑÑÑÐ½ÑÑ Ð´Ð°Ð½Ð½ÑÑ, Ð¿Ð¾ÑÑÑÐ¾ÐµÐ½Ð¸Ðµ Ð·Ð°Ð²Ð¸ÑÐ¸Ð¼Ð¾ÑÑÐµÐ¹ Ð¿Ð¾ÑÐ¾ÐºÐ° Ð¾Ñ ÐºÐ¾Ð¾ÑÐ´Ð¸Ð½Ð°ÑÑ Ð¸ Ð¿Ð¾ÑÐ»ÐµÐ´ÑÑÑÐ¸Ðµ Ð²ÑÐ²Ð¾Ð´Ñ.
Managing Renewable Natural Capital in Africa
Creators: name: Salih, Siddig A.
name: Salih, Siddig A.
Publisher: name: Unknown
Year: 1992
Subjects: International Development

description: There is a growing evidence suggesting that the ecological degradation in Africa is accelerating faster than the region's economic decline. More seriously, trees in Sub-Saharan Africa are being felled 30 times as fast as they are being replaced; implying the highest rate of deforestation in the world. Unless this trend is slowed down, the increasing demand for woodfuel coupled with high population pressure are capable of destroying the forests in less than sixty years. Our starting point is that corporate organisation to manage common property resources are practiced by many African tribes and local communities. Such a collective action is the best available option to manage a sustainable natural capital. However, the success of this viable remedy goes beyond the means of local administration in Africa. What is needed to strengthen the managerial capabilities of these communities are biological services, sufficient international financial flows and adapted technological advances. The concluding remarks identify a practical format to share the responsibility by all concerned parties in a form of development contract between donor community and African states during the short to medium term of operation.
Cicaditrombium weni Saboori & Lazarboni 2008
Creators: name: LIU, DONG
name: YI, TIAN-CI
name: XU, YUN
name: ZHANG, ZHI-QIANG
Publisher: name: Zenodo
Year: 2013
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Acari
Trombidiidae
Cicaditrombium
Cicaditrombium weni

description: Cicaditrombium weni Saboori & Lazarboni, 2008: 53
— Holotype larva (UTKI, ARS- 20071117 -1a), ectoparasitic on Cicadatra ochreata Melichar (Homoptera: Cicadidae) on Cirsium arvensis, in Astaneh city, Markazi province, Iran (33º53'N, 49º21'E).
description: Published as part of LIU, DONG, YI, TIAN-CI, XU, YUN & ZHANG, ZHI-QIANG, 2013, Hotspots of new species discovery: new mite species described during 2007 to 2012, pp. 1-102 in Zootaxa 3663 (1) on page 52, DOI: 10.11646/zootaxa.3663.1.1, http://zenodo.org/record/5630595
Herpetocypridinae Kaufmann 1900
Creators: name: Meisch, Claude
name: Smith, Robin J.
name: Martens, Koen
Publisher: name: Zenodo
Year: 2019
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Ostracoda
Podocopida
Cyprididae

description: (9) Martens (2001) revised the taxonomy of the subfamily Herpetocypridinae Kaufmann, 1900,
 and placed the genera Parastenocypris Hartmann, 1964 and Gesa Hartmann, 1964 into the synonymy of the genus Chrissia Hartmann, 1957. Here, we also assign species of Parastenocypris and Gesa to Chrissia for which the ‘new combination’ was not expressly designated.
description: Published as part of Meisch, Claude, Smith, Robin J. & Martens, Koen, 2019, A subjective global checklist of the extant non-marine Ostracoda (Crustacea), pp. 1-135 in European Journal of Taxonomy 492 on page 5, DOI: 10.5852/ejt.2019.492, http://zenodo.org/record/3271099
A model for dark energy based on the theory of embedding
Creators: name: Kuhfittig, Peter K. F.
name: Gladney, Vance D.
Publisher: name: arXiv
Year: 2018
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: A long-standing topic of interest in the general theory of relativity is the embedding of curved spacetimes in higher-dimensional flat spacetimes. The main purpose this paper is to show that the embedding theory can account for the accelerated expansion of the Universe and thereby serve as a model for dark energy. This result is consistent with earlier findings based on noncommutative geometry. A secondary objective is to show that the embedding theory also implies that it is possible, at least in principle, for the accelerated expansion to reverse to become a deceleration.
description: 8 pages, i figure
Thrasymedes variata
Creators: name: Flynn, Dawn J.
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Membracidae
Thrasymedes
Thrasymedes variata

description: Thrasymedes variata (Fowler, 1895d: 111):
Chiriqui: (Funkhouser 1927f: 232 as Thrasymedes dubia Funkhouser: Province only).
description: Published as part of Flynn, Dawn J., 2024, Updated checklist of treehoppers of Panama (Hemiptera: Membracidae) with plant associations, pp. 1-55 in Zootaxa 5415 (1) on page 37, DOI: 10.11646/zootaxa.5415.1.1, http://zenodo.org/record/10688361
Open Science für Studierende
Creators: name: Zwicky, Regula
Publisher: name: Zenodo
Year: 2023
Subjects: Open Science
Open Access
Lizenzen
Manuskriptversionen
Nachnutzung digitaler Inhalte
Selbstarchivierung

description: Wie kann ich Aspekte von Open Science praxisorientiert in meiner Lehre thematisieren? Open Science ist ein Sammelbegriff für unterschiedliche Bestrebungen, die alle das Ziel haben, wissenschaftliche Leistungen und damit den Wissenschaftsprozess an sich, öffentlich zugänglich zu machen. Auch Studierende betrifft die Zugänglichkeit von digitalen Inhalten, wie beispielsweise, dass sie nicht auf Artikel zugreifen können, die nicht Open Access sind, oder wenn sie Bilder in Präsentationen weiterverwenden, ohne sich an die Konditionen einer Creative Commons Lizenz zu halten, oder wenn sie ihre eigenen Forschungsarbeiten oder Präsentationen selbstarchivieren möchten. Die vorliegenden Materialien können Dozierende verwenden, um Aspekte von Open Science in Lehrveranstaltungen zu thematisieren und Studierende für Open Science-Themen zu sensibilisieren. ­Basierend auf konkreten Fragen aus dem Studierendenalltag stehen thematisch gebündelt Folien zur Verfügung, die (einzeln oder kombiniert) beispielsweise in eine bestehende Präsentation einer Lehr­ver­anstal­tung eingefügt werden können. Die kurze Anwendungsübung jeweils am Schluss der Folienpakete ist dazu gedacht, die unterschiedlichen Elemente von Open Science ziel- und praxis­orien­tiert anzuwenden und anhand vorgeschlagener Fragen zu diskutieren. Anhand der Leitfragen können sich Dozierende orientieren, welcher Foliensatz in der Veranstaltung eingebunden werden soll. Zusätzlich zu den Folien stehen den Dozierenden Texte zum Vorlesen sowie weiterführende Informationen zur Verfügung, so dass sich der Vorbereitungsaufwand äusserst geringhält. Das Dokument "Dozierendeninfo" umfasst jeweils eine Übersicht zu allen relevanten Themenblöcken mit den jeweiligen Lernzielen, dem Inhalt der dazu gehörigen Folien, der Lösungen zu den Übungen sowie weiterführende Hinweise und Literatur. Die Materialien sind im Rahmen eines Teaching Tools an der Universität Zürich entwickelt worden. Die aktuell zur Verfügung stehenden Foliensätze beziehen sich vorwiegend auf Themen zu Open Access. Das Tool wird laufend ergänzt mit Foliensätzen zu weiteren Aspekten von Open Science. Folgende Themen sind bereits vorhanden: Manuskriptversionen: «Ich habe im Internet verschiedene Versionen eines Artikels gefunden. Weshalb ist das so und welches ist die «richtige» Version?» Nachnutzung digitaler Inhalte: «Ich möchte für meine Präsentation Bilder verwenden. Worauf muss ich achten und wo finde ich Bilder, die verwendet werden dürfen?» Open Access: «Was ist das und welche Vorteile bringt es? Paywall: «Weshalb gibt es Paywalls für wissenschaftliche Publikationen? Wie kann auf wissenschaftliche Publikationen zugreifen, ohne zahlen zu müssen?» Selbstarchivierung: «Was kann ich selber Open Access publizieren? Welche Plattformen eignen sich und wie gehe ich vor?»
Digital coherent control of a superconducting qubit
Creators: name: Leonard, Edward
name: Beck, Matthew A.
name: Nelson, JJ
name: Christensen, Brad G.
name: Thorbeck, Ted
name: Howington, Caleb
name: Opremcak, Alexander
name: Pechenezhskiy, Ivan V.
name: Dodge, Kenneth
name: Dupuis, Nicholas P.
name: Ku, Jaseung
name: Schlenker, Francisco
name: Suttle, Joseph
name: Wilen, Christopher
name: Zhu, Shaojiang
name: Vavilov, Maxim G.
name: Plourde, Britton L. T.
name: McDermott, Robert
Publisher: name: arXiv
Year: 2018
Subjects: subject: Quantum Physics (quant-ph)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: High-fidelity gate operations are essential to the realization of a fault-tolerant quantum computer. In addition, the physical resources required to implement gates must scale efficiently with system size. A longstanding goal of the superconducting qubit community is the tight integration of a superconducting quantum circuit with a proximal classical cryogenic control system. Here we implement coherent control of a superconducting transmon qubit using a Single Flux Quantum (SFQ) pulse driver cofabricated on the qubit chip. The pulse driver delivers trains of quantized flux pulses to the qubit through a weak capacitive coupling; coherent rotations of the qubit state are realized when the pulse-to-pulse timing is matched to a multiple of the qubit oscillation period. We measure the fidelity of SFQ-based gates to be ~95% using interleaved randomized benchmarking. Gate fidelities are limited by quasiparticle generation in the dissipative SFQ driver. We characterize the dissipative and dispersive contributions of the quasiparticle admittance and discuss mitigation strategies to suppress quasiparticle poisoning. These results open the door to integration of large-scale superconducting qubit arrays with SFQ control elements for low-latency feedback and stabilization.
description: 13 pages, 9 figures, 1 table
Noncommutative and Non-Anticommutative Quantum Field Theory
Creators: name: Moffat, J. W.
Publisher: name: arXiv
Year: 2000
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: A noncommutative and non-anticommutative quantum field theory is formulated in a superspace, in which the superspace coordinates satisfy noncommutative and non-anticommutative relations. A perturbative scalar field theory is investigated in which only the non-anticommutative algebraic structure is kept, and one loop diagrams are calculated and found to be finite due to the damping caused by a Gaussian factor in the propagator.
description: 12 pages LaTex. No figures. Revised text. Conclusions remain the same. Misprint in Eq.(31) corrected
MOESM4 of Functional characterization of a liverworts bHLH transcription factor involved in the regulation of bisbibenzyls and flavonoids biosynthesis
Creators: name: Zhao, Yu
name: Zhang, Yu-Ying
name: Liu, Hui
name: Zhang, Xiao-Shuang
name: Ni, Rong
name: Wang, Piao-Yi
name: Gao, Shuai
name: Lou, Hong-Xiang
name: Cheng, Ai-Xia
Publisher: name: figshare
Year: 2019
Subjects: subject: Biochemistry
subject: Medicine
subject: Cell Biology
subject: Molecular Biology
subject: Biotechnology
subject: Chemical Sciences not elsewhere classified
subject: Developmental Biology
subject: Cancer
subject: Plant Biology
subject: FOS: Biological sciences

description: Additional file 4: Figure S2. HPLC profiles of bibenzyls from PabHLH1 transgenic P. appendiculatum thallus (D) and the corresponding standards (A-C). (A) The internal standard is baicalein; (B) LA, Lunularic acid and RC, Riccardin C; (C) RD, Riccardin D. UV spectra of (E) LA, (G) RC, and (I) RD standard; UV spectra of the bibenzyls extracted from PabHLH1 transgenic line, LA (F), RC (H) and RD (J).
Open Science für Studierende
Creators: name: Zwicky, Regula
Publisher: name: Zenodo
Year: 2024
Subjects: Open Science
Open Access
Lizenzen
Manuskriptversionen
Nachnutzung digitaler Inhalte
Selbstarchivierung

description: Wie kann ich Aspekte von Open Science praxisorientiert in meiner Lehre thematisieren?

Open Science ist ein Sammelbegriff für unterschiedliche Bestrebungen, die alle das Ziel haben, wissenschaftliche Leistungen und damit den Wissenschaftsprozess an sich, öffentlich zugänglich zu machen. Auch Studierende betrifft die Zugänglichkeit von digitalen Inhalten, wie beispielsweise, dass sie nicht auf Artikel zugreifen können, die nicht Open Access sind, oder wenn sie Bilder in Präsentationen weiterverwenden, ohne sich an die Konditionen einer Creative Commons Lizenz zu halten, oder wenn sie ihre eigenen Forschungsarbeiten oder Präsentationen selbstarchivieren möchten.

Die vorliegenden Materialien können Dozierende verwenden, um Aspekte von Open Science in Lehrveranstaltungen zu thematisieren und Studierende für Open Science-Themen zu sensibilisieren. ­Basierend auf konkreten Fragen aus dem Studierendenalltag stehen thematisch gebündelt Folien zur Verfügung, die (einzeln oder kombiniert) beispielsweise in eine bestehende Präsentation einer Lehr­ver­anstal­tung eingefügt werden können. Die kurze Anwendungsübung jeweils am Schluss der Folienpakete ist dazu gedacht, die unterschiedlichen Elemente von Open Science ziel- und praxis­orien­tiert anzuwenden und anhand vorgeschlagener Fragen zu diskutieren.

Anhand der Leitfragen können sich Dozierende orientieren, welcher Foliensatz in der Veranstaltung eingebunden werden soll. Zusätzlich zu den Folien stehen den Dozierenden Texte zum Vorlesen sowie weiterführende Informationen zur Verfügung, so dass sich der Vorbereitungsaufwand äusserst geringhält. Das Dokument "Dozierendeninfo" umfasst jeweils eine Übersicht zu allen relevanten Themenblöcken mit den jeweiligen Lernzielen, dem Inhalt der dazu gehörigen Folien, der Lösungen zu den Übungen sowie weiterführende Hinweise und Literatur.

Die Materialien sind im Rahmen eines Teaching Tools an der Universität Zürich entwickelt worden.

Die aktuell zur Verfügung stehenden Foliensätze beziehen sich vorwiegend auf Themen zu Open Access. Das Tool wird laufend ergänzt mit Foliensätzen zu weiteren Aspekten von Open Science.

Folgende Themen sind bereits vorhanden:

Manuskriptversionen: «Ich habe im Internet verschiedene Versionen eines Artikels gefunden. Weshalb ist das so und welches ist die «richtige» Version?»

Nachnutzung digitaler Inhalte: «Ich möchte für meine Präsentation Bilder verwenden. Worauf muss ich achten und wo finde ich Bilder, die verwendet werden dürfen?»

Open Access: «Was ist das und welche Vorteile bringt es für mich?"

Paywall: «Weshalb gibt es Paywalls für wissenschaftliche Publikationen? Wie kann auf wissenschaftliche Publikationen zugreifen, ohne zahlen zu müssen?»

Selbstarchivierung: «Was kann ich selber Open Access publizieren? Welche Plattformen eignen sich und wie gehe ich vor?»
Channel Estimation for Visible Light Communications Using Neural Networks
Creators: name: Yesilkaya, Anil
name: Karatalay, Onur
name: Ogrenci, Arif Selcuk
name: Panayirci, Erdal
Publisher: name: arXiv
Year: 2018
Subjects: subject: Neural and Evolutionary Computing (cs.NE)
subject: Information Theory (cs.IT)
subject: Signal Processing (eess.SP)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Visible light communications (VLC) is an emerging field in technology and research. Estimating the channel taps is a major requirement for designing reliable communication systems. Due to the nonlinear characteristics of the VLC channel those parameters cannot be derived easily. They can be calculated by means of software simulation. In this work, a novel methodology is proposed for the prediction of channel parameters using neural networks. Measurements conducted in a controlled experimental setup are used to train neural networks for channel tap prediction. Our experiment results indicate that neural networks can be effectively trained to predict channel taps under different environmental conditions.
title: ÐÐ¾Ð´ÐµÐ»Ð¸ÑÐ¾Ð²Ð°Ð½Ð¸Ðµ ÐºÐ²Ð°Ð·Ð¸Ð±ÐµÑÑÐ¸Ð»Ð¾Ð²ÑÑ Ð¼Ð°Ð³Ð½Ð¸ÑÐ½ÑÑ ÑÐ¸ÑÑÐµÐ¼ Ñ ÐºÐ¾Ð½ÑÐµÐ½ÑÑÐ°ÑÐ¾ÑÐ°Ð¼Ð¸ Ð¿Ð¾ÑÐ¾ÐºÐ°
title: Ð²ÑÐ¿ÑÑÐºÐ½Ð°Ñ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð±Ð°ÐºÐ°Ð»Ð°Ð²ÑÐ°
titleType: Subtitle
Creators: name: ÐÐµÐ½Ð´Ð¸Ð³ÐµÐ»ÑÐ½, ÐÐ»ÐµÐ³
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2018
Subjects: ÐºÐ²Ð°Ð·Ð¸Ð±ÐµÑÑÐ¸Ð»Ð¾Ð²Ð¾Ð¹ Ð¼Ð°Ð³Ð½Ð¸Ñ
Ð¼Ð°Ð³Ð½Ð¸ÑÐ½Ð°Ñ ÑÐ¸ÑÑÐµÐ¼Ð°
ÑÐ¸Ð»ÑÐ½Ð¾Ðµ Ð¼Ð°Ð³Ð½Ð¸ÑÐ½Ð¾Ðµ Ð¿Ð¾Ð»Ðµ
ÐºÐ¾Ð½ÑÐµÐ½ÑÑÐ°ÑÐ¾Ñ Ð¿Ð¾ÑÐ¾ÐºÐ°

description: Ð Ð´Ð°Ð½Ð½Ð¾Ð¹ ÑÐ°Ð±Ð¾ÑÐµ Ð±ÑÐ»Ð¾ Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð° Ð¼Ð°Ð³Ð½Ð¸ÑÐ½Ð°Ñ ÑÐ¸ÑÑÐµÐ¼Ð° Ð³Ð¸Ð±ÑÐ¸Ð´Ð½Ð¾Ð³Ð¾ Ð¼Ð°Ð³Ð½Ð¸ÑÐ° Ñ Ð´Ð¾Ð¿Ð¾Ð»Ð½Ð¸ÑÐµÐ»ÑÐ½Ð¾Ð¹ ÑÑÐ°Ð²Ð½Ð¾Ð²ÐµÑÐµÐ½Ð½Ð¾Ð¹ Ð¾Ð±Ð¼Ð¾ÑÐºÐ¾Ð¹. Ð¢Ð°ÐºÐ¶Ðµ ÑÐ°ÑÑÐ¼Ð¾ÑÑÐµÐ½Ð¾ Ð²Ð»Ð¸ÑÐ½Ð¸Ðµ ÐºÐ¾Ð½ÑÐµÐ½ÑÑÐ°ÑÐ¾ÑÐ¾Ð² Ð¿Ð¾ÑÐ¾ÐºÐ° Ð½Ð° ÑÐ°ÑÐ¿ÑÐµÐ´ÐµÐ»ÐµÐ½Ð¸Ðµ Ð¼Ð°Ð³Ð½Ð¸ÑÐ½Ð¾Ð³Ð¾ Ð¿Ð¾Ð»Ñ. ÐÑÐ¾Ð¼Ðµ ÑÑÐ¾Ð³Ð¾ Ð¿ÑÐ¾Ð°Ð½Ð°Ð»Ð¸Ð·Ð¸ÑÐ¾Ð²Ð°Ð½Ð° Ð²Ð¾Ð·Ð¼Ð¾Ð¶Ð½Ð¾ÑÑÑ Ð¸ÑÐ¿Ð¾Ð»ÑÐ·Ð¾Ð²Ð°Ð½Ð¸Ñ Ð·ÑÐ±ÑÐ°ÑÑÑ ÐºÐ¾Ð½ÑÐµÐ½ÑÑÐ°ÑÐ¾ÑÐ¾Ð² Ð¿Ð¾ÑÐ¾ÐºÐ° Ð´Ð»Ñ ÑÑÐ°Ð²Ð½Ð¾Ð²ÐµÑÐ¸Ð²Ð°Ð½Ð¸Ñ ÑÐµÐ·ÑÐ»ÑÑÐ¸ÑÑÑÑÐµÐ¹ ÑÐ¸Ð»Ñ, Ð²Ð¾Ð·Ð½Ð¸ÐºÐ°ÑÑÐµÐ¹ Ð² Ð¾Ð±Ð»Ð°ÑÑÐ¸ Ð¾Ð±Ð¼Ð¾ÑÐºÐ¸ Ð²ÑÐ²Ð¾Ð´Ð¾Ð² â ÐºÐ¾Ð½ÑÐµÐ½ÑÑÐ°ÑÐ¾Ñ.
title: ADCO, Cartulaire général de Cîteaux, dit de Jean de Cirey, (XVe siècle), tome V, Cart. 189 (11 H 74), 316 folios, f. 0250r
Creators: name: de la Côte d'Or, Archives départementales
name: Archives Départementales De La Côte-D'Or
name: Petot, Frédérique
name: Projet CBMA
name: CG21/F.PETOT/2012
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2020
Subjects: subject: cartulaire
subject: Corpus Burgundiae Medii Aevi
subject: Chartes de la Bourgogne du Moyen Âge
subject: LaMOP
subject: Laboratoire de Médiévistique Occidentale de Paris

description: Cartulaire général de Cîteaux, dit de Jean de Cirey, (XVe siècle), tome V, Archives départementales de la Côte-d'Or, Cart. 189 (11 H 74), 316 folios, f. 0250r, Numérisation en mode image.
description: Relation: http://www.cbma-project.eu/
description: Bibliographic citation: Cartulaire général de Cîteaux, dit de Jean de Cirey, (XVe siècle), tome V, Archives départementales de la Côte-d'Or, Cart. 189 (11 H 74), 316 folios, f. 0250r, in Projet CBMA - Corpus Burgundiae Medii Aevi [Ressource en ligne], https:// manuscrits.cbma-project.eu/
description: Provenance: https://www.geonames.org/3024876
description: Provenance: http://www.idref.fr/030974844/id
description: Provenance: abbaye de Cîteaux
description: Provenance: http://www.wikidata.org/entity/Q843261
Probing the heavy Higgs mass by the measurement of the Higgs decay branching ratios in the minimal supersymmetric standard model
Creators: name: Kamoshita, J.
name: Okada, Y.
name: Tanaka, M.
Publisher: name: arXiv
Year: 1995
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We examine whether the parameters in the Higgs sector of the minimal supersymmetric standard model can be determined by detailed study of production cross section and decay branching ratios of the Higgs particle. Assuming that the lightest CP-even Higgs boson ($h$) is observed at a future $e^+ e^-$ linear collider with $\sqrt{s}=300\sim500$GeV, we show that the value of CP-odd scalar mass is determined from the ratio of the two branching ratios, $Br(h\to b\bar{b})$ and $Br(h\to c\bar{c})+Br(h\to gg)$, almost independently of the stop mass scale.
description: 12 pages, 3 figures, also available via anonymous ftp at ftp://ftp.kek.jp/kek/preprints/TH/TH-458
Open Science for students
Creators: name: Zwicky, Regula
Publisher: name: Zenodo
Year: 2024
Subjects: Open Science
Open Access
Licenses
manuscript versions
self-archiving
re-use of digital content

description: How can I raise awareness of aspects of Open Science in my courses in a student-oriented way?

Open Science is an umbrella term for various efforts that all have the goal of making scientific achievements, and thus the scientific process itself, publicly accessible. Students are also affected by the accessibility of digital content, such as, that they cannot access articles that are not open access, or if they re-use images in presentations without respecting the terms of a Creative Commons license, or if they want to self-archive their own research work or presentations.

The provided materials can be used by instructors to address aspects of Open Science in courses and to raise students' awareness of Open Science issues.

Based on concrete questions from the students' everyday life, slides are available bundled into relevant topics. The slides can be easily inserted (individually or in combination), for example, into an existing presentation.

The short exercise at the end of each slide deck is intended to address the content of the slide deck in a goal- and practice-oriented manner. Suggested questions for further discussions are also provided.

Instructors can use the guiding questions to orientate themselves as to which set of slides should be included in the course. In addition to the slides, instructors are provided with texts to read aloud as well as further information, so that the preparation effort is kept to a minimum.

The information sheet includes an overview of all relevant topic blocks with the respective learning objectives, the content of the corresponding slides, the solutions to the exercises as well as further references and literature.

 

The materials were developed in the context of a teaching tool at the University of Zurich.

New slide decks are constantly being developed. The following topics are already available: 

Manuscript versions: "I have found different versions of an article on the Internet. Why is that and which is the "correct" version?"

Re-use of digital content: "I want to use images for my presentation. What do I need to look out for and where can I find images that may be used?"

Open Access: "What is it and what are the benefits for you?"

Paywall: "Why are there paywalls for scientific publications? How can I access scientific publications without having to pay?"

Self-archiving: "What can I myself publish Open Access? Which platforms are suitable and how to do it?"
Quantum correlations are not local elements of reality
Creators: name: Cabello, Adan
Publisher: name: arXiv
Year: 1998
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: I show a situation of multiparticle entanglement which cannot be explained in the framework of an interpretation of quantum mechanics recently proposed by Mermin. This interpretation is based on the assumption that correlations between subsystems of an individual isolated composed quantum system are real objective local properties of that system.
description: REVTeX, 3 pages
Quantum and Classical Lyapunov Exponents in Atom-Field Interaction Systems
Creators: name: Chávez-Carlos, Jorge
name: López-del-Carpio, B.
name: Bastarrachea-Magnani, Miguel A.
name: Stránský, Pavel
name: Lerma-Hernández, Sergio
name: Santos, Lea F.
name: Hirsch, Jorge G.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The exponential growth of the out-of-time-ordered correlator (OTOC) has been proposed as a quantum signature of classical chaos. The growth rate is expected to coincide with the classical Lyapunov exponent. This quantum-classical correspondence has been corroborated for the kicked rotor and the stadium billiard, which are one-body chaotic systems. The conjecture has not yet been validated for realistic systems with interactions. We make progress in this direction by studying the OTOC in the Dicke model, where two-level atoms cooperatively interact with a quantized radiation field. For parameters where the model is chaotic in the classical limit, the OTOC increases exponentially in time with a rate that closely follows the classical Lyapunov exponent.
description: 6 pages, 4 figures (as published)
Oral history interview with Henry Chauncey, 1967
Publisher: name: Columbia University
Year: 2019
Subjects: Educators
Graduate Record Examination--History
Universities and colleges--Entrance examinations

description: Becoming Assistant Dean of Harvard University; first contact with William S. Learned of Carnegie Foundation for the Advancement of Teaching regarding College Entrance Board admissions exam, 1931-1932; development of National Scholarship Program at Harvard; evolution of college entrance testing, 1936-1942; Carnegie sponsorship of development of Graduate Record Examination (GRE) at Harvard and other Ivy League universities; history and establishment of the Educational Testing Service (ETS), 1937-1947; development of survey on high school education; visit to New Zealand and Australia under Carnegie Dominion and Colonies Fund to develop national college entrance exams, 1952; creation of ETS doctoral psychology fellowship program; Carnegie-sponsored education programs in South Africa and Malaya; study on mathematics education, 1953. Impressions of James Bryant Conant, William S. Learned, D.C. Josephs, Ben D. Wood.
Quantum theory of mechanical deformations
Creators: name: Stengel, Massimiliano
name: Vanderbilt, David
Publisher: name: arXiv
Year: 2018
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We construct a general metric-tensor framework for treating inhomogenous adiabatic deformations applied to crystalline insulators, by deriving an effective time-dependent Schrödinger equation in the undistorted frame. The response can be decomposed into "static" and "dynamic" terms that correspond, respectively, to the amplitude and the velocity of the distortion. We then focus on the dynamic contributon, which takes the form of a gauge field entering the effective Hamiltonian, in the linear-response limit. We uncover an intimate relation between the dynamic response to the rotational component of the inhomogeneous deformation and the diamagnetic response to a corresponding inhomogeneous magnetic field. We apply this formalism to the theory of flexoelectric response, where we resolve a previous puzzle by showing that the currents generated by the dynamic term, while real, generate no bound charges even at surfaces, and so may be dropped from a practical theory of flexoelectricity.
description: 21 pages, 2 figures
Open Science for students
Creators: name: Zwicky, Regula
Publisher: name: Zenodo
Year: 2024
Subjects: Open Science
Open Access
Licenses
manuscript versions
self-archiving
re-use of digital content

description: How can I raise awareness of aspects of Open Science in my courses in a student-oriented way?

Open Science is an umbrella term for various efforts that all have the goal of making scientific achievements, and thus the scientific process itself, publicly accessible. Students are also affected by the accessibility of digital content, such as, that they cannot access articles that are not open access, or if they re-use images in presentations without respecting the terms of a Creative Commons license, or if they want to self-archive their own research work or presentations.

The provided materials can be used by instructors to address aspects of Open Science in courses and to raise students' awareness of Open Science issues.

Based on concrete questions from the students' everyday life, slides are available bundled into relevant topics. The slides can be easily inserted (individually or in combination), for example, into an existing presentation.

The short exercise at the end of each slide deck is intended to address the content of the slide deck in a goal- and practice-oriented manner. Suggested questions for further discussions are also provided.

Instructors can use the guiding questions to orientate themselves as to which set of slides should be included in the course. In addition to the slides, instructors are provided with texts to read aloud as well as further information, so that the preparation effort is kept to a minimum.

The information sheet includes an overview of all relevant topic blocks with the respective learning objectives, the content of the corresponding slides, the solutions to the exercises as well as further references and literature.

 

The materials were developed in the context of a teaching tool at the University of Zurich.

New slide decks are constantly being developed. The following topics are already available: 

Manuscript versions: "I have found different versions of an article on the Internet. Why is that and which is the "correct" version?"

Re-use of digital content: "I want to use images for my presentation. What do I need to look out for and where can I find images that may be used?"

Open Access: "What is it and what are the benefits?

Paywall: "Why are there paywalls for scientific publications? How can I access scientific publications without having to pay?"

Self-archiving: "What can I myself publish Open Access? Which platforms are suitable and how to do it?"
Weak Radiative Decays of Hyperons and of Charm and Beauty Baryons
Creators: name: Singer, Paul
Publisher: name: arXiv
Year: 1995
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: A review is presented of the weak radiative decays of baryons.It includes an anlysis of the possible contributions of electromagnetic penguins to these decays,a survey of the difficulties still encountered in the sector of hyperon decays and a short account on some new developments on this topic. The theoretical treatments on charm and beauty baryon decays are summarized,with a good outlook for their detection.
description: 9 pages. Invited Lecture at the Conference on "Production and Decay of Hyperons, Charm and Beauty Hadrons",September 5-8,1995;Strasbourg, France
Oral history interview with Helene Kaplan, 1999
Publisher: name: Columbia University
Year: 2019
Subjects: Lawyers
Trusts and trustees
Nonprofit organizations--Management

description: Background: born 1933, Brooklyn, New York, move to Florida as adolescent; education: Barnard College, B.A., importance of women role models, New York University, LLD; career: establishment of corporate law practice, representation of wealthy individuals, foundations and nonprofits; participation in nonprofit activities and boards of trustees: Barnard College, Mount Sinai Hospital, New York Academy of Sciences, American Association for the Advancement of Science; Carnegie Corporation of New York [Carnegie]: trustee for more than two decades, reminiscences of other board members, chair of search committee for new president, hiring of David A. Hamburg, The Judicial Regulatory Committee, role as first woman to chair major private foundation, Second Inquiry on Poverty and Development in Southern Africa, visit to South Africa in 1984 and Carnegie's continued activities in South Africa; David A. Hamburg's tenure: interests in avoidance of nuclear war, conflict resolution, nexus between education and health, impact on public policy, Council on Adolescent Development; reminiscences of Carnegie presidents Alan Pifer; Vartan Gregorian; Carnegie board interaction with staff, changes in board over the years, commissions, subcommittees; foundations: questions of program evaluation, self-evaluation and accountability, government regulations, relationship with grantees, risk-taking; member of Secretary of State George P. Shultz's Commission on South Africa. There is no digital audio associated with session 3 of the interview, as tapes could not be located at the time of digitization.
Oral history interview with Isabelle Neilson, 1967
Publisher: name: Columbia University
Year: 2019
Subjects: Endowments--Officials and employees

description: Work as secretary to Alfred Zantzinger Reed during his research on legal education at Carnegie Foundation for the Advancement of Teaching; work in Carnegie Cooperative Investment Office, 1936-1939; coming to work at investment office of Carnegie Corporation; taking business courses at New York University; transferring to role as Secretary to the President under Devereux C. Josephs; decision to pursue secretarial work in lieu of further exploring investments; establishment of Russian Research Center at Harvard University; 1939-1948; working as secretary to Columbia University President Frank D. Fackenthal; Charles Dollard, 1948-1955; secretary to John W. Gardner; Carnegie’s dealings with the New York Public Library, 1955-1967. Impressions of D.C. Josephs, Herbert C. Lee, Charles Dollard, Frank Diehl Fackenthal.
Experimental Evaluation of the Interfacial Dzyaloshinskii-Moriya Interaction in Co/Ni Magnetic Multilayers
Creators: name: Lau, Derek
Publisher: name: Carnegie Mellon University
Year: 2018
Subjects: subject: 91299 Materials Engineering not elsewhere classified
subject: FOS: Materials engineering

description: In this thesis work, different approaches to engineer spin-orbit coupling phenomena has been explored experimentally because of their importance in next generation spintronic devices. The studies are focused primarily on tuning the Dzyaloshinskii-Moriya Interaction for more efficient current-induced domain wall motion in thin films composed of Co/Ni repeating magnetic layers.
 The Dzyaloshinskii-Moriya Interaction (DMI) is initially characterized for the Pt/[Co/Ni]_2.5/Ta system to develop a suitable experimental methodology for future material systems. We performed preliminary studies on the system in order to obtain the necessary texture, perpendicular anisotropy, coercivity, and film morphology. In order to characterize the interfacial DMI, we measure field-driven, asymmetric domain wall growth through the use of a Magneto-Optical Kerr Effect Microscope (MOKE). Using this technique, we are able to determine the effective field (H_DMI) generated by the interfacial DMI. This experimental characterization was significant in the development of a comprehensive model for describing domain wall behavior, used to guide the analysis of subsequent studies. Despite the ubiquitous role of alloying in developing magnetic materials, there have been few studies of its impact on DMI in heavy metal seedlayers. We used combinatorial techniques to examine a range of heavy metal alloy seedlayers. A [Co/Ni]_2.5/Ta multilayer is deposited on top of a seedlayer solid solution with a composition gradient. We have characterized the Pt−Ir system to find that the DMI changes magnitude as one moves across the composition range. A similar trend has been characterized in the Pt−Au alloyed seedlayer systems. We have demonstrated that other factors (namely chiral damping effects) not related to DMI may be contributing to domain wall motion. In addition, we have also been able to characterize the effect of seedlayer alloying on the efficiency of current-induced domain wall motion (CIDWM), which is ultimately the metric that matters for future domain wall devices. We show a correlation between DMI and device performance to demonstrate the viability of tuning device performance through seedlayer composition. Finally, we discuss preliminary results for a study to characterize the effects of capping layer interfaces on the effective DMI induced in a magnetic multilayer. There are relative magnitude differences between different heavy metal/ferromagnet (and vice versa) inter-faces, which have implications for tuning DMI by designing the magnetic multilayer structure. Continuing this study through computational and experimental work shows potential for engineering of DMI in superlattice structures or magnetic multilayers for spintronics applications.