10,706 research outputs found
Emergent spin Hall conductivity in tantalum-rhenium alloys
No full textJanus F, Yadav J, Beermann N, et al. Emergent spin Hall conductivity in tantalum-rhenium alloys. Physical Review B . 2025;111(17): 174411.We investigate the spin Hall conductivity (SHC) of a composition series of a Ta-Re bcc solid solution. At approximately 60 at.% Ta the Ta-Re alloy features a SHC similar to bcc-W, while both endpoints of the compositional series have rather moderate SHC. The intermediate stoichiometries exhibit a substantial enhancement due to Fermi-level tuning through the same band structure feature which gives bcc-W and 3-W its large SHC. We provide experimental evidence for the enhancement of the SHC in the alloy via THz emission upon ultrafast laser excitation of Ta-Re/CoFeB bilayers. We demonstrate that a rigid-band model derived from bcc-W and Fermi-level tuning describes the experimental data with a similar accuracy as the coherent-potential approximation alloy calculations of the SHC
Tu Tu Tu - Ta Ta
No full textTu tu tu - Ta ta is a five-sound pattern produced by the Afro-Latin instrument known as clave. The clave serves as a fundamental rhythmic cell, integral to every Afro-Latin and Latin American traditional genre. This pattern forms the foundation and structure of the music, guiding the arrangement and direction of all other instruments. In this project, the author metaphorically uses tu tu tu - ta ta to represent the concept of home, symbolizing the key to one\u27s inner roots and the map to one\u27s own heart. Through this metaphor, tu tu tu - ta ta is explored as the sound of home, encapsulating the essence of belonging and identity.https://remix.berklee.edu/graduate-studies-cmat/1105/thumbnail.jp
ISDN Terminal Adaptor for circuit switched data (TA-csd)
No full textOm de bestaande niet-ISDN terminals te kunnen aansluiten op het ISDN, zijn Terminal Adaptors (TA's) nodig. De TA is een apparaat dat de transmissiesnelheid van de bestaande terminal (50 tot en met 64000 bps) converteert naar de snelheid van de ISDN terminal (64000 bps). Daarnaast verzorgt TA het ISDN D-kanaal signalerings-protocol. Vooral de TA's voor circuit geschakelde datatoepassingen (TA-csd's) komen hier aan de orde. De onderwerpen zoals de functionele beschrijving van een TA-csd, de functionele architectuur van een TA-csd en de informatie uitwisselingsprocedures tussen de terminal en de TA-csd (nodig voor het opbouwen en verbreken van data-verbindingen, het instellen van parameters in de TA-csd en het uitvoeren van tests) zijn beschreven.Applied SciencesElectrotechniekAutomatische Verkeerssysteme
Sadeddin Nüzhet s Gazels and other poems
No full textSadeddin Nüzhet Ergun, edebiyat tarihçili inin müs-tesna isimlerinden biri oldu u kadar Türk edebiyat n n da önemli bir ahsiyetidir. Edebiyat tarihi alan nda yapt çal malarla k smen bilinmesine ra men müellifin, üzerinde detayl bir ekilde durulmas gereken airlik yönü de mev-cuttur.Sadeddin Nüzhet, edebiyat hayat na ö rencilik y llar nda yazd iirler ile girmesine ra men daha sonra a ama a ama bu türden uzakla m , kendisini ilmi ara t rmalara vakfetmi tir. Buna ra men Milli Mecmua, Yeni Fikir, Kervan gibi gazete ve dergilerde yay mlad , aruz ve hece ölçüleri ile kaleme ald iirleri, ahsiyetin edebi yönünün de kuvvetli oldu unu gösteren birer eser niteli i ta mak-tad r. Özellikle divan iiri etkisinde vücuda getirdi i gazel-leri; onun, gelene in son temsilcilerinden biri olarak kabul edilmesini sa lam t r.Bu çal mada Sadeddin Nüzhet in hayat ; mutasavv f, bestekâr, derleyici ve edebiyat tarihçisi kimlikleri çerçeve-sinde ele al narak incelenmi , air kimli i ve iirleri üzerin-de ayr ca durulmu tur. Eserleri hakk nda genel bir bilgi verildikten sonra tespit edilen iirler ekil ve muhteva olarak tetkik edilmi , çal man n sonunda bir bütün olarak okuyu-cuya sunulmu tur. Böylece edebiyat camias nda hak etti i de eri göremeyen Sadeddin Nüzhet in farkl bir yönüne i aret edilerek, eserlerinin divan iiri gelene i aç s ndan de eri gösterilmeye çal lm t r.Sadeddin Nüzhet Ergun is an important personality in Turkish literature as well as being one of the exceptional names of literary historiography. Despite the fact that he is partly known with his works he performed in the field of literary history, the author also has a spirit of poesy which needs to be studied in detail.Although Sadeddin Nüzhet entered the literary life with poems he wrote in his student years, later he got further away from this genre and devoted himself to scientific research. Despite this, his poems which were published in newspapers and magazines such as Milli Mecmua, Yeni Fikir, Kervan and he wrote with syllable and syllablemetrics are works of art showing that his literary character is also strong. Especially his gazels he created under the influence of divan poetry provided to be accepted him as one of the last representatives of tradition.In this works, Sadeddin Nüzhet s life was studied as part of the identity of his sufi, composer, compiler, literary historians; his poetidentity and his poems are also emphasized. After giving general information about his works, the poems that were determined were examined as form and content, presented to the reader as a whole at the end of the work. Thus, by pointing to a different as pect of Sadeddin Nüzhet, who can not see the value he deserves in the literary community, his work has been tried to be shown in terms of the divan poetry tradition
The Questions of Hermeneutic TA: Towards a Toolbox
No full textThe present chapter begins by exploring whether the project of a hermeneutic technology assessment (TA) squares well with some of TA's most fundamental presuppositions and commitments including, for instance, to provide assessments that are relevant for policymakers and can guide the shaping of emerging technologies in a responsible manner. If – as will be shown – the hermeneutic idea can be coherently established within TA, we must ask what does an understanding of emerging technologies in their guise as futuristic narratives entail? Which questions do we have to ask, to gain a better understanding of future technologies in their manifold present representations? The present chapter approaches these questions by examining the cases of nanotechnology and “Slaughterbots.” This will result in a demarcation of various dimensions and a list of questions about the origins and guise of those narratives that can be posed at other narratives of this sort. Taken together, this chapter makes some major steps towards a toolkit for applying the hermeneutic research lens to various socio-technical visions and narratives.Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Ethics & Philosophy of Technolog
Ta moko: Maori tattoo
No full textThe author examines the history, technique and meaning of ta moko (Maori tattoo) from prehistory to modern times
Did You?
No full textThis poem is a reflection on first-generation college student Tiffany Ta\u27s family heritage. The piece focuses on the author\u27s grandmother, who Ta never really got to know
Efficient spintronic THz emitters without external magnetic field
No full textKhan A, Beermann N, Sharma S, et al. Efficient spintronic THz emitters without external magnetic field. Applied Physics Letters . 2025;126(3): 032403.We investigate the performance of state-of-the-art spintronic THz emitters (W or Ta)/CoFeB/Pt with non-magnetic underlayer deposited using oblique angle deposition. The THz emission amplitude in the presence or absence of an external magnetic field remains the same and remarkably stable over time. This stability is attributed to the enhanced uniaxial magnetic anisotropy in the ferromagnetic layer, achieved by the oblique angle deposition of the underlying non-magnetic layer. Our findings could be used for the development of practical field-free emitters of linearly polarized THz radiation, potentially enabling applications in future THz technologies
Synthesis and oxidation behaviour of Ta-Al-C MAX phases
No full textMAX-phase materials, a class of ternary carbides and nitrides that combine favorable properties of metals (conductivity and toughness) and ceramics (high temperature strength) have been shown to autonomously heal micro-cracks by high temperature oxidation. The investigation of Ta and Al containing MAX phases (Ta2AlC & Ta4AlC3) could render self-healing materials at lower temperatures. Mixed (Ta2AlC and Ta4AlC3) and pure dense bulk Ta2AlC MAX phase was synthesized by spark plasma sintering (SPS) of elemental powders. The oxidation reactions of Ta-Al-C MAX phase powders were studied with differential thermal analysis (DTA). The oxidation kinetics of dense bulk Ta-Al-C MAX phase was studied by thermal gravimetric analysis (TGA). The microstructure and composition of the MAX phase materials and its oxides was characterized by X-ray diffractometry (XRD), scanning electron microscopy (SEM) with energy dispersive spectroscopy (EDS), X-ray microanalysis with electron probe microanalysis (EPMA), and X-ray photoelectron spectroscopy (XPS). Linear oxidation kinetics, inward oxide growth and formation of mainly porous Ta-oxides were observed for isothermal oxidation of dense bulk Ta2AlC and mixed MAX phase. Based on the results obtained in this work, the oxides scales formed in the 600 – 800 °C temperature range are believed to consist of various metastable and/or amorphous oxides. Full oxidation of the MAX phase above 900 °C results in the formation of Ta2O5 and ternary TaAlO4. It was found that TaAl-C MAX phases cannot self-heal microcracks by formation of a protective oxide scale at elevated temperatures.Mechanical, Maritime and Materials EngineeringMaterial Science and Engineerin
Direct numerical simulation of turbulent Taylor-Couette flow with grooved walls
No full textWe present direct numerical simulations of Taylor-Couette flow with grooved walls up to inner cylinder Reynolds number of , corresponding to Taylor number of . The simulations are performed at a fixed radius ratio . The grooves are axisymmetric V-shaped obstacles attached to the wall with a tip angle of . Results are compared with the smooth wall case in order to investigate the effects of the grooved walls. In particular, we focus on the effective scaling laws for torque, boundary layers and flow structures. With increasing , the boundary layer thickness finally becomes smaller than the groove height. When this happens, the plumes are ejected from tips of the grooves and a secondary circulation between the grooves is formed. This is associated with a sharp increase of the torque and thus the effective scaling law for the torque becomes much steeper. Further increasing does not result in an additional slope increases. Instead, the effective scaling law saturates to the same ``ultimate'' regime effective exponents seen for smooth walls
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