Bestimmung des Eisens, Cyans, Cyanwasserstoffs und Schwefelcyanwasserstoffs durch volumenometrische Analyse

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Impact of pump wavelength on terahertz emission of a cavity-enhanced spintronic trilayer

This is the final version. Available on open access from AIP Publishing via the DOI in this recordWe systematically study the pump-wavelength dependence of terahertz pulse generation in thin-film spintronic THz emitters composed of a ferromagnetic Fe layer between adjacent nonmagnetic W and Pt layers. We find that the efficiency of THz generation is essentially at for excitation by 150 fs pulses with center wavelengths ranging from 900 to 1500 nm, demonstrating that the spin current does not depend strongly on the pump photon energy. We show that the inclusion of dielectric overlayers of TiO2 and SiO2, designed for a particular excitation wavelength, can enhance the terahertz emission by a factor of of up to two in field.The authors like to acknowledge support via the EPSRC Centre for Doctoral Training in Metamaterials (Grant No. EP/L015331/1). EH acknowledges support from EPSRC fellowship (EP/K041215/1). TK, TSS, MK and GJ acknowledge the German Research Foundation for funding through the collaborative research centers SFB TRR 227 Ultrafast spin dynamics (project B02) and SFB TRR 173 Spin+X as well as the Graduate School of Excellence Materials Science in Mainz (MAINZ, GSC 266). TK also acknowledges funding through the ERC H2020 CoG project TERAMAG/Grant No. 681917

A Comparison of Design Methodologies for Journal Bearings under Pulsatile Loads

The paper expands the work by Kinnear and Weston[1] on squeeze film bearing design to the general case and compares the revised methodology with classical bearing design[2,3,4] and hybrid bearing design[5]. The analysis, which employs a partial differentiation of the Poisseuille and Hagen-Poiseuille bearing flow equations, enables a mathematical model for the bearing squeeze film to be developed. This yields a transfer function between bearing displacement and load. Subsequent parameter maps are developed from the transfer function for stiffness and damping coefficients.The method enables hybrid journal bearings under pulsatile load to be considered. Current design methodologies employed do not cater for this situation adequately which limits effective design of these bearings in applications such as in internal combustion engine crankshaft bearings

Die Lufteisenbahn und ihre praktische Unzulänglichkeit : ein unparteiisches Urtheil

worin eine gründliche Analyse der von den Herren Samuda und Pim angestellten Versuche enthalten ist, als kritische Beleuchtung des von Herrn Mallet im Auftrage der franz. Regierung erstatteten Berichtes, von J. Herapath(VLID)380639

XI.?On the general characters of the iodo-sulphates of the cinchona-alkaloids

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