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1Latest Papers from Table of Contents or Articles in PressL. Chen ; M. Kostadima ; J. H. Martens ; G. Canu ; S. P. Garcia ; E. Turro ; K. Downes ; I. C. Macaulay ; E. Bielczyk-Maczynska ; S. Coe ; S. Farrow ; P. Poudel ; F. Burden ; S. B. Jansen ; W. J. Astle ; A. Attwood ; T. Bariana ; B. de Bono ; A. Breschi ; J. C. Chambers ; F. A. Choudry ; L. Clarke ; P. Coupland ; M. van der Ent ; W. N. Erber ; J. H. Jansen ; R. Favier ; M. E. Fenech ; N. Foad ; K. Freson ; C. van Geet ; K. Gomez ; R. Guigo ; D. Hampshire ; A. M. Kelly ; H. H. Kerstens ; J. S. Kooner ; M. Laffan ; C. Lentaigne ; C. Labalette ; T. Martin ; S. Meacham ; A. Mumford ; S. Nurnberg ; E. Palumbo ; B. A. van der Reijden ; D. Richardson ; S. J. Sammut ; G. Slodkowicz ; A. U. Tamuri ; L. Vasquez ; K. Voss ; S. Watt ; S. Westbury ; P. Flicek ; R. Loos ; N. Goldman ; P. Bertone ; R. J. Read ; S. Richardson ; A. Cvejic ; N. Soranzo ; W. H. Ouwehand ; H. G. Stunnenberg ; M. Frontini ; A. Rendon
American Association for the Advancement of Science (AAAS)
Published 2014Staff ViewPublication Date: 2014-09-27Publisher: American Association for the Advancement of Science (AAAS)Print ISSN: 0036-8075Electronic ISSN: 1095-9203Topics: BiologyChemistry and PharmacologyComputer ScienceMedicineNatural Sciences in GeneralPhysicsKeywords: *Alternative Splicing ; Cell Lineage/*genetics ; Genetic Variation ; Hematopoiesis/*genetics ; Hematopoietic Stem Cells/*cytology/metabolism ; Humans ; NFI Transcription Factors/genetics/metabolism ; RNA-Binding Proteins/metabolism ; Thrombopoiesis/genetics ; TranscriptomePublished by: -
2Articles: DFG German National LicensesStaff View
ISSN: 1089-7550Source: AIP Digital ArchiveTopics: PhysicsNotes: The critical current density (Jc) of two epitaxial thin films of Y1Ba2Cu3O7−δ has been measured as a function of temperature in magnetic fields up to 27 T. A detailed study of one of the films shows that when the transport current is in the a-b plane and the magnetic field is orthogonal to the c axis, the functional form of Jc is consistent with both a polynomial (flux pinning) description and an exponential (pair breaking) description. In contrast, when the current is in the a-b plane and the applied field is parallel to the c axis of the film, Jc is unambiguously exponential of the form Jc=α(T)exp[−μ0H/β(T)]. These results explain why there are conflicting suggestions in the literature as to the mechanism that determines Jc in high magnetic fields in thin films for J⊥H⊥c axis and provide evidence that pair breaking operates for J⊥ H(parallel)c axis. However, the standard phenomenological superconductor-normal-superconductor junction model derived in the clean limit for the normal metal cannot describe this pair-breaking mechanism.Type of Medium: Electronic ResourceURL: -
3Articles: DFG German National LicensesStaff View
ISSN: 1089-7550Source: AIP Digital ArchiveTopics: PhysicsType of Medium: Electronic ResourceURL: -
4Articles: DFG German National LicensesOsamura, K. ; Nonaka, S. ; Matsui, M. ; Oku, T. ; Ochiai, S. ; Hampshire, D. P.
[S.l.] : American Institute of Physics (AIP)
Published 1996Staff ViewISSN: 1089-7550Source: AIP Digital ArchiveTopics: PhysicsNotes: The microstructural factors limiting the critical current density Jc have been investigated for the silver-sheathed Bi2223 tapes prepared by the powder-in-tube technique. In a hierarchy among them, which factor is the most effective in determining Jc depends on how extensively each of them occurs. The Jc was found to increase when the volume fraction of 2223 phase increases, suggesting the importance of the connectivity among 2223 grains. The Jc also increased with decreasing amount of residual carbon. The temperature and magnetic field dependences of Jc indicated characteristics of Josephson currents through superconducting–normal–superconducting barriers. After a discussion based on the alternative current limiting mechanisms proposed up to now, it is suggested that the homophase grain boundary limits the Jc. © 1996 American Institute of Physics.Type of Medium: Electronic ResourceURL: -
5Articles: DFG German National LicensesHampshire, D. P. ; Seuntjens, J. ; Cooley, L. D. ; Larbalestier, D. C.
Woodbury, NY : American Institute of Physics (AIP)
Published 1988Staff ViewISSN: 1077-3118Source: AIP Digital ArchiveTopics: PhysicsNotes: Measurements of the transport critical current density (Jct ) of textured sintered samples of DyBa2 Cu3 O7 have been made as a function of temperature in magnetic fields up to 27 T. Data with the current orthogonal to the applied field for the high Bc2 (T) (B⊥c axis) and the low Bc2 (T) (B(parallel)c axis) orientations are presented. We report the anomalous suppression of the transport critical current when current flows along the c axis at 24 T and 4.2 K, a field which is well below Bc2 (∼100 T) at this temperature.Type of Medium: Electronic ResourceURL: -
6Articles: DFG German National LicensesStaff View
ISSN: 1089-7550Source: AIP Digital ArchiveTopics: PhysicsNotes: Detailed flux penetration measurements and the harmonic magnetic response have been measured from 4.2 K up to the critical temperature in dc fields up to 10 T for a hot isostatically pressed Chevrel-phase superconductor (Pb,Gd)Mo6S8. Good agreement is found between experimental results up to the tenth harmonic and calculations derived from a critical-state model which demonstrates that on the macroscopic scale the supercurrents flow throughout the bulk of the material. The field and temperature dependence of the critical current density shows a universal scaling behavior in agreement with Kramer's pinning law, which suggests that a single grain-boundary mechanism determines the critical current density. Complementary compositional microscopy, x-ray, resistivity, and susceptibility data are presented. When gadolinium is not incorporated into the crystal structure it acts primarily as an oxygen getter in the form Gd2S3, which enhances the density of paths of PbMo6S8 with low oxygen content and high superconducting critical parameters. When the divalent gadolinium replaces the trivalent lead to form (Pb1−xGdx)Mo6S8, it reduces the density of hole states at the Fermi energy which lowers the critical parameters, the critical current density, and the irreversibility field. © 1999 American Institute of Physics.Type of Medium: Electronic ResourceURL: -
7Articles: DFG German National LicensesLarbalestier, D. C. ; Daeumling, M. ; Cai, X. ; Seuntjens, J. ; McKinnell, J. ; Hampshire, D. ; Lee, P. ; Meingast, C. ; Willis, T. ; Muller, H. ; Ray, R. D. ; Dillenburg, R. G. ; Hellstrom, E. E. ; Joynt, R.
[S.l.] : American Institute of Physics (AIP)
Published 1987Staff ViewISSN: 1089-7550Source: AIP Digital ArchiveTopics: PhysicsNotes: Samples of YBa2Cu3O7 have been prepared with rather sharp inductive transitions having in the best cases breadths of 7 K and midpoint Tc values of 88 K. The resistive Tc midpoints are 92–95 K with transition widths of ±1–2 K. Flux shielding at 4.2 K is normally 100% and flux expulsion at 4.2 K reaches 95%. However, even small fields of order 1 mT decouple some 15%–20% of the volume, allowing flux to enter the samples. Resistive Hc2 measurements suggest that Hc2(0) varies from 〈1 to 〉300 T, depending on the criterion chosen. ac susceptibility measurements suggest that Hc2(0) is ∼60 T. Magnetization current densities are relatively high (150–200 A/mm2 at 1–10 T at 4.2 K) but measured transport current densities are small (≤1 A/mm2). Magnetization current densities at 77 K are about two orders of magnitude lower. The samples were seen to be heavily twinned by light microscopy (scale of 1–5 μm) and by transmission electron microscopy (scale of ∼250 nm). It is concluded that these measurements are consistent with a model of superconducting regions of reduced dimensionality coupled by tunneling.Type of Medium: Electronic ResourceURL: -
8Articles: DFG German National LicensesHampshire, D. P. ; Clark, A. F. ; Jones, H.
[S.l.] : American Institute of Physics (AIP)
Published 1989Staff ViewISSN: 1089-7550Source: AIP Digital ArchiveTopics: PhysicsNotes: The electric field versus current density (E-J) characteristics of a multifilamentary V3Ga wire are presented for temperatures in the range 2.5 K≤T≤Tc in magnetic fields up to 15 T. The critical current density (Jc) is determined throughout the superconducting phase for this composite. The volume pinning force (Fp=Jc×B) obeys the Fietz–Webb scaling law which is of the separable form Fp=αBnc2(T)f(b), where Bnc2(T) is a function only of temperature and f(b) is a function only of reduced field b [b=B/Bc2(T)]. In addition, two other scaling laws of this separable variable form which characterize the variation of critical current densities throughout the sample and the flux flow state are explicitly determined. It is demonstrated that similarly to NbTi and Nb3Sn, the mechanism describing dissipation above Jc must incorporate the intermittent motion of fluxons or flux bundles across the superconductor such that only a fraction (∼10−5) of the flux-line lattice is in motion.Type of Medium: Electronic ResourceURL: -
9Articles: DFG German National LicensesStaff View
ISSN: 1476-4687Source: Nature Archives 1869 - 2009Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsNotes: [Auszug] In a famous experiment, a magnet is levitated above a superconductor that has been cooled to 77 K in liquid nitrogen. Here we show that in this set-up, liquid oxygen drops form on the superconductor, drip upwards, hit the magnet and then boil. In this arrangement, oxygen (which boils at ...Type of Medium: Electronic ResourceURL: -
10Articles: DFG German National LicensesGray, K.E. ; Kampwirth, R.T. ; Miller, D.J. ; Murduck, J.M. ; Hampshire, D. ; Herzog, R. ; Weber, H.W.
Amsterdam : ElsevierStaff ViewISSN: 0921-4534Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002Topics: PhysicsType of Medium: Electronic ResourceURL: