Search Results - (Author, Cooperation:J. Rothman)
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1Latest Papers from Table of Contents or Articles in PressW. F. Laurance ; D. C. Useche ; J. Rendeiro ; M. Kalka ; C. J. Bradshaw ; S. P. Sloan ; S. G. Laurance ; M. Campbell ; K. Abernethy ; P. Alvarez ; V. Arroyo-Rodriguez ; P. Ashton ; J. Benitez-Malvido ; A. Blom ; K. S. Bobo ; C. H. Cannon ; M. Cao ; R. Carroll ; C. Chapman ; R. Coates ; M. Cords ; F. Danielsen ; B. De Dijn ; E. Dinerstein ; M. A. Donnelly ; D. Edwards ; F. Edwards ; N. Farwig ; P. Fashing ; P. M. Forget ; M. Foster ; G. Gale ; D. Harris ; R. Harrison ; J. Hart ; S. Karpanty ; W. J. Kress ; J. Krishnaswamy ; W. Logsdon ; J. Lovett ; W. Magnusson ; F. Maisels ; A. R. Marshall ; D. McClearn ; D. Mudappa ; M. R. Nielsen ; R. Pearson ; N. Pitman ; J. van der Ploeg ; A. Plumptre ; J. Poulsen ; M. Quesada ; H. Rainey ; D. Robinson ; C. Roetgers ; F. Rovero ; F. Scatena ; C. Schulze ; D. Sheil ; T. Struhsaker ; J. Terborgh ; D. Thomas ; R. Timm ; J. N. Urbina-Cardona ; K. Vasudevan ; S. J. Wright ; G. J. Arias ; L. Arroyo ; M. Ashton ; P. Auzel ; D. Babaasa ; F. Babweteera ; P. Baker ; O. Banki ; M. Bass ; I. Bila-Isia ; S. Blake ; W. Brockelman ; N. Brokaw ; C. A. Bruhl ; S. Bunyavejchewin ; J. T. Chao ; J. Chave ; R. Chellam ; C. J. Clark ; J. Clavijo ; R. Congdon ; R. Corlett ; H. S. Dattaraja ; C. Dave ; G. Davies ; M. Beisiegel Bde ; N. da Silva Rde ; A. Di Fiore ; A. Diesmos ; R. Dirzo ; D. Doran-Sheehy ; M. Eaton ; L. Emmons ; A. Estrada ; C. Ewango ; L. Fedigan ; F. Feer ; B. Fruth ; J. G. Willis ; U. Goodale ; S. Goodman ; J. C. Guix ; P. Guthiga ; W. Haber ; K. Hamer ; I. Herbinger ; J. Hill ; Z. Huang ; I. F. Sun ; K. Ickes ; A. Itoh ; N. Ivanauskas ; B. Jackes ; J. Janovec ; D. Janzen ; M. Jiangming ; C. Jin ; T. Jones ; H. Justiniano ; E. Kalko ; A. Kasangaki ; T. Killeen ; H. B. King ; E. Klop ; C. Knott ; I. Kone ; E. Kudavidanage ; J. L. Ribeiro ; J. Lattke ; R. Laval ; R. Lawton ; M. Leal ; M. Leighton ; M. Lentino ; C. Leonel ; J. Lindsell ; L. Ling-Ling ; K. E. Linsenmair ; E. Losos ; A. Lugo ; J. Lwanga ; A. L. Mack ; M. Martins ; W. S. McGraw ; R. McNab ; L. Montag ; J. M. Thompson ; J. Nabe-Nielsen ; M. Nakagawa ; S. Nepal ; M. Norconk ; V. Novotny ; S. O'Donnell ; M. Opiang ; P. Ouboter ; K. Parker ; N. Parthasarathy ; K. Pisciotta ; D. Prawiradilaga ; C. Pringle ; S. Rajathurai ; U. Reichard ; G. Reinartz ; K. Renton ; G. Reynolds ; V. Reynolds ; E. Riley ; M. O. Rodel ; J. Rothman ; P. Round ; S. Sakai ; T. Sanaiotti ; T. Savini ; G. Schaab ; J. Seidensticker ; A. Siaka ; M. R. Silman ; T. B. Smith ; S. S. de Almeida ; N. Sodhi ; C. Stanford ; K. Stewart ; E. Stokes ; K. E. Stoner ; R. Sukumar ; M. Surbeck ; M. Tobler ; T. Tscharntke ; A. Turkalo ; G. Umapathy ; M. van Weerd ; J. V. Rivera ; M. Venkataraman ; L. Venn ; C. Verea ; C. V. de Castilho ; M. Waltert ; B. Wang ; D. Watts ; W. Weber ; P. West ; D. Whitacre ; K. Whitney ; D. Wilkie ; S. Williams ; D. D. Wright ; P. Wright ; L. Xiankai ; P. Yonzon ; F. Zamzani
Nature Publishing Group (NPG)
Published 2012Staff ViewPublication Date: 2012-07-27Publisher: Nature Publishing Group (NPG)Print ISSN: 0028-0836Electronic ISSN: 1476-4687Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsKeywords: Agriculture/statistics & numerical data ; Animals ; *Biodiversity ; Conservation of Natural Resources/*statistics & numerical data ; Data Collection ; Ecology/statistics & numerical data ; Endangered Species/*statistics & numerical data ; Environmental Pollution/adverse effects/statistics & numerical data ; Fires/statistics & numerical data ; Forestry/statistics & numerical data ; Interviews as Topic ; Mining/statistics & numerical data ; Population Growth ; Rain ; Reproducibility of Results ; Research Personnel ; Surveys and Questionnaires ; Temperature ; Trees/*physiology ; *Tropical ClimatePublished by: -
2Latest Papers from Table of Contents or Articles in PressStaff View
Publication Date: 2018-05-18Publisher: American Society of Hematology (ASH)Print ISSN: 0006-4971Electronic ISSN: 1528-0020Topics: BiologyMedicineKeywords: Plenary Papers, Red Cells, Iron, and Erythropoiesis, Clinical Trials and ObservationsPublished by: -
3Articles: DFG German National LicensesGardiner, S. ; Rothman, J. ; Xu, Y. B. ; Tselepi, M. ; Bland, J. A. C.
[S.l.] : American Institute of Physics (AIP)
Published 2001Staff ViewISSN: 1089-7550Source: AIP Digital ArchiveTopics: PhysicsNotes: Real time resolved scanning Kerr microscopy has been used to study the switching dynamics of 50 μm diameter epitaxial Fe(100) disks. The measurements were performed using a sinusoidal sweeping field with a sweep rate of dH/dt=10 kOe/s. By performing repetitive one-shot measurements, we have mapped the statistical fluctuations and the probability distribution of characteristic switching parameters as the switching instant t0, and the switching speed, V. We observe a substantial difference in the parameters estimated from the average of several measurements compared to the parameters extracted from the probability distributions. This illustrates the potential risks of using averaging techniques in dynamic measurements, in addition to the loss of the statistical information. The disks were found to display an inhomogeneous switching, which is believed to be caused by defect damped motion of the domain walls and a inhomogeneous distribution of defects. © 2001 American Institute of Physics.Type of Medium: Electronic ResourceURL: -
4Articles: DFG German National LicensesMoore, T. A. ; Rothman, J. ; Xu, Y. B. ; Bland, J. A. C.
[S.l.] : American Institute of Physics (AIP)
Published 2001Staff ViewISSN: 1089-7550Source: AIP Digital ArchiveTopics: PhysicsNotes: The dynamic hysteresis scaling behavior in epitaxial Fe/GaAs(001) and Fe/InAs(001) thin films (thickness range 7.3–150 Å) has been investigated as a function of Fe film thickness in the field sweep rate range 0.005–1000 kOe/s using the magneto-optic Kerr effect. The hysteresis loop area A follows the scaling relation A∝(dH/dt)α. We find two distinct dynamic regimes: the low dynamic regime in the sweep rate range 0.005–250 kOe/s, and the high dynamic regime beyond 250 kOe/s. There is a marked increase in α between the low and high dynamic regimes which we attribute to the dominant reversal mechanism changing from domain wall motion to nucleation. In the low dynamic regime α is a decreasing function of Fe film thickness, and this behavior is attributed to the effect of interface-induced pinning. © 2001 American Institute of Physics.Type of Medium: Electronic ResourceURL: -
5Articles: DFG German National LicensesRothman, J. ; Holdsworth, P. C. W. ; Bramwell, S. T.
[S.l.] : American Institute of Physics (AIP)
Published 1996Staff ViewISSN: 1089-7550Source: AIP Digital ArchiveTopics: PhysicsNotes: The magnetization of ultrathin films shows a power law dependence on temperature with an exponent β that depends on the spin anisotropy. Experimentally it is found that films with easy-axis anisotropy show β=1/8, characteristic of the two-dimensional Ising model, while those with dominant easy-plane anisotropy show β=0.23. We recently discussed the finite size magnetization of the XY model and showed that this system has universal behavior which leads to the exponent β=0.23. A number of authors have therefore interpreted their results in terms of the finite size two-dimensional XY model. The success of these explanations implies that the four- and sixfold anisotropy fields present in real films are irrelevant in determining the critical behavior of the magnetization. In the sixfold case this observation agrees with theoretical expectations, while in the fourfold case the situation is unclear, as the renormalization group analysis of José et al. shows the fourfold field to be a marginally relevant variable which gives rise to nonuniversal exponents. This theoretical result, however, pertains to the thermodynamic limit and is not necessarily relevant to real finite systems. We investigate the effect of symmetry breaking fields on the magnetic behavior of idealized finite size XY models by means of Monte Carlo simulation. We find that the fourfold field is indeed irrelevant for the system sizes of interest, and may only become relevant for system sizes beyond the physical domain. We also confirm that the sixfold field is both qualitatively and quantitatively irrelevant, and notice a number of novel features connected with the behavior of finite size models which cannot be observed in the thermodynamic limit. © 1996 American Institute of Physics.Type of Medium: Electronic ResourceURL: -
6Articles: DFG German National LicensesWallace, W. E. ; Rothman, J. B. ; Composto, R. J.
[S.l.] : American Institute of Physics (AIP)
Published 1994Staff ViewISSN: 1089-7550Source: AIP Digital ArchiveTopics: PhysicsNotes: The stopping power for hydrogen (1H)and helium (4He) in thermally imidized pyromellitic dianhydride-oxydianaline polyimide was measured using the thin-film backscattering method. As the incident energy increased from 1 to 3 MeV, the hydrogen stopping power decreased from 4.2 to 1.8 eV/(1015 atoms/cm2), whereas the helium stopping power decreased from 33.6 to 18.6 eV/(1015 atoms/cm2). These results were in excellent agreement with values predicted by either Bragg's rule or the cores-and-bonds model. This work demonstrates the advantages of using spun-cast thin (〈3 μm) polymer films supported on silicon wafers for stopping power measurements. Prior measurements of the stopping power relied on transmitting the ion beam through relatively thick (∼10 μm) free-standing films where the uncertainty in the film thickness often introduced significant systematic errors. With polymer films supported on silicon, ellipsometry can be used to accurately determine film thickness.Type of Medium: Electronic ResourceURL: -
7Articles: DFG German National LicensesLopez-Diaz, L. ; Rothman, J. ; Kläui, M. ; Bland, J. A. C.
[S.l.] : American Institute of Physics (AIP)
Published 2001Staff ViewISSN: 1089-7550Source: AIP Digital ArchiveTopics: PhysicsNotes: Hysteresis loops in mesoscopic narrow rings with cubic anisotropy have been computed. A two-step switching process is found. The first transition corresponds to vortex formation and has been studied in detail. Starting from a well defined remanent state with two opposite head-to-head walls, the vortex is created when, due to any asymmetry, one wall depins first, propagates, reaches the other and they annihilate one another. It is also found that, in this geometry, the crystallographic hard axis becomes the global easy axis due to the combined action of the magneto-crystalline anisotropy and the magnetostatic dipolar fields. © 2001 American Institute of Physics.Type of Medium: Electronic ResourceURL: -
8Articles: DFG German National LicensesKläui, M. ; Rothman, J. ; Lopez-Diaz, L. ; Vaz, C. A. F. ; Bland, J. A. C.
Woodbury, NY : American Institute of Physics (AIP)
Published 2001Staff ViewISSN: 1077-3118Source: AIP Digital ArchiveTopics: PhysicsNotes: We present a simple method to control the direction of the circulation of the magnetization in mesoscopic ring magnets, using a uniform magnetic field only. The method is based on the nucleation free switching which occurs when the rings switch from the near-saturated state, referred to as the "onion state," to the flux-closed vortex state. Two possible onion states, forward or reverse magnetized, are possible for a given direction of the magnetic field. Going from the forward or the backward onion state, both local scanning Kerr microscopy measurements and micromagnetic simulations show that the clockwise or the counterclockwise vortex state, respectively, can be selected due to asymmetric pinning of the two domain walls that are present in the onion state. © 2001 American Institute of Physics.Type of Medium: Electronic ResourceURL: -
9Articles: DFG German National LicensesStaff View
ISSN: 1420-9071Keywords: Vesicle budding and fusion ; ARF ; coat proteins ; cargo receptor ; NSF ; SNAP ; SNARESource: Springer Online Journal Archives 1860-2000Topics: BiologyMedicineNotes: Abstract A general machinery buds and fuses transport vesicles which connect intracellular compartments with each other and allow communication with the extracellular environment. Cytoplasmic coat proteins deform membranes to bud vesicles and interact directly or indirectly with cargo molecules. Compartment-specific SNAREs (SNAP receptors) on vesicles and target membranes dock vesicles and provide a scaffolding for the general fusion machinery to initiate lipid bilayer fusion.Type of Medium: Electronic ResourceURL: -
10Articles: DFG German National LicensesStaff View
ISSN: 1432-1440Keywords: Membrane Fusion ; Golgi apparatus ; Endocytosis ; Coated vesiclesSource: Springer Online Journal Archives 1860-2000Topics: MedicineNotes: Summary A combination of cell-free biochemical and morphological studies has revealed that a coated bud-coated vesicle transport system shuttles newly synthesized proteins through the successive processing compartments of the Golgi apparatus. These “Golgi coated vesicles” operate in a manner formally analogous to the clathrin coated pitcoated vesicle system responsible for receptor-mediated endocytosis; however Golgi coated vesicles do not contain clathrin.Type of Medium: Electronic ResourceURL: -
11Articles: DFG German National LicensesDeBello, W. M. ; O'Connor, V. ; Dresbach, T. ; Whiteheart, S. W. ; Wang, S. S.-H. ; Schweizer, F. E. ; Bertz, H ; Rothman, J. E. ; Augustine, G. J.
[s.l.] : Nature Publishing Group
Published 1995Staff ViewISSN: 1476-4687Source: Nature Archives 1869 - 2009Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsNotes: [Auszug] We isolated a squid complementary DNA encoding a full-length SNAP with a predicted molecular mass of 33K. This squid SNAP (s-SNAP) is 67% identical to bovine a-SNAP (Fig.1a) and 65% identical to bovine /2-SNAP (not shown), but it is only 17% identical to /-SNAP, a third, more distantly related ...Type of Medium: Electronic ResourceURL: