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White, J S,Forgan, E M,Laver, M,Hä,fliger, P S,Khasanov, R,Cubitt, R,Dewhurst, C D,Park, M-S,Jang, D-J,Lee, H-G,Lee, S-I IOP Pub 2008 Journal of physics, an Institute of Physics journa Vol.20 No.10
<P>We report on the first small-angle neutron scattering measurements from the flux line lattice (FLL) in the high-<I>T</I><SUB>c</SUB> cuprate superconductor Sr<SUB>0.9</SUB>La<SUB>0.1</SUB>CuO<SUB>2</SUB>. Using a polycrystalline sample, the scattered intensity decreases monotonically with scattering angle away from the undiffracted beam, independently of the azimuthal angle around the beam. The absence of clear peaks in the intensity suggests the establishment of a highly disordered FLL within the grains. We find that the intensity distribution may be represented by the form factor for a single flux line in the London approximation, with some contribution from crystal anisotropy. Most interestingly however, we find that, over the observed field range, the temperature dependence of the diffracted intensity is best represented by s-wave pairing, with lower limits of the gap values being very similar to the Bardeen–Cooper–Schrieffer value of Δ(0) = 1.76<I> k</I><SUB>B</SUB><I>T</I><SUB>c</SUB>. However, a qualitative consideration of corrections to the observed intensity suggests that these gap values are likely to be higher, implying strong-coupling behaviour.</P>
Influence of X-Ray Beam Angulation and Exposure on Morphologic Features of Trabecular Bone
White, Stuart C.,Rudolph, David J.,Lin Ma Korean Academy of Oral Biology and the UCLA Dental 1999 International Journal of Oral Biology Vol.24 No.1
The overall goal of this project is to evaluae the use of morphologic features of oral trabecular bone on dental radiographs to identify patients with early signs of systemic bone diseases such as osteoporosis. The aim of this study was to determine whether morphologic features of trabecular bone are influenced by changes in beam angulation or image density. Three series of radiographs of the anterior region of a dried mandible were made by systematically varying the horizontal and vertical angulation of the x-ray beam (±10°in 2°increments for 11 images)as well as the exposure time (from 0.07 to 1.0 secomds for 9 images). Radiofraphs were digitized at 600 dpi and 8 bits of contrast resolution. A custom program was used to segment the trabecular bone pattern from the marrow space and then each were skeletonized. Multiple parameters were measured including the area and perimeter of trabeculae in the segmented image and the length and number of terminal and branch points in the skeletonized image. Multiple derivative measures were also computed for a total of 2 parameters. Finally, the slope of the values of each parameter plotted over the range of angulations or exposures examined was measured. Variations in the horizontal and vertical angulation of the x-ray source had no significant effect on most morphologic features of travecular bone evaluated. For both the horizontal and vertical angulation series 21 of 24 trabecular and morrow parameters were invariant to beam angulation. variations in exposure had a more pronounced influence of morphologic features. Still, 6 of the 14 trabecular and 3 of 10 marrow parameters were invariant to exposure. As many morphologic features of trabecular bone are invariant to beam angulation and image density we conclude that radiographs have the potential to serve as valuable screening tools for patients with osteoporosis.
Multiferroicity in the generic easy-plane triangular lattice antiferromagnet RbFe(MoO4)2
White, J. S.,Niedermayer, Ch.,Gasparovic, G.,Broholm, C.,Park, J. M. S.,Shapiro, A. Ya.,Demianets, L. A.,Kenzelmann, M. American Physical Society 2013 Physical review. B, Condensed matter and materials Vol.88 No.6
White, G. R.,Ainsworth, R.,Akagi, T.,Alabau-Gonzalvo, J.,Angal-Kalinin, D.,Araki, S.,Aryshev, A.,Bai, S.,Bambade, P.,Bett, D. R.,Blair, G.,Blanch, C.,Blanco, O.,Blaskovic-Kraljevic, N.,Bolzon, B.,Boog American Physical Society 2014 Physical Review Letters Vol.112 No.3
<P>A novel scheme for the focusing of high-energy leptons in future linear colliders was proposed in 2001 [P. Raimondi and A. Seryi, Phys. Rev. Lett. 86, 3779 (2001)]. This scheme has many advantageous properties over previously studied focusing schemes, including being significantly shorter for a given energy and having a significantly better energy bandwidth. Experimental results from the ATF2 accelerator at KEK are presented that validate the operating principle of such a scheme by demonstrating the demagnification of a 1.3 GeV electron beam down to below 65 nm in height using an energy-scaled version of the compact focusing optics designed for the ILC collider.</P>
Ryba-White, M.,Sakthivel, N.,Yun, C.,White, F.,Leach, J.E. Taylor Francis 2005 DNA sequence Vol.16 No.1
<P>Two new insertion sequences (IS1112 and IS1113) were identified in the genome of Xanthomonas oryzae pv. oryzae, the causal agent of bacterial blight of rice. Three copies of IS1112 were trapped, one containing 1052-bp and the other two with 1055-bp. They all have 25-bp imperfect inverted repeats with a 3-bp duplication at the site of insertion. They contain an open reading frame (ORF) of 317 and 318 amino acid residues, respectively. IS1113 is 1306-bp, contains 25-bp imperfect terminal inverted repeats, and is flanked by a 9-bp direct repeat at the site of insertion. It contains an ORF of 395 amino acid residues.</P>
Nanostructured Metal Hydrides for Hydrogen Storage
Schneemann, Andreas,White, James L.,Kang, ShinYoung,Jeong, Sohee,Wan, Liwen F.,Cho, Eun Seon,Heo, Tae Wook,Prendergast, David,Urban, Jeffrey J.,Wood, Brandon C.,Allendorf, Mark D.,Stavila, Vitalie American Chemical Society 2018 Chemical reviews Vol.118 No.22
<P>Knowledge and foundational understanding of phenomena associated with the behavior of materials at the nanoscale is one of the key scientific challenges toward a sustainable energy future. Size reduction from bulk to the nanoscale leads to a variety of exciting and anomalous phenomena due to enhanced surface-to-volume ratio, reduced transport length, and tunable nanointerfaces. Nanostructured metal hydrides are an important class of materials with significant potential for energy storage applications. Hydrogen storage in nanoscale metal hydrides has been recognized as a potentially transformative technology, and the field is now growing steadily due to the ability to tune the material properties more independently and drastically compared to those of their bulk counterparts. The numerous advantages of nanostructured metal hydrides compared to bulk include improved reversibility, altered heats of hydrogen absorption/desorption, nanointerfacial reaction pathways with faster rates, and new surface states capable of activating chemical bonds. This review aims to summarize the progress to date in the area of nanostructured metal hydrides and intends to understand and explain the underpinnings of the innovative concepts and strategies developed over the past decade to tune the thermodynamics and kinetics of hydrogen storage reactions. These recent achievements have the potential to propel further the prospects of tuning the hydride properties at nanoscale, with several promising directions and strategies that could lead to the next generation of solid-state materials for hydrogen storage applications.</P> [FIG OMISSION]</BR>
The North Ecliptic Pole Wide survey of AKARI: a near- and mid-infrared source catalog
Kim, S. J.,Lee, H. M.,Matsuhara, H.,Wada, T.,Oyabu, S.,Im, M.,Jeon, Y.,Kang, E.,Ko, J.,Lee, M. G.,Takagi, T.,Pearson, C.,White, G. J.,Jeong, W.-S.,Serjeant, S.,Nakagawa, T.,Ohyama, Y.,Goto, T.,Takeuch EDP Sciences 2012 Astronomy and astrophysics Vol.548 No.-