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Jacob R Bledsoe, Zachary S Wallace, Vikram Deshpande, Joshua R Richter, Jason Klapman, Andrew Cowan, John H Stone, Judith A Ferry
Objectives: To report the clinicopathologic features of monotypic immunoglobulin G4+ (IgG4+) lymphoid and plasmacytic proliferations. Methods: Cases were identified from the pathology files. Pathology and clinical materials were reviewed. Results: Eleven cases of monotypic IgG4+ proliferations were identified at nodal, orbital, or salivary sites. Six cases (three men, three women; age, 57-94 years) met criteria for lymphoma or plasma cell neoplasia...
September 1, 2017: American Journal of Clinical Pathology
Emilson Ribeiro Viana, Geraldo Mathias Ribeiro, Alfredo G de Oliveira, Juan Carlos Gonzalez Perez
An individual tin oxide (SnO<sub>2</sub>) nanobelt was connected in a back-gate field-effect transistor (FET) configuration and the conductivity of the nanobelt were measured at different temperatures from 400K to 4K, in darkness and under UV illumination. In darkness, the SnO<sub>2</sub> nanobelts show semiconductor behaviour for the whole temperature range measured. But when subject to UV illumination the photoinduced carriers was high enough that leads to a Metal-to-Insulator transition, near room temperature, at T<sub>MIT</sub> = 240 K...
August 18, 2017: Nanotechnology
Tetsuaki Itou, Eri Watanabe, Satoru Maegawa, Akiko Tajima, Naoya Tajima, Kazuya Kubo, Reizo Kato, Kazushi Kanoda
The Mott transition-a metal-insulator transition caused by repulsive Coulomb interactions between electrons-is a central issue in condensed matter physics because it is the mother earth of various attractive phenomena. Outstanding examples are high-Tc (critical temperature) cuprates and manganites exhibiting colossal magnetoresistance. Furthermore, spin liquid states, which are quantum-fluctuation-driven disordered ground states in antiferromagnets, have recently been found in magnetic systems very near the Mott transition...
August 2017: Science Advances
Xi-Rui Zhao, Yan-Qiang Cao, Jun Chen, Lin Zhu, Xu Qian, Ai-Dong Li, Di Wu
Co3O4-coated commercial TiO2 powders (P25) p-n junction photocatalysts were prepared by plasma-enhanced atomic layer deposition (PEALD) technique. The structure, morphology, bandgap, and photocatalytic properties under ultraviolet light were investigated systematically. Although the deposition of Co3O4 does not change the anatase structure and crystallite size of P25 powders, the ultraviolet photocatalytic activity has been improved evidently. For the Co3O4-coated P25 powders, the trace Co ions exist as Co3O4 nanoparticles attached to TiO2 powder surface instead of the occupation of Ti(4+) position in TiO2 lattice...
August 16, 2017: Nanoscale Research Letters
Hyungseob Lim, Jae Young Kim, Edward J Evans, Amritesh Rai, Jun-Hyuk Kim, Bryan R Wygant, Charles Buddie Mullins
There has been debate on whether Ni(OH)2 is truly catalytically active for the photo/-electrocatalytic oxygen evolution reaction. In this report, we have synthesized a Ni(OH)2 co-catalyst on a hematite photoanode and showed that, as has been proposed in other studies, the current density varies as a function of scan rate, which arise due to a photo-induced capacitive charging effect. We have discovered that this photo-induced charging of Ni2+/3+ can be overcome by mixing cerium nitrate into the Ni precursor solution...
August 16, 2017: ACS Applied Materials & Interfaces
Erwan Motte, Mehrez Zribi
Airborne GNSS-R campaigns are crucial to the understanding of signal interactions with the Earth's surface. As a consequence of the specific geometric configurations arising during measurements from aircraft, the reflected signals can be difficult to interpret under certain conditions like over strongly attenuating media such as forests, or when the reflected signal is contaminated by the direct signal. For these reasons, there are many cases where the reflectivity is overestimated, or a portion of the dataset has to be flagged as unusable...
August 16, 2017: Sensors
Wendy E Hoy, Susan Anne Mott, Beverly June McLeod
OBJECTIVES: To describe trends in ages and causes of death in a remote-living Australian Aboriginal group over a recent 50-year period. DESIGN: A retrospective observational study, from 1960 to 2010, of deaths and people starting dialysis, using data from local clinic, parish, dialysis and birthweight registers. SETTING: A remote island community in the Top End of Australia's Northern Territory, where a Catholic mission was established in 1911...
August 11, 2017: BMJ Open
Sarah J de la Motte, Timothy C Gribbin, Peter Lisman, Kaitlin Murphy, Patricia A Deuster
This is a systematic review and evaluation of the current evidence on the association between muscular endurance (ME) and/or muscular strength (MS) and musculoskeletal injury (MSK-I) risk in military and civilian populations. MEDLINE, EBSCO, EMBASE, and the Defense Technical Information Center were searched for original studies published from 1970 through 2015 that examined associations between physical fitness (ME and MS) and MSK-I in military or civilian populations. Methodological quality and strength of the evidence were determined following criteria adapted from previously published systematic reviews...
August 4, 2017: Journal of Strength and Conditioning Research
Suhas Kumar, John Paul Strachan, R Stanley Williams
At present, machine learning systems use simplified neuron models that lack the rich nonlinear phenomena observed in biological systems, which display spatio-temporal cooperative dynamics. There is evidence that neurons operate in a regime called the edge of chaos that may be central to complexity, learning efficiency, adaptability and analogue (non-Boolean) computation in brains. Neural networks have exhibited enhanced computational complexity when operated at the edge of chaos, and networks of chaotic elements have been proposed for solving combinatorial or global optimization problems...
August 9, 2017: Nature
A M Oje, A A Ogwu
Chromium oxide coatings prepared by radiofrequency reactive magnetron sputtering on stainless steel substrates were exposed to Ringer's physiological solution and tested for their electrochemical corrosion stability using an open circuit potential measurement, potentiodynamic polarization, electrochemical impedance spectroscopy and Mott-Schottky analysis. The coatings were found to be predominantly Cr2O3, based on the observation of the dominance of [Formula: see text] and Eg symmetric modes in our Raman spectroscopic investigation and the Eu vibrational modes in our Fourier transform infrared spectroscopic measurements on the coatings...
July 2017: Royal Society Open Science
Kathryn J Sweet, David Peak, Keith A Mott
The role of stomatal heterogeneity in the response of stomatal conductance (gs ) to the mole fraction difference in water vapor between the inside of the leaf and the ambient air (Δw) was determined using thermography and gas exchange for three species. The value of Δw for the leaf was varied in two different ways: first by varying air humidity while holding leaf temperature constant and second by varying leaf temperature while holding air humidity constant. Stomatal heterogeneity was explored by examining the response of gs in small areas of the leaf (as determined by thermography) and comparing them to each other and to the average value of gs (as determined by gas exchange)...
August 4, 2017: Plant, Cell & Environment
Jian Cheng, Jiang Xu, Lin Lin Liu, Shuyun Jiang
In order to improve the corrosion and wear resistance of biomedical Ti-6Al-4V implants, a Ta₂N nanoceramic coating was synthesized on a Ti-6Al-4V substrate by the double glow discharge plasma process. The Ta₂N coating, composed of fine nanocrystals, with an average grain size of 12.8 nm, improved the surface hardness of Ti-6Al-4V and showed good contact damage tolerance and good adhesion strength to the substrate. The corrosion resistance of the Ta₂N coating in Ringer's physiological solution at 37 °C was evaluated by different electrochemical techniques: potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), potentiostatic polarization and capacitance measurements (Mott-Schottky approach)...
September 10, 2016: Materials
Jiang-Jing Wang, Ya-Zhi Xu, Riccardo Mazzarello, Matthias Wuttig, Wei Zhang
Metal-insulator transition (MIT) is one of the most essential topics in condensed matter physics and materials science. The accompanied drastic change in electrical resistance can be exploited in electronic devices, such as data storage and memory technology. It is generally accepted that the underlying mechanism of most MITs is an interplay of electron correlation effects (Mott type) and disorder effects (Anderson type), and to disentangle the two effects is difficult. Recent progress on the crystalline Ge₁Sb₂Te₄ (GST) compound provides compelling evidence for a disorder-driven MIT...
July 27, 2017: Materials
Cheng-Wei Jiang, I-Chih Ni, Yun-Lien Hsieh, Shien-Der Tzeng, Cen-Shawn Wu, Watson Kuo
The Anderson insulating states in Au nanoparticle assembly are identified and studied under the application of magnetic fields and gate voltages. When the inter-nanoparticle tunneling resistance is smaller than the quantum resistance, the system showing zero Mott gap can be insulating at very low temperature. In contrast to Mott insulators, Anderson insulators exhibit great negative magnetoresistance, inferring charge delocalization in a strong magnetic field. When probed by the electrodes spaced by ~200 nm, they also exhibit interesting gate-modulated current similar to the multi-dot single electron transistors...
June 12, 2017: Materials
Jin-Yang Jiang, Danqian Wang, Hong-Yan Chu, Han Ma, Yao Liu, Yun Gao, Jinjie Shi, Wei Sun
An elaborative study was carried out on the growth mechanism and properties of the passive film for a new kind of alloyed corrosion-resistant steel (CR steel). The passive film naturally formed in simulated concrete pore solutions (pH = 13.3). The corrosion resistance was evaluated by various methods including open circuit potential (OCP), linear polarization resistance (LPR) measurements, and electrochemical impedance spectroscopy (EIS). Meanwhile, the 2205 duplex stainless steel (SS steel) was evaluated for comparison...
April 14, 2017: Materials
T Hensgens, T Fujita, L Janssen, Xiao Li, C J Van Diepen, C Reichl, W Wegscheider, S Das Sarma, L M K Vandersypen
Interacting fermions on a lattice can develop strong quantum correlations, which are the cause of the classical intractability of many exotic phases of matter. Current efforts are directed towards the control of artificial quantum systems that can be made to emulate the underlying Fermi-Hubbard models. Electrostatically confined conduction-band electrons define interacting quantum coherent spin and charge degrees of freedom that allow all-electrical initialization of low-entropy states and readily adhere to the Fermi-Hubbard Hamiltonian...
August 2, 2017: Nature
Shoushuang Huang, Dui Ma, Zhangjun Hu, Qingquan He, Jiantao Zai, Dayong Chen, Huai Sun, Zhiwen Chen, Qiquan Qiao, Minghong Wu, Xuefeng Qian
Platinum (Pt) -based alloys are considerably promising electrocatalysts for the reduction of I‒/I3‒ and Co2+/Co3+ redox couples in dye-sensitized solar cells (DSSCs). However, it is still challenging to minimize the dosage of Pt to achieve comparable or even higher catalytic efficiency. Here, by taking full advantages of the Mott-Schottky (M-S) effect at metal-semiconductor interface, we successfully strategize a low-Pt-based M-S catalyst with enhanced electrocatalytic performance and stability for the large-scale application of DSSCs...
August 2, 2017: ACS Applied Materials & Interfaces
James Lee, Nigel Mott, Usman Mahmood, John Clouston, Kara Summers, Pauline Nicholas, Pedro Henrique França Gois, Dwarakanathan Ranganathan
INTRODUCTION: Radiological insertion of Tenckhoff catheters can be an alternative option for peritoneal dialysis access creation, as compared to surgical catheter insertion. This study will review the outcomes and complications of radiological Tenckhoff catheter insertion in a metropolitan renal service and compare costs between surgical and radiological insertion. METHODS: Data were collected prospectively for all patients who had a Tenckhoff catheter insertion for peritoneal dialysis (PD) under radiological guidance at our hospital from May 2014 to November 2016...
August 1, 2017: Journal of Medical Imaging and Radiation Oncology
Malkeshkumar Patel, Joondong Kim
In this data article, optical properties and impedance spectroscopy analyses were applied for the 5 μm-height pillar Si solar cells to analyzed the insight of the Si geometric effect (Yadav et al., 2017) [1]. The surface reflectance data measured for all Si pillar samples (Fixed height of 5 μm with varying width and period. Geometric features of Si pillars are summarized in Table 1) are presented. Statistical data after analysis are summarized in the table, to profile the integrated reflectance quantitatively...
October 2017: Data in Brief
R Arouca, M B Silva Neto, C M Chaves, M Nagao, S Watauchi, I Tanaka, M ElMassalami
Layered BiS [Formula: see text] -based series, such as LaO [Formula: see text] F [Formula: see text] BiS [Formula: see text] and Sr [Formula: see text] La [Formula: see text] FBiS [Formula: see text] , offer ideal examples for studying normal and superconducting phase diagram of a solid solution that evolves from a nonmagnetic band-insulator parent. We constructed typical [Formula: see text] phase diagrams of these systems based on events occurring in thermal evolution of their electrical resistivity, [Formula: see text]...
September 6, 2017: Journal of Physics. Condensed Matter: An Institute of Physics Journal
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