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https://www.readbyqxmd.com/read/28808267/novel-twin-roll-cast-ti-al-clad-sheets-with-excellent-tensile-properties
#1
Dae Woong Kim, Dong Ho Lee, Jung-Su Kim, Seok Su Sohn, Hyoung Seop Kim, Sunghak Lee
Pure Ti or Ti alloys are recently spot-lighted in construction industries because they have excellent resistance to corrosions, chemicals, and climates as well as various coloring characteristics, but their wide applications are postponed by their expensiveness and poor formability. We present a new fabrication process of Ti/Al clad sheets by bonding a thin Ti sheet on to a 5052 Al alloy melt during vertical-twin-roll casting. This process has merits of reduced production costs as well as improved tensile properties...
August 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28801630/the-role-of-snell-s-law-for-a-magnonic-majority-gate
#2
Naoki Kanazawa, Taichi Goto, Koji Sekiguchi, Alexander B Granovsky, Caroline A Ross, Hiroyuki Takagi, Yuichi Nakamura, Hironaga Uchida, Mitsuteru Inoue
In the fifty years since the postulation of Moore's Law, the increasing energy consumption in silicon electronics has motivated research into emerging devices. An attractive research direction is processing information via the phase of spin waves within magnonic-logic circuits, which function without charge transport and the accompanying heat generation. The functional completeness of magnonic logic circuits based on the majority function was recently proved. However, the performance of such logic circuits was rather poor due to the difficulty of controlling spin waves in the input junction of the waveguides...
August 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28798660/human-summating-potential-using-continuous-loop-averaging-deconvolution-response-amplitudes-vary-with-tone-burst-repetition-rate-and-duration
#3
Alana E Kennedy, Wafaa A Kaf, John A Ferraro, Rafael E Delgado, Jeffery T Lichtenhan
Electrocochleography (ECochG) to high repetition rate tone bursts may have advantages over ECochG to clicks with standard slow rates. Tone burst stimuli presented at a high repetition rate may enhance summating potential (SP) measurements by reducing neural contributions resulting from neural adaptation to high stimulus repetition rates. To allow for the analysis of the complex ECochG responses to high rates, we deconvolved responses using the Continuous Loop Averaging Deconvolution (CLAD) technique. We examined the effect of high stimulus repetition rate and stimulus duration on SP amplitude measurements made with extratympanic ECochG to tone bursts in 20 adult females with normal hearing...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28794323/development-of-an-attenuated-total-reflection-based-fiber-optic-sensor-for-real-time-sensing-of-biofilm-formation
#4
Tatsuya Orii, Takuya Okazaki, Noriko Hata, Kazuharu Sugawara, Faidz A Rahman, Hideki Kuramitz
A fiber-optic sensor capable of real-time monitoring of biofilm formation in water was developed. The sensor can be easily fabricated by removing the cladding of a multimode fiber optic to expose the core. The sensing action is based on the penetration of an evanescent wave through a biofilm formed on the surface of the exposed fiber core during total internal reflection. The proposed setup can be used to analyze the transmittance response over a wide wavelength range using a white-light source and a spectroscopy detector...
2017: Analytical Sciences: the International Journal of the Japan Society for Analytical Chemistry
https://www.readbyqxmd.com/read/28777619/waveguides-with-absorbing-boundaries-nonlinearity-controlled-by-an-exceptional-point-and-solitons
#5
Bikashkali Midya, Vladimir V Konotop
We reveal the existence of continuous families of guided single-mode solitons in planar waveguides with weakly nonlinear active core and absorbing boundaries. Stable propagation of TE and TM-polarized solitons is accompanied by attenuation of all other modes, i.e., the waveguide features properties of conservative and dissipative systems. If the linear spectrum of the waveguide possesses exceptional points, which occurs in the case of TM polarization, an originally focusing (defocusing) material nonlinearity may become effectively defocusing (focusing)...
July 21, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28775297/on-the-influence-of-interface-charging-dynamics-and-stressing-conditions-in-strained-silicon-devices
#6
Irene Olivares, Todora Angelova, Pablo Sanchis
The performance of strained silicon devices based on the deposition of a top silicon nitride layer with high stress have been thoroughly analyzed by means of simulations and experimental results. Results clearly indicate that the electro-optic static response is basically governed by carrier effects. A first evidence is the appearance of a variable optical absorption with the applied voltage that should not occur in case of having a purely electro-optic Pockels effect. However, hysteresis and saturation effects are also observed...
August 3, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28773934/tic-reinforcement-composite-coating-produced-using-graphite-of-the-cast-iron-by-laser-cladding
#7
Yanhui Liu, Weicheng Qu, Yu Su
In this study, a TiC-reinforced composite coating was produced to improve the wear resistance of a pearlite matrix grey iron using a pre-placed Ti powder by laser cladding. Results of scanning electron microscopy (SEM), X-ray diffractometer (XRD), and energy dispersive X-ray spectroscopy (EDS) confirmed that the coating was composed of TiC particles and two kinds of α-Fe phase. The fine TiC particles were only a few microns in size and uniformly distributed on the matrix phase in the composite coating. The microstructure characteristic of the composite coating resulted in the microhardness rising to about 1000 HV0...
September 30, 2016: Materials
https://www.readbyqxmd.com/read/28773161/effect-of-isothermal-temperature-on-growth-behavior-of-nanostructured-bainite-in-laser-cladded-coatings
#8
Yanbing Guo, Chengwu Yao, Kai Feng, Zhuguo Li, Paul K Chu, Yixiong Wu
The growth and propagation behavior of austenite-to-bainite isothermal transformation in laser-cladded, Si-rich, and Fe-based coatings is investigated. The crystallographic features, orientation relationship at different isothermal temperatures, and the morphology of the nanostructured bainite are determined. The Nishiyama-Wassermann type orientation relationship is observed at a high temperature and at a low temperature, and mixed Nishiyama-Wassermann and Kurdjumov-Sach mechanisms are seen. The growth direction is investigated by the partial dislocation theory and an extrapolated model based on the repeated formation of lenticular-shaped subunits and pile-up along the close-packed directions of the close-packed planes...
July 14, 2017: Materials
https://www.readbyqxmd.com/read/28772641/microstructure-evolution-of-tic-particles-in-situ-synthesized-by-laser-cladding
#9
Yanhui Liu, Jieqiong Ding, Weicheng Qu, Yu Su, Zhishui Yu
In this paper, a TiC reinforcement metal matrix composite coating is produced using nickel and graphite mixing powder on the surface ofTi-6Al-4V alloy by laser radiation. The microstructure of the coatings is investigated by XRD, SEM and EDS. Results show that most of the TiC phase is granular, with a size of several micrometers, and a few of the TiC phases are petals or flakes. At the cross-section of the coatings, a few special TiC patterns are found and these TiC patterns do not always occur at the observed cross-section...
March 11, 2017: Materials
https://www.readbyqxmd.com/read/28772639/laser-cladding-of-ultra-thin-nickel-based-superalloy-sheets
#10
Tobias Gabriel, Daniel Rommel, Florian Scherm, Marek Gorywoda, Uwe Glatzel
Laser cladding is a well-established process to apply coatings on metals. However, on substrates considerably thinner than 1 mm it is only rarely described in the literature. In this work 200 µm thin sheets of nickel-based superalloy 718 are coated with a powder of a cobalt-based alloy, Co-28Cr-9W-1.5Si, by laser cladding. The process window is very narrow, therefore, a precisely controlled Yb fiber laser was used. To minimize the input of energy into the substrate, lines were deposited by setting single overlapping points...
March 10, 2017: Materials
https://www.readbyqxmd.com/read/28772519/cr13ni5si2-based-composite-coating-on-copper-deposited-using-pulse-laser-induction-cladding
#11
Ke Wang, Hailin Wang, Guangzhi Zhu, Xiao Zhu
A Cr13Ni5Si2-based composite coating was successfully deposited on copper by pulse laser induction hybrid cladding (PLIC), and its high-temperature wear behavior was investigated. Temperature evolutions associated with crack behaviors in PLIC were analyzed and compared with pulse laser cladding (PLC) using the finite element method. The microstructure and present phases were analyzed using scanning electron microscopy and X-ray diffraction. Compared with continuous laser induction cladding, the higher peak power offered by PLIC ensures metallurgical bonding between highly reflective copper substrate and coating...
February 10, 2017: Materials
https://www.readbyqxmd.com/read/28772497/electrochemical-migration-behavior-of-copper-clad-laminate-and-electroless-nickel-immersion-gold-printed-circuit-boards-under-thin-electrolyte-layers
#12
Pan Yi, Kui Xiao, Kangkang Ding, Chaofang Dong, Xiaogang Li
The electrochemical migration (ECM) behavior of copper-clad laminate (PCB-Cu) and electroless nickel/immersion gold printed circuit boards (PCB-ENIG) under thin electrolyte layers of different thicknesses containing 0.1 M Na₂SO₄ was studied. Results showed that, under the bias voltage of 12 V, the reverse migration of ions occurred. For PCB-Cu, both copper dendrites and sulfate precipitates were found on the surface of FR-4 (board material) between two plates. Moreover, the Cu dendrite was produced between the two plates and migrated toward cathode...
February 8, 2017: Materials
https://www.readbyqxmd.com/read/28769103/flower-like-internal-emission-distribution-of-leds-with-monolithic-integration-of-ingan-based-quantum-wells-emitting-narrow-blue-green-and-red-spectra
#13
Kwanjae Lee, Ilgyu Choi, Cheul-Ro Lee, Tae-Hoon Chung, Yoon Seok Kim, Kwang-Un Jeong, Dong Chul Chung, Jin Soo Kim
We report a phosphor-free white light-emitting diodes (LED) realized by the monolithic integration of In0.18Ga0.82N/GaN (438 nm, blue), In0.26Ga0.74N/GaN (513 nm, green), and In0.45Ga0.55N/In0.13Ga0.87N (602 nm, red) quantum wells (QWs) as an active medium. The QWs corresponding to blue and green light were grown using a conventional growth mode. For the red spectral emission, five-stacked In0.45Ga0.55N/In0.13Ga0.87N QWs were realized by the so-called Ga-flow-interruption (Ga-FI) technique, wherein the Ga supply was periodically interrupted during the deposition of In0...
August 2, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28765573/all-laser-micromachining-of-ridge-waveguides-in-linbo3-crystal-for-mid-infrared-band-applications
#14
Lingqi Li, Weijie Nie, Ziqi Li, Qingming Lu, Carolina Romero, Javier R Vázquez de Aldana, Feng Chen
The femtosecond laser micromachining of transparent optical materials offers a powerful and feasible solution to fabricate versatile photonic components towards diverse applications. In this work, we report on a new design and fabrication of ridge waveguides in LiNbO3 crystal operating at the mid-infrared (MIR) band by all-femtosecond-laser microfabrication. The ridges consist of laser-ablated sidewalls and laser-written bottom low-index cladding tracks, which are constructed for horizontal and longitudinal light confinement, respectively...
August 1, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28747968/quinolone-susceptibility-and-genetic-characterization-of-salmonella-enterica-subsp-enterica-isolated-from-pet-turtles
#15
B C J De Silva, Sabrina Hossain, S H M P Wimalasena, H N K S Pathirana, Mitchell Wendt, Gang-Joon Heo
Turtle-borne Salmonella enterica owns significance as a leading cause in human salmonellosis. The current study aimed to determine the quinolone susceptibility and the genetic characteristics of 21 strains of S. enterica subsp. enterica isolated from pet turtles. Susceptibility of four antimicrobials including nalidixic acid, ciprofloxacin, ofloxacin, and levofloxacin was examined in disk diffusion and MIC tests where the majority of the isolates were susceptible to all tested quinolones. In genetic characterization, none of the isolates were positive for qnr or aac(6')-Ib genes and no any target site mutations could be detected in gyrA, gyrB, and parC quinolone resistance determining regions (QRDR)...
June 2017: Laboratory Animal Research
https://www.readbyqxmd.com/read/28743965/nanocrystalline-diamond-protects-zr-cladding-surface-against-oxygen-and-hydrogen-uptake-nuclear-fuel-durability-enhancement
#16
Jan Škarohlíd, Petr Ashcheulov, Radek Škoda, Andrew Taylor, Radim Čtvrtlík, Jan Tomáštík, František Fendrych, Jaromír Kopeček, Vladimír Cháb, Stanislav Cichoň, Petr Sajdl, Jan Macák, Peng Xu, Jonna M Partezana, Jan Lorinčík, Jana Prehradná, Martin Steinbrück, Irena Kratochvílová
In this work, we demonstrate and describe an effective method of protecting zirconium fuel cladding against oxygen and hydrogen uptake at both accident and working temperatures in water-cooled nuclear reactor environments. Zr alloy samples were coated with nanocrystalline diamond (NCD) layers of different thicknesses, grown in a microwave plasma chemical vapor deposition apparatus. In addition to showing that such an NCD layer prevents the Zr alloy from directly interacting with water, we show that carbon released from the NCD film enters the underlying Zr material and changes its properties, such that uptake of oxygen and hydrogen is significantly decreased...
July 25, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28729000/airway-microbiota-signals-anabolic-and-catabolic-remodeling-in-the-transplanted-lung
#17
Stéphane Mouraux, Eric Bernasconi, Céline Pattaroni, Angela Koutsokera, John-David Aubert, Johanna Claustre, Christophe Pison, Pierre-Joseph Royer, Antoine Magnan, Romain Kessler, Christian Benden, Paola M Soccal, Benjamin J Marsland, Laurent P Nicod
BACKGROUND: Homeostatic turnover of the extracellular matrix conditions the structure and function of the healthy lung. In lung transplantation, long-term management remains limited by Chronic Lung Allograft Dysfunction (CLAD), an umbrella term used for a heterogeneous entity ultimately associated with pathological airway and/or parenchyma remodeling. OBJECTIVE: To assess whether the local cross-talk between the pulmonary microbiota and host cells is a key determinant in the control of lower airway remodeling post-transplantation...
July 17, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28725052/monolithically-integrated-te-mode-1d-silicon-on-insulator-isolators-using-seedlayer-free-garnet
#18
Cui Zhang, Prabesh Dulal, Bethanie J H Stadler, David C Hutchings
The first experimental TE-mode silicon-on-insulator (SOI) isolators using Faraday Rotation are here realized to fill the 'missing link' in source-integrated near infrared photonic circuits. The isolators are simple 1D 2-element waveguides, where garnet claddings and longitudinal magnetic fields produce nonreciprocal mode conversion, the waveguide equivalent of Faraday Rotation (FR). Quasi-phase matched claddings are used to overcome the limitations of birefringence. Current experimental SOI isolators use nonreciprocal phase shift (NRPS) in interferometers or ring resonators, but to date NRPS requires TM-modes, so the TE-modes normally produced by integrated lasers cannot be isolated without many ancillary polarisation controls...
July 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28720146/analysis-of-long-term-cd4-cd25highcd127-t-reg-cells-kinetics-in-peripheral-blood-of-lung-transplant-recipients
#19
Davide Piloni, Monica Morosini, Sara Magni, Alice Balderacchi, Luigia Scudeller, Emanuela Cova, Tiberio Oggionni, Giulia Stella, Carmine Tinelli, Filippo Antonacci, Andrea Maria D'Armini, Federica Meloni
BACKGROUND: The role of CD4(+)CD25(high)CD127(-) T-reg cells in solid-organ Transplant (Tx) acceptance has been extensively studied. In previous studies on kidney and liver recipients, peripheral T-reg cell counts were associated to graft survival, while in lung Tx, there is limited evidence for similar findings. This study aims to analyze long term peripheral kinetics of T-reg-cells in a cohort of lung recipients and tests its association to several clinical variables. METHODS: From jan 2009 to dec 2014, 137 lung Tx recipients were submitted to an immunological follow up (median: 105...
July 18, 2017: BMC Pulmonary Medicine
https://www.readbyqxmd.com/read/28700105/dante-s-inferno-canto-xxx-imaginary-or-real-liver-disease
#20
Luigi Roffi
This image (Figure 1) shows a glimpse of Hell (Divine Comedy), when Dante Alighieri encounters Master Adam (who, having counterfeited the Florentine money, was burned at the stake in Florence in 1281), and Sinon (who tricked the Trojans with the wooden horse filled with Achaean warriors). Master Adam, an Englishman (magistro Adam de Anglia) (1) has the shape of a lute, a rotting face, and an abdomen bloated by a disease called 'dropsy' ("…And one I saw, who like a lute were shaped / if he had only had his groin cut off / down in the region where a man is forked / The heavy dropsy which unmates the limbs / in such a way with ill-digested humor / that face and paunch no longer correspond…/ Divine Comedy, Inferno XXX, 49-54) (2)...
July 12, 2017: Liver International: Official Journal of the International Association for the Study of the Liver
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