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https://www.readbyqxmd.com/read/29792812/ultralow-damping-in-nanometer-thick-epitaxial-spinel-ferrite-thin-films
#1
Satoru Emori, Di Yi, Sam Crossley, Jacob J Wisser, Purnima P Balakrishnan, Behrouz Khodadadi, Padraic Shafer, Christoph Klewe, Alpha T N'Diaye, Brittany T Urwin, Krishnamurthy Mahalingam, Brandon Howe, Harold Y Hwang, Elke Arenholz, Yuri Suzuki
Pure spin currents, unaccompanied by dissipative charge flow, are essential for realizing energy-efficient nanomagnetic information and communications devices. Thin-film magnetic insulators have been identified as promising materials for spin-current technology, since they are thought to exhibit lower damping compared to their metallic counterparts. However, insulating behavior is not a sufficient requirement for low damping, as evidenced by the very limited options for low-damping insulators. Here, we demonstrate a new class of nanometer-thick ultralow-damping insulating thin films, based on design criteria that minimize orbital angular momentum and structural disorder...
May 24, 2018: Nano Letters
https://www.readbyqxmd.com/read/29791408/correction-of-phase-delay-distortion-for-%C3%AE-%C3%AE-circular-scanning
#2
Jian Liu, Xiaoyu You, Yuhang Wang, Chenguang Liu, Jiubin Tan
α-β circular scanning with a large scanning field of view and high reliability can be widely applied in laser scanning imaging systems and laser processing. However, mechanical inertia of the galvanometers introduces phase delay and ultimately leads to scanning distortions in α-β circular scanning in both constant angular velocity scanning (CAVS) and constant line velocity scanning (CLVS). To compensate for the phase-delay distortions, two correction models are respectively proposed for CAVS and CLVS, which utilize phase-frequency relationships based on the galvanometer's transfer function...
May 20, 2018: Applied Optics
https://www.readbyqxmd.com/read/29791396/effective-freeform-tir-lens-designed-for-leds-with-high-angular-color-uniformity
#3
Zhili Zhao, Honghai Zhang, Sheng Liu, Xinzhong Wang
Most LED luminaires face the problem of color nonuniformity in illumination fields, which seriously degrades their lighting quality. To address this issue, we proposed a freeform TIR lens, which could be applied to the most widely adopted phosphor-converted LEDs and multicolor LED arrays. Based on light pattern overlap and energy mapping, the novel TIR lens comprised the freeform panel and the collimator. Analysis of angular color uniformity (ACU), based on a phosphor-converted white LED model, proved that the normalized standard deviation (NSD) of the LED integrated with the freeform TIR lens significantly decreased from 0...
May 20, 2018: Applied Optics
https://www.readbyqxmd.com/read/29791393/on-the-use-of-deep-neural-networks-in-optical-communications
#4
Sanjaya Lohani, Erin M Knutson, Matthew O'Donnell, Sean D Huver, Ryan T Glasser
Information transfer rates in optical communications may be dramatically increased by making use of spatially non-Gaussian states of light. Here, we demonstrate the ability of deep neural networks to classify numerically generated, noisy Laguerre-Gauss modes of up to 100 quanta of orbital angular momentum with near-unity fidelity. The scheme relies only on the intensity profile of the detected modes, allowing for considerable simplification of current measurement schemes required to sort the states containing increasing degrees of orbital angular momentum...
May 20, 2018: Applied Optics
https://www.readbyqxmd.com/read/29791332/polarization-dependent-wide-angle-color-filter-incorporating-meta-dielectric-nanostructures
#5
Shangliang Wu, Yan Ye, Minghui Luo, Linsen Chen
A metadielectric nanostructure with narrow cavities is proposed, behaving as a reflective color filter for TM-polarized light while as a broadband reflector for TE-polarized light. By varying the cavity depth or changing the incident light polarization, reflective colors of the proposed structure cover the entire visible spectrum conveniently. In particular, the reflections of this proposed structure show good angular tolerance up to 50° for both polarizations. Furthermore, it can display colors even with two grating slits, which shows high printing resolution up to 70555 dpi, having great potential for applications of a large area color imaging and anticounterfeiting devices...
May 10, 2018: Applied Optics
https://www.readbyqxmd.com/read/29791147/investigations-of-the-magnetic-and-spectroscopic-properties-of-v-iii-and-v-iv-complexes
#6
Casey Van Stappen, Dimitrios Maganas, Serena DeBeer, Eckhard Bill, Frank Neese
Herein, we utilize a variety of physical methods including magnetometry (SQUID), electron paramagnetic resonance (EPR), and magnetic circular dichroism (MCD), in conjunction with high-level ab initio theory to probe both the ground and ligand-field excited electronic states of a series of V(IV) ( S = 1 /2 ) and V(III) ( S = 1) molecular complexes. The ligand fields of the central metal ions are analyzed with the aid of ab initio ligand-field theory (AILFT), which allows for a chemically meaningful interpretation of multireference electronic structure calculations at the level of the complete-active-space self-consistent field with second-order N-electron valence perturbation theory...
May 23, 2018: Inorganic Chemistry
https://www.readbyqxmd.com/read/29791077/alterations-of-brain-network-hubs-in-reflex-syncope-evidence-from-a-graph-theoretical-analysis-based-on-dti
#7
Bong Soo Park, Yoo Jin Lee, Jin-Han Park, Il Hwan Kim, Si Hyung Park, Ho-Joon Lee, Kang Min Park
OBJECTIVE: We evaluated global topology and organization of regional hubs in the brain networks and microstructural abnormalities in the white matter of patients with reflex syncope. METHODS: Twenty patients with reflex syncope and thirty healthy subjects were recruited, and they underwent diffusion tensor imaging (DTI) scans. Graph theory was applied to obtain network measures based on extracted DTI data, using DSI Studio. We then investigated differences in the network measures between the patients with reflex syncope and the healthy subjects...
May 23, 2018: Brain and Behavior
https://www.readbyqxmd.com/read/29791029/development-of-a-3d-ultrasound-guidance-system-for-permanent-breast-seed-implantation
#8
Justin Michael, Daniel Morton, Deidre Batchelar, Michelle Hilts, Juanita Crook, Aaron Fenster
PURPOSE: Permanent breast seed implantation (PBSI) is a promising radiotherapy technique for early-stage breast cancer, completed in a single visit by permanently implanting 103 Pd seeds using needles inserted through a template and guided by 2D ultrasound (US). However, operator dependence has been highlighted as a limitation of this procedure. Consequently, we propose and have developed an intraoperative guidance system using 3D US and an instrumented mechanical arm to provide intraoperative 3D imaging and needle template tracking...
May 23, 2018: Medical Physics
https://www.readbyqxmd.com/read/29788752/cue-reactivity-in-behavioral-addictions-a-meta-analysis-and-methodological-considerations
#9
Katrin Starcke, Stephanie Antons, Patrick Trotzke, Matthias Brand
Background and aims Recent research has applied cue-reactivity paradigms to behavioral addictions. The aim of the current meta-analysis is to systematically analyze the effects of learning-based cue-reactivity in behavioral addictions. Methods The current meta-analysis includes 18 studies (29 data sets, 510 participants) that have used a cue-reactivity paradigm in persons with gambling (eight studies), gaming (nine studies), or buying (one study) disorders. We compared subjective, peripheral physiological, electroencephal, and neural responses toward addiction-relevant cues in patients versus control participants and toward addiction-relevant cues versus control cues in patients...
May 23, 2018: Journal of Behavioral Addictions
https://www.readbyqxmd.com/read/29788751/radiographic-analysis-of-the-correlation-between-ossification-of-the-nuchal-ligament-and-sagittal-alignment-and-segmental-stability-of-the-cervical-spine-in-patients-with-cervical-spondylotic-myelopathy
#10
Jinwei Ying, Honglin Teng, Yunfan Qian, Yingying Hu, Tianyong Wen, Dike Ruan, Minyu Zhu
Background Ossification of the nuchal ligament (ONL) caused by chronic injury to the nuchal ligament (NL) is very common in instability-related cervical disorders. Purpose To determine possible correlations between ONL, sagittal alignment, and segmental stability of the cervical spine. Material and Methods Seventy-three patients with cervical spondylotic myelopathy (CSM) and ONL (ONL group) and 118 patients with CSM only (control group) were recruited. Radiographic data included the characteristics of ONL, sagittal alignment and segmental stability, and ossification of the posterior longitudinal ligament (OPLL)...
January 1, 2018: Acta Radiologica
https://www.readbyqxmd.com/read/29787785/junior-temperament-character-inventory-together-with-quantitative-eeg-discriminate-children-with-attention-deficit-hyperactivity-disorder-combined-subtype-from-children-with-attention-deficit-hyperactivity-disorder-combined-subtype-plus-oppositional-defiant
#11
Giuseppe A Chiarenza, Stefania Villa, Lidice Galan, Pedro Valdes-Sosa, Jorge Bosch-Bayard
Oppositional defiant disorder (ODD) is frequently associated with Attention Deficit Hyperactivity Disorder (ADHD) but no clear neurophysiological evidence exists that distinguishes the two groups. Our aim was to identify biomarkers that distinguish children with Attention Deficit Hyperactivity Disorder combined subtype (ADHD_C) from children with ADHD_C + ODD, by combining the results of quantitative EEG (qEEG) and the Junior Temperament Character Inventory (JTCI). 28 ADHD_C and 22 ADHD_C + ODD children who met the DSMV criteria participated in the study...
May 19, 2018: International Journal of Psychophysiology
https://www.readbyqxmd.com/read/29786720/a-strain-induced-subwavelength-structure-for-a-haze-free-and-highly-transparent-flexible-plastic-substrate
#12
Jae Yong Park, Juyoung Ham, Illhwan Lee, Jong-Lam Lee
This paper presents a method to produce subwavelength-scale (<250 nm) AgCl nanostructures on a flexible plastic film, which is indispensable for highly efficient flexible displays. Using Cl2 plasma treatment on an Ag-coated plastic film, AgCl nanostructures were produced through the reaction of Ag atoms with Cl radicals. During the reaction, the volume of AgCl expands, leading to drastically changed surface morphology from a two-dimensional (2D) flat Ag surface to a 3D subwavelength-scale AgCl nanostructure...
May 22, 2018: Nanoscale
https://www.readbyqxmd.com/read/29786665/automated-field-of-view-illumination-and-recognition-algorithm-design-of-a-vision-system-for-pick-and-place-considering-colour-information-in-illumination-and-images
#13
Yibing Chen, Taiki Ogata, Tsuyoshi Ueyama, Toshiyuki Takada, Jun Ota
Machine vision is playing an increasingly important role in industrial applications, and the automated design of image recognition systems has been a subject of intense research. This study has proposed a system for automatically designing the field-of-view (FOV) of a camera, the illumination strength and the parameters in a recognition algorithm. We formulated the design problem as an optimisation problem and used an experiment based on a hierarchical algorithm to solve it. The evaluation experiments using translucent plastics objects showed that the use of the proposed system resulted in an effective solution with a wide FOV, recognition of all objects and 0...
May 22, 2018: Sensors
https://www.readbyqxmd.com/read/29786663/modeling-the-effect-of-primary-and-secondary-twinning-on-texture-evolution-during-severe-plastic-deformation-of-a-twinning-induced-plasticity-steel
#14
Laszlo S Toth, Christian Haase, Robert Allen, Rimma Lapovok, Dmitri A Molodov, Mohammed Cherkaoui, Haitham El Kadiri
Modeling the effect of deformation twinning and the ensuing twin-twin- and slip-twin-induced hardening is a long-standing problem in computational mechanical metallurgy of materials that deform by both slip and twinning. In this work, we address this effect using the twin volume transfer method, which obviates the need of any cumbersome criterion for twin variant selection. Additionally, this method is capable of capturing, at the same time, secondary or double twinning, which is particularly important for modeling in large strain regimes...
May 22, 2018: Materials
https://www.readbyqxmd.com/read/29785834/development-of-a-robust-mri-fiducial-system-for-automated-fusion-of-mr-us-abdominal-images
#15
Christopher P Favazza, Krzysztof R Gorny, Matthew R Callstrom, Anil N Kurup, Michael Washburn, Pamela S Trester, Charles L Fowler, Nicholas J Hangiandreou
We present the development of a two-component magnetic resonance (MR) fiducial system, that is, a fiducial marker device combined with an auto-segmentation algorithm, designed to be paired with existing ultrasound probe tracking and image fusion technology to automatically fuse MR and ultrasound (US) images. The fiducial device consisted of four ~6.4 mL cylindrical wells filled with 1 g/L copper sulfate solution. The algorithm was designed to automatically segment the device in clinical abdominal MR images...
May 21, 2018: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/29785590/clinical-application-of-a-minimally-invasive-cement-augmentable-schanz-screw-rod-system-to-treat-pelvic-ring-fractures
#16
Paul Schmitz, Florian Baumann, Yves P Acklin, Boyko Gueorguiev, Michael Nerlich, Stephan Grechenig, Michael Bernd Müller
PURPOSE: The purpose of this study is to analyze the results using the USS fracture MIS system (DePuy Synthes) to treat instable pelvic ring fractures. As its outstanding feature, it is the only Schanz screw and rod system at present that combines angular stability, perforation/fenestration of the screws for cement-augmentation, a variable screw length, and a large screw diameter. MATERIALS AND METHODS: Retrospective investigation of 134 pelvic ring fractures treated in 2012-2013...
May 21, 2018: International Orthopaedics
https://www.readbyqxmd.com/read/29785589/a-novel-technology-for-3d-knee-prosthesis-planning-and-treatment-evaluation-using-2d-x-ray-radiographs-a-clinical-evaluation
#17
Guoyan Zheng, Hagen Hommel, Alper Akcoltekin, Benedikt Thelen, Jan Stifter, Geert Peersman
PURPOSE:  To present a clinical validation of a novel technology called "3X" which allows for 3D prosthesis planning and treatment evaluation in total knee arthroplasty (TKA) using only 2D X-ray radiographs. MATERIALS AND METHODS:  After local institution review board approvals, 3X was evaluated on 43 cases (23 for preoperative planning and 20 for postoperative treatment evaluation). All the patients underwent CT scans according to a standard protocol...
May 21, 2018: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/29782580/magic-circle
#18
Jan Koenderink, Andrea van Doorn, Johan Wagemans
Full-horizon cylindrical projections of the optic array are in common use. One wonders whether the public actually profits from such pictorial information, since the space behind one's back does not exist in visual awareness. In an experiment, a test image included six persons located at the corners of an irregular hexagon centred at the camera. Two persons faced the camera, two turned their back to the camera and two others faced a direction at right angles to the camera. The distances to the camera were unequal and varied from 1 to 2 m...
May 2018: I-Perception
https://www.readbyqxmd.com/read/29781029/infrared-spectrum-and-intermolecular-potential-energy-surface-of-the-co-o-2-dimer
#19
A J Barclay, A R W McKellar, N Moazzen-Ahmadi, Richard Dawes, Xiao-Gang Wang, Tucker Carrington
Only a few weakly-bound complexes containing the O2 molecule have been characterized by high resolution spectroscopy, no doubt due to the complications added by the oxygen molecule's unpaired electron spin. Here we report an extensive infrared spectrum of CO-O2, observed in the CO fundamental band region using a tunable quantum cascade laser to probe a pulsed supersonic jet expansion. The rotational energy level pattern derived from the spectrum consists of stacks of levels characterized by the total angular momentum, J, and its projection on the intermolecular axis, K...
May 21, 2018: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/29780141/hemorrhagic-stress-induced-gastric-ulcer-in-a-healthy-toddler
#20
Katsunori Matsueda, Tatsuya Toyokawa, Masahiro Sakata, Isao Fujita, Jouichiro Horii, Yoshiko Abe, Toru Araki
A 1-year-old female toddler who was under a great amount of psychological stress presented with acute hematemesis. She had no significant medical history; she displayed lethargy and was anemic. Although blood transfusion and famotidine were administered for upper gastrointestinal bleeding (UGIB), the anemia did not improve. Thus, early endoscopy was performed under general anesthesia, revealing a gastric ulcer with exposed vessels in the supra-angular region. Cauterization via bipolar hemostatic forceps was performed on the exposed vessels, and the bleeding was controlled successfully...
May 18, 2018: Internal Medicine
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