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https://www.readbyqxmd.com/read/28430476/generalized-pseudopotentials-for-the-anisotropic-fractional-quantum-hall-effect
#1
Bo Yang, Zi-Xiang Hu, Ching Hua Lee, Z Papić
We generalize the notion of Haldane pseudopotentials to anisotropic fractional quantum Hall (FQH) systems that are physically realized, e.g., in tilted magnetic field experiments or anisotropic band structures. This formalism allows us to expand any translation-invariant interaction over a complete basis, and directly reveals the intrinsic metric of incompressible FQH fluids. We show that purely anisotropic pseudopotentials give rise to new types of bound states for small particle clusters in the infinite plane, and can be used as a diagnostic of FQH nematic order...
April 7, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28430261/wideband-spectrum-analysis-of-ultra-high-frequency-radio-wave-signals-due-to-advanced-one-phonon-non-collinear-anomalous-light-scattering
#2
Alexandre S Shcherbakov, Adan Omar Arellanes
We present a principally new acousto-optical cell providing an advanced wideband spectrum analysis of ultra-high frequency radio-wave signals. For the first time, we apply a recently developed approach with the tilt angle to a one-phonon non-collinear anomalous light scattering. In contrast to earlier cases, now one can exploit a regime with the fixed optical wavelength for processing a great number of acoustic frequencies simultaneously in the linear regime. The chosen rutile-crystal combines a moderate acoustic velocity with low acoustic attenuation and allows us wide-band data processing within GHz-frequency acoustic waves...
April 20, 2017: Applied Optics
https://www.readbyqxmd.com/read/28430247/precise-calibration-of-pupil-images-in-pyramid-wavefront-sensor
#3
Yong Liu, Quanquan Mu, Zhaoliang Cao, Lifa Hu, Chengliang Yang, Li Xuan
The pyramid wavefront sensor (PWFS) is a novel wavefront sensor with several inspiring advantages compared with Shack-Hartmann wavefront sensors. The PWFS uses four pupil images to calculate the local tilt of the incoming wavefront. Pupil images are conjugated with a telescope pupil so that each pixel in the pupil image is diffraction-limited by the telescope pupil diameter, thus the sensing error of the PWFS is much lower than that of the Shack-Hartmann sensor and is related to the extraction and alignment accuracy of pupil images...
April 20, 2017: Applied Optics
https://www.readbyqxmd.com/read/28430226/stable-nanosecond-passively-q-switched-all-fiber-erbium-doped-laser-with-a-45%C3%A2-tilted-fiber-grating
#4
Tianxing Wang, Zhijun Yan, Chengbo Mou, Kaiming Zhou, Lin Zhang
Nanosecond passive Q-switching generation from an all-fiber erbium-doped laser with a UV inscribed 45° tilted fiber grating (TFG) is systematically demonstrated. The 45° TFG is employed as a polarizer together with two polarization controllers (PCs) to realize nonlinear polarization rotation (NPR). Because of the NPR effect, stable Q-switched pulses with an average output power of 17.5 mW, a single pulse energy of 72.7 nJ, a repetition rate of 241 kHz, a pulse width of 466 ns, and a signal to noise ratio (SNR) of 58...
April 20, 2017: Applied Optics
https://www.readbyqxmd.com/read/28430108/a-network-physiology-approach-to-the-assessment-of-the-link-between-sinoatrial-and-ventricular-cardiac-controls
#5
Alberto Porta, Vlasta Bari, Beatrice De Maria, Mathias Baumert
A network physiology approach to evaluate the strength of the directed interactions among cardiac controls at sinoatrial and ventricular levels and respiration (R) is proposed. The network is composed of three nodes (i.e. sinoatrial and ventricular cardiac controls and R) and their activity is exemplified by the variability of heart period (HP), the variability of the duration of the electrical activity of the heart approximated as the temporal distance between Q-wave onset and T-wave end or apex (i.e. QTe or QTa) and thoracic movements respectively...
April 21, 2017: Physiological Measurement
https://www.readbyqxmd.com/read/28429934/bi4tao8cl-nano-photocatalyst-influence-of-local-average-and-band-structure
#6
Swetha S M Bhat, Diptikanta Swain, Mikhail Feygenson, Joerg C Neuefeind, Abhishek K Mishra, Janardhan L Hodala, Chandrabhas Narayana, Ganapati V Shanbhag, Nalini G Sundaram
The average structure, local structure, and band structure of nanoparticles of photocatalyst Bi4TaO8Cl, an Aurivillius-Sillen layered material, has been studied by powder neutron Rietveld refinement, neutron pair distribution function technique, Raman scattering, and density functional theory calculations. A significant local structural deviation of nano-Bi4TaO8Cl was established in contrast to the local structure of bulk-Bi4TaO8Cl. Local structure was further supported by Raman scattering measurements. Through DFT calculations, we identify specific features in the electronic band structure that correlate lower secondary structural distortions in nano-Bi4TaO8Cl...
April 21, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28429801/the-dizzy-patient-don-t-forget-disorders-of-the-central-vestibular-system
#7
REVIEW
Thomas Brandt, Marianne Dieterich
Vertigo and dizziness are among the most common complaints in neurology clinics, and they account for about 13% of the patients entering emergency units. In this Review, we focus on central vestibular disorders, which are mostly attributable to acute unilateral lesions of the bilateral vestibular circuitry in the brain. In a tertiary interdisciplinary outpatient dizziness unit, central vestibular disorders, including vestibular migraine, comprise about 25% of the established diagnoses. The signs and symptoms of these disorders can mimic those of peripheral vestibular disorders with sustained rotational vertigo...
April 21, 2017: Nature Reviews. Neurology
https://www.readbyqxmd.com/read/28429690/-our-experience-in-the-diagnosis-and-treatment-of-postural-orthostatic-tachycardia-syndrome-vasovagal-syncope-and-inappropriate-sinus-tachycardia-in-children
#8
Sezen Ugan Atik, Reyhan Dedeoğlu, Aida Koka, Funda Öztunç
OBJECTIVES: The aim of this study was to share our experience in the diagnosis and treatment of patients who presented at our clinic with syncope, pre-syncope, dizziness, and palpitations. STUDY DESIGN: Patients who were treated at pediatric cardiology clinic for complaints of syncope, dizziness, and palpitations between 2014 and 2016 were enrolled in the study. Detailed history of the patients, physical examination findings, laboratory and electrocardiogram results were recorded...
April 2017: Türk Kardiyoloji Derneği Arşivi: Türk Kardiyoloji Derneğinin Yayın Organıdır
https://www.readbyqxmd.com/read/28427385/differences-between-native-and-prosthetic-knees-in-terms-of-cross-sectional-morphology-of-the-femoral-trochlea-a-study-based-on-three-dimensional-models-and-virtual-total-knee-arthroplasty
#9
Zhe Du, Shichang Chen, Mengning Yan, Bing Yue, You Wang
BACKGROUND: The cross-sectional morphology of the prosthetic knee is crucial to understanding patellar motion and quadriceps strength after total knee arthroplasty. However, few comparative evaluations of the cross-sectional morphology of the femoral trochlea have been performed in the native knee and currently available femoral implants, and the relationship between the trochlear anatomy of prosthetic components and post-operative patellofemoral complications remains unclear. We aimed to investigate the differences in cross-sectional morphology of the femoral trochlea between native knees and prosthetic femoral components...
April 20, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28426631/directional-changes-in-tissue-reflectivity-may-influence-flow-detection-on-optical-coherence-tomography-angiography
#10
Rosa Dolz-Marco, K Bailey Freund
PURPOSE: To determine if directional or anatomical changes in tissue reflectivity of Henle fiber layer (HFL) may influence flow detection on optical coherence tomography angiography (OCT-A). METHODS: Cross-sectional analysis of consecutive cases undergoing OCT-A. Directional changes in visualization of HFL were either produced manually by moving the beam entrance within the pupil or observed occurring naturally because of tilting of the OCT line-scan within a myopic staphyloma...
April 19, 2017: Retina
https://www.readbyqxmd.com/read/28426230/photophysics-and-excited-state-properties-of-cyclometalated-iridium-iii-platinum-ii-and-iridium-iii-iridium-iii-bimetallic-complexes-bridged-by-dipyridylpyrazine
#11
Yang-Jin Cho, So-Yoen Kim, Chang Min Choi, Nam Joon Kim, Chul Hoon Kim, Dae Won Cho, Ho-Jin Son, Chyongjin Pac, Sang Ook Kang
We investigated the electrochemical and excited-state properties of 2,3-bis(2-pyridyl)pyrazine (dpp)-bridged bimetallic complexes, (L)2Ir-dpp-PtCl [1, L = 2-(4',6'-difluorophenyl)pyridinato-N,C(2) (dfppy); 2, L = 2-phenylpyridinato-N,C(2) (ppy)] and [(L)2Ir]2(dpp) [3, L = dfppy; 4, L = ppy] compared to monometallic complexes, (L)2Ir-dpp (5, L = dfppy; 6, L = ppy) and dpp-PtCl (dpp-Pt(II)Cl2; 7). The single-crystal X-ray crystallographic structures of 1, 3, 5, and 6 showed that 1 and 3 have approximately coplanar structures of the dpp unit, while the noncoordinated pyridine ring of dpp in 5 and 6 is largely twisted with respect to the pyrazine ring...
April 20, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28425068/analysis-of-cervical-sagittal-alignment-change-following-correction-of-thoracic-and-thoracolumbar-scheuermann-s-kyphosis
#12
Luigi Aurelio Nasto, Saggah Tarek Shalabi, Ana Belen Perez-Romera, Samiul Muquit, Amir Reza Ghasemi, Hossein Mehdian
PURPOSE: To analyse pre-operative and post-operative changes of cervical sagittal alignment (CSA) in Scheuermann's kyphosis (SK) patients. METHODS: 64 SK and 33 control patients were retrospectively reviewed. Whole spine X-rays obtained at pre-op, 3 months post-op and at latest follow-up were reviewed and ten separate CSA radiological parameters were measured. Patients were divided in three groups: thoracic SK (TK group, apex T6-T9, n = 40), thoracolumbar SK (TLK group, apex T10-T12, n = 24), and controls...
April 19, 2017: European Spine Journal
https://www.readbyqxmd.com/read/28425054/can-a-three-component-prosthesis-be-used-for-conversion-of-painful-ankle-arthrodesis-to-total-ankle-replacement
#13
Markus Preis, Travis Bailey, Lucas S Marchand, Alexej Barg
BACKGROUND: In patients with painful ankle arthrodesis, the surgical treatment is challenging, and may include takedown of ankle arthrodesis and conversion to a total ankle replacement (TAR). This procedure is technically demanding given the altered anatomy after arthrodesis. Few studies have evaluated TAR in the setting of prior arthrodesis. QUESTIONS/PURPOSES: (1) What intraoperative and perioperative complications were observed in patients who underwent conversion of an ankle arthrodesis to a TAR? (2) Was durable fixation achieved at short term, and what was the alignment of the components? (3) What subsequent surgical procedures were performed, including revisions? (4) What improvements were observed in pain, tibiotalar range of motion (ROM), and quality of life? METHODS: Between January 2007 and December 2014, 18 patients with a painful ankle arthrodesis underwent conversion to TAR at our tertiary referral center...
April 19, 2017: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/28423412/brief-presentation-enhances-various-simultaneous-contrast-effects
#14
Sae Kaneko, Stuart Anstis, Ichiro Kuriki
Kaneko and Murakami (2012) demonstrated that simultaneous contrast for brightness and color (chromatic saturation) were enhanced by flashing the stimulus very briefly (10 ms). Here we examined whether this effect of duration generalized to other visual features. Tilt illusion and simultaneous hue contrast were both shown to be much stronger with a stimulus duration of 10 ms compared with 500 ms. The similar temporal dynamics for simultaneous contrast across visual features suggest common underlying principles...
April 1, 2017: Journal of Vision
https://www.readbyqxmd.com/read/28422686/an-integrated-movement-analysis-framework-to-study-upper-limb-function-a-pilot-study
#15
Kimberly Kontson, Ian Marcus, Barbara Myklebust, Eugene Civillico
The functional capabilities of individuals with upper limb disabilities are assessed throughout rehabilitation and treatment regimens using functional outcome measures. For the upper limb amputee population, there are none which quantitatively take into account the quality of movement while an individual is performing tasks. In this work, we demonstrate the use of an integrated movement analysis framework, based on motion capture and ground reaction force data, to capture quantitative information about how subjects complete a commonly used functional outcome measure, the Box and Blocks Test (BBT)...
April 12, 2017: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/28421741/uphill-water-transport-on-a-wettability-patterned-surface-experimental-and-theoretical-results
#16
Yuji Hirai, Hiroyuki Mayama, Yasutaka Matsuo, Masatsugu Shimomura
In nature, there exist a number of functional water-controlling surfaces, such as the water-repellent surface of lotus leaves, the superhydrophobic water-adhesive surface of rose petals, the water-harvesting surface of a beetle's back, and the water-transporting surface of the legs of Ligia exotica. These natural surfaces suggest that surface chemistry and hierarchical structures are essential for controlling water behavior. We have reported the preparation of superhydrophobic and anti-reflection silicon nanospike-array structures using self-organized honeycomb-patterned films as 3D dry etching masks...
April 19, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28420897/in-vivo-analysis-of-three-dimensional-dynamic-scapular-dyskinesis-in-scapular-or-clavicular-fractures
#17
Eugene Kim, Jai Hyung Park, Byeong-Ryong Han, Hee Jin Park, So Yeon Lee, Tsuyoshi Murase, Kazumi Sugamoto, Sumika Ikemoto, Se-Jin Park
The three-dimensional (3D) kinematics of the scapula were analyzed in vivo in 10 patients with scapular and 10 patients with clavicular fracture. Both the injured shoulder and normal contralateral shoulder were evaluated by computed tomography in the neutral and fully elevated positions. 3D rotational and translational movements of the scapula relative to the thorax during arm elevation were analyzed. A computer simulation program was used to compare rotational elevation/depression in the coronal plane, anterior/posterior tilting in the sagittal plane and protraction/retraction in the axial plane between the normal and affected sides...
April 2017: Acta Medica Okayama
https://www.readbyqxmd.com/read/28420175/a-new-input-device-for-spastics-based-on-strain-gauge
#18
Niels Buchhold, Christian Baumgartner
This article presents a new sensor for use by people with spastic disorders and similar conditions and enables them to steer and control medical devices such as electric powered wheelchairs. As spastic patients often suffer from cramping of their extremities, which can then no longer be controlled, using a standard joystick while operating a powered wheelchair can lead to dangerous situations. To prevent this, we designed a sensor based on strain gauges, which is shaped like a flat disc that can be operated using any body part...
April 17, 2017: Sensors
https://www.readbyqxmd.com/read/28419804/simultaneous-reconstruction-of-the-medial-and-lateral-collateral-ligaments-for-chronic-combined-ligament-injuries-of-the-ankle
#19
Toshito Yasuda, Hiroaki Shima, Katsunori Mori, Seiya Tsujinaka, Masashi Neo
BACKGROUND: Objective data on chronic injuries of the medial collateral ligament (MCL) of the ankle are scarce. Chronic MCL injuries are frequently associated with lateral collateral ligament (LCL) injuries. For patients with chronic combined MCL and LCL injuries, the authors have performed simultaneous surgery of the 2 ligaments. HYPOTHESIS: Simultaneous surgery of the 2 ligaments may be effectively used to treat chronic combined MCL and LCL injuries. STUDY DESIGN: Case series; Level of evidence, 4...
April 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28419567/cardiorespiratory-physiology-in-the-safe-passage-study-protocol-methods-and-normative-values-in-unexposed-infants
#20
Michael M Myers, Amy J Elliott, Hein J Odendaal, Larry Burd, Jyoti Angal, Coen Groenewald, J David Nugent, Joel S Yang, Joseph R Isler, Kim A Dukes, Fay Robinson, William P Fifer
AIM: The Safe Passage Study, conducted by the Prenatal Alcohol in SIDS and Stillbirth Network, is investigating contributions of prenatal alcohol exposure to fetal and infant demise. This current report presents physiological data from full term infants with no prenatal exposure to alcohol or maternal smoking. METHODS: Data are from 666 infants from the Northern Plains (North and South Dakota) and South Africa. A standardized protocol assessed cardiorespiratory function during baseline and head-up tilts shortly after birth and at 1 month of age...
April 17, 2017: Acta Paediatrica
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