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https://www.readbyqxmd.com/read/28731753/new-measurements-of-the-beam-normal-spin-asymmetries-at-large-backward-angles-with-hydrogen-and-deuterium-targets
#1
D Balaguer Ríos, K Aulenbacher, S Baunack, J Diefenbach, B Gläser, D von Harrach, Y Imai, E-M Kabuß, R Kothe, J H Lee, H Merkel, M C Mora Espí, U Müller, E Schilling, C Weinrich, L Capozza, F E Maas, J Arvieux, M A El-Yakoubi, R Frascaria, R Kunne, M Morlet, S Ong, J van de Wiele, S Kowalski, Y Prok
New measurements of the beam normal single spin asymmetry in the electron elastic and quasielastic scattering on the proton and deuteron, respectively, at large backward angles and at ⟨Q^{2}⟩=0.22  (GeV/c)^{2} and ⟨Q^{2}⟩=0.35  ( GeV/c)^{2} are reported. The experimentally observed asymmetries are compared with the theoretical calculation of Pasquini and Vanderhaeghen [Phys. Rev. C 70, 045206 (2004).PRVCAN0556-281310.1103/PhysRevC.70.045206]. The agreement of the measurements with the theoretical calculations shows a dominance of the inelastic intermediate excited states of the nucleon, πN and the Δ resonance...
July 7, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28717162/ultra-low-threshold-polariton-lasing-at-room-temperature-in-a-gan-membrane-microcavity-with-a-zero-dimensional-trap
#2
R Jayaprakash, F G Kalaitzakis, G Christmann, K Tsagaraki, M Hocevar, B Gayral, E Monroy, N T Pelekanos
Polariton lasers are coherent light sources based on the condensation of exciton-polaritons in semiconductor microcavities, which occurs either in the kinetic or thermodynamic (Bose-Einstein) regime. Besides their fundamental interest, polariton lasers have the potential of extremely low operating thresholds. Here, we demonstrate ultra-low threshold polariton lasing at room temperature, using an all-dielectric, GaN membrane-based microcavity, with a spontaneously-formed zero-dimensional trap. The microcavity is fabricated using an innovative method, which involves photo-electrochemical etching of an InGaN sacrificial layer and allows for the incorporation of optimally-grown GaN active quantum wells inside a cavity with atomically-smooth surfaces...
July 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28684147/knotless-transosseous-equivalent-rotator-cuff-repair-improves-biomechanical-self-reinforcement-without-diminishing-footprint-contact-compared-with-medial-knotted-repair
#3
Maxwell C Park, Alexander B Peterson, Michelle H McGarry, Chong J Park, Thay Q Lee
PURPOSE: To assess the effect of medial-row knots on self-reinforcement and footprint contact characteristics for transosseous-equivalent repair compared with the same construct without knots. METHODS: In 8 fresh-frozen human shoulders, transosseous-equivalent repairs with and without medial-row mattress knots were performed in each specimen. A pressure sensor was fixed at the tendon-footprint interface for all repairs. Parameters measured included footprint contact area, force, and pressure...
July 3, 2017: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/28669429/hybrid-photoacoustic-ultrasound-tomograph-for-real-time-finger-imaging
#4
Milan Oeri, Wolfgang Bost, Nicolas Sénégond, Steffen Tretbar, Marc Fournelle
We report a target-enclosing, hybrid tomograph with a total of 768 elements based on capacitive micromachined ultrasound transducer technology and providing fast, high-resolution 2-D/3-D photoacoustic and ultrasound tomography tailored to finger imaging. A freely programmable ultrasound beamforming platform sampling data at 80 MHz was developed to realize plane wave transmission under multiple angles. A multiplexing unit enables the connection and control of a large number of elements. Fast image reconstruction is provided by GPU processing...
June 29, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28656039/an-in-situ-usaxs-saxs-waxs-study-of-precipitate-size-distribution-evolution-in-a-model-ni-based-alloy
#5
Ross N Andrews, Joseph Serio, Govindarajan Muralidharan, Jan Ilavsky
Intermetallic γ' precipitates typically strengthen nickel-based superalloys. The shape, size and spatial distribution of strengthening precipitates critically influence alloy strength, while their temporal evolution characteristics determine the high-temperature alloy stability. Combined ultra-small-, small- and wide-angle X-ray scattering (USAXS-SAXS-WAXS) analysis can be used to evaluate the temporal evolution of an alloy's precipitate size distribution (PSD) and phase structure during in situ heat treatment...
June 1, 2017: Journal of Applied Crystallography
https://www.readbyqxmd.com/read/28655085/-effects-of-robot-assisted-minimally-invasive-transforaminal-lumbar-interbody-fusion-and-traditional-open-surgery-in-the-treatment-of-lumbar-spondylolisthesis
#6
G Y Cui, W Tian, D He, Y G Xing, B Liu, Q Yuan, Y Q Wang, Y Q Sun
Objective: To compare the clinical effects of robot-assisted minimally invasive transforaminal lumbar interbody fusion (TLIF) and traditional open TLIF in the treatment of lumbar spondylolisthesis. Methods: A total of 41 patients with lumbar spondylolisthesis accepted surgical treatment in Department of Spinal Surgery of Beijing Jishuitan Hospital From July 2015 to April 2016 were retrospectively analyzed. There were 16 cases accepted robot-assisted minimally invasive TLIF and 25 accepted traditional open TLIF...
July 1, 2017: Zhonghua Wai Ke za Zhi [Chinese Journal of Surgery]
https://www.readbyqxmd.com/read/28653744/estimates-of-genetic-parameters-and-genotypic-values-prediction-in-maize-landrace-populations-by-reml-blup-procedure
#7
D Baretta, M Nardino, I R Carvalho, A J de Pelegrin, M Ferrari, V J Szareski, W S Barros, V Q de Souza, A C de Oliveira, L C da Maia
The REML/BLUP statistics are analyses that can be used as selective criteria in the routine of maize breeding programs. The present study aims to determine the genetic potential in crosses of landrace populations applying the REML/BLUP methodology, and to identify populations for the synthesis of new populations and intrapopulation selection for family farming systems, as well as genetic constitutions for use in maize breeding programs. Nine top cross hybrids obtained in the 2012/2013 harvest were evaluated along with their testator, the landraces used as parents, and four commercial hybrids, in a randomized block design, with information taken from the average of each plot...
June 20, 2017: Genetics and Molecular Research: GMR
https://www.readbyqxmd.com/read/28652829/patellofemoral-pain-in-athletes
#8
REVIEW
Wolf Petersen, Ingo Rembitzki, Christian Liebau
Patellofemoral pain (PFP) is a frequent cause of anterior knee pain in athletes, which affects patients with and without structural patellofemoral joint (PFJ) damage. Most younger patients do not have any structural changes to the PFJ, such as an increased Q angle and a cartilage damage. This clinical entity is known as patellofemoral pain syndrome (PFPS). Older patients usually present with signs of patellofemoral osteoarthritis (PFOA). A key factor in PFPS development is dynamic valgus of the lower extremity, which leads to lateral patellar maltracking...
2017: Open Access Journal of Sports Medicine
https://www.readbyqxmd.com/read/28651052/inhomogeneity-in-ethylammonium-nitrate-acetonitrile-binary-mixtures-part-i-the-highest-low-q-excess-so-far-reported
#9
Alessandro Mariani, Ruggero Caminiti, Fabio Ramondo, Giovanna Salvitti, Francesca Mocci, Lorenzo Gontrani
The binary mixtures of the ionic liquid ethylammonium nitrate with acetonitrile have been studied by means of Wide and Small Angle X-ray Scattering and via two different computational methods, namely classical molecular dynamics and DFT. Our results show how the local arrangement is directly linked to the long-range structure. Moreover, we found once again a similarity in the physicochemical behaviour of ethylammonium nitrate and water.
June 26, 2017: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/28650754/structural-changes-in-the-lower-extremities-in-boys-aged-7-to-12-years-who-engage-in-moderate-physical-activityan-observational-longitudinal-study
#10
Gabriel Gijon-Nogueron, Salvador Diaz-Miguel, Eva Lopezosa-Reca, Jose Antonio Cervera-Marin
BACKGROUND: Physical activity in children may provide health benefits. We sought to consider the practice of soccer as a possible major factor in the development of the lower limb. The study is based on 3-year data for a group of children who practice this sport. METHODS: For 3 years we monitored 53 children who practiced soccer 3 times a week and had engaged in 2 years of continuous sports activity. Their mean ± SD age was 8.49 ± 2.01 years in the first year...
May 2017: Journal of the American Podiatric Medical Association
https://www.readbyqxmd.com/read/28648068/redox-activity-of-oxo-bridged-iridium-dimers-in-an-n-o-donor-environment-characterization-of-remarkably-stable-ir-iv-v-complexes
#11
Shashi Bhushan Sinha, Dimitar Y Shopov, Liam S Sharninghausen, Christopher J Stein, Brandon Q Mercado, David Balcells, Thomas Bondo Pedersen, Markus Reiher, Gary W Brudvig, Robert H Crabtree
Chemical and electrochemical oxidation or reduction of our recently reported Ir(IV,IV) mono-μ-oxo dimers results in the formation of fully characterized Ir(IV,V) and Ir(III,III) complexes. The Ir(IV,V) dimers are unprecedented and exhibit remarkable stability under ambient conditions. This stability and modest reduction potential of 0.99 V vs NHE is in part attributed to complete charge delocalization across both Ir centers. Trends in crystallographic bond lengths and angles shed light on the structural changes accompanying oxidation and reduction...
July 5, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28642619/understanding-the-unusual-response-to-high-pressure-in-kbe2bo3f2
#12
D H Yu, M Avdeev, D H Sun, L Q Huston, Thomas B Shiell, Q B Sun, T Lu, Q Gu, H Liu, J E Bradby, N Yie, Y Liu, J Y Wang, G J McIntyre
Strong anisotropic compression with pressure on the remarkable non-linear optical material KBe2BO3F2 has been observed with the linear compression coefficient along the c axis found to be about 40 times larger than that along the a axis. An unusual non-monotonic pressure response was observed for the a lattice parameter. The derived bulk modulus of 31 ± 1 GPa indicates that KBe2BO3F2 is a very soft oxide material yet with stable structure up to 45 GPa. A combination of high-pressure synchrotron powder X-ray diffraction, high-pressure Raman spectroscopy, and Density Functional Theory calculations points to the mechanism for the unusual pressure response being due to the competition between the K-F bond length and K-F-K bond angle and the coupling between the stretching and twisting vibration modes...
June 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28628922/observation-of-three-component-fermions-in-the-topological-semimetal-molybdenum-phosphide
#13
B Q Lv, Z-L Feng, Q-N Xu, X Gao, J-Z Ma, L-Y Kong, P Richard, Y-B Huang, V N Strocov, C Fang, H-M Weng, Y-G Shi, T Qian, H Ding
In quantum field theory, Lorentz invariance leads to three types of fermion-Dirac, Weyl and Majorana. Although the existence of Weyl and Majorana fermions as elementary particles in high-energy physics is debated, all three types of fermion have been proposed to exist as low-energy, long-wavelength quasiparticle excitations in condensed-matter systems. The existence of Dirac and Weyl fermions in condensed-matter systems has been confirmed experimentally, and that of Majorana fermions is supported by various experiments...
June 29, 2017: Nature
https://www.readbyqxmd.com/read/28624835/cbct-location-of-the-fusion-between-the-buccal-and-lingual-cortical-in-the-mandibular-ramus-importance-to-sagittal-split-osteotomy
#14
L Scomparin, M-Q-S Soares, C-M-F Rubira, R-Y-F Yaedú, T-S-N Imada, B-S Centurion, E-S Tolentino, J-R-P Lauris, I-R-F Rubira-Bullen
BACKGROUND: Mandibular Sagittal Split Osteotomy (MSSO) is a popular technique in orthognathic surgery used both to advance and to retreat the mandible. However, MSSO may incur in important complications, such as bad splits and sensorineural injuries. Knowing the location of the fusion between the buccal and lingual cortical (FBLC) in the mandibular ramus and the bone thickness in the region where osteotomies will be performed is determinant in MSSO planning to avoid complications. The aim of this study was to document and evaluate possible differences between sexes regarding the location of the FBLC in relation to the superior cortical of mandibular foramen (MF) and bone thickness in the region of interest for MSSO in a Brazilian population...
July 1, 2017: Medicina Oral, Patología Oral y Cirugía Bucal
https://www.readbyqxmd.com/read/28624557/arthroscopic-lateral-retinacular-release-medial-retinacular-plication-and-partial-medial-tibial-tubercle-transfer-for-recurrent-patellar-dislocation
#15
Song Chen, Yiqin Zhou, Qirong Qian, Yuli Wu, Peiliang Fu, Haishan Wu
OBJECTIVE: To assess the efficacy of a therapeutic protocol composed of arthroscopic lateral retinacular release, medial retinacular plication, and partial medial tibial tuberosity transfer for patients with recurrent patellar dislocation. METHOD: 71 patients, 11 males and 60 females and a total of 77 knees, with recurrent dislocation of the patella were enrolled between 1998 and 2012. The average age of the patients was 19.5 years and 67 of them had previous knee trauma history...
June 15, 2017: International Journal of Surgery
https://www.readbyqxmd.com/read/28619477/a-novel-body-frame-based-approach-to-aerospacecraft-attitude-tracking
#16
Carlos Ma, Michael Z Q Chen, James Lam, Kie Chung Cheung
In the common practice of designing an attitude tracker for an aerospacecraft, one transforms the Newton-Euler rotation equations to obtain the dynamic equations of some chosen inertial frame based attitude metrics, such as Euler angles and unit quaternions. A Lyapunov approach is then used to design a controller which ensures asymptotic convergence of the attitude to the desired orientation. Although this design methodology is pretty standard, it usually involves singularity-prone coordinate transformations which complicates the analysis process and controller design...
June 12, 2017: ISA Transactions
https://www.readbyqxmd.com/read/28614155/the-role-of-the-back-plate-in-angle-anatomy-with-the-boston-type-i-keratoprosthesis
#17
Elise V Taniguchi, Eleftherios I Paschalis, Alja Crnej, Ai Ren, Kathryn A Colby, James Chodosh, Louis R Pasquale, Lucy Q Shen, Claes H Dohlman, Andrea Cruzat
PURPOSE: To quantitatively evaluate the angle anatomy in eyes with the Boston type I keratoprosthesis (B-KPro) differing in the back plate (BP) material and size using anterior segment optical coherence tomography. METHODS: B-KPro eyes with poly(methyl methacrylate) (PMMA) (7.0 and 8.5 mm) and titanium (7.0, 8.5, and 9.5 mm) BPs were imaged with anterior segment optical coherence tomography. The angle opening distance at 500 μm from the scleral spur (AOD500), trabecular iris surface area at 500 μm from the scleral spur (TISA500), and trabecular iris angle at 500 μm from the scleral spur (TIA500) were measured...
June 13, 2017: Cornea
https://www.readbyqxmd.com/read/28606263/-three-dimensional-vector-analysis-after-decompression-surgery-in-thyroid-associated-ophthalmopathy
#18
J Guo, J Qian, X F Li, F X Meng, R Q Ma
Objective: To analyze the change of globe position after different orbital decompression in thyroid-associated ophthalmopathy (TAO). Methods: It was a retrosective case series study. Twenty-nine TAO patients (33 eyes) underwent orbital decompression were collected between October 2014 and December 2016 at Eye & ENT Hospital of Fudan University. There were 17 males and 12 females, and the average age was 46 years (ranging from 21 to 66 years). Fifteen patients (17 eyes) underwent balanced decompression, 11 patients (11 eyes) underwent deep lateral decompression, and 4 patients (5 eyes) underwent medial decompression...
June 11, 2017: [Zhonghua Yan Ke za Zhi] Chinese Journal of Ophthalmology
https://www.readbyqxmd.com/read/28599510/experimental-research-on-stability-and-natural-convection-of-tio2-water-nanofluid-in-enclosures-with-different-rotation-angles
#19
Cong Qi, Guiqing Wang, Yifeng Ma, Leixin Guo
The stability and natural convection heat transfer characteristics of TiO2-water nanofluid in enclosures with different rotation angles (α = -45°, α = 0°, α = 45°, and α = 90°) are experimentally investigated. The effects of different pH values and doses (m) of dispersant agent on the stability of TiO2-water nanofluid are investigated. It is found that TiO2-water nanofluid with m = 6 wt% and pH = 8 has the lowest transmittance and has the best stability. The effects of different rotation angles (α = -45°, α = 0°, α = 45°, and α = 90°), nanoparticle mass fractions (wt% = 0...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28595130/cyclotorsion-measurement-using-scleral-blood-vessels
#20
Aydın Kaya, Ali Seydi Keçeli, Ahmet Burak Can, Hasan Basri Çakmak
BACKGROUND AND OBJECTIVES: Measurements of the cyclotorsional movement of the eye are crucial in refractive surgery procedures. The planned surgery pattern may vary substantially during an operation because of the position and eye movements of the patient. Since these factors affect the outcome of an operation, eye registration methods are applied in order to compensate for errors. While the majority of applications are based on features of the iris, we propose a registration method which uses scleral blood vessels...
June 1, 2017: Computers in Biology and Medicine
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