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https://www.readbyqxmd.com/read/28548857/experimental-demonstration-of-complete-180-o-reversal-of-magnetization-in-isolated-co-nanomagnets-on-a-pmn-pt-substrate-with-voltage-generated-strain
#1
Ayan Kumar Biswas, Hasnain Ahmad, Jayasimha Atulasimha, Supriyo Bandyopadhyay
Rotating the magnetization of a shape anisotropic magnetostrictive nanomagnet with voltage-generated stress/strain dissipates much less energy than most other magnetization rotation schemes, but its application to writing bits in non-volatile magnetic memory has been hindered by the fundamental inability of stress/strain to rotate magnetization by full 180(o). Normally, stress/strain can rotate the magnetization of a shape anisotropic elliptical nanomagnet by only up to 90(o), resulting in incomplete magnetization reversal...
May 26, 2017: Nano Letters
https://www.readbyqxmd.com/read/28548848/quantum-mechanical-study-of-the-reaction-mechanism-for-2%C3%AF-2%C3%AF-cycloaddition-of-fluorinated-methylene-groups
#2
Andrew R Motz, Andrew M Herring, Shubham Vyas, C Mark Maupin
Perfluorocyclobutyl polymers are thermally and chemically stable, may be produced without a catalyst via thermal 2π-2π cycloaddition, and can form block structures making them suitable for commercialization of specialty polymers. Thermal 2π-2π cycloaddition is a rare reaction that starts in the singlet state and proceeds through a triplet intermediate forming an energetically stable 4 membered ring in the singlet state. This reaction involves two changes in spin state and thus two spin-crossover transitions...
May 26, 2017: Journal of Organic Chemistry
https://www.readbyqxmd.com/read/28548698/novel-porcine-experimental-model-of-severe-progressive-thoracic-scoliosis-with-compensatory-curves-induced-by-interpedicular-bent-rigid-temporary-tethering
#3
Carlos Barrios, José Miguel Lloris, Juan Alonso, Borja Maruenda, Jesús Burgos, Rafael Llombart-Blanco, Luis Gil, Viviana Bisbal
Using flexible tethering techniques, porcine models of experimental scoliosis have shown scoliotic curves with vertebral wedging but very limited axial rotation. The aim of this experimental work was to induce a severe progressive scoliosis in a growing porcine model for research purposes. A unilateral spinal bent rigid tether was anchored to two ipsilateral pedicle screws in eight pigs. The spinal tether was removed after 8 weeks. Ten weeks later, the animals were sacrificed. Conventional radiographs and 3D CT-scans were taken to evaluate changes in the alignment of the thoracic spine...
May 26, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28548529/resonances-in-the-field-angle-resolved-thermal-conductivity-of-cecoin_-5
#4
Duk Y Kim, Shi-Zeng Lin, Franziska Weickert, Eric D Bauer, Filip Ronning, J D Thompson, Roman Movshovich
The thermal conductivity measurement in a rotating magnetic field is a powerful probe of the structure of the superconducting energy gap. We present high-precision measurements of the low-temperature thermal conductivity in the unconventional heavy-fermion superconductor CeCoIn_{5}, with the heat current J along the nodal [110] direction of its d_{x^{2}-y^{2}} order parameter and the magnetic field up to 7 T rotating in the ab plane. In contrast to the smooth oscillations found previously for J∥[100], we observe a sharp resonancelike peak in the thermal conductivity when the magnetic field is also in the [110] direction, parallel to the heat current...
May 12, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28548514/velocity-distribution-of-a-homogeneously-driven-two-dimensional-granular-gas
#5
Christian Scholz, Thorsten Pöschel
The theory of homogeneously driven granular gases of hard particles predicts that the stationary state is characterized by a velocity distribution function with overpopulated high-energy tails as compared to the exponential decay valid for molecular gases. While this fundamental theoretical result was confirmed by numerous numerical simulations, an experimental confirmation is still missing. Using self-rotating active granular particles, we find a power-law decay of the velocity distribution whose exponent agrees well with the theoretic prediction...
May 12, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28548511/solitons-in-bose-einstein-condensates-with-helicoidal-spin-orbit-coupling
#6
Yaroslav V Kartashov, Vladimir V Konotop
We report on the existence and stability of freely moving solitons in a spatially inhomogeneous Bose-Einstein condensate with helicoidal spin-orbit (SO) coupling. In spite of the periodically varying parameters, the system allows for the existence of stable propagating solitons. Such states are found in the rotating frame, where the helicoidal SO coupling is reduced to a homogeneous one. In the absence of the Zeeman splitting, the coupled Gross-Pitaevskii equations describing localized states feature many properties of the integrable systems...
May 12, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28548505/experimental-demonstration-of-a-cheap-and-accurate-phase-estimation
#7
Kenneth Rudinger, Shelby Kimmel, Daniel Lobser, Peter Maunz
We demonstrate an experimental implementation of robust phase estimation (RPE) to learn the phase of a single-qubit rotation on a trapped Yb^{+} ion qubit. We show this phase can be estimated with an uncertainty below 4×10^{-4}  rad using as few as 176 total experimental samples, and our estimates exhibit Heisenberg scaling. Unlike standard phase estimation protocols, RPE neither assumes perfect state preparation and measurement, nor requires access to ancillae. We crossvalidate the results of RPE with the more resource-intensive protocol of gate set tomography...
May 12, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28548389/night-shift-work-is-associated-with-poorer-glycaemic-control-in-patients-with-type-2-diabetes
#8
Areesa Manodpitipong, Sunee Saetung, Hataikarn Nimitphong, Nantaporn Siwasaranond, Thanawat Wongphan, Chotima Sornsiriwong, Pranee Luckanajantachote, Prasitchai Mangjit, Prasit Keesukphan, Stephanie J Crowley, Megan M Hood, Sirimon Reutrakul
The circadian system plays a role in regulating metabolism. Night-shift work, a form of circadian misalignment, is associated with increased type 2 diabetes risk. This study aimed to determine if night-shift workers with type 2 diabetes experience poorer glycaemic control than non-shift workers. Patients with type 2 diabetes (104 unemployed, 85 day workers and 60 night-shift workers) participated. Sleep duration, sleep quality, morningness-eveningness preference, depressive symptoms and dietary intake were assessed using standardized questionnaires...
May 26, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28548290/metacarpal-growth-during-adolescence-in-a-longitudinal-south-african-cohort
#9
A Magan, L H Nyati, L K Micklesfield, S A Norris, J M Pettifor
To monitor the drift of the periosteal and endocortical surfaces during metacarpal growth longitudinally, radiogrammetry was carried out on hand-wrist x-rays of 572 children from the Birth to Twenty Bone Health Cohort annually from ages 9-21 years. This is the largest collection of longitudinal x-rays in African children. The 2(nd) metacarpal bone length, bone width and medullary width were measured using digital vernier callipers on a total of 4730 x-rays. Superimposition by Translation and Rotation (SITAR) was used to obtain age at peak metacarpal length velocity (PLV)...
May 26, 2017: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
https://www.readbyqxmd.com/read/28548148/diverse-configurations-of-columnar-liquid-crystals-in-cylindrical-nano-and-micropores
#10
Rui-Bin Zhang, Goran Ungar, Xiangbing Zeng, Zhihao Shen
Using 2D X-ray diffraction and AFM we studied the configuration, in cylindrical confinement, of hexagonal columnar phases that anchor homeotropically, i.e. with the columns normal to the pore wall. A wide range of pore diameters, from 20 nm to 100 μm, were explored by employing anodic alumina membranes and glass capillaries. The compounds used were a small discotic, hexakis(hexyloxy)triphenylene (HAT6), a large discotic hexa-peri-hexabenzocoronene (HBC), and a T-shaped bolaamphiphile, forming a honeycomb-type columnar phase...
May 26, 2017: Soft Matter
https://www.readbyqxmd.com/read/28547923/pediatric-heart-disease-simulation-curriculum-educating-the-pediatrician
#11
Tyler H Harris, Mark Adler, Sharon M Unti, Mary E McBride
BACKGROUND: Training guidelines state that pediatricians should be able to diagnose, manage, and triage patients with heart disease. Acutely ill cardiac patients present infrequently and with high acuity, yet residents receive less exposure to acute cardiac conditions than previous generations. Trainees must learn to manage these situations despite this gap. Simulation has been used successfully to train learners to provide acute care. We hypothesized that a simulation-based cardiac curriculum would improve residents' ability to manage cardiac patients...
May 26, 2017: Congenital Heart Disease
https://www.readbyqxmd.com/read/28547676/femoral-malrotation-after-surgical-treatment-of-femoral-shaft-fractures-in-children-a-retrospective-ct-based-analysis
#12
Christian Zeckey, Fergal Monsell, Mark Jackson, Philipp Mommsen, Musa Citak, Christian Krettek, Mohamed Omar
BACKGROUND: Rotational malalignment is an important and not always avoidable complication after surgical treatment of femoral shaft fractures. The purpose of this study was to determine the incidence of rotational malalignment in children after surgical treatment of femoral shaft fractures and to identify potential patient- and treatment-related risk factors based on data obtained from CT scans. METHODS: We conducted a retrospective analysis of all patients aged less than 15 years with femoral shaft fractures admitted to our level 1 trauma centre between January 2004 and July 2014...
May 25, 2017: European Journal of Orthopaedic Surgery & Traumatology: Orthopédie Traumatologie
https://www.readbyqxmd.com/read/28547587/new-quantitative-radiographic-parameters-for-vertical-and-horizontal-instability-in-acromioclavicular-joint-dislocations
#13
Matthias A Zumstein, Philippe Schiessl, Benedikt Ambuehl, Lilianna Bolliger, Johannes Weihs, Martin H Maurer, Beat K Moor, Michael Schaer, Sumit Raniga
PURPOSE: The aim of this study was to identify the most accurate and reliable quantitative radiographic parameters for assessing vertical and horizontal instability in different Rockwood grades of acromioclavicular joint (ACJ) separations. Furthermore, the effect of projectional variation on these parameters was investigated in obtaining lateral Alexander view radiographs. METHODS: A Sawbone model of a scapula with clavicle was mounted on a holding device, and acromioclavicular dislocations as per the Rockwood classification system were simulated with the addition of horizontal posterior displacement...
May 25, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28547576/thoraco-lumbar-selective-fusion-in-adolescent-idiopathic-scoliosis-with-lenke-c-modifier-curves-clinical-and-radiographic-analysis-at-10-year-follow-up
#14
Laura Scaramuzzo, Fabrizio Giudici, Daniele Bongetta, Eleonora Caboni, Leone Minoia, Antonino Zagra
PURPOSE: To examine the radiological and clinical outcomes of a single-center case series of selective thoracic fusions (STF) in adolescent idiopathic scoliosis with Lenke C modifier curves, with a long-term follow-up. METHODS: We evaluated at 6 months and 10 years different radiological parameters on both thoracic and lumbar districts: coronal curves, sagittal curves, apical vertebral translation (AVT), and apical vertebral rotation (AVR). The clinical outcome was determined using the SRS 22 score...
May 25, 2017: European Spine Journal
https://www.readbyqxmd.com/read/28547137/age-dependent-arthrosonographic-reference-values-of-the-hip-joint-in-healthy-children-and-adolescents-a-cross-sectional-multicenter-ultrasound-study
#15
Ralf Felix Trauzeddel, Hartwig Lehmann, Daniel Windschall, Gerd Ganser, Rainer Berendes, Maria Haller, Manuela Krumrey-Langkammerer, Katharina Palm-Beden, Antje Nimtz-Talaska, Christine Nirschl, Phillip Schoof, Ralf Trauzeddel
BACKGROUND: Musculoskeletal US is a noninvasive imaging method for diagnosing and monitoring inflammatory rheumatic diseases. OBJECTIVES: To develop age- and gender-related arthrosonographic reference intervals for the hip joint of healthy children and adolescents. MATERIALS AND METHODS: In a cross-sectional US study, we examined both hip joints of 445 children and adolescents with an age range of 1 year to 18 years. We measured the distance between the bone surface and the outer margin of the joint capsule to define the bone-capsule distance, the joint capsule and cartilage thickness, and the capsule layer thickness...
May 25, 2017: Pediatric Radiology
https://www.readbyqxmd.com/read/28546214/rna-polymerase-motions-during-promoter-melting
#16
Andrey Feklistov, Brian Bae, Jesse Hauver, Agnieszka Lass-Napiorkowska, Markus Kalesse, Florian Glaus, Karl-Heinz Altmann, Tomasz Heyduk, Robert Landick, Seth A Darst
All cellular RNA polymerases (RNAPs), from those of bacteria to those of man, possess a clamp that can open and close, and it has been assumed that the open RNAP separates promoter DNA strands and then closes to establish a tight grip on the DNA template. Here, we resolve successive motions of the initiating bacterial RNAP by studying real-time signatures of fluorescent reporters placed on RNAP and DNA in the presence of ligands locking the clamp in distinct conformations. We report evidence for an unexpected and obligatory step early in the initiation involving a transient clamp closure as a prerequisite for DNA melting...
May 26, 2017: Science
https://www.readbyqxmd.com/read/28545718/the-effect-of-glenoid-component-version-and-humeral-polyethylene-liner-rotation-on-subluxation-and-impingement-in-reverse-shoulder-arthroplasty
#17
Vijay N Permeswaran, Andrea Caceres, Jessica E Goetz, Donald D Anderson, Carolyn M Hettrich
BACKGROUND: A previously validated finite element modeling approach was used to determine how changes in glenoid component version and polyethylene liner rotation within the humeral component affect the arm abduction angle at which impingement between the inferior glenoid and the polyethylene liner occurs as well as the amount of subluxation generated by that impingement. MATERIALS AND METHODS: Five glenoid component versions (5° anteversion; neutral; 5°, 10°, and 20° retroversion) and 7 polyethylene liner rotations (20° and 10° anterior; neutral; 10°, 20°, 30°, and 40° posterior) were considered, resulting in 35 different clinically representative models...
May 22, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28545717/preseason-screening-of-shoulder-range-of-motion-and-humeral-retrotorsion-does-not-predict-injury-in-high-school-baseball-players
#18
Sakiko Oyama, Elizabeth E Hibberd, Joseph B Myers
BACKGROUND: Shoulder and elbow injuries are commonplace in high school baseball. Although altered shoulder range of motion (ROM) and humeral retrotorsion angles have been associated with injuries, the efficacy of preseason screening of these characteristics remains controversial. METHODS: We conducted preseason screenings for shoulder internal and external rotation ROM and humeral retrotorsion on 832 high school baseball players and tracked their exposure and incidence on throwing-related shoulder and elbow injuries during a subsequent season...
May 22, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28545684/mri-of-cystic-fibrosis-lung-manifestations-sequence-evaluation-and-clinical-outcome-analysis
#19
O Scholz, T Denecke, J Böttcher, C Schwarz, H-J Mentzel, F Streitparth, M H Maurer, A Pfeil, A Huppertz, A Mehl, D Staab, B Hamm, D M Renz
AIM: To evaluate different magnetic resonance imaging (MRI) sequences for diagnosis of pulmonary manifestations of cystic fibrosis (CF) in comparison to chest computed tomography (CT), including an extended outcome analysis. MATERIALS AND METHODS: Twenty-eight patients with CF (15 male, 13 female, mean age 30.5±9.4 years) underwent CT and MRI of the lung. MRI (1.5 T) included different T2- and T1-weighted sequences: breath-hold HASTE (half Fourier acquisition single shot turbo spin echo) and VIBE (volumetric interpolated breath-hold examination, before and after contrast medium administration) sequences and respiratory-triggered PROPELLER (periodically rotated overlapping parallel lines with enhanced reconstruction) sequences with and without fat signal suppression, and perfusion imaging...
May 22, 2017: Clinical Radiology
https://www.readbyqxmd.com/read/28545560/influences-of-lumbar-disc-herniation-on-the-kinematics-in-multi-segmental-spine-pelvis-and-lower-extremities-during-five-activities-of-daily-living
#20
Shengzheng Kuai, Wenyu Zhou, Zhenhua Liao, Run Ji, Daiqi Guo, Rui Zhang, Weiqiang Liu
BACKGROUND: Low back pain (LBP) is a common problem that can contribute to motor dysfunction. Previous studies reporting the changes in kinematic characteristics caused by LBP present conflicting results. This study aimed to apply the multisegmental spinal model to investigate the kinematic changes in patients with lumbar disc herniation (LDH) during five activities of daily living (ADLs). METHODS: Twenty-six healthy subjects and 7 LDH patients participated in this study and performed level walking, stair climbing, trunk flexion, and ipsilateral and contralateral pickups...
May 25, 2017: BMC Musculoskeletal Disorders
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