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https://www.readbyqxmd.com/read/28076877/ultrasound-imaging-for-ovarian-and-deep-infiltrating-endometriosis
#1
Caterina Exacoustos, Errico Zupi, Emilio Piccione
The main challenges of imaging for endometriosis are the detection of nonovarian disease and the evaluation of the extension of the disease into pelvic structures. Transvaginal ultrasonography (TVS) has been proposed as the first-line imaging technique because it allows extensive exploration of the pelvis. The "typical" endometrioma is a unilocular cyst with homogeneous low-level echogenicity (ground glass echogenicity) of the cyst fluid. The use of color Doppler helps avoid classifying malignancies as endometriomas, defining the presence of vascular flow in papillations...
January 11, 2017: Seminars in Reproductive Medicine
https://www.readbyqxmd.com/read/28060177/influence-of-insurance-type-on-the-access-to-pediatric-care-for-children-with-distal-radius-torus-fractures
#2
Harrison Potak, Christopher A Iobst
BACKGROUND: Previous literature has demonstrated that pediatric orthopaedic patients with private insurance have less difficulty obtaining appointments than those with Medicaid. Not all injuries of an orthopaedic nature, however, require specialist care. This study evaluated the willingness of pediatricians to provide care for minor orthopaedic injuries and whether or not the patient's insurance status influenced the decision to provide care. METHODS: Ninety-nine pediatric primary care offices were randomly selected from 2 regions in Florida...
January 5, 2017: Journal of Pediatric Orthopedics
https://www.readbyqxmd.com/read/28059129/dynamics-of-ferrofluidic-flow-in-the-taylor-couette-system-with-a-small-aspect-ratio
#3
Sebastian Altmeyer, Younghae Do, Ying-Cheng Lai
We investigate fundamental nonlinear dynamics of ferrofluidic Taylor-Couette flow - flow confined be-tween two concentric independently rotating cylinders - consider small aspect ratio by solving the ferro-hydrodynamical equations, carrying out systematic bifurcation analysis. Without magnetic field, we find steady flow patterns, previously observed with a simple fluid, such as those containing normal one- or two vortex cells, as well as anomalous one-cell and twin-cell flow states. However, when a symmetry-breaking transverse magnetic field is present, all flow states exhibit stimulated, finite two-fold mode...
January 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28025052/holding-visual-attention-for-400millionyears-a-model-of-tectum-and-torus-longitudinalis-in-teleost-fishes
#4
David P M Northmore
Only ray-finned fishes possess a torus longitudinalis (TL), a paired, elongated body attached to the medial margins of the optic tectum. Its granule cells project large numbers of fine fibers running laterally over adjacent tectum, synapsing excitatorily on the spiny dendrites of pyramidal cells. Sustained TL activity is evoked visuotopically by dark stimuli; TL bursting is a corollary discharge of saccadic eye movements. To suggest a function for this ancient structure, neural network models were constructed to show that: (1) pyramidal cells could form an attentional locus, selecting one out of several moving objects to track, but rapid image shifts caused by saccades disrupt tracking; (2) TL could supply both the pre-saccade position of a locus, and the shift predicted from a saccade so as to prime pyramidal dendrites at the target location, ensuring the locus stays with the attended object; (3) that the specific pattern of synaptic connections required for such predictive priming could be learned by an unsupervised rule; (4) temporal and spatial filtering of visual pattern input to TL allows learning from a complex scene...
January 3, 2017: Vision Research
https://www.readbyqxmd.com/read/28024311/lost-in-translation-the-search-for-an-in-vitro-screen-for-spermatogenic-toxicity
#5
Robert E Chapin, Timothy Winton, William Nowland, Nichole Danis, Steven Kumpf, Kjell Johnson, Aleasha Coburn, Jan-Bernd Stukenborg
The last two decades have seen an increasing search for in vitro models that can replace the use of animals for safety testing. We adapted the methods from a recent nonquantitative report of spermatogenesis occurring in ex vivo mouse testis explants and tried to develop them into a screening assay. The model consisted of small pieces of neonatal mouse testis (testis "chunks"), explanted and placed on pillars of agarose or chamber inserts, and cultured at the air-liquid interface. A peripheral torus-shaped zone in these explants would often contain tubules showing spermatogenesis, while the middle of each chunk was often necrotic, depending on the thickness of the tissue...
December 2016: Birth Defects Research. Part B, Developmental and Reproductive Toxicology
https://www.readbyqxmd.com/read/28019660/high-dose-per-pulse-electron-beam-dosimetry-usability-and-dose-rate-independence-of-ebt3-gafchromic-films
#6
Maud Jaccard, Kristoffer Petersson, Thierry Buchillier, Jean-François Germond, Maria Teresa Duran Ramiro, Marie-Catherine Vozenin, Jean Bourhis, François Bochud, Claude Bailat
PURPOSE: The aim of this study was to assess the suitability of Gafchromic EBT3 films for reference dose measurements in the beam of a prototype high dose-per-pulse linear accelerator (linac), capable of delivering electron beams with a mean dose-rate (Ḋm ) ranging from 0.07 to 3000 Gy/s and a dose-rate in pulse (Ḋp ) of up to 8·10(6)  Gy/s. To do this, we evaluated the overall uncertainties in EBT3 film dosimetry as well as the energy and dose-rate dependence of their response...
December 26, 2016: Medical Physics
https://www.readbyqxmd.com/read/28004736/quantum-phase-transition-induced-by-real-space-topology
#7
C Li, G Zhang, S Lin, Z Song
A quantum phase transition (QPT), including both topological and symmetry breaking types, is usually induced by the change of global parameters, such as external fields or global coupling constants. In this work, we demonstrate the existence of QPT induced by the real-space topology of the system. We investigate the groundstate properties of the tight-binding model on a honeycomb lattice with the torus geometry based on exact results. It is shown that the ground state experiences a second-order QPT, exhibiting the scaling behavior, when the torus switches to a tube, which reveals the connection between quantum phase and the real-space topology of the system...
December 22, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27967158/finite-size-corrections-and-scaling-for-the-dimer-model-on-the-checkerboard-lattice
#8
Nickolay Sh Izmailian, Ming-Chya Wu, Chin-Kun Hu
Lattice models are useful for understanding behaviors of interacting complex many-body systems. The lattice dimer model has been proposed to study the adsorption of diatomic molecules on a substrate. Here we analyze the partition function of the dimer model on a 2M×2N checkerboard lattice wrapped on a torus and derive the exact asymptotic expansion of the logarithm of the partition function. We find that the internal energy at the critical point is equal to zero. We also derive the exact finite-size corrections for the free energy, the internal energy, and the specific heat...
November 2016: Physical Review. E
https://www.readbyqxmd.com/read/27958247/prevalence-of-mandibular-and-palatine-tori-among-the-ibos-in-enugu-south-east-nigeria
#9
S N Maduakor, M C Nwoga
CONTEXT: Torus mandibularis (TM) and torus palatinus (TP) are believed to occur commonly among black Africans. There is a dearth of literature on Nigerians. The few reported studies were done in the South-West Nigeria. This is the first report of the prevalence of tori among the Ibo-speaking ethnic group in the South-East Nigeria. SETTINGS AND DESIGN: This is a prospective cross-sectional study of 3000 subjects of Ibo ethnic extraction attending a dental clinic in Enugu, South-East Nigeria...
January 2017: Nigerian Journal of Clinical Practice
https://www.readbyqxmd.com/read/27935127/outer-surface-interactions-of-cucurbit-6-uril-triggered-supramolecular-three-dimensional-polycatenanes
#10
Xinlong Ni
A cucurbit[6]uril (Q[6] or CB[6]) outer surface interactions based supramolecular three-dimensional (3D) infinite polycatenated triply-linked cage with 3-torus topology is reported. The arrangement of the poly-interlocked supramolecular framework is evidently stabilized by a favorable combination of weak non-covalent interactions such as hydrophobic effects, hydrogen bonding, ion-dipole interaction, and C-H***Cl interactions in the sold state. Further study suggested that such 3D poly-interlocked species could be rapidly precipitated from the mixture solution in high yield owing to electrostatic interaction of the [CdCl4]2- anion with the electropositive outer surface of Q[6] host...
December 9, 2016: Chemistry: a European Journal
https://www.readbyqxmd.com/read/27911517/universal-signatures-of-quantum-critical-points-from-finite-size-torus-spectra-a-window-into-the-operator-content-of-higher-dimensional-conformal-field-theories
#11
Michael Schuler, Seth Whitsitt, Louis-Paul Henry, Subir Sachdev, Andreas M Läuchli
The low-energy spectra of many body systems on a torus, of finite size L, are well understood in magnetically ordered and gapped topological phases. However, the spectra at quantum critical points separating such phases are largely unexplored for (2+1)D systems. Using a combination of analytical and numerical techniques, we accurately calculate and analyze the low-energy torus spectrum at an Ising critical point which provides a universal fingerprint of the underlying quantum field theory, with the energy levels given by universal numbers times 1/L...
November 18, 2016: Physical Review Letters
https://www.readbyqxmd.com/read/27910690/upgrading-a-high-throughput-spectrometer-for-high-frequency-400-khz-measurements
#12
T Nishizawa, M D Nornberg, D J Den Hartog, D Craig
The upgraded spectrometer used for charge exchange recombination spectroscopy on the Madison Symmetric Torus resolves emission fluctuations up to 400 kHz. The transimpedance amplifier's cutoff frequency was increased based upon simulations comparing the change in the measured photon counts for time-dynamic signals. We modeled each signal-processing stage of the diagnostic and scanned the filtering frequency to quantify the uncertainty in the photon counting rate. This modeling showed that uncertainties can be calculated based on assuming each amplification stage is a Poisson process and by calibrating the photon counting rate with a DC light source to address additional variation...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27910686/a-comparison-between-soft-x-ray-and-magnetic-phase-data-on-the-madison-symmetric-torus
#13
P D VanMeter, P Franz, L M Reusch, J S Sarff, D J Den Hartog
The Soft X-Ray (SXR) tomography system on the Madison Symmetric Torus uses four cameras to determine the emissivity structure of the plasma. This structure should directly correspond to the structure of the magnetic field; however, there is an apparent phase difference between the emissivity reconstructions and magnetic field reconstructions when using a cylindrical approximation. The difference between the phase of the dominant rotating helical mode of the magnetic field and the motion of the brightest line of sight for each SXR camera is dependent on both the camera viewing angle and the plasma conditions...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27910682/publisher-s-note-electron-density-profile-measurements-from-hydrogen-line-intensity-ratio-method-in-versatile-experiment-spherical-torus-rev-sci-instrum-87-11e540-2016
#14
YooSung Kim, Yue-Jiang Shi, Jeong-Hun Yang, SeongCheol Kim, Young-Gi Kim, Jeong-Jeung Dang, Seongmoo Yang, Jungmin Jo, Soo-Ghee Oh, Kyoung-Jae Chung, Y S Hwang
No abstract text is available yet for this article.
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27910668/compact-and-lightweight-support-platform-with-electromagnetic-disturbance-elimination-for-interferometer-on-reversed-field-pinch-keda-torus-experiment
#15
Wenzhe Mao, Peng Yuan, Jian Zheng, Weixing Ding, Hong Li, Tao Lan, Adi Liu, Wandong Liu, Jinlin Xie
A compact and lightweight support platform has been used as a holder for the interferometer system on the Keda Torus eXperiment (KTX), which is a reversed field pinch device. The vibration caused by the interaction between the time-varying magnetic field and the induced current driven in the metal optical components has been measured and, following comparison with the mechanical vibration of the KTX device and the refraction effect of the ambient turbulent air flow, has been identified as the primary vibration source in this case...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27910664/two-photon-lif-on-the-hit-si3-experiment-absolute-density-and-temperature-measurements-of-deuterium-neutrals
#16
Drew Elliott, Derek Sutherland, Umair Siddiqui, Earl Scime, Chris Everson, Kyle Morgan, Aaron Hossack, Brian Nelson, Tom Jarboe
Two-photon laser-induced fluorescence measurements were performed on the helicity injected torus (HIT-SI3) device to determine the density and temperature of the background neutral deuterium population. Measurements were taken in 2 ms long pulsed plasmas after the inductive helicity injectors were turned off. Attempts to measure neutrals during the main phase of the plasma were unsuccessful, likely due to the density of neutrals being below the detection threshold of the diagnostic. An unexpectedly low density of atomic deuterium was measured in the afterglow; roughly 100 times lower than the theoretical prediction of 10(17) m(-3)...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27910625/gamma-ray-spectroscopy-at-mhz-counting-rates-with-a-compact-labr3-detector-and-silicon-photomultipliers-for-fusion-plasma-applications
#17
M Nocente, D Rigamonti, V Perseo, M Tardocchi, G Boltruczyk, A Broslawski, A Cremona, G Croci, M Gosk, V Kiptily, S Korolczuk, M Mazzocco, A Muraro, E Strano, I Zychor, G Gorini
Gamma-ray spectroscopy measurements at MHz counting rates have been carried out, for the first time, with a compact spectrometer based on a LaBr3 scintillator and silicon photomultipliers. The instrument, which is also insensitive to magnetic fields, has been developed in view of the upgrade of the gamma-ray camera diagnostic for α particle measurements in deuterium-tritium plasmas of the Joint European Torus. Spectra were measured up to 2.9 MHz with a projected energy resolution of 3%-4% in the 3-5 MeV range, of interest for fast ion physics studies in fusion plasmas...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27910623/an-upgraded-interferometer-polarimeter-system-for-broadband-fluctuation-measurements
#18
E Parke, W X Ding, J Duff, D L Brower
Measuring high-frequency fluctuations (above tearing mode frequencies) is important for diagnosing instabilities and transport phenomena. The Madison Symmetric Torus interferometer-polarimeter system has been upgraded to utilize improved planar-diode mixer technology. The new mixers reduce phase noise and allow more sensitive measurements of fluctuations at high frequency. Typical polarimeter rms phase noise values of 0.05°-0.07° are obtained with 400 kHz bandwidth. The low phase noise enables the resolution of fluctuations up to 250 kHz for polarimetry and 600 kHz for interferometry...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27910604/response-function-of-single-crystal-synthetic-diamond-detectors-to-1-4-mev-neutrons-for-spectroscopy-of-d-plasmas
#19
M Rebai, L Giacomelli, A Milocco, M Nocente, D Rigamonti, M Tardocchi, F Camera, C Cazzaniga, Z J Chen, T F Du, T S Fan, A Giaz, Z M Hu, T Marchi, X Y Peng, G Gorini
A Single-crystal Diamond (SD) detector prototype was installed at Joint European Torus (JET) in 2013 and the achieved results have shown its spectroscopic capability of measuring 2.5 MeV neutrons from deuterium plasmas. This paper presents measurements of the SD response function to monoenergetic neutrons, which is a key point for the development of a neutron spectrometer based on SDs and compares them with Monte Carlo simulations. The analysis procedure allows for a good reconstruction of the experimental results...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27910585/the-eddy-current-probe-array-for-keda-torus-experiment
#20
Zichao Li, Hong Li, Cui Tu, Jintong Hu, Wei You, Bing Luo, Mingsheng Tan, Yolbarsop Adil, Yanqi Wu, Biao Shen, Bingjia Xiao, Ping Zhang, Wenzhe Mao, Hai Wang, Xiaohui Wen, Haiyang Zhou, Jinlin Xie, Tao Lan, Adi Liu, Weixing Ding, Chijin Xiao, Wandong Liu
In a reversed field pinch device, the conductive shell is placed as close as possible to the plasma so as to balance the plasma during discharge. Plasma instabilities such as the resistive wall mode and certain tearing modes, which restrain the plasma high parameter operation, respond closely with conditions in the wall, in essence the eddy current present. Also, the effect of eddy currents induced by the external coils cannot be ignored when active control is applied to control instabilities. One diagnostic tool, an eddy current probe array, detects the eddy current in the composite shell...
November 2016: Review of Scientific Instruments
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