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https://www.readbyqxmd.com/read/29347052/capacitively-coupled-rf-discharge-with-a-large-amount-of-microparticles-spatiotemporal-emission-pattern-and-microparticle-arrangement
#1
M Y Pustylnik, I L Semenov, E Zähringer, H M Thomas
The effect of micron-sized particles on a low-pressure capacitively coupled rf discharge is studied both experimentally and using numerical simulations. In the laboratory experiments, microparticle clouds occupying a considerable fraction of the discharge volume are supported against gravity with the help of the thermophoretic force. The spatiotemporally resolved optical emission measurements are performed with different arrangements of microparticles. The numerical simulations are carried out on the basis of a one-dimensional hybrid (fluid-kinetic) discharge model describing the interaction between plasma and microparticles in a self-consistent way...
September 2017: Physical Review. E
https://www.readbyqxmd.com/read/29344902/occupational-exposure-to-electromagnetic-fields-in-magnetic-resonance-environment-basic-aspects-and-review-of-exposure-assessment-approaches
#2
Valentina Hartwig, Stefania Romeo, Olga Zeni
The purpose of this review is to make a contribution to build a comprehensive knowledge of the main aspects related to the occupational exposure to electromagnetic fields (EMFs) in magnetic resonance imaging (MRI) environments. Information has been obtained from original research papers published in international peer-reviewed journals in the English language and from documents published by governmental bodies and authorities. An overview of the occupational exposure scenarios to static magnetic fields, motion-induced, time-varying magnetic fields, and gradient and radiofrequency fields is provided, together with a summary of the relevant regulation for limiting exposure...
January 18, 2018: Medical & Biological Engineering & Computing
https://www.readbyqxmd.com/read/29340953/mdpin1b-encodes-a-putative-auxin-efflux-carrier-and-has-different-expression-patterns-in-bc-and-m9-apple-rootstocks
#3
Zengyu Gan, Yi Wang, Ting Wu, Xuefeng Xu, Xinzhong Zhang, Zhenhai Han
Lower promoter activity is closely associated with lower MdPIN1b expression in the M9 interstem, which might contribute to the dwarfing effect in apple trees. Apple trees grafted onto dwarfing rootstock Malling 9 (M9) produce dwarfing tree architecture with high yield and widely applying in production. Previously, we have reported that in Malus 'Red Fuji' (RF) trees growing on M9 interstem and Baleng Crab (BC) rootstock, IAA content was relatively higher in bark tissue of M9 interstem than that in scion or rootstock...
January 17, 2018: Plant Molecular Biology
https://www.readbyqxmd.com/read/29338885/concurrence-of-rheumatoid-arthritis-and-calcium-pyrophosphate-deposition-disease-a-case-collection-and-review-of-the-literature
#4
Viktoriya Sabchyshyn, Irina Konon, Lawrence M Ryan, Ann K Rosenthal
OBJECTIVE: Calcium pyrophosphate deposition disease (CPDD) is arthritis caused by calcium pyrophosphate (CPP) crystal deposition in joints. It is commonly associated with aging as well as a handful of metabolic syndromes. Recent epidemiologic studies suggest a positive association of CPDD and rheumatoid arthritis (RA). Yet how these diseases are related remains unclear. We set out to describe 21 well-characterized patients with both diagnoses. METHODS: Medical records of patients with both RA and CPDD identified at a single academic practice site were reviewed for age, gender, age of CPDD and RA onset, disease duration, joint involvement, and lab values including rheumatoid factor (RF), cyclic citrullinated peptide antibody (CCP), iron studies, and parathyroid hormone and calcium levels...
December 2, 2017: Seminars in Arthritis and Rheumatism
https://www.readbyqxmd.com/read/29315267/experimental-evaluation-of-uwb-indoor-positioning-for-sport-postures
#5
Matteo Ridolfi, Stef Vandermeeren, Jense Defraye, Heidi Steendam, Joeri Gerlo, Dirk De Clercq, Jeroen Hoebeke, Eli De Poorter
Radio frequency (RF)-based indoor positioning systems (IPSs) use wireless technologies (including Wi-Fi, Zigbee, Bluetooth, and ultra-wide band (UWB)) to estimate the location of persons in areas where no Global Positioning System (GPS) reception is available, for example in indoor stadiums or sports halls. Of the above-mentioned forms of radio frequency (RF) technology, UWB is considered one of the most accurate approaches because it can provide positioning estimates with centimeter-level accuracy. However, it is not yet known whether UWB can also offer such accurate position estimates during strenuous dynamic activities in which moves are characterized by fast changes in direction and velocity...
January 9, 2018: Sensors
https://www.readbyqxmd.com/read/29304218/selective-vulnerability-of-brainstem-nuclei-in-distinct-tauopathies-a-postmortem-study
#6
Rana A Eser, Alexander J Ehrenberg, Cathrine Petersen, Sara Dunlop, Maria B Mejia, Claudia K Suemoto, Christine M Walsh, Hima Rajana, Jun Oh, Panos Theofilas, William W Seeley, Bruce L Miller, Thomas C Neylan, Helmut Heinsen, Lea T Grinberg
The brainstem nuclei of the reticular formation (RF) are critical for regulating homeostasis, behavior, and cognition. RF degenerates in tauopathies including Alzheimer disease (AD), progressive supranuclear palsy (PSP), and corticobasal degeneration (CBD). Although the burden of phopho-tau inclusion is high across these diseases, suggesting a similar vulnerability pattern, a distinct RF-associated clinical phenotype in these diseases indicates the opposite. To compare patterns of RF selective vulnerability to tauopathies, we analyzed 5 RF nuclei in tissue from 14 AD, 14 CBD, 10 PSP, and 3 control cases...
January 2, 2018: Journal of Neuropathology and Experimental Neurology
https://www.readbyqxmd.com/read/29301297/a-monolithic-multisensor-microchip-with-complete-on-chip-rf-front-end
#7
Massimo Merenda, Corrado Felini, Francesco G Della Corte
In this paper, a new wireless sensor, designed for a 0.35 µm CMOS technology, is presented. The microchip was designed to be placed on an object for the continuous remote monitoring of its temperature and illumination state. The temperature sensor is based on the temperature dependence of the I-V characteristics of bipolar transistors available in CMOS technology, while the illumination sensor is an integrated p-n junction photodiode. An on-chip 2.5 GHz transmitter, coupled to a mm-sized dipole radiating element fabricated on the same microchip and made in the top metal layer of the same die, sends the collected data wirelessly to a radio receiver using an On-Off Keying (OOK) modulation pattern...
January 2, 2018: Sensors
https://www.readbyqxmd.com/read/29288426/high-glucose-levels-impact-visual-response-properties-of-retinal-ganglion-cells-in-c57-mice-an-in-vitro-physiological-study
#8
Yuan Zhou, Chunxia Xiao, Mingliang Pu
This study investigated visual response properties of retinal ganglion cells (RGCs) under high glucose levels. Extracellular single-unit responses of RGCs from mouse retinas were recorded. And the eyecup was prepared as a flat mount in a recording chamber and superfused with Ames medium. The averaged RF size of the ON RGCs (34.1±2.9, n=14) was significantly smaller than the OFF RGCs under the HG (49.3±0.3, n=12) (P<0.0001) conditions. The same reduction pattern was also observed in the osmotic control group (HM) between ON and OFF RGCs (P<0...
November 16, 2017: Science China. Life Sciences
https://www.readbyqxmd.com/read/29246875/proteomics-analysis-reveals-differential-pattern-of-widespread-protein-expression-and-novel-role-of-histidine-rich-glycoprotein-and-lipopolysaccharide-binding-protein-in-rheumatoid-arthritis
#9
Doojin Kim, Sora Mun, Jiyeong Lee, Arum Park, AeEun Seok, Yeon-Tae Chun, Hee-Gyoo Kang
Rheumatoid factor (RF) is an auto-antibody against antigen-antibody immune complexes. RF is valuable as a biomarker for the screening of autoimmune and infectious diseases. However, it is suggested that RF would be a more powerful biomarker when used complementarily with RF-correlated proteins. In this study, we utilized a proteomic approach to analyze global protein expression in RF-low and RF-high subjects using high-performance liquid chromatography tandem mass spectrometry. Histidine-rich glycoprotein (HRG) and lipopolysaccharide-binding protein (LBP) were found to be differentially expressed between RF-low and RF-high subjects (cut-off >2-fold, p<0...
December 12, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29236525/convergence-in-reports-of-adolescents-psychopathology-a-focus-on-disorganized-attachment-and-reflective-functioning
#10
Jessica L Borelli, Alexandra Palmer, Salome Vanwoerden, Carla Sharp
Although convergence in parent-youth reports of adolescent psychopathology is critical for treatment planning, research documents a pervasive lack of agreement in ratings of adolescents' symptoms. Attachment insecurity (particularly disorganized attachment) and impoverished reflective functioning (RF) are 2 theoretically implicated predictors of low convergence that have not been examined in the literature. In a cross-sectional investigation of adolescents receiving inpatient psychiatric treatment, we examined whether disorganized attachment and low (adolescent and parent) RF were associated with patterns of convergence in adolescent internalizing and externalizing symptoms...
December 13, 2017: Journal of Clinical Child and Adolescent Psychology
https://www.readbyqxmd.com/read/29196320/inhibition-in-simple-cell-receptive-fields-is-broad-and-off-subregion-biased
#11
M Morgan Taylor, Madineh Sedigh-Sarvestani, Leif Vigeland, Larry A Palmer, Diego Contreras
Inhibition in thalamorecipient layer 4 simple cells of primary visual cortex is believed to play important roles in establishing visual response properties and integrating visual inputs across their receptive fields (RFs). Simple cell RFs are characterized by non-overlapping, spatially restricted subregions in which visual stimuli can either increase or decrease the cell's firing rate, depending on contrast. Inhibition is believed to be triggered exclusively from visual stimulation of individual RF subregions...
December 1, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/29155078/radial-asymmetries-in-population-receptive-field-size-and-cortical-magnification-factor-in-early-visual-cortex
#12
Maria Fatima Silva, Jan W Brascamp, Sónia Ferreira, Miguel Castelo-Branco, Serge O Dumoulin, Ben M Harvey
Human visual cortex does not represent the whole visual field with the same detail. Changes in receptive field size, population receptive field (pRF) size and cortical magnification factor (CMF) with eccentricity are well established, and associated with changes in visual acuity with eccentricity. Visual acuity also changes across polar angle. However, it remains unclear how RF size, pRF size and CMF change across polar angle. Here, we examine differences in pRF size and CMF across polar angle in V1, V2 and V3 using pRF modeling of human fMRI data...
November 14, 2017: NeuroImage
https://www.readbyqxmd.com/read/29149053/laser-induced-breakdown-spectroscopy-for-rapid-discrimination-of-heavy-metal-contaminated-seafood-tegillarca-granosa
#13
Guoli Ji, Pengchao Ye, Yijian Shi, Leiming Yuan, Xiaojing Chen, Mingshun Yuan, Dehua Zhu, Xi Chen, Xinyu Hu, Jing Jiang
Tegillarca granosa samples contaminated artificially by three kinds of toxic heavy metals including zinc (Zn), cadmium (Cd), and lead (Pb) were attempted to be distinguished using laser-induced breakdown spectroscopy (LIBS) technology and pattern recognition methods in this study. The measured spectra were firstly processed by a wavelet transform algorithm (WTA), then the generated characteristic information was subsequently expressed by an information gain algorithm (IGA). As a result, 30 variables obtained were used as input variables for three classifiers: partial least square discriminant analysis (PLS-DA), support vector machine (SVM), and random forest (RF), among which the RF model exhibited the best performance, with 93...
November 17, 2017: Sensors
https://www.readbyqxmd.com/read/29135468/thermal-effect-of-zn-quantum-dots-grown-on-si-111-competition-between-relaxation-and-reconstraint
#14
Li-Chi Kao, Bo-Jia Huang, Yu-En Jeng, Kai-Teng Tu, Shang-Jui Chiu, Ching-Shun Ku, Kuang-Yao Lo
Zn dots are potential solutions for metal contacts in future nanodevices. The metastable states that exist at the interface between Zn quantum dots and oxide-free Si(111) surfaces can suppress the development of the complete relaxation and increase the size of Zn dots. In this work, the actual heat consumption of the structural evolution of Zn dots resulting from extrinsic thermal effect was analyzed. Zn dots were coherently grown on oxide-free Si(111) through magnetron RF sputtering. A compensative optical method combined with reflective second harmonic generation (RSHG) and synchrotron X-ray diffraction (XRD) was developed to statistically analyze the thermal effect on the Zn dot system...
November 14, 2017: Nanotechnology
https://www.readbyqxmd.com/read/29110240/manipulating-transmit-and-receive-sensitivities-of-radiofrequency-surface-coils-using-shielded-and-unshielded-high-permittivity-materials
#15
Manushka V Vaidya, Cem M Deniz, Christopher M Collins, Daniel K Sodickson, Riccardo Lattanzi
OBJECTIVE: To use high-permittivity materials (HPM) positioned near radiofrequency (RF) surface coils to manipulate transmit/receive field patterns. MATERIALS AND METHODS: A large HPM pad was placed below the RF coil to extend the field of view (FOV). The resulting signal-to-noise ratio (SNR) was compared with that of other coil configurations covering the same FOV in simulations and experiments at 7 T. Transmit/receive efficiency was evaluated when HPM discs with or without a partial shield were positioned at a distance from the coil...
November 6, 2017: Magma
https://www.readbyqxmd.com/read/29094412/distracter-suppression-dominates-attentional-modulation-of-responses-to-multiple-stimuli-inside-middle-temporal-mt-neuron-s-receptive-field
#16
Nour Malek, Stefan Treue, Paul Khayat, Julio Martinez-Trujillo
Single cell studies in macaques have shown that attending to one of two stimuli, positioned inside a visual neuron's receptive field (RF), modulates the neuron's response to reflect the features of the attended stimulus. Such a modulation has been described as a "push-pull" effect relative to a reference response: neuronal response increases when attention is directed to a preferred stimulus, and decreases when attention is directed to a non-preferred stimulus. It has been further suggested that the response increase when attending to a preferred stimulus is the predominant effect...
November 2, 2017: European Journal of Neuroscience
https://www.readbyqxmd.com/read/29059107/sensor-enabled-activity-class-recognition-in-preschoolers-hip-versus-wrist-data
#17
Stewart Trost, Dylan Cliff, Matthew Ahmadi, Nguyen Van Tuc, Markus Hagenbuchner
PURPOSE: Pattern recognition approaches to accelerometer data processing have emerged as viable alternatives to cut-point methods. However, few studies have explored the validity of pattern recognition approaches in pre-schoolers; and none have compared supervised learning algorithms trained on hip and wrist data. To develop, test, and compare activity class recognition algorithms trained on hip, wrist, and combined hip and wrist accelerometer data in pre-schoolers. METHODS: 11 children aged 3 - 6 y (mean age 4...
October 20, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/29046427/different-contributions-of-primary-motor-cortex-reticular-formation-and-spinal-cord-to-fractionated-muscle-activation
#18
Boubker Zaaimi, Lauren R Dean, Stuart N Baker
Coordinated movement requires patterned activation of muscles. In this study we examined differences in selective activation of primate upper limb muscles by cortical and sub-cortical regions. Five macaque monkeys were trained to perform a reach and grasp task, and electromyogram (EMG) was recorded from 10-24 muscles while weak single-pulse stimuli were delivered through microelectrodes inserted in the motor cortex (M1), reticular formation (RF) or cervical spinal cord (SC). Stimulus intensity was adjusted to a level just above threshold...
October 18, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/29044804/comparison-of-visual-receptive-fields-in-the-dorsolateral-prefrontal-cortex-dlpfc-and-ventral-intraparietal-area-vip-in-macaques
#19
Pooja Viswanathan, Andreas Nieder
The concept of receptive field (RF) describes the responsiveness of neurons to sensory space. Neurons in the primate association cortices have long been known to be spatially selective but a detailed characterization and direct comparison of RFs between frontal and parietal association cortices is missing. We sampled the RFs of a large number of neurons from two interconnected areas of the frontal and parietal lobes, the dorsolateral prefrontal cortex (dlPFC) and ventral intraparietal area (VIP), of rhesus monkeys by systematically presenting a moving bar during passive fixation...
October 17, 2017: European Journal of Neuroscience
https://www.readbyqxmd.com/read/29037901/hla-drb1-alleles-and-juvenile-idiopathic-arthritis-diagnostic-clues-emerging-from-a-meta-analysis
#20
REVIEW
Annalisa De Silvestri, Cristina Capittini, Dimitri Poddighe, Gian Luigi Marseglia, Luca Mascaretti, Elena Bevilacqua, Valeria Scotti, Chiara Rebuffi, Annamaria Pasi, Miryam Martinetti, Carmine Tinelli
Juvenile Idiopathic Arthritis (JIA) is characterized with a variable pattern of articular involvement and systemic symptoms and, thus, it has been classified in several subtypes. Genetic predisposition to JIA is mainly due to HLA class II molecules (HLA-DRB1, HLA-DPB1), although HLA class I molecules and non-HLA genes have been implicated, too. Here, we carried out a meta-analysis including selected studies designed to assess HLA genetic background of JIA patients, compared to healthy controls; particularly, we focused our attention on HLA-DRB1...
October 14, 2017: Autoimmunity Reviews
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