keyword
MENU ▼
Read by QxMD icon Read
search

Gate control

keyword
https://www.readbyqxmd.com/read/27910629/fast-island-phase-identification-for-tearing-mode-feedback-control-on-j-text-tokamak
#1
B Rao, D Li, F R Hu, Y H Ding, Q M Hu, H Jin
A new method to control the tearing mode (TM) in tokamaks has been proposed [Q. Hu and Q. Yu, Nucl. Fusion 56, 034001 (5pp.) (2016)], according to which, the external resonant magnetic perturbation needs to be applied in certain magnetic island phase regions. Therefore, it is very important to identify the helical phase of magnetic islands in real time. The TM in tokamak plasmas is normally rotating and carries magnetic oscillations, which are known as Mirnov oscillations and can be detected by Mirnov probes...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27910620/a-novel-technique-for-real-time-estimation-of-edge-pedestal-density-gradients-via-reflectometer-time-delay-data
#2
L Zeng, E J Doyle, T L Rhodes, G Wang, C Sung, W A Peebles, M Bobrek
A new model-based technique for fast estimation of the pedestal electron density gradient has been developed. The technique uses ordinary mode polarization profile reflectometer time delay data and does not require direct profile inversion. Because of its simple data processing, the technique can be readily implemented via a Field-Programmable Gate Array, so as to provide a real-time density gradient estimate, suitable for use in plasma control systems such as envisioned for ITER, and possibly for DIII-D and Experimental Advanced Superconducting Tokamak...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27910494/far-infrared-tangential-interferometer-polarimeter-design-and-installation-for-nstx-u
#3
E R Scott, R Barchfeld, P Riemenschneider, C W Domier, C M Muscatello, M Sohrabi, R Kaita, Y Ren, N C Luhmann
The Far-infrared Tangential Interferometer/Polarimeter (FIReTIP) system has been refurbished and is being reinstalled on the National Spherical Torus Experiment-Upgrade (NSTX-U) to supply real-time line-integrated core electron density measurements for use in the NSTX-U plasma control system (PCS) to facilitate real-time density feedback control of the NSTX-U plasma. Inclusion of a visible light heterodyne interferometer in the FIReTIP system allows for real-time vibration compensation due to movement of an internally mounted retroreflector and the FIReTIP front-end optics...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27910382/fast-imaging-diagnostics-on-the-c-2u-advanced-beam-driven-field-reversed-configuration-device
#4
E M Granstedt, P Petrov, K Knapp, M Cordero, V Patel
The C-2U device employed neutral beam injection, end-biasing, and various particle fueling techniques to sustain a Field-Reversed Configuration (FRC) plasma. As part of the diagnostic suite, two fast imaging instruments with radial and nearly axial plasma views were developed using a common camera platform. To achieve the necessary viewing geometry, imaging lenses were mounted behind re-entrant viewports attached to welded bellows. During gettering, the vacuum optics were retracted and isolated behind a gate valve permitting their removal if cleaning was necessary...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27909841/the-shaping-of-intrinsic-membrane-potential-oscillations-positive-negative-feedback-ionic-resonance-amplification-nonlinearities-and-time-scales
#5
Horacio G Rotstein
The generation of intrinsic subthreshold (membrane potential) oscillations (STOs) in neuronal models requires the interaction between two processes: a relatively fast positive feedback that favors changes in voltage and a slower negative feedback that opposes these changes. These are provided by the so-called resonant and amplifying gating variables associated to the participating ionic currents. We investigate both the biophysical and dynamic mechanisms of generation of STOs and how their attributes (frequency and amplitude) depend on the model parameters for biophysical (conductance-based) models having qualitatively different types of resonant currents (activating and inactivating) and an amplifying current...
December 1, 2016: Journal of Computational Neuroscience
https://www.readbyqxmd.com/read/27905510/remarkable-alterations-of-nav1-6-in-reactive-astrogliosis-during-epileptogenesis
#6
Hongyan Zhu, Yuxiao Zhao, Hao Wu, Nan Jiang, Ziyi Wang, Weide Lin, Jiahui Jin, Yonghua Ji
Voltage-gated sodium channels (VGSCs) play a vital role in controlling neuronal excitability. Nav1.6 is the most abundantly expressed VGSCs subtype in the adult central nervous system and has been found to contribute to facilitate the hyperexcitability of neurons after electrical induction of status epilepticus (SE). To clarify the exact expression patterns of Nav1.6 during epileptogenesis, we examined the expression of Nav1.6 at protein and mRNA levels in two distinct animal models of temporal lobe epilepsy (TLE) including a post-SE model induced by kainic acid (KA) intrahippocampal injection and a kindling model evoked by pentylenetetrazole (PTZ)...
December 1, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27905095/electrical-properties-of-ultrathin-hf-ti-o-higher-k-gate-dielectric-films-and-their-application-in-etsoi-mosfet
#7
Yuhua Xiong, Xiaoqiang Chen, Feng Wei, Jun Du, Hongbin Zhao, Zhaoyun Tang, Bo Tang, Wenwu Wang, Jiang Yan
Ultrathin Hf-Ti-O higher k gate dielectric films (~2.55 nm) have been prepared by atomic layer deposition. Their electrical properties and application in ETSOI (fully depleted extremely thin SOI) PMOSFETs were studied. It is found that at the Ti concentration of Ti/(Ti + Hf) ~9.4%, low equivalent gate oxide thickness (EOT) of ~0.69 nm and acceptable gate leakage current density of 0.61 A/cm(2) @ (V fb - 1)V could be obtained. The conduction mechanism through the gate dielectric is dominated by the F-N tunneling in the gate voltage range of -0...
December 2016: Nanoscale Research Letters
https://www.readbyqxmd.com/read/27905012/microbial-proteins-as-novel-industrial-biotechnology-hosts-to-treat-epilepsy
#8
REVIEW
Zareen Amtul, Amal A Aziz
Epilepsy is characterized by the hyperexcitability of various neuronal circuits that results due to the imbalance between glutamate-mediated excitation of voltage-gated cation channels and γ-amino butyric acid (GABA)-mediated inhibition of anion channels leading to aberrant, sporadic oscillations or fluctuations in neuronal electrical activity. Epilepsy with a risk of mortality and around 65 million sufferers of all ages all over the world is limited therapeutically with high rates of adverse reactions, lack of complete seizure control, and over 30% patients with refractory epilepsy...
December 1, 2016: Molecular Neurobiology
https://www.readbyqxmd.com/read/27901116/generation-of-four-photon-polarization-entangled-decoherence-free-states-with-cross-kerr-nonlinearity
#9
Meiyu Wang, Fengli Yan, Ting Gao
We propose a theoretical protocol for preparing four-photon polarization entangled decoherence-free states, which are immune to the collective noise. With the assistance of the cross-Kerr nonlinearities, a two-photon spatial entanglement gate, two controlled-NOT gates, a four-photon polarization entanglement gate are inserted into the circuit, where X homodyne measurements are aptly applied. Combined with some swap gates and simple linear optical elements, four-photon polarization entangled decoherence-free states which can be utilized to represent two logical qubits, |0〉L and |1〉L are achieved at the output ports of the circuit...
November 30, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27900342/cacna1c-protecting-young-hippocampal-neurons-in-the-adult-brain
#10
Héctor De Jesús-Cortés, Anjali M Rajadhyaksha, Andrew A Pieper
Neuropsychiatric disease is the leading cause of disability in the United States, and fourth worldwide.(1,2) Not surprisingly, human genetic studies have revealed a common genetic predisposition for many forms of neuropsychiatric disease, potentially explaining why overlapping symptoms are commonly observed across multiple diagnostic categories. For example, the CACNA1C gene was recently identified in the largest human genome-wide association study to date as a risk loci held in common across 5 major forms of neuropsychiatric disease: bipolar disorder, schizophrenia, major depressive disorder (MDD), autism spectrum disorder and attention deficit-hyperactivity disorder...
2016: Neurogenesis (Austin, Tex.)
https://www.readbyqxmd.com/read/27899943/effects-of-allitridum-on-the-transient-outward-potassium-current-in-rats-with-heart-failure
#11
Xiao-Jing Zhao, Kun Lin, Yu Zhang, Bin Xu, Li Liu, Yi-Cheng Fu, Xi Chen, Zhong-Qi Cai, Zhi-Juan Wu, Yun Huang, Yang Li
OBJECTIVE: To study the effect of allitridum on the transient outward potassium current (Ito) of ventricular myocytes in heart failure (HF). METHODS: The dual enzymatic method was used to separate single ventricular myocytes from Sprague Dawley rats. Patch-clamping was used to record Ito and analyze the effect of allitridum on the current. RESULTS: The Ito current had a significant decrease in the HF group, compared with the control group...
September 2016: Journal of Geriatric Cardiology: JGC
https://www.readbyqxmd.com/read/27897674/dopamine-alters-the-fidelity-of-working-memory-representations-according-to-attentional-demands
#12
Sean James Fallon, Nahid Zokaei, Agnes Norbury, Sanjay G Manohar, Masud Husain
Capacity limitations in working memory (WM) necessitate the need to effectively control its contents. Here, we examined the effect of cabergoline, a dopamine D2 receptor agonist, on WM using a continuous report paradigm that allowed us to assess the fidelity with which items are stored. We assessed recall performance under three different gating conditions: remembering only one item, being cued to remember one target among distractors, and having to remember all items. Cabergoline had differential effects on recall performance according to whether distractors had to be ignored and whether mnemonic resources could be deployed exclusively to the target...
November 29, 2016: Journal of Cognitive Neuroscience
https://www.readbyqxmd.com/read/27897671/high-intensity-interval-exercise-promotes-motor-cortex-disinhibition-and-early-motor-skill-consolidation
#13
Ellen L Stavrinos, James P Coxon
Gamma-aminobutyric acid (GABA) inhibition shapes motor cortex output, gates synaptic plasticity in the form of long-term potentiation, and plays an important role in motor learning. Remarkably, recent studies have shown that acute cardiovascular exercise can improve motor memory, but the cortical mechanisms are not completely understood. We investigated whether an acute bout of lower-limb high-intensity interval (HIT) exercise could promote motor memory formation in humans through changes in cortical inhibition within the hand region of the primary motor cortex...
November 29, 2016: Journal of Cognitive Neuroscience
https://www.readbyqxmd.com/read/27897275/an-ex-vivo-model-contributing-to-the-diagnosis-and-evaluation-of-new-drugs-in-cystic-fibrosis
#14
A M Di Lullo, M Scorza, F Amato, M Comegna, V Raia, L Maiuri, G Ilardi, E Cantone, G Castaldo, M Iengo
Cystic fibrosis (CF) is an autosomal recessive disease caused by mutations in the cystic fibrosis transmembrane regulator (CFTR) gene. About 2000 mutations have been described so far. We setup an ex vivo model of human nasal epithelial cells (HNECs) to study CF patients testing the effect of novel mutations and molecular therapies. We performed the sampling (by brushing), followed by culture and analysis of HNECs using a series of molecular techniques. We performed 50 brushings from CF patients and controls...
November 29, 2016: Acta Otorhinolaryngologica Italica
https://www.readbyqxmd.com/read/27896815/how-and-why-are-calcium-currents-curtailed-in-the-skeletal-muscle-voltage-gated-calcium-channels
#15
Bernhard E Flucher, Petronel Tuluc
Voltage-gated calcium channels represent the sole mechanism converting electrical signals of excitable cells into cellular functions such as contraction, secretion, and gene regulation. Specific voltage-sensing domains detect changes in membrane potentials and control channel gating. Calcium ions entering through the channel function as second messengers regulating cell functions; with the exception of skeletal muscle, where CaV 1.1 is essentially not functioning as channel but activates calcium release from intracellular stores...
November 29, 2016: Journal of Physiology
https://www.readbyqxmd.com/read/27896190/the-use-of-locally-applied-vibration-to-minimize-pain-during-fractional-co2-laser-therapy-in-living-liver-donor-scar-management
#16
Sinyoung Song, Dong Hoon Choi, Tae Suk Oh
BACKGROUND: Fractional CO2 laser is an effective treatment for scars, but most patients complain about sharp burning pain, even after the application of lidocaine ointment. This study analyzed the impact of a vibrating device to nonpharmacologically reduce the acute pain of laser treatment, in accordance with the gate control theory of pain management. METHODS: This is a prospective study performed from May 2013 through March 2014. Fifty-three patients (mean age, 26...
November 2016: Archives of Plastic Surgery
https://www.readbyqxmd.com/read/27893283/driver-speed-selection-on-high-speed-two-lane-highways-comparing-speed-profiles-between-uniform-and-differential-speed-limits
#17
Brendan J Russo, Peter T Savolainen, Timothy J Gates, Jonathan J Kay, Sterling Frazier
OBJECTIVE: Although a considerable amount of prior research has investigated the impacts of speed limits on traffic safety and operations, much of this research, and nearly all of the research related to differential speed limits, has been specific to limited access freeways. The unique safety and operational issues on highways without access control creates difficulty relating the conclusions from prior freeway-related speed limit research to two-lane highways, particularly research on differential limits due to passing limitations and subsequent queuing...
November 28, 2016: Traffic Injury Prevention
https://www.readbyqxmd.com/read/27892583/resonant-tunneling-based-graphene-quantum-dot-memristors
#18
Xuan Pan, Efstratios Skafidas
In this paper, we model two-terminal all graphene quantum dot (GQD) based resistor-type memory devices (memristors). The resistive switching is achieved by resonant electron tunneling. We show that parallel GQDs can be used to create multi-state memory circuits. The number of states can be optimised with additional voltage sources, whilst the noise margin for each state can be controlled by appropriately choosing the branch resistance. A three-terminal GQD device configuration is also studied. The addition of an isolated gate terminal can be used to add further or modify the states of the memory device...
November 28, 2016: Nanoscale
https://www.readbyqxmd.com/read/27891403/efficacy-of-transcutaneous-electrical-nerve-stimulation-in-the-treatment-of-overactive-bladder
#19
Nidhi Sharma, Kaja Rekha, Krishnamurthy Jayashree Srinivasan
INTRODUCTION: Overactive Bladder (OAB) accounts for 40-70% cases of incontinence. The etiology is unknown though detrusor instability is found in urodynamic evaluation of almost all cases. Detrusor instability or hyperreflexia can be inhibited by direct inhibition of impulses in the pre-ganglionic afferent neuron or by inhibition of bladder pre-ganglionic neurons of the efferent limb of micturition reflex. Transcutaneous Electrical Nerve Stimulation (TENS) is based on the gate control theory of abolishing the local micturition reflex arc...
October 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/27891077/presynaptic-g-protein-coupled-receptors-gatekeepers-of-addiction
#20
REVIEW
Kari A Johnson, David M Lovinger
Drug abuse and addiction cause widespread social and public health problems, and the neurobiology underlying drug actions and drug use and abuse is an area of intensive research. Drugs of abuse alter synaptic transmission, and these actions contribute to acute intoxication as well as the chronic effects of abused substances. Transmission at most mammalian synapses involves neurotransmitter activation of two receptor subtypes, ligand-gated ion channels that mediate fast synaptic responses and G protein-coupled receptors (GPCRs) that have slower neuromodulatory actions...
2016: Frontiers in Cellular Neuroscience
keyword
keyword
20576
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"