D. Mastrovito
A5063059832- Magnetic confinement fusion research
- Functional Brain Connectivity Studies
- Fusion materials and technologies
- Superconducting Materials and Applications
- Neural dynamics and brain function
- Advanced Data Storage Technologies
- Ionosphere and magnetosphere dynamics
- Distributed and Parallel Computing Systems
- Advanced Neuroimaging Techniques and Applications
- X-ray Spectroscopy and Fluorescence Analysis
- Neural Networks and Reservoir Computing
- Mental Health Research Topics
- Cell Image Analysis Techniques
- Nuclear Physics and Applications
- Nuclear reactor physics and engineering
- Methane Hydrates and Related Phenomena
- Plasma Diagnostics and Applications
- Particle accelerators and beam dynamics
- Atomic and Molecular Physics
- Single-cell and spatial transcriptomics
- Advanced Memory and Neural Computing
- Laser-Plasma Interactions and Diagnostics
- Suicide and Self-Harm Studies
- EEG and Brain-Computer Interfaces
- Complex Network Analysis Techniques
Allen Institute
2021-2024
Allen Institute for Brain Science
2022-2023
Stanford University
2019-2021
North Seattle College
2021
Rutgers, The State University of New Jersey
2013-2018
Rutgers Sexual and Reproductive Health and Rights
2016
Carnegie Mellon University
2016
Princeton Plasma Physics Laboratory
2002-2012
Princeton University
2003-2007
Higashihiroshima Medical Center
2006
Autism and schizophrenia share overlapping genetic etiology, common changes in brain structure cognitive deficits. A number of studies using resting state fMRI have shown that machine learning algorithms can distinguish between healthy controls individuals diagnosed with either autism spectrum disorder or schizophrenia. However, it has not yet been determined whether be used to the two disorders. Using a linear support vector machine, we identify features are most diagnostic for each...
The major objective of the National Spherical Torus Experiment (NSTX) is to understand basic toroidal confinement physics at low aspect ratio and high βT in order advance spherical torus (ST) concept. In do this, NSTX utilizes up 7.5 MW neutral beam injection, 6 harmonic fast waves (HHFWs), it operates with plasma currents 1.5 MA elongations 2.6 a field 0.45 T. New facility, diagnostic modelling capabilities developed over past two years have enabled research team make significant progress...
Plasma shape control using real-time equilibrium reconstruction has been implemented on the National Spherical Torus Experiment.The rtEFIT code originally developed for use DIII-D was adapted NSTX.The equilibria provide calculations of flux at points plasma boundary, which is used as input to a algorithm known isoflux control.The desired boundary location compared reference value, and this error basic feedback quantity poloidal 1 field coils hardware that comprises system described, well...
Progress in the development of integrated advanced ST plasma scenarios NSTX (Ono et al 2000 Nucl. Fusion 40 557) is reported. Recent high-performance plasmas following lithium coating facing surfaces have achieved higher elongation and lower internal inductance than previously. Analysis thermal confinement these lithiumized discharges shows a stronger current weaker toroidal field dependence previous scaling studies; ITER-98(y, 2) expression describes reasonably well. during periods free MHD...
Early life stress (ELS) is associated with increased risk for internalizing disorders and variations in gray matter development. It unclear, however, whether ELS affects normative age-related changes white (WM) morphology, if such maturational differences are psychopathology. We conducted comprehensive interviews a cross-sectional sample of young adolescents (N = 156; 89 F; Ages 9–14) to assess lifetime exposure objective cumulative severity. used diffusion-weighted imaging measure WM...
A new type of high-resolution x-ray imaging crystal spectrometer is being developed to measure ion and electron temperature profiles in tokamak plasmas. The instrument particularly valuable for diagnosing plasmas with purely ohmic heating rf heating, since it does not require the injection a neutral beam—although can also be used diagnosis neutral-beam heated consists spherically bent quartz two-dimensional position-sensitive detector. It records spectra helium-like argon (or krypton) from...
A new high speed infrared camera has been successfully implemented and produced first set of heat flux measurements on the lower divertor tiles in NSTX tokamak. High spatial temporal resolutions, 6.4 mm 1.6-6.3 kHz, respectively, enable us to investigate detailed structure deposition pattern caused by transient events such as edge localized modes. comparison data with a slow viewing same region interest shows good agreement between two independent measurements. Data analysis for various...
The National Spherical Torus Experiment (NSTX) has made considerable progress in advancing the scientific understanding of high performance long-pulse plasmas needed for future spherical torus (ST) devices and ITER.Plasma durations up to 1.6 s (five current redistribution times) have been achieved at plasma currents 0.7 MA with non-inductive fractions above 65% while simultaneously achieving β T N values 17% 5.7 (%m -1 ), respectively.A newly available motional Stark effect diagnostic...
H-modes are routinely obtained in the National Spherical Torus Experiment (NSTX) and have become a standard operational scenario. L–H transitions triggered by NBI heating been over wide parameter range Ip, Bt, e either lower-single-null (LSN) or double-null (DN) diverted discharges. Edge localized modes observed both configurations but characteristics differ between DN LSN, which also different triangularities (δ). An H-mode duration of 500 ms was with total pulse length ∼1 s. Preliminary...
The National Spherical Torus Experiment (NSTX) has explored the effects of shaping on plasma performance as determined by many diverse topics including stability global magnetohydrodynamic (MHD) modes (e.g., ideal external kinks and resistive wall modes), edge localized (ELMs), bootstrap current drive, divertor flux expansion, heat transport. Improved capability been crucial to achieving βt∼40%. Precise shape control achieved NSTX using real-time equilibrium reconstruction. simultaneously...
Edge parameters play a critical role in high confinement mode (H-mode) access, which is key component of discharge optimization present day toroidal experiments and the design next generation devices. Because edge magnetic topology spherical torus (ST) differs from conventional aspect ratio tokamak, H-modes STs exhibit important differences compared with tokamaks. The dependence National Spherical Torus Experiment (NSTX) [C. Neumeyer et al., Fusion Eng. Des. 54, 275 (2001)] plasma on heating...
The National Spherical Torus Experiment (NSTX) is a low aspect-ratio fusion research facility whose goal to make determination of the attractiveness spherical torus concept in areas high-β stability, confinement, current drive, and divertor physics. Remarkable progress was made extending operational regime device FY 2002. In brief, βt 34% βN 6.5 were achieved. H-mode became main regime, energy confinement exceeded conventional tokamak scalings. Heating demonstrated with radiofrequency...
In order to reduce recirculating power fraction acceptable levels, the spherical torus concept relies on simultaneous achievement of high toroidal β and bootstrap in steady state. last year, as a result plasma control system improvements, achievable elongation NSTX has been raised from κ ∼ 2.1 2.6—approximately 25% increase. This increase led substantial for long pulse discharges. The is associated with an current at nearly fixed poloidal β, which enables higher βt constant fraction. As...
Individual neurons in the brain have complex intrinsic dynamics that are highly diverse. We hypothesize produced by networks of and heterogeneous may contribute to brain's ability process respond temporally data. To study role neuronal network computation, we develop a rate-based model, generalized-leaky-integrate-and-fire-rate (GLIFR) which is rate equivalent generalized-leaky-integrate-and-fire model. The GLIFR model has multiple dynamical mechanisms, add complexity its activity while...
We have designed and constructed a system for control of the normalized β (βN) in National Spherical Torus Experiment [M. Ono et al., Nucl. Fusion, Vol. 40, p. 557 (2000)]. A proportional-integral-derivative operator is applied to difference between present value βN (from real-time equilibrium reconstruction) time-dependent request order calculate required injected power. This power then turned into modulations neutral beams. The details this algorithm are described, including techniques...
An infrared imaging system has been installed on the National Spherical Torus Experiment at Princeton Plasma Physics Laboratory to measure surface temperatures lower divertor and center stack. The is based an Indigo Alpha 160×128 microbolometer camera with 12 bits/pixel operating in 7–13 μm range a 30 Hz frame rate dynamic temperature of 0–700 °C. From these data knowledge graphite thermal properties, heat flux derived classic one-dimensional conduction model. Preliminary results scaling are...
Background Suicidal ideation (SI) typically emerges during adolescence but is challenging to predict. Given the potentially lethal consequences of SI, it important identify neurobiological and psychosocial variables explaining severity SI in adolescents. Methods In 106 participants (59 female) recruited from community, we assessed characteristics obtained resting‐state fMRI data early (baseline: aged 9–13 years). Across 250 brain regions, local graph theory‐based properties...
Abstract The Allen Mouse Brain Connectivity Atlas consists of anterograde tracing experiments targeting diverse structures and classes projecting neurons. Beyond regional done in C57BL/6 wild-type mice, a large fraction are performed using transgenic Cre-lines. This allows access to cell-class-specific whole-brain connectivity information, with class defined by the lines. However, even though number is large, it does not come close covering all existing cell every area where they exist....