A5004204741- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
- Stellar, planetary, and galactic studies
- Handwritten Text Recognition Techniques
- Process Optimization and Integration
- Advanced Vision and Imaging
- Advanced Image and Video Retrieval Techniques
- Astronomical Observations and Instrumentation
- Smart Grid Energy Management
- Cosmology and Gravitation Theories
- Advanced Control Systems Optimization
- Digital Media Forensic Detection
- Natural Language Processing Techniques
- Algorithms and Data Compression
- Topic Modeling
- Advanced Image Processing Techniques
- Capital Investment and Risk Analysis
- Astrophysics and Star Formation Studies
- Network Security and Intrusion Detection
- Radio Astronomy Observations and Technology
- Distributed Sensor Networks and Detection Algorithms
- Advanced Neural Network Applications
- Advanced Text Analysis Techniques
- Spam and Phishing Detection
- Fault Detection and Control Systems
Queen's University
2019-2024
New York University Abu Dhabi
2023-2024
Carnegie Mellon University
2001-2023
Indian Institute of Technology Roorkee
2022
Samsung (India)
2021
National Institute of Technology Kurukshetra
2021
Delhi Technological University
2019-2020
Samsung (United States)
2020
Wipro (India)
2019
Jaypee University of Information Technology
2017
We show that a Denoising Diffusion Probabalistic Model (DDPM), class of score-based generative model, can be used to produce realistic mock images mimic observations galaxies. Our method is tested with Dark Energy Spectroscopic Instrument (DESI) grz imaging galaxies from the Photometry and Rotation curve OBservations Extragalactic Surveys (PROBES) sample selected Sloan Digital Sky Survey. Subjectively, generated are highly when compared samples real dataset. quantify similarity by borrowing...
Zoned Namespace (ZNS) SSDs are the latest evolution of host-managed flash storage, enabling improved performance at a lower cost-per-byte than traditional block interface (conventional) SSDs. To date, there is no support for arranging these new devices in arrays that offer increased throughput and reliability (RAID). We identify key challenges designing redundant ZNS SSD arrays, such as managing metadata updates persisting partial stripe writes absence overwrite from device. present RAIZN,...
We use hydrodynamical cosmological simulations to show that it is possible create, via tidal interactions, galaxies lacking dark matter in a dominated universe. select dwarf from the NIHAO project, obtained standard Cold Dark Matter model and them as initial conditions for of satellite-central interactions. After just one pericentric passage on an orbit with strong radial component, can lose up 80 per~cent their content, but, most interestingly, central ($\approx 8$~kpc) stellar ratio...
We present a compendium of disk galaxy scaling relations and detailed characterization their intrinsic scatter. Observed are typically characterized by slope, intercept, scatter; however, these parameters mixture observational errors astrophysical processes. introduce novel Bayesian framework for computing the scatter that accounts nonlinear error propagation covariant uncertainties. scatters ~25percent more accurate than those obtained with first-order classical method, which systematically...
We present an automated non-parametric light profile extraction pipeline called AutoProf. All steps for extracting surface brightness (SB) profiles are included in AutoProf, allowing streamlined analyses of galaxy images. AutoProf improves upon previous ellipse fitting implementations with fit-stabilization procedures adapted from machine learning techniques. Additional advanced analysis methods the flexible alternative (along radial or axial slices), smooth axisymmetric models, and...
ABSTRACT We present a catalogue of dynamical properties for 2368 late-type galaxies from the MaNGA survey. The latter complements photometric same sample based on deep optical dark energy sky instrument legacy imaging survey (DESI) photometry processed with autoprof . Rotation curves (RCs), extracted by model-fitting H α velocity maps Data Analysis Pipeline, extend out to 1.4 (1.9) Re primary (secondary) samples, respectively. RCs and ancillary Pipe3D data products were used construct...
In this paper, we address the optimization of industrial gas distribution systems, which consist plants and customers, as well storage tanks, trucks, trailers. A mixed-integer linear programming (MILP) model is presented to minimize total capital operating costs, integrate short-term planning decisions for vehicle routing with long-term inventory sizing tanks at customer locations. order optimize asset allocation in network by incorporating decisions, also takes into account synergies among...
ABSTRACT We present an extensive catalogue of non-parametric structural properties derived from optical and mid-infrared imaging for 4585 galaxies the MaNGA survey. DESI Wide-field Infrared Survey Explorer (WISE) are used to extract surface brightness profiles in g, r, z, W1, W2 photometric bands. Our photometry takes advantage automated algorithm autoprof probes brightnesses that typically reach below 29 mag arcsec−2 r-band, while our WISE achieves 28 W1-band. Neighbour density measures...
ABSTRACT An extensive catalogue of spatially resolved galaxy rotation curves (RCs) and multiband optical light profiles for 1752 observed spiral galaxies is assembled to explore the drivers diversity in structural parameters, RC shapes, stellar mass profiles. Similar data were extracted from ‘Numerical Investigation a Hundred Astrophysical Objects’ simulations identify any differences between observations simulations. Several including inner slope $\mathcal {S}$ RC, tested diversity. Two...
ABSTRACT We present astrophot, a fast, powerful, and user-friendly python based astronomical image photometry solver. astrophot incorporates automatic differentiation graphics processing unit (GPU), or parallel central (CPU), acceleration, powered by the machine learning library pytorch. Everything: can fit models for sky, stars, galaxies, point spread functions (PSFs), more in principled χ2 forward optimization, recovering Bayesian posterior information covariance of all parameters....
We present 'Pix2Prof', a deep learning model that can eliminate any manual steps taken when extracting galaxy profiles. argue profile of sort is conceptually similar to natural language image caption. This idea allows us leverage captioning methods from the field processing, and so we design Pix2Prof as float sequence 'captioning' suitable for inference. demonstrate technique by approximating surface brightness (SB) fitting method contains several steps. processes $\sim$1 per second on an...
We consider an application of the trust-region SQP algorithm described by Arora and Biegler (Comput. Optim. Appl., in press) to parameter estimation for a polymerization reactor. In particular, we are interested robustness this solving ill-conditioned optimization problems with differential algebraic (DAE) models. For system, it is possible measure variety states, such as production concentrations. Some these states contain more information lead reliable estimates than would be obtained if...
ABSTRACT This paper presents a study of the impact supermassive black hole (SMBH) feedback on dark matter (DM) haloes in numerical NIHAO (Numerical Investigation Hundred Astrophysical Object) simulations galaxies. In particular, amount DM displaced via active galactic nuclei (AGNs) and physical scale over which AGN affects halo are quantified by comparing with without feedback. galaxies log (M*/M⊙) ≥ 10.0 show growing central suppression 0.2 dex (∼40 per cent) from z = 1.5 to present...
We present the first set of galaxy scaling relations derived from kinematic models Widefield ASKAP L-band Legacy All-sky Blind surveY (WALLABY) pilot phase observations. Combining results and second data releases, there are 236 available models. develop a framework for robustly measuring HI disk structural properties these models; applicable to full WALLABY survey. Utilizing this framework, we obtained size, measure rotational velocity, angular momentum 148 galaxies. These comprise largest...
Automatic Toll Tax systems has reduced the heavy congestion caused at toll collection in metropolitan cities. As population is increasing day by which results high traffic on roads. Most of people find it difficult to be a part long queue for system. This causes fuel consumption while waiting payment, going extinct coming years. The research providing great solution this problem. LIFI emerging technology today's era. Here, we are using power wireless communication transmit user information...
ABSTRACT Recent observational and theoretical studies of the Local Group (LG) dwarf galaxies have highlighted their unique star-formation history, stellar metallicity, gas content, kinematics. We investigate commonality these features by comparing constrained LG field central halo simulations in Numerical Investigation a Hundred Astrophysical Objects (NIHAO) project. Our simulations, performed with NIHAO-like hydrodynamics which track evolution Milky Way (MW) M31 along ∼100 dwarfs LG, reveal...
Currently all countries are facing a common problem of fossil fuel shortages and many researchers finding various solution to provide green energy. A large part energy demand is increasing in transportation sector, which includes cars, bike, buses, trucks, auto-rickshaws more. Currently, these vehicles run on gasoline (petrol) or diesel, most vehicles, not combusted efficiently black thick smoke seen exhaust. Oxyhydrogen (HHO) cell used generate hydrogen gas using electrolysis water. This...
We present the Photometry and Rotation Curve Observations from Extragalactic Surveys (PROBES) compendium of extended rotation curves for 3163 late-type spirals, with matching homogeneous multiband photometry 1677 them. PROBES originally extracted Halpha long-slit spectra aperture synthesis HI (21cm) velocity maps typically extend out to a median 2R_e (or 1R_{23.5, r}). Our uniform takes advantage GALEX, DESI-LIS, WISE images software AutoProf yield azimuthally averaged surface brightness...
Off-the-grid energy has generated quite some interest in the recent years. Researchers are focused on trying to harvest from every possible source. Harvesting sources which don't result significant contribution towards needs is called scavenging, promotes saving ounce of energy. One such example tap electrical by making use force exerted humans as they walk. This pressurized weight can be converted form using piezo-electrical crystal. To ensure uninterrupted, off-the-grid supply, even when...
In this work, we analyze the role of AGN feedback in quenching star formation for massive, central galaxies local Universe. particular, compare prediction two semi-analytic models (L-GALAXIES and SAGE) featuring different schemes feedback, with SDSS DR7 taking advantage a novel technique identifying an observational dataset. This enables us to study correlation between model passive fractions, which is predicted be suppressed by from AGN, observed fractions observationally motivated...
The development of assistive technologies by means human machine interface is turning out to be one the most attractive areas today's research. Innovation in power consumption, signal processing and wireless communication has been focus for such systems. However, these devices have not reached mass market yet. This system incorporates Texas embedded processor, solutions highly-customized analog front ends. As a proof concept, this technology integrates MCU architecture, instrumentation...