155 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Vietnam National University Ho Chi Minh CityVN26 papers
- Centre National de la Recherche ScientifiqueFR8 papers
- Centro de AstrobiologíaES8 papers
- Ho Chi Minh City University of ScienceVN8 papers
- Institute of Astronomy and Astrophysics, Academia SinicaTW7 papers
- Instituto de Astrofísica de CanariasES6 papers
- University of Medicine and Pharmacy at Ho Chi Minh CityVN6 papers
- University of Central FloridaUS5 papers
- Academia SinicaTW4 papers
- Center for Astrophysics Harvard & SmithsonianUS4 papers
- Lyon 1 UniversitéFR4 papers
- Max Planck Institute for AstronomyDE4 papers
41 papers
Wariness and Poverty Traps
Hai Ha Pham, Ngoc-Sang Pham
We investigate the effects of wariness (defined as individuals' concern for their minimum utility over time) on poverty traps and equilibrium multiplicity in an overlapping generat…
Formal Reasoning for Intelligent QA Systems: A Case Study in the Educational Domain
Tuan Bui, An Nguyen, Phat Thai +8
Reasoning is essential for closed-domain QA systems in which procedural correctness and policy compliance are critical. While large language models (LLMs) have shown strong perform…
Distributionally Robust Wireless Semantic Communication with Large AI Models
Long Tan Le, Senura Hansaja Wanasekara, Zerun Niu +7
Semantic communication (SemCom) has emerged as a promising paradigm for 6G wireless systems by transmitting task-relevant information rather than raw bits, yet existing approaches…
Euclid: Quick Data Release (Q1) -- A photometric search for ultracool dwarfs in the Euclid Deep Fields
M. Žerjal, C. Dominguez-Tagle, N. Vitas +178
We present a catalogue of 5306 new ultracool dwarf (UCD) candidates in the three Euclid Deep Fields in the Q1 data release. They range from late M to late T dwarfs, and include 120…
A Finite Difference Scheme for (2+1)D Cubic-Quintic Nonlinear Schrödinger Equations with Nonlinear Damping
Anh Ha Le, Toan T. Huynh, Quan M. Nguyen
Solitons of the purely cubic nonlinear Schrödinger equation in a space dimension of suffer critical and supercritical collapses. These solitons can be stabilized in a cu…
Euclid: Early Release Observations -- A glance at free-floating new-born planets in the sigma Orionis cluster
E. L. Martín, M. {Ž}erjal, H. Bouy +175
We provide an early assessment of the imaging capabilities of the Euclid space mission to probe deeply into nearby star-forming regions and associated very young open clusters, and…
DiffSpectralNet : Unveiling the Potential of Diffusion Models for Hyperspectral Image Classification
Neetu Sigger, Tuan Thanh Nguyen, Gianluca Tozzi +2
Hyperspectral images (HSI) have become popular for analysing remotely sensed images in multiple domain like agriculture, medical. However, existing models struggle with complex rel…
Analysis of a Crank-Nicolson finite difference scheme for (2+1)D perturbed nonlinear Schrödinger equations with saturable nonlinearity
Anh-Ha Le, Toan T. Huynh, Quan M. Nguyen
We analyze a Crank-Nicolson finite difference discretization for the perturbed (2+1)D nonlinear Schrödinger equation with saturable nonlinearity and a perturbation of cubic loss. W…
Extremely Buried Nucleus of IRAS 172080014 Observed at Sub-Millimeter and Near-Infrared Wavelengths
Shunsuke Baba, Masatoshi Imanishi, Takuma Izumi +6
The ultraluminous infrared galaxy IRAS 172080014 is a late-stage merger that hosts a buried active galactic nucleus (AGN). To investigate its nuclear structure, we performed hig…
Cross-checking SMBH mass estimates in NGC 6958 -- I: Stellar dynamics from adaptive optics-assisted MUSE observations
Sabine Thater, Davor Krajnović, Peter M. Weilbacher +9
Supermassive black hole masses (MBH) can dynamically be estimated with various methods and using different kinematic tracers. Different methods have only been cross-checked for a s…
On planet formation around supermassive black holes and the grain disruption barriers by radiative torques
Nguyen Chau Giang, Thiem Hoang, Le Ngoc Tram +5
It has recently been suggested that planets can form by dust coagulation in the torus of active galactic nuclei (AGN) with low luminosity of $L_{\rm bol}\lesssim 10^{42} erg s^{-1}…
The MBHBM Project -- II. Molecular Gas Kinematics in the Lenticular Galaxy NGC 3593 Reveal a Supermassive Black Hole
Dieu D. Nguyen, Martin Bureau, Sabine Thater +15
As part of the Measuring Black Holes in Below Milky Way-mass (M) galaxies (MBHBM) Project, we present a dynamical measurement of the supermassive black hole (SMBH)…
Modeling extinction and reddening effects by circumstellar dust in the Betelgeuse envelope in the presence of radiative torque disruption
Bao Truong, Le Ngoc Tram, Thiem Hoang +9
Circumstellar dust is formed and evolved within the envelope of evolved stars, including Asymptotic Giant Branch (AGB) and Red Supergiant (RSG). The extinction of stellar light by…
Spatially Resolving the Star Formation Histories of Three Nearby Nuclear Star Clusters
Christian H. Hannah, Anil C. Seth, Dieu D. Nguyen +4
The formation of nuclear star clusters (NSCs) remains an open question. In this work, we use spatially resolved HST/STIS spectroscopic observations of three nearby NSCs (hosted by…
Hard X-ray Irradiation Potentially Drives Negative AGN Feedback by Altering Molecular Gas Properties
Taiki Kawamuro, Claudio Ricci, Takuma Izumi +4
To investigate the role of active galactic nucleus (AGN) X-ray irradiation on the interstellar medium (ISM), we systematically analyzed Chandra and ALMA CO(=2-1) data for 26 ult…
Studying magnetic fields and dust in M17 using polarized thermal dust emission observed by SOFIA/HAWC+
Thuong Duc Hoang, Nguyen Bich Ngoc, Pham Ngoc Diep +12
We report the highest spatial resolution measurement of magnetic fields in M17 using thermal dust polarization taken by SOFIA/HAWC+ centered at 154 m wavelength. Using the Davis…
Relaxed Lagrangian duality in convex infinite optimization: reverse strong duality and optimality
Nguyen Dinh, Miguel A. Goberna, Marco A. Lopez +1
We associate with each convex optimization problem posed on some locally convex space with an infinite index set T, and a given non-empty family H formed by finite subsets of T, a…
CDN-MEDAL: Two-stage Density and Difference Approximation Framework for Motion Analysis
Synh Viet-Uyen Ha, Cuong Tien Nguyen, Hung Ngoc Phan +2
Background modeling and subtraction is a promising research area with a variety of applications for video surveillance. Recent years have witnessed a proliferation of effective lea…
On distributional and asymptotic results for exponential functional of renewal -- reward processes describing risk models
J. Akahori, C. Constantinescu, Y. Imamura +1
Inspired by the double-debt problem in Japan where the mortgagor has to pay the remaining loan even if their house was destroyed by a catastrophic event, we model the lender's cash…
Transfer learning with class-weighted and focal loss function for automatic skin cancer classification
Duyen N. T. Le, Hieu X. Le, Lua T. Ngo +1
Skin cancer is by far in top-3 of the world's most common cancer. Among different skin cancer types, melanoma is particularly dangerous because of its ability to metastasize. Early…
Sporadic and intense accretion in a 1 Myr-old brown dwarf candidate
D. Nguyen-Thanh, N. Phan-Bao, S. J. Murphy +1
Studying the accretion process in very low-mass objects has important implications for understanding their formation mechanism. Many nearby late-M dwarfs that have previously been…
Sectional convexity of epigraphs of conjugate mappings with applications to robust vector duality
Dinh Nguyen, Long Dang Hai
This paper concerns the robust vector problems \begin{equation*} \mathrm{(RVP)}\ \ {\rm Wmin}\left\{ F(x): x\in C,\; G_u(x)\in -S,\;\forall u\in\mathcal{U}\right\}, \end{equation*}…
Universality of the amplitude shift in fast two-pulse collisions in weakly perturbed linear physical systems
Quan M. Nguyen, Toan T. Huynh, Avner Peleg
We demonstrate that the amplitude shifts in fast two-pulse collisions in perturbed linear physical systems with weak nonlinear dissipation exhibit universal soliton-like behavior.…
Frequency shifting for solitons based on transformations on the Fourier domain and applications
Quan M. Nguyen, Toan T. Huynh
We develop the theoretical procedures for shifting the frequency of a single soliton and of a sequence of solitons of the nonlinear Schrödinger equation. The procedures are based o…