Shaw H. Chen
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View article: Assessment of Frozen Stored Silver Carp Surimi Gel Quality Using Synthetic Data-Driven Machine Learning (SDDML) Model
Assessment of Frozen Stored Silver Carp Surimi Gel Quality Using Synthetic Data-Driven Machine Learning (SDDML) Model Open
The invasive Silver Carp (Hypophthalmichthys molitrix) in North America represents a promising resource for surimi production; however, its gel formability deteriorates significantly during frozen storage. This study investigated the deter…
View article: Can We Find the Code? An Empirical Study of Google Scholar's Code Retrieval
Can We Find the Code? An Empirical Study of Google Scholar's Code Retrieval Open
Academic codes associated with research papers are valuable resources for scholars. In specialized fields outside computer science, code availability is often limited, making effective code retrieval essential. Google Scholar is a crucial …
View article: Constraining the Cosmic-ray Energy Based on Observations of Nearby Galaxy Clusters by LHAASO
Constraining the Cosmic-ray Energy Based on Observations of Nearby Galaxy Clusters by LHAASO Open
Galaxy clusters act as reservoirs of high-energy cosmic rays (CRs). As CRs propagate through the intracluster medium, they generate diffuse $γ$-rays detectable by arrays such as LHAASO. These $γ$-rays result from proton-proton ($pp$) colli…
View article: An Enigmatic PeVatron in an Area around H <scp>ii</scp> Region G35.6−0.5
An Enigmatic PeVatron in an Area around H <span>ii</span> Region G35.6−0.5 Open
Identifying Galactic PeVatrons (PeV particle accelerators) from ultrahigh-energy (UHE, >100 TeV) γ -ray sources plays a crucial role in revealing the origin of Galactic cosmic rays. The UHE source 1LHAASO J1857+0203u is suggested to be ass…
View article: Detection of two TeV gamma-ray outbursts from NGC 1275 by LHAASO
Detection of two TeV gamma-ray outbursts from NGC 1275 by LHAASO Open
The Water Cherenkov Detector Array (WCDA) is one of the components of Large High Altitude Air Shower Observatory (LHAASO) and can monitor any sources over two-thirds of the sky for up to 7 hours per day with >98\% duty cycle. In this work,…
View article: Detection of Very High-energy Gamma-Ray Emission from the Radio Galaxy M87 with LHAASO
Detection of Very High-energy Gamma-Ray Emission from the Radio Galaxy M87 with LHAASO Open
The nearby radio galaxy M87 is a very high-energy (VHE) gamma-ray emitter established by observations with ground-based gamma-ray detectors. Here we report the long-term monitoring of M87 from 2021 to 2024 with the Large High Altitude Air …
View article: Measurement of attenuation length of the muon content in extensive air showers from 0.3 to 30 PeV with LHAASO
Measurement of attenuation length of the muon content in extensive air showers from 0.3 to 30 PeV with LHAASO Open
The attenuation length of the muon content in extensive air showers provides important information regarding the generation and development of air showers. This information can be used not only to improve the description of such showers bu…
View article: LHAASO detection of very-high-energy gamma-ray emission surrounding PSR J0248+6021
LHAASO detection of very-high-energy gamma-ray emission surrounding PSR J0248+6021 Open
We report the detection of an extended very-high-energy (VHE) gamma-ray source coincident with the location of middle-aged (62.4~\rm kyr) pulsar PSR J0248+6021, by using the LHAASO-WCDA data of live 796 days and LHAASO-KM2A data of live 12…
View article: Deep view of Composite SNR CTA1 with LHAASO in $γ$-rays up to 300 TeV
Deep view of Composite SNR CTA1 with LHAASO in $γ$-rays up to 300 TeV Open
The ultra-high-energy (UHE) gamma-ray source 1LHAASO J0007+7303u is positionally associated with the composite SNR CTA1 that is located at high Galactic Latitude $b\approx 10.5^\circ$. This provides a rare opportunity to spatially resolve …
View article: Observation of the $γ$-ray Emission from W43 with LHAASO
Observation of the $γ$-ray Emission from W43 with LHAASO Open
In this paper, we report the detection of the very-high-energy (VHE, $ 100{\rm\ GeV} < E < 100{\rm\ TeV} $) and ultra-high-energy (UHE, $E > 100\rm\ TeV$) $γ$-ray emissions from the direction of the young star-forming region W43, observed …
View article: Stringent Tests of Lorentz Invariance Violation from LHAASO Observations of GRB 221009A
Stringent Tests of Lorentz Invariance Violation from LHAASO Observations of GRB 221009A Open
On 9 October 2022, the Large High Altitude Air Shower Observatory (LHAASO) reported the observation of the very early TeV afterglow of the brightest-of-all-time gamma-ray burst 221009A, recording the highest photon statistics in the TeV ba…
View article: Minimum Enclosing Ball Synthetic Minority Oversampling Technique from a Geometric Perspective
Minimum Enclosing Ball Synthetic Minority Oversampling Technique from a Geometric Perspective Open
Class imbalance refers to the significant difference in the number of samples from different classes within a dataset, making it challenging to identify minority class samples correctly. This issue is prevalent in real-world classification…
View article: Constraints on Ultra Heavy Dark Matter Properties from Dwarf Spheroidal Galaxies with LHAASO Observations
Constraints on Ultra Heavy Dark Matter Properties from Dwarf Spheroidal Galaxies with LHAASO Observations Open
In this work we try to search for signals generated by ultra-heavy dark matter at the Large High Altitude Air Shower Observatory (LHAASO) data. We look for possible gamma-ray by dark matter annihilation or decay from 16 dwarf spheroidal ga…
View article: Data quality control system and long-term performance monitor of the LHAASO-KM2A
Data quality control system and long-term performance monitor of the LHAASO-KM2A Open
The KM2A is the largest sub-array of the Large High Altitude Air Shower Observatory (LHAASO). It consists of 5216 electromagnetic particle detectors (EDs) and 1188 muon detectors (MDs). The data recorded by the EDs and MDs are used to reco…
View article: Discovery of Very-high-energy Gamma-ray Emissions from the Low Luminosity AGN NGC 4278 by LHAASO
Discovery of Very-high-energy Gamma-ray Emissions from the Low Luminosity AGN NGC 4278 by LHAASO Open
The first source catalog of Large High Altitude Air Shower Observatory reported the detection of a very-high-energy gamma ray source, 1LHAASO J1219+2915. In this paper a further detailed study of the spectral and temporal behavior of this …
View article: LHAASO-KM2A detector simulation using Geant4
LHAASO-KM2A detector simulation using Geant4 Open
KM2A is one of the main sub-arrays of LHAASO, working on gamma ray astronomy\nand cosmic ray physics at energies above 10 TeV. Detector simulation is the\nimportant foundation for estimating detector performance and data analysis. It\nis a…
View article: Does or Did the Supernova Remnant Cassiopeia A Operate as a PeVatron?
Does or Did the Supernova Remnant Cassiopeia A Operate as a PeVatron? Open
For decades, supernova remnants (SNRs) have been considered the prime sources of Galactic cosmic rays (CRs). But whether SNRs can accelerate CR protons to PeV energies and thus dominate CR flux up to the knee is currently under intensive t…
View article: Shear-Assembly of Crack-Free, Mesomorphic Ceramics from Zinc Oxide Nanorods for Waveplates
Shear-Assembly of Crack-Free, Mesomorphic Ceramics from Zinc Oxide Nanorods for Waveplates Open
Mesomorphic ceramics include inorganic solids with liquid crystalline superstructures and show great promise as waveplates for high-power lasers. Waveplates require sufficiently thick, birefringent, and uniform films, and mesomorphic ceram…
View article: An Ultrahigh-energy $γ$-ray Bubble Powered by a Super PeVatron
An Ultrahigh-energy $γ$-ray Bubble Powered by a Super PeVatron Open
We report the detection of a $γ$-ray bubble spanning at least 100$\rm deg^2$ in ultra high energy (UHE) up to a few PeV in the direction of the star-forming region Cygnus X, implying the presence Super PeVatron(s) accelerating protons to a…
View article: Very high energy gamma-ray emission beyond 10 TeV from GRB 221009A
Very high energy gamma-ray emission beyond 10 TeV from GRB 221009A Open
The highest energy gamma-rays from gamma-ray bursts (GRBs) have important implications for their radiation mechanism. Here we report for the first time the detection of gamma-rays up to 13 TeV from the brightest GRB 221009A by the Large Hi…
View article: Aqueous Coassembly of Small TiO<sub>2</sub> Nanorods with Cellulose Nanocrystals into Transparent, Uniaxially Aligned Inorganic Thin Films for Waveplates
Aqueous Coassembly of Small TiO<sub>2</sub> Nanorods with Cellulose Nanocrystals into Transparent, Uniaxially Aligned Inorganic Thin Films for Waveplates Open
Mesomorphic ceramic films comprising uniaxially oriented short nanorods with a modest aspect ratio are desired for a wide range of applications, including waveplates requiring optical transparency and optoelectronics benefiting from enhanc…
View article: High-Temperature Enantiomeric Glassy Liquid Crystals with Exclusive Cholesteric Mesomorphism
High-Temperature Enantiomeric Glassy Liquid Crystals with Exclusive Cholesteric Mesomorphism Open
Glassy liquid crystals are a unique class of materials that can preserve their spontaneously ordered liquid crystalline state upon cooling through the glass-transition temperature. Cholesteric glassy liquid crystals (ChGLCs), in particular…
View article: Spontaneous Co-Assembly of Cellulose Nanocrystals and TiO<sub>2</sub> Nanorods Followed by Calcination to Form Cholesteric Inorganic Nanostructures
Spontaneous Co-Assembly of Cellulose Nanocrystals and TiO<sub>2</sub> Nanorods Followed by Calcination to Form Cholesteric Inorganic Nanostructures Open
Chiral nanomaterials possess unique electronic, magnetic, and optical properties that are relevant to a wide range of applications including photocatalysis, chiral photonics, and biosensing. A simple, bottom-up method to create chiral, ino…
View article: A model rural rehabilitation service station in China– Evaluation after 5 years
A model rural rehabilitation service station in China– Evaluation after 5 years Open
A simple setup for rehabilitation training was established in 2007 in a rural area of Shanxi Province, China. It made use of an underused facility created for elderly people’s leisure time. Simple equipment for rehabilitation training was …
View article: Mesomorphic Ceramic Film Fabricated via Blade Coating of a Lyotropic Nematic Liquid Crystal for High-Power Lasers
Mesomorphic Ceramic Film Fabricated via Blade Coating of a Lyotropic Nematic Liquid Crystal for High-Power Lasers Open
Mesomorphic ceramic films are fabricated over large areas by blade coating of a lyotropic nematic sol of zinc oxide nanorods. Upon calcination to remove organics, continuous monodomain films with a uniform thickness result as transparent c…