Helena X. Ren

ORCID: 0000-0003-0221-2560
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About
Contact & Profiles
Research Areas
  • Astrophysics and Cosmic Phenomena
  • Gamma-ray bursts and supernovae
  • Astrophysical Phenomena and Observations
  • Dark Matter and Cosmic Phenomena
  • Particle Detector Development and Performance
  • Neutrino Physics Research
  • Galaxies: Formation, Evolution, Phenomena
  • Pulsars and Gravitational Waves Research
  • Radiation Detection and Scintillator Technologies
  • Nuclear Physics and Applications
  • Radio Astronomy Observations and Technology
  • Electrowetting and Microfluidic Technologies
  • High-Energy Particle Collisions Research
  • Particle physics theoretical and experimental studies
  • Integrated Circuits and Semiconductor Failure Analysis
  • Astronomical Observations and Instrumentation
  • Microfluidic and Capillary Electrophoresis Applications
  • Biosensors and Analytical Detection
  • Advanced Optical Sensing Technologies
  • Atmospheric Ozone and Climate
  • Radioactivity and Radon Measurements
  • Advanced X-ray and CT Imaging
  • Opportunistic and Delay-Tolerant Networks
  • Microfluidic and Bio-sensing Technologies
  • Advanced Biosensing Techniques and Applications

United Imaging Healthcare (China)
2024

Max Planck Institute for Nuclear Physics
2022-2024

Institut de Recherche sur les Lois Fondamentales de l'Univers
2023

CEA Paris-Saclay
2023

Université Paris-Saclay
2023

Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2023

ETH Zurich
2023

Laboratoire Leprince-Ringuet
2023

Istituto Nazionale di Fisica Nucleare, Sezione di Padova
2023

Université de Montpellier
2023

Context. The detection of quasi-periodic oscillations (QPOs) in the light curves active galactic nuclei (AGNs) can provide insights into physics super-massive black holes (SMBHs) powering these systems and could represent a signature existence SMBH binaries, setting fundamental constraints on evolution Universe. Aims. identification long-term QPOs, characterized by periods order several months to years, is particularly challenging only be achieved via all-sky monitoring instruments that...

10.1051/0004-6361/202244754 article EN cc-by Astronomy and Astrophysics 2023-01-11

In this work, results and data are reported on key aspects of sample processing protocols performed on-chip in a digital microfluidic lab-on-a-chip. We report the experiments processing, including preconcentration dilution, injection or dispensing, mixing. It is shown that high speed transport mixing analytes reagents can be using biological solutions without system contamination.

10.1109/iedm.2003.1269396 article EN 2004-03-22

The central molecular zone (CMZ) is a unique environment in our Galaxy, with extreme conditions to test understanding of the gas, dust, and cosmic-ray (CR) physics. Our goal estimate total gas mass direction Galactic centre (GC), quantify various associated uncertainties, discuss implications for estimates CR energy densities dust opacities. 21 cm line carbon monoxide isotopes ( (J = 1 → 0) 0; J 2 1), 1)) emission maps were used derive column density. CMZ separated from disk contribution...

10.1051/0004-6361/202554033 article EN Astronomy and Astrophysics 2025-04-03

P38 kinase plays a vital role in the inflammation mediated by tumor necrosis factor-α and interleukin-1β pathways, thus inhibitors of p38 provide effective approach for treatment inflammatory diseases. Presently, combined study threedimensional quantitative structure-activity relationship, molecular docking dynamics (MD) was undertaken to explore structural insights 174 2-thioimidazole compounds influencing p38α inhibitory activities. Both ligand-based resultant comparative field analysis...

10.2174/092986712802002608 article EN Current Medicinal Chemistry 2012-07-01

Abstract Identification of Cherenkov light generated by muons has been suggested as a promising way to dramatically improve the background rejection power Imaging Atmospheric Telescope (IACT) arrays at high energies. However, muon identification remains challenging task, for which efficient algorithms are still being developed. We present an approach in which, rather than identifying from muons, we simply consider presence other main shower image IACTs with large mirror area. show that case...

10.1140/epjc/s10052-022-11067-5 article EN cc-by The European Physical Journal C 2022-12-10

Abstract The Tarantula Nebula in the Large Magellanic Cloud is known for its high star formation activity. At center lies young massive cluster R136, providing a significant amount of energy that makes nebula shine so brightly at many wavelengths. Recently, clusters have been suggested to also efficiently produce very high-energy cosmic rays, potentially beyond PeV energies. Here, we report detection very-high-energy γ -ray emission from direction R136 with High Energy Stereoscopic System,...

10.3847/2041-8213/ad5e67 article EN cc-by The Astrophysical Journal Letters 2024-07-01

The detection of quasi-periodic oscillations (QPOs) in the emission active galactic nuclei (AGNs) can provide insights into physics super-massive black-holes (SMBHs) powering these systems, and could represent a signature existence SMBH binaries. identification long term QPOs, characterized by periods on order several months to years, is particularly challenging only be achieved via all-sky monitoring instruments like Fermi-LAT satellite. We aim identify QPOs $\gamma$-ray light-curves...

10.22323/1.417.0167 article EN cc-by-nc-nd 2023-04-19

Identification of Cherenkov light generated by muons has been suggested as a promising way to dramatically improve the background rejection power Imaging Atmospheric Telescopes (IACT) arrays at high energies. However, muon identification remains challenging task, for which efficient algorithms are still being developed. We present an algorithm in which, rather than identifying from muons, we simply consider presence other main shower image IACT with large mirror area. show that case H.E.S.S....

10.22323/1.417.0219 article EN cc-by-nc-nd 2023-05-08

The Galactic Centre (GC) region is a highly interesting for very high energy gamma-ray studies due to its proximity and diverse sources. It also unique place Dark Matter (DM) searches, since we expect large amount of DM in this it nearby. Currently new detector under development observe the GC region, called Southern Wide field-of-view Gamma-ray Observatory (SWGO). This instrument will be first water Cherenkov located Hemisphere sensitive >100 GeV gamma rays. In our work, are going present...

10.22323/1.444.0893 article EN cc-by-nc-nd Proceedings of 36th International Cosmic Ray Conference — PoS(ICRC2019) 2023-07-27

Specific probes against targets play siginificant role in biosensing and bioanalysis.The landscape phage library f8/8 displaying random octapeptides on the pVIII coat protein of fd-tet, demonstrating many excellent features including multivalency, stability, high structural homogeneity.In this talk, we present our recent advance selecting specific clones binding with different such as free prostate-specific antigen (fPSA), cellulase, ubiquitous pathogens from library.Then developed a series...

10.5162/imcs2018/dh1.4 article EN Proceedings IMCS 2012 2018-01-01

Identification of Cherenkov light generated by muons has been suggested as a promising way to dramatically improve the background rejection power Imaging Atmospheric Telescope (IACT) arrays at high energies. However, muon identification remains challenging task, for which efficient algorithms are still being developed. We present an approach in which, rather than identifying from muons, we simply consider presence other main shower image IACTs with large mirror area. show that case H.E.S.S....

10.48550/arxiv.2211.13167 preprint EN cc-by arXiv (Cornell University) 2022-01-01
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