Yiwen Zhang

ORCID: 0000-0003-2355-9416
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Research Areas
  • Cosmology and Gravitation Theories
  • Black Holes and Theoretical Physics
  • Astro and Planetary Science
  • Solar and Space Plasma Dynamics
  • Quantum Electrodynamics and Casimir Effect
  • Relativity and Gravitational Theory
  • Pulsars and Gravitational Waves Research
  • Animal Nutrition and Physiology
  • Solar Radiation and Photovoltaics
  • Stellar, planetary, and galactic studies
  • Effects of Environmental Stressors on Livestock
  • Soil Moisture and Remote Sensing
  • Agricultural pest management studies
  • Meat and Animal Product Quality
  • Ionosphere and magnetosphere dynamics
  • Microbial Metabolites in Food Biotechnology
  • Animal Behavior and Welfare Studies
  • Advanced SAR Imaging Techniques
  • Soybean genetics and cultivation
  • Planetary Science and Exploration
  • Geophysics and Gravity Measurements
  • Advanced Mathematical Theories and Applications
  • Muscle metabolism and nutrition
  • Radio Astronomy Observations and Technology
  • Wheat and Barley Genetics and Pathology

California Institute of Technology
2023-2025

Institute of Microbiology
2024

Chinese Academy of Sciences
2002-2024

State Key Laboratory of Microbial Resources
2024

Microbiology Institute of Shaanxi
2024

Nanjing University of Aeronautics and Astronautics
2024

Moscow Aviation Institute
2024

Institute of Subtropical Agriculture
2009-2016

National Astronomical Observatories
2009-2012

Kyoto University
2012

Abstract Tricarboxylic acid cycle (TCA cycle) plays an important role for aerobic growth of heterotrophic bacteria. Theoretically, eliminating TCA would decrease carbon dissipation and facilitate chemicals biosynthesis. Here, we construct E. coli strain without a functional that can serve as versatile chassis We first use adaptive laboratory evolution to recover in minimal medium cycle-deficient . Inactivation succinate dehydrogenase is key event the evolutionary trajectory. Supply...

10.1038/s41467-024-46655-4 article EN cc-by Nature Communications 2024-03-15

Solar spicules are the fundamental magnetic structures in chromosphere and considered to play a key role channelling corona. Recently, it was suggested by De Pontieu et al. that there were two types of with very different dynamic properties, which detected space- time plot technique Ca ii H line (3968 A) wavelength from Hinode/SOT observations. 'Type I' spicule, 3-7 minute lifetime, undergoes cycle upward downward motion; contrast, II' spicule fades away within dozens seconds, without...

10.1088/0004-637x/750/1/16 article EN The Astrophysical Journal 2012-04-11

We construct the phase space of a spherically symmetric causal diamond in (<a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mrow><a:mi>d</a:mi><a:mo>+</a:mo><a:mn>2</a:mn></a:mrow></a:math>)-dimensional Minkowski spacetime. Utilizing covariant formalism, we identify relevant degrees freedom that localize to <c:math xmlns:c="http://www.w3.org/1998/Math/MathML" display="inline"><c:mi>d</c:mi></c:math>-dimensional bifurcate horizon and, upon canonical quantization,...

10.1103/physrevlett.134.121501 article EN cc-by Physical Review Letters 2025-03-25

We study quantum spacetime fluctuations near light-sheet horizons associated with a Rindler wedge in anti--de Sitter (AdS) spacetime, the context of $\mathrm{AdS}/\mathrm{CFT}$. In particular, we solve vacuum Einstein equation horizon, augmented ansatz source smeared out Planckian width along one light-cone directions. Such source, whose physical interpretation is gravitational shock waves created by energy fluctuations, alters to stochastic partial differential taking form Langevin...

10.1103/physrevd.108.066002 article EN cc-by Physical review. D/Physical review. D. 2023-09-05

Rat was used to characterize Chinese Yam polysaccharides (CYPs). In Exp. 1 , maximum volume and rate of gas production in CYP 3-supplemented group were higher than other CYP-supplemented groups control group, while pH values NH3 contents 2-, 3-, 4-supplemented lower group. Contents acetate, propionate butyrate increased by supplementing 3 or 4 compared groups, except for glucose-supplemented isobutyrate CYPs decreased enhanced beneficial gut microbiota, but suppressed bacterial pathogens. 2...

10.1155/2009/598152 article EN cc-by International Journal of Microbiology 2009-01-01

We study the effects of geontropic vacuum fluctuations in quantum gravity on next-generation terrestrial gravitational wave detectors. If Verlinde-Zurek (VZ) effect proposed Verlinde and Zurek [Phys. Lett. B 822, 136663 (2021).], as modeled 826, 136910 (2022); Li et al. Phys. Rev. D 107, 024002 (2023)], appears upcoming GQuEST experiment, we show that it will be a large background for astrophysical searches observatories like Cosmic Explorer Einstein Telescope.

10.1103/physrevd.108.064038 article EN Physical review. D/Physical review. D. 2023-09-20

A bstract We study a correspondence between gravitational shockwave geometry and its fluid description near Rindler horizon in Minkowski spacetime. Utilizing the Petrov classification that describes algebraic symmetries for Lorentzian spaces, we establish an explicit mapping potential metric perturbation, where Einstein equation is equivalent to incompressibility condition of fluid, augmented by source. Then consider Ansatz stochastic quantum source which has physical interpretation...

10.1007/jhep05(2024)331 article EN cc-by Journal of High Energy Physics 2024-05-30

The differential acceleration between a rotating mechanical gyroscope and non-rotating one is directly measured by using double free-fall interferometer, no apparent has been observed at the relative level of 2x10{-6}. It means that equivalence principle still valid for extended bodies, i.e., spin-gravity interaction bodies not this level. Also, to limit our experimental sensitivity, there asymmetrical effect or anti-gravity gyroscopes as reported hayasaka et al.

10.1103/physrevd.65.042005 article EN Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields 2002-01-25

Context. The Sun is very quiet with less sunspots and activity since the beginning of solar cycle 24. However, active region (AR) 11 045 emerged on February 5, 2010, associated 43 (8 M- 35 C-class) flares, 53 coronal mass ejections (CMEs), 29 filament eruptions, 19 extreme ultraviolet (EUV) waves abundant jets, indicating that this AR first productive one

10.1051/0004-6361/201015796 article EN Astronomy and Astrophysics 2011-12-21

The solar oscillations along one coronal loop in AR 11504 are observed simultaneously white light emission and Doppler velocity by SDO/HMI, UV EUV emissions SDO/AIA. technique of the time–distance diagram is used to detect propagating intensities loop. We find that although all oscillation signals were intercorrelated, low chromospheric correlated more closely transition region corona than those photosphere. Situated above sunspot, periods ∼3 minutes UV/EUV emissions; however, moving away...

10.1088/0004-637x/762/1/42 article EN The Astrophysical Journal 2012-12-13

Branched-chain amino acids (BCAA), including leucine (Leu), isoleucine (Ile), and valine (Val), play key roles in protein metabolism. This study was conducted to investigate whether the dietary ratio of BCAA influences growth performance serum acid pool growing pigs. A total 40 crossbred pigs (Large White × Landrace; 9.85 ± 0.35 kg) were chosen fed one five isocaloric diets varying Leu:Ile:Val. The positive control diet contained 20% crude (CP) with a Leu:Ile:Val 1:0.51:0.63 according...

10.2527/jas.2015-9527 article EN Journal of Animal Science 2016-09-01

We study a correspondence between gravitational shockwave geometry and its fluid description near Rindler horizon in Minkowski spacetime. Utilizing the Petrov classification that describes algebraic symmetries for Lorentzian spaces, we establish an explicit mapping potential metric perturbation, where Einstein equation is equivalent to incompressibility condition of fluid, augmented by source. Then consider Ansatz stochastic quantum source which has physical interpretation shockwaves created...

10.1007/jhep05(2024)331 preprint EN arXiv (Cornell University) 2024-03-26

Abstract To probe the possibility of water sources on Mars and research surface environment Mars, a Martian spacecraft was designed in detail this study. Camera PIXL selected as payload. The service platform includes an orbit control system, communication thermal main computer, energy structure which to support operation complete required space missions. consequence furnishes some guidance for design spacecraft, discovers Mars.

10.1088/1742-6596/2764/1/012002 article EN Journal of Physics Conference Series 2024-05-01

We construct the phase space of a spherically symmetric causal diamond in $(d+2)$-dimensional Minkowski spacetime. Utilizing covariant formalism, we identify relevant degrees freedom that localize to $d$-dimensional bifurcate horizon and, upon canonical quantization, determine their commutators. On this space, find two Iyer-Wald charges. The first these charges, proportional area diamond, is responsible for shifting null time along and has been well-documented literature. second charge much...

10.48550/arxiv.2408.11094 preprint EN arXiv (Cornell University) 2024-08-20

We study the effects of geontropic vacuum fluctuations in quantum gravity on next-generation terrestrial gravitational wave detectors. If VZ effect proposed Ref. [1], as modeled Refs. [2, 3], appears upcoming GQuEST experiment, we show that it will be a large background for astrophysical searches observatories like Cosmic Explorer and Einstein Telescope.

10.48550/arxiv.2305.11224 preprint EN other-oa arXiv (Cornell University) 2023-01-01

Abstract There appear indications of more global activity on the Sun which is larger, much beyond scale solar active regions (ARs). These include formation, flaring and eruption trans-equatorial loops seen in EUV X-rays, formation filaments, magnetic connectivity dimming associated with halo-coronal mass ejections, wide spread radio burst sources meter wavelength corona, quasi-simultaneous flux emergence both hemispheres during some major events. With examples a few events last cycle we...

10.1017/s1743921309992705 article EN Proceedings of the International Astronomical Union 2009-08-01

In the present study, effect of replacing spray-dried plasma powder (SDPP) with yeast cell wall (YCW) in creep feed on intestinal inflammatory status piglets was evaluated. Five iso-nitrogenous and iso-caloric diets were supplied to piglets: 1) standard diet (BD), 2) 1% YCW+3% SDPP (LY), 3) 2% YCW+2% (MY), 4) 4% YCW (HY), 5) (ZY). The results showed that feeding LY had a better improving duodenal ileal villous height during suckling nursery periods compared ZY group (P < 0.05). Besides, (LY,...

10.2527/jas.2015-9608 article EN Journal of Animal Science 2016-09-01

Coded Aperture Imaging (CAI) plays a high performance in remote radiation measurement, an imaging method using high-energy with spectrum raging from × ray to γ has found many applications, including astronomy and environment monitoring. The kernel of CAI is the coded mask (encoding array) relevant decoding array which are usually designed jointly reconstruct perfect or near-perfect original image. In this paper, we've developed novel square-hole based system predicted have good properties...

10.1109/nssmic.2016.8069709 article EN 2016-10-01

We study quantum spacetime fluctuations near light-sheet horizons associated with a Rindler wedge in AdS spacetime, the context of AdS/CFT. In particular, we solve vacuum Einstein equation horizon, augmented Ansatz source smeared out Planckian width along one light-cone directions. Such source, whose physical interpretation is gravitational shockwaves created by energy fluctuations, alters to stochastic partial differential taking form Langevin equation. By integrating light sheet, find an...

10.48550/arxiv.2304.12349 preprint EN other-oa arXiv (Cornell University) 2023-01-01
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