1,680 research outputs found
Prospects for Very High Energy Blazar Survey by the Next Generation Cherenkov Telescopes
The prospects for future blazar surveys by next-generation very high energy
(VHE) gamma-ray telescopes, such as Advanced Gamma-ray Imaging System (AGIS)
and Cherenkov Telescope Array (CTA), are investigated using the latest model of
blazar luminosity function and its evolution which is in good agreement with
the flux and redshift distribution of observed blazars as well as the
extragalactic gamma-ray background. We extend and improve the template of
spectral energy distributions (SEDs) based on the blazar SED sequence paradigm,
to make it reliable also in the VHE bands (above 100 GeV) by comparing with the
existing VHE blazar data. Assuming the planned CTA sensitivities, a blind
survey using a total survey time of ~100 hrs could detect ~3 VHE blazars, with
larger expected numbers for wider/shallower surveys. We also discuss
following-up of Fermi blazars. Detectability of VHE blazars in the plane of
Fermi flux and redshift is presented, which would be useful for future survey
planning. Prospects and strategies are discussed to constrain the extragalactic
background light (EBL) by using the absorption feature of brightest blazar
spectra, as well as cut-offs in the redshift distribution. We will be able to
get useful constraints on EBL by VHE blazars at different redshifts ranging
0.3-1 TeV corresponding to z=0.10-0.36.Comment: 11 pages, 11 figures, accepted for publication in PAS
Xanthine Oxidase阻害剤Febuxostatは、gddYマウスモデルにおける抗炎症作用および抗線維効果を介してIgA腎症の進行を抑制する
広島大学(Hiroshima University)博士(医学)Doctor of Philosophy in Medical Sciencedoctora
Trust-aware Safe Control for Autonomous Navigation: Estimation of System-to-human Trust for Trust-adaptive Control Barrier Functions
A trust-aware safe control system for autonomous navigation in the presence
of humans, specifically pedestrians, is presented. The system combines model
predictive control (MPC) with control barrier functions (CBFs) and trust
estimation to ensure safe and reliable navigation in complex environments.
Pedestrian trust values are computed based on features, extracted from camera
sensor images, such as mutual eye contact and smartphone usage. These trust
values are integrated into the MPC controller's CBF constraints, allowing the
autonomous vehicle to make informed decisions considering pedestrian behavior.
Simulations conducted in the CARLA driving simulator demonstrate the
feasibility and effectiveness of the proposed system, showcasing more
conservative behaviour around inattentive pedestrians and vice versa. The
results highlight the practicality of the system in real-world applications,
providing a promising approach to enhance the safety and reliability of
autonomous navigation systems, especially self-driving vehicles
ChatMPC: Natural Language based MPC Personalization
We address the personalization of control systems, which is an attempt to
adjust inherent safety and other essential control performance based on each
user's personal preferences. A typical approach to personalization requires a
substantial amount of user feedback and data collection, which may result in a
burden on users. Moreover, it might be challenging to collect data in
real-time. To overcome this drawback, we propose a natural language-based
personalization, which places a comparatively lighter burden on users and
enables the personalization system to collect data in real-time. In particular,
we consider model predictive control (MPC) and introduce an approach that
updates the control specification using chat within the MPC framework, namely
ChatMPC. In the numerical experiment, we simulated an autonomous robot equipped
with ChatMPC. The result shows that the specification in robot control is
updated by providing natural language-based chats, which generate different
behaviors
自己免疫疾患の分子病態解明に向けた新規TNFR2アダプター分子アミノペプチダーゼP3の機能解析
広島大学(Hiroshima University)博士(薬学)Philosophy in Pharmaceutical Sciencedoctora
Factors leading to differences in water availability and photosynthetic activity of High Arctic lichens
第6回極域科学シンポジウム[OB] 極域生物圏11月16日(月) 国立極地研究所1階交流アトリウ
Search for sub-eV scalar and pseudoscalar resonances via four-wave mixing with a laser collider
The quasi-parallel photon-photon scattering by combining two-color laser
fields is an approach to produce resonant states of low-mass fields in
laboratory. In this system resonances can be probed via the four-wave mixing
process in the vacuum. A search for scalar and pseudoscalar fields was
performed by combining 9.3 J/0.9 ps Ti-Sapphire laser and 100 J/9 ns
Nd:YAG laser. No significant signal of four-wave mixing was observed. We
provide the upper limits on the coupling-mass relation for scalar and
pseudoscalar fields, respectively, at a 95\% confidence level in the mass
region below 0.15~eV.Comment: Accepted by Prog. Theor. Exp. Phy
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