Aichi University of Education (愛知教育大学, Aichi kyōiku daigaku) is a national university at Kariya, Aichi, Japan.The history of the university dates back to 1873 when it was called Aichi Prefectural Training Institution. In 1949, the university had become known as the Aichi University of Arts and Science and by 1966 it got a title of what it is called today, Aichi University of Education. In 2004, the title got changed again, this time to the National University Corporation Aichi University of Education.The school offers four education programs for undergraduate studies, as well as post graduate programs in the Graduate School of Educaction and Graduate School of Practitioners of Education.In 2016, the university signed an exchange agreement with the Jogjakarta State University.
The gravitational form factors (GFFs) of the baryon octet, including hyperons, are investigated in a bottom-up holographic QCD model that explicitly incorporates the SU(3) flavor symmetry breaking through the strange quark mass. We fit the model parameters to reproduce the empirical masses of the baryon octet and examine the dependence of GFFs on the probe momentum. Our numerical results show distinct differences in the GFFs across the baryon octet. The computed GFFs are found to be in reasonable agreement with available lattice QCD results for the non-strange/nucleon sector. We also calculate the gravitational radii of the baryon octet and find that they decrease with increasing strangeness, indicating that heavier hyperons are more compact.
We define a two-particle quantum walk of identical particles on a graph G via the one-particle Grover walk on the Kronecker product G ⊗ G, and call it the two-particle Grover walk. In systems of identical particles, quantum mechanics requires that quantum states have a certain invariance with respect to the exchange of particles. Focusing on the symmetry of the Kronecker product G ⊗ G as a graph, we show that the time evolution operator of this walk commutes with the swap operator, which ensures that this requirement is satisfied. Furthermore, we study the entanglement entropy of quantum states evolved by this walk. For the complete bipartite graph K_n,n, we completely determine the values of n for which the quantum states evolved from specific initial states attain the upper bound of the entropy at some time, and prove that they are exactly 1 and 2.
This paper investigates the existence of m-stiff configurations in the unit sphere Sd-1, which are spherical (2m - 1)-designs that lie on m parallel hyperplanes. We establish two non-existence results: (1) for each fixed integer m > 5, there exists no m-stiff configuration in Sd-1 for sufficiently large d; (2) for each fixed integer d > 10, there exists no m-stiff configuration in Sd-1 for sufficiently large m. Furthermore, we provide a complete classification of the dimensions where m-stiff configurations exist for m = 2,3,4,5. We also determine the non-existence (and the existence) of m-stiff configurations in Sd-1 for small d(3 <= d <= 120) with arbitrary m, and also for small m(6 <= m <= 10) with arbitrary d. Finally, we conjecture that there is no m-stiff configuration in Sd-1 for (d, m) with d >= 3 and m >= 6. (c) 2025 Elsevier B.V. All rights are reserved, including those for text and data mining, AI training, and similar technologies.
We investigate the gravitational form factors (GFFs) of the kaon in a proper-time-regularized three-flavor Nambu–Jona-Lasinio model. We treat the kaon as a light–strange pseudoscalar bound state and evaluate its energy–momentum-tensor matrix element using a dressed quark–graviton vertex. By retaining the interaction-induced contact contribution alongside the quark triangle diagrams, we preserve the gravitational Ward–Takahashi identity and ensure the conservation of the total energy–momentum tensor. We determine the light- and strange-quark contributions to the kaon GFFs, contrast them with the corresponding pion results, and extract the associated pressure and shear-force distributions, together with the Breit-frame and transverse light-front mass radii. Explicit flavor-symmetry breaking dictates that the strange sector carries a larger share of the kaon momentum and mechanical response. Consequently, compared to the pion, the kaon exhibits a less negative D-term and more compact mechanical distributions, featuring enhanced central pressure and shear. We further show that a Ward–Takahashi-identity-preserving reduction of the C-term projection is essential for maintaining the pion low-energy theorem in proper-time regularization.
Abstract This study visualizes long-term shifts in interregional trade between Ishikawa Prefecture in the Hokuriku region and Aichi Prefecture in the Tokai region, focusing on their trade relationships with other prefectures in the Chubu region. Using the hypothetical regional extraction method and multiregional input–output tables for five time points (1995, 2000, 2005, 2011, and 2015), the economic effects of hypothetically removing these prefectures from the regional production network were analyzed. The analysis revealed that interregional trade within the Chubu region expanded in both prefectures after 2011 despite a substantial decline in production owing to the Great East Japan Earthquake. By 2015, production levels had recovered to approximately the same level as in 2005, and the trend of increasing interregional trade continued. Thus, the expansion in interregional trade observed after 2011 was not temporary; both Ishikawa and Aichi prefectures have since strengthened their trade relationships with other prefectures in the Chubu region. Positioning the Great East Japan Earthquake within the international literature on disaster propagation through production networks, this paper provides a comparable, multi-period indicator of interregional embeddedness and its persistence after large shocks. It also highlights the importance of resilient interregional trade networks in mitigating future disruptions, offering policy-relevant insights.
