Zobrazeno 1 - 10
of 77
pro vyhledávání: '"Seiya Nishiyama"'
Autor:
Yusuke Iizuka, Koichi Yoshinaga, Shizuka Amitani, Seiya Nishiyama, Kentaro Fukano, Keika Miyazawa, Asuka Kitajima, Ikumi Sawada, Yuji Otsuka, Masamitsu Sanui
Publikováno v:
BMC Anesthesiology, Vol 24, Iss 1, Pp 1-14 (2024)
Abstract Background Tracking preload dependency non-invasively to maintain adequate tissue perfusion in the perioperative period can be challenging.The effect of phenylephrine on stroke volume is dependent upon preload. Changes in stroke volume induc
Externí odkaz:
https://doaj.org/article/7f5638c7df7748ddb27259b068e2f2b8
Autor:
Seiya Nishiyama, Shigehiko Uchino, Yusuke Sasabuchi, Tomoyuki Masuyama, Alan Kawarai Lefor, Masamitsu Sanui
Publikováno v:
PLoS ONE, Vol 19, Iss 1 (2024)
Externí odkaz:
https://doaj.org/article/467c7577427549b0a74f2d888cd8219e
Publikováno v:
Symmetry, Integrability and Geometry: Methods and Applications, Vol 5, p 009 (2009)
The maximally-decoupled method has been considered as a theory to apply an basic idea of an integrability condition to certain multiple parametrized symmetries. The method is regarded as a mathematical tool to describe a symmetry of a collective subm
Externí odkaz:
https://doaj.org/article/3df893f4d63b48ee93d1092e57b0d5b2
The relevance in Physics of non-Hermitian operators with real eigenvalues is being widely recognized not only in quantum mechanics but also in other areas, such as quantum optics, quantum fluid dynamics and quantum field theory. %stochastic processes
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b42a89622c44d151d96fdec20e2af670
http://arxiv.org/abs/2004.07205
http://arxiv.org/abs/2004.07205
Autor:
Hitomi Ajimizu, Yasuyuki Hayashi, Michiko Tsuchiya, Yosuke Nakanishi, Chikara Sakaguchi, Haruka Toyonaga, Yukio Nagasaka, Noboru Morikawa, Hiroshi Yasui, Seiya Nishiyama
Publikováno v:
Internal Medicine
Pulmonary tumor thrombotic microangiopathy (PTTM) is a high-mortality disease that is difficult to diagnose clinically. Our patient was an 80-year-old woman who came to us due to symptoms of increasing dyspnea. A clinical evaluation showed that she h
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b9353eae1cfd7033e993fc5971ccf477
http://europepmc.org/articles/PMC5313427
http://europepmc.org/articles/PMC5313427
This paper deals with the mathematical spectral analysis and physical interpretation of a fermionic system described by a non-Hermitian Hamiltonian possessing real eigenvalues. A statistical thermodynamical description of such a system is considered.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2ad61e563a34610afac0103677a67896
http://arxiv.org/abs/1907.09347
http://arxiv.org/abs/1907.09347
Autor:
João da Providência, Seiya Nishiyama
Toward a unified algebraic theory for mean-field Hamiltonian (MFH) describing paired- and unpaired-mode effects, in this paper, we propose a generalized HB (GHB) MFH in terms of the SO(2N+1)Lie algebra of fermion pair and creation-annihilation operat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2642b1cebb6c5b54fd8c418d9f8f4515
Autor:
João da Providência, Seiya Nishiyama
Publikováno v:
Nuclear Physics A. 935:1-17
Four decades ago, Tomonaga proposed the elementary theory of quantum mechanical collective motion of two-dimensional nuclei of N nucleons. The theory is based essentially on the neglect of 1/sqrtN against unity. Very recently we have given exact cano
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9c8fc8d97f85bb8f5780bf717bf3defe
https://doi.org/10.1016/j.nuclphysa.2014.12.005
https://doi.org/10.1016/j.nuclphysa.2014.12.005
Autor:
Seiya Nishiyama, João da Providência
Publikováno v:
Journal of Mathematical Physics. 60:081706
In this paper, we give an expression for canonical transformation group with Grassmann variables, basing on the Jacobi hsp ≔ semidirect sum hN⋊sp(2N,R)C algebra of boson operators. We assume a mean-field Hamiltonian (MFH) linear in the Jacobi gen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3e09be2ac7ec8b06477819a615cc0e4e
https://doi.org/10.1063/1.5109944
https://doi.org/10.1063/1.5109944
Autor:
Joao da Providencia, Seiya Nishiyama
In the preceeding paper, introducing isospin-dependent density operators and defining exact momenta (collective variables), we could get an exact canonically momenta approach to a one-dimensional (1D) neutron-proton (NP) system. In this paper, we att
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::60729a085b3853c7a255c40e82e3a769
http://arxiv.org/abs/1603.07420
http://arxiv.org/abs/1603.07420