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On the Linear Quadratic Regulator for Descriptor Systems
Tohru Katayama,Katsuki Minamino 대한전자공학회 1992 대한전자공학회 학술대회 Vol.1992 No.10
This paper deals with the linear quadratic optimal regulator problem for descriptor systems without performing a preliminary transformation for a descriptor system. We derive a generalized Riccati differential equation (GRDE) based on the two-point boundary value problem for a Hamiltonian equation. We then obtain an optimal feedback control and the optimal cost in terms of the solution of GRE. A simple example is included.
Cellular Senescence in Arterial Diseases
Ippei Shimizu,Tohru Minamino 한국지질동맥경화학회 2020 지질·동맥경화학회지 Vol.9 No.1
Cell-proliferation potency is limited, as cells cannot proceed through the cell cycle continually. Instead, they eventually show an irreversible arrest of proliferation, commonly referred to as cellular senescence. Following the initial discovery of this phenomenon by Hayflick et al., studies have indicated that cells are also destined to undergo aging. In addition to the irreversible termination of proliferation, senescent cells are characterized by a flattened and enlarged morphology. Senescent cells become pro-inflammatory and contribute to the initiation and maintenance of sustained chronic sterile inflammation. Aging is associated with the accumulation of senescent cells in the cardiovascular system, and in general these cells are considered to be pathogenic because they mediate vascular remodeling. Recently, genetic and pharmacological approaches have enabled researchers to eliminate senescent cells both in vitro and in vivo. The term “senolysis” is now used to refer to the depletion of senescent cells, and evidence indicates that senolysis contributes to the reversal of age-related pathogenic phenotypes without the risk of tumorigenesis. The concept of senolysis has opened new avenues in research on aging, and senolysis may be a promising therapeutic approach for combating age-related disorders, including arterial diseases.
Shimizu, Ippei,Minamino, Tohru,Toko, Haruhiro,Okada, Sho,Ikeda, Hiroyuki,Yasuda, Noritaka,Tateno, Kaoru,Moriya, Junji,Yokoyama, Masataka,Nojima, Aika,Koh, Gou Young,Akazawa, Hiroshi,Shiojima, Ichiro,K American Society for Clinical Investigation 2010 The Journal of clinical investigation Vol.120 No.5