State-of-Arts Views on Response Control Technologies on Metal Space Structures

p. 277-288Recently various kinds of passive response control techniques are taken into practice for buildings in seismic areas, and they start affecting on the architectural design itself. These trend affects also on spatial structures, and application of such techniques to domes, truss structures, or tension structures are recently increasing. Folllowing previous descussions [1], this paper firstly present the recent varieties of architectural expressions using seismic response controll technologies in buildings. Then, several important progresses in the application of passive control technology for metal spatial structures are introduced by refering recently realized projects, followed by discussions on their response characteristics and easy response evaluation methods.Takeuchi, T.; Ogawa, T.; Kumagai, T. (2009). State-of-Arts Views on Response Control Technologies on Metal Space Structures. Editorial Universitat Politècnica de València. http://hdl.handle.net/10251/650

Effective Resistance of the HTS Floating Coil of the Mini-RT Project

A magnetically levitated superconducting coil device, Mini-RT, has been constructed using high temperature superconductors for the purpose of examining a new magnetic confinement scheme of high-beta plasmas. The floating coil is wound with Bi-2223/Ag tapes, and it is operated in the temperature range of 20-40 K. The excitation tests of the coil were carried out and persistent current was sustained for magnetic levitation. The decay time constant of the persistent current was measured and the effective resistance of the coil cables was evaluated. The obtained resistance shows a considerable increase than that predicted by the n-value model. This might be caused by some electromagnetic effects such as the loss generation with long-lived shielding currents. This consideration was examined by measuring the magnetization of an HTS sample coil

Dynamic responses of cyclindrical lattice shell roofs under horizontal earthquake motions with arbitrary direction by shaking table test

p. 409-419This paper is intended as an investigation of the seismic response behavior of cylindrical lattice shell structures by shaking table tests. The seismic vibration tests are carried out using small scale models with shell span of 60 cm of cylindrical lattice shell roofs with substructure under horizontal motions in arbitrary direction. From the experimental results, the effects of difference of earthquake input direction and relationship between mechanical properties of roofs and substructures on response behavior of shell roofs are made clear. In addition, it is confirmed that the seismic response evaluation methods proposed in previous papers (Takeuchi et al. [1] ~ Takeuchi et al. [3]) apply to the responses subjected to earthquake motions with arbitrary direction.Kumagai, T.; Takeuchi, T.; Susuki, I.; Ogawa, T. (2009). Dynamic responses of cyclindrical lattice shell roofs under horizontal earthquake motions with arbitrary direction by shaking table test. Editorial Universitat Politècnica de València. http://hdl.handle.net/10251/653

Response Evaluation of Seismically Isolated Lattice Domes using Amplification Factors

p. 355-365Seismic responses of raised lattice domes with substructures are known to be very complicated, and it is known that not only horizontal response but also vertical response is excited under horizontal seismic input. Such action causes damage on structures and nonstructural elements such as ceiling and suspended lightning equipments. A seismic isolation system is known to be effective to reduce such responses. In this paper, simple response evaluation methods for lattice domes supported by substructures with seismic isolation bearings are proposed using response amplification factors and linearization techniques with the same concept proposed by authors. Their validities are discussed against the results of time history analyses.Takamatsu, K.; Takeuchi, T.; Kumagai, T.; Ogawa, T. (2009). Response Evaluation of Seismically Isolated Lattice Domes using Amplification Factors. Editorial Universitat Politècnica de València. http://hdl.handle.net/10251/652

Cor Triatriatum in the Adult with Aortic Stenosis and Mitral Stenosis

Background：Cor triatriatum is a rare congenital cardiac anomaly, in which the left atrium or right atrium is separated by an abnormal fibromuscular membrane with one or more restrictive orifices. This condition typically presents in infancy or early childhood and can be associated with other cardiac anomalies.Case presentation：A 75-year-old woman was admitted for exertional dyspnea with moderate aortic and mitral stenosis. As cor triatriatum was revealed by a computed tomography and echocardiography, she was referred to our department for surgery. Aortic valve replacement, mitral valve replacement and excision of the membranous septum in the left atrium was performed. This report presents an incidental findings of cor triatriatum with aortic stenosis, moderate mitral stenosis in septuagenarian.Conclusion：We encountered a rare case of cor triatriatum with aortic stenosis and mitral stenosis in septuagenarian. She was incidentally diagnosed by rheumatic aortic and mitral stenosis which had advanced to moderate level

Human metaphase chromosome consists of randomly arranged chromatin fibres with up to 30-nm diameter

Wako, T., Yoshida, A., Kato, J. et al. Human metaphase chromosome consists of randomly arranged chromatin fibres with up to 30-nm diameter. Sci Rep 10, 8948 (2020). https://doi.org/10.1038/s41598-020-65842-z

Tespa1 is a novel inositol 1,4,5-trisphosphate receptor binding protein in T and B lymphocytes

AbstractTespa1 has been recently reported to be a critical molecule in T-cell development, however, the precise molecular mechanisms of Tespa1 remain elusive. Here, we demonstrate that Tespa1 shows amino-acid sequence homology to KRAS-induced actin-interacting protein (KRAP), an inositol 1,4,5-trisphosphate receptor (IP3R) binding protein, and that Tespa1 physically associates with IP3R in T and B lymphocytes. Two-consecutive phenylalanine residues (Phe185/Phe186) in Tespa1, which are conserved between Tespa1 and KRAP, are indispensable for the association between Tespa1 and IP3R. These findings suggest that Tespa1 plays critical roles in the immune system through the regulation of the IP3R

Engineering research and development of magnetically levitated high-temperature superconducting coil system for mini-RT project

A magnetically levitated superconducting coil system is being developed using high temperature superconductors for examining a new magnetic confinement of high-beta plasmas. A miniature double-pancake coil was fabricated with a Bi-2223 Ag-sheathed tape for the purpose of developing a floating control using laser displacement gauges. The coil was inductively excited with liquid nitrogen cooling and successfully levitated in the air. A persistent current switch is also being developed with a Bi-2223 Ag-0.3wt%Mn-sheathed tape, and a prototype model was successfully tested