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Finite element analysis of RC beam-column joints with high-strength materials
Noguchi, H.,Kashiwazaki, T. Techno-Press 1997 Structural Engineering and Mechanics, An Int'l Jou Vol.5 No.5
Reinforced concrete (RC) interior beam-column joints with high-strength materials: concrete compressive strength of 100 MPa and the yield strength of longitudinal bars of 685 MPa, were analyzed using three-dimensional (3-D) nonlinear finite element method (FEM). Specimen OKJ3 of joint shear failure type was a plane interior joint, and Specimen 12 of beam flexural failure type was a 3-D interior joint with transverse beams. Though the analytical initial stiffness was higher than experimental one, the analytical results gave a good agreement with the test results on the maximum story shear forces, the failure mode.
A simple screening current-induced magnetic field estimation method for REBCO pancake coils
Noguchi, So,Ueda, Hiroshi,Hahn, Seungyong,Ishiyama, Atsushi,Iwasa, Yukikazu IOP 2019 Superconductor science & technology Vol.32 No.4
<P>The development of NMR/MRI REBa<SUB>2</SUB>Cu<SUB>3</SUB>O<SUB> <I>y</I> </SUB> (REBCO, RE?=?rare earth) magnets is happening all over the world. It has been found that screening current-induced magnetic fields (SCMFs) are a serious problem for NMR/MRI magnets wound with REBCO tapes. The reduction of SCMFs is strongly desired, and the estimation of SCMFs is also desired at the design stage of REBCO magnets. In order to evaluate a SCMF, a finite element method (FEM) or a boundary integration method is needed thus far, and a high-level simulation technique is required. In this paper, we develop an easy method to estimate a SCMF without a high-level simulation technique. In this method, the inductance of a winding turn is calculated and then a screening current is estimated according to the magnetic field penetrating into the winding turn. The SCMF is obtained from the estimated screening current. The SCMFs computed by the proposed method were compared with measurements and simulation results of the FEM. The results agreed well, but we can see a large difference. However, the SCMFs found by the proposed method are accurate enough to know they are at the design stage without the use of a high-level simulation technique.</P>
Clinical characteristics of trigeminal neuralgia in a dental hospital
Noguchi, Tomoyasu,Shimamoto, Yoshinori,Fukuda, Ken-ichi The Korean Dental Society of Anesthsiology 2021 Journal of Dental Anesthesia and Pain Medicine Vol.21 No.5
Background: Neurovascular compression (NVC) is a well-known cause of trigeminal neuralgia (TN). However, patients with idiopathic TN (ITN) do not have evidence of NVC on magnetic resonance imaging (MRI), and other patients may remain asymptomatic despite evidence of NVC on MRI. This suggests that there may be additional risk factors for TN development other than NVC. Although epidemiological factors, such as age and sex differences, are useful for understanding the pathophysiology of TN, detailed statistics for each TN subtype are currently unavailable. Therefore, this study aimed to classify patients with TN into the following groups based on data extracted from past medical records: classical TN (CTN), secondary TN, and ITN. Methods: The characteristics of the groups and their differences were explored. Results: CTN was more common in women than in men, as previously reported, whereas ITN was more common in men than in women. The ratio of pain sites located on the right side of the face was high in all groups. Patients with CTN were also prone to NVC on the asymptomatic side. Conclusion: By investigating TN subtype, it may be possible to elucidate the pathophysiology of TN. This would greatly improve treatment outcomes.
Investigation of the Goals of Graduate Engineering Education
Noguchi, Hiroshi Korean Society for Engineering Education 2014 공학교육연구 Vol.17 No.4
Following the collaborator meetings report towards practical engineering education at universities(June 2010), the Pioneering University Reform Project supported by The Ministry of Education, Culture, Sports, Science and Technology(MEXT) of Japan solicited opinions from industry, professional associations, and academia on the goals of the individual fields, as well as common goals, that could be adaptable and applicable for a broad range of universities and curricula. This paper gives an overview of two surveys that were conducted, as well as a summary of the mechanical engineering goals as an example of the individual fields.
Noguchi, Takashi,Kim, D.Y.,Kwon, J.Y.,Park, Y.S. The Korean Infomation Display Society 2004 인포메이션 디스플레이 Vol.5 No.1
Poly-Si TFT(Thin Film Transistor) technology are reviewed and discussed. Poly-Si TFTs fabricated on glass using low-temperature process were studied extensively for the application to LCD (Liquid Crystal Display) as well as to OLED(Organic Light Emitting Diode) Display. Currently, one of the application targets of the poly-Si TFT is emphasized on the highly functional SOG(System on Glass). Improvement of device characteristics such as an enhancement of carrier mobility has been studied intensively by enlarging the grain size. Reduction of the voltage and shrinkage of the device size are the trend of AM FPD(Active Matrix Flat Panel Display) as well as of Si LSI, which will arise a peculiar issue of uniformity for the device performance. Some approaches such as nucleation control of the grain seed or lateral grain growth have been tried, so far.