Bubble Formation at Single Circular Hole

In this report the formation of bubbles at a single circular hole is considered theoretically, as a fundamental study on contacting devices for the purpose of mass transfer operation in chemical engineering. From many previous experimental data, it is found that the mechanism of bubble formation is classified into steady bubble growth system and potential bubble formation system

Splitting expands the application range of Vision Transformer -- variable Vision Transformer (vViT)

Vision Transformer (ViT) has achieved outstanding results in computer vision. Although there are many Transformer-based architectures derived from the original ViT, the dimension of patches are often the same with each other. This disadvantage leads to a limited application range in the medical field because in the medical field, datasets whose dimension is different from each other; e.g. medical image, patients' personal information, laboratory test and so on. To overcome this limitation, we develop a new derived type of ViT termed variable Vision Transformer (vViT). The aim of this study is to introduce vViT and to apply vViT to radiomics using T1 weighted magnetic resonance image (MRI) of glioma. In the prediction of 365 days of survival among glioma patients using radiomics,vViT achieved 0.83, 0.82, 0.81, and 0.76 in sensitivity, specificity, accuracy, and AUC-ROC, respectively. vViT has the potential to handle different types of medical information at once.Comment: 11 pages, 3 figures, 2 Table

Higgs response and pair condensation energy in superfluid nuclei

The pairing correlation in nuclei causes a characteristic excitation, known as the pair vibration, which is populated by the pair transfer reactions. Here we introduce a new method of characterizing the pair vibration by employing an analogy to the Higgs mode, which emerges in infinite superconducting/superfluid systems as a collective vibrational mode associated with the amplitude oscillation of the Cooper pair condensate. The idea is formulated by defining a pair-transfer probe, the Higgs operator, and then describing the linear response and the strength function to this probe. We will show that the pair condensation energy in nuclei can be extracted with use of the strength sum and the static polarizability of the Higgs response. In order to demonstrate and validate the method, we perform for Sn isotopes numerical analysis based the quasi-particle random phase approximation to the Skyrme-Hartree-Fock-Bogoliubov model. We discuss a possibility to apply this new scheme to pair transfer experiment.Comment: 31 pages, 9 figure

Reduced Representation of Spatial Harmonics for Motor Model Order Reduction Using Block Arnoldi Method

A motor model order reduction (MOR) based on the decomposition into stator and rotor domains requires a Fourier expansion of the gap field with a large of number harmonic components, which are handled by the multiport Cauer ladder network (CLN) method. This study proposes a block Arnoldi method to obtain a reduced representation of spatial harmonics. Efficient bases for reduced harmonic representation were generated based on the inductance matrices of CLNs of stator and rotor domains. The interaction between the stator and rotor domains was considered by exchanging the basis vectors. Simulation results show that the proposed method yields an efficient and accurate MOR of the induction motor

グルコース飢餓による一次繊毛形成機構

Tohoku University水野健作課

Clinical significance of β2-adrenergic receptor expression in patients with surgically resected gastric adenocarcinoma

学位記番号：医博甲1587

Model Order Reduction of Cage Induction Motor With Skewed Rotor Slots Using Multiport Cauer Ladder Network Method

A method for efficiently deriving a reduced-order model of a cage induction motor (IM) with skewed rotor slots is proposed based on the multiport Cauer ladder network (CLN) method. This article presents several formulations of the multiport CLN method for the skewed rotor, in which the continuity of the bar currents and the space harmonics included in the air-gap flux density waveform are treated differently. The effectiveness of the developed methods was verified from the viewpoints of computational accuracy and cost through application to a practical cage IM with skewed rotor slots

Cauer Ladder Network with Constant Basis Functions for Eddy Current Problems Involving Conductor Movement

This article proposes a Cauer ladder network with constant basis functions for eddy current problems involving translational movements. The analysis domain is decomposed into two domains: the stator part and the mover part. The Cauer ladder network method is applied to each domain to derive circuit parameters and corresponding basis functions to reconstruct the eddy current and compute the Lorentz force. Interactions between the two domains are modeled by current-controlled voltage sources connected to each stage of the Cauer ladder network. The gains of the current-controlled voltage sources are computed by numerical integration of the vector potential induced by the coil. An analysis of the TEAM Workshop Problem 28 was performed, and the results were validated by comparing them with those obtained by the commercially available software and showed a significant reduction in computational time