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When Does the Equality J（X＊） = J（X） Hold for a Two-dimensional Banach Space X ？

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Acta Mathematica Sinica,English Series 2015年第8期31卷 1303-1314页

作者： Kichi-Suke saito Masahiro SATO Ryotaro TANAKA Department of Mathematics Faculty of Science Niigata University Department of Mathematical Sciences Graduate School of Science and TechnologyNiigata University

In this paper, we consider the following problem about the James constant： When does the equality J（X＊） = J（X） hold for a Banach space X ？ It is known that the James constant of a Banach space does not coincide with that of its dual space in general. In fact, we already have counterexamples of two-dimensional normed spaces that are equipped with either symmetric or absolute norms. However,we show that if the norm on a two-dimensional space X is both symmetric and absolute, then the equality J（X＊） = J（X） holds. This provides a global answer to the problem in the two-dimensional case.

关键词： James constant symmetric absolute norms piecewise linear functions

Adsorption of urea,creatinine,and uric acid from three solution types using spherical activated carbon and its recyclability

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Chinese Journal of Chemical Engineering 2020年第12期28卷 2993-3001页

作者： Tomohito Kameda Kazuya Horikoshi Shogo Kumagai Yuko saito Toshiaki Yoshioka Graduate School of Environmental Studies Tohoku University6-6-07 AobaAramakiAoba-kuSendai 980-8579Japan

In this paper,we propose that the urinary toxins from the wastewater be adsorbed on an adsorbent such as spherical activated carbon and the latter be regenerated by subjecting it to high temperatures to recycle activated carbon and also to recycle the water used in *** studied the adsorption of artificial waste dialysate,which is a mixed solution of urea,creatinine,and uric acid,and the separate solutions for each of these and found that their extents of adsorption onto the spherical activated carbon material were nearly *** amount of adsorption was approximately 1.4 mg·g^−1 for urea,18 mg·g^−1 for creatinine,and 20 mg·g^−1 for uric *** urea,creatinine,and uric acid adsorbed onto the spherical activated carbon decomposed on heat treatment at 500℃,and the adsorption capacity of the spherical activated carbon was *** study successfully demonstrated that the spherical activated carbon can be recycled in the waste dialysate treatment process.

关键词： Adsorption Dialysate Spherical activated carbon Recycling

Direct Simulation Methods for Scalar-Wave Envelopes in Two-Dimensional Layered Random Media Based on the Small-Angle Scattering Approximation

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Communications in Computational Physics 2008年第1期3卷 63-84页

作者： Tatsuhiko saito Haruo Sato Tsutomu Takahashi Earthquake Research Institute The University of TokyoYayoi 1-1-1Bunkyo-kuTokyo113-0032Japan. CREST Japan Science and Technology Agency(JST). Department of Geophysics Graduate School of ScienceTohoku UniversityAramaki-Aza-Aoba 6-3Aoba-kuSendaiMiyagi980-8578Japan. Institute for Research on Earth Evolution Japan Agency for Marine-Earth Science and TechnologyShowa-machi 3173-25Kanazawa-kuYokohamaKanagawa236-0001Japan.

This study presents stochastic methods to simulate wave envelopes in layeredrandom media. High-frequency Seismograms of small earthquakes are so complexdue to lithospheric inhomogeneity that seismologists often analyze wave envelopesrather than wave traces to quantify the subsurface inhomogeneity. Since thestatistical properties of the inhomogeneity vary regionally, it is important to developand examine direct envelope simulation methods for non-uniform random media. Asa simple example, this study supposes planewave propagation through two-layer randommedia in 2-D composed of weak and strong inhomogeneity zones. The characteristicspatial-scale of the inhomogeneity is supposed to be larger than the wavelength,where small-angle scattering around the forward direction dominates large-angle *** envelope simulation methods based on the small-angle scattering approximationare examined. One method is to solve a differential equation for the twofrequencymutual coherence function with the Markov approximation. The other isto solve the stochastic ray bending process by using the Monte Carlo method basedon the Markov approximation for the mutual coherence function. The resultant waveenvelopes of the two methods showed excellent coincidence both for uniform and fortwo-layer random media. Furthermore, we confirmed the validity of the two methodscomparing with the envelopes made from the finite difference simulations of *** two direct envelope simulation methods presented in this study can be a mathematicalbase for the study of high-frequency wave propagation through randomlyinhomogeneous lithosphere in seismology.

关键词： Seismic wave envelope random media.

FusionMLS:Highly dynamic 3D reconstruction with consumergrade RGB-D cameras

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Computational Visual Media 2018年第4期4卷 287-303页

作者： Siim Meerits Diego Thomas Vincent Nozick Hideo saito Department of Information and Computer Science Keio University Department of Advanced Information Technology Kyushu University LIGM UMR 8049Universit'e Paris-Est Marne-la-Vall'ee Japanese–French Laboratory for Informatics CNRS

Multi-view dynamic three-dimensional reconstruction has typically required the use of custom shutter-synchronized camera rigs in order to capture scenes containing rapid movements or complex topology changes. In this paper, we demonstrate that multiple unsynchronized low-cost RGB-D cameras can be used for the same purpose. To alleviate issues caused by unsynchronized shutters, we propose a novel depth frame interpolation technique that allows synchronized data capture from highly dynamic 3 D scenes. To manage the resulting huge number of input depth images, we also introduce an efficient moving least squares-based volumetric reconstruction method that generates triangle meshes of the scene. Our approach does not store the reconstruction volume in memory,making it memory-efficient and scalable to large *** implementation is completely GPU based and works in real time. The results shown herein, obtained with real data, demonstrate the effectiveness of our proposed method and its advantages compared to stateof-the-art approaches.

关键词： 3D reconstruction RGB-D cameras motion capture GPU

Effects of aggregating forests, establishing forest road networks, and mechanization on operational efficiency and costs in a mountainous region in Japan

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Journal of Forestry Research 2013年第4期24卷 747-754页

作者： Kazuhiro Aruga Gyo Hiyamizu Chikara Nakahata Masashi saito Department of Forest Science Faculty of AgricultureUtsunomiya University Frontier Agriscience and Technology Center Faculty of AgricultureShinshu University

We investigated forest road networks and forestry operations before and after mechanization on aggregated forestry operation sites. We developed equations to estimate densities of road networks with average slope angles, operational efficiency of bunching operations with road network density, and average forwarding distances with operation site areas. Subsequently, we analyzed the effects of aggregating forests, establishing forest road networks, and mechanization on operational efficiency and costs. Six ha proved to be an appropriate operation site area with minimum operation expenses. The operation site areas of the forest owners＇ cooperative in this region aggregated approximately 6 ha and the cooperative conducted forestry operations on aggregated sites. Therefore, 6 ha would be an appropriate operation site area in this region. Regarding road network density, higher-density road networks increased operational expenses due to the higher direct operational expenses of strip road establishment. Therefore, road network density should be reduced to approximately 200 m.

关键词： aggregating forests establishing forest road networks mechanization operational efficiency costs

Characteristic Tensor for Evaluation of Singular Stress Field Under Mixed-Mode Loadings

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Computer Modeling in Engineering & Sciences 2020年第2期122卷 415-432页

作者： Kei saito Tei Hirashima Ninshu Ma Hidekazu Murakawa JSOL Corporation 2-5-24 HarumiChuo-kuTokyo104-0053Japan. Osaka University 11-1 MihogaokaIbarakiOsaka567-0047Japan.

A characteristic tensor is defined using stress tensor averaged in a small circular domain at the crack tip and multiplied by the root of domain *** possesses the original stress tensor characteristics and has a simple relationship with conventional fracture-mechanics ***,it can be used to estimate stress intensity factors(SIFs)for cracks of arbitrary shape subjected to multiaxial stress loads.A characteristic tensor can also be used to estimate SIFs for kinked *** study examines the relation between a characteristic tensor and SIFs to demonstrate the correlation between the characteristic tensor and fracture-mechanics ***,a single straight crack and a kinked crack of finite length existing in a twodimensional,infinite isotropic elastic body in a plane stress state,were considered to investigate the properties of the characteristic tensor under mixed-mode *** demonstrate the practical utility of the characteristic tensor,the stress distribution obtained through finite element analysis(FEA)was used to estimate mixed-mode SIFs,and the values of estimated SIFs were compared with those obtained using an analytical *** demonstrate that SIFs estimated under mixed-mode loadings exhibit a good agreement with the analytical *** indicates that the proposed characteristictensor-based approach is effective in extracting features of singular stress fields at crack tips,and can be employed to estimate values of fracture-mechanics parameters,such as *** to its simplicity,the proposed approach can be easily incorporated in commercial FE codes for practical applications to simulate the crack-growth problem under both static and dynamic loading *** excellent applicability of the characteristic tensor greatly contributes to efficiency of the design process in industries.

关键词： Characteristic tensor stress-intensity factor mixed-mode loading kinked crack.

THIRD-ORDER DETERMINANT:***’S PROBLEM

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Acta Mathematica Scientia 1988年第1期8卷 29-34页

作者： Sadao saito Miyagi National College of Technology Natori-shi Miyagi Prefecture 981-12 Japan

We discuss a problem on the third-order determinant, paying attention to the number of zero in the nine elements of the determinant. Solutions of E. A. Molnar’s problem are also obtained as a result.

关键词： determinant integer satisfy arbitrary 吕加 realized

Risk prediction of common bile duct stone recurrence based on new common bile duct morphological subtypes

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World Journal of Gastrointestinal Surgery 2022年第8期14卷 874-876页

作者： Hirokazu saito Shuji Tada Department of Gastroenterology Kumamoto City HospitalKumamoto 862-8505Japan

Stones in the common bile duct(CBD) are reported worldwide, and this condition is majorly managed through endoscopic retrograde cholangiopancreatography(ERCP). CBD stone recurrence is an important issue after endoscopic stone removal. Therefore, it is essential to identify its risk factors to determine the necessity of regular follow-up in patients who underwent endoscopic removal of CBD stones. The authors identified that the S and polyline morphological subtypes of CBD were associated with increased stone recurrence. New morphological subtypes of CBD presented by the authors can be important risk predictors of recurrence after endoscopic stone removal. Furthermore, the new morphological subtypes of CBD may predict the risk of residual CBD stones or technical difficulty in CBD stone removal. Further studies with a large sample size and longer follow-up durations are warranted to examine the usefulness of the newly identified morphological subtypes of CBD in predicting the outcomes of ERCP for CBD stone removal.

关键词： Endoscopic retrograde cholangiopancreatography Common bile duct stone Stone removal Recurrence Common bile duct morphology Risk prediction

Hypernuclear Spectroscopy with Stable Heavy Ion Beams and Rare-isotope Beams:HypHI Project at GSI and FAIR

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原子核物理评论 2009年第S1期26卷 22-27页

作者： T.R. saito GSI Helmholtz Center for Heavy Ion Research

he international HypHI collaboration proposes to perform hypernuclear spectroscopy with stable heavy ion beams and rare isotope beams at GSI and FAIR in order to study neutron and proton rich hypernuclei and to measure directly hypernuclear magnetic moments for the first time. The project is divided into four phases. In the first Phase 0 experiment,the feasibility of precise hypernuclear spectroscopy with heavy ion beams will be demonstrated by observing π-decay channels of 3ΛH,4ΛH and 5ΛHe with 6Li projectiles at 2 AGeV impinging on a 12C target. In the later Phases 1 through 3,studies of proton and neutron rich hypernuclei,direct measurements of hypernuclear magnetic moments and the spectroscopy of hypernuclei toward the nucleon drip-lines are planned.

关键词： hypernuclear spectroscopy heavy ion collision rare-isotope beam