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Science China Mathematics 2017年第6期60卷 1083-1088页

作者： OHSAWA takeo Graduate School of Mathematics Nagoya University Nagoya 464-8602 Japan

An extension theorem for holomorphic functions with L^2 growth condition is strengthened for the case of the extension from hypersurfaces with isolated singularities.

关键词： L^2 holomorphic hypersurface isolated singularity

Anticipation phenomenon in familial adenomatous polyposis:an analysis of its origin

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World Journal of Gastroenterology 2000年第3期6卷 335-338页

作者： takeo Iwama Joji Utsunomiya Department of Surgery Kyoundo HospitalSasaki Institute KandaSurugadai 1-8Chiyoda-KuTokyo 101-0062Japan Institute for Advanced Medical Sciences Hyogo Medical College Mukogawa 1-1NisinomiyaHyogo 663-8131Japan

AIM To analyze the origin of the anticipationphenomenon,which means earlier death insuccessive generation in familial *** The study subjects were 2161patients with familial adenomatous polyposisand their 7465 first-degree relatives who weremembers of 750 families registered at ourPolyposis *** ages at death andcumulative mortality rates in the parent,theproband,and the child generations werecompared for both all subjects and the *** In the patients over 5 years of age,the mean age at death was 50.9 years for theparent,42.3 years for the proband,and 33.3years for the child generations,respectively(P<0.001).The deceased rates in the threegenerations were 90.7%,51.3% and 23.1% ofthe patients,respectively,and this differencewas the main cause of the anticipation measuredby parent-child paring *** cumulativemortality rates for all subjects failed to showanticipation,however the cumulative mortalityrates for the patients showed the *** anticipation phenomenon was shown by anyparent-child pairing methods for the *** important causes of theanticipation were different proportion of causesof death between generations(P<0.001),and alow proportion of detected or deceased patients (P<0.001)in the child *** Anticipation in familialadenomatous polyposis may be caused byparent-child paring methods as well as severalintergenerational biases.

关键词： familial adenomatous apolyposis (FAP) anticipation phenomenon intergenerational bias child generations hereditary disorder mortality

CONTRIBUTION OF MACROSCOPIC DIMENSION EFFECT TO PIEZOELFCTRICITY IN POLYVINYLIDENE FLUORIDE

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Chinese Journal of Polymer Science 1987年第4期5卷 292-297页

作者：闻建勋,takeo FURUkAWA Shanghai Institute of Organic Chemistry Academia Sinica Shanghai The Institute of Physical and Chemical Research Japan

In this paper, we have studied the piezoelectricity in the poled uniaxially drawn polyvinylidene fluoride. The piezoelectric constants d31, d32, d33αand Young's moduli 1/s11 and 1/s22have been determined as a function of the remanent polarization Pr. The piezoelectric constants of the samples show a strong in-plane anisotropy. Such an anisotropy is mostly attributable to different Poisson's ratio. It is found that the piezoelectric activity mainly arises from macroscopic dimensional change.

关键词： Piezoelectricity Pyroelectricity Polyvinylidene fluoride.

STUDIES ON THE CHAIN STRUCTURAL EFFECT OF PVDF AND VDF (52)/TrFE(48) COPOLYMER BY MEANS OF THE METHOD OF DIELECTRIC RELAXATION

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Chinese Journal of Polymer Science 1994年第1期12卷 12-21页

作者：张兴元 FURUkAWA takeo Department of Materials Science and Engineering University of Science and Technology of China Hefei 230026 Department of Chemistry Science University of Tokyo Japan

Through improvements on a fully commercial and automatic system measuring frequency andtemperature spectra of the complex elastic, dielectric, and piezoelectric constants of polymerfilms, the precision for measuring complex dielectric constants achieved 2‰ from original 1%.The complex dielectric constants of PVDF, VDF （95 ）/VF （5）, VDF （52）/TrFE （48） and VDF（47. 5）/TrFE（47. 5）/HeFP （5） over a range of-120-140℃, 10-2-10;Hz were measured bythe described system. The diminution of chain regularity due to 5mol% vinyl fluoride in the chainof PVDF led to disappearing of α-relaxation and increase in T;（3℃） of VDF （95）/VF （5）.Because of the spatial impediment of 5mol% HeFP in copolymer chain, the Curie point of VDF（52）/TrFE（48） decreased by 30℃ and T;by 3℃. The behavior of dielectric relaxation indicatedthat 5mol% vinyl fluoride and HeFP made the relaxation strength of noncrystalline regionreduced, the activation energy of local relaxation increased and the relaxation time prolonged respectively.

关键词： Polyvinylidene fluoride VDF(52)/TrFE(48) Chain structure effect Dielectric relaxation

Future perspectives on cell therapy for autism spectrum disorder

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BIOCELL 2022年第4期46卷 873-879页

作者： MAkOTO NABETANI takeo MUkAI Department of Pediatrics Yodogawa Christian HospitalOsaka533-0024Japan Department of Cell Processing and Transfusion The Institute of Medical ScienceThe University of TokyoTokyo108-8639Japan

Autism spectrum disorder(ASD)is a complex neurodevelopmental condition characterized by impairments in social communication,abnormal to absent verbal communication,the presence of repetitive stereotypic verbal and nonverbal behaviors and restricted interests,with onset early in *** showed cognitive and behavioral characteristics of ASD by impairment of communication,cognition,perception,motor skills,executive function,theory of mind and emotion ***,pathogenesis of immune pathology in the brains of individuals with ASD has been *** therapeutic approaches in the viewpoints of immune modulation and microglial function are logical for novel treatments for individuals with *** therapies such as umbilical cord blood cells and mesenchymal stromal cells for ASD will be a challenging and encouraging field in the future clinical study with progress of biotechnological science.

关键词： Autism ASD Cell therapy Umbilical cord blood cells MSC Mesenchymal stromal cells

A two-step surface-based 3D deep learning pipeline for segmentation of intracranial aneurysms

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Computational Visual Media 2023年第1期9卷 57-69页

作者： Xi Yang Ding Xia Taichi kin takeo Igarashi The University of Tokyo 7 Chome-3-1 HongoBunkyo CityTokyo 113-8654Japan Jilin University No.2699Qianjin RoadChangchunChina

The exact shape of intracranial aneurysms is critical in medical diagnosis and surgical *** voxel-based deep learning frameworks have been proposed for this segmentation task,their performance remains *** this study,we offer a two-step surface-based deep learning pipeline that achieves significantly better *** proposed model takes a surface model of an entire set of principal brain arteries containing aneurysms as input and returns aneurysm surfaces as output.A user first generates a surface model by manually specifying multiple thresholds for time-of-flight magnetic resonance angiography *** system then samples small surface fragments from the entire set of brain arteries and classifies the surface fragments according to whether aneurysms are present using a point-based deep learning network(PointNet++).Finally,the system applies surface segmentation(SO-Net)to surface fragments containing *** conduct a direct comparison of the segmentation performance of our proposed surface-based framework and an existing voxel-based method by counting voxels:our framework achieves a much higher Dice similarity(72%)than the prior approach(46%).

关键词： intracranial aneurysm(IA)segmentation point-based 3D deep learning medical image segmentation

Recent trends from the results of clinical trials on gastric cancer surgery

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Cancer Communications 2019年第1期39卷 106-112页

作者： Takashi kiyokawa takeo Fukagawa Department of Surgery Teikyo University School of Medicine2-11-1 KagaItabashi-KuTokyo 173-8606Japan

The Japan Clinical Oncology Group has recently conducted large scale clinical trials with findings that have revealed pivotal strategies for the treatment of resectable gastric cancer *** findings include the fact that D3 lymphadenectomy does not improve survival rates when compared to D2 lymphadenectomy,and it is not recommended for resectable gastric ***,a transhiatal approach is recommended,instead of the left thoraco-abdominal approach,for the treatment of adenocarcinoma of the esophago-gastric junction or gastric cardia which has invaded≤3 cm of the *** with splenectomy and bursectomy had been recommended as a part of the D2 ***,the results of the recent clinical trials revealed that splenectomy should be avoided in total gastrectomy with D2 lymphadenectomy for proximal gastric cancer and that bursectomy should be avoided in gastrectomy with D2 lymphadenectomy for resectable gastric *** splenectomy and bursec-tomy were found to be unable to improve survival,but instead increased operative *** trials revealed that the above-mentioned invasive and aggressive procedures did not provide sufficient survival benefits and that gastric cancer surgery may be trending from an“invasive to less invasive”and“aggressive to more conservative”approach.

关键词： Gastric cancer Japanese Gastric Cancer Association Randomized clinical trials Para-aortic lymph nodes D2 lymphadenectomy D3 lymphadenectomy Left thoraco-abdominal approach Hiatal approach Splenectomy Bursectomy

Nanotopography Impact in Shallow Trench Isolation Chemical Mechanical Polishing-Dependence on Slurry Characteristics

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Journal of Rare Earths 2004年第z2期22卷 1-4页

作者： Jea-Gun Park.takeo katoh Ungyu Paik Nano-SOI Process Laboratory Hanyang University17 Haengdang-DongSeoungdong-GuSeoul 133-791Korea Nano-SOI Process LaboratoryHanyang University17 Haengdang-DongSeoungdong-GuSeoul 133-791Korea Department of Ceramic EngineeringHanyang University17 Haengdang-DongSeoungdong-GuSeoul 133-791Korea

The nanotopography of the surface of silicon wafers has become an important issue in ULSI device manufacturing since it affects the post-chemical mechanical polishing (post-CMP) uniformity of the thickness deviation of dielectric films. In this study, the nanotopography impact was investigated in terms of its dependence on the characteristics of ceriabased slurries, such as the abrasive size, the grain size of the polycrystalline abrasive and the surfactant added to the slurry. It was found that the magnitude of the post-CMP oxide thickness deviation due to nanotopography increased with the surfactant concentration in the case of smaller abrasives but was almost independent of the concentration in the case of larger abrasives. The grain size of the polycrystalline abrasive did not affect the nanotopography impact.

关键词： CMP slurry ceria abrasive surfactant nanotopography

First-principles computational study of highly stable and active ternary PtCuNi nanocatalyst for oxygen reduction reaction

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Nano Research 2015年第10期8卷 3394-3403页

作者： Seung Hyo Noh Byungchan Han takeo Ohsaka DepartmentofElectronicChemistry InterdisciplinaryGraduateSchoolofScienceandEngineeringTokyoInstituteofTechnology4259-G1-5NagatsutaMidori-kuYokohama226-8502Japan DepartmentofChemicalandBiomolecularEngineering YonseiUniversitySeoul120-749RepublicofKorea

Using density functional theory （DFT） calculations, we rationally designed metallic nanocatalysts with ternary transition metals for oxygen reduction reactions （ORRs） in fuel cell applications. We surrounded binary core-shell nanoparticles with a Pt skin layer. To overcome surface segregation of the core 3-d transition metal, we identified the binary alloy Cu0.76Ni0.24 as having strongly attractive atomic interactions by computationally screening 158 different alloy configurations using energy convex hull theory. The PtskinCu0.76Ni0.24 nanoparticle showed better electrochemical stability than pure Pt nanoparticles -3 nm in size. We propose that the underlying mechanism originates from favorable compressive strain on Pt for ORR catalysis and atomic interactions among the nanoparticle shells for electrochemical stability. Our results will contribute to accurate identification and innovative design of promising nanomaterials for renewable energy systems.

关键词： density functional theory ternary alloy nanoparticle durability stability alloy