A5058188864- Geotechnical Engineering and Soil Stabilization
- Semiconductor materials and devices
- Conducting polymers and applications
- Physics of Superconductivity and Magnetism
- Geotechnical Engineering and Underground Structures
- Landfill Environmental Impact Studies
- Geotechnical Engineering and Soil Mechanics
- Organic Electronics and Photovoltaics
- Ferroelectric and Piezoelectric Materials
- Plasma Diagnostics and Applications
- Grouting, Rheology, and Soil Mechanics
- Endometrial and Cervical Cancer Treatments
- Advanced Condensed Matter Physics
- Soil and Unsaturated Flow
- Analytical Chemistry and Sensors
- Magnetic and transport properties of perovskites and related materials
- Integrated Circuits and Semiconductor Failure Analysis
- Geotechnical Engineering and Analysis
- Cervical Cancer and HPV Research
- Ferroelectric and Negative Capacitance Devices
- Uterine Myomas and Treatments
- Advancements in Semiconductor Devices and Circuit Design
- Electronic and Structural Properties of Oxides
- Magnetic properties of thin films
- Copper Interconnects and Reliability
Toho University
2025
Toho University Omori Medical Center
2025
Keio University
2006-2024
International University of Health and Welfare
2024
Keio University Hospital
2021
Tokyo Medical Center
2011-2017
Saga University
1997-2014
Panasonic (Japan)
1997-2013
National Hospital Organization
2011
Philips (Belgium)
2005
Heterocyclic conducting polymer films are prepared by the oxidative cationic polymerization of thiophene, pyrrole and furan. Electrical optical properties these similar to those using electrochemically polythiophene, polypyrrole polyfuran.
The deformation characteristics of soil subjected to vacuum pressure are discussed and an approximate method is proposed for calculating settlement lateral displacement the ground induced by consolidation. Laboratory oedometer test results indicate that if alone larger than stress required maintain at-rest (no horizontal strain) condition, there will be inward induce generally less a surcharge load same magnitude. In case field consolidation, confining acting on element can regarded as...
Electron spin resonance (ESR), electrical conductivity and thermoelectric power are studied in electrochemically prepared doped polythiophene films. The ESR density increases by two orders of magnitude up to dopant concentration ca. 3 mol%, then decreases, while the drastically more than ten until this doping level, followed a rather mild increase. linewidth decreases sharply from 9 G 0.4 upon slight with shape change Gaussian Lorenzian. contribution Pauli-paramagnetism succeptibility...
A microbeam plasma was successfully generated by using an originally designed capacitively coupled rf reactor which composed of a needle cathode (1 mm φ), cylindrical anode (3 and quartz tubing inserted between the anode. When operated in open air helium steadily fed as discharge gas, beam (φ<2 mm) blew out into air. Conditions for generating stable were investigated. Preliminary results are presented on etching Si this plasma, well emission analysis plasma.
A method is proposed for determining the optimum penetration depth of prefabricated vertical drains (PVDs) in cases where vacuum consolidation combined with use PVDs a clayey deposit two-way drainage. The advantages combining pressure embankment loading are discussed terms reducing preloading-induced lateral displacement subsoil, increasing effective surcharge loading, and construction time case road construction. project conducted Saga, Japan, described, results from fully instrumented test...
Sputtered Ba1−xSrxTiO3 (BST) and SrTiO3 (STO) films capacitors made with these dielectrics have been characterized respect to physical electrical properties. Specific capacitance values included a high of 96 fF/μm2 for BST deposited 600 °C 26 STO at 400 °C. Leakage current densities 3.3 V the most part varied from mid 10−8 10−6 A/cm2. All are polycrystalline, although lowest temperature nearly amorphous layer which impacts their capacitance. Grain size increases deposition temperature,...
The electrical and physical properties of reactively sputtered HfO2 thin films on predeposited Hf metal layer were investigated. Compared with a conventional deposition process, i.e., direct Si substrate, the HfO2/Hf stacked capacitor exhibits excellent characteristics such as capacitance equivalent thickness (CET) 1.3 nm lower leakage current 2×10−5 (A/cm2) at −1 V gate bias. Based structural analysis well characteristics, interfacial is found to be controllable minimum CET higher...
Ferroelectric lead-zirconate-titanate (PZT) thin films were successfully fabricated by the multi-ion-beam sputtering technique in an oxygen ambient at a low substrate temperature of 415°C. By inserting lead-lanthanum-titanate (PLT) buffer layers between substrates and PZT films, perovskite-PZT could be epitaxially grown on (100)MgO, (100)Pt/MgO (111)Pt/Ti/SiO 2 /Si substrates. These even thickness values as 630 Å, showed excellent ferroelectric properties with remanent polarization 20 µC/cm...
The electrical and physical properties of thin hafnium oxide (HfO2) films fabricated by a remote plasma oxidation metal were investigated. HfO2 capacitors with TiN electrodes exhibited excellent characteristics such as equivalent thickness (EOT) 0.65 nm leakage current density 2.7 A/cm2 at the gate bias Vfb-1 (V). dependence EOT demonstrated that permittivity 19 for layer interfacial 0.36 nm. X-ray photoelectron spectroscopy study revealed oxygen radicals oxidize Hf selectively than Si...
Human papillomavirus (HPV) 18 is related not only to squamous cell carcinoma of the cervix, but also adenocarcinoma and small in which prognosis known be poor. Small interfering RNA (siRNA) that targets HPV18 E6 E7 was tested HPV18-positive lines investigate its effect mechanism action. Nude mice were a combination siRNA atelocollagen determine whether it might useful as new molecule-targeting therapy for cervical cancer. siRNAs targeting transfected into cancer cells vitro they investigated...
Antiferroelectric PbZrO3 thin films have been fabricated by a multi-ion-beam sputtering technique at substrate temperature as low 415 °C. Single crystal perovskite oriented along the axis could be epitaxially grown on (100)MgO, (100)Pt/MgO substrates using PbTiO3 buffer layer. The achieved high dielectric constants of about 400, which are almost 2.4 times larger than that bulk PbZrO3. measurements D–E hysteresis loops and Curie demonstrated antiferroelectric to ferroelectric phase transition...
The HfO2/Si(001) interfaces formed by reactive dc sputter deposition of Hf buffer layer followed HfO2 stacking were analyzed high-resolution transmission electron microscopy, medium energy ion scattering (MEIS), and photoelectron spectroscopy using synchrotron-radiation lights. present MEIS analysis determined the elemental depth profiles revealed that no resulted in growth SiO2 at interface, presence led to formation Si-rich silicate-like interlayers. binding shifts Si-2p3/2 identified...
Precursor lesions may be identified in fallopian tube tissue after risk-reducing salpingo-oophorectomy (RRSO) patients with pathogenic variants of BRCA1/2. Serous tubal intraepithelial carcinoma (STIC) is considered a precursor high-grade serous carcinoma, whereas the significance p53 signature remains unclear. In this study, we investigated relationship between and risk ovarian cancer.We analyzed clinicopathological findings conducted DNA sequencing for TP53 signatures STIC isolated using...
Dependences of electrical conductivity and ESR iodine-doped polythiophene films, (C 4 H 2 SI y ) x , on iodine concentrations which are precisely determined by a neutron activation technique (from dilute level ∼4×10 -4 to deep -1 reported. A drastic increase from 10 -8 -2 S/cm is observed at the fairly narrow dopant concentration region 2×10 3 < <5×10 -3 accompanied remarkable decrease in energy conductivity. At this transitional region, signal also changes significantly, showing maximum...
Objective: Laparoscopic surgery has been developed worldwide due to its minimal invasion as well noninferiority, compared with laparotomy. However, whether or not laparoscopic systematic para-aortic lymphadenectomy for endometrial cancer is feasible and advantages of various clinical factors, such a short hospital stay, less blood loss, faster recovery, open yet clarified. The aim this study was compare procedure laparotomy patients cancer. Study Design: This retrospective multicenter in...
Integration of the human papillomavirus (HPV) genome is thought to be one causes cancer progression. However, there controversy concerning physical status HPV 16 in premalignant cervical lesions, and have been no reports on concordance between detection integrated form HPV16 by real-time PCR situ hybridization. We investigated specimens intraepithelial neoplasia (CIN) invasive carcinomas for The presence was detected both hybridization zero four cases CIN1, three six CIN2, nine 27 CIN3, two...