A5077156821- Blind Source Separation Techniques
- Analog and Mixed-Signal Circuit Design
- Engineering Applied Research
- Speech and Audio Processing
- Aerodynamics and Fluid Dynamics Research
- Low-power high-performance VLSI design
- Aerodynamics and Acoustics in Jet Flows
- Spectroscopy and Chemometric Analyses
- Advanced Algorithms and Applications
- Advanced Adaptive Filtering Techniques
- Image and Signal Denoising Methods
- Acoustic Wave Resonator Technologies
- Advanced Measurement and Detection Methods
- Structural Health Monitoring Techniques
- Neural Networks and Applications
- Optical measurement and interference techniques
- Magnetic properties of thin films
- Advanced machining processes and optimization
- Fluid Dynamics and Vibration Analysis
- Advanced Memory and Neural Computing
- Acoustic Wave Phenomena Research
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Ultrasonics and Acoustic Wave Propagation
- Advancements in Semiconductor Devices and Circuit Design
The University of Tokyo
2019-2025
Nagoya Municipal Industrial Research Institute
2007-2024
Muroran Institute of Technology
2015-2024
Maebashi Institute of Technology
2013-2024
Kyoto University Institute for Chemical Research
2024
Kyoto University
2024
Instituto de Investigaciones Químicas
2024
Ehime University
2016-2023
Osaka University
2011-2022
Osaka Research Institute of Industrial Science and Technology
2021-2022
An analog-to-digital converter is developed based on the charge-balancing principle. It consists of a switched-capacitor integrator, comparator, and digital logic circuit. Driven by two phase clock, integrator accumulates consecutively incremental signal charge while extracting quantized reference from accumulated each time its output becomes positive, to keep their balance. The ratio between extracted frequencies for given period then provides representation an input analog signal. A...
Abstract We have studied the transmission of surface acoustic waves (SAWs) in ferromagnetic/non-magnetic/ferromagnetic tryilayers. The SAW scattering matrix is for devices with various non-magnetic spacer thickness, which defines strength interlayer exchange coupling. find amplitude depends on its propagation direction when two ferromagnetic layers are coupled antiferromagnetically. degree such nonreciprocity increases increasing coupling and reaches 37 dB mm −1 a device thinnest layer....
[64Cu]Cu-ATSM is a radiotherapeutics under clinical trials. It necessary to take appropriate measures limit its exposure and ensures airborne concentrations do not exceed legally permitted levels. Therefore, the purpose of this study was measure radioactivity concentration in inpatient room after administering patients. Three patients with malignant glioma were intravenously administered (100 MBq/kg ± 10%) an room, measured at two locations (in center near entrance room) using filter...
Previously, we conducted the phase I study of 64Cu-ATSM, which is Cu-diacetyl-bis (N4-methylthiosemicarbazone) radiolabeled with Cu-64, for patients brain tumors and determined maximum tolerated dose. We started a subsequent multicenter, randomized, open-label III to evaluate efficacy 64Cu-ATSM as an investigator-initiated registration-directed trial recurrent or residual malignant glioma (protocol No. NCCH2301, STEP-64). Patients will be randomized either control arm (64Cu-ATSM). A...
We succeeded in fabricating a CoFeB/MgO-based magnetic tunnel junction (MTJ) directly on an organic flexible substrate. The MTJ shows good strain endurance while keeping the magnetoresistance (TMR) ratio of ∼100% under various strained conditions; TMR is almost unchanged up to tensile 1.2%. Because magnetoelastic effect, anisotropy fields for top and bottom CoFeB layers are linearly proportional with same rate as that single film, suggesting expected added both pillar from stretched
We have demonstrated that the strain direction can be detected sensitively using an exchange-biased spin valve (SV) formed on a flexible substrate. The giant magnetoresistive SV used here contains strain-sensitive Co free layer and strain-insensitive NiFe pinned layer. exchange bias is imparted from antiferromagnetic FeMn stacked When applied in deviating field, magnetization rotates along this directly only, resulting resistance change. Compared to previously reported pseudo SV, present...
We used a surface acoustic wave (SAW) cavity resonator to study the coupling of magnons in synthetic antiferromagnet (SAF) and phonons carried by SAWs. The SAF is composed CoFeB/Ru/CoFeB trilayer, scattering matrix SAW studied assess coupling. find that spectral line width modulated when frequency excited approaches resonance frequency. Such change linewidth can be well reproduced using macrospin-like model calculations. From analyses, we estimate magnon–phonon strength ∼9.9 MHz at 1.8 GHz:...
An acenaphthylene-fused cyclo[10]pyrrole 1b was selectively synthesized via an oxidative coupling reaction of the corresponding 2,2'-bipyrrole with appropriate dianion template, croconate anion. The structure as isolated largest cyclo[n]pyrrole elucidated by X-ray crystallographic analysis. absorption spectrum exhibited a markedly red-shifted, intensified L band at 1982 nm, which interpreted application Michl's perimeter and Gouterman's 4-orbital models, supported magnetic circular dichroism...
In this study we investigated differences in the characteristics determining suitability of five types ion (Fe(3+), Al(3+), Ca(2+), Ba(2+) and Sr(2+))-cross-linked alginate films as culture substrates for cells. Human dermal fibroblasts were cultured on each film to examine cell affinity alginates. Since behavior surface a material is dependent proteins adsorbed it, protein adsorption ability features (wettability, morphology charge) related abilities films. We observed that ferric, aluminum...
We have demonstrated a reversible control of magnetic anisotropy in Pt/Co and Pd/Co structures formed on polyethylene naphthalate flexible substrate by stretching the biaxially. Compared with case uniaxial tensile strain, which has been previously studied, in-plane biaxial strain produces much larger compressive normal to plane, resulting significant modulation perpendicular anisotropy. found easy axis switching from out-of-plane applying up 2% strain. In-plane induced is also investigated.
A novel circuit technique is presented to prevent op-amps in switched-capacitor circuits from generating 'spikes' the nonoverlapping period of clock phases. This universal that it applicable offset-compensated, parasiticand gain-insensitive amplifiers, integrators and sample/hold circuits. Experimental waveforms are also given demonstrate its validity.
Novel switched-capacitor circuits for algorithmic digital-to-analog conversion are described. The process is insensitive both to the offset voltages of op-amps and parasitic capacitances. capacitance mismatch errors also minimized because only a small number unit capacitors used. An error analysis presented that shows an accuracy greater than 10-bits can be obtained using present MOS technologies. Besides being very accurate, new converters possess important feature integrable minimal amount...
2052 Background: Malignant brain tumors such as glioblastoma have poor prognosis. Current standard therapies surgery, radiotherapy, and chemotherapy were frequently insufficient. Hypoxic tissue microenvironments induced by rapid cellular growth within tumor lesions lead to treatment resistance. Methods: Eligible patients had a histological diagnosis of grade III/IV glioma, primary central nervous system malignant lymphoma (PCNSL), or II/III meningioma based on the most recent pathological...
A test methodology that reveals safety-margin problems is presented. The allows diagnosis without additional hardware. To the safety margin, correction logic inhibited. coding of first and second stages actually remains same, but stage output never decremented before two outputs are combined to form overall ADC (analog-to-digital converter) code. This means over a portion second-stage range, code will be too high. An example how first-stage flash error interpreted shown. Here margin reduced...
We propose vector quantization (VQ) with variable block size for color image compression. Variable VQ has so far been implemented using quad-tree decomposition. This method focus on homogeneity of local regions an image. consider the complex to be more essential than homogeneous because may have a wealth information. based fractal dimensions (LFDs) and compressed Encoded images obtained by proposed were evaluated both compression rate quality. Results computational experiments show that is...
Abstract We studied helicity-resolved Raman scattering in PtSe 2 flakes with different thicknesses. The peak amplitude of helicity-switched is significantly larger than that helicity-conserved for the in-plane E g mode, consistent tensor analyses and conservation law angular momentum. mode thinner flakes. In addition, we find peaks near energy levels IR-active u A modes, only monolayer a few-layers-thick Interestingly, these manifest themselves scattering; they are nearly absent scattering.
A novel MOS triangle-to-sine wave convertor (TSC) is proposed. The circuit based on the exponential characteristics of devices operated in subthreshold region. with a total harmonic distortion 0.21% and bandwidth 100 kHz has been demonstrated by PSPICE simulation experiments.
Cyclo[9]pyrrole, a ring-expanded porphyrin without meso-bridges and having an odd number of pyrroles, was synthesized via the oxidative coupling 2,2′:5′,2″-terpyrrole. X-ray crystallography showed C2-like symmetry with large root-mean-square deviation. The optical properties electronic structures were analyzed using magnetic circular dichroism spectroscopy time-dependent density functional theory calculations.
On-chip cavity magnomechanics is an emerging field exploring acoustic and magnonic functionalities of various ferromagnetic materials structures using strongly confined phonons. It expected that such can be extended to multilayer ferromagnets, especially synthetic antiferromagnets (SAFs) exhibit zero net magnetization through interlayer exchange coupling. However, the conventional theoretical framework for a single ferromagnet cannot used directly because antiferromagnetic dynamics...