A5048557340- 3D Surveying and Cultural Heritage
- Optical Imaging and Spectroscopy Techniques
- Chaos-based Image/Signal Encryption
- Non-Invasive Vital Sign Monitoring
- Remote Sensing and LiDAR Applications
- Biometric Identification and Security
- Heart Rate Variability and Autonomic Control
- Thermoregulation and physiological responses
- Sensor Technology and Measurement Systems
- Robotics and Sensor-Based Localization
- Magnetic Field Sensors Techniques
- Satellite Image Processing and Photogrammetry
- Hemodynamic Monitoring and Therapy
- Sepsis Diagnosis and Treatment
- Thermal Regulation in Medicine
- Optical measurement and interference techniques
- Non-Destructive Testing Techniques
- Cryptographic Implementations and Security
- Xenotransplantation and immune response
- Advanced Steganography and Watermarking Techniques
- Cardiovascular Health and Disease Prevention
- Color Science and Applications
- Immune Response and Inflammation
- Skin Protection and Aging
- Cell Adhesion Molecules Research
Seikei University
2022-2023
University of Miyazaki
2020-2022
Asahi Kasei (Japan)
2011-2022
Chiba University
2001-2020
Meiji University
2008-2019
Tokyo Denki University
1997-2018
Kyushu University
2004-2018
Tokyo University of Science
2016-2017
Nippon Sport Science University
2014-2015
Tokyo Institute of Technology
2010-2013
In this study, we have investigated CD40 expression in human peripheral blood eosinophils and chronically inflamed nasal tissues, i.e., polyps. We show by both reverse transcriptase-PCR Northern blot analysis that from allergic subjects express mRNA. also constitutive mRNA could be upregulated exposure to IgA immune complexes downregulated IL-10 the synthetic steroid budesonide. addition, demonstrate protein flow cytometry. Such is biologically functional as cross-linking with mAbs enhances...
Abstract Peripheral hemodynamics, measured via the blood volume pulse and vasomotion, provide a valuable way of monitoring physiological state. Camera imaging-based systems can be used to measure these peripheral signals without contact with body, at distances multiple meters. While researchers have paid attention non-contact imaging photoplethysmography, study hemodynamics effect autonomic nervous system activity on has received less attention. Using method, based tissue-like model skin, we...
Understanding the changes in choroidal thickness and vasculature is important to monitor development progression of various ophthalmic diseases. Accurate segmentation choroid layer vessels critical better analyze understand changes. In this study, we develop a dense dilated U-Net model (ChoroidNET) for segmenting optical coherence tomography (OCT) images. The performance ChoroidNET evaluated using an OCT dataset that contains images with retinal pathologies. Overall Dice coefficient 95.1 ±...
Classical double-random phase encoding (C-DRPE) is an optical symmetric-key encryption technique. C-DRPE reported to be vulnerable a known-plaintext attack (KPA) that uses retrieval algorithm. However, although phase-only DRPE (PO-DRPE) more resistant KPAs than C-DRPE, it not obvious yet PO-DRPE sufficiently KPA under any condition, because the vulnerability varies depending on various factors, such as number of known plaintext-ciphertext pairs are given for KPA, or gray level image (i.e.,...
Phosphoric acid was used an n-type doping source to make emitter for silicon solar cells. This paper reports on a cold spray method coat phosphoric the wafer without any additional complicated and corrosive heating system. The key parameters such as belt speed, flow rate of carrier gas, concentration are optimized get uniform reproducible sheet resistance emitter. diffusion process has been studied by firing wafers that spray-coated with acid. screen printed cells have fabricated using...
We propose a novel biometric sensing technique for personal authentication in which fingerprint images are captured using an optical encryption method. This method can reduce the risk of data theft or leakage information by sensing. method, termed encrypted sensing, is implemented digital holography with double random phase encoding. demonstrate experimentally that image be as optically and restored correctly only when correct cipher key used. Moreover, we investigate verification accuracy...
A new type of small magnetic rotary encoder is presented. The device detects the field a permanent magnet attached to end rotating shaft using complementary metal-oxide semiconductor (CMOS) sensors [magnetic effect transistor (MAGFET) arrays] set in square arrangement. sensor array integrated onto CMOS chip along with angle-detection circuits, leading realization compact, cost-effective encoder. prototype dimensions 4.3/spl times/4.3 mm/sup 2/ shown provide error as low 3.5/spl deg/ without...
We began this study by synthesizing apatite fibers (AFs) and silicon-containing (Si-AFs) using a homogeneous precipitation method. Next, we have successfully fabricated three-dimensional fiber scaffolds (AFSs) (Si-AFSs) the above AFs Si-AFs, respectively. Finally, enhanced mechanical properties of carbon beads (CBs) with diameters 20 μm 150 μm, conducted uniaxial pressing green compacts. These were named "AFS100," "AFS300," "Si-AFS100," "Si-AFS300" based on AF (or Si-AF)/CB ratio. In study,...
In a delicate operation, the appearance of organs and tissues is an essential factor for surgeons to figure out hemodynamic state tissue or identify vascular regions. open surgery, have direct view surgical area with naked eye through microscope. Under these circumstances, spectral characteristics illuminant are most effective ensure successful operations. this study, we designed optimal enhance microvascular structures. Two factors were used in design: whiteness contrast between blood...
The present study aimed at establishing a new cryopreservation method for mouse pancreatic islets by vitrification using hollow fibers as container. A unique feature of the fiber (HFV) is that this achieves stable minimum volume cryoprotectant (CPA) solution, thereby ensuring high viability islets. cytotoxicity, optimum composition, and concentration CPAs vitrifying were examined. viability, functional-integrity vitrified evaluated in comparison with those conventional methods. Insulin...
We propose a simple and affordable imaging technique to evaluate transcutaneously multiple physiological parameters by using digital red-green-blue camera. In this method, the RGB-values were converted into tristimulus values in CIE (Commission Internationale de l'Eclairage) XYZ color space, which is compatible with common spaces. Monte Carlo simulation for light transport biological tissue was then performed specify relationship among XYZ-values concentrations of oxygenated hemoglobin,...
Monitoring oxygen saturation (SO2) in microcirculation is effective for understanding disease dynamics. We have developed an SO2 estimation method, sidestream dark-field (SDF) oximetry, based on SDF imaging. imaging a noninvasive and clinically applicable technique to observe microcirculation. report the first vivo experiment observing changes of using oximetry. First, heat from light-emitting diodes used might affect hemodynamics microcirculation, hence, we performed evaluate influence that...
Although initial research shows that double-random phase encoding (DRPE) is vulnerable to known-plaintext attacks use retrieval algorithms, subsequent has shown phase-only DRPE, in which the Fourier amplitude component of an image encrypted with classical DRPE remains constant, resistant apply algorithms. Herein, we numerically analyze key-space and investigate distribution property decryption keys for DRPE. We determine difference successful these techniques from numerical analysis results...
With the appearance of low-cost and high-resolution consumer-grade digital cameras, a practical three-dimensional (3D) measurement system using camera is greatly anticipated in various fields. In these circumstances, authors have been concentrating on developing 3D that includes photogrammetric software called Image Based Integrated Measurement (IBIM) system. The IBIM device consists full/half-mirrors, camera, laser distance meter. most remarkable advantage its ability to calculate exterior...
It has been shown that biometric information can be used as a cipher key for binary data encryption by applying double random phase encoding. In such methods, are encoded in bit pattern image, and the decrypted image becomes plain when is genuine; otherwise, images become images. some cases, imposters may not fully random, blurred partially observed. this paper, we propose novel coding method based on Fourier transform hologram, which makes more random. Computer experiments confirm increases...
We propose a red, green, blue (RGB)-based oximetry to assess the ocular fundus and determine its oxygen saturation (SO2) hemoglobin concentration. The oxygenated concentration, deoxygenated SO2 were estimated employing method that combines Monte Carlo simulation of light transport in tissue with multiple regression analysis. In this study, single-layer model was employed for simulation. constructed an experimental apparatus measuring rat's eye using RGB detector investigated physiological...
The security of important information captured by sensors and cameras is currently a growing concern as theft via techniques such side-channel attacks become increasingly more prevalent. Double random phase encoding (DRPE) an optical encryption method based on Fourier transform that being used to implement secure coherent systems. In this paper, we propose new DRPE implementation for incoherent systems integral photography can be applied "encrypted imaging (EI)" optically encrypt image...