Takashi Sekiguchi
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View article: Diabetic Ketoacidosis Triggered by Retropharyngeal Abscess Complicated by Descending Necrotizing Mediastinitis: A Case Report
Diabetic Ketoacidosis Triggered by Retropharyngeal Abscess Complicated by Descending Necrotizing Mediastinitis: A Case Report Open
A 62-year-old woman with poorly controlled type 2 diabetes mellitus presented with a fever and altered consciousness. The patient was diagnosed with diabetic ketoacidosis (DKA) with a positive blood culture for group A Streptococcus. Altho…
View article: Characterization of ultra-variable-pressure detector for secondary electrons in low-vacuum SEM
Characterization of ultra-variable-pressure detector for secondary electrons in low-vacuum SEM Open
Scanning electron microscope (SEM) observation in low vacuum can overcome the issue of charge-up at the specimen surface, allowing for the observation of insulating samples without sample pretreatment. The ultra-variable-pressure detector …
View article: Effect of sequential N ion implantation in the formation of a shallow Mg-implanted <i>p</i>-type GaN layer
Effect of sequential N ion implantation in the formation of a shallow Mg-implanted <i>p</i>-type GaN layer Open
An area-selectable Mg doping via ion implantation (I/I) is essential to realize gallium nitride (GaN) based power switching devices. Conventional post-implantation annealing forms considerable defects in the GaN, resulting in extremely low…
View article: WCN24-866 THE TYPE OF HEPARIN USED FOR ANTICOAGULATION IN PATIENTS ON HEMODIALYSIS AFFECTS CARNITINE METABOLISM
WCN24-866 THE TYPE OF HEPARIN USED FOR ANTICOAGULATION IN PATIENTS ON HEMODIALYSIS AFFECTS CARNITINE METABOLISM Open
Carnitine not only serves as a transporter, shuttling free fatty acids (FFAs) into the mitochondria, but it also plays a crucial role in essential lipid metabolism processes within the mitochondria, including beta oxidation.
View article: A statistical analysis of over three thousand meteors and their spectra
A statistical analysis of over three thousand meteors and their spectra Open
In this article, over three thousand meteor spectra recorded in Saitama, Japan, between 2018 and 2021 are analysed. We performed a principal component analysis of the intensity of the sodium and magnesium lines and the iron band of each me…
View article: Abnormal carnitine metabolism in hemodialysis patients on different anticoagulants
Abnormal carnitine metabolism in hemodialysis patients on different anticoagulants Open
Introduction We aimed to determine whether unfractionated heparin (UH) and low molecular weight heparin (LH) contribute to aberrant carnitine metabolism in patients receiving hemodialysis. Methods The rate of increase in serum free fatty a…
View article: Atomic-scale investigation of implanted Mg in GaN through ultra-high-pressure annealing
Atomic-scale investigation of implanted Mg in GaN through ultra-high-pressure annealing Open
An area selective doping via ion implantation is a key technology to realize gallium nitride (GaN) based energy-efficient power devices; however, conventional annealing leads to the formation of numerous Mg-enriched defects, which result i…
View article: Stable single atomic silver wires assembling into a circuitry-connectable nanoarray
Stable single atomic silver wires assembling into a circuitry-connectable nanoarray Open
Atomic metal wires have great promise for practical applications in devices due to their unique electronic properties. Unfortunately, such atomic wires are extremely unstable. Here we fabricate stable atomic silver wires (ASWs) with apprec…
View article: Analysis on the Shapes of the Shockley type Stacking Faults Generated by the REDG Effect in the 4H-SiC Power Devices
Analysis on the Shapes of the Shockley type Stacking Faults Generated by the REDG Effect in the 4H-SiC Power Devices Open
A complete set of 12 different dissociated states of basal-plane dislocation loops in 4H-SiC has been derived from experimental observations and crystallographic space group discussion. We have observed dissociated states of dislocations i…
View article: Electron-Beam-Induced Current and Cathodoluminescence Study of Dislocations in SrTiO3
Electron-Beam-Induced Current and Cathodoluminescence Study of Dislocations in SrTiO3 Open
Electron-beam-induced current (EBIC) and cathodoluminescence (CL) have been applied to investigate the electrical and optical behaviors of dislocations in SrTiO3. The electrical recombination activity and defect energy levels of dislocatio…
View article: Mg diffusion and activation along threading dislocations in GaN
Mg diffusion and activation along threading dislocations in GaN Open
The precise control of p-GaN is a crucial issue for developing GaN-based power devices. Mg as an acceptor is commonly used in p-type doping; however, the Mg diffusion through threading dislocations (TDs) has not been well addressed. To cla…
View article: Cathodoluminescene study of Mg implanted GaN: the impact of dislocation on Mg diffusion
Cathodoluminescene study of Mg implanted GaN: the impact of dislocation on Mg diffusion Open
Magnesium (Mg) ion implanted homoepitaxial GaN layers is investigated by cathodoluminescence (CL) and secondary ion mass spectrometry (SIMS). The impact of dislocations on Mg diffusion is clarified by CL monitoring the Mg-related donor-acc…
View article: Wafer-scale analysis of GaN substrate wafer by imaging cathodoluminescence
Wafer-scale analysis of GaN substrate wafer by imaging cathodoluminescence Open
With the progress in large-size high-quality GaN substrates, wafer-scale analysis is needed to evaluate homogeneity and defect distribution. We demonstrate the mapping of a 2 inch GaN substrate wafer based on the imaging cathodoluminescenc…
View article: Energy and Direction Resolved Secondary Electron Imaging Using Fountain Detector
Energy and Direction Resolved Secondary Electron Imaging Using Fountain Detector Open
We have been advocating so-called “Fountain Detector (FD)” for low energy secondary electron (SE) detection in scanning electron microscope (SEM). FDs are simple but easily expanded not only energy filtered but also angle filtered SE image…
View article: Investigation of Si Dendrites by Electron-Beam-Induced Current
Investigation of Si Dendrites by Electron-Beam-Induced Current Open
This paper reports on electron-beam-induced current (EBIC) characterization of special multicrystalline Si ingot by dendritic growth under high undercooling. Grain boundaries (GBs), dislocations, and their interaction with carbon related p…
View article: Low Energy Secondary Electron Imaging of Nanosheets Using Inverted Fountain Detector
Low Energy Secondary Electron Imaging of Nanosheets Using Inverted Fountain Detector Open
An abstract is not available for this content so a preview has been provided. As you have access to this content, a full PDF is available via the ‘Save PDF’ action button.
View article: Effect of Rubidium for Thermal Stability of Triple-cation Perovskite Solar Cells
Effect of Rubidium for Thermal Stability of Triple-cation Perovskite Solar Cells Open
Thermal stability of perovskite solar cells is crucial for their practical use. In this report, we show good 74% stability retention after a thermal stress test at 85 °C for 350 h) with high efficiency (>18%) using Rb modified perovskite a…
View article: Transition of Emission Colours as a Consequence of Heat-Treatment of Carbon Coated Ce3+-Doped YAG Phosphors
Transition of Emission Colours as a Consequence of Heat-Treatment of Carbon Coated Ce3+-Doped YAG Phosphors Open
To modify the luminescence properties of Ce3+-doped Y3Al5O12 (YAG) phosphors, they have been coated with a carbon layer by chemical vapor deposition and subsequently heat-treated at high temperature under N2 atmosphere. Luminescence of the…
View article: Development of a Fountain Detector for Spectroscopy of Secondary Electrons in SEM
Development of a Fountain Detector for Spectroscopy of Secondary Electrons in SEM Open
Journal Article Development of a Fountain Detector for Spectroscopy of Secondary Electrons in SEM Get access Toshihide Agemura, Toshihide Agemura National Institute for Materials Science, Nano-Electronics Material Unit, Tsukuba, JapanUnive…
View article: Readability of Japanese Electronic Text with Bunsetsu-based Layouts
Readability of Japanese Electronic Text with Bunsetsu-based Layouts Open
We propose bunsetsu-based layouts to improve the efficiency of eye movements in reading Japanese text. When reading text, people tend to direct their gaze toward the center of a word. This is called the optimal viewing position. The optima…
View article: Bacterial flora in the digestive tracts of Eptatretus okinoseanus
Bacterial flora in the digestive tracts of Eptatretus okinoseanus Open
This work was aimed at characterizing the microbial community in the digestive tracts of the hagfish, Eptatretus okinoseanus. The methods applied were conventional culture-dependent as well as nonviable molecular techniques. Culture-depend…
View article: Deep-level defects related to the emissive pits in thick InGaN films on GaN template and bulk substrates
Deep-level defects related to the emissive pits in thick InGaN films on GaN template and bulk substrates Open
We studied the emissive pits in InGaN films grown on compressive and strain-free GaN underlying layers. Pit density decreased with the full width at half maximum of ω(0002) of InGaN. The films grew on compressive and strain-free GaN underl…
View article: Continuous beam scanning performance of dipole array antenna coupled to meander two-wire parallel transmission line
Continuous beam scanning performance of dipole array antenna coupled to meander two-wire parallel transmission line Open
A mechanical beam scanning dipole array antenna coupled to a meander two-wire parallel transmission line is proposed.A meander transmission line is introduced to the proposed antenna in order to suppress its grating lobe without using lump…