Search results for: Noboru Yoshimura

Items from 1 to 20 out of 35 results

article

Understanding the Impact of Corona Aging of Ester Oil Adopting Fluorescent Technique

Soumya Thakur, Swayam Prakash, A. K. Mishra, R. Sarathi, more

INAE Letters > 2018 > 3 > 4 > 251-256

Performance and life of any transformer depend entirely on the dielectric property of the insulation used. In recent times, ester oil is replacing the mineral oil. In this paper, effects of electrical aging on ester oil in the presence of pressboard as a barrier between high voltage and ground electrode is studied. Corona inception voltage has been used to understand the variation in the electrical...

article

Study of wireless temperature measurement induction heating system using magnetic properties of au‐coated ferromagnetic implant with low Curie temperature

Fumitaka Aki, Tonthat Loi, Hajime Saito, Noboru Yoshimura, more

Electronics and Communications in Japan > 101 > 6 > 58 - 66

In this paper, we aim to build wireless temperature measurement induction heating system for hyperthermia using “Au‐coated Ferromagnetic Implant with Low Curie Temperature (Au‐FILCT)”. Using this system we clarified the distance‐dependent characteristic of voltage used for detecting temperature in heating process of Au‐FILCT under high‐frequency magnetic field applied. The tumor temperature is measurable...

article

Position adjustment method and distance estimation method of magnetic field supply and detection unit for magnetic hyperthermia

Loi Tonthat, Fumitaka Aki, Eiki Matsuda, Hajime Saito, more

IEEJ Transactions on Electrical and Electronic Engineering > 12 > S2 > S3 - S9

In magnetic hyperthermia, the temperature and localization of a ferromagnetic implant in a tumor region is vital in determining the effectiveness of therapeutic heating. We have developed a noninvasive wireless temperature measurement method by utilizing the magnetic permeability property of a ferromagnetic implant with low Curie temperature (FILCT) that varies with the temperature. In clinical settings,...

article

Accuracy Improvement of Low‐Invasive Temperature Measurement for Hyperthermia Treatment Using a Ferromagnetic Implant with Low Curie Temperature

RYUHEI MIYAMOTO, HAJIME SAITO, MASAFUMI SUZUKI, NOBORU YOSHIMURA, more

Electronics and Communications in Japan > 99 > 3 > 55 - 62

We investigated a hyperthermia treatment method in which a ferromagnetic implant with a low Curie temperature (FILCT) is implanted into a malignant tumor and then a high‐frequency magnetic field is applied outside the body. In earlier studies, we confirmed that the target temperature of the tumor can be noninvasively monitored by detecting changes in the magnetic field caused by changes in magnetic...

article

Rotary scanning wireless temperature measurement method for hyperthermia using ferromagnetic implants

Loi Tonthat, Hajime Saito, Ryuhei Miyamoto, Masafumi Suzuki, more

IEEJ Transactions on Electrical and Electronic Engineering > 10 > S1 > S1 - S6

Recently, the use of a ferromagnetic material in a soft‐heating method has garnered much attention as a novel method for cancer treatment. By concurrently using this material as a thermal probe, we are currently developing a minimally invasive heating and wireless temperature measurement system. To make the approach feasible in a clinical setting, it is vital to overcome the key challenge of heating...

article

Su1718 Endocytoscopy for Superficial Non-Ampullary Duodenal Epithelial Tumors: a Feasibility Study

Akira Dobashi, Kenichi Goda, Noboru Yoshimura, Jimi Mitobe, more

Gastrointestinal Endoscopy > 2015 > 81 > 5 Supplement > AB390

article

Effects of catalyst layer on the structural change of a membrane electrode assembly under humidity cycle tests

Yoshiyuki Hashimasa, Tomoaki Numata, Noboru Yoshimura

Journal of Power Sources > 2014 > 265 > Complete > 30-35

Structural changes in a polymer electrolyte membrane (PEM) and a membrane electrode assembly (MEA) of different catalyst thickness under humidity cycle tests were investigated. Nafion211 membrane was used in this study. The catalyst layer thickness of MEAs was set to 2–10 μm using catalyst paste of the same composition. Dimensional changes in the PEM and MEA due to swelling were measured, and dynamic...

article

Improvement of continuous‐wave terahertz imaging system for cellulose acetate membrane electrophoresis

Hongbing Zhang, Kazutaka Mitobe, Mahmudul Kabir, Masafumi Suzuki, more

IEEJ Transactions on Electrical and Electronic Engineering > 7 > S1 > S126 - S131

We have successfully achieved terahertz imaging of cellulose acetate membrane electrophoresis of egg albumin using continuous‐wave imaging at 0.189 THz. A sample holder has been devised that can eliminate the membrane crook generated in the drying process after electrophoresis. A probe has been also fabricated, which was assembled with a Schottky barrier diode detector to detect the terahertz signal...

article

Tu1697 Can the Gastric ESD Be Improved Further? A Review of Outcomes of a High Volume Institution With More Than Ten Years and Thousand Cases Experience

Atsushi Hoshino, Kazuki Sumiyama, Akira Dobashi, Tomohiko R. Ohya, more

Gastrointestinal Endoscopy > 2012 > 75 > 4 Supplement > AB492

article

Tu1677 Endocytoscopy for Superficial Duodenal Neoplasms

Kenichi Goda, Noboru Yoshimura, Akira Dobashi, Naoto Tamai, more

Gastrointestinal Endoscopy > 2012 > 75 > 4 Supplement > AB485

article

Excess activated sludge reduction by using electromagnets and ferrite particles

Mahmudul Kabir, Masafumi Suzuki, Noboru Yoshimura

IEEJ Transactions on Electrical and Electronic Engineering > 7 > 2 > 220 - 224

Every year, the ratio of the sewarage treatment to population is increasing in Japan. Expansion in sewer networks is leading to the production of excess sludge which is one of the major problems in wastewater treatment plants. There are several approaches to treat the excess activated sludge. A new approach is to reduce excess sludge production by using magneto‐ferrite treatment. The Suzuki Lab of...

chapter

Development of Pedestrian simulator for the prevention of traffic accidents involving elderly pedestrians

Kazutaka Mitobe, Masafumi Suzuki, Noboru Yoshimura

2012 Proceedings of SICE Annual Conference (SICE) > 1365 - 1368

SICE 2012 - 51st Annual Conference of the Society of Instrument and Control Engineers of Japan

In Japan, 48.5% of traffic death accidents s related with elderly people. In this study, a device for simulation of road crossing (Pedestrian simulator) was developed to allow people in order to experience “dangerous road crossing” indoor and safely. From this study it became clear that there were great individual variations among elderly people. Even who appear to be healthy with the same ability...

article

Bacteremia and endotoxemia after endoscopic submucosal dissection for gastric neoplasia: pilot study

Masayuki Kato, Mitsuru Kaise, Toru Obata, Jin Yonezawa, more

Gastric Cancer > 2012 > 15 > 1 > 15-20

Background Because the invasive procedure of endoscopic submucosal dissection (ESD) entails a large mucosal defect which is left open, with extensive submucosal exposure to the indigenous bacterial flora, the procedure may have a substantial risk for bacteremia. Our aim was to examine gastric ESD-related bacteremia and endotoxemia in gastric neoplasia patients. Methods In patients who underwent...

article

Measurement of electrical characteristics of ZnO microvaristors

Mahmudul Kabir, Masafumi Suzuki, Noboru Yoshimura, Kayo Shiozawa, more

IEEJ Transactions on Electrical and Electronic Engineering > 7 > 1 > 107 - 108

A measurement technique is developed to measure the characteristics of zinc oxide (ZnO) microvaristors directly. We used Cu wires, a micromanipulator, and an optical microscope to gain ohmic contact of the measurement apparatus with ZnO particles. With our system, the I−V characteristics and C⁻²−V characteristics were measured for 25 µm ZnO microvaristors. Our measurements show that these microparticles...

chapter

Analysis of the dendrite on printed wiring board by soft X-ray microscope and THz imaging: Structure of the dendrite in Ion-migration

Kazutaka Mitobe, Masafumi Suzuki, Noboru Yoshimura

2011 International Conference on Power and Energy Systems > 1 - 4

2011 International Conference on Power and Energy Systems (ICPS)

Ion migration that causes short circuit to an insulated printed wiring board (PWB) occurs in highly humid environment under electrical field. In this paper, water drop test (WDT) method was used as an acceleration test of ion migration. We have investigated the dendrite using three different bands of electromagnetic wave, x-ray, visible light and THz wave. As the results, THz imaging system is superior...

chapter

Three-dimensional equivalent circuit analysis of water tree

Masafumi Suzuki, Noboru Yoshimura

2011 International Conference on Power and Energy Systems > 1 - 4

2011 International Conference on Power and Energy Systems (ICPS)

It is widely recognized that degradation by water tree of electrical power cables would cause serious problems. Therefore, many methods have been studied in order to detect water tree at the early stages. The loss current analysis is one of the methods which can detect water tree, since the degradation of CV cable by water tree gives rise to harmonics in the loss current. Many researches by simulation...

article

CLINICAL IMPACT OF NARROW‐BAND IMAGING MAGNIFYING ENDOSCOPY FOR ‘BASAL LAYER TYPE SQUAMOUS CELL CARCINOMA’ IN THE ESOPHAGUS

KENICHI GODA, HISAO TAJIRI, MASAHIRO IKEGAMI, AKIRA DOBASHI, more

Digestive Endoscopy > 23 > s1 > 75 - 78

A 61‐year‐old man had received endoscopic submucosal dissection (ESD) for early gastric cancer twice. Then he had undergone annual control esophagogastroduodenoscopy using narrow‐band imaging (NBI) magnifying endoscope. At the esophagogastroduodenoscopy, we were not able to detect any significant finding in the esophagus by conventional endoscopy. Switching to NBI mode, a brownish area was showed...

article

Mo1549 Diagnostic Utility of Narrow-Band Imaging Endoscopy for Superficial Pharyngeal Squamous Cell Carcinoma

Akira Dobashi, Kenichi Goda, Noboru Yoshimura, Kazuki Sumiyama, more

Gastrointestinal Endoscopy > 2011 > 73 > 4(S) > AB383

chapter

Analysis of dexterous finger movements for writing using a Hand Motion Capture system

Kazutaka Mitobe, Masachika Saitoh, Noboru Yoshimura

2010 IEEE International Conference on Virtual Environments, Human-Computer Interfaces and Measurement Systems > 60 - 63

2010 IEEE International Conference on Virtual Environments, Human-Computer Interfaces and Measurement Systems (VECIMS 2010)

Motion capture (MoCap) technique that can digitize a position and a posture as a function of time is widely used in order to create animation and CG. It is very difficult to measure all hand movements because one hand has twenty-seven bones and nineteen joints. Therefore, it has been impossible to record the finger movements of a sports player that are high in speed and in accuracy. In this study,...

article

Take-home Message

Masayuki Kato, Mitsuru Kaise, Jin Yonezawa, Hirobumi Toyoizumi, more

Gastrointestinal Endoscopy > 2010 > 72 > 3 > 523-529

Conventional, white-light imaging endoscopy (WLE) results in a significant number of misdiagnoses in early gastric cancer. Magnifying endoscopy combined with narrow-band imaging (ME-NBI) is more accurate in the diagnosis of gastric cancer when the diagnostic triad of the disappearance of fine mucosal structure, microvascular dilation, and heterogeneity is used.The aim of the present study was to evaluate...

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INFONA - science communication portal

Search results for: Noboru Yoshimura

Understanding the Impact of Corona Aging of Ester Oil Adopting Fluorescent Technique

Study of wireless temperature measurement induction heating system using magnetic properties of au‐coated ferromagnetic implant with low Curie temperature

Position adjustment method and distance estimation method of magnetic field supply and detection unit for magnetic hyperthermia

Accuracy Improvement of Low‐Invasive Temperature Measurement for Hyperthermia Treatment Using a Ferromagnetic Implant with Low Curie Temperature

Rotary scanning wireless temperature measurement method for hyperthermia using ferromagnetic implants

Su1718 Endocytoscopy for Superficial Non-Ampullary Duodenal Epithelial Tumors: a Feasibility Study

Effects of catalyst layer on the structural change of a membrane electrode assembly under humidity cycle tests

Improvement of continuous‐wave terahertz imaging system for cellulose acetate membrane electrophoresis

Tu1697 Can the Gastric ESD Be Improved Further? A Review of Outcomes of a High Volume Institution With More Than Ten Years and Thousand Cases Experience

Tu1677 Endocytoscopy for Superficial Duodenal Neoplasms

Excess activated sludge reduction by using electromagnets and ferrite particles

Development of Pedestrian simulator for the prevention of traffic accidents involving elderly pedestrians

Bacteremia and endotoxemia after endoscopic submucosal dissection for gastric neoplasia: pilot study

Measurement of electrical characteristics of ZnO microvaristors

Analysis of the dendrite on printed wiring board by soft X-ray microscope and THz imaging: Structure of the dendrite in Ion-migration

Three-dimensional equivalent circuit analysis of water tree

CLINICAL IMPACT OF NARROW‐BAND IMAGING MAGNIFYING ENDOSCOPY FOR ‘BASAL LAYER TYPE SQUAMOUS CELL CARCINOMA’ IN THE ESOPHAGUS

Mo1549 Diagnostic Utility of Narrow-Band Imaging Endoscopy for Superficial Pharyngeal Squamous Cell Carcinoma

Analysis of dexterous finger movements for writing using a Hand Motion Capture system

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