Search results for: Yusuke Kawai

Items from 1 to 20 out of 36 results

article

Present status and the future of ultrathin endoscopy

Takashi Kawai, Yusuke Kawai, Mariko Hamada, Eri Iwata, more

Digestive Endoscopy > 34 > 6 > 1110 - 1120

Endoscopic population‐based screening for gastric cancer began in April 2016, and the use of transnasal ultrathin esophagogastroduodenoscopy (UT‐EGD) has rapidly become popular. With UT‐EGD, discomfort associated with an examination is reduced, patient satisfaction is high, and adverse effects on cardiopulmonary function are fewer. Consequently, UT‐EGD is a good option for gastric screening in an...

article

Penile calciphylaxis in patients with end‐stage kidney disease undergoing dialysis: Invasive treatment and pain management

Yusuke Kawai, Masataka Banshodani, Misaki Moriishi, Hiroko Shizukawa, more

Therapeutic Apheresis and Dialysis > 26 > 5 > 950 - 959

Introduction Penile calciphylaxis is rarely reported in dialysis patients. Methods We experienced cases of dialysis patients who had penile calciphylaxis between 2003 and 2020. Results Seven patients undergoing dialysis were treated for penile necrosis (hemodialysis [HD], 5; peritoneal dialysis [PD], 1; hybrid therapy comprising PD and HD, 1). Their mean age was 62.8 years and their mean dialysis...

article

Iliopsoas Abscess in Hemodialysis Patients With End‐Stage Kidney Disease

Yusuke Kawai, Masataka Banshodani, Misaki Moriishi, Tomoyasu Sato, more

Therapeutic Apheresis and Dialysis > 23 > 6 > 534 - 541

Iliopsoas abscess in HD patients is rare. We examined nine HD patients with iliopsoas abscess (six men and five diabetes mellitus cases) treated between 2005 and 2015. Mean age and dialysis vintage at onset were 72 years and 109 months, respectively. Of the nine patients, four had lumbar orthopedic diseases, and two had all components of the classic triad of iliopsoas abscess at onset. All nine patients...

article

Comparison of wiping and rinsing techniques after oral care procedures in critically ill patients during endotracheal intubation and after extubation: A prospective cross‐over trial

Keita Muramatsu, Koichiro Matsuo, Yusuke Kawai, Tsukasa Yamamoto, more

Japan Journal of Nursing Science > 16 > 1 > 80 - 87

Aim Endotracheal intubation of critically ill patients increases the risk of aspiration pneumonia, which can be reduced by regular oral care. However, the rinsing of the residual oral contaminants after mechanical cleaning carries the risk of aspirating the residue during the intubation period. Removing the contaminants by wiping with mouth wipes could be an alternative to rinsing with water because...

article

Increased Cardio-Ankle Vascular Index Is Associated With the Development of Heart Failure in Patients With Preserved Ejection Fraction

Tamaki Ono, Toru Miyoshi, Yuko Ohno, Gentaro Shokoku, more

Journal of Cardiac Failure > 2017 > 23 > 10(S) > S86-S87

article

Effect of remote ischemia or nicorandil on myocardial injury following percutaneous coronary intervention in patients with stable coronary artery disease: A randomized controlled trial

Toru Miyoshi, Kentaro Ejiri, Kunihisa Kohno, Makoto Nakahama, more

International Journal of Cardiology > 2017 > 236 > C > 36-42

The effect of remote ischemic preconditioning (RIPC) and nicorandil on periprocedural myocardial injury (pMI) in patients with planned percutaneous coronary intervention (PCI) remains controversial. The aim of this randomized trial was to evaluate the effect of RIPC or nicorandil on pMI following PCI in patients with stable coronary artery disease (CAD) compared with a control group.Patients with...

chapter

High-robust acceleration control using force and position sensors integrated disturbance observer

Yusuke Kawai, Yuki Yokokura, Kiyoshi Ohishi, Pattawan Boonwong

IECON 2016 - 42nd Annual Conference of the IEEE Industrial Electronics Society > 5802 - 5807

IECON 2016 - 42nd Annual Conference of the IEEE Industrial Electronics Society

For the high performance of force/torque control, an approach using a disturbance observer is known to be effective. However, a conventional disturbance observer cannot perfectly compensate for the disturbance torque when the disturbance torque (for example, impact torque) is instantaneous. This paper proposes a force and position sensors integrated disturbance observer (FPIDO), and analyzes its disturbance-suppression...

article

Coronary lesion characteristics with mismatch between fractional flow reserve derived from CT and invasive catheterization in clinical practice

Kazuhiro Osawa, Toru Miyoshi, Takashi Miki, Yuji Koide, more

Heart and Vessels > 2017 > 32 > 4 > 390-398

High diagnostic performance of noninvasive fractional flow reserve computed from CT (FFR-CT) was recently reported in prospective multicenter trials. The aims of this study were to evaluate the diagnostic accuracy of FFR-CT in clinical practice and to examine the lesion characteristics showing a mismatch between FFR-CT and invasive FFR. A total of 20 patients (29 vessels) with suspected coronary artery...

article

Multiple spreading phenomena for a free boundary problem of a reaction–diffusion equation with a certain class of bistable nonlinearity

Yusuke Kawai, Yoshio Yamada

Journal of Differential Equations > 2016 > 261 > 1 > 538-572

This paper deals with a free boundary problem for diffusion equation with a certain class of bistable nonlinearity which allows two positive stable equilibrium states as an ODE model. This problem models the invasion of a biological species and the free boundary represents the spreading front of its habitat. Our main interest is to study large-time behaviors of solutions for the free boundary problem...

chapter

Load-side acceleration control of a 2-inertia resonant system for fine torque servoing

Yuki Yokokura, Kiyoshi Ohishi, Yusuke Kawai

2016 IEEE 25th International Symposium on Industrial Electronics (ISIE) > 1246 - 1251

2016 IEEE 25th International Symposium on Industrial Electronics (ISIE)

This paper proposes a load-side acceleration control system for fine torque servoing. In the case of a 2-inertia resonant system, conventional motor-side acceleration control based on a disturbance observer induces resonant vibration that deteriorates load-side torque control. In order to solve the vibration problem, the proposed system consists of the motor-side acceleration controller, an I-PD torsion...

chapter

High back-drivable pseudo I-PD torque control using load-side torque observer with torsion torque sensor

Yusuke Kawai, Yuki Yokokura, Kiyoshi Ohishi, Kotaro Saito, more

2016 IEEE 14th International Workshop on Advanced Motion Control (AMC) > 167 - 172

2016 IEEE 14th International Workshop on Advanced Motion Control (AMC)

This paper proposes high back-drivable pseudo I-PD torque control using load-side torque observer with torsion torque sensor. According to previous research, the back-drivability of torsion torque control using torsion torque sensor depends on load-side friction. Therefore, the authors focus on load-side torque control. Load-side torque is estimated using load-side torque observer because load-side...

article

Clinical characteristics of responders to treatment with tolvaptan in patients with acute decompensated heart failure: Importance of preserved kidney size

Hironobu Toda, Kazufumi Nakamura, Makoto Nakahama, Tadashi Wada, more

Journal of Cardiology > 2016 > 67 > 2 > 177-183

Recent clinical trials have demonstrated the efficacy of short-term treatment with tolvaptan, an oral vasopressin V2 receptor antagonist, in patients with heart failure. However, the response to tolvaptan varies among patients. The aim of this study was to determine factors associated with response to tolvaptan in patients with acute decompensated heart failure (ADHF).The Tolvaptan Registry, a prospective,...

chapter

Equivalence of resonance ratio and I-PD controllers in zero stiffness torque control for soft robot

Yusuke Kawai, Yuki Yokokura, Kiyoshi Ohishi, Kotaro Saito, more

IECON 2015 - 41st Annual Conference of the IEEE Industrial Electronics Society > 1424 - 1429

IECON 2015 - 41st Annual Conference of the IEEE Industrial Electronics Society

Recently, a soft robot considering the contact of the human has attracted attention, and the zero stiffness torque control is required. Because a soft robot causes vibration at the load side, vibration suppression control of a soft robot is required. In this paper, the authors discuss position control and torque control of a soft robot by using a torsion torque sensor based on a resonance ratio control...

article

Fabrication and Characterization of Microstacked PZT Actuator for MEMS Applications

Mohd Faizul Mohd Sabri, Takahito Ono, Suhana Mohd Said, Yusuke Kawai, more

Journal of Microelectromechanical Systems > 2015 > 24 > 1 > 80 - 90

A microstacked PZT actuator of dimensions 8 mm

$\times 0.8$

$\times 0.4$

mm and capable of 2.3-

$\mu $

m actuation under a voltage of 100 V was fabricated and characterized. This actuator was then integrated into a silicon microstage with dimensions of 20 mm

$\times 20$

$\times 0.4$

mm requiring actuation by a miniaturized actuator. The microstage was designed containing a Moonie amplification...

article

Remote ischemic preconditioning reduces contrast-induced acute kidney injury in patients with ST-elevation myocardial infarction: A randomized controlled trial

Toshiaki Yamanaka, Yusuke Kawai, Toru Miyoshi, Tsutomu Mima, more

International Journal of Cardiology > 2015 > 178 > Complete > 136-141

Contrast medium-induced acute kidney injury (CI-AKI) is a cardiovascular complication after myocardial infarction treated with emergency percutaneous coronary intervention. The aim of this randomized, sham-controlled trial was to evaluate the impact of remote ischemic preconditioning (RIPC) on CI-AKI in patients with ST-elevation myocardial infarction who received emergency primary percutaneous coronary...

chapter

Ultrasensitive Si nanowire probe for magnetic resonance detection

Yong-Jun Seo, Masaya Toda, Yusuke Kawai, Takahito Ono

2014 IEEE 27th International Conference on Micro Electro Mechanical Systems (MEMS) > 151 - 154

2014 IEEE 27th International Conference on Micro Electro Mechanical Systems (MEMS)

In this study, we have fabricated a 210 nm-wide and 32 μm-long Si nanowire probe with a Si mirror from a silicon-on-insulator wafer. Additionally, a Nd-Fe-B magnet is mounteded at the end of the nanowire for magnetic force detection in MRFM measurements. The fabricated probe shows a resonance frequency f₀ of 11.256 kHz and a Q factor of 12000 after annealing at 800^oC for 2 hours in forming gas. The...

article

Fabrication of CNT-carbon composite microstructures using Si micromolding and pyrolysis

Liang He, Masaya Toda, Yusuke Kawai, Hidetoshi Miyashita, more

Microsystem Technologies > 2014 > 20 > 2 > 201-208

A fabrication method of carbon nanotube (CNT)-carbon composite microstructures has been developed. CNT-carbon composite microstructures with dimensions from 10 micrometers to several hundred micrometers have been fabricated by pyrolysis process from the patterned SU-8 photoresist mixed with 1 wt% of CNTs at temperature of ~600 °C under inert atmosphere. The resulting composite microstructures with...

chapter

Pressure measurement of gas flows through a micro-channel by phosphorescence dye

Yu Matsuda, Yusuke Kawai, Shobu Shibayama, Hiroki Yamaguchi, more

MHS2013 > 1 - 2

2013 International Symposium on Micro-NanoMechatronics and Human Science (MHS)

Gas flows through a micro-channel were experimentally studied by using PSCC (Pressure-Sensitive Channel Chip). PSCC is a micro-channel fabricated by PDMS containing a pressure-sensitive dye, and then it works as both a micro-channel and PSP (Pressure-Sensitive Paint). The micro-channel (PSCC) with 200 × 91 μm cross section and 2.0 mm long was fabricated. The pressure distribution with the inlet and...

chapter

Thermoelectric power generator based on a ferroelectric material combined with a bimetal thermostat

Takuya Saito, Yusuke Kawai, Takahito Ono

2013 Transducers & Eurosensors XXVII: The 17th International Conference on Solid-State Sensors, Actuators and Microsystems (TRANSDUCERS & EUROSENSORS XXVII) > 2280 - 2283

2013 Transducers & Eurosensors XXVII: The 17th International Conference on Solid-State Sensors, Actuators and Microsystems (TRANSDUCERS & EUROSENSORS XXVII)

A novel thermoelectric energy generator, which is based on pyroelectric power generation caused by periodic temperature change of a ferroelectric material, is developed. A bulk lead-zirconate-titanate (PZT) ceramic is attached on a bimetal disk. This bimetal disk is placed between heat and cold sources, which causes reciprocatory motion between the heat and cold sources. The temperature of the PZT...

chapter

Synchronization of stochastic resonance using coupled nonlinear silicon resonators

Yosuke Mitsui, Yusuke Kawai, Takahito Ono

2013 Transducers & Eurosensors XXVII: The 17th International Conference on Solid-State Sensors, Actuators and Microsystems (TRANSDUCERS & EUROSENSORS XXVII) > 2013 - 2016

2013 Transducers & Eurosensors XXVII: The 17th International Conference on Solid-State Sensors, Actuators and Microsystems (TRANSDUCERS & EUROSENSORS XXVII)

In this paper, we report on the mechanical coupling of the stochastic resonance (SR) in 100 nm-thick Si cantilevered resonators. Nonlinear resonators exhibit SR response by applying noise, in which the resonator shows two vibration states. The SR responses of coupled resonators are investigated, and it is found that SR is affected by each other. Moreover, the nonlinearity of each resonator can be...

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INFONA - science communication portal

Search results for: Yusuke Kawai

Present status and the future of ultrathin endoscopy

Penile calciphylaxis in patients with end‐stage kidney disease undergoing dialysis: Invasive treatment and pain management

Iliopsoas Abscess in Hemodialysis Patients With End‐Stage Kidney Disease

Comparison of wiping and rinsing techniques after oral care procedures in critically ill patients during endotracheal intubation and after extubation: A prospective cross‐over trial

Increased Cardio-Ankle Vascular Index Is Associated With the Development of Heart Failure in Patients With Preserved Ejection Fraction

Effect of remote ischemia or nicorandil on myocardial injury following percutaneous coronary intervention in patients with stable coronary artery disease: A randomized controlled trial

High-robust acceleration control using force and position sensors integrated disturbance observer

Coronary lesion characteristics with mismatch between fractional flow reserve derived from CT and invasive catheterization in clinical practice

Multiple spreading phenomena for a free boundary problem of a reaction–diffusion equation with a certain class of bistable nonlinearity

Load-side acceleration control of a 2-inertia resonant system for fine torque servoing

High back-drivable pseudo I-PD torque control using load-side torque observer with torsion torque sensor

Clinical characteristics of responders to treatment with tolvaptan in patients with acute decompensated heart failure: Importance of preserved kidney size

Equivalence of resonance ratio and I-PD controllers in zero stiffness torque control for soft robot

Fabrication and Characterization of Microstacked PZT Actuator for MEMS Applications

Remote ischemic preconditioning reduces contrast-induced acute kidney injury in patients with ST-elevation myocardial infarction: A randomized controlled trial

Ultrasensitive Si nanowire probe for magnetic resonance detection

Fabrication of CNT-carbon composite microstructures using Si micromolding and pyrolysis

Pressure measurement of gas flows through a micro-channel by phosphorescence dye

Thermoelectric power generator based on a ferroelectric material combined with a bimetal thermostat

Synchronization of stochastic resonance using coupled nonlinear silicon resonators

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