A5069113552- Biomimetic flight and propulsion mechanisms
- Mechanical Behavior of Composites
- Aerospace Engineering and Energy Systems
- Fluid Dynamics and Turbulent Flows
- Atrial Fibrillation Management and Outcomes
- Fish Ecology and Management Studies
- Fluid Dynamics and Vibration Analysis
- Wind Energy Research and Development
- Wind and Air Flow Studies
- Optical measurement and interference techniques
- Monoclonal and Polyclonal Antibodies Research
- Fiber-reinforced polymer composites
- Structural Behavior of Reinforced Concrete
- Textile materials and evaluations
- Underwater Vehicles and Communication Systems
- Structural Health Monitoring Techniques
- Hydraulic flow and structures
- Aerospace and Aviation Technology
- Herpesvirus Infections and Treatments
- Composite Structure Analysis and Optimization
- Micro and Nano Robotics
- Tunneling and Rock Mechanics
- Lattice Boltzmann Simulation Studies
- T-cell and Retrovirus Studies
- Animal Disease Management and Epidemiology
Nagasaki University
2021-2022
Kyushu University
2015-2020
Ogaki Municipal Hospital
2017-2020
Nippon Bunri University
2007-2012
Kyushu Institute of Technology
2008-2009
Nagoya University
1981
Osaka University
1981
Teikyo Heisei University
1981
Experimental and numerical studies are conducted on the aerodynamic characteristics of a flapping wing an insect in forward flight. Unsteady forces flow patterns measured using dynamically scaled mechanical model water tunnel. The design is based bumblebee. also computed three-dimensional Navier-Stokes code. Comparisons between experimental results show good agreement time histories both hovering Aerodynamic mechanisms flight, such as delayed stall, rotational effect, wake capture examined...
A soluble varicella virus antigen for skin testing was developed using culture fluid from varicella-zoster virus-infected human diploid cells. The centrifuged at a high speed (100,000 g 2 hr) to remove viral particles, and the supernatant, after heating 56 C 30 min, used as test antigen. No virion or nucleocapsid found by electron microscopy, very little 3 H-labeled DNA in hybridized with DNA. By immunoprecipitation, sodium dodecyl sulfate-polyacrylamide gel electrophoresis, fluorography,...
The effects of the phase difference between fore- and hindwings are experimentally investigated on aerodynamic force, efficiency, longitudinal control forces for tandem flapping wings in hovering forward flight. force power measured using a dynamically scaled mechanical model water tunnel at Reynolds number 7660–11,400. experimental results indicate that configuration, except in-phase motion, is detrimental to generation vertical horizontal slow flight; whereas enhanced out-of-phase motion...
The effects of wing kinematics on the aerodynamic characteristics a flapping insect are investigated experimentally. time-varying forces acting measured in hovering and forward flight using dynamically scaledmechanicalmodel awater tunnel, which simulates bumblebee flight. Wing can be categorized as trapezoidal or sinusoidal types. motion is divided into translational reversal phases, feathering fixed-angle rotational phases. In type, time histories angles for motions represented functions....
This study proposes a new damage identification method based on topology optimization, combined with visualized ultrasonic wave propagation. Although moving diagram of traveling waves aids in detection, it is difficult to acquire quantitative information about the damage, for which optimization suitable. In this approach, parameter, varying Young’s modulus, represents state finite element model. The feature propagation (e.g., maximum amplitude map study) inversely reproduced model by...
Abstract Insects have acquired various types of wings over their course evolution and become the most successful terrestrial animals. Consequently, essence excellent environmental adaptability locomotive ability should be clarified; a simple versatile method to artificially reproduce complex structure functions these innumerable is necessary. This study presents integral forming for an insect-wing-type composite by 3D printing wing frames directly onto thin films. The artificial venation...
We have developed a tailless, two-winged flapping drone with full span length of 180 mm and total weight 20.5 g.The is characterized by three biomimetic techniques: an anisotropic vein pattern reinforcing the wing surfaces, elastic mechanism, gravity center position control in abdomen.On basis experimental numerical results, wings are reinforced made carbon fiber-reinforced plastic (CFRP) laminate to passively provide appropriate aeroelastic deformation positively utilize snap-though...
The effect of configuration quasi-unidirectional woven fabric on the compressive failure modes quasi-isotropic composite laminates was investigated in this study. Two kinds out-of-plane fiber waviness were formed due to different fabrics and measured using a fast Fourier transform method. identified experimental numerical methods. It found that strength laminate fabricated long-pitch weft greater than standard-pitch fabrics. relationship between parametrical study, four found: axial...
In this paper, a combination of experimentation and analysis is used to study the effect micro in-plane fiber waviness on compressive properties unidirectional fabric composites. The experimental part includes measurement in two types fabrics, manufacturing composites with each via VaRTM process tests for establishing modulus strengths were confirmed be affected by waviness, but was not. Furthermore, two-dimensional numerical model proposed explain our results. results indicate that tensile...
A brimmed diffuser for a wind turbine, also known as lens, is ring-like short duct that installed around rotor. It gathers and accelerates to improve the power generation efficiency from this effect results vortex shedding intentionally generated by brim. However, periodic can induce vibration in lens structure, which could potentially harm it case where resonance occurs when frequency corresponds natural of structure. In study, we investigated fundamental mechanism vortex-induced (VIV)...
Introduction: Although ablation therapy for cardiac arrhythmias has made a huge progress in terms of efficacy and safety the past decade, major complications are still present.Purpose: Since limited data exist regarding burden trends adverse outcomes therapy, our aim was to evaluate incidence occurring during electrophysiological studies procedures.Methods: In prospective study we involved all patients undergoing diagnostic procedure electrophysiology laboratory between January 2013 December...
We experimentally investigate unsteady aerodynamic mechanisms of insect flapping wings. Measurements forces and flow visualization around the wing using PIV are conducted with dynamically scaled mechanical models in a water tunnel, which simulates hovering forward flights. clarify effects three aerodynamics on characteristics wing: delayed stall, rotational circulation, wake capture. The contribution stall to total lift accounts for about 90%. feathering rotation during translation...
The stability and control capability of a dragonfly-type Micro Aerial Vehicle (MAV) which employs resonance-type flapping wings has been studied using an experimental model flight simulation technique. is designed to be supported at its CG position with pitch roll freedoms. forces needed keep the motions stable are generated by changing frequency each wing (four wings, namely, right- left-, fore- hind-wings) that activated four motors. We employed two different types attitude sensors,...
An experimental study of the aerodynamic characteristics 3-dimensional flapping wing in hovering flight is conducted wide range parameters, which are Reynolds number, reduced frequency and planforms.Lift power measured on scaled wings, mimic bumblebee cicada delta wings with different locations maximum chord.The results show that lift power(1)are almost unchanged Re=800-5000,(2)increase as increases, although effeciency colnstant, and(3)increase location chord moves from base to tip, decreases.
Abstract Background Sick sinus syndrome (SSS) and atrial fibrillation (AF) frequently coexist interact to initiate perpetuate each other. Several retrospective or small cohort studies have suggested that successful catheter ablation of AF may help waive device implantations in patients with paroxysmal plus SSS, however, no prospective large are so far available on this scenario. Purpose We aimed elucidate the implantation-free survival after coexisting SSS a large-scale registry. also...
Mechanical properties of semi-crystalline polymers and composites with a thermoplastic matrix are highly dependent on the crystallinity crystalline morphology. The cooling rate from melt has greatest effect this along other processing conditions. objective study is to evaluate effects mode I II fracture toughnesses matrix. Carbon fiber/polyphenylene sulfide (CF/PPS) were fabricated using varying rates. These rates ranged 1 300ºC/min. degree in CF/PPS was determined differential scanning...
The fundamental aeroelastic effect of the corrugation an insect-sized simple flapping wing is numerically investigated. A baseline model for a corrugated constructed such that balance among aerodynamic, elastic, and inertial forces acting on matches insect wings in accordance with measured material properties wings. thickness airfoil amplitude are systematically varied around to modulate both natural frequencies mode shapes. Unsteady simulation based three-dimensional Naiver–Stokes equations...
We propose a flapping wing type micropump, which is categorized as velocity pump. The kinematics of the consists heaving and pitching motions like insects. Two dimensional computational fluid dynamics for micropump conducted to assess no load flow performance pump optimize kinematics. numerical results indicate that shows high rate when motion has larger amplitude. In this case, utilizes interaction between pipe wall enhance velocity, similar “clap-and-fling” effect by pair wings an insect.