A5078667079- Aerospace and Aviation Technology
- Aerodynamics and Fluid Dynamics Research
- Computational Fluid Dynamics and Aerodynamics
- Fluid Dynamics and Turbulent Flows
- Biomimetic flight and propulsion mechanisms
- Aerospace Engineering and Control Systems
- Robotics and Sensor-Based Localization
- Aerospace Engineering and Energy Systems
- Vitamin K Research Studies
- Fluid Dynamics and Vibration Analysis
- Adrenal Hormones and Disorders
- Robotic Path Planning Algorithms
- Uterine Myomas and Treatments
- Genital Health and Disease
- Aerodynamics and Acoustics in Jet Flows
- Chronic Kidney Disease and Diabetes
- Electrolyte and hormonal disorders
- Combustion and Detonation Processes
- Gastroesophageal reflux and treatments
- Muscle and Compartmental Disorders
- Gastrointestinal Bleeding Diagnosis and Treatment
- Control and Dynamics of Mobile Robots
- Marine and environmental studies
- Endometriosis Research and Treatment
- Guidance and Control Systems
Kanazawa University
2024-2025
Frontier Aerospace Corporation (United States)
2024
Tohoku University
2013-2023
University of Maryland, College Park
2017
University of Occupational and Environmental Health Japan
1989
Food and Drug Administration
1980
Food and Drug Safety Center
1980
A computational study has been conducted on various airfoils to simulate flows at Reynolds numbers primarily between and provide understanding guidance for MAV other low-Reynolds-number designs. The fluid dynamics tool used in this is a Reynolds-averaged Navier–Stokes solver with Spalart–Allmaras turbulence model correlation-based laminar–turbulent boundary-layer transition model. investigated include NACA 0009, 0012 (conventional reversed configuration), Clark-Y, flat plate (1, 3, 5%...
Abstract Thrust changes near walls and the ground plane are influenced by rotor’s position in indoor flight environments. This study evaluates variations rotor thrust a corner, which includes one wall plane, as well vertex, involves two plane; these phenomena referred to corner vertex effects, respectively. Additionally, wake effect was visualised using laser sheet method, velocity measured with hot-wire probe. The change on side minimal, primarily depending effect. In effect, decreased 93%...
Summary Aim : To investigate the inhibitory effects on gastric acid secretion of three proton pump inhibitors, omeprazole, lansoprazole and rabeprazole, using a three‐way crossover design in healthy Helicobacter pylori ‐negative,S‐mephenytoin 4′‐hydroxylase (CYP2C19) homo‐ hetero‐extensive metabolizers. Methods Eight Japanese male volunteers were enrolled. After administration rabeprazole (10 mg/day), (30 mg/day) or omeprazole (20 intragastric pH monitoring was commenced from 24 h before...
Small multirotor unmanned aerial vehicles (UAVs) are suitable for surveillance or inspection operations, such as disaster site observations building inspections, they can hover. Therefore, engineers and associations plan to use them civilian applications. However, the payload capacity of current UAVs is too small carry heavy sensors batteries. Thus, improving by increasing number rotors has been considered achieve an increase in thrust a limited body size. Although, most rotor arrangements...
Observation of an active volcano is very important to determine a strategy for estimating its eruptive activity and providing residents with evacuation warning. However, it too dangerous humans install cameras during the status volcano. Furthermore, permanently installed might be damaged by eruptions, craters can emerge in unanticipated positions. To handle this situation, we proposed robotic observations volcanic area after eruption using multi-rotor UAV (unmanned aerial vehicle) small...
Wake visualizations and thrust measurements of a quadrotor model were conducted to clarify the relationship between wake flow structure in-ground effects. The adjacent rotor distance, height above ground, presence plate representing generic centerbody varied. Thrust decreased when lowering ground distance was over 2.2 times radius. Laser light sheet visualization showed structures. Furthermore, using particle image velocimetry an averaged vector map wakes fountain at center wake, which...
Multi-rotor unmanned aerial vehicles are unstable in headwind because of nose-up pitching moment generation and thrust degradation. Reducing the could enhance tolerance to wind improve cruise flight speed. In this study, a canted rotor configuration was proposed reduce uniform flow examined. The objective study is evaluate effect reduction by rotors. First, interactions between rotors quad-rotor were visualized using smoke wire method. Second, estimated based on isolated performance. Third,...
Multi-rotor unmanned aerial vehicles (UAVs) are used in various applications because they can hover and take off land vertically. Although useful for civilian applications, their cruise flight speeds limited owing to the generation of a pitching moment uniform flow. However, aerodynamic forces acting on multi-rotor UAVs have not been precisely examined. The effects body-yaw angle, body-pitch distance between rotors thrust flow important considerations when designing UAVs. Furthermore, rotor...
A new integrated filing system for endoscopic images has been developed, comprising a main image and subsystems located at different stations. hybrid made up of both digital analog devices was introduced to construct this that combines the merits two methods. Each subsystem provided with video processor, is equipped device, routine were recorded in device system. The use multi-input adapter enabled simultaneous input from 8 processors. Recorded magneto-optical disks make it possible recall...
In this study, we experimentally evaluated the hovering performance of shrouded rotors for small multi-rotor unmanned aerial vehicles (UAVs). a rotor, rotor is surrounded by round duct. This superior to normal open because it protects rotary wing, reduces noise, and improves performance. However, have not been used much in UAVs they increase weight UAV body. To design shroud that maintains at reduced weight, effects different shapes on We examined three components affect aerodynamic...
This study is a proposal of small UAV (Unmanned Aerial Vehicle) localization technique in GPS (Global Positioning System)-denied indoor environment using dropping type AR (Augmented Reality) markers. For the in-door flight UAV, self-localization important. However, most techniques are computationally expensive, such as SLAM (Simultaneous Localization and Mapping), it requires high-performance on-board computers. Thus, appropriate for to use augmented reality system because...
The prevalence of serious incidents involving small, unmanned multirotors may escalate when such devices are operated within densely populated regions. development system fault detection techniques is required to prevent flight-related mishaps. A method utilizing an ultrasonic anemometer detect damage the rotor blade tip a small multirotor has been introduced. This can by analyzing downwash speed, calculated incorporating extended Kalman filter. However, efficiency this approach in remained...
A single-use aircraft launch system using a small helium balloon concept was proposed to elevate the likelihood of successful high-altitude flight tests above 30 km. The system, capable carrying payload 0.5 kg, has been developed and reported. Completing within range 92 km, which represents maximum communication distance between airborne ground station for operational phase control, is imperative. Therefore, straightforward method simulating trajectories outlined determine windows suitable...
Small multirotor unmanned aerial vehicles (UAVs) are convenient for multiple applications because they can hover and vertically take off land. However, their posture in landing motion is unstable of ground effect. effect on small quadrotor UAVs has been unclear compared to that an isolated rotor. To examine the UAVs, we measured thrust a UAV model changing height from ground. In our experiment, confirmed was affected by at below three times rotor radius. Moreover, verified diagonal axis...
Once a volcano erupts, severe disasters might be caused by molten rock, ashes, pyroclastic flow, and debris flow. To keep neighborhood safety from these disasters, it is important to observe the volcano, conduct hazard predictions. However, when restricted area set in few kilometers radius around it, difficult obtain information inside area. Based on above situations, this study, we developed self-contained portable unmanned observation device that observes for long time. The includes some...