Article
Multidisciplinary Sciences
Dai Owaki, Hitoshi Aonuma, Yasuhiro Sugimoto, Akio Ishiguro
Summary: Insects exhibit adaptive coordination of leg movement patterns in response to environmental changes, such as leg amputation, suggesting the presence of intrinsic neural connections that override mechanosensory feedback to maintain normal walking behavior.
SCIENTIFIC REPORTS
(2021)
Article
Engineering, Marine
Jiaxin Lu, Yang Lu, Ronghao Zhang, Junjie Wang, Zhengfei Tang
Summary: The propulsive wing has excellent aerodynamic performance and can significantly enhance UUV maneuverability in underwater environments. Numerical simulations are conducted to investigate hydrodynamic performance, efficiency, unsteady force, and wake evolution of a propulsive wing propulsor (PWP). Three-dimensional simulations are also used to analyze the spanwise effects on PWP hydrodynamic performance. The results show that the PWP achieves high hydrodynamic coefficients and delivers excellent performance, but experiences high-frequency fluctuations due to blade-shedding vortices.
Article
Food Science & Technology
Hussein Al-Moadhen, Jarrod C. Lees, Liselotte Pannier, Peter McGilchrist
Summary: The study found that grilled lamb leg cuts scored higher in tenderness, juiciness, flavor, and overall liking compared to roasted cuts. Grilled Knuckle, Outside flat, and Topside all had higher scores than their roast counterparts for most traits. The findings suggest that specific cooking methods can improve the sensory traits of lamb cuts and increase consumer satisfaction.
Article
Cell Biology
Maeva Luxey, Gabriela Stieger, Bianka Berki, Patrick Tschopp
Summary: The tetrapod limb has been widely studied to understand vertebrate pattern formation and evolutionary diversification. While the skeletal alterations have been well studied, less is known about the changes in the neuromuscular system. In this study, the researchers analyze the developing limb neuromuscular system of Silkie breed chicken to evaluate the degree of regulative crosstalk in the limb patterning process.
FRONTIERS IN CELL AND DEVELOPMENTAL BIOLOGY
(2023)
Article
Physics, Multidisciplinary
Xueguang Meng, Chengjian Deng, Dingsheng Wang, Shujie Jiang
Summary: This research uses numerical simulation to investigate the aerodynamic performance of a three-dimensional flapping-wing aircraft under different control parameters. The results show that factors such as flapping amplitude, vortex wake, up-flight speed, and wing-wing interaction affect the lift and efficiency of the aircraft. The findings provide important insights for understanding, designing, and optimizing jellyfish-like flying machines.
FRONTIERS IN PHYSICS
(2023)
Article
Engineering, Aerospace
Feng Deng, Haifeng Wang, Cheng Xue, Ning Qin
Summary: This paper presents a combined experimental and numerical investigation on the aerodynamic load reduction using steady blowing on the suction surface of a swept wing. The study reveals that upstream blowing causes a larger reduction in lift and bending moment compared to normal blowing. It is also found that the aerodynamic load reduction increases with the increase in jet momentum. The linear jet velocity distribution with the lowest blowing velocity at the outer end of the jet region achieves the maximum load reduction. Three key flow mechanisms related to load reduction are identified.
AEROSPACE SCIENCE AND TECHNOLOGY
(2022)
Article
Thermodynamics
Eike Tangermann, Gianantonio Ercolani, Markus Klein
Summary: This research reproduces the soaring flight of white storks using a biomimetic computational model, analyzing the flow around and through the wing tip cascade. The results are compared to measured data from free flying birds to evaluate the effectiveness of the re-engineered wing.
FLOW TURBULENCE AND COMBUSTION
(2022)
Article
Sport Sciences
Abdulkerim Darendeli, Hayri Ertan, Roger Maro Enoka
Summary: This study compared the activation levels of lower body muscles during overground running and treadmill running at different grades. The results showed that the activation level of thigh muscles was highest when running on the treadmill at 1% and 2% grades, while the activation level of shank muscles was highest when running at speeds of 2.92 and 4.58 m/s.
MEDICINE & SCIENCE IN SPORTS & EXERCISE
(2023)
Article
Engineering, Aerospace
Xiaowu Yang, Bifeng Song, Wenqing Yang, Dong Xue, Yang Pei, Xinyu Lang
Summary: The force-generation mechanism of a dovelike flapping-wing micro air vehicle was studied using numerical simulation and experiment. Digital image correlation technology was employed to measure the dynamic deformation of the wing, and the resulting data were used to analyze the aerodynamic and inertial forces. The study provided more insights into the unsteady aerodynamics of the flapping wing and showed good agreement between the experimental and calculated results.
CHINESE JOURNAL OF AERONAUTICS
(2022)
Article
Multidisciplinary Sciences
Kumiko Okino, Mitsuhiro Aoki, Masahiro Yamane, Chikashi Kohmura
Summary: The study found that the shear wave velocity of the lower leg muscles increased after sitting for 2 hours, but decreased after elevating the lower leg. This indicates a proportional relationship between sitting time and intramuscular pressure in the leg compartment. The increase in velocity may be due to fluid retention in the extracellular space of the compartment.
Article
Engineering, Aerospace
Yuanbo Dong, Bifeng Song, Dong Xue, Yuanbo Li, Wenqing Yang
Summary: This study investigates the aerodynamics of hummingbird wings during flapping flight, focusing on the role of flexible wings in efficient hovering. The results show that the leading edge vortex attached to the wing is stable during the downstroke but unstable and continuously shed during the upstroke. Significantly enhanced aerodynamic forces are found during the downstroke, along with a higher asymmetry in time-averaged vertical force between the two half strokes than previously reported. The study provides insights into the aerodynamics of hovering hummingbirds.
INTERNATIONAL JOURNAL OF AEROSPACE ENGINEERING
(2022)
Article
Engineering, Aerospace
Ibrahim Madan, Jiun-Jih Miau, Shabudin Bin Mat
Summary: This paper highlights the results and comparison of flow topology investigation above an unmanned combat aerial vehicle (UCAV) configuration, specifically the multidisciplinary design configuration (MULDICON). Flow visualization results show that at low angles of attack, flow separation occurs near the apex region, and a tip vortex is detected at the wing tip. At medium angles of attack, the flow separation moves further upstream with the formation of an apex vortex, and the magnitude of the tip vortex increases. at higher angles of attack, the intensity of the apex vortex increases and wing tip vortices shedding is observed. The configuration operates partially stalled at an angle of attack of 25 degrees and completely stalled at 30 degrees. The study results demonstrate that the configuration has a maximum lift coefficient of 0.8 (using the K-Omega-SST turbulence model) and 0.93 (using the Spalart-Allmaras turbulence model), and a maximum drag coefficient of 0.31 and 0.35, respectively, at an angle of attack of 25 degrees. Flow visualization results show that the modified leading edge leads to a single flow separation, reducing flow complexity.
INTERNATIONAL JOURNAL OF AEROSPACE ENGINEERING
(2023)
Article
Mechanics
Yulin Wang, Yingjie Wei, Cong Wang, Qian Yang, Xinyu Hu, Guilin Wang
Summary: The high-pressure capture wing (HCW) configuration improves the lift of the vehicle by increasing the wedge angle and forming a compression plane. The pressure ratio of the HCW-V configuration is nearly 60% higher than that of the HCW configuration. Numerical simulation results show that the HCW-V configuration improves the lift-to-drag ratio by more than 25%.
Article
Anesthesiology
Evgeni Rozenfeld, Asia Strinkovsky, Aharon S. Finestone, Leonid Kalichman
Summary: The study evaluated the inter- and intra-rater reliability of trigger point recognition in lower leg muscles, with results showing a wide range of inter- and intra-rater reliability for active trigger points, but overall reliability is high for trigger point evaluation.
Article
Engineering, Aerospace
Xijun Ke, Weiping Zhang, Jinhao Shi, Weidong Chen
Summary: This paper investigates the nonlinear hovering wingbeat dynamics and proposes a solution for cracking the highly coupled problem of two degrees of freedom. The numerical results have good consistency with measured data, and the adjustable rule of phase offset provides a useful way for bio-inspired flapping wing micro aerial vehicles.
AEROSPACE SCIENCE AND TECHNOLOGY
(2021)
