Articles tagged with Kinematics
Researchers found that babies' brains can process music from as young as three months of age, but spontaneous movements to music emerge later in the first year. Infants show enhanced auditory responses to 'music' compared to 'shuffled music', with significant movement increases seen at 12 months.
Researchers analyzed high-speed camera footage of skilled soccer players performing the scissors feint, revealing distinct movement characteristics that differ from less-skilled players. These include active distance regulation, strategic modulation of relative speed and efficient feint execution.
Researchers derive exact formulae to show that rotating Kaleidocycles can always be built from six or more hinged tetrahedra. The study provides a firm mathematical basis for understanding the famous moving origami mechanism.
Researchers analyzed downward climbing behaviors in 21 small-to-medium-sized arboreal mammal species to understand early primate evolution. They found primates used tail-first and side postures more often than non-primates, suggesting upright postures evolved to adapt to tree environments.
Researchers identified two fundamental coordination patterns in underwater dolphin kick, accounting for over 99% of movement across performance levels. Faster swimmers exhibited greater shoulder extension and increased lower trunk movement, enabling reduced water resistance and improved propulsion.
A study published in eLife reveals how kangaroos increase their hopping speeds without incurring an associated energetic cost. By adjusting their posture, kangaroos reduce tendon stress and energy storage, allowing them to maintain the same amount of net work at the ankle, regardless of speed.
A new AI framework uncovers simple, understandable rules governing complex dynamics in nature and technology. The AI generates equations that accurately describe complex systems, revealing hidden variables that govern their behavior. This approach offers scientists a new way to leverage AI for understanding complex systems.
Researchers found that smaller insect wing design, rather than flapping speed, enables them to generate lift and fly. The study showed proportionally longer wings and more force-efficient shape help the smallest species stay airborne.
Researchers have discovered that soft gels and lotions retain residual stress from the mixing process, affecting their behavior over time. The study reveals that common products like hair gel and shaving cream hold onto these stresses for longer periods than previously assumed.
Researchers at OIST introduce a mouse motion capture method using marker-based approach to track high-quality data on complex movements. The method avoids pitfalls associated with smaller animals, enabling detailed studies of neuroscientific and physiological foundations of mouse movement.
The Digits framework uses compressed air to produce shape changes, vibrations, and haptic feedback, offering a versatile platform for virtual reality and physical therapy. The device's modular design and pneumatic actuation enable adaptable and scalable control methods.
A CFD simulation method based on biological experimental data analyzed the aerodynamic performance of pigeons during different flight stages. The study found that pigeons enhance lift during takeoff by attaching leading-edge vortex earlier and maintain stable lift during leveling flight.
BEAMoCap simplifies 3D animation by eliminating marker suits using AI and machine vision. This reduces production timeline and increases creative flexibility for game developers and film animators.
The study analyzed swimmer movement using optical motion capture and found that the direction of jet flow between vortices around the foot shifted downward as swimming speed increased. This shift is hypothesized to enhance forward propulsion during up-kicking, suggesting a refined technique for underwater undulatory swimming.
A new study from the University of Kansas found significant differences in muscular power and strength among different football positions, with linemen having more body mass and quarterbacks having higher peak force. The research suggests position-specific training could optimize athletic performance.
Researchers found that silkworm moths scan pheromone sources by rotating their bodies while fanning, helping them detect odor plumes. The study offers valuable design principles for aerial robots, enabling more efficient search and localization of targets.
Researchers have developed a new system for full-body motion capture that leverages sensors within consumer mobile devices. The app, called MobilePoser, tracks a person's full-body pose and global translation in space in real time with advanced machine learning and physics-based optimization.
The International Society of Biomechanics provides recommendations for wearables-based motion capture technology, addressing sensor calibration and experimental protocols. The guidelines aim to improve accuracy and quality in human motion analysis applications.
Researchers found that socially assistive robots improved stroke rehabilitation outcomes by encouraging people to continue their treatment in a non-judgmental setting. Participants who used the robots showed significant improvements in kinematic and clinical measures, including smoothness of movement and upper-extremity assessments.
Researchers found an intermediate-mass black hole in star cluster IRS 13 near SgrA*, suggesting it could be a 'seed' for the central supermassive black hole. The discovery provides insights into the galaxy's evolution and the formation of intermediate-mass black holes.
A team of researchers developed EMOKINE software to measure the objective kinematic features of movements that express emotions. The software provides movement parameters from data sets at the touch of a button, allowing scientists to analyze emotional expression and intentions.
A new study published in Frontiers in Sports and Active Living found that resistance training before basketball practice has minimal to no effect on shooting performance. In fact, the only scenario where accuracy decreased was after upper-body training, but this decrease disappeared 30 minutes post-exercise completion.
Astronomers at Harvard University have discovered a tilted dark matter halo, explaining the Milky Way's warp and flare. The team used models to calculate star orbits within a warped, oblong dark matter halo, matching existing observations of a distorted galaxy.
A new study from the University of Kansas used motion capture technology to analyze the biomechanics of proficient free-throw shooters. Proficient shooters exhibited lower knee and center of mass peak and mean angular velocities, greater release height, and less forward trunk lean compared to nonproficient shooters.
Researchers used a novel method to study tectonic plate movement, finding two significant slowdowns in the South American plate over the past 15 million years. These events may have contributed to the widening of the Andes mountain range by causing unstable material to tear free and sink into the mantle.
Researchers found that the new law allowing goalkeepers to put one foot in front of the line improved their penalty diving performance. The study, led by Paulo Roberto Pereira Santiago, used 3D body reconstruction technology and motion capture to analyze dives.
Researchers developed a simple and accurate method for markerless gait analysis, combining RGB camera-based pose estimation with IMU sensor data. The new technique outperformed existing methods in measuring gait parameters and joint angles, showing significant promise for clinical settings and diverse applications.
A team of researchers from Korea investigated the dynamics of the p-Laplacian AC equation, finding that solutions maintain three criteria: phase separation, boundedness, and energy decay properties. They also identified an advantage of p-AC equation over classical Laplacian in adjusting interface sharpness.
A study published in Scientific Reports shows that individuals with extensive experience performing inverted movements, such as vertical dancing, can overcome the inversion effect in perceiving biological motion. This ability is crucial for survival and social interaction, but is impaired when movements are performed upside-down.
The study finds that galaxies with bigger bulges tend to spin perpendicular to filaments, while smaller-bulged galaxies spin parallel. Galaxy mergers cause spin flips as galaxies move along filaments.
Researchers developed a novel three-core optical fiber sensor to accurately measure both the magnitude and direction of spine curvature. The sensor offers advantages like low cost, high sensitivity, and small size, making it a promising tool for doctors to diagnose problems in spine curvature.
A newly developed wearable sensor patch worn on the neck may predict concussion risk in high-impact sports like American football or judo. The device detects sudden neck strain, such as whiplash, and has shown a strong positive correlation with results from sensors inside a test dummy.
Scientists at Chung-Ang University have pioneered a novel method for controlling microdroplet motion on solid surfaces using near-infrared light. This approach allows for more precise control than traditional thermal techniques and opens up new possibilities for applications in microfluidics, drug delivery, and self-cleaning surfaces.
A team of researchers from Shinshu University has developed a precise numerical model of butterfly flight dynamics, revealing the intricate relationship between wing movement and air flow. The study's findings have significant implications for designing micro air vehicles (MAVs), which could lead to breakthroughs in aerospace engineering.
A new algorithm provides accurate solutions that mimic natural human movement, reducing the risk of injury. The Pro-ISADE approach improves calculation speed while ensuring calculated joint angles are feasible for robotic use in daily activities like drinking water and brushing teeth.
Researchers at UTHealth found that exoskeleton-assisted rehabilitation can be beneficial for stroke survivors, correcting impaired walking patterns and increasing motor coordination. The study used the Ekso 1.1 exoskeleton to guide patients with chronic post-stroke hemiplegia or hemiparesis in a 10-15 session training program over thre...
Researchers created a model to predict when rivers crossing faults will abandon their channels, revealing a complex coupling between fault movement and river flow. The model can also estimate the rate of fault slip and sediment transport efficiency.
Researchers studied how spider webs employ power amplification to capture prey, achieving accelerations of up to 772.85 m/s2. This unique method offers advantages over human tools, such as the replaceability and long-range capabilities of spider webs.
Researchers have identified a brain area that rapidly senses spatial constraints, enabling instant orientation and navigation. The study uses advanced imaging technologies to decode the activity of millions of neurons in the occipital place area, which encodes scene geometry.
Two studies investigate perceptual decision making in rats and humans, showing that the brain compares incoming sensory evidence to express a decision as soon as it reaches a fixed boundary. The findings support the 'bounded integration' model, which explains how the nervous system accumulates information over time.
Möbius kaleidocycles are ring linkages that can be turned inside-out continuously, inspiring wonder in engineers and mathematicians. The objects have unique properties, such as a one-sided surface, and could be used for designing new mixing machines, energy transmitting devices, or robotic arms.
Scientists developed a new microscopy technique to track protein molecular motors with atomic-level precision and microsecond time resolution. The system achieved 1.3 angstrom localization precision at 1 millisecond time resolution, revealing details of the kinesin motor's motion.
Researchers identify five types of growth strata developed in different structures, suggesting a 'pair' of basement-involved fold-thrust belt and flexure basin controlled by flat subduction. Sediments record the history of the Yanshanian Movement and provide key evidence for tectonic property of Northeast continental margin.
A study has linked individual variation in biological motion perception to genetic factors, revealing a common genetic basis for heritable aspects of BM perception and autistic traits. Genetic influences account for up to 50% of individual variation in local kinematics processing, while environmental factors shape global configuration ...
Studies examined point-light displays of biological motion in twins, revealing individual variation tied to genetic factors; participants with higher autistic traits showed impaired local BM processing. A shared genetic basis may underlie both perception and autistic characteristics.
A team of computer scientists developed a novel computational system to aid the design and fabrication of wind-up toys. The new method automates the construction of intricate mechanical assemblies, resulting in more compact mechanisms that consume less energy.
Researchers investigated how runners adapt their running patterns to cope with shock-induced vibrations. Preliminary results suggest that the human body adjusts to stabilize energetics and protect the upper body, regardless of speed. Further research is needed to confirm these findings and develop strategies to prevent running injuries.
A study of 29 NCAA football players found that repetitive subconcussive head impacts caused significant changes in near point of convergence (NPC) ocular-motor function, particularly among high-impact players. After a 3-week rest period, NPC was normalized, suggesting potential for recovery from subclinical brain damage.
LinkEdit enables intuitive and predictable changes to planar linkage shape and motion, preserving critical features like walking gait. The software uses symbolic kinematics for efficient computation, allowing users to modify links, joints, and linkage size.
A team of researchers has designed a passive, low-tech prosthetic knee that delivers similar performance to high-end prosthetics for a few hundred dollars. The prototype mimics the ideal torque profile of able-bodied knees using simple mechanical elements like springs and dampers.
A recent study by evolutionary biologists at the University of Massachusetts Amherst shows that a mutation in a single gene during development can lead to different consequences, including changes in jaw shape and feeding strategies. This genetic variation predicts differences in feeding mechanics and alters skull structure.
Researchers studied cockroaches' gait patterns using kinematic phase analysis, revealing a substantial delay in the nervous system's response time. This finding suggests that periodic feedback systems might lead to more stable walking robots.
Researchers at Monash University and Scripps Institution of Oceanography developed a new mathematical scaling theory to explain the global motions of tectonic plates. The theory demonstrates that the velocities of plates and boundaries depend on subduction zone size and presence of subduction zone edges.
A Medical College study on pitching mound height provides insight into baseball injuries. The study found that pitchers using a 10-inch mound experience increased stress on the shoulder joint, leading to potential injuries such as rotator cuff tears or labrum damage.
A recent study found female athletes tend to land from a jump with a more flexed ankle and experience greater knee abduction and internal rotation compared to male athletes. This increased risk of non-contact ACL injury during landing may be explained by differences in joint motion and loads between women and men when fatigued.
A mechanical engineer at Purdue University and a civil engineer at Tel Aviv University have created new theorems that improve structure and machine design by combining kinematics and statics. This knowledge enables engineers to create safer structures and machines with better stability, potentially at lower cost.
Researchers found deficits in trunk and hip strength, hamstring flexibility, and back proprioception in golfers with a history of low-back pain. These findings can inform the development of injury prevention programs and exercise programs for golfers to prevent or rehabilitate low-back injuries.
Researchers discovered that jaw stiffness significantly impacts speech production, causing variability in motion as sounds are made. The study measured jaw stiffness and its effect on kinematic variability during speech production, revealing a relationship between the two.
The Cornell Reuleaux Collection, a repository of kinematic models developed by German engineer Franz Reuleaux, has been expanded into the Kinematic Models for Design Digital Library (K-MODDL). Users can interact with digital images and models to learn about machine design principles.
The discovery reveals how the kinesin motor generates motion along microtubule tracks, with a key role played by the neck linker. This understanding could lead to medical therapies targeting kinesin activity in cancer and neurodegenerative diseases.