Jellyfish-Inspired Soft Robot Gripper Grasps Fragile Objects

Biomimicry means 'to imitate life' or 'design inspired by nature,' applicable across disciplines from manufacturing to art. A foundational principle is that life creates conditions for life through circular systems—when a tree dies, it enables mushroom growth, whose mycelial network supports more trees. This circularity means resources continuously feed back, similar to compound interest. The circular economy applies this principle through three ideas: minimizing waste/pollution, keeping materials in use indefinitely, and regenerating natural systems. This contrasts with linear models focused on short-term consumption and landfills.

Biomimicry is innovation inspired by nature, examining three levels: elegant energy-efficient designs, life-friendly processes, and ecosystem strategies. The methodology includes design challenges for hands-on learning, nature observation, biological literature research, and innovation matchmaking. Case studies demonstrate practical applications: a mosquito control device mimics pitcher plant trapping mechanisms, a passive building cooling system combines cactus-inspired shading, termite ventilation, and evaporation techniques, and anaerobic wastewater treatment replicates cow stomach digestion. These solutions address global challenges including climate change and resource depletion while providing inherently regenerative and resilient approaches aligned with sustainability goals.

Biomimicry is the search for efficient design in the natural world. Nature serves as a vast classroom offering countless lessons for human innovation. The video introduces key examples: owl-inspired stealth technology, kingfisher-inspired bullet train design, and V-formation flight for fuel efficiency. The purpose of engineering is to make life easier, safer, and more comfortable, but many engineering products require years of research. Nature has already solved many challenges that humans face, making it an invaluable resource for technological innovation.

Biomimicry is defined as the process of looking at something like a leaf and trying to figure out how to make a better solar cell. It has become popular in design disciplines because people are seeking more sustainable ways to do things. Organisms have learned through 3.8 billion years of evolution what works and what is appropriate on the planet, making this knowledge valuable for redesigning our world. The most important principle is recognizing that a sustainable world already exists, and answers to sustainability questions are all around us in nature.

Biomimicry offers a paradigm shift from sustainable to restorative design by learning from nature's 3.8 billion years of R&D. Nature achieves radical resource efficiency through evolved adaptations: blue morpho butterflies use structural coloration instead of toxic pigments, bark beetles detect fires at 80km (vs 10m for human detectors), and rainforest plants focus diffuse light through microscopic lenses. The three fundamental challenges for humanity are achieving radical resource efficiency, shifting to closed-loop models, and transitioning to a solar economy. Creating breakthrough sustainable buildings requires starting with minimal briefs and assembling multidisciplinary teams including biologists. The design process begins by identifying goals: minimum 10% productivity increase, passive heating/cooling, complete daylighting, net energy production, and cleaner exhaust air. Daylight emerges as the primary driver of architectural form. Biological research reveals sophisticated light-gathering strategies: spookfish mirror eyes focus bioluminescence, stone plants channel light through underground stems, and brittle stars use skin lenses for predator detection. The solution involves undulating building forms ensuring no point exceeds 6 meters from windows, tapering structures to bring light downward, and installing central light reflectors. Structural optimization follows biological principles where materials are expensive while design is cheap—bird skulls combine dome and space frame technology in thin bone layers, while cuttlebone uses undulating walls for stiffness and lightness. Ground coupling provides passive temperature regulation, utilized by ground-dwelling animals and mastered by termites maintaining egg-laying chambers at ±0.5°C despite external 40°C variations. Murray's law governs branching biological systems with consistent diameter and angle proportions representing evolved minimum energy solutions. For facades, daylight should be valued above electricity—admitting exact light amounts while converting surplus to electricity. Moving photovoltaics between two positions is cheaper than full-range movement; biological examples include sensitive plants, iris folding, and beetle wing patterns. Cold-formed bending glass technology produces curved, frameless glazing elements using half the glass of conventional solutions. Studies show 20% productivity increases in daylight-rich environments, with 10% productivity gains paying for buildings in 3 years. NASA research identifies three plants for indoor air purification: money plant oxygenates daytime, mother-in-law's tongue produces nighttime oxygen, and ara palm removes VOCs. Biophilia theory suggests humans evolved in natural environments, making contact with nature improve physical health. Mature ecosystems operate on closed-loop principles cycling water, carbon, and nitrogen without waste, contrasting with human-made systems that are simple, disconnected, linear, and wasteful. The cardboard-to-caviar project demonstrates closed-loop principles: cardboard becomes horse bedding, then worm compost producing worms fed to sturgeon yielding caviar returned to restaurants. This evolved to include people with disabilities shredding cardboard, reforming addicts working in fish farming (65% success vs 95% rehab failure), and using treated sewage sludge for willow biomass heating. Such systems reintegrate underutilized human resources while boosting biodiversity.

This module introduces pneumatic and hydraulic actuation systems as essential components in mechatronics for automation purposes. These systems are widely used in industrial automation to perform work tasks. The module covers the meaning of hydraulic and pneumatic systems, their applications, basic components, circuit design for specific applications, and the selection criteria between pneumatic and hydraulic systems for particular applications. The contents include classification of valves (pressure relief valves, pressure regulating valves, pressure reducing valves), actuators (cylinders and rotary actuators), and the principles of DCV (Direction Control Valve) and FCV (Flow Control Valve).

Hydraulic and pneumatic actuation systems are control system components that convert electrical signals into mechanical movements (linear or angular). Hydraulic power supply units consist of a reservoir, pump, non-return valve, pressure relief valve, and accumulator to provide regulated liquid power, while pneumatic systems use compressors, filters, silencers, coolers, and air receivers for compressed air delivery. Linear actuators include single-acting cylinders (powered on one side with spring return) and double-acting cylinders (powered on both sides), while rotary actuators produce rotational motion. Valves control fluid direction and pressure, with poppet valves allowing one-way flow, spool valves controlling multi-port switching, and pressure control valves (relief, regulating, and sequencing types) maintaining safe operating pressures.

Actuators are the movement components in pneumatic and hydraulic systems. Pneumatic actuators use compressed air (gas) while hydraulic actuators use hydraulic oil (liquid). Both achieve similar results but serve different applications. Pneumatic actuators, commonly called 'pistons,' have advance and return chambers. When the advance chamber fills, the actuator moves forward; when the return chamber fills, it moves backward, often assisted by a spring. The choice between pneumatic and hydraulic systems depends on force requirements, precision needs, and application-specific considerations.

Hydraulic actuators use oil pressure while pneumatic actuators use air pressure to create mechanical movement. Both systems consist of a reservoir, pump, valve, and piston-cylinder assembly. The pump forces fluid into one side of the cylinder, pushing the piston in that direction while fluid exits through the opposite side and returns to the reservoir via the valve. These systems can move pistons in both directions by reversing the pump or changing valve orientation. Gravity can sometimes be used to return components instead of reversing the pump. Common applications include construction equipment like backhoes and forklifts, as well as power steering systems in vehicles.

There are three basic types of actuation: pneumatic actuators, hydraulic actuators, and electric actuators. Pneumatic actuators use air pressure to produce motion and are probably the most common type used in process systems. Hydraulic actuators are powered by pressurized liquid such as hydraulic fluid and are usually more powerful than pneumatic actuators of the same size. Electric actuators use electricity to produce motion and usually fall into two general classifications: solenoid actuators or motor-driven actuators (often referred to as motor operators).

Mechanics is essential for national exam success, requiring consistent practice and deep understanding. Before beginning, students must master foundational concepts. The first major concept is weight force (Poids), the gravitational force acting on a body, always directed downward toward Earth's center with its point of application at the center of inertia. The magnitude is P = m × g, where m is mass in kilograms and g is approximately 9.8 N/kg. Contact forces are equally important: the normal force (Réaction du support) is the reaction force exerted by a surface on a body in contact with it, always perpendicular to the surface and directed upward when there is no friction. When friction exists, the friction force acts parallel to the surface and opposite to the direction of motion. These forces can be decomposed into tangential and normal components. Understanding these forces is crucial for analyzing motion on surfaces with or without friction.

This segment covers the foundational mechanics of generating power in tennis. The key principles include: (1) Contact point position determines body action—hitting closer to your feet generates more power than hitting too far in front; (2) At the end of your motion, your racket should point directly toward your target; (3) Rather than trying to generate pace through arm speed, engage your entire body to create power; (4) Avoid blocking your arm—instead, let it move forward naturally while your body follows. These principles establish the foundation for effective tennis technique.

Tire camber is the angle of wheel mounting relative to the vertical axis, with neutral camber meaning perfect alignment, positive camber pointing outward, and negative camber pointing inward. The contact patch is the flattened rubber area meeting the track surface, compressed by the car's weight. Larger contact patches provide better grip, traction, and reduce wear/heat by spreading load over more rubber. F1 tires are wide to maximize this effect. During cornering, high lateral forces cause load transfer to outside tires and body roll, tilting tires away from the track and reducing effective contact patches. Negative camber compensates for this by allowing tires to maintain larger contact patches during cornering, maximizing traction consistency despite some tread deformation.

Quality of contact depends on the low point of the swing circle (angle of attack). For irons, golfers should hit 4+ degrees down to control launch and spin. Swing direction is the actual club path, which combines with angle of attack to determine ball flight. The head should drop 3.5-4 inches at position 5 (lead arm parallel) to ensure proper contact. Spine extension (natural thoracic spine extension) differs from vertical lift (moving away from the ball). Rotation combines horizontal and vertical movement; staying vertical without dropping causes pushing. Landing closed (club behind the ball) and pushing back creates better swing path. The Greg Norman drill (standing on left foot, wider stance, swinging to the right with right foot going back) teaches proper side bend and swing path. Club path is the mixture of angle of attack and swing direction. Ben Hogan used closed stances for drivers (to build rightward swing direction for slight fade) and open stances for irons (to pull path out and neutralize).

Contact is a word-solving game where one person (the blocker) is against everyone else. Players try to figure out a word letter-by-letter, starting from the front to the end. The only way to figure out the letters is to telepathically connect with teammates and guess the same word at the same time. If the blocker says 'contact' when someone guesses correctly, they are blocked. If the blocker doesn't say contact, the guess is accepted and the next letter is revealed. This game requires strategic thinking, team coordination, and vocabulary knowledge.