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The recent advances in state estimation, perception, and navigation algorithms have significantly contributed to the ubiquitous use of quadrotors for inspection, mapping, and aerial imaging. To further increase the versatility of quadrotors, recent works investigated the use of an adaptive morphology, which consists of modifying the shape of the vehicle during flight to suit a specific task or environment. However, these works either increase the complexity of the platform or decrease its controllability.

In this work, we propose a novel, simpler, yet effective morphing design for quadrotors consisting of a frame with four independently rotating arms that fold around the main frame. To guarantee stable flight at all times, we exploit an optimal control strategy that adapts on the ...

Per billion vehicle miles, 1,011 pedal cyclists are killed or seriously injured, in comparison to 26 car drivers. Around 75% of fatal or serious cyclist accidents occur in urban areas. Around half of the cyclist fatalities occur on rural roads. 75% happen at, or near, a road junction. Riding in the rain is more dangerous than riding in dry conditions for an obvious reason: slippery when wet. The road itself is slicker. Painted surfaces and metal road obstacles are like ice.

This project solves this problem and makes the city safe. This project is about building a manual adjusting protective cover from rain droplets that can be used on any frames for a cyclist to prevent accident during rain.

...

What happens when an astronaut gets sick? Current missions require that astronauts take medications with them from Earth. But many medications degrade over time, especially protein drugs, and the necessary stockpile takes up precious mass and volume on a spacecraft. With the push towards long-term human missions to the Moon and Mars, this model is not sustainable. Even on Earth, there are many people without access to critical medicines because regional production and distribution systems are lacking, especially in remote areas, resource-poor areas and in austere environments. Our solution is an “Astropharmacy” – an innovation that allows protein drugs to be produced “on demand,” even in the remote environment of space, using genes as templates for cellular or cell-free ...

Many peoples travel through jungles and cross a river for many reasons, like for research and hiking and many others. While doing so, many peoples get attacked by wildlife when passing by because peoples are not aware of which animals are nearby. Animal attacks have been identified as a major public health problem. "Unprovoked attacks occur when the animal approaches and attacks a person(s) who is the principle attractant, for example, predation on humans. In 1997, it was estimated that up to 2 million animal bites occur each year in the United States. Injuries caused by animal attacks result in thousands of fatalities worldwide every year. Some of the world's deadliest animals include mosquitoes.which are estimated to kill about ...

NASA inventors have developed a set of puncture self-healing materials comprised of commercially available, known self-healing polymer resin and additive blends. A range of puncture healing blends was developed by melt blending self-healing polymers with non-self-healing polymeric materials.

Benefits

Puncture healing capability of the melt blends improves at higher temperatures
Thermoplastic materials that can repeatedly and intrinsically self-heal without the need for foreign inserts or fillers (such as microencapsulated monomer)

Blend of self-healing polymer materials with high strength polymer resins potentially enables the materials to be used in structural, load bearing applications

Applications

Radiation shielding
Fuel tank liners
Healing layers in ballistic protection for armor, helmets and other personal protective equipment
Packaging material
Human ...

Currently, the bags don't have the best design for our back, because the design of those bags was made a long time ago and until now they were keeping the same parameters about where they had been sewn and its points of tension, I mean: the forces are converging and match with our body, directly with our back, shoulders, and neck. The design of the current bags is not the most accurate for our backs and they are very uncomfortable when you have to carry books, some electronics, or very heavy things, especially the mountain bag; or for long periods of time, as school backpacks! My solution is to make a new bag with a new design to help ...

Abstract: The proposed project concerns about a failure analysis of an electric aluminum alloy conductors damaged and broken for fretting fatigue phenomena induced by aeolian vibrations. Life of electric conductors is often reduced by various degradation mechanisms such as repeated bending, fluctuating tension, distortion, fatigue, wear and corrosion phenomena. However the main limiting factor of the electrical conductors is related to aeolian vibrations in the high frequency range (between 5 to 50 Hz). Conductor oscillations may lead to fretting fatigue problems caused by wind excitation, mainly in the suspension clamp regions, spacers or other fittings. The induced aluminium wire fracture imply a drastic reduction in the transmission line service. Vibration dampers are considered the most effective method to extend ...

Plastic shopping bags on land are one of the most common types of litter. Build ups of huge quantities of plastic bags are well known to block local drainage systems, especially in developing countries. For example, the floods in Bangladesh 20 years ago were partially attributed to blockages in drainage systems from plastic shopping bags. Plastic shopping bags also pose health risks to human populations over the years as they leach toxins into water supplies.

Plastic bags also are problematic to recycle. While the recyclable symbol of three arrows in a circle is on many plastic shopping bags in the US, it often is a marketing trick. There are no regulations about how that symbol is used, and every ...

The team ENENT believes that the efficiency of the existing systems could drastically be improved by inculcating innovative techniques into it. Following our vision, the team made an innovation power distribution device that saves 20%-25% of the electricity bills. The device shifts phases in milliseconds to prevent imbalance being created into the system. This reduce the excess energy losses during the distribution of power. The cost of the device is just $300 and the device can easily be plugged into a conventional power distribution system with minor modification. The price could on average be recovered in about 6-7 months of installation through electricity bill savings.

Apart from balancing loads and reducing electricity bills, the device also ensures that your ...

Over two billion people suffer from the effects of water scarcity and the vast majority of those affected live in coastal areas in developing countries and remote communities. Seawater desalination is an excellent potential solution, but desalination systems require a connection to a strong and reliable electrical grid for their power supply.

Because our target customers typically lack sufficient grid capacity and cannot afford the capital or time required to build and deploy grid-connected systems, Resolute Marine has devised a unique solution to this problem - the world’s first wave-driven desalination system (Wave2O™) that can be deployed quickly, operate completely “off-grid” and supply large quantities of clean fresh water at competitive cost.

Our solution has the unique advantage of ...

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