The former MLB slugger weighs in on Newtonian physics.

There are some strange places around the world where objects appear to roll uphill against gravity.

New study sheds light on the illusion and athleticism behind Michael Jackson's 'Smooth Criminal' tilt.

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Photographer Seth Casteel casts his lens on the priceless expressions of rescue cats and kittens bounding and jumping through the air.

NCSA's Suite of Recruiting Solutions to be Integrated into Zero Gravity Basketball Tournaments and Showcases

The game device for a user including a flexible closure for receiving impacts from the user, one or more filler placed inside the flexible closure for reducing recoiling of the flexible closure from the surface on receiving impacts, a mechanical unit attached to the inner walls of the flexible closure and a gravity slowing unit attached to the mechanical unit for reducing the gravitational pull acting on the flexible closure. The mechanical unit includes an electric motor for providing torque, an impact sensor for sensing the impacts received from the user, and a power source for energizing the electric motor and the impact sensor. The gravity slowing unit includes a spring-loaded hinge for stabilizing the flexible closure from impacts projected by the user, a spring-loaded shaft connected to the electric motor through the spring-loaded hinge for rotating to rotate on receiving torque from the electric motor and at least one set of propellers connected to the spring-loaded shaft for the receiving torque and providing thrust against gravitational pull acting on the flexible closure.

A steam assisted gravity drainage process that includes the addition of oxygen for recovering hydrocarbons from a hydrocarbon reservoir is described. Steam and an oxygen-containing gas are separately and continuously injected into the hydrocarbon reservoir to heat hydrocarbons and water to drain, by gravity, to a horizontal production well. The process can include controlling the ratio of oxygen and steam from about 0.05 to about 1.00 (v/v). The steam assisted gravity drainage process can further include removing non-condensable combustion gases from the reservoir to avoid undesirable pressures in the reservoir. The non-condensable combustion gases can be removed from the reservoir by at least one separate vent-gas well.

Apparatus and method for gravity-augmented preload of drive wheels in a monorail vehicle travelling along a guide rail bearing and contact surfaces that are non-parallel with the gravity vector. The vehicle has a structure defining a pivot location against the bearing surface, as well as first and second assemblies for engaging the rail on the bearing and contact surfaces, respectively. The vehicle is mounted so its center of gravity is at a rear longitudinal offset rrl from the pivot location and a vertical offset rvert from the guide rail. A force and moment balance thus created in a normal load on a drive wheel engaged with the bearing surface at the pivot location, where the load value exceeds a standard normal load generated by the mass of the monorail vehicle alone.

Monorail vehicle that travels on a non-featured rail with substantial profile variation and controls roll attitude, lateral location, and loading through judicious placement of the vehicle's center of gravity without using springs or suspensions. The vehicle has a bogie for engaging the non-featured rail so the center of gravity has a lateral offset r1 from the rail centerline to produce a roll moment Nr determined by vehicle's mass and value of r1. The center of gravity also has a vertical offset r2. The bogie uses first and second assemblies for engaging the rail to produce a pair of surface normal reaction forces to thus control roll attitude and loading by the placement of the center of gravity, thereby enabling accurate alignment of the monorail vehicle.

The embodiments described herein relate to methods and apparatus for counter-gravity formation of BMG-containing hollow parts. In one embodiment, the BMG-containing hollow parts may be formed by first feeding a molten metal alloy in a counter-gravity direction into a mold cavity to deposit the molten metal alloy on a surface of the mold cavity and then solidifying the deposited molten metal alloy.

A gravity actuated torque generator for generating torque to run a generator by continually adding weights to the apparatus. The gravity actuated torque generator includes a support assembly, a drive assembly being supported by the support assembly, and a weight assembly being engagable to the drive assembly while moving downwardly due to gravitational forces for generating torque.

A device for generating rotational movement which includes an output shaft supported for rotational movement and at least two one-way clutch mechanisms attached to the output shaft. An inflatable piston (“infton”) assembly is associated with each one-way clutch mechanism and includes a weighted member, an inflatable bladder associated with the weighted member, at least one inlet valve associated with an interior of the inflatable bladder, at least one outlet valve associated with the interior of the inflatable bladder, and a chain associated with the weighted member and extending over and drivingly engaging the respective one-way clutch mechanism. A source of filling fluid supplies each inlet valve. The filling fluid has a density less than that of a buoyancy fluid surrounding the infton assembly. A control system is configured to control the inlet and outlet valves to facilitate filling and discharging of the inflatable bladders.

Gravity powered electrical energy generators, particularly for producing lighting is disclosed. The apparatus has a support frame (1, 30) in which a series of gears and a gear-driven generator (20) are mounted. The power to drive the most upstream gear (2) is provided by a weight suspended from a point to one side of the axis of rotation of gear (2). The drive gear of the furthest downstream gear has no teeth so that the final contact between the drive gear and the shaft of the generator (20) is frictional. The gear ratio of the final downstream gear is at least 25. When used for lighting, the apparatus may include one or more high brightness LEDs (40) mounted on the housing (30). By suitable choice of gear ratios, the device may produce thirty minutes of illumination while allowing a 10 kilogram weight to fall through a distance of 1.8 meters.

A gravity chute for articles, comprising a chute floor defining a conveying surface, wherein the conveying surface has a conveying angle of inclination pointing in a conveying direction, and comprising at least one side wall which laterally delimits the chute floor, wherein, in addition to the conveying angle of inclination, the conveying surface has a transverse angle of inclination directed transversely to the conveying direction and pointing to a side wall, wherein the side wall, to which the conveying surface runs at a transverse inclination, has first friction properties within a first region extending from the conveying surface to a height h, and has second friction properties within a second region extending above the height h, which differ from the first friction properties, the side wall being recessed within the first region with respect to the second region.

Alfonso Cuaron's lost in space thriller is an extraordinary white-knuckle ride featuring outstanding effects and a terrific performance from Sandra Bullock

Satellite images have captured a usually invisible phenomenon known as atmospheric gravity waves pulsing through clouds off Western Australia's north-west.

• Gravity Review
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• Gravity Spoiler Discussion (after the outro music). 

(SCALE Nanotech) ESA-backed researchers demonstrate the laser-propulsion of graphene sails in microgravity. The light sails use a scalable micro-membrane design that minimizes their mass and hence increases their thrust upon light irradiation. To demonstrate the new sail concept, the scientists gained access to ZARM Drop Tower. There, the sail prototypes were set in vacuum and microgravity, and 1W-lasers caused their acceleration up to 1 m/s2.

Gravity Renewables has acquired the 10.5-MW Dahowa Hydroelectric Project, located on the Batten Kill River in Greenwich, Washington County, N.Y.

NASA has awarded a $2 million grant to the Jet Propulsion Laboratory, The Aerospace Corp. — and Xplore, a Seattle-based space venture — to develop the design architecture for a far-out telescope array that would use the sun's gravitational field as a lens to focus on alien planets. The Phase III award from the NASA Innovative Advanced Concepts program, or NIAC, would cover two years of development work and could lead to the launch of a technology demonstration mission in the 2023-2024 time frame. Xplore's team will play a key role in designing the demonstration mission's spacecraft, which would be… Read More

npj Microgravity, Published online: 24 February 2020; doi:10.1038/s41526-020-0096-x

Michael Jackson

In the last few days, neurosurgeons Dr Sandeep Mohindra, Dr Manjul Tripathi and Dr Nishant S Yagnick, have all become mini celebrities at Chandigarh's Postgraduate Institute of Medical Education & Research (PGMIR). In between attending to OPD and other hospital duties, Mohindra and Yagnick have been fielding press questions, while Tripathi, currently in the UK pursuing a short course, has recorded a video to offer his version should the media approach. And, all this fuss is thanks to a 683-word paper that the trio submitted four weeks ago to The Journal of Neurosurgery which has been able to answer the question that many generations have pondered over: How did Michael Jackson manage his gravity-defying moves?

Blood on the Dance Floor
Mohindra, 45, and Tripathi, 39, have been working together for the last seven years. While Mohindra is an Additional Professor, Tripathi is an Assistant Professor and Yagnick, a registrar, has been with the institute for three years. Mohindra says the team of neurosurgeons at the institute had been reporting a lot of dance injuries — kids or amateur dancers coming in with spinal injuries from trying to copy dance moves off YouTube videos.

Dr Nishant S Yagnick and wife Shweta are amateur dancers, and regulars at contests and reallity shows

"While our textbooks have mechanisms of injury for certain sports or postures — say if you play cricket, this is the injury you are most prone to get, or this is how you will hurt yourself if you ride a bike without a helmet — not much research has been done in the field of dance. There are people turning on their heads and B-Boying, and when they come in with injuries, we wonder how they fractured these many vertebra in this specific way?"

The study began six months ago when Tripathi called in Yagnick, asking him to participate in a research to understand the bio-mechanics of certain moves. They zoomed in on MJ's anti-gravity lean which debuted in 1987.

Smooth Criminal
In the seventh minute of the video, Smooth Criminal, in which Jackson (then 29 years old), dressed in his trademark outfit, along with a group of dancers, leans forward — without bending his legs or taking any support — at an angle of 45 degrees. For the average human, this range is 20 degrees. "Medical science," says Mohindra, "fails when Jackson starts dancing."

The first thing that the trio found out was that a patent, registered under Jackson's name, made the move partially possible. "Along with fellow inventors, MJ developed a special shoe that had a slot in the heel. The triangular slot could engage a hitch member (a metallic peg, which emerged from the stage floor at just the right time), allowing the dancer to obtain the right amount of extra support to be able to lean forward beyond physiological limits. Alas, MJ's move was an illusionary trick." Yet, says Yagnick, even with this extra support, not everyone can do an MJ.

Dr Manjul Tripathi and Dr Sandeep Mohindra

Yagnick and his wife Shweta are both amateur dancers. While he has taken training in jazz and hip hop, his wife has added ballet, modern contemporary and Indian contemporary, to her repertoire. The couple regularly participates in reality shows, in fact in February they won a Punjab state-level contest. When the research idea was mooted, the couple tried to replicate the MJ lean, but realised that even with the support of the shoes, it was impossible. "We tried the angulation against the wall. Even when we held each other's feet and legs, we could not get his angulation," says Yagnick.

Speed Demon
There was then more to this. While studying various videos and trying to replicate the move, the doctors studied the muscles that come into play. To put it simply, when the human body leans forward, it's the core muscles (or the erector spinae muscles) that act like cables to support the suspended spinal column during the forward shift, preventing the body from toppling over. However, when the body leans further, the weight is transferred from the core to the to the ankle joints, "and strain is shifted to the Achilles tendon". The paper states: "This allows for a very limited degree of forward bending from the ankle joints, while keeping a stiff straight posture — unless you are Michael Jackson. Most trained dancers with strong core strength will reach a maximum of 25° to 30°..."

A] Drawings showing the "antigravity tilt" (>45° forward bend), the dance move introduced by Michael Jackson, in comparison to the normal limit of a human tilt (20° forward bend), as well as the conceptualized shoe designed by MJ and co-inventors. B] Shift of the fulcrum from the sacrum to the Achilles tendon in MJ's antigravity tilt; the pic on the right show MJ do the tilt in Smooth Criminal. Courtesy/Journal of Neurology

What then allowed Jackson to manage what few could? Several years of training and special exercises, not unlike perhaps what sprinters such as Usain Bolt perform daily. "If you see Bolt preparing for the 100 m dash, you will see the same forward bend," says Mohindra, adding, that for the most famous dancer in the world, the idea would have been to make his Achilles Tendon so strong that the two legs could hold his 60 kg weight when he shifted his weight on them. While the average tendon can hold 10k to 15 kg, for Jackson that weight almost doubled.

Heal The World
It could take months for a paper to get accepted by the Journal of Neurosurgery, but the curiosity of the gravity-defying lean is such that the journal's editor accepted it within 24 hours of submission. Not just that. Yagnick says they have been asked to continue the research with other dancers in order to understand where injuries originate and how some people, defy the spine. Hrithik Roshan, for instance, says Mohindra has scoliosis of spine i.e. an abnormal curve. "Yet, he is one of best dancers one has seen. He has, obviously trained his muscles to challenge these bio-mechanics."

Catch up on all the latest Mumbai news, crime news, current affairs, and also a complete guide on Mumbai from food to things to do and events across the city here. Also download the new mid-day Android and iOS apps to get latest updates

Beyond usual determinants of trade such as GDP, distance, contiguity, free trade areas and language, this analysis mainly focuses on the role of product market regulation stringency and heterogeneity, and on the role of employment protection.

The trumpeter captures his compatriot’s mischievous sense of humour and serious intent

Let's take a look at why the SaaS cohort is the apple of Wall Street's eye.

Let's take a look at why the SaaS cohort is the apple of Wall Street's eye.

Greater Sydney generates 23% of the Nation's GDP and will be a city of 8 million, up from 4 million, in the next 40 years.

Let's take a look at why the SaaS cohort is the apple of Wall Street's eye.

'I was able to open up the flower of life and find the real wave conjugations that we've been looking for, for 10,000 years,' Howard, 50, explained in his live TV interview.

JEFF POWELL: Bonetti's long battle with Alzheimers ended this Easter Sunday, at 78, and football is in mourning for a goalkeeper so acrobatic and gravity-defying that Chelsea did indeed call him The Cat.

In an unprecedented step, NASA tested a giant 21-foot mirror on its James Webb space telescope that is designed to observe a range of frequencies not currently seen by Hubble.

A foreign locale, bone-crunching scenes one after another and piling up choppers, instead of cars, do not make Baaghi 3 an entertaining film.

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Smith, Amber, 1982- author

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Like father, like son. Alfonso Cuarón talks about working with son Jonás on Gravity, his new film starring Sandra Bullock and George Clooney. The Y Tu Mamá También and Children of Men director also explains how he achieved the realistic CGI of outer space with the help of some robots and brand-new technology.

In the trailer for Independence Day: Resurgence, the alien spacecraft seems to rip buildings from the ground using gravitational force. Is that physically possible? Nope. But that didn't stop us from calculating the mass it would need in order to destroy Earth.

Richard Browning built the world's fastest personal jet suit. WIRED spoke with him to find out about the design process and engineering of a radical new form of transportation.

Harper, William L. (William Leonard), 1943-

Barker Library - TJ165.B47 2019

Hayden Library - QB331.P35 2019

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