dont be mean
be median or mode
damn math fandom bloggers
shut up we have a good range of jokes
this is our domain
guys we’re forgetting the point of this post and going off on a tangent
well i for one think math puns are pretty radical
math puns are the first sin of madness
cos then the imaginary starts seeming real
If Earth Had a Ring Like Saturn
Our planet is lucky enough to have a large moon orbiting not too far away, which makes for very pretty moonlit nights. But for spectacular skies it might almost be worth trading in our moon for a ring like Saturn’s.
In fact, the earth did once have a ring - as part of the formation of our moon, ironically enough. When the planet Thea crashed into the earth, a titanic amount of material was blown into space. This went into orbit around the earth, forming a ring until it all eventually coalesced into our present-day satellite. This only happened because the material was orbiting outside of earth’s Roche limit.
In 1848, the French mathematician Edouard Roche calculated that if a large satellite were to approach too closely to a planet, it would be torn apart by the planet’s gravitational forces. This happens because the gravitational attraction of a planet on a moon is not equal. The planet pulls more on the side of the moon closest to it and less on the side further away. If the moon gets too close, this unequal pull can become great enough to tear the moon apart. Every planet has what is called a Roche limit.
Some astronomers believe that Saturn’s rings are material that was unable to form into a moon because it lies within the planet’s Roche limit. The gravitational pull of Saturn prevents particles from clumping together to form a moon. Another idea popular among scientists suggests that during the time when Saturn was first forming, it had one or more moons just outside its Roche limit. The bigger a planet is, the more gravity it has. And the more gravity it has, the bigger its Roche limit is. So as Saturn grew larger, its Roche limit grew, too. The limit soon moved past the inner moons and these moons soon broke apart. The remnants of the destroyed moons eventually formed the magnificent rings we see today. There may still be large pieces of these ancient moons within the rings. They would be much smaller than their ancestors but a thousand times larger than a typical ring particle. Another theory suggests that a few hundred million years ago - at a time when the early ancestors of the dinosaurs were roaming Earth - Saturn may have had no rings at all. The rings formed when one or more small moons wandered too close to Saturn. When they got within the Roche limit, Saturn’s gravity ripped them apart. After millions of years of bumping against one another, the pieces of moon were ground into the tiny particles that form the rings today.
If we had rings in the same proportion to our planet that Saturn’s are to it, it is pretty easy to figure out what they would like like from different places on the earth. From the equator the rings would be passing directly overhead. Since you’d be looking in the same plane as the rings, all you would see is a bright line arching from horizon to horizon. Here is what the rings might look like from Quito, Ecuador:
If we travel just a little further north to Guatemala, the rings begin to spread across the sky. The earthlight illuminating the dark side of the moon is many times brighter than we are accustomed to, due to the increased sunlight being reflected from the rings.
From Washington, DC (at 38° latitude), the rings begin to sink below the horizon, though they would still be an awe-inspiring sight as they dominate the sky both day and night.
At the Arctic Circle, the rings barely reach above the horizon. Seen here from Nome, Alaska, the brilliant rings illuminate the barren landscape scarcely more than a full moon would. Unlike the sun or moon, however, the rings neither rise nor set… they are always visible, day or night, always in exactly the same place.
What about the giant perpetual shadows that rings would make across the face of the earth? Maybe there’d be rainbows but I’d rather have moon light than rings ::)
dont be mean
be median or mode
damn math fandom bloggers
(Source: fake-mermaid, via panda-chan)
The Euthanasia Coaster is a concept for a steel roller coaster designed to kill its passengers. In 2010, it was designed and made into a scale model by Julijonas Urbonas, a PhD candidate at the Royal College of Art in London. Urbonas, who has worked at an amusement park, stated that the goal of his concept roller coaster is to take lives “with elegance and euphoria.” It is a ride to the death. The seven loops or “inversions” put the human body under such stress that it causes the brain to be starved of oxygen, as the heart simply cannot push blood against the enormous g-forces. Even if it kills you, it is designed to still be a fun death. An honourable thought, if rather macabre.
I can make a rollercoaster that kills people too.
and I dont have my phd
19-Year-Old Student Develops Ocean Cleanup Array That Could Remove 7,250,000 Tons Of Plastic From the World’s Oceans
19-year-old Boyan Slat has unveiled plans to create an Ocean Cleanup Array that could remove 7,250,000 tons of plastic waste from the world’s oceans. The device consists of an anchored network of floating booms and processing platforms that could be dispatched to garbage patches around the world. Instead of moving through the ocean, the array would span the radius of a garbage patch, acting as a giant funnel. The angle of the booms would force plastic in the direction of the platforms, where it would be separated from plankton, filtered and stored for recycling.
Bursts of Brain Activity May Protect Against Alzheimer’s Disease
Evidence indicates that the accumulation of amyloid-beta proteins, which form the plaques found in the brains of Alzheimer’s patients, is critical for the development of Alzheimer’s disease, which impacts 5.4 million Americans. And not just the quantity, but also the quality of amyloid-beta peptides is crucial for Alzheimer’s initiation. The disease is triggered by an imbalance in two different amyloid species — in Alzheimer’s patients, there is a reduction in a relative level of healthy amyloid-beta 40 compared to 42.
Now Dr. Inna Slutsky of Tel Aviv University’s Sackler Faculty of Medicineand the Sagol School of Neuroscience, with postdoctoral fellow Dr. Iftach Dolev and PhD student Hilla Fogel, have uncovered two main features of the brain circuits that impact this crucial balance. The researchers have found that patterns of electrical pulses (called “spikes”) in the form of high-frequency bursts and the filtering properties of synapses are crucial to the regulation of the amyloid-beta 40/42 ratio. Synapses that transfer information in spike bursts improve the amyloid-beta 40/42 ratio.
This represents a major advance in understanding that brain circuits regulate composition of amyloid-beta proteins, showing that the disease is not just driven by genetic mutations, but by physiological mechanisms as well. Their findings were recently reported in the journal Nature Neuroscience.
Tipping the balance
High-frequency bursts in the brain are critical for brain plasticity, information processing, and memory encoding. To check the connection between spike patterns and the regulation of amyloid-beta 40/42 ratio, Dr. Dolev applied electrical pulses to the hippocampus, a brain region involved in learning and memory.
When increasing the rate of single pulses at low frequencies in rat hippocampal slices, levels of both amyloid-beta 42 and 40 grew, but the 40/42 ratio remained the same. However, when the same number of pulses was distributed in high-frequency bursts, researchers discovered an increased amyloid-beta 40 production. In addition, the researchers found that only synapses optimized to transfer encoded by bursts contributed towards tipping the balance in favor of amyloid-beta 40. Further investigations conducted by Fogel revealed that the connection between spiking patterns and the type of amyloid-beta produced could revolve around a protein called presenilin. “We hypothesize that changes in the temporal patterns of spikes in the hippocampus may trigger structural changes in the presenilin, leading to early memory impairments in people with sporadic Alzheimer’s,” explains Dr. Slutsky.
Behind the bursts
According to Dr. Slutsky, different kinds of environmental changes and experiences — including sensory and emotional experience — can modify the properties of synapses and change the spiking patterns in the brain. Previous research has suggested that a stimulant-rich environment could be a contributing factor in preventing the development of Alzheimer’s disease, much as crossword and similar puzzles appear to stimulate the brain and delay the onset of Alzheimer’s. In the recent study, the researchers discovered that changes in sensory experiences also regulate synaptic properties — leading to an increase in amyloid-beta 40.
In the next stage, Dr. Slutsky and her team are aiming to manipulate activity patterns in the specific hippocampal pathways of Alzheimer’s models to test if it can prevent the initiation of cognitive impairment. The ability to monitor dynamics of synaptic activity in humans would be a step forward early diagnosis of sporadic Alzheimer’s.
(Source: tastefullyoffensive, via quantum1342)
[leaves this here and backs away]
Fuck yes. Thank you.
holy shit that is one hell of a truth bomb
(Source: nevver, via youmustmakeyourheartstill)
cat that is a no
how do cats even work
- A cat can jump up to five times its own height in a single bound.
- The little tufts of hair in a cat’s ear that help keep out dirt direct sounds into the ear, and insulate the ears are called “ear furnishings.”
- The ability of a cat to find its way home is called “psi-traveling.” Experts think cats either use the angle of the sunlight to find their way or that cats have magnetized cells in their brains that act as compasses.
- One reason that kittens sleep so much is because a growth hormone is released only during sleep.
- A cat has 230 bones in its body. A human has 206. A cat has no collarbone, so it can fit through any opening the size of its head.
- A cat’s nose pad is ridged with a unique pattern, just like the fingerprint of a human.
- If they have ample water, cats can tolerate temperatures up to 133 °F.
- A cat’s heart beats nearly twice as fast as a human heart, at 110 to 140 beats a minute.
- Cats don’t have sweat glands over their bodies like humans do. Instead, they sweat only through their paws.
- The claws on the cat’s back paws aren’t as sharp as the claws on the front paws because the claws in the back don’t retract and, consequently, become worn.
- Cats make about 100 different sounds. Dogs make only about 10.
- Researchers are unsure exactly how a cat purrs. Most veterinarians believe that a cat purrs by vibrating vocal folds deep in the throat. To do this, a muscle in the larynx opens and closes the air passage about 25 times per second.
- A cat almost never meows at another cat, mostly just humans. Cats typically will spit, purr, and hiss at other cats.
- A cat’s back is extremely flexible because it has up to 53 loosely fitting vertebrae. Humans only have 34.
- Some cats have survived falls of over 65 feet (20 meters), due largely to their “righting reflex.” The eyes and balance organs in the inner ear tell it where it is in space so the cat can land on its feet. Even cats without a tail have this ability.
- A cat can travel at a top speed of approximately 31 mph (49 km) over a short distance.
- A cat’s hearing is better than a dog’s. And a cat can hear high-frequency sounds up to two octaves higher than a human.
- A cat’s brain is biologically more similar to a human brain than it is to a dog’s. Both humans and cats have identical regions in their brains that are responsible for emotions.
And that’s how cat’s work.