Profile

Cover photo
Verified name
Corina Marinescu
Lives in Milky Way Galaxy, 3rd Planet
42,555 followers|697,920,080 views
AboutPostsCollectionsVideosReviews
Corina's Collections

Stream

Corina Marinescu

Shared publicly  - 
 
10
Happy B-day kiddo!

#personalnonsense  
103

Corina Marinescu

Shared publicly  - 
 
Brain Modulyzer Provides Interactive Window Into the Brain
Did you know that your brain processes information in a hierarchy? As you are reading this page, the signal coming in through your eyes enters your brain through the thalamus, which organizes it. That information then goes on to the primary visual cortex at the back of the brain, where populations of neurons respond to very specific basic properties. For instance, one set of neurons might fire up because the text on your screen is black and another set might activate because there are vertical lines. This population will then trigger a secondary set of neurons that respond to more complex shapes like circles, and so on until you have a complete picture.

For the first time, a new tool developed at the Department of Energy’s (DOE’s) Lawrence Berkeley National Laboratory (Berkeley Lab) allows researchers to interactively explore the hierarchical processes that happen in the brain when it is resting or performing tasks. Scientists also hope that the tool can shed some light on how neurological diseases like Alzheimer’s spread throughout the brain.

Created in conjunction with computer scientists at University of California, Davis (UC Davis) and with input from neuroscientists at UC San Francisco (UCSF), the software, called Brain Modulyzer, combines multiple coordinated views of functional magnetic resonance imaging (fMRI) data—like heat maps, node link diagrams and anatomical views—to provide context for brain connectivity data.

Paper:
http://ieeexplore.ieee.org/document/7466855/?reload=true

Brain Modulyzer is now available on github:
https://github.com/sugeerth/BrainModulyzer/

Source & further reading:
http://newscenter.lbl.gov/2016/10/10/brain-modulyzer-provides-interactive-window-brain/ 

Image:
Brain Modulyzer combines multiple coordinated views—such as heat maps, node link diagrams and anatomical views—of functional magnetic resonance imaging (fMRI) data—like heat maps, node link diagrams and anatomical views—to provide context for brain connectivity data.
Credit: Sugeerth Murugesan, Berkeley Lab/UC Davis

#neuroscience   #brainmodulyzer   #neuroimaging   #research  
335
40
Bertrand Nelson's profile photo
 
Thank you for the sharing Corina.

Corina Marinescu

Shared publicly  - 
 
Layer Cake Sunset
On January 18 a tantalizing sunset was captured in this snapshot. Seemingly sliced into many horizontal layers the Sun shimmered moments before it touched the horizon, setting over the Pacific Ocean as seen from the mountaintop Las Campanas Observatory in Chile. Pink hues of filtered sunlight were created by the long sight-line through the hazy atmosphere.

But the remarkable layers correspond to low atmospheric layers of sharply different temperature and density also along the line of sight. Over a long path through each layer the rays of sunlight are refracted strongly and create different images or mirages of sections of the setting Sun.  

Image & info via APOD
https://apod.nasa.gov/apod/astropix.html
Image Credit & Copyright: Yuri Beletsky (Carnegie Las Campanas Observatory, TWAN)

#nasa   #naturalphenomena   #sunset   #space   #universe  
428
42
Viorel Racoviteanu's profile photoCorina Marinescu's profile photo
2 comments
 
Interesting...I thought that most “angel” echoes on radar were caused by birds. Besides, STC should automatically reduce the visibility of permanent echoes on the radar picture and increase the strength of those created by aircraft. Maybe is time to not rely on radars so much and simply invent something else.

Corina Marinescu

Shared publicly  - 
 
Lined chiton (Tonicella lineata)
The lined chiton is a species of chiton from the North Pacific. It has been recorded from intertidal and subtidal waters to a depth of 30 to 90 m. T. lineata often occurs on rocks that are encrusted by coralline algae; presumably this is what their coloration is intended to camouflage against. If knocked from its substrate, T. lineata will contract into a ball in order to protect its vulnerable ventral side, similar to many isopods. Coralline algae are also the major food item of T. lineata.

Photo via Wikipedia Commons
References:
http://www.afsc.noaa.gov/kodiak/photo/mistonicella.htm
http://www.centralcoastbiodiversity.org/lined-chiton-bull-tonicella-lineata.html

#coolcritters   #linedchiton   #marinelife   #biodiversity  
268
21
Boris Borcic's profile photogordon hoselton's profile photo
2 comments
 
unique , wow , natures designs......

Corina Marinescu

Shared publicly  - 
 
What is Planet Nine?
"Planet Nine" is an informal nickname for a predicted but undiscovered world that may exist in the outer solar system. It also has been called "Planet X".

Caltech researchers have found evidence of a giant planet tracing a bizarre, highly elongated orbit in the outer solar system. The object, which the researchers have nicknamed Planet Nine, has a mass about 10 times that of Earth and orbits about 20 times farther from the sun on average than does Neptune (which orbits the sun at an average distance of 2.8 billion miles). In fact, it would take this new planet between 10,000 and 20,000 years to make just one full orbit around the sun.

The researchers, Konstantin Batygin and Mike Brown, discovered the planet's existence through mathematical modeling and computer simulations but have not yet observed the object directly.

References:
https://solarsystem.nasa.gov/planetnine
https://solarsystem.nasa.gov/news/2016/01/21/caltech-researchers-find-evidence-of-a-real-ninth-planet

#infographic  on Planet Nine - potential rogue planet captured by our solar system.

#space   #planetnine   #nasa   #universe   #exploration  
657
108
Sam Collett's profile photo
 
Been nearly a year and still not found it, may have to wait till JWST before that happens

Corina Marinescu

Shared publicly  - 
 
Daphnis the Wavemaker
Plunging close to the outer edges of Saturn's rings, on January 16 the Cassini spacecraft captured this closest yet view of Daphnis. About 8 kilometers across and orbiting within the bright ring system's Keeler gap, the small moon is making waves. The 42-kilometer wide outer gap is foreshortened in the image by Cassini's viewing angle.

Raised by the influenced of the small moon's weak gravity as it crosses the frame from left to right, the waves are formed in the ring material at the edge of the gap. A faint wave-like trace of ring material is just visible trailing close behind Daphnis. Remarkable details on Daphnis can also be seen, including a narrow ridge around its equator, likely an accumulation of particles from the ring.

Image and info via APOD
https://apod.nasa.gov/apod/astropix.html
Image Credit: Cassini Imaging Team, SSI, JPL, ESA, NASA

#space   #nasa   #cassini   #daphnis   #saturn   #esa  
318
23

Corina Marinescu

Shared publicly  - 
 
Life cycles of stars
A star's life cycle is determined by its mass. The larger its mass, the shorter its life cycle. A star's mass is determined by the amount of matter that is available in its nebula, the giant cloud of gas and dust from which it was born. Over time, the hydrogen gas in the nebula is pulled together by gravity and it begins to spin.

As the gas spins faster, it heats up and becomes as a protostar. Eventually the temperature reaches 15,000,000 degrees and nuclear fusion occurs in the cloud's core. The cloud begins to glow brightly, contracts a little, and becomes stable. It is now a main sequence star and will remain in this stage, shining for millions to billions of years to come. This is the stage our Sun is at right now.
 
As the main sequence star glows, hydrogen in its core is converted into helium by nuclear fusion. When the hydrogen supply in the core begins to run out, and the star is no longer generating heat by nuclear fusion, the core becomes unstable and contracts. The outer shell of the star, which is still mostly hydrogen, starts to expand. As it expands, it cools and glows red. The star has now reached the red giant phase. It is red because it is cooler than it was in the main sequence star stage and it is a giant because the outer shell has expanded outward. In the core of the red giant, helium fuses into carbon.

All stars evolve the same way up to the red giant phase. The amount of mass a star has determines which of the following life cycle paths it will take from there.

For low mass stars, after the helium has fused into carbon, the core collapses again. As the core collapses, the outer layers of the star are expelled. A planetary nebula is formed by the outer layers. The core remains as a white dwarf and eventually cools to become a black dwarf.

High mass stars are born in nebulae and evolve and live in the Main Sequence. However their life cycles start to differ after the red giant phase. A massive star will undergo a supernova explosion. If the remnant of the explosion is 1.4 to about 3 times as massive as our Sun, it will become a neutron star. The core of a massive star that has more than roughly 3 times the mass of our Sun after the explosion will do something quite different. The force of gravity overcomes the nuclear forces which keep protons and neutrons from combining. The core is thus swallowed by its own gravity. It has now become a black hole which readily attracts any matter and energy that comes near it.

What happens between the red giant phase and the supernova explosion?
Once stars that are 5 times or more massive than our Sun reach the red giant phase, their core temperature increases as carbon atoms are formed from the fusion of helium atoms. Gravity continues to pull carbon atoms together as the temperature increases and additional fusion processes proceed, forming oxygen, nitrogen, and eventually iron.

When the core contains essentially just iron, fusion in the core ceases. This is because iron is the most compact and stable of all the elements. It takes more energy to break up the iron nucleus than that of any other element. Creating heavier elements through fusing of iron thus requires an input of energy rather than the release of energy. Since energy is no longer being radiated from the core, in less than a second, the star begins the final phase of gravitational collapse. The core temperature rises to over 100 billion degrees as the iron atoms are crushed together. The repulsive force between the nuclei overcomes the force of gravity, and the core recoils out from the heart of the star in a shock wave, which we see as a supernova explosion.

References:
http://www.schoolsobservatory.org.uk/astro/stars/lifecycle
http://www.telescope.org/pparc/res8.html
https://imagine.gsfc.nasa.gov/educators/lessons/xray_spectra/background-lifecycles.html

#universe   #space   #stars   #science    #nasa  
820
162
alain constantin's profile photogordon hoselton's profile photo
2 comments
 
Thank you,Corina , such a splendid , informative , understandable life cycle explanation...impressed over here..

Corina Marinescu

Shared publicly  - 
 
After a decade of parenting
What it's like to be a parent?
It's one of the hardest things you'll ever do but in exchange it teaches you the meaning of unconditional love.

#personalnonsense   #parenting   #nurseryofemotions  
240

Corina Marinescu

Shared publicly  - 
 
Flat spin
It's essential to keep moving, learning and evolving for as long as you're here and this world keeps spinning.

Work by Charlie Deck.

#animation   #processing   #spinning   #math  
700
128
Sam Collett's profile photo
 
Go too quickly and you get dizzy... important to relax and reflect from time to time

Corina Marinescu

Shared publicly  - 
 
Scientists Tissue-Engineer Part of Human Stomach in Laboratory
Scientists from Cincinnati Children’s Hospital Medical Center have used pluripotent stem cells to engineer human stomach tissues that produce acid and digestive enzymes. This, along with the ability to engineer the stomach’s hormone-producing region, the antrum, which the same team showed two years ago, will allow investigators to grow both parts of the human stomach to study disease, model new treatments and understand human development and health in ways never before possible.

The research is published online Jan. 4/2017 in Nature.
“Now that we can grow both antral- and corpus/fundic-type human gastric mini-organs, it’s possible to study how these human gastric tissues interact physiologically, respond differently to infection, injury and react to pharmacologic treatments,” said Jim Wells, PhD, principal investigator and director of the Pluripotent Stem Cell Facility at Cincinnati Children’s. “Diseases of the stomach impact millions of people in the United States and gastric cancer is the third leading cause of cancer-related deaths worldwide.”

Source & further reading:
https://www.cincinnatichildrens.org/news/release/2017/stem-cells-generate-human-stomach

Paper:
http://www.nature.com/nature/journal/v541/n7636/full/nature21021.html

Image: This confocal microscopic image shows tissue-engineered human stomach tissues from the corpus/fundus region, which produce acid and digestive enzymes.

#organogenesis   #endoderm   #research   #stemcells   #medicine   #health  
156
15

Corina Marinescu

Shared publicly  - 
 
The Elephant's Trunk Nebula in Cepheus 
Like an illustration in a galactic Just So Story, the Elephant's Trunk Nebula winds through the emission nebula and young star cluster complex IC 1396, in the high and far off constellation of Cepheus. Also known as vdB 142, the cosmic elephant's trunk is over 20 light-years long. This colorful close-up view includes image data from a narrow band filter that transmits the light from ionized hydrogen atoms in the region.

The resulting composite highlights the bright swept-back ridges that outline pockets of cool interstellar dust and gas. Such embedded, dark, tendril-shaped clouds contain the raw material for star formation and hide protostars within. Nearly 3,000 light-years distant, the relatively faint IC 1396 complex covers a large region on the sky, spanning over 5 degrees. This dramatic scene spans a 1 degree wide field, about the size of 2 Full Moons.

Image & info via APOD
https://apod.nasa.gov/apod/astropix.html
Image Credit & Copyright: Stephen Leshin

#space   #universe   #science   #nebula   #nasa  
437
20
Alan James's profile photo
 
I thanks for sharing +Corina Marinescu​

Corina Marinescu

Shared publicly  - 
 
2016 Sets Global Temperature Record
2016 was hotter than 2015, the previous record. And 2015 hotter than 2014, the previous record year.

These record temperatures are all part of a warming trend that dates back to the late-19th century, largely caused by human emissions of carbon dioxide and other gases into the atmosphere.

Source & further reading:
https://www.nasa.gov/sites/default/files/atoms/files/noaa-nasa_global_analysis-2016.pdf

#weather   #climatechange   #temperature   #science  
136
36
Alan James's profile photoMichael Ganzer's profile photoOwen Iverson's profile photoKnud Thirup's profile photo
6 comments
 
You are right + Corina M,(The action against clima change will be stronger!)
Places
Map of the places this user has livedMap of the places this user has livedMap of the places this user has lived
Currently
Milky Way Galaxy, 3rd Planet
Links
Other profiles
Story
Tagline
I am a collection of water, calcium and organic molecules, but not a single one of the cells that compose me knows who I am, or cares ...so why should you?
Basic Information
Gender
Female
Public - a month ago
reviewed a month ago
My favorite place! Fruit tarts are just amazing!!
Public - 3 years ago
reviewed 3 years ago