View allAll Photos Tagged peripherals
The Manœuvres video series is part of a body of works that I’ve been developing since 2016 based on observing the R&D of driverless cars and dash cam compilations.
La série Manœuvres fait partie d'un corpus qui s'inspire des technologies utilisées par les véhicules autonomes et des compilations d’enregistreurs de conduites (dash cams).
francois-quevillon.com/w/?p=1445&lang=fr
francois-quevillon.com/w/?p=1462
www.lafabriqueculturelle.tv/series/306/manoeuvres-de-fran...
My pulse rate is 79 to 80 beats per minute. 🌞
Baruch HaShem! !ברוך השם
Blessed is The Name!!
___________________________________
SpO2 Defined as Peripheral Oxygen Saturation
incenter.medical.philips.com/doclib/enc/fetch/586262/5864...
Introduction
The body's need for oxygen is certain. Its availability at a tissue level is some- times in doubt. Blood gas measurements provide critical information regard- ing oxygenation, ventilation, and acid-base status.
However, these measurements only provide a snapshot of the patient's condition taken at the time that the blood sample was drawn. It is well known that oxygenation can change very quickly. In the absence of continuous oxygenation monitoring, these changes may go undetected until it is too late.
Pulse oximeters measure blood oxygen saturation noninvasively and continuously.
What is SpO2?
A blood-oxygen saturation reading indicates the percentage of hemoglobin molecules in the arterial blood which are saturated with oxygen. The reading may be referred to as SaO2. Readings vary from 0 to 100%. Normal readings in a healthy adult, however, range from 94% to 100%.
The term SpO2 means the SaO2 measurement determined by pulse oximetry. As explained in the section "Considerations When Using Pulse Oximetry," under some circumstances pulse oximetry gives different readings, and the use of a different term indicates this.
How Does Pulse Oximetry Work?
Within the Sp02 sensor, light emitting diodes shine red and infrared light through the tissue. Most sensors work on extremities such as a finger, toe or ear. The blood, tissue and bone at the application site absorb much of the light. However, some light passes through the extremity. A light-sensitive detector opposite the light source receives it.
SpO2 Sensors
Most sensors work on extremities such as a finger, toe or ear. The sensor measures the amount of red and infrared light received by the detector and calcu- lates the amount absorbed. Much of it is absorbed by tissue, bone and venous blood, but these amounts do not change dramatically over short periods of time.
The amount of arterial blood does change over short periods of time due to pulsation (although there is some constant level of arterial blood). Because the arterial blood is usually the only light absorbing component which is changing over short periods of time, it can be isolated from the other compo- cents.
_______________________________________________
Oxygen Saturation As Presented in Wikipedia:
en.wikipedia.org/wiki/Oxygen_saturation_(medicine)
Oxygen saturation is a term referring to the fraction of oxygen-saturated hemoglobin relative to total hemoglobin (unsaturated + saturated) in the blood. The human body requires and regulates a very precise and specific balance of oxygen in the blood. Normal blood oxygen levels in humans are considered 95-100 percent. If the level is below 90 percent, it is considered low resulting in hypoxemia.[1] Blood oxygen levels below 80 percent may compromise organ function, such as the brain and heart, and should be promptly addressed. Continued low oxygen levels may lead to respiratory or cardiac arrest. Oxygen therapy may be used to assist in raising blood oxygen levels. Oxygenation occurs when oxygen molecules (O
2) enter the tissues of the body. For example, blood is oxygenated in the lungs, where oxygen molecules travel from the air and into the blood. Oxygenation is commonly used to refer to medical oxygen saturation.
Contents [hide]
1Definition
2Physiology
3Measurement
4Pulse oximetry
5Medical significance
6See also
7References
8External links
Definition[edit]
In medicine, oxygen saturation (SO2), commonly referred to as "sats," measures the percentage of hemoglobin binding sites in the bloodstream occupied by oxygen.[2] At low partial pressures of oxygen, most hemoglobin is deoxygenated. At around 90% (the value varies according to the clinical context) oxygen saturation increases according to an oxygen-hemoglobin dissociation curve and approaches 100% at partial oxygen pressures of >10 kPa. A pulse oximeter relies on the light absorption characteristics of saturated hemoglobin to give an indication of oxygen saturation.
Physiology
The body maintains a stable level of oxygen saturation for the most part by chemical processes of aerobic metabolism associated with breathing. Using the respiratory system, red blood cells, specifically the hemoglobin, gather oxygen in the lungs and distribute it to the rest of the body. The needs of the body's blood oxygen may fluctuate such as during exercise when more oxygen is required [3] or when living at higher altitudes. A blood cell is said to be "saturated" when carrying a normal amount of oxygen.[4] Both too high and too low levels can have adverse effects on the body.
Measurement[edit]
An SaO2 (arterial oxygen saturation, as determined by an arterial blood gas test[5]) value below 90% causes hypoxemia (which can also be caused by anemia). Hypoxemia due to low SaO2 is indicated by cyanosis. Oxygen saturation can be measured in different tissues:
Venous oxygen saturation (SvO2) is measured to see how much oxygen the body consumes. Under clinical treatment, a SvO2 below 60% indicates that the body is in lack of oxygen, and ischemic diseases occur. This measurement is often used under treatment with a heart-lung machine (extracorporeal circulation), and can give the perfusionist an idea of how much flow the patient needs to stay healthy.
Tissue oxygen saturation (StO2) can be measured by near infrared spectroscopy. Although the measurements are still widely discussed, they give an idea of tissue oxygenation in various conditions.
Peripheral oxygen saturation (SpO2) is an estimation of the oxygen saturation level usually measured with a pulse oximeter device. It can be calculated with pulse oximetry according to the following formula:
SpO2 = HbO2/ (HbO2 + Hb)
Example: Pulse Oximeter
Pulse oximetry is a method used to estimate the percentage of oxygen bound to hemoglobin in the blood. This approximation to SaO2 is designated SpO2 (peripheral oxygen saturation). The pulse oximeter consists of a small device that clips to the body (typically a finger, earlobe or an infants foot) and transfers its readings to a reading meter by wire or wirelessly. The device uses light-emitting diodes in conjunction with a light-sensitive sensor to measure the absorption of red and infrared light in the extremity. The difference in absorption between oxygenated and deoxygenated hemoglobin makes the calculation possible.[5]
Medical significance
Effects of decreased oxygen saturation[6]
SaO2Effect
85% and aboveNo evidence of impairment
65% and lessImpaired mental function on average
55% and lessLoss of consciousness on average
Healthy individuals at sea level usually exhibit oxygen saturation values between 96% and 99%, and should be above 94%. At 1600 meters altitude (about one mile high) oxygen saturation should be above 92%.[7]
An SaO2 (arterial oxygen saturation) value below 90% causes hypoxia (which can also be caused by anemia). Hypoxia due to low SaO2 is indicated by cyanosis, but oxygen saturation does not directly reflect tissue oxygenation. The affinity of hemoglobin to oxygen may impair or enhance oxygen release at the tissue level. Oxygen is more readily released to the tissues (i.e., hemoglobin has a lower affinity for oxygen) when pH is decreased, body temperature is increased, arterial partial pressure of carbon dioxide (PaCO2) is increased, and 2,3-DPG levels (a byproduct of glucose metabolism also found in stored blood products) are increased. When the hemoglobin has greater affinity for oxygen, less is available to the tissues. Conditions such as increased pH, decreased temperature, decreased PaCO2, and decreased 2,3-DPG will increase oxygen binding to the hemoglobin and limit its release to the tissue.[8]
While sitting in my blind watching for Wood Duck activity there was often a lot of peripheral activity that was equally exciting. One day in April a Great Blue Heron came out on what I call my "stage" (my range of visibility) and began hunting. Almost immediately it caught this Catfish and began maneuvering the fish in preparation to swallow it whole. After several minutes the heron finally had the fish in its throat but the catfish got stuck, probably hooked by one of the barbs. The heron gagged a bit and finally coughed the fish back out again, readjusted and then swallowed it in one swift move. I did see Wood Ducks that day, but it was this Great Blue Heron and its catfish sidekick that stole the show. April 18, 2015
I've been hiking Wilcox Pass to look for Bighorn Sheep since 1988, but this was my first time in four years. I hauled out of bed - I mean sleeping bag - early and was on the trail in the dim dark of pre-dawn. No searching was required. I emerged from the trees onto an open ridge and spotted four rams almost immediately. They allowed a close approach and were very relaxed.
When rams reach maturity, their horns can curl tightly enough to block their peripheral vision, so they often "broom" the tips off by rubbing them against rocks.
Photographed in Jasper National Park, Alberta. Don't use this image on websites, blogs, or other media without explicit permission © 2016 James R. Page - all rights reserved.
RAGE (Scorchers DLC)
3449x1940 || Console (toggle g_showhud;toggle hands_show , screenshot blends 64 name.tga (64xMSAA))
A mere peripheral against the immensity of the landscape, a solitary canoeist paddles in rhythm with the moment. Heart, pulse, lungs--all working in harmony--in concert with the natural vibrations of air, root, water, and rock.
Happy Slider's Sunday everyone.
Goose Lake, Sierra County, CA
Peripheral roads. With the bus line 78 stops at the terminus Bisceglie in connection with the Underground line 1
As I walked along the country road in the darkness I could only hear my own footsteps and my breathing matching my feet for pace. But my eyes became drawn to a swirl of white in the distance. I couldn't quite catch the swirl's form as I drew nearer, right up until she hit my peripheral vision and swam in the air before me... a vision.
~
Popovy Sisters Little Owl wearing a beaded collar by the sisters, a top by DollsSymphony and wig by Eclipse21
~
Rebelling against all the recent colour and contrast... it's not her turn but she does what she wants!
This view is always and forever the real view of a Jack Rabbit; one quick glimpse as it heads for the underbrush. This is a different animal from the one on the berm. But just as unhappy to see me.
A few things I notice in this photo: the thin delicacy of the huge ear, the strength of the muscles supporting those ears and if you look closely on the right side of its head, you can see its eyeball even from this perspective. This rabbit has some amazing peripheral vision; it can see me even though I am directly behind it.
Sandhamn (Swedish for "Sand Harbour") is a small settlement in the central-peripheral part of the Stockholm Archipelago in central-eastern Sweden, approximately 50 km (30 mi) east of Stockholm. Sandhamn is located on the island Sandön ("Sand Island"), which is, however, colloquially referred to as Sandhamn.
One of the most important natural ports in the archipelago with easy access to the Swedish capital, Sandhamn has been popular for pleasure boating since the late 19th century. It is known for its tavern, its clubhouse, and its harbour.
The island is approximately 9 km (5.6 mi) long and 6 km (3.7 mi) and consists mostly of sand and is dominated by beaches, dunes and especially pine forests.
Sandhamn receives an additional 100,000 visitors annually.
"Viveca Stens" popular novels come to life in "The Sandhamn Murders", a perfect mix of Nordic crime & the beautiful surroundings of the outer Stockholm archipelago.
Sandhamn (le nom veut dire port de sable) est une petite île de Suède située sur la mer Baltique. La population de ce petit port de pêcheurs n'excède pas les 110 habitants. Le tourisme y est développé grâce à des liaisons maritimes Stockholm-Sandhamn régulières en été.
Cette île est le lieu où se déroule l'action du roman La Reine de la Baltique de l'auteur Viveca Sten. Une adaptation de ce roman pour la télévision est diffusée en France sous le titre de "Meurtres à Sandhamn".
And still on Edinburgh's peripherals and to the north-west and the new Cammo terminus. In days now gone I viewed Edinburgh's Baillies and Councillors as strong custodians of the city's green belt and its difficult to think of a 'greener' area than the Cammo estates and its surrounds. However that mantra has slipped somewhat in recent years as more and more the city's green belt disappears.
A large number of houses have now been built here at Cammo, not far from Edinburgh airport and on the border of East Craigs another 'new' housing area. Lothian have seen fit to provide a service to the new area in the shape of extending service 41 which previously terminated to the north at Cramond. Older stock now seems the 'norm' on the 41 as seen here with fleet 372 at the Cammo terminus in a 'seaonal' downpour of rain which appears to have won a contest with the new drains! 372 will work back to Cramond and follow the old 41 route across the city to The Grange and King's Buildings.
Good peripheral vision is definitely an asset when it comes to riding a motorcycle.
Somewhere along Highway 17(TransCanada), north of Lake Superior, near Marathon, Ontario. On my Suzuki 650 V-Strom.
While patiently waiting for the hikers to clear out in this area of Wall Street in the Narrows of Zion NP, I noticed a certain glow on my right that turned-out to be the tree and the wall behind it being lit by the light bouncing on the wall on my left. I quickly changed my composition and was able to fire some shots before the light moved out of frame. Patience has it's rewards, always, it seems.
My father's F.P.I. horse hair desk brush and paper weight from his patent drafting career. The paper weight is one of a few he made and the brush features a twine job he did on the handle. After that much effort it makes sense to mark the items with your initials.
Two evenly matched Rocky Mountain Bulls put on a vicious fighting demonstration while frustrated by high testosterone and a herd bull much larger and more skilled than they are. All rights reserved.
Eye looking through a snoot in black and white. Concept for Retinitis Pigmentosa Awareness Month (February).
Do you have these moments when you spot a creature out of your peripheral vision and you wish it would freeze where it is? I had such a moment, the creature was a skink. But as skinks do, they try to run and hide.
I followed this little skink from the grass on the side of the driveway until it disappeared under the car. Thankfully the car was parked. I was trying to figure out where it was hiding when I spotted it again. Rest assured, I gave it enough room to move and not feeling in danger and so it was moving from under the car to the front of it. I was able to capture a few photos before it decided to dash back under the car again.
What an encounter it was, I love being in the fauna rich Sunshine Coast Hinterlands.
Description:
Robust, with a dusting of fine pale lateral dots. Golden brown to coppery brown with many scattered to transversely aligned dark dorsal flecks, several large black lateral blotches between ear and forelimbs, and yellow and black mottled flanks with prominent, fine, white, to bluish-white dots. Ventral surface pale yellow between forelimbs and hind limbs. (Text Source: A Complete Guide to Reptiles of Australia, third edition)
My passion is wildlife photography. I hope I can bring the beauty of nature into your home and show how amazing nature is. Every single animal needs our protection as they all play an important part in our survival.
There is an abundance of scientific reports telling us that the rate of extinction is happening at an alarming rate. More and more fauna and flora are going to disappear. With my wildlife photography, I hope to showcase a fraction of animals before they are gone. Only what you know, you will love and protect…
©️ Spohr Photography 2020, all rights reserved
THE MASTER OF PERIPHERAL VIBRATIONS / THE FINAL / CHRISTELLE GEISER & AEON VON ZARK / NAKED EYE PROJECT BIENNE / ALTERED STATE SERIE / THE WEIRD DREAM / PORTRAIT.
From Wikipedia:
"The word is used to describe the sensation of having glimpsed oneself in peripheral vision, in a position where there is no chance that it could have been a reflection."
"In September 2006, it was reported in Nature that Shahar Arzy and colleagues of the University Hospital, Geneva, Switzerland, unexpectedly had reproduced an effect strongly reminiscent of the doppelgänger phenomenon via the electromagnetic stimulation of a patient's brain. They applied focal electrical stimulation to a patient's left temporoparietal junction while she lay flat on a bed. The patient immediately felt the presence of another person in her "extrapersonal space." Other than epilepsy, for which the patient was being treated, she was psychologically fit.
The other person was described as young, of indeterminate sex, silent, motionless, and with a body posture identical to her own. The other person was located exactly behind her, almost touching and therefore within the bed on which the patient was lying.
A second electrical stimulation was applied with slightly more intensity, while the patient was sitting up with her arms folded. This time the patient felt the presence of a "man" who had his arms wrapped around her. She described the sensation as highly unpleasant and electrical stimulation was stopped.
Finally, when the patient was seated, electrical stimulation was applied while the patient was asked to perform a language test with a set of flash cards. On this occasion the patient reported the presence of a sitting person, displaced behind her and to the right. She said the presence was attempting to interfere with the test: "He wants to take the card; he doesn’t want me to read." Again, the effect was disturbing and electrical stimulation was ceased.
Similar effects were found for different positions and postures when electrical stimulation exceeded 10 mA, at the left temporoparietal junction.
Arzy and his colleagues suggest that the left temporoparietal junction of the brain evokes the sensation of self image—body location, position, posture etc. When the left temporoparietal junction is disturbed, the sensation of self-attribution is broken and may be replaced by the sensation of a foreign presence or copy of oneself displaced nearby. This copy mirrors the real person's body posture, location and position. Arzy and his colleagues suggest that the phenomenon they created is seen in certain mental illnesses, such as schizophrenia, particularly when accompanied by paranoia, delusions of persecution and of alien control. Nevertheless, the effects reported are highly reminiscent of the doppelgänger phenomenon. Accordingly, some reports of doppelgängers may well be due to failure of the left temporoparietal junction."
wall_e_001
“Flippers”
“And when i see you, i really see you upside down...
but my brain knows better, and picks you up and turns you 'round, turns you around…” -DCFC
Did you know that your eye is a converging lens?
“When you see things around you, your retina projected the images upside down. This is due to the optics used by our eyes. Images need to be flip so we can see objects much larger than the size of our pupil and so that we may have peripheral vision.” -hhttp://www.retinaeyedoctor.com/2010/03/eye-images-reversed-on-retina/
Even though a sheep eye and a human eye are different, they do share a few similarities. Sheep cannot see color, but they do have better peripheral vision than humans do. Scientists are very interested in studying the eyes of sheep because their research has led them to believe they can discover many new things about vision in humans and how they can correct problems.
It is extremely difficult to compare the eyes and the vision of two different species. In the case of the sheep eye and the human eye, though, there are many differences. The human eye has a fovea in the retina where the vision cells are located. This allows people to have sharp, clear vision. There is no fovea in the eye of a sheep, which means they are unable to focus on a specific object as humans can.
The eyes of the sheep are located on the sides of the head which enables them to be able to have a better peripheral vision, and this means that they have better vision to the sides. The human eyes face forward and this gives them overlapping, binocular vision. The eyes of the sheep are farther back on the top of their heads so that they have the ability to scan areas that are close by while they are grazing. This is also something that humans are unable to do.
Humans have a narrower field of vision than sheep, but they do have a greater field of depth perception than sheep. But this is not regarded as a major fault of the sheep eye because sheep not need depth perception in order to see grass in the field. For them the peripheral vision is more important because it enables them to see predators and this gives them time to escape.
More differences between the sheep eye and the human eye
1.The human eye has a circular shaped pupil, but the pupil in the sheep eye is oval in shape.
2.In the eye of the sheep there is a layer of tissues called the tapectum lucidum and this causes light to reflect off the eyes. This tissue is not present in the human eye.
3.Sheep have eyes on the sides of their heads, but human eyes face forward.
4.The human eye has depth perception, but the sheep eye does not.
5.In the human eye there are six muscles to allow movement, but in the sheep eye there are only four.
Source: *VSPages*
WEEK 22 – FGS Kroger, Set II
Here’s another look at the central portion of the façade, home to the Kroger logo and offshoot “Food & Pharmacy” signage. Actually… can this really be called the central portion? It’s actually the rightmost area of the storefront, not the center. But I would imagine the placement of the logo indicates centrality, insofar as the definition “of the greatest importance; principal or essential” is concerned (and not “of, at, or forming the center”). Oh well. Unlike me, I’m sure most (if not all!) of you could care less about all that stuff, so I digress. :P
Kroger // 1690 Powder Springs Road SW, Marietta, GA 30064
(c) 2019 Retail Retell
These places are public so these photos are too, but just as I tell where they came from, I'd appreciate if you'd say who :)