Today I Learn

08 Nov 2023 13:46

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Today I Learn

07 Nov 2023 08:01

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04 Nov 2023 01:24

What happens during fruit ripening ?

The action of the enzymes cause the ripening responses. Chlorophyll is broken down and sometimes new pigments are made so that the fruit skin changes color from green to red, yellow, or blue.

Acids are broken down so that the fruit changes from sour to neutral. The degradation of starch by amylase produces sugar.

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30 Oct 2023 16:13

​​What is Motion Sickness?

Motion sickness, also known as travel sickness or kinetosis, is a condition characterized by a combination of symptoms that occur when there is a discrepancy between the motion sensed by the inner ear and the visual perception of motion. It typically occurs during travel or when exposed to certain types of motion, such as in a moving vehicle, boat, airplane, or amusement park ride.
When we are in motion, our body receives sensory input from various sources, including the inner ear (vestibular system), eyes, and muscles. These sensory inputs are normally synchronized, providing a consistent perception of movement. However, in certain situations, such as when reading in a moving vehicle or looking at a stationary object while on a boat, there can be conflicting sensory information, leading to motion sickness.

The exact mechanisms behind motion sickness are not fully understood, but it is believed to involve a complex interplay between the vestibular system, the visual system, and the central nervous system. The inner ear's vestibular system plays a crucial role in detecting motion and maintaining balance. When there is a mismatch between the information received from the inner ear and the visual system, the brain interprets it as a potential poisoning or intoxication, triggering a range of symptoms.

Symptoms of motion sickness can vary in intensity and may include:
Nausea and vomiting
Sweating
Dizziness and vertigo
Fatigue and drowsiness
Headache etc

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Today I Learn

23 Oct 2023 03:08

​​Why do some people opt to get Botox Injection?

Botox is a popular cosmetic treatment that involves injecting a small amount of a toxin called botulinum into the skin.

The toxin works by temporarily paralyzing the muscles in the area, which can smooth out wrinkles and fine lines.

People opt to get Botox for a variety of reasons.

One of the main reasons is to reduce the appearance of wrinkles and fine lines on their face, particularly on the forehead, between the eyebrows, and around the eyes.

These are often referred to as "expression lines" because they are caused by repeated facial expressions over time, such as smiling, frowning, and squinting.

Botox can also be used to treat medical conditions such as migraines, excessive sweating, and muscle spasms.

In these cases, the toxin is injected into specific muscles to block the nerve signals that cause the condition.

Overall, the decision to get Botox is a personal one and can depend on a variety of factors such as personal preference, lifestyle, and budget. It's important to work with a qualified and experienced provider to ensure the safest and most effective treatment possible.

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15 Oct 2023 15:55

​​What is the function of Silica Gel in Power Transformers?

The transformer is filled with a insulating oil known as transformer oil.

This insulates the windings from the tank in which the core and windings are housed.The dielectric strength of oil is very sensitive to the presence of moisture.

Other wise even the presence of a few ppm of moisture drastically reduces its dielectric strength.

The transformer is not completely filled with oil. Some space is left above the oil level to cater for expansion of oil due to heating during working.

The oil expands when it becomes hot during working ,the air above oil level goes out through a breather arrangement.

During low load periods ,the temperature of the oil comes down and the volume of the oil reduces and air from outside enters through the breather to fill up the space.

Silica gel is placed inside the breather and the silica gel absorbs the moisture in the air and lets in dry air only in to the transformer.

Thus silica gel ensures no moisture enters the transformer through air and the dielectric strength of transformer is intact.

The image shows 2 silica breathers attached to a transformer.

The breather on the left shows no oil in the breather reservoir and the silica gel is being discoloured from the bottom up. This indicates moisture coming from the outside world and not the transformer.

The silica gel on the right shows no discolouration so we can assume no moisture in the transformer oil.

In this instance the colour change of the silica is from blue when dry and reddish brown when it has absorbed moisture.

There are many other colour changing combinations through silica and other materials used in transformer breathers.

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Today I Learn

12 Oct 2023 16:21

What is Gesture Recognition Technology and How Does It Work?

As the name suggests, gesture recognition is designed to recognize the physical movements, or “gestures,” of humans. Waving your hand in a particular pattern in front of the device, for instance, may tell it to launch a specific app. Gesture recognition such as this is often found in smartphones and tablet computers. 

Gesture recognition is classified as a type of touchless user interface (TUI). Unlike a touchscreen device, TUI devices are controlled without touch. A voice-controlled smart speaker like Google Home and Amazon Alexa are prime examples of TUIs. By speaking commands, you can control these devices, all without relying on touch. However, gesture recognition is also a type of TUI, as it’s also controlled without the use of touch. With that said, many devices that support gesture recognition also support touchscreen.

While there are many different types of gesture recognition technology, they all work on the same basic principle of recognizing human movement as a form of input. The device features one or more sensors — or cameras — that monitors the user’s movement. When it detects a movement that corresponds with a command, it responds with the appropriate output. This may be unlocking the device, launching an app, changing the volume, etc.

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08 Oct 2023 14:25

​​What is Digital Signature?

A digital signature is a cryptographic technique used to verify the authenticity, integrity, and non-repudiation of digital documents or messages. It provides a way to ensure that a digital document or message has not been tampered with during transmission and that it originated from the expected sender.

Here's how digital signatures work:

Hashing: The first step in creating a digital signature is to generate a unique hash value for the document or message. A hash function takes the input data and produces a fixed-size string of characters, called a hash value or message digest. Even a small change in the input data will result in a significantly different hash value.

Private Key Encryption: The hash value is then encrypted using the sender's private key. The private key is a part of a cryptographic key pair, consisting of a private key and a corresponding public key. The private key is kept secret and known only to the sender.

Digital Signature: The encrypted hash value, along with the original document or message, forms the digital signature. It is appended to the document or message and can be transmitted along with it.

Verification: To verify the digital signature, the recipient uses the sender's public key to decrypt the encrypted hash value. If the decrypted hash value matches the hash value computed from the received document or message, it indicates that the document or message has not been altered during transmission and that it originated from the expected sender.

Digital signatures provide several benefits:

Authentication: Digital signatures provide proof of the identity of the sender. The recipient can verify the signature using the sender's public key, ensuring that the document or message was signed by the claimed sender.

Integrity: Any modification to the signed document or message, intentional or accidental, will result in a different hash value, rendering the signature invalid. Thus, digital signatures protect the integrity of the data by detecting any changes made.

Non-repudiation: Digital signatures provide non-repudiation, which means that the sender cannot deny sending the document or message. Since the signature can only be created with the sender's private key, it serves as evidence of the sender's intent.

Tamper Detection: If someone tries to tamper with the document or message during transmission, the signature verification will fail, indicating that the data has been altered.

Digital signatures are widely used in various applications, such as secure email communication, software distribution, financial transactions, contracts, and legal documents. They play a crucial role in ensuring the security and authenticity of digital communications and transactions.

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Today I Learn

04 Oct 2023 06:08

What is the link between climate crisis and meat/dairy products?

The link between climate crisis and meat/dairy products may not be obvious, but for many experts it’s clear.

🥩🥛↔️🌏🌦
Studies affirm that between 11.1 and 19.6% of global human-made greenhouse gas (GHG) emissions come from meat and dairy production/animal agriculture, which is a leading cause of deforestation, responsible for significant biodiversity loss and pollution, and emits large amounts of methane, which alone is the cause of over 25% of global warming.

📌Some experts even claim that animal agriculture is the largest contributor to global climate change.

📌However, according researchers, the extent to which it contributes to global emissions depends on how studies define different economic sectors, and whether they incorporate farming equipment and food exports in the assessment of animal impact.

ℹ️Most sources list animal agriculture as the No. 2 contributor to GHG emissions after fossil fuels.

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Today I Learn

01 Oct 2023 22:17

​​How does Graphene coating improve a car's appearance?

Graphene coating can improve a car's appearance in several ways.

First, graphene is a highly durable and transparent material, which means that when applied as a coating on a car's surface, it can provide long-lasting protection against scratches, chips, and other types of damage that can affect a car's appearance.

This can help keep the car looking newer and more attractive for a longer period of time.

Secondly, graphene coatings can create a hydrophobic effect on the car's surface, which means that water and other liquids will bead up and roll off the surface instead of sticking to it.

This can help prevent water spots and stains from forming, which can make a car look dull and dirty.

Additionally, graphene coatings can enhance a car's shine and colour depth, giving it a more vibrant and lustrous appearance.

The ultra-smooth surface of the graphene coating can reflect light more effectively, which can make the car's paint job look brighter and more vivid.

Finally, because graphene is a nanomaterial, it can be applied in very thin layers, which can make the car's surface feel smoother to the touch. This can create a sleek and polished look that enhances the overall appearance of the car.

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Today I Learn

27 Sep 2023 04:16

​​What is Gesture Recognition Technology and How Does It Work?

As the name suggests, gesture recognition is designed to recognize the physical movements, or “gestures,” of humans. Waving your hand in a particular pattern in front of the device, for instance, may tell it to launch a specific app. Gesture recognition such as this is often found in smartphones and tablet computers. 
Gesture recognition is classified as a type of touchless user interface (TUI). Unlike a touchscreen device, TUI devices are controlled without touch. A voice-controlled smart speaker like Google Home and Amazon Alexa are prime examples of TUIs. By speaking commands, you can control these devices, all without relying on touch. However, gesture recognition is also a type of TUI, as it’s also controlled without the use of touch. With that said, many devices that support gesture recognition also support touchscreen.
While there are many different types of gesture recognition technology, they all work on the same basic principle of recognizing human movement as a form of input. The device features one or more sensors — or cameras — that monitors the user’s movement. When it detects a movement that corresponds with a command, it responds with the appropriate output. This may be unlocking the device, launching an app, changing the volume, etc.

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Today I Learn

24 Sep 2023 02:53

What is the greenhouse effect and why is it important?

✅ The greenhouse effect is the way in which heat is trapped close to Earth's surface by “greenhouse gases.” These heat-trapping gases can be thought of as a blanket wrapped around Earth, keeping the planet toastier than it would be without them.

✅ Scientists have determined that carbon dioxide's warming effect helps stabilize Earth's atmosphere. Remove carbon dioxide, and the terrestrial greenhouse effect would collapse. Without carbon dioxide, Earth's surface would be some 33°C (59°F) cooler.

✅ Greenhouse gases occur naturally and are part of our atmosphere's makeup. For that reason, Earth is sometimes called the “Goldilocks” planet – its conditions are not too hot and not too cold, but just right to allow life (including humans) to flourish. Part of what makes Earth so amenable is its natural greenhouse effect, which keeps the planet at a friendly 15 °C (59 °F) on average.

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21 Sep 2023 17:16

The Little Death

If you have seen this series or movie then please share your thoughts.

@moviesthought

Today I Learn

19 Sep 2023 07:12

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14 Sep 2023 02:58

​​What is the difference between Sugar Free, No Sugar Added, and Unsweetened?

Reading food labels can be tricky, especially when all the words sound like they mean the same thing. When you're grocery shopping and you see labels with "sugar free," "no sugar added," and "unsweetened," it may seem like you can buy any one of those products interchangeably. But each of those labels means something a little different.
The terms "sugar-free," "no sugar added," and "unsweetened" are often used on food and beverage labels to indicate different levels of sugar content or sweeteners. Here's an explanation of the differences between these terms:

Sugar-Free: "Sugar-free" means that the product contains no added sugars or sugar-based sweeteners. However, it's important to note that "sugar-free" doesn't necessarily mean the product is completely devoid of sweetness. Sugar alcohols or artificial sweeteners may be used as sugar substitutes to provide a sweet taste without adding actual sugar. It's crucial to check the ingredients list to see if any sweeteners or sugar substitutes are present.

No Sugar Added: "No sugar added" means that no additional sugars or sugar-based sweeteners have been added during the manufacturing process. However, the product may still contain naturally occurring sugars, such as those found in fruits or dairy products. It's important to read the nutrition facts label to determine the total sugar content and differentiate between naturally occurring sugars and added sugars.

Unsweetened: "Unsweetened" means that no sweeteners, including both natural and artificial sweeteners, have been added to the product. It indicates that the food or beverage is in its natural state without any added sweetness. However, it's essential to note that the product may still contain naturally occurring sugars, depending on the ingredients used.

When making dietary choices, it's important to consider individual dietary needs and preferences. If you're looking to reduce sugar intake, it's beneficial to read nutrition labels carefully and pay attention to the ingredients list to identify any hidden sugars or sweeteners that may be present. Additionally, it's advisable to consult a healthcare professional or registered dietitian for personalized guidance on sugar consumption and overall dietary choices.

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Today I Learn

07 Nov 2023 14:14

​​​​What is the Gel that is applied before an Ultrasound Scan?

Ultrasound is a special form of technology that sends pulsing sound waves at a high frequency deep into the tissue of a patient using a probe or a transducer. The gel is rubbed onto the skin to help the transducer easily glide along the surface. The device can receive and also send sound waves, which then appear as images that are seen on a computer screen. A sonographer looks at the images to make sure that everything appears normal. This is done in real time and the person operating the ultrasound technology can move the transducer or the probe as required to get a fully defined picture of what’s happening beneath skin level. Screenshot images can also be taken and printed out if required.

Ultrasound gel is composed of a mix of propylene glycol and water. Propylene glycol is a synthetic product that is commonly found in hygiene, cosmetic and food products. It is quite sticky and thick. It’s important for it to have a sticky texture so that it stays on your skin and doesn’t drip off when the ultrasound is being performed.
The gel has a shelf life of approximately 5 years if the bottle remains unopened. Once opened, however, it’s recommended that it be used up within 28 days for the purpose of infection control.

Another thing that can get in the way of reducing clear images is static electricity. Ultrasound gel eliminates the static so that the procedure can be done effectively without any risk of static getting in the way.

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05 Nov 2023 05:35

What are glial cells?

✔️The second main type in the nervous system are glial cells.

Glial cells (named from the Greek word for "glue") are non-neuronal cells that provide support and nutrition, maintain homeostasis, form myelin, and participate in signal transmission in the nervous system.

Among the most important functions of glial cells are:
📍to support neurons and hold them in place
📍to supply nutrients to neurons
📍to insulate neurons electrically
📍to destroy pathogens and remove dead neurons
📍to provide guidance cues directing the axons of neurons to their targets.

✍️A very important set of glial cell generate layers of a fatty substance called myelin that wrap around axons and provide electrical insulation that allows them to transmit signals much more rapidly and efficiently.

✍️🧠In the human brain, it is currently estimated that the total number of glia roughly equals the number of neurons, although the proportions vary in different brain areas.

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03 Nov 2023 04:00

​​Why can’t we store AC in Batteries instead of DC?

Electrical energy is not stored directly in a battery. The battery stores electrical energy in the form of chemical energy.

Imagine that an alternating current (AC) is supplied directly to a rechargeable battery, with the negative terminal of the AC source connected to the negative terminal of the battery and the positive terminal of the AC source connected to the positive terminal of the battery.

The current starts flowing. But something goes wrong.
Alternating Current (AC) changes its polarities (i.e. it flows in two directions).

That is, in the one-half cycle of the AC waveform, current flows in one direction, but flows in the opposite direction during the other half cycle.

During the positive half cycle of the AC, conventional current flows to the battery through Cathode, and it gets charging. But when the AC gets to the negative half cycle, the current direction reverses, thereby leading to a discharge of the battery. And so on.

In the end, the positive half cycle of the AC that is charging the battery cancels out the negative half cycle that is discharging the battery.  

So, the battery does not get charged.

In fact, if the Alternating Current (AC) continues to supply the battery, it could damage it.
To prevent the discharge of the battery caused by the negative half cycle of the AC, the battery terminals would have to be changed as the AC alternates from Positive to Negative half cycle.

That is, the battery terminals would have to change as the AC changes. This will have to be done at the same frequency as the AC.

It means,if the frequency of the AC is 60Hz, the battery terminals would have to be changed 60 times in one second.

Do you think this is possible? Not at all.

Or probably not yet.

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26 Oct 2023 15:24

​​Why do satellites seem to be wrapped in Golden colored Foils?

This is referred to in the space community as Multi Layer Insulation (MLI). There are different types of it, the fancier stuff is made of alumnized polyimide (Kapton) which is where the gold color comes from. 
Depending on which way you have the outer and inner layers of the MLI configured you can have it both reflect solar energy and radiate heat, or retain heat while preventing radiation. So certain configurations will keep hot components hot and prevent them from losing heat to radiation, while other configurations will prevent heat from radiating into the component. It is also used to keep warmer spacecraft components (certain instruments, thrusters) from radiating heat to other parts of the spacecraft such as temperature-sensitive instruments. 

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20 Oct 2023 07:00

​​What is Cancer?

Cancer is a complex and broad term that refers to a group of diseases characterized by the uncontrolled growth and spread of abnormal cells in the body. These abnormal cells, known as cancer cells, have the ability to invade and destroy healthy tissues and organs.

In a healthy body, cells grow, divide, and die in a controlled manner to maintain normal tissue function and repair damaged cells. However, in cancer, this normal process is disrupted. The exact causes of cancer are often multifactorial and can include genetic mutations, exposure to carcinogens (such as tobacco smoke or certain chemicals), underlying chronic inflammation, hormonal imbalances, and various other factors.

The development of cancer typically involves several stages. It usually begins with a genetic mutation or a series of mutations that affect the normal functioning of a cell's DNA. These mutations can occur randomly or be inherited from parents. Certain risk factors, such as tobacco use, exposure to radiation, or viral infections, can increase the likelihood of these mutations.

Once a cell's DNA has been altered, it can start to divide and multiply rapidly, forming a mass of cells called a tumor. Tumors can be benign or malignant. Benign tumors are non-cancerous and do not invade nearby tissues or spread to other parts of the body. Malignant tumors, on the other hand, are cancerous and have the ability to invade surrounding tissues and metastasize, which means they can spread to other parts of the body through the bloodstream or lymphatic system.

As cancer progresses, it can interfere with the normal functioning of organs and tissues. Cancer cells can deprive healthy cells of oxygen and nutrients, produce toxic substances, and disrupt the body's normal physiological processes. The symptoms and effects of cancer depend on the type and stage of the disease, as well as the organs or tissues involved.

Cancer can be a serious and life-threatening condition, but advances in medical research and treatment have improved outcomes for many cancer patients. Treatments for cancer can include surgery, radiation therapy, chemotherapy, immunotherapy, targeted therapy, and hormone therapy, among others. The choice of treatment depends on various factors, including the type and stage of cancer, the patient's overall health, and individual preferences.

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14 Oct 2023 03:48

​​What is Lightning?

Lightning is a giant spark of electricity in the atmosphere between clouds, the air, or the ground. In the early stages of development, air acts as an insulator between the positive and negative charges in the cloud and between the cloud and the ground. When the opposite charges build up enough, this insulating capacity of the air breaks down and there is a rapid discharge of electricity that we know as lightning. The flash of lightning temporarily equalizes the charged regions in the atmosphere until the opposite charges build up again.

Lightning can occur between opposite charges within the thunderstorm cloud (intra-cloud lightning) or between opposite charges in the cloud and on the ground (cloud-to-ground lightning).

Lightning is one of the oldest observed natural phenomena on earth. It can be seen in volcanic eruptions, extremely intense forest fires, surface nuclear detonations, heavy snowstorms, in large hurricanes, and obviously, thunderstorms.
Most, if not all, lightning flashes produced by storms start inside the cloud. If a lightning flash is going to strike ground, a channel develops downward toward the surface. When it gets less than roughly a hundred yards of the ground, objects like trees and bushes and buildings start sending up sparks to meet it. When one of the sparks connects the downward developing channel, a huge electric current surges rapidly down the channel to the object that produced the spark. Tall objects such as trees and skyscrapers are more likely than the surrounding ground to produce one of the connecting sparks and so are more likely to be struck by lightning. Mountains also make good targets. However, this does not always mean tall objects will be struck. Lightning can strike the ground in an open field even if the tree line is close by.

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12 Oct 2023 03:47

​​What are contact Lenses made of?

There are three main categories of contact lenses, based on the materials they are made of: soft contacts, rigid gas permeable (GP) contacts, and hybrid contact lenses.
Soft contacts are made of pliable hydrophilic ("water-loving") plastics called hydrogels.

Hydrogels absorb significant amounts of water to keep the lenses soft and supple.
Because of this water-loving characteristic, the water content of various hydrogel contact lenses can range from approximately 38 to 75 percent (by weight).

The water content of soft lenses allows oxygen to pass through the lenses and keep the cornea healthy during contact lens wear.

Gas permeable contacts, also called GP or RGP lenses, are rigid (hard) contact lenses. Like hydrogels used for soft lenses, materials used to create GP contact lenses also are "gas permeable," allowing oxygen to pass through the lenses to the cornea.

Unlike soft lenses, however, rigid gas permeable lenses do not contain significant amounts of water. Instead, GP lenses rely on their microscopically porous nature to transmit oxygen to the cornea.

Hybrid contact lenses have a rigid GP central optical zone, surrounded by a peripheral fitting zone made of a soft contact lens material.

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06 Oct 2023 03:02

​​Why does your Stomach growl when you are hungry?

The growling sound you hear from your stomach when you're hungry is known as "borborygmi" (singular: borborygmus). It is a normal physiological response that occurs as a result of the movement and contraction of the muscles in your gastrointestinal tract.

When you haven't eaten for a while, your stomach and intestines go through a process called the migrating motor complex (MMC). The MMC is a cyclical pattern of contractions that helps move residual food particles, gas, and digestive secretions along the digestive system.

During the fasting phase, which occurs between meals or when you haven't eaten for some time, the MMC becomes more active. These contractions can create the rumbling or growling noises you hear.

The growling sounds are caused by the movement of gas and fluid in your intestines, as well as the contraction of muscles in the stomach and small intestine. The contractions can be quite forceful, and when they occur in the presence of air and fluid, they produce the characteristic rumbling sound.

It's important to note that borborygmi are not exclusive to hunger. They can also be caused by other factors, such as gas or the movement of stool through the digestive system. Additionally, some individuals may experience more noticeable stomach growling than others, even when they are not necessarily hungry.

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03 Oct 2023 02:02

​​What is the difference between Sugar Free, No Sugar Added, and Unsweetened?

Reading food labels can be tricky, especially when all the words sound like they mean the same thing. When you're grocery shopping and you see labels with "sugar free," "no sugar added," and "unsweetened," it may seem like you can buy any one of those products interchangeably. But each of those labels means something a little different.
The terms "sugar-free," "no sugar added," and "unsweetened" are often used on food and beverage labels to indicate different levels of sugar content or sweeteners. Here's an explanation of the differences between these terms:

Sugar-Free: "Sugar-free" means that the product contains no added sugars or sugar-based sweeteners. However, it's important to note that "sugar-free" doesn't necessarily mean the product is completely devoid of sweetness. Sugar alcohols or artificial sweeteners may be used as sugar substitutes to provide a sweet taste without adding actual sugar. It's crucial to check the ingredients list to see if any sweeteners or sugar substitutes are present.

No Sugar Added: "No sugar added" means that no additional sugars or sugar-based sweeteners have been added during the manufacturing process. However, the product may still contain naturally occurring sugars, such as those found in fruits or dairy products. It's important to read the nutrition facts label to determine the total sugar content and differentiate between naturally occurring sugars and added sugars.

Unsweetened: "Unsweetened" means that no sweeteners, including both natural and artificial sweeteners, have been added to the product. It indicates that the food or beverage is in its natural state without any added sweetness. However, it's essential to note that the product may still contain naturally occurring sugars, depending on the ingredients used.

When making dietary choices, it's important to consider individual dietary needs and preferences. If you're looking to reduce sugar intake, it's beneficial to read nutrition labels carefully and pay attention to the ingredients list to identify any hidden sugars or sweeteners that may be present. Additionally, it's advisable to consult a healthcare professional or registered dietitian for personalized guidance on sugar consumption and overall dietary choices.

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Today I Learn

01 Oct 2023 03:07

​​What is Gesture Recognition Technology and How Does It Work?

As the name suggests, gesture recognition is designed to recognize the physical movements, or “gestures,” of humans.

Waving your hand in a particular pattern in front of the device, for instance, may tell it to launch a specific app.

Gesture recognition such as this is often found in smartphones and tablet computers. 

Gesture recognition is classified as a type of touchless user interface (TUI). Unlike a touchscreen device, TUI devices are controlled without touch. A voice-controlled smart speaker like Google Home and Amazon Alexa are prime examples of TUIs.

By speaking commands, you can control these devices, all without relying on touch.

However, gesture recognition is also a type of TUI, as it’s also controlled without the use of touch.

With that said, many devices that support gesture recognition also support touchscreen.
While there are many different types of gesture recognition technology, they all work on the same basic principle of recognizing human movement as a form of input.

The device features one or more sensors — or cameras — that monitors the user’s movement. When it detects a movement that corresponds with a command, it responds with the appropriate output.

This may be unlocking the device, launching an app, changing the volume, etc.

Subscribe- @TodayILearn

Today I Learn

26 Sep 2023 15:21

​​Why does your Stomach growl when you are hungry?

The growling sound you hear from your stomach when you're hungry is known as "borborygmi" (singular: borborygmus). It is a normal physiological response that occurs as a result of the movement and contraction of the muscles in your gastrointestinal tract.

When you haven't eaten for a while, your stomach and intestines go through a process called the migrating motor complex (MMC). The MMC is a cyclical pattern of contractions that helps move residual food particles, gas, and digestive secretions along the digestive system.

During the fasting phase, which occurs between meals or when you haven't eaten for some time, the MMC becomes more active. These contractions can create the rumbling or growling noises you hear.

The growling sounds are caused by the movement of gas and fluid in your intestines, as well as the contraction of muscles in the stomach and small intestine. The contractions can be quite forceful, and when they occur in the presence of air and fluid, they produce the characteristic rumbling sound.

It's important to note that borborygmi are not exclusive to hunger. They can also be caused by other factors, such as gas or the movement of stool through the digestive system. Additionally, some individuals may experience more noticeable stomach growling than others, even when they are not necessarily hungry.

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Today I Learn

23 Sep 2023 10:12

​​How does Soap and Detergent work?

Soaps and detergents are made from long molecules that contain a head and tail. These molecules are called surfactants; the diagram below represents a surfactant molecule.

The head of the molecule is attracted to water (hydrophilic) and the tail is attracted to grease and dirt (hydrophobic). When the detergent molecules meet grease on clothes, the tails are drawn into the grease but the heads still sit in the water.
The attractive forces between the head groups and the water are so strong that the grease is lifted away from the surface. The blob of grease is now completely surrounded by detergent molecules and is broken into smaller pieces which are washed away by the water.
The detergent molecules also help to make the washing process more effective by reducing the surface tension of the water. Surface tension is the force which helps a blob of water on a surface hold its shape and not spread out. The attractant molecules of the detergent break apart these forces and make water behave, well, wetter!

Today I Learn

20 Sep 2023 04:10

​​What is Gesture Recognition Technology and How Does It Work?

As the name suggests, gesture recognition is designed to recognize the physical movements, or “gestures,” of humans. Waving your hand in a particular pattern in front of the device, for instance, may tell it to launch a specific app. Gesture recognition such as this is often found in smartphones and tablet computers. 
Gesture recognition is classified as a type of touchless user interface (TUI). Unlike a touchscreen device, TUI devices are controlled without touch. A voice-controlled smart speaker like Google Home and Amazon Alexa are prime examples of TUIs. By speaking commands, you can control these devices, all without relying on touch. However, gesture recognition is also a type of TUI, as it’s also controlled without the use of touch. With that said, many devices that support gesture recognition also support touchscreen.
While there are many different types of gesture recognition technology, they all work on the same basic principle of recognizing human movement as a form of input. The device features one or more sensors — or cameras — that monitors the user’s movement. When it detects a movement that corresponds with a command, it responds with the appropriate output. This may be unlocking the device, launching an app, changing the volume, etc.

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Today I Learn

18 Sep 2023 06:19

​​What are the importance of Foundation in building construction?

A strong and well-designed foundation is essential for any building construction for several reasons:
Structural Integrity: The foundation serves as the base on which the entire building structure rests. A strong foundation helps to distribute the weight of the building evenly, providing stability and ensuring that the building remains standing during natural disasters or ground movements.
Stability: A sturdy foundation ensures that the building remains stable and level. This is particularly important in areas prone to earthquakes, floods, or landslides, where a weak foundation can cause the building to collapse or shift.
Prevents Settlement: A well-built foundation helps to prevent settlement or sinking of the building, which can lead to structural damage or cracks in the walls and foundation.
Longevity: A good foundation can help to extend the lifespan of the building, preventing premature decay, and reducing the need for costly repairs.
Building Code Compliance: Building codes require that all buildings have a foundation that meets specific criteria. A properly designed and constructed foundation ensures that the building meets these requirements, ensuring compliance with the code.
A foundation is crucial in building construction as it provides structural integrity, stability, prevents settlement, increases longevity, and ensures building code compliance.

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10 Sep 2023 17:24

​​What Is Glare?

When a bundle of light hits a flat surface, it becomes polarized, or is reflected horizontally.  The bundle becomes concentrated and is blinding anyone observing it. This is referred to as blinding glare.

These reflections can be uniform, which is light reflected from a smooth service. Uniform reflections would be light reflected off the road, or off a car’s bumper or back window. They can also be non-uniform, which is light reflected from an uneven surface. An example of this would be light reflected off running water or a patch of ice on the road.

No matter what the case, the desired result is to filter out the distracting reflected light and provide a clear viewing experience for the wearer.

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