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Electronic Pill, The Holy Grail Of Healthcare Technology 👉 Human body is a sensitive system, and sometimes doctors are unable to detect a disease in time and it becomes too late to cure it. Use of an electronic pill helps to easily detect diseases, and this can help take prompt action against them. 👉 Electronic pill technology makes use of different components/parts such as drug reservoir, delivery pump, electronic microcontroller (MCU), wireless communication and sensors. 👉 These elements have to be combined in a way so as to preserve small size, reliable manufacturing and a safety profile fit for medical use. 👉 The device containing these parts is built as a small, pill-shaped capsule, which is swallowed and passed through the gastro-intestinal tract. 👉 Use of an electronic pill will free users from invasive methods such as catheters, endoscopic instruments or radioisotopes for collecting information about the digestive tract.  👉 Drug delivery using an electronic pill will also be controlled with onboard electronics, enabling precise and adaptable delivery patterns, which are not yet possible by other means.

"The pace of progress in artificial intelligence is incredibly fast. Unless you have direct exposure to groups like Deepmind, you have no idea how fast—it is growing at a pace close to exponential. The risk of something seriously dangerous happening is in the five-year timeframe. 10 years at most.” —Elon Musk

RF sources 👉 Radio waves, which are part of the electromagnetic spectrum, consist of magnetic and electrical components. 👉 These carry information by varying a combination of amplitude, frequency and phase of the wave within a frequency band.  👉On contact with a conductor such as an antenna, electromagnetic (EM) radiation induces electrical current on the conductor’s surface, which is known as skin effect.

Harvesting Energy 👉 Energy harvesting is a process by which ambient energy present in the environment is captured and converted into electrical energy.  👉 Energy harvesting typically operates in milli-watt or even micro-watt power levels. 👉 Almost all energy-harvesting schemes require stages of power conditioning and intermediate storage batteries or capacitors that store energy harvested from the environment.

👉 Another reason that we haven’t made a complete switch from serial to USB is because it’s a dedicated interface. 👉 With USB, you have to set up all of your parameters so it recognizes that USB-based device when the system boots up. 👉 This is because it wants to be a plug-and-play device as outlined in the specification. However, that means you have to configure it for each port. 👉 With serial, you have a known fixed address and you lock the device down to that address and it doesn’t change. Hence, the operating system isn’t trying to figure out what that device is every time it boots up. 👉 With all that said, the serial port continues to be a popular and well supported interface connecting relatively low speed devices. 

Why Do New Boards Still Include Serial Ports? 👉 Serial ports, which is sometimes referred to as a COM port, has been present on boards and systems for a very long time. 👉 The first reason is that there are tons of devices out there that still use serial interfaces. For example, many of the sensors that ship today are still heavily relying on serial port connectivity. 👉 The serial interface is simple from the device side and requires only a UART and transceiver in most cases. This keeps serial sensor and data collection devices simple, low cost and reliable. 👉 One tangible example from one of our customers is in automated fork-lift equipment and other systems that use laser sensors for direction and proximity. Basically, they keep the fork lift from running over somebody using a sensor connected to the simple serial interface. It’s relatively fast, but it’s still simple. 

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👉 On the left, in transparent red, is the 3-dimensional contour plot of y2=x3-3x+z. 👉 The orange plane that intersects the 3D contour plot is shown on the right. 👉 The curve is “elliptic” everywhere except at the saddle point, where the curve transitions from a closed curve to an open curve.

What Is an Elliptic Curve? 👉 Elliptic curves are a class of curves that satisfy certain mathematical criteria.  👉 Specifically, a planar curve is elliptic if it is smooth and takes the commonly used “Weierstrass form” of  y2=x3+Ax+By2=x3+Ax+B  where 4A3+27B2≠04A3+27B2≠0 👉 You’ll often see these curves depicted as planar slices of what might otherwise be a 3D plot. 👉 You might notice that “elliptic curves” do not look like geometric ellipses.That is because “elliptic curves” take their name from a larger class of equations that describe these curves and the ellipses.

How Elliptic Curve Cryptography Works The reason that we use elliptic curves for the key exchange is because they allow longer keys to be generated with fewer bits of data exchanged between computers. 

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Here’s how good guys Alice and Bob can come up with a secret without bad guy Eve the eavesdropper figuring it out: 👉 First, Alice picks two prime numbers and transmits them to Bob -- anyone listening in can see the numbers. 👉 Next, Alice and Bob each choose a secret random number (a, b). Using exponentiation and modular arithmetic, Alice and Bob calculate two new numbers (A, B). 👉 At this point, Alice and Bob have each calculated half of the secret message and they transmit their results to one another—Eve can see the results as well, but they are useless to her. 👉nTo finish generating the secret, each person takes the other’s previous result and repeats the exponentiation and modular arithmetic to arrive at the same secret key. 👉 Each participant in the key generation generates part of the key and uses their partner’s result to calculate the rest. The order of calculation does not matter, both users arrive at the same result.

Combining Ideas 👉 Diffie & Hellman realized that it was possible to combine the ideas of modular arithmetic and exponentiation to create a shared secret on two different systems.   👉 Both the sender and receiver participate in the generation of the secret and share public data freely. 👉 At the end of the key generation process, both the good guys know what the secret key is, and the bad guy is none the wiser.