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Rajamanickam Antonimuthu
Attends National Engineering College, nalatinputhur, kovilpati, india
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The search engine Google is showing this interactive animated Doodle on May 4th, 2015 for celebrating 360th Birthday of Bartolomeo Cristofori.

Cristofori was an Italian musical instrument maker credited with inventing  the piano. One of his biggest innovations was creating a hammer mechanism that struck the strings on a keyboard to create sound. The use of a hammer made it possible to produce softer or louder sounds depending upon how light or hard a player pressed on the keys.  

Cristofori was born on May 4, 1655 in Padua in the Republic of Venice

The total number of pianos built by Cristofori is unknown. Only three survive today, all dating from the 1720s.

The piano as built by Cristofori in the 1720s boasted almost all of the features of the modern instrument. It differed in being of very light construction, lacking a metal frame; this meant that it could not produce an especially loud tone. This continued to be the rule for pianos until around 1820, when iron bracing was first introduced.

#piano #music #googledoodle   #bartolomeoCristofori  
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The search engine Google is showing this interactive animated Doodle on May 4th, 2015 for celebrating 360th Birthday of Bartolomeo Cristofori.

Cristofori was an Italian musical instrument maker credited with inventing  the piano. One of his biggest innovations was creating a hammer mechanism that struck the strings on a keyboard to create sound. The use of a hammer made it possible to produce softer or louder sounds depending upon how light or hard a player pressed on the keys.  

Cristofori was born on May 4, 1655 in Padua in the Republic of Venice

The total number of pianos built by Cristofori is unknown. Only three survive today, all dating from the 1720s.

The piano as built by Cristofori in the 1720s boasted almost all of the features of the modern instrument. It differed in being of very light construction, lacking a metal frame; this meant that it could not produce an especially loud tone. This continued to be the rule for pianos until around 1820, when iron bracing was first introduced.

#piano #music #googledoodle   #bartolomeoCristofori  
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Elon Musk unveils Powerwall, Tesla's Batteries for Home #technews
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"Password Alert" Chrome Extension to Protect your Google Account from Phishing Attacks

#googl #PasswordAlert #chrome

Google has announced "Password Alert", a free, open-source Chrome extension that protects your Google Accounts from phishing attacks.

 According to Google, the most effective phishing attacks can succeed 45 percent of the time, nearly 2 percent of messages to Gmail are designed to trick people into giving up their passwords, and various services across the web send millions upon millions of phishing emails, every day.

To help keep your account safe, Google is launching this Password Alert Chrome extension.  Once you’ve installed it, Password Alert will show you a warning if you type your Google password into a site that isn’t a Google sign-in page. This protects you from phishing attacks and also encourages you to use different passwords for different sites, a security best practice.

Once you’ve installed and initialized Password Alert, Chrome will remember a “scrambled” version of your Google Account password. It only remembers this information for security purposes and doesn’t share it with anyone. If you type your password into a site that isn't a Google sign-in page, Password Alert will show you a notice.
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 Tattoos stop Apple Watch from working

#TattooGate #applewatch #technews

Some Apple watch users are reporting that the Tattoos in wrists can prevent the proper functioning  of the  heart rate sensor of  Apple Watch.

Since the Apple  Watch uses your heart rate to determine whether you're wearing it, you might not be able to use Apple Pay, receive notifications, place calls, or use certain apps if you have tattoos on your wrists.

Some Apple Watch wearers on Reddit and Twitter complained about the tattoo issue, and Apple blog iMore confirmed that the problem exists.

According to Apple, the heart rate sensor in Apple Watch uses what is known as photoplethysmography. This technology,is based on a very simple fact: Blood is red because it reflects red light and absorbs green light. Apple Watch uses green LED lights paired with light sensitive photodiodes to detect the amount of blood flowing through your wrist at any given moment. When your heart beats, the blood flow in your wrist — and the green light absorption — is greater. Between beats, it’s less. By flashing its LED lights hundreds of times per second, Apple Watch can calculate your heart rate.

i-e Apple's heart rate sensor uses color to detect heart rate.  The ink pigmentation  in the Tattoo interferes with the sensor's ability to read your heart rate

For those who have issues with their wrists and still wish to use the Apple Watch, you can turn off Wrist Detection in the Apple Watch app to avoid the device auto-locking; unfortunately, that will also disable Apple Pay from use. Alternatively, you might try wearing it on a non-tattooed wrist.

Natural skin pigmentation doesn't block light the same way artificial ink pigment , so you shouldn't run into a problem if your skin is naturally darker.
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Interesting.  Now I'm glad I got through 4 years of the Marines without a tattoo.
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Rajamanickam Antonimuthu

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The 4 Things Every Entrepreneur should Follow.
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The search engine Google is showing this interactive animated Doodle on May 4th, 2015 for celebrating 360th Birthday of Bartolomeo Cristofori.

Cristofori was an Italian musical instrument maker credited with inventing  the piano. One of his biggest innovations was creating a hammer mechanism that struck the strings on a keyboard to create sound. The use of a hammer made it possible to produce softer or louder sounds depending upon how light or hard a player pressed on the keys.  

Cristofori was born on May 4, 1655 in Padua in the Republic of Venice

The total number of pianos built by Cristofori is unknown. Only three survive today, all dating from the 1720s.

The piano as built by Cristofori in the 1720s boasted almost all of the features of the modern instrument. It differed in being of very light construction, lacking a metal frame; this meant that it could not produce an especially loud tone. This continued to be the rule for pianos until around 1820, when iron bracing was first introduced.

#piano #music #googledoodle   #bartolomeoCristofori  
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Elon Musk unveils Powerwall, Tesla's Batteries for Home

#tesla #powerwall

US electric carmaker Tesla Motors has unveiled batteries that can power homes and businesses as it is trying to expand beyond its electric cars business.

Tesla's home battery system is named as "Powerwall".

Tesla Powerwall is a rechargeable lithium-ion battery designed to store energy at a residential level for load shifting, backup power and self-consumption of solar power generation. Powerwall consists of Tesla’s lithium-ion battery pack, liquid thermal control system and software that receives dispatch commands from a solar inverter.

The unit mounts seamlessly on a wall and is integrated with the local grid to harness excess power and give customers the flexibility to draw energy from their own reserve.

The average home uses more electricity in the morning and evening than during the day when solar energy is plentiful. Without a home battery, excess solar energy is often sold to the power company and purchased back in the evening. This mismatch adds demand on power plants and increases carbon emissions. Powerwall bridges this gap between renewable energy supply and demand by making your home’s solar energy available to you when you need it.

Current generation home batteries are bulky, expensive to install and expensive to maintain. In contrast, Powerwall’s lithium ion battery inherits Tesla’s proven automotive battery technology to power your home safely and economically. Completely automated, it installs easily and requires no maintenance.

Power companies often charge a higher price for electricity during peak evening hours than overnight when demand is low. Powerwall can reduce your power bill by storing electricity when rates are low and powering your home when rates are high.

Tesla will sell the 7kWh unit for $3,000 , while the 10kWh unit will retail for $3,500  to installers.  They go on sale in September, and the price does not include the inverter or the installation.
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Great explanation 
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Apple Confirms Tattoos Can Interfere With Apple Watch

#applewatch  
The Apple watch support page (https://support.apple.com/en-us/HT204666)  says "Permanent or temporary changes to your skin, such as some tattoos, can also impact heart rate sensor performance. The ink, pattern, and saturation of some tattoos can block light from the sensor, making it difficult to get reliable readings."
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Password Alert Chrome Extension to Protect your Google Account #Google #PasswordAlert
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Tattoos stop Apple Watch from working #AppleWatch #tattoo-gate
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Turning Salt water into Drinking water using Solar power

#technology   #desalination #desalprize

According to the Securing Water for Food agency, between 2000 and 2050 water demand is expected to increase 55 percent globally, meaning the number of people affected by water scarcity will continue to grow. By 2025, two-thirds of the world's population could be living in severe water stress conditions.

Around the world, there is more salty groundwater than fresh, drinkable groundwater. For example, 60 percent of India is underlain by salty water — and much of that area is not served by an electric grid that could run conventional reverse-osmosis desalination plants.

To find solution for this drinking water issue in developing countries, USAID  the U.S. Agency for International Development had run a global competion for Desal prize.

The idea for the competition was to create a system that could remove salt from water and meet three criteria: it had to be cost-effective, environmentally sustainable, and energy efficient.

The winners of the $140,000  first prize were a group from MIT and Jain Irrigation Systems. The group came up with a method that uses solar panels to charge a bank of batteries. The batteries then power a system that removes salt from the water through electrodialysis, that means that dissolved salt particles, which have a slight electric charge, are drawn out of the water when a small electrical current is applied.  

Using the sun instead of fossil fuels to power a desalination plant isn't a totally new idea. Larger solar desalination plants are being seriously investigated in areas where water is becoming a scarce resource, including Chile and California.But  the current technology is  expensive.

The MIT team's this new desalination technology "electrodialysis" is comparatively less expensive.

Both electrodialysis and reverse osmosis require the use of membranes, but the membranes in an electrodialysis system are exposed to lower pressures and can be cleared of salt buildup simply by reversing the electrical polarity. That means the expensive membranes should last much longer and require less maintenance. In addition, electrodialysis systems recover a much higher percentage of the water — more than 90 percent, compared with about 40 to 60 percent from reverse-osmosis systems, a big advantage in areas where water is scarce.
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In their circles
187 people
Have them in circles
993 people
fernando cespedes's profile photo
Suresh Parteti's profile photo
Athanasios Nidis's profile photo
David Lenefors's profile photo
Ashley Samuel's profile photo
matthew Schmitt's profile photo
Darren Brant's profile photo
Stacy Croy's profile photo
juzba jugnu's profile photo
Education
  • National Engineering College, nalatinputhur, kovilpati, india
    present
  • TMB McAvoy School, ottapidaram, Tuticorin District, India
  • John the baptist Hr. Sec. School, Puthiamputhur, Tuticorin District, India
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Web Development, Business, SEO, News Reporting, Software Testing
Rajamanickam Antonimuthu's +1's are the things they like, agree with, or want to recommend.
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