Raj Agrawal

Learnings from software development and technology.

  • Home
  • Technology
  • Software Development

Connect

  • Email
  • GitHub
  • Instagram
  • Twitter
  • YouTube

Powered by Genesis

Lithium-ion Batteries Smaller Than Your Finger Nail

October 31, 2013 by Raj Agrawal Leave a Comment

UPCOMING TECHNOLOGY – What is innovation? It is the act of improving something that is already established. The current generation of lithium-ion batteries are widely accepted as a preferred power source for portable consumer electronics. And such batteries have limitations when the overall output capacity, life cycle, safety and the application areas are considered. The following are some important researches from recent times that are aimed to optimise and expand the possible uses of lithium-ion batteries. 

Powerful microbatteries that size up to few millimeters only, and also charge instantly

ions
The illustration shows ions flowing between micro-electrodes in a lithium ion battery, in congruence with the research.

This was made possible by setting a balance between high power and high energy, which is difficult to achieve in the current generation of batteries. These microbatteries are also said to charge instantly, like 1000 times quicker. They could power wireless devices to transmit signals 30 times faster.

And how about using them to jump-start a dead car battery? Yes, that’s on the list too.

The application areas are, but not limited to consumer electronics and medical devices.

Via [Illionis.EDU]


 3D printing super-tiny lithium-ion microbatteries

3D printing has been used to demonstrate the possibility of printing miniature sized microbatteries, similar to a grain of sand. And the performance, with respect to charge and discharge cycles was found to be similar to commercial batteries.

Researchers produced inks for the anode and cathode from separate nano-particles. The 3D printer would then deposit the inks onto a comb shaped material. The battery was completed by packing the electrodes into a container and filling it with an electrolyte solution.

The application areas are both medical and non-medical industries.

Via [Seas.Harvard.EDU]

Filed Under: Technology Tagged With: lithium-ion

Zoho Projects – Free [Android] [iOS]

October 19, 2013 by Raj Agrawal Leave a Comment

‘There’s an app for that’. You’ve most likely heard this phrase at least once. If you’re a part of a team working on a project and finding a way to manage it on the go, then yes! There’s an app for that! Zoho as a company, has several web based products, and Zoho projects is one we’re discussing today. It’s a free web based project management/ collaboration tool, which is also available as a native application on smart phones. 

I’ll quickly share a brief summary of what the app is about. Zoho projects is perhaps one of the prettiest and functional project management tools for smart phones currently available on the web. To start using this Android/ iPhone project management app all you and your team needs is an Android or an iOS phone with an internet connection and team ready with the app setup on their phones. With these taken care of, you can quickly start creating and managing tasks, view live feeds with hot topics and people discussing them, share images, log your work time, get instant alerts to name a few. The following video from the company explains the concept of Zoho projects as project management tool:

Filed Under: Technology Tagged With: Android, iOS

BitDefender for Mac OS X – *Bleh*

August 9, 2013 by Raj Agrawal Leave a Comment

BitDefender Antivirus has been popular since it’s release on the Windows platform. It’s now available for Mac OS X too. Like most other third party security programs for Windows, BitDefender is definitely not the best. At least not all the time. You need to know that the efficacy of antivirus programs differ from time to time and with version to version. So is the OS X version of BitDefender good? Let’s take a look.

How good is BitDefender Antivirus for Mac?

Firstly, I’m no expert in software security. But, I do have a decent skill that helps me differentiate between a good and a bad software. This article is to share my experiences with an antivirus program, on a system that is seemingly strong enough to be on it’s own – Mac OS X. And take a note of Av-Comparatives.ORG. It is a great place to get in-depth and professional analysis on the popular anti-viruses in the market.

Here’s a PSA about any security program in general – keep away from security programs that claim 100% protection. No security program has ever existed to protect against all possible threats. 

The test drive

Considering the non-existence of any add-on security mechanism on my computer, I was curious and hoping there could be at least 1 infection. But seemingly, there wasn’t any! This could be due the goodness of OS X’s built in security, or it could be the poor detection technique of BitDefender. It’s hard to decide with no up-to-date benchmark reports available for the current version of BitDefender Mac (v 2.30.5095). And my experience isn’t enough to prove a software’s performance. But, Thomas at TheSafeMac.COM did run a test for a number of antivirus programs available for Mac. He did mention about the tests being non-comprehensive, but that doesn’t necessarily invalidate the results. His article points to poor detection rates by BitDefender for OS X (v 2.1).

Real-time protection – not so much

BitDefender for Mac has real time protection working only if the program’s running in the ‘foreground’. What this means is, if you like to normally close apps after using them, BitDefender will completely quit and you will have no real-time protection in action, which is quite strange.

Bottom line

We often hear about Mac OS X and Linux derivates being better than Windows with respect to security. Well, that’s a true fact. Mac OS X already does a very good job at keeping away infections and attacks without any need of a third party security mechanism. But, you must understand that a good job doesn’t imply a full-proof state of protection. And that’s where anti-viruses are still needed in the Macintosh world too. The answer to how good BitDefender is for Mac, lies in ambiguity for now. We need more data on tests and evaluations from authoritative websites for security programs on Mac OS X.

As an end user, do not fall for recommendations from advertisements or peers blindly. When you chose your security program, it’s wiser to educate yourself with the concept of detection rates, real-time protection and memory footprints. And concepts are simply understood if you can relate them to real life situations. For instance, detection rates could be explained as the ability of the special security forces (antivirus) to hunt down the bad guys. Good day.

Filed Under: Technology Tagged With: security

  • « Previous Page
  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • …
  • 40
  • Next Page »

Products I’ve ideated, designed and engineered

• Le Face Keyboard
• Dark Souls SoundBoard (NPC)

Open-source projects I maintain

• Material Design in Practice

Core engineering contributions in the past

• theAsianParent
• Collabb
• Inorbit
• Pretr Shop (Myntra)

Articles written on Medium

• Automatically-read-OTP from SMSes — Android 4.3 to 8.x