Posted in Interesting, Open Source, Softwares, Web Tech

Digital footprint

What is digital footprint?

So, you are an active internet user. You have atleast one social media account and in some point of time have uploaded a photo, shared a video, have liked/commented on friend’s post. Also, the likes on a post,  private chat messages, the online shopping search of your favourite brand etc. Aren’t these the activities we, as individual’s tend to do to be connected and engaged or in search of something online? In simple terms, all this content builds up what is called as digital footprint.

That means, digital footprint also referred as digital shadow is a content (text or audio or video) with a set of traceable digital activities of an individual on the digital devices or any internet platform. That is, the stuff  what you leave behind when you use online services for online shopping, social networking etc.

Why should you be concerned about digital footprint?

Once you are logged into any website be it for online shopping or listening to a trending song, remember that web is secretly tracking all your actions allowing the targeted marketers to advertise exactly what products you have been browsing in you recent past. Also social media platforms often introduce new policies of usage that we may tend to accept just by clicking Accept/Ok button without actually reading the policies. User privacy is a concern.

All this data can be leaked to make a profit out of it for research in terms of marketing products and building it better for human convenience where a set of customers habits and user experience can be traced.

Can we avoid not being eavesdropped?

As suggested by one of my friend you may say as well, if privacy is a concern browse without login into websites, use browser’s incognito mode, clear browser history. That doesn’t solve the problem at base level as there is this loophole: every device has a unique IP address and uniquely the browsed content can be easily traced.

Posted in Interesting, Open Source, Programming, Softwares, Web Tech

Web browsers and JavaScript engine

What is a JS engine?

A Javascript engine is a computer program that executes JS code in a web browser. The engine is developed by web browser vendors.

The first JavaScript engine was created by Brendan Eich in 1995 for the Netscape Navigator web browser. This has evolved to be known as SpiderMonkey engine used by Firefox.

In general, JS engines are also known as ECMAScript engines. As many web browsers there are, so are the JS engines.

  • Google chrome has V8 engine.
  • Mozilla Firefox has SpiderMonkey
  • Microsoft Edge and Internet Explorer has Chakra
  • Apple Safari has JavaScriptCore
  • Opera has Carakan(pronounced Tsharakan)

Each JS engine works in a more or less similar fashion. But, the most popular being V8 engine which used in Chrome and Node.js

Posted in Interesting, Softwares

SOS Save Our Soul

In general, SOS is a Morse code signal used internationally to indicate distress. This was originally used for maritime industry. Now a days, we see the SOS as one of the feature in mobile devices such as smartphones and smartwatches.

To use the SOS feature user can set up a list of emergency contacts. Most of the mobile device vendors have this feature enabled on press of power button. In case of emergency situation, when power button is pressed continuously certain number of times, quick alert is sent to user’s contacts about the distress or panic.

Posted in Interesting

Big Data: how big is it and what is the Big Deal ?

Data, A collection of facts from which conclusions may be drawn. Data can be words, numbers, observations or description of things. Data can be categorized in many forms: text, sound, picture, video etc. The world is awashed and updating with electronic information, be it social networking sites, blogs, news or any other form.


How can value be gained from data?
The big question is that the large volumes of data need to be stored for retrieval. The massive growth in data offers a great technology breakthroughs, better business models with better retrieval from this massive storage.

This is what happened on Facebook in the last few minutes so many things at one time – links shared, event invites, friend requests, photos uploaded, messages sent,tags, status updates and comments.

There are many data giants like Facebook that are being exposed to massive amounts of data like above. Such companies and agencies have to support, store, analyze and make decisions using large amounts of data is called Big Data.

Its a Big Deal because, using Big Data one can build better products, offer better services and predict the future better. All this means Big Money. So Big Data is a Big Deal.