Li-Fi – The Future of Wi-Fi

Li-Fi – The Future of Wi-Fi

Li-Fi is the great new marketing term for what has been known and referred to as VLC (visible light communication) for decades. It’s basically the same principle as communicating with ships by shuttering lanterns and using morse code.

Li-Fi is essentially communication using ultra-fast pulses of light and a photosensor. Any communication is essentially being able to send structured packets of data via binary pulses. Just like with dimming an LED, where you adjust the duty cycle, i.e. the ratio of on/off time of the rapid flashing of the light (see: pulse width modulation), there is a controller on the light which adjusts the rate and width of the pulses.

If a light is hooked up to an internet connection and has the required circuitry, it is possible to use the duration and frequency of these pulses to send encoded information, i.e. data, to a photoreceptor on, say, your laptop, where the computer will decode the light pulses into a data connection, and communicate back with its own pulses.

All of this is invisible to the naked eye due to either the frequencies being too fast to detect (see: flicker fusion rate), or they are dim. The benefits of Li-Fi include that there is much more available ‘spectrum’, whereas Wi-Fi is limited to a narrow band of rf. Li-Fi is also more secure than Wi-Fi due to the necessity of being in the environment to receive the data (light does not pass through walls), and it is also quite quick, ranging from gigabits for direct to 10s of megabits for indirect light exposure.

It’s quite the field at the moment! The tech is fascinating and forecast to explode in the next several years, but there are of course limitations. The first consumer products were demonstrated this year, but we don’t foresee you finding at your local store for another year.

Li FI

Most interesting applications we’ve seen for Li-Fi are communications between cars (particularly self-driving) through headlights. As you can imagine, this makes sense because the line of sight is constrained, and the range can be superior in certain cases where you have objects going past each other and out of range at high speeds. This is made easier by the fact that LASER headlights seem to be the future, rather than LED.

For instance, the very quick rates used for Li-Fi (and even for fiber optic data transmission cables) have special hardware for blinking quickly.

In terms of the actual silicon itself, it’s in the nanoseconds ideally, but depends on the manufacturing, crystallinity, etc. Keep in mind that LEDs are at their core electrical devices. Also, if you add phosphor (like in white LEDs), then the time will be EXTRAORDINARILY lengthened by the fact that the phosphor is basically glow-in-the-dark goop that will slowly dim as it is ‘de-charged’.

Note : We are not sure if its primetime for Li-Fi yet. What we’re sure is that they’d find a way-out to get it worked as soon as possible for in the market!

Things You Should Know About Top-Level Domains

Things You Should Know About Top-Level Domains

The general sense is that .com is becoming quite crowded. Almost every domain name that is 6 letters or less is taken and it’s difficult to fight with domain squatters, etc.
Since it would be EXTREMELY cost prohibitive for domain squatters to register TLD’s (the cost is about a quarter million per name), this issue should basically disappear.
It’s basically a vanity DNS root name for big companies and countries (though countries already have their own TLDs).

Btw once you buy a domain name you will need a hosting and what better hosting you can get than Server Bundle, we have 99% uptime and round the clock maintenance support, Try us to get fully managed dedicated hosting by us

There’s nothing from a technical perspective that you can do with a .com which you can’t do with a .club domain. You really only need to consider two things when buying a domain name:

1) Is it memorable, and meaningful? It sounds like you could spin a .club domain for your purposes successfully.
2) Who owns the other TLDs? If you buy a .club because the .com is taken by a company completely unrelated to your field and harmless then you’re fine. If it’s taken by a competitor or someone you don’t want associated with your business then you run the risk of confusion.

Benefits:

The process supposedly add choice and it doesn’t make a difference by adding that choice and if history tells us anything it will make very little difference. How many users heard of .travel .aero .jobs .museum .cat? All existing TLDs have been around for years.
You have sub-domains (www., movies., play.,), domains (Google, Bing, Apple) and now essentially top-level-domains (.com, .net) up for purchase. It can allow companies more freedom with the naming of their websites and hopefully allow new companies to flourish.
Top Level Domain
What difference do TLDs make:

First of all, don’t focus on choosing a top level domain with regards to ranking because TLDs don’t really matter for ranking. Second, the use of unrestricted generic TLDs (.com, .net, .org, .info) doesn’t adhere to their original intentions at all anymore, so you don’t need to be a business or network provider to use them. For a blog about an idea, any of them will work (for example http://*put name of this website in here*)
Instead, think about who you’re writing for and choose a domain name and TLD that will be meaningful and easy to remember for them. Another rule of thumb – if there’s already an established presence on a TLD you want don’t just use another TLD; if it’s an inactive site go for it, but if they’re actively associated with the name then it may be hard to unseat them.
ICANN is also releasing loads of new gTLDs all the time. You can also delve into the popular country level domains (.io, .ly, .me, .es, .is, etc)

Circumstances when using TLDs work well:

•Emphasis on the digital: Needing to be explicit about the web version of a company or publication, or explaining what the actual address is to someone.
•Branding: Some websites set out to make the TLD part of their brand, while others don’t.
•Shorter URLs: For us anyway, We seem more likely to include the TLD if the address is shorter.

5 Best Forum Hosting Software

5 Best Forum Hosting Software

Forum is an old school way of interacting with people, back in the early days forums is considered as like a social media today, you can host your Forum in one of the servers of Server Bundle seamlessly and in an affordable cost

Discourse : Discourse brings many improvements:

  • Dealing with off-topic posts: Reply as a linked topic.
  • Gamification/built-in trust system: Automatically prevents trolls, spammers, and bad actors from taking over.
  • Get notifications when your name is mentioned.
  • Login with Facebook etcetera.
  • When you return to a topic, Discourse lets you start reading right where you left off.
  • Start writing a reply, continue later perhaps on a different computer.
  • Works on mobile device using web browser. No app download required.
  • Application programming interface.
  • Replies and parent-posts can be shown “inline” just next to the post you’re reading.
  • Drag and drop images.
  • Real time updates.
  • Pasted links automatically expand to provide additional context and information.
  • Every link in Discourse shows a click count.

Vanilla Forums : Vanilla seems to have already implemented fairly many features that Discourse has? These interesting features are, however, “hidden” on a 20 page long listing, together with many other not-terribly-interesting features.

  • Dealing with off-topic posts: If a post gets enough off-topic votes, it is “buried”, so it won’t derail the discussion.
  • Gamification/built-in trust system: Users gain reputation by contributing to the forum. Higher reputation –> new abilities. For example, if you star a very popular topic, you gain reputation.
  • Get notifications when your name is mentioned.
  • Login with Facebook etcetera.
  • When you return to a topic, Vanilla puts you right where you stopped reading the last time.
  • Vanilla auto-saves your content as you are entering it.
  • Works on mobile device using web browser. No app download required.
  • Application programming interface.
  • Automated bot, and/or trusted members, handle spam & abuse moderation.
  • Questions & answers type questions.

Project Ivory :

  • Single page layout, with interesting interface based around functions you need to access quickly being docked at the edges of the window.
  • New threads at top by default, then a homebrew best sort.
  • Reddit style user pages.

Retroshare :

  • Fully distributed friend-to-friend.
  • Eavesdropping-secure communication.
  • Chat, file-sharing, etc. functionality, but also something bulletin-board like.
  • People can only see topics that their friends have posted or subscribed to, so better topics become more visible by spreading through the friend to friend network.
  • Anonymous posting possible.

Debiki :

  • Arrows makes it easy to understand how comments relate to each other, and to scroll back to the parent reply (you don’t have to count indentation levels — follow the arrow instead).
  • Intended to work well also when the discussion grows huge: A two dimensional layout gives a good overview (but people complain about scrolling horizontally). And comments are sorted by upvotes, using a novel and fair sorting algorithm (not yet implemented), and less interesting comments are collapsed. So even if a forum topic is too huge to be read in whole, you could simply start reading, and you’d then read the most interesting comments first, and when you’re done reading you wouldn’t be wondering “what was it I missed”.
  • It’s supposed to be a debate wiki, where people can edit or suggest edits to each other’s comments, and collaboratively collapse uninteresting subthreads. (Only somewhat implemented.)

Some Free And Honorable Mentions:

  • Our favorite right now is Xenforo. It does cost money for a license but it’s fantastic, clean, well-engineered and very modern compared to most other options. It was written as a total grounds-up rewrite of vBulletin by a core team of former vB developers who were frustrated with how crappy vB was and wanted to start over from scratch.
  • The best free option is probably still phpBB. SMF is also decent. We recommend avoiding vBulletin and IP.Board.
  • If you like WordPress and want to manage your site and community in the same system, there is a great forum plugin BBPress that is actively maintained and easily customizable.
5 Alternative Of WordPress For Your Blogs That Are Incredibly

5 Alternative Of WordPress For Your Blogs That Are Incredibly

WordPress is so far ahead in my honest opinion. Just start with a clean theme from scratch using the Codex and it’s basically headache-free. You need to realize that everything WordPress needs is outside the theme. Just create a style.css with the necessary information at the top (Theme name: Your theme etc), and then crank out that html and php on a blank slated index.php. Ahhh! peace of mind. However, there are some best alternative for you in different aspects to wordpress:

(more…)

How To Optimize Magento Performance

How To Optimize Magento Performance

Things beginners should do at first:

Here’s a free extensions stack that will get you started:

EXTENSIONS

all of these can be installed using modman.

This is probably only half the battle though. You really need to learn how to manage the server aspect as well.

Buy Affordable Website Hosting At Unbeliveble Price

Now, go forth and do a good amount of research then to meld all these elements together.

If anyone is wondering why Turpentine and Varnish is not a part of our suggestion(s), well, using them in conjunction with any FPC yields to unexpected caching and over-optimizations unless you really know how to actually make it work in synergy. Plus scripting Varnish really well is really way, way down the line, and the added difficulty to support SSL is another problem. Let’s not confuse the beginner, shall we?

Things you should do :

We are a Magento developer and aforementioned are all very good advice, and is almost identical to our standard setup. We would add to this:

  • Remember to delete old files in “var/session/”. Create a simple cron job to delete, say, 20 day old files in that folder. Why? Because server will refuse to write new files when inode table is full. And itwill fill up on a decently trafficked site.
  • Watch your MySQL server closely. Use scripts liketuning-primer and mysqltuner for advice on what server variables to tweak.
  • Profile your sites using Xdebug on your dev server. It will teach you a whole lot when it comes to identifying what calls are resource intensive. It will make you a better developer.
  • Install Munin plugins to monitor your server. Remember the PHP and PHP APC related ones.
  • Always run PHP as a FastCGI Process Manager (FPM) and consider using Nginx if you are not using Varnish. Get comfortable playing around with FPM pool config (number of child servers to start, how many processes per pool to run etc.)

Things you should take care of:

  • Never use shared hosting. It’s critical you have root access.
  • Do not modify core code. It makes upgrading terrible.
  • Use modman. (We also use git sudmodules to keep our extensions separate from the core code.)
  • Use apc opcode cache.
  • Use redis as your caching layer.
  • Ideally use varnish to at least serve your product pages (although this does cause issues with messages and any other page content which should not be cached).
  • Use OnePica ImageCDN.
  • Depending on the size of your product catalog, whether you have to import products from a legacy system, how often products need to be changed, etc. you may want to consider Unirgy Rapidflow Pro.