Category Archives: Uncategorized

The Difference between a Megabyte (MB) and a Megabit (Mb)

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One thing that often gives people confusion is the difference between a Megabyte (used for file size) and a Megabit (used for download speeds). People often assume that a download speed of 1 Megabit per second (1 Mbps) will allow them to download a 1 Megabyte file in one second. This is not the case, a Megabit is 1/8 as big as a Megabyte, meaning that to download a 1MB file in 1 second you would need a connection of 8Mbps. The difference between a Gigabyte (GB) and a Gigabit (Gb) is the same, with a Gigabyte being 8 times larger than a Gigabit.

To calculate how long it will take a file to download over your connection, you can use Google’s simple MB/Mb converter

Cloudflare – Creating a better web and supercharge your website (Free & Premium plan)

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  • CloudFlare protects and accelerates any website online. Once your website is a part of the CloudFlare community, its web traffic is routed through our intelligent global network. cloudflare automatically optimize the delivery of your web pages so your visitors get the fastest page load times and best performance. cloudflare also block threats and limit abusive bots and crawlers from wasting your bandwidth and server resources. The result: CloudFlare-powered websites see a significant improvement in performance and a decrease in spam and other attacks.
  • Services include CDN, Optimizer, Security, Analytics, apps also enterprise plans there.
    Ref:

VigLink – Powering content driven commerce

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  • VigLink is the platform on which site-to-site clicks are priced, bought, and sold.
  • VigLink’s content monetization solution connects potential consumers to products by hyperlinking particular keywords in a website’s content.
  • The company’s technology, VigLink Insert, scans a page for words that could be potentially profitable to the publisher of the page, and connects the keyword with a product from an affiliate program. The publisher is paid when a reader clicks a link contained in the content to buy or learn more about a service or product.
  • VigLink also offers an outbound analytics service for clients to understand where readers go when they leave their site

    Ref : 

        Official site : https://www.viglink.com/

Why name Apache?

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From wikipedia

According to the FAQ in the Apache project website, the name Apache was chosen out of respect to the Native American tribe Apache and its superior skills in warfare and strategy. The name was widely believed to be a pun on A Patchy Server (since it was a set of software patches), but this is erroneous. Official documentation used to give this very explanation of the name,but in a 2000 interview, Brian Behlendorf, one of the creators of Apache, set the record straight:

The name literally came out of the blue. I wish I could say that it was something fantastic, but it was out of the blue. I put it on a page and then a few months later when this project started, I pointed people to this page and said: “Hey, what do you think of that idea?” … Someone said they liked the name and that it was a really good pun. And I was like, “A pun? What do you mean?” He said, “Well, we’re building a server out of a bunch of software patches, right? So it’s a patchy Web server.” I went, “Oh, all right.” … When I thought of the name, no. It just sort of connotated: “Take no prisoners. Be kind of aggressive and kick some ass.”

From web archive

The Apache group was formed around a number of people who provided patch files that had been written for NCSA httpd 1.3. The result after combining them was A PAtCHy server.

Ref:

http://web.archive.org/web/19970415054031/www.apache.org/info.html

http://en.wikipedia.org/wiki/Apache_HTTP_Server#Name

ராஜா ராஜ்யம்

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ராஜா எப்போதும் ராஜா தான்

purushothkn's avatarpurushothkn

ரசனை நம் தாத்தா ,அப்பா ,பேரன் முதல் கண்டிப்பாக வேறுபடும்.பாகவதர் முதல் ரகுமான் வரை இசையில் கொடி நாட்டியவர்கள் பல அதில் இன்றும் நிலைத்து நிற்பவர்கள் சில. அப்படி “சில” த்தின் ராஜா தான் நம் இசைஞானி.லண்டனுக்குப் போய் இசையை கற்றுகொண்டு வந்தாலும் சிலர் அமைக்கும் இசைஅவர்களாலேயே கேட்க முடியாத அளவிற்கு ரம்மியமாக(???) இருக்கிறது. அப்படி இருக்கையில் பண்ணைபுரத்தில் இருந்து கூட ஒரு பீத்தோவன் வர முடியும் என்பதற்கு ராஜாவைத் தவிர வேறுயாரு சான்று. அவரின் படைப்புகளை தரவரிசை படுத்த எவராலும் முடியாது.இருப்பினும் எனது ப்ளே லிஸ்டில் அதிகமாக கேட்கப்பட்ட பாடல்கள் என்ற வகையில் ஒரு தரவரிசை
10. ராஜ ராஜ சோழன்-ரெட்டைவால் குருவி
9.மண்ணில் இந்த காதல்-கேளடி கண்மணி
8.கண்மணியே காதல்-ஆறிலிருந்து அறுபதுவரை
7.ஆலபோல்- எஜமான்
6.சுந்தரி கண்ணால்-தளபதி
5.பூங்காற்று புதிதானது-மூன்றாம் பிறை
4.என் வானிலே-ஜானி
3.மன்றம் வந்த-மௌன ராகம்
2.நீ பார்த்த பார்வை-ஹே ராம்
1.தென்றல் வந்து தீண்டும்போது-அவதாரம்

இதில் முதல் இரண்டு பாடல்கள் ராஜாவின் ஆளுமையை உலகமறிய செய்தவை.”நீ பார்த்த பார்வைக்கொரு நன்றி” ஒரு கேன்வாஸ் பெய்ன்டிங் போல விரிந்து வார்த்தைகள் வற்றி காதல் மட்டுமே மிஞ்சிய நிலைக்கு நம்மை இட்டு செல்லும்.”தென்றல் வந்து தீண்டும்போது” தூரிகையில் தேன் வடித்து இழைத்த ஓவியம்.
பாடல்கள் பல ராஜாவின் மகுடங்களாக இருப்பினும் அதில் வைரமாக இருப்பது அவரின் பிண்ணணி இசை. இப்போது பிண்ணணி இசை என்பது படம் பார்ப்பவரை படுக்க…

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Video Annotation

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Video Annotations is a new way for you to add interactive commentary to your videos! Use it to:

  • Add background information about the video
  • Create stories with multiple possibilities (viewers click to choose the next scene)
  • Link to related YouTube videos, channels, or search results from within a video
  • All of the above!

You control what the annotations say, where they appear on the video, and when they appear and disappear.

Ref:

http://www.youtube.com/t/annotations_about

https://support.google.com/youtube/answer/92710?hl=en

 

Microsoft Virtual WiFi Miniport Adapter

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Virtual WiFi is a technology that virtualizes your network adapter much in the same way VMWare virtualizes your entire operating system. Once virtualized, you can basically convert one physical wireless adapter into two virtual ones. This allows you to then connect one virtual network adapter to your regular wireless network and use the other virtual adapter to connect to another network such as an ad-hoc network or to create a WiFi hotspot and allow other to connect to your Windows 7 machine wireless like they would connect to a normal wireless access point.

Creating your own wireless access point, you can go about it in two ways: use the command line in Windows 7

  • The first thing you can to do is share the Internet connection on your main network adapter so that when people connect using the virtual network adapter, they will be able to access the Internet through your Windows 7 computer. You can do this by going to
    * Network and Sharing Center and clicking on
    * Change Adapter Settings. Click on the network-right click -properties
    * Sharing tab and check the box that says
    * Allow other network users to connect through this computer’s Internet connection.
    * under Home networking connection, make sure to pick the name of the virtual WiFi mini port adapter. It may be something like Wireless Network Connection 2 or 3, etc.
    * Now to setup the wireless access point on the virtual network adapter, open the command prompt (Start, type run[run as adminstrator,Press and hold down the SHIFT key while you right-click the program icon, and then click Run as.]) and type in the following command:

    netsh wlan set hostednetwork mode=allow ssid=VirtualNetworkName key=Password

    In the line above, you need to change VirtualNetworkName to the desired name of your wireless network and change Password to whatever password you want on the network. Note that all virtual wireless access points have to use WPA2-PSK (AES) encryption no matter what. Once it has been setup, you can enable it by typing in the following line:

    netsh wlan start hostednetwork

    To see details about the hosted network, such as how many clients are connected, type in the following command:

    netsh wlan show hostednetwork

    And that’s about it! Other users should now be able to see your newly created wireless access point in their list of wireless networks. They should also be able to connect and connect to the Internet.

    Ref:

  • Run as Administrator: http://support.microsoft.com/kb/305780
  • http://helpdeskgeek.com/windows-7/what-is-microsoft-virtual-wifi-miniport-adapter/

    • Time Complexity

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    Constant Time
    An algorithm is said to be constant time (also written as O(1) time) if the value of T(n) is bounded by a value that does not depend on the size of the input
    T(n)=O(1).
    For example, accessing any single element in an array takes constant time
    the number of elements is known in advance and does not change, however, such an algorithm can still be said to run in constant time.
    Linear Time
    T(n)=O(n)

    src:
    http://en.wikipedia.org/wiki/Logarithmic_time#Logarithmic_time

    Data Structure Tree Basics

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    Data Type-List
    Data Strucutre-Linked List

    Tree:
    As a data type, a tree has a value and children, and the children are themselves trees; the value and children of the tree are interpreted as the value of the root node and the subtrees of the children of the root node.
    As a data structure, a linked tree is a group of nodes, where each node has a value and a list of references to other nodes (its children). This data structure actually defines a directed graph,[a] because it may have loops or several references to the same node, just as a (corrupt) linked list may have a loop. Thus there is also the requirement that no two references point to the same node (that each node has at most a single parent, and in fact exactly one parent, except for the root), and a tree that violates this is “corrupt”.
    a tree is always non-empty, but a reference to a tree may be null.
    Recursive
    As a Data Type

    • t: v [t[1], …, t[k]] -(A tree t consists of a value v and a list of other trees.)
    • f: [t[1], …, t[[k]]
      t: v f -(a tree can be defined in terms of a forest (a list of trees), where a tree consists of a value and a forest (the subtrees of its children):

    As a data structure

  • n: v [&n[1], …, &n[k]] -((A node n consists of a value v and a list of other references to other nodes.)

    • Terminology
    node:
    An internal node (also known as an inner node, inode for short, or branch node) is any node of a tree that has child nodes.
    External node (also known as an outer node, leaf node, or terminal node) is any node that does not have child nodes.
    height of a node is the length of the longest downward path to a leaf from that node. The height of the root is the height of the tree
    The depth of a node is the length of the path to its root (i.e., its root path

    Ref:
    http://mathworld.wolfram.com/RootedTree.html
    http://en.wikipedia.org/wiki/Tree_(data_structure)