Balach Masud

What is Aspect Ration? The height and width on an image is referred to as the aspect ratio. It defines its overall shape, and it is usually shown as W:H where W is width and H is height. The most common aspect ratio today is 16:9, which means that if the width is divided into 16 equal parts, the height of the TV or picture should be 9 parts.   16:9 works great for TVs since that is the format modern TV shows are delivered on, but most movies are made using the cinema standard, which is 21:9. 21:9 is much wider, so parts of the screen need to be filled with black bars above and below the image in order to fit most TVs. These horizontal bars are called ''letterboxes''. Similar to movies, TV shows used to be made using a 4:3 aspect ratio, which is a lot more square than current TVs(this is why 16:9 is often called a widescreen aspect ratio). To fit modern TVs, vertical black bars or 'pillarboxing' is used. We've listed the most common aspect ratios in the t...

ID3 Algorithm: ID3 invented by Ross Quinlan used to generate a tree from a dataset. its precursor of C4.5 algorithm, used in machine learning and NLP domains. it begins with the original set S  as the root node. IT calculates the entrophy  H(S) (or information gain IG(S)) before, it iterates through every unused attributes of the set S on each iteration of algorithm. It n selects the smallest entrophy (or largest information gain)value. the set S is then spit by the selected attribute (e.g age is less than 50, age is between 50 and 100, age is greater than 100 ) to produce subsets of the data. The algorithm continues to recurse on each subset, considering only attributes never selected before.  INformation Gain in decision tree: it is used as mutual information, which is the expected value of the kullback leibler divergance of the univariate probability distribution of one variable from the conditional distribution of its variable given the other one. In general term...

VIrus: A computer program, which is capable of replicating with little or no user intervention. a piece of code causes damage to your computer either by deleting or corrupting files. it multiplies it self to to fill up disk space or randomly access memory space, secretly infecting your computer. these are disguised as games, images, email attachments, websites URls, shared files in instant messsages. Spyware: A computer program, it spies on you. after downloading itelf on your computer either an email you opened website you visited or a program you downloaded. it scans hardware for peronal information and your internet browsing habits. some spyware programs contain keyloggers that will record personal data you inter in to websites, such as password, usernames, email addresses, etc. Adware: Software, that, once installed, tracks your internet browsing history habits and sends popups containing ads related to sites and topics you have visited. it consumes and slows down your computers ...