It is believed that the first pyramid was built as a tomb for the Fourth Dynasty Egyptian pharaoh Khufu (often Hellenized as “Cheops”) and was constructed over a 20-year period. Khufu’s vizier, Hemiunu (also called Hemon) is believed by some to be the architect of the Great Pyramid. It is…

10 Reasons Your Website Get Hack 1. Cross site scripting (XSS) The problem: The “most prevalent and pernicious” Web application security vulnerability, XSS flaws happen when an application sends user data to a Web browser without first validating or encoding the content. …

Color psychology is the study of how certain colors impact human behavior. Different colors have different meanings, connotations, and psychological effects that vary across different cultures. Along with cultural differences, color psychology is largely impacted by personal preference. …

Jellyfish are invertebrates, which, together with corals, gorgonians and anemones belong to a group called the cnidarians. This animal group has stinging cells which they use both to capture their prey and also for self-defense. These cells contain a capsule in the interior of which there is a rolled up…

Decidability Problem of Turing Machines To be precise about the notion of what we mean by “computational problems” and what it means for a Turing machine to “solve” a problem, we define problems in terms of languages, which correspond to decision problems with a yes/no answer. We define two notions of “solving” a problem specified…

We describe Universal Turing Machine U as a 5-tape Turing machine so our universal Turing machine has four tapes: The input tape: a read-only tape containing the input, which is never overwritten; The description tape: a tape containing the description of M, which is written once at initialization time and…

In 1936 Alan Turing, a British mathematician, proposed the idea of an imaginary machine able to perform all kinds of computations on numbers and symbols. Turing Machine (TM) is defined by a set of rules which define the behavior of the machine on an input/output tape. The tape is divided…