First-past-the-post voting

A first-past-the-post (abbreviated FPTP, 1stP, 1PTP or FPP), or winner-takes-all, election is one that is won by the candidate receiving more votes than any others. It is a common, but not universal, feature of electoral systems with single-member legislative districts. Large countries widely using FPTP include India, United States, United Kingdom and Canada.

Overview

The first-past-the-post voting method is one of the several plurality voting systems.

Confusion in terminology often exists between highest vote, majority vote and plurality voting systems. All three use a first-past-the-post voting method, but there are subtle differences in the method of execution. First-past-the-post voting is also used in two-round systems and some exhaustive ballots.

First-past-the-post voting methods can be used for single and multiple member elections. In a single member election the candidate with the highest number, not necessarily a majority, of votes is elected. The two-round ("runoff") voting system uses a first-past-the-post voting method in each of the two rounds. The first round determines which two candidates will progress to the second, final round ballot.

Picture Transfer Protocol

Picture Transfer Protocol (PTP) is a protocol developed by the International Imaging Industry Association to allow the transfer of images from digital cameras to computers and other peripheral devices without the need of additional device drivers. The protocol has been standardised as ISO 15740.

It is further standardized for USB by the USB Implementers Forum as the still image capture device class. USB is the default network transport media for PTP devices. USB PTP is a common alternative to USB MSC, as a digital camera connection protocol. Some cameras support both modes.

Description

PTP specifies a way of creating, transferring and manipulating objects which are typically photographic images such as a JPEG file. While it is common to think of the objects that PTP handle as files, they are abstract entities identified solely by a 32-bit object ID. These objects can however have parents and siblings so that a file-system–like view of device contents can be created.

PTPRS

Receptor-type tyrosine-protein phosphatase S, also known as R-PTP-S, R-PTP-sigma, or PTPσ, is an enzyme that in humans is encoded by the PTPRS gene.

Function

The protein encoded by this gene is a member of the protein tyrosine phosphatase (PTP) family. PTPs are known to be signaling molecules that regulate a variety of cellular processes including cell growth, differentiation, mitotic cycle, and oncogenic transformation. This PTP contains an extracellular region, a single transmembrane segment and two tandem intracytoplasmic catalytic domains, and thus represents a receptor-type PTP. The extracellular region of this protein is composed of multiple Ig-like and fibronectin type III-like domains. Studies of the similar gene in mice suggested that this PTP may be involved in cell-cell interaction, primary axonogenesis, and axon guidance during embryogenesis. This PTP has been also implicated in the molecular control of adult nerve repair. Four alternatively spliced transcript variants, which encode distinct proteins, have been reported.

Tak

Tak or TAK may refer to:

Places

People

Entertainment

Transport

List of Invader Zim characters

Invader Zim is an American animated television series created by Jhonen Vasquez and originally aired on Nickelodeon. The recurring cast includes long-term Nickelodeon voice actors Richard Steven Horvitz and Rodger Bumpass, with live-action television actors Kevin McDonald (The Kids in the Hall) and John de Lancie (Star Trek: The Next Generation). Vasquez voices parts in the show. The show was cancelled early in its run and some episodes were unfinished. The show ran for two seasons before its cancellation.

Main characters

Zim

Zim (voiced by Richard Steven Horvitz,Billy West in the pilot and Melissa Fahn as a smeet in "Parent Teacher Night") is an incompetent Irken invader who is foul-tempered, overzealous, impulsive, megalomaniac, and convinced of his own greatness. He dreams of regaining his leaders' trust by taking part in Operation Impending Doom II, so Zim is assigned to Earth, a planet which the Almighty Tallest believe has little to no chance of existing. However, against all odds, Zim makes it to Earth and establishes a base on a fake conquest mission. Because of his very small stature, Zim disguises himself as a human child using a hairpiece to cover his antennae and contact lenses to make his eyes look normal.

Tak (function)

In computer science, the Tak function is a recursive function, named after Ikuo Takeuchi (竹内郁雄). It is defined as follows:

This function is often used as a benchmark for languages with optimization for recursion.

tak() vs. tarai()

The original definition by Takeuchi was as follows:

tarai is short for tarai mawashi, "to pass around" in Japanese.

John McCarthy named this function tak() after Takeuchi.

However, in certain later references, the y somehow got turned into the z. This is a small, but significant difference because the original version benefits significantly by lazy evaluation. Though written in exactly the same manner as others, the Haskell code below runs much faster.

You can easily accelerate this function via memoization yet lazy evaluation still wins.

The best known way to optimize tarai is to use mutually recursive helper function as follows.

Here is an efficient implementation of tarai() in C:

Note the additional check for (x <= y) before z (the third argument) is evaluated, avoiding unnecessary recursive evaluation.