four-cycle
111Ulster Cycle — The tales of the Ulster Cycle belong to the genre of heroic legend and mythology and represent some of the finest examples of the medieval Irish epic that have survived. Rather than being presented as single tales, Irish mythology is organized …
112Nuclear fuel cycle — The nuclear fuel cycle, also called nuclear fuel chain, is the progression of nuclear fuel through a series of differing stages. It consists of steps in the front end, which are the preparation of the fuel, steps in the service period in which… …
113Life cycle assessment — A life cycle assessment (LCA, also known as life cycle analysis, ecobalance, and cradle to grave analysis) is the investigation and valuation of the environmental impacts of a given product or service caused or necessitated by its existence.… …
114Rankine cycle — The Rankine cycle is a thermodynamic cycle which converts heat into work. The heat is supplied externally to a closed loop, which usually uses water as the working fluid. This cycle generates about 80% of all electric power used throughout the… …
115Ericsson cycle — The Ericsson Cycle is named after inventor John Ericsson, who designed and built many unique heat engines based on various thermodynamic cycles. He is credited with inventing two unique heat engine cycles and developing practical engines based on …
116Sothic cycle — The Sothic cycle or Canicular period is a period of 1461 ancient Egyptian years (of 365 days each) or 1460 Julian years (averaging 365.25 days each). During a Sothic cycle, the 365 day year loses enough time that the start of the year once again… …
117Estrous cycle — Oestrus is also the biological genus name of the gadfly. The estrous cycle (also oestrous cycle; derived from Latin oestrus and originally from Greek οἶστρος meaning sexual desire) comprises the recurring physiologic changes that are induced by… …
118Deverry Cycle — US Cover for the first book, Daggerspell Daggerspell Darkspell The Bristling Wood The Dragon Revenant A Time of Exile A Time of Omens Days of Blood and Fire Days of Air and Darkness The Red Wyvern The Black Raven …
119America's Next Top Model, Cycle 12 — Promotional photograph of the cast of Cycle 12 of America s Next Top Model Format Reality television Created by Tyra Banks …
120Ulster Cycle — Topics in the Ulster Cycle Ulster characters Amergin mac Eccit Athirne Blaí Briugu Briccriu Cairbre Cuanach Cathbad Celtchar Cethern mac Fintain Conall Cernach Conchobar mac Nessa Condere mac Echach Cruinniuc Cú Chulainn Culann Cúscraid Dáire mac …
