Vision-Based Fuzzy 2D Motion Control of a Model Helicopter

©2006 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or distribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE. This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder.Presented at NAFIPS 2006 : 2006 Annual Meeting of the North American Fuzzy Information Processing Society : Montréal, Canada, 3-6 June 2006.DOI: 10.1109/NAFIPS.2006.365497In this paper the 2D motion of a model helicopter is studied. The position control of a 2D model helicopter falls into complex nonlinear problems domain which makes it rather hard. In this paper a fuzzy controller is proposed to stabilize the helicopter on a designated target. The 3D model of the helicopter is simplified to derive a 2D model and all the states are assumed to be measurable. Based on the model, it was possible to decouple the position and orientation control of the helicopter. However the two parts are related through a fuzzy rule base. To verify the proposed method a simulation program is written in C++ which takes advantages of OpenGL to enable having 3D features. The response graphs are then presented       

Time to Call into Question the Fundus-based Evaluation of Diabetic Retinopathy after Intravitreal Injections

This is an Editorial and does not have an abstract

Gollum from Medieval Tragedy to Liberal Tragedy in J. R. R. Tolkien’s \u3ci\u3eThe Lord of the Rings\u3c/i\u3e

J.R.R. Tolkien’s legendarium represents different archetypal myths that constitute a diverse treasury of literary genres. Tragedy in variegated forms also appears in many of his mythological tales and characters. Gollum in The Lord of the Rings experiences a unique instance of tragedy when it is compared with Tolkien’s earlier sketches of the genre. We demonstrate that the character Gollum sustains a twofold type of tragedy that originates from Tolkien’s perception of medieval and modern spirits of thought. Raymond Williams in Modern Tragedy draws upon historical traditions of tragedy to survey different characteristics of “modern tragedy”. According to him, the cornerstones through which modern tragedy, and in particular liberal tragedy, digresses from prior traditions are as follows: “order and accident”, “the destruction of hero,” “the irreparable action,” and “the emphasis of evil”. Williams also describes the medieval tragedy in view of the “feudal rank” and “the wheel of Fortune”. This paper argues that Gollum’s tragic experience reverberates with both liberal and medieval definitions of tragedy. To this end, the elements of the two traditions are scrutinized with respect to the character’s actions and mental status