...yqchen@ece.usu.edu Abstract— This paper presents a survey of the autopilot systems for small fixed-wing unmanned air vehicles (UAVs). The UAV flight control basics are introduced first. The radio control system and autopilot control system are then explained from both hardware and software viewpoints. Several typical commercial off-the-shelf autopilot packages are compared in detail. In addition, some research autopilot systems are introduced. Finally, conclusions are made with a summary of the current autopilot market and a remark on the future development.This paper presents a survey of the autopilot systems for small fixed-wing unmanned air vehicles (UAVs). The UAV flight control basics are introduced first. The radio control system and autopilot control system are then explained from both hardware and software viewpoints. Several typical commercial offthe-shelf autopilot packages are compared in detail. In addition, some research autopilot systems are introduced. Finally, conclusions are made with a summary of the current autopilot market and a remark on the future development. Index Terms— Autopilot systems, autonomous navigation, unmanned air vehicle (UAV), remotely piloted vehicle (RPV), unmanned aircraft system (UAS), flight control. commercial and research autopilot systems so that the researchers can either purchase or build the UAVs and autopilots based on their specific application requirements. The paper is organized as follows....
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...that are well-suited to meet these rising challenges. We first present a taxonomy that captures some of the key distinctions across different kinds of business settings and customer relationships, and identify some of the unique modeling and measurement issues that arise across them. We then provide deeper coverage of these modeling issues, first for noncontractual settings (i.e., situations in which customer “death” is unobservable), then contractual ones (i.e., situations in which customer “death” can be observed). We review recent literature in these areas, highlighting substantive insights that arise from the research as well as the methods used to capture them. We focus on practical applications that use appropriately chosen data summaries (such as recency and frequency) and rely on commonly available software packages (such as Microsoft Excel). n 2009 Direct Marketing Educational Foundation, Inc. Published by Elsevier B.V. All rights reserved. Keywords: Customer-base analysis; Customer lifetime...
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...2013 IEEE International Multi-Disciplinary Conference on Cognitive Methods in Situation Awareness and Decision Support (CogSIMA), San Diego User assistance by situational, task- and model-based process information filtering in interactive, semi-automated human-automation systems Marcel Langer and Dirk S¨ ffker o Chair of Dynamics and Control University of Duisburg-Essen Duisburg, Germany Email: {marcel.langer; soeffker}@uni-due.de Abstract operators representing (human or technical) actions. Tasks are described by defining final situations that need to be reached and process information are fused to a situation vector representing the actual state of the entire system. Suitable information is identified by comparison of differences in future situations and used for the detection of valuable information with respect to the defined (sub)task. The hierarchical task analysis [4] of a semi-automated molding process using No-Bake-Technique is additional discussed as an illustrative application example that is completely mapped into the SOM-framework. Furthermore, the results of a user study of selected functionality of the developed process guiding and supervision assistance system are presented. Nowadays, the integration of users into technical systems becomes necessary due to reasons of automation concepts that are not capable of completely integrating process knowledge and manufacturing skills for full automation of technical processes. In such interactive, semi-automated systems human...
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...Impianti chimici II Monographic Thesis ADSORPTION HEAT PUMPS USING THE ZEOLITE-WATER PAIR: Operating principle and applications Author: Federica FURNARI 1 SUMMARY Introduction ___________________________________________________________________ 3 Chapter 1 Why choosing water-zeolite? ____________________________________________________ 5 Chapter 2 Operating principle of water-zeolite heat pump ____________________________________ 8 Chapter 3 Technological applications _____________________________________________________ 11 Solar-powered adsorption icemakers _____________________________________________________ 12 Self chilling beer kegs _________________________________________________________________ 15 Solar-powered adsorption air conditioners ________________________________________________ 16 Chapter 4 Key issues for future development _______________________________________________ 18 The heat/mass transfer issue ___________________________________________________________ 19 Heat recovery _______________________________________________________________________ 21 Bibliography _________________________________________________________________ 24 2 Introduction Although adsorptive processes have been extensively studied for gas separation, catalysis, etc., it is only recently that they have been proposed for heat management. The interest in adsorption systems started to increase, firstly due to the oil crisis in the 1970s that lead to...
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...138 IEEE TRANSACTIONS ON INDUSTRIAL INFORMATICS, VOL. 8, NO. 1, FEBRUARY 2012 A Fusion Approach for Efficient Human Skin Detection Wei Ren Tan, Chee Seng Chan, Member, IEEE, Pratheepan Yogarajah, and Joan Condell Abstract—A reliable human skin detection method that is adaptable to different human skin colors and illumination conditions is essential for better human skin segmentation. Even though different human skin-color detection solutions have been successfully applied, they are prone to false skin detection and are not able to cope with the variety of human skin colors across different ethnic. Moreover, existing methods require high computational cost. In this paper, we propose a novel human skin detection approach that combines a smoothed 2-D histogram and Gaussian model, for automatic human skin detection in color image(s). In our approach, an eye detector is used to refine the skin model for a specific person. The proposed approach reduces computational costs as no training is required, and it improves the accuracy of skin detection despite wide variation in ethnicity and illumination. To the best of our knowledge, this is the first method to employ fusion strategy for this purpose. Qualitative and quantitative results on three standard public datasets and a comparison with state-of-the-art methods have shown the effectiveness and robustness of the proposed approach. Index Terms—Color space, dynamic threshold, fusion strategy, skin detection. ...
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...2013 Lecturers Responsible: Allison Abbott and Kirstine Collins Module Number: BS2104 Word Count: 2179 Executive summary The subject of this report is the ‘war for talent’ phenomenon and its implication on talent management practices. Its first section presents the aim and objectives and the utilised methods of research. In the second chapter called ‘What is talent’, various definitions from different angles are provided for a better understanding of the main topic of the report. The third chapter analyses the ‘war for talent’ concept with both pro and con academic arguments. The fourth section defines talent management as a mandatory ‘toolkit’ to fight the war for talent. In the first subsection a few definitions and talent management approaches are explained. This section is followed by two consecutive ones which define and analyse the notions of performance, and potential in relation with talent management. The fifth and final chapter expands the ‘war for talent’ concept on a global scale with the two subsections discussing the influence of globalisation on the talent war followed by a case study of Poland’s talent management issues in the global ‘war for talent’. In the end a conclusion is drawn followed by afferent references consulted in order to create the report. Table of contents Front cover 1 Executive summary 2 Table of contents 3 List of figures 4 1.0 Introduction ...
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...Executive Summary This report focuses on the use effective pricing strategies to maximize profits from F1 ticket sales. We believe this to be an important objective for the F1 management given high costs of hosting the F1 race each year. Effective pricing strategies can help to recoup the cost of the race and possibly even generate revenue for the organizers. The first part of this report focuses on the effectiveness of existing price strategies such as perception based pricing, price discrimination, bundling and discount management. Our analysis suggests that the F1 tickets in Singapore are wrongly priced as it fails to capture perceived benefits such as having a city track and being the first ever night race. It is, however, too late to reset the price as the reference point has been established. Next, we argue that while the use of price discrimination has increased the total revenue from ticket sales, the extensive use of early-bird based pricing has reduced the effectiveness of discount pricing. While some bundling strategies currently in place, we believe that more can be done to increase the perceived value and to capture greater market share. We have provided suggests for this in section 7. We further evaluated the use of discount management for quantity purchases and conclude that the use of high discount (≈15%) for greater quantity sale will only be financially justified through high volume sales. Finally, we propose several solutions to increase F1 revenue yield...
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...290 IEEE TRANSACTIONS AUTOMATIC CONTROL, VOL. ON AC-29,NO. 4, APRIL 1984 The Control of a Prosthetic Arm by EMG Pattern Recognition Abstract -An electromyographic (EMG) signal pattern recognition system is constructed for real-lime control a prostheticarm through precise of identificationof motion and speed command. A probabiistic modelofthe EMG patterns is f i i formulatedinthe featurespace of integralabsolute d u e (IAV) to describetherelation betweena command, represented by motion and speed variables, and location and shape of the corresponding pattern. The model provides the sample probability density function of pattern classes in the decision space relations between L4V, of variance zero and crossings based on the variance, and zero crossings established in this paper. Pattern classification is carried out through a multiclass sequential decision procedure designed with an emphasis on computational simplicity. The upper bound of probability of error and the average number of sample observationsareinvestigated. Speed andmotionpredictionsareusedin conjunctionwiththe decision proceduretoenhance decision speed and reliability. A decomposition ruleis famulated for the direct assignment of speed to each primitive motion involved ina combined motion..4 learning procedure i also designedforthedecisionprocessorto s adaptlong-termpattern variation. Experimental results are discussed in the Appendix. I. INTRODUCTION HE electromyographc (EMG) signals are the electric...
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...a significant impact on the safety, efficiency, capability, capacity, environmental impact and financial performance of the Air Transportation System and its components. T Introduction he US and International Air Transportation Systems have demonstrated remarkable growth and increased performance over the past few decades. Fig.1 demonstrates the growth in passenger and cargo traffic in international regions since 1972. Strong growth can be seen in North America and Europe which continue to dominate the passenger traffic. In addition, extraordinary growth can be seen in Asia/Pacific which has dominated the cargo traffic since the early 1990’s. Scheduled Revenue Passenger-Kilometers by Region 1400 1200 1000 RPK (billion) North America Europe Freight Tonne-Kilometers by Region 45 40 35 North America 30 FTK (billion) Europe Asia and Pacific Latin America & Caribbean Middle East Africa 800 600 400 200 0 1970 1975 1980 1985 1990 1995 2000 2005 Asia and Pacific Latin America & Caribbean Middle East Africa 25 20 15 10 5 0 1970 1975 1980 1985 1990 1995 2000 2005 Figure 1. Scheduled Passenger and Cargo Traffic by Region.1 This growth in traffic has been accompanied by an increase in safety and cost efficiency. The world commercial jet aircraft fatal or hull loss accident rate decreased by a factor of 5 from 1972 to 2002 and by more than 25 from the entry of...
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...choices through a quantitative approach to modelling of performance measurement systems. The paper provides a brief background to the research problem and preceding works. The tools and techniques used are brie#y introduced. Use of these tools and techniques to evaluate the performance of alternative manufacturing strategies is demonstrated. Finally, the capability of the approach to deal with dynamic environments is demonstrated 2001 Elsevier Science B.V. All rights reserved. using sensitivity analysis. Keywords: AHP; Performance measurement; Prioritisation of performance measures; Dynamics of performance measures; Resource allocation 1. Introduction The nature of competition has changed dramatically over the last two decades. Quality, speed, and #exibility, in addition to cost, have emerged as the three most important competitive attributes [1}4]. This has made the traditional "nancially based performance measurement systems less relevant. Over recent years much work has been done by practitioners and researchers to develop new performance measurement systems which try to take account of "nancial and non-"nancial measures in balance [5}8]. Extensive, continuing research is * Corresponding author. Tel.: #44-141-548-2015; fax: #44141-552-0557. E-mail address: csm@dmem.strath.ac.uk...
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...one-dimensional structures and have limited expressiveness • To overcome these limitations, we’ll consider a new data structure, the tree • Trees consist of two components, nodes and arcs (or edges) • Trees are drawn with the root at the top, and “grow” down – The leaves of the tree (also called terminal nodes) are at the bottom of the tree Data Structures and Algorithms in C++, Fourth Edition 4 Trees, Binary Trees, and Binary Search Trees (continued) • Trees can be defined recursively as follows: 1. 2. 3. A tree with no nodes or arcs (an empty structure) is an empty tree If we have a set t1… tk of disjoint trees, the tree whose root has the roots of t1… tk as its children is a tree Only structures generated by rules 1 and 2 are trees • Every node in the tree must be accessible from the root through a unique sequence of arcs, called a path • The number of arcs in the path is the path’s length • A node’s level is the length of the path to that node, plus 1 Data Structures and Algorithms in C++, Fourth Edition 5 Trees, Binary Trees, and Binary Search Trees...
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...A Delay-based Optimum Routing Protocol Scheme for Collision Avoidance Applications in VANETs Gayathri Narayanan1,a, Neethu Sathianadhan2,b and Sruthi Sanjiv Gangadharan3,c 1,2,3 Department of Electronics and Communication Engineering Amrita School of Engineering, Amritapuri Campus Kollam – Kerala, India agayathrin@am.amrita.edu, bneethu91ammu@gmail.com, csruti.sanjiv_g@ymail.com Keywords: Broadcast, Multi-hop, VANETs, Delay, Routing Protocols, AODV, Cluster-based routing, OSPF. Abstract — Broadcast transmissions are currently finding extensive applications in vehicular ad-hoc networks, albeit primarily in the research phase. Given the importance of knowing the updated network details of each node in the network, and also considering the fact that the delay in transmission of messages is a crucial factor in collision avoidance, it is imperative to implement a broadcast network which will ensure minimum delay in transmission of messages between the nodes. In this paper, we primarily implement a multi-hop broadcast vehicular network for collision avoidance. We consider the mobility and traffic density of vehicles and simulate the end-to-end delay in message transmission for a sparse and dense network scenario. In order to ensure high reliability and get the optimum delay, we extend the scenario to include three different routing protocols – AODV, Cluster-based routing and OSPF – and perform a comparison based on the end-to-end transmission delay to determine the...
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...Digital Image Processing Second Edition Rafael C. Gonzalez University of Tennessee Richard E. Woods MedData Interactive Prentice Hall Upper Saddle River, New Jersey 07458 Library of Congress Cataloging-in-Pubblication Data Gonzalez, Rafael C. Digital Image Processing / Richard E. Woods p. cm. Includes bibliographical references ISBN 0-201-18075-8 1. Digital Imaging. 2. Digital Techniques. I. Title. TA1632.G66 621.3—dc21 2001 2001035846 CIP Vice-President and Editorial Director, ECS: Marcia J. Horton Publisher: Tom Robbins Associate Editor: Alice Dworkin Editorial Assistant: Jody McDonnell Vice President and Director of Production and Manufacturing, ESM: David W. Riccardi Executive Managing Editor: Vince O’Brien Managing Editor: David A. George Production Editor: Rose Kernan Composition: Prepare, Inc. Director of Creative Services: Paul Belfanti Creative Director: Carole Anson Art Director and Cover Designer: Heather Scott Art Editor: Greg Dulles Manufacturing Manager: Trudy Pisciotti Manufacturing Buyer: Lisa McDowell Senior Marketing Manager: Jennie Burger © 2002 by Prentice-Hall, Inc. Upper Saddle River, New Jersey 07458 All rights reserved. No part of this book may be reproduced, in any form or by any means, without permission in writing from the publisher. The author and publisher of this book have used their best efforts in preparing this book. These efforts include the development, research, and testing of the theories and programs to determine their effectiveness...
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...Publisher: Prentice Hall Pub Date: October 04, 2002 Print ISBN-10: 0-13-047065-1 Print ISBN-13: 978-0-13-047065-2 Pages: 432 Table of Contents | Examples Copyright National Improvements | Virtual Instrumentation Series Preface References Hardware and Software Requirements LabVIEW VI Libraries and Project and Problem Folders and Files Unit 1. Elementary Circuit Analysis for Analog Electronics Section 1.1. Resistor Voltage Divider and MOSFET DC Gate Voltage Section 1.2. Output Circuit and DC Drain Voltage Section 1.3. Frequency Response of the Amplifier Stage Section 1.4. Summary of Equations Section 1.5. Exercises and Projects Unit 2. Transistors and Voltage Amplification Section 2.1. BJT and MOSFET Schematic Symbols, Terminal Voltages, and Branch Currents Section 2.2. Fundamentals of Signal Amplification: The Linear Circuit Section 2.3. Basic NMOS Common-Source Amplifier Section 2.4. Transistor Output Resistance and Limiting Gain Section 2.5. Summary of Equations Section 2.6. Exercises and Projects Section 2.7. References to the Electronics Book Sequence Unit 3. Characterization of MOS Transistors for Circuit Simulation Section 3.1. Physical Description of the MOSFET Section 3.2. Output and Transfer Characteristics of the MOSFET Section 3.3. Body Effect and Threshold Voltage Section 3.4. Derivation of the Linear-Region Current – Voltage Relation Section 3.5. Summary of Equations Section 3.6. Exercises and Projects Unit 4. Signal Conductance Parameters...
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...DEPARTMENT OF ARCHAEOLOGY AND HERITAGE STUDIESUNIVERSITY OF GHANA, LEGON ON 27TH APRIL,2012 | | | TOPIC: GROUP STUDIES AMONG STUDENTS OF UNIVERSITY OF GHANA Table of contents Introduction……………………………………………………………………………………………………………………………. Methodology………………………………………………………………………………………………………………………….. Literature Review…………………………………………………………………………………………………………………………………….. What is a group study? How do we form successful study groups? Benefits of study groups Presentation…………………………………………………………………………………………………………………………………………. Analysis ………………………………………………………………………………………………………………………………………………….. Interpretations………………………………………………………………………………………………………………………………………… Summary……………………………………………………………………………………………………………………………………………… Conclusion………………………………………………………………………………………………………………………………………………. Appendix…………………………………………………………………………………………………………………………………………… References…........................................................................................................................................... INTRODUCTION As others have done researches on various aspects of students’ behavior, it seems good to me also as a ‘’senior undergraduate and proud ethnoarchaeology student to also conduct this research on ‘group studies among students of the university of Ghana’’. First of all, what is a study group?. A study group may be described as two or more people coming together to exchange ideas or to study a particular...
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