Download statistics - what do they tell us? The example of research online, the open access institutional repository at the University of Wollongong, Australia

A study was undertaken of download and usage statistics for the institutional repository at the University of Wollongong, Australia, over the six-month period January-June 2006. The degree to which research output was made available, via open access, on Internet search engines was quantified. Google was identified as the primary access and referral point, generating 95.8% of the measurable full text downloads of repository content. Further long-term studies need to be carried out to more precisely identify factors affecting download rates of repository content. This data will assist institutions and faculty in measuring research impact and performance, as an adjunct to traditional bibliometric tools such as citation indexes

Download statistics - what do they tell us? The example of research online, the open access institutional repository at the University of Wollongong, Australia

A study was undertaken of download and usage statistics for the institutional repository at the University of Wollongong, Australia, over the six-month period January-June 2006. The degree to which research output was made available, via open access, on Internet search engines was quantified. Google was identified as the primary access and referral point, generating 95.8% of the measurable full text downloads of repository content. Further long-term studies need to be carried out to more precisely identify factors affecting download rates of repository content. This data will assist institutions and faculty in measuring research impact and performance, as an adjunct to traditional bibliometric tools such as citation indexes

Yeni bir insansız hava aracının (SUAVİ) prototip üretimi ve algılayıcı-eyleyici entegrasyonu

Bu çalısmada, dört-döner rotoru ile helikopter gibi dikine kalkıs ve inis yapabilen aynı zamanda da uçak gibi uzun menzil yatay uçus yeteneğine sahip yeni bir insansız otonom hava aracının mekanik ve aerodinamik tasarımı, karbon kompozit imalatı, algılayıcı eyleyici sistem entegrasyonu ve uçus deneyleri anlatılmıstır. Gelistirilen sistem ve içinde kullanılan algılayıcı eyleyici entegrasyonunun basarımı benzetim ve deneylerle doğrulanmıstır

Quadrotor multibody modelling by vehiclesim: adaptive technique for oscillations in a PVA control system

The work presented here covers the detailed modelling and trajectory control for an elastic bladed quadrotor vehicle. The benefits of using VehicleSim modelling software are also discussed. The authors present a full elastic structural and dynamical model as well as two different aerodynamic models. These two aerodynamic models differ from each other on their level of complexity and therefore, accuracy. The control methodology employed to stabilize and guide the vehicle is PVA (ProportionalVelocity-Acceleration), derived and implemented by using Simulink. As it will be shown, it stabilises and provides satisfactory quadrotor trajectory tracking. Since the control methodology feeds back the acceleration of the vehicle, and this acceleration has an oscillating nature, an adaptive process has been designed and introduced into the vehicle’s model in order to avoid the oscillations’ transmission to the control system, showing how it reduces the amplitude of the control actions oscillations. Results of simulations and discussion on them are also provided at the end of this article

Teleoperated visual inspection and surveillance with unmanned ground and aerial vehicles,” Int

Abstract—This paper introduces our robotic system named UGAV (Unmanned Ground-Air Vehicle) consisting of two semi-autonomous robot platforms, an Unmanned Ground Vehicle (UGV) and an Unmanned Aerial Vehicles (UAV). The paper focuses on three topics of the inspection with the combined UGV and UAV: (A) teleoperated control by means of cell or smart phones with a new concept of automatic configuration of the smart phone based on a RKI-XML description of the vehicles control capabilities, (B) the camera and vision system with the focus to real time feature extraction e.g. for the tracking of the UAV and (C) the architecture and hardware of the UAV

Desarrollo de un prototipo para el geoposicionamiento referenciado por GPS de un aeromodelo tipo quadcoptero

58 páginas: ilustraciones color, figuras, tablas.Debido a la continua necesidad de enviar paquetes u objetos por medio de mensajería, se ha tenido la visión de crear un prototipo capaz de realizar esta tarea sin la necesidad de tener un piloto en frente. De lo anterior se crea la siguiente pregunta ¿es eficiente la implementación de Drones como prototipo para el envío de objetos? Para encontrar una respuesta a esta pregunta se procederá a implementar el sistema con un primer aeromodelo de este tipo. Teniendo en cuenta costos vs beneficios ofrecidos por el mismo, perturbaciones del medio. Así obteniendo la respuesta. Hoy se conoce a los aviones no tripulados, también llamados “Drones”, por su uso en operaciones militares contra el terrorismo. Pero dicha tecnología también podría ser utilizada de múltiples formas en el ámbito civil. Hay una amplia variedad de formas, tamaños, configuraciones y características en el diseño de los VANT. Históricamente los VANT eran simplemente aviones pilotados remotamente (en inglés: Drones), pero cada vez más se está empleando el control autónomo de los VANT. En este sentido se han creado dos variantes: algunos son controlados desde una ubicación remota, y otros vuelan de forma autónoma sobre la base de planes de vuelo pre programado usando sistemas más complejos de automatización dinámica. Los VANT son también sistemas autónomos que pueden operar sin intervención humana alguna durante su funcionamiento en la misión a la que se haya encomendado, es decir, pueden despegar, volar y aterrizar automáticamente.Bibliografía y webgrafía: página 58[6]PregradoIngeniero Electrónic

Estudi i disseny d'un sistema de fusió de dades d'actitud i posició a bord per al seguiment de trajectòries d'un UAV

En aquest projecte es proposa dissenyar i programar un sistema a bord que fusioni les dades de posició proporcionades per un GPS diferencial, amb RTK, i les dades d'actitud d'una unitat de mesura inercial. El resultat és la posició, velocitats i acceleracions (tant lineals com angulars) del vehicle on es troben aquests sensors. La fusió de les dades es realitza mitjançant un filtre de Kalman i la seva implementació ha de ser eficient.Amb la informació proporcinoada pel sistema de fusió es dissenyarà i implementarà el control de trajectòria de la nau aprofitant els controls d'actitud i velocitat ja incorporats.Disseny i programació del sistema de fusió de dades.Estudi de l'estat de l'art de seguiment de trajectòria.Disseny del control de trajectòria.Proves de vol i avaluació del sistema de control

Foundations of coverage algorithms in autonomic mobile sensor networks

Drones are poised to become a prominent focus of advances in the near future as hardware platforms manufactured via mass production become accessible to consumers in higher quantities at lower costs than ever before. As more ways to utilize such devices become more popular, algorithms for directing the activities of mobile sensors must expand in order to automate their work. This work explores algorithms used to direct the behavior of networks of autonomous mobile sensors, and in particular how such networks can operate to achieve coverage of a field using mobility. We focus special attention to the way limited mobility affects the performance (and other factors) of algorithms traditionally applied to area coverage and event detection problems. Strategies for maximizing event detection and minimizing detection delay as mobile sensors with limited mobility are explored in the first part of this work. Next we examine exploratory coverage, a new way of analyzing sensor coverage, concerned more with covering each part of the coverage field once, while minimizing mobility required to achieve this level of 1-coverage. This analysis is contained in the second part of this work. Extending the analysis of mobility, we next strive to explore the novel topic of disabled mobility in mobile sensors, and how algorithms might react to increase effectiveness given that some sensors have lost mobility while retaining other senses. This work analyzes algorithm effectiveness in light of disabled mobility, demonstrates how this particular failure mode impacts common coverage algorithms, and presents ways to adjust algorithms to mitigate performance losses. --Abstract, page iv