Search results for "LoRa"
showing 10 items of 2828 documents
Design and control of a novel 3D casting manipulator
2010
This paper focuses on casting manipulation and presents an innovative mechanism that allows objects placed in a three-dimensional space to be reached with a relatively small robot. Casting manipulation is a technique by which a robotic end-effector is thrown and its ballistic flight is controlled through a tether cable so as to reach a target object. Previous work presented a solution that is viable only when the position of the target object is perfectly known or aligned with the throwing plane. Our work extends the technique by use of a novel mechanical design of the arm, and a suitable control scheme for the flight of the end-effector, which makes it applicable for objects placed at gene…
A Rough-Terrain Casting Robot for the ESA Lunar Robotics Challenge
2009
This paper describes the design and implementation of DAVID, a lunar vehicle developed for the European Space Agency (ESA) Lunar Robotics Challenge, presenting severe terrain negotiation and sample acquisition challenges. We discuss in some detail two of the main innovative aspects of our entry to the challenge, i.e. the locomotion system and the sample acquisition system. Motivated by the challenge specifications, a range of different locomotion systems were considered, among which we chose a simple, rugged and effective wheeled system. We provide an account of the choice of five different types of wheels, which were designed, analyzed and experimentally tested in conditions similar to the…
Service-Dominant Logic and Value in Tourism Management: A Qualitative Study within Spanish Hotels Managers
2013
<p><em>With the award-winning article of Vargo and Lusch (2004), a new concept was introduced, called Service-Dominant logic (S-D logic). This paper aims to apply S-D logic to the tourism sector by determining </em><em>if this new approach, by means of the importance of value co-creation, can affect the perceptions of value in the mind of the consumer and, thus, be used as a source of competitive advantage if adopted by tourism service providers. In this paper a conceptual framework is established through a literature review on both S-D logic and value in tourism. After a review of both topics, links between them are conceptually explored. With empirical research met…
Innovation in collaborative design: an exploratory study in hackathon
2021
International audience; Collaborative design is the use of design practices which tend to favor the integration of different experts, and to support creativity and innovation. Therefore, in this study, we were particularly interested in the collaborative design tools used in the specific context of a pedagogical hackathon. During this event, 1310 engineering students mentored by professors and industrial experts worked on around 131 industrial projects. In this article, we will present our study of the tools put in place by the participants of these innovative projects according to their training. Our study is based on a collection of project data. We will show that storyboards are often us…
La alimentación en los viajes espaciales tripulados: desde el Programa Gemini hasta la ISS/Shuttle
2014
Los alimentos espaciales han tenido una gran importancia en el desarrollo de las misiones espaciales tripuladas ya que constituyen la única fuente de energía y nutrientes para el ser humano fuera del planeta Tierra. Dichos alimentos han experimentado una gran evolución desde el inicio del Programa Mercury hasta las actuales misiones a la International Space Station (ISS). En un primer momento eran diseñados para ofrecer una gran densidad energética y nutritiva y actualmente se da prioridad a las características organolépticas y psicológicas, ya que contribuyen a un mayor consumo y un mejor estado nutricional de los astronautas. El objetivo del presente estudio es hacer un análisis retrospec…
Antibacterial studies, DNA oxidative cleavage, and crystal structures of Cu(II) and Co(II) complexes with two quinolone family members, ciprofloxacin…
2005
Nine coordination compounds of Cu(II) and Co(II) with Ciprofloxacin (HCp) and Enoxacin (HEx) as ligands have been prepared and characterized. Single crystal structural determinations of [Cu(HCp)2(ClO4)2].6H2O (1) and [Co(HEx)2(Ex)]Cl.2CH(3)OH.12H2O (4) are reported. The crystal of 1 is composed of [Cu(HCp)2(ClO4)2] units with the two perchlorate anions semicoordinated, and uncoordinated water molecules. The copper ion, at a crystallographic inversion centre, is in a tetragonally distorted octahedral environment. The structure of 4 consists of cationic monomeric [Co(HEx)2(Ex)]+ units, chloride anions, and uncoordinated methanol and water molecules. The complex is six-coordinate, with a sligh…
Entertainment virtual reality system for simulation of spaceflights over the surface of the planet Mars
2006
In recent years Virtual Reality technologies have enabled astronomers to recreate and explore three dimensional structures of the Universe for scientific purposes. Mars, due to its scientific interest,has been the focal point of numerous research projects using these technologies, however, none of these virtual reality tools have been developed specifically for entertainment purposes.The focus of this paper is to present MarsVR, as an entertainment research project that educates people on the topography and orography of the planet Mars from the perspective of popular science. Some projects have been designed MarsVR for entertainment purposes and include the latest advances in 3D real time a…
Entrepreneurial Metaphors and Concepts: An Exploratory Study
1999
IN THE PAST RESEARCH THERE HAS BEEN continued controversy over the definition of entrepreneurship and the identification of entrepreneur. By combining the ideas of entrepreneurship and linguistics, this paper takes a new approach to examining the definitions. An exploratory analysis of entrepreneurial metaphors and concepts is conducted to achieve this goal. In a quantitative analysis of entrepreneurial concepts respondents defined the terms 'entrepreneur' and 'entrepreneurship' with suggested conceptual equivalents. In an analysis of metaphor, informants formed metaphoricalexpressions of entrepreneurship. The sample consisted of 751 respondents from Finland, Sweden, Norway, Ireland, Canad…
Women entrepreneurship in small service firms: motivations, barriers and performance
2012
This article presents an exploratory study on the characteristics of women entrepreneurs and the businesses they run in the Valencia region. Following a close look at the evolution of literature on women entrepreneurs, the study shows how different internal and external factors affect the motivation, obstacles and performance of firms created by women. These results contribute towards a better understanding of business creation by women as they provide an empirical contrast of these variables (motivation, barriers and performance). Purpose: The purpose of this paper is to examine the characteristics of women entrepreneurs and the businesses they run in the Valencia Region of Spain, in order…
Sub specie æternitatis: the role of the ruin and the ancient in the process of architectural renewal between metamorphosis and resurgence
2022
Composing new works of architecture inspired by vestiges from antiquity or archaeology. The reflections and the case study which will be proposed, pertaining to a recent design experiment for the archaeological area and Antiquarium of Tyndaris, are dedicated to this theme. Over and above any charm exerted by such places, by landscapes in which the ruins appear identical in substance and which sometimes manifest themselves as “sub specie æternitatis”, there are reasons linked to the very profession of architect and to the gashes in the crucible of controversies around the role of history in its contentious relationship with architectural design. That apart, the aporias revealed by Michel Fou…