Towards the development of a smart flying sensor: illustration in the field of precision agriculture

Sensing is an important element to quantify productivity, product quality and to make decisions. Applications, such as mapping, surveillance, exploration and precision agriculture, require a reliable platform for remote sensing. This paper presents the first steps towards the development of a smart flying sensor based on an unmanned aerial vehicle (UAV). The concept of smart remote sensing is illustrated and its performance tested for the task of mapping the volume of grain inside a trailer during forage harvesting. Novelty lies in: (1) the development of a position-estimation method with time delay compensation based on inertial measurement unit (IMU) sensors and image processing; (2) a method to build a 3D map using information obtained from a regular camera; and (3) the design and implementation of a path-following control algorithm using model predictive control (MPC). Experimental results on a lab-scale system validate the effectiveness of the proposed methodology

Modeling of a Variable-BVR Rotary Valve Free Piston Expander/Compressor

The concept of a free-piston expansion/compression unit with a variable Built-in Volume Ratio (BVR) is proposed. This device has no crankshaft mechanism which provides a possibility to optimize the expansion process free of mechanical limitations. An additional degree of freedom is used, namely the rotation to control the in- and the outlet ports timing. Further, the operation in the expander mode will be described. In most of the existing linear expanders/compressors, bouncing chambers or devices are used to reverse the piston movement at extreme positions. This approach is characterized by relatively high energy losses due to irreversibility of such a process. As an alternative, a fully controlled movement of the piston is proposed. This paper is focused on the control algorithm based on rules, which have been obtained and based on the insight in the system. Including the rotation timing, resulting in an optimal expansion process with an outlet pressure matching with the required one

The implementation of co-teaching and co-planning in the pre-selected environments of Sena’s technical and technological programs in Risaralda

El propósito de este proyecto es encontrar y crear una forma de implementar la adquisición del idiomainglés en el Servicio Nacional de Aprendizaje (SENA). El SENA vela por invertir en el desarrollo social y técnico de los trabajadores colombianos, ofreciendo y ejecutando una formación profesional integral, para la incorporación y desarrollo de las personas en actividades productivas que contribuyan al desarrollo social, económico y tecnológico de este país. Así, este proyecto de aula a través de actividades de co-planificación y co-enseñanza buscará la implementación de los niveles de competencia requeridos para cada programa específico que ofrece la institución. La finalidad de estasactividades y espacios radica en la poca efectividad que han tenido en las poblaciones objetivo las diferentes entidades encargadas de la enseñanza del idioma inglés. Esperamos despertar el interés delos estudiantes por el aprendizaje del inglés como segundo idioma, y también que entiendan este proyecto como un espacio de formación de docentes para dar sus primeros pasos en el mundo profesional. Así mismo, los encuentros entre ambas instituciones nos permitirán aplicar los conocimientos aprendidos durante el programa, pudiendo así generar un impacto positivo en el futuro de sus estudiantes.The purpose of this project is to find and create a way to implement the acquisition of the English language in the National Learning Service (SENA). SENA oversees investing in the social and technicaldevelopment of Colombian workers, offering and executing comprehensive professional training, for the incorporation and development of people in productive activities that contribute to the social, economic, and technological development of this country. Thus, this classroom project through co-planning and co- teaching activities will look for the implementation of the proficiency levels required for each specific program offered by the institution. The purpose of these activities and spaces lies in the lack of effectiveness that the different entities in charge of teaching the English language have had in the target populations. We hope to awaken an interest in the students for learning English as a second language, and also to understand this project as a space for developing teachers to have their first steps in the professionalworld. Likewise, the meetings between both institutions will allow us the application knowledge learned during the program, thus being able to generate a positive impact on the future of its students.PregradoLicenciado(a) en Bilingüismo con Énfasis en InglésContent Acknowledgments 4 Justification 5 Objectives 8 Teaching objectives 8 Learning objectives 8 Conceptual Framework 9 Literature Review 16 Setting and Context 19 Participants 22 Needs of the institution 22 Instructional design 23 Expected results 24 Instruments 25 Lesson plan 25 Attachments/materials 31 Limitations 31 Implications 33 Professional Development Reflection 35 Professional Development Reflection part 1 35 Professional Development Reflection part 2 38 Conclusion 39 References 4

Using Natural Raw Materials and CEM Approach for the Design of Andean Volcanic Self-Compacting Concretes

La actividad volcánica es característica de las zonas sísmicas. En consecuencia, el material volcánico forma parte del paisaje en lugares donde los terremotos son fenómenos naturales comunes. Dado que los residuos volcánicos (VW) muestran actividad puzolánica, la sustitución del cemento Portland (PC) manufacturado por VW es claramente una opción deseable no solo desde el punto de vista económico sino también para reducir las emisiones de CO 2huella dactilar. Por lo tanto, diseñar hormigones con cementos Portland volcánicos (VPC) contribuye claramente a una producción de cemento más limpia. Las actividades de construcción y edificación en zonas sísmicas necesitan utilizar un tipo específico de hormigón: hormigón autocompactante (SCC). El desafío en el que nos enfocamos fue el diseño de SCC usando VPC. El comportamiento de flujo de SCC se caracteriza por un límite elástico bajo, una viscosidad plástica alta y un comportamiento de espesamiento por cizallamiento a cizallamiento alto. Sin embargo, obtener estas sorprendentes propiedades del hormigón no es fácil con los ensayos de flujo de hormigón tradicionales (cono de Abrams, etc.). Además, estos métodos son muy costosos en términos de tiempo y material. Una alternativa que nos permite utilizar la reometría absoluta y que ha sido poco explorada consiste en la sustitución del hormigón por un mortero equivalente. En este estudio se utilizó el denominado mortero equivalente de hormigón (CEM) para obtener formulaciones de HAC con VPC. Las pruebas de minicono confirmaron la ausencia de mezcla en algunas formulaciones de CEM seleccionadas según el cumplimiento de los criterios para SCC. De las respectivas formulaciones del CEM se infirieron tres propuestas concretas. Se adaptaron al estándar europeo SCC según el ensayo de apertura de conos de Abrams.Partial funding for open access charge: Universidad de Málag

Bus line classification using neural networks

Grouping urban bus routes is necessary when there are evidences of significant differences among them. In Jiménez et al. (2013), a reduced sample of routes was grouped into clusters utilizing kinematic measured data. As a further step, in this paper, the remaining urban bus routes of a city, for which no kinematic measurements are available, are classified. For such purpose we use macroscopic geographical and functional variables to describe each route, while the clustering process is performed by means of a neural network. Limitations caused by reduced training samples are solved using the bootstrap method

Identification and path following control of an AR.drone quadrotor

This paper describes the process of identification and closed-loop control of an Parrot AR. Drone Unmanned Aerial Vehicle (UAV) as well as a path following application based on IMC position controllers. The research issue is to achieve position control of the AR.Drone quadrotor movement via its on-board sensory equipment and external webcam video stream. Firstly, transfer functions are detailed for pitch and altitude movements and a comparison is made between implemented PID and IMC controller performance for both simulation and practice. Furthermore, using IMC controllers, a path following application exhibits controller behavior from a practical point of view. It is concluded that the dynamic model and the controllers implemented on the quadrotor can serve as a reliable basis for more advanced applications

Multivariable EPSAC predictive control for organic rankine cycle technology

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