Nuestros investigadores

María Isabel Rodríguez Ferradas

Publicaciones científicas más recientes (desde 2010)

Autores: Francés, Leire, (Autor de correspondencia); Morer, María de la Paz; Rodríguez, María Isabel; et al.
Revista: SENSORS
ISSN 1424-8220  Vol. 19  Nº 2  2019 
Wearables are gaining widespread use and technologies are making it possible to monitor human physical activity and behaviour as part of connected infrastructures. Many companies see wearables as an opportunity to enhance worker safety since they can monitor their workers' activity in real life scenarios. One of the goals of this technology is to integrate existing electronic components, such as sensors or conductors, in order to create fully wearable systems. This integration is constrained not only by technical factors but also by user requirements and internal company standards. This paper considers such constraints and presents preliminary research for the design of a wearable glove as a new tool to track forces exerted by workers in car assembly lines. The objective of the glove is to measure forces and compare these to maximum forces already identified by the company. Thus, the main objectives are to: (1) integrate the components based on the requirements of the users and the context of application, and (2) provide a new tool that can be used in situ to track workers. This study was carried out in close collaboration with Volkswagen through a human-centred iterative design process. Thus, this paper presents the development of a wearable device glove based on a specific design methodology where both the human and technological aspects are considered.
Autores: Cazón, Aitor; coautor; Matey, Luis Mariano; et al.
Revista: PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART P-JOURNAL OF SPORTS ENGINEERING AND TECHNOLOGY
ISSN 1754-3371  Vol. 233  Nº 1  2019  págs. 160 - 169
Shin pads are part of the mandatory equipment footballers must wear so as to prevent lesions. Most players wear commercially available shin pads made from a variety of common materials (polypropylene or polyethylene) and high-resistance materials (glass fibre, carbon fibre or Kevlar) using traditional manufacturing techniques. Additive manufacturing was used years ago to deliver customised rigid shin pads, but they did not offer any significant advantage in terms of materials or design compared to traditional shin pads. This project analyses a novel approach to the design and manufacture of shin pads for football players that combines existing digitisation tools, lattice structures and a multi-material additive manufacturing device. A total of 24 different additive manufacturing geometries were evaluated using a customised rig where a 1-kg impactor was released from several heights (100-400 mm). The impact acceleration, the transmitted force to the leg and penetration were calculated. Results were compared against two commercially available shin pads. Results show that two of the additive manufacturing specimens tested at the highest drop height had lower impact accelerations than commercial shin pads. They had an acceleration reduction between 42% and 68% with respect to the commercial shin pads. Regarding the penetration, the improvement achieved with additive manufacturing specimens ranged from 13% to 32%, while the attenuation and the contact times were similar.
Autores: Calvo, J. O.; Cazón, Aitor, (Autor de correspondencia); Rodríguez, María Isabel; et al.
Revista: DYNA
ISSN 0012-7361  Vol. 94  Nº 2  2019  págs. 221 - 225
Additive Manufacturing devices or 3D printers allow the possibility of creating almost anything. One of the most promising fields of application are wearable devices, which can be directly printed on textiles. This paper aims to study adhesion forces and warping effects when depositing a polymer onto a textile with a low-cost extrusion 3D printer. To achieve this, two different polymers (PLA and Filaflex) and six of the most common textile materials were selected. L-shaped specimens were printed by combining the two polymers and the six textiles. Most of the common printing settings were fixed for both materials, while the layer quality was 0.1 mm and 0.2 mm. Once printed, they were inspected with a Coordinate Measuring Machine and the deformation of each specimen was quantified by calculating their maximum and minimum displacements. Afterwards, each specimen was axially tested to evaluate the adhesion forces between the polymer and the textile. In terms of warping, flexible filament showed the lowest values independent of printing quality (0.56 mm and 0.3 mm) relative to the rigid filament (0.73 mm and 0.8 mm). In terms of adhesion, the combination of a porous textile and a flexible filament got the highest values, regardless of the layer height selected. The conclusion of this study is that polymer textile deposition can be a real manufacturing strategy that should be considered when thinking about the design of a wearable device to be worn on the body.
Autores: Francés, Leire, (Autor de correspondencia); Morer, María de la Paz; Rodríguez, María Isabel; et al.
Revista: DYNA
ISSN 0012-7361  Vol. 93  2018  págs. 421 - 427
Many industrial companies are now getting on board the new industrial revolution dominated by data acquisition, digitalization and other new technologies. Wearables combine the features of some of the most popular technologies of this revolution: they can monitor specific body regions by tracking information anywhere and anytime. Wearable systems for hands represent a special field of interest since they are the main body region involved in industrial tasks. This paper surveys such wearable systems based on the data from the last years. It collects information about the most important components they incorporate and analyses their features considering that they are devices aimed to be worn on the body. Thus, this paper is addressed to researchers who want to understand what a wearable is and which the main components and characteristics should incorporate, and also, those who want to explore new trends in this research field.
Autores: Rodríguez, María Isabel; Alfaro, José Antonio; Sandulli, F.;
Revista: BUSINESS PROCESS MANAGEMENT JOURNAL
ISSN 1463-7154  Vol. 23  Nº 6  2017  págs. 1196 - 1215
Purpose - The purpose of this paper is to explore the relevant factors that influence the implementation of innovation contests, an open innovation (OI) practice that has been extensively reported in the literature as a managerial tool for external knowledge search. The authors focus the study on the context of small and medium enterprises (SMEs). Design/methodology/approach - The approach is a retrospective case study. This methodology allows an in-depth view into a Spanish SME that successfully undertook two new product development processes thanks to the deployment of innovation contests. Findings - The main context factors influencing innovation contests as managerial tool are ambidexterity, technological and marketing turbulence and intermediaries, among others. Regarding design factors, this work highlights the role of attraction and facilitation. Additionally, the repetitive implementation of innovation contests creates a corporate culture that promotes OI activities. Practical implications - Managers will understand that they can use innovation contests as a managerial tool, and knowing the factors that need to be taken into account when implementing an innovation contest will help SMEs managers to make better use of this practice. Originality/value - This case study enriches the literature of both innovation contests and topics relevant to SMEs. Based on a theoretical framework of the design factors that influence the implementation of innovation contests, the authors propose a research framework that incorporates those context factors in association with an SME.
Autores: Rodríguez, María Isabel; Alfaro, José Antonio;
Revista: UNIVERSIA BUSINESS REVIEW
ISSN 1698-5117  Nº 50  2016  págs. 142 - 157
Este articulo tiene como objetivo general el análisis de las prácticas de innovación abierta que pueden ser implementadas por PYMEs proveedoras de servicios en el sector de automoción. Para ello, ilustramos, a través de los resultados de un estudio de casos múltiple, su utilidad para satisfacer las necesidades cambiantes del mercado y seguir siendo competitivos. Finalmente describimos en detalle una de estas prácticas que puede contribuir a la sistematización del proceso de desarrollo de nuevos productos: los co-desarrollos.
Autores: Cazón, Aitor; Matey, Luis Mariano; Rodríguez, María Isabel; et al.
Revista: DYNA
ISSN 0012-7361  Vol. 90  Nº 6  2015  págs. 621 - 627
Additive Manufacturing (AM), commonly called 3D printing, is the process of making objects layer upon layer from 3D model data in order to test design prototypes (called Rapid Prototyping), to obtain production tools (Rapid Tooling) or to build and then use that prototype as a final part in the final product (Direct Manufacturing). This paper aims to show new applications of the Direct Digital Manufacturing philosophy for sports and medical sciences. Particularly, the aim of the study is to present three case-studies that take advantage of AM so as to enable practitioners and professional players to manufacture customised 1) face masks to protect the face during sports or everyday activities, 2) foot insoles to treat foot problems and 3) shin pads to be worn by football players and shield them from shin injuries. In every case study, prior to fabrication, anthropometric features of volunteer patients were captured by a low-cost 3D scanner and a user-friendly semi-automatic modelling procedure was developed with Rhinoceros and Grasshopper in order to model and customise several features of the three products. The resulting virtual designs of the three products were manufactured with the help of four different AM devices while design workflow and the suitability of the physical prototypes were evaluated against volunteers and practitioners. Feedback results from practitioners and volunteers were satisfactory enough in order to consider the design tools provided as a good starting point for future developments. Further work is still necessary in terms of improvement to the design algorithm, inclusion of new materials and test procedures to verify the physical prototypes to the final user requirements. Nevertheless, this work confirmed that the combination of existing tools of three-dimensional digitisation, user-friendly semi-automatic algorithm within a Computer Aided Design (CAD) and Additive Manufacturing can lead to a technologically feasible and cost-effective solution to improve the traditional design and manufacturing process of customised orthotic and protective devices for sports and medical sciences.
Autores: Rodríguez, María Isabel; Alfaro, José Antonio; Sandulli, F.;
Revista: DYNA MANAGEMENT
ISSN 2340-6585  Vol. 3  Nº 1  2015  págs. 1 - 12
Open innovation represents a research field into the business organization area. Though, there are many researchers and practitioners from different areas and sectors that consider that OI is a wide and diffuse concept. This research encompasses into the open innovation literature, but it is focused on the automotive sector, and more specifically, in the providers of services of Original Equipment Manufacturers (OEMs). Our study has a double objective: on the one hand, to illustrate which open innovation practices are implemented by OEMs¿ suppliers. We show the agents that participate in each of them, and the objectives that the providers have got with its implementation. On the other hand, we highlight the factors that are most relevant to put into practice these open innovation practices for those firms whose main customers are OEMs. In order to get these objectives, we have carried out a multiple case study with seven suppliers from different departments of OEMs. Our findings show that the most common practice these firms implement is the joined development, even they have found relevant performance with regional innovation cluster, innovation contest, inward and outward licensing of IP, joint venture and lead user method. This research permits obtaining a set of conclusions that may be helpful for both the researchers interested in OI and those managers and practitioners that implement OI practices in order to be more fruitful for their firms.
Autores: C. Cao; Rodríguez, María Isabel; Cazón, Aitor; et al.
Libro:  Advances on Mechanics, Design Engineering and Manufacturing II
2019  págs. 41 - 51
The increasing relevance of occupational injuries and illness related to lean manufacturing strategies in automotive assembly lines brings an increasing interest in this industry by the research and development of new tools and methods for the evaluation and prevention of work-related musculoskeletal disorders (WMSDs). However, few studies have focused on assessing the exposures to the hand region whereas disorder in this region remain at the primary tier of the prevalence ranking. Herein, this paper presents a low-cost, wearable inertial measurement unit (IMU) to measure workplace demands. This technology was selected after analysing an assessment scale composed of seven of the common ergonomic assessment tools and methods. After a brief verification through a laboratory goniometry experiment, eleven joint angles of a volunteer¿s hand were measured. The results indicated that the mean difference between the values measured by participants and the values obtained directly from the wearable is 2.44°, which has the same accuracy level of the commercial products. The proposed device is scalable enough to be iterated by further improvements, including conductive fabric 3D printing technology.
Autores: Rodríguez, María Isabel; Morer, María de la Paz;
Libro:  Aprender en Innovación Inclusiva: un reto para proyectos innovadores y políticas territoriales
2016  págs. 101-121
Autores: Alfaro, José Antonio; Mejía, A.; Recalde, Mónica; et al.
2017 
Este estudio ha sido elaborado por el grupo de investigación «Innovation Decisions in the Business Environment» de la Facultad de Ciencias Económicas y Empresariales de la Universidad de Navarra, bajo el proyecto «Las asociaciones empresariales como agentes impulsores de la innovación estratégica en las empresas de Navarra: análisis y propuestas de mejora», financiado por la Fundación Caja Navarra

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