Research design | EPFL Graph Search

Research design refers to the overall strategy utilized to carry out research that defines a succinct and logical plan to tackle established research question(s) through the collection, interpretation, analysis, and discussion of data. Incorporated in the design of a research study will depend on the standpoint of the researcher over their beliefs in the nature of knowledge (see epistemology) and reality (see ontology), often shaped by the disciplinary areas the researcher belongs to. The design of a study defines the study type (descriptive, correlational, semi-experimental, experimental, review, meta-analytic) and sub-type (e.g., descriptive-longitudinal case study), research problem, hypotheses, independent and dependent variables, experimental design, and, if applicable, data collection methods and a statistical analysis plan. A research design is a framework that has been created to find answers to research questions. Design types and sub-types There are many ways to c

Exploration of micro-acoustic spectrometry techniques

Florian Fernand Hartmann

This master’s thesis aimed at exploring the field of micro-acoustic spectrometry using surface acoustic waves. The objectives of this project were to design and fabricate a platform for the detection and characterization of bioentities. Design of a delay line based on the experience and knowledge of the ANEMS group and on investigation of existing solutions was performed. Different configurations and types of transducers were simulated to come up with some meaningful designs for fabrication. The devices were fabricated in the clean rooms at EPFL with a specific process flow used for the suspended structures. Extensive simulation of bidirectional and unidirectional transducers were carried out in order to understand their behavior and to be able to use them as the elements of the sensing platform. Setbacks prevented the completion of the fabrication and no real measurements could be done before the end of this project, but the simulations gave nice perspectives for the targeted application. The potential of surface acoustic waves to detect modifications in the elasticity or the density of a material could be witnessed in the last simulations.

2022

A Digital Platform connecting Academia and Small Businesses: An opportunity for Knowledge Management Experiments

Quentin Adrien Cavillier

Digital transformation is one of the biggest phenomena of this decade. One enabler of this revolution was cloud computing. Today, software engineers can deliver software as a service (SaaS), which is accessible to users through the Internet. Slack, Shopify, and Dropbox are examples of successful SaaS. We are experiencing an emergence of numerous small web applications with easy-to-use features for specific domains such as project management, accounting, resources management, customer relationships, and so forth. Thus, SaaS has been recognised as particularly well suited for the digital journey of small enterprises. However, surveys conducted by governmental agencies reveal a low adoption rate of SaaS by small enterprises in traditional sectors such as construction, services, and dealership. Previous studies have highlighted a lack of top management support, a weak relative advantage perceived, and a lack of knowledge as the key reasons for this low level of adoption. Whilst academic research defines these critical factors, it has not found potential solutions to mitigate them. Thus, this thesis presents two exploratory studies to enhance the adoption of digital practices by small traditional enterprises (STEs). A first study explored the value of leading collaborative projects between students and STEs about the assessment of SaaS solutions. A secondary objective of this initiative was the design of a platform acting as an open innovation platform. A three-year study allowed the completion of thirty-nine projects and the testing of two different platform designs. The feedback from students demonstrated the value of a well-structured platform composed of different management models for each project phase. Furthermore, 67 per cent of the STEs involved on the platform acknowledged the value of such collaborative projects. However, the collaborations did not improve top management support, and projects tended to stagnate because of various organisational factors. A second study, using a mixed-methods research design, was performed to explore the relations amongst the organisational factors acting as enablers and barriers to the digitalisation of STEs. The objective was to improve understanding of TSEs' situation and devise a proposition to enhance top management support. An academic contribution of this study was the design and application of a conceptual framework combining organisational factors from the literature on dynamic capabilities, organisational inertia, and intellectual capital. The combination of the qualitative observations and quantitative results highlighted the importance of the sensing and leadership capabilities for STE directors. They also revealed the mediator effect of the relational capability on the development of these latter. Therefore, this thesis makes important contributions to the literature on open innovation by defining a new field for leading knowledge management experiments. It also contributes to develop a comprehensive overview of the organisational factors affecting STEs' adoption. A further major contribution is the potential value of the digital platform to innovate the services of practitioners, such as governmental agencies and consultants, that support STEs on their digital transformation journey. In conclusion, this research is valuable in opening the discussion about potential innovations that might reshape the relationship academia-business.

EPFL2019

Opacité et transparence dans le design d'un dispositif de surveillance urbain : le cas de l'IMSI catcher

Félicien Michel Marie Goguey

This thesis assesses the surveillance operated on the mobile phone network by governmental actors (intelligence agencies, police, army) and the relationship between monitored spaces and their users. Indeed, some new surveillance devices used by intelligence services redefine surveillance spatiality raising new questions in this field of research. More specifically this research focuses on one specific object: the IMSI catcher, a monitoring apparatus of the cellular network that intercepts cellphones' identity and some communications in a given area by mimicking the activity of a cell tower. While this kind of device seems to offer a tactical and a security interest in the fight against terrorism and against crime, many civil liberties organisations such as the Electronic Frontier Foundation, Privacy International and _La Commission nationale de l'informatique et des libertÃ©s are concerned about the potential of an uncontrolled surveillance ; indeed, the controversial nature of the device could endanger certain individual and public rights. What is this technical object and which new issues comes with its use in surveillance? How and from which perspective is it problematic What does the IMSI catcher teaches us on the potential future of surveillance regimes? I look into this specific device case in a research framework at the intersection of design research practices, science and technology studies (STS) and surveillance studies. First, I deal with this surveillance apparatus as a technical object, from a perspective fed by the theoretical framework of concretization and technical lines proposed by Gilbert Simondon and Yves Deforge, through the analysis of a visual and technical documentation. Second, I use a research by design approach to explore certain assumptions regarding the nature of the object itself, its functioning and its "concrete" aspect â or rather "non-concrete" in the present case â with the help of approaches borrowed to reverse engineering and reconstitution, close to media archeology. Then, I explore possible opposition and protest trajectories with the help of prototypes designed with critical design and speculative design methods. Finally, through the writing of prospective scenarios, I build a design fiction that offers a synthesis, potentially subject to debate, around the IMSI catcher's uses, present and to come, and more broadly on the potential future of surveillance regimes.