Research news at MINES ParisTech
MINES ParisTech ranked 6th best university in France and 167th worldwide by Center for World University Rankings
Center for World University Rankings rates MINES ParisTech among top universities
The CWUR, based in Jeddah, Saudi Arabia, claims to be "the only global university ranking that measures the quality of education and training of students as well as the prestige of the faculty members and the quality of their research without relying on surveys and university data submissions".
Earth sciences and environment
Towards a new constitutive law for the bolt-grout interface
Theoretical and experimental study of fully grouted rockbolts and cablebolts under axial loads
In the thesis of Laura Blanco Martin, the bolt-grout interface of fully grouted rockbolts has been studied with the aim of determining its constitutive law. For this purpose, axial loadings acting on the bar have been considered and theoretical and experimental research conducted. The theoretical investigations link the response of the surrounding materials (bolt, grout and ground) to that of the interface, which is not directly accessible.
Pull-out tests have been carried out to obtain experimental information. Combining the theoretical developments with the test results, the interface variables can be determined. This procedure proves that, in order to study the bolt-grout interface accurately, the behaviour of the surrounding materials should be well known.From the available data, a semi-empirical formulation of the interface response is proposed. The tangential behaviour suggests that friction is not the only component to the shear stress. The normal response, which is more difficult to ascertain, depends on the bolt profile.
Read moreEnergy and process engineering
Assisting low energy consumption building design
To gain professional experience with MINES ParisTech
Maxime Trocmé's PhD thesis took place within the framework of a partnership between the Center for Energy and processes of MINES ParisTech and VINCI (World largest construction company). The work was full time conducted in the R&D department of VINCI Construction France.
After a motivating six-month internship at the CEP and engineering school graduation, Maxime Trocmé was desirous to acquire more competence on building eco-design. This doctoral thesis was a way to fulfil this wish in a theoretical (building models) and practical way (real building studies). Since it took place within the framework of a CIFRE convention, it was also an opportunity to gain professional experience.
Mechanical and Materials engineering
Thermo-mechanical modelling of a screwing-threading process
Local approach to fracture on a semi-crystalline thermoplastic : the polyoxymethylene
The increasing use of polymers in engineering structures is promoted by the need to reduce both cycle/cost production and the weight of these structures. PSA Peugeot Citroën initiated research works to design the assembling process using metallic screwing/threading on polymers. It consists in directly taping the polymeric piece during the mounting operation by using self-threading metallic screw.
The final objective of the work of Jonathan Ricard deals with the ability to numerically (finite element) model the screwing/threading operation. This numerical tool offers the possibility to perform a large campaign of study highlighting the sensitivity of the assembly procedure to a significant range of parameters.
Mathematics and systems
Medical image processing
Image processing methods for computer-aided screening of diabetic retinopathy
Screening systems are an essential element of diabetic retinopathy prevention. The efficiency of these systems could benefit from computer-aided approaches. Eye fundus image processing methods are developed in this thesis, in order to detect lesions and produce pathological scores.
The work of Xiwei Zhang has been integrated in the TeleOphta system, which achieves a good performance, comparable to human experts.Economics, management, society
Combining Science and Technology Studies (STS) and political sciences to understand the production of tools of governement
Accounting and Health Care: Costs, Tariffs and Public Hospitals in France
How costs and tariffs have become pivotal policy instruments to govern public hospitals in France since the early 1980’s? What kind of controversies do they produce and what feedback effect do these controversies have on these instruments?
These are the questions Pierre-André Juven proposes to answer in his PhD dissertation by analysing the genealogy, the uses and the transformations of several policy devices: information systems, cost accounting, a budgetary regulation instrument and a pricing payment system.
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