Semester s projects at UTT in Autumn 2011

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1 Project title: Design of special rapid prototyping machine Our laboratory intend to create a new technique for medium to large scale rapid prototyping. This involve the design of new machine allowing to pick and place and eventually glue small bits of materials involved in the process. We therefore propose a subject for a mechatronics oriented profile that would allow a student to design from scratch this new machine. Knowledge in CAD software like Solidworks and also Labview would be appreciated while not compulsory. Contact: Laurent Daniel Project title: Semiconductor reflectometry The goal of this project is to characterise an home built reflectometry set up. For that, the student will make sure the experiment is ready to go, then some measurements will be taken on various types of known semiconductors. Properties of these semiconductor structures (mostly thin films) will be determined using models to fit the reflectometry experiments. Finally, these models will be applied to home grown semiconductors to determine their properties. Key words: reflectometry, semiconductors, refraction index, spectroscopy Project title: Microphotoluminescence of nanostructures The goal of this project is to use the microphotoluminescence set up in order to address optically individual nanostructures such as nanowires. Semiconductor spectroscopy will then be studied for these structures as well power and polarization dependence. Microphotoluminescence is a technique that allows the excitation of micro size areas in order to confine the excitation. By the same token, the luminescence is collected on a same micro size region of the sample. Key words: nanostructures, semiconductors, optical spectroscopy Project title: Designing a portable microphotoluminescence set up with scanning mirrors. The goal of this project is to design a microphotoluminescence set up on a breadboard in order to minimize the size of the experiment. The second part of the project will consist in driving scanning mirrors in order to be able to do scanning microphotoluminescence. Key words: Design, CAO, Scanning confocal microscopy, optics

2 Project title: Propects in quantum steganography This project will consist in studying the possibility to transpose the so called steganography technique used for hiding messages to quantum cryptography. This project will mostly be simulation and modeling using programming software such as Matlab. This will be in coordination with the Laboratory of Systems Modelling and Dependability (LM2S). Key words: quantum cryptography, quantum information, simulation, quantum optics Project title: Single photon source made of single nanodiamonds This project will consist in studying nanodiamonds as single photon sources. The student will study the emission properties of such systems and will show that they are indeed single photon sources. Optical spectroscopy and photon correlation will be the 2 main techniques involved here. The nanodiamonds will be commercially available but will have to be processes and studied during this project. Key words: single photon source, quantum optics, optical spectroscopy, photoluminescence Other projects in the following fields can be organized: Reliability & maintenance Signal processing Sensor networks Machine learning

3 Research proposal Due to its excellent corrosion resistance and its biocompatibility, austenitic 316L stainless steel is a widely used material in environments such as the petrochemical, chemical, nuclear, and food industries. However, in its coarse grained (CG) state, austenitic stainless steel possesses relatively low strength and poor wear resistance that make it unsuitable for many structural applications. It is well known that a strong refinement of the grain size can lead to additional increase of strength due to the Hall Petch relationship. So, with the emergence of methods to produce nanostructures, new routes to enhance properties of metals and alloys are arising. Among them, the recently developed surface mechanical attrition treatment (SMAT patented treatment in 2000 by our lab LASMIS) appears as a promising technique to generate a nanocrystallised layer on the surface of metallic materials. SMAT provides an alternative approach to effectively upgrade the global properties of engineering materials and this, without change of the chemical composition. As SMAT is simple, flexible and low cost, this technique is potentially very useful in industrial applications. In this work, a nanocrystallised layer will be synthetized at the surface of 316L stainless steel by means of SMAT performed at different temperatures. Investigations of the SMATed microstructure (optical and electron microscope observations, X ray diffraction measurements), the residual stresses and the micro hardness will be carried out (all the equipments are available in our university). In a second step, the influence of the SMAT on the mechanical properties of the treated steel specimens will be studied (tensile and/or fatigue tests). For more information, please contact Mrs Delphine Retraint Tel.: ; fax: E mail address: delphine.retraint@utt.fr

4 Research proposal (Babiga BIRREGAH, University of Technology of Troyes) A Familiar Stranger based approach for communities identification in social networks of the web Requirement: Algorithms; Graph Theory; Probability. The recent growth of social networks of the Internet has led to new ways of communication and information sharing between members of the same network. An individual (a node) can play several roles in a social network. He may, for example, interact (directly or indirectly) with people who are familiar to him, those who are completely strangers, or even "familiar strangers" to him". The "Familiar Strangers" are individuals who are not directly connected but who share the same "attributes" in their activities in the network. One of the major challenges in the social network analysis is to understand the dynamics of its communities to better monitor and represent them. As in the real society, the social link on a virtual platform will be determined by time, space, attributes (digital identity, interests, etc.) and interaction (data exchange). While the state of art in SNAM (social network analysis and mining) is full of work that takes into account attributes and interactions, few works integrate spatio temporal constraints. The latest advances in location based services via mobile phones and other smart devices, open up new perspectives for conceptualizing the notion of virtual space. This conceptualization will contribute ultimately to refine the definition of the concept of community, specifically the notion of familiarity that we can define as an individual's propensity to be or to come in contact with another individual or community. The work required includes: 1. Produce a state of the art on the concept of "Familiar Strangers" (FS) applied to social network of the Web 2. Build a small application (Java or C ++ or other) to implement a FS algorithm and visualize the result on some graphs 3. Build a simulation tool of evolution and formation of communities based on a probability of familiarity For more information send a mail to: babiga.birregah@utt.fr

5 Project title: Implementation of a linux Kernel on FPGA The aim of this project is to implement a system on chip which run under linux. To do : To design the peripherals with VHDL To implement an opencore processor or microblaze. To develop and run software tests To implement a linux kernel. References : FPGA Prototyping by VHDL examples, PONG P. CHU, Wiley, Embedded Linux System Design and Development, P. Raghavan, A. Lad, S. Neelakandan,Auerbach Publications, Project title: Design of a video processing system with FPGA The aim of this project is to design a video system on FPGA. This will drive digital camera and VGA output. This system implements the basic real time video processing Algorithm (filtering and compression) To do : To design a camera driver To design a basic graphic card on FPGA To implement the real time video processing algorithm References : FPGA Prototyping by VHDL examples, PONG P. CHU, Wiley, 2008.