Advanced Micro Devices | EPFL Graph Search

Advanced Micro Devices (AMD) est un fabricant américain de semi-conducteurs, microprocesseurs, cartes graphiques basé à Santa Clara (Californie). La compagnie est fondée le par un groupe d'ingénieurs et de dirigeants de Fairchild Semiconductor. Les cofondateurs d'AMD sont Jerry Sanders, , John Carey, Sven Simonsen, Jack Gifford, Frank Botte, Jim Giles et Larry Stenger. La flèche du logotype de la compagnie dirigée vers la droite symbolise sa croissance dans le « droit chemin » (« the right way »). En 2006, AMD pointe à la des 20 plus grands fabricants de semi-conducteurs, derrière Intel, Samsung, Texas Instruments, Toshiba, STMicroelectronics, Renesas et Hynix. Au premier trimestre 2007, la chute d'AMD dans ce classement est vertigineuse puisque la société pointe à la . Il est par contre le deuxième fournisseur de microprocesseurs pour ordinateur PC à architecture x86, après Intel. Le marque le retour de la firme sur le marché des semi-conducteurs puisque l'action du constructeur

Pyramic array: An FPGA based platform for multi-channel audio acquisition

Juan Azcarreta Ortiz

Microphone arrays techniques present compelling applications for robotic applications. Those techniques can allow robots to listen to their environment and infer clues from it. Such features might enable capabilities such as natural interaction with humans, interpreting spoken commands or the localization of victims during search and rescue tasks. However, under noisy conditions robotic implementations of microphone arrays might degrade their precision when localizing sound sources. For practical applications, human hearing still leaves behind microphone arrays. Daniel Kisch is an example of how humans are able to efficiently perform echo-localization to recognize their environment, even in noisy and reverberant environments. For ubiquitous computing, another limitation of acoustic localization algorithms is within their capabilities of performing real-time Digital Signal Processing (DSP) operations. To tackle those problems, tradeoffs between size, weight, cost and power consumption compromise the design of acoustic sensors for practical applications. This works presents the design and operation of a large microphone array for DSP applications in realistic environments. To address those problems this project introduces the Pyramic sound capture system designed at LAP in EPFL. Pyramic is a custom hardware which possesses 48 microphones distributed in the edges of a tetrahedron. The microphone arrays interact with a Terasic DE1-SoC board from Altera Cyclone V family devices, which combines a Hard Processor System (HPS) and a Field Programmable Gate Array (FPGA) in the same die. The HPS part integrates a dual-core ARM-based Cortex-A9 processor, which combined with the power of FPGA design suitable for processing multichannel microphone signals. This thesis explains the implementation of the Pyramic array. Moreover, FPGA-based hardware accelerators have been designed to implement a Master SPI communication with the array and a parallel 48 channels FIR filters cascade of the audio data for delay-and-sum beamforming applications. Additionally, the configuration of the HPS part allows the Pyramic array to be controlled through a Linux based OS. The main purpose of the project is to develop a flexible platform in which real-time echo-location algorithms can be implemented. The effectiveness of the Pyramic array design is illustrated by testing the recorded data with offline direction of arrival algorithms developed at LCAV in EPFL.

2016

The Limits of Composable Crypto with Transferable Setup Devices

Miyako Ohkubo, Serge Vaudenay

UC security realized with setup devices imposes that single instances of these setups are used. In most cases, UC-realization relies further on other properties of the setups devices, like tamper-resistance. But what happens in stronger versions of the UC framework, like EUC or JUC, where multiple instances of these setups are allowed? Can we formalise what it is about setups like these which makes them sometimes hinder UC, JUC, EUC realizability? In this paper, we answer this question. As such, we formally introduce transferable setups, which can be viewed as setup devices that do not (publicly) disclose if they have been maliciously passed on. Further, we prove the general result that one cannot realize oblivious transfer (OT) or any "interesting" 2-party protocol using transferable setups in the EUC model. As a by-product, we show that physically unclonable functions (PUFs) themselves are transferable devices, which means that one cannot use PUFs as a global setups; this is interesting because non-transferability is a weaker requirement than locality, which until now was the property informally blamed for UC-impossibility results regarding PUFs as global setups. If setups are transferable (i.e., they can be passed on from one party to another without explicit disclosure of a malicious transfer), then they will not intrinsically leak if a relay attack takes place. Indeed, we further prove that if relay attacks are possible then oblivious transfer cannot be realized in the JUC model. Linked to the prevention of relaying, authenticated channels have historically been an essential building stone of the UC model. Related to this, we show how to strengthen some existing protocols UC-realized with PUFs, and render them not only UC-secure but also JUC-secure.

ACM2015

Visualization, Interactive Handling and Simulation of Molecules in Commodity Augmented Reality in Web Browsers Using moleculARweb's Virtual Modeling Kits

Luciano Andres Abriata, Fabio Jose Cortes Rodriguez, Matteo Dal Peraro, Lucien Fabrice Krapp

moleculARweb (https://molecularweb.epfl.ch) began as a website for education and outreach in chemistry and structural biology through augmented reality (AR) content that runs in the web browsers of regular devices like smartphones, tablets, and computers. Here we present two evolutions of moleculARweb's Virtual Modeling Kits (VMK), tools where users can build and view molecules, and explore their mechanics, in 3D AR by handling the molecules in full 3D with custom-printed cube markers (VMK 2.0) or by moving around a simulated scene with mouse or touch gestures (VMK 3.0). Upon simulation the molecules experience visually realistic torsions, clashes, and hydrogen-bonding interactions that the user can manually switch on and off to explore their effects. Moreover, by manually tuning a fictitious temperature the users can accelerate conformational transitions or 'freeze' specific conformations for careful inspection in 3D. Even some phase transitions and separations can be simulated. We showcase here these and other features of the new VMKs connecting them to possible specific applications to teaching and self-learning of concepts from general, organic, biological, and physical chemistry; and in assisting with small tasks in molecular modelling for research. Last, in a short discussion section we overview what future developments are needed for the 'dream tool' for the future of chemistry education and work.

SWISS CHEMICAL SOC2022

Pyramic array: An FPGA based platform for multi-channel audio acquisition

Juan Azcarreta Ortiz

2016