A Comprehensive Test and Diagnostic Strategy for TCAMs

Content addressable memories (CAMs) are gaining popularity with computer networks. Testing costs of CAMs are extremely high owing to their unique configuration. In this thesis, a fault analysis is carried out on an industrial ternary CAM (TCAM) design, and search path test algorithms are designed. The proposed algorithms are able to test the TCAM array, multiple-match resolver (MMR), and match address encoder (MAE). The tests represent a 6x decrease in test complexity compared to existing algorithms, while dramatically improving fault coverage

Design, Fabrication, Processing, and Testing of Micro-Electro-Mechanical Chemical Sensors

Chemical microsensors are a new field integrating chemical thin film technology with solid-state fabrication techniques to make devices capable of detecting chemicals in the environment. This thesis evaluated commercially available fabrication processes and numerous sensor designs for working chemical sensors. The commercial processes used were MUMPS for surface micromachined devices and MOSIS for bulk micromachined devices. Overall, eight fabrication runs and 29 different designs were made. Of these designs, two were shown to work effectively. Other designs failed due to fabrication problems and design errors that caused release problems. One design that worked was a surface micromachined chemoresistor with interdigitated gold sensing fingers and a polysilicon heater. The other design was a bulk micromachined suspended bridge structure with bimorphic action drivers at each end. Thin films were also investigated to determine which would have the most affinity to specific chemicals and therefore provide measurable responses. Once selected, a technique was developed to apply the thin film in such a way as not to damage the devices. Several thin films were identified for application, but only two polymers, poly(isobutylene) and poly(vinyl tetrachloride), were successfully applied and tested. Because the sensing devices were released micro-electro-mechanical structures, they were extremely susceptible to forces and could be damaged easily. This thesis showed that released MEMS devices could be subjected to a complete photolithographic process including spin-coating, baking, exposure, and development without damage. A hybrid mask process was developed that used photoresist to expose sensing areas for thin film deposition, bond pads for packaging, and a physical mask to cover regions and bond pads during the actual film application

HICPAC Meeting Minutes August 22, 2023

Publication date from document properties.2023-August-HICPAC-Summary-508.pd

Green Grain: waste-free made easy: a system designed to reduce food packaging waste

O objetivo desta tese é desenvolver um sistema de compra de alimentos com desperdício zero e projetar uma marca que fosse um espelho desse ADN verdadeiro. Em última instancia, esta tese espera encontrar uma solução inovadora para reduzir a quantidade de embalagens descartáveis de alimentos que se tornam resíduos ambientais prejudiciais. O Design Thinking e a investigação ativa foram as metodologias que orientaram o projeto. Entrevistas, observações de sites, e questionários foram alguns dos métodos utilizados nas fases de inovação, iteração e produção. O teste de validação utilizou uma apresentação com uma recolha de dados quantitativos e qualitativos. Os dados foram analisados e reforçaram o sucesso tanto da marca, como do sistema inovador, que oferecem uma real, e percebida, mais valia para o ambiente.The objective of this thesis study is to develop a zero-waste system of buying food and to design a brand that reflects that honest approach. Ultimately, this thesis hopes to find a new and innovative solution to reduce the amount of one-time-use food packaging that becomes harmful environmental waste. Design thinking and action research comprised the methodologies that guided the project. Interviews, site observations, and polls were also included in innovation, iteration, and production. Validation testing utilized a presentation and survey with both quantitative and qualitative results. The data collected reinforced the success of both the brand and the innovation in offering real and perceived environmental value

NASA Tech Briefs, May 1991

Topics: New Product Ideas; NASA TU Services; Electronic Components and Circuits; Electronic Systems; Physical Sciences; Materials; Computer Programs; Mechanics; Machinery; Fabrication Technology; Mathematics and Information Sciences; Life Sciences

Study of vertex silicon detectors for LHC experiments

This thesis deals with the development of pixel and microstrip silicon detectors, to be used in the vertex system of LHC experiments. The presented chip for the readout of hybrid pixels is the baseline of the one foreseen for the ALICE experiment. The microstrip detector is the prototype for the VErtex LOcator of the LHCb experiment. The main aspects of the work related to a vertex detector are discussed, being the two sensor options in some sense complementary in covering the vertex system problems and requirements

NASA Laser Light Scattering Advanced Technology Development Workshop, 1988

The major objective of the workshop was to explore the capabilities of existing and prospective laser light scattering hardware and to assess user requirements and needs for a laser light scattering instrument in a reduced gravity environment. The workshop addressed experimental needs and stressed hardware development

Spread spectrum-based video watermarking algorithms for copyright protection

Merged with duplicate record 10026.1/2263 on 14.03.2017 by CS (TIS)Digital technologies know an unprecedented expansion in the last years. The consumer can now benefit from hardware and software which was considered state-of-the-art several years ago. The advantages offered by the digital technologies are major but the same digital technology opens the door for unlimited piracy. Copying an analogue VCR tape was certainly possible and relatively easy, in spite of various forms of protection, but due to the analogue environment, the subsequent copies had an inherent loss in quality. This was a natural way of limiting the multiple copying of a video material. With digital technology, this barrier disappears, being possible to make as many copies as desired, without any loss in quality whatsoever. Digital watermarking is one of the best available tools for fighting this threat. The aim of the present work was to develop a digital watermarking system compliant with the recommendations drawn by the EBU, for video broadcast monitoring. Since the watermark can be inserted in either spatial domain or transform domain, this aspect was investigated and led to the conclusion that wavelet transform is one of the best solutions available. Since watermarking is not an easy task, especially considering the robustness under various attacks several techniques were employed in order to increase the capacity/robustness of the system: spread-spectrum and modulation techniques to cast the watermark, powerful error correction to protect the mark, human visual models to insert a robust mark and to ensure its invisibility. The combination of these methods led to a major improvement, but yet the system wasn't robust to several important geometrical attacks. In order to achieve this last milestone, the system uses two distinct watermarks: a spatial domain reference watermark and the main watermark embedded in the wavelet domain. By using this reference watermark and techniques specific to image registration, the system is able to determine the parameters of the attack and revert it. Once the attack was reverted, the main watermark is recovered. The final result is a high capacity, blind DWr-based video watermarking system, robust to a wide range of attacks.BBC Research & Developmen

Data Parallel C++

Learn how to accelerate C++ programs using data parallelism. This open access book enables C++ programmers to be at the forefront of this exciting and important new development that is helping to push computing to new levels. It is full of practical advice, detailed explanations, and code examples to illustrate key topics. Data parallelism in C++ enables access to parallel resources in a modern heterogeneous system, freeing you from being locked into any particular computing device. Now a single C++ application can use any combination of devices—including GPUs, CPUs, FPGAs and AI ASICs—that are suitable to the problems at hand. This book begins by introducing data parallelism and foundational topics for effective use of the SYCL standard from the Khronos Group and Data Parallel C++ (DPC++), the open source compiler used in this book. Later chapters cover advanced topics including error handling, hardware-specific programming, communication and synchronization, and memory model considerations. Data Parallel C++ provides you with everything needed to use SYCL for programming heterogeneous systems. What You'll Learn Accelerate C++ programs using data-parallel programming Target multiple device types (e.g. CPU, GPU, FPGA) Use SYCL and SYCL compilers Connect with computing’s heterogeneous future via Intel’s oneAPI initiative Who This Book Is For Those new data-parallel programming and computer programmers interested in data-parallel programming using C++