Conference Presentations by Mario Gazziro
Proceedings of SBGames, 2016
O Tour Virtual 3D pela Vila de Paranapiacaba é um projeto cultural
e educacional que busca fazer ... more O Tour Virtual 3D pela Vila de Paranapiacaba é um projeto cultural
e educacional que busca fazer um resgate histórico da parte
baixa da vila por meio de reconstrução virtual em um ambiente tridimensional interativo e explorável, reproduzindo em um simulador
computacional as sensações que um passeio real pelo local passaria
ao seu visitante. Contendo a primeira linha férrea que ligava o
litoral à região metropolitana de São Paulo – construída para transportar
produtos de forte impacto econômico na época, como o café
– Paranapiacaba abrigava os operários responsáveis pela manutenção
da estrutura ferroviária, desenvolvida por engenheiros ingleses,
o que de certa forma explica os padrões arquitetônicos encontrados
na vila. Sua importância na história, economia e cultura do Estado
de São Paulo é representada por meio de modelos tridimensionais
fiéis às construções originais, incluindo o relevo da região, e informações
multimídia dispostas de forma interativa pelo cenário.
Worshop de Visão Computacional, 2007
This paper describes a neural network application for landscapes contour visualization as musical... more This paper describes a neural network application for landscapes contour visualization as musical composition. During the training phase, the neural network learns certain aspects of musical structure by means of measure examples taken from melodies of the training set. The chosen melodies for training are folk melodies, once they are simple and monophonic. During composition, the system uses the measures learned to compose new melodies using as input the extracted data of the landscape contour.
Workshop of Augmented Reality, 2004
The "VOID" project (founded by the Langlois Foundation, Canada; and supported by the V2_Lab, at t... more The "VOID" project (founded by the Langlois Foundation, Canada; and supported by the V2_Lab, at the V2_Org in the Netherlands) is a work in progress that intends to create an interaction that introduces the user to an observational situation that is continuously eroding the position of the user as a super-observer (an observer that doesn't influence the object observed, as seen in the Classical Objectivity). The user, while indirectly investigating and observing the properties of a supposed internal reality accessed through an interface, is induced to realize that there's nothing to see there despite the interface itself. The interface is its own observed volatile object, which is continuously disturbed by the presence of the user. In this event without horizon, its borders are the borders of the interface (which could make "palpable" the walls of the Cartesian prison?). Like this, it intends to reverse the situation of an object-centred stage to a contextual and observer-oriented one; objectivity to observerrelativity. From autonomy to covariance, from dictatorship of subjectivity to the world of the machine.
online graphical tool that allows you to visualize money transfers within the government
EVA London, 2017
Natural user interface (NUI) can be defined ashuman-computer interaction systems in which theuser... more Natural user interface (NUI) can be defined ashuman-computer interaction systems in which theuser employs intuitive actions based on the humanbehaviour. Common examples of NUI interfacesare those ones that use multi-touch screens,gesture and sound recognition systems, andpainting tablet devices. Paper marbling is a paintingapproach in which the artist uses proper tools – ascombs and brushes – to interact with the paintsdeposited on an aqueous surface, producing thusmarble-like paintings. These paintings are thentransferred to an absorbent paper, which are used,for instance, as book cover. In this work, wepresent a computational marbling system thatincorporate NUI to easy the generation of marblingpatterns
Latin American Symposium on Circuits & Systems (LASCAS), 2018
Non-volatile memory technology is significant in the market of electronics products. Until now, F... more Non-volatile memory technology is significant in the market of electronics products. Until now, Flash memory has dominated the market of non-volatile memories, but due to its scalability problem, scientists have also been calling for new devices. Resistive random access memory ReRAM has attracted great attention due to its potential for flash memory replacement in next generation nonvolatile memory applications. This device is based on resistive switching (RS) phenomenon for operation, which is reversible and can be reversed repeatedly. In this work, device fabrication used doped graphene oxide with copper (GO + 1% Cu) and copper oxide (CuO) thin films. ITO (Indium Tin Oxide) and aluminum were used as contacts. Thin films are obtained by the dip coating technique. The mechanism of the resistive switching effect in doped graphene oxide thin film based devices has been investigated by macroscopic current-voltage (IxV) measurements. The RS originates from the formation and rupture of conducting filaments. In addition, switching effect in these study devices has a clear dependence on the electrode material. ReRAM device structures show unipolar resistive switching behavior.
SBSEG, 2019
Democracy depends on a large portion of voter’s trust in the integrity
of the process of electing... more Democracy depends on a large portion of voter’s trust in the integrity
of the process of electing their representatives. Thus, voting schemes need to be transparent and still guarantee the secrecy of the vote to ensure the integrity of elections. In this article, we propose a voting scheme using homomorphic encryption and commitment schemes. The system holds not only the confidentiality of the voters’ vote but also to allow them to audit the outcome of the election. The experimental results show that the system performs well for elections with small numbers of voters.
International Conference of the IEEE EMBS, 2010
This article describes the development of a dualmonitor visual stimulus generator that is used in... more This article describes the development of a dualmonitor visual stimulus generator that is used in neuroscience experiments with invertebrates such as flies. The experiment consists in the visualization of two fixed images that are displaced horizontally according to the stimulus data. The system was developed using off-the-shelf FPGA kits and it is capable of displaying 640x480 pixels with 256 intensity levels at 200 frames per second (FPS) on each monitor. A Raster plot of the experiment with the superimposed stimuli was generated as the result of this work. A novel architecture was developed, using the same DOT Clock for both monitors, and its implementation generates a perfect synchronism in both devices.
Advances in Control, Chemical Engineering, Civil Engineering and Mechanical Engineering, 2010
This paper presents a case study for Smart Gun Technology (SGT) based on radio frequency control.... more This paper presents a case study for Smart Gun Technology (SGT) based on radio frequency control. This system involves the use of a RFid tag implanted in the hand of the owner that will transmit its unique identification number to the electronic control inside the firearm. If the code in the hand of the user matches with the internal code stored inside the firearm then the electronic safety catch based on a solenoid device will be released, allowing it for firing. Besides it is a well know subject in the field of electronic weapons, here we present a case study of an operational system prototype, including detailed instructions for the RF coil design, power consumption reports and clinical instructions for the placement of the RFid tag inside the hand.
SIMP, 2013
O projeto "Ajeijadinho 3D" é uma iniciativa apoiada pela Universidade de São Paulo (Museu de Ciên... more O projeto "Ajeijadinho 3D" é uma iniciativa apoiada pela Universidade de São Paulo (Museu de Ciências e Pró-reitoria de Cultura e Extensão) que envolve a digitalização 3D das obras do escultor Antônio Francisco Lisboa, mais conhecido como Aleijadinho. O projeto fez uso de técnicas avançadas de aquisição e tratamento de malhas 3D para difusão cultural e auxílio à preservação das obras. A difusão foi feita por meio de um portal na web de simples acesso, de maneira que a população leiga tenha a possibilidade de conhecer tais obras em detalhes usando visualização 3D. O endereço do portal é http://www.aleijadinho3d.icmc.usp.br. As aquisições 3D foram realizadas ao longo de uma semana, no final do mês de julho de 2013 nas cidades de Ouro Preto, MG e Congonhas, MG. A digitalização foi feita com um equipamento especial fornecido pela empresa Leica Geosystems, o qual permitiu que as obras fossem digitalizadas a distâncias entre 10 e 30 metros, definindo um procedimento não invasivo, e com logística simplificada, sem a necessidade de preparação nem de isolamento dos sítios das obras. Em Ouro Preto, foram digitalizadas as igrejas de Francisco de Assis, Nossa Senhora do Carmo, e Nossa Senhora das Mercês; em Congonhas, foi digitalizado todo o Santuário do Bom Jesus de Matosinhos e seus 12 profetas. Uma vez digitalizadas, as obras passaram por um longo processo de preparação que exigiu o tratamento minucioso das malhas realizado pelos especialistas da Universidade de São Paulo em parceria com a empresa Imprimate. Palavras-chave: Aleijadinho, digitalização 3D, difusão, preservação do patrimônio cultural.
Simpósio Brasileiro de Computação Aplicada à Saúde, 2019
Posture is usually defined as the relative position of body elements. The ideal posture is the on... more Posture is usually defined as the relative position of body elements. The ideal posture is the one where the articulations are under a minimum amount of stress but it is never achieved due to individual factors. It is important to measure this lack of balance to minimize its effects in long term. This paper presents the creation of a multifunctional 3D scanner for posture analysis that allows the measurement of distances and angles between anatomic points of the body in a semi-automatic way, adding applications that only 3D information can aggregate, like the measurement of body volume to calculate the subject's body fat percentage and body part perimeters. This equipment was built using 2 RGB-D sensors combined with the reconstruction library ReconstructMe and the MeshLab software, creating an easy-to-use and interactive system. The developed application was used in postural analysis tests of a mannequin following the SAPO protocol of posture assessment and compared to the SAPO software, indicating good correspondence between the methods.
Simpósio em Sistemas Computacionais de Alto Desempenho, 2019
Modeling and inference of biological systems are an important fieldin computer science, presentin... more Modeling and inference of biological systems are an important fieldin computer science, presenting strong interdisciplinary aspects. In this context,the inference of gene regulatory networks and the analysis of their dynamicsgenerated by their transition functions are important issues that demand sub-stantial computational power. Because the algorithms that return the optimalsolution have an exponential time cost, such algorithms only work for gene net-works with only dozens of genes. However realistic gene networks present hun-dreds to thousands of genes, with some genes being hubs, i.e., their number ofpredictor genes are usually much higher than average. Therefore there is a needto develop ways to speed up the gene networks inference. This paper presentsa benchmark involving GPUs and FPGAs to infer gene networks, analysingprocessing time, hardware cost acquisition, energy consumption and program-ming complexity. Overall Titan XP GPU achieved the best performance, butwith a large cost regarding acquisition price when compared to R9 Nano GPUand DE1-SOC FPGA. In its turn, R9 Nano GPU presented the best cost-benefitregarding performance, acquisition price, energy consumption, and program-ming complexity, although DE1-SOC FPGA presented much smaller energyconsumption
Latin American Symposium on Circuits & Systems (LASCAS), 2020
Resistive random-access memories (ReRAMs) are based on a physical phenomenon called resistive swi... more Resistive random-access memories (ReRAMs) are based on a physical phenomenon called resistive switching (RS). Such a phenomenon occurs when the resistance of a dielectric undergoes changes in response to a strong external electric field. This change can be associated with logical level transition. RS process is reversible and can be reproduced countless times. In this work, the goal is to characterize three different devices and to verify if there is influence of the architecture and contact types. By varying the voltage, electrical current measurements were performed on the memory cells using a picoammeter. Through this analysis it is possible to detect SET and RESET of each device. With the expected performance, the current curves are compared as a function of the voltage. All ReRAM cells have sharp transitions in the SET stage. In the RESET process, devices still show an abrupt transition from low resistance state (LRS) to high resistance state (HRS), which is quite similar to the situation in SET stage. Resistive memory devices present threshold switching. As we have the comparison between the matrix and points structures, there is a probability that the architecture of the cell units can influence due to the electric field.
International Conference on 3D Body Scanning Technologies,, 2012
Excess body fat, or obesity often cause significant harm to health. The development of a mechanis... more Excess body fat, or obesity often cause significant harm to health. The development of a mechanism for evaluation of body fat more dynamic expedite the process of measurement. The goal of this work is the creation of a clinical analysis equipment capable of determining the percentage of fat in patients so rapidly, accurately, without the need for calibration after installation. A mechanical system has been developed by us in order to achieve acquire data over the whole human body. We conducted case study of a single evaluation a result compatible with the visual inspection performed by experts.
IWANN, 2017
Resistive random access memory ReRAM has attracted great attention due to its potential for flash... more Resistive random access memory ReRAM has attracted great attention due to its potential for flash memory replacement in next generation nonvolatile memory applications. Among the main characteristics of this type of memory, we have: low energy consumption, high-speed switching, durability, scalability and friendly manufacturing process. This device is based on resistive switching phenomenon for operation, which is reversible and can be played back repeatedly. In this work, eight different devices are developed and fabrication is made as follows: thin films are obtained by dip coating technique. The dip coating apparatus basically consists of a clamp which holds the substrate is dipped in a GO solution (graphene oxide) which containing dopant (cupper, iron or silver) or CuO (copper oxide). ITO (indium tin oxide) and aluminum contacts were evaporated. The devices were developed with purpose: intention is record and read information dynamically with appropriate algorithm. There is even the possibility of storing images. With these functions, it would be promising to enter the neuromorphic computing area that is one of the resistive memory applications. ReRAM technology advent represents a paradigm shift for artificial neural networks, being the best candidate for emulation of synaptic plasticity and learning mode.
SBGames, 2018
Paper marbling is a painting process where the artist makes use of special tools to carefully int... more Paper marbling is a painting process where the artist makes use of special tools to carefully interact with paints deposited on an aqueous surface to produce marblelike paintings transferred to an absorbent paper. In this work, we present an interactive and intuitive application that simulates the marbling process digitally in real-time. To this end, we first map the artist tools into a simple and intuitive user interface. Secondly, we employ a Navier-Stokes equations solver on the GPU with a multi-layer approach to handling multiple colored paints with support to lighting and paints undulations. Our system accomplishes interactive frame-rates while manipulating tens of distinct colored paints, a requisite to applications like digital games. Results show the effectiveness of our real-time digital marbling system, providing to the artists an intuitive work interface.
SBSEG, 2014
Since the first applications with electronic voting machines in the 90s models and standards have... more Since the first applications with electronic voting machines in the 90s models and standards have been developed but little is discussed what should be the criteria for classification and comparison of such models. This paper proposes a set of basic concepts necessary and their comparison criteria that can be applied in the design and evaluation of digital electoral systems. A table of compliance is also presented for some models in use in several countries in Latin America.
IEEE Engineering in Medicine and Biology Society (EMBC), 2015
In the field of Brain Machine Interfaces (BMI) researchers still are not able to produce clinical... more In the field of Brain Machine Interfaces (BMI) researchers still are not able to produce clinically viable solutions that meet the requirements of long-term operation without the use of wires or batteries. Another problem is neural compatibility with the electrode probes. One of the possible ways of approaching these problems is the use of semiconductor biocompatible materials (silicon carbide) combined with an integrated circuit designed to operate with low power consumption. This paper describes a low-power neural signal amplifier chip, named Cortex, fabricated using 0.18µm CMOS process technology with all electronics integrated in an area of 0.40mm 2. The chip has 4 channels, total power consumption of only 144µW, and is impedance matched to silicon carbide biocompatible electrodes.
ACM SAC, 2015
The use of graph theory for analyzing network-like data has gained central importance with the ri... more The use of graph theory for analyzing network-like data has gained central importance with the rise of the Web 2.0. However, many graph-based techniques are not welldisseminated and neither explored at their full potential, what might depend on a complimentary approach achieved with the combination of multiple techniques. This paper describes the systematic use of graph-based techniques of different types (multimodal) combining the resultant analytical insights around a common domain, the Digital Bibliography & Library Project (DBLP). To do so, we introduce an analytical ensemble based on statistical (degree, and weakly-connected components distribution), topological (average clustering coefficient, and effective diameter evolution), algorithmic (link prediction/machine learning), and algebraic techniques to inspect non-evident features of DBLP at the same time that we interpret the heterogeneous discoveries found along the work. As a result, we have put together a set of techniques demonstrating over DBLP what we call multimodal analysis, an innovative process of information understanding that demands a wide technical knowledge and a deep understanding of the data domain. We expect that our methodology and our findings will foster other multimodal analyses and also that they will bring light over the Computer Science research.
SVR, 2004
This paper presents the reasons for the development of an embedded computer platform to be used a... more This paper presents the reasons for the development of an embedded computer platform to be used as an environment running augmented reality applications based on ARToolKit software. The paper includes the description of the system architecture and performance analysis, considering its potential for educational applications. Resumo. Este artigo apresenta as motivações para o desenvolvimento de um ambiente computacional dedicado para a execução de aplicações de realidade aumentada baseadas no software ARToolKit. A arquitetura do sistema é descrita e são mostrados a análise de desempenho e o potencial de aplicações educacionais.
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Conference Presentations by Mario Gazziro
e educacional que busca fazer um resgate histórico da parte
baixa da vila por meio de reconstrução virtual em um ambiente tridimensional interativo e explorável, reproduzindo em um simulador
computacional as sensações que um passeio real pelo local passaria
ao seu visitante. Contendo a primeira linha férrea que ligava o
litoral à região metropolitana de São Paulo – construída para transportar
produtos de forte impacto econômico na época, como o café
– Paranapiacaba abrigava os operários responsáveis pela manutenção
da estrutura ferroviária, desenvolvida por engenheiros ingleses,
o que de certa forma explica os padrões arquitetônicos encontrados
na vila. Sua importância na história, economia e cultura do Estado
de São Paulo é representada por meio de modelos tridimensionais
fiéis às construções originais, incluindo o relevo da região, e informações
multimídia dispostas de forma interativa pelo cenário.
of the process of electing their representatives. Thus, voting schemes need to be transparent and still guarantee the secrecy of the vote to ensure the integrity of elections. In this article, we propose a voting scheme using homomorphic encryption and commitment schemes. The system holds not only the confidentiality of the voters’ vote but also to allow them to audit the outcome of the election. The experimental results show that the system performs well for elections with small numbers of voters.