Papers by Eduardo Rodríguez Meneses
Proceedings of the International Conference on New Interfaces for Musical Expression, Jun 1, 2020
In this work we test the performance of multiple ESP32microcontrollers used as WiFi sensor interf... more In this work we test the performance of multiple ESP32microcontrollers used as WiFi sensor interfaces in the context of real-time interactive systems. The number of devices from 1 to 13, and individual sending rates from 50 to 2300 messages per second are tested to provide examples of various network load situations that may resemble a performance configuration. The overall end-to-end latency and bandwidth are measured as the basic performance metrics of interest. The results show that a maximum message rate of 2300 Hz is possible on a 2.4 GHz network for a single embedded device and decreases as the number of devices are added. During testing it was possible to have up to 7 devices transmitting at 100 Hz while attaining less than 10 ms latency, but performance degrades with increasing sending rates and number of devices. Performance can also vary significantly from day to day depending on network usage in a crowded environment.
This paper describes two augmented nylon-string guitar projects developed in different institutio... more This paper describes two augmented nylon-string guitar projects developed in different institutions. GuitarAMI uses sensors to modify the classical guitars constraints while GuiaRT uses digital signal processing to create virtual guitarists that interact with the performer in real-time. After a bibliographic review of Augmented Musical Instruments (AMIs) based on guitars, we present the details of the two projects and compare them using an adapted dimensional space representation. Highlighting the complementarity and cross-influences between the projects, we propose avenues for future collaborative work.
Occlusal collapse can be included among the most severe masticatory disorders. It is always a cha... more Occlusal collapse can be included among the most severe masticatory disorders. It is always a challenge for the stomatologist due to its complex patholoogy and difficult treatment. It can be treated following either a multidisciplinary approach involving different professionals such as the periodontist, the orthodontist, the prosthodontist, the implantologist and those devoted to the pathologies of the TMJ, or a more integral process. Due to the circumstances of our patient such as his age, the compelling immediacy of the treatment and the convenience of being treated by just one professional able to solve the problem, we decided that the integral treatment (IT) is preferable whenever all the treatment patterns are taken into account. We deem the Occlusal collapse (OC) as a syndrome, an entity starting as a partial edentulism that induces an occlusal pathology affecting the periodontium and causing destruction and pathologically migrated teeth. It is, more than an entity, the evolut...
Hyperinstruments (HI) is one of the paramount fronts of development in contemporary musical creat... more Hyperinstruments (HI) is one of the paramount fronts of development in contemporary musical creation. The interaction between algorithms and minds has helped a myriad of artists to explore and transcend some frontiers of human sensation, perception and cognition, as well as promoting the distributed interaction and remote cooperation of artists in social networks of multimodal artwork performances. This work presents a study on this subject where sessions of free musical improvisation were performed by a group using HI open-source resources as their gestural control. The perceptual and cognitive implications of this human-machine free improvisation interaction are here presented, described and discussed.
Audio Mostly 2021, 2021
The Input Devices and Music Interaction Laboratory (IDMIL) Digital Audio Workbench (DAWb) is a we... more The Input Devices and Music Interaction Laboratory (IDMIL) Digital Audio Workbench (DAWb) is a web application designed for experimentation with key concepts in digital audio theory with interactive visualizations of each stage of the Analog-to-Digital Conversion (ADC) and Digital-to-Analog Conversion (DAC) processes. By experimenting with the simulation settings, numerous key concepts in digital signal theory can be illustrated, such as aliasing, quantization, critical sampling, anti-aliasing filtering and dithering. The interactive interface allows the simulation to be explored freely; users can modify parameters and examine the resulting signals visually through numerous graphs or listen to the resulting signals. The workbench has been extensively used during the 200-level Introduction to Digital Audio course at McGill University in Fall 2020. CCS CONCEPTS • Applied computing → Interactive learning environments; Mathematics and statistics; Sound and music computing.
Divergência genética em acessos de guandu
Pesquisa Agropecuaria Brasileira, Nov 1, 1994
Foram caracterizados, no ano de 1991, em Petrolina, PE, 54 acessos de guandu, em parcelas unicas,... more Foram caracterizados, no ano de 1991, em Petrolina, PE, 54 acessos de guandu, em parcelas unicas, sem repeticao. Nove caracteres quantitativos de maior importância agronomica foram usados para determinacao da distância genetica e formacao de grupos similares de acessos. As tecnicas empregadas foram: a) o Metodo de Agrupamento de Tocher, adotando a distância euclidiana dos dados originais padronizados como medida de dissimilaridade; e b) a dispersao grafica dos acessos em relacao aos dois primeiros componentes principais. Os acessos graniferos ICPL 6 e ICP 6971, os forrageiros D1 Type, D3 Type e ICP 6970 e misto D2 Type, sao recomendados como progenitores, considerando nao so sua distância genetica, mas tambem seu comportamento agronomico.
Journal of toxicology, 2012
The effect of residual concentrations of organophosphate pesticide chlorpyrifos (Lorsban 4E) on t... more The effect of residual concentrations of organophosphate pesticide chlorpyrifos (Lorsban 4E) on the activity of the acetylcholinesterase enzyme and oxygen : nitrogen ratio in the mussel Aulacomya ater was analyzed. Toxicity tests show a sensitivity to the pesticide in the bivalve estimated at 16 μg L(-1) (LC(50-96 hours)). Concentrations between 0.2 and 1.61 μg L(-1) were able to inhibit significantly the AChE activity, and concentrations between 0.8 and 1.61 μg L(-1) stimulate ammonia excretion and decrease oxygen : ammonia-N (O : N) ratio, with respect to the control group. A. ater proved to be a species sensitive to pesticide exposure and easy to handle in lab conditions. Thus, it is recommended as a bioindicator for use in programs of environmental alertness in the Eastern South Pacific coastal zone.
Proceedings of the second international conference on Human-agent interaction, 2014
This paper introduces MARCO, a hybrid, chess playing agent equipped with a custom-built robotic a... more This paper introduces MARCO, a hybrid, chess playing agent equipped with a custom-built robotic arm and an emotionally expressive, virtual face presented on a small, servo-controlled display. MARCO was built to investigate the hypothesis that hybrid systems capable of displaying emotions make playing chess more personal and enjoyable. In addition, it is our aim to realize emotional contagion between man and machine in that the agent has the power to influence the human player on an emotional level and vice versa. The hardware components consist of eight Dynamixel servos, an Arduino-based control board, a 5.6 inch display, and a DGT chessboard. The software components run concurrently as separate processes. The main components are the virtual agent framework MARC, the WASABI Affect Simulation architecture, and the TSCP chess engine.
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Papers by Eduardo Rodríguez Meneses