Ali Arafat Lemus

Ali Arafat Lemus
Universidad Galileo · Computer Science

Master in Science

About

36
Publications
13,317
Reads
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68
Citations
Citations since 2016
10 Research Items
64 Citations
2016201720182019202020212022051015
2016201720182019202020212022051015
2016201720182019202020212022051015
2016201720182019202020212022051015
Additional affiliations
January 2011 - present
Universidad Galileo
Position
  • Research Director
April 2006 - March 2010
Tohoku University
Position
  • Researcher

Publications

Publications (36)
Conference Paper
Full-text available
Surface electromyography (sEMG) commonly used in upper-limb prostheses requires expensive medical equipment to get accurate results, and even then only a few actions can be classified. We propose an sEMG activated embedded system based on Digital Signal Processing and Machine Learning, to interpret the user intention with the purpose of controlling...
Conference Paper
Full-text available
Abstract — Personal 3D printing and the Internet have enabled the creation of low cost prosthetic arms. There are a few truly inspiring open source projects collaborating globally in order to create and improve prosthetic hand design. Currently these 3D printed hands can only open and close the fingers, lacking much of the basic functionality provi...
Conference Paper
Full-text available
ABSTRACT — Electromyography (EMG) commonly used in bionic hand prostheses require very expensive sensors in order to get accurate results, and even then only a few actions can be classified. In this paper we propose a hybrid EMG activated voice controlled embedded system that uses Digital Signal Processing and Machine Learning in order to interpret...
Conference Paper
Full-text available
Videogames are currently amongst the most popular media among children and young adults. Although initially videogames were viewed as negative, recent studies have shown that they can be used for learning, improving grades, cognitive and non-cognitive skills. In this paper we discuss the ideas behind the design and implementation of the "Cerebrex"...
Conference Paper
Full-text available
MOOCs have received much attention due to their openness, scale, reach and have challenged the roles, structure and models of higher education. Several challenges have emerged, such as retention rates, content delivery, and assessment. Techniques like gamification and its focus on motivational aspects might alleviate the retention problem, while te...
Conference Paper
Full-text available
Numerous assistive devices possess complex ways to operate and interact with the subjects, influencing patients to shed them from their activities of daily living. With the purpose of presenting a better solution to mitigate issues generated by complex or expensive alternatives, a test comparing different user-prosthesis interfaces was elaborated t...
Article
Full-text available
The strict development processes of commercial upper-limb prostheses and the complexity of research projects required for their development makes them expensive for end users, both in terms of acquisition and maintenance. Moreover, many of them possess complex ways to operate and interact with the subjects, influencing patients to not favor these d...
Conference Paper
Full-text available
The strict development processes of commercial upper-limb prosthesis and complexity of research projects makes them expensive for end users, both in terms of acquisition and maintenance. The advent of 3D printers and the internet, allows for distributed open-source research projects that follow new design principles; these take into account simplic...
Poster
Full-text available
This poster is about the implementation of a motion capture system in a telepresence robot. For the motion capture process, the hardware used was the perception neuron of Noitom Ldt. And the open source program MyRobotLab to control the microcontrolers that control the servos. For the robot structure it was used the Inmoov.
Poster
Full-text available
Using videogames as a learning tool is not new and it has been shown to be effective in most cases; however the setting and environment in which these tools are used seems to have a great impact on the results. Using our own serious educational videogame, a study was conducted in a rural (low SES) school where students have limited access to comput...
Poster
Full-text available
Using videogames as a learning tool is not new and it has been shown to be effective in most cases; however the setting and environment in which these tools are used seems to have a great impact on the results. Using our own serious educational videogame, a study was conducted in a rural (low SES) school where students have limited access to comput...
Poster
Full-text available
El siguiente trabajo de investigación se basa en el diseño de una prótesis open-source y de bajo costo. El diseño nuestra prótesis es subactuada debido a que se buscaba reducir el número actuadores para reducir el costo. Los mecanismos integrados en nuestra prótesis tienen mejoras sobre prótesis existentes diseñadas previamente a esta. También cump...
Poster
Full-text available
The use of surface electromyography (sEMG) to control upper-limb prostheses requires expensive medical equipment to get accurate results. Biopotentials acquisition is affected by many factors, substantially by the limb position effect [2]. A hybrid sEMG activated embedded system combined with Inertial Measurement Units (IMU) is proposed in order to...
Poster
Full-text available
Abstract: Cerebrex Ultimate is the improved version of the educational videogame Cerebrex, implementing game design techniques, new graphics, new game mechanics, and availability in two languages. The objective is to improve the engagement with the game and captivate the player with game elements offering a more pleasant game experience. For the s...
Conference Paper
Full-text available
Background: Cerebrex is a serious educational videogame (SEG) targeted at Guatemalan elementary 4th to 6th grade students. Since the targets were mainly of Mayan descent and generally computer illiterate children, care was taken to incorporate Mayan cultural aspects such as imaging, language, rhythms, sounds and problems in a format they could unde...
Conference Paper
Full-text available
Recently there has been a series of technological innovations to improve education. Educational systems have been incorporating progressively those innovations in order to enhance and make more motivating the learning experience. This paper presents the preliminary effects of CEREBREX (Lemus, Ajin & Pinto, 2014), a serious educational videogame. Th...
Conference Paper
Full-text available
Since the emergence of the Internet many new technologies have appeared, among them Social Network sites have gained much popularity recently. The main purpose of a Social Network Site is to allow its users to create, structure, expand and express in cyberspace the links and social relations they have in their everyday lives. This visualization of...
Conference Paper
Full-text available
In 1985, Hopfield and Tank proposed recurrent neural networks with an associated energy function which could solve optimization problems [1]. One can imagine the energy function describing a energy landscape and the dynamics, as the motion of a particle under the influence of forces such as gravity and friction. We propose a neural searching alg...
Thesis
Full-text available
This thesis is organized into 5 chapters. It starts with the Introduction, which includes background and purpose of the thesis. It move on to Chapter 2 called neural networks based on energy functions which provides most of the basic knowledge needed to read the rest of the thesis. Chapter 3 discusses the u= 0 model characteristics which is one of...
Thesis
Full-text available
En el proyecto realizado se implementa una solución para el problema de búsqueda de ruta en un mundo tridimensional, tomando en cuenta la altura de la superficie y la facilidad de paso del lugar. El hecho de encontrar una ruta en un mundo tridimensional, implica a la vez, tener un objetivo, un destino al cual se quiere llegar y la dificultad de enc...

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