Cuenca, Ecuador
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Cando O.A.,University of Azuay | Hidalgo K.R.,University of Azuay | Palacios B.C.,University of Azuay
Proceedings of the 2016 IEEE ANDESCON, ANDESCON 2016 | Year: 2016

Freezing of gait (FOG) is a symptom of advanced Parkinson's disease (PD) that affects the quality of life of these patients. This paper presents a new low-cost stimulus system to support the patient response to FOG episodes by using a vibratory cue. Freezing episodes are automatically detected by using an inertial measurement unit (IMU) placed on the patient's right ankle and a pressure sensor embedded into a shoe insole to reduce false-positive episodes. This data is transmitted using Bluetooth technology to a PC and once a freezing event is detected, a vibratory stimulus is produced on the left sole by triggering a micromotor at 275 Hz, which is embedded into the left shoe insole. The entire system was evaluated over a walking circuit designed to provoke FOG events during acquisition of kinematic data. The average time to perform the complete circuit for PD patient is around 146 seconds (without stimulations) and 96 seconds with vibratory stimulation system; therefore showing that time diminishes by 34%. © 2016 IEEE.


Cueva H.,University of Azuay | Pozo F.,University of Azuay | Iturralde D.,University of Azuay
Proceedings of the 2016 IEEE ANDESCON, ANDESCON 2016 | Year: 2016

This paper discusses the design, development and implementation of an cross-platform program, called ENDS (Easy Network Designer Software), which allows to perform network virtualization and remote configuration of MikroTik equipment basic parameters through a graphical interface. The software was written in Java and it uses a MySQL database where the projects are saved. The program was tested by a relatively complex network, and the results shown were satisfactory. © 2016 IEEE.


Cobos-Cali M.,University of Azuay | Ladera V.,University of Salamanca | Perea M.V.,University of Salamanca | Garcia R.,University of Salamanca
Child Abuse and Neglect | Year: 2017

Studies that deal with child maltreatment have become relevant during these past years. One important aspect to consider is the impact of maltreatment on the cognitive functioning and more precisely on language. Our objective is to analyze the different components in the comprehension and production of language in children victims of domestic abuse in Childreńs Homes. Participants: The sample consists of 104 participants divided in two groups. A group of children who have just been institutionalized due to domestic abuse (VG) (Age: 8 years 2 months with a standard deviation of 1, 5 years) without previous treatment; a group of comparison (CG) made up by children who have not been victim of domestic violence (Age: 8 years 6 months with a standard deviation of 2 years and a month), with similar characteristics of gender, age and schooling. Material: The Child Neuropsychological Assessment by Matute, Rosselli, Ardila and Ostrosky (2007) was applied. This test includes metalinguistic, oral and written comprehension and expression skills. Results: The VG group showed low scores in all components of the analyzed language with exception to the discourse, syllable and non-word dictation compared to the CG children. Conclusions: The alterations of the language observed in these children semantic suggest a lack of consolidation of phonological coding and a low use of code. From our findings an early language evaluation in these children can be of especial interest to apply timely intervention programs with the aim of diminishing the impact caused by domestic violence on school failure which is a frequent trait in these children. © 2017 Elsevier Ltd.


Kern J.,University of Santiago de Chile | Urrea C.,University of Santiago de Chile | Torres H.,University of Azuay
Journal of Electrical Engineering and Technology | Year: 2017

The nonlinear behavior and the high performance requirement are the main problems that appear in the design of manipulator robots and their controllers. For that reason, the simulation, real-time execution and comparison of the performance of controllers applied to a robot with three degrees of freedom are presented. Five controllers are prepared to test the robot's dynamic model: predictive; hyperbolic sine-cosine; sliding mode; hybrid composed of a predictive + hyperbolic sine-cosine controller; and adaptive controller. A redundant robot, a communication and signal conditioning interface, and a simulator are developed by means of the MatLab/Simulink software, which allows analyzing the dynamic performance of the robot and of the designed controllers. The manipulator robot is made to follow a test trajectory which, thanks to the proposed controllers, it can do. The results of the performance of this manipulator and of its controllers, for each of the three joints, are compared by means of RMS indices, considering joint errors according to the imposed trajectory and to the controller used. © The Korean Institute of Electrical Engineers.


Abad K.,University of Cuenca | Perez W.,University of Cuenca | Pablo J.,University of Azuay | Franch X.,Polytechnic University of Catalonia
Proceedings of the ACM Symposium on Applied Computing | Year: 2017

Several notations have been proposed in the last decades to support information system architecting, design and implementation. Although some of them have been widely adopted, their practical application remains cumbersome. Reasons are manifold: ambiguous semantics, confusing graphical representation, lack of safe guidelines, etc. In this paper, we explored the use of the i∗ framework in industry for modeling organizational context. We review the models resulting from 36 industrial collaborations conducted in the last five years, where i∗ has been intensively used by novice modellers, without previous exposure to i∗, acting as junior consultants in the organizations. We identify and categorize the main problems that they faced and as a result, we propose a set of guidelines to improve the adoption and practical application of the framework. Copyright 2017 ACM.


Saravia D.,University of Azuay | Gonzalez V.M.,Autonomus Institute of Technology of Mexico
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) | Year: 2016

The cerebral palsy (CP) is an irreversible disorder that affects the human brain and causes problems with mobility and communication. This paper presents the results of designing, implementing and evaluating an easy-to-use and low-cost equipment that seeks to increase the motivation and effort of the children with cerebral palsy while they do their physical therapies. Through a validation process with the help of patients and physiotherapists, we designed a set of multimedia applications that were evaluated with children with cerebral palsy while doing their therapies. Our emphasis was on providing support for the distension muscle exercises as they are identified as the most painful activities that take place in a physical therapy session. The application was based on a Wiimote control, connected to a personal computer via Bluetooth, as a receptor of the infrared light emitted by a simple control made of an infrared led, an interrupter and a battery. © Springer International Publishing Switzerland 2016.


Carvallo J.P.,University of Azuay | Franch X.,Polytechnic University of Catalonia
Lecture Notes in Business Information Processing | Year: 2012

Modern enterprise engineering (EE) requires deep understanding of organizations and their interaction with their context. Because of this, in early phases of the EE process, enterprise context models are often built and used to reason about organizational needs with respects to actors in their context and vice versa. However, far from simple, this task is usually cumbersome because of knowledge and communication gaps among technical personnel performing EE activities and their administrative counterparts. In this paper, we propose the use of strategic patterns expressed with the i* language aimed to help bridging this gap. Patterns emerged from several industrial applications of our DHARMA method, and synthesize knowledge about common enterprise strategies, e.g. CRM. Patterns have been constructed based on the well-known Porter's model of the 5 market forces and built upon i* strategic dependency models. In this way technical and administrative knowledge and skills are synthesized in a commonly agreeable framework. The use of patterns is illustrated with an industrial example in the telecom field. © 2012 Springer-Verlag.


Latta S.C.,National Aviary United States | Tinoco B.A.,State University of New York at Stony Brook | Astudillo P.X.,University of Azuay | Graham C.H.,State University of New York at Stony Brook
Condor | Year: 2011

The tropical Andes rank first among the world's 25 "hotspots" of biodiversity and endemism yet are threatened and little studied. We contrast population trends in avian diversity in montane cloud forest (bosque altoandino) and similar forest degraded by the planting of introduced tree species (bosque introducido) in the Mazán Reserve, Ecuador. We describe changes in bird diversity and abundance in these habitats over 12 years and evaluate the nature of change within these avian communities. On the basis of 2976 count detections and 419 net captures of 76 species of landbirds, indices of similarity between the habitats were low, with only 47.6% of species occurring in both forest types. From 1994-95 to 2006-07, species richness decreased from 54 to 31 in bosque introducido and from 67 to 30 in bosque altoandino. Capture rates also declined from 56.0 to 28.5 birds per 100 mist-net hr in bosque introducido and from 38.0 to 22.4 birds per 100 mist-net hr in bosque altoandino. We explore various potentially interacting factors that might have caused the observed changes in bird communities, including changes in vegetation within the Mazán Reserve and environmental changes resulting from global warming. But our results also suggest that local and regional changes in habitat outside of the Mazán Reserve were likely responsible for some community changes within the reserve. We argue for increased population monitoring to verify trends and to strengthen the effectiveness of conservation efforts in the Andes. Copyright © The Cooper Ornithological Society 2011.


Bungartz F.,Charles Darwin Foundation AISBL | Bungartz F.,University of Azuay | Dutan-Patino V.L.,Charles Darwin Foundation AISBL | Dutan-Patino V.L.,University of Azuay | Elix J.A.,Australian National University
Lichenologist | Year: 2013

As part of a comprehensive biodiversity inventory of Galapagos lichens, all species in two closely related genera, Cryptothecia and Herpothallon, are reviewed. Both genera are superficially similar, ecorticate, cottony-byssoid crusts and are unusual insofar as their asci do not develop in distinct ascomata, but instead within ascigerous areas or even solitary inside pseudisidia. Species of Herpothallon typically have an I- medulla and are covered in ecorticate pseudisidia; only a single species is known fertile. Cryptothecia is characterized by ascigerous areas with loosely aggregated asci. In some species the asci are isolated, but others have closely aggregated asci embedded in a hyphal matrix with some carbonization, perhaps indicating preliminary stages towards a development of true ascomata. Lirellate ascomata of the enigmatic, monotypic Helminthocarpon leprevostii show similarity with these ascigerous areas, especially of C. darwiniana and C. galapagoana, two species newly described here. Both also have similar asci and ascospores. As previously suggested, Helminthocarpon should thus not be included in Graphidaceae, but it belongs in Arthoniales, possibly in Arthoniaceae or Opegraphaceae. A key to all species and brief descriptions are provided. Two of the three Cryptothecia species and two of the seven Herpothallon species reported here are new to science. All records apart from Herpothallon rubrocinctum are new to Galapagos and Ecuador. Copyright © British Lichen Society 2013.


Rojas C.,CONICET | Duchowicz P.R.,University of Azuay | Tripaldi P.,CONICET | Diez R.P.,CONICET
Chemometrics and Intelligent Laboratory Systems | Year: 2015

A predictive quantitative structure-property relationships (QSPR) is developed for modeling the retention index measured on the OV-101 glass capillary gas chromatography column, in a set of 1208 flavor and fragrance compounds. The 4885 molecular descriptors are calculated using the Dragon software and then are simultaneously analyzed through multivariable linear regression analysis using the replacement method (RM) variable subset selection technique. We proceed in three steps, the first one by considering all descriptor blocks, the second one by excluding conformational descriptors blocks, and the last one by analyzing only 3D-descriptors families. The models are properly validated through an external test set of compounds. Cross-validation methods such as leave-one-out and leave-more-out are applied, together with Y-randomization and applicability domain analysis. The results clearly suggest that 3D-descriptors do not offer relevant information for modeling the retention index, while a topological index such as the solvation connectivity index of first order has a high relevance for this purpose. © 2014 Elsevier B.V.

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