| Records |
| Author |
Arias Alexandra. Ing.; Peña Roxanna. Ing.; Chávez Patricia. MSEE.; Basurto Juan. Ing |
| Title |
Análisis Comparativo de la Implementación de una PBX de Código Abierto instalada en un Servidor Tradicional y en un Enrutador Inalámbrico en términos de Calidad de Servicio en Redes Inalámbricas Amalladas |
Type |
Journal Article |
| Year |
2011 |
Publication |
Revista Tecnologica ESPOL RTE |
Abbreviated Journal |
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Volume  |
Vol. 24 |
Issue |
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Pages |
pp. 1-6 |
| Keywords |
Redes Inalámbricas Mesh, VoIP, Asterisk |
| Abstract |
El presente trabajo compara dos Implementaciones de Centrales Telefónicas VoIP de Código Abierto implementados sobre una Red Inalámbrica Amallada. El primero comprende la instalación de la PBX en un servidor tradicional y el segundo la instalación de una PBX en un enrutador inalámbrico. Nuestro objetivo es
determinar cuál de estos dos sistemas es superior en cuanto a calidad de servicio se refiere. Para determinar la mejor solución, realizamos un estudio técnico de los paquetes capturados durante diferentes pruebas, considerando parámetros como el ancho de banda, retardo y jitter. Nuestros métodos de análisis pueden ser utilizados para futuros trabajos con una mayor complejidad y número de enrutadores inalámbrico, así como establecer el grado de afectación y el comportamiento de las dos PBX cuando haya congestión en la red. |
| Address |
Escuela Superior Politécnica del Litoral Km 30.5 vía Perimetral |
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Guayaquil, Guayas Ecuador |
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Español |
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no |
| Call Number |
cidis @ cidis @ |
Serial |
14 |
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| Author |
Rafael E. Rivadeneira, Angel Domingo Sappa, Vintimilla B. X. and Hammoud R. |
| Title |
A Novel Domain Transfer-Based Approach for Unsupervised Thermal Image Super- Resolution. |
Type |
Journal Article |
| Year |
2022 |
Publication |
Sensors |
Abbreviated Journal |
Sensors |
| Volume |
Vol. 22 |
Issue |
Issue 6 |
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no |
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cidis @ cidis @ |
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170 |
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| Author |
Carlos Monsalve; Alain April and Alain Abran |
| Title |
Measuring software functional size from business process models |
Type |
Journal Article |
| Year |
2011 |
Publication |
International Journal of Software Engineering and Knowledge Engineering |
Abbreviated Journal |
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| Volume |
Vol. 21 |
Issue |
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Pages |
pp. 311–338 |
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| Abstract |
ISO 14143-1 specifies that a functional size measurement (FSM) method must provide measurement procedures to quantify the functional user requirements (FURs) of software. Such quantitative information, functional size, is typically used, for instance, in software estimation. One of the international standards for FSM is the COSMIC FSM method — ISO 19761 — which was designed to be applied both to the business application (BA) software domain and to the real-time software domain. A recurrent problem in FSM is the availability and quality of the inputs required for measurement purposes; that is, well documented FURs. Business process (BP) models, as they are commonly used to gather requirements from the early stages of a project, could be a valuable source of information for FSM. In a previous article, the feasibility of such an approach for the BA domain was analyzed using the Qualigram BP modeling notation. This paper complements that work by: (1) analyzing the use of BPMN for FSM in the BA domain; (2) presenting notation-independent guidelines for the BA domain; and (3) analyzing the possibility of using BP models to perform FSM in the real-time domain. The measurement results obtained from BP models are compared with those of previous FSM case studies. |
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English |
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no |
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cidis @ cidis @ |
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19 |
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| Author |
Suárez P. |
| Title |
Processing and Representation of Multispectral Images Using Deep Learning Techniques |
Type |
Magazine Article |
| Year |
2021 |
Publication |
In Electronic Letters on Computer Vision and Image Analysis |
Abbreviated Journal |
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Vol. 19 |
Issue |
Issue 2 |
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pp. 5-8 |
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Ph.D. Angel Sappa, Director & Ph.D. Boris Vintimilla, Codirector |
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Master's thesis |
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Español |
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yes |
| Call Number |
cidis @ cidis @ |
Serial |
122 |
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| Author |
Morocho-Cayamcela, M.E. |
| Title |
Increasing the Segmentation Accuracy of Aerial Images with Dilated Spatial Pyramid Pooling |
Type |
Journal Article |
| Year |
2020 |
Publication |
Electronic Letters on Computer Vision and Image Analysis (ELCVIA) |
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Vol. 19 |
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Issue 2 |
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pp. 17-21 |
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no |
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cidis @ cidis @ |
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140 |
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| Author |
Xavier Soria; Angel D. Sappa; Riad Hammoud |
| Title |
Wide-Band Color Imagery Restoration for RGB-NIR Single Sensor Image. Sensors 2018 ,2059. |
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Journal Article |
| Year |
2018 |
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Vol. 18 |
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Issue 7 |
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| Abstract |
Multi-spectral RGB-NIR sensors have become ubiquitous in recent years. These sensors allow the visible and near-infrared spectral bands of a given scene to be captured at the same time. With such cameras, the acquired imagery has a compromised RGB color representation due to near-infrared bands (700–1100 nm) cross-talking with the visible bands (400–700 nm). This paper proposes two deep learning-based architectures to recover the full RGB color images, thus removing the NIR information from the visible bands. The proposed approaches directly restore the high-resolution RGB image by means of convolutional neural networks. They are evaluated with several outdoor images; both architectures reach a similar performance when evaluated in different scenarios and using different similarity metrics. Both of them improve the state of the art approaches. |
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no |
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gtsi @ user @ |
Serial |
96 |
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| Author |
Cristhian A. Aguilera; Angel D. Sappa; Ricardo Toledo |
| Title |
Cross-Spectral Local Descriptors via Quadruplet Network |
Type |
Journal Article |
| Year |
2017 |
Publication |
In Sensors Journal |
Abbreviated Journal |
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| Volume |
Vol. 17 |
Issue |
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Pages |
pp. 873 |
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no |
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gtsi @ user @ |
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64 |
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| Author |
Angel D. Sappa; Juan A. Carvajal; Cristhian A. Aguilera; Miguel Oliveira; Dennis G. Romero; Boris X. Vintimilla |
| Title |
Wavelet-Based Visible and Infrared Image Fusion: A Comparative Study |
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Journal Article |
| Year |
2016 |
Publication |
Sensors Journal |
Abbreviated Journal |
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| Volume |
Vol. 16 |
Issue |
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Pages |
pp. 1-15 |
| Keywords |
image fusion; fusion evaluation metrics; visible and infrared imaging; discrete wavelet transform |
| Abstract |
This paper evaluates different wavelet-based cross-spectral image fusion strategies adopted to merge visible and infrared images. The objective is to find the best setup independently of the evaluation metric used to measure the performance. Quantitative performance results are obtained with state of the art approaches together with adaptations proposed in the current work. The options evaluated in the current work result from the combination of different setups in the wavelet image decomposition stage together with different fusion strategies for the final merging stage that generates the resulting representation. Most of the approaches evaluate results according to the application for which they are intended for. Sometimes a human observer is selected to judge the quality of the obtained results. In the current work, quantitative values are considered in order to find correlations between setups and performance of obtained results; these correlations can be used to define a criteria for selecting the best fusion strategy for a given pair of cross-spectral images. The whole procedure is evaluated with a large set of correctly registered visible and infrared image pairs, including both Near InfraRed (NIR) and LongWave InfraRed (LWIR). |
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English |
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no |
| Call Number |
cidis @ cidis @ |
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47 |
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| Author |
Abel Rubio, Wilton Agila, Leandro González & Jonathan Aviles-Cedeno |
| Title |
Distributed Intelligence in Autonomous PEM Fuel Cell Control. |
Type |
Journal Article |
| Year |
2023 |
Publication |
Energies 2023 |
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Vol. 16 |
Issue |
Issue 12 |
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19961073 |
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Approved |
no |
| Call Number |
cidis @ cidis @ |
Serial |
217 |
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| Author |
Ricaurte P; Chilán C; Cristhian A. Aguilera; Boris X. Vintimilla; Angel D. Sappa |
| Title |
Feature Point Descriptors: Infrared and Visible Spectra |
Type |
Journal Article |
| Year |
2014 |
Publication |
Sensors Journal |
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| Volume |
Vol. 14 |
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Pages |
pp. 3690-3701 |
| Keywords |
cross-spectral imaging; feature point descriptors |
| Abstract |
This manuscript evaluates the behavior of classical feature point descriptors when they are used in images from long-wave infrared spectral band and compare them with the results obtained in the visible spectrum. Robustness to changes in rotation, scaling, blur, and additive noise are analyzed using a state of the art framework. Experimental results using a cross-spectral outdoor image data set are presented and conclusions from these experiments are given. |
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English |
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English |
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no |
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cidis @ cidis @ |
Serial |
28 |
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