Enfoque UTE

pp. 16 - 26

Authors: Manuel Fernando Quiñones, Hever Patricio Pachar Bravo, Javier Martínez-Curipoma, Luis Quiñones , Rommel Torres

The current trend is to connect everything to network to be monitored and controlled remotely through own concept IoT technologies. One of the problems is to connect the devices to a network, using technologies with sufficient coverage and capacity, so this article shows the development of a mobile gateway for IoT applications under the Android platform evaluated in 4G mobile networks. The IoT mobile gateway sends the data collected from sensors by selecting the MQTT and HTTP protocols, to IoT platforms on the Internet. The architecture is composed of temperature, luminosity and pressure sensors that are integrated into a sensor node which function is for data collection, processing and then via Bluetooth is sent to an Android smartphone where an application that performs the mobile gateway function is running, here data network are sent through the 4G LTE network to the IoT platforms of Ubidots and Watson IoT. Subsequently, tests were carried out with various metrics such as latency, energy consumption and connection costs. It concludes that IoT mobile gateway has better performance under MQTT protocol compared to HTTP.

pp. 37 - 47

Authors: Jose Carlos Zapata-Rojas, Alejandro Marcelo Gonzales Vargas , Sheyla Amanda Zevallos-Feria

The research compares the vegetative propagation of Chondracanthus chamissoi, commonly called "Yuyo" in Peru on three different types of substrate, under laboratory controlled conditions. The substrates used for comparison were; TA; clam leaflet, TB; Fruit mesh, CT; cape of propylene and TP; Concholepas concholepas shell. According to the study, there was better survival in TB; determining the formation of (DFS) from 20 to 23 days, according to the results, the vegetative propagation strategy is viable for commercial escalation in the coast of Moquegua, Peru.

pp. 57 - 70

Authors: Stephanie Torres-Silva, Ivan Tapia-Calvopiña, Maria Lorena Goetschel, Edgar Pazmiño-Salazar

Drinking water flavor is influenced by some dissolved substances like Na+, K+, Fe3+, Cu2+, Ca2+, Mg2+, HCO3-, NO3-, Cl-, SO42- and CaCO3. This research was conducted in the Public Metropolitan Water and Sanitation Company or EPMAPS (for its acronym in Spanish) which is in charge of water purification and distribution in Quito. It was taken samples from six different treatment plants during five weeks and the following analysis were made: Sensory analysis executed by a panel of trained judges, who evaluated the acceptance ratio (FRA Test (Flavor Rating Assessment)) and the satisfaction ratio (Hedonic Test), physiochemical parameters determination and dissolved minerals concentration. Later the minerals concentration was correlated with the water’s flavor through a multiple factor analysis with main components analysis. As a result of this correlation, it was evidenced that the dissolved mineral concentration directly influences on the tap water flavor and determined statistically that the best sensory analysis is the Hedonic Test. Only the water from the treatment plant number 2 (PT2) obtained a lower sensorial valuation, whose flavor was described as lightly salted, which is related to its concentration of Ca2+, Mg2+, Na+, K+, HCO3-, CaCO3 y Cl-.

pp. 87 - 100

Authors: Manuel Alberto Susunaga Miranda, Bertha María Estévez-Garrido , Rodrigo Manuel Susunaga-Estévez

This article characterizes the silica sand from the coasts of the municipality of Alvarado, Veracruz, Mexico and compares its properties with the materials used for the Permeable Reactive Barriers and that allow its use as a solution for the remediation of aquifers contaminated with leachate from uncontrolled landfills, by granulometric analysis, determination of humidity and concentration of Silica and Iron, obtaining particles with a diameter of 0.707 mm, relative humidity of 0.52% and concentration of SiO2 and Fe2O3 87.38% and 2.72% respectively, which comparing with reactive materials in use meets the criteria to be used as a Barrier for the Remediation of Aquifers contaminated with leachates.

pp. 116 - 131

Authors: Michael Alvarez González, Vladimir Mederos Pérez , Miguel Ángel Hernández Machado, Rafael Matamoros García

The evaluation, analysis and deformations forecast in the Turbo Generator 5 of the water heater-energy plant of Nuevitas, it was the main objective of this research. For they were carried out it chronologically geodesic surveying to establishment control record distributed in same time period to specific marks along the structure. These data were used in the physical-numeric models, by Finite Elements Method, it allowed evaluate the load-deformation process and floor-structures interaction. After achieving the historical record of stress-strain plane state, forecast deformations was proposing for the support structure by Arima’s models to evaluate in short term the not-alienations permissible future registered systematically in the axes of the mechanical system rotors in the plant.