Instrumento virtual para adquisición de datos, análisis y evaluación de sistemas dinámicos

In this work, a program for signal acquisition and monitoring was carried out, with the purpose of evaluating the behavior of rotating systems. The monitoring program was carried out in the LabVIEW software, in which the behavior of the system is visualized and the different post-processes of the acquired signals are carried out. LabVIEW was chosen because it allows manipulating the obtained data to be used in various post-processes in different programs, which is one of the main advantages that they have over other systems, such as ADRE of Bently Nevada DAIU 208-P, which also , does not allow access to data. The operation of the designed program, its advantages and the secondary programs used for the different post-processes are explained in detail. The experimental platform where the tests were carried out is shown, showing the validations and the correct operation of the program designed in LabVIEW, compared to the monitoring system mentioned above ADRE. Finally, various possibilities are offered to expand the capabilities of this program, these options range from increasing the types of filters used for signals, as well as extracting non-linear characteristics, such as the Largest Lyapunov Exponent (LLE).

Rediseño del prototipo de sistema programable para prevenir el robo de bicicletas en Oaxaca

The objective of this article is to present the second phase of the development of a smart alarm prototype that contributed to the prevention of bicycle theft in Oaxaca City, as a result of a redesign of a previous prototype. In this second phase of the investigation, improvements were made in the autonomy of the alarm, adding a lithium battery to supply the energy of the circuit; thus, the size of the circuit is also decreased by changing some components; on the other hand, a mobile application is developed to complement the alarm functions. In addition, a real-time database manager is added in order to have the location data of the bicycle on real time, it means, when the data are being generated. Finally, the traced of a route is added using the Google Maps application that allows the user to focus in certain zone in order to searching their bicycle. In the second phase, also it was applied the prototyping methodology as in the first phase.

Detección óptica en 3D de un objeto flotante en una superficie marina agitada

In this paper we realize a comparison between two detectors: Matched Subspace Detector (MSD) and Modify Matched Subspace Detector (MMSD) when there is a images secuence (3D detection), where the parameters of sea surface and the parameters of floating object are priori unknown in computer simulation, with help of computer software MATLAB. Both detectors (MSD and MMSD) are based in the General Likelihood Ratio Test (GLRT); this method helps solve detection problems when the sea surface and floating object parameters are unknown. The sea surface is simulated as a Gaussian random process, and the floating object is simulated as a priori unknown deterministic process. The paper considers the dependence of the probability of detection with a fixed probability of false alarm on the difference between the average values of reflections from the sea surface and from a floating object with different ratios of the power of fluctuations of reflections from the object and from the sea Surface.

Hidroxiapatita sintetizada a partir del reciclaje de cascaron de huevo

There are different types of hydroxyapatites (HAp) which is why their uses have extended not only in the area of biomaterials, but in catalysis their possible use begins to be analyzed. Its properties depend on the Ca/P atomic ratio, where the type of synthesis and raw material influence this relationship. For this reason, in this work HA was synthesized from the waste of the egg shell, its structure is made up to 90% CaCO3, phosphorus was impregnated, the material obtained was calcined at 800 °C, varying the time 2, 4 and 6 H. The material obtained was found to have characteristic functional groups of HAp, the Ca/P ratio was obtained byEDS, ranging from 4.8 to 44, indicating that you have HA with many carbonate groups.

Aplicación de ethephon en una población de mezquite (Prosopis spp.) para la extracción de goma en Naica, Chihuahua, México

The objective of the research was to extract gum from the mesquite plant, for this, a plant hormone in concentration of 10%, 10.85, 15%, 20%, 25% was used. It was applied to cuts of trunk and secondary branches of trees. The results indicated that 100% of the treated plants produced gum. The duration of the hormone's effect on gum production was nine weeks. Harvests were made every three weeks. No plant showed signs of damage or deterioration. It was observed that as the tree has a greater perimeter of the stem, it produces a greater amount of gum. It was also observed that the plant hormone apparently did not cause biological damage to the leaves and pods according to visual observation compared to other trees without treatment. The proximal chemical analysis that both mesquite and huizache gums have similarity and even improve the parameters required by the Food and Drug Administration for the use of gum arabic in the food industry. The production and harvest periods are from February to June and from September to December. There is an estimated average production of around 180 gr per tree production season.

Diseño e integración de un sistema modular para producción de hortalizas, peces y aves de corral, autosustentable

Today, Mexico is facing a crisis over scarcity and the consequent rise in commodity prices. This situation is expected to continue, because the area available for cultivation, livestock and fishing is reaching its limit, while the population and its food needs are increasing. The proposed system presents an alternative in the production of food for self-consumption in rural and urban areas, consisting of three levels for fish rearing, poultry and vegetable production, and incorporates technology to control its development. The proposed prototype envisages a structural part that supports three modules. The first module is intended for the rearing of fish with a system of filtration and recirculation of water. The second module is intended for the cultivation of vegetables, with a system for the control of the necessary nutrients of vegetables, and in turn, the wastes of plants serve as food to poultry. The third module is intended for poultry rearing, with a system that concentrates and treats waste, which serve as nutrients for vegetables.

Efecto de la temperatura de bulbo seco y humedad relativa en la sensación térmica percibida en espacios exteriores en clima cálido seco

Conditions of the thermal environment in outdoor spaces determine not only its quality, but also the risk of morbidity from remaining in it. The objective of this research was to estimate the effect of dry bulb temperature and relative humidity on the perceived thermal sensation in outdoor spaces in hot dry climate. The thermal comfort adaptation approach was used with the thermal sensation interval means method, the analysis considered three activity levels for the warm period (with 823 observations) and cold period (with 863 observations), and the adaptation level of subjects based on their thermal sensation. The results indicate that even when the critical effect is due to the dry bulb temperature, the relative humidity has an important effect on the perceived sensation.

Simulación y desarrollo de horno termo solar para el cocimiento de alimentos

This project implements a solar thermal oven for cooking food based on solar radiation to generate heat and transform food for consumption and, with it, have a sustainable proposal for renewable energy with the use of solar energy, an entrance to sustainability according to the sustainability objectives required for our country; The oven prototype establishes economic profitability, since there will be no expense for any type of fuel, allowing a more eco-friendly life with the environment, which will allow us an alternative focused on caring for the planet, the project is a solar thermal oven for cooking food, through the use of solar energy, specifically radiation and heat transfer, which obtains the temperature with a solar thermal system powered by a pump with a high pressure, which will move a thermal fluid through a coil which surrounds the oven from the inside and following the base of a sensor make a recirculation of the same which would avoid the increase in the cost of LP or natural gas and even firewood, which represents money invested for certain sectors of the population. Oven, Solar thermal, C

Evaluación del contenido de ácido carmínico con respecto al sacrificio y secado de Dactylopius coccus Costa en Nopaltepec, Estado de México

Digital images were obtained with the faxitron x-ray equipment in seed of: Pinus douglasiana, Pinus devoniana, Caesalpinia platyloba, Lisyloma divaricatum and Swetenia humilis. The correlation between morphological patterns of structures and the physiological development measured by EP germination analysis (ISTA), determination of pH of the exudate and electrical conductivity was established. The X-ray test turned out to be appropriate to analyze the development of embryos, internal physical damage, integuments damage, embryonic cavity filling, embryo alterations and insect attack. Pinus douglasiana showed correlation (-.88 *) between rudimentary embryos (ER) and normal seedlings (PN) and (.94 *) between embryo severe damage and abnormal seedlings; in Pinus devoniana, (-.75 *) for ER and PN; Caesalpinia platyloba and Lisyloma divaricatum They presented higher percentage of internal fissures and correlation (.89 **) of embryo with severe damage and dead seeds. Swetenia humilis in percentage of rudimentary embryos with dead seeds (.87 *). Regarding the external tonality, the electrical conductivity of the species P. devoniana, P. douglasiana S. humilis and C. platyloba, was higher on average in their seeds of dark testa than those of light tone suggesting a greater degree of deterioration.

Fuente Didáctica de Voltaje Lineal

A voltage source is a very useful and necessary tool in prototype testing of electronics projects, especially when they need to be tested in a controlled and safe environment both for the circuit being tested and for the user who is Operating the voltage source. The following article presents a new innovation of this type of tool, it is a linear voltage source with self-protection system for both the user and the circuit under test, it consists of level detecting circuits placed in each voltage regulator which will notify the user if any type of short circuit occurs during the testing stage of their prototype. The user will be notified by the same voltage source by means of a light that will indicate the status of the test, all this in order to avoid short circuit damage and its serious consequences.