This paper studies the problems of the traditional food industry in Peruvian social programs, and how the Blockchain would serve as a solution that includes the immutable registration of information allowing the tracking of food by each responsible party in the process. It was observed that millions of people become ill or die from eating infected, spoiled, or intoxicated food and that these problems are directly linked to the registration and communication areas of the participants in the supply chain. It was concluded that combining technologies such as the Internet of Things (IoT) and Blockchain is an extremely attractive option for the transparent tracking of food from its production to its sale and consumption; likewise, using smart contracts ensures compliance with all the conditions necessary for its consumption. Finally, it should be mentioned that, by being able to track in seco...

The aim of this study was to determine the effect of three freezing curves on the post-thaw viability of spermatozoa collected from the vas deferens of llamas. Six male llamas with surgical diversion of the vas deferens were used. The samples of the six males were mixed for processing (pools) and diluted with Tris-egg yolk. Cooling was carried out to 5 °C where the dilution was completed (dilutor with glycerol) and was maintained for 30 minutes (equilibrium phase). Samples in 0.25 ml straws were subjected to freezing using a temperature drop rate of -20°C/min until reaching -80°C (TI), -100°C (TII) and -120°C (TIII) in 4, 5 and 6 minutes, respectively, to finally store them in liquid nitrogen. The samples were collected for three months (n=19 pools). Total motility (progressive, circular, oscillatory motility), viability and membrane functionality were determined after collection, i...

In the present investigation, we use the error histogram analysis as a computational tool to define whether the model resulting from a system identification process should continue to be fitted, and the Hampel filter for the elimination of outliers as a tool that also avoids on model over-parameterization. To do this, we use three data sets from a four-cylinder BMW diesel engine, to identify a linear model, and then, with that model, analyze the error and its histogram in a data set (without noise, with noise and with outliers). The analysis of the histogram of the error was found to be a useful tool for detecting white noise and helps to avoid overfitting, in addition to the fact that the Hampel filter allowed detecting and eliminating atypical samples. The software used was MATLAB. © 2020 IEEE.

El problema general del presente trabajo fue describir el endomarketing en Corporación Oriente CSM de la ciudad de Iquitos, año 2019; teniendo como objetivos específicos: Determinar el nivel de motivación de los trabajadores, analizar el trabajo en equipo y proponer estrategias de endomarketing para mejorar el servicio de atención al cliente. El presente trabajo de investigación se realizó durante los meses de enero a marzo del año 2019, la población de estudio fue 104 trabajadores, el estudio es de tipo descriptivo, porque se describen los factores como la motivación y el trabajo en equipo de los trabajadores de la corporación. Los principales resultados nos señalan que se observa baja motivación de los trabajadores, y un bajo nivel de trabajo en equipo por lo tanto se debe aplicar estrategias de endomarketing que podrían mejorar el servicio de atención al cliente en Corp...

Mathematical modelling applied to batch milling (at experimental level), is a very important tool to simulate and predict the granulometric yield of a given treated ore; this means, for a given duration of milling operation, to obtain an estimate of the corresponding granulometric analysis, which can then be tested with real data later on, to verify the estimates. The model involves the selection and fracture functions depending on each mesh size in the ore distribution. This will allow the prediction of effective and reliable results, saving costs and more importantly, time, without the need to perform the milling process for each prediction of batch milling.

El modelo matemático aplicado a molienda batch (a nivel laboratorio), es una herramienta muy importante para llegar a simular y luego predecir el producto granulométrico de cierto mineral tratado; esto es por cada cierto intervalo de tiempo transcurrido de molienda, obtener su respectivo análisis granulométrico reflejado a nivel laboratorio, que luego será corroborado con datos reales y además poder verificar su buena aproximación. El modelo involucra a las funciones selección y fractura quienes son constituidos por los tamaños granulométricos de cada malla en la referida distribución mineral. Consiguiendo de esta manera predecir en forma efectiva y confiable, evitando costo y sobre todo tiempo, sin la necesidad de realizar el proceso de molienda para cada predicción de molienda batch.

Mathematical modelling applied to batch milling (at experimental level), is a very important tool to simulate and predict the granulometric yield of a given treated ore; this means, for a given duration of milling operation, to obtain an estimate of the corresponding granulometric analysis, which can then be tested with real data later on, to verify the estimates. The model involves the selection and fracture functions depending on each mesh size in the ore distribution. This will allow the prediction of effective and reliable results, saving costs and more importantly, time, without the need to perform the milling process for each prediction of batch milling.

The aim of this study was to evaluate the factors that affect the transfer of embryos obtained through simple ovulation in alpacas and transferred to alpacas and llamas. The study was conducted under conditions of the Peruvian Highlands during the reproductive season (December to March). Thirteen donor alpacas (Huacaya = 6, Suri = 7) and 80 recipients (40 alpacas and 40 llamas) with at least 15 postpartum days were selected. The embryo recovery rate in 93 consecutive washes were 88.68% in Huacaya alpacas and 80% in Suri alpacas, and the pregnancy rates were 67.57 and 66.67% in alpacas and llamas, respectively without significant differences in both cases. The variables size and quality of the embryo, location and area of the corpus luteum (CL) in the recipient, species of the recipient (llama, alpaca), donor breed (Huacaya, Suri), body condition score (BCS) of the receptor, depth of the ...

The aim of this study was to evaluate the factors that affect the transfer of embryos obtained through simple ovulation in alpacas and transferred to alpacas and llamas. The study was conducted under conditions of the Peruvian Highlands during the reproductive season (December to March). Thirteen donor alpacas (Huacaya = 6, Suri = 7) and 80 recipients (40 alpacas and 40 llamas) with at least 15 postpartum days were selected. The embryo recovery rate in 93 consecutive washes were 88.68% in Huacaya alpacas and 80% in Suri alpacas, and the pregnancy rates were 67.57 and 66.67% in alpacas and llamas, respectively without significant differences in both cases. The variables size and quality of the embryo, location and area of the corpus luteum (CL) in the recipient, species of the recipient (llama, alpaca), donor breed (Huacaya, Suri), body condition score (BCS) of the receptor, depth of the ...

This study was partially supported by San Marcos University, CONCYTEC, INCAGRO, FINCyT and the CONOPA Research Institute. Special Thanks to J. C. Wheeler for assistance writing the manuscript and to the many Veterinarians and alpaca breeders who collaborated so effectively in collecting the samples reported in this study.

The follicular dynamics was evaluated by ultrasonography in Brown Swiss cattle subjected to a protocol of synchronization of estrus with progestogens in the Peruvian highlands. Three groups of Brown Swiss cattle of nine females each were evaluated. The groups were: lactating cows (<120 and >260 days in milk) and heifers. For synchronization, on day 0 a progesterone-based intravaginal device was applied, and 2 mg estradiol benzoate was injected, on day 8 the device was removed and 0.15 mg cloprostenol and 400 IU eCG were applied, and on day 10 1.05 mg GnRH was applied. Artificial insemination at fixed time was done 12 h after the application of GnRH. The ultrasound evaluation was done on days 8 and 10 to determine the growth rate and maximum diameter of the dominant follicle in the three groups. The follicular growth rate was 2.3 ± 1.5, 2.4 ± 1.8 and 2.3 ± 1.8 mm/day for the grou...

The ovarian follicular dynamics monitored by transrectal (TR) and transvaginal (TV) routes in successive waves was studied in 10 llamas older than 4 years, multiparous, without calves at foot, body condition of 3.0, during a period of 90 days in the reproductive season. The Sonostar SS8® ultrasound equipment was used with a linear transducer for transrectal examination and endocavitary microconvex transducer for transvaginal examination, both with a frequency of 6.5 MHz. The inter-wave interval was 20 ± 4.4 and 22.5 ± 5.3 via TR and VT, respectively; the number of follicles per cohort was 5.21 ± 0.92 and 6.38 ± 1.26 for TR and TV, respectively (p=0.0011); the maximum diameter of follicles was 12.49 ± 3.57 mm for TR and 13.56 ± 3.91 mm for TV; the growth rate was 0.70 ± 0.35 and 0.67 ± 0.32 mm/day for TR and TV, respectively. The regression equation for the ratio of the maximum f...

The follicular dynamics was evaluated by ultrasonography in Brown Swiss cattle subjected to a protocol of synchronization of estrus with progestogens in the Peruvian highlands. Three groups of Brown Swiss cattle of nine females each were evaluated. The groups were: lactating cows (<120 and >260 days in milk) and heifers. For synchronization, on day 0 a progesterone-based intravaginal device was applied, and 2 mg estradiol benzoate was injected, on day 8 the device was removed and 0.15 mg cloprostenol and 400 IU eCG were applied, and on day 10 1.05 mg GnRH was applied. Artificial insemination at fixed time was done 12 h after the application of GnRH. The ultrasound evaluation was done on days 8 and 10 to determine the growth rate and maximum diameter of the dominant follicle in the three groups. The follicular growth rate was 2.3 ± 1.5, 2.4 ± 1.8 and 2.3 ± 1.8 mm/day for the grou...

The ovarian follicular dynamics monitored by transrectal (TR) and transvaginal (TV) routes in successive waves was studied in 10 llamas older than 4 years, multiparous, without calves at foot, body condition of 3.0, during a period of 90 days in the reproductive season. The Sonostar SS8® ultrasound equipment was used with a linear transducer for transrectal examination and endocavitary microconvex transducer for transvaginal examination, both with a frequency of 6.5 MHz. The inter-wave interval was 20 ± 4.4 and 22.5 ± 5.3 via TR and VT, respectively; the number of follicles per cohort was 5.21 ± 0.92 and 6.38 ± 1.26 for TR and TV, respectively (p=0.0011); the maximum diameter of follicles was 12.49 ± 3.57 mm for TR and 13.56 ± 3.91 mm for TV; the growth rate was 0.70 ± 0.35 and 0.67 ± 0.32 mm/day for TR and TV, respectively. The regression equation for the ratio of the maximum f...