Ancient Martian Floods in a Plausible Variable Climatic Environment as Revealed from the Sequential Growth of Allan Hills 84001 Carbonate Globules

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A note on the computation of the Frobenius number of a numerical semigroup

In this note we observe that the Frobenius number and therefore the conductor of a numerical semigroup can be obtained from the maximal socle degree of the quotient of the corresponding semigroup algebra by the ideal generated by the biggest generator of the semigroup.Comment: Some typos in the introduction have been correcte

The influence of competitive pressure on manufacturer internal information integration

Research on competitive pressure plays an important part in understanding a firm’s behaviour in its changing environment. This paper provides an empirical contribution to the knowledge of the relationship between competitive pressure and internal information integration in this area by focusing on manufacturer internal information integration. The findings show that the degree of manufacturer internal information can be explained by the competitive strength of the largest firm in the industry. From a management perspective, the results indicate the need to regard the competitive landscape as an additional lever of manufacturer internal information sharing

Diseño y Optimización del tamaño de grano triturado para alimentación avícola para criaderos y suministro de balanceado/Design and Optimization of crushed grain size for poultry feed for hatcheries and supply of balanced

En la investigación se diseñó, modeló y mejoró un molino de martillo económico y accesible aplicando métodos lógicos deductivos, la máquina provee un tamaño de grano ideal, que sirve como alimentación directa para aves, o también se puede utilizar como un componente para balanceado en la producción avícola, acorde a los requerimientos de las distintas pymes ya sea para consumo cárnico, producción de huevos, entre otros. Por esta razón es necesario definir distintos parámetros como el tamaño adecuado del tamiz teniendo una variedad desde los 2mm hasta los 5 mm, cuchillas, selección adecuada del motor dependiendo de la cantidad de horas por día, para esto se realizó un análisis mecánico y dinámico de los distintos elementos de la máquina mediante simulación en el software Solidworks free students, luego de tener el dimensionamiento óptimo bajo parámetros ingenieriles de cada una de las partes de la máquina, se realizó una cotización de los materiales bajo consideración económica en el que fue necesario realizar una correcta selección de los mismo elementos basados en catálogos nacionales para que la maquina sea rentable y accesible a los micro productores así como a los mayoristas, una vez considerado todo el procedimiento se construyó la máquina con un costo final de 355,39 dólares americanos, siendo esta de fácil desmontaje, mantenimiento y aplicación para la sociedad, el cual permite la reducción de costos, tiempos de producción y aumenta la eficiencia en la obtención grano triturado para el consumo el sector avícola. In the research an economical and accessible hammer mill was designed, modeled and improved by applying deductive logical methods, the machine provides an ideal grain size, which serves as direct feed for birds, or it can also be used as a component for balanced in the poultry production, according to the requirements of the different SMEs, whether for meat consumption, egg production, among others. For this reason, it is necessary to define different parameters such as the appropriate size of the sieve having a variety from 2mm to 5 mm, blades, suitable engine selection depending on the number of hours per day, for this a mechanical and dynamic analysis of the different elements of the machine by means of simulation in the software Solidworks free students, after having the optimal dimensioning under engineering parameters of each one of the parts of the machine, a quotation of the materials was made under economic consideration in which it was necessary to carry out a correct selection of the same elements based on national catalogs so that the machine is profitable and accessible to the micro producers as well as to the wholesalers. Once the entire procedure was considered, the machine was built with a final cost of US $ 355.39. being this easy to disassembly, maintenance and application for society, which allows the reduction of costs, production times and increases the efficiency in obtaining crushed grain for consumption in the poultry sector. Palabras clave: diseño, producción avícola, grano, balanceado, molino, grano triturado. Keywords: design, poultry production, grain, balanced, mill, crushed grain

Digital Communication and Its Influence on Consumer Habits During Health Emergencies

Virtual Social Networks, such as Facebook, text messages, and instant messaging, have produced a great flow of real-time data like never seen before. This has turned multitasking into an information management strategy (Campos, 2018, p. 5). Currently, social networks have become a massive economic medium and generated many expectations due to the growth potential they offer. The sample of this study was made up of 213 marketing students of the Polytechnic School of Chimborazo – 110 female and 103 male students from the Coast, Sierra, and Amazon regions. Results show that digital communication informs and influences the decision of a consumer to purchase goods and services. Keywords: digital marketing, consumers, services, social networks. Resumen Las Redes Sociales Virtuales, tales como Facebook, mensajes de texto y mensajería instantánea han producido un gran flujo de datos en tiempo real, como nunca antes se vio. Lo que ha convertido a la multitarea en una estrategia de gestión de la información. (Campos, 2018, pág. 5), en la actualidad las redes sociales se han convertido en un medio económico, oportuno y masivo, y han generado muchas expectativas por el potencial que brindan al desarrollo de las diferentes funciones en una organización. La muestra objeto de estudio la constituyeron 213 estudiantes de la Carrera de Mercadotecnia de la Escuela Superior Politécnica de Chimborazo, 110 educandos del género femenino y 103 del género masculino y pertenecen a las regiones Costa, Sierra y Amazonía. Los resultados obtenidos muestran que la comunicación digital informa e influye en la decisión de compra de bienes y servicios sin que los mismos se encuentren estrechamente relacionados con la satisfacción de sus necesidades elementales. Palabras Clave: marketing digital, consumidores, servicios, redes sociales

Comparative transcriptomics reveals key differences in the response to milk oligosaccharides of infant gut-associated bifidobacteria.

Breast milk enhances the predominance of Bifidobacterium species in the infant gut, probably due to its large concentration of human milk oligosaccharides (HMO). Here we screened infant-gut isolates of Bifidobacterium longum subsp. infantis and Bifidobacterium bifidum using individual HMO, and compared the global transcriptomes of representative isolates on major HMO by RNA-seq. While B. infantis displayed homogeneous HMO-utilization patterns, B. bifidum were more diverse and some strains did not use fucosyllactose (FL) or sialyllactose (SL). Transcriptomes of B. bifidum SC555 and B. infantis ATCC 15697 showed that utilization of pooled HMO is similar to neutral HMO, while transcriptomes for growth on FL were more similar to lactose than HMO in B. bifidum. Genes linked to HMO-utilization were upregulated by neutral HMO and SL, but not by FL in both species. In contrast, FL induced the expression of alternative gene clusters in B. infantis. Results also suggest that B. bifidum SC555 does not utilize fucose or sialic acid from HMO. Surprisingly, expression of orthologous genes differed between both bifidobacteria even when grown on identical substrates. This study highlights two major strategies found in Bifidobacterium species to process HMO, and presents detailed information on the close relationship between HMO and infant-gut bifidobacteria

Eficiencia energética y sostenibilidad en edificios a través de procesos "inteligentes"

The construction industry has recently developed new technologies to tackle the increasing complexity of today’s building facilities and systems. Therefore, the term “Intelligent Building” is becoming more often used to identify constructions that are able to integrate simultaneously coexisting systems and subsystems in a building. In addition we start using the term “Smart Building” implying further steps of system integration and interaction. Analysing this subject in detail, there still actually remains the so-called automation isles, as well as to apply extensively the concept of intelligent processing This communication intends to analyse the state of art of the Intelligent Building concept and how the term “intelligent processing” could be applied in order to search a high-level of energy efficiency and sustainability.En los últimos tiempos el mundo de la edificación ha estado marcado por la incorporación de la tecnología para administrar los procesos que se desarrollan en la complejidad creciente de instalaciones y sistemas de un edificio. En esta línea, cada vez es mas utilizado el término “Edificio Inteligente”, para identificar aquellos que son capaces de integrar todos los sistemas y subsistemas que conviven en el edificio; incluso se han empezado a identificar con el termino “Smart Building”, a aquellos que suponen un paso más en la integración e interacción de sistemas. Analizando esta coyuntura con detenimiento, la realidad es que aún persisten las denominadas islas de automatización y realmente queda por aplicar en toda su extensión el concepto de proceso inteligente. Esta comunicación pretende analizar el estado del arte del concepto de edificios inteligentes y las posibilidades de que aplicando mas eficazmente el sentido de “Proceso Inteligente” se podría alcanzar un elevado nivel de Eficiencia Energética y Sostenibilidad