On high energy tails in inelastic gases

We study the formation of high energy tails in a one-dimensional kinetic model for granular gases, the so-called Inelastic Maxwell Model. We introduce a time- discretized version of the stochastic process, and show that continuous time implies larger fluctuations of the particles energies. This is due to a statistical relation between the number of inelastic collisions undergone by a particle and its average energy. This feature is responsible for the high energy tails in the model, as shown by computer simulations and by analytical calculations on a linear Lorentz model.Comment: 8 pages, 2 figures, submitted to physica

How new technologies can promote an active and healthy city. Digital platform to identify areas of informal sport practise in the city of Malaga

La investigación realizada se ha llevado a cabo en el marco de la Cátedra Tecnologías Emergentes para la Ciudadanía, Red de Cátedras Estratégicas del Vicerrectorado de Proyectos Estratégicos, Universidad de Málaga, y el Polo Digital, Ayuntamiento de Málaga.In recent years the urban public space has become the largest casual sports infrastructure in cities and suburbs. WHO establishes a direct relationship between the Active Healthy City, social cohesion of communities and public space. This approach provides a framework for research and work on the design of the city and urban space as support for this sport practice. Moreover, new technologies provide an opportunity to promote the sport in the city. “Malaga Activa” digital platform project is an initiative that wants to promote the informal sport practice on the urban public space (outside the regulated sports facilities) and healthy living in the neighborhoods of the city of Malaga. This paper presents the results of the first phase of the project identifying the active sport areas -those in which physical and casual sport activities take place-. It also includes a methodology and a performance test of the created digital platform, as well as an assessment of the experience and possible improvements to be incorporated in the successive phases of the project.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech

An optimised organic carbon ∕ elemental carbon (OC ∕ EC) fraction separation method for radiocarbon source apportionment applied to low-loaded Arctic aerosol filters

Radiocarbon (14C) analysis of carbonaceous aerosols is used for source apportionment, separating the carbon content into fossil vs. non-fossil origin, and is particularly useful when applied to subfractions of total carbon (TC), i.e. elemental carbon (EC), organic carbon (OC), water-soluble OC (WSOC), and water-insoluble OC (WINSOC). However, this requires an unbiased physical separation of these fractions, which is difficult to achieve. Separation of EC from OC using thermal–optical analysis (TOA) can cause EC loss during the OC removal step and form artificial EC from pyrolysis of OC (i.e. so-called charring), both distorting the 14C analysis of EC. Previous work has shown that water extraction reduces charring. Here, we apply a new combination of a WSOC extraction and 14C analysis method with an optimised OC/EC separation that is coupled with a novel approach of thermal-desorption modelling for compensation of EC losses. As water-soluble components promote the formation of pyrolytic carbon, water extraction was used to minimise the charring artefact of EC and the eluate subjected to chemical wet oxidation to CO2 before direct 14C analysis in a gas-accepting accelerator mass spectrometer (AMS). This approach was applied to 13 aerosol filter samples collected at the Arctic Zeppelin Observatory (Svalbard) in 2017 and 2018, covering all seasons, which bear challenges for a simplified 14C source apportionment due to their low loading and the large portion of pyrolysable species. Our approach provided a mean EC yield of 0:87±0:07 and reduced the charring to 6.5% of the recovered EC amounts. The mean fraction modern (F14C) over all seasons was 0.85±0.17 for TC; 0.61±0.17 and 0.66±0.16 for EC bebefore and after correction with the thermal-desorption model, respectively; and 0.81±0.20 for WSOC

Evaluation of Lumped, Semi-Distributed, and Gridded Hydrologic Models at the Farm Scale in the Mississippi Alluvial Valley

Source: ICHE Conference Archive - https://mdi-de.baw.de/icheArchiv

Rauheitsmessung an pharmazeutischen tabletten mittels angularer speckle-korrelation

En este artículo se estudia la calidad del proceso de fabricación pastillas de distinto origen, entre los que se incluyen productos genéricos. El resultado fundamental es que, las marcas oficiales y sus respectivos genéricos, no son iguales desde el punto de vista de su acabado, lo cual repercute directamente en su eficacia.Eine vollsUindige Charakterisierung von pharmazeutischen Tabletten besteht nicht nur in der Analyse der chemischen Zusammensetzung, sondern auch in der Untersuchung der Fertigung der inneren Struktur und der OberfUichenstruktur. Ziel dieser Arbeit ist es, die OberfUichenrauheit von Tabletten an Originalpra• paraten und Generika mittels Angularer Speckle Korre• lation (ASK) zu bestimmen. Die Ergebnisse zeigen un terschiedliche Rauheitswerte bei Tabletten mit gleichem Wirkstoff bei verschiedenen Tragerstoffen. Berührungslose Speckle-Rauheitsmessung konnte eingesetzt werden, um die Regelung des Produktionsprozesses zu verbessern, z. B. wahrend die Tabletten aus Pulver gepresst werden. A complete characterization of pharmaceutical tablets requires not only the analysis of its chemical com• pounds, but also of its inner and surface structure manufacturing. The aim of this work is to determine the sur face roughness of original and generic tablets by means of angular speckle correlation (ASC). The results show different roughness properties between tablets with the same active ingredients, but with different excipients. Contactless speckle roughness measurements could be used to im• prove the control of the production process, e. g., when tablets are pressed from powder

Technological Learning in the Accumulation of Technological Capabilities: A Study of the Automotive Industry in Mexico

This paper will analyze the use of technological learning mechanisms in automotive industry companies located in the central part of Mexico -in the states of Guanajuato, Hidalgo and Queretaro. It will also analyze their impact in the accumulation of technological capabilities. It will explain which mechanisms were used according to the size of these companies. The analysis will conclude that micro-companies face serious limitations in this regard, while medium-size and large companies make better use of the different mechanisms for technological learning which can be seen in the innovation of these businesses

EXPLORING FAMILY-OWNED BUSINESSES IN THE STATE OF HIDALGO, MEXICO

The starting point of this research focuses on a sample of familyowned businesses in the state of Hidalgo, Mexico. We present the preliminary results of the research project entitled "Management of Governance in Family-Owned Business", in which a survey was applied to 167 firms in the state of Hidalgo. The research has a descriptive and exploratory nature and aims to obtain a general assessment of the reality of these companies, in order to get a diagnosis of these firms and provide a set of future research questions. The research took into account various aspects, e.g., a) Form and activity of the company, b) Management of the company, c) Current property, d) Incorporation of the company family, e) Management board, f) Family council, g) Family heritage business assets, h) Succession i) Transfer of ownership of the company, and j) Protocol family. The main findings are the poor presence of governance structures in family business, and the lack of planning for the continuity of such businesses

Recombination rate variation shapes barriers to introgression across butterfly genomes.

Hybridisation and introgression can dramatically alter the relationships among groups of species, leading to phylogenetic discordance across the genome and between populations. Introgression can also erode species differences over time, but selection against introgression at certain loci acts to maintain postmating species barriers. Theory predicts that species barriers made up of many loci throughout the genome should lead to a broad correlation between introgression and recombination rate, which determines the extent to which selection on deleterious foreign alleles will affect neutral alleles at physically linked loci. Here, we describe the variation in genealogical relationships across the genome among three species of Heliconius butterflies: H. melpomene (mel), H. cydno (cyd), and H. timareta (tim), using whole genomes of 92 individuals, and ask whether this variation can be explained by heterogeneous barriers to introgression. We find that species relationships vary predictably at the chromosomal scale. By quantifying recombination rate and admixture proportions, we then show that rates of introgression are predicted by variation in recombination rate. This implies that species barriers are highly polygenic, with selection acting against introgressed alleles across most of the genome. In addition, long chromosomes, which have lower recombination rates, produce stronger barriers on average than short chromosomes. Finally, we find a consistent difference between two species pairs on either side of the Andes, which suggests differences in the architecture of the species barriers. Our findings illustrate how the combined effects of hybridisation, recombination, and natural selection, acting at multitudes of loci over long periods, can dramatically sculpt the phylogenetic relationships among species

Aplicación de gestión de almacén para mejorar la productividad en la empresa Inversiones Romero &CIA S.A.C. San Martin de Porres, 2018

La presente investigación titulada “Aplicación de la gestión de almacén para mejorar la productividad en la empresa Inversiones Romero & Cia. SAC en el distrito de S.M.P.,2018”, tiene como objetivo general, el determinar qué la aplicación de la gestión de almacén, mejora la productividad en el área de almacén de la empresa Inversiones Romero & Cia. SAC en el distrito de S.M.P.,2018. El diseño de la investigación es cuasi-experimental de tipo aplicada, debido a que busca confrontar la parte teórica con la realidad. La población de estudio estuvo conformada por los meses de junio y setiembre del año 2018, analizados antes y después de la implementación del Estudio de Trabajo. La muestra es seleccionada por conveniencia igual a la población. La técnica empleada para la recolección de datos fue la observación, y los instrumentos utilizados fueron los siguientes formatos: hojas de verificación de Toma de Tiempos, formato de cálculo del Número de Muestras, medición del Tiempo Estándar, y la ficha de estimación de Eficiencia, Eficacia y Productividad, así como el cronómetro. Finalmente, en el análisis de datos se utilizó programas como el Microsoft Excel y el SPSS V. 25, de manera descriptiva e inferencial utilizándose tablas y gráficos lineales. Según los datos ingresados al SPSS V. 25, se obtuvo como resultado que la significancia de la prueba de Wilcoxon, aplicada a la productividad Antes y Después es de 0.000, por consiguiente, al ser menor a 0.05, se rechaza la hipótesis nula y se acepta la hipótesis del investigado

Viabilidad para la creación de una panadería en el sector Nor Este de la ciudad de Piura, año 2020

La investigación plantea analiza la viabilidad para la creación de una panadería en el sector nor este de la ciudad de Piura; determinando la demanda potencial, el nivel de oferta, viabilidad técnica, viabilidad legal y organizacional; y finalmente la evaluación económica financiera. la población de la investigación está conformada por 2000 personas y la muestra determinada es de 323. se aplicó como instrumento el cuestionario, utilizando una metodología no experimental, y lineal. dentro de las principales conclusiones se determinó la demanda que para el año 2020 será de 1662, la oferta que para el año 2021 es 608, asimismo, la viabilidad técnica para la creación de una panadería en el sector nor este de la ciudad de Piura y la rentabilidad económica y financiera son positivas