A proposal for scheduling and delivery orders under VMI environment

[ENG] Vendor managed inventory (VMI) is a widely applied stock management method in SCM in which the inventory is controlled, planned and managed by the supplier, on behalf of the organization which consumes the product, based on an expected demand and on previously agreed inventory levels. Thus, is the supplier who, according to the customer inventory levels, generates a purchase order defining quantities and delivery dates. As a general rule, when such a stock management system is introduced, the objectives are diverse. One of the most important is to avoid excessive inventory levels in the different elements of the supply chain and the Bullwhip effect caused by demand variability. In addition, it is reasonable to expect a reduction of the administrative costs, due for instance to duplicity of administrative errors in the transmission of information. In the case described in this paper, the company QMC was able to identify the opportunity to improve some specific aspects on its operations management, relating to the products that as “vendor” would manage through VMI

Angular dependence of magnetic properties in Ni nanowire arrays

The angular dependence of the remanence and coercivity of Ni nanowire arrays produced inside the pores of anodic alumina membranes has been studied. By comparing our analytical calculations with our measurements, we conclude that the magnetization reversal in this array is driven by means of the nucleation and propagation of a transverse wall. A simple model based on an adapted Stoner-Wohlfarth model is used to explain the angular dependence of the coercivity

Disruptive and Conventional Technologies for the Support of Logistics Processes: A Literature Review

The supply chain has become a key element of increasing the productivity and competitiveness of companies. To achieve this, it is essential to implement a strategy based on the use of technologies, which depends on knowledge of the scope and impact of logistics technologies. Therefore, this article aims to identify the main technologies supporting logistics management and supply chain processes to establish their functionality, scope, and impacts. For this, conventional technologies and technologies framed by the concept of Industry 4.0 that allow the implementation of Logistics 4.0 in companies are analyzed. As a result of searching databases such as Scopus, Web of Science, and Science Direct, we provide an analysis of 18 technologies focusing on their definition, scope, and the logistics processes involved. This study concludes that technologies in logistics management allow for a reduction in total costs, improve collaboration with suppliers and customers, increase the visibility and traceability of products and information, and support decision-making for all agents in the supply chain, including the final consumer

Silicon-based three-dimensional microstructures for radiation dosimetry in hadrontherapy

In this work, we propose a solid-state-detector for use in radiation microdosimetry. This device improves the performance of existing dosimeters using customized 3D-cylindrical microstructures etched inside silicon. The microdosimeter consists of an array of micro-sensors that have 3D-cylindrical electrodes of 15 μm diameter and a depth of 5 μm within a silicon membrane, resulting in a well-defined micrometric radiation sensitive volume. These microdetectors have been characterized using an 241Am source to assess their performance as radiation detectors in a high-LET environment. This letter demonstrates the capability of this microdetector to be used to measure dose and LET in hadrontherapy centers for treatment plan verification as part of their patient-specific quality control program

Ab initio study of the influence of nanoscale doping inhomogeneities in the phase separated state of La1−x_{1-x}Cax_{x}MnO3_3

The chemical influence in the phase separation phenomenon that occurs in perovskite manganites is discussed by means of ab initio calculations. Supercells have been used to simulate a phase separated state, that occurs at Ca concentrations close to the localized to itinerant crossover. We have first considered a model with two types of magnetic ordering coexisting within the same compound. This is not stable. However, a non-isotropic distribution of chemical dopants is found to be the ground state. This leads to regions in the system with different effective concentrations, that would always accompany the magnetic phase separation at the same nanometric scale, with hole-rich regions being more ferromagnetic in character and hole-poor regions being in the antiferromagnetic region of the phase diagram, as long as the system is close to a phase crossover.Comment: 8 pages, 7 figures, 1 tabl

The PENELOPE Physics Models and Transport Mechanics. Implementation into Geant4

[EN] A translation of the penelope physics subroutines to C++, designed as an extension of the Geant4 toolkit, is presented. The Fortran code system penelope performs Monte Carlo simulation of coupled electron-photon transport in arbitrary materials for a wide energy range, nominally from 50 eV up to 1 GeV. Penelope implements the most reliable interaction models that are currently available, limited only by the required generality of the code. In addition, the transport of electrons and positrons is simulated by means of an elaborate class II scheme in which hard interactions (involving deflection angles or energy transfers larger than pre-defined cutoffs) are simulated from the associated restricted differential cross sections. After a brief description of the interaction models adopted for photons and electrons/positrons, we describe the details of the class-II algorithm used for tracking electrons and positrons. The C++ classes are adapted to the specific code structure of Geant4. They provide a complete description of the interactions and transport mechanics of electrons/positrons and photons in arbitrary materials, which can be activated from the G4ProcessManager to produce simulation results equivalent to those from the original penelope programs. The combined code, named PenG4, benefits from the multi-threading capabilities and advanced geometry and statistical tools of Geant4.Financial support from the Spanish Ministerio de Ciencia, Innovacion y Universidades/Agencia Estatal de Investigacion/European Regional Development Fund, European Union, (projects nos. RTI2018-098117-B-C21 and RTI2018-098117-B-C22) is gratefully aknowledged. The work of VA was supported by the program Ayudas para la contratacion de personal investigador en formacion de caracter predoctoral, programa VALi+d under grant number ACIF/2018/148 from the Conselleria dEducacio of the Generalitat Valenciana and the Fondo Social Europeo (FSE). VG acknowledges partial support from FEDER/MCIyU-AEI under grant FPA2017-84543-P, by the Severo Ochoa Excellence Program under grant SEV-2014-0398 and by Generalitat Valenciana through the project PROMETEO/2019/087.Asai, M.; Cortés-Giraldo, MA.; Giménez-Alventosa, V.; Giménez Gómez, V.; Salvat, F. (2021). The PENELOPE Physics Models and Transport Mechanics. Implementation into Geant4. Frontiers in Physics. 9:1-20. https://doi.org/10.3389/fphy.2021.738735S120

The PENELOPE physics models and transport mechanics. Implementation into Geant4

A translation of the penelope physics subroutines to C++, designed as an extension of the Geant4 toolkit, is presented. The Fortran code system penelope performs Monte Carlo simulation of coupled electron-photon transport in arbitrary materials for a wide energy range, nominally from 50 eV up to 1 GeV. Penelope implements the most reliable interaction models that are currently available, limited only by the required generality of the code. In addition, the transport of electrons and positrons is simulated by means of an elaborate class II scheme in which hard interactions (involving deflection angles or energy transfers larger than pre-defined cutoffs) are simulated from the associated restricted differential cross sections. After a brief description of the interaction models adopted for photons and electrons/positrons, we describe the details of the class-II algorithm used for tracking electrons and positrons. The C++ classes are adapted to the specific code structure of Geant4. They provide a complete description of the interactions and transport mechanics of electrons/positrons and photons in arbitrary materials, which can be activated from the G4ProcessManager to produce simulation results equivalent to those from the original penelope programs. The combined code, named PenG4, benefits from the multi-threading capabilities and advanced geometry and statistical tools of Geant4

Adding plant oils to dairy goat diets: Effect on fatty acid content of milk fat

[ES]: El objetivo del presente trabajo fue investigar el efecto de la adición de aceites vegetales de diferente grado de insaturación a la dieta de cabras lecheras sobre el perfil de ácidos grasos de la grasa láctea. Doce cabras de raza Malagueña fueron asignadas al azar a uno de cuatro tratamientos: dieta basal sin aceite añadido y la misma dieta basal adicionada con 48 g/d de aceite de girasol alto oleico, aceite de girasol normal o aceite de lino. La dieta estuvo compuesta por heno de alfalfa (30%) y un concentrado granulado (70%) en el que se incluyó el aceite correspondiente. Todos los aceites redujeron el contenido de ácidos grasos saturados de cadena media de la grasa láctea (P 0,05). El aceite de girasol normal incrementó el contenido de los ácidos C18:1t10, vaccénico y ruménico y aumentó el valor de la ratio linoleico/α-linolénico (P 0,05). Los resultados obtenidos permiten concluir que la adición de aceite de lino a la dieta de cabras en lactación, en comparación con la de los aceites de girasol alto oleico y normal, modifica el perfil de ácidos grasos de la grasa láctea en un sentido más favorable desde el punto de vista de la salud humana.[EN]: The aim of this study was to investigate the effects of adding differently unsaturated vegetable oils to a dairy goat diet on fatty acid content of milk fat. Twelve Malagueña goats were randomly allocated to one of four treatments: no oil basal diet and the same basal diet supplemented with 48 g/d of high oleic sunflower oil, regular sunflower oil or linseed oil. The basal diet was made of alfalfa hay and a pelleted concentrate (30:70 w/w). The concentrate included the respective oils. Supplemented diets decreased medium chain saturated fatty acid content in milk fat (P 0.05). Regular sunflower oil increased C18:1t10, vaccenic and rumenic acid contents as well as linoleic to α-linolenic acid ratio (P 0.05). It was concluded that compared to high oleic o regular sunflower oils, adding linseed oil in dairy goat diets modifies milk fat fatty acid content more favourably from the point of view of human health.Peer Reviewe

II Taller de Naturalezas Híbridas. Los límites ecológicos de lo urbano

[Resumen] La actividad “II Taller de Naturalezas Híbridas. Los límites ecológicos de lo urbano”, organizada por el Grupo de Innovación Docente ConCiencia Social y dirigida al alumnado de cuarto curso del Grado en Sociología, tuvo como objetivo ahondar en la práctica de formas de aprendizaje activo que permitan abordar fuera del aula problemas complejos, como lo son la gestión de residuos, la contaminación y las repercusiones para la naturaleza que se desprenden del modo de vida en la ciudad. La actividad consistió en visitar lugares estratégicos, emplazados en el ámbito rural y que dan servicio al ámbito urbano, explorando su uso, sus límites y su función de forma colectiva, creando un espacio colaborativo en el que co-producir reflexiones, experiencias, interpretaciones y saberes sobre los límites ecológicos de lo urbano, poniendo especial atención en la construcción social de estos espacios y en la función del mundo académico en su cuestionamiento crítico. Esta reflexión supera la clásica división entre lo urbano y lo natural como dominios separados, situándonos ante realidades híbridas, que retan las divisiones del conocimiento experto entre disciplinas aplicadas.[Abstract] The activity "II Hybrid Nature Workshop. The ecological limits of the urban", organised by the ConCiencia Social Innovation Group and aimed at students in the fourth year of the Degree in Sociology, was focused on practice of forms of active learning that allow complex problems to be tackled outside the classroom, such as waste management, pollution and repercussions for nature that arise from the way of life in the cities. The activity consisted of visiting strategic places located in rural areas that serve the urban environment, exploring their use, limits and function collectively, creating a collaborative space in which to co-produce reflections, experiences, interpretations and knowledge about the ecological limits of the urban, while paying special attention to the social construction of these spaces and the role of the academic world in its critical questioning. This reflection overcomes the classic division between the urban and the natural as separate domains, placing us before hybrid entities that challenge the divisions of expert knowledge between applied disciplines

Effect of forage type in the ovine diet on the nutritional profile of sheep milk cheese fat

[EN] The high nutritional value of sheep milk can be advantageous in the manufacture of cheese, and fat plays an important role in sheep cheese properties. The aim of this study was to investigate the effect of feeding common hay or silage diets used in commercial farms on the nutritional value of sheep cheese fat. We also monitored the effect of cheese ripening period on the fatty acid profile. Cheeses were produced from milk of sheep fed hay and silage diets from 8 farms, on 4 separate occasions (February, May, August, and November) over a 1-yr period. Eighty-four individual fatty acids were determined and identified by gas chromatography. Ripening time (100 and 180 d) significantly reduced moisture, acidity, and water activity of cheeses but did not affect the fatty acid content. However, hay feeding, compared with silage feeding, led to cheeses with 1.5- and 1.3-fold higher contents of vaccenic acid and conjugated linoleic acid, without detrimental changes in saturated and n-3 (omega-3) fatty acid composition. Hay forages could be a low-cost alternative for producing cheese with a fatty acid profile suitable for human health, which is an aspect of great interest to the food industrySIThis work was supported by the Ministerio de Economía y Competitividad (Project AGL2016-75159- C2-2-R; Madrid, Spain) and the Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (Project TA2014-00069-CO2-02; Madrid, Spain). The authors also acknowledge Entrepinares S.A.U. Company (Valladolid, Spain) for the help in the cheese-making trial