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  1. Article ; Online: Frecuencia de sintomatología depresiva y tratamiento en adultos mayores con acceso a servicios de salud.

    Eduardo Guzmán Olea

    Horizonte Sanitario, Vol 19, Iss 3, Pp 365-

    2020  Volume 373

    Abstract: La depresión en adultos mayores y su tratamiento es un importante problema de salud pública global que debe ser atendido urgentemente. Objetivo: determinar la frecuencia de sintomatología depresiva y su tratamiento en personas adultas mayores afiliadas a ...

    Abstract La depresión en adultos mayores y su tratamiento es un importante problema de salud pública global que debe ser atendido urgentemente. Objetivo: determinar la frecuencia de sintomatología depresiva y su tratamiento en personas adultas mayores afiliadas a las instituciones de seguridad social de salud en México. Material y métodos: Estudio descriptivo transversal con 3,114 participantes de 7 estados del país, los cuales fueron evaluados psicológicamente empleando la Escala de Depresión Geriátrica {GDS} de Yesavage, también se analizó su afiliación a seguridad social, funcionalidad (índices Barthel y Lawton) y estado cognoscitivo (Minimental de Folstein). El análisis de la información se realizó empleando el paquete estadístico SPSS (Statistical Package for the Social Sciences) asi como los datos sociodemográficos de los participantes. Resultados: Se observó cobertura en el 88.5% de la población. La prevalencia de depresión es del 27.4% y el 96.8% de ellos no recibe tratamiento, además el 18.9% presenta dependencia funcional, el 16.2% deterioro cognoscitivo y el 7.4% ha sufrido al menos una caída con lesiones. Únicamente el 11.2% del total de enfermos fue diagnosticado en su clínica. Conclusión: La prevalencia de depresión no tratada en adultos mayores con acceso a servicios de salud es altamente significativa, es urgente la generación de protocolos, programas y capacitación de profesionales de salud permitan identificar la patología y atender de manera integral a dicho grupo etario.
    Keywords Medicine ; R
    Language English
    Publishing date 2020-09-01T00:00:00Z
    Publisher Universidad Juárez Autónoma de Tabasco
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  2. Article ; Online: Anomalous Concentration Dependence of Surface Tension and Concentration-Concentration Correlation Functions of Binary Non-Electrolyte Solutions

    Carlo Carbone / Eduardo Guzmán / Ramón G. Rubio

    International Journal of Molecular Sciences, Vol 24, Iss 2276, p

    2023  Volume 2276

    Abstract: The concentration dependence of the surface tension of several binary mixtures of non-electrolytes has been measured at 298.15 K. The mixtures have been chosen since they presented a so-called “W-shape” concentration dependence of the excess constant ... ...

    Abstract The concentration dependence of the surface tension of several binary mixtures of non-electrolytes has been measured at 298.15 K. The mixtures have been chosen since they presented a so-called “W-shape” concentration dependence of the excess constant pressure heat capacity and high values of the concentration-concentration correlation function. This behavior was interpreted in terms of the existence of anomalously high concentration fluctuations that resemble those existing in the proximities of critical points. However, no liquid-liquid phase separation has been found in any of these mixtures over a wide temperature range. In this work, we have extended these studies to the liquid-air interfacial properties. The results show that the concentration dependence of the surface tension shows a plateau and the mixing surface tension presents a “W-shape” behavior. To the best of our knowledge, this is the first time that this behavior is reported. The weak anomalies of the surface tension near a liquid-liquid critical point suggest that the results obtained cannot be considered far-from-critical effects. The usual approach of substituting the activity by the concentration in the Gibbs equation for the relative surface concentration has been found to lead to large errors and the mixtures to have a fuzzy and thick liquid/vapor interface.
    Keywords binary mixtures ; critical point ; fluctuations ; non-electrolytes ; surface tension ; Biology (General) ; QH301-705.5 ; Chemistry ; QD1-999
    Subject code 612
    Language English
    Publishing date 2023-01-01T00:00:00Z
    Publisher MDPI AG
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  3. Article ; Online: Essential Oils and Their Individual Components in Cosmetic Products

    Eduardo Guzmán / Alejandro Lucia

    Cosmetics, Vol 8, Iss 114, p

    2021  Volume 114

    Abstract: The current consumer demands together with the international regulations have pushed the cosmetic industry to seek new active ingredients from natural renewable sources for manufacturing more eco-sustainability and safe products, with botanical extract ... ...

    Abstract The current consumer demands together with the international regulations have pushed the cosmetic industry to seek new active ingredients from natural renewable sources for manufacturing more eco-sustainability and safe products, with botanical extract being an almost unlimited source of these new actives. Essential oils (EOs) emerge as very common natural ingredients in cosmetics and toiletries as a result of both their odorous character for the design and manufacturing of fragrances and perfumes, and the many beneficial properties of their individual components (EOCs), e.g., anti-inflammatory, antimicrobial and antioxidant properties, and, nowadays, the cosmetic industry includes EOs or different mixtures of their individual components (EOCs), either as active ingredients or as preservatives, in various product ranges (e.g., moisturizers, lotions and cleanser in skin care cosmetics; conditioners, masks or antidandruff products in hair care products; lipsticks, or fragrances in perfumery). However, the unique chemical profile of each individual essential oil is associated with different benefits, and hence it is difficult to generalize their potential applications in cosmetics and toiletries, which often require the effort of formulators in seeking suitable mixtures of EOs or EOCs for obtaining specific benefits in the final products. This work presents an updated review of the available literature related to the most recent advances in the application of EOs and EOCs in the manufacturing of cosmetic products. Furthermore, some specific aspects related to the safety of EOs and EOCs in cosmetics will be discussed. It is expected that the information contained in this comprehensive review can be exploited by formulators in the design and optimization of cosmetic formulations containing botanical extracts.
    Keywords cosmetics ; essential oils ; formulations ; fragrances ; hair care ; skin care ; Chemistry ; QD1-999
    Subject code 650
    Language English
    Publishing date 2021-12-01T00:00:00Z
    Publisher MDPI AG
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  4. Article ; Online: The Influence of Collaboration on Enterprises Internationalization Process

    Beatriz Andres / Raul Poler / Eduardo Guzman

    Sustainability, Vol 14, Iss 2843, p

    2022  Volume 2843

    Abstract: At present, competitive globalized environments force enterprises to make more effort to both set up collaborative processes among networked partners and open their borders to the internationalization process. With this participation in ... ...

    Abstract At present, competitive globalized environments force enterprises to make more effort to both set up collaborative processes among networked partners and open their borders to the internationalization process. With this participation in internationalization processes, a set of barriers emerges that enterprises must overcome, particularly SMEs. The internationalization barriers are classified in four main dimensions, namely, strategy, technology, partners and product, which are considered to establish relationships between the internationalization and the collaborative processes. Accordingly, the research objective is to analyse the extent to which collaboration with international partners facilitates the internationalization process. A research survey was held with Spanish manufacturing SMEs to assess the internationalization of operations by establishing collaborative processes in global networks. Two surveys were conducted to analyse collaboration and internationalization concepts, and the influences among them: (i) a first survey, designed to validate the posed hypothesis about the relation between internationalization and setting up collaborative processes; (ii) a second survey, devised to perform a descriptive analysis that identifies less-applied collaborative processes in SMEs by establishing internationalization activities. The study results reveal that collaboration positively influences the internationalization process, and identifies the collaborative processes that are less performed among the partners that internationalize their operations.
    Keywords SMEs ; internationalization ; collaborative processes ; collaborative networks ; Environmental effects of industries and plants ; TD194-195 ; Renewable energy sources ; TJ807-830 ; Environmental sciences ; GE1-350
    Subject code 330
    Language English
    Publishing date 2022-02-01T00:00:00Z
    Publisher MDPI AG
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  5. Article ; Online: Matheuristic Algorithm for Job-Shop Scheduling Problem Using a Disjunctive Mathematical Model

    Eduardo Guzman / Beatriz Andres / Raul Poler

    Computers, Vol 11, Iss 1, p

    2022  Volume 1

    Abstract: This paper focuses on the investigation of a new efficient method for solving machine scheduling and sequencing problems. The complexity of production systems significantly affects companies, especially small- and medium-sized enterprises (SMEs), which ... ...

    Abstract This paper focuses on the investigation of a new efficient method for solving machine scheduling and sequencing problems. The complexity of production systems significantly affects companies, especially small- and medium-sized enterprises (SMEs), which need to reduce costs and, at the same time, become more competitive and increase their productivity by optimizing their production processes to make manufacturing processes more efficient. From a mathematical point of view, most real-world machine scheduling and sequencing problems are classified as NP-hard problems. Different algorithms have been developed to solve scheduling and sequencing problems in the last few decades. Thus, heuristic and metaheuristic techniques are widely used, as are commercial solvers. In this paper, we propose a matheuristic algorithm to optimize the job-shop problem which combines a genetic algorithm with a disjunctive mathematical model, and the Coin-OR Branch & Cut open-source solver is employed. The matheuristic algorithm allows efficient solutions to be found, and cuts computational times by using an open-source solver combined with a genetic algorithm. This provides companies with an easy-to-use tool and does not incur costs associated with expensive commercial software licenses.
    Keywords scheduling ; production planning ; matheuristic ; genetic algorithm ; disjunctive mathematical model ; Electronic computers. Computer science ; QA75.5-76.95
    Language English
    Publishing date 2022-12-01T00:00:00Z
    Publisher MDPI AG
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  6. Article ; Online: Physicochemical Aspects of the Performance of Hair-Conditioning Formulations

    Laura Fernández-Peña / Eduardo Guzmán

    Cosmetics, Vol 7, Iss 26, p

    2020  Volume 26

    Abstract: Most of the currently used products for repairing and conditioning hair rely on the deposition of complex formulations, based on mixtures involving macromolecules and surfactants, onto the surface of hair fibers. This leads to the partial covering of the ...

    Abstract Most of the currently used products for repairing and conditioning hair rely on the deposition of complex formulations, based on mixtures involving macromolecules and surfactants, onto the surface of hair fibers. This leads to the partial covering of the damaged areas appearing in the outermost region of capillary fibers, which enables the decrease of the friction between fibers, improving their manageability and hydration. The optimization of shampoo and conditioner formulations necessitates a careful examination of the different physicochemical parameters related to the conditioning mechanism, e.g., the thickness of the deposits, its water content, topography or frictional properties. This review discusses different physicochemical aspects which impact the understanding of the most fundamental bases of the conditioning process.
    Keywords hair conditioning ; deposition ; physico-chemical tools ; shampoos ; reparation ; surfaces ; Chemistry ; QD1-999
    Subject code 660
    Language English
    Publishing date 2020-04-01T00:00:00Z
    Publisher MDPI AG
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  7. Article ; Online: Editorial

    Anne-Laure Fameau / Eduardo Guzmán / Hernán A. Ritacco / Arnaud Saint-Jalmes

    Frontiers in Soft Matter, Vol

    Liquid foams and emulsions stabilized by bio-based particles

    2023  Volume 3

    Keywords foam ; emulsion ; protein ; particle ; interface ; Chemistry ; QD1-999 ; Medical physics. Medical radiology. Nuclear medicine ; R895-920 ; Polymers and polymer manufacture ; TP1080-1185
    Language English
    Publishing date 2023-04-01T00:00:00Z
    Publisher Frontiers Media S.A.
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  8. Article ; Online: A Novel MILP Model for the Production, Lot Sizing, and Scheduling of Automotive Plastic Components on Parallel Flexible Injection Machines with Setup Common Operators

    Beatriz Andres / Eduardo Guzman / Raul Poler

    Complexity, Vol

    2021  Volume 2021

    Abstract: In this article, a mixed integer linear program (MILP) model is proposed for the production, lot sizing, and scheduling of automotive plastic components to minimize the setup, inventory, stockout, and backorder costs, by taking into account injection ... ...

    Abstract In this article, a mixed integer linear program (MILP) model is proposed for the production, lot sizing, and scheduling of automotive plastic components to minimize the setup, inventory, stockout, and backorder costs, by taking into account injection molds as the main index to schedule on parallel flexible injection machines. The proposed MILP considers the minimum and maximum inventory capacities and penalizes stockout. A relevant characteristic of the modeled problem is the dependence between mold setups to produce plastic components. The lot sizing and scheduling problem solution results in the assignment of molds to machines during a specific time period and in the calculation of the number of components to be produced, which is often called lot size, following a sequence-dependent setup time. Depending on the machine on which the mold is setup, the number of units to be produced will be distinct because machines differ from one another. The stock coverage, defined in demand days, is also included in the MILP to avoid backorders, which is highly penalized in the automotive supply chain. Added to this, the proposed model is extended by considering setup common operators to respond to and fulfill the constraints that appear in automotive plastic enterprises. In this regard, the MILP presented solves a lot-sizing and scheduling problem, emerged in a second-tier supplier of a real automotive supply chain. Finally, this article validates the MILP by performing experiments with different sized instances, including small, medium, and large. The large-sized dataset is characterized by replicating the amount of data used in the real enterprise, which is the object of this study. The goodness of the model is evaluated with the computational time and the deviation of the obtained results as regards to the optimal solution.
    Keywords Electronic computers. Computer science ; QA75.5-76.95
    Subject code 650
    Language English
    Publishing date 2021-01-01T00:00:00Z
    Publisher Hindawi-Wiley
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  9. Article ; Online: Corrigendum to “A Novel MILP Model for the Production, Lot Sizing, and Scheduling of Automotive Plastic Components on Parallel Flexible Injection Machines with Setup Common Operators”

    Beatriz Andres / Eduardo Guzman / Raul Poler

    Complexity, Vol

    2021  Volume 2021

    Keywords Electronic computers. Computer science ; QA75.5-76.95
    Language English
    Publishing date 2021-01-01T00:00:00Z
    Publisher Hindawi-Wiley
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  10. Article ; Online: Analysis and Modeling of Wrinkling in Composite Forming

    Philippe Boisse / Jin Huang / Eduardo Guzman-Maldonado

    Journal of Composites Science, Vol 5, Iss 81, p

    2021  Volume 81

    Abstract: Different approaches for the simulation of wrinkling during forming of textile reinforcements are presented. It is shown that 3D finite element modeling requires the consideration of an additional bending stiffness of the fibers. In shell-type modeling, ... ...

    Abstract Different approaches for the simulation of wrinkling during forming of textile reinforcements are presented. It is shown that 3D finite element modeling requires the consideration of an additional bending stiffness of the fibers. In shell-type modeling, the bending stiffness is important because it conditions the size of the wrinkles. Different methods to take into account the bending stiffness independently of the tensile stiffness are presented. The onset and development of wrinkles during forming is a global problem that concerns all deformation modes. It is shown in examples that the shear locking angle is not sufficient to conclude about the development of wrinkles. This article highlights the two points common to the different cases of wrinkling of continuous fiber textile reinforcements: the quasi-inextensibility of the fibers and the possible slippage between the fibers. It presents and compares different approaches to consider these two aspects. The simulation of the simultaneous forming of multilayered textile reinforcements makes it possible to see the influence of the orientation of different plies which is an important factor with regard to wrinkling.
    Keywords fabrics/textiles ; wrinkling ; multilayer ; forming ; bending ; numerical analysis ; Technology ; T ; Science ; Q
    Subject code 600
    Language English
    Publishing date 2021-03-01T00:00:00Z
    Publisher MDPI AG
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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