Modeling the kinematics of multi-axial composite laminates as a stacking of 2D TIF plies

Thermoplastic composites are widely considered in structural parts. In this paper attention is paid to sheet forming of continuous fiber laminates. In the case of unidirectional prepregs, the ply constitutive equation is modeled as a transversally isotropic fluid, that must satisfy both the fiber inextensibility as well as the fluid incompressibility. When the stacking sequence involves plies with different orientations the kinematics of each ply during the laminate deformation varies significantly through the composite thickness. In our former works we considered two different approaches when simulating the squeeze flow induced by the laminate compression, the first based on a penalty formulation and the second one based on the use of Lagrange multipliers. In the present work we propose an alternative approach that consists in modeling each ply involved in the laminate as a transversally isotropic fluid – TIF - that becomes 2D as soon as incompressibility constraint and plane stress assumption are taken into account. Thus, composites laminates can be analyzed as a stacking of 2D TIF models that could eventually interact by using adequate friction laws at the inter-ply interfaces.Peer ReviewedPostprint (published version

DIMENSIONES PARA LA PLANIFICACIÓN GERENCIAL TRANSFORMACIONAL EN LAS ORGANIZACIONES UNIVERSITARIAS

El propósito se centró en interpretar las dimensiones que han de involucrarse en un plan gerencial transformacional para las organizaciones universitarias venezolanas basado en los principios generalmente aceptados en la realidad social, que conlleve a la gestación prospectiva de una nueva forma de abordar la planificación estratégica gerencial. Para ello, se abordó desde el paradigma postpositivista, usando el método hermenéutico, con la técnica deobservación-participante. Se concluye con la incorporación de dimensiones como: el individuo sujeto a la mecánica cuántica dada su hipercomplejidad, y al ambiente, en conciencia del necesario resguardo y mejora del único planeta vivo hasta el momento

ARQUITECTURA DE LA RED VIRTUAL DE APRENDIZAJE PARA EL CICLO BÁSICO (FACES-UC)

La sociedad del siglo XXI demanda una universidad adaptada a la nueva realidad que ofrece el desarrollo de la comunicación basada en la tecnología digital computarizada. En virtud de ello, la investigación tuvo como objetivo el diseñar la red virtual de aprendizaje para facilitadores y estudiantes del Ciclo Básico de la Facultad de Ciencias Económicas y Sociales de la Universidad de Carabobo (FaCES-UC), siendo este uno de los objetivos del proyecto LOCTI titulado Formación, capacitación y fortalecimiento a facilitadores del Ciclo Básico y de las Escuelas de FaCES-UC, en el manejo de entornos virtuales como herramientas de aprendizaje. Metodológicamente, el estudio se ubicó en el paradigma positivista de tipo descriptivo, con una población de 72 profesores, calculándose una muestra de 237 estudiantes, con muestreo aleatorio simple, utilizando la técnica de observación directa y aplicando como instrumento el cuestionario simple con 27 preguntas cerradas y dicotómicas. Los resultados arrojaron que más del 95 por ciento de los estudiantes y más del 37 por ciento de los profesores aportaron al diseño de la red virtual de aprendizaje. Se concluye la arquitectura del sitio Web a través de la clasificación de tres criterios que persiguen brindar a la comunidad tanto interna como externa a la Universidad de Carabobo, un portal que ofrezca y difunda información y servicios del Ciclo Básico de FaCES-UC y de sus diversas Cátedras que lo conforman

Lineamientos estratégicos para la formación de competencias laborales

The research aimed implanting the strategic lines for the training of labor competences of the human talent of the Management of Official Relations of C.A Danaven of agreement with your structure. The research was located in the postpositivist paradigm. The results showed that the needs were orientated by 47.73 percent to know, 18.18 percent to do and 34.09 percent to be. It concludes with the implantation of the strategic lines for training of labor competences to emphasizing those that were designed to try to close the distances that were diagnosed.La investigación tuvo como objetivo implantar los lineamientos estratégicos para la formación de competencias laborales del talento humano de la Gerencia de Relaciones Oficiales de C.A. Danaven de acuerdo a su enfoque estructural. El estudio se ubicó en el paradigma postpositivista, arrojando que las necesidades de formación de competencias estuvieron orientadas en un 47,73 por ciento al Saber conocer, 18,18 por ciento al Saber Hacer y un 34,09 por ciento para el Saber Ser. Se concluye con la implantación de los lineamientos estratégicos para la formación de competencias laborales destacando aquellos que fueron diseñados para intentar cerrar las brechas que se diagnosticaron

COMPONENTES DEL DESARROLLO HUMANO SUSTENTABLE

The present research aimed to propose new components of measurement of sustainable human development based on the historical-theoretical trajectory of development. The research assumes a ontoepistemological posture based on positivism, addressing the technique of the survey and the written questionnaire instrument applied to thirty-one (31) experts in the area of knowledge, whose analysis allowed to conclude that the traditional models to measure the Insufficient to demonstrate the reality of nations. Therefore, the proposal of measurement is derived in seven components: ethical, spiritual and cultural, in addition to those formally established by Munasinghe (1993, 2011) and the UN (2012): economic, social, environmental, institutional , In total, by the selection of one hundred and fifty-five (155) variables, whose index is denominated ISIDEHUS.La presente investigación tuvo como objetivo proponer nuevos componentes de medición del desarrollo humano sustentable basado en la trayectoria histórica-teórica del desarrollo. La investigación asume una postura ontoepistemológica basada en el positivismo, abordando la técnica de la encuesta y el instrumento del cuestionario escrito aplicado a treinta y uno (31) expertos en el área de conocimiento, y cuyo análisis permitió concluir que los modelos tradicionales para medir el desarrollo son insuficientes para demostrar la realidad de las naciones. Por tanto, se deriva la propuesta de la medición en siete componentes: la ética, la espiritual y la cultural, además de los formalmente establecidos por Munasinghe (1993, 2011) y la ONU (2012): económica, social, medioambiental, institucional constituidas, en total, por la selección de ciento cincuenta y cinco (155) variables, cuyo índice se denomina ISIDEHUS

PENSAMIENTO ESTRATÉGICO DE LAS PEQUEÑAS Y MEDIANAS INDUSTRIAS EN LA COMPLEJIDAD ECONÓMICA

The purpose focused on understanding the changes in the strategic thinking of small and medium-sized industries in the auto parts sector in Venezuelan economic complexity. Methodologically, it was based on the interpretive paradigm, concluding that strategic thinking has mainly included: the setting of objectives in relation to the organizational goal, the effort in the development of business activity despite failures of public services; the investment in innovation for the redesign of the structure in: products, processes, and socio-organizational that includes a new organizational mentality, seeking at least the operational maintenance in Venezuelan economic complexityEl propósito se centró en comprender los cambios en el pensamiento estratégico de las pequeñas y medianas industrias del sector autopartes en la complejidad económica venezolana. Metodológicamente, se fundamentó en el paradigma interpretativo, concluyendo que el pensamiento estratégico ha incluido principalmente: la fijación de los objetivos en relación con la meta organizacional, el esfuerzo en el desarrollo de la actividad empresarial a pesar de fallas de servicios públicos; la inversión en innovación para el rediseño de la estructura en: productos, procesos, y socio-organizacional que incluye una nueva mentalidad organizativa, buscando como mínimo, el mantenimiento operativo en la complejidad económica venezolana

A local multiple proper generalized decomposition based on the partition of unity

It is well known that model order reduction techniques that project the solution of the problem at hand onto a low-dimensional subspace present difficulties when this solution lies on a nonlinear manifold. To overcome these difficulties (notably, an undesirable increase in the number of required modes in the solution), several solutions have been suggested. Among them, we can cite the use of nonlinear dimensionality reduction techniques or, alternatively, the employ of linear local reduced order approaches. These last approaches usually present the difficulty of ensuring continuity between these local models. Here, a new method is presented, which ensures this continuity by resorting to the paradigm of the partition of unity while employing proper generalized decompositions at each local patch

Hyperoxemia and excess oxygen use in early acute respiratory distress syndrome : Insights from the LUNG SAFE study

Publisher Copyright: © 2020 The Author(s). Copyright: Copyright 2020 Elsevier B.V., All rights reserved.Background: Concerns exist regarding the prevalence and impact of unnecessary oxygen use in patients with acute respiratory distress syndrome (ARDS). We examined this issue in patients with ARDS enrolled in the Large observational study to UNderstand the Global impact of Severe Acute respiratory FailurE (LUNG SAFE) study. Methods: In this secondary analysis of the LUNG SAFE study, we wished to determine the prevalence and the outcomes associated with hyperoxemia on day 1, sustained hyperoxemia, and excessive oxygen use in patients with early ARDS. Patients who fulfilled criteria of ARDS on day 1 and day 2 of acute hypoxemic respiratory failure were categorized based on the presence of hyperoxemia (PaO2 > 100 mmHg) on day 1, sustained (i.e., present on day 1 and day 2) hyperoxemia, or excessive oxygen use (FIO2 ≥ 0.60 during hyperoxemia). Results: Of 2005 patients that met the inclusion criteria, 131 (6.5%) were hypoxemic (PaO2 < 55 mmHg), 607 (30%) had hyperoxemia on day 1, and 250 (12%) had sustained hyperoxemia. Excess FIO2 use occurred in 400 (66%) out of 607 patients with hyperoxemia. Excess FIO2 use decreased from day 1 to day 2 of ARDS, with most hyperoxemic patients on day 2 receiving relatively low FIO2. Multivariate analyses found no independent relationship between day 1 hyperoxemia, sustained hyperoxemia, or excess FIO2 use and adverse clinical outcomes. Mortality was 42% in patients with excess FIO2 use, compared to 39% in a propensity-matched sample of normoxemic (PaO2 55-100 mmHg) patients (P = 0.47). Conclusions: Hyperoxemia and excess oxygen use are both prevalent in early ARDS but are most often non-sustained. No relationship was found between hyperoxemia or excessive oxygen use and patient outcome in this cohort. Trial registration: LUNG-SAFE is registered with ClinicalTrials.gov, NCT02010073publishersversionPeer reviewe

Omecamtiv mecarbil in chronic heart failure with reduced ejection fraction, GALACTIC‐HF: baseline characteristics and comparison with contemporary clinical trials

Aims: The safety and efficacy of the novel selective cardiac myosin activator, omecamtiv mecarbil, in patients with heart failure with reduced ejection fraction (HFrEF) is tested in the Global Approach to Lowering Adverse Cardiac outcomes Through Improving Contractility in Heart Failure (GALACTIC‐HF) trial. Here we describe the baseline characteristics of participants in GALACTIC‐HF and how these compare with other contemporary trials. Methods and Results: Adults with established HFrEF, New York Heart Association functional class (NYHA) ≥ II, EF ≤35%, elevated natriuretic peptides and either current hospitalization for HF or history of hospitalization/ emergency department visit for HF within a year were randomized to either placebo or omecamtiv mecarbil (pharmacokinetic‐guided dosing: 25, 37.5 or 50 mg bid). 8256 patients [male (79%), non‐white (22%), mean age 65 years] were enrolled with a mean EF 27%, ischemic etiology in 54%, NYHA II 53% and III/IV 47%, and median NT‐proBNP 1971 pg/mL. HF therapies at baseline were among the most effectively employed in contemporary HF trials. GALACTIC‐HF randomized patients representative of recent HF registries and trials with substantial numbers of patients also having characteristics understudied in previous trials including more from North America (n = 1386), enrolled as inpatients (n = 2084), systolic blood pressure &lt; 100 mmHg (n = 1127), estimated glomerular filtration rate &lt; 30 mL/min/1.73 m2 (n = 528), and treated with sacubitril‐valsartan at baseline (n = 1594). Conclusions: GALACTIC‐HF enrolled a well‐treated, high‐risk population from both inpatient and outpatient settings, which will provide a definitive evaluation of the efficacy and safety of this novel therapy, as well as informing its potential future implementation

Remeaning of the learning the language English under the influence of information and communication technologies. Case: University of Carabobo

The globalized word are change the form of teach and learning other languages at par with the trends of introducing to the Information and Communication Technologies (ICT). The research seek interpret the remeaning of the learning of the language English under the influence of the ICT across a project of the Foundation Center of Information and Documentation of University of Carabobo for the creation of virtual environments in the subjects of the Documentaries Analyst. The research was developed under holistic perspective, using the hermeneutics method, with 15 students as key informants. It concludes that, the remeaning of the process of education - learning of the language English, involves that the teacher and the student need to re-learn the thinking process by TICs