PaPaS: A Portable, Lightweight, and Generic Framework for Parallel Parameter Studies

The current landscape of scientific research is widely based on modeling and simulation, typically with complexity in the simulation's flow of execution and parameterization properties. Execution flows are not necessarily straightforward since they may need multiple processing tasks and iterations. Furthermore, parameter and performance studies are common approaches used to characterize a simulation, often requiring traversal of a large parameter space. High-performance computers offer practical resources at the expense of users handling the setup, submission, and management of jobs. This work presents the design of PaPaS, a portable, lightweight, and generic workflow framework for conducting parallel parameter and performance studies. Workflows are defined using parameter files based on keyword-value pairs syntax, thus removing from the user the overhead of creating complex scripts to manage the workflow. A parameter set consists of any combination of environment variables, files, partial file contents, and command line arguments. PaPaS is being developed in Python 3 with support for distributed parallelization using SSH, batch systems, and C++ MPI. The PaPaS framework will run as user processes, and can be used in single/multi-node and multi-tenant computing systems. An example simulation using the BehaviorSpace tool from NetLogo and a matrix multiply using OpenMP are presented as parameter and performance studies, respectively. The results demonstrate that the PaPaS framework offers a simple method for defining and managing parameter studies, while increasing resource utilization.Comment: 8 pages, 6 figures, PEARC '18: Practice and Experience in Advanced Research Computing, July 22--26, 2018, Pittsburgh, PA, US

Abstract fractional linear pseudo-parabolic equations in Banach spaces: well-posedness, regularity, and asymptotic behavior

Producción CientíficaIn this paper we study the well-posedness, regularity, and asymptotic behavior of the solutions \red{to} the \red{abstract} pseudo-parabolic equation $\partial_t^\alpha u(t) = A u(t) + B\partial_t^\beta u(t) + f(t),$ where $A,B$ are closed linear operators in a Banach space, and $\partial_t^\gamma u$ denotes the Caputo or Riemann--Liouville fractional derivative of order \red{$\gamma>0$.

An iterative design method for Coalitional control networks with constraints on the shapley Value

9th World CongressThe International Federation of Automatic ControlCape Town, South Africa. August 24-29In this work, we introduce a new iterative design method for a coalitional control scheme for linear systems recently proposed. In this scheme, the links in the network infrastructure are enabled or disabled depending on their contribution to the overall system performance. As a consequence, the local controllers are divided dynamically into sets or coalitions that cooperate in order to attain their control tasks. The new design method allows the control system designer to include new constraints regarding the game theoretical tools of the control architecture, while optimizing the matrices that define the controller

Estrechez del cuello vesico-uretral en pacientes post-operados de hiperplasia benigna de próstata según tres técnicas quirúrgicas en el Hospital Regional Docente de Trujillo 2010 - 2015

Objetivo: Identificar la menor incidencia de estrechez del cuello vesico-uretral en pacientes post operados por Hiperplasia Benigna de Próstata (HBP) con la técnica; adenomectomía más capsulectomía posterior (CAP) en comparación a las técnicas: Adenomectomía suprapúbica transvesical (AST) y Resección Transuretral de Próstata (RTUP). Materiales y Métodos: Se realizó una investigación observacional, analítica y con diseño de cohortes retrospectiva. La población de estudio fueron 412 pacientes postoperados de HBP; 293 pacientes con la cirugía adenomectomía más capsulectomía posterior, 36 pacientes con la técnica AST y 83 pacientes con una RTUP en el Hospital Regional Docente de Trujillo (HRDT) en el periodo de tiempo 2010 a 2015, que cumplieron con los criterios de selección. Resultados: Al comparar las tres técnicas quirúrgicas se encontró una tasa de incidencia de estrechez vesico-uretral con la técnica Adenomectomía más capsulectomía posterior de 2.4% (RR: 0.47; IC 95% 0.16-1.38), un 5.6% con la técnica AST (RR: 1.9; IC 95% 0.43-8.2) y 4.8% con la RTUP (RR: 1.76; IC 95% 0.55-5.9). No se encontró una diferencia significativa al comparar la estrechez vesico-uretral con las tres técnicas quirúrgicas estudiadas. (p>0.05). Conclusiones: No se encontró una diferencia estadísticamente significativa al comparar la incidencia de estrechez vesico-uretral entre las tres técnicas quirúrgicas. Sin embargo, la adenomectomía más capsulectomía posterior ha mostrado tener una menor incidencia de estrechez vesico-uretral que las técnicas: AST y RTUP al comparar lo reportado por otros investigadores. Además, la adenomectomía más capsulectomía posterior sería un factor protector para la estrechez vesico-uretral.Objetive: To identify the minor incidence of bladder neck stricture in patients with Benign Prostatic Hyperplasia (BPH) submitted to prostatic adenomectomy plus posterior capsulectomy compared to suprapubic prostatectomy and Transuretral Resection of Prostate (TURP). Methods: An analytical, observational, retrospective cohort study was made. The study population included 412 patients with BPH submitted to surgery; 293 to adenomectomy plus posterior capsulectomy of prostate, 35 patients to suprapubic prostatectomy and 83 to TURP in Hospital Regional Docente de Trujillo (HRDT) during the period 2010-2015, that fulfilled selection criteria. Results: By comparing the three surgical technics, the adenomectomy plus posterior capsulectomy showed a 2.4 % of incidence of bladder neck stricture (RR: 0.47; CI 95% 0.16-1.38), the suprapubic prostatectomy showed a 5.6% (RR: 1.9; CI 95% 0.43-8.2) and 4.8% for TURP. (RR: 1.76; CI 95% 0.55-5.9). There was not a significant difference by comparing the bladder neck stricture and the three surgical technics (p>0.05). Conclusions: No significant difference was found by comparing the bladder neck stricture incidence with the three surgical techincs studied. However the adenomectomy plus posterior capsulectomy has shown a minor incidence than the supraprubic adenomectomy and TURP, by comparing with other reports. Additional to this, the adenomectomy plus posterior capsulectomy might be a protector factor for bladder neck stricture.Tesi

Comparacion entre la tecnica de control ponderado y control optimo sobre un convertidor boost

Un problema en el marco de referencia de la electrónica de potencia que involucra varios escenarios prácticos para un convertidor de potencia DC-DC clásico de frecuencia fija sincrónica, se investiga. En este trabajo se propone una comparación de dos leyes de control que se han implementado con éxito, la técnica de control ponderada por la replicator dynamics y un control óptimo singular en términos de estabilidad, desempeño dinámico y robustez paramétrica. Estos cálculos son validados en un convertidor Boost con simulaciones y resultados experimentales para tres condiciones críticas tales como nominal, variaciones de tensión de entrada, y perturbaciones de carga, en un caso de estudio.A power electronics benchmark problem involving several practical scenarios for a fixedfrequency synchronous classical DCDC power converter is investigated. In this paper we propose a comparison of two control laws that have been successfully implemented, the weighted control technique by replicator dynamics and singular optimal control in terms of stability, dynamic performance and parametric robustness. These calculations are validated on a Boost converter with simulations and experimental results for three critical conditions such as nominal, input voltage variations, and load perturbations, in a case study.Ingeniero (a) ElectrónicoPregrad

Alkane-grown Beauveria bassiana produce mycelial pellets displaying peroxisome proliferation, oxidative stress, and cell surface alterations

The entomopathogenic fungus Beauveria bassiana is able to grow on insect cuticle18 hydrocarbons as the sole carbon source, inducing several enzymes involved in alkane19 assimilation and concomitantly increasing virulence against insect hosts. In this study, we20 describe some physiological and molecular processes implicated in growth, nutritional21 stress response, and cellular alterations found in alkane-grown fungi. The fungal cytology22 was investigated using light and transmission electron microscopy (TEM) while the surface23 topography was examined using atomic force microscopy (AFM). Fungal hydrophobicity24 was also measured on the cell surface. Additionally, the expression pattern of several genes25 associated with oxidative stress, peroxisome biogenesis, and hydrophobicity were analysed26 by qPCR. We found a novel type of growth in alkane-cultured B. bassiana similar to27 mycelial pellets described in other alkane-free fungi, which were able to germinate and28 produce viable conidia in media without a carbon source and to be pathogenic against29 larvae of the beetles Tenebrio molitor and Tribolium castaneum. Optical microscopy and30 TEM showed that pellets were formed by hyphae cumulates with high peroxidase activity,31 exhibiting peroxisome proliferation and an apparent surface thickening. Alkane-grown32 conidia appeared to be more hydrophobic and cell surfaces displayed different topography33 than glucose-grown cells, as it was observed by AFM. We also found a significant34 induction in several genes encoding for peroxins, catalases, superoxide dismutases, and35 hydrophobins. These results show that both morphological and metabolic changes are36 triggered in mycelial pellets derived from alkane-grown B. bassiana.Fil: Huarte Bonnet, Carla. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Bioquímicas de La Plata ; ArgentinaFil: Santos Da Paixao, Flavia Regina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Bioquímicas de La Plata ; ArgentinaFil: Ponce, Juan C. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Bioquímicas de La Plata ; ArgentinaFil: Santana, Marianela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Bioquímicas de La Plata ; ArgentinaFil: Prieto, Eduardo Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; ArgentinaFil: Pedrini, Nicolás. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Bioquímicas de La Plata ; Argentin

Estudio del precio de exportacion de celulosa blanqueada de pino radiata Chilena mediante series de tiempo (1990 – 2008)

77 p.En este estudio se presenta un análisis mediante series de tiempo, de los cambios que han experimentado los precios de exportación de celulosa blanqueada de pino radiata chilena en el período 1990 – 2008. La metodología utilizada se basa en la descomposición de la serie de tiempo en los componentes de tendencia, cíclico y estacional. La tendencia fue identificada ajustando una función matemática, el componente cíclico se determinó a través de tasas de variación y el componente estacional se obtuvo mediante el método de las diferencias por promedio móvil. Además, se definió el modelo que establece la asociación que presentan estos componentes. Luego, se realizó una revisión bibliográfica abarcando el período de estudio, para conocer los factores que influyeron en el comportamiento cíclico y estacional de los precios. El análisis mostró que los componentes presentan una asociación aditiva del tipo ; las funciones polinómicas de grado 3 y 5 lograron el mejor ajuste a la tendencia; el índice estacional de precios varía influenciado por factores del hemisferio norte. Finalmente, el componente cíclico depende, principalmente, del estado de la actividad económica presente en los países desarrollados./ SUMMARY: This study presents a time series analysis, of the export prices changes of chilean bleached softwood kraft pulp have experienced between 1990 and 2008. The methodology used is based on time series decomposition into trend, cyclical and seasonal components. The trend was identified by adjusting a mathematical function, the cyclical component was determined by rates of change and the seasonal component was obtained using the moving average difference´s method. Besides, a model establishing the association presented by those components was made. A review of the literature was done covering the period of studies to understand the factors influencing the cyclical and seasonal prices. The analysis showed that the components have an additive association of type ; the polynomials functions of 3 and 5 degree achieved the best adjustment to the trend; the seasonal price index varies according to the influence of Northern hemisphere factors. Finally, the cyclical component depends, primarily, of economic activity status in developed countries

La nueva oleada de la investigación en salud pública: de la evidencia a la política

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Understanding the Strategic Engagement of Partner Organizations in Large Cross-Sector Social Partnerships Implementing Community Sustainability Plans

Sustainability is a grand challenge that diverse communities of interest all over the world are currently focusing on at the local and global level. At the local level, thousands of cities have decided to address their sustainability goals through local cross-sector social partnerships, while at the global scale, governments of the world have agreed on the universal aim of achieving the Sustainable Development Goals (SDGs) by 2030. Cross-sector social partnerships have also been identified by researchers and policy makers as a way to address sustainability challenges, with partner organizations from across sectors playing a key role in the achievement of their sustainability goals. Organizations partnering for sustainability are the focus of this dissertation. Many researchers from diverse disciplines claim that organizations join partnerships for strategic reasons, and that sustainability is a strategic opportunity. Integrated literature on strategy, partnerships and sustainability, however, is sparse, and the strategic engagement of organizations in partnerships has been mostly assessed qualitatively. This dissertation draws on strategic management, cross-sector partnerships and sustainability literature to examine the strategic engagement of organizations partnering across sectors for community sustainability. Building on strategic management literature, this dissertation bases its research on three key variables: strategic goals represented as drivers for organizations to join sustainability partnerships, organizational structural features which reflect how organizations structure to implement the partnership’s collective sustainability strategy, and organizational outcomes as what organizations gain from partnering for sustainability. Drivers and outcomes are studied through the management perspective of resource-based view (RBV), that is complemented with a community capitals approach often used in the public policy literature, and structural features are examined through contingency theory drawing from management literature. The questions this dissertation aims to answer are focused on the strategic engagement of organizations in sustainability partnerships through the understanding of organizational structures, the value organizations assign to drivers and outcomes to assess resources through RBV, the implemented structural features to examine contingency theory, and the strategic relationships among these variables. This research collects data through a survey from 224 organizations partnering in large cross-sector partnerships. Each of these partnerships has an approximate minimum of one hundred partners implementing community sustainability plans; these are found in: Barcelona (Spain), Bristol (UK), Gwangju (South Korea), and Montreal (Canada). The survey reached a response rate of 26% allowing findings to be generalizable, showing good reliability, and with unbiased responses across organizations, partnerships, and types of organizations. Within this data set are responses from 71 businesses on their drivers to partner, structural features for partnering, and partner outcomes, which was complemented with qualitative content analyses to study the relationships between businesses partnering for local sustainability, and the SDGs as a proxy to global sustainability. Findings from this research show that organizations implement structures when partnering for sustainability. However, the findings further reveal that structures do not affect the relationships between goals and desired outcomes, and being highly structured is not imperative for achieving valuable outcomes. Results also show that society-oriented resources such as contributing positively to environmental challenges or collaborating with society are the most valuable drivers and outcomes for organizations; informal structural features are the most implemented for addressing sustainability partnerships (for example implementing plans and policies, or partnering with other organizations); and organizations achieve the goals that drive them to partner. No statistically significant relationships were found between drivers and structures, nor between structures and outcomes. Finally, research on businesses shows a positive relationship between business’ drivers and outcomes and the SDGs, representing an opportunity for businesses to achieve their goals and for business outcomes to contribute to global sustainability. Findings from this dissertation contribute to organizational strategic management, partnerships and sustainability literature by confirming quantitatively that sustainability partnerships are strategic for organizations. This dissertation also contributes to the strategy literature by highlighting the key roles of structures and context in the achievement of strategic goals, presenting a theoretical model that integrates different schools of thought. This research also contributes to the refinement of RBV by highlighting with empirical evidence how valuable societal resources are to organizations, and to contingency theory by confirming that informal structural features are how organizations address uncertain and complex environments such as sustainability. Another contribution from this research is to the partnerships literature by highlighting the power that large cross-sector partnerships have in the achievement of organizational goals. With respect to the business literature, this research also contributes to the understanding of businesses in the context of their engagement in local and global sustainability. From these specific contributions, two main conclusions and theoretical contributions arise. First is the relevance of large cross-sector sustainability partnerships, highlighting the contextual role they play, which together with organizational structures, lead organizations to achieve their strategic goals. And second is the value of societal resources, which can be considered strategic for organizations due to the importance that contributing to society has for organizations, and the way these resources are pursued through organizational engagement in cross-sector partnerships

Estudio del impacto tecnológico en la introducción de sistemas hápticos en rehabilitación de funciones motoras de miembros superiores de pacientes en el Perú

El presente proyecto se propuso la implementación de tecnologías hápticas para la evaluación objetiva de funciones motoras de pacientes hemiparésicos del Servicio de Medicina Física y Rehabilitación del Hospital Nacional Guillermo Almenara Irigoyen; para ello, se desarrollaron dos alternativas de solución: un guante háptico para la evaluación de los movimientos independientes de la mano y los dedos, y un mecanismo cartesiano para la evaluación de la mejora de la coordinación y movimientos del brazo.El presente proyecto se propuso la implementación de tecnologías hápticas para la evaluación objetiva de funciones motoras de pacientes hemiparésicos del Servicio de Medicina Física y Rehabilitación del Hospital Nacional Guillermo Almenara Irigoyen; para ello, se desarrollaron dos alternativas de solución: un guante háptico para la evaluación de los movimientos independientes de la mano y los dedos, y un mecanismo cartesiano para la evaluación de la mejora de la coordinación y movimientos del brazo