1,159 research outputs found
The space, the device and agriculture: A foucoltean view on the configuration of the agricultural production space in the lra site, Valle de Ambato, Catamarca, Argentina
No full textEl Valle de Ambato se sitúa en el centro-este de la provincia de Catamarca, dentro del Departamento que lleva el mismo nombre. Este valle se encuentra delimitado hacia el oeste por el cordón montañoso denominado Ambato-Manchao (4050 msnm), mientras que hacia el este el límite territorial está dado por la sierra Graciana-Balcozna (1850 msnm). A partir de los trabajos de campo realizados durante el 2013-2014, se observaron un conjunto de estructuras y materiales en superficie (i.e. cerámico y lítico). Este nuevo sitio identificado como La Rinconada (LRA de ahora en adelante), nos invita a plantear que no es posible pensar a este sistema agro-pastoril (que se viene planteando desde el 2010) como un todo homogéneo, sino que es necesario entenderlo con variantes que puedan responder a diversas transformaciones producto de variadas relaciones sociales, políticas, ambientales y/o cronológicas.The Ambato Valley is located in the center-east of the province of Catamarca, within the Department that bears the same name. This valley is bounded to the west by the mountain range called Ambato-Manchao (4050 masl), while to the eastthe territorial limitis given by the Serra Graciana-Balcozna (1850 masl). Based on the field work carried out during 2013-2014, a set of structures and materials on the surface (i.e. ceramic and llithic) were observed. This new site identified as La Rinconada Arriba (LRA from now on), invites us to suggest that it is not possible to think of this agro-pastoral system as a homogenous whole, but that it is necessary to understand it with variants that can respond to various product transformations of varied social, political, environmental and/or chronological relationships.Fil: Rodriguez Oviedo, Melisa Belen. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Antropología de Córdoba. Universidad Nacional de Córdoba. Facultad de Filosofía y Humanidades. Instituto de Antropología de Córdoba; Argentin
A study of monodromy in the computation of multidimensional persistence
No full textThe computation of multidimensional persistent Betti numbers for a sublevel filtration on a suitable topological space equipped with a R^n-valued continuous filtering function can be reduced to the problem of computing persistent Betti numbers for a parameterized family of one-dimensional filtering functions. A notion of continuity for points in persistence diagrams exists over this parameter space excluding a discrete number of so-called singular parameter values. We have identified instances of nontrivial monodromy over loops in nonsingular parameter space. In other words, following cornerpoints of the persistence diagrams along nontrivial loops can result in them switching places. This has an important incidence, e.g., in computer-assisted shape recognition, as we believe that new, improved distances between shape signatures can be defined by considering continuous families of matchings between cornerpoints along paths in nonsingular parameter space. Considering that nonhomotopic paths may yield different matchings will therefore be necessary. In this contribution we will discuss theoretical properties of the monodromy in question and give an example of a filtration in which it can be shown to be nontrivial
Dimension that typify the potential consume of organic foods in the Maule Region, Chile
No full textAdasme-Berrios, C (Adasme-Berrios, Cristian)1; Jara-Rojas, R (Jara-Rojas, Roberto)3; Rodriguez, M (Rodriguez, Marcelo)2; Diaz-Tobar, B (Diaz-Tobar, Belen)1 _____________________________________________1. Univ Catolica Maule, Dpto Ciencias Agr, Fac Ciencias Agr & Forestales, Curico, Chile
2. Univ Catolica Maule, Fac Ciencias Basicas, Talca, Chile
3. Univ Talca, Dpto Econ Agr, Talca, ChileThe growing demand for the consumption of organic foods at worldwide level presents sales increasing by over five thousand million dollars per year. Demands extended to development countries like it is the Chilean case, which exports 90% of its production getting an internal market with low development for this type of products. The research tries to identify the constructs to characterize the potential consumers of organic foods. A survey was applied to 422 consumers to carry out the research in the Maule Region, central Chile (C. I. = 95.5%; e = 3.0%). The Information was analyzed through multivariante technic denominated factor analysis of principal components. The main results of the research reveal the existence of four dimensions or constructs, corresponding to: (1) benefits of the organic agriculture; (2) healthy feeding; (3) lifestyles; (4) attribute of organic foods. These four factors influence in the attitude and purchase intention for the consumers toward the organic foods. In addition being key elements when formulating market strategies for organic products
A comparison of regional classification strategies implemented for the population based approach to modelling atrial fibrillation
No full text(1) Background: in silico models are increasingly relied upon to study the mechanisms of atrial fibrillation. Due to the complexity associated with atrial models, cellular variability is often ignored. Recent studies have shown that cellular variability may have a larger impact on electrophysiological behaviour than previously expected. This paper compares two methods for AF remodelling using regional populations. (2) Methods: using 200,000 action potentials, experimental data was used to calibrate healthy atrial regional populations with two cellular models. AF remodelling was applied by directly adjusting maximum channel conductances. AF remodelling was also applied through adjusting biomarkers. The methods were compared upon replication of experimental data. (3) Results: compared to the percentage method, the biomarker approach resulted in smaller changes. RMP, APD20, APD50, and APD90 were changed in the percentage method by up to 11%, 500%, 50%, and 60%, respectively. In the biomarker approach, RMP, APD20, APD50, and APD90 were changed by up to 4.5%, 132%, 50%, and 35%, respectively. (4) Conclusion: applying AF remodelling through biomarker-based clustering resulted in channel conductance changes that were consistent with experimental data, while maintaining the highly non-linear relationships between channel conductances and biomarkers. Directly changing conductances in the healthy regional populations impacted the non-linear relationships and resulted in non-physiological APD20 and APD50 values
Environmental impact assessment as a complement of life cycle assessment. Case study: upgrading of biogas
No full textThis work presents a comparison between an environmental impact assessment (EIA) and a life cycle assessment (LCA) using a case study: upgrading of biogas. The upgrading of biogas is studied using three solvents: water, physical solvent and amine. The EIA follows the requirements of the legislation of Santa Fe Province (Argentina), and the LCA follows ISO 14040. The LCA results showed that water produces a minor impact in most of the considered categories whereas the high impact in the process with amines is the result of its high energy consumptions. The positive results obtained in the EIA (mainly associated with the cultural and socioeconomic components) make the project feasible and all the negative impacts can be mitigated by preventive and remedial measures. From the strengths and weaknesses of each tool, it is inferred that the EIA is a procedure that can complement the LCA.Fil: Morero, Betzabet del Valle. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Santa Fe. Instituto de Desarrollo Tecnológico Para la Industria Química (i); ArgentinaFil: Rodriguez, María Belen. Universidad Nacional del Litoral. Facultad de Ingeniería y Ciencias Hídricas; ArgentinaFil: Campanella, Enrique Angel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Santa Fe. Instituto de Desarrollo Tecnológico Para la Industria Química (i); Argentina. Universidad Nacional del Litoral. Facultad de Ingeniería y Ciencias Hídricas; Argentin
Managing employer brand attributes to attract potential future leaders
No full textAttracting and retaining professionals with the potential to become leaders is crucial for ensuring the success of companies. The purpose of this study is to contribute to the field of employer branding (EB) by identifying which employer brand attributes are perceived as particularly relevant for attracting talented people. Using three empirical studies, we identify brand attributes that have not been very widely diffused among real companies (versus ideal) but are relevant for attracting young professionals with the potential to become leaders. We also identify which brand attributes already present among real employees allow for attracting talented individuals versus the non-talented ones. The three studies are conducted with a sample of 493, 729 and 1605 recent graduates from Italian universities, respectively. The results indicate that the most idealized brand attributes are related to the future employers' ability to innovate, be committed to social responsibility, be open, be a corporation that values capabilities and knowledge and, finally, be a place offering different career paths. The last three factors in particular have become more important in recent years. The results are discussed with reference to how they contribute to our understanding of EB, brand management and the attraction of future leaders. © 2013 Macmillan Publishers Ltd
Impacts of Cellular Electrophysiological Variability on Conduction Velocity Within Isolated Tissue and Depolarization and Repolarization Across the Whole Atrial Model
No full textImproved understanding of the impact of variability on electrophysiological mechanisms is key to understanding the cause and development of cardiovascular disease. Recent studies suggest cellular variability could have an impact on electrophysiological behavior that homogeneous models are unable to capture. This study investigates the impact of cellular variability on conduction velocity and the depolarization and repolarization phases of the atria. Method: 10 Isolated tissue samples for each atrial region were calibrated for CV and later combined in a detailed anatomical atrial model. Variable models were compared with equivalent homogeneous models. Activation maps and APD maps were used for comparison. Results: In isolated tissue simulations, differences in tissue conductance (Gi) ranged between 5.5% reduction to 5.4% increase as a result of heterogeneity, despite differences in CV being <1%. Activation maps showed no significant differences between regionally homogeneous and heterogeneous atrial models. Repolarization across the atria differed significantly between regionally homogeneous and heterogeneous atrial models. Conclusion: Cellular variability has no significant impact on depolarization but significantly influences atrial repolarization. This could result in increased susceptibility to re-entries and atrial fibrillation
Vacuum impregnation in Merluccius hubbsi hake fillets brining: Effect on mass transfer kinetics, texture and colour
No full textBrining is a preliminary process for the development of many traditional and innovative fish products. We analysed the use of vacuum impregnation (VI) in hake fillets brining (10 g NaCl/100 mL solution, 4 ± 2 °C). VI brining (p1 = 10000 Pa, t1 = 5 min, restoring atmospheric pressure for 25–415 min) was compared with brining at atmospheric pressure (control). VI had a significant effect on mass transfer kinetics, yielding a higher Total Mass Change (ΔM) and salt content, which implied shorter brining times as well as higher product yield. Brined fillets presented lower L*, a* and b* values compared to fresh samples. VI did not affect colour when comparing with control. Likewise, texture varied with brining time, but not due to VI. Principal Component Analysis indicated that unbrined fresh hake and samples brined for 240 min (either VI or control) were different in their ΔM, NaCl content, colour and elasticity. Peleg equation accurately modeled salt and water contents behavior during brining, predicting a 75% processing time reduction by the use of vacuum impregnation.Fil: Tomac, Alejandra. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Departamento de Ingeniería Química. Grupo de Investigación en Preservación y Calidad de Alimentos; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata; ArgentinaFil: Rodriguez Mallo, Sofia. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Departamento de Ingeniería Química. Grupo de Investigación en Preservación y Calidad de Alimentos; ArgentinaFil: Perez, Silvina. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Departamento de Ingeniería Química. Grupo de Investigación en Preservación y Calidad de Alimentos; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata; ArgentinaFil: Garcia Loredo, Analia Belen. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Departamento de Ingeniería Química. Grupo de Investigación en Preservación y Calidad de Alimentos; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata; ArgentinaFil: Yeannes, Maria Isabel. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Departamento de Ingeniería Química. Grupo de Investigación en Preservación y Calidad de Alimentos; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata; Argentin
[Two Women in Front of House]
No full textPhotograph of Maurine Liles and Belen Rodriguez Denecamp standing in front of a house in Wilson County, Texas
“Traveling the Graciana”: Methodological aspects and results of the field work of the LRA site
No full textEn esta nota daremos cuenta de los trabajos realizadas en el sitio La Rinconada Arriba (de ahora en adelante LRA) ubicado en el Valle de Ambato, Catamarca, Argentina. Este sitio fue estudiado con el propósito de profundizar los trabajos realizados en la ladera oriental del valle (sierra de La Graciana). Con el fin de concretar este objetivo se realizaron tareas de campo (prospección y relevamiento) durante los meses de Octubre y Noviembre de 2014. Como resultado de estas actividades se lograron registrar e identificar diversos tipos de estructuras (recintos, corrales y canales), de los cuales se recuperaron materiales cerámicos y líticos en superficie. Esta labor permitió identificar un sector destinado principalmente a prácticas agrícolas, que a priori parecieran romper con la configuración productiva propuesta previamente para el valle. La información obtenida producto de este trabajo permite plantear que LRA estuvo enfocada exclusivamente en la producción agrícola y que constituyó una particularidad dentro del modelo agro-pastoril propuesto para la zona en estudio. De este modo, es posible pensar a este sistema no como un todo no homogéneo, sino con variantes que pueden responder a cuestiones sociales, políticas, ambientales y/o cronológicas.In this note is in the Valley of Ambato, Catamarca, Argentina. This site was studied with the purpose of deepening the works carried out in the eastern slope of the valley (La Graciana mountain range). In order to achieve this objective, fieldwork (survey and survey) is carried out during the months of October and November 2014. As a result of these activities, registrars are registered and they identify different types of structures (enclosures, corrals and canals), which recover ceramic and lithic materials on the surface. This work allowed to identify an agricultural sector mainly to the agricultural methods that a priori would be in agreement with the proposed productive configuration for the
valley. The information obtained from this work suggests that LRA was exclusively focused on agricultural production and that it constituted a particularity within the agro-pastoral model proposed for the area under study. In this way, it is possible to think of this system not as a non-homogeneous whole, but with variants that can respond to social, political, environmental and / or chronological issues.Fil: Rodriguez Oviedo, Melisa Belen. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Antropología de Córdoba. Universidad Nacional de Córdoba. Facultad de Filosofía y Humanidades. Instituto de Antropología de Córdoba; Argentin
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