1,993 research outputs found
Study of the Start-Up Ecosystem in Lima, Peru: Analysis of Interorganizational Networks
According to the literature, In the context of changes at a global level the formation of new businesses drives the economy, being important start-ups, which are linked to a community of entrepreneurs, mentors, incubators, accelerators, providers of common services, angel investors, venture capitalists, universities and public support entities, which together configure an ecosystem that is linked to other ecosystems. In this way, this work focuses on the Lima, Peru ecosystem with the aim of providing an understanding of the interorganizational networks that are established based on the analysis of the interactions that occur in the LinkedIn social network. Definitions, methodology, results and conclusions are presented
Biomedical and Ontological Transformation of Death Into Sickness
This piece seeks to present some origins of the biomedical transformation and
ontological of death -as an ontological determinant- into sickness, a step that will
be possible thanks to the advancements in medicine and biotechnology. From that
exposition, the contributions of Craig Venter, María Blasco, Raymond Kurzweil, and
Nick Bostrom about the control and overcoming of aging, robotic humanizations,
and constant improvement of human life limitations in front of its determinant
possibility (finitude). Those issues were studied from the philosophical platform that
Martin Heidegger expresses in Being and Time, where he understands death as the
most proper, irrespective, and unavoidable possibility the Dasein must face. Finally,
the problem of death with senescence in its current state is articulated. The article
promotes, in conclusion, new propositions to prosecute the characterization of this
biomedical and ontological transformation of death -as an ontological determinantinto
sickness
PRODUCCIÓN ORGÁNICA DE LECHE DE OVEJA
Los sistemas de producción orgánicos se basan en procesos naturales, aprovechamiento de recursos locales y disminución en la degradación del suelo. La efectividad de la producción de leche de los sistemas orgánicos vs los sistemas de producción convenciona les es un tema abierto a debate. Son diversos los estudios en los cuales se observa un efecto positivo de los sistemas orgánicos de producción de leche de oveja en relación al bienestar y salud animal, calidad de los productos e impacto ambiental. No obsta nte, algunos autores citan rendimientos lácteos inferiores, así como mayor susceptibilidad a condiciones medioambientales comparados con los obtenidos en sistemas convencionales. Los menores rendimientos en los sistemas orgánicos de producción de leche de oveja, están relacionados con el limitado aporte nutricional, el bajo potencial genético, así como las cambiantes condiciones medioambientales. Estos sistemas ovinos son principalmente un método de producción para un mercado específico que ofrece productos con calidad Premium y elevados estándares de calidad en sus procesos de producción. Por lo que una empresa ovina orgánica de producción de leche debe ser considerada viable en la medida que presente un balance positivo a nivel de sostenibilidad global, es decir, que sea socialmente benéfica , económicamente viable y medioambientalmente responsable
Reforma del modelo educativo de la universidad nacional de agricultura (UNA) Catacamas, Olancho, Honduras.
El presente trabajo tiene como objetivo estudiar y analizar el proceso de reforma del modelo educativo de la universidad nacional de agricultura. En tal sentido se realizaron entrevistas a diferentes actores tales como docentes, egresados y alumnos para que brindaran su punto de vista del modelo educativo de la UNA, así mismo se efectuaron jornadas de reflexión con expertos en el área educativa para analizar el sistema que posee la universidad en el ámbito educativo, la reforma se apegó al proyecto tunning para latino américa el cual tiene estructurada la metodología que facilita la comprensión de los planes de estudios académicos y su mutua comparación. Desde este escenario, la Universidad Nacional de Agricultura (UNA), con los insumos obtenidos desde diversas fuentes construirá el modelo educativo que se sustenta en concepciones teóricas actuales de la educación universitaria e incorpora los aspectos pertinentes del Plan Estratégico de Desarrollo y las disposiciones legales vigentes y como metodología, utiliza la formación por competencias. El modelo educativo institucional (MEI) para la universidad es la fuerza orientadora de su ser y que hacer universitario y encuentra su fin último en la sociedad
Reforma del modelo educativo de la universidad nacional de agricultura (UNA) Catacamas, Olancho, Honduras
The objective of this paper is to study and analyze the process of reform of the educational model of the National University of Agriculture, UNA-Honduras. In this regard, interviews were conducted with different actors such as teachers, graduates and students to provide their point of view of the educational model of the UNA, likewise there were days of reflection with experts in the educational area to analyze the system that has The university in the educational field, the reform was attached to the tunning project for Latin America which has structured the methodology that facilitates the understanding of academic curricula and their mutual comparison. From this scenario, the National University of Agriculture (UNA-Honduras), with the inputs obtained from various sources will build the educational model that is based on current theoretical concepts of university education and incorporates the relevant aspects of the Strategic Plan of Development and current legal provisions and as a methodology, use training by competencies. The institutional educational model (MEI) for the university is the guiding force of its being and what to do university and finds its ultimate goal in society.El presente trabajo tiene como objetivo estudiar y analizar el proceso de reforma del modelo educativo de la universidad nacional de agricultura. En tal sentido se realizaron entrevistas a diferentes actores tales como docentes, egresados y alumnos para que brindaran su punto de vista del modelo educativo de la UNA, así mismo se efectuaron jornadas de reflexión con expertos en el área educativa para analizar el sistema que posee la universidad en el ámbito educativo, la reforma se apegó al proyecto tunning para latino américa el cual tiene estructurada la metodología que facilita la comprensión de los planes de estudios académicos y su mutua comparación. Desde este escenario, la Universidad Nacional de Agricultura (UNA), con los insumos obtenidos desde diversas fuentes construirá el modelo educativo que se sustenta en concepciones teóricas actuales de la educación universitaria e incorpora los aspectos pertinentes del Plan Estratégico de Desarrollo y las disposiciones legales vigentes y como metodología, utiliza la formación por competencias. El modelo educativo institucional (MEI) para la universidad es la fuerza orientadora de su ser y que hacer universitario y encuentra su fin último en la sociedad
A Multiple System of Radio Sources at the Core of the L723 Multipolar Outflow
We present high angular resolution Very Large Array multi-epoch continuum
observations at 3.6 cm and 7 mm towards the core of the L723 multipolar outflow
revealing a multiple system of four radio sources suspected to be YSOs in a
region of only ~4 arcsecs (1200 AU) in extent. The 3.6 cm observations show
that the previously detected source VLA 2 contains a close (separation ~0.29
arcsecs or ~90 AU) radio binary, with components (A and B) along a position
angle of ~150 degrees. The northern component (VLA 2A) of this binary system is
also detected in the 7 mm observations, with a positive spectral index between
3.6 cm and 7 mm. In addition, the source VLA 2A is associated with extended
emission along a position angle of ~115 degrees, that we interpret as
outflowing shock-ionized gas that is exciting a system of HH objects with the
same position angle. A third, weak 3.6 cm source, VLA 2C, that is detected also
at 7 mm, is located ~0.7 arcsecs northeast of VLA 2A, and is possibly
associated with the water maser emission in the region. The 7 mm observations
reveal the presence of an additional source, VLA 2D, located ~3.5 arcsecs
southeast of VLA 2A, and with a 1.35 mm counterpart. All these radio continuum
sources have a positive spectral index, compatible with them being YSOs. We
also propose that the high velocity CO emission observed in the region could be
the superposition of multiple outflows (at least three independent bipolar
outflows) excited by the YSOs located at the core, instead of the previous
interpretations in terms of only one or two outflows.Comment: Accepted for publication in The Astrophysical Journal (2007 December
6
Electrochemical Impedance Spectroscopy (EIS): A Review Study of Basic Aspects of the Corrosion Mechanism Applied to Steels
AC impedance measurements have been applied for over twenty years in electrochemistry and physics to investigate the electrical properties of conductive materials and their interfaces using an external electrical impulse (VOLTAGE, V or CURRENT, I) as driving force. Furthermore, its application has recently appeared to be destined in the Biotechnology field as an effective tool for rapid microbiologic diagnosis of living organism in situ. However, there is no doubt that the electrochemical impedance spectroscopy (EIS) is still one of the most useful techniques around the world for metal corrosion control and its monitoring. Corrosion has long been recognized as one of the most expensive stumbling blocks that concern many industries and government agencies, because it is a steel destructive phenomenon that occurs due to the chemical interaction with aqueous environments and takes place at the interface between metal and electrolyte producing an electrical charge transfer or ion diffusion process. Consequently, it is experimentally possible to determine through the EIS technique the mechanism and control that kinectics of corrosion reactions encounter. First, EIS data is collected through a potentiostat/
galvanostat apparatus. After, it is fitted to a mathematical model (i.e. an equivalent electrical circuit, EEC) for its interpretation and analysis, fundamentally seeking a meaningful physical interpretation. Finally, this review reports some basic aspects of the corrosion mechanism applied to steels through the experimental EIS response using Nyquist or Bode plots. Examples are given for different applied electrochemical impedance cases in which steel is under study intentionally exposed to a corrosive
aqueous solution by applying a sinusoidal potential at various test conditions
Flood Hazard Assessment Supported by Reduced Cost Aerial Precision Photogrammetry
1566 p.Increasing flood hazards worldwide due to the intensification of hydrological events and
the development of adaptation-mitigation strategies are key challenges that society must address. To minimize flood damages, one of the crucial factors is the identification of flood prone areas through fluvial hydraulic modelling in which a detailed knowledge of the terrain plays an important role for reliable results. Recent studies have demonstrated the suitability of the Reduced Cost Aerial Precision Photogrammetry (RC-APP) technique for fluvial applications by accurate-detailed-reliable Digital Terrain Models (DTMs, up to: 100 point/m2; vertical-uncertainty: 0.06 m). This work aims to provide an optimal relationship between point densities and vertical-uncertainties to generate more reliable fluvial hazard maps by fluvial-DTMs. This is performed through hydraulic models supported by geometric models that are obtained from a joint strategy based on Structure from Motion and Cloth Simulation Filtering algorithms. Furthermore, to evaluate vertical-DTM, uncertainty is proposed as an alternative approach based on the method of robust estimators. This offers an error dispersion value analogous to the concept of standard deviation of a Gaussian distribution without requiring normality tests. This paper reinforces the suitability of new geomatic solutions as a reliable-competitive source
of accurate DTMs at the service of a flood hazard assessment.S
Heidegger y la fenomenología de la existencia: una analítica cinematográfica del aburrimiento en la modernidad
This paper presents philosophical perspectives related to the
concept of boredom (Langeweile) from the point of view of its forms
(“because of…”, “in…”, “one gets bored”) and structural modes
(leaving empty spaces and postponing) as developed by Martin
Heidegger in his lectures at the University of Freiburg during the
winter semesters of 1929 and 1930. We highlight a philosophical
stance often overlooked in comparison to more traditional positions
in Western philosophical thought—through the proposed
hermeneutic-phenomenological processes, this will allow us to
interweave their philosophical images with cinematographic narratives
that enrich the factual understanding of modernity. For
this reason, we assume boredom and its essence, “tediousness”
(Langweiligkeit), as the fundamental mood (Grundstimmung) of
our era, thus permitting other mobilities of thought that warrant a
study of phenomena relating to cultural entertainment as a symptom
of the modern disease that distances Dasein from meeting,
questioning, and self-care.Este artículo presenta una mirada filosófica al concepto
de “aburrimiento” (Langeweile) desde sus formas (“por…”,
“en…”, “uno se aburre”) y modos estructurales (dejar vacíos y
dar largas), trabajados por Martin Heidegger en sus clases en
Universidad de Friburgo durante los semestres de invierno de
1929 y 1930. Rescatamos una postura filosófica marginal a las
posiciones tradicionales del pensamiento filosófico occidental,
pudiendo, en el tránsito hermenéutico-fenomenológico
propuesto, entrecruzar sus imágenes filosóficas con narrativas
cinematográficas que enriquezcan la comprensión fáctica de
la modernidad. Debido a esto, asumimos el aburrimiento y su
esencia, la aburribilidad (Langweiligkeit) como el temple anímico
fundamental (Grundstimmung) de nuestra era, permitiendo así
otras movilidades de pensamiento para estudiar los fenómenos
del entretenimiento cultural y el imperar técnico y tecnológico
como síntomas de la enfermedad moderna que pretende alejar al
Dasein del encuentro, interrogación y cuidado de sí
Acumulación simultánea de múltiples metales pesados por cultivos in vitro de plántulas de Prosopis laevigata
Se investigó la capacidad de plántulas de Prosopis laevigata para tolerar y acumular de forma simultánea hasta 4 metales pesados (cromo, níquel, cadmio y plomo), bajo condiciones de cultivo in vitro.Experiments were conducted to investigate the capability of Prosopis laevigata to individually or simultaneously uptake four heavy metals (HM; Cr, Ni, Cd, and Pb). To this end, P. laevigata seedlings were cultured during 50 days on modified MS medium supplemented with 30 g L−1 of sucrose and added with 1, 2, 3 or 4 HM (50 mg L−1 of each HM). When the four HM were added simultaneously, the medium was supplemented with or without ethylenediaminetetracetic acid (EDTA). In the MS media contained only one HM, the seedlings tolerance to HM was as follows: Pb≥Cr>Ni≥Cd. The accumulation of HM from higher to lower concentration in shoots was Pb≥Ni>Cd>>Cr and in roots Cr>>Pb>>Ni>Cd. When the media contained more than one HM, the accumulation in shoots was the highest for Ni and the lowest for Pb, whether EDTA was added or not. EDTA supplementation increased 61, 39, 22, and 3 fold uptake of Cr, Ni, Pb, and Cd in roots, respectively
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