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Empirical Mode Decomposition-k Nearest Neighbor Models for Wind Speed Forecasting  [PDF]
Ye Ren, P. N. Suganthan
Journal of Power and Energy Engineering (JPEE) , 2014, DOI: 10.4236/jpee.2014.24025
Abstract: Hybrid model is a popular forecasting model in renewable energy related forecasting applications.
Wind speed forecasting, as a common application, requires fast and accurate forecasting models. This paper introduces an Empirical Mode Decomposition (EMD) followed by a k Nearest Neighbor (kNN) hybrid model for wind speed forecasting. Two configurations of EMD-kNN are discussed in details: an EMD-kNN-P that applies kNN on each decomposed intrinsic mode function (IMF) and residue for separate modelling and forecasting followed by summation and an EMD-kNN-M that forms a feature vector set from all IMFs and residue followed by a single kNN modelling and forecasting. These two configurations are compared with the persistent model and the conventional kNN model on a wind speed time series dataset from Singapore. The results show that the two EMD-kNN hybrid models have good performance for longer term forecasting and EMD-kNN-M has better performance than EMD-kNN-P for shorter term forecasting.
Determination of Stratigraphy—Soil Types—Using Cone Penetration Test in Sedimentary Deposits in North-East of Argentina  [PDF]
Dante René Bosch, Rubén Rafael Sotelo
Journal of Geoscience and Environment Protection (GEP) , 2015, DOI: 10.4236/gep.2015.36019
Abstract: One of the main uses of the cone penetration test (CPT) is to determinate the underground stratigraphy identifying the soils types present. Diverse researchers intended to identify the soils in function of results of CPT by means of the use of classification graphics based on empiric correlations. Also, they stand out the necessity to continue getting into these studies and they emphasize that local experiences could differ from the studies carried out. The experience in the NEA region of our country regarding the use of the CPT is recent; it was incorporated by the middle of the 90s. However, its continuous and systematic use in geotechnical studies makes that today it has a big database enough to verify the application of international correlations to the soils of the region. The objective of the work consists of verifying the application of the method of identification of soils to the sedimentary soils of the NEA, by means of the analysis of tests of CPT made in different points of the states of Chaco and Corrientes. The results of the study reveal that a good agreement exists among the stratigraphy obtained from CPT tests and those obtained by traditional methods. Although the analyzed universe of data is not of great magnitude and it should be enlarged, it is concluded in a preliminary way that for the soils of the region a good correlation exists between the classification chart with base in CPT and the traditional Unified Soil Classification System (USCS).
Una reivindicación de la ense?anza de la historia y la geografía de tipo nacional en el contexto del nuevo (des)orden educativo mundial
Vega Cantor,Renán;
Folios , 2008,
Abstract: in this paper certain aspects related to the teaching of histoy and geography are examined in the current context. for this purpose, a reflexion about three topics is presented. in the first place, some characteristics of the new educative global (dis)order are considered. sencondly, the impact of educative transformations on school social sciences is analyzed. finally, a nationalistic approach to the teaching history and geography is proposed, as part of a general project directed to the recovery of a critical point of view for school kwnowledge. this approach could serve students of our times to be in touch with a way of thinking alternative to the etherial school social sciences that have been imposed in colombian educational system.
LOS DERECHOS FUNDAMENTALES: LA CONSTITUCIóN Y LOS TRATADOS EN EL ORDENAMIENTO JURíDICO DE BOLIVIA
Baldivieso Guzmán,René;
Ius et Praxis , 2003, DOI: 10.4067/S0718-00122003000100010
Abstract: human rights have had constitutional protection since the first bolivian constitution of 1826. article 7o. of the current constitution of 1994 enumerates the fundamental rights, although article 35 stipulates that the protection offered by the constitution to those rights shall not be understood as a negation of others not mentioned, which emanate from the people's sovereignty and the republican form of government. since the establishment of the constitutional court in bolivia, the protection of human rights has strengthened, with the court often invoking the american convention on human rights, the american declaration of the rights and duties of man, and the universal declaration on human rights, as bases for its ruling, thus acknowledging the connection between internal law and the international law of human rights.
DEL ANACRONISMO EN HISTORIA Y EN CIENCIAS SOCIALES
Silva Olarte,Renán;
Historia Crítica , 2009,
Abstract: this article briefy examines a subject repeatedly addressed by historians: the anachronism. called the historian's "sin of sins" by lucien febvre, the article shows the current relevance of this issue and underscores the need to be continuously vigilant with respect to this obstacle to historical understanding, particularly since it is capable of assuming the most surprising forms.
La enfermedad y el sentido del sufrimiento
Zamora Marín,René;
Revista Cubana de Salud Pública , 2009, DOI: 10.1590/S0864-34662009000100018
Abstract: this article addresses the problem of suffering in the sick person and defines it as the lack of wellbeing. not always can moderate state of physical pain be considered suffering as such. the only way of eliminating suffering and turning it into joy and peace is to find the meaning. the patient who suffers should be capable of turning the meaning of his/her pain into an ally, aided by himself/herself and by his/her physician. beyond any doubt, this is the biggest challenge that a sick person may meet. futile suffering is the logical explanation of why one truly and fully suffers, the highest expression of which is the moral suffering that even when it disappears, it always leaves behind lasting impressions that continue to be the object of grief. this is the reason why the morale of each patient must be boosted; this is an action that is part of the art of curing as such, a task that all physicians are called upon to perform. therefore, the physicians, who are the ones that treat suffering people on a regular basis, should cultivate a culture of the meaning of suffering for their patients and for them.
La enfermedad y el sentido del sufrimiento
Zamora Marín,René;
Revista Cubana de Salud Pública , 2009, DOI: 10.1590/S0864-34662009000100019
Abstract: this article addresses the problem of suffering in the sick person and defines it as the lack of wellbeing. not always can moderate state of physical pain be considered suffering as such. the only way of eliminating suffering and turning it into joy and peace is to find the meaning. the patient who suffers should be capable of turning the meaning of his/her pain into an ally, aided by himself/herself and by his/her physician. beyond any doubt, this is the biggest challenge that a sick person may meet. futile suffering is the logical explanation of why one truly and fully suffers, the highest expression of which is the moral suffering that even when it disappears, it always leaves behind lasting impressions that continue to be the object of grief. this is the reason why the morale of each patient must be boosted; this is an action that is part of the art of curing as such, a task that all physicians are called upon to perform. therefore, the physicians, who are the ones that treat suffering people on a regular basis, should cultivate a culture of the meaning of suffering for their patients and for them.
El libro popular en Colombia , 1930 - 1948: Estrategias editoriales, formas textuales y sentidos propuestos al lector
Silva,Renán;
Revista de Estudios Sociales , 2008,
Abstract: this article explores a group of editorial mechanisms through which editors shape books as a function of their readers ideals. it also examines the commonplace notion in the history of publishing and reading that "meaning is inscribed in its own material forms": in the case of the book, though the visual, typography, the relationship between the white page and black letters, size, binding, etc. the article is based on a careful study of a collection of popular books, the spanish araluce collection, which circulated widely in both colombian cities and the countryside during the frst half of the twentieth century.
Parasitoidismo por dípteros en larvas de Caligo atreus (Lepidoptera:Nymphalidae)en Cartago,Costa Rica
Calvo,Renán;
Revista de Biología Tropical , 2004,
Abstract: dipteran parasitoidism on larvae of caligo atreus (lepidoptera:nymphalidae)in cartago, costa rica.parasitoids on larvae of caligo atreus were studied at the estación de biología tropical in río macho,cartago,costa rica.(1 600 masl),from march through july 2000.fifth instar larvae of c.atreus were placed on heliconia tortuosa griggs var.red twist (heliconiaceae)host plants at a mean temperature of 16.7 °c. the parasitoids obtained belong to an unidentified species of the genus winthemia (diptera:tachinidae).most flies emerge some 40 days after the eggs were laid (maximum 68 days).they make an orifice on the upper ventral part of the lepidopteran pupa. winthemia is used commercially as biological control of cotton and banana. rev.biol.trop.52(4):915-917.epub 2005 jun 24.
éxito reproductivo de Caligo atreus (Lepidoptera: Nymphalidae) en condiciones de cultivo
Calvo,Renán;
Revista de Biología Tropical , 1999,
Abstract: en río macho, cartago, costa rica, se estudiaron en cautiverio, los estados del ciclo de vida de caligo atreus (lepidoptera: nymphalidae), con heliconia tortuosa (heliconiaceae) como planta hospedera. los huevos fueron colocados en cajas de petri para obtener las larvas. se observaron 200 larvas para determinar el porcentaje de pupas formadas. adicionalmente se recolectaron 6904 pupas provenientes de otros adultos y se clasificaron en cuatro categorías según sus características físicas. de éstas, 49 se pesaron y estudiaron para determinar la proporción de sexos. el porcentaje de huevos eclosionados fue de 74.4 % y el de pupas de 76.5%. el peso de las pupas que originan hembras es mayor que el que originan machos observándose diferencia significativa entre ambos pesos.
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