The Experts below are selected from a list of 57039 Experts worldwide ranked by ideXlab platform

William N. Shafarman - One of the best experts on this subject based on the ideXlab platform.

  • a stochastic model of solid state thin film deposition application to chalcopyrite growth
    arXiv: Materials Science, 2016
    Co-Authors: Robert J Lovelett, William N. Shafarman, R W Birkmire, Xueqi Pang, Tyler M Roberts, Babatunde A Ogunnaike
    Abstract:

    Developing high fidelity quantitative models of solid state reaction systems can be challenging, especially in deposition systems where, in addition to the multiple competing processes occurring simultaneously, the solid interacts with its atmosphere. In this work, we develop a model for the growth of a thin solid film where species from the atmosphere adsorb, diffuse, and react with the film. The model is mesoscale and describes an entire film with thickness on the order of microns. Because it is stochastic, the model allows us to examine inhomogeneities and agglomerations that would be impossible to characterize with deterministic methods. We demonstrate the modeling approach with the example of chalcopyrite Cu(Inga)(SeS)$_2$ thin film growth via precursor reaction, which is a common industrial method for fabricating thin film photovoltaic modules. The model is used to understand how and why through-film variation in the composition of Cu(Inga)(SeS)$_2$ thin films arises and persists. We believe that the model will be valuable as an effective quantitative description of many other materials systems used in semiconductors, energy storage, and other fast-growing industries.

  • Formation of Ga2O3 barrier layer in Cu (Inga) Se2 superstrate devices with ZnO buffer layer
    MRS Proceedings, 2013
    Co-Authors: Jes K Larsen, William N. Shafarman
    Abstract:

    The junction formation when Cu(Inga)Se2 is deposited onto ZnO in a superstrate configuration (glass/window/buffer/Cu(Inga)Se2/contact) is investigated by x-ray photoelectron spectroscopy and analysis of device behavior. When Cu(Inga)Se2 is deposited on ZnO, a Ga2O3 layer is formed at the interface. Approaches to avoid the formation of this unfavorable interlayer are investigated. This includes modifications of the process to reduce the thermal load during deposition and improvement of the thermal stability of the ZnO buffer layer. It was demonstrated that both lowering of the substrate deposition temperature and deposition of the ZnO buffer layer at elevated temperature limits the Ga2O3 formation. The presence of Ga2O3 at the junction does affect the device behavior, resulting in a kink in JV curves measured under illumination. This behavior is absent in devices with limited Ga2O3 formation.

  • device characterization of agcu Inga se 2 solar cells
    Photovoltaic Specialists Conference, 2010
    Co-Authors: William N. Shafarman, Christopher P Thompson, J H Boyle, Gregory M Hanket, Peter T Erslev, David J Cohen
    Abstract:

    Ag-alloying of Cu(Inga)Se 2 thin films presents the possibility to increase the bandgap with improved structural properties as a result of a lower melting temperature. (AgCu)(Inga)Se 2 films were deposited by elemental co-evaporation and the resulting solar cell behavior was characterized. While the bandgap in the highest efficiency Cu(Inga)Se 2 cells is ∼1.15 eV, Ag alloying allows the bandgap to be increased to 1.3 eV with an increase in V OC , no loss in device efficiency, and fill factors up to 80%. With high Ga content to increase bandgap > 1.5 eV, Ag alloying improves solar cell efficiency. Analysis of the device behavior shows that the basic mechanisms controlling (AgCu)(Inga)Se 2 solar cells and limiting performance with wide bandgap are comparable to those with Cu(Inga)Se 2 . Finally the effect of Na in (AgCu)(Inga)Se 2 devices is shown to be comparable to that with Cu(Inga)Se 2 including a decrease in V OC attributed to interface recombination with insufficient Na.

  • Characterization and device performance of (AgCu)(Inga)Se 2 absorber layers
    2009 34th IEEE Photovoltaic Specialists Conference (PVSC), 2009
    Co-Authors: Gregory M Hanket, J H Boyle, William N. Shafarman
    Abstract:

    The study of (AgCu)(Inga)Se 2 absorber layers is of interest in that Ag-chalcopyrites exhibit both wider bandgaps and lower melting points than their Cu counterparts. (AgCu)(Inga)Se 2 absorber layers were deposited over the composition range 0 ≪ Ag/(Ag+Cu) ≪ 1 and 0.3 ≪ Ga/(In+Ga) ≪ 1.0 using a variety of elemental co-evaporation processes. Films were found to be single-phase over the entire composition range, in contrast to prior studies. Devices with Ga content 0.3 ≪ Ga/(In+Ga) ≪ 0.5 tolerated Ag incorporation up to Ag/(Ag+Cu) = 0.5 without appreciable performance loss. Ag-containing films with Ga/(In+Ga) = 0.8 showed improved device characteristics over Cu-only control samples, in particular a 30–40% increase in short-circuit current. An absorber layer with composition Ag/(Ag+Cu) = 0.75 and Ga/(In+Ga) = 0.8 yielded a device with V OC = 890 mV, J SC = 20.5 mA/cm2, fill factor = 71.3%, and η = 13.0%.

  • incongruent reaction of cu Inga intermetallic precursors in h2se and h2s
    Journal of Applied Physics, 2007
    Co-Authors: Gregory M Hanket, William N. Shafarman, B E Mccandless, Robert W Birkmire
    Abstract:

    The reaction pathways to form Cu(Inga)Se2 or Cu(Inga)S2 films at 450°C from metallic precursors were evaluated by reacting Cu–In–Ga films in H2Se or H2S for 10, 30, or 90min and characterizing the phase composition of the resulting films. A starting composition comprising Cu9(In0.64Ga0.36)4 and In phases was detected by x-ray diffraction in Cu–Ga–In precursors annealed at 450°C in an Ar atmosphere. When the precursors were reacted in H2Se, a graded Cu(Inga)Se2 film was formed with a Ga-rich composition and residual Cu–Ga intermetallics at the interface with the Mo back contact. The intermetallic compounds were observed to evolve from Cu9(In0.64Ga0.36)4 to Cu9Ga4 with increasing selenization time. Reaction in H2S formed inhomogeneous Cu(Inga)S2 with Cu–In intermetallics. The results are consistent with thermochemical predictions of the preferential reaction of In with Se, and Ga with S. These reaction preferences can explain the formation of a graded Cu(Inga)Se2 film during reaction in H2Se and provide a r...

Thomas A Kursar - One of the best experts on this subject based on the ideXlab platform.

  • coevolutionary arms race versus host defense chase in a tropical herbivore plant system
    Proceedings of the National Academy of Sciences of the United States of America, 2017
    Co-Authors: Maria Jose Endara, Phyllis D. Coley, Kyle G Dexter, James A Nicholls, Gabrielle Ghabash, David A Donoso, Graham N Stone, Toby R Pennington, Thomas A Kursar
    Abstract:

    Abstract Coevolutionary models suggest that herbivores drive diversification and community composition in plants. For herbivores, many questions remain regarding how plant defenses shape host choice and community structure. We addressed these questions using the tree genus Inga and its lepidopteran herbivores in the Amazon. We constructed phylogenies for both plants and insects and quantified host associations and plant defenses. We found that similarity in herbivore assemblages between Inga species was correlated with similarity in defenses. There was no correlation with phylogeny, a result consistent with our observations that the expression of defenses in Inga is independent of phylogeny. Furthermore, host defensive traits explained 40% of herbivore community similarity. Analyses at finer taxonomic scales showed that different lepidopteran clades select hosts based on different defenses, suggesting taxon-specific histories of herbivore–host plant interactions. Finally, we compared the phylogeny and defenses of Inga to phylogenies for the major lepidopteran clades. We found that closely related herbivores fed on Inga with similar defenses rather than on closely related plants. Together, these results suggest that plant defenses might be more evolutionarily labile than the herbivore traits related to host association. Hence, there is an apparent asymmetry in the evolutionary interactions between Inga and its herbivores. Although plants may evolve under selection by herbivores, we hypothesize that herbivores may not show coevolutionary adaptations, but instead “chase” hosts based on the herbivore’s own traits at the time that they encounter a new host, a pattern more consistent with resource tracking than with the arms race model of coevolution.

  • dispersal assembly of rain forest tree communities across the amazon basin
    Proceedings of the National Academy of Sciences of the United States of America, 2017
    Co-Authors: Phyllis D. Coley, Kyle G Dexter, Matt Lavin, Benjamin M Torke, Alex D Twyford, Thomas A Kursar, Camila Drake
    Abstract:

    We investigate patterns of historical assembly of tree communities across Amazonia using a newly developed phylogeny for the species-rich neotropical tree genus Inga. We compare our results with those for three other ecologically important, diverse, and abundant Amazonian tree lineages, Swartzia, Protieae, and Guatteria. Our analyses using phylogenetic diversity metrics demonstrate a clear lack of geographic phylogenetic structure, and show that local communities of Inga and regional communities of all four lineages are assembled by dispersal across Amazonia. The importance of dispersal in the biogeography of Inga and other tree genera in Amazonian and Guianan rain forests suggests that speciation is not driven by vicariance, and that allopatric isolation following dispersal may be involved in the speciation process. A clear implication of these results is that over evolutionary timescales, the metacommunity for any local or regional tree community in the Amazon is the entire Amazon basin.

  • The evolution of antiherbivore defenses and their contribution to species coexistence in the tropical tree genus Inga
    Proceedings of the National Academy of Sciences of the United States of America, 2009
    Co-Authors: Thomas A Kursar, Kyle G Dexter, John Lokvam, R. Toby Pennington, James E. Richardson, Marjorie G. Weber, Eric T. Murakami, Camilla Drake, Ruth C. Mcgregor, Phyllis D. Coley
    Abstract:

    Plants and their herbivores constitute more than half of the organisms in tropical forests. Therefore, a better understanding of the evolution of plant defenses against their herbivores may be central for our understanding of tropical biodiversity. Here, we address the evolution of antiherbivore defenses and their possible contribution to coexistence in the Neotropical tree genus Inga (Fabaceae). Inga has >300 species, has radiated recently, and is frequently one of the most diverse and abundant genera at a given site. For 37 species from Panama and Peru we characterized developmental, ant, and chemical defenses against herbivores. We found extensive variation in defenses, but little evidence of phylogenetic signal. Furthermore, in a multivariate analysis, developmental, ant, and chemical defenses varied independently (were orthogonal) and appear to have evolved independently of each other. Our results are consistent with strong selection for divergent defensive traits, presumably mediated by herbivores. In an analysis of community assembly, we found that Inga species co-occurring as neighbors are more different in antiherbivore defenses than random, suggesting that possessing a rare defense phenotype increases fitness. These results imply that interactions with herbivores may be an important axis of niche differentiation that permits the coexistence of many species of Inga within a single site. Interactions between plants and their herbivores likely play a key role in the generation and maintenance of the conspicuously high plant diversity in the tropics.

  • lutein epoxide cycle light harvesting and photoprotection in species of the tropical tree genus Inga
    Plant Cell and Environment, 2008
    Co-Authors: Shizue Matsubara, Thomas A Kursar, Heinrich G Krause, Martin Seltmann, Aurelio Virgo, Peter Jahns, Klaus Winter
    Abstract:

    Dynamics and possible function of the lutein epoxide (Lx) cycle, that is, the reversible conversion of Lx to lutein (L) in the light-harvesting antennae, were investigated in leaves of tropical tree species. Photosynthetic pigments were quanti- fied in nine Inga species and species from three other genera. In Inga, Lx levels were high in shade leaves (mostly above 20 mmol mol -1 chlorophyll) and low in sun leaves. In Virola surinamensis, both sun and shade leaves exhibited very high Lx contents (about 60 mmol mol -1 chlorophyll). In Inga marginata grown under high irradiance, Lx slowly accumulated within several days upon transfer to deep shade. When shade leaves of I. marginata were briefly exposed to the sunlight, both violaxanthin and Lx were quickly de-epoxidized. Subsequently, overnight recovery occurred only for violaxanthin, not for Lx. In such leaves, containing reduced levels of Lx and increased levels of L, chlorophyll fluorescence induction showed significantly slower reduction of the photosystem II electron acceptor, QA, and faster formation as well as a higher level of non- photochemical quenching.The results indicate that slow Lx accumulation in Inga leaves may improve light harvesting under limiting light, while quick de-epoxidation of Lx to L in response to excess light may enhance photoprotection.

  • cinnamoyl glucosides of catechin and dimeric procyanidins from young leaves of Inga umbellifera fabaceae
    Phytochemistry, 2004
    Co-Authors: John Lokvam, Phyllis D. Coley, Thomas A Kursar
    Abstract:

    The rapidly growing, nearly achlorophyllous, young leaves of Inga umbellifera express high concentrations of mono and dimeric 3-O-gluco-cinnamoyl catechin/epicatechin, rare forms of substituted flavan-3-ols.Here we present structures for five novel compounds in this class: three monomers [catechin-3-O--d-gluco(2-cinnamoyl)pyranoside, catechin-3-O--d-gluco(6-cinnamoyl) pyranoside, catechin-3-O--d-gluco(2,6-biscinnamoyl)pyranoside] and two dimeric procyanidins [catechin-3-O--d-glucopyrano(4a!8)-catechin-3-O--d-gluco(2-cinnamoyl)pyranoside and catechin-3-O--d-glucopyrano-(4a!8)-epicatechin-3-O--d-gluco(6cinnamoyl)pyranoside].The young leaves of Inga umbellifera express high concentrations of 3-O-(cinnamoyl)glucosides of catechin and epicatechin. # 2004 Elsevier Ltd.All rights reserved.

Phyllis D. Coley - One of the best experts on this subject based on the ideXlab platform.

  • tracking of host defenses and phylogeny during the radiation of neotropical Inga feeding sawflies hymenoptera argidae
    Frontiers in Plant Science, 2018
    Co-Authors: Maria Jose Endara, Phyllis D. Coley, Kyle G Dexter, James A Nicholls, Dale L Forrister, Gordon C Younkin, Catherine A Kidner, R T Pennington
    Abstract:

    Coevolutionary theory has long predicted that the arms race between plants and herbivores is a major driver of host selection and diversification. At a local scale, plant defenses contribute significantly to the structure of herbivore assemblages and the high alpha diversity of plants in tropical rain forests. However, the general importance of plant defenses in host associations and divergence at regional scales remains unclear. Here, we examine the role of plant defensive traits and phylogeny in the evolution of host range and species divergence in leaf-feeding sawflies of the family Argidae associated with Neotropical trees in the genus Inga throughout the Amazon, the Guiana Shield and Panama. Our analyses show that the phylogenies of both the sawfly herbivores and their Inga hosts are congruent, and that sawflies radiated at approximately the same time, or more recently than their Inga hosts. Analyses controlling for phylogenetic effects show that the evolution of host use in the sawflies associated with Inga is better correlated with Inga chemistry than with Inga phylogeny, suggesting a pattern of delayed host tracking closely tied to host chemistry. Finally, phylogenetic analyses show that sister species of Inga-sawflies are dispersed across the Neotropics, suggesting a role for allopatric divergence and vicariance in Inga diversification. These results are consistent with the idea that host defensive traits play a key role not only in structuring the herbivore assemblages at a single site, but also in the processes shaping host association and species divergence at a regional scale.

  • coevolutionary arms race versus host defense chase in a tropical herbivore plant system
    Proceedings of the National Academy of Sciences of the United States of America, 2017
    Co-Authors: Maria Jose Endara, Phyllis D. Coley, Kyle G Dexter, James A Nicholls, Gabrielle Ghabash, David A Donoso, Graham N Stone, Toby R Pennington, Thomas A Kursar
    Abstract:

    Abstract Coevolutionary models suggest that herbivores drive diversification and community composition in plants. For herbivores, many questions remain regarding how plant defenses shape host choice and community structure. We addressed these questions using the tree genus Inga and its lepidopteran herbivores in the Amazon. We constructed phylogenies for both plants and insects and quantified host associations and plant defenses. We found that similarity in herbivore assemblages between Inga species was correlated with similarity in defenses. There was no correlation with phylogeny, a result consistent with our observations that the expression of defenses in Inga is independent of phylogeny. Furthermore, host defensive traits explained 40% of herbivore community similarity. Analyses at finer taxonomic scales showed that different lepidopteran clades select hosts based on different defenses, suggesting taxon-specific histories of herbivore–host plant interactions. Finally, we compared the phylogeny and defenses of Inga to phylogenies for the major lepidopteran clades. We found that closely related herbivores fed on Inga with similar defenses rather than on closely related plants. Together, these results suggest that plant defenses might be more evolutionarily labile than the herbivore traits related to host association. Hence, there is an apparent asymmetry in the evolutionary interactions between Inga and its herbivores. Although plants may evolve under selection by herbivores, we hypothesize that herbivores may not show coevolutionary adaptations, but instead “chase” hosts based on the herbivore’s own traits at the time that they encounter a new host, a pattern more consistent with resource tracking than with the arms race model of coevolution.

  • dispersal assembly of rain forest tree communities across the amazon basin
    Proceedings of the National Academy of Sciences of the United States of America, 2017
    Co-Authors: Phyllis D. Coley, Kyle G Dexter, Matt Lavin, Benjamin M Torke, Alex D Twyford, Thomas A Kursar, Camila Drake
    Abstract:

    We investigate patterns of historical assembly of tree communities across Amazonia using a newly developed phylogeny for the species-rich neotropical tree genus Inga. We compare our results with those for three other ecologically important, diverse, and abundant Amazonian tree lineages, Swartzia, Protieae, and Guatteria. Our analyses using phylogenetic diversity metrics demonstrate a clear lack of geographic phylogenetic structure, and show that local communities of Inga and regional communities of all four lineages are assembled by dispersal across Amazonia. The importance of dispersal in the biogeography of Inga and other tree genera in Amazonian and Guianan rain forests suggests that speciation is not driven by vicariance, and that allopatric isolation following dispersal may be involved in the speciation process. A clear implication of these results is that over evolutionary timescales, the metacommunity for any local or regional tree community in the Amazon is the entire Amazon basin.

  • The evolution of antiherbivore defenses and their contribution to species coexistence in the tropical tree genus Inga
    Proceedings of the National Academy of Sciences of the United States of America, 2009
    Co-Authors: Thomas A Kursar, Kyle G Dexter, John Lokvam, R. Toby Pennington, James E. Richardson, Marjorie G. Weber, Eric T. Murakami, Camilla Drake, Ruth C. Mcgregor, Phyllis D. Coley
    Abstract:

    Plants and their herbivores constitute more than half of the organisms in tropical forests. Therefore, a better understanding of the evolution of plant defenses against their herbivores may be central for our understanding of tropical biodiversity. Here, we address the evolution of antiherbivore defenses and their possible contribution to coexistence in the Neotropical tree genus Inga (Fabaceae). Inga has >300 species, has radiated recently, and is frequently one of the most diverse and abundant genera at a given site. For 37 species from Panama and Peru we characterized developmental, ant, and chemical defenses against herbivores. We found extensive variation in defenses, but little evidence of phylogenetic signal. Furthermore, in a multivariate analysis, developmental, ant, and chemical defenses varied independently (were orthogonal) and appear to have evolved independently of each other. Our results are consistent with strong selection for divergent defensive traits, presumably mediated by herbivores. In an analysis of community assembly, we found that Inga species co-occurring as neighbors are more different in antiherbivore defenses than random, suggesting that possessing a rare defense phenotype increases fitness. These results imply that interactions with herbivores may be an important axis of niche differentiation that permits the coexistence of many species of Inga within a single site. Interactions between plants and their herbivores likely play a key role in the generation and maintenance of the conspicuously high plant diversity in the tropics.

  • cinnamoyl glucosides of catechin and dimeric procyanidins from young leaves of Inga umbellifera fabaceae
    Phytochemistry, 2004
    Co-Authors: John Lokvam, Phyllis D. Coley, Thomas A Kursar
    Abstract:

    The rapidly growing, nearly achlorophyllous, young leaves of Inga umbellifera express high concentrations of mono and dimeric 3-O-gluco-cinnamoyl catechin/epicatechin, rare forms of substituted flavan-3-ols.Here we present structures for five novel compounds in this class: three monomers [catechin-3-O--d-gluco(2-cinnamoyl)pyranoside, catechin-3-O--d-gluco(6-cinnamoyl) pyranoside, catechin-3-O--d-gluco(2,6-biscinnamoyl)pyranoside] and two dimeric procyanidins [catechin-3-O--d-glucopyrano(4a!8)-catechin-3-O--d-gluco(2-cinnamoyl)pyranoside and catechin-3-O--d-glucopyrano-(4a!8)-epicatechin-3-O--d-gluco(6cinnamoyl)pyranoside].The young leaves of Inga umbellifera express high concentrations of 3-O-(cinnamoyl)glucosides of catechin and epicatechin. # 2004 Elsevier Ltd.All rights reserved.

B E Mccandless - One of the best experts on this subject based on the ideXlab platform.

  • incongruent reaction of cu Inga intermetallic precursors in h2se and h2s
    Journal of Applied Physics, 2007
    Co-Authors: Gregory M Hanket, William N. Shafarman, B E Mccandless, Robert W Birkmire
    Abstract:

    The reaction pathways to form Cu(Inga)Se2 or Cu(Inga)S2 films at 450°C from metallic precursors were evaluated by reacting Cu–In–Ga films in H2Se or H2S for 10, 30, or 90min and characterizing the phase composition of the resulting films. A starting composition comprising Cu9(In0.64Ga0.36)4 and In phases was detected by x-ray diffraction in Cu–Ga–In precursors annealed at 450°C in an Ar atmosphere. When the precursors were reacted in H2Se, a graded Cu(Inga)Se2 film was formed with a Ga-rich composition and residual Cu–Ga intermetallics at the interface with the Mo back contact. The intermetallic compounds were observed to evolve from Cu9(In0.64Ga0.36)4 to Cu9Ga4 with increasing selenization time. Reaction in H2S formed inhomogeneous Cu(Inga)S2 with Cu–In intermetallics. The results are consistent with thermochemical predictions of the preferential reaction of In with Se, and Ga with S. These reaction preferences can explain the formation of a graded Cu(Inga)Se2 film during reaction in H2Se and provide a r...

  • device and material characterization of cu Inga se2 solar cells with increasing band gap
    Journal of Applied Physics, 1996
    Co-Authors: William N. Shafarman, R Klenk, B E Mccandless
    Abstract:

    Thin‐film solar cells have been fabricated from Cu(Inga)Se2 films which were deposited by four‐source elemental evaporation with [Ga]/([In]+[Ga]) from 0.27 to 0.69 corresponding to a band gap from 1.16 to 1.45 eV. The films were intentionally deposited with no grading of the Ga and In to avoid gradients in their electrical and optical properties. X‐ray diffraction, energy‐dispersive x‐ray spectroscopy, and Auger electron spectroscopy show that the films have uniform composition with no change in structure and morphology. Glass/Mo/Cu(Inga)Se2/CdS/ZnO devices have open‐circuit voltage increasing over the entire band gap range to 788 mV and 15% total area efficiency for band gap less than 1.3 eV, or [Ga]/([In]+[Ga]) less than 0.5. A decrease in device efficiency with higher Ga content is caused primarily by a lower fill factor. Analysis of current–voltage and quantum efficiency measurements show that this results from a voltage‐dependent current collection.

Pérez Orozco, Carlos Enrique - One of the best experts on this subject based on the ideXlab platform.

  • Chasam Munanchi PurIngapa Nukanchi Iachaikunawa (Así queremos caminar con nuestros saberes)
    2024
    Co-Authors: Pérez Orozco, Carlos Enrique
    Abstract:

    Los saberes propios de la cultura Inga serían inabarcables en un texto. El intento de condensarlos en un currículo, o un plan de estudios, tampoco podría dar cuenta de su complejidad, de sus múltiples interconexiones, de su textura epistemológica; mucho menos un material como el que aquí se presenta puede pretender ser completo o cerrar los contenidos posibles. Hay muchas razones por las cuales un compendio de saberes Inga sería imposible, lo cual pone límites y propósito al objeto de este libro. Mencionaremos aquí solo 3: la relación saber – sabedor, que no permite hacer del conocimiento un objeto, la contextualidad práctica del saber, que lo refiere a un quehacer en la resolución de problemas para el buen vivir, y la diversidad interna de los saberes del pueblo Inga, que hace de “lo Inga” una categoría que no puede sino referirse a contextos culturales específicos, so pena de caer en groseras generalizaciones y abstracciones. A partir de esa conciencia, se tratará de explicar el alcance de este texto, que no es más que un dinamizador de prácticas pedagógicas en la escuela, que puede dar cauce al plan de estudios del eje de Territorio y cosmovisión del Proyecto Etnoeducativo del Pueblo Inga “Chasam Munanchi PurIngapa Nukanchi Iachaikunawa (Así queremos caminar con nuestros saberes)”Departamento Administrativo de Ciencia, Tecnología e Innovación [CO] Colciencias1228-571-35538Lineamientos curriculares y currículo intercultural en ciencias naturales, aplicables a centros educativos de las comunidades de los pueblos Awá e Inga de Putumayo y Nariñon

  • Proyecto Etnoeducativo del Pueblo Inga. Chasam Munanchi PurIngapa Nukanchi Iachaikunawa (Así queremos caminar con nuestros saberes)
    2024
    Co-Authors: Pérez Orozco, Carlos Enrique
    Abstract:

    El Proyecto Etnoeducativo del Pueblo Inga (en adelante PEPI), titulado Chasam Munanchi PurIngapa Nukanchi Iachaikunawa (así queremos caminar con nuestros saberes) fue construido con amplia participación de autoridades, educadores y representantes de todas las comunidades del pueblo Inga con el patrocinio del Ministerio de Educación Nacional entre 2009 y 2010. Desde este tiempo, los documentos que condensaron la formulación del proyecto (El texto del proyecto, el orientador, las bitácoras de cada uno de los distintos ejes formulados) aunque sin publicar y validar, circularon entre las diversas Instituciones Educativas del Pueblo Inga (en adelante IEI) y se convirtieron en los referentes para la planeación de sus proyectos educativos particulares. En tanto directrices consensuadas por el pueblo Inga, cada IEI, en ejercicio de su autonomía, los ha tenido en cuenta como punto de partida para su labor educativa. Sin embargo, aunque ha habido sintonía y apropiación del PEPI en su orientación filosófica y pedagógica, en sus fines y principios, en su enfoque y alcances, el tránsito a convertir sus lineamientos en diseños didácticos o desarrollar los ejes integradores del proyecto, llevan a la práctica las “rutas generales” y los 8 proyectos pedagógicos que se formularon en él, el proceso ha tenido algunos escollos desde entonces.Departamento Administrativo de Ciencia, Tecnología e Innovación [CO] Colciencias1228-571-35538Lineamientos curriculares y currículo intercultural en ciencias naturales, aplicables a centros educativos de las comunidades de los pueblos Awá e Inga de Putumayo y Nariñon

  • Alli Kilkay, Critical Approach To The Inga Spelling
    2024
    Co-Authors: Pérez Orozco, Carlos Enrique
    Abstract:

    El artículo hace una revisión crítica de la llamada “unificación del Alfabeto Inga”, que fuera adoptada en 1991 tras un proceso participativo dirigido por la organización MUSU RUNAKUNA. Las observaciones son hechas desde el uso de este sistema en el Colegio Bilingüe Aborígenes de Colombia de Yunguillo, Mocoa, Putumayo, con base en consideraciones fonológicas, filológicas, de la tradición de la escritura quechua y de orden didáctico. Se fundamenta que, si bien una propuesta alternativa para entablar un debate con el fundamento de la lengua es determinante en su adopción, estos deberían tomarse tras un debate lingüístico que las soporte.The article review the “Inga alphabet unification” adopted in 19911 ubnder the direction od the MUSU RUNAKUNA organization after a participative process. These observations are made from the use of that system in the “Colegio Bilingüe Aborígenes de Colombia” of Yunguillo, Mocoa, Putumayo. This critic and proposal makes phonological and philological considerations, attends to the quechua writting traditions and didactical issues. Argue that the spelling should have bases on a linguistic debate before the poliical agreement of writng rules.Departamento Administrativo de Ciencia, Tecnología e Innovación [CO] Colciencias1228-571-35538Lineamientos curriculares y currículo intercultural en ciencias naturales, aplicables a centros educativos de las comunidades de los pueblos Awá e Inga de Putumayo y Nariñon