bluuebunny/crossref_metadata_2025 huggingface dataset:
Growth and Water Status of Pruned and Unpruned Woody Landscape Plants Treated with Sumagic (Uniconazole), Cutless (Flurprimidol), or Atrimmec (Dikegulac)
Authors: Norcini Jeffrey G.
Published: August 2020

Efficacy of Cutless (flurprimidol), Sumagic (uniconazole), and Atrimmec (dikegulac) as affected by application date after pruning was investigated with Pyracantha × ‘Teton’, Ligustrum × vicaryi, and Euonymus fortunei var. coloratus. Cutless (flurprimidol) applied to the medium surface, or foliar sprays of Sumagic (uniconazole) or Atrimmec (dikegulac) were applied 1, 2, 3 or 7 days after pruning (DAP) and to unpruned plants in spring 1989. Height and width were recorded weekly into November, 1989. The effect of these plant growth regulators (PGRs) on short-term plant water relations was measured at 2, 3, 18, 22, or 24 days on unpruned plants and plants treated 2 DAP. Growth rate of Pyracantha was reduced for 6 to 7 weeks if Sumagic (uniconazole) was applied 2 DAP or less, or to unpruned plants; otherwise growth rate was reduced 4 to 5 weeks. Sumagic (uniconazole) reduced Pyracantha growth rate more than Atrimmec (dikegulac); however, Atrimmec-treated plants had a more normal growth habit by the end of the experiment. Atrimmec (dikegulac) also suppressed Ligustrum growth without detrimentally affecting plant appearance. Cutless (flurprimidol) was the only PGR that effectively inhibited growth of Euonymus; however, this treatment excessively dwarfed Pyracantha and Ligustrum. The influence of Atrimmec (dikegulac) and Cutless (flurprimidol) on leaf area varied with the species, and pruning had no effect. Short-ternl effects of Sumagic (uniconazole), Cutless (flurprimidol), and Atrimmec (dikegulac) on transpiration and stomatal conductance to water vapor were species dependent, with some species exhibiting partial stomatal closure. Improvement of plant water status (stem water potential and relative leaf water content) occurred in some cases.
Use of Antitranspirants to Reduce Water Stress on Herbaceous and Woody Ornamentals
Authors: Dunn Bruce L. , Cole Janet C. , Payton Mark E.
Published: August 2020

Experiments were conducted to evaluate potential means for reducing moisture stress in nine herbaceous and woody ornamental species. In Expt. 1 (2009), a water only control treatment and the antitranspirant Stasis™ at two different rates were applied as a drench application before inducing drought stress in the greenhouse by withholding water for two weeks. No significant differences in visual ratings in relation to plant quality were detected among treatments 5 days after application for any species. At 10 days after treatment, visual ratings were better for Veronica at the lower Stasis™ rate, Hibiscus at the low and higher Stasis™ rate, and Weigela at lower and higher Stasis™ rate compared to no Stasis™. At 15 days after treatment, visual ratings were worse for Coreopsis, Rudbeckia, and Salvia at both low and high Stasis™ rates; but, were better for Hibiscus and Weigela at the lower and higher Stasis™ rates compared to the no Stasis™ treatment. In Expt. 2 (2010), the antitranspirants Stasis™ and Root-Zone were evaluated along with a no antitranspirant and well-watered control treatments at single rates. No significant differences in visual ratings existed among treatments five days after application for any species. At 10 days after treatment, visual ratings were higher for Coreopsis, Forsythia, Nandina, and Weigela with Stasis™ or Root-Zone compared to no antitranspirant application. Visual ratings for Rudbeckia and Salvia with Stasis™, and Euonymus with Root-Zone were also better than the stress treatment at 10 days after treatment. At 15 days after treatment, visual ratings were higher for Coreopsis and Salvia with Stasis™ compared to the stress treatment. Rudbeckia, Euonymus, and Weigela with Stasis™ or Root-Zone and Nandina with Root-Zone all had better visual ratings than the stress treatment. Evapotranspiration was not reduced for any Stasis™ or Root-Zone treatment for any species in either experiment compared to control stress treatments.
Short-term Recurring Drought Affects Growth and Photosynthetic Capacity of Four Conifer Species
Authors: Pool Joshua R. , Griffin Jason J. , Boyer Cheryl R. , Warren Stuart L.
Published: August 2020

The Midwest and southern Great Plains are known for historic and severe droughts. More common, however, are short-term recurring drought events that can limit tree survival. The pressure of environmental stress combined with numerous diseases and pests are decimating existing Pinus L. spp. (pine) plantings and driving the effort to identify alternative species. Four species of conifer were subjected to recurring moderate or severe drought to observe the effects on growth and photosynthesis. Species evaluated were: Abies nordmanniana (Nordmann fir), Cupressus arizonica (Arizona cypress), Picea engelmannii (Engelmann spruce), and Thuja × ‘Green Giant’ (‘Green Giant’ arborvitae). Recurring drought reduced height and growth index of T. × ‘Green Giant’. However, photosynthesis and root growth were unaffected by drought treatments. In contrast, reduced Pnet was the only detectable effect of recurring drought in P. engelmannii. Growth of A. nordmanniana was not affected by drought. When subjected to drought, C. arizonica reduced shoot dry weight, while maintaining photosynthesis and root growth. Overall, C. arizonica was able to maintain growth of roots and shoots as well as maintain photosynthesis which may be an advantage in the harsh climate of the Midwest and southern Great Plains.
Gasified Rice Hull Biochar Affects Nutrition and Growth of Horticultural Crops in Container Substrates
Authors: Locke James C. , Altland James E. , Ford Craig W.
Published: August 2020

This research was conducted to determine if gasified rice hull biochar (GRHB), inherently high in phosphorus and potassium content, could be used as an amendment to container substrates to eliminate the need for other phosphorus and potassium fertilizers. Geranium (Pelargonium xhortorum ‘Maverick Red’), pansy (Viola xwittrockiana ‘Mammoth Blue Deep Dazzle’), sunflower (Helianthus annus ‘Pacino Gold’), zinnia (Zinnia elegans ‘Oklahoma White’), and tomato (Lycopersicon lycopersicum ‘Mega Bite’) were grown in a standard commercial soilless substrate composed of sphagnum peat moss:perlite (85:15, by vol) and amended with 0, 5, or 10% GRHB (by vol). A group of plants labeled as NPK-fertilized controls were fertilized with 7.1 mM nitrogen (N), 0.7 mM phosphorus (P), and 1.4 mM potassium (K) derived from ammonium nitrate (NH4NO3) and potassium phosphate (K2HPO4). Other treatments received 0, 5, or 10% GRHB and fertilized with 7.1 mM N using NH4NO3. Gasified rice hull biochar had little effect on substrate pH over the course of the experiment. While pH was higher with 10% GRHB than NPK-fertilized controls by 6 weeks after potting (WAP), the difference was only 0.19 pH units. The GRHB used in this study provides a source of readily available phosphate and potassium when incorporated at 5 or 10%. While the five crops grown in this study were of similar size and lacked any signs of nutrient deficiency when amended with GRHB, foliar concentrations of P and K were low when their only source was from pre-incorporated GRHB.
Effects of Repeated Applications of Roundup Pro® Over the Top of Container-Grown Nursery Crops
Authors: Van Hoogmoed Albert , Gilliam Charles H. , Wehtje Glenn R. , Knight Patricia R. , Foshee Wheeler G. , Olive John W. , Murphy Anna-Marie
Published: August 2020

Three experiments studying the effects of repeated over-the-top applications of Roundup Pro® to container-grown nursery crops were conducted. Plants in 3.8 liter (1 gal) containers were treated with either single or multiple applications of Roundup Pro® at 1.12 kg ai·ha−1 (1.0 lb ai·A−1) in July, August, September, or October, 2008 or 2009. Plants treated with multiple applications were treated in July and August (J+A); July, August, and September (J+A+S); July, August, September, and October (J+A+S+O); or July and September (J+S). Injury ratings were taken at multiple times after treatments. Growth indices (GI) [(height + width1 + width2) / 3] were taken in January and June 2009 and February and May 2010. Plants were rated for vigor and marketability in May 2009 or June 2010. Liriope muscari ‘Big Blue,’ Camellia sasanqua ‘Shishigashira,’ and Gardenia jasminoides ‘Radicans’ were evaluated in Experiment 1 (2008, Auburn). Liriope showed minor injury from two or more applications with reduced growth from 3 or 4 applications, but all plants were rated as marketable in June of the following season. ‘Shishigashira’ camellia exhibited no injury from any glyphosate application and all parameters were similar to non-treated controls (NTC). Gardenia showed fall chlorosis and stunting through early spring from multiple applications, but all plants were marketable. Even those treated 3 or 4 times were small but marketable. In Experiment 2 (2009, Auburn. AL), ‘Big Blue’ liriope, ‘Radicans’ gardenia, Camellia sasanqua ‘Martha Sims,’ and Juniperus conferta ‘Blue Pacific’ showed no injury from any treatment and GI in January and June were similar to NTC. Ilex cornuta ‘Dwarf Burfordi’ GI were similar to NTC with occasional chlorosis observed after July treatments. Ternstroemia gymnathera (cleyera) exhibited chlorosis, necrosis, and stunting of shoot tips for all treatments. Cleyera GI in January and June indicated that J+A+S, J+A+S+O, and J+S-treated plants were smaller than NTC, but regrowth was similar to NTC for all treatments the following spring. All plants were vigorous and marketable. In Experiment 3 (2009, Mobile, AL), ‘Big Blue’ liriope, ‘Radicans’ gardenia, ‘Blue Pacific’ juniper, ‘Martha Sims’ camellia, Ilex cornuta ‘Carissa,’ and cleyera GI were similar to NTC in February and late May. Slight injury occurred only on the new growth of cleyera and ‘Carissa’ holly with primary symptoms being chlorosis and/or slight stunting seen in mid-September and October from some single and double applications.
Evaluating the Efficacy of the Systems Approach at Mitigating Five Common Pests in Oregon Nurseries
Authors: Osterbauer Nancy K. , Lujan Melissa , McAninch Gary , Lane S. , Trippe Aaron
Published: August 2020

In Oregon, the U.S. Nursery Certification (USNCP), Grower Assisted Inspection (GAIP), and Shipping Point Inspection (SPI) programs are used to certify nursery plants as pest free. To compare the programs' effectiveness for mitigating pest risk, potted plants grown within two USNCP, two GAIP, and two SPI nurseries were surveyed for Phytophthora root rot (Phytophthora spp.), Phytophthora foliar blight (Phytophthora spp.), bittercress (Cardamine spp.), snails and slugs (Class Gastropoda), and root weevils (Otiorhynchus spp.). A total of 1,635 plots were surveyed in the nurseries, with one or more pests detected in 1,003 plots. Based on the total percentage of plots found infested with a pest, significantly fewer were detected in the GAIP nurseries (55%) than in the USNCP nurseries (68%). However, bittercress incidence was significantly higher in GAIP nurseries (21%), while snails and slugs incidence was significantly higher in USNCP nurseries (49%), and Phytophthora root rot incidence was significantly higher in SPI nurseries (31%). Also, the plant families grown by the nurseries had a significant impact on pest incidence for two of the target pests, Phytophthora root rot and root weevils. While the GAIP seemed the best at mitigating pest incidence overall, none of the certification programs was consistently the most effective against all five target pests.
Composted Cotton Stalks and Cotton Gin Trash Substrate Amendments and Irrigation/Ground Cover Management I. Effect on Physical and Chemical Properties of Pine Bark and Pine Tree Substrates
Authors: Riley E.D. , Kraus H.T. , Bilderback T.E. , Jackson B.E.
Published: August 2020

This project evaluated two cotton waste products (cotton stalks and cotton gin trash) as amendments to pine bark (PB) and pine tree (PT) substrates for their impact on substrate physical and chemical properties. PB or PT substrates were amended (v/v) with cotton stalks composted with a N source (CSN), cotton stalks composted without an N source (CS), or aged cotton gin trash (CGT) at 4:1 PB:CS (PB:CS), 4:1 PB:CSN (PB:CSN), 9:1 PB:CGT (PB:CGT), 1:1 PT:CS (PT:CS), 1:1 PT:CSN (PT:CSN) and 4:1 PT:CGT (PT:CGT) (by vol). In 2010, PB-amended substrates had larger percentages of coarse (> 2.0 mm) and fine (< 0.5 mm) particles while PT-amended substrates had larger percentages of medium (0.5–2.0 mm) particles. In 2011, PB-amended substrates again had larger percentages of coarse particles, while PT-amended substrates had more medium and fine particles. Generally, most physical properties were within adequate ranges and were better than or comparable to the 100% PB control. Substrate solution pH was generally higher in the PT- than the PB-based substrates. Electrical conductivity (EC) of the substrate solution was also generally higher in the PT-based substrates compared to the PB-based substrates. Inorganic nitrogen (NH4 + NO3 + NO2), urea, P, K, Ca, and Mg concentrations in all substrate solutions, regardless of compost addition, were all below the recommended ranges by the last sample time (October 4, 2011) for the study indicating that nutrients supplied by the composts were depleted or below detection limits. However, CGT increased substrate solution P concentrations in both PB- and PT-based substrates with both overhead, sprinkler irrigation with black geotextile weed fabric covering the ground (OH) and low-volume, spray stake irrigation with gravel covering the ground (LV).
Rhizobacterial Inoculants Increase Root and Shoot Growth in ‘Tifway’ Hybrid Bermudagrass
Authors: Coy R. Murphey , Held David W. , Kloepper Joseph W.
Published: August 2020

Plant growth-promoting rhizobacteria (PGPR) are non-pathogenic, beneficial bacteria that colonize seeds and roots of plants and enhance plant growth. Although there has been extensive PGPR research with agronomic crops, there has been little emphasis on development of PGPR for grasses in pastures or as turf. Accordingly, experiments were conducted to evaluate novel bacterial inoculants for growth promotion in ‘Tifway’ hybrid bermudagrass. Replicated laboratory and greenhouse experiments evaluated effects of various PGPR mixtures, each with 3 to 5 PGPR strains and applied as weekly root inoculations, in comparison to nontreated plants. Growth promotion was assessed by measuring foliar growth from 3 to 8 wk and root growth at 8 wk after the first treatment. In all experiments, at least one bacterial treatment of bermudagrass resulted in significantly increased top growth and greater root growth (length, surface area, volume, or dry weight). PGPR blends 20 and MC3 caused the greatest growth promotion of roots and shoots. These results suggest that the bacterial strains could be used in strategies to reduce nitrogen or water inputs to turf.
Rooting Response of Stem Cuttings of Shantung Maple (Acer truncatum) to Time of Year, Cutting Position, and Auxin Concentration, Formulation, and Solvent
Authors: Brock Justin A. , Griffin Jason J.
Published: August 2020

The influence of time of year, cutting position, and auxin concentration, formulation, and solvent on rooting of stem cuttings of shantung maple (Acer truncatum Bunge) was investigated in seven experiments. Softwood, semi-hardwood, second-flush softwood, and hardwood stem-tip cuttings were compared. Semi-hardwood cuttings [15 cm (6 in) in length] rooted best (55%). Auxin treatments [indole-3-butyric acid (IBA) or the potassium (K) salt of IBA (K-IBA)] ranged from 0 to 15,000 ppm (0 to 1.5%). Generally, rooting percentage decreased as auxin concentration increased. Cutting position (terminal or subterminal), auxin formulation (liquid or powder), and auxin solvent [water or ethanol:water (1:1 v/v)] did not affect percent rooting. Mean root number and mean root length were unaffected by all treatments. Results suggest shantung maple roots best from semi-hardwood cuttings treated with auxin at concentrations of 0 or 2,500 ppm (0.25%).
Determining an Optimum Tree Species for the Phytoremediation of Cumene and 4-Cumylphenol in Groundwater
Authors: Fontenot K.K. , Bush E.W. , Portier R.J. , Meyer B.A. , Beasley J.S. , Walsh M.M.
Published: August 2020

Cumene and 4-cumylphenol are the primary constituents of concern in a groundwater plume at a chemical facility located in Plaquemine, Louisiana. Phytoremediation, a method that uses plants to remove contaminants from water and soil, was posed as a solution to removing the constituents of concern and creating hydraulic control of the plume. Five tree species, eastern redcedar, bald cypress, black willow, eastern cottonwood, and water oak, were chosen as potential remediators. Eastern redcedar and water oak did not tolerate the saline, contaminated water. Bald cypress, black willow, and eastern cottonwood trees were irrigated with deionized water, deionized water containing 0.5 mg·L−1 (0.5 ppm) cumene and 1 mg·L−1 (1 ppm) 4-cumylphenol as the low concentration, or deionized water containing 1 mg·L−1 (1 ppm) cumene and 4 mg·L−1 (4 ppm) 4-cumylphenol referred to as the high concentration. Both bald cypress and black willow were the best tree species for remediation of the groundwater as they were able to sequester the constituents of concern in their lower root tissue. Mean concentration of 4-cumylphenol detected in bald cypress roots at the end of the study were 1.72 mg·kg−1 in the low concentration water treatment and 1.50 mg·kg−1 in the high concentration water treatment. Mean concentration of 4-cumylphenol detected in black willow roots at the end of the study were 16.58 mg·kg−1 in the low concentration water treatment and 25.65 mg·kg−1 in the high concentration water treatment. Bald cypress was ultimately chosen for full scale planting in the fall of 2008.
Algerian Inuleae tribe species distribution modeling underinfluence of current and future climate conditions
Authors: Tahri Djilali , Elhouiti Fatiha , Ouinten Mohamed , Yousfi Mohamed
Published: August 2020

This study aims to predict the impact of bioclimatic variables in current and future climatic scenarios on the distribution of Inuleae tribe species. Modeling the distribution of 30 species of the Inuleae tribe in Algeria was carried out with a maximum entropy model. Two models with 99 occurrence points were obtained with mean values of Area Under a Curve (AUC) of 0.987±0.01 and 0.971±0.02, reflecting excellent predictive power. Three bioclimatic variables contributed mainly to the first model and four - to the second one with cumulative contributions of 83.8% and 79%, respectively elucidating differences between species of the two major climatic zones in Algeria: the Tell and the Sahara. Two-dimensional niches of Algerian Inuleae species allowed to distinguish these two groups with the distribution of 18 Tell species, characterized by high rainfall (14-18°C, 400-1000 mm) and the other 12 species – distributed in hot and dry environments (17-24°C, 20-200 mm). Modeling the distribution under future conditions showed that habitats of the Saharan region would be much less suitable for these species with a variation in the annual mean temperature increase up to 20% and a decrease in annual precipitation, which could raise to 11 and 15%.
A Study of the Durability of Concrete Reinforced with Hemp Fibers Exposed to External Sulfatic Attack
Authors: Ziane Sami , Khelifa Mohammed-Rissel , Mezhoud Samy
Published: August 2020

The purpose of this paper is to study the durability of concrete reinforced with hemp fibers in the face of external Sulfatic attack. For this purpose, five types of concrete were formulated; three types of concrete reinforced with hemp fibers (HC-0.25, HC-0.5, and HC-1) at 0.25%, 0.5%, and 1 % of hemp fibers in volume, respectively. And two control concretes, being ordinary concrete (OC) and polypropylene fiber reinforced concrete (PC). To assess the sulfatic attacks, the described concrete types underwent two aging protocols: 1) a complete immersion in 12.5 % Sodium Sulfate (Na2SO4) solution, and 2) an accelerated aging protocol consisting of immersion/drying in the same sulfate solution at a temperature of 60°C. The results show that concrete reinforced with 0.25 % of hemp fibers is the optimal amount compared to control concretes in terms of physico-mechanical performance and durability under sulfate attack. This number of fibers could enable the production of green and durable structural concretes based on untreated hemp fibers.
Genetic Characterization of Tunisian Lime Genotypes Using Pomological Traits
Authors: Saddoud Debbabi Olfa , Abdelaali Selma Ben , Bouhlal Rym , Zneidi Sabrine , Abdelaali Nasr Ben , Mars Massaoud
Published: August 2020

Citrus genus includes a wide number of species that have been long cultivated and well adapted in Tunisia. It is represented by small number of plantations and considered as underutilized in Tunisia. Our goal was to genetically characterize Tunisian lime genotypes to obtain data useful for gene conservation and breeding purposes. The survey of genotypes was conducted in the Cap Bon region, where citrus cultivation is the most spread. Sixteen quantitative and 19 qualitative parameters were evaluated. The observed accessions belonged to three different species: Citrus limetta, Citrus latifolia (limes Byrsa), and Citrus limettioides (limes of Palestine) according to Tanaka classification. Principal component analysis confirmed these classifications. Four-cell analysis (FCA) was used to determine the most threatened genotypes. Quantitative traits were evaluated and allowed the discrimination between genotypes. Many quantitative traits of fruit and juice were highly positively and significantly correlated. Phenotypic diversity was determined using Shannon–Wiener diversity index (H’). The highest value of diversity index was observed for both vesicle thickness and thickness of segment walls (H’ = 0.98). Intermediate values were observed for both fruit axis (H’= 0.49) and pulp firmness (H’ = 0.43). However, fruit shape (H’ = 0.24), shape of fruit apex (H’ = 0.24), and vesicle length (H’ = 0.33) presented the lowest values of diversity index. Current findings will be useful to conserve threatened genotypes ex situ and on farm and also will guide strategic conservation on Citrus genetic resources for future breeding programs.
PROPROTOTYPE DESIGN OF WATER LEVEL CONTROL SYSTEM BASED ON PID CONTROLLER IN PLTMH
Authors: Budiastra Nyoman , Pemayun A.A Maharta
Published: August 2020

Abstract— One of the development of technological innovations in the field of control systems in all aspects of life is needed to maintain the stability of the work of a system, PID control to maintain the speed of water flow in the supply pipe in order to maintain the rotating speed of turbines Micro Hydro Power Plants (PLTMH) is very necessary because to maintain the generator rotational speed remains stable. To maintain the stability of the water flow, a sluice gate is needed to regulate the flow of water that comes out of the reservoir to the stockpile, the sluice is called a valve that can be controlled with a microcontroller that will open and close in accordance with the data value of the Water Flow Sensor attached to the pipe. Simulation of Water Flow Sensor with PID control is used to simulate the MHP system with PID control by comparing the output if the PID value is changed.
Entre dois mundos
Authors: Buarque Angela , Baumann Thereza , Barbosa-Guimarães Márcia , Cordeiro Jeanne
Published: August 2020

Entre Dois Mundos se refere à exposição que se encontrava no Museu Nacional, resultado de pesquisas arqueológicas em Araruama, Região dos Lagos, Rio de Janeiro, com reflexões sobre o contato entre os tupinambá e os franceses que, no século XVI, faziam incursões ao litoral, em busca de produtos tropicais. A materialidade encontrada nos sítios atesta a interação entre os grupos e dialoga com a iconografia produzida por cronistas que descreveram aspectos cotidianos e rituais das populações nativas. Na exposição, estavam expostos vasilhames cerâmicos decorados, urnas funerárias, adornos em concha, metais e centenas de miçangas. Esses artefatos apontam para a continuidade dos aspectos socioculturais, interações, influências recíprocas desde o período anterior e após o contato.
LAS NARRATIVAS EN EL AULA, SUPERANDO LA BRECHA EN EL CAMPO DE LAS DIDÁCTICAS
Authors: Olave José Miguel , Sierralta Eloísa Paz , López Nieto Lorena
Published: August 2020

El artículo expone el potencial de las narrativas para la generación de saber pedagógico desde una doble dimensión: como proceso de indagación pedagógica y como experiencia didáctica en el aula. En primer lugar, sitúa las narrativas en el campo de la investigación social y su vinculación con el campo educativo. Posteriormente, muestra la pertinencia del uso de las narrativas en la reflexión didáctica, analizando una experiencia en el aula de un curso de Filosofía propio del programa de estudio para el nivel de cuarto año de enseñanza media. De este modo, el artículo abre una reflexión respecto a la forma en que las narrativas se constituyen en un proceso didáctico, al tiempo en que se devela el qué sucede con los sujetos de esta experiencia, en este caso desde la particularidad de las voces de estudiantes secundarias. El artículo finaliza exponiendo las posibilidades pedagógicas y didácticas de esta propuesta de narrativas en el aula.
LA DIVERSIDAD CULTURAL EN AMÉRICA LATINA. UN PROBLEMA ÉTICO POLÍTICO PARA LA FORMACIÓN Y LA PRODUCCIÓN DE CONOCIMIENTO
Authors: Quintar Estela Beatriz
Published: August 2020

Un proyecto de recuperación de los sujetos es lo que se concibe como tarea de la formación, y en eso una dimensión fundamental es la cultura. Los sistemas educativos en América Latina están históricamente orientados a la homogenización cultural de sus integrantes. Una propuesta que retome la diversidad cultural en los procesos de formación es indispensable desde la perspectiva política de la educación para producir conocimiento histórico.
BECAS, ESCUELA DE VERANO Y MISIONES EDUCACIONALES PARA LA FORMACIÓN DEL PROFESORADO CHILENO Y LA EDUCACIÓN VENEZOLANA (1934 - 1938)
Authors: Uzcátegui Pacheco Ramón
Published: August 2020

En el artículo se analiza parte de la dinámica institucional del magisterio chileno en su esfuerzo por consolidarse en una fuerza pedagógica con proyección internacional. Este proceso se inició desde finales del siglo XIX y se profundizó a comienzo del siglo XX, teniendo proyecciones importantes en la educación latinoamericana, y venezolana, en particular. En el texto se aborda un aspecto de esta relación a partir de las iniciativas institucionales que se gestaron al inicio del siglo XX y que posibilitó la relación pedagógica entre Chile y Venezuela. La estrategia de formación de maestros a partir de becas, escuelas de verano, escuelas de invierno y la puesta en marcha de misiones educacionales favoreció el intercambio entre docentes en la región y proyecto internacionalmente al magisterio chileno, iniciativas liderizadas por profesores y egresados del Instituto Pedagógico de Chile con repercusiones en la educación costarricense, dominicana y venezolana. A partir de revisión documental y de la historiografía educativa chilena y venezolana disponible se recrean algunas expresiones institucionales todas ellas orientadas al fortalecimiento de la educación chilena, y porque no, base para lo que después será una comprensión latinoamericana de los problemas educacionales de la región.
LA CORPORALIDAD EN EL DISPOSITIVO ÁULICO UNIVERSITARIO
Authors: Bonvillani Andrea
Published: August 2020

Este artículo reflexiona sobre la dimensión de la corporalidad en la experiencia de enseñar y aprender en el ámbito universitario.  Aunque relevante en una comprensión integral de las vivencias humanas, la misma no ha sido suficientemente considerada, en especial en el nivel superior-universitario. Recuperando registros de clases realizados por la autora, así como por otros integrantes de una materia de la carrera de Psicología, en la Universidad Nacional de Córdoba (Argentina) y de los propios estudiantes cursantes, a través de un análisis cualitativo, se propone responder a las siguientes preguntas: ¿qué permite poner en visibilidad el dispositivo áulico universitario acerca de la corporalidad de los participantes? Consecuentemente, ¿qué invisibiliza?; ¿qué sucede cuando en la universidad se trabaja desde sensaciones corporales, a partir del encuentro con uno mismo y con los otros, como experiencia que posibilita la construcción de saberes? En conclusión se propone que el dispositivo áulico universitario produce disciplinamientos en la corporalidad de estudiantes y profesores, pero también aloja pliegues donde es posible algún gesto emancipatorio. Este logro depende, en parte, de la escucha de los sentires silenciados.
LAS POLÍTICAS DE EVALUACIÓN Y SUS EFECTOS EN EL QUEHACER DOCENTE: MÁS ALLÁ DE LA ORGANIZACIÓN Y LA GESTIÓN
Authors: Ramírez-Casas del Valle Lorena , Baleriola Escudero Enrique , Sisto Vicente , Aguilera Felipe
Published: August 2020

En las últimas décadas Chile ha llevado a cabo una serie de reformas y leyes centradas en la evaluación del desempeño y rendición de cuentas de los docentes. Uno de los puntos característicos de todas estas leyes, en la línea de las directrices del Nuevo Management Público, es el uso recurrente de instrumentos que concretizan y performan el contenido práctico y cotidiano de esas leyes. El siguiente artículo tiene como propósito reflexionar críticamente en torno a los alcances y efectos de estos instrumentos en el quehacer cotidiano y pedagógico de los docentes, con la consecuente pedagogía que se configura y las perspectivas que quedan fuera del horizonte de posibilidades de acción.
EXPERIENCIAS FORMATIVAS DE EDUCACIÓN INDÍGENA EN COLOMBIA Y CHILE: UN APORTE A LA EDUCACIÓN INTERCULTURAL LATINOAMERICANA
Authors: Calderón Leyton Elia
Published: August 2020

Este artículo se basa en el análisis de la interculturalidad y la Pedagogía intercultural que se han creado en Latinoamérica para dar respuesta a la demanda en educación intercultural, haciendo referencia a los pueblos indígenas y afrodescendientes en Latinoamérica. El objetivo de este artículo es presentar el curso en el programa de formación de profesores indígenas de la Licenciatura en Pedagogía de la Madre Tierra (LPMT) de la Universidad de Antioquia, Colombia y la formación práctica de formación inicial docente en educación básica intercultural de la Universidad Católica de Temuco.  El problema que se discute es la confrontación de saberes y conocimientos de personas pertenecientes a esferas culturales diferentes, en el marco de la educación intercultural en el contexto latinoamericano. Por último, se plantean posibles soluciones para mejorar la educación intercultural y lograr su revitalización.
Regression Analysis Of Inter-Variable Relationships Within Business Canvas Model: Value Proposition, Key Resources, Revenue And Cost Structure With The Cobb Douglass Production Function Approach (Study Case: Basic And Chemical Industries From 2006-2017)
Authors: Gumulya Devanny
Published: August 2020

In the 21st century disruptive era, in order to survive a company must innovate their business model constantly. In 2006 – 2017, the number of finish goods produced by base and chemical industry sector compare to agriculture and consumer goods sector were lower. Thus, this research tries to do regression with simultenous approach by analyzing variabel combined from the business model canvas concept by Osterwalter and Pigneur, 2010 and production function Cobb Douglas. The BMC was filled with financial report from Bloomberg. From the data, only several variables from BMC can be analyzed, the variables are value proposition, key resources, revenue and cost structure. This research also tries to analyze the relation between BMC internal variabel with external variabel from macro economy. The research results are revenue positively influence finish goods, while revenue is positively influenced by cost of good sols and external variabel national GDP. ARIMA forecast is done in static and dynamic model. From the static model founded that, from 2017-2018 BRNA and TPIA increase their finish goods significantly. For the longer prediction 2017 – 2025 a dynamic model is used, founded that all companies will not have significant growth in their finish goods production. The basic and chemical industry’s finish goods still going to be lower than agriculture and consumer goods industry. Concluded that manufacture industry that relates directly to human’s primary needs, the finish goods average will always be higher than basic industry and chemical in which this sector is not directly needed by human.
Keywords: business model canvas; production function cobb douglas; 2sls
Using Cash Flow Ratios To Establish A Manufacturing Bankruptcy Prediction Model
Authors: Veronica M. Sienly , Ida Ida , Winata Vincent Tanu
Published: August 2020

This research has the purpose of forming a bankruptcy prediction model that will occur in manufacturing companies that listed in Indonesia Stock Exchange using the ratioof cash flow because the manufacturing industry plays an important role in a country's economic development. Cash flow ratio and condition of financial difficulties are used as research variables .Non probabilistic sample with the type of purposive sampling is referred to as the method used in sampling at this research, because rather than the number of manufacturing companies used was 92 manufacturing companies.The methodof data analysis in this research uses logistic regression and the results show that cash flow ratios can predict financial distress with operating cash flow margin is most useful in predicting financial difficulty.These findings can make manufacturing companies focus on cash flow ratios to avoid financial distress.
Keywords: cash flow ratios; logistic regression; manufacturing industries; financial distress
Multiple-precision matrix-vector multiplication on graphics processing units
Authors: Isupov Konstantin , Knyazkov Vladimir
Published: August 2020

We are considering a parallel implementation of matrix-vector multiplication (GEMV, Level 2 of the BLAS) for graphics processing units (GPUs) using multiple-precision arithmetic based on the residue number system. In our GEMV implementation, element-wise operations with multiple-precision vectors and matrices consist of several parts, each of which is calculated by a separate CUDA kernel. This feature eliminates branch divergence when performing sequential parts of multiple-precision operations and allows the full utilization of the GPU’s resources. An efficient data structure for storing arrays with multiple-precision entries provides a coalesced access pattern to the GPU global memory. We have performed a rounding error analysis and derived error bounds for the proposed GEMV implementation. Experimental results show the high efficiency of the proposed solution compared to existing high-precision packages deployed on GPU.
Carcinoma de células escamosas em cisto do ducto tireoglosso: relato de caso
Authors: Borges Julliany Queiroz , Viana Caroline Gomes , Rocha Luisa Thainã Pimenta , Prado Tayná Gonçalves , Gonçalves Camila Teles , Almeida Felipe Braga , Tolentino João Vitor Martins , Rocha Rafael Jose Capuchinho , Sousa Paolla Dorneles Ferraz , Dos Anjos Evandro Barbosa
Published: August 2020

Objetivo: Descrever um caso de paciente com Cisto de Ducto Tireoglosso com malignização do tipo carcinoma de células escamosas. Relato de Caso: Paciente com 51 anos de idade, masculino, procurou o serviço de endocrinologia com queixa de massa cervical sem sintomas associados. Foi então solicitado ultrassom cervical, que revelou presença de formação cística de paredes finas, conteúdo homogêneo espesso, em aspecto de grão de areia, localizada na linha média. Aventou-se a hipótese de Cisto de Ducto Tireoglosso, sendo adotada conduta expectante, com ultrassonografias cervicais periódicas. Após aproximadamente dezoito meses, observou-se aumento das dimensões do cisto, sendo então encaminhado ao serviço de Cirurgia de Cabeça e Pescoço. Com base no exame físico e demais exames o diagnóstico de Cisto de Ducto Tireoglosso foi firmado e optado por realização de cirurgia de Sistrunk e envio de material para anatomopatológico. Após análise patológica foi elucidado o diagnóstico de Carcinoma de Células Escamosas de Cisto de Ducto Tireoglosso. Indicou-se então nova abordagem cirúrgica com laringectomia total. Considerações Finais: Sendo o Carcinoma de Células Escamosas de Cisto de Ducto Tireoglosso uma entidade que não apresenta inicialmente sinais clínicos de alarme, deve-se suspeitar de malignidade sempre que houver um caso de Cisto de Ducto Tireoglosso.
The algorithm for diagnosis and management of intracranial hypotension with coma: Report of two cases
Authors: Arai Shintaro , Takai Keisuke , Taniguchi Makoto
Published: August 2020

Background:

Spontaneous intracranial hypotension (SIH) is caused by spontaneous cerebrospinal fluid (CSF) leaks that can be treated in most cases with an epidural blood patch (EBP). However, some patients, who develop severe brain sagging, can neurologically deteriorate, and in occasional instances, which become comatose. Here, with the presentation of two cases, and a review of the literature, we have set guidelines for diagnosing SIH along with recommendations for its management.

Case Description:

We reviewed two cases of SIH. Both patients became comatose due to a CSF leak associated with a tear in the spinal dura diagnosed on myelo-CT studies. As targeted EBP failed to achieve sustained improvement, direct operative repair of the dural tears was warranted (video presentation).

Conclusion:

After reviewing two cases of SIH and the literature, we developed an algorithm for the diagnosis and management of SIH. To avoid deterioration to a comatose status, we recommend the early performance of myelo- CT studies to identify the location of the dural leak, followed by early dural repair.
Biosynthesis of Chlorinated Lactylates in Sphaerospermopsis sp. LEGE 00249
Authors: Abt Kathleen , Castelo-Branco Raquel , Leao Pedro
Published: August 2020

Lactylates are an important group of molecules in the food and cosmetic industries. A series of natural halogenated 1-lactylates – chlorosphaerolactyaltes (1-4) – were recently reported from Sphaerospermopsis sp. LEGE 00249. Here, we identify the cly biosynthetic gene cluster, containing all the necessary functionalities to generate and release the natural lactylates. Using a combination of stable isotope-labeled precursor feeding and bioinformatic analysis, we propose that dodecanoic acid and pyruvate are the key building blocks in the biosynthesis of 1-4. We additionally report minor analogues of these molecules with varying alkyl chains. The discovery of the cly gene cluster paves the way to accessing industrially-relevant lactylates through pathway engineering.
Precise Control of π-electron Magnetism in Metal-free Porphyrins
Authors: Zhao Yan , Jiang Kaiyue , Li Can , Liu Yufeng , Xu Chengyang , Zheng Wenna , Guan Dandan , Li Yaoyi , Zheng Hao , Liu Canhua , Luo Weidong , Jia Jinfeng , zhuang Xiaodong , Wang Shiyong
Published: August 2020

The porphyrin marcocycle can stabilize a set of magnetic metal ions, thus introducing localized net spins near the center. However, it remains illusive but most desirable to introduce delocalized spins in porphyrins with wide implications, for example, for building correlated quantum spins. Here, we demonstrate that metal-free porphyrins host delocalized π-electron magnetism as revealed by scanning probe microscopy and different level of theory calculations. Our results demonstrate that engineering of π-electron topologies introduces spin polarized singlet state and delocalized net spins in metal-free porphyrins. In addition, the π-electron magnetism can be switched on/off via STM manipulation by tunning the interfacial charge transfer. Our results provide an effective way to precisely control the π-electron magnetism in metal-free porphyrins, which can be further extended to design new magnetic functionalities of porphyrin-based architectures.
Onsager Transport Coefficients and Transference Numbers in Polyelectrolyte Solutions and Polymerized Ionic Liquids
Authors: Fong Kara D. , Self Julian , McCloskey Bryan D. , Persson Kristin
Published: August 2020

Electrolytes featuring negatively-charged polymers such as nonaqueous polyelectrolyte solutions and polymerized ionic liquids are currently under investigation as potential high cation transference number (t+) electrolytes for lithium ion batteries. Herein, we use coarse-grained molecular dynamics simulations to characterize the Onsager transport coefficients of polyelectrolyte solutions as a function of chain length and concentration. For all systems studied, we find that the rigorously computed transference number is substantially lower than that approximated by the ideal solution (Nernst-Einstein) equations typically used to characterize these systems due to the presence of strong anion-anion and cation-anion correlations. None of the polyelectrolyte solutions achieve t+ greater than that of the conventional binary salt electrolyte, with some solutions having negative t+. This work demonstrates that the Nernst-Einstein assumption does not provide a physically meaningful estimate of the transference number in these solutions and calls into question the expectation of polyelectrolytes to exhibit high cation transference number.
Factores de riesgo de violencia a la mujer de parte del cónyuge
Authors: Fabián Árias Eugenia , Vilcas Baldeón Luz María , Alberto Bueno Yovana
Published: August 2020

El objetivo del presente trabajo fue realizar una revisión bibliográfica sobre los factores de riesgo de la violencia a la mujer por parte de su cónyuge, considerando que factores de riesgo son característicos o circunstancia que tienen la probabilidad de desarrollar algún efecto y/o consecuencias adversas. Se analizan las investigaciones que se han realizado sobre los factores de riesgo, los resultados de esta revisión permiten concluir que la violencia a la mujer es histórica ha permanecido y aún permanece en gran porcentaje oculta, porque la mayoría no denuncia por temor a sufrir más violencia. Los factores de riesgo para que ocurra la violencia contra la mujer es multifactorial por las características de la dinámica familiar de cada país. Los resultados de los estudios evidencian que los factores de riesgo de la violencia a la mujer se encuentran en el nivel macro estructural; exosistema, y microsistema. Además, se tiene diversas teorías y modelos que explican los factores que están asociados a la violencia contra la mujer.

 

DOI: https://doi.org/10.31876/sl.v3i1.67
Factores asociados al comercio informal en el mercado Ráez Patiño de Huancayo
Authors: Condori Apaza Marisol , Pariona Ccanto Esther , Suasnabar Quispe Soledad , Reyna Arauco Gustavo Alberto
Published: August 2020

Objetivo: analizar los principales factores asociados al comercio informal en el mercado Ráez Patiño, Huancayo, 2018. Método: se recurrió al método científico, y deductivo; el enfoque metodológico fue cuantitativo, investigación de tipo básico, nivel descriptivo y explicativo y diseño no experimental transversal; la muestra estuvo conformada por 185 comerciantes informales de los alrededores del mercado Ráez Patiño, de la cual se recolectó información a través de un cuestionario. Conclusiones: el comercio informal en diversos contextos de Latinoamérica y el Perú, como en Huancayo y específicamente en los alrededores del mercado Ráez Patiño, está asociado sobre todo a factores sociales y económicos; entre los primeros se identificaron: el bajo nivel de instrucción, la migración y el desempleo; entre los segundos: la poca inversión de capital económico, el deseo de lograr independencia económica (en el caso de las mujeres) y la necesidad de colaborar con el ingreso económico familiar.

 

DOI: https://doi.org/10.31876/sl.v4i1.48
La imagen de la juventud en la publicidad televisiva del Perú
Authors: Quinte Rodríguez Silvia Liseti , Alania Contreras Rubén Darío , Flores Rivas Víctor Ricardo
Published: August 2020

La investigación tuvo como objetivo caracterizar la imagen de la juventud mostrada en la publicidad televisiva del Perú, definiendo qué papel se asigna a los jóvenes en las piezas publicitarias de la televisión peruana. El estudio, de tipo básico y diseño descriptivo simple, tomó una muestra de 100 spots publicitarios, emitidos durante los meses de julio, agosto y setiembre de 2019. Se aplicó como instrumento de recolección de datos, la ficha de análisis de contenido de imagen de la juventud, diseñada para la investigación. Se halló que, predominantemente, se muestra a jóvenes de fenotipo caucásico, atlético y que destacan por su atractivo físico, con roles de belleza, cuidado del cuerpo y la propia imagen, teniendo el placer como objetivo principal. Se concluye que la imagen de la juventud en la publicidad televisiva nacional es discriminativa en el fenotipo que representa; superficial y hedonista, en los roles asignados, y homogenizante, en preferencias juveniles.

 

DOI: https://doi.org/10.31876/sl.v4i1.53
Comunicación interna en los socios de un mercado de la Sierra Central del Perú
Authors: Cabrera Vega Arón Orlando , Quijada Farias Pamela Cristina , Alania Contreras Rubén Darío
Published: August 2020

La investigación tuvo como objetivo caracterizar la comunicación interna en los socios del Mercado Ramos Toscano de Huancayo – Perú. El estudio fue de enfoque mixto, tipo básico y diseño descriptivo simple, en la etapa cuantitativa se tuvo una muestra de 110 socios del mercado a quienes se administró un cuestionario de comunicación interna diseñado para la investigación y en la etapa cualitativa se contó como una muestra de 5 socios del mercado a quienes se realizó entrevistas a profundidad. Como resultado, se halló que el nivel de comunicación interna en el Mercado Ramos Toscano es alto (66,4%), predominando canales de comunicación no formales y modos de comunicación espontáneos que posibilitan una la organización eficiente, sobre todo cuando los objetivos son comunes. Se concluyó que la comunicación interna en la unidad de análisis es alta, principalmente debido a la antigüedad de los socios, generando una convivencia que permite una comunicación adecuada, predominantemente no formal, de carácter directo, horizontal, espontánea y potenciada por el respeto a valores del mundo andino como solidaridad y cooperativismo.
Violencia de género desde la perspectiva masculina
Authors: Cristobal Quispe Oscar , Palacios Pérez Poul Jhasstyn
Published: August 2020

La investigación se realizó con el objetivo de conocer la realidad de la violencia de género que experimentan los varones en nuestra sociedad teniendo en cuenta la perspectiva masculina y como principales actores a los varones que sufrieron violencia de género, una realidad silenciosa que amerita un replanteamiento en el ordenamiento jurídico peruano, de tal forma que la problemática de la violencia de género pueda ser abordada adecuadamente. Se utilizó el enfoque metodológico mixto, nivel de investigación explicativa y las técnicas utilizadas fueron la observación, entrevista y la encuesta como unidad de análisis se toma en cuenta a los varones que fueron víctimas de violencia y que llevaron sus casos a las instancias judiciales, se han analizado los expedientes judiciales, teniendo en consideración las concepciones de violencia y género, conjuntamente con valores y conocimientos ordinarios e interpretación a la normativa correspondiente, recogiendo además la perspectiva de los operadores de justicia por medio de una entrevista no estructurada; se concluye que la realidad de la violencia de género que experimentan los varones en nuestra sociedad, constituye un problema casi imperceptible, ya que las víctimas, en su mayoría, callan y/o tienen vergüenza de denunciar. Esta problemática se agrava debido a que, por su condición de género no se ha priorizado ni regulado su protección a nivel jurídico.