bluuebunny/crossref_metadata_2025_split huggingface dataset:
Blood biomarkers of common toad Rhinella arenarum following chlorpyrifos dermal exposure
Authors: Lajmanovich Rafael C. , Peltzer Paola M. , Attademo Andrés M. , Colussi Carlina L. , Martinuzzi Candela S. 
Published: November 2019

Abstract
Chlorpyrifos (CPF) is a broad spectrum pesticide commonly used for insect control, has great affinity for lipids and is thus a potential for bioaccumulation in aquatic organisms. The aim of this study was to evaluate the toxicity of CPF using the common toad Rhinella arenarum via dermal uptake in plastic bucket to simulate their natural exposition in ponds. R. arenarum toads were exposed individually to solutions containing a nominal concentration of a commercial formulation of CPF insecticide (5 and 10 mg/L). Different enzyme biomarkers (BChE: butyrylcholinesterase, CbE: carboxylesterase, and CAT: catalase) were measured in blood tissue after exposition. The capacity of pyridine-2-aldoxime methochloride (2-PAM) to reverse OP-inhibited plasma BChE and the ratio of heterophils and lymphocytes (H/L) as hematological indicators of stress were also determined. The normal values of plasma B-sterases (BChE and CbE) were highly inhibited (until ≈ 70%) in toads 48 h after exposure to CPF. The results indicate that 2-PAM produced BChE reactivation as well. The activity of CAT was also inducted for dermal exposure at more than double of that in the control toads (CPF; 5 mg/L). H/L ratios did not reveal a significantly increased stress. The study suggests that CPF via dermal uptake induced neurotoxicity and oxidative stress in the common toad R. areanum. Thus, some blood biomarkers employed in our study (i.e. BChE, CbE, 2-PAM, and CAT) might be used as predictors in health and ecological risk assessment of amphibian populations exposed to CPF.
Drilling and bolting rigs operator support using FGS (Feeder Guiding System) and remote control
Authors: Sarecki Łukasz , Ostapow Lesław , Ławicki Piotr , Mendyka Paweł 
Published: November 2019

Abstract
The article presents the assumptions and main functionalities of two operator support systems – the FGS (Feeder Guiding System) and the remote control system of a drilling or bolting rig. Both of these systems greatly facilitate the work of an operator of a self-propelled mining vehicle in the conditions of an underground metal ore mine. The first of the described system allows for real-time control of the current position of the mining boom and facilitates the drilling of blast holes according to a predetermined drilling pattern. The second of the systems – a remote control system – is used especially in conditions of unstable rock mass or in the case of work in particularly difficult operating conditions, where it is advisable to limit the presence of the crew from the face-up to the necessary minimum. The intensity of these vibrations was related to the conditions of the cutting process.
Next generation technology for utilization of alumina rich iron ore tailings in India
Authors: Mukopadhyay Sudipta , Periyasamy Muthaimanoj 
Published: November 2019

Abstract
Accumulation of low-grade iron ore tailings (IOTs) generated during the processing of high-grade iron ore has become a great threat to environment. Although wide range of research works has carried out to recover the iron values from the IOTs, but the solid recovery value has limited to ca. 50% in Indian context. In order to attain a maximum iron recovery and to utilize these solid wastes for future needs, an attention has shed on the topics of hydrometallurgy and applied nanomaterial synthesis from IOTs. Iron containing nanoparticles (ICNs) have huge potential in environmental and energy related applications. A wide range of synthesis methods has developed to produce ICNs from the mine waste. It is evident from the recent research works that converting waste materials into value added products are gaining more attentions. Objective of this review is to analyse the green synthesis routes to prepare ICNs from mine waste, starting from the physio chemical identification of waste material followed by discussion on various methods of ICNs synthesis routes from mine waste. It includes selective leaching method. Finally, the use of ICNs for environmental application had discussed in brief
Ageing Process of Hydraulic Oil in Single-Bucket Excavators in Rock Mining
Authors: Władzielczyk Krzysztof , Kipczak Piotr 
Published: November 2019

Abstract
The paper presents the problem of ageing processes of hydraulic oils when used in single-bucket excavators in mining of rock raw materials. Working parameters of these excavators are specific, particularly when a hydraulic hammer is mounted in place of the working bucket, therefore the course of the oil degradation process and the change times should be precisely determined as full functionality of hydraulic systems of excavators must be maintained and the wear of individual components of these systems should be reduced. Research on oil ageing processes has been carried out for excavators from various manufacturers that have operated in mines of rock raw materials of various raw material extraction quantities. The methodology adopted for testing the ageing processes of oils in excavators allowed to obtain a number of results that question the hitherto applied criteria for quality assessment of used oils in relation to the time of their actual use in hydraulic systems of excavators, as well as the time of change of such oils.
The new method for assessing rock abrasivity in terms of wear of conical picks
Authors: Mucha Kamil 
Published: November 2019

Abstract
During the exploitation of mineral raw materials, a cutting tool is an element that is directly in contact with the unmined stone being cut. The most commonly used cutting tools include conical picks. The increasing pressure to reduce mining costs causes an increasing demand for affordable and reliable ways to increase the reliability of mining machines. Abrasive wear is the most common process affecting the wear of shearer picks, hence a good and simple laboratory method for assessing rocks abrasivity is needed. The new method was developed in the aspect of selection of conical picks with appropriate protection of the pick working part, increasing its durability. The method involves the assessment of mass abrasive wear of a standard steel pin and rock sample, and the determination of the abrasivity index Wz of the tested rock, as the ratio of the mass loss of the steel pin to the mass loss of the rock sample. The article presents the procedure of conducting tests, construction of a laboratory test stand and the use of the developed method to assess the abrasivity of gangue rocks occurring in the currently cut tunnel excavations of Polish hard coal mines.
Impact of selected parameters on the loading process with cutting screw heads
Authors: Wydro Tomasz 
Published: November 2019

Abstract
The article presents the influence of selected constructional and kinematic parameters of cutting screw heads on the loading process. The loading process is often referred to as an auxiliary process, because in the entire operation of the head the cutting process is considered dominant. Proper determination of the relationship between the cutting process and the loading process allows to understand how individual constructional and kinematic parameters of cutting heads and the cutting machine on which they are installed have an impact on each other. This knowledge gives potential users an opportunity to determine a reason for the lack of effective loading in the working conditions of a given wall. Besides construction and kinematic parameters, shielded loaders also have an impact on the loading process. The use of a shielded loader allows for improving the efficiency of the loading process, i.e. increasing the percentage of output loaded in the whole of the output transferred by the head.
The history of mining and metallurgy of metal ores in upper Silesia preserved in metallurgical waste dumps
Authors: Jonczy Iwona , Stawowiak Michał 
Published: November 2019

Abstract
The history of mining and metallurgy in Upper Silesia dates back to the early Middle Ages. Initially, appearing on the surface, calamine, i.e. oxidized zinc-lead ores, and limonite – iron ore were used. The development of mining technology allowed for exploitation of ore deposits at greater depths. It contributed to the intensive development of industry at the turn of the 19th and 20th centuries. At that time, one of the most important industrial settlements was today's Ruda Śląska. In its area, apart from hard coal mines, there were several forges processing locally exploited zinc, lead and iron ore. The testimony of the former mining and metallurgy, among others, is the dump, which is a remnant of the Hugo zinc smelter (1812-1932). Mineralogical and chemical analyzes of waste material collected on the dumping ground provide a lot of interesting information about the processed raw material.
Opportunities of re-establishing underground mining in the borsod coal basin in north-eastern Hungary
Authors: Molnár József , Debreczeni Ákos , Tompa Richárd 
Published: November 2019

Abstract
Numerous underground coal mines were in operation in the Borsod coal basin in northeastern part of Hungary until the beginning of this century. The main area of utilization of the mined out coal beside power and heat generation was supplying households with fuel mostly for heating. In the beginning of the 1990ies the power plants in question were shut down for economic, environmental and technical reasons. Consequently all the mines were closed no later than 2004 and thousands of miners lost their jobs. A new perspective of coal mining can be enabled by other ways of utilization of coal, e.g. coal chemistry, etc. Safe and modern equipment and technology enabling high output, clean coal, furthermore high rate of yield are targeted. Opportunity of sustainable underground coal mining in the north-eastern part of Hungary is discussed in the paper. Analysis of the properties of coal deposits using three-dimensional (3D) modelling are used for considering opportunities of new mining operations. Models are being developed.
Green energy from a hybrid PV panels and wind turbine farm in Lebanon
Authors: Nesser Bassel I. , Soliman Mohamed Hassan , Pytel Krzysztof 
Published: November 2019

Abstract
The publication presents the results of analysis of green energy from a hybrid PV panels and wind turbine farm use in Lebanon. Electricity is one of the most critical problems in Lebanon. This publication presents an effective solution to this issue. It deals with the generation of green environment friendly electricity from photovoltaic (PV) panels and wind turbine. The genuine idea consists of placing these panels and turbines at the middle of the coastal highway since it is considered as a free land. The produced energy is fed directly to the off gird after being inverted using appropriate devices. The middle of the highway from Tyre to Sidon is considered to apply this research. The actual design consists of 15222 PV panels placed in pairs on a steel chassis among the entire 27300 m coastal distance, 2 meters wide and 7610 vertical axis wind turbines placed at a distance of 0.9 m away from each pair of PV panels. The total energy produced by the PV system is estimated to 7.4 GWh/y and 3.1 GWh/y at an average wind velocity of 4.04 m/s. In addition to its benefit from a free land, the produced energy is environment friendly since there is no carbon dioxide emission.
Areas of industrial damages in upper Silesian industrial region versus recultivation or revitalization ?
Authors: Falencka-Jabłońska Małgorzata 
Published: November 2019

Abstract
Areas of industrial damages require elaborating efficient methods of reclamation and revitalization. A region of Poland, where process of degradation is particularly visible is Upper Silesian Industrial Region. Areas in the zone of many-years influence of Huta “Miasteczko Śląskie” are characterized by norm-exceeding concentration of heavy metals. The area in its direct surrounding was defined as industriogeneous desert. In 2017 on three designated testing grounds with diversified degree of contamination (see: map) of joint area of 1.5 ha, planted were jointly 6550 seedlings of chosen species of trees and bushes which were likely to survive in those conditions. In the first vegetative season, despite extremely long-lasting drought and high temperatures, the seedlings showed high survivability. It amounted 82% on industriogeneous desert (testing ground C) and 90-95% on forest testing grounds (A and B). Maples stood out among other trees with proper development and condition. The highest seedlings, especially mountain ash, birch and European red elder already in August had burnt top shoots and numerous necroses on leaves. Introduction of plants – hyperaccumulators of heavy metals, especially on industriogeneous desert will influence positively on condition and development of seedlings in future vegetative seasons.
Numerical modeling of vertical axis wind turbine with air guides
Authors: Kołodziejczyk Krzysztof , Ptak Radosław , Korman Jakub 
Published: November 2019

Abstract
Currently, obtaining energy from renewable sources, as never before, it has become one of the most important areas, but at the same time challenges in human activities. This is the effect of many factors simultaneously, including because of the media trumpeted the greenhouse effect, the necessity of reducing CO2 emissions, shrinking natural resources, and thus the desire to protect their welfare including conservation (including natural resources) for future generations. The paper presents the results of preliminary numerical analyzes of work for vertical axis wind turbines equipped with air guides. The carried out analyzes indicate the potential possibility of using this type of construction in practice. The obtained power factor value is higher than in classic wind turbines with a vertical axis. The conducted analyzes also indicate the possibility of optimizing the proposed constructional solution in order to increase efficiency of obtaining energy from the wind.
Apuntes sobre procesos socioculturales y enseñanza de la literatura en América Latina entre 1940-1990
Authors: Torres William Fernando 
Published: November 2019

1. Dependencia y urbanización (1940-1960)
En los avatares de la Guerra Civil Española, la II Guerra Mundial y la Guerra Fría, los países de América Latina asistieron al acontecer internacional siempre en curiosos papeles marginales: en la primera, aportaron militantes para la causa republicana y recibieron perseguidos políticos y emigrantes; en la segunda, proveyeron de ciertas materias primas a los países aliados y, de manera tímida, le declararon la guerra al Eje cuando Estados Unidos, por intermedio de la Unión Panamericana, sugirió la conveniencia de esa actitud; en la tercera, algún país aportó soldados para enfrentar al comunismo en Corea.
Estos papeles marginales permiten inferir algunos de los procesos políticos y económicos que vivía el continente: brotes de republicanismo y socialismo, por un lado, y dependencia económica y alianza ideológica militar con Estados Unidos, por otro, luego de décadas de sometimiento al capital inglés.
En política, las anteriores circunstancias se advierten en las formas de gobierno imperantes en las diferentes naciones: en unas, endebles democracias, en otras viejas dictaduras. En economía, en ambas se desarrollaban procesos preindustriales o en tránsito hacia la industria liviana: en los campos, la depreciación de los monocultivos, en las ciudades, el crecimiento de pequeñas industrias. Y encima de todo, la presencia del capital extranjero —en particular norteamericano— que quería sacar buenos dividendos de tierras aptas, materias primas y mano de obra barata y leyes y autoridades complacientes (1).
Proyectos pedagógicos
Authors: Vanegas Rubio Luis Evelio 
Published: November 2019

A través del Comité de Práctica Docente se encuentran en estudio dos grandes proyectos —dependientes entre sí— y cuya realización conllevaría cambios fundamentales en la ejecución de la práctica docente en todos los programas de la Facultad.El primer proyecto tiene que ver con la creación de un colegio que sea el centro de Aplicación Pedagógica de la Facultad. El segundo es una consecuencia directa y se trata de la necesidad de adecuar el reglamento de práctica para poder cumplir de manera óptima con el compromiso que se adquiera con el citado colegio.El origen de este proyecto de crear un colegio para que sea el Centro de Aplicación Pedagógica, surge de la solicitud que los profesores de la jomada de la tarde de la Escuela Agustín Codazzi (barrio Timanco) hicieron a la Universidad para que ésta enviara practicantes y así poder ellos ofrecer los grados 6o, 7o, 8o. y 9o. Se iniciaron los contactos con visitas al plantel y reuniones con directivos y profesores junto con el Jefe de Núcleo, consultas a la Secretaría de Educación y reuniones con participación de representantes del profesorado del colegio, el Decano de la Facultad de Educación y el suscrito como representantes de la Universidad Surcolombiana.
Seminario permanente sobre Epistemología e Historia de la Matemática
Authors: Gutiérrez Hoyos Hernando 
Published: November 2019

La mayor parte (por no hacer afirmaciones generalizantes) de los programas para formación de licenciados en Ciencias exactas naturales adolecen de asignaturas o actividades que "doten " a sus estudiantes de algunos elementos fundamentales para proveerse de una idea clara (la cual debe profundizarse) acerca de la naturaleza y el significado de los "objetos"sobre los cuales actúa la disciplina científica que constituye su campo básico de formación al igual que los métodos mediante los cuales se elaboran sus conceptos, se construyen sus conocimientos y la manera como se integran éstos (conceptos y conocimientos) para constituir un cuerpo de doctrina coherente que los identifique como ciencia.En nuestra facultad de Educación y particularmente en el programa de matemáticas y física tal es la situación que se presenta, por tal motivo, y con la intención de "llenar" este vacío, nos hemos propuesto la tarea de estudiar la naturaleza del conocimiento matemático teniendo en cuenta (desde una perspectiva histórica y epistemológica) la formación y construcción tanto de los conceptos básicos como del conocimiento matemático en general al igual que la estructura organizativa de la misma.
La Facultad de Educación Febrero 1991-Febrero 1995
Authors: Paideia Surcolombiana Revista 
Published: November 2019

Inicia este período con el reto de la organización y realización del VIII Encuentro de Facultades de Educación del suroccidente colombiano, realizado entre el 29 y el 31 de marzo de 1991; al cual asistieron cerca de cien representantes de Facultades de Educación y de Instituciones formadoras de maestros, quienes elogiaron la buena organización y la seriedad de sus conclusiones, reconociendo el cálido afecto y la esmerada atención recibida durante su permanencia en la Universidad.La Facultad de Educación orientó la elaboración de un Plan de Desarrollo, a partir de un proceso participativo y que tenía como fin propiciar propuestas curriculares y un modelo pedagógico que respondiera a las exigencias actuales de la realidad regional y nacional; presentándose en esos momentos los primeros proyectos de reformas a las Facultades de Educación; proyectos liderados por el ICFES, como también la conformación de las primeras comisiones institucionales con el fin de trabajar una propuesta de reestructuración académico-administrativa de la Universidad Surcolombiana; estos principios de cambios a nivel nacional e institucional, llevó a la Facultad a detenerse en su plan de desarrollo, a la espera de las directrices trazadas, tanto a nivel nacional como institucional.
Proyectos educativos institucionales P.E.I.
Authors: Losada Pérez Fabio 
Published: November 2019

En los P.E.I. se deben retomar las experiencias de las instituciones y de la misma comunidad; de esta forma pretendemos vincular las experiencias culturalmente organizadas con las actividades cognitivas, especialmente en la reorganización de los currículos y la nueva organización social de la escuela creando una nueva cultura escolar, partiendo de la interdependencia* de la cultura, la ecología y las circunstancias históricas, organizan-do acciones equilibrantes que se constituyan en actos de inteligencia los cuales implican el desarrollo de ciertas competencias y la ejecución de ciertos dominios.Uno de los objetivos esenciales de los Proyectos Educativos Institucionales P.E.I., interpretando el espíritu de la Ley General de Educación; es aprovechar la experiencia de todos los agentes educativos para que tengan la posibilidad de reconocer, construir y ejercer el conjunto de competencias en su contexto cultural en la elabo-ración de los Proyectos Educativos creando una nueva organización social en la escuela, con la participación de todos y a la vez que responda a las necesidades del medio.Con la elaboración de los P.E.I- por parte de las instituciones se espera que éstas construyan sus propios currículos haciendo que las habilidades cognitivas adquieran un valor adaptativo a las situaciones concretas procesando la información de la realidad; para ello es importante considerar la relación entre lenguaje y cognición:; el lenguaje y el sistema sociocultural, conscientes de que el lenguaje en el contexto de la cultura tiene relaciones estrechas con los modos en que los sujetos construyen una realidad social.
“Indagación y cuestionamiento: herramientas clave para el aprendizaje”
Authors: Sánchez Ruiz Claudia Pilar 
Published: November 2019

Las Instituciones Educativas desde la Educación de Básica Primaria tienen la responsabilidad de formar a sus estudiantes para que comprendan y transformen sus conocimientos en verdaderos aprendizajes. El acompañamiento de docentes, debe estar orientado a establecer una conexión entre el currículo y la realidad, por lo que se puede tomar el desarrollo de la cultura investigativa como eje transversal del conocimiento, las estrategias didácticas que implementan en sus prácticas pedagógicas deben responder a necesidades específicas, fundamentándose en flexibilidad y adaptabilidad a cualquier grado y área del conocimiento, así como a cualquier contexto educativo.
Para ello, se aborda el problema de investigación que permite establecer elementos para identificar las estrategias que emplean los docentes para fomentar y desarrollar la cultura investigativa de los estudiantes del grado tercero de educación básica primaria del Colombus American School del municipio de Rivera (Huila), tomando como diag- nóstico las PP de los docentes de las áreas de Lengua Castellana, Ciencias Sociales, Ciencias Naturales y Matemáticas. Posteriormente se describen los escenarios donde se llevó a cabo el estudio, los antecedentes investigativos, los objetivos que orientaron la investigación y su respectiva metodología así como los resultados obtenidos.
Las habilidades investigativas, vistas como herramientas para el mejoramiento del des- empeño estudiantil, constituyen la base metodológica para llegar a una cultura investi- gativa contextualizada, contribuyendo al fortalecimiento del espíritu investigativo de los educandos, los cuales desarrollan sus competencias científicas mediante la aplicación de procesos pedagógicos inherentes a las prácticas de los docentes en el aula.