scholarly journals Evaluación tecnológica explotativa del motocultor Dongfeng DF 151L en preparación de suelo para sembrar maíz

2020 ◽  
pp. 47
Author(s):  
Byron Leonardo Quimís Guerrido ◽  
Felipe Franco-Plaza ◽  
Carlos Loor-Guerrero ◽  
Víctor Sempertegui-Campi ◽  
Juan Quimís-Pin
Keyword(s):  
High Reliability ◽  
Operating Time ◽  
Observation Area ◽  
Palabras Clave ◽  
Maize Cultivation ◽  
Soil Preparation ◽  
Technological Evaluation ◽  
Productive Time

Exploitative technological evaluation of the Dongfeng DF 151L motor cultivator in soil preparation for sowing maize Resumen La presente investigación se realizó en la “Finca Juanito”, coordenadas 1o19’46’’ LS y 80o35’3’’ LO, cantón Jipijapa, provincia de Manabí, Ecuador.  El objetivo es determinar los índices tecnológicos, explotativos y calidad de trabajo del motocultor marca DONGFENG DF 151L con rotovator en la preparación de suelo para siembra de maíz.  Para determinación de las condiciones del área de observación y evaluación tecnológico-explotativa del motocultor DONGFENG 151L con rotovator, se utilizaron las metodologías de las normas cubanas NC 3447:2003 y NC 3437:2003    respectivamente.  Las propiedades físico - mecánicas y granulometría del suelo, mediante norma AASHTO T-88, se determinaron en laboratorios de INIAP y la UTM.  Los resultados dieron certeza que el suelo es apropiado para el cultivo de maíz, de textura arcilloso - limoso; densidad aparente 1,28 g/cm3; humedad gravimétrica 13%; y resistencia a la penetración de 1,8 MPa, lo cual sugiere que la compactación no es restrictiva y presenta buenas condiciones para el cultivo de maíz; la obstrucción por residuos de cosecha anterior fue 0,21 kg/ha.  Los índices de productividad por hora de tiempo limpio (W01); de tiempo operativo (W02); y de tiempo productivo (W04) registran valores similares de 0,04 ha/h, se consideran aceptables.  Los coeficientes de explotación alcanzaron valores cercanos e iguales a 1,0, se debe a la alta fiabilidad y seguridad técnica del motocultor.  La evaluación tecnológica explotativa del motocultor DONGFENG 151L con rotovator cumple con la exigencia agrotécnica, para el cultivo de maíz.  El ancho; profundidad; y velocidad de trabajo, registraron valores de 0,69 m ± 0,01 m; 14,6 cm ± 1,3 cm; y 1,28 km/h ± 0,06 km/h respectivamente.  Las fracciones de terrones alcanzaron valores de < 2,38 mm - 9,5 mm, adecuados para el cultivo de maíz. Mediante precipitaciones pluviales, el suelo adquirió humedad apropiada, se utilizó la herramienta manual espeque, para siembra directa de la semilla de maíz. Palabras clave: Besanas; calidad de trabajo; gasto de combustible específico; pendiente alta; productividad. Abstract This research was carried out in the "Finca Juanito", coordinates 1o19'46'' LS and 80o35'3'' LO, canton Jipijapa, province of Manabí, Ecuador. The objective is to determine the technological, exploitative and working quality indices of the DONGFENG DF 151L motor cultivator with rotovator in the preparation of soil for maize sowing.  For the determination of the conditions of the observation area and technological-exploitative evaluation of the DONGFENG 151L cultivator with rotovator, the methodologies of the Cuban standards NC 3447:2003 and NC 3437:2003 respectively were used.  The physical - mechanical properties and soil granulometry, by AASHTO T-88, were determined in INIAP and UTM laboratories.  The results gave certainty that the soil is suitable for maize cultivation, of clay - silty texture; bulk density 1,28 g/cm3; gravimetric humidity 13%; and penetration resistance of 1,8 MPa, which suggests that compaction is not restrictive and presents good conditions for the cultivation of maize; obstruction by residue from previous harvest was 0,21 kg/ha. The productivity rates per hour of clean time (W01); of operating time (W02); and of productive time (W04) record similar values of 0,04 ha/h, are considered acceptable. The exploitation coefficients reached values close to and equal to 1,0, due to the high reliability and technical safety of the motocultor. The exploitative technological evaluation of the DONGFENG DF 151L cultivator with rotovator meets the agrotechnical requirement, for the cultivation of maize.  The width; depth; and working speed, recorded values of 0,69 m ± 0,01 m; 14,6 cm ± 1,3 cm; and 1,28 km/h ± 0,06 km/h respectively.  The fractions of clods reached values of < 2,38 mm – 9,5 mm, suitable for maize cultivation.  By means of rainfall, the soil acquired appropriate humidity, and the manual tool was used for direct sowing of the maize seed. Keywords:  Besanas; quality of work; specific fuel consumption; high slope; productivity.

scholarly journals Assessment of the switching time and fluid type influence on the transient quality in hydro-mechanical systems

2021 ◽  
Vol 2131 (2) ◽  
pp. 022058
Author(s):  
A V Osipov ◽  
D N Kurilkin
Keyword(s):  
Power Transmission ◽  
Switching Time ◽  
Operating Time ◽  
Mechanical Power ◽  
Working Fluid ◽  
Fluid Type ◽  
Torque Converters ◽  
Main Factor

Abstract The number of transients in hydro-mechanical power transmissions accounts for a significant portion of the total operating time and has a significant impact on drive economy. The quality of the transients largely depends on their duration and the type of working fluid used. The purpose of the work is to analyze the transients in the hydro-mechanical system, taking into account the effect of the duration of switching processes and the type of working fluid used. Determination of transient parameters in the hydro-mechanical power transmission was performed on the basis of mathematical dependences describing the switching process of two torque converters depending on the duration of the filling and emptying process and the influence of the type of working fluid used. Analysis of the calculated characteristics of transients in hydromechanical power transmissions showed that the main factor in the switching of torque converters, is the combination of filling and emptying processes, depending on the type of working fluid used. The obtained results give grounds to propose recommendations on coordination of filling and emptying processes in order to increase the efficiency of the hydromechanical drive.

scholarly journals The Arabic Version of MELASQoL Scale: Translation, Cultural Adaptation, with Assessment of Reliability and Validity

2021 ◽  
Vol 6 (2) ◽  
pp. 01-08
Author(s):  
Doaa AE Abou-Taleb ◽  
Alaa EA Moubasher ◽  
Ahmed K Ibrahim ◽  
Eman MK Youssef
Keyword(s):  
Cultural Adaptation ◽  
Negative Impact ◽  
High Reliability ◽  
Reliability And Validity ◽  
Severity Index ◽  
Arabic Version ◽  
Significant Negative Impact ◽  
The Impact

Background: Melasma has significant emotional and psychological effects and significant negative impact on patients’ quality of life (QoL). Melasma QoL Scale (MELASQoL) is a specific questionnaire that has been developed to assess the effect of melasma on patient’s QoL. Objective: Translation, cultural adaptation, reliability and validation of melasma specific QoL sale (MELASQoL) into Arabic. Patients and Methods: A total of 65 adult Egyptian female patients with melasma aged ≥18 years old with skin phototypes type III-V were enrolled in this study. Wood’s light was used for determination of the type of melasma either epidermal, dermal or mixed. Melasma severity was assessed by using the melasma area and severity index (MASI) score and the new modified score (mMASI). The impact of melasma on QoL was evaluated using the Arabic version of MELASQoL scale after translation and cultural adaptation according to the WHO guidelines. The questionnaire’s reliability and validity was assessed. Results: The internal consistency for the 10-item of the MELASQoL-A scale was excellent; Intra-class Correlation Coefficient (ICC) = 0.914 and Cronbach’s alpha coefficient (Cronbach α = 0.944) indicating high reliability of the developed Arabic version. There was significant positive correlation between the MELASQoL-A scale and the MASI score (r= 0.41; p= 0.0027), and the mMASI score (r = 0.36; p= 0.0032). Conclusion: The Arabic version of the MELASQoL scale was found to be a reliable and valid measure for evaluating the QoL among Egyptian melasma patients, supporting its use in Arab communities.

scholarly journals Well construction in Eastern Siberia: drilling hazards and their remedies

2019 ◽  
pp. 52-57
Author(s):  
Vasiliy A. Parfiryev ◽  
Nikolay N. Zakirov ◽  
Yuriy V. Vaganov ◽  
Alexandra E. Anashkina ◽  
Victor A. Borisenko
Keyword(s):  
Operating Time ◽  
Oil Well ◽  
Eastern Siberia ◽  
Laboratory Studies ◽  
Reservoir Properties ◽  
Geological Section ◽  
Productive Time

The article is devoted to an analysis of oil well construction at fields in the territory of Eastern Siberia. We give features of the geological section, influencing the quality of oil well construction. Particularly, we describe drilling hazards under production string, which there are in the process of posting the wellbore. Laboratory studies have helped to make function the recipe polysulfur biopolymer mud. This solution will allow increasing productive time due to reduction of repeated and emergency works on elimination of the complications connected with cavern formation, operating time of ledges in the conditions of preservation of reservoir properties.

scholarly journals Evaluación tecnológica-explotativa del conjunto trasplantadora Checchi Magli Unitrium - tractor Deutz Fahr Agrofarm 420-T en el cultivo de tabaco

2019 ◽  
pp. 23
Author(s):  
Adolfo Emilio Ramírez Castro ◽  
Liudmyla Shkiliova
Keyword(s):  
Automated System ◽  
Palabras Clave ◽  
El Sistema ◽  
Subsequent Calculation ◽  
Tobacco Cultivation ◽  
The Cost ◽  
Productive Time ◽  
Technical Safety ◽  
Observation Period

Technological-exploratory evaluation of the unit Checchi Magli Unitrium transplanting - Deutz Fahr Agrofarm 420-T tractor in tobacco cultivation Resumen El cultivo de tabaco requiere un intensivo uso de mano de obra, es una importante fuente de trabajo, ya que en promedio se necesita unas 2200 horas de trabajo por hectárea durante todo el desarrollo del mismo. Por estos antecedentes esta solanácea se considera un cultivo de interés, por su rentabilidad y eficiencia productiva (Flores, 2017). El objetivo de este trabajo es determinar los índices tecnológico-explotativos del conjunto conformado por el tractor Deutz Fahr Agrofarm 420-T y la trasplantadora Checchi Magli Unitrium en labor de siembra de tabaco en la Hacienda Tabacalera Tabaganesha, Cantón Valencia de la provincia de Los Ríos, donde se ha optado por implementar la maquinaria agrícola a labores de cultivo. La transplatadora Checchi Magli Unitrium se adquirió en el año 2017, desconociendo sus índices tecnológico-explotativos en la labor de siembra de tabaco. El método utilizado fue el analítico-sintético y la técnica de cronometraje. Para realizar las observaciones y recopilación de datos sobre los tiempos limpio de trabajo, operativo, productivo, de explotación y posterior cálculo de los coeficientes de explotación, de seguridad técnica, de utilización del tiempo productivo y otros, se los hacía de lunes a miércoles durante los meses de julio a septiembre del año 2017, utilizando las Normas Cubanas 34-37:2003 y 34-47: 2003. Para el procesamiento de los datos se utilizó el sistema automatizado “TECEXP”. Los principales resultados evidencian que la calidad de trabajo realizado por el conjunto tractor Deutz Fahr Agrofarm 420-T (100 hp o 75 kW) y la trasplantadora Checchi Magli Unitrium en la labor de siembra se considera satisfactoria, ya que se cumplió con la siembra estable a 6 cm de profundidad, con una distancia longitudinal entre plantas de 0,35 cm, laborando a una velocidad de 1,45 km/h. La productividad por hora de tiempo explotativo fue de 0,26 ha/h; el coeficiente de utilización del tiempo productivo es igual a 0,77; durante el período de observación no se registraron roturas, lo que determinó que el coeficiente de seguridad técnica alcanzó el valor de 1,0; se registró el consumo de combustible de 7 L/ha. Se concluye que el conjunto tractor-trasplantadora evaluado cumple con las exigencias para la siembra de tabaco, permite disminuir considerablemente la cantidad de trabajadores manuales y abaratar el costo de manos de obra. Palabras clave: Índices tecnológicos-explotativos; siembra; tabaco; productividad. Abstract The objective of this work is to determine the technological-exploitative indices of the set made up of the Deutz Fahr Agrofarm 420-T tractor and the Checchi Magli Unitrium transplanting plant in tobacco sowing at the Hacienda tabacalera Tabaganesha, Cantón Valencia of Los Ríos province, where it has been chosen to implement agricultural machinery for cultivation work. The Checchi Magli Unitrium Transplanter was acquired in 2017, ignoring its technological-exploitative indexes in the work of planting tobacco. The method used was synthetic-analytical and the technique of photo chroming. To make the observations and data collection on clean work, operational time, productive time, exploitation time and subsequent calculation of the operating coefficients, technical safety coefficients, use of productive time and others, were used Cuban Standards 34-37: 2003 and 34-47: 2003. For the processing of the data was used the automated system «TECEXP. The main results show that the quality of work carried out by the Deutz Fahr Agrofarm 420-T tractor unit and the Checchi Magli Unitrium transplanting plant in the sowing work is considered satisfactory, since the stable sowing at 6 cm depth was accomplished, with a longitudinal distance between plants of 0.35 cm, working at a speed of 1.45 km/h. The productivity per hour of exploitative time was 0.26 ha/h; the coefficient of utilization of productive time is equal to 0.77; during the observation period there were no breakages, which determined that the safety factor reached the value of 1.0; the fuel consumption of 7 L/ha was recorded. It´s concluded that the evaluated tractor-transplant set meets the requirements for the sowing of tobacco, it allows to reduce considerably the number of manual workers and lower the cost of labor. Keywords: technological-exploitative indexes; planting; tobacco; productivity.

scholarly journals Medición de la calidad de servicios hoteleros de Manta, Ecuador a través del modelo HOTELQUAL

ECA Sinergia ◽  
2020 ◽  
Vol 11 (2) ◽  
pp. 155
Author(s):  
Alexandra Jacqueline Loor Moreira ◽  
Andrea Viviana Zambrano Barcia ◽  
Isaura Vanessa Peña Vélez ◽  
Johnny Edison Ponce Andrade
Keyword(s):  
Quality Of Service ◽  
Quantitative Method ◽  
Measurement Scale ◽  
Improvement Plan ◽  
Speed Measurement ◽  
Palabras Clave ◽  
The City

  Esta investigación se centra en hoteles y hostales de la ciudad de Manta, Ecuador; para evaluar la calidad del servicio que estos brindan a sus clientes a través de la escala de medición HOTELQUAL con una evaluación de 3 dimensiones (instalaciones, personal y organización), con el fin de que los establecimientos conozcan aciertos y errores para poder retroalimentarse y plantearse un plan de mejoras que contribuya al crecimiento de su empresa. Se utilizó un método cuantitativo, haciendo uso de la escala de likert y se realizó in situ observando y bajo la vivencia del servicio recibido que permitió obtener como resultado que a nivel general la calidad de servicio ofertada por estas empresas cumple con el nivel de satisfacción del cliente, pero existen tres aspectos que presentaron debilidad siendo estos: medición de resolución eficaz de problemas, medición de rapidez de servicios y base de datos para reducir tiempo de registro.   Palabras clave: comportamiento del consumidor; promoción turística; estrategia de marketing; factor de competitividad.   Abstract This research will focus on hotels and hostels in the city of Manta, Ecuador; and will evaluate the quality of service they provide to their customers through the SERVQUAL measurement scale with an evaluation of its 5 dimensions in order to establish know their successes and mistakes to be able to get feedback and consider an improvement plan that contributes to the growth of your company. This study uses a quantitative method, making use of the likert scale for the determination of results. The data was carried out in situ observing and under the experience of the service received, which allowed obtaining as a result that in general the quality of service offered by these companies meets the level of customer satisfaction, but there are three aspects that showed weakness, these being efficient problem solving, speed measurement of services and databases to reduce registration time.   Keywords: consumer behavior; tourism promotion; marketing strategy; competitiveness factor.

scholarly journals Evaluación y Determinación de Estándares de Calidad de la Educación Física en la Enseñanza General Básica

2014 ◽  
pp. 73
Author(s):  
Marcelo González Orb ◽  
Raúl Santana Núñez ◽  
Sergio Guarda Etcheverry
Keyword(s):  
Physical Education ◽  
Education Reform ◽  
Private Schools ◽  
State Of The Art ◽  
Education Administration ◽  
Ministry Of Education ◽  
Palabras Clave ◽  
Municipal Schools

Resumen Estudio descriptivo, transversal exploratorio, orientado a determinar la calidad de la Educación Física ejercida en las unidades educativas. La muestra tomó como base los establecimientos educacionales del Ministerio de Educación de Chile; del total de establecimientos fueron seleccionados aleatoriamente n=44, los que representan al 3,3%, segmentados en colegios Particular Pagados n=6,2 (8%); Municipalizados n=21 (5,2%) y Particular Subvencionados n=17 (2,2%). El instrumento “conocimiento reforma educacional” se aplicó a n=36, profesores, correspondiendo al 78% del total, con un missing de 22%. El instrumento “intereses deportivos” se aplicó a n=4.938 alumnos. El estudio permitió determinar el estado del arte respecto a la calidad de la Educación Física ejercida en las unidades educativas, así como las condiciones bajo las cuales se desarrollan éstas. Palabras clave: Gestión; Calidad; Educación; Educación Física. Evaluation and determination of quality standards for physical education in primary education Abstract Descriptive, transversal and explanatory study targeted at determining the quality of physical education in educational units. The sample included data from educational establishments of the Chilean Ministry of Education; n=44 establishments were selected at random, which represent 3.3% of the total; they disaggregate into n=6.2 (8%) paid private schools, n=21 (5,2%) municipal schools, and n=17 (2,2%) subsidised private schools. The instrument "education reform knowledge" was applied to n=36 teachers, representing 78% of the total, with a missing of 22%. The instrument "sports interests" was applied to N=4938 students. The study determined the state of the art concerning the quality of physical education taught in educational units and the conditions of its development. Key words: Education Administration; Quality; Education; Physical Education.  

Tingkat Pemahaman Kompetensi Guru Pada Mahasiswa Pendidikan Geografi Sebagai Calon Guru Geografi

2020 ◽  
Vol 21 (1) ◽  
pp. 102-117
Author(s):  
Novia Zalmita ◽  
Muhajirah Muhajirah ◽  
Abdul Wahab Abdi
Keyword(s):  
Prospective Teachers ◽  
Prospective Teacher ◽  
Quantitative Description ◽  
Population Data ◽  
Geography Education ◽  
Teacher Competence ◽  
Education Department ◽  
Long Time

One that influences human resource indicators is education. The teacher is a profession as a job of academic specialization in a relatively long time in college. Understanding related to teacher competence is very important to have by a prospective teacher because it can affect the quality of performance as a professional teacher. The teacher's competence is known as pedagogic, professional, social and personality competencies. The issue in this study is how the competency of the teacher of the Department of Geography Education FKIP Unsyiah as a prospective teacher of geography? The purpose of this study was to determine the competence of teachers in the Department of Geography Education FKIP Unsyiah as prospective geography teachers. Quantitative description approach is used in this study to find answers to the issue. The population in this study were students of the Department of Geography Education FKIP Unsyiah class of 2015 and 2016 who had been declared to have passed the Micro Teaching and Magang Kependidikan 3 course totaling 50 people. Because the population is small and can be reached, the determination of the sample using total sampling techniques so that the sample in this study is the whole population. Data collection is done by distributing test questions to respondents. The data was analyzed using the descriptive statistics percentage formula. The results of the study indicate that the level of teacher competence of Geography Education Department students as prospective teachers is in the moderate category, namely as many as 22 respondents (44%). A total of 12 respondents (24%) were in the high category, 15 respondents (30%) were in the low category and 1 respondent (2%) were in the very low category.

INFLUENCE OF HEAT TREATMENT OF MOUNTAIN MASSIVE ON TEMPERATURE MODE OF GEOTHERMAL CIRCULATION SYSTEM

2018 ◽  
pp. 44-50
Author(s):  
Yu. P. Morozov
Keyword(s):  
Heat Transfer ◽  
Operating Time ◽  
Fluid Motion ◽  
Coolant Temperature ◽  
Circulation System ◽  
Thermal Processes ◽  
Temperature Mode ◽  
Heat Influx ◽  
Stationary Heat Transfer

Based on the solution of the problem of non-stationary heat transfer during fluid motion in underground permeable layers, dependence was obtained to determine the operating time of the geothermal circulation system in the regime of constant and falling temperatures. It has been established that for a thickness of the layer H <4 m, the influence of heat influxes at = 0.99 and = 0.5 is practically the same, but for a thickness of the layer H> 5 m, the influence of heat inflows depends significantly on temperature. At a thickness of the permeable formation H> 20 m, the heat transfer at = 0.99 has virtually no effect on the thermal processes in the permeable formation, but at = 0.5 the heat influx, depending on the speed of movement, can be from 50 to 90%. Only at H> 50 m, the effect of heat influx significantly decreases and amounts, depending on the filtration rate, from 50 to 10%. The thermal effect of the rock mass with its thickness of more than 10 m, the distance between the discharge circuit and operation, as well as the speed of the coolant have almost no effect on the determination of the operating time of the GCS in constant temperature mode. During operation of the GCS at a dimensionless coolant temperature = 0.5, the velocity of the coolant is significant. With an increase in the speed of the coolant in two times, the error changes by 1.5 times.

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