Pub Date : 2020-02-28DOI: 10.18180/tecciencia.2019.27.8
Alejandro Urrego
. This document describes the different stages of development need to design, build and characterize a flight data acquisition system for the experimental rocket USB - Rocket I. To do so, some simulated flight con-ditions collected from a computer program, and the manufacturing and as-sembly process of an integrated electronic circuit are presented. As a result, the flight data collected in a horizontal ground displacement and commer-cial flight test are presented with this device.
{"title":"Design and Construction of a Flight Data Acquisition System Adapted to an Experimental Rocket Model","authors":"Alejandro Urrego","doi":"10.18180/tecciencia.2019.27.8","DOIUrl":"https://doi.org/10.18180/tecciencia.2019.27.8","url":null,"abstract":". This document describes the different stages of development need to design, build and characterize a flight data acquisition system for the experimental rocket USB - Rocket I. To do so, some simulated flight con-ditions collected from a computer program, and the manufacturing and as-sembly process of an integrated electronic circuit are presented. As a result, the flight data collected in a horizontal ground displacement and commer-cial flight test are presented with this device.","PeriodicalId":22331,"journal":{"name":"TECCIENCIA","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2020-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48641231","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-02-15DOI: 10.18180/tecciencia.2018.24.24
Luz Adriana Suarez Suarez, W. Aperador
{"title":"Programming of Job Shop Production Systems with Fuzzy Logic","authors":"Luz Adriana Suarez Suarez, W. Aperador","doi":"10.18180/tecciencia.2018.24.24","DOIUrl":"https://doi.org/10.18180/tecciencia.2018.24.24","url":null,"abstract":"","PeriodicalId":22331,"journal":{"name":"TECCIENCIA","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2020-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48192186","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-02-10DOI: 10.18180/tecciencia.2019.27.7
D. Agudelo, P. Lichota
espanolLas fuerzas y los momentos aerodinamicos de las aeronaves se pueden expresar en funcion de la presion dinamica, las dimensiones de la aeronave y las condiciones de vuelo. Son muy importantes para predecir el comportamiento y el rendimiento de la aeronave. Ademas, desempenan un papel importante al pre- decir la respuesta del modelo a los comandos de control. Por estas razones, es importante determinar con precision las caracteristicas aerodinamicas en termi- nos de derivativas de estabilidad y control. Este estudio pretende establecer una metodologia para estimar con precision las derivativas de estabilidad y control a traves de procedimientos de identificacion de sistemas. El modelo de avion Navion de categoria FAR 23 fue utilizado para este proposito. Se implemento un metodo de optimizacion bioinspirado para crear senales de control de entrada optimas para estimular el modelo y obtener una senal de salida con un buen contenido de fre- cuencia que permitiera identificar correctamente el sistema. Se logro determinar que la inclusion de metodos bioinspirados aumento la precision de las estimaciones. El metodo desarrollado se puede utilizar para identificar los parametros de platafor- mas de ala fija de peso y caracteristicas similares. Los resultados se pueden utilizar para el desarrollo de simuladores de vuelo con el proposito de recopilar informa- cion del sistema durante las pruebas de certificacion y para capacitar a los pilotos. espanolAircraft aerodynamic forces and moments can be expressed as a func- tion of the dynamic pressure, aircraft dimensions and flight conditions. They are very important do predict the aircraft behavior and performance. Moreover, they play an important role predicting the model response to control inputs. For these reasons it is important to accurate determine the aerodynamic characteristics in terms of stability and control derivatives. This study presents a methodology to precisely estimate stability and control derivatives through system identification procedure. Navion FAR 23 airplane model was used for this purpose. A bio-inspired optimization method was used to create optimal input control signals to excite the model and obtain an output signal with good frequency content that allowed to properly identify the system. Inclusion of bio-inspired methods increased the accu- racy of the estimates. The method can be used to identify fixed wing platforms of similar characteristics. Results can be used to develop flight simulators to collect system information regarding certification evidences and to train pilots.
飞机的西班牙力和空气动力矩可以根据动压、飞机尺寸和飞行条件来表示。它们对于预测飞机的性能和性能非常重要。此外，它们在预测模型对控制命令的响应方面发挥着重要作用。出于这些原因，准确确定稳定性和控制导数终端的气动特性很重要。本研究旨在建立一种方法，通过系统识别程序准确估计稳定性和控制导数。为此，使用了FAR 23级Navion飞机模型。采用生物激励优化方法创建最优输入控制信号，以刺激模型，并获得具有良好频率含量的输出信号，从而正确识别系统。已经确定，加入生物激励方法可以提高估计的准确性。该方法可用于确定定重机翼的平台参数和类似特征。这些结果可用于开发飞行模拟器，目的是在认证测试期间收集系统信息，并培训飞行员。西班牙飞机空气动力学力和力矩可以表示为动态压力、飞机尺寸和飞行条件的函数。预测飞机的行为和性能非常重要。此外，它们在预测模型对控制输入的响应方面发挥着重要作用。出于这些原因，在稳定性和控制导数方面准确确定空气动力学特性很重要。这项研究提出了一种通过系统识别程序准确估计稳定性和控制导数的方法。Navion Far 23飞机模型用于此目的。采用生物激励优化方法创建最佳输入控制信号，以激励模型并获得具有良好频率内容的输出信号，从而能够正确识别系统。纳入生物激励方法提高了估计的准确性。该方法可用于识别具有类似特征的固定翼平台。结果可用于开发飞行模拟器，收集与认证证据有关的系统信息，并培训飞行员。
{"title":"Implementation of bio-inspired optimization algorithms in the System Identification of a FAR 23 aircraft","authors":"D. Agudelo, P. Lichota","doi":"10.18180/tecciencia.2019.27.7","DOIUrl":"https://doi.org/10.18180/tecciencia.2019.27.7","url":null,"abstract":"espanolLas fuerzas y los momentos aerodinamicos de las aeronaves se pueden expresar en funcion de la presion dinamica, las dimensiones de la aeronave y las condiciones de vuelo. Son muy importantes para predecir el comportamiento y el rendimiento de la aeronave. Ademas, desempenan un papel importante al pre- decir la respuesta del modelo a los comandos de control. Por estas razones, es importante determinar con precision las caracteristicas aerodinamicas en termi- nos de derivativas de estabilidad y control. Este estudio pretende establecer una metodologia para estimar con precision las derivativas de estabilidad y control a traves de procedimientos de identificacion de sistemas. El modelo de avion Navion de categoria FAR 23 fue utilizado para este proposito. Se implemento un metodo de optimizacion bioinspirado para crear senales de control de entrada optimas para estimular el modelo y obtener una senal de salida con un buen contenido de fre- cuencia que permitiera identificar correctamente el sistema. Se logro determinar que la inclusion de metodos bioinspirados aumento la precision de las estimaciones. El metodo desarrollado se puede utilizar para identificar los parametros de platafor- mas de ala fija de peso y caracteristicas similares. Los resultados se pueden utilizar para el desarrollo de simuladores de vuelo con el proposito de recopilar informa- cion del sistema durante las pruebas de certificacion y para capacitar a los pilotos. espanolAircraft aerodynamic forces and moments can be expressed as a func- tion of the dynamic pressure, aircraft dimensions and flight conditions. They are very important do predict the aircraft behavior and performance. Moreover, they play an important role predicting the model response to control inputs. For these reasons it is important to accurate determine the aerodynamic characteristics in terms of stability and control derivatives. This study presents a methodology to precisely estimate stability and control derivatives through system identification procedure. Navion FAR 23 airplane model was used for this purpose. A bio-inspired optimization method was used to create optimal input control signals to excite the model and obtain an output signal with good frequency content that allowed to properly identify the system. Inclusion of bio-inspired methods increased the accu- racy of the estimates. The method can be used to identify fixed wing platforms of similar characteristics. Results can be used to develop flight simulators to collect system information regarding certification evidences and to train pilots.","PeriodicalId":22331,"journal":{"name":"TECCIENCIA","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2020-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41578036","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-12-31DOI: 10.18180/tecciencia.2019.27.5
M. Herrera
espanolEn este documento se realiza la revision sobre diferentes tecnicas de control aplicadas a sistemas de generacion distribuida. Sobre las principales tematicas identificadas se tiene el control de potencia activareactiva, el control de carga-frecuencia y la identificacion y control del funcionamiento en modo de isla de las unidades de generacion. Sobre las diferentes estrategias de control identificadas se tiene: PID, robusto, predictivo y difuso, con aplicaciones en los temas antes citados. Particularmente se aprecian aplicaciones para la interconexion de unidades de generacion y el control del sistema de conversion de energia electrica DC-AC (inversor) EnglishIn this document are revised different control techniques applied to distributed generation systems, including control of active-reactive power, load-frequency control and the identification and control of island mode operation of the generation units, which are the main themes identified. The different control strategies identified are PID, robust, predictive and fuzzy, with applications in the aforementioned subjects. Particularly, applications for the interconnection of generation units and the control of the electric power conversion system DC-AC (inverter) are observed.
本文档回顾了应用于分布式发电系统的不同控制技术。确定的主要主题是有功无功功率控制、负荷频率控制以及发电机组孤岛模式运行的识别和控制。确定了不同的控制策略:PID、鲁棒性、预测性和弥漫性，并在上述主题中应用。特别是应用喜欢对方interconexion一代和系统控制单元electrica conversion能量DC-AC(投资者)EnglishIn this document修订都设有控制技术applied to分布式generation systems,包括《active-reactive power, load-frequency控制与识别and control of operation岛mode of the generation presonus, which are the main组件确定。确定的不同控制策略是PID、稳健、预测性和模糊性，并在相关主题中应用。特别是在发电机组互联和电力转换系统DC-AC(逆变器)控制方面的应用。
{"title":"Interactive Evaluator for Memory in users with Alzheimer Disease","authors":"M. Herrera","doi":"10.18180/tecciencia.2019.27.5","DOIUrl":"https://doi.org/10.18180/tecciencia.2019.27.5","url":null,"abstract":"espanolEn este documento se realiza la revision sobre diferentes tecnicas de control aplicadas a sistemas de generacion distribuida. Sobre las principales tematicas identificadas se tiene el control de potencia activareactiva, el control de carga-frecuencia y la identificacion y control del funcionamiento en modo de isla de las unidades de generacion. Sobre las diferentes estrategias de control identificadas se tiene: PID, robusto, predictivo y difuso, con aplicaciones en los temas antes citados. Particularmente se aprecian aplicaciones para la interconexion de unidades de generacion y el control del sistema de conversion de energia electrica DC-AC (inversor) EnglishIn this document are revised different control techniques applied to distributed generation systems, including control of active-reactive power, load-frequency control and the identification and control of island mode operation of the generation units, which are the main themes identified. The different control strategies identified are PID, robust, predictive and fuzzy, with applications in the aforementioned subjects. Particularly, applications for the interconnection of generation units and the control of the electric power conversion system DC-AC (inverter) are observed.","PeriodicalId":22331,"journal":{"name":"TECCIENCIA","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2019-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42018387","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-12-09DOI: 10.18180/tecciencia.27.6
W. Rodríguez, Anderson A. Rodríguez, M. Mayorga, Javier Bonilla, Mauricio López
In the aviation sector, the use of biofuels has increased worldwide, therefore, this study assesses the environmental impact of these mass-based blends, named BK0, BK10, BK20 and BK30, according to their composition (Biodiesel + Kerosene) and the percentage of mass fraction. The study uses life cycle analysis with the SimaPro software and the Ecoinvent database for Colombia. The stages of cultivation, oil extraction and refining were established for biodiesel, while for the kerosene the stages defined were crude oil extraction and its refining. Results show that the stage with the greatest impact is the cultivation and extraction for both the category of freshwater ecotoxicity, acidification and terrestrial eutrophication
{"title":"Life Cycle Analysis of Biodiesel Blends for Aviation","authors":"W. Rodríguez, Anderson A. Rodríguez, M. Mayorga, Javier Bonilla, Mauricio López","doi":"10.18180/tecciencia.27.6","DOIUrl":"https://doi.org/10.18180/tecciencia.27.6","url":null,"abstract":"In the aviation sector, the use of biofuels has increased worldwide, therefore, this study assesses the environmental impact of these mass-based blends, named BK0, BK10, BK20 and BK30, according to their composition (Biodiesel + Kerosene) and the percentage of mass fraction. The study uses life cycle analysis with the SimaPro software and the Ecoinvent database for Colombia. The stages of cultivation, oil extraction and refining were established for biodiesel, while for the kerosene the stages defined were crude oil extraction and its refining. Results show that the stage with the greatest impact is the cultivation and extraction for both the category of freshwater ecotoxicity, acidification and terrestrial eutrophication","PeriodicalId":22331,"journal":{"name":"TECCIENCIA","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2019-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49024275","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-09-09DOI: 10.18180/TECCIENCIA.2019.26.1
C. Rincón, Hermes Martínez
This work presents a methodology applied to the monitoring of slope stability in a rural area in Manizales, using the hillslope-storage Boussinesq (HSB) partial differential equation. This was applied with theoretical information of geotechnical parameters, such as porosity, hydraulic conductivity, thickness and data obtained from indirect measures such as the angle of the hillslope, width of the hillslope, profile of the hillslope and precipitation. In this work, the HSB equation was solved with the finite differences method by applying the python programming in four days of precipitation. The precipitation was reported by the EMAS meteorological station. The result was the saturation curve and its safety factor for each daily record of precipitation in each one of the scenarios given, when varying depth along the hillslope. This methodology can contribute to the monitoring of hillslopes located in rural areas as long as the values of the geotechnical parameters are adjusted, enabling to add to the efforts aimed at an early warning system for the hazard of landslides.
{"title":"TOOL FOR MONITORING HILLSLOPE STABILITY CONSIDERING PRECIPITATION DATA","authors":"C. Rincón, Hermes Martínez","doi":"10.18180/TECCIENCIA.2019.26.1","DOIUrl":"https://doi.org/10.18180/TECCIENCIA.2019.26.1","url":null,"abstract":"This work presents a methodology applied to the monitoring of slope stability in a rural area in Manizales, using the hillslope-storage Boussinesq (HSB) partial differential equation. This was applied with theoretical information of geotechnical parameters, such as porosity, hydraulic conductivity, thickness and data obtained from indirect measures such as the angle of the hillslope, width of the hillslope, profile of the hillslope and precipitation. In this work, the HSB equation was solved with the finite differences method by applying the python programming in four days of precipitation. The precipitation was reported by the EMAS meteorological station. The result was the saturation curve and its safety factor for each daily record of precipitation in each one of the scenarios given, when varying depth along the hillslope. This methodology can contribute to the monitoring of hillslopes located in rural areas as long as the values of the geotechnical parameters are adjusted, enabling to add to the efforts aimed at an early warning system for the hazard of landslides.","PeriodicalId":22331,"journal":{"name":"TECCIENCIA","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2019-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41553492","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-09-09DOI: 10.18180/TECCIENCIA.2018.24.7
Maria de los Angeles Pinto Calderon, Jennifer Katerine Moreno Calderon, Y. Maldonado, A. Ospino
This work evaluates the possibility of increasing the national and regional competitiveness from the local generation of energy in Berlin – Santander, based on a technical and economic feasibility assessment of a small-scale wind energy generation system. Despite the important growth wind energy in Colombia has acquired over the last years, there is still a very limited number of investigations and projects. For the Andean region of Colombia there is a considerable lack of academic or industrial projects that address this topic. Hence, the importance of the study lies down in the potential explored for an environment that had not yet been addressed and may become determinant for the technological and academic advancement in the wind energy knowledge for the country. The study is conducted from a database provided by the Institute of Hydrology, Meteorology and Environmental Studies (IDEAM) at a meteorological station located in Berlin-Santander. The available wind potential is calculated for the climatic conditions of 2015. Three different Wind Energy Conversion Systems (WECS), 1 kW, 3 kW and 900 kW, are technically compared to determine the best option for the given conditions. Finally, a brief economic evaluation is carried out to determine the economic viability of the project and lay the groundwork for further investigations.
{"title":"Technical and Economic Evaluation of a Small-Scale Wind Power System Located in Berlin, Colombia.","authors":"Maria de los Angeles Pinto Calderon, Jennifer Katerine Moreno Calderon, Y. Maldonado, A. Ospino","doi":"10.18180/TECCIENCIA.2018.24.7","DOIUrl":"https://doi.org/10.18180/TECCIENCIA.2018.24.7","url":null,"abstract":"This work evaluates the possibility of increasing the national and regional competitiveness from the local generation of energy in Berlin – Santander, based on a technical and economic feasibility assessment of a small-scale wind energy generation system. Despite the important growth wind energy in Colombia has acquired over the last years, there is still a very limited number of investigations and projects. For the Andean region of Colombia there is a considerable lack of academic or industrial projects that address this topic. Hence, the importance of the study lies down in the potential explored for an environment that had not yet been addressed and may become determinant for the technological and academic advancement in the wind energy knowledge for the country. The study is conducted from a database provided by the Institute of Hydrology, Meteorology and Environmental Studies (IDEAM) at a meteorological station located in Berlin-Santander. The available wind potential is calculated for the climatic conditions of 2015. Three different Wind Energy Conversion Systems (WECS), 1 kW, 3 kW and 900 kW, are technically compared to determine the best option for the given conditions. Finally, a brief economic evaluation is carried out to determine the economic viability of the project and lay the groundwork for further investigations.","PeriodicalId":22331,"journal":{"name":"TECCIENCIA","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2019-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45769899","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-09-09DOI: 10.18180/TECCIENCIA.2018.24.6
Yeimy Camargo, R. Casas
N-body simulations of the interaction between the Sagittarius dwarf galaxy and the Milky Way are performed to study whether it is possible to reproduce both the bifurcations in the tidal streams and the physical properties of Sagittarius. Both galaxies are simulated as sets of particles (live potentials). The initial structures are formed using GALIC and the gravitational interaction between these galaxies is simulated with gadget-2. Sagittarius initially is simulated as a rotating disk-type galaxy with two components: dark matter halo and stellar disk and the Milky Way is a disk galaxy with three components: dark matter halo, stellar disk and central spheroid. Several angles between the orbital angular momentum and the disc angular momentum in the range 180o ≤ θ ≤ 0o were simulated, showing that, although the position and physical properties of Sagittarius are not reproduced entirely by the remnant, the bifurcations appear clearly when 180o ≤ θ < 90o. -
{"title":"Bifurcation in the tidal streams of Sagittarius: Numerical Simulations","authors":"Yeimy Camargo, R. Casas","doi":"10.18180/TECCIENCIA.2018.24.6","DOIUrl":"https://doi.org/10.18180/TECCIENCIA.2018.24.6","url":null,"abstract":"N-body simulations of the interaction between the Sagittarius dwarf galaxy and the Milky Way are performed to study whether it is possible to reproduce both the bifurcations in the tidal streams and the physical properties of Sagittarius. Both galaxies are simulated as sets of particles (live potentials). The initial structures are formed using GALIC and the gravitational interaction between these galaxies is simulated with gadget-2. Sagittarius initially is simulated as a rotating disk-type galaxy with two components: dark matter halo and stellar disk and the Milky Way is a disk galaxy with three components: dark matter halo, stellar disk and central spheroid. Several angles between the orbital angular momentum and the disc angular momentum in the range 180o ≤ θ ≤ 0o were simulated, showing that, although the position and physical properties of Sagittarius are not reproduced entirely by the remnant, the bifurcations appear clearly when 180o ≤ θ < 90o. -","PeriodicalId":22331,"journal":{"name":"TECCIENCIA","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2019-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44716132","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-09-09DOI: 10.18180/TECCIENCIA.2018.25.4
osman javier Roa, A. Ariza, Hector M. Ramirez, Hermann Leon Rincon
The use of remote sensing images for the characterization of the coastal marine ecosystems requires the prior removal of the atmospheric effects, which can be done in a semi-automated manner, by the use of algorithms based on alternative assumptions contained in the processing tools for different software packages. The main objective of this study was to statistically compare the spectral behavior of the coverages contained in an high-resolution WorldView-2 image atmospherically corrected according to the ATCOR and empirical linear models (ELM), using field spectroradiometry conducted in the insular areas of the archipelago of San Andres and Providence. The ATCOR correction model was applied through the PCI 2015 Geomatics software; regarding the ELM model, the ENVI 5.2 software was used. For the spectral comparison four (4) types of coverage were selected (vegetation, reef formations, beach sand and submerged sandbank), with twenty (20) replicas each, for a total of eighty (80) sampling points distributed in a stratified way in the image. The statistical results showed a linear correlation greater than 0.9 between the reflectance values for each of the bands (Blue, Green, Red and NIR-1) and indicate that both models of the atmospheric correction have a high capacity to eliminate the atmospheric effects present in this type of images. However, there are minor significant differences between the middle quadratic errors in the reflectance values for each band of the corrected images.
{"title":"Comparison of ATCOR Atmospheric and ELM Linear Empirical Correction Models Applied to WorldView-2 Images","authors":"osman javier Roa, A. Ariza, Hector M. Ramirez, Hermann Leon Rincon","doi":"10.18180/TECCIENCIA.2018.25.4","DOIUrl":"https://doi.org/10.18180/TECCIENCIA.2018.25.4","url":null,"abstract":"The use of remote sensing images for the characterization of the coastal marine ecosystems requires the prior removal of the atmospheric effects, which can be done in a semi-automated manner, by the use of algorithms based on alternative assumptions contained in the processing tools for different software packages. The main objective of this study was to statistically compare the spectral behavior of the coverages contained in an high-resolution WorldView-2 image atmospherically corrected according to the ATCOR and empirical linear models (ELM), using field spectroradiometry conducted in the insular areas of the archipelago of San Andres and Providence. The ATCOR correction model was applied through the PCI 2015 Geomatics software; regarding the ELM model, the ENVI 5.2 software was used. For the spectral comparison four (4) types of coverage were selected (vegetation, reef formations, beach sand and submerged sandbank), with twenty (20) replicas each, for a total of eighty (80) sampling points distributed in a stratified way in the image. The statistical results showed a linear correlation greater than 0.9 between the reflectance values for each of the bands (Blue, Green, Red and NIR-1) and indicate that both models of the atmospheric correction have a high capacity to eliminate the atmospheric effects present in this type of images. However, there are minor significant differences between the middle quadratic errors in the reflectance values for each band of the corrected images.","PeriodicalId":22331,"journal":{"name":"TECCIENCIA","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2019-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48329974","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-09-09DOI: 10.18180/TECCIENCIA.2018.25.3
Julián Mauricio Betancourt Portela, Paola Andrea Bautista Duarte, Silvia Narváez Flórez, Juan Pablo Parra Lozano
Chlorothalonil (CHT) is a chlorinated-nitrogen fungicide used in the control of black sigatoka, a disease that affects banana and plantain, has adverse effects on the environment and its metabolites can be toxic. The CHT has been the object of several studies related to its behavior and degradation in the environment; however, few works have been developed in tropical areas, such as the case of the banana zone of Magdalena - Colombia. In addition, it is unknown if the microbial diversity existing in these soils can transform compounds such as CHT, thus these microorganisms can be the basis for the implementation of remediation strategies based on bioaugmentation. In this sense, the present study aims to evaluate the degradation of CHT in soils of a tropical coastal zone, under conditions of natural attenuation and bioaugmentation with native microorganisms. For this purpose, microorganisms capable of growing with CHT as their sole carbon source (10.8 mg.L-1) and tolerating a concentration up to 25 mg.L-1 were isolated and selected from soils in the Magdalena-Colombia banana zone. Subsequently, CHT degradation tests (2000 ng.g-1) were performed on experimental plots, with bioaugmentation of native microorganisms and natural attenuation during 35 days, evaluating the growth of microbial populations and the degradation of CHT by gas chromatography associated with a mass spectrometry detector (GC/MS). Because of the microbial selection process, 8 morphotypes were obtained with the ability to grow in CHT as the sole carbon source and tolerate concentrations up to 25 g.L-1. The isolates were identified by sequencing the 16S rDNA gene as belonging to the genera Enterobacter, Klebsiella, Pseudomonas and Citrobacter. The CHT degradation tests showed that under bioaugmentation conditions with the native microorganisms selected in the study, a 100% reduction was achieved after 21 days; while under natural attenuation conditions after 35 days the degradation reached values of 98.5%. The application of bioaugmentation of selected and enhanced bacteria increased the rate of pesticide degradation by ~2.5 times, reducing the half-life from 6.2 to 2.5 days. The results demonstrated the effectiveness of the bioaugmentation treatment and that the selected consortium may be useful for bioremediation of banana crops soils contaminated with the fungicide.
百菌清(CHT)是一种氯化氮杀菌剂，用于控制黑叶斑病，一种影响香蕉和大蕉的疾病，对环境有不利影响，其代谢产物可能有毒。CHT在环境中的行为和退化已经成为几项研究的对象;然而，在热带地区开展的工作很少，例如哥伦比亚马格达莱纳香蕉区。此外，尚不清楚这些土壤中存在的微生物多样性是否可以转化CHT等化合物，因此这些微生物可以作为实施基于生物增强的修复策略的基础。从这个意义上说，本研究旨在评估热带沿海地区土壤中CHT在自然衰减和天然微生物生物增强条件下的降解情况。为此目的，微生物能够以CHT作为其唯一的碳源(10.8 mg. l -1)生长，并耐受高达25 mg的浓度。L-1是从马格达莱纳-哥伦比亚香蕉区土壤中分离和选择的。随后，在试验田进行了CHT降解试验(2000 ng.g-1)，在35天内对本地微生物进行生物增强和自然衰减，通过气相色谱联用质谱检测器(GC/MS)评估微生物种群的生长和CHT的降解。由于微生物选择过程，获得了8种形态，它们能够在CHT作为唯一碳源中生长，并且耐受浓度高达25 g.L-1。经16S rDNA基因测序，分离菌属分别为肠杆菌属、克雷伯氏菌属、假单胞菌属和柠檬酸杆菌属。CHT降解试验表明，在本研究选择的原生微生物的生物增强条件下，21天后可达到100%的降解;在自然衰减条件下，35 d后降解率达到98.5%。经筛选和强化菌的生物强化处理，农药降解率提高了2.5倍，半衰期由6.2天减少到2.5天。结果表明生物强化处理的有效性，所选菌群可用于香蕉作物土壤被杀菌剂污染的生物修复。
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