Object-Based Greenhouse Mapping Using Very High Resolution Satellite Data and Landsat 8 Time Series

Greenhouse mapping through remote sensing has received extensive attention over the last decades. In this article, the innovative goal relies on mapping greenhouses through the combined use of very high resolution satellite data (WorldView-2) and Landsat 8 Operational Land Imager (OLI) time series within a context of an object-based image analysis (OBIA) and decision tree classification. Thus, WorldView-2 was mainly used to segment the study area focusing on individual greenhouses. Basic spectral information, spectral and vegetation indices, textural features, seasonal statistics and a spectral metric (Moment Distance Index, MDI) derived from Landsat 8 time series and/or WorldView-2 imagery were computed on previously segmented image objects. In order to test its temporal stability, the same approach was applied for two different years, 2014 and 2015. In both years, MDI was pointed out as the most important feature to detect greenhouses. Moreover, the threshold value of this spectral metric turned to be extremely stable for both Landsat 8 and WorldView-2 imagery. A simple decision tree always using the same threshold values for features from Landsat 8 time series and WorldView-2 was finally proposed. Overall accuracies of 93.0% and 93.3% and kappa coefficients of 0.856 and 0.861 were attained for 2014 and 2015 datasets, respectively

Spreadsheet as a didactic tool to teach and learn financial math

In this document we propose a methodology to teach financial mathematics, using a spreadsheet as a didactic tool. We describe the traditional education process in a specific topic of mathematics, “debt restructuring and modeling with equivalent-equation” from the theoretical explanation to design a financial simulator programmed in a spreadsheet. After this, the result will be verified and validated by the designed software.TIC, Financial mathematics, teaching-learning process, financial tools.

Never retreat, never surrender: The bargaining power of commitment in the Hawk-Dove game

This paper studies experimentally the conditions that improve bargaining power using threats in a negotiation process. Following Schelling’s (1960) ideas we choose the hawk-dove game because is the simplest negotiation environment with inequity distribution in equilibrium. The analysis is focused on three essential elements of commitment: the possibility of a player to announce his own actions, the credibility of these messages and the experience acquired in the negotiation process. The empirical evidence shows that, in the first period, subjects do not realize the bargaining power of commitment. When the game is repeated and experience increases, subjects gradually understand the advantages of a threat, turning the payoffs into their favor. Credibility is also relevant for the relation, if subjects can choose their message, it is common to find strategic liars, and their rivals punish this behavior.Credible threats, negotiation, experiments

Criminal Justice Systems in Europe. A cross-national quantitative analysis

In the last years, the Crime Observatory of the University of Malaga has analysed police records on criminal activity, has also carried out several crime victims surveys in Spain and has worked on a detailed analysis of the prison system and its connection to the prison policy. This year´s report focuses on the Criminal Justice System, one of the big official data providers, to gather, organize and interpret a great deal of quantitative data from 2000 to 2011. Such longitudinal scrutiny offers data related to public opinion about criminal courts, the quality of criminal justice, its resources, the amount of criminal cases managed on each court, a user´s profile, etc. On this presentation, we´ll concentrate on a comparison of the European countries that constitutes the first chapter of the Report and aims to offer a proper context to the rest of it. Such comparison will explain the national differences in terms of the public budget allocated to courts, legal aid, court fees, incoming criminal cases, length of procedures, clearance rate, as well as homicide, rape, serious assault and robbery convictions, etc. Our aim will be to offer an interesting cross-national analysis of such topics that will provide a reference point from which to debate the national policies related to the Criminal Justice System in the European Countries.Instituto Andaluz Interuniversitario de Criminología. Sección de Málag

El enfoque de género en el derecho a la vivienda

Treball final de Màster Universitari en Igualtat i Gènere en l'Àmbit Públic i Privat. Codi: SRM042. Curs acadèmic 2015-2016El presente trabajo pretende llevar a cabo una reflexión sobre el derecho a una vivienda adecuada desde la perspectiva de género, con el objetivo de mostrar de qué manera las normas jurídicas que regulan este derecho integran, o bien ignora, el mencionado enfoque de género. El derecho a una vivienda adecuada se planteará desde la óptica de los Derechos Humanos, tomando como punto de referencia el Pacto Internacional de Derechos Económicos, Sociales y culturales (PIDESC. Los conceptos de género y enfoque de género se desarrollarán con base en las teorías feministas, sin olvidar las aportaciones a la crítica del derecho y a la metodología jurídica del iusfeminismo. Este punto de partida asume, por tanto, que la lucha de las mujeres a través del derecho y los derechos, ha sacado a la luz, precisamente, la naturaleza profunda y estructuralmente masculina de ambos

A Quantitative Assessment of Forest Cover Change in the Moulouya River Watershed (Morocco) by the Integration of a Subpixel-Based and Object-Based Analysis of Landsat Data

A quantitative assessment of forest cover change in the Moulouya River watershed (Morocco) was carried out by means of an innovative approach from atmospherically corrected reflectance Landsat images corresponding to 1984 (Landsat 5 Thematic Mapper) and 2013 (Landsat 8 Operational Land Imager). An object-based image analysis (OBIA) was undertaken to classify segmented objects as forested or non-forested within the 2013 Landsat orthomosaic. A Random Forest classifier was applied to a set of training data based on a features vector composed of different types of object features such as vegetation indices, mean spectral values and pixel-based fractional cover derived from probabilistic spectral mixture analysis). The very high spatial resolution image data of Google Earth 2013 were employed to train/validate the Random Forest classifier, ranking the NDVI vegetation index and the corresponding pixel-based percentages of photosynthetic vegetation and bare soil as the most statistically significant object features to extract forested and non-forested areas. Regarding classification accuracy, an overall accuracy of 92.34% was achieved. The previously developed classification scheme was applied to the 1984 Landsat data to extract the forest cover change between 1984 and 2013, showing a slight net increase of 5.3% (ca. 8800 ha) in forested areas for the whole region

Consumption recovery in 2021: an analysis drawing on consumer expectations

Artículo de revistaConsumers’ expectations of economic developments are a fundamental determinant of their spending decisions. This article estimates, using simple expectation formation rules in the context of a general equilibrium model, the degree of persistence that households assign to the economic impact of the pandemic. The findings show that households have perceived that the COVID-19 shock has a lower degree of persistence than other previous negative shocks. According to the model used, this would signal an uptick in private consumption, once the health crisis is over, that would tend to offset the decline observed during the pandemic