Abstract: The supply chain is a network of nodes that connects the different states through which a raw material must go from the source to being a finished product available to the consumer. The intermediate nodes that help reduce the distances between the manufacturer and the customer when distributing products are called warehouses, distribution centres or cross-docks. These facilities serve as temporary storage that reduces distribution costs and allows products to be available closer to the customers when required. In many operations worldwide where automation is not an option as it is a costly alternative, these warehouses, distribution centres and crossdocks manually operate with workers their activities of loading, unloading, picking, sorting, storing, among others. This study seeks to address the workforce sizing problem in warehouses, distribution centres or cross-docks to understand what the indicated number of workers should be to meet the site's performance indicators, meet demand and reduce operating costs. The research was developed under a methodology with mixed methods, where from an exploratory sequential approach, it begins with a systematic literature review to find the most relevant variables or factors used by multiple studies when trying to address the problem of dimensioning the workforce in distribution centres, warehouses, or cross-docks, as well as contrast their approaches and identify the techniques and tools used. With this, a total of 46 variables were found by breaking down their frequency of appearance by journal article or conference proceeding, clustering them into 7 categories which are input and output operations, material handling equipment (MHE) performance, warehouse configuration, warehouse performance, product complexity, picking operations and labour and worker conditions. Based on these variables, some were used in the technique that most frequently appeared in the literature, simulation. Here, a crossdock of a company belonging to the mass consumption sector was virtually represented using Flexsim software. The objective of this simulation was to find the number of forklifts needed to handle the loading and unloading operation of 5 types of trucks under different demand scenarios, or the total number of trucks to attend per day. After developing the model and extracting the results for 4 demand profiles, a sensitivity analysis was carried out where the influence of the forklift quantity on the crossdock performance measures was demonstrated, finding that as the number of forklifts increased, the average truck cycle time decreased, the total quantity of trucks attended reached the expected number per day according to the demand profile, and the average forklift utilization decreased. Finally, the limitations were shown from the literature and from the simulation model to address the workforce sizing problem, giving suggestions for future research that can deepen or address the problem from another approach.

Abstract: The thesis critically deals with Urban Greening, a phenomenon that transformed contemporary urban areas in the post-industrial landscape. After a deep exploration of literature and field fieldwork, this research defines such an issue as “an accumulative mechanism of translation of the perception and relationship between society and urban nature”. By inquiring greening mechanisms in the cases of Rotterdam and Torino, the work proposes a design experiment to challenge the current ways of production of green bodies, by fostering new relationships in the urban sphere. The first part of the thesis defines urban greening through literature, contemporary definitions, and categorizations. Aiming for a redefinition of the concept by means of the deconstruction into its main components; society, nature, time, and interactions. The research directly moves towards a better understanding of what greening and nature can mean, by confronting the ideas of some significant authors, such as Matthew Gandy, Phillippe Descola, and Lucilla Barchetta, among others. The exploration understands the relevance of greening as a term that has gained momentum in the past few decades, with the decline of the post-industrial landscape and the increasing degradation processes of the Anthropocene. However, the general approach, wishes to go beyond the contemporary notions of greening, as one of the promises of the so-called “sustainable city”, and explore the constructions and narratives that have constituted its meaning throughout time. The second part of the inquiry takes two contemporary cities as case studies: Rotterdam and Torino. By analyzing their greening history and urban expansion, to later take a look at the modern-day panorama in terms of administration, governance, and policies around green infrastructures. Moreover, confronting this Greening agenda with the projects that will shape the future of Rotterdam and Torino, assessing their reach, coherence, and implementation in terms of the Sustainable City. As a result of the case studies exploration, the thesis draws a series of considerations that suggest new types of relationships around urban greening. The last part of the study wishes to challenge current ways of urban greening, by experimenting with a form of planning that drifts apart from the objectification of green elements and hopefully tries to integrate spontaneity in urban relationships.

Abstract: I document differences in inflation rates across gender in the UK between 2001 and 2021. Using data from the interview and diary components of the Living Costs and Food Survey, for the period spanning 2001-2021, I compute gender specific inflation rates for male and female households. I find that average annual inflation was higher for male than for female households (17 and 15 basis points higher for single and cohabitating male households than single and cohabitating female households, respectively). This difference persists after controlling for other sociodemographic characteristics. Differences are mainly explained by male households spending a significantly larger part of their consumption budget in relatively higher-inflation product categories, such as transport, restaurants and hotels, and alcohol and tobacco. Deflation in clothing and footwear, a category on which female households spent around twice as much as male households, further increased the gap. I also document a significant amount of heterogeneity in inflation within gender. Resumen: Documento las diferencias en las tasas de inflación por género en el Reino Unido entre 2001 y 2021. Utilizando datos de los componentes de entrevista y diario de la Living Costs and Food Survey del Reino Unido, para el periodo comprendido entre 2001 y 2021, calculo las tasas de inflación específicas por género para los hogares masculinos y femeninos. La inflación media anual fue mayor en los hogares masculinos que en los femeninos (17 y 15 puntos básicos, respectivamente). Esta diferencia persiste después de controlar otras características sociodemográficas. Las diferencias se explican principalmente por el hecho de que los hogares masculinos gastan una parte significativamente mayor de su presupuesto de consumo en categorías de productos que experimentaron una mayor inflación, como transporte, restaurantes y hoteles y alcohol y tabaco. La deflación en ropa y calzado, una categoría en la que las mujeres en la que los hogares femeninos gastan aproximadamente el doble que los masculinos.

Natural Resource Revenues: An opportunity to grow? Estimating the effect of royalties on Colombian departments Abstract: Do royalties from the natural resource extraction contribute to economic growth in the Colombian context? To answer this question, this study examines the allocation and use of royalties in the 32 Colombian departments between 2005 and 2019, period that spans two different governance schemes. Using panel data analysis, it finds that from the allocation perspective, there are indications of the natural resource curse in producing departments. In terms of the returns of the investments, the results highlight issues related to the efficiency and quality of public investment in the main sectors, despite the significant contribution of the 2011 royalties’ reform to address revenues mismanagement and equity issues. These results point to imbalances in the royalties’ policy, thus contributing to inform the current debate on energy transition and future policy reforms. Resumen: ¿Contribuyen las regalías provenientes de la extracción de recursos naturales al crecimiento económico en el contexto colombiano? Para responder a esta pregunta, este estudio examina la asignación y el uso de las regalías en los 32 departamentos colombianos entre 2005 y 2019, periodo que abarca dos esquemas de gobernanza diferentes. Utilizando análisis de datos de panel, encuentra que desde la perspectiva de la asignación, hay indicios de la maldición de los recursos naturales en los departamentos productores. En términos de los retornos de las inversiones, los resultados destacan problemas relacionados con la eficiencia y la calidad de la inversión pública en los principales sectores, a pesar de la importante contribución de la reforma de las regalías de 2011 para abordar la mala gestión de los ingresos y los problemas de equidad regional. Estos resultados apuntan a desequilibrios en la política de regalías, contribuyendo así a informar el debate actual sobre la transición energética y las futuras reformas de política.

Abstract: In this thesis, I test if the effect of state intervention on economic growth and inequality depends on the level of institutional quality a country presents. I use three different proxies to measure the degree of state intervention in the economy, then I specify a model which includes an interaction term between rule of law and one of the proxies of state intervention. The model is tested in a cross-panel dataset for at most 58 countries in 7 three-year periods, from 1998 to 2018. I find evidence for a non-linear relationship between income per capita and state intervention when the latter is proxied as market openness, varying on the level of rule of law. Contrary to expectations, countries with better institutional quality do not benefit the most from freer markets. As for inequality, I find non-robust evidence of a crossover interaction between public employment and rule of law, yet this result is not economically meaningful. Resumen: En esta tesis, compruebo si el efecto de la intervención estatal sobre el crecimiento económico y la desigualdad depende del nivel de calidad institucional que presenta un país. Utilizo tres indicadores distintos para medir el grado de intervención estatal en la economía y, a continuación, especifico un modelo que incluye un término de interacción entre la variable de Estado de Derecho (rule of law) y uno de los indicadores de intervención estatal. El modelo se testea en una base de datos de panel con un máximo de 58 países en 7 períodos de tres años, de 1998 a 2018. Encuentro pruebas de una relación no lineal entre la renta per cápita y la intervención estatal cuando esta última se aproxima como apertura del mercado, variando en función del nivel de Estado de Derecho (rule of law). Contrario a lo esperado, los países con mejor calidad institucional no son los que más se benefician de mercados más libres. En cuanto a la desigualdad, encuentro pruebas no robustas de una interacción cruzada entre el empleo en el sector público y el Estado de Derecho, aunque este resultado no es económicamente significativo.

Este trabajo expone el proceso y los resultados de una investigación-creación que tiene como objetivo la descripción de los cuerpos que transitan en el sistema de transporte bogotano: Transmilenio. Basado en microrelatos de usuarios, en un diario de campo, fuentes teóricas, registro visual, construcción de categorías, lo análogo y metafórico de un proceso de creación artística desde las artes escénicas, se proponen descripciones sobre las sensaciones, emociones y acciones que realiza el cuerpo que transita, gracias a su relación estésica y estética que tiene con este medio de transporte. Igualmente, se realiza una presentación del proceso y los resultados de la creación y por último como conclusiones, se proponen varios dilemas que debe soslayar este cuerpo en su diario vivir. Planteándose como una de las soluciones para mejorar la calidad de vida en este medio de transporte, el concebir el cuerpo como metáfora de transformación gracias al concepto de poder cotidiano, capaz de construir un lugar de tránsito también en un lugar para habitar.

The Interaction of electromagnetic waves with dielectric bodies and metals has been extensively studied because of its importance to problems including propagation through rain or snow, scattering by and detection of air borne particles, coupling to missiles with plasma plumes or dielectric-filled apertures, performance of communication antennas in the presence of dielectric and magnetic inhomogeneities, and medical diagnostics and power absorption in biological bodies. Computational electromagnetics methods (CEM) offer and indispensable tool for calculating the electromagnetic scattering from an internal field distribution of arbitrarily shaped, inhomogeneous, dielectric bodies. The aim of this thesis is the study and simulation of a RF coils system design by developing a novel parallel fast Method of Moments (MoM) modeling approach suitable for the simulation of dielectric bodies and metals. The parallel fast MoM implementation uses volume and surface basis functions with special properties appropriate for the representation of flux current densities for perfect electric conductors (PEC) and dielectrics. The results obtained with our modeling method were confirmed by comparisons with analytical solutions and other commercial software results, yielding very good agreement. The RF coil is employed in high field Magnetic Resonance Imaging (MRI) to obtain high quality brain images. Among all the clinical imaging techniques, MRI stands as a noninvasive technique that provides accurate, detailed anatomic images, which has had a major impact in the diagnosis of human diseases. MRI is a widely use soft-tissue imaging modality that has involved over the past several years into a powerful and versatile medical diagnostic tool capable of providing in-vivo diagnostic images of human anatomy. Current research areas in MRI system design are driven by the need to obtain detailed high resolution images with improved image signal-to-noise ratio (SNR) at a given magnetic field strength. One of the most critical factor that influences the quality and resolution of the MRI is the homogeneity of the RF field. To this end, this requirement demands the development of high performance MRI radio frequency (RF) coils and a standard procedure for enhancing the uniformity of the field directly at the modeling stage of the RF Coil.

LGBTQ issues have been mainstreamed in media and academic literature, especially in countries of the Commonwealth of Nations, where homosexuality has been said to be criminalized through the commonly known “sodomy laws”. This has fueled an international social movement, led by Western human rights organizations, with cultural, political and economic goals seeking to advance LGBTQ rights globally. However, research on these issues in Sri Lanka re-mains limited. This study seeks to overcome this gap by exploring the LGBTQ movement in its capital, Colombo, conducting a series of interviews to LGBTQ leaders, activists and active members of the community. The study uses social movement theory (with the concepts of grievances, collective identity and strategy) and postcolonial theory. Hence, the following research question is answered: How is the politics of the LGBTQ movement expressed in postcolonial Sri Lanka? Findings indicate that the movement’s grievances are connected to the country’s colonial history, as well as to the human rights discourse. Additionally, collective ‘identity’, a complex concept in Sri Lanka, was found to be “hybrid” among activists, and was contested by activists themselves. Lastly, it was found that there is an insinuation of concern in terms of mimicry in the strategies and a suggestion to decolonize from Western models of activism. Los temas LGBTQ han sido ampliamente debatidos en los medios de comunicación y en la literatura académica, especialmente en los países de la Mancomunidad de Naciones, donde la homosexualidad es criminalizada a través de las “leyes de sodomía”. Esto ha alimentado un movimiento social internacional, liderado por organizaciones occidentales de derechos humanos con propósitos culturales, políticos y económicos que busca promover derechos para personas LGBTQ a nivel global. Sin embargo, la investigación académica sobre estos temas en Sri Lanka es limitada. Este estudio busca llenar este vacío explorando el movimiento LGBTQ en la capital del país, Colombo, por medio de entrevistas a líderes, activistas y miembros activos de la comunidad LGBTQ. El estudio usa conceptos de la teoría de movimientos sociales (agravios, identidad colectiva y estrategia) y de la teoría postcolonial. Así, se responde la siguiente pregunta de investigación: ¿cómo se expresan las dinámicas políticas internas del movimiento LGBTQ en Sri Lanka postcolonial? Los resultados indican que los agravios del movimiento están conectados con la historia colonial del país, así como el discurso de derechos humanos. Adicionalmente, la ‘identidad’ colectiva, un complejo concepto en Sri Lanka, fue identificada como “híbrida” entre los activistas y se configuró como un concepto controvertido entre los mismos activistas del movimiento. Finalmente, se encontró que hay una preocupación en términos de la imitación en las estrategias utilizadas por el movimiento, así como una insinuación para descolonizarlo de los modelos occidentales de activismo. El autor de esta tesis fue nominado al Hydén Award de Lund University, otorgado a las mejores tesis de pregrado y maestría en asuntos socioeconómicos y políticos en países de ingresos bajos y medios.

Este proyecto se lleva a cabo en la empresa Dilop Jeans la cual maneja todo a través de maquilas y busca mediante este proyecto crear una nueva línea de pijamas maternas confeccionadas por mujeres cabeza de familia de Granada Cundinamarca quienes están siendo capacitadas por un ingeniero de producción para que puedan trabajar desde sus casas generando ingresos que mejoren su calidad de vida. La materia prima que se utiliza es natural (100% algodón) lo que permite optimizar los desechos vendiéndolos para la fabricación de otros productos ejemplo: colchones. Las generadoras del proyecto cuentan con la experiencia previa en el sector de la confección y comercialización, así como el manejo de clientes a nivel nacional y conocimientos necesarios en administración y manejo financiero para llevar con éxito este proyecto. La inversión necesaria es de 50 millones de pesos para comprar maquinaria y materia prima. Generando una TRIR de 431%, un EBITDA del 16% anual y una rentabilidad del 10% anual la cual va aumentando un 5% anualy PAYBACK a partir del 8 mes. es un excelente proyecto para invertir ya que es viable financieramente, contribuye al bienestar social y mitiga el daño al medio ambiente.

Being Smart SAS. Laboratories, a company under study, a company belonging to world class market cosmetics, presents logistical challenges are great, including improving inventory management. The Improved work inventory control finished product Laboratories Smart SAS addresses this problem from the point of view of the theory of constraints, in order to find possible bottlenecks that occur, and so that these must be exploited; Finally, after a year of research and implementation were initial results in significant reductions in losses and increased operating efficiencies of the organization.