La calle, no es lo mismo vivirla que vivir en la calle. La experiencia de habitar la calle

Maestría en Educación y Desarrollo Humano, Facultad de Ciencias Sociales y Humanas.La presente tesis pretende brindar unos esbozos sobre las formas de habitar la calle, desde la visión de los habitantes de la calle, sus formas de caminar, morar, permanecer y hacer arte a través de sus dinámicas de vida. Es entonces, un intento escrito de generar un espacio alterno de enunciación frente a la población habitante de la calle, alejados de las posturas de exclusión y caritativas

Observatorio Geográfico: Salud y Riesgos en México

En el año 2017, a vísperas de su culminación se publica el presente libro, en donde se abordan algunos de los temas del observatorio geográfico, cuya base teórica se centra en la Geografía de la salud, que nunca fue tan amplia y diversa en su objetivo como lo es hoy en día, además es un área científica que ha ido prosperando ampliamente en los últimos años y cuyos resultados en la actualidad son cada vez más visibles. Además de ello, el estudio sobre la salud humana ofrece al analista del territorio la oportunidad de aportar conocimiento sobre la distribución espacial de enfermedades importantes que aquejan la sociedad, presentando directamente las desigualdades ante la muerte, la enfermedad y la salud, articulando hechos naturales y sociale

Reducing the environmental impact of surgery on a global scale: systematic review and co-prioritization with healthcare workers in 132 countries

Abstract Background Healthcare cannot achieve net-zero carbon without addressing operating theatres. The aim of this study was to prioritize feasible interventions to reduce the environmental impact of operating theatres. Methods This study adopted a four-phase Delphi consensus co-prioritization methodology. In phase 1, a systematic review of published interventions and global consultation of perioperative healthcare professionals were used to longlist interventions. In phase 2, iterative thematic analysis consolidated comparable interventions into a shortlist. In phase 3, the shortlist was co-prioritized based on patient and clinician views on acceptability, feasibility, and safety. In phase 4, ranked lists of interventions were presented by their relevance to high-income countries and low–middle-income countries. Results In phase 1, 43 interventions were identified, which had low uptake in practice according to 3042 professionals globally. In phase 2, a shortlist of 15 intervention domains was generated. In phase 3, interventions were deemed acceptable for more than 90 per cent of patients except for reducing general anaesthesia (84 per cent) and re-sterilization of ‘single-use’ consumables (86 per cent). In phase 4, the top three shortlisted interventions for high-income countries were: introducing recycling; reducing use of anaesthetic gases; and appropriate clinical waste processing. In phase 4, the top three shortlisted interventions for low–middle-income countries were: introducing reusable surgical devices; reducing use of consumables; and reducing the use of general anaesthesia. Conclusion This is a step toward environmentally sustainable operating environments with actionable interventions applicable to both high– and low–middle–income countries

Celestino Bernal

Celestino Bernal talks about his early childhood in Mexico and about his life as a farmer in Valle Hermoso, Tamaulipas, Mexico.https://scholarworks.utrgv.edu/rgvoralhistories/1033/thumbnail.jp

Central reactive power control for smart low-voltage distribution grids

Due to the high penetration of renewable distributed energy resources (DERs) into low-voltage distribution grids, particularly residential photovoltaic (PV) systems, a renewed interest in voltagecontrol strategies arises in the recent years. Although voltage-control strategies based on reactive power produced by smart PV inverters are a well developed technique, the use of central control strategies for LV distributed grids remains a challenging procedure because of the characteristics of these grids and the limitations of telecommunication networks, including the low measurement redundancy of low-voltage (LV) distribution system compared to power transmission systems. However, with the inclusion of Information and Communication Technology (ICT) components into the LV distribution grid, measurement data from smart meters are available for the control of these networks. This dissertation undertakes a central voltage-control strategy for smart LV distribution networks, using a novel optimal power flow (OPF) methodology in conjunction with the information collected from smart meters for the power flow calculation. The proposed strategy can simultaneously mitigate the PV reactive power fluctuations, as well as minimize the voltage rise and power losses. Moreover, a novel distribution power system state estimation method (DSE) based on the information provided by smart meters is developed to support central voltage-control strategies in real-time in case of telecommunication failure. In order to analyze the developed techniques, a more realistic scenario of smart LV distribution networks is designed, including high-resolved home power demand models and a novel approach for the power flow formulation of LV distribution systems. Comparison studies to validate the developed methodologies are presented for IEEE 30-bus, 57-bus system and a 30 smart home LV distribution system, showing the robustness of proposed methods compared with traditional approaches. The results are promising as voltage control is achieved fast and accurately, the reactive power is smoothed in reference to the typical optimization techniques and local control strategies. Furthermore, using the information provided by the smart meters in combination with the developed power flow formulation, the proposed central control system is able to mitigate the effects of temporal communication link failure from smart meters to utility company. To illustrate the applicability of the proposed method, a real-time digital simulator for smart distribution power grids with a central voltage-control system are used. The results show that the proposed method is effective to estimate the missing values in the case of communication problems between smart meters and the central control system, even for ill-conditioned systems

Gumaro Flores

https://scholarworks.utrgv.edu/rgvoralhistories/1117/thumbnail.jp

Josefina Garcia

Josefina Garcia describes her life and jobs in Mexico and her involvement in the United Farm Workers (Unión de Campesinos). She was born in San Luis Potosi, Mexico in 1913.https://scholarworks.utrgv.edu/rgvoralhistories/1129/thumbnail.jp

Gilberto Flores

Gilberto Flores tells about his school and college years and about employment with the La Joya Independent School District, [LJISD]. He was born in 1914 in Los Ebanos, Texas.https://scholarworks.utrgv.edu/rgvoralhistories/1116/thumbnail.jp

Fuzzy-Based Reactive Power Control for Smart PV Inverters in LV Distribution Systems

Future society entails new paradigms in how the world will work; new ideas as Smart Grid, Smart Cities, Smart Homes, and their interactions have been established and studied. With the inclusion of Information and Communication Technology (ICT) components into the low-voltage (LV) distribution grid, some measurement signals from smart meters are available for distribution network control with high penetration of photovoltaic systems (PV). This paper takes a local voltage-control strategy for smart LV distribution networks, by using a fuzzy based methodology using local information collected from smart meters as status information source of the grid. Comparative studies are presented for a smart home LV distribution system to validate the method, showing the robustness of proposed method compared with the traditional local approaches. To illustrate the applicability of the proposed method, a real-time digital simulator for smart distribution power grids with a the developed voltage-control system are used. The results show the proposed method can simultaneously mitigate the PV reactive power injection, as well as minimize the voltage rise and power losses

Reactive power fluctuations smoothing in optimal control of grid-connected PV systems

High reactive power fluctuations in Low-Voltage (LV) distribution systems may negatively impact the power quality of the electrical network in a variety of ways. In this paper, a novel multi-objective optimal power flow (OPF) formulation is developed to smooth the reactive power fluctuations caused by photovoltaic (PV) inverters in central voltage-control strategies for LV distribution networks with high PV penetration. The proposed multi-objective optimization methodology includes a minimization of the violations to a dead filter-based band to smooth them. Results show that while a typical Voltage Rise Minimization (VRM) optimal method and local Q(U) method have similar behaviour with high reactive output power fluctuations, the proposed method significantly outperforms these two methodologies smoothing the reactive fluctuations until a 75% achieving the optimal control goals set