Communities in PRCR

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Measuring the Effect of Thermal Radiation on Pedestrian Comfort
(Polytechnic University of Puerto Rico, 2010-05) Blanco Díaz, Arnaldo J.; Pacheco Crocetti, Gustavo E.; Vélez Gallego, Amado; Collazos Ordóñez, Omaira M.
Puerto Rico is a moderately sized island in the Caribbean Sea; a location characterized by direct and consistent solar exposure throughout the year. Such consistent exposure to solar radiation would naturally have a greater impact on the thermal comfort of pedestrian than it would in more temperate zones. The objective of this research is the development of a methodology to measure the levels of thermal radiation affecting pedestrian facilities and to directly relate these results to pedestrian thermal comfort. The measurement of temperature should take into consideration three distinct sources of thermal radiation, all of which have a direct effect over pedestrian facilities: a) the direct solar radiation from the sun, b) the thermal radiation that is emitted from the heated pavement surface, and c) the thermal radiation resulting from vehicular activity in close proximity to pedestrian facilities. A plate thermometer was designed and used for temperature measurement. The use of a plate thermometer allows measurement of thermal radiation emitted from a single angle and simultaneously isolates the rest of the device. Sites with high and low amount of shadow were selected, in order to quantitatively assess the effect of the shadow in pedestrian comfort. The final step is the data analysis to develop empirical relations between the collected data and literature recommended standards for outdoor comfort. The obtained data should provide useful information for pedestrian facilities design in areas or regions with high levels of solar exposure, and for future development of pedestrian studies in regions that are exposed to microclimates.
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Illuminance Level as a Security and Comfort-Based Design Criteria for Pedestrian Facilities in SJMA
(Polytechnic University of Puerto Rico, 2011) López Cabrera, Carina; Pacheco Crocetti, Gustavo E.; Vélez Gallego, Amado; Guzmán De La Cruz, Alberto L.
One of the key aspects of Transit Oriented Development (TOD) and Smart Growth (SG) urban development is to provide walkable environments. In that sense, pedestrian and recreational facilities should be designed to provide an adequate level of comfort that stimulates and promotes its usage. These aspects are considered crucial for the successful development of these facilities but are usually disregarded during the design. Currently, a major infrastructure and economic inversion such as Puerto Rico’s urban (metro) train is considerably limited to daylight time usage; minimizing the intended potential of lowering private car use and the consequent reduction in carbon emissions. This motivated the research project to focus on the evaluation of the level of illumination as design criteria for pedestrian and recreational facilities by assessing the current conditions in key places within the San Juan Metropolitan Area (SJMA) in Puerto Rico. The evaluation considered the recommended standards for illumination, safety and comfort suggested by Illuminating Engineering Society (IES) and other well recognized organizations. A photometry study was conducted around three main train station areas, where data sets were mapped and represented using ArcGIS. Critical scenarios that were also identified were represented using Google SketchUP, Artlantis and Adobe Illustrator. Using linear regression an existing correlation between the illumination levels and lidership after 7:00 PM was evidenced. Although pedestrian lighting levels meet the recommended values for security and comfort in the immediate surroundings of the train stations, adjacent locations under the radio of influence fail to meet these values. Finally, best management practices (BMPs) were developed to provide applicable solutions to help the city comply with these recommended standards and promote the success and further encourage the nighttime use of the mass transportation system in (SJMA).
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Plan Estratégico del Colegio Universitario de San Juan 2024-2027
(CUSJ, 2024) Colegio Universitario de San Juan
Se presentan las ideas y el marco general que definen las iniciativas a implementarse en los próximos tres años académicos.
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General Catalog CUSJ 2021-2023
(CUSJ, 0023) Colegio Universitario de San Juan
Manual Informativo sobre el Colegio Universitario de San Juan, sus ofrecimientos académicos y servicios que se ofrecen.
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Beneficios al Estudiante Veterano
(CUSJ, 2024) Colegio Universitario de San Juan
La Oficina de Servicios al Estudiante Veterano tiene como misión orientar al estudiante veterano sobre los beneficios a los que tiene derecho con relación a la educación.