Currently, there is a high systematic inequality regarding access to water, both between and within countries. In some, there is a wasteful picture and others show high water stress. This research developed an innovative response with the design of water supply, distribution, and recirculation systems (WSDR) in a sustainable social housing model (SSH) proposed by the researchers, based on a technological assessment which considers principles of spatial, environmental and economic efficiency in aqueduct cost and public service production for builders, user comfort, resource use optimization and its supply sources. In order to achieve this, the water resource of Bogota was diagnosed and technological options for saving water in new residential buildings were proposed; their viability was evaluated and their dimensions were estimated. Among the results, it was possible to project the saving of 110.03L/day or 40 % consumption of each residential unit (UH) proposed in the SSH model and 522,200L/ month in the tasks of washing and irrigation of common areas; This would result in water savings of 2,210,000 m3 /month in the urban expansion area of Bogota, equivalent to 1,361.54 Ha.

Software development projects are knowledge-intensive because they involve rigorous management processes that must articulate with good knowledge and management practices. This integration is closely
related to knowledge transfer, which is necessary for these projects. However, lack of collaboration, poor communication, lack of motivation to share knowledge, and the inability to make it available are some of the difficulties of knowledge management in software development projects. On the other hand, gamification influences people’s behavior, promoting motivation, commitment, and collaboration in work teams. In this sense, gamification can be a potential strategy to transform these difficulties. It is adopted in this research in the design of GamifiK, an approach to encourage knowledge transfer in software development teams by promoting collaboration. GamifiK integrates good knowledge management practices, gamification elements, and collaboration as a soft skill for knowledge creation and transfer. A pilot study was conducted in an academic context to evaluate the preliminary performance of the strategy and its possibility of being validated and implemented in

Different numerical simulations were carried out based on finite elements, where the response of six different pavement structures subjected to the effects of the load of an equivalent axis is analyzed, where a geogrid was placed in the asphalt layer as reinforcement. For the reinforcement geogrid, there are different adherence characteristics between the geosynthetic and the asphalt mixtures, in such a way that the performance of the systems was evaluated when absolute roughness is present at the interface, and roughness coefficients of 0.9, 0.7 and 0.5. The results obtained were compared with the responses of the structures without reinforcement, in this way the performance that was presented was studied to determine how critical the progressive loss of adherence is when implementing the geogrid as reinforcement in the wearing course. As a conclusion, it is found that the loss of adherence geogrid-asphalt layer produces a fundamental loss of structural response capacity, with a performance even worse than the case without any reinforcement.

A numerical model for predicting the effect of the modification of a fiber´s surface on the mechanical properties of biocomposite panels made with bamboo fibers and vegetable resin was elaborated. For the study, the three surface treatments methods were mercerization, plasma, and ozone treatment. To analyze the influence of each treatment on the surface of the fibers, a study of their morphology, chemical composition, and crystallinity was carried out using scanning electron microscopy, X-ray energy dispersion spectroscopy, and X-ray diffraction. A characterization of the physical properties of the fibers was carried out by determining the density and the absorption capacity. The influence of the treatment on the mechanical properties of the fibers was analyzed by determining their tensile strength. These results were used to determine the elastic properties of the plies that make up the biocomposite, applying the modified mixing rule for anisotropic materials. The numerical models were elaborated using a commercial finite element program, considering a linear analysis. The composite was conceived as a laminate made up of layers of fibers oriented in different directions. To validate the numerical results, panels were made using fibers treated according to established treatment methods and a vegetable resin. For the construction of the panels, a compression system at standard room temperature was used. The fibers were placed in six 1.13 mm-thick layers, reproducing the conditions established in the numerical model. The determination of the physical properties of the composite was based on the determination of the density, the absorption capacity, and the percentage of swelling.
The determination of the mechanical properties focused on obtaining the maximum strength for tensile, compression, and static bending. The results show that it is possible to improve the mechanical performance of the composite when the surface of the fibers that act as reinforcement is modified. According to the results, panels made with fibers treated with plasma and with ozone exhibited better mechanical performance, showing a good correlation between the results of the numerical models and the values obtained experimentally.

This paper presented the analysis of the difference between two techniques for the measurement of the velocity of water flows using the non-intrusive large-scale particle tracking velocimetry technique (LS PTV) and various intrusive techniques like digital water velocity meters.

This research analyzes the difference between two techniques for measuring the velocity of water flows, using the non-intrusive large-scale particle tracking velocimetry technique (LSPTV), and intrusive techniques such as electromagnetic windlass and propeller windlass. A fluvial characterization of the river is conducted to classify it in relation to various fluvial parameters. The technique is applied in the stretch of the river, using two types of Unmanned Aerial Vehicles (UAVs): DJI Inspire II and DJI Spark, using two types of tracers, to obtain velocity fields in the study section. Comparing the two techniques it is evident that the tracers that best adapted to the model are the orange peel with the Spark drone with a reliability of 91 %, compared to the tracers of plastic covers with the same vehicle with a reliability of 81 %. The LSPTV technique has higher reliability compared to conventional methods, even more when depth corrections are made; therefore, it would reduce the risks for operators and/or damage to equipment that needs to be introduced to the fluid.

Although they are of great economic importance for the communities, rural roads can generally be considered low traffic volume (LTV) roads, which makes their paving difficult to make financially feasible. As a result, most of these roads are unpaved, causing traffic difficulties, particularly during the rainy season. On the other hand, construction and demolition waste ( ) is an environmental problem in cities; its use in road construction has been identified as an alternative for its final disposal. The purpose of this research was to evaluate an alternative for use in low traffic volume roads as a material for the improvement of pavement subgrades. Specifically, the use of waste from brick masonry construction (WBMC) or demolition was evaluated. A technical and economic evaluation was carried out, for which pavement designs were made by adding between 10 and 40 % of WBMCL and residual soil in determined proportions and compared with conventional pavement designs using granular materials from quarry exploitation. The same traffic conditions, subgrade soils and design methodologies were used for all designs. The results obtained show that the use of WBMC mixed with soil as a subgrade improvement results in reductions in pavement granular layer thicknesses that can make it possible to dispense with the granular subbase layer with the respective economic and environmental benefits.