Development of decree 1072 of 2015, as a regulatory factor of practices in the construction field for the prevention of workplace accidents with MHF Construark SAS, carried out during the year 2020 in Bogotá

Introduction: This article "Development of the decree 1072 of 2015, as a regulatory factor of practices in the construction field for the prevention of workplace accidents in MHF Construark SAS" company was executed during 2020 in Bogotá. Background: There has been recurring practices in the construction sector that generate difficulties in the implementation of the SGSST, which may be the main cause of this insufficient implementation, which can lead to workplace accidents and occupational diseases. Objective: The objective of the investigation is to establish the level of compliance in the implementation of the SGSST, in order to identify determining factors that negatively affect such a process. Methods: This research has designed a study with mainly, a qualitative approach. Interviews were conducted with company representatives from the administrative area in charge of implementing the SGSST. Results: The MHF Company has achieved an implementation level of 85%. It is at a high level. Conclusion: This project contributes to the research in terms of the study of SGSST in particular, from a perspective that inquiries factors related to the role of key factors such as senior management and construction personnel. Originality: A small business of the construction field is investigated, setting up human factors in the SGSST implementation processes and the improvement strategy Limitations: information gathering on site was affected due to the circumstances generated by the COVID-19 emergency due to the fact the construction field was forced to suspend work as consequence of the pandemic

Non-explosive training Grenade for the Schools of the Colombian Military Forces and Police

The article is the product of the research " Non-explosive training grenade Design for the practice and launch exercise in the training schools of Colombian military forces", carried out during 2017 and 2020 in the Non-Commissioned Officers Military School.

Towards a competitive ST system in the defense sector

Summary: This article describes a diagnostic investigation called, sustainable military science and technology (ST) in Colombian Air Force (FAC), developed in Aerospace Technological Development Centre (CETAD) between 2019 and 2020, which seeks to identify its weaknesses and strengths to achieve a competitive and sustainable ST system according to the National Security needs that enhances national development and achieve technological sovereignty. Problem: Is it possible to implement a sustainable and competitive ST system in the defense sector, that enhances the economic and industrial development of the country? Objective: This research seeks to diagnose the institutional ST system, identifying weaknesses and strengths and proposing strategies to generate a sustainable and competitive ecosystem. Methodology: A comparison was made between relevant bibliography analysis, the national context, and the result of the diagnoses of the ST system. Results: ST system is characterized by a efforts dispersion and a disconnection with the mission objectives and its leaders, however, there is a success case that shows how with a pragmatic orientation to the mission, results can be achieved. Conclusion: It was determined that it is possible to achieve a system that from the sector supports national development, integrating effective marketing and transfer practices and concentrating efforts on the mission. Originality: Through this research, was possible stablish the ST state of Colombian Air Force in order integrate the system capabilities to the missional process. Limitations: The lack of information provided by personal that conform the ST and the lack of knowledge of missionary processes.

Li-fi: Current state, progress and forward projection

Problem: The increase in wireless devices connected to the internet, saturation of the electromagnetic spectrum used by wireless technologies based on current radio frequencies (Wi-Fi, Bluetooth, ZigBee, among others), new requirements for bandwidth, speeds and energy efficiency for the new generations of telecommunications are the cause of the birth of Li-Fi as an alternative and / or complementary technology of wireless telecommunication that is based on the visible light spectrum. Objective: The objective of this research is to expose the development of Li-Fi technology in the field of telecommunications, covering it in three main aspects such as the current state of technology, recent advances, and future projections. Methodology: Different types of bibliographic sources were used, including research and opinion articles, marketing studies, forums, books, conferences, among others with a publication date of 2012 onwards (some exceptions are found in the references); taking as selection criteria title, authors, date of publication, abstract, results and / or conclusions in relation to the research guidelines (Current Status, Advances and Future Projection of Li-Fi technology) Conclusion: The literature review article manages to highlight the importance of Li-Fi in the new generations of telecommunications of the future and its complementarity with current networks, optimally contextualizing the technology, exposing its advantages and recent advances in technical and commercial aspects as well like its disadvantages and points. weaknesses that should be addressed in the development of this technology in the future

Technological trends

Introduction: This bibliographic review article is the product of research on new technological trends, focusing on citizen security, carried out at the SIEL research hotbed of the Universidad del Valle-Buga headquarters, Colombia in 2019. Problem: Investigate the new technological trends aimed at the citizen security sector. Objective: Identify the new technological trends in the sector of citizen security, its application in the world and expose the current state in Colombia. Methodology: Documentary review of primary sources of the last 5 years, such as; scientific articles, government pages, laws, press releases and recognized newspapers. Results: Since MinTIC was created in Colombia, in partnership with different government entities, society in general has benefited from projects in areas such as education, health, housing and security. The modernization of control institutions in Colombia is evident being the security sector one of the most advantageous. Conclusion: In general terms, sectors such as technology and education are still lagging behind. As for the security sector, there is no doubt the effort and progress in research and development of new technologies present in the vast majority of government entities. Originality: new technological trends are investigated from the point of view of citizen security in several application scenarios. Limitations: For the most part, the review focuses on aspects of citizen security, indicating very little the social field

Multilayer validation system for the automation of data in a WSN network with IOT devices

Introduction: Article resulting from the research "Multilevel validation system with an emphasis on data transmission in a Gateway for the IoT," supported by the Research Line in Internet Applications of the University of Cauca during 2020. Problem: Bridges between wireless sensor networks (WSN) and the Internet are necessary for the for the operation of IoT devices. However, these networks are made up of weak links that can generate packet loss. Objective: present an alternative to improve the data transmission validation process given a frame implemented in a previously developed WSN-IoT system. Methodology: Scientometric review in the WoS and Scopus databases on concepts related to Industry 4.0 (data from 2015 to 2019), IoT and WSN (data from 1990 to 2019), and algorithm generation based on Scrum and test-based development (TDD). Results: A validation application that captures, analyzes frames, and compares the values of the monitored variables in each layer of the implemented model, and ultimately reports the errors detected in the data transmission. Conclusion: with the completion of this investigation, the data transmission validation process of the WSN-IoT system was improved, focused on logistics and monitoring, automating the process. Originality: An alternative to validate the correct transmission of data in a WSN-IoT system is achieved through this research and shown for the first time on trending topics such as industry 4.0, the industrial Internet of things, the supply chain, logistics, and traceability. Limitations: little research in the area of validation, few and delicate hardware devices, in addition to a high dependence on networks to monitor the performance of the designed application.

Composting of solid waste from the coffee milling process using trench composting and a bioreactor with the help of efficient microorganisms in the Libre University, Socorro headquarters

Introduction: The present article is the product of the research “¿Use and management of organic waste from the Majavita farm, Universidad Libre, Socorro Headquarters (Santander)?" carried out during 2017 and 2018 in Socorro, Santander. Problem: Currently the Libre University, offers to solid waste coming from the benefit of the coffee a management in a trench compost system to prevent contamination that is caused for it poor disposal; this does not imply the production of an optimum product that shall have the standards of quality of a suitable compost. Objective: Propose an alternative to operate the compost process under suitable conditions of the process variables; it is expected that would allow waste to compost more efficiently and in less time. Methodology: This article compares the effectiveness of composting production in a traditional trench system against a semi-closed bioreactor system, and the cost-benefit of implement this proposed system. Results: To guarantee the result by showing the improvement of the process; is necessary to follow and compare the behavior of the process variables in each kind of composters, such as temperature, moisture and ph. Conclusion: This project seeks to propose a viable alternative for the treatment of the solid waste of the productive process of the coffee. Originality: This research, seeks to improve the process of compost in the Majavita Farm. Limitations: The time used to the farm to compost the solid waste using a traditional system.

A review of the relation between climate variability and mass removal processes

This literature review article is a product of the Research Project “Relation Between Climate Variability with Mass Removal Processes. Tunja-Páez case study”, developed in the Universidad Pedagógica y Tecnológica de Colombia in the year 2020. Introduction: This article focuses on the review of research studies and advances made during the last decade regarding the influence of climatic variability on the dynamics of slopes. Objective: To determine the influence of climatic variability in areas that present slope instability in the Tunja-Páez road corridor located in the department of Boyacá. Methods: A systematic review of information from books, manuals, reports, guides, and scientific articles on climate change, climate variability, mass removal processes, meteorological variables, and their influence on the resilience and adaptation of infrastructure related to containment and slope drainage projects. Results: The studies indicate criteria that relate temperature, precipitation and seismic activity with the occurrence of mass movements. Conclusion: Climatic anomalies in terms of precipitation and temperature has allowed research methodologies using probabilistic models to be developed for estimating the occurrence of said phenomena in future scenarios. Originality: The presented literature indicates the influence of climatic variability in the resulting mass removal processes as evidenced in studies at the global and national level. Limitations: This article scientific studies have been compiled that contrast the problems in the stability of slopes of the Tunja-Páez road corridor, without going into the details of these problems.

Locus recommendation using probabilistic matrix factorization techniques

Introduction: The present paper is the outcome of the research “Locus Recommendation using Probabilistic Matrix Factorization Techniques” carried out in Manav Rachna International Institute of Research and Studies, India in the year 2019-20. Methodology: Matrix factorization is a model-based collaborative technique for recommending new items to the users. Results: Experimental results on two real-world LBSNs showed that PFM consistently outperforms PMF. This is because the technique is based on gamma distribution to the model user and item matrix. Using gamma distribution is reasonable for check-in frequencies which are all positive in real datasets. However, PMF is based on Gaussian distribution that can allow negative frequency values as well. Conclusion: The motive of the work is to identify the best technique for recommending locations with the highest accuracy and allow users to choose from a plethora of available locations; the best and interesting location based on the individual’s profile. Originality: A rigorous analysis of Probabilistic Matrix Factorization techniques has been performed on popular LBSNs and the best technique for location recommendation has been identified by comparing the accuracy viz RMSE, Precision@N, Recall@N, F1@N of different models. Limitations: User’s contextual information like demographics, social and geographical preferences have not been considered while evaluating the efficiency of probabilistic matrix factorization techniques for POI Recommendations.

Fusion of medical images in wavelet domain: an algorithmic model

Introduction: Image Fusion techniquesconsist of three stages: extraction of features, reduction of dimensions, and classification. Problem: This paper presents a novel approach for Multiresolution analysis. Objective: It is most widely used in image fusion science, which captures the features of an image not only at different resolutions, but also at different orientations. Methodology: This Wavelet based algorithm has additional advantages of fast implementation, versatility, auxiliary memory saving, complete reconstruction properties and simplicity as wavelet transformation was used. Results: The simulation results of the MRI and CT images show perfectly acceptable image quality and cover disease detection in the subsequent final image. Conclusion: Principal Component Analysis (PCA) based on fusion algorithms will empower medical researchers or clinicians to properly apply image fusion and data transmission, which leads to better care practices to minimize redundancies and can also handle data loss. Originality: Fusing images can decrease the image size, which can decrease the bandwidth when transmitting images. This also compresses the images; here an attempt is made to retain the same consistency. Limitations: As this is still a relatively novel method, mistakes with regard to the handling of clinical data may prompt treatment deficiencies for the patient. Image quality must not be diminished with this usage