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Mold deterioration of historical documents in archives and libraries is a frequent and complex phenomenon that may have important economic and cultural consequences. In addition, exposure to toxic fungal metabolites might produce health problems. In this work, samples of broths of fungal species isolated from the documentary material and from indoor environmental samples of the Archive of Bogotá have been analyzed to investigate the presence of mycotoxins. High resolution mass spectrometry made possible to search for a large number of mycotoxins, even without reference standards available at the laboratory. For this purpose, a screening strategy based on ultra-high pressure liquid chromatography coupled to quadrupole-time of flight mass spectrometry (UHPLC–QTOF MS) under MS E mode was applied. A customized home-made database containing elemental composition for around 600 mycotoxins was compiled. The presence of the (de)protonated molecule measured at its accurate mass was evaluated in the samples. When a peak was detected, collision induced dissociation fragments and characteristic isotopic ions were also evaluated and used for tentative identification, based on structure compatibility and comparison with literature data (if existing). Up to 44 mycotoxins were tentatively identified by UHPLC–QTOF MS. 34 of these tentative compounds were confirmed by subsequent analysis using a targeted LC–MS/MS method, supporting the strong potential of QTOF MS for identification/elucidation purposes. The presence of mycotoxins in these samples might help to reinforce safety measures for researchers and staff who work on reception, restoration and conservation of archival material, not only at the Archive of Bogotá but worldwide. [ABSTRACT FROM AUTHOR]

Copyright of Revista Iberoamericana de Turismo is the property of Revista Iberoamericana de Turismo and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Revista Digital de Derecho Administrativo is the property of Universidad Externado de Colombia and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

As the prevalence of conflict and fragility continue to rise around the world, research is increasingly heralded as a solution. However, current ethical guidelines for working in areas suffering from institutional and social fragility, insecurity or violent conflict have been heavily critiqued as highly abstract; focussed only on data collection; detached from the realities of academia in the Global South; and potentially extractive. This article seeks to respond to that assessment by spotlighting some of the most prevalent challenges researchers face in the pursuit of ethical working practices. It explores the material and epistemic injustices that often shape and underpin research structures and relationships in these contexts. The paper draws on the authors' experiences of research in conflict-affected and fragile contexts over the last fifteen years and on workshop discussions with researchers based in fragile and conflict-affected contexts conducted in Amman, Bogotá and Dhaka in 2019-2020. The paper works from the premise that achieving ethical research in fragile spaces is not dependent solely on activity at the site of research, but also on decisions made across the entire ecosystem of a research project. It therefore interrogates the full research landscape, from funding models, to research design (including research topics, partnerships, methods, participant selection, and researcher positionality), to dissemination plans and ethical gatekeeping. The paper critically reflects on inequities in the processes of knowledge production about conflict and fragility and the key ethical challenges that researchers encounter. It highlights the need for further guidance, support and accountability to ensure ethical research practices. [ABSTRACT FROM AUTHOR]

Schedule conformance depends on construction activities starting and finishing on time. However, construction activities are often delayed because construction flows necessary to start their execution are unavailable. Construction flows can be classified into: labor, equipment, workspace, materials, precedence, information, and external. Current construction models do not formally represent, measure, and track all flow types. Hence, field managers lack formal methods for managing flows and instead rely on their intuition and experience managing them. This paper presents a construction model based on activities and flows called the activity–flow model (AFM). The AFM formally represents the activities, the flows, and their interactions. The AFM was validated prospectively through its implementation on three building projects that were in different phases (foundations, core and shell, and finishing), at different geographic locations (Bogota, Copenhagen, and Lima), and used different planning and control methods (master schedule and weekly planning, last planner system, and location-based management system). The AFM was able to represent all the activities and flows in the test projects, track variations of activities and flows, and quantify activity and flow variability. Field managers can use the metrics enabled by the AFM to plan and control the project. Such proactive flow management can help field managers improve flow readiness, which should reduce activity delays and improve schedule conformance. [ABSTRACT FROM AUTHOR]

The main aim of this study was to develop and test the effects of a field math intervention program on both number and geometry knowledge. The intervention was developed based on three basic skills previously associated with mathematical performance: symbolic number knowledge, mapping processes and spatial reasoning. The participants were 117 preschoolers from six schools in Cali and Bogotá. The children were assigned to an intervention group (N = 55) or a control group (N = 62). The intervention lasted 11 weeks with 3 sessions per week where the children participated in different game-based activities. Tests of numerical and geometric knowledge were administered before and after the intervention. The effects of the intervention were tested twice, immediately after the program ended and six months later. The results show that the children in the intervention group improved more than the control group in both number and geometry. The second posttest revealed a significant intervention effect for geometry, but not for numerical knowledge. The implications of these mixed patterns of results are discussed in the paper. [ABSTRACT FROM AUTHOR]

Purpose: The purpose of this paper is to examine the relationship of masculine eating/drinking beliefs on male consumers' concern with unhealthy eating/drinking habits and, in turn, with binge drinking. Additionally, this research tests if and how a change in these beliefs influences binge drinking intention and intention to eat unhealthy food. Design/methodology/approach: Three studies were conducted in Bogotá (Colombian males; convenience sampling). The purpose of Study 1 (N = 209) was to develop a scale to measure masculine eating/drinking beliefs. Study 2 (N = 191) tested the mediating role of concern with unhealthy eating/drinking habits in the relationship of masculine eating/drinking beliefs with binge drinking. Study 3 (N = 179) was an experimental study, which examined the effect of information about some negative consequences of masculine beliefs on the answers to the masculine eating/drinking beliefs inventory and, in turn, on binge drinking intention and intention to eat unhealthy food. Findings: A one-dimensional (eight-items) scale was developed and validated. The results of this paper show that masculine eating/drinking beliefs are associated with lower concern with unhealthy eating/drinking and, in turn, with higher binge drinking. Information that influences these beliefs leads to lower binge drinking and unhealthy food ingestion intentions. Research limitations/implications: This research presents the first scale that measures masculine eating/drinking beliefs. It provides initial evidence on how an intervention focused on the negative consequences of sexism can influence these beliefs, affecting binge drinking and overeating intentions. Practical implications: This research provides new findings on a topic associated with several health problems in many countries, including the effect on consumers' weight gaining and related illnesses. Originality/value: This research presents the first scale that measures masculine eating/drinking beliefs. It provides initial evidence about factors (through mediating variables) that link masculine eating/drinking beliefs with some unhealthy eating/drinking habits. In addition, the results show how information about some negative consequences of these beliefs can influence consumers' binge drinking and unhealthy food ingestion intentions, which leads to key recommendations for future interventions. As a result, this research provides new findings on a topic associated with several health problems in many countries, including the effect on consumers' weight gaining and related illnesses. [ABSTRACT FROM AUTHOR]

This paper studies the updated estimation method for estimating the transmission rate changes over time. The models for the population dynamics under SEIR epidemic models with stochastic perturbations are analysed the dynamics of the COVID-19 pandemic in Bogotá, Colombia. We performed computational experiments to interpret COVID-19 dynamics using actual data for the proposed models. We estimate the model parameters and updated their estimates for reported infected and recovered data. [ABSTRACT FROM AUTHOR]

This study seeks to understand how micro, small, and medium-sized enterprises (MSMEs) can be innovative while developing their reputation. In doing so, this study focuses on companies classified as promoters of Colombia's "orange economy," which relates to the country's cultural and creative diversity. Firms with a non-technological emphasis also require knowledge, innovation, and reputation to perform better. In this regard, the study is based on the work of Hormiga and Garcia-Almeida (2016) who proposed the relationship between accumulated knowledge and innovation as background of reputation. In this paper, the purpose is to understand the internal reputation-building process carried out by MSMEs and the variables that intervene. Therefore, this research accounts for how MSMEs can build their reputation through innovation and accumulated knowledge. For this, a survey was conducted in 320 orange economy MSMEs located in Bogotá, Colombia, and the relationship of these variables was statistically tested through a quantitative analysis of multivariate data. Innovation was found to not impact the performance of companies, but this can be associated to factors that were not considered in this research. However, it is proposed to refine the original model by considering the manager's perspective. It is recommended that entrepreneurs invest resources in accumulating internal (tacit) knowledge to improve skills that enhance reputation. [ABSTRACT FROM AUTHOR]

Population growth has led to the intensification of average daily traffic (ADT), highlighting vehicles as one of the major sources of heavy metal (HM) pollution in cities. The objective of this paper is to conduct a spatial analysis of the HM pollution associated with road-deposited sediments (RDSs), based on the ADT observed in the main roads of a Latin American megacity (Bogotá, Colombia). The following risk indices were considered: Geoaccumulation Index (Igeo), Integrated Pollution Index (IPI), Ecological Risk Index (ERI), Comprehensive Potential Ecological Risk Index (CERI), Hazard Index (HI), and Carcinogenic Risk Index (CRI). The findings confirm that a size fraction < 250 μm is the most suitable for studying the risk of HMs in the RDS from the indices considered. The best HMs indicative of the relationship with ADT are Ni, Cu, and Pb. The Pb is the HM of most attention, and Cr gains positions for its toxicity level during the evaluation of ecological, non-carcinogenic, and carcinogenic risks, respectively. Finally, the linear regression models developed between ADT and each of the risk indices considered have a better fit (R2 > 0.910) compared to the linear regression models developed between ADT and HM concentrations (R2 > 0.322). [ABSTRACT FROM AUTHOR]

Copyright of Revista Góndola, Enseñanza y Aprendizaje de las Ciencias is the property of Gondola, Ensenanza y Aprendizaje de las Ciencias and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The present paper identifies environmental and industrial safety aspects generated during the production processes of two home appliances companies located in Bogotá. Essential quality tools were used, such as the Deming cycle and some of the seven (7) quality control tools, since it allows a more specific and complete approach to industrial problems. In addition, there is a methodology used to generate preventive strategies in these companies that mitigate workers' health and safety effects and optimize resources, raw materials, and costs (López, 2016). The analysis results evidenced that the companies generate a high environmental impact despite the controls that the department of environmental management takes. The two companies are producing a total of annual waste, reported as follows: 1.188 t that are usable, 1.45 t of non-usable, 2.85t of hazardous matters, 3.15t of waste electrical and electronic equipment (WEEE), as well as NOX, CO2 and VOC atmospheric emissions. Consequently, the environment and the health of workers are affected. In addition, the tools applied demonstrated that the final waste has correct disposal. Finally, the opportunities for business improvement in occupational safety and health and environmental management systems were proposed (Gracia et al, 2018). [ABSTRACT FROM AUTHOR]

This paper presents a critical reflection on insights into the ongoing endeavours for community engagement by Ayara and MAL; two urban grassroot organisations in Bogota, Colombia, where a long history of internal conflicts has resulted in diverse human right violations. The paper presents examples of the grassroots organisations’ unique methods of engagement that promotes building collective intelligence from the bottom–up through creative collaboration and design processes, leading to rebuilding social fabrics that support the common good for the people of Bogota. [ABSTRACT FROM AUTHOR]

Copyright of Territorios: Revista de Estudios Regionales y Urbanos is the property of Universidad de los Andes and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Revista Colombiana de Sociologia is the property of Universidad Nacional de Colombia, Facultad de Ciencias Humanas, Departamento de Sociologia and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Educación y Ciudad is the property of Instituto para la Investigacion Educativa y Desarrollo Pedagogico and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Boletín de la Sociedad Argentina de Botánica is the property of Sociedad Argentina de Botanica and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

This paper attempts to ethnographically reflect on how material vulnerability is conceived and considered in practices of communal sustenance of architectures in trouble. Drawing on theories of maintenance, care, and repair, we will dwell on the learnings cultivated during a socio-material process that unfolded in response to the burning of a communal library in the southern periphery of the city of Bogotá. The collective practices of sustenance deployed to take care of the threatened architecture help us bring to the forefront questions of (I) distributed agency and ecology of practices; (II) unanticipated future and alternative temporalities; (III) creative and generative responses to damage or conflict; as well as (V) tentative and (IV) ‘opening of black boxes’ methods. Through the ethnographic analysis of the disassembling process, we will problematize the socio-material ecosystems needed to sustain lives in a ‘broken world’. [ABSTRACT FROM AUTHOR]

Copyright of Innovar: Revista de Ciencias Administrativas y Sociales is the property of Universidad Nacional de Colombia and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Anales del Seminario de Historia de la Filosofía is the property of Universidad Complutense de Madrid and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Educar is the property of Universitat Autonoma de Barcelona, Servei de Publicacions and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Purpose: This paper seeks to establish an Industry 4.0 maturity model for manufacturing SMEs. This research presents the characteristics of the proposed model, which takes the elements and the scope of the fourth industrial revolution, as well as the dimensions and assessment scales of some maturity models already applied. Likewise, this document shows the modeling process and the model's validation in SMEs in the city of Bogotá-Colombia. Design/methodology/approach: To determine the criteria of the maturity model, 6 major stages have been established: Literature Review, Development of the model; Validation of the model; Application of the model; Data analysis; and Conclusion and Recommendations. Findings: Considering the validation of some maturity models shown in the literature review, and aligned with the purpose of this article, 8 dimensions have been established to measure the maturity level of SMEs: Service; Operations; Quality; Products; Documented information-Big Data; Leadership and strategy; Communication; and Culture and people. A model has been generated that allows evaluating the degree of compliance in each dimension for manufacturing SMEs. The model can be applied to companies in any industry. Also, it can determine the degree of implementation compliance of companies in the same sector. Research limitations/implications: According to the literature reviewed, SMEs, especially those in Latin America, still do not have a culture of applying the elements of Industry 4.0. Therefore, in the research, it was not easy to understand the intrinsic variables of Industry 4.0 that SMEs have applied in different areas, which does not allow us to have the current context of SMEs and from that perspective to have a better simulation of the business model maturity. Practical implications: The model presented in this document serves as a basis for SMEs in Latin America to establish a baseline measurement in relation to the application of Industry 4.0 elements in companies. Social implications: What is intended with this work is to frame a baseline so that companies can understand their current maturity level in terms that industry 4.0 could cover. Likewise, they can generate actions for the appropriation of new technologies that allow them to be more competitive. This document can be taken and applied by those entrepreneurs companies who wish to measure their operations. Originality/value: The essential point for the generation of the maturity level measurement model is focused on determining the necessary dimensions on which the evaluation is based. In the literature found, most models focus their dimensions on measuring the digital in their processes and tangentially evaluate the organizational structure and the relationship between them. Additionally, the authors who address the organization as a whole do not reveal the details for SMEs to self-evaluate. The models found have only been implemented to evaluate one company alone or individually. This model presents the core dimensions holistically and explicitly, taking important criteria such as quality, service, communication, and the culture of all employees. Additionally, it shows in detail the model that allows SMEs of the manufacturing sector to self-assess themselves in each dimension and in turn the degree of the business sector in which they are or belong. [ABSTRACT FROM AUTHOR]

Copyright of Revista Direito GV is the property of Fundacao Getulio Vargas and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

To aim of the paper was to describe the neurological features of the physical examination in patients with Hansen's disease who were treated in Bogotá, Colombia. We carried out a descriptive study of all patients with a Hansen's disease diagnosis treated at a referral center between 2003-2018. There were 327 eligible electronic health records (EHRs) with a final sample of 282 subjects. Leprosy was most common in males (57.45%), median age at the diagnosis was 54 years, and lesions of the lower limbs were more common (75.1%). The median time from disease onset to consult was 12 months. Most of them were classified as having lepromatous leprosy (39.7%). Pain over the median nerve trunk was the most common manifestation of disease (28%), followed by pain over the radial trunk (22%). Sensitive alterations were more common than motor ones. Specifically, the posterior tibial nerve was affected in nearly half of subjects. Dual impairment was more common in the ulnar nerve (13.8%). Some disability was apparent in 23.8% of subjects; predominantly grade 1 disability. Findings regarding age, leprosy type, and the frequency of individual nerve compromise were consistent with reports from other countries. Nerve trunk thickening was infrequent, which might be a consequence of subjectiveness in the examination and sample differences in sex distribution, degree of disability and time since disease onset. The frequency of morbidity and disability found in this sample, though low when compared with other series, fails to meet public health goals, including those limiting disability in younger subjects. [ABSTRACT FROM AUTHOR]

Copyright of Ingeniería Solidaria is the property of Universidad Cooperativa de Colombia and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Purpose: This paper analyses the success factors and barriers of sustainable continuous improvement practices in terms of company's maturity level. The key factors are necessary to establish strategies that reduce the risk of improvement failure and increase the company's maturity level. Design/methodology/approach: The paper presents a multi-case analysis of the success factors in the implementation of continuous improvement. This lead to comparison between the factors identified from the literature review and the practice of the continuous improvement programs in four large successful companies located in Bogota, Colombia applying Bessant's maturity model. Findings: The results identified five success factors and three barriers that companies should consider while implementing sustainable continuous improvement programs. The key success factors are availability of resources; management commitment; employee participation in improvement task identification; clear and realistic objectives; and, finally, existence of a leader. The major barriers are lack of alignment between organizational and continuous improvement objectives; lack of motivation in the team; and, resistance to change. The results confirm that, in spite the high maturity, it is necessary to align the organizational and continuous improvement objectives. Research limitations/implications: Since this research is a multi-case study, it is limited in terms of results generalizability for companies of different sizes, sectors and context. The academic and practical contribution of this paper is providing a better understanding of sustainable continuous improvement practices in Latin-American emerging economies. Originality/value: The present research provides an integral analysis of the key success factors, the barriers, the level of maturity and the behaviours that the companies should implement to achieve the sustainability of continuous improvement in emerging economies such as Colombia. [ABSTRACT FROM AUTHOR]

In this paper, a stochastic epidemiological model is presented as an extension of a compartmental SEIR model with random perturbations to analyze the dynamics of the COVID-19 pandemic in the city of Bogotá D.C., Colombia. This model incorporates the spread of COVID-19 impacted by social behaviors in the population and allows for projecting the number of infected, recovered, and deceased individuals considering the mitigation measures, namely confinement and partial relaxed restrictions. Also, the role of randomness using the concept of Brownian motion is emphasized to explain the behavior of the population. Computational experiments for the stochastic model with random perturbations were performed, and the model is validated through numerical simulations for actual data from Bogotá D.C. [ABSTRACT FROM AUTHOR]

Copyright of Revista Mutis is the property of Revista Mutis and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Theologica Xaveriana is the property of Pontificia Universidad Javeriana and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Confluenze. Rivista di Studi Iberoamericani is the property of Universita di Bologna, Dipartimento di Lingue, Letterature e Culture Moderne and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Territorios: Revista de Estudios Regionales y Urbanos is the property of Universidad de los Andes and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Educación y Ciudad is the property of Instituto para la Investigacion Educativa y Desarrollo Pedagogico and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Revista FORUM is the property of Universidad Nacional de Colombia and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Direito da Cidade is the property of Editora da Universidade do Estado do Rio de Janeiro (EdUERJ) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Dearq is the property of Universidad de los Andes and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Background: Currently, most of the world's population lives in cities, and the rapid urbanization of the population is driving increases in the demand for products, goods and services. To effectively design policies for urban sustainability, it is important to understand the trends of flows in energy and materials as they enter and leave a city. This knowledge is essential for determining the key elements characterizing future urban growth and addressing future supply challenges. Methods: This paper presents an analysis of the energy and material flows in the city of Bogotá over the time span from 2001 to 2017. Urban flows are also characterized in terms of their temporal evolution with respect to population growth to compare and identify the changes in the main input flows, wealth production, emissions and waste in the city. Results: The results of the analysis are then compared with those for other selected large urban agglomerations in Latin America and worldwide to highlight similarities and make inferences. The results show that in Bogotá, there was a decrease in some of the material flows, such as the consumption of water and the generation of discharge, in recent years, while there was an increase in the consumption of energy and cement and in the production of CO2 emissions and construction materials. Solid waste production remained relatively stable. With respect to the other large cities considered, we observe that the 10-year growth rates of the flows with respect to population growth are lower in Bogotá, particularly when compared with the other urban agglomerations in Latin America. Conclusions: The findings of this study are important for advancing characterizations of the trends of material and energy flows in cities, and they contribute to the establishment of a benchmark that allows for the definition and evaluation of the different impacts of public policy while promoting the sustainability of Bogotá in the coming decades. [ABSTRACT FROM AUTHOR]

Copyright of Cuadernos de Geografia: Revista Colombiana de Geografía is the property of Universidad Nacional de Colombia and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

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Copyright of Profile: Issues in Teachers' Professional Development is the property of Universidad Nacional de Colombia, Facultad de Ciencias Humanas and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Brazilian Journal of Management / Revista de Administração da UFSM is the property of Brazilian Journal of Management / Revista de Administracao da UFSM and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

This paper explores the use of biochar obtained from the pyrolysis of Ulex Europaeus, an invasive species in the mountain ecosystems of Colombia, for the removal of total chromium from the water. The investigation was developed in two phases. First, the slow pyrolysis of Ulex Europaeus was carried out at varying temperatures (450, 550, and 650° C) to produce a biochar that was characterized by texture, surface area, and percent yield. In the second phase, the biochar then was used to test the removal of chromium from natural water samples collected from the Upper Bogotá River Basin. The removal of chromium with a commercial activated carbon also was assessed as a control. Finally, measurements of total chromium collected were used to evaluate biochar removal efficiencies. The biochar produced at both 550° C and 650° C was found to remove over two times the amount of chromium compared the activated carbon, demonstrating that biochar from Ulex Europaeus is an effective sorbent for total chromium. [ABSTRACT FROM AUTHOR]

Copyright of Linguistica (1132-0214) is the property of Asociacion de Linguistica y Filologia de la America Latina and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Dearq is the property of Universidad de los Andes and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The transmission dynamics of the coronavirus—COVID-19—have challenged humankind at almost every level. Currently, research groups around the globe are trying to figure out such transmission dynamics under special conditions such as separation policies enforced by governments. Mathematical and computational models, like the compartmental model or the agent-based model, are being used for this purpose. This paper proposes an agent-based model, called INFEKTA, for simulating the transmission of infectious diseases, not only the COVID-19, under social distancing policies. INFEKTA combines the transmission dynamic of a specific disease, (according to parameters found in the literature) with demographic information (population density, age, and genre of individuals) of geopolitical regions of the real town or city under study. Agents (virtual persons) can move, according to its mobility routines and the enforced social distancing policy, on a complex network of accessible places defined over an Euclidean space representing the town or city. The transmission dynamics of the COVID-19 under different social distancing policies in Bogotá city, the capital of Colombia, is simulated using INFEKTA with one million virtual persons. A sensitivity analysis of the impact of social distancing policies indicates that it is possible to establish a 'medium' (i.e., close 40% of the places) social distancing policy to achieve a significant reduction in the disease transmission. [ABSTRACT FROM AUTHOR]

IoT environments are continuously changing. Changes may come from the service, connectivity, or physical layers of the IoT architecture. Therefore, to function appropriately, the system needs to dynamically adapt to its environment. In previous work, we posited eight challenges to foster adaptation through all architecture layers of IoT systems. In this paper, we address the challenges to manage the inclusion of new devices and devices' transient connection , by means of dynamic adaptations incorporated into our proposed software architecture for adaptive IoT systems. To manage dynamic adaptations, we extend the reference IoT architecture with our specialized components. In particular, we use (1) ontologies and instances to represent the domain knowledge; (2) a matching algorithm to pair services and IoT devices, taking into account their functional requirements, quality attributes and sensors properties; and (3) a match update algorithm used whenever sensors become (un)available. We evaluate the effectiveness of our solution with respect to the accuracy of matching services and IoT devices, and the response to environment changes. • This paper presents a new adaptive architecture for IoT Systems. • Ontology matching algorithm-based architecture to manage transient connections. • Functional, non-functional, and QoS matching algorithm between IoT components. • Matching algorithm with better precision and recall compared with the gold-standard. • Architecture deployed in a real case study for a SUDS system in the city of Bogotá. [ABSTRACT FROM AUTHOR]

Copyright of Praxis Pedagogica is the property of Corporacion Universitaria Minuto de Dios and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Colombian Applied Linguistics Journal is the property of Colombian Applied Linguistics Journal and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Nomadas (01217550) is the property of Universidad Central and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Profile: Issues in Teachers' Professional Development is the property of Universidad Nacional de Colombia, Facultad de Ciencias Humanas and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Traffic accidents are of worldwide concern, as they are one of the leading causes of death globally. One policy designed to cope with them is the design and deployment of road safety systems. These aim to predict crashes based on historical records, provided by new Internet of Things (IoT) technologies, to enhance traffic flow management and promote safer roads. Increasing data availability has helped machine learning (ML) to address the prediction of crashes and their severity. The literature reports numerous contributions regarding survey papers, experimental comparisons of various techniques, and the design of new methods at the point where crash severity prediction (CSP) and ML converge. Despite such progress, and as far as we know, there are no comprehensive research articles that theoretically and practically approach the model selection problem (MSP) in CSP. Thus, this paper introduces a bibliometric analysis and experimental benchmark of ML and automated machine learning (AutoML) as a suitable approach to automatically address the MSP in CSP. Firstly, 2318 bibliographic references were consulted to identify relevant authors, trending topics, keywords evolution, and the most common ML methods used in related-case studies, which revealed an opportunity for the use AutoML in the transportation field. Then, we compared AutoML (AutoGluon, Auto-sklearn, TPOT) and ML (CatBoost, Decision Tree, Extra Trees, Gradient Boosting, Gaussian Naive Bayes, Light Gradient Boosting Machine, Random Forest) methods in three case studies using open data portals belonging to the cities of Medellín, Bogotá, and Bucaramanga in Colombia. Our experimentation reveals that AutoGluon and CatBoost are competitive and robust ML approaches to deal with various CSP problems. In addition, we concluded that general-purpose AutoML effectively supports the MSP in CSP without developing domain-focused AutoML methods for this supervised learning problem. Finally, based on the results obtained, we introduce challenges and research opportunities that the community should explore to enhance the contributions that ML and AutoML can bring to CSP and other transportation areas. [ABSTRACT FROM AUTHOR]