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Purpose: This paper aims to find the incidence of university sustainability, as sustainability practices, in university performance at private universities. Design/methodology/approach: Quantitative research using structural equation modelling. Data collection and analysis followed sustainability and performance scales from previous research. The scales were validated by surveying students, teachers and administrative staff of five private universities in Medellin, Colombia. The responses (i.e. 5,344 useful answers) were collected between April 2019 and December 2020 and analysed using the Smart partial least square (PLS) software and the PLS calculation methodology. Findings: The results confirmed the reliability and validity of the sustainability and performance university measurement models and validated the dimensions proposed to determine sustainability and performance holistically in private universities. The results confirmed that universities implementing sustainability holistically in their system positively impact their performance as higher education institutions. The university sustainability is forecasting the University Performance in about 60% of the universities analysed, with a considerable contribution from sustainability in outreach and strategic management. Research limitations/implications: This study was cross-sectional and empirically validated the model of sustainability and performance at five private universities in a single period and territory. A broader validation from longitudinal studies considering other universities in Colombia and Latin America is suggested to understand local and regional trends better. Practical implications: Results provided a model for better understanding the incidence of sustainability in performance holistically at private universities in developing countries such as Colombia. In addition, the proposed dimensions and model could help regional decision-making on higher education. Originality/value: To the best of the authors' knowledge, this paper is one of the first attempts relating a structural equation model and inter-university research on the incidence of sustainability in private university performance. This work contributes to a local consensus on sustainability and performance models at private universities. Furthermore, from this research emerged a joint policy framework for incorporating sustainability holistically and regionally as an effective strategy for universities and their commitment to sustainable development. [ABSTRACT FROM AUTHOR]

Purpose: This paper aims to develop a stable gel-type lubricant emulating commercial conditions. This encompassed rheological and tribological assessments, alongside field trials on the Medellín tram system. Design/methodology/approach: The gel-type lubricant with graphite and aluminum powder is synthesized. Rheological tests, viscosity measurements and linear viscoelastic regime assessments are conducted. Subsequently, tribological analyses encompassing four-ball and twin disc methods are executed. Finally, real-world testing is performed on the Medellín tram system. Findings: An achieved lubricant met the stipulated criteria, yielding innovative insights into the interaction of graphite and aluminum powder additives under varying tests. Originality/value: Novel findings are unveiled regarding the interaction of graphite and aluminum powder additives in tribological, rheological and real-world trials. In addition, the wear behavior of polymers is observed, along with the potential utilization of such additives in tramway systems. [ABSTRACT FROM AUTHOR]

Purpose: The purpose of this paper was exploring and comparing different deterioration models based on statistical and machine learning approaches. These models were chosen from their successful results in other case studies. The deterioration models were developing considering two scenarios: (i) only the age as covariate (Scenario 1); and (ii) the age together with other available sewer characteristics as covariates (Scenario 2). Both were evaluated to achieve two different management objectives related to the prediction of the critical condition of sewers: at the network and the sewer levels. Design/methodology/approach: Six statistical and machine learning methods [logistic regression (LR), random forest (RF), multinomial logistic regression, ordinal logistic regression, linear discriminant analysis and support vector machine] were explored considering two kinds of predictor variables (independent variables in the model). The main propose of these models was predicting the structural condition at network and pipe level evaluated from deviation analysis and performance curve techniques. Further, the deterioration models were exploring for two case studies: the sewer systems of Bogota and Medellin. These case studies were considered because of both counts with their own assessment standards and low inspection rate. Findings: The results indicate that LR models for both case studies show higher prediction capacity under Scenario 1 (considering only the age) for the management objective related to the network, such as annual budget plans; and RF shows the highest success percentage of sewers in critical condition (sewer level) considering Scenario 2 for both case studies. Practical implications: There is not a deterioration method whose predictions are adaptable for achieving different management objectives; it is important to explore different approaches to find which one could support a sewer asset management objective for a specific case study. Originality/value: The originality of this paper consists of there is not a paper in which the prediction of several statistical and machine learning-based deterioration models has been compared for case studies with different local assessment standard. The above to find which is adaptable for each one and which model is adaptable for each management objective. [ABSTRACT FROM AUTHOR]

Purpose: This paper aims to find answers to two research questions: What is the perception of the Moravia community on tourism in their neighbourhood? What are the conditions under which they can accept slum tourism? Design/methodology/approach: The foundation of this paper was laid during a field trip to Medellin, Colombia, in March 2018. More than three weeks were spent in the neighbourhood of Moravia, one of Medellin's "barrios" or slums, where a qualitative study was led. Semi-structured interviews with the local community were done around the neighbourhood. Findings: The main finding of this research is the positive perception of slum tourism within the Moravia community. The researchers found that the locals are proud when outsiders visit to see their neighbourhood. The locals felt that, it breaks the prejudice surrounding their homes, and tourists are seen as spokespeople for the barrio. There are visible improvements made to the barrio owing to tourism. This research drew attention to the conditions under which this type of tourism can be accepted in the neighbourhood: community participation, interaction between hosts and tourists, education and respect of tourists and the visible improvements to the neighbourhood. Originality/value: Slum tourism is an understudied topic in Colombia, especially in Medellin. By researching on the host perception on slum tourism, this paper contributes to literature on slum tourism from a new angle. [ABSTRACT FROM AUTHOR]

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Purpose: We explore and explain how academic organizations attempt to establish legitimacy in a transition to a postconflict context, and we examine the ethical challenges that emerge from insightful approaches to formal education in such contexts. Design/methodology/approach: We use legitimacy theory to present a case study of a business school in Medellin, Colombia (herein referred to by the pseudonym BS-MED) in the empirical setting of the end of the most prolonged armed conflict in the world. Findings: We identify the mechanisms implemented by BS-MED to comply with the Colombian government's peace process and rhetoric of business profitability and the faculty members' initiatives in response to social and academic tensions. Originality/value: This study identifies the sources of the tensions and discrepancies between the regulatory and pragmatic versus moral and cultural-cognitive criteria of legitimacy in transitions to a postconflict context. This examination advances our understanding of the challenges that organizations face regarding changes to legitimacy over time. The extreme setting of our case positions academics as key players who lead the search for legitimacy. This study challenges the understandings of legitimacy in the literature on organizations, which rarely consider broader sociopolitical transitions to a peace context. [ABSTRACT FROM AUTHOR]