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  Item type:Ítem,

  Análisis comparativo del clima organizacional como factor determinante en la gestión humana: Estudio documental en empresas del sector servicios en Bogotá D.C.

  (Universidad Distrital Francisco José de Caldas)

  Santana Barbosa, María Alejandra

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  Guerrero Salas, Humberto

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  Guerrero Salas,Humberto[0000-0002-5795-8071]

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  This monograph presents a comparative, document-based analysis of organizational climate as a determining factor in human resource management practices within service-sector companies in Bogotá, D.C. Based on a systematic, qualitative review of specialized secondary sources, scientific articles, and institutional reports, the study characterizes key theoretical dimensions of the work environment—such as internal communication, leadership, motivation, employee well-being, and psychosocial risk management—and contrasts their manifestation across two business profiles representative of the sector in the Colombian capital. The research employs a strictly bibliographic methodological design structured in five phases: systematic literature review, profile characterization, comparative analysis, synthesis of recommendations, and structuring of the diagnosis. To support and systematize the theoretical and conceptual framework, a comprehensive and robust Excel matrix was created, compiling bibliographic citations, methodologies, analyzed dimensions, and key findings from each source consulted. The results demonstrate that the level of structure and strategic maturity of human resource management practices directly influences the stability and quality of the organizational climate. The study concludes that strengthening two-way communication channels, training middle management in participatory leadership, and actively monitoring psychosocial risks are fundamental pillars for enhancing job satisfaction and performance within the service sector. Keywords: Organizational climate, human resource management, service sector, comparative analysis, document-based study, Bogotá D.C.

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  Item type:Ítem,

  Uso sostenible de biomasa residual de café para el tratamiento de aguas contaminadas con plaguicidas

  (Universidad Distrital Francisco José de Caldas)

  Camargo Losada, Alan Alberto

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  Sarmiento Monsalve, Jeymy Tatiana

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  Sarmiento Monsalve, Jeymy Tatiana [0000-0002-5994-8387]

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  The generation of agro-industrial waste is an environmental problem associated with the management and disposal of materials that could be used as raw materials for the development of new value-added products. In this context, coffee husk represents a waste material with potential for transformation into biochar due to its lignocellulosic composition. On the other hand, the contamination of water bodies by agrochemical compounds requires the development of efficient and sustainable alternatives for their removal, with adsorption being a widely used strategy for this purpose. For this study, biochar obtained from coffee husk was developed and characterized using different thermal treatment methods and acetic acid as an activating agent, with the aim of evaluating its potential as an adsorbent material. Additionally, magnetic properties were incorporated into the biochar through the addition of iron oxides, seeking to facilitate its recovery after the adsorption process and promote its reuse. The performance of the materials obtained was evaluated based on their Captan retention capacity as a model contaminant. The physicochemical characterization identified modifications in the surface structure and functional groups of the materials obtained through the different treatments. Likewise, iodine number and methylene blue tests revealed porosity characteristics associated with their adsorption capacity. In the evaluation against Captan, the biochar obtained through the conventional method exhibited an initial retention of 79%, whereas the material obtained through the microwave method reached 21%. However, after magnetic modification, the retention of the conventional biochar increased to 85%, while the microwave biochar showed a considerable increase, reaching 76%. Additionally, the incorporation of magnetic properties facilitated the recovery of the materials using a magnetic field and enabled their behavior during reuse processes to be evaluated. The results demonstrate that the valorization of coffee husk, combined with chemical activation and magnetic modification processes, represents a promising strategy for the development of recoverable adsorbent materials. Although the microwave-produced biochar did not initially exhibit the best performance against Captan, its favorable response to magnetic modification and its behavior during reuse demonstrate opportunities for further optimization of the material’s synthesis and modification conditions. Thus, this study proposes an alternative focused on the sustainable utilization of agro-industrial waste and the development of adsorbents with recovery and reuse potential.

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  Síntesis y evaluación de las propiedades fotofísicas de pirazoles e isoxazoles derivados de tetralona

  (Universidad Distrital Francisco José de Caldas)

  Forero Jimenez, Paola Katherine

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  Sarmiento Monsalve, Jeymy Tatiana

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  Sarmiento Monsalve, Jeymy Tatiana [0000-0002-5994-8387]

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  In this work, N-heterocyclic compounds derived from tetralone of structural interest were synthesized, and their photophysical properties were studied. Initially, β-enaminones derived from 1-tetralone and 6-methoxy-1-tetralone were obtained through microwave-assisted reactions. Subsequently, these β-enaminones were used as precursors for the synthesis of pyrazole derivatives 3a–d and isoxazole derivatives 3e,f through cyclocondensation reactions. The products were then subjected to a dehydrogenation process using 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ), aimed at forming the corresponding aromatic derivatives 4a–f. Finally, two of the aromatized pyrazole derivatives 4a,b were functionalized through an N-acetylation reaction, affording compounds 5a,b. The structural characterization of the compounds was performed by ¹H and ¹³C NMR spectroscopy, DEPT-135, and two-dimensional experiments such as COSY, HSQC, HMBC, and NOESY, complemented by HSMS-ESI. The products 3a–f were obtained in yields ranging from 59 to 86%, their aromatized analogues 4a–f in yields of 35–88%, and the acetylated derivatives 5a,b in yields of 60–77%. The photophysical study was carried out by absorption and fluorescence spectroscopy in solvents with different polarities, such as toluene, dichloromethane, and acetonitrile. The dihydro derivatives 3c–f exhibited absorption bands between 269 and 290 nm, whereas in the heteroarenes 4c–f, the absorption bands shifted to 316–322 nm, which is associated with an increase in conjugation in these compounds. The acetylated derivatives 5a,b showed bands around 350 nm due to intramolecular charge-transfer processes. Regarding emission, the isoxazole dihydro derivatives exhibited low fluorescence quantum yields (Φꜰ ≤ 5.02%) due to non-radiative processes, which improved in the heteroarenes 4c,d (Φꜰ ≤ 21%) but was higher in the acetyl derivatives 5a,b (Φꜰ = 34–58%). In particular, 5b exhibited the highest fluorescence quantum yield among all the compounds studied (58%). DFT calculations of the optimized geometry were performed to gain insight into the electronic behavior of 5b, where its HOMO and LUMO frontier orbitals exhibit a differentiated electron distribution across the donor and acceptor fragments, consistent with a donor–acceptor “push–pull” molecular system with intramolecular charge transfer. Overall, the results allowed the structure–property relationship of the studied azoles to be explored, in which structural modifications, such as the incorporation of electron-donating groups and changes in the electronic state, can modify their photophysical behavior and provide elements for the design of heterocyclic molecules with tunable or modular optoelectronic properties.

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  Ecos y ausencias, una etnografía visual de la memoria rural en Sutatenza, Boyacá

  (Universidad Distrital Francisco José de Caldas)

  Paredes Quiroga, Katherine Julieth

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  Vanegas Flórez, Guillermo Alexander

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  Guillermo Alexander Vengas Flórez [0000-0002-9675-1292]

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  This degree project aims to recount, contextualize, and shed light on the issue of the abandonment of vulnerable elderly people in the rural area of ​​Sutatenza, Boyacá, through a visual historical ethnography. It employs a chronological analysis of distance-based popular education initiatives—specifically Radio Sutatenza and ACPO (Acción Cultural Popular)—examining their foundations, history, and social, economic, and cultural impacts. The goal is to highlight the recognition of reparation processes and the fundamental role the peasantry plays in societal development and construction. The central research questions addressed and explored throughout this project are: What became of the Sutatenza community following the era of ACPO and Radio Sutatenza? What was the ultimate outcome of the recognition gained, and how did it manifest in the region's and community's current context? To translate these themes into a visual and artistic form, a large-format diorama installation has been created using two-dimensional, three-dimensional, and video elements; this is accompanied by a photobook compiling the visual record gathered from the project's inception in 2021 through to the present day, 2026.

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  Fanstore

  (Universidad Distrital Francisco José de Caldas)

  Acosta Bejarano, Jose Martin

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  Caranton Cubillos, Andrea Valentina

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  Solano Villamizar, Freddy Giovanni

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  The FAN STORE business model distinguishes itself from current informal market offerings by incorporating a professional management system that ensures high-quality handling of sportswear. Unlike other merchants who focus solely on selling low-cost items without prioritizing quality or durability, our model is built on transparency and the reliability of the sportswear, while offering accessible prices for fans. The business model will operate primarily through digital channels, utilizing social media platforms for promotion, customer service, and product sales. The company will not focus on direct garment manufacturing but rather on selecting suppliers who meet pre-established criteria regarding quality, design, comfort, and durability. FAN STORE’s value proposition lies in offering sportswear with a strong price-to-quality ratio, supported by a secure purchasing process, personalized customer service, and transparent information (Osterwalder & Pigneur, 2011).

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