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Mostrando ítems 1327-1346 de 1445
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The maximal subspace for generation of (a,k)-regularized families
(2012)Let A be a linear operator in a Banach space X. We define a subspace of X and a norm such that the part of A in such subspace generates an (a, k)-regularized resolvent family. This space is maximal-unique in a suitable ... -
The notion of Kierkegaardian conscience as an implication of the outside world: A critique of the Cartesian approach
(Universidad del Norte, 2019)This article aims at showing how the Danish philosopher SØren Kierkegaard, through his concept of conscience, criticizes Cartesian skepticism upon affirming the impossibility of doubting the outside world, since the very ... -
The origin of Humboldt and Bonpland's holotype of Oncidium ornithorhynchum, clarified using +200-year-old DNA
(John Wiley and Sons Inc., 2019)Oncidium ornithorhynchum, an epiphytic orchid characterized by erect, pyramidal inflorescences and small yellow flowers, is found in the northern Andes. However, according to the protologue, the type was collected in Mexico ... -
The potential that ethical finance has to generate new investment alternatives in Colombia
(2008)This article examines the need for and the opportunity of developing ethical finance initiatives, specifically ethical banks and ethical investment funds, as alternatives to strengthen development in Colombia. The validity ... -
The protection of the cultural heritage of galician emigration in cartagena de Indias (Colombia). Reflections on the conservation of casa galicia
(Cartagena de Indias, 2020)Casa Galicia of Cartagena de Indias (Colombia) is an element of the cultural heritage of this city that used to represent the success of its builders, a Galician emigrant family of the beginning of the 20th century. By ... -
The rider behavior questionnaire to explore associations of motorcycle taxi crashes in Cartagena (Colombia)
(Cartagena de Indias, 2021-08-16)Objective: This study aimed to identify the association between behavioral factors and crashes of motorcycle taxi riders using the Motorcycle Rider Behavior Questionnaire (MRBQ). Methods: This study was a cross-sectional ... -
The role of energy storage and cross-border interconnections for increasing the flexibility of future power systems : the case of Colombia
(Cartagena de Indias, 2021-04-20)The rapid expansion of renewable energy technologies in the electricity sector introduces new significant challenges for power systems due to their high intermittency. Therefore, more flexibility is needed to ensure that ... -
The role of women in Rainbow of Peace, by Fray Pedro de Santa María y Ulloa
(Universidad Nacional de Educacion a Distancia, 2017)This article analyzes the role of women and the Virgin Mary in the vision of the Dominican friar of the XVII century, Fray Pedro de Santa María y Ulloa, the highest representative of the devotion to the Marian prayer in ... -
The societal context of professional practice: Examining the impact of politics and economics on journalistic role performance across 37 countries
(Cartagena de IndiasCampus TecnológicoComunicación Social, 2024-01-30)The impact of socio-political variables on journalism is an ongoing concern of comparative research on media systems and professional cultures. However, they have rarely been studied systematically across diverse cases, ... -
The state of optics research in Colombia: a scientometric analysis
(Cartagena de Indias, 2022-03-05)Although there is a perception in the community that the state of optics research in Colombia has reached a mature state with international recognition, to date, there is no study that supports this view quantitatively. We ... -
The use of infrared spectroscopy and machine learning tools for detection of Meloidogyne infestations
(Cartagena de Indias, 2020-08-01)Plant parasitic nematodes are generally soilborne pathogens that attack plants and cause economic losses in many crops. The infested plants show nonspecific symptoms or, often, are symptomless; therefore, diagnosis is ... -
Theoretical–Experimental Study of the Action of Trace Amounts of Formaldehyde, Propionaldehyde, and Butyraldehyde as Inhibitors of the Ziegler–Natta Catalyst and the Synthesis of an Ethylene–Propylene Copolymer
(Cartagena de IndiasCampus Tecnológico, 2023-02-22)The copolymer synthesis process can be affected by failures in the production process or by contaminating compounds such as ketones, thiols, and gases, among others. These impurities act as an inhibiting agent of the ... -
Thermal Analysis of a Parabolic Trough Collectors System Coupled to an Organic Rankine Cycle and a Two-Tank Thermal Storage System: Case Study of Itajubá-MG Brazil
(Cartagena de IndiasCampus Tecnológico, 2022-11-04)settingsOrder Article Reprints Open AccessArticle Thermal Analysis of a Parabolic Trough Collectors System Coupled to an Organic Rankine Cycle and a Two-Tank Thermal Storage System: Case Study of Itajubá-MG Brazil by ... -
Thermal and Morphological Characterization of Native and Plasticized Starches of Sweet Potato (Ipomoea batatas) and Diamante Yam (Dioscorea rotundata)
(Cartagena de Indias, 2020-09-18)The objective of this study is to determine the morphological, physicochemical, and thermal properties of starches from two species of tubers, Ipomoea batatas (SP) and Dioscorea rotundata (DY), as well as the influence of ... -
Thermal Energy Replacement Potential in a Slaughter Plant From Rumen Pellets
(Cartagena de IndiasCampus Tecnológico, 2020-11-19)In this work, steam generation was studied using natural gas or rumen as energy sources in a slaughter plant that sacrifices 7500 cattle per month, with consumption 0.5749 kg/s of saturated steam at 624 kPa. For a slaughtered ... -
Thermoeconomic analysis of pvc production plant reactors cooling system
(American Society of Mechanical Engineers (ASME), 2017)In this work the results of the research made to PVC production plant reactors cooling system are included. The heat generated in the reactor must be removed to maintain its temperature at an optimal range between 50 and ... -
Thermoeconomic analysis of wheat flour agroindustrial plant
(American Society of Mechanical Engineers (ASME), 2015)This paper presents the development of an exergy and thermoeconomic analysis of a wheat flour agro-industrial plant, which was aimed to evaluate the energy use and establish the operation cost of its components, and to ... -
Thermoeconomic indicators ofair conditioning in a river ship to change the configuration of their thermal insulation
(American Society of Mechanical Engineers (ASME), 2014)This work has as object of study the energy of a river ship air conditioning system performance, using fiberglass, polyurethane or rockwool as insulation. Thermoeconomics Indicators based on second law of thermodynamics ... -
Thermoplastic Starch (TPS)/Polylactic Acid (PLA) Blending Methodologies: A Review
(Cartagena de IndiasCampus TecnológicoIngeniería Mecánica, 2021-06-17)Polylactic acid (PLA) and thermoplastic starch (TPS) are biodegradable polymers of biological origin, and the mixture of these polymers has been studied due to the desirable mechanical properties of PLA and the low processing ... -
Three-dimensional analysis of air-admission orifices in pipelines during hydraulic drainage events
(Cartagena de Indias, 2022-11-07)Air valves operate as protection devices in pipelines during drainage processes in order to mitigate vacuum pressures and control the transient flows. Currently, different authors have proposed one-dimensional models to ...
Universidad Tecnológica de Bolívar - 2017 Institución de Educación Superior sujeta a inspección y vigilancia por el Ministerio de Educación Nacional. Resolución No 961 del 26 de octubre de 1970 a través de la cual la Gobernación de Bolívar otorga la Personería Jurídica a la Universidad Tecnológica de Bolívar.