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Speckle reduction in echocardiography by temporal compounding and anisotropic diffusion filtering
(SPIE, 2015)Echocardiography is a medical imaging technique based on ultrasound signals that is used to evaluate heart anatomy and physiology. Echocardiographic images are affected by speckle, a type of multiplicative noise that ... -
Speed of International Expansion: The Mediating Role of Network Resources Mobilisation
(Cartagena de Indias, 2022-08)Multinational Enterprises (MNEs) are often under pressure to expand at the highest possible speed in international markets. They therefore embed themselves in networks of alliances where they can access resources in the ... -
SPUD: Simultaneous phase unwrapping and denoising algorithm for phase imaging
(Cartagena de Indias, 2020-05-01)Recent methods for phase unwrapping in the presence of noise include denoising algorithms to filter out noise as a preprocessing stage. However, including a denoising stage increases the overall computational complexity ... -
Spurring or Blurring Journalism & Mass Communication Quarterly 1–32 © 2024 AEJMC Professional Standards? The Role of Digital Technology in Implementing Journalistic Role Ideals in Contemporary Newsrooms
(Cartagena de IndiasComunicación Social, 2024-06-22)This study examines the perceived relevance and implementation of competing normative ideals in journalism in times of increasing use of digital technology in newsrooms. Based on survey and content analysis data from 37 ... -
Stability Analysis of Single-Phase Low-Voltage AC Microgrids with Constant Power Terminals
(Institute of Electrical and Electronics Engineers Inc., 2019)This express brief presents the stability analysis of single-phase microgrids (SP-MG) operating under master-slave connection with constant power terminals. The SP-MG is composed of linear elements, nonlinear loads, and ... -
Stabilization of MT-HVDC grids via passivity-based control and convex optimization
(Cartagena de Indias, 2021-04-30)This paper presents a model for stabilizing multi-terminal high voltage direct-current (MT-HVDC) networks with constant power terminals (CPTs) interfaced with power electronic converters. A hierarchical structure of ... -
Standard passivity-based control for multi-hydro-turbine governing systems with surge tank
(Elsevier Inc., 2020)This paper addresses the problem of control design for hydro-turbine governing systems with surge tanks from the perspective of standard passivity-based control. The dynamic model of a synchronous machine is considered in ... -
State-of-the-art active optical techniques for three-dimensional surface metrology: a review [Invited]
(Campus TecnológicoIngeniería Mecatrónica, 2020)This paper reviews recent developments of non-contact three-dimensional (3D) surface metrology using an active structured optical probe. We focus primarily on those active non-contact 3D surface measurement techniques that ... -
State-of-the-art green roofs: Technical performance and certifications for sustainable construction
(Cartagena de Indias, 2020-01-13)Green roof systems, a technology which was used in major ancient buildings, are currently becoming an interesting strategy to reduce the negative impact of traditional urban development caused by ground impermeabilization. ... -
Static secure page allocation for light-weight dynamic information flow tracking
(2012)Dynamic information flow tracking (DIFT) is an effective security countermeasure for both low-level memory corruptions and high-level semantic attacks. However, many software approaches suffer large performance degradation, ... -
Stationary axially symmetric relativistic thin discs with nonzero radial pressure
(2012)A detailed analysis of the surface energymomentum (SEMT) tensor of stationary axially symmetric relativistic thin discs with nonzero radial pressure is presented. The physical content of the SEMT is analysed and expressions ... -
Stationary-state analysis of low-voltage DC grids
(Cartagena de Indias, 2021-01-01)The optimal power flow is a classic method for alternating current networks, which can also be applied to direct current networks. However, it is needed to design new methods that guarantee convergence and global optimum. ... -
Statistical Approach for Computing Base Flow Rates in Gaged Rivers and Hydropower Effect Analysis
(Cartagena de Indias, 2023-06-27)The calculation of base flow rates in rivers is complex since hydrogeological and hydrological studies should be performed. The estimation of base flow rates in storm hydrograph associated to various return periods is ... -
Steric and chain length effects in the (√(3) × √(3))R30° structures of alkanethiol self-assembled monolayers on Au(111)
(Wiley-VCH Verlag, 2011)The translational and orientational potential energy surfaces (PESs) of n-alkanethiols with up to four carbon atoms are studied for (√(3) × √(3))R30° self-assembled monolayers (SAMs). The PESs indicate that methanethiol ... -
Strategic direction: Projection of technological innovation and administrative management in small enterprises
(Centro de Informacion Tecnologica, 2017)The main objective of this research is to establish the level of innovation in technology and strategic direction of small and medium size enterprises (SMEs) in the city of Barranquilla, Colombia. For this purpose, a ... -
Strategies for the improvement of research competences in the professional training of engineers
(Cartagena de Indias, 2021-11-01)The objective of this study is proposing strategies to strengthen research competencies needed by engineers in training. An analytical, situation research was conducted in four Engineering programs from a public university ... -
Student Entrepreneurship and Innovation Competition
(Cartagena de Indias, 2022-12)Consuming food with high nutritional value, reducing the negative impacts that indiscriminate cultivation causes in nature, and the low competitiveness of farming families against agricultural industries, are issues that ... -
Studies of Endocrine Disruptors: Nonylphenol and Isomers in Biological Models
(Cartagena de IndiasCampus TecnológicoIngeniería Ambiental, 2023-04-14)Abstract Certain emerging pollutants are among the most widely used chemicals globally, causing widespread concern in relation to their use in products devoted to cleaniness and asepsis. Nonylphenol ethoxylate (NPEOn) is ... -
Study of early P91 dual corrosion in steam and simulated combustion gases from a gas-fired boile
(Cartagena de Indias, 2021-07-25)P91 ferritic steel pipes face dual environments during boilers operation: steam-side and fire-side. This P91 steel assessment differs from the dual studies performed to simulate coal-fired boilers -oxyfuel/steam atmospheres- ... -
Study of the Chemical Activities of Carbon Monoxide, Carbon Dioxide, and Oxygen Traces as Critical Inhibitors of Polypropylene Synthesis
(Cartagena de IndiasCampus Tecnológico, 2024-02-23)This study outlines the investigation into how the compounds CO2 , CO, and O2 interact with the active center of titanium (Ti) on the surface of MgCl2 and how these interactions impact the productivity of the Ziegler–Natta ...
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.