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Large-scale Cosmic-Ray Anisotropies above 4 EeV Measured by the Pierre Auger Observatory
No full textAnalysis of floodplain dynamics in the Atrato River Colombia using SAR interferometry
No full textFloodplain water flows have large volumetric flowrates and high complexity in space and time that are difficult to understand using water level gauges. We here analyze the spatial and temporal fluctuations of surface water flows in the floodplain of the Atrato River, Colombia, in order to evaluate their hydrological connectivity. The basin is one of the rainiest areas of the world with wetland ecosystems threatened by the expansion of agriculture and mining activities. We used 16 Differential Interferometric Synthetic Aperture Radars (DInSAR) phase observations from the ALOS-PALSAR L-band instrument acquired between 2008-2010 to characterize the flow of surface water. We were able to observe water level change in vegetated wetland areas and identify flooding patterns. In the lower basin, flow patterns are conditioned by fluctuations in the levels of the main river channel, whereas in the middle basin, topography and superficial channels strongly influence the flow and connectivity. We found that the variations in water level in a station on the main channel 87 km upstream explained more than 56% of the variations in water level in the floodplain. This result shows that, despite current expansion of agriculture and mining activities, there remain significant hydrological connectivity between wetlands and the Atrato River. This study demonstrates the use of DInSAR for a spatially comprehensive monitoring of the Atrato River basin hydrology. For the first time, we identified the spatiotemporal patterns of surface water flow of the region. We recommend these observations serve as a baseline to monitor the potential impact of ongoing human activities on surface water flows across the Atrato River basin. © 2019 by the authors
Gamified Strategy Oriented to Decrease SPI Change Resistance: A Case Study
No full textSoftware development companies seek to improve their processes implementing best practices through SPI initiatives. Such initiatives look for modifying the conditions and behavior of the process stakeholders. For this reason, change resistance increases the complexity of the SPI initiatives implementation; and exist a permanent search of strategies for facing with change resistance. Gamification is an alternative for influencing employee behavior, allowing them to improve the SPI initiatives. With this motivation, this paper shows a case study of the application of a gamified strategy oriented to decrease change resistance. The methodology for the strategy definition includes a sequence of steps for selecting and associating change resistance causes, change management models, and gamification principles. The study case evidences a positive impact on causes like lack of commitment management and a general improvement in the change resistance in SPI initiatives when the gamification is the central element of the strategy. © 2020, Springer Nature Switzerland AG
A new corporate entrepreneurship knowledge schema as a research field
No full textSome authors have recognized the study of corporate entrepreneurship as an organizational growth strategy favored by employee creativity and innovation. This study seeks to review and synthesize the current status of research, understanding corporate entrepreneurship as a research field and not as a simple construct. To this effect, bibliometric analysis has been conducted on literature, indexed by Web of Science for the past 15 years (2001-2016) using the VOS viewer version 1.6.4 software. The study sample corresponds to 556 works studied through a concurrency analysis of terms that originates a network of 87 terms with a minimum concurrency of 14, and supports the construction of a conceptual corporate entrepreneurship model. Later on, this conceptual map is being verified at an empirical level through quantitative structural equations and qualitative technics by Gioia's method. To finally propose a conceptual framework triggered by stakeholders' needs and synthesized through collaborators or employees, as a system determined by (1) organizational backgrounds, (2) entrepreneurial orientation or behavior and its link with (3) organizational performance based on the satisfaction of stakeholders' needs, as it is conceptualized by the social responsibility. © 2018 Allied Academies
Numerical Evaluation of Grouting Scenarios for Reducing Water Inflows from Major Faults in Underground Excavations
No full textWater inflows through fracture networks are a major economic and safety issue in underground mines. Although pre-grouting of pilot holes during mine development efficiently reduces water inflows into mine excavations, current design methods remain empirical. We used a finite-element numerical model to simulate groundwater inflow into a stope with the objective of finding the best configuration to increase pre-grouting efficiency for sealing faults while decreasing the associated costs. We designed simulations to test various grout injection scenarios for two different major fault locations around the stope, based on the site characteristics of the Éléonore mine (Québec, Canada). Sensitivity analyses show that, for a fault located above the stope, grouting the zone between the fault and the stope reduces inflow more than directly grouting the fault. Also, in the case of a fault intersecting a stope, the simulations suggest that the fault itself should be grouted as widely as possible, instead of sealing only the immediate surroundings of the stope. © 2019, Springer-Verlag GmbH Germany, part of Springer Nature
On the geometry of the attractive ellipsoids method: Applications to the robust control design of switched systems
No full textThis contribution deals with a robust control design for general switched affine control systems. Dynamical models under consideration are described by ordinary differential equations involving a switching mechanism and in the presence of bounded uncertainties. The design procedure we analyse is based on the newly elaborated attractive ellipsoids method ([32]). The stability and robustness of the resulting closed-loop systeminvolves an abstract Clarke stability theoremand a theoretic extension of the celebrated Lyapunov-typemethodology. A short discussion on the obtained analytic results and possible applications and extensions is also included. © 2017 by Nova Science Publishers, Inc. All Rights Reserved
Actitudes de docentes universitarios frente al uso de dispositivos móviles con fines académicos
No full textThe objective of this article is to examine university professors' attitudes toward the use of mobile devices for academic purposes (mobile learning) in an institution of higher education for technological vocational training in Colombia. Since the methodological focus was qualitative, information was collected from fifteen semi-structured in-depth interviews. Based on theory, three analytical categories were identified: knowledge, attitudes and skills, and challenges and opportunities in implementing strategies of mobile learning. The main contributions the participants identified in mobile learning are improved mobility, accessibility, and interactivity in educational processes; they named challenges in the lack of academic promotion, teacher training, limited autonomy in student learning, and difficulties in accessing adequate mobile devices for students. © 2018 Consejo Mexicano de Investigacion Educativa. All rights reserved
The fractional Fourier transform as a biomedical signal and image processing tool: A review
No full textThis work presents a literature review of the fractional Fourier transform (FrFT) investigations and applications in the biomedical field. The FrFT is a time-frequency analysis tool that has been used for signal and image processing due to its capability in capturing the non-stationary characteristics of real signals. Most biomedical signals are an example of such non-stationarity. Thus, the FrFT-based solutions can be formulated, aiming to enhance the health technology. As the literature review indicates, common applications of the FrFT involves signal detection, filtering and features extraction. Establishing adequate solutions for these tasks requires a proper fractional order estimation and implementing the suitable numeric approach for the discrete FrFT calculation. Since most of the reports barely describe the methodology on this regard, it is important that future works include detailed information about the implementation criteria of the FrFT. Although the applications in biomedical sciences are not yet among the most frequent FrFT fields of action, the growing interest of the scientific community in the FrFT, supports its practical usefulness for developing new biomedical tools. © 2020 Nalecz Institute of Biocybernetics and Biomedical Engineering of the Polish Academy of Science
Legislative and jurisprudential management of transnational organized crime in Latin America [Tratamiento legislativo y jurisprudencial del crimen organizado transnacional en América Latina]
No full textThe research analyzes the legislation and jurisprudence on Transnational Organized Crime (TOC) in Latin America from two databases of the knowledge management portal Sharing Electronic Resources and Laws on Crime (SHERLOC) of the Office for Drugs and Crime (UNODC). The objective is to establish the treatment that 20 countries of Latin America give to 14 crimes through the adaptation of their norms and judicial decisions for the implementation of the Palermo Convention of the year 2000. The mixed methodology (quantitative-qualitative) allowed an approach from the descriptive and comparative statistics to the time that a hermeneutic analysis is carried out. © 2020, Institute of Latin American Studies, Russian Academy of Sciences
Cyberbullying and gender: New benchmarks in the occupation of virtual spaces [Ciberbullying y género: Nuevos referentes en la ocupación de los espacios virtuales]
No full textResearch on the topic of cyberbullying often ignores the gender aspects involved as it is approached as a problem of peer bullying. However, cyberbullying reproduces the same gender stereotypes which are present in physical spaces: it often involves the threat of spreading content aimed at undermining young women´s reputation and jeopardizes their present and future personal and professional relationships. In the face of these aggressions, the message that is transmitted to adolescent girls in the media is not one of empowerment but of fear. The burden of protecting oneself and adopting precautions is subverted in them, just like in physical spaces. It is essential to socialize adolescents without fear of discrediting, marginalization, humiliation and, in short, gender violence. © 2018 Universidad Complutense de Madrid. All Rights Reserved