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Tegucigalpa, Honduras

The National Autonomous University of Honduras is the national public university of Honduras. It was founded in 1847 and has many campuses throughout the country. Wikipedia.

Garcia-Urquia E.,Uppsala University | Garcia-Urquia E.,National Autonomous University of Honduras | Axelsson K.,Uppsala University
Natural Hazards

The capital city of Honduras, Tegucigalpa, suffers from the occurrence of destructive landslides on a yearly basis. During the rainy season, damages to infrastructure as well as injuries, casualties and homeless individuals resulting from landslides are reported in the press. This paper presents the development of a database for rainfall-induced landslides for the period 1980-2005, based on the news reported by two local newspapers. The editions comprehended during the study period have been scrutinized, and articles focusing on landslides, tropical storms, hurricanes, floods and vulnerability of the city have been collected. The interpretation of these archives has allowed the compilation of valuable data of approximately 400 landslides. The analyses of monthly and annual precipitation during the study period show how extreme rainfall events like Hurricane Mitch in October of 1998 have significantly contributed to the initiation of landslides. In addition, the assessment of the slums and neighborhoods affected by landslides during the study period reveals an evident link between the social and physical vulnerability of Tegucigalpa. In order to estimate the reliability of this press-based database, the set of landslides that have been reported as a result of Hurricane Mitch in the press archives has been compared with two inventories based on the interpretation of aerial photographs taken in 1999 and 2001. It is shown that the analysis of the landslide damage left after the hurricane can be enriched with the detailed temporal data provided in the archives and the precise location of these events determined by the aerial photographs. Despite the difficulties faced in the compilation of this database, a good comprehension of the temporal and spatial distribution of landslides in Tegucigalpa has been achieved. © 2014 Springer Science+Business Media Dordrecht. Source

Galindo F.,National Autonomous University of Honduras
Proceedings of the 2015 IEEE 35th Central American and Panama Convention, CONCAPAN 2015

Currently, the electrical industry has focused its efforts on matters of electrical safety. Industrial safety statistics show that the second cause of death and injuries after electrocution is the arc flash phenomenon. Arc flash is a phenomenon that can be voluntarily or involuntarily triggered, which results in a sudden release of energy, due to a sudden expansion of the air in the facility. During the energy release, temperatures of up to 35000 °F can be reached. This potential risk, regarding industrial electrical safety, is addressed and delimited by entities such as OSHA, NFPA and IEEE. The deep study of (electrical) arc flash is a special topic in the electrical engineering field, which requires a complete analysis of grounding systems, short circuit and protection coordination studies, among others. The article is not intended to be a deep analysis guide, the purpose is to generate a map, which allows you to view the necessary steps to conduct a study to distinguish the practical differences between the application of the rules, list techniques/procedures to mitigate arc energy electric and briefly explain the concept of energy reduction depending on the duration of the failure. © 2015 IEEE. Source

Meza-Fajardo K.C.,National Autonomous University of Honduras | Papageorgiou A.S.,University of Patras
Soil Dynamics and Earthquake Engineering

By exploiting the capability of identifying and extracting surface waves existing in a seismic signal, we can proceed to estimate the angular displacement (rotation about the horizontal axis normal to the direction of propagation of the wave; rocking) associated with Rayleigh waves as well as the angular displacement (rotation about the vertical axis; torsion) associated with Love waves.For a harmonic Rayleigh (Love) wave, rocking (torsion) would be proportional to the harmonic vertical (transverse horizontal) velocity component and inversely proportional to the phase velocity corresponding to the particular frequency of the harmonic wave (a fact that was originally exploited by Newmark (1969) [15] to estimate torsional excitation). Evidently, a reliable estimate of the phase velocity (as a function of frequency) is necessary. As pointed out by Stockwell (2007) [17], because of its absolutely referenced phase information, the S-Transform can be employed in a cross-spectrum analysis in a local manner. Following this suggestion a very reliable estimate of the phase velocity may be obtained from the recordings at two nearby stations, after the dispersed waves have been identified and extracted. Synthesis of the abovementioned harmonic components can provide a reliable estimate of the rocking (torsional) motion induced by an (extracted) Rayleigh (Love) wave.We apply the proposed angular displacement estimation procedure for two well recorded data sets: (1) the strong motion data generated by an aftershock of the 1999 Chi-Chi, Taiwan earthquake and recorded over the Western Coastal Plain (WCP) of Taiwan, and (2) the strong motion data generated by the 2010 Darfield, New Zealand earthquake and recorded over the Canterbury basin. The former data set is dominated by basin-induced Rayleigh waves while the latter contains primarily Love waves. © 2015 Elsevier Ltd. Source

Garrido-Vega P.,University of Seville | Ortega Jimenez C.H.,National Autonomous University of Honduras | De Los Rios J.L.D.P.,University of Seville | Morita M.,Gakushuin University
International Journal of Production Economics

Many industries face open, global markets with requirements for rapid response and low costs. Given the major role that technology plays in business competitiveness, proper technology management (T) in combination with a good production strategy (S), is important to address current challenges. This paper analyzes the nature of T & S implementation in different industrial contexts to examine whether there are differences in how T & S are implemented in different sectors, whether implementation is linked to performance, and whether contextual factors explain the differences. A database from the High Performance Manufacturing Project is used to test the research questions based on a survey of 267 plants across nine countries in three different industrial contexts (machinery, electronics and auto suppliers). The findings show some differences between the T and S practice modes in the three industries. T and S implementation is observed to be related to performance, but not in the same way. Three of the eight contextual factors are found to differ in the three sectors, which may explain the differences found in T and S implementation. The results imply that plants should consider the joint implementation of T and S as their interdependencies may affect performance, outweighing the possible differences between industries in which plants operate. However, when implementing a specific technology practice, not all plants necessarily consider the same production strategy practices across industries. Likewise, when adopting a certain production strategy, it is not necessarily influenced by the same technology practices across industries. © 2014 Elsevier B.V. All rights reserved. Source

Meza-Fajardo K.C.,National Autonomous University of Honduras | Papageorgiou A.S.,University of Patras
Soil Dynamics and Earthquake Engineering

The multi-axial perfectly matched layer (M-PML) is a material boundary condition for wave propagation problems in unbounded domains. It is obtained by extending the formulation of the split-field perfectly matched layer to a more general absorptive medium, for which damping profiles are specified along all dimensions of the problem. Under the hypothesis of small damping, it has been demonstrated that the stability of the system of partial differential equations of the M-PML can be related to the ratio of the damping profiles, and stable M-PML terminations for isotropic and orthotropic elastic media have been constructed. In the present work, we use the Routh-Horwitz determinants to demonstrate that the conclusions regarding the stability of M-PML for isotropic media for small damping are in fact valid for the more general case of damping coefficients of any (positive) value. The effectiveness of the M-PML is demonstrated by constructing stable terminations for the abovementioned media. The stability analysis is presented for 2-D in-plane (P-SV) wave propagation in elastic isotropic continua. © 2009 Elsevier Ltd. All rights reserved. Source

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