| 1. |
- Flores, Johnny, et al.
(författare)
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Analyzing IT service delivery in an ISP from Nicaragua
- 2010
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Ingår i: Organizational, Business, and Technological Aspects of the Knowledge Society. - Berlin, Heidelberg : Springer Berlin/Heidelberg. - 3642163238 - 9783642163234 ; , s. 155-165
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Konferensbidrag (refereegranskat)abstract
- This paper presents a method for analyzing IT service delivery and its application in an Internet Service Provider (ISP). The method proposed is based on ITIL-processes and case study technique; it includes questionnaires for gathering information, semi-structured interviews, focus groups and documents as sources of information for recognition of factual information. The method application allows to the ISP determines its practices and limitations of the IT Service Delivery.
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| 6. |
- Bergkvist, Lisa, et al.
(författare)
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Carbon Sequestration Potential f Agroforestry Systems For Phytoremediation In Chinandega, Nicaragua
- 2018
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Ingår i: Linnaeus Eco-Tech 2018. ; , s. 211-211
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- Greenhouse gases in the atmosphere have increased to earlier unrecorded levels, causing global climate change that increases GMT and threaten ecosystems and livelihoods. IPCC report suggest that agroforestry offers considerable carbon sequestration (c seq.) potential, especially for developing countries. The purpose of this study is to estimate the c seq. potential in different agroforestry systems suitable in Chinandega, Nicaragua - a deforested region where the ground is polluted by toxaphene and other POP:s. Three scenarios where studied; Shading system using Tectona grandis and Pogostemon cablin; Alley cropping using Erythrina poeppigiana and Ricinus communis and Silvopasture using Cordia alliodora and Brachiaria ruziziensis, the last scenario being divided into two subscenarios; unmanaged (grazed) and managed (harvested) grass. Calculations were performed using the modelling program CO2FIX v. 3.2, with a runtime of 100 years and assuming deforested area with no previous land use. Results show a significantly higher c seq. potential in Shading system (168/217 MgC/ha). Alley cropping yields 71 MgC/ha and Silvopasture results in 80/84 MgC/ha unmanaged and 65/70 MgC/ha managed. The higher number includes products from harvest. All scenarios show fluctuations over time due to thinning and harvesting practices. Phytoremediation potential of POPs has been shown in Ricinus communis and grass species. Soil c seq. is especially important to consider in longterm scenarios as this c seq. can be sustained over longer time. The inclusion of crop residue, the effect of grazing animals or changes in density of trees and crops and environmental fate of the toxic compounds need further assessment before considering large scale applications. Agroforestry practices could contribute to several benefits, including climate change mitigation and phytoremediation.
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| 8. |
- Garca, I., et al.
(författare)
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Removal of natural organic matter by conventional and enhanced coagulation in Nicaragua
- 2007
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Ingår i: Water Resources Management IV. - : WIT Press. - 9781845640743 ; , s. 399-409
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Konferensbidrag (refereegranskat)abstract
- Enhanced coagulation was applied to raw water from a drinking water plant in Nicaragua through bench scale jar test in order to reduce the presence of natural organic matter (NOM) and decrease the trihalomethanes (THMs) formation which has been linked to carcinogenic diseases. Due to the lack of information about the presence of chlorination by-products (CBPs) like trihalomethanes, a study of their formation by varying pH, contact time, temperature and chlorine dose was also performed; following conventional or enhanced coagulation treatment. The results show that enhanced coagulation decreases considerably the formation of THMs because it reduces strongly the presence of organic matter due to the fact that higher alum doses were used in comparison with conventional coagulation utilized at the facility. The removal of dissolved organic carbon (DOC) was improved from 44 at the facility to 67 with enhanced coagulation. Trihalomethanes concentration increases drastically when extreme conditions of the four parameters evaluated were applied exceeding the maximum contaminant levels of USEPA (80 g/L) but not the Nicaraguan target value (460 g/L) for both coagulation types.
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| 10. |
- Picado, Apolinar, et al.
(författare)
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Análisis Bibliométrico de las Publicaciones Científicas de Nicaragua en el Science Citation Index Expanded : Trienio 2007-2009
- 2010
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Ingår i: COMCAPLA 2010. - Mexico City, Mexico : National Polytechnic Institute (IPN). ; , s. AMD-101
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Konferensbidrag (refereegranskat)abstract
- En el presente estudio se analizó la producción científica de Nicaragua en el Science Citation Index Expanded durante el período 2007-2009. Se recopiló un total de 216 publicaciones distribuidas en 150 revistas. Su análisis global mostró una actividad creciente que alcanzó alrededor del 47 %. La distribución de campos temáticos mostró un aporte mayoritario en la medicina (30 %), seguido por las ciencias agrícolas y biológicas (16 %) y la ciencia ambiental (12 %). La UNAN-León constituyó la institución Nicaragüense más productiva, con un aporte del 25 % al total de publicaciones. El 95 % de las publicaciones se realizaron en colaboración con investigadores provenientes de 62 países.
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