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1
artículo
Publicado 2022
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Climate change, as well as the appearance of pests and diseases, are affecting olive plantations (Olea europaea L.) and the production of olives in the world, therefore, there is an urgent need for tools to help us identify the spatial and temporal evolution of the olive groves, regarding the attack of pests, in this case, the Orthezia olivicola and the olive borer Phloeotribus scarabaeoides. In this work, we use information from freely available satellite images that allowed us to carry out spatial and temporal analysis and the combination of vegetation indices. For the studied area, according to the values of the NDVI (Normalized Difference Vegetation Index), it was identified that the surface of diseased plants ranges from 42% to 68%, moderately healthy plants from 2% to 18%, and the state of the plantation considered as very healthy plants with a tendency to zero, which means that pr...
2
objeto de conferencia
Sabancaya Volcano (5960 m) is a stratovolcano located approximately 80 km southeast of the city of Arequipa in southern Peru. In the Holocene, activity at Sabancaya has included several Plinian eruptions which were followed by effusion of massive andesitic and dacitic lava flows that now cover large portions of the west, north and east flanks of the edifice. The Volcanological Observatory of INGEMMET (OVI) uses geophysical and geochemical monitoring techniques to track changes in activity at Sabancaya. The first precursors of the current eruptive crisis were detected in 2014, when a slight but visible increase in fumarolic emissions was observed. Around the same time, sulfur dioxide (SO2) emissions were detected for the first time. In 2015, volcano-tectonic and hybridfrequency earthquakes set in, and their frequency of occurrence increased throughout 2015 and into early 2016. Clearly, ma...
3
tesis de maestría
Publicado 2019
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This thesis will be oriented in the study of open quantum systems. The transition of processes that go between the Markovian and non-Markovian regime will be studied. The diagnose of non-Markovianity will be made in terms of the variation of the coherence of the state. Accordingly, an optical setup will be implemented that allows us to manipulate certain degrees of freedom, like the polarization and the optical path. Theoretically, we have found that the coherence of the system is transferred to the environment and it decreases as we move a parameter that we will take as time. This situation has been confirmed in the experiment. Then, due to the second part of the setup, which produces a non-Markovian evolution by also changing one of its parameters, we have accomplished the goal of returning the information back into the system and to measure the non-Markovianity of the process.
4
tesis de maestría
Publicado 2019
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This thesis will be oriented in the study of open quantum systems. The transition of processes that go between the Markovian and non-Markovian regime will be studied. The diagnose of non-Markovianity will be made in terms of the variation of the coherence of the state. Accordingly, an optical setup will be implemented that allows us to manipulate certain degrees of freedom, like the polarization and the optical path. Theoretically, we have found that the coherence of the system is transferred to the environment and it decreases as we move a parameter that we will take as time. This situation has been confirmed in the experiment. Then, due to the second part of the setup, which produces a non-Markovian evolution by also changing one of its parameters, we have accomplished the goal of returning the information back into the system and to measure the non-Markovianity of the process.
5
tesis de maestría
Publicado 2019
Enlace
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This thesis will be oriented in the study of open quantum systems. The transition of processes that go between the Markovian and non-Markovian regime will be studied. The diagnose of non-Markovianity will be made in terms of the variation of the coherence of the state. Accordingly, an optical setup will be implemented that allows us to manipulate certain degrees of freedom, like the polarization and the optical path. Theoretically, we have found that the coherence of the system is transferred to the environment and it decreases as we move a parameter that we will take as time. This situation has been confirmed in the experiment. Then, due to the second part of the setup, which produces a non-Markovian evolution by also changing one of its parameters, we have accomplished the goal of returning the information back into the system and to measure the non-Markovianity of the process.
6
artículo
For decades, synthetic chemists have sought to make industrial-scale catalysts as efficient and exceptionally selective as enzymes are in biological systems but, unfortunately, this task has proven evasive. Efforts then focused on making enzymes useful for the industry, and protein engineering had the task of adapting natural enzymes to work in conditions of industrial-scale processes. The approach called directed evolution is one of the models used to carry this out. Inspired by the natural evolution of species, this model proposes to evolve enzymes in an accelerated way, within the laboratory, in such a way that the manipulated enzyme exhibits the properties desired for its industrial application. Directed evolution is responsible, for example, for the industrial-scale production of enzymes included in household detergents and of the enzymes used by the pharmaceutical industry for the ...
7
artículo
Publicado 2024
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Located in the south of the Iberian Peninsula, the Doñana salt marshes occupy around half of Doñana National Park and are currently considered among the most important wetlands worldwide due to the importance of their ecosystem. In this research work, using a novel patented procedure, the effects of climate change on the study area between 2009 and 2020 were evaluated. For this reason, DEMs were downloaded from the 30-meter Shuttle Radar Topography Mission (SRTM). Furthermore, to check the depth of the flooded area, 792 satellite images (L5 TM, L7 ETM+, and L8 OLI) with a resolution of 30 m were analyzed. The results show how the combined use of geomatic techniques, such as radar, optical, and geographic information system (GIS) data, along with regression models and iterative processes, plays a key role in the prediction and analysis of the flooded area volume in the Doñana salt mars...
8
objeto de conferencia
Publicado 2016
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The first and third author acknowledge the Peruvian agencies FONDECYT and CONCYTEC for the support. The second author acknowledges the Brazilian agencies CAPES and FAPESP for the support
9
artículo
Remote sensing is the technology that has enabled us to obtain information about the Earth's surface without directly contacting it. For this reason, currently, the Bolivian state has considered a list of interesting applications of remote sensing in the country, including the following: biodiversity and environment monitoring, mining and geology, epidemiology, agriculture, water resources and land use planning. The use of satellite images has become a great tool for epidemiology because with this technological advance we can determine the environment in which transmission occurs, the distribution of the disease and its evolution over time. In that context, one of the important diseases related to public health in Bolivia is Chagas disease, also known as South American Trypanosomiasis. Chagas is caused by a blood-sucking bug or Vinchuca, which causes serious intestinal and heart long ter...
10
artículo
Publicado 2012
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This commentary focuses on the importance that DNA sequence analysis has in biodiversity studies and the need for improving administrative procedures regarding biodiversity research in Peru. Given the rapid loss of biodiversity and natural resources in many areas of Peru, research aimed at identifying, characterizing, and describing biodiversity is a priority for developing appropriate conservation and mitigation strategies. For cur-rent and future research on Peruvian biodiversity and conservation, we emphasize the importance of using an integrative taxonomy approach, including the study of evolutionary processes associated with areas of high biodiversity and endemism. Additionally, it is essential that governmental institutions responsible for review-ing permit applications and research plans, focusing on biodiversity research in Peru, recognize and support studies that incorporate an ...
11
artículo
The cultural evolution of tobacco in the stories «Tabaco para el rey» and «La cajetilla de cigarros»
Publicado 2022
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This article will describe how tobacco culture has changed over time and what are its various applications, whether cultural, medicinal, or harmful, in Peruvian history. To explain this process, the starting point will be the ancient civilizations of some pre-Inca cultures. Similarly, its importance during the colonial and republican periods will be demonstrated, based on the traditions «Tabaco para el rey» and «La cajetilla de cigarros», by Ricardo Palma. Finally, the current situation of smoking will be detailed and a reflection on its harmful prevalence for health will be offered.
12
artículo
Publicado 2024
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Coastal wetlands adjacent to urban areas, such as the Pantanos de Villa in the city of Lima, Peru, are subject to constant changes in land use due to anthropogenic interaction. This has led to the reduction of dense vegetation areas, giving way to built-up areas. Therefore, this article addresses the issue of the physical changes experienced in urban areas adjacent to the wetland, such as the environmental management units, in this case the Zone of Protection of Outcrop and Surface Runoff (ZPAES), and the Zone of Landscape Protection of Edge (ZPB), as well as the Pantanos de Villa Wildlife Refuge (RVSPV), as a result of rapid urban expansion. Therefore, the objective of this research is to analyze the spatial and temporal evolution of the Pantanos de Villa environment and urbanization within the Environmental Management Units ZPB, ZPAES, and RVSPV. To achieve this, the Google Earth Engin...
13
artículo
Publicado 2016
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The research explains why factors such as the level of family assets, infrastructure, education and distance to the capital district determine financial inclusion in the districts of Peru. Based on this objective, a descriptive analysis was performed on the relationship between the variables and the approximation on the inferential analysis: estimation using Ordinary Least Squares of a cross section with data up to December 2015.The results show a positive relationship between the factors, with the exception of distance, which could be explained by a concentration in the provision of financial services. Whereas, a large portion of the financial inclusion at the district level would be explained by other components.By identifying these other components, a broader multidimensional definition of financial inclusion was outlined, approaching the issue from a dynamic and evolutionary perspect...
14
artículo
Publicado 2016
Enlace
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The research explains why factors such as the level of family assets, infrastructure, education and distance to the capital district determine financial inclusion in the districts of Peru. Based on this objective, a descriptive analysis was performed on the relationship between the variables and the approximation on the inferential analysis: estimation using Ordinary Least Squares of a cross section with data up to December 2015.The results show a positive relationship between the factors, with the exception of distance, which could be explained by a concentration in the provision of financial services. Whereas, a large portion of the financial inclusion at the district level would be explained by other components.By identifying these other components, a broader multidimensional definition of financial inclusion was outlined, approaching the issue from a dynamic and evolutionary perspect...
15
artículo
Publicado 2008
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Directed evolution allows us to explore protein functionalities not required in the natural environment. It mimics natural genetic processes and selective pressures. This approach is used when the molecular basis is not completely understood and rational design is a difficult task. This approach consists of serial cycles of consecutive diversification and selection which eventually lead to the accumulation of beneficial mutations. Here are presented two cases where directed evolution is used to modify two different proteins: Taq polymerase, enzyme used for DNA extension in PCR, and the LacI repressor protein which regulates gene expression on E.coli.
16
artículo
Publicado 2008
Enlace
Enlace
Directed evolution allows us to explore protein functionalities not required in the natural environment. It mimics natural genetic processes and selective pressures. This approach is used when the molecular basis is not completely understood and rational design is a difficult task. This approach consists of serial cycles of consecutive diversification and selection which eventually lead to the accumulation of beneficial mutations. Here are presented two cases where directed evolution is used to modify two different proteins: Taq polymerase, enzyme used for DNA extension in PCR, and the LacI repressor protein which regulates gene expression on E.coli.
17
artículo
Publicado 2023
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This paper takes a historical overview in order to elucidate the precedents and evolution of one of the most revolutionary and useful organizational instruments in society. From the perspective of many entrepreneurs, the modern corporation is the one that offers the best conditions for the development of business activity.Therefore, the author highlights the importance of analyzing that this institution is built from a long process of development of liability protection mechanisms that, in accordance with the needs of the mankind and with the help of codification, led to what we know today.
18
tesis de grado
Muchas organizaciones orientadas al desarrollo tecnológico e innovación están en constante actualización de sus sistemas y procesos de atención, con la constante necesidad de agilizar e innovar sus procesos. En consecuencia, las necesidades por cubrir en este sector son cada vez mayores, razón por la cual, las empresas apuntan a ser eficientes en el uso de sus recursos y así solo enfocarse en el giro principal de su negocio. El objetivo del presente trabajo es conocer los diversos motivos por los cuales se presentan reprocesos y demoras en la atención tanto en las áreas como operaciones, comercial, así como otras áreas de soporte. Por ello, se evalúa desde el momento en que se presentan las incidencias derivadas de una observación o reclamo por parte de un cliente o cuando se identifica una posible omisión en los procesos internos de la compañía Evolutions Solutions. Lueg...
19
tesis de maestría
A combined experimental/analytical approach for an efficient evaluation of stiffness and characteristic curves of fiber reinforced plastic volute springs is presented in this work. Before performing the analysis mentioned in previous lines, in the early chapters, it can find the most common types of fibers, resins (matrices) and manufacturing processes used to produce composite laminates been briefly described. It also describes the analytical approaches that currently exist to determine the elastic constants of composites such as the longitudinal and transversal modulus, Poisson’s ratios and shear moduli; it also describes the improved and semi-empirical formulas to calculate the effective shear moduli and the transversal modulus. At the end of the chapter, some manufacturing methods of fiber reinforced plastic springs are described. Since fiber reinforced plastic volute springs are n...
20
tesis de maestría
A combined experimental/analytical approach for an efficient evaluation of stiffness and characteristic curves of fiber reinforced plastic volute springs is presented in this work. Before performing the analysis mentioned in previous lines, in the early chapters, it can find the most common types of fibers, resins (matrices) and manufacturing processes used to produce composite laminates been briefly described. It also describes the analytical approaches that currently exist to determine the elastic constants of composites such as the longitudinal and transversal modulus, Poisson’s ratios and shear moduli; it also describes the improved and semi-empirical formulas to calculate the effective shear moduli and the transversal modulus. At the end of the chapter, some manufacturing methods of fiber reinforced plastic springs are described. Since fiber reinforced plastic volute springs are n...
