Robert Salazar Ruiz
Unmsm, Fisicoquímica, Undergraduate
El Consejo de Transferencia e Innovación del Vicerrectorado de Investigación de la Universidad Nacional Mayor de San Marcos (UNMSM-Lima,Peru), como parte de sus actividades de Vigilancia Tecnológica presenta el presente Boletín de... more
El Consejo de Transferencia e Innovación del Vicerrectorado de Investigación de la Universidad Nacional Mayor de San Marcos (UNMSM-Lima,Peru), como parte de sus actividades de Vigilancia Tecnológica presenta el presente Boletín de Vigilancia Tecnológica «Cobre (Cu) I+D+i» donde se presentan avances científicos y tecnológicos mundiales en los múltiples áreas tecnológicas que involucran al cobre, con el convencimiento que esta información motivará al lector a identificar oportunidades y desafíos de desarrollo tecnológico no sólo para nuestros investigadores sino para los interesados en general.
Research Interests: Old Copper Complex, Copper extraction and production, Copper, Copper Artefacts, Copper age, and 10 moreArqueozoología. Edad del Cobre, Epipaleolítico, Neolítico. Península Ibérica y Mediterráneo., Copper Alloys, Cobre, Aeraria lipsanoteca lipsanotheque aleación de cobre, copper alloy, epigrafía epigraphy caligrafía calography Islam al-Abdalous alñAndalus España Omeyas Ummayads, Copper based Alloys, Copper Nanoparticles, Flotación Del Cobre, Las Propiedades Del Cobre Sus Caracteriticas Y Sus Beneficios, Analisis De Cobre En El Peru, and Conservación pintura sobre cobre
Resumo: Damos a conocer el caso de un paciente de 36 años de edad quien presentaba Macroadenoma hipofisiario de 2, 1 x 2, 4 cms. El cual posterior a un evento hemorrágico, se manejó conservadoramente. Como una forma rara forma de resercar... more
Resumo: Damos a conocer el caso de un paciente de 36 años de edad quien presentaba Macroadenoma hipofisiario de 2, 1 x 2, 4 cms. El cual posterior a un evento hemorrágico, se manejó conservadoramente. Como una forma rara forma de resercar un adenoma ...
Resumo: Se analiza el caso de una paciente femenina de 35 años de edad, raza blanca, oficios del hogar quien consulta por presentar dolor en rodilla izquierda y dificultad para la marcha, diagnosticándose por métodos radiológicos y... more
Resumo: Se analiza el caso de una paciente femenina de 35 años de edad, raza blanca, oficios del hogar quien consulta por presentar dolor en rodilla izquierda y dificultad para la marcha, diagnosticándose por métodos radiológicos y biopsia tumor de células gigantes ...
Veering while walking is often reported in individuals with Parkinson's... more
Veering while walking is often reported in individuals with Parkinson's disease (PD), with potential mechanisms being vision-based (asymmetrical perception of the visual environment) or motoric (asymmetry in stride length between relatively affected and non-affected body side). We examined these competing hypotheses by assessing veering in 13 normal control participants (NC) and 20 non-demented individuals with PD: 9 with left-side onset of motor symptoms (LPD) and 11 with right-side onset (RPD). Participants walked in a corridor under three conditions: eyes-open, egocentric reference point (ECRP; walk toward a subjectively perceived center of a target at the end of the corridor), and vision-occluded. The visual hypothesis predicted that LPD participants would veer rightward, in line with their rightward visual-field bias, whereas those with RPD would veer leftward. The motor hypothesis predicted the opposite pattern of results, with veering toward the side with shorter stride length. Results supported the visual hypothesis. Under visual guidance, RPD participants significantly differed from NC, veering leftward despite a shorter right- than left-stride length, whereas LPD veered rightward (not significantly different from NC), despite shorter left- than right-stride length. LPD participants showed significantly reduced rightward veering and stride asymmetry when they walked in the presence of a visual landmark (ECRP) than in the eyes-open condition without a target. There were no group differences in veering in the vision-occluded condition. The findings suggest that interventions to correct walking abnormalities such as veering in PD should incorporate vision-based strategies rather than solely addressing motor asymmetries, and should be tailored to the distinctive navigational profiles of LPD and RPD.
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We explore the benefits of integrating roadmap-based path planning methods with agents performing group behaviors to achieve different objectives. We show how a wide range of group behaviors can be facilitated by using dynamic roadmaps.
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This report estimates inductively-coupled energy to a low-impedance load in a loop-to-loop arrangement. Both analytical models and full-wave numerical simulations are used and the resulting fields, coupled powers and energies are... more
This report estimates inductively-coupled energy to a low-impedance load in a loop-to-loop arrangement. Both analytical models and full-wave numerical simulations are used and the resulting fields, coupled powers and energies are compared. The energies are simply estimated from the coupled powers through approximations to the energy theorem. The transmitter loop is taken to be either a circular geometry or a
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Novel grafted azo-polymers were prepared from commercial low density polyethylene plates (PE). First, precursor polymers were synthesized by reacting PE in the presence of acryloyl chloride using gamma radiation. Further esterification of... more
Novel grafted azo-polymers were prepared from commercial low density polyethylene plates (PE). First, precursor polymers were synthesized by reacting PE in the presence of acryloyl chloride using gamma radiation. Further esterification of the resulting grafted polymers with four ...
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Cognitive performance can be impacted by many non-neurological factors, including preexisting expectations. The phenomenon of stereotype threat, or reduced cognitive performance due to preexisting beliefs, can apply to individuals... more
Cognitive performance can be impacted by many non-neurological factors, including preexisting expectations. The phenomenon of stereotype threat, or reduced cognitive performance due to preexisting beliefs, can apply to individuals following neurological injury (i.e., ‘‘diagnosis threat’’). We examined the effect of diagnosis threat on cognitive performance and symptom reporting following concussions while accounting for group identification (i.e., extent to which one’s identity is tied to being concussed). We also examined gender stereotype threat (i.e., women and math ability) to understand how these two related threat effects compare. Participants with a history of concussion were randomly assigned to one of three instructional sets emphasizing concussion history or gender, or neutral instructions. Individuals without a history of concussion served as a comparison group. Results revealed an effect of diagnosis threat on cognitive performance after group identification was taken into account, but only in male participants. In contrast, an underlying gender stereotype threat was observed in females across conditions, which was counteracted in the gender stereotype condition (i.e., stereotype reactance effect) due to the type of threat cues used. Also, controls exhibited greater symptom reporting than individuals with a concussion. Our findings highlight the importance of considering non-neurological factors impacting cognitive performance.
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Optical time domain reflectometry (OTDR) measurements have been performed to characterize the minimum reflection signature from PMMA plastic fiber splices. The dominant splice reflection sources due to inexact index matching and fiber... more
Optical time domain reflectometry (OTDR) measurements have been performed to characterize the minimum reflection signature from PMMA plastic fiber splices. The dominant splice reflection sources due to inexact index matching and fiber core misalignment were carefully ...