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algoritmo de colonia de hormigas 4 algoritmo de la hormiga 4 ant algorithm 4 ant colony algorithm 4 protocolos de enrutamiento 4 routing protocols 4 routing simulation 4 más ...
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1
artículo
Obstetric hemorrhage is the most common cause of maternal mortality in the world. Our knowledge of hemorrhagic shock pathophysiology and management has significantly improved during the last decades. Blood transfusion has emerged as a strategy with great impact on patients’ survival. Consequently, it is crucial to have a protocol of massive blood transfusion available for cases of massive obstetric hemorrhage.
2
artículo
Cape “gooseberry” Physalis peruviana L. is a Solanaceae of great economic importance due to the high nutritional value of its fruits. It is known that the use of a good NPK fertilization scheme allows to achieve increases in the content of nutrients such as proteins. The objective of this work was to determine the effect of different doses 160-50-160; 225-70-275; 300-100-450 of NPK respectively on the content of total soluble proteins in cape goosberry leaves. Total soluble protein content was determined with the Bradford method. Cape goosberry plants treated with NPK 300-100-450 showed higher PST content (31.04 ug/g sample), with significant differences (p<0.05) compared to the control. The NPK 225-70-275 treatment showed a value of 23.08 ug/g total soluble protein sample, while the lowest protein value was obtained with the NPK 160-50-160 treatment (9.81 ug/g sample). It is conc...
3
artículo
La producción de biomasa microbiana en el mundo ha experimentado muchos cambios durante las últimas dos décadas y se han desarrollado varios procesos para la producción de biomasa a cargo de microorganismos útiles como fuentes de proteína para alimentación. En la presente investigación se usaron residuos lignocelulósicos agroindustriales tales como “Brácteas” de Cynara scolymus var. lorca, “peladilla” de Asparagus officinalis y “coronta” de Zea maiz procedentes de la Provincia de Viru, Trujillo y Ascope respectivamente; tuvo como objetivo Evaluar la influencia de la asociación mixta de Trichoderma reesei y Chaetomium cellulolyticum en la producción de biomasa de Candida utilis var major. Para ello se construyeron 10 biorreactores de vidrio tipo tanque agitado y aireado, que fueron alimentados con 100gramos de cada residuo lignocelulósico agroindustrial con 600 ml...
4
artículo
            The aim of this study was to evaluate the effect of the administration of ibuprofen in the establishment of the gestation of bovine embryos produced in vitro. In total, 85 Bos taurus x B. indicus heifers were used as embryo recipients, which were subjected to a protocol of synchronization of oestrus and ovulation with the insertion of an intravaginal progesterone implant (Sincrogest®) for eight days, plus the application of 2 mg of oestradiol benzoate (Sincrodiol®). To the removal of the implant, 500 μg sodium cloprostenol (Sincrocio®), 300 IU of equine chorionic gonadotropin (Sincro eCG®), plus the administration of 1 mg of oestradiol cypionate (SincroCP®,) were applied. One hour before embryo transfer, 5 mg/kg of ibuprofen IM was applied. No significant difference was observed in the gestation rate of the control ...
5
artículo
            The aim of this study was to evaluate the effect of the administration of ibuprofen in the establishment of the gestation of bovine embryos produced in vitro. In total, 85 Bos taurus x B. indicus heifers were used as embryo recipients, which were subjected to a protocol of synchronization of oestrus and ovulation with the insertion of an intravaginal progesterone implant (Sincrogest®) for eight days, plus the application of 2 mg of oestradiol benzoate (Sincrodiol®). To the removal of the implant, 500 μg sodium cloprostenol (Sincrocio®), 300 IU of equine chorionic gonadotropin (Sincro eCG®), plus the administration of 1 mg of oestradiol cypionate (SincroCP®,) were applied. One hour before embryo transfer, 5 mg/kg of ibuprofen IM was applied. No significant difference was observed in the gestation rate of the control ...
6
artículo
The main objective on this research is the development of finding the optimal parameters for a routing algorithm for network routers based on the ant algorithm described as AntNet. The optimum parameters for this type of algorithm improve a more efficient alternative to those given by the RIP, EIGRP and OSPF routing protocols, to be applied in a data network. This shall be tested in two networks and routers defined, taking the same characteristics for the three groups: RIP, OSPF and by the result provided by the genetic algorithm implemented using a static network. The system recognizes the best path between networks of routers, based on the principle of AntNet networks or networks of ants, which are the best way from exploring almost all roads, using estimergia to go there and make optimal. MatLab was used to detect the best way. Later this road was implemented in a real network data, s...
7
artículo
The main objective on this research is the development of finding the optimal parameters for a routing algorithm for network routers based on the ant algorithm described as AntNet. The optimum parameters for this type of algorithm improve a more efficient alternative to those given by the RIP, EIGRP and OSPF routing protocols, to be applied in a data network. This shall be tested in two networks and routers defined, taking the same characteristics for the three groups: RIP, OSPF and by the result provided by the genetic algorithm implemented using a static network. The system recognizes the best path between networks of routers, based on the principle of AntNet networks or networks of ants, which are the best way from exploring almost all roads, using estimergia to go there and make optimal. MatLab was used to detect the best way. Later this road was implemented in a real network data, s...
8
artículo
The main objective on this research is the development of finding the optimal parameters for a routing algorithm for network routers based on the ant algorithm described as AntNet. The optimum parameters for this type of algorithm improve a more efficient alternative to those given by the RIP, EIGRP and OSPF routing protocols, to be applied in a data network. This shall be tested in two networks and routers defined, taking the same characteristics for the three groups: RIP, OSPF and by the result provided by the genetic algorithm implemented using a static network. The system recognizes the best path between networks of routers, based on the principle of AntNet networks or networks of ants, which are the best way from exploring almost all roads, using estimergia to go there and make optimal. MatLab was used to detect the best way. Later this road was implemented in a real network data, s...
9
artículo
The main objective on this research is the development of finding the optimal parameters for a routing algorithm for network routers based on the ant algorithm described as AntNet. The optimum parameters for this type of algorithm improve a more efficient alternative to those given by the RIP, EIGRP and OSPF routing protocols, to be applied in a data network. This shall be tested in two networks and routers defined, taking the same characteristics for the three groups: RIP, OSPF and by the result provided by the genetic algorithm implemented using a static network. The system recognizes the best path between networks of routers, based on the principle of AntNet networks or networks of ants, which are the best way from exploring almost all roads, using estimergia to go there and make optimal. MatLab was used to detect the best way. Later this road was implemented in a real network data, s...
10
tesis doctoral
Mycobacterium tuberculosis (Mtb) sigue siendo uno de los patógenos más mortales a nivel mundial, a pesar de ser una enfermedad prevenible. La tuberculosis (TB) se trata con una combinación de cuatro medicamentos antituberculosos de primera línea: rifampicina (RIF), isoniacida, pirazinamida y etambutol, para cepas sensibles a los medicamentos. Entre estos, la RIF es uno de los agentes más potentes para controlar la enfermedad. Sin embargo, la resistencia a la RIF conlleva la aparición de casos de TB resistente a la RIF (RR-TB) o multidrogo resistente (MDR-TB). El mecanismo principal de resistencia implica mutaciones en el gen rpoB, que es responsable de aproximadamente el 95% de los casos. No obstante, todavía se están identificando otros mecanismos moleculares y condiciones que podrían contribuir a la propagación de las poblaciones RR-TB y MDR-TB. Esta investigación doctoral s...
11
artículo
ObjetivosCaracterizar los niveles y mecanismos de resistencia a β-lactámicos, quinolonas y macrólidos en 62 aislamientos de Escherichia coli causantes de bacteriemia en niños peruanos.MétodosSe determinaron las concentraciones inhibitorias mínimas (CIM) de ciprofloxacino, ácido nalidíxico (NAL) y azitromicina en presencia y ausencia de Phe-Arg-β-naftilamida. También se estableció la susceptibilidad a otros 14 agentes antimicrobianos. Se identificaron las β-lactamasas de espectro extendido (ESBL) y se determinaron las mutaciones en gyrA y parC, así como la presencia de mecanismos transferibles de resistencia a quinolonas (TMQR) y macrólidos (TMMR).ResultadosCincuenta aislados (80,6%) eran multirresistentes. Se observaron altas proporciones de resistencia a la ampicilina (93,5%), al NAL (66,1%) y al trimetoprim/sulfametoxazol (66,1%). Ningún aislado mostró resistencia a los...
12
artículo
Breakthroughs in vitrification protocols and the results obtained after frozen embryo transfer have resulted in a different version of the assisted reproduction standard cycles: the “freeze-all” cycles. Regardless of their use beyond the usual indications (elevated progesterone, risk of hyperstimulation, among others), this new concept currently represents a common practice in many institutions and is applied to all patients. In this article, we will discuss the various factors that may have contributed to this change in policy and the scientific evidence for this topic. Based on this evidence, we will conclude if clinics should change their way of working from fresh embryo transfers to only transfer frozen embryos, or if we should maintain the standard protocol.
13
artículo
El presente trabajo de investigación tiene como objetivo diseñar y construir un biorreactor batch tipo tanque agitado y aireado con capacidad de un litro para la producción de proteína unicelular. Para su diseño y construcción se empleó un software que genera las especificaciones ideales para este tipo de trabajo, materiales y accesorios fácilmente manipulables y esterilizables a base de vidrio, tapones de caucho para uso químico y mangueras de plástico, el sistema de agitación se construyó con materiales de acero inoxidable más la adición de un motor de paso de 12 V. El biorreactor construido garantiza la esterilidad del sistema, una buena transferencia de oxígeno, calor y masa, al mismo tiempo que genera un mezclado uniforme tanto de la suspensión celular como del caldo fermentativo. Este tipo de biorreactor se diseñó con el propósito de generar las condiciones ideal...
14
Introducción: La transferencia precisa de pilares cortos en implantología es fundamental para replicar la posición tridimensional de los componentes protésicos en un modelo de trabajo, lo que permite asegurar un asentamiento pasivo de la futura prótesis implanto soportada y, con ello, su éxito a largo plazo. La ferulización de los transferentes se ha propuesto como una estrategia efectiva para mejorar la exactitud de esta transferencia, tanto en técnicas convencionales como digitales. Objetivo: comparar la exactitud de transferencia en pilares cortos utilizando impresiones convencionales con transferentes ferulizados e impresiones digitales con cuerpos de referencia ferulizados. Materiales y métodos: Se trata de un estudio experimental in vitro con una muestra de 10 modelos por técnica. Se analizarán variables como la altura de los pilares y la distancia interpilares, comparan...
15
tesis de grado
At the meeting in Rio de Janeiro, Brazil: Eco-92, signed the Framework Convention on Climate Change, signed by 162 heads of state, widely expected by fields of science, political and social (IUCC, UNEP, 1995; Framework Convention on Climate Change, 1998). But that legislation opening a space for discussion that the subject warranted in Agenda 21 (UNEP, 1996). The measures to implement, are the product of multidisciplinary research and periodic reports issued by the IPCC, Intergovernmental Panel on Climate Change (IPCC, 1995) the macro political wing is given by the Conference of the Parties (COP), a forum in regular meetings, propases and monitors implementation of technical tips, and sorne of its products: the mantle of Berlín 93 and the Kyoto Protocol 97 (CMNUCO, 19197; Parlamento Latinoamericano, et al, 1998). There are also several other discussion groups, funding and related action...
16
El traslado intrahospitalario del paciente crítico, es un procedimiento que conlleva muchos riesgos latentes para el paciente, por lo que conocer los riesgos a los que se enfrenta es fundamental para mejorar la seguridad. Objetivo: analizar las características del traslado seguro del paciente crítico dentro de la institución de salud. Metodología: se realizó una revisión bibliográfica en las bases de datos de: Scielo, Pubmed, Lilacs, La Referencia; y en la revista de científica Elsevier. Resultados: se seleccionaron 20 artículos científicos, comprendidos entre el año 2014 -2021,se encontró que los eventos adversos más comunes están relacionas con la alteración hemodinámica, respiratoria y neurológica del paciente; las instituciones no cuentan con protocolos específicos para el traslado intrahospitalario y los cuidados para un traslado seguro son aquellos concernientes ...
17
artículo
We present the record of the consumption and transfer of leaves of two species, Cynophalla flexuosa and Colicodendron scabridum (Capparaceae) by the bats Artibeus planirostris and Artibeus fraterculus, respectively. The finding was made in two localities of the province of Bagua and Utcubamba, department of Amazonas, between the months of January and March 2012, during an evaluation for bats for an Environmental Impact Estudy for 2D Sismic Prospecting and drilling of 02 wells in block 145, zone 1, ERM company. We installed 10 nets of mist in each sampling point, the nets were evaluated from 18:00 to 00:00 hours. Artibeus planirostris was captured in January, carrying in its mouth one leaf of Cynophalla flexuosa, and expelling pellets of this, while A. fraterculus was found in March, carrying one leaf of Colicodendron scabridum; both bats were pregnant females. We are presumed that these ...
18
artículo
We present the record of the consumption and transfer of leaves of two species, Cynophalla flexuosa and Colicodendron scabridum (Capparaceae) by the bats Artibeus planirostris and Artibeus fraterculus, respectively. The finding was made in two localities of the province of Bagua and Utcubamba, department of Amazonas, between the months of January and March 2012, during an evaluation for bats for an Environmental Impact Estudy for 2D Sismic Prospecting and drilling of 02 wells in block 145, zone 1, ERM company. We installed 10 nets of mist in each sampling point, the nets were evaluated from 18:00 to 00:00 hours. Artibeus planirostris was captured in January, carrying in its mouth one leaf of Cynophalla flexuosa, and expelling pellets of this, while A. fraterculus was found in March, carrying one leaf of Colicodendron scabridum; both bats were pregnant females. We are presumed that these ...
19
tesis de grado
At the meeting in Rio de Janeiro, Brazil: Eco-92, signed the Framework Convention on Climate Change, signed by 162 heads of state, widely expected by fields of science, political and social (IUCC, UNEP, 1995; Framework Convention on Climate Change, 1998). But that legislation opening a space for discussion that the subject warranted in Agenda 21 (UNEP, 1996). The measures to implement, are the product of multidisciplinary research and periodic reports issued by the IPCC, Intergovernmental Panel on Climate Change (IPCC, 1995) the macro political wing is given by the Conference of the Parties (COP), a forum in regular meetings, proposes and monitors implementation of technical tips, and some of its products: the mantle of Berlin 93 and the Kyoto Protocol 97 (CMNUCO, 1997; Parlamento Latinoamericano, et al, 1998). There are also several other discussion groups, funding and related actions: ...
20
tesis de grado
Las bandas transportadoras son indispensables en la minería, permitiendo el traslado eficiente de materiales pesados y contribuyendo a una producción fluida. Esta investigación se enfoca en mejorar la evaluación del empalme vulcanizado en caliente de estas bandas en una empresa minera, buscando reducir riesgos de fallas continuas en operación. El propósito del estudio es diseñar un protocolo específico para el empalme vulcanizado en caliente, con el fin de minimizar los riesgos de fallo continuo en una empresa minera en Ancash. A través de una metodología aplicada, se desarrolla un proceso que incluye la definición de materiales, análisis de fichas técnicas, normativas, manuales y el desarrollo del ensayo de tracción según la norma ISO 283. Como resultado, se diseñó un procedimiento de empalme vulcanizado en caliente de fajas transportadoras de minerales con núcleo text...