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transmission problem » transmission system (Expander búsqueda), translation problems (Expander búsqueda)
para transmission » para transmision (Expander búsqueda), data transmission (Expander búsqueda), oral transmission (Expander búsqueda)
transmission problem » transmission system (Expander búsqueda), translation problems (Expander búsqueda)
para transmission » para transmision (Expander búsqueda), data transmission (Expander búsqueda), oral transmission (Expander búsqueda)
1
artículo
In this paper we consider the nonlinear transmission problem for the wave equation with time dependent coefficients and linear internal damping. We prove global existence and exponential decay of solution. The result is achieved by considering energy like - Lyapunov functionals and suitable unique continuation theorem for the wave equation.
2
artículo
In this paper we consider the nonlinear transmission problem for the wave equation with time dependent coefficients and linear internal damping. We prove global existence and exponential decay of solution. The result is achieved by considering energy like - Lyapunov functionals and suitable unique continuation theorem for the wave equation.
3
artículo
Publicado 2008
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En este artículo consideramos el problema no lineal de transmisión para una ecuación de onda con coeficientes dependientes del tiempo y amortiguamiento interno no lineal. Se prueba la existencia global y se estudia propiedades de decaimiento de las soluciones. El resultado se alcanza usando técnicas de multiplicado res y el teorema continuación única conveniente para una ecuación de onda.
4
artículo
Publicado 2008
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En este artículo consideramos el problema no lineal de transmisión para una ecuación de onda con coeficientes dependientes del tiempo y amortiguamiento interno no lineal. Se prueba la existencia global y se estudia propiedades de decaimiento de las soluciones. El resultado se alcanza usando técnicas de multiplicado res y el teorema continuación única conveniente para una ecuación de onda.
5
artículo
This paper presents an optimal control strategy for the Zika virus disease with sexual transmission. A mathematical model for the transmission of the Zika virus is considered with three preventive measures as control, namely: the prevention of the sexual contagion with the use of condoms and the orientation in the transmission of Zika in the homosexual and heterosexual relations, the campaigns against vectors and the protection of the society regarding the contagion by mosquito bites. We examine the implementation of various combinations of the control strategies in order to determine the most cost-effective one. The necessary conditions for the optimal controls are determined using Pontryaguin’s maximum principle and the optimality problem is solved using Runge-Kutta fourth order scheme. Based on the computational results, we conclude that the most efficient control strategy is when i...
6
artículo
This paper presents an optimal control strategy for the Zika virus disease with sexual transmission. A mathematical model for the transmission of the Zika virus is considered with three preventive measures as control, namely: the prevention of the sexual contagion with the use of condoms and the orientation in the transmission of Zika in the homosexual and heterosexual relations, the campaigns against vectors and the protection of the society regarding the contagion by mosquito bites. We examine the implementation of various combinations of the control strategies in order to determine the most cost-effective one. The necessary conditions for the optimal controls are determined using Pontryaguin’s maximum principle and the optimality problem is solved using Runge-Kutta fourth order scheme. Based on the computational results, we conclude that the most efficient control strategy is when i...
7
artículo
Publicado 2021
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Pregnancy in a woman living with HIV continues to be an important health problem that involves not only the pregnant woman but also the product of pregnancy due to the high risk of transmitting the virus during pregnancy, the time of delivery and breastfeeding maternal. Despite the years the selected studies continue to report that the reduction of vertical transmission of HIV is achieved with the early diagnosis of the infection in the pregnant woman, reducing the maternal viral load using antiretroviral therapy in pregnancy and in timing of delivery, elective cesarean delivery, discontinuation of breastfeeding, and antiretroviral prophylaxis in the newborn.
8
artículo
Publicado 2021
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Pregnancy in a woman living with HIV continues to be an important health problem that involves not only the pregnant woman but also the product of pregnancy due to the high risk of transmitting the virus during pregnancy, the time of delivery and breastfeeding maternal. Despite the years the selected studies continue to report that the reduction of vertical transmission of HIV is achieved with the early diagnosis of the infection in the pregnant woman, reducing the maternal viral load using antiretroviral therapy in pregnancy and in timing of delivery, elective cesarean delivery, discontinuation of breastfeeding, and antiretroviral prophylaxis in the newborn.
9
artículo
Publicado 2021
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Infection by the human immunodeficiency virus (HIV) continues to be a perinatal health problem globally and in our country, due to the increase in contagion in pregnant women who run the risk of vertical transmission of HIV to their baby during the pregnancy, childbirth and breastfeeding. Various publications mention that the prevalence of vertical transmission of HIV varies according to different authors between 3.8% and 17%. In Peru it is reported at 4%. Among the risk factors associated with vertical transmission of HIV, the following are mentioned: absence of antiretroviral therapy during prenatal care with adjusted odds ratio (aOR) ranging from 2.41 to 17.20; absence of a program for the prevention of mother-to-child transmission of HIV with aORa of 4.6 to 40.6; absence of prenatal control ORa 4.6; home delivery with aOR of 3.35 to 8.10; emergency cesarean delivery with OR of 4.32; ...
10
artículo
Publicado 2021
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Infection by the human immunodeficiency virus (HIV) continues to be a perinatal health problem globally and in our country, due to the increase in contagion in pregnant women who run the risk of vertical transmission of HIV to their baby during the pregnancy, childbirth and breastfeeding. Various publications mention that the prevalence of vertical transmission of HIV varies according to different authors between 3.8% and 17%. In Peru it is reported at 4%. Among the risk factors associated with vertical transmission of HIV, the following are mentioned: absence of antiretroviral therapy during prenatal care with adjusted odds ratio (aOR) ranging from 2.41 to 17.20; absence of a program for the prevention of mother-to-child transmission of HIV with aORa of 4.6 to 40.6; absence of prenatal control ORa 4.6; home delivery with aOR of 3.35 to 8.10; emergency cesarean delivery with OR of 4.32; ...
11
artículo
Publicado 2009
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A bibliographic review was done to update and systematize information on Toxocara human infection. Transmission mechanisms, epidemiology, clinical forms, diagnostic methods and treatment are described. Its importance as an infectious cause of blindness in young people that is potentially preventible and curable by early diagnosis is emphasized. Proposal is done to establish epidemiological surveillance, improve current laws to reduce transmission risk to the general population and increase knowledge on this infection in Peru.
12
tesis doctoral
Publicado 2021
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El objetivo de esta tesis es analizar, desarrollar e implementar esquemas primales y mixtos para ciertos problemas elípticos, basados en la filosofía de los métodos híbridos de alto orden (HHO). Hacemos uso de resultados conocidos, como el Lema de Lax-Milgram, para formulaciones primales, y la teoría de Babuˇska-Brezzi, para esquemas mixtos, con el propósito de establecer existencia y unicidad de problemas lineales y no lineales que surgen en el contexto de problemas físicos, como por ejemplo en la mecánica de fluidos. Establecemos la solubilidad única de los problemas continuo y discreto, con su estimación de error a priori correspondiente, para el problema de Neumann, una cierta clase de problemas elípticos no lineales y para problemas de transmisión interior. En cada uno de los capítulos desarrollados, se incluye varios experimentos numéricos, que ilustran el buen desem...
13
tesis doctoral
The vehicle routing problem is one of the most studied problems in Operations Re-search. Different variants have been treated in the past 50 years and with technological advances, new challenges appear. In this thesis, we introduce a new variation of the VRP appearing in wireless networks. The new characteristic added to this well-know problem is the possibility of pick-up information via wireless transmissions. In the con-text considered here, a unique base station is connected with the outside and a vehicle is responsible for collecting information via wireless connection to the vehicle when it is located in another sufficiently close station. Simultaneous transmissions are permitted. Time of transmission depends on the distance between stations, the amount of infor-mation transmitted, and other physical factors (e.g obstacles along the way, installed equipment). Information to be sent...
14
artículo
Publicado 2020
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El problema central de reflexión es la discontinuidad de la transmisión del idioma quechua entre dos generaciones (padres/hijos). La pregunta desde la cual se parte es la siguiente: ¿por qué quienes saben quechua no enseñan a sus hijos este idioma? Hay una secuencia lógica del derrotero seguido: referencias históricas y las oportunidades perdidas, datos cuantitativos para ver su evolución, una introspección personal y la elaboración de las conclusiones.
15
artículo
Publicado 2011
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Estudiaremos el Comportamiento asintótico para un problema de transmisión nolineal con amortiguamiento localmente distribuido y con memoria en la frontera dado por el sistema siguiente, ...
16
artículo
Publicado 2011
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We will study the asymptotic Behavior for a problem of transmission nonlinear with damping locally distributed and with memory at the chosen to boundary for the system following,
17
tesis de grado
Publicado 2023
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El presente trabajo constituye un aporte a la ingeniería civil a través de la optimización del gerenciamiento de los proyectos de construcción de subestaciones eléctricas en el Perú, específicamente en la gestión de riesgos que impactan en el cumplimiento del plazo de los proyectos en mención. Inicialmente se analizó la problemática actual de los proyectos de transmisión de energía eléctrica en el Perú, entre los cuales se tiene la construcción de subestaciones y líneas de transmisión, realizando un análisis de cuáles fueron los riesgos que impactaron en proyectos ya culminados. Asimismo, se identificó cuáles fueron las desviaciones de plazo ocurridas en el histórico de proyectos de construcción de proyectos de transmisión en el país, llegando a la conclusión de que dichas obras tienen una desviación promedio de seis meses fuera de plazo. De igual manera se es...
18
artículo
Publicado 2022
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Viruses have been present throughout human history, causing diseases due to infections and food poisoning; they have caused frequent public health problems worldwide. These illnesses are usually mild, moderate, or severe in nature. The personal hygiene of food handlers and processing processes should be checked periodically. Virus detection protocols and safety measures should be continually reviewed as viruses change their mode of infection. The objective of this review was to discuss the possible routes of virus transmission to humans through food. Important topics have been reviewed such as: definition of food viruses, presence, and types of viruses in food, enteric viruses, zoonotic viruses, water as a means of transmission, risks of infection, other non-conventional foods as potential transmitters of viruses and food safety, in addition to current and future challenges, research wor...
19
tesis de grado
Publicado 2018
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El presente trabajo titulado Automatización del Manifiesto de carga aéreo de exportación de aerolíneas en Talma S.A, tiene el propósito de automatizar la elaboración del manifiesto de carga. Se ha usado el método de investigación tomando como problema ¿Cómo automatizar el manifiesto de carga de aerolíneas en Talma S.A.? el resultado es que se puede realizar mediante la incorporación de una extensión al Talmanet, un aplicativo de Talma, se concluye que se debe evaluar la importancia del proyecto en relación al proceso productivo y el costo total para determinar si la inversión traerá un beneficio.
20
artículo
Publicado 2022
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Cocoa (Theobroma cacao L.) is one of the main crops in Latin American and African countries, its almonds being marketed to produce chocolate. However, different biotic factors can negatively affect the crop production, especially on small farms where management by farmers is scarce or nonexistent. Lethal wilt (Ceratocystis cacaofunesta Engelbrecht & Harrington) together with beetle borers (Coleoptera: Curculionidae: Scolytinae), continue to be the main problems affecting cocoa. It has been observed that both organisms interact intrinsically inside the trunks of cacao trees. Despite the importance of this interaction, in general, the countless research and review articles carried out to date have focused mainly on studying each biotic factor separately or have been addressed in a general way. Thus, in this review we mainly focus on the interaction between the Lethal wilt and the borer...
