Los softwares dietoterapéuticos consti- tuyen actualmente una herramienta básica en el tratamient... more Los softwares dietoterapéuticos consti- tuyen actualmente una herramienta básica en el tratamiento dietético de pacientes, ya sea desde un punto de vista fisiológico y/o patológico. Las nuevas tecnologías y la investigación en este sentido, han favorecido la aparición de nuevas aplicaciones de gestión dietético-nutricional que facilitan la gestión de la empresa dietoterapéutica. Oetivos Estudiar comparativamente las principales aplicaciones dietoterapéuticas existentes en el mercado para dar criterio a los usuarios profesionales de la dietética y nutrición en la selección de una de las principales herramientas para éstos. Resultaos Desde nuestro punto de vista, dietopro. com resulta, junto con otras de las aplicaciones dietoterapéuticas analizadas, una de las más completas para la gestión de la clínica nutricional. Conclusin En función de la necesidad del usuario, éste dispone de diferentes softwares dietéticos donde elegir. Se concluye que la selección de una u otra, depende de las necesidades del profesional.
Tecnica Economica Administracion Y Direccion De Empresas, 2012
La apuesta por la calidad es un factor insoslayable si se quieren tener las claves de permanencia... more La apuesta por la calidad es un factor insoslayable si se quieren tener las claves de permanencia y crecimiento en un mercado tan complejo como el de la auditoria de cuentas. A lo largo de estas paginas no se plantea una exegesis juridica de la materia que regula el control de calidad o inspeccion, sino que se pretende desarrollar una serie de items que ayuden a considerarlo como un elemento imprescindible para ejercer la actividad de la auditoria de cuentas, aun sin perder el pie en la legislacion vigente.
El objetivo de este trabajo es encontrar una formulacion matematica que proporcione, de una forma... more El objetivo de este trabajo es encontrar una formulacion matematica que proporcione, de una forma practica y sencilla, una estimacion adecuada del valor de la ondulacion del geoide en Asturias. Se trata pues, de la continuacion de un estudio inicial en el que se intento resolver el problema en la zona central de Asturias haciendo uso de las tecnicas GPS, ampliandolo en esta ocasion a las zonas occidental y oriental de la region asturiana, con el fin de proponer el modelo matematico explicito que permita conocer una estimacion de la forma del geoide en el ambito territorial afectado en funcion de las coordenadas UTM de un punto cualquiera del mismo.
IEEE Journal on Selected Areas in Communications, 2015
The Discontinuous Reception (DRX) mechanism is commonly employed in current LTE networks to impro... more The Discontinuous Reception (DRX) mechanism is commonly employed in current LTE networks to improve energy efficiency of user equipment (UE). DRX allows UEs to monitor the physical downlink control channel (PDCCH) discontinuously when there is no downlink traffic for them, thus reducing their energy consumption. However, DRX power savings are achieved at the expense of some increase in packet delay since downlink traffic transmission must be deferred until the UEs resume listening to the PDCCH. In this paper, we present a promising mechanism that reduces energy consumption of UEs using DRX while simultaneously maintaining average packet delay around a desired target. Furthermore, our proposal is able to achieve significant power savings without either increasing signaling overhead or requiring any changes to deployed wireless protocols.
The energy demands of Ethernet links have been an active focus of research in the recent years. T... more The energy demands of Ethernet links have been an active focus of research in the recent years. This work has enabled a new generation of Energy Efficient Ethernet (EEE) interfaces able to adapt their power consumption to the actual traffic demands, thus yielding significant energy savings. With the energy consumption of single network connections being a solved problem, in this paper we focus on the energy demands of link aggregates that are commonly used to increase the capacity of a network connection. We build on known energy models of single EEE links to derive the energy demands of the whole aggregate as a function on how the traffic load is spread among its powered links. We then provide a practical method to share the load that minimizes overall energy consumption with controlled packet delay, and prove that it is valid for a wide range of EEE links. Finally, we validate our method with both synthetic and real traffic traces captured in Internet backbones.
Receiver-initiated medium access control protocols for wireless sensor networks are theoretically... more Receiver-initiated medium access control protocols for wireless sensor networks are theoretically able to adapt to changing network conditions in a distributed manner. However, existing algorithms rely on fixed beacon rates at each receiver. We present a new received initiated MAC protocol that adapts the beacon rate at each receiver to its actual traffic load. Our proposal uses a computationally inexpensive formula for calculating the optimum beacon rate that minimizes network energy consumption and, so, it can be easily adopted by receivers. Simulation results show that our proposal reduces collisions and diminishes delivery time maintaining a low duty cycle.
Nutricion hospitalaria: organo oficial de la Sociedad Espanola de Nutricion Parenteral y Enteral
Introduction: Overweight and obesity are both in Europe and in Spain, one of the major public hea... more Introduction: Overweight and obesity are both in Europe and in Spain, one of the major public health problems since they are associated with cardiovascular risk factors and the occurrence of other diseases. Nowadays, the prevalence of obesity SEEDO in Spanish society is about 25%. In addition to evaluating how our lifestyle habits influence in our weight, it would be interesting to assess how the festivity days, which in many cases are often extended beyond officially holidays, can influence the total annual weight gain. Methods: A prospective and descriptive study was conducted in a total of 258 patients (95 men and 163 women) undergoing a treatment for weight reduction, at least during one month ago. We studied seven holiday periods. Results: In all patients, there was a significant linear correlation (p.
un agregado de flujos esta formado por un conjunto de paquetes, pertenecientes a uno o a varios f... more un agregado de flujos esta formado por un conjunto de paquetes, pertenecientes a uno o a varios flujos IP (Internet Protocol), que tienen alguna propiedad en comun y que desean recibir el mismo servicio entre dos nodos de la red. Independientemente de los protocolos que controlen cada uno de los flujos individuales, seria conveniente que los agregados respondiesen a la congestion como una sola entidad. En este articulo presentamos una nueva tecnica, denominada Ping Trunking, capaz de controlar agregados de forma transparente a los usuarios finales modificando unicamente los nodos de acceso a la red. Ademas, el esquema propuesto no causa variaciones excesivamente pronunciadas en la tasa de transmision de los agregados y reduce el nivel de ocupacion de las colas en el interior de la red
2012 17th European Conference on Networks and Optical Communications, 2012
ABSTRACT Switching the operating state on machines is probably the simpler way to reduce the ener... more ABSTRACT Switching the operating state on machines is probably the simpler way to reduce the energy consumption of otherwise non energy-aware devices. Indeed, many energy-aware systems allow two states of operation: a low power idle (LPI) mode, in which the system is unable to process data, and a fully working mode. For networking equipment, packet coalescing is the best known algorithm for managing the LPI mode and has been proved able to get power savings nearing theoretical limits at the expense of packet delay when properly tuned. However, in real networks with non stationary traffic conditions, static tuning induces higher than necessary delays. In this paper we present the first dynamic algorithm that adapts packet coalescing configuration parameters to the real time traffic characteristics. Simulation results show that our algorithm is capable of achieving a given target energy efficiency while keeping packet delay as low as possible.
Quality of Service differentiation is an open research issue in optical burst switching (OBS) net... more Quality of Service differentiation is an open research issue in optical burst switching (OBS) networks. Most proposals assume full wavelength-conversion, but wavelength converters are still very complex and expensive, and accordingly limited and no wavelength conversion OBS networks are likely to be the most common scenarios. In this paper, we define and analyze the QoS Multiple Wavelength Simultaneous Transmission technique (QoS-MWST), a novel method for providing loss differentiation in OBS networks with limited or no wavelength-conversion capability. In QoS-MWST, multiple copies of each burst are simultaneously sent on different wavelengths, so as to increase the chances of data delivery, and loss differentiation is achieved by properly sending more copies of the higher-priority bursts. Through analysis and extensive simulation experiments, we demonstrate that QoS-MWST can provide loss differentiation in OBS networks without full wavelength-conversion capability more efficiently than other differentiation techniques proposed in the literature.
ABSTRACT Current networking equipment usually provides several energy profiles with different per... more ABSTRACT Current networking equipment usually provides several energy profiles with different performance capabilities. For example, in EPON systems, ONUs are able to switch their transmitters off when there is no data to transmit. This low power mode, known as doze mode, can significantly reduce power consumption in EPONs if wisely used. In this paper, we evaluate through simulation the potential power savings that can be obtained using this mode in many different scenarios. In particular, we analyze the impact of the DBA algorithm and the mode governor on both energy efficiency and frame delay with different implementations of the doze mode.
Los softwares dietoterapéuticos consti- tuyen actualmente una herramienta básica en el tratamient... more Los softwares dietoterapéuticos consti- tuyen actualmente una herramienta básica en el tratamiento dietético de pacientes, ya sea desde un punto de vista fisiológico y/o patológico. Las nuevas tecnologías y la investigación en este sentido, han favorecido la aparición de nuevas aplicaciones de gestión dietético-nutricional que facilitan la gestión de la empresa dietoterapéutica. Oetivos Estudiar comparativamente las principales aplicaciones dietoterapéuticas existentes en el mercado para dar criterio a los usuarios profesionales de la dietética y nutrición en la selección de una de las principales herramientas para éstos. Resultaos Desde nuestro punto de vista, dietopro. com resulta, junto con otras de las aplicaciones dietoterapéuticas analizadas, una de las más completas para la gestión de la clínica nutricional. Conclusin En función de la necesidad del usuario, éste dispone de diferentes softwares dietéticos donde elegir. Se concluye que la selección de una u otra, depende de las necesidades del profesional.
Tecnica Economica Administracion Y Direccion De Empresas, 2012
La apuesta por la calidad es un factor insoslayable si se quieren tener las claves de permanencia... more La apuesta por la calidad es un factor insoslayable si se quieren tener las claves de permanencia y crecimiento en un mercado tan complejo como el de la auditoria de cuentas. A lo largo de estas paginas no se plantea una exegesis juridica de la materia que regula el control de calidad o inspeccion, sino que se pretende desarrollar una serie de items que ayuden a considerarlo como un elemento imprescindible para ejercer la actividad de la auditoria de cuentas, aun sin perder el pie en la legislacion vigente.
El objetivo de este trabajo es encontrar una formulacion matematica que proporcione, de una forma... more El objetivo de este trabajo es encontrar una formulacion matematica que proporcione, de una forma practica y sencilla, una estimacion adecuada del valor de la ondulacion del geoide en Asturias. Se trata pues, de la continuacion de un estudio inicial en el que se intento resolver el problema en la zona central de Asturias haciendo uso de las tecnicas GPS, ampliandolo en esta ocasion a las zonas occidental y oriental de la region asturiana, con el fin de proponer el modelo matematico explicito que permita conocer una estimacion de la forma del geoide en el ambito territorial afectado en funcion de las coordenadas UTM de un punto cualquiera del mismo.
IEEE Journal on Selected Areas in Communications, 2015
The Discontinuous Reception (DRX) mechanism is commonly employed in current LTE networks to impro... more The Discontinuous Reception (DRX) mechanism is commonly employed in current LTE networks to improve energy efficiency of user equipment (UE). DRX allows UEs to monitor the physical downlink control channel (PDCCH) discontinuously when there is no downlink traffic for them, thus reducing their energy consumption. However, DRX power savings are achieved at the expense of some increase in packet delay since downlink traffic transmission must be deferred until the UEs resume listening to the PDCCH. In this paper, we present a promising mechanism that reduces energy consumption of UEs using DRX while simultaneously maintaining average packet delay around a desired target. Furthermore, our proposal is able to achieve significant power savings without either increasing signaling overhead or requiring any changes to deployed wireless protocols.
The energy demands of Ethernet links have been an active focus of research in the recent years. T... more The energy demands of Ethernet links have been an active focus of research in the recent years. This work has enabled a new generation of Energy Efficient Ethernet (EEE) interfaces able to adapt their power consumption to the actual traffic demands, thus yielding significant energy savings. With the energy consumption of single network connections being a solved problem, in this paper we focus on the energy demands of link aggregates that are commonly used to increase the capacity of a network connection. We build on known energy models of single EEE links to derive the energy demands of the whole aggregate as a function on how the traffic load is spread among its powered links. We then provide a practical method to share the load that minimizes overall energy consumption with controlled packet delay, and prove that it is valid for a wide range of EEE links. Finally, we validate our method with both synthetic and real traffic traces captured in Internet backbones.
Receiver-initiated medium access control protocols for wireless sensor networks are theoretically... more Receiver-initiated medium access control protocols for wireless sensor networks are theoretically able to adapt to changing network conditions in a distributed manner. However, existing algorithms rely on fixed beacon rates at each receiver. We present a new received initiated MAC protocol that adapts the beacon rate at each receiver to its actual traffic load. Our proposal uses a computationally inexpensive formula for calculating the optimum beacon rate that minimizes network energy consumption and, so, it can be easily adopted by receivers. Simulation results show that our proposal reduces collisions and diminishes delivery time maintaining a low duty cycle.
Nutricion hospitalaria: organo oficial de la Sociedad Espanola de Nutricion Parenteral y Enteral
Introduction: Overweight and obesity are both in Europe and in Spain, one of the major public hea... more Introduction: Overweight and obesity are both in Europe and in Spain, one of the major public health problems since they are associated with cardiovascular risk factors and the occurrence of other diseases. Nowadays, the prevalence of obesity SEEDO in Spanish society is about 25%. In addition to evaluating how our lifestyle habits influence in our weight, it would be interesting to assess how the festivity days, which in many cases are often extended beyond officially holidays, can influence the total annual weight gain. Methods: A prospective and descriptive study was conducted in a total of 258 patients (95 men and 163 women) undergoing a treatment for weight reduction, at least during one month ago. We studied seven holiday periods. Results: In all patients, there was a significant linear correlation (p.
un agregado de flujos esta formado por un conjunto de paquetes, pertenecientes a uno o a varios f... more un agregado de flujos esta formado por un conjunto de paquetes, pertenecientes a uno o a varios flujos IP (Internet Protocol), que tienen alguna propiedad en comun y que desean recibir el mismo servicio entre dos nodos de la red. Independientemente de los protocolos que controlen cada uno de los flujos individuales, seria conveniente que los agregados respondiesen a la congestion como una sola entidad. En este articulo presentamos una nueva tecnica, denominada Ping Trunking, capaz de controlar agregados de forma transparente a los usuarios finales modificando unicamente los nodos de acceso a la red. Ademas, el esquema propuesto no causa variaciones excesivamente pronunciadas en la tasa de transmision de los agregados y reduce el nivel de ocupacion de las colas en el interior de la red
2012 17th European Conference on Networks and Optical Communications, 2012
ABSTRACT Switching the operating state on machines is probably the simpler way to reduce the ener... more ABSTRACT Switching the operating state on machines is probably the simpler way to reduce the energy consumption of otherwise non energy-aware devices. Indeed, many energy-aware systems allow two states of operation: a low power idle (LPI) mode, in which the system is unable to process data, and a fully working mode. For networking equipment, packet coalescing is the best known algorithm for managing the LPI mode and has been proved able to get power savings nearing theoretical limits at the expense of packet delay when properly tuned. However, in real networks with non stationary traffic conditions, static tuning induces higher than necessary delays. In this paper we present the first dynamic algorithm that adapts packet coalescing configuration parameters to the real time traffic characteristics. Simulation results show that our algorithm is capable of achieving a given target energy efficiency while keeping packet delay as low as possible.
Quality of Service differentiation is an open research issue in optical burst switching (OBS) net... more Quality of Service differentiation is an open research issue in optical burst switching (OBS) networks. Most proposals assume full wavelength-conversion, but wavelength converters are still very complex and expensive, and accordingly limited and no wavelength conversion OBS networks are likely to be the most common scenarios. In this paper, we define and analyze the QoS Multiple Wavelength Simultaneous Transmission technique (QoS-MWST), a novel method for providing loss differentiation in OBS networks with limited or no wavelength-conversion capability. In QoS-MWST, multiple copies of each burst are simultaneously sent on different wavelengths, so as to increase the chances of data delivery, and loss differentiation is achieved by properly sending more copies of the higher-priority bursts. Through analysis and extensive simulation experiments, we demonstrate that QoS-MWST can provide loss differentiation in OBS networks without full wavelength-conversion capability more efficiently than other differentiation techniques proposed in the literature.
ABSTRACT Current networking equipment usually provides several energy profiles with different per... more ABSTRACT Current networking equipment usually provides several energy profiles with different performance capabilities. For example, in EPON systems, ONUs are able to switch their transmitters off when there is no data to transmit. This low power mode, known as doze mode, can significantly reduce power consumption in EPONs if wisely used. In this paper, we evaluate through simulation the potential power savings that can be obtained using this mode in many different scenarios. In particular, we analyze the impact of the DBA algorithm and the mode governor on both energy efficiency and frame delay with different implementations of the doze mode.
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