Una trayectoria representa la evolucion de la posicion de un objeto movil en un espacio durante u... more Una trayectoria representa la evolucion de la posicion de un objeto movil en un espacio durante un periodo. Cuando se estan registrando los datos de una trayectoria pueden ocurrir fallas en la transmision generando ausencias de informacion. En este articulo, se extiende el modelo de trayectorias de Spaccapietra al incorporar la ausencia de informacion como un componente de una trayectoria. La ausencia de informacion se considera con respecto a la posicion del objeto y a otros atributos de la trayectoria (atributos complementarios). Se propone una clasificacion para estos atributos, dependiendo de si son constantes o variables durante los stops y los moves (los stops y los moves son partes de una trayectoria segun el modelo de Spaccapietra). Ademas se proponen dos algoritmos: i) para convertir una secuencia de observaciones de una trayectoria en stops , moves y ausencias y ii) para verificar que la informacion almacenada de los atributos cuyos valores deben ser constantes sea consist...
2nd International Conference on Testbeds and Research Infrastructures for the Development of Networks and Communities, 2006. TRIDENTCOM 2006., 2006
Abstract Forthcoming wireless communication systems, well represented by the term beyond 3G, are ... more Abstract Forthcoming wireless communication systems, well represented by the term beyond 3G, are likely to impose some new requirements that go beyond the traditional view on today's networking paradigm. In particular, mobility procedures will no longer be restricted ...
El área de estudio se ubica en el límite Cordillera Occidental – Altiplano del sur del Perú, dent... more El área de estudio se ubica en el límite Cordillera Occidental – Altiplano del sur del Perú, dentro de la Franja Metalogenética Epitermal de Au-Ag del Mioceno hospedados en rocas volcánicas cenozoicas (Carlotto et al. 2009). Durante el Oligoceno superior – Plioceno, se establecieron en la Cordillera Occidental arcos magmáticos asociados a grandes periodos de volcanismo explosivo y efusivo (Mamani et al. 2009), dejando como producto de esta actividad potentes depósitos de flujos piroclásticos, flujos de lava y secuencias volcanoclásticas. En este contexto, en el sector Condoroma-Paratía contemporáneo a estas unidades se emplazaron yacimientos epitermales tales como Antonio Raimondi, Cata y Condoroma, así como numerosas ocurrencias y anomalías. Estos yacimientos contienen principalmente minerales portadores de plata-oro y están controlados por grandes estructuras NO – SE. El presente estudio busca establecer las bases para conocer la relación entre la mineralización, estructuras, estr...
Eguana es un proyecto inspirado en el concepto de E-Procurement. Entre muchas cosas, E-Procuremen... more Eguana es un proyecto inspirado en el concepto de E-Procurement. Entre muchas cosas, E-Procurement busca una convergencia entre proveedores y compradores en una empresa. Eguana implementa esta convergencia usando J2EE, demostrando el poder y alcance de esta tecnología. StoreFront es el módulo de Eguana encargado de manejar la interacción directa entre compradores y vendedores. En este módulo se usa el espectro completo de la tecnología J2EE desarrollado con diversas herramientas de código abierto, sirviendo así como una prueba de concepto de esta tecnología. Eguana es hasta el momento el único proyecto E-Procurement código abierto de propósito general disponible. Eguana implementa el concepto E-Procurement de una manera económica, lo cuál permite su uso en negocios pequeños y medianos.
2006 IEEE/IFIP Network Operations and Management Symposium NOMS 2006, 2006
Abstract This paper presents a hierarchical management architecture which has been designed to wo... more Abstract This paper presents a hierarchical management architecture which has been designed to work over next generation WPAN environments. In this sense, it copes with eg ad hoc networks (likely to play a fundamental role within future wireless networks) as well ...
2007 International Conference on Sensor Technologies and Applications (SENSORCOMM 2007), 2007
Gathering different pieces of information about the environmental parameters within certain place... more Gathering different pieces of information about the environmental parameters within certain places is becoming a cornerstone for a set of applications and services and is, in fact, bringing about the appearance of new ones. Wireless sensor networks (WSN) appear as a key enabler for this sort of functionality, being able to obtain the required information and transmitting it to concentrator
Future wireless communication scenarios will be characterized by the heterogeneity in terms of co... more Future wireless communication scenarios will be characterized by the heterogeneity in terms of coexisting wireless access technologies. Many mobile terminals will support different air interfaces and in order to provide true multimode operation, the sole use of IP protocol is not enough. We present in this document the Universal Convergence Layer that residing on top of the different air interfaces offers a single interface to IP while supporting the cross-layer optimization of user data flows as well as many other key functionalities in personal networks communications. This document describes and discusses the implementation of this framework over real platforms. Furthermore, the results of the measurement campaign carried out to assess the benefits introduced by the dynamic interface selection mechanism implemented at the UCL will be also presented. The results obtained will allow us to extract conclusions about the appropriateness of the solution adopted.
BACKGROUND AND OBJECTIVE: Prevalence of sleep apnea-hypopnea syndrome (SAHS) in end-stage renal d... more BACKGROUND AND OBJECTIVE: Prevalence of sleep apnea-hypopnea syndrome (SAHS) in end-stage renal disease (ESRD) is high and the polygraphy has not been validated as diagnostic technique in this group of patients. The objective of this study was to evaluate if only the cardiorespiratory analysis is valid for the diagnosis of SAHS. PATIENTS AND METHOD: 48 patients with ESRD were studied consecutively with all-night polysomnography. We compared the desaturation index of SaO 2 ≥ 4% (DI4), sleep time spent with SaO 2 < 90% (T90) and the apnea-hypopnea index (AHI) per hour of sleep wilh the results of the cardiorespiratory analysis. RESULTS: We included 35 men and 13 women, age: 54 (16) years and IMC: 27.1. Eighteen patients were diagnosed of SAHS (37.5%). The cardiorespiratory analysis obtained a sensibility of 77.7%, specifity of 100%, positive predictive value was 100% and negative predictive was 88%. The polysomnography showed an AHI: 16 (17.2), while the cardiorespiratory analysis was 11 (13.2). There were a good correlation (r = 0.970) and concordance scores (CCI = 0.967; p < 0.001). The cardiorespiratory analysis, respect the polysomnography, also obtained a good correlation and concordance for ID4 (10 [11.8] vs 15 [15.5]) and for T90 (1 [2.9] vs 2 [4.7]; p < 0.001). In the COR curve, the best cutoff point of the cardiorespiratory analysis was an AIH = 7.2. CONCLUSIONS: In patients with ESRD, the cardiorespiratory analysis, is valid for the diagnosis and correctly detect the SaO 2 at night, both being key parameters for the diagnostic and treatment of SAHS. The polygraphy could be an alternative diagnostic test in the SAHS, although it has to be definitively validated.
Breast cancer is the most prevalent malignancy among women under 50. Improvements in diagnosis an... more Breast cancer is the most prevalent malignancy among women under 50. Improvements in diagnosis and treatment have yielded an important decrease in mortality in the last 20 years. In many cases, chemotherapy and radiotherapy develop side effects on the reproductive function. Therefore, before the anti-cancer treatment impairs fertility, clinicians should offer some techniques for fertility preservation for women planning motherhood in the future. Research 2 www.ecancer.org ecancer 2015, 9:504 Although many centres offer fertility preservation and many patients undergo ovarian stimulation, there are not enough studies to evaluate the recurrence, breast cancer-free interval or mortality rates in these women.
Background: Patients with COPD may share some clinical characteristics with asthma sufferers. Thi... more Background: Patients with COPD may share some clinical characteristics with asthma sufferers. This phenotypic overlap between COPD and asthma is not yet well characterised. Method: We have analysed data from the EPI-SCAN study, an epidemiological, populationbased study in Spain that included 3885 (40 to 80-year-old) subjects in order to investigate the clinical and systemic inflammatory characteristics of COPD patients previously diagnosed with asthma. Generic and COPD-specific quality of life, as well as physical activity, were also assessed through standardised and validated questionnaires. Results: A total of 385 (10.1%) subjects were diagnosed with COPD, 67 (17.4%) being classified with the COPDeasthma overlap phenotype. Such patients were more likely to have dyspnea and wheezing (p < 0.001 in both comparisons) and more frequent exacerbations (p < 0.001).
Aims: To characterize the distribution of BMI in a population-based sample of COPD patients and t... more Aims: To characterize the distribution of BMI in a population-based sample of COPD patients and to evaluate the impact of obesity on their health status, exercise tolerance, systemic inflammation and comorbidity. Methods: A population-based sample of 3,797 subjects aged 40-80 years from the EPI-SCAN study was selected. Subjects were categorized according their body mass index (BMI) as underweight (,18.5 kg/m 2), normal weight (18.5-24.9 kg/m 2), overweight (25.0-29.9 kg/m 2) or obese (BMI$30.0 kg/m 2). Subjects were evaluated with post-bronchodilator spirometry and 6-minute walk tests. Smoking habits, respiratory symptoms, generic and specific quality of life, daily physical activities, comorbidities and systemic inflammatory biomarkers were recorded. Results: The prevalence of obesity or being overweight was higher in the 382 COPD patients than in the subjects without airflow limitation (29.4%, 95%CI 24.8-33.9% vs. 24.3, 95%CI 22.9-25.8; and 44.7%, 95%CI 39.7-49.6% vs. 43.0%, 95%CI 41.3-44.6, respectively; p = 0.020). In the COPD subgroup, obese subjects presented more dyspnea and less chronic cough, chronic bronchitis or chronic phlegm than normal-weight patients, as well as a worse health status. Moreover, reduced exercise tolerance and higher plasmatic C-reactive protein levels were found in the obese patients, who also presented a greater prevalence of cardiovascular disease (adjusted odds ratio 4.796, 95%CI 1.806-12.736, p = 0.002). Conclusions: In a population-based sample, obesity is more prevalent in COPD patients than in subjects without airflow limitation. Furthermore, obesity affects the clinical manifestations, quality of life and exercise tolerance of COPD patients, and it may contribute to a phenotype characterized by increased systemic inflammation and greater frequency of cardiovascular comorbidity.
2008 IEEE Wireless Communications and Networking Conference, 2008
The upcoming of new wireless technologies, many of them working within license-free frequencies, ... more The upcoming of new wireless technologies, many of them working within license-free frequencies, has opened the door to a relatively large number of scenarios, which break the legacy one-hop paradigm which characterizes most of tradi-tional network ...
Revista Española de Cardiología (English Edition), 2005
diac events during 6-month follow-up were recorded. Results. Of the 911 discharged patients, 45 (... more diac events during 6-month follow-up were recorded. Results. Of the 911 discharged patients, 45 (5.3%) were admitted during follow-up: 9 (1.1%) underwent revascularization, 5 (0.6%) had a myocardial infarction (MI), and 2 (0.2%) died from cardiovascular disease. Patients with a high TRS had a significantly higher risk of reaching the composite endpoint of death, MI, or revascularization (relative risk per unit of TRS increase, 3.63; 95% CI, 2.20-6.00; P<.001). Of the patients who were initially admitted, 22 (6.4%) underwent revascularization, 4 (1.2%) had an MI, and 14 died (4.1%) from cardiovascular disease during follow-up. The relative risk of the composite endpoint per unit of TRS increase was 1.72 (95% CI, 1.32-2.24; P<.001). Conclusions. The TIMI risk score is useful for stratifying cardiovascular event risk in non-selected patients with chest pain. The score can identify high-risk patients
Cardiac surgery with extracorporeal circulation in obstetric patients is a separate chapter becau... more Cardiac surgery with extracorporeal circulation in obstetric patients is a separate chapter because of the physiological changes brought about by pregnancy and factors such as anesthetic management, monitoring and perfusion during the cardiopulmonary bypass that affects both the mother and the child; both experience different circumstances and have dissimilar interests. The paper discusses the anesthetic management of a patient during her 26.2 weeks of gestation with a pulmonary thromboembolism and atrial intracavitary thrombus attached to the central catheter with atrial septal defect.
Wireless Communications and Mobile Computing, 2002
Despite the growing interest for LMDS systems there have been only a few commercial implementatio... more Despite the growing interest for LMDS systems there have been only a few commercial implementations until now especially outside of the U.S.A. The use of hierarchical structure through two‐layer networking has been even rarer. In many cases LMDS systems have strong advantages against their competitors to cover the last mile. In this article, we review and analyze the standards currently available and describe the European two‐layer trial system developed in 1996–2000. We show why further development towards IP based LMDS is useful in the future. Most of our recommendations are based on results derived from the European Union supported research project CABSINET. It had the aim of demonstrating the viability of a 40 GHz cellular digital television system with a return channel to offer interactive services. Two systems were tested: a line of sight link using QPSK, and a non‐line of sight with COFDM modulation scheme. In the RF‐subsystems, the greatest difficulty of any viable LMDS syst...
This study aimed to determine COPD prevalence in Spain and identify the level of undiagnosis and ... more This study aimed to determine COPD prevalence in Spain and identify the level of undiagnosis and the impact of undiagnosed COPD on health-related quality of life (HRQL) and activities of daily living (ADL). We surveyed a population-based sample of 4,274 adults aged 40 to 80 years. They were invited to answer a questionnaire and undergo pre-and post-bronchodilator spirometry. COPD was defined as a postbronchodilator FEV1/FVC ratio of <0.70. For 3,802 participants with good-quality postbronchodilator spirometry, the overall prevalence of COPD was 10.2% (95% confidence interval 9.2%-11.1%) and was higher in men (15.1%) than in women (5.6%). The prevalence of COPD stage II or higher was 4.4% (95%CI; 3.8%-5.1%). The prevalence of COPD increased with age and with cigarette smoking and was higher in low educational levels. A previous diagnosis of COPD was reported by 27% of COPD cases only. Diagnosed patients had more severe disease, higher cumulative smoking consumption and more severely impaired HRQL compared with undiagnosed subjects. However, even patients with undiagnosed COPD stage I+ already showed impairment in HRQL and in some aspects of ADL compared with participants without COPD. The prevalence of COPD in individuals between 40 and 80 years of age in Spain is 10.2% and increases with age, smoking consumption and lower educational levels. The rate of undiagnosis is very high and undiagnosed individuals with COPD already have a significant impairment in HRQL and ADL.
Improving efficiency of city services and facilitating a more sustainable development of cities a... more Improving efficiency of city services and facilitating a more sustainable development of cities are the main drivers of the smart city concept. Information and Communication Technologies (ICT) play a crucial role in making cities smarter, more accessible and more open. In this paper we present a novel architecture exploiting major concepts from the Future Internet (FI) paradigm addressing the challenges that need to be overcome when creating smarter cities. This architecture takes advantage of both the critical communications infrastructures already in place and owned by the utilities as well as of the infrastructure belonging to the city municipalities to accelerate efficient provision of existing and new city services. The paper highlights how FI technologies create the necessary glue and logic that allows the integration of current vertical and isolated city services into a holistic solution, which enables a huge forward leap for the efficiency and sustainability of our cities. Moreover, the paper describes a real-world prototype, that instantiates the aforementioned architecture, deployed in one of the parks of the city of Santander providing an autonomous public street lighting adaptation service. This prototype is a showcase on how added-value services can be seamlessly created on top of the proposed architecture.
Una trayectoria representa la evolucion de la posicion de un objeto movil en un espacio durante u... more Una trayectoria representa la evolucion de la posicion de un objeto movil en un espacio durante un periodo. Cuando se estan registrando los datos de una trayectoria pueden ocurrir fallas en la transmision generando ausencias de informacion. En este articulo, se extiende el modelo de trayectorias de Spaccapietra al incorporar la ausencia de informacion como un componente de una trayectoria. La ausencia de informacion se considera con respecto a la posicion del objeto y a otros atributos de la trayectoria (atributos complementarios). Se propone una clasificacion para estos atributos, dependiendo de si son constantes o variables durante los stops y los moves (los stops y los moves son partes de una trayectoria segun el modelo de Spaccapietra). Ademas se proponen dos algoritmos: i) para convertir una secuencia de observaciones de una trayectoria en stops , moves y ausencias y ii) para verificar que la informacion almacenada de los atributos cuyos valores deben ser constantes sea consist...
2nd International Conference on Testbeds and Research Infrastructures for the Development of Networks and Communities, 2006. TRIDENTCOM 2006., 2006
Abstract Forthcoming wireless communication systems, well represented by the term beyond 3G, are ... more Abstract Forthcoming wireless communication systems, well represented by the term beyond 3G, are likely to impose some new requirements that go beyond the traditional view on today&#x27;s networking paradigm. In particular, mobility procedures will no longer be restricted ...
El área de estudio se ubica en el límite Cordillera Occidental – Altiplano del sur del Perú, dent... more El área de estudio se ubica en el límite Cordillera Occidental – Altiplano del sur del Perú, dentro de la Franja Metalogenética Epitermal de Au-Ag del Mioceno hospedados en rocas volcánicas cenozoicas (Carlotto et al. 2009). Durante el Oligoceno superior – Plioceno, se establecieron en la Cordillera Occidental arcos magmáticos asociados a grandes periodos de volcanismo explosivo y efusivo (Mamani et al. 2009), dejando como producto de esta actividad potentes depósitos de flujos piroclásticos, flujos de lava y secuencias volcanoclásticas. En este contexto, en el sector Condoroma-Paratía contemporáneo a estas unidades se emplazaron yacimientos epitermales tales como Antonio Raimondi, Cata y Condoroma, así como numerosas ocurrencias y anomalías. Estos yacimientos contienen principalmente minerales portadores de plata-oro y están controlados por grandes estructuras NO – SE. El presente estudio busca establecer las bases para conocer la relación entre la mineralización, estructuras, estr...
Eguana es un proyecto inspirado en el concepto de E-Procurement. Entre muchas cosas, E-Procuremen... more Eguana es un proyecto inspirado en el concepto de E-Procurement. Entre muchas cosas, E-Procurement busca una convergencia entre proveedores y compradores en una empresa. Eguana implementa esta convergencia usando J2EE, demostrando el poder y alcance de esta tecnología. StoreFront es el módulo de Eguana encargado de manejar la interacción directa entre compradores y vendedores. En este módulo se usa el espectro completo de la tecnología J2EE desarrollado con diversas herramientas de código abierto, sirviendo así como una prueba de concepto de esta tecnología. Eguana es hasta el momento el único proyecto E-Procurement código abierto de propósito general disponible. Eguana implementa el concepto E-Procurement de una manera económica, lo cuál permite su uso en negocios pequeños y medianos.
2006 IEEE/IFIP Network Operations and Management Symposium NOMS 2006, 2006
Abstract This paper presents a hierarchical management architecture which has been designed to wo... more Abstract This paper presents a hierarchical management architecture which has been designed to work over next generation WPAN environments. In this sense, it copes with eg ad hoc networks (likely to play a fundamental role within future wireless networks) as well ...
2007 International Conference on Sensor Technologies and Applications (SENSORCOMM 2007), 2007
Gathering different pieces of information about the environmental parameters within certain place... more Gathering different pieces of information about the environmental parameters within certain places is becoming a cornerstone for a set of applications and services and is, in fact, bringing about the appearance of new ones. Wireless sensor networks (WSN) appear as a key enabler for this sort of functionality, being able to obtain the required information and transmitting it to concentrator
Future wireless communication scenarios will be characterized by the heterogeneity in terms of co... more Future wireless communication scenarios will be characterized by the heterogeneity in terms of coexisting wireless access technologies. Many mobile terminals will support different air interfaces and in order to provide true multimode operation, the sole use of IP protocol is not enough. We present in this document the Universal Convergence Layer that residing on top of the different air interfaces offers a single interface to IP while supporting the cross-layer optimization of user data flows as well as many other key functionalities in personal networks communications. This document describes and discusses the implementation of this framework over real platforms. Furthermore, the results of the measurement campaign carried out to assess the benefits introduced by the dynamic interface selection mechanism implemented at the UCL will be also presented. The results obtained will allow us to extract conclusions about the appropriateness of the solution adopted.
BACKGROUND AND OBJECTIVE: Prevalence of sleep apnea-hypopnea syndrome (SAHS) in end-stage renal d... more BACKGROUND AND OBJECTIVE: Prevalence of sleep apnea-hypopnea syndrome (SAHS) in end-stage renal disease (ESRD) is high and the polygraphy has not been validated as diagnostic technique in this group of patients. The objective of this study was to evaluate if only the cardiorespiratory analysis is valid for the diagnosis of SAHS. PATIENTS AND METHOD: 48 patients with ESRD were studied consecutively with all-night polysomnography. We compared the desaturation index of SaO 2 ≥ 4% (DI4), sleep time spent with SaO 2 < 90% (T90) and the apnea-hypopnea index (AHI) per hour of sleep wilh the results of the cardiorespiratory analysis. RESULTS: We included 35 men and 13 women, age: 54 (16) years and IMC: 27.1. Eighteen patients were diagnosed of SAHS (37.5%). The cardiorespiratory analysis obtained a sensibility of 77.7%, specifity of 100%, positive predictive value was 100% and negative predictive was 88%. The polysomnography showed an AHI: 16 (17.2), while the cardiorespiratory analysis was 11 (13.2). There were a good correlation (r = 0.970) and concordance scores (CCI = 0.967; p < 0.001). The cardiorespiratory analysis, respect the polysomnography, also obtained a good correlation and concordance for ID4 (10 [11.8] vs 15 [15.5]) and for T90 (1 [2.9] vs 2 [4.7]; p < 0.001). In the COR curve, the best cutoff point of the cardiorespiratory analysis was an AIH = 7.2. CONCLUSIONS: In patients with ESRD, the cardiorespiratory analysis, is valid for the diagnosis and correctly detect the SaO 2 at night, both being key parameters for the diagnostic and treatment of SAHS. The polygraphy could be an alternative diagnostic test in the SAHS, although it has to be definitively validated.
Breast cancer is the most prevalent malignancy among women under 50. Improvements in diagnosis an... more Breast cancer is the most prevalent malignancy among women under 50. Improvements in diagnosis and treatment have yielded an important decrease in mortality in the last 20 years. In many cases, chemotherapy and radiotherapy develop side effects on the reproductive function. Therefore, before the anti-cancer treatment impairs fertility, clinicians should offer some techniques for fertility preservation for women planning motherhood in the future. Research 2 www.ecancer.org ecancer 2015, 9:504 Although many centres offer fertility preservation and many patients undergo ovarian stimulation, there are not enough studies to evaluate the recurrence, breast cancer-free interval or mortality rates in these women.
Background: Patients with COPD may share some clinical characteristics with asthma sufferers. Thi... more Background: Patients with COPD may share some clinical characteristics with asthma sufferers. This phenotypic overlap between COPD and asthma is not yet well characterised. Method: We have analysed data from the EPI-SCAN study, an epidemiological, populationbased study in Spain that included 3885 (40 to 80-year-old) subjects in order to investigate the clinical and systemic inflammatory characteristics of COPD patients previously diagnosed with asthma. Generic and COPD-specific quality of life, as well as physical activity, were also assessed through standardised and validated questionnaires. Results: A total of 385 (10.1%) subjects were diagnosed with COPD, 67 (17.4%) being classified with the COPDeasthma overlap phenotype. Such patients were more likely to have dyspnea and wheezing (p < 0.001 in both comparisons) and more frequent exacerbations (p < 0.001).
Aims: To characterize the distribution of BMI in a population-based sample of COPD patients and t... more Aims: To characterize the distribution of BMI in a population-based sample of COPD patients and to evaluate the impact of obesity on their health status, exercise tolerance, systemic inflammation and comorbidity. Methods: A population-based sample of 3,797 subjects aged 40-80 years from the EPI-SCAN study was selected. Subjects were categorized according their body mass index (BMI) as underweight (,18.5 kg/m 2), normal weight (18.5-24.9 kg/m 2), overweight (25.0-29.9 kg/m 2) or obese (BMI$30.0 kg/m 2). Subjects were evaluated with post-bronchodilator spirometry and 6-minute walk tests. Smoking habits, respiratory symptoms, generic and specific quality of life, daily physical activities, comorbidities and systemic inflammatory biomarkers were recorded. Results: The prevalence of obesity or being overweight was higher in the 382 COPD patients than in the subjects without airflow limitation (29.4%, 95%CI 24.8-33.9% vs. 24.3, 95%CI 22.9-25.8; and 44.7%, 95%CI 39.7-49.6% vs. 43.0%, 95%CI 41.3-44.6, respectively; p = 0.020). In the COPD subgroup, obese subjects presented more dyspnea and less chronic cough, chronic bronchitis or chronic phlegm than normal-weight patients, as well as a worse health status. Moreover, reduced exercise tolerance and higher plasmatic C-reactive protein levels were found in the obese patients, who also presented a greater prevalence of cardiovascular disease (adjusted odds ratio 4.796, 95%CI 1.806-12.736, p = 0.002). Conclusions: In a population-based sample, obesity is more prevalent in COPD patients than in subjects without airflow limitation. Furthermore, obesity affects the clinical manifestations, quality of life and exercise tolerance of COPD patients, and it may contribute to a phenotype characterized by increased systemic inflammation and greater frequency of cardiovascular comorbidity.
2008 IEEE Wireless Communications and Networking Conference, 2008
The upcoming of new wireless technologies, many of them working within license-free frequencies, ... more The upcoming of new wireless technologies, many of them working within license-free frequencies, has opened the door to a relatively large number of scenarios, which break the legacy one-hop paradigm which characterizes most of tradi-tional network ...
Revista Española de Cardiología (English Edition), 2005
diac events during 6-month follow-up were recorded. Results. Of the 911 discharged patients, 45 (... more diac events during 6-month follow-up were recorded. Results. Of the 911 discharged patients, 45 (5.3%) were admitted during follow-up: 9 (1.1%) underwent revascularization, 5 (0.6%) had a myocardial infarction (MI), and 2 (0.2%) died from cardiovascular disease. Patients with a high TRS had a significantly higher risk of reaching the composite endpoint of death, MI, or revascularization (relative risk per unit of TRS increase, 3.63; 95% CI, 2.20-6.00; P<.001). Of the patients who were initially admitted, 22 (6.4%) underwent revascularization, 4 (1.2%) had an MI, and 14 died (4.1%) from cardiovascular disease during follow-up. The relative risk of the composite endpoint per unit of TRS increase was 1.72 (95% CI, 1.32-2.24; P<.001). Conclusions. The TIMI risk score is useful for stratifying cardiovascular event risk in non-selected patients with chest pain. The score can identify high-risk patients
Cardiac surgery with extracorporeal circulation in obstetric patients is a separate chapter becau... more Cardiac surgery with extracorporeal circulation in obstetric patients is a separate chapter because of the physiological changes brought about by pregnancy and factors such as anesthetic management, monitoring and perfusion during the cardiopulmonary bypass that affects both the mother and the child; both experience different circumstances and have dissimilar interests. The paper discusses the anesthetic management of a patient during her 26.2 weeks of gestation with a pulmonary thromboembolism and atrial intracavitary thrombus attached to the central catheter with atrial septal defect.
Wireless Communications and Mobile Computing, 2002
Despite the growing interest for LMDS systems there have been only a few commercial implementatio... more Despite the growing interest for LMDS systems there have been only a few commercial implementations until now especially outside of the U.S.A. The use of hierarchical structure through two‐layer networking has been even rarer. In many cases LMDS systems have strong advantages against their competitors to cover the last mile. In this article, we review and analyze the standards currently available and describe the European two‐layer trial system developed in 1996–2000. We show why further development towards IP based LMDS is useful in the future. Most of our recommendations are based on results derived from the European Union supported research project CABSINET. It had the aim of demonstrating the viability of a 40 GHz cellular digital television system with a return channel to offer interactive services. Two systems were tested: a line of sight link using QPSK, and a non‐line of sight with COFDM modulation scheme. In the RF‐subsystems, the greatest difficulty of any viable LMDS syst...
This study aimed to determine COPD prevalence in Spain and identify the level of undiagnosis and ... more This study aimed to determine COPD prevalence in Spain and identify the level of undiagnosis and the impact of undiagnosed COPD on health-related quality of life (HRQL) and activities of daily living (ADL). We surveyed a population-based sample of 4,274 adults aged 40 to 80 years. They were invited to answer a questionnaire and undergo pre-and post-bronchodilator spirometry. COPD was defined as a postbronchodilator FEV1/FVC ratio of <0.70. For 3,802 participants with good-quality postbronchodilator spirometry, the overall prevalence of COPD was 10.2% (95% confidence interval 9.2%-11.1%) and was higher in men (15.1%) than in women (5.6%). The prevalence of COPD stage II or higher was 4.4% (95%CI; 3.8%-5.1%). The prevalence of COPD increased with age and with cigarette smoking and was higher in low educational levels. A previous diagnosis of COPD was reported by 27% of COPD cases only. Diagnosed patients had more severe disease, higher cumulative smoking consumption and more severely impaired HRQL compared with undiagnosed subjects. However, even patients with undiagnosed COPD stage I+ already showed impairment in HRQL and in some aspects of ADL compared with participants without COPD. The prevalence of COPD in individuals between 40 and 80 years of age in Spain is 10.2% and increases with age, smoking consumption and lower educational levels. The rate of undiagnosis is very high and undiagnosed individuals with COPD already have a significant impairment in HRQL and ADL.
Improving efficiency of city services and facilitating a more sustainable development of cities a... more Improving efficiency of city services and facilitating a more sustainable development of cities are the main drivers of the smart city concept. Information and Communication Technologies (ICT) play a crucial role in making cities smarter, more accessible and more open. In this paper we present a novel architecture exploiting major concepts from the Future Internet (FI) paradigm addressing the challenges that need to be overcome when creating smarter cities. This architecture takes advantage of both the critical communications infrastructures already in place and owned by the utilities as well as of the infrastructure belonging to the city municipalities to accelerate efficient provision of existing and new city services. The paper highlights how FI technologies create the necessary glue and logic that allows the integration of current vertical and isolated city services into a holistic solution, which enables a huge forward leap for the efficiency and sustainability of our cities. Moreover, the paper describes a real-world prototype, that instantiates the aforementioned architecture, deployed in one of the parks of the city of Santander providing an autonomous public street lighting adaptation service. This prototype is a showcase on how added-value services can be seamlessly created on top of the proposed architecture.
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Papers by Luis Muñoz