Abstract The time series content information about the dynamic behavior of the system under study. This behavior could be complex, irregular and no lineal. For this reason, it is necessary to study new models that can solve this dynamic more satisfactorily. In this work a visual analysis of recurrence from time series of the coordinate’s variation ENU (East, North, Up) will be made. This analysis was obtained from nine continuous monitoring stations GPS (Global Navigation Satellite System); the intention is to study their behavior, they belong to the Equatorian GPS Network that materializes the reference system SIRGAS - ECUADOR. The presence of noise in the observations was reduced using digital low pass filters with Finite Impulse Response (FIR). For these series, the time delay was determined using the average mutual information, and for the minimum embedding dimension the False Nearest Neighbours (FNN) method was used; the purpose is to obtain the recurrent maps of each coordinates. The results of visual analysis show a strong tendency, especially in the East and North coordinates, while the Up coordinates indicate discontinued, symmetric and periodic behavior.

Resumen Las series temporales contienen información acerca del comportamiento dinámico de un determinado sistema. Este comportamiento puede presentarse como complejo, irregular y no lineal. Por esta razón es necesario que se realicen estudios con nuevos modelos que satisfagan de mejor manera sus resultados. En este trabajo se hace un análisis en forma visual sobre la recurrencia de la variación de las coordenadas ENU (Este, Norte, Up-arriba) a partir de las series temporales obtenidas de las estaciones de monitoreo continuo GPS con la intención de ver que estructura dinámica presentan esta series. Para lo cual, fue reducido el ruido existente en las series usando filtros pasa-bajo con FIR (Finite Impulse Response). Con la finalidad de construir los mapas recurrentes de las coordenadas ENU fueron calculados el tiempo de retardo mediante el uso de la técnica ami (average mutual information), y la dimensión embebida usando el método de los falsos vecinos más cercanos (False Nearest Neighbours-FNN). Los resultados del análisis visual muestran que las coordenadas Este y Norte tienen una fuerte tendencia, mientras que la coordenada Up (arriba) indica la presencia de discontinuidades, además de un comportamiento simétrico y periódico.

In a chemical analysis of the red seaweed Plocamium cartilagineum collected in Antarctic Peninsula, four polyhalogenated monoterpenes were isolated. Their structures were established by spectroscopic techniques. Two of them are acyclic monoterpenes and the others are cyclic. We report the antimicrobial, insecticide and acaricide activities of compounds.

Introduction: The implantable cardiac devices like regular pacemaker, cardiac resynchronization therapy (CRT) automatic implantable defibrillators (ICD) and CRT associate with ICD (CRT-D) are now being used frequently. Patient visits to pacemaker and ICD clinics for review and monitoring, has increases significantly. We present the experience of monitoring via satellite of patients with implantable cardiac devices in Mexico. Methods: Eighteen patients were selected from the arrhythmia Service Cardiac Electrophysiology and Stimulation of High Specialty Medical Unit (UMAE) of Specialties Hospital Dr. Antonio Fraga Mouret. National Medical Center (NMC) La Raza Mexican Social Security Institute (IMSS), who had a device (CRT, ICD y CRT-D) that is able to send information through the BIOTRONIK Home Monitoring system, from March 2006, to March 2009. Results: We obtained 4,980 transmissions as reports and 149 alerts recorded events, of which 50 were in ventricular fibrillation, 14 in ventricular tachycardia, frequent ventricular extra systoles exceeded by the range allowed in one hour were 25, electrograms default 26; and atrial fibrillation at 11. Conclusions: The monitoring system via satellite is reliable and useful diagnostic tool, which permits early detection, opportune treatment and effective monitoring of implantable cardiac devices.

Introducción: Actualmente, el monitoreo de algunos dispositivos cardiacos implantables como los marcapasos y el desfibrilador automático, así como la terapia de resincronización cardiaca asociada con desfibrilador automático implantable, son los que se utilizan con mayor frecuencia y el seguimiento de los mismos se puede llevar a cabo por vía satelital; por ello su revisión y monitoreo ha incrementado las visitas presenciales en las clínicas de marcapasos y desfibriladores. A continuación se informa la experiencia de la monitorización vía satélite de dichos dispositivos en un centro hospitalario de tercer nivel. Métodos: Se seleccionaron 18 pacientes de la Clínica de Marcapasos del Servicio de Electro-fisiología y Estimulación Cardiaca de la Unidad Médica de Alta Especialidad del Hospital de Especialidades Dr. Antonio Fraga Mouret, Centro Médico Nacional La Raza del Instituto Mexicano del Seguro Social a los cuales se les había implantado un desfibrilador o resincronizador con capacidad de vigilancia remota vía satélite (Home Monitoring BIOTRONIK, Alemania), de marzo del 2006 a marzo del 2009. Resultados: Como reportes, se obtuvieron 4980 transmisiones y 149 alertas por sucesos registrados, de los cuales 50 fueron de fibrilación ventricular, 14 de taquicardia ventricular, extrasístoles ventriculares frecuentes superadas por el rango permitido en una hora fueron 25, fibrilación auricular en 11. Conclusión: El sistema de vigilancia remota vía satélite es una herramienta de diagnóstico confiable, que permite una detección temprana de las principales arritmias que ocurren en los sujetos con dispositivos cardiacos implantables.

Background: There is an association between periodontal diseases and preterm delivery. Aim: To assess the relationship between periodontal diseases, ascending bacterial infection and placental pathology with preterm delivery. Patients and methods: A periodontal examination and collection of amniotic Huid and subgingival plaque samples were performed in women with preterm labor with intact membranes, without an evident clinical cause or preterm premature rupture of membranes, without clinical chorioamnionitis or labor and a gestational age between 24 and 34 weeks. Microbial invasión ofthe amniotic cavity was defined as the presence of a positive amniotic Buid culture. Cervicovaginal infection was defined as a bacteríal vaginosis orpositive culture ofcervix or vagina with a high neutrophil count. Ascending bacterial infection was diagnosed as the microbial invasión of the amniotic cavity by ascending bacteria or cervicovaginal infection. Corioamnionitis, funisitis or vellositis were diagnosed. Resulte: Fifty-nine women were included: forty-two with preterm labor with intact membranes and seventeen with preterm premature rupture of membranes. The prevalence of periodontal diseases was 93.2%. Microbial invasión of the amniotic Buid was detected in 27.1% of patients. periodontal pathogenic bacteria were isolated in 18.6% of amniotic Buid samples and 71.2% of subgingival plaque samples. The prevalence of ascending bacterial infection was 83.1% and in 72.9% of women it was associated with periodontal disease. Preterm delivery (<37 weeks) occurred in 64.4% of patients and was significantly associated with generalized periodontal disease and with the association of ascending bacterial infection and periodontal diseases. Patients with preterm delivery and generalized periodontal disease had a higher frequency of chorioamnionitis and funisitis. Conclusions: Generalized periodontal disease and its association with ascending bacterial infection are related to preterm delivery and placental markers of bacteríal ascending infection.