Fitoplancton de dos lagunas de los humedalesde Xeresa y Xeraco (Valencia, España).

VILLENA, M. J. & ROMO, S. 2001. Fitoplancton de dos lagunas de los humedales de Xeresa y Xeraco (Valencia, España). Bot. Complutensis 25: 179-189. Se ha estudiado la composición fitoplanctónica de dos lagunas costeras mediterráneas, que corresponden a los marjales de Xeresa y Xeraco (Valencia). Estas zonas húmedas de la Comunidad Valenciana poseen un importante valor ecológico y botánico para nuestra Península, aunque actualmente se encuentran amenazadas por transformaciones de tipo turístico o agrícola. Las lagunas estudiadas se caracterizan por ser someras (Zmax: 3 m), oligohalinas, de aguas transparentes y mesotróficas, y por encontrarse sobre lechos de turba y con praderas de macrófitos sumergidos. El fitoplancton observado destaca por presentar una composición similar para ambas lagunas, con especies cosmopolitas y abundancia de microalgales de pequeño tamaño. Esta estructura de tamaño resulta importante para mantener las complejas redes tróficas de estos lagos someros. El grupo algal más diverso, en ambas lagunas, fue el de las clorofíceas. Sin embargo, la abundancia y biomasa algal fue acaparada por las cianofíceas filamentosas en la laguna de Xeresa, mientras que las clorofíceas y criptofíceas dominaron en la laguna de Cap de Terme.VILLENA, M. J. & ROMO, S. 2001. Phytoplankton from two lakes of Xeresa and Xeraco wetlands (Valencia, Spain). Bot. Complutensis 25: 179-189. Phytoplankton composition from two Mediterranean Coastal lakes located in Xeresa and Xeraco wetlands (Valencia, Spain) were studied. These wetlands from the Comunidad Valenciana have an important ecological and botanical value for the Iberian Peninsula, although nowadays they are threatened by turistic and agriculture development. The study lakes are characterized to be shallow (Zmax: 3 m), oligohaline, water transparent, mesotrophic and peat lakes, which are covered by sumerged macrophytes. The phytoplankton observed was similar in both lakes, with cosmopolitan species and abundant small-size microalgae. This size structure is relevant for the maintenance of the complex food-webs of these shallow la 179 M. J. Villena & S. Romo Fitoplancton de dos lagunas de los humedales de Xeresa... kes. The most diverse algal group, in both study lakes, corresponded to chlorophytes. However, the algal abundance and biomasa was overwhelmed by cyanophytes in the lake of Xeresa, but by chlorophytes and cryptophytes in the lake of Cap de Terme

Evolución intercensal de las explotaciones agrarias (1962-1972-1982)

Los cambios intercensales en la estructura de las explotaciones agrarios durante los decenios 1962-72-82 son estudiados tratando, no solo de describir las principales alterociones detectadas, sino también de apuntar hipótesis interpretativas sobre su influencia en la evolución de la productividad global, agregado del sector agrorio. Con este fin se analiza la evolución, por tamaños de superficie de las explotaciones, agregadas a nivel estatal, del número y superficie de las explotaciones, parcelación Y fomas de riego. Entre las conclusiones cabe destacar, por su influencia en la productividod, la tendencia hocía explotaciones medianas con un menor número de parcelas de mayor extensión. La desaparición de pequeños explotaciones y la estabilización, en número, de las grandes. La puesto en regodio de nuevas tierras, notoblemete desacelerada desde 1972, va acompañada de una conncentración de esta superficie altamente productiva.Publicad

Performance of Scheduling Policies in Adversarial Networks with Non-synchronized Clocks

In this paper we generalize the Continuous Adversarial Queuing Theory (CAQT) model (Blesa et al. in MFCS, Lecture Notes in Computer Science, vol. 3618, pp. 144–155, 2005) by considering the possibility that the router clocks in the network are not synchronized. We name the new model Non Synchronized CAQT (NSCAQT). Clearly, this new extension to the model only affects those scheduling policies that use some form of timing. In a first approach we consider the case in which although not synchronized, all clocks run at the same speed, maintaining constant differences. In this case we show that all universally stable policies in CAQT that use the injection time and the remaining path to schedule packets remain universally stable. These policies include, for instance, Shortest in System (SIS) and Longest in System (LIS). Then, we study the case in which clock differences can vary over time, but the maximum difference is bounded. In this model we show the universal stability of two families of policies related to SIS and LIS respectively (the priority of a packet in these policies depends on the arrival time and a function of the path traversed). The bounds we obtain in this case depend on the maximum difference between clocks. This is a necessary requirement, since we also show that LIS is not universally stable in systems without bounded clock difference. We then present a new policy that we call Longest in Queues (LIQ), which gives priority to the packet that has been waiting the longest in edge queues. This policy is universally stable and, if clocks maintain constant differences, the bounds we prove do not depend on them. To finish, we provide with simulation results that compare the behavior of some of these policies in a network with stochastic injection of packets

Risk profiles and one-year outcomes of patients with newly diagnosed atrial fibrillation in India: Insights from the GARFIELD-AF Registry.

BACKGROUND: The Global Anticoagulant Registry in the FIELD-Atrial Fibrillation (GARFIELD-AF) is an ongoing prospective noninterventional registry, which is providing important information on the baseline characteristics, treatment patterns, and 1-year outcomes in patients with newly diagnosed non-valvular atrial fibrillation (NVAF). This report describes data from Indian patients recruited in this registry. METHODS AND RESULTS: A total of 52,014 patients with newly diagnosed AF were enrolled globally; of these, 1388 patients were recruited from 26 sites within India (2012-2016). In India, the mean age was 65.8 years at diagnosis of NVAF. Hypertension was the most prevalent risk factor for AF, present in 68.5% of patients from India and in 76.3% of patients globally (P < 0.001). Diabetes and coronary artery disease (CAD) were prevalent in 36.2% and 28.1% of patients as compared with global prevalence of 22.2% and 21.6%, respectively (P < 0.001 for both). Antiplatelet therapy was the most common antithrombotic treatment in India. With increasing stroke risk, however, patients were more likely to receive oral anticoagulant therapy [mainly vitamin K antagonist (VKA)], but average international normalized ratio (INR) was lower among Indian patients [median INR value 1.6 (interquartile range {IQR}: 1.3-2.3) versus 2.3 (IQR 1.8-2.8) (P < 0.001)]. Compared with other countries, patients from India had markedly higher rates of all-cause mortality [7.68 per 100 person-years (95% confidence interval 6.32-9.35) vs 4.34 (4.16-4.53), P < 0.0001], while rates of stroke/systemic embolism and major bleeding were lower after 1 year of follow-up. CONCLUSION: Compared to previously published registries from India, the GARFIELD-AF registry describes clinical profiles and outcomes in Indian patients with AF of a different etiology. The registry data show that compared to the rest of the world, Indian AF patients are younger in age and have more diabetes and CAD. Patients with a higher stroke risk are more likely to receive anticoagulation therapy with VKA but are underdosed compared with the global average in the GARFIELD-AF. CLINICAL TRIAL REGISTRATION-URL: http://www.clinicaltrials.gov. Unique identifier: NCT01090362

Nuevos enfoques en óptica de Fourier

no abstract

New focus on Fourier optics techniques

We present a short overview on the application of fractional cyclic and linear canonical transformations to optical signal processing and dedicate some of the discussions to the particular features found in the fractional Fourier transform domain

Focus on Fourier optics techniques

We present a short overview on the application of fractional cyclic and linear canonical transformations to optical signal processing and dedicate some of the discussions to the particular features found in the fractional Fourier transform domain

Matrix methods in geometric, wave, and statistical optics

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