Accuracy of a teleported trapped field state inside a single bimodal cavity

We propose a simplified scheme to teleport a superposition of coherent states from one mode to another of the same bimodal lossy cavity. Based on current experimental capabilities, we present a calculation of the fidelity that can be achieved, demonstrating accurate teleportation if the mean photon number of each mode is at most 1.5. Our scheme applies as well for teleportation of coherent states from one mode of a cavity to another mode of a second cavity, both cavities embedded in a common reservoir.Comment: 4 pages, 2 figures, in appreciation for publication in Physical Review

Canais Iônicos na Epilepsia

Dados da Organização Mundial da Saúde apontaram uma prevalência mundial de epilepsia por volta de 50 milhões de pessoas. A crise epiléptica é um período de excitação síncrona anormal de uma população de neurônios. O balanço entre sistemas de controle que impedem uma descarga de potencial de ação excessiva nos neurônios e outros sistemas que facilitam a excitação mantém o bom funcionamento do sistema nervoso. Este trabalho teve como objetivo compilar informações sobre o envolvimento das canalopatias no processo fisiopatológico das crises epilépticas. Foi realizada uma revisão de literatura, através de pesquisas bibliográficas utilizando os bancos de dados Medline/PubMed, Scielo, Scirus, Wiley Online Library e Science Direct. Para tal finalidade, os descritores utilizados foram: epilepsia, crises epilépticas, canais iônicos, canalopatias e epidemiologia, em idiomas português e inglês. As investigações genéticas fizeram com que algumas síndromes epilépticas fossem consideradas canalopatias e, por conseguinte, aumentaram o entendimento da fisiopatologia dos transtonos convulsivos. Dada à incapacidade de cura dos fármacos disponíveis atualmente, o grande desafio para as pesquisas científicas é a descoberta de um tratamento capaz de prevenir ou reverter a epilepsia.Data from the World Health Organization indicated a worldwide prevalence of epilepsy of about 50 million people. An epileptic seizure is a period of abnormal synchronous excitation of a neuronal population. The balance between control systems that prevent neurons from an excessive action potential discharge and other systems that facilitate excitation maintains the proper functioning of the central nervous system. This study aimed to collect information on role of channelopathies in the pathophysiological processess of epileptic seizures, along with considerations about antiepileptic therapy targeting ion channels. We performed a bibliographic review, using the databases Medline/PubMed, Scielo, Scirus, Wiley Online Library and Science Direct. The keywors used were: epilepsy, epileptic seizures, ion channels, channelopathies, antiepileptic drugs and epidemiology, in both Portuguese and English. Some epileptic syndromes were considered channelopathies after genetic investigations and therefore increased the understanding of the pathophysiology convulsive disorders. Given the inability to cure with currently available antiepileptic drugs, the major challenge for scientific research is the discovery of a treatment capable of prevent or reverse epilepsy

Aortic Response to Strength Training and Spirulina platensis Dependent on Nitric Oxide and Antioxidants

Studies have shown that supplementation with Spirulina platensis improves vascular reactivity. However, it is unclear whether in association with strength training this effect can be enhanced. Thus, this study aimed to determine the effects of strength training and S. platensis on the reactivity of the aorta from Wistar rat and the possible mechanisms involved. The animals were supplemented with S. platensis and divided into sedentary (SG, SG50, SG150, and SG500) and trained groups (TG, TG50, TG150, and TG500). Nitrite, malondialdehyde (MDA) and antioxidant activity were determined by biochemical assays. To evaluate vascular response, cumulative concentration—response curves to phenylephrine (PHE) and acetylcholine (ACh) were constructed. L-NAME was used to assess the participation of nitric oxide (NO). It was observed that the PHE contractile potency was reduced in TG50, TG150, and TG500 groups compared to SG50, SG150, and SG500 groups, respectively. However, the presence of L-NAME increased the contractile response in all groups. Strength training potentiated the increase in relaxing activity induced by S. platensis, where the pCE50 values of ACh increased in TG150 and TG500. These responses were accompanied by increased nitrite production, MDA reduction and increased antioxidant activity in the aorta of both TG150 and TG500 groups. Thus, the present study demonstrated that combined with strength training, S. platensis potentiates vascular improvement through the participation of NO and reduction of oxidative stress

Vaccinia Virus Infection in Monkeys, Brazilian Amazon

To detect orthopoxvirus in the Brazilian Amazon, we conducted a serosurvey of 344 wild animals. Neutralizing antibodies against orthopoxvirus were detected by plaque-reduction neutralizing tests in 84 serum samples. Amplicons from 6 monkey samples were sequenced. These amplicons identified vaccinia virus genetically similar to strains from bovine vaccinia outbreaks in Brazil

Emancipatory practices of nurses in primary health care: the home visit as an instrument of health needs assessment

Objective Identify nurses’ emancipatory practices in primary care, to contribute to the improvement of health care. Method A case study type social research of qualitative nature, in which nurses of a primary health care service unit in São Paulo were interviewed. Results The home visit was identified as a nursing practice possible to be expanded in order to identify social determinants of health, triggering emancipatory practices in the service. This expansion occurred because the design of health care labour intended by the service team changed its focus from the traditional object of health services, the disease. Conclusion First, it is advocated that social policies lead projects with the purpose of improving health needs. On the other hand, the daily labour needs to provide opportunities for reflection and discussion of healthcare projects, leading workers to propose labour-processes targeted to both the social determinants of health and people’s illness

Search for eccentric black hole coalescences during the third observing run of LIGO and Virgo

Despite the growing number of confident binary black hole coalescences observed through gravitational waves so far, the astrophysical origin of these binaries remains uncertain. Orbital eccentricity is one of the clearest tracers of binary formation channels. Identifying binary eccentricity, however, remains challenging due to the limited availability of gravitational waveforms that include effects of eccentricity. Here, we present observational results for a waveform-independent search sensitive to eccentric black hole coalescences, covering the third observing run (O3) of the LIGO and Virgo detectors. We identified no new high-significance candidates beyond those that were already identified with searches focusing on quasi-circular binaries. We determine the sensitivity of our search to high-mass (total mass M>70 M⊙) binaries covering eccentricities up to 0.3 at 15 Hz orbital frequency, and use this to compare model predictions to search results. Assuming all detections are indeed quasi-circular, for our fiducial population model, we place an upper limit for the merger rate density of high-mass binaries with eccentricities 0<e≤0.3 at 0.33 Gpc−3 yr−1 at 90\% confidence level