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Search Results: 1 - 10 of 226136 matches for " Sarah C. Bernal "
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The Influence of Sound Deprivation on Audiologic Outcomes after Cochlear Implantation  [PDF]
Maria Stella Arantes do Amaral, Ana Cláudia Mirandola Barbosa Reis, Henrique F. Pauna, Sarah C. Bernal, Eduardo T. Massuda, Miguel Angelo Hyppolito
International Journal of Clinical Medicine (IJCM) , 2018, DOI: 10.4236/ijcm.2018.91004
Abstract: The cochlear implant is a prosthesis that is capable to replace listening capability among patients with sensorineural hearing loss. Many studies suggest a negative relationship among duration of sound deprivation and audiometric gain (by means of speech perception test) after cochlear implantation. We evaluated surgical and audiologic results among post-lingual deafened adults, in different times of sound deprivation, and correlated with social isolation, presence of vertigo or tinnitus, and the speech therapy yield, between pre- and post-operative stages. A retrospective study was conducted on patients with post-lingual hearing loss, aged over 18 years old who underwent cochlear implant surgery in a public hospital from 2004 to 2014. Audiological, socio-demographic questionnaire, and manifestations of vertigo and tinnitus, during pre- and post-operative stages, were compared and correlating to the different periods of sound deprivation. Two groups were studied. The group A was composed of 38 participants (14 male and 24 female) with sound deprivation of less than 10 years; and group B was composed of 17 participants (8 male and 9 female) with sound deprivation longer than 10 years. We found no differences regarding age, sex, duration of sound deprivation, mean pure-tone audiometric results (pre- and post-surgery), and speech perception tests (pre-operatively). After one year of the surgery, we observed a significant difference between both groups, with a better performance to group A. The results of speech perception test, after cochlear implantation in group B, were worse than the results obtained in group A, although these correlations are not determinant whether to perform cochlear implant surgery or not.
A Better Understanding of Reasons for the Failure of the Healthcare Reform in Colombia  [PDF]
Oscar Bernal, Diana C. Zamora
Health (Health) , 2014, DOI: 10.4236/health.2014.621330
Abstract: The Colombian healthcare crisis is evidenced by obstacles to health service, diminished working conditions and medical autonomy, financial infeasibility, loss of leadership and legitimacy of the healthcare system. In the year 2013 twelve reform projects were presented to Congress, including a statutory law that defines health as a fundamental right which was approved and another ordinary one which sought a complete reform of the system but was rejected and criticized by different opinion leaders. For this study we have made an adaptation to Q methodology, which assigns quantitative values to the most frequent statement variables obtained from secondary sources (norms, articles, media, forums) giving objective information about the diverse positions in the proposals to healthcare reform. We analyzed from the most objective position and from academic independence the different views of the opinion leaders for a better understanding of the reasons for this failure in healthcare reform. There was a great polarization in the diverse statements which made an agreement with the government unlikely and, when added to a political moment in which the presidential election was being held, made the new reform non-viable. Although there is an agreement about the existence of a crisis, this has not been the case about the analysis of its causes or solutions. At the present time, the government is not presenting a new reform proposal and is focusing on some decree to create a model of healthcare in rural zones, define financial conditions for the EPSes (health providers), update norms for membership in a healthcare system and regulate biotechnological drugs. Even though to date there have been no opinions, plus taking into account the previous analysis, it is very possible there will be much criticism from those who demand a structural change in the system.
FUNCIONAMIENTO FAMILIAR, CONFLICTOS CON LOS PADRES Y SATISFACCIóN CON LA VIDA DE FAMILIA EN ADOLESCENTES BACHILLERES
Luna Bernal, Alejandro César
Acta Colombiana de Psicología , 2012,
Abstract: The objective of this study was to examine to what extent functioning of the family system can modulate the effect of conflicts with parents on the levels of family satisfaction of adolescents. The sample (N = 204) was composed of high-school students aged between 15 and 19 years. They responded the Spanish versions of the Family Conflict in Adolescence Scale (Parra & Oliva, 2002; Pérez & Aguilar, 2009), the Family Adaptability and Cohesion Evaluation Scale (FACES-20esp) (Martínez- Pampliega, Iraurgi, Galíndez & Sanz, 2006), and the Satisfaction with Family Life Scale (Luna, Laca & Mejía, 2011). A Multiple Regression analysis showed a significant contribution of Cohesion and Frequency of conflicts on family satisfaction. Based on this, a Univariate Variance Analysis identified that the effect of Frequency of Conflict on Family Satisfaction depends on the degree of family Cohesion. These and other results are discussed in the framework of the controversy present in the literature about the possible positive or negative effects of conflict between parents and children in adolescence.
GROWING MAGNETIC FIELDS IN CENTRAL COMPACT OBJECTS
C. G. Bernal,D. Page
Revista mexicana de astronomía y astrofísica , 2011,
Abstract: Estudiamos el efecto de un modelo de crecimiento del campo magnético en los llamados Objetos Compactos Centrales (OCCs). Tal evolución del campo magnético no es una idea nueva (Blandford, Applegate, & Hernquist 1983) pero sus implicaciones evolutivas no han sido estudiadas completamente (Michel 1994). Discutimos las nuevas clases de estrellas de neutrones, las cuales se presentan en cinco tipos reconocidos en los últimos diez a os. Comentamos la posibilidad de que un pulsar magnetizado, débilmente rotante, pueda haberse formado en SN1987A.
Hypercritical accretion phase and neutrino expectation in the evolution of Cassiopeia A
Nissim Fraija,C. Giovanny Bernal
Physics , 2015, DOI: 10.1093/mnras/stv1015
Abstract: Cassiopeia A the youngest supernova remnant known in the Milky Way is one of the brightest radio sources in the sky and a unique laboratory for supernova physics. Although its compact remnant was discovered in 1999 by the Chandra X-Ray Observatory, nowadays it is widely accepted that a neutron star lies in the center of this supernova remnant. In addition, new observations suggest that such neutron star with a low magnetic field and evidence of a carbon atmosphere could have suffered a hypercritical accretion phase seconds after the explosion. Considering this hypercritical accretion episode, we compute the neutrino cooling effect, the number of events and neutrino flavor ratios expected on Hyper-Kamiokande Experiment. The neutrino cooling effect (the emissivity and luminosity of neutrinos) is obtained through numerical simulations performed in a customized version of the FLASH code. Based on these simulations, we forecast that the number of events expected on the Hyper-Kamiokande Experiment is around 3195. Similarly, we estimate the neutrino flavor ratios to be detected considering the neutrino effective potential due to the thermal and magnetized plasma and thanks to the envelope of the star. It is worth noting that our estimates correspond to the only trustworthy method for verifying the hypercritical phase and although this episode took place 330 years ago, at present supernova remnants with these similarities might occur thus confirming our predictions for this phase.
Recycling Agave Bagasse of the Tequila Industry  [PDF]
C. G. I?iguez, C. J. J. Bernal, M. W. Ramírez, N. J. Villalvazo
Advances in Chemical Engineering and Science (ACES) , 2014, DOI: 10.4236/aces.2014.42016
Abstract:

This paper presents an overview of different handling systems and use of the agave bagasse. These systems have appeared from different research works always taking in account the environmental sustainability. It is mentioned that the agave bagasse can be used for animal feeding, for the elaboration of compound materials, as an element for agricultural and hydroponic vegetables cultivation purposes, and also as a means to treat biosolids, vinasses, and bagasses of slaughterhouses and tanneries.

DENV Inhibits Type I IFN Production in Infected Cells by Cleaving Human STING
Sebastian Aguirre,Ana M. Maestre,Sarah Pagni,Jenish R. Patel,Timothy Savage,Delia Gutman,Kevin Maringer,Dabeiba Bernal-Rubio,Reed S. Shabman,Viviana Simon,Juan R. Rodriguez-Madoz,Lubbertus C. F. Mulder,Glen N. Barber,Ana Fernandez-Sesma
PLOS Pathogens , 2012, DOI: 10.1371/journal.ppat.1002934
Abstract: Dengue virus (DENV) is a pathogen with a high impact on human health. It replicates in a wide range of cells involved in the immune response. To efficiently infect humans, DENV must evade or inhibit fundamental elements of the innate immune system, namely the type I interferon response. DENV circumvents the host immune response by expressing proteins that antagonize the cellular innate immunity. We have recently documented the inhibition of type I IFN production by the proteolytic activity of DENV NS2B3 protease complex in human monocyte derived dendritic cells (MDDCs). In the present report we identify the human adaptor molecule STING as a target of the NS2B3 protease complex. We characterize the mechanism of inhibition of type I IFN production in primary human MDDCs by this viral factor. Using different human and mouse primary cells lacking STING, we show enhanced DENV replication. Conversely, mutated versions of STING that cannot be cleaved by the DENV NS2B3 protease induced higher levels of type I IFN after infection with DENV. Additionally, we show that DENV NS2B3 is not able to degrade the mouse version of STING, a phenomenon that severely restricts the replication of DENV in mouse cells, suggesting that STING plays a key role in the inhibition of DENV infection and spread in mice.
Cartas y Salones: mujeres que leen y escriben la nación en la Sudamérica del siglo XIX
Sarah C. Chambers
Araucaria , 2005,
Abstract: Este ensayo se basa en la correspondencia de tres destacadas mujeres de principios del siglo diecinueve en la Sudamérica espa ola (Manuela Sáenz, Mariquita Sánchez de Thompson y Carmen Arriagada) para analizar sus ideas sobre la identidad nacional y el lugar de la mujer en las nuevas repúblicas. Sus cartas revelan que las redes de amistad influenciaron en su diverso grado de nacionalismo y les permitieron defender que las mujeres podían jugar un papel importante en la reconciliación nacional durante el periodo de lucha civil. Propongo que la nueva concepción de las naciones como comunidades imaginadas (Anderson, 1983) se enraíce en las interacciones sociales de estas -más peque as pero más tangibles- comunidades de escritores, conversadores y conspiradores políticos. Excluidas de la función pública, y por tanto inhabilitadas para seguir sus ambiciones personales, estas tres mujeres afirmaron que ponían la unidad nacional por encima de la política partidista. Aunque dicho argumento hacía imposible exigir los derechos de plena ciudadanía para las mujeres, fueron más allá del restrictivo rol de esposa y madre desprendida, que se estaba convirtiendo progresivamente en la idea oficial, para hacer de consejeras y mediadoras en el espacio político.
Analyzing Remote Sensing Data in R: The landsat Package
Sarah C. Goslee
Journal of Statistical Software , 2011,
Abstract: Research and development on atmospheric and topographic correction methods for multispectral satellite data such as Landsat images has far outpaced the availability of those methods in geographic information systems software. As Landsat and other data become more widely available, demand for these improved correction methods will increase. Open source R statistical software can help bridge the gap between research and implementation. Sophisticated spatial data routines are already available, and the ease of program development in R makes it straightforward to implement new correction algorithms and to assess the results. Collecting radiometric, atmospheric, and topographic correction routines into the landsat package will make them readily available for evaluation for particular applications.
Coalescence of Low-Viscosity Fluids in Air
Sarah C. Case
Physics , 2008, DOI: 10.1103/PhysRevE.79.026307
Abstract: An electrical method is used to study the early stages of coalescence of two low-viscosity drops. A drop of aqueous NaCl solution is suspended in air above a second drop of the same solution which is grown until the drops touch. At that point a rapidly widening bridge forms between them. By measuring the resistance and capacitance of the system during this coalescence event, one can obtain information about the time dependence of the characteristic bridge radius and its characteristic height. At early times, a new asymptotic regime is observed that is inconsistent with previous theoretical predictions. The measurements at several drop radii and approach velocities are consistent with a model in which the two liquids coalesce with a slightly deformed interface.
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