152 research outputs found
Proposal of a Donor Behavior Model Applied to Spanish Organizations for Development
NGOs need a thorough knowledge of the donordecision process in order to be successful in their strategies forraising awareness and fundraising. In this paper, we focus onparticular types of nonprofit organizations: those whose aimsare to contribute to the advancement of developing countriesand, specifically, those trying to raise awareness of theirsituation and obtain funds in Spain. The model we propose isthe result of the study of bibliography, the authors’experiences in the last 25 years in over 15 NGOs with differentlevels of responsibility, and a study conducted by Salvetti &Llombart for the Spanish Association of Fundraising,consisting of 1.437 on-line interviews with donors, high andlow potential donors, as well as non-donors. The interviewstook place in December 2010 to February 2011
Caracterización de la dehiscencia bilateral del conducto semicircular superior
In the superior canal dehiscence syndrome, patients can
have sound- or pressure-induced vertigo and oscillopsia.
They may also present conductive hearing loss or higher
than normal bone conduction thresholds. Clinical manifestations
are due to the effect of a third mobile window in the
inner ear created by the dehiscence. Diagnosis is based on
clinical manifestations, vertical and rotatory nystagmus induced
by sound and pressure reflecting SSC stimulation, reduced
threshold and increased amplitude of vestibular
evoked myogenic potentials (VEMP) and temporal bone CT
scan images showing the SSC dehiscence. Characteristic eye
movements can be recorded with the scleral search coil
technique
Vestibulo-Oculomotor Reflex Recording Using the Scleral Search Coil Technique. Review of Peripheral Vestibular Disorders
Our goal is to review vestibulo-oculomotor reflex (VOR) studies on several peripheral vestibular disorders (Ménière’s disease, vestibular neuritis, benign paroxysmal positional vertigo, superior canal dehiscence syndrome, and vestibular neuroma), using the scleral search coil (SSC) technique. Head movements are detected by vestibular receptors and the elicited VOR is responsible for compensatory 3 dimensional eye movements. Therefore, to study the VOR it is necessary to assess the direction and velocity of 3 dimensional head, and eye movements. This can be achieved using the SSC technique. Interaction between a scleral search coil and an alternating magnetic field generates an electrical signal that is proportional to eye position. Ideally, eye rotation axis is aligned with head rotation axis and VOR gain (eye velocity/head velocity) for horizontal and vertical head rotations is almost 1. The VOR gain, however, for torsional head rotations is smaller and about 0.
Dioctofimosis: presentación de un caso clínico
La dioctofimosis es una helmintiasis producida por el nemátode Dioctophyma renale (Goeze, 1782). Afecta a diversos mamíferos domésticos y silvestres, principalmente a los carnívoros. Este parásito se localiza principalmente en el riñón derecho, aunque puede tener otras localizaciones erráticas. El objetivo del presente trabajo es describir un caso de dioctofimosis renal y extra renal en un canino de la localidad de Recreo (Santa Fe, Argentina). El examen microscópico del sedimento urinario del paciente evidencio numerosos huevos D. renale. Mediante estudio ecográfico se confirmó la presencia de adultos en el riñón derecho como en cavidad abdominal. Se destaca la bondad que ofrece este método complementario en el diagnóstico de dioctofimosis renal como extra renal, ya que permitiría detectar la presencia de parásitos en aquellos animales con sedimento urinario negativo.Fil: Ruiz, Marcelo Fabián. Universidad Nacional del Litoral. Facultad de Cs.veterinarias. Departamento de Clinicas; ArgentinaFil: Zimmermann, R.N.. Universidad Nacional del Litoral. Facultad de Cs.veterinarias. Departamento de Clinicas; ArgentinaFil: Aguirre, Fabián Oscar. Universidad Nacional del Litoral. Facultad de Cs.veterinarias. Departamento de Clinicas; ArgentinaFil: Stassi, Antonela Florencia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Ciencias Veterinarias del Litoral. Universidad Nacional del Litoral. Facultad de Cs.veterinarias. Instituto de Ciencias Veterinarias del Litoral; ArgentinaFil: Forti, M.S.. Profesional Independiente. Especialista en Salud de loa Animales de Compañía.; Argentin
Resultados de los potenciales evocados miogénicos vestibulares en el vértigo posicional paroxístico benigno
Objective: Benign paroxysmal positional vertigo (BPPV)
seems to occur because of otoconia migration into the semicircular
canals or their adherence to the cupula. Although
the origin of these otoconia lies in the macula of the utricle,
vestibular evoked myogenic potentials (VEMPs) can be
used assess saccular function. The aim of this study is to assess
the saccular function in patients diagnosed with BPPV.
Patients and method: Nineteen patients diagnosed with
BPPV of the posterior semicircular canal were included in
this study. Their auditory function and their caloric, rotatory
chair, and VEMP responses were tested. Ipsilateral and
contralateral VEMP thresholds, ipsilateral and contralateral
p13 and n23 latencies at 100 dB, inter-peak amplitude and
the interaural amplitude difference were determined.
Results: We found a lack of VEMP response in 52 % of the
ears with BPPV. When adjusted for bilateral absence, VEMP
response was absent in 20.3 % of ears.
Conclusions: Some patients with idiopathic BPPV show a
degree of saccular dysfunction
Longitudinal Results With Intratympanic Dexamethasone in the Treatment of Ménière’s Disease
To assess patient satisfaction with vertigo control using
intratympanic (IT) dexamethasone (12 mg/mL) for medically refractory unilateral
Meniere's disease. STUDY DESIGN: Retrospective study. SETTING: Tertiary referral
neurotology clinic. PATIENTS: One hundred twenty-nine subjects diagnosed with
unilateral Meniere's disease still having vertigo despite medical therapy.
INTERVENTION: IT dexamethasone injections as needed to control vertigo attacks.
MAIN OUTCOME MEASURE: A Kaplan-Meier time-to-event method was used to determine
the rate of "survival," meaning sufficient satisfaction with vertigo control that
the subject did not wish to have subsequent ablative treatment. "Failure" was
defined as poor control and the choice to proceed to ablative treatment. RESULTS:
Acceptable vertigo control ("survival") was achieved in 117 (91%) of 129
subjects. Vertigo control required only one dexamethasone injection in 48 (37%),
2 injections in 26 (20%), 3 injections in 18 (14%), and 4 injections in 10 (8%).
More than 4 injections were needed in 15 subjects (21%). Of 12 failures (9%), 9
occurred within 6 months of the first IT dexamethasone injection. Follow-up data
for 2 years were available for 96 subjects. Of these, 87 (91%) had vertigo
control with IT dexamethasone, of whom 61 (70)% required no further injections
after 2 years, 23 (26%) continued to receive IT dexamethasone injections, and 3
(3%) chose IT gentamicin treatment. CONCLUSION: IT dexamethasone injection
therapy on an as-needed outpatient basis can provide vertigo control that is
satisfactory in patients with Meniere's disease. The Kaplan-Meier method
addresses the need for an outcome measure suited to repeated treatments and
variable lengths of follow-up. However, due to the retrospective nature of this
study, the presence of bias caused by loss of subjects from follow-up cannot be
ruled out
New Insights of High-precision Asteroseismology: Acoustic Radius and χ
Asteroseismology is a powerful tool for probing stellar interiors and determining stellar fundamental
parameters. In the present work, we adopt the χ2-minimization method but only use the observed high-precision seismic observations (i.e., oscillation frequencies) to constrain theoretical models for analyzing solar-like oscillator KIC 6225718. Finally, we find the acoustic radius τ0 is the only global parameter that can be accurately measured by the χ2-matching method between observed frequencies and theoretical model calculations for a pure p-mode oscillation star. We obtain
τ0=4601.5−8.3+4.4 seconds for KIC 6225718. It leads that the mass and radius of the CMMs are degenerate with each other. In addition, we find that the distribution range of acoustic radius is slightly enlarged by some extreme cases, which posses both a larger mass and a higher (or lower) metal abundance, at the lower acoustic radius end
Thin-shell wormholes with a generalized Chaplygin gas in Einstein-Born-Infeld theory
We construct spherically symmetric thin-shell wormholes supported by a
generalized Chaplygin gas in Born-Infeld electrodynamics coupled to Einstein
gravity, and we analyze their stability under radial perturbations. For
different values of the Born-Infeld parameter and the charge, we compare the
results with those obtained in a previous work for Maxwell electrodynamics. The
stability region in the parameter space reduces and then disappears as the
value of the Born-Infeld parameter is modified in the sense of a larger
departure from Maxwell theory.Comment: 9 pages, 6 figures; v2: improved versio
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