7,473 research outputs found
Addressing the Multi-Channel Inverse Problem at High Energy Colliders: A Model Independent Approach to the Search for New Physics with Trileptons
We describe a method for interpreting trilepton searches at high energy
colliders in a model-independent fashion and apply it to the recent searches at
the Tevatron. The key step is to recognize that the trilepton signature is
comprised of four experimentally very different channels defined by the number
of tau-leptons in the trilepton state. Contributions from these multiple
channels to the overall experimental sensitivity (cross section times branching
ratio) are model-independent and can be parametrized in terms of relevant new
particle masses. Given the trileptonic branching ratios of a specific model,
these experimentally obtained multichannel sensitivities can be combined to
obtain a cross section measurement that can be used to confront the model with
data. Our model-independent results are more widely applicable than the current
Tevatron trilepton results which are stated exclusively in terms of mSUGRA
parameters of supersymmetry. The technique presented here can be expanded
beyond trilepton searches to the more general "inverse problem" of
experimentally discriminating between competing models that seek to explain new
physics discovered in multiple channels.Comment: 17 pages, 7 figures Changed content cosmetic changes for submission
to JHE
Development of a low cost screen to identify hearing loss in young children and appropriate services for deaf children in Binga, Zimbabwe
There is a high prevalence of hearing loss estimated between 8 and 16% in young
children in rural areas in Zimbabwe. Deaf children are usually identified late and do
not benefit from early interventions. This study was conducted to evaluate a
questionnaire screen in identifying permanent hearing loss in excess of 50dBHL of
the better ear, compared with the pure-tone audiometric screen, in children aged 36-72
months living in Binga district, Zimbabwe. Subjects were recruited into the study by
using two questions which identified 417 at-risk children who were registered as
"Failing" children. In addition, 417 children were recruited as controls who were
matched by age and sex and were registered as "Following" children (n=834). The
"Questionnaire" screen used for this study had two parts; "Part I" had 8 general
questions for every child, while "Part 2" had 3 age specific sections (A, B and C) with
a set of 10 questions in each section and took between 20-25 minutes to administer for
each child. The screen was administered on 747 (90%) children of the original sample
(n=834) by four trained Tonga fluent interviewers, 87 children (10%) having dropped
out. An experienced audiologist administered the gold standard pure-tone audiometry
screen on the same 747 (90%) children who were "Questionnaire" screened. There
were four test sound frequencies used: 0.5k, lk, 2k and 4k set at a flat cut-off point of
50dBHL generated by a calibrated Kamplex screening audiometer. The pure-tone
screen administration required 10 - 15 minutes per child. Pass or fail results were
plotted on the audiogram. For reliability testing of both the "Questionnaire" and the
pure-tone screens, repeats were administered on 131 and 110 children respectively
who were randomly selected from 747 children. Children with marked physical
malforination, neurological problems and those for whom Tonga was not their first
language were excluded from the study. The results revealed that the "Questionnaire"
screen had a sensitivity of 79% and specificity of 96%. It was inter-and intra-user
reliable (r---0.89) in identifying permanent hearing loss in children aged 36-72 months
(p>0.05). The "Questionnaire" was easy to use and found to be a low-cost screen that
can be appropriately adapted and used in service delivery or research programmes in
different cultural settings in developing countries
A Note on the Linear Flow of a Viscous Incompressible Conducting Fluid Past an Infinite Flat Plate with Constant Suction in the Presence of a Transverse Magnetic Field
Analytical solution has been obtained for the momentum Equations of the linear flow of a viscous in compressible electrically conducting fluid past an infinite porous flat plate in the presence of a transverse magnetic field when the suction velocity normal to the plate is constant. It is observed that the velocity in the boundary layer increases with the increase of the intensity of the magnetic field
Comment on: `Pipe Network Model for Scaling of Dynamic Interfaces in Porous Media'
We argue that a proposed exponent identity [Phys. Rev. Lett 85, 1238 (2000)]
for interface roughening in spontaneous imbibition is wrong. It rests on the
assumption that the fluctuations are controlled by a single time scale, but
liquid conservation imposes two distinct time scales.Comment: 1 page, to appear in Phys. Rev. Let
Analysis of design strategies for mitigating the consequences of lithium fire within containment of controlled thermonuclear reactors
Originally presented as the first author's thesis, (M.S.)--in the M.I.T. Dept. of Nuclear Engineering, 1978Includes bibliographical references (pages 117-121)Report issued under U.S. Dept. of Energy EY-76-02-243
Vibrio ponticus, a new pathogen of cultured cobia
Most of the members of the family Vibrionaceae
are natural inhabitants of marine and estuarine
ecosystem and several of them are pathogens in
cultured aquatic organisms. Vibriosis caused by
some pathogenic Vibrio spp., can cause huge
mortality in marine fish culture systems.
Intermittent mortality with haemorrhagic lesions on
the fin, body surface, and head, exophthalmia
(Fig.1) and stopping of feeding activity were noticed
in cobia (25±5 cm length; 17±4 g weight) reared in
sea cages off Polem, Goa during June 2015. The
clinical signs lasted for a week with a total mortality
of 12%. Isolation of bacteria aseptically from liver
and kidney was done
Effect of Planned Early Recommended Ambulation Technique on Selected Post caesarean Biophysiological Health Parameters
Background: Caesarean section has been a part of
human culture since ancient times. It has been used
effectively throughout the 20th century and among the
major abdominal surgeries, it is the most common, oldest
worldwide surgery performed in obstetrics. Despite
the life saving advantages, there are several adverse
consequences of caesarean delivery for a woman and
to her household. The rate and risk of these complications
increases due to the increasing incidence mainly
in countries like India. The role of nurse midwife is to
act in the best interest of patient and newborn and make
the patient independent in carrying out the activities of
daily living as soon as possible. This can lead to a faster
recovery and shorter hospital stay. Also it can indirectly
help in reducing the complications associated with prolonged
bed rest and can improve the maternal newborn
bonding. Aim and Objectives: The present study
was done to evaluate the effect of planned early
ambulation on selected biophysiological health parameters
of post caesarean patients. Material and Methods:
The study included total 500 study subjects, 250
in experimental and 250 in control group. Quasi experimental
approach with multiple time series design
was adopted for the study. The experimental group was
given an early planned recommended ambulation technique
starting from the day of surgery. This consisted
of deep breathing exercise, cough exercise, leg exercise
and early mobilization. Over and above, the routine
general health care was given by the doctors and
nurses. The control group received only by routine general
care by doctors and nurses and mobilization on
third post operative day as per strategy adopted by the
hospital. The deep breathing exercises, coughing exercises
and leg exercises were not given routinely and
hence were not given to the control group. Post caesarean
biophysiological parameters chart was used to
assess the selected parameters for first five post operative
days. Result: The significant findings of the
study were that there was a significant difference in
the proportions of normal observations of selected
biophysiological health parameters like incisional pain,
condition of breast, condition of abdomen and peristaltic
movements of experimental group as compared to
that of control group. All these parameters improved
significant during first five post caesarean days at 0.05
level of significance. Thus the alternative hypothesis
was accepted and null hypothesis was rejected. From
the present study it could be concluded that the early
planned ambulation is an effective strategy for post
operative management of caesarean patient. It can help
in avoiding morbidity and can enhance the early recovery
of the patient
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