2,471 research outputs found
High density cluster jet target for storage ring experiments
The design and performance of a newly developed cluster jet target
installation for hadron physics experiments are presented which, for the first
time, is able to generate a hydrogen cluster jet beam with a target thickness
of above at a distance of two metres behind the
cluster jet nozzle. The properties of the cluster beam and of individual
clusters themselves are studied at this installation. Special emphasis is
placed on measurements of the target beam density as a function of the relevant
parameters as well as on the cluster beam profiles. By means of a
time-of-flight setup, measurements of the velocity of single clusters and
velocity distributions were possible. The complete installation, which meets
the requirements of future internal fixed target experiments at storage rings,
and the results of the systematic studies on hydrogen cluster jets are
presented and discussed.Comment: 10 pages, 18 figure
Near-Threshold eta Meson Production in Proton-Proton Collisions
The production of eta mesons has been measured in the proton-proton
interaction close to the reaction threshold using the COSY-11 internal facility
at the cooler synchrotron COSY. Total cross sections were determined for eight
different excess energies in the range from 0.5 MeV to 5.4 MeV. The energy
dependence of the total cross section is well described by the available
phase-space volume weighted by FSI factors for the proton-proton and proton-eta
pairs.Comment: 9 pages, 1 table, 5 figure
The Backgrounds Data Center
The Strategic Defense Initiative Organization has created data centers for midcourse, plumes, and backgrounds phenomenologies. The Backgrounds Data Center (BDC) has been designated as the prime archive for data collected by SDIO programs. The BDC maintains a Summary Catalog that contains 'metadata,' that is, information about data, such as when the data were obtained, what the spectral range of the data is, and what region of the Earth or sky was observed. Queries to this catalog result in a listing of all data sets (from all experiments in the Summary Catalog) that satisfy the specified criteria. Thus, the user can identify different experiments that made similar observations and order them from the BDC for analysis. On-site users can use the Science Analysis Facility (SAFE for this purpose. For some programs, the BDC maintains a Program Catalog, which can classify data in as many ways as desired (rather than just by position, time, and spectral range as in the Summary Catalog). For example, data sets could be tagged with such diverse parameters as solar illumination angle, signal level, or the value of a particular spectral ratio, as long as these quantities can be read from the digital record or calculated from it by the ingest program. All unclassified catalogs and unclassified data will be remotely accessible
A refined taxonomy of behaviour change techniques to help people change their physical activity and healthy eating behaviours: The CALO-RE taxonomy
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Some constructions of almost para-hyperhermitian structures on manifolds and tangent bundles
In this paper we give some examples of almost para-hyperhermitian structures
on the tangent bundle of an almost product manifold, on the product manifold
, where is a manifold endowed with a mixed 3-structure
and on the circle bundle over a manifold with a mixed 3-structure.Comment: 10 pages; This paper has been presented in the "4th German-Romanian
Seminar on Geometry" Dortmund, Germany, 15-18 July 200
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Which primary care practitioners have poor human papillomavirus (HPV) knowledge? A step towards informing the development of professional education initiatives
Background: Primary care practitioners (PCP) play key roles in cervical cancer prevention. Human papillomavirus (HPV) knowledge is an important influence on PCPs’ cervical cancer prevention-related behaviours. We investigated HPV knowledge, and associated factors, among general practitioners (GPs) and practice nurses.
Methods: A survey, including factual questions about HPV infection and vaccination, was mailed to GPs and practice nurses in Ireland. Multivariable logistic regression was used to determine which PCPs had low knowledge (questions correctly answered: infection ≤5/11; vaccination: ≤4/10). Questions least often answered correctly were identified.
Results: 697 PCPs participated. For HPV infection, GPs and practice nurses answered a median of nine and seven questions correctly, respectively (p⅓ of PCPs.
Conclusions: There are important limitations in HPV infection and vaccination knowledge among PCPs. By identifying factors associated with poor knowledge, and areas of particular uncertainty, these results can inform development of professional education initiatives thereby ensuring women have access to uniformly high-quality HPV-related information and advice
Observation of nano-indent induced strain fields and dislocation generation in silicon wafers using micro-raman spectroscopy and white beam x-ray topography
In the semiconductor manufacturing industry, wafer handling introduces micro-cracks at the wafer edge. During heat treatment these can produce larger, long-range cracks in the wafer which can cause wafer breakage during manufacture. Two complimentary techniques, micro-Raman spectroscopy (μRS) and White Beam Synchrotron X-ray Topography (WBSXRT) were employed to study both the micro-cracks and the associated strain fields produced by nano-indentations in Si wafers, which were used as a means of introducing controlled strain in the wafers. It is shown that both the spatial lateral and depth distribution of these long range strain fields are relatively isotropic in nature. The Raman spectra suggest the presence of a region under tensile strain beneath the indents, which can indicate a crack beneath the indent and the data strongly suggests that there exists a minimum critical applied load below which cracking will not initiate
Drift chamber with a c-shaped frame
We present the construction of a planar drift chamber with wires stretched
between two arms of a c-shaped aluminium frame. The special shape of the frame
allows to extendthe momentum acceptance of the COSY-11 detection system towards
lower momenta without suppressing the high momentum particles. The proposed
design allows for construction of tracking detectors covering small angles with
respect to the beam, which can be installed and removed without dismounting the
beam-pipe. For a three-dimensional track reconstruction a computer code was
developed using a simple algorithm of hit preselection.Comment: submitted to Nucl. Instr. & Meth
A randomized controlled multimodal behavioral intervention trial for improving antiepileptic drug adherence
Purpose: Medication nonadherence is one of the most important reasons for treatment failure in patients with
epilepsy. The present study investigated the effectiveness of a multicomponent intervention to improve adherence
to antiepileptic drug (AED) medication in patients with epilepsy.
Methods: In a prospective, randomizedmulticenter trial, three sessions of face-to-facemotivational interviewing
(MI) in combination with complementary behavior change techniques were compared with standard care.Motivational
interviewing prompted change talk and self-motivated statements from the patients, planning their
own medication intake regimen and also identifying and overcoming barriers thatmay prevent adherence. Participants
were provided with calendars to self-monitor their medication taking behavior. A family member and
the health-care teamwere invited to attend the last session ofMI in order to improve the collaboration and communication
between patients, their caregiver or family member, and their health-care provider. At baseline and
6-month follow-up, psychosocial variables and medical adherence were assessed.
Results: In total, 275 participantswere included in the study. Comparedwith the active control group, patients in
the intervention group reported significantly highermedication adherence, aswell as stronger intention and perceptions
of control for taking medication regularly. The intervention group also reported higher levels of action
planning, coping planning, self-monitoring, and lower medication concerns.
Conclusions: This study shows that MI can be effective in clinical practice to improvemedication adherence in patientswith
epilepsy. It also provides evidence that combining volitional interventions, including action planning,
coping planning, and self-monitoring withmotivational interviewing can promote the effectiveness of the medical
treatments for epilepsy by improving adherenc
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