2,652 research outputs found
Mechanical dynamic load of the LHC arc cryo-magnets during the installation
About 1700 LHC main superconducting dipoles and quadrupoles will have to be transported and handled between the assembly, the magnet measurements and the storage that precedes the final installation in the LHC tunnel. To ensure the required mechanic and geometric integrity of the cryo-magnets, transport specifications and allowed acceleration loads were defined after detailed dynamic analysis. A large number of cryo-magnets are now arriving at CERN on a regular basis. The logistics for the handling and transport are monitored with tri-axial acceleration monitoring devices that are installed on each cryo-magnet. Measurements are made to commission new equipment like overhead cranes, tunnel transport and handling devices to guarantee that the defined acceleration limits are respected. The results from the acceleration monitoring that are stored in the same quality assurance system as the cryo-magnets allowed to give a first idea of the level of the mechanical dynamic load on each magnet throughout the logistics chain and were used to detect details such as out-of-specification accelerations that needed improvement
Impact of passive and active promotional strategies on patient acceptance of medication therapy management services
Objectives
To assess the impact of passive and active promotional strategies on patient acceptance of medication therapy management (MTM) services, and to identify reasons for patient acceptance or refusal.
Methods
Four promotional approaches were developed to offer MTM services to eligible patients, including letters and bag stuffers (“passive” approaches), and face-to-face offers and telephone calls (“active” approaches). Thirty pharmacies in a grocery store chain were randomized to one of the four approaches. Patient acceptance rates were compared among the four groups, and between active and passive approaches using hierarchical logistic regression techniques. Depending on their decision to accept or decline the service, patients were invited to take part in one of two brief telephone surveys.
Results
No significant differences were identified among the four promotional methods or between active and passive methods in the analyses. Patients’ most frequent reasons for accepting MTM services were potential cost savings, review of how the medications were working, the expert opinion of the pharmacist, and education about medications. Patients’ most frequent reasons for declining MTM services were that the participant already felt comfortable with their medications and felt their pharmacist provides these services on a regular basis.
Conclusion
No significant difference was found among any of the four groups or between active or passive approaches. Further research is warranted to identify strategies for improving patient engagement in MTM services
Bubble Growth as a Detonation
Bubble growth as a detonation is studied in the context of cosmological phase
transitions. It is proved that the so called Chapman-Jouguet hypothesis, which
restricts the types of detonations that can occur in spherically symmetric
chemical burning, does not hold in the case of phase transitions. Therefore a
much larger class of detonation solutions exists in phase transitions than in
chemical burning.Comment: 15 LaTeX-pages with 5 ps-figures appended at the end, preprint
HU-TFT-93-4
Cluster Production in Quark-Hadron Phase Transition
The problem of cluster formation and growth in first-order quark-hadron phase
transition in heavy-ion collisions is considered. Behaving as Brownian
particles, the clusters carry out random walks and can encounter one another,
leading to coalescence and breakup. A simulation of the process in cellular
automaton suggests the possibility of a scaling distribution in the cluster
sizes. The experimental determination of the cluster-size distribution is urged
as a means to find a clear signature of phase transition.Comment: 12 pages + 1 figure. Report # OITS-517. To be published in Phys. Rev.
Lett. 71, xxx (1994
Interface Tension in Quenched QCD
We calculate the tension of the interface between the confined and
deconfined phases by the histogram method in SU(3) lattice gauge theory for
temporal extents of 4 and 6 using the recent high-statistics data by QCDPAX
collaboration. The results are and 0.0218(33) for
and 6, respectively. The ratio shows a scaling violation
similar to that already observed for the latent heat \latent. However, we
find that the physically interesting dimensionless combinations
(\sigma^{3}/\latent^2 T)^{1/2} and \sigma T/ \latent scale within the
statistical errors.Comment: 13 pages with 2 PostScript figures, LaTeX, CERN-TH.6798/93,
AZPH-TH/93-04, UTHEP-25
Does increased interdisciplinary contact among hard and social scientists help or hinder interdisciplinary research?
Scientists across disciplines must often work together to address pressing global issues facing our societies. For interdisciplinary projects to flourish, scientists must recognise the potential contribution of other disciplines in answering key research questions. Recent research suggested that social sciences may be appreciated less than hard sciences overall. Building on the extensive evidence of ingroup bias and ethnocentrism in intergroup relations, however, one could also expect scientists, especially those belonging to high status disciplines, to play down the contributions of other disciplines to important research questions. The focus of the present research was to investigate how hard and social scientists perceive one another and the impact of interdisciplinary collaborations on these perceptions. We surveyed 280 scientists at Wave 1 and with 129 of them followed up at Wave 2 to establish how ongoing interdisciplinary collaborations underpinned perceptions of other disciplines. Based on Wave 1 data, scientists who report having interdisciplinary experiences more frequently are also more likely to recognise the intellectual contribution of other disciplines and perceive more commonalities with them. However, in line with the intergroup bias literature, group membership in the more prestigious hard sciences is related to a stronger tendency to downplay the intellectual contribution of social science disciplines compared to other hard science disciplines. This bias was not present among social scientists who produced very similar evaluation of contribution of hard and social science disciplines. Finally, using both waves of the survey, the social network comparison of discipline pairs shows that asymmetries in the evaluation of other disciplines are only present among discipline pairs that do not have any experience of collaborating with one another. These results point to the need for policies that incentivise new collaborations between hard and social scientists and foster interdisciplinary contact
A standardisation proof for algebraic pattern calculi
This work gives some insights and results on standardisation for call-by-name
pattern calculi. More precisely, we define standard reductions for a pattern
calculus with constructor-based data terms and patterns. This notion is based
on reduction steps that are needed to match an argument with respect to a given
pattern. We prove the Standardisation Theorem by using the technique developed
by Takahashi and Crary for lambda-calculus. The proof is based on the fact that
any development can be specified as a sequence of head steps followed by
internal reductions, i.e. reductions in which no head steps are involved.Comment: In Proceedings HOR 2010, arXiv:1102.346
Beta reduction constraints
The constraint language for lambda structures (CLLS) can model lambda terms that are known only partially. In this paper, we introduce beta reduction constraints to describe beta reduction steps between partially known lambda terms. We show that beta reduction constraints can be expressed in an extension of CLLS by group parallelism. We then extend a known semi-decision procedure for CLLS to also deal with group parallelism and thus with beta-reduction constraints
Diversity in perception and management of farming risks in southern Mali
A deeper understanding of how smallholder farmers perceive and manage risks is crucial to identify options that
increase farmers' adaptive capacity. We investigated a broad range of risks that play a role in farmers' decision making processes. In the cotton zone of Mali opportunities and constraints vary with the resource endowment of
farms. Furthermore, as households are large in this region, often comprising 20–50 family members, intra household
diversity may influence perceptions and risk management. For this reason, we analysed diversity both
among and within farms. Information was gathered through focus group discussions and a survey with 250
people from 58 households. Risk was assessed as the combination of the perceived frequency of occurrence of
hazards and the impact on food availability and income. Farmers faced a diversity of risks, with hazards related
to animal and personal health, and climate variability of highest concern. Resource endowment of farms was
related to risk perception to a limited extent. Differences within the household were related to the generational
factor and decision power, and not to gender. Household members with decision power worried most about
risks. Almost a quarter of described hazards occurred with a high frequency and led to a high impact on food
availability and income. Low resource-endowed farms were more often exposed to high risks than other farm
types. Farmers applied a variety of actions to cope with hazards, yet in many cases farmers lacked a response.
Medical actions were targeted to human and animal health hazards. Changes in field and animal management
practices, adapted consumption rates and calls on social interactions, were combined for a diversity of hazards.
By assessing the diversity of risks encountered by farmers and the diversity of risk management actions taken by
farmers, this study goes beyond common risk research that focuses on a single hazard. Our results suggest that
development interventions should not focus on either agronomic or economic options separately, but combine
both to strengthen social well-being and agricultural production
The Baryon asymmetry in the Standard Model with a low cut-off
We study the generation of the baryon asymmetry in a variant of the standard
model, where the Higgs field is stabilized by a dimension-six interaction.
Analyzing the one-loop potential, we find a strong first order electroweak
phase transition for Higgs masses up to at least 170 GeV. Dimension-six
operators induce also new sources of CP violation. We compute the baryon
asymmetry in the WKB approximation. Novel source terms in the transport
equations enhance the generated baryon asymmetry. For a wide range of
parameters the model predicts a baryon asymmetry close to the observed value.Comment: 22 pages, latex, 6 figure
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