342 research outputs found
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Accelerating movement across the intentional arc – developing the strategic sensographer
Our research question relates to those who need to be activists in strategic sensography as described in the call for papers. We call these activists “strategic sensographers”. Our own definition of sensuous is characterised by a pseudo-formula, namely 5S+3D (5 senses plus 3 dimensions), which we contrast with the 2S+2D world which dominates the modern office and even university.We take strategists to include both senior executives themselves and those who explicitly support them in the strategy process, whether in a line or staff role. Our model of the intuitive qualities required for strategists has in part been derived from the recruitment criteria of leading organisations, as well as from analyses of the qualities needed to support creativity and innovation (Lucas, Claxton and Spencer, 2012).We examined the routes through which strategists are currently educated or shaped, and conclude as have others (Mintzberg, 2005), that their education is biased in favour of rational-logical thinking. It is in part the tension and interplay between the rational and the intuitive that contributes to sensography, a term that has in part spun off from “stratography” (Cummings and Angwin, 2011)
The Effects of Being in a “New Relationship” on Levels of Testosterone in Men.
In light of previous research showing that different types of relationships affect levels of testosterone in men, this study examined whether categorizing relationship types according to relationship length can shed further light on variations in levels of testosterone. Salivary testosterone samples were obtained from a sample of men and details about their relationship status, sociosexual orientation, extra-pair sexual interest, and their perceptions of their relationships were recorded. Using a median split analysis, participants who indicated that they had been in their relationship for less than 12 months were categorized as being in “new relationships” and those in longer relationships being categorized as in long-term relationships. Results showed that levels of testosterone of single men and men in new relationships did not differ, but both had significantly greater levels of testosterone than men in long-term relationships. Differences in levels of testosterone were unrelated to sociosexual orientation and extra-pair sexual interest. These findings support the evolutionary explanation of levels of testosterone in men varying in accordance with their internal motivation to seek new potential mates
Closing the window on the axigluon mass using top quark production data
The contribution of axigluons (the massive color-octet gauge bosons in all
chiral color models) to top quark pair production in hadronic collisions is
considered. The agreement between the experimental values of the ttbar
production cross-section at the TEVATRON and recent QCD predictions is used to
discuss limits on the axigluon mass. Specifically,intermediate mass axigluons,
those in the mass range 50 GeV < M_A < 120 GeV which has not already been
excluded, would increase the tree-level qqbar -> ttbar cross-section by a
factor of >= 2, thereby increasing the theoretical predictions for
sigma_{ttbar} by Delta sigma_{ttbar} = 3.2-3.7 pb (2.7-3.1 pb) using
leading-order (next-to-leading order) parton distributions over this mass
range, independent of the axigluon decay width. Such an increase is roughly
1.3-1.6 (0.9-1.2) standard deviations larger than that suggested by the
apparent good agreement between combined experimental results and recent
theoretical calculations and so is not ruled out, but is definitely disfavored.
Future high-statistics top-quark production runs will likely make a more
definitive statement. The forward-backward asymmetry in ttbar production
induced by axigluons in this mass window is also discussed and found to be
quite large and so could provide another constraint.Comment: 9 pages, LaTeX, 2 separate postscript file
The inclusion of children with disabilities in oral health research: A systematic review
OBJECTIVE: This systematic review aimed to describe the extent to which oral health research since the advent of the United Nations Convention on the Rights of the Child, the United Nations Convention on the Rights of Persons with Disabilities and the current movement on the inclusion of voices of children, has been done on or with children with disabilities. METHODS: A systematic review of the dental literature for children with disabilities from 2001 to 2017 was conducted. Electronic databases were searched for oral health literature on the involvement of children with disabilities. Each identified article was examined by 2 reviewers against the inclusion criteria and categorized according to the extent to which children with disabilities were involved in oral health research, type of study, children's ages, type of impairment and the country of origin. RESULTS: The search included 113 articles after application of the exclusion criteria. Of these papers, 6.2% were classified as research with children, 41.6% used proxies to gain the perspective of children with disabilities and 52.2% were classified as research on children with disabilities. The majority of studies, which attempted some form of inclusion, were from Sweden and India. CONCLUSIONS: Most oral health research is conducted on children with disabilities (viewing them as objects) rather than with them (viewing them as active participants). Unlike previous systematic reviews which report an increase in the inclusion of the voices of children in oral health research, children with disabilities were mostly excluded from research. Future research should attempt to use methods which involve children with disabilities as fully as possible in the research process. This ensures that their perspectives are obtained and their voices are heard
SQUID-based microtesla MRI for in vivo relaxometry of the human brain
SQUID-based MRI (magnetic resonance imaging) at microtesla fields has
developed significantly over the past few years. Here we describe application
of this method for magnetic relaxation measurements in the living human brain.
We report values of the longitudinal relaxation time T1 for brain tissues,
measured in vivo for the first time at microtesla fields. The experiments were
performed at 46 microtesla field using a seven-channel SQUID system designed
for microtesla MRI and MEG. Values of T1, measured for different tissues at
this field, are found to be close (within 5%) to the corresponding values of
the transverse relaxation time T2 at the same field. Implications of this
result for imaging contrast in microtesla MRI are discussed.Comment: To appear in Proceedings of 2008 Applied Superconductivity Conferenc
Formal Component-Based Semantics
One of the proposed solutions for improving the scalability of semantics of
programming languages is Component-Based Semantics, introduced by Peter D.
Mosses. It is expected that this framework can also be used effectively for
modular meta theoretic reasoning. This paper presents a formalization of
Component-Based Semantics in the theorem prover Coq. It is based on Modular
SOS, a variant of SOS, and makes essential use of dependent types, while
profiting from type classes. This formalization constitutes a contribution
towards modular meta theoretic formalizations in theorem provers. As a small
example, a modular proof of determinism of a mini-language is developed.Comment: In Proceedings SOS 2011, arXiv:1108.279
Haloperidol and Ziprasidone for Treatment of Delirium in Critical Illness
BACKGROUND:
There are conflicting data on the effects of antipsychotic medications on delirium in patients in the intensive care unit (ICU).
METHODS:
In a randomized, double-blind, placebo-controlled trial, we assigned patients with acute respiratory failure or shock and hypoactive or hyperactive delirium to receive intravenous boluses of haloperidol (maximum dose, 20 mg daily), ziprasidone (maximum dose, 40 mg daily), or placebo. The volume and dose of a trial drug or placebo was halved or doubled at 12-hour intervals on the basis of the presence or absence of delirium, as detected with the use of the Confusion Assessment Method for the ICU, and of side effects of the intervention. The primary end point was the number of days alive without delirium or coma during the 14-day intervention period. Secondary end points included 30-day and 90-day survival, time to freedom from mechanical ventilation, and time to ICU and hospital discharge. Safety end points included extrapyramidal symptoms and excessive sedation.
RESULTS:
Written informed consent was obtained from 1183 patients or their authorized representatives. Delirium developed in 566 patients (48%), of whom 89% had hypoactive delirium and 11% had hyperactive delirium. Of the 566 patients, 184 were randomly assigned to receive placebo, 192 to receive haloperidol, and 190 to receive ziprasidone. The median duration of exposure to a trial drug or placebo was 4 days (interquartile range, 3 to 7). The median number of days alive without delirium or coma was 8.5 (95% confidence interval [CI], 5.6 to 9.9) in the placebo group, 7.9 (95% CI, 4.4 to 9.6) in the haloperidol group, and 8.7 (95% CI, 5.9 to 10.0) in the ziprasidone group (P=0.26 for overall effect across trial groups). The use of haloperidol or ziprasidone, as compared with placebo, had no significant effect on the primary end point (odds ratios, 0.88 [95% CI, 0.64 to 1.21] and 1.04 [95% CI, 0.73 to 1.48], respectively). There were no significant between-group differences with respect to the secondary end points or the frequency of extrapyramidal symptoms.
CONCLUSIONS:
The use of haloperidol or ziprasidone, as compared with placebo, in patients with acute respiratory failure or shock and hypoactive or hyperactive delirium in the ICU did not significantly alter the duration of delirium. (Funded by the National Institutes of Health and the VA Geriatric Research Education and Clinical Center; MIND-USA ClinicalTrials.gov number, NCT01211522 .)
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Probabilistic solar wind and geomagnetic forecasting using an analogue ensemble or "Similar Day" approach
Effective space-weather prediction and mitigation requires accurate forecasting of near-Earth solar-wind conditions. Numerical magnetohydrodynamic models of the solar wind, driven by remote solar observations, are gaining skill at forecasting the large-scale solar-wind features that give rise to near-Earth variations over days and weeks. There remains a need for accurate short-term (hours to days) solar-wind forecasts, however. In this study we investigate the analogue ensemble (AnEn), or “similar day”, approach that was developed for atmospheric weather forecasting. The central premise of the AnEn is that past variations that are analogous or similar to current conditions can be used to provide a good estimate of future variations. By considering an ensemble of past analogues, the AnEn forecast is inherently probabilistic and provides a measure of the forecast uncertainty. We show that forecasts of solar-wind speed can be improved by considering both speed and density when determining past analogues, whereas forecasts of the out-of-ecliptic magnetic field [ BNBN ] are improved by also considering the in-ecliptic magnetic-field components. In general, the best forecasts are found by considering only the previous 6 – 12 hours of observations. Using these parameters, the AnEn provides a valuable probabilistic forecast for solar-wind speed, density, and in-ecliptic magnetic field over lead times from a few hours to around four days. For BNBN , which is central to space-weather disturbance, the AnEn only provides a valuable forecast out to around six to seven hours. As the inherent predictability of this parameter is low, this is still likely a marked improvement over other forecast methods. We also investigate the use of the AnEn in forecasting geomagnetic indices Dst and Kp. The AnEn provides a valuable probabilistic forecast of both indices out to around four days. We outline a number of future improvements to AnEn forecasts of near-Earth solar-wind and geomagnetic conditions
Quantum walk on distinguishable non-interacting many-particles and indistinguishable two-particle
We present an investigation of many-particle quantum walks in systems of
non-interacting distinguishable particles. Along with a redistribution of the
many-particle density profile we show that the collective evolution of the
many-particle system resembles the single-particle quantum walk evolution when
the number of steps is greater than the number of particles in the system. For
non-uniform initial states we show that the quantum walks can be effectively
used to separate the basis states of the particle in position space and
grouping like state together. We also discuss a two-particle quantum walk on a
two- dimensional lattice and demonstrate an evolution leading to the
localization of both particles at the center of the lattice. Finally we discuss
the outcome of a quantum walk of two indistinguishable particles interacting at
some point during the evolution.Comment: 8 pages, 7 figures, To appear in special issue: "quantum walks" to be
published in Quantum Information Processin
Inclusive Dijet Production at HERA: Direct Photon Cross Sections in Next-To-Leading Order QCD
We have calculated inclusive two-jet cross sections in next-to-leading order
QCD for direct photoproduction in low collisions at HERA. Infrared
and collinear singularities in real and virtual contributions are cancelled
with the phase space slicing method. Analytical formulas for the different
contributions giving the dependence on the slicing parameter are presented.
Various one- and two-jet distributions have been computed demonstrating the
flexibility of the method.Comment: 30 pages, latex, 11 figures appended as uuencoded fil
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