8,134 research outputs found
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Dual isotopic composition of methane in Murchison meteorite
Dual isotopic composition (H and C) of methane extracted from a small sample of Murchison meteorite reveals a deuterium enrichment for this molecule, indicating the presence of interstellar hydrogen
Structural analysis of silicon solar arrays
Engineering mechanics in structural design of silicon solar array
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Laser ablation of Diamond and Genesis concentrator target material
UV laser ablations of CVD diamond using two wavelengths of radiation (266 nm and 213 nm) have been compared. The impetus for this work is the 2004 return of Genesis and extraction of solar-wind oxygen implanted in diamond
Infertility problems and mental health symptoms in a community-based sample: depressive symptoms among infertile men, but not women
Most researchers agree that men’s and women’s experiences of infertility are
fundamentally different, and impacts upon the nature of psychological distress
encountered. However, design flaws, including non-random samples
unrepresentative of the general population, compromise many existing studies. Data
derived from a random general community sample provides prevalence of current
infertility, and permits examination of longitudinal associations between mental
health symptoms and infertility among 1,978 participants aged 28-32 years. In the
previous 12-months, infertility was experienced by 2.1% and 5.4% partnered men
and women. Infertility independently predicted depressive symptomatology in men,
and anxiety symptoms among women. Gender differences were sustained, even
controlling for prior depression and anxiety. Health professionals are encouraged
to proactively enquire about affective symptoms experienced by both women and
men with infertility problems
The Theory of the Nucleon Spin
I discuss two topics of current interest in the study of the spin structure
of the nucleon. First, I discuss whether there is a sum rule for the components
of the nucleon's angular moments. Second, I discuss the measurement of the
nucleon's transversity distribution in light of recent results reported by the
HERMES collaboration at DESY.Comment: 15 pages, 8 figures, LaTeX using rspublic.cls and BoxedEPS macros; as
submitted to Phil Trans A of the Royal Society for forthcoming volume: The
Quark Structure of Matter; email correspondence to [email protected]
Rapidity Gaps Between Jets
An excess of events with a rapidity gap between jets, over what would be
expected from non-diffractive processes, has been observed at HERA. A process
based on a perturbative QCD calculation of colour singlet exchange has been
added to HERWIG. With this addition, HERWIG is able to describe the number of
events with a gap between jets over the number without a gap. This gap fraction
is predicted to rise at large rapidity intervals between jets which would only
be visible if the detector coverage were increased.Comment: 5 pages including 3 figures. To appear in the conference proceedings
of the Workshop "Future Physics at HERA
Micropolitics and working as a performance analyst in professional sport
This chapter introduces the background to, and theoretical concepts of, micropolitics, along with some of the key findings from related literature. It provides a discussion that emphasises performance analysts’ understanding of the complex and ambiguous nature of professional working life, and some suggestions for improving your ability to navigate the micropolitical terrain. Frequently used throughout the literature, Blase’s definition of micropolitics states that micro-politics refers to the use of formal and informal power by individuals and groups to achieve their goals. Key to Kelchtermans’ micro-political inquiry are two frameworks: subjective educational theory, which is the personal system of knowledge and beliefs about professional sport that practitioners use to perform their jobs, and the personal interpretive framework, which is the set of beliefs and representations developed over time that operates as a lens through which practitioners perceive their job situation and their behaviours
QCD and Hadron Dynamics
Perturbative QCD predicts and describes various features of multihadron
production. An amazing similarity between observable hadron systems and
calculable underlying parton ensembles justifies the attempts to use the
language of quarks and gluons down to small momentum scales, to approach the
profound problems that are commonly viewed as being entirely non-perturbative.Comment: Talk at the Royal Society meeting "Structure of Matter", London, May
200
Barriers and influences to pro-environmental behaviour in the workplace
We carried out a science–practitioner research case study to encourage pro-environmental behaviour in the workplace, using multiple methods based on psychological theory to implement and evaluate interventions, such as improving signage for the recycling scheme. The results suggest that providing clearer information, making behaviour easier and using feedback and social norms can have a beneficial effect on the development of recycling and energy saving behaviours in the workplace
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