Electrostatic charging and discharging models and analysis for ranger spacecraft during launch

Electrostatic charging and discharging models and analysis for Ranger spacecraft during launc

Stably free modules over virtually free groups

Let $F_m$ be the free group on $m$ generators and let $G$ be a finite nilpotent group of non square-free order; we show that for each $m\ge 2$ the integral group ring ${\bf Z}[G\times F_m]$ has infinitely many stably free modules of rank 1.Comment: 9 pages. The final publication is available at http://www.springerlink.com doi:10.1007/s00013-012-0432-

A framework for utility data integration in the UK

In this paper we investigate various factors which prevent utility knowledge from being fully exploited and suggest that integration techniques can be applied to improve the quality of utility records. The paper suggests a framework which supports knowledge and data integration. The framework supports utility integration at two levels: the schema and data level. Schema level integration ensures that a single, integrated geospatial data set is available for utility enquiries. Data level integration improves utility data quality by reducing inconsistency, duplication and conflicts. Moreover, the framework is designed to preserve autonomy and distribution of utility data. The ultimate aim of the research is to produce an integrated representation of underground utility infrastructure in order to gain more accurate knowledge of the buried services. It is hoped that this approach will enable us to understand various problems associated with utility data, and to suggest some potential techniques for resolving them

Ballistic magnon heat conduction and possible Poiseuille flow in the helimagnetic insulator Cu2_2OSeO3_3

We report on the observation of magnon thermal conductivity $\kappa_m\sim$ 70 W/mK near 5 K in the helimagnetic insulator Cu$_2$OSeO$_3$, exceeding that measured in any other ferromagnet by almost two orders of magnitude. Ballistic, boundary-limited transport for both magnons and phonons is established below 1 K, and Poiseuille flow of magnons is proposed to explain a magnon mean-free path substantially exceeding the specimen width for the least defective specimens in the range 2 K $<T<$ 10 K. These observations establish Cu$_2$OSeO$_3$ as a model system for studying long-wavelength magnon dynamics.Comment: 10pp, 9 figures, accepted PRB (Editor's Suggestion

UK utility data integration: overcoming schematic heterogeneity

In this paper we discuss syntactic, semantic and schematic issues which inhibit the integration of utility data in the UK. We then focus on the techniques employed within the VISTA project to overcome schematic heterogeneity. A Global Schema based architecture is employed. Although automated approaches to Global Schema definition were attempted the heterogeneities of the sector were too great. A manual approach to Global Schema definition was employed. The techniques used to define and subsequently map source utility data models to this schema are discussed in detail. In order to ensure a coherent integrated model, sub and cross domain validation issues are then highlighted. Finally the proposed framework and data flow for schematic integration is introduced

STRESS AND ITS ENERGETIC EFFECT IN TEENS

Numerous studies have confirmed the existence of electromagnetic and proposed subtle energy fields within and around the physical body. Structures such as meridians and chakras associated with these fields have been identified. Experimentation within the past 100 years in particular served to illustrate a vast array of patterns and behaviors of those electromagnetic and subtle energy fields, which in turn, gave rise to theories of energy-based therapies such as acupuncture, homeopathy and hands-on healing. Some practitioners of energy-based medicine such as Caroline Myss, PhD, and Richard Gerber, MD, have directly linked dysfunction of chakras and meridians to the development of illness in the physical body. If a link exists between the behavior of energy in the body and manifestation of physical or psychological distress, it should be possible to demonstrate such an association in a carefully constructed study. This paper describes such a study, in which selected indices of stress were positively correlated with irregular energy flows within the energy systems of a sample of teens. It was hypothesized that when an individual experiences stress, the energy flows in his/her body becomes disorganized and this disorganization is associated with commonly accepted symptoms of physiological and psychological distress. Further, the more disorganized the energy in the body, the greater the number and nature of symptoms. Thirty-two teens, aged 15 to 19 completed a selfadministered questionnaire, an in-depth interview and examination of the body’s energy systems. Though most teens exhibited disorganization in several of their energy systems, some of the teens, who presented the greatest disorganization also exhibited the greatest number of physiological and psychological symptoms. Chi-Square tests showed that a significant relationship exists between self-reported stress level and irregularity in specific energy flows, as well as for energetic irregularity and self-reported mental and physical health ratings. When teens were grouped by the presence (or absence) of Triple Warmer Reactivity and/or Frozen energy, the correlation between physiological or psychological symptoms and energetic irregularity was even more demonstrable. Triple Warmer Reactivity appeared to affect strongly teens’ physical and mental well-being. Assuming a link between the energetic and physical body, intervention at this age with specific techniques to correct energy irregularities could mitigate potential future, physical and mental issues. These results are preliminary and need to be replicated and extended to include objective measures of stress, health and other potentially related variables with a larger sample of teens