Atomic clouds as distributed sources for the plasma torus

Implications of recent developments for the neutral particle environment of Jupiter are considered. The first detection is reported of very hot S+ ions with gyrospeeds comparable to the corotations speed, a phenomenon which results from a neutral sulfur cloud. Evidence supports the hypothesis that extensive neutral clouds of oxygen and sulfur exist and are important sources of ions and energy for the Io torus

Phase Diagram of the 1D Kondo Lattice Model

We determine the boundary of the fully polarized ferromagnetic ground state in the one dimensional Kondo lattice model at partial conduction electron band filling by using a newly developed infinite size DMRG method which conserves the total spin quantum number. The obtained paramagnetic to ferromagnetic phase boundary is below $J \approx 3.5$ for the whole range of band filling. By this we solve the controversy in the phase diagram over the extent of the ferromagnetic region close to half filling.Comment: 6 pages, 4 EPS figures. Presented at MOS9

Review of presentations at the 6th European Lupus Meeting 3-5 March 2005.

The 6th European Lupus Meeting was held at the Royal College of Physicians of London and was attended by 450 delegates. The conference brought together leading speakers from Europe and North America who reviewed current knowledge and exciting new developments in both clinical and basic science aspects of systemic lupus erythematosus. This review summarizes the major points covered in each session

‘I see the future’: Associations between innovation and resources in the case of an exporting Western Australian regional family firm

Purpose – The purpose of this study is to investigate the associations between the resources of a Western Australian regional family firm exporting to Asia and innovation through the lens of the theory of innovation and the resource based view (RBV) of the firm. Design/methodology/approach – In-depth, un-structured telephone and face-to-face interviews were conducted with five members of the firm, including the co-owner. A visit to the business facilities complemented the data collection process. Findings – The importance of tangible and intangible resources, such as forward thinking or investments in technologies, human capital and research is clearly illustrated; these resources positively influence innovative practices. Associations between the findings and the theoretical frameworks were identified. For instance, the imperfectly imitable and non-substitutable attributes comply with the RBV of the firm, and the hypothesised four dimensions of innovation. Importantly, the significance of strategic partnering emerges as an extension of these attributes. Originality/value – This study addresses some knowledge gaps, first, contributing to the body of research on family firms’ adoption of innovation. In addition, the study contributes to the literature on regional Western Australian family firms operating internationally. This state makes a significant contribution to Australia’s economy, and its close geographic proximity to various important consumer markets highlights future opportunities for family firms in international trade. Despite such potential, research on global family firms operating in this state has been almost non-existent

Entrepreneurial CSR, managerial role and firm resources: a case study approach

Purpose: The purpose of this study is to contribute to the extant body of the entrepreneurship and business management literature, investigating corporate social responsibility (CSR) and its implications for firms’ competitiveness. The cases of four different firms are examined through the lens of the resource-based view of the firm and role theory. Design/methodology/approach: Face-to-face and telephone interviews were conducted with the owners and managers of four model firms identified in Western Australia. Findings: While financial outcomes clearly stand out as the end goal for engaging in CSR-related practices, the importance of firm managers’ entrepreneurial role emerges in using existing resources to exploit business opportunities to ultimately achieve competitiveness, benefit the organisation, the community and society. Management’s ability to reconcile financial objectives and CSR practices give rise to the notion of entrepreneurial CSR. Originality/value: The study demonstrates that management’s entrepreneurial drive, skills, knowledge, expertise or strategic strengths can identify substantial opportunities. Furthermore, the investment of resources to develop socially responsible products and services can help achieve CSR and the firm’s bottom line. Finally, learning about participants’ motivations for engaging in CSR could identify areas, concepts and directions to be considered by entrepreneurs, compared/contrasted to previous research or even operationalised by enterprises of different sizes elsewhere. © 2018, Emerald Publishing Limited

Densities and abundances of hot cometary ions in the coma of P/Halley

On its flight by P/Halley, the Giotto spacecraft carried a High Energy Range Spectrometer (HERS) for measuring the properties of cometary ions picked up by the solar wind in the nearly collisionless regions of the coma. Preliminary estimates of the ion densities observed by HERS were reevaluated and extended; density profiles along the Giotto trajectory are presented for 13 values of ion mass/charge. Comparison with the physical-chemical model of the interaction of sunlight and the solar wind with the comet by other researchers reveals that, with the exception of protons and H2(+), all ion densities were at least an order of magnitude higher than predicted. The high ion densities cannot be explained on the basis of compression of the plasma, but require additional or stronger ionization mechanisms. Ratios of the densities of different ion species reveal an overabundance of carbonaceous material and an underabundance of H2(+) compared to the predictions of the Schmidt. While the densities of solar wind ions (H(+) and He(++)) changed sharply across a magnetic discontinuity located 1.35(10)(exp 5) km from the comet, this feature, which has been called both the 'cometopause' and the 'magnetic pileup boundary' was barely distinguishable in the density profiles of hot cometary ions. This result is consistent with the interpretation that the magnetic pileup boundary detected by Giotto was caused by a discontinuity in the solar wind and is not an intrinsic feature of the interaction of the solar wind with an active comet

A New Large Super-Fast Rotator: (335433) 2005 UW163

Asteroids of size larger than 150 m generally do not have rotation periods smaller than 2.2 hours. This spin cutoff is believed to be due to the gravitationally bound rubble-pile structures of the asteroids. Rotation with periods exceeding this critical value will cause asteroid breakup. Up until now, only one object, 2001 OE84, has been found to be an exception to this spin cutoff. We report the discovery of a new super-fast rotator, (335433) 2005 UW163, spinning with a period of 1.290 hours and a lightcurve variation of $r'\sim0.8$ mag from the observations made at the P48 telescope and the P200 telescope of the Palomar Observatory. Its $H_{r'} = 17.69 \pm 0.27$ mag and multi-band colors (i.e., $g'-r' = 0.68\pm0.03$ mag, $r'-i' = 0.19\pm0.02$ mag and SDSS $i-z = -0.45$ mag) show it is a V-type asteroid with a diameter of $0.6 +0.3/-0.2$ km. This indicates (335433) 2005 UW163 is a super-fast rotator beyond the regime of the small monolithic asteroid.Comment: 18 pages, 4 figures, 1 table Accepted by ApJ

Long-term efficacy of an education programme in improving adherence with continuous positive airway pressure treatment for obstructive sleep apnoea

This randomised controlled trial demonstrated that a motivational enhancement programme composed of a single interview and a follow-up phone call at the initiation of continuous positive airway pressure treatment can improve treatment adherence in subjects with obstructive sleep apnoea, even after 1 year, and lead to better health outcome in terms of reducing daytime sleepiness.published_or_final_versio

Aerosol-Assisted Chemical Vapour Deposition of Transparent Zinc Gallate Films

Aerosol-assisted chemical vapour deposition (AACVD) reactions of GaMe3, ZnEt2 and the donor-functionalised alcohol HOCH2CH2OMe (6 equiv.) in toluene resulted in the deposition of amorphous transparent zinc gallate (ZnGa2O4) films at a range of temperatures (350–550 °C). The zinc–gallium oxide films were analyzed by scanning electron microscopy, X-ray photoelectron spectroscopy (XPS), energy-dispersive X-ray analysis, glancing-angle X-ray powder diffraction (XRD) and optical studies. The optimum growth temperature was found to be 450 °C, which produced transparent films with excellent coverage of the substrate. XPS confirmed the presence of zinc, gallium and oxygen in the films. Annealing these films at 1000 °C resulted in crystalline films and glancing-angle powder XRD showed that a zinc gallate spinel framework with a lattice parameter of a=8.336(5) Å was adopted

Phytochemical, Cytotoxicity and Antioxidant Activities of Five Anti-malaria Plants

The study investigated the phytochemical, cytotoxicity and antioxidant properties of Allamanda cathartica (AC), Bixa orellana (BO), Cymbopogon citratus (CC), Ficus exasperata (FE) and Momordica charantia (MC) used traditionally for the anti-malarial preparations “Agbo” in Nigeria. Phytochemical screening of the plants showed the presence of flavonoids, terpenoids, phenolics, cardiac glycosides and reducing sugars. Free radical scavenging activity of the plants with 2, 2-Diphenyl-1-Picrylhydrazyl (DPPH) recorded significant IC50 values for the inhibition of DPPH by ethanolic leaves extracts of AC (0.46), BO (0.45), CC (1.35) and FE (0.86), respectively and Vit. E (control), recorded higher activity at 0.5 mg mLG1 with an IC50 of 0.25 μg mLG1 . BO leaf extracts recorded the most potent effect (0.45) at low concentration of 0.5 mg mLG1 . The free radical scavenging activities of these plants doubtlessly contribute to their use in indigenous malaria therapy and may qualify them for anti-malarial drug screening