Arrival direction distribution of cosmic rays of energy 10 (18) eV

The Haverah Park air-shower experiment recorded over 8500 events with primary energy 10 to the 18th power eV between 1963 and 1983. An analysis of these events for anisotropies in celestial and galactic coordinates is reported. No very striking anisotropies are observed

Observations of Cygnus X-3 above 10(15) eV from 1979 - 1984

The ultra high energy gamma-ray source, cygnus X-3, has been observed more or less continuously with an array sensitive to 10 to the 15th power ev primaries between 1 Jan. 1979 and 31 Dec. 1984. There is evidence for time variability in the phase of gamma-ray emission over this period

Spontaneous Jamming in One-Dimensional Systems

We study the phenomenon of jamming in driven diffusive systems. We introduce a simple microscopic model in which jamming of a conserved driven species is mediated by the presence of a non-conserved quantity, causing an effective long range interaction of the driven species. We study the model analytically and numerically, providing strong evidence that jamming occurs; however, this proceeds via a strict phase transition (with spontaneous symmetry breaking) only in a prescribed limit. Outside this limit, the nearby transition (characterised by an essential singularity) induces sharp crossovers and transient coarsening phenomena. We discuss the relevance of the model to two physical situations: the clustering of buses, and the clogging of a suspension forced along a pipe.Comment: 8 pages, 4 figures, uses epsfig. Submitted to Europhysics Letter

Qualitative evidence syntheses : assessing the relative contributions of multi‐context and single‐context reviews

Aims To examine the strengths and weaknesses of multi‐context (international) qualitative evidence syntheses in comparison with single‐context (typically single‐country) reviews. We compare a multi‐country synthesis with single‐context syntheses on facility‐based delivery in Nigeria and Kenya. Design Discussion Paper. Background Qualitative evidence increasingly contributes to decision‐making. International organisations commission multi‐context reviews of qualitative evidence to gain a comprehensive picture of similarities and differences across comparable (e.g. low‐ and middle‐income) countries. Such syntheses privilege breadth over contextual detail, risking inappropriate interpretation and application of review findings. Decision‐makers value single‐context syntheses that account for the contexts of their populations and health services. We explore how findings from multi‐ and single‐context syntheses contribute against a conceptual framework (adequacy, coherence, methodological limitations and relevance) that underpins the GRADE Confidence in Evidence of Reviews of Qualitative Evidence approach. Data sources Included studies and findings from a multi‐context qualitative evidence synthesis (2001‐2013) and two single‐context syntheses (Nigeria, 2006‐2017; and Kenya, 2002‐2016; subsequently, updated and revised). Findings Single‐context reviews contribute cultural, ethnic and religious nuances as well as specific health system factors (e.g. use of a voucher system). Multi‐context reviews contribute to universal health concerns and to generic health system concerns (e.g. access and availability). Implications for nursing: Nurse decision‐makers require relevant, timely and context‐sensitive evidence to inform clinical and managerial decision‐making. This discussion paper informs future commissioning and use of multi‐ and single‐context qualitative evidence syntheses. Conclusion Multi‐ and single‐context syntheses fulfil complementary functions. Single‐context syntheses add nuances not identifiable within the remit and timescales of a multi‐context review

Research Output and Pattern of Publication among Faculty in Nigerian Private Universities: Babcock University Experience

The paper investigates the patterns of research output publications of faculty of Babcock University, Nigeria. Survey design was adopted; the population for the study consists of 154 faculty of Babcock University. Data for the study was collected using questionnaire titled Patterns of Research Output and Publications among Faculty in Private Universities (ROPAFPU).  Data collected was analyzed using descriptive statistics, frequency counts and simple percentage while the hypotheses were tested using Product Moment Correlation and chi- square. The result of the hypotheses showed that there is significant relationship between the status of faculty and pattern of research output publication, there is also significant relationship between the qualification and pattern of research output publication of the faculty and there is also significance difference in pattern of publications based on gender. Recommendations made for the improvement of research output publication of the faculty  include mentoring, collaboration with foreign colleagues in research and publication; male lecturers should endeavor to publish more journal publications and female faculty be encouraged to increase their seminar presentation as well as text books publishing. Key Words: Research output, Babcock University Faculty research output, Research and national development, Babcock University Faculty Publication pattern

Coupled Fluctuations near Critical Wetting

Recent work on the complete wetting transition has emphasized the role played by the coupling of fluctuations of the order parameter at the wall and at the depinning fluid interface. Extending this approach to the wetting transition itself we predict a novel crossover effect associated with the decoupling of fluctuations as the temperature is lowered towards the transition temperature T_W. Using this we are able to reanalyse recent Monte-Carlo simulation studies and extract a value \omega(T_W)=0.8 at T_W=0.9T_C in very good agreement with long standing theoretical predictions.Comment: 4 pages, LaTex, 1 postscript figur

Asymmetric exclusion model with several kinds of impurities

We formulate a new integrable asymmetric exclusion process with $N-1=0,1,2,...$ kinds of impurities and with hierarchically ordered dynamics. The model we proposed displays the full spectrum of the simple asymmetric exclusion model plus new levels. The first excited state belongs to these new levels and displays unusual scaling exponents. We conjecture that, while the simple asymmetric exclusion process without impurities belongs to the KPZ universality class with dynamical exponent 3/2, our model has a scaling exponent $3/2+N-1$. In order to check the conjecture, we solve numerically the Bethe equation with N=3 and N=4 for the totally asymmetric diffusion and found the dynamical exponents 7/2 and 9/2 in these cases.Comment: to appear in JSTA

Theoretical and numerical studies of chemisorption on a line with precursor layer diffusion

We consider a model for random deposition of monomers on a line with extrinsic precursor states. As the adsorbate coverage increases, the system develops non-trivial correlations due to the diffusion mediated deposition mechanism. In a numeric simulation, we study various quantities describing the evolution of the island structure. We propose a simple, self-consistent theory which incorporates pair correlations. The results for the correlations, island density number, average island size and probabilities of island nucleation, growth and coagulation show good agreement with the simulation data.Comment: 17 pages(LaTeX), 11 figures(1 PS file, uuencoded), submmited to Phys. Rev.