Simulations of Solid-on-Solid Models of Spreading of Viscous Droplets

We have studied the dynamics of spreading of viscous non-volatile fluids on surfaces by MC simulations of SOS models. We have concentrated on the complete wetting regime, with surface diffusion barriers neglected for simplicity. First, we have performed simulations for the standard SOS model. Formation of a single precursor layer, and a density profile with a spherical cap shaped center surrounded by Gaussian tails can be reproduced with this model. Dynamical layering (DL), however, only occurs with a very strongly attractive van der Waals type of substrate potential. To more realistically describe the spreading of viscous liquid droplets, we introduce a modified SOS model. In the new model, tendency for DL and the effect of the surface potential are in part embedded into the dynamics of the model. This allows a relatively simple description of the spreading under different conditions, with a temperature like parameter which strongly influences the droplet morphologies. Both rounded droplet shapes and DL can easily be reproduced with the model. Furthermore, the precursor width increases proportional to the square root of time, in accordance with experimental observations. PACS: 68.10.Gw, 05.70.Ln, 61.20.Ja.Comment: to appear in Physica A (1994), standard LaTex, 20 page

On the integrability of a new lattice equation found by multiple scale analysis

In this paper we discuss the integrability properties of a nonlinear partial difference equation on the square obtained by the multiple scale integrability test from a class of multilinear dispersive equations defined on a four points lattice

RUNX oncoproteins and miRNA networks

News on: An AML1-ETO/miR-29b-1 regulatory circuit modulates phenotypic properties of acute myeloid leukemia cells by Zaidi et al. Oncotarget. 2017; 8:39994-40005. https://doi.org/10.18632/oncotarget.18127

A Completeness Study on Certain 2×22\times2 Lax Pairs Including Zero Terms

We expand the completeness study instigated in [J. Math. Phys. 50 (2009), 103516, 29 pages] which found all $2\times2$ Lax pairs with non-zero, separable terms in each entry of each Lax matrix, along with the most general nonlinear systems that can be associated with them. Here we allow some of the terms within the Lax matrices to be zero. We cover all possible Lax pairs of this type and find a new third order equation that can be reduced to special cases of the non-autonomous lattice KdV and lattice modified KdV equations among others

Process tracing: a laudable aim or a high-tariff methodology?

It was with considerable pleasure and enthusiasm that I accepted the invitation of Christine Trampusch and Bruno Palier, the editors of this special issue, to respond to their small but excellent collection of papers on process tracing in political economy. Like them (Trampusch and Palier 2016), I am convinced that what they and others typically call process tracing can, if appropriately (and, indeed, sparingly) used, help open the black box of causation in social, political and economy systems; it can, in short, help us fashion better explanations of social, political and economic outcomes. I am also convinced, like them, that the clarification of what process tracing actually entails methodologically, as is the principal aim of this special issue, will help us better make that case. In the, alas, all too limited space I have, I cannot and hence do not seek to provide a detailed commentary and reflection on each of the papers in this collection. Instead, I will keep my comments very general – using, as my point of departure, the editors’ very useful framing essay. I will confine myself to three appreciative, though at the same time critical yet I hope constructive, observations in the hope of advancing the debat

Study-development of improved photointerpretative techniques to wheat identification

There are no author-identified significant results in this report

Development of techniques for producing static strata maps and development of photointerpretive methods based on multitemporal LANDSAT data

Progress in the evaluation of the static stratification procedure and the development of alternative photointerpretive techniques to the present LACIE procedure for the identification of training fields is reported. Statistically significant signature controlling variables were defined for use in refining the stratification procedure. A subset of the 1973-74 Kansas LACIE segments for wheat was analyzed

Agricultural interpretation technique development

There are no author-identified significant results in this report

Development of techniques for producing static strata maps and development of photointerpretation methods based on multitemporal LANDSAT data

The progress of research conducted in support of the Large Area Crop Inventory Experiment (LACIE) is documented. Specific tasks include (1) evaluation of the static stratification procedure and modification of that procedure if warranted, and (2) the development of alternative photointerpretative techniques to the present LACIE procedures for the identification and selection of training fields (areas)

Estimating the prevalence of drug use using mark-recapture methods

Sparked by the need to inform the response to the spread of HIV/AIDS in drug injecting populations in the 1980s and the desire to base local, national and international responses to tackling drug use in the 1990s on solid epidemiological data, the mark-recapture method has increasingly been used to estimate the prevalence of drug use. Richard Cormack provided support and advice to some of the first United Kingdom and European studies to estimate drug use prevalence in this way. The approach he outlined, using macros that he developed, has led to the mark-recapture method being used to systematically assess the use of drugs such as heroin or other opioids in the United Kingdom and across Europe. We review the development of the method when applied to estimating the size of drug-using populations, including the use of Bayesian methods. We discuss its limitations and various criticisms that have been voiced