384 research outputs found
Addendum to the article: On the Dirichlet to Neumann Problem for the 1-dimensional Cubic NLS Equation on the Half-Line
This is an author-created, un-copyedited version of an article accepted for publication in Nonlinearity. The publisher is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at http://dx.doi.org/10.1088/0951-7715/29/10/3206We present a short note on the extension of the results of [1] to the case of non-zero initial data. More specifically, the defocusing cubic NLS equation is considered on the half-line with decaying (in time) Dirichlet data and sufficiently smooth and decaying (in space) initial data. We prove that for this case also, and for a large class of decaying Dirichlet data, the Neumann data are sufficiently decaying so that the Fokas unified method for the solution of defocusing NLS is applicable
The building industry in Greece : its role in the post-war Greek economy
The building industry acquired considerable dimensions
as an economic activity during the post-war period in
Greece, and became one of the main sectors of the economy.
This thesis grasps the development of the building industry
as an aspect of the industrialisation that took place with
the initiative of foreign capital, the concomitant relative
decline of the agricultural sector and the ensuing rural
exodus and urban expansion.
An interpretation is provided of the fact that the
building industry developed along the lines of a mode approximating
petty commodity rather than capitalist production
proper, the decisive influence being attributed to the conditions
of land ownership prevalent in Greece, while the
limited size of the industry's market, confined by local
boundaries, is seen as an additional factor.
This system of building production, ultimately the conditions
of land ownership upon which it is founded, and the
system of financing it developed is seen as a mechanism
distributing incomes in favour of middle and lower classes,
explaining at the same time the solution of the housing problem
in Greece, in spite of the absence of State intervention
in this field.
An interpretation is also provided of the fact that the building industry functioned as an important stimulator of
the economy of the period developing an integrated basis
of production amidst an industrial environment characterised by the relative absence of integration of the stages
of production within the boundaries of the domestic economy.
Finally, this thesis establishes both in theoretical
terms and through the concrete analysis undertaken, the so
far widely disputed productive character of the building
industry, and its significant effects on the general
socio-economic development of the country
Isoperibolic study of hydroxylamine in aqueous solutions in the presence of selected inorganic salts
PresentationThe thermal decomposition of hydroxylamine aqueous solutions in two different concentrations and two temperatures was studied in the presence of KCl, NaCl and Na2SO4 using isoperibolic calorimetry. It was found that Na2SO4 was substantially reducing its decomposition rate, while the other two compounds had a rather insignificant influence on hydroxylamine decomposition rate. The results are compared with the effect that the same salts have on ammonium nitrate decomposition rate and similarities and differences are discussed
On the Dirichlet to Neumann Problem for the 1-dimensional Cubic NLS Equation on the half-line
This is an author-created, un-copyedited version of an article accepted for publication in Nonlinearity. The publisher is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at http://dx.doi.org/10.1088/0951-7715/28/9/3073Initial-boundary value problems for 1-dimensional `completely integrable' equations can be solved via an extension of the inverse scattering method, which is due to Fokas and his collaborators. A crucial feature of this method is that it requires the values of more boundary data than given for a well-posed problem. In the case of cubic NLS, knowledge of the Dirichet data su ces to make the problem well-posed but the Fokas method also requires knowledge of the values of Neumann data. The study of the Dirichlet to Neumann map is thus necessary before the application of the `Fokas transform'. In this paper, we provide a rigorous study of this map for a large class of decaying Dirichlet data. We show that the Neumann data are also su ciently decaying and that, hence, the Fokas method can be applied
Tailoring the specificity of the type C feruloyl esterase FoFaeC from Fusarium oxysporum towards methyl sinapate by rational redesign based on small molecule docking simulations
The type C feruloyl esterase FoFaeC from Fusarium oxysporum is a newly discovered enzyme with high potential for use in the hydrolysis of lignocellulosic biomass but it shows low activity towards sinapates. In this work, small molecule docking simulations were employed in order to identify important residues for the binding of the four model methyl esters of hydroxycinnamic acids, methyl ferulate/caffeate/sinapate/p-coumarate, to the predicted structure of FoFaeC. Subsequently rational redesign was applied to the enzyme’ active site in order to improve its specificity towards methyl sinapate. A double mutation (F230H/T202V) was considered to provide hydrophobic environment for stabilization of the methoxy substitution on sinapate and a larger binding pocket. Five mutant clones and the wild type were produced in Pichia pastoris and biochemically characterized. All clones showed improved activity, substrate affinity, catalytic efficiency and turnover rate compared to the wild type against methyl sinapate, with clone P13 showing a 5-fold improvement in catalytic efficiency. Although the affinity of all mutant clones was improved against the four model substrates, the catalytic efficiency and turnover rate decreased for the substrates containing a hydroxyl substitution
Tenebrio molitor larvae meal inclusion affects hepatic proteome and apoptosis and/or autophagy of three farmed fish species
Herein, the effect of dietary inclusion of insect (Tenebrio molitor) meal on hepatic pathways of apoptosis and autophagy in three farmed fish species, gilthead seabream (Sparus aurata), European seabass (Dicentrarchus labrax) and rainbow trout (Oncorhynchus mykiss), fed diets at 25%, 50% and 60% insect meal inclusion levels respectively, was investigated. Hepatic proteome was examined by liver protein profiles from the three fish species, obtained by two-dimensional gel electrophoresis. Although cellular stress was evident in the three teleost species following insect meal, inclusion by T. molitor, D. labrax and O. mykiss suppressed apoptosis through induction of hepatic autophagy, while in S. aurata both cellular procedures were activated. Protein abundance showed that a total of 30, 81 and 74 spots were altered significantly in seabream, European seabass and rainbow trout, respectively. Insect meal inclusion resulted in individual protein abundance changes, with less number of proteins altered in gilthead seabream compared to European seabass and rainbow trout. This is the first study demonstrating that insect meal in fish diets is causing changes in liver protein abundances. However, a species-specific response both in the above mentioned bioindicators, indicates the need to strategically manage fish meal replacement in fish diets per species
Studying the association between musculoskeletal disorders, quality of life and mental health. A primary care pilot study in rural Crete, Greece
<p>Abstract</p> <p>Background</p> <p>The burden of musculoskeletal disorders (MSD) on the general health and well-being of the population has been documented in various studies. The objective of this study was to explore the association between MSD and the quality of life and mental health of patients and to discuss issues concerning care seeking patterns in rural Greece.</p> <p>Methods</p> <p>Patients registered at one rural Primary Care Centre (PCC) in Crete were invited to complete the Nordic Musculoskeletal Questionnaire (NMQ) for the analysis of musculoskeletal symptoms, together with validated instruments for measuring health related quality of life (SF-36) and mental distress (GHQ-28).</p> <p>Results</p> <p>The prevalence rate of MSD was found to be 71.2%, with low back and knee pain being the most common symptoms. Most conditions significantly impaired the quality of life, especially the physical dimensions of SF-36. Depression was strongly correlated to most MSD (<it>p </it>< 0.001). Multiple logistic analyses revealed that patients who consulted the PCC due to MSD were likely to have more mental distress or impaired physical functioning compared to those who did not.</p> <p>Conclusion</p> <p>Musculoskeletal disorders were common in patients attending the rural PCC of this study and were associated with a poor quality of life and mental distress that affected their consultation behaviour.</p
What does supervision help with? a survey of 315 social workers in the UK
What does social work supervision help with? There are many different models of supervision and an increasing amount of research. Much of this is concerned with the content of supervision and how supervisors (and supervisees) should behave — and these are important concerns. But even more important is the question of who or what supervision helps with. Supervision is widely considered to have many different functions but in the context of UK local authority social work, must ultimately prove itself as a method for helping people who use services. This article reports on a survey of 315 social workers from UK local authorities. Most reported that supervision helps primarily with management oversight and accountability. However, the small number of practitioners who received regular group supervision and those who received supervision more frequently said it helped with a much broader range of things
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